net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25 #include "rdev-ops.h"
  26
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* returns ERR_PTR values */
  50 static struct wireless_dev *
  51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  52 {
  53         struct cfg80211_registered_device *rdev;
  54         struct wireless_dev *result = NULL;
  55         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  56         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  57         u64 wdev_id;
  58         int wiphy_idx = -1;
  59         int ifidx = -1;
  60
  61         assert_cfg80211_lock();
  62
  63         if (!have_ifidx && !have_wdev_id)
  64                 return ERR_PTR(-EINVAL);
  65
  66         if (have_ifidx)
  67                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  68         if (have_wdev_id) {
  69                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  70                 wiphy_idx = wdev_id >> 32;
  71         }
  72
  73         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  74                 struct wireless_dev *wdev;
  75
  76                 if (wiphy_net(&rdev->wiphy) != netns)
  77                         continue;
  78
  79                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  80                         continue;
  81
  82                 mutex_lock(&rdev->devlist_mtx);
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94                 mutex_unlock(&rdev->devlist_mtx);
  95
  96                 if (result)
  97                         break;
  98         }
  99
 100         if (result)
 101                 return result;
 102         return ERR_PTR(-ENODEV);
 103 }
 104
 105 static struct cfg80211_registered_device *
 106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 107 {
 108         struct cfg80211_registered_device *rdev = NULL, *tmp;
 109         struct net_device *netdev;
 110
 111         assert_cfg80211_lock();
 112
 113         if (!attrs[NL80211_ATTR_WIPHY] &&
 114             !attrs[NL80211_ATTR_IFINDEX] &&
 115             !attrs[NL80211_ATTR_WDEV])
 116                 return ERR_PTR(-EINVAL);
 117
 118         if (attrs[NL80211_ATTR_WIPHY])
 119                 rdev = cfg80211_rdev_by_wiphy_idx(
 120                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 121
 122         if (attrs[NL80211_ATTR_WDEV]) {
 123                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 124                 struct wireless_dev *wdev;
 125                 bool found = false;
 126
 127                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 128                 if (tmp) {
 129                         /* make sure wdev exists */
 130                         mutex_lock(&tmp->devlist_mtx);
 131                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 132                                 if (wdev->identifier != (u32)wdev_id)
 133                                         continue;
 134                                 found = true;
 135                                 break;
 136                         }
 137                         mutex_unlock(&tmp->devlist_mtx);
 138
 139                         if (!found)
 140                                 tmp = NULL;
 141
 142                         if (rdev && tmp != rdev)
 143                                 return ERR_PTR(-EINVAL);
 144                         rdev = tmp;
 145                 }
 146         }
 147
 148         if (attrs[NL80211_ATTR_IFINDEX]) {
 149                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 150                 netdev = dev_get_by_index(netns, ifindex);
 151                 if (netdev) {
 152                         if (netdev->ieee80211_ptr)
 153                                 tmp = wiphy_to_dev(
 154                                                 netdev->ieee80211_ptr->wiphy);
 155                         else
 156                                 tmp = NULL;
 157
 158                         dev_put(netdev);
 159
 160                         /* not wireless device -- return error */
 161                         if (!tmp)
 162                                 return ERR_PTR(-EINVAL);
 163
 164                         /* mismatch -- return error */
 165                         if (rdev && tmp != rdev)
 166                                 return ERR_PTR(-EINVAL);
 167
 168                         rdev = tmp;
 169                 }
 170         }
 171
 172         if (!rdev)
 173                 return ERR_PTR(-ENODEV);
 174
 175         if (netns != wiphy_net(&rdev->wiphy))
 176                 return ERR_PTR(-ENODEV);
 177
 178         return rdev;
 179 }
 180
 181 /*
 182  * This function returns a pointer to the driver
 183  * that the genl_info item that is passed refers to.
 184  * If successful, it returns non-NULL and also locks
 185  * the driver's mutex!
 186  *
 187  * This means that you need to call cfg80211_unlock_rdev()
 188  * before being allowed to acquire &cfg80211_mutex!
 189  *
 190  * This is necessary because we need to lock the global
 191  * mutex to get an item off the list safely, and then
 192  * we lock the rdev mutex so it doesn't go away under us.
 193  *
 194  * We don't want to keep cfg80211_mutex locked
 195  * for all the time in order to allow requests on
 196  * other interfaces to go through at the same time.
 197  *
 198  * The result of this can be a PTR_ERR and hence must
 199  * be checked with IS_ERR() for errors.
 200  */
 201 static struct cfg80211_registered_device *
 202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 203 {
 204         struct cfg80211_registered_device *rdev;
 205
 206         mutex_lock(&cfg80211_mutex);
 207         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 208
 209         /* if it is not an error we grab the lock on
 210          * it to assure it won't be going away while
 211          * we operate on it */
 212         if (!IS_ERR(rdev))
 213                 mutex_lock(&rdev->mtx);
 214
 215         mutex_unlock(&cfg80211_mutex);
 216
 217         return rdev;
 218 }
 219
 220 /* policy for the attributes */
 221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 222         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 223         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 224                                       .len = 20-1 },
 225         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 226
 227         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 229         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 232
 233         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 234         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 236         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 238
 239         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 240         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 242
 243         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 244         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 245
 246         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 247         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 248                                     .len = WLAN_MAX_KEY_LEN },
 249         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 250         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 251         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 252         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 253         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 256         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 257         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 258                                        .len = IEEE80211_MAX_DATA_LEN },
 259         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 260                                        .len = IEEE80211_MAX_DATA_LEN },
 261         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 262         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 264         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 265                                                .len = NL80211_MAX_SUPP_RATES },
 266         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 267         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 268         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 269         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 270                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 271         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 272
 273         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 274         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 277         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 280                                            .len = NL80211_MAX_SUPP_RATES },
 281         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 282
 283         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 285
 286         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 287
 288         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 289         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 290                               .len = IEEE80211_MAX_DATA_LEN },
 291         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 292         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 293
 294         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 295                                 .len = IEEE80211_MAX_SSID_LEN },
 296         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 297         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_STA_FLAGS2] = {
 302                 .len = sizeof(struct nl80211_sta_flag_update),
 303         },
 304         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 306         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 307         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 310         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 311         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 312         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 313                                  .len = WLAN_PMKID_LEN },
 314         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 315         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 316         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 318                                  .len = IEEE80211_MAX_DATA_LEN },
 319         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 320         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 321         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 322         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 326         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 327         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 330         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 334         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 335         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 338         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 339                                          .len = IEEE80211_MAX_DATA_LEN },
 340         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 341                                          .len = IEEE80211_MAX_DATA_LEN },
 342         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 344         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 346         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 352                                       .len = IEEE80211_MAX_DATA_LEN },
 353         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 354         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 355         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 356                 .len = NL80211_HT_CAPABILITY_LEN
 357         },
 358         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 359         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 360         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 361         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 362         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 363         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 364         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 365         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 366 };
 367
 368 /* policy for the key attributes */
 369 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 370         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 371         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 372         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 373         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 374         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 375         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 376         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 377         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 378 };
 379
 380 /* policy for the key default flags */
 381 static const struct nla_policy
 382 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 383         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 384         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 385 };
 386
 387 /* policy for WoWLAN attributes */
 388 static const struct nla_policy
 389 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 390         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 391         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 392         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 394         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 396         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 398 };
 399
 400 /* policy for GTK rekey offload attributes */
 401 static const struct nla_policy
 402 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 403         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 404         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 405         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 406 };
 407
 408 static const struct nla_policy
 409 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 410         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 411                                                  .len = IEEE80211_MAX_SSID_LEN },
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 413 };
 414
 415 /* ifidx get helper */
 416 static int nl80211_get_ifidx(struct netlink_callback *cb)
 417 {
 418         int res;
 419
 420         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 421                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 422                           nl80211_policy);
 423         if (res)
 424                 return res;
 425
 426         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 427                 return -EINVAL;
 428
 429         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 430         if (!res)
 431                 return -EINVAL;
 432         return res;
 433 }
 434
 435 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 436                                        struct netlink_callback *cb,
 437                                        struct cfg80211_registered_device **rdev,
 438                                        struct net_device **dev)
 439 {
 440         int ifidx = cb->args[0];
 441         int err;
 442
 443         if (!ifidx)
 444                 ifidx = nl80211_get_ifidx(cb);
 445         if (ifidx < 0)
 446                 return ifidx;
 447
 448         cb->args[0] = ifidx;
 449
 450         rtnl_lock();
 451
 452         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 453         if (!*dev) {
 454                 err = -ENODEV;
 455                 goto out_rtnl;
 456         }
 457
 458         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 459         if (IS_ERR(*rdev)) {
 460                 err = PTR_ERR(*rdev);
 461                 goto out_rtnl;
 462         }
 463
 464         return 0;
 465  out_rtnl:
 466         rtnl_unlock();
 467         return err;
 468 }
 469
 470 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 471 {
 472         cfg80211_unlock_rdev(rdev);
 473         rtnl_unlock();
 474 }
 475
 476 /* IE validation */
 477 static bool is_valid_ie_attr(const struct nlattr *attr)
 478 {
 479         const u8 *pos;
 480         int len;
 481
 482         if (!attr)
 483                 return true;
 484
 485         pos = nla_data(attr);
 486         len = nla_len(attr);
 487
 488         while (len) {
 489                 u8 elemlen;
 490
 491                 if (len < 2)
 492                         return false;
 493                 len -= 2;
 494
 495                 elemlen = pos[1];
 496                 if (elemlen > len)
 497                         return false;
 498
 499                 len -= elemlen;
 500                 pos += 2 + elemlen;
 501         }
 502
 503         return true;
 504 }
 505
 506 /* message building helper */
 507 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 508                                    int flags, u8 cmd)
 509 {
 510         /* since there is no private header just add the generic one */
 511         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 512 }
 513
 514 static int nl80211_msg_put_channel(struct sk_buff *msg,
 515                                    struct ieee80211_channel *chan)
 516 {
 517         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 518                         chan->center_freq))
 519                 goto nla_put_failure;
 520
 521         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 522             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 523                 goto nla_put_failure;
 524         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 525             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 526                 goto nla_put_failure;
 527         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 528             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 529                 goto nla_put_failure;
 530         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 531             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 532                 goto nla_put_failure;
 533
 534         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 535                         DBM_TO_MBM(chan->max_power)))
 536                 goto nla_put_failure;
 537
 538         return 0;
 539
 540  nla_put_failure:
 541         return -ENOBUFS;
 542 }
 543
 544 /* netlink command implementations */
 545
 546 struct key_parse {
 547         struct key_params p;
 548         int idx;
 549         int type;
 550         bool def, defmgmt;
 551         bool def_uni, def_multi;
 552 };
 553
 554 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 555 {
 556         struct nlattr *tb[NL80211_KEY_MAX + 1];
 557         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 558                                    nl80211_key_policy);
 559         if (err)
 560                 return err;
 561
 562         k->def = !!tb[NL80211_KEY_DEFAULT];
 563         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 564
 565         if (k->def) {
 566                 k->def_uni = true;
 567                 k->def_multi = true;
 568         }
 569         if (k->defmgmt)
 570                 k->def_multi = true;
 571
 572         if (tb[NL80211_KEY_IDX])
 573                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 574
 575         if (tb[NL80211_KEY_DATA]) {
 576                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 577                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 578         }
 579
 580         if (tb[NL80211_KEY_SEQ]) {
 581                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 582                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 583         }
 584
 585         if (tb[NL80211_KEY_CIPHER])
 586                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 587
 588         if (tb[NL80211_KEY_TYPE]) {
 589                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 590                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 591                         return -EINVAL;
 592         }
 593
 594         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 595                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 596                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 597                                        tb[NL80211_KEY_DEFAULT_TYPES],
 598                                        nl80211_key_default_policy);
 599                 if (err)
 600                         return err;
 601
 602                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 603                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 604         }
 605
 606         return 0;
 607 }
 608
 609 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 610 {
 611         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 612                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 613                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 614         }
 615
 616         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 617                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 618                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 619         }
 620
 621         if (info->attrs[NL80211_ATTR_KEY_IDX])
 622                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 623
 624         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 625                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 626
 627         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 628         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 629
 630         if (k->def) {
 631                 k->def_uni = true;
 632                 k->def_multi = true;
 633         }
 634         if (k->defmgmt)
 635                 k->def_multi = true;
 636
 637         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 638                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 639                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 640                         return -EINVAL;
 641         }
 642
 643         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 644                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 645                 int err = nla_parse_nested(
 646                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 647                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 648                                 nl80211_key_default_policy);
 649                 if (err)
 650                         return err;
 651
 652                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 653                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 654         }
 655
 656         return 0;
 657 }
 658
 659 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 660 {
 661         int err;
 662
 663         memset(k, 0, sizeof(*k));
 664         k->idx = -1;
 665         k->type = -1;
 666
 667         if (info->attrs[NL80211_ATTR_KEY])
 668                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 669         else
 670                 err = nl80211_parse_key_old(info, k);
 671
 672         if (err)
 673                 return err;
 674
 675         if (k->def && k->defmgmt)
 676                 return -EINVAL;
 677
 678         if (k->defmgmt) {
 679                 if (k->def_uni || !k->def_multi)
 680                         return -EINVAL;
 681         }
 682
 683         if (k->idx != -1) {
 684                 if (k->defmgmt) {
 685                         if (k->idx < 4 || k->idx > 5)
 686                                 return -EINVAL;
 687                 } else if (k->def) {
 688                         if (k->idx < 0 || k->idx > 3)
 689                                 return -EINVAL;
 690                 } else {
 691                         if (k->idx < 0 || k->idx > 5)
 692                                 return -EINVAL;
 693                 }
 694         }
 695
 696         return 0;
 697 }
 698
 699 static struct cfg80211_cached_keys *
 700 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 701                        struct nlattr *keys, bool *no_ht)
 702 {
 703         struct key_parse parse;
 704         struct nlattr *key;
 705         struct cfg80211_cached_keys *result;
 706         int rem, err, def = 0;
 707
 708         result = kzalloc(sizeof(*result), GFP_KERNEL);
 709         if (!result)
 710                 return ERR_PTR(-ENOMEM);
 711
 712         result->def = -1;
 713         result->defmgmt = -1;
 714
 715         nla_for_each_nested(key, keys, rem) {
 716                 memset(&parse, 0, sizeof(parse));
 717                 parse.idx = -1;
 718
 719                 err = nl80211_parse_key_new(key, &parse);
 720                 if (err)
 721                         goto error;
 722                 err = -EINVAL;
 723                 if (!parse.p.key)
 724                         goto error;
 725                 if (parse.idx < 0 || parse.idx > 4)
 726                         goto error;
 727                 if (parse.def) {
 728                         if (def)
 729                                 goto error;
 730                         def = 1;
 731                         result->def = parse.idx;
 732                         if (!parse.def_uni || !parse.def_multi)
 733                                 goto error;
 734                 } else if (parse.defmgmt)
 735                         goto error;
 736                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 737                                                      parse.idx, false, NULL);
 738                 if (err)
 739                         goto error;
 740                 result->params[parse.idx].cipher = parse.p.cipher;
 741                 result->params[parse.idx].key_len = parse.p.key_len;
 742                 result->params[parse.idx].key = result->data[parse.idx];
 743                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 744
 745                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 746                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 747                         if (no_ht)
 748                                 *no_ht = true;
 749                 }
 750         }
 751
 752         return result;
 753  error:
 754         kfree(result);
 755         return ERR_PTR(err);
 756 }
 757
 758 static int nl80211_key_allowed(struct wireless_dev *wdev)
 759 {
 760         ASSERT_WDEV_LOCK(wdev);
 761
 762         switch (wdev->iftype) {
 763         case NL80211_IFTYPE_AP:
 764         case NL80211_IFTYPE_AP_VLAN:
 765         case NL80211_IFTYPE_P2P_GO:
 766         case NL80211_IFTYPE_MESH_POINT:
 767                 break;
 768         case NL80211_IFTYPE_ADHOC:
 769                 if (!wdev->current_bss)
 770                         return -ENOLINK;
 771                 break;
 772         case NL80211_IFTYPE_STATION:
 773         case NL80211_IFTYPE_P2P_CLIENT:
 774                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 775                         return -ENOLINK;
 776                 break;
 777         default:
 778                 return -EINVAL;
 779         }
 780
 781         return 0;
 782 }
 783
 784 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 785 {
 786         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 787         int i;
 788
 789         if (!nl_modes)
 790                 goto nla_put_failure;
 791
 792         i = 0;
 793         while (ifmodes) {
 794                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 795                         goto nla_put_failure;
 796                 ifmodes >>= 1;
 797                 i++;
 798         }
 799
 800         nla_nest_end(msg, nl_modes);
 801         return 0;
 802
 803 nla_put_failure:
 804         return -ENOBUFS;
 805 }
 806
 807 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 808                                           struct sk_buff *msg)
 809 {
 810         struct nlattr *nl_combis;
 811         int i, j;
 812
 813         nl_combis = nla_nest_start(msg,
 814                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 815         if (!nl_combis)
 816                 goto nla_put_failure;
 817
 818         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 819                 const struct ieee80211_iface_combination *c;
 820                 struct nlattr *nl_combi, *nl_limits;
 821
 822                 c = &wiphy->iface_combinations[i];
 823
 824                 nl_combi = nla_nest_start(msg, i + 1);
 825                 if (!nl_combi)
 826                         goto nla_put_failure;
 827
 828                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 829                 if (!nl_limits)
 830                         goto nla_put_failure;
 831
 832                 for (j = 0; j < c->n_limits; j++) {
 833                         struct nlattr *nl_limit;
 834
 835                         nl_limit = nla_nest_start(msg, j + 1);
 836                         if (!nl_limit)
 837                                 goto nla_put_failure;
 838                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 839                                         c->limits[j].max))
 840                                 goto nla_put_failure;
 841                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 842                                                 c->limits[j].types))
 843                                 goto nla_put_failure;
 844                         nla_nest_end(msg, nl_limit);
 845                 }
 846
 847                 nla_nest_end(msg, nl_limits);
 848
 849                 if (c->beacon_int_infra_match &&
 850                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 851                         goto nla_put_failure;
 852                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 853                                 c->num_different_channels) ||
 854                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 855                                 c->max_interfaces))
 856                         goto nla_put_failure;
 857
 858                 nla_nest_end(msg, nl_combi);
 859         }
 860
 861         nla_nest_end(msg, nl_combis);
 862
 863         return 0;
 864 nla_put_failure:
 865         return -ENOBUFS;
 866 }
 867
 868 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 869                               struct cfg80211_registered_device *dev)
 870 {
 871         void *hdr;
 872         struct nlattr *nl_bands, *nl_band;
 873         struct nlattr *nl_freqs, *nl_freq;
 874         struct nlattr *nl_rates, *nl_rate;
 875         struct nlattr *nl_cmds;
 876         enum ieee80211_band band;
 877         struct ieee80211_channel *chan;
 878         struct ieee80211_rate *rate;
 879         int i;
 880         const struct ieee80211_txrx_stypes *mgmt_stypes =
 881                                 dev->wiphy.mgmt_stypes;
 882
 883         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 884         if (!hdr)
 885                 return -1;
 886
 887         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 888             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 889             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 890                         cfg80211_rdev_list_generation) ||
 891             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 892                        dev->wiphy.retry_short) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 894                        dev->wiphy.retry_long) ||
 895             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 896                         dev->wiphy.frag_threshold) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 898                         dev->wiphy.rts_threshold) ||
 899             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 900                        dev->wiphy.coverage_class) ||
 901             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 902                        dev->wiphy.max_scan_ssids) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 904                        dev->wiphy.max_sched_scan_ssids) ||
 905             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 906                         dev->wiphy.max_scan_ie_len) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 908                         dev->wiphy.max_sched_scan_ie_len) ||
 909             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 910                        dev->wiphy.max_match_sets))
 911                 goto nla_put_failure;
 912
 913         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 914             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 915                 goto nla_put_failure;
 916         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 917             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 918                 goto nla_put_failure;
 919         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 920             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 921                 goto nla_put_failure;
 922         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 923             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 924                 goto nla_put_failure;
 925         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 926             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 927                 goto nla_put_failure;
 928         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 929             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 930                 goto nla_put_failure;
 931
 932         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 933                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 934                     dev->wiphy.cipher_suites))
 935                 goto nla_put_failure;
 936
 937         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 938                        dev->wiphy.max_num_pmkids))
 939                 goto nla_put_failure;
 940
 941         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 942             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 943                 goto nla_put_failure;
 944
 945         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 946                         dev->wiphy.available_antennas_tx) ||
 947             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 948                         dev->wiphy.available_antennas_rx))
 949                 goto nla_put_failure;
 950
 951         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 952             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 953                         dev->wiphy.probe_resp_offload))
 954                 goto nla_put_failure;
 955
 956         if ((dev->wiphy.available_antennas_tx ||
 957              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 958                 u32 tx_ant = 0, rx_ant = 0;
 959                 int res;
 960                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 961                 if (!res) {
 962                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 963                                         tx_ant) ||
 964                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 965                                         rx_ant))
 966                                 goto nla_put_failure;
 967                 }
 968         }
 969
 970         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 971                                 dev->wiphy.interface_modes))
 972                 goto nla_put_failure;
 973
 974         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 975         if (!nl_bands)
 976                 goto nla_put_failure;
 977
 978         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 979                 if (!dev->wiphy.bands[band])
 980                         continue;
 981
 982                 nl_band = nla_nest_start(msg, band);
 983                 if (!nl_band)
 984                         goto nla_put_failure;
 985
 986                 /* add HT info */
 987                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 988                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 989                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 990                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 991                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 992                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 993                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 994                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 997                         goto nla_put_failure;
 998
 999                 /* add VHT info */
1000                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1001                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1002                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1003                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1004                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1005                                  dev->wiphy.bands[band]->vht_cap.cap)))
1006                         goto nla_put_failure;
1007
1008                 /* add frequencies */
1009                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1010                 if (!nl_freqs)
1011                         goto nla_put_failure;
1012
1013                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1014                         nl_freq = nla_nest_start(msg, i);
1015                         if (!nl_freq)
1016                                 goto nla_put_failure;
1017
1018                         chan = &dev->wiphy.bands[band]->channels[i];
1019
1020                         if (nl80211_msg_put_channel(msg, chan))
1021                                 goto nla_put_failure;
1022
1023                         nla_nest_end(msg, nl_freq);
1024                 }
1025
1026                 nla_nest_end(msg, nl_freqs);
1027
1028                 /* add bitrates */
1029                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1030                 if (!nl_rates)
1031                         goto nla_put_failure;
1032
1033                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1034                         nl_rate = nla_nest_start(msg, i);
1035                         if (!nl_rate)
1036                                 goto nla_put_failure;
1037
1038                         rate = &dev->wiphy.bands[band]->bitrates[i];
1039                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1040                                         rate->bitrate))
1041                                 goto nla_put_failure;
1042                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1043                             nla_put_flag(msg,
1044                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1045                                 goto nla_put_failure;
1046
1047                         nla_nest_end(msg, nl_rate);
1048                 }
1049
1050                 nla_nest_end(msg, nl_rates);
1051
1052                 nla_nest_end(msg, nl_band);
1053         }
1054         nla_nest_end(msg, nl_bands);
1055
1056         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1057         if (!nl_cmds)
1058                 goto nla_put_failure;
1059
1060         i = 0;
1061 #define CMD(op, n)                                              \
1062          do {                                                   \
1063                 if (dev->ops->op) {                             \
1064                         i++;                                    \
1065                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1066                                 goto nla_put_failure;           \
1067                 }                                               \
1068         } while (0)
1069
1070         CMD(add_virtual_intf, NEW_INTERFACE);
1071         CMD(change_virtual_intf, SET_INTERFACE);
1072         CMD(add_key, NEW_KEY);
1073         CMD(start_ap, START_AP);
1074         CMD(add_station, NEW_STATION);
1075         CMD(add_mpath, NEW_MPATH);
1076         CMD(update_mesh_config, SET_MESH_CONFIG);
1077         CMD(change_bss, SET_BSS);
1078         CMD(auth, AUTHENTICATE);
1079         CMD(assoc, ASSOCIATE);
1080         CMD(deauth, DEAUTHENTICATE);
1081         CMD(disassoc, DISASSOCIATE);
1082         CMD(join_ibss, JOIN_IBSS);
1083         CMD(join_mesh, JOIN_MESH);
1084         CMD(set_pmksa, SET_PMKSA);
1085         CMD(del_pmksa, DEL_PMKSA);
1086         CMD(flush_pmksa, FLUSH_PMKSA);
1087         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1088                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1089         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1090         CMD(mgmt_tx, FRAME);
1091         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1092         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1093                 i++;
1094                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1095                         goto nla_put_failure;
1096         }
1097         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1098             dev->ops->join_mesh) {
1099                 i++;
1100                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1101                         goto nla_put_failure;
1102         }
1103         CMD(set_wds_peer, SET_WDS_PEER);
1104         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1105                 CMD(tdls_mgmt, TDLS_MGMT);
1106                 CMD(tdls_oper, TDLS_OPER);
1107         }
1108         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1109                 CMD(sched_scan_start, START_SCHED_SCAN);
1110         CMD(probe_client, PROBE_CLIENT);
1111         CMD(set_noack_map, SET_NOACK_MAP);
1112         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1113                 i++;
1114                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1115                         goto nla_put_failure;
1116         }
1117         CMD(start_p2p_device, START_P2P_DEVICE);
1118         CMD(set_mcast_rate, SET_MCAST_RATE);
1119
1120 #ifdef CONFIG_NL80211_TESTMODE
1121         CMD(testmode_cmd, TESTMODE);
1122 #endif
1123
1124 #undef CMD
1125
1126         if (dev->ops->connect || dev->ops->auth) {
1127                 i++;
1128                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1129                         goto nla_put_failure;
1130         }
1131
1132         if (dev->ops->disconnect || dev->ops->deauth) {
1133                 i++;
1134                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1135                         goto nla_put_failure;
1136         }
1137
1138         nla_nest_end(msg, nl_cmds);
1139
1140         if (dev->ops->remain_on_channel &&
1141             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1142             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1143                         dev->wiphy.max_remain_on_channel_duration))
1144                 goto nla_put_failure;
1145
1146         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1147             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1148                 goto nla_put_failure;
1149
1150         if (mgmt_stypes) {
1151                 u16 stypes;
1152                 struct nlattr *nl_ftypes, *nl_ifs;
1153                 enum nl80211_iftype ift;
1154
1155                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1156                 if (!nl_ifs)
1157                         goto nla_put_failure;
1158
1159                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1160                         nl_ftypes = nla_nest_start(msg, ift);
1161                         if (!nl_ftypes)
1162                                 goto nla_put_failure;
1163                         i = 0;
1164                         stypes = mgmt_stypes[ift].tx;
1165                         while (stypes) {
1166                                 if ((stypes & 1) &&
1167                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1168                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1169                                         goto nla_put_failure;
1170                                 stypes >>= 1;
1171                                 i++;
1172                         }
1173                         nla_nest_end(msg, nl_ftypes);
1174                 }
1175
1176                 nla_nest_end(msg, nl_ifs);
1177
1178                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1179                 if (!nl_ifs)
1180                         goto nla_put_failure;
1181
1182                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1183                         nl_ftypes = nla_nest_start(msg, ift);
1184                         if (!nl_ftypes)
1185                                 goto nla_put_failure;
1186                         i = 0;
1187                         stypes = mgmt_stypes[ift].rx;
1188                         while (stypes) {
1189                                 if ((stypes & 1) &&
1190                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1191                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1192                                         goto nla_put_failure;
1193                                 stypes >>= 1;
1194                                 i++;
1195                         }
1196                         nla_nest_end(msg, nl_ftypes);
1197                 }
1198                 nla_nest_end(msg, nl_ifs);
1199         }
1200
1201 #ifdef CONFIG_PM
1202         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1203                 struct nlattr *nl_wowlan;
1204
1205                 nl_wowlan = nla_nest_start(msg,
1206                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1207                 if (!nl_wowlan)
1208                         goto nla_put_failure;
1209
1210                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1211                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1212                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1226                     goto nla_put_failure;
1227                 if (dev->wiphy.wowlan.n_patterns) {
1228                         struct nl80211_wowlan_pattern_support pat = {
1229                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1230                                 .min_pattern_len =
1231                                         dev->wiphy.wowlan.pattern_min_len,
1232                                 .max_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_max_len,
1234                         };
1235                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1236                                     sizeof(pat), &pat))
1237                                 goto nla_put_failure;
1238                 }
1239
1240                 nla_nest_end(msg, nl_wowlan);
1241         }
1242 #endif
1243
1244         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1245                                 dev->wiphy.software_iftypes))
1246                 goto nla_put_failure;
1247
1248         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1249                 goto nla_put_failure;
1250
1251         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1252             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1253                         dev->wiphy.ap_sme_capa))
1254                 goto nla_put_failure;
1255
1256         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1257                         dev->wiphy.features))
1258                 goto nla_put_failure;
1259
1260         if (dev->wiphy.ht_capa_mod_mask &&
1261             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1262                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1263                     dev->wiphy.ht_capa_mod_mask))
1264                 goto nla_put_failure;
1265
1266         return genlmsg_end(msg, hdr);
1267
1268  nla_put_failure:
1269         genlmsg_cancel(msg, hdr);
1270         return -EMSGSIZE;
1271 }
1272
1273 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1274 {
1275         int idx = 0;
1276         int start = cb->args[0];
1277         struct cfg80211_registered_device *dev;
1278
1279         mutex_lock(&cfg80211_mutex);
1280         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1281                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1282                         continue;
1283                 if (++idx <= start)
1284                         continue;
1285                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1286                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1287                                        dev) < 0) {
1288                         idx--;
1289                         break;
1290                 }
1291         }
1292         mutex_unlock(&cfg80211_mutex);
1293
1294         cb->args[0] = idx;
1295
1296         return skb->len;
1297 }
1298
1299 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1300 {
1301         struct sk_buff *msg;
1302         struct cfg80211_registered_device *dev = info->user_ptr[0];
1303
1304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1305         if (!msg)
1306                 return -ENOMEM;
1307
1308         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1309                 nlmsg_free(msg);
1310                 return -ENOBUFS;
1311         }
1312
1313         return genlmsg_reply(msg, info);
1314 }
1315
1316 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1317         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1318         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1319         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1320         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1322 };
1323
1324 static int parse_txq_params(struct nlattr *tb[],
1325                             struct ieee80211_txq_params *txq_params)
1326 {
1327         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1328             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1329             !tb[NL80211_TXQ_ATTR_AIFS])
1330                 return -EINVAL;
1331
1332         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1333         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1334         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1335         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1336         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1337
1338         if (txq_params->ac >= NL80211_NUM_ACS)
1339                 return -EINVAL;
1340
1341         return 0;
1342 }
1343
1344 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1345 {
1346         /*
1347          * You can only set the channel explicitly for WDS interfaces,
1348          * all others have their channel managed via their respective
1349          * "establish a connection" command (connect, join, ...)
