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         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 362         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 363         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 364 };
 365
 366 /* policy for the key attributes */
 367 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 368         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 369         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 370         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 371         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 372         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 373         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 374         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 375         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 376 };
 377
 378 /* policy for the key default flags */
 379 static const struct nla_policy
 380 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 381         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 382         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 383 };
 384
 385 /* policy for WoWLAN attributes */
 386 static const struct nla_policy
 387 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 388         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 389         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 390         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 391         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 392         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 394         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 396         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 397 };
 398
 399 static const struct nla_policy
 400 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 401         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 402         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 403         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 404         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 405         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 406         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 407         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 408                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 409         },
 410         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 411                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 412         },
 413         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 414         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 415         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 416 };
 417
 418 /* policy for coalesce rule attributes */
 419 static const struct nla_policy
 420 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 421         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 422         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 423         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 424 };
 425
 426 /* policy for GTK rekey offload attributes */
 427 static const struct nla_policy
 428 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 429         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 430         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 431         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 432 };
 433
 434 static const struct nla_policy
 435 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 436         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 437                                                  .len = IEEE80211_MAX_SSID_LEN },
 438         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 439 };
 440
 441 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 442                                      struct netlink_callback *cb,
 443                                      struct cfg80211_registered_device **rdev,
 444                                      struct wireless_dev **wdev)
 445 {
 446         int err;
 447
 448         rtnl_lock();
 449
 450         if (!cb->args[0]) {
 451                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 452                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 453                                   nl80211_policy);
 454                 if (err)
 455                         goto out_unlock;
 456
 457                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 458                                                    nl80211_fam.attrbuf);
 459                 if (IS_ERR(*wdev)) {
 460                         err = PTR_ERR(*wdev);
 461                         goto out_unlock;
 462                 }
 463                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 464                 /* 0 is the first index - add 1 to parse only once */
 465                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 466                 cb->args[1] = (*wdev)->identifier;
 467         } else {
 468                 /* subtract the 1 again here */
 469                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 470                 struct wireless_dev *tmp;
 471
 472                 if (!wiphy) {
 473                         err = -ENODEV;
 474                         goto out_unlock;
 475                 }
 476                 *rdev = wiphy_to_dev(wiphy);
 477                 *wdev = NULL;
 478
 479                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 480                         if (tmp->identifier == cb->args[1]) {
 481                                 *wdev = tmp;
 482                                 break;
 483                         }
 484                 }
 485
 486                 if (!*wdev) {
 487                         err = -ENODEV;
 488                         goto out_unlock;
 489                 }
 490         }
 491
 492         return 0;
 493  out_unlock:
 494         rtnl_unlock();
 495         return err;
 496 }
 497
 498 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 499 {
 500         rtnl_unlock();
 501 }
 502
 503 /* IE validation */
 504 static bool is_valid_ie_attr(const struct nlattr *attr)
 505 {
 506         const u8 *pos;
 507         int len;
 508
 509         if (!attr)
 510                 return true;
 511
 512         pos = nla_data(attr);
 513         len = nla_len(attr);
 514
 515         while (len) {
 516                 u8 elemlen;
 517
 518                 if (len < 2)
 519                         return false;
 520                 len -= 2;
 521
 522                 elemlen = pos[1];
 523                 if (elemlen > len)
 524                         return false;
 525
 526                 len -= elemlen;
 527                 pos += 2 + elemlen;
 528         }
 529
 530         return true;
 531 }
 532
 533 /* message building helper */
 534 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 535                                    int flags, u8 cmd)
 536 {
 537         /* since there is no private header just add the generic one */
 538         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 539 }
 540
 541 static int nl80211_msg_put_channel(struct sk_buff *msg,
 542                                    struct ieee80211_channel *chan,
 543                                    bool large)
 544 {
 545         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 546                         chan->center_freq))
 547                 goto nla_put_failure;
 548
 549         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 550             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 551                 goto nla_put_failure;
 552         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 553                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 554                         goto nla_put_failure;
 555                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 556                         goto nla_put_failure;
 557         }
 558         if (chan->flags & IEEE80211_CHAN_RADAR) {
 559                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 560                         goto nla_put_failure;
 561                 if (large) {
 562                         u32 time;
 563
 564                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 565
 566                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 567                                         chan->dfs_state))
 568                                 goto nla_put_failure;
 569                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 570                                         time))
 571                                 goto nla_put_failure;
 572                 }
 573         }
 574
 575         if (large) {
 576                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 577                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 578                         goto nla_put_failure;
 579                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 580                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 581                         goto nla_put_failure;
 582                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 583                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 584                         goto nla_put_failure;
 585                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 586                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 587                         goto nla_put_failure;
 588         }
 589
 590         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 591                         DBM_TO_MBM(chan->max_power)))
 592                 goto nla_put_failure;
 593
 594         return 0;
 595
 596  nla_put_failure:
 597         return -ENOBUFS;
 598 }
 599
 600 /* netlink command implementations */
 601
 602 struct key_parse {
 603         struct key_params p;
 604         int idx;
 605         int type;
 606         bool def, defmgmt;
 607         bool def_uni, def_multi;
 608 };
 609
 610 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 611 {
 612         struct nlattr *tb[NL80211_KEY_MAX + 1];
 613         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 614                                    nl80211_key_policy);
 615         if (err)
 616                 return err;
 617
 618         k->def = !!tb[NL80211_KEY_DEFAULT];
 619         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 620
 621         if (k->def) {
 622                 k->def_uni = true;
 623                 k->def_multi = true;
 624         }
 625         if (k->defmgmt)
 626                 k->def_multi = true;
 627
 628         if (tb[NL80211_KEY_IDX])
 629                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 630
 631         if (tb[NL80211_KEY_DATA]) {
 632                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 633                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 634         }
 635
 636         if (tb[NL80211_KEY_SEQ]) {
 637                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 638                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 639         }
 640
 641         if (tb[NL80211_KEY_CIPHER])
 642                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 643
 644         if (tb[NL80211_KEY_TYPE]) {
 645                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 646                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 647                         return -EINVAL;
 648         }
 649
 650         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 651                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 652                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 653                                        tb[NL80211_KEY_DEFAULT_TYPES],
 654                                        nl80211_key_default_policy);
 655                 if (err)
 656                         return err;
 657
 658                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 659                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 660         }
 661
 662         return 0;
 663 }
 664
 665 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 666 {
 667         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 668                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 669                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 670         }
 671
 672         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 673                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 674                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 675         }
 676
 677         if (info->attrs[NL80211_ATTR_KEY_IDX])
 678                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 679
 680         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 681                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 682
 683         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 684         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 685
 686         if (k->def) {
 687                 k->def_uni = true;
 688                 k->def_multi = true;
 689         }
 690         if (k->defmgmt)
 691                 k->def_multi = true;
 692
 693         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 694                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 695                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 696                         return -EINVAL;
 697         }
 698
 699         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 700                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 701                 int err = nla_parse_nested(
 702                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 703                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 704                                 nl80211_key_default_policy);
 705                 if (err)
 706                         return err;
 707
 708                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 709                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 710         }
 711
 712         return 0;
 713 }
 714
 715 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 716 {
 717         int err;
 718
 719         memset(k, 0, sizeof(*k));
 720         k->idx = -1;
 721         k->type = -1;
 722
 723         if (info->attrs[NL80211_ATTR_KEY])
 724                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 725         else
 726                 err = nl80211_parse_key_old(info, k);
 727
 728         if (err)
 729                 return err;
 730
 731         if (k->def && k->defmgmt)
 732                 return -EINVAL;
 733
 734         if (k->defmgmt) {
 735                 if (k->def_uni || !k->def_multi)
 736                         return -EINVAL;
 737         }
 738
 739         if (k->idx != -1) {
 740                 if (k->defmgmt) {
 741                         if (k->idx < 4 || k->idx > 5)
 742                                 return -EINVAL;
 743                 } else if (k->def) {
 744                         if (k->idx < 0 || k->idx > 3)
 745                                 return -EINVAL;
 746                 } else {
 747                         if (k->idx < 0 || k->idx > 5)
 748                                 return -EINVAL;
 749                 }
 750         }
 751
 752         return 0;
 753 }
 754
 755 static struct cfg80211_cached_keys *
 756 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 757                        struct nlattr *keys, bool *no_ht)
 758 {
 759         struct key_parse parse;
 760         struct nlattr *key;
 761         struct cfg80211_cached_keys *result;
 762         int rem, err, def = 0;
 763
 764         result = kzalloc(sizeof(*result), GFP_KERNEL);
 765         if (!result)
 766                 return ERR_PTR(-ENOMEM);
 767
 768         result->def = -1;
 769         result->defmgmt = -1;
 770
 771         nla_for_each_nested(key, keys, rem) {
 772                 memset(&parse, 0, sizeof(parse));
 773                 parse.idx = -1;
 774
 775                 err = nl80211_parse_key_new(key, &parse);
 776                 if (err)
 777                         goto error;
 778                 err = -EINVAL;
 779                 if (!parse.p.key)
 780                         goto error;
 781                 if (parse.idx < 0 || parse.idx > 4)
 782                         goto error;
 783                 if (parse.def) {
 784                         if (def)
 785                                 goto error;
 786                         def = 1;
 787                         result->def = parse.idx;
 788                         if (!parse.def_uni || !parse.def_multi)
 789                                 goto error;
 790                 } else if (parse.defmgmt)
 791                         goto error;
 792                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 793                                                      parse.idx, false, NULL);
 794                 if (err)
 795                         goto error;
 796                 result->params[parse.idx].cipher = parse.p.cipher;
 797                 result->params[parse.idx].key_len = parse.p.key_len;
 798                 result->params[parse.idx].key = result->data[parse.idx];
 799                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 800
 801                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 802                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 803                         if (no_ht)
 804                                 *no_ht = true;
 805                 }
 806         }
 807
 808         return result;
 809  error:
 810         kfree(result);
 811         return ERR_PTR(err);
 812 }
 813
 814 static int nl80211_key_allowed(struct wireless_dev *wdev)
 815 {
 816         ASSERT_WDEV_LOCK(wdev);
 817
 818         switch (wdev->iftype) {
 819         case NL80211_IFTYPE_AP:
 820         case NL80211_IFTYPE_AP_VLAN:
 821         case NL80211_IFTYPE_P2P_GO:
 822         case NL80211_IFTYPE_MESH_POINT:
 823                 break;
 824         case NL80211_IFTYPE_ADHOC:
 825         case NL80211_IFTYPE_STATION:
 826         case NL80211_IFTYPE_P2P_CLIENT:
 827                 if (!wdev->current_bss)
 828                         return -ENOLINK;
 829                 break;
 830         default:
 831                 return -EINVAL;
 832         }
 833
 834         return 0;
 835 }
 836
 837 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 838 {
 839         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 840         int i;
 841
 842         if (!nl_modes)
 843                 goto nla_put_failure;
 844
 845         i = 0;
 846         while (ifmodes) {
 847                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 848                         goto nla_put_failure;
 849                 ifmodes >>= 1;
 850                 i++;
 851         }
 852
 853         nla_nest_end(msg, nl_modes);
 854         return 0;
 855
 856 nla_put_failure:
 857         return -ENOBUFS;
 858 }
 859
 860 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 861                                           struct sk_buff *msg,
 862                                           bool large)
 863 {
 864         struct nlattr *nl_combis;
 865         int i, j;
 866
 867         nl_combis = nla_nest_start(msg,
 868                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 869         if (!nl_combis)
 870                 goto nla_put_failure;
 871
 872         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 873                 const struct ieee80211_iface_combination *c;
 874                 struct nlattr *nl_combi, *nl_limits;
 875
 876                 c = &wiphy->iface_combinations[i];
 877
 878                 nl_combi = nla_nest_start(msg, i + 1);
 879                 if (!nl_combi)
 880                         goto nla_put_failure;
 881
 882                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 883                 if (!nl_limits)
 884                         goto nla_put_failure;
 885
 886                 for (j = 0; j < c->n_limits; j++) {
 887                         struct nlattr *nl_limit;
 888
 889                         nl_limit = nla_nest_start(msg, j + 1);
 890                         if (!nl_limit)
 891                                 goto nla_put_failure;
 892                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 893                                         c->limits[j].max))
 894                                 goto nla_put_failure;
 895                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 896                                                 c->limits[j].types))
 897                                 goto nla_put_failure;
 898                         nla_nest_end(msg, nl_limit);
 899                 }
 900
 901                 nla_nest_end(msg, nl_limits);
 902
 903                 if (c->beacon_int_infra_match &&
 904                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 905                         goto nla_put_failure;
 906                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 907                                 c->num_different_channels) ||
 908                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 909                                 c->max_interfaces))
 910                         goto nla_put_failure;
 911                 if (large &&
 912                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 913                                 c->radar_detect_widths))
 914                         goto nla_put_failure;
 915
 916                 nla_nest_end(msg, nl_combi);
 917         }
 918
 919         nla_nest_end(msg, nl_combis);
 920
 921         return 0;
 922 nla_put_failure:
 923         return -ENOBUFS;
 924 }
 925
 926 #ifdef CONFIG_PM
 927 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 928                                         struct sk_buff *msg)
 929 {
 930         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 931         struct nlattr *nl_tcp;
 932
 933         if (!tcp)
 934                 return 0;
 935
 936         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 937         if (!nl_tcp)
 938                 return -ENOBUFS;
 939
 940         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 941                         tcp->data_payload_max))
 942                 return -ENOBUFS;
 943
 944         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 945                         tcp->data_payload_max))
 946                 return -ENOBUFS;
 947
 948         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 949                 return -ENOBUFS;
 950
 951         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 952                                 sizeof(*tcp->tok), tcp->tok))
 953                 return -ENOBUFS;
 954
 955         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 956                         tcp->data_interval_max))
 957                 return -ENOBUFS;
 958
 959         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 960                         tcp->wake_payload_max))
 961                 return -ENOBUFS;
 962
 963         nla_nest_end(msg, nl_tcp);
 964         return 0;
 965 }
 966
 967 static int nl80211_send_wowlan(struct sk_buff *msg,
 968                                struct cfg80211_registered_device *dev,
 969                                bool large)
 970 {
 971         struct nlattr *nl_wowlan;
 972
 973         if (!dev->wiphy.wowlan)
 974                 return 0;
 975
 976         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 977         if (!nl_wowlan)
 978                 return -ENOBUFS;
 979
 980         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 981              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 982             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 983              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 984             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 985              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 986             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 987              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 988             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 989              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 990             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 991              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 992             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 993              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 994             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 995              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 996                 return -ENOBUFS;
 997
 998         if (dev->wiphy.wowlan->n_patterns) {
 999                 struct nl80211_pattern_support pat = {
1000                         .max_patterns = dev->wiphy.wowlan->n_patterns,
1001                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
1002                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
1003                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
1004                 };
1005
1006                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1007                             sizeof(pat), &pat))
1008                         return -ENOBUFS;
1009         }
1010
1011         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1012                 return -ENOBUFS;
1013
1014         nla_nest_end(msg, nl_wowlan);
1015
1016         return 0;
1017 }
1018 #endif
1019
1020 static int nl80211_send_coalesce(struct sk_buff *msg,
1021                                  struct cfg80211_registered_device *dev)
1022 {
1023         struct nl80211_coalesce_rule_support rule;
1024
1025         if (!dev->wiphy.coalesce)
1026                 return 0;
1027
1028         rule.max_rules = dev->wiphy.coalesce->n_rules;
1029         rule.max_delay = dev->wiphy.coalesce->max_delay;
1030         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1031         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1032         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1033         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1034
1035         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1036                 return -ENOBUFS;
1037
1038         return 0;
1039 }
1040
1041 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1042                                       struct ieee80211_supported_band *sband)
1043 {
1044         struct nlattr *nl_rates, *nl_rate;
1045         struct ieee80211_rate *rate;
1046         int i;
1047
1048         /* add HT info */
1049         if (sband->ht_cap.ht_supported &&
1050             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1051                      sizeof(sband->ht_cap.mcs),
1052                      &sband->ht_cap.mcs) ||
1053              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1054                          sband->ht_cap.cap) ||
1055              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1056                         sband->ht_cap.ampdu_factor) ||
1057              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1058                         sband->ht_cap.ampdu_density)))
1059                 return -ENOBUFS;
1060
1061         /* add VHT info */
1062         if (sband->vht_cap.vht_supported &&
1063             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1064                      sizeof(sband->vht_cap.vht_mcs),
1065                      &sband->vht_cap.vht_mcs) ||
1066              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1067                          sband->vht_cap.cap)))
1068                 return -ENOBUFS;
1069
1070         /* add bitrates */
1071         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1072         if (!nl_rates)
1073                 return -ENOBUFS;
1074
1075         for (i = 0; i < sband->n_bitrates; i++) {
1076                 nl_rate = nla_nest_start(msg, i);
1077                 if (!nl_rate)
1078                         return -ENOBUFS;
1079
1080                 rate = &sband->bitrates[i];
1081                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1082                                 rate->bitrate))
1083                         return -ENOBUFS;
1084                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1085                     nla_put_flag(msg,
1086                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1087                         return -ENOBUFS;
1088
1089                 nla_nest_end(msg, nl_rate);
1090         }
1091
1092         nla_nest_end(msg, nl_rates);
1093
1094         return 0;
1095 }
1096
1097 static int
1098 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1099                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1100 {
1101         u16 stypes;
1102         struct nlattr *nl_ftypes, *nl_ifs;
1103         enum nl80211_iftype ift;
1104         int i;
1105
1106         if (!mgmt_stypes)
1107                 return 0;
1108
1109         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1110         if (!nl_ifs)
1111                 return -ENOBUFS;
1112
1113         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1114                 nl_ftypes = nla_nest_start(msg, ift);
1115                 if (!nl_ftypes)
1116                         return -ENOBUFS;
1117                 i = 0;
1118                 stypes = mgmt_stypes[ift].tx;
1119                 while (stypes) {
1120                         if ((stypes & 1) &&
1121                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1122                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1123                                 return -ENOBUFS;
1124                         stypes >>= 1;
1125                         i++;
1126                 }
1127                 nla_nest_end(msg, nl_ftypes);
1128         }
1129
1130         nla_nest_end(msg, nl_ifs);
1131
1132         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1133         if (!nl_ifs)
1134                 return -ENOBUFS;
1135
1136         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1137                 nl_ftypes = nla_nest_start(msg, ift);
1138                 if (!nl_ftypes)
1139                         return -ENOBUFS;
1140                 i = 0;
1141                 stypes = mgmt_stypes[ift].rx;
1142                 while (stypes) {
1143                         if ((stypes & 1) &&
1144                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1145                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1146                                 return -ENOBUFS;
1147                         stypes >>= 1;
1148                         i++;
1149                 }
1150                 nla_nest_end(msg, nl_ftypes);
1151         }
1152         nla_nest_end(msg, nl_ifs);
1153
1154         return 0;
1155 }
1156
1157 struct nl80211_dump_wiphy_state {
1158         s64 filter_wiphy;
1159         long start;
1160         long split_start, band_start, chan_start;
1161         bool split;
1162 };
1163
1164 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1165                               struct sk_buff *msg, u32 portid, u32 seq,
1166                               int flags, struct nl80211_dump_wiphy_state *state)
1167 {
1168         void *hdr;
1169         struct nlattr *nl_bands, *nl_band;
1170         struct nlattr *nl_freqs, *nl_freq;
1171         struct nlattr *nl_cmds;
1172         struct nlattr *nl_vendor_cmds;
1173         enum ieee80211_band band;
1174         struct ieee80211_channel *chan;
1175         int i;
1176         const struct ieee80211_txrx_stypes *mgmt_stypes =
1177                                 dev->wiphy.mgmt_stypes;
1178         u32 features;
1179
1180         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1181         if (!hdr)
1182                 return -ENOBUFS;
1183
1184         if (WARN_ON(!state))
1185                 return -EINVAL;
1186
1187         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1188             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1189                            wiphy_name(&dev->wiphy)) ||
1190             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1191                         cfg80211_rdev_list_generation))
1192                 goto nla_put_failure;
1193
1194         switch (state->split_start) {
1195         case 0:
1196                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1197                                dev->wiphy.retry_short) ||
1198                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1199                                dev->wiphy.retry_long) ||
1200                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1201                                 dev->wiphy.frag_threshold) ||
1202                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1203                                 dev->wiphy.rts_threshold) ||
1204                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1205                                dev->wiphy.coverage_class) ||
1206                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1207                                dev->wiphy.max_scan_ssids) ||
1208                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1209                                dev->wiphy.max_sched_scan_ssids) ||
1210                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1211                                 dev->wiphy.max_scan_ie_len) ||
1212                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1213                                 dev->wiphy.max_sched_scan_ie_len) ||
1214                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1215                                dev->wiphy.max_match_sets))
1216                         goto nla_put_failure;
1217
1218                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1219                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1220                         goto nla_put_failure;
1221                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1222                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1223                         goto nla_put_failure;
1224                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1225                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1226                         goto nla_put_failure;
1227                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1228                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1229                         goto nla_put_failure;
1230                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1231                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1232                         goto nla_put_failure;
1233                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1234                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1235                         goto nla_put_failure;
1236                 state->split_start++;
1237                 if (state->split)
1238                         break;
1239         case 1:
1240                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1241                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1242                             dev->wiphy.cipher_suites))
1243                         goto nla_put_failure;
1244
1245                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1246                                dev->wiphy.max_num_pmkids))
1247                         goto nla_put_failure;
1248
1249                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1250                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1251                         goto nla_put_failure;
1252
1253                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1254                                 dev->wiphy.available_antennas_tx) ||
1255                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1256                                 dev->wiphy.available_antennas_rx))
1257                         goto nla_put_failure;
1258
1259                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1260                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1261                                 dev->wiphy.probe_resp_offload))
1262                         goto nla_put_failure;
1263
1264                 if ((dev->wiphy.available_antennas_tx ||
1265                      dev->wiphy.available_antennas_rx) &&
1266                     dev->ops->get_antenna) {
1267                         u32 tx_ant = 0, rx_ant = 0;
1268                         int res;
1269                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1270                         if (!res) {
1271                                 if (nla_put_u32(msg,
1272                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1273                                                 tx_ant) ||
1274                                     nla_put_u32(msg,
1275                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1276                                                 rx_ant))
1277                                         goto nla_put_failure;
1278                         }
1279                 }
1280
1281                 state->split_start++;
1282                 if (state->split)
1283                         break;
1284         case 2:
1285                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1286                                         dev->wiphy.interface_modes))
1287                                 goto nla_put_failure;
1288                 state->split_start++;
1289                 if (state->split)
1290                         break;
1291         case 3:
1292                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1293                 if (!nl_bands)
1294                         goto nla_put_failure;
1295
1296                 for (band = state->band_start;
1297                      band < IEEE80211_NUM_BANDS; band++) {
1298                         struct ieee80211_supported_band *sband;
1299
1300                         sband = dev->wiphy.bands[band];
1301
1302                         if (!sband)
1303                                 continue;
1304
1305                         nl_band = nla_nest_start(msg, band);
1306                         if (!nl_band)
1307                                 goto nla_put_failure;
1308
1309                         switch (state->chan_start) {
1310                         case 0:
1311                                 if (nl80211_send_band_rateinfo(msg, sband))
1312                                         goto nla_put_failure;
1313                                 state->chan_start++;
1314                                 if (state->split)
1315                                         break;
1316                         default:
1317                                 /* add frequencies */
1318                                 nl_freqs = nla_nest_start(
1319                                         msg, NL80211_BAND_ATTR_FREQS);
1320                                 if (!nl_freqs)
1321                                         goto nla_put_failure;
1322
1323                                 for (i = state->chan_start - 1;
1324                                      i < sband->n_channels;
1325                                      i++) {
1326                                         nl_freq = nla_nest_start(msg, i);
1327                                         if (!nl_freq)
1328                                                 goto nla_put_failure;
1329
1330                                         chan = &sband->channels[i];
1331
1332                                         if (nl80211_msg_put_channel(
1333                                                         msg, chan,
1334                                                         state->split))
1335                                                 goto nla_put_failure;
1336
1337                                         nla_nest_end(msg, nl_freq);
1338                                         if (state->split)
1339                                                 break;
1340                                 }
1341                                 if (i < sband->n_channels)
1342                                         state->chan_start = i + 2;
1343                                 else
1344                                         state->chan_start = 0;
1345                                 nla_nest_end(msg, nl_freqs);
1346                         }
1347
1348                         nla_nest_end(msg, nl_band);
1349
1350                         if (state->split) {
1351                                 /* start again here */
1352                                 if (state->chan_start)
1353                                         band--;
1354                                 break;
1355                         }
1356                 }
1357                 nla_nest_end(msg, nl_bands);
1358
1359                 if (band < IEEE80211_NUM_BANDS)
1360                         state->band_start = band + 1;
1361                 else
1362                         state->band_start = 0;
1363
1364                 /* if bands & channels are done, continue outside */
1365                 if (state->band_start == 0 && state->chan_start == 0)
1366                         state->split_start++;
1367                 if (state->split)
1368                         break;
1369         case 4:
1370                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1371                 if (!nl_cmds)
1372                         goto nla_put_failure;
1373
1374                 i = 0;
1375 #define CMD(op, n)                                                      \
1376                  do {                                                   \
1377                         if (dev->ops->op) {                             \
1378                                 i++;                                    \
1379                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1380                                         goto nla_put_failure;           \
1381                         }                                               \
1382                 } while (0)
1383
1384                 CMD(add_virtual_intf, NEW_INTERFACE);
1385                 CMD(change_virtual_intf, SET_INTERFACE);
1386                 CMD(add_key, NEW_KEY);
1387                 CMD(start_ap, START_AP);
1388                 CMD(add_station, NEW_STATION);
1389                 CMD(add_mpath, NEW_MPATH);
1390                 CMD(update_mesh_config, SET_MESH_CONFIG);
1391                 CMD(change_bss, SET_BSS);
1392                 CMD(auth, AUTHENTICATE);
1393                 CMD(assoc, ASSOCIATE);
1394                 CMD(deauth, DEAUTHENTICATE);
1395                 CMD(disassoc, DISASSOCIATE);
1396                 CMD(join_ibss, JOIN_IBSS);
1397                 CMD(join_mesh, JOIN_MESH);
1398                 CMD(set_pmksa, SET_PMKSA);
1399                 CMD(del_pmksa, DEL_PMKSA);
1400                 CMD(flush_pmksa, FLUSH_PMKSA);
1401                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1402                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1403                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1404                 CMD(mgmt_tx, FRAME);
1405                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1406                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1407                         i++;
1408                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1409                                 goto nla_put_failure;
1410                 }
1411                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1412                     dev->ops->join_mesh) {
1413                         i++;
1414                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1415                                 goto nla_put_failure;
1416                 }
1417                 CMD(set_wds_peer, SET_WDS_PEER);
1418                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1419                         CMD(tdls_mgmt, TDLS_MGMT);
1420                         CMD(tdls_oper, TDLS_OPER);
1421                 }
1422                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1423                         CMD(sched_scan_start, START_SCHED_SCAN);
1424                 CMD(probe_client, PROBE_CLIENT);
1425                 CMD(set_noack_map, SET_NOACK_MAP);
1426                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1427                         i++;
1428                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1429                                 goto nla_put_failure;
1430                 }
1431                 CMD(start_p2p_device, START_P2P_DEVICE);
1432                 CMD(set_mcast_rate, SET_MCAST_RATE);
1433                 if (state->split) {
1434                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1435                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1436                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1437                                 CMD(channel_switch, CHANNEL_SWITCH);
1438                 }
1439
1440 #ifdef CONFIG_NL80211_TESTMODE
1441                 CMD(testmode_cmd, TESTMODE);
1442 #endif
1443
1444 #undef CMD
1445
1446                 if (dev->ops->connect || dev->ops->auth) {
1447                         i++;
1448                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1449                                 goto nla_put_failure;
1450                 }
1451
1452                 if (dev->ops->disconnect || dev->ops->deauth) {
1453                         i++;
1454                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1455                                 goto nla_put_failure;
1456                 }
1457
1458                 nla_nest_end(msg, nl_cmds);
1459                 state->split_start++;
1460                 if (state->split)
1461                         break;
1462         case 5:
1463                 if (dev->ops->remain_on_channel &&
1464                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1465                     nla_put_u32(msg,
1466                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1467                                 dev->wiphy.max_remain_on_channel_duration))
1468                         goto nla_put_failure;
1469
1470                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1471                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1472                         goto nla_put_failure;
1473
1474                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1475                         goto nla_put_failure;
1476                 state->split_start++;
1477                 if (state->split)
1478                         break;
1479         case 6:
1480 #ifdef CONFIG_PM
1481                 if (nl80211_send_wowlan(msg, dev, state->split))
1482                         goto nla_put_failure;
1483                 state->split_start++;
1484                 if (state->split)
1485                         break;
1486 #else
1487                 state->split_start++;
1488 #endif
1489         case 7:
1490                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1491                                         dev->wiphy.software_iftypes))
1492                         goto nla_put_failure;
1493
1494                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1495                                                    state->split))
1496                         goto nla_put_failure;
1497
1498                 state->split_start++;
1499                 if (state->split)
1500                         break;
1501         case 8:
1502                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1503                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1504                                 dev->wiphy.ap_sme_capa))
1505                         goto nla_put_failure;
1506
1507                 features = dev->wiphy.features;
1508                 /*
1509                  * We can only add the per-channel limit information if the
1510                  * dump is split, otherwise it makes it too big. Therefore
1511                  * only advertise it in that case.
