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 <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  41         .name = "nl80211",      /* have users key off the name instead */
  42         .hdrsize = 0,           /* no private header */
  43         .version = 1,           /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         assert_cfg80211_lock();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 mutex_lock(&rdev->devlist_mtx);
  84                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  85                         if (have_ifidx && wdev->netdev &&
  86                             wdev->netdev->ifindex == ifidx) {
  87                                 result = wdev;
  88                                 break;
  89                         }
  90                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  91                                 result = wdev;
  92                                 break;
  93                         }
  94                 }
  95                 mutex_unlock(&rdev->devlist_mtx);
  96
  97                 if (result)
  98                         break;
  99         }
 100
 101         if (result)
 102                 return result;
 103         return ERR_PTR(-ENODEV);
 104 }
 105
 106 static struct cfg80211_registered_device *
 107 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 108 {
 109         struct cfg80211_registered_device *rdev = NULL, *tmp;
 110         struct net_device *netdev;
 111
 112         assert_cfg80211_lock();
 113
 114         if (!attrs[NL80211_ATTR_WIPHY] &&
 115             !attrs[NL80211_ATTR_IFINDEX] &&
 116             !attrs[NL80211_ATTR_WDEV])
 117                 return ERR_PTR(-EINVAL);
 118
 119         if (attrs[NL80211_ATTR_WIPHY])
 120                 rdev = cfg80211_rdev_by_wiphy_idx(
 121                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 122
 123         if (attrs[NL80211_ATTR_WDEV]) {
 124                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 125                 struct wireless_dev *wdev;
 126                 bool found = false;
 127
 128                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 129                 if (tmp) {
 130                         /* make sure wdev exists */
 131                         mutex_lock(&tmp->devlist_mtx);
 132                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 133                                 if (wdev->identifier != (u32)wdev_id)
 134                                         continue;
 135                                 found = true;
 136                                 break;
 137                         }
 138                         mutex_unlock(&tmp->devlist_mtx);
 139
 140                         if (!found)
 141                                 tmp = NULL;
 142
 143                         if (rdev && tmp != rdev)
 144                                 return ERR_PTR(-EINVAL);
 145                         rdev = tmp;
 146                 }
 147         }
 148
 149         if (attrs[NL80211_ATTR_IFINDEX]) {
 150                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 151                 netdev = dev_get_by_index(netns, ifindex);
 152                 if (netdev) {
 153                         if (netdev->ieee80211_ptr)
 154                                 tmp = wiphy_to_dev(
 155                                                 netdev->ieee80211_ptr->wiphy);
 156                         else
 157                                 tmp = NULL;
 158
 159                         dev_put(netdev);
 160
 161                         /* not wireless device -- return error */
 162                         if (!tmp)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         /* mismatch -- return error */
 166                         if (rdev && tmp != rdev)
 167                                 return ERR_PTR(-EINVAL);
 168
 169                         rdev = tmp;
 170                 }
 171         }
 172
 173         if (!rdev)
 174                 return ERR_PTR(-ENODEV);
 175
 176         if (netns != wiphy_net(&rdev->wiphy))
 177                 return ERR_PTR(-ENODEV);
 178
 179         return rdev;
 180 }
 181
 182 /*
 183  * This function returns a pointer to the driver
 184  * that the genl_info item that is passed refers to.
 185  * If successful, it returns non-NULL and also locks
 186  * the driver's mutex!
 187  *
 188  * This means that you need to call cfg80211_unlock_rdev()
 189  * before being allowed to acquire &cfg80211_mutex!
 190  *
 191  * This is necessary because we need to lock the global
 192  * mutex to get an item off the list safely, and then
 193  * we lock the rdev mutex so it doesn't go away under us.
 194  *
 195  * We don't want to keep cfg80211_mutex locked
 196  * for all the time in order to allow requests on
 197  * other interfaces to go through at the same time.
 198  *
 199  * The result of this can be a PTR_ERR and hence must
 200  * be checked with IS_ERR() for errors.
 201  */
 202 static struct cfg80211_registered_device *
 203 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 204 {
 205         struct cfg80211_registered_device *rdev;
 206
 207         mutex_lock(&cfg80211_mutex);
 208         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 209
 210         /* if it is not an error we grab the lock on
 211          * it to assure it won't be going away while
 212          * we operate on it */
 213         if (!IS_ERR(rdev))
 214                 mutex_lock(&rdev->mtx);
 215
 216         mutex_unlock(&cfg80211_mutex);
 217
 218         return rdev;
 219 }
 220
 221 /* policy for the attributes */
 222 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 223         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 224         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 225                                       .len = 20-1 },
 226         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 227
 228         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 232         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 233
 234         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 236         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 238         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 239
 240         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 242         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 243
 244         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 245         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 246
 247         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 248         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 249                                     .len = WLAN_MAX_KEY_LEN },
 250         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 251         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 252         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 253         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 254         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 257         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 258         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 259                                        .len = IEEE80211_MAX_DATA_LEN },
 260         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 261                                        .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 263         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 264         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 265         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 266                                                .len = NL80211_MAX_SUPP_RATES },
 267         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 268         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 269         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 270         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 271                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 272         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 273
 274         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 275         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 280         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 281                                            .len = NL80211_MAX_SUPP_RATES },
 282         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 283
 284         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 286
 287         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 288
 289         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 290         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 291                               .len = IEEE80211_MAX_DATA_LEN },
 292         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 293         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 294
 295         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 296                                 .len = IEEE80211_MAX_SSID_LEN },
 297         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 298         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_STA_FLAGS2] = {
 303                 .len = sizeof(struct nl80211_sta_flag_update),
 304         },
 305         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 307         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 309         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 311         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 312         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 313         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 314                                  .len = WLAN_PMKID_LEN },
 315         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 316         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 317         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 319                                  .len = IEEE80211_MAX_DATA_LEN },
 320         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 321         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 323         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 326         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 330         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 331         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 335         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 336         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 339         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 340                                          .len = IEEE80211_MAX_DATA_LEN },
 341         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 342                                          .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 345         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 352         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 353                                       .len = IEEE80211_MAX_DATA_LEN },
 354         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 355         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 357                 .len = NL80211_HT_CAPABILITY_LEN
 358         },
 359         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 360         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 361         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 362         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 363         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 364         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 366         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 367         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 368         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 369         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 370         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 371         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 372         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 373         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 374         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 375         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 376                 .len = NL80211_VHT_CAPABILITY_LEN,
 377         },
 378         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 379         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 380                                   .len = IEEE80211_MAX_DATA_LEN },
 381 };
 382
 383 /* policy for the key attributes */
 384 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 385         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 386         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 387         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 388         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 389         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 390         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 391         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 392         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 393 };
 394
 395 /* policy for the key default flags */
 396 static const struct nla_policy
 397 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 398         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 399         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for WoWLAN attributes */
 403 static const struct nla_policy
 404 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 405         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 406         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 407         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 408         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 409         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 410         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 411         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 412         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 413         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 414 };
 415
 416 static const struct nla_policy
 417 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 418         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 419         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 420         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 421         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 422         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 423         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 424         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 425                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 426         },
 427         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 428                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 429         },
 430         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 431         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 432         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 433 };
 434
 435 /* policy for GTK rekey offload attributes */
 436 static const struct nla_policy
 437 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 438         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 439         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 440         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 441 };
 442
 443 static const struct nla_policy
 444 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 445         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 446                                                  .len = IEEE80211_MAX_SSID_LEN },
 447         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 448 };
 449
 450 /* ifidx get helper */
 451 static int nl80211_get_ifidx(struct netlink_callback *cb)
 452 {
 453         int res;
 454
 455         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 456                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 457                           nl80211_policy);
 458         if (res)
 459                 return res;
 460
 461         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 462                 return -EINVAL;
 463
 464         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 465         if (!res)
 466                 return -EINVAL;
 467         return res;
 468 }
 469
 470 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 471                                        struct netlink_callback *cb,
 472                                        struct cfg80211_registered_device **rdev,
 473                                        struct net_device **dev)
 474 {
 475         int ifidx = cb->args[0];
 476         int err;
 477
 478         if (!ifidx)
 479                 ifidx = nl80211_get_ifidx(cb);
 480         if (ifidx < 0)
 481                 return ifidx;
 482
 483         cb->args[0] = ifidx;
 484
 485         rtnl_lock();
 486
 487         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 488         if (!*dev) {
 489                 err = -ENODEV;
 490                 goto out_rtnl;
 491         }
 492
 493         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 494         if (IS_ERR(*rdev)) {
 495                 err = PTR_ERR(*rdev);
 496                 goto out_rtnl;
 497         }
 498
 499         return 0;
 500  out_rtnl:
 501         rtnl_unlock();
 502         return err;
 503 }
 504
 505 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 506 {
 507         cfg80211_unlock_rdev(rdev);
 508         rtnl_unlock();
 509 }
 510
 511 /* IE validation */
 512 static bool is_valid_ie_attr(const struct nlattr *attr)
 513 {
 514         const u8 *pos;
 515         int len;
 516
 517         if (!attr)
 518                 return true;
 519
 520         pos = nla_data(attr);
 521         len = nla_len(attr);
 522
 523         while (len) {
 524                 u8 elemlen;
 525
 526                 if (len < 2)
 527                         return false;
 528                 len -= 2;
 529
 530                 elemlen = pos[1];
 531                 if (elemlen > len)
 532                         return false;
 533
 534                 len -= elemlen;
 535                 pos += 2 + elemlen;
 536         }
 537
 538         return true;
 539 }
 540
 541 /* message building helper */
 542 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 543                                    int flags, u8 cmd)
 544 {
 545         /* since there is no private header just add the generic one */
 546         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 547 }
 548
 549 static int nl80211_msg_put_channel(struct sk_buff *msg,
 550                                    struct ieee80211_channel *chan,
 551                                    bool large)
 552 {
 553         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 554                         chan->center_freq))
 555                 goto nla_put_failure;
 556
 557         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 558             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 559                 goto nla_put_failure;
 560         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 561             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 562                 goto nla_put_failure;
 563         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 564             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 565                 goto nla_put_failure;
 566         if (chan->flags & IEEE80211_CHAN_RADAR) {
 567                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 568                         goto nla_put_failure;
 569                 if (large) {
 570                         u32 time;
 571
 572                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 573
 574                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 575                                         chan->dfs_state))
 576                                 goto nla_put_failure;
 577                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 578                                         time))
 579                                 goto nla_put_failure;
 580                 }
 581         }
 582
 583         if (large) {
 584                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 585                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 586                         goto nla_put_failure;
 587                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 588                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 589                         goto nla_put_failure;
 590                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 591                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 592                         goto nla_put_failure;
 593                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 594                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 595                         goto nla_put_failure;
 596         }
 597
 598         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 599                         DBM_TO_MBM(chan->max_power)))
 600                 goto nla_put_failure;
 601
 602         return 0;
 603
 604  nla_put_failure:
 605         return -ENOBUFS;
 606 }
 607
 608 /* netlink command implementations */
 609
 610 struct key_parse {
 611         struct key_params p;
 612         int idx;
 613         int type;
 614         bool def, defmgmt;
 615         bool def_uni, def_multi;
 616 };
 617
 618 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 619 {
 620         struct nlattr *tb[NL80211_KEY_MAX + 1];
 621         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 622                                    nl80211_key_policy);
 623         if (err)
 624                 return err;
 625
 626         k->def = !!tb[NL80211_KEY_DEFAULT];
 627         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 628
 629         if (k->def) {
 630                 k->def_uni = true;
 631                 k->def_multi = true;
 632         }
 633         if (k->defmgmt)
 634                 k->def_multi = true;
 635
 636         if (tb[NL80211_KEY_IDX])
 637                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 638
 639         if (tb[NL80211_KEY_DATA]) {
 640                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 641                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 642         }
 643
 644         if (tb[NL80211_KEY_SEQ]) {
 645                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 646                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 647         }
 648
 649         if (tb[NL80211_KEY_CIPHER])
 650                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 651
 652         if (tb[NL80211_KEY_TYPE]) {
 653                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 654                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 655                         return -EINVAL;
 656         }
 657
 658         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 659                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 660                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 661                                        tb[NL80211_KEY_DEFAULT_TYPES],
 662                                        nl80211_key_default_policy);
 663                 if (err)
 664                         return err;
 665
 666                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 667                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 668         }
 669
 670         return 0;
 671 }
 672
 673 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 674 {
 675         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 676                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 677                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 678         }
 679
 680         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 681                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 682                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 683         }
 684
 685         if (info->attrs[NL80211_ATTR_KEY_IDX])
 686                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 687
 688         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 689                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 690
 691         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 692         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 693
 694         if (k->def) {
 695                 k->def_uni = true;
 696                 k->def_multi = true;
 697         }
 698         if (k->defmgmt)
 699                 k->def_multi = true;
 700
 701         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 702                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 703                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 704                         return -EINVAL;
 705         }
 706
 707         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 708                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 709                 int err = nla_parse_nested(
 710                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 711                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 712                                 nl80211_key_default_policy);
 713                 if (err)
 714                         return err;
 715
 716                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 717                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 718         }
 719
 720         return 0;
 721 }
 722
 723 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 724 {
 725         int err;
 726
 727         memset(k, 0, sizeof(*k));
 728         k->idx = -1;
 729         k->type = -1;
 730
 731         if (info->attrs[NL80211_ATTR_KEY])
 732                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 733         else
 734                 err = nl80211_parse_key_old(info, k);
 735
 736         if (err)
 737                 return err;
 738
 739         if (k->def && k->defmgmt)
 740                 return -EINVAL;
 741
 742         if (k->defmgmt) {
 743                 if (k->def_uni || !k->def_multi)
 744                         return -EINVAL;
 745         }
 746
 747         if (k->idx != -1) {
 748                 if (k->defmgmt) {
 749                         if (k->idx < 4 || k->idx > 5)
 750                                 return -EINVAL;
 751                 } else if (k->def) {
 752                         if (k->idx < 0 || k->idx > 3)
 753                                 return -EINVAL;
 754                 } else {
 755                         if (k->idx < 0 || k->idx > 5)
 756                                 return -EINVAL;
 757                 }
 758         }
 759
 760         return 0;
 761 }
 762
 763 static struct cfg80211_cached_keys *
 764 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 765                        struct nlattr *keys, bool *no_ht)
 766 {
 767         struct key_parse parse;
 768         struct nlattr *key;
 769         struct cfg80211_cached_keys *result;
 770         int rem, err, def = 0;
 771
 772         result = kzalloc(sizeof(*result), GFP_KERNEL);
 773         if (!result)
 774                 return ERR_PTR(-ENOMEM);
 775
 776         result->def = -1;
 777         result->defmgmt = -1;
 778
 779         nla_for_each_nested(key, keys, rem) {
 780                 memset(&parse, 0, sizeof(parse));
 781                 parse.idx = -1;
 782
 783                 err = nl80211_parse_key_new(key, &parse);
 784                 if (err)
 785                         goto error;
 786                 err = -EINVAL;
 787                 if (!parse.p.key)
 788                         goto error;
 789                 if (parse.idx < 0 || parse.idx > 4)
 790                         goto error;
 791                 if (parse.def) {
 792                         if (def)
 793                                 goto error;
 794                         def = 1;
 795                         result->def = parse.idx;
 796                         if (!parse.def_uni || !parse.def_multi)
 797                                 goto error;
 798                 } else if (parse.defmgmt)
 799                         goto error;
 800                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 801                                                      parse.idx, false, NULL);
 802                 if (err)
 803                         goto error;
 804                 result->params[parse.idx].cipher = parse.p.cipher;
 805                 result->params[parse.idx].key_len = parse.p.key_len;
 806                 result->params[parse.idx].key = result->data[parse.idx];
 807                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 808
 809                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 810                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 811                         if (no_ht)
 812                                 *no_ht = true;
 813                 }
 814         }
 815
 816         return result;
 817  error:
 818         kfree(result);
 819         return ERR_PTR(err);
 820 }
 821
 822 static int nl80211_key_allowed(struct wireless_dev *wdev)
 823 {
 824         ASSERT_WDEV_LOCK(wdev);
 825
 826         switch (wdev->iftype) {
 827         case NL80211_IFTYPE_AP:
 828         case NL80211_IFTYPE_AP_VLAN:
 829         case NL80211_IFTYPE_P2P_GO:
 830         case NL80211_IFTYPE_MESH_POINT:
 831                 break;
 832         case NL80211_IFTYPE_ADHOC:
 833                 if (!wdev->current_bss)
 834                         return -ENOLINK;
 835                 break;
 836         case NL80211_IFTYPE_STATION:
 837         case NL80211_IFTYPE_P2P_CLIENT:
 838                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 839                         return -ENOLINK;
 840                 break;
 841         default:
 842                 return -EINVAL;
 843         }
 844
 845         return 0;
 846 }
 847
 848 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 849 {
 850         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 851         int i;
 852
 853         if (!nl_modes)
 854                 goto nla_put_failure;
 855
 856         i = 0;
 857         while (ifmodes) {
 858                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 859                         goto nla_put_failure;
 860                 ifmodes >>= 1;
 861                 i++;
 862         }
 863
 864         nla_nest_end(msg, nl_modes);
 865         return 0;
 866
 867 nla_put_failure:
 868         return -ENOBUFS;
 869 }
 870
 871 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 872                                           struct sk_buff *msg,
 873                                           bool large)
 874 {
 875         struct nlattr *nl_combis;
 876         int i, j;
 877
 878         nl_combis = nla_nest_start(msg,
 879                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 880         if (!nl_combis)
 881                 goto nla_put_failure;
 882
 883         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 884                 const struct ieee80211_iface_combination *c;
 885                 struct nlattr *nl_combi, *nl_limits;
 886
 887                 c = &wiphy->iface_combinations[i];
 888
 889                 nl_combi = nla_nest_start(msg, i + 1);
 890                 if (!nl_combi)
 891                         goto nla_put_failure;
 892
 893                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 894                 if (!nl_limits)
 895                         goto nla_put_failure;
 896
 897                 for (j = 0; j < c->n_limits; j++) {
 898                         struct nlattr *nl_limit;
 899
 900                         nl_limit = nla_nest_start(msg, j + 1);
 901                         if (!nl_limit)
 902                                 goto nla_put_failure;
 903                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 904                                         c->limits[j].max))
 905                                 goto nla_put_failure;
 906                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 907                                                 c->limits[j].types))
 908                                 goto nla_put_failure;
 909                         nla_nest_end(msg, nl_limit);
 910                 }
 911
 912                 nla_nest_end(msg, nl_limits);
 913
 914                 if (c->beacon_int_infra_match &&
 915                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 916                         goto nla_put_failure;
 917                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 918                                 c->num_different_channels) ||
 919                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 920                                 c->max_interfaces))
 921                         goto nla_put_failure;
 922                 if (large &&
 923                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 924                                 c->radar_detect_widths))
 925                         goto nla_put_failure;
 926
 927                 nla_nest_end(msg, nl_combi);
 928         }
 929
 930         nla_nest_end(msg, nl_combis);
 931
 932         return 0;
 933 nla_put_failure:
 934         return -ENOBUFS;
 935 }
 936
 937 #ifdef CONFIG_PM
 938 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 939                                         struct sk_buff *msg)
 940 {
 941         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 942         struct nlattr *nl_tcp;
 943
 944         if (!tcp)
 945                 return 0;
 946
 947         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 948         if (!nl_tcp)
 949                 return -ENOBUFS;
 950
 951         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 952                         tcp->data_payload_max))
 953                 return -ENOBUFS;
 954
 955         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 956                         tcp->data_payload_max))
 957                 return -ENOBUFS;
 958
 959         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 960                 return -ENOBUFS;
 961
 962         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 963                                 sizeof(*tcp->tok), tcp->tok))
 964                 return -ENOBUFS;
 965
 966         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 967                         tcp->data_interval_max))
 968                 return -ENOBUFS;
 969
 970         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 971                         tcp->wake_payload_max))
 972                 return -ENOBUFS;
 973
 974         nla_nest_end(msg, nl_tcp);
 975         return 0;
 976 }
 977
 978 static int nl80211_send_wowlan(struct sk_buff *msg,
 979                                struct cfg80211_registered_device *dev,
 980                                bool large)
 981 {
 982         struct nlattr *nl_wowlan;
 983
 984         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 985                 return 0;
 986
 987         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 988         if (!nl_wowlan)
 989                 return -ENOBUFS;
 990
 991         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 992              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 993             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
 994              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 995             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 996              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 997             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 998              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 999             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1000              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1001             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1002              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1003             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1004              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1005             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1006              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1007                 return -ENOBUFS;
1008
1009         if (dev->wiphy.wowlan.n_patterns) {
1010                 struct nl80211_wowlan_pattern_support pat = {
1011                         .max_patterns = dev->wiphy.wowlan.n_patterns,
1012                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
1013                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
1014                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
1015                 };
1016
1017                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1018                             sizeof(pat), &pat))
1019                         return -ENOBUFS;
1020         }
1021
1022         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1023                 return -ENOBUFS;
1024
1025         nla_nest_end(msg, nl_wowlan);
1026
1027         return 0;
1028 }
1029 #endif
1030
1031 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1032                                       struct ieee80211_supported_band *sband)
1033 {
1034         struct nlattr *nl_rates, *nl_rate;
1035         struct ieee80211_rate *rate;
1036         int i;
1037
1038         /* add HT info */
1039         if (sband->ht_cap.ht_supported &&
1040             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1041                      sizeof(sband->ht_cap.mcs),
1042                      &sband->ht_cap.mcs) ||
1043              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1044                          sband->ht_cap.cap) ||
1045              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1046                         sband->ht_cap.ampdu_factor) ||
1047              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1048                         sband->ht_cap.ampdu_density)))
1049                 return -ENOBUFS;
1050
1051         /* add VHT info */
1052         if (sband->vht_cap.vht_supported &&
1053             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1054                      sizeof(sband->vht_cap.vht_mcs),
1055                      &sband->vht_cap.vht_mcs) ||
1056              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1057                          sband->vht_cap.cap)))
1058                 return -ENOBUFS;
1059
1060         /* add bitrates */
1061         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1062         if (!nl_rates)
1063                 return -ENOBUFS;
1064
1065         for (i = 0; i < sband->n_bitrates; i++) {
1066                 nl_rate = nla_nest_start(msg, i);
1067                 if (!nl_rate)
1068                         return -ENOBUFS;
1069
1070                 rate = &sband->bitrates[i];
1071                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1072                                 rate->bitrate))
1073                         return -ENOBUFS;
1074                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1075                     nla_put_flag(msg,
1076                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1077                         return -ENOBUFS;
1078
1079                 nla_nest_end(msg, nl_rate);
1080         }
1081
1082         nla_nest_end(msg, nl_rates);
1083
1084         return 0;
1085 }
1086
1087 static int
1088 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1089                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1090 {
1091         u16 stypes;
1092         struct nlattr *nl_ftypes, *nl_ifs;
1093         enum nl80211_iftype ift;
1094         int i;
1095
1096         if (!mgmt_stypes)
1097                 return 0;
1098
1099         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1100         if (!nl_ifs)
1101                 return -ENOBUFS;
1102
1103         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1104                 nl_ftypes = nla_nest_start(msg, ift);
1105                 if (!nl_ftypes)
1106                         return -ENOBUFS;
1107                 i = 0;
1108                 stypes = mgmt_stypes[ift].tx;
1109                 while (stypes) {
1110                         if ((stypes & 1) &&
1111                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1112                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1113                                 return -ENOBUFS;
1114                         stypes >>= 1;
1115                         i++;
1116                 }
1117                 nla_nest_end(msg, nl_ftypes);
1118         }
1119
1120         nla_nest_end(msg, nl_ifs);
1121
1122         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1123         if (!nl_ifs)
1124                 return -ENOBUFS;
1125
1126         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1127                 nl_ftypes = nla_nest_start(msg, ift);
1128                 if (!nl_ftypes)
1129                         return -ENOBUFS;
1130                 i = 0;
1131                 stypes = mgmt_stypes[ift].rx;
1132                 while (stypes) {
1133                         if ((stypes & 1) &&
1134                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1135                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1136                                 return -ENOBUFS;
1137                         stypes >>= 1;
1138                         i++;
1139                 }
1140                 nla_nest_end(msg, nl_ftypes);
1141         }
1142         nla_nest_end(msg, nl_ifs);
1143
1144         return 0;
1145 }
1146
1147 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1148                               struct sk_buff *msg, u32 portid, u32 seq,
1149                               int flags, bool split, long *split_start,
1150                               long *band_start, long *chan_start)
1151 {
1152         void *hdr;
1153         struct nlattr *nl_bands, *nl_band;
1154         struct nlattr *nl_freqs, *nl_freq;
1155         struct nlattr *nl_cmds;
1156         enum ieee80211_band band;
1157         struct ieee80211_channel *chan;
1158         int i;
1159         const struct ieee80211_txrx_stypes *mgmt_stypes =
1160                                 dev->wiphy.mgmt_stypes;
1161         long start = 0, start_chan = 0, start_band = 0;
1162         u32 features;
1163
1164         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1165         if (!hdr)
1166                 return -ENOBUFS;
1167
1168         /* allow always using the variables */
1169         if (!split) {
1170                 split_start = &start;
1171                 band_start = &start_band;
1172                 chan_start = &start_chan;
1173         }
1174
1175         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1176             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1177                            wiphy_name(&dev->wiphy)) ||
1178             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1179                         cfg80211_rdev_list_generation))
1180                 goto nla_put_failure;
1181
1182         switch (*split_start) {
1183         case 0:
1184                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1185                                dev->wiphy.retry_short) ||
1186                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1187                                dev->wiphy.retry_long) ||
1188                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1189                                 dev->wiphy.frag_threshold) ||
1190                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1191                                 dev->wiphy.rts_threshold) ||
1192                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1193                                dev->wiphy.coverage_class) ||
1194                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1195                                dev->wiphy.max_scan_ssids) ||
1196                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1197                                dev->wiphy.max_sched_scan_ssids) ||
1198                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1199                                 dev->wiphy.max_scan_ie_len) ||
1200                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1201                                 dev->wiphy.max_sched_scan_ie_len) ||
1202                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1203                                dev->wiphy.max_match_sets))
1204                         goto nla_put_failure;
1205
1206                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1207                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1208                         goto nla_put_failure;
1209                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1210                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1211                         goto nla_put_failure;
1212                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1213                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1214                         goto nla_put_failure;
1215                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1216                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1217                         goto nla_put_failure;
1218                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1219                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1220                         goto nla_put_failure;
1221                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1222                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1223                         goto nla_put_failure;
1224
1225                 (*split_start)++;
1226                 if (split)
1227                         break;
1228         case 1:
1229                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1230                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1231                             dev->wiphy.cipher_suites))
1232                         goto nla_put_failure;
1233
1234                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1235                                dev->wiphy.max_num_pmkids))
1236                         goto nla_put_failure;
1237
1238                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1239                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1240                         goto nla_put_failure;
1241
1242                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1243                                 dev->wiphy.available_antennas_tx) ||
1244                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1245                                 dev->wiphy.available_antennas_rx))
1246                         goto nla_put_failure;
1247
1248                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1249                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1250                                 dev->wiphy.probe_resp_offload))
1251                         goto nla_put_failure;
1252
1253                 if ((dev->wiphy.available_antennas_tx ||
1254                      dev->wiphy.available_antennas_rx) &&
1255                     dev->ops->get_antenna) {
1256                         u32 tx_ant = 0, rx_ant = 0;
1257                         int res;
1258                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1259                         if (!res) {
1260                                 if (nla_put_u32(msg,
1261                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1262                                                 tx_ant) ||
1263                                     nla_put_u32(msg,
1264                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1265                                                 rx_ant))
1266                                         goto nla_put_failure;
1267                         }
1268                 }
1269
1270                 (*split_start)++;
1271                 if (split)
1272                         break;
1273         case 2:
1274                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1275                                         dev->wiphy.interface_modes))
1276                                 goto nla_put_failure;
1277                 (*split_start)++;
1278                 if (split)
1279                         break;
1280         case 3:
1281                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1282                 if (!nl_bands)
1283                         goto nla_put_failure;
1284
1285                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1286                         struct ieee80211_supported_band *sband;
1287
1288                         sband = dev->wiphy.bands[band];
1289
1290                         if (!sband)
1291                                 continue;
1292
1293                         nl_band = nla_nest_start(msg, band);
1294                         if (!nl_band)
1295                                 goto nla_put_failure;
1296
1297                         switch (*chan_start) {
1298                         case 0:
1299                                 if (nl80211_send_band_rateinfo(msg, sband))
1300                                         goto nla_put_failure;
1301                                 (*chan_start)++;
1302                                 if (split)
1303                                         break;
1304                         default:
1305                                 /* add frequencies */
1306                                 nl_freqs = nla_nest_start(
1307                                         msg, NL80211_BAND_ATTR_FREQS);
1308                                 if (!nl_freqs)
1309                                         goto nla_put_failure;
1310
1311                                 for (i = *chan_start - 1;
1312                                      i < sband->n_channels;
1313                                      i++) {
1314                                         nl_freq = nla_nest_start(msg, i);
1315                                         if (!nl_freq)
1316                                                 goto nla_put_failure;
1317
1318                                         chan = &sband->channels[i];
1319
1320                                         if (nl80211_msg_put_channel(msg, chan,
1321                                                                     split))
1322                                                 goto nla_put_failure;
1323
1324                                         nla_nest_end(msg, nl_freq);
1325                                         if (split)
1326                                                 break;
1327                                 }
1328                                 if (i < sband->n_channels)
1329                                         *chan_start = i + 2;
1330                                 else
1331                                         *chan_start = 0;
1332                                 nla_nest_end(msg, nl_freqs);
1333                         }
1334
1335                         nla_nest_end(msg, nl_band);
1336
1337                         if (split) {
1338                                 /* start again here */
1339                                 if (*chan_start)
1340                                         band--;
1341                                 break;
1342                         }
1343                 }
1344                 nla_nest_end(msg, nl_bands);
1345
1346                 if (band < IEEE80211_NUM_BANDS)
1347                         *band_start = band + 1;
1348                 else
1349                         *band_start = 0;
1350
1351                 /* if bands & channels are done, continue outside */
1352                 if (*band_start == 0 && *chan_start == 0)
1353                         (*split_start)++;
1354                 if (split)
1355                         break;
1356         case 4:
1357                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1358                 if (!nl_cmds)
1359                         goto nla_put_failure;
1360
1361                 i = 0;
1362 #define CMD(op, n)                                                      \
1363                  do {                                                   \
1364                         if (dev->ops->op) {                             \
1365                                 i++;                                    \
1366                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1367                                         goto nla_put_failure;           \
1368                         }                                               \
1369                 } while (0)
1370
1371                 CMD(add_virtual_intf, NEW_INTERFACE);
1372                 CMD(change_virtual_intf, SET_INTERFACE);
1373                 CMD(add_key, NEW_KEY);
1374                 CMD(start_ap, START_AP);
1375                 CMD(add_station, NEW_STATION);
1376                 CMD(add_mpath, NEW_MPATH);
1377                 CMD(update_mesh_config, SET_MESH_CONFIG);
1378                 CMD(change_bss, SET_BSS);
1379                 CMD(auth, AUTHENTICATE);
1380                 CMD(assoc, ASSOCIATE);
1381                 CMD(deauth, DEAUTHENTICATE);
1382                 CMD(disassoc, DISASSOCIATE);
1383                 CMD(join_ibss, JOIN_IBSS);
1384                 CMD(join_mesh, JOIN_MESH);
1385                 CMD(set_pmksa, SET_PMKSA);
1386                 CMD(del_pmksa, DEL_PMKSA);
1387                 CMD(flush_pmksa, FLUSH_PMKSA);
1388                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1389                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1390                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1391                 CMD(mgmt_tx, FRAME);
1392                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1393                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1394                         i++;
1395                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1396                                 goto nla_put_failure;
1397                 }
1398                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1399                     dev->ops->join_mesh) {
1400                         i++;
1401                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1402                                 goto nla_put_failure;
1403                 }
1404                 CMD(set_wds_peer, SET_WDS_PEER);
1405                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1406                         CMD(tdls_mgmt, TDLS_MGMT);
1407                         CMD(tdls_oper, TDLS_OPER);
1408                 }
1409                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1410                         CMD(sched_scan_start, START_SCHED_SCAN);
1411                 CMD(probe_client, PROBE_CLIENT);
1412                 CMD(set_noack_map, SET_NOACK_MAP);
1413                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1414                         i++;
1415                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1416                                 goto nla_put_failure;
1417                 }
1418                 CMD(start_p2p_device, START_P2P_DEVICE);
1419                 CMD(set_mcast_rate, SET_MCAST_RATE);
1420
1421 #ifdef CONFIG_NL80211_TESTMODE
1422                 CMD(testmode_cmd, TESTMODE);
1423 #endif
1424
1425 #undef CMD
1426
1427                 if (dev->ops->connect || dev->ops->auth) {
1428                         i++;
1429                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1430                                 goto nla_put_failure;
1431                 }
1432
1433                 if (dev->ops->disconnect || dev->ops->deauth) {
1434                         i++;
1435                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1436                                 goto nla_put_failure;
1437                 }
1438
1439                 nla_nest_end(msg, nl_cmds);
1440                 (*split_start)++;
1441                 if (split)
1442                         break;
1443         case 5:
1444                 if (dev->ops->remain_on_channel &&
1445                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1446                     nla_put_u32(msg,
1447                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1448                                 dev->wiphy.max_remain_on_channel_duration))
1449                         goto nla_put_failure;
1450
1451                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1452                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1453                         goto nla_put_failure;
1454
1455                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1456                         goto nla_put_failure;
1457                 (*split_start)++;
1458                 if (split)
1459                         break;
1460         case 6:
1461 #ifdef CONFIG_PM
1462                 if (nl80211_send_wowlan(msg, dev, split))
1463                         goto nla_put_failure;
1464                 (*split_start)++;
1465                 if (split)
1466                         break;
1467 #else
1468                 (*split_start)++;
1469 #endif
1470         case 7:
1471                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1472                                         dev->wiphy.software_iftypes))
1473                         goto nla_put_failure;
1474
1475                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1476                         goto nla_put_failure;
1477
1478                 (*split_start)++;
1479                 if (split)
1480                         break;
1481         case 8:
1482                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1483                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1484                                 dev->wiphy.ap_sme_capa))
1485                         goto nla_put_failure;
1486
1487                 features = dev->wiphy.features;
1488                 /*
1489                  * We can only add the per-channel limit information if the
1490                  * dump is split, otherwise it makes it too big. Therefore
1491                  * only advertise it in that case.