1350          *
1351          * For AP/GO and mesh mode, the channel can be set with the
1352          * channel userspace API, but is only stored and passed to the
1353          * low-level driver when the AP starts or the mesh is joined.
1354          * This is for backward compatibility, userspace can also give
1355          * the channel in the start-ap or join-mesh commands instead.
1356          *
1357          * Monitors are special as they are normally slaved to
1358          * whatever else is going on, so they have their own special
1359          * operation to set the monitor channel if possible.
1360          */
1361         return !wdev ||
1362                 wdev->iftype == NL80211_IFTYPE_AP ||
1363                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1364                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1365                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1366 }
1367
1368 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1369                                  struct genl_info *info,
1370                                  struct cfg80211_chan_def *chandef)
1371 {
1372         struct ieee80211_sta_ht_cap *ht_cap;
1373         struct ieee80211_sta_vht_cap *vht_cap;
1374         u32 control_freq, width;
1375
1376         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1377                 return -EINVAL;
1378
1379         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1380
1381         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1382         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1383         chandef->center_freq1 = control_freq;
1384         chandef->center_freq2 = 0;
1385
1386         /* Primary channel not allowed */
1387         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1388                 return -EINVAL;
1389
1390         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1391                 enum nl80211_channel_type chantype;
1392
1393                 chantype = nla_get_u32(
1394                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1395
1396                 switch (chantype) {
1397                 case NL80211_CHAN_NO_HT:
1398                 case NL80211_CHAN_HT20:
1399                 case NL80211_CHAN_HT40PLUS:
1400                 case NL80211_CHAN_HT40MINUS:
1401                         cfg80211_chandef_create(chandef, chandef->chan,
1402                                                 chantype);
1403                         break;
1404                 default:
1405                         return -EINVAL;
1406                 }
1407         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1408                 chandef->width =
1409                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1410                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1411                         chandef->center_freq1 =
1412                                 nla_get_u32(
1413                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1414                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1415                         chandef->center_freq2 =
1416                                 nla_get_u32(
1417                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1418         }
1419
1420         ht_cap = &rdev->wiphy.bands[chandef->chan->band]->ht_cap;
1421         vht_cap = &rdev->wiphy.bands[chandef->chan->band]->vht_cap;
1422
1423         if (!cfg80211_chandef_valid(chandef))
1424                 return -EINVAL;
1425
1426         switch (chandef->width) {
1427         case NL80211_CHAN_WIDTH_20:
1428         case NL80211_CHAN_WIDTH_20_NOHT:
1429                 width = 20;
1430                 break;
1431         case NL80211_CHAN_WIDTH_40:
1432                 width = 40;
1433                 break;
1434         case NL80211_CHAN_WIDTH_80:
1435                 width = 80;
1436                 break;
1437         case NL80211_CHAN_WIDTH_80P80:
1438                 width = 80;
1439                 break;
1440         case NL80211_CHAN_WIDTH_160:
1441                 width = 160;
1442                 break;
1443         default:
1444                 return -EINVAL;
1445         }
1446
1447         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1448                                      IEEE80211_CHAN_DISABLED))
1449                 return -EINVAL;
1450
1451         return 0;
1452 }
1453
1454 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1455                                  struct wireless_dev *wdev,
1456                                  struct genl_info *info)
1457 {
1458         struct cfg80211_chan_def chandef;
1459         int result;
1460         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1461
1462         if (wdev)
1463                 iftype = wdev->iftype;
1464
1465         if (!nl80211_can_set_dev_channel(wdev))
1466                 return -EOPNOTSUPP;
1467
1468         result = nl80211_parse_chandef(rdev, info, &chandef);
1469         if (result)
1470                 return result;
1471
1472         mutex_lock(&rdev->devlist_mtx);
1473         switch (iftype) {
1474         case NL80211_IFTYPE_AP:
1475         case NL80211_IFTYPE_P2P_GO:
1476                 if (wdev->beacon_interval) {
1477                         result = -EBUSY;
1478                         break;
1479                 }
1480                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1481                         result = -EINVAL;
1482                         break;
1483                 }
1484                 wdev->preset_chandef = chandef;
1485                 result = 0;
1486                 break;
1487         case NL80211_IFTYPE_MESH_POINT:
1488                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1489                 break;
1490         case NL80211_IFTYPE_MONITOR:
1491                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1492                 break;
1493         default:
1494                 result = -EINVAL;
1495         }
1496         mutex_unlock(&rdev->devlist_mtx);
1497
1498         return result;
1499 }
1500
1501 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1502 {
1503         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1504         struct net_device *netdev = info->user_ptr[1];
1505
1506         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1507 }
1508
1509 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1510 {
1511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1512         struct net_device *dev = info->user_ptr[1];
1513         struct wireless_dev *wdev = dev->ieee80211_ptr;
1514         const u8 *bssid;
1515
1516         if (!info->attrs[NL80211_ATTR_MAC])
1517                 return -EINVAL;
1518
1519         if (netif_running(dev))
1520                 return -EBUSY;
1521
1522         if (!rdev->ops->set_wds_peer)
1523                 return -EOPNOTSUPP;
1524
1525         if (wdev->iftype != NL80211_IFTYPE_WDS)
1526                 return -EOPNOTSUPP;
1527
1528         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1529         return rdev_set_wds_peer(rdev, dev, bssid);
1530 }
1531
1532
1533 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1534 {
1535         struct cfg80211_registered_device *rdev;
1536         struct net_device *netdev = NULL;
1537         struct wireless_dev *wdev;
1538         int result = 0, rem_txq_params = 0;
1539         struct nlattr *nl_txq_params;
1540         u32 changed;
1541         u8 retry_short = 0, retry_long = 0;
1542         u32 frag_threshold = 0, rts_threshold = 0;
1543         u8 coverage_class = 0;
1544
1545         /*
1546          * Try to find the wiphy and netdev. Normally this
1547          * function shouldn't need the netdev, but this is
1548          * done for backward compatibility -- previously
1549          * setting the channel was done per wiphy, but now
1550          * it is per netdev. Previous userland like hostapd
1551          * also passed a netdev to set_wiphy, so that it is
1552          * possible to let that go to the right netdev!
1553          */
1554         mutex_lock(&cfg80211_mutex);
1555
1556         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1557                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1558
1559                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1560                 if (netdev && netdev->ieee80211_ptr) {
1561                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1562                         mutex_lock(&rdev->mtx);
1563                 } else
1564                         netdev = NULL;
1565         }
1566
1567         if (!netdev) {
1568                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1569                                                   info->attrs);
1570                 if (IS_ERR(rdev)) {
1571                         mutex_unlock(&cfg80211_mutex);
1572                         return PTR_ERR(rdev);
1573                 }
1574                 wdev = NULL;
1575                 netdev = NULL;
1576                 result = 0;
1577
1578                 mutex_lock(&rdev->mtx);
1579         } else
1580                 wdev = netdev->ieee80211_ptr;
1581
1582         /*
1583          * end workaround code, by now the rdev is available
1584          * and locked, and wdev may or may not be NULL.
1585          */
1586
1587         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1588                 result = cfg80211_dev_rename(
1589                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1590
1591         mutex_unlock(&cfg80211_mutex);
1592
1593         if (result)
1594                 goto bad_res;
1595
1596         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1597                 struct ieee80211_txq_params txq_params;
1598                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1599
1600                 if (!rdev->ops->set_txq_params) {
1601                         result = -EOPNOTSUPP;
1602                         goto bad_res;
1603                 }
1604
1605                 if (!netdev) {
1606                         result = -EINVAL;
1607                         goto bad_res;
1608                 }
1609
1610                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1611                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1612                         result = -EINVAL;
1613                         goto bad_res;
1614                 }
1615
1616                 if (!netif_running(netdev)) {
1617                         result = -ENETDOWN;
1618                         goto bad_res;
1619                 }
1620
1621                 nla_for_each_nested(nl_txq_params,
1622                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1623                                     rem_txq_params) {
1624                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1625                                   nla_data(nl_txq_params),
1626                                   nla_len(nl_txq_params),
1627                                   txq_params_policy);
1628                         result = parse_txq_params(tb, &txq_params);
1629                         if (result)
1630                                 goto bad_res;
1631
1632                         result = rdev_set_txq_params(rdev, netdev,
1633                                                      &txq_params);
1634                         if (result)
1635                                 goto bad_res;
1636                 }
1637         }
1638
1639         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1640                 result = __nl80211_set_channel(rdev,
1641                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1642                                 info);
1643                 if (result)
1644                         goto bad_res;
1645         }
1646
1647         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1648                 struct wireless_dev *txp_wdev = wdev;
1649                 enum nl80211_tx_power_setting type;
1650                 int idx, mbm = 0;
1651
1652                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1653                         txp_wdev = NULL;
1654
1655                 if (!rdev->ops->set_tx_power) {
1656                         result = -EOPNOTSUPP;
1657                         goto bad_res;
1658                 }
1659
1660                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1661                 type = nla_get_u32(info->attrs[idx]);
1662
1663                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1664                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1665                         result = -EINVAL;
1666                         goto bad_res;
1667                 }
1668
1669                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1670                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1671                         mbm = nla_get_u32(info->attrs[idx]);
1672                 }
1673
1674                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1675                 if (result)
1676                         goto bad_res;
1677         }
1678
1679         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1680             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1681                 u32 tx_ant, rx_ant;
1682                 if ((!rdev->wiphy.available_antennas_tx &&
1683                      !rdev->wiphy.available_antennas_rx) ||
1684                     !rdev->ops->set_antenna) {
1685                         result = -EOPNOTSUPP;
1686                         goto bad_res;
1687                 }
1688
1689                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1690                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1691
1692                 /* reject antenna configurations which don't match the
1693                  * available antenna masks, except for the "all" mask */
1694                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1695                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1696                         result = -EINVAL;
1697                         goto bad_res;
1698                 }
1699
1700                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1701                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1702
1703                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1704                 if (result)
1705                         goto bad_res;
1706         }
1707
1708         changed = 0;
1709
1710         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1711                 retry_short = nla_get_u8(
1712                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1713                 if (retry_short == 0) {
1714                         result = -EINVAL;
1715                         goto bad_res;
1716                 }
1717                 changed |= WIPHY_PARAM_RETRY_SHORT;
1718         }
1719
1720         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1721                 retry_long = nla_get_u8(
1722                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1723                 if (retry_long == 0) {
1724                         result = -EINVAL;
1725                         goto bad_res;
1726                 }
1727                 changed |= WIPHY_PARAM_RETRY_LONG;
1728         }
1729
1730         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1731                 frag_threshold = nla_get_u32(
1732                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1733                 if (frag_threshold < 256) {
1734                         result = -EINVAL;
1735                         goto bad_res;
1736                 }
1737                 if (frag_threshold != (u32) -1) {
1738                         /*
1739                          * Fragments (apart from the last one) are required to
1740                          * have even length. Make the fragmentation code
1741                          * simpler by stripping LSB should someone try to use
1742                          * odd threshold value.
1743                          */
1744                         frag_threshold &= ~0x1;
1745                 }
1746                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1747         }
1748
1749         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1750                 rts_threshold = nla_get_u32(
1751                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1752                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1753         }
1754
1755         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1756                 coverage_class = nla_get_u8(
1757                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1758                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1759         }
1760
1761         if (changed) {
1762                 u8 old_retry_short, old_retry_long;
1763                 u32 old_frag_threshold, old_rts_threshold;
1764                 u8 old_coverage_class;
1765
1766                 if (!rdev->ops->set_wiphy_params) {
1767                         result = -EOPNOTSUPP;
1768                         goto bad_res;
1769                 }
1770
1771                 old_retry_short = rdev->wiphy.retry_short;
1772                 old_retry_long = rdev->wiphy.retry_long;
1773                 old_frag_threshold = rdev->wiphy.frag_threshold;
1774                 old_rts_threshold = rdev->wiphy.rts_threshold;
1775                 old_coverage_class = rdev->wiphy.coverage_class;
1776
1777                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1778                         rdev->wiphy.retry_short = retry_short;
1779                 if (changed & WIPHY_PARAM_RETRY_LONG)
1780                         rdev->wiphy.retry_long = retry_long;
1781                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1782                         rdev->wiphy.frag_threshold = frag_threshold;
1783                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1784                         rdev->wiphy.rts_threshold = rts_threshold;
1785                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1786                         rdev->wiphy.coverage_class = coverage_class;
1787
1788                 result = rdev_set_wiphy_params(rdev, changed);
1789                 if (result) {
1790                         rdev->wiphy.retry_short = old_retry_short;
1791                         rdev->wiphy.retry_long = old_retry_long;
1792                         rdev->wiphy.frag_threshold = old_frag_threshold;
1793                         rdev->wiphy.rts_threshold = old_rts_threshold;
1794                         rdev->wiphy.coverage_class = old_coverage_class;
1795                 }
1796         }
1797
1798  bad_res:
1799         mutex_unlock(&rdev->mtx);
1800         if (netdev)
1801                 dev_put(netdev);
1802         return result;
1803 }
1804
1805 static inline u64 wdev_id(struct wireless_dev *wdev)
1806 {
1807         return (u64)wdev->identifier |
1808                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1809 }
1810
1811 static int nl80211_send_chandef(struct sk_buff *msg,
1812                                  struct cfg80211_chan_def *chandef)
1813 {
1814         WARN_ON(!cfg80211_chandef_valid(chandef));
1815
1816         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1817                         chandef->chan->center_freq))
1818                 return -ENOBUFS;
1819         switch (chandef->width) {
1820         case NL80211_CHAN_WIDTH_20_NOHT:
1821         case NL80211_CHAN_WIDTH_20:
1822         case NL80211_CHAN_WIDTH_40:
1823                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1824                                 cfg80211_get_chandef_type(chandef)))
1825                         return -ENOBUFS;
1826                 break;
1827         default:
1828                 break;
1829         }
1830         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1831                 return -ENOBUFS;
1832         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1833                 return -ENOBUFS;
1834         if (chandef->center_freq2 &&
1835             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1836                 return -ENOBUFS;
1837         return 0;
1838 }
1839
1840 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1841                               struct cfg80211_registered_device *rdev,
1842                               struct wireless_dev *wdev)
1843 {
1844         struct net_device *dev = wdev->netdev;
1845         void *hdr;
1846
1847         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1848         if (!hdr)
1849                 return -1;
1850
1851         if (dev &&
1852             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1853              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1854                 goto nla_put_failure;
1855
1856         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1857             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1858             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1859             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1860             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1861                         rdev->devlist_generation ^
1862                         (cfg80211_rdev_list_generation << 2)))
1863                 goto nla_put_failure;
1864
1865         if (rdev->ops->get_channel) {
1866                 int ret;
1867                 struct cfg80211_chan_def chandef;
1868
1869                 ret = rdev_get_channel(rdev, wdev, &chandef);
1870                 if (ret == 0) {
1871                         if (nl80211_send_chandef(msg, &chandef))
1872                                 goto nla_put_failure;
1873                 }
1874         }
1875
1876         if (wdev->ssid_len) {
1877                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1878                         goto nla_put_failure;
1879         }
1880
1881         return genlmsg_end(msg, hdr);
1882
1883  nla_put_failure:
1884         genlmsg_cancel(msg, hdr);
1885         return -EMSGSIZE;
1886 }
1887
1888 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1889 {
1890         int wp_idx = 0;
1891         int if_idx = 0;
1892         int wp_start = cb->args[0];
1893         int if_start = cb->args[1];
1894         struct cfg80211_registered_device *rdev;
1895         struct wireless_dev *wdev;
1896
1897         mutex_lock(&cfg80211_mutex);
1898         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1899                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1900                         continue;
1901                 if (wp_idx < wp_start) {
1902                         wp_idx++;
1903                         continue;
1904                 }
1905                 if_idx = 0;
1906
1907                 mutex_lock(&rdev->devlist_mtx);
1908                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1909                         if (if_idx < if_start) {
1910                                 if_idx++;
1911                                 continue;
1912                         }
1913                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1914                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1915                                                rdev, wdev) < 0) {
1916                                 mutex_unlock(&rdev->devlist_mtx);
1917                                 goto out;
1918                         }
1919                         if_idx++;
1920                 }
1921                 mutex_unlock(&rdev->devlist_mtx);
1922
1923                 wp_idx++;
1924         }
1925  out:
1926         mutex_unlock(&cfg80211_mutex);
1927
1928         cb->args[0] = wp_idx;
1929         cb->args[1] = if_idx;
1930
1931         return skb->len;
1932 }
1933
1934 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1935 {
1936         struct sk_buff *msg;
1937         struct cfg80211_registered_device *dev = info->user_ptr[0];
1938         struct wireless_dev *wdev = info->user_ptr[1];
1939
1940         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1941         if (!msg)
1942                 return -ENOMEM;
1943
1944         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1945                                dev, wdev) < 0) {
1946                 nlmsg_free(msg);
1947                 return -ENOBUFS;
1948         }
1949
1950         return genlmsg_reply(msg, info);
1951 }
1952
1953 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1954         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1955         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1956         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1957         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1958         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1959 };
1960
1961 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1962 {
1963         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1964         int flag;
1965
1966         *mntrflags = 0;
1967
1968         if (!nla)
1969                 return -EINVAL;
1970
1971         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1972                              nla, mntr_flags_policy))
1973                 return -EINVAL;
1974
1975         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1976                 if (flags[flag])
1977                         *mntrflags |= (1<<flag);
1978
1979         return 0;
1980 }
1981
1982 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1983                                struct net_device *netdev, u8 use_4addr,
1984                                enum nl80211_iftype iftype)
1985 {
1986         if (!use_4addr) {
1987                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1988                         return -EBUSY;
1989                 return 0;
1990         }
1991
1992         switch (iftype) {
1993         case NL80211_IFTYPE_AP_VLAN:
1994                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1995                         return 0;
1996                 break;
1997         case NL80211_IFTYPE_STATION:
1998                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1999                         return 0;
2000                 break;
2001         default:
2002                 break;
2003         }
2004
2005         return -EOPNOTSUPP;
2006 }
2007
2008 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2009 {
2010         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2011         struct vif_params params;
2012         int err;
2013         enum nl80211_iftype otype, ntype;
2014         struct net_device *dev = info->user_ptr[1];
2015         u32 _flags, *flags = NULL;
2016         bool change = false;
2017
2018         memset(&params, 0, sizeof(params));
2019
2020         otype = ntype = dev->ieee80211_ptr->iftype;
2021
2022         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2023                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2024                 if (otype != ntype)
2025                         change = true;
2026                 if (ntype > NL80211_IFTYPE_MAX)
2027                         return -EINVAL;
2028         }
2029
2030         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2031                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2032
2033                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2034                         return -EINVAL;
2035                 if (netif_running(dev))
2036                         return -EBUSY;
2037
2038                 wdev_lock(wdev);
2039                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2040                              IEEE80211_MAX_MESH_ID_LEN);
2041                 wdev->mesh_id_up_len =
2042                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2043                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2044                        wdev->mesh_id_up_len);
2045                 wdev_unlock(wdev);
2046         }
2047
2048         if (info->attrs[NL80211_ATTR_4ADDR]) {
2049                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2050                 change = true;
2051                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2052                 if (err)
2053                         return err;
2054         } else {
2055                 params.use_4addr = -1;
2056         }
2057
2058         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2059                 if (ntype != NL80211_IFTYPE_MONITOR)
2060                         return -EINVAL;
2061                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2062                                           &_flags);
2063                 if (err)
2064                         return err;
2065
2066                 flags = &_flags;
2067                 change = true;
2068         }
2069
2070         if (change)
2071                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2072         else
2073                 err = 0;
2074
2075         if (!err && params.use_4addr != -1)
2076                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2077
2078         return err;
2079 }
2080
2081 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2082 {
2083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2084         struct vif_params params;
2085         struct wireless_dev *wdev;
2086         struct sk_buff *msg;
2087         int err;
2088         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2089         u32 flags;
2090
2091         memset(&params, 0, sizeof(params));
2092
2093         if (!info->attrs[NL80211_ATTR_IFNAME])
2094                 return -EINVAL;
2095
2096         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2097                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2098                 if (type > NL80211_IFTYPE_MAX)
2099                         return -EINVAL;
2100         }
2101
2102         if (!rdev->ops->add_virtual_intf ||
2103             !(rdev->wiphy.interface_modes & (1 << type)))
2104                 return -EOPNOTSUPP;
2105
2106         if (info->attrs[NL80211_ATTR_4ADDR]) {
2107                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2108                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2109                 if (err)
2110                         return err;
2111         }
2112
2113         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2114         if (!msg)
2115                 return -ENOMEM;
2116
2117         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2118                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2119                                   &flags);
2120         wdev = rdev_add_virtual_intf(rdev,
2121                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2122                                 type, err ? NULL : &flags, &params);
2123         if (IS_ERR(wdev)) {
2124                 nlmsg_free(msg);
2125                 return PTR_ERR(wdev);
2126         }
2127
2128         switch (type) {
2129         case NL80211_IFTYPE_MESH_POINT:
2130                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2131                         break;
2132                 wdev_lock(wdev);
2133                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2134                              IEEE80211_MAX_MESH_ID_LEN);
2135                 wdev->mesh_id_up_len =
2136                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2137                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2138                        wdev->mesh_id_up_len);
2139                 wdev_unlock(wdev);
2140                 break;
2141         case NL80211_IFTYPE_P2P_DEVICE:
2142                 /*
2143                  * P2P Device doesn't have a netdev, so doesn't go
2144                  * through the netdev notifier and must be added here
2145                  */
2146                 mutex_init(&wdev->mtx);
2147                 INIT_LIST_HEAD(&wdev->event_list);
2148                 spin_lock_init(&wdev->event_lock);
2149                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2150                 spin_lock_init(&wdev->mgmt_registrations_lock);
2151
2152                 mutex_lock(&rdev->devlist_mtx);
2153                 wdev->identifier = ++rdev->wdev_id;
2154                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2155                 rdev->devlist_generation++;
2156                 mutex_unlock(&rdev->devlist_mtx);
2157                 break;
2158         default:
2159                 break;
2160         }
2161
2162         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2163                                rdev, wdev) < 0) {
2164                 nlmsg_free(msg);
2165                 return -ENOBUFS;
2166         }
2167
2168         return genlmsg_reply(msg, info);
2169 }
2170
2171 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2172 {
2173         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2174         struct wireless_dev *wdev = info->user_ptr[1];
2175
2176         if (!rdev->ops->del_virtual_intf)
2177                 return -EOPNOTSUPP;
2178
2179         /*
2180          * If we remove a wireless device without a netdev then clear
2181          * user_ptr[1] so that nl80211_post_doit won't dereference it
2182          * to check if it needs to do dev_put(). Otherwise it crashes
2183          * since the wdev has been freed, unlike with a netdev where
2184          * we need the dev_put() for the netdev to really be freed.
