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

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  41         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  42         .hdrsize = 0,                   /* no private header */
  43         .version = 1,                   /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         ASSERT_RTNL();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 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
  95                 if (result)
  96                         break;
  97         }
  98
  99         if (result)
 100                 return result;
 101         return ERR_PTR(-ENODEV);
 102 }
 103
 104 static struct cfg80211_registered_device *
 105 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 106 {
 107         struct cfg80211_registered_device *rdev = NULL, *tmp;
 108         struct net_device *netdev;
 109
 110         ASSERT_RTNL();
 111
 112         if (!attrs[NL80211_ATTR_WIPHY] &&
 113             !attrs[NL80211_ATTR_IFINDEX] &&
 114             !attrs[NL80211_ATTR_WDEV])
 115                 return ERR_PTR(-EINVAL);
 116
 117         if (attrs[NL80211_ATTR_WIPHY])
 118                 rdev = cfg80211_rdev_by_wiphy_idx(
 119                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 120
 121         if (attrs[NL80211_ATTR_WDEV]) {
 122                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 123                 struct wireless_dev *wdev;
 124                 bool found = false;
 125
 126                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 127                 if (tmp) {
 128                         /* make sure wdev exists */
 129                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 130                                 if (wdev->identifier != (u32)wdev_id)
 131                                         continue;
 132                                 found = true;
 133                                 break;
 134                         }
 135
 136                         if (!found)
 137                                 tmp = NULL;
 138
 139                         if (rdev && tmp != rdev)
 140                                 return ERR_PTR(-EINVAL);
 141                         rdev = tmp;
 142                 }
 143         }
 144
 145         if (attrs[NL80211_ATTR_IFINDEX]) {
 146                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 147                 netdev = dev_get_by_index(netns, ifindex);
 148                 if (netdev) {
 149                         if (netdev->ieee80211_ptr)
 150                                 tmp = wiphy_to_dev(
 151                                                 netdev->ieee80211_ptr->wiphy);
 152                         else
 153                                 tmp = NULL;
 154
 155                         dev_put(netdev);
 156
 157                         /* not wireless device -- return error */
 158                         if (!tmp)
 159                                 return ERR_PTR(-EINVAL);
 160
 161                         /* mismatch -- return error */
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (!rdev)
 170                 return ERR_PTR(-ENODEV);
 171
 172         if (netns != wiphy_net(&rdev->wiphy))
 173                 return ERR_PTR(-ENODEV);
 174
 175         return rdev;
 176 }
 177
 178 /*
 179  * This function returns a pointer to the driver
 180  * that the genl_info item that is passed refers to.
 181  *
 182  * The result of this can be a PTR_ERR and hence must
 183  * be checked with IS_ERR() for errors.
 184  */
 185 static struct cfg80211_registered_device *
 186 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 187 {
 188         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 189 }
 190
 191 /* policy for the attributes */
 192 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 193         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 194         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 195                                       .len = 20-1 },
 196         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 197
 198         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 199         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 200         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 201         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 202         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 203
 204         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 205         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 206         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 207         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 208         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 209
 210         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 212         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 213
 214         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 215         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 216
 217         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 218         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 219                                     .len = WLAN_MAX_KEY_LEN },
 220         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 221         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 222         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 223         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 224         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 227         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 229                                        .len = IEEE80211_MAX_DATA_LEN },
 230         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 231                                        .len = IEEE80211_MAX_DATA_LEN },
 232         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 233         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 234         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 235         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 236                                                .len = NL80211_MAX_SUPP_RATES },
 237         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 238         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 239         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 240         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 241                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 242         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 243
 244         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 245         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 246
 247         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 248         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 249         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 250         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 251                                            .len = NL80211_MAX_SUPP_RATES },
 252         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 253
 254         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 256
 257         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 258
 259         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 261                               .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 264
 265         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 266                                 .len = IEEE80211_MAX_SSID_LEN },
 267         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 269         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 270         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 271         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 272         [NL80211_ATTR_STA_FLAGS2] = {
 273                 .len = sizeof(struct nl80211_sta_flag_update),
 274         },
 275         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 277         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 280         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 281         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 282         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 283         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 284                                  .len = WLAN_PMKID_LEN },
 285         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 286         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 287         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 288         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 289                                  .len = IEEE80211_MAX_DATA_LEN },
 290         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 291         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 293         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 295         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 296         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 297         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 300         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 301         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 303         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 304         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 306         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 308         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 309         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 310                                          .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 312                                          .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 317         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 318         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 319         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 320         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 322         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 323                                       .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 325         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 327                 .len = NL80211_HT_CAPABILITY_LEN
 328         },
 329         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 330         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 331         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 332         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 333         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 334         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 335         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 336         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 337         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 338         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 339         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 340         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 341         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 342         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 343         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 344         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 346                 .len = NL80211_VHT_CAPABILITY_LEN,
 347         },
 348         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 349         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 350                                   .len = IEEE80211_MAX_DATA_LEN },
 351         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 352         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 353         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 354         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 355         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
 356         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
 357         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 358         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 359         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 360         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 361 };
 362
 363 /* policy for the key attributes */
 364 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 365         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 366         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 367         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 368         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 369         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 370         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 371         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 372         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 373 };
 374
 375 /* policy for the key default flags */
 376 static const struct nla_policy
 377 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 378         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 379         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 380 };
 381
 382 /* policy for WoWLAN attributes */
 383 static const struct nla_policy
 384 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 385         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 386         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 387         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 388         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 389         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 390         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 391         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 392         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 394 };
 395
 396 static const struct nla_policy
 397 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 398         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 399         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 400         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 401         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 402         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 403         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 404         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 405                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 406         },
 407         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 408                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 409         },
 410         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 411         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 412         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 413 };
 414
 415 /* policy for coalesce rule attributes */
 416 static const struct nla_policy
 417 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 418         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 419         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 420         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 421 };
 422
 423 /* policy for GTK rekey offload attributes */
 424 static const struct nla_policy
 425 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 426         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 427         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 428         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 429 };
 430
 431 static const struct nla_policy
 432 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 433         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 434                                                  .len = IEEE80211_MAX_SSID_LEN },
 435         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 436 };
 437
 438 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 439                                      struct netlink_callback *cb,
 440                                      struct cfg80211_registered_device **rdev,
 441                                      struct wireless_dev **wdev)
 442 {
 443         int err;
 444
 445         rtnl_lock();
 446
 447         if (!cb->args[0]) {
 448                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 449                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 450                                   nl80211_policy);
 451                 if (err)
 452                         goto out_unlock;
 453
 454                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 455                                                    nl80211_fam.attrbuf);
 456                 if (IS_ERR(*wdev)) {
 457                         err = PTR_ERR(*wdev);
 458                         goto out_unlock;
 459                 }
 460                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 461                 /* 0 is the first index - add 1 to parse only once */
 462                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 463                 cb->args[1] = (*wdev)->identifier;
 464         } else {
 465                 /* subtract the 1 again here */
 466                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 467                 struct wireless_dev *tmp;
 468
 469                 if (!wiphy) {
 470                         err = -ENODEV;
 471                         goto out_unlock;
 472                 }
 473                 *rdev = wiphy_to_dev(wiphy);
 474                 *wdev = NULL;
 475
 476                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 477                         if (tmp->identifier == cb->args[1]) {
 478                                 *wdev = tmp;
 479                                 break;
 480                         }
 481                 }
 482
 483                 if (!*wdev) {
 484                         err = -ENODEV;
 485                         goto out_unlock;
 486                 }
 487         }
 488
 489         return 0;
 490  out_unlock:
 491         rtnl_unlock();
 492         return err;
 493 }
 494
 495 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 496 {
 497         rtnl_unlock();
 498 }
 499
 500 /* IE validation */
 501 static bool is_valid_ie_attr(const struct nlattr *attr)
 502 {
 503         const u8 *pos;
 504         int len;
 505
 506         if (!attr)
 507                 return true;
 508
 509         pos = nla_data(attr);
 510         len = nla_len(attr);
 511
 512         while (len) {
 513                 u8 elemlen;
 514
 515                 if (len < 2)
 516                         return false;
 517                 len -= 2;
 518
 519                 elemlen = pos[1];
 520                 if (elemlen > len)
 521                         return false;
 522
 523                 len -= elemlen;
 524                 pos += 2 + elemlen;
 525         }
 526
 527         return true;
 528 }
 529
 530 /* message building helper */
 531 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 532                                    int flags, u8 cmd)
 533 {
 534         /* since there is no private header just add the generic one */
 535         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 536 }
 537
 538 static int nl80211_msg_put_channel(struct sk_buff *msg,
 539                                    struct ieee80211_channel *chan,
 540                                    bool large)
 541 {
 542         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 543                         chan->center_freq))
 544                 goto nla_put_failure;
 545
 546         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 547             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 548                 goto nla_put_failure;
 549         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 550                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 551                         goto nla_put_failure;
 552                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 553                         goto nla_put_failure;
 554         }
 555         if (chan->flags & IEEE80211_CHAN_RADAR) {
 556                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 557                         goto nla_put_failure;
 558                 if (large) {
 559                         u32 time;
 560
 561                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 562
 563                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 564                                         chan->dfs_state))
 565                                 goto nla_put_failure;
 566                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 567                                         time))
 568                                 goto nla_put_failure;
 569                 }
 570         }
 571
 572         if (large) {
 573                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 574                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 575                         goto nla_put_failure;
 576                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 577                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 578                         goto nla_put_failure;
 579                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 580                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 581                         goto nla_put_failure;
 582                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 583                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 584                         goto nla_put_failure;
 585         }
 586
 587         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 588                         DBM_TO_MBM(chan->max_power)))
 589                 goto nla_put_failure;
 590
 591         return 0;
 592
 593  nla_put_failure:
 594         return -ENOBUFS;
 595 }
 596
 597 /* netlink command implementations */
 598
 599 struct key_parse {
 600         struct key_params p;
 601         int idx;
 602         int type;
 603         bool def, defmgmt;
 604         bool def_uni, def_multi;
 605 };
 606
 607 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 608 {
 609         struct nlattr *tb[NL80211_KEY_MAX + 1];
 610         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 611                                    nl80211_key_policy);
 612         if (err)
 613                 return err;
 614
 615         k->def = !!tb[NL80211_KEY_DEFAULT];
 616         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 617
 618         if (k->def) {
 619                 k->def_uni = true;
 620                 k->def_multi = true;
 621         }
 622         if (k->defmgmt)
 623                 k->def_multi = true;
 624
 625         if (tb[NL80211_KEY_IDX])
 626                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 627
 628         if (tb[NL80211_KEY_DATA]) {
 629                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 630                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 631         }
 632
 633         if (tb[NL80211_KEY_SEQ]) {
 634                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 635                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 636         }
 637
 638         if (tb[NL80211_KEY_CIPHER])
 639                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 640
 641         if (tb[NL80211_KEY_TYPE]) {
 642                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 643                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 644                         return -EINVAL;
 645         }
 646
 647         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 648                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 649                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 650                                        tb[NL80211_KEY_DEFAULT_TYPES],
 651                                        nl80211_key_default_policy);
 652                 if (err)
 653                         return err;
 654
 655                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 656                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 657         }
 658
 659         return 0;
 660 }
 661
 662 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 663 {
 664         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 665                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 666                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 667         }
 668
 669         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 670                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 671                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 672         }
 673
 674         if (info->attrs[NL80211_ATTR_KEY_IDX])
 675                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 676
 677         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 678                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 679
 680         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 681         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 682
 683         if (k->def) {
 684                 k->def_uni = true;
 685                 k->def_multi = true;
 686         }
 687         if (k->defmgmt)
 688                 k->def_multi = true;
 689
 690         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 691                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 692                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 693                         return -EINVAL;
 694         }
 695
 696         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 697                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 698                 int err = nla_parse_nested(
 699                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 700                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 701                                 nl80211_key_default_policy);
 702                 if (err)
 703                         return err;
 704
 705                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 706                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 707         }
 708
 709         return 0;
 710 }
 711
 712 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 713 {
 714         int err;
 715
 716         memset(k, 0, sizeof(*k));
 717         k->idx = -1;
 718         k->type = -1;
 719
 720         if (info->attrs[NL80211_ATTR_KEY])
 721                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 722         else
 723                 err = nl80211_parse_key_old(info, k);
 724
 725         if (err)
 726                 return err;
 727
 728         if (k->def && k->defmgmt)
 729                 return -EINVAL;
 730
 731         if (k->defmgmt) {
 732                 if (k->def_uni || !k->def_multi)
 733                         return -EINVAL;
 734         }
 735
 736         if (k->idx != -1) {
 737                 if (k->defmgmt) {
 738                         if (k->idx < 4 || k->idx > 5)
 739                                 return -EINVAL;
 740                 } else if (k->def) {
 741                         if (k->idx < 0 || k->idx > 3)
 742                                 return -EINVAL;
 743                 } else {
 744                         if (k->idx < 0 || k->idx > 5)
 745                                 return -EINVAL;
 746                 }
 747         }
 748
 749         return 0;
 750 }
 751
 752 static struct cfg80211_cached_keys *
 753 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 754                        struct nlattr *keys, bool *no_ht)
 755 {
 756         struct key_parse parse;
 757         struct nlattr *key;
 758         struct cfg80211_cached_keys *result;
 759         int rem, err, def = 0;
 760
 761         result = kzalloc(sizeof(*result), GFP_KERNEL);
 762         if (!result)
 763                 return ERR_PTR(-ENOMEM);
 764
 765         result->def = -1;
 766         result->defmgmt = -1;
 767
 768         nla_for_each_nested(key, keys, rem) {
 769                 memset(&parse, 0, sizeof(parse));
 770                 parse.idx = -1;
 771
 772                 err = nl80211_parse_key_new(key, &parse);
 773                 if (err)
 774                         goto error;
 775                 err = -EINVAL;
 776                 if (!parse.p.key)
 777                         goto error;
 778                 if (parse.idx < 0 || parse.idx > 4)
 779                         goto error;
 780                 if (parse.def) {
 781                         if (def)
 782                                 goto error;
 783                         def = 1;
 784                         result->def = parse.idx;
 785                         if (!parse.def_uni || !parse.def_multi)
 786                                 goto error;
 787                 } else if (parse.defmgmt)
 788                         goto error;
 789                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 790                                                      parse.idx, false, NULL);
 791                 if (err)
 792                         goto error;
 793                 result->params[parse.idx].cipher = parse.p.cipher;
 794                 result->params[parse.idx].key_len = parse.p.key_len;
 795                 result->params[parse.idx].key = result->data[parse.idx];
 796                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 797
 798                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 799                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 800                         if (no_ht)
 801                                 *no_ht = true;
 802                 }
 803         }
 804
 805         return result;
 806  error:
 807         kfree(result);
 808         return ERR_PTR(err);
 809 }
 810
 811 static int nl80211_key_allowed(struct wireless_dev *wdev)
 812 {
 813         ASSERT_WDEV_LOCK(wdev);
 814
 815         switch (wdev->iftype) {
 816         case NL80211_IFTYPE_AP:
 817         case NL80211_IFTYPE_AP_VLAN:
 818         case NL80211_IFTYPE_P2P_GO:
 819         case NL80211_IFTYPE_MESH_POINT:
 820                 break;
 821         case NL80211_IFTYPE_ADHOC:
 822         case NL80211_IFTYPE_STATION:
 823         case NL80211_IFTYPE_P2P_CLIENT:
 824                 if (!wdev->current_bss)
 825                         return -ENOLINK;
 826                 break;
 827         default:
 828                 return -EINVAL;
 829         }
 830
 831         return 0;
 832 }
 833
 834 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 835 {
 836         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 837         int i;
 838
 839         if (!nl_modes)
 840                 goto nla_put_failure;
 841
 842         i = 0;
 843         while (ifmodes) {
 844                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 845                         goto nla_put_failure;
 846                 ifmodes >>= 1;
 847                 i++;
 848         }
 849
 850         nla_nest_end(msg, nl_modes);
 851         return 0;
 852
 853 nla_put_failure:
 854         return -ENOBUFS;
 855 }
 856
 857 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 858                                           struct sk_buff *msg,
 859                                           bool large)
 860 {
 861         struct nlattr *nl_combis;
 862         int i, j;
 863
 864         nl_combis = nla_nest_start(msg,
 865                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 866         if (!nl_combis)
 867                 goto nla_put_failure;
 868
 869         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 870                 const struct ieee80211_iface_combination *c;
 871                 struct nlattr *nl_combi, *nl_limits;
 872
 873                 c = &wiphy->iface_combinations[i];
 874
 875                 nl_combi = nla_nest_start(msg, i + 1);
 876                 if (!nl_combi)
 877                         goto nla_put_failure;
 878
 879                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 880                 if (!nl_limits)
 881                         goto nla_put_failure;
 882
 883                 for (j = 0; j < c->n_limits; j++) {
 884                         struct nlattr *nl_limit;
 885
 886                         nl_limit = nla_nest_start(msg, j + 1);
 887                         if (!nl_limit)
 888                                 goto nla_put_failure;
 889                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 890                                         c->limits[j].max))
 891                                 goto nla_put_failure;
 892                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 893                                                 c->limits[j].types))
 894                                 goto nla_put_failure;
 895                         nla_nest_end(msg, nl_limit);
 896                 }
 897
 898                 nla_nest_end(msg, nl_limits);
 899
 900                 if (c->beacon_int_infra_match &&
 901                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 902                         goto nla_put_failure;
 903                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 904                                 c->num_different_channels) ||
 905                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 906                                 c->max_interfaces))
 907                         goto nla_put_failure;
 908                 if (large &&
 909                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 910                                 c->radar_detect_widths))
 911                         goto nla_put_failure;
 912
 913                 nla_nest_end(msg, nl_combi);
 914         }
 915
 916         nla_nest_end(msg, nl_combis);
 917
 918         return 0;
 919 nla_put_failure:
 920         return -ENOBUFS;
 921 }
 922
 923 #ifdef CONFIG_PM
 924 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 925                                         struct sk_buff *msg)
 926 {
 927         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 928         struct nlattr *nl_tcp;
 929
 930         if (!tcp)
 931                 return 0;
 932
 933         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 934         if (!nl_tcp)
 935                 return -ENOBUFS;
 936
 937         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 938                         tcp->data_payload_max))
 939                 return -ENOBUFS;
 940
 941         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 942                         tcp->data_payload_max))
 943                 return -ENOBUFS;
 944
 945         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 946                 return -ENOBUFS;
 947
 948         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 949                                 sizeof(*tcp->tok), tcp->tok))
 950                 return -ENOBUFS;
 951
 952         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 953                         tcp->data_interval_max))
 954                 return -ENOBUFS;
 955
 956         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 957                         tcp->wake_payload_max))
 958                 return -ENOBUFS;
 959
 960         nla_nest_end(msg, nl_tcp);
 961         return 0;
 962 }
 963
 964 static int nl80211_send_wowlan(struct sk_buff *msg,
 965                                struct cfg80211_registered_device *dev,
 966                                bool large)
 967 {
 968         struct nlattr *nl_wowlan;
 969
 970         if (!dev->wiphy.wowlan)
 971                 return 0;
 972
 973         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 974         if (!nl_wowlan)
 975                 return -ENOBUFS;
 976
 977         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 978              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 979             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 980              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 981             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 982              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 983             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 984              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 985             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 986              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 987             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 988              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 989             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 990              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 991             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 992              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 993                 return -ENOBUFS;
 994
 995         if (dev->wiphy.wowlan->n_patterns) {
 996                 struct nl80211_pattern_support pat = {
 997                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 998                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 999                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
1000                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
1001                 };
1002
1003                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1004                             sizeof(pat), &pat))
1005                         return -ENOBUFS;
1006         }
1007
1008         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1009                 return -ENOBUFS;
1010
1011         nla_nest_end(msg, nl_wowlan);
1012
1013         return 0;
1014 }
1015 #endif
1016
1017 static int nl80211_send_coalesce(struct sk_buff *msg,
1018                                  struct cfg80211_registered_device *dev)
1019 {
1020         struct nl80211_coalesce_rule_support rule;
1021
1022         if (!dev->wiphy.coalesce)
1023                 return 0;
1024
1025         rule.max_rules = dev->wiphy.coalesce->n_rules;
1026         rule.max_delay = dev->wiphy.coalesce->max_delay;
1027         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1028         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1029         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1030         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1031
1032         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1033                 return -ENOBUFS;
1034
1035         return 0;
1036 }
1037
1038 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1039                                       struct ieee80211_supported_band *sband)
1040 {
1041         struct nlattr *nl_rates, *nl_rate;
1042         struct ieee80211_rate *rate;
1043         int i;
1044
1045         /* add HT info */
1046         if (sband->ht_cap.ht_supported &&
1047             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1048                      sizeof(sband->ht_cap.mcs),
1049                      &sband->ht_cap.mcs) ||
1050              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1051                          sband->ht_cap.cap) ||
1052              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1053                         sband->ht_cap.ampdu_factor) ||
1054              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1055                         sband->ht_cap.ampdu_density)))
1056                 return -ENOBUFS;
1057
1058         /* add VHT info */
1059         if (sband->vht_cap.vht_supported &&
1060             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1061                      sizeof(sband->vht_cap.vht_mcs),
1062                      &sband->vht_cap.vht_mcs) ||
1063              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1064                          sband->vht_cap.cap)))
1065                 return -ENOBUFS;
1066
1067         /* add bitrates */
1068         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1069         if (!nl_rates)
1070                 return -ENOBUFS;
1071
1072         for (i = 0; i < sband->n_bitrates; i++) {
1073                 nl_rate = nla_nest_start(msg, i);
1074                 if (!nl_rate)
1075                         return -ENOBUFS;
1076
1077                 rate = &sband->bitrates[i];
1078                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1079                                 rate->bitrate))
1080                         return -ENOBUFS;
1081                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1082                     nla_put_flag(msg,
1083                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1084                         return -ENOBUFS;
1085
1086                 nla_nest_end(msg, nl_rate);
1087         }
1088
1089         nla_nest_end(msg, nl_rates);
1090
1091         return 0;
1092 }
1093
1094 static int
1095 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1096                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1097 {
1098         u16 stypes;
1099         struct nlattr *nl_ftypes, *nl_ifs;
1100         enum nl80211_iftype ift;
1101         int i;
1102
1103         if (!mgmt_stypes)
1104                 return 0;
1105
1106         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1107         if (!nl_ifs)
1108                 return -ENOBUFS;
1109
1110         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1111                 nl_ftypes = nla_nest_start(msg, ift);
1112                 if (!nl_ftypes)
1113                         return -ENOBUFS;
1114                 i = 0;
1115                 stypes = mgmt_stypes[ift].tx;
1116                 while (stypes) {
1117                         if ((stypes & 1) &&
1118                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1119                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1120                                 return -ENOBUFS;
1121                         stypes >>= 1;
1122                         i++;
1123                 }
1124                 nla_nest_end(msg, nl_ftypes);
1125         }
1126
1127         nla_nest_end(msg, nl_ifs);
1128
1129         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1130         if (!nl_ifs)
1131                 return -ENOBUFS;
1132
1133         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1134                 nl_ftypes = nla_nest_start(msg, ift);
1135                 if (!nl_ftypes)
1136                         return -ENOBUFS;
1137                 i = 0;
1138                 stypes = mgmt_stypes[ift].rx;
1139                 while (stypes) {
1140                         if ((stypes & 1) &&
1141                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1142                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1143                                 return -ENOBUFS;
1144                         stypes >>= 1;
1145                         i++;
1146                 }
1147                 nla_nest_end(msg, nl_ftypes);
1148         }
1149         nla_nest_end(msg, nl_ifs);
1150
1151         return 0;
1152 }
1153
1154 struct nl80211_dump_wiphy_state {
1155         s64 filter_wiphy;
1156         long start;
1157         long split_start, band_start, chan_start;
1158         bool split;
1159 };
1160
1161 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1162                               struct sk_buff *msg, u32 portid, u32 seq,
1163                               int flags, struct nl80211_dump_wiphy_state *state)
1164 {
1165         void *hdr;
1166         struct nlattr *nl_bands, *nl_band;
1167         struct nlattr *nl_freqs, *nl_freq;
1168         struct nlattr *nl_cmds;
1169         enum ieee80211_band band;
1170         struct ieee80211_channel *chan;
1171         int i;
1172         const struct ieee80211_txrx_stypes *mgmt_stypes =
1173                                 dev->wiphy.mgmt_stypes;
1174         u32 features;
1175
1176         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1177         if (!hdr)
1178                 return -ENOBUFS;
1179
1180         if (WARN_ON(!state))
1181                 return -EINVAL;
1182
1183         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1184             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1185                            wiphy_name(&dev->wiphy)) ||
1186             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1187                         cfg80211_rdev_list_generation))
1188                 goto nla_put_failure;
1189
1190         switch (state->split_start) {
1191         case 0:
1192                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1193                                dev->wiphy.retry_short) ||
1194                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1195                                dev->wiphy.retry_long) ||
1196                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1197                                 dev->wiphy.frag_threshold) ||
1198                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1199                                 dev->wiphy.rts_threshold) ||
1200                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1201                                dev->wiphy.coverage_class) ||
1202                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1203                                dev->wiphy.max_scan_ssids) ||
1204                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1205                                dev->wiphy.max_sched_scan_ssids) ||
1206                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1207                                 dev->wiphy.max_scan_ie_len) ||
1208                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1209                                 dev->wiphy.max_sched_scan_ie_len) ||
1210                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1211                                dev->wiphy.max_match_sets))
1212                         goto nla_put_failure;
1213
1214                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1215                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1216                         goto nla_put_failure;
1217                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1218                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1219                         goto nla_put_failure;
1220                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1221                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1222                         goto nla_put_failure;
1223                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1224                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1225                         goto nla_put_failure;
1226                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1227                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1228                         goto nla_put_failure;
1229                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1230                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1231                         goto nla_put_failure;
1232                 state->split_start++;
1233                 if (state->split)
1234                         break;
1235         case 1:
1236                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1237                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1238                             dev->wiphy.cipher_suites))
1239                         goto nla_put_failure;
1240
1241                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1242                                dev->wiphy.max_num_pmkids))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1246                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1247                         goto nla_put_failure;
1248
1249                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1250                                 dev->wiphy.available_antennas_tx) ||
1251                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1252                                 dev->wiphy.available_antennas_rx))
1253                         goto nla_put_failure;
1254
1255                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1256                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1257                                 dev->wiphy.probe_resp_offload))
1258                         goto nla_put_failure;
1259
1260                 if ((dev->wiphy.available_antennas_tx ||
1261                      dev->wiphy.available_antennas_rx) &&
1262                     dev->ops->get_antenna) {
1263                         u32 tx_ant = 0, rx_ant = 0;
1264                         int res;
1265                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1266                         if (!res) {
1267                                 if (nla_put_u32(msg,
1268                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1269                                                 tx_ant) ||
1270                                     nla_put_u32(msg,
1271                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1272                                                 rx_ant))
1273                                         goto nla_put_failure;
1274                         }
1275                 }
1276
1277                 state->split_start++;
1278                 if (state->split)
1279                         break;
1280         case 2:
1281                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1282                                         dev->wiphy.interface_modes))
1283                                 goto nla_put_failure;
1284                 state->split_start++;
1285                 if (state->split)
1286                         break;
1287         case 3:
1288                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1289                 if (!nl_bands)
1290                         goto nla_put_failure;
1291
1292                 for (band = state->band_start;
1293                      band < IEEE80211_NUM_BANDS; band++) {
1294                         struct ieee80211_supported_band *sband;
1295
1296                         sband = dev->wiphy.bands[band];
1297
1298                         if (!sband)
1299                                 continue;
1300
1301                         nl_band = nla_nest_start(msg, band);
1302                         if (!nl_band)
1303                                 goto nla_put_failure;
1304
1305                         switch (state->chan_start) {
1306                         case 0:
1307                                 if (nl80211_send_band_rateinfo(msg, sband))
1308                                         goto nla_put_failure;
1309                                 state->chan_start++;
1310                                 if (state->split)
1311                                         break;
1312                         default:
1313                                 /* add frequencies */
1314                                 nl_freqs = nla_nest_start(
1315                                         msg, NL80211_BAND_ATTR_FREQS);
1316                                 if (!nl_freqs)
1317                                         goto nla_put_failure;
1318
1319                                 for (i = state->chan_start - 1;
1320                                      i < sband->n_channels;
1321                                      i++) {
1322                                         nl_freq = nla_nest_start(msg, i);
1323                                         if (!nl_freq)
1324                                                 goto nla_put_failure;
1325
1326                                         chan = &sband->channels[i];
1327
1328                                         if (nl80211_msg_put_channel(
1329                                                         msg, chan,
1330                                                         state->split))
1331                                                 goto nla_put_failure;
1332
1333                                         nla_nest_end(msg, nl_freq);
1334                                         if (state->split)
1335                                                 break;
1336                                 }
1337                                 if (i < sband->n_channels)
1338                                         state->chan_start = i + 2;
1339                                 else
1340                                         state->chan_start = 0;
1341                                 nla_nest_end(msg, nl_freqs);
1342                         }
1343
1344                         nla_nest_end(msg, nl_band);
1345
1346                         if (state->split) {
1347                                 /* start again here */
1348                                 if (state->chan_start)
1349                                         band--;
1350                                 break;
1351                         }
1352                 }
1353                 nla_nest_end(msg, nl_bands);
1354
1355                 if (band < IEEE80211_NUM_BANDS)
1356                         state->band_start = band + 1;
1357                 else
1358                         state->band_start = 0;
1359
1360                 /* if bands & channels are done, continue outside */
1361                 if (state->band_start == 0 && state->chan_start == 0)
1362                         state->split_start++;
1363                 if (state->split)
1364                         break;
1365         case 4:
1366                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1367                 if (!nl_cmds)
1368                         goto nla_put_failure;
1369
1370                 i = 0;
1371 #define CMD(op, n)                                                      \
1372                  do {                                                   \
1373                         if (dev->ops->op) {                             \
1374                                 i++;                                    \
1375                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1376                                         goto nla_put_failure;           \
1377                         }                                               \
1378                 } while (0)
1379
1380                 CMD(add_virtual_intf, NEW_INTERFACE);
1381                 CMD(change_virtual_intf, SET_INTERFACE);
1382                 CMD(add_key, NEW_KEY);
1383                 CMD(start_ap, START_AP);
1384                 CMD(add_station, NEW_STATION);
1385                 CMD(add_mpath, NEW_MPATH);
1386                 CMD(update_mesh_config, SET_MESH_CONFIG);
1387                 CMD(change_bss, SET_BSS);
1388                 CMD(auth, AUTHENTICATE);
1389                 CMD(assoc, ASSOCIATE);
1390                 CMD(deauth, DEAUTHENTICATE);
1391                 CMD(disassoc, DISASSOCIATE);
1392                 CMD(join_ibss, JOIN_IBSS);
1393                 CMD(join_mesh, JOIN_MESH);
1394                 CMD(set_pmksa, SET_PMKSA);
1395                 CMD(del_pmksa, DEL_PMKSA);
1396                 CMD(flush_pmksa, FLUSH_PMKSA);
1397                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1398                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1399                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1400                 CMD(mgmt_tx, FRAME);
1401                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1402                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1403                         i++;
1404                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1405                                 goto nla_put_failure;
1406                 }
1407                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1408                     dev->ops->join_mesh) {
1409                         i++;
1410                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1411                                 goto nla_put_failure;
1412                 }
1413                 CMD(set_wds_peer, SET_WDS_PEER);
1414                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1415                         CMD(tdls_mgmt, TDLS_MGMT);
1416                         CMD(tdls_oper, TDLS_OPER);
1417                 }
1418                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1419                         CMD(sched_scan_start, START_SCHED_SCAN);
1420                 CMD(probe_client, PROBE_CLIENT);
1421                 CMD(set_noack_map, SET_NOACK_MAP);
1422                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1423                         i++;
1424                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1425                                 goto nla_put_failure;
1426                 }
1427                 CMD(start_p2p_device, START_P2P_DEVICE);
1428                 CMD(set_mcast_rate, SET_MCAST_RATE);
1429                 if (state->split) {
1430                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1431                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1432                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1433                                 CMD(channel_switch, CHANNEL_SWITCH);
1434                 }
1435
1436 #ifdef CONFIG_NL80211_TESTMODE
1437                 CMD(testmode_cmd, TESTMODE);
1438 #endif
1439
1440 #undef CMD
1441
1442                 if (dev->ops->connect || dev->ops->auth) {
1443                         i++;
1444                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1445                                 goto nla_put_failure;
1446                 }
1447
1448                 if (dev->ops->disconnect || dev->ops->deauth) {
1449                         i++;
1450                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1451                                 goto nla_put_failure;
1452                 }
1453
1454                 nla_nest_end(msg, nl_cmds);
1455                 state->split_start++;
1456                 if (state->split)
1457                         break;
1458         case 5:
1459                 if (dev->ops->remain_on_channel &&
1460                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1461                     nla_put_u32(msg,
1462                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1463                                 dev->wiphy.max_remain_on_channel_duration))
1464                         goto nla_put_failure;
1465
1466                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1467                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1468                         goto nla_put_failure;
1469
1470                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1471                         goto nla_put_failure;
1472                 state->split_start++;
1473                 if (state->split)
1474                         break;
1475         case 6:
1476 #ifdef CONFIG_PM
1477                 if (nl80211_send_wowlan(msg, dev, state->split))
1478                         goto nla_put_failure;
1479                 state->split_start++;
1480                 if (state->split)
1481                         break;
1482 #else
1483                 state->split_start++;
1484 #endif
1485         case 7:
1486                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1487                                         dev->wiphy.software_iftypes))
1488                         goto nla_put_failure;
1489
1490                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1491                                                    state->split))
1492                         goto nla_put_failure;
1493
1494                 state->split_start++;
1495                 if (state->split)
1496                         break;
1497         case 8:
1498                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1499                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1500                                 dev->wiphy.ap_sme_capa))
1501                         goto nla_put_failure;
1502
1503                 features = dev->wiphy.features;
1504                 /*
1505                  * We can only add the per-channel limit information if the
1506                  * dump is split, otherwise it makes it too big. Therefore
1507                  * only advertise it in that case.
1508                  */
1509                 if (state->split)
1510                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1511                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1512                         goto nla_put_failure;
1513
1514                 if (dev->wiphy.ht_capa_mod_mask &&
1515                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1516                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1517                             dev->wiphy.ht_capa_mod_mask))
1518                         goto nla_put_failure;
1519
1520                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1521                     dev->wiphy.max_acl_mac_addrs &&
1522                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1523                                 dev->wiphy.max_acl_mac_addrs))
1524                         goto nla_put_failure;
1525
1526                 /*
1527                  * Any information below this point is only available to
1528                  * applications that can deal with it being split. This
1529                  * helps ensure that newly added capabilities don't break
1530                  * older tools by overrunning their buffers.
1531                  *
1532                  * We still increment split_start so that in the split
1533                  * case we'll continue with more data in the next round,
1534                  * but break unconditionally so unsplit data stops here.
