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 #include "rdev-ops.h"
  26
  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 /* returns ERR_PTR values */
  50 static struct wireless_dev *
  51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  52 {
  53         struct cfg80211_registered_device *rdev;
  54         struct wireless_dev *result = NULL;
  55         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  56         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  57         u64 wdev_id;
  58         int wiphy_idx = -1;
  59         int ifidx = -1;
  60
  61         assert_cfg80211_lock();
  62
  63         if (!have_ifidx && !have_wdev_id)
  64                 return ERR_PTR(-EINVAL);
  65
  66         if (have_ifidx)
  67                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  68         if (have_wdev_id) {
  69                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  70                 wiphy_idx = wdev_id >> 32;
  71         }
  72
  73         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  74                 struct wireless_dev *wdev;
  75
  76                 if (wiphy_net(&rdev->wiphy) != netns)
  77                         continue;
  78
  79                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  80                         continue;
  81
  82                 mutex_lock(&rdev->devlist_mtx);
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94                 mutex_unlock(&rdev->devlist_mtx);
  95
  96                 if (result)
  97                         break;
  98         }
  99
 100         if (result)
 101                 return result;
 102         return ERR_PTR(-ENODEV);
 103 }
 104
 105 static struct cfg80211_registered_device *
 106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 107 {
 108         struct cfg80211_registered_device *rdev = NULL, *tmp;
 109         struct net_device *netdev;
 110
 111         assert_cfg80211_lock();
 112
 113         if (!attrs[NL80211_ATTR_WIPHY] &&
 114             !attrs[NL80211_ATTR_IFINDEX] &&
 115             !attrs[NL80211_ATTR_WDEV])
 116                 return ERR_PTR(-EINVAL);
 117
 118         if (attrs[NL80211_ATTR_WIPHY])
 119                 rdev = cfg80211_rdev_by_wiphy_idx(
 120                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 121
 122         if (attrs[NL80211_ATTR_WDEV]) {
 123                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 124                 struct wireless_dev *wdev;
 125                 bool found = false;
 126
 127                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 128                 if (tmp) {
 129                         /* make sure wdev exists */
 130                         mutex_lock(&tmp->devlist_mtx);
 131                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 132                                 if (wdev->identifier != (u32)wdev_id)
 133                                         continue;
 134                                 found = true;
 135                                 break;
 136                         }
 137                         mutex_unlock(&tmp->devlist_mtx);
 138
 139                         if (!found)
 140                                 tmp = NULL;
 141
 142                         if (rdev && tmp != rdev)
 143                                 return ERR_PTR(-EINVAL);
 144                         rdev = tmp;
 145                 }
 146         }
 147
 148         if (attrs[NL80211_ATTR_IFINDEX]) {
 149                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 150                 netdev = dev_get_by_index(netns, ifindex);
 151                 if (netdev) {
 152                         if (netdev->ieee80211_ptr)
 153                                 tmp = wiphy_to_dev(
 154                                                 netdev->ieee80211_ptr->wiphy);
 155                         else
 156                                 tmp = NULL;
 157
 158                         dev_put(netdev);
 159
 160                         /* not wireless device -- return error */
 161                         if (!tmp)
 162                                 return ERR_PTR(-EINVAL);
 163
 164                         /* mismatch -- return error */
 165                         if (rdev && tmp != rdev)
 166                                 return ERR_PTR(-EINVAL);
 167
 168                         rdev = tmp;
 169                 }
 170         }
 171
 172         if (!rdev)
 173                 return ERR_PTR(-ENODEV);
 174
 175         if (netns != wiphy_net(&rdev->wiphy))
 176                 return ERR_PTR(-ENODEV);
 177
 178         return rdev;
 179 }
 180
 181 /*
 182  * This function returns a pointer to the driver
 183  * that the genl_info item that is passed refers to.
 184  * If successful, it returns non-NULL and also locks
 185  * the driver's mutex!
 186  *
 187  * This means that you need to call cfg80211_unlock_rdev()
 188  * before being allowed to acquire &cfg80211_mutex!
 189  *
 190  * This is necessary because we need to lock the global
 191  * mutex to get an item off the list safely, and then
 192  * we lock the rdev mutex so it doesn't go away under us.
 193  *
 194  * We don't want to keep cfg80211_mutex locked
 195  * for all the time in order to allow requests on
 196  * other interfaces to go through at the same time.
 197  *
 198  * The result of this can be a PTR_ERR and hence must
 199  * be checked with IS_ERR() for errors.
 200  */
 201 static struct cfg80211_registered_device *
 202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 203 {
 204         struct cfg80211_registered_device *rdev;
 205
 206         mutex_lock(&cfg80211_mutex);
 207         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 208
 209         /* if it is not an error we grab the lock on
 210          * it to assure it won't be going away while
 211          * we operate on it */
 212         if (!IS_ERR(rdev))
 213                 mutex_lock(&rdev->mtx);
 214
 215         mutex_unlock(&cfg80211_mutex);
 216
 217         return rdev;
 218 }
 219
 220 /* policy for the attributes */
 221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 222         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 223         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 224                                       .len = 20-1 },
 225         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 226
 227         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 229         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 232
 233         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 234         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 236         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 238
 239         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 240         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 242
 243         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 244         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 245
 246         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 247         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 248                                     .len = WLAN_MAX_KEY_LEN },
 249         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 250         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 251         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 252         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 253         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 256         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 257         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 258                                        .len = IEEE80211_MAX_DATA_LEN },
 259         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 260                                        .len = IEEE80211_MAX_DATA_LEN },
 261         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 262         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 264         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 265                                                .len = NL80211_MAX_SUPP_RATES },
 266         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 267         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 268         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 269         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 270                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 271         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 272
 273         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 274         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 277         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 280                                            .len = NL80211_MAX_SUPP_RATES },
 281         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 282
 283         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 285
 286         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 287
 288         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 289         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 290                               .len = IEEE80211_MAX_DATA_LEN },
 291         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 292         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 293
 294         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 295                                 .len = IEEE80211_MAX_SSID_LEN },
 296         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 297         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_STA_FLAGS2] = {
 302                 .len = sizeof(struct nl80211_sta_flag_update),
 303         },
 304         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 306         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 307         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 310         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 311         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 312         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 313                                  .len = WLAN_PMKID_LEN },
 314         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 315         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 316         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 318                                  .len = IEEE80211_MAX_DATA_LEN },
 319         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 320         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 321         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 322         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 326         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 327         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 330         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 334         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 335         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 338         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 339                                          .len = IEEE80211_MAX_DATA_LEN },
 340         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 341                                          .len = IEEE80211_MAX_DATA_LEN },
 342         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 344         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 346         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 352                                       .len = IEEE80211_MAX_DATA_LEN },
 353         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 354         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 355         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 356                 .len = NL80211_HT_CAPABILITY_LEN
 357         },
 358         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 359         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 360         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 361         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 362         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 363         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 364         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 365         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 366         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 367         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 368 };
 369
 370 /* policy for the key attributes */
 371 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 372         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 373         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 374         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 375         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 376         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 377         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 378         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 379         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 380 };
 381
 382 /* policy for the key default flags */
 383 static const struct nla_policy
 384 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 385         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 386         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 387 };
 388
 389 /* policy for WoWLAN attributes */
 390 static const struct nla_policy
 391 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 392         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 394         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 396         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for GTK rekey offload attributes */
 403 static const struct nla_policy
 404 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 405         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 406         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 407         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 408 };
 409
 410 static const struct nla_policy
 411 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 413                                                  .len = IEEE80211_MAX_SSID_LEN },
 414         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 415 };
 416
 417 /* ifidx get helper */
 418 static int nl80211_get_ifidx(struct netlink_callback *cb)
 419 {
 420         int res;
 421
 422         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 423                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 424                           nl80211_policy);
 425         if (res)
 426                 return res;
 427
 428         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 429                 return -EINVAL;
 430
 431         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 432         if (!res)
 433                 return -EINVAL;
 434         return res;
 435 }
 436
 437 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 438                                        struct netlink_callback *cb,
 439                                        struct cfg80211_registered_device **rdev,
 440                                        struct net_device **dev)
 441 {
 442         int ifidx = cb->args[0];
 443         int err;
 444
 445         if (!ifidx)
 446                 ifidx = nl80211_get_ifidx(cb);
 447         if (ifidx < 0)
 448                 return ifidx;
 449
 450         cb->args[0] = ifidx;
 451
 452         rtnl_lock();
 453
 454         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 455         if (!*dev) {
 456                 err = -ENODEV;
 457                 goto out_rtnl;
 458         }
 459
 460         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 461         if (IS_ERR(*rdev)) {
 462                 err = PTR_ERR(*rdev);
 463                 goto out_rtnl;
 464         }
 465
 466         return 0;
 467  out_rtnl:
 468         rtnl_unlock();
 469         return err;
 470 }
 471
 472 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 473 {
 474         cfg80211_unlock_rdev(rdev);
 475         rtnl_unlock();
 476 }
 477
 478 /* IE validation */
 479 static bool is_valid_ie_attr(const struct nlattr *attr)
 480 {
 481         const u8 *pos;
 482         int len;
 483
 484         if (!attr)
 485                 return true;
 486
 487         pos = nla_data(attr);
 488         len = nla_len(attr);
 489
 490         while (len) {
 491                 u8 elemlen;
 492
 493                 if (len < 2)
 494                         return false;
 495                 len -= 2;
 496
 497                 elemlen = pos[1];
 498                 if (elemlen > len)
 499                         return false;
 500
 501                 len -= elemlen;
 502                 pos += 2 + elemlen;
 503         }
 504
 505         return true;
 506 }
 507
 508 /* message building helper */
 509 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 510                                    int flags, u8 cmd)
 511 {
 512         /* since there is no private header just add the generic one */
 513         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 514 }
 515
 516 static int nl80211_msg_put_channel(struct sk_buff *msg,
 517                                    struct ieee80211_channel *chan)
 518 {
 519         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 520                         chan->center_freq))
 521                 goto nla_put_failure;
 522
 523         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 524             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 525                 goto nla_put_failure;
 526         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 527             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 528                 goto nla_put_failure;
 529         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 530             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 531                 goto nla_put_failure;
 532         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 533             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 534                 goto nla_put_failure;
 535
 536         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 537                         DBM_TO_MBM(chan->max_power)))
 538                 goto nla_put_failure;
 539
 540         return 0;
 541
 542  nla_put_failure:
 543         return -ENOBUFS;
 544 }
 545
 546 /* netlink command implementations */
 547
 548 struct key_parse {
 549         struct key_params p;
 550         int idx;
 551         int type;
 552         bool def, defmgmt;
 553         bool def_uni, def_multi;
 554 };
 555
 556 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 557 {
 558         struct nlattr *tb[NL80211_KEY_MAX + 1];
 559         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 560                                    nl80211_key_policy);
 561         if (err)
 562                 return err;
 563
 564         k->def = !!tb[NL80211_KEY_DEFAULT];
 565         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 566
 567         if (k->def) {
 568                 k->def_uni = true;
 569                 k->def_multi = true;
 570         }
 571         if (k->defmgmt)
 572                 k->def_multi = true;
 573
 574         if (tb[NL80211_KEY_IDX])
 575                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 576
 577         if (tb[NL80211_KEY_DATA]) {
 578                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 579                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 580         }
 581
 582         if (tb[NL80211_KEY_SEQ]) {
 583                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 584                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 585         }
 586
 587         if (tb[NL80211_KEY_CIPHER])
 588                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 589
 590         if (tb[NL80211_KEY_TYPE]) {
 591                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 592                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 593                         return -EINVAL;
 594         }
 595
 596         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 597                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 598                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 599                                        tb[NL80211_KEY_DEFAULT_TYPES],
 600                                        nl80211_key_default_policy);
 601                 if (err)
 602                         return err;
 603
 604                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 605                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 606         }
 607
 608         return 0;
 609 }
 610
 611 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 612 {
 613         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 614                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 615                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 616         }
 617
 618         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 619                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 620                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 621         }
 622
 623         if (info->attrs[NL80211_ATTR_KEY_IDX])
 624                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 625
 626         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 627                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 628
 629         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 630         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 631
 632         if (k->def) {
 633                 k->def_uni = true;
 634                 k->def_multi = true;
 635         }
 636         if (k->defmgmt)
 637                 k->def_multi = true;
 638
 639         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 640                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 641                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 642                         return -EINVAL;
 643         }
 644
 645         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 646                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 647                 int err = nla_parse_nested(
 648                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 649                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 650                                 nl80211_key_default_policy);
 651                 if (err)
 652                         return err;
 653
 654                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 655                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 656         }
 657
 658         return 0;
 659 }
 660
 661 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 662 {
 663         int err;
 664
 665         memset(k, 0, sizeof(*k));
 666         k->idx = -1;
 667         k->type = -1;
 668
 669         if (info->attrs[NL80211_ATTR_KEY])
 670                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 671         else
 672                 err = nl80211_parse_key_old(info, k);
 673
 674         if (err)
 675                 return err;
 676
 677         if (k->def && k->defmgmt)
 678                 return -EINVAL;
 679
 680         if (k->defmgmt) {
 681                 if (k->def_uni || !k->def_multi)
 682                         return -EINVAL;
 683         }
 684
 685         if (k->idx != -1) {
 686                 if (k->defmgmt) {
 687                         if (k->idx < 4 || k->idx > 5)
 688                                 return -EINVAL;
 689                 } else if (k->def) {
 690                         if (k->idx < 0 || k->idx > 3)
 691                                 return -EINVAL;
 692                 } else {
 693                         if (k->idx < 0 || k->idx > 5)
 694                                 return -EINVAL;
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 static struct cfg80211_cached_keys *
 702 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 703                        struct nlattr *keys, bool *no_ht)
 704 {
 705         struct key_parse parse;
 706         struct nlattr *key;
 707         struct cfg80211_cached_keys *result;
 708         int rem, err, def = 0;
 709
 710         result = kzalloc(sizeof(*result), GFP_KERNEL);
 711         if (!result)
 712                 return ERR_PTR(-ENOMEM);
 713
 714         result->def = -1;
 715         result->defmgmt = -1;
 716
 717         nla_for_each_nested(key, keys, rem) {
 718                 memset(&parse, 0, sizeof(parse));
 719                 parse.idx = -1;
 720
 721                 err = nl80211_parse_key_new(key, &parse);
 722                 if (err)
 723                         goto error;
 724                 err = -EINVAL;
 725                 if (!parse.p.key)
 726                         goto error;
 727                 if (parse.idx < 0 || parse.idx > 4)
 728                         goto error;
 729                 if (parse.def) {
 730                         if (def)
 731                                 goto error;
 732                         def = 1;
 733                         result->def = parse.idx;
 734                         if (!parse.def_uni || !parse.def_multi)
 735                                 goto error;
 736                 } else if (parse.defmgmt)
 737                         goto error;
 738                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 739                                                      parse.idx, false, NULL);
 740                 if (err)
 741                         goto error;
 742                 result->params[parse.idx].cipher = parse.p.cipher;
 743                 result->params[parse.idx].key_len = parse.p.key_len;
 744                 result->params[parse.idx].key = result->data[parse.idx];
 745                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 746
 747                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 748                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 749                         if (no_ht)
 750                                 *no_ht = true;
 751                 }
 752         }
 753
 754         return result;
 755  error:
 756         kfree(result);
 757         return ERR_PTR(err);
 758 }
 759
 760 static int nl80211_key_allowed(struct wireless_dev *wdev)
 761 {
 762         ASSERT_WDEV_LOCK(wdev);
 763
 764         switch (wdev->iftype) {
 765         case NL80211_IFTYPE_AP:
 766         case NL80211_IFTYPE_AP_VLAN:
 767         case NL80211_IFTYPE_P2P_GO:
 768         case NL80211_IFTYPE_MESH_POINT:
 769                 break;
 770         case NL80211_IFTYPE_ADHOC:
 771                 if (!wdev->current_bss)
 772                         return -ENOLINK;
 773                 break;
 774         case NL80211_IFTYPE_STATION:
 775         case NL80211_IFTYPE_P2P_CLIENT:
 776                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 777                         return -ENOLINK;
 778                 break;
 779         default:
 780                 return -EINVAL;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 787 {
 788         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 789         int i;
 790
 791         if (!nl_modes)
 792                 goto nla_put_failure;
 793
 794         i = 0;
 795         while (ifmodes) {
 796                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 797                         goto nla_put_failure;
 798                 ifmodes >>= 1;
 799                 i++;
 800         }
 801
 802         nla_nest_end(msg, nl_modes);
 803         return 0;
 804
 805 nla_put_failure:
 806         return -ENOBUFS;
 807 }
 808
 809 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 810                                           struct sk_buff *msg)
 811 {
 812         struct nlattr *nl_combis;
 813         int i, j;
 814
 815         nl_combis = nla_nest_start(msg,
 816                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 817         if (!nl_combis)
 818                 goto nla_put_failure;
 819
 820         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 821                 const struct ieee80211_iface_combination *c;
 822                 struct nlattr *nl_combi, *nl_limits;
 823
 824                 c = &wiphy->iface_combinations[i];
 825
 826                 nl_combi = nla_nest_start(msg, i + 1);
 827                 if (!nl_combi)
 828                         goto nla_put_failure;
 829
 830                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 831                 if (!nl_limits)
 832                         goto nla_put_failure;
 833
 834                 for (j = 0; j < c->n_limits; j++) {
 835                         struct nlattr *nl_limit;
 836
 837                         nl_limit = nla_nest_start(msg, j + 1);
 838                         if (!nl_limit)
 839                                 goto nla_put_failure;
 840                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 841                                         c->limits[j].max))
 842                                 goto nla_put_failure;
 843                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 844                                                 c->limits[j].types))
 845                                 goto nla_put_failure;
 846                         nla_nest_end(msg, nl_limit);
 847                 }
 848
 849                 nla_nest_end(msg, nl_limits);
 850
 851                 if (c->beacon_int_infra_match &&
 852                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 853                         goto nla_put_failure;
 854                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 855                                 c->num_different_channels) ||
 856                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 857                                 c->max_interfaces))
 858                         goto nla_put_failure;
 859
 860                 nla_nest_end(msg, nl_combi);
 861         }
 862
 863         nla_nest_end(msg, nl_combis);
 864
 865         return 0;
 866 nla_put_failure:
 867         return -ENOBUFS;
 868 }
 869
 870 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 871                               struct cfg80211_registered_device *dev)
 872 {
 873         void *hdr;
 874         struct nlattr *nl_bands, *nl_band;
 875         struct nlattr *nl_freqs, *nl_freq;
 876         struct nlattr *nl_rates, *nl_rate;
 877         struct nlattr *nl_cmds;
 878         enum ieee80211_band band;
 879         struct ieee80211_channel *chan;
 880         struct ieee80211_rate *rate;
 881         int i;
 882         const struct ieee80211_txrx_stypes *mgmt_stypes =
 883                                 dev->wiphy.mgmt_stypes;
 884
 885         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 886         if (!hdr)
 887                 return -1;
 888
 889         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 890             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 891             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 892                         cfg80211_rdev_list_generation) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 894                        dev->wiphy.retry_short) ||
 895             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 896                        dev->wiphy.retry_long) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 898                         dev->wiphy.frag_threshold) ||
 899             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 900                         dev->wiphy.rts_threshold) ||
 901             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 902                        dev->wiphy.coverage_class) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 904                        dev->wiphy.max_scan_ssids) ||
 905             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 906                        dev->wiphy.max_sched_scan_ssids) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 908                         dev->wiphy.max_scan_ie_len) ||
 909             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 910                         dev->wiphy.max_sched_scan_ie_len) ||
 911             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 912                        dev->wiphy.max_match_sets))
 913                 goto nla_put_failure;
 914
 915         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 916             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 917                 goto nla_put_failure;
 918         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 919             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 920                 goto nla_put_failure;
 921         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 922             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 923                 goto nla_put_failure;
 924         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 925             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 926                 goto nla_put_failure;
 927         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 928             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 929                 goto nla_put_failure;
 930         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 931             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 932                 goto nla_put_failure;
 933
 934         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 935                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 936                     dev->wiphy.cipher_suites))
 937                 goto nla_put_failure;
 938
 939         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 940                        dev->wiphy.max_num_pmkids))
 941                 goto nla_put_failure;
 942
 943         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 944             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 945                 goto nla_put_failure;
 946
 947         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 948                         dev->wiphy.available_antennas_tx) ||
 949             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 950                         dev->wiphy.available_antennas_rx))
 951                 goto nla_put_failure;
 952
 953         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 954             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 955                         dev->wiphy.probe_resp_offload))
 956                 goto nla_put_failure;
 957
 958         if ((dev->wiphy.available_antennas_tx ||
 959              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 960                 u32 tx_ant = 0, rx_ant = 0;
 961                 int res;
 962                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 963                 if (!res) {
 964                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 965                                         tx_ant) ||
 966                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 967                                         rx_ant))
 968                                 goto nla_put_failure;
 969                 }
 970         }
 971
 972         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 973                                 dev->wiphy.interface_modes))
 974                 goto nla_put_failure;
 975
 976         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 977         if (!nl_bands)
 978                 goto nla_put_failure;
 979
 980         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 981                 if (!dev->wiphy.bands[band])
 982                         continue;
 983
 984                 nl_band = nla_nest_start(msg, band);
 985                 if (!nl_band)
 986                         goto nla_put_failure;
 987
 988                 /* add HT info */
 989                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 990                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 991                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 992                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 993                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 994                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 997                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 998                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 999                         goto nla_put_failure;
1000
1001                 /* add VHT info */
1002                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1003                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1004                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1005                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1006                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1007                                  dev->wiphy.bands[band]->vht_cap.cap)))
1008                         goto nla_put_failure;
1009
1010                 /* add frequencies */
1011                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1012                 if (!nl_freqs)
1013                         goto nla_put_failure;
1014
1015                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1016                         nl_freq = nla_nest_start(msg, i);
1017                         if (!nl_freq)
1018                                 goto nla_put_failure;
1019
1020                         chan = &dev->wiphy.bands[band]->channels[i];
1021
1022                         if (nl80211_msg_put_channel(msg, chan))
1023                                 goto nla_put_failure;
1024
1025                         nla_nest_end(msg, nl_freq);
1026                 }
1027
1028                 nla_nest_end(msg, nl_freqs);
1029
1030                 /* add bitrates */
1031                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1032                 if (!nl_rates)
1033                         goto nla_put_failure;
1034
1035                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1036                         nl_rate = nla_nest_start(msg, i);
1037                         if (!nl_rate)
1038                                 goto nla_put_failure;
1039
1040                         rate = &dev->wiphy.bands[band]->bitrates[i];
1041                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1042                                         rate->bitrate))
1043                                 goto nla_put_failure;
1044                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1045                             nla_put_flag(msg,
1046                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1047                                 goto nla_put_failure;
1048
1049                         nla_nest_end(msg, nl_rate);
1050                 }
1051
1052                 nla_nest_end(msg, nl_rates);
1053
1054                 nla_nest_end(msg, nl_band);
1055         }
1056         nla_nest_end(msg, nl_bands);
1057
1058         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1059         if (!nl_cmds)
1060                 goto nla_put_failure;
1061
1062         i = 0;
1063 #define CMD(op, n)                                              \
1064          do {                                                   \
1065                 if (dev->ops->op) {                             \
1066                         i++;                                    \
1067                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1068                                 goto nla_put_failure;           \
1069                 }                                               \
1070         } while (0)
1071
1072         CMD(add_virtual_intf, NEW_INTERFACE);
1073         CMD(change_virtual_intf, SET_INTERFACE);
1074         CMD(add_key, NEW_KEY);
1075         CMD(start_ap, START_AP);
1076         CMD(add_station, NEW_STATION);
1077         CMD(add_mpath, NEW_MPATH);
1078         CMD(update_mesh_config, SET_MESH_CONFIG);
1079         CMD(change_bss, SET_BSS);
1080         CMD(auth, AUTHENTICATE);
1081         CMD(assoc, ASSOCIATE);
1082         CMD(deauth, DEAUTHENTICATE);
1083         CMD(disassoc, DISASSOCIATE);
1084         CMD(join_ibss, JOIN_IBSS);
1085         CMD(join_mesh, JOIN_MESH);
1086         CMD(set_pmksa, SET_PMKSA);
1087         CMD(del_pmksa, DEL_PMKSA);
1088         CMD(flush_pmksa, FLUSH_PMKSA);
1089         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1090                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1091         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1092         CMD(mgmt_tx, FRAME);
1093         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1094         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1095                 i++;
1096                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1097                         goto nla_put_failure;
1098         }
1099         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1100             dev->ops->join_mesh) {
1101                 i++;
1102                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1103                         goto nla_put_failure;
1104         }
1105         CMD(set_wds_peer, SET_WDS_PEER);
1106         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1107                 CMD(tdls_mgmt, TDLS_MGMT);
1108                 CMD(tdls_oper, TDLS_OPER);
1109         }
1110         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1111                 CMD(sched_scan_start, START_SCHED_SCAN);
1112         CMD(probe_client, PROBE_CLIENT);
1113         CMD(set_noack_map, SET_NOACK_MAP);
1114         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1115                 i++;
1116                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1117                         goto nla_put_failure;
1118         }
1119         CMD(start_p2p_device, START_P2P_DEVICE);
1120         CMD(set_mcast_rate, SET_MCAST_RATE);
1121
1122 #ifdef CONFIG_NL80211_TESTMODE
1123         CMD(testmode_cmd, TESTMODE);
1124 #endif
1125
1126 #undef CMD
1127
1128         if (dev->ops->connect || dev->ops->auth) {
1129                 i++;
1130                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1131                         goto nla_put_failure;
1132         }
1133
1134         if (dev->ops->disconnect || dev->ops->deauth) {
1135                 i++;
1136                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1137                         goto nla_put_failure;
1138         }
1139
1140         nla_nest_end(msg, nl_cmds);
1141
1142         if (dev->ops->remain_on_channel &&
1143             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1144             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1145                         dev->wiphy.max_remain_on_channel_duration))
1146                 goto nla_put_failure;
1147
1148         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1149             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1150                 goto nla_put_failure;
1151
1152         if (mgmt_stypes) {
1153                 u16 stypes;
1154                 struct nlattr *nl_ftypes, *nl_ifs;
1155                 enum nl80211_iftype ift;
1156
1157                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1158                 if (!nl_ifs)
1159                         goto nla_put_failure;
1160
1161                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1162                         nl_ftypes = nla_nest_start(msg, ift);
1163                         if (!nl_ftypes)
1164                                 goto nla_put_failure;
1165                         i = 0;
1166                         stypes = mgmt_stypes[ift].tx;
1167                         while (stypes) {
1168                                 if ((stypes & 1) &&
1169                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1170                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1171                                         goto nla_put_failure;
1172                                 stypes >>= 1;
1173                                 i++;
1174                         }
1175                         nla_nest_end(msg, nl_ftypes);
1176                 }
1177
1178                 nla_nest_end(msg, nl_ifs);
1179
1180                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1181                 if (!nl_ifs)
1182                         goto nla_put_failure;
1183
1184                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1185                         nl_ftypes = nla_nest_start(msg, ift);
1186                         if (!nl_ftypes)
1187                                 goto nla_put_failure;
1188                         i = 0;
1189                         stypes = mgmt_stypes[ift].rx;
1190                         while (stypes) {
1191                                 if ((stypes & 1) &&
1192                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1193                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1194                                         goto nla_put_failure;
1195                                 stypes >>= 1;
1196                                 i++;
1197                         }
1198                         nla_nest_end(msg, nl_ftypes);
1199                 }
1200                 nla_nest_end(msg, nl_ifs);
1201         }
1202
1203 #ifdef CONFIG_PM
1204         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1205                 struct nlattr *nl_wowlan;
1206
1207                 nl_wowlan = nla_nest_start(msg,
1208                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1209                 if (!nl_wowlan)
1210                         goto nla_put_failure;
1211
1212                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1226                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1228                     goto nla_put_failure;
1229                 if (dev->wiphy.wowlan.n_patterns) {
1230                         struct nl80211_wowlan_pattern_support pat = {
1231                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1232                                 .min_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_min_len,
1234                                 .max_pattern_len =
1235                                         dev->wiphy.wowlan.pattern_max_len,
1236                         };
1237                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1238                                     sizeof(pat), &pat))
1239                                 goto nla_put_failure;
1240                 }
1241
1242                 nla_nest_end(msg, nl_wowlan);
1243         }
1244 #endif
1245
1246         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1247                                 dev->wiphy.software_iftypes))
1248                 goto nla_put_failure;
1249
1250         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1251                 goto nla_put_failure;
1252
1253         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1254             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1255                         dev->wiphy.ap_sme_capa))
1256                 goto nla_put_failure;
1257
1258         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1259                         dev->wiphy.features))
1260                 goto nla_put_failure;
1261
1262         if (dev->wiphy.ht_capa_mod_mask &&
1263             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1264                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1265                     dev->wiphy.ht_capa_mod_mask))
1266                 goto nla_put_failure;
1267
1268         return genlmsg_end(msg, hdr);
1269
1270  nla_put_failure:
1271         genlmsg_cancel(msg, hdr);
1272         return -EMSGSIZE;
1273 }
1274
1275 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1276 {
1277         int idx = 0;
1278         int start = cb->args[0];
1279         struct cfg80211_registered_device *dev;
1280
1281         mutex_lock(&cfg80211_mutex);
1282         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1283                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1284                         continue;
1285                 if (++idx <= start)
1286                         continue;
1287                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1288                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1289                                        dev) < 0) {
1290                         idx--;
1291                         break;
1292                 }
1293         }
1294         mutex_unlock(&cfg80211_mutex);
1295
1296         cb->args[0] = idx;
1297
1298         return skb->len;
1299 }
1300
1301 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1302 {
1303         struct sk_buff *msg;
1304         struct cfg80211_registered_device *dev = info->user_ptr[0];
1305
1306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307         if (!msg)
1308                 return -ENOMEM;
1309
1310         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1311                 nlmsg_free(msg);
1312                 return -ENOBUFS;
1313         }
1314
1315         return genlmsg_reply(msg, info);
1316 }
1317
1318 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1319         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1320         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1322         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1323         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1324 };
1325
1326 static int parse_txq_params(struct nlattr *tb[],
1327                             struct ieee80211_txq_params *txq_params)
1328 {
1329         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1330             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1331             !tb[NL80211_TXQ_ATTR_AIFS])
1332                 return -EINVAL;
1333
1334         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1335         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1336         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1337         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1338         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1339
1340         if (txq_params->ac >= NL80211_NUM_ACS)
1341                 return -EINVAL;
1342
1343         return 0;
1344 }
1345
1346 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1347 {
1348         /*
1349          * You can only set the channel explicitly for WDS interfaces,
1350          * all others have their channel managed via their respective
1351          * "establish a connection" command (connect, join, ...)