2185          */
2186         if (!wdev->netdev)
2187                 info->user_ptr[1] = NULL;
2188
2189         return rdev_del_virtual_intf(rdev, wdev);
2190 }
2191
2192 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2193 {
2194         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2195         struct net_device *dev = info->user_ptr[1];
2196         u16 noack_map;
2197
2198         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2199                 return -EINVAL;
2200
2201         if (!rdev->ops->set_noack_map)
2202                 return -EOPNOTSUPP;
2203
2204         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2205
2206         return rdev_set_noack_map(rdev, dev, noack_map);
2207 }
2208
2209 struct get_key_cookie {
2210         struct sk_buff *msg;
2211         int error;
2212         int idx;
2213 };
2214
2215 static void get_key_callback(void *c, struct key_params *params)
2216 {
2217         struct nlattr *key;
2218         struct get_key_cookie *cookie = c;
2219
2220         if ((params->key &&
2221              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2222                      params->key_len, params->key)) ||
2223             (params->seq &&
2224              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2225                      params->seq_len, params->seq)) ||
2226             (params->cipher &&
2227              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2228                          params->cipher)))
2229                 goto nla_put_failure;
2230
2231         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2232         if (!key)
2233                 goto nla_put_failure;
2234
2235         if ((params->key &&
2236              nla_put(cookie->msg, NL80211_KEY_DATA,
2237                      params->key_len, params->key)) ||
2238             (params->seq &&
2239              nla_put(cookie->msg, NL80211_KEY_SEQ,
2240                      params->seq_len, params->seq)) ||
2241             (params->cipher &&
2242              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2243                          params->cipher)))
2244                 goto nla_put_failure;
2245
2246         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2247                 goto nla_put_failure;
2248
2249         nla_nest_end(cookie->msg, key);
2250
2251         return;
2252  nla_put_failure:
2253         cookie->error = 1;
2254 }
2255
2256 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2257 {
2258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2259         int err;
2260         struct net_device *dev = info->user_ptr[1];
2261         u8 key_idx = 0;
2262         const u8 *mac_addr = NULL;
2263         bool pairwise;
2264         struct get_key_cookie cookie = {
2265                 .error = 0,
2266         };
2267         void *hdr;
2268         struct sk_buff *msg;
2269
2270         if (info->attrs[NL80211_ATTR_KEY_IDX])
2271                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2272
2273         if (key_idx > 5)
2274                 return -EINVAL;
2275
2276         if (info->attrs[NL80211_ATTR_MAC])
2277                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2278
2279         pairwise = !!mac_addr;
2280         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2281                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2282                 if (kt >= NUM_NL80211_KEYTYPES)
2283                         return -EINVAL;
2284                 if (kt != NL80211_KEYTYPE_GROUP &&
2285                     kt != NL80211_KEYTYPE_PAIRWISE)
2286                         return -EINVAL;
2287                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2288         }
2289
2290         if (!rdev->ops->get_key)
2291                 return -EOPNOTSUPP;
2292
2293         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2294         if (!msg)
2295                 return -ENOMEM;
2296
2297         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2298                              NL80211_CMD_NEW_KEY);
2299         if (IS_ERR(hdr))
2300                 return PTR_ERR(hdr);
2301
2302         cookie.msg = msg;
2303         cookie.idx = key_idx;
2304
2305         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2306             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2307                 goto nla_put_failure;
2308         if (mac_addr &&
2309             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2310                 goto nla_put_failure;
2311
2312         if (pairwise && mac_addr &&
2313             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2314                 return -ENOENT;
2315
2316         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2317                            get_key_callback);
2318
2319         if (err)
2320                 goto free_msg;
2321
2322         if (cookie.error)
2323                 goto nla_put_failure;
2324
2325         genlmsg_end(msg, hdr);
2326         return genlmsg_reply(msg, info);
2327
2328  nla_put_failure:
2329         err = -ENOBUFS;
2330  free_msg:
2331         nlmsg_free(msg);
2332         return err;
2333 }
2334
2335 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2336 {
2337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2338         struct key_parse key;
2339         int err;
2340         struct net_device *dev = info->user_ptr[1];
2341
2342         err = nl80211_parse_key(info, &key);
2343         if (err)
2344                 return err;
2345
2346         if (key.idx < 0)
2347                 return -EINVAL;
2348
2349         /* only support setting default key */
2350         if (!key.def && !key.defmgmt)
2351                 return -EINVAL;
2352
2353         wdev_lock(dev->ieee80211_ptr);
2354
2355         if (key.def) {
2356                 if (!rdev->ops->set_default_key) {
2357                         err = -EOPNOTSUPP;
2358                         goto out;
2359                 }
2360
2361                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2362                 if (err)
2363                         goto out;
2364
2365                 err = rdev_set_default_key(rdev, dev, key.idx,
2366                                                  key.def_uni, key.def_multi);
2367
2368                 if (err)
2369                         goto out;
2370
2371 #ifdef CONFIG_CFG80211_WEXT
2372                 dev->ieee80211_ptr->wext.default_key = key.idx;
2373 #endif
2374         } else {
2375                 if (key.def_uni || !key.def_multi) {
2376                         err = -EINVAL;
2377                         goto out;
2378                 }
2379
2380                 if (!rdev->ops->set_default_mgmt_key) {
2381                         err = -EOPNOTSUPP;
2382                         goto out;
2383                 }
2384
2385                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2386                 if (err)
2387                         goto out;
2388
2389                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2390                 if (err)
2391                         goto out;
2392
2393 #ifdef CONFIG_CFG80211_WEXT
2394                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2395 #endif
2396         }
2397
2398  out:
2399         wdev_unlock(dev->ieee80211_ptr);
2400
2401         return err;
2402 }
2403
2404 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2405 {
2406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2407         int err;
2408         struct net_device *dev = info->user_ptr[1];
2409         struct key_parse key;
2410         const u8 *mac_addr = NULL;
2411
2412         err = nl80211_parse_key(info, &key);
2413         if (err)
2414                 return err;
2415
2416         if (!key.p.key)
2417                 return -EINVAL;
2418
2419         if (info->attrs[NL80211_ATTR_MAC])
2420                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2421
2422         if (key.type == -1) {
2423                 if (mac_addr)
2424                         key.type = NL80211_KEYTYPE_PAIRWISE;
2425                 else
2426                         key.type = NL80211_KEYTYPE_GROUP;
2427         }
2428
2429         /* for now */
2430         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2431             key.type != NL80211_KEYTYPE_GROUP)
2432                 return -EINVAL;
2433
2434         if (!rdev->ops->add_key)
2435                 return -EOPNOTSUPP;
2436
2437         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2438                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2439                                            mac_addr))
2440                 return -EINVAL;
2441
2442         wdev_lock(dev->ieee80211_ptr);
2443         err = nl80211_key_allowed(dev->ieee80211_ptr);
2444         if (!err)
2445                 err = rdev_add_key(rdev, dev, key.idx,
2446                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2447                                     mac_addr, &key.p);
2448         wdev_unlock(dev->ieee80211_ptr);
2449
2450         return err;
2451 }
2452
2453 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2454 {
2455         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2456         int err;
2457         struct net_device *dev = info->user_ptr[1];
2458         u8 *mac_addr = NULL;
2459         struct key_parse key;
2460
2461         err = nl80211_parse_key(info, &key);
2462         if (err)
2463                 return err;
2464
2465         if (info->attrs[NL80211_ATTR_MAC])
2466                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2467
2468         if (key.type == -1) {
2469                 if (mac_addr)
2470                         key.type = NL80211_KEYTYPE_PAIRWISE;
2471                 else
2472                         key.type = NL80211_KEYTYPE_GROUP;
2473         }
2474
2475         /* for now */
2476         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2477             key.type != NL80211_KEYTYPE_GROUP)
2478                 return -EINVAL;
2479
2480         if (!rdev->ops->del_key)
2481                 return -EOPNOTSUPP;
2482
2483         wdev_lock(dev->ieee80211_ptr);
2484         err = nl80211_key_allowed(dev->ieee80211_ptr);
2485
2486         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2487             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2488                 err = -ENOENT;
2489
2490         if (!err)
2491                 err = rdev_del_key(rdev, dev, key.idx,
2492                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2493                                    mac_addr);
2494
2495 #ifdef CONFIG_CFG80211_WEXT
2496         if (!err) {
2497                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2498                         dev->ieee80211_ptr->wext.default_key = -1;
2499                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2500                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2501         }
2502 #endif
2503         wdev_unlock(dev->ieee80211_ptr);
2504
2505         return err;
2506 }
2507
2508 static int nl80211_parse_beacon(struct genl_info *info,
2509                                 struct cfg80211_beacon_data *bcn)
2510 {
2511         bool haveinfo = false;
2512
2513         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2514             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2515             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2516             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2517                 return -EINVAL;
2518
2519         memset(bcn, 0, sizeof(*bcn));
2520
2521         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2522                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2523                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2524                 if (!bcn->head_len)
2525                         return -EINVAL;
2526                 haveinfo = true;
2527         }
2528
2529         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2530                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2531                 bcn->tail_len =
2532                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2533                 haveinfo = true;
2534         }
2535
2536         if (!haveinfo)
2537                 return -EINVAL;
2538
2539         if (info->attrs[NL80211_ATTR_IE]) {
2540                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2541                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2542         }
2543
2544         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2545                 bcn->proberesp_ies =
2546                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2547                 bcn->proberesp_ies_len =
2548                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2549         }
2550
2551         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2552                 bcn->assocresp_ies =
2553                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2554                 bcn->assocresp_ies_len =
2555                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2556         }
2557
2558         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2559                 bcn->probe_resp =
2560                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2561                 bcn->probe_resp_len =
2562                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2563         }
2564
2565         return 0;
2566 }
2567
2568 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2569                                    struct cfg80211_ap_settings *params)
2570 {
2571         struct wireless_dev *wdev;
2572         bool ret = false;
2573
2574         mutex_lock(&rdev->devlist_mtx);
2575
2576         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2577                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2578                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2579                         continue;
2580
2581                 if (!wdev->preset_chandef.chan)
2582                         continue;
2583
2584                 params->chandef = wdev->preset_chandef;
2585                 ret = true;
2586                 break;
2587         }
2588
2589         mutex_unlock(&rdev->devlist_mtx);
2590
2591         return ret;
2592 }
2593
2594 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2595                                     enum nl80211_auth_type auth_type,
2596                                     enum nl80211_commands cmd)
2597 {
2598         if (auth_type > NL80211_AUTHTYPE_MAX)
2599                 return false;
2600
2601         switch (cmd) {
2602         case NL80211_CMD_AUTHENTICATE:
2603                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2604                     auth_type == NL80211_AUTHTYPE_SAE)
2605                         return false;
2606                 return true;
2607         case NL80211_CMD_CONNECT:
2608         case NL80211_CMD_START_AP:
2609                 /* SAE not supported yet */
2610                 if (auth_type == NL80211_AUTHTYPE_SAE)
2611                         return false;
2612                 return true;
2613         default:
2614                 return false;
2615         }
2616 }
2617
2618 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2619 {
2620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2621         struct net_device *dev = info->user_ptr[1];
2622         struct wireless_dev *wdev = dev->ieee80211_ptr;
2623         struct cfg80211_ap_settings params;
2624         int err;
2625
2626         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2627             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2628                 return -EOPNOTSUPP;
2629
2630         if (!rdev->ops->start_ap)
2631                 return -EOPNOTSUPP;
2632
2633         if (wdev->beacon_interval)
2634                 return -EALREADY;
2635
2636         memset(&params, 0, sizeof(params));
2637
2638         /* these are required for START_AP */
2639         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2640             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2641             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2642                 return -EINVAL;
2643
2644         err = nl80211_parse_beacon(info, &params.beacon);
2645         if (err)
2646                 return err;
2647
2648         params.beacon_interval =
2649                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2650         params.dtim_period =
2651                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2652
2653         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2654         if (err)
2655                 return err;
2656
2657         /*
2658          * In theory, some of these attributes should be required here
2659          * but since they were not used when the command was originally
2660          * added, keep them optional for old user space programs to let
2661          * them continue to work with drivers that do not need the
2662          * additional information -- drivers must check!
2663          */
2664         if (info->attrs[NL80211_ATTR_SSID]) {
2665                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2666                 params.ssid_len =
2667                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2668                 if (params.ssid_len == 0 ||
2669                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2670                         return -EINVAL;
2671         }
2672
2673         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2674                 params.hidden_ssid = nla_get_u32(
2675                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2676                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2677                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2678                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2679                         return -EINVAL;
2680         }
2681
2682         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2683
2684         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2685                 params.auth_type = nla_get_u32(
2686                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2687                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2688                                              NL80211_CMD_START_AP))
2689                         return -EINVAL;
2690         } else
2691                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2692
2693         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2694                                       NL80211_MAX_NR_CIPHER_SUITES);
2695         if (err)
2696                 return err;
2697
2698         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2699                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2700                         return -EOPNOTSUPP;
2701                 params.inactivity_timeout = nla_get_u16(
2702                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2703         }
2704
2705         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2706                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2707                 if (err)
2708                         return err;
2709         } else if (wdev->preset_chandef.chan) {
2710                 params.chandef = wdev->preset_chandef;
2711         } else if (!nl80211_get_ap_channel(rdev, &params))
2712                 return -EINVAL;
2713
2714         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2715                 return -EINVAL;
2716
2717         mutex_lock(&rdev->devlist_mtx);
2718         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2719                                     CHAN_MODE_SHARED);
2720         mutex_unlock(&rdev->devlist_mtx);
2721
2722         if (err)
2723                 return err;
2724
2725         err = rdev_start_ap(rdev, dev, &params);
2726         if (!err) {
2727                 wdev->preset_chandef = params.chandef;
2728                 wdev->beacon_interval = params.beacon_interval;
2729                 wdev->channel = params.chandef.chan;
2730                 wdev->ssid_len = params.ssid_len;
2731                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2732         }
2733         return err;
2734 }
2735
2736 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2737 {
2738         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2739         struct net_device *dev = info->user_ptr[1];
2740         struct wireless_dev *wdev = dev->ieee80211_ptr;
2741         struct cfg80211_beacon_data params;
2742         int err;
2743
2744         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2745             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2746                 return -EOPNOTSUPP;
2747
2748         if (!rdev->ops->change_beacon)
2749                 return -EOPNOTSUPP;
2750
2751         if (!wdev->beacon_interval)
2752                 return -EINVAL;
2753
2754         err = nl80211_parse_beacon(info, &params);
2755         if (err)
2756                 return err;
2757
2758         return rdev_change_beacon(rdev, dev, &params);
2759 }
2760
2761 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2762 {
2763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2764         struct net_device *dev = info->user_ptr[1];
2765
2766         return cfg80211_stop_ap(rdev, dev);
2767 }
2768
2769 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2770         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2771         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2772         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2773         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2774         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2775         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2776 };
2777
2778 static int parse_station_flags(struct genl_info *info,
2779                                enum nl80211_iftype iftype,
2780                                struct station_parameters *params)
2781 {
2782         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2783         struct nlattr *nla;
2784         int flag;
2785
2786         /*
2787          * Try parsing the new attribute first so userspace
2788          * can specify both for older kernels.
2789          */
2790         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2791         if (nla) {
2792                 struct nl80211_sta_flag_update *sta_flags;
2793
2794                 sta_flags = nla_data(nla);
2795                 params->sta_flags_mask = sta_flags->mask;
2796                 params->sta_flags_set = sta_flags->set;
2797                 if ((params->sta_flags_mask |
2798                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2799                         return -EINVAL;
2800                 return 0;
2801         }
2802
2803         /* if present, parse the old attribute */
2804
2805         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2806         if (!nla)
2807                 return 0;
2808
2809         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2810                              nla, sta_flags_policy))
2811                 return -EINVAL;
2812
2813         /*
2814          * Only allow certain flags for interface types so that
2815          * other attributes are silently ignored. Remember that
2816          * this is backward compatibility code with old userspace
2817          * and shouldn't be hit in other cases anyway.
2818          */
2819         switch (iftype) {
2820         case NL80211_IFTYPE_AP:
2821         case NL80211_IFTYPE_AP_VLAN:
2822         case NL80211_IFTYPE_P2P_GO:
2823                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2824                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2825                                          BIT(NL80211_STA_FLAG_WME) |
2826                                          BIT(NL80211_STA_FLAG_MFP);
2827                 break;
2828         case NL80211_IFTYPE_P2P_CLIENT:
2829         case NL80211_IFTYPE_STATION:
2830                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2831                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2832                 break;
2833         case NL80211_IFTYPE_MESH_POINT:
2834                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2835                                          BIT(NL80211_STA_FLAG_MFP) |
2836                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2837         default:
2838                 return -EINVAL;
2839         }
2840
2841         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2842                 if (flags[flag]) {
2843                         params->sta_flags_set |= (1<<flag);
2844
2845                         /* no longer support new API additions in old API */
2846                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2847                                 return -EINVAL;
2848                 }
2849         }
2850
2851         return 0;
2852 }
2853
2854 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2855                                  int attr)
2856 {
2857         struct nlattr *rate;
2858         u32 bitrate;
2859         u16 bitrate_compat;
2860
2861         rate = nla_nest_start(msg, attr);
2862         if (!rate)
2863                 return false;
2864
2865         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2866         bitrate = cfg80211_calculate_bitrate(info);
2867         /* report 16-bit bitrate only if we can */
2868         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2869         if (bitrate > 0 &&
2870             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2871                 return false;
2872         if (bitrate_compat > 0 &&
2873             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2874                 return false;
2875
2876         if (info->flags & RATE_INFO_FLAGS_MCS) {
2877                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2878                         return false;
2879                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2880                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2881                         return false;
2882                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2883                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2884                         return false;
2885         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2886                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2887                         return false;
2888                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2889                         return false;
2890                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2891                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2892                         return false;
2893                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2894                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2895                         return false;
2896                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2897                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2898                         return false;
2899                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2900                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2901                         return false;
2902                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2903                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2904                         return false;
2905         }
2906
2907         nla_nest_end(msg, rate);
2908         return true;
2909 }
2910
2911 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2912                                 int flags,
2913                                 struct cfg80211_registered_device *rdev,
2914                                 struct net_device *dev,
2915                                 const u8 *mac_addr, struct station_info *sinfo)
2916 {
2917         void *hdr;
2918         struct nlattr *sinfoattr, *bss_param;
2919
2920         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2921         if (!hdr)
2922                 return -1;
2923
2924         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2925             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2926             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2927                 goto nla_put_failure;
2928
2929         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2930         if (!sinfoattr)
2931                 goto nla_put_failure;
2932         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2933             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2934                         sinfo->connected_time))
2935                 goto nla_put_failure;
2936         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2937             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2938                         sinfo->inactive_time))
2939                 goto nla_put_failure;
2940         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2941             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2942                         sinfo->rx_bytes))
2943                 goto nla_put_failure;
2944         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2945             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2946                         sinfo->tx_bytes))
2947                 goto nla_put_failure;
2948         if ((sinfo->filled & STATION_INFO_LLID) &&
2949             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2950                 goto nla_put_failure;
2951         if ((sinfo->filled & STATION_INFO_PLID) &&
2952             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2953                 goto nla_put_failure;
2954         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2955             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2956                        sinfo->plink_state))
2957                 goto nla_put_failure;
2958         switch (rdev->wiphy.signal_type) {
2959         case CFG80211_SIGNAL_TYPE_MBM:
2960                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2961                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2962                                sinfo->signal))
2963                         goto nla_put_failure;
2964                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2965                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2966                                sinfo->signal_avg))
2967                         goto nla_put_failure;
2968                 break;
2969         default:
2970                 break;
2971         }
2972         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2973                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2974                                           NL80211_STA_INFO_TX_BITRATE))
2975                         goto nla_put_failure;
2976         }
2977         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2978                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2979                                           NL80211_STA_INFO_RX_BITRATE))
2980                         goto nla_put_failure;
2981         }
2982         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2983             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2984                         sinfo->rx_packets))
2985                 goto nla_put_failure;
2986         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2987             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2988                         sinfo->tx_packets))
2989                 goto nla_put_failure;
2990         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2991             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2992                         sinfo->tx_retries))
2993                 goto nla_put_failure;
2994         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2995             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2996                         sinfo->tx_failed))
2997                 goto nla_put_failure;
2998         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2999             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3000                         sinfo->beacon_loss_count))
3001                 goto nla_put_failure;
3002         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3003                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3004                 if (!bss_param)
3005                         goto nla_put_failure;
3006
3007                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3008                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3009                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3010                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3011                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3012                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3013                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3014                                sinfo->bss_param.dtim_period) ||
3015                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3016                                 sinfo->bss_param.beacon_interval))
3017                         goto nla_put_failure;
3018
3019                 nla_nest_end(msg, bss_param);
3020         }
3021         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3022             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3023                     sizeof(struct nl80211_sta_flag_update),
3024                     &sinfo->sta_flags))
3025                 goto nla_put_failure;
3026         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3027                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3028                             sinfo->t_offset))
3029                 goto nla_put_failure;
3030         nla_nest_end(msg, sinfoattr);
3031
3032         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3033             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3034                     sinfo->assoc_req_ies))
3035                 goto nla_put_failure;
3036
3037         return genlmsg_end(msg, hdr);
3038
3039  nla_put_failure:
3040         genlmsg_cancel(msg, hdr);
3041         return -EMSGSIZE;
3042 }
3043
3044 static int nl80211_dump_station(struct sk_buff *skb,
3045                                 struct netlink_callback *cb)
3046 {
3047         struct station_info sinfo;
3048         struct cfg80211_registered_device *dev;
3049         struct net_device *netdev;
3050         u8 mac_addr[ETH_ALEN];
3051         int sta_idx = cb->args[1];
3052         int err;
3053
3054         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3055         if (err)
3056                 return err;
3057
3058         if (!dev->ops->dump_station) {
3059                 err = -EOPNOTSUPP;
3060                 goto out_err;
3061         }
3062
3063         while (1) {
3064                 memset(&sinfo, 0, sizeof(sinfo));
3065                 err = rdev_dump_station(dev, netdev, sta_idx,
3066                                         mac_addr, &sinfo);
3067                 if (err == -ENOENT)
3068                         break;
3069                 if (err)
3070                         goto out_err;
3071
3072                 if (nl80211_send_station(skb,
3073                                 NETLINK_CB(cb->skb).portid,
3074                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3075                                 dev, netdev, mac_addr,
3076                                 &sinfo) < 0)
3077                         goto out;
3078
3079                 sta_idx++;
3080         }
3081
3082
3083  out:
3084         cb->args[1] = sta_idx;
3085         err = skb->len;
3086  out_err:
3087         nl80211_finish_netdev_dump(dev);
3088
3089         return err;
3090 }
3091
3092 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3093 {
3094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3095         struct net_device *dev = info->user_ptr[1];
3096         struct station_info sinfo;
3097         struct sk_buff *msg;
3098         u8 *mac_addr = NULL;
3099         int err;
3100
3101         memset(&sinfo, 0, sizeof(sinfo));
3102
3103         if (!info->attrs[NL80211_ATTR_MAC])
3104                 return -EINVAL;
3105
3106         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3107
3108         if (!rdev->ops->get_station)
3109                 return -EOPNOTSUPP;
3110
3111         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3112         if (err)
3113                 return err;
3114
3115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3116         if (!msg)
3117                 return -ENOMEM;
3118
3119         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3120                                  rdev, dev, mac_addr, &sinfo) < 0) {
3121                 nlmsg_free(msg);
3122                 return -ENOBUFS;
3123         }
3124
3125         return genlmsg_reply(msg, info);
3126 }
3127
3128 /*
3129  * Get vlan interface making sure it is running and on the right wiphy.
3130  */
3131 static struct net_device *get_vlan(struct genl_info *info,
3132                                    struct cfg80211_registered_device *rdev)
3133 {
3134         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3135         struct net_device *v;
3136         int ret;
3137
3138         if (!vlanattr)
3139                 return NULL;
3140
3141         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3142         if (!v)
3143                 return ERR_PTR(-ENODEV);
3144
3145         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3146                 ret = -EINVAL;
3147                 goto error;
3148         }
3149
3150         if (!netif_running(v)) {
3151                 ret = -ENETDOWN;
3152                 goto error;
3153         }
3154
3155         return v;
3156  error:
3157         dev_put(v);
3158         return ERR_PTR(ret);
3159 }
3160
3161 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3162 {
3163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3164         int err;
3165         struct net_device *dev = info->user_ptr[1];
3166         struct station_parameters params;
3167         u8 *mac_addr = NULL;
3168
3169         memset(&params, 0, sizeof(params));
3170
3171         params.listen_interval = -1;
3172         params.plink_state = -1;
3173
3174         if (info->attrs[NL80211_ATTR_STA_AID])
3175                 return -EINVAL;
3176
3177         if (!info->attrs[NL80211_ATTR_MAC])
3178                 return -EINVAL;
3179
3180         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3181
3182         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3183                 params.supported_rates =
3184                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3185                 params.supported_rates_len =
3186                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3187         }
3188
3189         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3190                 params.listen_interval =
3191                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3192
3193         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3194                 params.ht_capa =
3195                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3196
3197         if (!rdev->ops->change_station)
3198                 return -EOPNOTSUPP;
3199
3200         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3201                 return -EINVAL;
3202
3203         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3204                 params.plink_action =
3205                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3206
3207         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3208                 params.plink_state =
3209                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3210
3211         switch (dev->ieee80211_ptr->iftype) {
3212         case NL80211_IFTYPE_AP:
3213         case NL80211_IFTYPE_AP_VLAN:
3214         case NL80211_IFTYPE_P2P_GO:
3215                 /* disallow mesh-specific things */
3216                 if (params.plink_action)
3217                         return -EINVAL;
3218
3219                 /* TDLS can't be set, ... */
3220                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3221                         return -EINVAL;
3222                 /*
3223                  * ... but don't bother the driver with it. This works around
3224                  * a hostapd/wpa_supplicant issue -- it always includes the
3225                  * TLDS_PEER flag in the mask even for AP mode.
3226                  */
3227                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3228
3229                 /* accept only the listed bits */
3230                 if (params.sta_flags_mask &
3231                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3232                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3233                                   BIT(NL80211_STA_FLAG_WME) |
3234                                   BIT(NL80211_STA_FLAG_MFP)))
3235                         return -EINVAL;
3236
3237                 /* must be last in here for error handling */
3238                 params.vlan = get_vlan(info, rdev);
3239                 if (IS_ERR(params.vlan))
3240                         return PTR_ERR(params.vlan);
3241                 break;
3242         case NL80211_IFTYPE_P2P_CLIENT:
3243         case NL80211_IFTYPE_STATION:
3244                 /*
3245                  * Don't allow userspace to change the TDLS_PEER flag,
3246                  * but silently ignore attempts to change it since we
3247                  * don't have state here to verify that it doesn't try
3248                  * to change the flag.
3249                  */
3250                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3251                 /* fall through */
3252         case NL80211_IFTYPE_ADHOC:
3253                 /* disallow things sta doesn't support */
3254                 if (params.plink_action)
3255                         return -EINVAL;
3256                 if (params.ht_capa)
3257                         return -EINVAL;
3258                 if (params.listen_interval >= 0)
3259                         return -EINVAL;
3260                 /* reject any changes other than AUTHORIZED */
3261                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3262                         return -EINVAL;
3263                 break;
3264         case NL80211_IFTYPE_MESH_POINT:
3265                 /* disallow things mesh doesn't support */
3266                 if (params.vlan)
3267                         return -EINVAL;
3268                 if (params.ht_capa)
3269                         return -EINVAL;
3270                 if (params.listen_interval >= 0)
3271                         return -EINVAL;
3272                 /*
3273                  * No special handling for TDLS here -- the userspace
3274                  * mesh code doesn't have this bug.
3275                  */
3276                 if (params.sta_flags_mask &
3277                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3278                                   BIT(NL80211_STA_FLAG_MFP) |
3279                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3280                         return -EINVAL;
3281                 break;
3282         default:
3283                 return -EOPNOTSUPP;
3284         }
3285
3286         /* be aware of params.vlan when changing code here */
3287
3288         err = rdev_change_station(rdev, dev, mac_addr, &params);
3289
3290         if (params.vlan)
3291                 dev_put(params.vlan);
3292
3293         return err;
3294 }
3295
3296 static struct nla_policy
3297 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3298         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3299         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3300 };
3301
3302 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3303 {
3304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3305         int err;
3306         struct net_device *dev = info->user_ptr[1];
3307         struct station_parameters params;
3308         u8 *mac_addr = NULL;
3309
3310         memset(&params, 0, sizeof(params));
3311
3312         if (!info->attrs[NL80211_ATTR_MAC])
3313                 return -EINVAL;
3314
3315         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3316                 return -EINVAL;
3317
3318         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3319                 return -EINVAL;
3320
3321         if (!info->attrs[NL80211_ATTR_STA_AID])
3322                 return -EINVAL;
3323
3324         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3325         params.supported_rates =
3326                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3327         params.supported_rates_len =
3328                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3329         params.listen_interval =
3330                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3331
3332         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3333         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3334                 return -EINVAL;
3335
3336         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3337                 params.ht_capa =
3338                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3339
3340         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3341                 params.vht_capa =
3342                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3343
3344         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3345                 params.plink_action =
3346                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3347
3348         if (!rdev->ops->add_station)
3349                 return -EOPNOTSUPP;
3350
3351         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3352                 return -EINVAL;
3353
3354         switch (dev->ieee80211_ptr->iftype) {
3355         case NL80211_IFTYPE_AP:
3356         case NL80211_IFTYPE_AP_VLAN:
3357         case NL80211_IFTYPE_P2P_GO:
3358                 /* parse WME attributes if sta is WME capable */
3359                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3360                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3361                     info->attrs[NL80211_ATTR_STA_WME]) {
3362                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3363                         struct nlattr *nla;
3364
3365                         nla = info->attrs[NL80211_ATTR_STA_WME];
3366                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3367                                                nl80211_sta_wme_policy);
3368                         if (err)
3369                                 return err;
3370
3371                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3372                                 params.uapsd_queues =
3373                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3374                         if (params.uapsd_queues &
3375                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3376                                 return -EINVAL;
3377
3378                         if (tb[NL80211_STA_WME_MAX_SP])
3379                                 params.max_sp =
3380                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3381
3382                         if (params.max_sp &
3383                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3384                                 return -EINVAL;
3385
3386                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3387                 }
3388                 /* TDLS peers cannot be added */
3389                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3390                         return -EINVAL;
3391                 /* but don't bother the driver with it */
3392                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3393
3394                 /* must be last in here for error handling */
3395                 params.vlan = get_vlan(info, rdev);
3396                 if (IS_ERR(params.vlan))
3397                         return PTR_ERR(params.vlan);
3398                 break;
3399         case NL80211_IFTYPE_MESH_POINT:
3400                 /* TDLS peers cannot be added */
3401                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3402                         return -EINVAL;
3403                 break;
3404         case NL80211_IFTYPE_STATION:
3405                 /* Only TDLS peers can be added */
3406                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3407                         return -EINVAL;
3408                 /* Can only add if TDLS ... */
3409                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3410                         return -EOPNOTSUPP;
3411                 /* ... with external setup is supported */
3412                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3413                         return -EOPNOTSUPP;
3414                 break;
3415         default:
3416                 return -EOPNOTSUPP;
3417         }
3418
3419         /* be aware of params.vlan when changing code here */
3420
3421         err = rdev_add_station(rdev, dev, mac_addr, &params);
3422
3423         if (params.vlan)
3424                 dev_put(params.vlan);
3425         return err;
3426 }
3427
3428 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3429 {
3430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3431         struct net_device *dev = info->user_ptr[1];
3432         u8 *mac_addr = NULL;
3433
3434         if (info->attrs[NL80211_ATTR_MAC])
3435                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3436
3437         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3438             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3439             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3440             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3441                 return -EINVAL;
3442
3443         if (!rdev->ops->del_station)
3444                 return -EOPNOTSUPP;
3445
3446         return rdev_del_station(rdev, dev, mac_addr);
3447 }
3448
3449 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3450                                 int flags, struct net_device *dev,
3451                                 u8 *dst, u8 *next_hop,
3452                                 struct mpath_info *pinfo)
3453 {
3454         void *hdr;
3455         struct nlattr *pinfoattr;
3456
3457         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3458         if (!hdr)
3459                 return -1;
3460
3461         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3462             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3463             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3464             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3465                 goto nla_put_failure;
3466
3467         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3468         if (!pinfoattr)
3469                 goto nla_put_failure;
3470         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3471             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3472                         pinfo->frame_qlen))
3473                 goto nla_put_failure;
3474         if (((pinfo->filled & MPATH_INFO_SN) &&
3475              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3476             ((pinfo->filled & MPATH_INFO_METRIC) &&
3477              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3478                          pinfo->metric)) ||
3479             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3480              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3481                          pinfo->exptime)) ||
3482             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3483              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3484                         pinfo->flags)) ||
3485             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3486              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3487                          pinfo->discovery_timeout)) ||
3488             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3489              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3490                         pinfo->discovery_retries)))
3491                 goto nla_put_failure;
3492
3493         nla_nest_end(msg, pinfoattr);
3494
3495         return genlmsg_end(msg, hdr);
3496
3497  nla_put_failure:
3498         genlmsg_cancel(msg, hdr);
3499         return -EMSGSIZE;
3500 }
3501
3502 static int nl80211_dump_mpath(struct sk_buff *skb,
3503                               struct netlink_callback *cb)
3504 {
3505         struct mpath_info pinfo;
3506         struct cfg80211_registered_device *dev;
3507         struct net_device *netdev;
3508         u8 dst[ETH_ALEN];
3509         u8 next_hop[ETH_ALEN];
3510         int path_idx = cb->args[1];
3511         int err;
3512
3513         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3514         if (err)
3515                 return err;
3516
3517         if (!dev->ops->dump_mpath) {
3518                 err = -EOPNOTSUPP;
3519                 goto out_err;
3520         }
3521
3522         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3523                 err = -EOPNOTSUPP;
3524                 goto out_err;
3525         }
3526
3527         while (1) {
3528                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3529                                       &pinfo);
3530                 if (err == -ENOENT)
3531                         break;
3532                 if (err)
3533                         goto out_err;
3534
3535                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3536                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3537                                        netdev, dst, next_hop,
3538                                        &pinfo) < 0)
3539                         goto out;
3540
3541                 path_idx++;
3542         }
3543
3544
3545  out:
3546         cb->args[1] = path_idx;
3547         err = skb->len;
3548  out_err:
3549         nl80211_finish_netdev_dump(dev);
3550         return err;
3551 }
3552
3553 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3554 {
3555         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3556         int err;
3557         struct net_device *dev = info->user_ptr[1];
3558         struct mpath_info pinfo;
3559         struct sk_buff *msg;
3560         u8 *dst = NULL;
3561         u8 next_hop[ETH_ALEN];
3562
3563         memset(&pinfo, 0, sizeof(pinfo));
3564
3565         if (!info->attrs[NL80211_ATTR_MAC])
3566                 return -EINVAL;
3567
3568         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3569
3570         if (!rdev->ops->get_mpath)
3571                 return -EOPNOTSUPP;
3572
3573         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3574                 return -EOPNOTSUPP;
3575
3576         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3577         if (err)
3578                 return err;
3579
3580         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3581         if (!msg)
3582                 return -ENOMEM;
3583
3584         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3585                                  dev, dst, next_hop, &pinfo) < 0) {
3586                 nlmsg_free(msg);
3587                 return -ENOBUFS;
3588         }
3589
3590         return genlmsg_reply(msg, info);
3591 }
3592
3593 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3594 {
3595         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3596         struct net_device *dev = info->user_ptr[1];
3597         u8 *dst = NULL;
3598         u8 *next_hop = NULL;
3599
3600         if (!info->attrs[NL80211_ATTR_MAC])
3601                 return -EINVAL;
3602
3603         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3604                 return -EINVAL;
3605
3606         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3607         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3608
3609         if (!rdev->ops->change_mpath)
3610                 return -EOPNOTSUPP;
3611
3612         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3613                 return -EOPNOTSUPP;
3614
3615         return rdev_change_mpath(rdev, dev, dst, next_hop);
3616 }
3617
3618 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3619 {
3620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3621         struct net_device *dev = info->user_ptr[1];
3622         u8 *dst = NULL;
3623         u8 *next_hop = NULL;
3624
3625         if (!info->attrs[NL80211_ATTR_MAC])
3626                 return -EINVAL;
3627
3628         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3629                 return -EINVAL;
3630
3631         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3632         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3633
3634         if (!rdev->ops->add_mpath)
3635                 return -EOPNOTSUPP;
3636
3637         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3638                 return -EOPNOTSUPP;
3639
3640         return rdev_add_mpath(rdev, dev, dst, next_hop);
3641 }
3642
3643 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3644 {
3645         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3646         struct net_device *dev = info->user_ptr[1];
3647         u8 *dst = NULL;
3648
3649         if (info->attrs[NL80211_ATTR_MAC])
3650                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3651
3652         if (!rdev->ops->del_mpath)
3653                 return -EOPNOTSUPP;
3654
3655         return rdev_del_mpath(rdev, dev, dst);
3656 }
3657
3658 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3659 {
3660         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3661         struct net_device *dev = info->user_ptr[1];
3662         struct bss_parameters params;
3663
3664         memset(&params, 0, sizeof(params));
3665         /* default to not changing parameters */
3666         params.use_cts_prot = -1;
3667         params.use_short_preamble = -1;
3668         params.use_short_slot_time = -1;
3669         params.ap_isolate = -1;
3670         params.ht_opmode = -1;
3671
3672         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3673                 params.use_cts_prot =
3674                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3675         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3676                 params.use_short_preamble =
3677                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3678         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3679                 params.use_short_slot_time =
3680                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3681         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3682                 params.basic_rates =
3683                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3684                 params.basic_rates_len =
3685                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3686         }
3687         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3688                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3689         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3690                 params.ht_opmode =
3691                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3692
3693         if (!rdev->ops->change_bss)
3694                 return -EOPNOTSUPP;
3695
3696         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3697             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3698                 return -EOPNOTSUPP;
3699
3700         return rdev_change_bss(rdev, dev, &params);
3701 }
3702
3703 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3704         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3705         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3706         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3707         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3708         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3709         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3710 };
3711
3712 static int parse_reg_rule(struct nlattr *tb[],
3713         struct ieee80211_reg_rule *reg_rule)
3714 {
3715         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3716         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3717
3718         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3719                 return -EINVAL;
3720         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3721                 return -EINVAL;
3722         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3723                 return -EINVAL;
3724         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3725                 return -EINVAL;
3726         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3727                 return -EINVAL;
3728
3729         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3730
3731         freq_range->start_freq_khz =
3732                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3733         freq_range->end_freq_khz =
3734                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3735         freq_range->max_bandwidth_khz =
3736                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3737
3738         power_rule->max_eirp =
3739                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3740
3741         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3742                 power_rule->max_antenna_gain =
3743                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3744
3745         return 0;
3746 }
3747
3748 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3749 {
3750         int r;
3751         char *data = NULL;
3752         enum nl80211_user_reg_hint_type user_reg_hint_type;
3753
3754         /*
3755          * You should only get this when cfg80211 hasn't yet initialized
3756          * completely when built-in to the kernel right between the time
3757          * window between nl80211_init() and regulatory_init(), if that is
3758          * even possible.