1512                  */
1513                 if (state->split)
1514                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1515                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1516                         goto nla_put_failure;
1517
1518                 if (dev->wiphy.ht_capa_mod_mask &&
1519                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1520                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1521                             dev->wiphy.ht_capa_mod_mask))
1522                         goto nla_put_failure;
1523
1524                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1525                     dev->wiphy.max_acl_mac_addrs &&
1526                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1527                                 dev->wiphy.max_acl_mac_addrs))
1528                         goto nla_put_failure;
1529
1530                 /*
1531                  * Any information below this point is only available to
1532                  * applications that can deal with it being split. This
1533                  * helps ensure that newly added capabilities don't break
1534                  * older tools by overrunning their buffers.
1535                  *
1536                  * We still increment split_start so that in the split
1537                  * case we'll continue with more data in the next round,
1538                  * but break unconditionally so unsplit data stops here.
1539                  */
1540                 state->split_start++;
1541                 break;
1542         case 9:
1543                 if (dev->wiphy.extended_capabilities &&
1544                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1545                              dev->wiphy.extended_capabilities_len,
1546                              dev->wiphy.extended_capabilities) ||
1547                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1548                              dev->wiphy.extended_capabilities_len,
1549                              dev->wiphy.extended_capabilities_mask)))
1550                         goto nla_put_failure;
1551
1552                 if (dev->wiphy.vht_capa_mod_mask &&
1553                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1554                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1555                             dev->wiphy.vht_capa_mod_mask))
1556                         goto nla_put_failure;
1557
1558                 state->split_start++;
1559                 break;
1560         case 10:
1561                 if (nl80211_send_coalesce(msg, dev))
1562                         goto nla_put_failure;
1563
1564                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1565                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1566                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1567                         goto nla_put_failure;
1568                 state->split_start++;
1569                 break;
1570         case 11:
1571                 nl_vendor_cmds = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1572                 if (!nl_vendor_cmds)
1573                         goto nla_put_failure;
1574
1575                 for (i = 0; i < dev->wiphy.n_vendor_commands; i++)
1576                         if (nla_put(msg, i + 1,
1577                                     sizeof(struct nl80211_vendor_cmd_info),
1578                                     &dev->wiphy.vendor_commands[i].info))
1579                                 goto nla_put_failure;
1580                 nla_nest_end(msg, nl_vendor_cmds);
1581
1582                 /* done */
1583                 state->split_start = 0;
1584                 break;
1585         }
1586         return genlmsg_end(msg, hdr);
1587
1588  nla_put_failure:
1589         genlmsg_cancel(msg, hdr);
1590         return -EMSGSIZE;
1591 }
1592
1593 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1594                                     struct netlink_callback *cb,
1595                                     struct nl80211_dump_wiphy_state *state)
1596 {
1597         struct nlattr **tb = nl80211_fam.attrbuf;
1598         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1599                               tb, nl80211_fam.maxattr, nl80211_policy);
1600         /* ignore parse errors for backward compatibility */
1601         if (ret)
1602                 return 0;
1603
1604         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1605         if (tb[NL80211_ATTR_WIPHY])
1606                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1607         if (tb[NL80211_ATTR_WDEV])
1608                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1609         if (tb[NL80211_ATTR_IFINDEX]) {
1610                 struct net_device *netdev;
1611                 struct cfg80211_registered_device *rdev;
1612                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1613
1614                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1615                 if (!netdev)
1616                         return -ENODEV;
1617                 if (netdev->ieee80211_ptr) {
1618                         rdev = wiphy_to_dev(
1619                                 netdev->ieee80211_ptr->wiphy);
1620                         state->filter_wiphy = rdev->wiphy_idx;
1621                 }
1622                 dev_put(netdev);
1623         }
1624
1625         return 0;
1626 }
1627
1628 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1629 {
1630         int idx = 0, ret;
1631         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1632         struct cfg80211_registered_device *dev;
1633
1634         rtnl_lock();
1635         if (!state) {
1636                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1637                 if (!state) {
1638                         rtnl_unlock();
1639                         return -ENOMEM;
1640                 }
1641                 state->filter_wiphy = -1;
1642                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1643                 if (ret) {
1644                         kfree(state);
1645                         rtnl_unlock();
1646                         return ret;
1647                 }
1648                 cb->args[0] = (long)state;
1649         }
1650
1651         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1652                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1653                         continue;
1654                 if (++idx <= state->start)
1655                         continue;
1656                 if (state->filter_wiphy != -1 &&
1657                     state->filter_wiphy != dev->wiphy_idx)
1658                         continue;
1659                 /* attempt to fit multiple wiphy data chunks into the skb */
1660                 do {
1661                         ret = nl80211_send_wiphy(dev, skb,
1662                                                  NETLINK_CB(cb->skb).portid,
1663                                                  cb->nlh->nlmsg_seq,
1664                                                  NLM_F_MULTI, state);
1665                         if (ret < 0) {
1666                                 /*
1667                                  * If sending the wiphy data didn't fit (ENOBUFS
1668                                  * or EMSGSIZE returned), this SKB is still
1669                                  * empty (so it's not too big because another
1670                                  * wiphy dataset is already in the skb) and
1671                                  * we've not tried to adjust the dump allocation
1672                                  * yet ... then adjust the alloc size to be
1673                                  * bigger, and return 1 but with the empty skb.
1674                                  * This results in an empty message being RX'ed
1675                                  * in userspace, but that is ignored.
1676                                  *
1677                                  * We can then retry with the larger buffer.
1678                                  */
1679                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1680                                     !skb->len &&
1681                                     cb->min_dump_alloc < 4096) {
1682                                         cb->min_dump_alloc = 4096;
1683                                         rtnl_unlock();
1684                                         return 1;
1685                                 }
1686                                 idx--;
1687                                 break;
1688                         }
1689                 } while (state->split_start > 0);
1690                 break;
1691         }
1692         rtnl_unlock();
1693
1694         state->start = idx;
1695
1696         return skb->len;
1697 }
1698
1699 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1700 {
1701         kfree((void *)cb->args[0]);
1702         return 0;
1703 }
1704
1705 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1706 {
1707         struct sk_buff *msg;
1708         struct cfg80211_registered_device *dev = info->user_ptr[0];
1709         struct nl80211_dump_wiphy_state state = {};
1710
1711         msg = nlmsg_new(4096, GFP_KERNEL);
1712         if (!msg)
1713                 return -ENOMEM;
1714
1715         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1716                                &state) < 0) {
1717                 nlmsg_free(msg);
1718                 return -ENOBUFS;
1719         }
1720
1721         return genlmsg_reply(msg, info);
1722 }
1723
1724 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1725         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1726         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1727         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1728         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1729         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1730 };
1731
1732 static int parse_txq_params(struct nlattr *tb[],
1733                             struct ieee80211_txq_params *txq_params)
1734 {
1735         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1736             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1737             !tb[NL80211_TXQ_ATTR_AIFS])
1738                 return -EINVAL;
1739
1740         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1741         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1742         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1743         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1744         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1745
1746         if (txq_params->ac >= NL80211_NUM_ACS)
1747                 return -EINVAL;
1748
1749         return 0;
1750 }
1751
1752 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1753 {
1754         /*
1755          * You can only set the channel explicitly for WDS interfaces,
1756          * all others have their channel managed via their respective
1757          * "establish a connection" command (connect, join, ...)
1758          *
1759          * For AP/GO and mesh mode, the channel can be set with the
1760          * channel userspace API, but is only stored and passed to the
1761          * low-level driver when the AP starts or the mesh is joined.
1762          * This is for backward compatibility, userspace can also give
1763          * the channel in the start-ap or join-mesh commands instead.
1764          *
1765          * Monitors are special as they are normally slaved to
1766          * whatever else is going on, so they have their own special
1767          * operation to set the monitor channel if possible.
1768          */
1769         return !wdev ||
1770                 wdev->iftype == NL80211_IFTYPE_AP ||
1771                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1772                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1773                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1774 }
1775
1776 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1777                                  struct genl_info *info,
1778                                  struct cfg80211_chan_def *chandef)
1779 {
1780         u32 control_freq;
1781
1782         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1783                 return -EINVAL;
1784
1785         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1786
1787         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1788         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1789         chandef->center_freq1 = control_freq;
1790         chandef->center_freq2 = 0;
1791
1792         /* Primary channel not allowed */
1793         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1794                 return -EINVAL;
1795
1796         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1797                 enum nl80211_channel_type chantype;
1798
1799                 chantype = nla_get_u32(
1800                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1801
1802                 switch (chantype) {
1803                 case NL80211_CHAN_NO_HT:
1804                 case NL80211_CHAN_HT20:
1805                 case NL80211_CHAN_HT40PLUS:
1806                 case NL80211_CHAN_HT40MINUS:
1807                         cfg80211_chandef_create(chandef, chandef->chan,
1808                                                 chantype);
1809                         break;
1810                 default:
1811                         return -EINVAL;
1812                 }
1813         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1814                 chandef->width =
1815                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1816                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1817                         chandef->center_freq1 =
1818                                 nla_get_u32(
1819                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1820                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1821                         chandef->center_freq2 =
1822                                 nla_get_u32(
1823                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1824         }
1825
1826         if (!cfg80211_chandef_valid(chandef))
1827                 return -EINVAL;
1828
1829         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1830                                      IEEE80211_CHAN_DISABLED))
1831                 return -EINVAL;
1832
1833         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1834              chandef->width == NL80211_CHAN_WIDTH_10) &&
1835             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1836                 return -EINVAL;
1837
1838         return 0;
1839 }
1840
1841 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1842                                  struct wireless_dev *wdev,
1843                                  struct genl_info *info)
1844 {
1845         struct cfg80211_chan_def chandef;
1846         int result;
1847         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1848
1849         if (wdev)
1850                 iftype = wdev->iftype;
1851
1852         if (!nl80211_can_set_dev_channel(wdev))
1853                 return -EOPNOTSUPP;
1854
1855         result = nl80211_parse_chandef(rdev, info, &chandef);
1856         if (result)
1857                 return result;
1858
1859         switch (iftype) {
1860         case NL80211_IFTYPE_AP:
1861         case NL80211_IFTYPE_P2P_GO:
1862                 if (wdev->beacon_interval) {
1863                         result = -EBUSY;
1864                         break;
1865                 }
1866                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1867                         result = -EINVAL;
1868                         break;
1869                 }
1870                 wdev->preset_chandef = chandef;
1871                 result = 0;
1872                 break;
1873         case NL80211_IFTYPE_MESH_POINT:
1874                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1875                 break;
1876         case NL80211_IFTYPE_MONITOR:
1877                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1878                 break;
1879         default:
1880                 result = -EINVAL;
1881         }
1882
1883         return result;
1884 }
1885
1886 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1887 {
1888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1889         struct net_device *netdev = info->user_ptr[1];
1890
1891         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1892 }
1893
1894 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1895 {
1896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1897         struct net_device *dev = info->user_ptr[1];
1898         struct wireless_dev *wdev = dev->ieee80211_ptr;
1899         const u8 *bssid;
1900
1901         if (!info->attrs[NL80211_ATTR_MAC])
1902                 return -EINVAL;
1903
1904         if (netif_running(dev))
1905                 return -EBUSY;
1906
1907         if (!rdev->ops->set_wds_peer)
1908                 return -EOPNOTSUPP;
1909
1910         if (wdev->iftype != NL80211_IFTYPE_WDS)
1911                 return -EOPNOTSUPP;
1912
1913         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1914         return rdev_set_wds_peer(rdev, dev, bssid);
1915 }
1916
1917
1918 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1919 {
1920         struct cfg80211_registered_device *rdev;
1921         struct net_device *netdev = NULL;
1922         struct wireless_dev *wdev;
1923         int result = 0, rem_txq_params = 0;
1924         struct nlattr *nl_txq_params;
1925         u32 changed;
1926         u8 retry_short = 0, retry_long = 0;
1927         u32 frag_threshold = 0, rts_threshold = 0;
1928         u8 coverage_class = 0;
1929
1930         ASSERT_RTNL();
1931
1932         /*
1933          * Try to find the wiphy and netdev. Normally this
1934          * function shouldn't need the netdev, but this is
1935          * done for backward compatibility -- previously
1936          * setting the channel was done per wiphy, but now
1937          * it is per netdev. Previous userland like hostapd
1938          * also passed a netdev to set_wiphy, so that it is
1939          * possible to let that go to the right netdev!
1940          */
1941
1942         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1943                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1944
1945                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1946                 if (netdev && netdev->ieee80211_ptr)
1947                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1948                 else
1949                         netdev = NULL;
1950         }
1951
1952         if (!netdev) {
1953                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1954                                                   info->attrs);
1955                 if (IS_ERR(rdev))
1956                         return PTR_ERR(rdev);
1957                 wdev = NULL;
1958                 netdev = NULL;
1959                 result = 0;
1960         } else
1961                 wdev = netdev->ieee80211_ptr;
1962
1963         /*
1964          * end workaround code, by now the rdev is available
1965          * and locked, and wdev may or may not be NULL.
1966          */
1967
1968         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1969                 result = cfg80211_dev_rename(
1970                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1971
1972         if (result)
1973                 goto bad_res;
1974
1975         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1976                 struct ieee80211_txq_params txq_params;
1977                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1978
1979                 if (!rdev->ops->set_txq_params) {
1980                         result = -EOPNOTSUPP;
1981                         goto bad_res;
1982                 }
1983
1984                 if (!netdev) {
1985                         result = -EINVAL;
1986                         goto bad_res;
1987                 }
1988
1989                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1990                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1991                         result = -EINVAL;
1992                         goto bad_res;
1993                 }
1994
1995                 if (!netif_running(netdev)) {
1996                         result = -ENETDOWN;
1997                         goto bad_res;
1998                 }
1999
2000                 nla_for_each_nested(nl_txq_params,
2001                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2002                                     rem_txq_params) {
2003                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2004                                   nla_data(nl_txq_params),
2005                                   nla_len(nl_txq_params),
2006                                   txq_params_policy);
2007                         result = parse_txq_params(tb, &txq_params);
2008                         if (result)
2009                                 goto bad_res;
2010
2011                         result = rdev_set_txq_params(rdev, netdev,
2012                                                      &txq_params);
2013                         if (result)
2014                                 goto bad_res;
2015                 }
2016         }
2017
2018         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2019                 result = __nl80211_set_channel(rdev,
2020                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
2021                                 info);
2022                 if (result)
2023                         goto bad_res;
2024         }
2025
2026         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2027                 struct wireless_dev *txp_wdev = wdev;
2028                 enum nl80211_tx_power_setting type;
2029                 int idx, mbm = 0;
2030
2031                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2032                         txp_wdev = NULL;
2033
2034                 if (!rdev->ops->set_tx_power) {
2035                         result = -EOPNOTSUPP;
2036                         goto bad_res;
2037                 }
2038
2039                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2040                 type = nla_get_u32(info->attrs[idx]);
2041
2042                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2043                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2044                         result = -EINVAL;
2045                         goto bad_res;
2046                 }
2047
2048                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2049                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2050                         mbm = nla_get_u32(info->attrs[idx]);
2051                 }
2052
2053                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2054                 if (result)
2055                         goto bad_res;
2056         }
2057
2058         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2059             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2060                 u32 tx_ant, rx_ant;
2061                 if ((!rdev->wiphy.available_antennas_tx &&
2062                      !rdev->wiphy.available_antennas_rx) ||
2063                     !rdev->ops->set_antenna) {
2064                         result = -EOPNOTSUPP;
2065                         goto bad_res;
2066                 }
2067
2068                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2069                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2070
2071                 /* reject antenna configurations which don't match the
2072                  * available antenna masks, except for the "all" mask */
2073                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2074                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2075                         result = -EINVAL;
2076                         goto bad_res;
2077                 }
2078
2079                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2080                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2081
2082                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2083                 if (result)
2084                         goto bad_res;
2085         }
2086
2087         changed = 0;
2088
2089         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2090                 retry_short = nla_get_u8(
2091                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2092                 if (retry_short == 0) {
2093                         result = -EINVAL;
2094                         goto bad_res;
2095                 }
2096                 changed |= WIPHY_PARAM_RETRY_SHORT;
2097         }
2098
2099         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2100                 retry_long = nla_get_u8(
2101                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2102                 if (retry_long == 0) {
2103                         result = -EINVAL;
2104                         goto bad_res;
2105                 }
2106                 changed |= WIPHY_PARAM_RETRY_LONG;
2107         }
2108
2109         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2110                 frag_threshold = nla_get_u32(
2111                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2112                 if (frag_threshold < 256) {
2113                         result = -EINVAL;
2114                         goto bad_res;
2115                 }
2116                 if (frag_threshold != (u32) -1) {
2117                         /*
2118                          * Fragments (apart from the last one) are required to
2119                          * have even length. Make the fragmentation code
2120                          * simpler by stripping LSB should someone try to use
2121                          * odd threshold value.
2122                          */
2123                         frag_threshold &= ~0x1;
2124                 }
2125                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2126         }
2127
2128         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2129                 rts_threshold = nla_get_u32(
2130                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2131                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2132         }
2133
2134         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2135                 coverage_class = nla_get_u8(
2136                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2137                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2138         }
2139
2140         if (changed) {
2141                 u8 old_retry_short, old_retry_long;
2142                 u32 old_frag_threshold, old_rts_threshold;
2143                 u8 old_coverage_class;
2144
2145                 if (!rdev->ops->set_wiphy_params) {
2146                         result = -EOPNOTSUPP;
2147                         goto bad_res;
2148                 }
2149
2150                 old_retry_short = rdev->wiphy.retry_short;
2151                 old_retry_long = rdev->wiphy.retry_long;
2152                 old_frag_threshold = rdev->wiphy.frag_threshold;
2153                 old_rts_threshold = rdev->wiphy.rts_threshold;
2154                 old_coverage_class = rdev->wiphy.coverage_class;
2155
2156                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2157                         rdev->wiphy.retry_short = retry_short;
2158                 if (changed & WIPHY_PARAM_RETRY_LONG)
2159                         rdev->wiphy.retry_long = retry_long;
2160                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2161                         rdev->wiphy.frag_threshold = frag_threshold;
2162                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2163                         rdev->wiphy.rts_threshold = rts_threshold;
2164                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2165                         rdev->wiphy.coverage_class = coverage_class;
2166
2167                 result = rdev_set_wiphy_params(rdev, changed);
2168                 if (result) {
2169                         rdev->wiphy.retry_short = old_retry_short;
2170                         rdev->wiphy.retry_long = old_retry_long;
2171                         rdev->wiphy.frag_threshold = old_frag_threshold;
2172                         rdev->wiphy.rts_threshold = old_rts_threshold;
2173                         rdev->wiphy.coverage_class = old_coverage_class;
2174                 }
2175         }
2176
2177  bad_res:
2178         if (netdev)
2179                 dev_put(netdev);
2180         return result;
2181 }
2182
2183 static inline u64 wdev_id(struct wireless_dev *wdev)
2184 {
2185         return (u64)wdev->identifier |
2186                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2187 }
2188
2189 static int nl80211_send_chandef(struct sk_buff *msg,
2190                                 const struct cfg80211_chan_def *chandef)
2191 {
2192         WARN_ON(!cfg80211_chandef_valid(chandef));
2193
2194         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2195                         chandef->chan->center_freq))
2196                 return -ENOBUFS;
2197         switch (chandef->width) {
2198         case NL80211_CHAN_WIDTH_20_NOHT:
2199         case NL80211_CHAN_WIDTH_20:
2200         case NL80211_CHAN_WIDTH_40:
2201                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2202                                 cfg80211_get_chandef_type(chandef)))
2203                         return -ENOBUFS;
2204                 break;
2205         default:
2206                 break;
2207         }
2208         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2209                 return -ENOBUFS;
2210         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2211                 return -ENOBUFS;
2212         if (chandef->center_freq2 &&
2213             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2214                 return -ENOBUFS;
2215         return 0;
2216 }
2217
2218 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2219                               struct cfg80211_registered_device *rdev,
2220                               struct wireless_dev *wdev)
2221 {
2222         struct net_device *dev = wdev->netdev;
2223         void *hdr;
2224
2225         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2226         if (!hdr)
2227                 return -1;
2228
2229         if (dev &&
2230             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2231              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2232                 goto nla_put_failure;
2233
2234         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2235             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2236             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2237             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2238             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2239                         rdev->devlist_generation ^
2240                         (cfg80211_rdev_list_generation << 2)))
2241                 goto nla_put_failure;
2242
2243         if (rdev->ops->get_channel) {
2244                 int ret;
2245                 struct cfg80211_chan_def chandef;
2246
2247                 ret = rdev_get_channel(rdev, wdev, &chandef);
2248                 if (ret == 0) {
2249                         if (nl80211_send_chandef(msg, &chandef))
2250                                 goto nla_put_failure;
2251                 }
2252         }
2253
2254         if (wdev->ssid_len) {
2255                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2256                         goto nla_put_failure;
2257         }
2258
2259         return genlmsg_end(msg, hdr);
2260
2261  nla_put_failure:
2262         genlmsg_cancel(msg, hdr);
2263         return -EMSGSIZE;
2264 }
2265
2266 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2267 {
2268         int wp_idx = 0;
2269         int if_idx = 0;
2270         int wp_start = cb->args[0];
2271         int if_start = cb->args[1];
2272         struct cfg80211_registered_device *rdev;
2273         struct wireless_dev *wdev;
2274
2275         rtnl_lock();
2276         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2277                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2278                         continue;
2279                 if (wp_idx < wp_start) {
2280                         wp_idx++;
2281                         continue;
2282                 }
2283                 if_idx = 0;
2284
2285                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2286                         if (if_idx < if_start) {
2287                                 if_idx++;
2288                                 continue;
2289                         }
2290                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2291                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2292                                                rdev, wdev) < 0) {
2293                                 goto out;
2294                         }
2295                         if_idx++;
2296                 }
2297
2298                 wp_idx++;
2299         }
2300  out:
2301         rtnl_unlock();
2302
2303         cb->args[0] = wp_idx;
2304         cb->args[1] = if_idx;
2305
2306         return skb->len;
2307 }
2308
2309 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2310 {
2311         struct sk_buff *msg;
2312         struct cfg80211_registered_device *dev = info->user_ptr[0];
2313         struct wireless_dev *wdev = info->user_ptr[1];
2314
2315         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2316         if (!msg)
2317                 return -ENOMEM;
2318
2319         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2320                                dev, wdev) < 0) {
2321                 nlmsg_free(msg);
2322                 return -ENOBUFS;
2323         }
2324
2325         return genlmsg_reply(msg, info);
2326 }
2327
2328 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2329         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2330         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2331         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2332         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2333         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2334         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2335 };
2336
2337 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2338 {
2339         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2340         int flag;
2341
2342         *mntrflags = 0;
2343
2344         if (!nla)
2345                 return -EINVAL;
2346
2347         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2348                              nla, mntr_flags_policy))
2349                 return -EINVAL;
2350
2351         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2352                 if (flags[flag])
2353                         *mntrflags |= (1<<flag);
2354
2355         return 0;
2356 }
2357
2358 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2359                                struct net_device *netdev, u8 use_4addr,
2360                                enum nl80211_iftype iftype)
2361 {
2362         if (!use_4addr) {
2363                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2364                         return -EBUSY;
2365                 return 0;
2366         }
2367
2368         switch (iftype) {
2369         case NL80211_IFTYPE_AP_VLAN:
2370                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2371                         return 0;
2372                 break;
2373         case NL80211_IFTYPE_STATION:
2374                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2375                         return 0;
2376                 break;
2377         default:
2378                 break;
2379         }
2380
2381         return -EOPNOTSUPP;
2382 }
2383
2384 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2385 {
2386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2387         struct vif_params params;
2388         int err;
2389         enum nl80211_iftype otype, ntype;
2390         struct net_device *dev = info->user_ptr[1];
2391         u32 _flags, *flags = NULL;
2392         bool change = false;
2393
2394         memset(&params, 0, sizeof(params));
2395
2396         otype = ntype = dev->ieee80211_ptr->iftype;
2397
2398         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2399                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2400                 if (otype != ntype)
2401                         change = true;
2402                 if (ntype > NL80211_IFTYPE_MAX)
2403                         return -EINVAL;
2404         }
2405
2406         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2407                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2408
2409                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2410                         return -EINVAL;
2411                 if (netif_running(dev))
2412                         return -EBUSY;
2413
2414                 wdev_lock(wdev);
2415                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2416                              IEEE80211_MAX_MESH_ID_LEN);
2417                 wdev->mesh_id_up_len =
2418                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2419                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2420                        wdev->mesh_id_up_len);
2421                 wdev_unlock(wdev);
2422         }
2423
2424         if (info->attrs[NL80211_ATTR_4ADDR]) {
2425                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2426                 change = true;
2427                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2428                 if (err)
2429                         return err;
2430         } else {
2431                 params.use_4addr = -1;
2432         }
2433
2434         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2435                 if (ntype != NL80211_IFTYPE_MONITOR)
2436                         return -EINVAL;
2437                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2438                                           &_flags);
2439                 if (err)
2440                         return err;
2441
2442                 flags = &_flags;
2443                 change = true;
2444         }
2445
2446         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2447             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2448                 return -EOPNOTSUPP;
2449
2450         if (change)
2451                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2452         else
2453                 err = 0;
2454
2455         if (!err && params.use_4addr != -1)
2456                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2457
2458         return err;
2459 }
2460
2461 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2462 {
2463         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2464         struct vif_params params;
2465         struct wireless_dev *wdev;
2466         struct sk_buff *msg;
2467         int err;
2468         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2469         u32 flags;
2470
2471         memset(&params, 0, sizeof(params));
2472
2473         if (!info->attrs[NL80211_ATTR_IFNAME])
2474                 return -EINVAL;
2475
2476         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2477                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2478                 if (type > NL80211_IFTYPE_MAX)
2479                         return -EINVAL;
2480         }
2481
2482         if (!rdev->ops->add_virtual_intf ||
2483             !(rdev->wiphy.interface_modes & (1 << type)))
2484                 return -EOPNOTSUPP;
2485
2486         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2487                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2488                            ETH_ALEN);
2489                 if (!is_valid_ether_addr(params.macaddr))
2490                         return -EADDRNOTAVAIL;
2491         }
2492
2493         if (info->attrs[NL80211_ATTR_4ADDR]) {
2494                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2495                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2496                 if (err)
2497                         return err;
2498         }
2499
2500         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2501         if (!msg)
2502                 return -ENOMEM;
2503
2504         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2505                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2506                                   &flags);
2507
2508         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2509             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2510                 return -EOPNOTSUPP;
2511
2512         wdev = rdev_add_virtual_intf(rdev,
2513                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2514                                 type, err ? NULL : &flags, &params);
2515         if (IS_ERR(wdev)) {
2516                 nlmsg_free(msg);
2517                 return PTR_ERR(wdev);
2518         }
2519
2520         switch (type) {
2521         case NL80211_IFTYPE_MESH_POINT:
2522                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2523                         break;
2524                 wdev_lock(wdev);
2525                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2526                              IEEE80211_MAX_MESH_ID_LEN);
2527                 wdev->mesh_id_up_len =
2528                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2529                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2530                        wdev->mesh_id_up_len);
2531                 wdev_unlock(wdev);
2532                 break;
2533         case NL80211_IFTYPE_P2P_DEVICE:
2534                 /*
2535                  * P2P Device doesn't have a netdev, so doesn't go
2536                  * through the netdev notifier and must be added here
2537                  */
2538                 mutex_init(&wdev->mtx);
2539                 INIT_LIST_HEAD(&wdev->event_list);
2540                 spin_lock_init(&wdev->event_lock);
2541                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2542                 spin_lock_init(&wdev->mgmt_registrations_lock);
2543
2544                 wdev->identifier = ++rdev->wdev_id;
2545                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2546                 rdev->devlist_generation++;
2547                 break;
2548         default:
2549                 break;
2550         }
2551
2552         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2553                                rdev, wdev) < 0) {
2554                 nlmsg_free(msg);
2555                 return -ENOBUFS;
2556         }
2557
2558         return genlmsg_reply(msg, info);
2559 }
2560
2561 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2562 {
2563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2564         struct wireless_dev *wdev = info->user_ptr[1];
2565
2566         if (!rdev->ops->del_virtual_intf)
2567                 return -EOPNOTSUPP;
2568
2569         /*
2570          * If we remove a wireless device without a netdev then clear
2571          * user_ptr[1] so that nl80211_post_doit won't dereference it
2572          * to check if it needs to do dev_put(). Otherwise it crashes
2573          * since the wdev has been freed, unlike with a netdev where
2574          * we need the dev_put() for the netdev to really be freed.