1535                  */
1536                 state->split_start++;
1537                 break;
1538         case 9:
1539                 if (dev->wiphy.extended_capabilities &&
1540                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1541                              dev->wiphy.extended_capabilities_len,
1542                              dev->wiphy.extended_capabilities) ||
1543                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1544                              dev->wiphy.extended_capabilities_len,
1545                              dev->wiphy.extended_capabilities_mask)))
1546                         goto nla_put_failure;
1547
1548                 if (dev->wiphy.vht_capa_mod_mask &&
1549                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1550                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1551                             dev->wiphy.vht_capa_mod_mask))
1552                         goto nla_put_failure;
1553
1554                 state->split_start++;
1555                 break;
1556         case 10:
1557                 if (nl80211_send_coalesce(msg, dev))
1558                         goto nla_put_failure;
1559
1560                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1561                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1562                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1563                         goto nla_put_failure;
1564
1565                 /* done */
1566                 state->split_start = 0;
1567                 break;
1568         }
1569         return genlmsg_end(msg, hdr);
1570
1571  nla_put_failure:
1572         genlmsg_cancel(msg, hdr);
1573         return -EMSGSIZE;
1574 }
1575
1576 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1577                                     struct netlink_callback *cb,
1578                                     struct nl80211_dump_wiphy_state *state)
1579 {
1580         struct nlattr **tb = nl80211_fam.attrbuf;
1581         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1582                               tb, nl80211_fam.maxattr, nl80211_policy);
1583         /* ignore parse errors for backward compatibility */
1584         if (ret)
1585                 return 0;
1586
1587         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1588         if (tb[NL80211_ATTR_WIPHY])
1589                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1590         if (tb[NL80211_ATTR_WDEV])
1591                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1592         if (tb[NL80211_ATTR_IFINDEX]) {
1593                 struct net_device *netdev;
1594                 struct cfg80211_registered_device *rdev;
1595                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1596
1597                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1598                 if (!netdev)
1599                         return -ENODEV;
1600                 if (netdev->ieee80211_ptr) {
1601                         rdev = wiphy_to_dev(
1602                                 netdev->ieee80211_ptr->wiphy);
1603                         state->filter_wiphy = rdev->wiphy_idx;
1604                 }
1605                 dev_put(netdev);
1606         }
1607
1608         return 0;
1609 }
1610
1611 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1612 {
1613         int idx = 0, ret;
1614         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1615         struct cfg80211_registered_device *dev;
1616
1617         rtnl_lock();
1618         if (!state) {
1619                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1620                 if (!state) {
1621                         rtnl_unlock();
1622                         return -ENOMEM;
1623                 }
1624                 state->filter_wiphy = -1;
1625                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1626                 if (ret) {
1627                         kfree(state);
1628                         rtnl_unlock();
1629                         return ret;
1630                 }
1631                 cb->args[0] = (long)state;
1632         }
1633
1634         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1635                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1636                         continue;
1637                 if (++idx <= state->start)
1638                         continue;
1639                 if (state->filter_wiphy != -1 &&
1640                     state->filter_wiphy != dev->wiphy_idx)
1641                         continue;
1642                 /* attempt to fit multiple wiphy data chunks into the skb */
1643                 do {
1644                         ret = nl80211_send_wiphy(dev, skb,
1645                                                  NETLINK_CB(cb->skb).portid,
1646                                                  cb->nlh->nlmsg_seq,
1647                                                  NLM_F_MULTI, state);
1648                         if (ret < 0) {
1649                                 /*
1650                                  * If sending the wiphy data didn't fit (ENOBUFS
1651                                  * or EMSGSIZE returned), this SKB is still
1652                                  * empty (so it's not too big because another
1653                                  * wiphy dataset is already in the skb) and
1654                                  * we've not tried to adjust the dump allocation
1655                                  * yet ... then adjust the alloc size to be
1656                                  * bigger, and return 1 but with the empty skb.
1657                                  * This results in an empty message being RX'ed
1658                                  * in userspace, but that is ignored.
1659                                  *
1660                                  * We can then retry with the larger buffer.
1661                                  */
1662                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1663                                     !skb->len &&
1664                                     cb->min_dump_alloc < 4096) {
1665                                         cb->min_dump_alloc = 4096;
1666                                         rtnl_unlock();
1667                                         return 1;
1668                                 }
1669                                 idx--;
1670                                 break;
1671                         }
1672                 } while (state->split_start > 0);
1673                 break;
1674         }
1675         rtnl_unlock();
1676
1677         state->start = idx;
1678
1679         return skb->len;
1680 }
1681
1682 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1683 {
1684         kfree((void *)cb->args[0]);
1685         return 0;
1686 }
1687
1688 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1689 {
1690         struct sk_buff *msg;
1691         struct cfg80211_registered_device *dev = info->user_ptr[0];
1692         struct nl80211_dump_wiphy_state state = {};
1693
1694         msg = nlmsg_new(4096, GFP_KERNEL);
1695         if (!msg)
1696                 return -ENOMEM;
1697
1698         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1699                                &state) < 0) {
1700                 nlmsg_free(msg);
1701                 return -ENOBUFS;
1702         }
1703
1704         return genlmsg_reply(msg, info);
1705 }
1706
1707 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1708         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1709         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1710         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1711         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1712         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1713 };
1714
1715 static int parse_txq_params(struct nlattr *tb[],
1716                             struct ieee80211_txq_params *txq_params)
1717 {
1718         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1719             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1720             !tb[NL80211_TXQ_ATTR_AIFS])
1721                 return -EINVAL;
1722
1723         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1724         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1725         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1726         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1727         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1728
1729         if (txq_params->ac >= NL80211_NUM_ACS)
1730                 return -EINVAL;
1731
1732         return 0;
1733 }
1734
1735 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1736 {
1737         /*
1738          * You can only set the channel explicitly for WDS interfaces,
1739          * all others have their channel managed via their respective
1740          * "establish a connection" command (connect, join, ...)
1741          *
1742          * For AP/GO and mesh mode, the channel can be set with the
1743          * channel userspace API, but is only stored and passed to the
1744          * low-level driver when the AP starts or the mesh is joined.
1745          * This is for backward compatibility, userspace can also give
1746          * the channel in the start-ap or join-mesh commands instead.
1747          *
1748          * Monitors are special as they are normally slaved to
1749          * whatever else is going on, so they have their own special
1750          * operation to set the monitor channel if possible.
1751          */
1752         return !wdev ||
1753                 wdev->iftype == NL80211_IFTYPE_AP ||
1754                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1755                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1756                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1757 }
1758
1759 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1760                                  struct genl_info *info,
1761                                  struct cfg80211_chan_def *chandef)
1762 {
1763         u32 control_freq;
1764
1765         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1766                 return -EINVAL;
1767
1768         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1769
1770         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1771         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1772         chandef->center_freq1 = control_freq;
1773         chandef->center_freq2 = 0;
1774
1775         /* Primary channel not allowed */
1776         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1777                 return -EINVAL;
1778
1779         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1780                 enum nl80211_channel_type chantype;
1781
1782                 chantype = nla_get_u32(
1783                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1784
1785                 switch (chantype) {
1786                 case NL80211_CHAN_NO_HT:
1787                 case NL80211_CHAN_HT20:
1788                 case NL80211_CHAN_HT40PLUS:
1789                 case NL80211_CHAN_HT40MINUS:
1790                         cfg80211_chandef_create(chandef, chandef->chan,
1791                                                 chantype);
1792                         break;
1793                 default:
1794                         return -EINVAL;
1795                 }
1796         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1797                 chandef->width =
1798                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1799                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1800                         chandef->center_freq1 =
1801                                 nla_get_u32(
1802                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1803                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1804                         chandef->center_freq2 =
1805                                 nla_get_u32(
1806                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1807         }
1808
1809         if (!cfg80211_chandef_valid(chandef))
1810                 return -EINVAL;
1811
1812         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1813                                      IEEE80211_CHAN_DISABLED))
1814                 return -EINVAL;
1815
1816         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1817              chandef->width == NL80211_CHAN_WIDTH_10) &&
1818             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1819                 return -EINVAL;
1820
1821         return 0;
1822 }
1823
1824 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1825                                  struct wireless_dev *wdev,
1826                                  struct genl_info *info)
1827 {
1828         struct cfg80211_chan_def chandef;
1829         int result;
1830         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1831
1832         if (wdev)
1833                 iftype = wdev->iftype;
1834
1835         if (!nl80211_can_set_dev_channel(wdev))
1836                 return -EOPNOTSUPP;
1837
1838         result = nl80211_parse_chandef(rdev, info, &chandef);
1839         if (result)
1840                 return result;
1841
1842         switch (iftype) {
1843         case NL80211_IFTYPE_AP:
1844         case NL80211_IFTYPE_P2P_GO:
1845                 if (wdev->beacon_interval) {
1846                         result = -EBUSY;
1847                         break;
1848                 }
1849                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1850                         result = -EINVAL;
1851                         break;
1852                 }
1853                 wdev->preset_chandef = chandef;
1854                 result = 0;
1855                 break;
1856         case NL80211_IFTYPE_MESH_POINT:
1857                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1858                 break;
1859         case NL80211_IFTYPE_MONITOR:
1860                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1861                 break;
1862         default:
1863                 result = -EINVAL;
1864         }
1865
1866         return result;
1867 }
1868
1869 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1870 {
1871         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1872         struct net_device *netdev = info->user_ptr[1];
1873
1874         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1875 }
1876
1877 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1878 {
1879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1880         struct net_device *dev = info->user_ptr[1];
1881         struct wireless_dev *wdev = dev->ieee80211_ptr;
1882         const u8 *bssid;
1883
1884         if (!info->attrs[NL80211_ATTR_MAC])
1885                 return -EINVAL;
1886
1887         if (netif_running(dev))
1888                 return -EBUSY;
1889
1890         if (!rdev->ops->set_wds_peer)
1891                 return -EOPNOTSUPP;
1892
1893         if (wdev->iftype != NL80211_IFTYPE_WDS)
1894                 return -EOPNOTSUPP;
1895
1896         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1897         return rdev_set_wds_peer(rdev, dev, bssid);
1898 }
1899
1900
1901 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1902 {
1903         struct cfg80211_registered_device *rdev;
1904         struct net_device *netdev = NULL;
1905         struct wireless_dev *wdev;
1906         int result = 0, rem_txq_params = 0;
1907         struct nlattr *nl_txq_params;
1908         u32 changed;
1909         u8 retry_short = 0, retry_long = 0;
1910         u32 frag_threshold = 0, rts_threshold = 0;
1911         u8 coverage_class = 0;
1912
1913         ASSERT_RTNL();
1914
1915         /*
1916          * Try to find the wiphy and netdev. Normally this
1917          * function shouldn't need the netdev, but this is
1918          * done for backward compatibility -- previously
1919          * setting the channel was done per wiphy, but now
1920          * it is per netdev. Previous userland like hostapd
1921          * also passed a netdev to set_wiphy, so that it is
1922          * possible to let that go to the right netdev!
1923          */
1924
1925         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1926                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1927
1928                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1929                 if (netdev && netdev->ieee80211_ptr)
1930                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1931                 else
1932                         netdev = NULL;
1933         }
1934
1935         if (!netdev) {
1936                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1937                                                   info->attrs);
1938                 if (IS_ERR(rdev))
1939                         return PTR_ERR(rdev);
1940                 wdev = NULL;
1941                 netdev = NULL;
1942                 result = 0;
1943         } else
1944                 wdev = netdev->ieee80211_ptr;
1945
1946         /*
1947          * end workaround code, by now the rdev is available
1948          * and locked, and wdev may or may not be NULL.
1949          */
1950
1951         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1952                 result = cfg80211_dev_rename(
1953                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1954
1955         if (result)
1956                 goto bad_res;
1957
1958         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1959                 struct ieee80211_txq_params txq_params;
1960                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1961
1962                 if (!rdev->ops->set_txq_params) {
1963                         result = -EOPNOTSUPP;
1964                         goto bad_res;
1965                 }
1966
1967                 if (!netdev) {
1968                         result = -EINVAL;
1969                         goto bad_res;
1970                 }
1971
1972                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1973                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1974                         result = -EINVAL;
1975                         goto bad_res;
1976                 }
1977
1978                 if (!netif_running(netdev)) {
1979                         result = -ENETDOWN;
1980                         goto bad_res;
1981                 }
1982
1983                 nla_for_each_nested(nl_txq_params,
1984                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1985                                     rem_txq_params) {
1986                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1987                                   nla_data(nl_txq_params),
1988                                   nla_len(nl_txq_params),
1989                                   txq_params_policy);
1990                         result = parse_txq_params(tb, &txq_params);
1991                         if (result)
1992                                 goto bad_res;
1993
1994                         result = rdev_set_txq_params(rdev, netdev,
1995                                                      &txq_params);
1996                         if (result)
1997                                 goto bad_res;
1998                 }
1999         }
2000
2001         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2002                 result = __nl80211_set_channel(rdev,
2003                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
2004                                 info);
2005                 if (result)
2006                         goto bad_res;
2007         }
2008
2009         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2010                 struct wireless_dev *txp_wdev = wdev;
2011                 enum nl80211_tx_power_setting type;
2012                 int idx, mbm = 0;
2013
2014                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2015                         txp_wdev = NULL;
2016
2017                 if (!rdev->ops->set_tx_power) {
2018                         result = -EOPNOTSUPP;
2019                         goto bad_res;
2020                 }
2021
2022                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2023                 type = nla_get_u32(info->attrs[idx]);
2024
2025                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2026                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2027                         result = -EINVAL;
2028                         goto bad_res;
2029                 }
2030
2031                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2032                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2033                         mbm = nla_get_u32(info->attrs[idx]);
2034                 }
2035
2036                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2037                 if (result)
2038                         goto bad_res;
2039         }
2040
2041         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2042             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2043                 u32 tx_ant, rx_ant;
2044                 if ((!rdev->wiphy.available_antennas_tx &&
2045                      !rdev->wiphy.available_antennas_rx) ||
2046                     !rdev->ops->set_antenna) {
2047                         result = -EOPNOTSUPP;
2048                         goto bad_res;
2049                 }
2050
2051                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2052                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2053
2054                 /* reject antenna configurations which don't match the
2055                  * available antenna masks, except for the "all" mask */
2056                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2057                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2058                         result = -EINVAL;
2059                         goto bad_res;
2060                 }
2061
2062                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2063                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2064
2065                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2066                 if (result)
2067                         goto bad_res;
2068         }
2069
2070         changed = 0;
2071
2072         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2073                 retry_short = nla_get_u8(
2074                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2075                 if (retry_short == 0) {
2076                         result = -EINVAL;
2077                         goto bad_res;
2078                 }
2079                 changed |= WIPHY_PARAM_RETRY_SHORT;
2080         }
2081
2082         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2083                 retry_long = nla_get_u8(
2084                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2085                 if (retry_long == 0) {
2086                         result = -EINVAL;
2087                         goto bad_res;
2088                 }
2089                 changed |= WIPHY_PARAM_RETRY_LONG;
2090         }
2091
2092         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2093                 frag_threshold = nla_get_u32(
2094                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2095                 if (frag_threshold < 256) {
2096                         result = -EINVAL;
2097                         goto bad_res;
2098                 }
2099                 if (frag_threshold != (u32) -1) {
2100                         /*
2101                          * Fragments (apart from the last one) are required to
2102                          * have even length. Make the fragmentation code
2103                          * simpler by stripping LSB should someone try to use
2104                          * odd threshold value.
2105                          */
2106                         frag_threshold &= ~0x1;
2107                 }
2108                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2109         }
2110
2111         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2112                 rts_threshold = nla_get_u32(
2113                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2114                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2115         }
2116
2117         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2118                 coverage_class = nla_get_u8(
2119                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2120                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2121         }
2122
2123         if (changed) {
2124                 u8 old_retry_short, old_retry_long;
2125                 u32 old_frag_threshold, old_rts_threshold;
2126                 u8 old_coverage_class;
2127
2128                 if (!rdev->ops->set_wiphy_params) {
2129                         result = -EOPNOTSUPP;
2130                         goto bad_res;
2131                 }
2132
2133                 old_retry_short = rdev->wiphy.retry_short;
2134                 old_retry_long = rdev->wiphy.retry_long;
2135                 old_frag_threshold = rdev->wiphy.frag_threshold;
2136                 old_rts_threshold = rdev->wiphy.rts_threshold;
2137                 old_coverage_class = rdev->wiphy.coverage_class;
2138
2139                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2140                         rdev->wiphy.retry_short = retry_short;
2141                 if (changed & WIPHY_PARAM_RETRY_LONG)
2142                         rdev->wiphy.retry_long = retry_long;
2143                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2144                         rdev->wiphy.frag_threshold = frag_threshold;
2145                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2146                         rdev->wiphy.rts_threshold = rts_threshold;
2147                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2148                         rdev->wiphy.coverage_class = coverage_class;
2149
2150                 result = rdev_set_wiphy_params(rdev, changed);
2151                 if (result) {
2152                         rdev->wiphy.retry_short = old_retry_short;
2153                         rdev->wiphy.retry_long = old_retry_long;
2154                         rdev->wiphy.frag_threshold = old_frag_threshold;
2155                         rdev->wiphy.rts_threshold = old_rts_threshold;
2156                         rdev->wiphy.coverage_class = old_coverage_class;
2157                 }
2158         }
2159
2160  bad_res:
2161         if (netdev)
2162                 dev_put(netdev);
2163         return result;
2164 }
2165
2166 static inline u64 wdev_id(struct wireless_dev *wdev)
2167 {
2168         return (u64)wdev->identifier |
2169                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2170 }
2171
2172 static int nl80211_send_chandef(struct sk_buff *msg,
2173                                 const struct cfg80211_chan_def *chandef)
2174 {
2175         WARN_ON(!cfg80211_chandef_valid(chandef));
2176
2177         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2178                         chandef->chan->center_freq))
2179                 return -ENOBUFS;
2180         switch (chandef->width) {
2181         case NL80211_CHAN_WIDTH_20_NOHT:
2182         case NL80211_CHAN_WIDTH_20:
2183         case NL80211_CHAN_WIDTH_40:
2184                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2185                                 cfg80211_get_chandef_type(chandef)))
2186                         return -ENOBUFS;
2187                 break;
2188         default:
2189                 break;
2190         }
2191         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2192                 return -ENOBUFS;
2193         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2194                 return -ENOBUFS;
2195         if (chandef->center_freq2 &&
2196             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2197                 return -ENOBUFS;
2198         return 0;
2199 }
2200
2201 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2202                               struct cfg80211_registered_device *rdev,
2203                               struct wireless_dev *wdev)
2204 {
2205         struct net_device *dev = wdev->netdev;
2206         void *hdr;
2207
2208         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2209         if (!hdr)
2210                 return -1;
2211
2212         if (dev &&
2213             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2214              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2215                 goto nla_put_failure;
2216
2217         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2218             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2219             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2220             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2221             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2222                         rdev->devlist_generation ^
2223                         (cfg80211_rdev_list_generation << 2)))
2224                 goto nla_put_failure;
2225
2226         if (rdev->ops->get_channel) {
2227                 int ret;
2228                 struct cfg80211_chan_def chandef;
2229
2230                 ret = rdev_get_channel(rdev, wdev, &chandef);
2231                 if (ret == 0) {
2232                         if (nl80211_send_chandef(msg, &chandef))
2233                                 goto nla_put_failure;
2234                 }
2235         }
2236
2237         if (wdev->ssid_len) {
2238                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2239                         goto nla_put_failure;
2240         }
2241
2242         return genlmsg_end(msg, hdr);
2243
2244  nla_put_failure:
2245         genlmsg_cancel(msg, hdr);
2246         return -EMSGSIZE;
2247 }
2248
2249 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2250 {
2251         int wp_idx = 0;
2252         int if_idx = 0;
2253         int wp_start = cb->args[0];
2254         int if_start = cb->args[1];
2255         struct cfg80211_registered_device *rdev;
2256         struct wireless_dev *wdev;
2257
2258         rtnl_lock();
2259         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2260                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2261                         continue;
2262                 if (wp_idx < wp_start) {
2263                         wp_idx++;
2264                         continue;
2265                 }
2266                 if_idx = 0;
2267
2268                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2269                         if (if_idx < if_start) {
2270                                 if_idx++;
2271                                 continue;
2272                         }
2273                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2274                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2275                                                rdev, wdev) < 0) {
2276                                 goto out;
2277                         }
2278                         if_idx++;
2279                 }
2280
2281                 wp_idx++;
2282         }
2283  out:
2284         rtnl_unlock();
2285
2286         cb->args[0] = wp_idx;
2287         cb->args[1] = if_idx;
2288
2289         return skb->len;
2290 }
2291
2292 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2293 {
2294         struct sk_buff *msg;
2295         struct cfg80211_registered_device *dev = info->user_ptr[0];
2296         struct wireless_dev *wdev = info->user_ptr[1];
2297
2298         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2299         if (!msg)
2300                 return -ENOMEM;
2301
2302         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2303                                dev, wdev) < 0) {
2304                 nlmsg_free(msg);
2305                 return -ENOBUFS;
2306         }
2307
2308         return genlmsg_reply(msg, info);
2309 }
2310
2311 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2312         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2313         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2314         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2315         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2316         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2317         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2318 };
2319
2320 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2321 {
2322         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2323         int flag;
2324
2325         *mntrflags = 0;
2326
2327         if (!nla)
2328                 return -EINVAL;
2329
2330         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2331                              nla, mntr_flags_policy))
2332                 return -EINVAL;
2333
2334         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2335                 if (flags[flag])
2336                         *mntrflags |= (1<<flag);
2337
2338         return 0;
2339 }
2340
2341 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2342                                struct net_device *netdev, u8 use_4addr,
2343                                enum nl80211_iftype iftype)
2344 {
2345         if (!use_4addr) {
2346                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2347                         return -EBUSY;
2348                 return 0;
2349         }
2350
2351         switch (iftype) {
2352         case NL80211_IFTYPE_AP_VLAN:
2353                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2354                         return 0;
2355                 break;
2356         case NL80211_IFTYPE_STATION:
2357                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2358                         return 0;
2359                 break;
2360         default:
2361                 break;
2362         }
2363
2364         return -EOPNOTSUPP;
2365 }
2366
2367 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2368 {
2369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2370         struct vif_params params;
2371         int err;
2372         enum nl80211_iftype otype, ntype;
2373         struct net_device *dev = info->user_ptr[1];
2374         u32 _flags, *flags = NULL;
2375         bool change = false;
2376
2377         memset(&params, 0, sizeof(params));
2378
2379         otype = ntype = dev->ieee80211_ptr->iftype;
2380
2381         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2382                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2383                 if (otype != ntype)
2384                         change = true;
2385                 if (ntype > NL80211_IFTYPE_MAX)
2386                         return -EINVAL;
2387         }
2388
2389         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2390                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2391
2392                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2393                         return -EINVAL;
2394                 if (netif_running(dev))
2395                         return -EBUSY;
2396
2397                 wdev_lock(wdev);
2398                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2399                              IEEE80211_MAX_MESH_ID_LEN);
2400                 wdev->mesh_id_up_len =
2401                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2402                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2403                        wdev->mesh_id_up_len);
2404                 wdev_unlock(wdev);
2405         }
2406
2407         if (info->attrs[NL80211_ATTR_4ADDR]) {
2408                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2409                 change = true;
2410                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2411                 if (err)
2412                         return err;
2413         } else {
2414                 params.use_4addr = -1;
2415         }
2416
2417         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2418                 if (ntype != NL80211_IFTYPE_MONITOR)
2419                         return -EINVAL;
2420                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2421                                           &_flags);
2422                 if (err)
2423                         return err;
2424
2425                 flags = &_flags;
2426                 change = true;
2427         }
2428
2429         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2430             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2431                 return -EOPNOTSUPP;
2432
2433         if (change)
2434                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2435         else
2436                 err = 0;
2437
2438         if (!err && params.use_4addr != -1)
2439                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2440
2441         return err;
2442 }
2443
2444 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2445 {
2446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2447         struct vif_params params;
2448         struct wireless_dev *wdev;
2449         struct sk_buff *msg;
2450         int err;
2451         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2452         u32 flags;
2453
2454         memset(&params, 0, sizeof(params));
2455
2456         if (!info->attrs[NL80211_ATTR_IFNAME])
2457                 return -EINVAL;
2458
2459         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2460                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2461                 if (type > NL80211_IFTYPE_MAX)
2462                         return -EINVAL;
2463         }
2464
2465         if (!rdev->ops->add_virtual_intf ||
2466             !(rdev->wiphy.interface_modes & (1 << type)))
2467                 return -EOPNOTSUPP;
2468
2469         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2470                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2471                            ETH_ALEN);
2472                 if (!is_valid_ether_addr(params.macaddr))
2473                         return -EADDRNOTAVAIL;
2474         }
2475
2476         if (info->attrs[NL80211_ATTR_4ADDR]) {
2477                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2478                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2479                 if (err)
2480                         return err;
2481         }
2482
2483         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2484         if (!msg)
2485                 return -ENOMEM;
2486
2487         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2488                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2489                                   &flags);
2490
2491         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2492             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2493                 return -EOPNOTSUPP;
2494
2495         wdev = rdev_add_virtual_intf(rdev,
2496                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2497                                 type, err ? NULL : &flags, &params);
2498         if (IS_ERR(wdev)) {
2499                 nlmsg_free(msg);
2500                 return PTR_ERR(wdev);
2501         }
2502
2503         switch (type) {
2504         case NL80211_IFTYPE_MESH_POINT:
2505                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2506                         break;
2507                 wdev_lock(wdev);
2508                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2509                              IEEE80211_MAX_MESH_ID_LEN);
2510                 wdev->mesh_id_up_len =
2511                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2512                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2513                        wdev->mesh_id_up_len);
2514                 wdev_unlock(wdev);
2515                 break;
2516         case NL80211_IFTYPE_P2P_DEVICE:
2517                 /*
2518                  * P2P Device doesn't have a netdev, so doesn't go
2519                  * through the netdev notifier and must be added here
2520                  */
2521                 mutex_init(&wdev->mtx);
2522                 INIT_LIST_HEAD(&wdev->event_list);
2523                 spin_lock_init(&wdev->event_lock);
2524                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2525                 spin_lock_init(&wdev->mgmt_registrations_lock);
2526
2527                 wdev->identifier = ++rdev->wdev_id;
2528                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2529                 rdev->devlist_generation++;
2530                 break;
2531         default:
2532                 break;
2533         }
2534
2535         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2536                                rdev, wdev) < 0) {
2537                 nlmsg_free(msg);
2538                 return -ENOBUFS;
2539         }
2540
2541         return genlmsg_reply(msg, info);
2542 }
2543
2544 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2545 {
2546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2547         struct wireless_dev *wdev = info->user_ptr[1];
2548
2549         if (!rdev->ops->del_virtual_intf)
2550                 return -EOPNOTSUPP;
2551
2552         /*
2553          * If we remove a wireless device without a netdev then clear
2554          * user_ptr[1] so that nl80211_post_doit won't dereference it
2555          * to check if it needs to do dev_put(). Otherwise it crashes
2556          * since the wdev has been freed, unlike with a netdev where
2557          * we need the dev_put() for the netdev to really be freed.
2558          */
2559         if (!wdev->netdev)
2560                 info->user_ptr[1] = NULL;
2561
2562         return rdev_del_virtual_intf(rdev, wdev);
2563 }
2564
2565 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2566 {
2567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2568         struct net_device *dev = info->user_ptr[1];
2569         u16 noack_map;
2570
2571         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2572                 return -EINVAL;
2573
2574         if (!rdev->ops->set_noack_map)
2575                 return -EOPNOTSUPP;
2576
2577         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2578
2579         return rdev_set_noack_map(rdev, dev, noack_map);
2580 }
2581
2582 struct get_key_cookie {
2583         struct sk_buff *msg;
2584         int error;
2585         int idx;
2586 };
2587
2588 static void get_key_callback(void *c, struct key_params *params)
2589 {
2590         struct nlattr *key;
2591         struct get_key_cookie *cookie = c;
2592
2593         if ((params->key &&
2594              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2595                      params->key_len, params->key)) ||
2596             (params->seq &&
2597              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2598                      params->seq_len, params->seq)) ||
2599             (params->cipher &&
2600              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2601                          params->cipher)))
2602                 goto nla_put_failure;
2603
2604         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2605         if (!key)
2606                 goto nla_put_failure;
2607
2608         if ((params->key &&
2609              nla_put(cookie->msg, NL80211_KEY_DATA,
2610                      params->key_len, params->key)) ||
2611             (params->seq &&
2612              nla_put(cookie->msg, NL80211_KEY_SEQ,
2613                      params->seq_len, params->seq)) ||
2614             (params->cipher &&
2615              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2616                          params->cipher)))
2617                 goto nla_put_failure;
2618
2619         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2620                 goto nla_put_failure;
2621
2622         nla_nest_end(cookie->msg, key);
2623
2624         return;
2625  nla_put_failure:
2626         cookie->error = 1;
2627 }
2628
2629 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2630 {
2631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2632         int err;
2633         struct net_device *dev = info->user_ptr[1];
2634         u8 key_idx = 0;
2635         const u8 *mac_addr = NULL;
2636         bool pairwise;
2637         struct get_key_cookie cookie = {
2638                 .error = 0,
2639         };
2640         void *hdr;
2641         struct sk_buff *msg;
2642
2643         if (info->attrs[NL80211_ATTR_KEY_IDX])
2644                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2645
2646         if (key_idx > 5)
2647                 return -EINVAL;
2648
2649         if (info->attrs[NL80211_ATTR_MAC])
2650                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2651
2652         pairwise = !!mac_addr;
2653         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2654                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2655                 if (kt >= NUM_NL80211_KEYTYPES)
2656                         return -EINVAL;
2657                 if (kt != NL80211_KEYTYPE_GROUP &&
2658                     kt != NL80211_KEYTYPE_PAIRWISE)
2659                         return -EINVAL;
2660                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2661         }
2662
2663         if (!rdev->ops->get_key)
2664                 return -EOPNOTSUPP;
2665
2666         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2667         if (!msg)
2668                 return -ENOMEM;
2669
2670         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2671                              NL80211_CMD_NEW_KEY);
2672         if (!hdr)
2673                 return -ENOBUFS;
2674
2675         cookie.msg = msg;
2676         cookie.idx = key_idx;
2677
2678         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2679             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2680                 goto nla_put_failure;
2681         if (mac_addr &&
2682             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2683                 goto nla_put_failure;
2684
2685         if (pairwise && mac_addr &&
2686             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2687                 return -ENOENT;
2688
2689         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2690                            get_key_callback);
2691
2692         if (err)
2693                 goto free_msg;
2694
2695         if (cookie.error)
2696                 goto nla_put_failure;
2697
2698         genlmsg_end(msg, hdr);
2699         return genlmsg_reply(msg, info);
2700
2701  nla_put_failure:
2702         err = -ENOBUFS;
2703  free_msg:
2704         nlmsg_free(msg);
2705         return err;
2706 }
2707
2708 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2709 {
2710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2711         struct key_parse key;
2712         int err;
2713         struct net_device *dev = info->user_ptr[1];
2714
2715         err = nl80211_parse_key(info, &key);
2716         if (err)
2717                 return err;
2718
2719         if (key.idx < 0)
2720                 return -EINVAL;
2721
2722         /* only support setting default key */
2723         if (!key.def && !key.defmgmt)
2724                 return -EINVAL;
2725
2726         wdev_lock(dev->ieee80211_ptr);
2727
2728         if (key.def) {
2729                 if (!rdev->ops->set_default_key) {
2730                         err = -EOPNOTSUPP;
2731                         goto out;
2732                 }
2733
2734                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2735                 if (err)
2736                         goto out;
2737
2738                 err = rdev_set_default_key(rdev, dev, key.idx,
2739                                                  key.def_uni, key.def_multi);
2740
2741                 if (err)
2742                         goto out;
2743
2744 #ifdef CONFIG_CFG80211_WEXT
2745                 dev->ieee80211_ptr->wext.default_key = key.idx;
2746 #endif
2747         } else {
2748                 if (key.def_uni || !key.def_multi) {
2749                         err = -EINVAL;
2750                         goto out;
2751                 }
2752
2753                 if (!rdev->ops->set_default_mgmt_key) {
2754                         err = -EOPNOTSUPP;
2755                         goto out;
2756                 }
2757
2758                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2759                 if (err)
2760                         goto out;
2761
2762                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2763                 if (err)
2764                         goto out;
2765
2766 #ifdef CONFIG_CFG80211_WEXT
2767                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2768 #endif
2769         }
2770
2771  out:
2772         wdev_unlock(dev->ieee80211_ptr);
2773
2774         return err;
2775 }
2776
2777 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2778 {
2779         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2780         int err;
2781         struct net_device *dev = info->user_ptr[1];
2782         struct key_parse key;
2783         const u8 *mac_addr = NULL;
2784
2785         err = nl80211_parse_key(info, &key);
2786         if (err)
2787                 return err;
2788
2789         if (!key.p.key)
2790                 return -EINVAL;
2791
2792         if (info->attrs[NL80211_ATTR_MAC])
2793                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2794
2795         if (key.type == -1) {
2796                 if (mac_addr)
2797                         key.type = NL80211_KEYTYPE_PAIRWISE;
2798                 else
2799                         key.type = NL80211_KEYTYPE_GROUP;
2800         }
2801
2802         /* for now */
2803         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2804             key.type != NL80211_KEYTYPE_GROUP)
2805                 return -EINVAL;
2806
2807         if (!rdev->ops->add_key)
2808                 return -EOPNOTSUPP;
2809
2810         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2811                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2812                                            mac_addr))
2813                 return -EINVAL;
2814
2815         wdev_lock(dev->ieee80211_ptr);
2816         err = nl80211_key_allowed(dev->ieee80211_ptr);
2817         if (!err)
2818                 err = rdev_add_key(rdev, dev, key.idx,
2819                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2820                                     mac_addr, &key.p);
2821         wdev_unlock(dev->ieee80211_ptr);
2822
2823         return err;
2824 }
2825
2826 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2827 {
2828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2829         int err;
2830         struct net_device *dev = info->user_ptr[1];
2831         u8 *mac_addr = NULL;
2832         struct key_parse key;
2833
2834         err = nl80211_parse_key(info, &key);
2835         if (err)
2836                 return err;
2837
2838         if (info->attrs[NL80211_ATTR_MAC])
2839                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2840
2841         if (key.type == -1) {
2842                 if (mac_addr)
2843                         key.type = NL80211_KEYTYPE_PAIRWISE;
2844                 else
2845                         key.type = NL80211_KEYTYPE_GROUP;
2846         }
2847
2848         /* for now */
2849         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2850             key.type != NL80211_KEYTYPE_GROUP)
2851                 return -EINVAL;
2852
2853         if (!rdev->ops->del_key)
2854                 return -EOPNOTSUPP;
2855
2856         wdev_lock(dev->ieee80211_ptr);
2857         err = nl80211_key_allowed(dev->ieee80211_ptr);
2858
2859         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2860             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2861                 err = -ENOENT;
2862
2863         if (!err)
2864                 err = rdev_del_key(rdev, dev, key.idx,
2865                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2866                                    mac_addr);
2867
2868 #ifdef CONFIG_CFG80211_WEXT
2869         if (!err) {
2870                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2871                         dev->ieee80211_ptr->wext.default_key = -1;
2872                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2873                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2874         }
2875 #endif
2876         wdev_unlock(dev->ieee80211_ptr);
2877
2878         return err;
2879 }
2880
2881 /* This function returns an error or the number of nested attributes */
2882 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2883 {
2884         struct nlattr *attr;
2885         int n_entries = 0, tmp;
2886
2887         nla_for_each_nested(attr, nl_attr, tmp) {
2888                 if (nla_len(attr) != ETH_ALEN)
2889                         return -EINVAL;
2890
2891                 n_entries++;
2892         }
2893
2894         return n_entries;
2895 }
2896
2897 /*
2898  * This function parses ACL information and allocates memory for ACL data.
2899  * On successful return, the calling function is responsible to free the
2900  * ACL buffer returned by this function.
