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

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <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 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 451                                      struct netlink_callback *cb,
 452                                      struct cfg80211_registered_device **rdev,
 453                                      struct wireless_dev **wdev)
 454 {
 455         int err;
 456
 457         rtnl_lock();
 458         mutex_lock(&cfg80211_mutex);
 459
 460         if (!cb->args[0]) {
 461                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 462                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 463                                   nl80211_policy);
 464                 if (err)
 465                         goto out_unlock;
 466
 467                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 468                                                    nl80211_fam.attrbuf);
 469                 if (IS_ERR(*wdev)) {
 470                         err = PTR_ERR(*wdev);
 471                         goto out_unlock;
 472                 }
 473                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 474                 cb->args[0] = (*rdev)->wiphy_idx;
 475                 cb->args[1] = (*wdev)->identifier;
 476         } else {
 477                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
 478                 struct wireless_dev *tmp;
 479
 480                 if (!wiphy) {
 481                         err = -ENODEV;
 482                         goto out_unlock;
 483                 }
 484                 *rdev = wiphy_to_dev(wiphy);
 485                 *wdev = NULL;
 486
 487                 mutex_lock(&(*rdev)->devlist_mtx);
 488                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 489                         if (tmp->identifier == cb->args[1]) {
 490                                 *wdev = tmp;
 491                                 break;
 492                         }
 493                 }
 494                 mutex_unlock(&(*rdev)->devlist_mtx);
 495
 496                 if (!*wdev) {
 497                         err = -ENODEV;
 498                         goto out_unlock;
 499                 }
 500         }
 501
 502         cfg80211_lock_rdev(*rdev);
 503
 504         mutex_unlock(&cfg80211_mutex);
 505         return 0;
 506  out_unlock:
 507         mutex_unlock(&cfg80211_mutex);
 508         rtnl_unlock();
 509         return err;
 510 }
 511
 512 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 513 {
 514         cfg80211_unlock_rdev(rdev);
 515         rtnl_unlock();
 516 }
 517
 518 /* IE validation */
 519 static bool is_valid_ie_attr(const struct nlattr *attr)
 520 {
 521         const u8 *pos;
 522         int len;
 523
 524         if (!attr)
 525                 return true;
 526
 527         pos = nla_data(attr);
 528         len = nla_len(attr);
 529
 530         while (len) {
 531                 u8 elemlen;
 532
 533                 if (len < 2)
 534                         return false;
 535                 len -= 2;
 536
 537                 elemlen = pos[1];
 538                 if (elemlen > len)
 539                         return false;
 540
 541                 len -= elemlen;
 542                 pos += 2 + elemlen;
 543         }
 544
 545         return true;
 546 }
 547
 548 /* message building helper */
 549 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 550                                    int flags, u8 cmd)
 551 {
 552         /* since there is no private header just add the generic one */
 553         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 554 }
 555
 556 static int nl80211_msg_put_channel(struct sk_buff *msg,
 557                                    struct ieee80211_channel *chan,
 558                                    bool large)
 559 {
 560         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 561                         chan->center_freq))
 562                 goto nla_put_failure;
 563
 564         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 565             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 566                 goto nla_put_failure;
 567         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 568             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 569                 goto nla_put_failure;
 570         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 571             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 572                 goto nla_put_failure;
 573         if (chan->flags & IEEE80211_CHAN_RADAR) {
 574                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 575                         goto nla_put_failure;
 576                 if (large) {
 577                         u32 time;
 578
 579                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 580
 581                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 582                                         chan->dfs_state))
 583                                 goto nla_put_failure;
 584                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 585                                         time))
 586                                 goto nla_put_failure;
 587                 }
 588         }
 589
 590         if (large) {
 591                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 592                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 593                         goto nla_put_failure;
 594                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 595                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 596                         goto nla_put_failure;
 597                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 598                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 599                         goto nla_put_failure;
 600                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 601                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 602                         goto nla_put_failure;
 603         }
 604
 605         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 606                         DBM_TO_MBM(chan->max_power)))
 607                 goto nla_put_failure;
 608
 609         return 0;
 610
 611  nla_put_failure:
 612         return -ENOBUFS;
 613 }
 614
 615 /* netlink command implementations */
 616
 617 struct key_parse {
 618         struct key_params p;
 619         int idx;
 620         int type;
 621         bool def, defmgmt;
 622         bool def_uni, def_multi;
 623 };
 624
 625 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 626 {
 627         struct nlattr *tb[NL80211_KEY_MAX + 1];
 628         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 629                                    nl80211_key_policy);
 630         if (err)
 631                 return err;
 632
 633         k->def = !!tb[NL80211_KEY_DEFAULT];
 634         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 635
 636         if (k->def) {
 637                 k->def_uni = true;
 638                 k->def_multi = true;
 639         }
 640         if (k->defmgmt)
 641                 k->def_multi = true;
 642
 643         if (tb[NL80211_KEY_IDX])
 644                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 645
 646         if (tb[NL80211_KEY_DATA]) {
 647                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 648                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 649         }
 650
 651         if (tb[NL80211_KEY_SEQ]) {
 652                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 653                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 654         }
 655
 656         if (tb[NL80211_KEY_CIPHER])
 657                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 658
 659         if (tb[NL80211_KEY_TYPE]) {
 660                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 661                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 662                         return -EINVAL;
 663         }
 664
 665         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 666                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 667                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 668                                        tb[NL80211_KEY_DEFAULT_TYPES],
 669                                        nl80211_key_default_policy);
 670                 if (err)
 671                         return err;
 672
 673                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 674                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 675         }
 676
 677         return 0;
 678 }
 679
 680 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 681 {
 682         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 683                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 684                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 685         }
 686
 687         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 688                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 689                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 690         }
 691
 692         if (info->attrs[NL80211_ATTR_KEY_IDX])
 693                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 694
 695         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 696                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 697
 698         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 699         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 700
 701         if (k->def) {
 702                 k->def_uni = true;
 703                 k->def_multi = true;
 704         }
 705         if (k->defmgmt)
 706                 k->def_multi = true;
 707
 708         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 709                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 710                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 711                         return -EINVAL;
 712         }
 713
 714         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 715                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 716                 int err = nla_parse_nested(
 717                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 718                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 719                                 nl80211_key_default_policy);
 720                 if (err)
 721                         return err;
 722
 723                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 724                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 725         }
 726
 727         return 0;
 728 }
 729
 730 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 731 {
 732         int err;
 733
 734         memset(k, 0, sizeof(*k));
 735         k->idx = -1;
 736         k->type = -1;
 737
 738         if (info->attrs[NL80211_ATTR_KEY])
 739                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 740         else
 741                 err = nl80211_parse_key_old(info, k);
 742
 743         if (err)
 744                 return err;
 745
 746         if (k->def && k->defmgmt)
 747                 return -EINVAL;
 748
 749         if (k->defmgmt) {
 750                 if (k->def_uni || !k->def_multi)
 751                         return -EINVAL;
 752         }
 753
 754         if (k->idx != -1) {
 755                 if (k->defmgmt) {
 756                         if (k->idx < 4 || k->idx > 5)
 757                                 return -EINVAL;
 758                 } else if (k->def) {
 759                         if (k->idx < 0 || k->idx > 3)
 760                                 return -EINVAL;
 761                 } else {
 762                         if (k->idx < 0 || k->idx > 5)
 763                                 return -EINVAL;
 764                 }
 765         }
 766
 767         return 0;
 768 }
 769
 770 static struct cfg80211_cached_keys *
 771 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 772                        struct nlattr *keys, bool *no_ht)
 773 {
 774         struct key_parse parse;
 775         struct nlattr *key;
 776         struct cfg80211_cached_keys *result;
 777         int rem, err, def = 0;
 778
 779         result = kzalloc(sizeof(*result), GFP_KERNEL);
 780         if (!result)
 781                 return ERR_PTR(-ENOMEM);
 782
 783         result->def = -1;
 784         result->defmgmt = -1;
 785
 786         nla_for_each_nested(key, keys, rem) {
 787                 memset(&parse, 0, sizeof(parse));
 788                 parse.idx = -1;
 789
 790                 err = nl80211_parse_key_new(key, &parse);
 791                 if (err)
 792                         goto error;
 793                 err = -EINVAL;
 794                 if (!parse.p.key)
 795                         goto error;
 796                 if (parse.idx < 0 || parse.idx > 4)
 797                         goto error;
 798                 if (parse.def) {
 799                         if (def)
 800                                 goto error;
 801                         def = 1;
 802                         result->def = parse.idx;
 803                         if (!parse.def_uni || !parse.def_multi)
 804                                 goto error;
 805                 } else if (parse.defmgmt)
 806                         goto error;
 807                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 808                                                      parse.idx, false, NULL);
 809                 if (err)
 810                         goto error;
 811                 result->params[parse.idx].cipher = parse.p.cipher;
 812                 result->params[parse.idx].key_len = parse.p.key_len;
 813                 result->params[parse.idx].key = result->data[parse.idx];
 814                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 815
 816                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 817                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 818                         if (no_ht)
 819                                 *no_ht = true;
 820                 }
 821         }
 822
 823         return result;
 824  error:
 825         kfree(result);
 826         return ERR_PTR(err);
 827 }
 828
 829 static int nl80211_key_allowed(struct wireless_dev *wdev)
 830 {
 831         ASSERT_WDEV_LOCK(wdev);
 832
 833         switch (wdev->iftype) {
 834         case NL80211_IFTYPE_AP:
 835         case NL80211_IFTYPE_AP_VLAN:
 836         case NL80211_IFTYPE_P2P_GO:
 837         case NL80211_IFTYPE_MESH_POINT:
 838                 break;
 839         case NL80211_IFTYPE_ADHOC:
 840                 if (!wdev->current_bss)
 841                         return -ENOLINK;
 842                 break;
 843         case NL80211_IFTYPE_STATION:
 844         case NL80211_IFTYPE_P2P_CLIENT:
 845                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 846                         return -ENOLINK;
 847                 break;
 848         default:
 849                 return -EINVAL;
 850         }
 851
 852         return 0;
 853 }
 854
 855 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 856 {
 857         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 858         int i;
 859
 860         if (!nl_modes)
 861                 goto nla_put_failure;
 862
 863         i = 0;
 864         while (ifmodes) {
 865                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 866                         goto nla_put_failure;
 867                 ifmodes >>= 1;
 868                 i++;
 869         }
 870
 871         nla_nest_end(msg, nl_modes);
 872         return 0;
 873
 874 nla_put_failure:
 875         return -ENOBUFS;
 876 }
 877
 878 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 879                                           struct sk_buff *msg,
 880                                           bool large)
 881 {
 882         struct nlattr *nl_combis;
 883         int i, j;
 884
 885         nl_combis = nla_nest_start(msg,
 886                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 887         if (!nl_combis)
 888                 goto nla_put_failure;
 889
 890         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 891                 const struct ieee80211_iface_combination *c;
 892                 struct nlattr *nl_combi, *nl_limits;
 893
 894                 c = &wiphy->iface_combinations[i];
 895
 896                 nl_combi = nla_nest_start(msg, i + 1);
 897                 if (!nl_combi)
 898                         goto nla_put_failure;
 899
 900                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 901                 if (!nl_limits)
 902                         goto nla_put_failure;
 903
 904                 for (j = 0; j < c->n_limits; j++) {
 905                         struct nlattr *nl_limit;
 906
 907                         nl_limit = nla_nest_start(msg, j + 1);
 908                         if (!nl_limit)
 909                                 goto nla_put_failure;
 910                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 911                                         c->limits[j].max))
 912                                 goto nla_put_failure;
 913                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 914                                                 c->limits[j].types))
 915                                 goto nla_put_failure;
 916                         nla_nest_end(msg, nl_limit);
 917                 }
 918
 919                 nla_nest_end(msg, nl_limits);
 920
 921                 if (c->beacon_int_infra_match &&
 922                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 923                         goto nla_put_failure;
 924                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 925                                 c->num_different_channels) ||
 926                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 927                                 c->max_interfaces))
 928                         goto nla_put_failure;
 929                 if (large &&
 930                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 931                                 c->radar_detect_widths))
 932                         goto nla_put_failure;
 933
 934                 nla_nest_end(msg, nl_combi);
 935         }
 936
 937         nla_nest_end(msg, nl_combis);
 938
 939         return 0;
 940 nla_put_failure:
 941         return -ENOBUFS;
 942 }
 943
 944 #ifdef CONFIG_PM
 945 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 946                                         struct sk_buff *msg)
 947 {
 948         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 949         struct nlattr *nl_tcp;
 950
 951         if (!tcp)
 952                 return 0;
 953
 954         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 955         if (!nl_tcp)
 956                 return -ENOBUFS;
 957
 958         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 959                         tcp->data_payload_max))
 960                 return -ENOBUFS;
 961
 962         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 963                         tcp->data_payload_max))
 964                 return -ENOBUFS;
 965
 966         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 967                 return -ENOBUFS;
 968
 969         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 970                                 sizeof(*tcp->tok), tcp->tok))
 971                 return -ENOBUFS;
 972
 973         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 974                         tcp->data_interval_max))
 975                 return -ENOBUFS;
 976
 977         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 978                         tcp->wake_payload_max))
 979                 return -ENOBUFS;
 980
 981         nla_nest_end(msg, nl_tcp);
 982         return 0;
 983 }
 984
 985 static int nl80211_send_wowlan(struct sk_buff *msg,
 986                                struct cfg80211_registered_device *dev,
 987                                bool large)
 988 {
 989         struct nlattr *nl_wowlan;
 990
 991         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 992                 return 0;
 993
 994         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 995         if (!nl_wowlan)
 996                 return -ENOBUFS;
 997
 998         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 999              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1000             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1001              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1002             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1003              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1004             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1005              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1006             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1007              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1008             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1009              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1010             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1011              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1012             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1013              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1014                 return -ENOBUFS;
1015
1016         if (dev->wiphy.wowlan.n_patterns) {
1017                 struct nl80211_wowlan_pattern_support pat = {
1018                         .max_patterns = dev->wiphy.wowlan.n_patterns,
1019                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
1020                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
1021                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
1022                 };
1023
1024                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1025                             sizeof(pat), &pat))
1026                         return -ENOBUFS;
1027         }
1028
1029         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1030                 return -ENOBUFS;
1031
1032         nla_nest_end(msg, nl_wowlan);
1033
1034         return 0;
1035 }
1036 #endif
1037
1038 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1039                                       struct ieee80211_supported_band *sband)
1040 {
1041         struct nlattr *nl_rates, *nl_rate;
1042         struct ieee80211_rate *rate;
1043         int i;
1044
1045         /* add HT info */
1046         if (sband->ht_cap.ht_supported &&
1047             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1048                      sizeof(sband->ht_cap.mcs),
1049                      &sband->ht_cap.mcs) ||
1050              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1051                          sband->ht_cap.cap) ||
1052              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1053                         sband->ht_cap.ampdu_factor) ||
1054              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1055                         sband->ht_cap.ampdu_density)))
1056                 return -ENOBUFS;
1057
1058         /* add VHT info */
1059         if (sband->vht_cap.vht_supported &&
1060             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1061                      sizeof(sband->vht_cap.vht_mcs),
1062                      &sband->vht_cap.vht_mcs) ||
1063              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1064                          sband->vht_cap.cap)))
1065                 return -ENOBUFS;
1066
1067         /* add bitrates */
1068         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1069         if (!nl_rates)
1070                 return -ENOBUFS;
1071
1072         for (i = 0; i < sband->n_bitrates; i++) {
1073                 nl_rate = nla_nest_start(msg, i);
1074                 if (!nl_rate)
1075                         return -ENOBUFS;
1076
1077                 rate = &sband->bitrates[i];
1078                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1079                                 rate->bitrate))
1080                         return -ENOBUFS;
1081                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1082                     nla_put_flag(msg,
1083                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1084                         return -ENOBUFS;
1085
1086                 nla_nest_end(msg, nl_rate);
1087         }
1088
1089         nla_nest_end(msg, nl_rates);
1090
1091         return 0;
1092 }
1093
1094 static int
1095 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1096                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1097 {
1098         u16 stypes;
1099         struct nlattr *nl_ftypes, *nl_ifs;
1100         enum nl80211_iftype ift;
1101         int i;
1102
1103         if (!mgmt_stypes)
1104                 return 0;
1105
1106         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1107         if (!nl_ifs)
1108                 return -ENOBUFS;
1109
1110         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1111                 nl_ftypes = nla_nest_start(msg, ift);
1112                 if (!nl_ftypes)
1113                         return -ENOBUFS;
1114                 i = 0;
1115                 stypes = mgmt_stypes[ift].tx;
1116                 while (stypes) {
1117                         if ((stypes & 1) &&
1118                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1119                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1120                                 return -ENOBUFS;
1121                         stypes >>= 1;
1122                         i++;
1123                 }
1124                 nla_nest_end(msg, nl_ftypes);
1125         }
1126
1127         nla_nest_end(msg, nl_ifs);
1128
1129         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1130         if (!nl_ifs)
1131                 return -ENOBUFS;
1132
1133         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1134                 nl_ftypes = nla_nest_start(msg, ift);
1135                 if (!nl_ftypes)
1136                         return -ENOBUFS;
1137                 i = 0;
1138                 stypes = mgmt_stypes[ift].rx;
1139                 while (stypes) {
1140                         if ((stypes & 1) &&
1141                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1142                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1143                                 return -ENOBUFS;
1144                         stypes >>= 1;
1145                         i++;
1146                 }
1147                 nla_nest_end(msg, nl_ftypes);
1148         }
1149         nla_nest_end(msg, nl_ifs);
1150
1151         return 0;
1152 }
1153
1154 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1155                               struct sk_buff *msg, u32 portid, u32 seq,
1156                               int flags, bool split, long *split_start,
1157                               long *band_start, long *chan_start)
1158 {
1159         void *hdr;
1160         struct nlattr *nl_bands, *nl_band;
1161         struct nlattr *nl_freqs, *nl_freq;
1162         struct nlattr *nl_cmds;
1163         enum ieee80211_band band;
1164         struct ieee80211_channel *chan;
1165         int i;
1166         const struct ieee80211_txrx_stypes *mgmt_stypes =
1167                                 dev->wiphy.mgmt_stypes;
1168         long start = 0, start_chan = 0, start_band = 0;
1169         u32 features;
1170
1171         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1172         if (!hdr)
1173                 return -ENOBUFS;
1174
1175         /* allow always using the variables */
1176         if (!split) {
1177                 split_start = &start;
1178                 band_start = &start_band;
1179                 chan_start = &start_chan;
1180         }
1181
1182         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1183             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1184                            wiphy_name(&dev->wiphy)) ||
1185             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1186                         cfg80211_rdev_list_generation))
1187                 goto nla_put_failure;
1188
1189         switch (*split_start) {
1190         case 0:
1191                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1192                                dev->wiphy.retry_short) ||
1193                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1194                                dev->wiphy.retry_long) ||
1195                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1196                                 dev->wiphy.frag_threshold) ||
1197                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1198                                 dev->wiphy.rts_threshold) ||
1199                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1200                                dev->wiphy.coverage_class) ||
1201                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1202                                dev->wiphy.max_scan_ssids) ||
1203                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1204                                dev->wiphy.max_sched_scan_ssids) ||
1205                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1206                                 dev->wiphy.max_scan_ie_len) ||
1207                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1208                                 dev->wiphy.max_sched_scan_ie_len) ||
1209                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1210                                dev->wiphy.max_match_sets))
1211                         goto nla_put_failure;
1212
1213                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1214                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1215                         goto nla_put_failure;
1216                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1217                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1218                         goto nla_put_failure;
1219                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1220                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1221                         goto nla_put_failure;
1222                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1223                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1224                         goto nla_put_failure;
1225                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1226                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1227                         goto nla_put_failure;
1228                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1229                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1230                         goto nla_put_failure;
1231
1232                 (*split_start)++;
1233                 if (split)
1234                         break;
1235         case 1:
1236                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1237                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1238                             dev->wiphy.cipher_suites))
1239                         goto nla_put_failure;
1240
1241                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1242                                dev->wiphy.max_num_pmkids))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1246                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1247                         goto nla_put_failure;
1248
1249                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1250                                 dev->wiphy.available_antennas_tx) ||
1251                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1252                                 dev->wiphy.available_antennas_rx))
1253                         goto nla_put_failure;
1254
1255                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1256                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1257                                 dev->wiphy.probe_resp_offload))
1258                         goto nla_put_failure;
1259
1260                 if ((dev->wiphy.available_antennas_tx ||
1261                      dev->wiphy.available_antennas_rx) &&
1262                     dev->ops->get_antenna) {
1263                         u32 tx_ant = 0, rx_ant = 0;
1264                         int res;
1265                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1266                         if (!res) {
1267                                 if (nla_put_u32(msg,
1268                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1269                                                 tx_ant) ||
1270                                     nla_put_u32(msg,
1271                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1272                                                 rx_ant))
1273                                         goto nla_put_failure;
1274                         }
1275                 }
1276
1277                 (*split_start)++;
1278                 if (split)
1279                         break;
1280         case 2:
1281                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1282                                         dev->wiphy.interface_modes))
1283                                 goto nla_put_failure;
1284                 (*split_start)++;
1285                 if (split)
1286                         break;
1287         case 3:
1288                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1289                 if (!nl_bands)
1290                         goto nla_put_failure;
1291
1292                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1293                         struct ieee80211_supported_band *sband;
1294
1295                         sband = dev->wiphy.bands[band];
1296
1297                         if (!sband)
1298                                 continue;
1299
1300                         nl_band = nla_nest_start(msg, band);
1301                         if (!nl_band)
1302                                 goto nla_put_failure;
1303
1304                         switch (*chan_start) {
1305                         case 0:
1306                                 if (nl80211_send_band_rateinfo(msg, sband))
1307                                         goto nla_put_failure;
1308                                 (*chan_start)++;
1309                                 if (split)
1310                                         break;
1311                         default:
1312                                 /* add frequencies */
1313                                 nl_freqs = nla_nest_start(
1314                                         msg, NL80211_BAND_ATTR_FREQS);
1315                                 if (!nl_freqs)
1316                                         goto nla_put_failure;
1317
1318                                 for (i = *chan_start - 1;
1319                                      i < sband->n_channels;
1320                                      i++) {
1321                                         nl_freq = nla_nest_start(msg, i);
1322                                         if (!nl_freq)
1323                                                 goto nla_put_failure;
1324
1325                                         chan = &sband->channels[i];
1326
1327                                         if (nl80211_msg_put_channel(msg, chan,
1328                                                                     split))
1329                                                 goto nla_put_failure;
1330
1331                                         nla_nest_end(msg, nl_freq);
1332                                         if (split)
1333                                                 break;
1334                                 }
1335                                 if (i < sband->n_channels)
1336                                         *chan_start = i + 2;
1337                                 else
1338                                         *chan_start = 0;
1339                                 nla_nest_end(msg, nl_freqs);
1340                         }
1341
1342                         nla_nest_end(msg, nl_band);
1343
1344                         if (split) {
1345                                 /* start again here */
1346                                 if (*chan_start)
1347                                         band--;
1348                                 break;
1349                         }
1350                 }
1351                 nla_nest_end(msg, nl_bands);
1352
1353                 if (band < IEEE80211_NUM_BANDS)
1354                         *band_start = band + 1;
1355                 else
1356                         *band_start = 0;
1357
1358                 /* if bands & channels are done, continue outside */
1359                 if (*band_start == 0 && *chan_start == 0)
1360                         (*split_start)++;
1361                 if (split)
1362                         break;
1363         case 4:
1364                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1365                 if (!nl_cmds)
1366                         goto nla_put_failure;
1367
1368                 i = 0;
1369 #define CMD(op, n)                                                      \
1370                  do {                                                   \
1371                         if (dev->ops->op) {                             \
1372                                 i++;                                    \
1373                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1374                                         goto nla_put_failure;           \
1375                         }                                               \
1376                 } while (0)
1377
1378                 CMD(add_virtual_intf, NEW_INTERFACE);
1379                 CMD(change_virtual_intf, SET_INTERFACE);
1380                 CMD(add_key, NEW_KEY);
1381                 CMD(start_ap, START_AP);
1382                 CMD(add_station, NEW_STATION);
1383                 CMD(add_mpath, NEW_MPATH);
1384                 CMD(update_mesh_config, SET_MESH_CONFIG);
1385                 CMD(change_bss, SET_BSS);
1386                 CMD(auth, AUTHENTICATE);
1387                 CMD(assoc, ASSOCIATE);
1388                 CMD(deauth, DEAUTHENTICATE);
1389                 CMD(disassoc, DISASSOCIATE);
1390                 CMD(join_ibss, JOIN_IBSS);
1391                 CMD(join_mesh, JOIN_MESH);
1392                 CMD(set_pmksa, SET_PMKSA);
1393                 CMD(del_pmksa, DEL_PMKSA);
1394                 CMD(flush_pmksa, FLUSH_PMKSA);
1395                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1396                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1397                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1398                 CMD(mgmt_tx, FRAME);
1399                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1400                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1401                         i++;
1402                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1403                                 goto nla_put_failure;
1404                 }
1405                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1406                     dev->ops->join_mesh) {
1407                         i++;
1408                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1409                                 goto nla_put_failure;
1410                 }
1411                 CMD(set_wds_peer, SET_WDS_PEER);
1412                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1413                         CMD(tdls_mgmt, TDLS_MGMT);
1414                         CMD(tdls_oper, TDLS_OPER);
1415                 }
1416                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1417                         CMD(sched_scan_start, START_SCHED_SCAN);
1418                 CMD(probe_client, PROBE_CLIENT);
1419                 CMD(set_noack_map, SET_NOACK_MAP);
1420                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1421                         i++;
1422                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1423                                 goto nla_put_failure;
1424                 }
1425                 CMD(start_p2p_device, START_P2P_DEVICE);
1426                 CMD(set_mcast_rate, SET_MCAST_RATE);
1427                 if (split) {
1428                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1429                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1430                 }
1431
1432 #ifdef CONFIG_NL80211_TESTMODE
1433                 CMD(testmode_cmd, TESTMODE);
1434 #endif
1435
1436 #undef CMD
1437
1438                 if (dev->ops->connect || dev->ops->auth) {
1439                         i++;
1440                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1441                                 goto nla_put_failure;
1442                 }
1443
1444                 if (dev->ops->disconnect || dev->ops->deauth) {
1445                         i++;
1446                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1447                                 goto nla_put_failure;
1448                 }
1449
1450                 nla_nest_end(msg, nl_cmds);
1451                 (*split_start)++;
1452                 if (split)
1453                         break;
1454         case 5:
1455                 if (dev->ops->remain_on_channel &&
1456                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1457                     nla_put_u32(msg,
1458                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1459                                 dev->wiphy.max_remain_on_channel_duration))
1460                         goto nla_put_failure;
1461
1462                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1463                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1464                         goto nla_put_failure;
1465
1466                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1467                         goto nla_put_failure;
1468                 (*split_start)++;
1469                 if (split)
1470                         break;
1471         case 6:
1472 #ifdef CONFIG_PM
1473                 if (nl80211_send_wowlan(msg, dev, split))
1474                         goto nla_put_failure;
1475                 (*split_start)++;
1476                 if (split)
1477                         break;
1478 #else
1479                 (*split_start)++;
1480 #endif
1481         case 7:
1482                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1483                                         dev->wiphy.software_iftypes))
1484                         goto nla_put_failure;
1485
1486                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1487                         goto nla_put_failure;
1488
1489                 (*split_start)++;
1490                 if (split)
1491                         break;
1492         case 8:
1493                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1494                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1495                                 dev->wiphy.ap_sme_capa))
1496                         goto nla_put_failure;
1497
1498                 features = dev->wiphy.features;
1499                 /*
1500                  * We can only add the per-channel limit information if the
1501                  * dump is split, otherwise it makes it too big. Therefore
1502                  * only advertise it in that case.
1503                  */
1504                 if (split)
1505                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1506                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1507                         goto nla_put_failure;
1508
1509                 if (dev->wiphy.ht_capa_mod_mask &&
1510                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1511                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1512                             dev->wiphy.ht_capa_mod_mask))
1513                         goto nla_put_failure;
1514
1515                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1516                     dev->wiphy.max_acl_mac_addrs &&
1517                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1518                                 dev->wiphy.max_acl_mac_addrs))
1519                         goto nla_put_failure;
1520
1521                 /*
1522                  * Any information below this point is only available to
1523                  * applications that can deal with it being split. This
1524                  * helps ensure that newly added capabilities don't break
1525                  * older tools by overrunning their buffers.
1526                  *
1527                  * We still increment split_start so that in the split
1528                  * case we'll continue with more data in the next round,
1529                  * but break unconditionally so unsplit data stops here.
1530                  */
1531                 (*split_start)++;
1532                 break;
1533         case 9:
1534                 if (dev->wiphy.extended_capabilities &&
1535                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1536                              dev->wiphy.extended_capabilities_len,
1537                              dev->wiphy.extended_capabilities) ||
1538                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1539                              dev->wiphy.extended_capabilities_len,
1540                              dev->wiphy.extended_capabilities_mask)))
1541                         goto nla_put_failure;
1542
1543                 if (dev->wiphy.vht_capa_mod_mask &&
1544                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1545                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1546                             dev->wiphy.vht_capa_mod_mask))
1547                         goto nla_put_failure;
1548
1549                 /* done */
1550                 *split_start = 0;
1551                 break;
1552         }
1553         return genlmsg_end(msg, hdr);
1554
1555  nla_put_failure:
1556         genlmsg_cancel(msg, hdr);
1557         return -EMSGSIZE;
1558 }
1559
1560 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1561 {
1562         int idx = 0, ret;
1563         int start = cb->args[0];
1564         struct cfg80211_registered_device *dev;
1565         s64 filter_wiphy = -1;
1566         bool split = false;
1567         struct nlattr **tb = nl80211_fam.attrbuf;
1568         int res;
1569
1570         mutex_lock(&cfg80211_mutex);
1571         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1572                           tb, nl80211_fam.maxattr, nl80211_policy);
1573         if (res == 0) {
1574                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1575                 if (tb[NL80211_ATTR_WIPHY])
1576                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1577                 if (tb[NL80211_ATTR_WDEV])
1578                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1579                 if (tb[NL80211_ATTR_IFINDEX]) {
1580                         struct net_device *netdev;
1581                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1582
1583                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1584                         if (!netdev) {
1585                                 mutex_unlock(&cfg80211_mutex);
1586                                 return -ENODEV;
1587                         }
1588                         if (netdev->ieee80211_ptr) {
1589                                 dev = wiphy_to_dev(
1590                                         netdev->ieee80211_ptr->wiphy);
1591                                 filter_wiphy = dev->wiphy_idx;
1592                         }
1593                         dev_put(netdev);
1594                 }
1595         }
1596
1597         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1598                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1599                         continue;
1600                 if (++idx <= start)
1601                         continue;
1602                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1603                         continue;
1604                 /* attempt to fit multiple wiphy data chunks into the skb */
1605                 do {
1606                         ret = nl80211_send_wiphy(dev, skb,
1607                                                  NETLINK_CB(cb->skb).portid,
1608                                                  cb->nlh->nlmsg_seq,
1609                                                  NLM_F_MULTI,
1610                                                  split, &cb->args[1],
1611                                                  &cb->args[2],
1612                                                  &cb->args[3]);
1613                         if (ret < 0) {
1614                                 /*
1615                                  * If sending the wiphy data didn't fit (ENOBUFS
1616                                  * or EMSGSIZE returned), this SKB is still
1617                                  * empty (so it's not too big because another
1618                                  * wiphy dataset is already in the skb) and
1619                                  * we've not tried to adjust the dump allocation
1620                                  * yet ... then adjust the alloc size to be
1621                                  * bigger, and return 1 but with the empty skb.
1622                                  * This results in an empty message being RX'ed
1623                                  * in userspace, but that is ignored.
1624                                  *
1625                                  * We can then retry with the larger buffer.
1626                                  */
1627                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1628                                     !skb->len &&
1629                                     cb->min_dump_alloc < 4096) {
1630                                         cb->min_dump_alloc = 4096;
1631                                         mutex_unlock(&cfg80211_mutex);
1632                                         return 1;
1633                                 }
1634                                 idx--;
1635                                 break;
1636                         }
1637                 } while (cb->args[1] > 0);
1638                 break;
1639         }
1640         mutex_unlock(&cfg80211_mutex);
1641
1642         cb->args[0] = idx;
1643
1644         return skb->len;
1645 }
1646
1647 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1648 {
1649         struct sk_buff *msg;
1650         struct cfg80211_registered_device *dev = info->user_ptr[0];
1651
1652         msg = nlmsg_new(4096, GFP_KERNEL);
1653         if (!msg)
1654                 return -ENOMEM;
1655
1656         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1657                                false, NULL, NULL, NULL) < 0) {
1658                 nlmsg_free(msg);
1659                 return -ENOBUFS;
1660         }
1661
1662         return genlmsg_reply(msg, info);
1663 }
1664
1665 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1666         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1667         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1668         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1669         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1670         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1671 };
1672
1673 static int parse_txq_params(struct nlattr *tb[],
1674                             struct ieee80211_txq_params *txq_params)
1675 {
1676         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1677             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1678             !tb[NL80211_TXQ_ATTR_AIFS])
1679                 return -EINVAL;
1680
1681         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1682         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1683         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1684         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1685         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1686
1687         if (txq_params->ac >= NL80211_NUM_ACS)
1688                 return -EINVAL;
1689
1690         return 0;
1691 }
1692
1693 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1694 {
1695         /*
1696          * You can only set the channel explicitly for WDS interfaces,
1697          * all others have their channel managed via their respective
1698          * "establish a connection" command (connect, join, ...)