2575          */
2576         if (!wdev->netdev)
2577                 info->user_ptr[1] = NULL;
2578
2579         return rdev_del_virtual_intf(rdev, wdev);
2580 }
2581
2582 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2583 {
2584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2585         struct net_device *dev = info->user_ptr[1];
2586         u16 noack_map;
2587
2588         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2589                 return -EINVAL;
2590
2591         if (!rdev->ops->set_noack_map)
2592                 return -EOPNOTSUPP;
2593
2594         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2595
2596         return rdev_set_noack_map(rdev, dev, noack_map);
2597 }
2598
2599 struct get_key_cookie {
2600         struct sk_buff *msg;
2601         int error;
2602         int idx;
2603 };
2604
2605 static void get_key_callback(void *c, struct key_params *params)
2606 {
2607         struct nlattr *key;
2608         struct get_key_cookie *cookie = c;
2609
2610         if ((params->key &&
2611              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2612                      params->key_len, params->key)) ||
2613             (params->seq &&
2614              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2615                      params->seq_len, params->seq)) ||
2616             (params->cipher &&
2617              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2618                          params->cipher)))
2619                 goto nla_put_failure;
2620
2621         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2622         if (!key)
2623                 goto nla_put_failure;
2624
2625         if ((params->key &&
2626              nla_put(cookie->msg, NL80211_KEY_DATA,
2627                      params->key_len, params->key)) ||
2628             (params->seq &&
2629              nla_put(cookie->msg, NL80211_KEY_SEQ,
2630                      params->seq_len, params->seq)) ||
2631             (params->cipher &&
2632              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2633                          params->cipher)))
2634                 goto nla_put_failure;
2635
2636         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2637                 goto nla_put_failure;
2638
2639         nla_nest_end(cookie->msg, key);
2640
2641         return;
2642  nla_put_failure:
2643         cookie->error = 1;
2644 }
2645
2646 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2647 {
2648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2649         int err;
2650         struct net_device *dev = info->user_ptr[1];
2651         u8 key_idx = 0;
2652         const u8 *mac_addr = NULL;
2653         bool pairwise;
2654         struct get_key_cookie cookie = {
2655                 .error = 0,
2656         };
2657         void *hdr;
2658         struct sk_buff *msg;
2659
2660         if (info->attrs[NL80211_ATTR_KEY_IDX])
2661                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2662
2663         if (key_idx > 5)
2664                 return -EINVAL;
2665
2666         if (info->attrs[NL80211_ATTR_MAC])
2667                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2668
2669         pairwise = !!mac_addr;
2670         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2671                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2672                 if (kt >= NUM_NL80211_KEYTYPES)
2673                         return -EINVAL;
2674                 if (kt != NL80211_KEYTYPE_GROUP &&
2675                     kt != NL80211_KEYTYPE_PAIRWISE)
2676                         return -EINVAL;
2677                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2678         }
2679
2680         if (!rdev->ops->get_key)
2681                 return -EOPNOTSUPP;
2682
2683         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2684         if (!msg)
2685                 return -ENOMEM;
2686
2687         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2688                              NL80211_CMD_NEW_KEY);
2689         if (!hdr)
2690                 return -ENOBUFS;
2691
2692         cookie.msg = msg;
2693         cookie.idx = key_idx;
2694
2695         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2696             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2697                 goto nla_put_failure;
2698         if (mac_addr &&
2699             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2700                 goto nla_put_failure;
2701
2702         if (pairwise && mac_addr &&
2703             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2704                 return -ENOENT;
2705
2706         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2707                            get_key_callback);
2708
2709         if (err)
2710                 goto free_msg;
2711
2712         if (cookie.error)
2713                 goto nla_put_failure;
2714
2715         genlmsg_end(msg, hdr);
2716         return genlmsg_reply(msg, info);
2717
2718  nla_put_failure:
2719         err = -ENOBUFS;
2720  free_msg:
2721         nlmsg_free(msg);
2722         return err;
2723 }
2724
2725 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2726 {
2727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2728         struct key_parse key;
2729         int err;
2730         struct net_device *dev = info->user_ptr[1];
2731
2732         err = nl80211_parse_key(info, &key);
2733         if (err)
2734                 return err;
2735
2736         if (key.idx < 0)
2737                 return -EINVAL;
2738
2739         /* only support setting default key */
2740         if (!key.def && !key.defmgmt)
2741                 return -EINVAL;
2742
2743         wdev_lock(dev->ieee80211_ptr);
2744
2745         if (key.def) {
2746                 if (!rdev->ops->set_default_key) {
2747                         err = -EOPNOTSUPP;
2748                         goto out;
2749                 }
2750
2751                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2752                 if (err)
2753                         goto out;
2754
2755                 err = rdev_set_default_key(rdev, dev, key.idx,
2756                                                  key.def_uni, key.def_multi);
2757
2758                 if (err)
2759                         goto out;
2760
2761 #ifdef CONFIG_CFG80211_WEXT
2762                 dev->ieee80211_ptr->wext.default_key = key.idx;
2763 #endif
2764         } else {
2765                 if (key.def_uni || !key.def_multi) {
2766                         err = -EINVAL;
2767                         goto out;
2768                 }
2769
2770                 if (!rdev->ops->set_default_mgmt_key) {
2771                         err = -EOPNOTSUPP;
2772                         goto out;
2773                 }
2774
2775                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2776                 if (err)
2777                         goto out;
2778
2779                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2780                 if (err)
2781                         goto out;
2782
2783 #ifdef CONFIG_CFG80211_WEXT
2784                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2785 #endif
2786         }
2787
2788  out:
2789         wdev_unlock(dev->ieee80211_ptr);
2790
2791         return err;
2792 }
2793
2794 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2795 {
2796         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2797         int err;
2798         struct net_device *dev = info->user_ptr[1];
2799         struct key_parse key;
2800         const u8 *mac_addr = NULL;
2801
2802         err = nl80211_parse_key(info, &key);
2803         if (err)
2804                 return err;
2805
2806         if (!key.p.key)
2807                 return -EINVAL;
2808
2809         if (info->attrs[NL80211_ATTR_MAC])
2810                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2811
2812         if (key.type == -1) {
2813                 if (mac_addr)
2814                         key.type = NL80211_KEYTYPE_PAIRWISE;
2815                 else
2816                         key.type = NL80211_KEYTYPE_GROUP;
2817         }
2818
2819         /* for now */
2820         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2821             key.type != NL80211_KEYTYPE_GROUP)
2822                 return -EINVAL;
2823
2824         if (!rdev->ops->add_key)
2825                 return -EOPNOTSUPP;
2826
2827         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2828                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2829                                            mac_addr))
2830                 return -EINVAL;
2831
2832         wdev_lock(dev->ieee80211_ptr);
2833         err = nl80211_key_allowed(dev->ieee80211_ptr);
2834         if (!err)
2835                 err = rdev_add_key(rdev, dev, key.idx,
2836                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2837                                     mac_addr, &key.p);
2838         wdev_unlock(dev->ieee80211_ptr);
2839
2840         return err;
2841 }
2842
2843 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2844 {
2845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2846         int err;
2847         struct net_device *dev = info->user_ptr[1];
2848         u8 *mac_addr = NULL;
2849         struct key_parse key;
2850
2851         err = nl80211_parse_key(info, &key);
2852         if (err)
2853                 return err;
2854
2855         if (info->attrs[NL80211_ATTR_MAC])
2856                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2857
2858         if (key.type == -1) {
2859                 if (mac_addr)
2860                         key.type = NL80211_KEYTYPE_PAIRWISE;
2861                 else
2862                         key.type = NL80211_KEYTYPE_GROUP;
2863         }
2864
2865         /* for now */
2866         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2867             key.type != NL80211_KEYTYPE_GROUP)
2868                 return -EINVAL;
2869
2870         if (!rdev->ops->del_key)
2871                 return -EOPNOTSUPP;
2872
2873         wdev_lock(dev->ieee80211_ptr);
2874         err = nl80211_key_allowed(dev->ieee80211_ptr);
2875
2876         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2877             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2878                 err = -ENOENT;
2879
2880         if (!err)
2881                 err = rdev_del_key(rdev, dev, key.idx,
2882                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2883                                    mac_addr);
2884
2885 #ifdef CONFIG_CFG80211_WEXT
2886         if (!err) {
2887                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2888                         dev->ieee80211_ptr->wext.default_key = -1;
2889                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2890                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2891         }
2892 #endif
2893         wdev_unlock(dev->ieee80211_ptr);
2894
2895         return err;
2896 }
2897
2898 /* This function returns an error or the number of nested attributes */
2899 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2900 {
2901         struct nlattr *attr;
2902         int n_entries = 0, tmp;
2903
2904         nla_for_each_nested(attr, nl_attr, tmp) {
2905                 if (nla_len(attr) != ETH_ALEN)
2906                         return -EINVAL;
2907
2908                 n_entries++;
2909         }
2910
2911         return n_entries;
2912 }
2913
2914 /*
2915  * This function parses ACL information and allocates memory for ACL data.
2916  * On successful return, the calling function is responsible to free the
2917  * ACL buffer returned by this function.
2918  */
2919 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2920                                                 struct genl_info *info)
2921 {
2922         enum nl80211_acl_policy acl_policy;
2923         struct nlattr *attr;
2924         struct cfg80211_acl_data *acl;
2925         int i = 0, n_entries, tmp;
2926
2927         if (!wiphy->max_acl_mac_addrs)
2928                 return ERR_PTR(-EOPNOTSUPP);
2929
2930         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2931                 return ERR_PTR(-EINVAL);
2932
2933         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2934         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2935             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2936                 return ERR_PTR(-EINVAL);
2937
2938         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2939                 return ERR_PTR(-EINVAL);
2940
2941         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2942         if (n_entries < 0)
2943                 return ERR_PTR(n_entries);
2944
2945         if (n_entries > wiphy->max_acl_mac_addrs)
2946                 return ERR_PTR(-ENOTSUPP);
2947
2948         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2949                       GFP_KERNEL);
2950         if (!acl)
2951                 return ERR_PTR(-ENOMEM);
2952
2953         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2954                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2955                 i++;
2956         }
2957
2958         acl->n_acl_entries = n_entries;
2959         acl->acl_policy = acl_policy;
2960
2961         return acl;
2962 }
2963
2964 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2965 {
2966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2967         struct net_device *dev = info->user_ptr[1];
2968         struct cfg80211_acl_data *acl;
2969         int err;
2970
2971         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2973                 return -EOPNOTSUPP;
2974
2975         if (!dev->ieee80211_ptr->beacon_interval)
2976                 return -EINVAL;
2977
2978         acl = parse_acl_data(&rdev->wiphy, info);
2979         if (IS_ERR(acl))
2980                 return PTR_ERR(acl);
2981
2982         err = rdev_set_mac_acl(rdev, dev, acl);
2983
2984         kfree(acl);
2985
2986         return err;
2987 }
2988
2989 static int nl80211_parse_beacon(struct nlattr *attrs[],
2990                                 struct cfg80211_beacon_data *bcn)
2991 {
2992         bool haveinfo = false;
2993
2994         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2995             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2996             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2997             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2998                 return -EINVAL;
2999
3000         memset(bcn, 0, sizeof(*bcn));
3001
3002         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3003                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3004                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3005                 if (!bcn->head_len)
3006                         return -EINVAL;
3007                 haveinfo = true;
3008         }
3009
3010         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3011                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3012                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3013                 haveinfo = true;
3014         }
3015
3016         if (!haveinfo)
3017                 return -EINVAL;
3018
3019         if (attrs[NL80211_ATTR_IE]) {
3020                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3021                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3022         }
3023
3024         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3025                 bcn->proberesp_ies =
3026                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3027                 bcn->proberesp_ies_len =
3028                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3029         }
3030
3031         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3032                 bcn->assocresp_ies =
3033                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3034                 bcn->assocresp_ies_len =
3035                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3036         }
3037
3038         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3039                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3040                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3041         }
3042
3043         return 0;
3044 }
3045
3046 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3047                                    struct cfg80211_ap_settings *params)
3048 {
3049         struct wireless_dev *wdev;
3050         bool ret = false;
3051
3052         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3053                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3054                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3055                         continue;
3056
3057                 if (!wdev->preset_chandef.chan)
3058                         continue;
3059
3060                 params->chandef = wdev->preset_chandef;
3061                 ret = true;
3062                 break;
3063         }
3064
3065         return ret;
3066 }
3067
3068 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3069                                     enum nl80211_auth_type auth_type,
3070                                     enum nl80211_commands cmd)
3071 {
3072         if (auth_type > NL80211_AUTHTYPE_MAX)
3073                 return false;
3074
3075         switch (cmd) {
3076         case NL80211_CMD_AUTHENTICATE:
3077                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3078                     auth_type == NL80211_AUTHTYPE_SAE)
3079                         return false;
3080                 return true;
3081         case NL80211_CMD_CONNECT:
3082         case NL80211_CMD_START_AP:
3083                 /* SAE not supported yet */
3084                 if (auth_type == NL80211_AUTHTYPE_SAE)
3085                         return false;
3086                 return true;
3087         default:
3088                 return false;
3089         }
3090 }
3091
3092 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3093 {
3094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3095         struct net_device *dev = info->user_ptr[1];
3096         struct wireless_dev *wdev = dev->ieee80211_ptr;
3097         struct cfg80211_ap_settings params;
3098         int err;
3099         u8 radar_detect_width = 0;
3100
3101         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3102             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3103                 return -EOPNOTSUPP;
3104
3105         if (!rdev->ops->start_ap)
3106                 return -EOPNOTSUPP;
3107
3108         if (wdev->beacon_interval)
3109                 return -EALREADY;
3110
3111         memset(&params, 0, sizeof(params));
3112
3113         /* these are required for START_AP */
3114         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3115             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3116             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3117                 return -EINVAL;
3118
3119         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3120         if (err)
3121                 return err;
3122
3123         params.beacon_interval =
3124                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3125         params.dtim_period =
3126                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3127
3128         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3129         if (err)
3130                 return err;
3131
3132         /*
3133          * In theory, some of these attributes should be required here
3134          * but since they were not used when the command was originally
3135          * added, keep them optional for old user space programs to let
3136          * them continue to work with drivers that do not need the
3137          * additional information -- drivers must check!
3138          */
3139         if (info->attrs[NL80211_ATTR_SSID]) {
3140                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3141                 params.ssid_len =
3142                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3143                 if (params.ssid_len == 0 ||
3144                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3145                         return -EINVAL;
3146         }
3147
3148         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3149                 params.hidden_ssid = nla_get_u32(
3150                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3151                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3152                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3153                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3154                         return -EINVAL;
3155         }
3156
3157         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3158
3159         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3160                 params.auth_type = nla_get_u32(
3161                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3162                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3163                                              NL80211_CMD_START_AP))
3164                         return -EINVAL;
3165         } else
3166                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3167
3168         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3169                                       NL80211_MAX_NR_CIPHER_SUITES);
3170         if (err)
3171                 return err;
3172
3173         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3174                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3175                         return -EOPNOTSUPP;
3176                 params.inactivity_timeout = nla_get_u16(
3177                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3178         }
3179
3180         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3181                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3182                         return -EINVAL;
3183                 params.p2p_ctwindow =
3184                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3185                 if (params.p2p_ctwindow > 127)
3186                         return -EINVAL;
3187                 if (params.p2p_ctwindow != 0 &&
3188                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3189                         return -EINVAL;
3190         }
3191
3192         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3193                 u8 tmp;
3194
3195                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3196                         return -EINVAL;
3197                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3198                 if (tmp > 1)
3199                         return -EINVAL;
3200                 params.p2p_opp_ps = tmp;
3201                 if (params.p2p_opp_ps != 0 &&
3202                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3203                         return -EINVAL;
3204         }
3205
3206         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3207                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3208                 if (err)
3209                         return err;
3210         } else if (wdev->preset_chandef.chan) {
3211                 params.chandef = wdev->preset_chandef;
3212         } else if (!nl80211_get_ap_channel(rdev, &params))
3213                 return -EINVAL;
3214
3215         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3216                 return -EINVAL;
3217
3218         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3219         if (err < 0)
3220                 return err;
3221         if (err) {
3222                 radar_detect_width = BIT(params.chandef.width);
3223                 params.radar_required = true;
3224         }
3225
3226         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3227                                            params.chandef.chan,
3228                                            CHAN_MODE_SHARED,
3229                                            radar_detect_width);
3230         if (err)
3231                 return err;
3232
3233         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3234                 params.acl = parse_acl_data(&rdev->wiphy, info);
3235                 if (IS_ERR(params.acl))
3236                         return PTR_ERR(params.acl);
3237         }
3238
3239         wdev_lock(wdev);
3240         err = rdev_start_ap(rdev, dev, &params);
3241         if (!err) {
3242                 wdev->preset_chandef = params.chandef;
3243                 wdev->beacon_interval = params.beacon_interval;
3244                 wdev->channel = params.chandef.chan;
3245                 wdev->ssid_len = params.ssid_len;
3246                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3247         }
3248         wdev_unlock(wdev);
3249
3250         kfree(params.acl);
3251
3252         return err;
3253 }
3254
3255 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3256 {
3257         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3258         struct net_device *dev = info->user_ptr[1];
3259         struct wireless_dev *wdev = dev->ieee80211_ptr;
3260         struct cfg80211_beacon_data params;
3261         int err;
3262
3263         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3264             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3265                 return -EOPNOTSUPP;
3266
3267         if (!rdev->ops->change_beacon)
3268                 return -EOPNOTSUPP;
3269
3270         if (!wdev->beacon_interval)
3271                 return -EINVAL;
3272
3273         err = nl80211_parse_beacon(info->attrs, &params);
3274         if (err)
3275                 return err;
3276
3277         wdev_lock(wdev);
3278         err = rdev_change_beacon(rdev, dev, &params);
3279         wdev_unlock(wdev);
3280
3281         return err;
3282 }
3283
3284 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3285 {
3286         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3287         struct net_device *dev = info->user_ptr[1];
3288
3289         return cfg80211_stop_ap(rdev, dev);
3290 }
3291
3292 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3293         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3294         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3295         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3296         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3297         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3298         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3299 };
3300
3301 static int parse_station_flags(struct genl_info *info,
3302                                enum nl80211_iftype iftype,
3303                                struct station_parameters *params)
3304 {
3305         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3306         struct nlattr *nla;
3307         int flag;
3308
3309         /*
3310          * Try parsing the new attribute first so userspace
3311          * can specify both for older kernels.
3312          */
3313         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3314         if (nla) {
3315                 struct nl80211_sta_flag_update *sta_flags;
3316
3317                 sta_flags = nla_data(nla);
3318                 params->sta_flags_mask = sta_flags->mask;
3319                 params->sta_flags_set = sta_flags->set;
3320                 params->sta_flags_set &= params->sta_flags_mask;
3321                 if ((params->sta_flags_mask |
3322                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3323                         return -EINVAL;
3324                 return 0;
3325         }
3326
3327         /* if present, parse the old attribute */
3328
3329         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3330         if (!nla)
3331                 return 0;
3332
3333         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3334                              nla, sta_flags_policy))
3335                 return -EINVAL;
3336
3337         /*
3338          * Only allow certain flags for interface types so that
3339          * other attributes are silently ignored. Remember that
3340          * this is backward compatibility code with old userspace
3341          * and shouldn't be hit in other cases anyway.
3342          */
3343         switch (iftype) {
3344         case NL80211_IFTYPE_AP:
3345         case NL80211_IFTYPE_AP_VLAN:
3346         case NL80211_IFTYPE_P2P_GO:
3347                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3348                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3349                                          BIT(NL80211_STA_FLAG_WME) |
3350                                          BIT(NL80211_STA_FLAG_MFP);
3351                 break;
3352         case NL80211_IFTYPE_P2P_CLIENT:
3353         case NL80211_IFTYPE_STATION:
3354                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3355                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3356                 break;
3357         case NL80211_IFTYPE_MESH_POINT:
3358                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3359                                          BIT(NL80211_STA_FLAG_MFP) |
3360                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3361         default:
3362                 return -EINVAL;
3363         }
3364
3365         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3366                 if (flags[flag]) {
3367                         params->sta_flags_set |= (1<<flag);
3368
3369                         /* no longer support new API additions in old API */
3370                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3371                                 return -EINVAL;
3372                 }
3373         }
3374
3375         return 0;
3376 }
3377
3378 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3379                                  int attr)
3380 {
3381         struct nlattr *rate;
3382         u32 bitrate;
3383         u16 bitrate_compat;
3384
3385         rate = nla_nest_start(msg, attr);
3386         if (!rate)
3387                 return false;
3388
3389         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3390         bitrate = cfg80211_calculate_bitrate(info);
3391         /* report 16-bit bitrate only if we can */
3392         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3393         if (bitrate > 0 &&
3394             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3395                 return false;
3396         if (bitrate_compat > 0 &&
3397             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3398                 return false;
3399
3400         if (info->flags & RATE_INFO_FLAGS_MCS) {
3401                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3402                         return false;
3403                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3404                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3405                         return false;
3406                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3407                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3408                         return false;
3409         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3410                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3411                         return false;
3412                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3413                         return false;
3414                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3415                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3416                         return false;
3417                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3418                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3419                         return false;
3420                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3421                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3422                         return false;
3423                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3424                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3425                         return false;
3426                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3427                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3428                         return false;
3429         }
3430
3431         nla_nest_end(msg, rate);
3432         return true;
3433 }
3434
3435 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3436                                int id)
3437 {
3438         void *attr;
3439         int i = 0;
3440
3441         if (!mask)
3442                 return true;
3443
3444         attr = nla_nest_start(msg, id);
3445         if (!attr)
3446                 return false;
3447
3448         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3449                 if (!(mask & BIT(i)))
3450                         continue;
3451
3452                 if (nla_put_u8(msg, i, signal[i]))
3453                         return false;
3454         }
3455
3456         nla_nest_end(msg, attr);
3457
3458         return true;
3459 }
3460
3461 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3462                                 int flags,
3463                                 struct cfg80211_registered_device *rdev,
3464                                 struct net_device *dev,
3465                                 const u8 *mac_addr, struct station_info *sinfo)
3466 {
3467         void *hdr;
3468         struct nlattr *sinfoattr, *bss_param;
3469
3470         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3471         if (!hdr)
3472                 return -1;
3473
3474         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3475             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3476             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3477                 goto nla_put_failure;
3478
3479         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3480         if (!sinfoattr)
3481                 goto nla_put_failure;
3482         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3483             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3484                         sinfo->connected_time))
3485                 goto nla_put_failure;
3486         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3487             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3488                         sinfo->inactive_time))
3489                 goto nla_put_failure;
3490         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3491                               STATION_INFO_RX_BYTES64)) &&
3492             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3493                         (u32)sinfo->rx_bytes))
3494                 goto nla_put_failure;
3495         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3496                               STATION_INFO_TX_BYTES64)) &&
3497             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3498                         (u32)sinfo->tx_bytes))
3499                 goto nla_put_failure;
3500         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3501             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3502                         sinfo->rx_bytes))
3503                 goto nla_put_failure;
3504         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3505             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3506                         sinfo->tx_bytes))
3507                 goto nla_put_failure;
3508         if ((sinfo->filled & STATION_INFO_LLID) &&
3509             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3510                 goto nla_put_failure;
3511         if ((sinfo->filled & STATION_INFO_PLID) &&
3512             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3513                 goto nla_put_failure;
3514         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3515             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3516                        sinfo->plink_state))
3517                 goto nla_put_failure;
3518         switch (rdev->wiphy.signal_type) {
3519         case CFG80211_SIGNAL_TYPE_MBM:
3520                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3521                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3522                                sinfo->signal))
3523                         goto nla_put_failure;
3524                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3525                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3526                                sinfo->signal_avg))
3527                         goto nla_put_failure;
3528                 break;
3529         default:
3530                 break;
3531         }
3532         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3533                 if (!nl80211_put_signal(msg, sinfo->chains,
3534                                         sinfo->chain_signal,
3535                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3536                         goto nla_put_failure;
3537         }
3538         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3539                 if (!nl80211_put_signal(msg, sinfo->chains,
3540                                         sinfo->chain_signal_avg,
3541                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3542                         goto nla_put_failure;
3543         }
3544         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3545                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3546                                           NL80211_STA_INFO_TX_BITRATE))
3547                         goto nla_put_failure;
3548         }
3549         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3550                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3551                                           NL80211_STA_INFO_RX_BITRATE))
3552                         goto nla_put_failure;
3553         }
3554         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3555             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3556                         sinfo->rx_packets))
3557                 goto nla_put_failure;
3558         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3559             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3560                         sinfo->tx_packets))
3561                 goto nla_put_failure;
3562         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3563             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3564                         sinfo->tx_retries))
3565                 goto nla_put_failure;
3566         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3567             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3568                         sinfo->tx_failed))
3569                 goto nla_put_failure;
3570         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3571             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3572                         sinfo->beacon_loss_count))
3573                 goto nla_put_failure;
3574         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3575             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3576                         sinfo->local_pm))
3577                 goto nla_put_failure;
3578         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3579             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3580                         sinfo->peer_pm))
3581                 goto nla_put_failure;
3582         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3583             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3584                         sinfo->nonpeer_pm))
3585                 goto nla_put_failure;
3586         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3587                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3588                 if (!bss_param)
3589                         goto nla_put_failure;
3590
3591                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3592                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3593                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3594                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3595                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3596                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3597                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3598                                sinfo->bss_param.dtim_period) ||
3599                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3600                                 sinfo->bss_param.beacon_interval))
3601                         goto nla_put_failure;
3602
3603                 nla_nest_end(msg, bss_param);
3604         }
3605         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3606             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3607                     sizeof(struct nl80211_sta_flag_update),
3608                     &sinfo->sta_flags))
3609                 goto nla_put_failure;
3610         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3611                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3612                             sinfo->t_offset))
3613                 goto nla_put_failure;
3614         nla_nest_end(msg, sinfoattr);
3615
3616         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3617             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3618                     sinfo->assoc_req_ies))
3619                 goto nla_put_failure;
3620
3621         return genlmsg_end(msg, hdr);
3622
3623  nla_put_failure:
3624         genlmsg_cancel(msg, hdr);
3625         return -EMSGSIZE;
3626 }
3627
3628 static int nl80211_dump_station(struct sk_buff *skb,
3629                                 struct netlink_callback *cb)
3630 {
3631         struct station_info sinfo;
3632         struct cfg80211_registered_device *dev;
3633         struct wireless_dev *wdev;
3634         u8 mac_addr[ETH_ALEN];
3635         int sta_idx = cb->args[2];
3636         int err;
3637
3638         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3639         if (err)
3640                 return err;
3641
3642         if (!wdev->netdev) {
3643                 err = -EINVAL;
3644                 goto out_err;
3645         }
3646
3647         if (!dev->ops->dump_station) {
3648                 err = -EOPNOTSUPP;
3649                 goto out_err;
3650         }
3651
3652         while (1) {
3653                 memset(&sinfo, 0, sizeof(sinfo));
3654                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3655                                         mac_addr, &sinfo);
3656                 if (err == -ENOENT)
3657                         break;
3658                 if (err)
3659                         goto out_err;
3660
3661                 if (nl80211_send_station(skb,
3662                                 NETLINK_CB(cb->skb).portid,
3663                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3664                                 dev, wdev->netdev, mac_addr,
3665                                 &sinfo) < 0)
3666                         goto out;
3667
3668                 sta_idx++;
3669         }
3670
3671
3672  out:
3673         cb->args[2] = sta_idx;
3674         err = skb->len;
3675  out_err:
3676         nl80211_finish_wdev_dump(dev);
3677
3678         return err;
3679 }
3680
3681 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3682 {
3683         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3684         struct net_device *dev = info->user_ptr[1];
3685         struct station_info sinfo;
3686         struct sk_buff *msg;
3687         u8 *mac_addr = NULL;
3688         int err;
3689
3690         memset(&sinfo, 0, sizeof(sinfo));
3691
3692         if (!info->attrs[NL80211_ATTR_MAC])
3693                 return -EINVAL;
3694
3695         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3696
3697         if (!rdev->ops->get_station)
3698                 return -EOPNOTSUPP;
3699
3700         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3701         if (err)
3702                 return err;
3703
3704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3705         if (!msg)
3706                 return -ENOMEM;
3707
3708         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3709                                  rdev, dev, mac_addr, &sinfo) < 0) {
3710                 nlmsg_free(msg);
3711                 return -ENOBUFS;
3712         }
3713
3714         return genlmsg_reply(msg, info);
3715 }
3716
3717 int cfg80211_check_station_change(struct wiphy *wiphy,
3718                                   struct station_parameters *params,
3719                                   enum cfg80211_station_type statype)
3720 {
3721         if (params->listen_interval != -1)
3722                 return -EINVAL;
3723         if (params->aid)
3724                 return -EINVAL;
3725
3726         /* When you run into this, adjust the code below for the new flag */
3727         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3728
3729         switch (statype) {
3730         case CFG80211_STA_MESH_PEER_KERNEL:
3731         case CFG80211_STA_MESH_PEER_USER:
3732                 /*
3733                  * No ignoring the TDLS flag here -- the userspace mesh
3734                  * code doesn't have the bug of including TDLS in the
3735                  * mask everywhere.