2901  */
2902 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2903                                                 struct genl_info *info)
2904 {
2905         enum nl80211_acl_policy acl_policy;
2906         struct nlattr *attr;
2907         struct cfg80211_acl_data *acl;
2908         int i = 0, n_entries, tmp;
2909
2910         if (!wiphy->max_acl_mac_addrs)
2911                 return ERR_PTR(-EOPNOTSUPP);
2912
2913         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2914                 return ERR_PTR(-EINVAL);
2915
2916         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2917         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2918             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2919                 return ERR_PTR(-EINVAL);
2920
2921         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2922                 return ERR_PTR(-EINVAL);
2923
2924         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2925         if (n_entries < 0)
2926                 return ERR_PTR(n_entries);
2927
2928         if (n_entries > wiphy->max_acl_mac_addrs)
2929                 return ERR_PTR(-ENOTSUPP);
2930
2931         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2932                       GFP_KERNEL);
2933         if (!acl)
2934                 return ERR_PTR(-ENOMEM);
2935
2936         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2937                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2938                 i++;
2939         }
2940
2941         acl->n_acl_entries = n_entries;
2942         acl->acl_policy = acl_policy;
2943
2944         return acl;
2945 }
2946
2947 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2948 {
2949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2950         struct net_device *dev = info->user_ptr[1];
2951         struct cfg80211_acl_data *acl;
2952         int err;
2953
2954         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2955             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2956                 return -EOPNOTSUPP;
2957
2958         if (!dev->ieee80211_ptr->beacon_interval)
2959                 return -EINVAL;
2960
2961         acl = parse_acl_data(&rdev->wiphy, info);
2962         if (IS_ERR(acl))
2963                 return PTR_ERR(acl);
2964
2965         err = rdev_set_mac_acl(rdev, dev, acl);
2966
2967         kfree(acl);
2968
2969         return err;
2970 }
2971
2972 static int nl80211_parse_beacon(struct nlattr *attrs[],
2973                                 struct cfg80211_beacon_data *bcn)
2974 {
2975         bool haveinfo = false;
2976
2977         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2978             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2979             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2980             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2981                 return -EINVAL;
2982
2983         memset(bcn, 0, sizeof(*bcn));
2984
2985         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
2986                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
2987                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
2988                 if (!bcn->head_len)
2989                         return -EINVAL;
2990                 haveinfo = true;
2991         }
2992
2993         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
2994                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
2995                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
2996                 haveinfo = true;
2997         }
2998
2999         if (!haveinfo)
3000                 return -EINVAL;
3001
3002         if (attrs[NL80211_ATTR_IE]) {
3003                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3004                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3005         }
3006
3007         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3008                 bcn->proberesp_ies =
3009                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3010                 bcn->proberesp_ies_len =
3011                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3012         }
3013
3014         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3015                 bcn->assocresp_ies =
3016                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3017                 bcn->assocresp_ies_len =
3018                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3019         }
3020
3021         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3022                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3023                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3024         }
3025
3026         return 0;
3027 }
3028
3029 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3030                                    struct cfg80211_ap_settings *params)
3031 {
3032         struct wireless_dev *wdev;
3033         bool ret = false;
3034
3035         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3036                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3037                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3038                         continue;
3039
3040                 if (!wdev->preset_chandef.chan)
3041                         continue;
3042
3043                 params->chandef = wdev->preset_chandef;
3044                 ret = true;
3045                 break;
3046         }
3047
3048         return ret;
3049 }
3050
3051 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3052                                     enum nl80211_auth_type auth_type,
3053                                     enum nl80211_commands cmd)
3054 {
3055         if (auth_type > NL80211_AUTHTYPE_MAX)
3056                 return false;
3057
3058         switch (cmd) {
3059         case NL80211_CMD_AUTHENTICATE:
3060                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3061                     auth_type == NL80211_AUTHTYPE_SAE)
3062                         return false;
3063                 return true;
3064         case NL80211_CMD_CONNECT:
3065         case NL80211_CMD_START_AP:
3066                 /* SAE not supported yet */
3067                 if (auth_type == NL80211_AUTHTYPE_SAE)
3068                         return false;
3069                 return true;
3070         default:
3071                 return false;
3072         }
3073 }
3074
3075 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3076 {
3077         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3078         struct net_device *dev = info->user_ptr[1];
3079         struct wireless_dev *wdev = dev->ieee80211_ptr;
3080         struct cfg80211_ap_settings params;
3081         int err;
3082         u8 radar_detect_width = 0;
3083
3084         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3085             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3086                 return -EOPNOTSUPP;
3087
3088         if (!rdev->ops->start_ap)
3089                 return -EOPNOTSUPP;
3090
3091         if (wdev->beacon_interval)
3092                 return -EALREADY;
3093
3094         memset(&params, 0, sizeof(params));
3095
3096         /* these are required for START_AP */
3097         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3098             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3099             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3100                 return -EINVAL;
3101
3102         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3103         if (err)
3104                 return err;
3105
3106         params.beacon_interval =
3107                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3108         params.dtim_period =
3109                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3110
3111         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3112         if (err)
3113                 return err;
3114
3115         /*
3116          * In theory, some of these attributes should be required here
3117          * but since they were not used when the command was originally
3118          * added, keep them optional for old user space programs to let
3119          * them continue to work with drivers that do not need the
3120          * additional information -- drivers must check!
3121          */
3122         if (info->attrs[NL80211_ATTR_SSID]) {
3123                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3124                 params.ssid_len =
3125                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3126                 if (params.ssid_len == 0 ||
3127                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3128                         return -EINVAL;
3129         }
3130
3131         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3132                 params.hidden_ssid = nla_get_u32(
3133                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3134                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3135                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3136                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3137                         return -EINVAL;
3138         }
3139
3140         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3141
3142         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3143                 params.auth_type = nla_get_u32(
3144                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3145                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3146                                              NL80211_CMD_START_AP))
3147                         return -EINVAL;
3148         } else
3149                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3150
3151         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3152                                       NL80211_MAX_NR_CIPHER_SUITES);
3153         if (err)
3154                 return err;
3155
3156         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3157                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3158                         return -EOPNOTSUPP;
3159                 params.inactivity_timeout = nla_get_u16(
3160                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3161         }
3162
3163         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3164                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3165                         return -EINVAL;
3166                 params.p2p_ctwindow =
3167                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3168                 if (params.p2p_ctwindow > 127)
3169                         return -EINVAL;
3170                 if (params.p2p_ctwindow != 0 &&
3171                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3172                         return -EINVAL;
3173         }
3174
3175         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3176                 u8 tmp;
3177
3178                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3179                         return -EINVAL;
3180                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3181                 if (tmp > 1)
3182                         return -EINVAL;
3183                 params.p2p_opp_ps = tmp;
3184                 if (params.p2p_opp_ps != 0 &&
3185                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3186                         return -EINVAL;
3187         }
3188
3189         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3190                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3191                 if (err)
3192                         return err;
3193         } else if (wdev->preset_chandef.chan) {
3194                 params.chandef = wdev->preset_chandef;
3195         } else if (!nl80211_get_ap_channel(rdev, &params))
3196                 return -EINVAL;
3197
3198         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3199                 return -EINVAL;
3200
3201         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3202         if (err < 0)
3203                 return err;
3204         if (err) {
3205                 radar_detect_width = BIT(params.chandef.width);
3206                 params.radar_required = true;
3207         }
3208
3209         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3210                                            params.chandef.chan,
3211                                            CHAN_MODE_SHARED,
3212                                            radar_detect_width);
3213         if (err)
3214                 return err;
3215
3216         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3217                 params.acl = parse_acl_data(&rdev->wiphy, info);
3218                 if (IS_ERR(params.acl))
3219                         return PTR_ERR(params.acl);
3220         }
3221
3222         wdev_lock(wdev);
3223         err = rdev_start_ap(rdev, dev, &params);
3224         if (!err) {
3225                 wdev->preset_chandef = params.chandef;
3226                 wdev->beacon_interval = params.beacon_interval;
3227                 wdev->channel = params.chandef.chan;
3228                 wdev->ssid_len = params.ssid_len;
3229                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3230         }
3231         wdev_unlock(wdev);
3232
3233         kfree(params.acl);
3234
3235         return err;
3236 }
3237
3238 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3239 {
3240         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3241         struct net_device *dev = info->user_ptr[1];
3242         struct wireless_dev *wdev = dev->ieee80211_ptr;
3243         struct cfg80211_beacon_data params;
3244         int err;
3245
3246         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3247             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3248                 return -EOPNOTSUPP;
3249
3250         if (!rdev->ops->change_beacon)
3251                 return -EOPNOTSUPP;
3252
3253         if (!wdev->beacon_interval)
3254                 return -EINVAL;
3255
3256         err = nl80211_parse_beacon(info->attrs, &params);
3257         if (err)
3258                 return err;
3259
3260         wdev_lock(wdev);
3261         err = rdev_change_beacon(rdev, dev, &params);
3262         wdev_unlock(wdev);
3263
3264         return err;
3265 }
3266
3267 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3268 {
3269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3270         struct net_device *dev = info->user_ptr[1];
3271
3272         return cfg80211_stop_ap(rdev, dev);
3273 }
3274
3275 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3276         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3277         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3278         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3279         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3280         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3281         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3282 };
3283
3284 static int parse_station_flags(struct genl_info *info,
3285                                enum nl80211_iftype iftype,
3286                                struct station_parameters *params)
3287 {
3288         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3289         struct nlattr *nla;
3290         int flag;
3291
3292         /*
3293          * Try parsing the new attribute first so userspace
3294          * can specify both for older kernels.
3295          */
3296         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3297         if (nla) {
3298                 struct nl80211_sta_flag_update *sta_flags;
3299
3300                 sta_flags = nla_data(nla);
3301                 params->sta_flags_mask = sta_flags->mask;
3302                 params->sta_flags_set = sta_flags->set;
3303                 params->sta_flags_set &= params->sta_flags_mask;
3304                 if ((params->sta_flags_mask |
3305                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3306                         return -EINVAL;
3307                 return 0;
3308         }
3309
3310         /* if present, parse the old attribute */
3311
3312         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3313         if (!nla)
3314                 return 0;
3315
3316         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3317                              nla, sta_flags_policy))
3318                 return -EINVAL;
3319
3320         /*
3321          * Only allow certain flags for interface types so that
3322          * other attributes are silently ignored. Remember that
3323          * this is backward compatibility code with old userspace
3324          * and shouldn't be hit in other cases anyway.
3325          */
3326         switch (iftype) {
3327         case NL80211_IFTYPE_AP:
3328         case NL80211_IFTYPE_AP_VLAN:
3329         case NL80211_IFTYPE_P2P_GO:
3330                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3331                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3332                                          BIT(NL80211_STA_FLAG_WME) |
3333                                          BIT(NL80211_STA_FLAG_MFP);
3334                 break;
3335         case NL80211_IFTYPE_P2P_CLIENT:
3336         case NL80211_IFTYPE_STATION:
3337                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3338                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3339                 break;
3340         case NL80211_IFTYPE_MESH_POINT:
3341                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3342                                          BIT(NL80211_STA_FLAG_MFP) |
3343                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3344         default:
3345                 return -EINVAL;
3346         }
3347
3348         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3349                 if (flags[flag]) {
3350                         params->sta_flags_set |= (1<<flag);
3351
3352                         /* no longer support new API additions in old API */
3353                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3354                                 return -EINVAL;
3355                 }
3356         }
3357
3358         return 0;
3359 }
3360
3361 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3362                                  int attr)
3363 {
3364         struct nlattr *rate;
3365         u32 bitrate;
3366         u16 bitrate_compat;
3367
3368         rate = nla_nest_start(msg, attr);
3369         if (!rate)
3370                 return false;
3371
3372         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3373         bitrate = cfg80211_calculate_bitrate(info);
3374         /* report 16-bit bitrate only if we can */
3375         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3376         if (bitrate > 0 &&
3377             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3378                 return false;
3379         if (bitrate_compat > 0 &&
3380             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3381                 return false;
3382
3383         if (info->flags & RATE_INFO_FLAGS_MCS) {
3384                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3385                         return false;
3386                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3387                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3388                         return false;
3389                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3390                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3391                         return false;
3392         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3393                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3394                         return false;
3395                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3396                         return false;
3397                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3398                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3399                         return false;
3400                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3401                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3402                         return false;
3403                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3404                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3405                         return false;
3406                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3407                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3408                         return false;
3409                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3410                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3411                         return false;
3412         }
3413
3414         nla_nest_end(msg, rate);
3415         return true;
3416 }
3417
3418 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3419                                int id)
3420 {
3421         void *attr;
3422         int i = 0;
3423
3424         if (!mask)
3425                 return true;
3426
3427         attr = nla_nest_start(msg, id);
3428         if (!attr)
3429                 return false;
3430
3431         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3432                 if (!(mask & BIT(i)))
3433                         continue;
3434
3435                 if (nla_put_u8(msg, i, signal[i]))
3436                         return false;
3437         }
3438
3439         nla_nest_end(msg, attr);
3440
3441         return true;
3442 }
3443
3444 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3445                                 int flags,
3446                                 struct cfg80211_registered_device *rdev,
3447                                 struct net_device *dev,
3448                                 const u8 *mac_addr, struct station_info *sinfo)
3449 {
3450         void *hdr;
3451         struct nlattr *sinfoattr, *bss_param;
3452
3453         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3454         if (!hdr)
3455                 return -1;
3456
3457         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3458             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3459             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3460                 goto nla_put_failure;
3461
3462         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3463         if (!sinfoattr)
3464                 goto nla_put_failure;
3465         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3466             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3467                         sinfo->connected_time))
3468                 goto nla_put_failure;
3469         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3470             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3471                         sinfo->inactive_time))
3472                 goto nla_put_failure;
3473         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3474                               STATION_INFO_RX_BYTES64)) &&
3475             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3476                         (u32)sinfo->rx_bytes))
3477                 goto nla_put_failure;
3478         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3479                               STATION_INFO_TX_BYTES64)) &&
3480             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3481                         (u32)sinfo->tx_bytes))
3482                 goto nla_put_failure;
3483         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3484             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3485                         sinfo->rx_bytes))
3486                 goto nla_put_failure;
3487         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3488             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3489                         sinfo->tx_bytes))
3490                 goto nla_put_failure;
3491         if ((sinfo->filled & STATION_INFO_LLID) &&
3492             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3493                 goto nla_put_failure;
3494         if ((sinfo->filled & STATION_INFO_PLID) &&
3495             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3496                 goto nla_put_failure;
3497         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3498             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3499                        sinfo->plink_state))
3500                 goto nla_put_failure;
3501         switch (rdev->wiphy.signal_type) {
3502         case CFG80211_SIGNAL_TYPE_MBM:
3503                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3504                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3505                                sinfo->signal))
3506                         goto nla_put_failure;
3507                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3508                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3509                                sinfo->signal_avg))
3510                         goto nla_put_failure;
3511                 break;
3512         default:
3513                 break;
3514         }
3515         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3516                 if (!nl80211_put_signal(msg, sinfo->chains,
3517                                         sinfo->chain_signal,
3518                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3519                         goto nla_put_failure;
3520         }
3521         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3522                 if (!nl80211_put_signal(msg, sinfo->chains,
3523                                         sinfo->chain_signal_avg,
3524                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3525                         goto nla_put_failure;
3526         }
3527         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3528                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3529                                           NL80211_STA_INFO_TX_BITRATE))
3530                         goto nla_put_failure;
3531         }
3532         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3533                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3534                                           NL80211_STA_INFO_RX_BITRATE))
3535                         goto nla_put_failure;
3536         }
3537         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3538             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3539                         sinfo->rx_packets))
3540                 goto nla_put_failure;
3541         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3542             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3543                         sinfo->tx_packets))
3544                 goto nla_put_failure;
3545         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3546             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3547                         sinfo->tx_retries))
3548                 goto nla_put_failure;
3549         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3550             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3551                         sinfo->tx_failed))
3552                 goto nla_put_failure;
3553         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3554             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3555                         sinfo->beacon_loss_count))
3556                 goto nla_put_failure;
3557         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3558             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3559                         sinfo->local_pm))
3560                 goto nla_put_failure;
3561         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3562             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3563                         sinfo->peer_pm))
3564                 goto nla_put_failure;
3565         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3566             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3567                         sinfo->nonpeer_pm))
3568                 goto nla_put_failure;
3569         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3570                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3571                 if (!bss_param)
3572                         goto nla_put_failure;
3573
3574                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3575                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3576                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3577                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3578                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3579                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3580                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3581                                sinfo->bss_param.dtim_period) ||
3582                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3583                                 sinfo->bss_param.beacon_interval))
3584                         goto nla_put_failure;
3585
3586                 nla_nest_end(msg, bss_param);
3587         }
3588         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3589             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3590                     sizeof(struct nl80211_sta_flag_update),
3591                     &sinfo->sta_flags))
3592                 goto nla_put_failure;
3593         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3594                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3595                             sinfo->t_offset))
3596                 goto nla_put_failure;
3597         nla_nest_end(msg, sinfoattr);
3598
3599         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3600             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3601                     sinfo->assoc_req_ies))
3602                 goto nla_put_failure;
3603
3604         return genlmsg_end(msg, hdr);
3605
3606  nla_put_failure:
3607         genlmsg_cancel(msg, hdr);
3608         return -EMSGSIZE;
3609 }
3610
3611 static int nl80211_dump_station(struct sk_buff *skb,
3612                                 struct netlink_callback *cb)
3613 {
3614         struct station_info sinfo;
3615         struct cfg80211_registered_device *dev;
3616         struct wireless_dev *wdev;
3617         u8 mac_addr[ETH_ALEN];
3618         int sta_idx = cb->args[2];
3619         int err;
3620
3621         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3622         if (err)
3623                 return err;
3624
3625         if (!wdev->netdev) {
3626                 err = -EINVAL;
3627                 goto out_err;
3628         }
3629
3630         if (!dev->ops->dump_station) {
3631                 err = -EOPNOTSUPP;
3632                 goto out_err;
3633         }
3634
3635         while (1) {
3636                 memset(&sinfo, 0, sizeof(sinfo));
3637                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3638                                         mac_addr, &sinfo);
3639                 if (err == -ENOENT)
3640                         break;
3641                 if (err)
3642                         goto out_err;
3643
3644                 if (nl80211_send_station(skb,
3645                                 NETLINK_CB(cb->skb).portid,
3646                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3647                                 dev, wdev->netdev, mac_addr,
3648                                 &sinfo) < 0)
3649                         goto out;
3650
3651                 sta_idx++;
3652         }
3653
3654
3655  out:
3656         cb->args[2] = sta_idx;
3657         err = skb->len;
3658  out_err:
3659         nl80211_finish_wdev_dump(dev);
3660
3661         return err;
3662 }
3663
3664 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3665 {
3666         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3667         struct net_device *dev = info->user_ptr[1];
3668         struct station_info sinfo;
3669         struct sk_buff *msg;
3670         u8 *mac_addr = NULL;
3671         int err;
3672
3673         memset(&sinfo, 0, sizeof(sinfo));
3674
3675         if (!info->attrs[NL80211_ATTR_MAC])
3676                 return -EINVAL;
3677
3678         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3679
3680         if (!rdev->ops->get_station)
3681                 return -EOPNOTSUPP;
3682
3683         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3684         if (err)
3685                 return err;
3686
3687         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3688         if (!msg)
3689                 return -ENOMEM;
3690
3691         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3692                                  rdev, dev, mac_addr, &sinfo) < 0) {
3693                 nlmsg_free(msg);
3694                 return -ENOBUFS;
3695         }
3696
3697         return genlmsg_reply(msg, info);
3698 }
3699
3700 int cfg80211_check_station_change(struct wiphy *wiphy,
3701                                   struct station_parameters *params,
3702                                   enum cfg80211_station_type statype)
3703 {
3704         if (params->listen_interval != -1)
3705                 return -EINVAL;
3706         if (params->aid)
3707                 return -EINVAL;
3708
3709         /* When you run into this, adjust the code below for the new flag */
3710         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3711
3712         switch (statype) {
3713         case CFG80211_STA_MESH_PEER_KERNEL:
3714         case CFG80211_STA_MESH_PEER_USER:
3715                 /*
3716                  * No ignoring the TDLS flag here -- the userspace mesh
3717                  * code doesn't have the bug of including TDLS in the
3718                  * mask everywhere.
3719                  */
3720                 if (params->sta_flags_mask &
3721                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3722                                   BIT(NL80211_STA_FLAG_MFP) |
3723                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3724                         return -EINVAL;
3725                 break;
3726         case CFG80211_STA_TDLS_PEER_SETUP:
3727         case CFG80211_STA_TDLS_PEER_ACTIVE:
3728                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3729                         return -EINVAL;
3730                 /* ignore since it can't change */
3731                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3732                 break;
3733         default:
3734                 /* disallow mesh-specific things */
3735                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3736                         return -EINVAL;
3737                 if (params->local_pm)
3738                         return -EINVAL;
3739                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3740                         return -EINVAL;
3741         }
3742
3743         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3744             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3745                 /* TDLS can't be set, ... */
3746                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3747                         return -EINVAL;
3748                 /*
3749                  * ... but don't bother the driver with it. This works around
3750                  * a hostapd/wpa_supplicant issue -- it always includes the
3751                  * TLDS_PEER flag in the mask even for AP mode.
3752                  */
3753                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3754         }
3755
3756         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3757                 /* reject other things that can't change */
3758                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3759                         return -EINVAL;
3760                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3761                         return -EINVAL;
3762                 if (params->supported_rates)
3763                         return -EINVAL;
3764                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3765                         return -EINVAL;
3766         }
3767
3768         if (statype != CFG80211_STA_AP_CLIENT) {
3769                 if (params->vlan)
3770                         return -EINVAL;
3771         }
3772
3773         switch (statype) {
3774         case CFG80211_STA_AP_MLME_CLIENT:
3775                 /* Use this only for authorizing/unauthorizing a station */
3776                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3777                         return -EOPNOTSUPP;
3778                 break;
3779         case CFG80211_STA_AP_CLIENT:
3780                 /* accept only the listed bits */
3781                 if (params->sta_flags_mask &
3782                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3783                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3784                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3785                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3786                                   BIT(NL80211_STA_FLAG_WME) |
3787                                   BIT(NL80211_STA_FLAG_MFP)))
3788                         return -EINVAL;
3789
3790                 /* but authenticated/associated only if driver handles it */
3791                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3792                     params->sta_flags_mask &
3793                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3794                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3795                         return -EINVAL;
3796                 break;
3797         case CFG80211_STA_IBSS:
3798         case CFG80211_STA_AP_STA:
3799                 /* reject any changes other than AUTHORIZED */
3800                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3801                         return -EINVAL;
3802                 break;
3803         case CFG80211_STA_TDLS_PEER_SETUP:
3804                 /* reject any changes other than AUTHORIZED or WME */
3805                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3806                                                BIT(NL80211_STA_FLAG_WME)))
3807                         return -EINVAL;
3808                 /* force (at least) rates when authorizing */
3809                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3810                     !params->supported_rates)
3811                         return -EINVAL;
3812                 break;
3813         case CFG80211_STA_TDLS_PEER_ACTIVE:
3814                 /* reject any changes */
3815                 return -EINVAL;
3816         case CFG80211_STA_MESH_PEER_KERNEL:
3817                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3818                         return -EINVAL;
3819                 break;
3820         case CFG80211_STA_MESH_PEER_USER:
3821                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3822                         return -EINVAL;
3823                 break;
3824         }
3825
3826         return 0;
3827 }
3828 EXPORT_SYMBOL(cfg80211_check_station_change);
3829
3830 /*
3831  * Get vlan interface making sure it is running and on the right wiphy.
3832  */
3833 static struct net_device *get_vlan(struct genl_info *info,
3834                                    struct cfg80211_registered_device *rdev)
3835 {
3836         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3837         struct net_device *v;
3838         int ret;
3839
3840         if (!vlanattr)
3841                 return NULL;
3842
3843         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3844         if (!v)
3845                 return ERR_PTR(-ENODEV);
3846
3847         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3848                 ret = -EINVAL;
3849                 goto error;
3850         }
3851
3852         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3853             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3854             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3855                 ret = -EINVAL;
3856                 goto error;
3857         }
3858
3859         if (!netif_running(v)) {
3860                 ret = -ENETDOWN;
3861                 goto error;
3862         }
3863
3864         return v;
3865  error:
3866         dev_put(v);
3867         return ERR_PTR(ret);
3868 }
3869
3870 static struct nla_policy
3871 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3872         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3873         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3874 };
3875
3876 static int nl80211_parse_sta_wme(struct genl_info *info,
3877                                  struct station_parameters *params)
3878 {
3879         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3880         struct nlattr *nla;
3881         int err;
3882
3883         /* parse WME attributes if present */
3884         if (!info->attrs[NL80211_ATTR_STA_WME])
3885                 return 0;
3886
3887         nla = info->attrs[NL80211_ATTR_STA_WME];
3888         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3889                                nl80211_sta_wme_policy);
3890         if (err)
3891                 return err;
3892
3893         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3894                 params->uapsd_queues = nla_get_u8(
3895                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3896         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3897                 return -EINVAL;
3898
3899         if (tb[NL80211_STA_WME_MAX_SP])
3900                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3901
3902         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3903                 return -EINVAL;
3904
3905         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3906
3907         return 0;
3908 }
3909
3910 static int nl80211_parse_sta_channel_info(struct genl_info *info,
3911                                       struct station_parameters *params)
3912 {
3913         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
3914                 params->supported_channels =
3915                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3916                 params->supported_channels_len =
3917                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3918                 /*
3919                  * Need to include at least one (first channel, number of
3920                  * channels) tuple for each subband, and must have proper
3921                  * tuples for the rest of the data as well.
3922                  */
3923                 if (params->supported_channels_len < 2)
3924                         return -EINVAL;
3925                 if (params->supported_channels_len % 2)
3926                         return -EINVAL;
3927         }
3928
3929         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
3930                 params->supported_oper_classes =
3931                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3932                 params->supported_oper_classes_len =
3933                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3934                 /*
3935                  * The value of the Length field of the Supported Operating
3936                  * Classes element is between 2 and 253.
3937                  */
3938                 if (params->supported_oper_classes_len < 2 ||
3939                     params->supported_oper_classes_len > 253)
3940                         return -EINVAL;
3941         }
3942         return 0;
3943 }
3944
3945 static int nl80211_set_station_tdls(struct genl_info *info,
3946                                     struct station_parameters *params)
3947 {
3948         int err;
3949         /* Dummy STA entry gets updated once the peer capabilities are known */
3950         if (info->attrs[NL80211_ATTR_PEER_AID])
3951                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3952         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3953                 params->ht_capa =
3954                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3955         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3956                 params->vht_capa =
3957                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3958
3959         err = nl80211_parse_sta_channel_info(info, params);
3960         if (err)
3961                 return err;
3962
3963         return nl80211_parse_sta_wme(info, params);
3964 }
3965
3966 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3967 {
3968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3969         struct net_device *dev = info->user_ptr[1];
3970         struct station_parameters params;
3971         u8 *mac_addr;
3972         int err;
3973
3974         memset(&params, 0, sizeof(params));
3975
3976         params.listen_interval = -1;
3977
3978         if (!rdev->ops->change_station)
3979                 return -EOPNOTSUPP;
3980
3981         if (info->attrs[NL80211_ATTR_STA_AID])
3982                 return -EINVAL;
3983
3984         if (!info->attrs[NL80211_ATTR_MAC])
3985                 return -EINVAL;
3986
3987         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3988
3989         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3990                 params.supported_rates =
3991                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3992                 params.supported_rates_len =
3993                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3994         }
3995
3996         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3997                 params.capability =
3998                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3999                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4000         }
4001
4002         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4003                 params.ext_capab =
4004                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4005                 params.ext_capab_len =
4006                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4007         }
4008
4009         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4010                 return -EINVAL;
4011
4012         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4013                 return -EINVAL;
4014
4015         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4016                 params.plink_action =
4017                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4018                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4019                         return -EINVAL;
4020         }
4021
4022         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4023                 params.plink_state =
4024                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4025                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4026                         return -EINVAL;
4027                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4028         }
4029
4030         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4031                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4032                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4033
4034                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4035                     pm > NL80211_MESH_POWER_MAX)
4036                         return -EINVAL;
4037
4038                 params.local_pm = pm;
4039         }
4040
4041         /* Include parameters for TDLS peer (will check later) */
4042         err = nl80211_set_station_tdls(info, &params);
4043         if (err)
4044                 return err;
4045
4046         params.vlan = get_vlan(info, rdev);
4047         if (IS_ERR(params.vlan))
4048                 return PTR_ERR(params.vlan);
4049
4050         switch (dev->ieee80211_ptr->iftype) {
4051         case NL80211_IFTYPE_AP:
4052         case NL80211_IFTYPE_AP_VLAN:
4053         case NL80211_IFTYPE_P2P_GO:
4054         case NL80211_IFTYPE_P2P_CLIENT:
4055         case NL80211_IFTYPE_STATION:
4056         case NL80211_IFTYPE_ADHOC:
4057         case NL80211_IFTYPE_MESH_POINT:
4058                 break;
4059         default:
4060                 err = -EOPNOTSUPP;
4061                 goto out_put_vlan;
4062         }
4063
4064         /* driver will call cfg80211_check_station_change() */
4065         err = rdev_change_station(rdev, dev, mac_addr, &params);
4066
4067  out_put_vlan:
4068         if (params.vlan)
4069                 dev_put(params.vlan);
4070
4071         return err;
4072 }
4073
4074 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4075 {
4076         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4077         int err;
4078         struct net_device *dev = info->user_ptr[1];
4079         struct station_parameters params;
4080         u8 *mac_addr = NULL;
4081
4082         memset(&params, 0, sizeof(params));
4083
4084         if (!rdev->ops->add_station)
4085                 return -EOPNOTSUPP;
4086
4087         if (!info->attrs[NL80211_ATTR_MAC])
4088                 return -EINVAL;
4089
4090         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4091                 return -EINVAL;
4092
4093         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4094                 return -EINVAL;
4095
4096         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4097             !info->attrs[NL80211_ATTR_PEER_AID])
4098                 return -EINVAL;
4099
4100         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4101         params.supported_rates =
4102                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4103         params.supported_rates_len =
4104                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4105         params.listen_interval =
4106                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4107
4108         if (info->attrs[NL80211_ATTR_PEER_AID])
4109                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4110         else
4111                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4112         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4113                 return -EINVAL;
4114
4115         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4116                 params.capability =
4117                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4118                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4119         }
4120
4121         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4122                 params.ext_capab =
4123                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4124                 params.ext_capab_len =
4125                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4126         }
4127
4128         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4129                 params.ht_capa =
4130                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4131
4132         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4133                 params.vht_capa =
4134                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4135
4136         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4137                 params.opmode_notif_used = true;
4138                 params.opmode_notif =
4139                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4140         }
4141
4142         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4143                 params.plink_action =
4144                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4145                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4146                         return -EINVAL;
4147         }
4148
4149         err = nl80211_parse_sta_channel_info(info, &params);
4150         if (err)
4151                 return err;
4152
4153         err = nl80211_parse_sta_wme(info, &params);
4154         if (err)
4155                 return err;
4156
4157         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4158                 return -EINVAL;
4159
4160         /* When you run into this, adjust the code below for the new flag */
4161         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4162
4163         switch (dev->ieee80211_ptr->iftype) {
4164         case NL80211_IFTYPE_AP:
4165         case NL80211_IFTYPE_AP_VLAN:
4166         case NL80211_IFTYPE_P2P_GO:
4167                 /* ignore WME attributes if iface/sta is not capable */
4168                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4169                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4170                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4171
4172                 /* TDLS peers cannot be added */
4173                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4174                     info->attrs[NL80211_ATTR_PEER_AID])
4175                         return -EINVAL;
4176                 /* but don't bother the driver with it */
4177                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4178
4179                 /* allow authenticated/associated only if driver handles it */
4180                 if (!(rdev->wiphy.features &
4181                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4182                     params.sta_flags_mask &
4183                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4184                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4185                         return -EINVAL;
4186
4187                 /* must be last in here for error handling */
4188                 params.vlan = get_vlan(info, rdev);
4189                 if (IS_ERR(params.vlan))
4190                         return PTR_ERR(params.vlan);
4191                 break;
4192         case NL80211_IFTYPE_MESH_POINT:
4193                 /* ignore uAPSD data */
4194                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4195
4196                 /* associated is disallowed */
4197                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4198                         return -EINVAL;
4199                 /* TDLS peers cannot be added */
4200                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4201                     info->attrs[NL80211_ATTR_PEER_AID])
4202                         return -EINVAL;
4203                 break;
4204         case NL80211_IFTYPE_STATION:
4205         case NL80211_IFTYPE_P2P_CLIENT:
4206                 /* ignore uAPSD data */
4207                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4208
4209                 /* these are disallowed */
4210                 if (params.sta_flags_mask &
4211                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4212                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4213                         return -EINVAL;
4214                 /* Only TDLS peers can be added */
4215                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4216                         return -EINVAL;
4217                 /* Can only add if TDLS ... */
4218                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4219                         return -EOPNOTSUPP;
4220                 /* ... with external setup is supported */
4221                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4222                         return -EOPNOTSUPP;
4223                 /*
4224                  * Older wpa_supplicant versions always mark the TDLS peer
4225                  * as authorized, but it shouldn't yet be.