1492                  */
1493                 if (split)
1494                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1495                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1496                         goto nla_put_failure;
1497
1498                 if (dev->wiphy.ht_capa_mod_mask &&
1499                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1500                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1501                             dev->wiphy.ht_capa_mod_mask))
1502                         goto nla_put_failure;
1503
1504                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1505                     dev->wiphy.max_acl_mac_addrs &&
1506                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1507                                 dev->wiphy.max_acl_mac_addrs))
1508                         goto nla_put_failure;
1509
1510                 /*
1511                  * Any information below this point is only available to
1512                  * applications that can deal with it being split. This
1513                  * helps ensure that newly added capabilities don't break
1514                  * older tools by overrunning their buffers.
1515                  *
1516                  * We still increment split_start so that in the split
1517                  * case we'll continue with more data in the next round,
1518                  * but break unconditionally so unsplit data stops here.
1519                  */
1520                 (*split_start)++;
1521                 break;
1522         case 9:
1523                 if (dev->wiphy.extended_capabilities &&
1524                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1525                              dev->wiphy.extended_capabilities_len,
1526                              dev->wiphy.extended_capabilities) ||
1527                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1528                              dev->wiphy.extended_capabilities_len,
1529                              dev->wiphy.extended_capabilities_mask)))
1530                         goto nla_put_failure;
1531
1532                 if (dev->wiphy.vht_capa_mod_mask &&
1533                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1534                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1535                             dev->wiphy.vht_capa_mod_mask))
1536                         goto nla_put_failure;
1537
1538                 /* done */
1539                 *split_start = 0;
1540                 break;
1541         }
1542         return genlmsg_end(msg, hdr);
1543
1544  nla_put_failure:
1545         genlmsg_cancel(msg, hdr);
1546         return -EMSGSIZE;
1547 }
1548
1549 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1550 {
1551         int idx = 0, ret;
1552         int start = cb->args[0];
1553         struct cfg80211_registered_device *dev;
1554         s64 filter_wiphy = -1;
1555         bool split = false;
1556         struct nlattr **tb = nl80211_fam.attrbuf;
1557         int res;
1558
1559         mutex_lock(&cfg80211_mutex);
1560         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1561                           tb, nl80211_fam.maxattr, nl80211_policy);
1562         if (res == 0) {
1563                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1564                 if (tb[NL80211_ATTR_WIPHY])
1565                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1566                 if (tb[NL80211_ATTR_WDEV])
1567                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1568                 if (tb[NL80211_ATTR_IFINDEX]) {
1569                         struct net_device *netdev;
1570                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1571
1572                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1573                         if (!netdev) {
1574                                 mutex_unlock(&cfg80211_mutex);
1575                                 return -ENODEV;
1576                         }
1577                         if (netdev->ieee80211_ptr) {
1578                                 dev = wiphy_to_dev(
1579                                         netdev->ieee80211_ptr->wiphy);
1580                                 filter_wiphy = dev->wiphy_idx;
1581                         }
1582                         dev_put(netdev);
1583                 }
1584         }
1585
1586         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1587                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1588                         continue;
1589                 if (++idx <= start)
1590                         continue;
1591                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1592                         continue;
1593                 /* attempt to fit multiple wiphy data chunks into the skb */
1594                 do {
1595                         ret = nl80211_send_wiphy(dev, skb,
1596                                                  NETLINK_CB(cb->skb).portid,
1597                                                  cb->nlh->nlmsg_seq,
1598                                                  NLM_F_MULTI,
1599                                                  split, &cb->args[1],
1600                                                  &cb->args[2],
1601                                                  &cb->args[3]);
1602                         if (ret < 0) {
1603                                 /*
1604                                  * If sending the wiphy data didn't fit (ENOBUFS
1605                                  * or EMSGSIZE returned), this SKB is still
1606                                  * empty (so it's not too big because another
1607                                  * wiphy dataset is already in the skb) and
1608                                  * we've not tried to adjust the dump allocation
1609                                  * yet ... then adjust the alloc size to be
1610                                  * bigger, and return 1 but with the empty skb.
1611                                  * This results in an empty message being RX'ed
1612                                  * in userspace, but that is ignored.
1613                                  *
1614                                  * We can then retry with the larger buffer.
1615                                  */
1616                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1617                                     !skb->len &&
1618                                     cb->min_dump_alloc < 4096) {
1619                                         cb->min_dump_alloc = 4096;
1620                                         mutex_unlock(&cfg80211_mutex);
1621                                         return 1;
1622                                 }
1623                                 idx--;
1624                                 break;
1625                         }
1626                 } while (cb->args[1] > 0);
1627                 break;
1628         }
1629         mutex_unlock(&cfg80211_mutex);
1630
1631         cb->args[0] = idx;
1632
1633         return skb->len;
1634 }
1635
1636 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1637 {
1638         struct sk_buff *msg;
1639         struct cfg80211_registered_device *dev = info->user_ptr[0];
1640
1641         msg = nlmsg_new(4096, GFP_KERNEL);
1642         if (!msg)
1643                 return -ENOMEM;
1644
1645         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1646                                false, NULL, NULL, NULL) < 0) {
1647                 nlmsg_free(msg);
1648                 return -ENOBUFS;
1649         }
1650
1651         return genlmsg_reply(msg, info);
1652 }
1653
1654 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1655         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1656         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1657         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1658         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1659         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1660 };
1661
1662 static int parse_txq_params(struct nlattr *tb[],
1663                             struct ieee80211_txq_params *txq_params)
1664 {
1665         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1666             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1667             !tb[NL80211_TXQ_ATTR_AIFS])
1668                 return -EINVAL;
1669
1670         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1671         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1672         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1673         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1674         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1675
1676         if (txq_params->ac >= NL80211_NUM_ACS)
1677                 return -EINVAL;
1678
1679         return 0;
1680 }
1681
1682 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1683 {
1684         /*
1685          * You can only set the channel explicitly for WDS interfaces,
1686          * all others have their channel managed via their respective
1687          * "establish a connection" command (connect, join, ...)
1688          *
1689          * For AP/GO and mesh mode, the channel can be set with the
1690          * channel userspace API, but is only stored and passed to the
1691          * low-level driver when the AP starts or the mesh is joined.
1692          * This is for backward compatibility, userspace can also give
1693          * the channel in the start-ap or join-mesh commands instead.
1694          *
1695          * Monitors are special as they are normally slaved to
1696          * whatever else is going on, so they have their own special
1697          * operation to set the monitor channel if possible.
1698          */
1699         return !wdev ||
1700                 wdev->iftype == NL80211_IFTYPE_AP ||
1701                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1702                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1703                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1704 }
1705
1706 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1707                                  struct genl_info *info,
1708                                  struct cfg80211_chan_def *chandef)
1709 {
1710         u32 control_freq;
1711
1712         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1713                 return -EINVAL;
1714
1715         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1716
1717         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1718         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1719         chandef->center_freq1 = control_freq;
1720         chandef->center_freq2 = 0;
1721
1722         /* Primary channel not allowed */
1723         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1724                 return -EINVAL;
1725
1726         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1727                 enum nl80211_channel_type chantype;
1728
1729                 chantype = nla_get_u32(
1730                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1731
1732                 switch (chantype) {
1733                 case NL80211_CHAN_NO_HT:
1734                 case NL80211_CHAN_HT20:
1735                 case NL80211_CHAN_HT40PLUS:
1736                 case NL80211_CHAN_HT40MINUS:
1737                         cfg80211_chandef_create(chandef, chandef->chan,
1738                                                 chantype);
1739                         break;
1740                 default:
1741                         return -EINVAL;
1742                 }
1743         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1744                 chandef->width =
1745                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1746                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1747                         chandef->center_freq1 =
1748                                 nla_get_u32(
1749                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1750                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1751                         chandef->center_freq2 =
1752                                 nla_get_u32(
1753                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1754         }
1755
1756         if (!cfg80211_chandef_valid(chandef))
1757                 return -EINVAL;
1758
1759         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1760                                      IEEE80211_CHAN_DISABLED))
1761                 return -EINVAL;
1762
1763         return 0;
1764 }
1765
1766 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1767                                  struct wireless_dev *wdev,
1768                                  struct genl_info *info)
1769 {
1770         struct cfg80211_chan_def chandef;
1771         int result;
1772         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1773
1774         if (wdev)
1775                 iftype = wdev->iftype;
1776
1777         if (!nl80211_can_set_dev_channel(wdev))
1778                 return -EOPNOTSUPP;
1779
1780         result = nl80211_parse_chandef(rdev, info, &chandef);
1781         if (result)
1782                 return result;
1783
1784         mutex_lock(&rdev->devlist_mtx);
1785         switch (iftype) {
1786         case NL80211_IFTYPE_AP:
1787         case NL80211_IFTYPE_P2P_GO:
1788                 if (wdev->beacon_interval) {
1789                         result = -EBUSY;
1790                         break;
1791                 }
1792                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1793                         result = -EINVAL;
1794                         break;
1795                 }
1796                 wdev->preset_chandef = chandef;
1797                 result = 0;
1798                 break;
1799         case NL80211_IFTYPE_MESH_POINT:
1800                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1801                 break;
1802         case NL80211_IFTYPE_MONITOR:
1803                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1804                 break;
1805         default:
1806                 result = -EINVAL;
1807         }
1808         mutex_unlock(&rdev->devlist_mtx);
1809
1810         return result;
1811 }
1812
1813 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1814 {
1815         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1816         struct net_device *netdev = info->user_ptr[1];
1817
1818         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1819 }
1820
1821 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1822 {
1823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1824         struct net_device *dev = info->user_ptr[1];
1825         struct wireless_dev *wdev = dev->ieee80211_ptr;
1826         const u8 *bssid;
1827
1828         if (!info->attrs[NL80211_ATTR_MAC])
1829                 return -EINVAL;
1830
1831         if (netif_running(dev))
1832                 return -EBUSY;
1833
1834         if (!rdev->ops->set_wds_peer)
1835                 return -EOPNOTSUPP;
1836
1837         if (wdev->iftype != NL80211_IFTYPE_WDS)
1838                 return -EOPNOTSUPP;
1839
1840         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1841         return rdev_set_wds_peer(rdev, dev, bssid);
1842 }
1843
1844
1845 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1846 {
1847         struct cfg80211_registered_device *rdev;
1848         struct net_device *netdev = NULL;
1849         struct wireless_dev *wdev;
1850         int result = 0, rem_txq_params = 0;
1851         struct nlattr *nl_txq_params;
1852         u32 changed;
1853         u8 retry_short = 0, retry_long = 0;
1854         u32 frag_threshold = 0, rts_threshold = 0;
1855         u8 coverage_class = 0;
1856
1857         /*
1858          * Try to find the wiphy and netdev. Normally this
1859          * function shouldn't need the netdev, but this is
1860          * done for backward compatibility -- previously
1861          * setting the channel was done per wiphy, but now
1862          * it is per netdev. Previous userland like hostapd
1863          * also passed a netdev to set_wiphy, so that it is
1864          * possible to let that go to the right netdev!
1865          */
1866         mutex_lock(&cfg80211_mutex);
1867
1868         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1869                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1870
1871                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1872                 if (netdev && netdev->ieee80211_ptr) {
1873                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1874                         mutex_lock(&rdev->mtx);
1875                 } else
1876                         netdev = NULL;
1877         }
1878
1879         if (!netdev) {
1880                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1881                                                   info->attrs);
1882                 if (IS_ERR(rdev)) {
1883                         mutex_unlock(&cfg80211_mutex);
1884                         return PTR_ERR(rdev);
1885                 }
1886                 wdev = NULL;
1887                 netdev = NULL;
1888                 result = 0;
1889
1890                 mutex_lock(&rdev->mtx);
1891         } else
1892                 wdev = netdev->ieee80211_ptr;
1893
1894         /*
1895          * end workaround code, by now the rdev is available
1896          * and locked, and wdev may or may not be NULL.
1897          */
1898
1899         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1900                 result = cfg80211_dev_rename(
1901                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1902
1903         mutex_unlock(&cfg80211_mutex);
1904
1905         if (result)
1906                 goto bad_res;
1907
1908         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1909                 struct ieee80211_txq_params txq_params;
1910                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1911
1912                 if (!rdev->ops->set_txq_params) {
1913                         result = -EOPNOTSUPP;
1914                         goto bad_res;
1915                 }
1916
1917                 if (!netdev) {
1918                         result = -EINVAL;
1919                         goto bad_res;
1920                 }
1921
1922                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1923                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1924                         result = -EINVAL;
1925                         goto bad_res;
1926                 }
1927
1928                 if (!netif_running(netdev)) {
1929                         result = -ENETDOWN;
1930                         goto bad_res;
1931                 }
1932
1933                 nla_for_each_nested(nl_txq_params,
1934                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1935                                     rem_txq_params) {
1936                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1937                                   nla_data(nl_txq_params),
1938                                   nla_len(nl_txq_params),
1939                                   txq_params_policy);
1940                         result = parse_txq_params(tb, &txq_params);
1941                         if (result)
1942                                 goto bad_res;
1943
1944                         result = rdev_set_txq_params(rdev, netdev,
1945                                                      &txq_params);
1946                         if (result)
1947                                 goto bad_res;
1948                 }
1949         }
1950
1951         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1952                 result = __nl80211_set_channel(rdev,
1953                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1954                                 info);
1955                 if (result)
1956                         goto bad_res;
1957         }
1958
1959         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1960                 struct wireless_dev *txp_wdev = wdev;
1961                 enum nl80211_tx_power_setting type;
1962                 int idx, mbm = 0;
1963
1964                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1965                         txp_wdev = NULL;
1966
1967                 if (!rdev->ops->set_tx_power) {
1968                         result = -EOPNOTSUPP;
1969                         goto bad_res;
1970                 }
1971
1972                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1973                 type = nla_get_u32(info->attrs[idx]);
1974
1975                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1976                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1977                         result = -EINVAL;
1978                         goto bad_res;
1979                 }
1980
1981                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1982                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1983                         mbm = nla_get_u32(info->attrs[idx]);
1984                 }
1985
1986                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1987                 if (result)
1988                         goto bad_res;
1989         }
1990
1991         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1992             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1993                 u32 tx_ant, rx_ant;
1994                 if ((!rdev->wiphy.available_antennas_tx &&
1995                      !rdev->wiphy.available_antennas_rx) ||
1996                     !rdev->ops->set_antenna) {
1997                         result = -EOPNOTSUPP;
1998                         goto bad_res;
1999                 }
2000
2001                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2002                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2003
2004                 /* reject antenna configurations which don't match the
2005                  * available antenna masks, except for the "all" mask */
2006                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2007                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2008                         result = -EINVAL;
2009                         goto bad_res;
2010                 }
2011
2012                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2013                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2014
2015                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2016                 if (result)
2017                         goto bad_res;
2018         }
2019
2020         changed = 0;
2021
2022         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2023                 retry_short = nla_get_u8(
2024                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2025                 if (retry_short == 0) {
2026                         result = -EINVAL;
2027                         goto bad_res;
2028                 }
2029                 changed |= WIPHY_PARAM_RETRY_SHORT;
2030         }
2031
2032         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2033                 retry_long = nla_get_u8(
2034                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2035                 if (retry_long == 0) {
2036                         result = -EINVAL;
2037                         goto bad_res;
2038                 }
2039                 changed |= WIPHY_PARAM_RETRY_LONG;
2040         }
2041
2042         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2043                 frag_threshold = nla_get_u32(
2044                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2045                 if (frag_threshold < 256) {
2046                         result = -EINVAL;
2047                         goto bad_res;
2048                 }
2049                 if (frag_threshold != (u32) -1) {
2050                         /*
2051                          * Fragments (apart from the last one) are required to
2052                          * have even length. Make the fragmentation code
2053                          * simpler by stripping LSB should someone try to use
2054                          * odd threshold value.
2055                          */
2056                         frag_threshold &= ~0x1;
2057                 }
2058                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2059         }
2060
2061         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2062                 rts_threshold = nla_get_u32(
2063                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2064                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2065         }
2066
2067         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2068                 coverage_class = nla_get_u8(
2069                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2070                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2071         }
2072
2073         if (changed) {
2074                 u8 old_retry_short, old_retry_long;
2075                 u32 old_frag_threshold, old_rts_threshold;
2076                 u8 old_coverage_class;
2077
2078                 if (!rdev->ops->set_wiphy_params) {
2079                         result = -EOPNOTSUPP;
2080                         goto bad_res;
2081                 }
2082
2083                 old_retry_short = rdev->wiphy.retry_short;
2084                 old_retry_long = rdev->wiphy.retry_long;
2085                 old_frag_threshold = rdev->wiphy.frag_threshold;
2086                 old_rts_threshold = rdev->wiphy.rts_threshold;
2087                 old_coverage_class = rdev->wiphy.coverage_class;
2088
2089                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2090                         rdev->wiphy.retry_short = retry_short;
2091                 if (changed & WIPHY_PARAM_RETRY_LONG)
2092                         rdev->wiphy.retry_long = retry_long;
2093                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2094                         rdev->wiphy.frag_threshold = frag_threshold;
2095                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2096                         rdev->wiphy.rts_threshold = rts_threshold;
2097                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2098                         rdev->wiphy.coverage_class = coverage_class;
2099
2100                 result = rdev_set_wiphy_params(rdev, changed);
2101                 if (result) {
2102                         rdev->wiphy.retry_short = old_retry_short;
2103                         rdev->wiphy.retry_long = old_retry_long;
2104                         rdev->wiphy.frag_threshold = old_frag_threshold;
2105                         rdev->wiphy.rts_threshold = old_rts_threshold;
2106                         rdev->wiphy.coverage_class = old_coverage_class;
2107                 }
2108         }
2109
2110  bad_res:
2111         mutex_unlock(&rdev->mtx);
2112         if (netdev)
2113                 dev_put(netdev);
2114         return result;
2115 }
2116
2117 static inline u64 wdev_id(struct wireless_dev *wdev)
2118 {
2119         return (u64)wdev->identifier |
2120                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2121 }
2122
2123 static int nl80211_send_chandef(struct sk_buff *msg,
2124                                  struct cfg80211_chan_def *chandef)
2125 {
2126         WARN_ON(!cfg80211_chandef_valid(chandef));
2127
2128         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2129                         chandef->chan->center_freq))
2130                 return -ENOBUFS;
2131         switch (chandef->width) {
2132         case NL80211_CHAN_WIDTH_20_NOHT:
2133         case NL80211_CHAN_WIDTH_20:
2134         case NL80211_CHAN_WIDTH_40:
2135                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2136                                 cfg80211_get_chandef_type(chandef)))
2137                         return -ENOBUFS;
2138                 break;
2139         default:
2140                 break;
2141         }
2142         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2143                 return -ENOBUFS;
2144         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2145                 return -ENOBUFS;
2146         if (chandef->center_freq2 &&
2147             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2148                 return -ENOBUFS;
2149         return 0;
2150 }
2151
2152 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2153                               struct cfg80211_registered_device *rdev,
2154                               struct wireless_dev *wdev)
2155 {
2156         struct net_device *dev = wdev->netdev;
2157         void *hdr;
2158
2159         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2160         if (!hdr)
2161                 return -1;
2162
2163         if (dev &&
2164             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2165              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2166                 goto nla_put_failure;
2167
2168         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2169             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2170             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2171             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2172             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2173                         rdev->devlist_generation ^
2174                         (cfg80211_rdev_list_generation << 2)))
2175                 goto nla_put_failure;
2176
2177         if (rdev->ops->get_channel) {
2178                 int ret;
2179                 struct cfg80211_chan_def chandef;
2180
2181                 ret = rdev_get_channel(rdev, wdev, &chandef);
2182                 if (ret == 0) {
2183                         if (nl80211_send_chandef(msg, &chandef))
2184                                 goto nla_put_failure;
2185                 }
2186         }
2187
2188         if (wdev->ssid_len) {
2189                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2190                         goto nla_put_failure;
2191         }
2192
2193         return genlmsg_end(msg, hdr);
2194
2195  nla_put_failure:
2196         genlmsg_cancel(msg, hdr);
2197         return -EMSGSIZE;
2198 }
2199
2200 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2201 {
2202         int wp_idx = 0;
2203         int if_idx = 0;
2204         int wp_start = cb->args[0];
2205         int if_start = cb->args[1];
2206         struct cfg80211_registered_device *rdev;
2207         struct wireless_dev *wdev;
2208
2209         mutex_lock(&cfg80211_mutex);
2210         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2211                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2212                         continue;
2213                 if (wp_idx < wp_start) {
2214                         wp_idx++;
2215                         continue;
2216                 }
2217                 if_idx = 0;
2218
2219                 mutex_lock(&rdev->devlist_mtx);
2220                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2221                         if (if_idx < if_start) {
2222                                 if_idx++;
2223                                 continue;
2224                         }
2225                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2226                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2227                                                rdev, wdev) < 0) {
2228                                 mutex_unlock(&rdev->devlist_mtx);
2229                                 goto out;
2230                         }
2231                         if_idx++;
2232                 }
2233                 mutex_unlock(&rdev->devlist_mtx);
2234
2235                 wp_idx++;
2236         }
2237  out:
2238         mutex_unlock(&cfg80211_mutex);
2239
2240         cb->args[0] = wp_idx;
2241         cb->args[1] = if_idx;
2242
2243         return skb->len;
2244 }
2245
2246 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2247 {
2248         struct sk_buff *msg;
2249         struct cfg80211_registered_device *dev = info->user_ptr[0];
2250         struct wireless_dev *wdev = info->user_ptr[1];
2251
2252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2253         if (!msg)
2254                 return -ENOMEM;
2255
2256         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2257                                dev, wdev) < 0) {
2258                 nlmsg_free(msg);
2259                 return -ENOBUFS;
2260         }
2261
2262         return genlmsg_reply(msg, info);
2263 }
2264
2265 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2266         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2267         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2268         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2269         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2270         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2271 };
2272
2273 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2274 {
2275         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2276         int flag;
2277
2278         *mntrflags = 0;
2279
2280         if (!nla)
2281                 return -EINVAL;
2282
2283         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2284                              nla, mntr_flags_policy))
2285                 return -EINVAL;
2286
2287         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2288                 if (flags[flag])
2289                         *mntrflags |= (1<<flag);
2290
2291         return 0;
2292 }
2293
2294 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2295                                struct net_device *netdev, u8 use_4addr,
2296                                enum nl80211_iftype iftype)
2297 {
2298         if (!use_4addr) {
2299                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2300                         return -EBUSY;
2301                 return 0;
2302         }
2303
2304         switch (iftype) {
2305         case NL80211_IFTYPE_AP_VLAN:
2306                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2307                         return 0;
2308                 break;
2309         case NL80211_IFTYPE_STATION:
2310                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2311                         return 0;
2312                 break;
2313         default:
2314                 break;
2315         }
2316
2317         return -EOPNOTSUPP;
2318 }
2319
2320 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2321 {
2322         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2323         struct vif_params params;
2324         int err;
2325         enum nl80211_iftype otype, ntype;
2326         struct net_device *dev = info->user_ptr[1];
2327         u32 _flags, *flags = NULL;
2328         bool change = false;
2329
2330         memset(&params, 0, sizeof(params));
2331
2332         otype = ntype = dev->ieee80211_ptr->iftype;
2333
2334         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2335                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2336                 if (otype != ntype)
2337                         change = true;
2338                 if (ntype > NL80211_IFTYPE_MAX)
2339                         return -EINVAL;
2340         }
2341
2342         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2343                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2344
2345                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2346                         return -EINVAL;
2347                 if (netif_running(dev))
2348                         return -EBUSY;
2349
2350                 wdev_lock(wdev);
2351                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2352                              IEEE80211_MAX_MESH_ID_LEN);
2353                 wdev->mesh_id_up_len =
2354                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2355                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2356                        wdev->mesh_id_up_len);
2357                 wdev_unlock(wdev);
2358         }
2359
2360         if (info->attrs[NL80211_ATTR_4ADDR]) {
2361                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2362                 change = true;
2363                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2364                 if (err)
2365                         return err;
2366         } else {
2367                 params.use_4addr = -1;
2368         }
2369
2370         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2371                 if (ntype != NL80211_IFTYPE_MONITOR)
2372                         return -EINVAL;
2373                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2374                                           &_flags);
2375                 if (err)
2376                         return err;
2377
2378                 flags = &_flags;
2379                 change = true;
2380         }
2381
2382         if (change)
2383                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2384         else
2385                 err = 0;
2386
2387         if (!err && params.use_4addr != -1)
2388                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2389
2390         return err;
2391 }
2392
2393 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2394 {
2395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2396         struct vif_params params;
2397         struct wireless_dev *wdev;
2398         struct sk_buff *msg;
2399         int err;
2400         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2401         u32 flags;
2402
2403         memset(&params, 0, sizeof(params));
2404
2405         if (!info->attrs[NL80211_ATTR_IFNAME])
2406                 return -EINVAL;
2407
2408         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2409                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2410                 if (type > NL80211_IFTYPE_MAX)
2411                         return -EINVAL;
2412         }
2413
2414         if (!rdev->ops->add_virtual_intf ||
2415             !(rdev->wiphy.interface_modes & (1 << type)))
2416                 return -EOPNOTSUPP;
2417
2418         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2419                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2420                            ETH_ALEN);
2421                 if (!is_valid_ether_addr(params.macaddr))
2422                         return -EADDRNOTAVAIL;
2423         }
2424
2425         if (info->attrs[NL80211_ATTR_4ADDR]) {
2426                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2427                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2428                 if (err)
2429                         return err;
2430         }
2431
2432         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2433         if (!msg)
2434                 return -ENOMEM;
2435
2436         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2437                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2438                                   &flags);
2439         wdev = rdev_add_virtual_intf(rdev,
2440                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2441                                 type, err ? NULL : &flags, &params);
2442         if (IS_ERR(wdev)) {
2443                 nlmsg_free(msg);
2444                 return PTR_ERR(wdev);
2445         }
2446
2447         switch (type) {
2448         case NL80211_IFTYPE_MESH_POINT:
2449                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2450                         break;
2451                 wdev_lock(wdev);
2452                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2453                              IEEE80211_MAX_MESH_ID_LEN);
2454                 wdev->mesh_id_up_len =
2455                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2456                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2457                        wdev->mesh_id_up_len);
2458                 wdev_unlock(wdev);
2459                 break;
2460         case NL80211_IFTYPE_P2P_DEVICE:
2461                 /*
2462                  * P2P Device doesn't have a netdev, so doesn't go
2463                  * through the netdev notifier and must be added here
2464                  */
2465                 mutex_init(&wdev->mtx);
2466                 INIT_LIST_HEAD(&wdev->event_list);
2467                 spin_lock_init(&wdev->event_lock);
2468                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2469                 spin_lock_init(&wdev->mgmt_registrations_lock);
2470
2471                 mutex_lock(&rdev->devlist_mtx);
2472                 wdev->identifier = ++rdev->wdev_id;
2473                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2474                 rdev->devlist_generation++;
2475                 mutex_unlock(&rdev->devlist_mtx);
2476                 break;
2477         default:
2478                 break;
2479         }
2480
2481         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2482                                rdev, wdev) < 0) {
2483                 nlmsg_free(msg);
2484                 return -ENOBUFS;
2485         }
2486
2487         return genlmsg_reply(msg, info);
2488 }
2489
2490 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2491 {
2492         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2493         struct wireless_dev *wdev = info->user_ptr[1];
2494
2495         if (!rdev->ops->del_virtual_intf)
2496                 return -EOPNOTSUPP;
2497
2498         /*
2499          * If we remove a wireless device without a netdev then clear
2500          * user_ptr[1] so that nl80211_post_doit won't dereference it
2501          * to check if it needs to do dev_put(). Otherwise it crashes
2502          * since the wdev has been freed, unlike with a netdev where
2503          * we need the dev_put() for the netdev to really be freed.
2504          */
2505         if (!wdev->netdev)
2506                 info->user_ptr[1] = NULL;
2507
2508         return rdev_del_virtual_intf(rdev, wdev);
2509 }
2510
2511 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2512 {
2513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2514         struct net_device *dev = info->user_ptr[1];
2515         u16 noack_map;
2516
2517         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2518                 return -EINVAL;
2519
2520         if (!rdev->ops->set_noack_map)
2521                 return -EOPNOTSUPP;
2522
2523         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2524
2525         return rdev_set_noack_map(rdev, dev, noack_map);
2526 }
2527
2528 struct get_key_cookie {
2529         struct sk_buff *msg;
2530         int error;
2531         int idx;
2532 };
2533
2534 static void get_key_callback(void *c, struct key_params *params)
2535 {
2536         struct nlattr *key;
2537         struct get_key_cookie *cookie = c;
2538
2539         if ((params->key &&
2540              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2541                      params->key_len, params->key)) ||
2542             (params->seq &&
2543              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2544                      params->seq_len, params->seq)) ||
2545             (params->cipher &&
2546              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2547                          params->cipher)))
2548                 goto nla_put_failure;
2549
2550         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2551         if (!key)
2552                 goto nla_put_failure;
2553
2554         if ((params->key &&
2555              nla_put(cookie->msg, NL80211_KEY_DATA,
2556                      params->key_len, params->key)) ||
2557             (params->seq &&
2558              nla_put(cookie->msg, NL80211_KEY_SEQ,
2559                      params->seq_len, params->seq)) ||
2560             (params->cipher &&
2561              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2562                          params->cipher)))
2563                 goto nla_put_failure;
2564
2565         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2566                 goto nla_put_failure;
2567
2568         nla_nest_end(cookie->msg, key);
2569
2570         return;
2571  nla_put_failure:
2572         cookie->error = 1;
2573 }
2574
2575 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2576 {
2577         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2578         int err;
2579         struct net_device *dev = info->user_ptr[1];
2580         u8 key_idx = 0;
2581         const u8 *mac_addr = NULL;
2582         bool pairwise;
2583         struct get_key_cookie cookie = {
2584                 .error = 0,
2585         };
2586         void *hdr;
2587         struct sk_buff *msg;
2588
2589         if (info->attrs[NL80211_ATTR_KEY_IDX])
2590                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2591
2592         if (key_idx > 5)
2593                 return -EINVAL;
2594
2595         if (info->attrs[NL80211_ATTR_MAC])
2596                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2597
2598         pairwise = !!mac_addr;
2599         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2600                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2601                 if (kt >= NUM_NL80211_KEYTYPES)
2602                         return -EINVAL;
2603                 if (kt != NL80211_KEYTYPE_GROUP &&
2604                     kt != NL80211_KEYTYPE_PAIRWISE)
2605                         return -EINVAL;
2606                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2607         }
2608
2609         if (!rdev->ops->get_key)
2610                 return -EOPNOTSUPP;
2611
2612         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2613         if (!msg)
2614                 return -ENOMEM;
2615
2616         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2617                              NL80211_CMD_NEW_KEY);
2618         if (IS_ERR(hdr))
2619                 return PTR_ERR(hdr);
2620
2621         cookie.msg = msg;
2622         cookie.idx = key_idx;
2623
2624         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2625             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2626                 goto nla_put_failure;
2627         if (mac_addr &&
2628             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2629                 goto nla_put_failure;
2630
2631         if (pairwise && mac_addr &&
2632             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2633                 return -ENOENT;
2634
2635         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2636                            get_key_callback);
2637
2638         if (err)
2639                 goto free_msg;
2640
2641         if (cookie.error)
2642                 goto nla_put_failure;
2643
2644         genlmsg_end(msg, hdr);
2645         return genlmsg_reply(msg, info);
2646
2647  nla_put_failure:
2648         err = -ENOBUFS;
2649  free_msg:
2650         nlmsg_free(msg);
2651         return err;
2652 }
2653
2654 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2655 {
2656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2657         struct key_parse key;
2658         int err;
2659         struct net_device *dev = info->user_ptr[1];
2660
2661         err = nl80211_parse_key(info, &key);
2662         if (err)
2663                 return err;
2664
2665         if (key.idx < 0)
2666                 return -EINVAL;
2667
2668         /* only support setting default key */
2669         if (!key.def && !key.defmgmt)
2670                 return -EINVAL;
2671
2672         wdev_lock(dev->ieee80211_ptr);
2673
2674         if (key.def) {
2675                 if (!rdev->ops->set_default_key) {
2676                         err = -EOPNOTSUPP;
2677                         goto out;
2678                 }
2679
2680                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2681                 if (err)
2682                         goto out;
2683
2684                 err = rdev_set_default_key(rdev, dev, key.idx,
2685                                                  key.def_uni, key.def_multi);
2686
2687                 if (err)
2688                         goto out;
2689
2690 #ifdef CONFIG_CFG80211_WEXT
2691                 dev->ieee80211_ptr->wext.default_key = key.idx;
2692 #endif
2693         } else {
2694                 if (key.def_uni || !key.def_multi) {
2695                         err = -EINVAL;
2696                         goto out;
2697                 }
2698
2699                 if (!rdev->ops->set_default_mgmt_key) {
2700                         err = -EOPNOTSUPP;
2701                         goto out;
2702                 }
2703
2704                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2705                 if (err)
2706                         goto out;
2707
2708                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2709                 if (err)
2710                         goto out;
2711
2712 #ifdef CONFIG_CFG80211_WEXT
2713                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2714 #endif
2715         }
2716
2717  out:
2718         wdev_unlock(dev->ieee80211_ptr);
2719
2720         return err;
2721 }
2722
2723 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2724 {
2725         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2726         int err;
2727         struct net_device *dev = info->user_ptr[1];
2728         struct key_parse key;
2729         const u8 *mac_addr = NULL;
2730
2731         err = nl80211_parse_key(info, &key);
2732         if (err)
2733                 return err;
2734
2735         if (!key.p.key)
2736                 return -EINVAL;
2737
2738         if (info->attrs[NL80211_ATTR_MAC])
2739                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2740
2741         if (key.type == -1) {
2742                 if (mac_addr)
2743                         key.type = NL80211_KEYTYPE_PAIRWISE;
2744                 else
2745                         key.type = NL80211_KEYTYPE_GROUP;
2746         }
2747
2748         /* for now */
2749         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2750             key.type != NL80211_KEYTYPE_GROUP)
2751                 return -EINVAL;
2752
2753         if (!rdev->ops->add_key)
2754                 return -EOPNOTSUPP;
2755
2756         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2757                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2758                                            mac_addr))
2759                 return -EINVAL;
2760
2761         wdev_lock(dev->ieee80211_ptr);
2762         err = nl80211_key_allowed(dev->ieee80211_ptr);
2763         if (!err)
2764                 err = rdev_add_key(rdev, dev, key.idx,
2765                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2766                                     mac_addr, &key.p);
2767         wdev_unlock(dev->ieee80211_ptr);
2768
2769         return err;
2770 }
2771
2772 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2773 {
2774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2775         int err;
2776         struct net_device *dev = info->user_ptr[1];
2777         u8 *mac_addr = NULL;
2778         struct key_parse key;
2779
2780         err = nl80211_parse_key(info, &key);
2781         if (err)
2782                 return err;
2783
2784         if (info->attrs[NL80211_ATTR_MAC])
2785                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2786
2787         if (key.type == -1) {
2788                 if (mac_addr)
2789                         key.type = NL80211_KEYTYPE_PAIRWISE;
2790                 else
2791                         key.type = NL80211_KEYTYPE_GROUP;
2792         }
2793
2794         /* for now */
2795         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2796             key.type != NL80211_KEYTYPE_GROUP)
2797                 return -EINVAL;
2798
2799         if (!rdev->ops->del_key)
2800                 return -EOPNOTSUPP;
2801
2802         wdev_lock(dev->ieee80211_ptr);
2803         err = nl80211_key_allowed(dev->ieee80211_ptr);
2804
2805         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2806             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2807                 err = -ENOENT;
2808
2809         if (!err)
2810                 err = rdev_del_key(rdev, dev, key.idx,
2811                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2812                                    mac_addr);
2813
2814 #ifdef CONFIG_CFG80211_WEXT
2815         if (!err) {
2816                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2817                         dev->ieee80211_ptr->wext.default_key = -1;
2818                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2819                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2820         }
2821 #endif
2822         wdev_unlock(dev->ieee80211_ptr);
2823
2824         return err;
2825 }
2826
2827 /* This function returns an error or the number of nested attributes */
2828 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2829 {
2830         struct nlattr *attr;
2831         int n_entries = 0, tmp;
2832
2833         nla_for_each_nested(attr, nl_attr, tmp) {
2834                 if (nla_len(attr) != ETH_ALEN)
2835                         return -EINVAL;
2836
2837                 n_entries++;
2838         }
2839
2840         return n_entries;
2841 }
2842
2843 /*
2844  * This function parses ACL information and allocates memory for ACL data.