1699          *
1700          * For AP/GO and mesh mode, the channel can be set with the
1701          * channel userspace API, but is only stored and passed to the
1702          * low-level driver when the AP starts or the mesh is joined.
1703          * This is for backward compatibility, userspace can also give
1704          * the channel in the start-ap or join-mesh commands instead.
1705          *
1706          * Monitors are special as they are normally slaved to
1707          * whatever else is going on, so they have their own special
1708          * operation to set the monitor channel if possible.
1709          */
1710         return !wdev ||
1711                 wdev->iftype == NL80211_IFTYPE_AP ||
1712                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1713                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1714                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1715 }
1716
1717 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1718                                  struct genl_info *info,
1719                                  struct cfg80211_chan_def *chandef)
1720 {
1721         u32 control_freq;
1722
1723         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1724                 return -EINVAL;
1725
1726         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1727
1728         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1729         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1730         chandef->center_freq1 = control_freq;
1731         chandef->center_freq2 = 0;
1732
1733         /* Primary channel not allowed */
1734         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1735                 return -EINVAL;
1736
1737         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1738                 enum nl80211_channel_type chantype;
1739
1740                 chantype = nla_get_u32(
1741                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1742
1743                 switch (chantype) {
1744                 case NL80211_CHAN_NO_HT:
1745                 case NL80211_CHAN_HT20:
1746                 case NL80211_CHAN_HT40PLUS:
1747                 case NL80211_CHAN_HT40MINUS:
1748                         cfg80211_chandef_create(chandef, chandef->chan,
1749                                                 chantype);
1750                         break;
1751                 default:
1752                         return -EINVAL;
1753                 }
1754         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1755                 chandef->width =
1756                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1757                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1758                         chandef->center_freq1 =
1759                                 nla_get_u32(
1760                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1761                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1762                         chandef->center_freq2 =
1763                                 nla_get_u32(
1764                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1765         }
1766
1767         if (!cfg80211_chandef_valid(chandef))
1768                 return -EINVAL;
1769
1770         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1771                                      IEEE80211_CHAN_DISABLED))
1772                 return -EINVAL;
1773
1774         return 0;
1775 }
1776
1777 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1778                                  struct wireless_dev *wdev,
1779                                  struct genl_info *info)
1780 {
1781         struct cfg80211_chan_def chandef;
1782         int result;
1783         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1784
1785         if (wdev)
1786                 iftype = wdev->iftype;
1787
1788         if (!nl80211_can_set_dev_channel(wdev))
1789                 return -EOPNOTSUPP;
1790
1791         result = nl80211_parse_chandef(rdev, info, &chandef);
1792         if (result)
1793                 return result;
1794
1795         mutex_lock(&rdev->devlist_mtx);
1796         switch (iftype) {
1797         case NL80211_IFTYPE_AP:
1798         case NL80211_IFTYPE_P2P_GO:
1799                 if (wdev->beacon_interval) {
1800                         result = -EBUSY;
1801                         break;
1802                 }
1803                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1804                         result = -EINVAL;
1805                         break;
1806                 }
1807                 wdev->preset_chandef = chandef;
1808                 result = 0;
1809                 break;
1810         case NL80211_IFTYPE_MESH_POINT:
1811                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1812                 break;
1813         case NL80211_IFTYPE_MONITOR:
1814                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1815                 break;
1816         default:
1817                 result = -EINVAL;
1818         }
1819         mutex_unlock(&rdev->devlist_mtx);
1820
1821         return result;
1822 }
1823
1824 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1825 {
1826         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1827         struct net_device *netdev = info->user_ptr[1];
1828
1829         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1830 }
1831
1832 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1833 {
1834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1835         struct net_device *dev = info->user_ptr[1];
1836         struct wireless_dev *wdev = dev->ieee80211_ptr;
1837         const u8 *bssid;
1838
1839         if (!info->attrs[NL80211_ATTR_MAC])
1840                 return -EINVAL;
1841
1842         if (netif_running(dev))
1843                 return -EBUSY;
1844
1845         if (!rdev->ops->set_wds_peer)
1846                 return -EOPNOTSUPP;
1847
1848         if (wdev->iftype != NL80211_IFTYPE_WDS)
1849                 return -EOPNOTSUPP;
1850
1851         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1852         return rdev_set_wds_peer(rdev, dev, bssid);
1853 }
1854
1855
1856 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1857 {
1858         struct cfg80211_registered_device *rdev;
1859         struct net_device *netdev = NULL;
1860         struct wireless_dev *wdev;
1861         int result = 0, rem_txq_params = 0;
1862         struct nlattr *nl_txq_params;
1863         u32 changed;
1864         u8 retry_short = 0, retry_long = 0;
1865         u32 frag_threshold = 0, rts_threshold = 0;
1866         u8 coverage_class = 0;
1867
1868         /*
1869          * Try to find the wiphy and netdev. Normally this
1870          * function shouldn't need the netdev, but this is
1871          * done for backward compatibility -- previously
1872          * setting the channel was done per wiphy, but now
1873          * it is per netdev. Previous userland like hostapd
1874          * also passed a netdev to set_wiphy, so that it is
1875          * possible to let that go to the right netdev!
1876          */
1877         mutex_lock(&cfg80211_mutex);
1878
1879         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1880                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1881
1882                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1883                 if (netdev && netdev->ieee80211_ptr) {
1884                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1885                         mutex_lock(&rdev->mtx);
1886                 } else
1887                         netdev = NULL;
1888         }
1889
1890         if (!netdev) {
1891                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1892                                                   info->attrs);
1893                 if (IS_ERR(rdev)) {
1894                         mutex_unlock(&cfg80211_mutex);
1895                         return PTR_ERR(rdev);
1896                 }
1897                 wdev = NULL;
1898                 netdev = NULL;
1899                 result = 0;
1900
1901                 mutex_lock(&rdev->mtx);
1902         } else
1903                 wdev = netdev->ieee80211_ptr;
1904
1905         /*
1906          * end workaround code, by now the rdev is available
1907          * and locked, and wdev may or may not be NULL.
1908          */
1909
1910         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1911                 result = cfg80211_dev_rename(
1912                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1913
1914         mutex_unlock(&cfg80211_mutex);
1915
1916         if (result)
1917                 goto bad_res;
1918
1919         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1920                 struct ieee80211_txq_params txq_params;
1921                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1922
1923                 if (!rdev->ops->set_txq_params) {
1924                         result = -EOPNOTSUPP;
1925                         goto bad_res;
1926                 }
1927
1928                 if (!netdev) {
1929                         result = -EINVAL;
1930                         goto bad_res;
1931                 }
1932
1933                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1934                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1935                         result = -EINVAL;
1936                         goto bad_res;
1937                 }
1938
1939                 if (!netif_running(netdev)) {
1940                         result = -ENETDOWN;
1941                         goto bad_res;
1942                 }
1943
1944                 nla_for_each_nested(nl_txq_params,
1945                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1946                                     rem_txq_params) {
1947                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1948                                   nla_data(nl_txq_params),
1949                                   nla_len(nl_txq_params),
1950                                   txq_params_policy);
1951                         result = parse_txq_params(tb, &txq_params);
1952                         if (result)
1953                                 goto bad_res;
1954
1955                         result = rdev_set_txq_params(rdev, netdev,
1956                                                      &txq_params);
1957                         if (result)
1958                                 goto bad_res;
1959                 }
1960         }
1961
1962         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1963                 result = __nl80211_set_channel(rdev,
1964                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1965                                 info);
1966                 if (result)
1967                         goto bad_res;
1968         }
1969
1970         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1971                 struct wireless_dev *txp_wdev = wdev;
1972                 enum nl80211_tx_power_setting type;
1973                 int idx, mbm = 0;
1974
1975                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1976                         txp_wdev = NULL;
1977
1978                 if (!rdev->ops->set_tx_power) {
1979                         result = -EOPNOTSUPP;
1980                         goto bad_res;
1981                 }
1982
1983                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1984                 type = nla_get_u32(info->attrs[idx]);
1985
1986                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1987                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1988                         result = -EINVAL;
1989                         goto bad_res;
1990                 }
1991
1992                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1993                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1994                         mbm = nla_get_u32(info->attrs[idx]);
1995                 }
1996
1997                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1998                 if (result)
1999                         goto bad_res;
2000         }
2001
2002         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2003             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2004                 u32 tx_ant, rx_ant;
2005                 if ((!rdev->wiphy.available_antennas_tx &&
2006                      !rdev->wiphy.available_antennas_rx) ||
2007                     !rdev->ops->set_antenna) {
2008                         result = -EOPNOTSUPP;
2009                         goto bad_res;
2010                 }
2011
2012                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2013                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2014
2015                 /* reject antenna configurations which don't match the
2016                  * available antenna masks, except for the "all" mask */
2017                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2018                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2019                         result = -EINVAL;
2020                         goto bad_res;
2021                 }
2022
2023                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2024                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2025
2026                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2027                 if (result)
2028                         goto bad_res;
2029         }
2030
2031         changed = 0;
2032
2033         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2034                 retry_short = nla_get_u8(
2035                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2036                 if (retry_short == 0) {
2037                         result = -EINVAL;
2038                         goto bad_res;
2039                 }
2040                 changed |= WIPHY_PARAM_RETRY_SHORT;
2041         }
2042
2043         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2044                 retry_long = nla_get_u8(
2045                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2046                 if (retry_long == 0) {
2047                         result = -EINVAL;
2048                         goto bad_res;
2049                 }
2050                 changed |= WIPHY_PARAM_RETRY_LONG;
2051         }
2052
2053         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2054                 frag_threshold = nla_get_u32(
2055                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2056                 if (frag_threshold < 256) {
2057                         result = -EINVAL;
2058                         goto bad_res;
2059                 }
2060                 if (frag_threshold != (u32) -1) {
2061                         /*
2062                          * Fragments (apart from the last one) are required to
2063                          * have even length. Make the fragmentation code
2064                          * simpler by stripping LSB should someone try to use
2065                          * odd threshold value.
2066                          */
2067                         frag_threshold &= ~0x1;
2068                 }
2069                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2070         }
2071
2072         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2073                 rts_threshold = nla_get_u32(
2074                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2075                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2076         }
2077
2078         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2079                 coverage_class = nla_get_u8(
2080                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2081                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2082         }
2083
2084         if (changed) {
2085                 u8 old_retry_short, old_retry_long;
2086                 u32 old_frag_threshold, old_rts_threshold;
2087                 u8 old_coverage_class;
2088
2089                 if (!rdev->ops->set_wiphy_params) {
2090                         result = -EOPNOTSUPP;
2091                         goto bad_res;
2092                 }
2093
2094                 old_retry_short = rdev->wiphy.retry_short;
2095                 old_retry_long = rdev->wiphy.retry_long;
2096                 old_frag_threshold = rdev->wiphy.frag_threshold;
2097                 old_rts_threshold = rdev->wiphy.rts_threshold;
2098                 old_coverage_class = rdev->wiphy.coverage_class;
2099
2100                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2101                         rdev->wiphy.retry_short = retry_short;
2102                 if (changed & WIPHY_PARAM_RETRY_LONG)
2103                         rdev->wiphy.retry_long = retry_long;
2104                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2105                         rdev->wiphy.frag_threshold = frag_threshold;
2106                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2107                         rdev->wiphy.rts_threshold = rts_threshold;
2108                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2109                         rdev->wiphy.coverage_class = coverage_class;
2110
2111                 result = rdev_set_wiphy_params(rdev, changed);
2112                 if (result) {
2113                         rdev->wiphy.retry_short = old_retry_short;
2114                         rdev->wiphy.retry_long = old_retry_long;
2115                         rdev->wiphy.frag_threshold = old_frag_threshold;
2116                         rdev->wiphy.rts_threshold = old_rts_threshold;
2117                         rdev->wiphy.coverage_class = old_coverage_class;
2118                 }
2119         }
2120
2121  bad_res:
2122         mutex_unlock(&rdev->mtx);
2123         if (netdev)
2124                 dev_put(netdev);
2125         return result;
2126 }
2127
2128 static inline u64 wdev_id(struct wireless_dev *wdev)
2129 {
2130         return (u64)wdev->identifier |
2131                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2132 }
2133
2134 static int nl80211_send_chandef(struct sk_buff *msg,
2135                                  struct cfg80211_chan_def *chandef)
2136 {
2137         WARN_ON(!cfg80211_chandef_valid(chandef));
2138
2139         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2140                         chandef->chan->center_freq))
2141                 return -ENOBUFS;
2142         switch (chandef->width) {
2143         case NL80211_CHAN_WIDTH_20_NOHT:
2144         case NL80211_CHAN_WIDTH_20:
2145         case NL80211_CHAN_WIDTH_40:
2146                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2147                                 cfg80211_get_chandef_type(chandef)))
2148                         return -ENOBUFS;
2149                 break;
2150         default:
2151                 break;
2152         }
2153         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2154                 return -ENOBUFS;
2155         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2156                 return -ENOBUFS;
2157         if (chandef->center_freq2 &&
2158             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2159                 return -ENOBUFS;
2160         return 0;
2161 }
2162
2163 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2164                               struct cfg80211_registered_device *rdev,
2165                               struct wireless_dev *wdev)
2166 {
2167         struct net_device *dev = wdev->netdev;
2168         void *hdr;
2169
2170         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2171         if (!hdr)
2172                 return -1;
2173
2174         if (dev &&
2175             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2176              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2177                 goto nla_put_failure;
2178
2179         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2180             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2181             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2182             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2183             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2184                         rdev->devlist_generation ^
2185                         (cfg80211_rdev_list_generation << 2)))
2186                 goto nla_put_failure;
2187
2188         if (rdev->ops->get_channel) {
2189                 int ret;
2190                 struct cfg80211_chan_def chandef;
2191
2192                 ret = rdev_get_channel(rdev, wdev, &chandef);
2193                 if (ret == 0) {
2194                         if (nl80211_send_chandef(msg, &chandef))
2195                                 goto nla_put_failure;
2196                 }
2197         }
2198
2199         if (wdev->ssid_len) {
2200                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2201                         goto nla_put_failure;
2202         }
2203
2204         return genlmsg_end(msg, hdr);
2205
2206  nla_put_failure:
2207         genlmsg_cancel(msg, hdr);
2208         return -EMSGSIZE;
2209 }
2210
2211 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2212 {
2213         int wp_idx = 0;
2214         int if_idx = 0;
2215         int wp_start = cb->args[0];
2216         int if_start = cb->args[1];
2217         struct cfg80211_registered_device *rdev;
2218         struct wireless_dev *wdev;
2219
2220         mutex_lock(&cfg80211_mutex);
2221         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2222                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2223                         continue;
2224                 if (wp_idx < wp_start) {
2225                         wp_idx++;
2226                         continue;
2227                 }
2228                 if_idx = 0;
2229
2230                 mutex_lock(&rdev->devlist_mtx);
2231                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2232                         if (if_idx < if_start) {
2233                                 if_idx++;
2234                                 continue;
2235                         }
2236                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2237                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2238                                                rdev, wdev) < 0) {
2239                                 mutex_unlock(&rdev->devlist_mtx);
2240                                 goto out;
2241                         }
2242                         if_idx++;
2243                 }
2244                 mutex_unlock(&rdev->devlist_mtx);
2245
2246                 wp_idx++;
2247         }
2248  out:
2249         mutex_unlock(&cfg80211_mutex);
2250
2251         cb->args[0] = wp_idx;
2252         cb->args[1] = if_idx;
2253
2254         return skb->len;
2255 }
2256
2257 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2258 {
2259         struct sk_buff *msg;
2260         struct cfg80211_registered_device *dev = info->user_ptr[0];
2261         struct wireless_dev *wdev = info->user_ptr[1];
2262
2263         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2264         if (!msg)
2265                 return -ENOMEM;
2266
2267         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2268                                dev, wdev) < 0) {
2269                 nlmsg_free(msg);
2270                 return -ENOBUFS;
2271         }
2272
2273         return genlmsg_reply(msg, info);
2274 }
2275
2276 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2277         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2278         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2279         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2280         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2281         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2282 };
2283
2284 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2285 {
2286         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2287         int flag;
2288
2289         *mntrflags = 0;
2290
2291         if (!nla)
2292                 return -EINVAL;
2293
2294         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2295                              nla, mntr_flags_policy))
2296                 return -EINVAL;
2297
2298         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2299                 if (flags[flag])
2300                         *mntrflags |= (1<<flag);
2301
2302         return 0;
2303 }
2304
2305 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2306                                struct net_device *netdev, u8 use_4addr,
2307                                enum nl80211_iftype iftype)
2308 {
2309         if (!use_4addr) {
2310                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2311                         return -EBUSY;
2312                 return 0;
2313         }
2314
2315         switch (iftype) {
2316         case NL80211_IFTYPE_AP_VLAN:
2317                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2318                         return 0;
2319                 break;
2320         case NL80211_IFTYPE_STATION:
2321                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2322                         return 0;
2323                 break;
2324         default:
2325                 break;
2326         }
2327
2328         return -EOPNOTSUPP;
2329 }
2330
2331 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2332 {
2333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2334         struct vif_params params;
2335         int err;
2336         enum nl80211_iftype otype, ntype;
2337         struct net_device *dev = info->user_ptr[1];
2338         u32 _flags, *flags = NULL;
2339         bool change = false;
2340
2341         memset(&params, 0, sizeof(params));
2342
2343         otype = ntype = dev->ieee80211_ptr->iftype;
2344
2345         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2346                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2347                 if (otype != ntype)
2348                         change = true;
2349                 if (ntype > NL80211_IFTYPE_MAX)
2350                         return -EINVAL;
2351         }
2352
2353         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2354                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2355
2356                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2357                         return -EINVAL;
2358                 if (netif_running(dev))
2359                         return -EBUSY;
2360
2361                 wdev_lock(wdev);
2362                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2363                              IEEE80211_MAX_MESH_ID_LEN);
2364                 wdev->mesh_id_up_len =
2365                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2366                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2367                        wdev->mesh_id_up_len);
2368                 wdev_unlock(wdev);
2369         }
2370
2371         if (info->attrs[NL80211_ATTR_4ADDR]) {
2372                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2373                 change = true;
2374                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2375                 if (err)
2376                         return err;
2377         } else {
2378                 params.use_4addr = -1;
2379         }
2380
2381         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2382                 if (ntype != NL80211_IFTYPE_MONITOR)
2383                         return -EINVAL;
2384                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2385                                           &_flags);
2386                 if (err)
2387                         return err;
2388
2389                 flags = &_flags;
2390                 change = true;
2391         }
2392
2393         if (change)
2394                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2395         else
2396                 err = 0;
2397
2398         if (!err && params.use_4addr != -1)
2399                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2400
2401         return err;
2402 }
2403
2404 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2405 {
2406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2407         struct vif_params params;
2408         struct wireless_dev *wdev;
2409         struct sk_buff *msg;
2410         int err;
2411         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2412         u32 flags;
2413
2414         memset(&params, 0, sizeof(params));
2415
2416         if (!info->attrs[NL80211_ATTR_IFNAME])
2417                 return -EINVAL;
2418
2419         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2420                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2421                 if (type > NL80211_IFTYPE_MAX)
2422                         return -EINVAL;
2423         }
2424
2425         if (!rdev->ops->add_virtual_intf ||
2426             !(rdev->wiphy.interface_modes & (1 << type)))
2427                 return -EOPNOTSUPP;
2428
2429         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2430                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2431                            ETH_ALEN);
2432                 if (!is_valid_ether_addr(params.macaddr))
2433                         return -EADDRNOTAVAIL;
2434         }
2435
2436         if (info->attrs[NL80211_ATTR_4ADDR]) {
2437                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2438                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2439                 if (err)
2440                         return err;
2441         }
2442
2443         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2444         if (!msg)
2445                 return -ENOMEM;
2446
2447         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2448                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2449                                   &flags);
2450         wdev = rdev_add_virtual_intf(rdev,
2451                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2452                                 type, err ? NULL : &flags, &params);
2453         if (IS_ERR(wdev)) {
2454                 nlmsg_free(msg);
2455                 return PTR_ERR(wdev);
2456         }
2457
2458         switch (type) {
2459         case NL80211_IFTYPE_MESH_POINT:
2460                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2461                         break;
2462                 wdev_lock(wdev);
2463                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2464                              IEEE80211_MAX_MESH_ID_LEN);
2465                 wdev->mesh_id_up_len =
2466                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2467                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2468                        wdev->mesh_id_up_len);
2469                 wdev_unlock(wdev);
2470                 break;
2471         case NL80211_IFTYPE_P2P_DEVICE:
2472                 /*
2473                  * P2P Device doesn't have a netdev, so doesn't go
2474                  * through the netdev notifier and must be added here
2475                  */
2476                 mutex_init(&wdev->mtx);
2477                 INIT_LIST_HEAD(&wdev->event_list);
2478                 spin_lock_init(&wdev->event_lock);
2479                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2480                 spin_lock_init(&wdev->mgmt_registrations_lock);
2481
2482                 mutex_lock(&rdev->devlist_mtx);
2483                 wdev->identifier = ++rdev->wdev_id;
2484                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2485                 rdev->devlist_generation++;
2486                 mutex_unlock(&rdev->devlist_mtx);
2487                 break;
2488         default:
2489                 break;
2490         }
2491
2492         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2493                                rdev, wdev) < 0) {
2494                 nlmsg_free(msg);
2495                 return -ENOBUFS;
2496         }
2497
2498         return genlmsg_reply(msg, info);
2499 }
2500
2501 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2502 {
2503         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2504         struct wireless_dev *wdev = info->user_ptr[1];
2505
2506         if (!rdev->ops->del_virtual_intf)
2507                 return -EOPNOTSUPP;
2508
2509         /*
2510          * If we remove a wireless device without a netdev then clear
2511          * user_ptr[1] so that nl80211_post_doit won't dereference it
2512          * to check if it needs to do dev_put(). Otherwise it crashes
2513          * since the wdev has been freed, unlike with a netdev where
2514          * we need the dev_put() for the netdev to really be freed.
2515          */
2516         if (!wdev->netdev)
2517                 info->user_ptr[1] = NULL;
2518
2519         return rdev_del_virtual_intf(rdev, wdev);
2520 }
2521
2522 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2523 {
2524         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2525         struct net_device *dev = info->user_ptr[1];
2526         u16 noack_map;
2527
2528         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2529                 return -EINVAL;
2530
2531         if (!rdev->ops->set_noack_map)
2532                 return -EOPNOTSUPP;
2533
2534         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2535
2536         return rdev_set_noack_map(rdev, dev, noack_map);
2537 }
2538
2539 struct get_key_cookie {
2540         struct sk_buff *msg;
2541         int error;
2542         int idx;
2543 };
2544
2545 static void get_key_callback(void *c, struct key_params *params)
2546 {
2547         struct nlattr *key;
2548         struct get_key_cookie *cookie = c;
2549
2550         if ((params->key &&
2551              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2552                      params->key_len, params->key)) ||
2553             (params->seq &&
2554              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2555                      params->seq_len, params->seq)) ||
2556             (params->cipher &&
2557              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2558                          params->cipher)))
2559                 goto nla_put_failure;
2560
2561         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2562         if (!key)
2563                 goto nla_put_failure;
2564
2565         if ((params->key &&
2566              nla_put(cookie->msg, NL80211_KEY_DATA,
2567                      params->key_len, params->key)) ||
2568             (params->seq &&
2569              nla_put(cookie->msg, NL80211_KEY_SEQ,
2570                      params->seq_len, params->seq)) ||
2571             (params->cipher &&
2572              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2573                          params->cipher)))
2574                 goto nla_put_failure;
2575
2576         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2577                 goto nla_put_failure;
2578
2579         nla_nest_end(cookie->msg, key);
2580
2581         return;
2582  nla_put_failure:
2583         cookie->error = 1;
2584 }
2585
2586 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2587 {
2588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2589         int err;
2590         struct net_device *dev = info->user_ptr[1];
2591         u8 key_idx = 0;
2592         const u8 *mac_addr = NULL;
2593         bool pairwise;
2594         struct get_key_cookie cookie = {
2595                 .error = 0,
2596         };
2597         void *hdr;
2598         struct sk_buff *msg;
2599
2600         if (info->attrs[NL80211_ATTR_KEY_IDX])
2601                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2602
2603         if (key_idx > 5)
2604                 return -EINVAL;
2605
2606         if (info->attrs[NL80211_ATTR_MAC])
2607                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2608
2609         pairwise = !!mac_addr;
2610         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2611                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2612                 if (kt >= NUM_NL80211_KEYTYPES)
2613                         return -EINVAL;
2614                 if (kt != NL80211_KEYTYPE_GROUP &&
2615                     kt != NL80211_KEYTYPE_PAIRWISE)
2616                         return -EINVAL;
2617                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2618         }
2619
2620         if (!rdev->ops->get_key)
2621                 return -EOPNOTSUPP;
2622
2623         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2624         if (!msg)
2625                 return -ENOMEM;
2626
2627         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2628                              NL80211_CMD_NEW_KEY);
2629         if (IS_ERR(hdr))
2630                 return PTR_ERR(hdr);
2631
2632         cookie.msg = msg;
2633         cookie.idx = key_idx;
2634
2635         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2636             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2637                 goto nla_put_failure;
2638         if (mac_addr &&
2639             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2640                 goto nla_put_failure;
2641
2642         if (pairwise && mac_addr &&
2643             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2644                 return -ENOENT;
2645
2646         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2647                            get_key_callback);
2648
2649         if (err)
2650                 goto free_msg;
2651
2652         if (cookie.error)
2653                 goto nla_put_failure;
2654
2655         genlmsg_end(msg, hdr);
2656         return genlmsg_reply(msg, info);
2657
2658  nla_put_failure:
2659         err = -ENOBUFS;
2660  free_msg:
2661         nlmsg_free(msg);
2662         return err;
2663 }
2664
2665 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2666 {
2667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2668         struct key_parse key;
2669         int err;
2670         struct net_device *dev = info->user_ptr[1];
2671
2672         err = nl80211_parse_key(info, &key);
2673         if (err)
2674                 return err;
2675
2676         if (key.idx < 0)
2677                 return -EINVAL;
2678
2679         /* only support setting default key */
2680         if (!key.def && !key.defmgmt)
2681                 return -EINVAL;
2682
2683         wdev_lock(dev->ieee80211_ptr);
2684
2685         if (key.def) {
2686                 if (!rdev->ops->set_default_key) {
2687                         err = -EOPNOTSUPP;
2688                         goto out;
2689                 }
2690
2691                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2692                 if (err)
2693                         goto out;
2694
2695                 err = rdev_set_default_key(rdev, dev, key.idx,
2696                                                  key.def_uni, key.def_multi);
2697
2698                 if (err)
2699                         goto out;
2700
2701 #ifdef CONFIG_CFG80211_WEXT
2702                 dev->ieee80211_ptr->wext.default_key = key.idx;
2703 #endif
2704         } else {
2705                 if (key.def_uni || !key.def_multi) {
2706                         err = -EINVAL;
2707                         goto out;
2708                 }
2709
2710                 if (!rdev->ops->set_default_mgmt_key) {
2711                         err = -EOPNOTSUPP;
2712                         goto out;
2713                 }
2714
2715                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2716                 if (err)
2717                         goto out;
2718
2719                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2720                 if (err)
2721                         goto out;
2722
2723 #ifdef CONFIG_CFG80211_WEXT
2724                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2725 #endif
2726         }
2727
2728  out:
2729         wdev_unlock(dev->ieee80211_ptr);
2730
2731         return err;
2732 }
2733
2734 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2735 {
2736         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2737         int err;
2738         struct net_device *dev = info->user_ptr[1];
2739         struct key_parse key;
2740         const u8 *mac_addr = NULL;
2741
2742         err = nl80211_parse_key(info, &key);
2743         if (err)
2744                 return err;
2745
2746         if (!key.p.key)
2747                 return -EINVAL;
2748
2749         if (info->attrs[NL80211_ATTR_MAC])
2750                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2751
2752         if (key.type == -1) {
2753                 if (mac_addr)
2754                         key.type = NL80211_KEYTYPE_PAIRWISE;
2755                 else
2756                         key.type = NL80211_KEYTYPE_GROUP;
2757         }
2758
2759         /* for now */
2760         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2761             key.type != NL80211_KEYTYPE_GROUP)
2762                 return -EINVAL;
2763
2764         if (!rdev->ops->add_key)
2765                 return -EOPNOTSUPP;
2766
2767         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2768                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2769                                            mac_addr))
2770                 return -EINVAL;
2771
2772         wdev_lock(dev->ieee80211_ptr);
2773         err = nl80211_key_allowed(dev->ieee80211_ptr);
2774         if (!err)
2775                 err = rdev_add_key(rdev, dev, key.idx,
2776                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2777                                     mac_addr, &key.p);
2778         wdev_unlock(dev->ieee80211_ptr);
2779
2780         return err;
2781 }
2782
2783 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2784 {
2785         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2786         int err;
2787         struct net_device *dev = info->user_ptr[1];
2788         u8 *mac_addr = NULL;
2789         struct key_parse key;
2790
2791         err = nl80211_parse_key(info, &key);
2792         if (err)
2793                 return err;
2794
2795         if (info->attrs[NL80211_ATTR_MAC])
2796                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2797
2798         if (key.type == -1) {
2799                 if (mac_addr)
2800                         key.type = NL80211_KEYTYPE_PAIRWISE;
2801                 else
2802                         key.type = NL80211_KEYTYPE_GROUP;
2803         }
2804
2805         /* for now */
2806         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2807             key.type != NL80211_KEYTYPE_GROUP)
2808                 return -EINVAL;
2809
2810         if (!rdev->ops->del_key)
2811                 return -EOPNOTSUPP;
2812
2813         wdev_lock(dev->ieee80211_ptr);
2814         err = nl80211_key_allowed(dev->ieee80211_ptr);
2815
2816         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2817             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2818                 err = -ENOENT;
2819
2820         if (!err)
2821                 err = rdev_del_key(rdev, dev, key.idx,
2822                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2823                                    mac_addr);
2824
2825 #ifdef CONFIG_CFG80211_WEXT
2826         if (!err) {
2827                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2828                         dev->ieee80211_ptr->wext.default_key = -1;
2829                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2830                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2831         }
2832 #endif
2833         wdev_unlock(dev->ieee80211_ptr);
2834
2835         return err;
2836 }
2837
2838 /* This function returns an error or the number of nested attributes */
2839 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2840 {
2841         struct nlattr *attr;
2842         int n_entries = 0, tmp;
2843
2844         nla_for_each_nested(attr, nl_attr, tmp) {
2845                 if (nla_len(attr) != ETH_ALEN)
2846                         return -EINVAL;
2847
2848                 n_entries++;
2849         }
2850
2851         return n_entries;
2852 }
2853
2854 /*
2855  * This function parses ACL information and allocates memory for ACL data.
2856  * On successful return, the calling function is responsible to free the
2857  * ACL buffer returned by this function.