4226                  */
4227                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4228                 break;
4229         default:
4230                 return -EOPNOTSUPP;
4231         }
4232
4233         /* be aware of params.vlan when changing code here */
4234
4235         err = rdev_add_station(rdev, dev, mac_addr, &params);
4236
4237         if (params.vlan)
4238                 dev_put(params.vlan);
4239         return err;
4240 }
4241
4242 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4243 {
4244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4245         struct net_device *dev = info->user_ptr[1];
4246         u8 *mac_addr = NULL;
4247
4248         if (info->attrs[NL80211_ATTR_MAC])
4249                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4250
4251         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4252             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4253             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4254             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4255                 return -EINVAL;
4256
4257         if (!rdev->ops->del_station)
4258                 return -EOPNOTSUPP;
4259
4260         return rdev_del_station(rdev, dev, mac_addr);
4261 }
4262
4263 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4264                                 int flags, struct net_device *dev,
4265                                 u8 *dst, u8 *next_hop,
4266                                 struct mpath_info *pinfo)
4267 {
4268         void *hdr;
4269         struct nlattr *pinfoattr;
4270
4271         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4272         if (!hdr)
4273                 return -1;
4274
4275         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4276             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4277             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4278             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4279                 goto nla_put_failure;
4280
4281         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4282         if (!pinfoattr)
4283                 goto nla_put_failure;
4284         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4285             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4286                         pinfo->frame_qlen))
4287                 goto nla_put_failure;
4288         if (((pinfo->filled & MPATH_INFO_SN) &&
4289              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4290             ((pinfo->filled & MPATH_INFO_METRIC) &&
4291              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4292                          pinfo->metric)) ||
4293             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4294              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4295                          pinfo->exptime)) ||
4296             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4297              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4298                         pinfo->flags)) ||
4299             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4300              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4301                          pinfo->discovery_timeout)) ||
4302             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4303              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4304                         pinfo->discovery_retries)))
4305                 goto nla_put_failure;
4306
4307         nla_nest_end(msg, pinfoattr);
4308
4309         return genlmsg_end(msg, hdr);
4310
4311  nla_put_failure:
4312         genlmsg_cancel(msg, hdr);
4313         return -EMSGSIZE;
4314 }
4315
4316 static int nl80211_dump_mpath(struct sk_buff *skb,
4317                               struct netlink_callback *cb)
4318 {
4319         struct mpath_info pinfo;
4320         struct cfg80211_registered_device *dev;
4321         struct wireless_dev *wdev;
4322         u8 dst[ETH_ALEN];
4323         u8 next_hop[ETH_ALEN];
4324         int path_idx = cb->args[2];
4325         int err;
4326
4327         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4328         if (err)
4329                 return err;
4330
4331         if (!dev->ops->dump_mpath) {
4332                 err = -EOPNOTSUPP;
4333                 goto out_err;
4334         }
4335
4336         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4337                 err = -EOPNOTSUPP;
4338                 goto out_err;
4339         }
4340
4341         while (1) {
4342                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4343                                       next_hop, &pinfo);
4344                 if (err == -ENOENT)
4345                         break;
4346                 if (err)
4347                         goto out_err;
4348
4349                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4350                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4351                                        wdev->netdev, dst, next_hop,
4352                                        &pinfo) < 0)
4353                         goto out;
4354
4355                 path_idx++;
4356         }
4357
4358
4359  out:
4360         cb->args[2] = path_idx;
4361         err = skb->len;
4362  out_err:
4363         nl80211_finish_wdev_dump(dev);
4364         return err;
4365 }
4366
4367 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4368 {
4369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4370         int err;
4371         struct net_device *dev = info->user_ptr[1];
4372         struct mpath_info pinfo;
4373         struct sk_buff *msg;
4374         u8 *dst = NULL;
4375         u8 next_hop[ETH_ALEN];
4376
4377         memset(&pinfo, 0, sizeof(pinfo));
4378
4379         if (!info->attrs[NL80211_ATTR_MAC])
4380                 return -EINVAL;
4381
4382         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4383
4384         if (!rdev->ops->get_mpath)
4385                 return -EOPNOTSUPP;
4386
4387         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4388                 return -EOPNOTSUPP;
4389
4390         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4391         if (err)
4392                 return err;
4393
4394         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4395         if (!msg)
4396                 return -ENOMEM;
4397
4398         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4399                                  dev, dst, next_hop, &pinfo) < 0) {
4400                 nlmsg_free(msg);
4401                 return -ENOBUFS;
4402         }
4403
4404         return genlmsg_reply(msg, info);
4405 }
4406
4407 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4408 {
4409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4410         struct net_device *dev = info->user_ptr[1];
4411         u8 *dst = NULL;
4412         u8 *next_hop = NULL;
4413
4414         if (!info->attrs[NL80211_ATTR_MAC])
4415                 return -EINVAL;
4416
4417         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4418                 return -EINVAL;
4419
4420         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4421         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4422
4423         if (!rdev->ops->change_mpath)
4424                 return -EOPNOTSUPP;
4425
4426         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4427                 return -EOPNOTSUPP;
4428
4429         return rdev_change_mpath(rdev, dev, dst, next_hop);
4430 }
4431
4432 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4433 {
4434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4435         struct net_device *dev = info->user_ptr[1];
4436         u8 *dst = NULL;
4437         u8 *next_hop = NULL;
4438
4439         if (!info->attrs[NL80211_ATTR_MAC])
4440                 return -EINVAL;
4441
4442         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4443                 return -EINVAL;
4444
4445         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4446         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4447
4448         if (!rdev->ops->add_mpath)
4449                 return -EOPNOTSUPP;
4450
4451         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4452                 return -EOPNOTSUPP;
4453
4454         return rdev_add_mpath(rdev, dev, dst, next_hop);
4455 }
4456
4457 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4458 {
4459         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4460         struct net_device *dev = info->user_ptr[1];
4461         u8 *dst = NULL;
4462
4463         if (info->attrs[NL80211_ATTR_MAC])
4464                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4465
4466         if (!rdev->ops->del_mpath)
4467                 return -EOPNOTSUPP;
4468
4469         return rdev_del_mpath(rdev, dev, dst);
4470 }
4471
4472 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4473 {
4474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4475         struct net_device *dev = info->user_ptr[1];
4476         struct wireless_dev *wdev = dev->ieee80211_ptr;
4477         struct bss_parameters params;
4478         int err;
4479
4480         memset(&params, 0, sizeof(params));
4481         /* default to not changing parameters */
4482         params.use_cts_prot = -1;
4483         params.use_short_preamble = -1;
4484         params.use_short_slot_time = -1;
4485         params.ap_isolate = -1;
4486         params.ht_opmode = -1;
4487         params.p2p_ctwindow = -1;
4488         params.p2p_opp_ps = -1;
4489
4490         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4491                 params.use_cts_prot =
4492                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4493         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4494                 params.use_short_preamble =
4495                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4496         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4497                 params.use_short_slot_time =
4498                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4499         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4500                 params.basic_rates =
4501                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4502                 params.basic_rates_len =
4503                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4504         }
4505         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4506                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4507         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4508                 params.ht_opmode =
4509                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4510
4511         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4512                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4513                         return -EINVAL;
4514                 params.p2p_ctwindow =
4515                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4516                 if (params.p2p_ctwindow < 0)
4517                         return -EINVAL;
4518                 if (params.p2p_ctwindow != 0 &&
4519                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4520                         return -EINVAL;
4521         }
4522
4523         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4524                 u8 tmp;
4525
4526                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4527                         return -EINVAL;
4528                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4529                 if (tmp > 1)
4530                         return -EINVAL;
4531                 params.p2p_opp_ps = tmp;
4532                 if (params.p2p_opp_ps &&
4533                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4534                         return -EINVAL;
4535         }
4536
4537         if (!rdev->ops->change_bss)
4538                 return -EOPNOTSUPP;
4539
4540         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4541             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4542                 return -EOPNOTSUPP;
4543
4544         wdev_lock(wdev);
4545         err = rdev_change_bss(rdev, dev, &params);
4546         wdev_unlock(wdev);
4547
4548         return err;
4549 }
4550
4551 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4552         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4553         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4554         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4555         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4556         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4557         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4558 };
4559
4560 static int parse_reg_rule(struct nlattr *tb[],
4561         struct ieee80211_reg_rule *reg_rule)
4562 {
4563         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4564         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4565
4566         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4567                 return -EINVAL;
4568         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4569                 return -EINVAL;
4570         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4571                 return -EINVAL;
4572         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4573                 return -EINVAL;
4574         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4575                 return -EINVAL;
4576
4577         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4578
4579         freq_range->start_freq_khz =
4580                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4581         freq_range->end_freq_khz =
4582                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4583         freq_range->max_bandwidth_khz =
4584                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4585
4586         power_rule->max_eirp =
4587                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4588
4589         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4590                 power_rule->max_antenna_gain =
4591                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4592
4593         return 0;
4594 }
4595
4596 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4597 {
4598         int r;
4599         char *data = NULL;
4600         enum nl80211_user_reg_hint_type user_reg_hint_type;
4601
4602         /*
4603          * You should only get this when cfg80211 hasn't yet initialized
4604          * completely when built-in to the kernel right between the time
4605          * window between nl80211_init() and regulatory_init(), if that is
4606          * even possible.
4607          */
4608         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4609                 return -EINPROGRESS;
4610
4611         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4612                 return -EINVAL;
4613
4614         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4615
4616         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4617                 user_reg_hint_type =
4618                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4619         else
4620                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4621
4622         switch (user_reg_hint_type) {
4623         case NL80211_USER_REG_HINT_USER:
4624         case NL80211_USER_REG_HINT_CELL_BASE:
4625                 break;
4626         default:
4627                 return -EINVAL;
4628         }
4629
4630         r = regulatory_hint_user(data, user_reg_hint_type);
4631
4632         return r;
4633 }
4634
4635 static int nl80211_get_mesh_config(struct sk_buff *skb,
4636                                    struct genl_info *info)
4637 {
4638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4639         struct net_device *dev = info->user_ptr[1];
4640         struct wireless_dev *wdev = dev->ieee80211_ptr;
4641         struct mesh_config cur_params;
4642         int err = 0;
4643         void *hdr;
4644         struct nlattr *pinfoattr;
4645         struct sk_buff *msg;
4646
4647         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4648                 return -EOPNOTSUPP;
4649
4650         if (!rdev->ops->get_mesh_config)
4651                 return -EOPNOTSUPP;
4652
4653         wdev_lock(wdev);
4654         /* If not connected, get default parameters */
4655         if (!wdev->mesh_id_len)
4656                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4657         else
4658                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4659         wdev_unlock(wdev);
4660
4661         if (err)
4662                 return err;
4663
4664         /* Draw up a netlink message to send back */
4665         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4666         if (!msg)
4667                 return -ENOMEM;
4668         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4669                              NL80211_CMD_GET_MESH_CONFIG);
4670         if (!hdr)
4671                 goto out;
4672         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4673         if (!pinfoattr)
4674                 goto nla_put_failure;
4675         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4676             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4677                         cur_params.dot11MeshRetryTimeout) ||
4678             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4679                         cur_params.dot11MeshConfirmTimeout) ||
4680             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4681                         cur_params.dot11MeshHoldingTimeout) ||
4682             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4683                         cur_params.dot11MeshMaxPeerLinks) ||
4684             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4685                        cur_params.dot11MeshMaxRetries) ||
4686             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4687                        cur_params.dot11MeshTTL) ||
4688             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4689                        cur_params.element_ttl) ||
4690             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4691                        cur_params.auto_open_plinks) ||
4692             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4693                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4694             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4695                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4696             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4697                         cur_params.path_refresh_time) ||
4698             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4699                         cur_params.min_discovery_timeout) ||
4700             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4701                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4702             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4703                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4704             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4705                         cur_params.dot11MeshHWMPperrMinInterval) ||
4706             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4707                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4708             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4709                        cur_params.dot11MeshHWMPRootMode) ||
4710             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4711                         cur_params.dot11MeshHWMPRannInterval) ||
4712             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4713                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4714             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4715                        cur_params.dot11MeshForwarding) ||
4716             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4717                         cur_params.rssi_threshold) ||
4718             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4719                         cur_params.ht_opmode) ||
4720             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4721                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4722             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4723                         cur_params.dot11MeshHWMProotInterval) ||
4724             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4725                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4726             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4727                         cur_params.power_mode) ||
4728             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4729                         cur_params.dot11MeshAwakeWindowDuration) ||
4730             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4731                         cur_params.plink_timeout))
4732                 goto nla_put_failure;
4733         nla_nest_end(msg, pinfoattr);
4734         genlmsg_end(msg, hdr);
4735         return genlmsg_reply(msg, info);
4736
4737  nla_put_failure:
4738         genlmsg_cancel(msg, hdr);
4739  out:
4740         nlmsg_free(msg);
4741         return -ENOBUFS;
4742 }
4743
4744 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4745         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4746         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4747         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4748         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4749         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4750         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4751         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4752         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4753         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4754         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4755         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4756         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4757         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4758         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4759         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4760         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4761         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4762         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4763         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4764         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4765         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4766         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4767         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4768         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4769         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4770         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4771         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4772         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4773 };
4774
4775 static const struct nla_policy
4776         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4777         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4778         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4779         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4780         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4781         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4782         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4783         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4784                                     .len = IEEE80211_MAX_DATA_LEN },
4785         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4786 };
4787
4788 static int nl80211_parse_mesh_config(struct genl_info *info,
4789                                      struct mesh_config *cfg,
4790                                      u32 *mask_out)
4791 {
4792         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4793         u32 mask = 0;
4794
4795 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4796 do {                                                                        \
4797         if (tb[attr]) {                                                     \
4798                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4799                         return -EINVAL;                                     \
4800                 cfg->param = fn(tb[attr]);                                  \
4801                 mask |= (1 << (attr - 1));                                  \
4802         }                                                                   \
4803 } while (0)
4804
4805
4806         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4807                 return -EINVAL;
4808         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4809                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4810                              nl80211_meshconf_params_policy))
4811                 return -EINVAL;
4812
4813         /* This makes sure that there aren't more than 32 mesh config
4814          * parameters (otherwise our bitfield scheme would not work.) */
4815         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4816
4817         /* Fill in the params struct */
4818         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4819                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4820                                   nla_get_u16);
4821         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4822                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4823                                   nla_get_u16);
4824         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4825                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4826                                   nla_get_u16);
4827         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4828                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4829                                   nla_get_u16);
4830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4831                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4832                                   nla_get_u8);
4833         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4834                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4835         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4836                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4837                                   nla_get_u8);
4838         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4839                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4840                                   nla_get_u8);
4841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4842                                   1, 255, mask,
4843                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4844                                   nla_get_u32);
4845         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4846                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4847                                   nla_get_u8);
4848         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4849                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4850                                   nla_get_u32);
4851         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4852                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4853                                   nla_get_u16);
4854         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4855                                   1, 65535, mask,
4856                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4857                                   nla_get_u32);
4858         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4859                                   1, 65535, mask,
4860                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4861                                   nla_get_u16);
4862         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4863                                   1, 65535, mask,
4864                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4865                                   nla_get_u16);
4866         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4867                                   dot11MeshHWMPnetDiameterTraversalTime,
4868                                   1, 65535, mask,
4869                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4870                                   nla_get_u16);
4871         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4872                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4873                                   nla_get_u8);
4874         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4875                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4876                                   nla_get_u16);
4877         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4878                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4879                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4880                                   nla_get_u8);
4881         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4882                                   mask, NL80211_MESHCONF_FORWARDING,
4883                                   nla_get_u8);
4884         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4885                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4886                                   nla_get_s32);
4887         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4888                                   mask, NL80211_MESHCONF_HT_OPMODE,
4889                                   nla_get_u16);
4890         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4891                                   1, 65535, mask,
4892                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4893                                   nla_get_u32);
4894         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4895                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4896                                   nla_get_u16);
4897         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4898                                   dot11MeshHWMPconfirmationInterval,
4899                                   1, 65535, mask,
4900                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4901                                   nla_get_u16);
4902         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4903                                   NL80211_MESH_POWER_ACTIVE,
4904                                   NL80211_MESH_POWER_MAX,
4905                                   mask, NL80211_MESHCONF_POWER_MODE,
4906                                   nla_get_u32);
4907         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4908                                   0, 65535, mask,
4909                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4910         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4911                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4912                                   nla_get_u32);
4913         if (mask_out)
4914                 *mask_out = mask;
4915
4916         return 0;
4917
4918 #undef FILL_IN_MESH_PARAM_IF_SET
4919 }
4920
4921 static int nl80211_parse_mesh_setup(struct genl_info *info,
4922                                      struct mesh_setup *setup)
4923 {
4924         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4925         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4926
4927         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4928                 return -EINVAL;
4929         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4930                              info->attrs[NL80211_ATTR_MESH_SETUP],
4931                              nl80211_mesh_setup_params_policy))
4932                 return -EINVAL;
4933
4934         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4935                 setup->sync_method =
4936                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4937                  IEEE80211_SYNC_METHOD_VENDOR :
4938                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4939
4940         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4941                 setup->path_sel_proto =
4942                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4943                  IEEE80211_PATH_PROTOCOL_VENDOR :
4944                  IEEE80211_PATH_PROTOCOL_HWMP;
4945
4946         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4947                 setup->path_metric =
4948                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4949                  IEEE80211_PATH_METRIC_VENDOR :
4950                  IEEE80211_PATH_METRIC_AIRTIME;
4951
4952
4953         if (tb[NL80211_MESH_SETUP_IE]) {
4954                 struct nlattr *ieattr =
4955                         tb[NL80211_MESH_SETUP_IE];
4956                 if (!is_valid_ie_attr(ieattr))
4957                         return -EINVAL;
4958                 setup->ie = nla_data(ieattr);
4959                 setup->ie_len = nla_len(ieattr);
4960         }
4961         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4962             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4963                 return -EINVAL;
4964         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4965         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4966         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4967         if (setup->is_secure)
4968                 setup->user_mpm = true;
4969
4970         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4971                 if (!setup->user_mpm)
4972                         return -EINVAL;
4973                 setup->auth_id =
4974                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4975         }
4976
4977         return 0;
4978 }
4979
4980 static int nl80211_update_mesh_config(struct sk_buff *skb,
4981                                       struct genl_info *info)
4982 {
4983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4984         struct net_device *dev = info->user_ptr[1];
4985         struct wireless_dev *wdev = dev->ieee80211_ptr;
4986         struct mesh_config cfg;
4987         u32 mask;
4988         int err;
4989
4990         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4991                 return -EOPNOTSUPP;
4992
4993         if (!rdev->ops->update_mesh_config)
4994                 return -EOPNOTSUPP;
4995
4996         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4997         if (err)
4998                 return err;
4999
5000         wdev_lock(wdev);
5001         if (!wdev->mesh_id_len)
5002                 err = -ENOLINK;
5003
5004         if (!err)
5005                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5006
5007         wdev_unlock(wdev);
5008
5009         return err;
5010 }
5011
5012 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5013 {
5014         const struct ieee80211_regdomain *regdom;
5015         struct sk_buff *msg;
5016         void *hdr = NULL;
5017         struct nlattr *nl_reg_rules;
5018         unsigned int i;
5019
5020         if (!cfg80211_regdomain)
5021                 return -EINVAL;
5022
5023         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5024         if (!msg)
5025                 return -ENOBUFS;
5026
5027         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5028                              NL80211_CMD_GET_REG);
5029         if (!hdr)
5030                 goto put_failure;
5031
5032         if (reg_last_request_cell_base() &&
5033             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5034                         NL80211_USER_REG_HINT_CELL_BASE))
5035                 goto nla_put_failure;
5036
5037         rcu_read_lock();
5038         regdom = rcu_dereference(cfg80211_regdomain);
5039
5040         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5041             (regdom->dfs_region &&
5042              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5043                 goto nla_put_failure_rcu;
5044
5045         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5046         if (!nl_reg_rules)
5047                 goto nla_put_failure_rcu;
5048
5049         for (i = 0; i < regdom->n_reg_rules; i++) {
5050                 struct nlattr *nl_reg_rule;
5051                 const struct ieee80211_reg_rule *reg_rule;
5052                 const struct ieee80211_freq_range *freq_range;
5053                 const struct ieee80211_power_rule *power_rule;
5054
5055                 reg_rule = &regdom->reg_rules[i];
5056                 freq_range = &reg_rule->freq_range;
5057                 power_rule = &reg_rule->power_rule;
5058
5059                 nl_reg_rule = nla_nest_start(msg, i);
5060                 if (!nl_reg_rule)
5061                         goto nla_put_failure_rcu;
5062
5063                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5064                                 reg_rule->flags) ||
5065                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5066                                 freq_range->start_freq_khz) ||
5067                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5068                                 freq_range->end_freq_khz) ||
5069                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5070                                 freq_range->max_bandwidth_khz) ||
5071                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5072                                 power_rule->max_antenna_gain) ||
5073                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5074                                 power_rule->max_eirp))
5075                         goto nla_put_failure_rcu;
5076
5077                 nla_nest_end(msg, nl_reg_rule);
5078         }
5079         rcu_read_unlock();
5080
5081         nla_nest_end(msg, nl_reg_rules);
5082
5083         genlmsg_end(msg, hdr);
5084         return genlmsg_reply(msg, info);
5085
5086 nla_put_failure_rcu:
5087         rcu_read_unlock();
5088 nla_put_failure:
5089         genlmsg_cancel(msg, hdr);
5090 put_failure:
5091         nlmsg_free(msg);
5092         return -EMSGSIZE;
5093 }
5094
5095 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5096 {
5097         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5098         struct nlattr *nl_reg_rule;
5099         char *alpha2 = NULL;
5100         int rem_reg_rules = 0, r = 0;
5101         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5102         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5103         struct ieee80211_regdomain *rd = NULL;
5104
5105         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5106                 return -EINVAL;
5107
5108         if (!info->attrs[NL80211_ATTR_REG_RULES])
5109                 return -EINVAL;
5110
5111         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5112
5113         if (info->attrs[NL80211_ATTR_DFS_REGION])
5114                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5115
5116         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5117                             rem_reg_rules) {
5118                 num_rules++;
5119                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5120                         return -EINVAL;
5121         }
5122
5123         if (!reg_is_valid_request(alpha2))
5124                 return -EINVAL;
5125
5126         size_of_regd = sizeof(struct ieee80211_regdomain) +
5127                        num_rules * sizeof(struct ieee80211_reg_rule);
5128
5129         rd = kzalloc(size_of_regd, GFP_KERNEL);
5130         if (!rd)
5131                 return -ENOMEM;
5132
5133         rd->n_reg_rules = num_rules;
5134         rd->alpha2[0] = alpha2[0];
5135         rd->alpha2[1] = alpha2[1];
5136
5137         /*
5138          * Disable DFS master mode if the DFS region was
5139          * not supported or known on this kernel.
5140          */
5141         if (reg_supported_dfs_region(dfs_region))
5142                 rd->dfs_region = dfs_region;
5143
5144         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5145                             rem_reg_rules) {
5146                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5147                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5148                           reg_rule_policy);
5149                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5150                 if (r)
5151                         goto bad_reg;
5152
5153                 rule_idx++;
5154
5155                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5156                         r = -EINVAL;
5157                         goto bad_reg;
5158                 }
5159         }
5160
5161         r = set_regdom(rd);
5162         /* set_regdom took ownership */
5163         rd = NULL;
5164
5165  bad_reg:
5166         kfree(rd);
5167         return r;
5168 }
5169
5170 static int validate_scan_freqs(struct nlattr *freqs)
5171 {
5172         struct nlattr *attr1, *attr2;
5173         int n_channels = 0, tmp1, tmp2;
5174
5175         nla_for_each_nested(attr1, freqs, tmp1) {
5176                 n_channels++;
5177                 /*
5178                  * Some hardware has a limited channel list for
5179                  * scanning, and it is pretty much nonsensical
5180                  * to scan for a channel twice, so disallow that
5181                  * and don't require drivers to check that the
5182                  * channel list they get isn't longer than what
5183                  * they can scan, as long as they can scan all
5184                  * the channels they registered at once.
5185                  */
5186                 nla_for_each_nested(attr2, freqs, tmp2)
5187                         if (attr1 != attr2 &&
5188                             nla_get_u32(attr1) == nla_get_u32(attr2))
5189                                 return 0;
5190         }
5191
5192         return n_channels;
5193 }
5194
5195 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5196 {
5197         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5198         struct wireless_dev *wdev = info->user_ptr[1];
5199         struct cfg80211_scan_request *request;
5200         struct nlattr *attr;
5201         struct wiphy *wiphy;
5202         int err, tmp, n_ssids = 0, n_channels, i;
5203         size_t ie_len;
5204
5205         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5206                 return -EINVAL;
5207
5208         wiphy = &rdev->wiphy;
5209
5210         if (!rdev->ops->scan)
5211                 return -EOPNOTSUPP;
5212
5213         if (rdev->scan_req) {
5214                 err = -EBUSY;
5215                 goto unlock;
5216         }
5217
5218         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5219                 n_channels = validate_scan_freqs(
5220                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5221                 if (!n_channels) {
5222                         err = -EINVAL;
5223                         goto unlock;
5224                 }
5225         } else {
5226                 enum ieee80211_band band;
5227                 n_channels = 0;
5228
5229                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5230                         if (wiphy->bands[band])
5231                                 n_channels += wiphy->bands[band]->n_channels;
5232         }
5233
5234         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5235                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5236                         n_ssids++;
5237
5238         if (n_ssids > wiphy->max_scan_ssids) {
5239                 err = -EINVAL;
5240                 goto unlock;
5241         }
5242
5243         if (info->attrs[NL80211_ATTR_IE])
5244                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5245         else
5246                 ie_len = 0;
5247
5248         if (ie_len > wiphy->max_scan_ie_len) {
5249                 err = -EINVAL;
5250                 goto unlock;
5251         }
5252
5253         request = kzalloc(sizeof(*request)
5254                         + sizeof(*request->ssids) * n_ssids
5255                         + sizeof(*request->channels) * n_channels
5256                         + ie_len, GFP_KERNEL);
5257         if (!request) {
5258                 err = -ENOMEM;
5259                 goto unlock;
5260         }
5261
5262         if (n_ssids)
5263                 request->ssids = (void *)&request->channels[n_channels];
5264         request->n_ssids = n_ssids;
5265         if (ie_len) {
5266                 if (request->ssids)
5267                         request->ie = (void *)(request->ssids + n_ssids);
5268                 else
5269                         request->ie = (void *)(request->channels + n_channels);
5270         }
5271
5272         i = 0;
5273         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5274                 /* user specified, bail out if channel not found */
5275                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5276                         struct ieee80211_channel *chan;
5277
5278                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5279
5280                         if (!chan) {
5281                                 err = -EINVAL;
5282                                 goto out_free;
5283                         }
5284
5285                         /* ignore disabled channels */
5286                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5287                                 continue;
5288
5289                         request->channels[i] = chan;
5290                         i++;
5291                 }
5292         } else {
5293                 enum ieee80211_band band;
5294
5295                 /* all channels */
5296                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5297                         int j;
5298                         if (!wiphy->bands[band])
5299                                 continue;
5300                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5301                                 struct ieee80211_channel *chan;
5302
5303                                 chan = &wiphy->bands[band]->channels[j];
5304
5305                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5306                                         continue;
5307
5308                                 request->channels[i] = chan;
5309                                 i++;
5310                         }
5311                 }
5312         }
5313
5314         if (!i) {
5315                 err = -EINVAL;
5316                 goto out_free;
5317         }
5318
5319         request->n_channels = i;
5320
5321         i = 0;
5322         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5323                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5324                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5325                                 err = -EINVAL;
5326                                 goto out_free;
5327                         }
5328                         request->ssids[i].ssid_len = nla_len(attr);
5329                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5330                         i++;
5331                 }
5332         }
5333
5334         if (info->attrs[NL80211_ATTR_IE]) {
5335                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5336                 memcpy((void *)request->ie,
5337                        nla_data(info->attrs[NL80211_ATTR_IE]),
5338                        request->ie_len);
5339         }
5340
5341         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5342                 if (wiphy->bands[i])
5343                         request->rates[i] =
5344                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5345
5346         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5347                 nla_for_each_nested(attr,
5348                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5349                                     tmp) {
5350                         enum ieee80211_band band = nla_type(attr);
5351
5352                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5353                                 err = -EINVAL;
5354                                 goto out_free;
5355                         }
5356                         err = ieee80211_get_ratemask(wiphy->bands[band],
5357                                                      nla_data(attr),
5358                                                      nla_len(attr),
5359                                                      &request->rates[band]);
5360                         if (err)
5361                                 goto out_free;
5362                 }
5363         }
5364
5365         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5366                 request->flags = nla_get_u32(
5367                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5368                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5369                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5370                         err = -EOPNOTSUPP;
5371                         goto out_free;
5372                 }
5373         }
5374
5375         request->no_cck =
5376                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5377
5378         request->wdev = wdev;
5379         request->wiphy = &rdev->wiphy;
5380         request->scan_start = jiffies;
5381
5382         rdev->scan_req = request;
5383         err = rdev_scan(rdev, request);
5384
5385         if (!err) {
5386                 nl80211_send_scan_start(rdev, wdev);
5387                 if (wdev->netdev)
5388                         dev_hold(wdev->netdev);
5389         } else {
5390  out_free:
5391                 rdev->scan_req = NULL;
5392                 kfree(request);
5393         }
5394
5395  unlock:
5396         return err;
5397 }
5398
5399 static int nl80211_start_sched_scan(struct sk_buff *skb,
5400                                     struct genl_info *info)
5401 {
5402         struct cfg80211_sched_scan_request *request;
5403         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5404         struct net_device *dev = info->user_ptr[1];
5405         struct nlattr *attr;
5406         struct wiphy *wiphy;
5407         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5408         u32 interval;
5409         enum ieee80211_band band;
5410         size_t ie_len;
5411         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5412
5413         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5414             !rdev->ops->sched_scan_start)
5415                 return -EOPNOTSUPP;
5416
5417         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5418                 return -EINVAL;
5419
5420         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5421                 return -EINVAL;
5422
5423         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5424         if (interval == 0)
5425                 return -EINVAL;
5426
5427         wiphy = &rdev->wiphy;
5428
5429         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5430                 n_channels = validate_scan_freqs(
5431                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5432                 if (!n_channels)
5433                         return -EINVAL;
5434         } else {
5435                 n_channels = 0;
5436
5437                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5438                         if (wiphy->bands[band])
5439                                 n_channels += wiphy->bands[band]->n_channels;
5440         }
5441
5442         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5443                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5444                                     tmp)
5445                         n_ssids++;
5446
5447         if (n_ssids > wiphy->max_sched_scan_ssids)
5448                 return -EINVAL;
5449
5450         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5451                 nla_for_each_nested(attr,
5452                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5453                                     tmp)
5454                         n_match_sets++;
5455
5456         if (n_match_sets > wiphy->max_match_sets)
5457                 return -EINVAL;
5458
5459         if (info->attrs[NL80211_ATTR_IE])
5460                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5461         else
5462                 ie_len = 0;
5463
5464         if (ie_len > wiphy->max_sched_scan_ie_len)
5465                 return -EINVAL;
5466
5467         if (rdev->sched_scan_req) {
5468                 err = -EINPROGRESS;
5469                 goto out;
5470         }
5471
5472         request = kzalloc(sizeof(*request)
5473                         + sizeof(*request->ssids) * n_ssids
5474                         + sizeof(*request->match_sets) * n_match_sets
5475                         + sizeof(*request->channels) * n_channels
5476                         + ie_len, GFP_KERNEL);
5477         if (!request) {
5478                 err = -ENOMEM;
5479                 goto out;
5480         }
5481
5482         if (n_ssids)
5483                 request->ssids = (void *)&request->channels[n_channels];
5484         request->n_ssids = n_ssids;
5485         if (ie_len) {
5486                 if (request->ssids)
5487                         request->ie = (void *)(request->ssids + n_ssids);
5488                 else
5489                         request->ie = (void *)(request->channels + n_channels);
5490         }
5491
5492         if (n_match_sets) {
5493                 if (request->ie)
5494                         request->match_sets = (void *)(request->ie + ie_len);
5495                 else if (request->ssids)
5496                         request->match_sets =
5497                                 (void *)(request->ssids + n_ssids);
5498                 else
5499                         request->match_sets =
5500                                 (void *)(request->channels + n_channels);
5501         }
5502         request->n_match_sets = n_match_sets;
5503
5504         i = 0;
5505         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5506                 /* user specified, bail out if channel not found */
5507                 nla_for_each_nested(attr,
5508                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5509                                     tmp) {
5510                         struct ieee80211_channel *chan;
5511
5512                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5513
5514                         if (!chan) {
5515                                 err = -EINVAL;
5516                                 goto out_free;
5517                         }
5518
5519                         /* ignore disabled channels */
5520                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5521                                 continue;
5522
5523                         request->channels[i] = chan;
5524                         i++;
5525                 }
5526         } else {
5527                 /* all channels */
5528                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5529                         int j;
5530                         if (!wiphy->bands[band])
5531                                 continue;
5532                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5533                                 struct ieee80211_channel *chan;
5534
5535                                 chan = &wiphy->bands[band]->channels[j];
5536
5537                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5538                                         continue;
5539
5540                                 request->channels[i] = chan;
5541                                 i++;
5542                         }
5543                 }
5544         }
5545
5546         if (!i) {
5547                 err = -EINVAL;
5548                 goto out_free;
5549         }
5550
5551         request->n_channels = i;
5552
5553         i = 0;
5554         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5555                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5556                                     tmp) {
5557                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5558                                 err = -EINVAL;
5559                                 goto out_free;
5560                         }
5561                         request->ssids[i].ssid_len = nla_len(attr);
5562                         memcpy(request->ssids[i].ssid, nla_data(attr),
5563                                nla_len(attr));
5564                         i++;
5565                 }
5566         }
5567
5568         i = 0;
5569         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5570                 nla_for_each_nested(attr,
5571                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5572                                     tmp) {
5573                         struct nlattr *ssid, *rssi;
5574
5575                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5576                                   nla_data(attr), nla_len(attr),
5577                                   nl80211_match_policy);
5578                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5579                         if (ssid) {
5580                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5581                                         err = -EINVAL;
5582                                         goto out_free;
5583                                 }
5584                                 memcpy(request->match_sets[i].ssid.ssid,
5585                                        nla_data(ssid), nla_len(ssid));
5586                                 request->match_sets[i].ssid.ssid_len =
5587                                         nla_len(ssid);
5588                         }
5589                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5590                         if (rssi)
5591                                 request->rssi_thold = nla_get_u32(rssi);
5592                         else
5593                                 request->rssi_thold =
5594                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5595                         i++;
5596                 }
5597         }
5598
5599         if (info->attrs[NL80211_ATTR_IE]) {
5600                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5601                 memcpy((void *)request->ie,
5602                        nla_data(info->attrs[NL80211_ATTR_IE]),
5603                        request->ie_len);
5604         }
5605
5606         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5607                 request->flags = nla_get_u32(
5608                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5609                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5610                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5611                         err = -EOPNOTSUPP;
5612                         goto out_free;
5613                 }
5614         }
5615
5616         request->dev = dev;
5617         request->wiphy = &rdev->wiphy;
5618         request->interval = interval;
5619         request->scan_start = jiffies;
5620
5621         err = rdev_sched_scan_start(rdev, dev, request);
5622         if (!err) {
5623                 rdev->sched_scan_req = request;
5624                 nl80211_send_sched_scan(rdev, dev,
5625                                         NL80211_CMD_START_SCHED_SCAN);
5626                 goto out;
5627         }
5628
5629 out_free:
5630         kfree(request);
5631 out:
5632         return err;
5633 }
5634
5635 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5636                                    struct genl_info *info)
5637 {
5638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5639
5640         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5641             !rdev->ops->sched_scan_stop)
5642                 return -EOPNOTSUPP;
5643
5644         return __cfg80211_stop_sched_scan(rdev, false);
5645 }
5646
5647 static int nl80211_start_radar_detection(struct sk_buff *skb,
5648                                          struct genl_info *info)
5649 {
5650         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5651         struct net_device *dev = info->user_ptr[1];
5652         struct wireless_dev *wdev = dev->ieee80211_ptr;
5653         struct cfg80211_chan_def chandef;
5654         enum nl80211_dfs_regions dfs_region;
5655         int err;
5656
5657         dfs_region = reg_get_dfs_region(wdev->wiphy);
5658         if (dfs_region == NL80211_DFS_UNSET)
5659                 return -EINVAL;
5660
5661         err = nl80211_parse_chandef(rdev, info, &chandef);
5662         if (err)
5663                 return err;
5664
5665         if (netif_carrier_ok(dev))
5666                 return -EBUSY;
5667
5668         if (wdev->cac_started)
5669                 return -EBUSY;
5670
5671         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5672         if (err < 0)
5673                 return err;
5674
5675         if (err == 0)
5676                 return -EINVAL;
5677
5678         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5679                 return -EINVAL;
5680
5681         if (!rdev->ops->start_radar_detection)
5682                 return -EOPNOTSUPP;
5683
5684         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5685                                            chandef.chan, CHAN_MODE_SHARED,
5686                                            BIT(chandef.width));
5687         if (err)
5688                 return err;
5689
5690         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5691         if (!err) {
5692                 wdev->channel = chandef.chan;
5693                 wdev->cac_started = true;
5694                 wdev->cac_start_time = jiffies;
5695         }
5696         return err;
5697 }
5698
5699 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5700 {
5701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5702         struct net_device *dev = info->user_ptr[1];
5703         struct wireless_dev *wdev = dev->ieee80211_ptr;
5704         struct cfg80211_csa_settings params;
5705         /* csa_attrs is defined static to avoid waste of stack size - this
5706          * function is called under RTNL lock, so this should not be a problem.