2845  * On successful return, the calling function is responsible to free the
2846  * ACL buffer returned by this function.
2847  */
2848 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2849                                                 struct genl_info *info)
2850 {
2851         enum nl80211_acl_policy acl_policy;
2852         struct nlattr *attr;
2853         struct cfg80211_acl_data *acl;
2854         int i = 0, n_entries, tmp;
2855
2856         if (!wiphy->max_acl_mac_addrs)
2857                 return ERR_PTR(-EOPNOTSUPP);
2858
2859         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2860                 return ERR_PTR(-EINVAL);
2861
2862         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2863         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2864             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2865                 return ERR_PTR(-EINVAL);
2866
2867         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2868                 return ERR_PTR(-EINVAL);
2869
2870         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2871         if (n_entries < 0)
2872                 return ERR_PTR(n_entries);
2873
2874         if (n_entries > wiphy->max_acl_mac_addrs)
2875                 return ERR_PTR(-ENOTSUPP);
2876
2877         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2878                       GFP_KERNEL);
2879         if (!acl)
2880                 return ERR_PTR(-ENOMEM);
2881
2882         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2883                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2884                 i++;
2885         }
2886
2887         acl->n_acl_entries = n_entries;
2888         acl->acl_policy = acl_policy;
2889
2890         return acl;
2891 }
2892
2893 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2894 {
2895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2896         struct net_device *dev = info->user_ptr[1];
2897         struct cfg80211_acl_data *acl;
2898         int err;
2899
2900         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2901             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2902                 return -EOPNOTSUPP;
2903
2904         if (!dev->ieee80211_ptr->beacon_interval)
2905                 return -EINVAL;
2906
2907         acl = parse_acl_data(&rdev->wiphy, info);
2908         if (IS_ERR(acl))
2909                 return PTR_ERR(acl);
2910
2911         err = rdev_set_mac_acl(rdev, dev, acl);
2912
2913         kfree(acl);
2914
2915         return err;
2916 }
2917
2918 static int nl80211_parse_beacon(struct genl_info *info,
2919                                 struct cfg80211_beacon_data *bcn)
2920 {
2921         bool haveinfo = false;
2922
2923         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2924             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2925             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2926             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2927                 return -EINVAL;
2928
2929         memset(bcn, 0, sizeof(*bcn));
2930
2931         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2932                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2933                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2934                 if (!bcn->head_len)
2935                         return -EINVAL;
2936                 haveinfo = true;
2937         }
2938
2939         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2940                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2941                 bcn->tail_len =
2942                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2943                 haveinfo = true;
2944         }
2945
2946         if (!haveinfo)
2947                 return -EINVAL;
2948
2949         if (info->attrs[NL80211_ATTR_IE]) {
2950                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2951                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2952         }
2953
2954         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2955                 bcn->proberesp_ies =
2956                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2957                 bcn->proberesp_ies_len =
2958                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2959         }
2960
2961         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2962                 bcn->assocresp_ies =
2963                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2964                 bcn->assocresp_ies_len =
2965                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2966         }
2967
2968         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2969                 bcn->probe_resp =
2970                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2971                 bcn->probe_resp_len =
2972                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2973         }
2974
2975         return 0;
2976 }
2977
2978 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2979                                    struct cfg80211_ap_settings *params)
2980 {
2981         struct wireless_dev *wdev;
2982         bool ret = false;
2983
2984         mutex_lock(&rdev->devlist_mtx);
2985
2986         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2987                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2988                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2989                         continue;
2990
2991                 if (!wdev->preset_chandef.chan)
2992                         continue;
2993
2994                 params->chandef = wdev->preset_chandef;
2995                 ret = true;
2996                 break;
2997         }
2998
2999         mutex_unlock(&rdev->devlist_mtx);
3000
3001         return ret;
3002 }
3003
3004 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3005                                     enum nl80211_auth_type auth_type,
3006                                     enum nl80211_commands cmd)
3007 {
3008         if (auth_type > NL80211_AUTHTYPE_MAX)
3009                 return false;
3010
3011         switch (cmd) {
3012         case NL80211_CMD_AUTHENTICATE:
3013                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3014                     auth_type == NL80211_AUTHTYPE_SAE)
3015                         return false;
3016                 return true;
3017         case NL80211_CMD_CONNECT:
3018         case NL80211_CMD_START_AP:
3019                 /* SAE not supported yet */
3020                 if (auth_type == NL80211_AUTHTYPE_SAE)
3021                         return false;
3022                 return true;
3023         default:
3024                 return false;
3025         }
3026 }
3027
3028 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3029 {
3030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3031         struct net_device *dev = info->user_ptr[1];
3032         struct wireless_dev *wdev = dev->ieee80211_ptr;
3033         struct cfg80211_ap_settings params;
3034         int err;
3035         u8 radar_detect_width = 0;
3036
3037         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3038             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3039                 return -EOPNOTSUPP;
3040
3041         if (!rdev->ops->start_ap)
3042                 return -EOPNOTSUPP;
3043
3044         if (wdev->beacon_interval)
3045                 return -EALREADY;
3046
3047         memset(&params, 0, sizeof(params));
3048
3049         /* these are required for START_AP */
3050         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3051             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3052             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3053                 return -EINVAL;
3054
3055         err = nl80211_parse_beacon(info, &params.beacon);
3056         if (err)
3057                 return err;
3058
3059         params.beacon_interval =
3060                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3061         params.dtim_period =
3062                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3063
3064         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3065         if (err)
3066                 return err;
3067
3068         /*
3069          * In theory, some of these attributes should be required here
3070          * but since they were not used when the command was originally
3071          * added, keep them optional for old user space programs to let
3072          * them continue to work with drivers that do not need the
3073          * additional information -- drivers must check!
3074          */
3075         if (info->attrs[NL80211_ATTR_SSID]) {
3076                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3077                 params.ssid_len =
3078                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3079                 if (params.ssid_len == 0 ||
3080                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3081                         return -EINVAL;
3082         }
3083
3084         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3085                 params.hidden_ssid = nla_get_u32(
3086                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3087                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3088                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3089                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3090                         return -EINVAL;
3091         }
3092
3093         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3094
3095         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3096                 params.auth_type = nla_get_u32(
3097                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3098                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3099                                              NL80211_CMD_START_AP))
3100                         return -EINVAL;
3101         } else
3102                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3103
3104         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3105                                       NL80211_MAX_NR_CIPHER_SUITES);
3106         if (err)
3107                 return err;
3108
3109         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3110                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3111                         return -EOPNOTSUPP;
3112                 params.inactivity_timeout = nla_get_u16(
3113                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3114         }
3115
3116         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3117                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3118                         return -EINVAL;
3119                 params.p2p_ctwindow =
3120                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3121                 if (params.p2p_ctwindow > 127)
3122                         return -EINVAL;
3123                 if (params.p2p_ctwindow != 0 &&
3124                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3125                         return -EINVAL;
3126         }
3127
3128         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3129                 u8 tmp;
3130
3131                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3132                         return -EINVAL;
3133                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3134                 if (tmp > 1)
3135                         return -EINVAL;
3136                 params.p2p_opp_ps = tmp;
3137                 if (params.p2p_opp_ps != 0 &&
3138                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3139                         return -EINVAL;
3140         }
3141
3142         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3143                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3144                 if (err)
3145                         return err;
3146         } else if (wdev->preset_chandef.chan) {
3147                 params.chandef = wdev->preset_chandef;
3148         } else if (!nl80211_get_ap_channel(rdev, &params))
3149                 return -EINVAL;
3150
3151         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3152                 return -EINVAL;
3153
3154         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3155         if (err < 0)
3156                 return err;
3157         if (err) {
3158                 radar_detect_width = BIT(params.chandef.width);
3159                 params.radar_required = true;
3160         }
3161
3162         mutex_lock(&rdev->devlist_mtx);
3163         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3164                                            params.chandef.chan,
3165                                            CHAN_MODE_SHARED,
3166                                            radar_detect_width);
3167         mutex_unlock(&rdev->devlist_mtx);
3168
3169         if (err)
3170                 return err;
3171
3172         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3173                 params.acl = parse_acl_data(&rdev->wiphy, info);
3174                 if (IS_ERR(params.acl))
3175                         return PTR_ERR(params.acl);
3176         }
3177
3178         err = rdev_start_ap(rdev, dev, &params);
3179         if (!err) {
3180                 wdev->preset_chandef = params.chandef;
3181                 wdev->beacon_interval = params.beacon_interval;
3182                 wdev->channel = params.chandef.chan;
3183                 wdev->ssid_len = params.ssid_len;
3184                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3185         }
3186
3187         kfree(params.acl);
3188
3189         return err;
3190 }
3191
3192 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3193 {
3194         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3195         struct net_device *dev = info->user_ptr[1];
3196         struct wireless_dev *wdev = dev->ieee80211_ptr;
3197         struct cfg80211_beacon_data params;
3198         int err;
3199
3200         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3201             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3202                 return -EOPNOTSUPP;
3203
3204         if (!rdev->ops->change_beacon)
3205                 return -EOPNOTSUPP;
3206
3207         if (!wdev->beacon_interval)
3208                 return -EINVAL;
3209
3210         err = nl80211_parse_beacon(info, &params);
3211         if (err)
3212                 return err;
3213
3214         return rdev_change_beacon(rdev, dev, &params);
3215 }
3216
3217 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3218 {
3219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3220         struct net_device *dev = info->user_ptr[1];
3221
3222         return cfg80211_stop_ap(rdev, dev);
3223 }
3224
3225 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3226         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3227         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3228         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3229         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3230         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3231         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3232 };
3233
3234 static int parse_station_flags(struct genl_info *info,
3235                                enum nl80211_iftype iftype,
3236                                struct station_parameters *params)
3237 {
3238         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3239         struct nlattr *nla;
3240         int flag;
3241
3242         /*
3243          * Try parsing the new attribute first so userspace
3244          * can specify both for older kernels.
3245          */
3246         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3247         if (nla) {
3248                 struct nl80211_sta_flag_update *sta_flags;
3249
3250                 sta_flags = nla_data(nla);
3251                 params->sta_flags_mask = sta_flags->mask;
3252                 params->sta_flags_set = sta_flags->set;
3253                 params->sta_flags_set &= params->sta_flags_mask;
3254                 if ((params->sta_flags_mask |
3255                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3256                         return -EINVAL;
3257                 return 0;
3258         }
3259
3260         /* if present, parse the old attribute */
3261
3262         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3263         if (!nla)
3264                 return 0;
3265
3266         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3267                              nla, sta_flags_policy))
3268                 return -EINVAL;
3269
3270         /*
3271          * Only allow certain flags for interface types so that
3272          * other attributes are silently ignored. Remember that
3273          * this is backward compatibility code with old userspace
3274          * and shouldn't be hit in other cases anyway.
3275          */
3276         switch (iftype) {
3277         case NL80211_IFTYPE_AP:
3278         case NL80211_IFTYPE_AP_VLAN:
3279         case NL80211_IFTYPE_P2P_GO:
3280                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3281                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3282                                          BIT(NL80211_STA_FLAG_WME) |
3283                                          BIT(NL80211_STA_FLAG_MFP);
3284                 break;
3285         case NL80211_IFTYPE_P2P_CLIENT:
3286         case NL80211_IFTYPE_STATION:
3287                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3288                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3289                 break;
3290         case NL80211_IFTYPE_MESH_POINT:
3291                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3292                                          BIT(NL80211_STA_FLAG_MFP) |
3293                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3294         default:
3295                 return -EINVAL;
3296         }
3297
3298         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3299                 if (flags[flag]) {
3300                         params->sta_flags_set |= (1<<flag);
3301
3302                         /* no longer support new API additions in old API */
3303                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3304                                 return -EINVAL;
3305                 }
3306         }
3307
3308         return 0;
3309 }
3310
3311 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3312                                  int attr)
3313 {
3314         struct nlattr *rate;
3315         u32 bitrate;
3316         u16 bitrate_compat;
3317
3318         rate = nla_nest_start(msg, attr);
3319         if (!rate)
3320                 return false;
3321
3322         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3323         bitrate = cfg80211_calculate_bitrate(info);
3324         /* report 16-bit bitrate only if we can */
3325         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3326         if (bitrate > 0 &&
3327             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3328                 return false;
3329         if (bitrate_compat > 0 &&
3330             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3331                 return false;
3332
3333         if (info->flags & RATE_INFO_FLAGS_MCS) {
3334                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3335                         return false;
3336                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3337                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3338                         return false;
3339                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3340                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3341                         return false;
3342         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3343                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3344                         return false;
3345                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3346                         return false;
3347                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3348                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3349                         return false;
3350                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3351                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3352                         return false;
3353                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3354                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3355                         return false;
3356                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3357                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3358                         return false;
3359                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3360                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3361                         return false;
3362         }
3363
3364         nla_nest_end(msg, rate);
3365         return true;
3366 }
3367
3368 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3369                                 int flags,
3370                                 struct cfg80211_registered_device *rdev,
3371                                 struct net_device *dev,
3372                                 const u8 *mac_addr, struct station_info *sinfo)
3373 {
3374         void *hdr;
3375         struct nlattr *sinfoattr, *bss_param;
3376
3377         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3378         if (!hdr)
3379                 return -1;
3380
3381         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3382             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3383             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3384                 goto nla_put_failure;
3385
3386         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3387         if (!sinfoattr)
3388                 goto nla_put_failure;
3389         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3390             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3391                         sinfo->connected_time))
3392                 goto nla_put_failure;
3393         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3394             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3395                         sinfo->inactive_time))
3396                 goto nla_put_failure;
3397         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3398                               STATION_INFO_RX_BYTES64)) &&
3399             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3400                         (u32)sinfo->rx_bytes))
3401                 goto nla_put_failure;
3402         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3403                               NL80211_STA_INFO_TX_BYTES64)) &&
3404             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3405                         (u32)sinfo->tx_bytes))
3406                 goto nla_put_failure;
3407         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3408             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3409                         sinfo->rx_bytes))
3410                 goto nla_put_failure;
3411         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3412             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3413                         sinfo->tx_bytes))
3414                 goto nla_put_failure;
3415         if ((sinfo->filled & STATION_INFO_LLID) &&
3416             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & STATION_INFO_PLID) &&
3419             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3420                 goto nla_put_failure;
3421         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3422             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3423                        sinfo->plink_state))
3424                 goto nla_put_failure;
3425         switch (rdev->wiphy.signal_type) {
3426         case CFG80211_SIGNAL_TYPE_MBM:
3427                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3428                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3429                                sinfo->signal))
3430                         goto nla_put_failure;
3431                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3432                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3433                                sinfo->signal_avg))
3434                         goto nla_put_failure;
3435                 break;
3436         default:
3437                 break;
3438         }
3439         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3440                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3441                                           NL80211_STA_INFO_TX_BITRATE))
3442                         goto nla_put_failure;
3443         }
3444         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3445                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3446                                           NL80211_STA_INFO_RX_BITRATE))
3447                         goto nla_put_failure;
3448         }
3449         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3450             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3451                         sinfo->rx_packets))
3452                 goto nla_put_failure;
3453         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3454             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3455                         sinfo->tx_packets))
3456                 goto nla_put_failure;
3457         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3458             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3459                         sinfo->tx_retries))
3460                 goto nla_put_failure;
3461         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3462             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3463                         sinfo->tx_failed))
3464                 goto nla_put_failure;
3465         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3466             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3467                         sinfo->beacon_loss_count))
3468                 goto nla_put_failure;
3469         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3470             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3471                         sinfo->local_pm))
3472                 goto nla_put_failure;
3473         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3474             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3475                         sinfo->peer_pm))
3476                 goto nla_put_failure;
3477         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3478             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3479                         sinfo->nonpeer_pm))
3480                 goto nla_put_failure;
3481         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3482                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3483                 if (!bss_param)
3484                         goto nla_put_failure;
3485
3486                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3487                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3488                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3489                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3490                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3491                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3492                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3493                                sinfo->bss_param.dtim_period) ||
3494                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3495                                 sinfo->bss_param.beacon_interval))
3496                         goto nla_put_failure;
3497
3498                 nla_nest_end(msg, bss_param);
3499         }
3500         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3501             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3502                     sizeof(struct nl80211_sta_flag_update),
3503                     &sinfo->sta_flags))
3504                 goto nla_put_failure;
3505         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3506                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3507                             sinfo->t_offset))
3508                 goto nla_put_failure;
3509         nla_nest_end(msg, sinfoattr);
3510
3511         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3512             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3513                     sinfo->assoc_req_ies))
3514                 goto nla_put_failure;
3515
3516         return genlmsg_end(msg, hdr);
3517
3518  nla_put_failure:
3519         genlmsg_cancel(msg, hdr);
3520         return -EMSGSIZE;
3521 }
3522
3523 static int nl80211_dump_station(struct sk_buff *skb,
3524                                 struct netlink_callback *cb)
3525 {
3526         struct station_info sinfo;
3527         struct cfg80211_registered_device *dev;
3528         struct net_device *netdev;
3529         u8 mac_addr[ETH_ALEN];
3530         int sta_idx = cb->args[1];
3531         int err;
3532
3533         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3534         if (err)
3535                 return err;
3536
3537         if (!dev->ops->dump_station) {
3538                 err = -EOPNOTSUPP;
3539                 goto out_err;
3540         }
3541
3542         while (1) {
3543                 memset(&sinfo, 0, sizeof(sinfo));
3544                 err = rdev_dump_station(dev, netdev, sta_idx,
3545                                         mac_addr, &sinfo);
3546                 if (err == -ENOENT)
3547                         break;
3548                 if (err)
3549                         goto out_err;
3550
3551                 if (nl80211_send_station(skb,
3552                                 NETLINK_CB(cb->skb).portid,
3553                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3554                                 dev, netdev, mac_addr,
3555                                 &sinfo) < 0)
3556                         goto out;
3557
3558                 sta_idx++;
3559         }
3560
3561
3562  out:
3563         cb->args[1] = sta_idx;
3564         err = skb->len;
3565  out_err:
3566         nl80211_finish_netdev_dump(dev);
3567
3568         return err;
3569 }
3570
3571 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3572 {
3573         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3574         struct net_device *dev = info->user_ptr[1];
3575         struct station_info sinfo;
3576         struct sk_buff *msg;
3577         u8 *mac_addr = NULL;
3578         int err;
3579
3580         memset(&sinfo, 0, sizeof(sinfo));
3581
3582         if (!info->attrs[NL80211_ATTR_MAC])
3583                 return -EINVAL;
3584
3585         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3586
3587         if (!rdev->ops->get_station)
3588                 return -EOPNOTSUPP;
3589
3590         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3591         if (err)
3592                 return err;
3593
3594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3595         if (!msg)
3596                 return -ENOMEM;
3597
3598         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3599                                  rdev, dev, mac_addr, &sinfo) < 0) {
3600                 nlmsg_free(msg);
3601                 return -ENOBUFS;
3602         }
3603
3604         return genlmsg_reply(msg, info);
3605 }
3606
3607 int cfg80211_check_station_change(struct wiphy *wiphy,
3608                                   struct station_parameters *params,
3609                                   enum cfg80211_station_type statype)
3610 {
3611         if (params->listen_interval != -1)
3612                 return -EINVAL;
3613         if (params->aid)
3614                 return -EINVAL;
3615
3616         /* When you run into this, adjust the code below for the new flag */
3617         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3618
3619         switch (statype) {
3620         case CFG80211_STA_MESH_PEER_NONSEC:
3621         case CFG80211_STA_MESH_PEER_SECURE:
3622                 /*
3623                  * No ignoring the TDLS flag here -- the userspace mesh
3624                  * code doesn't have the bug of including TDLS in the
3625                  * mask everywhere.
3626                  */
3627                 if (params->sta_flags_mask &
3628                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3629                                   BIT(NL80211_STA_FLAG_MFP) |
3630                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3631                         return -EINVAL;
3632                 break;
3633         case CFG80211_STA_TDLS_PEER_SETUP:
3634         case CFG80211_STA_TDLS_PEER_ACTIVE:
3635                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3636                         return -EINVAL;
3637                 /* ignore since it can't change */
3638                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3639                 break;
3640         default:
3641                 /* disallow mesh-specific things */
3642                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3643                         return -EINVAL;
3644                 if (params->local_pm)
3645                         return -EINVAL;
3646                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3647                         return -EINVAL;
3648         }
3649
3650         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3651             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3652                 /* TDLS can't be set, ... */
3653                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3654                         return -EINVAL;
3655                 /*
3656                  * ... but don't bother the driver with it. This works around
3657                  * a hostapd/wpa_supplicant issue -- it always includes the
3658                  * TLDS_PEER flag in the mask even for AP mode.
3659                  */
3660                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3661         }
3662
3663         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3664                 /* reject other things that can't change */
3665                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3666                         return -EINVAL;
3667                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3668                         return -EINVAL;
3669                 if (params->supported_rates)
3670                         return -EINVAL;
3671                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3672                         return -EINVAL;
3673         }
3674
3675         if (statype != CFG80211_STA_AP_CLIENT) {
3676                 if (params->vlan)
3677                         return -EINVAL;
3678         }
3679
3680         switch (statype) {
3681         case CFG80211_STA_AP_MLME_CLIENT:
3682                 /* Use this only for authorizing/unauthorizing a station */
3683                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3684                         return -EOPNOTSUPP;
3685                 break;
3686         case CFG80211_STA_AP_CLIENT:
3687                 /* accept only the listed bits */
3688                 if (params->sta_flags_mask &
3689                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3690                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3691                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3692                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3693                                   BIT(NL80211_STA_FLAG_WME) |
3694                                   BIT(NL80211_STA_FLAG_MFP)))
3695                         return -EINVAL;
3696
3697                 /* but authenticated/associated only if driver handles it */
3698                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3699                     params->sta_flags_mask &
3700                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3701                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3702                         return -EINVAL;
3703                 break;
3704         case CFG80211_STA_IBSS:
3705         case CFG80211_STA_AP_STA:
3706                 /* reject any changes other than AUTHORIZED */
3707                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3708                         return -EINVAL;
3709                 break;
3710         case CFG80211_STA_TDLS_PEER_SETUP:
3711                 /* reject any changes other than AUTHORIZED or WME */
3712                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3713                                                BIT(NL80211_STA_FLAG_WME)))
3714                         return -EINVAL;
3715                 /* force (at least) rates when authorizing */
3716                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3717                     !params->supported_rates)
3718                         return -EINVAL;
3719                 break;
3720         case CFG80211_STA_TDLS_PEER_ACTIVE:
3721                 /* reject any changes */
3722                 return -EINVAL;
3723         case CFG80211_STA_MESH_PEER_NONSEC:
3724                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3725                         return -EINVAL;
3726                 break;
3727         case CFG80211_STA_MESH_PEER_SECURE:
3728                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3729                         return -EINVAL;
3730                 break;
3731         }
3732
3733         return 0;
3734 }
3735 EXPORT_SYMBOL(cfg80211_check_station_change);
3736
3737 /*
3738  * Get vlan interface making sure it is running and on the right wiphy.
3739  */
3740 static struct net_device *get_vlan(struct genl_info *info,
3741                                    struct cfg80211_registered_device *rdev)
3742 {
3743         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3744         struct net_device *v;
3745         int ret;
3746
3747         if (!vlanattr)
3748                 return NULL;
3749
3750         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3751         if (!v)
3752                 return ERR_PTR(-ENODEV);
3753
3754         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3755                 ret = -EINVAL;
3756                 goto error;
3757         }
3758
3759         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3760             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3761             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3762                 ret = -EINVAL;
3763                 goto error;
3764         }
3765
3766         if (!netif_running(v)) {
3767                 ret = -ENETDOWN;
3768                 goto error;
3769         }
3770
3771         return v;
3772  error:
3773         dev_put(v);
3774         return ERR_PTR(ret);
3775 }
3776
3777 static struct nla_policy
3778 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3779         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3780         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3781 };
3782
3783 static int nl80211_parse_sta_wme(struct genl_info *info,
3784                                  struct station_parameters *params)
3785 {
3786         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3787         struct nlattr *nla;
3788         int err;
3789
3790         /* parse WME attributes if present */
3791         if (!info->attrs[NL80211_ATTR_STA_WME])
3792                 return 0;
3793
3794         nla = info->attrs[NL80211_ATTR_STA_WME];
3795         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3796                                nl80211_sta_wme_policy);
3797         if (err)
3798                 return err;
3799
3800         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3801                 params->uapsd_queues = nla_get_u8(
3802                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3803         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3804                 return -EINVAL;
3805
3806         if (tb[NL80211_STA_WME_MAX_SP])
3807                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3808
3809         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3810                 return -EINVAL;
3811
3812         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3813
3814         return 0;
3815 }
3816
3817 static int nl80211_set_station_tdls(struct genl_info *info,
3818                                     struct station_parameters *params)
3819 {
3820         /* Dummy STA entry gets updated once the peer capabilities are known */
3821         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3822                 params->ht_capa =
3823                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3824         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3825                 params->vht_capa =
3826                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3827
3828         return nl80211_parse_sta_wme(info, params);
3829 }
3830
3831 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3832 {
3833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3834         struct net_device *dev = info->user_ptr[1];
3835         struct station_parameters params;
3836         u8 *mac_addr;
3837         int err;
3838
3839         memset(&params, 0, sizeof(params));
3840
3841         params.listen_interval = -1;
3842
3843         if (!rdev->ops->change_station)
3844                 return -EOPNOTSUPP;
3845
3846         if (info->attrs[NL80211_ATTR_STA_AID])
3847                 return -EINVAL;
3848
3849         if (!info->attrs[NL80211_ATTR_MAC])
3850                 return -EINVAL;
3851
3852         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3853
3854         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3855                 params.supported_rates =
3856                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3857                 params.supported_rates_len =
3858                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3859         }
3860
3861         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3862                 params.capability =
3863                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3864                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3865         }
3866
3867         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3868                 params.ext_capab =
3869                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3870                 params.ext_capab_len =
3871                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3872         }
3873
3874         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3875                 return -EINVAL;
3876
3877         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3878                 return -EINVAL;
3879
3880         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3881                 params.plink_action =
3882                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3883                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3884                         return -EINVAL;
3885         }
3886
3887         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3888                 params.plink_state =
3889                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3890                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3891                         return -EINVAL;
3892                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3893         }
3894
3895         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3896                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3897                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3898
3899                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3900                     pm > NL80211_MESH_POWER_MAX)
3901                         return -EINVAL;
3902
3903                 params.local_pm = pm;
3904         }
3905
3906         /* Include parameters for TDLS peer (will check later) */
3907         err = nl80211_set_station_tdls(info, &params);
3908         if (err)
3909                 return err;
3910
3911         params.vlan = get_vlan(info, rdev);
3912         if (IS_ERR(params.vlan))
3913                 return PTR_ERR(params.vlan);
3914
3915         switch (dev->ieee80211_ptr->iftype) {
3916         case NL80211_IFTYPE_AP:
3917         case NL80211_IFTYPE_AP_VLAN:
3918         case NL80211_IFTYPE_P2P_GO:
3919         case NL80211_IFTYPE_P2P_CLIENT:
3920         case NL80211_IFTYPE_STATION:
3921         case NL80211_IFTYPE_ADHOC:
3922         case NL80211_IFTYPE_MESH_POINT:
3923                 break;
3924         default:
3925                 err = -EOPNOTSUPP;
3926                 goto out_put_vlan;
3927         }
3928
3929         /* driver will call cfg80211_check_station_change() */
3930         err = rdev_change_station(rdev, dev, mac_addr, &params);
3931
3932  out_put_vlan:
3933         if (params.vlan)
3934                 dev_put(params.vlan);
3935
3936         return err;
3937 }
3938
3939 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3940 {
3941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3942         int err;
3943         struct net_device *dev = info->user_ptr[1];
3944         struct station_parameters params;
3945         u8 *mac_addr = NULL;
3946
3947         memset(&params, 0, sizeof(params));
3948
3949         if (!rdev->ops->add_station)
3950                 return -EOPNOTSUPP;
3951
3952         if (!info->attrs[NL80211_ATTR_MAC])
3953                 return -EINVAL;
3954
3955         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3956                 return -EINVAL;
3957
3958         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3959                 return -EINVAL;
3960
3961         if (!info->attrs[NL80211_ATTR_STA_AID])
3962                 return -EINVAL;
3963
3964         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3965         params.supported_rates =
3966                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3967         params.supported_rates_len =
3968                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3969         params.listen_interval =
3970                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3971
3972         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3973         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3974                 return -EINVAL;
3975
3976         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3977                 params.capability =
3978                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3979                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3980         }
3981
3982         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3983                 params.ext_capab =
3984                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3985                 params.ext_capab_len =
3986                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3987         }
3988
3989         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3990                 params.ht_capa =
3991                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3992
3993         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3994                 params.vht_capa =
3995                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3996
3997         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3998                 params.plink_action =
3999                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4000                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4001                         return -EINVAL;
4002         }
4003
4004         err = nl80211_parse_sta_wme(info, &params);
4005         if (err)
4006                 return err;
4007
4008         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4009                 return -EINVAL;
4010
4011         /* When you run into this, adjust the code below for the new flag */
4012         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4013
4014         switch (dev->ieee80211_ptr->iftype) {
4015         case NL80211_IFTYPE_AP:
4016         case NL80211_IFTYPE_AP_VLAN:
4017         case NL80211_IFTYPE_P2P_GO:
4018                 /* ignore WME attributes if iface/sta is not capable */
4019                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4020                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4021                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4022
4023                 /* TDLS peers cannot be added */
4024                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4025                         return -EINVAL;
4026                 /* but don't bother the driver with it */
4027                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4028
4029                 /* allow authenticated/associated only if driver handles it */
4030                 if (!(rdev->wiphy.features &
4031                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4032                     params.sta_flags_mask &
4033                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4034                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4035                         return -EINVAL;
4036
4037                 /* must be last in here for error handling */
4038                 params.vlan = get_vlan(info, rdev);
4039                 if (IS_ERR(params.vlan))
4040                         return PTR_ERR(params.vlan);
4041                 break;
4042         case NL80211_IFTYPE_MESH_POINT:
4043                 /* ignore uAPSD data */
4044                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4045
4046                 /* associated is disallowed */
4047                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4048                         return -EINVAL;
4049                 /* TDLS peers cannot be added */
4050                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4051                         return -EINVAL;
4052                 break;
4053         case NL80211_IFTYPE_STATION:
4054         case NL80211_IFTYPE_P2P_CLIENT:
4055                 /* ignore uAPSD data */
4056                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4057
4058                 /* these are disallowed */
4059                 if (params.sta_flags_mask &
4060                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4061                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4062                         return -EINVAL;
4063                 /* Only TDLS peers can be added */
4064                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4065                         return -EINVAL;
4066                 /* Can only add if TDLS ... */
4067                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4068                         return -EOPNOTSUPP;
4069                 /* ... with external setup is supported */
4070                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4071                         return -EOPNOTSUPP;
4072                 /*
4073                  * Older wpa_supplicant versions always mark the TDLS peer
4074                  * as authorized, but it shouldn't yet be.