1352          *
1353          * For AP/GO and mesh mode, the channel can be set with the
1354          * channel userspace API, but is only stored and passed to the
1355          * low-level driver when the AP starts or the mesh is joined.
1356          * This is for backward compatibility, userspace can also give
1357          * the channel in the start-ap or join-mesh commands instead.
1358          *
1359          * Monitors are special as they are normally slaved to
1360          * whatever else is going on, so they have their own special
1361          * operation to set the monitor channel if possible.
1362          */
1363         return !wdev ||
1364                 wdev->iftype == NL80211_IFTYPE_AP ||
1365                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1366                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1367                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1368 }
1369
1370 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1371                                  struct genl_info *info,
1372                                  struct cfg80211_chan_def *chandef)
1373 {
1374         u32 control_freq;
1375
1376         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1377                 return -EINVAL;
1378
1379         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1380
1381         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1382         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1383         chandef->center_freq1 = control_freq;
1384         chandef->center_freq2 = 0;
1385
1386         /* Primary channel not allowed */
1387         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1388                 return -EINVAL;
1389
1390         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1391                 enum nl80211_channel_type chantype;
1392
1393                 chantype = nla_get_u32(
1394                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1395
1396                 switch (chantype) {
1397                 case NL80211_CHAN_NO_HT:
1398                 case NL80211_CHAN_HT20:
1399                 case NL80211_CHAN_HT40PLUS:
1400                 case NL80211_CHAN_HT40MINUS:
1401                         cfg80211_chandef_create(chandef, chandef->chan,
1402                                                 chantype);
1403                         break;
1404                 default:
1405                         return -EINVAL;
1406                 }
1407         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1408                 chandef->width =
1409                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1410                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1411                         chandef->center_freq1 =
1412                                 nla_get_u32(
1413                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1414                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1415                         chandef->center_freq2 =
1416                                 nla_get_u32(
1417                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1418         }
1419
1420         if (!cfg80211_chandef_valid(chandef))
1421                 return -EINVAL;
1422
1423         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1424                                      IEEE80211_CHAN_DISABLED))
1425                 return -EINVAL;
1426
1427         return 0;
1428 }
1429
1430 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1431                                  struct wireless_dev *wdev,
1432                                  struct genl_info *info)
1433 {
1434         struct cfg80211_chan_def chandef;
1435         int result;
1436         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1437
1438         if (wdev)
1439                 iftype = wdev->iftype;
1440
1441         if (!nl80211_can_set_dev_channel(wdev))
1442                 return -EOPNOTSUPP;
1443
1444         result = nl80211_parse_chandef(rdev, info, &chandef);
1445         if (result)
1446                 return result;
1447
1448         mutex_lock(&rdev->devlist_mtx);
1449         switch (iftype) {
1450         case NL80211_IFTYPE_AP:
1451         case NL80211_IFTYPE_P2P_GO:
1452                 if (wdev->beacon_interval) {
1453                         result = -EBUSY;
1454                         break;
1455                 }
1456                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1457                         result = -EINVAL;
1458                         break;
1459                 }
1460                 wdev->preset_chandef = chandef;
1461                 result = 0;
1462                 break;
1463         case NL80211_IFTYPE_MESH_POINT:
1464                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1465                 break;
1466         case NL80211_IFTYPE_MONITOR:
1467                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1468                 break;
1469         default:
1470                 result = -EINVAL;
1471         }
1472         mutex_unlock(&rdev->devlist_mtx);
1473
1474         return result;
1475 }
1476
1477 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1478 {
1479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1480         struct net_device *netdev = info->user_ptr[1];
1481
1482         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1483 }
1484
1485 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1486 {
1487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1488         struct net_device *dev = info->user_ptr[1];
1489         struct wireless_dev *wdev = dev->ieee80211_ptr;
1490         const u8 *bssid;
1491
1492         if (!info->attrs[NL80211_ATTR_MAC])
1493                 return -EINVAL;
1494
1495         if (netif_running(dev))
1496                 return -EBUSY;
1497
1498         if (!rdev->ops->set_wds_peer)
1499                 return -EOPNOTSUPP;
1500
1501         if (wdev->iftype != NL80211_IFTYPE_WDS)
1502                 return -EOPNOTSUPP;
1503
1504         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1505         return rdev_set_wds_peer(rdev, dev, bssid);
1506 }
1507
1508
1509 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1510 {
1511         struct cfg80211_registered_device *rdev;
1512         struct net_device *netdev = NULL;
1513         struct wireless_dev *wdev;
1514         int result = 0, rem_txq_params = 0;
1515         struct nlattr *nl_txq_params;
1516         u32 changed;
1517         u8 retry_short = 0, retry_long = 0;
1518         u32 frag_threshold = 0, rts_threshold = 0;
1519         u8 coverage_class = 0;
1520
1521         /*
1522          * Try to find the wiphy and netdev. Normally this
1523          * function shouldn't need the netdev, but this is
1524          * done for backward compatibility -- previously
1525          * setting the channel was done per wiphy, but now
1526          * it is per netdev. Previous userland like hostapd
1527          * also passed a netdev to set_wiphy, so that it is
1528          * possible to let that go to the right netdev!
1529          */
1530         mutex_lock(&cfg80211_mutex);
1531
1532         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1533                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1534
1535                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1536                 if (netdev && netdev->ieee80211_ptr) {
1537                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1538                         mutex_lock(&rdev->mtx);
1539                 } else
1540                         netdev = NULL;
1541         }
1542
1543         if (!netdev) {
1544                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1545                                                   info->attrs);
1546                 if (IS_ERR(rdev)) {
1547                         mutex_unlock(&cfg80211_mutex);
1548                         return PTR_ERR(rdev);
1549                 }
1550                 wdev = NULL;
1551                 netdev = NULL;
1552                 result = 0;
1553
1554                 mutex_lock(&rdev->mtx);
1555         } else
1556                 wdev = netdev->ieee80211_ptr;
1557
1558         /*
1559          * end workaround code, by now the rdev is available
1560          * and locked, and wdev may or may not be NULL.
1561          */
1562
1563         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1564                 result = cfg80211_dev_rename(
1565                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1566
1567         mutex_unlock(&cfg80211_mutex);
1568
1569         if (result)
1570                 goto bad_res;
1571
1572         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1573                 struct ieee80211_txq_params txq_params;
1574                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1575
1576                 if (!rdev->ops->set_txq_params) {
1577                         result = -EOPNOTSUPP;
1578                         goto bad_res;
1579                 }
1580
1581                 if (!netdev) {
1582                         result = -EINVAL;
1583                         goto bad_res;
1584                 }
1585
1586                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1587                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1588                         result = -EINVAL;
1589                         goto bad_res;
1590                 }
1591
1592                 if (!netif_running(netdev)) {
1593                         result = -ENETDOWN;
1594                         goto bad_res;
1595                 }
1596
1597                 nla_for_each_nested(nl_txq_params,
1598                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1599                                     rem_txq_params) {
1600                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1601                                   nla_data(nl_txq_params),
1602                                   nla_len(nl_txq_params),
1603                                   txq_params_policy);
1604                         result = parse_txq_params(tb, &txq_params);
1605                         if (result)
1606                                 goto bad_res;
1607
1608                         result = rdev_set_txq_params(rdev, netdev,
1609                                                      &txq_params);
1610                         if (result)
1611                                 goto bad_res;
1612                 }
1613         }
1614
1615         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1616                 result = __nl80211_set_channel(rdev,
1617                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1618                                 info);
1619                 if (result)
1620                         goto bad_res;
1621         }
1622
1623         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1624                 struct wireless_dev *txp_wdev = wdev;
1625                 enum nl80211_tx_power_setting type;
1626                 int idx, mbm = 0;
1627
1628                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1629                         txp_wdev = NULL;
1630
1631                 if (!rdev->ops->set_tx_power) {
1632                         result = -EOPNOTSUPP;
1633                         goto bad_res;
1634                 }
1635
1636                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1637                 type = nla_get_u32(info->attrs[idx]);
1638
1639                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1640                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1641                         result = -EINVAL;
1642                         goto bad_res;
1643                 }
1644
1645                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1646                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1647                         mbm = nla_get_u32(info->attrs[idx]);
1648                 }
1649
1650                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1651                 if (result)
1652                         goto bad_res;
1653         }
1654
1655         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1656             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1657                 u32 tx_ant, rx_ant;
1658                 if ((!rdev->wiphy.available_antennas_tx &&
1659                      !rdev->wiphy.available_antennas_rx) ||
1660                     !rdev->ops->set_antenna) {
1661                         result = -EOPNOTSUPP;
1662                         goto bad_res;
1663                 }
1664
1665                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1666                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1667
1668                 /* reject antenna configurations which don't match the
1669                  * available antenna masks, except for the "all" mask */
1670                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1671                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1672                         result = -EINVAL;
1673                         goto bad_res;
1674                 }
1675
1676                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1677                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1678
1679                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1680                 if (result)
1681                         goto bad_res;
1682         }
1683
1684         changed = 0;
1685
1686         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1687                 retry_short = nla_get_u8(
1688                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1689                 if (retry_short == 0) {
1690                         result = -EINVAL;
1691                         goto bad_res;
1692                 }
1693                 changed |= WIPHY_PARAM_RETRY_SHORT;
1694         }
1695
1696         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1697                 retry_long = nla_get_u8(
1698                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1699                 if (retry_long == 0) {
1700                         result = -EINVAL;
1701                         goto bad_res;
1702                 }
1703                 changed |= WIPHY_PARAM_RETRY_LONG;
1704         }
1705
1706         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1707                 frag_threshold = nla_get_u32(
1708                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1709                 if (frag_threshold < 256) {
1710                         result = -EINVAL;
1711                         goto bad_res;
1712                 }
1713                 if (frag_threshold != (u32) -1) {
1714                         /*
1715                          * Fragments (apart from the last one) are required to
1716                          * have even length. Make the fragmentation code
1717                          * simpler by stripping LSB should someone try to use
1718                          * odd threshold value.
1719                          */
1720                         frag_threshold &= ~0x1;
1721                 }
1722                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1723         }
1724
1725         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1726                 rts_threshold = nla_get_u32(
1727                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1728                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1729         }
1730
1731         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1732                 coverage_class = nla_get_u8(
1733                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1734                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1735         }
1736
1737         if (changed) {
1738                 u8 old_retry_short, old_retry_long;
1739                 u32 old_frag_threshold, old_rts_threshold;
1740                 u8 old_coverage_class;
1741
1742                 if (!rdev->ops->set_wiphy_params) {
1743                         result = -EOPNOTSUPP;
1744                         goto bad_res;
1745                 }
1746
1747                 old_retry_short = rdev->wiphy.retry_short;
1748                 old_retry_long = rdev->wiphy.retry_long;
1749                 old_frag_threshold = rdev->wiphy.frag_threshold;
1750                 old_rts_threshold = rdev->wiphy.rts_threshold;
1751                 old_coverage_class = rdev->wiphy.coverage_class;
1752
1753                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1754                         rdev->wiphy.retry_short = retry_short;
1755                 if (changed & WIPHY_PARAM_RETRY_LONG)
1756                         rdev->wiphy.retry_long = retry_long;
1757                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1758                         rdev->wiphy.frag_threshold = frag_threshold;
1759                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1760                         rdev->wiphy.rts_threshold = rts_threshold;
1761                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1762                         rdev->wiphy.coverage_class = coverage_class;
1763
1764                 result = rdev_set_wiphy_params(rdev, changed);
1765                 if (result) {
1766                         rdev->wiphy.retry_short = old_retry_short;
1767                         rdev->wiphy.retry_long = old_retry_long;
1768                         rdev->wiphy.frag_threshold = old_frag_threshold;
1769                         rdev->wiphy.rts_threshold = old_rts_threshold;
1770                         rdev->wiphy.coverage_class = old_coverage_class;
1771                 }
1772         }
1773
1774  bad_res:
1775         mutex_unlock(&rdev->mtx);
1776         if (netdev)
1777                 dev_put(netdev);
1778         return result;
1779 }
1780
1781 static inline u64 wdev_id(struct wireless_dev *wdev)
1782 {
1783         return (u64)wdev->identifier |
1784                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1785 }
1786
1787 static int nl80211_send_chandef(struct sk_buff *msg,
1788                                  struct cfg80211_chan_def *chandef)
1789 {
1790         WARN_ON(!cfg80211_chandef_valid(chandef));
1791
1792         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1793                         chandef->chan->center_freq))
1794                 return -ENOBUFS;
1795         switch (chandef->width) {
1796         case NL80211_CHAN_WIDTH_20_NOHT:
1797         case NL80211_CHAN_WIDTH_20:
1798         case NL80211_CHAN_WIDTH_40:
1799                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1800                                 cfg80211_get_chandef_type(chandef)))
1801                         return -ENOBUFS;
1802                 break;
1803         default:
1804                 break;
1805         }
1806         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1807                 return -ENOBUFS;
1808         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1809                 return -ENOBUFS;
1810         if (chandef->center_freq2 &&
1811             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1812                 return -ENOBUFS;
1813         return 0;
1814 }
1815
1816 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1817                               struct cfg80211_registered_device *rdev,
1818                               struct wireless_dev *wdev)
1819 {
1820         struct net_device *dev = wdev->netdev;
1821         void *hdr;
1822
1823         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1824         if (!hdr)
1825                 return -1;
1826
1827         if (dev &&
1828             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1829              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1830                 goto nla_put_failure;
1831
1832         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1833             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1834             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1835             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1836             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1837                         rdev->devlist_generation ^
1838                         (cfg80211_rdev_list_generation << 2)))
1839                 goto nla_put_failure;
1840
1841         if (rdev->ops->get_channel) {
1842                 int ret;
1843                 struct cfg80211_chan_def chandef;
1844
1845                 ret = rdev_get_channel(rdev, wdev, &chandef);
1846                 if (ret == 0) {
1847                         if (nl80211_send_chandef(msg, &chandef))
1848                                 goto nla_put_failure;
1849                 }
1850         }
1851
1852         if (wdev->ssid_len) {
1853                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1854                         goto nla_put_failure;
1855         }
1856
1857         return genlmsg_end(msg, hdr);
1858
1859  nla_put_failure:
1860         genlmsg_cancel(msg, hdr);
1861         return -EMSGSIZE;
1862 }
1863
1864 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1865 {
1866         int wp_idx = 0;
1867         int if_idx = 0;
1868         int wp_start = cb->args[0];
1869         int if_start = cb->args[1];
1870         struct cfg80211_registered_device *rdev;
1871         struct wireless_dev *wdev;
1872
1873         mutex_lock(&cfg80211_mutex);
1874         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1875                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1876                         continue;
1877                 if (wp_idx < wp_start) {
1878                         wp_idx++;
1879                         continue;
1880                 }
1881                 if_idx = 0;
1882
1883                 mutex_lock(&rdev->devlist_mtx);
1884                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1885                         if (if_idx < if_start) {
1886                                 if_idx++;
1887                                 continue;
1888                         }
1889                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1890                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1891                                                rdev, wdev) < 0) {
1892                                 mutex_unlock(&rdev->devlist_mtx);
1893                                 goto out;
1894                         }
1895                         if_idx++;
1896                 }
1897                 mutex_unlock(&rdev->devlist_mtx);
1898
1899                 wp_idx++;
1900         }
1901  out:
1902         mutex_unlock(&cfg80211_mutex);
1903
1904         cb->args[0] = wp_idx;
1905         cb->args[1] = if_idx;
1906
1907         return skb->len;
1908 }
1909
1910 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1911 {
1912         struct sk_buff *msg;
1913         struct cfg80211_registered_device *dev = info->user_ptr[0];
1914         struct wireless_dev *wdev = info->user_ptr[1];
1915
1916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1917         if (!msg)
1918                 return -ENOMEM;
1919
1920         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1921                                dev, wdev) < 0) {
1922                 nlmsg_free(msg);
1923                 return -ENOBUFS;
1924         }
1925
1926         return genlmsg_reply(msg, info);
1927 }
1928
1929 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1930         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1931         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1932         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1933         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1934         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1935 };
1936
1937 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1938 {
1939         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1940         int flag;
1941
1942         *mntrflags = 0;
1943
1944         if (!nla)
1945                 return -EINVAL;
1946
1947         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1948                              nla, mntr_flags_policy))
1949                 return -EINVAL;
1950
1951         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1952                 if (flags[flag])
1953                         *mntrflags |= (1<<flag);
1954
1955         return 0;
1956 }
1957
1958 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1959                                struct net_device *netdev, u8 use_4addr,
1960                                enum nl80211_iftype iftype)
1961 {
1962         if (!use_4addr) {
1963                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1964                         return -EBUSY;
1965                 return 0;
1966         }
1967
1968         switch (iftype) {
1969         case NL80211_IFTYPE_AP_VLAN:
1970                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1971                         return 0;
1972                 break;
1973         case NL80211_IFTYPE_STATION:
1974                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1975                         return 0;
1976                 break;
1977         default:
1978                 break;
1979         }
1980
1981         return -EOPNOTSUPP;
1982 }
1983
1984 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1985 {
1986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1987         struct vif_params params;
1988         int err;
1989         enum nl80211_iftype otype, ntype;
1990         struct net_device *dev = info->user_ptr[1];
1991         u32 _flags, *flags = NULL;
1992         bool change = false;
1993
1994         memset(&params, 0, sizeof(params));
1995
1996         otype = ntype = dev->ieee80211_ptr->iftype;
1997
1998         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1999                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2000                 if (otype != ntype)
2001                         change = true;
2002                 if (ntype > NL80211_IFTYPE_MAX)
2003                         return -EINVAL;
2004         }
2005
2006         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2007                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2008
2009                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2010                         return -EINVAL;
2011                 if (netif_running(dev))
2012                         return -EBUSY;
2013
2014                 wdev_lock(wdev);
2015                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2016                              IEEE80211_MAX_MESH_ID_LEN);
2017                 wdev->mesh_id_up_len =
2018                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2019                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2020                        wdev->mesh_id_up_len);
2021                 wdev_unlock(wdev);
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_4ADDR]) {
2025                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2026                 change = true;
2027                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2028                 if (err)
2029                         return err;
2030         } else {
2031                 params.use_4addr = -1;
2032         }
2033
2034         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2035                 if (ntype != NL80211_IFTYPE_MONITOR)
2036                         return -EINVAL;
2037                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2038                                           &_flags);
2039                 if (err)
2040                         return err;
2041
2042                 flags = &_flags;
2043                 change = true;
2044         }
2045
2046         if (change)
2047                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2048         else
2049                 err = 0;
2050
2051         if (!err && params.use_4addr != -1)
2052                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2053
2054         return err;
2055 }
2056
2057 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2058 {
2059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2060         struct vif_params params;
2061         struct wireless_dev *wdev;
2062         struct sk_buff *msg;
2063         int err;
2064         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2065         u32 flags;
2066
2067         memset(&params, 0, sizeof(params));
2068
2069         if (!info->attrs[NL80211_ATTR_IFNAME])
2070                 return -EINVAL;
2071
2072         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2073                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2074                 if (type > NL80211_IFTYPE_MAX)
2075                         return -EINVAL;
2076         }
2077
2078         if (!rdev->ops->add_virtual_intf ||
2079             !(rdev->wiphy.interface_modes & (1 << type)))
2080                 return -EOPNOTSUPP;
2081
2082         if (info->attrs[NL80211_ATTR_4ADDR]) {
2083                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2084                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2085                 if (err)
2086                         return err;
2087         }
2088
2089         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2090         if (!msg)
2091                 return -ENOMEM;
2092
2093         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2094                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2095                                   &flags);
2096         wdev = rdev_add_virtual_intf(rdev,
2097                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2098                                 type, err ? NULL : &flags, &params);
2099         if (IS_ERR(wdev)) {
2100                 nlmsg_free(msg);
2101                 return PTR_ERR(wdev);
2102         }
2103
2104         switch (type) {
2105         case NL80211_IFTYPE_MESH_POINT:
2106                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2107                         break;
2108                 wdev_lock(wdev);
2109                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2110                              IEEE80211_MAX_MESH_ID_LEN);
2111                 wdev->mesh_id_up_len =
2112                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2113                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2114                        wdev->mesh_id_up_len);
2115                 wdev_unlock(wdev);
2116                 break;
2117         case NL80211_IFTYPE_P2P_DEVICE:
2118                 /*
2119                  * P2P Device doesn't have a netdev, so doesn't go
2120                  * through the netdev notifier and must be added here
2121                  */
2122                 mutex_init(&wdev->mtx);
2123                 INIT_LIST_HEAD(&wdev->event_list);
2124                 spin_lock_init(&wdev->event_lock);
2125                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2126                 spin_lock_init(&wdev->mgmt_registrations_lock);
2127
2128                 mutex_lock(&rdev->devlist_mtx);
2129                 wdev->identifier = ++rdev->wdev_id;
2130                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2131                 rdev->devlist_generation++;
2132                 mutex_unlock(&rdev->devlist_mtx);
2133                 break;
2134         default:
2135                 break;
2136         }
2137
2138         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2139                                rdev, wdev) < 0) {
2140                 nlmsg_free(msg);
2141                 return -ENOBUFS;
2142         }
2143
2144         return genlmsg_reply(msg, info);
2145 }
2146
2147 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2148 {
2149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2150         struct wireless_dev *wdev = info->user_ptr[1];
2151
2152         if (!rdev->ops->del_virtual_intf)
2153                 return -EOPNOTSUPP;
2154
2155         /*
2156          * If we remove a wireless device without a netdev then clear
2157          * user_ptr[1] so that nl80211_post_doit won't dereference it
2158          * to check if it needs to do dev_put(). Otherwise it crashes
2159          * since the wdev has been freed, unlike with a netdev where
2160          * we need the dev_put() for the netdev to really be freed.
2161          */
2162         if (!wdev->netdev)
2163                 info->user_ptr[1] = NULL;
2164
2165         return rdev_del_virtual_intf(rdev, wdev);
2166 }
2167
2168 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2169 {
2170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2171         struct net_device *dev = info->user_ptr[1];
2172         u16 noack_map;
2173
2174         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2175                 return -EINVAL;
2176
2177         if (!rdev->ops->set_noack_map)
2178                 return -EOPNOTSUPP;
2179
2180         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2181
2182         return rdev_set_noack_map(rdev, dev, noack_map);
2183 }
2184
2185 struct get_key_cookie {
2186         struct sk_buff *msg;
2187         int error;
2188         int idx;
2189 };
2190
2191 static void get_key_callback(void *c, struct key_params *params)
2192 {
2193         struct nlattr *key;
2194         struct get_key_cookie *cookie = c;
2195
2196         if ((params->key &&
2197              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2198                      params->key_len, params->key)) ||
2199             (params->seq &&
2200              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2201                      params->seq_len, params->seq)) ||
2202             (params->cipher &&
2203              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2204                          params->cipher)))
2205                 goto nla_put_failure;
2206
2207         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2208         if (!key)
2209                 goto nla_put_failure;
2210
2211         if ((params->key &&
2212              nla_put(cookie->msg, NL80211_KEY_DATA,
2213                      params->key_len, params->key)) ||
2214             (params->seq &&
2215              nla_put(cookie->msg, NL80211_KEY_SEQ,
2216                      params->seq_len, params->seq)) ||
2217             (params->cipher &&
2218              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2219                          params->cipher)))
2220                 goto nla_put_failure;
2221
2222         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2223                 goto nla_put_failure;
2224
2225         nla_nest_end(cookie->msg, key);
2226
2227         return;
2228  nla_put_failure:
2229         cookie->error = 1;
2230 }
2231
2232 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2233 {
2234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2235         int err;
2236         struct net_device *dev = info->user_ptr[1];
2237         u8 key_idx = 0;
2238         const u8 *mac_addr = NULL;
2239         bool pairwise;
2240         struct get_key_cookie cookie = {
2241                 .error = 0,
2242         };
2243         void *hdr;
2244         struct sk_buff *msg;
2245
2246         if (info->attrs[NL80211_ATTR_KEY_IDX])
2247                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2248
2249         if (key_idx > 5)
2250                 return -EINVAL;
2251
2252         if (info->attrs[NL80211_ATTR_MAC])
2253                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2254
2255         pairwise = !!mac_addr;
2256         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2257                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2258                 if (kt >= NUM_NL80211_KEYTYPES)
2259                         return -EINVAL;
2260                 if (kt != NL80211_KEYTYPE_GROUP &&
2261                     kt != NL80211_KEYTYPE_PAIRWISE)
2262                         return -EINVAL;
2263                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2264         }
2265
2266         if (!rdev->ops->get_key)
2267                 return -EOPNOTSUPP;
2268
2269         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2270         if (!msg)
2271                 return -ENOMEM;
2272
2273         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2274                              NL80211_CMD_NEW_KEY);
2275         if (IS_ERR(hdr))
2276                 return PTR_ERR(hdr);
2277
2278         cookie.msg = msg;
2279         cookie.idx = key_idx;
2280
2281         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2282             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2283                 goto nla_put_failure;
2284         if (mac_addr &&
2285             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2286                 goto nla_put_failure;
2287
2288         if (pairwise && mac_addr &&
2289             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2290                 return -ENOENT;
2291
2292         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2293                            get_key_callback);
2294
2295         if (err)
2296                 goto free_msg;
2297
2298         if (cookie.error)
2299                 goto nla_put_failure;
2300
2301         genlmsg_end(msg, hdr);
2302         return genlmsg_reply(msg, info);
2303
2304  nla_put_failure:
2305         err = -ENOBUFS;
2306  free_msg:
2307         nlmsg_free(msg);
2308         return err;
2309 }
2310
2311 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2312 {
2313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2314         struct key_parse key;
2315         int err;
2316         struct net_device *dev = info->user_ptr[1];
2317
2318         err = nl80211_parse_key(info, &key);
2319         if (err)
2320                 return err;
2321
2322         if (key.idx < 0)
2323                 return -EINVAL;
2324
2325         /* only support setting default key */
2326         if (!key.def && !key.defmgmt)
2327                 return -EINVAL;
2328
2329         wdev_lock(dev->ieee80211_ptr);
2330
2331         if (key.def) {
2332                 if (!rdev->ops->set_default_key) {
2333                         err = -EOPNOTSUPP;
2334                         goto out;
2335                 }
2336
2337                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2338                 if (err)
2339                         goto out;
2340
2341                 err = rdev_set_default_key(rdev, dev, key.idx,
2342                                                  key.def_uni, key.def_multi);
2343
2344                 if (err)
2345                         goto out;
2346
2347 #ifdef CONFIG_CFG80211_WEXT
2348                 dev->ieee80211_ptr->wext.default_key = key.idx;
2349 #endif
2350         } else {
2351                 if (key.def_uni || !key.def_multi) {
2352                         err = -EINVAL;
2353                         goto out;
2354                 }
2355
2356                 if (!rdev->ops->set_default_mgmt_key) {
2357                         err = -EOPNOTSUPP;
2358                         goto out;
2359                 }
2360
2361                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2362                 if (err)
2363                         goto out;
2364
2365                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2366                 if (err)
2367                         goto out;
2368
2369 #ifdef CONFIG_CFG80211_WEXT
2370                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2371 #endif
2372         }
2373
2374  out:
2375         wdev_unlock(dev->ieee80211_ptr);
2376
2377         return err;
2378 }
2379
2380 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2381 {
2382         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2383         int err;
2384         struct net_device *dev = info->user_ptr[1];
2385         struct key_parse key;
2386         const u8 *mac_addr = NULL;
2387
2388         err = nl80211_parse_key(info, &key);
2389         if (err)
2390                 return err;
2391
2392         if (!key.p.key)
2393                 return -EINVAL;
2394
2395         if (info->attrs[NL80211_ATTR_MAC])
2396                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2397
2398         if (key.type == -1) {
2399                 if (mac_addr)
2400                         key.type = NL80211_KEYTYPE_PAIRWISE;
2401                 else
2402                         key.type = NL80211_KEYTYPE_GROUP;
2403         }
2404
2405         /* for now */
2406         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2407             key.type != NL80211_KEYTYPE_GROUP)
2408                 return -EINVAL;
2409
2410         if (!rdev->ops->add_key)
2411                 return -EOPNOTSUPP;
2412
2413         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2414                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2415                                            mac_addr))
2416                 return -EINVAL;
2417
2418         wdev_lock(dev->ieee80211_ptr);
2419         err = nl80211_key_allowed(dev->ieee80211_ptr);
2420         if (!err)
2421                 err = rdev_add_key(rdev, dev, key.idx,
2422                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2423                                     mac_addr, &key.p);
2424         wdev_unlock(dev->ieee80211_ptr);
2425
2426         return err;
2427 }
2428
2429 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2430 {
2431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2432         int err;
2433         struct net_device *dev = info->user_ptr[1];
2434         u8 *mac_addr = NULL;
2435         struct key_parse key;
2436
2437         err = nl80211_parse_key(info, &key);
2438         if (err)
2439                 return err;
2440
2441         if (info->attrs[NL80211_ATTR_MAC])
2442                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2443
2444         if (key.type == -1) {
2445                 if (mac_addr)
2446                         key.type = NL80211_KEYTYPE_PAIRWISE;
2447                 else
2448                         key.type = NL80211_KEYTYPE_GROUP;
2449         }
2450
2451         /* for now */
2452         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2453             key.type != NL80211_KEYTYPE_GROUP)
2454                 return -EINVAL;
2455
2456         if (!rdev->ops->del_key)
2457                 return -EOPNOTSUPP;
2458
2459         wdev_lock(dev->ieee80211_ptr);
2460         err = nl80211_key_allowed(dev->ieee80211_ptr);
2461
2462         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2463             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2464                 err = -ENOENT;
2465
2466         if (!err)
2467                 err = rdev_del_key(rdev, dev, key.idx,
2468                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2469                                    mac_addr);
2470
2471 #ifdef CONFIG_CFG80211_WEXT
2472         if (!err) {
2473                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2474                         dev->ieee80211_ptr->wext.default_key = -1;
2475                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2476                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2477         }
2478 #endif
2479         wdev_unlock(dev->ieee80211_ptr);
2480
2481         return err;
2482 }
2483
2484 static int nl80211_parse_beacon(struct genl_info *info,
2485                                 struct cfg80211_beacon_data *bcn)
2486 {
2487         bool haveinfo = false;
2488
2489         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2490             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2491             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2492             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2493                 return -EINVAL;
2494
2495         memset(bcn, 0, sizeof(*bcn));
2496
2497         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2498                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2499                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2500                 if (!bcn->head_len)
2501                         return -EINVAL;
2502                 haveinfo = true;
2503         }
2504
2505         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2506                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2507                 bcn->tail_len =
2508                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2509                 haveinfo = true;
2510         }
2511
2512         if (!haveinfo)
2513                 return -EINVAL;
2514
2515         if (info->attrs[NL80211_ATTR_IE]) {
2516                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2517                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2518         }
2519
2520         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2521                 bcn->proberesp_ies =
2522                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2523                 bcn->proberesp_ies_len =
2524                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2525         }
2526
2527         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2528                 bcn->assocresp_ies =
2529                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2530                 bcn->assocresp_ies_len =
2531                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2532         }
2533
2534         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2535                 bcn->probe_resp =
2536                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2537                 bcn->probe_resp_len =
2538                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2539         }
2540
2541         return 0;
2542 }
2543
2544 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2545                                    struct cfg80211_ap_settings *params)
2546 {
2547         struct wireless_dev *wdev;
2548         bool ret = false;
2549
2550         mutex_lock(&rdev->devlist_mtx);
2551
2552         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2553                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2554                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2555                         continue;
2556
2557                 if (!wdev->preset_chandef.chan)
2558                         continue;
2559
2560                 params->chandef = wdev->preset_chandef;
2561                 ret = true;
2562                 break;
2563         }
2564
2565         mutex_unlock(&rdev->devlist_mtx);
2566
2567         return ret;
2568 }
2569
2570 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2571                                     enum nl80211_auth_type auth_type,
2572                                     enum nl80211_commands cmd)
2573 {
2574         if (auth_type > NL80211_AUTHTYPE_MAX)
2575                 return false;
2576
2577         switch (cmd) {
2578         case NL80211_CMD_AUTHENTICATE:
2579                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2580                     auth_type == NL80211_AUTHTYPE_SAE)
2581                         return false;
2582                 return true;
2583         case NL80211_CMD_CONNECT:
2584         case NL80211_CMD_START_AP:
2585                 /* SAE not supported yet */
2586                 if (auth_type == NL80211_AUTHTYPE_SAE)
2587                         return false;
2588                 return true;
2589         default:
2590                 return false;
2591         }
2592 }
2593
2594 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2595 {
2596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2597         struct net_device *dev = info->user_ptr[1];
2598         struct wireless_dev *wdev = dev->ieee80211_ptr;
2599         struct cfg80211_ap_settings params;
2600         int err;
2601
2602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2604                 return -EOPNOTSUPP;
2605
2606         if (!rdev->ops->start_ap)
2607                 return -EOPNOTSUPP;
2608
2609         if (wdev->beacon_interval)
2610                 return -EALREADY;
2611
2612         memset(&params, 0, sizeof(params));
2613
2614         /* these are required for START_AP */
2615         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2616             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2617             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2618                 return -EINVAL;
2619
2620         err = nl80211_parse_beacon(info, &params.beacon);
2621         if (err)
2622                 return err;
2623
2624         params.beacon_interval =
2625                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2626         params.dtim_period =
2627                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2628
2629         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2630         if (err)
2631                 return err;
2632
2633         /*
2634          * In theory, some of these attributes should be required here
2635          * but since they were not used when the command was originally
2636          * added, keep them optional for old user space programs to let
2637          * them continue to work with drivers that do not need the
2638          * additional information -- drivers must check!