3759          */
3760         mutex_lock(&cfg80211_mutex);
3761         if (unlikely(!cfg80211_regdomain)) {
3762                 mutex_unlock(&cfg80211_mutex);
3763                 return -EINPROGRESS;
3764         }
3765         mutex_unlock(&cfg80211_mutex);
3766
3767         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3768                 return -EINVAL;
3769
3770         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3771
3772         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
3773                 user_reg_hint_type =
3774                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
3775         else
3776                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
3777
3778         switch (user_reg_hint_type) {
3779         case NL80211_USER_REG_HINT_USER:
3780         case NL80211_USER_REG_HINT_CELL_BASE:
3781                 break;
3782         default:
3783                 return -EINVAL;
3784         }
3785
3786         r = regulatory_hint_user(data, user_reg_hint_type);
3787
3788         return r;
3789 }
3790
3791 static int nl80211_get_mesh_config(struct sk_buff *skb,
3792                                    struct genl_info *info)
3793 {
3794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3795         struct net_device *dev = info->user_ptr[1];
3796         struct wireless_dev *wdev = dev->ieee80211_ptr;
3797         struct mesh_config cur_params;
3798         int err = 0;
3799         void *hdr;
3800         struct nlattr *pinfoattr;
3801         struct sk_buff *msg;
3802
3803         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3804                 return -EOPNOTSUPP;
3805
3806         if (!rdev->ops->get_mesh_config)
3807                 return -EOPNOTSUPP;
3808
3809         wdev_lock(wdev);
3810         /* If not connected, get default parameters */
3811         if (!wdev->mesh_id_len)
3812                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3813         else
3814                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
3815         wdev_unlock(wdev);
3816
3817         if (err)
3818                 return err;
3819
3820         /* Draw up a netlink message to send back */
3821         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3822         if (!msg)
3823                 return -ENOMEM;
3824         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3825                              NL80211_CMD_GET_MESH_CONFIG);
3826         if (!hdr)
3827                 goto out;
3828         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3829         if (!pinfoattr)
3830                 goto nla_put_failure;
3831         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3832             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3833                         cur_params.dot11MeshRetryTimeout) ||
3834             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3835                         cur_params.dot11MeshConfirmTimeout) ||
3836             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3837                         cur_params.dot11MeshHoldingTimeout) ||
3838             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3839                         cur_params.dot11MeshMaxPeerLinks) ||
3840             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3841                        cur_params.dot11MeshMaxRetries) ||
3842             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3843                        cur_params.dot11MeshTTL) ||
3844             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3845                        cur_params.element_ttl) ||
3846             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3847                        cur_params.auto_open_plinks) ||
3848             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3849                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3850             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3851                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3852             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3853                         cur_params.path_refresh_time) ||
3854             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3855                         cur_params.min_discovery_timeout) ||
3856             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3857                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3858             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3859                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3860             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3861                         cur_params.dot11MeshHWMPperrMinInterval) ||
3862             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3863                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3864             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3865                        cur_params.dot11MeshHWMPRootMode) ||
3866             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3867                         cur_params.dot11MeshHWMPRannInterval) ||
3868             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3869                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3870             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3871                        cur_params.dot11MeshForwarding) ||
3872             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3873                         cur_params.rssi_threshold) ||
3874             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3875                         cur_params.ht_opmode) ||
3876             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3877                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3878             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3879                         cur_params.dot11MeshHWMProotInterval) ||
3880             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3881                         cur_params.dot11MeshHWMPconfirmationInterval))
3882                 goto nla_put_failure;
3883         nla_nest_end(msg, pinfoattr);
3884         genlmsg_end(msg, hdr);
3885         return genlmsg_reply(msg, info);
3886
3887  nla_put_failure:
3888         genlmsg_cancel(msg, hdr);
3889  out:
3890         nlmsg_free(msg);
3891         return -ENOBUFS;
3892 }
3893
3894 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3895         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3896         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3897         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3898         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3899         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3900         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3901         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3902         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3903         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3904         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3905         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3906         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3907         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3908         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3909         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3910         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3911         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3912         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3913         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3914         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3915         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3916         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3917         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3918         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3919         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3920 };
3921
3922 static const struct nla_policy
3923         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3924         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3925         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3926         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3927         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3928         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3929                                     .len = IEEE80211_MAX_DATA_LEN },
3930         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3931 };
3932
3933 static int nl80211_parse_mesh_config(struct genl_info *info,
3934                                      struct mesh_config *cfg,
3935                                      u32 *mask_out)
3936 {
3937         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3938         u32 mask = 0;
3939
3940 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3941 do {\
3942         if (table[attr_num]) {\
3943                 cfg->param = nla_fn(table[attr_num]); \
3944                 mask |= (1 << (attr_num - 1)); \
3945         } \
3946 } while (0);\
3947
3948
3949         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3950                 return -EINVAL;
3951         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3952                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3953                              nl80211_meshconf_params_policy))
3954                 return -EINVAL;
3955
3956         /* This makes sure that there aren't more than 32 mesh config
3957          * parameters (otherwise our bitfield scheme would not work.) */
3958         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3959
3960         /* Fill in the params struct */
3961         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3962                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3963                                   nla_get_u16);
3964         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3965                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3966                                   nla_get_u16);
3967         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3968                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3969                                   nla_get_u16);
3970         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3971                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3972                                   nla_get_u16);
3973         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3974                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3975                                   nla_get_u8);
3976         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3977                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3978         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3979                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3980                                   nla_get_u8);
3981         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3982                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3983                                   nla_get_u8);
3984         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3985                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3986                                   nla_get_u32);
3987         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3988                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3989                                   nla_get_u8);
3990         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3991                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3992                                   nla_get_u32);
3993         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3994                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3995                                   nla_get_u16);
3996         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3997                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3998                                   nla_get_u32);
3999         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4000                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4001                                   nla_get_u16);
4002         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4003                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4004                                   nla_get_u16);
4005         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4006                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
4007                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4008                                   nla_get_u16);
4009         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
4010                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
4011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
4012                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4013                                   nla_get_u16);
4014         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4015                                   dot11MeshGateAnnouncementProtocol, mask,
4016                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4017                                   nla_get_u8);
4018         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
4019                                   mask, NL80211_MESHCONF_FORWARDING,
4020                                   nla_get_u8);
4021         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
4022                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4023                                   nla_get_u32);
4024         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
4025                                   mask, NL80211_MESHCONF_HT_OPMODE,
4026                                   nla_get_u16);
4027         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4028                                   mask,
4029                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4030                                   nla_get_u32);
4031         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
4032                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4033                                   nla_get_u16);
4034         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4035                                   dot11MeshHWMPconfirmationInterval, mask,
4036                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4037                                   nla_get_u16);
4038         if (mask_out)
4039                 *mask_out = mask;
4040
4041         return 0;
4042
4043 #undef FILL_IN_MESH_PARAM_IF_SET
4044 }
4045
4046 static int nl80211_parse_mesh_setup(struct genl_info *info,
4047                                      struct mesh_setup *setup)
4048 {
4049         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4050
4051         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4052                 return -EINVAL;
4053         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4054                              info->attrs[NL80211_ATTR_MESH_SETUP],
4055                              nl80211_mesh_setup_params_policy))
4056                 return -EINVAL;
4057
4058         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4059                 setup->sync_method =
4060                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4061                  IEEE80211_SYNC_METHOD_VENDOR :
4062                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4063
4064         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4065                 setup->path_sel_proto =
4066                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4067                  IEEE80211_PATH_PROTOCOL_VENDOR :
4068                  IEEE80211_PATH_PROTOCOL_HWMP;
4069
4070         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4071                 setup->path_metric =
4072                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4073                  IEEE80211_PATH_METRIC_VENDOR :
4074                  IEEE80211_PATH_METRIC_AIRTIME;
4075
4076
4077         if (tb[NL80211_MESH_SETUP_IE]) {
4078                 struct nlattr *ieattr =
4079                         tb[NL80211_MESH_SETUP_IE];
4080                 if (!is_valid_ie_attr(ieattr))
4081                         return -EINVAL;
4082                 setup->ie = nla_data(ieattr);
4083                 setup->ie_len = nla_len(ieattr);
4084         }
4085         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4086         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4087
4088         return 0;
4089 }
4090
4091 static int nl80211_update_mesh_config(struct sk_buff *skb,
4092                                       struct genl_info *info)
4093 {
4094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4095         struct net_device *dev = info->user_ptr[1];
4096         struct wireless_dev *wdev = dev->ieee80211_ptr;
4097         struct mesh_config cfg;
4098         u32 mask;
4099         int err;
4100
4101         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4102                 return -EOPNOTSUPP;
4103
4104         if (!rdev->ops->update_mesh_config)
4105                 return -EOPNOTSUPP;
4106
4107         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4108         if (err)
4109                 return err;
4110
4111         wdev_lock(wdev);
4112         if (!wdev->mesh_id_len)
4113                 err = -ENOLINK;
4114
4115         if (!err)
4116                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4117
4118         wdev_unlock(wdev);
4119
4120         return err;
4121 }
4122
4123 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4124 {
4125         struct sk_buff *msg;
4126         void *hdr = NULL;
4127         struct nlattr *nl_reg_rules;
4128         unsigned int i;
4129         int err = -EINVAL;
4130
4131         mutex_lock(&cfg80211_mutex);
4132
4133         if (!cfg80211_regdomain)
4134                 goto out;
4135
4136         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4137         if (!msg) {
4138                 err = -ENOBUFS;
4139                 goto out;
4140         }
4141
4142         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4143                              NL80211_CMD_GET_REG);
4144         if (!hdr)
4145                 goto put_failure;
4146
4147         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
4148                            cfg80211_regdomain->alpha2) ||
4149             (cfg80211_regdomain->dfs_region &&
4150              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
4151                         cfg80211_regdomain->dfs_region)))
4152                 goto nla_put_failure;
4153
4154         if (reg_last_request_cell_base() &&
4155             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4156                         NL80211_USER_REG_HINT_CELL_BASE))
4157                 goto nla_put_failure;
4158
4159         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4160         if (!nl_reg_rules)
4161                 goto nla_put_failure;
4162
4163         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
4164                 struct nlattr *nl_reg_rule;
4165                 const struct ieee80211_reg_rule *reg_rule;
4166                 const struct ieee80211_freq_range *freq_range;
4167                 const struct ieee80211_power_rule *power_rule;
4168
4169                 reg_rule = &cfg80211_regdomain->reg_rules[i];
4170                 freq_range = &reg_rule->freq_range;
4171                 power_rule = &reg_rule->power_rule;
4172
4173                 nl_reg_rule = nla_nest_start(msg, i);
4174                 if (!nl_reg_rule)
4175                         goto nla_put_failure;
4176
4177                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4178                                 reg_rule->flags) ||
4179                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4180                                 freq_range->start_freq_khz) ||
4181                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4182                                 freq_range->end_freq_khz) ||
4183                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4184                                 freq_range->max_bandwidth_khz) ||
4185                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4186                                 power_rule->max_antenna_gain) ||
4187                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4188                                 power_rule->max_eirp))
4189                         goto nla_put_failure;
4190
4191                 nla_nest_end(msg, nl_reg_rule);
4192         }
4193
4194         nla_nest_end(msg, nl_reg_rules);
4195
4196         genlmsg_end(msg, hdr);
4197         err = genlmsg_reply(msg, info);
4198         goto out;
4199
4200 nla_put_failure:
4201         genlmsg_cancel(msg, hdr);
4202 put_failure:
4203         nlmsg_free(msg);
4204         err = -EMSGSIZE;
4205 out:
4206         mutex_unlock(&cfg80211_mutex);
4207         return err;
4208 }
4209
4210 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4211 {
4212         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4213         struct nlattr *nl_reg_rule;
4214         char *alpha2 = NULL;
4215         int rem_reg_rules = 0, r = 0;
4216         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4217         u8 dfs_region = 0;
4218         struct ieee80211_regdomain *rd = NULL;
4219
4220         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4221                 return -EINVAL;
4222
4223         if (!info->attrs[NL80211_ATTR_REG_RULES])
4224                 return -EINVAL;
4225
4226         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4227
4228         if (info->attrs[NL80211_ATTR_DFS_REGION])
4229                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4230
4231         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4232                         rem_reg_rules) {
4233                 num_rules++;
4234                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4235                         return -EINVAL;
4236         }
4237
4238         mutex_lock(&cfg80211_mutex);
4239
4240         if (!reg_is_valid_request(alpha2)) {
4241                 r = -EINVAL;
4242                 goto bad_reg;
4243         }
4244
4245         size_of_regd = sizeof(struct ieee80211_regdomain) +
4246                 (num_rules * sizeof(struct ieee80211_reg_rule));
4247
4248         rd = kzalloc(size_of_regd, GFP_KERNEL);
4249         if (!rd) {
4250                 r = -ENOMEM;
4251                 goto bad_reg;
4252         }
4253
4254         rd->n_reg_rules = num_rules;
4255         rd->alpha2[0] = alpha2[0];
4256         rd->alpha2[1] = alpha2[1];
4257
4258         /*
4259          * Disable DFS master mode if the DFS region was
4260          * not supported or known on this kernel.
4261          */
4262         if (reg_supported_dfs_region(dfs_region))
4263                 rd->dfs_region = dfs_region;
4264
4265         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4266                         rem_reg_rules) {
4267                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4268                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4269                         reg_rule_policy);
4270                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4271                 if (r)
4272                         goto bad_reg;
4273
4274                 rule_idx++;
4275
4276                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4277                         r = -EINVAL;
4278                         goto bad_reg;
4279                 }
4280         }
4281
4282         BUG_ON(rule_idx != num_rules);
4283
4284         r = set_regdom(rd);
4285
4286         mutex_unlock(&cfg80211_mutex);
4287
4288         return r;
4289
4290  bad_reg:
4291         mutex_unlock(&cfg80211_mutex);
4292         kfree(rd);
4293         return r;
4294 }
4295
4296 static int validate_scan_freqs(struct nlattr *freqs)
4297 {
4298         struct nlattr *attr1, *attr2;
4299         int n_channels = 0, tmp1, tmp2;
4300
4301         nla_for_each_nested(attr1, freqs, tmp1) {
4302                 n_channels++;
4303                 /*
4304                  * Some hardware has a limited channel list for
4305                  * scanning, and it is pretty much nonsensical
4306                  * to scan for a channel twice, so disallow that
4307                  * and don't require drivers to check that the
4308                  * channel list they get isn't longer than what
4309                  * they can scan, as long as they can scan all
4310                  * the channels they registered at once.
4311                  */
4312                 nla_for_each_nested(attr2, freqs, tmp2)
4313                         if (attr1 != attr2 &&
4314                             nla_get_u32(attr1) == nla_get_u32(attr2))
4315                                 return 0;
4316         }
4317
4318         return n_channels;
4319 }
4320
4321 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4322 {
4323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4324         struct wireless_dev *wdev = info->user_ptr[1];
4325         struct cfg80211_scan_request *request;
4326         struct nlattr *attr;
4327         struct wiphy *wiphy;
4328         int err, tmp, n_ssids = 0, n_channels, i;
4329         size_t ie_len;
4330
4331         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4332                 return -EINVAL;
4333
4334         wiphy = &rdev->wiphy;
4335
4336         if (!rdev->ops->scan)
4337                 return -EOPNOTSUPP;
4338
4339         if (rdev->scan_req)
4340                 return -EBUSY;
4341
4342         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4343                 n_channels = validate_scan_freqs(
4344                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4345                 if (!n_channels)
4346                         return -EINVAL;
4347         } else {
4348                 enum ieee80211_band band;
4349                 n_channels = 0;
4350
4351                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4352                         if (wiphy->bands[band])
4353                                 n_channels += wiphy->bands[band]->n_channels;
4354         }
4355
4356         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4357                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4358                         n_ssids++;
4359
4360         if (n_ssids > wiphy->max_scan_ssids)
4361                 return -EINVAL;
4362
4363         if (info->attrs[NL80211_ATTR_IE])
4364                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4365         else
4366                 ie_len = 0;
4367
4368         if (ie_len > wiphy->max_scan_ie_len)
4369                 return -EINVAL;
4370
4371         request = kzalloc(sizeof(*request)
4372                         + sizeof(*request->ssids) * n_ssids
4373                         + sizeof(*request->channels) * n_channels
4374                         + ie_len, GFP_KERNEL);
4375         if (!request)
4376                 return -ENOMEM;
4377
4378         if (n_ssids)
4379                 request->ssids = (void *)&request->channels[n_channels];
4380         request->n_ssids = n_ssids;
4381         if (ie_len) {
4382                 if (request->ssids)
4383                         request->ie = (void *)(request->ssids + n_ssids);
4384                 else
4385                         request->ie = (void *)(request->channels + n_channels);
4386         }
4387
4388         i = 0;
4389         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4390                 /* user specified, bail out if channel not found */
4391                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4392                         struct ieee80211_channel *chan;
4393
4394                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4395
4396                         if (!chan) {
4397                                 err = -EINVAL;
4398                                 goto out_free;
4399                         }
4400
4401                         /* ignore disabled channels */
4402                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4403                                 continue;
4404
4405                         request->channels[i] = chan;
4406                         i++;
4407                 }
4408         } else {
4409                 enum ieee80211_band band;
4410
4411                 /* all channels */
4412                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4413                         int j;
4414                         if (!wiphy->bands[band])
4415                                 continue;
4416                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4417                                 struct ieee80211_channel *chan;
4418
4419                                 chan = &wiphy->bands[band]->channels[j];
4420
4421                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4422                                         continue;
4423
4424                                 request->channels[i] = chan;
4425                                 i++;
4426                         }
4427                 }
4428         }
4429
4430         if (!i) {
4431                 err = -EINVAL;
4432                 goto out_free;
4433         }
4434
4435         request->n_channels = i;
4436
4437         i = 0;
4438         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4439                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4440                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4441                                 err = -EINVAL;
4442                                 goto out_free;
4443                         }
4444                         request->ssids[i].ssid_len = nla_len(attr);
4445                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4446                         i++;
4447                 }
4448         }
4449
4450         if (info->attrs[NL80211_ATTR_IE]) {
4451                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4452                 memcpy((void *)request->ie,
4453                        nla_data(info->attrs[NL80211_ATTR_IE]),
4454                        request->ie_len);
4455         }
4456
4457         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4458                 if (wiphy->bands[i])
4459                         request->rates[i] =
4460                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4461
4462         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4463                 nla_for_each_nested(attr,
4464                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4465                                     tmp) {
4466                         enum ieee80211_band band = nla_type(attr);
4467
4468                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4469                                 err = -EINVAL;
4470                                 goto out_free;
4471                         }
4472                         err = ieee80211_get_ratemask(wiphy->bands[band],
4473                                                      nla_data(attr),
4474                                                      nla_len(attr),
4475                                                      &request->rates[band]);
4476                         if (err)
4477                                 goto out_free;
4478                 }
4479         }
4480
4481         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4482                 request->flags = nla_get_u32(
4483                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4484                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4485                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4486                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4487                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4488                         err = -EOPNOTSUPP;
4489                         goto out_free;
4490                 }
4491         }
4492
4493         request->no_cck =
4494                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4495
4496         request->wdev = wdev;
4497         request->wiphy = &rdev->wiphy;
4498         request->scan_start = jiffies;
4499
4500         rdev->scan_req = request;
4501         err = rdev_scan(rdev, request);
4502
4503         if (!err) {
4504                 nl80211_send_scan_start(rdev, wdev);
4505                 if (wdev->netdev)
4506                         dev_hold(wdev->netdev);
4507         } else {
4508  out_free:
4509                 rdev->scan_req = NULL;
4510                 kfree(request);
4511         }
4512
4513         return err;
4514 }
4515
4516 static int nl80211_start_sched_scan(struct sk_buff *skb,
4517                                     struct genl_info *info)
4518 {
4519         struct cfg80211_sched_scan_request *request;
4520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4521         struct net_device *dev = info->user_ptr[1];
4522         struct nlattr *attr;
4523         struct wiphy *wiphy;
4524         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4525         u32 interval;
4526         enum ieee80211_band band;
4527         size_t ie_len;
4528         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4529
4530         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4531             !rdev->ops->sched_scan_start)
4532                 return -EOPNOTSUPP;
4533
4534         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4535                 return -EINVAL;
4536
4537         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4538                 return -EINVAL;
4539
4540         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4541         if (interval == 0)
4542                 return -EINVAL;
4543
4544         wiphy = &rdev->wiphy;
4545
4546         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4547                 n_channels = validate_scan_freqs(
4548                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4549                 if (!n_channels)
4550                         return -EINVAL;
4551         } else {
4552                 n_channels = 0;
4553
4554                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4555                         if (wiphy->bands[band])
4556                                 n_channels += wiphy->bands[band]->n_channels;
4557         }
4558
4559         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4560                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4561                                     tmp)
4562                         n_ssids++;
4563
4564         if (n_ssids > wiphy->max_sched_scan_ssids)
4565                 return -EINVAL;
4566
4567         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4568                 nla_for_each_nested(attr,
4569                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4570                                     tmp)
4571                         n_match_sets++;
4572
4573         if (n_match_sets > wiphy->max_match_sets)
4574                 return -EINVAL;
4575
4576         if (info->attrs[NL80211_ATTR_IE])
4577                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4578         else
4579                 ie_len = 0;
4580
4581         if (ie_len > wiphy->max_sched_scan_ie_len)
4582                 return -EINVAL;
4583
4584         mutex_lock(&rdev->sched_scan_mtx);
4585
4586         if (rdev->sched_scan_req) {
4587                 err = -EINPROGRESS;
4588                 goto out;
4589         }
4590
4591         request = kzalloc(sizeof(*request)
4592                         + sizeof(*request->ssids) * n_ssids
4593                         + sizeof(*request->match_sets) * n_match_sets
4594                         + sizeof(*request->channels) * n_channels
4595                         + ie_len, GFP_KERNEL);
4596         if (!request) {
4597                 err = -ENOMEM;
4598                 goto out;
4599         }
4600
4601         if (n_ssids)
4602                 request->ssids = (void *)&request->channels[n_channels];
4603         request->n_ssids = n_ssids;
4604         if (ie_len) {
4605                 if (request->ssids)
4606                         request->ie = (void *)(request->ssids + n_ssids);
4607                 else
4608                         request->ie = (void *)(request->channels + n_channels);
4609         }
4610
4611         if (n_match_sets) {
4612                 if (request->ie)
4613                         request->match_sets = (void *)(request->ie + ie_len);
4614                 else if (request->ssids)
4615                         request->match_sets =
4616                                 (void *)(request->ssids + n_ssids);
4617                 else
4618                         request->match_sets =
4619                                 (void *)(request->channels + n_channels);
4620         }
4621         request->n_match_sets = n_match_sets;
4622
4623         i = 0;
4624         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4625                 /* user specified, bail out if channel not found */
4626                 nla_for_each_nested(attr,
4627                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4628                                     tmp) {
4629                         struct ieee80211_channel *chan;
4630
4631                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4632
4633                         if (!chan) {
4634                                 err = -EINVAL;
4635                                 goto out_free;
4636                         }
4637
4638                         /* ignore disabled channels */
4639                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4640                                 continue;
4641
4642                         request->channels[i] = chan;
4643                         i++;
4644                 }
4645         } else {
4646                 /* all channels */
4647                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4648                         int j;
4649                         if (!wiphy->bands[band])
4650                                 continue;
4651                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4652                                 struct ieee80211_channel *chan;
4653
4654                                 chan = &wiphy->bands[band]->channels[j];
4655
4656                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4657                                         continue;
4658
4659                                 request->channels[i] = chan;
4660                                 i++;
4661                         }
4662                 }
4663         }
4664
4665         if (!i) {
4666                 err = -EINVAL;
4667                 goto out_free;
4668         }
4669
4670         request->n_channels = i;
4671
4672         i = 0;
4673         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4674                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4675                                     tmp) {
4676                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4677                                 err = -EINVAL;
4678                                 goto out_free;
4679                         }
4680                         request->ssids[i].ssid_len = nla_len(attr);
4681                         memcpy(request->ssids[i].ssid, nla_data(attr),
4682                                nla_len(attr));
4683                         i++;
4684                 }
4685         }
4686
4687         i = 0;
4688         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4689                 nla_for_each_nested(attr,
4690                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4691                                     tmp) {
4692                         struct nlattr *ssid, *rssi;
4693
4694                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4695                                   nla_data(attr), nla_len(attr),
4696                                   nl80211_match_policy);
4697                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4698                         if (ssid) {
4699                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4700                                         err = -EINVAL;
4701                                         goto out_free;
4702                                 }
4703                                 memcpy(request->match_sets[i].ssid.ssid,
4704                                        nla_data(ssid), nla_len(ssid));
4705                                 request->match_sets[i].ssid.ssid_len =
4706                                         nla_len(ssid);
4707                         }
4708                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4709                         if (rssi)
4710                                 request->rssi_thold = nla_get_u32(rssi);
4711                         else
4712                                 request->rssi_thold =
4713                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4714                         i++;
4715                 }
4716         }
4717
4718         if (info->attrs[NL80211_ATTR_IE]) {
4719                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4720                 memcpy((void *)request->ie,
4721                        nla_data(info->attrs[NL80211_ATTR_IE]),
4722                        request->ie_len);
4723         }
4724
4725         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4726                 request->flags = nla_get_u32(
4727                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4728                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4729                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4730                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4731                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4732                         err = -EOPNOTSUPP;
4733                         goto out_free;
4734                 }
4735         }
4736
4737         request->dev = dev;
4738         request->wiphy = &rdev->wiphy;
4739         request->interval = interval;
4740         request->scan_start = jiffies;
4741
4742         err = rdev_sched_scan_start(rdev, dev, request);
4743         if (!err) {
4744                 rdev->sched_scan_req = request;
4745                 nl80211_send_sched_scan(rdev, dev,
4746                                         NL80211_CMD_START_SCHED_SCAN);
4747                 goto out;
4748         }
4749
4750 out_free:
4751         kfree(request);
4752 out:
4753         mutex_unlock(&rdev->sched_scan_mtx);
4754         return err;
4755 }
4756
4757 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4758                                    struct genl_info *info)
4759 {
4760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4761         int err;
4762
4763         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4764             !rdev->ops->sched_scan_stop)
4765                 return -EOPNOTSUPP;
4766
4767         mutex_lock(&rdev->sched_scan_mtx);
4768         err = __cfg80211_stop_sched_scan(rdev, false);
4769         mutex_unlock(&rdev->sched_scan_mtx);
4770
4771         return err;
4772 }
4773
4774 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4775                             u32 seq, int flags,
4776                             struct cfg80211_registered_device *rdev,
4777                             struct wireless_dev *wdev,
4778                             struct cfg80211_internal_bss *intbss)
4779 {
4780         struct cfg80211_bss *res = &intbss->pub;
4781         void *hdr;
4782         struct nlattr *bss;
4783
4784         ASSERT_WDEV_LOCK(wdev);
4785
4786         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
4787                              NL80211_CMD_NEW_SCAN_RESULTS);
4788         if (!hdr)
4789                 return -1;
4790
4791         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4792
4793         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4794             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4795                 goto nla_put_failure;
4796
4797         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4798         if (!bss)
4799                 goto nla_put_failure;
4800         if ((!is_zero_ether_addr(res->bssid) &&
4801              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4802             (res->information_elements && res->len_information_elements &&
4803              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4804                      res->len_information_elements,
4805                      res->information_elements)) ||
4806             (res->beacon_ies && res->len_beacon_ies &&
4807              res->beacon_ies != res->information_elements &&
4808              nla_put(msg, NL80211_BSS_BEACON_IES,
4809                      res->len_beacon_ies, res->beacon_ies)))
4810                 goto nla_put_failure;
4811         if (res->tsf &&
4812             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4813                 goto nla_put_failure;
4814         if (res->beacon_interval &&
4815             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4816                 goto nla_put_failure;
4817         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4818             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4819             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4820                         jiffies_to_msecs(jiffies - intbss->ts)))
4821                 goto nla_put_failure;
4822
4823         switch (rdev->wiphy.signal_type) {
4824         case CFG80211_SIGNAL_TYPE_MBM:
4825                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4826                         goto nla_put_failure;
4827                 break;
4828         case CFG80211_SIGNAL_TYPE_UNSPEC:
4829                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4830                         goto nla_put_failure;
4831                 break;
4832         default:
4833                 break;