5707          */
5708         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5709         u8 radar_detect_width = 0;
5710         int err;
5711         bool need_new_beacon = false;
5712
5713         if (!rdev->ops->channel_switch ||
5714             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5715                 return -EOPNOTSUPP;
5716
5717         switch (dev->ieee80211_ptr->iftype) {
5718         case NL80211_IFTYPE_AP:
5719         case NL80211_IFTYPE_P2P_GO:
5720                 need_new_beacon = true;
5721
5722                 /* useless if AP is not running */
5723                 if (!wdev->beacon_interval)
5724                         return -EINVAL;
5725                 break;
5726         case NL80211_IFTYPE_ADHOC:
5727         case NL80211_IFTYPE_MESH_POINT:
5728                 break;
5729         default:
5730                 return -EOPNOTSUPP;
5731         }
5732
5733         memset(&params, 0, sizeof(params));
5734
5735         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5736             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5737                 return -EINVAL;
5738
5739         /* only important for AP, IBSS and mesh create IEs internally */
5740         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5741                 return -EINVAL;
5742
5743         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5744
5745         if (!need_new_beacon)
5746                 goto skip_beacons;
5747
5748         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5749         if (err)
5750                 return err;
5751
5752         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5753                                info->attrs[NL80211_ATTR_CSA_IES],
5754                                nl80211_policy);
5755         if (err)
5756                 return err;
5757
5758         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5759         if (err)
5760                 return err;
5761
5762         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5763                 return -EINVAL;
5764
5765         params.counter_offset_beacon =
5766                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5767         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5768                 return -EINVAL;
5769
5770         /* sanity check - counters should be the same */
5771         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5772             params.count)
5773                 return -EINVAL;
5774
5775         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5776                 params.counter_offset_presp =
5777                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5778                 if (params.counter_offset_presp >=
5779                     params.beacon_csa.probe_resp_len)
5780                         return -EINVAL;
5781
5782                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5783                     params.count)
5784                         return -EINVAL;
5785         }
5786
5787 skip_beacons:
5788         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5789         if (err)
5790                 return err;
5791
5792         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5793                 return -EINVAL;
5794
5795         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5796             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
5797             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
5798                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5799                                                     &params.chandef);
5800                 if (err < 0) {
5801                         return err;
5802                 } else if (err) {
5803                         radar_detect_width = BIT(params.chandef.width);
5804                         params.radar_required = true;
5805                 }
5806         }
5807
5808         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5809                                            params.chandef.chan,
5810                                            CHAN_MODE_SHARED,
5811                                            radar_detect_width);
5812         if (err)
5813                 return err;
5814
5815         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5816                 params.block_tx = true;
5817
5818         wdev_lock(wdev);
5819         err = rdev_channel_switch(rdev, dev, &params);
5820         wdev_unlock(wdev);
5821
5822         return err;
5823 }
5824
5825 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5826                             u32 seq, int flags,
5827                             struct cfg80211_registered_device *rdev,
5828                             struct wireless_dev *wdev,
5829                             struct cfg80211_internal_bss *intbss)
5830 {
5831         struct cfg80211_bss *res = &intbss->pub;
5832         const struct cfg80211_bss_ies *ies;
5833         void *hdr;
5834         struct nlattr *bss;
5835         bool tsf = false;
5836
5837         ASSERT_WDEV_LOCK(wdev);
5838
5839         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5840                              NL80211_CMD_NEW_SCAN_RESULTS);
5841         if (!hdr)
5842                 return -1;
5843
5844         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5845
5846         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5847                 goto nla_put_failure;
5848         if (wdev->netdev &&
5849             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5850                 goto nla_put_failure;
5851         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5852                 goto nla_put_failure;
5853
5854         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5855         if (!bss)
5856                 goto nla_put_failure;
5857         if ((!is_zero_ether_addr(res->bssid) &&
5858              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5859                 goto nla_put_failure;
5860
5861         rcu_read_lock();
5862         ies = rcu_dereference(res->ies);
5863         if (ies) {
5864                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5865                         goto fail_unlock_rcu;
5866                 tsf = true;
5867                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5868                                         ies->len, ies->data))
5869                         goto fail_unlock_rcu;
5870         }
5871         ies = rcu_dereference(res->beacon_ies);
5872         if (ies) {
5873                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5874                         goto fail_unlock_rcu;
5875                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5876                                         ies->len, ies->data))
5877                         goto fail_unlock_rcu;
5878         }
5879         rcu_read_unlock();
5880
5881         if (res->beacon_interval &&
5882             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5883                 goto nla_put_failure;
5884         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5885             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5886             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5887             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5888                         jiffies_to_msecs(jiffies - intbss->ts)))
5889                 goto nla_put_failure;
5890
5891         switch (rdev->wiphy.signal_type) {
5892         case CFG80211_SIGNAL_TYPE_MBM:
5893                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5894                         goto nla_put_failure;
5895                 break;
5896         case CFG80211_SIGNAL_TYPE_UNSPEC:
5897                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5898                         goto nla_put_failure;
5899                 break;
5900         default:
5901                 break;
5902         }
5903
5904         switch (wdev->iftype) {
5905         case NL80211_IFTYPE_P2P_CLIENT:
5906         case NL80211_IFTYPE_STATION:
5907                 if (intbss == wdev->current_bss &&
5908                     nla_put_u32(msg, NL80211_BSS_STATUS,
5909                                 NL80211_BSS_STATUS_ASSOCIATED))
5910                         goto nla_put_failure;
5911                 break;
5912         case NL80211_IFTYPE_ADHOC:
5913                 if (intbss == wdev->current_bss &&
5914                     nla_put_u32(msg, NL80211_BSS_STATUS,
5915                                 NL80211_BSS_STATUS_IBSS_JOINED))
5916                         goto nla_put_failure;
5917                 break;
5918         default:
5919                 break;
5920         }
5921
5922         nla_nest_end(msg, bss);
5923
5924         return genlmsg_end(msg, hdr);
5925
5926  fail_unlock_rcu:
5927         rcu_read_unlock();
5928  nla_put_failure:
5929         genlmsg_cancel(msg, hdr);
5930         return -EMSGSIZE;
5931 }
5932
5933 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5934 {
5935         struct cfg80211_registered_device *rdev;
5936         struct cfg80211_internal_bss *scan;
5937         struct wireless_dev *wdev;
5938         int start = cb->args[2], idx = 0;
5939         int err;
5940
5941         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5942         if (err)
5943                 return err;
5944
5945         wdev_lock(wdev);
5946         spin_lock_bh(&rdev->bss_lock);
5947         cfg80211_bss_expire(rdev);
5948
5949         cb->seq = rdev->bss_generation;
5950
5951         list_for_each_entry(scan, &rdev->bss_list, list) {
5952                 if (++idx <= start)
5953                         continue;
5954                 if (nl80211_send_bss(skb, cb,
5955                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5956                                 rdev, wdev, scan) < 0) {
5957                         idx--;
5958                         break;
5959                 }
5960         }
5961
5962         spin_unlock_bh(&rdev->bss_lock);
5963         wdev_unlock(wdev);
5964
5965         cb->args[2] = idx;
5966         nl80211_finish_wdev_dump(rdev);
5967
5968         return skb->len;
5969 }
5970
5971 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5972                                 int flags, struct net_device *dev,
5973                                 struct survey_info *survey)
5974 {
5975         void *hdr;
5976         struct nlattr *infoattr;
5977
5978         hdr = nl80211hdr_put(msg, portid, seq, flags,
5979                              NL80211_CMD_NEW_SURVEY_RESULTS);
5980         if (!hdr)
5981                 return -ENOMEM;
5982
5983         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5984                 goto nla_put_failure;
5985
5986         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5987         if (!infoattr)
5988                 goto nla_put_failure;
5989
5990         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5991                         survey->channel->center_freq))
5992                 goto nla_put_failure;
5993
5994         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5995             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5996                 goto nla_put_failure;
5997         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5998             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5999                 goto nla_put_failure;
6000         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6001             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6002                         survey->channel_time))
6003                 goto nla_put_failure;
6004         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6005             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6006                         survey->channel_time_busy))
6007                 goto nla_put_failure;
6008         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6009             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6010                         survey->channel_time_ext_busy))
6011                 goto nla_put_failure;
6012         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6013             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6014                         survey->channel_time_rx))
6015                 goto nla_put_failure;
6016         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6017             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6018                         survey->channel_time_tx))
6019                 goto nla_put_failure;
6020
6021         nla_nest_end(msg, infoattr);
6022
6023         return genlmsg_end(msg, hdr);
6024
6025  nla_put_failure:
6026         genlmsg_cancel(msg, hdr);
6027         return -EMSGSIZE;
6028 }
6029
6030 static int nl80211_dump_survey(struct sk_buff *skb,
6031                         struct netlink_callback *cb)
6032 {
6033         struct survey_info survey;
6034         struct cfg80211_registered_device *dev;
6035         struct wireless_dev *wdev;
6036         int survey_idx = cb->args[2];
6037         int res;
6038
6039         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
6040         if (res)
6041                 return res;
6042
6043         if (!wdev->netdev) {
6044                 res = -EINVAL;
6045                 goto out_err;
6046         }
6047
6048         if (!dev->ops->dump_survey) {
6049                 res = -EOPNOTSUPP;
6050                 goto out_err;
6051         }
6052
6053         while (1) {
6054                 struct ieee80211_channel *chan;
6055
6056                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
6057                 if (res == -ENOENT)
6058                         break;
6059                 if (res)
6060                         goto out_err;
6061
6062                 /* Survey without a channel doesn't make sense */
6063                 if (!survey.channel) {
6064                         res = -EINVAL;
6065                         goto out;
6066                 }
6067
6068                 chan = ieee80211_get_channel(&dev->wiphy,
6069                                              survey.channel->center_freq);
6070                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6071                         survey_idx++;
6072                         continue;
6073                 }
6074
6075                 if (nl80211_send_survey(skb,
6076                                 NETLINK_CB(cb->skb).portid,
6077                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6078                                 wdev->netdev, &survey) < 0)
6079                         goto out;
6080                 survey_idx++;
6081         }
6082
6083  out:
6084         cb->args[2] = survey_idx;
6085         res = skb->len;
6086  out_err:
6087         nl80211_finish_wdev_dump(dev);
6088         return res;
6089 }
6090
6091 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6092 {
6093         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6094                                   NL80211_WPA_VERSION_2));
6095 }
6096
6097 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6098 {
6099         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6100         struct net_device *dev = info->user_ptr[1];
6101         struct ieee80211_channel *chan;
6102         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6103         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6104         enum nl80211_auth_type auth_type;
6105         struct key_parse key;
6106         bool local_state_change;
6107
6108         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6109                 return -EINVAL;
6110
6111         if (!info->attrs[NL80211_ATTR_MAC])
6112                 return -EINVAL;
6113
6114         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6115                 return -EINVAL;
6116
6117         if (!info->attrs[NL80211_ATTR_SSID])
6118                 return -EINVAL;
6119
6120         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6121                 return -EINVAL;
6122
6123         err = nl80211_parse_key(info, &key);
6124         if (err)
6125                 return err;
6126
6127         if (key.idx >= 0) {
6128                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6129                         return -EINVAL;
6130                 if (!key.p.key || !key.p.key_len)
6131                         return -EINVAL;
6132                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6133                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6134                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6135                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6136                         return -EINVAL;
6137                 if (key.idx > 4)
6138                         return -EINVAL;
6139         } else {
6140                 key.p.key_len = 0;
6141                 key.p.key = NULL;
6142         }
6143
6144         if (key.idx >= 0) {
6145                 int i;
6146                 bool ok = false;
6147                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6148                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6149                                 ok = true;
6150                                 break;
6151                         }
6152                 }
6153                 if (!ok)
6154                         return -EINVAL;
6155         }
6156
6157         if (!rdev->ops->auth)
6158                 return -EOPNOTSUPP;
6159
6160         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6161             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6162                 return -EOPNOTSUPP;
6163
6164         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6165         chan = ieee80211_get_channel(&rdev->wiphy,
6166                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6167         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6168                 return -EINVAL;
6169
6170         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6171         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6172
6173         if (info->attrs[NL80211_ATTR_IE]) {
6174                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6175                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6176         }
6177
6178         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6179         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6180                 return -EINVAL;
6181
6182         if (auth_type == NL80211_AUTHTYPE_SAE &&
6183             !info->attrs[NL80211_ATTR_SAE_DATA])
6184                 return -EINVAL;
6185
6186         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6187                 if (auth_type != NL80211_AUTHTYPE_SAE)
6188                         return -EINVAL;
6189                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6190                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6191                 /* need to include at least Auth Transaction and Status Code */
6192                 if (sae_data_len < 4)
6193                         return -EINVAL;
6194         }
6195
6196         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6197
6198         /*
6199          * Since we no longer track auth state, ignore
6200          * requests to only change local state.
6201          */
6202         if (local_state_change)
6203                 return 0;
6204
6205         wdev_lock(dev->ieee80211_ptr);
6206         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6207                                  ssid, ssid_len, ie, ie_len,
6208                                  key.p.key, key.p.key_len, key.idx,
6209                                  sae_data, sae_data_len);
6210         wdev_unlock(dev->ieee80211_ptr);
6211         return err;
6212 }
6213
6214 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6215                                    struct genl_info *info,
6216                                    struct cfg80211_crypto_settings *settings,
6217                                    int cipher_limit)
6218 {
6219         memset(settings, 0, sizeof(*settings));
6220
6221         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6222
6223         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6224                 u16 proto;
6225                 proto = nla_get_u16(
6226                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6227                 settings->control_port_ethertype = cpu_to_be16(proto);
6228                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6229                     proto != ETH_P_PAE)
6230                         return -EINVAL;
6231                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6232                         settings->control_port_no_encrypt = true;
6233         } else
6234                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6235
6236         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6237                 void *data;
6238                 int len, i;
6239
6240                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6241                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6242                 settings->n_ciphers_pairwise = len / sizeof(u32);
6243
6244                 if (len % sizeof(u32))
6245                         return -EINVAL;
6246
6247                 if (settings->n_ciphers_pairwise > cipher_limit)
6248                         return -EINVAL;
6249
6250                 memcpy(settings->ciphers_pairwise, data, len);
6251
6252                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6253                         if (!cfg80211_supported_cipher_suite(
6254                                         &rdev->wiphy,
6255                                         settings->ciphers_pairwise[i]))
6256                                 return -EINVAL;
6257         }
6258
6259         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6260                 settings->cipher_group =
6261                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6262                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6263                                                      settings->cipher_group))
6264                         return -EINVAL;
6265         }
6266
6267         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6268                 settings->wpa_versions =
6269                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6270                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6271                         return -EINVAL;
6272         }
6273
6274         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6275                 void *data;
6276                 int len;
6277
6278                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6279                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6280                 settings->n_akm_suites = len / sizeof(u32);
6281
6282                 if (len % sizeof(u32))
6283                         return -EINVAL;
6284
6285                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6286                         return -EINVAL;
6287
6288                 memcpy(settings->akm_suites, data, len);
6289         }
6290
6291         return 0;
6292 }
6293
6294 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6295 {
6296         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6297         struct net_device *dev = info->user_ptr[1];
6298         struct ieee80211_channel *chan;
6299         struct cfg80211_assoc_request req = {};
6300         const u8 *bssid, *ssid;
6301         int err, ssid_len = 0;
6302
6303         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6304                 return -EINVAL;
6305
6306         if (!info->attrs[NL80211_ATTR_MAC] ||
6307             !info->attrs[NL80211_ATTR_SSID] ||
6308             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6309                 return -EINVAL;
6310
6311         if (!rdev->ops->assoc)
6312                 return -EOPNOTSUPP;
6313
6314         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6315             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6316                 return -EOPNOTSUPP;
6317
6318         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6319
6320         chan = ieee80211_get_channel(&rdev->wiphy,
6321                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6322         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6323                 return -EINVAL;
6324
6325         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6326         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6327
6328         if (info->attrs[NL80211_ATTR_IE]) {
6329                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6330                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6331         }
6332
6333         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6334                 enum nl80211_mfp mfp =
6335                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6336                 if (mfp == NL80211_MFP_REQUIRED)
6337                         req.use_mfp = true;
6338                 else if (mfp != NL80211_MFP_NO)
6339                         return -EINVAL;
6340         }
6341
6342         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6343                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6344
6345         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6346                 req.flags |= ASSOC_REQ_DISABLE_HT;
6347
6348         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6349                 memcpy(&req.ht_capa_mask,
6350                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6351                        sizeof(req.ht_capa_mask));
6352
6353         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6354                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6355                         return -EINVAL;
6356                 memcpy(&req.ht_capa,
6357                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6358                        sizeof(req.ht_capa));
6359         }
6360
6361         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6362                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6363
6364         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6365                 memcpy(&req.vht_capa_mask,
6366                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6367                        sizeof(req.vht_capa_mask));
6368
6369         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6370                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6371                         return -EINVAL;
6372                 memcpy(&req.vht_capa,
6373                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6374                        sizeof(req.vht_capa));
6375         }
6376
6377         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6378         if (!err) {
6379                 wdev_lock(dev->ieee80211_ptr);
6380                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6381                                           ssid, ssid_len, &req);
6382                 wdev_unlock(dev->ieee80211_ptr);
6383         }
6384
6385         return err;
6386 }
6387
6388 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6389 {
6390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6391         struct net_device *dev = info->user_ptr[1];
6392         const u8 *ie = NULL, *bssid;
6393         int ie_len = 0, err;
6394         u16 reason_code;
6395         bool local_state_change;
6396
6397         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6398                 return -EINVAL;
6399
6400         if (!info->attrs[NL80211_ATTR_MAC])
6401                 return -EINVAL;
6402
6403         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6404                 return -EINVAL;
6405
6406         if (!rdev->ops->deauth)
6407                 return -EOPNOTSUPP;
6408
6409         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6410             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6411                 return -EOPNOTSUPP;
6412
6413         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6414
6415         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6416         if (reason_code == 0) {
6417                 /* Reason Code 0 is reserved */
6418                 return -EINVAL;
6419         }
6420
6421         if (info->attrs[NL80211_ATTR_IE]) {
6422                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6423                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6424         }
6425
6426         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6427
6428         wdev_lock(dev->ieee80211_ptr);
6429         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6430                                    local_state_change);
6431         wdev_unlock(dev->ieee80211_ptr);
6432         return err;
6433 }
6434
6435 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6436 {
6437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6438         struct net_device *dev = info->user_ptr[1];
6439         const u8 *ie = NULL, *bssid;
6440         int ie_len = 0, err;
6441         u16 reason_code;
6442         bool local_state_change;
6443
6444         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6445                 return -EINVAL;
6446
6447         if (!info->attrs[NL80211_ATTR_MAC])
6448                 return -EINVAL;
6449
6450         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6451                 return -EINVAL;
6452
6453         if (!rdev->ops->disassoc)
6454                 return -EOPNOTSUPP;
6455
6456         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6457             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6458                 return -EOPNOTSUPP;
6459
6460         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6461
6462         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6463         if (reason_code == 0) {
6464                 /* Reason Code 0 is reserved */
6465                 return -EINVAL;
6466         }
6467
6468         if (info->attrs[NL80211_ATTR_IE]) {
6469                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6470                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6471         }
6472
6473         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6474
6475         wdev_lock(dev->ieee80211_ptr);
6476         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6477                                      local_state_change);
6478         wdev_unlock(dev->ieee80211_ptr);
6479         return err;
6480 }
6481
6482 static bool
6483 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6484                          int mcast_rate[IEEE80211_NUM_BANDS],
6485                          int rateval)
6486 {
6487         struct wiphy *wiphy = &rdev->wiphy;
6488         bool found = false;
6489         int band, i;
6490
6491         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6492                 struct ieee80211_supported_band *sband;
6493
6494                 sband = wiphy->bands[band];
6495                 if (!sband)
6496                         continue;
6497
6498                 for (i = 0; i < sband->n_bitrates; i++) {
6499                         if (sband->bitrates[i].bitrate == rateval) {
6500                                 mcast_rate[band] = i + 1;
6501                                 found = true;
6502                                 break;
6503                         }
6504                 }
6505         }
6506
6507         return found;
6508 }
6509
6510 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6511 {
6512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6513         struct net_device *dev = info->user_ptr[1];
6514         struct cfg80211_ibss_params ibss;
6515         struct wiphy *wiphy;
6516         struct cfg80211_cached_keys *connkeys = NULL;
6517         int err;
6518
6519         memset(&ibss, 0, sizeof(ibss));
6520
6521         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6522                 return -EINVAL;
6523
6524         if (!info->attrs[NL80211_ATTR_SSID] ||
6525             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6526                 return -EINVAL;
6527
6528         ibss.beacon_interval = 100;
6529
6530         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6531                 ibss.beacon_interval =
6532                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6533                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6534                         return -EINVAL;
6535         }
6536
6537         if (!rdev->ops->join_ibss)
6538                 return -EOPNOTSUPP;
6539
6540         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6541                 return -EOPNOTSUPP;
6542
6543         wiphy = &rdev->wiphy;
6544
6545         if (info->attrs[NL80211_ATTR_MAC]) {
6546                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6547
6548                 if (!is_valid_ether_addr(ibss.bssid))
6549                         return -EINVAL;
6550         }
6551         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6552         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6553
6554         if (info->attrs[NL80211_ATTR_IE]) {
6555                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6556                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6557         }
6558
6559         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6560         if (err)
6561                 return err;
6562
6563         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6564                 return -EINVAL;
6565
6566         switch (ibss.chandef.width) {
6567         case NL80211_CHAN_WIDTH_5:
6568         case NL80211_CHAN_WIDTH_10:
6569         case NL80211_CHAN_WIDTH_20_NOHT:
6570                 break;
6571         case NL80211_CHAN_WIDTH_20:
6572         case NL80211_CHAN_WIDTH_40:
6573                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6574                         break;
6575         default:
6576                 return -EINVAL;
6577         }
6578
6579         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6580         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6581
6582         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6583                 u8 *rates =
6584                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6585                 int n_rates =
6586                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6587                 struct ieee80211_supported_band *sband =
6588                         wiphy->bands[ibss.chandef.chan->band];
6589
6590                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6591                                              &ibss.basic_rates);
6592                 if (err)
6593                         return err;
6594         }
6595
6596         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6597                 memcpy(&ibss.ht_capa_mask,
6598                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6599                        sizeof(ibss.ht_capa_mask));
6600
6601         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6602                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6603                         return -EINVAL;
6604                 memcpy(&ibss.ht_capa,
6605                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6606                        sizeof(ibss.ht_capa));
6607         }
6608
6609         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6610             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6611                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6612                 return -EINVAL;
6613
6614         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6615                 bool no_ht = false;
6616
6617                 connkeys = nl80211_parse_connkeys(rdev,
6618                                           info->attrs[NL80211_ATTR_KEYS],
6619                                           &no_ht);
6620                 if (IS_ERR(connkeys))
6621                         return PTR_ERR(connkeys);
6622
6623                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6624                     no_ht) {
6625                         kfree(connkeys);
6626                         return -EINVAL;
6627                 }
6628         }
6629
6630         ibss.control_port =
6631                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6632
6633         ibss.userspace_handles_dfs =
6634                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6635
6636         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6637         if (err)
6638                 kfree(connkeys);
6639         return err;
6640 }
6641
6642 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6643 {
6644         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6645         struct net_device *dev = info->user_ptr[1];
6646
6647         if (!rdev->ops->leave_ibss)
6648                 return -EOPNOTSUPP;
6649
6650         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6651                 return -EOPNOTSUPP;
6652
6653         return cfg80211_leave_ibss(rdev, dev, false);
6654 }
6655
6656 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6657 {
6658         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6659         struct net_device *dev = info->user_ptr[1];
6660         int mcast_rate[IEEE80211_NUM_BANDS];
6661         u32 nla_rate;
6662         int err;
6663
6664         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6665             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6666                 return -EOPNOTSUPP;
6667
6668         if (!rdev->ops->set_mcast_rate)
6669                 return -EOPNOTSUPP;
6670
6671         memset(mcast_rate, 0, sizeof(mcast_rate));
6672
6673         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6674                 return -EINVAL;
6675
6676         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6677         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6678                 return -EINVAL;
6679
6680         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6681
6682         return err;
6683 }
6684
6685
6686 #ifdef CONFIG_NL80211_TESTMODE
6687 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6688         .name = "testmode",
6689 };
6690
6691 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6692 {
6693         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6694         struct wireless_dev *wdev =
6695                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6696         int err;
6697
6698         if (!rdev->ops->testmode_cmd)
6699                 return -EOPNOTSUPP;
6700
6701         if (IS_ERR(wdev)) {
6702                 err = PTR_ERR(wdev);
6703                 if (err != -EINVAL)
6704                         return err;
6705                 wdev = NULL;
6706         } else if (wdev->wiphy != &rdev->wiphy) {
6707                 return -EINVAL;
6708         }
6709
6710         if (!info->attrs[NL80211_ATTR_TESTDATA])
6711                 return -EINVAL;
6712
6713         rdev->testmode_info = info;
6714         err = rdev_testmode_cmd(rdev, wdev,
6715                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6716                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6717         rdev->testmode_info = NULL;
6718
6719         return err;
6720 }
6721
6722 static int nl80211_testmode_dump(struct sk_buff *skb,
6723                                  struct netlink_callback *cb)
6724 {
6725         struct cfg80211_registered_device *rdev;
6726         int err;
6727         long phy_idx;
6728         void *data = NULL;
6729         int data_len = 0;
6730
6731         rtnl_lock();
6732
6733         if (cb->args[0]) {
6734                 /*
6735                  * 0 is a valid index, but not valid for args[0],
6736                  * so we need to offset by 1.
6737                  */
6738                 phy_idx = cb->args[0] - 1;
6739         } else {
6740                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6741                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6742                                   nl80211_policy);
6743                 if (err)
6744                         goto out_err;
6745
6746                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6747                                                   nl80211_fam.attrbuf);
6748                 if (IS_ERR(rdev)) {
6749                         err = PTR_ERR(rdev);
6750                         goto out_err;
6751                 }
6752                 phy_idx = rdev->wiphy_idx;
6753                 rdev = NULL;
6754
6755                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6756                         cb->args[1] =
6757                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6758         }
6759
6760         if (cb->args[1]) {
6761                 data = nla_data((void *)cb->args[1]);
6762                 data_len = nla_len((void *)cb->args[1]);
6763         }
6764
6765         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6766         if (!rdev) {
6767                 err = -ENOENT;
6768                 goto out_err;
6769         }
6770
6771         if (!rdev->ops->testmode_dump) {
6772                 err = -EOPNOTSUPP;
6773                 goto out_err;
6774         }
6775
6776         while (1) {
6777                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6778                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6779                                            NL80211_CMD_TESTMODE);
6780                 struct nlattr *tmdata;
6781
6782                 if (!hdr)
6783                         break;
6784
6785                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6786                         genlmsg_cancel(skb, hdr);
6787                         break;
6788                 }
6789
6790                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6791                 if (!tmdata) {
6792                         genlmsg_cancel(skb, hdr);
6793                         break;
6794                 }
6795                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6796                 nla_nest_end(skb, tmdata);
6797
6798                 if (err == -ENOBUFS || err == -ENOENT) {
6799                         genlmsg_cancel(skb, hdr);
6800                         break;
6801                 } else if (err) {
6802                         genlmsg_cancel(skb, hdr);
6803                         goto out_err;
6804                 }
6805
6806                 genlmsg_end(skb, hdr);
6807         }
6808
6809         err = skb->len;
6810         /* see above */
6811         cb->args[0] = phy_idx + 1;
6812  out_err:
6813         rtnl_unlock();
6814         return err;
6815 }
6816
6817 static struct sk_buff *
6818 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6819                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6820 {
6821         struct sk_buff *skb;
6822         void *hdr;
6823         struct nlattr *data;
6824
6825         skb = nlmsg_new(approxlen + 100, gfp);
6826         if (!skb)
6827                 return NULL;
6828
6829         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6830         if (!hdr) {
6831                 kfree_skb(skb);
6832                 return NULL;
6833         }
6834
6835         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6836                 goto nla_put_failure;
6837         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6838
6839         ((void **)skb->cb)[0] = rdev;
6840         ((void **)skb->cb)[1] = hdr;
6841         ((void **)skb->cb)[2] = data;
6842
6843         return skb;
6844
6845  nla_put_failure:
6846         kfree_skb(skb);
6847         return NULL;
6848 }
6849
6850 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6851                                                   int approxlen)
6852 {
6853         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6854
6855         if (WARN_ON(!rdev->testmode_info))
6856                 return NULL;
6857
6858         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6859                                 rdev->testmode_info->snd_portid,
6860                                 rdev->testmode_info->snd_seq,
6861                                 GFP_KERNEL);
6862 }
6863 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6864
6865 int cfg80211_testmode_reply(struct sk_buff *skb)
6866 {
6867         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6868         void *hdr = ((void **)skb->cb)[1];
6869         struct nlattr *data = ((void **)skb->cb)[2];
6870
6871         if (WARN_ON(!rdev->testmode_info)) {
6872                 kfree_skb(skb);
6873                 return -EINVAL;
6874         }
6875
6876         nla_nest_end(skb, data);
6877         genlmsg_end(skb, hdr);
6878         return genlmsg_reply(skb, rdev->testmode_info);
6879 }
6880 EXPORT_SYMBOL(cfg80211_testmode_reply);
6881
6882 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6883                                                   int approxlen, gfp_t gfp)
6884 {
6885         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6886
6887         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6888 }
6889 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6890
6891 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6892 {
6893         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6894         void *hdr = ((void **)skb->cb)[1];
6895         struct nlattr *data = ((void **)skb->cb)[2];
6896
6897         nla_nest_end(skb, data);
6898         genlmsg_end(skb, hdr);
6899         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6900                                 nl80211_testmode_mcgrp.id, gfp);
6901 }
6902 EXPORT_SYMBOL(cfg80211_testmode_event);
6903 #endif
6904
6905 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6906 {
6907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6908         struct net_device *dev = info->user_ptr[1];
6909         struct cfg80211_connect_params connect;
6910         struct wiphy *wiphy;
6911         struct cfg80211_cached_keys *connkeys = NULL;
6912         int err;
6913
6914         memset(&connect, 0, sizeof(connect));
6915
6916         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6917                 return -EINVAL;
6918
6919         if (!info->attrs[NL80211_ATTR_SSID] ||
6920             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6921                 return -EINVAL;
6922
6923         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6924                 connect.auth_type =
6925                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6926                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6927                                              NL80211_CMD_CONNECT))
6928                         return -EINVAL;
6929         } else
6930                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6931
6932         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6933
6934         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6935                                       NL80211_MAX_NR_CIPHER_SUITES);
6936         if (err)
6937                 return err;
6938
6939         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6940             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6941                 return -EOPNOTSUPP;
6942
6943         wiphy = &rdev->wiphy;
6944
6945         connect.bg_scan_period = -1;
6946         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6947                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6948                 connect.bg_scan_period =
6949                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6950         }
6951
6952         if (info->attrs[NL80211_ATTR_MAC])
6953                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6954         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6955         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6956
6957         if (info->attrs[NL80211_ATTR_IE]) {
6958                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6959                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6960         }
6961
6962         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6963                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6964                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6965                     connect.mfp != NL80211_MFP_NO)
6966                         return -EINVAL;
6967         } else {
6968                 connect.mfp = NL80211_MFP_NO;
6969         }
6970
6971         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6972                 connect.channel =
6973                         ieee80211_get_channel(wiphy,
6974                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6975                 if (!connect.channel ||
6976                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6977                         return -EINVAL;
6978         }
6979
6980         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6981                 connkeys = nl80211_parse_connkeys(rdev,
6982                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6983                 if (IS_ERR(connkeys))
6984                         return PTR_ERR(connkeys);
6985         }
6986
6987         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6988                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6989
6990         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6991                 memcpy(&connect.ht_capa_mask,
6992                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6993                        sizeof(connect.ht_capa_mask));
6994
6995         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6996                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6997                         kfree(connkeys);
6998                         return -EINVAL;
6999                 }
7000                 memcpy(&connect.ht_capa,
7001                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7002                        sizeof(connect.ht_capa));
7003         }
7004
7005         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7006                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7007
7008         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7009                 memcpy(&connect.vht_capa_mask,
7010                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7011                        sizeof(connect.vht_capa_mask));
7012
7013         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7014                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7015                         kfree(connkeys);
7016                         return -EINVAL;
7017                 }
7018                 memcpy(&connect.vht_capa,
7019                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7020                        sizeof(connect.vht_capa));
7021         }
7022
7023         wdev_lock(dev->ieee80211_ptr);
7024         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7025         wdev_unlock(dev->ieee80211_ptr);
7026         if (err)
7027                 kfree(connkeys);
7028         return err;
7029 }
7030
7031 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7032 {
7033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7034         struct net_device *dev = info->user_ptr[1];
7035         u16 reason;
7036         int ret;
7037
7038         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7039                 reason = WLAN_REASON_DEAUTH_LEAVING;
7040         else
7041                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7042
7043         if (reason == 0)
7044                 return -EINVAL;
7045
7046         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7047             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7048                 return -EOPNOTSUPP;
7049
7050         wdev_lock(dev->ieee80211_ptr);
7051         ret = cfg80211_disconnect(rdev, dev, reason, true);
7052         wdev_unlock(dev->ieee80211_ptr);
7053         return ret;
7054 }
7055
7056 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7057 {
7058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7059         struct net *net;
7060         int err;
7061         u32 pid;
7062
7063         if (!info->attrs[NL80211_ATTR_PID])
7064                 return -EINVAL;
7065
7066         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7067
7068         net = get_net_ns_by_pid(pid);
7069         if (IS_ERR(net))
7070                 return PTR_ERR(net);
7071
7072         err = 0;
7073
7074         /* check if anything to do */
7075         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7076                 err = cfg80211_switch_netns(rdev, net);
7077
7078         put_net(net);
7079         return err;
7080 }
7081
7082 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7083 {
7084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7085         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7086                         struct cfg80211_pmksa *pmksa) = NULL;
7087         struct net_device *dev = info->user_ptr[1];
7088         struct cfg80211_pmksa pmksa;
7089
7090         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7091
7092         if (!info->attrs[NL80211_ATTR_MAC])
7093                 return -EINVAL;
7094
7095         if (!info->attrs[NL80211_ATTR_PMKID])
7096                 return -EINVAL;
7097
7098         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7099         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7100
7101         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7102             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7103                 return -EOPNOTSUPP;
7104
7105         switch (info->genlhdr->cmd) {
7106         case NL80211_CMD_SET_PMKSA:
7107                 rdev_ops = rdev->ops->set_pmksa;
7108                 break;
7109         case NL80211_CMD_DEL_PMKSA:
7110                 rdev_ops = rdev->ops->del_pmksa;
7111                 break;
7112         default:
7113                 WARN_ON(1);
7114                 break;
7115         }
7116
7117         if (!rdev_ops)
7118                 return -EOPNOTSUPP;
7119
7120         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7121 }
7122
7123 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7124 {
7125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7126         struct net_device *dev = info->user_ptr[1];
7127
7128         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7129             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7130                 return -EOPNOTSUPP;
7131
7132         if (!rdev->ops->flush_pmksa)
7133                 return -EOPNOTSUPP;
7134
7135         return rdev_flush_pmksa(rdev, dev);
7136 }
7137
7138 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7139 {
7140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7141         struct net_device *dev = info->user_ptr[1];
7142         u8 action_code, dialog_token;
7143         u16 status_code;
7144         u8 *peer;
7145
7146         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7147             !rdev->ops->tdls_mgmt)
7148                 return -EOPNOTSUPP;
7149
7150         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7151             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7152             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7153             !info->attrs[NL80211_ATTR_IE] ||
7154             !info->attrs[NL80211_ATTR_MAC])
7155                 return -EINVAL;
7156
7157         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7158         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7159         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7160         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7161
7162         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7163                               dialog_token, status_code,
7164                               nla_data(info->attrs[NL80211_ATTR_IE]),
7165                               nla_len(info->attrs[NL80211_ATTR_IE]));
7166 }
7167
7168 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7169 {
7170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7171         struct net_device *dev = info->user_ptr[1];
7172         enum nl80211_tdls_operation operation;
7173         u8 *peer;
7174
7175         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7176             !rdev->ops->tdls_oper)
7177                 return -EOPNOTSUPP;
7178
7179         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7180             !info->attrs[NL80211_ATTR_MAC])
7181                 return -EINVAL;
7182
7183         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7184         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7185
7186         return rdev_tdls_oper(rdev, dev, peer, operation);
7187 }
7188
7189 static int nl80211_remain_on_channel(struct sk_buff *skb,
7190                                      struct genl_info *info)
7191 {
7192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7193         struct wireless_dev *wdev = info->user_ptr[1];
7194         struct cfg80211_chan_def chandef;
7195         struct sk_buff *msg;
7196         void *hdr;
7197         u64 cookie;
7198         u32 duration;
7199         int err;
7200
7201         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7202             !info->attrs[NL80211_ATTR_DURATION])
7203                 return -EINVAL;
7204
7205         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7206
7207         if (!rdev->ops->remain_on_channel ||
7208             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7209                 return -EOPNOTSUPP;
7210
7211         /*
7212          * We should be on that channel for at least a minimum amount of
7213          * time (10ms) but no longer than the driver supports.