2639          */
2640         if (info->attrs[NL80211_ATTR_SSID]) {
2641                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2642                 params.ssid_len =
2643                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2644                 if (params.ssid_len == 0 ||
2645                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2646                         return -EINVAL;
2647         }
2648
2649         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2650                 params.hidden_ssid = nla_get_u32(
2651                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2652                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2653                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2654                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2655                         return -EINVAL;
2656         }
2657
2658         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2659
2660         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2661                 params.auth_type = nla_get_u32(
2662                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2663                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2664                                              NL80211_CMD_START_AP))
2665                         return -EINVAL;
2666         } else
2667                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2668
2669         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2670                                       NL80211_MAX_NR_CIPHER_SUITES);
2671         if (err)
2672                 return err;
2673
2674         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2675                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2676                         return -EOPNOTSUPP;
2677                 params.inactivity_timeout = nla_get_u16(
2678                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2679         }
2680
2681         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2682                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2683                         return -EINVAL;
2684                 params.p2p_ctwindow =
2685                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2686                 if (params.p2p_ctwindow > 127)
2687                         return -EINVAL;
2688                 if (params.p2p_ctwindow != 0 &&
2689                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2690                         return -EINVAL;
2691         }
2692
2693         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2694                 u8 tmp;
2695
2696                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2697                         return -EINVAL;
2698                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2699                 if (tmp > 1)
2700                         return -EINVAL;
2701                 params.p2p_opp_ps = tmp;
2702                 if (params.p2p_opp_ps != 0 &&
2703                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2704                         return -EINVAL;
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2708                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2709                 if (err)
2710                         return err;
2711         } else if (wdev->preset_chandef.chan) {
2712                 params.chandef = wdev->preset_chandef;
2713         } else if (!nl80211_get_ap_channel(rdev, &params))
2714                 return -EINVAL;
2715
2716         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2717                 return -EINVAL;
2718
2719         mutex_lock(&rdev->devlist_mtx);
2720         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2721                                     CHAN_MODE_SHARED);
2722         mutex_unlock(&rdev->devlist_mtx);
2723
2724         if (err)
2725                 return err;
2726
2727         err = rdev_start_ap(rdev, dev, &params);
2728         if (!err) {
2729                 wdev->preset_chandef = params.chandef;
2730                 wdev->beacon_interval = params.beacon_interval;
2731                 wdev->channel = params.chandef.chan;
2732                 wdev->ssid_len = params.ssid_len;
2733                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2734         }
2735         return err;
2736 }
2737
2738 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2739 {
2740         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2741         struct net_device *dev = info->user_ptr[1];
2742         struct wireless_dev *wdev = dev->ieee80211_ptr;
2743         struct cfg80211_beacon_data params;
2744         int err;
2745
2746         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2747             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2748                 return -EOPNOTSUPP;
2749
2750         if (!rdev->ops->change_beacon)
2751                 return -EOPNOTSUPP;
2752
2753         if (!wdev->beacon_interval)
2754                 return -EINVAL;
2755
2756         err = nl80211_parse_beacon(info, &params);
2757         if (err)
2758                 return err;
2759
2760         return rdev_change_beacon(rdev, dev, &params);
2761 }
2762
2763 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2764 {
2765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2766         struct net_device *dev = info->user_ptr[1];
2767
2768         return cfg80211_stop_ap(rdev, dev);
2769 }
2770
2771 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2772         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2773         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2774         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2775         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2776         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2777         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2778 };
2779
2780 static int parse_station_flags(struct genl_info *info,
2781                                enum nl80211_iftype iftype,
2782                                struct station_parameters *params)
2783 {
2784         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2785         struct nlattr *nla;
2786         int flag;
2787
2788         /*
2789          * Try parsing the new attribute first so userspace
2790          * can specify both for older kernels.
2791          */
2792         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2793         if (nla) {
2794                 struct nl80211_sta_flag_update *sta_flags;
2795
2796                 sta_flags = nla_data(nla);
2797                 params->sta_flags_mask = sta_flags->mask;
2798                 params->sta_flags_set = sta_flags->set;
2799                 if ((params->sta_flags_mask |
2800                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2801                         return -EINVAL;
2802                 return 0;
2803         }
2804
2805         /* if present, parse the old attribute */
2806
2807         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2808         if (!nla)
2809                 return 0;
2810
2811         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2812                              nla, sta_flags_policy))
2813                 return -EINVAL;
2814
2815         /*
2816          * Only allow certain flags for interface types so that
2817          * other attributes are silently ignored. Remember that
2818          * this is backward compatibility code with old userspace
2819          * and shouldn't be hit in other cases anyway.
2820          */
2821         switch (iftype) {
2822         case NL80211_IFTYPE_AP:
2823         case NL80211_IFTYPE_AP_VLAN:
2824         case NL80211_IFTYPE_P2P_GO:
2825                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2826                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2827                                          BIT(NL80211_STA_FLAG_WME) |
2828                                          BIT(NL80211_STA_FLAG_MFP);
2829                 break;
2830         case NL80211_IFTYPE_P2P_CLIENT:
2831         case NL80211_IFTYPE_STATION:
2832                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2833                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2834                 break;
2835         case NL80211_IFTYPE_MESH_POINT:
2836                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2837                                          BIT(NL80211_STA_FLAG_MFP) |
2838                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2839         default:
2840                 return -EINVAL;
2841         }
2842
2843         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2844                 if (flags[flag]) {
2845                         params->sta_flags_set |= (1<<flag);
2846
2847                         /* no longer support new API additions in old API */
2848                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2849                                 return -EINVAL;
2850                 }
2851         }
2852
2853         return 0;
2854 }
2855
2856 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2857                                  int attr)
2858 {
2859         struct nlattr *rate;
2860         u32 bitrate;
2861         u16 bitrate_compat;
2862
2863         rate = nla_nest_start(msg, attr);
2864         if (!rate)
2865                 return false;
2866
2867         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2868         bitrate = cfg80211_calculate_bitrate(info);
2869         /* report 16-bit bitrate only if we can */
2870         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2871         if (bitrate > 0 &&
2872             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2873                 return false;
2874         if (bitrate_compat > 0 &&
2875             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2876                 return false;
2877
2878         if (info->flags & RATE_INFO_FLAGS_MCS) {
2879                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2880                         return false;
2881                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2882                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2883                         return false;
2884                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2885                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2886                         return false;
2887         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2888                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2889                         return false;
2890                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2891                         return false;
2892                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2893                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2894                         return false;
2895                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2896                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2897                         return false;
2898                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2899                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2900                         return false;
2901                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2902                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2903                         return false;
2904                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2905                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2906                         return false;
2907         }
2908
2909         nla_nest_end(msg, rate);
2910         return true;
2911 }
2912
2913 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2914                                 int flags,
2915                                 struct cfg80211_registered_device *rdev,
2916                                 struct net_device *dev,
2917                                 const u8 *mac_addr, struct station_info *sinfo)
2918 {
2919         void *hdr;
2920         struct nlattr *sinfoattr, *bss_param;
2921
2922         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2923         if (!hdr)
2924                 return -1;
2925
2926         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2927             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2928             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2929                 goto nla_put_failure;
2930
2931         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2932         if (!sinfoattr)
2933                 goto nla_put_failure;
2934         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2935             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2936                         sinfo->connected_time))
2937                 goto nla_put_failure;
2938         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2939             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2940                         sinfo->inactive_time))
2941                 goto nla_put_failure;
2942         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2943             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2944                         sinfo->rx_bytes))
2945                 goto nla_put_failure;
2946         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2947             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2948                         sinfo->tx_bytes))
2949                 goto nla_put_failure;
2950         if ((sinfo->filled & STATION_INFO_LLID) &&
2951             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2952                 goto nla_put_failure;
2953         if ((sinfo->filled & STATION_INFO_PLID) &&
2954             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2955                 goto nla_put_failure;
2956         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2957             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2958                        sinfo->plink_state))
2959                 goto nla_put_failure;
2960         switch (rdev->wiphy.signal_type) {
2961         case CFG80211_SIGNAL_TYPE_MBM:
2962                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2963                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2964                                sinfo->signal))
2965                         goto nla_put_failure;
2966                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2967                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2968                                sinfo->signal_avg))
2969                         goto nla_put_failure;
2970                 break;
2971         default:
2972                 break;
2973         }
2974         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2975                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2976                                           NL80211_STA_INFO_TX_BITRATE))
2977                         goto nla_put_failure;
2978         }
2979         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2980                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2981                                           NL80211_STA_INFO_RX_BITRATE))
2982                         goto nla_put_failure;
2983         }
2984         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2985             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2986                         sinfo->rx_packets))
2987                 goto nla_put_failure;
2988         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2989             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2990                         sinfo->tx_packets))
2991                 goto nla_put_failure;
2992         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2993             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2994                         sinfo->tx_retries))
2995                 goto nla_put_failure;
2996         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2997             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2998                         sinfo->tx_failed))
2999                 goto nla_put_failure;
3000         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3001             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3002                         sinfo->beacon_loss_count))
3003                 goto nla_put_failure;
3004         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3005                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3006                 if (!bss_param)
3007                         goto nla_put_failure;
3008
3009                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3010                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3011                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3012                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3013                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3014                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3015                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3016                                sinfo->bss_param.dtim_period) ||
3017                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3018                                 sinfo->bss_param.beacon_interval))
3019                         goto nla_put_failure;
3020
3021                 nla_nest_end(msg, bss_param);
3022         }
3023         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3024             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3025                     sizeof(struct nl80211_sta_flag_update),
3026                     &sinfo->sta_flags))
3027                 goto nla_put_failure;
3028         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3029                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3030                             sinfo->t_offset))
3031                 goto nla_put_failure;
3032         nla_nest_end(msg, sinfoattr);
3033
3034         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3035             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3036                     sinfo->assoc_req_ies))
3037                 goto nla_put_failure;
3038
3039         return genlmsg_end(msg, hdr);
3040
3041  nla_put_failure:
3042         genlmsg_cancel(msg, hdr);
3043         return -EMSGSIZE;
3044 }
3045
3046 static int nl80211_dump_station(struct sk_buff *skb,
3047                                 struct netlink_callback *cb)
3048 {
3049         struct station_info sinfo;
3050         struct cfg80211_registered_device *dev;
3051         struct net_device *netdev;
3052         u8 mac_addr[ETH_ALEN];
3053         int sta_idx = cb->args[1];
3054         int err;
3055
3056         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3057         if (err)
3058                 return err;
3059
3060         if (!dev->ops->dump_station) {
3061                 err = -EOPNOTSUPP;
3062                 goto out_err;
3063         }
3064
3065         while (1) {
3066                 memset(&sinfo, 0, sizeof(sinfo));
3067                 err = rdev_dump_station(dev, netdev, sta_idx,
3068                                         mac_addr, &sinfo);
3069                 if (err == -ENOENT)
3070                         break;
3071                 if (err)
3072                         goto out_err;
3073
3074                 if (nl80211_send_station(skb,
3075                                 NETLINK_CB(cb->skb).portid,
3076                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3077                                 dev, netdev, mac_addr,
3078                                 &sinfo) < 0)
3079                         goto out;
3080
3081                 sta_idx++;
3082         }
3083
3084
3085  out:
3086         cb->args[1] = sta_idx;
3087         err = skb->len;
3088  out_err:
3089         nl80211_finish_netdev_dump(dev);
3090
3091         return err;
3092 }
3093
3094 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3095 {
3096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3097         struct net_device *dev = info->user_ptr[1];
3098         struct station_info sinfo;
3099         struct sk_buff *msg;
3100         u8 *mac_addr = NULL;
3101         int err;
3102
3103         memset(&sinfo, 0, sizeof(sinfo));
3104
3105         if (!info->attrs[NL80211_ATTR_MAC])
3106                 return -EINVAL;
3107
3108         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3109
3110         if (!rdev->ops->get_station)
3111                 return -EOPNOTSUPP;
3112
3113         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3114         if (err)
3115                 return err;
3116
3117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3118         if (!msg)
3119                 return -ENOMEM;
3120
3121         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3122                                  rdev, dev, mac_addr, &sinfo) < 0) {
3123                 nlmsg_free(msg);
3124                 return -ENOBUFS;
3125         }
3126
3127         return genlmsg_reply(msg, info);
3128 }
3129
3130 /*
3131  * Get vlan interface making sure it is running and on the right wiphy.
3132  */
3133 static struct net_device *get_vlan(struct genl_info *info,
3134                                    struct cfg80211_registered_device *rdev)
3135 {
3136         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3137         struct net_device *v;
3138         int ret;
3139
3140         if (!vlanattr)
3141                 return NULL;
3142
3143         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3144         if (!v)
3145                 return ERR_PTR(-ENODEV);
3146
3147         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3148                 ret = -EINVAL;
3149                 goto error;
3150         }
3151
3152         if (!netif_running(v)) {
3153                 ret = -ENETDOWN;
3154                 goto error;
3155         }
3156
3157         return v;
3158  error:
3159         dev_put(v);
3160         return ERR_PTR(ret);
3161 }
3162
3163 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3164 {
3165         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3166         int err;
3167         struct net_device *dev = info->user_ptr[1];
3168         struct station_parameters params;
3169         u8 *mac_addr = NULL;
3170
3171         memset(&params, 0, sizeof(params));
3172
3173         params.listen_interval = -1;
3174         params.plink_state = -1;
3175
3176         if (info->attrs[NL80211_ATTR_STA_AID])
3177                 return -EINVAL;
3178
3179         if (!info->attrs[NL80211_ATTR_MAC])
3180                 return -EINVAL;
3181
3182         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3183
3184         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3185                 params.supported_rates =
3186                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3187                 params.supported_rates_len =
3188                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3189         }
3190
3191         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3192                 params.listen_interval =
3193                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3194
3195         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3196                 params.ht_capa =
3197                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3198
3199         if (!rdev->ops->change_station)
3200                 return -EOPNOTSUPP;
3201
3202         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3203                 return -EINVAL;
3204
3205         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3206                 params.plink_action =
3207                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3208
3209         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3210                 params.plink_state =
3211                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3212
3213         switch (dev->ieee80211_ptr->iftype) {
3214         case NL80211_IFTYPE_AP:
3215         case NL80211_IFTYPE_AP_VLAN:
3216         case NL80211_IFTYPE_P2P_GO:
3217                 /* disallow mesh-specific things */
3218                 if (params.plink_action)
3219                         return -EINVAL;
3220
3221                 /* TDLS can't be set, ... */
3222                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3223                         return -EINVAL;
3224                 /*
3225                  * ... but don't bother the driver with it. This works around
3226                  * a hostapd/wpa_supplicant issue -- it always includes the
3227                  * TLDS_PEER flag in the mask even for AP mode.
3228                  */
3229                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3230
3231                 /* accept only the listed bits */
3232                 if (params.sta_flags_mask &
3233                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3234                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3235                                   BIT(NL80211_STA_FLAG_WME) |
3236                                   BIT(NL80211_STA_FLAG_MFP)))
3237                         return -EINVAL;
3238
3239                 /* must be last in here for error handling */
3240                 params.vlan = get_vlan(info, rdev);
3241                 if (IS_ERR(params.vlan))
3242                         return PTR_ERR(params.vlan);
3243                 break;
3244         case NL80211_IFTYPE_P2P_CLIENT:
3245         case NL80211_IFTYPE_STATION:
3246                 /*
3247                  * Don't allow userspace to change the TDLS_PEER flag,
3248                  * but silently ignore attempts to change it since we
3249                  * don't have state here to verify that it doesn't try
3250                  * to change the flag.
3251                  */
3252                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3253                 /* fall through */
3254         case NL80211_IFTYPE_ADHOC:
3255                 /* disallow things sta doesn't support */
3256                 if (params.plink_action)
3257                         return -EINVAL;
3258                 if (params.ht_capa)
3259                         return -EINVAL;
3260                 if (params.listen_interval >= 0)
3261                         return -EINVAL;
3262                 /* reject any changes other than AUTHORIZED */
3263                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3264                         return -EINVAL;
3265                 break;
3266         case NL80211_IFTYPE_MESH_POINT:
3267                 /* disallow things mesh doesn't support */
3268                 if (params.vlan)
3269                         return -EINVAL;
3270                 if (params.ht_capa)
3271                         return -EINVAL;
3272                 if (params.listen_interval >= 0)
3273                         return -EINVAL;
3274                 /*
3275                  * No special handling for TDLS here -- the userspace
3276                  * mesh code doesn't have this bug.
3277                  */
3278                 if (params.sta_flags_mask &
3279                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3280                                   BIT(NL80211_STA_FLAG_MFP) |
3281                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3282                         return -EINVAL;
3283                 break;
3284         default:
3285                 return -EOPNOTSUPP;
3286         }
3287
3288         /* be aware of params.vlan when changing code here */
3289
3290         err = rdev_change_station(rdev, dev, mac_addr, &params);
3291
3292         if (params.vlan)
3293                 dev_put(params.vlan);
3294
3295         return err;
3296 }
3297
3298 static struct nla_policy
3299 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3300         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3301         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3302 };
3303
3304 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3305 {
3306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3307         int err;
3308         struct net_device *dev = info->user_ptr[1];
3309         struct station_parameters params;
3310         u8 *mac_addr = NULL;
3311
3312         memset(&params, 0, sizeof(params));
3313
3314         if (!info->attrs[NL80211_ATTR_MAC])
3315                 return -EINVAL;
3316
3317         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3318                 return -EINVAL;
3319
3320         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3321                 return -EINVAL;
3322
3323         if (!info->attrs[NL80211_ATTR_STA_AID])
3324                 return -EINVAL;
3325
3326         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3327         params.supported_rates =
3328                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3329         params.supported_rates_len =
3330                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3331         params.listen_interval =
3332                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3333
3334         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3335         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3336                 return -EINVAL;
3337
3338         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3339                 params.ht_capa =
3340                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3341
3342         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3343                 params.vht_capa =
3344                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3345
3346         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3347                 params.plink_action =
3348                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3349
3350         if (!rdev->ops->add_station)
3351                 return -EOPNOTSUPP;
3352
3353         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3354                 return -EINVAL;
3355
3356         switch (dev->ieee80211_ptr->iftype) {
3357         case NL80211_IFTYPE_AP:
3358         case NL80211_IFTYPE_AP_VLAN:
3359         case NL80211_IFTYPE_P2P_GO:
3360                 /* parse WME attributes if sta is WME capable */
3361                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3362                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3363                     info->attrs[NL80211_ATTR_STA_WME]) {
3364                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3365                         struct nlattr *nla;
3366
3367                         nla = info->attrs[NL80211_ATTR_STA_WME];
3368                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3369                                                nl80211_sta_wme_policy);
3370                         if (err)
3371                                 return err;
3372
3373                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3374                                 params.uapsd_queues =
3375                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3376                         if (params.uapsd_queues &
3377                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3378                                 return -EINVAL;
3379
3380                         if (tb[NL80211_STA_WME_MAX_SP])
3381                                 params.max_sp =
3382                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3383
3384                         if (params.max_sp &
3385                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3386                                 return -EINVAL;
3387
3388                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3389                 }
3390                 /* TDLS peers cannot be added */
3391                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3392                         return -EINVAL;
3393                 /* but don't bother the driver with it */
3394                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3395
3396                 /* must be last in here for error handling */
3397                 params.vlan = get_vlan(info, rdev);
3398                 if (IS_ERR(params.vlan))
3399                         return PTR_ERR(params.vlan);
3400                 break;
3401         case NL80211_IFTYPE_MESH_POINT:
3402                 /* TDLS peers cannot be added */
3403                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3404                         return -EINVAL;
3405                 break;
3406         case NL80211_IFTYPE_STATION:
3407                 /* Only TDLS peers can be added */
3408                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3409                         return -EINVAL;
3410                 /* Can only add if TDLS ... */
3411                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3412                         return -EOPNOTSUPP;
3413                 /* ... with external setup is supported */
3414                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3415                         return -EOPNOTSUPP;
3416                 break;
3417         default:
3418                 return -EOPNOTSUPP;
3419         }
3420
3421         /* be aware of params.vlan when changing code here */
3422
3423         err = rdev_add_station(rdev, dev, mac_addr, &params);
3424
3425         if (params.vlan)
3426                 dev_put(params.vlan);
3427         return err;
3428 }
3429
3430 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3431 {
3432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3433         struct net_device *dev = info->user_ptr[1];
3434         u8 *mac_addr = NULL;
3435
3436         if (info->attrs[NL80211_ATTR_MAC])
3437                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3438
3439         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3440             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3441             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3442             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3443                 return -EINVAL;
3444
3445         if (!rdev->ops->del_station)
3446                 return -EOPNOTSUPP;
3447
3448         return rdev_del_station(rdev, dev, mac_addr);
3449 }
3450
3451 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3452                                 int flags, struct net_device *dev,
3453                                 u8 *dst, u8 *next_hop,
3454                                 struct mpath_info *pinfo)
3455 {
3456         void *hdr;
3457         struct nlattr *pinfoattr;
3458
3459         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3460         if (!hdr)
3461                 return -1;
3462
3463         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3464             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3465             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3466             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3467                 goto nla_put_failure;
3468
3469         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3470         if (!pinfoattr)
3471                 goto nla_put_failure;
3472         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3473             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3474                         pinfo->frame_qlen))
3475                 goto nla_put_failure;
3476         if (((pinfo->filled & MPATH_INFO_SN) &&
3477              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3478             ((pinfo->filled & MPATH_INFO_METRIC) &&
3479              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3480                          pinfo->metric)) ||
3481             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3482              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3483                          pinfo->exptime)) ||
3484             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3485              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3486                         pinfo->flags)) ||
3487             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3488              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3489                          pinfo->discovery_timeout)) ||
3490             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3491              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3492                         pinfo->discovery_retries)))
3493                 goto nla_put_failure;
3494
3495         nla_nest_end(msg, pinfoattr);
3496
3497         return genlmsg_end(msg, hdr);
3498
3499  nla_put_failure:
3500         genlmsg_cancel(msg, hdr);
3501         return -EMSGSIZE;
3502 }
3503
3504 static int nl80211_dump_mpath(struct sk_buff *skb,
3505                               struct netlink_callback *cb)
3506 {
3507         struct mpath_info pinfo;
3508         struct cfg80211_registered_device *dev;
3509         struct net_device *netdev;
3510         u8 dst[ETH_ALEN];
3511         u8 next_hop[ETH_ALEN];
3512         int path_idx = cb->args[1];
3513         int err;
3514
3515         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3516         if (err)
3517                 return err;
3518
3519         if (!dev->ops->dump_mpath) {
3520                 err = -EOPNOTSUPP;
3521                 goto out_err;
3522         }
3523
3524         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3525                 err = -EOPNOTSUPP;
3526                 goto out_err;
3527         }
3528
3529         while (1) {
3530                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3531                                       &pinfo);
3532                 if (err == -ENOENT)
3533                         break;
3534                 if (err)
3535                         goto out_err;
3536
3537                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3538                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3539                                        netdev, dst, next_hop,
3540                                        &pinfo) < 0)
3541                         goto out;
3542
3543                 path_idx++;
3544         }
3545
3546
3547  out:
3548         cb->args[1] = path_idx;
3549         err = skb->len;
3550  out_err:
3551         nl80211_finish_netdev_dump(dev);
3552         return err;
3553 }
3554
3555 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3556 {
3557         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3558         int err;
3559         struct net_device *dev = info->user_ptr[1];
3560         struct mpath_info pinfo;
3561         struct sk_buff *msg;
3562         u8 *dst = NULL;
3563         u8 next_hop[ETH_ALEN];
3564
3565         memset(&pinfo, 0, sizeof(pinfo));
3566
3567         if (!info->attrs[NL80211_ATTR_MAC])
3568                 return -EINVAL;
3569
3570         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3571
3572         if (!rdev->ops->get_mpath)
3573                 return -EOPNOTSUPP;
3574
3575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3576                 return -EOPNOTSUPP;
3577
3578         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3579         if (err)
3580                 return err;
3581
3582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3583         if (!msg)
3584                 return -ENOMEM;
3585
3586         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3587                                  dev, dst, next_hop, &pinfo) < 0) {
3588                 nlmsg_free(msg);
3589                 return -ENOBUFS;
3590         }
3591
3592         return genlmsg_reply(msg, info);
3593 }
3594
3595 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3596 {
3597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3598         struct net_device *dev = info->user_ptr[1];
3599         u8 *dst = NULL;
3600         u8 *next_hop = NULL;
3601
3602         if (!info->attrs[NL80211_ATTR_MAC])
3603                 return -EINVAL;
3604
3605         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3606                 return -EINVAL;
3607
3608         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3609         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3610
3611         if (!rdev->ops->change_mpath)
3612                 return -EOPNOTSUPP;
3613
3614         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3615                 return -EOPNOTSUPP;
3616
3617         return rdev_change_mpath(rdev, dev, dst, next_hop);
3618 }
3619
3620 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3621 {
3622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3623         struct net_device *dev = info->user_ptr[1];
3624         u8 *dst = NULL;
3625         u8 *next_hop = NULL;
3626
3627         if (!info->attrs[NL80211_ATTR_MAC])
3628                 return -EINVAL;
3629
3630         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3631                 return -EINVAL;
3632
3633         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3634         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3635
3636         if (!rdev->ops->add_mpath)
3637                 return -EOPNOTSUPP;
3638
3639         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3640                 return -EOPNOTSUPP;
3641
3642         return rdev_add_mpath(rdev, dev, dst, next_hop);
3643 }
3644
3645 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3646 {
3647         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3648         struct net_device *dev = info->user_ptr[1];
3649         u8 *dst = NULL;
3650
3651         if (info->attrs[NL80211_ATTR_MAC])
3652                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3653
3654         if (!rdev->ops->del_mpath)
3655                 return -EOPNOTSUPP;
3656
3657         return rdev_del_mpath(rdev, dev, dst);
3658 }
3659
3660 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3661 {
3662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3663         struct net_device *dev = info->user_ptr[1];
3664         struct bss_parameters params;
3665
3666         memset(&params, 0, sizeof(params));
3667         /* default to not changing parameters */
3668         params.use_cts_prot = -1;
3669         params.use_short_preamble = -1;
3670         params.use_short_slot_time = -1;
3671         params.ap_isolate = -1;
3672         params.ht_opmode = -1;
3673         params.p2p_ctwindow = -1;
3674         params.p2p_opp_ps = -1;
3675
3676         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3677                 params.use_cts_prot =
3678                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3679         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3680                 params.use_short_preamble =
3681                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3682         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3683                 params.use_short_slot_time =
3684                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3685         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3686                 params.basic_rates =
3687                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3688                 params.basic_rates_len =
3689                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3690         }
3691         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3692                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3693         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3694                 params.ht_opmode =
3695                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3696
3697         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3698                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3699                         return -EINVAL;
3700                 params.p2p_ctwindow =
3701                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3702                 if (params.p2p_ctwindow < 0)
3703                         return -EINVAL;
3704                 if (params.p2p_ctwindow != 0 &&
3705                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3706                         return -EINVAL;
3707         }
3708
3709         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3710                 u8 tmp;
3711
3712                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3713                         return -EINVAL;
3714                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3715                 if (tmp > 1)
3716                         return -EINVAL;
3717                 params.p2p_opp_ps = tmp;
3718                 if (params.p2p_opp_ps &&
3719                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3720                         return -EINVAL;
3721         }
3722
3723         if (!rdev->ops->change_bss)
3724                 return -EOPNOTSUPP;
3725
3726         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3727             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3728                 return -EOPNOTSUPP;
3729
3730         return rdev_change_bss(rdev, dev, &params);
3731 }
3732
3733 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3734         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3735         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3736         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3737         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3738         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3739         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3740 };
3741
3742 static int parse_reg_rule(struct nlattr *tb[],
3743         struct ieee80211_reg_rule *reg_rule)
3744 {
3745         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3746         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3747
3748         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3749                 return -EINVAL;
3750         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3751                 return -EINVAL;
3752         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3753                 return -EINVAL;
3754         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3755                 return -EINVAL;
3756         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3757                 return -EINVAL;
3758
3759         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3760
3761         freq_range->start_freq_khz =
3762                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3763         freq_range->end_freq_khz =
3764                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3765         freq_range->max_bandwidth_khz =
3766                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3767
3768         power_rule->max_eirp =
3769                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3770
3771         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3772                 power_rule->max_antenna_gain =
3773                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3774
3775         return 0;
3776 }
3777
3778 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3779 {
3780         int r;
3781         char *data = NULL;
3782         enum nl80211_user_reg_hint_type user_reg_hint_type;
3783
3784         /*
3785          * You should only get this when cfg80211 hasn't yet initialized
3786          * completely when built-in to the kernel right between the time
3787          * window between nl80211_init() and regulatory_init(), if that is
3788          * even possible.