2858  */
2859 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2860                                                 struct genl_info *info)
2861 {
2862         enum nl80211_acl_policy acl_policy;
2863         struct nlattr *attr;
2864         struct cfg80211_acl_data *acl;
2865         int i = 0, n_entries, tmp;
2866
2867         if (!wiphy->max_acl_mac_addrs)
2868                 return ERR_PTR(-EOPNOTSUPP);
2869
2870         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2871                 return ERR_PTR(-EINVAL);
2872
2873         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2874         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2875             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2876                 return ERR_PTR(-EINVAL);
2877
2878         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2879                 return ERR_PTR(-EINVAL);
2880
2881         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2882         if (n_entries < 0)
2883                 return ERR_PTR(n_entries);
2884
2885         if (n_entries > wiphy->max_acl_mac_addrs)
2886                 return ERR_PTR(-ENOTSUPP);
2887
2888         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2889                       GFP_KERNEL);
2890         if (!acl)
2891                 return ERR_PTR(-ENOMEM);
2892
2893         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2894                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2895                 i++;
2896         }
2897
2898         acl->n_acl_entries = n_entries;
2899         acl->acl_policy = acl_policy;
2900
2901         return acl;
2902 }
2903
2904 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2905 {
2906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2907         struct net_device *dev = info->user_ptr[1];
2908         struct cfg80211_acl_data *acl;
2909         int err;
2910
2911         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2912             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2913                 return -EOPNOTSUPP;
2914
2915         if (!dev->ieee80211_ptr->beacon_interval)
2916                 return -EINVAL;
2917
2918         acl = parse_acl_data(&rdev->wiphy, info);
2919         if (IS_ERR(acl))
2920                 return PTR_ERR(acl);
2921
2922         err = rdev_set_mac_acl(rdev, dev, acl);
2923
2924         kfree(acl);
2925
2926         return err;
2927 }
2928
2929 static int nl80211_parse_beacon(struct genl_info *info,
2930                                 struct cfg80211_beacon_data *bcn)
2931 {
2932         bool haveinfo = false;
2933
2934         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2935             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2936             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2937             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2938                 return -EINVAL;
2939
2940         memset(bcn, 0, sizeof(*bcn));
2941
2942         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2943                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2944                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2945                 if (!bcn->head_len)
2946                         return -EINVAL;
2947                 haveinfo = true;
2948         }
2949
2950         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2951                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2952                 bcn->tail_len =
2953                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2954                 haveinfo = true;
2955         }
2956
2957         if (!haveinfo)
2958                 return -EINVAL;
2959
2960         if (info->attrs[NL80211_ATTR_IE]) {
2961                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2962                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2963         }
2964
2965         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2966                 bcn->proberesp_ies =
2967                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2968                 bcn->proberesp_ies_len =
2969                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2970         }
2971
2972         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2973                 bcn->assocresp_ies =
2974                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2975                 bcn->assocresp_ies_len =
2976                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2977         }
2978
2979         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2980                 bcn->probe_resp =
2981                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2982                 bcn->probe_resp_len =
2983                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2984         }
2985
2986         return 0;
2987 }
2988
2989 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2990                                    struct cfg80211_ap_settings *params)
2991 {
2992         struct wireless_dev *wdev;
2993         bool ret = false;
2994
2995         mutex_lock(&rdev->devlist_mtx);
2996
2997         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2998                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2999                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3000                         continue;
3001
3002                 if (!wdev->preset_chandef.chan)
3003                         continue;
3004
3005                 params->chandef = wdev->preset_chandef;
3006                 ret = true;
3007                 break;
3008         }
3009
3010         mutex_unlock(&rdev->devlist_mtx);
3011
3012         return ret;
3013 }
3014
3015 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3016                                     enum nl80211_auth_type auth_type,
3017                                     enum nl80211_commands cmd)
3018 {
3019         if (auth_type > NL80211_AUTHTYPE_MAX)
3020                 return false;
3021
3022         switch (cmd) {
3023         case NL80211_CMD_AUTHENTICATE:
3024                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3025                     auth_type == NL80211_AUTHTYPE_SAE)
3026                         return false;
3027                 return true;
3028         case NL80211_CMD_CONNECT:
3029         case NL80211_CMD_START_AP:
3030                 /* SAE not supported yet */
3031                 if (auth_type == NL80211_AUTHTYPE_SAE)
3032                         return false;
3033                 return true;
3034         default:
3035                 return false;
3036         }
3037 }
3038
3039 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3040 {
3041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3042         struct net_device *dev = info->user_ptr[1];
3043         struct wireless_dev *wdev = dev->ieee80211_ptr;
3044         struct cfg80211_ap_settings params;
3045         int err;
3046         u8 radar_detect_width = 0;
3047
3048         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3049             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3050                 return -EOPNOTSUPP;
3051
3052         if (!rdev->ops->start_ap)
3053                 return -EOPNOTSUPP;
3054
3055         if (wdev->beacon_interval)
3056                 return -EALREADY;
3057
3058         memset(&params, 0, sizeof(params));
3059
3060         /* these are required for START_AP */
3061         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3062             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3063             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3064                 return -EINVAL;
3065
3066         err = nl80211_parse_beacon(info, &params.beacon);
3067         if (err)
3068                 return err;
3069
3070         params.beacon_interval =
3071                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3072         params.dtim_period =
3073                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3074
3075         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3076         if (err)
3077                 return err;
3078
3079         /*
3080          * In theory, some of these attributes should be required here
3081          * but since they were not used when the command was originally
3082          * added, keep them optional for old user space programs to let
3083          * them continue to work with drivers that do not need the
3084          * additional information -- drivers must check!
3085          */
3086         if (info->attrs[NL80211_ATTR_SSID]) {
3087                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3088                 params.ssid_len =
3089                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3090                 if (params.ssid_len == 0 ||
3091                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3092                         return -EINVAL;
3093         }
3094
3095         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3096                 params.hidden_ssid = nla_get_u32(
3097                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3098                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3099                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3100                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3101                         return -EINVAL;
3102         }
3103
3104         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3105
3106         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3107                 params.auth_type = nla_get_u32(
3108                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3109                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3110                                              NL80211_CMD_START_AP))
3111                         return -EINVAL;
3112         } else
3113                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3114
3115         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3116                                       NL80211_MAX_NR_CIPHER_SUITES);
3117         if (err)
3118                 return err;
3119
3120         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3121                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3122                         return -EOPNOTSUPP;
3123                 params.inactivity_timeout = nla_get_u16(
3124                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3125         }
3126
3127         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3128                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3129                         return -EINVAL;
3130                 params.p2p_ctwindow =
3131                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3132                 if (params.p2p_ctwindow > 127)
3133                         return -EINVAL;
3134                 if (params.p2p_ctwindow != 0 &&
3135                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3136                         return -EINVAL;
3137         }
3138
3139         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3140                 u8 tmp;
3141
3142                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3143                         return -EINVAL;
3144                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3145                 if (tmp > 1)
3146                         return -EINVAL;
3147                 params.p2p_opp_ps = tmp;
3148                 if (params.p2p_opp_ps != 0 &&
3149                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3150                         return -EINVAL;
3151         }
3152
3153         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3154                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3155                 if (err)
3156                         return err;
3157         } else if (wdev->preset_chandef.chan) {
3158                 params.chandef = wdev->preset_chandef;
3159         } else if (!nl80211_get_ap_channel(rdev, &params))
3160                 return -EINVAL;
3161
3162         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3163                 return -EINVAL;
3164
3165         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3166         if (err < 0)
3167                 return err;
3168         if (err) {
3169                 radar_detect_width = BIT(params.chandef.width);
3170                 params.radar_required = true;
3171         }
3172
3173         mutex_lock(&rdev->devlist_mtx);
3174         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3175                                            params.chandef.chan,
3176                                            CHAN_MODE_SHARED,
3177                                            radar_detect_width);
3178         mutex_unlock(&rdev->devlist_mtx);
3179
3180         if (err)
3181                 return err;
3182
3183         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3184                 params.acl = parse_acl_data(&rdev->wiphy, info);
3185                 if (IS_ERR(params.acl))
3186                         return PTR_ERR(params.acl);
3187         }
3188
3189         err = rdev_start_ap(rdev, dev, &params);
3190         if (!err) {
3191                 wdev->preset_chandef = params.chandef;
3192                 wdev->beacon_interval = params.beacon_interval;
3193                 wdev->channel = params.chandef.chan;
3194                 wdev->ssid_len = params.ssid_len;
3195                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3196         }
3197
3198         kfree(params.acl);
3199
3200         return err;
3201 }
3202
3203 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3204 {
3205         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3206         struct net_device *dev = info->user_ptr[1];
3207         struct wireless_dev *wdev = dev->ieee80211_ptr;
3208         struct cfg80211_beacon_data params;
3209         int err;
3210
3211         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3212             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3213                 return -EOPNOTSUPP;
3214
3215         if (!rdev->ops->change_beacon)
3216                 return -EOPNOTSUPP;
3217
3218         if (!wdev->beacon_interval)
3219                 return -EINVAL;
3220
3221         err = nl80211_parse_beacon(info, &params);
3222         if (err)
3223                 return err;
3224
3225         return rdev_change_beacon(rdev, dev, &params);
3226 }
3227
3228 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3229 {
3230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3231         struct net_device *dev = info->user_ptr[1];
3232
3233         return cfg80211_stop_ap(rdev, dev);
3234 }
3235
3236 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3237         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3238         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3239         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3240         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3241         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3242         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3243 };
3244
3245 static int parse_station_flags(struct genl_info *info,
3246                                enum nl80211_iftype iftype,
3247                                struct station_parameters *params)
3248 {
3249         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3250         struct nlattr *nla;
3251         int flag;
3252
3253         /*
3254          * Try parsing the new attribute first so userspace
3255          * can specify both for older kernels.
3256          */
3257         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3258         if (nla) {
3259                 struct nl80211_sta_flag_update *sta_flags;
3260
3261                 sta_flags = nla_data(nla);
3262                 params->sta_flags_mask = sta_flags->mask;
3263                 params->sta_flags_set = sta_flags->set;
3264                 params->sta_flags_set &= params->sta_flags_mask;
3265                 if ((params->sta_flags_mask |
3266                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3267                         return -EINVAL;
3268                 return 0;
3269         }
3270
3271         /* if present, parse the old attribute */
3272
3273         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3274         if (!nla)
3275                 return 0;
3276
3277         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3278                              nla, sta_flags_policy))
3279                 return -EINVAL;
3280
3281         /*
3282          * Only allow certain flags for interface types so that
3283          * other attributes are silently ignored. Remember that
3284          * this is backward compatibility code with old userspace
3285          * and shouldn't be hit in other cases anyway.
3286          */
3287         switch (iftype) {
3288         case NL80211_IFTYPE_AP:
3289         case NL80211_IFTYPE_AP_VLAN:
3290         case NL80211_IFTYPE_P2P_GO:
3291                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3292                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3293                                          BIT(NL80211_STA_FLAG_WME) |
3294                                          BIT(NL80211_STA_FLAG_MFP);
3295                 break;
3296         case NL80211_IFTYPE_P2P_CLIENT:
3297         case NL80211_IFTYPE_STATION:
3298                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3299                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3300                 break;
3301         case NL80211_IFTYPE_MESH_POINT:
3302                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3303                                          BIT(NL80211_STA_FLAG_MFP) |
3304                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3305         default:
3306                 return -EINVAL;
3307         }
3308
3309         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3310                 if (flags[flag]) {
3311                         params->sta_flags_set |= (1<<flag);
3312
3313                         /* no longer support new API additions in old API */
3314                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3315                                 return -EINVAL;
3316                 }
3317         }
3318
3319         return 0;
3320 }
3321
3322 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3323                                  int attr)
3324 {
3325         struct nlattr *rate;
3326         u32 bitrate;
3327         u16 bitrate_compat;
3328
3329         rate = nla_nest_start(msg, attr);
3330         if (!rate)
3331                 return false;
3332
3333         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3334         bitrate = cfg80211_calculate_bitrate(info);
3335         /* report 16-bit bitrate only if we can */
3336         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3337         if (bitrate > 0 &&
3338             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3339                 return false;
3340         if (bitrate_compat > 0 &&
3341             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3342                 return false;
3343
3344         if (info->flags & RATE_INFO_FLAGS_MCS) {
3345                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
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_SHORT_GI &&
3351                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3352                         return false;
3353         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3354                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3355                         return false;
3356                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3357                         return false;
3358                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3359                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3360                         return false;
3361                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3362                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3363                         return false;
3364                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3365                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3366                         return false;
3367                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3368                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3369                         return false;
3370                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3371                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3372                         return false;
3373         }
3374
3375         nla_nest_end(msg, rate);
3376         return true;
3377 }
3378
3379 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3380                                 int flags,
3381                                 struct cfg80211_registered_device *rdev,
3382                                 struct net_device *dev,
3383                                 const u8 *mac_addr, struct station_info *sinfo)
3384 {
3385         void *hdr;
3386         struct nlattr *sinfoattr, *bss_param;
3387
3388         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3389         if (!hdr)
3390                 return -1;
3391
3392         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3393             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3394             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3395                 goto nla_put_failure;
3396
3397         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3398         if (!sinfoattr)
3399                 goto nla_put_failure;
3400         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3401             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3402                         sinfo->connected_time))
3403                 goto nla_put_failure;
3404         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3405             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3406                         sinfo->inactive_time))
3407                 goto nla_put_failure;
3408         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3409                               STATION_INFO_RX_BYTES64)) &&
3410             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3411                         (u32)sinfo->rx_bytes))
3412                 goto nla_put_failure;
3413         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3414                               NL80211_STA_INFO_TX_BYTES64)) &&
3415             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3416                         (u32)sinfo->tx_bytes))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3419             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3420                         sinfo->rx_bytes))
3421                 goto nla_put_failure;
3422         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3423             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3424                         sinfo->tx_bytes))
3425                 goto nla_put_failure;
3426         if ((sinfo->filled & STATION_INFO_LLID) &&
3427             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3428                 goto nla_put_failure;
3429         if ((sinfo->filled & STATION_INFO_PLID) &&
3430             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3431                 goto nla_put_failure;
3432         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3433             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3434                        sinfo->plink_state))
3435                 goto nla_put_failure;
3436         switch (rdev->wiphy.signal_type) {
3437         case CFG80211_SIGNAL_TYPE_MBM:
3438                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3439                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3440                                sinfo->signal))
3441                         goto nla_put_failure;
3442                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3443                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3444                                sinfo->signal_avg))
3445                         goto nla_put_failure;
3446                 break;
3447         default:
3448                 break;
3449         }
3450         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3451                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3452                                           NL80211_STA_INFO_TX_BITRATE))
3453                         goto nla_put_failure;
3454         }
3455         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3456                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3457                                           NL80211_STA_INFO_RX_BITRATE))
3458                         goto nla_put_failure;
3459         }
3460         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3461             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3462                         sinfo->rx_packets))
3463                 goto nla_put_failure;
3464         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3465             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3466                         sinfo->tx_packets))
3467                 goto nla_put_failure;
3468         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3469             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3470                         sinfo->tx_retries))
3471                 goto nla_put_failure;
3472         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3473             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3474                         sinfo->tx_failed))
3475                 goto nla_put_failure;
3476         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3477             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3478                         sinfo->beacon_loss_count))
3479                 goto nla_put_failure;
3480         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3481             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3482                         sinfo->local_pm))
3483                 goto nla_put_failure;
3484         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3485             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3486                         sinfo->peer_pm))
3487                 goto nla_put_failure;
3488         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3489             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3490                         sinfo->nonpeer_pm))
3491                 goto nla_put_failure;
3492         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3493                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3494                 if (!bss_param)
3495                         goto nla_put_failure;
3496
3497                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3498                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3499                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3500                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3501                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3502                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3503                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3504                                sinfo->bss_param.dtim_period) ||
3505                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3506                                 sinfo->bss_param.beacon_interval))
3507                         goto nla_put_failure;
3508
3509                 nla_nest_end(msg, bss_param);
3510         }
3511         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3512             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3513                     sizeof(struct nl80211_sta_flag_update),
3514                     &sinfo->sta_flags))
3515                 goto nla_put_failure;
3516         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3517                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3518                             sinfo->t_offset))
3519                 goto nla_put_failure;
3520         nla_nest_end(msg, sinfoattr);
3521
3522         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3523             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3524                     sinfo->assoc_req_ies))
3525                 goto nla_put_failure;
3526
3527         return genlmsg_end(msg, hdr);
3528
3529  nla_put_failure:
3530         genlmsg_cancel(msg, hdr);
3531         return -EMSGSIZE;
3532 }
3533
3534 static int nl80211_dump_station(struct sk_buff *skb,
3535                                 struct netlink_callback *cb)
3536 {
3537         struct station_info sinfo;
3538         struct cfg80211_registered_device *dev;
3539         struct wireless_dev *wdev;
3540         u8 mac_addr[ETH_ALEN];
3541         int sta_idx = cb->args[2];
3542         int err;
3543
3544         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3545         if (err)
3546                 return err;
3547
3548         if (!wdev->netdev) {
3549                 err = -EINVAL;
3550                 goto out_err;
3551         }
3552
3553         if (!dev->ops->dump_station) {
3554                 err = -EOPNOTSUPP;
3555                 goto out_err;
3556         }
3557
3558         while (1) {
3559                 memset(&sinfo, 0, sizeof(sinfo));
3560                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3561                                         mac_addr, &sinfo);
3562                 if (err == -ENOENT)
3563                         break;
3564                 if (err)
3565                         goto out_err;
3566
3567                 if (nl80211_send_station(skb,
3568                                 NETLINK_CB(cb->skb).portid,
3569                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3570                                 dev, wdev->netdev, mac_addr,
3571                                 &sinfo) < 0)
3572                         goto out;
3573
3574                 sta_idx++;
3575         }
3576
3577
3578  out:
3579         cb->args[2] = sta_idx;
3580         err = skb->len;
3581  out_err:
3582         nl80211_finish_wdev_dump(dev);
3583
3584         return err;
3585 }
3586
3587 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3588 {
3589         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3590         struct net_device *dev = info->user_ptr[1];
3591         struct station_info sinfo;
3592         struct sk_buff *msg;
3593         u8 *mac_addr = NULL;
3594         int err;
3595
3596         memset(&sinfo, 0, sizeof(sinfo));
3597
3598         if (!info->attrs[NL80211_ATTR_MAC])
3599                 return -EINVAL;
3600
3601         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3602
3603         if (!rdev->ops->get_station)
3604                 return -EOPNOTSUPP;
3605
3606         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3607         if (err)
3608                 return err;
3609
3610         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3611         if (!msg)
3612                 return -ENOMEM;
3613
3614         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3615                                  rdev, dev, mac_addr, &sinfo) < 0) {
3616                 nlmsg_free(msg);
3617                 return -ENOBUFS;
3618         }
3619
3620         return genlmsg_reply(msg, info);
3621 }
3622
3623 int cfg80211_check_station_change(struct wiphy *wiphy,
3624                                   struct station_parameters *params,
3625                                   enum cfg80211_station_type statype)
3626 {
3627         if (params->listen_interval != -1)
3628                 return -EINVAL;
3629         if (params->aid)
3630                 return -EINVAL;
3631
3632         /* When you run into this, adjust the code below for the new flag */
3633         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3634
3635         switch (statype) {
3636         case CFG80211_STA_MESH_PEER_KERNEL:
3637         case CFG80211_STA_MESH_PEER_USER:
3638                 /*
3639                  * No ignoring the TDLS flag here -- the userspace mesh
3640                  * code doesn't have the bug of including TDLS in the
3641                  * mask everywhere.
3642                  */
3643                 if (params->sta_flags_mask &
3644                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3645                                   BIT(NL80211_STA_FLAG_MFP) |
3646                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3647                         return -EINVAL;
3648                 break;
3649         case CFG80211_STA_TDLS_PEER_SETUP:
3650         case CFG80211_STA_TDLS_PEER_ACTIVE:
3651                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3652                         return -EINVAL;
3653                 /* ignore since it can't change */
3654                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3655                 break;
3656         default:
3657                 /* disallow mesh-specific things */
3658                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3659                         return -EINVAL;
3660                 if (params->local_pm)
3661                         return -EINVAL;
3662                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3663                         return -EINVAL;
3664         }
3665
3666         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3667             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3668                 /* TDLS can't be set, ... */
3669                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3670                         return -EINVAL;
3671                 /*
3672                  * ... but don't bother the driver with it. This works around
3673                  * a hostapd/wpa_supplicant issue -- it always includes the
3674                  * TLDS_PEER flag in the mask even for AP mode.
3675                  */
3676                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3677         }
3678
3679         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3680                 /* reject other things that can't change */
3681                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3682                         return -EINVAL;
3683                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3684                         return -EINVAL;
3685                 if (params->supported_rates)
3686                         return -EINVAL;
3687                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3688                         return -EINVAL;
3689         }
3690
3691         if (statype != CFG80211_STA_AP_CLIENT) {
3692                 if (params->vlan)
3693                         return -EINVAL;
3694         }
3695
3696         switch (statype) {
3697         case CFG80211_STA_AP_MLME_CLIENT:
3698                 /* Use this only for authorizing/unauthorizing a station */
3699                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3700                         return -EOPNOTSUPP;
3701                 break;
3702         case CFG80211_STA_AP_CLIENT:
3703                 /* accept only the listed bits */
3704                 if (params->sta_flags_mask &
3705                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3706                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3707                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3708                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3709                                   BIT(NL80211_STA_FLAG_WME) |
3710                                   BIT(NL80211_STA_FLAG_MFP)))
3711                         return -EINVAL;
3712
3713                 /* but authenticated/associated only if driver handles it */
3714                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3715                     params->sta_flags_mask &
3716                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3717                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3718                         return -EINVAL;
3719                 break;
3720         case CFG80211_STA_IBSS:
3721         case CFG80211_STA_AP_STA:
3722                 /* reject any changes other than AUTHORIZED */
3723                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3724                         return -EINVAL;
3725                 break;
3726         case CFG80211_STA_TDLS_PEER_SETUP:
3727                 /* reject any changes other than AUTHORIZED or WME */
3728                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3729                                                BIT(NL80211_STA_FLAG_WME)))
3730                         return -EINVAL;
3731                 /* force (at least) rates when authorizing */
3732                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3733                     !params->supported_rates)
3734                         return -EINVAL;
3735                 break;
3736         case CFG80211_STA_TDLS_PEER_ACTIVE:
3737                 /* reject any changes */
3738                 return -EINVAL;
3739         case CFG80211_STA_MESH_PEER_KERNEL:
3740                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3741                         return -EINVAL;
3742                 break;
3743         case CFG80211_STA_MESH_PEER_USER:
3744                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3745                         return -EINVAL;
3746                 break;
3747         }
3748
3749         return 0;
3750 }
3751 EXPORT_SYMBOL(cfg80211_check_station_change);
3752
3753 /*
3754  * Get vlan interface making sure it is running and on the right wiphy.
3755  */
3756 static struct net_device *get_vlan(struct genl_info *info,
3757                                    struct cfg80211_registered_device *rdev)
3758 {
3759         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3760         struct net_device *v;
3761         int ret;
3762
3763         if (!vlanattr)
3764                 return NULL;
3765
3766         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3767         if (!v)
3768                 return ERR_PTR(-ENODEV);
3769
3770         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3771                 ret = -EINVAL;
3772                 goto error;
3773         }
3774
3775         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3776             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3777             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3778                 ret = -EINVAL;
3779                 goto error;
3780         }
3781
3782         if (!netif_running(v)) {
3783                 ret = -ENETDOWN;
3784                 goto error;
3785         }
3786
3787         return v;
3788  error:
3789         dev_put(v);
3790         return ERR_PTR(ret);
3791 }
3792
3793 static struct nla_policy
3794 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3795         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3796         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3797 };
3798
3799 static int nl80211_parse_sta_wme(struct genl_info *info,
3800                                  struct station_parameters *params)
3801 {
3802         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3803         struct nlattr *nla;
3804         int err;
3805
3806         /* parse WME attributes if present */
3807         if (!info->attrs[NL80211_ATTR_STA_WME])
3808                 return 0;
3809
3810         nla = info->attrs[NL80211_ATTR_STA_WME];
3811         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3812                                nl80211_sta_wme_policy);
3813         if (err)
3814                 return err;
3815
3816         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3817                 params->uapsd_queues = nla_get_u8(
3818                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3819         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3820                 return -EINVAL;
3821
3822         if (tb[NL80211_STA_WME_MAX_SP])
3823                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3824
3825         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3826                 return -EINVAL;
3827
3828         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3829
3830         return 0;
3831 }
3832
3833 static int nl80211_set_station_tdls(struct genl_info *info,
3834                                     struct station_parameters *params)
3835 {
3836         /* Dummy STA entry gets updated once the peer capabilities are known */
3837         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3838                 params->ht_capa =
3839                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3840         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3841                 params->vht_capa =
3842                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3843
3844         return nl80211_parse_sta_wme(info, params);
3845 }
3846
3847 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3848 {
3849         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3850         struct net_device *dev = info->user_ptr[1];
3851         struct station_parameters params;
3852         u8 *mac_addr;
3853         int err;
3854
3855         memset(&params, 0, sizeof(params));
3856
3857         params.listen_interval = -1;
3858
3859         if (!rdev->ops->change_station)
3860                 return -EOPNOTSUPP;
3861
3862         if (info->attrs[NL80211_ATTR_STA_AID])
3863                 return -EINVAL;
3864
3865         if (!info->attrs[NL80211_ATTR_MAC])
3866                 return -EINVAL;
3867
3868         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3869
3870         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3871                 params.supported_rates =
3872                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3873                 params.supported_rates_len =
3874                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3875         }
3876
3877         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3878                 params.capability =
3879                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3880                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3881         }
3882
3883         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3884                 params.ext_capab =
3885                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3886                 params.ext_capab_len =
3887                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3888         }
3889
3890         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3891                 return -EINVAL;
3892
3893         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3894                 return -EINVAL;
3895
3896         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3897                 params.plink_action =
3898                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3899                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3900                         return -EINVAL;
3901         }
3902
3903         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3904                 params.plink_state =
3905                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3906                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3907                         return -EINVAL;
3908                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3909         }
3910
3911         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3912                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3913                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3914
3915                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3916                     pm > NL80211_MESH_POWER_MAX)
3917                         return -EINVAL;
3918
3919                 params.local_pm = pm;
3920         }
3921
3922         /* Include parameters for TDLS peer (will check later) */
3923         err = nl80211_set_station_tdls(info, &params);
3924         if (err)
3925                 return err;
3926
3927         params.vlan = get_vlan(info, rdev);
3928         if (IS_ERR(params.vlan))
3929                 return PTR_ERR(params.vlan);
3930
3931         switch (dev->ieee80211_ptr->iftype) {
3932         case NL80211_IFTYPE_AP:
3933         case NL80211_IFTYPE_AP_VLAN:
3934         case NL80211_IFTYPE_P2P_GO:
3935         case NL80211_IFTYPE_P2P_CLIENT:
3936         case NL80211_IFTYPE_STATION:
3937         case NL80211_IFTYPE_ADHOC:
3938         case NL80211_IFTYPE_MESH_POINT:
3939                 break;
3940         default:
3941                 err = -EOPNOTSUPP;
3942                 goto out_put_vlan;
3943         }
3944
3945         /* driver will call cfg80211_check_station_change() */
3946         err = rdev_change_station(rdev, dev, mac_addr, &params);
3947
3948  out_put_vlan:
3949         if (params.vlan)
3950                 dev_put(params.vlan);
3951
3952         return err;
3953 }
3954
3955 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3956 {
3957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3958         int err;
3959         struct net_device *dev = info->user_ptr[1];
3960         struct station_parameters params;
3961         u8 *mac_addr = NULL;
3962
3963         memset(&params, 0, sizeof(params));
3964
3965         if (!rdev->ops->add_station)
3966                 return -EOPNOTSUPP;
3967
3968         if (!info->attrs[NL80211_ATTR_MAC])
3969                 return -EINVAL;
3970
3971         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3972                 return -EINVAL;
3973
3974         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3975                 return -EINVAL;
3976
3977         if (!info->attrs[NL80211_ATTR_STA_AID])
3978                 return -EINVAL;
3979
3980         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3981         params.supported_rates =
3982                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3983         params.supported_rates_len =
3984                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3985         params.listen_interval =
3986                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3987
3988         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3989         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3990                 return -EINVAL;
3991
3992         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3993                 params.capability =
3994                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3995                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3996         }
3997
3998         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3999                 params.ext_capab =
4000                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4001                 params.ext_capab_len =
4002                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4003         }
4004
4005         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4006                 params.ht_capa =
4007                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4008
4009         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4010                 params.vht_capa =
4011                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4012
4013         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4014                 params.plink_action =
4015                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4016                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4017                         return -EINVAL;
4018         }
4019
4020         err = nl80211_parse_sta_wme(info, &params);
4021         if (err)
4022                 return err;
4023
4024         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4025                 return -EINVAL;
4026
4027         /* When you run into this, adjust the code below for the new flag */
4028         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4029
4030         switch (dev->ieee80211_ptr->iftype) {
4031         case NL80211_IFTYPE_AP:
4032         case NL80211_IFTYPE_AP_VLAN:
4033         case NL80211_IFTYPE_P2P_GO:
4034                 /* ignore WME attributes if iface/sta is not capable */
4035                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4036                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4037                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4038
4039                 /* TDLS peers cannot be added */
4040                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4041                         return -EINVAL;
4042                 /* but don't bother the driver with it */
4043                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4044
4045                 /* allow authenticated/associated only if driver handles it */
4046                 if (!(rdev->wiphy.features &
4047                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4048                     params.sta_flags_mask &
4049                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4050                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4051                         return -EINVAL;
4052
4053                 /* must be last in here for error handling */
4054                 params.vlan = get_vlan(info, rdev);
4055                 if (IS_ERR(params.vlan))
4056                         return PTR_ERR(params.vlan);
4057                 break;
4058         case NL80211_IFTYPE_MESH_POINT:
4059                 /* ignore uAPSD data */
4060                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4061
4062                 /* associated is disallowed */
4063                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4064                         return -EINVAL;
4065                 /* TDLS peers cannot be added */
4066                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4067                         return -EINVAL;
4068                 break;
4069         case NL80211_IFTYPE_STATION:
4070         case NL80211_IFTYPE_P2P_CLIENT:
4071                 /* ignore uAPSD data */
4072                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4073
4074                 /* these are disallowed */
4075                 if (params.sta_flags_mask &
4076                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4077                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4078                         return -EINVAL;
4079                 /* Only TDLS peers can be added */
4080                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4081                         return -EINVAL;
4082                 /* Can only add if TDLS ... */
4083                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4084                         return -EOPNOTSUPP;
4085                 /* ... with external setup is supported */
4086                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4087                         return -EOPNOTSUPP;
4088                 /*
4089                  * Older wpa_supplicant versions always mark the TDLS peer
4090                  * as authorized, but it shouldn't yet be.
4091                  */
4092                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4093                 break;
4094         default:
4095                 return -EOPNOTSUPP;
4096         }
4097
4098         /* be aware of params.vlan when changing code here */
4099
4100         err = rdev_add_station(rdev, dev, mac_addr, &params);
4101
4102         if (params.vlan)
4103                 dev_put(params.vlan);
4104         return err;
4105 }
4106
4107 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4108 {
4109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4110         struct net_device *dev = info->user_ptr[1];
4111         u8 *mac_addr = NULL;
4112
4113         if (info->attrs[NL80211_ATTR_MAC])
4114                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4115
4116         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4117             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4118             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4119             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4120                 return -EINVAL;
4121
4122         if (!rdev->ops->del_station)
4123                 return -EOPNOTSUPP;
4124
4125         return rdev_del_station(rdev, dev, mac_addr);
4126 }
4127
4128 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4129                                 int flags, struct net_device *dev,
4130                                 u8 *dst, u8 *next_hop,
4131                                 struct mpath_info *pinfo)
4132 {
4133         void *hdr;
4134         struct nlattr *pinfoattr;
4135
4136         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4137         if (!hdr)
4138                 return -1;
4139
4140         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4141             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4142             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4143             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4144                 goto nla_put_failure;
4145
4146         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4147         if (!pinfoattr)
4148                 goto nla_put_failure;
4149         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4150             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4151                         pinfo->frame_qlen))
4152                 goto nla_put_failure;
4153         if (((pinfo->filled & MPATH_INFO_SN) &&
4154              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4155             ((pinfo->filled & MPATH_INFO_METRIC) &&
4156              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4157                          pinfo->metric)) ||
4158             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4159              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4160                          pinfo->exptime)) ||
4161             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4162              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4163                         pinfo->flags)) ||
4164             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4165              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4166                          pinfo->discovery_timeout)) ||
4167             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4168              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4169                         pinfo->discovery_retries)))
4170                 goto nla_put_failure;
4171
4172         nla_nest_end(msg, pinfoattr);
4173
4174         return genlmsg_end(msg, hdr);
4175
4176  nla_put_failure:
4177         genlmsg_cancel(msg, hdr);
4178         return -EMSGSIZE;
4179 }
4180
4181 static int nl80211_dump_mpath(struct sk_buff *skb,
4182                               struct netlink_callback *cb)
4183 {
4184         struct mpath_info pinfo;
4185         struct cfg80211_registered_device *dev;
4186         struct wireless_dev *wdev;
4187         u8 dst[ETH_ALEN];
4188         u8 next_hop[ETH_ALEN];
4189         int path_idx = cb->args[2];
4190         int err;
4191
4192         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4193         if (err)
4194                 return err;
4195
4196         if (!dev->ops->dump_mpath) {
4197                 err = -EOPNOTSUPP;
4198                 goto out_err;
4199         }
4200
4201         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4202                 err = -EOPNOTSUPP;
4203                 goto out_err;
4204         }
4205
4206         while (1) {
4207                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4208                                       next_hop, &pinfo);
4209                 if (err == -ENOENT)
4210                         break;
4211                 if (err)
4212                         goto out_err;
4213
4214                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4215                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4216                                        wdev->netdev, dst, next_hop,
4217                                        &pinfo) < 0)
4218                         goto out;
4219
4220                 path_idx++;
4221         }
4222
4223
4224  out:
4225         cb->args[2] = path_idx;
4226         err = skb->len;
4227  out_err:
4228         nl80211_finish_wdev_dump(dev);
4229         return err;
4230 }
4231
4232 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4233 {
4234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4235         int err;
4236         struct net_device *dev = info->user_ptr[1];
4237         struct mpath_info pinfo;
4238         struct sk_buff *msg;
4239         u8 *dst = NULL;
4240         u8 next_hop[ETH_ALEN];
4241
4242         memset(&pinfo, 0, sizeof(pinfo));
4243
4244         if (!info->attrs[NL80211_ATTR_MAC])
4245                 return -EINVAL;
4246
4247         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4248
4249         if (!rdev->ops->get_mpath)
4250                 return -EOPNOTSUPP;
4251
4252         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4253                 return -EOPNOTSUPP;
4254
4255         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4256         if (err)
4257                 return err;
4258
4259         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4260         if (!msg)
4261                 return -ENOMEM;
4262
4263         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4264                                  dev, dst, next_hop, &pinfo) < 0) {
4265                 nlmsg_free(msg);
4266                 return -ENOBUFS;
4267         }
4268
4269         return genlmsg_reply(msg, info);
4270 }
4271
4272 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4273 {
4274         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4275         struct net_device *dev = info->user_ptr[1];
4276         u8 *dst = NULL;
4277         u8 *next_hop = NULL;
4278
4279         if (!info->attrs[NL80211_ATTR_MAC])
4280                 return -EINVAL;
4281
4282         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4283                 return -EINVAL;
4284
4285         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4286         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4287
4288         if (!rdev->ops->change_mpath)
4289                 return -EOPNOTSUPP;
4290
4291         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4292                 return -EOPNOTSUPP;
4293
4294         return rdev_change_mpath(rdev, dev, dst, next_hop);
4295 }
4296
4297 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4298 {
4299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4300         struct net_device *dev = info->user_ptr[1];
4301         u8 *dst = NULL;
4302         u8 *next_hop = NULL;
4303
4304         if (!info->attrs[NL80211_ATTR_MAC])
4305                 return -EINVAL;
4306
4307         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4308                 return -EINVAL;
4309
4310         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4311         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4312
4313         if (!rdev->ops->add_mpath)
4314                 return -EOPNOTSUPP;
4315
4316         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4317                 return -EOPNOTSUPP;
4318
4319         return rdev_add_mpath(rdev, dev, dst, next_hop);
4320 }
4321
4322 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4323 {
4324         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4325         struct net_device *dev = info->user_ptr[1];
4326         u8 *dst = NULL;
4327
4328         if (info->attrs[NL80211_ATTR_MAC])
4329                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4330
4331         if (!rdev->ops->del_mpath)
4332                 return -EOPNOTSUPP;
4333
4334         return rdev_del_mpath(rdev, dev, dst);
4335 }
4336
4337 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4338 {
4339         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4340         struct net_device *dev = info->user_ptr[1];
4341         struct bss_parameters params;
4342
4343         memset(&params, 0, sizeof(params));
4344         /* default to not changing parameters */
4345         params.use_cts_prot = -1;
4346         params.use_short_preamble = -1;
4347         params.use_short_slot_time = -1;
4348         params.ap_isolate = -1;
4349         params.ht_opmode = -1;
4350         params.p2p_ctwindow = -1;
4351         params.p2p_opp_ps = -1;
4352
4353         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4354                 params.use_cts_prot =
4355                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4356         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4357                 params.use_short_preamble =
4358                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4359         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4360                 params.use_short_slot_time =
4361                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4362         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4363                 params.basic_rates =
4364                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4365                 params.basic_rates_len =
4366                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4367         }
4368         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4369                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4370         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4371                 params.ht_opmode =
4372                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4373
4374         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4375                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4376                         return -EINVAL;
4377                 params.p2p_ctwindow =
4378                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4379                 if (params.p2p_ctwindow < 0)
4380                         return -EINVAL;
4381                 if (params.p2p_ctwindow != 0 &&
4382                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4383                         return -EINVAL;
4384         }
4385
4386         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4387                 u8 tmp;
4388
4389                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4390                         return -EINVAL;
4391                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4392                 if (tmp > 1)
4393                         return -EINVAL;
4394                 params.p2p_opp_ps = tmp;
4395                 if (params.p2p_opp_ps &&
4396                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4397                         return -EINVAL;
4398         }
4399
4400         if (!rdev->ops->change_bss)
4401                 return -EOPNOTSUPP;
4402
4403         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4404             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4405                 return -EOPNOTSUPP;
4406
4407         return rdev_change_bss(rdev, dev, &params);
4408 }
4409
4410 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4411         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4412         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4413         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4414         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4415         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4416         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4417 };
4418
4419 static int parse_reg_rule(struct nlattr *tb[],
4420         struct ieee80211_reg_rule *reg_rule)
4421 {
4422         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4423         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4424
4425         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4426                 return -EINVAL;
4427         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4428                 return -EINVAL;
4429         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4430                 return -EINVAL;
4431         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4432                 return -EINVAL;
4433         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4434                 return -EINVAL;
4435
4436         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4437
4438         freq_range->start_freq_khz =
4439                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4440         freq_range->end_freq_khz =
4441                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4442         freq_range->max_bandwidth_khz =
4443                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4444
4445         power_rule->max_eirp =
4446                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4447
4448         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4449                 power_rule->max_antenna_gain =
4450                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4451
4452         return 0;
4453 }
4454
4455 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4456 {
4457         int r;
4458         char *data = NULL;
4459         enum nl80211_user_reg_hint_type user_reg_hint_type;
4460
4461         /*
4462          * You should only get this when cfg80211 hasn't yet initialized
4463          * completely when built-in to the kernel right between the time
4464          * window between nl80211_init() and regulatory_init(), if that is
4465          * even possible.