3736                  */
3737                 if (params->sta_flags_mask &
3738                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3739                                   BIT(NL80211_STA_FLAG_MFP) |
3740                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3741                         return -EINVAL;
3742                 break;
3743         case CFG80211_STA_TDLS_PEER_SETUP:
3744         case CFG80211_STA_TDLS_PEER_ACTIVE:
3745                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3746                         return -EINVAL;
3747                 /* ignore since it can't change */
3748                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3749                 break;
3750         default:
3751                 /* disallow mesh-specific things */
3752                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3753                         return -EINVAL;
3754                 if (params->local_pm)
3755                         return -EINVAL;
3756                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3757                         return -EINVAL;
3758         }
3759
3760         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3761             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3762                 /* TDLS can't be set, ... */
3763                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3764                         return -EINVAL;
3765                 /*
3766                  * ... but don't bother the driver with it. This works around
3767                  * a hostapd/wpa_supplicant issue -- it always includes the
3768                  * TLDS_PEER flag in the mask even for AP mode.
3769                  */
3770                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3771         }
3772
3773         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3774                 /* reject other things that can't change */
3775                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3776                         return -EINVAL;
3777                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3778                         return -EINVAL;
3779                 if (params->supported_rates)
3780                         return -EINVAL;
3781                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3782                         return -EINVAL;
3783         }
3784
3785         if (statype != CFG80211_STA_AP_CLIENT) {
3786                 if (params->vlan)
3787                         return -EINVAL;
3788         }
3789
3790         switch (statype) {
3791         case CFG80211_STA_AP_MLME_CLIENT:
3792                 /* Use this only for authorizing/unauthorizing a station */
3793                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3794                         return -EOPNOTSUPP;
3795                 break;
3796         case CFG80211_STA_AP_CLIENT:
3797                 /* accept only the listed bits */
3798                 if (params->sta_flags_mask &
3799                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3800                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3801                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3802                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3803                                   BIT(NL80211_STA_FLAG_WME) |
3804                                   BIT(NL80211_STA_FLAG_MFP)))
3805                         return -EINVAL;
3806
3807                 /* but authenticated/associated only if driver handles it */
3808                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3809                     params->sta_flags_mask &
3810                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3811                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3812                         return -EINVAL;
3813                 break;
3814         case CFG80211_STA_IBSS:
3815         case CFG80211_STA_AP_STA:
3816                 /* reject any changes other than AUTHORIZED */
3817                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3818                         return -EINVAL;
3819                 break;
3820         case CFG80211_STA_TDLS_PEER_SETUP:
3821                 /* reject any changes other than AUTHORIZED or WME */
3822                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3823                                                BIT(NL80211_STA_FLAG_WME)))
3824                         return -EINVAL;
3825                 /* force (at least) rates when authorizing */
3826                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3827                     !params->supported_rates)
3828                         return -EINVAL;
3829                 break;
3830         case CFG80211_STA_TDLS_PEER_ACTIVE:
3831                 /* reject any changes */
3832                 return -EINVAL;
3833         case CFG80211_STA_MESH_PEER_KERNEL:
3834                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3835                         return -EINVAL;
3836                 break;
3837         case CFG80211_STA_MESH_PEER_USER:
3838                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3839                         return -EINVAL;
3840                 break;
3841         }
3842
3843         return 0;
3844 }
3845 EXPORT_SYMBOL(cfg80211_check_station_change);
3846
3847 /*
3848  * Get vlan interface making sure it is running and on the right wiphy.
3849  */
3850 static struct net_device *get_vlan(struct genl_info *info,
3851                                    struct cfg80211_registered_device *rdev)
3852 {
3853         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3854         struct net_device *v;
3855         int ret;
3856
3857         if (!vlanattr)
3858                 return NULL;
3859
3860         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3861         if (!v)
3862                 return ERR_PTR(-ENODEV);
3863
3864         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3865                 ret = -EINVAL;
3866                 goto error;
3867         }
3868
3869         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3870             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3871             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3872                 ret = -EINVAL;
3873                 goto error;
3874         }
3875
3876         if (!netif_running(v)) {
3877                 ret = -ENETDOWN;
3878                 goto error;
3879         }
3880
3881         return v;
3882  error:
3883         dev_put(v);
3884         return ERR_PTR(ret);
3885 }
3886
3887 static struct nla_policy
3888 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3889         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3890         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3891 };
3892
3893 static int nl80211_parse_sta_wme(struct genl_info *info,
3894                                  struct station_parameters *params)
3895 {
3896         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3897         struct nlattr *nla;
3898         int err;
3899
3900         /* parse WME attributes if present */
3901         if (!info->attrs[NL80211_ATTR_STA_WME])
3902                 return 0;
3903
3904         nla = info->attrs[NL80211_ATTR_STA_WME];
3905         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3906                                nl80211_sta_wme_policy);
3907         if (err)
3908                 return err;
3909
3910         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3911                 params->uapsd_queues = nla_get_u8(
3912                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3913         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3914                 return -EINVAL;
3915
3916         if (tb[NL80211_STA_WME_MAX_SP])
3917                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3918
3919         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3920                 return -EINVAL;
3921
3922         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3923
3924         return 0;
3925 }
3926
3927 static int nl80211_parse_sta_channel_info(struct genl_info *info,
3928                                       struct station_parameters *params)
3929 {
3930         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
3931                 params->supported_channels =
3932                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3933                 params->supported_channels_len =
3934                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3935                 /*
3936                  * Need to include at least one (first channel, number of
3937                  * channels) tuple for each subband, and must have proper
3938                  * tuples for the rest of the data as well.
3939                  */
3940                 if (params->supported_channels_len < 2)
3941                         return -EINVAL;
3942                 if (params->supported_channels_len % 2)
3943                         return -EINVAL;
3944         }
3945
3946         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
3947                 params->supported_oper_classes =
3948                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3949                 params->supported_oper_classes_len =
3950                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3951                 /*
3952                  * The value of the Length field of the Supported Operating
3953                  * Classes element is between 2 and 253.
3954                  */
3955                 if (params->supported_oper_classes_len < 2 ||
3956                     params->supported_oper_classes_len > 253)
3957                         return -EINVAL;
3958         }
3959         return 0;
3960 }
3961
3962 static int nl80211_set_station_tdls(struct genl_info *info,
3963                                     struct station_parameters *params)
3964 {
3965         int err;
3966         /* Dummy STA entry gets updated once the peer capabilities are known */
3967         if (info->attrs[NL80211_ATTR_PEER_AID])
3968                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3969         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3970                 params->ht_capa =
3971                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3972         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3973                 params->vht_capa =
3974                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3975
3976         err = nl80211_parse_sta_channel_info(info, params);
3977         if (err)
3978                 return err;
3979
3980         return nl80211_parse_sta_wme(info, params);
3981 }
3982
3983 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3984 {
3985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3986         struct net_device *dev = info->user_ptr[1];
3987         struct station_parameters params;
3988         u8 *mac_addr;
3989         int err;
3990
3991         memset(&params, 0, sizeof(params));
3992
3993         params.listen_interval = -1;
3994
3995         if (!rdev->ops->change_station)
3996                 return -EOPNOTSUPP;
3997
3998         if (info->attrs[NL80211_ATTR_STA_AID])
3999                 return -EINVAL;
4000
4001         if (!info->attrs[NL80211_ATTR_MAC])
4002                 return -EINVAL;
4003
4004         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4005
4006         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4007                 params.supported_rates =
4008                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4009                 params.supported_rates_len =
4010                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4011         }
4012
4013         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4014                 params.capability =
4015                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4016                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4017         }
4018
4019         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4020                 params.ext_capab =
4021                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4022                 params.ext_capab_len =
4023                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4024         }
4025
4026         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4027                 return -EINVAL;
4028
4029         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4030                 return -EINVAL;
4031
4032         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4033                 params.plink_action =
4034                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4035                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4036                         return -EINVAL;
4037         }
4038
4039         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4040                 params.plink_state =
4041                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4042                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4043                         return -EINVAL;
4044                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4045         }
4046
4047         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4048                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4049                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4050
4051                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4052                     pm > NL80211_MESH_POWER_MAX)
4053                         return -EINVAL;
4054
4055                 params.local_pm = pm;
4056         }
4057
4058         /* Include parameters for TDLS peer (will check later) */
4059         err = nl80211_set_station_tdls(info, &params);
4060         if (err)
4061                 return err;
4062
4063         params.vlan = get_vlan(info, rdev);
4064         if (IS_ERR(params.vlan))
4065                 return PTR_ERR(params.vlan);
4066
4067         switch (dev->ieee80211_ptr->iftype) {
4068         case NL80211_IFTYPE_AP:
4069         case NL80211_IFTYPE_AP_VLAN:
4070         case NL80211_IFTYPE_P2P_GO:
4071         case NL80211_IFTYPE_P2P_CLIENT:
4072         case NL80211_IFTYPE_STATION:
4073         case NL80211_IFTYPE_ADHOC:
4074         case NL80211_IFTYPE_MESH_POINT:
4075                 break;
4076         default:
4077                 err = -EOPNOTSUPP;
4078                 goto out_put_vlan;
4079         }
4080
4081         /* driver will call cfg80211_check_station_change() */
4082         err = rdev_change_station(rdev, dev, mac_addr, &params);
4083
4084  out_put_vlan:
4085         if (params.vlan)
4086                 dev_put(params.vlan);
4087
4088         return err;
4089 }
4090
4091 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4092 {
4093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4094         int err;
4095         struct net_device *dev = info->user_ptr[1];
4096         struct station_parameters params;
4097         u8 *mac_addr = NULL;
4098
4099         memset(&params, 0, sizeof(params));
4100
4101         if (!rdev->ops->add_station)
4102                 return -EOPNOTSUPP;
4103
4104         if (!info->attrs[NL80211_ATTR_MAC])
4105                 return -EINVAL;
4106
4107         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4108                 return -EINVAL;
4109
4110         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4111                 return -EINVAL;
4112
4113         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4114             !info->attrs[NL80211_ATTR_PEER_AID])
4115                 return -EINVAL;
4116
4117         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4118         params.supported_rates =
4119                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4120         params.supported_rates_len =
4121                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4122         params.listen_interval =
4123                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4124
4125         if (info->attrs[NL80211_ATTR_PEER_AID])
4126                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4127         else
4128                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4129         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4130                 return -EINVAL;
4131
4132         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4133                 params.capability =
4134                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4135                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4136         }
4137
4138         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4139                 params.ext_capab =
4140                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4141                 params.ext_capab_len =
4142                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4143         }
4144
4145         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4146                 params.ht_capa =
4147                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4148
4149         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4150                 params.vht_capa =
4151                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4152
4153         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4154                 params.opmode_notif_used = true;
4155                 params.opmode_notif =
4156                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4157         }
4158
4159         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4160                 params.plink_action =
4161                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4162                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4163                         return -EINVAL;
4164         }
4165
4166         err = nl80211_parse_sta_channel_info(info, &params);
4167         if (err)
4168                 return err;
4169
4170         err = nl80211_parse_sta_wme(info, &params);
4171         if (err)
4172                 return err;
4173
4174         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4175                 return -EINVAL;
4176
4177         /* When you run into this, adjust the code below for the new flag */
4178         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4179
4180         switch (dev->ieee80211_ptr->iftype) {
4181         case NL80211_IFTYPE_AP:
4182         case NL80211_IFTYPE_AP_VLAN:
4183         case NL80211_IFTYPE_P2P_GO:
4184                 /* ignore WME attributes if iface/sta is not capable */
4185                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4186                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4187                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4188
4189                 /* TDLS peers cannot be added */
4190                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4191                     info->attrs[NL80211_ATTR_PEER_AID])
4192                         return -EINVAL;
4193                 /* but don't bother the driver with it */
4194                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4195
4196                 /* allow authenticated/associated only if driver handles it */
4197                 if (!(rdev->wiphy.features &
4198                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4199                     params.sta_flags_mask &
4200                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4201                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4202                         return -EINVAL;
4203
4204                 /* must be last in here for error handling */
4205                 params.vlan = get_vlan(info, rdev);
4206                 if (IS_ERR(params.vlan))
4207                         return PTR_ERR(params.vlan);
4208                 break;
4209         case NL80211_IFTYPE_MESH_POINT:
4210                 /* ignore uAPSD data */
4211                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4212
4213                 /* associated is disallowed */
4214                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4215                         return -EINVAL;
4216                 /* TDLS peers cannot be added */
4217                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4218                     info->attrs[NL80211_ATTR_PEER_AID])
4219                         return -EINVAL;
4220                 break;
4221         case NL80211_IFTYPE_STATION:
4222         case NL80211_IFTYPE_P2P_CLIENT:
4223                 /* ignore uAPSD data */
4224                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4225
4226                 /* these are disallowed */
4227                 if (params.sta_flags_mask &
4228                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4229                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4230                         return -EINVAL;
4231                 /* Only TDLS peers can be added */
4232                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4233                         return -EINVAL;
4234                 /* Can only add if TDLS ... */
4235                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4236                         return -EOPNOTSUPP;
4237                 /* ... with external setup is supported */
4238                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4239                         return -EOPNOTSUPP;
4240                 /*
4241                  * Older wpa_supplicant versions always mark the TDLS peer
4242                  * as authorized, but it shouldn't yet be.
4243                  */
4244                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4245                 break;
4246         default:
4247                 return -EOPNOTSUPP;
4248         }
4249
4250         /* be aware of params.vlan when changing code here */
4251
4252         err = rdev_add_station(rdev, dev, mac_addr, &params);
4253
4254         if (params.vlan)
4255                 dev_put(params.vlan);
4256         return err;
4257 }
4258
4259 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4260 {
4261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4262         struct net_device *dev = info->user_ptr[1];
4263         u8 *mac_addr = NULL;
4264
4265         if (info->attrs[NL80211_ATTR_MAC])
4266                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4267
4268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4270             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4271             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4272                 return -EINVAL;
4273
4274         if (!rdev->ops->del_station)
4275                 return -EOPNOTSUPP;
4276
4277         return rdev_del_station(rdev, dev, mac_addr);
4278 }
4279
4280 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4281                                 int flags, struct net_device *dev,
4282                                 u8 *dst, u8 *next_hop,
4283                                 struct mpath_info *pinfo)
4284 {
4285         void *hdr;
4286         struct nlattr *pinfoattr;
4287
4288         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4289         if (!hdr)
4290                 return -1;
4291
4292         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4293             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4294             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4295             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4296                 goto nla_put_failure;
4297
4298         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4299         if (!pinfoattr)
4300                 goto nla_put_failure;
4301         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4302             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4303                         pinfo->frame_qlen))
4304                 goto nla_put_failure;
4305         if (((pinfo->filled & MPATH_INFO_SN) &&
4306              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4307             ((pinfo->filled & MPATH_INFO_METRIC) &&
4308              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4309                          pinfo->metric)) ||
4310             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4311              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4312                          pinfo->exptime)) ||
4313             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4314              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4315                         pinfo->flags)) ||
4316             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4317              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4318                          pinfo->discovery_timeout)) ||
4319             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4320              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4321                         pinfo->discovery_retries)))
4322                 goto nla_put_failure;
4323
4324         nla_nest_end(msg, pinfoattr);
4325
4326         return genlmsg_end(msg, hdr);
4327
4328  nla_put_failure:
4329         genlmsg_cancel(msg, hdr);
4330         return -EMSGSIZE;
4331 }
4332
4333 static int nl80211_dump_mpath(struct sk_buff *skb,
4334                               struct netlink_callback *cb)
4335 {
4336         struct mpath_info pinfo;
4337         struct cfg80211_registered_device *dev;
4338         struct wireless_dev *wdev;
4339         u8 dst[ETH_ALEN];
4340         u8 next_hop[ETH_ALEN];
4341         int path_idx = cb->args[2];
4342         int err;
4343
4344         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4345         if (err)
4346                 return err;
4347
4348         if (!dev->ops->dump_mpath) {
4349                 err = -EOPNOTSUPP;
4350                 goto out_err;
4351         }
4352
4353         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4354                 err = -EOPNOTSUPP;
4355                 goto out_err;
4356         }
4357
4358         while (1) {
4359                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4360                                       next_hop, &pinfo);
4361                 if (err == -ENOENT)
4362                         break;
4363                 if (err)
4364                         goto out_err;
4365
4366                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4367                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4368                                        wdev->netdev, dst, next_hop,
4369                                        &pinfo) < 0)
4370                         goto out;
4371
4372                 path_idx++;
4373         }
4374
4375
4376  out:
4377         cb->args[2] = path_idx;
4378         err = skb->len;
4379  out_err:
4380         nl80211_finish_wdev_dump(dev);
4381         return err;
4382 }
4383
4384 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4385 {
4386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4387         int err;
4388         struct net_device *dev = info->user_ptr[1];
4389         struct mpath_info pinfo;
4390         struct sk_buff *msg;
4391         u8 *dst = NULL;
4392         u8 next_hop[ETH_ALEN];
4393
4394         memset(&pinfo, 0, sizeof(pinfo));
4395
4396         if (!info->attrs[NL80211_ATTR_MAC])
4397                 return -EINVAL;
4398
4399         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4400
4401         if (!rdev->ops->get_mpath)
4402                 return -EOPNOTSUPP;
4403
4404         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4405                 return -EOPNOTSUPP;
4406
4407         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4408         if (err)
4409                 return err;
4410
4411         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4412         if (!msg)
4413                 return -ENOMEM;
4414
4415         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4416                                  dev, dst, next_hop, &pinfo) < 0) {
4417                 nlmsg_free(msg);
4418                 return -ENOBUFS;
4419         }
4420
4421         return genlmsg_reply(msg, info);
4422 }
4423
4424 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4425 {
4426         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4427         struct net_device *dev = info->user_ptr[1];
4428         u8 *dst = NULL;
4429         u8 *next_hop = NULL;
4430
4431         if (!info->attrs[NL80211_ATTR_MAC])
4432                 return -EINVAL;
4433
4434         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4435                 return -EINVAL;
4436
4437         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4438         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4439
4440         if (!rdev->ops->change_mpath)
4441                 return -EOPNOTSUPP;
4442
4443         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4444                 return -EOPNOTSUPP;
4445
4446         return rdev_change_mpath(rdev, dev, dst, next_hop);
4447 }
4448
4449 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4450 {
4451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4452         struct net_device *dev = info->user_ptr[1];
4453         u8 *dst = NULL;
4454         u8 *next_hop = NULL;
4455
4456         if (!info->attrs[NL80211_ATTR_MAC])
4457                 return -EINVAL;
4458
4459         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4460                 return -EINVAL;
4461
4462         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4463         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4464
4465         if (!rdev->ops->add_mpath)
4466                 return -EOPNOTSUPP;
4467
4468         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4469                 return -EOPNOTSUPP;
4470
4471         return rdev_add_mpath(rdev, dev, dst, next_hop);
4472 }
4473
4474 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4475 {
4476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4477         struct net_device *dev = info->user_ptr[1];
4478         u8 *dst = NULL;
4479
4480         if (info->attrs[NL80211_ATTR_MAC])
4481                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4482
4483         if (!rdev->ops->del_mpath)
4484                 return -EOPNOTSUPP;
4485
4486         return rdev_del_mpath(rdev, dev, dst);
4487 }
4488
4489 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4490 {
4491         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4492         struct net_device *dev = info->user_ptr[1];
4493         struct wireless_dev *wdev = dev->ieee80211_ptr;
4494         struct bss_parameters params;
4495         int err;
4496
4497         memset(&params, 0, sizeof(params));
4498         /* default to not changing parameters */
4499         params.use_cts_prot = -1;
4500         params.use_short_preamble = -1;
4501         params.use_short_slot_time = -1;
4502         params.ap_isolate = -1;
4503         params.ht_opmode = -1;
4504         params.p2p_ctwindow = -1;
4505         params.p2p_opp_ps = -1;
4506
4507         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4508                 params.use_cts_prot =
4509                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4510         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4511                 params.use_short_preamble =
4512                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4513         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4514                 params.use_short_slot_time =
4515                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4516         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4517                 params.basic_rates =
4518                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4519                 params.basic_rates_len =
4520                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4521         }
4522         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4523                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4524         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4525                 params.ht_opmode =
4526                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4527
4528         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4529                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4530                         return -EINVAL;
4531                 params.p2p_ctwindow =
4532                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4533                 if (params.p2p_ctwindow < 0)
4534                         return -EINVAL;
4535                 if (params.p2p_ctwindow != 0 &&
4536                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4537                         return -EINVAL;
4538         }
4539
4540         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4541                 u8 tmp;
4542
4543                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4544                         return -EINVAL;
4545                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4546                 if (tmp > 1)
4547                         return -EINVAL;
4548                 params.p2p_opp_ps = tmp;
4549                 if (params.p2p_opp_ps &&
4550                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4551                         return -EINVAL;
4552         }
4553
4554         if (!rdev->ops->change_bss)
4555                 return -EOPNOTSUPP;
4556
4557         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4558             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4559                 return -EOPNOTSUPP;
4560
4561         wdev_lock(wdev);
4562         err = rdev_change_bss(rdev, dev, &params);
4563         wdev_unlock(wdev);
4564
4565         return err;
4566 }
4567
4568 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4569         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4570         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4571         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4572         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4573         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4574         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4575 };
4576
4577 static int parse_reg_rule(struct nlattr *tb[],
4578         struct ieee80211_reg_rule *reg_rule)
4579 {
4580         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4581         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4582
4583         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4584                 return -EINVAL;
4585         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4586                 return -EINVAL;
4587         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4588                 return -EINVAL;
4589         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4590                 return -EINVAL;
4591         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4592                 return -EINVAL;
4593
4594         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4595
4596         freq_range->start_freq_khz =
4597                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4598         freq_range->end_freq_khz =
4599                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4600         freq_range->max_bandwidth_khz =
4601                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4602
4603         power_rule->max_eirp =
4604                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4605
4606         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4607                 power_rule->max_antenna_gain =
4608                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4609
4610         return 0;
4611 }
4612
4613 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4614 {
4615         int r;
4616         char *data = NULL;
4617         enum nl80211_user_reg_hint_type user_reg_hint_type;
4618
4619         /*
4620          * You should only get this when cfg80211 hasn't yet initialized
4621          * completely when built-in to the kernel right between the time
4622          * window between nl80211_init() and regulatory_init(), if that is
4623          * even possible.