4075                  */
4076                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4077                 break;
4078         default:
4079                 return -EOPNOTSUPP;
4080         }
4081
4082         /* be aware of params.vlan when changing code here */
4083
4084         err = rdev_add_station(rdev, dev, mac_addr, &params);
4085
4086         if (params.vlan)
4087                 dev_put(params.vlan);
4088         return err;
4089 }
4090
4091 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4092 {
4093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4094         struct net_device *dev = info->user_ptr[1];
4095         u8 *mac_addr = NULL;
4096
4097         if (info->attrs[NL80211_ATTR_MAC])
4098                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4099
4100         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4101             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4102             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4103             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4104                 return -EINVAL;
4105
4106         if (!rdev->ops->del_station)
4107                 return -EOPNOTSUPP;
4108
4109         return rdev_del_station(rdev, dev, mac_addr);
4110 }
4111
4112 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4113                                 int flags, struct net_device *dev,
4114                                 u8 *dst, u8 *next_hop,
4115                                 struct mpath_info *pinfo)
4116 {
4117         void *hdr;
4118         struct nlattr *pinfoattr;
4119
4120         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4121         if (!hdr)
4122                 return -1;
4123
4124         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4125             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4126             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4127             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4128                 goto nla_put_failure;
4129
4130         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4131         if (!pinfoattr)
4132                 goto nla_put_failure;
4133         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4134             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4135                         pinfo->frame_qlen))
4136                 goto nla_put_failure;
4137         if (((pinfo->filled & MPATH_INFO_SN) &&
4138              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4139             ((pinfo->filled & MPATH_INFO_METRIC) &&
4140              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4141                          pinfo->metric)) ||
4142             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4143              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4144                          pinfo->exptime)) ||
4145             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4146              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4147                         pinfo->flags)) ||
4148             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4149              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4150                          pinfo->discovery_timeout)) ||
4151             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4152              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4153                         pinfo->discovery_retries)))
4154                 goto nla_put_failure;
4155
4156         nla_nest_end(msg, pinfoattr);
4157
4158         return genlmsg_end(msg, hdr);
4159
4160  nla_put_failure:
4161         genlmsg_cancel(msg, hdr);
4162         return -EMSGSIZE;
4163 }
4164
4165 static int nl80211_dump_mpath(struct sk_buff *skb,
4166                               struct netlink_callback *cb)
4167 {
4168         struct mpath_info pinfo;
4169         struct cfg80211_registered_device *dev;
4170         struct net_device *netdev;
4171         u8 dst[ETH_ALEN];
4172         u8 next_hop[ETH_ALEN];
4173         int path_idx = cb->args[1];
4174         int err;
4175
4176         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4177         if (err)
4178                 return err;
4179
4180         if (!dev->ops->dump_mpath) {
4181                 err = -EOPNOTSUPP;
4182                 goto out_err;
4183         }
4184
4185         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
4186                 err = -EOPNOTSUPP;
4187                 goto out_err;
4188         }
4189
4190         while (1) {
4191                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
4192                                       &pinfo);
4193                 if (err == -ENOENT)
4194                         break;
4195                 if (err)
4196                         goto out_err;
4197
4198                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4199                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4200                                        netdev, dst, next_hop,
4201                                        &pinfo) < 0)
4202                         goto out;
4203
4204                 path_idx++;
4205         }
4206
4207
4208  out:
4209         cb->args[1] = path_idx;
4210         err = skb->len;
4211  out_err:
4212         nl80211_finish_netdev_dump(dev);
4213         return err;
4214 }
4215
4216 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4217 {
4218         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4219         int err;
4220         struct net_device *dev = info->user_ptr[1];
4221         struct mpath_info pinfo;
4222         struct sk_buff *msg;
4223         u8 *dst = NULL;
4224         u8 next_hop[ETH_ALEN];
4225
4226         memset(&pinfo, 0, sizeof(pinfo));
4227
4228         if (!info->attrs[NL80211_ATTR_MAC])
4229                 return -EINVAL;
4230
4231         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4232
4233         if (!rdev->ops->get_mpath)
4234                 return -EOPNOTSUPP;
4235
4236         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4237                 return -EOPNOTSUPP;
4238
4239         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4240         if (err)
4241                 return err;
4242
4243         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4244         if (!msg)
4245                 return -ENOMEM;
4246
4247         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4248                                  dev, dst, next_hop, &pinfo) < 0) {
4249                 nlmsg_free(msg);
4250                 return -ENOBUFS;
4251         }
4252
4253         return genlmsg_reply(msg, info);
4254 }
4255
4256 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4257 {
4258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4259         struct net_device *dev = info->user_ptr[1];
4260         u8 *dst = NULL;
4261         u8 *next_hop = NULL;
4262
4263         if (!info->attrs[NL80211_ATTR_MAC])
4264                 return -EINVAL;
4265
4266         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4267                 return -EINVAL;
4268
4269         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4270         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4271
4272         if (!rdev->ops->change_mpath)
4273                 return -EOPNOTSUPP;
4274
4275         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4276                 return -EOPNOTSUPP;
4277
4278         return rdev_change_mpath(rdev, dev, dst, next_hop);
4279 }
4280
4281 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4282 {
4283         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4284         struct net_device *dev = info->user_ptr[1];
4285         u8 *dst = NULL;
4286         u8 *next_hop = NULL;
4287
4288         if (!info->attrs[NL80211_ATTR_MAC])
4289                 return -EINVAL;
4290
4291         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4292                 return -EINVAL;
4293
4294         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4295         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4296
4297         if (!rdev->ops->add_mpath)
4298                 return -EOPNOTSUPP;
4299
4300         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4301                 return -EOPNOTSUPP;
4302
4303         return rdev_add_mpath(rdev, dev, dst, next_hop);
4304 }
4305
4306 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4307 {
4308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4309         struct net_device *dev = info->user_ptr[1];
4310         u8 *dst = NULL;
4311
4312         if (info->attrs[NL80211_ATTR_MAC])
4313                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4314
4315         if (!rdev->ops->del_mpath)
4316                 return -EOPNOTSUPP;
4317
4318         return rdev_del_mpath(rdev, dev, dst);
4319 }
4320
4321 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4322 {
4323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4324         struct net_device *dev = info->user_ptr[1];
4325         struct bss_parameters params;
4326
4327         memset(&params, 0, sizeof(params));
4328         /* default to not changing parameters */
4329         params.use_cts_prot = -1;
4330         params.use_short_preamble = -1;
4331         params.use_short_slot_time = -1;
4332         params.ap_isolate = -1;
4333         params.ht_opmode = -1;
4334         params.p2p_ctwindow = -1;
4335         params.p2p_opp_ps = -1;
4336
4337         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4338                 params.use_cts_prot =
4339                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4340         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4341                 params.use_short_preamble =
4342                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4343         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4344                 params.use_short_slot_time =
4345                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4346         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4347                 params.basic_rates =
4348                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4349                 params.basic_rates_len =
4350                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4351         }
4352         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4353                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4354         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4355                 params.ht_opmode =
4356                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4357
4358         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4359                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4360                         return -EINVAL;
4361                 params.p2p_ctwindow =
4362                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4363                 if (params.p2p_ctwindow < 0)
4364                         return -EINVAL;
4365                 if (params.p2p_ctwindow != 0 &&
4366                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4367                         return -EINVAL;
4368         }
4369
4370         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4371                 u8 tmp;
4372
4373                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4374                         return -EINVAL;
4375                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4376                 if (tmp > 1)
4377                         return -EINVAL;
4378                 params.p2p_opp_ps = tmp;
4379                 if (params.p2p_opp_ps &&
4380                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4381                         return -EINVAL;
4382         }
4383
4384         if (!rdev->ops->change_bss)
4385                 return -EOPNOTSUPP;
4386
4387         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4388             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4389                 return -EOPNOTSUPP;
4390
4391         return rdev_change_bss(rdev, dev, &params);
4392 }
4393
4394 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4395         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4396         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4397         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4398         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4399         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4400         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4401 };
4402
4403 static int parse_reg_rule(struct nlattr *tb[],
4404         struct ieee80211_reg_rule *reg_rule)
4405 {
4406         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4407         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4408
4409         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4410                 return -EINVAL;
4411         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4412                 return -EINVAL;
4413         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4414                 return -EINVAL;
4415         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4416                 return -EINVAL;
4417         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4418                 return -EINVAL;
4419
4420         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4421
4422         freq_range->start_freq_khz =
4423                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4424         freq_range->end_freq_khz =
4425                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4426         freq_range->max_bandwidth_khz =
4427                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4428
4429         power_rule->max_eirp =
4430                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4431
4432         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4433                 power_rule->max_antenna_gain =
4434                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4435
4436         return 0;
4437 }
4438
4439 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4440 {
4441         int r;
4442         char *data = NULL;
4443         enum nl80211_user_reg_hint_type user_reg_hint_type;
4444
4445         /*
4446          * You should only get this when cfg80211 hasn't yet initialized
4447          * completely when built-in to the kernel right between the time
4448          * window between nl80211_init() and regulatory_init(), if that is
4449          * even possible.
4450          */
4451         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4452                 return -EINPROGRESS;
4453
4454         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4455                 return -EINVAL;
4456
4457         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4458
4459         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4460                 user_reg_hint_type =
4461                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4462         else
4463                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4464
4465         switch (user_reg_hint_type) {
4466         case NL80211_USER_REG_HINT_USER:
4467         case NL80211_USER_REG_HINT_CELL_BASE:
4468                 break;
4469         default:
4470                 return -EINVAL;
4471         }
4472
4473         r = regulatory_hint_user(data, user_reg_hint_type);
4474
4475         return r;
4476 }
4477
4478 static int nl80211_get_mesh_config(struct sk_buff *skb,
4479                                    struct genl_info *info)
4480 {
4481         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4482         struct net_device *dev = info->user_ptr[1];
4483         struct wireless_dev *wdev = dev->ieee80211_ptr;
4484         struct mesh_config cur_params;
4485         int err = 0;
4486         void *hdr;
4487         struct nlattr *pinfoattr;
4488         struct sk_buff *msg;
4489
4490         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4491                 return -EOPNOTSUPP;
4492
4493         if (!rdev->ops->get_mesh_config)
4494                 return -EOPNOTSUPP;
4495
4496         wdev_lock(wdev);
4497         /* If not connected, get default parameters */
4498         if (!wdev->mesh_id_len)
4499                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4500         else
4501                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4502         wdev_unlock(wdev);
4503
4504         if (err)
4505                 return err;
4506
4507         /* Draw up a netlink message to send back */
4508         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4509         if (!msg)
4510                 return -ENOMEM;
4511         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4512                              NL80211_CMD_GET_MESH_CONFIG);
4513         if (!hdr)
4514                 goto out;
4515         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4516         if (!pinfoattr)
4517                 goto nla_put_failure;
4518         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4519             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4520                         cur_params.dot11MeshRetryTimeout) ||
4521             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4522                         cur_params.dot11MeshConfirmTimeout) ||
4523             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4524                         cur_params.dot11MeshHoldingTimeout) ||
4525             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4526                         cur_params.dot11MeshMaxPeerLinks) ||
4527             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4528                        cur_params.dot11MeshMaxRetries) ||
4529             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4530                        cur_params.dot11MeshTTL) ||
4531             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4532                        cur_params.element_ttl) ||
4533             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4534                        cur_params.auto_open_plinks) ||
4535             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4536                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4537             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4538                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4539             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4540                         cur_params.path_refresh_time) ||
4541             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4542                         cur_params.min_discovery_timeout) ||
4543             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4544                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4545             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4546                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4547             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4548                         cur_params.dot11MeshHWMPperrMinInterval) ||
4549             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4550                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4551             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4552                        cur_params.dot11MeshHWMPRootMode) ||
4553             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4554                         cur_params.dot11MeshHWMPRannInterval) ||
4555             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4556                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4557             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4558                        cur_params.dot11MeshForwarding) ||
4559             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4560                         cur_params.rssi_threshold) ||
4561             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4562                         cur_params.ht_opmode) ||
4563             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4564                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4565             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4566                         cur_params.dot11MeshHWMProotInterval) ||
4567             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4568                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4569             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4570                         cur_params.power_mode) ||
4571             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4572                         cur_params.dot11MeshAwakeWindowDuration))
4573                 goto nla_put_failure;
4574         nla_nest_end(msg, pinfoattr);
4575         genlmsg_end(msg, hdr);
4576         return genlmsg_reply(msg, info);
4577
4578  nla_put_failure:
4579         genlmsg_cancel(msg, hdr);
4580  out:
4581         nlmsg_free(msg);
4582         return -ENOBUFS;
4583 }
4584
4585 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4586         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4587         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4588         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4589         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4590         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4591         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4592         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4593         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4594         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4595         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4596         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4597         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4598         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4599         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4600         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4601         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4602         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4603         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4604         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4605         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4606         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4607         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4608         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4609         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4610         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4611         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4612         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4613 };
4614
4615 static const struct nla_policy
4616         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4617         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4618         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4619         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4620         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4621         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4622         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4623                                     .len = IEEE80211_MAX_DATA_LEN },
4624         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4625 };
4626
4627 static int nl80211_parse_mesh_config(struct genl_info *info,
4628                                      struct mesh_config *cfg,
4629                                      u32 *mask_out)
4630 {
4631         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4632         u32 mask = 0;
4633
4634 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4635 do {                                                                        \
4636         if (tb[attr]) {                                                     \
4637                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4638                         return -EINVAL;                                     \
4639                 cfg->param = fn(tb[attr]);                                  \
4640                 mask |= (1 << (attr - 1));                                  \
4641         }                                                                   \
4642 } while (0)
4643
4644
4645         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4646                 return -EINVAL;
4647         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4648                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4649                              nl80211_meshconf_params_policy))
4650                 return -EINVAL;
4651
4652         /* This makes sure that there aren't more than 32 mesh config
4653          * parameters (otherwise our bitfield scheme would not work.) */
4654         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4655
4656         /* Fill in the params struct */
4657         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4658                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4659                                   nla_get_u16);
4660         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4661                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4662                                   nla_get_u16);
4663         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4664                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4665                                   nla_get_u16);
4666         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4667                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4668                                   nla_get_u16);
4669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4670                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4671                                   nla_get_u8);
4672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4673                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4674         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4675                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4676                                   nla_get_u8);
4677         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4678                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4679                                   nla_get_u8);
4680         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4681                                   1, 255, mask,
4682                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4683                                   nla_get_u32);
4684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4685                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4686                                   nla_get_u8);
4687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4688                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4689                                   nla_get_u32);
4690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4691                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4692                                   nla_get_u16);
4693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4694                                   1, 65535, mask,
4695                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4696                                   nla_get_u32);
4697         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4698                                   1, 65535, mask,
4699                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4700                                   nla_get_u16);
4701         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4702                                   1, 65535, mask,
4703                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4704                                   nla_get_u16);
4705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4706                                   dot11MeshHWMPnetDiameterTraversalTime,
4707                                   1, 65535, mask,
4708                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4709                                   nla_get_u16);
4710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4711                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4712                                   nla_get_u8);
4713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4714                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4715                                   nla_get_u16);
4716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4717                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4718                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4719                                   nla_get_u8);
4720         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4721                                   mask, NL80211_MESHCONF_FORWARDING,
4722                                   nla_get_u8);
4723         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4724                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4725                                   nla_get_u32);
4726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4727                                   mask, NL80211_MESHCONF_HT_OPMODE,
4728                                   nla_get_u16);
4729         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4730                                   1, 65535, mask,
4731                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4732                                   nla_get_u32);
4733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4734                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4735                                   nla_get_u16);
4736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4737                                   dot11MeshHWMPconfirmationInterval,
4738                                   1, 65535, mask,
4739                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4740                                   nla_get_u16);
4741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4742                                   NL80211_MESH_POWER_ACTIVE,
4743                                   NL80211_MESH_POWER_MAX,
4744                                   mask, NL80211_MESHCONF_POWER_MODE,
4745                                   nla_get_u32);
4746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4747                                   0, 65535, mask,
4748                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4749         if (mask_out)
4750                 *mask_out = mask;
4751
4752         return 0;
4753
4754 #undef FILL_IN_MESH_PARAM_IF_SET
4755 }
4756
4757 static int nl80211_parse_mesh_setup(struct genl_info *info,
4758                                      struct mesh_setup *setup)
4759 {
4760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4761         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4762
4763         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4764                 return -EINVAL;
4765         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4766                              info->attrs[NL80211_ATTR_MESH_SETUP],
4767                              nl80211_mesh_setup_params_policy))
4768                 return -EINVAL;
4769
4770         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4771                 setup->sync_method =
4772                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4773                  IEEE80211_SYNC_METHOD_VENDOR :
4774                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4775
4776         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4777                 setup->path_sel_proto =
4778                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4779                  IEEE80211_PATH_PROTOCOL_VENDOR :
4780                  IEEE80211_PATH_PROTOCOL_HWMP;
4781
4782         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4783                 setup->path_metric =
4784                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4785                  IEEE80211_PATH_METRIC_VENDOR :
4786                  IEEE80211_PATH_METRIC_AIRTIME;
4787
4788
4789         if (tb[NL80211_MESH_SETUP_IE]) {
4790                 struct nlattr *ieattr =
4791                         tb[NL80211_MESH_SETUP_IE];
4792                 if (!is_valid_ie_attr(ieattr))
4793                         return -EINVAL;
4794                 setup->ie = nla_data(ieattr);
4795                 setup->ie_len = nla_len(ieattr);
4796         }
4797         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4798             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4799                 return -EINVAL;
4800         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4801         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4802         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4803         if (setup->is_secure)
4804                 setup->user_mpm = true;
4805
4806         return 0;
4807 }
4808
4809 static int nl80211_update_mesh_config(struct sk_buff *skb,
4810                                       struct genl_info *info)
4811 {
4812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4813         struct net_device *dev = info->user_ptr[1];
4814         struct wireless_dev *wdev = dev->ieee80211_ptr;
4815         struct mesh_config cfg;
4816         u32 mask;
4817         int err;
4818
4819         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4820                 return -EOPNOTSUPP;
4821
4822         if (!rdev->ops->update_mesh_config)
4823                 return -EOPNOTSUPP;
4824
4825         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4826         if (err)
4827                 return err;
4828
4829         wdev_lock(wdev);
4830         if (!wdev->mesh_id_len)
4831                 err = -ENOLINK;
4832
4833         if (!err)
4834                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4835
4836         wdev_unlock(wdev);
4837
4838         return err;
4839 }
4840
4841 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4842 {
4843         const struct ieee80211_regdomain *regdom;
4844         struct sk_buff *msg;
4845         void *hdr = NULL;
4846         struct nlattr *nl_reg_rules;
4847         unsigned int i;
4848         int err = -EINVAL;
4849
4850         mutex_lock(&cfg80211_mutex);
4851
4852         if (!cfg80211_regdomain)
4853                 goto out;
4854
4855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4856         if (!msg) {
4857                 err = -ENOBUFS;
4858                 goto out;
4859         }
4860
4861         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4862                              NL80211_CMD_GET_REG);
4863         if (!hdr)
4864                 goto put_failure;
4865
4866         if (reg_last_request_cell_base() &&
4867             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4868                         NL80211_USER_REG_HINT_CELL_BASE))
4869                 goto nla_put_failure;
4870
4871         rcu_read_lock();
4872         regdom = rcu_dereference(cfg80211_regdomain);
4873
4874         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4875             (regdom->dfs_region &&
4876              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4877                 goto nla_put_failure_rcu;
4878
4879         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4880         if (!nl_reg_rules)
4881                 goto nla_put_failure_rcu;
4882
4883         for (i = 0; i < regdom->n_reg_rules; i++) {
4884                 struct nlattr *nl_reg_rule;
4885                 const struct ieee80211_reg_rule *reg_rule;
4886                 const struct ieee80211_freq_range *freq_range;
4887                 const struct ieee80211_power_rule *power_rule;
4888
4889                 reg_rule = &regdom->reg_rules[i];
4890                 freq_range = &reg_rule->freq_range;
4891                 power_rule = &reg_rule->power_rule;
4892
4893                 nl_reg_rule = nla_nest_start(msg, i);
4894                 if (!nl_reg_rule)
4895                         goto nla_put_failure_rcu;
4896
4897                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4898                                 reg_rule->flags) ||
4899                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4900                                 freq_range->start_freq_khz) ||
4901                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4902                                 freq_range->end_freq_khz) ||
4903                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4904                                 freq_range->max_bandwidth_khz) ||
4905                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4906                                 power_rule->max_antenna_gain) ||
4907                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4908                                 power_rule->max_eirp))
4909                         goto nla_put_failure_rcu;
4910
4911                 nla_nest_end(msg, nl_reg_rule);
4912         }
4913         rcu_read_unlock();
4914
4915         nla_nest_end(msg, nl_reg_rules);
4916
4917         genlmsg_end(msg, hdr);
4918         err = genlmsg_reply(msg, info);
4919         goto out;
4920
4921 nla_put_failure_rcu:
4922         rcu_read_unlock();
4923 nla_put_failure:
4924         genlmsg_cancel(msg, hdr);
4925 put_failure:
4926         nlmsg_free(msg);
4927         err = -EMSGSIZE;
4928 out:
4929         mutex_unlock(&cfg80211_mutex);
4930         return err;
4931 }
4932
4933 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4934 {
4935         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4936         struct nlattr *nl_reg_rule;
4937         char *alpha2 = NULL;
4938         int rem_reg_rules = 0, r = 0;
4939         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4940         u8 dfs_region = 0;
4941         struct ieee80211_regdomain *rd = NULL;
4942
4943         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4944                 return -EINVAL;
4945
4946         if (!info->attrs[NL80211_ATTR_REG_RULES])
4947                 return -EINVAL;
4948
4949         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4950
4951         if (info->attrs[NL80211_ATTR_DFS_REGION])
4952                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4953
4954         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4955                             rem_reg_rules) {
4956                 num_rules++;
4957                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4958                         return -EINVAL;
4959         }
4960
4961         size_of_regd = sizeof(struct ieee80211_regdomain) +
4962                        num_rules * sizeof(struct ieee80211_reg_rule);
4963
4964         rd = kzalloc(size_of_regd, GFP_KERNEL);
4965         if (!rd)
4966                 return -ENOMEM;
4967
4968         rd->n_reg_rules = num_rules;
4969         rd->alpha2[0] = alpha2[0];
4970         rd->alpha2[1] = alpha2[1];
4971
4972         /*
4973          * Disable DFS master mode if the DFS region was
4974          * not supported or known on this kernel.
4975          */
4976         if (reg_supported_dfs_region(dfs_region))
4977                 rd->dfs_region = dfs_region;
4978
4979         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4980                             rem_reg_rules) {
4981                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4982                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4983                           reg_rule_policy);
4984                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4985                 if (r)
4986                         goto bad_reg;
4987
4988                 rule_idx++;
4989
4990                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4991                         r = -EINVAL;
4992                         goto bad_reg;
4993                 }
4994         }
4995
4996         mutex_lock(&cfg80211_mutex);
4997
4998         r = set_regdom(rd);
4999         /* set_regdom took ownership */
5000         rd = NULL;
5001         mutex_unlock(&cfg80211_mutex);
5002
5003  bad_reg:
5004         kfree(rd);
5005         return r;
5006 }
5007
5008 static int validate_scan_freqs(struct nlattr *freqs)
5009 {
5010         struct nlattr *attr1, *attr2;
5011         int n_channels = 0, tmp1, tmp2;
5012
5013         nla_for_each_nested(attr1, freqs, tmp1) {
5014                 n_channels++;
5015                 /*
5016                  * Some hardware has a limited channel list for
5017                  * scanning, and it is pretty much nonsensical
5018                  * to scan for a channel twice, so disallow that
5019                  * and don't require drivers to check that the
5020                  * channel list they get isn't longer than what
5021                  * they can scan, as long as they can scan all
5022                  * the channels they registered at once.