4466          */
4467         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4468                 return -EINPROGRESS;
4469
4470         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4471                 return -EINVAL;
4472
4473         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4474
4475         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4476                 user_reg_hint_type =
4477                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4478         else
4479                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4480
4481         switch (user_reg_hint_type) {
4482         case NL80211_USER_REG_HINT_USER:
4483         case NL80211_USER_REG_HINT_CELL_BASE:
4484                 break;
4485         default:
4486                 return -EINVAL;
4487         }
4488
4489         r = regulatory_hint_user(data, user_reg_hint_type);
4490
4491         return r;
4492 }
4493
4494 static int nl80211_get_mesh_config(struct sk_buff *skb,
4495                                    struct genl_info *info)
4496 {
4497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4498         struct net_device *dev = info->user_ptr[1];
4499         struct wireless_dev *wdev = dev->ieee80211_ptr;
4500         struct mesh_config cur_params;
4501         int err = 0;
4502         void *hdr;
4503         struct nlattr *pinfoattr;
4504         struct sk_buff *msg;
4505
4506         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4507                 return -EOPNOTSUPP;
4508
4509         if (!rdev->ops->get_mesh_config)
4510                 return -EOPNOTSUPP;
4511
4512         wdev_lock(wdev);
4513         /* If not connected, get default parameters */
4514         if (!wdev->mesh_id_len)
4515                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4516         else
4517                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4518         wdev_unlock(wdev);
4519
4520         if (err)
4521                 return err;
4522
4523         /* Draw up a netlink message to send back */
4524         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4525         if (!msg)
4526                 return -ENOMEM;
4527         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4528                              NL80211_CMD_GET_MESH_CONFIG);
4529         if (!hdr)
4530                 goto out;
4531         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4532         if (!pinfoattr)
4533                 goto nla_put_failure;
4534         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4535             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4536                         cur_params.dot11MeshRetryTimeout) ||
4537             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4538                         cur_params.dot11MeshConfirmTimeout) ||
4539             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4540                         cur_params.dot11MeshHoldingTimeout) ||
4541             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4542                         cur_params.dot11MeshMaxPeerLinks) ||
4543             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4544                        cur_params.dot11MeshMaxRetries) ||
4545             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4546                        cur_params.dot11MeshTTL) ||
4547             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4548                        cur_params.element_ttl) ||
4549             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4550                        cur_params.auto_open_plinks) ||
4551             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4552                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4553             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4554                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4555             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4556                         cur_params.path_refresh_time) ||
4557             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4558                         cur_params.min_discovery_timeout) ||
4559             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4560                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4561             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4562                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4563             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4564                         cur_params.dot11MeshHWMPperrMinInterval) ||
4565             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4566                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4567             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4568                        cur_params.dot11MeshHWMPRootMode) ||
4569             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4570                         cur_params.dot11MeshHWMPRannInterval) ||
4571             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4572                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4573             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4574                        cur_params.dot11MeshForwarding) ||
4575             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4576                         cur_params.rssi_threshold) ||
4577             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4578                         cur_params.ht_opmode) ||
4579             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4580                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4581             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4582                         cur_params.dot11MeshHWMProotInterval) ||
4583             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4584                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4585             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4586                         cur_params.power_mode) ||
4587             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4588                         cur_params.dot11MeshAwakeWindowDuration))
4589                 goto nla_put_failure;
4590         nla_nest_end(msg, pinfoattr);
4591         genlmsg_end(msg, hdr);
4592         return genlmsg_reply(msg, info);
4593
4594  nla_put_failure:
4595         genlmsg_cancel(msg, hdr);
4596  out:
4597         nlmsg_free(msg);
4598         return -ENOBUFS;
4599 }
4600
4601 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4602         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4603         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4604         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4605         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4606         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4607         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4608         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4609         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4610         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4611         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4612         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4613         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4614         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4615         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4616         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4617         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4618         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4619         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4620         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4621         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4622         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4623         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4624         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4625         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4626         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4627         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4628         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4629 };
4630
4631 static const struct nla_policy
4632         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4633         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4634         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4635         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4636         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4637         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4638         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4639                                     .len = IEEE80211_MAX_DATA_LEN },
4640         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4641 };
4642
4643 static int nl80211_parse_mesh_config(struct genl_info *info,
4644                                      struct mesh_config *cfg,
4645                                      u32 *mask_out)
4646 {
4647         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4648         u32 mask = 0;
4649
4650 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4651 do {                                                                        \
4652         if (tb[attr]) {                                                     \
4653                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4654                         return -EINVAL;                                     \
4655                 cfg->param = fn(tb[attr]);                                  \
4656                 mask |= (1 << (attr - 1));                                  \
4657         }                                                                   \
4658 } while (0)
4659
4660
4661         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4662                 return -EINVAL;
4663         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4664                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4665                              nl80211_meshconf_params_policy))
4666                 return -EINVAL;
4667
4668         /* This makes sure that there aren't more than 32 mesh config
4669          * parameters (otherwise our bitfield scheme would not work.) */
4670         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4671
4672         /* Fill in the params struct */
4673         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4674                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4675                                   nla_get_u16);
4676         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4677                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4678                                   nla_get_u16);
4679         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4680                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4681                                   nla_get_u16);
4682         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4683                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4684                                   nla_get_u16);
4685         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4686                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4687                                   nla_get_u8);
4688         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4689                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4691                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4692                                   nla_get_u8);
4693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4694                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4695                                   nla_get_u8);
4696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4697                                   1, 255, mask,
4698                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4699                                   nla_get_u32);
4700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4701                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4702                                   nla_get_u8);
4703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4704                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4705                                   nla_get_u32);
4706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4707                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4708                                   nla_get_u16);
4709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4710                                   1, 65535, mask,
4711                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4712                                   nla_get_u32);
4713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4714                                   1, 65535, mask,
4715                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4716                                   nla_get_u16);
4717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4718                                   1, 65535, mask,
4719                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4720                                   nla_get_u16);
4721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4722                                   dot11MeshHWMPnetDiameterTraversalTime,
4723                                   1, 65535, mask,
4724                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4725                                   nla_get_u16);
4726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4727                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4728                                   nla_get_u8);
4729         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4730                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4731                                   nla_get_u16);
4732         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4733                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4734                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4735                                   nla_get_u8);
4736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4737                                   mask, NL80211_MESHCONF_FORWARDING,
4738                                   nla_get_u8);
4739         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4740                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4741                                   nla_get_u32);
4742         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4743                                   mask, NL80211_MESHCONF_HT_OPMODE,
4744                                   nla_get_u16);
4745         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4746                                   1, 65535, mask,
4747                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4748                                   nla_get_u32);
4749         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4750                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4751                                   nla_get_u16);
4752         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4753                                   dot11MeshHWMPconfirmationInterval,
4754                                   1, 65535, mask,
4755                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4756                                   nla_get_u16);
4757         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4758                                   NL80211_MESH_POWER_ACTIVE,
4759                                   NL80211_MESH_POWER_MAX,
4760                                   mask, NL80211_MESHCONF_POWER_MODE,
4761                                   nla_get_u32);
4762         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4763                                   0, 65535, mask,
4764                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4765         if (mask_out)
4766                 *mask_out = mask;
4767
4768         return 0;
4769
4770 #undef FILL_IN_MESH_PARAM_IF_SET
4771 }
4772
4773 static int nl80211_parse_mesh_setup(struct genl_info *info,
4774                                      struct mesh_setup *setup)
4775 {
4776         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4777         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4778
4779         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4780                 return -EINVAL;
4781         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4782                              info->attrs[NL80211_ATTR_MESH_SETUP],
4783                              nl80211_mesh_setup_params_policy))
4784                 return -EINVAL;
4785
4786         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4787                 setup->sync_method =
4788                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4789                  IEEE80211_SYNC_METHOD_VENDOR :
4790                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4791
4792         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4793                 setup->path_sel_proto =
4794                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4795                  IEEE80211_PATH_PROTOCOL_VENDOR :
4796                  IEEE80211_PATH_PROTOCOL_HWMP;
4797
4798         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4799                 setup->path_metric =
4800                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4801                  IEEE80211_PATH_METRIC_VENDOR :
4802                  IEEE80211_PATH_METRIC_AIRTIME;
4803
4804
4805         if (tb[NL80211_MESH_SETUP_IE]) {
4806                 struct nlattr *ieattr =
4807                         tb[NL80211_MESH_SETUP_IE];
4808                 if (!is_valid_ie_attr(ieattr))
4809                         return -EINVAL;
4810                 setup->ie = nla_data(ieattr);
4811                 setup->ie_len = nla_len(ieattr);
4812         }
4813         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4814             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4815                 return -EINVAL;
4816         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4817         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4818         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4819         if (setup->is_secure)
4820                 setup->user_mpm = true;
4821
4822         return 0;
4823 }
4824
4825 static int nl80211_update_mesh_config(struct sk_buff *skb,
4826                                       struct genl_info *info)
4827 {
4828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4829         struct net_device *dev = info->user_ptr[1];
4830         struct wireless_dev *wdev = dev->ieee80211_ptr;
4831         struct mesh_config cfg;
4832         u32 mask;
4833         int err;
4834
4835         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4836                 return -EOPNOTSUPP;
4837
4838         if (!rdev->ops->update_mesh_config)
4839                 return -EOPNOTSUPP;
4840
4841         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4842         if (err)
4843                 return err;
4844
4845         wdev_lock(wdev);
4846         if (!wdev->mesh_id_len)
4847                 err = -ENOLINK;
4848
4849         if (!err)
4850                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4851
4852         wdev_unlock(wdev);
4853
4854         return err;
4855 }
4856
4857 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4858 {
4859         const struct ieee80211_regdomain *regdom;
4860         struct sk_buff *msg;
4861         void *hdr = NULL;
4862         struct nlattr *nl_reg_rules;
4863         unsigned int i;
4864         int err = -EINVAL;
4865
4866         mutex_lock(&cfg80211_mutex);
4867
4868         if (!cfg80211_regdomain)
4869                 goto out;
4870
4871         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4872         if (!msg) {
4873                 err = -ENOBUFS;
4874                 goto out;
4875         }
4876
4877         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4878                              NL80211_CMD_GET_REG);
4879         if (!hdr)
4880                 goto put_failure;
4881
4882         if (reg_last_request_cell_base() &&
4883             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4884                         NL80211_USER_REG_HINT_CELL_BASE))
4885                 goto nla_put_failure;
4886
4887         rcu_read_lock();
4888         regdom = rcu_dereference(cfg80211_regdomain);
4889
4890         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4891             (regdom->dfs_region &&
4892              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4893                 goto nla_put_failure_rcu;
4894
4895         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4896         if (!nl_reg_rules)
4897                 goto nla_put_failure_rcu;
4898
4899         for (i = 0; i < regdom->n_reg_rules; i++) {
4900                 struct nlattr *nl_reg_rule;
4901                 const struct ieee80211_reg_rule *reg_rule;
4902                 const struct ieee80211_freq_range *freq_range;
4903                 const struct ieee80211_power_rule *power_rule;
4904
4905                 reg_rule = &regdom->reg_rules[i];
4906                 freq_range = &reg_rule->freq_range;
4907                 power_rule = &reg_rule->power_rule;
4908
4909                 nl_reg_rule = nla_nest_start(msg, i);
4910                 if (!nl_reg_rule)
4911                         goto nla_put_failure_rcu;
4912
4913                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4914                                 reg_rule->flags) ||
4915                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4916                                 freq_range->start_freq_khz) ||
4917                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4918                                 freq_range->end_freq_khz) ||
4919                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4920                                 freq_range->max_bandwidth_khz) ||
4921                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4922                                 power_rule->max_antenna_gain) ||
4923                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4924                                 power_rule->max_eirp))
4925                         goto nla_put_failure_rcu;
4926
4927                 nla_nest_end(msg, nl_reg_rule);
4928         }
4929         rcu_read_unlock();
4930
4931         nla_nest_end(msg, nl_reg_rules);
4932
4933         genlmsg_end(msg, hdr);
4934         err = genlmsg_reply(msg, info);
4935         goto out;
4936
4937 nla_put_failure_rcu:
4938         rcu_read_unlock();
4939 nla_put_failure:
4940         genlmsg_cancel(msg, hdr);
4941 put_failure:
4942         nlmsg_free(msg);
4943         err = -EMSGSIZE;
4944 out:
4945         mutex_unlock(&cfg80211_mutex);
4946         return err;
4947 }
4948
4949 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4950 {
4951         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4952         struct nlattr *nl_reg_rule;
4953         char *alpha2 = NULL;
4954         int rem_reg_rules = 0, r = 0;
4955         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4956         u8 dfs_region = 0;
4957         struct ieee80211_regdomain *rd = NULL;
4958
4959         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4960                 return -EINVAL;
4961
4962         if (!info->attrs[NL80211_ATTR_REG_RULES])
4963                 return -EINVAL;
4964
4965         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4966
4967         if (info->attrs[NL80211_ATTR_DFS_REGION])
4968                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4969
4970         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4971                             rem_reg_rules) {
4972                 num_rules++;
4973                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4974                         return -EINVAL;
4975         }
4976
4977         size_of_regd = sizeof(struct ieee80211_regdomain) +
4978                        num_rules * sizeof(struct ieee80211_reg_rule);
4979
4980         rd = kzalloc(size_of_regd, GFP_KERNEL);
4981         if (!rd)
4982                 return -ENOMEM;
4983
4984         rd->n_reg_rules = num_rules;
4985         rd->alpha2[0] = alpha2[0];
4986         rd->alpha2[1] = alpha2[1];
4987
4988         /*
4989          * Disable DFS master mode if the DFS region was
4990          * not supported or known on this kernel.
4991          */
4992         if (reg_supported_dfs_region(dfs_region))
4993                 rd->dfs_region = dfs_region;
4994
4995         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4996                             rem_reg_rules) {
4997                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4998                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4999                           reg_rule_policy);
5000                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5001                 if (r)
5002                         goto bad_reg;
5003
5004                 rule_idx++;
5005
5006                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5007                         r = -EINVAL;
5008                         goto bad_reg;
5009                 }
5010         }
5011
5012         mutex_lock(&cfg80211_mutex);
5013
5014         r = set_regdom(rd);
5015         /* set_regdom took ownership */
5016         rd = NULL;
5017         mutex_unlock(&cfg80211_mutex);
5018
5019  bad_reg:
5020         kfree(rd);
5021         return r;
5022 }
5023
5024 static int validate_scan_freqs(struct nlattr *freqs)
5025 {
5026         struct nlattr *attr1, *attr2;
5027         int n_channels = 0, tmp1, tmp2;
5028
5029         nla_for_each_nested(attr1, freqs, tmp1) {
5030                 n_channels++;
5031                 /*
5032                  * Some hardware has a limited channel list for
5033                  * scanning, and it is pretty much nonsensical
5034                  * to scan for a channel twice, so disallow that
5035                  * and don't require drivers to check that the
5036                  * channel list they get isn't longer than what
5037                  * they can scan, as long as they can scan all
5038                  * the channels they registered at once.
5039                  */
5040                 nla_for_each_nested(attr2, freqs, tmp2)
5041                         if (attr1 != attr2 &&
5042                             nla_get_u32(attr1) == nla_get_u32(attr2))
5043                                 return 0;
5044         }
5045
5046         return n_channels;
5047 }
5048
5049 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5050 {
5051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5052         struct wireless_dev *wdev = info->user_ptr[1];
5053         struct cfg80211_scan_request *request;
5054         struct nlattr *attr;
5055         struct wiphy *wiphy;
5056         int err, tmp, n_ssids = 0, n_channels, i;
5057         size_t ie_len;
5058
5059         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5060                 return -EINVAL;
5061
5062         wiphy = &rdev->wiphy;
5063
5064         if (!rdev->ops->scan)
5065                 return -EOPNOTSUPP;
5066
5067         mutex_lock(&rdev->sched_scan_mtx);
5068         if (rdev->scan_req) {
5069                 err = -EBUSY;
5070                 goto unlock;
5071         }
5072
5073         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5074                 n_channels = validate_scan_freqs(
5075                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5076                 if (!n_channels) {
5077                         err = -EINVAL;
5078                         goto unlock;
5079                 }
5080         } else {
5081                 enum ieee80211_band band;
5082                 n_channels = 0;
5083
5084                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5085                         if (wiphy->bands[band])
5086                                 n_channels += wiphy->bands[band]->n_channels;
5087         }
5088
5089         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5090                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5091                         n_ssids++;
5092
5093         if (n_ssids > wiphy->max_scan_ssids) {
5094                 err = -EINVAL;
5095                 goto unlock;
5096         }
5097
5098         if (info->attrs[NL80211_ATTR_IE])
5099                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5100         else
5101                 ie_len = 0;
5102
5103         if (ie_len > wiphy->max_scan_ie_len) {
5104                 err = -EINVAL;
5105                 goto unlock;
5106         }
5107
5108         request = kzalloc(sizeof(*request)
5109                         + sizeof(*request->ssids) * n_ssids
5110                         + sizeof(*request->channels) * n_channels
5111                         + ie_len, GFP_KERNEL);
5112         if (!request) {
5113                 err = -ENOMEM;
5114                 goto unlock;
5115         }
5116
5117         if (n_ssids)
5118                 request->ssids = (void *)&request->channels[n_channels];
5119         request->n_ssids = n_ssids;
5120         if (ie_len) {
5121                 if (request->ssids)
5122                         request->ie = (void *)(request->ssids + n_ssids);
5123                 else
5124                         request->ie = (void *)(request->channels + n_channels);
5125         }
5126
5127         i = 0;
5128         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5129                 /* user specified, bail out if channel not found */
5130                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5131                         struct ieee80211_channel *chan;
5132
5133                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5134
5135                         if (!chan) {
5136                                 err = -EINVAL;
5137                                 goto out_free;
5138                         }
5139
5140                         /* ignore disabled channels */
5141                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5142                                 continue;
5143
5144                         request->channels[i] = chan;
5145                         i++;
5146                 }
5147         } else {
5148                 enum ieee80211_band band;
5149
5150                 /* all channels */
5151                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5152                         int j;
5153                         if (!wiphy->bands[band])
5154                                 continue;
5155                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5156                                 struct ieee80211_channel *chan;
5157
5158                                 chan = &wiphy->bands[band]->channels[j];
5159
5160                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5161                                         continue;
5162
5163                                 request->channels[i] = chan;
5164                                 i++;
5165                         }
5166                 }
5167         }
5168
5169         if (!i) {
5170                 err = -EINVAL;
5171                 goto out_free;
5172         }
5173
5174         request->n_channels = i;
5175
5176         i = 0;
5177         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5178                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5179                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5180                                 err = -EINVAL;
5181                                 goto out_free;
5182                         }
5183                         request->ssids[i].ssid_len = nla_len(attr);
5184                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5185                         i++;
5186                 }
5187         }
5188
5189         if (info->attrs[NL80211_ATTR_IE]) {
5190                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5191                 memcpy((void *)request->ie,
5192                        nla_data(info->attrs[NL80211_ATTR_IE]),
5193                        request->ie_len);
5194         }
5195
5196         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5197                 if (wiphy->bands[i])
5198                         request->rates[i] =
5199                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5200
5201         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5202                 nla_for_each_nested(attr,
5203                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5204                                     tmp) {
5205                         enum ieee80211_band band = nla_type(attr);
5206
5207                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5208                                 err = -EINVAL;
5209                                 goto out_free;
5210                         }
5211                         err = ieee80211_get_ratemask(wiphy->bands[band],
5212                                                      nla_data(attr),
5213                                                      nla_len(attr),
5214                                                      &request->rates[band]);
5215                         if (err)
5216                                 goto out_free;
5217                 }
5218         }
5219
5220         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5221                 request->flags = nla_get_u32(
5222                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5223                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5224                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5225                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5226                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5227                         err = -EOPNOTSUPP;
5228                         goto out_free;
5229                 }
5230         }
5231
5232         request->no_cck =
5233                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5234
5235         request->wdev = wdev;
5236         request->wiphy = &rdev->wiphy;
5237         request->scan_start = jiffies;
5238
5239         rdev->scan_req = request;
5240         err = rdev_scan(rdev, request);
5241
5242         if (!err) {
5243                 nl80211_send_scan_start(rdev, wdev);
5244                 if (wdev->netdev)
5245                         dev_hold(wdev->netdev);
5246         } else {
5247  out_free:
5248                 rdev->scan_req = NULL;
5249                 kfree(request);
5250         }
5251
5252  unlock:
5253         mutex_unlock(&rdev->sched_scan_mtx);
5254         return err;
5255 }
5256
5257 static int nl80211_start_sched_scan(struct sk_buff *skb,
5258                                     struct genl_info *info)
5259 {
5260         struct cfg80211_sched_scan_request *request;
5261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5262         struct net_device *dev = info->user_ptr[1];
5263         struct nlattr *attr;
5264         struct wiphy *wiphy;
5265         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5266         u32 interval;
5267         enum ieee80211_band band;
5268         size_t ie_len;
5269         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5270
5271         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5272             !rdev->ops->sched_scan_start)
5273                 return -EOPNOTSUPP;
5274
5275         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5276                 return -EINVAL;
5277
5278         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5279                 return -EINVAL;
5280
5281         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5282         if (interval == 0)
5283                 return -EINVAL;
5284
5285         wiphy = &rdev->wiphy;
5286
5287         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5288                 n_channels = validate_scan_freqs(
5289                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5290                 if (!n_channels)
5291                         return -EINVAL;
5292         } else {
5293                 n_channels = 0;
5294
5295                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5296                         if (wiphy->bands[band])
5297                                 n_channels += wiphy->bands[band]->n_channels;
5298         }
5299
5300         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5301                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5302                                     tmp)
5303                         n_ssids++;
5304
5305         if (n_ssids > wiphy->max_sched_scan_ssids)
5306                 return -EINVAL;
5307
5308         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5309                 nla_for_each_nested(attr,
5310                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5311                                     tmp)
5312                         n_match_sets++;
5313
5314         if (n_match_sets > wiphy->max_match_sets)
5315                 return -EINVAL;
5316
5317         if (info->attrs[NL80211_ATTR_IE])
5318                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5319         else
5320                 ie_len = 0;
5321
5322         if (ie_len > wiphy->max_sched_scan_ie_len)
5323                 return -EINVAL;
5324
5325         mutex_lock(&rdev->sched_scan_mtx);
5326
5327         if (rdev->sched_scan_req) {
5328                 err = -EINPROGRESS;
5329                 goto out;
5330         }
5331
5332         request = kzalloc(sizeof(*request)
5333                         + sizeof(*request->ssids) * n_ssids
5334                         + sizeof(*request->match_sets) * n_match_sets
5335                         + sizeof(*request->channels) * n_channels
5336                         + ie_len, GFP_KERNEL);
5337         if (!request) {
5338                 err = -ENOMEM;
5339                 goto out;
5340         }
5341
5342         if (n_ssids)
5343                 request->ssids = (void *)&request->channels[n_channels];
5344         request->n_ssids = n_ssids;
5345         if (ie_len) {
5346                 if (request->ssids)
5347                         request->ie = (void *)(request->ssids + n_ssids);
5348                 else
5349                         request->ie = (void *)(request->channels + n_channels);
5350         }
5351
5352         if (n_match_sets) {
5353                 if (request->ie)
5354                         request->match_sets = (void *)(request->ie + ie_len);
5355                 else if (request->ssids)
5356                         request->match_sets =
5357                                 (void *)(request->ssids + n_ssids);
5358                 else
5359                         request->match_sets =
5360                                 (void *)(request->channels + n_channels);
5361         }
5362         request->n_match_sets = n_match_sets;
5363
5364         i = 0;
5365         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5366                 /* user specified, bail out if channel not found */
5367                 nla_for_each_nested(attr,
5368                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5369                                     tmp) {
5370                         struct ieee80211_channel *chan;
5371
5372                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5373
5374                         if (!chan) {
5375                                 err = -EINVAL;
5376                                 goto out_free;
5377                         }
5378
5379                         /* ignore disabled channels */
5380                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5381                                 continue;
5382
5383                         request->channels[i] = chan;
5384                         i++;
5385                 }
5386         } else {
5387                 /* all channels */
5388                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5389                         int j;
5390                         if (!wiphy->bands[band])
5391                                 continue;
5392                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5393                                 struct ieee80211_channel *chan;
5394
5395                                 chan = &wiphy->bands[band]->channels[j];
5396
5397                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5398                                         continue;
5399
5400                                 request->channels[i] = chan;
5401                                 i++;
5402                         }
5403                 }
5404         }
5405
5406         if (!i) {
5407                 err = -EINVAL;
5408                 goto out_free;
5409         }
5410
5411         request->n_channels = i;
5412
5413         i = 0;
5414         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5415                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5416                                     tmp) {
5417                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5418                                 err = -EINVAL;
5419                                 goto out_free;
5420                         }
5421                         request->ssids[i].ssid_len = nla_len(attr);
5422                         memcpy(request->ssids[i].ssid, nla_data(attr),
5423                                nla_len(attr));
5424                         i++;
5425                 }
5426         }
5427
5428         i = 0;
5429         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5430                 nla_for_each_nested(attr,
5431                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5432                                     tmp) {
5433                         struct nlattr *ssid, *rssi;
5434
5435                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5436                                   nla_data(attr), nla_len(attr),
5437                                   nl80211_match_policy);
5438                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5439                         if (ssid) {
5440                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5441                                         err = -EINVAL;
5442                                         goto out_free;
5443                                 }
5444                                 memcpy(request->match_sets[i].ssid.ssid,
5445                                        nla_data(ssid), nla_len(ssid));
5446                                 request->match_sets[i].ssid.ssid_len =
5447                                         nla_len(ssid);
5448                         }
5449                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5450                         if (rssi)
5451                                 request->rssi_thold = nla_get_u32(rssi);
5452                         else
5453                                 request->rssi_thold =
5454                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5455                         i++;
5456                 }
5457         }
5458
5459         if (info->attrs[NL80211_ATTR_IE]) {
5460                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5461                 memcpy((void *)request->ie,
5462                        nla_data(info->attrs[NL80211_ATTR_IE]),
5463                        request->ie_len);
5464         }
5465
5466         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5467                 request->flags = nla_get_u32(
5468                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5469                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5470                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5471                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5472                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5473                         err = -EOPNOTSUPP;
5474                         goto out_free;
5475                 }
5476         }
5477
5478         request->dev = dev;
5479         request->wiphy = &rdev->wiphy;
5480         request->interval = interval;
5481         request->scan_start = jiffies;
5482
5483         err = rdev_sched_scan_start(rdev, dev, request);
5484         if (!err) {
5485                 rdev->sched_scan_req = request;
5486                 nl80211_send_sched_scan(rdev, dev,
5487                                         NL80211_CMD_START_SCHED_SCAN);
5488                 goto out;
5489         }
5490
5491 out_free:
5492         kfree(request);
5493 out:
5494         mutex_unlock(&rdev->sched_scan_mtx);
5495         return err;
5496 }
5497
5498 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5499                                    struct genl_info *info)
5500 {
5501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5502         int err;
5503
5504         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5505             !rdev->ops->sched_scan_stop)
5506                 return -EOPNOTSUPP;
5507
5508         mutex_lock(&rdev->sched_scan_mtx);
5509         err = __cfg80211_stop_sched_scan(rdev, false);
5510         mutex_unlock(&rdev->sched_scan_mtx);
5511
5512         return err;
5513 }
5514
5515 static int nl80211_start_radar_detection(struct sk_buff *skb,
5516                                          struct genl_info *info)
5517 {
5518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5519         struct net_device *dev = info->user_ptr[1];
5520         struct wireless_dev *wdev = dev->ieee80211_ptr;
5521         struct cfg80211_chan_def chandef;
5522         int err;
5523
5524         err = nl80211_parse_chandef(rdev, info, &chandef);
5525         if (err)
5526                 return err;
5527
5528         if (wdev->cac_started)
5529                 return -EBUSY;
5530
5531         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5532         if (err < 0)
5533                 return err;
5534
5535         if (err == 0)
5536                 return -EINVAL;
5537
5538         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5539                 return -EINVAL;
5540
5541         if (!rdev->ops->start_radar_detection)
5542                 return -EOPNOTSUPP;
5543
5544         mutex_lock(&rdev->devlist_mtx);
5545         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5546                                            chandef.chan, CHAN_MODE_SHARED,
5547                                            BIT(chandef.width));
5548         if (err)
5549                 goto err_locked;
5550
5551         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5552         if (!err) {
5553                 wdev->channel = chandef.chan;
5554                 wdev->cac_started = true;
5555                 wdev->cac_start_time = jiffies;
5556         }
5557 err_locked:
5558         mutex_unlock(&rdev->devlist_mtx);
5559
5560         return err;
5561 }
5562
5563 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5564                             u32 seq, int flags,
5565                             struct cfg80211_registered_device *rdev,
5566                             struct wireless_dev *wdev,
5567                             struct cfg80211_internal_bss *intbss)
5568 {
5569         struct cfg80211_bss *res = &intbss->pub;
5570         const struct cfg80211_bss_ies *ies;
5571         void *hdr;
5572         struct nlattr *bss;
5573         bool tsf = false;
5574
5575         ASSERT_WDEV_LOCK(wdev);
5576
5577         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5578                              NL80211_CMD_NEW_SCAN_RESULTS);
5579         if (!hdr)
5580                 return -1;
5581
5582         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5583
5584         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5585                 goto nla_put_failure;
5586         if (wdev->netdev &&
5587             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5588                 goto nla_put_failure;
5589         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5590                 goto nla_put_failure;
5591
5592         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5593         if (!bss)
5594                 goto nla_put_failure;
5595         if ((!is_zero_ether_addr(res->bssid) &&
5596              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5597                 goto nla_put_failure;
5598
5599         rcu_read_lock();
5600         ies = rcu_dereference(res->ies);
5601         if (ies) {
5602                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5603                         goto fail_unlock_rcu;
5604                 tsf = true;
5605                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5606                                         ies->len, ies->data))
5607                         goto fail_unlock_rcu;
5608         }
5609         ies = rcu_dereference(res->beacon_ies);
5610         if (ies) {
5611                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5612                         goto fail_unlock_rcu;
5613                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5614                                         ies->len, ies->data))
5615                         goto fail_unlock_rcu;
5616         }
5617         rcu_read_unlock();
5618
5619         if (res->beacon_interval &&
5620             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5621                 goto nla_put_failure;
5622         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5623             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5624             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5625                         jiffies_to_msecs(jiffies - intbss->ts)))
5626                 goto nla_put_failure;
5627
5628         switch (rdev->wiphy.signal_type) {
5629         case CFG80211_SIGNAL_TYPE_MBM:
5630                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5631                         goto nla_put_failure;
5632                 break;
5633         case CFG80211_SIGNAL_TYPE_UNSPEC:
5634                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5635                         goto nla_put_failure;
5636                 break;
5637         default:
5638                 break;
5639         }
5640
5641         switch (wdev->iftype) {
5642         case NL80211_IFTYPE_P2P_CLIENT:
5643         case NL80211_IFTYPE_STATION:
5644                 if (intbss == wdev->current_bss &&
5645                     nla_put_u32(msg, NL80211_BSS_STATUS,
5646                                 NL80211_BSS_STATUS_ASSOCIATED))
5647                         goto nla_put_failure;
5648                 break;
5649         case NL80211_IFTYPE_ADHOC:
5650                 if (intbss == wdev->current_bss &&
5651                     nla_put_u32(msg, NL80211_BSS_STATUS,
5652                                 NL80211_BSS_STATUS_IBSS_JOINED))
5653                         goto nla_put_failure;
5654                 break;
5655         default:
5656                 break;
5657         }
5658
5659         nla_nest_end(msg, bss);
5660
5661         return genlmsg_end(msg, hdr);
5662
5663  fail_unlock_rcu:
5664         rcu_read_unlock();
5665  nla_put_failure:
5666         genlmsg_cancel(msg, hdr);
5667         return -EMSGSIZE;
5668 }
5669
5670 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5671 {
5672         struct cfg80211_registered_device *rdev;
5673         struct cfg80211_internal_bss *scan;
5674         struct wireless_dev *wdev;
5675         int start = cb->args[2], idx = 0;
5676         int err;
5677
5678         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5679         if (err)
5680                 return err;
5681
5682         wdev_lock(wdev);
5683         spin_lock_bh(&rdev->bss_lock);
5684         cfg80211_bss_expire(rdev);
5685
5686         cb->seq = rdev->bss_generation;
5687
5688         list_for_each_entry(scan, &rdev->bss_list, list) {
5689                 if (++idx <= start)
5690                         continue;
5691                 if (nl80211_send_bss(skb, cb,
5692                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5693                                 rdev, wdev, scan) < 0) {
5694                         idx--;
5695                         break;
5696                 }
5697         }
5698
5699         spin_unlock_bh(&rdev->bss_lock);
5700         wdev_unlock(wdev);
5701
5702         cb->args[2] = idx;
5703         nl80211_finish_wdev_dump(rdev);
5704
5705         return skb->len;
5706 }
5707
5708 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5709                                 int flags, struct net_device *dev,
5710                                 struct survey_info *survey)
5711 {
5712         void *hdr;
5713         struct nlattr *infoattr;
5714
5715         hdr = nl80211hdr_put(msg, portid, seq, flags,
5716                              NL80211_CMD_NEW_SURVEY_RESULTS);
5717         if (!hdr)
5718                 return -ENOMEM;
5719
5720         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5721                 goto nla_put_failure;
5722
5723         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5724         if (!infoattr)
5725                 goto nla_put_failure;
5726
5727         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5728                         survey->channel->center_freq))
5729                 goto nla_put_failure;
5730
5731         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5732             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5733                 goto nla_put_failure;
5734         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5735             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5736                 goto nla_put_failure;
5737         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5738             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5739                         survey->channel_time))
5740                 goto nla_put_failure;
5741         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5742             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5743                         survey->channel_time_busy))
5744                 goto nla_put_failure;
5745         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5746             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5747                         survey->channel_time_ext_busy))
5748                 goto nla_put_failure;
5749         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5750             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5751                         survey->channel_time_rx))
5752                 goto nla_put_failure;
5753         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5754             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5755                         survey->channel_time_tx))
5756                 goto nla_put_failure;
5757
5758         nla_nest_end(msg, infoattr);
5759
5760         return genlmsg_end(msg, hdr);
5761
5762  nla_put_failure:
5763         genlmsg_cancel(msg, hdr);
5764         return -EMSGSIZE;
5765 }
5766
5767 static int nl80211_dump_survey(struct sk_buff *skb,
5768                         struct netlink_callback *cb)
5769 {
5770         struct survey_info survey;
5771         struct cfg80211_registered_device *dev;
5772         struct wireless_dev *wdev;
5773         int survey_idx = cb->args[2];
5774         int res;
5775
5776         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5777         if (res)
5778                 return res;
5779
5780         if (!wdev->netdev) {
5781                 res = -EINVAL;
5782                 goto out_err;
5783         }
5784
5785         if (!dev->ops->dump_survey) {
5786                 res = -EOPNOTSUPP;
5787                 goto out_err;
5788         }
5789
5790         while (1) {
5791                 struct ieee80211_channel *chan;
5792
5793                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5794                 if (res == -ENOENT)
5795                         break;
5796                 if (res)
5797                         goto out_err;
5798
5799                 /* Survey without a channel doesn't make sense */
5800                 if (!survey.channel) {
5801                         res = -EINVAL;
5802                         goto out;
5803                 }
5804
5805                 chan = ieee80211_get_channel(&dev->wiphy,
5806                                              survey.channel->center_freq);
5807                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5808                         survey_idx++;
5809                         continue;
5810                 }
5811
5812                 if (nl80211_send_survey(skb,
5813                                 NETLINK_CB(cb->skb).portid,
5814                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5815                                 wdev->netdev, &survey) < 0)
5816                         goto out;
5817                 survey_idx++;
5818         }
5819
5820  out:
5821         cb->args[2] = survey_idx;
5822         res = skb->len;
5823  out_err:
5824         nl80211_finish_wdev_dump(dev);
5825         return res;
5826 }
5827
5828 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5829 {
5830         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5831                                   NL80211_WPA_VERSION_2));
5832 }
5833
5834 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5835 {
5836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5837         struct net_device *dev = info->user_ptr[1];
5838         struct ieee80211_channel *chan;
5839         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5840         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5841         enum nl80211_auth_type auth_type;
5842         struct key_parse key;
5843         bool local_state_change;
5844
5845         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5846                 return -EINVAL;
5847
5848         if (!info->attrs[NL80211_ATTR_MAC])
5849                 return -EINVAL;
5850
5851         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5852                 return -EINVAL;
5853
5854         if (!info->attrs[NL80211_ATTR_SSID])
5855                 return -EINVAL;
5856
5857         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5858                 return -EINVAL;
5859
5860         err = nl80211_parse_key(info, &key);
5861         if (err)
5862                 return err;
5863
5864         if (key.idx >= 0) {
5865                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5866                         return -EINVAL;
5867                 if (!key.p.key || !key.p.key_len)
5868                         return -EINVAL;
5869                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5870                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5871                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5872                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5873                         return -EINVAL;
5874                 if (key.idx > 4)
5875                         return -EINVAL;
5876         } else {
5877                 key.p.key_len = 0;
5878                 key.p.key = NULL;
5879         }
5880
5881         if (key.idx >= 0) {
5882                 int i;
5883                 bool ok = false;
5884                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5885                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5886                                 ok = true;
5887                                 break;
5888                         }
5889                 }
5890                 if (!ok)
5891                         return -EINVAL;
5892         }
5893
5894         if (!rdev->ops->auth)
5895                 return -EOPNOTSUPP;
5896
5897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5898             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5899                 return -EOPNOTSUPP;
5900
5901         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5902         chan = ieee80211_get_channel(&rdev->wiphy,
5903                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5904         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5905                 return -EINVAL;
5906
5907         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5908         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5909
5910         if (info->attrs[NL80211_ATTR_IE]) {
5911                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5912                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5913         }
5914
5915         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5916         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5917                 return -EINVAL;
5918
5919         if (auth_type == NL80211_AUTHTYPE_SAE &&
5920             !info->attrs[NL80211_ATTR_SAE_DATA])
5921                 return -EINVAL;
5922
5923         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5924                 if (auth_type != NL80211_AUTHTYPE_SAE)
5925                         return -EINVAL;
5926                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5927                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5928                 /* need to include at least Auth Transaction and Status Code */
5929                 if (sae_data_len < 4)
5930                         return -EINVAL;
5931         }
5932
5933         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5934
5935         /*
5936          * Since we no longer track auth state, ignore
5937          * requests to only change local state.