7214          */
7215         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7216             duration > rdev->wiphy.max_remain_on_channel_duration)
7217                 return -EINVAL;
7218
7219         err = nl80211_parse_chandef(rdev, info, &chandef);
7220         if (err)
7221                 return err;
7222
7223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7224         if (!msg)
7225                 return -ENOMEM;
7226
7227         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7228                              NL80211_CMD_REMAIN_ON_CHANNEL);
7229         if (!hdr) {
7230                 err = -ENOBUFS;
7231                 goto free_msg;
7232         }
7233
7234         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7235                                      duration, &cookie);
7236
7237         if (err)
7238                 goto free_msg;
7239
7240         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7241                 goto nla_put_failure;
7242
7243         genlmsg_end(msg, hdr);
7244
7245         return genlmsg_reply(msg, info);
7246
7247  nla_put_failure:
7248         err = -ENOBUFS;
7249  free_msg:
7250         nlmsg_free(msg);
7251         return err;
7252 }
7253
7254 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7255                                             struct genl_info *info)
7256 {
7257         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7258         struct wireless_dev *wdev = info->user_ptr[1];
7259         u64 cookie;
7260
7261         if (!info->attrs[NL80211_ATTR_COOKIE])
7262                 return -EINVAL;
7263
7264         if (!rdev->ops->cancel_remain_on_channel)
7265                 return -EOPNOTSUPP;
7266
7267         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7268
7269         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7270 }
7271
7272 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7273                            u8 *rates, u8 rates_len)
7274 {
7275         u8 i;
7276         u32 mask = 0;
7277
7278         for (i = 0; i < rates_len; i++) {
7279                 int rate = (rates[i] & 0x7f) * 5;
7280                 int ridx;
7281                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7282                         struct ieee80211_rate *srate =
7283                                 &sband->bitrates[ridx];
7284                         if (rate == srate->bitrate) {
7285                                 mask |= 1 << ridx;
7286                                 break;
7287                         }
7288                 }
7289                 if (ridx == sband->n_bitrates)
7290                         return 0; /* rate not found */
7291         }
7292
7293         return mask;
7294 }
7295
7296 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7297                                u8 *rates, u8 rates_len,
7298                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7299 {
7300         u8 i;
7301
7302         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7303
7304         for (i = 0; i < rates_len; i++) {
7305                 int ridx, rbit;
7306
7307                 ridx = rates[i] / 8;
7308                 rbit = BIT(rates[i] % 8);
7309
7310                 /* check validity */
7311                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7312                         return false;
7313
7314                 /* check availability */
7315                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7316                         mcs[ridx] |= rbit;
7317                 else
7318                         return false;
7319         }
7320
7321         return true;
7322 }
7323
7324 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7325         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7326                                     .len = NL80211_MAX_SUPP_RATES },
7327         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7328                                  .len = NL80211_MAX_SUPP_HT_RATES },
7329 };
7330
7331 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7332                                        struct genl_info *info)
7333 {
7334         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7336         struct cfg80211_bitrate_mask mask;
7337         int rem, i;
7338         struct net_device *dev = info->user_ptr[1];
7339         struct nlattr *tx_rates;
7340         struct ieee80211_supported_band *sband;
7341
7342         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7343                 return -EINVAL;
7344
7345         if (!rdev->ops->set_bitrate_mask)
7346                 return -EOPNOTSUPP;
7347
7348         memset(&mask, 0, sizeof(mask));
7349         /* Default to all rates enabled */
7350         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7351                 sband = rdev->wiphy.bands[i];
7352                 mask.control[i].legacy =
7353                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7354                 if (sband)
7355                         memcpy(mask.control[i].mcs,
7356                                sband->ht_cap.mcs.rx_mask,
7357                                sizeof(mask.control[i].mcs));
7358                 else
7359                         memset(mask.control[i].mcs, 0,
7360                                sizeof(mask.control[i].mcs));
7361         }
7362
7363         /*
7364          * The nested attribute uses enum nl80211_band as the index. This maps
7365          * directly to the enum ieee80211_band values used in cfg80211.
7366          */
7367         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7368         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7369         {
7370                 enum ieee80211_band band = nla_type(tx_rates);
7371                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7372                         return -EINVAL;
7373                 sband = rdev->wiphy.bands[band];
7374                 if (sband == NULL)
7375                         return -EINVAL;
7376                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7377                           nla_len(tx_rates), nl80211_txattr_policy);
7378                 if (tb[NL80211_TXRATE_LEGACY]) {
7379                         mask.control[band].legacy = rateset_to_mask(
7380                                 sband,
7381                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7382                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7383                         if ((mask.control[band].legacy == 0) &&
7384                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7385                                 return -EINVAL;
7386                 }
7387                 if (tb[NL80211_TXRATE_MCS]) {
7388                         if (!ht_rateset_to_mask(
7389                                         sband,
7390                                         nla_data(tb[NL80211_TXRATE_MCS]),
7391                                         nla_len(tb[NL80211_TXRATE_MCS]),
7392                                         mask.control[band].mcs))
7393                                 return -EINVAL;
7394                 }
7395
7396                 if (mask.control[band].legacy == 0) {
7397                         /* don't allow empty legacy rates if HT
7398                          * is not even supported. */
7399                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7400                                 return -EINVAL;
7401
7402                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7403                                 if (mask.control[band].mcs[i])
7404                                         break;
7405
7406                         /* legacy and mcs rates may not be both empty */
7407                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7408                                 return -EINVAL;
7409                 }
7410         }
7411
7412         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7413 }
7414
7415 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7416 {
7417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7418         struct wireless_dev *wdev = info->user_ptr[1];
7419         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7420
7421         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7422                 return -EINVAL;
7423
7424         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7425                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7426
7427         switch (wdev->iftype) {
7428         case NL80211_IFTYPE_STATION:
7429         case NL80211_IFTYPE_ADHOC:
7430         case NL80211_IFTYPE_P2P_CLIENT:
7431         case NL80211_IFTYPE_AP:
7432         case NL80211_IFTYPE_AP_VLAN:
7433         case NL80211_IFTYPE_MESH_POINT:
7434         case NL80211_IFTYPE_P2P_GO:
7435         case NL80211_IFTYPE_P2P_DEVICE:
7436                 break;
7437         default:
7438                 return -EOPNOTSUPP;
7439         }
7440
7441         /* not much point in registering if we can't reply */
7442         if (!rdev->ops->mgmt_tx)
7443                 return -EOPNOTSUPP;
7444
7445         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7446                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7447                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7448 }
7449
7450 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7451 {
7452         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7453         struct wireless_dev *wdev = info->user_ptr[1];
7454         struct cfg80211_chan_def chandef;
7455         int err;
7456         void *hdr = NULL;
7457         u64 cookie;
7458         struct sk_buff *msg = NULL;
7459         struct cfg80211_mgmt_tx_params params = {
7460                 .dont_wait_for_ack =
7461                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7462         };
7463
7464         if (!info->attrs[NL80211_ATTR_FRAME])
7465                 return -EINVAL;
7466
7467         if (!rdev->ops->mgmt_tx)
7468                 return -EOPNOTSUPP;
7469
7470         switch (wdev->iftype) {
7471         case NL80211_IFTYPE_P2P_DEVICE:
7472                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7473                         return -EINVAL;
7474         case NL80211_IFTYPE_STATION:
7475         case NL80211_IFTYPE_ADHOC:
7476         case NL80211_IFTYPE_P2P_CLIENT:
7477         case NL80211_IFTYPE_AP:
7478         case NL80211_IFTYPE_AP_VLAN:
7479         case NL80211_IFTYPE_MESH_POINT:
7480         case NL80211_IFTYPE_P2P_GO:
7481                 break;
7482         default:
7483                 return -EOPNOTSUPP;
7484         }
7485
7486         if (info->attrs[NL80211_ATTR_DURATION]) {
7487                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7488                         return -EINVAL;
7489                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7490
7491                 /*
7492                  * We should wait on the channel for at least a minimum amount
7493                  * of time (10ms) but no longer than the driver supports.
7494                  */
7495                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7496                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7497                         return -EINVAL;
7498
7499         }
7500
7501         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7502
7503         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7504                 return -EINVAL;
7505
7506         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7507
7508         /* get the channel if any has been specified, otherwise pass NULL to
7509          * the driver. The latter will use the current one
7510          */
7511         chandef.chan = NULL;
7512         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7513                 err = nl80211_parse_chandef(rdev, info, &chandef);
7514                 if (err)
7515                         return err;
7516         }
7517
7518         if (!chandef.chan && params.offchan)
7519                 return -EINVAL;
7520
7521         if (!params.dont_wait_for_ack) {
7522                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7523                 if (!msg)
7524                         return -ENOMEM;
7525
7526                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7527                                      NL80211_CMD_FRAME);
7528                 if (!hdr) {
7529                         err = -ENOBUFS;
7530                         goto free_msg;
7531                 }
7532         }
7533
7534         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7535         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7536         params.chan = chandef.chan;
7537         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7538         if (err)
7539                 goto free_msg;
7540
7541         if (msg) {
7542                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7543                         goto nla_put_failure;
7544
7545                 genlmsg_end(msg, hdr);
7546                 return genlmsg_reply(msg, info);
7547         }
7548
7549         return 0;
7550
7551  nla_put_failure:
7552         err = -ENOBUFS;
7553  free_msg:
7554         nlmsg_free(msg);
7555         return err;
7556 }
7557
7558 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7559 {
7560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7561         struct wireless_dev *wdev = info->user_ptr[1];
7562         u64 cookie;
7563
7564         if (!info->attrs[NL80211_ATTR_COOKIE])
7565                 return -EINVAL;
7566
7567         if (!rdev->ops->mgmt_tx_cancel_wait)
7568                 return -EOPNOTSUPP;
7569
7570         switch (wdev->iftype) {
7571         case NL80211_IFTYPE_STATION:
7572         case NL80211_IFTYPE_ADHOC:
7573         case NL80211_IFTYPE_P2P_CLIENT:
7574         case NL80211_IFTYPE_AP:
7575         case NL80211_IFTYPE_AP_VLAN:
7576         case NL80211_IFTYPE_P2P_GO:
7577         case NL80211_IFTYPE_P2P_DEVICE:
7578                 break;
7579         default:
7580                 return -EOPNOTSUPP;
7581         }
7582
7583         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7584
7585         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7586 }
7587
7588 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7589 {
7590         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7591         struct wireless_dev *wdev;
7592         struct net_device *dev = info->user_ptr[1];
7593         u8 ps_state;
7594         bool state;
7595         int err;
7596
7597         if (!info->attrs[NL80211_ATTR_PS_STATE])
7598                 return -EINVAL;
7599
7600         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7601
7602         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7603                 return -EINVAL;
7604
7605         wdev = dev->ieee80211_ptr;
7606
7607         if (!rdev->ops->set_power_mgmt)
7608                 return -EOPNOTSUPP;
7609
7610         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7611
7612         if (state == wdev->ps)
7613                 return 0;
7614
7615         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7616         if (!err)
7617                 wdev->ps = state;
7618         return err;
7619 }
7620
7621 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7622 {
7623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7624         enum nl80211_ps_state ps_state;
7625         struct wireless_dev *wdev;
7626         struct net_device *dev = info->user_ptr[1];
7627         struct sk_buff *msg;
7628         void *hdr;
7629         int err;
7630
7631         wdev = dev->ieee80211_ptr;
7632
7633         if (!rdev->ops->set_power_mgmt)
7634                 return -EOPNOTSUPP;
7635
7636         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7637         if (!msg)
7638                 return -ENOMEM;
7639
7640         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7641                              NL80211_CMD_GET_POWER_SAVE);
7642         if (!hdr) {
7643                 err = -ENOBUFS;
7644                 goto free_msg;
7645         }
7646
7647         if (wdev->ps)
7648                 ps_state = NL80211_PS_ENABLED;
7649         else
7650                 ps_state = NL80211_PS_DISABLED;
7651
7652         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7653                 goto nla_put_failure;
7654
7655         genlmsg_end(msg, hdr);
7656         return genlmsg_reply(msg, info);
7657
7658  nla_put_failure:
7659         err = -ENOBUFS;
7660  free_msg:
7661         nlmsg_free(msg);
7662         return err;
7663 }
7664
7665 static struct nla_policy
7666 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7667         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7668         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7669         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7670         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7671         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7672         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7673 };
7674
7675 static int nl80211_set_cqm_txe(struct genl_info *info,
7676                                u32 rate, u32 pkts, u32 intvl)
7677 {
7678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7679         struct net_device *dev = info->user_ptr[1];
7680         struct wireless_dev *wdev = dev->ieee80211_ptr;
7681
7682         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7683                 return -EINVAL;
7684
7685         if (!rdev->ops->set_cqm_txe_config)
7686                 return -EOPNOTSUPP;
7687
7688         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7689             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7690                 return -EOPNOTSUPP;
7691
7692         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7693 }
7694
7695 static int nl80211_set_cqm_rssi(struct genl_info *info,
7696                                 s32 threshold, u32 hysteresis)
7697 {
7698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7699         struct net_device *dev = info->user_ptr[1];
7700         struct wireless_dev *wdev = dev->ieee80211_ptr;
7701
7702         if (threshold > 0)
7703                 return -EINVAL;
7704
7705         /* disabling - hysteresis should also be zero then */
7706         if (threshold == 0)
7707                 hysteresis = 0;
7708
7709         if (!rdev->ops->set_cqm_rssi_config)
7710                 return -EOPNOTSUPP;
7711
7712         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7713             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7714                 return -EOPNOTSUPP;
7715
7716         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7717 }
7718
7719 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7720 {
7721         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7722         struct nlattr *cqm;
7723         int err;
7724
7725         cqm = info->attrs[NL80211_ATTR_CQM];
7726         if (!cqm)
7727                 return -EINVAL;
7728
7729         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7730                                nl80211_attr_cqm_policy);
7731         if (err)
7732                 return err;
7733
7734         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7735             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7736                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7737                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7738
7739                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7740         }
7741
7742         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7743             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7744             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7745                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7746                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7747                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7748
7749                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7750         }
7751
7752         return -EINVAL;
7753 }
7754
7755 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7756 {
7757         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7758         struct net_device *dev = info->user_ptr[1];
7759         struct mesh_config cfg;
7760         struct mesh_setup setup;
7761         int err;
7762
7763         /* start with default */
7764         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7765         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7766
7767         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7768                 /* and parse parameters if given */
7769                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7770                 if (err)
7771                         return err;
7772         }
7773
7774         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7775             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7776                 return -EINVAL;
7777
7778         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7779         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7780
7781         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7782             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7783                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7784                         return -EINVAL;
7785
7786         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7787                 setup.beacon_interval =
7788                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7789                 if (setup.beacon_interval < 10 ||
7790                     setup.beacon_interval > 10000)
7791                         return -EINVAL;
7792         }
7793
7794         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7795                 setup.dtim_period =
7796                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7797                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7798                         return -EINVAL;
7799         }
7800
7801         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7802                 /* parse additional setup parameters if given */
7803                 err = nl80211_parse_mesh_setup(info, &setup);
7804                 if (err)
7805                         return err;
7806         }
7807
7808         if (setup.user_mpm)
7809                 cfg.auto_open_plinks = false;
7810
7811         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7812                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7813                 if (err)
7814                         return err;
7815         } else {
7816                 /* cfg80211_join_mesh() will sort it out */
7817                 setup.chandef.chan = NULL;
7818         }
7819
7820         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7821                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7822                 int n_rates =
7823                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7824                 struct ieee80211_supported_band *sband;
7825
7826                 if (!setup.chandef.chan)
7827                         return -EINVAL;
7828
7829                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7830
7831                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7832                                              &setup.basic_rates);
7833                 if (err)
7834                         return err;
7835         }
7836
7837         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7838 }
7839
7840 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7841 {
7842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7843         struct net_device *dev = info->user_ptr[1];
7844
7845         return cfg80211_leave_mesh(rdev, dev);
7846 }
7847
7848 #ifdef CONFIG_PM
7849 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7850                                         struct cfg80211_registered_device *rdev)
7851 {
7852         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7853         struct nlattr *nl_pats, *nl_pat;
7854         int i, pat_len;
7855
7856         if (!wowlan->n_patterns)
7857                 return 0;
7858
7859         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7860         if (!nl_pats)
7861                 return -ENOBUFS;
7862
7863         for (i = 0; i < wowlan->n_patterns; i++) {
7864                 nl_pat = nla_nest_start(msg, i + 1);
7865                 if (!nl_pat)
7866                         return -ENOBUFS;
7867                 pat_len = wowlan->patterns[i].pattern_len;
7868                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7869                             wowlan->patterns[i].mask) ||
7870                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7871                             wowlan->patterns[i].pattern) ||
7872                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7873                                 wowlan->patterns[i].pkt_offset))
7874                         return -ENOBUFS;
7875                 nla_nest_end(msg, nl_pat);
7876         }
7877         nla_nest_end(msg, nl_pats);
7878
7879         return 0;
7880 }
7881
7882 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7883                                    struct cfg80211_wowlan_tcp *tcp)
7884 {
7885         struct nlattr *nl_tcp;
7886
7887         if (!tcp)
7888                 return 0;
7889
7890         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7891         if (!nl_tcp)
7892                 return -ENOBUFS;
7893
7894         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7895             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7896             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7897             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7898             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7899             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7900                     tcp->payload_len, tcp->payload) ||
7901             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7902                         tcp->data_interval) ||
7903             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7904                     tcp->wake_len, tcp->wake_data) ||
7905             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7906                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7907                 return -ENOBUFS;
7908
7909         if (tcp->payload_seq.len &&
7910             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7911                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7912                 return -ENOBUFS;
7913
7914         if (tcp->payload_tok.len &&
7915             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7916                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7917                     &tcp->payload_tok))
7918                 return -ENOBUFS;
7919
7920         nla_nest_end(msg, nl_tcp);
7921
7922         return 0;
7923 }
7924
7925 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7926 {
7927         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7928         struct sk_buff *msg;
7929         void *hdr;
7930         u32 size = NLMSG_DEFAULT_SIZE;
7931
7932         if (!rdev->wiphy.wowlan)
7933                 return -EOPNOTSUPP;
7934
7935         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7936                 /* adjust size to have room for all the data */
7937                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7938                         rdev->wiphy.wowlan_config->tcp->payload_len +
7939                         rdev->wiphy.wowlan_config->tcp->wake_len +
7940                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7941         }
7942
7943         msg = nlmsg_new(size, GFP_KERNEL);
7944         if (!msg)
7945                 return -ENOMEM;
7946
7947         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7948                              NL80211_CMD_GET_WOWLAN);
7949         if (!hdr)
7950                 goto nla_put_failure;
7951
7952         if (rdev->wiphy.wowlan_config) {
7953                 struct nlattr *nl_wowlan;
7954
7955                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7956                 if (!nl_wowlan)
7957                         goto nla_put_failure;
7958
7959                 if ((rdev->wiphy.wowlan_config->any &&
7960                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7961                     (rdev->wiphy.wowlan_config->disconnect &&
7962                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7963                     (rdev->wiphy.wowlan_config->magic_pkt &&
7964                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7965                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7966                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7967                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7968                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7969                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7970                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7971                     (rdev->wiphy.wowlan_config->rfkill_release &&
7972                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7973                         goto nla_put_failure;
7974
7975                 if (nl80211_send_wowlan_patterns(msg, rdev))
7976                         goto nla_put_failure;
7977
7978                 if (nl80211_send_wowlan_tcp(msg,
7979                                             rdev->wiphy.wowlan_config->tcp))
7980                         goto nla_put_failure;
7981
7982                 nla_nest_end(msg, nl_wowlan);
7983         }
7984
7985         genlmsg_end(msg, hdr);
7986         return genlmsg_reply(msg, info);
7987
7988 nla_put_failure:
7989         nlmsg_free(msg);
7990         return -ENOBUFS;
7991 }
7992
7993 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7994                                     struct nlattr *attr,
7995                                     struct cfg80211_wowlan *trig)
7996 {
7997         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7998         struct cfg80211_wowlan_tcp *cfg;
7999         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8000         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8001         u32 size;
8002         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8003         int err, port;
8004
8005         if (!rdev->wiphy.wowlan->tcp)
8006                 return -EINVAL;
8007
8008         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8009                         nla_data(attr), nla_len(attr),
8010                         nl80211_wowlan_tcp_policy);
8011         if (err)
8012                 return err;
8013
8014         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8015             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8016             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8017             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8018             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8019             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8020             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8021             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8022                 return -EINVAL;
8023
8024         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8025         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8026                 return -EINVAL;
8027
8028         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8029                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8030             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8031                 return -EINVAL;
8032
8033         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8034         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8035                 return -EINVAL;
8036
8037         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8038         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8039                 return -EINVAL;
8040
8041         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8042                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8043
8044                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8045                 tokens_size = tokln - sizeof(*tok);
8046
8047                 if (!tok->len || tokens_size % tok->len)
8048                         return -EINVAL;
8049                 if (!rdev->wiphy.wowlan->tcp->tok)
8050                         return -EINVAL;
8051                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8052                         return -EINVAL;
8053                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8054                         return -EINVAL;
8055                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8056                         return -EINVAL;
8057                 if (tok->offset + tok->len > data_size)
8058                         return -EINVAL;
8059         }
8060
8061         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8062                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8063                 if (!rdev->wiphy.wowlan->tcp->seq)
8064                         return -EINVAL;
8065                 if (seq->len == 0 || seq->len > 4)
8066                         return -EINVAL;
8067                 if (seq->len + seq->offset > data_size)
8068                         return -EINVAL;
8069         }
8070
8071         size = sizeof(*cfg);
8072         size += data_size;
8073         size += wake_size + wake_mask_size;
8074         size += tokens_size;
8075
8076         cfg = kzalloc(size, GFP_KERNEL);
8077         if (!cfg)
8078                 return -ENOMEM;
8079         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8080         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8081         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8082                ETH_ALEN);
8083         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8084                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8085         else
8086                 port = 0;
8087 #ifdef CONFIG_INET
8088         /* allocate a socket and port for it and use it */
8089         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8090                             IPPROTO_TCP, &cfg->sock, 1);
8091         if (err) {
8092                 kfree(cfg);
8093                 return err;
8094         }
8095         if (inet_csk_get_port(cfg->sock->sk, port)) {
8096                 sock_release(cfg->sock);
8097                 kfree(cfg);
8098                 return -EADDRINUSE;
8099         }
8100         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8101 #else
8102         if (!port) {
8103                 kfree(cfg);
8104                 return -EINVAL;
8105         }
8106         cfg->src_port = port;
8107 #endif
8108
8109         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8110         cfg->payload_len = data_size;
8111         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8112         memcpy((void *)cfg->payload,
8113                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8114                data_size);
8115         if (seq)
8116                 cfg->payload_seq = *seq;
8117         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8118         cfg->wake_len = wake_size;
8119         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8120         memcpy((void *)cfg->wake_data,
8121                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8122                wake_size);
8123         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8124                          data_size + wake_size;
8125         memcpy((void *)cfg->wake_mask,
8126                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8127                wake_mask_size);
8128         if (tok) {
8129                 cfg->tokens_size = tokens_size;
8130                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8131         }
8132
8133         trig->tcp = cfg;
8134
8135         return 0;
8136 }
8137
8138 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8139 {
8140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8141         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8142         struct cfg80211_wowlan new_triggers = {};
8143         struct cfg80211_wowlan *ntrig;
8144         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8145         int err, i;
8146         bool prev_enabled = rdev->wiphy.wowlan_config;
8147
8148         if (!wowlan)
8149                 return -EOPNOTSUPP;
8150
8151         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8152                 cfg80211_rdev_free_wowlan(rdev);
8153                 rdev->wiphy.wowlan_config = NULL;
8154                 goto set_wakeup;
8155         }
8156
8157         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8158                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8159                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8160                         nl80211_wowlan_policy);
8161         if (err)
8162                 return err;
8163
8164         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8165                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8166                         return -EINVAL;
8167                 new_triggers.any = true;
8168         }
8169
8170         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8171                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8172                         return -EINVAL;
8173                 new_triggers.disconnect = true;
8174         }
8175
8176         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8177                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8178                         return -EINVAL;
8179                 new_triggers.magic_pkt = true;
8180         }
8181
8182         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8183                 return -EINVAL;
8184
8185         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8186                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8187                         return -EINVAL;
8188                 new_triggers.gtk_rekey_failure = true;
8189         }
8190
8191         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8192                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8193                         return -EINVAL;
8194                 new_triggers.eap_identity_req = true;
8195         }
8196
8197         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8198                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8199                         return -EINVAL;
8200                 new_triggers.four_way_handshake = true;
8201         }
8202
8203         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8204                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8205                         return -EINVAL;
8206                 new_triggers.rfkill_release = true;
8207         }
8208
8209         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8210                 struct nlattr *pat;
8211                 int n_patterns = 0;
8212                 int rem, pat_len, mask_len, pkt_offset;
8213                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8214
8215                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8216                                     rem)
8217                         n_patterns++;
8218                 if (n_patterns > wowlan->n_patterns)
8219                         return -EINVAL;
8220
8221                 new_triggers.patterns = kcalloc(n_patterns,
8222                                                 sizeof(new_triggers.patterns[0]),
8223                                                 GFP_KERNEL);
8224                 if (!new_triggers.patterns)
8225                         return -ENOMEM;
8226
8227                 new_triggers.n_patterns = n_patterns;
8228                 i = 0;
8229
8230                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8231                                     rem) {
8232                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8233                                   nla_len(pat), NULL);
8234                         err = -EINVAL;
8235                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8236                             !pat_tb[NL80211_PKTPAT_PATTERN])
8237                                 goto error;
8238                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8239                         mask_len = DIV_ROUND_UP(pat_len, 8);
8240                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8241                                 goto error;
8242                         if (pat_len > wowlan->pattern_max_len ||
8243                             pat_len < wowlan->pattern_min_len)
8244                                 goto error;
8245
8246                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8247                                 pkt_offset = 0;
8248                         else
8249                                 pkt_offset = nla_get_u32(
8250                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8251                         if (pkt_offset > wowlan->max_pkt_offset)
8252                                 goto error;
8253                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8254
8255                         new_triggers.patterns[i].mask =
8256                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8257                         if (!new_triggers.patterns[i].mask) {
8258                                 err = -ENOMEM;
8259                                 goto error;
8260                         }
8261                         new_triggers.patterns[i].pattern =
8262                                 new_triggers.patterns[i].mask + mask_len;
8263                         memcpy(new_triggers.patterns[i].mask,
8264                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8265                                mask_len);
8266                         new_triggers.patterns[i].pattern_len = pat_len;
8267                         memcpy(new_triggers.patterns[i].pattern,
8268                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8269                                pat_len);
8270                         i++;
8271                 }
8272         }
8273
8274         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8275                 err = nl80211_parse_wowlan_tcp(
8276                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8277                         &new_triggers);
8278                 if (err)
8279                         goto error;
8280         }
8281
8282         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8283         if (!ntrig) {
8284                 err = -ENOMEM;
8285                 goto error;
8286         }
8287         cfg80211_rdev_free_wowlan(rdev);
8288         rdev->wiphy.wowlan_config = ntrig;
8289
8290  set_wakeup:
8291         if (rdev->ops->set_wakeup &&
8292             prev_enabled != !!rdev->wiphy.wowlan_config)
8293                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8294
8295         return 0;
8296  error:
8297         for (i = 0; i < new_triggers.n_patterns; i++)
8298                 kfree(new_triggers.patterns[i].mask);
8299         kfree(new_triggers.patterns);
8300         if (new_triggers.tcp && new_triggers.tcp->sock)
8301                 sock_release(new_triggers.tcp->sock);
8302         kfree(new_triggers.tcp);
8303         return err;
8304 }
8305 #endif
8306
8307 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8308                                        struct cfg80211_registered_device *rdev)
8309 {
8310         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8311         int i, j, pat_len;
8312         struct cfg80211_coalesce_rules *rule;
8313
8314         if (!rdev->coalesce->n_rules)
8315                 return 0;
8316
8317         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8318         if (!nl_rules)
8319                 return -ENOBUFS;
8320
8321         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8322                 nl_rule = nla_nest_start(msg, i + 1);
8323                 if (!nl_rule)
8324                         return -ENOBUFS;
8325
8326                 rule = &rdev->coalesce->rules[i];
8327                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8328                                 rule->delay))
8329                         return -ENOBUFS;
8330
8331                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8332                                 rule->condition))
8333                         return -ENOBUFS;
8334
8335                 nl_pats = nla_nest_start(msg,
8336                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8337                 if (!nl_pats)
8338                         return -ENOBUFS;
8339
8340                 for (j = 0; j < rule->n_patterns; j++) {
8341                         nl_pat = nla_nest_start(msg, j + 1);
8342                         if (!nl_pat)
8343                                 return -ENOBUFS;
8344                         pat_len = rule->patterns[j].pattern_len;
8345                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8346                                     DIV_ROUND_UP(pat_len, 8),
8347                                     rule->patterns[j].mask) ||
8348                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8349                                     rule->patterns[j].pattern) ||
8350                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8351                                         rule->patterns[j].pkt_offset))
8352                                 return -ENOBUFS;
8353                         nla_nest_end(msg, nl_pat);
8354                 }
8355                 nla_nest_end(msg, nl_pats);
8356                 nla_nest_end(msg, nl_rule);
8357         }
8358         nla_nest_end(msg, nl_rules);
8359
8360         return 0;
8361 }
8362
8363 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8364 {
8365         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8366         struct sk_buff *msg;
8367         void *hdr;
8368
8369         if (!rdev->wiphy.coalesce)
8370                 return -EOPNOTSUPP;
8371
8372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8373         if (!msg)
8374                 return -ENOMEM;
8375
8376         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8377                              NL80211_CMD_GET_COALESCE);
8378         if (!hdr)
8379                 goto nla_put_failure;
8380
8381         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8382                 goto nla_put_failure;
8383
8384         genlmsg_end(msg, hdr);
8385         return genlmsg_reply(msg, info);
8386
8387 nla_put_failure:
8388         nlmsg_free(msg);
8389         return -ENOBUFS;
8390 }
8391
8392 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8393 {
8394         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8395         int i, j;
8396         struct cfg80211_coalesce_rules *rule;
8397
8398         if (!coalesce)
8399                 return;
8400
8401         for (i = 0; i < coalesce->n_rules; i++) {
8402                 rule = &coalesce->rules[i];
8403                 for (j = 0; j < rule->n_patterns; j++)
8404                         kfree(rule->patterns[j].mask);
8405                 kfree(rule->patterns);
8406         }
8407         kfree(coalesce->rules);
8408         kfree(coalesce);
8409         rdev->coalesce = NULL;
8410 }
8411
8412 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8413                                        struct nlattr *rule,
8414                                        struct cfg80211_coalesce_rules *new_rule)
8415 {
8416         int err, i;
8417         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8418         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8419         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8420         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8421
8422         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8423                         nla_len(rule), nl80211_coalesce_policy);
8424         if (err)
8425                 return err;
8426
8427         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8428                 new_rule->delay =
8429                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8430         if (new_rule->delay > coalesce->max_delay)
8431                 return -EINVAL;
8432
8433         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8434                 new_rule->condition =
8435                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8436         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8437             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8438                 return -EINVAL;
8439
8440         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8441                 return -EINVAL;
8442
8443         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8444                             rem)
8445                 n_patterns++;
8446         if (n_patterns > coalesce->n_patterns)
8447                 return -EINVAL;
8448
8449         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8450                                      GFP_KERNEL);
8451         if (!new_rule->patterns)
8452                 return -ENOMEM;
8453
8454         new_rule->n_patterns = n_patterns;
8455         i = 0;
8456
8457         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8458                             rem) {
8459                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8460                           nla_len(pat), NULL);
8461                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8462                     !pat_tb[NL80211_PKTPAT_PATTERN])
8463                         return -EINVAL;
8464                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8465                 mask_len = DIV_ROUND_UP(pat_len, 8);
8466                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8467                         return -EINVAL;
8468                 if (pat_len > coalesce->pattern_max_len ||
8469                     pat_len < coalesce->pattern_min_len)
8470                         return -EINVAL;
8471
8472                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8473                         pkt_offset = 0;
8474                 else
8475                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8476                 if (pkt_offset > coalesce->max_pkt_offset)
8477                         return -EINVAL;
8478                 new_rule->patterns[i].pkt_offset = pkt_offset;
8479
8480                 new_rule->patterns[i].mask =
8481                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8482                 if (!new_rule->patterns[i].mask)
8483                         return -ENOMEM;
8484                 new_rule->patterns[i].pattern =
8485                         new_rule->patterns[i].mask + mask_len;
8486                 memcpy(new_rule->patterns[i].mask,
8487                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8488                 new_rule->patterns[i].pattern_len = pat_len;
8489                 memcpy(new_rule->patterns[i].pattern,
8490                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8491                 i++;
8492         }
8493
8494         return 0;
8495 }
8496
8497 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8498 {
8499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8500         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8501         struct cfg80211_coalesce new_coalesce = {};
8502         struct cfg80211_coalesce *n_coalesce;
8503         int err, rem_rule, n_rules = 0, i, j;
8504         struct nlattr *rule;
8505         struct cfg80211_coalesce_rules *tmp_rule;
8506
8507         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8508                 return -EOPNOTSUPP;
8509
8510         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8511                 cfg80211_rdev_free_coalesce(rdev);