3789          */
3790         mutex_lock(&cfg80211_mutex);
3791         if (unlikely(!cfg80211_regdomain)) {
3792                 mutex_unlock(&cfg80211_mutex);
3793                 return -EINPROGRESS;
3794         }
3795         mutex_unlock(&cfg80211_mutex);
3796
3797         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3798                 return -EINVAL;
3799
3800         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3801
3802         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
3803                 user_reg_hint_type =
3804                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
3805         else
3806                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
3807
3808         switch (user_reg_hint_type) {
3809         case NL80211_USER_REG_HINT_USER:
3810         case NL80211_USER_REG_HINT_CELL_BASE:
3811                 break;
3812         default:
3813                 return -EINVAL;
3814         }
3815
3816         r = regulatory_hint_user(data, user_reg_hint_type);
3817
3818         return r;
3819 }
3820
3821 static int nl80211_get_mesh_config(struct sk_buff *skb,
3822                                    struct genl_info *info)
3823 {
3824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3825         struct net_device *dev = info->user_ptr[1];
3826         struct wireless_dev *wdev = dev->ieee80211_ptr;
3827         struct mesh_config cur_params;
3828         int err = 0;
3829         void *hdr;
3830         struct nlattr *pinfoattr;
3831         struct sk_buff *msg;
3832
3833         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3834                 return -EOPNOTSUPP;
3835
3836         if (!rdev->ops->get_mesh_config)
3837                 return -EOPNOTSUPP;
3838
3839         wdev_lock(wdev);
3840         /* If not connected, get default parameters */
3841         if (!wdev->mesh_id_len)
3842                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3843         else
3844                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
3845         wdev_unlock(wdev);
3846
3847         if (err)
3848                 return err;
3849
3850         /* Draw up a netlink message to send back */
3851         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3852         if (!msg)
3853                 return -ENOMEM;
3854         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3855                              NL80211_CMD_GET_MESH_CONFIG);
3856         if (!hdr)
3857                 goto out;
3858         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3859         if (!pinfoattr)
3860                 goto nla_put_failure;
3861         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3862             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3863                         cur_params.dot11MeshRetryTimeout) ||
3864             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3865                         cur_params.dot11MeshConfirmTimeout) ||
3866             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3867                         cur_params.dot11MeshHoldingTimeout) ||
3868             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3869                         cur_params.dot11MeshMaxPeerLinks) ||
3870             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3871                        cur_params.dot11MeshMaxRetries) ||
3872             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3873                        cur_params.dot11MeshTTL) ||
3874             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3875                        cur_params.element_ttl) ||
3876             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3877                        cur_params.auto_open_plinks) ||
3878             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3879                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3880             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3881                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3882             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3883                         cur_params.path_refresh_time) ||
3884             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3885                         cur_params.min_discovery_timeout) ||
3886             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3887                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3888             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3889                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3890             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3891                         cur_params.dot11MeshHWMPperrMinInterval) ||
3892             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3893                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3894             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3895                        cur_params.dot11MeshHWMPRootMode) ||
3896             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3897                         cur_params.dot11MeshHWMPRannInterval) ||
3898             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3899                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3900             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3901                        cur_params.dot11MeshForwarding) ||
3902             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3903                         cur_params.rssi_threshold) ||
3904             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3905                         cur_params.ht_opmode) ||
3906             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3907                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3908             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3909                         cur_params.dot11MeshHWMProotInterval) ||
3910             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3911                         cur_params.dot11MeshHWMPconfirmationInterval))
3912                 goto nla_put_failure;
3913         nla_nest_end(msg, pinfoattr);
3914         genlmsg_end(msg, hdr);
3915         return genlmsg_reply(msg, info);
3916
3917  nla_put_failure:
3918         genlmsg_cancel(msg, hdr);
3919  out:
3920         nlmsg_free(msg);
3921         return -ENOBUFS;
3922 }
3923
3924 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3925         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3926         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3927         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3928         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3929         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3930         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3931         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3932         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3933         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3934         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3935         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3936         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3937         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3938         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3939         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3940         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3941         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3942         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3943         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3944         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3945         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3946         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3947         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3948         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3949         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3950 };
3951
3952 static const struct nla_policy
3953         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3954         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3955         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3956         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3957         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3958         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3959                                     .len = IEEE80211_MAX_DATA_LEN },
3960         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3961 };
3962
3963 static int nl80211_parse_mesh_config(struct genl_info *info,
3964                                      struct mesh_config *cfg,
3965                                      u32 *mask_out)
3966 {
3967         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3968         u32 mask = 0;
3969
3970 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3971 do {\
3972         if (table[attr_num]) {\
3973                 cfg->param = nla_fn(table[attr_num]); \
3974                 mask |= (1 << (attr_num - 1)); \
3975         } \
3976 } while (0);\
3977
3978
3979         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3980                 return -EINVAL;
3981         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3982                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3983                              nl80211_meshconf_params_policy))
3984                 return -EINVAL;
3985
3986         /* This makes sure that there aren't more than 32 mesh config
3987          * parameters (otherwise our bitfield scheme would not work.) */
3988         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3989
3990         /* Fill in the params struct */
3991         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3992                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3993                                   nla_get_u16);
3994         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3995                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3996                                   nla_get_u16);
3997         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3998                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3999                                   nla_get_u16);
4000         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
4001                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4002                                   nla_get_u16);
4003         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
4004                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4005                                   nla_get_u8);
4006         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
4007                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4008         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
4009                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4010                                   nla_get_u8);
4011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
4012                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4013                                   nla_get_u8);
4014         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
4015                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4016                                   nla_get_u32);
4017         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
4018                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4019                                   nla_get_u8);
4020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
4021                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4022                                   nla_get_u32);
4023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
4024                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4025                                   nla_get_u16);
4026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
4027                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4028                                   nla_get_u32);
4029         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4030                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4031                                   nla_get_u16);
4032         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4033                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4034                                   nla_get_u16);
4035         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4036                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
4037                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4038                                   nla_get_u16);
4039         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
4040                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
4041         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
4042                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4043                                   nla_get_u16);
4044         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4045                                   dot11MeshGateAnnouncementProtocol, mask,
4046                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4047                                   nla_get_u8);
4048         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
4049                                   mask, NL80211_MESHCONF_FORWARDING,
4050                                   nla_get_u8);
4051         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
4052                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4053                                   nla_get_u32);
4054         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
4055                                   mask, NL80211_MESHCONF_HT_OPMODE,
4056                                   nla_get_u16);
4057         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4058                                   mask,
4059                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4060                                   nla_get_u32);
4061         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
4062                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4063                                   nla_get_u16);
4064         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4065                                   dot11MeshHWMPconfirmationInterval, mask,
4066                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4067                                   nla_get_u16);
4068         if (mask_out)
4069                 *mask_out = mask;
4070
4071         return 0;
4072
4073 #undef FILL_IN_MESH_PARAM_IF_SET
4074 }
4075
4076 static int nl80211_parse_mesh_setup(struct genl_info *info,
4077                                      struct mesh_setup *setup)
4078 {
4079         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4080
4081         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4082                 return -EINVAL;
4083         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4084                              info->attrs[NL80211_ATTR_MESH_SETUP],
4085                              nl80211_mesh_setup_params_policy))
4086                 return -EINVAL;
4087
4088         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4089                 setup->sync_method =
4090                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4091                  IEEE80211_SYNC_METHOD_VENDOR :
4092                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4093
4094         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4095                 setup->path_sel_proto =
4096                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4097                  IEEE80211_PATH_PROTOCOL_VENDOR :
4098                  IEEE80211_PATH_PROTOCOL_HWMP;
4099
4100         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4101                 setup->path_metric =
4102                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4103                  IEEE80211_PATH_METRIC_VENDOR :
4104                  IEEE80211_PATH_METRIC_AIRTIME;
4105
4106
4107         if (tb[NL80211_MESH_SETUP_IE]) {
4108                 struct nlattr *ieattr =
4109                         tb[NL80211_MESH_SETUP_IE];
4110                 if (!is_valid_ie_attr(ieattr))
4111                         return -EINVAL;
4112                 setup->ie = nla_data(ieattr);
4113                 setup->ie_len = nla_len(ieattr);
4114         }
4115         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4116         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4117
4118         return 0;
4119 }
4120
4121 static int nl80211_update_mesh_config(struct sk_buff *skb,
4122                                       struct genl_info *info)
4123 {
4124         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4125         struct net_device *dev = info->user_ptr[1];
4126         struct wireless_dev *wdev = dev->ieee80211_ptr;
4127         struct mesh_config cfg;
4128         u32 mask;
4129         int err;
4130
4131         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4132                 return -EOPNOTSUPP;
4133
4134         if (!rdev->ops->update_mesh_config)
4135                 return -EOPNOTSUPP;
4136
4137         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4138         if (err)
4139                 return err;
4140
4141         wdev_lock(wdev);
4142         if (!wdev->mesh_id_len)
4143                 err = -ENOLINK;
4144
4145         if (!err)
4146                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4147
4148         wdev_unlock(wdev);
4149
4150         return err;
4151 }
4152
4153 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4154 {
4155         struct sk_buff *msg;
4156         void *hdr = NULL;
4157         struct nlattr *nl_reg_rules;
4158         unsigned int i;
4159         int err = -EINVAL;
4160
4161         mutex_lock(&cfg80211_mutex);
4162
4163         if (!cfg80211_regdomain)
4164                 goto out;
4165
4166         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4167         if (!msg) {
4168                 err = -ENOBUFS;
4169                 goto out;
4170         }
4171
4172         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4173                              NL80211_CMD_GET_REG);
4174         if (!hdr)
4175                 goto put_failure;
4176
4177         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
4178                            cfg80211_regdomain->alpha2) ||
4179             (cfg80211_regdomain->dfs_region &&
4180              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
4181                         cfg80211_regdomain->dfs_region)))
4182                 goto nla_put_failure;
4183
4184         if (reg_last_request_cell_base() &&
4185             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4186                         NL80211_USER_REG_HINT_CELL_BASE))
4187                 goto nla_put_failure;
4188
4189         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4190         if (!nl_reg_rules)
4191                 goto nla_put_failure;
4192
4193         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
4194                 struct nlattr *nl_reg_rule;
4195                 const struct ieee80211_reg_rule *reg_rule;
4196                 const struct ieee80211_freq_range *freq_range;
4197                 const struct ieee80211_power_rule *power_rule;
4198
4199                 reg_rule = &cfg80211_regdomain->reg_rules[i];
4200                 freq_range = &reg_rule->freq_range;
4201                 power_rule = &reg_rule->power_rule;
4202
4203                 nl_reg_rule = nla_nest_start(msg, i);
4204                 if (!nl_reg_rule)
4205                         goto nla_put_failure;
4206
4207                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4208                                 reg_rule->flags) ||
4209                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4210                                 freq_range->start_freq_khz) ||
4211                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4212                                 freq_range->end_freq_khz) ||
4213                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4214                                 freq_range->max_bandwidth_khz) ||
4215                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4216                                 power_rule->max_antenna_gain) ||
4217                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4218                                 power_rule->max_eirp))
4219                         goto nla_put_failure;
4220
4221                 nla_nest_end(msg, nl_reg_rule);
4222         }
4223
4224         nla_nest_end(msg, nl_reg_rules);
4225
4226         genlmsg_end(msg, hdr);
4227         err = genlmsg_reply(msg, info);
4228         goto out;
4229
4230 nla_put_failure:
4231         genlmsg_cancel(msg, hdr);
4232 put_failure:
4233         nlmsg_free(msg);
4234         err = -EMSGSIZE;
4235 out:
4236         mutex_unlock(&cfg80211_mutex);
4237         return err;
4238 }
4239
4240 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4241 {
4242         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4243         struct nlattr *nl_reg_rule;
4244         char *alpha2 = NULL;
4245         int rem_reg_rules = 0, r = 0;
4246         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4247         u8 dfs_region = 0;
4248         struct ieee80211_regdomain *rd = NULL;
4249
4250         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4251                 return -EINVAL;
4252
4253         if (!info->attrs[NL80211_ATTR_REG_RULES])
4254                 return -EINVAL;
4255
4256         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4257
4258         if (info->attrs[NL80211_ATTR_DFS_REGION])
4259                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4260
4261         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4262                             rem_reg_rules) {
4263                 num_rules++;
4264                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4265                         return -EINVAL;
4266         }
4267
4268         mutex_lock(&cfg80211_mutex);
4269
4270         if (!reg_is_valid_request(alpha2)) {
4271                 r = -EINVAL;
4272                 goto bad_reg;
4273         }
4274
4275         size_of_regd = sizeof(struct ieee80211_regdomain) +
4276                        num_rules * sizeof(struct ieee80211_reg_rule);
4277
4278         rd = kzalloc(size_of_regd, GFP_KERNEL);
4279         if (!rd) {
4280                 r = -ENOMEM;
4281                 goto bad_reg;
4282         }
4283
4284         rd->n_reg_rules = num_rules;
4285         rd->alpha2[0] = alpha2[0];
4286         rd->alpha2[1] = alpha2[1];
4287
4288         /*
4289          * Disable DFS master mode if the DFS region was
4290          * not supported or known on this kernel.
4291          */
4292         if (reg_supported_dfs_region(dfs_region))
4293                 rd->dfs_region = dfs_region;
4294
4295         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4296                             rem_reg_rules) {
4297                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4298                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4299                           reg_rule_policy);
4300                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4301                 if (r)
4302                         goto bad_reg;
4303
4304                 rule_idx++;
4305
4306                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4307                         r = -EINVAL;
4308                         goto bad_reg;
4309                 }
4310         }
4311
4312         r = set_regdom(rd);
4313         rd = NULL;
4314
4315  bad_reg:
4316         mutex_unlock(&cfg80211_mutex);
4317         kfree(rd);
4318         return r;
4319 }
4320
4321 static int validate_scan_freqs(struct nlattr *freqs)
4322 {
4323         struct nlattr *attr1, *attr2;
4324         int n_channels = 0, tmp1, tmp2;
4325
4326         nla_for_each_nested(attr1, freqs, tmp1) {
4327                 n_channels++;
4328                 /*
4329                  * Some hardware has a limited channel list for
4330                  * scanning, and it is pretty much nonsensical
4331                  * to scan for a channel twice, so disallow that
4332                  * and don't require drivers to check that the
4333                  * channel list they get isn't longer than what
4334                  * they can scan, as long as they can scan all
4335                  * the channels they registered at once.
4336                  */
4337                 nla_for_each_nested(attr2, freqs, tmp2)
4338                         if (attr1 != attr2 &&
4339                             nla_get_u32(attr1) == nla_get_u32(attr2))
4340                                 return 0;
4341         }
4342
4343         return n_channels;
4344 }
4345
4346 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4347 {
4348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4349         struct wireless_dev *wdev = info->user_ptr[1];
4350         struct cfg80211_scan_request *request;
4351         struct nlattr *attr;
4352         struct wiphy *wiphy;
4353         int err, tmp, n_ssids = 0, n_channels, i;
4354         size_t ie_len;
4355
4356         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4357                 return -EINVAL;
4358
4359         wiphy = &rdev->wiphy;
4360
4361         if (!rdev->ops->scan)
4362                 return -EOPNOTSUPP;
4363
4364         if (rdev->scan_req)
4365                 return -EBUSY;
4366
4367         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4368                 n_channels = validate_scan_freqs(
4369                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4370                 if (!n_channels)
4371                         return -EINVAL;
4372         } else {
4373                 enum ieee80211_band band;
4374                 n_channels = 0;
4375
4376                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4377                         if (wiphy->bands[band])
4378                                 n_channels += wiphy->bands[band]->n_channels;
4379         }
4380
4381         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4382                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4383                         n_ssids++;
4384
4385         if (n_ssids > wiphy->max_scan_ssids)
4386                 return -EINVAL;
4387
4388         if (info->attrs[NL80211_ATTR_IE])
4389                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4390         else
4391                 ie_len = 0;
4392
4393         if (ie_len > wiphy->max_scan_ie_len)
4394                 return -EINVAL;
4395
4396         request = kzalloc(sizeof(*request)
4397                         + sizeof(*request->ssids) * n_ssids
4398                         + sizeof(*request->channels) * n_channels
4399                         + ie_len, GFP_KERNEL);
4400         if (!request)
4401                 return -ENOMEM;
4402
4403         if (n_ssids)
4404                 request->ssids = (void *)&request->channels[n_channels];
4405         request->n_ssids = n_ssids;
4406         if (ie_len) {
4407                 if (request->ssids)
4408                         request->ie = (void *)(request->ssids + n_ssids);
4409                 else
4410                         request->ie = (void *)(request->channels + n_channels);
4411         }
4412
4413         i = 0;
4414         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4415                 /* user specified, bail out if channel not found */
4416                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4417                         struct ieee80211_channel *chan;
4418
4419                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4420
4421                         if (!chan) {
4422                                 err = -EINVAL;
4423                                 goto out_free;
4424                         }
4425
4426                         /* ignore disabled channels */
4427                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4428                                 continue;
4429
4430                         request->channels[i] = chan;
4431                         i++;
4432                 }
4433         } else {
4434                 enum ieee80211_band band;
4435
4436                 /* all channels */
4437                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4438                         int j;
4439                         if (!wiphy->bands[band])
4440                                 continue;
4441                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4442                                 struct ieee80211_channel *chan;
4443
4444                                 chan = &wiphy->bands[band]->channels[j];
4445
4446                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4447                                         continue;
4448
4449                                 request->channels[i] = chan;
4450                                 i++;
4451                         }
4452                 }
4453         }
4454
4455         if (!i) {
4456                 err = -EINVAL;
4457                 goto out_free;
4458         }
4459
4460         request->n_channels = i;
4461
4462         i = 0;
4463         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4464                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4465                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4466                                 err = -EINVAL;
4467                                 goto out_free;
4468                         }
4469                         request->ssids[i].ssid_len = nla_len(attr);
4470                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4471                         i++;
4472                 }
4473         }
4474
4475         if (info->attrs[NL80211_ATTR_IE]) {
4476                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4477                 memcpy((void *)request->ie,
4478                        nla_data(info->attrs[NL80211_ATTR_IE]),
4479                        request->ie_len);
4480         }
4481
4482         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4483                 if (wiphy->bands[i])
4484                         request->rates[i] =
4485                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4486
4487         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4488                 nla_for_each_nested(attr,
4489                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4490                                     tmp) {
4491                         enum ieee80211_band band = nla_type(attr);
4492
4493                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4494                                 err = -EINVAL;
4495                                 goto out_free;
4496                         }
4497                         err = ieee80211_get_ratemask(wiphy->bands[band],
4498                                                      nla_data(attr),
4499                                                      nla_len(attr),
4500                                                      &request->rates[band]);
4501                         if (err)
4502                                 goto out_free;
4503                 }
4504         }
4505
4506         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4507                 request->flags = nla_get_u32(
4508                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4509                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4510                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4511                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4512                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4513                         err = -EOPNOTSUPP;
4514                         goto out_free;
4515                 }
4516         }
4517
4518         request->no_cck =
4519                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4520
4521         request->wdev = wdev;
4522         request->wiphy = &rdev->wiphy;
4523         request->scan_start = jiffies;
4524
4525         rdev->scan_req = request;
4526         err = rdev_scan(rdev, request);
4527
4528         if (!err) {
4529                 nl80211_send_scan_start(rdev, wdev);
4530                 if (wdev->netdev)
4531                         dev_hold(wdev->netdev);
4532         } else {
4533  out_free:
4534                 rdev->scan_req = NULL;
4535                 kfree(request);
4536         }
4537
4538         return err;
4539 }
4540
4541 static int nl80211_start_sched_scan(struct sk_buff *skb,
4542                                     struct genl_info *info)
4543 {
4544         struct cfg80211_sched_scan_request *request;
4545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4546         struct net_device *dev = info->user_ptr[1];
4547         struct nlattr *attr;
4548         struct wiphy *wiphy;
4549         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4550         u32 interval;
4551         enum ieee80211_band band;
4552         size_t ie_len;
4553         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4554
4555         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4556             !rdev->ops->sched_scan_start)
4557                 return -EOPNOTSUPP;
4558
4559         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4560                 return -EINVAL;
4561
4562         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4563                 return -EINVAL;
4564
4565         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4566         if (interval == 0)
4567                 return -EINVAL;
4568
4569         wiphy = &rdev->wiphy;
4570
4571         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4572                 n_channels = validate_scan_freqs(
4573                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4574                 if (!n_channels)
4575                         return -EINVAL;
4576         } else {
4577                 n_channels = 0;
4578
4579                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4580                         if (wiphy->bands[band])
4581                                 n_channels += wiphy->bands[band]->n_channels;
4582         }
4583
4584         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4585                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4586                                     tmp)
4587                         n_ssids++;
4588
4589         if (n_ssids > wiphy->max_sched_scan_ssids)
4590                 return -EINVAL;
4591
4592         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4593                 nla_for_each_nested(attr,
4594                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4595                                     tmp)
4596                         n_match_sets++;
4597
4598         if (n_match_sets > wiphy->max_match_sets)
4599                 return -EINVAL;
4600
4601         if (info->attrs[NL80211_ATTR_IE])
4602                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4603         else
4604                 ie_len = 0;
4605
4606         if (ie_len > wiphy->max_sched_scan_ie_len)
4607                 return -EINVAL;
4608
4609         mutex_lock(&rdev->sched_scan_mtx);
4610
4611         if (rdev->sched_scan_req) {
4612                 err = -EINPROGRESS;
4613                 goto out;
4614         }
4615
4616         request = kzalloc(sizeof(*request)
4617                         + sizeof(*request->ssids) * n_ssids
4618                         + sizeof(*request->match_sets) * n_match_sets
4619                         + sizeof(*request->channels) * n_channels
4620                         + ie_len, GFP_KERNEL);
4621         if (!request) {
4622                 err = -ENOMEM;
4623                 goto out;
4624         }
4625
4626         if (n_ssids)
4627                 request->ssids = (void *)&request->channels[n_channels];
4628         request->n_ssids = n_ssids;
4629         if (ie_len) {
4630                 if (request->ssids)
4631                         request->ie = (void *)(request->ssids + n_ssids);
4632                 else
4633                         request->ie = (void *)(request->channels + n_channels);
4634         }
4635
4636         if (n_match_sets) {
4637                 if (request->ie)
4638                         request->match_sets = (void *)(request->ie + ie_len);
4639                 else if (request->ssids)
4640                         request->match_sets =
4641                                 (void *)(request->ssids + n_ssids);
4642                 else
4643                         request->match_sets =
4644                                 (void *)(request->channels + n_channels);
4645         }
4646         request->n_match_sets = n_match_sets;
4647
4648         i = 0;
4649         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4650                 /* user specified, bail out if channel not found */
4651                 nla_for_each_nested(attr,
4652                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4653                                     tmp) {
4654                         struct ieee80211_channel *chan;
4655
4656                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4657
4658                         if (!chan) {
4659                                 err = -EINVAL;
4660                                 goto out_free;
4661                         }
4662
4663                         /* ignore disabled channels */
4664                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4665                                 continue;
4666
4667                         request->channels[i] = chan;
4668                         i++;
4669                 }
4670         } else {
4671                 /* all channels */
4672                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4673                         int j;
4674                         if (!wiphy->bands[band])
4675                                 continue;
4676                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4677                                 struct ieee80211_channel *chan;
4678
4679                                 chan = &wiphy->bands[band]->channels[j];
4680
4681                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4682                                         continue;
4683
4684                                 request->channels[i] = chan;
4685                                 i++;
4686                         }
4687                 }
4688         }
4689
4690         if (!i) {
4691                 err = -EINVAL;
4692                 goto out_free;
4693         }
4694
4695         request->n_channels = i;
4696
4697         i = 0;
4698         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4699                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4700                                     tmp) {
4701                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4702                                 err = -EINVAL;
4703                                 goto out_free;
4704                         }
4705                         request->ssids[i].ssid_len = nla_len(attr);
4706                         memcpy(request->ssids[i].ssid, nla_data(attr),
4707                                nla_len(attr));
4708                         i++;
4709                 }
4710         }
4711
4712         i = 0;
4713         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4714                 nla_for_each_nested(attr,
4715                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4716                                     tmp) {
4717                         struct nlattr *ssid, *rssi;
4718
4719                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4720                                   nla_data(attr), nla_len(attr),
4721                                   nl80211_match_policy);
4722                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4723                         if (ssid) {
4724                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4725                                         err = -EINVAL;
4726                                         goto out_free;
4727                                 }
4728                                 memcpy(request->match_sets[i].ssid.ssid,
4729                                        nla_data(ssid), nla_len(ssid));
4730                                 request->match_sets[i].ssid.ssid_len =
4731                                         nla_len(ssid);
4732                         }
4733                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4734                         if (rssi)
4735                                 request->rssi_thold = nla_get_u32(rssi);
4736                         else
4737                                 request->rssi_thold =
4738                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4739                         i++;
4740                 }
4741         }
4742
4743         if (info->attrs[NL80211_ATTR_IE]) {
4744                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4745                 memcpy((void *)request->ie,
4746                        nla_data(info->attrs[NL80211_ATTR_IE]),
4747                        request->ie_len);
4748         }
4749
4750         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4751                 request->flags = nla_get_u32(
4752                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4753                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4754                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4755                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4756                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4757                         err = -EOPNOTSUPP;
4758                         goto out_free;
4759                 }
4760         }
4761
4762         request->dev = dev;
4763         request->wiphy = &rdev->wiphy;
4764         request->interval = interval;
4765         request->scan_start = jiffies;
4766
4767         err = rdev_sched_scan_start(rdev, dev, request);
4768         if (!err) {
4769                 rdev->sched_scan_req = request;
4770                 nl80211_send_sched_scan(rdev, dev,
4771                                         NL80211_CMD_START_SCHED_SCAN);
4772                 goto out;
4773         }
4774
4775 out_free:
4776         kfree(request);
4777 out:
4778         mutex_unlock(&rdev->sched_scan_mtx);
4779         return err;
4780 }
4781
4782 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4783                                    struct genl_info *info)
4784 {
4785         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4786         int err;
4787
4788         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4789             !rdev->ops->sched_scan_stop)
4790                 return -EOPNOTSUPP;
4791
4792         mutex_lock(&rdev->sched_scan_mtx);
4793         err = __cfg80211_stop_sched_scan(rdev, false);
4794         mutex_unlock(&rdev->sched_scan_mtx);
4795
4796         return err;
4797 }
4798
4799 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4800                             u32 seq, int flags,
4801                             struct cfg80211_registered_device *rdev,
4802                             struct wireless_dev *wdev,
4803                             struct cfg80211_internal_bss *intbss)
4804 {
4805         struct cfg80211_bss *res = &intbss->pub;
4806         const struct cfg80211_bss_ies *ies;
4807         void *hdr;
4808         struct nlattr *bss;
4809
4810         ASSERT_WDEV_LOCK(wdev);
4811
4812         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
4813                              NL80211_CMD_NEW_SCAN_RESULTS);
4814         if (!hdr)
4815                 return -1;
4816
4817         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4818
4819         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4820             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4821                 goto nla_put_failure;
4822
4823         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4824         if (!bss)
4825                 goto nla_put_failure;
4826         if ((!is_zero_ether_addr(res->bssid) &&
4827              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
4828                 goto nla_put_failure;
4829
4830         rcu_read_lock();
4831         ies = rcu_dereference(res->ies);
4832         if (ies && ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4833                                        ies->len, ies->data)) {
4834                 rcu_read_unlock();
4835                 goto nla_put_failure;
4836         }
4837         ies = rcu_dereference(res->beacon_ies);
4838         if (ies && ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
4839                                        ies->len, ies->data)) {
4840                 rcu_read_unlock();
4841                 goto nla_put_failure;
4842         }
4843         rcu_read_unlock();
4844
4845         if (res->tsf &&
4846             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4847                 goto nla_put_failure;
4848         if (res->beacon_interval &&
4849             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4850                 goto nla_put_failure;
4851         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4852             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4853             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4854                         jiffies_to_msecs(jiffies - intbss->ts)))
4855                 goto nla_put_failure;
4856
4857         switch (rdev->wiphy.signal_type) {
4858         case CFG80211_SIGNAL_TYPE_MBM:
4859                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4860                         goto nla_put_failure;
4861                 break;
4862         case CFG80211_SIGNAL_TYPE_UNSPEC:
4863                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4864                         goto nla_put_failure;