5938          */
5939         if (local_state_change)
5940                 return 0;
5941
5942         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5943                                   ssid, ssid_len, ie, ie_len,
5944                                   key.p.key, key.p.key_len, key.idx,
5945                                   sae_data, sae_data_len);
5946 }
5947
5948 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5949                                    struct genl_info *info,
5950                                    struct cfg80211_crypto_settings *settings,
5951                                    int cipher_limit)
5952 {
5953         memset(settings, 0, sizeof(*settings));
5954
5955         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5956
5957         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5958                 u16 proto;
5959                 proto = nla_get_u16(
5960                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5961                 settings->control_port_ethertype = cpu_to_be16(proto);
5962                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5963                     proto != ETH_P_PAE)
5964                         return -EINVAL;
5965                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5966                         settings->control_port_no_encrypt = true;
5967         } else
5968                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5969
5970         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5971                 void *data;
5972                 int len, i;
5973
5974                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5975                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5976                 settings->n_ciphers_pairwise = len / sizeof(u32);
5977
5978                 if (len % sizeof(u32))
5979                         return -EINVAL;
5980
5981                 if (settings->n_ciphers_pairwise > cipher_limit)
5982                         return -EINVAL;
5983
5984                 memcpy(settings->ciphers_pairwise, data, len);
5985
5986                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5987                         if (!cfg80211_supported_cipher_suite(
5988                                         &rdev->wiphy,
5989                                         settings->ciphers_pairwise[i]))
5990                                 return -EINVAL;
5991         }
5992
5993         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5994                 settings->cipher_group =
5995                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5996                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5997                                                      settings->cipher_group))
5998                         return -EINVAL;
5999         }
6000
6001         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6002                 settings->wpa_versions =
6003                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6004                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6005                         return -EINVAL;
6006         }
6007
6008         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6009                 void *data;
6010                 int len;
6011
6012                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6013                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6014                 settings->n_akm_suites = len / sizeof(u32);
6015
6016                 if (len % sizeof(u32))
6017                         return -EINVAL;
6018
6019                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6020                         return -EINVAL;
6021
6022                 memcpy(settings->akm_suites, data, len);
6023         }
6024
6025         return 0;
6026 }
6027
6028 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6029 {
6030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6031         struct net_device *dev = info->user_ptr[1];
6032         struct ieee80211_channel *chan;
6033         struct cfg80211_assoc_request req = {};
6034         const u8 *bssid, *ssid;
6035         int err, ssid_len = 0;
6036
6037         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6038                 return -EINVAL;
6039
6040         if (!info->attrs[NL80211_ATTR_MAC] ||
6041             !info->attrs[NL80211_ATTR_SSID] ||
6042             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6043                 return -EINVAL;
6044
6045         if (!rdev->ops->assoc)
6046                 return -EOPNOTSUPP;
6047
6048         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6049             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6050                 return -EOPNOTSUPP;
6051
6052         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6053
6054         chan = ieee80211_get_channel(&rdev->wiphy,
6055                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6056         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6057                 return -EINVAL;
6058
6059         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6060         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6061
6062         if (info->attrs[NL80211_ATTR_IE]) {
6063                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6064                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6065         }
6066
6067         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6068                 enum nl80211_mfp mfp =
6069                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6070                 if (mfp == NL80211_MFP_REQUIRED)
6071                         req.use_mfp = true;
6072                 else if (mfp != NL80211_MFP_NO)
6073                         return -EINVAL;
6074         }
6075
6076         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6077                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6078
6079         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6080                 req.flags |= ASSOC_REQ_DISABLE_HT;
6081
6082         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6083                 memcpy(&req.ht_capa_mask,
6084                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6085                        sizeof(req.ht_capa_mask));
6086
6087         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6088                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6089                         return -EINVAL;
6090                 memcpy(&req.ht_capa,
6091                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6092                        sizeof(req.ht_capa));
6093         }
6094
6095         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6096                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6097
6098         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6099                 memcpy(&req.vht_capa_mask,
6100                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6101                        sizeof(req.vht_capa_mask));
6102
6103         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6104                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6105                         return -EINVAL;
6106                 memcpy(&req.vht_capa,
6107                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6108                        sizeof(req.vht_capa));
6109         }
6110
6111         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6112         if (!err)
6113                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6114                                           ssid, ssid_len, &req);
6115
6116         return err;
6117 }
6118
6119 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6120 {
6121         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6122         struct net_device *dev = info->user_ptr[1];
6123         const u8 *ie = NULL, *bssid;
6124         int ie_len = 0;
6125         u16 reason_code;
6126         bool local_state_change;
6127
6128         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6129                 return -EINVAL;
6130
6131         if (!info->attrs[NL80211_ATTR_MAC])
6132                 return -EINVAL;
6133
6134         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6135                 return -EINVAL;
6136
6137         if (!rdev->ops->deauth)
6138                 return -EOPNOTSUPP;
6139
6140         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6141             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6142                 return -EOPNOTSUPP;
6143
6144         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6145
6146         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6147         if (reason_code == 0) {
6148                 /* Reason Code 0 is reserved */
6149                 return -EINVAL;
6150         }
6151
6152         if (info->attrs[NL80211_ATTR_IE]) {
6153                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6154                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6155         }
6156
6157         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6158
6159         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6160                                     local_state_change);
6161 }
6162
6163 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6164 {
6165         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6166         struct net_device *dev = info->user_ptr[1];
6167         const u8 *ie = NULL, *bssid;
6168         int ie_len = 0;
6169         u16 reason_code;
6170         bool local_state_change;
6171
6172         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6173                 return -EINVAL;
6174
6175         if (!info->attrs[NL80211_ATTR_MAC])
6176                 return -EINVAL;
6177
6178         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6179                 return -EINVAL;
6180
6181         if (!rdev->ops->disassoc)
6182                 return -EOPNOTSUPP;
6183
6184         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6185             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6186                 return -EOPNOTSUPP;
6187
6188         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6189
6190         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6191         if (reason_code == 0) {
6192                 /* Reason Code 0 is reserved */
6193                 return -EINVAL;
6194         }
6195
6196         if (info->attrs[NL80211_ATTR_IE]) {
6197                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6198                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6199         }
6200
6201         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6202
6203         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6204                                       local_state_change);
6205 }
6206
6207 static bool
6208 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6209                          int mcast_rate[IEEE80211_NUM_BANDS],
6210                          int rateval)
6211 {
6212         struct wiphy *wiphy = &rdev->wiphy;
6213         bool found = false;
6214         int band, i;
6215
6216         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6217                 struct ieee80211_supported_band *sband;
6218
6219                 sband = wiphy->bands[band];
6220                 if (!sband)
6221                         continue;
6222
6223                 for (i = 0; i < sband->n_bitrates; i++) {
6224                         if (sband->bitrates[i].bitrate == rateval) {
6225                                 mcast_rate[band] = i + 1;
6226                                 found = true;
6227                                 break;
6228                         }
6229                 }
6230         }
6231
6232         return found;
6233 }
6234
6235 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6236 {
6237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6238         struct net_device *dev = info->user_ptr[1];
6239         struct cfg80211_ibss_params ibss;
6240         struct wiphy *wiphy;
6241         struct cfg80211_cached_keys *connkeys = NULL;
6242         int err;
6243
6244         memset(&ibss, 0, sizeof(ibss));
6245
6246         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6247                 return -EINVAL;
6248
6249         if (!info->attrs[NL80211_ATTR_SSID] ||
6250             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6251                 return -EINVAL;
6252
6253         ibss.beacon_interval = 100;
6254
6255         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6256                 ibss.beacon_interval =
6257                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6258                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6259                         return -EINVAL;
6260         }
6261
6262         if (!rdev->ops->join_ibss)
6263                 return -EOPNOTSUPP;
6264
6265         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6266                 return -EOPNOTSUPP;
6267
6268         wiphy = &rdev->wiphy;
6269
6270         if (info->attrs[NL80211_ATTR_MAC]) {
6271                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6272
6273                 if (!is_valid_ether_addr(ibss.bssid))
6274                         return -EINVAL;
6275         }
6276         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6277         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6278
6279         if (info->attrs[NL80211_ATTR_IE]) {
6280                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6281                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6282         }
6283
6284         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6285         if (err)
6286                 return err;
6287
6288         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6289                 return -EINVAL;
6290
6291         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6292                 return -EINVAL;
6293         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6294             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6295                 return -EINVAL;
6296
6297         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6298         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6299
6300         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6301                 u8 *rates =
6302                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6303                 int n_rates =
6304                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6305                 struct ieee80211_supported_band *sband =
6306                         wiphy->bands[ibss.chandef.chan->band];
6307
6308                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6309                                              &ibss.basic_rates);
6310                 if (err)
6311                         return err;
6312         }
6313
6314         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6315             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6316                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6317                 return -EINVAL;
6318
6319         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6320                 bool no_ht = false;
6321
6322                 connkeys = nl80211_parse_connkeys(rdev,
6323                                           info->attrs[NL80211_ATTR_KEYS],
6324                                           &no_ht);
6325                 if (IS_ERR(connkeys))
6326                         return PTR_ERR(connkeys);
6327
6328                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6329                     no_ht) {
6330                         kfree(connkeys);
6331                         return -EINVAL;
6332                 }
6333         }
6334
6335         ibss.control_port =
6336                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6337
6338         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6339         if (err)
6340                 kfree(connkeys);
6341         return err;
6342 }
6343
6344 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6345 {
6346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6347         struct net_device *dev = info->user_ptr[1];
6348
6349         if (!rdev->ops->leave_ibss)
6350                 return -EOPNOTSUPP;
6351
6352         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6353                 return -EOPNOTSUPP;
6354
6355         return cfg80211_leave_ibss(rdev, dev, false);
6356 }
6357
6358 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6359 {
6360         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6361         struct net_device *dev = info->user_ptr[1];
6362         int mcast_rate[IEEE80211_NUM_BANDS];
6363         u32 nla_rate;
6364         int err;
6365
6366         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6367             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6368                 return -EOPNOTSUPP;
6369
6370         if (!rdev->ops->set_mcast_rate)
6371                 return -EOPNOTSUPP;
6372
6373         memset(mcast_rate, 0, sizeof(mcast_rate));
6374
6375         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6376                 return -EINVAL;
6377
6378         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6379         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6380                 return -EINVAL;
6381
6382         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6383
6384         return err;
6385 }
6386
6387
6388 #ifdef CONFIG_NL80211_TESTMODE
6389 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6390         .name = "testmode",
6391 };
6392
6393 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6394 {
6395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6396         int err;
6397
6398         if (!info->attrs[NL80211_ATTR_TESTDATA])
6399                 return -EINVAL;
6400
6401         err = -EOPNOTSUPP;
6402         if (rdev->ops->testmode_cmd) {
6403                 rdev->testmode_info = info;
6404                 err = rdev_testmode_cmd(rdev,
6405                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6406                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6407                 rdev->testmode_info = NULL;
6408         }
6409
6410         return err;
6411 }
6412
6413 static int nl80211_testmode_dump(struct sk_buff *skb,
6414                                  struct netlink_callback *cb)
6415 {
6416         struct cfg80211_registered_device *rdev;
6417         int err;
6418         long phy_idx;
6419         void *data = NULL;
6420         int data_len = 0;
6421
6422         if (cb->args[0]) {
6423                 /*
6424                  * 0 is a valid index, but not valid for args[0],
6425                  * so we need to offset by 1.
6426                  */
6427                 phy_idx = cb->args[0] - 1;
6428         } else {
6429                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6430                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6431                                   nl80211_policy);
6432                 if (err)
6433                         return err;
6434
6435                 mutex_lock(&cfg80211_mutex);
6436                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6437                                                   nl80211_fam.attrbuf);
6438                 if (IS_ERR(rdev)) {
6439                         mutex_unlock(&cfg80211_mutex);
6440                         return PTR_ERR(rdev);
6441                 }
6442                 phy_idx = rdev->wiphy_idx;
6443                 rdev = NULL;
6444                 mutex_unlock(&cfg80211_mutex);
6445
6446                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6447                         cb->args[1] =
6448                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6449         }
6450
6451         if (cb->args[1]) {
6452                 data = nla_data((void *)cb->args[1]);
6453                 data_len = nla_len((void *)cb->args[1]);
6454         }
6455
6456         mutex_lock(&cfg80211_mutex);
6457         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6458         if (!rdev) {
6459                 mutex_unlock(&cfg80211_mutex);
6460                 return -ENOENT;
6461         }
6462         cfg80211_lock_rdev(rdev);
6463         mutex_unlock(&cfg80211_mutex);
6464
6465         if (!rdev->ops->testmode_dump) {
6466                 err = -EOPNOTSUPP;
6467                 goto out_err;
6468         }
6469
6470         while (1) {
6471                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6472                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6473                                            NL80211_CMD_TESTMODE);
6474                 struct nlattr *tmdata;
6475
6476                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6477                         genlmsg_cancel(skb, hdr);
6478                         break;
6479                 }
6480
6481                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6482                 if (!tmdata) {
6483                         genlmsg_cancel(skb, hdr);
6484                         break;
6485                 }
6486                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6487                 nla_nest_end(skb, tmdata);
6488
6489                 if (err == -ENOBUFS || err == -ENOENT) {
6490                         genlmsg_cancel(skb, hdr);
6491                         break;
6492                 } else if (err) {
6493                         genlmsg_cancel(skb, hdr);
6494                         goto out_err;
6495                 }
6496
6497                 genlmsg_end(skb, hdr);
6498         }
6499
6500         err = skb->len;
6501         /* see above */
6502         cb->args[0] = phy_idx + 1;
6503  out_err:
6504         cfg80211_unlock_rdev(rdev);
6505         return err;
6506 }
6507
6508 static struct sk_buff *
6509 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6510                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6511 {
6512         struct sk_buff *skb;
6513         void *hdr;
6514         struct nlattr *data;
6515
6516         skb = nlmsg_new(approxlen + 100, gfp);
6517         if (!skb)
6518                 return NULL;
6519
6520         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6521         if (!hdr) {
6522                 kfree_skb(skb);
6523                 return NULL;
6524         }
6525
6526         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6527                 goto nla_put_failure;
6528         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6529
6530         ((void **)skb->cb)[0] = rdev;
6531         ((void **)skb->cb)[1] = hdr;
6532         ((void **)skb->cb)[2] = data;
6533
6534         return skb;
6535
6536  nla_put_failure:
6537         kfree_skb(skb);
6538         return NULL;
6539 }
6540
6541 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6542                                                   int approxlen)
6543 {
6544         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6545
6546         if (WARN_ON(!rdev->testmode_info))
6547                 return NULL;
6548
6549         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6550                                 rdev->testmode_info->snd_portid,
6551                                 rdev->testmode_info->snd_seq,
6552                                 GFP_KERNEL);
6553 }
6554 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6555
6556 int cfg80211_testmode_reply(struct sk_buff *skb)
6557 {
6558         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6559         void *hdr = ((void **)skb->cb)[1];
6560         struct nlattr *data = ((void **)skb->cb)[2];
6561
6562         if (WARN_ON(!rdev->testmode_info)) {
6563                 kfree_skb(skb);
6564                 return -EINVAL;
6565         }
6566
6567         nla_nest_end(skb, data);
6568         genlmsg_end(skb, hdr);
6569         return genlmsg_reply(skb, rdev->testmode_info);
6570 }
6571 EXPORT_SYMBOL(cfg80211_testmode_reply);
6572
6573 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6574                                                   int approxlen, gfp_t gfp)
6575 {
6576         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6577
6578         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6579 }
6580 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6581
6582 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6583 {
6584         void *hdr = ((void **)skb->cb)[1];
6585         struct nlattr *data = ((void **)skb->cb)[2];
6586
6587         nla_nest_end(skb, data);
6588         genlmsg_end(skb, hdr);
6589         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6590 }
6591 EXPORT_SYMBOL(cfg80211_testmode_event);
6592 #endif
6593
6594 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6595 {
6596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6597         struct net_device *dev = info->user_ptr[1];
6598         struct cfg80211_connect_params connect;
6599         struct wiphy *wiphy;
6600         struct cfg80211_cached_keys *connkeys = NULL;
6601         int err;
6602
6603         memset(&connect, 0, sizeof(connect));
6604
6605         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6606                 return -EINVAL;
6607
6608         if (!info->attrs[NL80211_ATTR_SSID] ||
6609             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6610                 return -EINVAL;
6611
6612         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6613                 connect.auth_type =
6614                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6615                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6616                                              NL80211_CMD_CONNECT))
6617                         return -EINVAL;
6618         } else
6619                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6620
6621         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6622
6623         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6624                                       NL80211_MAX_NR_CIPHER_SUITES);
6625         if (err)
6626                 return err;
6627
6628         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6629             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6630                 return -EOPNOTSUPP;
6631
6632         wiphy = &rdev->wiphy;
6633
6634         connect.bg_scan_period = -1;
6635         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6636                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6637                 connect.bg_scan_period =
6638                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6639         }
6640
6641         if (info->attrs[NL80211_ATTR_MAC])
6642                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6643         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6644         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6645
6646         if (info->attrs[NL80211_ATTR_IE]) {
6647                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6648                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6649         }
6650
6651         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6652                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6653                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6654                     connect.mfp != NL80211_MFP_NO)
6655                         return -EINVAL;
6656         } else {
6657                 connect.mfp = NL80211_MFP_NO;
6658         }
6659
6660         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6661                 connect.channel =
6662                         ieee80211_get_channel(wiphy,
6663                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6664                 if (!connect.channel ||
6665                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6666                         return -EINVAL;
6667         }
6668
6669         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6670                 connkeys = nl80211_parse_connkeys(rdev,
6671                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6672                 if (IS_ERR(connkeys))
6673                         return PTR_ERR(connkeys);
6674         }
6675
6676         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6677                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6678
6679         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6680                 memcpy(&connect.ht_capa_mask,
6681                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6682                        sizeof(connect.ht_capa_mask));
6683
6684         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6685                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6686                         kfree(connkeys);
6687                         return -EINVAL;
6688                 }
6689                 memcpy(&connect.ht_capa,
6690                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6691                        sizeof(connect.ht_capa));
6692         }
6693
6694         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6695                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6696
6697         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6698                 memcpy(&connect.vht_capa_mask,
6699                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6700                        sizeof(connect.vht_capa_mask));
6701
6702         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6703                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6704                         kfree(connkeys);
6705                         return -EINVAL;
6706                 }
6707                 memcpy(&connect.vht_capa,
6708                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6709                        sizeof(connect.vht_capa));
6710         }
6711
6712         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6713         if (err)
6714                 kfree(connkeys);
6715         return err;
6716 }
6717
6718 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6719 {
6720         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6721         struct net_device *dev = info->user_ptr[1];
6722         u16 reason;
6723
6724         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6725                 reason = WLAN_REASON_DEAUTH_LEAVING;
6726         else
6727                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6728
6729         if (reason == 0)
6730                 return -EINVAL;
6731
6732         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6733             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6734                 return -EOPNOTSUPP;
6735
6736         return cfg80211_disconnect(rdev, dev, reason, true);
6737 }
6738
6739 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6740 {
6741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6742         struct net *net;
6743         int err;
6744         u32 pid;
6745
6746         if (!info->attrs[NL80211_ATTR_PID])
6747                 return -EINVAL;
6748
6749         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6750
6751         net = get_net_ns_by_pid(pid);
6752         if (IS_ERR(net))
6753                 return PTR_ERR(net);
6754
6755         err = 0;
6756
6757         /* check if anything to do */
6758         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6759                 err = cfg80211_switch_netns(rdev, net);
6760
6761         put_net(net);
6762         return err;
6763 }
6764
6765 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6766 {
6767         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6768         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6769                         struct cfg80211_pmksa *pmksa) = NULL;
6770         struct net_device *dev = info->user_ptr[1];
6771         struct cfg80211_pmksa pmksa;
6772
6773         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6774
6775         if (!info->attrs[NL80211_ATTR_MAC])
6776                 return -EINVAL;
6777
6778         if (!info->attrs[NL80211_ATTR_PMKID])
6779                 return -EINVAL;
6780
6781         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6782         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6783
6784         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6785             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6786                 return -EOPNOTSUPP;
6787
6788         switch (info->genlhdr->cmd) {
6789         case NL80211_CMD_SET_PMKSA:
6790                 rdev_ops = rdev->ops->set_pmksa;
6791                 break;
6792         case NL80211_CMD_DEL_PMKSA:
6793                 rdev_ops = rdev->ops->del_pmksa;
6794                 break;
6795         default:
6796                 WARN_ON(1);
6797                 break;
6798         }
6799
6800         if (!rdev_ops)
6801                 return -EOPNOTSUPP;
6802
6803         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6804 }
6805
6806 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6807 {
6808         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6809         struct net_device *dev = info->user_ptr[1];
6810
6811         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6812             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6813                 return -EOPNOTSUPP;
6814
6815         if (!rdev->ops->flush_pmksa)
6816                 return -EOPNOTSUPP;
6817
6818         return rdev_flush_pmksa(rdev, dev);
6819 }
6820
6821 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6822 {
6823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6824         struct net_device *dev = info->user_ptr[1];
6825         u8 action_code, dialog_token;
6826         u16 status_code;
6827         u8 *peer;
6828
6829         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6830             !rdev->ops->tdls_mgmt)
6831                 return -EOPNOTSUPP;
6832
6833         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6834             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6835             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6836             !info->attrs[NL80211_ATTR_IE] ||
6837             !info->attrs[NL80211_ATTR_MAC])
6838                 return -EINVAL;
6839
6840         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6841         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6842         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6843         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6844
6845         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6846                               dialog_token, status_code,
6847                               nla_data(info->attrs[NL80211_ATTR_IE]),
6848                               nla_len(info->attrs[NL80211_ATTR_IE]));
6849 }
6850
6851 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6852 {
6853         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6854         struct net_device *dev = info->user_ptr[1];
6855         enum nl80211_tdls_operation operation;
6856         u8 *peer;
6857
6858         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6859             !rdev->ops->tdls_oper)
6860                 return -EOPNOTSUPP;
6861
6862         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6863             !info->attrs[NL80211_ATTR_MAC])
6864                 return -EINVAL;
6865
6866         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6867         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6868
6869         return rdev_tdls_oper(rdev, dev, peer, operation);
6870 }
6871
6872 static int nl80211_remain_on_channel(struct sk_buff *skb,
6873                                      struct genl_info *info)
6874 {
6875         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6876         struct wireless_dev *wdev = info->user_ptr[1];
6877         struct cfg80211_chan_def chandef;
6878         struct sk_buff *msg;
6879         void *hdr;
6880         u64 cookie;
6881         u32 duration;
6882         int err;
6883
6884         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6885             !info->attrs[NL80211_ATTR_DURATION])
6886                 return -EINVAL;
6887
6888         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6889
6890         if (!rdev->ops->remain_on_channel ||
6891             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6892                 return -EOPNOTSUPP;
6893
6894         /*
6895          * We should be on that channel for at least a minimum amount of
6896          * time (10ms) but no longer than the driver supports.