4834         }
4835
4836         switch (wdev->iftype) {
4837         case NL80211_IFTYPE_P2P_CLIENT:
4838         case NL80211_IFTYPE_STATION:
4839                 if (intbss == wdev->current_bss &&
4840                     nla_put_u32(msg, NL80211_BSS_STATUS,
4841                                 NL80211_BSS_STATUS_ASSOCIATED))
4842                         goto nla_put_failure;
4843                 break;
4844         case NL80211_IFTYPE_ADHOC:
4845                 if (intbss == wdev->current_bss &&
4846                     nla_put_u32(msg, NL80211_BSS_STATUS,
4847                                 NL80211_BSS_STATUS_IBSS_JOINED))
4848                         goto nla_put_failure;
4849                 break;
4850         default:
4851                 break;
4852         }
4853
4854         nla_nest_end(msg, bss);
4855
4856         return genlmsg_end(msg, hdr);
4857
4858  nla_put_failure:
4859         genlmsg_cancel(msg, hdr);
4860         return -EMSGSIZE;
4861 }
4862
4863 static int nl80211_dump_scan(struct sk_buff *skb,
4864                              struct netlink_callback *cb)
4865 {
4866         struct cfg80211_registered_device *rdev;
4867         struct net_device *dev;
4868         struct cfg80211_internal_bss *scan;
4869         struct wireless_dev *wdev;
4870         int start = cb->args[1], idx = 0;
4871         int err;
4872
4873         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4874         if (err)
4875                 return err;
4876
4877         wdev = dev->ieee80211_ptr;
4878
4879         wdev_lock(wdev);
4880         spin_lock_bh(&rdev->bss_lock);
4881         cfg80211_bss_expire(rdev);
4882
4883         cb->seq = rdev->bss_generation;
4884
4885         list_for_each_entry(scan, &rdev->bss_list, list) {
4886                 if (++idx <= start)
4887                         continue;
4888                 if (nl80211_send_bss(skb, cb,
4889                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4890                                 rdev, wdev, scan) < 0) {
4891                         idx--;
4892                         break;
4893                 }
4894         }
4895
4896         spin_unlock_bh(&rdev->bss_lock);
4897         wdev_unlock(wdev);
4898
4899         cb->args[1] = idx;
4900         nl80211_finish_netdev_dump(rdev);
4901
4902         return skb->len;
4903 }
4904
4905 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
4906                                 int flags, struct net_device *dev,
4907                                 struct survey_info *survey)
4908 {
4909         void *hdr;
4910         struct nlattr *infoattr;
4911
4912         hdr = nl80211hdr_put(msg, portid, seq, flags,
4913                              NL80211_CMD_NEW_SURVEY_RESULTS);
4914         if (!hdr)
4915                 return -ENOMEM;
4916
4917         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4918                 goto nla_put_failure;
4919
4920         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4921         if (!infoattr)
4922                 goto nla_put_failure;
4923
4924         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4925                         survey->channel->center_freq))
4926                 goto nla_put_failure;
4927
4928         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4929             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4930                 goto nla_put_failure;
4931         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4932             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4933                 goto nla_put_failure;
4934         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4935             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4936                         survey->channel_time))
4937                 goto nla_put_failure;
4938         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4939             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4940                         survey->channel_time_busy))
4941                 goto nla_put_failure;
4942         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4943             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4944                         survey->channel_time_ext_busy))
4945                 goto nla_put_failure;
4946         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4947             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4948                         survey->channel_time_rx))
4949                 goto nla_put_failure;
4950         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4951             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4952                         survey->channel_time_tx))
4953                 goto nla_put_failure;
4954
4955         nla_nest_end(msg, infoattr);
4956
4957         return genlmsg_end(msg, hdr);
4958
4959  nla_put_failure:
4960         genlmsg_cancel(msg, hdr);
4961         return -EMSGSIZE;
4962 }
4963
4964 static int nl80211_dump_survey(struct sk_buff *skb,
4965                         struct netlink_callback *cb)
4966 {
4967         struct survey_info survey;
4968         struct cfg80211_registered_device *dev;
4969         struct net_device *netdev;
4970         int survey_idx = cb->args[1];
4971         int res;
4972
4973         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4974         if (res)
4975                 return res;
4976
4977         if (!dev->ops->dump_survey) {
4978                 res = -EOPNOTSUPP;
4979                 goto out_err;
4980         }
4981
4982         while (1) {
4983                 struct ieee80211_channel *chan;
4984
4985                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
4986                 if (res == -ENOENT)
4987                         break;
4988                 if (res)
4989                         goto out_err;
4990
4991                 /* Survey without a channel doesn't make sense */
4992                 if (!survey.channel) {
4993                         res = -EINVAL;
4994                         goto out;
4995                 }
4996
4997                 chan = ieee80211_get_channel(&dev->wiphy,
4998                                              survey.channel->center_freq);
4999                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5000                         survey_idx++;
5001                         continue;
5002                 }
5003
5004                 if (nl80211_send_survey(skb,
5005                                 NETLINK_CB(cb->skb).portid,
5006                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5007                                 netdev,
5008                                 &survey) < 0)
5009                         goto out;
5010                 survey_idx++;
5011         }
5012
5013  out:
5014         cb->args[1] = survey_idx;
5015         res = skb->len;
5016  out_err:
5017         nl80211_finish_netdev_dump(dev);
5018         return res;
5019 }
5020
5021 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5022 {
5023         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5024                                   NL80211_WPA_VERSION_2));
5025 }
5026
5027 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5028 {
5029         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5030         struct net_device *dev = info->user_ptr[1];
5031         struct ieee80211_channel *chan;
5032         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5033         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5034         enum nl80211_auth_type auth_type;
5035         struct key_parse key;
5036         bool local_state_change;
5037
5038         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5039                 return -EINVAL;
5040
5041         if (!info->attrs[NL80211_ATTR_MAC])
5042                 return -EINVAL;
5043
5044         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5045                 return -EINVAL;
5046
5047         if (!info->attrs[NL80211_ATTR_SSID])
5048                 return -EINVAL;
5049
5050         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5051                 return -EINVAL;
5052
5053         err = nl80211_parse_key(info, &key);
5054         if (err)
5055                 return err;
5056
5057         if (key.idx >= 0) {
5058                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5059                         return -EINVAL;
5060                 if (!key.p.key || !key.p.key_len)
5061                         return -EINVAL;
5062                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5063                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5064                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5065                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5066                         return -EINVAL;
5067                 if (key.idx > 4)
5068                         return -EINVAL;
5069         } else {
5070                 key.p.key_len = 0;
5071                 key.p.key = NULL;
5072         }
5073
5074         if (key.idx >= 0) {
5075                 int i;
5076                 bool ok = false;
5077                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5078                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5079                                 ok = true;
5080                                 break;
5081                         }
5082                 }
5083                 if (!ok)
5084                         return -EINVAL;
5085         }
5086
5087         if (!rdev->ops->auth)
5088                 return -EOPNOTSUPP;
5089
5090         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5091             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5092                 return -EOPNOTSUPP;
5093
5094         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5095         chan = ieee80211_get_channel(&rdev->wiphy,
5096                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5097         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5098                 return -EINVAL;
5099
5100         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5101         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5102
5103         if (info->attrs[NL80211_ATTR_IE]) {
5104                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5105                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5106         }
5107
5108         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5109         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5110                 return -EINVAL;
5111
5112         if (auth_type == NL80211_AUTHTYPE_SAE &&
5113             !info->attrs[NL80211_ATTR_SAE_DATA])
5114                 return -EINVAL;
5115
5116         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5117                 if (auth_type != NL80211_AUTHTYPE_SAE)
5118                         return -EINVAL;
5119                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5120                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5121                 /* need to include at least Auth Transaction and Status Code */
5122                 if (sae_data_len < 4)
5123                         return -EINVAL;
5124         }
5125
5126         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5127
5128         /*
5129          * Since we no longer track auth state, ignore
5130          * requests to only change local state.
5131          */
5132         if (local_state_change)
5133                 return 0;
5134
5135         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5136                                   ssid, ssid_len, ie, ie_len,
5137                                   key.p.key, key.p.key_len, key.idx,
5138                                   sae_data, sae_data_len);
5139 }
5140
5141 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5142                                    struct genl_info *info,
5143                                    struct cfg80211_crypto_settings *settings,
5144                                    int cipher_limit)
5145 {
5146         memset(settings, 0, sizeof(*settings));
5147
5148         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5149
5150         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5151                 u16 proto;
5152                 proto = nla_get_u16(
5153                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5154                 settings->control_port_ethertype = cpu_to_be16(proto);
5155                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5156                     proto != ETH_P_PAE)
5157                         return -EINVAL;
5158                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5159                         settings->control_port_no_encrypt = true;
5160         } else
5161                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5162
5163         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5164                 void *data;
5165                 int len, i;
5166
5167                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5168                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5169                 settings->n_ciphers_pairwise = len / sizeof(u32);
5170
5171                 if (len % sizeof(u32))
5172                         return -EINVAL;
5173
5174                 if (settings->n_ciphers_pairwise > cipher_limit)
5175                         return -EINVAL;
5176
5177                 memcpy(settings->ciphers_pairwise, data, len);
5178
5179                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5180                         if (!cfg80211_supported_cipher_suite(
5181                                         &rdev->wiphy,
5182                                         settings->ciphers_pairwise[i]))
5183                                 return -EINVAL;
5184         }
5185
5186         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5187                 settings->cipher_group =
5188                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5189                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5190                                                      settings->cipher_group))
5191                         return -EINVAL;
5192         }
5193
5194         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5195                 settings->wpa_versions =
5196                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5197                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5198                         return -EINVAL;
5199         }
5200
5201         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5202                 void *data;
5203                 int len;
5204
5205                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5206                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5207                 settings->n_akm_suites = len / sizeof(u32);
5208
5209                 if (len % sizeof(u32))
5210                         return -EINVAL;
5211
5212                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5213                         return -EINVAL;
5214
5215                 memcpy(settings->akm_suites, data, len);
5216         }
5217
5218         return 0;
5219 }
5220
5221 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5222 {
5223         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5224         struct net_device *dev = info->user_ptr[1];
5225         struct cfg80211_crypto_settings crypto;
5226         struct ieee80211_channel *chan;
5227         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5228         int err, ssid_len, ie_len = 0;
5229         bool use_mfp = false;
5230         u32 flags = 0;
5231         struct ieee80211_ht_cap *ht_capa = NULL;
5232         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5233
5234         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5235                 return -EINVAL;
5236
5237         if (!info->attrs[NL80211_ATTR_MAC] ||
5238             !info->attrs[NL80211_ATTR_SSID] ||
5239             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5240                 return -EINVAL;
5241
5242         if (!rdev->ops->assoc)
5243                 return -EOPNOTSUPP;
5244
5245         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5246             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5247                 return -EOPNOTSUPP;
5248
5249         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5250
5251         chan = ieee80211_get_channel(&rdev->wiphy,
5252                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5253         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5254                 return -EINVAL;
5255
5256         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5257         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5258
5259         if (info->attrs[NL80211_ATTR_IE]) {
5260                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5261                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5262         }
5263
5264         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5265                 enum nl80211_mfp mfp =
5266                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5267                 if (mfp == NL80211_MFP_REQUIRED)
5268                         use_mfp = true;
5269                 else if (mfp != NL80211_MFP_NO)
5270                         return -EINVAL;
5271         }
5272
5273         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5274                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5275
5276         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5277                 flags |= ASSOC_REQ_DISABLE_HT;
5278
5279         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5280                 ht_capa_mask =
5281                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5282
5283         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5284                 if (!ht_capa_mask)
5285                         return -EINVAL;
5286                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5287         }
5288
5289         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5290         if (!err)
5291                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5292                                           ssid, ssid_len, ie, ie_len, use_mfp,
5293                                           &crypto, flags, ht_capa,
5294                                           ht_capa_mask);
5295
5296         return err;
5297 }
5298
5299 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5300 {
5301         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5302         struct net_device *dev = info->user_ptr[1];
5303         const u8 *ie = NULL, *bssid;
5304         int ie_len = 0;
5305         u16 reason_code;
5306         bool local_state_change;
5307
5308         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5309                 return -EINVAL;
5310
5311         if (!info->attrs[NL80211_ATTR_MAC])
5312                 return -EINVAL;
5313
5314         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5315                 return -EINVAL;
5316
5317         if (!rdev->ops->deauth)
5318                 return -EOPNOTSUPP;
5319
5320         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5321             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5322                 return -EOPNOTSUPP;
5323
5324         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5325
5326         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5327         if (reason_code == 0) {
5328                 /* Reason Code 0 is reserved */
5329                 return -EINVAL;
5330         }
5331
5332         if (info->attrs[NL80211_ATTR_IE]) {
5333                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5334                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5335         }
5336
5337         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5338
5339         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5340                                     local_state_change);
5341 }
5342
5343 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5344 {
5345         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5346         struct net_device *dev = info->user_ptr[1];
5347         const u8 *ie = NULL, *bssid;
5348         int ie_len = 0;
5349         u16 reason_code;
5350         bool local_state_change;
5351
5352         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5353                 return -EINVAL;
5354
5355         if (!info->attrs[NL80211_ATTR_MAC])
5356                 return -EINVAL;
5357
5358         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5359                 return -EINVAL;
5360
5361         if (!rdev->ops->disassoc)
5362                 return -EOPNOTSUPP;
5363
5364         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5365             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5366                 return -EOPNOTSUPP;
5367
5368         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5369
5370         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5371         if (reason_code == 0) {
5372                 /* Reason Code 0 is reserved */
5373                 return -EINVAL;
5374         }
5375
5376         if (info->attrs[NL80211_ATTR_IE]) {
5377                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5378                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5379         }
5380
5381         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5382
5383         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5384                                       local_state_change);
5385 }
5386
5387 static bool
5388 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5389                          int mcast_rate[IEEE80211_NUM_BANDS],
5390                          int rateval)
5391 {
5392         struct wiphy *wiphy = &rdev->wiphy;
5393         bool found = false;
5394         int band, i;
5395
5396         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5397                 struct ieee80211_supported_band *sband;
5398
5399                 sband = wiphy->bands[band];
5400                 if (!sband)
5401                         continue;
5402
5403                 for (i = 0; i < sband->n_bitrates; i++) {
5404                         if (sband->bitrates[i].bitrate == rateval) {
5405                                 mcast_rate[band] = i + 1;
5406                                 found = true;
5407                                 break;
5408                         }
5409                 }
5410         }
5411
5412         return found;
5413 }
5414
5415 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5416 {
5417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5418         struct net_device *dev = info->user_ptr[1];
5419         struct cfg80211_ibss_params ibss;
5420         struct wiphy *wiphy;
5421         struct cfg80211_cached_keys *connkeys = NULL;
5422         int err;
5423
5424         memset(&ibss, 0, sizeof(ibss));
5425
5426         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5427                 return -EINVAL;
5428
5429         if (!info->attrs[NL80211_ATTR_SSID] ||
5430             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5431                 return -EINVAL;
5432
5433         ibss.beacon_interval = 100;
5434
5435         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5436                 ibss.beacon_interval =
5437                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5438                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5439                         return -EINVAL;
5440         }
5441
5442         if (!rdev->ops->join_ibss)
5443                 return -EOPNOTSUPP;
5444
5445         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5446                 return -EOPNOTSUPP;
5447
5448         wiphy = &rdev->wiphy;
5449
5450         if (info->attrs[NL80211_ATTR_MAC]) {
5451                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5452
5453                 if (!is_valid_ether_addr(ibss.bssid))
5454                         return -EINVAL;
5455         }
5456         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5457         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5458
5459         if (info->attrs[NL80211_ATTR_IE]) {
5460                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5461                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5462         }
5463
5464         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5465         if (err)
5466                 return err;
5467
5468         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5469                 return -EINVAL;
5470
5471         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5472                 return -EINVAL;
5473         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5474             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5475
5476         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5477         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5478
5479         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5480                 u8 *rates =
5481                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5482                 int n_rates =
5483                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5484                 struct ieee80211_supported_band *sband =
5485                         wiphy->bands[ibss.chandef.chan->band];
5486
5487                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5488                                              &ibss.basic_rates);
5489                 if (err)
5490                         return err;
5491         }
5492
5493         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5494             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5495                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5496                 return -EINVAL;
5497
5498         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5499                 bool no_ht = false;
5500
5501                 connkeys = nl80211_parse_connkeys(rdev,
5502                                           info->attrs[NL80211_ATTR_KEYS],
5503                                           &no_ht);
5504                 if (IS_ERR(connkeys))
5505                         return PTR_ERR(connkeys);
5506
5507                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5508                     no_ht) {
5509                         kfree(connkeys);
5510                         return -EINVAL;
5511                 }
5512         }
5513
5514         ibss.control_port =
5515                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5516
5517         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5518         if (err)
5519                 kfree(connkeys);
5520         return err;
5521 }
5522
5523 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5524 {
5525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5526         struct net_device *dev = info->user_ptr[1];
5527
5528         if (!rdev->ops->leave_ibss)
5529                 return -EOPNOTSUPP;
5530
5531         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5532                 return -EOPNOTSUPP;
5533
5534         return cfg80211_leave_ibss(rdev, dev, false);
5535 }
5536
5537 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5538 {
5539         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5540         struct net_device *dev = info->user_ptr[1];
5541         int mcast_rate[IEEE80211_NUM_BANDS];
5542         u32 nla_rate;
5543         int err;
5544
5545         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5546             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5547                 return -EOPNOTSUPP;
5548
5549         if (!rdev->ops->set_mcast_rate)
5550                 return -EOPNOTSUPP;
5551
5552         memset(mcast_rate, 0, sizeof(mcast_rate));
5553
5554         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5555                 return -EINVAL;
5556
5557         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5558         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5559                 return -EINVAL;
5560
5561         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5562
5563         return err;
5564 }
5565
5566
5567 #ifdef CONFIG_NL80211_TESTMODE
5568 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5569         .name = "testmode",
5570 };
5571
5572 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5573 {
5574         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5575         int err;
5576
5577         if (!info->attrs[NL80211_ATTR_TESTDATA])
5578                 return -EINVAL;
5579
5580         err = -EOPNOTSUPP;
5581         if (rdev->ops->testmode_cmd) {
5582                 rdev->testmode_info = info;
5583                 err = rdev_testmode_cmd(rdev,
5584                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5585                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5586                 rdev->testmode_info = NULL;
5587         }
5588
5589         return err;
5590 }
5591
5592 static int nl80211_testmode_dump(struct sk_buff *skb,
5593                                  struct netlink_callback *cb)
5594 {
5595         struct cfg80211_registered_device *rdev;
5596         int err;
5597         long phy_idx;
5598         void *data = NULL;
5599         int data_len = 0;
5600
5601         if (cb->args[0]) {
5602                 /*
5603                  * 0 is a valid index, but not valid for args[0],
5604                  * so we need to offset by 1.
5605                  */
5606                 phy_idx = cb->args[0] - 1;
5607         } else {
5608                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5609                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5610                                   nl80211_policy);
5611                 if (err)
5612                         return err;
5613
5614                 mutex_lock(&cfg80211_mutex);
5615                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5616                                                   nl80211_fam.attrbuf);
5617                 if (IS_ERR(rdev)) {
5618                         mutex_unlock(&cfg80211_mutex);
5619                         return PTR_ERR(rdev);
5620                 }
5621                 phy_idx = rdev->wiphy_idx;
5622                 rdev = NULL;
5623                 mutex_unlock(&cfg80211_mutex);
5624
5625                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5626                         cb->args[1] =
5627                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5628         }
5629
5630         if (cb->args[1]) {
5631                 data = nla_data((void *)cb->args[1]);
5632                 data_len = nla_len((void *)cb->args[1]);
5633         }
5634
5635         mutex_lock(&cfg80211_mutex);
5636         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5637         if (!rdev) {
5638                 mutex_unlock(&cfg80211_mutex);
5639                 return -ENOENT;
5640         }
5641         cfg80211_lock_rdev(rdev);
5642         mutex_unlock(&cfg80211_mutex);
5643
5644         if (!rdev->ops->testmode_dump) {
5645                 err = -EOPNOTSUPP;
5646                 goto out_err;
5647         }
5648
5649         while (1) {
5650                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
5651                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5652                                            NL80211_CMD_TESTMODE);
5653                 struct nlattr *tmdata;
5654
5655                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5656                         genlmsg_cancel(skb, hdr);
5657                         break;
5658                 }
5659
5660                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5661                 if (!tmdata) {
5662                         genlmsg_cancel(skb, hdr);
5663                         break;
5664                 }
5665                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
5666                 nla_nest_end(skb, tmdata);
5667
5668                 if (err == -ENOBUFS || err == -ENOENT) {
5669                         genlmsg_cancel(skb, hdr);
5670                         break;
5671                 } else if (err) {
5672                         genlmsg_cancel(skb, hdr);
5673                         goto out_err;
5674                 }
5675
5676                 genlmsg_end(skb, hdr);
5677         }
5678
5679         err = skb->len;
5680         /* see above */
5681         cb->args[0] = phy_idx + 1;
5682  out_err:
5683         cfg80211_unlock_rdev(rdev);
5684         return err;
5685 }
5686
5687 static struct sk_buff *
5688 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5689                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
5690 {
5691         struct sk_buff *skb;
5692         void *hdr;
5693         struct nlattr *data;
5694
5695         skb = nlmsg_new(approxlen + 100, gfp);
5696         if (!skb)
5697                 return NULL;
5698
5699         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
5700         if (!hdr) {
5701                 kfree_skb(skb);
5702                 return NULL;
5703         }
5704
5705         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5706                 goto nla_put_failure;
5707         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5708
5709         ((void **)skb->cb)[0] = rdev;
5710         ((void **)skb->cb)[1] = hdr;
5711         ((void **)skb->cb)[2] = data;
5712
5713         return skb;
5714
5715  nla_put_failure:
5716         kfree_skb(skb);
5717         return NULL;
5718 }
5719
5720 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5721                                                   int approxlen)
5722 {
5723         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5724
5725         if (WARN_ON(!rdev->testmode_info))
5726                 return NULL;
5727
5728         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5729                                 rdev->testmode_info->snd_portid,
5730                                 rdev->testmode_info->snd_seq,
5731                                 GFP_KERNEL);
5732 }
5733 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5734
5735 int cfg80211_testmode_reply(struct sk_buff *skb)
5736 {
5737         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5738         void *hdr = ((void **)skb->cb)[1];
5739         struct nlattr *data = ((void **)skb->cb)[2];
5740
5741         if (WARN_ON(!rdev->testmode_info)) {
5742                 kfree_skb(skb);
5743                 return -EINVAL;
5744         }
5745
5746         nla_nest_end(skb, data);
5747         genlmsg_end(skb, hdr);
5748         return genlmsg_reply(skb, rdev->testmode_info);
5749 }
5750 EXPORT_SYMBOL(cfg80211_testmode_reply);
5751
5752 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5753                                                   int approxlen, gfp_t gfp)
5754 {
5755         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5756
5757         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5758 }
5759 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5760
5761 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5762 {
5763         void *hdr = ((void **)skb->cb)[1];
5764         struct nlattr *data = ((void **)skb->cb)[2];
5765
5766         nla_nest_end(skb, data);
5767         genlmsg_end(skb, hdr);
5768         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5769 }
5770 EXPORT_SYMBOL(cfg80211_testmode_event);
5771 #endif
5772
5773 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5774 {
5775         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5776         struct net_device *dev = info->user_ptr[1];
5777         struct cfg80211_connect_params connect;
5778         struct wiphy *wiphy;
5779         struct cfg80211_cached_keys *connkeys = NULL;
5780         int err;
5781
5782         memset(&connect, 0, sizeof(connect));
5783
5784         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5785                 return -EINVAL;
5786
5787         if (!info->attrs[NL80211_ATTR_SSID] ||
5788             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5789                 return -EINVAL;
5790
5791         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5792                 connect.auth_type =
5793                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5794                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
5795                                              NL80211_CMD_CONNECT))
5796                         return -EINVAL;
5797         } else
5798                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5799
5800         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5801
5802         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5803                                       NL80211_MAX_NR_CIPHER_SUITES);
5804         if (err)
5805                 return err;
5806
5807         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5808             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5809                 return -EOPNOTSUPP;
5810
5811         wiphy = &rdev->wiphy;
5812
5813         connect.bg_scan_period = -1;
5814         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5815                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5816                 connect.bg_scan_period =
5817                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5818         }
5819
5820         if (info->attrs[NL80211_ATTR_MAC])
5821                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5822         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5823         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5824
5825         if (info->attrs[NL80211_ATTR_IE]) {
5826                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5827                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5828         }
5829
5830         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5831                 connect.channel =
5832                         ieee80211_get_channel(wiphy,
5833                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5834                 if (!connect.channel ||
5835                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5836                         return -EINVAL;
5837         }
5838
5839         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5840                 connkeys = nl80211_parse_connkeys(rdev,
5841                                           info->attrs[NL80211_ATTR_KEYS], NULL);
5842                 if (IS_ERR(connkeys))
5843                         return PTR_ERR(connkeys);
5844         }
5845
5846         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5847                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5848
5849         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5850                 memcpy(&connect.ht_capa_mask,
5851                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5852                        sizeof(connect.ht_capa_mask));
5853
5854         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5855                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
5856                         kfree(connkeys);
5857                         return -EINVAL;
5858                 }
5859                 memcpy(&connect.ht_capa,
5860                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5861                        sizeof(connect.ht_capa));
5862         }
5863
5864         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5865         if (err)
5866                 kfree(connkeys);
5867         return err;
5868 }
5869
5870 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5871 {
5872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5873         struct net_device *dev = info->user_ptr[1];
5874         u16 reason;
5875
5876         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5877                 reason = WLAN_REASON_DEAUTH_LEAVING;
5878         else
5879                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5880
5881         if (reason == 0)
5882                 return -EINVAL;
5883
5884         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5885             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5886                 return -EOPNOTSUPP;
5887
5888         return cfg80211_disconnect(rdev, dev, reason, true);
5889 }
5890
5891 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5892 {
5893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5894         struct net *net;
5895         int err;
5896         u32 pid;
5897
5898         if (!info->attrs[NL80211_ATTR_PID])
5899                 return -EINVAL;
5900
5901         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5902
5903         net = get_net_ns_by_pid(pid);
5904         if (IS_ERR(net))
5905                 return PTR_ERR(net);
5906
5907         err = 0;
5908
5909         /* check if anything to do */
5910         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5911                 err = cfg80211_switch_netns(rdev, net);
5912
5913         put_net(net);
5914         return err;
5915 }
5916
5917 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5918 {
5919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5920         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5921                         struct cfg80211_pmksa *pmksa) = NULL;
5922         struct net_device *dev = info->user_ptr[1];
5923         struct cfg80211_pmksa pmksa;
5924
5925         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5926
5927         if (!info->attrs[NL80211_ATTR_MAC])
5928                 return -EINVAL;
5929
5930         if (!info->attrs[NL80211_ATTR_PMKID])
5931                 return -EINVAL;
5932
5933         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5934         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5935
5936         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5937             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5938                 return -EOPNOTSUPP;
5939
5940         switch (info->genlhdr->cmd) {
5941         case NL80211_CMD_SET_PMKSA:
5942                 rdev_ops = rdev->ops->set_pmksa;
5943                 break;
5944         case NL80211_CMD_DEL_PMKSA:
5945                 rdev_ops = rdev->ops->del_pmksa;
5946                 break;
5947         default:
5948                 WARN_ON(1);
5949                 break;
5950         }
5951
5952         if (!rdev_ops)
5953                 return -EOPNOTSUPP;
5954
5955         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5956 }
5957
5958 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5959 {
5960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5961         struct net_device *dev = info->user_ptr[1];
5962
5963         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5964             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5965                 return -EOPNOTSUPP;
5966
5967         if (!rdev->ops->flush_pmksa)
5968                 return -EOPNOTSUPP;
5969
5970         return rdev_flush_pmksa(rdev, dev);
5971 }
5972
5973 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5974 {
5975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5976         struct net_device *dev = info->user_ptr[1];
5977         u8 action_code, dialog_token;
5978         u16 status_code;
5979         u8 *peer;
5980
5981         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5982             !rdev->ops->tdls_mgmt)
5983                 return -EOPNOTSUPP;
5984
5985         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5986             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5987             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5988             !info->attrs[NL80211_ATTR_IE] ||
5989             !info->attrs[NL80211_ATTR_MAC])
5990                 return -EINVAL;
5991
5992         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5993         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5994         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5995         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5996
5997         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
5998                               dialog_token, status_code,
5999                               nla_data(info->attrs[NL80211_ATTR_IE]),
6000                               nla_len(info->attrs[NL80211_ATTR_IE]));
6001 }
6002
6003 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6004 {
6005         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6006         struct net_device *dev = info->user_ptr[1];
6007         enum nl80211_tdls_operation operation;
6008         u8 *peer;
6009
6010         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6011             !rdev->ops->tdls_oper)
6012                 return -EOPNOTSUPP;
6013
6014         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6015             !info->attrs[NL80211_ATTR_MAC])
6016                 return -EINVAL;
6017
6018         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6019         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6020
6021         return rdev_tdls_oper(rdev, dev, peer, operation);
6022 }
6023
6024 static int nl80211_remain_on_channel(struct sk_buff *skb,
6025                                      struct genl_info *info)
6026 {
6027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6028         struct wireless_dev *wdev = info->user_ptr[1];
6029         struct cfg80211_chan_def chandef;
6030         struct sk_buff *msg;
6031         void *hdr;
6032         u64 cookie;
6033         u32 duration;
6034         int err;
6035
6036         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6037             !info->attrs[NL80211_ATTR_DURATION])
6038                 return -EINVAL;
6039
6040         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6041
6042         if (!rdev->ops->remain_on_channel ||
6043             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6044                 return -EOPNOTSUPP;
6045
6046         /*
6047          * We should be on that channel for at least a minimum amount of
6048          * time (10ms) but no longer than the driver supports.