4624          */
4625         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4626                 return -EINPROGRESS;
4627
4628         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4629                 return -EINVAL;
4630
4631         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4632
4633         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4634                 user_reg_hint_type =
4635                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4636         else
4637                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4638
4639         switch (user_reg_hint_type) {
4640         case NL80211_USER_REG_HINT_USER:
4641         case NL80211_USER_REG_HINT_CELL_BASE:
4642                 break;
4643         default:
4644                 return -EINVAL;
4645         }
4646
4647         r = regulatory_hint_user(data, user_reg_hint_type);
4648
4649         return r;
4650 }
4651
4652 static int nl80211_get_mesh_config(struct sk_buff *skb,
4653                                    struct genl_info *info)
4654 {
4655         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4656         struct net_device *dev = info->user_ptr[1];
4657         struct wireless_dev *wdev = dev->ieee80211_ptr;
4658         struct mesh_config cur_params;
4659         int err = 0;
4660         void *hdr;
4661         struct nlattr *pinfoattr;
4662         struct sk_buff *msg;
4663
4664         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4665                 return -EOPNOTSUPP;
4666
4667         if (!rdev->ops->get_mesh_config)
4668                 return -EOPNOTSUPP;
4669
4670         wdev_lock(wdev);
4671         /* If not connected, get default parameters */
4672         if (!wdev->mesh_id_len)
4673                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4674         else
4675                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4676         wdev_unlock(wdev);
4677
4678         if (err)
4679                 return err;
4680
4681         /* Draw up a netlink message to send back */
4682         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4683         if (!msg)
4684                 return -ENOMEM;
4685         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4686                              NL80211_CMD_GET_MESH_CONFIG);
4687         if (!hdr)
4688                 goto out;
4689         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4690         if (!pinfoattr)
4691                 goto nla_put_failure;
4692         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4693             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4694                         cur_params.dot11MeshRetryTimeout) ||
4695             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4696                         cur_params.dot11MeshConfirmTimeout) ||
4697             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4698                         cur_params.dot11MeshHoldingTimeout) ||
4699             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4700                         cur_params.dot11MeshMaxPeerLinks) ||
4701             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4702                        cur_params.dot11MeshMaxRetries) ||
4703             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4704                        cur_params.dot11MeshTTL) ||
4705             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4706                        cur_params.element_ttl) ||
4707             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4708                        cur_params.auto_open_plinks) ||
4709             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4710                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4711             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4712                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4713             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4714                         cur_params.path_refresh_time) ||
4715             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4716                         cur_params.min_discovery_timeout) ||
4717             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4718                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4719             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4720                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4721             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4722                         cur_params.dot11MeshHWMPperrMinInterval) ||
4723             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4724                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4725             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4726                        cur_params.dot11MeshHWMPRootMode) ||
4727             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4728                         cur_params.dot11MeshHWMPRannInterval) ||
4729             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4730                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4731             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4732                        cur_params.dot11MeshForwarding) ||
4733             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4734                         cur_params.rssi_threshold) ||
4735             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4736                         cur_params.ht_opmode) ||
4737             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4738                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4739             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4740                         cur_params.dot11MeshHWMProotInterval) ||
4741             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4742                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4743             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4744                         cur_params.power_mode) ||
4745             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4746                         cur_params.dot11MeshAwakeWindowDuration) ||
4747             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4748                         cur_params.plink_timeout))
4749                 goto nla_put_failure;
4750         nla_nest_end(msg, pinfoattr);
4751         genlmsg_end(msg, hdr);
4752         return genlmsg_reply(msg, info);
4753
4754  nla_put_failure:
4755         genlmsg_cancel(msg, hdr);
4756  out:
4757         nlmsg_free(msg);
4758         return -ENOBUFS;
4759 }
4760
4761 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4762         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4763         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4764         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4765         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4766         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4767         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4768         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4769         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4770         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4771         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4772         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4773         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4774         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4775         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4776         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4777         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4778         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4779         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4780         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4781         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4782         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4783         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4784         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4785         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4786         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4787         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4788         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4789         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4790 };
4791
4792 static const struct nla_policy
4793         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4794         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4795         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4796         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4797         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4798         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4799         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4800         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4801                                     .len = IEEE80211_MAX_DATA_LEN },
4802         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4803 };
4804
4805 static int nl80211_parse_mesh_config(struct genl_info *info,
4806                                      struct mesh_config *cfg,
4807                                      u32 *mask_out)
4808 {
4809         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4810         u32 mask = 0;
4811
4812 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4813 do {                                                                        \
4814         if (tb[attr]) {                                                     \
4815                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4816                         return -EINVAL;                                     \
4817                 cfg->param = fn(tb[attr]);                                  \
4818                 mask |= (1 << (attr - 1));                                  \
4819         }                                                                   \
4820 } while (0)
4821
4822
4823         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4824                 return -EINVAL;
4825         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4826                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4827                              nl80211_meshconf_params_policy))
4828                 return -EINVAL;
4829
4830         /* This makes sure that there aren't more than 32 mesh config
4831          * parameters (otherwise our bitfield scheme would not work.) */
4832         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4833
4834         /* Fill in the params struct */
4835         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4836                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4837                                   nla_get_u16);
4838         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4839                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4840                                   nla_get_u16);
4841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4842                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4843                                   nla_get_u16);
4844         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4845                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4846                                   nla_get_u16);
4847         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4848                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4849                                   nla_get_u8);
4850         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4851                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4852         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4853                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4854                                   nla_get_u8);
4855         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4856                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4857                                   nla_get_u8);
4858         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4859                                   1, 255, mask,
4860                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4861                                   nla_get_u32);
4862         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4863                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4864                                   nla_get_u8);
4865         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4866                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4867                                   nla_get_u32);
4868         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4869                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4870                                   nla_get_u16);
4871         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4872                                   1, 65535, mask,
4873                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4874                                   nla_get_u32);
4875         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4876                                   1, 65535, mask,
4877                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4878                                   nla_get_u16);
4879         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4880                                   1, 65535, mask,
4881                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4882                                   nla_get_u16);
4883         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4884                                   dot11MeshHWMPnetDiameterTraversalTime,
4885                                   1, 65535, mask,
4886                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4887                                   nla_get_u16);
4888         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4889                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4890                                   nla_get_u8);
4891         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4892                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4893                                   nla_get_u16);
4894         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4895                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4896                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4897                                   nla_get_u8);
4898         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4899                                   mask, NL80211_MESHCONF_FORWARDING,
4900                                   nla_get_u8);
4901         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4902                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4903                                   nla_get_s32);
4904         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4905                                   mask, NL80211_MESHCONF_HT_OPMODE,
4906                                   nla_get_u16);
4907         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4908                                   1, 65535, mask,
4909                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4910                                   nla_get_u32);
4911         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4912                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4913                                   nla_get_u16);
4914         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4915                                   dot11MeshHWMPconfirmationInterval,
4916                                   1, 65535, mask,
4917                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4918                                   nla_get_u16);
4919         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4920                                   NL80211_MESH_POWER_ACTIVE,
4921                                   NL80211_MESH_POWER_MAX,
4922                                   mask, NL80211_MESHCONF_POWER_MODE,
4923                                   nla_get_u32);
4924         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4925                                   0, 65535, mask,
4926                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4927         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4928                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4929                                   nla_get_u32);
4930         if (mask_out)
4931                 *mask_out = mask;
4932
4933         return 0;
4934
4935 #undef FILL_IN_MESH_PARAM_IF_SET
4936 }
4937
4938 static int nl80211_parse_mesh_setup(struct genl_info *info,
4939                                      struct mesh_setup *setup)
4940 {
4941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4942         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4943
4944         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4945                 return -EINVAL;
4946         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4947                              info->attrs[NL80211_ATTR_MESH_SETUP],
4948                              nl80211_mesh_setup_params_policy))
4949                 return -EINVAL;
4950
4951         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4952                 setup->sync_method =
4953                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4954                  IEEE80211_SYNC_METHOD_VENDOR :
4955                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4956
4957         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4958                 setup->path_sel_proto =
4959                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4960                  IEEE80211_PATH_PROTOCOL_VENDOR :
4961                  IEEE80211_PATH_PROTOCOL_HWMP;
4962
4963         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4964                 setup->path_metric =
4965                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4966                  IEEE80211_PATH_METRIC_VENDOR :
4967                  IEEE80211_PATH_METRIC_AIRTIME;
4968
4969
4970         if (tb[NL80211_MESH_SETUP_IE]) {
4971                 struct nlattr *ieattr =
4972                         tb[NL80211_MESH_SETUP_IE];
4973                 if (!is_valid_ie_attr(ieattr))
4974                         return -EINVAL;
4975                 setup->ie = nla_data(ieattr);
4976                 setup->ie_len = nla_len(ieattr);
4977         }
4978         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4979             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4980                 return -EINVAL;
4981         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4982         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4983         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4984         if (setup->is_secure)
4985                 setup->user_mpm = true;
4986
4987         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4988                 if (!setup->user_mpm)
4989                         return -EINVAL;
4990                 setup->auth_id =
4991                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4992         }
4993
4994         return 0;
4995 }
4996
4997 static int nl80211_update_mesh_config(struct sk_buff *skb,
4998                                       struct genl_info *info)
4999 {
5000         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5001         struct net_device *dev = info->user_ptr[1];
5002         struct wireless_dev *wdev = dev->ieee80211_ptr;
5003         struct mesh_config cfg;
5004         u32 mask;
5005         int err;
5006
5007         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5008                 return -EOPNOTSUPP;
5009
5010         if (!rdev->ops->update_mesh_config)
5011                 return -EOPNOTSUPP;
5012
5013         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5014         if (err)
5015                 return err;
5016
5017         wdev_lock(wdev);
5018         if (!wdev->mesh_id_len)
5019                 err = -ENOLINK;
5020
5021         if (!err)
5022                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5023
5024         wdev_unlock(wdev);
5025
5026         return err;
5027 }
5028
5029 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5030 {
5031         const struct ieee80211_regdomain *regdom;
5032         struct sk_buff *msg;
5033         void *hdr = NULL;
5034         struct nlattr *nl_reg_rules;
5035         unsigned int i;
5036
5037         if (!cfg80211_regdomain)
5038                 return -EINVAL;
5039
5040         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5041         if (!msg)
5042                 return -ENOBUFS;
5043
5044         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5045                              NL80211_CMD_GET_REG);
5046         if (!hdr)
5047                 goto put_failure;
5048
5049         if (reg_last_request_cell_base() &&
5050             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5051                         NL80211_USER_REG_HINT_CELL_BASE))
5052                 goto nla_put_failure;
5053
5054         rcu_read_lock();
5055         regdom = rcu_dereference(cfg80211_regdomain);
5056
5057         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5058             (regdom->dfs_region &&
5059              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5060                 goto nla_put_failure_rcu;
5061
5062         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5063         if (!nl_reg_rules)
5064                 goto nla_put_failure_rcu;
5065
5066         for (i = 0; i < regdom->n_reg_rules; i++) {
5067                 struct nlattr *nl_reg_rule;
5068                 const struct ieee80211_reg_rule *reg_rule;
5069                 const struct ieee80211_freq_range *freq_range;
5070                 const struct ieee80211_power_rule *power_rule;
5071
5072                 reg_rule = &regdom->reg_rules[i];
5073                 freq_range = &reg_rule->freq_range;
5074                 power_rule = &reg_rule->power_rule;
5075
5076                 nl_reg_rule = nla_nest_start(msg, i);
5077                 if (!nl_reg_rule)
5078                         goto nla_put_failure_rcu;
5079
5080                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5081                                 reg_rule->flags) ||
5082                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5083                                 freq_range->start_freq_khz) ||
5084                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5085                                 freq_range->end_freq_khz) ||
5086                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5087                                 freq_range->max_bandwidth_khz) ||
5088                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5089                                 power_rule->max_antenna_gain) ||
5090                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5091                                 power_rule->max_eirp))
5092                         goto nla_put_failure_rcu;
5093
5094                 nla_nest_end(msg, nl_reg_rule);
5095         }
5096         rcu_read_unlock();
5097
5098         nla_nest_end(msg, nl_reg_rules);
5099
5100         genlmsg_end(msg, hdr);
5101         return genlmsg_reply(msg, info);
5102
5103 nla_put_failure_rcu:
5104         rcu_read_unlock();
5105 nla_put_failure:
5106         genlmsg_cancel(msg, hdr);
5107 put_failure:
5108         nlmsg_free(msg);
5109         return -EMSGSIZE;
5110 }
5111
5112 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5113 {
5114         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5115         struct nlattr *nl_reg_rule;
5116         char *alpha2 = NULL;
5117         int rem_reg_rules = 0, r = 0;
5118         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5119         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5120         struct ieee80211_regdomain *rd = NULL;
5121
5122         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5123                 return -EINVAL;
5124
5125         if (!info->attrs[NL80211_ATTR_REG_RULES])
5126                 return -EINVAL;
5127
5128         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5129
5130         if (info->attrs[NL80211_ATTR_DFS_REGION])
5131                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5132
5133         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5134                             rem_reg_rules) {
5135                 num_rules++;
5136                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5137                         return -EINVAL;
5138         }
5139
5140         if (!reg_is_valid_request(alpha2))
5141                 return -EINVAL;
5142
5143         size_of_regd = sizeof(struct ieee80211_regdomain) +
5144                        num_rules * sizeof(struct ieee80211_reg_rule);
5145
5146         rd = kzalloc(size_of_regd, GFP_KERNEL);
5147         if (!rd)
5148                 return -ENOMEM;
5149
5150         rd->n_reg_rules = num_rules;
5151         rd->alpha2[0] = alpha2[0];
5152         rd->alpha2[1] = alpha2[1];
5153
5154         /*
5155          * Disable DFS master mode if the DFS region was
5156          * not supported or known on this kernel.
5157          */
5158         if (reg_supported_dfs_region(dfs_region))
5159                 rd->dfs_region = dfs_region;
5160
5161         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5162                             rem_reg_rules) {
5163                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5164                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5165                           reg_rule_policy);
5166                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5167                 if (r)
5168                         goto bad_reg;
5169
5170                 rule_idx++;
5171
5172                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5173                         r = -EINVAL;
5174                         goto bad_reg;
5175                 }
5176         }
5177
5178         r = set_regdom(rd);
5179         /* set_regdom took ownership */
5180         rd = NULL;
5181
5182  bad_reg:
5183         kfree(rd);
5184         return r;
5185 }
5186
5187 static int validate_scan_freqs(struct nlattr *freqs)
5188 {
5189         struct nlattr *attr1, *attr2;
5190         int n_channels = 0, tmp1, tmp2;
5191
5192         nla_for_each_nested(attr1, freqs, tmp1) {
5193                 n_channels++;
5194                 /*
5195                  * Some hardware has a limited channel list for
5196                  * scanning, and it is pretty much nonsensical
5197                  * to scan for a channel twice, so disallow that
5198                  * and don't require drivers to check that the
5199                  * channel list they get isn't longer than what
5200                  * they can scan, as long as they can scan all
5201                  * the channels they registered at once.
5202                  */
5203                 nla_for_each_nested(attr2, freqs, tmp2)
5204                         if (attr1 != attr2 &&
5205                             nla_get_u32(attr1) == nla_get_u32(attr2))
5206                                 return 0;
5207         }
5208
5209         return n_channels;
5210 }
5211
5212 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5213 {
5214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5215         struct wireless_dev *wdev = info->user_ptr[1];
5216         struct cfg80211_scan_request *request;
5217         struct nlattr *attr;
5218         struct wiphy *wiphy;
5219         int err, tmp, n_ssids = 0, n_channels, i;
5220         size_t ie_len;
5221
5222         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5223                 return -EINVAL;
5224
5225         wiphy = &rdev->wiphy;
5226
5227         if (!rdev->ops->scan)
5228                 return -EOPNOTSUPP;
5229
5230         if (rdev->scan_req) {
5231                 err = -EBUSY;
5232                 goto unlock;
5233         }
5234
5235         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5236                 n_channels = validate_scan_freqs(
5237                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5238                 if (!n_channels) {
5239                         err = -EINVAL;
5240                         goto unlock;
5241                 }
5242         } else {
5243                 enum ieee80211_band band;
5244                 n_channels = 0;
5245
5246                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5247                         if (wiphy->bands[band])
5248                                 n_channels += wiphy->bands[band]->n_channels;
5249         }
5250
5251         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5252                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5253                         n_ssids++;
5254
5255         if (n_ssids > wiphy->max_scan_ssids) {
5256                 err = -EINVAL;
5257                 goto unlock;
5258         }
5259
5260         if (info->attrs[NL80211_ATTR_IE])
5261                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5262         else
5263                 ie_len = 0;
5264
5265         if (ie_len > wiphy->max_scan_ie_len) {
5266                 err = -EINVAL;
5267                 goto unlock;
5268         }
5269
5270         request = kzalloc(sizeof(*request)
5271                         + sizeof(*request->ssids) * n_ssids
5272                         + sizeof(*request->channels) * n_channels
5273                         + ie_len, GFP_KERNEL);
5274         if (!request) {
5275                 err = -ENOMEM;
5276                 goto unlock;
5277         }
5278
5279         if (n_ssids)
5280                 request->ssids = (void *)&request->channels[n_channels];
5281         request->n_ssids = n_ssids;
5282         if (ie_len) {
5283                 if (request->ssids)
5284                         request->ie = (void *)(request->ssids + n_ssids);
5285                 else
5286                         request->ie = (void *)(request->channels + n_channels);
5287         }
5288
5289         i = 0;
5290         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5291                 /* user specified, bail out if channel not found */
5292                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5293                         struct ieee80211_channel *chan;
5294
5295                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5296
5297                         if (!chan) {
5298                                 err = -EINVAL;
5299                                 goto out_free;
5300                         }
5301
5302                         /* ignore disabled channels */
5303                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5304                                 continue;
5305
5306                         request->channels[i] = chan;
5307                         i++;
5308                 }
5309         } else {
5310                 enum ieee80211_band band;
5311
5312                 /* all channels */
5313                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5314                         int j;
5315                         if (!wiphy->bands[band])
5316                                 continue;
5317                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5318                                 struct ieee80211_channel *chan;
5319
5320                                 chan = &wiphy->bands[band]->channels[j];
5321
5322                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5323                                         continue;
5324
5325                                 request->channels[i] = chan;
5326                                 i++;
5327                         }
5328                 }
5329         }
5330
5331         if (!i) {
5332                 err = -EINVAL;
5333                 goto out_free;
5334         }
5335
5336         request->n_channels = i;
5337
5338         i = 0;
5339         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5340                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5341                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5342                                 err = -EINVAL;
5343                                 goto out_free;
5344                         }
5345                         request->ssids[i].ssid_len = nla_len(attr);
5346                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5347                         i++;
5348                 }
5349         }
5350
5351         if (info->attrs[NL80211_ATTR_IE]) {
5352                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5353                 memcpy((void *)request->ie,
5354                        nla_data(info->attrs[NL80211_ATTR_IE]),
5355                        request->ie_len);
5356         }
5357
5358         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5359                 if (wiphy->bands[i])
5360                         request->rates[i] =
5361                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5362
5363         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5364                 nla_for_each_nested(attr,
5365                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5366                                     tmp) {
5367                         enum ieee80211_band band = nla_type(attr);
5368
5369                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5370                                 err = -EINVAL;
5371                                 goto out_free;
5372                         }
5373                         err = ieee80211_get_ratemask(wiphy->bands[band],
5374                                                      nla_data(attr),
5375                                                      nla_len(attr),
5376                                                      &request->rates[band]);
5377                         if (err)
5378                                 goto out_free;
5379                 }
5380         }
5381
5382         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5383                 request->flags = nla_get_u32(
5384                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5385                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5386                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5387                         err = -EOPNOTSUPP;
5388                         goto out_free;
5389                 }
5390         }
5391
5392         request->no_cck =
5393                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5394
5395         request->wdev = wdev;
5396         request->wiphy = &rdev->wiphy;
5397         request->scan_start = jiffies;
5398
5399         rdev->scan_req = request;
5400         err = rdev_scan(rdev, request);
5401
5402         if (!err) {
5403                 nl80211_send_scan_start(rdev, wdev);
5404                 if (wdev->netdev)
5405                         dev_hold(wdev->netdev);
5406         } else {
5407  out_free:
5408                 rdev->scan_req = NULL;
5409                 kfree(request);
5410         }
5411
5412  unlock:
5413         return err;
5414 }
5415
5416 static int nl80211_start_sched_scan(struct sk_buff *skb,
5417                                     struct genl_info *info)
5418 {
5419         struct cfg80211_sched_scan_request *request;
5420         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5421         struct net_device *dev = info->user_ptr[1];
5422         struct nlattr *attr;
5423         struct wiphy *wiphy;
5424         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5425         u32 interval;
5426         enum ieee80211_band band;
5427         size_t ie_len;
5428         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5429
5430         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5431             !rdev->ops->sched_scan_start)
5432                 return -EOPNOTSUPP;
5433
5434         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5435                 return -EINVAL;
5436
5437         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5438                 return -EINVAL;
5439
5440         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5441         if (interval == 0)
5442                 return -EINVAL;
5443
5444         wiphy = &rdev->wiphy;
5445
5446         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5447                 n_channels = validate_scan_freqs(
5448                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5449                 if (!n_channels)
5450                         return -EINVAL;
5451         } else {
5452                 n_channels = 0;
5453
5454                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5455                         if (wiphy->bands[band])
5456                                 n_channels += wiphy->bands[band]->n_channels;
5457         }
5458
5459         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5460                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5461                                     tmp)
5462                         n_ssids++;
5463
5464         if (n_ssids > wiphy->max_sched_scan_ssids)
5465                 return -EINVAL;
5466
5467         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5468                 nla_for_each_nested(attr,
5469                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5470                                     tmp)
5471                         n_match_sets++;
5472
5473         if (n_match_sets > wiphy->max_match_sets)
5474                 return -EINVAL;
5475
5476         if (info->attrs[NL80211_ATTR_IE])
5477                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5478         else
5479                 ie_len = 0;
5480
5481         if (ie_len > wiphy->max_sched_scan_ie_len)
5482                 return -EINVAL;
5483
5484         if (rdev->sched_scan_req) {
5485                 err = -EINPROGRESS;
5486                 goto out;
5487         }
5488
5489         request = kzalloc(sizeof(*request)
5490                         + sizeof(*request->ssids) * n_ssids
5491                         + sizeof(*request->match_sets) * n_match_sets
5492                         + sizeof(*request->channels) * n_channels
5493                         + ie_len, GFP_KERNEL);
5494         if (!request) {
5495                 err = -ENOMEM;
5496                 goto out;
5497         }
5498
5499         if (n_ssids)
5500                 request->ssids = (void *)&request->channels[n_channels];
5501         request->n_ssids = n_ssids;
5502         if (ie_len) {
5503                 if (request->ssids)
5504                         request->ie = (void *)(request->ssids + n_ssids);
5505                 else
5506                         request->ie = (void *)(request->channels + n_channels);
5507         }
5508
5509         if (n_match_sets) {
5510                 if (request->ie)
5511                         request->match_sets = (void *)(request->ie + ie_len);
5512                 else if (request->ssids)
5513                         request->match_sets =
5514                                 (void *)(request->ssids + n_ssids);
5515                 else
5516                         request->match_sets =
5517                                 (void *)(request->channels + n_channels);
5518         }
5519         request->n_match_sets = n_match_sets;
5520
5521         i = 0;
5522         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5523                 /* user specified, bail out if channel not found */
5524                 nla_for_each_nested(attr,
5525                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5526                                     tmp) {
5527                         struct ieee80211_channel *chan;
5528
5529                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5530
5531                         if (!chan) {
5532                                 err = -EINVAL;
5533                                 goto out_free;
5534                         }
5535
5536                         /* ignore disabled channels */
5537                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5538                                 continue;
5539
5540                         request->channels[i] = chan;
5541                         i++;
5542                 }
5543         } else {
5544                 /* all channels */
5545                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5546                         int j;
5547                         if (!wiphy->bands[band])
5548                                 continue;
5549                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5550                                 struct ieee80211_channel *chan;
5551
5552                                 chan = &wiphy->bands[band]->channels[j];
5553
5554                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5555                                         continue;
5556
5557                                 request->channels[i] = chan;
5558                                 i++;
5559                         }
5560                 }
5561         }
5562
5563         if (!i) {
5564                 err = -EINVAL;
5565                 goto out_free;
5566         }
5567
5568         request->n_channels = i;
5569
5570         i = 0;
5571         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5572                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5573                                     tmp) {
5574                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5575                                 err = -EINVAL;
5576                                 goto out_free;
5577                         }
5578                         request->ssids[i].ssid_len = nla_len(attr);
5579                         memcpy(request->ssids[i].ssid, nla_data(attr),
5580                                nla_len(attr));
5581                         i++;
5582                 }
5583         }
5584
5585         i = 0;
5586         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5587                 nla_for_each_nested(attr,
5588                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5589                                     tmp) {
5590                         struct nlattr *ssid, *rssi;
5591
5592                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5593                                   nla_data(attr), nla_len(attr),
5594                                   nl80211_match_policy);
5595                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5596                         if (ssid) {
5597                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5598                                         err = -EINVAL;
5599                                         goto out_free;
5600                                 }
5601                                 memcpy(request->match_sets[i].ssid.ssid,
5602                                        nla_data(ssid), nla_len(ssid));
5603                                 request->match_sets[i].ssid.ssid_len =
5604                                         nla_len(ssid);
5605                         }
5606                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5607                         if (rssi)
5608                                 request->rssi_thold = nla_get_u32(rssi);
5609                         else
5610                                 request->rssi_thold =
5611                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5612                         i++;
5613                 }
5614         }
5615
5616         if (info->attrs[NL80211_ATTR_IE]) {
5617                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5618                 memcpy((void *)request->ie,
5619                        nla_data(info->attrs[NL80211_ATTR_IE]),
5620                        request->ie_len);
5621         }
5622
5623         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5624                 request->flags = nla_get_u32(
5625                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5626                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5627                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5628                         err = -EOPNOTSUPP;
5629                         goto out_free;
5630                 }
5631         }
5632
5633         request->dev = dev;
5634         request->wiphy = &rdev->wiphy;
5635         request->interval = interval;
5636         request->scan_start = jiffies;
5637
5638         err = rdev_sched_scan_start(rdev, dev, request);
5639         if (!err) {
5640                 rdev->sched_scan_req = request;
5641                 nl80211_send_sched_scan(rdev, dev,
5642                                         NL80211_CMD_START_SCHED_SCAN);
5643                 goto out;
5644         }
5645
5646 out_free:
5647         kfree(request);
5648 out:
5649         return err;
5650 }
5651
5652 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5653                                    struct genl_info *info)
5654 {
5655         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5656
5657         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5658             !rdev->ops->sched_scan_stop)
5659                 return -EOPNOTSUPP;
5660
5661         return __cfg80211_stop_sched_scan(rdev, false);
5662 }
5663
5664 static int nl80211_start_radar_detection(struct sk_buff *skb,
5665                                          struct genl_info *info)
5666 {
5667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5668         struct net_device *dev = info->user_ptr[1];
5669         struct wireless_dev *wdev = dev->ieee80211_ptr;
5670         struct cfg80211_chan_def chandef;
5671         enum nl80211_dfs_regions dfs_region;
5672         int err;
5673
5674         dfs_region = reg_get_dfs_region(wdev->wiphy);
5675         if (dfs_region == NL80211_DFS_UNSET)
5676                 return -EINVAL;
5677
5678         err = nl80211_parse_chandef(rdev, info, &chandef);
5679         if (err)
5680                 return err;
5681
5682         if (netif_carrier_ok(dev))
5683                 return -EBUSY;
5684
5685         if (wdev->cac_started)
5686                 return -EBUSY;
5687
5688         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5689         if (err < 0)
5690                 return err;
5691
5692         if (err == 0)
5693                 return -EINVAL;
5694
5695         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5696                 return -EINVAL;
5697
5698         if (!rdev->ops->start_radar_detection)
5699                 return -EOPNOTSUPP;
5700
5701         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5702                                            chandef.chan, CHAN_MODE_SHARED,
5703                                            BIT(chandef.width));
5704         if (err)
5705                 return err;
5706
5707         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5708         if (!err) {
5709                 wdev->channel = chandef.chan;
5710                 wdev->cac_started = true;
5711                 wdev->cac_start_time = jiffies;
5712         }
5713         return err;
5714 }
5715
5716 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5717 {
5718         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5719         struct net_device *dev = info->user_ptr[1];
5720         struct wireless_dev *wdev = dev->ieee80211_ptr;
5721         struct cfg80211_csa_settings params;
5722         /* csa_attrs is defined static to avoid waste of stack size - this
5723          * function is called under RTNL lock, so this should not be a problem.