6897          */
6898         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6899             duration > rdev->wiphy.max_remain_on_channel_duration)
6900                 return -EINVAL;
6901
6902         err = nl80211_parse_chandef(rdev, info, &chandef);
6903         if (err)
6904                 return err;
6905
6906         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6907         if (!msg)
6908                 return -ENOMEM;
6909
6910         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6911                              NL80211_CMD_REMAIN_ON_CHANNEL);
6912
6913         if (IS_ERR(hdr)) {
6914                 err = PTR_ERR(hdr);
6915                 goto free_msg;
6916         }
6917
6918         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6919                                      duration, &cookie);
6920
6921         if (err)
6922                 goto free_msg;
6923
6924         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6925                 goto nla_put_failure;
6926
6927         genlmsg_end(msg, hdr);
6928
6929         return genlmsg_reply(msg, info);
6930
6931  nla_put_failure:
6932         err = -ENOBUFS;
6933  free_msg:
6934         nlmsg_free(msg);
6935         return err;
6936 }
6937
6938 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6939                                             struct genl_info *info)
6940 {
6941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6942         struct wireless_dev *wdev = info->user_ptr[1];
6943         u64 cookie;
6944
6945         if (!info->attrs[NL80211_ATTR_COOKIE])
6946                 return -EINVAL;
6947
6948         if (!rdev->ops->cancel_remain_on_channel)
6949                 return -EOPNOTSUPP;
6950
6951         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6952
6953         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6954 }
6955
6956 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6957                            u8 *rates, u8 rates_len)
6958 {
6959         u8 i;
6960         u32 mask = 0;
6961
6962         for (i = 0; i < rates_len; i++) {
6963                 int rate = (rates[i] & 0x7f) * 5;
6964                 int ridx;
6965                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6966                         struct ieee80211_rate *srate =
6967                                 &sband->bitrates[ridx];
6968                         if (rate == srate->bitrate) {
6969                                 mask |= 1 << ridx;
6970                                 break;
6971                         }
6972                 }
6973                 if (ridx == sband->n_bitrates)
6974                         return 0; /* rate not found */
6975         }
6976
6977         return mask;
6978 }
6979
6980 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6981                                u8 *rates, u8 rates_len,
6982                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6983 {
6984         u8 i;
6985
6986         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6987
6988         for (i = 0; i < rates_len; i++) {
6989                 int ridx, rbit;
6990
6991                 ridx = rates[i] / 8;
6992                 rbit = BIT(rates[i] % 8);
6993
6994                 /* check validity */
6995                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6996                         return false;
6997
6998                 /* check availability */
6999                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7000                         mcs[ridx] |= rbit;
7001                 else
7002                         return false;
7003         }
7004
7005         return true;
7006 }
7007
7008 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7009         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7010                                     .len = NL80211_MAX_SUPP_RATES },
7011         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7012                                  .len = NL80211_MAX_SUPP_HT_RATES },
7013 };
7014
7015 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7016                                        struct genl_info *info)
7017 {
7018         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7020         struct cfg80211_bitrate_mask mask;
7021         int rem, i;
7022         struct net_device *dev = info->user_ptr[1];
7023         struct nlattr *tx_rates;
7024         struct ieee80211_supported_band *sband;
7025
7026         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7027                 return -EINVAL;
7028
7029         if (!rdev->ops->set_bitrate_mask)
7030                 return -EOPNOTSUPP;
7031
7032         memset(&mask, 0, sizeof(mask));
7033         /* Default to all rates enabled */
7034         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7035                 sband = rdev->wiphy.bands[i];
7036                 mask.control[i].legacy =
7037                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7038                 if (sband)
7039                         memcpy(mask.control[i].mcs,
7040                                sband->ht_cap.mcs.rx_mask,
7041                                sizeof(mask.control[i].mcs));
7042                 else
7043                         memset(mask.control[i].mcs, 0,
7044                                sizeof(mask.control[i].mcs));
7045         }
7046
7047         /*
7048          * The nested attribute uses enum nl80211_band as the index. This maps
7049          * directly to the enum ieee80211_band values used in cfg80211.
7050          */
7051         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7052         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7053         {
7054                 enum ieee80211_band band = nla_type(tx_rates);
7055                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7056                         return -EINVAL;
7057                 sband = rdev->wiphy.bands[band];
7058                 if (sband == NULL)
7059                         return -EINVAL;
7060                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7061                           nla_len(tx_rates), nl80211_txattr_policy);
7062                 if (tb[NL80211_TXRATE_LEGACY]) {
7063                         mask.control[band].legacy = rateset_to_mask(
7064                                 sband,
7065                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7066                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7067                         if ((mask.control[band].legacy == 0) &&
7068                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7069                                 return -EINVAL;
7070                 }
7071                 if (tb[NL80211_TXRATE_MCS]) {
7072                         if (!ht_rateset_to_mask(
7073                                         sband,
7074                                         nla_data(tb[NL80211_TXRATE_MCS]),
7075                                         nla_len(tb[NL80211_TXRATE_MCS]),
7076                                         mask.control[band].mcs))
7077                                 return -EINVAL;
7078                 }
7079
7080                 if (mask.control[band].legacy == 0) {
7081                         /* don't allow empty legacy rates if HT
7082                          * is not even supported. */
7083                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7084                                 return -EINVAL;
7085
7086                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7087                                 if (mask.control[band].mcs[i])
7088                                         break;
7089
7090                         /* legacy and mcs rates may not be both empty */
7091                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7092                                 return -EINVAL;
7093                 }
7094         }
7095
7096         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7097 }
7098
7099 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7100 {
7101         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7102         struct wireless_dev *wdev = info->user_ptr[1];
7103         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7104
7105         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7106                 return -EINVAL;
7107
7108         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7109                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7110
7111         switch (wdev->iftype) {
7112         case NL80211_IFTYPE_STATION:
7113         case NL80211_IFTYPE_ADHOC:
7114         case NL80211_IFTYPE_P2P_CLIENT:
7115         case NL80211_IFTYPE_AP:
7116         case NL80211_IFTYPE_AP_VLAN:
7117         case NL80211_IFTYPE_MESH_POINT:
7118         case NL80211_IFTYPE_P2P_GO:
7119         case NL80211_IFTYPE_P2P_DEVICE:
7120                 break;
7121         default:
7122                 return -EOPNOTSUPP;
7123         }
7124
7125         /* not much point in registering if we can't reply */
7126         if (!rdev->ops->mgmt_tx)
7127                 return -EOPNOTSUPP;
7128
7129         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7130                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7131                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7132 }
7133
7134 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7135 {
7136         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7137         struct wireless_dev *wdev = info->user_ptr[1];
7138         struct cfg80211_chan_def chandef;
7139         int err;
7140         void *hdr = NULL;
7141         u64 cookie;
7142         struct sk_buff *msg = NULL;
7143         unsigned int wait = 0;
7144         bool offchan, no_cck, dont_wait_for_ack;
7145
7146         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7147
7148         if (!info->attrs[NL80211_ATTR_FRAME])
7149                 return -EINVAL;
7150
7151         if (!rdev->ops->mgmt_tx)
7152                 return -EOPNOTSUPP;
7153
7154         switch (wdev->iftype) {
7155         case NL80211_IFTYPE_STATION:
7156         case NL80211_IFTYPE_ADHOC:
7157         case NL80211_IFTYPE_P2P_CLIENT:
7158         case NL80211_IFTYPE_AP:
7159         case NL80211_IFTYPE_AP_VLAN:
7160         case NL80211_IFTYPE_MESH_POINT:
7161         case NL80211_IFTYPE_P2P_GO:
7162         case NL80211_IFTYPE_P2P_DEVICE:
7163                 break;
7164         default:
7165                 return -EOPNOTSUPP;
7166         }
7167
7168         if (info->attrs[NL80211_ATTR_DURATION]) {
7169                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7170                         return -EINVAL;
7171                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7172
7173                 /*
7174                  * We should wait on the channel for at least a minimum amount
7175                  * of time (10ms) but no longer than the driver supports.
7176                  */
7177                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7178                     wait > rdev->wiphy.max_remain_on_channel_duration)
7179                         return -EINVAL;
7180
7181         }
7182
7183         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7184
7185         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7186                 return -EINVAL;
7187
7188         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7189
7190         err = nl80211_parse_chandef(rdev, info, &chandef);
7191         if (err)
7192                 return err;
7193
7194         if (!dont_wait_for_ack) {
7195                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7196                 if (!msg)
7197                         return -ENOMEM;
7198
7199                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7200                                      NL80211_CMD_FRAME);
7201
7202                 if (IS_ERR(hdr)) {
7203                         err = PTR_ERR(hdr);
7204                         goto free_msg;
7205                 }
7206         }
7207
7208         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7209                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7210                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7211                                     no_cck, dont_wait_for_ack, &cookie);
7212         if (err)
7213                 goto free_msg;
7214
7215         if (msg) {
7216                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7217                         goto nla_put_failure;
7218
7219                 genlmsg_end(msg, hdr);
7220                 return genlmsg_reply(msg, info);
7221         }
7222
7223         return 0;
7224
7225  nla_put_failure:
7226         err = -ENOBUFS;
7227  free_msg:
7228         nlmsg_free(msg);
7229         return err;
7230 }
7231
7232 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7233 {
7234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7235         struct wireless_dev *wdev = info->user_ptr[1];
7236         u64 cookie;
7237
7238         if (!info->attrs[NL80211_ATTR_COOKIE])
7239                 return -EINVAL;
7240
7241         if (!rdev->ops->mgmt_tx_cancel_wait)
7242                 return -EOPNOTSUPP;
7243
7244         switch (wdev->iftype) {
7245         case NL80211_IFTYPE_STATION:
7246         case NL80211_IFTYPE_ADHOC:
7247         case NL80211_IFTYPE_P2P_CLIENT:
7248         case NL80211_IFTYPE_AP:
7249         case NL80211_IFTYPE_AP_VLAN:
7250         case NL80211_IFTYPE_P2P_GO:
7251         case NL80211_IFTYPE_P2P_DEVICE:
7252                 break;
7253         default:
7254                 return -EOPNOTSUPP;
7255         }
7256
7257         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7258
7259         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7260 }
7261
7262 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7263 {
7264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7265         struct wireless_dev *wdev;
7266         struct net_device *dev = info->user_ptr[1];
7267         u8 ps_state;
7268         bool state;
7269         int err;
7270
7271         if (!info->attrs[NL80211_ATTR_PS_STATE])
7272                 return -EINVAL;
7273
7274         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7275
7276         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7277                 return -EINVAL;
7278
7279         wdev = dev->ieee80211_ptr;
7280
7281         if (!rdev->ops->set_power_mgmt)
7282                 return -EOPNOTSUPP;
7283
7284         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7285
7286         if (state == wdev->ps)
7287                 return 0;
7288
7289         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7290         if (!err)
7291                 wdev->ps = state;
7292         return err;
7293 }
7294
7295 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7296 {
7297         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7298         enum nl80211_ps_state ps_state;
7299         struct wireless_dev *wdev;
7300         struct net_device *dev = info->user_ptr[1];
7301         struct sk_buff *msg;
7302         void *hdr;
7303         int err;
7304
7305         wdev = dev->ieee80211_ptr;
7306
7307         if (!rdev->ops->set_power_mgmt)
7308                 return -EOPNOTSUPP;
7309
7310         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7311         if (!msg)
7312                 return -ENOMEM;
7313
7314         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7315                              NL80211_CMD_GET_POWER_SAVE);
7316         if (!hdr) {
7317                 err = -ENOBUFS;
7318                 goto free_msg;
7319         }
7320
7321         if (wdev->ps)
7322                 ps_state = NL80211_PS_ENABLED;
7323         else
7324                 ps_state = NL80211_PS_DISABLED;
7325
7326         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7327                 goto nla_put_failure;
7328
7329         genlmsg_end(msg, hdr);
7330         return genlmsg_reply(msg, info);
7331
7332  nla_put_failure:
7333         err = -ENOBUFS;
7334  free_msg:
7335         nlmsg_free(msg);
7336         return err;
7337 }
7338
7339 static struct nla_policy
7340 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7341         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7342         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7343         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7344         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7345         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7346         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7347 };
7348
7349 static int nl80211_set_cqm_txe(struct genl_info *info,
7350                                u32 rate, u32 pkts, u32 intvl)
7351 {
7352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7353         struct wireless_dev *wdev;
7354         struct net_device *dev = info->user_ptr[1];
7355
7356         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7357                 return -EINVAL;
7358
7359         wdev = dev->ieee80211_ptr;
7360
7361         if (!rdev->ops->set_cqm_txe_config)
7362                 return -EOPNOTSUPP;
7363
7364         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7365             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7366                 return -EOPNOTSUPP;
7367
7368         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7369 }
7370
7371 static int nl80211_set_cqm_rssi(struct genl_info *info,
7372                                 s32 threshold, u32 hysteresis)
7373 {
7374         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7375         struct wireless_dev *wdev;
7376         struct net_device *dev = info->user_ptr[1];
7377
7378         if (threshold > 0)
7379                 return -EINVAL;
7380
7381         wdev = dev->ieee80211_ptr;
7382
7383         if (!rdev->ops->set_cqm_rssi_config)
7384                 return -EOPNOTSUPP;
7385
7386         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7387             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7388                 return -EOPNOTSUPP;
7389
7390         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7391 }
7392
7393 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7394 {
7395         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7396         struct nlattr *cqm;
7397         int err;
7398
7399         cqm = info->attrs[NL80211_ATTR_CQM];
7400         if (!cqm) {
7401                 err = -EINVAL;
7402                 goto out;
7403         }
7404
7405         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7406                                nl80211_attr_cqm_policy);
7407         if (err)
7408                 goto out;
7409
7410         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7411             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7412                 s32 threshold;
7413                 u32 hysteresis;
7414                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7415                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7416                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7417         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7418                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7419                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7420                 u32 rate, pkts, intvl;
7421                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7422                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7423                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7424                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7425         } else
7426                 err = -EINVAL;
7427
7428 out:
7429         return err;
7430 }
7431
7432 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7433 {
7434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7435         struct net_device *dev = info->user_ptr[1];
7436         struct mesh_config cfg;
7437         struct mesh_setup setup;
7438         int err;
7439
7440         /* start with default */
7441         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7442         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7443
7444         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7445                 /* and parse parameters if given */
7446                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7447                 if (err)
7448                         return err;
7449         }
7450
7451         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7452             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7453                 return -EINVAL;
7454
7455         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7456         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7457
7458         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7459             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7460                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7461                         return -EINVAL;
7462
7463         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7464                 setup.beacon_interval =
7465                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7466                 if (setup.beacon_interval < 10 ||
7467                     setup.beacon_interval > 10000)
7468                         return -EINVAL;
7469         }
7470
7471         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7472                 setup.dtim_period =
7473                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7474                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7475                         return -EINVAL;
7476         }
7477
7478         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7479                 /* parse additional setup parameters if given */
7480                 err = nl80211_parse_mesh_setup(info, &setup);
7481                 if (err)
7482                         return err;
7483         }
7484
7485         if (setup.user_mpm)
7486                 cfg.auto_open_plinks = false;
7487
7488         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7489                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7490                 if (err)
7491                         return err;
7492         } else {
7493                 /* cfg80211_join_mesh() will sort it out */
7494                 setup.chandef.chan = NULL;
7495         }
7496
7497         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7498 }
7499
7500 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7501 {
7502         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7503         struct net_device *dev = info->user_ptr[1];
7504
7505         return cfg80211_leave_mesh(rdev, dev);
7506 }
7507
7508 #ifdef CONFIG_PM
7509 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7510                                         struct cfg80211_registered_device *rdev)
7511 {
7512         struct nlattr *nl_pats, *nl_pat;
7513         int i, pat_len;
7514
7515         if (!rdev->wowlan->n_patterns)
7516                 return 0;
7517
7518         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7519         if (!nl_pats)
7520                 return -ENOBUFS;
7521
7522         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7523                 nl_pat = nla_nest_start(msg, i + 1);
7524                 if (!nl_pat)
7525                         return -ENOBUFS;
7526                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7527                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7528                             DIV_ROUND_UP(pat_len, 8),
7529                             rdev->wowlan->patterns[i].mask) ||
7530                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7531                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7532                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7533                                 rdev->wowlan->patterns[i].pkt_offset))
7534                         return -ENOBUFS;
7535                 nla_nest_end(msg, nl_pat);
7536         }
7537         nla_nest_end(msg, nl_pats);
7538
7539         return 0;
7540 }
7541
7542 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7543                                    struct cfg80211_wowlan_tcp *tcp)
7544 {
7545         struct nlattr *nl_tcp;
7546
7547         if (!tcp)
7548                 return 0;
7549
7550         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7551         if (!nl_tcp)
7552                 return -ENOBUFS;
7553
7554         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7555             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7556             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7557             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7558             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7559             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7560                     tcp->payload_len, tcp->payload) ||
7561             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7562                         tcp->data_interval) ||
7563             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7564                     tcp->wake_len, tcp->wake_data) ||
7565             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7566                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7567                 return -ENOBUFS;
7568
7569         if (tcp->payload_seq.len &&
7570             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7571                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7572                 return -ENOBUFS;
7573
7574         if (tcp->payload_tok.len &&
7575             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7576                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7577                     &tcp->payload_tok))
7578                 return -ENOBUFS;
7579
7580         nla_nest_end(msg, nl_tcp);
7581
7582         return 0;
7583 }
7584
7585 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7586 {
7587         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7588         struct sk_buff *msg;
7589         void *hdr;
7590         u32 size = NLMSG_DEFAULT_SIZE;
7591
7592         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7593             !rdev->wiphy.wowlan.tcp)
7594                 return -EOPNOTSUPP;
7595
7596         if (rdev->wowlan && rdev->wowlan->tcp) {
7597                 /* adjust size to have room for all the data */
7598                 size += rdev->wowlan->tcp->tokens_size +
7599                         rdev->wowlan->tcp->payload_len +
7600                         rdev->wowlan->tcp->wake_len +
7601                         rdev->wowlan->tcp->wake_len / 8;
7602         }
7603
7604         msg = nlmsg_new(size, GFP_KERNEL);
7605         if (!msg)
7606                 return -ENOMEM;
7607
7608         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7609                              NL80211_CMD_GET_WOWLAN);
7610         if (!hdr)
7611                 goto nla_put_failure;
7612
7613         if (rdev->wowlan) {
7614                 struct nlattr *nl_wowlan;
7615
7616                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7617                 if (!nl_wowlan)
7618                         goto nla_put_failure;
7619
7620                 if ((rdev->wowlan->any &&
7621                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7622                     (rdev->wowlan->disconnect &&
7623                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7624                     (rdev->wowlan->magic_pkt &&
7625                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7626                     (rdev->wowlan->gtk_rekey_failure &&
7627                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7628                     (rdev->wowlan->eap_identity_req &&
7629                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7630                     (rdev->wowlan->four_way_handshake &&
7631                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7632                     (rdev->wowlan->rfkill_release &&
7633                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7634                         goto nla_put_failure;
7635
7636                 if (nl80211_send_wowlan_patterns(msg, rdev))
7637                         goto nla_put_failure;
7638
7639                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7640                         goto nla_put_failure;
7641
7642                 nla_nest_end(msg, nl_wowlan);
7643         }
7644
7645         genlmsg_end(msg, hdr);
7646         return genlmsg_reply(msg, info);
7647
7648 nla_put_failure:
7649         nlmsg_free(msg);
7650         return -ENOBUFS;
7651 }
7652
7653 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7654                                     struct nlattr *attr,
7655                                     struct cfg80211_wowlan *trig)
7656 {
7657         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7658         struct cfg80211_wowlan_tcp *cfg;
7659         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7660         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7661         u32 size;
7662         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7663         int err, port;
7664
7665         if (!rdev->wiphy.wowlan.tcp)
7666                 return -EINVAL;
7667
7668         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7669                         nla_data(attr), nla_len(attr),
7670                         nl80211_wowlan_tcp_policy);
7671         if (err)
7672                 return err;
7673
7674         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7675             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7676             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7677             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7678             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7679             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7680             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7681             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7682                 return -EINVAL;
7683
7684         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7685         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7686                 return -EINVAL;
7687
7688         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7689                         rdev->wiphy.wowlan.tcp->data_interval_max ||
7690             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7691                 return -EINVAL;
7692
7693         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7694         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7695                 return -EINVAL;
7696
7697         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7698         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7699                 return -EINVAL;
7700
7701         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7702                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7703
7704                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7705                 tokens_size = tokln - sizeof(*tok);
7706
7707                 if (!tok->len || tokens_size % tok->len)
7708                         return -EINVAL;
7709                 if (!rdev->wiphy.wowlan.tcp->tok)
7710                         return -EINVAL;
7711                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7712                         return -EINVAL;
7713                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7714                         return -EINVAL;
7715                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7716                         return -EINVAL;
7717                 if (tok->offset + tok->len > data_size)
7718                         return -EINVAL;
7719         }
7720
7721         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7722                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7723                 if (!rdev->wiphy.wowlan.tcp->seq)
7724                         return -EINVAL;
7725                 if (seq->len == 0 || seq->len > 4)
7726                         return -EINVAL;
7727                 if (seq->len + seq->offset > data_size)
7728                         return -EINVAL;
7729         }
7730
7731         size = sizeof(*cfg);
7732         size += data_size;
7733         size += wake_size + wake_mask_size;
7734         size += tokens_size;
7735
7736         cfg = kzalloc(size, GFP_KERNEL);
7737         if (!cfg)
7738                 return -ENOMEM;
7739         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7740         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7741         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7742                ETH_ALEN);
7743         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7744                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7745         else
7746                 port = 0;
7747 #ifdef CONFIG_INET
7748         /* allocate a socket and port for it and use it */
7749         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7750                             IPPROTO_TCP, &cfg->sock, 1);
7751         if (err) {
7752                 kfree(cfg);
7753                 return err;
7754         }
7755         if (inet_csk_get_port(cfg->sock->sk, port)) {
7756                 sock_release(cfg->sock);
7757                 kfree(cfg);
7758                 return -EADDRINUSE;
7759         }
7760         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7761 #else
7762         if (!port) {
7763                 kfree(cfg);
7764                 return -EINVAL;
7765         }
7766         cfg->src_port = port;
7767 #endif
7768
7769         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7770         cfg->payload_len = data_size;
7771         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7772         memcpy((void *)cfg->payload,
7773                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7774                data_size);
7775         if (seq)
7776                 cfg->payload_seq = *seq;
7777         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7778         cfg->wake_len = wake_size;
7779         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7780         memcpy((void *)cfg->wake_data,
7781                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7782                wake_size);
7783         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7784                          data_size + wake_size;
7785         memcpy((void *)cfg->wake_mask,
7786                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7787                wake_mask_size);
7788         if (tok) {
7789                 cfg->tokens_size = tokens_size;
7790                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7791         }
7792
7793         trig->tcp = cfg;
7794
7795         return 0;
7796 }
7797
7798 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7799 {
7800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7801         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7802         struct cfg80211_wowlan new_triggers = {};
7803         struct cfg80211_wowlan *ntrig;
7804         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7805         int err, i;
7806         bool prev_enabled = rdev->wowlan;
7807
7808         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7809             !rdev->wiphy.wowlan.tcp)
7810                 return -EOPNOTSUPP;
7811
7812         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7813                 cfg80211_rdev_free_wowlan(rdev);
7814                 rdev->wowlan = NULL;
7815                 goto set_wakeup;
7816         }
7817
7818         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7819                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7820                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7821                         nl80211_wowlan_policy);
7822         if (err)
7823                 return err;
7824
7825         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7826                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7827                         return -EINVAL;
7828                 new_triggers.any = true;
7829         }
7830
7831         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7832                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7833                         return -EINVAL;
7834                 new_triggers.disconnect = true;
7835         }
7836
7837         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7838                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7839                         return -EINVAL;
7840                 new_triggers.magic_pkt = true;
7841         }
7842
7843         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7844                 return -EINVAL;
7845
7846         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7847                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7848                         return -EINVAL;
7849                 new_triggers.gtk_rekey_failure = true;
7850         }
7851
7852         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7853                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7854                         return -EINVAL;
7855                 new_triggers.eap_identity_req = true;
7856         }
7857
7858         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7859                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7860                         return -EINVAL;
7861                 new_triggers.four_way_handshake = true;
7862         }
7863
7864         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7865                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7866                         return -EINVAL;
7867                 new_triggers.rfkill_release = true;
7868         }
7869
7870         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7871                 struct nlattr *pat;
7872                 int n_patterns = 0;
7873                 int rem, pat_len, mask_len, pkt_offset;
7874                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7875
7876                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7877                                     rem)
7878                         n_patterns++;
7879                 if (n_patterns > wowlan->n_patterns)
7880                         return -EINVAL;
7881
7882                 new_triggers.patterns = kcalloc(n_patterns,
7883                                                 sizeof(new_triggers.patterns[0]),
7884                                                 GFP_KERNEL);
7885                 if (!new_triggers.patterns)
7886                         return -ENOMEM;
7887
7888                 new_triggers.n_patterns = n_patterns;
7889                 i = 0;
7890
7891                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7892                                     rem) {
7893                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7894                                   nla_data(pat), nla_len(pat), NULL);
7895                         err = -EINVAL;
7896                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7897                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7898                                 goto error;
7899                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7900                         mask_len = DIV_ROUND_UP(pat_len, 8);
7901                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7902                             mask_len)
7903                                 goto error;
7904                         if (pat_len > wowlan->pattern_max_len ||
7905                             pat_len < wowlan->pattern_min_len)
7906                                 goto error;
7907
7908                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7909                                 pkt_offset = 0;
7910                         else
7911                                 pkt_offset = nla_get_u32(
7912                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7913                         if (pkt_offset > wowlan->max_pkt_offset)
7914                                 goto error;
7915                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7916
7917                         new_triggers.patterns[i].mask =
7918                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7919                         if (!new_triggers.patterns[i].mask) {
7920                                 err = -ENOMEM;
7921                                 goto error;
7922                         }
7923                         new_triggers.patterns[i].pattern =
7924                                 new_triggers.patterns[i].mask + mask_len;
7925                         memcpy(new_triggers.patterns[i].mask,
7926                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7927                                mask_len);
7928                         new_triggers.patterns[i].pattern_len = pat_len;
7929                         memcpy(new_triggers.patterns[i].pattern,
7930                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7931                                pat_len);
7932                         i++;
7933                 }
7934         }
7935
7936         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7937                 err = nl80211_parse_wowlan_tcp(
7938                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7939                         &new_triggers);
7940                 if (err)
7941                         goto error;
7942         }
7943
7944         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7945         if (!ntrig) {
7946                 err = -ENOMEM;
7947                 goto error;
7948         }
7949         cfg80211_rdev_free_wowlan(rdev);
7950         rdev->wowlan = ntrig;
7951
7952  set_wakeup:
7953         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7954                 rdev_set_wakeup(rdev, rdev->wowlan);
7955
7956         return 0;
7957  error:
7958         for (i = 0; i < new_triggers.n_patterns; i++)
7959                 kfree(new_triggers.patterns[i].mask);
7960         kfree(new_triggers.patterns);
7961         if (new_triggers.tcp && new_triggers.tcp->sock)
7962                 sock_release(new_triggers.tcp->sock);
7963         kfree(new_triggers.tcp);
7964         return err;
7965 }
7966 #endif
7967
7968 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7969 {
7970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7971         struct net_device *dev = info->user_ptr[1];
7972         struct wireless_dev *wdev = dev->ieee80211_ptr;
7973         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7974         struct cfg80211_gtk_rekey_data rekey_data;
7975         int err;
7976
7977         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7978                 return -EINVAL;
7979
7980         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7981                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7982                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7983                         nl80211_rekey_policy);
7984         if (err)
7985                 return err;
7986
7987         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7988                 return -ERANGE;
7989         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7990                 return -ERANGE;
7991         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7992                 return -ERANGE;
7993
7994         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7995                NL80211_KEK_LEN);
7996         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7997                NL80211_KCK_LEN);
7998         memcpy(rekey_data.replay_ctr,
7999                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8000                NL80211_REPLAY_CTR_LEN);
8001
8002         wdev_lock(wdev);
8003         if (!wdev->current_bss) {
8004                 err = -ENOTCONN;
8005                 goto out;
8006         }
8007
8008         if (!rdev->ops->set_rekey_data) {
8009                 err = -EOPNOTSUPP;
8010                 goto out;
8011         }
8012
8013         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8014  out:
8015         wdev_unlock(wdev);
8016         return err;
8017 }
8018
8019 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8020                                              struct genl_info *info)
8021 {
8022         struct net_device *dev = info->user_ptr[1];
8023         struct wireless_dev *wdev = dev->ieee80211_ptr;
8024
8025         if (wdev->iftype != NL80211_IFTYPE_AP &&
8026             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8027                 return -EINVAL;
8028
8029         if (wdev->ap_unexpected_nlportid)
8030                 return -EBUSY;
8031
8032         wdev->ap_unexpected_nlportid = info->snd_portid;
8033         return 0;
8034 }
8035
8036 static int nl80211_probe_client(struct sk_buff *skb,
8037                                 struct genl_info *info)
8038 {
8039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8040         struct net_device *dev = info->user_ptr[1];
8041         struct wireless_dev *wdev = dev->ieee80211_ptr;
8042         struct sk_buff *msg;
8043         void *hdr;
8044         const u8 *addr;
8045         u64 cookie;
8046         int err;
8047
8048         if (wdev->iftype != NL80211_IFTYPE_AP &&
8049             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8050                 return -EOPNOTSUPP;