6049          */
6050         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6051             duration > rdev->wiphy.max_remain_on_channel_duration)
6052                 return -EINVAL;
6053
6054         err = nl80211_parse_chandef(rdev, info, &chandef);
6055         if (err)
6056                 return err;
6057
6058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6059         if (!msg)
6060                 return -ENOMEM;
6061
6062         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6063                              NL80211_CMD_REMAIN_ON_CHANNEL);
6064
6065         if (IS_ERR(hdr)) {
6066                 err = PTR_ERR(hdr);
6067                 goto free_msg;
6068         }
6069
6070         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6071                                      duration, &cookie);
6072
6073         if (err)
6074                 goto free_msg;
6075
6076         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6077                 goto nla_put_failure;
6078
6079         genlmsg_end(msg, hdr);
6080
6081         return genlmsg_reply(msg, info);
6082
6083  nla_put_failure:
6084         err = -ENOBUFS;
6085  free_msg:
6086         nlmsg_free(msg);
6087         return err;
6088 }
6089
6090 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6091                                             struct genl_info *info)
6092 {
6093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6094         struct wireless_dev *wdev = info->user_ptr[1];
6095         u64 cookie;
6096
6097         if (!info->attrs[NL80211_ATTR_COOKIE])
6098                 return -EINVAL;
6099
6100         if (!rdev->ops->cancel_remain_on_channel)
6101                 return -EOPNOTSUPP;
6102
6103         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6104
6105         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6106 }
6107
6108 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6109                            u8 *rates, u8 rates_len)
6110 {
6111         u8 i;
6112         u32 mask = 0;
6113
6114         for (i = 0; i < rates_len; i++) {
6115                 int rate = (rates[i] & 0x7f) * 5;
6116                 int ridx;
6117                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6118                         struct ieee80211_rate *srate =
6119                                 &sband->bitrates[ridx];
6120                         if (rate == srate->bitrate) {
6121                                 mask |= 1 << ridx;
6122                                 break;
6123                         }
6124                 }
6125                 if (ridx == sband->n_bitrates)
6126                         return 0; /* rate not found */
6127         }
6128
6129         return mask;
6130 }
6131
6132 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6133                                u8 *rates, u8 rates_len,
6134                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6135 {
6136         u8 i;
6137
6138         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6139
6140         for (i = 0; i < rates_len; i++) {
6141                 int ridx, rbit;
6142
6143                 ridx = rates[i] / 8;
6144                 rbit = BIT(rates[i] % 8);
6145
6146                 /* check validity */
6147                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6148                         return false;
6149
6150                 /* check availability */
6151                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6152                         mcs[ridx] |= rbit;
6153                 else
6154                         return false;
6155         }
6156
6157         return true;
6158 }
6159
6160 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6161         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6162                                     .len = NL80211_MAX_SUPP_RATES },
6163         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6164                                  .len = NL80211_MAX_SUPP_HT_RATES },
6165 };
6166
6167 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6168                                        struct genl_info *info)
6169 {
6170         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6171         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6172         struct cfg80211_bitrate_mask mask;
6173         int rem, i;
6174         struct net_device *dev = info->user_ptr[1];
6175         struct nlattr *tx_rates;
6176         struct ieee80211_supported_band *sband;
6177
6178         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6179                 return -EINVAL;
6180
6181         if (!rdev->ops->set_bitrate_mask)
6182                 return -EOPNOTSUPP;
6183
6184         memset(&mask, 0, sizeof(mask));
6185         /* Default to all rates enabled */
6186         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6187                 sband = rdev->wiphy.bands[i];
6188                 mask.control[i].legacy =
6189                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6190                 if (sband)
6191                         memcpy(mask.control[i].mcs,
6192                                sband->ht_cap.mcs.rx_mask,
6193                                sizeof(mask.control[i].mcs));
6194                 else
6195                         memset(mask.control[i].mcs, 0,
6196                                sizeof(mask.control[i].mcs));
6197         }
6198
6199         /*
6200          * The nested attribute uses enum nl80211_band as the index. This maps
6201          * directly to the enum ieee80211_band values used in cfg80211.
6202          */
6203         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6204         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6205         {
6206                 enum ieee80211_band band = nla_type(tx_rates);
6207                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6208                         return -EINVAL;
6209                 sband = rdev->wiphy.bands[band];
6210                 if (sband == NULL)
6211                         return -EINVAL;
6212                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6213                           nla_len(tx_rates), nl80211_txattr_policy);
6214                 if (tb[NL80211_TXRATE_LEGACY]) {
6215                         mask.control[band].legacy = rateset_to_mask(
6216                                 sband,
6217                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6218                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6219                         if ((mask.control[band].legacy == 0) &&
6220                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6221                                 return -EINVAL;
6222                 }
6223                 if (tb[NL80211_TXRATE_MCS]) {
6224                         if (!ht_rateset_to_mask(
6225                                         sband,
6226                                         nla_data(tb[NL80211_TXRATE_MCS]),
6227                                         nla_len(tb[NL80211_TXRATE_MCS]),
6228                                         mask.control[band].mcs))
6229                                 return -EINVAL;
6230                 }
6231
6232                 if (mask.control[band].legacy == 0) {
6233                         /* don't allow empty legacy rates if HT
6234                          * is not even supported. */
6235                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6236                                 return -EINVAL;
6237
6238                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6239                                 if (mask.control[band].mcs[i])
6240                                         break;
6241
6242                         /* legacy and mcs rates may not be both empty */
6243                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6244                                 return -EINVAL;
6245                 }
6246         }
6247
6248         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6249 }
6250
6251 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6252 {
6253         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6254         struct wireless_dev *wdev = info->user_ptr[1];
6255         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6256
6257         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6258                 return -EINVAL;
6259
6260         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6261                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6262
6263         switch (wdev->iftype) {
6264         case NL80211_IFTYPE_STATION:
6265         case NL80211_IFTYPE_ADHOC:
6266         case NL80211_IFTYPE_P2P_CLIENT:
6267         case NL80211_IFTYPE_AP:
6268         case NL80211_IFTYPE_AP_VLAN:
6269         case NL80211_IFTYPE_MESH_POINT:
6270         case NL80211_IFTYPE_P2P_GO:
6271         case NL80211_IFTYPE_P2P_DEVICE:
6272                 break;
6273         default:
6274                 return -EOPNOTSUPP;
6275         }
6276
6277         /* not much point in registering if we can't reply */
6278         if (!rdev->ops->mgmt_tx)
6279                 return -EOPNOTSUPP;
6280
6281         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6282                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6283                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6284 }
6285
6286 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6287 {
6288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6289         struct wireless_dev *wdev = info->user_ptr[1];
6290         struct cfg80211_chan_def chandef;
6291         int err;
6292         void *hdr = NULL;
6293         u64 cookie;
6294         struct sk_buff *msg = NULL;
6295         unsigned int wait = 0;
6296         bool offchan, no_cck, dont_wait_for_ack;
6297
6298         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6299
6300         if (!info->attrs[NL80211_ATTR_FRAME])
6301                 return -EINVAL;
6302
6303         if (!rdev->ops->mgmt_tx)
6304                 return -EOPNOTSUPP;
6305
6306         switch (wdev->iftype) {
6307         case NL80211_IFTYPE_STATION:
6308         case NL80211_IFTYPE_ADHOC:
6309         case NL80211_IFTYPE_P2P_CLIENT:
6310         case NL80211_IFTYPE_AP:
6311         case NL80211_IFTYPE_AP_VLAN:
6312         case NL80211_IFTYPE_MESH_POINT:
6313         case NL80211_IFTYPE_P2P_GO:
6314         case NL80211_IFTYPE_P2P_DEVICE:
6315                 break;
6316         default:
6317                 return -EOPNOTSUPP;
6318         }
6319
6320         if (info->attrs[NL80211_ATTR_DURATION]) {
6321                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6322                         return -EINVAL;
6323                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6324
6325                 /*
6326                  * We should wait on the channel for at least a minimum amount
6327                  * of time (10ms) but no longer than the driver supports.
6328                  */
6329                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6330                     wait > rdev->wiphy.max_remain_on_channel_duration)
6331                         return -EINVAL;
6332
6333         }
6334
6335         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6336
6337         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6338                 return -EINVAL;
6339
6340         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6341
6342         err = nl80211_parse_chandef(rdev, info, &chandef);
6343         if (err)
6344                 return err;
6345
6346         if (!dont_wait_for_ack) {
6347                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6348                 if (!msg)
6349                         return -ENOMEM;
6350
6351                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6352                                      NL80211_CMD_FRAME);
6353
6354                 if (IS_ERR(hdr)) {
6355                         err = PTR_ERR(hdr);
6356                         goto free_msg;
6357                 }
6358         }
6359
6360         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6361                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6362                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6363                                     no_cck, dont_wait_for_ack, &cookie);
6364         if (err)
6365                 goto free_msg;
6366
6367         if (msg) {
6368                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6369                         goto nla_put_failure;
6370
6371                 genlmsg_end(msg, hdr);
6372                 return genlmsg_reply(msg, info);
6373         }
6374
6375         return 0;
6376
6377  nla_put_failure:
6378         err = -ENOBUFS;
6379  free_msg:
6380         nlmsg_free(msg);
6381         return err;
6382 }
6383
6384 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6385 {
6386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6387         struct wireless_dev *wdev = info->user_ptr[1];
6388         u64 cookie;
6389
6390         if (!info->attrs[NL80211_ATTR_COOKIE])
6391                 return -EINVAL;
6392
6393         if (!rdev->ops->mgmt_tx_cancel_wait)
6394                 return -EOPNOTSUPP;
6395
6396         switch (wdev->iftype) {
6397         case NL80211_IFTYPE_STATION:
6398         case NL80211_IFTYPE_ADHOC:
6399         case NL80211_IFTYPE_P2P_CLIENT:
6400         case NL80211_IFTYPE_AP:
6401         case NL80211_IFTYPE_AP_VLAN:
6402         case NL80211_IFTYPE_P2P_GO:
6403         case NL80211_IFTYPE_P2P_DEVICE:
6404                 break;
6405         default:
6406                 return -EOPNOTSUPP;
6407         }
6408
6409         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6410
6411         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6412 }
6413
6414 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6415 {
6416         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6417         struct wireless_dev *wdev;
6418         struct net_device *dev = info->user_ptr[1];
6419         u8 ps_state;
6420         bool state;
6421         int err;
6422
6423         if (!info->attrs[NL80211_ATTR_PS_STATE])
6424                 return -EINVAL;
6425
6426         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6427
6428         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6429                 return -EINVAL;
6430
6431         wdev = dev->ieee80211_ptr;
6432
6433         if (!rdev->ops->set_power_mgmt)
6434                 return -EOPNOTSUPP;
6435
6436         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6437
6438         if (state == wdev->ps)
6439                 return 0;
6440
6441         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6442         if (!err)
6443                 wdev->ps = state;
6444         return err;
6445 }
6446
6447 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6448 {
6449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6450         enum nl80211_ps_state ps_state;
6451         struct wireless_dev *wdev;
6452         struct net_device *dev = info->user_ptr[1];
6453         struct sk_buff *msg;
6454         void *hdr;
6455         int err;
6456
6457         wdev = dev->ieee80211_ptr;
6458
6459         if (!rdev->ops->set_power_mgmt)
6460                 return -EOPNOTSUPP;
6461
6462         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6463         if (!msg)
6464                 return -ENOMEM;
6465
6466         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6467                              NL80211_CMD_GET_POWER_SAVE);
6468         if (!hdr) {
6469                 err = -ENOBUFS;
6470                 goto free_msg;
6471         }
6472
6473         if (wdev->ps)
6474                 ps_state = NL80211_PS_ENABLED;
6475         else
6476                 ps_state = NL80211_PS_DISABLED;
6477
6478         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6479                 goto nla_put_failure;
6480
6481         genlmsg_end(msg, hdr);
6482         return genlmsg_reply(msg, info);
6483
6484  nla_put_failure:
6485         err = -ENOBUFS;
6486  free_msg:
6487         nlmsg_free(msg);
6488         return err;
6489 }
6490
6491 static struct nla_policy
6492 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6493         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6494         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6495         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6496         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6497         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6498         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6499 };
6500
6501 static int nl80211_set_cqm_txe(struct genl_info *info,
6502                                 u32 rate, u32 pkts, u32 intvl)
6503 {
6504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6505         struct wireless_dev *wdev;
6506         struct net_device *dev = info->user_ptr[1];
6507
6508         if ((rate < 0 || rate > 100) ||
6509             (intvl < 0 || intvl > NL80211_CQM_TXE_MAX_INTVL))
6510                 return -EINVAL;
6511
6512         wdev = dev->ieee80211_ptr;
6513
6514         if (!rdev->ops->set_cqm_txe_config)
6515                 return -EOPNOTSUPP;
6516
6517         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6518             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6519                 return -EOPNOTSUPP;
6520
6521         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6522 }
6523
6524 static int nl80211_set_cqm_rssi(struct genl_info *info,
6525                                 s32 threshold, u32 hysteresis)
6526 {
6527         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6528         struct wireless_dev *wdev;
6529         struct net_device *dev = info->user_ptr[1];
6530
6531         if (threshold > 0)
6532                 return -EINVAL;
6533
6534         wdev = dev->ieee80211_ptr;
6535
6536         if (!rdev->ops->set_cqm_rssi_config)
6537                 return -EOPNOTSUPP;
6538
6539         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6540             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6541                 return -EOPNOTSUPP;
6542
6543         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6544 }
6545
6546 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6547 {
6548         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6549         struct nlattr *cqm;
6550         int err;
6551
6552         cqm = info->attrs[NL80211_ATTR_CQM];
6553         if (!cqm) {
6554                 err = -EINVAL;
6555                 goto out;
6556         }
6557
6558         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6559                                nl80211_attr_cqm_policy);
6560         if (err)
6561                 goto out;
6562
6563         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6564             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6565                 s32 threshold;
6566                 u32 hysteresis;
6567                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6568                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6569                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6570         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6571                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6572                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6573                 u32 rate, pkts, intvl;
6574                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6575                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6576                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6577                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6578         } else
6579                 err = -EINVAL;
6580
6581 out:
6582         return err;
6583 }
6584
6585 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6586 {
6587         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6588         struct net_device *dev = info->user_ptr[1];
6589         struct mesh_config cfg;
6590         struct mesh_setup setup;
6591         int err;
6592
6593         /* start with default */
6594         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6595         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6596
6597         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6598                 /* and parse parameters if given */
6599                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6600                 if (err)
6601                         return err;
6602         }
6603
6604         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6605             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6606                 return -EINVAL;
6607
6608         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6609         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6610
6611         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6612             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6613                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6614                         return -EINVAL;
6615
6616         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6617                 /* parse additional setup parameters if given */
6618                 err = nl80211_parse_mesh_setup(info, &setup);
6619                 if (err)
6620                         return err;
6621         }
6622
6623         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6624                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6625                 if (err)
6626                         return err;
6627         } else {
6628                 /* cfg80211_join_mesh() will sort it out */
6629                 setup.chandef.chan = NULL;
6630         }
6631
6632         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6633 }
6634
6635 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6636 {
6637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6638         struct net_device *dev = info->user_ptr[1];
6639
6640         return cfg80211_leave_mesh(rdev, dev);
6641 }
6642
6643 #ifdef CONFIG_PM
6644 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6645 {
6646         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6647         struct sk_buff *msg;
6648         void *hdr;
6649
6650         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6651                 return -EOPNOTSUPP;
6652
6653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6654         if (!msg)
6655                 return -ENOMEM;
6656
6657         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6658                              NL80211_CMD_GET_WOWLAN);
6659         if (!hdr)
6660                 goto nla_put_failure;
6661
6662         if (rdev->wowlan) {
6663                 struct nlattr *nl_wowlan;
6664
6665                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6666                 if (!nl_wowlan)
6667                         goto nla_put_failure;
6668
6669                 if ((rdev->wowlan->any &&
6670                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6671                     (rdev->wowlan->disconnect &&
6672                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6673                     (rdev->wowlan->magic_pkt &&
6674                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6675                     (rdev->wowlan->gtk_rekey_failure &&
6676                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6677                     (rdev->wowlan->eap_identity_req &&
6678                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6679                     (rdev->wowlan->four_way_handshake &&
6680                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6681                     (rdev->wowlan->rfkill_release &&
6682                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6683                         goto nla_put_failure;
6684                 if (rdev->wowlan->n_patterns) {
6685                         struct nlattr *nl_pats, *nl_pat;
6686                         int i, pat_len;
6687
6688                         nl_pats = nla_nest_start(msg,
6689                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6690                         if (!nl_pats)
6691                                 goto nla_put_failure;
6692
6693                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6694                                 nl_pat = nla_nest_start(msg, i + 1);
6695                                 if (!nl_pat)
6696                                         goto nla_put_failure;
6697                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6698                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6699                                             DIV_ROUND_UP(pat_len, 8),
6700                                             rdev->wowlan->patterns[i].mask) ||
6701                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6702                                             pat_len,
6703                                             rdev->wowlan->patterns[i].pattern))
6704                                         goto nla_put_failure;
6705                                 nla_nest_end(msg, nl_pat);
6706                         }
6707                         nla_nest_end(msg, nl_pats);
6708                 }
6709
6710                 nla_nest_end(msg, nl_wowlan);
6711         }
6712
6713         genlmsg_end(msg, hdr);
6714         return genlmsg_reply(msg, info);
6715
6716 nla_put_failure:
6717         nlmsg_free(msg);
6718         return -ENOBUFS;
6719 }
6720
6721 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6722 {
6723         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6724         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6725         struct cfg80211_wowlan new_triggers = {};
6726         struct cfg80211_wowlan *ntrig;
6727         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6728         int err, i;
6729         bool prev_enabled = rdev->wowlan;
6730
6731         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6732                 return -EOPNOTSUPP;
6733
6734         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6735                 cfg80211_rdev_free_wowlan(rdev);
6736                 rdev->wowlan = NULL;
6737                 goto set_wakeup;
6738         }
6739
6740         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6741                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6742                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6743                         nl80211_wowlan_policy);
6744         if (err)
6745                 return err;
6746
6747         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6748                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6749                         return -EINVAL;
6750                 new_triggers.any = true;
6751         }
6752
6753         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6754                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6755                         return -EINVAL;
6756                 new_triggers.disconnect = true;
6757         }
6758
6759         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6760                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6761                         return -EINVAL;
6762                 new_triggers.magic_pkt = true;
6763         }
6764
6765         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6766                 return -EINVAL;
6767
6768         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6769                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6770                         return -EINVAL;
6771                 new_triggers.gtk_rekey_failure = true;
6772         }
6773
6774         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6775                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6776                         return -EINVAL;
6777                 new_triggers.eap_identity_req = true;
6778         }
6779
6780         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6781                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6782                         return -EINVAL;
6783                 new_triggers.four_way_handshake = true;
6784         }
6785
6786         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6787                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6788                         return -EINVAL;
6789                 new_triggers.rfkill_release = true;
6790         }
6791
6792         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6793                 struct nlattr *pat;
6794                 int n_patterns = 0;
6795                 int rem, pat_len, mask_len;
6796                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6797
6798                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6799                                     rem)
6800                         n_patterns++;
6801                 if (n_patterns > wowlan->n_patterns)
6802                         return -EINVAL;
6803
6804                 new_triggers.patterns = kcalloc(n_patterns,
6805                                                 sizeof(new_triggers.patterns[0]),
6806                                                 GFP_KERNEL);
6807                 if (!new_triggers.patterns)
6808                         return -ENOMEM;
6809
6810                 new_triggers.n_patterns = n_patterns;
6811                 i = 0;
6812
6813                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6814                                     rem) {
6815                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6816                                   nla_data(pat), nla_len(pat), NULL);
6817                         err = -EINVAL;
6818                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6819                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6820                                 goto error;
6821                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6822                         mask_len = DIV_ROUND_UP(pat_len, 8);
6823                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6824                             mask_len)
6825                                 goto error;
6826                         if (pat_len > wowlan->pattern_max_len ||
6827                             pat_len < wowlan->pattern_min_len)
6828                                 goto error;
6829
6830                         new_triggers.patterns[i].mask =
6831                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6832                         if (!new_triggers.patterns[i].mask) {
6833                                 err = -ENOMEM;
6834                                 goto error;
6835                         }
6836                         new_triggers.patterns[i].pattern =
6837                                 new_triggers.patterns[i].mask + mask_len;
6838                         memcpy(new_triggers.patterns[i].mask,
6839                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6840                                mask_len);
6841                         new_triggers.patterns[i].pattern_len = pat_len;
6842                         memcpy(new_triggers.patterns[i].pattern,
6843                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6844                                pat_len);
6845                         i++;
6846                 }
6847         }
6848
6849         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6850         if (!ntrig) {
6851                 err = -ENOMEM;
6852                 goto error;
6853         }
6854         cfg80211_rdev_free_wowlan(rdev);
6855         rdev->wowlan = ntrig;
6856
6857  set_wakeup:
6858         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6859                 rdev_set_wakeup(rdev, rdev->wowlan);
6860
6861         return 0;
6862  error:
6863         for (i = 0; i < new_triggers.n_patterns; i++)
6864                 kfree(new_triggers.patterns[i].mask);
6865         kfree(new_triggers.patterns);
6866         return err;
6867 }
6868 #endif
6869
6870 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6871 {
6872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6873         struct net_device *dev = info->user_ptr[1];
6874         struct wireless_dev *wdev = dev->ieee80211_ptr;
6875         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6876         struct cfg80211_gtk_rekey_data rekey_data;
6877         int err;
6878
6879         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6880                 return -EINVAL;
6881
6882         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6883                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6884                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6885                         nl80211_rekey_policy);
6886         if (err)
6887                 return err;
6888
6889         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6890                 return -ERANGE;
6891         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6892                 return -ERANGE;
6893         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6894                 return -ERANGE;
6895
6896         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6897                NL80211_KEK_LEN);
6898         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6899                NL80211_KCK_LEN);
6900         memcpy(rekey_data.replay_ctr,
6901                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6902                NL80211_REPLAY_CTR_LEN);
6903
6904         wdev_lock(wdev);
6905         if (!wdev->current_bss) {
6906                 err = -ENOTCONN;
6907                 goto out;
6908         }
6909
6910         if (!rdev->ops->set_rekey_data) {
6911                 err = -EOPNOTSUPP;
6912                 goto out;
6913         }
6914
6915         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6916  out:
6917         wdev_unlock(wdev);
6918         return err;
6919 }
6920
6921 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6922                                              struct genl_info *info)
6923 {
6924         struct net_device *dev = info->user_ptr[1];
6925         struct wireless_dev *wdev = dev->ieee80211_ptr;
6926
6927         if (wdev->iftype != NL80211_IFTYPE_AP &&
6928             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6929                 return -EINVAL;
6930
6931         if (wdev->ap_unexpected_nlportid)
6932                 return -EBUSY;
6933
6934         wdev->ap_unexpected_nlportid = info->snd_portid;
6935         return 0;
6936 }
6937
6938 static int nl80211_probe_client(struct sk_buff *skb,
6939                                 struct genl_info *info)
6940 {
6941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6942         struct net_device *dev = info->user_ptr[1];
6943         struct wireless_dev *wdev = dev->ieee80211_ptr;
6944         struct sk_buff *msg;
6945         void *hdr;
6946         const u8 *addr;
6947         u64 cookie;
6948         int err;
6949
6950         if (wdev->iftype != NL80211_IFTYPE_AP &&
6951             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6952                 return -EOPNOTSUPP;
6953
6954         if (!info->attrs[NL80211_ATTR_MAC])
6955                 return -EINVAL;
6956
6957         if (!rdev->ops->probe_client)
6958                 return -EOPNOTSUPP;
6959
6960         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6961         if (!msg)
6962                 return -ENOMEM;
6963
6964         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6965                              NL80211_CMD_PROBE_CLIENT);
6966
6967         if (IS_ERR(hdr)) {
6968                 err = PTR_ERR(hdr);
6969                 goto free_msg;
6970         }
6971
6972         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6973
6974         err = rdev_probe_client(rdev, dev, addr, &cookie);
6975         if (err)
6976                 goto free_msg;
6977
6978         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6979                 goto nla_put_failure;
6980
6981         genlmsg_end(msg, hdr);
6982
6983         return genlmsg_reply(msg, info);
6984
6985  nla_put_failure:
6986         err = -ENOBUFS;
6987  free_msg:
6988         nlmsg_free(msg);
6989         return err;
6990 }
6991
6992 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6993 {
6994         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6995         struct cfg80211_beacon_registration *reg, *nreg;
6996         int rv;
6997
6998         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6999                 return -EOPNOTSUPP;
7000
7001         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7002         if (!nreg)
7003                 return -ENOMEM;
7004
7005         /* First, check if already registered. */
7006         spin_lock_bh(&rdev->beacon_registrations_lock);
7007         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7008                 if (reg->nlportid == info->snd_portid) {
7009                         rv = -EALREADY;
7010                         goto out_err;
7011                 }
7012         }
7013         /* Add it to the list */
7014         nreg->nlportid = info->snd_portid;
7015         list_add(&nreg->list, &rdev->beacon_registrations);
7016
7017         spin_unlock_bh(&rdev->beacon_registrations_lock);
7018
7019         return 0;
7020 out_err:
7021         spin_unlock_bh(&rdev->beacon_registrations_lock);
7022         kfree(nreg);
7023         return rv;
7024 }
7025
7026 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7027 {
7028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7029         struct wireless_dev *wdev = info->user_ptr[1];
7030         int err;
7031
7032         if (!rdev->ops->start_p2p_device)
7033                 return -EOPNOTSUPP;
7034
7035         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7036                 return -EOPNOTSUPP;
7037
7038         if (wdev->p2p_started)
7039                 return 0;
7040
7041         mutex_lock(&rdev->devlist_mtx);
7042         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7043         mutex_unlock(&rdev->devlist_mtx);
7044         if (err)