5023                  */
5024                 nla_for_each_nested(attr2, freqs, tmp2)
5025                         if (attr1 != attr2 &&
5026                             nla_get_u32(attr1) == nla_get_u32(attr2))
5027                                 return 0;
5028         }
5029
5030         return n_channels;
5031 }
5032
5033 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5034 {
5035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5036         struct wireless_dev *wdev = info->user_ptr[1];
5037         struct cfg80211_scan_request *request;
5038         struct nlattr *attr;
5039         struct wiphy *wiphy;
5040         int err, tmp, n_ssids = 0, n_channels, i;
5041         size_t ie_len;
5042
5043         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5044                 return -EINVAL;
5045
5046         wiphy = &rdev->wiphy;
5047
5048         if (!rdev->ops->scan)
5049                 return -EOPNOTSUPP;
5050
5051         if (rdev->scan_req)
5052                 return -EBUSY;
5053
5054         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5055                 n_channels = validate_scan_freqs(
5056                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5057                 if (!n_channels)
5058                         return -EINVAL;
5059         } else {
5060                 enum ieee80211_band band;
5061                 n_channels = 0;
5062
5063                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5064                         if (wiphy->bands[band])
5065                                 n_channels += wiphy->bands[band]->n_channels;
5066         }
5067
5068         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5069                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5070                         n_ssids++;
5071
5072         if (n_ssids > wiphy->max_scan_ssids)
5073                 return -EINVAL;
5074
5075         if (info->attrs[NL80211_ATTR_IE])
5076                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5077         else
5078                 ie_len = 0;
5079
5080         if (ie_len > wiphy->max_scan_ie_len)
5081                 return -EINVAL;
5082
5083         request = kzalloc(sizeof(*request)
5084                         + sizeof(*request->ssids) * n_ssids
5085                         + sizeof(*request->channels) * n_channels
5086                         + ie_len, GFP_KERNEL);
5087         if (!request)
5088                 return -ENOMEM;
5089
5090         if (n_ssids)
5091                 request->ssids = (void *)&request->channels[n_channels];
5092         request->n_ssids = n_ssids;
5093         if (ie_len) {
5094                 if (request->ssids)
5095                         request->ie = (void *)(request->ssids + n_ssids);
5096                 else
5097                         request->ie = (void *)(request->channels + n_channels);
5098         }
5099
5100         i = 0;
5101         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5102                 /* user specified, bail out if channel not found */
5103                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5104                         struct ieee80211_channel *chan;
5105
5106                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5107
5108                         if (!chan) {
5109                                 err = -EINVAL;
5110                                 goto out_free;
5111                         }
5112
5113                         /* ignore disabled channels */
5114                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5115                                 continue;
5116
5117                         request->channels[i] = chan;
5118                         i++;
5119                 }
5120         } else {
5121                 enum ieee80211_band band;
5122
5123                 /* all channels */
5124                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5125                         int j;
5126                         if (!wiphy->bands[band])
5127                                 continue;
5128                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5129                                 struct ieee80211_channel *chan;
5130
5131                                 chan = &wiphy->bands[band]->channels[j];
5132
5133                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5134                                         continue;
5135
5136                                 request->channels[i] = chan;
5137                                 i++;
5138                         }
5139                 }
5140         }
5141
5142         if (!i) {
5143                 err = -EINVAL;
5144                 goto out_free;
5145         }
5146
5147         request->n_channels = i;
5148
5149         i = 0;
5150         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5151                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5152                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5153                                 err = -EINVAL;
5154                                 goto out_free;
5155                         }
5156                         request->ssids[i].ssid_len = nla_len(attr);
5157                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5158                         i++;
5159                 }
5160         }
5161
5162         if (info->attrs[NL80211_ATTR_IE]) {
5163                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5164                 memcpy((void *)request->ie,
5165                        nla_data(info->attrs[NL80211_ATTR_IE]),
5166                        request->ie_len);
5167         }
5168
5169         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5170                 if (wiphy->bands[i])
5171                         request->rates[i] =
5172                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5173
5174         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5175                 nla_for_each_nested(attr,
5176                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5177                                     tmp) {
5178                         enum ieee80211_band band = nla_type(attr);
5179
5180                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5181                                 err = -EINVAL;
5182                                 goto out_free;
5183                         }
5184                         err = ieee80211_get_ratemask(wiphy->bands[band],
5185                                                      nla_data(attr),
5186                                                      nla_len(attr),
5187                                                      &request->rates[band]);
5188                         if (err)
5189                                 goto out_free;
5190                 }
5191         }
5192
5193         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5194                 request->flags = nla_get_u32(
5195                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5196                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5197                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5198                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5199                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5200                         err = -EOPNOTSUPP;
5201                         goto out_free;
5202                 }
5203         }
5204
5205         request->no_cck =
5206                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5207
5208         request->wdev = wdev;
5209         request->wiphy = &rdev->wiphy;
5210         request->scan_start = jiffies;
5211
5212         rdev->scan_req = request;
5213         err = rdev_scan(rdev, request);
5214
5215         if (!err) {
5216                 nl80211_send_scan_start(rdev, wdev);
5217                 if (wdev->netdev)
5218                         dev_hold(wdev->netdev);
5219         } else {
5220  out_free:
5221                 rdev->scan_req = NULL;
5222                 kfree(request);
5223         }
5224
5225         return err;
5226 }
5227
5228 static int nl80211_start_sched_scan(struct sk_buff *skb,
5229                                     struct genl_info *info)
5230 {
5231         struct cfg80211_sched_scan_request *request;
5232         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5233         struct net_device *dev = info->user_ptr[1];
5234         struct nlattr *attr;
5235         struct wiphy *wiphy;
5236         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5237         u32 interval;
5238         enum ieee80211_band band;
5239         size_t ie_len;
5240         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5241
5242         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5243             !rdev->ops->sched_scan_start)
5244                 return -EOPNOTSUPP;
5245
5246         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5247                 return -EINVAL;
5248
5249         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5250                 return -EINVAL;
5251
5252         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5253         if (interval == 0)
5254                 return -EINVAL;
5255
5256         wiphy = &rdev->wiphy;
5257
5258         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5259                 n_channels = validate_scan_freqs(
5260                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5261                 if (!n_channels)
5262                         return -EINVAL;
5263         } else {
5264                 n_channels = 0;
5265
5266                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5267                         if (wiphy->bands[band])
5268                                 n_channels += wiphy->bands[band]->n_channels;
5269         }
5270
5271         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5272                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5273                                     tmp)
5274                         n_ssids++;
5275
5276         if (n_ssids > wiphy->max_sched_scan_ssids)
5277                 return -EINVAL;
5278
5279         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5280                 nla_for_each_nested(attr,
5281                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5282                                     tmp)
5283                         n_match_sets++;
5284
5285         if (n_match_sets > wiphy->max_match_sets)
5286                 return -EINVAL;
5287
5288         if (info->attrs[NL80211_ATTR_IE])
5289                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5290         else
5291                 ie_len = 0;
5292
5293         if (ie_len > wiphy->max_sched_scan_ie_len)
5294                 return -EINVAL;
5295
5296         mutex_lock(&rdev->sched_scan_mtx);
5297
5298         if (rdev->sched_scan_req) {
5299                 err = -EINPROGRESS;
5300                 goto out;
5301         }
5302
5303         request = kzalloc(sizeof(*request)
5304                         + sizeof(*request->ssids) * n_ssids
5305                         + sizeof(*request->match_sets) * n_match_sets
5306                         + sizeof(*request->channels) * n_channels
5307                         + ie_len, GFP_KERNEL);
5308         if (!request) {
5309                 err = -ENOMEM;
5310                 goto out;
5311         }
5312
5313         if (n_ssids)
5314                 request->ssids = (void *)&request->channels[n_channels];
5315         request->n_ssids = n_ssids;
5316         if (ie_len) {
5317                 if (request->ssids)
5318                         request->ie = (void *)(request->ssids + n_ssids);
5319                 else
5320                         request->ie = (void *)(request->channels + n_channels);
5321         }
5322
5323         if (n_match_sets) {
5324                 if (request->ie)
5325                         request->match_sets = (void *)(request->ie + ie_len);
5326                 else if (request->ssids)
5327                         request->match_sets =
5328                                 (void *)(request->ssids + n_ssids);
5329                 else
5330                         request->match_sets =
5331                                 (void *)(request->channels + n_channels);
5332         }
5333         request->n_match_sets = n_match_sets;
5334
5335         i = 0;
5336         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5337                 /* user specified, bail out if channel not found */
5338                 nla_for_each_nested(attr,
5339                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5340                                     tmp) {
5341                         struct ieee80211_channel *chan;
5342
5343                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5344
5345                         if (!chan) {
5346                                 err = -EINVAL;
5347                                 goto out_free;
5348                         }
5349
5350                         /* ignore disabled channels */
5351                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5352                                 continue;
5353
5354                         request->channels[i] = chan;
5355                         i++;
5356                 }
5357         } else {
5358                 /* all channels */
5359                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5360                         int j;
5361                         if (!wiphy->bands[band])
5362                                 continue;
5363                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5364                                 struct ieee80211_channel *chan;
5365
5366                                 chan = &wiphy->bands[band]->channels[j];
5367
5368                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5369                                         continue;
5370
5371                                 request->channels[i] = chan;
5372                                 i++;
5373                         }
5374                 }
5375         }
5376
5377         if (!i) {
5378                 err = -EINVAL;
5379                 goto out_free;
5380         }
5381
5382         request->n_channels = i;
5383
5384         i = 0;
5385         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5386                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5387                                     tmp) {
5388                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5389                                 err = -EINVAL;
5390                                 goto out_free;
5391                         }
5392                         request->ssids[i].ssid_len = nla_len(attr);
5393                         memcpy(request->ssids[i].ssid, nla_data(attr),
5394                                nla_len(attr));
5395                         i++;
5396                 }
5397         }
5398
5399         i = 0;
5400         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5401                 nla_for_each_nested(attr,
5402                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5403                                     tmp) {
5404                         struct nlattr *ssid, *rssi;
5405
5406                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5407                                   nla_data(attr), nla_len(attr),
5408                                   nl80211_match_policy);
5409                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5410                         if (ssid) {
5411                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5412                                         err = -EINVAL;
5413                                         goto out_free;
5414                                 }
5415                                 memcpy(request->match_sets[i].ssid.ssid,
5416                                        nla_data(ssid), nla_len(ssid));
5417                                 request->match_sets[i].ssid.ssid_len =
5418                                         nla_len(ssid);
5419                         }
5420                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5421                         if (rssi)
5422                                 request->rssi_thold = nla_get_u32(rssi);
5423                         else
5424                                 request->rssi_thold =
5425                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5426                         i++;
5427                 }
5428         }
5429
5430         if (info->attrs[NL80211_ATTR_IE]) {
5431                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5432                 memcpy((void *)request->ie,
5433                        nla_data(info->attrs[NL80211_ATTR_IE]),
5434                        request->ie_len);
5435         }
5436
5437         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5438                 request->flags = nla_get_u32(
5439                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5440                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5441                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5442                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5443                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5444                         err = -EOPNOTSUPP;
5445                         goto out_free;
5446                 }
5447         }
5448
5449         request->dev = dev;
5450         request->wiphy = &rdev->wiphy;
5451         request->interval = interval;
5452         request->scan_start = jiffies;
5453
5454         err = rdev_sched_scan_start(rdev, dev, request);
5455         if (!err) {
5456                 rdev->sched_scan_req = request;
5457                 nl80211_send_sched_scan(rdev, dev,
5458                                         NL80211_CMD_START_SCHED_SCAN);
5459                 goto out;
5460         }
5461
5462 out_free:
5463         kfree(request);
5464 out:
5465         mutex_unlock(&rdev->sched_scan_mtx);
5466         return err;
5467 }
5468
5469 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5470                                    struct genl_info *info)
5471 {
5472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5473         int err;
5474
5475         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5476             !rdev->ops->sched_scan_stop)
5477                 return -EOPNOTSUPP;
5478
5479         mutex_lock(&rdev->sched_scan_mtx);
5480         err = __cfg80211_stop_sched_scan(rdev, false);
5481         mutex_unlock(&rdev->sched_scan_mtx);
5482
5483         return err;
5484 }
5485
5486 static int nl80211_start_radar_detection(struct sk_buff *skb,
5487                                          struct genl_info *info)
5488 {
5489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5490         struct net_device *dev = info->user_ptr[1];
5491         struct wireless_dev *wdev = dev->ieee80211_ptr;
5492         struct cfg80211_chan_def chandef;
5493         int err;
5494
5495         err = nl80211_parse_chandef(rdev, info, &chandef);
5496         if (err)
5497                 return err;
5498
5499         if (wdev->cac_started)
5500                 return -EBUSY;
5501
5502         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5503         if (err < 0)
5504                 return err;
5505
5506         if (err == 0)
5507                 return -EINVAL;
5508
5509         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5510                 return -EINVAL;
5511
5512         if (!rdev->ops->start_radar_detection)
5513                 return -EOPNOTSUPP;
5514
5515         mutex_lock(&rdev->devlist_mtx);
5516         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5517                                            chandef.chan, CHAN_MODE_SHARED,
5518                                            BIT(chandef.width));
5519         if (err)
5520                 goto err_locked;
5521
5522         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5523         if (!err) {
5524                 wdev->channel = chandef.chan;
5525                 wdev->cac_started = true;
5526                 wdev->cac_start_time = jiffies;
5527         }
5528 err_locked:
5529         mutex_unlock(&rdev->devlist_mtx);
5530
5531         return err;
5532 }
5533
5534 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5535                             u32 seq, int flags,
5536                             struct cfg80211_registered_device *rdev,
5537                             struct wireless_dev *wdev,
5538                             struct cfg80211_internal_bss *intbss)
5539 {
5540         struct cfg80211_bss *res = &intbss->pub;
5541         const struct cfg80211_bss_ies *ies;
5542         void *hdr;
5543         struct nlattr *bss;
5544         bool tsf = false;
5545
5546         ASSERT_WDEV_LOCK(wdev);
5547
5548         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5549                              NL80211_CMD_NEW_SCAN_RESULTS);
5550         if (!hdr)
5551                 return -1;
5552
5553         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5554
5555         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5556             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5557                 goto nla_put_failure;
5558
5559         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5560         if (!bss)
5561                 goto nla_put_failure;
5562         if ((!is_zero_ether_addr(res->bssid) &&
5563              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5564                 goto nla_put_failure;
5565
5566         rcu_read_lock();
5567         ies = rcu_dereference(res->ies);
5568         if (ies) {
5569                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5570                         goto fail_unlock_rcu;
5571                 tsf = true;
5572                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5573                                         ies->len, ies->data))
5574                         goto fail_unlock_rcu;
5575         }
5576         ies = rcu_dereference(res->beacon_ies);
5577         if (ies) {
5578                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5579                         goto fail_unlock_rcu;
5580                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5581                                         ies->len, ies->data))
5582                         goto fail_unlock_rcu;
5583         }
5584         rcu_read_unlock();
5585
5586         if (res->beacon_interval &&
5587             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5588                 goto nla_put_failure;
5589         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5590             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5591             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5592                         jiffies_to_msecs(jiffies - intbss->ts)))
5593                 goto nla_put_failure;
5594
5595         switch (rdev->wiphy.signal_type) {
5596         case CFG80211_SIGNAL_TYPE_MBM:
5597                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5598                         goto nla_put_failure;
5599                 break;
5600         case CFG80211_SIGNAL_TYPE_UNSPEC:
5601                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5602                         goto nla_put_failure;
5603                 break;
5604         default:
5605                 break;
5606         }
5607
5608         switch (wdev->iftype) {
5609         case NL80211_IFTYPE_P2P_CLIENT:
5610         case NL80211_IFTYPE_STATION:
5611                 if (intbss == wdev->current_bss &&
5612                     nla_put_u32(msg, NL80211_BSS_STATUS,
5613                                 NL80211_BSS_STATUS_ASSOCIATED))
5614                         goto nla_put_failure;
5615                 break;
5616         case NL80211_IFTYPE_ADHOC:
5617                 if (intbss == wdev->current_bss &&
5618                     nla_put_u32(msg, NL80211_BSS_STATUS,
5619                                 NL80211_BSS_STATUS_IBSS_JOINED))
5620                         goto nla_put_failure;
5621                 break;
5622         default:
5623                 break;
5624         }
5625
5626         nla_nest_end(msg, bss);
5627
5628         return genlmsg_end(msg, hdr);
5629
5630  fail_unlock_rcu:
5631         rcu_read_unlock();
5632  nla_put_failure:
5633         genlmsg_cancel(msg, hdr);
5634         return -EMSGSIZE;
5635 }
5636
5637 static int nl80211_dump_scan(struct sk_buff *skb,
5638                              struct netlink_callback *cb)
5639 {
5640         struct cfg80211_registered_device *rdev;
5641         struct net_device *dev;
5642         struct cfg80211_internal_bss *scan;
5643         struct wireless_dev *wdev;
5644         int start = cb->args[1], idx = 0;
5645         int err;
5646
5647         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5648         if (err)
5649                 return err;
5650
5651         wdev = dev->ieee80211_ptr;
5652
5653         wdev_lock(wdev);
5654         spin_lock_bh(&rdev->bss_lock);
5655         cfg80211_bss_expire(rdev);
5656
5657         cb->seq = rdev->bss_generation;
5658
5659         list_for_each_entry(scan, &rdev->bss_list, list) {
5660                 if (++idx <= start)
5661                         continue;
5662                 if (nl80211_send_bss(skb, cb,
5663                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5664                                 rdev, wdev, scan) < 0) {
5665                         idx--;
5666                         break;
5667                 }
5668         }
5669
5670         spin_unlock_bh(&rdev->bss_lock);
5671         wdev_unlock(wdev);
5672
5673         cb->args[1] = idx;
5674         nl80211_finish_netdev_dump(rdev);
5675
5676         return skb->len;
5677 }
5678
5679 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5680                                 int flags, struct net_device *dev,
5681                                 struct survey_info *survey)
5682 {
5683         void *hdr;
5684         struct nlattr *infoattr;
5685
5686         hdr = nl80211hdr_put(msg, portid, seq, flags,
5687                              NL80211_CMD_NEW_SURVEY_RESULTS);
5688         if (!hdr)
5689                 return -ENOMEM;
5690
5691         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5692                 goto nla_put_failure;
5693
5694         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5695         if (!infoattr)
5696                 goto nla_put_failure;
5697
5698         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5699                         survey->channel->center_freq))
5700                 goto nla_put_failure;
5701
5702         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5703             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5704                 goto nla_put_failure;
5705         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5706             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5707                 goto nla_put_failure;
5708         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5709             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5710                         survey->channel_time))
5711                 goto nla_put_failure;
5712         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5713             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5714                         survey->channel_time_busy))
5715                 goto nla_put_failure;
5716         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5717             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5718                         survey->channel_time_ext_busy))
5719                 goto nla_put_failure;
5720         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5721             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5722                         survey->channel_time_rx))
5723                 goto nla_put_failure;
5724         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5725             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5726                         survey->channel_time_tx))
5727                 goto nla_put_failure;
5728
5729         nla_nest_end(msg, infoattr);
5730
5731         return genlmsg_end(msg, hdr);
5732
5733  nla_put_failure:
5734         genlmsg_cancel(msg, hdr);
5735         return -EMSGSIZE;
5736 }
5737
5738 static int nl80211_dump_survey(struct sk_buff *skb,
5739                         struct netlink_callback *cb)
5740 {
5741         struct survey_info survey;
5742         struct cfg80211_registered_device *dev;
5743         struct net_device *netdev;
5744         int survey_idx = cb->args[1];
5745         int res;
5746
5747         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5748         if (res)
5749                 return res;
5750
5751         if (!dev->ops->dump_survey) {
5752                 res = -EOPNOTSUPP;
5753                 goto out_err;
5754         }
5755
5756         while (1) {
5757                 struct ieee80211_channel *chan;
5758
5759                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5760                 if (res == -ENOENT)
5761                         break;
5762                 if (res)
5763                         goto out_err;
5764
5765                 /* Survey without a channel doesn't make sense */
5766                 if (!survey.channel) {
5767                         res = -EINVAL;
5768                         goto out;
5769                 }
5770
5771                 chan = ieee80211_get_channel(&dev->wiphy,
5772                                              survey.channel->center_freq);
5773                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5774                         survey_idx++;
5775                         continue;
5776                 }
5777
5778                 if (nl80211_send_survey(skb,
5779                                 NETLINK_CB(cb->skb).portid,
5780                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5781                                 netdev,
5782                                 &survey) < 0)
5783                         goto out;
5784                 survey_idx++;
5785         }
5786
5787  out:
5788         cb->args[1] = survey_idx;
5789         res = skb->len;
5790  out_err:
5791         nl80211_finish_netdev_dump(dev);
5792         return res;
5793 }
5794
5795 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5796 {
5797         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5798                                   NL80211_WPA_VERSION_2));
5799 }
5800
5801 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5802 {
5803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5804         struct net_device *dev = info->user_ptr[1];
5805         struct ieee80211_channel *chan;
5806         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5807         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5808         enum nl80211_auth_type auth_type;
5809         struct key_parse key;
5810         bool local_state_change;
5811
5812         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5813                 return -EINVAL;
5814
5815         if (!info->attrs[NL80211_ATTR_MAC])
5816                 return -EINVAL;
5817
5818         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5819                 return -EINVAL;
5820
5821         if (!info->attrs[NL80211_ATTR_SSID])
5822                 return -EINVAL;
5823
5824         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5825                 return -EINVAL;
5826
5827         err = nl80211_parse_key(info, &key);
5828         if (err)
5829                 return err;
5830
5831         if (key.idx >= 0) {
5832                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5833                         return -EINVAL;
5834                 if (!key.p.key || !key.p.key_len)
5835                         return -EINVAL;
5836                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5837                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5838                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5839                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5840                         return -EINVAL;
5841                 if (key.idx > 4)
5842                         return -EINVAL;
5843         } else {
5844                 key.p.key_len = 0;
5845                 key.p.key = NULL;
5846         }
5847
5848         if (key.idx >= 0) {
5849                 int i;
5850                 bool ok = false;
5851                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5852                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5853                                 ok = true;
5854                                 break;
5855                         }
5856                 }
5857                 if (!ok)
5858                         return -EINVAL;
5859         }
5860
5861         if (!rdev->ops->auth)
5862                 return -EOPNOTSUPP;
5863
5864         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5865             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5866                 return -EOPNOTSUPP;
5867
5868         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5869         chan = ieee80211_get_channel(&rdev->wiphy,
5870                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5871         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5872                 return -EINVAL;
5873
5874         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5875         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5876
5877         if (info->attrs[NL80211_ATTR_IE]) {
5878                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5879                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5880         }
5881
5882         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5883         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5884                 return -EINVAL;
5885
5886         if (auth_type == NL80211_AUTHTYPE_SAE &&
5887             !info->attrs[NL80211_ATTR_SAE_DATA])
5888                 return -EINVAL;
5889
5890         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5891                 if (auth_type != NL80211_AUTHTYPE_SAE)
5892                         return -EINVAL;
5893                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5894                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5895                 /* need to include at least Auth Transaction and Status Code */
5896                 if (sae_data_len < 4)
5897                         return -EINVAL;
5898         }
5899
5900         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5901
5902         /*
5903          * Since we no longer track auth state, ignore
5904          * requests to only change local state.
5905          */
5906         if (local_state_change)
5907                 return 0;
5908
5909         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5910                                   ssid, ssid_len, ie, ie_len,
5911                                   key.p.key, key.p.key_len, key.idx,
5912                                   sae_data, sae_data_len);
5913 }
5914
5915 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5916                                    struct genl_info *info,
5917                                    struct cfg80211_crypto_settings *settings,
5918                                    int cipher_limit)
5919 {
5920         memset(settings, 0, sizeof(*settings));
5921
5922         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5923
5924         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5925                 u16 proto;
5926                 proto = nla_get_u16(
5927                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5928                 settings->control_port_ethertype = cpu_to_be16(proto);
5929                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5930                     proto != ETH_P_PAE)
5931                         return -EINVAL;
5932                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5933                         settings->control_port_no_encrypt = true;
5934         } else
5935                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5936
5937         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5938                 void *data;
5939                 int len, i;
5940
5941                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5942                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5943                 settings->n_ciphers_pairwise = len / sizeof(u32);
5944
5945                 if (len % sizeof(u32))
5946                         return -EINVAL;
5947
5948                 if (settings->n_ciphers_pairwise > cipher_limit)
5949                         return -EINVAL;
5950
5951                 memcpy(settings->ciphers_pairwise, data, len);
5952
5953                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5954                         if (!cfg80211_supported_cipher_suite(
5955                                         &rdev->wiphy,
5956                                         settings->ciphers_pairwise[i]))
5957                                 return -EINVAL;
5958         }
5959
5960         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5961                 settings->cipher_group =
5962                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5963                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5964                                                      settings->cipher_group))
5965                         return -EINVAL;
5966         }
5967
5968         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5969                 settings->wpa_versions =
5970                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5971                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5972                         return -EINVAL;
5973         }
5974
5975         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5976                 void *data;
5977                 int len;
5978
5979                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5980                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5981                 settings->n_akm_suites = len / sizeof(u32);
5982
5983                 if (len % sizeof(u32))
5984                         return -EINVAL;
5985
5986                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5987                         return -EINVAL;
5988
5989                 memcpy(settings->akm_suites, data, len);
5990         }
5991
5992         return 0;
5993 }
5994
5995 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5996 {
5997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5998         struct net_device *dev = info->user_ptr[1];
5999         struct ieee80211_channel *chan;
6000         struct cfg80211_assoc_request req = {};
6001         const u8 *bssid, *ssid;
6002         int err, ssid_len = 0;
6003
6004         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6005                 return -EINVAL;
6006
6007         if (!info->attrs[NL80211_ATTR_MAC] ||
6008             !info->attrs[NL80211_ATTR_SSID] ||
6009             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6010                 return -EINVAL;
6011
6012         if (!rdev->ops->assoc)
6013                 return -EOPNOTSUPP;
6014
6015         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6016             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6017                 return -EOPNOTSUPP;
6018
6019         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6020
6021         chan = ieee80211_get_channel(&rdev->wiphy,
6022                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6023         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6024                 return -EINVAL;
6025
6026         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6027         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6028
6029         if (info->attrs[NL80211_ATTR_IE]) {
6030                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6031                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6032         }
6033
6034         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6035                 enum nl80211_mfp mfp =
6036                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6037                 if (mfp == NL80211_MFP_REQUIRED)
6038                         req.use_mfp = true;
6039                 else if (mfp != NL80211_MFP_NO)
6040                         return -EINVAL;
6041         }
6042
6043         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6044                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6045
6046         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6047                 req.flags |= ASSOC_REQ_DISABLE_HT;
6048
6049         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6050                 memcpy(&req.ht_capa_mask,
6051                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6052                        sizeof(req.ht_capa_mask));
6053
6054         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6055                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6056                         return -EINVAL;
6057                 memcpy(&req.ht_capa,
6058                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6059                        sizeof(req.ht_capa));
6060         }
6061
6062         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6063                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6064
6065         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6066                 memcpy(&req.vht_capa_mask,
6067                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6068                        sizeof(req.vht_capa_mask));
6069
6070         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6071                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6072                         return -EINVAL;
6073                 memcpy(&req.vht_capa,
6074                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6075                        sizeof(req.vht_capa));
6076         }
6077
6078         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6079         if (!err)
6080                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6081                                           ssid, ssid_len, &req);
6082
6083         return err;
6084 }
6085
6086 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6087 {
6088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6089         struct net_device *dev = info->user_ptr[1];
6090         const u8 *ie = NULL, *bssid;
6091         int ie_len = 0;
6092         u16 reason_code;
6093         bool local_state_change;
6094
6095         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6096                 return -EINVAL;
6097
6098         if (!info->attrs[NL80211_ATTR_MAC])
6099                 return -EINVAL;
6100
6101         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6102                 return -EINVAL;
6103
6104         if (!rdev->ops->deauth)
6105                 return -EOPNOTSUPP;
6106
6107         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6108             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6109                 return -EOPNOTSUPP;
6110
6111         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6112
6113         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6114         if (reason_code == 0) {
6115                 /* Reason Code 0 is reserved */
6116                 return -EINVAL;
6117         }
6118
6119         if (info->attrs[NL80211_ATTR_IE]) {
6120                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6121                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6122         }
6123
6124         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6125
6126         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6127                                     local_state_change);
6128 }
6129
6130 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6131 {
6132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6133         struct net_device *dev = info->user_ptr[1];
6134         const u8 *ie = NULL, *bssid;
6135         int ie_len = 0;
6136         u16 reason_code;
6137         bool local_state_change;
6138
6139         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6140                 return -EINVAL;
6141
6142         if (!info->attrs[NL80211_ATTR_MAC])
6143                 return -EINVAL;
6144
6145         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6146                 return -EINVAL;
6147
6148         if (!rdev->ops->disassoc)
6149                 return -EOPNOTSUPP;
6150
6151         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6152             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6153                 return -EOPNOTSUPP;
6154
6155         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6156
6157         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6158         if (reason_code == 0) {
6159                 /* Reason Code 0 is reserved */
6160                 return -EINVAL;
6161         }
6162
6163         if (info->attrs[NL80211_ATTR_IE]) {
6164                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6165                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6166         }
6167
6168         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6169
6170         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6171                                       local_state_change);
6172 }
6173
6174 static bool
6175 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6176                          int mcast_rate[IEEE80211_NUM_BANDS],
6177                          int rateval)
6178 {
6179         struct wiphy *wiphy = &rdev->wiphy;
6180         bool found = false;
6181         int band, i;
6182
6183         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6184                 struct ieee80211_supported_band *sband;
6185
6186                 sband = wiphy->bands[band];
6187                 if (!sband)
6188                         continue;
6189
6190                 for (i = 0; i < sband->n_bitrates; i++) {
6191                         if (sband->bitrates[i].bitrate == rateval) {
6192                                 mcast_rate[band] = i + 1;
6193                                 found = true;
6194                                 break;
6195                         }
6196                 }
6197         }
6198
6199         return found;
6200 }
6201
6202 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6203 {
6204         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6205         struct net_device *dev = info->user_ptr[1];
6206         struct cfg80211_ibss_params ibss;
6207         struct wiphy *wiphy;
6208         struct cfg80211_cached_keys *connkeys = NULL;
6209         int err;
6210
6211         memset(&ibss, 0, sizeof(ibss));
6212
6213         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6214                 return -EINVAL;
6215
6216         if (!info->attrs[NL80211_ATTR_SSID] ||
6217             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6218                 return -EINVAL;
6219
6220         ibss.beacon_interval = 100;
6221
6222         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6223                 ibss.beacon_interval =
6224                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6225                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6226                         return -EINVAL;
6227         }
6228
6229         if (!rdev->ops->join_ibss)
6230                 return -EOPNOTSUPP;
6231
6232         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6233                 return -EOPNOTSUPP;
6234
6235         wiphy = &rdev->wiphy;
6236
6237         if (info->attrs[NL80211_ATTR_MAC]) {
6238                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6239
6240                 if (!is_valid_ether_addr(ibss.bssid))
6241                         return -EINVAL;
6242         }
6243         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6244         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6245
6246         if (info->attrs[NL80211_ATTR_IE]) {
6247                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6248                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6249         }
6250
6251         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6252         if (err)
6253                 return err;
6254
6255         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6256                 return -EINVAL;
6257
6258         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6259                 return -EINVAL;
6260         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6261             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6262                 return -EINVAL;
6263
6264         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6265         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6266
6267         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6268                 u8 *rates =
6269                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6270                 int n_rates =
6271                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6272                 struct ieee80211_supported_band *sband =
6273                         wiphy->bands[ibss.chandef.chan->band];
6274
6275                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6276                                              &ibss.basic_rates);
6277                 if (err)
6278                         return err;
6279         }
6280
6281         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6282             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6283                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6284                 return -EINVAL;
6285
6286         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6287                 bool no_ht = false;
6288
6289                 connkeys = nl80211_parse_connkeys(rdev,
6290                                           info->attrs[NL80211_ATTR_KEYS],
6291                                           &no_ht);
6292                 if (IS_ERR(connkeys))
6293                         return PTR_ERR(connkeys);
6294
6295                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6296                     no_ht) {
6297                         kfree(connkeys);
6298                         return -EINVAL;
6299                 }
6300         }
6301
6302         ibss.control_port =
6303                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6304
6305         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6306         if (err)
6307                 kfree(connkeys);
6308         return err;
6309 }
6310
6311 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6312 {
6313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6314         struct net_device *dev = info->user_ptr[1];
6315
6316         if (!rdev->ops->leave_ibss)
6317                 return -EOPNOTSUPP;
6318
6319         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6320                 return -EOPNOTSUPP;
6321
6322         return cfg80211_leave_ibss(rdev, dev, false);
6323 }
6324
6325 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6326 {
6327         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6328         struct net_device *dev = info->user_ptr[1];
6329         int mcast_rate[IEEE80211_NUM_BANDS];
6330         u32 nla_rate;
6331         int err;
6332
6333         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6334             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6335                 return -EOPNOTSUPP;
6336
6337         if (!rdev->ops->set_mcast_rate)
6338                 return -EOPNOTSUPP;
6339
6340         memset(mcast_rate, 0, sizeof(mcast_rate));
6341
6342         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6343                 return -EINVAL;
6344
6345         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6346         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6347                 return -EINVAL;
6348
6349         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6350
6351         return err;
6352 }
6353
6354
6355 #ifdef CONFIG_NL80211_TESTMODE
6356 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6357         .name = "testmode",
6358 };
6359
6360 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6361 {
6362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6363         int err;
6364
6365         if (!info->attrs[NL80211_ATTR_TESTDATA])
6366                 return -EINVAL;
6367
6368         err = -EOPNOTSUPP;
6369         if (rdev->ops->testmode_cmd) {
6370                 rdev->testmode_info = info;
6371                 err = rdev_testmode_cmd(rdev,
6372                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6373                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6374                 rdev->testmode_info = NULL;
6375         }
6376
6377         return err;
6378 }
6379
6380 static int nl80211_testmode_dump(struct sk_buff *skb,
6381                                  struct netlink_callback *cb)
6382 {
6383         struct cfg80211_registered_device *rdev;
6384         int err;
6385         long phy_idx;
6386         void *data = NULL;
6387         int data_len = 0;
6388
6389         if (cb->args[0]) {
6390                 /*
6391                  * 0 is a valid index, but not valid for args[0],
6392                  * so we need to offset by 1.
6393                  */
6394                 phy_idx = cb->args[0] - 1;
6395         } else {
6396                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6397                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6398                                   nl80211_policy);
6399                 if (err)
6400                         return err;
6401
6402                 mutex_lock(&cfg80211_mutex);
6403                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6404                                                   nl80211_fam.attrbuf);
6405                 if (IS_ERR(rdev)) {
6406                         mutex_unlock(&cfg80211_mutex);
6407                         return PTR_ERR(rdev);
6408                 }
6409                 phy_idx = rdev->wiphy_idx;
6410                 rdev = NULL;
6411                 mutex_unlock(&cfg80211_mutex);
6412
6413                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6414                         cb->args[1] =
6415                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6416         }
6417
6418         if (cb->args[1]) {
6419                 data = nla_data((void *)cb->args[1]);
6420                 data_len = nla_len((void *)cb->args[1]);
6421         }
6422
6423         mutex_lock(&cfg80211_mutex);
6424         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6425         if (!rdev) {
6426                 mutex_unlock(&cfg80211_mutex);
6427                 return -ENOENT;
6428         }
6429         cfg80211_lock_rdev(rdev);
6430         mutex_unlock(&cfg80211_mutex);
6431
6432         if (!rdev->ops->testmode_dump) {
6433                 err = -EOPNOTSUPP;
6434                 goto out_err;
6435         }
6436
6437         while (1) {
6438                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6439                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6440                                            NL80211_CMD_TESTMODE);
6441                 struct nlattr *tmdata;
6442
6443                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6444                         genlmsg_cancel(skb, hdr);
6445                         break;
6446                 }
6447
6448                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6449                 if (!tmdata) {
6450                         genlmsg_cancel(skb, hdr);
6451                         break;
6452                 }
6453                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6454                 nla_nest_end(skb, tmdata);
6455
6456                 if (err == -ENOBUFS || err == -ENOENT) {
6457                         genlmsg_cancel(skb, hdr);
6458                         break;
6459                 } else if (err) {
6460                         genlmsg_cancel(skb, hdr);
6461                         goto out_err;
6462                 }
6463
6464                 genlmsg_end(skb, hdr);
6465         }
6466
6467         err = skb->len;
6468         /* see above */
6469         cb->args[0] = phy_idx + 1;
6470  out_err:
6471         cfg80211_unlock_rdev(rdev);
6472         return err;
6473 }
6474
6475 static struct sk_buff *
6476 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6477                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6478 {
6479         struct sk_buff *skb;
6480         void *hdr;
6481         struct nlattr *data;
6482
6483         skb = nlmsg_new(approxlen + 100, gfp);
6484         if (!skb)
6485                 return NULL;
6486
6487         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6488         if (!hdr) {
6489                 kfree_skb(skb);
6490                 return NULL;
6491         }
6492
6493         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6494                 goto nla_put_failure;
6495         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6496
6497         ((void **)skb->cb)[0] = rdev;
6498         ((void **)skb->cb)[1] = hdr;
6499         ((void **)skb->cb)[2] = data;
6500
6501         return skb;
6502
6503  nla_put_failure:
6504         kfree_skb(skb);
6505         return NULL;
6506 }
6507
6508 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6509                                                   int approxlen)
6510 {
6511         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6512
6513         if (WARN_ON(!rdev->testmode_info))
6514                 return NULL;
6515
6516         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6517                                 rdev->testmode_info->snd_portid,
6518                                 rdev->testmode_info->snd_seq,
6519                                 GFP_KERNEL);
6520 }
6521 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6522
6523 int cfg80211_testmode_reply(struct sk_buff *skb)
6524 {
6525         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6526         void *hdr = ((void **)skb->cb)[1];
6527         struct nlattr *data = ((void **)skb->cb)[2];
6528
6529         if (WARN_ON(!rdev->testmode_info)) {
6530                 kfree_skb(skb);
6531                 return -EINVAL;
6532         }
6533
6534         nla_nest_end(skb, data);
6535         genlmsg_end(skb, hdr);
6536         return genlmsg_reply(skb, rdev->testmode_info);
6537 }
6538 EXPORT_SYMBOL(cfg80211_testmode_reply);
6539
6540 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6541                                                   int approxlen, gfp_t gfp)
6542 {
6543         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6544
6545         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6546 }
6547 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6548
6549 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6550 {
6551         void *hdr = ((void **)skb->cb)[1];
6552         struct nlattr *data = ((void **)skb->cb)[2];
6553
6554         nla_nest_end(skb, data);
6555         genlmsg_end(skb, hdr);
6556         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6557 }
6558 EXPORT_SYMBOL(cfg80211_testmode_event);
6559 #endif
6560
6561 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6562 {
6563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6564         struct net_device *dev = info->user_ptr[1];
6565         struct cfg80211_connect_params connect;
6566         struct wiphy *wiphy;
6567         struct cfg80211_cached_keys *connkeys = NULL;
6568         int err;
6569
6570         memset(&connect, 0, sizeof(connect));
6571
6572         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6573                 return -EINVAL;
6574
6575         if (!info->attrs[NL80211_ATTR_SSID] ||
6576             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6577                 return -EINVAL;
6578
6579         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6580                 connect.auth_type =
6581                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6582                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6583                                              NL80211_CMD_CONNECT))
6584                         return -EINVAL;
6585         } else
6586                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6587
6588         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6589
6590         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6591                                       NL80211_MAX_NR_CIPHER_SUITES);
6592         if (err)
6593                 return err;
6594
6595         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6596             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6597                 return -EOPNOTSUPP;
6598
6599         wiphy = &rdev->wiphy;
6600
6601         connect.bg_scan_period = -1;
6602         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6603                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6604                 connect.bg_scan_period =
6605                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6606         }
6607
6608         if (info->attrs[NL80211_ATTR_MAC])
6609                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6610         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6611         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6612
6613         if (info->attrs[NL80211_ATTR_IE]) {
6614                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6615                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6616         }
6617
6618         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6619                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6620                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6621                     connect.mfp != NL80211_MFP_NO)
6622                         return -EINVAL;
6623         } else {
6624                 connect.mfp = NL80211_MFP_NO;
6625         }
6626
6627         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6628                 connect.channel =
6629                         ieee80211_get_channel(wiphy,
6630                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6631                 if (!connect.channel ||
6632                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6633                         return -EINVAL;
6634         }
6635
6636         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6637                 connkeys = nl80211_parse_connkeys(rdev,
6638                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6639                 if (IS_ERR(connkeys))
6640                         return PTR_ERR(connkeys);
6641         }
6642
6643         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6644                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6645
6646         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6647                 memcpy(&connect.ht_capa_mask,
6648                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6649                        sizeof(connect.ht_capa_mask));
6650
6651         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6652                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6653                         kfree(connkeys);
6654                         return -EINVAL;
6655                 }
6656                 memcpy(&connect.ht_capa,
6657                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6658                        sizeof(connect.ht_capa));
6659         }
6660
6661         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6662                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6663
6664         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6665                 memcpy(&connect.vht_capa_mask,
6666                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6667                        sizeof(connect.vht_capa_mask));
6668
6669         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6670                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6671                         kfree(connkeys);
6672                         return -EINVAL;
6673                 }
6674                 memcpy(&connect.vht_capa,
6675                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6676                        sizeof(connect.vht_capa));
6677         }
6678
6679         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6680         if (err)
6681                 kfree(connkeys);
6682         return err;
6683 }
6684
6685 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6686 {
6687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6688         struct net_device *dev = info->user_ptr[1];
6689         u16 reason;
6690
6691         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6692                 reason = WLAN_REASON_DEAUTH_LEAVING;
6693         else
6694                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6695
6696         if (reason == 0)
6697                 return -EINVAL;
6698
6699         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6700             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6701                 return -EOPNOTSUPP;
6702
6703         return cfg80211_disconnect(rdev, dev, reason, true);
6704 }
6705
6706 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6707 {
6708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6709         struct net *net;
6710         int err;
6711         u32 pid;
6712
6713         if (!info->attrs[NL80211_ATTR_PID])
6714                 return -EINVAL;
6715
6716         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6717
6718         net = get_net_ns_by_pid(pid);
6719         if (IS_ERR(net))
6720                 return PTR_ERR(net);
6721
6722         err = 0;
6723
6724         /* check if anything to do */
6725         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6726                 err = cfg80211_switch_netns(rdev, net);
6727
6728         put_net(net);
6729         return err;
6730 }
6731
6732 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6733 {
6734         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6735         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6736                         struct cfg80211_pmksa *pmksa) = NULL;
6737         struct net_device *dev = info->user_ptr[1];
6738         struct cfg80211_pmksa pmksa;
6739
6740         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6741
6742         if (!info->attrs[NL80211_ATTR_MAC])
6743                 return -EINVAL;
6744
6745         if (!info->attrs[NL80211_ATTR_PMKID])
6746                 return -EINVAL;
6747
6748         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6749         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6750
6751         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6752             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6753                 return -EOPNOTSUPP;
6754
6755         switch (info->genlhdr->cmd) {
6756         case NL80211_CMD_SET_PMKSA:
6757                 rdev_ops = rdev->ops->set_pmksa;
6758                 break;
6759         case NL80211_CMD_DEL_PMKSA:
6760                 rdev_ops = rdev->ops->del_pmksa;
6761                 break;
6762         default:
6763                 WARN_ON(1);
6764                 break;
6765         }
6766
6767         if (!rdev_ops)
6768                 return -EOPNOTSUPP;
6769
6770         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6771 }
6772
6773 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6774 {
6775         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6776         struct net_device *dev = info->user_ptr[1];
6777
6778         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6779             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6780                 return -EOPNOTSUPP;
6781
6782         if (!rdev->ops->flush_pmksa)
6783                 return -EOPNOTSUPP;
6784
6785         return rdev_flush_pmksa(rdev, dev);
6786 }
6787
6788 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6789 {
6790         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6791         struct net_device *dev = info->user_ptr[1];
6792         u8 action_code, dialog_token;
6793         u16 status_code;
6794         u8 *peer;
6795
6796         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6797             !rdev->ops->tdls_mgmt)
6798                 return -EOPNOTSUPP;
6799
6800         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6801             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6802             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6803             !info->attrs[NL80211_ATTR_IE] ||
6804             !info->attrs[NL80211_ATTR_MAC])
6805                 return -EINVAL;
6806
6807         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6808         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6809         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6810         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6811
6812         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6813                               dialog_token, status_code,
6814                               nla_data(info->attrs[NL80211_ATTR_IE]),
6815                               nla_len(info->attrs[NL80211_ATTR_IE]));
6816 }
6817
6818 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6819 {
6820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6821         struct net_device *dev = info->user_ptr[1];
6822         enum nl80211_tdls_operation operation;
6823         u8 *peer;
6824
6825         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6826             !rdev->ops->tdls_oper)
6827                 return -EOPNOTSUPP;
6828
6829         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6830             !info->attrs[NL80211_ATTR_MAC])
6831                 return -EINVAL;
6832
6833         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6834         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6835
6836         return rdev_tdls_oper(rdev, dev, peer, operation);
6837 }
6838
6839 static int nl80211_remain_on_channel(struct sk_buff *skb,
6840                                      struct genl_info *info)
6841 {
6842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6843         struct wireless_dev *wdev = info->user_ptr[1];
6844         struct cfg80211_chan_def chandef;
6845         struct sk_buff *msg;
6846         void *hdr;
6847         u64 cookie;
6848         u32 duration;
6849         int err;
6850
6851         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6852             !info->attrs[NL80211_ATTR_DURATION])
6853                 return -EINVAL;
6854
6855         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6856
6857         if (!rdev->ops->remain_on_channel ||
6858             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6859                 return -EOPNOTSUPP;
6860
6861         /*
6862          * We should be on that channel for at least a minimum amount of
6863          * time (10ms) but no longer than the driver supports.