8051
8052         if (!info->attrs[NL80211_ATTR_MAC])
8053                 return -EINVAL;
8054
8055         if (!rdev->ops->probe_client)
8056                 return -EOPNOTSUPP;
8057
8058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8059         if (!msg)
8060                 return -ENOMEM;
8061
8062         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8063                              NL80211_CMD_PROBE_CLIENT);
8064
8065         if (IS_ERR(hdr)) {
8066                 err = PTR_ERR(hdr);
8067                 goto free_msg;
8068         }
8069
8070         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8071
8072         err = rdev_probe_client(rdev, dev, addr, &cookie);
8073         if (err)
8074                 goto free_msg;
8075
8076         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8077                 goto nla_put_failure;
8078
8079         genlmsg_end(msg, hdr);
8080
8081         return genlmsg_reply(msg, info);
8082
8083  nla_put_failure:
8084         err = -ENOBUFS;
8085  free_msg:
8086         nlmsg_free(msg);
8087         return err;
8088 }
8089
8090 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8091 {
8092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8093         struct cfg80211_beacon_registration *reg, *nreg;
8094         int rv;
8095
8096         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8097                 return -EOPNOTSUPP;
8098
8099         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8100         if (!nreg)
8101                 return -ENOMEM;
8102
8103         /* First, check if already registered. */
8104         spin_lock_bh(&rdev->beacon_registrations_lock);
8105         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8106                 if (reg->nlportid == info->snd_portid) {
8107                         rv = -EALREADY;
8108                         goto out_err;
8109                 }
8110         }
8111         /* Add it to the list */
8112         nreg->nlportid = info->snd_portid;
8113         list_add(&nreg->list, &rdev->beacon_registrations);
8114
8115         spin_unlock_bh(&rdev->beacon_registrations_lock);
8116
8117         return 0;
8118 out_err:
8119         spin_unlock_bh(&rdev->beacon_registrations_lock);
8120         kfree(nreg);
8121         return rv;
8122 }
8123
8124 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8125 {
8126         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8127         struct wireless_dev *wdev = info->user_ptr[1];
8128         int err;
8129
8130         if (!rdev->ops->start_p2p_device)
8131                 return -EOPNOTSUPP;
8132
8133         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8134                 return -EOPNOTSUPP;
8135
8136         if (wdev->p2p_started)
8137                 return 0;
8138
8139         mutex_lock(&rdev->devlist_mtx);
8140         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8141         mutex_unlock(&rdev->devlist_mtx);
8142         if (err)
8143                 return err;
8144
8145         err = rdev_start_p2p_device(rdev, wdev);
8146         if (err)
8147                 return err;
8148
8149         wdev->p2p_started = true;
8150         mutex_lock(&rdev->devlist_mtx);
8151         rdev->opencount++;
8152         mutex_unlock(&rdev->devlist_mtx);
8153
8154         return 0;
8155 }
8156
8157 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8158 {
8159         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8160         struct wireless_dev *wdev = info->user_ptr[1];
8161
8162         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8163                 return -EOPNOTSUPP;
8164
8165         if (!rdev->ops->stop_p2p_device)
8166                 return -EOPNOTSUPP;
8167
8168         mutex_lock(&rdev->devlist_mtx);
8169         mutex_lock(&rdev->sched_scan_mtx);
8170         cfg80211_stop_p2p_device(rdev, wdev);
8171         mutex_unlock(&rdev->sched_scan_mtx);
8172         mutex_unlock(&rdev->devlist_mtx);
8173
8174         return 0;
8175 }
8176
8177 static int nl80211_get_protocol_features(struct sk_buff *skb,
8178                                          struct genl_info *info)
8179 {
8180         void *hdr;
8181         struct sk_buff *msg;
8182
8183         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8184         if (!msg)
8185                 return -ENOMEM;
8186
8187         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8188                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8189         if (!hdr)
8190                 goto nla_put_failure;
8191
8192         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8193                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8194                 goto nla_put_failure;
8195
8196         genlmsg_end(msg, hdr);
8197         return genlmsg_reply(msg, info);
8198
8199  nla_put_failure:
8200         kfree_skb(msg);
8201         return -ENOBUFS;
8202 }
8203
8204 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8205 {
8206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8207         struct cfg80211_update_ft_ies_params ft_params;
8208         struct net_device *dev = info->user_ptr[1];
8209
8210         if (!rdev->ops->update_ft_ies)
8211                 return -EOPNOTSUPP;
8212
8213         if (!info->attrs[NL80211_ATTR_MDID] ||
8214             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8215                 return -EINVAL;
8216
8217         memset(&ft_params, 0, sizeof(ft_params));
8218         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8219         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8220         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8221
8222         return rdev_update_ft_ies(rdev, dev, &ft_params);
8223 }
8224
8225 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8226                                        struct genl_info *info)
8227 {
8228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8229         struct wireless_dev *wdev = info->user_ptr[1];
8230         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8231         u16 duration;
8232         int ret;
8233
8234         if (!rdev->ops->crit_proto_start)
8235                 return -EOPNOTSUPP;
8236
8237         if (WARN_ON(!rdev->ops->crit_proto_stop))
8238                 return -EINVAL;
8239
8240         if (rdev->crit_proto_nlportid)
8241                 return -EBUSY;
8242
8243         /* determine protocol if provided */
8244         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8245                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8246
8247         if (proto >= NUM_NL80211_CRIT_PROTO)
8248                 return -EINVAL;
8249
8250         /* timeout must be provided */
8251         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8252                 return -EINVAL;
8253
8254         duration =
8255                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8256
8257         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8258                 return -ERANGE;
8259
8260         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8261         if (!ret)
8262                 rdev->crit_proto_nlportid = info->snd_portid;
8263
8264         return ret;
8265 }
8266
8267 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8268                                       struct genl_info *info)
8269 {
8270         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8271         struct wireless_dev *wdev = info->user_ptr[1];
8272
8273         if (!rdev->ops->crit_proto_stop)
8274                 return -EOPNOTSUPP;
8275
8276         if (rdev->crit_proto_nlportid) {
8277                 rdev->crit_proto_nlportid = 0;
8278                 rdev_crit_proto_stop(rdev, wdev);
8279         }
8280         return 0;
8281 }
8282
8283 #define NL80211_FLAG_NEED_WIPHY         0x01
8284 #define NL80211_FLAG_NEED_NETDEV        0x02
8285 #define NL80211_FLAG_NEED_RTNL          0x04
8286 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8287 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8288                                          NL80211_FLAG_CHECK_NETDEV_UP)
8289 #define NL80211_FLAG_NEED_WDEV          0x10
8290 /* If a netdev is associated, it must be UP, P2P must be started */
8291 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8292                                          NL80211_FLAG_CHECK_NETDEV_UP)
8293
8294 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8295                             struct genl_info *info)
8296 {
8297         struct cfg80211_registered_device *rdev;
8298         struct wireless_dev *wdev;
8299         struct net_device *dev;
8300         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8301
8302         if (rtnl)
8303                 rtnl_lock();
8304
8305         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8306                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8307                 if (IS_ERR(rdev)) {
8308                         if (rtnl)
8309                                 rtnl_unlock();
8310                         return PTR_ERR(rdev);
8311                 }
8312                 info->user_ptr[0] = rdev;
8313         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8314                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8315                 mutex_lock(&cfg80211_mutex);
8316                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8317                                                   info->attrs);
8318                 if (IS_ERR(wdev)) {
8319                         mutex_unlock(&cfg80211_mutex);
8320                         if (rtnl)
8321                                 rtnl_unlock();
8322                         return PTR_ERR(wdev);
8323                 }
8324
8325                 dev = wdev->netdev;
8326                 rdev = wiphy_to_dev(wdev->wiphy);
8327
8328                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8329                         if (!dev) {
8330                                 mutex_unlock(&cfg80211_mutex);
8331                                 if (rtnl)
8332                                         rtnl_unlock();
8333                                 return -EINVAL;
8334                         }
8335
8336                         info->user_ptr[1] = dev;
8337                 } else {
8338                         info->user_ptr[1] = wdev;
8339                 }
8340
8341                 if (dev) {
8342                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8343                             !netif_running(dev)) {
8344                                 mutex_unlock(&cfg80211_mutex);
8345                                 if (rtnl)
8346                                         rtnl_unlock();
8347                                 return -ENETDOWN;
8348                         }
8349
8350                         dev_hold(dev);
8351                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8352                         if (!wdev->p2p_started) {
8353                                 mutex_unlock(&cfg80211_mutex);
8354                                 if (rtnl)
8355                                         rtnl_unlock();
8356                                 return -ENETDOWN;
8357                         }
8358                 }
8359
8360                 cfg80211_lock_rdev(rdev);
8361
8362                 mutex_unlock(&cfg80211_mutex);
8363
8364                 info->user_ptr[0] = rdev;
8365         }
8366
8367         return 0;
8368 }
8369
8370 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8371                               struct genl_info *info)
8372 {
8373         if (info->user_ptr[0])
8374                 cfg80211_unlock_rdev(info->user_ptr[0]);
8375         if (info->user_ptr[1]) {
8376                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8377                         struct wireless_dev *wdev = info->user_ptr[1];
8378
8379                         if (wdev->netdev)
8380                                 dev_put(wdev->netdev);
8381                 } else {
8382                         dev_put(info->user_ptr[1]);
8383                 }
8384         }
8385         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8386                 rtnl_unlock();
8387 }
8388
8389 static struct genl_ops nl80211_ops[] = {
8390         {
8391                 .cmd = NL80211_CMD_GET_WIPHY,
8392                 .doit = nl80211_get_wiphy,
8393                 .dumpit = nl80211_dump_wiphy,
8394                 .policy = nl80211_policy,
8395                 /* can be retrieved by unprivileged users */
8396                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
8397         },
8398         {
8399                 .cmd = NL80211_CMD_SET_WIPHY,
8400                 .doit = nl80211_set_wiphy,
8401                 .policy = nl80211_policy,
8402                 .flags = GENL_ADMIN_PERM,
8403                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8404         },
8405         {
8406                 .cmd = NL80211_CMD_GET_INTERFACE,
8407                 .doit = nl80211_get_interface,
8408                 .dumpit = nl80211_dump_interface,
8409                 .policy = nl80211_policy,
8410                 /* can be retrieved by unprivileged users */
8411                 .internal_flags = NL80211_FLAG_NEED_WDEV,
8412         },
8413         {
8414                 .cmd = NL80211_CMD_SET_INTERFACE,
8415                 .doit = nl80211_set_interface,
8416                 .policy = nl80211_policy,
8417                 .flags = GENL_ADMIN_PERM,
8418                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8419                                   NL80211_FLAG_NEED_RTNL,
8420         },
8421         {
8422                 .cmd = NL80211_CMD_NEW_INTERFACE,
8423                 .doit = nl80211_new_interface,
8424                 .policy = nl80211_policy,
8425                 .flags = GENL_ADMIN_PERM,
8426                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8427                                   NL80211_FLAG_NEED_RTNL,
8428         },
8429         {
8430                 .cmd = NL80211_CMD_DEL_INTERFACE,
8431                 .doit = nl80211_del_interface,
8432                 .policy = nl80211_policy,
8433                 .flags = GENL_ADMIN_PERM,
8434                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8435                                   NL80211_FLAG_NEED_RTNL,
8436         },
8437         {
8438                 .cmd = NL80211_CMD_GET_KEY,
8439                 .doit = nl80211_get_key,
8440                 .policy = nl80211_policy,
8441                 .flags = GENL_ADMIN_PERM,
8442                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8443                                   NL80211_FLAG_NEED_RTNL,
8444         },
8445         {
8446                 .cmd = NL80211_CMD_SET_KEY,
8447                 .doit = nl80211_set_key,
8448                 .policy = nl80211_policy,
8449                 .flags = GENL_ADMIN_PERM,
8450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8451                                   NL80211_FLAG_NEED_RTNL,
8452         },
8453         {
8454                 .cmd = NL80211_CMD_NEW_KEY,
8455                 .doit = nl80211_new_key,
8456                 .policy = nl80211_policy,
8457                 .flags = GENL_ADMIN_PERM,
8458                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8459                                   NL80211_FLAG_NEED_RTNL,
8460         },
8461         {
8462                 .cmd = NL80211_CMD_DEL_KEY,
8463                 .doit = nl80211_del_key,
8464                 .policy = nl80211_policy,
8465                 .flags = GENL_ADMIN_PERM,
8466                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8467                                   NL80211_FLAG_NEED_RTNL,
8468         },
8469         {
8470                 .cmd = NL80211_CMD_SET_BEACON,
8471                 .policy = nl80211_policy,
8472                 .flags = GENL_ADMIN_PERM,
8473                 .doit = nl80211_set_beacon,
8474                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8475                                   NL80211_FLAG_NEED_RTNL,
8476         },
8477         {
8478                 .cmd = NL80211_CMD_START_AP,
8479                 .policy = nl80211_policy,
8480                 .flags = GENL_ADMIN_PERM,
8481                 .doit = nl80211_start_ap,
8482                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8483                                   NL80211_FLAG_NEED_RTNL,
8484         },
8485         {
8486                 .cmd = NL80211_CMD_STOP_AP,
8487                 .policy = nl80211_policy,
8488                 .flags = GENL_ADMIN_PERM,
8489                 .doit = nl80211_stop_ap,
8490                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8491                                   NL80211_FLAG_NEED_RTNL,
8492         },
8493         {
8494                 .cmd = NL80211_CMD_GET_STATION,
8495                 .doit = nl80211_get_station,
8496                 .dumpit = nl80211_dump_station,
8497                 .policy = nl80211_policy,
8498                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8499                                   NL80211_FLAG_NEED_RTNL,
8500         },
8501         {
8502                 .cmd = NL80211_CMD_SET_STATION,
8503                 .doit = nl80211_set_station,
8504                 .policy = nl80211_policy,
8505                 .flags = GENL_ADMIN_PERM,
8506                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8507                                   NL80211_FLAG_NEED_RTNL,
8508         },
8509         {
8510                 .cmd = NL80211_CMD_NEW_STATION,
8511                 .doit = nl80211_new_station,
8512                 .policy = nl80211_policy,
8513                 .flags = GENL_ADMIN_PERM,
8514                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8515                                   NL80211_FLAG_NEED_RTNL,
8516         },
8517         {
8518                 .cmd = NL80211_CMD_DEL_STATION,
8519                 .doit = nl80211_del_station,
8520                 .policy = nl80211_policy,
8521                 .flags = GENL_ADMIN_PERM,
8522                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8523                                   NL80211_FLAG_NEED_RTNL,
8524         },
8525         {
8526                 .cmd = NL80211_CMD_GET_MPATH,
8527                 .doit = nl80211_get_mpath,
8528                 .dumpit = nl80211_dump_mpath,
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_SET_MPATH,
8536                 .doit = nl80211_set_mpath,
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_NEW_MPATH,
8544                 .doit = nl80211_new_mpath,
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_DEL_MPATH,
8552                 .doit = nl80211_del_mpath,
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_SET_BSS,
8560                 .doit = nl80211_set_bss,
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_GET_REG,
8568                 .doit = nl80211_get_reg,
8569                 .policy = nl80211_policy,
8570                 /* can be retrieved by unprivileged users */
8571         },
8572         {
8573                 .cmd = NL80211_CMD_SET_REG,
8574                 .doit = nl80211_set_reg,
8575                 .policy = nl80211_policy,
8576                 .flags = GENL_ADMIN_PERM,
8577         },
8578         {
8579                 .cmd = NL80211_CMD_REQ_SET_REG,
8580                 .doit = nl80211_req_set_reg,
8581                 .policy = nl80211_policy,
8582                 .flags = GENL_ADMIN_PERM,
8583         },
8584         {
8585                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8586                 .doit = nl80211_get_mesh_config,
8587                 .policy = nl80211_policy,
8588                 /* can be retrieved by unprivileged users */
8589                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8590                                   NL80211_FLAG_NEED_RTNL,
8591         },
8592         {
8593                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8594                 .doit = nl80211_update_mesh_config,
8595                 .policy = nl80211_policy,
8596                 .flags = GENL_ADMIN_PERM,
8597                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8598                                   NL80211_FLAG_NEED_RTNL,
8599         },
8600         {
8601                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8602                 .doit = nl80211_trigger_scan,
8603                 .policy = nl80211_policy,
8604                 .flags = GENL_ADMIN_PERM,
8605                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8606                                   NL80211_FLAG_NEED_RTNL,
8607         },
8608         {
8609                 .cmd = NL80211_CMD_GET_SCAN,
8610                 .policy = nl80211_policy,
8611                 .dumpit = nl80211_dump_scan,
8612         },
8613         {
8614                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8615                 .doit = nl80211_start_sched_scan,
8616                 .policy = nl80211_policy,
8617                 .flags = GENL_ADMIN_PERM,
8618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8619                                   NL80211_FLAG_NEED_RTNL,
8620         },
8621         {
8622                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8623                 .doit = nl80211_stop_sched_scan,
8624                 .policy = nl80211_policy,
8625                 .flags = GENL_ADMIN_PERM,
8626                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8627                                   NL80211_FLAG_NEED_RTNL,
8628         },
8629         {
8630                 .cmd = NL80211_CMD_AUTHENTICATE,
8631                 .doit = nl80211_authenticate,
8632                 .policy = nl80211_policy,
8633                 .flags = GENL_ADMIN_PERM,
8634                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8635                                   NL80211_FLAG_NEED_RTNL,
8636         },
8637         {
8638                 .cmd = NL80211_CMD_ASSOCIATE,
8639                 .doit = nl80211_associate,
8640                 .policy = nl80211_policy,
8641                 .flags = GENL_ADMIN_PERM,
8642                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8643                                   NL80211_FLAG_NEED_RTNL,
8644         },
8645         {
8646                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8647                 .doit = nl80211_deauthenticate,
8648                 .policy = nl80211_policy,
8649                 .flags = GENL_ADMIN_PERM,
8650                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8651                                   NL80211_FLAG_NEED_RTNL,
8652         },
8653         {
8654                 .cmd = NL80211_CMD_DISASSOCIATE,
8655                 .doit = nl80211_disassociate,
8656                 .policy = nl80211_policy,
8657                 .flags = GENL_ADMIN_PERM,
8658                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8659                                   NL80211_FLAG_NEED_RTNL,
8660         },
8661         {
8662                 .cmd = NL80211_CMD_JOIN_IBSS,
8663                 .doit = nl80211_join_ibss,
8664                 .policy = nl80211_policy,
8665                 .flags = GENL_ADMIN_PERM,
8666                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8667                                   NL80211_FLAG_NEED_RTNL,
8668         },
8669         {
8670                 .cmd = NL80211_CMD_LEAVE_IBSS,
8671                 .doit = nl80211_leave_ibss,
8672                 .policy = nl80211_policy,
8673                 .flags = GENL_ADMIN_PERM,
8674                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8675                                   NL80211_FLAG_NEED_RTNL,
8676         },
8677 #ifdef CONFIG_NL80211_TESTMODE
8678         {
8679                 .cmd = NL80211_CMD_TESTMODE,
8680                 .doit = nl80211_testmode_do,
8681                 .dumpit = nl80211_testmode_dump,
8682                 .policy = nl80211_policy,
8683                 .flags = GENL_ADMIN_PERM,
8684                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8685                                   NL80211_FLAG_NEED_RTNL,
8686         },
8687 #endif
8688         {
8689                 .cmd = NL80211_CMD_CONNECT,
8690                 .doit = nl80211_connect,
8691                 .policy = nl80211_policy,
8692                 .flags = GENL_ADMIN_PERM,
8693                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8694                                   NL80211_FLAG_NEED_RTNL,
8695         },
8696         {
8697                 .cmd = NL80211_CMD_DISCONNECT,
8698                 .doit = nl80211_disconnect,
8699                 .policy = nl80211_policy,
8700                 .flags = GENL_ADMIN_PERM,
8701                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8702                                   NL80211_FLAG_NEED_RTNL,
8703         },
8704         {
8705                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8706                 .doit = nl80211_wiphy_netns,
8707                 .policy = nl80211_policy,
8708                 .flags = GENL_ADMIN_PERM,
8709                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8710                                   NL80211_FLAG_NEED_RTNL,
8711         },
8712         {
8713                 .cmd = NL80211_CMD_GET_SURVEY,
8714                 .policy = nl80211_policy,
8715                 .dumpit = nl80211_dump_survey,
8716         },
8717         {
8718                 .cmd = NL80211_CMD_SET_PMKSA,
8719                 .doit = nl80211_setdel_pmksa,
8720                 .policy = nl80211_policy,
8721                 .flags = GENL_ADMIN_PERM,
8722                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8723                                   NL80211_FLAG_NEED_RTNL,
8724         },
8725         {
8726                 .cmd = NL80211_CMD_DEL_PMKSA,
8727                 .doit = nl80211_setdel_pmksa,
8728                 .policy = nl80211_policy,
8729                 .flags = GENL_ADMIN_PERM,
8730                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8731                                   NL80211_FLAG_NEED_RTNL,
8732         },
8733         {
8734                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8735                 .doit = nl80211_flush_pmksa,
8736                 .policy = nl80211_policy,
8737                 .flags = GENL_ADMIN_PERM,
8738                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8739                                   NL80211_FLAG_NEED_RTNL,
8740         },
8741         {
8742                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8743                 .doit = nl80211_remain_on_channel,
8744                 .policy = nl80211_policy,
8745                 .flags = GENL_ADMIN_PERM,
8746                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8747                                   NL80211_FLAG_NEED_RTNL,
8748         },
8749         {
8750                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8751                 .doit = nl80211_cancel_remain_on_channel,
8752                 .policy = nl80211_policy,
8753                 .flags = GENL_ADMIN_PERM,
8754                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8755                                   NL80211_FLAG_NEED_RTNL,
8756         },
8757         {
8758                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8759                 .doit = nl80211_set_tx_bitrate_mask,
8760                 .policy = nl80211_policy,
8761                 .flags = GENL_ADMIN_PERM,
8762                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8763                                   NL80211_FLAG_NEED_RTNL,
8764         },
8765         {
8766                 .cmd = NL80211_CMD_REGISTER_FRAME,
8767                 .doit = nl80211_register_mgmt,
8768                 .policy = nl80211_policy,
8769                 .flags = GENL_ADMIN_PERM,
8770                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8771                                   NL80211_FLAG_NEED_RTNL,
8772         },
8773         {
8774                 .cmd = NL80211_CMD_FRAME,
8775                 .doit = nl80211_tx_mgmt,
8776                 .policy = nl80211_policy,
8777                 .flags = GENL_ADMIN_PERM,
8778                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8779                                   NL80211_FLAG_NEED_RTNL,
8780         },
8781         {
8782                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8783                 .doit = nl80211_tx_mgmt_cancel_wait,
8784                 .policy = nl80211_policy,
8785                 .flags = GENL_ADMIN_PERM,
8786                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8787                                   NL80211_FLAG_NEED_RTNL,
8788         },
8789         {
8790                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8791                 .doit = nl80211_set_power_save,
8792                 .policy = nl80211_policy,
8793                 .flags = GENL_ADMIN_PERM,
8794                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8795                                   NL80211_FLAG_NEED_RTNL,
8796         },
8797         {
8798                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8799                 .doit = nl80211_get_power_save,
8800                 .policy = nl80211_policy,
8801                 /* can be retrieved by unprivileged users */
8802                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8803                                   NL80211_FLAG_NEED_RTNL,
8804         },
8805         {
8806                 .cmd = NL80211_CMD_SET_CQM,
8807                 .doit = nl80211_set_cqm,
8808                 .policy = nl80211_policy,
8809                 .flags = GENL_ADMIN_PERM,
8810                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8811                                   NL80211_FLAG_NEED_RTNL,
8812         },
8813         {
8814                 .cmd = NL80211_CMD_SET_CHANNEL,
8815                 .doit = nl80211_set_channel,
8816                 .policy = nl80211_policy,
8817                 .flags = GENL_ADMIN_PERM,
8818                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8819                                   NL80211_FLAG_NEED_RTNL,
8820         },
8821         {
8822                 .cmd = NL80211_CMD_SET_WDS_PEER,
8823                 .doit = nl80211_set_wds_peer,
8824                 .policy = nl80211_policy,
8825                 .flags = GENL_ADMIN_PERM,
8826                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8827                                   NL80211_FLAG_NEED_RTNL,
8828         },
8829         {
8830                 .cmd = NL80211_CMD_JOIN_MESH,
8831                 .doit = nl80211_join_mesh,
8832                 .policy = nl80211_policy,
8833                 .flags = GENL_ADMIN_PERM,
8834                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8835                                   NL80211_FLAG_NEED_RTNL,
8836         },
8837         {
8838                 .cmd = NL80211_CMD_LEAVE_MESH,
8839                 .doit = nl80211_leave_mesh,
8840                 .policy = nl80211_policy,
8841                 .flags = GENL_ADMIN_PERM,
8842                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8843                                   NL80211_FLAG_NEED_RTNL,
8844         },
8845 #ifdef CONFIG_PM
8846         {
8847                 .cmd = NL80211_CMD_GET_WOWLAN,
8848                 .doit = nl80211_get_wowlan,
8849                 .policy = nl80211_policy,
8850                 /* can be retrieved by unprivileged users */
8851                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8852                                   NL80211_FLAG_NEED_RTNL,
8853         },
8854         {
8855                 .cmd = NL80211_CMD_SET_WOWLAN,
8856                 .doit = nl80211_set_wowlan,
8857                 .policy = nl80211_policy,
8858                 .flags = GENL_ADMIN_PERM,
8859                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8860                                   NL80211_FLAG_NEED_RTNL,
8861         },
8862 #endif
8863         {
8864                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8865                 .doit = nl80211_set_rekey_data,
8866                 .policy = nl80211_policy,
8867                 .flags = GENL_ADMIN_PERM,
8868                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8869                                   NL80211_FLAG_NEED_RTNL,
8870         },
8871         {
8872                 .cmd = NL80211_CMD_TDLS_MGMT,
8873                 .doit = nl80211_tdls_mgmt,
8874                 .policy = nl80211_policy,
8875                 .flags = GENL_ADMIN_PERM,
8876                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8877                                   NL80211_FLAG_NEED_RTNL,
8878         },
8879         {
8880                 .cmd = NL80211_CMD_TDLS_OPER,
8881                 .doit = nl80211_tdls_oper,
8882                 .policy = nl80211_policy,
8883                 .flags = GENL_ADMIN_PERM,
8884                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8885                                   NL80211_FLAG_NEED_RTNL,
8886         },
8887         {
8888                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8889                 .doit = nl80211_register_unexpected_frame,
8890                 .policy = nl80211_policy,
8891                 .flags = GENL_ADMIN_PERM,
8892                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8893                                   NL80211_FLAG_NEED_RTNL,
8894         },
8895         {
8896                 .cmd = NL80211_CMD_PROBE_CLIENT,
8897                 .doit = nl80211_probe_client,
8898                 .policy = nl80211_policy,
8899                 .flags = GENL_ADMIN_PERM,
8900                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8901                                   NL80211_FLAG_NEED_RTNL,
8902         },
8903         {
8904                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8905                 .doit = nl80211_register_beacons,
8906                 .policy = nl80211_policy,
8907                 .flags = GENL_ADMIN_PERM,
8908                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8909                                   NL80211_FLAG_NEED_RTNL,
8910         },
8911         {
8912                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8913                 .doit = nl80211_set_noack_map,
8914                 .policy = nl80211_policy,
8915                 .flags = GENL_ADMIN_PERM,
8916                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8917                                   NL80211_FLAG_NEED_RTNL,
8918         },
8919         {
8920                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8921                 .doit = nl80211_start_p2p_device,
8922                 .policy = nl80211_policy,
8923                 .flags = GENL_ADMIN_PERM,
8924                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8925                                   NL80211_FLAG_NEED_RTNL,
8926         },
8927         {
8928                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8929                 .doit = nl80211_stop_p2p_device,
8930                 .policy = nl80211_policy,
8931                 .flags = GENL_ADMIN_PERM,
8932                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8933                                   NL80211_FLAG_NEED_RTNL,
8934         },
8935         {
8936                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8937                 .doit = nl80211_set_mcast_rate,
8938                 .policy = nl80211_policy,
8939                 .flags = GENL_ADMIN_PERM,
8940                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8941                                   NL80211_FLAG_NEED_RTNL,
8942         },
8943         {
8944                 .cmd = NL80211_CMD_SET_MAC_ACL,
8945                 .doit = nl80211_set_mac_acl,
8946                 .policy = nl80211_policy,
8947                 .flags = GENL_ADMIN_PERM,
8948                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8949                                   NL80211_FLAG_NEED_RTNL,
8950         },
8951         {
8952                 .cmd = NL80211_CMD_RADAR_DETECT,
8953                 .doit = nl80211_start_radar_detection,
8954                 .policy = nl80211_policy,
8955                 .flags = GENL_ADMIN_PERM,
8956                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8957                                   NL80211_FLAG_NEED_RTNL,
8958         },
8959         {
8960                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8961                 .doit = nl80211_get_protocol_features,
8962                 .policy = nl80211_policy,
8963         },
8964         {
8965                 .cmd = NL80211_CMD_UPDATE_FT_IES,
8966                 .doit = nl80211_update_ft_ies,
8967                 .policy = nl80211_policy,
8968                 .flags = GENL_ADMIN_PERM,
8969                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8970                                   NL80211_FLAG_NEED_RTNL,
8971         },
8972         {
8973                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
8974                 .doit = nl80211_crit_protocol_start,
8975                 .policy = nl80211_policy,
8976                 .flags = GENL_ADMIN_PERM,
8977                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8978                                   NL80211_FLAG_NEED_RTNL,
8979         },
8980         {
8981                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
8982                 .doit = nl80211_crit_protocol_stop,
8983                 .policy = nl80211_policy,
8984                 .flags = GENL_ADMIN_PERM,
8985                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8986                                   NL80211_FLAG_NEED_RTNL,
8987         }
8988 };
8989
8990 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8991         .name = "mlme",
8992 };
8993
8994 /* multicast groups */
8995 static struct genl_multicast_group nl80211_config_mcgrp = {
8996         .name = "config",
8997 };
8998 static struct genl_multicast_group nl80211_scan_mcgrp = {
8999         .name = "scan",
9000 };
9001 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9002         .name = "regulatory",
9003 };
9004
9005 /* notification functions */
9006
9007 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9008 {
9009         struct sk_buff *msg;
9010
9011         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9012         if (!msg)
9013                 return;
9014
9015         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
9016                                false, NULL, NULL, NULL) < 0) {
9017                 nlmsg_free(msg);
9018                 return;
9019         }
9020
9021         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9022                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9023 }
9024
9025 static int nl80211_add_scan_req(struct sk_buff *msg,
9026                                 struct cfg80211_registered_device *rdev)
9027 {
9028         struct cfg80211_scan_request *req = rdev->scan_req;
9029         struct nlattr *nest;
9030         int i;
9031
9032         lockdep_assert_held(&rdev->sched_scan_mtx);
9033
9034         if (WARN_ON(!req))
9035                 return 0;
9036
9037         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9038         if (!nest)
9039                 goto nla_put_failure;
9040         for (i = 0; i < req->n_ssids; i++) {
9041                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9042                         goto nla_put_failure;
9043         }
9044         nla_nest_end(msg, nest);
9045
9046         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9047         if (!nest)
9048                 goto nla_put_failure;
9049         for (i = 0; i < req->n_channels; i++) {
9050                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9051                         goto nla_put_failure;
9052         }
9053         nla_nest_end(msg, nest);
9054
9055         if (req->ie &&
9056             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9057                 goto nla_put_failure;
9058
9059         if (req->flags)
9060                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9061
9062         return 0;
9063  nla_put_failure:
9064         return -ENOBUFS;
9065 }
9066
9067 static int nl80211_send_scan_msg(struct sk_buff *msg,
9068                                  struct cfg80211_registered_device *rdev,
9069                                  struct wireless_dev *wdev,
9070                                  u32 portid, u32 seq, int flags,
9071                                  u32 cmd)
9072 {
9073         void *hdr;
9074
9075         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9076         if (!hdr)
9077                 return -1;
9078
9079         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9080             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9081                                          wdev->netdev->ifindex)) ||
9082             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9083                 goto nla_put_failure;
9084
9085         /* ignore errors and send incomplete event anyway */
9086         nl80211_add_scan_req(msg, rdev);
9087
9088         return genlmsg_end(msg, hdr);
9089
9090  nla_put_failure:
9091         genlmsg_cancel(msg, hdr);
9092         return -EMSGSIZE;
9093 }
9094
9095 static int
9096 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9097                             struct cfg80211_registered_device *rdev,
9098                             struct net_device *netdev,
9099                             u32 portid, u32 seq, int flags, u32 cmd)
9100 {
9101         void *hdr;
9102
9103         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9104         if (!hdr)
9105                 return -1;
9106
9107         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9108             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9109                 goto nla_put_failure;
9110
9111         return genlmsg_end(msg, hdr);
9112
9113  nla_put_failure:
9114         genlmsg_cancel(msg, hdr);
9115         return -EMSGSIZE;
9116 }
9117
9118 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9119                              struct wireless_dev *wdev)
9120 {
9121         struct sk_buff *msg;
9122
9123         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9124         if (!msg)
9125                 return;
9126
9127         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9128                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9129                 nlmsg_free(msg);
9130                 return;
9131         }
9132
9133         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9134                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9135 }
9136
9137 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9138                             struct wireless_dev *wdev)
9139 {
9140         struct sk_buff *msg;
9141
9142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9143         if (!msg)
9144                 return;
9145
9146         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9147                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9148                 nlmsg_free(msg);
9149                 return;
9150         }
9151
9152         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9153                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9154 }
9155
9156 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9157                                struct wireless_dev *wdev)
9158 {
9159         struct sk_buff *msg;
9160
9161         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9162         if (!msg)
9163                 return;
9164
9165         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9166                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9167                 nlmsg_free(msg);
9168                 return;
9169         }
9170
9171         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9172                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9173 }
9174
9175 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9176                                      struct net_device *netdev)
9177 {
9178         struct sk_buff *msg;
9179
9180         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9181         if (!msg)
9182                 return;
9183
9184         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9185                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9186                 nlmsg_free(msg);
9187                 return;
9188         }
9189
9190         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9191                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9192 }
9193
9194 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9195                              struct net_device *netdev, u32 cmd)
9196 {
9197         struct sk_buff *msg;
9198
9199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9200         if (!msg)
9201                 return;
9202
9203         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9204                 nlmsg_free(msg);
9205                 return;
9206         }
9207
9208         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9209                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9210 }
9211
9212 /*
9213  * This can happen on global regulatory changes or device specific settings
9214  * based on custom world regulatory domains.