4865                 break;
4866         default:
4867                 break;
4868         }
4869
4870         switch (wdev->iftype) {
4871         case NL80211_IFTYPE_P2P_CLIENT:
4872         case NL80211_IFTYPE_STATION:
4873                 if (intbss == wdev->current_bss &&
4874                     nla_put_u32(msg, NL80211_BSS_STATUS,
4875                                 NL80211_BSS_STATUS_ASSOCIATED))
4876                         goto nla_put_failure;
4877                 break;
4878         case NL80211_IFTYPE_ADHOC:
4879                 if (intbss == wdev->current_bss &&
4880                     nla_put_u32(msg, NL80211_BSS_STATUS,
4881                                 NL80211_BSS_STATUS_IBSS_JOINED))
4882                         goto nla_put_failure;
4883                 break;
4884         default:
4885                 break;
4886         }
4887
4888         nla_nest_end(msg, bss);
4889
4890         return genlmsg_end(msg, hdr);
4891
4892  nla_put_failure:
4893         genlmsg_cancel(msg, hdr);
4894         return -EMSGSIZE;
4895 }
4896
4897 static int nl80211_dump_scan(struct sk_buff *skb,
4898                              struct netlink_callback *cb)
4899 {
4900         struct cfg80211_registered_device *rdev;
4901         struct net_device *dev;
4902         struct cfg80211_internal_bss *scan;
4903         struct wireless_dev *wdev;
4904         int start = cb->args[1], idx = 0;
4905         int err;
4906
4907         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4908         if (err)
4909                 return err;
4910
4911         wdev = dev->ieee80211_ptr;
4912
4913         wdev_lock(wdev);
4914         spin_lock_bh(&rdev->bss_lock);
4915         cfg80211_bss_expire(rdev);
4916
4917         cb->seq = rdev->bss_generation;
4918
4919         list_for_each_entry(scan, &rdev->bss_list, list) {
4920                 if (++idx <= start)
4921                         continue;
4922                 if (nl80211_send_bss(skb, cb,
4923                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4924                                 rdev, wdev, scan) < 0) {
4925                         idx--;
4926                         break;
4927                 }
4928         }
4929
4930         spin_unlock_bh(&rdev->bss_lock);
4931         wdev_unlock(wdev);
4932
4933         cb->args[1] = idx;
4934         nl80211_finish_netdev_dump(rdev);
4935
4936         return skb->len;
4937 }
4938
4939 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
4940                                 int flags, struct net_device *dev,
4941                                 struct survey_info *survey)
4942 {
4943         void *hdr;
4944         struct nlattr *infoattr;
4945
4946         hdr = nl80211hdr_put(msg, portid, seq, flags,
4947                              NL80211_CMD_NEW_SURVEY_RESULTS);
4948         if (!hdr)
4949                 return -ENOMEM;
4950
4951         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4952                 goto nla_put_failure;
4953
4954         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4955         if (!infoattr)
4956                 goto nla_put_failure;
4957
4958         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4959                         survey->channel->center_freq))
4960                 goto nla_put_failure;
4961
4962         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4963             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4964                 goto nla_put_failure;
4965         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4966             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4967                 goto nla_put_failure;
4968         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4969             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4970                         survey->channel_time))
4971                 goto nla_put_failure;
4972         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4973             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4974                         survey->channel_time_busy))
4975                 goto nla_put_failure;
4976         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4977             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4978                         survey->channel_time_ext_busy))
4979                 goto nla_put_failure;
4980         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4981             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4982                         survey->channel_time_rx))
4983                 goto nla_put_failure;
4984         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4985             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4986                         survey->channel_time_tx))
4987                 goto nla_put_failure;
4988
4989         nla_nest_end(msg, infoattr);
4990
4991         return genlmsg_end(msg, hdr);
4992
4993  nla_put_failure:
4994         genlmsg_cancel(msg, hdr);
4995         return -EMSGSIZE;
4996 }
4997
4998 static int nl80211_dump_survey(struct sk_buff *skb,
4999                         struct netlink_callback *cb)
5000 {
5001         struct survey_info survey;
5002         struct cfg80211_registered_device *dev;
5003         struct net_device *netdev;
5004         int survey_idx = cb->args[1];
5005         int res;
5006
5007         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5008         if (res)
5009                 return res;
5010
5011         if (!dev->ops->dump_survey) {
5012                 res = -EOPNOTSUPP;
5013                 goto out_err;
5014         }
5015
5016         while (1) {
5017                 struct ieee80211_channel *chan;
5018
5019                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5020                 if (res == -ENOENT)
5021                         break;
5022                 if (res)
5023                         goto out_err;
5024
5025                 /* Survey without a channel doesn't make sense */
5026                 if (!survey.channel) {
5027                         res = -EINVAL;
5028                         goto out;
5029                 }
5030
5031                 chan = ieee80211_get_channel(&dev->wiphy,
5032                                              survey.channel->center_freq);
5033                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5034                         survey_idx++;
5035                         continue;
5036                 }
5037
5038                 if (nl80211_send_survey(skb,
5039                                 NETLINK_CB(cb->skb).portid,
5040                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5041                                 netdev,
5042                                 &survey) < 0)
5043                         goto out;
5044                 survey_idx++;
5045         }
5046
5047  out:
5048         cb->args[1] = survey_idx;
5049         res = skb->len;
5050  out_err:
5051         nl80211_finish_netdev_dump(dev);
5052         return res;
5053 }
5054
5055 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5056 {
5057         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5058                                   NL80211_WPA_VERSION_2));
5059 }
5060
5061 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5062 {
5063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5064         struct net_device *dev = info->user_ptr[1];
5065         struct ieee80211_channel *chan;
5066         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5067         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5068         enum nl80211_auth_type auth_type;
5069         struct key_parse key;
5070         bool local_state_change;
5071
5072         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5073                 return -EINVAL;
5074
5075         if (!info->attrs[NL80211_ATTR_MAC])
5076                 return -EINVAL;
5077
5078         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5079                 return -EINVAL;
5080
5081         if (!info->attrs[NL80211_ATTR_SSID])
5082                 return -EINVAL;
5083
5084         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5085                 return -EINVAL;
5086
5087         err = nl80211_parse_key(info, &key);
5088         if (err)
5089                 return err;
5090
5091         if (key.idx >= 0) {
5092                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5093                         return -EINVAL;
5094                 if (!key.p.key || !key.p.key_len)
5095                         return -EINVAL;
5096                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5097                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5098                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5099                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5100                         return -EINVAL;
5101                 if (key.idx > 4)
5102                         return -EINVAL;
5103         } else {
5104                 key.p.key_len = 0;
5105                 key.p.key = NULL;
5106         }
5107
5108         if (key.idx >= 0) {
5109                 int i;
5110                 bool ok = false;
5111                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5112                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5113                                 ok = true;
5114                                 break;
5115                         }
5116                 }
5117                 if (!ok)
5118                         return -EINVAL;
5119         }
5120
5121         if (!rdev->ops->auth)
5122                 return -EOPNOTSUPP;
5123
5124         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5125             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5126                 return -EOPNOTSUPP;
5127
5128         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5129         chan = ieee80211_get_channel(&rdev->wiphy,
5130                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5131         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5132                 return -EINVAL;
5133
5134         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5135         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5136
5137         if (info->attrs[NL80211_ATTR_IE]) {
5138                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5139                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5140         }
5141
5142         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5143         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5144                 return -EINVAL;
5145
5146         if (auth_type == NL80211_AUTHTYPE_SAE &&
5147             !info->attrs[NL80211_ATTR_SAE_DATA])
5148                 return -EINVAL;
5149
5150         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5151                 if (auth_type != NL80211_AUTHTYPE_SAE)
5152                         return -EINVAL;
5153                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5154                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5155                 /* need to include at least Auth Transaction and Status Code */
5156                 if (sae_data_len < 4)
5157                         return -EINVAL;
5158         }
5159
5160         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5161
5162         /*
5163          * Since we no longer track auth state, ignore
5164          * requests to only change local state.
5165          */
5166         if (local_state_change)
5167                 return 0;
5168
5169         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5170                                   ssid, ssid_len, ie, ie_len,
5171                                   key.p.key, key.p.key_len, key.idx,
5172                                   sae_data, sae_data_len);
5173 }
5174
5175 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5176                                    struct genl_info *info,
5177                                    struct cfg80211_crypto_settings *settings,
5178                                    int cipher_limit)
5179 {
5180         memset(settings, 0, sizeof(*settings));
5181
5182         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5183
5184         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5185                 u16 proto;
5186                 proto = nla_get_u16(
5187                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5188                 settings->control_port_ethertype = cpu_to_be16(proto);
5189                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5190                     proto != ETH_P_PAE)
5191                         return -EINVAL;
5192                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5193                         settings->control_port_no_encrypt = true;
5194         } else
5195                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5196
5197         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5198                 void *data;
5199                 int len, i;
5200
5201                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5202                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5203                 settings->n_ciphers_pairwise = len / sizeof(u32);
5204
5205                 if (len % sizeof(u32))
5206                         return -EINVAL;
5207
5208                 if (settings->n_ciphers_pairwise > cipher_limit)
5209                         return -EINVAL;
5210
5211                 memcpy(settings->ciphers_pairwise, data, len);
5212
5213                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5214                         if (!cfg80211_supported_cipher_suite(
5215                                         &rdev->wiphy,
5216                                         settings->ciphers_pairwise[i]))
5217                                 return -EINVAL;
5218         }
5219
5220         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5221                 settings->cipher_group =
5222                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5223                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5224                                                      settings->cipher_group))
5225                         return -EINVAL;
5226         }
5227
5228         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5229                 settings->wpa_versions =
5230                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5231                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5232                         return -EINVAL;
5233         }
5234
5235         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5236                 void *data;
5237                 int len;
5238
5239                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5240                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5241                 settings->n_akm_suites = len / sizeof(u32);
5242
5243                 if (len % sizeof(u32))
5244                         return -EINVAL;
5245
5246                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5247                         return -EINVAL;
5248
5249                 memcpy(settings->akm_suites, data, len);
5250         }
5251
5252         return 0;
5253 }
5254
5255 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5256 {
5257         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5258         struct net_device *dev = info->user_ptr[1];
5259         struct cfg80211_crypto_settings crypto;
5260         struct ieee80211_channel *chan;
5261         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5262         int err, ssid_len, ie_len = 0;
5263         bool use_mfp = false;
5264         u32 flags = 0;
5265         struct ieee80211_ht_cap *ht_capa = NULL;
5266         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5267
5268         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5269                 return -EINVAL;
5270
5271         if (!info->attrs[NL80211_ATTR_MAC] ||
5272             !info->attrs[NL80211_ATTR_SSID] ||
5273             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5274                 return -EINVAL;
5275
5276         if (!rdev->ops->assoc)
5277                 return -EOPNOTSUPP;
5278
5279         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5280             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5281                 return -EOPNOTSUPP;
5282
5283         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5284
5285         chan = ieee80211_get_channel(&rdev->wiphy,
5286                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5287         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5288                 return -EINVAL;
5289
5290         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5291         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5292
5293         if (info->attrs[NL80211_ATTR_IE]) {
5294                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5295                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5296         }
5297
5298         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5299                 enum nl80211_mfp mfp =
5300                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5301                 if (mfp == NL80211_MFP_REQUIRED)
5302                         use_mfp = true;
5303                 else if (mfp != NL80211_MFP_NO)
5304                         return -EINVAL;
5305         }
5306
5307         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5308                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5309
5310         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5311                 flags |= ASSOC_REQ_DISABLE_HT;
5312
5313         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5314                 ht_capa_mask =
5315                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5316
5317         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5318                 if (!ht_capa_mask)
5319                         return -EINVAL;
5320                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5321         }
5322
5323         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5324         if (!err)
5325                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5326                                           ssid, ssid_len, ie, ie_len, use_mfp,
5327                                           &crypto, flags, ht_capa,
5328                                           ht_capa_mask);
5329
5330         return err;
5331 }
5332
5333 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5334 {
5335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5336         struct net_device *dev = info->user_ptr[1];
5337         const u8 *ie = NULL, *bssid;
5338         int ie_len = 0;
5339         u16 reason_code;
5340         bool local_state_change;
5341
5342         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5343                 return -EINVAL;
5344
5345         if (!info->attrs[NL80211_ATTR_MAC])
5346                 return -EINVAL;
5347
5348         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5349                 return -EINVAL;
5350
5351         if (!rdev->ops->deauth)
5352                 return -EOPNOTSUPP;
5353
5354         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5355             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5356                 return -EOPNOTSUPP;
5357
5358         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5359
5360         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5361         if (reason_code == 0) {
5362                 /* Reason Code 0 is reserved */
5363                 return -EINVAL;
5364         }
5365
5366         if (info->attrs[NL80211_ATTR_IE]) {
5367                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5368                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5369         }
5370
5371         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5372
5373         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5374                                     local_state_change);
5375 }
5376
5377 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5378 {
5379         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5380         struct net_device *dev = info->user_ptr[1];
5381         const u8 *ie = NULL, *bssid;
5382         int ie_len = 0;
5383         u16 reason_code;
5384         bool local_state_change;
5385
5386         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5387                 return -EINVAL;
5388
5389         if (!info->attrs[NL80211_ATTR_MAC])
5390                 return -EINVAL;
5391
5392         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5393                 return -EINVAL;
5394
5395         if (!rdev->ops->disassoc)
5396                 return -EOPNOTSUPP;
5397
5398         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5399             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5400                 return -EOPNOTSUPP;
5401
5402         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5403
5404         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5405         if (reason_code == 0) {
5406                 /* Reason Code 0 is reserved */
5407                 return -EINVAL;
5408         }
5409
5410         if (info->attrs[NL80211_ATTR_IE]) {
5411                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5412                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5413         }
5414
5415         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5416
5417         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5418                                       local_state_change);
5419 }
5420
5421 static bool
5422 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5423                          int mcast_rate[IEEE80211_NUM_BANDS],
5424                          int rateval)
5425 {
5426         struct wiphy *wiphy = &rdev->wiphy;
5427         bool found = false;
5428         int band, i;
5429
5430         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5431                 struct ieee80211_supported_band *sband;
5432
5433                 sband = wiphy->bands[band];
5434                 if (!sband)
5435                         continue;
5436
5437                 for (i = 0; i < sband->n_bitrates; i++) {
5438                         if (sband->bitrates[i].bitrate == rateval) {
5439                                 mcast_rate[band] = i + 1;
5440                                 found = true;
5441                                 break;
5442                         }
5443                 }
5444         }
5445
5446         return found;
5447 }
5448
5449 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5450 {
5451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5452         struct net_device *dev = info->user_ptr[1];
5453         struct cfg80211_ibss_params ibss;
5454         struct wiphy *wiphy;
5455         struct cfg80211_cached_keys *connkeys = NULL;
5456         int err;
5457
5458         memset(&ibss, 0, sizeof(ibss));
5459
5460         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5461                 return -EINVAL;
5462
5463         if (!info->attrs[NL80211_ATTR_SSID] ||
5464             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5465                 return -EINVAL;
5466
5467         ibss.beacon_interval = 100;
5468
5469         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5470                 ibss.beacon_interval =
5471                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5472                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5473                         return -EINVAL;
5474         }
5475
5476         if (!rdev->ops->join_ibss)
5477                 return -EOPNOTSUPP;
5478
5479         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5480                 return -EOPNOTSUPP;
5481
5482         wiphy = &rdev->wiphy;
5483
5484         if (info->attrs[NL80211_ATTR_MAC]) {
5485                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5486
5487                 if (!is_valid_ether_addr(ibss.bssid))
5488                         return -EINVAL;
5489         }
5490         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5491         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5492
5493         if (info->attrs[NL80211_ATTR_IE]) {
5494                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5495                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5496         }
5497
5498         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5499         if (err)
5500                 return err;
5501
5502         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5503                 return -EINVAL;
5504
5505         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5506                 return -EINVAL;
5507         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5508             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5509                 return -EINVAL;
5510
5511         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5512         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5513
5514         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5515                 u8 *rates =
5516                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5517                 int n_rates =
5518                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5519                 struct ieee80211_supported_band *sband =
5520                         wiphy->bands[ibss.chandef.chan->band];
5521
5522                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5523                                              &ibss.basic_rates);
5524                 if (err)
5525                         return err;
5526         }
5527
5528         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5529             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5530                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5531                 return -EINVAL;
5532
5533         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5534                 bool no_ht = false;
5535
5536                 connkeys = nl80211_parse_connkeys(rdev,
5537                                           info->attrs[NL80211_ATTR_KEYS],
5538                                           &no_ht);
5539                 if (IS_ERR(connkeys))
5540                         return PTR_ERR(connkeys);
5541
5542                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5543                     no_ht) {
5544                         kfree(connkeys);
5545                         return -EINVAL;
5546                 }
5547         }
5548
5549         ibss.control_port =
5550                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5551
5552         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5553         if (err)
5554                 kfree(connkeys);
5555         return err;
5556 }
5557
5558 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5559 {
5560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5561         struct net_device *dev = info->user_ptr[1];
5562
5563         if (!rdev->ops->leave_ibss)
5564                 return -EOPNOTSUPP;
5565
5566         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5567                 return -EOPNOTSUPP;
5568
5569         return cfg80211_leave_ibss(rdev, dev, false);
5570 }
5571
5572 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5573 {
5574         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5575         struct net_device *dev = info->user_ptr[1];
5576         int mcast_rate[IEEE80211_NUM_BANDS];
5577         u32 nla_rate;
5578         int err;
5579
5580         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5581             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5582                 return -EOPNOTSUPP;
5583
5584         if (!rdev->ops->set_mcast_rate)
5585                 return -EOPNOTSUPP;
5586
5587         memset(mcast_rate, 0, sizeof(mcast_rate));
5588
5589         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5590                 return -EINVAL;
5591
5592         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5593         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5594                 return -EINVAL;
5595
5596         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5597
5598         return err;
5599 }
5600
5601
5602 #ifdef CONFIG_NL80211_TESTMODE
5603 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5604         .name = "testmode",
5605 };
5606
5607 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5608 {
5609         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5610         int err;
5611
5612         if (!info->attrs[NL80211_ATTR_TESTDATA])
5613                 return -EINVAL;
5614
5615         err = -EOPNOTSUPP;
5616         if (rdev->ops->testmode_cmd) {
5617                 rdev->testmode_info = info;
5618                 err = rdev_testmode_cmd(rdev,
5619                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5620                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5621                 rdev->testmode_info = NULL;
5622         }
5623
5624         return err;
5625 }
5626
5627 static int nl80211_testmode_dump(struct sk_buff *skb,
5628                                  struct netlink_callback *cb)
5629 {
5630         struct cfg80211_registered_device *rdev;
5631         int err;
5632         long phy_idx;
5633         void *data = NULL;
5634         int data_len = 0;
5635
5636         if (cb->args[0]) {
5637                 /*
5638                  * 0 is a valid index, but not valid for args[0],
5639                  * so we need to offset by 1.
5640                  */
5641                 phy_idx = cb->args[0] - 1;
5642         } else {
5643                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5644                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5645                                   nl80211_policy);
5646                 if (err)
5647                         return err;
5648
5649                 mutex_lock(&cfg80211_mutex);
5650                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5651                                                   nl80211_fam.attrbuf);
5652                 if (IS_ERR(rdev)) {
5653                         mutex_unlock(&cfg80211_mutex);
5654                         return PTR_ERR(rdev);
5655                 }
5656                 phy_idx = rdev->wiphy_idx;
5657                 rdev = NULL;
5658                 mutex_unlock(&cfg80211_mutex);
5659
5660                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5661                         cb->args[1] =
5662                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5663         }
5664
5665         if (cb->args[1]) {
5666                 data = nla_data((void *)cb->args[1]);
5667                 data_len = nla_len((void *)cb->args[1]);
5668         }
5669
5670         mutex_lock(&cfg80211_mutex);
5671         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5672         if (!rdev) {
5673                 mutex_unlock(&cfg80211_mutex);
5674                 return -ENOENT;
5675         }
5676         cfg80211_lock_rdev(rdev);
5677         mutex_unlock(&cfg80211_mutex);
5678
5679         if (!rdev->ops->testmode_dump) {
5680                 err = -EOPNOTSUPP;
5681                 goto out_err;
5682         }
5683
5684         while (1) {
5685                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
5686                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5687                                            NL80211_CMD_TESTMODE);
5688                 struct nlattr *tmdata;
5689
5690                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5691                         genlmsg_cancel(skb, hdr);
5692                         break;
5693                 }
5694
5695                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5696                 if (!tmdata) {
5697                         genlmsg_cancel(skb, hdr);
5698                         break;
5699                 }
5700                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
5701                 nla_nest_end(skb, tmdata);
5702
5703                 if (err == -ENOBUFS || err == -ENOENT) {
5704                         genlmsg_cancel(skb, hdr);
5705                         break;
5706                 } else if (err) {
5707                         genlmsg_cancel(skb, hdr);
5708                         goto out_err;
5709                 }
5710
5711                 genlmsg_end(skb, hdr);
5712         }
5713
5714         err = skb->len;
5715         /* see above */
5716         cb->args[0] = phy_idx + 1;
5717  out_err:
5718         cfg80211_unlock_rdev(rdev);
5719         return err;
5720 }
5721
5722 static struct sk_buff *
5723 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5724                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
5725 {
5726         struct sk_buff *skb;
5727         void *hdr;
5728         struct nlattr *data;
5729
5730         skb = nlmsg_new(approxlen + 100, gfp);
5731         if (!skb)
5732                 return NULL;
5733
5734         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
5735         if (!hdr) {
5736                 kfree_skb(skb);
5737                 return NULL;
5738         }
5739
5740         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5741                 goto nla_put_failure;
5742         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5743
5744         ((void **)skb->cb)[0] = rdev;
5745         ((void **)skb->cb)[1] = hdr;
5746         ((void **)skb->cb)[2] = data;
5747
5748         return skb;
5749
5750  nla_put_failure:
5751         kfree_skb(skb);
5752         return NULL;
5753 }
5754
5755 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5756                                                   int approxlen)
5757 {
5758         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5759
5760         if (WARN_ON(!rdev->testmode_info))
5761                 return NULL;
5762
5763         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5764                                 rdev->testmode_info->snd_portid,
5765                                 rdev->testmode_info->snd_seq,
5766                                 GFP_KERNEL);
5767 }
5768 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5769
5770 int cfg80211_testmode_reply(struct sk_buff *skb)
5771 {
5772         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5773         void *hdr = ((void **)skb->cb)[1];
5774         struct nlattr *data = ((void **)skb->cb)[2];
5775
5776         if (WARN_ON(!rdev->testmode_info)) {
5777                 kfree_skb(skb);
5778                 return -EINVAL;
5779         }
5780
5781         nla_nest_end(skb, data);
5782         genlmsg_end(skb, hdr);
5783         return genlmsg_reply(skb, rdev->testmode_info);
5784 }
5785 EXPORT_SYMBOL(cfg80211_testmode_reply);
5786
5787 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5788                                                   int approxlen, gfp_t gfp)
5789 {
5790         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5791
5792         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5793 }
5794 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5795
5796 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5797 {
5798         void *hdr = ((void **)skb->cb)[1];
5799         struct nlattr *data = ((void **)skb->cb)[2];
5800
5801         nla_nest_end(skb, data);
5802         genlmsg_end(skb, hdr);
5803         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5804 }
5805 EXPORT_SYMBOL(cfg80211_testmode_event);
5806 #endif
5807
5808 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5809 {
5810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5811         struct net_device *dev = info->user_ptr[1];
5812         struct cfg80211_connect_params connect;
5813         struct wiphy *wiphy;
5814         struct cfg80211_cached_keys *connkeys = NULL;
5815         int err;
5816
5817         memset(&connect, 0, sizeof(connect));
5818
5819         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5820                 return -EINVAL;
5821
5822         if (!info->attrs[NL80211_ATTR_SSID] ||
5823             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5824                 return -EINVAL;
5825
5826         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5827                 connect.auth_type =
5828                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5829                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
5830                                              NL80211_CMD_CONNECT))
5831                         return -EINVAL;
5832         } else
5833                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5834
5835         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5836
5837         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5838                                       NL80211_MAX_NR_CIPHER_SUITES);
5839         if (err)
5840                 return err;
5841
5842         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5843             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5844                 return -EOPNOTSUPP;
5845
5846         wiphy = &rdev->wiphy;
5847
5848         connect.bg_scan_period = -1;
5849         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5850                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5851                 connect.bg_scan_period =
5852                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5853         }
5854
5855         if (info->attrs[NL80211_ATTR_MAC])
5856                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5857         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5858         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5859
5860         if (info->attrs[NL80211_ATTR_IE]) {
5861                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5862                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5863         }
5864
5865         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5866                 connect.channel =
5867                         ieee80211_get_channel(wiphy,
5868                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5869                 if (!connect.channel ||
5870                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5871                         return -EINVAL;
5872         }
5873
5874         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5875                 connkeys = nl80211_parse_connkeys(rdev,
5876                                           info->attrs[NL80211_ATTR_KEYS], NULL);
5877                 if (IS_ERR(connkeys))
5878                         return PTR_ERR(connkeys);
5879         }
5880
5881         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5882                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5883
5884         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5885                 memcpy(&connect.ht_capa_mask,
5886                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5887                        sizeof(connect.ht_capa_mask));
5888
5889         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5890                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
5891                         kfree(connkeys);
5892                         return -EINVAL;
5893                 }
5894                 memcpy(&connect.ht_capa,
5895                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5896                        sizeof(connect.ht_capa));
5897         }
5898
5899         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5900         if (err)
5901                 kfree(connkeys);
5902         return err;
5903 }
5904
5905 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5906 {
5907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5908         struct net_device *dev = info->user_ptr[1];
5909         u16 reason;
5910
5911         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5912                 reason = WLAN_REASON_DEAUTH_LEAVING;
5913         else
5914                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5915
5916         if (reason == 0)
5917                 return -EINVAL;
5918
5919         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5920             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5921                 return -EOPNOTSUPP;
5922
5923         return cfg80211_disconnect(rdev, dev, reason, true);
5924 }
5925
5926 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5927 {
5928         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5929         struct net *net;
5930         int err;
5931         u32 pid;
5932
5933         if (!info->attrs[NL80211_ATTR_PID])
5934                 return -EINVAL;
5935
5936         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5937
5938         net = get_net_ns_by_pid(pid);
5939         if (IS_ERR(net))
5940                 return PTR_ERR(net);
5941
5942         err = 0;
5943
5944         /* check if anything to do */
5945         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5946                 err = cfg80211_switch_netns(rdev, net);
5947
5948         put_net(net);
5949         return err;
5950 }
5951
5952 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5953 {
5954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5955         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5956                         struct cfg80211_pmksa *pmksa) = NULL;
5957         struct net_device *dev = info->user_ptr[1];
5958         struct cfg80211_pmksa pmksa;
5959
5960         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5961
5962         if (!info->attrs[NL80211_ATTR_MAC])
5963                 return -EINVAL;
5964
5965         if (!info->attrs[NL80211_ATTR_PMKID])
5966                 return -EINVAL;
5967
5968         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5969         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5970
5971         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5973                 return -EOPNOTSUPP;
5974
5975         switch (info->genlhdr->cmd) {
5976         case NL80211_CMD_SET_PMKSA:
5977                 rdev_ops = rdev->ops->set_pmksa;
5978                 break;
5979         case NL80211_CMD_DEL_PMKSA:
5980                 rdev_ops = rdev->ops->del_pmksa;
5981                 break;
5982         default:
5983                 WARN_ON(1);
5984                 break;
5985         }
5986
5987         if (!rdev_ops)
5988                 return -EOPNOTSUPP;
5989
5990         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5991 }
5992
5993 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5994 {
5995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5996         struct net_device *dev = info->user_ptr[1];
5997
5998         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5999             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6000                 return -EOPNOTSUPP;
6001
6002         if (!rdev->ops->flush_pmksa)
6003                 return -EOPNOTSUPP;
6004
6005         return rdev_flush_pmksa(rdev, dev);
6006 }
6007
6008 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6009 {
6010         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6011         struct net_device *dev = info->user_ptr[1];
6012         u8 action_code, dialog_token;
6013         u16 status_code;
6014         u8 *peer;
6015
6016         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6017             !rdev->ops->tdls_mgmt)
6018                 return -EOPNOTSUPP;
6019
6020         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6021             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6022             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6023             !info->attrs[NL80211_ATTR_IE] ||
6024             !info->attrs[NL80211_ATTR_MAC])
6025                 return -EINVAL;
6026
6027         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6028         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6029         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6030         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6031
6032         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6033                               dialog_token, status_code,
6034                               nla_data(info->attrs[NL80211_ATTR_IE]),
6035                               nla_len(info->attrs[NL80211_ATTR_IE]));
6036 }
6037
6038 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6039 {
6040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6041         struct net_device *dev = info->user_ptr[1];
6042         enum nl80211_tdls_operation operation;
6043         u8 *peer;
6044
6045         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6046             !rdev->ops->tdls_oper)
6047                 return -EOPNOTSUPP;
6048
6049         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6050             !info->attrs[NL80211_ATTR_MAC])
6051                 return -EINVAL;
6052
6053         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6054         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6055
6056         return rdev_tdls_oper(rdev, dev, peer, operation);
6057 }
6058
6059 static int nl80211_remain_on_channel(struct sk_buff *skb,
6060                                      struct genl_info *info)
6061 {
6062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6063         struct wireless_dev *wdev = info->user_ptr[1];
6064         struct cfg80211_chan_def chandef;
6065         struct sk_buff *msg;
6066         void *hdr;
6067         u64 cookie;
6068         u32 duration;
6069         int err;
6070
6071         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6072             !info->attrs[NL80211_ATTR_DURATION])
6073                 return -EINVAL;
6074
6075         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6076
6077         if (!rdev->ops->remain_on_channel ||
6078             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6079                 return -EOPNOTSUPP;
6080
6081         /*
6082          * We should be on that channel for at least a minimum amount of
6083          * time (10ms) but no longer than the driver supports.