6864          */
6865         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6866             duration > rdev->wiphy.max_remain_on_channel_duration)
6867                 return -EINVAL;
6868
6869         err = nl80211_parse_chandef(rdev, info, &chandef);
6870         if (err)
6871                 return err;
6872
6873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6874         if (!msg)
6875                 return -ENOMEM;
6876
6877         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6878                              NL80211_CMD_REMAIN_ON_CHANNEL);
6879
6880         if (IS_ERR(hdr)) {
6881                 err = PTR_ERR(hdr);
6882                 goto free_msg;
6883         }
6884
6885         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6886                                      duration, &cookie);
6887
6888         if (err)
6889                 goto free_msg;
6890
6891         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6892                 goto nla_put_failure;
6893
6894         genlmsg_end(msg, hdr);
6895
6896         return genlmsg_reply(msg, info);
6897
6898  nla_put_failure:
6899         err = -ENOBUFS;
6900  free_msg:
6901         nlmsg_free(msg);
6902         return err;
6903 }
6904
6905 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6906                                             struct genl_info *info)
6907 {
6908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6909         struct wireless_dev *wdev = info->user_ptr[1];
6910         u64 cookie;
6911
6912         if (!info->attrs[NL80211_ATTR_COOKIE])
6913                 return -EINVAL;
6914
6915         if (!rdev->ops->cancel_remain_on_channel)
6916                 return -EOPNOTSUPP;
6917
6918         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6919
6920         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6921 }
6922
6923 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6924                            u8 *rates, u8 rates_len)
6925 {
6926         u8 i;
6927         u32 mask = 0;
6928
6929         for (i = 0; i < rates_len; i++) {
6930                 int rate = (rates[i] & 0x7f) * 5;
6931                 int ridx;
6932                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6933                         struct ieee80211_rate *srate =
6934                                 &sband->bitrates[ridx];
6935                         if (rate == srate->bitrate) {
6936                                 mask |= 1 << ridx;
6937                                 break;
6938                         }
6939                 }
6940                 if (ridx == sband->n_bitrates)
6941                         return 0; /* rate not found */
6942         }
6943
6944         return mask;
6945 }
6946
6947 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6948                                u8 *rates, u8 rates_len,
6949                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6950 {
6951         u8 i;
6952
6953         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6954
6955         for (i = 0; i < rates_len; i++) {
6956                 int ridx, rbit;
6957
6958                 ridx = rates[i] / 8;
6959                 rbit = BIT(rates[i] % 8);
6960
6961                 /* check validity */
6962                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6963                         return false;
6964
6965                 /* check availability */
6966                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6967                         mcs[ridx] |= rbit;
6968                 else
6969                         return false;
6970         }
6971
6972         return true;
6973 }
6974
6975 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6976         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6977                                     .len = NL80211_MAX_SUPP_RATES },
6978         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6979                                  .len = NL80211_MAX_SUPP_HT_RATES },
6980 };
6981
6982 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6983                                        struct genl_info *info)
6984 {
6985         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6987         struct cfg80211_bitrate_mask mask;
6988         int rem, i;
6989         struct net_device *dev = info->user_ptr[1];
6990         struct nlattr *tx_rates;
6991         struct ieee80211_supported_band *sband;
6992
6993         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6994                 return -EINVAL;
6995
6996         if (!rdev->ops->set_bitrate_mask)
6997                 return -EOPNOTSUPP;
6998
6999         memset(&mask, 0, sizeof(mask));
7000         /* Default to all rates enabled */
7001         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7002                 sband = rdev->wiphy.bands[i];
7003                 mask.control[i].legacy =
7004                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7005                 if (sband)
7006                         memcpy(mask.control[i].mcs,
7007                                sband->ht_cap.mcs.rx_mask,
7008                                sizeof(mask.control[i].mcs));
7009                 else
7010                         memset(mask.control[i].mcs, 0,
7011                                sizeof(mask.control[i].mcs));
7012         }
7013
7014         /*
7015          * The nested attribute uses enum nl80211_band as the index. This maps
7016          * directly to the enum ieee80211_band values used in cfg80211.
7017          */
7018         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7019         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7020         {
7021                 enum ieee80211_band band = nla_type(tx_rates);
7022                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7023                         return -EINVAL;
7024                 sband = rdev->wiphy.bands[band];
7025                 if (sband == NULL)
7026                         return -EINVAL;
7027                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7028                           nla_len(tx_rates), nl80211_txattr_policy);
7029                 if (tb[NL80211_TXRATE_LEGACY]) {
7030                         mask.control[band].legacy = rateset_to_mask(
7031                                 sband,
7032                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7033                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7034                         if ((mask.control[band].legacy == 0) &&
7035                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7036                                 return -EINVAL;
7037                 }
7038                 if (tb[NL80211_TXRATE_MCS]) {
7039                         if (!ht_rateset_to_mask(
7040                                         sband,
7041                                         nla_data(tb[NL80211_TXRATE_MCS]),
7042                                         nla_len(tb[NL80211_TXRATE_MCS]),
7043                                         mask.control[band].mcs))
7044                                 return -EINVAL;
7045                 }
7046
7047                 if (mask.control[band].legacy == 0) {
7048                         /* don't allow empty legacy rates if HT
7049                          * is not even supported. */
7050                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7051                                 return -EINVAL;
7052
7053                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7054                                 if (mask.control[band].mcs[i])
7055                                         break;
7056
7057                         /* legacy and mcs rates may not be both empty */
7058                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7059                                 return -EINVAL;
7060                 }
7061         }
7062
7063         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7064 }
7065
7066 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7067 {
7068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7069         struct wireless_dev *wdev = info->user_ptr[1];
7070         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7071
7072         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7073                 return -EINVAL;
7074
7075         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7076                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7077
7078         switch (wdev->iftype) {
7079         case NL80211_IFTYPE_STATION:
7080         case NL80211_IFTYPE_ADHOC:
7081         case NL80211_IFTYPE_P2P_CLIENT:
7082         case NL80211_IFTYPE_AP:
7083         case NL80211_IFTYPE_AP_VLAN:
7084         case NL80211_IFTYPE_MESH_POINT:
7085         case NL80211_IFTYPE_P2P_GO:
7086         case NL80211_IFTYPE_P2P_DEVICE:
7087                 break;
7088         default:
7089                 return -EOPNOTSUPP;
7090         }
7091
7092         /* not much point in registering if we can't reply */
7093         if (!rdev->ops->mgmt_tx)
7094                 return -EOPNOTSUPP;
7095
7096         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7097                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7098                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7099 }
7100
7101 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7102 {
7103         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7104         struct wireless_dev *wdev = info->user_ptr[1];
7105         struct cfg80211_chan_def chandef;
7106         int err;
7107         void *hdr = NULL;
7108         u64 cookie;
7109         struct sk_buff *msg = NULL;
7110         unsigned int wait = 0;
7111         bool offchan, no_cck, dont_wait_for_ack;
7112
7113         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7114
7115         if (!info->attrs[NL80211_ATTR_FRAME])
7116                 return -EINVAL;
7117
7118         if (!rdev->ops->mgmt_tx)
7119                 return -EOPNOTSUPP;
7120
7121         switch (wdev->iftype) {
7122         case NL80211_IFTYPE_STATION:
7123         case NL80211_IFTYPE_ADHOC:
7124         case NL80211_IFTYPE_P2P_CLIENT:
7125         case NL80211_IFTYPE_AP:
7126         case NL80211_IFTYPE_AP_VLAN:
7127         case NL80211_IFTYPE_MESH_POINT:
7128         case NL80211_IFTYPE_P2P_GO:
7129         case NL80211_IFTYPE_P2P_DEVICE:
7130                 break;
7131         default:
7132                 return -EOPNOTSUPP;
7133         }
7134
7135         if (info->attrs[NL80211_ATTR_DURATION]) {
7136                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7137                         return -EINVAL;
7138                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7139
7140                 /*
7141                  * We should wait on the channel for at least a minimum amount
7142                  * of time (10ms) but no longer than the driver supports.
7143                  */
7144                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7145                     wait > rdev->wiphy.max_remain_on_channel_duration)
7146                         return -EINVAL;
7147
7148         }
7149
7150         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7151
7152         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7153                 return -EINVAL;
7154
7155         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7156
7157         err = nl80211_parse_chandef(rdev, info, &chandef);
7158         if (err)
7159                 return err;
7160
7161         if (!dont_wait_for_ack) {
7162                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7163                 if (!msg)
7164                         return -ENOMEM;
7165
7166                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7167                                      NL80211_CMD_FRAME);
7168
7169                 if (IS_ERR(hdr)) {
7170                         err = PTR_ERR(hdr);
7171                         goto free_msg;
7172                 }
7173         }
7174
7175         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7176                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7177                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7178                                     no_cck, dont_wait_for_ack, &cookie);
7179         if (err)
7180                 goto free_msg;
7181
7182         if (msg) {
7183                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7184                         goto nla_put_failure;
7185
7186                 genlmsg_end(msg, hdr);
7187                 return genlmsg_reply(msg, info);
7188         }
7189
7190         return 0;
7191
7192  nla_put_failure:
7193         err = -ENOBUFS;
7194  free_msg:
7195         nlmsg_free(msg);
7196         return err;
7197 }
7198
7199 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7200 {
7201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7202         struct wireless_dev *wdev = info->user_ptr[1];
7203         u64 cookie;
7204
7205         if (!info->attrs[NL80211_ATTR_COOKIE])
7206                 return -EINVAL;
7207
7208         if (!rdev->ops->mgmt_tx_cancel_wait)
7209                 return -EOPNOTSUPP;
7210
7211         switch (wdev->iftype) {
7212         case NL80211_IFTYPE_STATION:
7213         case NL80211_IFTYPE_ADHOC:
7214         case NL80211_IFTYPE_P2P_CLIENT:
7215         case NL80211_IFTYPE_AP:
7216         case NL80211_IFTYPE_AP_VLAN:
7217         case NL80211_IFTYPE_P2P_GO:
7218         case NL80211_IFTYPE_P2P_DEVICE:
7219                 break;
7220         default:
7221                 return -EOPNOTSUPP;
7222         }
7223
7224         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7225
7226         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7227 }
7228
7229 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7230 {
7231         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7232         struct wireless_dev *wdev;
7233         struct net_device *dev = info->user_ptr[1];
7234         u8 ps_state;
7235         bool state;
7236         int err;
7237
7238         if (!info->attrs[NL80211_ATTR_PS_STATE])
7239                 return -EINVAL;
7240
7241         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7242
7243         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7244                 return -EINVAL;
7245
7246         wdev = dev->ieee80211_ptr;
7247
7248         if (!rdev->ops->set_power_mgmt)
7249                 return -EOPNOTSUPP;
7250
7251         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7252
7253         if (state == wdev->ps)
7254                 return 0;
7255
7256         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7257         if (!err)
7258                 wdev->ps = state;
7259         return err;
7260 }
7261
7262 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7263 {
7264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7265         enum nl80211_ps_state ps_state;
7266         struct wireless_dev *wdev;
7267         struct net_device *dev = info->user_ptr[1];
7268         struct sk_buff *msg;
7269         void *hdr;
7270         int err;
7271
7272         wdev = dev->ieee80211_ptr;
7273
7274         if (!rdev->ops->set_power_mgmt)
7275                 return -EOPNOTSUPP;
7276
7277         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7278         if (!msg)
7279                 return -ENOMEM;
7280
7281         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7282                              NL80211_CMD_GET_POWER_SAVE);
7283         if (!hdr) {
7284                 err = -ENOBUFS;
7285                 goto free_msg;
7286         }
7287
7288         if (wdev->ps)
7289                 ps_state = NL80211_PS_ENABLED;
7290         else
7291                 ps_state = NL80211_PS_DISABLED;
7292
7293         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7294                 goto nla_put_failure;
7295
7296         genlmsg_end(msg, hdr);
7297         return genlmsg_reply(msg, info);
7298
7299  nla_put_failure:
7300         err = -ENOBUFS;
7301  free_msg:
7302         nlmsg_free(msg);
7303         return err;
7304 }
7305
7306 static struct nla_policy
7307 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7308         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7309         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7310         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7311         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7312         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7313         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7314 };
7315
7316 static int nl80211_set_cqm_txe(struct genl_info *info,
7317                                u32 rate, u32 pkts, u32 intvl)
7318 {
7319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7320         struct wireless_dev *wdev;
7321         struct net_device *dev = info->user_ptr[1];
7322
7323         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7324                 return -EINVAL;
7325
7326         wdev = dev->ieee80211_ptr;
7327
7328         if (!rdev->ops->set_cqm_txe_config)
7329                 return -EOPNOTSUPP;
7330
7331         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7332             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7333                 return -EOPNOTSUPP;
7334
7335         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7336 }
7337
7338 static int nl80211_set_cqm_rssi(struct genl_info *info,
7339                                 s32 threshold, u32 hysteresis)
7340 {
7341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7342         struct wireless_dev *wdev;
7343         struct net_device *dev = info->user_ptr[1];
7344
7345         if (threshold > 0)
7346                 return -EINVAL;
7347
7348         wdev = dev->ieee80211_ptr;
7349
7350         if (!rdev->ops->set_cqm_rssi_config)
7351                 return -EOPNOTSUPP;
7352
7353         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7354             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7355                 return -EOPNOTSUPP;
7356
7357         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7358 }
7359
7360 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7361 {
7362         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7363         struct nlattr *cqm;
7364         int err;
7365
7366         cqm = info->attrs[NL80211_ATTR_CQM];
7367         if (!cqm) {
7368                 err = -EINVAL;
7369                 goto out;
7370         }
7371
7372         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7373                                nl80211_attr_cqm_policy);
7374         if (err)
7375                 goto out;
7376
7377         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7378             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7379                 s32 threshold;
7380                 u32 hysteresis;
7381                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7382                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7383                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7384         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7385                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7386                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7387                 u32 rate, pkts, intvl;
7388                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7389                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7390                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7391                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7392         } else
7393                 err = -EINVAL;
7394
7395 out:
7396         return err;
7397 }
7398
7399 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7400 {
7401         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7402         struct net_device *dev = info->user_ptr[1];
7403         struct mesh_config cfg;
7404         struct mesh_setup setup;
7405         int err;
7406
7407         /* start with default */
7408         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7409         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7410
7411         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7412                 /* and parse parameters if given */
7413                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7414                 if (err)
7415                         return err;
7416         }
7417
7418         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7419             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7420                 return -EINVAL;
7421
7422         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7423         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7424
7425         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7426             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7427                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7428                         return -EINVAL;
7429
7430         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7431                 setup.beacon_interval =
7432                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7433                 if (setup.beacon_interval < 10 ||
7434                     setup.beacon_interval > 10000)
7435                         return -EINVAL;
7436         }
7437
7438         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7439                 setup.dtim_period =
7440                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7441                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7442                         return -EINVAL;
7443         }
7444
7445         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7446                 /* parse additional setup parameters if given */
7447                 err = nl80211_parse_mesh_setup(info, &setup);
7448                 if (err)
7449                         return err;
7450         }
7451
7452         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7453                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7454                 if (err)
7455                         return err;
7456         } else {
7457                 /* cfg80211_join_mesh() will sort it out */
7458                 setup.chandef.chan = NULL;
7459         }
7460
7461         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7462 }
7463
7464 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7465 {
7466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7467         struct net_device *dev = info->user_ptr[1];
7468
7469         return cfg80211_leave_mesh(rdev, dev);
7470 }
7471
7472 #ifdef CONFIG_PM
7473 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7474                                         struct cfg80211_registered_device *rdev)
7475 {
7476         struct nlattr *nl_pats, *nl_pat;
7477         int i, pat_len;
7478
7479         if (!rdev->wowlan->n_patterns)
7480                 return 0;
7481
7482         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7483         if (!nl_pats)
7484                 return -ENOBUFS;
7485
7486         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7487                 nl_pat = nla_nest_start(msg, i + 1);
7488                 if (!nl_pat)
7489                         return -ENOBUFS;
7490                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7491                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7492                             DIV_ROUND_UP(pat_len, 8),
7493                             rdev->wowlan->patterns[i].mask) ||
7494                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7495                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7496                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7497                                 rdev->wowlan->patterns[i].pkt_offset))
7498                         return -ENOBUFS;
7499                 nla_nest_end(msg, nl_pat);
7500         }
7501         nla_nest_end(msg, nl_pats);
7502
7503         return 0;
7504 }
7505
7506 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7507                                    struct cfg80211_wowlan_tcp *tcp)
7508 {
7509         struct nlattr *nl_tcp;
7510
7511         if (!tcp)
7512                 return 0;
7513
7514         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7515         if (!nl_tcp)
7516                 return -ENOBUFS;
7517
7518         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7519             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7520             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7521             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7522             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7523             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7524                     tcp->payload_len, tcp->payload) ||
7525             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7526                         tcp->data_interval) ||
7527             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7528                     tcp->wake_len, tcp->wake_data) ||
7529             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7530                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7531                 return -ENOBUFS;
7532
7533         if (tcp->payload_seq.len &&
7534             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7535                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7536                 return -ENOBUFS;
7537
7538         if (tcp->payload_tok.len &&
7539             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7540                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7541                     &tcp->payload_tok))
7542                 return -ENOBUFS;
7543
7544         return 0;
7545 }
7546
7547 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7548 {
7549         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7550         struct sk_buff *msg;
7551         void *hdr;
7552         u32 size = NLMSG_DEFAULT_SIZE;
7553
7554         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7555             !rdev->wiphy.wowlan.tcp)
7556                 return -EOPNOTSUPP;
7557
7558         if (rdev->wowlan && rdev->wowlan->tcp) {
7559                 /* adjust size to have room for all the data */
7560                 size += rdev->wowlan->tcp->tokens_size +
7561                         rdev->wowlan->tcp->payload_len +
7562                         rdev->wowlan->tcp->wake_len +
7563                         rdev->wowlan->tcp->wake_len / 8;
7564         }
7565
7566         msg = nlmsg_new(size, GFP_KERNEL);
7567         if (!msg)
7568                 return -ENOMEM;
7569
7570         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7571                              NL80211_CMD_GET_WOWLAN);
7572         if (!hdr)
7573                 goto nla_put_failure;
7574
7575         if (rdev->wowlan) {
7576                 struct nlattr *nl_wowlan;
7577
7578                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7579                 if (!nl_wowlan)
7580                         goto nla_put_failure;
7581
7582                 if ((rdev->wowlan->any &&
7583                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7584                     (rdev->wowlan->disconnect &&
7585                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7586                     (rdev->wowlan->magic_pkt &&
7587                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7588                     (rdev->wowlan->gtk_rekey_failure &&
7589                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7590                     (rdev->wowlan->eap_identity_req &&
7591                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7592                     (rdev->wowlan->four_way_handshake &&
7593                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7594                     (rdev->wowlan->rfkill_release &&
7595                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7596                         goto nla_put_failure;
7597
7598                 if (nl80211_send_wowlan_patterns(msg, rdev))
7599                         goto nla_put_failure;
7600
7601                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7602                         goto nla_put_failure;
7603
7604                 nla_nest_end(msg, nl_wowlan);
7605         }
7606
7607         genlmsg_end(msg, hdr);
7608         return genlmsg_reply(msg, info);
7609
7610 nla_put_failure:
7611         nlmsg_free(msg);
7612         return -ENOBUFS;
7613 }
7614
7615 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7616                                     struct nlattr *attr,
7617                                     struct cfg80211_wowlan *trig)
7618 {
7619         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7620         struct cfg80211_wowlan_tcp *cfg;
7621         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7622         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7623         u32 size;
7624         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7625         int err, port;
7626
7627         if (!rdev->wiphy.wowlan.tcp)
7628                 return -EINVAL;
7629
7630         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7631                         nla_data(attr), nla_len(attr),
7632                         nl80211_wowlan_tcp_policy);
7633         if (err)
7634                 return err;
7635
7636         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7637             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7638             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7639             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7640             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7641             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7642             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7643             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7644                 return -EINVAL;
7645
7646         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7647         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7648                 return -EINVAL;
7649
7650         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7651                         rdev->wiphy.wowlan.tcp->data_interval_max ||
7652             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7653                 return -EINVAL;
7654
7655         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7656         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7657                 return -EINVAL;
7658
7659         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7660         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7661                 return -EINVAL;
7662
7663         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7664                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7665
7666                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7667                 tokens_size = tokln - sizeof(*tok);
7668
7669                 if (!tok->len || tokens_size % tok->len)
7670                         return -EINVAL;
7671                 if (!rdev->wiphy.wowlan.tcp->tok)
7672                         return -EINVAL;
7673                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7674                         return -EINVAL;
7675                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7676                         return -EINVAL;
7677                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7678                         return -EINVAL;
7679                 if (tok->offset + tok->len > data_size)
7680                         return -EINVAL;
7681         }
7682
7683         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7684                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7685                 if (!rdev->wiphy.wowlan.tcp->seq)
7686                         return -EINVAL;
7687                 if (seq->len == 0 || seq->len > 4)
7688                         return -EINVAL;
7689                 if (seq->len + seq->offset > data_size)
7690                         return -EINVAL;
7691         }
7692
7693         size = sizeof(*cfg);
7694         size += data_size;
7695         size += wake_size + wake_mask_size;
7696         size += tokens_size;
7697
7698         cfg = kzalloc(size, GFP_KERNEL);
7699         if (!cfg)
7700                 return -ENOMEM;
7701         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7702         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7703         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7704                ETH_ALEN);
7705         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7706                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7707         else
7708                 port = 0;
7709 #ifdef CONFIG_INET
7710         /* allocate a socket and port for it and use it */
7711         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7712                             IPPROTO_TCP, &cfg->sock, 1);
7713         if (err) {
7714                 kfree(cfg);
7715                 return err;
7716         }
7717         if (inet_csk_get_port(cfg->sock->sk, port)) {
7718                 sock_release(cfg->sock);
7719                 kfree(cfg);
7720                 return -EADDRINUSE;
7721         }
7722         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7723 #else
7724         if (!port) {
7725                 kfree(cfg);
7726                 return -EINVAL;
7727         }
7728         cfg->src_port = port;
7729 #endif
7730
7731         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7732         cfg->payload_len = data_size;
7733         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7734         memcpy((void *)cfg->payload,
7735                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7736                data_size);
7737         if (seq)
7738                 cfg->payload_seq = *seq;
7739         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7740         cfg->wake_len = wake_size;
7741         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7742         memcpy((void *)cfg->wake_data,
7743                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7744                wake_size);
7745         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7746                          data_size + wake_size;
7747         memcpy((void *)cfg->wake_mask,
7748                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7749                wake_mask_size);
7750         if (tok) {
7751                 cfg->tokens_size = tokens_size;
7752                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7753         }
7754
7755         trig->tcp = cfg;
7756
7757         return 0;
7758 }
7759
7760 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7761 {
7762         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7763         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7764         struct cfg80211_wowlan new_triggers = {};
7765         struct cfg80211_wowlan *ntrig;
7766         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7767         int err, i;
7768         bool prev_enabled = rdev->wowlan;
7769
7770         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7771             !rdev->wiphy.wowlan.tcp)
7772                 return -EOPNOTSUPP;
7773
7774         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7775                 cfg80211_rdev_free_wowlan(rdev);
7776                 rdev->wowlan = NULL;
7777                 goto set_wakeup;
7778         }
7779
7780         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7781                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7782                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7783                         nl80211_wowlan_policy);
7784         if (err)
7785                 return err;
7786
7787         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7788                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7789                         return -EINVAL;
7790                 new_triggers.any = true;
7791         }
7792
7793         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7794                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7795                         return -EINVAL;
7796                 new_triggers.disconnect = true;
7797         }
7798
7799         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7800                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7801                         return -EINVAL;
7802                 new_triggers.magic_pkt = true;
7803         }
7804
7805         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7806                 return -EINVAL;
7807
7808         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7809                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7810                         return -EINVAL;
7811                 new_triggers.gtk_rekey_failure = true;
7812         }
7813
7814         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7815                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7816                         return -EINVAL;
7817                 new_triggers.eap_identity_req = true;
7818         }
7819
7820         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7821                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7822                         return -EINVAL;
7823                 new_triggers.four_way_handshake = true;
7824         }
7825
7826         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7827                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7828                         return -EINVAL;
7829                 new_triggers.rfkill_release = true;
7830         }
7831
7832         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7833                 struct nlattr *pat;
7834                 int n_patterns = 0;
7835                 int rem, pat_len, mask_len, pkt_offset;
7836                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7837
7838                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7839                                     rem)
7840                         n_patterns++;
7841                 if (n_patterns > wowlan->n_patterns)
7842                         return -EINVAL;
7843
7844                 new_triggers.patterns = kcalloc(n_patterns,
7845                                                 sizeof(new_triggers.patterns[0]),
7846                                                 GFP_KERNEL);
7847                 if (!new_triggers.patterns)
7848                         return -ENOMEM;
7849
7850                 new_triggers.n_patterns = n_patterns;
7851                 i = 0;
7852
7853                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7854                                     rem) {
7855                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7856                                   nla_data(pat), nla_len(pat), NULL);
7857                         err = -EINVAL;
7858                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7859                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7860                                 goto error;
7861                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7862                         mask_len = DIV_ROUND_UP(pat_len, 8);
7863                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7864                             mask_len)
7865                                 goto error;
7866                         if (pat_len > wowlan->pattern_max_len ||
7867                             pat_len < wowlan->pattern_min_len)
7868                                 goto error;
7869
7870                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7871                                 pkt_offset = 0;
7872                         else
7873                                 pkt_offset = nla_get_u32(
7874                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7875                         if (pkt_offset > wowlan->max_pkt_offset)
7876                                 goto error;
7877                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7878
7879                         new_triggers.patterns[i].mask =
7880                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7881                         if (!new_triggers.patterns[i].mask) {
7882                                 err = -ENOMEM;
7883                                 goto error;
7884                         }
7885                         new_triggers.patterns[i].pattern =
7886                                 new_triggers.patterns[i].mask + mask_len;
7887                         memcpy(new_triggers.patterns[i].mask,
7888                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7889                                mask_len);
7890                         new_triggers.patterns[i].pattern_len = pat_len;
7891                         memcpy(new_triggers.patterns[i].pattern,
7892                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7893                                pat_len);
7894                         i++;
7895                 }
7896         }
7897
7898         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7899                 err = nl80211_parse_wowlan_tcp(
7900                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7901                         &new_triggers);
7902                 if (err)
7903                         goto error;
7904         }
7905
7906         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7907         if (!ntrig) {
7908                 err = -ENOMEM;
7909                 goto error;
7910         }
7911         cfg80211_rdev_free_wowlan(rdev);
7912         rdev->wowlan = ntrig;
7913
7914  set_wakeup:
7915         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7916                 rdev_set_wakeup(rdev, rdev->wowlan);
7917
7918         return 0;
7919  error:
7920         for (i = 0; i < new_triggers.n_patterns; i++)
7921                 kfree(new_triggers.patterns[i].mask);
7922         kfree(new_triggers.patterns);
7923         if (new_triggers.tcp && new_triggers.tcp->sock)
7924                 sock_release(new_triggers.tcp->sock);
7925         kfree(new_triggers.tcp);
7926         return err;
7927 }
7928 #endif
7929
7930 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7931 {
7932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7933         struct net_device *dev = info->user_ptr[1];
7934         struct wireless_dev *wdev = dev->ieee80211_ptr;
7935         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7936         struct cfg80211_gtk_rekey_data rekey_data;
7937         int err;
7938
7939         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7940                 return -EINVAL;
7941
7942         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7943                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7944                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7945                         nl80211_rekey_policy);
7946         if (err)
7947                 return err;
7948
7949         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7950                 return -ERANGE;
7951         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7952                 return -ERANGE;
7953         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7954                 return -ERANGE;
7955
7956         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7957                NL80211_KEK_LEN);
7958         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7959                NL80211_KCK_LEN);
7960         memcpy(rekey_data.replay_ctr,
7961                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7962                NL80211_REPLAY_CTR_LEN);
7963
7964         wdev_lock(wdev);
7965         if (!wdev->current_bss) {
7966                 err = -ENOTCONN;
7967                 goto out;
7968         }
7969
7970         if (!rdev->ops->set_rekey_data) {
7971                 err = -EOPNOTSUPP;
7972                 goto out;
7973         }
7974
7975         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7976  out:
7977         wdev_unlock(wdev);
7978         return err;
7979 }
7980
7981 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7982                                              struct genl_info *info)
7983 {
7984         struct net_device *dev = info->user_ptr[1];
7985         struct wireless_dev *wdev = dev->ieee80211_ptr;
7986
7987         if (wdev->iftype != NL80211_IFTYPE_AP &&
7988             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7989                 return -EINVAL;
7990
7991         if (wdev->ap_unexpected_nlportid)
7992                 return -EBUSY;
7993