9215  */
9216 void nl80211_send_reg_change_event(struct regulatory_request *request)
9217 {
9218         struct sk_buff *msg;
9219         void *hdr;
9220
9221         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9222         if (!msg)
9223                 return;
9224
9225         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9226         if (!hdr) {
9227                 nlmsg_free(msg);
9228                 return;
9229         }
9230
9231         /* Userspace can always count this one always being set */
9232         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9233                 goto nla_put_failure;
9234
9235         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9236                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9237                                NL80211_REGDOM_TYPE_WORLD))
9238                         goto nla_put_failure;
9239         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9240                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9241                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9242                         goto nla_put_failure;
9243         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9244                    request->intersect) {
9245                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9246                                NL80211_REGDOM_TYPE_INTERSECTION))
9247                         goto nla_put_failure;
9248         } else {
9249                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9250                                NL80211_REGDOM_TYPE_COUNTRY) ||
9251                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9252                                    request->alpha2))
9253                         goto nla_put_failure;
9254         }
9255
9256         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9257             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9258                 goto nla_put_failure;
9259
9260         genlmsg_end(msg, hdr);
9261
9262         rcu_read_lock();
9263         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9264                                 GFP_ATOMIC);
9265         rcu_read_unlock();
9266
9267         return;
9268
9269 nla_put_failure:
9270         genlmsg_cancel(msg, hdr);
9271         nlmsg_free(msg);
9272 }
9273
9274 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9275                                     struct net_device *netdev,
9276                                     const u8 *buf, size_t len,
9277                                     enum nl80211_commands cmd, gfp_t gfp)
9278 {
9279         struct sk_buff *msg;
9280         void *hdr;
9281
9282         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9283         if (!msg)
9284                 return;
9285
9286         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9287         if (!hdr) {
9288                 nlmsg_free(msg);
9289                 return;
9290         }
9291
9292         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9293             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9294             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9295                 goto nla_put_failure;
9296
9297         genlmsg_end(msg, hdr);
9298
9299         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9300                                 nl80211_mlme_mcgrp.id, gfp);
9301         return;
9302
9303  nla_put_failure:
9304         genlmsg_cancel(msg, hdr);
9305         nlmsg_free(msg);
9306 }
9307
9308 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9309                           struct net_device *netdev, const u8 *buf,
9310                           size_t len, gfp_t gfp)
9311 {
9312         nl80211_send_mlme_event(rdev, netdev, buf, len,
9313                                 NL80211_CMD_AUTHENTICATE, gfp);
9314 }
9315
9316 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9317                            struct net_device *netdev, const u8 *buf,
9318                            size_t len, gfp_t gfp)
9319 {
9320         nl80211_send_mlme_event(rdev, netdev, buf, len,
9321                                 NL80211_CMD_ASSOCIATE, gfp);
9322 }
9323
9324 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9325                          struct net_device *netdev, const u8 *buf,
9326                          size_t len, gfp_t gfp)
9327 {
9328         nl80211_send_mlme_event(rdev, netdev, buf, len,
9329                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9330 }
9331
9332 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9333                            struct net_device *netdev, const u8 *buf,
9334                            size_t len, gfp_t gfp)
9335 {
9336         nl80211_send_mlme_event(rdev, netdev, buf, len,
9337                                 NL80211_CMD_DISASSOCIATE, gfp);
9338 }
9339
9340 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
9341                                  size_t len)
9342 {
9343         struct wireless_dev *wdev = dev->ieee80211_ptr;
9344         struct wiphy *wiphy = wdev->wiphy;
9345         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9346
9347         trace_cfg80211_send_unprot_deauth(dev);
9348         nl80211_send_mlme_event(rdev, dev, buf, len,
9349                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, GFP_ATOMIC);
9350 }
9351 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
9352
9353 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
9354                                    size_t len)
9355 {
9356         struct wireless_dev *wdev = dev->ieee80211_ptr;
9357         struct wiphy *wiphy = wdev->wiphy;
9358         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9359
9360         trace_cfg80211_send_unprot_disassoc(dev);
9361         nl80211_send_mlme_event(rdev, dev, buf, len,
9362                                 NL80211_CMD_UNPROT_DISASSOCIATE, GFP_ATOMIC);
9363 }
9364 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
9365
9366 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9367                                       struct net_device *netdev, int cmd,
9368                                       const u8 *addr, gfp_t gfp)
9369 {
9370         struct sk_buff *msg;
9371         void *hdr;
9372
9373         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9374         if (!msg)
9375                 return;
9376
9377         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9378         if (!hdr) {
9379                 nlmsg_free(msg);
9380                 return;
9381         }
9382
9383         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9384             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9385             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9386             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9387                 goto nla_put_failure;
9388
9389         genlmsg_end(msg, hdr);
9390
9391         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9392                                 nl80211_mlme_mcgrp.id, gfp);
9393         return;
9394
9395  nla_put_failure:
9396         genlmsg_cancel(msg, hdr);
9397         nlmsg_free(msg);
9398 }
9399
9400 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9401                                struct net_device *netdev, const u8 *addr,
9402                                gfp_t gfp)
9403 {
9404         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9405                                   addr, gfp);
9406 }
9407
9408 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9409                                 struct net_device *netdev, const u8 *addr,
9410                                 gfp_t gfp)
9411 {
9412         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9413                                   addr, gfp);
9414 }
9415
9416 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9417                                  struct net_device *netdev, const u8 *bssid,
9418                                  const u8 *req_ie, size_t req_ie_len,
9419                                  const u8 *resp_ie, size_t resp_ie_len,
9420                                  u16 status, gfp_t gfp)
9421 {
9422         struct sk_buff *msg;
9423         void *hdr;
9424
9425         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9426         if (!msg)
9427                 return;
9428
9429         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9430         if (!hdr) {
9431                 nlmsg_free(msg);
9432                 return;
9433         }
9434
9435         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9436             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9437             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9438             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9439             (req_ie &&
9440              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9441             (resp_ie &&
9442              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9443                 goto nla_put_failure;
9444
9445         genlmsg_end(msg, hdr);
9446
9447         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9448                                 nl80211_mlme_mcgrp.id, gfp);
9449         return;
9450
9451  nla_put_failure:
9452         genlmsg_cancel(msg, hdr);
9453         nlmsg_free(msg);
9454
9455 }
9456
9457 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9458                          struct net_device *netdev, const u8 *bssid,
9459                          const u8 *req_ie, size_t req_ie_len,
9460                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9461 {
9462         struct sk_buff *msg;
9463         void *hdr;
9464
9465         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9466         if (!msg)
9467                 return;
9468
9469         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9470         if (!hdr) {
9471                 nlmsg_free(msg);
9472                 return;
9473         }
9474
9475         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9476             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9477             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9478             (req_ie &&
9479              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9480             (resp_ie &&
9481              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9482                 goto nla_put_failure;
9483
9484         genlmsg_end(msg, hdr);
9485
9486         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9487                                 nl80211_mlme_mcgrp.id, gfp);
9488         return;
9489
9490  nla_put_failure:
9491         genlmsg_cancel(msg, hdr);
9492         nlmsg_free(msg);
9493
9494 }
9495
9496 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9497                                struct net_device *netdev, u16 reason,
9498                                const u8 *ie, size_t ie_len, bool from_ap)
9499 {
9500         struct sk_buff *msg;
9501         void *hdr;
9502
9503         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9504         if (!msg)
9505                 return;
9506
9507         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9508         if (!hdr) {
9509                 nlmsg_free(msg);
9510                 return;
9511         }
9512
9513         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9514             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9515             (from_ap && reason &&
9516              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9517             (from_ap &&
9518              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9519             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9520                 goto nla_put_failure;
9521
9522         genlmsg_end(msg, hdr);
9523
9524         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9525                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9526         return;
9527
9528  nla_put_failure:
9529         genlmsg_cancel(msg, hdr);
9530         nlmsg_free(msg);
9531
9532 }
9533
9534 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9535                              struct net_device *netdev, const u8 *bssid,
9536                              gfp_t gfp)
9537 {
9538         struct sk_buff *msg;
9539         void *hdr;
9540
9541         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9542         if (!msg)
9543                 return;
9544
9545         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9546         if (!hdr) {
9547                 nlmsg_free(msg);
9548                 return;
9549         }
9550
9551         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9552             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9553             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9554                 goto nla_put_failure;
9555
9556         genlmsg_end(msg, hdr);
9557
9558         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9559                                 nl80211_mlme_mcgrp.id, gfp);
9560         return;
9561
9562  nla_put_failure:
9563         genlmsg_cancel(msg, hdr);
9564         nlmsg_free(msg);
9565 }
9566
9567 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9568                                         const u8* ie, u8 ie_len, gfp_t gfp)
9569 {
9570         struct wireless_dev *wdev = dev->ieee80211_ptr;
9571         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9572         struct sk_buff *msg;
9573         void *hdr;
9574
9575         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9576                 return;
9577
9578         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9579
9580         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9581         if (!msg)
9582                 return;
9583
9584         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9585         if (!hdr) {
9586                 nlmsg_free(msg);
9587                 return;
9588         }
9589
9590         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9591             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9592             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9593             (ie_len && ie &&
9594              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9595                 goto nla_put_failure;
9596
9597         genlmsg_end(msg, hdr);
9598
9599         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9600                                 nl80211_mlme_mcgrp.id, gfp);
9601         return;
9602
9603  nla_put_failure:
9604         genlmsg_cancel(msg, hdr);
9605         nlmsg_free(msg);
9606 }
9607 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9608
9609 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9610                                  struct net_device *netdev, const u8 *addr,
9611                                  enum nl80211_key_type key_type, int key_id,
9612                                  const u8 *tsc, gfp_t gfp)
9613 {
9614         struct sk_buff *msg;
9615         void *hdr;
9616
9617         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9618         if (!msg)
9619                 return;
9620
9621         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9622         if (!hdr) {
9623                 nlmsg_free(msg);
9624                 return;
9625         }
9626
9627         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9628             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9629             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9630             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9631             (key_id != -1 &&
9632              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9633             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9634                 goto nla_put_failure;
9635
9636         genlmsg_end(msg, hdr);
9637
9638         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9639                                 nl80211_mlme_mcgrp.id, gfp);
9640         return;
9641
9642  nla_put_failure:
9643         genlmsg_cancel(msg, hdr);
9644         nlmsg_free(msg);
9645 }
9646
9647 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9648                                     struct ieee80211_channel *channel_before,
9649                                     struct ieee80211_channel *channel_after)
9650 {
9651         struct sk_buff *msg;
9652         void *hdr;
9653         struct nlattr *nl_freq;
9654
9655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9656         if (!msg)
9657                 return;
9658
9659         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9660         if (!hdr) {
9661                 nlmsg_free(msg);
9662                 return;
9663         }
9664
9665         /*
9666          * Since we are applying the beacon hint to a wiphy we know its
9667          * wiphy_idx is valid
9668          */
9669         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9670                 goto nla_put_failure;
9671
9672         /* Before */
9673         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9674         if (!nl_freq)
9675                 goto nla_put_failure;
9676         if (nl80211_msg_put_channel(msg, channel_before, false))
9677                 goto nla_put_failure;
9678         nla_nest_end(msg, nl_freq);
9679
9680         /* After */
9681         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9682         if (!nl_freq)
9683                 goto nla_put_failure;
9684         if (nl80211_msg_put_channel(msg, channel_after, false))
9685                 goto nla_put_failure;
9686         nla_nest_end(msg, nl_freq);
9687
9688         genlmsg_end(msg, hdr);
9689
9690         rcu_read_lock();
9691         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9692                                 GFP_ATOMIC);
9693         rcu_read_unlock();
9694
9695         return;
9696
9697 nla_put_failure:
9698         genlmsg_cancel(msg, hdr);
9699         nlmsg_free(msg);
9700 }
9701
9702 static void nl80211_send_remain_on_chan_event(
9703         int cmd, struct cfg80211_registered_device *rdev,
9704         struct wireless_dev *wdev, u64 cookie,
9705         struct ieee80211_channel *chan,
9706         unsigned int duration, gfp_t gfp)
9707 {
9708         struct sk_buff *msg;
9709         void *hdr;
9710
9711         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9712         if (!msg)
9713                 return;
9714
9715         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9716         if (!hdr) {
9717                 nlmsg_free(msg);
9718                 return;
9719         }
9720
9721         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9722             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9723                                          wdev->netdev->ifindex)) ||
9724             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9725             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9726             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9727                         NL80211_CHAN_NO_HT) ||
9728             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9729                 goto nla_put_failure;
9730
9731         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9732             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9733                 goto nla_put_failure;
9734
9735         genlmsg_end(msg, hdr);
9736
9737         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9738                                 nl80211_mlme_mcgrp.id, gfp);
9739         return;
9740
9741  nla_put_failure:
9742         genlmsg_cancel(msg, hdr);
9743         nlmsg_free(msg);
9744 }
9745
9746 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9747                                struct ieee80211_channel *chan,
9748                                unsigned int duration, gfp_t gfp)
9749 {
9750         struct wiphy *wiphy = wdev->wiphy;
9751         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9752
9753         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9754         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9755                                           rdev, wdev, cookie, chan,
9756                                           duration, gfp);
9757 }
9758 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9759
9760 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9761                                         struct ieee80211_channel *chan,
9762                                         gfp_t gfp)
9763 {
9764         struct wiphy *wiphy = wdev->wiphy;
9765         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9766
9767         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9768         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9769                                           rdev, wdev, cookie, chan, 0, gfp);
9770 }
9771 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9772
9773 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9774                       struct station_info *sinfo, gfp_t gfp)
9775 {
9776         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9777         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9778         struct sk_buff *msg;
9779
9780         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9781
9782         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9783         if (!msg)
9784                 return;
9785
9786         if (nl80211_send_station(msg, 0, 0, 0,
9787                                  rdev, dev, mac_addr, sinfo) < 0) {
9788                 nlmsg_free(msg);
9789                 return;
9790         }
9791
9792         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9793                                 nl80211_mlme_mcgrp.id, gfp);
9794 }
9795 EXPORT_SYMBOL(cfg80211_new_sta);
9796
9797 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9798 {
9799         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9800         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9801         struct sk_buff *msg;
9802         void *hdr;
9803
9804         trace_cfg80211_del_sta(dev, mac_addr);
9805
9806         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9807         if (!msg)
9808                 return;
9809
9810         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9811         if (!hdr) {
9812                 nlmsg_free(msg);
9813                 return;
9814         }
9815
9816         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9817             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9818                 goto nla_put_failure;
9819
9820         genlmsg_end(msg, hdr);
9821
9822         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9823                                 nl80211_mlme_mcgrp.id, gfp);
9824         return;
9825
9826  nla_put_failure:
9827         genlmsg_cancel(msg, hdr);
9828         nlmsg_free(msg);
9829 }
9830 EXPORT_SYMBOL(cfg80211_del_sta);
9831
9832 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9833                           enum nl80211_connect_failed_reason reason,
9834                           gfp_t gfp)
9835 {
9836         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9837         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9838         struct sk_buff *msg;
9839         void *hdr;
9840
9841         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9842         if (!msg)
9843                 return;
9844
9845         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9846         if (!hdr) {
9847                 nlmsg_free(msg);
9848                 return;
9849         }
9850
9851         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9852             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9853             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9854                 goto nla_put_failure;
9855
9856         genlmsg_end(msg, hdr);
9857
9858         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9859                                 nl80211_mlme_mcgrp.id, gfp);
9860         return;
9861
9862  nla_put_failure:
9863         genlmsg_cancel(msg, hdr);
9864         nlmsg_free(msg);
9865 }
9866 EXPORT_SYMBOL(cfg80211_conn_failed);
9867
9868 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9869                                        const u8 *addr, gfp_t gfp)
9870 {
9871         struct wireless_dev *wdev = dev->ieee80211_ptr;
9872         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9873         struct sk_buff *msg;
9874         void *hdr;
9875         int err;
9876         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9877
9878         if (!nlportid)
9879                 return false;
9880
9881         msg = nlmsg_new(100, gfp);
9882         if (!msg)
9883                 return true;
9884
9885         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9886         if (!hdr) {
9887                 nlmsg_free(msg);
9888                 return true;
9889         }
9890
9891         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9892             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9893             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9894                 goto nla_put_failure;
9895
9896         err = genlmsg_end(msg, hdr);
9897         if (err < 0) {
9898                 nlmsg_free(msg);
9899                 return true;
9900         }
9901
9902         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9903         return true;
9904
9905  nla_put_failure:
9906         genlmsg_cancel(msg, hdr);
9907         nlmsg_free(msg);
9908         return true;
9909 }
9910
9911 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9912                                 const u8 *addr, gfp_t gfp)
9913 {
9914         struct wireless_dev *wdev = dev->ieee80211_ptr;
9915         bool ret;
9916
9917         trace_cfg80211_rx_spurious_frame(dev, addr);
9918
9919         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9920                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9921                 trace_cfg80211_return_bool(false);
9922                 return false;
9923         }
9924         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9925                                          addr, gfp);
9926         trace_cfg80211_return_bool(ret);
9927         return ret;
9928 }
9929 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9930
9931 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9932                                         const u8 *addr, gfp_t gfp)
9933 {
9934         struct wireless_dev *wdev = dev->ieee80211_ptr;
9935         bool ret;
9936
9937         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9938
9939         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9940                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9941                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9942                 trace_cfg80211_return_bool(false);
9943                 return false;
9944         }
9945         ret = __nl80211_unexpected_frame(dev,
9946                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9947                                          addr, gfp);
9948         trace_cfg80211_return_bool(ret);
9949         return ret;
9950 }
9951 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9952
9953 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9954                       struct wireless_dev *wdev, u32 nlportid,
9955                       int freq, int sig_dbm,
9956                       const u8 *buf, size_t len, gfp_t gfp)
9957 {
9958         struct net_device *netdev = wdev->netdev;
9959         struct sk_buff *msg;
9960         void *hdr;
9961
9962         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9963         if (!msg)
9964                 return -ENOMEM;
9965
9966         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9967         if (!hdr) {
9968                 nlmsg_free(msg);
9969                 return -ENOMEM;
9970         }
9971
9972         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9973             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9974                                         netdev->ifindex)) ||
9975             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9976             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9977             (sig_dbm &&
9978              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9979             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9980                 goto nla_put_failure;
9981
9982         genlmsg_end(msg, hdr);
9983
9984         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9985
9986  nla_put_failure:
9987         genlmsg_cancel(msg, hdr);
9988         nlmsg_free(msg);
9989         return -ENOBUFS;
9990 }
9991
9992 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9993                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9994 {
9995         struct wiphy *wiphy = wdev->wiphy;
9996         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9997         struct net_device *netdev = wdev->netdev;
9998         struct sk_buff *msg;
9999         void *hdr;
10000
10001         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10002
10003         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10004         if (!msg)
10005                 return;
10006
10007         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10008         if (!hdr) {
10009                 nlmsg_free(msg);
10010                 return;
10011         }
10012
10013         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10014             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10015                                    netdev->ifindex)) ||
10016             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10017             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10018             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10019             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10020                 goto nla_put_failure;
10021
10022         genlmsg_end(msg, hdr);
10023
10024         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
10025         return;
10026
10027  nla_put_failure:
10028         genlmsg_cancel(msg, hdr);
10029         nlmsg_free(msg);
10030 }
10031 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10032
10033 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10034                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10035                               gfp_t gfp)
10036 {
10037         struct wireless_dev *wdev = dev->ieee80211_ptr;
10038         struct wiphy *wiphy = wdev->wiphy;
10039         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10040         struct sk_buff *msg;
10041         struct nlattr *pinfoattr;
10042         void *hdr;
10043
10044         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10045
10046         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10047         if (!msg)
10048                 return;
10049
10050         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10051         if (!hdr) {
10052                 nlmsg_free(msg);
10053                 return;
10054         }
10055
10056         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10057             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10058                 goto nla_put_failure;
10059
10060         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10061         if (!pinfoattr)
10062                 goto nla_put_failure;
10063
10064         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10065                         rssi_event))
10066                 goto nla_put_failure;
10067
10068         nla_nest_end(msg, pinfoattr);
10069
10070         genlmsg_end(msg, hdr);
10071
10072         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10073                                 nl80211_mlme_mcgrp.id, gfp);
10074         return;
10075
10076  nla_put_failure:
10077         genlmsg_cancel(msg, hdr);
10078         nlmsg_free(msg);
10079 }
10080 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10081
10082 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10083                                      struct net_device *netdev, const u8 *bssid,
10084                                      const u8 *replay_ctr, gfp_t gfp)
10085 {
10086         struct sk_buff *msg;
10087         struct nlattr *rekey_attr;
10088         void *hdr;
10089
10090         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10091         if (!msg)
10092                 return;
10093
10094         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10095         if (!hdr) {
10096                 nlmsg_free(msg);
10097                 return;
10098         }
10099
10100         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10101             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10102             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10103                 goto nla_put_failure;
10104
10105         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10106         if (!rekey_attr)
10107                 goto nla_put_failure;
10108
10109         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10110                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10111                 goto nla_put_failure;
10112
10113         nla_nest_end(msg, rekey_attr);
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_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10127                                const u8 *replay_ctr, gfp_t gfp)
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_gtk_rekey_notify(dev, bssid);
10134         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10135 }
10136 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10137
10138 static void
10139 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10140                                struct net_device *netdev, int index,
10141                                const u8 *bssid, bool preauth, gfp_t gfp)
10142 {
10143         struct sk_buff *msg;
10144         struct nlattr *attr;
10145         void *hdr;
10146
10147         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10148         if (!msg)
10149                 return;
10150
10151         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10152         if (!hdr) {
10153                 nlmsg_free(msg);
10154                 return;
10155         }
10156
10157         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10158             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10159                 goto nla_put_failure;
10160
10161         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10162         if (!attr)
10163                 goto nla_put_failure;
10164
10165         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10166             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10167             (preauth &&
10168              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10169                 goto nla_put_failure;
10170
10171         nla_nest_end(msg, attr);
10172
10173         genlmsg_end(msg, hdr);
10174
10175         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10176                                 nl80211_mlme_mcgrp.id, gfp);
10177         return;
10178
10179  nla_put_failure:
10180         genlmsg_cancel(msg, hdr);
10181         nlmsg_free(msg);
10182 }
10183
10184 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10185                                      const u8 *bssid, bool preauth, gfp_t gfp)
10186 {
10187         struct wireless_dev *wdev = dev->ieee80211_ptr;
10188         struct wiphy *wiphy = wdev->wiphy;
10189         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10190
10191         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10192         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10193 }
10194 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10195
10196 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10197                                      struct net_device *netdev,
10198                                      struct cfg80211_chan_def *chandef,
10199                                      gfp_t gfp)
10200 {
10201         struct sk_buff *msg;
10202         void *hdr;
10203
10204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10205         if (!msg)
10206                 return;
10207
10208         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10209         if (!hdr) {
10210                 nlmsg_free(msg);
10211                 return;
10212         }
10213
10214         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10215                 goto nla_put_failure;
10216
10217         if (nl80211_send_chandef(msg, chandef))
10218                 goto nla_put_failure;
10219
10220         genlmsg_end(msg, hdr);
10221
10222         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10223                                 nl80211_mlme_mcgrp.id, gfp);
10224         return;
10225
10226  nla_put_failure:
10227         genlmsg_cancel(msg, hdr);
10228         nlmsg_free(msg);
10229 }
10230
10231 void cfg80211_ch_switch_notify(struct net_device *dev,
10232                                struct cfg80211_chan_def *chandef)
10233 {
10234         struct wireless_dev *wdev = dev->ieee80211_ptr;
10235         struct wiphy *wiphy = wdev->wiphy;
10236         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10237
10238         trace_cfg80211_ch_switch_notify(dev, chandef);
10239
10240         wdev_lock(wdev);
10241
10242         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10243                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10244                 goto out;
10245
10246         wdev->channel = chandef->chan;
10247         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10248 out:
10249         wdev_unlock(wdev);
10250         return;
10251 }
10252 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10253
10254 void cfg80211_cqm_txe_notify(struct net_device *dev,
10255                              const u8 *peer, u32 num_packets,
10256                              u32 rate, u32 intvl, gfp_t gfp)
10257 {
10258         struct wireless_dev *wdev = dev->ieee80211_ptr;
10259         struct wiphy *wiphy = wdev->wiphy;
10260         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10261         struct sk_buff *msg;
10262         struct nlattr *pinfoattr;
10263         void *hdr;
10264
10265         msg = nlmsg_new(NLMSG_GOODSIZE, 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_TXE_PKTS, num_packets))
10285                 goto nla_put_failure;
10286
10287         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10288                 goto nla_put_failure;
10289
10290         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10291                 goto nla_put_failure;
10292
10293         nla_nest_end(msg, pinfoattr);
10294
10295         genlmsg_end(msg, hdr);
10296
10297         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10298                                 nl80211_mlme_mcgrp.id, gfp);
10299         return;
10300
10301  nla_put_failure:
10302         genlmsg_cancel(msg, hdr);
10303         nlmsg_free(msg);
10304 }
10305 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10306
10307 void
10308 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10309                      struct cfg80211_chan_def *chandef,
10310                      enum nl80211_radar_event event,
10311                      struct net_device *netdev, gfp_t gfp)
10312 {
10313         struct sk_buff *msg;
10314         void *hdr;
10315
10316         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10317         if (!msg)
10318                 return;
10319
10320         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10321         if (!hdr) {
10322                 nlmsg_free(msg);
10323                 return;
10324         }
10325
10326         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10327                 goto nla_put_failure;
10328
10329         /* NOP and radar events don't need a netdev parameter */
10330         if (netdev) {
10331                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10332
10333                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10334                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10335                         goto nla_put_failure;
10336         }
10337
10338         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10339                 goto nla_put_failure;
10340
10341         if (nl80211_send_chandef(msg, chandef))
10342                 goto nla_put_failure;
10343
10344         if (genlmsg_end(msg, hdr) < 0) {
10345                 nlmsg_free(msg);
10346                 return;
10347         }
10348
10349         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10350                                 nl80211_mlme_mcgrp.id, gfp);
10351         return;
10352
10353  nla_put_failure:
10354         genlmsg_cancel(msg, hdr);
10355         nlmsg_free(msg);
10356 }
10357
10358 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10359                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10360 {
10361         struct wireless_dev *wdev = dev->ieee80211_ptr;
10362         struct wiphy *wiphy = wdev->wiphy;
10363         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10364         struct sk_buff *msg;
10365         struct nlattr *pinfoattr;
10366         void *hdr;
10367
10368         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10369
10370         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10371         if (!msg)
10372                 return;
10373
10374         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10375         if (!hdr) {
10376                 nlmsg_free(msg);
10377                 return;
10378         }
10379
10380         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10381             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10382             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10383                 goto nla_put_failure;
10384
10385         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10386         if (!pinfoattr)
10387                 goto nla_put_failure;
10388
10389         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10390                 goto nla_put_failure;
10391
10392         nla_nest_end(msg, pinfoattr);
10393
10394         genlmsg_end(msg, hdr);
10395
10396         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10397                                 nl80211_mlme_mcgrp.id, gfp);
10398         return;
10399
10400  nla_put_failure:
10401         genlmsg_cancel(msg, hdr);
10402         nlmsg_free(msg);
10403 }
10404 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10405
10406 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10407                            u64 cookie, bool acked, gfp_t gfp)
10408 {
10409         struct wireless_dev *wdev = dev->ieee80211_ptr;
10410         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10411         struct sk_buff *msg;
10412         void *hdr;
10413         int err;
10414
10415         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10416
10417         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10418
10419         if (!msg)
10420                 return;
10421
10422         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10423         if (!hdr) {
10424                 nlmsg_free(msg);
10425                 return;
10426         }
10427
10428         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10429             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10430             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10431             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10432             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10433                 goto nla_put_failure;
10434
10435         err = genlmsg_end(msg, hdr);
10436         if (err < 0) {
10437                 nlmsg_free(msg);
10438                 return;
10439         }
10440
10441         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10442                                 nl80211_mlme_mcgrp.id, gfp);
10443         return;
10444
10445  nla_put_failure:
10446         genlmsg_cancel(msg, hdr);
10447         nlmsg_free(msg);
10448 }
10449 EXPORT_SYMBOL(cfg80211_probe_status);
10450
10451 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10452                                  const u8 *frame, size_t len,
10453                                  int freq, int sig_dbm)
10454 {
10455         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10456         struct sk_buff *msg;
10457         void *hdr;
10458         struct cfg80211_beacon_registration *reg;
10459
10460         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10461
10462         spin_lock_bh(&rdev->beacon_registrations_lock);
10463         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10464                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10465                 if (!msg) {
10466                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10467                         return;
10468                 }
10469
10470                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10471                 if (!hdr)
10472                         goto nla_put_failure;
10473
10474                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10475                     (freq &&
10476                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10477                     (sig_dbm &&
10478                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10479                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10480                         goto nla_put_failure;
10481
10482                 genlmsg_end(msg, hdr);
10483
10484                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10485         }
10486         spin_unlock_bh(&rdev->beacon_registrations_lock);
10487         return;
10488
10489  nla_put_failure:
10490         spin_unlock_bh(&rdev->beacon_registrations_lock);
10491         if (hdr)
10492                 genlmsg_cancel(msg, hdr);
10493         nlmsg_free(msg);
10494 }
10495 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10496
10497 #ifdef CONFIG_PM
10498 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10499                                    struct cfg80211_wowlan_wakeup *wakeup,
10500                                    gfp_t gfp)
10501 {
10502         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10503         struct sk_buff *msg;
10504         void *hdr;
10505         int err, size = 200;
10506
10507         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10508
10509         if (wakeup)
10510                 size += wakeup->packet_present_len;
10511
10512         msg = nlmsg_new(size, gfp);
10513         if (!msg)
10514                 return;
10515
10516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10517         if (!hdr)
10518                 goto free_msg;
10519
10520         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10521             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10522                 goto free_msg;
10523
10524         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10525                                         wdev->netdev->ifindex))
10526                 goto free_msg;
10527
10528         if (wakeup) {
10529                 struct nlattr *reasons;
10530
10531                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10532
10533                 if (wakeup->disconnect &&
10534                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10535                         goto free_msg;
10536                 if (wakeup->magic_pkt &&
10537                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10538                         goto free_msg;
10539                 if (wakeup->gtk_rekey_failure &&
10540                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10541                         goto free_msg;
10542                 if (wakeup->eap_identity_req &&
10543                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10544                         goto free_msg;
10545                 if (wakeup->four_way_handshake &&
10546                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10547                         goto free_msg;
10548                 if (wakeup->rfkill_release &&
10549                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10550                         goto free_msg;
10551
10552                 if (wakeup->pattern_idx >= 0 &&
10553                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10554                                 wakeup->pattern_idx))
10555                         goto free_msg;
10556
10557                 if (wakeup->tcp_match)
10558                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10559
10560                 if (wakeup->tcp_connlost)
10561                         nla_put_flag(msg,
10562                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10563
10564                 if (wakeup->tcp_nomoretokens)
10565                         nla_put_flag(msg,
10566                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10567
10568                 if (wakeup->packet) {
10569                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10570                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10571
10572                         if (!wakeup->packet_80211) {
10573                                 pkt_attr =
10574                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10575                                 len_attr =
10576                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10577                         }
10578
10579                         if (wakeup->packet_len &&
10580                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10581                                 goto free_msg;
10582
10583                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10584                                     wakeup->packet))
10585                                 goto free_msg;
10586                 }
10587
10588                 nla_nest_end(msg, reasons);
10589         }
10590
10591         err = genlmsg_end(msg, hdr);
10592         if (err < 0)
10593                 goto free_msg;
10594
10595         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10596                                 nl80211_mlme_mcgrp.id, gfp);
10597         return;
10598
10599  free_msg:
10600         nlmsg_free(msg);
10601 }
10602 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10603 #endif
10604
10605 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10606                                 enum nl80211_tdls_operation oper,
10607                                 u16 reason_code, gfp_t gfp)
10608 {
10609         struct wireless_dev *wdev = dev->ieee80211_ptr;
10610         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10611         struct sk_buff *msg;
10612         void *hdr;
10613         int err;
10614
10615         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10616                                          reason_code);
10617
10618         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10619         if (!msg)
10620                 return;
10621
10622         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10623         if (!hdr) {
10624                 nlmsg_free(msg);
10625                 return;
10626         }
10627
10628         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10629             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10630             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10631             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10632             (reason_code > 0 &&
10633              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10634                 goto nla_put_failure;
10635
10636         err = genlmsg_end(msg, hdr);
10637         if (err < 0) {
10638                 nlmsg_free(msg);
10639                 return;
10640         }
10641
10642         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10643                                 nl80211_mlme_mcgrp.id, gfp);
10644         return;
10645
10646  nla_put_failure:
10647         genlmsg_cancel(msg, hdr);
10648         nlmsg_free(msg);
10649 }
10650 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10651
10652 static int nl80211_netlink_notify(struct notifier_block * nb,
10653                                   unsigned long state,
10654                                   void *_notify)
10655 {
10656         struct netlink_notify *notify = _notify;
10657         struct cfg80211_registered_device *rdev;
10658         struct wireless_dev *wdev;
10659         struct cfg80211_beacon_registration *reg, *tmp;
10660
10661         if (state != NETLINK_URELEASE)
10662                 return NOTIFY_DONE;
10663
10664         rcu_read_lock();
10665
10666         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10667                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10668                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10669
10670                 spin_lock_bh(&rdev->beacon_registrations_lock);
10671                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10672                                          list) {
10673                         if (reg->nlportid == notify->portid) {
10674                                 list_del(&reg->list);
10675                                 kfree(reg);
10676                                 break;
10677                         }
10678                 }
10679                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10680         }
10681
10682         rcu_read_unlock();
10683
10684         return NOTIFY_DONE;
10685 }
10686
10687 static struct notifier_block nl80211_netlink_notifier = {
10688         .notifier_call = nl80211_netlink_notify,
10689 };
10690
10691 void cfg80211_ft_event(struct net_device *netdev,
10692                        struct cfg80211_ft_event_params *ft_event)
10693 {
10694         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10695         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10696         struct sk_buff *msg;
10697         void *hdr;
10698         int err;
10699
10700         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10701
10702         if (!ft_event->target_ap)
10703                 return;
10704
10705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10706         if (!msg)
10707                 return;
10708
10709         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10710         if (!hdr) {
10711                 nlmsg_free(msg);
10712                 return;
10713         }
10714
10715         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10716         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10717         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10718         if (ft_event->ies)
10719                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10720         if (ft_event->ric_ies)
10721                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10722                         ft_event->ric_ies);
10723
10724         err = genlmsg_end(msg, hdr);
10725         if (err < 0) {
10726                 nlmsg_free(msg);
10727                 return;
10728         }
10729
10730         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10731                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10732 }
10733 EXPORT_SYMBOL(cfg80211_ft_event);
10734
10735 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
10736 {
10737         struct cfg80211_registered_device *rdev;
10738         struct sk_buff *msg;
10739         void *hdr;
10740         u32 nlportid;
10741
10742         rdev = wiphy_to_dev(wdev->wiphy);
10743         if (!rdev->crit_proto_nlportid)
10744                 return;
10745
10746         nlportid = rdev->crit_proto_nlportid;
10747         rdev->crit_proto_nlportid = 0;
10748
10749         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10750         if (!msg)
10751                 return;
10752
10753         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
10754         if (!hdr)
10755                 goto nla_put_failure;
10756
10757         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10758             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10759                 goto nla_put_failure;
10760
10761         genlmsg_end(msg, hdr);
10762
10763         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10764         return;
10765
10766  nla_put_failure:
10767         if (hdr)
10768                 genlmsg_cancel(msg, hdr);
10769         nlmsg_free(msg);
10770
10771 }
10772 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
10773
10774 /* initialisation/exit functions */
10775
10776 int nl80211_init(void)
10777 {
10778         int err;
10779
10780         err = genl_register_family_with_ops(&nl80211_fam,
10781                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10782         if (err)
10783                 return err;
10784
10785         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10786         if (err)
10787                 goto err_out;
10788
10789         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10790         if (err)
10791                 goto err_out;
10792
10793         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10794         if (err)
10795                 goto err_out;
10796
10797         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10798         if (err)
10799                 goto err_out;
10800
10801 #ifdef CONFIG_NL80211_TESTMODE
10802         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10803         if (err)
10804                 goto err_out;
10805 #endif
10806
10807         err = netlink_register_notifier(&nl80211_netlink_notifier);
10808         if (err)
10809                 goto err_out;
10810
10811         return 0;
10812  err_out:
10813         genl_unregister_family(&nl80211_fam);
10814         return err;
10815 }
10816
10817 void nl80211_exit(void)
10818 {
10819         netlink_unregister_notifier(&nl80211_netlink_notifier);
10820         genl_unregister_family(&nl80211_fam);
10821 }