6084          */
6085         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6086             duration > rdev->wiphy.max_remain_on_channel_duration)
6087                 return -EINVAL;
6088
6089         err = nl80211_parse_chandef(rdev, info, &chandef);
6090         if (err)
6091                 return err;
6092
6093         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6094         if (!msg)
6095                 return -ENOMEM;
6096
6097         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6098                              NL80211_CMD_REMAIN_ON_CHANNEL);
6099
6100         if (IS_ERR(hdr)) {
6101                 err = PTR_ERR(hdr);
6102                 goto free_msg;
6103         }
6104
6105         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6106                                      duration, &cookie);
6107
6108         if (err)
6109                 goto free_msg;
6110
6111         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6112                 goto nla_put_failure;
6113
6114         genlmsg_end(msg, hdr);
6115
6116         return genlmsg_reply(msg, info);
6117
6118  nla_put_failure:
6119         err = -ENOBUFS;
6120  free_msg:
6121         nlmsg_free(msg);
6122         return err;
6123 }
6124
6125 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6126                                             struct genl_info *info)
6127 {
6128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6129         struct wireless_dev *wdev = info->user_ptr[1];
6130         u64 cookie;
6131
6132         if (!info->attrs[NL80211_ATTR_COOKIE])
6133                 return -EINVAL;
6134
6135         if (!rdev->ops->cancel_remain_on_channel)
6136                 return -EOPNOTSUPP;
6137
6138         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6139
6140         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6141 }
6142
6143 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6144                            u8 *rates, u8 rates_len)
6145 {
6146         u8 i;
6147         u32 mask = 0;
6148
6149         for (i = 0; i < rates_len; i++) {
6150                 int rate = (rates[i] & 0x7f) * 5;
6151                 int ridx;
6152                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6153                         struct ieee80211_rate *srate =
6154                                 &sband->bitrates[ridx];
6155                         if (rate == srate->bitrate) {
6156                                 mask |= 1 << ridx;
6157                                 break;
6158                         }
6159                 }
6160                 if (ridx == sband->n_bitrates)
6161                         return 0; /* rate not found */
6162         }
6163
6164         return mask;
6165 }
6166
6167 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6168                                u8 *rates, u8 rates_len,
6169                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6170 {
6171         u8 i;
6172
6173         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6174
6175         for (i = 0; i < rates_len; i++) {
6176                 int ridx, rbit;
6177
6178                 ridx = rates[i] / 8;
6179                 rbit = BIT(rates[i] % 8);
6180
6181                 /* check validity */
6182                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6183                         return false;
6184
6185                 /* check availability */
6186                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6187                         mcs[ridx] |= rbit;
6188                 else
6189                         return false;
6190         }
6191
6192         return true;
6193 }
6194
6195 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6196         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6197                                     .len = NL80211_MAX_SUPP_RATES },
6198         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6199                                  .len = NL80211_MAX_SUPP_HT_RATES },
6200 };
6201
6202 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6203                                        struct genl_info *info)
6204 {
6205         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6207         struct cfg80211_bitrate_mask mask;
6208         int rem, i;
6209         struct net_device *dev = info->user_ptr[1];
6210         struct nlattr *tx_rates;
6211         struct ieee80211_supported_band *sband;
6212
6213         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6214                 return -EINVAL;
6215
6216         if (!rdev->ops->set_bitrate_mask)
6217                 return -EOPNOTSUPP;
6218
6219         memset(&mask, 0, sizeof(mask));
6220         /* Default to all rates enabled */
6221         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6222                 sband = rdev->wiphy.bands[i];
6223                 mask.control[i].legacy =
6224                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6225                 if (sband)
6226                         memcpy(mask.control[i].mcs,
6227                                sband->ht_cap.mcs.rx_mask,
6228                                sizeof(mask.control[i].mcs));
6229                 else
6230                         memset(mask.control[i].mcs, 0,
6231                                sizeof(mask.control[i].mcs));
6232         }
6233
6234         /*
6235          * The nested attribute uses enum nl80211_band as the index. This maps
6236          * directly to the enum ieee80211_band values used in cfg80211.
6237          */
6238         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6239         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6240         {
6241                 enum ieee80211_band band = nla_type(tx_rates);
6242                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6243                         return -EINVAL;
6244                 sband = rdev->wiphy.bands[band];
6245                 if (sband == NULL)
6246                         return -EINVAL;
6247                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6248                           nla_len(tx_rates), nl80211_txattr_policy);
6249                 if (tb[NL80211_TXRATE_LEGACY]) {
6250                         mask.control[band].legacy = rateset_to_mask(
6251                                 sband,
6252                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6253                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6254                         if ((mask.control[band].legacy == 0) &&
6255                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6256                                 return -EINVAL;
6257                 }
6258                 if (tb[NL80211_TXRATE_MCS]) {
6259                         if (!ht_rateset_to_mask(
6260                                         sband,
6261                                         nla_data(tb[NL80211_TXRATE_MCS]),
6262                                         nla_len(tb[NL80211_TXRATE_MCS]),
6263                                         mask.control[band].mcs))
6264                                 return -EINVAL;
6265                 }
6266
6267                 if (mask.control[band].legacy == 0) {
6268                         /* don't allow empty legacy rates if HT
6269                          * is not even supported. */
6270                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6271                                 return -EINVAL;
6272
6273                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6274                                 if (mask.control[band].mcs[i])
6275                                         break;
6276
6277                         /* legacy and mcs rates may not be both empty */
6278                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6279                                 return -EINVAL;
6280                 }
6281         }
6282
6283         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6284 }
6285
6286 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6287 {
6288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6289         struct wireless_dev *wdev = info->user_ptr[1];
6290         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6291
6292         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6293                 return -EINVAL;
6294
6295         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6296                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6297
6298         switch (wdev->iftype) {
6299         case NL80211_IFTYPE_STATION:
6300         case NL80211_IFTYPE_ADHOC:
6301         case NL80211_IFTYPE_P2P_CLIENT:
6302         case NL80211_IFTYPE_AP:
6303         case NL80211_IFTYPE_AP_VLAN:
6304         case NL80211_IFTYPE_MESH_POINT:
6305         case NL80211_IFTYPE_P2P_GO:
6306         case NL80211_IFTYPE_P2P_DEVICE:
6307                 break;
6308         default:
6309                 return -EOPNOTSUPP;
6310         }
6311
6312         /* not much point in registering if we can't reply */
6313         if (!rdev->ops->mgmt_tx)
6314                 return -EOPNOTSUPP;
6315
6316         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6317                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6318                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6319 }
6320
6321 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6322 {
6323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6324         struct wireless_dev *wdev = info->user_ptr[1];
6325         struct cfg80211_chan_def chandef;
6326         int err;
6327         void *hdr = NULL;
6328         u64 cookie;
6329         struct sk_buff *msg = NULL;
6330         unsigned int wait = 0;
6331         bool offchan, no_cck, dont_wait_for_ack;
6332
6333         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6334
6335         if (!info->attrs[NL80211_ATTR_FRAME])
6336                 return -EINVAL;
6337
6338         if (!rdev->ops->mgmt_tx)
6339                 return -EOPNOTSUPP;
6340
6341         switch (wdev->iftype) {
6342         case NL80211_IFTYPE_STATION:
6343         case NL80211_IFTYPE_ADHOC:
6344         case NL80211_IFTYPE_P2P_CLIENT:
6345         case NL80211_IFTYPE_AP:
6346         case NL80211_IFTYPE_AP_VLAN:
6347         case NL80211_IFTYPE_MESH_POINT:
6348         case NL80211_IFTYPE_P2P_GO:
6349         case NL80211_IFTYPE_P2P_DEVICE:
6350                 break;
6351         default:
6352                 return -EOPNOTSUPP;
6353         }
6354
6355         if (info->attrs[NL80211_ATTR_DURATION]) {
6356                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6357                         return -EINVAL;
6358                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6359
6360                 /*
6361                  * We should wait on the channel for at least a minimum amount
6362                  * of time (10ms) but no longer than the driver supports.
6363                  */
6364                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6365                     wait > rdev->wiphy.max_remain_on_channel_duration)
6366                         return -EINVAL;
6367
6368         }
6369
6370         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6371
6372         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6373                 return -EINVAL;
6374
6375         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6376
6377         err = nl80211_parse_chandef(rdev, info, &chandef);
6378         if (err)
6379                 return err;
6380
6381         if (!dont_wait_for_ack) {
6382                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6383                 if (!msg)
6384                         return -ENOMEM;
6385
6386                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6387                                      NL80211_CMD_FRAME);
6388
6389                 if (IS_ERR(hdr)) {
6390                         err = PTR_ERR(hdr);
6391                         goto free_msg;
6392                 }
6393         }
6394
6395         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6396                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6397                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6398                                     no_cck, dont_wait_for_ack, &cookie);
6399         if (err)
6400                 goto free_msg;
6401
6402         if (msg) {
6403                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6404                         goto nla_put_failure;
6405
6406                 genlmsg_end(msg, hdr);
6407                 return genlmsg_reply(msg, info);
6408         }
6409
6410         return 0;
6411
6412  nla_put_failure:
6413         err = -ENOBUFS;
6414  free_msg:
6415         nlmsg_free(msg);
6416         return err;
6417 }
6418
6419 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6420 {
6421         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6422         struct wireless_dev *wdev = info->user_ptr[1];
6423         u64 cookie;
6424
6425         if (!info->attrs[NL80211_ATTR_COOKIE])
6426                 return -EINVAL;
6427
6428         if (!rdev->ops->mgmt_tx_cancel_wait)
6429                 return -EOPNOTSUPP;
6430
6431         switch (wdev->iftype) {
6432         case NL80211_IFTYPE_STATION:
6433         case NL80211_IFTYPE_ADHOC:
6434         case NL80211_IFTYPE_P2P_CLIENT:
6435         case NL80211_IFTYPE_AP:
6436         case NL80211_IFTYPE_AP_VLAN:
6437         case NL80211_IFTYPE_P2P_GO:
6438         case NL80211_IFTYPE_P2P_DEVICE:
6439                 break;
6440         default:
6441                 return -EOPNOTSUPP;
6442         }
6443
6444         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6445
6446         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6447 }
6448
6449 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6450 {
6451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6452         struct wireless_dev *wdev;
6453         struct net_device *dev = info->user_ptr[1];
6454         u8 ps_state;
6455         bool state;
6456         int err;
6457
6458         if (!info->attrs[NL80211_ATTR_PS_STATE])
6459                 return -EINVAL;
6460
6461         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6462
6463         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6464                 return -EINVAL;
6465
6466         wdev = dev->ieee80211_ptr;
6467
6468         if (!rdev->ops->set_power_mgmt)
6469                 return -EOPNOTSUPP;
6470
6471         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6472
6473         if (state == wdev->ps)
6474                 return 0;
6475
6476         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6477         if (!err)
6478                 wdev->ps = state;
6479         return err;
6480 }
6481
6482 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6483 {
6484         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6485         enum nl80211_ps_state ps_state;
6486         struct wireless_dev *wdev;
6487         struct net_device *dev = info->user_ptr[1];
6488         struct sk_buff *msg;
6489         void *hdr;
6490         int err;
6491
6492         wdev = dev->ieee80211_ptr;
6493
6494         if (!rdev->ops->set_power_mgmt)
6495                 return -EOPNOTSUPP;
6496
6497         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6498         if (!msg)
6499                 return -ENOMEM;
6500
6501         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6502                              NL80211_CMD_GET_POWER_SAVE);
6503         if (!hdr) {
6504                 err = -ENOBUFS;
6505                 goto free_msg;
6506         }
6507
6508         if (wdev->ps)
6509                 ps_state = NL80211_PS_ENABLED;
6510         else
6511                 ps_state = NL80211_PS_DISABLED;
6512
6513         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6514                 goto nla_put_failure;
6515
6516         genlmsg_end(msg, hdr);
6517         return genlmsg_reply(msg, info);
6518
6519  nla_put_failure:
6520         err = -ENOBUFS;
6521  free_msg:
6522         nlmsg_free(msg);
6523         return err;
6524 }
6525
6526 static struct nla_policy
6527 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6528         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6529         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6530         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6531         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6532         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6533         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6534 };
6535
6536 static int nl80211_set_cqm_txe(struct genl_info *info,
6537                                u32 rate, u32 pkts, u32 intvl)
6538 {
6539         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6540         struct wireless_dev *wdev;
6541         struct net_device *dev = info->user_ptr[1];
6542
6543         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6544                 return -EINVAL;
6545
6546         wdev = dev->ieee80211_ptr;
6547
6548         if (!rdev->ops->set_cqm_txe_config)
6549                 return -EOPNOTSUPP;
6550
6551         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6552             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6553                 return -EOPNOTSUPP;
6554
6555         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6556 }
6557
6558 static int nl80211_set_cqm_rssi(struct genl_info *info,
6559                                 s32 threshold, u32 hysteresis)
6560 {
6561         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6562         struct wireless_dev *wdev;
6563         struct net_device *dev = info->user_ptr[1];
6564
6565         if (threshold > 0)
6566                 return -EINVAL;
6567
6568         wdev = dev->ieee80211_ptr;
6569
6570         if (!rdev->ops->set_cqm_rssi_config)
6571                 return -EOPNOTSUPP;
6572
6573         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6574             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6575                 return -EOPNOTSUPP;
6576
6577         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6578 }
6579
6580 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6581 {
6582         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6583         struct nlattr *cqm;
6584         int err;
6585
6586         cqm = info->attrs[NL80211_ATTR_CQM];
6587         if (!cqm) {
6588                 err = -EINVAL;
6589                 goto out;
6590         }
6591
6592         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6593                                nl80211_attr_cqm_policy);
6594         if (err)
6595                 goto out;
6596
6597         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6598             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6599                 s32 threshold;
6600                 u32 hysteresis;
6601                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6602                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6603                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6604         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6605                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6606                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6607                 u32 rate, pkts, intvl;
6608                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6609                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6610                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6611                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6612         } else
6613                 err = -EINVAL;
6614
6615 out:
6616         return err;
6617 }
6618
6619 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6620 {
6621         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6622         struct net_device *dev = info->user_ptr[1];
6623         struct mesh_config cfg;
6624         struct mesh_setup setup;
6625         int err;
6626
6627         /* start with default */
6628         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6629         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6630
6631         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6632                 /* and parse parameters if given */
6633                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6634                 if (err)
6635                         return err;
6636         }
6637
6638         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6639             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6640                 return -EINVAL;
6641
6642         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6643         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6644
6645         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6646             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6647                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6648                         return -EINVAL;
6649
6650         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6651                 /* parse additional setup parameters if given */
6652                 err = nl80211_parse_mesh_setup(info, &setup);
6653                 if (err)
6654                         return err;
6655         }
6656
6657         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6658                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6659                 if (err)
6660                         return err;
6661         } else {
6662                 /* cfg80211_join_mesh() will sort it out */
6663                 setup.chandef.chan = NULL;
6664         }
6665
6666         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6667 }
6668
6669 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6670 {
6671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6672         struct net_device *dev = info->user_ptr[1];
6673
6674         return cfg80211_leave_mesh(rdev, dev);
6675 }
6676
6677 #ifdef CONFIG_PM
6678 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6679 {
6680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6681         struct sk_buff *msg;
6682         void *hdr;
6683
6684         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6685                 return -EOPNOTSUPP;
6686
6687         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6688         if (!msg)
6689                 return -ENOMEM;
6690
6691         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6692                              NL80211_CMD_GET_WOWLAN);
6693         if (!hdr)
6694                 goto nla_put_failure;
6695
6696         if (rdev->wowlan) {
6697                 struct nlattr *nl_wowlan;
6698
6699                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6700                 if (!nl_wowlan)
6701                         goto nla_put_failure;
6702
6703                 if ((rdev->wowlan->any &&
6704                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6705                     (rdev->wowlan->disconnect &&
6706                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6707                     (rdev->wowlan->magic_pkt &&
6708                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6709                     (rdev->wowlan->gtk_rekey_failure &&
6710                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6711                     (rdev->wowlan->eap_identity_req &&
6712                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6713                     (rdev->wowlan->four_way_handshake &&
6714                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6715                     (rdev->wowlan->rfkill_release &&
6716                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6717                         goto nla_put_failure;
6718                 if (rdev->wowlan->n_patterns) {
6719                         struct nlattr *nl_pats, *nl_pat;
6720                         int i, pat_len;
6721
6722                         nl_pats = nla_nest_start(msg,
6723                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6724                         if (!nl_pats)
6725                                 goto nla_put_failure;
6726
6727                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6728                                 nl_pat = nla_nest_start(msg, i + 1);
6729                                 if (!nl_pat)
6730                                         goto nla_put_failure;
6731                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6732                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6733                                             DIV_ROUND_UP(pat_len, 8),
6734                                             rdev->wowlan->patterns[i].mask) ||
6735                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6736                                             pat_len,
6737                                             rdev->wowlan->patterns[i].pattern))
6738                                         goto nla_put_failure;
6739                                 nla_nest_end(msg, nl_pat);
6740                         }
6741                         nla_nest_end(msg, nl_pats);
6742                 }
6743
6744                 nla_nest_end(msg, nl_wowlan);
6745         }
6746
6747         genlmsg_end(msg, hdr);
6748         return genlmsg_reply(msg, info);
6749
6750 nla_put_failure:
6751         nlmsg_free(msg);
6752         return -ENOBUFS;
6753 }
6754
6755 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6756 {
6757         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6758         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6759         struct cfg80211_wowlan new_triggers = {};
6760         struct cfg80211_wowlan *ntrig;
6761         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6762         int err, i;
6763         bool prev_enabled = rdev->wowlan;
6764
6765         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6766                 return -EOPNOTSUPP;
6767
6768         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6769                 cfg80211_rdev_free_wowlan(rdev);
6770                 rdev->wowlan = NULL;
6771                 goto set_wakeup;
6772         }
6773
6774         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6775                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6776                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6777                         nl80211_wowlan_policy);
6778         if (err)
6779                 return err;
6780
6781         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6782                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6783                         return -EINVAL;
6784                 new_triggers.any = true;
6785         }
6786
6787         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6788                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6789                         return -EINVAL;
6790                 new_triggers.disconnect = true;
6791         }
6792
6793         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6794                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6795                         return -EINVAL;
6796                 new_triggers.magic_pkt = true;
6797         }
6798
6799         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6800                 return -EINVAL;
6801
6802         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6803                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6804                         return -EINVAL;
6805                 new_triggers.gtk_rekey_failure = true;
6806         }
6807
6808         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6809                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6810                         return -EINVAL;
6811                 new_triggers.eap_identity_req = true;
6812         }
6813
6814         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6815                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6816                         return -EINVAL;
6817                 new_triggers.four_way_handshake = true;
6818         }
6819
6820         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6821                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6822                         return -EINVAL;
6823                 new_triggers.rfkill_release = true;
6824         }
6825
6826         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6827                 struct nlattr *pat;
6828                 int n_patterns = 0;
6829                 int rem, pat_len, mask_len;
6830                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6831
6832                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6833                                     rem)
6834                         n_patterns++;
6835                 if (n_patterns > wowlan->n_patterns)
6836                         return -EINVAL;
6837
6838                 new_triggers.patterns = kcalloc(n_patterns,
6839                                                 sizeof(new_triggers.patterns[0]),
6840                                                 GFP_KERNEL);
6841                 if (!new_triggers.patterns)
6842                         return -ENOMEM;
6843
6844                 new_triggers.n_patterns = n_patterns;
6845                 i = 0;
6846
6847                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6848                                     rem) {
6849                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6850                                   nla_data(pat), nla_len(pat), NULL);
6851                         err = -EINVAL;
6852                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6853                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6854                                 goto error;
6855                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6856                         mask_len = DIV_ROUND_UP(pat_len, 8);
6857                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6858                             mask_len)
6859                                 goto error;
6860                         if (pat_len > wowlan->pattern_max_len ||
6861                             pat_len < wowlan->pattern_min_len)
6862                                 goto error;
6863
6864                         new_triggers.patterns[i].mask =
6865                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6866                         if (!new_triggers.patterns[i].mask) {
6867                                 err = -ENOMEM;
6868                                 goto error;
6869                         }
6870                         new_triggers.patterns[i].pattern =
6871                                 new_triggers.patterns[i].mask + mask_len;
6872                         memcpy(new_triggers.patterns[i].mask,
6873                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6874                                mask_len);
6875                         new_triggers.patterns[i].pattern_len = pat_len;
6876                         memcpy(new_triggers.patterns[i].pattern,
6877                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6878                                pat_len);
6879                         i++;
6880                 }
6881         }
6882
6883         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6884         if (!ntrig) {
6885                 err = -ENOMEM;
6886                 goto error;
6887         }
6888         cfg80211_rdev_free_wowlan(rdev);
6889         rdev->wowlan = ntrig;
6890
6891  set_wakeup:
6892         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6893                 rdev_set_wakeup(rdev, rdev->wowlan);
6894
6895         return 0;
6896  error:
6897         for (i = 0; i < new_triggers.n_patterns; i++)
6898                 kfree(new_triggers.patterns[i].mask);
6899         kfree(new_triggers.patterns);
6900         return err;
6901 }
6902 #endif
6903
6904 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6905 {
6906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6907         struct net_device *dev = info->user_ptr[1];
6908         struct wireless_dev *wdev = dev->ieee80211_ptr;
6909         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6910         struct cfg80211_gtk_rekey_data rekey_data;
6911         int err;
6912
6913         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6914                 return -EINVAL;
6915
6916         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6917                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6918                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6919                         nl80211_rekey_policy);
6920         if (err)
6921                 return err;
6922
6923         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6924                 return -ERANGE;
6925         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6926                 return -ERANGE;
6927         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6928                 return -ERANGE;
6929
6930         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6931                NL80211_KEK_LEN);
6932         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6933                NL80211_KCK_LEN);
6934         memcpy(rekey_data.replay_ctr,
6935                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6936                NL80211_REPLAY_CTR_LEN);
6937
6938         wdev_lock(wdev);
6939         if (!wdev->current_bss) {
6940                 err = -ENOTCONN;
6941                 goto out;
6942         }
6943
6944         if (!rdev->ops->set_rekey_data) {
6945                 err = -EOPNOTSUPP;
6946                 goto out;
6947         }
6948
6949         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6950  out:
6951         wdev_unlock(wdev);
6952         return err;
6953 }
6954
6955 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6956                                              struct genl_info *info)
6957 {
6958         struct net_device *dev = info->user_ptr[1];
6959         struct wireless_dev *wdev = dev->ieee80211_ptr;
6960
6961         if (wdev->iftype != NL80211_IFTYPE_AP &&
6962             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6963                 return -EINVAL;
6964
6965         if (wdev->ap_unexpected_nlportid)
6966                 return -EBUSY;
6967
6968         wdev->ap_unexpected_nlportid = info->snd_portid;
6969         return 0;
6970 }
6971
6972 static int nl80211_probe_client(struct sk_buff *skb,
6973                                 struct genl_info *info)
6974 {
6975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6976         struct net_device *dev = info->user_ptr[1];
6977         struct wireless_dev *wdev = dev->ieee80211_ptr;
6978         struct sk_buff *msg;
6979         void *hdr;
6980         const u8 *addr;
6981         u64 cookie;
6982         int err;
6983
6984         if (wdev->iftype != NL80211_IFTYPE_AP &&
6985             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6986                 return -EOPNOTSUPP;
6987
6988         if (!info->attrs[NL80211_ATTR_MAC])
6989                 return -EINVAL;
6990
6991         if (!rdev->ops->probe_client)
6992                 return -EOPNOTSUPP;
6993
6994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6995         if (!msg)
6996                 return -ENOMEM;
6997
6998         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6999                              NL80211_CMD_PROBE_CLIENT);
7000
7001         if (IS_ERR(hdr)) {
7002                 err = PTR_ERR(hdr);
7003                 goto free_msg;
7004         }
7005
7006         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7007
7008         err = rdev_probe_client(rdev, dev, addr, &cookie);
7009         if (err)
7010                 goto free_msg;
7011
7012         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7013                 goto nla_put_failure;
7014
7015         genlmsg_end(msg, hdr);
7016
7017         return genlmsg_reply(msg, info);
7018
7019  nla_put_failure:
7020         err = -ENOBUFS;
7021  free_msg:
7022         nlmsg_free(msg);
7023         return err;
7024 }
7025
7026 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7027 {
7028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7029         struct cfg80211_beacon_registration *reg, *nreg;
7030         int rv;
7031
7032         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7033                 return -EOPNOTSUPP;
7034
7035         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7036         if (!nreg)
7037                 return -ENOMEM;
7038
7039         /* First, check if already registered. */
7040         spin_lock_bh(&rdev->beacon_registrations_lock);
7041         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7042                 if (reg->nlportid == info->snd_portid) {
7043                         rv = -EALREADY;
7044                         goto out_err;
7045                 }
7046         }
7047         /* Add it to the list */
7048         nreg->nlportid = info->snd_portid;
7049         list_add(&nreg->list, &rdev->beacon_registrations);
7050
7051         spin_unlock_bh(&rdev->beacon_registrations_lock);
7052
7053         return 0;
7054 out_err:
7055         spin_unlock_bh(&rdev->beacon_registrations_lock);
7056         kfree(nreg);
7057         return rv;
7058 }
7059
7060 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7061 {
7062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7063         struct wireless_dev *wdev = info->user_ptr[1];
7064         int err;
7065
7066         if (!rdev->ops->start_p2p_device)
7067                 return -EOPNOTSUPP;
7068
7069         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7070                 return -EOPNOTSUPP;
7071
7072         if (wdev->p2p_started)
7073                 return 0;
7074
7075         mutex_lock(&rdev->devlist_mtx);
7076         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7077         mutex_unlock(&rdev->devlist_mtx);
7078         if (err)