7994         wdev->ap_unexpected_nlportid = info->snd_portid;
7995         return 0;
7996 }
7997
7998 static int nl80211_probe_client(struct sk_buff *skb,
7999                                 struct genl_info *info)
8000 {
8001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8002         struct net_device *dev = info->user_ptr[1];
8003         struct wireless_dev *wdev = dev->ieee80211_ptr;
8004         struct sk_buff *msg;
8005         void *hdr;
8006         const u8 *addr;
8007         u64 cookie;
8008         int err;
8009
8010         if (wdev->iftype != NL80211_IFTYPE_AP &&
8011             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8012                 return -EOPNOTSUPP;
8013
8014         if (!info->attrs[NL80211_ATTR_MAC])
8015                 return -EINVAL;
8016
8017         if (!rdev->ops->probe_client)
8018                 return -EOPNOTSUPP;
8019
8020         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8021         if (!msg)
8022                 return -ENOMEM;
8023
8024         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8025                              NL80211_CMD_PROBE_CLIENT);
8026
8027         if (IS_ERR(hdr)) {
8028                 err = PTR_ERR(hdr);
8029                 goto free_msg;
8030         }
8031
8032         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8033
8034         err = rdev_probe_client(rdev, dev, addr, &cookie);
8035         if (err)
8036                 goto free_msg;
8037
8038         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8039                 goto nla_put_failure;
8040
8041         genlmsg_end(msg, hdr);
8042
8043         return genlmsg_reply(msg, info);
8044
8045  nla_put_failure:
8046         err = -ENOBUFS;
8047  free_msg:
8048         nlmsg_free(msg);
8049         return err;
8050 }
8051
8052 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8053 {
8054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8055         struct cfg80211_beacon_registration *reg, *nreg;
8056         int rv;
8057
8058         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8059                 return -EOPNOTSUPP;
8060
8061         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8062         if (!nreg)
8063                 return -ENOMEM;
8064
8065         /* First, check if already registered. */
8066         spin_lock_bh(&rdev->beacon_registrations_lock);
8067         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8068                 if (reg->nlportid == info->snd_portid) {
8069                         rv = -EALREADY;
8070                         goto out_err;
8071                 }
8072         }
8073         /* Add it to the list */
8074         nreg->nlportid = info->snd_portid;
8075         list_add(&nreg->list, &rdev->beacon_registrations);
8076
8077         spin_unlock_bh(&rdev->beacon_registrations_lock);
8078
8079         return 0;
8080 out_err:
8081         spin_unlock_bh(&rdev->beacon_registrations_lock);
8082         kfree(nreg);
8083         return rv;
8084 }
8085
8086 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8087 {
8088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8089         struct wireless_dev *wdev = info->user_ptr[1];
8090         int err;
8091
8092         if (!rdev->ops->start_p2p_device)
8093                 return -EOPNOTSUPP;
8094
8095         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8096                 return -EOPNOTSUPP;
8097
8098         if (wdev->p2p_started)
8099                 return 0;
8100
8101         mutex_lock(&rdev->devlist_mtx);
8102         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8103         mutex_unlock(&rdev->devlist_mtx);
8104         if (err)
8105                 return err;
8106
8107         err = rdev_start_p2p_device(rdev, wdev);
8108         if (err)
8109                 return err;
8110
8111         wdev->p2p_started = true;
8112         mutex_lock(&rdev->devlist_mtx);
8113         rdev->opencount++;
8114         mutex_unlock(&rdev->devlist_mtx);
8115
8116         return 0;
8117 }
8118
8119 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8120 {
8121         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8122         struct wireless_dev *wdev = info->user_ptr[1];
8123
8124         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8125                 return -EOPNOTSUPP;
8126
8127         if (!rdev->ops->stop_p2p_device)
8128                 return -EOPNOTSUPP;
8129
8130         if (!wdev->p2p_started)
8131                 return 0;
8132
8133         rdev_stop_p2p_device(rdev, wdev);
8134         wdev->p2p_started = false;
8135
8136         mutex_lock(&rdev->devlist_mtx);
8137         rdev->opencount--;
8138         mutex_unlock(&rdev->devlist_mtx);
8139
8140         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
8141                 rdev->scan_req->aborted = true;
8142                 ___cfg80211_scan_done(rdev, true);
8143         }
8144
8145         return 0;
8146 }
8147
8148 static int nl80211_get_protocol_features(struct sk_buff *skb,
8149                                          struct genl_info *info)
8150 {
8151         void *hdr;
8152         struct sk_buff *msg;
8153
8154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8155         if (!msg)
8156                 return -ENOMEM;
8157
8158         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8159                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8160         if (!hdr)
8161                 goto nla_put_failure;
8162
8163         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8164                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8165                 goto nla_put_failure;
8166
8167         genlmsg_end(msg, hdr);
8168         return genlmsg_reply(msg, info);
8169
8170  nla_put_failure:
8171         kfree_skb(msg);
8172         return -ENOBUFS;
8173 }
8174
8175 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8176 {
8177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8178         struct cfg80211_update_ft_ies_params ft_params;
8179         struct net_device *dev = info->user_ptr[1];
8180
8181         if (!rdev->ops->update_ft_ies)
8182                 return -EOPNOTSUPP;
8183
8184         if (!info->attrs[NL80211_ATTR_MDID] ||
8185             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8186                 return -EINVAL;
8187
8188         memset(&ft_params, 0, sizeof(ft_params));
8189         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8190         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8191         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8192
8193         return rdev_update_ft_ies(rdev, dev, &ft_params);
8194 }
8195
8196 #define NL80211_FLAG_NEED_WIPHY         0x01
8197 #define NL80211_FLAG_NEED_NETDEV        0x02
8198 #define NL80211_FLAG_NEED_RTNL          0x04
8199 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8200 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8201                                          NL80211_FLAG_CHECK_NETDEV_UP)
8202 #define NL80211_FLAG_NEED_WDEV          0x10
8203 /* If a netdev is associated, it must be UP, P2P must be started */
8204 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8205                                          NL80211_FLAG_CHECK_NETDEV_UP)
8206
8207 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8208                             struct genl_info *info)
8209 {
8210         struct cfg80211_registered_device *rdev;
8211         struct wireless_dev *wdev;
8212         struct net_device *dev;
8213         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8214
8215         if (rtnl)
8216                 rtnl_lock();
8217
8218         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8219                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8220                 if (IS_ERR(rdev)) {
8221                         if (rtnl)
8222                                 rtnl_unlock();
8223                         return PTR_ERR(rdev);
8224                 }
8225                 info->user_ptr[0] = rdev;
8226         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8227                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8228                 mutex_lock(&cfg80211_mutex);
8229                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8230                                                   info->attrs);
8231                 if (IS_ERR(wdev)) {
8232                         mutex_unlock(&cfg80211_mutex);
8233                         if (rtnl)
8234                                 rtnl_unlock();
8235                         return PTR_ERR(wdev);
8236                 }
8237
8238                 dev = wdev->netdev;
8239                 rdev = wiphy_to_dev(wdev->wiphy);
8240
8241                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8242                         if (!dev) {
8243                                 mutex_unlock(&cfg80211_mutex);
8244                                 if (rtnl)
8245                                         rtnl_unlock();
8246                                 return -EINVAL;
8247                         }
8248
8249                         info->user_ptr[1] = dev;
8250                 } else {
8251                         info->user_ptr[1] = wdev;
8252                 }
8253
8254                 if (dev) {
8255                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8256                             !netif_running(dev)) {
8257                                 mutex_unlock(&cfg80211_mutex);
8258                                 if (rtnl)
8259                                         rtnl_unlock();
8260                                 return -ENETDOWN;
8261                         }
8262
8263                         dev_hold(dev);
8264                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8265                         if (!wdev->p2p_started) {
8266                                 mutex_unlock(&cfg80211_mutex);
8267                                 if (rtnl)
8268                                         rtnl_unlock();
8269                                 return -ENETDOWN;
8270                         }
8271                 }
8272
8273                 cfg80211_lock_rdev(rdev);
8274
8275                 mutex_unlock(&cfg80211_mutex);
8276
8277                 info->user_ptr[0] = rdev;
8278         }
8279
8280         return 0;
8281 }
8282
8283 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8284                               struct genl_info *info)
8285 {
8286         if (info->user_ptr[0])
8287                 cfg80211_unlock_rdev(info->user_ptr[0]);
8288         if (info->user_ptr[1]) {
8289                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8290                         struct wireless_dev *wdev = info->user_ptr[1];
8291
8292                         if (wdev->netdev)
8293                                 dev_put(wdev->netdev);
8294                 } else {
8295                         dev_put(info->user_ptr[1]);
8296                 }
8297         }
8298         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8299                 rtnl_unlock();
8300 }
8301
8302 static struct genl_ops nl80211_ops[] = {
8303         {
8304                 .cmd = NL80211_CMD_GET_WIPHY,
8305                 .doit = nl80211_get_wiphy,
8306                 .dumpit = nl80211_dump_wiphy,
8307                 .policy = nl80211_policy,
8308                 /* can be retrieved by unprivileged users */
8309                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
8310         },
8311         {
8312                 .cmd = NL80211_CMD_SET_WIPHY,
8313                 .doit = nl80211_set_wiphy,
8314                 .policy = nl80211_policy,
8315                 .flags = GENL_ADMIN_PERM,
8316                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8317         },
8318         {
8319                 .cmd = NL80211_CMD_GET_INTERFACE,
8320                 .doit = nl80211_get_interface,
8321                 .dumpit = nl80211_dump_interface,
8322                 .policy = nl80211_policy,
8323                 /* can be retrieved by unprivileged users */
8324                 .internal_flags = NL80211_FLAG_NEED_WDEV,
8325         },
8326         {
8327                 .cmd = NL80211_CMD_SET_INTERFACE,
8328                 .doit = nl80211_set_interface,
8329                 .policy = nl80211_policy,
8330                 .flags = GENL_ADMIN_PERM,
8331                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8332                                   NL80211_FLAG_NEED_RTNL,
8333         },
8334         {
8335                 .cmd = NL80211_CMD_NEW_INTERFACE,
8336                 .doit = nl80211_new_interface,
8337                 .policy = nl80211_policy,
8338                 .flags = GENL_ADMIN_PERM,
8339                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8340                                   NL80211_FLAG_NEED_RTNL,
8341         },
8342         {
8343                 .cmd = NL80211_CMD_DEL_INTERFACE,
8344                 .doit = nl80211_del_interface,
8345                 .policy = nl80211_policy,
8346                 .flags = GENL_ADMIN_PERM,
8347                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8348                                   NL80211_FLAG_NEED_RTNL,
8349         },
8350         {
8351                 .cmd = NL80211_CMD_GET_KEY,
8352                 .doit = nl80211_get_key,
8353                 .policy = nl80211_policy,
8354                 .flags = GENL_ADMIN_PERM,
8355                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8356                                   NL80211_FLAG_NEED_RTNL,
8357         },
8358         {
8359                 .cmd = NL80211_CMD_SET_KEY,
8360                 .doit = nl80211_set_key,
8361                 .policy = nl80211_policy,
8362                 .flags = GENL_ADMIN_PERM,
8363                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8364                                   NL80211_FLAG_NEED_RTNL,
8365         },
8366         {
8367                 .cmd = NL80211_CMD_NEW_KEY,
8368                 .doit = nl80211_new_key,
8369                 .policy = nl80211_policy,
8370                 .flags = GENL_ADMIN_PERM,
8371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8372                                   NL80211_FLAG_NEED_RTNL,
8373         },
8374         {
8375                 .cmd = NL80211_CMD_DEL_KEY,
8376                 .doit = nl80211_del_key,
8377                 .policy = nl80211_policy,
8378                 .flags = GENL_ADMIN_PERM,
8379                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8380                                   NL80211_FLAG_NEED_RTNL,
8381         },
8382         {
8383                 .cmd = NL80211_CMD_SET_BEACON,
8384                 .policy = nl80211_policy,
8385                 .flags = GENL_ADMIN_PERM,
8386                 .doit = nl80211_set_beacon,
8387                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8388                                   NL80211_FLAG_NEED_RTNL,
8389         },
8390         {
8391                 .cmd = NL80211_CMD_START_AP,
8392                 .policy = nl80211_policy,
8393                 .flags = GENL_ADMIN_PERM,
8394                 .doit = nl80211_start_ap,
8395                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8396                                   NL80211_FLAG_NEED_RTNL,
8397         },
8398         {
8399                 .cmd = NL80211_CMD_STOP_AP,
8400                 .policy = nl80211_policy,
8401                 .flags = GENL_ADMIN_PERM,
8402                 .doit = nl80211_stop_ap,
8403                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8404                                   NL80211_FLAG_NEED_RTNL,
8405         },
8406         {
8407                 .cmd = NL80211_CMD_GET_STATION,
8408                 .doit = nl80211_get_station,
8409                 .dumpit = nl80211_dump_station,
8410                 .policy = nl80211_policy,
8411                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8412                                   NL80211_FLAG_NEED_RTNL,
8413         },
8414         {
8415                 .cmd = NL80211_CMD_SET_STATION,
8416                 .doit = nl80211_set_station,
8417                 .policy = nl80211_policy,
8418                 .flags = GENL_ADMIN_PERM,
8419                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8420                                   NL80211_FLAG_NEED_RTNL,
8421         },
8422         {
8423                 .cmd = NL80211_CMD_NEW_STATION,
8424                 .doit = nl80211_new_station,
8425                 .policy = nl80211_policy,
8426                 .flags = GENL_ADMIN_PERM,
8427                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8428                                   NL80211_FLAG_NEED_RTNL,
8429         },
8430         {
8431                 .cmd = NL80211_CMD_DEL_STATION,
8432                 .doit = nl80211_del_station,
8433                 .policy = nl80211_policy,
8434                 .flags = GENL_ADMIN_PERM,
8435                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8436                                   NL80211_FLAG_NEED_RTNL,
8437         },
8438         {
8439                 .cmd = NL80211_CMD_GET_MPATH,
8440                 .doit = nl80211_get_mpath,
8441                 .dumpit = nl80211_dump_mpath,
8442                 .policy = nl80211_policy,
8443                 .flags = GENL_ADMIN_PERM,
8444                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8445                                   NL80211_FLAG_NEED_RTNL,
8446         },
8447         {
8448                 .cmd = NL80211_CMD_SET_MPATH,
8449                 .doit = nl80211_set_mpath,
8450                 .policy = nl80211_policy,
8451                 .flags = GENL_ADMIN_PERM,
8452                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8453                                   NL80211_FLAG_NEED_RTNL,
8454         },
8455         {
8456                 .cmd = NL80211_CMD_NEW_MPATH,
8457                 .doit = nl80211_new_mpath,
8458                 .policy = nl80211_policy,
8459                 .flags = GENL_ADMIN_PERM,
8460                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8461                                   NL80211_FLAG_NEED_RTNL,
8462         },
8463         {
8464                 .cmd = NL80211_CMD_DEL_MPATH,
8465                 .doit = nl80211_del_mpath,
8466                 .policy = nl80211_policy,
8467                 .flags = GENL_ADMIN_PERM,
8468                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8469                                   NL80211_FLAG_NEED_RTNL,
8470         },
8471         {
8472                 .cmd = NL80211_CMD_SET_BSS,
8473                 .doit = nl80211_set_bss,
8474                 .policy = nl80211_policy,
8475                 .flags = GENL_ADMIN_PERM,
8476                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8477                                   NL80211_FLAG_NEED_RTNL,
8478         },
8479         {
8480                 .cmd = NL80211_CMD_GET_REG,
8481                 .doit = nl80211_get_reg,
8482                 .policy = nl80211_policy,
8483                 /* can be retrieved by unprivileged users */
8484         },
8485         {
8486                 .cmd = NL80211_CMD_SET_REG,
8487                 .doit = nl80211_set_reg,
8488                 .policy = nl80211_policy,
8489                 .flags = GENL_ADMIN_PERM,
8490         },
8491         {
8492                 .cmd = NL80211_CMD_REQ_SET_REG,
8493                 .doit = nl80211_req_set_reg,
8494                 .policy = nl80211_policy,
8495                 .flags = GENL_ADMIN_PERM,
8496         },
8497         {
8498                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8499                 .doit = nl80211_get_mesh_config,
8500                 .policy = nl80211_policy,
8501                 /* can be retrieved by unprivileged users */
8502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8503                                   NL80211_FLAG_NEED_RTNL,
8504         },
8505         {
8506                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8507                 .doit = nl80211_update_mesh_config,
8508                 .policy = nl80211_policy,
8509                 .flags = GENL_ADMIN_PERM,
8510                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8511                                   NL80211_FLAG_NEED_RTNL,
8512         },
8513         {
8514                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8515                 .doit = nl80211_trigger_scan,
8516                 .policy = nl80211_policy,
8517                 .flags = GENL_ADMIN_PERM,
8518                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8519                                   NL80211_FLAG_NEED_RTNL,
8520         },
8521         {
8522                 .cmd = NL80211_CMD_GET_SCAN,
8523                 .policy = nl80211_policy,
8524                 .dumpit = nl80211_dump_scan,
8525         },
8526         {
8527                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8528                 .doit = nl80211_start_sched_scan,
8529                 .policy = nl80211_policy,
8530                 .flags = GENL_ADMIN_PERM,
8531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8532                                   NL80211_FLAG_NEED_RTNL,
8533         },
8534         {
8535                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8536                 .doit = nl80211_stop_sched_scan,
8537                 .policy = nl80211_policy,
8538                 .flags = GENL_ADMIN_PERM,
8539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8540                                   NL80211_FLAG_NEED_RTNL,
8541         },
8542         {
8543                 .cmd = NL80211_CMD_AUTHENTICATE,
8544                 .doit = nl80211_authenticate,
8545                 .policy = nl80211_policy,
8546                 .flags = GENL_ADMIN_PERM,
8547                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8548                                   NL80211_FLAG_NEED_RTNL,
8549         },
8550         {
8551                 .cmd = NL80211_CMD_ASSOCIATE,
8552                 .doit = nl80211_associate,
8553                 .policy = nl80211_policy,
8554                 .flags = GENL_ADMIN_PERM,
8555                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8556                                   NL80211_FLAG_NEED_RTNL,
8557         },
8558         {
8559                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8560                 .doit = nl80211_deauthenticate,
8561                 .policy = nl80211_policy,
8562                 .flags = GENL_ADMIN_PERM,
8563                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8564                                   NL80211_FLAG_NEED_RTNL,
8565         },
8566         {
8567                 .cmd = NL80211_CMD_DISASSOCIATE,
8568                 .doit = nl80211_disassociate,
8569                 .policy = nl80211_policy,
8570                 .flags = GENL_ADMIN_PERM,
8571                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8572                                   NL80211_FLAG_NEED_RTNL,
8573         },
8574         {
8575                 .cmd = NL80211_CMD_JOIN_IBSS,
8576                 .doit = nl80211_join_ibss,
8577                 .policy = nl80211_policy,
8578                 .flags = GENL_ADMIN_PERM,
8579                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8580                                   NL80211_FLAG_NEED_RTNL,
8581         },
8582         {
8583                 .cmd = NL80211_CMD_LEAVE_IBSS,
8584                 .doit = nl80211_leave_ibss,
8585                 .policy = nl80211_policy,
8586                 .flags = GENL_ADMIN_PERM,
8587                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8588                                   NL80211_FLAG_NEED_RTNL,
8589         },
8590 #ifdef CONFIG_NL80211_TESTMODE
8591         {
8592                 .cmd = NL80211_CMD_TESTMODE,
8593                 .doit = nl80211_testmode_do,
8594                 .dumpit = nl80211_testmode_dump,
8595                 .policy = nl80211_policy,
8596                 .flags = GENL_ADMIN_PERM,
8597                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8598                                   NL80211_FLAG_NEED_RTNL,
8599         },
8600 #endif
8601         {
8602                 .cmd = NL80211_CMD_CONNECT,
8603                 .doit = nl80211_connect,
8604                 .policy = nl80211_policy,
8605                 .flags = GENL_ADMIN_PERM,
8606                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8607                                   NL80211_FLAG_NEED_RTNL,
8608         },
8609         {
8610                 .cmd = NL80211_CMD_DISCONNECT,
8611                 .doit = nl80211_disconnect,
8612                 .policy = nl80211_policy,
8613                 .flags = GENL_ADMIN_PERM,
8614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8615                                   NL80211_FLAG_NEED_RTNL,
8616         },
8617         {
8618                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8619                 .doit = nl80211_wiphy_netns,
8620                 .policy = nl80211_policy,
8621                 .flags = GENL_ADMIN_PERM,
8622                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8623                                   NL80211_FLAG_NEED_RTNL,
8624         },
8625         {
8626                 .cmd = NL80211_CMD_GET_SURVEY,
8627                 .policy = nl80211_policy,
8628                 .dumpit = nl80211_dump_survey,
8629         },
8630         {
8631                 .cmd = NL80211_CMD_SET_PMKSA,
8632                 .doit = nl80211_setdel_pmksa,
8633                 .policy = nl80211_policy,
8634                 .flags = GENL_ADMIN_PERM,
8635                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8636                                   NL80211_FLAG_NEED_RTNL,
8637         },
8638         {
8639                 .cmd = NL80211_CMD_DEL_PMKSA,
8640                 .doit = nl80211_setdel_pmksa,
8641                 .policy = nl80211_policy,
8642                 .flags = GENL_ADMIN_PERM,
8643                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8644                                   NL80211_FLAG_NEED_RTNL,
8645         },
8646         {
8647                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8648                 .doit = nl80211_flush_pmksa,
8649                 .policy = nl80211_policy,
8650                 .flags = GENL_ADMIN_PERM,
8651                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8652                                   NL80211_FLAG_NEED_RTNL,
8653         },
8654         {
8655                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8656                 .doit = nl80211_remain_on_channel,
8657                 .policy = nl80211_policy,
8658                 .flags = GENL_ADMIN_PERM,
8659                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8660                                   NL80211_FLAG_NEED_RTNL,
8661         },
8662         {
8663                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8664                 .doit = nl80211_cancel_remain_on_channel,
8665                 .policy = nl80211_policy,
8666                 .flags = GENL_ADMIN_PERM,
8667                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8668                                   NL80211_FLAG_NEED_RTNL,
8669         },
8670         {
8671                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8672                 .doit = nl80211_set_tx_bitrate_mask,
8673                 .policy = nl80211_policy,
8674                 .flags = GENL_ADMIN_PERM,
8675                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8676                                   NL80211_FLAG_NEED_RTNL,
8677         },
8678         {
8679                 .cmd = NL80211_CMD_REGISTER_FRAME,
8680                 .doit = nl80211_register_mgmt,
8681                 .policy = nl80211_policy,
8682                 .flags = GENL_ADMIN_PERM,
8683                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8684                                   NL80211_FLAG_NEED_RTNL,
8685         },
8686         {
8687                 .cmd = NL80211_CMD_FRAME,
8688                 .doit = nl80211_tx_mgmt,
8689                 .policy = nl80211_policy,
8690                 .flags = GENL_ADMIN_PERM,
8691                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8692                                   NL80211_FLAG_NEED_RTNL,
8693         },
8694         {
8695                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8696                 .doit = nl80211_tx_mgmt_cancel_wait,
8697                 .policy = nl80211_policy,
8698                 .flags = GENL_ADMIN_PERM,
8699                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8700                                   NL80211_FLAG_NEED_RTNL,
8701         },
8702         {
8703                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8704                 .doit = nl80211_set_power_save,
8705                 .policy = nl80211_policy,
8706                 .flags = GENL_ADMIN_PERM,
8707                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8708                                   NL80211_FLAG_NEED_RTNL,
8709         },
8710         {
8711                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8712                 .doit = nl80211_get_power_save,
8713                 .policy = nl80211_policy,
8714                 /* can be retrieved by unprivileged users */
8715                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8716                                   NL80211_FLAG_NEED_RTNL,
8717         },
8718         {
8719                 .cmd = NL80211_CMD_SET_CQM,
8720                 .doit = nl80211_set_cqm,
8721                 .policy = nl80211_policy,
8722                 .flags = GENL_ADMIN_PERM,
8723                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8724                                   NL80211_FLAG_NEED_RTNL,
8725         },
8726         {
8727                 .cmd = NL80211_CMD_SET_CHANNEL,
8728                 .doit = nl80211_set_channel,
8729                 .policy = nl80211_policy,
8730                 .flags = GENL_ADMIN_PERM,
8731                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8732                                   NL80211_FLAG_NEED_RTNL,
8733         },
8734         {
8735                 .cmd = NL80211_CMD_SET_WDS_PEER,
8736                 .doit = nl80211_set_wds_peer,
8737                 .policy = nl80211_policy,
8738                 .flags = GENL_ADMIN_PERM,
8739                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8740                                   NL80211_FLAG_NEED_RTNL,
8741         },
8742         {
8743                 .cmd = NL80211_CMD_JOIN_MESH,
8744                 .doit = nl80211_join_mesh,
8745                 .policy = nl80211_policy,
8746                 .flags = GENL_ADMIN_PERM,
8747                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8748                                   NL80211_FLAG_NEED_RTNL,
8749         },
8750         {
8751                 .cmd = NL80211_CMD_LEAVE_MESH,
8752                 .doit = nl80211_leave_mesh,
8753                 .policy = nl80211_policy,
8754                 .flags = GENL_ADMIN_PERM,
8755                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8756                                   NL80211_FLAG_NEED_RTNL,
8757         },
8758 #ifdef CONFIG_PM
8759         {
8760                 .cmd = NL80211_CMD_GET_WOWLAN,
8761                 .doit = nl80211_get_wowlan,
8762                 .policy = nl80211_policy,
8763                 /* can be retrieved by unprivileged users */
8764                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8765                                   NL80211_FLAG_NEED_RTNL,
8766         },
8767         {
8768                 .cmd = NL80211_CMD_SET_WOWLAN,
8769                 .doit = nl80211_set_wowlan,
8770                 .policy = nl80211_policy,
8771                 .flags = GENL_ADMIN_PERM,
8772                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8773                                   NL80211_FLAG_NEED_RTNL,
8774         },
8775 #endif
8776         {
8777                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8778                 .doit = nl80211_set_rekey_data,
8779                 .policy = nl80211_policy,
8780                 .flags = GENL_ADMIN_PERM,
8781                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8782                                   NL80211_FLAG_NEED_RTNL,
8783         },
8784         {
8785                 .cmd = NL80211_CMD_TDLS_MGMT,
8786                 .doit = nl80211_tdls_mgmt,
8787                 .policy = nl80211_policy,
8788                 .flags = GENL_ADMIN_PERM,
8789                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8790                                   NL80211_FLAG_NEED_RTNL,
8791         },
8792         {
8793                 .cmd = NL80211_CMD_TDLS_OPER,
8794                 .doit = nl80211_tdls_oper,
8795                 .policy = nl80211_policy,
8796                 .flags = GENL_ADMIN_PERM,
8797                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8798                                   NL80211_FLAG_NEED_RTNL,
8799         },
8800         {
8801                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8802                 .doit = nl80211_register_unexpected_frame,
8803                 .policy = nl80211_policy,
8804                 .flags = GENL_ADMIN_PERM,
8805                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8806                                   NL80211_FLAG_NEED_RTNL,
8807         },
8808         {
8809                 .cmd = NL80211_CMD_PROBE_CLIENT,
8810                 .doit = nl80211_probe_client,
8811                 .policy = nl80211_policy,
8812                 .flags = GENL_ADMIN_PERM,
8813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8814                                   NL80211_FLAG_NEED_RTNL,
8815         },
8816         {
8817                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8818                 .doit = nl80211_register_beacons,
8819                 .policy = nl80211_policy,
8820                 .flags = GENL_ADMIN_PERM,
8821                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8822                                   NL80211_FLAG_NEED_RTNL,
8823         },
8824         {
8825                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8826                 .doit = nl80211_set_noack_map,
8827                 .policy = nl80211_policy,
8828                 .flags = GENL_ADMIN_PERM,
8829                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8830                                   NL80211_FLAG_NEED_RTNL,
8831         },
8832         {
8833                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8834                 .doit = nl80211_start_p2p_device,
8835                 .policy = nl80211_policy,
8836                 .flags = GENL_ADMIN_PERM,
8837                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8838                                   NL80211_FLAG_NEED_RTNL,
8839         },
8840         {
8841                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8842                 .doit = nl80211_stop_p2p_device,
8843                 .policy = nl80211_policy,
8844                 .flags = GENL_ADMIN_PERM,
8845                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8846                                   NL80211_FLAG_NEED_RTNL,
8847         },
8848         {
8849                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8850                 .doit = nl80211_set_mcast_rate,
8851                 .policy = nl80211_policy,
8852                 .flags = GENL_ADMIN_PERM,
8853                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8854                                   NL80211_FLAG_NEED_RTNL,
8855         },
8856         {
8857                 .cmd = NL80211_CMD_SET_MAC_ACL,
8858                 .doit = nl80211_set_mac_acl,
8859                 .policy = nl80211_policy,
8860                 .flags = GENL_ADMIN_PERM,
8861                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8862                                   NL80211_FLAG_NEED_RTNL,
8863         },
8864         {
8865                 .cmd = NL80211_CMD_RADAR_DETECT,
8866                 .doit = nl80211_start_radar_detection,
8867                 .policy = nl80211_policy,
8868                 .flags = GENL_ADMIN_PERM,
8869                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8870                                   NL80211_FLAG_NEED_RTNL,
8871         },
8872         {
8873                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8874                 .doit = nl80211_get_protocol_features,
8875                 .policy = nl80211_policy,
8876         },
8877         {
8878                 .cmd = NL80211_CMD_UPDATE_FT_IES,
8879                 .doit = nl80211_update_ft_ies,
8880                 .policy = nl80211_policy,
8881                 .flags = GENL_ADMIN_PERM,
8882                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8883                                   NL80211_FLAG_NEED_RTNL,
8884         },
8885 };
8886
8887 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8888         .name = "mlme",
8889 };
8890
8891 /* multicast groups */
8892 static struct genl_multicast_group nl80211_config_mcgrp = {
8893         .name = "config",
8894 };
8895 static struct genl_multicast_group nl80211_scan_mcgrp = {
8896         .name = "scan",
8897 };
8898 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8899         .name = "regulatory",
8900 };
8901
8902 /* notification functions */
8903
8904 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8905 {
8906         struct sk_buff *msg;
8907
8908         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8909         if (!msg)
8910                 return;
8911
8912         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
8913                                false, NULL, NULL, NULL) < 0) {
8914                 nlmsg_free(msg);
8915                 return;
8916         }
8917
8918         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8919                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8920 }
8921
8922 static int nl80211_add_scan_req(struct sk_buff *msg,
8923                                 struct cfg80211_registered_device *rdev)
8924 {
8925         struct cfg80211_scan_request *req = rdev->scan_req;
8926         struct nlattr *nest;
8927         int i;
8928
8929         ASSERT_RDEV_LOCK(rdev);
8930
8931         if (WARN_ON(!req))
8932                 return 0;
8933
8934         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8935         if (!nest)
8936                 goto nla_put_failure;
8937         for (i = 0; i < req->n_ssids; i++) {
8938                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8939                         goto nla_put_failure;
8940         }
8941         nla_nest_end(msg, nest);
8942
8943         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8944         if (!nest)
8945                 goto nla_put_failure;
8946         for (i = 0; i < req->n_channels; i++) {
8947                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8948                         goto nla_put_failure;
8949         }
8950         nla_nest_end(msg, nest);
8951
8952         if (req->ie &&
8953             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8954                 goto nla_put_failure;
8955
8956         if (req->flags)
8957                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8958
8959         return 0;
8960  nla_put_failure:
8961         return -ENOBUFS;
8962 }
8963
8964 static int nl80211_send_scan_msg(struct sk_buff *msg,
8965                                  struct cfg80211_registered_device *rdev,
8966                                  struct wireless_dev *wdev,
8967                                  u32 portid, u32 seq, int flags,
8968                                  u32 cmd)
8969 {
8970         void *hdr;
8971
8972         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8973         if (!hdr)
8974                 return -1;
8975
8976         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8977             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8978                                          wdev->netdev->ifindex)) ||
8979             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8980                 goto nla_put_failure;
8981
8982         /* ignore errors and send incomplete event anyway */
8983         nl80211_add_scan_req(msg, rdev);
8984
8985         return genlmsg_end(msg, hdr);
8986
8987  nla_put_failure:
8988         genlmsg_cancel(msg, hdr);
8989         return -EMSGSIZE;
8990 }
8991
8992 static int
8993 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8994                             struct cfg80211_registered_device *rdev,
8995                             struct net_device *netdev,
8996                             u32 portid, u32 seq, int flags, u32 cmd)
8997 {
8998         void *hdr;
8999
9000         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9001         if (!hdr)
9002                 return -1;
9003
9004         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9005             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9006                 goto nla_put_failure;
9007
9008         return genlmsg_end(msg, hdr);
9009
9010  nla_put_failure:
9011         genlmsg_cancel(msg, hdr);
9012         return -EMSGSIZE;
9013 }
9014
9015 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9016                              struct wireless_dev *wdev)
9017 {
9018         struct sk_buff *msg;
9019
9020         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9021         if (!msg)
9022                 return;
9023
9024         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9025                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9026                 nlmsg_free(msg);
9027                 return;
9028         }
9029
9030         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9031                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9032 }
9033
9034 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9035                             struct wireless_dev *wdev)
9036 {
9037         struct sk_buff *msg;
9038
9039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9040         if (!msg)
9041                 return;
9042
9043         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9044                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9045                 nlmsg_free(msg);
9046                 return;
9047         }
9048
9049         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9050                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9051 }
9052
9053 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9054                                struct wireless_dev *wdev)
9055 {
9056         struct sk_buff *msg;
9057
9058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9059         if (!msg)
9060                 return;
9061
9062         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9063                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9064                 nlmsg_free(msg);
9065                 return;
9066         }
9067
9068         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9069                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9070 }
9071
9072 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9073                                      struct net_device *netdev)
9074 {
9075         struct sk_buff *msg;
9076
9077         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9078         if (!msg)
9079                 return;
9080
9081         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9082                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9083                 nlmsg_free(msg);
9084                 return;
9085         }
9086
9087         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9088                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9089 }
9090
9091 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9092                              struct net_device *netdev, u32 cmd)
9093 {
9094         struct sk_buff *msg;
9095
9096         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9097         if (!msg)
9098                 return;
9099
9100         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9101                 nlmsg_free(msg);
9102                 return;
9103         }
9104
9105         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9106                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9107 }
9108
9109 /*
9110  * This can happen on global regulatory changes or device specific settings
9111  * based on custom world regulatory domains.