7045                 return err;
7046
7047         err = rdev_start_p2p_device(rdev, wdev);
7048         if (err)
7049                 return err;
7050
7051         wdev->p2p_started = true;
7052         mutex_lock(&rdev->devlist_mtx);
7053         rdev->opencount++;
7054         mutex_unlock(&rdev->devlist_mtx);
7055
7056         return 0;
7057 }
7058
7059 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7060 {
7061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7062         struct wireless_dev *wdev = info->user_ptr[1];
7063
7064         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7065                 return -EOPNOTSUPP;
7066
7067         if (!rdev->ops->stop_p2p_device)
7068                 return -EOPNOTSUPP;
7069
7070         if (!wdev->p2p_started)
7071                 return 0;
7072
7073         rdev_stop_p2p_device(rdev, wdev);
7074         wdev->p2p_started = false;
7075
7076         mutex_lock(&rdev->devlist_mtx);
7077         rdev->opencount--;
7078         mutex_unlock(&rdev->devlist_mtx);
7079
7080         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7081                 rdev->scan_req->aborted = true;
7082                 ___cfg80211_scan_done(rdev, true);
7083         }
7084
7085         return 0;
7086 }
7087
7088 #define NL80211_FLAG_NEED_WIPHY         0x01
7089 #define NL80211_FLAG_NEED_NETDEV        0x02
7090 #define NL80211_FLAG_NEED_RTNL          0x04
7091 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7092 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7093                                          NL80211_FLAG_CHECK_NETDEV_UP)
7094 #define NL80211_FLAG_NEED_WDEV          0x10
7095 /* If a netdev is associated, it must be UP, P2P must be started */
7096 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7097                                          NL80211_FLAG_CHECK_NETDEV_UP)
7098
7099 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7100                             struct genl_info *info)
7101 {
7102         struct cfg80211_registered_device *rdev;
7103         struct wireless_dev *wdev;
7104         struct net_device *dev;
7105         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7106
7107         if (rtnl)
7108                 rtnl_lock();
7109
7110         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7111                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7112                 if (IS_ERR(rdev)) {
7113                         if (rtnl)
7114                                 rtnl_unlock();
7115                         return PTR_ERR(rdev);
7116                 }
7117                 info->user_ptr[0] = rdev;
7118         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7119                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7120                 mutex_lock(&cfg80211_mutex);
7121                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7122                                                   info->attrs);
7123                 if (IS_ERR(wdev)) {
7124                         mutex_unlock(&cfg80211_mutex);
7125                         if (rtnl)
7126                                 rtnl_unlock();
7127                         return PTR_ERR(wdev);
7128                 }
7129
7130                 dev = wdev->netdev;
7131                 rdev = wiphy_to_dev(wdev->wiphy);
7132
7133                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7134                         if (!dev) {
7135                                 mutex_unlock(&cfg80211_mutex);
7136                                 if (rtnl)
7137                                         rtnl_unlock();
7138                                 return -EINVAL;
7139                         }
7140
7141                         info->user_ptr[1] = dev;
7142                 } else {
7143                         info->user_ptr[1] = wdev;
7144                 }
7145
7146                 if (dev) {
7147                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7148                             !netif_running(dev)) {
7149                                 mutex_unlock(&cfg80211_mutex);
7150                                 if (rtnl)
7151                                         rtnl_unlock();
7152                                 return -ENETDOWN;
7153                         }
7154
7155                         dev_hold(dev);
7156                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7157                         if (!wdev->p2p_started) {
7158                                 mutex_unlock(&cfg80211_mutex);
7159                                 if (rtnl)
7160                                         rtnl_unlock();
7161                                 return -ENETDOWN;
7162                         }
7163                 }
7164
7165                 cfg80211_lock_rdev(rdev);
7166
7167                 mutex_unlock(&cfg80211_mutex);
7168
7169                 info->user_ptr[0] = rdev;
7170         }
7171
7172         return 0;
7173 }
7174
7175 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7176                               struct genl_info *info)
7177 {
7178         if (info->user_ptr[0])
7179                 cfg80211_unlock_rdev(info->user_ptr[0]);
7180         if (info->user_ptr[1]) {
7181                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7182                         struct wireless_dev *wdev = info->user_ptr[1];
7183
7184                         if (wdev->netdev)
7185                                 dev_put(wdev->netdev);
7186                 } else {
7187                         dev_put(info->user_ptr[1]);
7188                 }
7189         }
7190         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7191                 rtnl_unlock();
7192 }
7193
7194 static struct genl_ops nl80211_ops[] = {
7195         {
7196                 .cmd = NL80211_CMD_GET_WIPHY,
7197                 .doit = nl80211_get_wiphy,
7198                 .dumpit = nl80211_dump_wiphy,
7199                 .policy = nl80211_policy,
7200                 /* can be retrieved by unprivileged users */
7201                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7202         },
7203         {
7204                 .cmd = NL80211_CMD_SET_WIPHY,
7205                 .doit = nl80211_set_wiphy,
7206                 .policy = nl80211_policy,
7207                 .flags = GENL_ADMIN_PERM,
7208                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7209         },
7210         {
7211                 .cmd = NL80211_CMD_GET_INTERFACE,
7212                 .doit = nl80211_get_interface,
7213                 .dumpit = nl80211_dump_interface,
7214                 .policy = nl80211_policy,
7215                 /* can be retrieved by unprivileged users */
7216                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7217         },
7218         {
7219                 .cmd = NL80211_CMD_SET_INTERFACE,
7220                 .doit = nl80211_set_interface,
7221                 .policy = nl80211_policy,
7222                 .flags = GENL_ADMIN_PERM,
7223                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7224                                   NL80211_FLAG_NEED_RTNL,
7225         },
7226         {
7227                 .cmd = NL80211_CMD_NEW_INTERFACE,
7228                 .doit = nl80211_new_interface,
7229                 .policy = nl80211_policy,
7230                 .flags = GENL_ADMIN_PERM,
7231                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7232                                   NL80211_FLAG_NEED_RTNL,
7233         },
7234         {
7235                 .cmd = NL80211_CMD_DEL_INTERFACE,
7236                 .doit = nl80211_del_interface,
7237                 .policy = nl80211_policy,
7238                 .flags = GENL_ADMIN_PERM,
7239                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7240                                   NL80211_FLAG_NEED_RTNL,
7241         },
7242         {
7243                 .cmd = NL80211_CMD_GET_KEY,
7244                 .doit = nl80211_get_key,
7245                 .policy = nl80211_policy,
7246                 .flags = GENL_ADMIN_PERM,
7247                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7248                                   NL80211_FLAG_NEED_RTNL,
7249         },
7250         {
7251                 .cmd = NL80211_CMD_SET_KEY,
7252                 .doit = nl80211_set_key,
7253                 .policy = nl80211_policy,
7254                 .flags = GENL_ADMIN_PERM,
7255                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7256                                   NL80211_FLAG_NEED_RTNL,
7257         },
7258         {
7259                 .cmd = NL80211_CMD_NEW_KEY,
7260                 .doit = nl80211_new_key,
7261                 .policy = nl80211_policy,
7262                 .flags = GENL_ADMIN_PERM,
7263                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7264                                   NL80211_FLAG_NEED_RTNL,
7265         },
7266         {
7267                 .cmd = NL80211_CMD_DEL_KEY,
7268                 .doit = nl80211_del_key,
7269                 .policy = nl80211_policy,
7270                 .flags = GENL_ADMIN_PERM,
7271                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7272                                   NL80211_FLAG_NEED_RTNL,
7273         },
7274         {
7275                 .cmd = NL80211_CMD_SET_BEACON,
7276                 .policy = nl80211_policy,
7277                 .flags = GENL_ADMIN_PERM,
7278                 .doit = nl80211_set_beacon,
7279                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7280                                   NL80211_FLAG_NEED_RTNL,
7281         },
7282         {
7283                 .cmd = NL80211_CMD_START_AP,
7284                 .policy = nl80211_policy,
7285                 .flags = GENL_ADMIN_PERM,
7286                 .doit = nl80211_start_ap,
7287                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7288                                   NL80211_FLAG_NEED_RTNL,
7289         },
7290         {
7291                 .cmd = NL80211_CMD_STOP_AP,
7292                 .policy = nl80211_policy,
7293                 .flags = GENL_ADMIN_PERM,
7294                 .doit = nl80211_stop_ap,
7295                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7296                                   NL80211_FLAG_NEED_RTNL,
7297         },
7298         {
7299                 .cmd = NL80211_CMD_GET_STATION,
7300                 .doit = nl80211_get_station,
7301                 .dumpit = nl80211_dump_station,
7302                 .policy = nl80211_policy,
7303                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7304                                   NL80211_FLAG_NEED_RTNL,
7305         },
7306         {
7307                 .cmd = NL80211_CMD_SET_STATION,
7308                 .doit = nl80211_set_station,
7309                 .policy = nl80211_policy,
7310                 .flags = GENL_ADMIN_PERM,
7311                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7312                                   NL80211_FLAG_NEED_RTNL,
7313         },
7314         {
7315                 .cmd = NL80211_CMD_NEW_STATION,
7316                 .doit = nl80211_new_station,
7317                 .policy = nl80211_policy,
7318                 .flags = GENL_ADMIN_PERM,
7319                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7320                                   NL80211_FLAG_NEED_RTNL,
7321         },
7322         {
7323                 .cmd = NL80211_CMD_DEL_STATION,
7324                 .doit = nl80211_del_station,
7325                 .policy = nl80211_policy,
7326                 .flags = GENL_ADMIN_PERM,
7327                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7328                                   NL80211_FLAG_NEED_RTNL,
7329         },
7330         {
7331                 .cmd = NL80211_CMD_GET_MPATH,
7332                 .doit = nl80211_get_mpath,
7333                 .dumpit = nl80211_dump_mpath,
7334                 .policy = nl80211_policy,
7335                 .flags = GENL_ADMIN_PERM,
7336                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7337                                   NL80211_FLAG_NEED_RTNL,
7338         },
7339         {
7340                 .cmd = NL80211_CMD_SET_MPATH,
7341                 .doit = nl80211_set_mpath,
7342                 .policy = nl80211_policy,
7343                 .flags = GENL_ADMIN_PERM,
7344                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7345                                   NL80211_FLAG_NEED_RTNL,
7346         },
7347         {
7348                 .cmd = NL80211_CMD_NEW_MPATH,
7349                 .doit = nl80211_new_mpath,
7350                 .policy = nl80211_policy,
7351                 .flags = GENL_ADMIN_PERM,
7352                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7353                                   NL80211_FLAG_NEED_RTNL,
7354         },
7355         {
7356                 .cmd = NL80211_CMD_DEL_MPATH,
7357                 .doit = nl80211_del_mpath,
7358                 .policy = nl80211_policy,
7359                 .flags = GENL_ADMIN_PERM,
7360                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7361                                   NL80211_FLAG_NEED_RTNL,
7362         },
7363         {
7364                 .cmd = NL80211_CMD_SET_BSS,
7365                 .doit = nl80211_set_bss,
7366                 .policy = nl80211_policy,
7367                 .flags = GENL_ADMIN_PERM,
7368                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7369                                   NL80211_FLAG_NEED_RTNL,
7370         },
7371         {
7372                 .cmd = NL80211_CMD_GET_REG,
7373                 .doit = nl80211_get_reg,
7374                 .policy = nl80211_policy,
7375                 /* can be retrieved by unprivileged users */
7376         },
7377         {
7378                 .cmd = NL80211_CMD_SET_REG,
7379                 .doit = nl80211_set_reg,
7380                 .policy = nl80211_policy,
7381                 .flags = GENL_ADMIN_PERM,
7382         },
7383         {
7384                 .cmd = NL80211_CMD_REQ_SET_REG,
7385                 .doit = nl80211_req_set_reg,
7386                 .policy = nl80211_policy,
7387                 .flags = GENL_ADMIN_PERM,
7388         },
7389         {
7390                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7391                 .doit = nl80211_get_mesh_config,
7392                 .policy = nl80211_policy,
7393                 /* can be retrieved by unprivileged users */
7394                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7395                                   NL80211_FLAG_NEED_RTNL,
7396         },
7397         {
7398                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7399                 .doit = nl80211_update_mesh_config,
7400                 .policy = nl80211_policy,
7401                 .flags = GENL_ADMIN_PERM,
7402                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7403                                   NL80211_FLAG_NEED_RTNL,
7404         },
7405         {
7406                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7407                 .doit = nl80211_trigger_scan,
7408                 .policy = nl80211_policy,
7409                 .flags = GENL_ADMIN_PERM,
7410                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7411                                   NL80211_FLAG_NEED_RTNL,
7412         },
7413         {
7414                 .cmd = NL80211_CMD_GET_SCAN,
7415                 .policy = nl80211_policy,
7416                 .dumpit = nl80211_dump_scan,
7417         },
7418         {
7419                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7420                 .doit = nl80211_start_sched_scan,
7421                 .policy = nl80211_policy,
7422                 .flags = GENL_ADMIN_PERM,
7423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7424                                   NL80211_FLAG_NEED_RTNL,
7425         },
7426         {
7427                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7428                 .doit = nl80211_stop_sched_scan,
7429                 .policy = nl80211_policy,
7430                 .flags = GENL_ADMIN_PERM,
7431                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7432                                   NL80211_FLAG_NEED_RTNL,
7433         },
7434         {
7435                 .cmd = NL80211_CMD_AUTHENTICATE,
7436                 .doit = nl80211_authenticate,
7437                 .policy = nl80211_policy,
7438                 .flags = GENL_ADMIN_PERM,
7439                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7440                                   NL80211_FLAG_NEED_RTNL,
7441         },
7442         {
7443                 .cmd = NL80211_CMD_ASSOCIATE,
7444                 .doit = nl80211_associate,
7445                 .policy = nl80211_policy,
7446                 .flags = GENL_ADMIN_PERM,
7447                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7448                                   NL80211_FLAG_NEED_RTNL,
7449         },
7450         {
7451                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7452                 .doit = nl80211_deauthenticate,
7453                 .policy = nl80211_policy,
7454                 .flags = GENL_ADMIN_PERM,
7455                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7456                                   NL80211_FLAG_NEED_RTNL,
7457         },
7458         {
7459                 .cmd = NL80211_CMD_DISASSOCIATE,
7460                 .doit = nl80211_disassociate,
7461                 .policy = nl80211_policy,
7462                 .flags = GENL_ADMIN_PERM,
7463                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7464                                   NL80211_FLAG_NEED_RTNL,
7465         },
7466         {
7467                 .cmd = NL80211_CMD_JOIN_IBSS,
7468                 .doit = nl80211_join_ibss,
7469                 .policy = nl80211_policy,
7470                 .flags = GENL_ADMIN_PERM,
7471                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7472                                   NL80211_FLAG_NEED_RTNL,
7473         },
7474         {
7475                 .cmd = NL80211_CMD_LEAVE_IBSS,
7476                 .doit = nl80211_leave_ibss,
7477                 .policy = nl80211_policy,
7478                 .flags = GENL_ADMIN_PERM,
7479                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7480                                   NL80211_FLAG_NEED_RTNL,
7481         },
7482 #ifdef CONFIG_NL80211_TESTMODE
7483         {
7484                 .cmd = NL80211_CMD_TESTMODE,
7485                 .doit = nl80211_testmode_do,
7486                 .dumpit = nl80211_testmode_dump,
7487                 .policy = nl80211_policy,
7488                 .flags = GENL_ADMIN_PERM,
7489                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7490                                   NL80211_FLAG_NEED_RTNL,
7491         },
7492 #endif
7493         {
7494                 .cmd = NL80211_CMD_CONNECT,
7495                 .doit = nl80211_connect,
7496                 .policy = nl80211_policy,
7497                 .flags = GENL_ADMIN_PERM,
7498                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7499                                   NL80211_FLAG_NEED_RTNL,
7500         },
7501         {
7502                 .cmd = NL80211_CMD_DISCONNECT,
7503                 .doit = nl80211_disconnect,
7504                 .policy = nl80211_policy,
7505                 .flags = GENL_ADMIN_PERM,
7506                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7507                                   NL80211_FLAG_NEED_RTNL,
7508         },
7509         {
7510                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7511                 .doit = nl80211_wiphy_netns,
7512                 .policy = nl80211_policy,
7513                 .flags = GENL_ADMIN_PERM,
7514                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7515                                   NL80211_FLAG_NEED_RTNL,
7516         },
7517         {
7518                 .cmd = NL80211_CMD_GET_SURVEY,
7519                 .policy = nl80211_policy,
7520                 .dumpit = nl80211_dump_survey,
7521         },
7522         {
7523                 .cmd = NL80211_CMD_SET_PMKSA,
7524                 .doit = nl80211_setdel_pmksa,
7525                 .policy = nl80211_policy,
7526                 .flags = GENL_ADMIN_PERM,
7527                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7528                                   NL80211_FLAG_NEED_RTNL,
7529         },
7530         {
7531                 .cmd = NL80211_CMD_DEL_PMKSA,
7532                 .doit = nl80211_setdel_pmksa,
7533                 .policy = nl80211_policy,
7534                 .flags = GENL_ADMIN_PERM,
7535                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7536                                   NL80211_FLAG_NEED_RTNL,
7537         },
7538         {
7539                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7540                 .doit = nl80211_flush_pmksa,
7541                 .policy = nl80211_policy,
7542                 .flags = GENL_ADMIN_PERM,
7543                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7544                                   NL80211_FLAG_NEED_RTNL,
7545         },
7546         {
7547                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7548                 .doit = nl80211_remain_on_channel,
7549                 .policy = nl80211_policy,
7550                 .flags = GENL_ADMIN_PERM,
7551                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7552                                   NL80211_FLAG_NEED_RTNL,
7553         },
7554         {
7555                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7556                 .doit = nl80211_cancel_remain_on_channel,
7557                 .policy = nl80211_policy,
7558                 .flags = GENL_ADMIN_PERM,
7559                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7560                                   NL80211_FLAG_NEED_RTNL,
7561         },
7562         {
7563                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7564                 .doit = nl80211_set_tx_bitrate_mask,
7565                 .policy = nl80211_policy,
7566                 .flags = GENL_ADMIN_PERM,
7567                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7568                                   NL80211_FLAG_NEED_RTNL,
7569         },
7570         {
7571                 .cmd = NL80211_CMD_REGISTER_FRAME,
7572                 .doit = nl80211_register_mgmt,
7573                 .policy = nl80211_policy,
7574                 .flags = GENL_ADMIN_PERM,
7575                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7576                                   NL80211_FLAG_NEED_RTNL,
7577         },
7578         {
7579                 .cmd = NL80211_CMD_FRAME,
7580                 .doit = nl80211_tx_mgmt,
7581                 .policy = nl80211_policy,
7582                 .flags = GENL_ADMIN_PERM,
7583                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7584                                   NL80211_FLAG_NEED_RTNL,
7585         },
7586         {
7587                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7588                 .doit = nl80211_tx_mgmt_cancel_wait,
7589                 .policy = nl80211_policy,
7590                 .flags = GENL_ADMIN_PERM,
7591                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7592                                   NL80211_FLAG_NEED_RTNL,
7593         },
7594         {
7595                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7596                 .doit = nl80211_set_power_save,
7597                 .policy = nl80211_policy,
7598                 .flags = GENL_ADMIN_PERM,
7599                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7600                                   NL80211_FLAG_NEED_RTNL,
7601         },
7602         {
7603                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7604                 .doit = nl80211_get_power_save,
7605                 .policy = nl80211_policy,
7606                 /* can be retrieved by unprivileged users */
7607                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7608                                   NL80211_FLAG_NEED_RTNL,
7609         },
7610         {
7611                 .cmd = NL80211_CMD_SET_CQM,
7612                 .doit = nl80211_set_cqm,
7613                 .policy = nl80211_policy,
7614                 .flags = GENL_ADMIN_PERM,
7615                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7616                                   NL80211_FLAG_NEED_RTNL,
7617         },
7618         {
7619                 .cmd = NL80211_CMD_SET_CHANNEL,
7620                 .doit = nl80211_set_channel,
7621                 .policy = nl80211_policy,
7622                 .flags = GENL_ADMIN_PERM,
7623                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7624                                   NL80211_FLAG_NEED_RTNL,
7625         },
7626         {
7627                 .cmd = NL80211_CMD_SET_WDS_PEER,
7628                 .doit = nl80211_set_wds_peer,
7629                 .policy = nl80211_policy,
7630                 .flags = GENL_ADMIN_PERM,
7631                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7632                                   NL80211_FLAG_NEED_RTNL,
7633         },
7634         {
7635                 .cmd = NL80211_CMD_JOIN_MESH,
7636                 .doit = nl80211_join_mesh,
7637                 .policy = nl80211_policy,
7638                 .flags = GENL_ADMIN_PERM,
7639                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7640                                   NL80211_FLAG_NEED_RTNL,
7641         },
7642         {
7643                 .cmd = NL80211_CMD_LEAVE_MESH,
7644                 .doit = nl80211_leave_mesh,
7645                 .policy = nl80211_policy,
7646                 .flags = GENL_ADMIN_PERM,
7647                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7648                                   NL80211_FLAG_NEED_RTNL,
7649         },
7650 #ifdef CONFIG_PM
7651         {
7652                 .cmd = NL80211_CMD_GET_WOWLAN,
7653                 .doit = nl80211_get_wowlan,
7654                 .policy = nl80211_policy,
7655                 /* can be retrieved by unprivileged users */
7656                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7657                                   NL80211_FLAG_NEED_RTNL,
7658         },
7659         {
7660                 .cmd = NL80211_CMD_SET_WOWLAN,
7661                 .doit = nl80211_set_wowlan,
7662                 .policy = nl80211_policy,
7663                 .flags = GENL_ADMIN_PERM,
7664                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7665                                   NL80211_FLAG_NEED_RTNL,
7666         },
7667 #endif
7668         {
7669                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7670                 .doit = nl80211_set_rekey_data,
7671                 .policy = nl80211_policy,
7672                 .flags = GENL_ADMIN_PERM,
7673                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7674                                   NL80211_FLAG_NEED_RTNL,
7675         },
7676         {
7677                 .cmd = NL80211_CMD_TDLS_MGMT,
7678                 .doit = nl80211_tdls_mgmt,
7679                 .policy = nl80211_policy,
7680                 .flags = GENL_ADMIN_PERM,
7681                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7682                                   NL80211_FLAG_NEED_RTNL,
7683         },
7684         {
7685                 .cmd = NL80211_CMD_TDLS_OPER,
7686                 .doit = nl80211_tdls_oper,
7687                 .policy = nl80211_policy,
7688                 .flags = GENL_ADMIN_PERM,
7689                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7690                                   NL80211_FLAG_NEED_RTNL,
7691         },
7692         {
7693                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7694                 .doit = nl80211_register_unexpected_frame,
7695                 .policy = nl80211_policy,
7696                 .flags = GENL_ADMIN_PERM,
7697                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7698                                   NL80211_FLAG_NEED_RTNL,
7699         },
7700         {
7701                 .cmd = NL80211_CMD_PROBE_CLIENT,
7702                 .doit = nl80211_probe_client,
7703                 .policy = nl80211_policy,
7704                 .flags = GENL_ADMIN_PERM,
7705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7706                                   NL80211_FLAG_NEED_RTNL,
7707         },
7708         {
7709                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7710                 .doit = nl80211_register_beacons,
7711                 .policy = nl80211_policy,
7712                 .flags = GENL_ADMIN_PERM,
7713                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7714                                   NL80211_FLAG_NEED_RTNL,
7715         },
7716         {
7717                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7718                 .doit = nl80211_set_noack_map,
7719                 .policy = nl80211_policy,
7720                 .flags = GENL_ADMIN_PERM,
7721                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7722                                   NL80211_FLAG_NEED_RTNL,
7723         },
7724         {
7725                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7726                 .doit = nl80211_start_p2p_device,
7727                 .policy = nl80211_policy,
7728                 .flags = GENL_ADMIN_PERM,
7729                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7730                                   NL80211_FLAG_NEED_RTNL,
7731         },
7732         {
7733                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7734                 .doit = nl80211_stop_p2p_device,
7735                 .policy = nl80211_policy,
7736                 .flags = GENL_ADMIN_PERM,
7737                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7738                                   NL80211_FLAG_NEED_RTNL,
7739         },
7740         {
7741                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7742                 .doit = nl80211_set_mcast_rate,
7743                 .policy = nl80211_policy,
7744                 .flags = GENL_ADMIN_PERM,
7745                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7746                                   NL80211_FLAG_NEED_RTNL,
7747         },
7748 };
7749
7750 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7751         .name = "mlme",
7752 };
7753
7754 /* multicast groups */
7755 static struct genl_multicast_group nl80211_config_mcgrp = {
7756         .name = "config",
7757 };
7758 static struct genl_multicast_group nl80211_scan_mcgrp = {
7759         .name = "scan",
7760 };
7761 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7762         .name = "regulatory",
7763 };
7764
7765 /* notification functions */
7766
7767 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7768 {
7769         struct sk_buff *msg;
7770
7771         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7772         if (!msg)
7773                 return;
7774
7775         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7776                 nlmsg_free(msg);
7777                 return;
7778         }
7779
7780         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7781                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7782 }
7783
7784 static int nl80211_add_scan_req(struct sk_buff *msg,
7785                                 struct cfg80211_registered_device *rdev)
7786 {
7787         struct cfg80211_scan_request *req = rdev->scan_req;
7788         struct nlattr *nest;
7789         int i;
7790
7791         ASSERT_RDEV_LOCK(rdev);
7792
7793         if (WARN_ON(!req))
7794                 return 0;
7795
7796         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7797         if (!nest)
7798                 goto nla_put_failure;
7799         for (i = 0; i < req->n_ssids; i++) {
7800                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7801                         goto nla_put_failure;
7802         }
7803         nla_nest_end(msg, nest);
7804
7805         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7806         if (!nest)
7807                 goto nla_put_failure;
7808         for (i = 0; i < req->n_channels; i++) {
7809                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7810                         goto nla_put_failure;
7811         }
7812         nla_nest_end(msg, nest);
7813
7814         if (req->ie &&
7815             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7816                 goto nla_put_failure;
7817
7818         if (req->flags)
7819                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7820
7821         return 0;
7822  nla_put_failure:
7823         return -ENOBUFS;
7824 }
7825
7826 static int nl80211_send_scan_msg(struct sk_buff *msg,
7827                                  struct cfg80211_registered_device *rdev,
7828                                  struct wireless_dev *wdev,
7829                                  u32 portid, u32 seq, int flags,
7830                                  u32 cmd)
7831 {
7832         void *hdr;
7833
7834         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7835         if (!hdr)
7836                 return -1;
7837
7838         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7839             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7840                                          wdev->netdev->ifindex)) ||
7841             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7842                 goto nla_put_failure;
7843
7844         /* ignore errors and send incomplete event anyway */
7845         nl80211_add_scan_req(msg, rdev);
7846
7847         return genlmsg_end(msg, hdr);
7848
7849  nla_put_failure:
7850         genlmsg_cancel(msg, hdr);
7851         return -EMSGSIZE;
7852 }
7853
7854 static int
7855 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7856                             struct cfg80211_registered_device *rdev,
7857                             struct net_device *netdev,
7858                             u32 portid, u32 seq, int flags, u32 cmd)
7859 {
7860         void *hdr;
7861
7862         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7863         if (!hdr)
7864                 return -1;
7865
7866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7867             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7868                 goto nla_put_failure;
7869
7870         return genlmsg_end(msg, hdr);
7871
7872  nla_put_failure:
7873         genlmsg_cancel(msg, hdr);
7874         return -EMSGSIZE;
7875 }
7876
7877 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7878                              struct wireless_dev *wdev)
7879 {
7880         struct sk_buff *msg;
7881
7882         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7883         if (!msg)
7884                 return;
7885
7886         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7887                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7888                 nlmsg_free(msg);
7889                 return;
7890         }
7891
7892         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7893                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7894 }
7895
7896 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7897                             struct wireless_dev *wdev)
7898 {
7899         struct sk_buff *msg;
7900
7901         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7902         if (!msg)
7903                 return;
7904
7905         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7906                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7907                 nlmsg_free(msg);
7908                 return;
7909         }
7910
7911         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7912                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7913 }
7914
7915 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7916                                struct wireless_dev *wdev)
7917 {
7918         struct sk_buff *msg;
7919
7920         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7921         if (!msg)
7922                 return;
7923
7924         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7925                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7926                 nlmsg_free(msg);
7927                 return;
7928         }
7929
7930         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7931                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7932 }
7933
7934 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7935                                      struct net_device *netdev)
7936 {
7937         struct sk_buff *msg;
7938
7939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7940         if (!msg)
7941                 return;
7942
7943         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7944                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7945                 nlmsg_free(msg);
7946                 return;
7947         }
7948
7949         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7950                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7951 }
7952
7953 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7954                              struct net_device *netdev, u32 cmd)
7955 {
7956         struct sk_buff *msg;
7957
7958         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7959         if (!msg)
7960                 return;
7961
7962         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7963                 nlmsg_free(msg);
7964                 return;
7965         }
7966
7967         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7968                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7969 }
7970
7971 /*
7972  * This can happen on global regulatory changes or device specific settings
7973  * based on custom world regulatory domains.