7079                 return err;
7080
7081         err = rdev_start_p2p_device(rdev, wdev);
7082         if (err)
7083                 return err;
7084
7085         wdev->p2p_started = true;
7086         mutex_lock(&rdev->devlist_mtx);
7087         rdev->opencount++;
7088         mutex_unlock(&rdev->devlist_mtx);
7089
7090         return 0;
7091 }
7092
7093 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7094 {
7095         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7096         struct wireless_dev *wdev = info->user_ptr[1];
7097
7098         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7099                 return -EOPNOTSUPP;
7100
7101         if (!rdev->ops->stop_p2p_device)
7102                 return -EOPNOTSUPP;
7103
7104         if (!wdev->p2p_started)
7105                 return 0;
7106
7107         rdev_stop_p2p_device(rdev, wdev);
7108         wdev->p2p_started = false;
7109
7110         mutex_lock(&rdev->devlist_mtx);
7111         rdev->opencount--;
7112         mutex_unlock(&rdev->devlist_mtx);
7113
7114         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7115                 rdev->scan_req->aborted = true;
7116                 ___cfg80211_scan_done(rdev, true);
7117         }
7118
7119         return 0;
7120 }
7121
7122 #define NL80211_FLAG_NEED_WIPHY         0x01
7123 #define NL80211_FLAG_NEED_NETDEV        0x02
7124 #define NL80211_FLAG_NEED_RTNL          0x04
7125 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7126 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7127                                          NL80211_FLAG_CHECK_NETDEV_UP)
7128 #define NL80211_FLAG_NEED_WDEV          0x10
7129 /* If a netdev is associated, it must be UP, P2P must be started */
7130 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7131                                          NL80211_FLAG_CHECK_NETDEV_UP)
7132
7133 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7134                             struct genl_info *info)
7135 {
7136         struct cfg80211_registered_device *rdev;
7137         struct wireless_dev *wdev;
7138         struct net_device *dev;
7139         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7140
7141         if (rtnl)
7142                 rtnl_lock();
7143
7144         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7145                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7146                 if (IS_ERR(rdev)) {
7147                         if (rtnl)
7148                                 rtnl_unlock();
7149                         return PTR_ERR(rdev);
7150                 }
7151                 info->user_ptr[0] = rdev;
7152         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7153                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7154                 mutex_lock(&cfg80211_mutex);
7155                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7156                                                   info->attrs);
7157                 if (IS_ERR(wdev)) {
7158                         mutex_unlock(&cfg80211_mutex);
7159                         if (rtnl)
7160                                 rtnl_unlock();
7161                         return PTR_ERR(wdev);
7162                 }
7163
7164                 dev = wdev->netdev;
7165                 rdev = wiphy_to_dev(wdev->wiphy);
7166
7167                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7168                         if (!dev) {
7169                                 mutex_unlock(&cfg80211_mutex);
7170                                 if (rtnl)
7171                                         rtnl_unlock();
7172                                 return -EINVAL;
7173                         }
7174
7175                         info->user_ptr[1] = dev;
7176                 } else {
7177                         info->user_ptr[1] = wdev;
7178                 }
7179
7180                 if (dev) {
7181                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7182                             !netif_running(dev)) {
7183                                 mutex_unlock(&cfg80211_mutex);
7184                                 if (rtnl)
7185                                         rtnl_unlock();
7186                                 return -ENETDOWN;
7187                         }
7188
7189                         dev_hold(dev);
7190                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7191                         if (!wdev->p2p_started) {
7192                                 mutex_unlock(&cfg80211_mutex);
7193                                 if (rtnl)
7194                                         rtnl_unlock();
7195                                 return -ENETDOWN;
7196                         }
7197                 }
7198
7199                 cfg80211_lock_rdev(rdev);
7200
7201                 mutex_unlock(&cfg80211_mutex);
7202
7203                 info->user_ptr[0] = rdev;
7204         }
7205
7206         return 0;
7207 }
7208
7209 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7210                               struct genl_info *info)
7211 {
7212         if (info->user_ptr[0])
7213                 cfg80211_unlock_rdev(info->user_ptr[0]);
7214         if (info->user_ptr[1]) {
7215                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7216                         struct wireless_dev *wdev = info->user_ptr[1];
7217
7218                         if (wdev->netdev)
7219                                 dev_put(wdev->netdev);
7220                 } else {
7221                         dev_put(info->user_ptr[1]);
7222                 }
7223         }
7224         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7225                 rtnl_unlock();
7226 }
7227
7228 static struct genl_ops nl80211_ops[] = {
7229         {
7230                 .cmd = NL80211_CMD_GET_WIPHY,
7231                 .doit = nl80211_get_wiphy,
7232                 .dumpit = nl80211_dump_wiphy,
7233                 .policy = nl80211_policy,
7234                 /* can be retrieved by unprivileged users */
7235                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7236         },
7237         {
7238                 .cmd = NL80211_CMD_SET_WIPHY,
7239                 .doit = nl80211_set_wiphy,
7240                 .policy = nl80211_policy,
7241                 .flags = GENL_ADMIN_PERM,
7242                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7243         },
7244         {
7245                 .cmd = NL80211_CMD_GET_INTERFACE,
7246                 .doit = nl80211_get_interface,
7247                 .dumpit = nl80211_dump_interface,
7248                 .policy = nl80211_policy,
7249                 /* can be retrieved by unprivileged users */
7250                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7251         },
7252         {
7253                 .cmd = NL80211_CMD_SET_INTERFACE,
7254                 .doit = nl80211_set_interface,
7255                 .policy = nl80211_policy,
7256                 .flags = GENL_ADMIN_PERM,
7257                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7258                                   NL80211_FLAG_NEED_RTNL,
7259         },
7260         {
7261                 .cmd = NL80211_CMD_NEW_INTERFACE,
7262                 .doit = nl80211_new_interface,
7263                 .policy = nl80211_policy,
7264                 .flags = GENL_ADMIN_PERM,
7265                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7266                                   NL80211_FLAG_NEED_RTNL,
7267         },
7268         {
7269                 .cmd = NL80211_CMD_DEL_INTERFACE,
7270                 .doit = nl80211_del_interface,
7271                 .policy = nl80211_policy,
7272                 .flags = GENL_ADMIN_PERM,
7273                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7274                                   NL80211_FLAG_NEED_RTNL,
7275         },
7276         {
7277                 .cmd = NL80211_CMD_GET_KEY,
7278                 .doit = nl80211_get_key,
7279                 .policy = nl80211_policy,
7280                 .flags = GENL_ADMIN_PERM,
7281                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7282                                   NL80211_FLAG_NEED_RTNL,
7283         },
7284         {
7285                 .cmd = NL80211_CMD_SET_KEY,
7286                 .doit = nl80211_set_key,
7287                 .policy = nl80211_policy,
7288                 .flags = GENL_ADMIN_PERM,
7289                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7290                                   NL80211_FLAG_NEED_RTNL,
7291         },
7292         {
7293                 .cmd = NL80211_CMD_NEW_KEY,
7294                 .doit = nl80211_new_key,
7295                 .policy = nl80211_policy,
7296                 .flags = GENL_ADMIN_PERM,
7297                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7298                                   NL80211_FLAG_NEED_RTNL,
7299         },
7300         {
7301                 .cmd = NL80211_CMD_DEL_KEY,
7302                 .doit = nl80211_del_key,
7303                 .policy = nl80211_policy,
7304                 .flags = GENL_ADMIN_PERM,
7305                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7306                                   NL80211_FLAG_NEED_RTNL,
7307         },
7308         {
7309                 .cmd = NL80211_CMD_SET_BEACON,
7310                 .policy = nl80211_policy,
7311                 .flags = GENL_ADMIN_PERM,
7312                 .doit = nl80211_set_beacon,
7313                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7314                                   NL80211_FLAG_NEED_RTNL,
7315         },
7316         {
7317                 .cmd = NL80211_CMD_START_AP,
7318                 .policy = nl80211_policy,
7319                 .flags = GENL_ADMIN_PERM,
7320                 .doit = nl80211_start_ap,
7321                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7322                                   NL80211_FLAG_NEED_RTNL,
7323         },
7324         {
7325                 .cmd = NL80211_CMD_STOP_AP,
7326                 .policy = nl80211_policy,
7327                 .flags = GENL_ADMIN_PERM,
7328                 .doit = nl80211_stop_ap,
7329                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7330                                   NL80211_FLAG_NEED_RTNL,
7331         },
7332         {
7333                 .cmd = NL80211_CMD_GET_STATION,
7334                 .doit = nl80211_get_station,
7335                 .dumpit = nl80211_dump_station,
7336                 .policy = nl80211_policy,
7337                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7338                                   NL80211_FLAG_NEED_RTNL,
7339         },
7340         {
7341                 .cmd = NL80211_CMD_SET_STATION,
7342                 .doit = nl80211_set_station,
7343                 .policy = nl80211_policy,
7344                 .flags = GENL_ADMIN_PERM,
7345                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7346                                   NL80211_FLAG_NEED_RTNL,
7347         },
7348         {
7349                 .cmd = NL80211_CMD_NEW_STATION,
7350                 .doit = nl80211_new_station,
7351                 .policy = nl80211_policy,
7352                 .flags = GENL_ADMIN_PERM,
7353                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7354                                   NL80211_FLAG_NEED_RTNL,
7355         },
7356         {
7357                 .cmd = NL80211_CMD_DEL_STATION,
7358                 .doit = nl80211_del_station,
7359                 .policy = nl80211_policy,
7360                 .flags = GENL_ADMIN_PERM,
7361                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7362                                   NL80211_FLAG_NEED_RTNL,
7363         },
7364         {
7365                 .cmd = NL80211_CMD_GET_MPATH,
7366                 .doit = nl80211_get_mpath,
7367                 .dumpit = nl80211_dump_mpath,
7368                 .policy = nl80211_policy,
7369                 .flags = GENL_ADMIN_PERM,
7370                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7371                                   NL80211_FLAG_NEED_RTNL,
7372         },
7373         {
7374                 .cmd = NL80211_CMD_SET_MPATH,
7375                 .doit = nl80211_set_mpath,
7376                 .policy = nl80211_policy,
7377                 .flags = GENL_ADMIN_PERM,
7378                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7379                                   NL80211_FLAG_NEED_RTNL,
7380         },
7381         {
7382                 .cmd = NL80211_CMD_NEW_MPATH,
7383                 .doit = nl80211_new_mpath,
7384                 .policy = nl80211_policy,
7385                 .flags = GENL_ADMIN_PERM,
7386                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7387                                   NL80211_FLAG_NEED_RTNL,
7388         },
7389         {
7390                 .cmd = NL80211_CMD_DEL_MPATH,
7391                 .doit = nl80211_del_mpath,
7392                 .policy = nl80211_policy,
7393                 .flags = GENL_ADMIN_PERM,
7394                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7395                                   NL80211_FLAG_NEED_RTNL,
7396         },
7397         {
7398                 .cmd = NL80211_CMD_SET_BSS,
7399                 .doit = nl80211_set_bss,
7400                 .policy = nl80211_policy,
7401                 .flags = GENL_ADMIN_PERM,
7402                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7403                                   NL80211_FLAG_NEED_RTNL,
7404         },
7405         {
7406                 .cmd = NL80211_CMD_GET_REG,
7407                 .doit = nl80211_get_reg,
7408                 .policy = nl80211_policy,
7409                 /* can be retrieved by unprivileged users */
7410         },
7411         {
7412                 .cmd = NL80211_CMD_SET_REG,
7413                 .doit = nl80211_set_reg,
7414                 .policy = nl80211_policy,
7415                 .flags = GENL_ADMIN_PERM,
7416         },
7417         {
7418                 .cmd = NL80211_CMD_REQ_SET_REG,
7419                 .doit = nl80211_req_set_reg,
7420                 .policy = nl80211_policy,
7421                 .flags = GENL_ADMIN_PERM,
7422         },
7423         {
7424                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7425                 .doit = nl80211_get_mesh_config,
7426                 .policy = nl80211_policy,
7427                 /* can be retrieved by unprivileged users */
7428                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7429                                   NL80211_FLAG_NEED_RTNL,
7430         },
7431         {
7432                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7433                 .doit = nl80211_update_mesh_config,
7434                 .policy = nl80211_policy,
7435                 .flags = GENL_ADMIN_PERM,
7436                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7437                                   NL80211_FLAG_NEED_RTNL,
7438         },
7439         {
7440                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7441                 .doit = nl80211_trigger_scan,
7442                 .policy = nl80211_policy,
7443                 .flags = GENL_ADMIN_PERM,
7444                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7445                                   NL80211_FLAG_NEED_RTNL,
7446         },
7447         {
7448                 .cmd = NL80211_CMD_GET_SCAN,
7449                 .policy = nl80211_policy,
7450                 .dumpit = nl80211_dump_scan,
7451         },
7452         {
7453                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7454                 .doit = nl80211_start_sched_scan,
7455                 .policy = nl80211_policy,
7456                 .flags = GENL_ADMIN_PERM,
7457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7458                                   NL80211_FLAG_NEED_RTNL,
7459         },
7460         {
7461                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7462                 .doit = nl80211_stop_sched_scan,
7463                 .policy = nl80211_policy,
7464                 .flags = GENL_ADMIN_PERM,
7465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7466                                   NL80211_FLAG_NEED_RTNL,
7467         },
7468         {
7469                 .cmd = NL80211_CMD_AUTHENTICATE,
7470                 .doit = nl80211_authenticate,
7471                 .policy = nl80211_policy,
7472                 .flags = GENL_ADMIN_PERM,
7473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7474                                   NL80211_FLAG_NEED_RTNL,
7475         },
7476         {
7477                 .cmd = NL80211_CMD_ASSOCIATE,
7478                 .doit = nl80211_associate,
7479                 .policy = nl80211_policy,
7480                 .flags = GENL_ADMIN_PERM,
7481                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7482                                   NL80211_FLAG_NEED_RTNL,
7483         },
7484         {
7485                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7486                 .doit = nl80211_deauthenticate,
7487                 .policy = nl80211_policy,
7488                 .flags = GENL_ADMIN_PERM,
7489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7490                                   NL80211_FLAG_NEED_RTNL,
7491         },
7492         {
7493                 .cmd = NL80211_CMD_DISASSOCIATE,
7494                 .doit = nl80211_disassociate,
7495                 .policy = nl80211_policy,
7496                 .flags = GENL_ADMIN_PERM,
7497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7498                                   NL80211_FLAG_NEED_RTNL,
7499         },
7500         {
7501                 .cmd = NL80211_CMD_JOIN_IBSS,
7502                 .doit = nl80211_join_ibss,
7503                 .policy = nl80211_policy,
7504                 .flags = GENL_ADMIN_PERM,
7505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7506                                   NL80211_FLAG_NEED_RTNL,
7507         },
7508         {
7509                 .cmd = NL80211_CMD_LEAVE_IBSS,
7510                 .doit = nl80211_leave_ibss,
7511                 .policy = nl80211_policy,
7512                 .flags = GENL_ADMIN_PERM,
7513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7514                                   NL80211_FLAG_NEED_RTNL,
7515         },
7516 #ifdef CONFIG_NL80211_TESTMODE
7517         {
7518                 .cmd = NL80211_CMD_TESTMODE,
7519                 .doit = nl80211_testmode_do,
7520                 .dumpit = nl80211_testmode_dump,
7521                 .policy = nl80211_policy,
7522                 .flags = GENL_ADMIN_PERM,
7523                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7524                                   NL80211_FLAG_NEED_RTNL,
7525         },
7526 #endif
7527         {
7528                 .cmd = NL80211_CMD_CONNECT,
7529                 .doit = nl80211_connect,
7530                 .policy = nl80211_policy,
7531                 .flags = GENL_ADMIN_PERM,
7532                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7533                                   NL80211_FLAG_NEED_RTNL,
7534         },
7535         {
7536                 .cmd = NL80211_CMD_DISCONNECT,
7537                 .doit = nl80211_disconnect,
7538                 .policy = nl80211_policy,
7539                 .flags = GENL_ADMIN_PERM,
7540                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7541                                   NL80211_FLAG_NEED_RTNL,
7542         },
7543         {
7544                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7545                 .doit = nl80211_wiphy_netns,
7546                 .policy = nl80211_policy,
7547                 .flags = GENL_ADMIN_PERM,
7548                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7549                                   NL80211_FLAG_NEED_RTNL,
7550         },
7551         {
7552                 .cmd = NL80211_CMD_GET_SURVEY,
7553                 .policy = nl80211_policy,
7554                 .dumpit = nl80211_dump_survey,
7555         },
7556         {
7557                 .cmd = NL80211_CMD_SET_PMKSA,
7558                 .doit = nl80211_setdel_pmksa,
7559                 .policy = nl80211_policy,
7560                 .flags = GENL_ADMIN_PERM,
7561                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7562                                   NL80211_FLAG_NEED_RTNL,
7563         },
7564         {
7565                 .cmd = NL80211_CMD_DEL_PMKSA,
7566                 .doit = nl80211_setdel_pmksa,
7567                 .policy = nl80211_policy,
7568                 .flags = GENL_ADMIN_PERM,
7569                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7570                                   NL80211_FLAG_NEED_RTNL,
7571         },
7572         {
7573                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7574                 .doit = nl80211_flush_pmksa,
7575                 .policy = nl80211_policy,
7576                 .flags = GENL_ADMIN_PERM,
7577                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7578                                   NL80211_FLAG_NEED_RTNL,
7579         },
7580         {
7581                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7582                 .doit = nl80211_remain_on_channel,
7583                 .policy = nl80211_policy,
7584                 .flags = GENL_ADMIN_PERM,
7585                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7586                                   NL80211_FLAG_NEED_RTNL,
7587         },
7588         {
7589                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7590                 .doit = nl80211_cancel_remain_on_channel,
7591                 .policy = nl80211_policy,
7592                 .flags = GENL_ADMIN_PERM,
7593                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7594                                   NL80211_FLAG_NEED_RTNL,
7595         },
7596         {
7597                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7598                 .doit = nl80211_set_tx_bitrate_mask,
7599                 .policy = nl80211_policy,
7600                 .flags = GENL_ADMIN_PERM,
7601                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7602                                   NL80211_FLAG_NEED_RTNL,
7603         },
7604         {
7605                 .cmd = NL80211_CMD_REGISTER_FRAME,
7606                 .doit = nl80211_register_mgmt,
7607                 .policy = nl80211_policy,
7608                 .flags = GENL_ADMIN_PERM,
7609                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7610                                   NL80211_FLAG_NEED_RTNL,
7611         },
7612         {
7613                 .cmd = NL80211_CMD_FRAME,
7614                 .doit = nl80211_tx_mgmt,
7615                 .policy = nl80211_policy,
7616                 .flags = GENL_ADMIN_PERM,
7617                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7618                                   NL80211_FLAG_NEED_RTNL,
7619         },
7620         {
7621                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7622                 .doit = nl80211_tx_mgmt_cancel_wait,
7623                 .policy = nl80211_policy,
7624                 .flags = GENL_ADMIN_PERM,
7625                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7626                                   NL80211_FLAG_NEED_RTNL,
7627         },
7628         {
7629                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7630                 .doit = nl80211_set_power_save,
7631                 .policy = nl80211_policy,
7632                 .flags = GENL_ADMIN_PERM,
7633                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7634                                   NL80211_FLAG_NEED_RTNL,
7635         },
7636         {
7637                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7638                 .doit = nl80211_get_power_save,
7639                 .policy = nl80211_policy,
7640                 /* can be retrieved by unprivileged users */
7641                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7642                                   NL80211_FLAG_NEED_RTNL,
7643         },
7644         {
7645                 .cmd = NL80211_CMD_SET_CQM,
7646                 .doit = nl80211_set_cqm,
7647                 .policy = nl80211_policy,
7648                 .flags = GENL_ADMIN_PERM,
7649                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7650                                   NL80211_FLAG_NEED_RTNL,
7651         },
7652         {
7653                 .cmd = NL80211_CMD_SET_CHANNEL,
7654                 .doit = nl80211_set_channel,
7655                 .policy = nl80211_policy,
7656                 .flags = GENL_ADMIN_PERM,
7657                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7658                                   NL80211_FLAG_NEED_RTNL,
7659         },
7660         {
7661                 .cmd = NL80211_CMD_SET_WDS_PEER,
7662                 .doit = nl80211_set_wds_peer,
7663                 .policy = nl80211_policy,
7664                 .flags = GENL_ADMIN_PERM,
7665                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7666                                   NL80211_FLAG_NEED_RTNL,
7667         },
7668         {
7669                 .cmd = NL80211_CMD_JOIN_MESH,
7670                 .doit = nl80211_join_mesh,
7671                 .policy = nl80211_policy,
7672                 .flags = GENL_ADMIN_PERM,
7673                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7674                                   NL80211_FLAG_NEED_RTNL,
7675         },
7676         {
7677                 .cmd = NL80211_CMD_LEAVE_MESH,
7678                 .doit = nl80211_leave_mesh,
7679                 .policy = nl80211_policy,
7680                 .flags = GENL_ADMIN_PERM,
7681                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7682                                   NL80211_FLAG_NEED_RTNL,
7683         },
7684 #ifdef CONFIG_PM
7685         {
7686                 .cmd = NL80211_CMD_GET_WOWLAN,
7687                 .doit = nl80211_get_wowlan,
7688                 .policy = nl80211_policy,
7689                 /* can be retrieved by unprivileged users */
7690                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7691                                   NL80211_FLAG_NEED_RTNL,
7692         },
7693         {
7694                 .cmd = NL80211_CMD_SET_WOWLAN,
7695                 .doit = nl80211_set_wowlan,
7696                 .policy = nl80211_policy,
7697                 .flags = GENL_ADMIN_PERM,
7698                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7699                                   NL80211_FLAG_NEED_RTNL,
7700         },
7701 #endif
7702         {
7703                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7704                 .doit = nl80211_set_rekey_data,
7705                 .policy = nl80211_policy,
7706                 .flags = GENL_ADMIN_PERM,
7707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7708                                   NL80211_FLAG_NEED_RTNL,
7709         },
7710         {
7711                 .cmd = NL80211_CMD_TDLS_MGMT,
7712                 .doit = nl80211_tdls_mgmt,
7713                 .policy = nl80211_policy,
7714                 .flags = GENL_ADMIN_PERM,
7715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7716                                   NL80211_FLAG_NEED_RTNL,
7717         },
7718         {
7719                 .cmd = NL80211_CMD_TDLS_OPER,
7720                 .doit = nl80211_tdls_oper,
7721                 .policy = nl80211_policy,
7722                 .flags = GENL_ADMIN_PERM,
7723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7724                                   NL80211_FLAG_NEED_RTNL,
7725         },
7726         {
7727                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7728                 .doit = nl80211_register_unexpected_frame,
7729                 .policy = nl80211_policy,
7730                 .flags = GENL_ADMIN_PERM,
7731                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7732                                   NL80211_FLAG_NEED_RTNL,
7733         },
7734         {
7735                 .cmd = NL80211_CMD_PROBE_CLIENT,
7736                 .doit = nl80211_probe_client,
7737                 .policy = nl80211_policy,
7738                 .flags = GENL_ADMIN_PERM,
7739                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7740                                   NL80211_FLAG_NEED_RTNL,
7741         },
7742         {
7743                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7744                 .doit = nl80211_register_beacons,
7745                 .policy = nl80211_policy,
7746                 .flags = GENL_ADMIN_PERM,
7747                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7748                                   NL80211_FLAG_NEED_RTNL,
7749         },
7750         {
7751                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7752                 .doit = nl80211_set_noack_map,
7753                 .policy = nl80211_policy,
7754                 .flags = GENL_ADMIN_PERM,
7755                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7756                                   NL80211_FLAG_NEED_RTNL,
7757         },
7758         {
7759                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7760                 .doit = nl80211_start_p2p_device,
7761                 .policy = nl80211_policy,
7762                 .flags = GENL_ADMIN_PERM,
7763                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7764                                   NL80211_FLAG_NEED_RTNL,
7765         },
7766         {
7767                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7768                 .doit = nl80211_stop_p2p_device,
7769                 .policy = nl80211_policy,
7770                 .flags = GENL_ADMIN_PERM,
7771                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7772                                   NL80211_FLAG_NEED_RTNL,
7773         },
7774         {
7775                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7776                 .doit = nl80211_set_mcast_rate,
7777                 .policy = nl80211_policy,
7778                 .flags = GENL_ADMIN_PERM,
7779                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7780                                   NL80211_FLAG_NEED_RTNL,
7781         },
7782 };
7783
7784 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7785         .name = "mlme",
7786 };
7787
7788 /* multicast groups */
7789 static struct genl_multicast_group nl80211_config_mcgrp = {
7790         .name = "config",
7791 };
7792 static struct genl_multicast_group nl80211_scan_mcgrp = {
7793         .name = "scan",
7794 };
7795 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7796         .name = "regulatory",
7797 };
7798
7799 /* notification functions */
7800
7801 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7802 {
7803         struct sk_buff *msg;
7804
7805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7806         if (!msg)
7807                 return;
7808
7809         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7810                 nlmsg_free(msg);
7811                 return;
7812         }
7813
7814         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7815                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7816 }
7817
7818 static int nl80211_add_scan_req(struct sk_buff *msg,
7819                                 struct cfg80211_registered_device *rdev)
7820 {
7821         struct cfg80211_scan_request *req = rdev->scan_req;
7822         struct nlattr *nest;
7823         int i;
7824
7825         ASSERT_RDEV_LOCK(rdev);
7826
7827         if (WARN_ON(!req))
7828                 return 0;
7829
7830         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7831         if (!nest)
7832                 goto nla_put_failure;
7833         for (i = 0; i < req->n_ssids; i++) {
7834                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7835                         goto nla_put_failure;
7836         }
7837         nla_nest_end(msg, nest);
7838
7839         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7840         if (!nest)
7841                 goto nla_put_failure;
7842         for (i = 0; i < req->n_channels; i++) {
7843                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7844                         goto nla_put_failure;
7845         }
7846         nla_nest_end(msg, nest);
7847
7848         if (req->ie &&
7849             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7850                 goto nla_put_failure;
7851
7852         if (req->flags)
7853                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7854
7855         return 0;
7856  nla_put_failure:
7857         return -ENOBUFS;
7858 }
7859
7860 static int nl80211_send_scan_msg(struct sk_buff *msg,
7861                                  struct cfg80211_registered_device *rdev,
7862                                  struct wireless_dev *wdev,
7863                                  u32 portid, u32 seq, int flags,
7864                                  u32 cmd)
7865 {
7866         void *hdr;
7867
7868         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7869         if (!hdr)
7870                 return -1;
7871
7872         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7873             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7874                                          wdev->netdev->ifindex)) ||
7875             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7876                 goto nla_put_failure;
7877
7878         /* ignore errors and send incomplete event anyway */
7879         nl80211_add_scan_req(msg, rdev);
7880
7881         return genlmsg_end(msg, hdr);
7882
7883  nla_put_failure:
7884         genlmsg_cancel(msg, hdr);
7885         return -EMSGSIZE;
7886 }
7887
7888 static int
7889 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7890                             struct cfg80211_registered_device *rdev,
7891                             struct net_device *netdev,
7892                             u32 portid, u32 seq, int flags, u32 cmd)
7893 {
7894         void *hdr;
7895
7896         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7897         if (!hdr)
7898                 return -1;
7899
7900         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7901             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7902                 goto nla_put_failure;
7903
7904         return genlmsg_end(msg, hdr);
7905
7906  nla_put_failure:
7907         genlmsg_cancel(msg, hdr);
7908         return -EMSGSIZE;
7909 }
7910
7911 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7912                              struct wireless_dev *wdev)
7913 {
7914         struct sk_buff *msg;
7915
7916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7917         if (!msg)
7918                 return;
7919
7920         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7921                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7922                 nlmsg_free(msg);
7923                 return;
7924         }
7925
7926         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7927                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7928 }
7929
7930 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7931                             struct wireless_dev *wdev)
7932 {
7933         struct sk_buff *msg;
7934
7935         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7936         if (!msg)
7937                 return;
7938
7939         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7940                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7941                 nlmsg_free(msg);
7942                 return;
7943         }
7944
7945         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7946                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7947 }
7948
7949 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7950                                struct wireless_dev *wdev)
7951 {
7952         struct sk_buff *msg;
7953
7954         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7955         if (!msg)
7956                 return;
7957
7958         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7959                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7960                 nlmsg_free(msg);
7961                 return;
7962         }
7963
7964         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7965                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7966 }
7967
7968 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7969                                      struct net_device *netdev)
7970 {
7971         struct sk_buff *msg;
7972
7973         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7974         if (!msg)
7975                 return;
7976
7977         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7978                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7979                 nlmsg_free(msg);
7980                 return;
7981         }
7982
7983         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7984                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7985 }
7986
7987 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7988                              struct net_device *netdev, u32 cmd)
7989 {
7990         struct sk_buff *msg;
7991
7992         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7993         if (!msg)
7994                 return;
7995
7996         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7997                 nlmsg_free(msg);
7998                 return;
7999         }
8000
8001         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8002                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8003 }
8004
8005 /*
8006  * This can happen on global regulatory changes or device specific settings
8007  * based on custom world regulatory domains.