9112  */
9113 void nl80211_send_reg_change_event(struct regulatory_request *request)
9114 {
9115         struct sk_buff *msg;
9116         void *hdr;
9117
9118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9119         if (!msg)
9120                 return;
9121
9122         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9123         if (!hdr) {
9124                 nlmsg_free(msg);
9125                 return;
9126         }
9127
9128         /* Userspace can always count this one always being set */
9129         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9130                 goto nla_put_failure;
9131
9132         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9133                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9134                                NL80211_REGDOM_TYPE_WORLD))
9135                         goto nla_put_failure;
9136         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9137                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9138                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9139                         goto nla_put_failure;
9140         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9141                    request->intersect) {
9142                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9143                                NL80211_REGDOM_TYPE_INTERSECTION))
9144                         goto nla_put_failure;
9145         } else {
9146                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9147                                NL80211_REGDOM_TYPE_COUNTRY) ||
9148                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9149                                    request->alpha2))
9150                         goto nla_put_failure;
9151         }
9152
9153         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9154             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9155                 goto nla_put_failure;
9156
9157         genlmsg_end(msg, hdr);
9158
9159         rcu_read_lock();
9160         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9161                                 GFP_ATOMIC);
9162         rcu_read_unlock();
9163
9164         return;
9165
9166 nla_put_failure:
9167         genlmsg_cancel(msg, hdr);
9168         nlmsg_free(msg);
9169 }
9170
9171 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9172                                     struct net_device *netdev,
9173                                     const u8 *buf, size_t len,
9174                                     enum nl80211_commands cmd, gfp_t gfp)
9175 {
9176         struct sk_buff *msg;
9177         void *hdr;
9178
9179         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9180         if (!msg)
9181                 return;
9182
9183         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9184         if (!hdr) {
9185                 nlmsg_free(msg);
9186                 return;
9187         }
9188
9189         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9190             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9191             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9192                 goto nla_put_failure;
9193
9194         genlmsg_end(msg, hdr);
9195
9196         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9197                                 nl80211_mlme_mcgrp.id, gfp);
9198         return;
9199
9200  nla_put_failure:
9201         genlmsg_cancel(msg, hdr);
9202         nlmsg_free(msg);
9203 }
9204
9205 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9206                           struct net_device *netdev, const u8 *buf,
9207                           size_t len, gfp_t gfp)
9208 {
9209         nl80211_send_mlme_event(rdev, netdev, buf, len,
9210                                 NL80211_CMD_AUTHENTICATE, gfp);
9211 }
9212
9213 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9214                            struct net_device *netdev, const u8 *buf,
9215                            size_t len, gfp_t gfp)
9216 {
9217         nl80211_send_mlme_event(rdev, netdev, buf, len,
9218                                 NL80211_CMD_ASSOCIATE, gfp);
9219 }
9220
9221 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9222                          struct net_device *netdev, const u8 *buf,
9223                          size_t len, gfp_t gfp)
9224 {
9225         nl80211_send_mlme_event(rdev, netdev, buf, len,
9226                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9227 }
9228
9229 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9230                            struct net_device *netdev, const u8 *buf,
9231                            size_t len, gfp_t gfp)
9232 {
9233         nl80211_send_mlme_event(rdev, netdev, buf, len,
9234                                 NL80211_CMD_DISASSOCIATE, gfp);
9235 }
9236
9237 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
9238                                  size_t len)
9239 {
9240         struct wireless_dev *wdev = dev->ieee80211_ptr;
9241         struct wiphy *wiphy = wdev->wiphy;
9242         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9243
9244         trace_cfg80211_send_unprot_deauth(dev);
9245         nl80211_send_mlme_event(rdev, dev, buf, len,
9246                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, GFP_ATOMIC);
9247 }
9248 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
9249
9250 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
9251                                    size_t len)
9252 {
9253         struct wireless_dev *wdev = dev->ieee80211_ptr;
9254         struct wiphy *wiphy = wdev->wiphy;
9255         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9256
9257         trace_cfg80211_send_unprot_disassoc(dev);
9258         nl80211_send_mlme_event(rdev, dev, buf, len,
9259                                 NL80211_CMD_UNPROT_DISASSOCIATE, GFP_ATOMIC);
9260 }
9261 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
9262
9263 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9264                                       struct net_device *netdev, int cmd,
9265                                       const u8 *addr, gfp_t gfp)
9266 {
9267         struct sk_buff *msg;
9268         void *hdr;
9269
9270         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9271         if (!msg)
9272                 return;
9273
9274         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9275         if (!hdr) {
9276                 nlmsg_free(msg);
9277                 return;
9278         }
9279
9280         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9281             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9282             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9283             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9284                 goto nla_put_failure;
9285
9286         genlmsg_end(msg, hdr);
9287
9288         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9289                                 nl80211_mlme_mcgrp.id, gfp);
9290         return;
9291
9292  nla_put_failure:
9293         genlmsg_cancel(msg, hdr);
9294         nlmsg_free(msg);
9295 }
9296
9297 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9298                                struct net_device *netdev, const u8 *addr,
9299                                gfp_t gfp)
9300 {
9301         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9302                                   addr, gfp);
9303 }
9304
9305 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9306                                 struct net_device *netdev, const u8 *addr,
9307                                 gfp_t gfp)
9308 {
9309         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9310                                   addr, gfp);
9311 }
9312
9313 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9314                                  struct net_device *netdev, const u8 *bssid,
9315                                  const u8 *req_ie, size_t req_ie_len,
9316                                  const u8 *resp_ie, size_t resp_ie_len,
9317                                  u16 status, gfp_t gfp)
9318 {
9319         struct sk_buff *msg;
9320         void *hdr;
9321
9322         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9323         if (!msg)
9324                 return;
9325
9326         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9327         if (!hdr) {
9328                 nlmsg_free(msg);
9329                 return;
9330         }
9331
9332         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9333             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9334             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9335             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9336             (req_ie &&
9337              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9338             (resp_ie &&
9339              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9340                 goto nla_put_failure;
9341
9342         genlmsg_end(msg, hdr);
9343
9344         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9345                                 nl80211_mlme_mcgrp.id, gfp);
9346         return;
9347
9348  nla_put_failure:
9349         genlmsg_cancel(msg, hdr);
9350         nlmsg_free(msg);
9351
9352 }
9353
9354 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9355                          struct net_device *netdev, const u8 *bssid,
9356                          const u8 *req_ie, size_t req_ie_len,
9357                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9358 {
9359         struct sk_buff *msg;
9360         void *hdr;
9361
9362         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9363         if (!msg)
9364                 return;
9365
9366         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9367         if (!hdr) {
9368                 nlmsg_free(msg);
9369                 return;
9370         }
9371
9372         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9373             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9374             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9375             (req_ie &&
9376              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9377             (resp_ie &&
9378              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9379                 goto nla_put_failure;
9380
9381         genlmsg_end(msg, hdr);
9382
9383         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9384                                 nl80211_mlme_mcgrp.id, gfp);
9385         return;
9386
9387  nla_put_failure:
9388         genlmsg_cancel(msg, hdr);
9389         nlmsg_free(msg);
9390
9391 }
9392
9393 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9394                                struct net_device *netdev, u16 reason,
9395                                const u8 *ie, size_t ie_len, bool from_ap)
9396 {
9397         struct sk_buff *msg;
9398         void *hdr;
9399
9400         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9401         if (!msg)
9402                 return;
9403
9404         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9405         if (!hdr) {
9406                 nlmsg_free(msg);
9407                 return;
9408         }
9409
9410         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9411             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9412             (from_ap && reason &&
9413              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9414             (from_ap &&
9415              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9416             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9417                 goto nla_put_failure;
9418
9419         genlmsg_end(msg, hdr);
9420
9421         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9422                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9423         return;
9424
9425  nla_put_failure:
9426         genlmsg_cancel(msg, hdr);
9427         nlmsg_free(msg);
9428
9429 }
9430
9431 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9432                              struct net_device *netdev, const u8 *bssid,
9433                              gfp_t gfp)
9434 {
9435         struct sk_buff *msg;
9436         void *hdr;
9437
9438         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9439         if (!msg)
9440                 return;
9441
9442         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9443         if (!hdr) {
9444                 nlmsg_free(msg);
9445                 return;
9446         }
9447
9448         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9449             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9450             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9451                 goto nla_put_failure;
9452
9453         genlmsg_end(msg, hdr);
9454
9455         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9456                                 nl80211_mlme_mcgrp.id, gfp);
9457         return;
9458
9459  nla_put_failure:
9460         genlmsg_cancel(msg, hdr);
9461         nlmsg_free(msg);
9462 }
9463
9464 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9465                                         const u8* ie, u8 ie_len, gfp_t gfp)
9466 {
9467         struct wireless_dev *wdev = dev->ieee80211_ptr;
9468         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9469         struct sk_buff *msg;
9470         void *hdr;
9471
9472         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9473                 return;
9474
9475         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9476
9477         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9478         if (!msg)
9479                 return;
9480
9481         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9482         if (!hdr) {
9483                 nlmsg_free(msg);
9484                 return;
9485         }
9486
9487         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9488             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9489             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9490             (ie_len && ie &&
9491              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9492                 goto nla_put_failure;
9493
9494         genlmsg_end(msg, hdr);
9495
9496         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9497                                 nl80211_mlme_mcgrp.id, gfp);
9498         return;
9499
9500  nla_put_failure:
9501         genlmsg_cancel(msg, hdr);
9502         nlmsg_free(msg);
9503 }
9504 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9505
9506 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9507                                  struct net_device *netdev, const u8 *addr,
9508                                  enum nl80211_key_type key_type, int key_id,
9509                                  const u8 *tsc, gfp_t gfp)
9510 {
9511         struct sk_buff *msg;
9512         void *hdr;
9513
9514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9515         if (!msg)
9516                 return;
9517
9518         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9519         if (!hdr) {
9520                 nlmsg_free(msg);
9521                 return;
9522         }
9523
9524         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9525             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9526             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9527             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9528             (key_id != -1 &&
9529              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9530             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9531                 goto nla_put_failure;
9532
9533         genlmsg_end(msg, hdr);
9534
9535         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9536                                 nl80211_mlme_mcgrp.id, gfp);
9537         return;
9538
9539  nla_put_failure:
9540         genlmsg_cancel(msg, hdr);
9541         nlmsg_free(msg);
9542 }
9543
9544 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9545                                     struct ieee80211_channel *channel_before,
9546                                     struct ieee80211_channel *channel_after)
9547 {
9548         struct sk_buff *msg;
9549         void *hdr;
9550         struct nlattr *nl_freq;
9551
9552         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9553         if (!msg)
9554                 return;
9555
9556         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9557         if (!hdr) {
9558                 nlmsg_free(msg);
9559                 return;
9560         }
9561
9562         /*
9563          * Since we are applying the beacon hint to a wiphy we know its
9564          * wiphy_idx is valid
9565          */
9566         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9567                 goto nla_put_failure;
9568
9569         /* Before */
9570         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9571         if (!nl_freq)
9572                 goto nla_put_failure;
9573         if (nl80211_msg_put_channel(msg, channel_before, false))
9574                 goto nla_put_failure;
9575         nla_nest_end(msg, nl_freq);
9576
9577         /* After */
9578         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9579         if (!nl_freq)
9580                 goto nla_put_failure;
9581         if (nl80211_msg_put_channel(msg, channel_after, false))
9582                 goto nla_put_failure;
9583         nla_nest_end(msg, nl_freq);
9584
9585         genlmsg_end(msg, hdr);
9586
9587         rcu_read_lock();
9588         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9589                                 GFP_ATOMIC);
9590         rcu_read_unlock();
9591
9592         return;
9593
9594 nla_put_failure:
9595         genlmsg_cancel(msg, hdr);
9596         nlmsg_free(msg);
9597 }
9598
9599 static void nl80211_send_remain_on_chan_event(
9600         int cmd, struct cfg80211_registered_device *rdev,
9601         struct wireless_dev *wdev, u64 cookie,
9602         struct ieee80211_channel *chan,
9603         unsigned int duration, gfp_t gfp)
9604 {
9605         struct sk_buff *msg;
9606         void *hdr;
9607
9608         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9609         if (!msg)
9610                 return;
9611
9612         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9613         if (!hdr) {
9614                 nlmsg_free(msg);
9615                 return;
9616         }
9617
9618         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9619             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9620                                          wdev->netdev->ifindex)) ||
9621             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9622             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9623             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9624                         NL80211_CHAN_NO_HT) ||
9625             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9626                 goto nla_put_failure;
9627
9628         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9629             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9630                 goto nla_put_failure;
9631
9632         genlmsg_end(msg, hdr);
9633
9634         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9635                                 nl80211_mlme_mcgrp.id, gfp);
9636         return;
9637
9638  nla_put_failure:
9639         genlmsg_cancel(msg, hdr);
9640         nlmsg_free(msg);
9641 }
9642
9643 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9644                                struct ieee80211_channel *chan,
9645                                unsigned int duration, gfp_t gfp)
9646 {
9647         struct wiphy *wiphy = wdev->wiphy;
9648         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9649
9650         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9651         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9652                                           rdev, wdev, cookie, chan,
9653                                           duration, gfp);
9654 }
9655 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9656
9657 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9658                                         struct ieee80211_channel *chan,
9659                                         gfp_t gfp)
9660 {
9661         struct wiphy *wiphy = wdev->wiphy;
9662         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9663
9664         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9665         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9666                                           rdev, wdev, cookie, chan, 0, gfp);
9667 }
9668 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9669
9670 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9671                       struct station_info *sinfo, gfp_t gfp)
9672 {
9673         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9674         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9675         struct sk_buff *msg;
9676
9677         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9678
9679         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9680         if (!msg)
9681                 return;
9682
9683         if (nl80211_send_station(msg, 0, 0, 0,
9684                                  rdev, dev, mac_addr, sinfo) < 0) {
9685                 nlmsg_free(msg);
9686                 return;
9687         }
9688
9689         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9690                                 nl80211_mlme_mcgrp.id, gfp);
9691 }
9692 EXPORT_SYMBOL(cfg80211_new_sta);
9693
9694 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9695 {
9696         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9697         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9698         struct sk_buff *msg;
9699         void *hdr;
9700
9701         trace_cfg80211_del_sta(dev, mac_addr);
9702
9703         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9704         if (!msg)
9705                 return;
9706
9707         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9708         if (!hdr) {
9709                 nlmsg_free(msg);
9710                 return;
9711         }
9712
9713         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9714             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9715                 goto nla_put_failure;
9716
9717         genlmsg_end(msg, hdr);
9718
9719         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9720                                 nl80211_mlme_mcgrp.id, gfp);
9721         return;
9722
9723  nla_put_failure:
9724         genlmsg_cancel(msg, hdr);
9725         nlmsg_free(msg);
9726 }
9727 EXPORT_SYMBOL(cfg80211_del_sta);
9728
9729 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9730                           enum nl80211_connect_failed_reason reason,
9731                           gfp_t gfp)
9732 {
9733         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9734         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9735         struct sk_buff *msg;
9736         void *hdr;
9737
9738         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9739         if (!msg)
9740                 return;
9741
9742         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9743         if (!hdr) {
9744                 nlmsg_free(msg);
9745                 return;
9746         }
9747
9748         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9749             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9750             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9751                 goto nla_put_failure;
9752
9753         genlmsg_end(msg, hdr);
9754
9755         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9756                                 nl80211_mlme_mcgrp.id, gfp);
9757         return;
9758
9759  nla_put_failure:
9760         genlmsg_cancel(msg, hdr);
9761         nlmsg_free(msg);
9762 }
9763 EXPORT_SYMBOL(cfg80211_conn_failed);
9764
9765 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9766                                        const u8 *addr, gfp_t gfp)
9767 {
9768         struct wireless_dev *wdev = dev->ieee80211_ptr;
9769         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9770         struct sk_buff *msg;
9771         void *hdr;
9772         int err;
9773         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9774
9775         if (!nlportid)
9776                 return false;
9777
9778         msg = nlmsg_new(100, gfp);
9779         if (!msg)
9780                 return true;
9781
9782         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9783         if (!hdr) {
9784                 nlmsg_free(msg);
9785                 return true;
9786         }
9787
9788         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9789             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9790             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9791                 goto nla_put_failure;
9792
9793         err = genlmsg_end(msg, hdr);
9794         if (err < 0) {
9795                 nlmsg_free(msg);
9796                 return true;
9797         }
9798
9799         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9800         return true;
9801
9802  nla_put_failure:
9803         genlmsg_cancel(msg, hdr);
9804         nlmsg_free(msg);
9805         return true;
9806 }
9807
9808 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9809                                 const u8 *addr, gfp_t gfp)
9810 {
9811         struct wireless_dev *wdev = dev->ieee80211_ptr;
9812         bool ret;
9813
9814         trace_cfg80211_rx_spurious_frame(dev, addr);
9815
9816         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9817                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9818                 trace_cfg80211_return_bool(false);
9819                 return false;
9820         }
9821         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9822                                          addr, gfp);
9823         trace_cfg80211_return_bool(ret);
9824         return ret;
9825 }
9826 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9827
9828 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9829                                         const u8 *addr, gfp_t gfp)
9830 {
9831         struct wireless_dev *wdev = dev->ieee80211_ptr;
9832         bool ret;
9833
9834         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9835
9836         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9837                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9838                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9839                 trace_cfg80211_return_bool(false);
9840                 return false;
9841         }
9842         ret = __nl80211_unexpected_frame(dev,
9843                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9844                                          addr, gfp);
9845         trace_cfg80211_return_bool(ret);
9846         return ret;
9847 }
9848 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9849
9850 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9851                       struct wireless_dev *wdev, u32 nlportid,
9852                       int freq, int sig_dbm,
9853                       const u8 *buf, size_t len, gfp_t gfp)
9854 {
9855         struct net_device *netdev = wdev->netdev;
9856         struct sk_buff *msg;
9857         void *hdr;
9858
9859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9860         if (!msg)
9861                 return -ENOMEM;
9862
9863         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9864         if (!hdr) {
9865                 nlmsg_free(msg);
9866                 return -ENOMEM;
9867         }
9868
9869         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9870             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9871                                         netdev->ifindex)) ||
9872             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9873             (sig_dbm &&
9874              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9875             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9876                 goto nla_put_failure;
9877
9878         genlmsg_end(msg, hdr);
9879
9880         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9881
9882  nla_put_failure:
9883         genlmsg_cancel(msg, hdr);
9884         nlmsg_free(msg);
9885         return -ENOBUFS;
9886 }
9887
9888 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9889                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9890 {
9891         struct wiphy *wiphy = wdev->wiphy;
9892         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9893         struct net_device *netdev = wdev->netdev;
9894         struct sk_buff *msg;
9895         void *hdr;
9896
9897         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
9898
9899         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9900         if (!msg)
9901                 return;
9902
9903         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9904         if (!hdr) {
9905                 nlmsg_free(msg);
9906                 return;
9907         }
9908
9909         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9910             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9911                                    netdev->ifindex)) ||
9912             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9913             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9914             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9915                 goto nla_put_failure;
9916
9917         genlmsg_end(msg, hdr);
9918
9919         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9920         return;
9921
9922  nla_put_failure:
9923         genlmsg_cancel(msg, hdr);
9924         nlmsg_free(msg);
9925 }
9926 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
9927
9928 void cfg80211_cqm_rssi_notify(struct net_device *dev,
9929                               enum nl80211_cqm_rssi_threshold_event rssi_event,
9930                               gfp_t gfp)
9931 {
9932         struct wireless_dev *wdev = dev->ieee80211_ptr;
9933         struct wiphy *wiphy = wdev->wiphy;
9934         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9935         struct sk_buff *msg;
9936         struct nlattr *pinfoattr;
9937         void *hdr;
9938
9939         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
9940
9941         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9942         if (!msg)
9943                 return;
9944
9945         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9946         if (!hdr) {
9947                 nlmsg_free(msg);
9948                 return;
9949         }
9950
9951         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9952             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
9953                 goto nla_put_failure;
9954
9955         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9956         if (!pinfoattr)
9957                 goto nla_put_failure;
9958
9959         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9960                         rssi_event))
9961                 goto nla_put_failure;
9962
9963         nla_nest_end(msg, pinfoattr);
9964
9965         genlmsg_end(msg, hdr);
9966
9967         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9968                                 nl80211_mlme_mcgrp.id, gfp);
9969         return;
9970
9971  nla_put_failure:
9972         genlmsg_cancel(msg, hdr);
9973         nlmsg_free(msg);
9974 }
9975 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
9976
9977 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9978                                      struct net_device *netdev, const u8 *bssid,
9979                                      const u8 *replay_ctr, gfp_t gfp)
9980 {
9981         struct sk_buff *msg;
9982         struct nlattr *rekey_attr;
9983         void *hdr;
9984
9985         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9986         if (!msg)
9987                 return;
9988
9989         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9990         if (!hdr) {
9991                 nlmsg_free(msg);
9992                 return;
9993         }
9994
9995         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9996             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9997             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9998                 goto nla_put_failure;
9999
10000         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10001         if (!rekey_attr)
10002                 goto nla_put_failure;
10003
10004         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10005                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10006                 goto nla_put_failure;
10007
10008         nla_nest_end(msg, rekey_attr);
10009
10010         genlmsg_end(msg, hdr);
10011
10012         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10013                                 nl80211_mlme_mcgrp.id, gfp);
10014         return;
10015
10016  nla_put_failure:
10017         genlmsg_cancel(msg, hdr);
10018         nlmsg_free(msg);
10019 }
10020
10021 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10022                                const u8 *replay_ctr, gfp_t gfp)
10023 {
10024         struct wireless_dev *wdev = dev->ieee80211_ptr;
10025         struct wiphy *wiphy = wdev->wiphy;
10026         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10027
10028         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10029         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10030 }
10031 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10032
10033 static void
10034 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10035                                struct net_device *netdev, int index,
10036                                const u8 *bssid, bool preauth, gfp_t gfp)
10037 {
10038         struct sk_buff *msg;
10039         struct nlattr *attr;
10040         void *hdr;
10041
10042         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10043         if (!msg)
10044                 return;
10045
10046         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10047         if (!hdr) {
10048                 nlmsg_free(msg);
10049                 return;
10050         }
10051
10052         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10053             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10054                 goto nla_put_failure;
10055
10056         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10057         if (!attr)
10058                 goto nla_put_failure;
10059
10060         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10061             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10062             (preauth &&
10063              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10064                 goto nla_put_failure;
10065
10066         nla_nest_end(msg, attr);
10067
10068         genlmsg_end(msg, hdr);
10069
10070         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10071                                 nl80211_mlme_mcgrp.id, gfp);
10072         return;
10073
10074  nla_put_failure:
10075         genlmsg_cancel(msg, hdr);
10076         nlmsg_free(msg);
10077 }
10078
10079 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10080                                      const u8 *bssid, bool preauth, gfp_t gfp)
10081 {
10082         struct wireless_dev *wdev = dev->ieee80211_ptr;
10083         struct wiphy *wiphy = wdev->wiphy;
10084         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10085
10086         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10087         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10088 }
10089 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10090
10091 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10092                                      struct net_device *netdev,
10093                                      struct cfg80211_chan_def *chandef,
10094                                      gfp_t gfp)
10095 {
10096         struct sk_buff *msg;
10097         void *hdr;
10098
10099         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10100         if (!msg)
10101                 return;
10102
10103         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10104         if (!hdr) {
10105                 nlmsg_free(msg);
10106                 return;
10107         }
10108
10109         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10110                 goto nla_put_failure;
10111
10112         if (nl80211_send_chandef(msg, chandef))
10113                 goto nla_put_failure;
10114
10115         genlmsg_end(msg, hdr);
10116
10117         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10118                                 nl80211_mlme_mcgrp.id, gfp);
10119         return;
10120
10121  nla_put_failure:
10122         genlmsg_cancel(msg, hdr);
10123         nlmsg_free(msg);
10124 }
10125
10126 void cfg80211_ch_switch_notify(struct net_device *dev,
10127                                struct cfg80211_chan_def *chandef)
10128 {
10129         struct wireless_dev *wdev = dev->ieee80211_ptr;
10130         struct wiphy *wiphy = wdev->wiphy;
10131         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10132
10133         trace_cfg80211_ch_switch_notify(dev, chandef);
10134
10135         wdev_lock(wdev);
10136
10137         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10138                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10139                 goto out;
10140
10141         wdev->channel = chandef->chan;
10142         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10143 out:
10144         wdev_unlock(wdev);
10145         return;
10146 }
10147 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10148
10149 void cfg80211_cqm_txe_notify(struct net_device *dev,
10150                              const u8 *peer, u32 num_packets,
10151                              u32 rate, u32 intvl, gfp_t gfp)
10152 {
10153         struct wireless_dev *wdev = dev->ieee80211_ptr;
10154         struct wiphy *wiphy = wdev->wiphy;
10155         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10156         struct sk_buff *msg;
10157         struct nlattr *pinfoattr;
10158         void *hdr;
10159
10160         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10161         if (!msg)
10162                 return;
10163
10164         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10165         if (!hdr) {
10166                 nlmsg_free(msg);
10167                 return;
10168         }
10169
10170         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10171             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10172             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10173                 goto nla_put_failure;
10174
10175         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10176         if (!pinfoattr)
10177                 goto nla_put_failure;
10178
10179         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10180                 goto nla_put_failure;
10181
10182         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10183                 goto nla_put_failure;
10184
10185         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10186                 goto nla_put_failure;
10187
10188         nla_nest_end(msg, pinfoattr);
10189
10190         genlmsg_end(msg, hdr);
10191
10192         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10193                                 nl80211_mlme_mcgrp.id, gfp);
10194         return;
10195
10196  nla_put_failure:
10197         genlmsg_cancel(msg, hdr);
10198         nlmsg_free(msg);
10199 }
10200 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10201
10202 void
10203 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10204                      struct cfg80211_chan_def *chandef,
10205                      enum nl80211_radar_event event,
10206                      struct net_device *netdev, gfp_t gfp)
10207 {
10208         struct sk_buff *msg;
10209         void *hdr;
10210
10211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10212         if (!msg)
10213                 return;
10214
10215         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10216         if (!hdr) {
10217                 nlmsg_free(msg);
10218                 return;
10219         }
10220
10221         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10222                 goto nla_put_failure;
10223
10224         /* NOP and radar events don't need a netdev parameter */
10225         if (netdev) {
10226                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10227
10228                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10229                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10230                         goto nla_put_failure;
10231         }
10232
10233         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10234                 goto nla_put_failure;
10235
10236         if (nl80211_send_chandef(msg, chandef))
10237                 goto nla_put_failure;
10238
10239         if (genlmsg_end(msg, hdr) < 0) {
10240                 nlmsg_free(msg);
10241                 return;
10242         }
10243
10244         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10245                                 nl80211_mlme_mcgrp.id, gfp);
10246         return;
10247
10248  nla_put_failure:
10249         genlmsg_cancel(msg, hdr);
10250         nlmsg_free(msg);
10251 }
10252
10253 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10254                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10255 {
10256         struct wireless_dev *wdev = dev->ieee80211_ptr;
10257         struct wiphy *wiphy = wdev->wiphy;
10258         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10259         struct sk_buff *msg;
10260         struct nlattr *pinfoattr;
10261         void *hdr;
10262
10263         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10264
10265         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10266         if (!msg)
10267                 return;
10268
10269         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10270         if (!hdr) {
10271                 nlmsg_free(msg);
10272                 return;
10273         }
10274
10275         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10276             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10277             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10278                 goto nla_put_failure;
10279
10280         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10281         if (!pinfoattr)
10282                 goto nla_put_failure;
10283
10284         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10285                 goto nla_put_failure;
10286
10287         nla_nest_end(msg, pinfoattr);
10288
10289         genlmsg_end(msg, hdr);
10290
10291         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10292                                 nl80211_mlme_mcgrp.id, gfp);
10293         return;
10294
10295  nla_put_failure:
10296         genlmsg_cancel(msg, hdr);
10297         nlmsg_free(msg);
10298 }
10299 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10300
10301 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10302                            u64 cookie, bool acked, gfp_t gfp)
10303 {
10304         struct wireless_dev *wdev = dev->ieee80211_ptr;
10305         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10306         struct sk_buff *msg;
10307         void *hdr;
10308         int err;
10309
10310         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10311
10312         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10313
10314         if (!msg)
10315                 return;
10316
10317         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10318         if (!hdr) {
10319                 nlmsg_free(msg);
10320                 return;
10321         }
10322
10323         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10324             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10325             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10326             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10327             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10328                 goto nla_put_failure;
10329
10330         err = genlmsg_end(msg, hdr);
10331         if (err < 0) {
10332                 nlmsg_free(msg);
10333                 return;
10334         }
10335
10336         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10337                                 nl80211_mlme_mcgrp.id, gfp);
10338         return;
10339
10340  nla_put_failure:
10341         genlmsg_cancel(msg, hdr);
10342         nlmsg_free(msg);
10343 }
10344 EXPORT_SYMBOL(cfg80211_probe_status);
10345
10346 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10347                                  const u8 *frame, size_t len,
10348                                  int freq, int sig_dbm)
10349 {
10350         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10351         struct sk_buff *msg;
10352         void *hdr;
10353         struct cfg80211_beacon_registration *reg;
10354
10355         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10356
10357         spin_lock_bh(&rdev->beacon_registrations_lock);
10358         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10359                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10360                 if (!msg) {
10361                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10362                         return;
10363                 }
10364
10365                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10366                 if (!hdr)
10367                         goto nla_put_failure;
10368
10369                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10370                     (freq &&
10371                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10372                     (sig_dbm &&
10373                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10374                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10375                         goto nla_put_failure;
10376
10377                 genlmsg_end(msg, hdr);
10378
10379                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10380         }
10381         spin_unlock_bh(&rdev->beacon_registrations_lock);
10382         return;
10383
10384  nla_put_failure:
10385         spin_unlock_bh(&rdev->beacon_registrations_lock);
10386         if (hdr)
10387                 genlmsg_cancel(msg, hdr);
10388         nlmsg_free(msg);
10389 }
10390 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10391
10392 #ifdef CONFIG_PM
10393 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10394                                    struct cfg80211_wowlan_wakeup *wakeup,
10395                                    gfp_t gfp)
10396 {
10397         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10398         struct sk_buff *msg;
10399         void *hdr;
10400         int err, size = 200;
10401
10402         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10403
10404         if (wakeup)
10405                 size += wakeup->packet_present_len;
10406
10407         msg = nlmsg_new(size, gfp);
10408         if (!msg)
10409                 return;
10410
10411         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10412         if (!hdr)
10413                 goto free_msg;
10414
10415         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10416             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10417                 goto free_msg;
10418
10419         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10420                                         wdev->netdev->ifindex))
10421                 goto free_msg;
10422
10423         if (wakeup) {
10424                 struct nlattr *reasons;
10425
10426                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10427
10428                 if (wakeup->disconnect &&
10429                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10430                         goto free_msg;
10431                 if (wakeup->magic_pkt &&
10432                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10433                         goto free_msg;
10434                 if (wakeup->gtk_rekey_failure &&
10435                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10436                         goto free_msg;
10437                 if (wakeup->eap_identity_req &&
10438                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10439                         goto free_msg;
10440                 if (wakeup->four_way_handshake &&
10441                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10442                         goto free_msg;
10443                 if (wakeup->rfkill_release &&
10444                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10445                         goto free_msg;
10446
10447                 if (wakeup->pattern_idx >= 0 &&
10448                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10449                                 wakeup->pattern_idx))
10450                         goto free_msg;
10451
10452                 if (wakeup->tcp_match)
10453                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10454
10455                 if (wakeup->tcp_connlost)
10456                         nla_put_flag(msg,
10457                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10458
10459                 if (wakeup->tcp_nomoretokens)
10460                         nla_put_flag(msg,
10461                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10462
10463                 if (wakeup->packet) {
10464                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10465                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10466
10467                         if (!wakeup->packet_80211) {
10468                                 pkt_attr =
10469                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10470                                 len_attr =
10471                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10472                         }
10473
10474                         if (wakeup->packet_len &&
10475                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10476                                 goto free_msg;
10477
10478                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10479                                     wakeup->packet))
10480                                 goto free_msg;
10481                 }
10482
10483                 nla_nest_end(msg, reasons);
10484         }
10485
10486         err = genlmsg_end(msg, hdr);
10487         if (err < 0)
10488                 goto free_msg;
10489
10490         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10491                                 nl80211_mlme_mcgrp.id, gfp);
10492         return;
10493
10494  free_msg:
10495         nlmsg_free(msg);
10496 }
10497 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10498 #endif
10499
10500 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10501                                 enum nl80211_tdls_operation oper,
10502                                 u16 reason_code, gfp_t gfp)
10503 {
10504         struct wireless_dev *wdev = dev->ieee80211_ptr;
10505         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10506         struct sk_buff *msg;
10507         void *hdr;
10508         int err;
10509
10510         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10511                                          reason_code);
10512
10513         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10514         if (!msg)
10515                 return;
10516
10517         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10518         if (!hdr) {
10519                 nlmsg_free(msg);
10520                 return;
10521         }
10522
10523         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10524             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10525             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10526             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10527             (reason_code > 0 &&
10528              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10529                 goto nla_put_failure;
10530
10531         err = genlmsg_end(msg, hdr);
10532         if (err < 0) {
10533                 nlmsg_free(msg);
10534                 return;
10535         }
10536
10537         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10538                                 nl80211_mlme_mcgrp.id, gfp);
10539         return;
10540
10541  nla_put_failure:
10542         genlmsg_cancel(msg, hdr);
10543         nlmsg_free(msg);
10544 }
10545 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10546
10547 static int nl80211_netlink_notify(struct notifier_block * nb,
10548                                   unsigned long state,
10549                                   void *_notify)
10550 {
10551         struct netlink_notify *notify = _notify;
10552         struct cfg80211_registered_device *rdev;
10553         struct wireless_dev *wdev;
10554         struct cfg80211_beacon_registration *reg, *tmp;
10555
10556         if (state != NETLINK_URELEASE)
10557                 return NOTIFY_DONE;
10558
10559         rcu_read_lock();
10560
10561         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10562                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10563                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10564
10565                 spin_lock_bh(&rdev->beacon_registrations_lock);
10566                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10567                                          list) {
10568                         if (reg->nlportid == notify->portid) {
10569                                 list_del(&reg->list);
10570                                 kfree(reg);
10571                                 break;
10572                         }
10573                 }
10574                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10575         }
10576
10577         rcu_read_unlock();
10578
10579         return NOTIFY_DONE;
10580 }
10581
10582 static struct notifier_block nl80211_netlink_notifier = {
10583         .notifier_call = nl80211_netlink_notify,
10584 };
10585
10586 void cfg80211_ft_event(struct net_device *netdev,
10587                        struct cfg80211_ft_event_params *ft_event)
10588 {
10589         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10590         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10591         struct sk_buff *msg;
10592         void *hdr;
10593         int err;
10594
10595         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10596
10597         if (!ft_event->target_ap)
10598                 return;
10599
10600         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10601         if (!msg)
10602                 return;
10603
10604         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10605         if (!hdr) {
10606                 nlmsg_free(msg);
10607                 return;
10608         }
10609
10610         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10611         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10612         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10613         if (ft_event->ies)
10614                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10615         if (ft_event->ric_ies)
10616                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10617                         ft_event->ric_ies);
10618
10619         err = genlmsg_end(msg, hdr);
10620         if (err < 0) {
10621                 nlmsg_free(msg);
10622                 return;
10623         }
10624
10625         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10626                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10627 }
10628 EXPORT_SYMBOL(cfg80211_ft_event);
10629
10630 /* initialisation/exit functions */
10631
10632 int nl80211_init(void)
10633 {
10634         int err;
10635
10636         err = genl_register_family_with_ops(&nl80211_fam,
10637                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10638         if (err)
10639                 return err;
10640
10641         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10642         if (err)
10643                 goto err_out;
10644
10645         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10646         if (err)
10647                 goto err_out;
10648
10649         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10650         if (err)
10651                 goto err_out;
10652
10653         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10654         if (err)
10655                 goto err_out;
10656
10657 #ifdef CONFIG_NL80211_TESTMODE
10658         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10659         if (err)
10660                 goto err_out;
10661 #endif
10662
10663         err = netlink_register_notifier(&nl80211_netlink_notifier);
10664         if (err)
10665                 goto err_out;
10666
10667         return 0;
10668  err_out:
10669         genl_unregister_family(&nl80211_fam);
10670         return err;
10671 }
10672
10673 void nl80211_exit(void)
10674 {
10675         netlink_unregister_notifier(&nl80211_netlink_notifier);
10676         genl_unregister_family(&nl80211_fam);
10677 }