7974  */
7975 void nl80211_send_reg_change_event(struct regulatory_request *request)
7976 {
7977         struct sk_buff *msg;
7978         void *hdr;
7979
7980         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7981         if (!msg)
7982                 return;
7983
7984         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7985         if (!hdr) {
7986                 nlmsg_free(msg);
7987                 return;
7988         }
7989
7990         /* Userspace can always count this one always being set */
7991         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7992                 goto nla_put_failure;
7993
7994         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7995                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7996                                NL80211_REGDOM_TYPE_WORLD))
7997                         goto nla_put_failure;
7998         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7999                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8000                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8001                         goto nla_put_failure;
8002         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8003                    request->intersect) {
8004                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8005                                NL80211_REGDOM_TYPE_INTERSECTION))
8006                         goto nla_put_failure;
8007         } else {
8008                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8009                                NL80211_REGDOM_TYPE_COUNTRY) ||
8010                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8011                                    request->alpha2))
8012                         goto nla_put_failure;
8013         }
8014
8015         if (wiphy_idx_valid(request->wiphy_idx) &&
8016             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8017                 goto nla_put_failure;
8018
8019         genlmsg_end(msg, hdr);
8020
8021         rcu_read_lock();
8022         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8023                                 GFP_ATOMIC);
8024         rcu_read_unlock();
8025
8026         return;
8027
8028 nla_put_failure:
8029         genlmsg_cancel(msg, hdr);
8030         nlmsg_free(msg);
8031 }
8032
8033 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8034                                     struct net_device *netdev,
8035                                     const u8 *buf, size_t len,
8036                                     enum nl80211_commands cmd, gfp_t gfp)
8037 {
8038         struct sk_buff *msg;
8039         void *hdr;
8040
8041         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8042         if (!msg)
8043                 return;
8044
8045         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8046         if (!hdr) {
8047                 nlmsg_free(msg);
8048                 return;
8049         }
8050
8051         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8052             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8053             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8054                 goto nla_put_failure;
8055
8056         genlmsg_end(msg, hdr);
8057
8058         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8059                                 nl80211_mlme_mcgrp.id, gfp);
8060         return;
8061
8062  nla_put_failure:
8063         genlmsg_cancel(msg, hdr);
8064         nlmsg_free(msg);
8065 }
8066
8067 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8068                           struct net_device *netdev, const u8 *buf,
8069                           size_t len, gfp_t gfp)
8070 {
8071         nl80211_send_mlme_event(rdev, netdev, buf, len,
8072                                 NL80211_CMD_AUTHENTICATE, gfp);
8073 }
8074
8075 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8076                            struct net_device *netdev, const u8 *buf,
8077                            size_t len, gfp_t gfp)
8078 {
8079         nl80211_send_mlme_event(rdev, netdev, buf, len,
8080                                 NL80211_CMD_ASSOCIATE, gfp);
8081 }
8082
8083 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8084                          struct net_device *netdev, const u8 *buf,
8085                          size_t len, gfp_t gfp)
8086 {
8087         nl80211_send_mlme_event(rdev, netdev, buf, len,
8088                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8089 }
8090
8091 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8092                            struct net_device *netdev, const u8 *buf,
8093                            size_t len, gfp_t gfp)
8094 {
8095         nl80211_send_mlme_event(rdev, netdev, buf, len,
8096                                 NL80211_CMD_DISASSOCIATE, gfp);
8097 }
8098
8099 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8100                                 struct net_device *netdev, const u8 *buf,
8101                                 size_t len, gfp_t gfp)
8102 {
8103         nl80211_send_mlme_event(rdev, netdev, buf, len,
8104                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8105 }
8106
8107 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8108                                   struct net_device *netdev, const u8 *buf,
8109                                   size_t len, gfp_t gfp)
8110 {
8111         nl80211_send_mlme_event(rdev, netdev, buf, len,
8112                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8113 }
8114
8115 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8116                                       struct net_device *netdev, int cmd,
8117                                       const u8 *addr, gfp_t gfp)
8118 {
8119         struct sk_buff *msg;
8120         void *hdr;
8121
8122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8123         if (!msg)
8124                 return;
8125
8126         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8127         if (!hdr) {
8128                 nlmsg_free(msg);
8129                 return;
8130         }
8131
8132         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8133             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8134             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8135             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8136                 goto nla_put_failure;
8137
8138         genlmsg_end(msg, hdr);
8139
8140         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8141                                 nl80211_mlme_mcgrp.id, gfp);
8142         return;
8143
8144  nla_put_failure:
8145         genlmsg_cancel(msg, hdr);
8146         nlmsg_free(msg);
8147 }
8148
8149 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8150                                struct net_device *netdev, const u8 *addr,
8151                                gfp_t gfp)
8152 {
8153         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8154                                   addr, gfp);
8155 }
8156
8157 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8158                                 struct net_device *netdev, const u8 *addr,
8159                                 gfp_t gfp)
8160 {
8161         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8162                                   addr, gfp);
8163 }
8164
8165 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8166                                  struct net_device *netdev, const u8 *bssid,
8167                                  const u8 *req_ie, size_t req_ie_len,
8168                                  const u8 *resp_ie, size_t resp_ie_len,
8169                                  u16 status, gfp_t gfp)
8170 {
8171         struct sk_buff *msg;
8172         void *hdr;
8173
8174         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8175         if (!msg)
8176                 return;
8177
8178         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8179         if (!hdr) {
8180                 nlmsg_free(msg);
8181                 return;
8182         }
8183
8184         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8185             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8186             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8187             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8188             (req_ie &&
8189              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8190             (resp_ie &&
8191              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8192                 goto nla_put_failure;
8193
8194         genlmsg_end(msg, hdr);
8195
8196         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8197                                 nl80211_mlme_mcgrp.id, gfp);
8198         return;
8199
8200  nla_put_failure:
8201         genlmsg_cancel(msg, hdr);
8202         nlmsg_free(msg);
8203
8204 }
8205
8206 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8207                          struct net_device *netdev, const u8 *bssid,
8208                          const u8 *req_ie, size_t req_ie_len,
8209                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8210 {
8211         struct sk_buff *msg;
8212         void *hdr;
8213
8214         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8215         if (!msg)
8216                 return;
8217
8218         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8219         if (!hdr) {
8220                 nlmsg_free(msg);
8221                 return;
8222         }
8223
8224         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8225             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8226             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8227             (req_ie &&
8228              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8229             (resp_ie &&
8230              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8231                 goto nla_put_failure;
8232
8233         genlmsg_end(msg, hdr);
8234
8235         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8236                                 nl80211_mlme_mcgrp.id, gfp);
8237         return;
8238
8239  nla_put_failure:
8240         genlmsg_cancel(msg, hdr);
8241         nlmsg_free(msg);
8242
8243 }
8244
8245 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8246                                struct net_device *netdev, u16 reason,
8247                                const u8 *ie, size_t ie_len, bool from_ap)
8248 {
8249         struct sk_buff *msg;
8250         void *hdr;
8251
8252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8253         if (!msg)
8254                 return;
8255
8256         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8257         if (!hdr) {
8258                 nlmsg_free(msg);
8259                 return;
8260         }
8261
8262         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8263             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8264             (from_ap && reason &&
8265              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8266             (from_ap &&
8267              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8268             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8269                 goto nla_put_failure;
8270
8271         genlmsg_end(msg, hdr);
8272
8273         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8274                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8275         return;
8276
8277  nla_put_failure:
8278         genlmsg_cancel(msg, hdr);
8279         nlmsg_free(msg);
8280
8281 }
8282
8283 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8284                              struct net_device *netdev, const u8 *bssid,
8285                              gfp_t gfp)
8286 {
8287         struct sk_buff *msg;
8288         void *hdr;
8289
8290         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8291         if (!msg)
8292                 return;
8293
8294         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8295         if (!hdr) {
8296                 nlmsg_free(msg);
8297                 return;
8298         }
8299
8300         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8301             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8302             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8303                 goto nla_put_failure;
8304
8305         genlmsg_end(msg, hdr);
8306
8307         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8308                                 nl80211_mlme_mcgrp.id, gfp);
8309         return;
8310
8311  nla_put_failure:
8312         genlmsg_cancel(msg, hdr);
8313         nlmsg_free(msg);
8314 }
8315
8316 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8317                 struct net_device *netdev,
8318                 const u8 *macaddr, const u8* ie, u8 ie_len,
8319                 gfp_t gfp)
8320 {
8321         struct sk_buff *msg;
8322         void *hdr;
8323
8324         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8325         if (!msg)
8326                 return;
8327
8328         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8329         if (!hdr) {
8330                 nlmsg_free(msg);
8331                 return;
8332         }
8333
8334         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8335             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8336             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8337             (ie_len && ie &&
8338              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8339                 goto nla_put_failure;
8340
8341         genlmsg_end(msg, hdr);
8342
8343         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8344                                 nl80211_mlme_mcgrp.id, gfp);
8345         return;
8346
8347  nla_put_failure:
8348         genlmsg_cancel(msg, hdr);
8349         nlmsg_free(msg);
8350 }
8351
8352 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8353                                  struct net_device *netdev, const u8 *addr,
8354                                  enum nl80211_key_type key_type, int key_id,
8355                                  const u8 *tsc, gfp_t gfp)
8356 {
8357         struct sk_buff *msg;
8358         void *hdr;
8359
8360         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8361         if (!msg)
8362                 return;
8363
8364         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8365         if (!hdr) {
8366                 nlmsg_free(msg);
8367                 return;
8368         }
8369
8370         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8371             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8372             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8373             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8374             (key_id != -1 &&
8375              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8376             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8377                 goto nla_put_failure;
8378
8379         genlmsg_end(msg, hdr);
8380
8381         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8382                                 nl80211_mlme_mcgrp.id, gfp);
8383         return;
8384
8385  nla_put_failure:
8386         genlmsg_cancel(msg, hdr);
8387         nlmsg_free(msg);
8388 }
8389
8390 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8391                                     struct ieee80211_channel *channel_before,
8392                                     struct ieee80211_channel *channel_after)
8393 {
8394         struct sk_buff *msg;
8395         void *hdr;
8396         struct nlattr *nl_freq;
8397
8398         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8399         if (!msg)
8400                 return;
8401
8402         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8403         if (!hdr) {
8404                 nlmsg_free(msg);
8405                 return;
8406         }
8407
8408         /*
8409          * Since we are applying the beacon hint to a wiphy we know its
8410          * wiphy_idx is valid
8411          */
8412         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8413                 goto nla_put_failure;
8414
8415         /* Before */
8416         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8417         if (!nl_freq)
8418                 goto nla_put_failure;
8419         if (nl80211_msg_put_channel(msg, channel_before))
8420                 goto nla_put_failure;
8421         nla_nest_end(msg, nl_freq);
8422
8423         /* After */
8424         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8425         if (!nl_freq)
8426                 goto nla_put_failure;
8427         if (nl80211_msg_put_channel(msg, channel_after))
8428                 goto nla_put_failure;
8429         nla_nest_end(msg, nl_freq);
8430
8431         genlmsg_end(msg, hdr);
8432
8433         rcu_read_lock();
8434         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8435                                 GFP_ATOMIC);
8436         rcu_read_unlock();
8437
8438         return;
8439
8440 nla_put_failure:
8441         genlmsg_cancel(msg, hdr);
8442         nlmsg_free(msg);
8443 }
8444
8445 static void nl80211_send_remain_on_chan_event(
8446         int cmd, struct cfg80211_registered_device *rdev,
8447         struct wireless_dev *wdev, u64 cookie,
8448         struct ieee80211_channel *chan,
8449         unsigned int duration, gfp_t gfp)
8450 {
8451         struct sk_buff *msg;
8452         void *hdr;
8453
8454         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8455         if (!msg)
8456                 return;
8457
8458         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8459         if (!hdr) {
8460                 nlmsg_free(msg);
8461                 return;
8462         }
8463
8464         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8465             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8466                                          wdev->netdev->ifindex)) ||
8467             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8468             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8469             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8470                         NL80211_CHAN_NO_HT) ||
8471             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8472                 goto nla_put_failure;
8473
8474         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8475             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8476                 goto nla_put_failure;
8477
8478         genlmsg_end(msg, hdr);
8479
8480         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8481                                 nl80211_mlme_mcgrp.id, gfp);
8482         return;
8483
8484  nla_put_failure:
8485         genlmsg_cancel(msg, hdr);
8486         nlmsg_free(msg);
8487 }
8488
8489 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8490                                     struct wireless_dev *wdev, u64 cookie,
8491                                     struct ieee80211_channel *chan,
8492                                     unsigned int duration, gfp_t gfp)
8493 {
8494         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8495                                           rdev, wdev, cookie, chan,
8496                                           duration, gfp);
8497 }
8498
8499 void nl80211_send_remain_on_channel_cancel(
8500         struct cfg80211_registered_device *rdev,
8501         struct wireless_dev *wdev,
8502         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8503 {
8504         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8505                                           rdev, wdev, cookie, chan, 0, gfp);
8506 }
8507
8508 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8509                             struct net_device *dev, const u8 *mac_addr,
8510                             struct station_info *sinfo, gfp_t gfp)
8511 {
8512         struct sk_buff *msg;
8513
8514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8515         if (!msg)
8516                 return;
8517
8518         if (nl80211_send_station(msg, 0, 0, 0,
8519                                  rdev, dev, mac_addr, sinfo) < 0) {
8520                 nlmsg_free(msg);
8521                 return;
8522         }
8523
8524         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8525                                 nl80211_mlme_mcgrp.id, gfp);
8526 }
8527
8528 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8529                                 struct net_device *dev, const u8 *mac_addr,
8530                                 gfp_t gfp)
8531 {
8532         struct sk_buff *msg;
8533         void *hdr;
8534
8535         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8536         if (!msg)
8537                 return;
8538
8539         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8540         if (!hdr) {
8541                 nlmsg_free(msg);
8542                 return;
8543         }
8544
8545         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8546             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8547                 goto nla_put_failure;
8548
8549         genlmsg_end(msg, hdr);
8550
8551         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8552                                 nl80211_mlme_mcgrp.id, gfp);
8553         return;
8554
8555  nla_put_failure:
8556         genlmsg_cancel(msg, hdr);
8557         nlmsg_free(msg);
8558 }
8559
8560 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8561                                     struct net_device *dev, const u8 *mac_addr,
8562                                     enum nl80211_connect_failed_reason reason,
8563                                     gfp_t gfp)
8564 {
8565         struct sk_buff *msg;
8566         void *hdr;
8567
8568         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8569         if (!msg)
8570                 return;
8571
8572         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8573         if (!hdr) {
8574                 nlmsg_free(msg);
8575                 return;
8576         }
8577
8578         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8579             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8580             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8581                 goto nla_put_failure;
8582
8583         genlmsg_end(msg, hdr);
8584
8585         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8586                                 nl80211_mlme_mcgrp.id, gfp);
8587         return;
8588
8589  nla_put_failure:
8590         genlmsg_cancel(msg, hdr);
8591         nlmsg_free(msg);
8592 }
8593
8594 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8595                                        const u8 *addr, gfp_t gfp)
8596 {
8597         struct wireless_dev *wdev = dev->ieee80211_ptr;
8598         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8599         struct sk_buff *msg;
8600         void *hdr;
8601         int err;
8602         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8603
8604         if (!nlportid)
8605                 return false;
8606
8607         msg = nlmsg_new(100, gfp);
8608         if (!msg)
8609                 return true;
8610
8611         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8612         if (!hdr) {
8613                 nlmsg_free(msg);
8614                 return true;
8615         }
8616
8617         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8618             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8619             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8620                 goto nla_put_failure;
8621
8622         err = genlmsg_end(msg, hdr);
8623         if (err < 0) {
8624                 nlmsg_free(msg);
8625                 return true;
8626         }
8627
8628         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8629         return true;
8630
8631  nla_put_failure:
8632         genlmsg_cancel(msg, hdr);
8633         nlmsg_free(msg);
8634         return true;
8635 }
8636
8637 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8638 {
8639         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8640                                           addr, gfp);
8641 }
8642
8643 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8644                                     const u8 *addr, gfp_t gfp)
8645 {
8646         return __nl80211_unexpected_frame(dev,
8647                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8648                                           addr, gfp);
8649 }
8650
8651 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8652                       struct wireless_dev *wdev, u32 nlportid,
8653                       int freq, int sig_dbm,
8654                       const u8 *buf, size_t len, gfp_t gfp)
8655 {
8656         struct net_device *netdev = wdev->netdev;
8657         struct sk_buff *msg;
8658         void *hdr;
8659
8660         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8661         if (!msg)
8662                 return -ENOMEM;
8663
8664         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8665         if (!hdr) {
8666                 nlmsg_free(msg);
8667                 return -ENOMEM;
8668         }
8669
8670         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8671             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8672                                         netdev->ifindex)) ||
8673             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8674             (sig_dbm &&
8675              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8676             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8677                 goto nla_put_failure;
8678
8679         genlmsg_end(msg, hdr);
8680
8681         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8682
8683  nla_put_failure:
8684         genlmsg_cancel(msg, hdr);
8685         nlmsg_free(msg);
8686         return -ENOBUFS;
8687 }
8688
8689 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8690                                  struct wireless_dev *wdev, u64 cookie,
8691                                  const u8 *buf, size_t len, bool ack,
8692                                  gfp_t gfp)
8693 {
8694         struct net_device *netdev = wdev->netdev;
8695         struct sk_buff *msg;
8696         void *hdr;
8697
8698         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8699         if (!msg)
8700                 return;
8701
8702         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8703         if (!hdr) {
8704                 nlmsg_free(msg);
8705                 return;
8706         }
8707
8708         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8709             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8710                                    netdev->ifindex)) ||
8711             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8712             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8713             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8714                 goto nla_put_failure;
8715
8716         genlmsg_end(msg, hdr);
8717
8718         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8719         return;
8720
8721  nla_put_failure:
8722         genlmsg_cancel(msg, hdr);
8723         nlmsg_free(msg);
8724 }
8725
8726 void
8727 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8728                              struct net_device *netdev,
8729                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8730                              gfp_t gfp)
8731 {
8732         struct sk_buff *msg;
8733         struct nlattr *pinfoattr;
8734         void *hdr;
8735
8736         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8737         if (!msg)
8738                 return;
8739
8740         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8741         if (!hdr) {
8742                 nlmsg_free(msg);
8743                 return;
8744         }
8745
8746         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8747             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8748                 goto nla_put_failure;
8749
8750         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8751         if (!pinfoattr)
8752                 goto nla_put_failure;
8753
8754         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8755                         rssi_event))
8756                 goto nla_put_failure;
8757
8758         nla_nest_end(msg, pinfoattr);
8759
8760         genlmsg_end(msg, hdr);
8761
8762         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8763                                 nl80211_mlme_mcgrp.id, gfp);
8764         return;
8765
8766  nla_put_failure:
8767         genlmsg_cancel(msg, hdr);
8768         nlmsg_free(msg);
8769 }
8770
8771 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8772                               struct net_device *netdev, const u8 *bssid,
8773                               const u8 *replay_ctr, gfp_t gfp)
8774 {
8775         struct sk_buff *msg;
8776         struct nlattr *rekey_attr;
8777         void *hdr;
8778
8779         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8780         if (!msg)
8781                 return;
8782
8783         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8784         if (!hdr) {
8785                 nlmsg_free(msg);
8786                 return;
8787         }
8788
8789         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8790             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8791             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8792                 goto nla_put_failure;
8793
8794         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8795         if (!rekey_attr)
8796                 goto nla_put_failure;
8797
8798         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8799                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8800                 goto nla_put_failure;
8801
8802         nla_nest_end(msg, rekey_attr);
8803
8804         genlmsg_end(msg, hdr);
8805
8806         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8807                                 nl80211_mlme_mcgrp.id, gfp);
8808         return;
8809
8810  nla_put_failure:
8811         genlmsg_cancel(msg, hdr);
8812         nlmsg_free(msg);
8813 }
8814
8815 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8816                                     struct net_device *netdev, int index,
8817                                     const u8 *bssid, bool preauth, gfp_t gfp)
8818 {
8819         struct sk_buff *msg;
8820         struct nlattr *attr;
8821         void *hdr;
8822
8823         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8824         if (!msg)
8825                 return;
8826
8827         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8828         if (!hdr) {
8829                 nlmsg_free(msg);
8830                 return;
8831         }
8832
8833         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8834             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8835                 goto nla_put_failure;
8836
8837         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8838         if (!attr)
8839                 goto nla_put_failure;
8840
8841         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8842             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8843             (preauth &&
8844              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8845                 goto nla_put_failure;
8846
8847         nla_nest_end(msg, attr);
8848
8849         genlmsg_end(msg, hdr);
8850
8851         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8852                                 nl80211_mlme_mcgrp.id, gfp);
8853         return;
8854
8855  nla_put_failure:
8856         genlmsg_cancel(msg, hdr);
8857         nlmsg_free(msg);
8858 }
8859
8860 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8861                               struct net_device *netdev,
8862                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8863 {
8864         struct sk_buff *msg;
8865         void *hdr;
8866
8867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8868         if (!msg)
8869                 return;
8870
8871         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8872         if (!hdr) {
8873                 nlmsg_free(msg);
8874                 return;
8875         }
8876
8877         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8878                 goto nla_put_failure;
8879
8880         if (nl80211_send_chandef(msg, chandef))
8881                 goto nla_put_failure;
8882
8883         genlmsg_end(msg, hdr);
8884
8885         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8886                                 nl80211_mlme_mcgrp.id, gfp);
8887         return;
8888
8889  nla_put_failure:
8890         genlmsg_cancel(msg, hdr);
8891         nlmsg_free(msg);
8892 }
8893
8894 void
8895 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8896                             struct net_device *netdev, const u8 *peer,
8897                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8898 {
8899         struct sk_buff *msg;
8900         struct nlattr *pinfoattr;
8901         void *hdr;
8902
8903         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8904         if (!msg)
8905                 return;
8906
8907         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8908         if (!hdr) {
8909                 nlmsg_free(msg);
8910                 return;
8911         }
8912
8913         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8914             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8915             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8916                 goto nla_put_failure;
8917
8918         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8919         if (!pinfoattr)
8920                 goto nla_put_failure;
8921
8922         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8923                 goto nla_put_failure;
8924
8925         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8926                 goto nla_put_failure;
8927
8928         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
8929                 goto nla_put_failure;
8930
8931         nla_nest_end(msg, pinfoattr);
8932
8933         genlmsg_end(msg, hdr);
8934
8935         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8936                                 nl80211_mlme_mcgrp.id, gfp);
8937         return;
8938
8939  nla_put_failure:
8940         genlmsg_cancel(msg, hdr);
8941         nlmsg_free(msg);
8942 }
8943
8944 void
8945 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8946                                 struct net_device *netdev, const u8 *peer,
8947                                 u32 num_packets, gfp_t gfp)
8948 {
8949         struct sk_buff *msg;
8950         struct nlattr *pinfoattr;
8951         void *hdr;
8952
8953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8954         if (!msg)
8955                 return;
8956
8957         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8958         if (!hdr) {
8959                 nlmsg_free(msg);
8960                 return;
8961         }
8962
8963         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8964             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8965             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8966                 goto nla_put_failure;
8967
8968         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8969         if (!pinfoattr)
8970                 goto nla_put_failure;
8971
8972         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8973                 goto nla_put_failure;
8974
8975         nla_nest_end(msg, pinfoattr);
8976
8977         genlmsg_end(msg, hdr);
8978
8979         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8980                                 nl80211_mlme_mcgrp.id, gfp);
8981         return;
8982
8983  nla_put_failure:
8984         genlmsg_cancel(msg, hdr);
8985         nlmsg_free(msg);
8986 }
8987
8988 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8989                            u64 cookie, bool acked, gfp_t gfp)
8990 {
8991         struct wireless_dev *wdev = dev->ieee80211_ptr;
8992         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8993         struct sk_buff *msg;
8994         void *hdr;
8995         int err;
8996
8997         trace_cfg80211_probe_status(dev, addr, cookie, acked);
8998
8999         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9000
9001         if (!msg)
9002                 return;
9003
9004         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9005         if (!hdr) {
9006                 nlmsg_free(msg);
9007                 return;
9008         }
9009
9010         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9011             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9012             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9013             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9014             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9015                 goto nla_put_failure;
9016
9017         err = genlmsg_end(msg, hdr);
9018         if (err < 0) {
9019                 nlmsg_free(msg);
9020                 return;
9021         }
9022
9023         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9024                                 nl80211_mlme_mcgrp.id, gfp);
9025         return;
9026
9027  nla_put_failure:
9028         genlmsg_cancel(msg, hdr);
9029         nlmsg_free(msg);
9030 }
9031 EXPORT_SYMBOL(cfg80211_probe_status);
9032
9033 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9034                                  const u8 *frame, size_t len,
9035                                  int freq, int sig_dbm)
9036 {
9037         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9038         struct sk_buff *msg;
9039         void *hdr;
9040         struct cfg80211_beacon_registration *reg;
9041
9042         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9043
9044         spin_lock_bh(&rdev->beacon_registrations_lock);
9045         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9046                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9047                 if (!msg) {
9048                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9049                         return;
9050                 }
9051
9052                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9053                 if (!hdr)
9054                         goto nla_put_failure;
9055
9056                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9057                     (freq &&
9058                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9059                     (sig_dbm &&
9060                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9061                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9062                         goto nla_put_failure;
9063
9064                 genlmsg_end(msg, hdr);
9065
9066                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9067         }
9068         spin_unlock_bh(&rdev->beacon_registrations_lock);
9069         return;
9070
9071  nla_put_failure:
9072         spin_unlock_bh(&rdev->beacon_registrations_lock);
9073         if (hdr)
9074                 genlmsg_cancel(msg, hdr);
9075         nlmsg_free(msg);
9076 }
9077 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9078
9079 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9080                                 enum nl80211_tdls_operation oper,
9081                                 u16 reason_code, gfp_t gfp)
9082 {
9083         struct wireless_dev *wdev = dev->ieee80211_ptr;
9084         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9085         struct sk_buff *msg;
9086         void *hdr;
9087         int err;
9088
9089         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9090                                          reason_code);
9091
9092         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9093         if (!msg)
9094                 return;
9095
9096         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9097         if (!hdr) {
9098                 nlmsg_free(msg);
9099                 return;
9100         }
9101
9102         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9103             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9104             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9105             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9106             (reason_code > 0 &&
9107              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9108                 goto nla_put_failure;
9109
9110         err = genlmsg_end(msg, hdr);
9111         if (err < 0) {
9112                 nlmsg_free(msg);
9113                 return;
9114         }
9115
9116         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9117                                 nl80211_mlme_mcgrp.id, gfp);
9118         return;
9119
9120  nla_put_failure:
9121         genlmsg_cancel(msg, hdr);
9122         nlmsg_free(msg);
9123 }
9124 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9125
9126 static int nl80211_netlink_notify(struct notifier_block * nb,
9127                                   unsigned long state,
9128                                   void *_notify)
9129 {
9130         struct netlink_notify *notify = _notify;
9131         struct cfg80211_registered_device *rdev;
9132         struct wireless_dev *wdev;
9133         struct cfg80211_beacon_registration *reg, *tmp;
9134
9135         if (state != NETLINK_URELEASE)
9136                 return NOTIFY_DONE;
9137
9138         rcu_read_lock();
9139
9140         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9141                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9142                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9143
9144                 spin_lock_bh(&rdev->beacon_registrations_lock);
9145                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9146                                          list) {
9147                         if (reg->nlportid == notify->portid) {
9148                                 list_del(&reg->list);
9149                                 kfree(reg);
9150                                 break;
9151                         }
9152                 }
9153                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9154         }
9155
9156         rcu_read_unlock();
9157
9158         return NOTIFY_DONE;
9159 }
9160
9161 static struct notifier_block nl80211_netlink_notifier = {
9162         .notifier_call = nl80211_netlink_notify,
9163 };
9164
9165 /* initialisation/exit functions */
9166
9167 int nl80211_init(void)
9168 {
9169         int err;
9170
9171         err = genl_register_family_with_ops(&nl80211_fam,
9172                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9173         if (err)
9174                 return err;
9175
9176         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9177         if (err)
9178                 goto err_out;
9179
9180         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9181         if (err)
9182                 goto err_out;
9183
9184         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9185         if (err)
9186                 goto err_out;
9187
9188         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9189         if (err)
9190                 goto err_out;
9191
9192 #ifdef CONFIG_NL80211_TESTMODE
9193         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9194         if (err)
9195                 goto err_out;
9196 #endif
9197
9198         err = netlink_register_notifier(&nl80211_netlink_notifier);
9199         if (err)
9200                 goto err_out;
9201
9202         return 0;
9203  err_out:
9204         genl_unregister_family(&nl80211_fam);
9205         return err;
9206 }
9207
9208 void nl80211_exit(void)
9209 {
9210         netlink_unregister_notifier(&nl80211_netlink_notifier);
9211         genl_unregister_family(&nl80211_fam);
9212 }