8512                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8513                 return 0;
8514         }
8515
8516         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8517                             rem_rule)
8518                 n_rules++;
8519         if (n_rules > coalesce->n_rules)
8520                 return -EINVAL;
8521
8522         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8523                                      GFP_KERNEL);
8524         if (!new_coalesce.rules)
8525                 return -ENOMEM;
8526
8527         new_coalesce.n_rules = n_rules;
8528         i = 0;
8529
8530         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8531                             rem_rule) {
8532                 err = nl80211_parse_coalesce_rule(rdev, rule,
8533                                                   &new_coalesce.rules[i]);
8534                 if (err)
8535                         goto error;
8536
8537                 i++;
8538         }
8539
8540         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8541         if (err)
8542                 goto error;
8543
8544         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8545         if (!n_coalesce) {
8546                 err = -ENOMEM;
8547                 goto error;
8548         }
8549         cfg80211_rdev_free_coalesce(rdev);
8550         rdev->coalesce = n_coalesce;
8551
8552         return 0;
8553 error:
8554         for (i = 0; i < new_coalesce.n_rules; i++) {
8555                 tmp_rule = &new_coalesce.rules[i];
8556                 for (j = 0; j < tmp_rule->n_patterns; j++)
8557                         kfree(tmp_rule->patterns[j].mask);
8558                 kfree(tmp_rule->patterns);
8559         }
8560         kfree(new_coalesce.rules);
8561
8562         return err;
8563 }
8564
8565 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8566 {
8567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8568         struct net_device *dev = info->user_ptr[1];
8569         struct wireless_dev *wdev = dev->ieee80211_ptr;
8570         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8571         struct cfg80211_gtk_rekey_data rekey_data;
8572         int err;
8573
8574         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8575                 return -EINVAL;
8576
8577         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8578                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8579                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8580                         nl80211_rekey_policy);
8581         if (err)
8582                 return err;
8583
8584         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8585                 return -ERANGE;
8586         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8587                 return -ERANGE;
8588         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8589                 return -ERANGE;
8590
8591         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8592                NL80211_KEK_LEN);
8593         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8594                NL80211_KCK_LEN);
8595         memcpy(rekey_data.replay_ctr,
8596                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8597                NL80211_REPLAY_CTR_LEN);
8598
8599         wdev_lock(wdev);
8600         if (!wdev->current_bss) {
8601                 err = -ENOTCONN;
8602                 goto out;
8603         }
8604
8605         if (!rdev->ops->set_rekey_data) {
8606                 err = -EOPNOTSUPP;
8607                 goto out;
8608         }
8609
8610         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8611  out:
8612         wdev_unlock(wdev);
8613         return err;
8614 }
8615
8616 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8617                                              struct genl_info *info)
8618 {
8619         struct net_device *dev = info->user_ptr[1];
8620         struct wireless_dev *wdev = dev->ieee80211_ptr;
8621
8622         if (wdev->iftype != NL80211_IFTYPE_AP &&
8623             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8624                 return -EINVAL;
8625
8626         if (wdev->ap_unexpected_nlportid)
8627                 return -EBUSY;
8628
8629         wdev->ap_unexpected_nlportid = info->snd_portid;
8630         return 0;
8631 }
8632
8633 static int nl80211_probe_client(struct sk_buff *skb,
8634                                 struct genl_info *info)
8635 {
8636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8637         struct net_device *dev = info->user_ptr[1];
8638         struct wireless_dev *wdev = dev->ieee80211_ptr;
8639         struct sk_buff *msg;
8640         void *hdr;
8641         const u8 *addr;
8642         u64 cookie;
8643         int err;
8644
8645         if (wdev->iftype != NL80211_IFTYPE_AP &&
8646             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8647                 return -EOPNOTSUPP;
8648
8649         if (!info->attrs[NL80211_ATTR_MAC])
8650                 return -EINVAL;
8651
8652         if (!rdev->ops->probe_client)
8653                 return -EOPNOTSUPP;
8654
8655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8656         if (!msg)
8657                 return -ENOMEM;
8658
8659         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8660                              NL80211_CMD_PROBE_CLIENT);
8661         if (!hdr) {
8662                 err = -ENOBUFS;
8663                 goto free_msg;
8664         }
8665
8666         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8667
8668         err = rdev_probe_client(rdev, dev, addr, &cookie);
8669         if (err)
8670                 goto free_msg;
8671
8672         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8673                 goto nla_put_failure;
8674
8675         genlmsg_end(msg, hdr);
8676
8677         return genlmsg_reply(msg, info);
8678
8679  nla_put_failure:
8680         err = -ENOBUFS;
8681  free_msg:
8682         nlmsg_free(msg);
8683         return err;
8684 }
8685
8686 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8687 {
8688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8689         struct cfg80211_beacon_registration *reg, *nreg;
8690         int rv;
8691
8692         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8693                 return -EOPNOTSUPP;
8694
8695         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8696         if (!nreg)
8697                 return -ENOMEM;
8698
8699         /* First, check if already registered. */
8700         spin_lock_bh(&rdev->beacon_registrations_lock);
8701         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8702                 if (reg->nlportid == info->snd_portid) {
8703                         rv = -EALREADY;
8704                         goto out_err;
8705                 }
8706         }
8707         /* Add it to the list */
8708         nreg->nlportid = info->snd_portid;
8709         list_add(&nreg->list, &rdev->beacon_registrations);
8710
8711         spin_unlock_bh(&rdev->beacon_registrations_lock);
8712
8713         return 0;
8714 out_err:
8715         spin_unlock_bh(&rdev->beacon_registrations_lock);
8716         kfree(nreg);
8717         return rv;
8718 }
8719
8720 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8721 {
8722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8723         struct wireless_dev *wdev = info->user_ptr[1];
8724         int err;
8725
8726         if (!rdev->ops->start_p2p_device)
8727                 return -EOPNOTSUPP;
8728
8729         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8730                 return -EOPNOTSUPP;
8731
8732         if (wdev->p2p_started)
8733                 return 0;
8734
8735         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8736         if (err)
8737                 return err;
8738
8739         err = rdev_start_p2p_device(rdev, wdev);
8740         if (err)
8741                 return err;
8742
8743         wdev->p2p_started = true;
8744         rdev->opencount++;
8745
8746         return 0;
8747 }
8748
8749 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8750 {
8751         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8752         struct wireless_dev *wdev = info->user_ptr[1];
8753
8754         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8755                 return -EOPNOTSUPP;
8756
8757         if (!rdev->ops->stop_p2p_device)
8758                 return -EOPNOTSUPP;
8759
8760         cfg80211_stop_p2p_device(rdev, wdev);
8761
8762         return 0;
8763 }
8764
8765 static int nl80211_get_protocol_features(struct sk_buff *skb,
8766                                          struct genl_info *info)
8767 {
8768         void *hdr;
8769         struct sk_buff *msg;
8770
8771         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8772         if (!msg)
8773                 return -ENOMEM;
8774
8775         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8776                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8777         if (!hdr)
8778                 goto nla_put_failure;
8779
8780         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8781                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8782                 goto nla_put_failure;
8783
8784         genlmsg_end(msg, hdr);
8785         return genlmsg_reply(msg, info);
8786
8787  nla_put_failure:
8788         kfree_skb(msg);
8789         return -ENOBUFS;
8790 }
8791
8792 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8793 {
8794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8795         struct cfg80211_update_ft_ies_params ft_params;
8796         struct net_device *dev = info->user_ptr[1];
8797
8798         if (!rdev->ops->update_ft_ies)
8799                 return -EOPNOTSUPP;
8800
8801         if (!info->attrs[NL80211_ATTR_MDID] ||
8802             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8803                 return -EINVAL;
8804
8805         memset(&ft_params, 0, sizeof(ft_params));
8806         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8807         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8808         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8809
8810         return rdev_update_ft_ies(rdev, dev, &ft_params);
8811 }
8812
8813 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8814                                        struct genl_info *info)
8815 {
8816         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8817         struct wireless_dev *wdev = info->user_ptr[1];
8818         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8819         u16 duration;
8820         int ret;
8821
8822         if (!rdev->ops->crit_proto_start)
8823                 return -EOPNOTSUPP;
8824
8825         if (WARN_ON(!rdev->ops->crit_proto_stop))
8826                 return -EINVAL;
8827
8828         if (rdev->crit_proto_nlportid)
8829                 return -EBUSY;
8830
8831         /* determine protocol if provided */
8832         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8833                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8834
8835         if (proto >= NUM_NL80211_CRIT_PROTO)
8836                 return -EINVAL;
8837
8838         /* timeout must be provided */
8839         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8840                 return -EINVAL;
8841
8842         duration =
8843                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8844
8845         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8846                 return -ERANGE;
8847
8848         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8849         if (!ret)
8850                 rdev->crit_proto_nlportid = info->snd_portid;
8851
8852         return ret;
8853 }
8854
8855 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8856                                       struct genl_info *info)
8857 {
8858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8859         struct wireless_dev *wdev = info->user_ptr[1];
8860
8861         if (!rdev->ops->crit_proto_stop)
8862                 return -EOPNOTSUPP;
8863
8864         if (rdev->crit_proto_nlportid) {
8865                 rdev->crit_proto_nlportid = 0;
8866                 rdev_crit_proto_stop(rdev, wdev);
8867         }
8868         return 0;
8869 }
8870
8871 #define NL80211_FLAG_NEED_WIPHY         0x01
8872 #define NL80211_FLAG_NEED_NETDEV        0x02
8873 #define NL80211_FLAG_NEED_RTNL          0x04
8874 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8875 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8876                                          NL80211_FLAG_CHECK_NETDEV_UP)
8877 #define NL80211_FLAG_NEED_WDEV          0x10
8878 /* If a netdev is associated, it must be UP, P2P must be started */
8879 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8880                                          NL80211_FLAG_CHECK_NETDEV_UP)
8881
8882 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8883                             struct genl_info *info)
8884 {
8885         struct cfg80211_registered_device *rdev;
8886         struct wireless_dev *wdev;
8887         struct net_device *dev;
8888         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8889
8890         if (rtnl)
8891                 rtnl_lock();
8892
8893         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8894                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8895                 if (IS_ERR(rdev)) {
8896                         if (rtnl)
8897                                 rtnl_unlock();
8898                         return PTR_ERR(rdev);
8899                 }
8900                 info->user_ptr[0] = rdev;
8901         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8902                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8903                 ASSERT_RTNL();
8904
8905                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8906                                                   info->attrs);
8907                 if (IS_ERR(wdev)) {
8908                         if (rtnl)
8909                                 rtnl_unlock();
8910                         return PTR_ERR(wdev);
8911                 }
8912
8913                 dev = wdev->netdev;
8914                 rdev = wiphy_to_dev(wdev->wiphy);
8915
8916                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8917                         if (!dev) {
8918                                 if (rtnl)
8919                                         rtnl_unlock();
8920                                 return -EINVAL;
8921                         }
8922
8923                         info->user_ptr[1] = dev;
8924                 } else {
8925                         info->user_ptr[1] = wdev;
8926                 }
8927
8928                 if (dev) {
8929                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8930                             !netif_running(dev)) {
8931                                 if (rtnl)
8932                                         rtnl_unlock();
8933                                 return -ENETDOWN;
8934                         }
8935
8936                         dev_hold(dev);
8937                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8938                         if (!wdev->p2p_started) {
8939                                 if (rtnl)
8940                                         rtnl_unlock();
8941                                 return -ENETDOWN;
8942                         }
8943                 }
8944
8945                 info->user_ptr[0] = rdev;
8946         }
8947
8948         return 0;
8949 }
8950
8951 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8952                               struct genl_info *info)
8953 {
8954         if (info->user_ptr[1]) {
8955                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8956                         struct wireless_dev *wdev = info->user_ptr[1];
8957
8958                         if (wdev->netdev)
8959                                 dev_put(wdev->netdev);
8960                 } else {
8961                         dev_put(info->user_ptr[1]);
8962                 }
8963         }
8964         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8965                 rtnl_unlock();
8966 }
8967
8968 static struct genl_ops nl80211_ops[] = {
8969         {
8970                 .cmd = NL80211_CMD_GET_WIPHY,
8971                 .doit = nl80211_get_wiphy,
8972                 .dumpit = nl80211_dump_wiphy,
8973                 .done = nl80211_dump_wiphy_done,
8974                 .policy = nl80211_policy,
8975                 /* can be retrieved by unprivileged users */
8976                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8977                                   NL80211_FLAG_NEED_RTNL,
8978         },
8979         {
8980                 .cmd = NL80211_CMD_SET_WIPHY,
8981                 .doit = nl80211_set_wiphy,
8982                 .policy = nl80211_policy,
8983                 .flags = GENL_ADMIN_PERM,
8984                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8985         },
8986         {
8987                 .cmd = NL80211_CMD_GET_INTERFACE,
8988                 .doit = nl80211_get_interface,
8989                 .dumpit = nl80211_dump_interface,
8990                 .policy = nl80211_policy,
8991                 /* can be retrieved by unprivileged users */
8992                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8993                                   NL80211_FLAG_NEED_RTNL,
8994         },
8995         {
8996                 .cmd = NL80211_CMD_SET_INTERFACE,
8997                 .doit = nl80211_set_interface,
8998                 .policy = nl80211_policy,
8999                 .flags = GENL_ADMIN_PERM,
9000                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9001                                   NL80211_FLAG_NEED_RTNL,
9002         },
9003         {
9004                 .cmd = NL80211_CMD_NEW_INTERFACE,
9005                 .doit = nl80211_new_interface,
9006                 .policy = nl80211_policy,
9007                 .flags = GENL_ADMIN_PERM,
9008                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9009                                   NL80211_FLAG_NEED_RTNL,
9010         },
9011         {
9012                 .cmd = NL80211_CMD_DEL_INTERFACE,
9013                 .doit = nl80211_del_interface,
9014                 .policy = nl80211_policy,
9015                 .flags = GENL_ADMIN_PERM,
9016                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9017                                   NL80211_FLAG_NEED_RTNL,
9018         },
9019         {
9020                 .cmd = NL80211_CMD_GET_KEY,
9021                 .doit = nl80211_get_key,
9022                 .policy = nl80211_policy,
9023                 .flags = GENL_ADMIN_PERM,
9024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9025                                   NL80211_FLAG_NEED_RTNL,
9026         },
9027         {
9028                 .cmd = NL80211_CMD_SET_KEY,
9029                 .doit = nl80211_set_key,
9030                 .policy = nl80211_policy,
9031                 .flags = GENL_ADMIN_PERM,
9032                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9033                                   NL80211_FLAG_NEED_RTNL,
9034         },
9035         {
9036                 .cmd = NL80211_CMD_NEW_KEY,
9037                 .doit = nl80211_new_key,
9038                 .policy = nl80211_policy,
9039                 .flags = GENL_ADMIN_PERM,
9040                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9041                                   NL80211_FLAG_NEED_RTNL,
9042         },
9043         {
9044                 .cmd = NL80211_CMD_DEL_KEY,
9045                 .doit = nl80211_del_key,
9046                 .policy = nl80211_policy,
9047                 .flags = GENL_ADMIN_PERM,
9048                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9049                                   NL80211_FLAG_NEED_RTNL,
9050         },
9051         {
9052                 .cmd = NL80211_CMD_SET_BEACON,
9053                 .policy = nl80211_policy,
9054                 .flags = GENL_ADMIN_PERM,
9055                 .doit = nl80211_set_beacon,
9056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9057                                   NL80211_FLAG_NEED_RTNL,
9058         },
9059         {
9060                 .cmd = NL80211_CMD_START_AP,
9061                 .policy = nl80211_policy,
9062                 .flags = GENL_ADMIN_PERM,
9063                 .doit = nl80211_start_ap,
9064                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9065                                   NL80211_FLAG_NEED_RTNL,
9066         },
9067         {
9068                 .cmd = NL80211_CMD_STOP_AP,
9069                 .policy = nl80211_policy,
9070                 .flags = GENL_ADMIN_PERM,
9071                 .doit = nl80211_stop_ap,
9072                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9073                                   NL80211_FLAG_NEED_RTNL,
9074         },
9075         {
9076                 .cmd = NL80211_CMD_GET_STATION,
9077                 .doit = nl80211_get_station,
9078                 .dumpit = nl80211_dump_station,
9079                 .policy = nl80211_policy,
9080                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9081                                   NL80211_FLAG_NEED_RTNL,
9082         },
9083         {
9084                 .cmd = NL80211_CMD_SET_STATION,
9085                 .doit = nl80211_set_station,
9086                 .policy = nl80211_policy,
9087                 .flags = GENL_ADMIN_PERM,
9088                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9089                                   NL80211_FLAG_NEED_RTNL,
9090         },
9091         {
9092                 .cmd = NL80211_CMD_NEW_STATION,
9093                 .doit = nl80211_new_station,
9094                 .policy = nl80211_policy,
9095                 .flags = GENL_ADMIN_PERM,
9096                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9097                                   NL80211_FLAG_NEED_RTNL,
9098         },
9099         {
9100                 .cmd = NL80211_CMD_DEL_STATION,
9101                 .doit = nl80211_del_station,
9102                 .policy = nl80211_policy,
9103                 .flags = GENL_ADMIN_PERM,
9104                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9105                                   NL80211_FLAG_NEED_RTNL,
9106         },
9107         {
9108                 .cmd = NL80211_CMD_GET_MPATH,
9109                 .doit = nl80211_get_mpath,
9110                 .dumpit = nl80211_dump_mpath,
9111                 .policy = nl80211_policy,
9112                 .flags = GENL_ADMIN_PERM,
9113                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9114                                   NL80211_FLAG_NEED_RTNL,
9115         },
9116         {
9117                 .cmd = NL80211_CMD_SET_MPATH,
9118                 .doit = nl80211_set_mpath,
9119                 .policy = nl80211_policy,
9120                 .flags = GENL_ADMIN_PERM,
9121                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9122                                   NL80211_FLAG_NEED_RTNL,
9123         },
9124         {
9125                 .cmd = NL80211_CMD_NEW_MPATH,
9126                 .doit = nl80211_new_mpath,
9127                 .policy = nl80211_policy,
9128                 .flags = GENL_ADMIN_PERM,
9129                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9130                                   NL80211_FLAG_NEED_RTNL,
9131         },
9132         {
9133                 .cmd = NL80211_CMD_DEL_MPATH,
9134                 .doit = nl80211_del_mpath,
9135                 .policy = nl80211_policy,
9136                 .flags = GENL_ADMIN_PERM,
9137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9138                                   NL80211_FLAG_NEED_RTNL,
9139         },
9140         {
9141                 .cmd = NL80211_CMD_SET_BSS,
9142                 .doit = nl80211_set_bss,
9143                 .policy = nl80211_policy,
9144                 .flags = GENL_ADMIN_PERM,
9145                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9146                                   NL80211_FLAG_NEED_RTNL,
9147         },
9148         {
9149                 .cmd = NL80211_CMD_GET_REG,
9150                 .doit = nl80211_get_reg,
9151                 .policy = nl80211_policy,
9152                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9153                 /* can be retrieved by unprivileged users */
9154         },
9155         {
9156                 .cmd = NL80211_CMD_SET_REG,
9157                 .doit = nl80211_set_reg,
9158                 .policy = nl80211_policy,
9159                 .flags = GENL_ADMIN_PERM,
9160                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9161         },
9162         {
9163                 .cmd = NL80211_CMD_REQ_SET_REG,
9164                 .doit = nl80211_req_set_reg,
9165                 .policy = nl80211_policy,
9166                 .flags = GENL_ADMIN_PERM,
9167         },
9168         {
9169                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9170                 .doit = nl80211_get_mesh_config,
9171                 .policy = nl80211_policy,
9172                 /* can be retrieved by unprivileged users */
9173                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9174                                   NL80211_FLAG_NEED_RTNL,
9175         },
9176         {
9177                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9178                 .doit = nl80211_update_mesh_config,
9179                 .policy = nl80211_policy,
9180                 .flags = GENL_ADMIN_PERM,
9181                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9182                                   NL80211_FLAG_NEED_RTNL,
9183         },
9184         {
9185                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9186                 .doit = nl80211_trigger_scan,
9187                 .policy = nl80211_policy,
9188                 .flags = GENL_ADMIN_PERM,
9189                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9190                                   NL80211_FLAG_NEED_RTNL,
9191         },
9192         {
9193                 .cmd = NL80211_CMD_GET_SCAN,
9194                 .policy = nl80211_policy,
9195                 .dumpit = nl80211_dump_scan,
9196         },
9197         {
9198                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9199                 .doit = nl80211_start_sched_scan,
9200                 .policy = nl80211_policy,
9201                 .flags = GENL_ADMIN_PERM,
9202                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9203                                   NL80211_FLAG_NEED_RTNL,
9204         },
9205         {
9206                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9207                 .doit = nl80211_stop_sched_scan,
9208                 .policy = nl80211_policy,
9209                 .flags = GENL_ADMIN_PERM,
9210                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9211                                   NL80211_FLAG_NEED_RTNL,
9212         },
9213         {
9214                 .cmd = NL80211_CMD_AUTHENTICATE,
9215                 .doit = nl80211_authenticate,
9216                 .policy = nl80211_policy,
9217                 .flags = GENL_ADMIN_PERM,
9218                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9219                                   NL80211_FLAG_NEED_RTNL,
9220         },
9221         {
9222                 .cmd = NL80211_CMD_ASSOCIATE,
9223                 .doit = nl80211_associate,
9224                 .policy = nl80211_policy,
9225                 .flags = GENL_ADMIN_PERM,
9226                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9227                                   NL80211_FLAG_NEED_RTNL,
9228         },
9229         {
9230                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9231                 .doit = nl80211_deauthenticate,
9232                 .policy = nl80211_policy,
9233                 .flags = GENL_ADMIN_PERM,
9234                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9235                                   NL80211_FLAG_NEED_RTNL,
9236         },
9237         {
9238                 .cmd = NL80211_CMD_DISASSOCIATE,
9239                 .doit = nl80211_disassociate,
9240                 .policy = nl80211_policy,
9241                 .flags = GENL_ADMIN_PERM,
9242                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9243                                   NL80211_FLAG_NEED_RTNL,
9244         },
9245         {
9246                 .cmd = NL80211_CMD_JOIN_IBSS,
9247                 .doit = nl80211_join_ibss,
9248                 .policy = nl80211_policy,
9249                 .flags = GENL_ADMIN_PERM,
9250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9251                                   NL80211_FLAG_NEED_RTNL,
9252         },
9253         {
9254                 .cmd = NL80211_CMD_LEAVE_IBSS,
9255                 .doit = nl80211_leave_ibss,
9256                 .policy = nl80211_policy,
9257                 .flags = GENL_ADMIN_PERM,
9258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9259                                   NL80211_FLAG_NEED_RTNL,
9260         },
9261 #ifdef CONFIG_NL80211_TESTMODE
9262         {
9263                 .cmd = NL80211_CMD_TESTMODE,
9264                 .doit = nl80211_testmode_do,
9265                 .dumpit = nl80211_testmode_dump,
9266                 .policy = nl80211_policy,
9267                 .flags = GENL_ADMIN_PERM,
9268                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9269                                   NL80211_FLAG_NEED_RTNL,
9270         },
9271 #endif
9272         {
9273                 .cmd = NL80211_CMD_CONNECT,
9274                 .doit = nl80211_connect,
9275                 .policy = nl80211_policy,
9276                 .flags = GENL_ADMIN_PERM,
9277                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9278                                   NL80211_FLAG_NEED_RTNL,
9279         },
9280         {
9281                 .cmd = NL80211_CMD_DISCONNECT,
9282                 .doit = nl80211_disconnect,
9283                 .policy = nl80211_policy,
9284                 .flags = GENL_ADMIN_PERM,
9285                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9286                                   NL80211_FLAG_NEED_RTNL,
9287         },
9288         {
9289                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9290                 .doit = nl80211_wiphy_netns,
9291                 .policy = nl80211_policy,
9292                 .flags = GENL_ADMIN_PERM,
9293                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9294                                   NL80211_FLAG_NEED_RTNL,
9295         },
9296         {
9297                 .cmd = NL80211_CMD_GET_SURVEY,
9298                 .policy = nl80211_policy,
9299                 .dumpit = nl80211_dump_survey,
9300         },
9301         {
9302                 .cmd = NL80211_CMD_SET_PMKSA,
9303                 .doit = nl80211_setdel_pmksa,
9304                 .policy = nl80211_policy,
9305                 .flags = GENL_ADMIN_PERM,
9306                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9307                                   NL80211_FLAG_NEED_RTNL,
9308         },
9309         {
9310                 .cmd = NL80211_CMD_DEL_PMKSA,
9311                 .doit = nl80211_setdel_pmksa,
9312                 .policy = nl80211_policy,
9313                 .flags = GENL_ADMIN_PERM,
9314                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9315                                   NL80211_FLAG_NEED_RTNL,
9316         },
9317         {
9318                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9319                 .doit = nl80211_flush_pmksa,
9320                 .policy = nl80211_policy,
9321                 .flags = GENL_ADMIN_PERM,
9322                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9323                                   NL80211_FLAG_NEED_RTNL,
9324         },
9325         {
9326                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9327                 .doit = nl80211_remain_on_channel,
9328                 .policy = nl80211_policy,
9329                 .flags = GENL_ADMIN_PERM,
9330                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9331                                   NL80211_FLAG_NEED_RTNL,
9332         },
9333         {
9334                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9335                 .doit = nl80211_cancel_remain_on_channel,
9336                 .policy = nl80211_policy,
9337                 .flags = GENL_ADMIN_PERM,
9338                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9339                                   NL80211_FLAG_NEED_RTNL,
9340         },
9341         {
9342                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9343                 .doit = nl80211_set_tx_bitrate_mask,
9344                 .policy = nl80211_policy,
9345                 .flags = GENL_ADMIN_PERM,
9346                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9347                                   NL80211_FLAG_NEED_RTNL,
9348         },
9349         {
9350                 .cmd = NL80211_CMD_REGISTER_FRAME,
9351                 .doit = nl80211_register_mgmt,
9352                 .policy = nl80211_policy,
9353                 .flags = GENL_ADMIN_PERM,
9354                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9355                                   NL80211_FLAG_NEED_RTNL,
9356         },
9357         {
9358                 .cmd = NL80211_CMD_FRAME,
9359                 .doit = nl80211_tx_mgmt,
9360                 .policy = nl80211_policy,
9361                 .flags = GENL_ADMIN_PERM,
9362                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9363                                   NL80211_FLAG_NEED_RTNL,
9364         },
9365         {
9366                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9367                 .doit = nl80211_tx_mgmt_cancel_wait,
9368                 .policy = nl80211_policy,
9369                 .flags = GENL_ADMIN_PERM,
9370                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9371                                   NL80211_FLAG_NEED_RTNL,
9372         },
9373         {
9374                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9375                 .doit = nl80211_set_power_save,
9376                 .policy = nl80211_policy,
9377                 .flags = GENL_ADMIN_PERM,
9378                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9379                                   NL80211_FLAG_NEED_RTNL,
9380         },
9381         {
9382                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9383                 .doit = nl80211_get_power_save,
9384                 .policy = nl80211_policy,
9385                 /* can be retrieved by unprivileged users */
9386                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9387                                   NL80211_FLAG_NEED_RTNL,
9388         },
9389         {
9390                 .cmd = NL80211_CMD_SET_CQM,
9391                 .doit = nl80211_set_cqm,
9392                 .policy = nl80211_policy,
9393                 .flags = GENL_ADMIN_PERM,
9394                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9395                                   NL80211_FLAG_NEED_RTNL,
9396         },
9397         {
9398                 .cmd = NL80211_CMD_SET_CHANNEL,
9399                 .doit = nl80211_set_channel,
9400                 .policy = nl80211_policy,
9401                 .flags = GENL_ADMIN_PERM,
9402                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9403                                   NL80211_FLAG_NEED_RTNL,
9404         },
9405         {
9406                 .cmd = NL80211_CMD_SET_WDS_PEER,
9407                 .doit = nl80211_set_wds_peer,
9408                 .policy = nl80211_policy,
9409                 .flags = GENL_ADMIN_PERM,
9410                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9411                                   NL80211_FLAG_NEED_RTNL,
9412         },
9413         {
9414                 .cmd = NL80211_CMD_JOIN_MESH,
9415                 .doit = nl80211_join_mesh,
9416                 .policy = nl80211_policy,
9417                 .flags = GENL_ADMIN_PERM,
9418                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9419                                   NL80211_FLAG_NEED_RTNL,
9420         },
9421         {
9422                 .cmd = NL80211_CMD_LEAVE_MESH,
9423                 .doit = nl80211_leave_mesh,
9424                 .policy = nl80211_policy,
9425                 .flags = GENL_ADMIN_PERM,
9426                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9427                                   NL80211_FLAG_NEED_RTNL,
9428         },
9429 #ifdef CONFIG_PM
9430         {
9431                 .cmd = NL80211_CMD_GET_WOWLAN,
9432                 .doit = nl80211_get_wowlan,
9433                 .policy = nl80211_policy,
9434                 /* can be retrieved by unprivileged users */
9435                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9436                                   NL80211_FLAG_NEED_RTNL,
9437         },
9438         {
9439                 .cmd = NL80211_CMD_SET_WOWLAN,
9440                 .doit = nl80211_set_wowlan,
9441                 .policy = nl80211_policy,
9442                 .flags = GENL_ADMIN_PERM,
9443                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9444                                   NL80211_FLAG_NEED_RTNL,
9445         },
9446 #endif
9447         {
9448                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9449                 .doit = nl80211_set_rekey_data,
9450                 .policy = nl80211_policy,
9451                 .flags = GENL_ADMIN_PERM,
9452                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9453                                   NL80211_FLAG_NEED_RTNL,
9454         },
9455         {
9456                 .cmd = NL80211_CMD_TDLS_MGMT,
9457                 .doit = nl80211_tdls_mgmt,
9458                 .policy = nl80211_policy,
9459                 .flags = GENL_ADMIN_PERM,
9460                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9461                                   NL80211_FLAG_NEED_RTNL,
9462         },
9463         {
9464                 .cmd = NL80211_CMD_TDLS_OPER,
9465                 .doit = nl80211_tdls_oper,
9466                 .policy = nl80211_policy,
9467                 .flags = GENL_ADMIN_PERM,
9468                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9469                                   NL80211_FLAG_NEED_RTNL,
9470         },
9471         {
9472                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9473                 .doit = nl80211_register_unexpected_frame,
9474                 .policy = nl80211_policy,
9475                 .flags = GENL_ADMIN_PERM,
9476                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9477                                   NL80211_FLAG_NEED_RTNL,
9478         },
9479         {
9480                 .cmd = NL80211_CMD_PROBE_CLIENT,
9481                 .doit = nl80211_probe_client,
9482                 .policy = nl80211_policy,
9483                 .flags = GENL_ADMIN_PERM,
9484                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9485                                   NL80211_FLAG_NEED_RTNL,
9486         },
9487         {
9488                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9489                 .doit = nl80211_register_beacons,
9490                 .policy = nl80211_policy,
9491                 .flags = GENL_ADMIN_PERM,
9492                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9493                                   NL80211_FLAG_NEED_RTNL,
9494         },
9495         {
9496                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9497                 .doit = nl80211_set_noack_map,
9498                 .policy = nl80211_policy,
9499                 .flags = GENL_ADMIN_PERM,
9500                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9501                                   NL80211_FLAG_NEED_RTNL,
9502         },
9503         {
9504                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9505                 .doit = nl80211_start_p2p_device,
9506                 .policy = nl80211_policy,
9507                 .flags = GENL_ADMIN_PERM,
9508                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9509                                   NL80211_FLAG_NEED_RTNL,
9510         },
9511         {
9512                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9513                 .doit = nl80211_stop_p2p_device,
9514                 .policy = nl80211_policy,
9515                 .flags = GENL_ADMIN_PERM,
9516                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9517                                   NL80211_FLAG_NEED_RTNL,
9518         },
9519         {
9520                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9521                 .doit = nl80211_set_mcast_rate,
9522                 .policy = nl80211_policy,
9523                 .flags = GENL_ADMIN_PERM,
9524                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9525                                   NL80211_FLAG_NEED_RTNL,
9526         },
9527         {
9528                 .cmd = NL80211_CMD_SET_MAC_ACL,
9529                 .doit = nl80211_set_mac_acl,
9530                 .policy = nl80211_policy,
9531                 .flags = GENL_ADMIN_PERM,
9532                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9533                                   NL80211_FLAG_NEED_RTNL,
9534         },
9535         {
9536                 .cmd = NL80211_CMD_RADAR_DETECT,
9537                 .doit = nl80211_start_radar_detection,
9538                 .policy = nl80211_policy,
9539                 .flags = GENL_ADMIN_PERM,
9540                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9541                                   NL80211_FLAG_NEED_RTNL,
9542         },
9543         {
9544                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9545                 .doit = nl80211_get_protocol_features,
9546                 .policy = nl80211_policy,
9547         },
9548         {
9549                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9550                 .doit = nl80211_update_ft_ies,
9551                 .policy = nl80211_policy,
9552                 .flags = GENL_ADMIN_PERM,
9553                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9554                                   NL80211_FLAG_NEED_RTNL,
9555         },
9556         {
9557                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9558                 .doit = nl80211_crit_protocol_start,
9559                 .policy = nl80211_policy,
9560                 .flags = GENL_ADMIN_PERM,
9561                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9562                                   NL80211_FLAG_NEED_RTNL,
9563         },
9564         {
9565                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9566                 .doit = nl80211_crit_protocol_stop,
9567                 .policy = nl80211_policy,
9568                 .flags = GENL_ADMIN_PERM,
9569                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9570                                   NL80211_FLAG_NEED_RTNL,
9571         },
9572         {
9573                 .cmd = NL80211_CMD_GET_COALESCE,
9574                 .doit = nl80211_get_coalesce,
9575                 .policy = nl80211_policy,
9576                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9577                                   NL80211_FLAG_NEED_RTNL,
9578         },
9579         {
9580                 .cmd = NL80211_CMD_SET_COALESCE,
9581                 .doit = nl80211_set_coalesce,
9582                 .policy = nl80211_policy,
9583                 .flags = GENL_ADMIN_PERM,
9584                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9585                                   NL80211_FLAG_NEED_RTNL,
9586         },
9587         {
9588                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9589                 .doit = nl80211_channel_switch,
9590                 .policy = nl80211_policy,
9591                 .flags = GENL_ADMIN_PERM,
9592                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9593                                   NL80211_FLAG_NEED_RTNL,
9594         },
9595 };
9596
9597 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9598         .name = "mlme",
9599 };
9600
9601 /* multicast groups */
9602 static struct genl_multicast_group nl80211_config_mcgrp = {
9603         .name = "config",
9604 };
9605 static struct genl_multicast_group nl80211_scan_mcgrp = {
9606         .name = "scan",
9607 };
9608 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9609         .name = "regulatory",
9610 };
9611
9612 /* notification functions */
9613
9614 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9615 {
9616         struct sk_buff *msg;
9617         struct nl80211_dump_wiphy_state state = {};
9618
9619         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9620         if (!msg)
9621                 return;
9622
9623         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9624                 nlmsg_free(msg);
9625                 return;
9626         }
9627
9628         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9629                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9630 }
9631
9632 static int nl80211_add_scan_req(struct sk_buff *msg,
9633                                 struct cfg80211_registered_device *rdev)
9634 {
9635         struct cfg80211_scan_request *req = rdev->scan_req;
9636         struct nlattr *nest;
9637         int i;
9638
9639         if (WARN_ON(!req))
9640                 return 0;
9641
9642         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9643         if (!nest)
9644                 goto nla_put_failure;
9645         for (i = 0; i < req->n_ssids; i++) {
9646                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9647                         goto nla_put_failure;
9648         }
9649         nla_nest_end(msg, nest);
9650
9651         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9652         if (!nest)
9653                 goto nla_put_failure;
9654         for (i = 0; i < req->n_channels; i++) {
9655                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9656                         goto nla_put_failure;
9657         }
9658         nla_nest_end(msg, nest);
9659
9660         if (req->ie &&
9661             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9662                 goto nla_put_failure;
9663
9664         if (req->flags)
9665                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9666
9667         return 0;
9668  nla_put_failure:
9669         return -ENOBUFS;
9670 }
9671
9672 static int nl80211_send_scan_msg(struct sk_buff *msg,
9673                                  struct cfg80211_registered_device *rdev,
9674                                  struct wireless_dev *wdev,
9675                                  u32 portid, u32 seq, int flags,
9676                                  u32 cmd)
9677 {
9678         void *hdr;
9679
9680         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9681         if (!hdr)
9682                 return -1;
9683
9684         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9685             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9686                                          wdev->netdev->ifindex)) ||
9687             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9688                 goto nla_put_failure;
9689
9690         /* ignore errors and send incomplete event anyway */
9691         nl80211_add_scan_req(msg, rdev);
9692
9693         return genlmsg_end(msg, hdr);
9694
9695  nla_put_failure:
9696         genlmsg_cancel(msg, hdr);
9697         return -EMSGSIZE;
9698 }
9699
9700 static int
9701 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9702                             struct cfg80211_registered_device *rdev,
9703                             struct net_device *netdev,
9704                             u32 portid, u32 seq, int flags, u32 cmd)
9705 {
9706         void *hdr;
9707
9708         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9709         if (!hdr)
9710                 return -1;
9711
9712         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9713             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9714                 goto nla_put_failure;
9715
9716         return genlmsg_end(msg, hdr);
9717
9718  nla_put_failure:
9719         genlmsg_cancel(msg, hdr);
9720         return -EMSGSIZE;
9721 }
9722
9723 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9724                              struct wireless_dev *wdev)
9725 {
9726         struct sk_buff *msg;
9727
9728         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9729         if (!msg)
9730                 return;
9731
9732         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9733                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9734                 nlmsg_free(msg);
9735                 return;
9736         }
9737
9738         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9739                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9740 }
9741
9742 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9743                             struct wireless_dev *wdev)
9744 {
9745         struct sk_buff *msg;
9746
9747         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9748         if (!msg)
9749                 return;
9750
9751         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9752                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9753                 nlmsg_free(msg);
9754                 return;
9755         }
9756
9757         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9758                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9759 }
9760
9761 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9762                                struct wireless_dev *wdev)
9763 {
9764         struct sk_buff *msg;
9765
9766         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9767         if (!msg)
9768                 return;
9769
9770         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9771                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9772                 nlmsg_free(msg);
9773                 return;
9774         }
9775
9776         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9777                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9778 }
9779
9780 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9781                                      struct net_device *netdev)
9782 {
9783         struct sk_buff *msg;
9784
9785         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9786         if (!msg)
9787                 return;
9788
9789         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9790                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9791                 nlmsg_free(msg);
9792                 return;
9793         }
9794
9795         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9796                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9797 }
9798
9799 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9800                              struct net_device *netdev, u32 cmd)
9801 {
9802         struct sk_buff *msg;
9803
9804         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9805         if (!msg)
9806                 return;
9807
9808         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9809                 nlmsg_free(msg);
9810                 return;
9811         }
9812
9813         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9814                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9815 }
9816
9817 /*
9818  * This can happen on global regulatory changes or device specific settings
9819  * based on custom world regulatory domains.