5724          */
5725         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5726         u8 radar_detect_width = 0;
5727         int err;
5728         bool need_new_beacon = false;
5729
5730         if (!rdev->ops->channel_switch ||
5731             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5732                 return -EOPNOTSUPP;
5733
5734         switch (dev->ieee80211_ptr->iftype) {
5735         case NL80211_IFTYPE_AP:
5736         case NL80211_IFTYPE_P2P_GO:
5737                 need_new_beacon = true;
5738
5739                 /* useless if AP is not running */
5740                 if (!wdev->beacon_interval)
5741                         return -EINVAL;
5742                 break;
5743         case NL80211_IFTYPE_ADHOC:
5744         case NL80211_IFTYPE_MESH_POINT:
5745                 break;
5746         default:
5747                 return -EOPNOTSUPP;
5748         }
5749
5750         memset(&params, 0, sizeof(params));
5751
5752         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5753             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5754                 return -EINVAL;
5755
5756         /* only important for AP, IBSS and mesh create IEs internally */
5757         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5758                 return -EINVAL;
5759
5760         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5761
5762         if (!need_new_beacon)
5763                 goto skip_beacons;
5764
5765         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5766         if (err)
5767                 return err;
5768
5769         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5770                                info->attrs[NL80211_ATTR_CSA_IES],
5771                                nl80211_policy);
5772         if (err)
5773                 return err;
5774
5775         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5776         if (err)
5777                 return err;
5778
5779         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5780                 return -EINVAL;
5781
5782         params.counter_offset_beacon =
5783                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5784         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5785                 return -EINVAL;
5786
5787         /* sanity check - counters should be the same */
5788         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5789             params.count)
5790                 return -EINVAL;
5791
5792         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5793                 params.counter_offset_presp =
5794                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5795                 if (params.counter_offset_presp >=
5796                     params.beacon_csa.probe_resp_len)
5797                         return -EINVAL;
5798
5799                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5800                     params.count)
5801                         return -EINVAL;
5802         }
5803
5804 skip_beacons:
5805         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5806         if (err)
5807                 return err;
5808
5809         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5810                 return -EINVAL;
5811
5812         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5813             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
5814             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
5815                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5816                                                     &params.chandef);
5817                 if (err < 0) {
5818                         return err;
5819                 } else if (err) {
5820                         radar_detect_width = BIT(params.chandef.width);
5821                         params.radar_required = true;
5822                 }
5823         }
5824
5825         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5826                                            params.chandef.chan,
5827                                            CHAN_MODE_SHARED,
5828                                            radar_detect_width);
5829         if (err)
5830                 return err;
5831
5832         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5833                 params.block_tx = true;
5834
5835         wdev_lock(wdev);
5836         err = rdev_channel_switch(rdev, dev, &params);
5837         wdev_unlock(wdev);
5838
5839         return err;
5840 }
5841
5842 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5843                             u32 seq, int flags,
5844                             struct cfg80211_registered_device *rdev,
5845                             struct wireless_dev *wdev,
5846                             struct cfg80211_internal_bss *intbss)
5847 {
5848         struct cfg80211_bss *res = &intbss->pub;
5849         const struct cfg80211_bss_ies *ies;
5850         void *hdr;
5851         struct nlattr *bss;
5852         bool tsf = false;
5853
5854         ASSERT_WDEV_LOCK(wdev);
5855
5856         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5857                              NL80211_CMD_NEW_SCAN_RESULTS);
5858         if (!hdr)
5859                 return -1;
5860
5861         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5862
5863         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5864                 goto nla_put_failure;
5865         if (wdev->netdev &&
5866             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5867                 goto nla_put_failure;
5868         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5869                 goto nla_put_failure;
5870
5871         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5872         if (!bss)
5873                 goto nla_put_failure;
5874         if ((!is_zero_ether_addr(res->bssid) &&
5875              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5876                 goto nla_put_failure;
5877
5878         rcu_read_lock();
5879         ies = rcu_dereference(res->ies);
5880         if (ies) {
5881                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5882                         goto fail_unlock_rcu;
5883                 tsf = true;
5884                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5885                                         ies->len, ies->data))
5886                         goto fail_unlock_rcu;
5887         }
5888         ies = rcu_dereference(res->beacon_ies);
5889         if (ies) {
5890                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5891                         goto fail_unlock_rcu;
5892                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5893                                         ies->len, ies->data))
5894                         goto fail_unlock_rcu;
5895         }
5896         rcu_read_unlock();
5897
5898         if (res->beacon_interval &&
5899             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5900                 goto nla_put_failure;
5901         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5902             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5903             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5904             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5905                         jiffies_to_msecs(jiffies - intbss->ts)))
5906                 goto nla_put_failure;
5907
5908         switch (rdev->wiphy.signal_type) {
5909         case CFG80211_SIGNAL_TYPE_MBM:
5910                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5911                         goto nla_put_failure;
5912                 break;
5913         case CFG80211_SIGNAL_TYPE_UNSPEC:
5914                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5915                         goto nla_put_failure;
5916                 break;
5917         default:
5918                 break;
5919         }
5920
5921         switch (wdev->iftype) {
5922         case NL80211_IFTYPE_P2P_CLIENT:
5923         case NL80211_IFTYPE_STATION:
5924                 if (intbss == wdev->current_bss &&
5925                     nla_put_u32(msg, NL80211_BSS_STATUS,
5926                                 NL80211_BSS_STATUS_ASSOCIATED))
5927                         goto nla_put_failure;
5928                 break;
5929         case NL80211_IFTYPE_ADHOC:
5930                 if (intbss == wdev->current_bss &&
5931                     nla_put_u32(msg, NL80211_BSS_STATUS,
5932                                 NL80211_BSS_STATUS_IBSS_JOINED))
5933                         goto nla_put_failure;
5934                 break;
5935         default:
5936                 break;
5937         }
5938
5939         nla_nest_end(msg, bss);
5940
5941         return genlmsg_end(msg, hdr);
5942
5943  fail_unlock_rcu:
5944         rcu_read_unlock();
5945  nla_put_failure:
5946         genlmsg_cancel(msg, hdr);
5947         return -EMSGSIZE;
5948 }
5949
5950 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5951 {
5952         struct cfg80211_registered_device *rdev;
5953         struct cfg80211_internal_bss *scan;
5954         struct wireless_dev *wdev;
5955         int start = cb->args[2], idx = 0;
5956         int err;
5957
5958         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5959         if (err)
5960                 return err;
5961
5962         wdev_lock(wdev);
5963         spin_lock_bh(&rdev->bss_lock);
5964         cfg80211_bss_expire(rdev);
5965
5966         cb->seq = rdev->bss_generation;
5967
5968         list_for_each_entry(scan, &rdev->bss_list, list) {
5969                 if (++idx <= start)
5970                         continue;
5971                 if (nl80211_send_bss(skb, cb,
5972                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5973                                 rdev, wdev, scan) < 0) {
5974                         idx--;
5975                         break;
5976                 }
5977         }
5978
5979         spin_unlock_bh(&rdev->bss_lock);
5980         wdev_unlock(wdev);
5981
5982         cb->args[2] = idx;
5983         nl80211_finish_wdev_dump(rdev);
5984
5985         return skb->len;
5986 }
5987
5988 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5989                                 int flags, struct net_device *dev,
5990                                 struct survey_info *survey)
5991 {
5992         void *hdr;
5993         struct nlattr *infoattr;
5994
5995         hdr = nl80211hdr_put(msg, portid, seq, flags,
5996                              NL80211_CMD_NEW_SURVEY_RESULTS);
5997         if (!hdr)
5998                 return -ENOMEM;
5999
6000         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6001                 goto nla_put_failure;
6002
6003         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6004         if (!infoattr)
6005                 goto nla_put_failure;
6006
6007         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6008                         survey->channel->center_freq))
6009                 goto nla_put_failure;
6010
6011         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6012             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6013                 goto nla_put_failure;
6014         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6015             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6016                 goto nla_put_failure;
6017         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6018             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6019                         survey->channel_time))
6020                 goto nla_put_failure;
6021         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6022             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6023                         survey->channel_time_busy))
6024                 goto nla_put_failure;
6025         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6026             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6027                         survey->channel_time_ext_busy))
6028                 goto nla_put_failure;
6029         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6030             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6031                         survey->channel_time_rx))
6032                 goto nla_put_failure;
6033         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6034             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6035                         survey->channel_time_tx))
6036                 goto nla_put_failure;
6037
6038         nla_nest_end(msg, infoattr);
6039
6040         return genlmsg_end(msg, hdr);
6041
6042  nla_put_failure:
6043         genlmsg_cancel(msg, hdr);
6044         return -EMSGSIZE;
6045 }
6046
6047 static int nl80211_dump_survey(struct sk_buff *skb,
6048                         struct netlink_callback *cb)
6049 {
6050         struct survey_info survey;
6051         struct cfg80211_registered_device *dev;
6052         struct wireless_dev *wdev;
6053         int survey_idx = cb->args[2];
6054         int res;
6055
6056         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
6057         if (res)
6058                 return res;
6059
6060         if (!wdev->netdev) {
6061                 res = -EINVAL;
6062                 goto out_err;
6063         }
6064
6065         if (!dev->ops->dump_survey) {
6066                 res = -EOPNOTSUPP;
6067                 goto out_err;
6068         }
6069
6070         while (1) {
6071                 struct ieee80211_channel *chan;
6072
6073                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
6074                 if (res == -ENOENT)
6075                         break;
6076                 if (res)
6077                         goto out_err;
6078
6079                 /* Survey without a channel doesn't make sense */
6080                 if (!survey.channel) {
6081                         res = -EINVAL;
6082                         goto out;
6083                 }
6084
6085                 chan = ieee80211_get_channel(&dev->wiphy,
6086                                              survey.channel->center_freq);
6087                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6088                         survey_idx++;
6089                         continue;
6090                 }
6091
6092                 if (nl80211_send_survey(skb,
6093                                 NETLINK_CB(cb->skb).portid,
6094                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6095                                 wdev->netdev, &survey) < 0)
6096                         goto out;
6097                 survey_idx++;
6098         }
6099
6100  out:
6101         cb->args[2] = survey_idx;
6102         res = skb->len;
6103  out_err:
6104         nl80211_finish_wdev_dump(dev);
6105         return res;
6106 }
6107
6108 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6109 {
6110         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6111                                   NL80211_WPA_VERSION_2));
6112 }
6113
6114 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6115 {
6116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6117         struct net_device *dev = info->user_ptr[1];
6118         struct ieee80211_channel *chan;
6119         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6120         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6121         enum nl80211_auth_type auth_type;
6122         struct key_parse key;
6123         bool local_state_change;
6124
6125         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6126                 return -EINVAL;
6127
6128         if (!info->attrs[NL80211_ATTR_MAC])
6129                 return -EINVAL;
6130
6131         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6132                 return -EINVAL;
6133
6134         if (!info->attrs[NL80211_ATTR_SSID])
6135                 return -EINVAL;
6136
6137         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6138                 return -EINVAL;
6139
6140         err = nl80211_parse_key(info, &key);
6141         if (err)
6142                 return err;
6143
6144         if (key.idx >= 0) {
6145                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6146                         return -EINVAL;
6147                 if (!key.p.key || !key.p.key_len)
6148                         return -EINVAL;
6149                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6150                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6151                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6152                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6153                         return -EINVAL;
6154                 if (key.idx > 4)
6155                         return -EINVAL;
6156         } else {
6157                 key.p.key_len = 0;
6158                 key.p.key = NULL;
6159         }
6160
6161         if (key.idx >= 0) {
6162                 int i;
6163                 bool ok = false;
6164                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6165                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6166                                 ok = true;
6167                                 break;
6168                         }
6169                 }
6170                 if (!ok)
6171                         return -EINVAL;
6172         }
6173
6174         if (!rdev->ops->auth)
6175                 return -EOPNOTSUPP;
6176
6177         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6178             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6179                 return -EOPNOTSUPP;
6180
6181         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6182         chan = ieee80211_get_channel(&rdev->wiphy,
6183                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6184         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6185                 return -EINVAL;
6186
6187         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6188         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6189
6190         if (info->attrs[NL80211_ATTR_IE]) {
6191                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6192                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6193         }
6194
6195         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6196         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6197                 return -EINVAL;
6198
6199         if (auth_type == NL80211_AUTHTYPE_SAE &&
6200             !info->attrs[NL80211_ATTR_SAE_DATA])
6201                 return -EINVAL;
6202
6203         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6204                 if (auth_type != NL80211_AUTHTYPE_SAE)
6205                         return -EINVAL;
6206                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6207                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6208                 /* need to include at least Auth Transaction and Status Code */
6209                 if (sae_data_len < 4)
6210                         return -EINVAL;
6211         }
6212
6213         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6214
6215         /*
6216          * Since we no longer track auth state, ignore
6217          * requests to only change local state.
6218          */
6219         if (local_state_change)
6220                 return 0;
6221
6222         wdev_lock(dev->ieee80211_ptr);
6223         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6224                                  ssid, ssid_len, ie, ie_len,
6225                                  key.p.key, key.p.key_len, key.idx,
6226                                  sae_data, sae_data_len);
6227         wdev_unlock(dev->ieee80211_ptr);
6228         return err;
6229 }
6230
6231 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6232                                    struct genl_info *info,
6233                                    struct cfg80211_crypto_settings *settings,
6234                                    int cipher_limit)
6235 {
6236         memset(settings, 0, sizeof(*settings));
6237
6238         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6239
6240         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6241                 u16 proto;
6242                 proto = nla_get_u16(
6243                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6244                 settings->control_port_ethertype = cpu_to_be16(proto);
6245                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6246                     proto != ETH_P_PAE)
6247                         return -EINVAL;
6248                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6249                         settings->control_port_no_encrypt = true;
6250         } else
6251                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6252
6253         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6254                 void *data;
6255                 int len, i;
6256
6257                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6258                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6259                 settings->n_ciphers_pairwise = len / sizeof(u32);
6260
6261                 if (len % sizeof(u32))
6262                         return -EINVAL;
6263
6264                 if (settings->n_ciphers_pairwise > cipher_limit)
6265                         return -EINVAL;
6266
6267                 memcpy(settings->ciphers_pairwise, data, len);
6268
6269                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6270                         if (!cfg80211_supported_cipher_suite(
6271                                         &rdev->wiphy,
6272                                         settings->ciphers_pairwise[i]))
6273                                 return -EINVAL;
6274         }
6275
6276         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6277                 settings->cipher_group =
6278                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6279                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6280                                                      settings->cipher_group))
6281                         return -EINVAL;
6282         }
6283
6284         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6285                 settings->wpa_versions =
6286                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6287                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6288                         return -EINVAL;
6289         }
6290
6291         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6292                 void *data;
6293                 int len;
6294
6295                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6296                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6297                 settings->n_akm_suites = len / sizeof(u32);
6298
6299                 if (len % sizeof(u32))
6300                         return -EINVAL;
6301
6302                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6303                         return -EINVAL;
6304
6305                 memcpy(settings->akm_suites, data, len);
6306         }
6307
6308         return 0;
6309 }
6310
6311 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6312 {
6313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6314         struct net_device *dev = info->user_ptr[1];
6315         struct ieee80211_channel *chan;
6316         struct cfg80211_assoc_request req = {};
6317         const u8 *bssid, *ssid;
6318         int err, ssid_len = 0;
6319
6320         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6321                 return -EINVAL;
6322
6323         if (!info->attrs[NL80211_ATTR_MAC] ||
6324             !info->attrs[NL80211_ATTR_SSID] ||
6325             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6326                 return -EINVAL;
6327
6328         if (!rdev->ops->assoc)
6329                 return -EOPNOTSUPP;
6330
6331         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6332             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6333                 return -EOPNOTSUPP;
6334
6335         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6336
6337         chan = ieee80211_get_channel(&rdev->wiphy,
6338                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6339         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6340                 return -EINVAL;
6341
6342         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6343         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6344
6345         if (info->attrs[NL80211_ATTR_IE]) {
6346                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6347                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6348         }
6349
6350         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6351                 enum nl80211_mfp mfp =
6352                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6353                 if (mfp == NL80211_MFP_REQUIRED)
6354                         req.use_mfp = true;
6355                 else if (mfp != NL80211_MFP_NO)
6356                         return -EINVAL;
6357         }
6358
6359         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6360                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6361
6362         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6363                 req.flags |= ASSOC_REQ_DISABLE_HT;
6364
6365         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6366                 memcpy(&req.ht_capa_mask,
6367                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6368                        sizeof(req.ht_capa_mask));
6369
6370         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6371                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6372                         return -EINVAL;
6373                 memcpy(&req.ht_capa,
6374                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6375                        sizeof(req.ht_capa));
6376         }
6377
6378         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6379                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6380
6381         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6382                 memcpy(&req.vht_capa_mask,
6383                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6384                        sizeof(req.vht_capa_mask));
6385
6386         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6387                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6388                         return -EINVAL;
6389                 memcpy(&req.vht_capa,
6390                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6391                        sizeof(req.vht_capa));
6392         }
6393
6394         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6395         if (!err) {
6396                 wdev_lock(dev->ieee80211_ptr);
6397                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6398                                           ssid, ssid_len, &req);
6399                 wdev_unlock(dev->ieee80211_ptr);
6400         }
6401
6402         return err;
6403 }
6404
6405 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6406 {
6407         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6408         struct net_device *dev = info->user_ptr[1];
6409         const u8 *ie = NULL, *bssid;
6410         int ie_len = 0, err;
6411         u16 reason_code;
6412         bool local_state_change;
6413
6414         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6415                 return -EINVAL;
6416
6417         if (!info->attrs[NL80211_ATTR_MAC])
6418                 return -EINVAL;
6419
6420         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6421                 return -EINVAL;
6422
6423         if (!rdev->ops->deauth)
6424                 return -EOPNOTSUPP;
6425
6426         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6427             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6428                 return -EOPNOTSUPP;
6429
6430         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6431
6432         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6433         if (reason_code == 0) {
6434                 /* Reason Code 0 is reserved */
6435                 return -EINVAL;
6436         }
6437
6438         if (info->attrs[NL80211_ATTR_IE]) {
6439                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6440                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6441         }
6442
6443         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6444
6445         wdev_lock(dev->ieee80211_ptr);
6446         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6447                                    local_state_change);
6448         wdev_unlock(dev->ieee80211_ptr);
6449         return err;
6450 }
6451
6452 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6453 {
6454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6455         struct net_device *dev = info->user_ptr[1];
6456         const u8 *ie = NULL, *bssid;
6457         int ie_len = 0, err;
6458         u16 reason_code;
6459         bool local_state_change;
6460
6461         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6462                 return -EINVAL;
6463
6464         if (!info->attrs[NL80211_ATTR_MAC])
6465                 return -EINVAL;
6466
6467         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6468                 return -EINVAL;
6469
6470         if (!rdev->ops->disassoc)
6471                 return -EOPNOTSUPP;
6472
6473         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6474             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6475                 return -EOPNOTSUPP;
6476
6477         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6478
6479         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6480         if (reason_code == 0) {
6481                 /* Reason Code 0 is reserved */
6482                 return -EINVAL;
6483         }
6484
6485         if (info->attrs[NL80211_ATTR_IE]) {
6486                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6487                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6488         }
6489
6490         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6491
6492         wdev_lock(dev->ieee80211_ptr);
6493         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6494                                      local_state_change);
6495         wdev_unlock(dev->ieee80211_ptr);
6496         return err;
6497 }
6498
6499 static bool
6500 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6501                          int mcast_rate[IEEE80211_NUM_BANDS],
6502                          int rateval)
6503 {
6504         struct wiphy *wiphy = &rdev->wiphy;
6505         bool found = false;
6506         int band, i;
6507
6508         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6509                 struct ieee80211_supported_band *sband;
6510
6511                 sband = wiphy->bands[band];
6512                 if (!sband)
6513                         continue;
6514
6515                 for (i = 0; i < sband->n_bitrates; i++) {
6516                         if (sband->bitrates[i].bitrate == rateval) {
6517                                 mcast_rate[band] = i + 1;
6518                                 found = true;
6519                                 break;
6520                         }
6521                 }
6522         }
6523
6524         return found;
6525 }
6526
6527 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6528 {
6529         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6530         struct net_device *dev = info->user_ptr[1];
6531         struct cfg80211_ibss_params ibss;
6532         struct wiphy *wiphy;
6533         struct cfg80211_cached_keys *connkeys = NULL;
6534         int err;
6535
6536         memset(&ibss, 0, sizeof(ibss));
6537
6538         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6539                 return -EINVAL;
6540
6541         if (!info->attrs[NL80211_ATTR_SSID] ||
6542             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6543                 return -EINVAL;
6544
6545         ibss.beacon_interval = 100;
6546
6547         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6548                 ibss.beacon_interval =
6549                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6550                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6551                         return -EINVAL;
6552         }
6553
6554         if (!rdev->ops->join_ibss)
6555                 return -EOPNOTSUPP;
6556
6557         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6558                 return -EOPNOTSUPP;
6559
6560         wiphy = &rdev->wiphy;
6561
6562         if (info->attrs[NL80211_ATTR_MAC]) {
6563                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6564
6565                 if (!is_valid_ether_addr(ibss.bssid))
6566                         return -EINVAL;
6567         }
6568         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6569         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6570
6571         if (info->attrs[NL80211_ATTR_IE]) {
6572                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6573                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6574         }
6575
6576         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6577         if (err)
6578                 return err;
6579
6580         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6581                 return -EINVAL;
6582
6583         switch (ibss.chandef.width) {
6584         case NL80211_CHAN_WIDTH_5:
6585         case NL80211_CHAN_WIDTH_10:
6586         case NL80211_CHAN_WIDTH_20_NOHT:
6587                 break;
6588         case NL80211_CHAN_WIDTH_20:
6589         case NL80211_CHAN_WIDTH_40:
6590                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6591                         break;
6592         default:
6593                 return -EINVAL;
6594         }
6595
6596         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6597         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6598
6599         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6600                 u8 *rates =
6601                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6602                 int n_rates =
6603                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6604                 struct ieee80211_supported_band *sband =
6605                         wiphy->bands[ibss.chandef.chan->band];
6606
6607                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6608                                              &ibss.basic_rates);
6609                 if (err)
6610                         return err;
6611         }
6612
6613         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6614                 memcpy(&ibss.ht_capa_mask,
6615                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6616                        sizeof(ibss.ht_capa_mask));
6617
6618         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6619                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6620                         return -EINVAL;
6621                 memcpy(&ibss.ht_capa,
6622                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6623                        sizeof(ibss.ht_capa));
6624         }
6625
6626         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6627             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6628                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6629                 return -EINVAL;
6630
6631         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6632                 bool no_ht = false;
6633
6634                 connkeys = nl80211_parse_connkeys(rdev,
6635                                           info->attrs[NL80211_ATTR_KEYS],
6636                                           &no_ht);
6637                 if (IS_ERR(connkeys))
6638                         return PTR_ERR(connkeys);
6639
6640                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6641                     no_ht) {
6642                         kfree(connkeys);
6643                         return -EINVAL;
6644                 }
6645         }
6646
6647         ibss.control_port =
6648                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6649
6650         ibss.userspace_handles_dfs =
6651                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6652
6653         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6654         if (err)
6655                 kfree(connkeys);
6656         return err;
6657 }
6658
6659 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6660 {
6661         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6662         struct net_device *dev = info->user_ptr[1];
6663
6664         if (!rdev->ops->leave_ibss)
6665                 return -EOPNOTSUPP;
6666
6667         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6668                 return -EOPNOTSUPP;
6669
6670         return cfg80211_leave_ibss(rdev, dev, false);
6671 }
6672
6673 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6674 {
6675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6676         struct net_device *dev = info->user_ptr[1];
6677         int mcast_rate[IEEE80211_NUM_BANDS];
6678         u32 nla_rate;
6679         int err;
6680
6681         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6682             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6683                 return -EOPNOTSUPP;
6684
6685         if (!rdev->ops->set_mcast_rate)
6686                 return -EOPNOTSUPP;
6687
6688         memset(mcast_rate, 0, sizeof(mcast_rate));
6689
6690         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6691                 return -EINVAL;
6692
6693         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6694         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6695                 return -EINVAL;
6696
6697         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6698
6699         return err;
6700 }
6701
6702 static struct sk_buff *
6703 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6704                             int approxlen, u32 portid, u32 seq,
6705                             enum nl80211_commands cmd,
6706                             enum nl80211_attrs attr, gfp_t gfp)
6707 {
6708         struct sk_buff *skb;
6709         void *hdr;
6710         struct nlattr *data;
6711
6712         skb = nlmsg_new(approxlen + 100, gfp);
6713         if (!skb)
6714                 return NULL;
6715
6716         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6717         if (!hdr) {
6718                 kfree_skb(skb);
6719                 return NULL;
6720         }
6721
6722         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6723                 goto nla_put_failure;
6724         data = nla_nest_start(skb, attr);
6725
6726         ((void **)skb->cb)[0] = rdev;
6727         ((void **)skb->cb)[1] = hdr;
6728         ((void **)skb->cb)[2] = data;
6729
6730         return skb;
6731
6732  nla_put_failure:
6733         kfree_skb(skb);
6734         return NULL;
6735 }
6736
6737 #ifdef CONFIG_NL80211_TESTMODE
6738 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6739         .name = "testmode",
6740 };
6741
6742 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6743 {
6744         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6745         struct wireless_dev *wdev =
6746                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6747         int err;
6748
6749         if (!rdev->ops->testmode_cmd)
6750                 return -EOPNOTSUPP;
6751
6752         if (IS_ERR(wdev)) {
6753                 err = PTR_ERR(wdev);
6754                 if (err != -EINVAL)
6755                         return err;
6756                 wdev = NULL;
6757         } else if (wdev->wiphy != &rdev->wiphy) {
6758                 return -EINVAL;
6759         }
6760
6761         if (!info->attrs[NL80211_ATTR_TESTDATA])
6762                 return -EINVAL;
6763
6764         rdev->cur_cmd_info = info;
6765         err = rdev_testmode_cmd(rdev, wdev,
6766                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6767                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6768         rdev->cur_cmd_info = NULL;
6769
6770         return err;
6771 }
6772
6773 static int nl80211_testmode_dump(struct sk_buff *skb,
6774                                  struct netlink_callback *cb)
6775 {
6776         struct cfg80211_registered_device *rdev;
6777         int err;
6778         long phy_idx;
6779         void *data = NULL;
6780         int data_len = 0;
6781
6782         rtnl_lock();
6783
6784         if (cb->args[0]) {
6785                 /*
6786                  * 0 is a valid index, but not valid for args[0],
6787                  * so we need to offset by 1.
6788                  */
6789                 phy_idx = cb->args[0] - 1;
6790         } else {
6791                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6792                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6793                                   nl80211_policy);
6794                 if (err)
6795                         goto out_err;
6796
6797                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6798                                                   nl80211_fam.attrbuf);
6799                 if (IS_ERR(rdev)) {
6800                         err = PTR_ERR(rdev);
6801                         goto out_err;
6802                 }
6803                 phy_idx = rdev->wiphy_idx;
6804                 rdev = NULL;
6805
6806                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6807                         cb->args[1] =
6808                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6809         }
6810
6811         if (cb->args[1]) {
6812                 data = nla_data((void *)cb->args[1]);
6813                 data_len = nla_len((void *)cb->args[1]);
6814         }
6815
6816         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6817         if (!rdev) {
6818                 err = -ENOENT;
6819                 goto out_err;
6820         }
6821
6822         if (!rdev->ops->testmode_dump) {
6823                 err = -EOPNOTSUPP;
6824                 goto out_err;
6825         }
6826
6827         while (1) {
6828                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6829                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6830                                            NL80211_CMD_TESTMODE);
6831                 struct nlattr *tmdata;
6832
6833                 if (!hdr)
6834                         break;
6835
6836                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6837                         genlmsg_cancel(skb, hdr);
6838                         break;
6839                 }
6840
6841                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6842                 if (!tmdata) {
6843                         genlmsg_cancel(skb, hdr);
6844                         break;
6845                 }
6846                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6847                 nla_nest_end(skb, tmdata);
6848
6849                 if (err == -ENOBUFS || err == -ENOENT) {
6850                         genlmsg_cancel(skb, hdr);
6851                         break;
6852                 } else if (err) {
6853                         genlmsg_cancel(skb, hdr);
6854                         goto out_err;
6855                 }
6856
6857                 genlmsg_end(skb, hdr);
6858         }
6859
6860         err = skb->len;
6861         /* see above */
6862         cb->args[0] = phy_idx + 1;
6863  out_err:
6864         rtnl_unlock();
6865         return err;
6866 }
6867
6868 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6869                                                   int approxlen, gfp_t gfp)
6870 {
6871         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6872
6873         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6874                                            NL80211_CMD_TESTMODE,
6875                                            NL80211_ATTR_TESTDATA, gfp);
6876 }
6877 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6878
6879 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6880 {
6881         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6882         void *hdr = ((void **)skb->cb)[1];
6883         struct nlattr *data = ((void **)skb->cb)[2];
6884
6885         nla_nest_end(skb, data);
6886         genlmsg_end(skb, hdr);
6887         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6888                                 nl80211_testmode_mcgrp.id, gfp);
6889 }
6890 EXPORT_SYMBOL(cfg80211_testmode_event);
6891 #endif
6892
6893 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6894 {
6895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6896         struct net_device *dev = info->user_ptr[1];
6897         struct cfg80211_connect_params connect;
6898         struct wiphy *wiphy;
6899         struct cfg80211_cached_keys *connkeys = NULL;
6900         int err;
6901
6902         memset(&connect, 0, sizeof(connect));
6903
6904         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6905                 return -EINVAL;
6906
6907         if (!info->attrs[NL80211_ATTR_SSID] ||
6908             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6909                 return -EINVAL;
6910
6911         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6912                 connect.auth_type =
6913                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6914                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6915                                              NL80211_CMD_CONNECT))
6916                         return -EINVAL;
6917         } else
6918                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6919
6920         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6921
6922         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6923                                       NL80211_MAX_NR_CIPHER_SUITES);
6924         if (err)
6925                 return err;
6926
6927         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6928             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6929                 return -EOPNOTSUPP;
6930
6931         wiphy = &rdev->wiphy;
6932
6933         connect.bg_scan_period = -1;
6934         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6935                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6936                 connect.bg_scan_period =
6937                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6938         }
6939
6940         if (info->attrs[NL80211_ATTR_MAC])
6941                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6942         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6943         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6944
6945         if (info->attrs[NL80211_ATTR_IE]) {
6946                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6947                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6948         }
6949
6950         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6951                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6952                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6953                     connect.mfp != NL80211_MFP_NO)
6954                         return -EINVAL;
6955         } else {
6956                 connect.mfp = NL80211_MFP_NO;
6957         }
6958
6959         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6960                 connect.channel =
6961                         ieee80211_get_channel(wiphy,
6962                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6963                 if (!connect.channel ||
6964                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6965                         return -EINVAL;
6966         }
6967
6968         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6969                 connkeys = nl80211_parse_connkeys(rdev,
6970                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6971                 if (IS_ERR(connkeys))
6972                         return PTR_ERR(connkeys);
6973         }
6974
6975         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6976                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6977
6978         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6979                 memcpy(&connect.ht_capa_mask,
6980                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6981                        sizeof(connect.ht_capa_mask));
6982
6983         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6984                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6985                         kfree(connkeys);
6986                         return -EINVAL;
6987                 }
6988                 memcpy(&connect.ht_capa,
6989                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6990                        sizeof(connect.ht_capa));
6991         }
6992
6993         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6994                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6995
6996         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6997                 memcpy(&connect.vht_capa_mask,
6998                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6999                        sizeof(connect.vht_capa_mask));
7000
7001         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7002                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7003                         kfree(connkeys);
7004                         return -EINVAL;
7005                 }
7006                 memcpy(&connect.vht_capa,
7007                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7008                        sizeof(connect.vht_capa));
7009         }
7010
7011         wdev_lock(dev->ieee80211_ptr);
7012         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7013         wdev_unlock(dev->ieee80211_ptr);
7014         if (err)
7015                 kfree(connkeys);
7016         return err;
7017 }
7018
7019 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7020 {
7021         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7022         struct net_device *dev = info->user_ptr[1];
7023         u16 reason;
7024         int ret;
7025
7026         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7027                 reason = WLAN_REASON_DEAUTH_LEAVING;
7028         else
7029                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7030
7031         if (reason == 0)
7032                 return -EINVAL;
7033
7034         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7035             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7036                 return -EOPNOTSUPP;
7037
7038         wdev_lock(dev->ieee80211_ptr);
7039         ret = cfg80211_disconnect(rdev, dev, reason, true);
7040         wdev_unlock(dev->ieee80211_ptr);
7041         return ret;
7042 }
7043
7044 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7045 {
7046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7047         struct net *net;
7048         int err;
7049         u32 pid;
7050
7051         if (!info->attrs[NL80211_ATTR_PID])
7052                 return -EINVAL;
7053
7054         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7055
7056         net = get_net_ns_by_pid(pid);
7057         if (IS_ERR(net))
7058                 return PTR_ERR(net);
7059
7060         err = 0;
7061
7062         /* check if anything to do */
7063         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7064                 err = cfg80211_switch_netns(rdev, net);
7065
7066         put_net(net);
7067         return err;
7068 }
7069
7070 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7071 {
7072         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7073         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7074                         struct cfg80211_pmksa *pmksa) = NULL;
7075         struct net_device *dev = info->user_ptr[1];
7076         struct cfg80211_pmksa pmksa;
7077
7078         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7079
7080         if (!info->attrs[NL80211_ATTR_MAC])
7081                 return -EINVAL;
7082
7083         if (!info->attrs[NL80211_ATTR_PMKID])
7084                 return -EINVAL;
7085
7086         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7087         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7088
7089         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7090             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7091                 return -EOPNOTSUPP;
7092
7093         switch (info->genlhdr->cmd) {
7094         case NL80211_CMD_SET_PMKSA:
7095                 rdev_ops = rdev->ops->set_pmksa;
7096                 break;
7097         case NL80211_CMD_DEL_PMKSA:
7098                 rdev_ops = rdev->ops->del_pmksa;
7099                 break;
7100         default:
7101                 WARN_ON(1);
7102                 break;
7103         }
7104
7105         if (!rdev_ops)
7106                 return -EOPNOTSUPP;
7107
7108         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7109 }
7110
7111 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7112 {
7113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7114         struct net_device *dev = info->user_ptr[1];
7115
7116         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7117             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7118                 return -EOPNOTSUPP;
7119
7120         if (!rdev->ops->flush_pmksa)
7121                 return -EOPNOTSUPP;
7122
7123         return rdev_flush_pmksa(rdev, dev);
7124 }
7125
7126 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7127 {
7128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7129         struct net_device *dev = info->user_ptr[1];
7130         u8 action_code, dialog_token;
7131         u16 status_code;
7132         u8 *peer;
7133
7134         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7135             !rdev->ops->tdls_mgmt)
7136                 return -EOPNOTSUPP;
7137
7138         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7139             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7140             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7141             !info->attrs[NL80211_ATTR_IE] ||
7142             !info->attrs[NL80211_ATTR_MAC])
7143                 return -EINVAL;
7144
7145         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7146         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7147         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7148         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7149
7150         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7151                               dialog_token, status_code,
7152                               nla_data(info->attrs[NL80211_ATTR_IE]),
7153                               nla_len(info->attrs[NL80211_ATTR_IE]));
7154 }
7155
7156 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7157 {
7158         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7159         struct net_device *dev = info->user_ptr[1];
7160         enum nl80211_tdls_operation operation;
7161         u8 *peer;
7162
7163         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7164             !rdev->ops->tdls_oper)
7165                 return -EOPNOTSUPP;
7166
7167         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7168             !info->attrs[NL80211_ATTR_MAC])
7169                 return -EINVAL;
7170
7171         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7172         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7173
7174         return rdev_tdls_oper(rdev, dev, peer, operation);
7175 }
7176
7177 static int nl80211_remain_on_channel(struct sk_buff *skb,
7178                                      struct genl_info *info)
7179 {
7180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7181         struct wireless_dev *wdev = info->user_ptr[1];
7182         struct cfg80211_chan_def chandef;
7183         struct sk_buff *msg;
7184         void *hdr;
7185         u64 cookie;
7186         u32 duration;
7187         int err;
7188
7189         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7190             !info->attrs[NL80211_ATTR_DURATION])
7191                 return -EINVAL;
7192
7193         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7194
7195         if (!rdev->ops->remain_on_channel ||
7196             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7197                 return -EOPNOTSUPP;
7198
7199         /*
7200          * We should be on that channel for at least a minimum amount of
7201          * time (10ms) but no longer than the driver supports.