8008  */
8009 void nl80211_send_reg_change_event(struct regulatory_request *request)
8010 {
8011         struct sk_buff *msg;
8012         void *hdr;
8013
8014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8015         if (!msg)
8016                 return;
8017
8018         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8019         if (!hdr) {
8020                 nlmsg_free(msg);
8021                 return;
8022         }
8023
8024         /* Userspace can always count this one always being set */
8025         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8026                 goto nla_put_failure;
8027
8028         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8029                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8030                                NL80211_REGDOM_TYPE_WORLD))
8031                         goto nla_put_failure;
8032         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8033                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8034                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8035                         goto nla_put_failure;
8036         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8037                    request->intersect) {
8038                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8039                                NL80211_REGDOM_TYPE_INTERSECTION))
8040                         goto nla_put_failure;
8041         } else {
8042                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8043                                NL80211_REGDOM_TYPE_COUNTRY) ||
8044                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8045                                    request->alpha2))
8046                         goto nla_put_failure;
8047         }
8048
8049         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8050             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8051                 goto nla_put_failure;
8052
8053         genlmsg_end(msg, hdr);
8054
8055         rcu_read_lock();
8056         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8057                                 GFP_ATOMIC);
8058         rcu_read_unlock();
8059
8060         return;
8061
8062 nla_put_failure:
8063         genlmsg_cancel(msg, hdr);
8064         nlmsg_free(msg);
8065 }
8066
8067 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8068                                     struct net_device *netdev,
8069                                     const u8 *buf, size_t len,
8070                                     enum nl80211_commands cmd, gfp_t gfp)
8071 {
8072         struct sk_buff *msg;
8073         void *hdr;
8074
8075         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8076         if (!msg)
8077                 return;
8078
8079         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8080         if (!hdr) {
8081                 nlmsg_free(msg);
8082                 return;
8083         }
8084
8085         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8086             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8087             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8088                 goto nla_put_failure;
8089
8090         genlmsg_end(msg, hdr);
8091
8092         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8093                                 nl80211_mlme_mcgrp.id, gfp);
8094         return;
8095
8096  nla_put_failure:
8097         genlmsg_cancel(msg, hdr);
8098         nlmsg_free(msg);
8099 }
8100
8101 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8102                           struct net_device *netdev, const u8 *buf,
8103                           size_t len, gfp_t gfp)
8104 {
8105         nl80211_send_mlme_event(rdev, netdev, buf, len,
8106                                 NL80211_CMD_AUTHENTICATE, gfp);
8107 }
8108
8109 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8110                            struct net_device *netdev, const u8 *buf,
8111                            size_t len, gfp_t gfp)
8112 {
8113         nl80211_send_mlme_event(rdev, netdev, buf, len,
8114                                 NL80211_CMD_ASSOCIATE, gfp);
8115 }
8116
8117 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8118                          struct net_device *netdev, const u8 *buf,
8119                          size_t len, gfp_t gfp)
8120 {
8121         nl80211_send_mlme_event(rdev, netdev, buf, len,
8122                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8123 }
8124
8125 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8126                            struct net_device *netdev, const u8 *buf,
8127                            size_t len, gfp_t gfp)
8128 {
8129         nl80211_send_mlme_event(rdev, netdev, buf, len,
8130                                 NL80211_CMD_DISASSOCIATE, gfp);
8131 }
8132
8133 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8134                                 struct net_device *netdev, const u8 *buf,
8135                                 size_t len, gfp_t gfp)
8136 {
8137         nl80211_send_mlme_event(rdev, netdev, buf, len,
8138                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8139 }
8140
8141 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8142                                   struct net_device *netdev, const u8 *buf,
8143                                   size_t len, gfp_t gfp)
8144 {
8145         nl80211_send_mlme_event(rdev, netdev, buf, len,
8146                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8147 }
8148
8149 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8150                                       struct net_device *netdev, int cmd,
8151                                       const u8 *addr, gfp_t gfp)
8152 {
8153         struct sk_buff *msg;
8154         void *hdr;
8155
8156         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8157         if (!msg)
8158                 return;
8159
8160         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8161         if (!hdr) {
8162                 nlmsg_free(msg);
8163                 return;
8164         }
8165
8166         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8167             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8168             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8169             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8170                 goto nla_put_failure;
8171
8172         genlmsg_end(msg, hdr);
8173
8174         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8175                                 nl80211_mlme_mcgrp.id, gfp);
8176         return;
8177
8178  nla_put_failure:
8179         genlmsg_cancel(msg, hdr);
8180         nlmsg_free(msg);
8181 }
8182
8183 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8184                                struct net_device *netdev, const u8 *addr,
8185                                gfp_t gfp)
8186 {
8187         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8188                                   addr, gfp);
8189 }
8190
8191 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8192                                 struct net_device *netdev, const u8 *addr,
8193                                 gfp_t gfp)
8194 {
8195         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8196                                   addr, gfp);
8197 }
8198
8199 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8200                                  struct net_device *netdev, const u8 *bssid,
8201                                  const u8 *req_ie, size_t req_ie_len,
8202                                  const u8 *resp_ie, size_t resp_ie_len,
8203                                  u16 status, gfp_t gfp)
8204 {
8205         struct sk_buff *msg;
8206         void *hdr;
8207
8208         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8209         if (!msg)
8210                 return;
8211
8212         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8213         if (!hdr) {
8214                 nlmsg_free(msg);
8215                 return;
8216         }
8217
8218         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8219             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8220             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8221             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8222             (req_ie &&
8223              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8224             (resp_ie &&
8225              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8226                 goto nla_put_failure;
8227
8228         genlmsg_end(msg, hdr);
8229
8230         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8231                                 nl80211_mlme_mcgrp.id, gfp);
8232         return;
8233
8234  nla_put_failure:
8235         genlmsg_cancel(msg, hdr);
8236         nlmsg_free(msg);
8237
8238 }
8239
8240 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8241                          struct net_device *netdev, const u8 *bssid,
8242                          const u8 *req_ie, size_t req_ie_len,
8243                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8244 {
8245         struct sk_buff *msg;
8246         void *hdr;
8247
8248         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8249         if (!msg)
8250                 return;
8251
8252         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8253         if (!hdr) {
8254                 nlmsg_free(msg);
8255                 return;
8256         }
8257
8258         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8259             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8260             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8261             (req_ie &&
8262              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8263             (resp_ie &&
8264              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8265                 goto nla_put_failure;
8266
8267         genlmsg_end(msg, hdr);
8268
8269         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8270                                 nl80211_mlme_mcgrp.id, gfp);
8271         return;
8272
8273  nla_put_failure:
8274         genlmsg_cancel(msg, hdr);
8275         nlmsg_free(msg);
8276
8277 }
8278
8279 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8280                                struct net_device *netdev, u16 reason,
8281                                const u8 *ie, size_t ie_len, bool from_ap)
8282 {
8283         struct sk_buff *msg;
8284         void *hdr;
8285
8286         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8287         if (!msg)
8288                 return;
8289
8290         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8291         if (!hdr) {
8292                 nlmsg_free(msg);
8293                 return;
8294         }
8295
8296         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8297             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8298             (from_ap && reason &&
8299              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8300             (from_ap &&
8301              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8302             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8303                 goto nla_put_failure;
8304
8305         genlmsg_end(msg, hdr);
8306
8307         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8308                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8309         return;
8310
8311  nla_put_failure:
8312         genlmsg_cancel(msg, hdr);
8313         nlmsg_free(msg);
8314
8315 }
8316
8317 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8318                              struct net_device *netdev, const u8 *bssid,
8319                              gfp_t gfp)
8320 {
8321         struct sk_buff *msg;
8322         void *hdr;
8323
8324         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8325         if (!msg)
8326                 return;
8327
8328         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8329         if (!hdr) {
8330                 nlmsg_free(msg);
8331                 return;
8332         }
8333
8334         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8335             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8336             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8337                 goto nla_put_failure;
8338
8339         genlmsg_end(msg, hdr);
8340
8341         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8342                                 nl80211_mlme_mcgrp.id, gfp);
8343         return;
8344
8345  nla_put_failure:
8346         genlmsg_cancel(msg, hdr);
8347         nlmsg_free(msg);
8348 }
8349
8350 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8351                 struct net_device *netdev,
8352                 const u8 *macaddr, const u8* ie, u8 ie_len,
8353                 gfp_t gfp)
8354 {
8355         struct sk_buff *msg;
8356         void *hdr;
8357
8358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8359         if (!msg)
8360                 return;
8361
8362         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8363         if (!hdr) {
8364                 nlmsg_free(msg);
8365                 return;
8366         }
8367
8368         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8369             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8370             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8371             (ie_len && ie &&
8372              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8373                 goto nla_put_failure;
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 nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8387                                  struct net_device *netdev, const u8 *addr,
8388                                  enum nl80211_key_type key_type, int key_id,
8389                                  const u8 *tsc, gfp_t gfp)
8390 {
8391         struct sk_buff *msg;
8392         void *hdr;
8393
8394         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8395         if (!msg)
8396                 return;
8397
8398         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8399         if (!hdr) {
8400                 nlmsg_free(msg);
8401                 return;
8402         }
8403
8404         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8405             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8406             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8407             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8408             (key_id != -1 &&
8409              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8410             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8411                 goto nla_put_failure;
8412
8413         genlmsg_end(msg, hdr);
8414
8415         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8416                                 nl80211_mlme_mcgrp.id, gfp);
8417         return;
8418
8419  nla_put_failure:
8420         genlmsg_cancel(msg, hdr);
8421         nlmsg_free(msg);
8422 }
8423
8424 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8425                                     struct ieee80211_channel *channel_before,
8426                                     struct ieee80211_channel *channel_after)
8427 {
8428         struct sk_buff *msg;
8429         void *hdr;
8430         struct nlattr *nl_freq;
8431
8432         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8433         if (!msg)
8434                 return;
8435
8436         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8437         if (!hdr) {
8438                 nlmsg_free(msg);
8439                 return;
8440         }
8441
8442         /*
8443          * Since we are applying the beacon hint to a wiphy we know its
8444          * wiphy_idx is valid
8445          */
8446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8447                 goto nla_put_failure;
8448
8449         /* Before */
8450         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8451         if (!nl_freq)
8452                 goto nla_put_failure;
8453         if (nl80211_msg_put_channel(msg, channel_before))
8454                 goto nla_put_failure;
8455         nla_nest_end(msg, nl_freq);
8456
8457         /* After */
8458         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8459         if (!nl_freq)
8460                 goto nla_put_failure;
8461         if (nl80211_msg_put_channel(msg, channel_after))
8462                 goto nla_put_failure;
8463         nla_nest_end(msg, nl_freq);
8464
8465         genlmsg_end(msg, hdr);
8466
8467         rcu_read_lock();
8468         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8469                                 GFP_ATOMIC);
8470         rcu_read_unlock();
8471
8472         return;
8473
8474 nla_put_failure:
8475         genlmsg_cancel(msg, hdr);
8476         nlmsg_free(msg);
8477 }
8478
8479 static void nl80211_send_remain_on_chan_event(
8480         int cmd, struct cfg80211_registered_device *rdev,
8481         struct wireless_dev *wdev, u64 cookie,
8482         struct ieee80211_channel *chan,
8483         unsigned int duration, gfp_t gfp)
8484 {
8485         struct sk_buff *msg;
8486         void *hdr;
8487
8488         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8489         if (!msg)
8490                 return;
8491
8492         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8493         if (!hdr) {
8494                 nlmsg_free(msg);
8495                 return;
8496         }
8497
8498         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8499             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8500                                          wdev->netdev->ifindex)) ||
8501             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8502             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8503             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8504                         NL80211_CHAN_NO_HT) ||
8505             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8506                 goto nla_put_failure;
8507
8508         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8509             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8510                 goto nla_put_failure;
8511
8512         genlmsg_end(msg, hdr);
8513
8514         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8515                                 nl80211_mlme_mcgrp.id, gfp);
8516         return;
8517
8518  nla_put_failure:
8519         genlmsg_cancel(msg, hdr);
8520         nlmsg_free(msg);
8521 }
8522
8523 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8524                                     struct wireless_dev *wdev, u64 cookie,
8525                                     struct ieee80211_channel *chan,
8526                                     unsigned int duration, gfp_t gfp)
8527 {
8528         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8529                                           rdev, wdev, cookie, chan,
8530                                           duration, gfp);
8531 }
8532
8533 void nl80211_send_remain_on_channel_cancel(
8534         struct cfg80211_registered_device *rdev,
8535         struct wireless_dev *wdev,
8536         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8537 {
8538         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8539                                           rdev, wdev, cookie, chan, 0, gfp);
8540 }
8541
8542 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8543                             struct net_device *dev, const u8 *mac_addr,
8544                             struct station_info *sinfo, gfp_t gfp)
8545 {
8546         struct sk_buff *msg;
8547
8548         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8549         if (!msg)
8550                 return;
8551
8552         if (nl80211_send_station(msg, 0, 0, 0,
8553                                  rdev, dev, mac_addr, sinfo) < 0) {
8554                 nlmsg_free(msg);
8555                 return;
8556         }
8557
8558         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8559                                 nl80211_mlme_mcgrp.id, gfp);
8560 }
8561
8562 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8563                                 struct net_device *dev, const u8 *mac_addr,
8564                                 gfp_t gfp)
8565 {
8566         struct sk_buff *msg;
8567         void *hdr;
8568
8569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8570         if (!msg)
8571                 return;
8572
8573         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8574         if (!hdr) {
8575                 nlmsg_free(msg);
8576                 return;
8577         }
8578
8579         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8580             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8581                 goto nla_put_failure;
8582
8583         genlmsg_end(msg, hdr);
8584
8585         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8586                                 nl80211_mlme_mcgrp.id, gfp);
8587         return;
8588
8589  nla_put_failure:
8590         genlmsg_cancel(msg, hdr);
8591         nlmsg_free(msg);
8592 }
8593
8594 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8595                                     struct net_device *dev, const u8 *mac_addr,
8596                                     enum nl80211_connect_failed_reason reason,
8597                                     gfp_t gfp)
8598 {
8599         struct sk_buff *msg;
8600         void *hdr;
8601
8602         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8603         if (!msg)
8604                 return;
8605
8606         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8607         if (!hdr) {
8608                 nlmsg_free(msg);
8609                 return;
8610         }
8611
8612         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8613             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8614             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8615                 goto nla_put_failure;
8616
8617         genlmsg_end(msg, hdr);
8618
8619         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8620                                 nl80211_mlme_mcgrp.id, gfp);
8621         return;
8622
8623  nla_put_failure:
8624         genlmsg_cancel(msg, hdr);
8625         nlmsg_free(msg);
8626 }
8627
8628 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8629                                        const u8 *addr, gfp_t gfp)
8630 {
8631         struct wireless_dev *wdev = dev->ieee80211_ptr;
8632         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8633         struct sk_buff *msg;
8634         void *hdr;
8635         int err;
8636         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8637
8638         if (!nlportid)
8639                 return false;
8640
8641         msg = nlmsg_new(100, gfp);
8642         if (!msg)
8643                 return true;
8644
8645         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8646         if (!hdr) {
8647                 nlmsg_free(msg);
8648                 return true;
8649         }
8650
8651         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8652             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8653             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8654                 goto nla_put_failure;
8655
8656         err = genlmsg_end(msg, hdr);
8657         if (err < 0) {
8658                 nlmsg_free(msg);
8659                 return true;
8660         }
8661
8662         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8663         return true;
8664
8665  nla_put_failure:
8666         genlmsg_cancel(msg, hdr);
8667         nlmsg_free(msg);
8668         return true;
8669 }
8670
8671 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8672 {
8673         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8674                                           addr, gfp);
8675 }
8676
8677 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8678                                     const u8 *addr, gfp_t gfp)
8679 {
8680         return __nl80211_unexpected_frame(dev,
8681                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8682                                           addr, gfp);
8683 }
8684
8685 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8686                       struct wireless_dev *wdev, u32 nlportid,
8687                       int freq, int sig_dbm,
8688                       const u8 *buf, size_t len, gfp_t gfp)
8689 {
8690         struct net_device *netdev = wdev->netdev;
8691         struct sk_buff *msg;
8692         void *hdr;
8693
8694         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8695         if (!msg)
8696                 return -ENOMEM;
8697
8698         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8699         if (!hdr) {
8700                 nlmsg_free(msg);
8701                 return -ENOMEM;
8702         }
8703
8704         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8705             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8706                                         netdev->ifindex)) ||
8707             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8708             (sig_dbm &&
8709              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8710             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8711                 goto nla_put_failure;
8712
8713         genlmsg_end(msg, hdr);
8714
8715         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8716
8717  nla_put_failure:
8718         genlmsg_cancel(msg, hdr);
8719         nlmsg_free(msg);
8720         return -ENOBUFS;
8721 }
8722
8723 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8724                                  struct wireless_dev *wdev, u64 cookie,
8725                                  const u8 *buf, size_t len, bool ack,
8726                                  gfp_t gfp)
8727 {
8728         struct net_device *netdev = wdev->netdev;
8729         struct sk_buff *msg;
8730         void *hdr;
8731
8732         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8733         if (!msg)
8734                 return;
8735
8736         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8737         if (!hdr) {
8738                 nlmsg_free(msg);
8739                 return;
8740         }
8741
8742         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8743             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8744                                    netdev->ifindex)) ||
8745             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8746             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8747             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8748                 goto nla_put_failure;
8749
8750         genlmsg_end(msg, hdr);
8751
8752         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8753         return;
8754
8755  nla_put_failure:
8756         genlmsg_cancel(msg, hdr);
8757         nlmsg_free(msg);
8758 }
8759
8760 void
8761 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8762                              struct net_device *netdev,
8763                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8764                              gfp_t gfp)
8765 {
8766         struct sk_buff *msg;
8767         struct nlattr *pinfoattr;
8768         void *hdr;
8769
8770         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8771         if (!msg)
8772                 return;
8773
8774         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8775         if (!hdr) {
8776                 nlmsg_free(msg);
8777                 return;
8778         }
8779
8780         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8781             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8782                 goto nla_put_failure;
8783
8784         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8785         if (!pinfoattr)
8786                 goto nla_put_failure;
8787
8788         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8789                         rssi_event))
8790                 goto nla_put_failure;
8791
8792         nla_nest_end(msg, pinfoattr);
8793
8794         genlmsg_end(msg, hdr);
8795
8796         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8797                                 nl80211_mlme_mcgrp.id, gfp);
8798         return;
8799
8800  nla_put_failure:
8801         genlmsg_cancel(msg, hdr);
8802         nlmsg_free(msg);
8803 }
8804
8805 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8806                               struct net_device *netdev, const u8 *bssid,
8807                               const u8 *replay_ctr, gfp_t gfp)
8808 {
8809         struct sk_buff *msg;
8810         struct nlattr *rekey_attr;
8811         void *hdr;
8812
8813         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8814         if (!msg)
8815                 return;
8816
8817         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8818         if (!hdr) {
8819                 nlmsg_free(msg);
8820                 return;
8821         }
8822
8823         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8824             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8825             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8826                 goto nla_put_failure;
8827
8828         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8829         if (!rekey_attr)
8830                 goto nla_put_failure;
8831
8832         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8833                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8834                 goto nla_put_failure;
8835
8836         nla_nest_end(msg, rekey_attr);
8837
8838         genlmsg_end(msg, hdr);
8839
8840         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8841                                 nl80211_mlme_mcgrp.id, gfp);
8842         return;
8843
8844  nla_put_failure:
8845         genlmsg_cancel(msg, hdr);
8846         nlmsg_free(msg);
8847 }
8848
8849 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8850                                     struct net_device *netdev, int index,
8851                                     const u8 *bssid, bool preauth, gfp_t gfp)
8852 {
8853         struct sk_buff *msg;
8854         struct nlattr *attr;
8855         void *hdr;
8856
8857         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8858         if (!msg)
8859                 return;
8860
8861         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8862         if (!hdr) {
8863                 nlmsg_free(msg);
8864                 return;
8865         }
8866
8867         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8868             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8869                 goto nla_put_failure;
8870
8871         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8872         if (!attr)
8873                 goto nla_put_failure;
8874
8875         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8876             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8877             (preauth &&
8878              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8879                 goto nla_put_failure;
8880
8881         nla_nest_end(msg, attr);
8882
8883         genlmsg_end(msg, hdr);
8884
8885         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8886                                 nl80211_mlme_mcgrp.id, gfp);
8887         return;
8888
8889  nla_put_failure:
8890         genlmsg_cancel(msg, hdr);
8891         nlmsg_free(msg);
8892 }
8893
8894 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8895                               struct net_device *netdev,
8896                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8897 {
8898         struct sk_buff *msg;
8899         void *hdr;
8900
8901         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8902         if (!msg)
8903                 return;
8904
8905         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8906         if (!hdr) {
8907                 nlmsg_free(msg);
8908                 return;
8909         }
8910
8911         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8912                 goto nla_put_failure;
8913
8914         if (nl80211_send_chandef(msg, chandef))
8915                 goto nla_put_failure;
8916
8917         genlmsg_end(msg, hdr);
8918
8919         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8920                                 nl80211_mlme_mcgrp.id, gfp);
8921         return;
8922
8923  nla_put_failure:
8924         genlmsg_cancel(msg, hdr);
8925         nlmsg_free(msg);
8926 }
8927
8928 void
8929 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8930                             struct net_device *netdev, const u8 *peer,
8931                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8932 {
8933         struct sk_buff *msg;
8934         struct nlattr *pinfoattr;
8935         void *hdr;
8936
8937         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8938         if (!msg)
8939                 return;
8940
8941         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8942         if (!hdr) {
8943                 nlmsg_free(msg);
8944                 return;
8945         }
8946
8947         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8948             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8949             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8950                 goto nla_put_failure;
8951
8952         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8953         if (!pinfoattr)
8954                 goto nla_put_failure;
8955
8956         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8957                 goto nla_put_failure;
8958
8959         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8960                 goto nla_put_failure;
8961
8962         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
8963                 goto nla_put_failure;
8964
8965         nla_nest_end(msg, pinfoattr);
8966
8967         genlmsg_end(msg, hdr);
8968
8969         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8970                                 nl80211_mlme_mcgrp.id, gfp);
8971         return;
8972
8973  nla_put_failure:
8974         genlmsg_cancel(msg, hdr);
8975         nlmsg_free(msg);
8976 }
8977
8978 void
8979 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8980                                 struct net_device *netdev, const u8 *peer,
8981                                 u32 num_packets, gfp_t gfp)
8982 {
8983         struct sk_buff *msg;
8984         struct nlattr *pinfoattr;
8985         void *hdr;
8986
8987         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8988         if (!msg)
8989                 return;
8990
8991         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8992         if (!hdr) {
8993                 nlmsg_free(msg);
8994                 return;
8995         }
8996
8997         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8998             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8999             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9000                 goto nla_put_failure;
9001
9002         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9003         if (!pinfoattr)
9004                 goto nla_put_failure;
9005
9006         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9007                 goto nla_put_failure;
9008
9009         nla_nest_end(msg, pinfoattr);
9010
9011         genlmsg_end(msg, hdr);
9012
9013         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9014                                 nl80211_mlme_mcgrp.id, gfp);
9015         return;
9016
9017  nla_put_failure:
9018         genlmsg_cancel(msg, hdr);
9019         nlmsg_free(msg);
9020 }
9021
9022 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9023                            u64 cookie, bool acked, gfp_t gfp)
9024 {
9025         struct wireless_dev *wdev = dev->ieee80211_ptr;
9026         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9027         struct sk_buff *msg;
9028         void *hdr;
9029         int err;
9030
9031         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9032
9033         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9034
9035         if (!msg)
9036                 return;
9037
9038         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9039         if (!hdr) {
9040                 nlmsg_free(msg);
9041                 return;
9042         }
9043
9044         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9045             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9046             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9047             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9048             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9049                 goto nla_put_failure;
9050
9051         err = genlmsg_end(msg, hdr);
9052         if (err < 0) {
9053                 nlmsg_free(msg);
9054                 return;
9055         }
9056
9057         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9058                                 nl80211_mlme_mcgrp.id, gfp);
9059         return;
9060
9061  nla_put_failure:
9062         genlmsg_cancel(msg, hdr);
9063         nlmsg_free(msg);
9064 }
9065 EXPORT_SYMBOL(cfg80211_probe_status);
9066
9067 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9068                                  const u8 *frame, size_t len,
9069                                  int freq, int sig_dbm)
9070 {
9071         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9072         struct sk_buff *msg;
9073         void *hdr;
9074         struct cfg80211_beacon_registration *reg;
9075
9076         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9077
9078         spin_lock_bh(&rdev->beacon_registrations_lock);
9079         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9080                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9081                 if (!msg) {
9082                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9083                         return;
9084                 }
9085
9086                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9087                 if (!hdr)
9088                         goto nla_put_failure;
9089
9090                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9091                     (freq &&
9092                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9093                     (sig_dbm &&
9094                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9095                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9096                         goto nla_put_failure;
9097
9098                 genlmsg_end(msg, hdr);
9099
9100                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9101         }
9102         spin_unlock_bh(&rdev->beacon_registrations_lock);
9103         return;
9104
9105  nla_put_failure:
9106         spin_unlock_bh(&rdev->beacon_registrations_lock);
9107         if (hdr)
9108                 genlmsg_cancel(msg, hdr);
9109         nlmsg_free(msg);
9110 }
9111 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9112
9113 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9114                                 enum nl80211_tdls_operation oper,
9115                                 u16 reason_code, gfp_t gfp)
9116 {
9117         struct wireless_dev *wdev = dev->ieee80211_ptr;
9118         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9119         struct sk_buff *msg;
9120         void *hdr;
9121         int err;
9122
9123         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9124                                          reason_code);
9125
9126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9127         if (!msg)
9128                 return;
9129
9130         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9131         if (!hdr) {
9132                 nlmsg_free(msg);
9133                 return;
9134         }
9135
9136         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9137             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9138             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9139             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9140             (reason_code > 0 &&
9141              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9142                 goto nla_put_failure;
9143
9144         err = genlmsg_end(msg, hdr);
9145         if (err < 0) {
9146                 nlmsg_free(msg);
9147                 return;
9148         }
9149
9150         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9151                                 nl80211_mlme_mcgrp.id, gfp);
9152         return;
9153
9154  nla_put_failure:
9155         genlmsg_cancel(msg, hdr);
9156         nlmsg_free(msg);
9157 }
9158 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9159
9160 static int nl80211_netlink_notify(struct notifier_block * nb,
9161                                   unsigned long state,
9162                                   void *_notify)
9163 {
9164         struct netlink_notify *notify = _notify;
9165         struct cfg80211_registered_device *rdev;
9166         struct wireless_dev *wdev;
9167         struct cfg80211_beacon_registration *reg, *tmp;
9168
9169         if (state != NETLINK_URELEASE)
9170                 return NOTIFY_DONE;
9171
9172         rcu_read_lock();
9173
9174         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9175                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9176                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9177
9178                 spin_lock_bh(&rdev->beacon_registrations_lock);
9179                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9180                                          list) {
9181                         if (reg->nlportid == notify->portid) {
9182                                 list_del(&reg->list);
9183                                 kfree(reg);
9184                                 break;
9185                         }
9186                 }
9187                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9188         }
9189
9190         rcu_read_unlock();
9191
9192         return NOTIFY_DONE;
9193 }
9194
9195 static struct notifier_block nl80211_netlink_notifier = {
9196         .notifier_call = nl80211_netlink_notify,
9197 };
9198
9199 /* initialisation/exit functions */
9200
9201 int nl80211_init(void)
9202 {
9203         int err;
9204
9205         err = genl_register_family_with_ops(&nl80211_fam,
9206                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9207         if (err)
9208                 return err;
9209
9210         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9211         if (err)
9212                 goto err_out;
9213
9214         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9215         if (err)
9216                 goto err_out;
9217
9218         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9219         if (err)
9220                 goto err_out;
9221
9222         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9223         if (err)
9224                 goto err_out;
9225
9226 #ifdef CONFIG_NL80211_TESTMODE
9227         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9228         if (err)
9229                 goto err_out;
9230 #endif
9231
9232         err = netlink_register_notifier(&nl80211_netlink_notifier);
9233         if (err)
9234                 goto err_out;
9235
9236         return 0;
9237  err_out:
9238         genl_unregister_family(&nl80211_fam);
9239         return err;
9240 }
9241
9242 void nl80211_exit(void)
9243 {
9244         netlink_unregister_notifier(&nl80211_netlink_notifier);
9245         genl_unregister_family(&nl80211_fam);
9246 }