9820  */
9821 void nl80211_send_reg_change_event(struct regulatory_request *request)
9822 {
9823         struct sk_buff *msg;
9824         void *hdr;
9825
9826         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9827         if (!msg)
9828                 return;
9829
9830         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9831         if (!hdr) {
9832                 nlmsg_free(msg);
9833                 return;
9834         }
9835
9836         /* Userspace can always count this one always being set */
9837         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9838                 goto nla_put_failure;
9839
9840         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9841                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9842                                NL80211_REGDOM_TYPE_WORLD))
9843                         goto nla_put_failure;
9844         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9845                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9846                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9847                         goto nla_put_failure;
9848         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9849                    request->intersect) {
9850                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9851                                NL80211_REGDOM_TYPE_INTERSECTION))
9852                         goto nla_put_failure;
9853         } else {
9854                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9855                                NL80211_REGDOM_TYPE_COUNTRY) ||
9856                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9857                                    request->alpha2))
9858                         goto nla_put_failure;
9859         }
9860
9861         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9862             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9863                 goto nla_put_failure;
9864
9865         genlmsg_end(msg, hdr);
9866
9867         rcu_read_lock();
9868         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9869                                 GFP_ATOMIC);
9870         rcu_read_unlock();
9871
9872         return;
9873
9874 nla_put_failure:
9875         genlmsg_cancel(msg, hdr);
9876         nlmsg_free(msg);
9877 }
9878
9879 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9880                                     struct net_device *netdev,
9881                                     const u8 *buf, size_t len,
9882                                     enum nl80211_commands cmd, gfp_t gfp)
9883 {
9884         struct sk_buff *msg;
9885         void *hdr;
9886
9887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9888         if (!msg)
9889                 return;
9890
9891         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9892         if (!hdr) {
9893                 nlmsg_free(msg);
9894                 return;
9895         }
9896
9897         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9898             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9899             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9900                 goto nla_put_failure;
9901
9902         genlmsg_end(msg, hdr);
9903
9904         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9905                                 nl80211_mlme_mcgrp.id, gfp);
9906         return;
9907
9908  nla_put_failure:
9909         genlmsg_cancel(msg, hdr);
9910         nlmsg_free(msg);
9911 }
9912
9913 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9914                           struct net_device *netdev, const u8 *buf,
9915                           size_t len, gfp_t gfp)
9916 {
9917         nl80211_send_mlme_event(rdev, netdev, buf, len,
9918                                 NL80211_CMD_AUTHENTICATE, gfp);
9919 }
9920
9921 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9922                            struct net_device *netdev, const u8 *buf,
9923                            size_t len, gfp_t gfp)
9924 {
9925         nl80211_send_mlme_event(rdev, netdev, buf, len,
9926                                 NL80211_CMD_ASSOCIATE, gfp);
9927 }
9928
9929 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9930                          struct net_device *netdev, const u8 *buf,
9931                          size_t len, gfp_t gfp)
9932 {
9933         nl80211_send_mlme_event(rdev, netdev, buf, len,
9934                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9935 }
9936
9937 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9938                            struct net_device *netdev, const u8 *buf,
9939                            size_t len, gfp_t gfp)
9940 {
9941         nl80211_send_mlme_event(rdev, netdev, buf, len,
9942                                 NL80211_CMD_DISASSOCIATE, gfp);
9943 }
9944
9945 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9946                                   size_t len)
9947 {
9948         struct wireless_dev *wdev = dev->ieee80211_ptr;
9949         struct wiphy *wiphy = wdev->wiphy;
9950         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9951         const struct ieee80211_mgmt *mgmt = (void *)buf;
9952         u32 cmd;
9953
9954         if (WARN_ON(len < 2))
9955                 return;
9956
9957         if (ieee80211_is_deauth(mgmt->frame_control))
9958                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9959         else
9960                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9961
9962         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9963         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9964 }
9965 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9966
9967 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9968                                       struct net_device *netdev, int cmd,
9969                                       const u8 *addr, gfp_t gfp)
9970 {
9971         struct sk_buff *msg;
9972         void *hdr;
9973
9974         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9975         if (!msg)
9976                 return;
9977
9978         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9979         if (!hdr) {
9980                 nlmsg_free(msg);
9981                 return;
9982         }
9983
9984         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9985             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9986             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9987             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9988                 goto nla_put_failure;
9989
9990         genlmsg_end(msg, hdr);
9991
9992         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9993                                 nl80211_mlme_mcgrp.id, gfp);
9994         return;
9995
9996  nla_put_failure:
9997         genlmsg_cancel(msg, hdr);
9998         nlmsg_free(msg);
9999 }
10000
10001 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10002                                struct net_device *netdev, const u8 *addr,
10003                                gfp_t gfp)
10004 {
10005         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10006                                   addr, gfp);
10007 }
10008
10009 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10010                                 struct net_device *netdev, const u8 *addr,
10011                                 gfp_t gfp)
10012 {
10013         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10014                                   addr, gfp);
10015 }
10016
10017 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10018                                  struct net_device *netdev, const u8 *bssid,
10019                                  const u8 *req_ie, size_t req_ie_len,
10020                                  const u8 *resp_ie, size_t resp_ie_len,
10021                                  u16 status, gfp_t gfp)
10022 {
10023         struct sk_buff *msg;
10024         void *hdr;
10025
10026         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10027         if (!msg)
10028                 return;
10029
10030         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10031         if (!hdr) {
10032                 nlmsg_free(msg);
10033                 return;
10034         }
10035
10036         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10037             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10038             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10039             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10040             (req_ie &&
10041              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10042             (resp_ie &&
10043              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10044                 goto nla_put_failure;
10045
10046         genlmsg_end(msg, hdr);
10047
10048         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10049                                 nl80211_mlme_mcgrp.id, gfp);
10050         return;
10051
10052  nla_put_failure:
10053         genlmsg_cancel(msg, hdr);
10054         nlmsg_free(msg);
10055
10056 }
10057
10058 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10059                          struct net_device *netdev, const u8 *bssid,
10060                          const u8 *req_ie, size_t req_ie_len,
10061                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10062 {
10063         struct sk_buff *msg;
10064         void *hdr;
10065
10066         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10067         if (!msg)
10068                 return;
10069
10070         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10071         if (!hdr) {
10072                 nlmsg_free(msg);
10073                 return;
10074         }
10075
10076         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10077             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10078             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10079             (req_ie &&
10080              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10081             (resp_ie &&
10082              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10083                 goto nla_put_failure;
10084
10085         genlmsg_end(msg, hdr);
10086
10087         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10088                                 nl80211_mlme_mcgrp.id, gfp);
10089         return;
10090
10091  nla_put_failure:
10092         genlmsg_cancel(msg, hdr);
10093         nlmsg_free(msg);
10094
10095 }
10096
10097 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10098                                struct net_device *netdev, u16 reason,
10099                                const u8 *ie, size_t ie_len, bool from_ap)
10100 {
10101         struct sk_buff *msg;
10102         void *hdr;
10103
10104         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10105         if (!msg)
10106                 return;
10107
10108         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10109         if (!hdr) {
10110                 nlmsg_free(msg);
10111                 return;
10112         }
10113
10114         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10115             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10116             (from_ap && reason &&
10117              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10118             (from_ap &&
10119              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10120             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10121                 goto nla_put_failure;
10122
10123         genlmsg_end(msg, hdr);
10124
10125         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10126                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10127         return;
10128
10129  nla_put_failure:
10130         genlmsg_cancel(msg, hdr);
10131         nlmsg_free(msg);
10132
10133 }
10134
10135 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10136                              struct net_device *netdev, const u8 *bssid,
10137                              gfp_t gfp)
10138 {
10139         struct sk_buff *msg;
10140         void *hdr;
10141
10142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10143         if (!msg)
10144                 return;
10145
10146         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10147         if (!hdr) {
10148                 nlmsg_free(msg);
10149                 return;
10150         }
10151
10152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10153             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10154             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10155                 goto nla_put_failure;
10156
10157         genlmsg_end(msg, hdr);
10158
10159         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10160                                 nl80211_mlme_mcgrp.id, gfp);
10161         return;
10162
10163  nla_put_failure:
10164         genlmsg_cancel(msg, hdr);
10165         nlmsg_free(msg);
10166 }
10167
10168 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10169                                         const u8* ie, u8 ie_len, gfp_t gfp)
10170 {
10171         struct wireless_dev *wdev = dev->ieee80211_ptr;
10172         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10173         struct sk_buff *msg;
10174         void *hdr;
10175
10176         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10177                 return;
10178
10179         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10180
10181         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10182         if (!msg)
10183                 return;
10184
10185         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10186         if (!hdr) {
10187                 nlmsg_free(msg);
10188                 return;
10189         }
10190
10191         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10192             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10193             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10194             (ie_len && ie &&
10195              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10196                 goto nla_put_failure;
10197
10198         genlmsg_end(msg, hdr);
10199
10200         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10201                                 nl80211_mlme_mcgrp.id, gfp);
10202         return;
10203
10204  nla_put_failure:
10205         genlmsg_cancel(msg, hdr);
10206         nlmsg_free(msg);
10207 }
10208 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10209
10210 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10211                                  struct net_device *netdev, const u8 *addr,
10212                                  enum nl80211_key_type key_type, int key_id,
10213                                  const u8 *tsc, gfp_t gfp)
10214 {
10215         struct sk_buff *msg;
10216         void *hdr;
10217
10218         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10219         if (!msg)
10220                 return;
10221
10222         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10223         if (!hdr) {
10224                 nlmsg_free(msg);
10225                 return;
10226         }
10227
10228         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10229             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10230             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10231             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10232             (key_id != -1 &&
10233              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10234             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10235                 goto nla_put_failure;
10236
10237         genlmsg_end(msg, hdr);
10238
10239         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10240                                 nl80211_mlme_mcgrp.id, gfp);
10241         return;
10242
10243  nla_put_failure:
10244         genlmsg_cancel(msg, hdr);
10245         nlmsg_free(msg);
10246 }
10247
10248 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10249                                     struct ieee80211_channel *channel_before,
10250                                     struct ieee80211_channel *channel_after)
10251 {
10252         struct sk_buff *msg;
10253         void *hdr;
10254         struct nlattr *nl_freq;
10255
10256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10257         if (!msg)
10258                 return;
10259
10260         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10261         if (!hdr) {
10262                 nlmsg_free(msg);
10263                 return;
10264         }
10265
10266         /*
10267          * Since we are applying the beacon hint to a wiphy we know its
10268          * wiphy_idx is valid
10269          */
10270         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10271                 goto nla_put_failure;
10272
10273         /* Before */
10274         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10275         if (!nl_freq)
10276                 goto nla_put_failure;
10277         if (nl80211_msg_put_channel(msg, channel_before, false))
10278                 goto nla_put_failure;
10279         nla_nest_end(msg, nl_freq);
10280
10281         /* After */
10282         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10283         if (!nl_freq)
10284                 goto nla_put_failure;
10285         if (nl80211_msg_put_channel(msg, channel_after, false))
10286                 goto nla_put_failure;
10287         nla_nest_end(msg, nl_freq);
10288
10289         genlmsg_end(msg, hdr);
10290
10291         rcu_read_lock();
10292         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
10293                                 GFP_ATOMIC);
10294         rcu_read_unlock();
10295
10296         return;
10297
10298 nla_put_failure:
10299         genlmsg_cancel(msg, hdr);
10300         nlmsg_free(msg);
10301 }
10302
10303 static void nl80211_send_remain_on_chan_event(
10304         int cmd, struct cfg80211_registered_device *rdev,
10305         struct wireless_dev *wdev, u64 cookie,
10306         struct ieee80211_channel *chan,
10307         unsigned int duration, gfp_t gfp)
10308 {
10309         struct sk_buff *msg;
10310         void *hdr;
10311
10312         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10313         if (!msg)
10314                 return;
10315
10316         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10317         if (!hdr) {
10318                 nlmsg_free(msg);
10319                 return;
10320         }
10321
10322         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10323             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10324                                          wdev->netdev->ifindex)) ||
10325             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10326             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10327             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10328                         NL80211_CHAN_NO_HT) ||
10329             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10330                 goto nla_put_failure;
10331
10332         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10333             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10334                 goto nla_put_failure;
10335
10336         genlmsg_end(msg, hdr);
10337
10338         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10339                                 nl80211_mlme_mcgrp.id, gfp);
10340         return;
10341
10342  nla_put_failure:
10343         genlmsg_cancel(msg, hdr);
10344         nlmsg_free(msg);
10345 }
10346
10347 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10348                                struct ieee80211_channel *chan,
10349                                unsigned int duration, gfp_t gfp)
10350 {
10351         struct wiphy *wiphy = wdev->wiphy;
10352         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10353
10354         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10355         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10356                                           rdev, wdev, cookie, chan,
10357                                           duration, gfp);
10358 }
10359 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10360
10361 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10362                                         struct ieee80211_channel *chan,
10363                                         gfp_t gfp)
10364 {
10365         struct wiphy *wiphy = wdev->wiphy;
10366         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10367
10368         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10369         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10370                                           rdev, wdev, cookie, chan, 0, gfp);
10371 }
10372 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10373
10374 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10375                       struct station_info *sinfo, gfp_t gfp)
10376 {
10377         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10378         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10379         struct sk_buff *msg;
10380
10381         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10382
10383         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10384         if (!msg)
10385                 return;
10386
10387         if (nl80211_send_station(msg, 0, 0, 0,
10388                                  rdev, dev, mac_addr, sinfo) < 0) {
10389                 nlmsg_free(msg);
10390                 return;
10391         }
10392
10393         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10394                                 nl80211_mlme_mcgrp.id, gfp);
10395 }
10396 EXPORT_SYMBOL(cfg80211_new_sta);
10397
10398 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10399 {
10400         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10401         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10402         struct sk_buff *msg;
10403         void *hdr;
10404
10405         trace_cfg80211_del_sta(dev, mac_addr);
10406
10407         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10408         if (!msg)
10409                 return;
10410
10411         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10412         if (!hdr) {
10413                 nlmsg_free(msg);
10414                 return;
10415         }
10416
10417         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10418             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10419                 goto nla_put_failure;
10420
10421         genlmsg_end(msg, hdr);
10422
10423         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10424                                 nl80211_mlme_mcgrp.id, gfp);
10425         return;
10426
10427  nla_put_failure:
10428         genlmsg_cancel(msg, hdr);
10429         nlmsg_free(msg);
10430 }
10431 EXPORT_SYMBOL(cfg80211_del_sta);
10432
10433 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10434                           enum nl80211_connect_failed_reason reason,
10435                           gfp_t gfp)
10436 {
10437         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10438         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10439         struct sk_buff *msg;
10440         void *hdr;
10441
10442         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10443         if (!msg)
10444                 return;
10445
10446         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10447         if (!hdr) {
10448                 nlmsg_free(msg);
10449                 return;
10450         }
10451
10452         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10453             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10454             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10455                 goto nla_put_failure;
10456
10457         genlmsg_end(msg, hdr);
10458
10459         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10460                                 nl80211_mlme_mcgrp.id, gfp);
10461         return;
10462
10463  nla_put_failure:
10464         genlmsg_cancel(msg, hdr);
10465         nlmsg_free(msg);
10466 }
10467 EXPORT_SYMBOL(cfg80211_conn_failed);
10468
10469 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10470                                        const u8 *addr, gfp_t gfp)
10471 {
10472         struct wireless_dev *wdev = dev->ieee80211_ptr;
10473         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10474         struct sk_buff *msg;
10475         void *hdr;
10476         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10477
10478         if (!nlportid)
10479                 return false;
10480
10481         msg = nlmsg_new(100, gfp);
10482         if (!msg)
10483                 return true;
10484
10485         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10486         if (!hdr) {
10487                 nlmsg_free(msg);
10488                 return true;
10489         }
10490
10491         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10492             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10493             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10494                 goto nla_put_failure;
10495
10496         genlmsg_end(msg, hdr);
10497         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10498         return true;
10499
10500  nla_put_failure:
10501         genlmsg_cancel(msg, hdr);
10502         nlmsg_free(msg);
10503         return true;
10504 }
10505
10506 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10507                                 const u8 *addr, gfp_t gfp)
10508 {
10509         struct wireless_dev *wdev = dev->ieee80211_ptr;
10510         bool ret;
10511
10512         trace_cfg80211_rx_spurious_frame(dev, addr);
10513
10514         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10515                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10516                 trace_cfg80211_return_bool(false);
10517                 return false;
10518         }
10519         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10520                                          addr, gfp);
10521         trace_cfg80211_return_bool(ret);
10522         return ret;
10523 }
10524 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10525
10526 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10527                                         const u8 *addr, gfp_t gfp)
10528 {
10529         struct wireless_dev *wdev = dev->ieee80211_ptr;
10530         bool ret;
10531
10532         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10533
10534         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10535                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10536                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10537                 trace_cfg80211_return_bool(false);
10538                 return false;
10539         }
10540         ret = __nl80211_unexpected_frame(dev,
10541                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10542                                          addr, gfp);
10543         trace_cfg80211_return_bool(ret);
10544         return ret;
10545 }
10546 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10547
10548 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10549                       struct wireless_dev *wdev, u32 nlportid,
10550                       int freq, int sig_dbm,
10551                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10552 {
10553         struct net_device *netdev = wdev->netdev;
10554         struct sk_buff *msg;
10555         void *hdr;
10556
10557         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10558         if (!msg)
10559                 return -ENOMEM;
10560
10561         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10562         if (!hdr) {
10563                 nlmsg_free(msg);
10564                 return -ENOMEM;
10565         }
10566
10567         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10568             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10569                                         netdev->ifindex)) ||
10570             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10571             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10572             (sig_dbm &&
10573              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10574             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10575             (flags &&
10576              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10577                 goto nla_put_failure;
10578
10579         genlmsg_end(msg, hdr);
10580
10581         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10582
10583  nla_put_failure:
10584         genlmsg_cancel(msg, hdr);
10585         nlmsg_free(msg);
10586         return -ENOBUFS;
10587 }
10588
10589 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10590                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10591 {
10592         struct wiphy *wiphy = wdev->wiphy;
10593         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10594         struct net_device *netdev = wdev->netdev;
10595         struct sk_buff *msg;
10596         void *hdr;
10597
10598         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10599
10600         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10601         if (!msg)
10602                 return;
10603
10604         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10605         if (!hdr) {
10606                 nlmsg_free(msg);
10607                 return;
10608         }
10609
10610         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10611             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10612                                    netdev->ifindex)) ||
10613             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10614             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10615             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10616             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10617                 goto nla_put_failure;
10618
10619         genlmsg_end(msg, hdr);
10620
10621         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10622                                 nl80211_mlme_mcgrp.id, gfp);
10623         return;
10624
10625  nla_put_failure:
10626         genlmsg_cancel(msg, hdr);
10627         nlmsg_free(msg);
10628 }
10629 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10630
10631 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10632                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10633                               gfp_t gfp)
10634 {
10635         struct wireless_dev *wdev = dev->ieee80211_ptr;
10636         struct wiphy *wiphy = wdev->wiphy;
10637         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10638         struct sk_buff *msg;
10639         struct nlattr *pinfoattr;
10640         void *hdr;
10641
10642         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10643
10644         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10645         if (!msg)
10646                 return;
10647
10648         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10649         if (!hdr) {
10650                 nlmsg_free(msg);
10651                 return;
10652         }
10653
10654         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10655             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10656                 goto nla_put_failure;
10657
10658         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10659         if (!pinfoattr)
10660                 goto nla_put_failure;
10661
10662         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10663                         rssi_event))
10664                 goto nla_put_failure;
10665
10666         nla_nest_end(msg, pinfoattr);
10667
10668         genlmsg_end(msg, hdr);
10669
10670         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10671                                 nl80211_mlme_mcgrp.id, gfp);
10672         return;
10673
10674  nla_put_failure:
10675         genlmsg_cancel(msg, hdr);
10676         nlmsg_free(msg);
10677 }
10678 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10679
10680 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10681                                      struct net_device *netdev, const u8 *bssid,
10682                                      const u8 *replay_ctr, gfp_t gfp)
10683 {
10684         struct sk_buff *msg;
10685         struct nlattr *rekey_attr;
10686         void *hdr;
10687
10688         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10689         if (!msg)
10690                 return;
10691
10692         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10693         if (!hdr) {
10694                 nlmsg_free(msg);
10695                 return;
10696         }
10697
10698         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10699             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10700             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10701                 goto nla_put_failure;
10702
10703         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10704         if (!rekey_attr)
10705                 goto nla_put_failure;
10706
10707         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10708                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10709                 goto nla_put_failure;
10710
10711         nla_nest_end(msg, rekey_attr);
10712
10713         genlmsg_end(msg, hdr);
10714
10715         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10716                                 nl80211_mlme_mcgrp.id, gfp);
10717         return;
10718
10719  nla_put_failure:
10720         genlmsg_cancel(msg, hdr);
10721         nlmsg_free(msg);
10722 }
10723
10724 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10725                                const u8 *replay_ctr, gfp_t gfp)
10726 {
10727         struct wireless_dev *wdev = dev->ieee80211_ptr;
10728         struct wiphy *wiphy = wdev->wiphy;
10729         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10730
10731         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10732         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10733 }
10734 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10735
10736 static void
10737 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10738                                struct net_device *netdev, int index,
10739                                const u8 *bssid, bool preauth, gfp_t gfp)
10740 {
10741         struct sk_buff *msg;
10742         struct nlattr *attr;
10743         void *hdr;
10744
10745         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10746         if (!msg)
10747                 return;
10748
10749         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10750         if (!hdr) {
10751                 nlmsg_free(msg);
10752                 return;
10753         }
10754
10755         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10756             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10757                 goto nla_put_failure;
10758
10759         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10760         if (!attr)
10761                 goto nla_put_failure;
10762
10763         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10764             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10765             (preauth &&
10766              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10767                 goto nla_put_failure;
10768
10769         nla_nest_end(msg, attr);
10770
10771         genlmsg_end(msg, hdr);
10772
10773         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10774                                 nl80211_mlme_mcgrp.id, gfp);
10775         return;
10776
10777  nla_put_failure:
10778         genlmsg_cancel(msg, hdr);
10779         nlmsg_free(msg);
10780 }
10781
10782 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10783                                      const u8 *bssid, bool preauth, gfp_t gfp)
10784 {
10785         struct wireless_dev *wdev = dev->ieee80211_ptr;
10786         struct wiphy *wiphy = wdev->wiphy;
10787         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10788
10789         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10790         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10791 }
10792 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10793
10794 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10795                                      struct net_device *netdev,
10796                                      struct cfg80211_chan_def *chandef,
10797                                      gfp_t gfp)
10798 {
10799         struct sk_buff *msg;
10800         void *hdr;
10801
10802         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10803         if (!msg)
10804                 return;
10805
10806         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10807         if (!hdr) {
10808                 nlmsg_free(msg);
10809                 return;
10810         }
10811
10812         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10813                 goto nla_put_failure;
10814
10815         if (nl80211_send_chandef(msg, chandef))
10816                 goto nla_put_failure;
10817
10818         genlmsg_end(msg, hdr);
10819
10820         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10821                                 nl80211_mlme_mcgrp.id, gfp);
10822         return;
10823
10824  nla_put_failure:
10825         genlmsg_cancel(msg, hdr);
10826         nlmsg_free(msg);
10827 }
10828
10829 void cfg80211_ch_switch_notify(struct net_device *dev,
10830                                struct cfg80211_chan_def *chandef)
10831 {
10832         struct wireless_dev *wdev = dev->ieee80211_ptr;
10833         struct wiphy *wiphy = wdev->wiphy;
10834         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10835
10836         ASSERT_WDEV_LOCK(wdev);
10837
10838         trace_cfg80211_ch_switch_notify(dev, chandef);
10839
10840         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10841                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10842                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
10843                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10844                 return;
10845
10846         wdev->channel = chandef->chan;
10847         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10848 }
10849 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10850
10851 void cfg80211_cqm_txe_notify(struct net_device *dev,
10852                              const u8 *peer, u32 num_packets,
10853                              u32 rate, u32 intvl, gfp_t gfp)
10854 {
10855         struct wireless_dev *wdev = dev->ieee80211_ptr;
10856         struct wiphy *wiphy = wdev->wiphy;
10857         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10858         struct sk_buff *msg;
10859         struct nlattr *pinfoattr;
10860         void *hdr;
10861
10862         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10863         if (!msg)
10864                 return;
10865
10866         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10867         if (!hdr) {
10868                 nlmsg_free(msg);
10869                 return;
10870         }
10871
10872         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10873             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10874             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10875                 goto nla_put_failure;
10876
10877         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10878         if (!pinfoattr)
10879                 goto nla_put_failure;
10880
10881         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10882                 goto nla_put_failure;
10883
10884         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10885                 goto nla_put_failure;
10886
10887         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10888                 goto nla_put_failure;
10889
10890         nla_nest_end(msg, pinfoattr);
10891
10892         genlmsg_end(msg, hdr);
10893
10894         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10895                                 nl80211_mlme_mcgrp.id, gfp);
10896         return;
10897
10898  nla_put_failure:
10899         genlmsg_cancel(msg, hdr);
10900         nlmsg_free(msg);
10901 }
10902 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10903
10904 void
10905 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10906                      const struct cfg80211_chan_def *chandef,
10907                      enum nl80211_radar_event event,
10908                      struct net_device *netdev, gfp_t gfp)
10909 {
10910         struct sk_buff *msg;
10911         void *hdr;
10912
10913         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10914         if (!msg)
10915                 return;
10916
10917         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10918         if (!hdr) {
10919                 nlmsg_free(msg);
10920                 return;
10921         }
10922
10923         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10924                 goto nla_put_failure;
10925
10926         /* NOP and radar events don't need a netdev parameter */
10927         if (netdev) {
10928                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10929
10930                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10931                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10932                         goto nla_put_failure;
10933         }
10934
10935         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10936                 goto nla_put_failure;
10937
10938         if (nl80211_send_chandef(msg, chandef))
10939                 goto nla_put_failure;
10940
10941         genlmsg_end(msg, hdr);
10942
10943         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10944                                 nl80211_mlme_mcgrp.id, gfp);
10945         return;
10946
10947  nla_put_failure:
10948         genlmsg_cancel(msg, hdr);
10949         nlmsg_free(msg);
10950 }
10951
10952 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10953                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10954 {
10955         struct wireless_dev *wdev = dev->ieee80211_ptr;
10956         struct wiphy *wiphy = wdev->wiphy;
10957         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10958         struct sk_buff *msg;
10959         struct nlattr *pinfoattr;
10960         void *hdr;
10961
10962         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10963
10964         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10965         if (!msg)
10966                 return;
10967
10968         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10969         if (!hdr) {
10970                 nlmsg_free(msg);
10971                 return;
10972         }
10973
10974         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10975             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10976             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10977                 goto nla_put_failure;
10978
10979         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10980         if (!pinfoattr)
10981                 goto nla_put_failure;
10982
10983         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10984                 goto nla_put_failure;
10985
10986         nla_nest_end(msg, pinfoattr);
10987
10988         genlmsg_end(msg, hdr);
10989
10990         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10991                                 nl80211_mlme_mcgrp.id, gfp);
10992         return;
10993
10994  nla_put_failure:
10995         genlmsg_cancel(msg, hdr);
10996         nlmsg_free(msg);
10997 }
10998 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10999
11000 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11001                            u64 cookie, bool acked, gfp_t gfp)
11002 {
11003         struct wireless_dev *wdev = dev->ieee80211_ptr;
11004         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11005         struct sk_buff *msg;
11006         void *hdr;
11007
11008         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11009
11010         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11011
11012         if (!msg)
11013                 return;
11014
11015         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11016         if (!hdr) {
11017                 nlmsg_free(msg);
11018                 return;
11019         }
11020
11021         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11022             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11023             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11024             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11025             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11026                 goto nla_put_failure;
11027
11028         genlmsg_end(msg, hdr);
11029
11030         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11031                                 nl80211_mlme_mcgrp.id, gfp);
11032         return;
11033
11034  nla_put_failure:
11035         genlmsg_cancel(msg, hdr);
11036         nlmsg_free(msg);
11037 }
11038 EXPORT_SYMBOL(cfg80211_probe_status);
11039
11040 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11041                                  const u8 *frame, size_t len,
11042                                  int freq, int sig_dbm)
11043 {
11044         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11045         struct sk_buff *msg;
11046         void *hdr;
11047         struct cfg80211_beacon_registration *reg;
11048
11049         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11050
11051         spin_lock_bh(&rdev->beacon_registrations_lock);
11052         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11053                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11054                 if (!msg) {
11055                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11056                         return;
11057                 }
11058
11059                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11060                 if (!hdr)
11061                         goto nla_put_failure;
11062
11063                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11064                     (freq &&
11065                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11066                     (sig_dbm &&
11067                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11068                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11069                         goto nla_put_failure;
11070
11071                 genlmsg_end(msg, hdr);
11072
11073                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11074         }
11075         spin_unlock_bh(&rdev->beacon_registrations_lock);
11076         return;
11077
11078  nla_put_failure:
11079         spin_unlock_bh(&rdev->beacon_registrations_lock);
11080         if (hdr)
11081                 genlmsg_cancel(msg, hdr);
11082         nlmsg_free(msg);
11083 }
11084 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11085
11086 #ifdef CONFIG_PM
11087 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11088                                    struct cfg80211_wowlan_wakeup *wakeup,
11089                                    gfp_t gfp)
11090 {
11091         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11092         struct sk_buff *msg;
11093         void *hdr;
11094         int size = 200;
11095
11096         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11097
11098         if (wakeup)
11099                 size += wakeup->packet_present_len;
11100
11101         msg = nlmsg_new(size, gfp);
11102         if (!msg)
11103                 return;
11104
11105         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11106         if (!hdr)
11107                 goto free_msg;
11108
11109         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11110             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11111                 goto free_msg;
11112
11113         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11114                                         wdev->netdev->ifindex))
11115                 goto free_msg;
11116
11117         if (wakeup) {
11118                 struct nlattr *reasons;
11119
11120                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11121
11122                 if (wakeup->disconnect &&
11123                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11124                         goto free_msg;
11125                 if (wakeup->magic_pkt &&
11126                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11127                         goto free_msg;
11128                 if (wakeup->gtk_rekey_failure &&
11129                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11130                         goto free_msg;
11131                 if (wakeup->eap_identity_req &&
11132                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11133                         goto free_msg;
11134                 if (wakeup->four_way_handshake &&
11135                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11136                         goto free_msg;
11137                 if (wakeup->rfkill_release &&
11138                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11139                         goto free_msg;
11140
11141                 if (wakeup->pattern_idx >= 0 &&
11142                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11143                                 wakeup->pattern_idx))
11144                         goto free_msg;
11145
11146                 if (wakeup->tcp_match)
11147                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
11148
11149                 if (wakeup->tcp_connlost)
11150                         nla_put_flag(msg,
11151                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
11152
11153                 if (wakeup->tcp_nomoretokens)
11154                         nla_put_flag(msg,
11155                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
11156
11157                 if (wakeup->packet) {
11158                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11159                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11160
11161                         if (!wakeup->packet_80211) {
11162                                 pkt_attr =
11163                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11164                                 len_attr =
11165                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11166                         }
11167
11168                         if (wakeup->packet_len &&
11169                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11170                                 goto free_msg;
11171
11172                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11173                                     wakeup->packet))
11174                                 goto free_msg;
11175                 }
11176
11177                 nla_nest_end(msg, reasons);
11178         }
11179
11180         genlmsg_end(msg, hdr);
11181
11182         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11183                                 nl80211_mlme_mcgrp.id, gfp);
11184         return;
11185
11186  free_msg:
11187         nlmsg_free(msg);
11188 }
11189 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11190 #endif
11191
11192 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11193                                 enum nl80211_tdls_operation oper,
11194                                 u16 reason_code, gfp_t gfp)
11195 {
11196         struct wireless_dev *wdev = dev->ieee80211_ptr;
11197         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11198         struct sk_buff *msg;
11199         void *hdr;
11200
11201         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11202                                          reason_code);
11203
11204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11205         if (!msg)
11206                 return;
11207
11208         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11209         if (!hdr) {
11210                 nlmsg_free(msg);
11211                 return;
11212         }
11213
11214         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11215             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11216             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11217             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11218             (reason_code > 0 &&
11219              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11220                 goto nla_put_failure;
11221
11222         genlmsg_end(msg, hdr);
11223
11224         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11225                                 nl80211_mlme_mcgrp.id, gfp);
11226         return;
11227
11228  nla_put_failure:
11229         genlmsg_cancel(msg, hdr);
11230         nlmsg_free(msg);
11231 }
11232 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11233
11234 static int nl80211_netlink_notify(struct notifier_block * nb,
11235                                   unsigned long state,
11236                                   void *_notify)
11237 {
11238         struct netlink_notify *notify = _notify;
11239         struct cfg80211_registered_device *rdev;
11240         struct wireless_dev *wdev;
11241         struct cfg80211_beacon_registration *reg, *tmp;
11242
11243         if (state != NETLINK_URELEASE)
11244                 return NOTIFY_DONE;
11245
11246         rcu_read_lock();
11247
11248         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11249                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11250                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11251
11252                 spin_lock_bh(&rdev->beacon_registrations_lock);
11253                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11254                                          list) {
11255                         if (reg->nlportid == notify->portid) {
11256                                 list_del(&reg->list);
11257                                 kfree(reg);
11258                                 break;
11259                         }
11260                 }
11261                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11262         }
11263
11264         rcu_read_unlock();
11265
11266         return NOTIFY_DONE;
11267 }
11268
11269 static struct notifier_block nl80211_netlink_notifier = {
11270         .notifier_call = nl80211_netlink_notify,
11271 };
11272
11273 void cfg80211_ft_event(struct net_device *netdev,
11274                        struct cfg80211_ft_event_params *ft_event)
11275 {
11276         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11277         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11278         struct sk_buff *msg;
11279         void *hdr;
11280
11281         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11282
11283         if (!ft_event->target_ap)
11284                 return;
11285
11286         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11287         if (!msg)
11288                 return;
11289
11290         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11291         if (!hdr) {
11292                 nlmsg_free(msg);
11293                 return;
11294         }
11295
11296         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
11297         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
11298         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
11299         if (ft_event->ies)
11300                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
11301         if (ft_event->ric_ies)
11302                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11303                         ft_event->ric_ies);
11304
11305         genlmsg_end(msg, hdr);
11306
11307         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11308                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
11309 }
11310 EXPORT_SYMBOL(cfg80211_ft_event);
11311
11312 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11313 {
11314         struct cfg80211_registered_device *rdev;
11315         struct sk_buff *msg;
11316         void *hdr;
11317         u32 nlportid;
11318
11319         rdev = wiphy_to_dev(wdev->wiphy);
11320         if (!rdev->crit_proto_nlportid)
11321                 return;
11322
11323         nlportid = rdev->crit_proto_nlportid;
11324         rdev->crit_proto_nlportid = 0;
11325
11326         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11327         if (!msg)
11328                 return;
11329
11330         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11331         if (!hdr)
11332                 goto nla_put_failure;
11333
11334         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11335             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11336                 goto nla_put_failure;
11337
11338         genlmsg_end(msg, hdr);
11339
11340         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11341         return;
11342
11343  nla_put_failure:
11344         if (hdr)
11345                 genlmsg_cancel(msg, hdr);
11346         nlmsg_free(msg);
11347
11348 }
11349 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11350
11351 /* initialisation/exit functions */
11352
11353 int nl80211_init(void)
11354 {
11355         int err;
11356
11357         err = genl_register_family_with_ops(&nl80211_fam,
11358                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
11359         if (err)
11360                 return err;
11361
11362         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
11363         if (err)
11364                 goto err_out;
11365
11366         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
11367         if (err)
11368                 goto err_out;
11369
11370         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
11371         if (err)
11372                 goto err_out;
11373
11374         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
11375         if (err)
11376                 goto err_out;
11377
11378 #ifdef CONFIG_NL80211_TESTMODE
11379         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
11380         if (err)
11381                 goto err_out;
11382 #endif
11383
11384         err = netlink_register_notifier(&nl80211_netlink_notifier);
11385         if (err)
11386                 goto err_out;
11387
11388         return 0;
11389  err_out:
11390         genl_unregister_family(&nl80211_fam);
11391         return err;
11392 }
11393
11394 void nl80211_exit(void)
11395 {
11396         netlink_unregister_notifier(&nl80211_netlink_notifier);
11397         genl_unregister_family(&nl80211_fam);
11398 }