7202          */
7203         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7204             duration > rdev->wiphy.max_remain_on_channel_duration)
7205                 return -EINVAL;
7206
7207         err = nl80211_parse_chandef(rdev, info, &chandef);
7208         if (err)
7209                 return err;
7210
7211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7212         if (!msg)
7213                 return -ENOMEM;
7214
7215         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7216                              NL80211_CMD_REMAIN_ON_CHANNEL);
7217         if (!hdr) {
7218                 err = -ENOBUFS;
7219                 goto free_msg;
7220         }
7221
7222         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7223                                      duration, &cookie);
7224
7225         if (err)
7226                 goto free_msg;
7227
7228         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7229                 goto nla_put_failure;
7230
7231         genlmsg_end(msg, hdr);
7232
7233         return genlmsg_reply(msg, info);
7234
7235  nla_put_failure:
7236         err = -ENOBUFS;
7237  free_msg:
7238         nlmsg_free(msg);
7239         return err;
7240 }
7241
7242 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7243                                             struct genl_info *info)
7244 {
7245         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7246         struct wireless_dev *wdev = info->user_ptr[1];
7247         u64 cookie;
7248
7249         if (!info->attrs[NL80211_ATTR_COOKIE])
7250                 return -EINVAL;
7251
7252         if (!rdev->ops->cancel_remain_on_channel)
7253                 return -EOPNOTSUPP;
7254
7255         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7256
7257         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7258 }
7259
7260 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7261                            u8 *rates, u8 rates_len)
7262 {
7263         u8 i;
7264         u32 mask = 0;
7265
7266         for (i = 0; i < rates_len; i++) {
7267                 int rate = (rates[i] & 0x7f) * 5;
7268                 int ridx;
7269                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7270                         struct ieee80211_rate *srate =
7271                                 &sband->bitrates[ridx];
7272                         if (rate == srate->bitrate) {
7273                                 mask |= 1 << ridx;
7274                                 break;
7275                         }
7276                 }
7277                 if (ridx == sband->n_bitrates)
7278                         return 0; /* rate not found */
7279         }
7280
7281         return mask;
7282 }
7283
7284 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7285                                u8 *rates, u8 rates_len,
7286                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7287 {
7288         u8 i;
7289
7290         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7291
7292         for (i = 0; i < rates_len; i++) {
7293                 int ridx, rbit;
7294
7295                 ridx = rates[i] / 8;
7296                 rbit = BIT(rates[i] % 8);
7297
7298                 /* check validity */
7299                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7300                         return false;
7301
7302                 /* check availability */
7303                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7304                         mcs[ridx] |= rbit;
7305                 else
7306                         return false;
7307         }
7308
7309         return true;
7310 }
7311
7312 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7313         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7314                                     .len = NL80211_MAX_SUPP_RATES },
7315         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7316                                 .len = NL80211_MAX_SUPP_HT_RATES },
7317 };
7318
7319 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7320                                        struct genl_info *info)
7321 {
7322         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7324         struct cfg80211_bitrate_mask mask;
7325         int rem, i;
7326         struct net_device *dev = info->user_ptr[1];
7327         struct nlattr *tx_rates;
7328         struct ieee80211_supported_band *sband;
7329
7330         if (!rdev->ops->set_bitrate_mask)
7331                 return -EOPNOTSUPP;
7332
7333         memset(&mask, 0, sizeof(mask));
7334         /* Default to all rates enabled */
7335         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7336                 sband = rdev->wiphy.bands[i];
7337
7338                 if (!sband)
7339                         continue;
7340
7341                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7342                 memcpy(mask.control[i].ht_mcs,
7343                        sband->ht_cap.mcs.rx_mask,
7344                        sizeof(mask.control[i].ht_mcs));
7345         }
7346
7347         /* if no rates are given set it back to the defaults */
7348         if (!info->attrs[NL80211_ATTR_TX_RATES])
7349                 goto out;
7350
7351         /*
7352          * The nested attribute uses enum nl80211_band as the index. This maps
7353          * directly to the enum ieee80211_band values used in cfg80211.
7354          */
7355         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7356         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7357         {
7358                 enum ieee80211_band band = nla_type(tx_rates);
7359                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7360                         return -EINVAL;
7361                 sband = rdev->wiphy.bands[band];
7362                 if (sband == NULL)
7363                         return -EINVAL;
7364                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7365                           nla_len(tx_rates), nl80211_txattr_policy);
7366                 if (tb[NL80211_TXRATE_LEGACY]) {
7367                         mask.control[band].legacy = rateset_to_mask(
7368                                 sband,
7369                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7370                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7371                         if ((mask.control[band].legacy == 0) &&
7372                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7373                                 return -EINVAL;
7374                 }
7375                 if (tb[NL80211_TXRATE_HT]) {
7376                         if (!ht_rateset_to_mask(
7377                                         sband,
7378                                         nla_data(tb[NL80211_TXRATE_HT]),
7379                                         nla_len(tb[NL80211_TXRATE_HT]),
7380                                         mask.control[band].ht_mcs))
7381                                 return -EINVAL;
7382                 }
7383
7384                 if (mask.control[band].legacy == 0) {
7385                         /* don't allow empty legacy rates if HT
7386                          * is not even supported. */
7387                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7388                                 return -EINVAL;
7389
7390                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7391                                 if (mask.control[band].ht_mcs[i])
7392                                         break;
7393
7394                         /* legacy and mcs rates may not be both empty */
7395                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7396                                 return -EINVAL;
7397                 }
7398         }
7399
7400 out:
7401         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7402 }
7403
7404 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7405 {
7406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7407         struct wireless_dev *wdev = info->user_ptr[1];
7408         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7409
7410         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7411                 return -EINVAL;
7412
7413         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7414                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7415
7416         switch (wdev->iftype) {
7417         case NL80211_IFTYPE_STATION:
7418         case NL80211_IFTYPE_ADHOC:
7419         case NL80211_IFTYPE_P2P_CLIENT:
7420         case NL80211_IFTYPE_AP:
7421         case NL80211_IFTYPE_AP_VLAN:
7422         case NL80211_IFTYPE_MESH_POINT:
7423         case NL80211_IFTYPE_P2P_GO:
7424         case NL80211_IFTYPE_P2P_DEVICE:
7425                 break;
7426         default:
7427                 return -EOPNOTSUPP;
7428         }
7429
7430         /* not much point in registering if we can't reply */
7431         if (!rdev->ops->mgmt_tx)
7432                 return -EOPNOTSUPP;
7433
7434         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7435                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7436                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7437 }
7438
7439 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7440 {
7441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7442         struct wireless_dev *wdev = info->user_ptr[1];
7443         struct cfg80211_chan_def chandef;
7444         int err;
7445         void *hdr = NULL;
7446         u64 cookie;
7447         struct sk_buff *msg = NULL;
7448         struct cfg80211_mgmt_tx_params params = {
7449                 .dont_wait_for_ack =
7450                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7451         };
7452
7453         if (!info->attrs[NL80211_ATTR_FRAME])
7454                 return -EINVAL;
7455
7456         if (!rdev->ops->mgmt_tx)
7457                 return -EOPNOTSUPP;
7458
7459         switch (wdev->iftype) {
7460         case NL80211_IFTYPE_P2P_DEVICE:
7461                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7462                         return -EINVAL;
7463         case NL80211_IFTYPE_STATION:
7464         case NL80211_IFTYPE_ADHOC:
7465         case NL80211_IFTYPE_P2P_CLIENT:
7466         case NL80211_IFTYPE_AP:
7467         case NL80211_IFTYPE_AP_VLAN:
7468         case NL80211_IFTYPE_MESH_POINT:
7469         case NL80211_IFTYPE_P2P_GO:
7470                 break;
7471         default:
7472                 return -EOPNOTSUPP;
7473         }
7474
7475         if (info->attrs[NL80211_ATTR_DURATION]) {
7476                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7477                         return -EINVAL;
7478                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7479
7480                 /*
7481                  * We should wait on the channel for at least a minimum amount
7482                  * of time (10ms) but no longer than the driver supports.
7483                  */
7484                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7485                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7486                         return -EINVAL;
7487
7488         }
7489
7490         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7491
7492         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7493                 return -EINVAL;
7494
7495         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7496
7497         /* get the channel if any has been specified, otherwise pass NULL to
7498          * the driver. The latter will use the current one
7499          */
7500         chandef.chan = NULL;
7501         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7502                 err = nl80211_parse_chandef(rdev, info, &chandef);
7503                 if (err)
7504                         return err;
7505         }
7506
7507         if (!chandef.chan && params.offchan)
7508                 return -EINVAL;
7509
7510         if (!params.dont_wait_for_ack) {
7511                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7512                 if (!msg)
7513                         return -ENOMEM;
7514
7515                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7516                                      NL80211_CMD_FRAME);
7517                 if (!hdr) {
7518                         err = -ENOBUFS;
7519                         goto free_msg;
7520                 }
7521         }
7522
7523         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7524         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7525         params.chan = chandef.chan;
7526         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7527         if (err)
7528                 goto free_msg;
7529
7530         if (msg) {
7531                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7532                         goto nla_put_failure;
7533
7534                 genlmsg_end(msg, hdr);
7535                 return genlmsg_reply(msg, info);
7536         }
7537
7538         return 0;
7539
7540  nla_put_failure:
7541         err = -ENOBUFS;
7542  free_msg:
7543         nlmsg_free(msg);
7544         return err;
7545 }
7546
7547 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7548 {
7549         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7550         struct wireless_dev *wdev = info->user_ptr[1];
7551         u64 cookie;
7552
7553         if (!info->attrs[NL80211_ATTR_COOKIE])
7554                 return -EINVAL;
7555
7556         if (!rdev->ops->mgmt_tx_cancel_wait)
7557                 return -EOPNOTSUPP;
7558
7559         switch (wdev->iftype) {
7560         case NL80211_IFTYPE_STATION:
7561         case NL80211_IFTYPE_ADHOC:
7562         case NL80211_IFTYPE_P2P_CLIENT:
7563         case NL80211_IFTYPE_AP:
7564         case NL80211_IFTYPE_AP_VLAN:
7565         case NL80211_IFTYPE_P2P_GO:
7566         case NL80211_IFTYPE_P2P_DEVICE:
7567                 break;
7568         default:
7569                 return -EOPNOTSUPP;
7570         }
7571
7572         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7573
7574         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7575 }
7576
7577 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7578 {
7579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7580         struct wireless_dev *wdev;
7581         struct net_device *dev = info->user_ptr[1];
7582         u8 ps_state;
7583         bool state;
7584         int err;
7585
7586         if (!info->attrs[NL80211_ATTR_PS_STATE])
7587                 return -EINVAL;
7588
7589         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7590
7591         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7592                 return -EINVAL;
7593
7594         wdev = dev->ieee80211_ptr;
7595
7596         if (!rdev->ops->set_power_mgmt)
7597                 return -EOPNOTSUPP;
7598
7599         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7600
7601         if (state == wdev->ps)
7602                 return 0;
7603
7604         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7605         if (!err)
7606                 wdev->ps = state;
7607         return err;
7608 }
7609
7610 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7611 {
7612         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7613         enum nl80211_ps_state ps_state;
7614         struct wireless_dev *wdev;
7615         struct net_device *dev = info->user_ptr[1];
7616         struct sk_buff *msg;
7617         void *hdr;
7618         int err;
7619
7620         wdev = dev->ieee80211_ptr;
7621
7622         if (!rdev->ops->set_power_mgmt)
7623                 return -EOPNOTSUPP;
7624
7625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7626         if (!msg)
7627                 return -ENOMEM;
7628
7629         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7630                              NL80211_CMD_GET_POWER_SAVE);
7631         if (!hdr) {
7632                 err = -ENOBUFS;
7633                 goto free_msg;
7634         }
7635
7636         if (wdev->ps)
7637                 ps_state = NL80211_PS_ENABLED;
7638         else
7639                 ps_state = NL80211_PS_DISABLED;
7640
7641         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7642                 goto nla_put_failure;
7643
7644         genlmsg_end(msg, hdr);
7645         return genlmsg_reply(msg, info);
7646
7647  nla_put_failure:
7648         err = -ENOBUFS;
7649  free_msg:
7650         nlmsg_free(msg);
7651         return err;
7652 }
7653
7654 static struct nla_policy
7655 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7656         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7657         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7658         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7659         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7660         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7661         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7662 };
7663
7664 static int nl80211_set_cqm_txe(struct genl_info *info,
7665                                u32 rate, u32 pkts, u32 intvl)
7666 {
7667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7668         struct net_device *dev = info->user_ptr[1];
7669         struct wireless_dev *wdev = dev->ieee80211_ptr;
7670
7671         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7672                 return -EINVAL;
7673
7674         if (!rdev->ops->set_cqm_txe_config)
7675                 return -EOPNOTSUPP;
7676
7677         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7678             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7679                 return -EOPNOTSUPP;
7680
7681         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7682 }
7683
7684 static int nl80211_set_cqm_rssi(struct genl_info *info,
7685                                 s32 threshold, u32 hysteresis)
7686 {
7687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7688         struct net_device *dev = info->user_ptr[1];
7689         struct wireless_dev *wdev = dev->ieee80211_ptr;
7690
7691         if (threshold > 0)
7692                 return -EINVAL;
7693
7694         /* disabling - hysteresis should also be zero then */
7695         if (threshold == 0)
7696                 hysteresis = 0;
7697
7698         if (!rdev->ops->set_cqm_rssi_config)
7699                 return -EOPNOTSUPP;
7700
7701         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7702             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7703                 return -EOPNOTSUPP;
7704
7705         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7706 }
7707
7708 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7709 {
7710         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7711         struct nlattr *cqm;
7712         int err;
7713
7714         cqm = info->attrs[NL80211_ATTR_CQM];
7715         if (!cqm)
7716                 return -EINVAL;
7717
7718         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7719                                nl80211_attr_cqm_policy);
7720         if (err)
7721                 return err;
7722
7723         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7724             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7725                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7726                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7727
7728                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7729         }
7730
7731         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7732             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7733             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7734                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7735                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7736                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7737
7738                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7739         }
7740
7741         return -EINVAL;
7742 }
7743
7744 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7745 {
7746         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7747         struct net_device *dev = info->user_ptr[1];
7748         struct mesh_config cfg;
7749         struct mesh_setup setup;
7750         int err;
7751
7752         /* start with default */
7753         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7754         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7755
7756         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7757                 /* and parse parameters if given */
7758                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7759                 if (err)
7760                         return err;
7761         }
7762
7763         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7764             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7765                 return -EINVAL;
7766
7767         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7768         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7769
7770         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7771             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7772                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7773                         return -EINVAL;
7774
7775         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7776                 setup.beacon_interval =
7777                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7778                 if (setup.beacon_interval < 10 ||
7779                     setup.beacon_interval > 10000)
7780                         return -EINVAL;
7781         }
7782
7783         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7784                 setup.dtim_period =
7785                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7786                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7787                         return -EINVAL;
7788         }
7789
7790         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7791                 /* parse additional setup parameters if given */
7792                 err = nl80211_parse_mesh_setup(info, &setup);
7793                 if (err)
7794                         return err;
7795         }
7796
7797         if (setup.user_mpm)
7798                 cfg.auto_open_plinks = false;
7799
7800         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7801                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7802                 if (err)
7803                         return err;
7804         } else {
7805                 /* cfg80211_join_mesh() will sort it out */
7806                 setup.chandef.chan = NULL;
7807         }
7808
7809         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7810                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7811                 int n_rates =
7812                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7813                 struct ieee80211_supported_band *sband;
7814
7815                 if (!setup.chandef.chan)
7816                         return -EINVAL;
7817
7818                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7819
7820                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7821                                              &setup.basic_rates);
7822                 if (err)
7823                         return err;
7824         }
7825
7826         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7827 }
7828
7829 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7830 {
7831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7832         struct net_device *dev = info->user_ptr[1];
7833
7834         return cfg80211_leave_mesh(rdev, dev);
7835 }
7836
7837 #ifdef CONFIG_PM
7838 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7839                                         struct cfg80211_registered_device *rdev)
7840 {
7841         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7842         struct nlattr *nl_pats, *nl_pat;
7843         int i, pat_len;
7844
7845         if (!wowlan->n_patterns)
7846                 return 0;
7847
7848         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7849         if (!nl_pats)
7850                 return -ENOBUFS;
7851
7852         for (i = 0; i < wowlan->n_patterns; i++) {
7853                 nl_pat = nla_nest_start(msg, i + 1);
7854                 if (!nl_pat)
7855                         return -ENOBUFS;
7856                 pat_len = wowlan->patterns[i].pattern_len;
7857                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7858                             wowlan->patterns[i].mask) ||
7859                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7860                             wowlan->patterns[i].pattern) ||
7861                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7862                                 wowlan->patterns[i].pkt_offset))
7863                         return -ENOBUFS;
7864                 nla_nest_end(msg, nl_pat);
7865         }
7866         nla_nest_end(msg, nl_pats);
7867
7868         return 0;
7869 }
7870
7871 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7872                                    struct cfg80211_wowlan_tcp *tcp)
7873 {
7874         struct nlattr *nl_tcp;
7875
7876         if (!tcp)
7877                 return 0;
7878
7879         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7880         if (!nl_tcp)
7881                 return -ENOBUFS;
7882
7883         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7884             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7885             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7886             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7887             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7888             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7889                     tcp->payload_len, tcp->payload) ||
7890             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7891                         tcp->data_interval) ||
7892             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7893                     tcp->wake_len, tcp->wake_data) ||
7894             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7895                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7896                 return -ENOBUFS;
7897
7898         if (tcp->payload_seq.len &&
7899             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7900                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7901                 return -ENOBUFS;
7902
7903         if (tcp->payload_tok.len &&
7904             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7905                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7906                     &tcp->payload_tok))
7907                 return -ENOBUFS;
7908
7909         nla_nest_end(msg, nl_tcp);
7910
7911         return 0;
7912 }
7913
7914 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7915 {
7916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7917         struct sk_buff *msg;
7918         void *hdr;
7919         u32 size = NLMSG_DEFAULT_SIZE;
7920
7921         if (!rdev->wiphy.wowlan)
7922                 return -EOPNOTSUPP;
7923
7924         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7925                 /* adjust size to have room for all the data */
7926                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7927                         rdev->wiphy.wowlan_config->tcp->payload_len +
7928                         rdev->wiphy.wowlan_config->tcp->wake_len +
7929                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7930         }
7931
7932         msg = nlmsg_new(size, GFP_KERNEL);
7933         if (!msg)
7934                 return -ENOMEM;
7935
7936         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7937                              NL80211_CMD_GET_WOWLAN);
7938         if (!hdr)
7939                 goto nla_put_failure;
7940
7941         if (rdev->wiphy.wowlan_config) {
7942                 struct nlattr *nl_wowlan;
7943
7944                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7945                 if (!nl_wowlan)
7946                         goto nla_put_failure;
7947
7948                 if ((rdev->wiphy.wowlan_config->any &&
7949                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7950                     (rdev->wiphy.wowlan_config->disconnect &&
7951                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7952                     (rdev->wiphy.wowlan_config->magic_pkt &&
7953                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7954                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7955                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7956                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7957                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7958                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7959                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7960                     (rdev->wiphy.wowlan_config->rfkill_release &&
7961                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7962                         goto nla_put_failure;
7963
7964                 if (nl80211_send_wowlan_patterns(msg, rdev))
7965                         goto nla_put_failure;
7966
7967                 if (nl80211_send_wowlan_tcp(msg,
7968                                             rdev->wiphy.wowlan_config->tcp))
7969                         goto nla_put_failure;
7970
7971                 nla_nest_end(msg, nl_wowlan);
7972         }
7973
7974         genlmsg_end(msg, hdr);
7975         return genlmsg_reply(msg, info);
7976
7977 nla_put_failure:
7978         nlmsg_free(msg);
7979         return -ENOBUFS;
7980 }
7981
7982 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7983                                     struct nlattr *attr,
7984                                     struct cfg80211_wowlan *trig)
7985 {
7986         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7987         struct cfg80211_wowlan_tcp *cfg;
7988         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7989         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7990         u32 size;
7991         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7992         int err, port;
7993
7994         if (!rdev->wiphy.wowlan->tcp)
7995                 return -EINVAL;
7996
7997         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7998                         nla_data(attr), nla_len(attr),
7999                         nl80211_wowlan_tcp_policy);
8000         if (err)
8001                 return err;
8002
8003         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8004             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8005             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8006             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8007             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8008             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8009             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8010             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8011                 return -EINVAL;
8012
8013         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8014         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8015                 return -EINVAL;
8016
8017         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8018                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8019             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8020                 return -EINVAL;
8021
8022         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8023         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8024                 return -EINVAL;
8025
8026         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8027         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8028                 return -EINVAL;
8029
8030         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8031                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8032
8033                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8034                 tokens_size = tokln - sizeof(*tok);
8035
8036                 if (!tok->len || tokens_size % tok->len)
8037                         return -EINVAL;
8038                 if (!rdev->wiphy.wowlan->tcp->tok)
8039                         return -EINVAL;
8040                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8041                         return -EINVAL;
8042                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8043                         return -EINVAL;
8044                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8045                         return -EINVAL;
8046                 if (tok->offset + tok->len > data_size)
8047                         return -EINVAL;
8048         }
8049
8050         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8051                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8052                 if (!rdev->wiphy.wowlan->tcp->seq)
8053                         return -EINVAL;
8054                 if (seq->len == 0 || seq->len > 4)
8055                         return -EINVAL;
8056                 if (seq->len + seq->offset > data_size)
8057                         return -EINVAL;
8058         }
8059
8060         size = sizeof(*cfg);
8061         size += data_size;
8062         size += wake_size + wake_mask_size;
8063         size += tokens_size;
8064
8065         cfg = kzalloc(size, GFP_KERNEL);
8066         if (!cfg)
8067                 return -ENOMEM;
8068         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8069         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8070         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8071                ETH_ALEN);
8072         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8073                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8074         else
8075                 port = 0;
8076 #ifdef CONFIG_INET
8077         /* allocate a socket and port for it and use it */
8078         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8079                             IPPROTO_TCP, &cfg->sock, 1);
8080         if (err) {
8081                 kfree(cfg);
8082                 return err;
8083         }
8084         if (inet_csk_get_port(cfg->sock->sk, port)) {
8085                 sock_release(cfg->sock);
8086                 kfree(cfg);
8087                 return -EADDRINUSE;
8088         }
8089         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8090 #else
8091         if (!port) {
8092                 kfree(cfg);
8093                 return -EINVAL;
8094         }
8095         cfg->src_port = port;
8096 #endif
8097
8098         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8099         cfg->payload_len = data_size;
8100         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8101         memcpy((void *)cfg->payload,
8102                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8103                data_size);
8104         if (seq)
8105                 cfg->payload_seq = *seq;
8106         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8107         cfg->wake_len = wake_size;
8108         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8109         memcpy((void *)cfg->wake_data,
8110                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8111                wake_size);
8112         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8113                          data_size + wake_size;
8114         memcpy((void *)cfg->wake_mask,
8115                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8116                wake_mask_size);
8117         if (tok) {
8118                 cfg->tokens_size = tokens_size;
8119                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8120         }
8121
8122         trig->tcp = cfg;
8123
8124         return 0;
8125 }
8126
8127 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8128 {
8129         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8130         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8131         struct cfg80211_wowlan new_triggers = {};
8132         struct cfg80211_wowlan *ntrig;
8133         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8134         int err, i;
8135         bool prev_enabled = rdev->wiphy.wowlan_config;
8136
8137         if (!wowlan)
8138                 return -EOPNOTSUPP;
8139
8140         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8141                 cfg80211_rdev_free_wowlan(rdev);
8142                 rdev->wiphy.wowlan_config = NULL;
8143                 goto set_wakeup;
8144         }
8145
8146         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8147                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8148                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8149                         nl80211_wowlan_policy);
8150         if (err)
8151                 return err;
8152
8153         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8154                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8155                         return -EINVAL;
8156                 new_triggers.any = true;
8157         }
8158
8159         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8160                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8161                         return -EINVAL;
8162                 new_triggers.disconnect = true;
8163         }
8164
8165         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8166                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8167                         return -EINVAL;
8168                 new_triggers.magic_pkt = true;
8169         }
8170
8171         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8172                 return -EINVAL;
8173
8174         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8175                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8176                         return -EINVAL;
8177                 new_triggers.gtk_rekey_failure = true;
8178         }
8179
8180         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8181                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8182                         return -EINVAL;
8183                 new_triggers.eap_identity_req = true;
8184         }
8185
8186         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8187                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8188                         return -EINVAL;
8189                 new_triggers.four_way_handshake = true;
8190         }
8191
8192         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8193                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8194                         return -EINVAL;
8195                 new_triggers.rfkill_release = true;
8196         }
8197
8198         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8199                 struct nlattr *pat;
8200                 int n_patterns = 0;
8201                 int rem, pat_len, mask_len, pkt_offset;
8202                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8203
8204                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8205                                     rem)
8206                         n_patterns++;
8207                 if (n_patterns > wowlan->n_patterns)
8208                         return -EINVAL;
8209
8210                 new_triggers.patterns = kcalloc(n_patterns,
8211                                                 sizeof(new_triggers.patterns[0]),
8212                                                 GFP_KERNEL);
8213                 if (!new_triggers.patterns)
8214                         return -ENOMEM;
8215
8216                 new_triggers.n_patterns = n_patterns;
8217                 i = 0;
8218
8219                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8220                                     rem) {
8221                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8222                                   nla_len(pat), NULL);
8223                         err = -EINVAL;
8224                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8225                             !pat_tb[NL80211_PKTPAT_PATTERN])
8226                                 goto error;
8227                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8228                         mask_len = DIV_ROUND_UP(pat_len, 8);
8229                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8230                                 goto error;
8231                         if (pat_len > wowlan->pattern_max_len ||
8232                             pat_len < wowlan->pattern_min_len)
8233                                 goto error;
8234
8235                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8236                                 pkt_offset = 0;
8237                         else
8238                                 pkt_offset = nla_get_u32(
8239                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8240                         if (pkt_offset > wowlan->max_pkt_offset)
8241                                 goto error;
8242                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8243
8244                         new_triggers.patterns[i].mask =
8245                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8246                         if (!new_triggers.patterns[i].mask) {
8247                                 err = -ENOMEM;
8248                                 goto error;
8249                         }
8250                         new_triggers.patterns[i].pattern =
8251                                 new_triggers.patterns[i].mask + mask_len;
8252                         memcpy(new_triggers.patterns[i].mask,
8253                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8254                                mask_len);
8255                         new_triggers.patterns[i].pattern_len = pat_len;
8256                         memcpy(new_triggers.patterns[i].pattern,
8257                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8258                                pat_len);
8259                         i++;
8260                 }
8261         }
8262
8263         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8264                 err = nl80211_parse_wowlan_tcp(
8265                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8266                         &new_triggers);
8267                 if (err)
8268                         goto error;
8269         }
8270
8271         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8272         if (!ntrig) {
8273                 err = -ENOMEM;
8274                 goto error;
8275         }
8276         cfg80211_rdev_free_wowlan(rdev);
8277         rdev->wiphy.wowlan_config = ntrig;
8278
8279  set_wakeup:
8280         if (rdev->ops->set_wakeup &&
8281             prev_enabled != !!rdev->wiphy.wowlan_config)
8282                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8283
8284         return 0;
8285  error:
8286         for (i = 0; i < new_triggers.n_patterns; i++)
8287                 kfree(new_triggers.patterns[i].mask);
8288         kfree(new_triggers.patterns);
8289         if (new_triggers.tcp && new_triggers.tcp->sock)
8290                 sock_release(new_triggers.tcp->sock);
8291         kfree(new_triggers.tcp);
8292         return err;
8293 }
8294 #endif
8295
8296 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8297                                        struct cfg80211_registered_device *rdev)
8298 {
8299         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8300         int i, j, pat_len;
8301         struct cfg80211_coalesce_rules *rule;
8302
8303         if (!rdev->coalesce->n_rules)
8304                 return 0;
8305
8306         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8307         if (!nl_rules)
8308                 return -ENOBUFS;
8309
8310         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8311                 nl_rule = nla_nest_start(msg, i + 1);
8312                 if (!nl_rule)
8313                         return -ENOBUFS;
8314
8315                 rule = &rdev->coalesce->rules[i];
8316                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8317                                 rule->delay))
8318                         return -ENOBUFS;
8319
8320                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8321                                 rule->condition))
8322                         return -ENOBUFS;
8323
8324                 nl_pats = nla_nest_start(msg,
8325                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8326                 if (!nl_pats)
8327                         return -ENOBUFS;
8328
8329                 for (j = 0; j < rule->n_patterns; j++) {
8330                         nl_pat = nla_nest_start(msg, j + 1);
8331                         if (!nl_pat)
8332                                 return -ENOBUFS;
8333                         pat_len = rule->patterns[j].pattern_len;
8334                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8335                                     DIV_ROUND_UP(pat_len, 8),
8336                                     rule->patterns[j].mask) ||
8337                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8338                                     rule->patterns[j].pattern) ||
8339                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8340                                         rule->patterns[j].pkt_offset))
8341                                 return -ENOBUFS;
8342                         nla_nest_end(msg, nl_pat);
8343                 }
8344                 nla_nest_end(msg, nl_pats);
8345                 nla_nest_end(msg, nl_rule);
8346         }
8347         nla_nest_end(msg, nl_rules);
8348
8349         return 0;
8350 }
8351
8352 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8353 {
8354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8355         struct sk_buff *msg;
8356         void *hdr;
8357
8358         if (!rdev->wiphy.coalesce)
8359                 return -EOPNOTSUPP;
8360
8361         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8362         if (!msg)
8363                 return -ENOMEM;
8364
8365         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8366                              NL80211_CMD_GET_COALESCE);
8367         if (!hdr)
8368                 goto nla_put_failure;
8369
8370         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8371                 goto nla_put_failure;
8372
8373         genlmsg_end(msg, hdr);
8374         return genlmsg_reply(msg, info);
8375
8376 nla_put_failure:
8377         nlmsg_free(msg);
8378         return -ENOBUFS;
8379 }
8380
8381 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8382 {
8383         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8384         int i, j;
8385         struct cfg80211_coalesce_rules *rule;
8386
8387         if (!coalesce)
8388                 return;
8389
8390         for (i = 0; i < coalesce->n_rules; i++) {
8391                 rule = &coalesce->rules[i];
8392                 for (j = 0; j < rule->n_patterns; j++)
8393                         kfree(rule->patterns[j].mask);
8394                 kfree(rule->patterns);
8395         }
8396         kfree(coalesce->rules);
8397         kfree(coalesce);
8398         rdev->coalesce = NULL;
8399 }
8400
8401 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8402                                        struct nlattr *rule,
8403                                        struct cfg80211_coalesce_rules *new_rule)
8404 {
8405         int err, i;
8406         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8407         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8408         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8409         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8410
8411         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8412                         nla_len(rule), nl80211_coalesce_policy);
8413         if (err)
8414                 return err;
8415
8416         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8417                 new_rule->delay =
8418                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8419         if (new_rule->delay > coalesce->max_delay)
8420                 return -EINVAL;
8421
8422         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8423                 new_rule->condition =
8424                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8425         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8426             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8427                 return -EINVAL;
8428
8429         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8430                 return -EINVAL;
8431
8432         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8433                             rem)
8434                 n_patterns++;
8435         if (n_patterns > coalesce->n_patterns)
8436                 return -EINVAL;
8437
8438         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8439                                      GFP_KERNEL);
8440         if (!new_rule->patterns)
8441                 return -ENOMEM;
8442
8443         new_rule->n_patterns = n_patterns;
8444         i = 0;
8445
8446         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8447                             rem) {
8448                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8449                           nla_len(pat), NULL);
8450                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8451                     !pat_tb[NL80211_PKTPAT_PATTERN])
8452                         return -EINVAL;
8453                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8454                 mask_len = DIV_ROUND_UP(pat_len, 8);
8455                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8456                         return -EINVAL;
8457                 if (pat_len > coalesce->pattern_max_len ||
8458                     pat_len < coalesce->pattern_min_len)
8459                         return -EINVAL;
8460
8461                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8462                         pkt_offset = 0;
8463                 else
8464                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8465                 if (pkt_offset > coalesce->max_pkt_offset)
8466                         return -EINVAL;
8467                 new_rule->patterns[i].pkt_offset = pkt_offset;
8468
8469                 new_rule->patterns[i].mask =
8470                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8471                 if (!new_rule->patterns[i].mask)
8472                         return -ENOMEM;
8473                 new_rule->patterns[i].pattern =
8474                         new_rule->patterns[i].mask + mask_len;
8475                 memcpy(new_rule->patterns[i].mask,
8476                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8477                 new_rule->patterns[i].pattern_len = pat_len;
8478                 memcpy(new_rule->patterns[i].pattern,
8479                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8480                 i++;
8481         }
8482
8483         return 0;
8484 }
8485
8486 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8487 {
8488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8489         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8490         struct cfg80211_coalesce new_coalesce = {};
8491         struct cfg80211_coalesce *n_coalesce;
8492         int err, rem_rule, n_rules = 0, i, j;
8493         struct nlattr *rule;
8494         struct cfg80211_coalesce_rules *tmp_rule;
8495
8496         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8497                 return -EOPNOTSUPP;
8498
8499         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8500                 cfg80211_rdev_free_coalesce(rdev);
8501                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8502                 return 0;
8503         }
8504
8505         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8506                             rem_rule)
8507                 n_rules++;
8508         if (n_rules > coalesce->n_rules)
8509                 return -EINVAL;
8510
8511         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8512                                      GFP_KERNEL);
8513         if (!new_coalesce.rules)
8514                 return -ENOMEM;
8515
8516         new_coalesce.n_rules = n_rules;
8517         i = 0;
8518
8519         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8520                             rem_rule) {
8521                 err = nl80211_parse_coalesce_rule(rdev, rule,
8522                                                   &new_coalesce.rules[i]);
8523                 if (err)
8524                         goto error;
8525
8526                 i++;
8527         }
8528
8529         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8530         if (err)
8531                 goto error;
8532
8533         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8534         if (!n_coalesce) {
8535                 err = -ENOMEM;
8536                 goto error;
8537         }
8538         cfg80211_rdev_free_coalesce(rdev);
8539         rdev->coalesce = n_coalesce;
8540
8541         return 0;
8542 error:
8543         for (i = 0; i < new_coalesce.n_rules; i++) {
8544                 tmp_rule = &new_coalesce.rules[i];
8545                 for (j = 0; j < tmp_rule->n_patterns; j++)
8546                         kfree(tmp_rule->patterns[j].mask);
8547                 kfree(tmp_rule->patterns);
8548         }
8549         kfree(new_coalesce.rules);
8550
8551         return err;
8552 }
8553
8554 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8555 {
8556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8557         struct net_device *dev = info->user_ptr[1];
8558         struct wireless_dev *wdev = dev->ieee80211_ptr;
8559         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8560         struct cfg80211_gtk_rekey_data rekey_data;
8561         int err;
8562
8563         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8564                 return -EINVAL;
8565
8566         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8567                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8568                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8569                         nl80211_rekey_policy);
8570         if (err)
8571                 return err;
8572
8573         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8574                 return -ERANGE;
8575         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8576                 return -ERANGE;
8577         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8578                 return -ERANGE;
8579
8580         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8581                NL80211_KEK_LEN);
8582         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8583                NL80211_KCK_LEN);
8584         memcpy(rekey_data.replay_ctr,
8585                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8586                NL80211_REPLAY_CTR_LEN);
8587
8588         wdev_lock(wdev);
8589         if (!wdev->current_bss) {
8590                 err = -ENOTCONN;
8591                 goto out;
8592         }
8593
8594         if (!rdev->ops->set_rekey_data) {
8595                 err = -EOPNOTSUPP;
8596                 goto out;
8597         }
8598
8599         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8600  out:
8601         wdev_unlock(wdev);
8602         return err;
8603 }
8604
8605 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8606                                              struct genl_info *info)
8607 {
8608         struct net_device *dev = info->user_ptr[1];
8609         struct wireless_dev *wdev = dev->ieee80211_ptr;
8610
8611         if (wdev->iftype != NL80211_IFTYPE_AP &&
8612             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8613                 return -EINVAL;
8614
8615         if (wdev->ap_unexpected_nlportid)
8616                 return -EBUSY;
8617
8618         wdev->ap_unexpected_nlportid = info->snd_portid;
8619         return 0;
8620 }
8621
8622 static int nl80211_probe_client(struct sk_buff *skb,
8623                                 struct genl_info *info)
8624 {
8625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8626         struct net_device *dev = info->user_ptr[1];
8627         struct wireless_dev *wdev = dev->ieee80211_ptr;
8628         struct sk_buff *msg;
8629         void *hdr;
8630         const u8 *addr;
8631         u64 cookie;
8632         int err;
8633
8634         if (wdev->iftype != NL80211_IFTYPE_AP &&
8635             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8636                 return -EOPNOTSUPP;
8637
8638         if (!info->attrs[NL80211_ATTR_MAC])
8639                 return -EINVAL;
8640
8641         if (!rdev->ops->probe_client)
8642                 return -EOPNOTSUPP;
8643
8644         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8645         if (!msg)
8646                 return -ENOMEM;
8647
8648         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8649                              NL80211_CMD_PROBE_CLIENT);
8650         if (!hdr) {
8651                 err = -ENOBUFS;
8652                 goto free_msg;
8653         }
8654
8655         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8656
8657         err = rdev_probe_client(rdev, dev, addr, &cookie);
8658         if (err)
8659                 goto free_msg;
8660
8661         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8662                 goto nla_put_failure;
8663
8664         genlmsg_end(msg, hdr);
8665
8666         return genlmsg_reply(msg, info);
8667
8668  nla_put_failure:
8669         err = -ENOBUFS;
8670  free_msg:
8671         nlmsg_free(msg);
8672         return err;
8673 }
8674
8675 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8676 {
8677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8678         struct cfg80211_beacon_registration *reg, *nreg;
8679         int rv;
8680
8681         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8682                 return -EOPNOTSUPP;
8683
8684         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8685         if (!nreg)
8686                 return -ENOMEM;
8687
8688         /* First, check if already registered. */
8689         spin_lock_bh(&rdev->beacon_registrations_lock);
8690         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8691                 if (reg->nlportid == info->snd_portid) {
8692                         rv = -EALREADY;
8693                         goto out_err;
8694                 }
8695         }
8696         /* Add it to the list */
8697         nreg->nlportid = info->snd_portid;
8698         list_add(&nreg->list, &rdev->beacon_registrations);
8699
8700         spin_unlock_bh(&rdev->beacon_registrations_lock);
8701
8702         return 0;
8703 out_err:
8704         spin_unlock_bh(&rdev->beacon_registrations_lock);
8705         kfree(nreg);
8706         return rv;
8707 }
8708
8709 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8710 {
8711         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8712         struct wireless_dev *wdev = info->user_ptr[1];
8713         int err;
8714
8715         if (!rdev->ops->start_p2p_device)
8716                 return -EOPNOTSUPP;
8717
8718         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8719                 return -EOPNOTSUPP;
8720
8721         if (wdev->p2p_started)
8722                 return 0;
8723
8724         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8725         if (err)
8726                 return err;
8727
8728         err = rdev_start_p2p_device(rdev, wdev);
8729         if (err)
8730                 return err;
8731
8732         wdev->p2p_started = true;
8733         rdev->opencount++;
8734
8735         return 0;
8736 }
8737
8738 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8739 {
8740         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8741         struct wireless_dev *wdev = info->user_ptr[1];
8742
8743         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8744                 return -EOPNOTSUPP;
8745
8746         if (!rdev->ops->stop_p2p_device)
8747                 return -EOPNOTSUPP;
8748
8749         cfg80211_stop_p2p_device(rdev, wdev);
8750
8751         return 0;
8752 }
8753
8754 static int nl80211_get_protocol_features(struct sk_buff *skb,
8755                                          struct genl_info *info)
8756 {
8757         void *hdr;
8758         struct sk_buff *msg;
8759
8760         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8761         if (!msg)
8762                 return -ENOMEM;
8763
8764         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8765                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8766         if (!hdr)
8767                 goto nla_put_failure;
8768
8769         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8770                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8771                 goto nla_put_failure;
8772
8773         genlmsg_end(msg, hdr);
8774         return genlmsg_reply(msg, info);
8775
8776  nla_put_failure:
8777         kfree_skb(msg);
8778         return -ENOBUFS;
8779 }
8780
8781 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8782 {
8783         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8784         struct cfg80211_update_ft_ies_params ft_params;
8785         struct net_device *dev = info->user_ptr[1];
8786
8787         if (!rdev->ops->update_ft_ies)
8788                 return -EOPNOTSUPP;
8789
8790         if (!info->attrs[NL80211_ATTR_MDID] ||
8791             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8792                 return -EINVAL;
8793
8794         memset(&ft_params, 0, sizeof(ft_params));
8795         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8796         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8797         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8798
8799         return rdev_update_ft_ies(rdev, dev, &ft_params);
8800 }
8801
8802 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8803                                        struct genl_info *info)
8804 {
8805         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8806         struct wireless_dev *wdev = info->user_ptr[1];
8807         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8808         u16 duration;
8809         int ret;
8810
8811         if (!rdev->ops->crit_proto_start)
8812                 return -EOPNOTSUPP;
8813
8814         if (WARN_ON(!rdev->ops->crit_proto_stop))
8815                 return -EINVAL;
8816
8817         if (rdev->crit_proto_nlportid)
8818                 return -EBUSY;
8819
8820         /* determine protocol if provided */
8821         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8822                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8823
8824         if (proto >= NUM_NL80211_CRIT_PROTO)
8825                 return -EINVAL;
8826
8827         /* timeout must be provided */
8828         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8829                 return -EINVAL;
8830
8831         duration =
8832                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8833
8834         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8835                 return -ERANGE;
8836
8837         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8838         if (!ret)
8839                 rdev->crit_proto_nlportid = info->snd_portid;
8840
8841         return ret;
8842 }
8843
8844 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8845                                       struct genl_info *info)
8846 {
8847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8848         struct wireless_dev *wdev = info->user_ptr[1];
8849
8850         if (!rdev->ops->crit_proto_stop)
8851                 return -EOPNOTSUPP;
8852
8853         if (rdev->crit_proto_nlportid) {
8854                 rdev->crit_proto_nlportid = 0;
8855                 rdev_crit_proto_stop(rdev, wdev);
8856         }
8857         return 0;
8858 }
8859
8860 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
8861 {
8862         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8863         struct wireless_dev *wdev =
8864                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8865         int i, err;
8866         u32 vid, subcmd;
8867
8868         if (!rdev->wiphy.vendor_commands)
8869                 return -EOPNOTSUPP;
8870
8871         if (IS_ERR(wdev)) {
8872                 err = PTR_ERR(wdev);
8873                 if (err != -EINVAL)
8874                         return err;
8875                 wdev = NULL;
8876         } else if (wdev->wiphy != &rdev->wiphy) {
8877                 return -EINVAL;
8878         }
8879
8880         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
8881             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
8882                 return -EINVAL;
8883
8884         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
8885         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
8886         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
8887                 const struct wiphy_vendor_command *vcmd;
8888                 void *data = NULL;
8889                 int len = 0;
8890
8891                 vcmd = &rdev->wiphy.vendor_commands[i];
8892
8893                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
8894                         continue;
8895
8896                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
8897                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
8898                         if (!wdev)
8899                                 return -EINVAL;
8900                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
8901                             !wdev->netdev)
8902                                 return -EINVAL;
8903
8904                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
8905                                 if (wdev->netdev &&
8906                                     !netif_running(wdev->netdev))
8907                                         return -ENETDOWN;
8908                                 if (!wdev->netdev && !wdev->p2p_started)
8909                                         return -ENETDOWN;
8910                         }
8911                 } else {
8912                         wdev = NULL;
8913                 }
8914
8915                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
8916                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
8917                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
8918                 }
8919
8920                 rdev->cur_cmd_info = info;
8921                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
8922                                                           data, len);
8923                 rdev->cur_cmd_info = NULL;
8924                 return err;
8925         }
8926
8927         return -EOPNOTSUPP;
8928 }
8929
8930 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
8931                                            enum nl80211_commands cmd,
8932                                            enum nl80211_attrs attr,
8933                                            int approxlen)
8934 {
8935         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8936
8937         if (WARN_ON(!rdev->cur_cmd_info))
8938                 return NULL;
8939
8940         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
8941                                            rdev->cur_cmd_info->snd_portid,
8942                                            rdev->cur_cmd_info->snd_seq,
8943                                            cmd, attr, GFP_KERNEL);
8944 }
8945 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
8946
8947 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
8948 {
8949         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8950         void *hdr = ((void **)skb->cb)[1];
8951         struct nlattr *data = ((void **)skb->cb)[2];
8952
8953         if (WARN_ON(!rdev->cur_cmd_info)) {
8954                 kfree_skb(skb);
8955                 return -EINVAL;
8956         }
8957
8958         nla_nest_end(skb, data);
8959         genlmsg_end(skb, hdr);
8960         return genlmsg_reply(skb, rdev->cur_cmd_info);
8961 }
8962 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
8963
8964
8965 #define NL80211_FLAG_NEED_WIPHY         0x01
8966 #define NL80211_FLAG_NEED_NETDEV        0x02
8967 #define NL80211_FLAG_NEED_RTNL          0x04
8968 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8969 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8970                                          NL80211_FLAG_CHECK_NETDEV_UP)
8971 #define NL80211_FLAG_NEED_WDEV          0x10
8972 /* If a netdev is associated, it must be UP, P2P must be started */
8973 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8974                                          NL80211_FLAG_CHECK_NETDEV_UP)
8975
8976 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8977                             struct genl_info *info)
8978 {
8979         struct cfg80211_registered_device *rdev;
8980         struct wireless_dev *wdev;
8981         struct net_device *dev;
8982         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8983
8984         if (rtnl)
8985                 rtnl_lock();
8986
8987         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8988                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8989                 if (IS_ERR(rdev)) {
8990                         if (rtnl)
8991                                 rtnl_unlock();
8992                         return PTR_ERR(rdev);
8993                 }
8994                 info->user_ptr[0] = rdev;
8995         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8996                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8997                 ASSERT_RTNL();
8998
8999                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9000                                                   info->attrs);
9001                 if (IS_ERR(wdev)) {
9002                         if (rtnl)
9003                                 rtnl_unlock();
9004                         return PTR_ERR(wdev);
9005                 }
9006
9007                 dev = wdev->netdev;
9008                 rdev = wiphy_to_dev(wdev->wiphy);
9009
9010                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9011                         if (!dev) {
9012                                 if (rtnl)
9013                                         rtnl_unlock();
9014                                 return -EINVAL;
9015                         }
9016
9017                         info->user_ptr[1] = dev;
9018                 } else {
9019                         info->user_ptr[1] = wdev;
9020                 }
9021
9022                 if (dev) {
9023                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9024                             !netif_running(dev)) {
9025                                 if (rtnl)
9026                                         rtnl_unlock();
9027                                 return -ENETDOWN;
9028                         }
9029
9030                         dev_hold(dev);
9031                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9032                         if (!wdev->p2p_started) {
9033                                 if (rtnl)
9034                                         rtnl_unlock();
9035                                 return -ENETDOWN;
9036                         }
9037                 }
9038
9039                 info->user_ptr[0] = rdev;
9040         }
9041
9042         return 0;
9043 }
9044
9045 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
9046                               struct genl_info *info)
9047 {
9048         if (info->user_ptr[1]) {
9049                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9050                         struct wireless_dev *wdev = info->user_ptr[1];
9051
9052                         if (wdev->netdev)
9053                                 dev_put(wdev->netdev);
9054                 } else {
9055                         dev_put(info->user_ptr[1]);
9056                 }
9057         }
9058         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9059                 rtnl_unlock();
9060 }
9061
9062 static struct genl_ops nl80211_ops[] = {
9063         {
9064                 .cmd = NL80211_CMD_GET_WIPHY,
9065                 .doit = nl80211_get_wiphy,
9066                 .dumpit = nl80211_dump_wiphy,
9067                 .done = nl80211_dump_wiphy_done,
9068                 .policy = nl80211_policy,
9069                 /* can be retrieved by unprivileged users */
9070                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9071                                   NL80211_FLAG_NEED_RTNL,
9072         },
9073         {
9074                 .cmd = NL80211_CMD_SET_WIPHY,
9075                 .doit = nl80211_set_wiphy,
9076                 .policy = nl80211_policy,
9077                 .flags = GENL_ADMIN_PERM,
9078                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9079         },
9080         {
9081                 .cmd = NL80211_CMD_GET_INTERFACE,
9082                 .doit = nl80211_get_interface,
9083                 .dumpit = nl80211_dump_interface,
9084                 .policy = nl80211_policy,
9085                 /* can be retrieved by unprivileged users */
9086                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9087                                   NL80211_FLAG_NEED_RTNL,
9088         },
9089         {
9090                 .cmd = NL80211_CMD_SET_INTERFACE,
9091                 .doit = nl80211_set_interface,
9092                 .policy = nl80211_policy,
9093                 .flags = GENL_ADMIN_PERM,
9094                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9095                                   NL80211_FLAG_NEED_RTNL,
9096         },
9097         {
9098                 .cmd = NL80211_CMD_NEW_INTERFACE,
9099                 .doit = nl80211_new_interface,
9100                 .policy = nl80211_policy,
9101                 .flags = GENL_ADMIN_PERM,
9102                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9103                                   NL80211_FLAG_NEED_RTNL,
9104         },
9105         {
9106                 .cmd = NL80211_CMD_DEL_INTERFACE,
9107                 .doit = nl80211_del_interface,
9108                 .policy = nl80211_policy,
9109                 .flags = GENL_ADMIN_PERM,
9110                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9111                                   NL80211_FLAG_NEED_RTNL,
9112         },
9113         {
9114                 .cmd = NL80211_CMD_GET_KEY,
9115                 .doit = nl80211_get_key,
9116                 .policy = nl80211_policy,
9117                 .flags = GENL_ADMIN_PERM,
9118                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9119                                   NL80211_FLAG_NEED_RTNL,
9120         },
9121         {
9122                 .cmd = NL80211_CMD_SET_KEY,
9123                 .doit = nl80211_set_key,
9124                 .policy = nl80211_policy,
9125                 .flags = GENL_ADMIN_PERM,
9126                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9127                                   NL80211_FLAG_NEED_RTNL,
9128         },
9129         {
9130                 .cmd = NL80211_CMD_NEW_KEY,
9131                 .doit = nl80211_new_key,
9132                 .policy = nl80211_policy,
9133                 .flags = GENL_ADMIN_PERM,
9134                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9135                                   NL80211_FLAG_NEED_RTNL,
9136         },
9137         {
9138                 .cmd = NL80211_CMD_DEL_KEY,
9139                 .doit = nl80211_del_key,
9140                 .policy = nl80211_policy,
9141                 .flags = GENL_ADMIN_PERM,
9142                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9143                                   NL80211_FLAG_NEED_RTNL,
9144         },
9145         {
9146                 .cmd = NL80211_CMD_SET_BEACON,
9147                 .policy = nl80211_policy,
9148                 .flags = GENL_ADMIN_PERM,
9149                 .doit = nl80211_set_beacon,
9150                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9151                                   NL80211_FLAG_NEED_RTNL,
9152         },
9153         {
9154                 .cmd = NL80211_CMD_START_AP,
9155                 .policy = nl80211_policy,
9156                 .flags = GENL_ADMIN_PERM,
9157                 .doit = nl80211_start_ap,
9158                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9159                                   NL80211_FLAG_NEED_RTNL,
9160         },
9161         {
9162                 .cmd = NL80211_CMD_STOP_AP,
9163                 .policy = nl80211_policy,
9164                 .flags = GENL_ADMIN_PERM,
9165                 .doit = nl80211_stop_ap,
9166                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9167                                   NL80211_FLAG_NEED_RTNL,
9168         },
9169         {
9170                 .cmd = NL80211_CMD_GET_STATION,
9171                 .doit = nl80211_get_station,
9172                 .dumpit = nl80211_dump_station,
9173                 .policy = nl80211_policy,
9174                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9175                                   NL80211_FLAG_NEED_RTNL,
9176         },
9177         {
9178                 .cmd = NL80211_CMD_SET_STATION,
9179                 .doit = nl80211_set_station,
9180                 .policy = nl80211_policy,
9181                 .flags = GENL_ADMIN_PERM,
9182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9183                                   NL80211_FLAG_NEED_RTNL,
9184         },
9185         {
9186                 .cmd = NL80211_CMD_NEW_STATION,
9187                 .doit = nl80211_new_station,
9188                 .policy = nl80211_policy,
9189                 .flags = GENL_ADMIN_PERM,
9190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9191                                   NL80211_FLAG_NEED_RTNL,
9192         },
9193         {
9194                 .cmd = NL80211_CMD_DEL_STATION,
9195                 .doit = nl80211_del_station,
9196                 .policy = nl80211_policy,
9197                 .flags = GENL_ADMIN_PERM,
9198                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9199                                   NL80211_FLAG_NEED_RTNL,
9200         },
9201         {
9202                 .cmd = NL80211_CMD_GET_MPATH,
9203                 .doit = nl80211_get_mpath,
9204                 .dumpit = nl80211_dump_mpath,
9205                 .policy = nl80211_policy,
9206                 .flags = GENL_ADMIN_PERM,
9207                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9208                                   NL80211_FLAG_NEED_RTNL,
9209         },
9210         {
9211                 .cmd = NL80211_CMD_SET_MPATH,
9212                 .doit = nl80211_set_mpath,
9213                 .policy = nl80211_policy,
9214                 .flags = GENL_ADMIN_PERM,
9215                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9216                                   NL80211_FLAG_NEED_RTNL,
9217         },
9218         {
9219                 .cmd = NL80211_CMD_NEW_MPATH,
9220                 .doit = nl80211_new_mpath,
9221                 .policy = nl80211_policy,
9222                 .flags = GENL_ADMIN_PERM,
9223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9224                                   NL80211_FLAG_NEED_RTNL,
9225         },
9226         {
9227                 .cmd = NL80211_CMD_DEL_MPATH,
9228                 .doit = nl80211_del_mpath,
9229                 .policy = nl80211_policy,
9230                 .flags = GENL_ADMIN_PERM,
9231                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9232                                   NL80211_FLAG_NEED_RTNL,
9233         },
9234         {
9235                 .cmd = NL80211_CMD_SET_BSS,
9236                 .doit = nl80211_set_bss,
9237                 .policy = nl80211_policy,
9238                 .flags = GENL_ADMIN_PERM,
9239                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9240                                   NL80211_FLAG_NEED_RTNL,
9241         },
9242         {
9243                 .cmd = NL80211_CMD_GET_REG,
9244                 .doit = nl80211_get_reg,
9245                 .policy = nl80211_policy,
9246                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9247                 /* can be retrieved by unprivileged users */
9248         },
9249         {
9250                 .cmd = NL80211_CMD_SET_REG,
9251                 .doit = nl80211_set_reg,
9252                 .policy = nl80211_policy,
9253                 .flags = GENL_ADMIN_PERM,
9254                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9255         },
9256         {
9257                 .cmd = NL80211_CMD_REQ_SET_REG,
9258                 .doit = nl80211_req_set_reg,
9259                 .policy = nl80211_policy,
9260                 .flags = GENL_ADMIN_PERM,
9261         },
9262         {
9263                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9264                 .doit = nl80211_get_mesh_config,
9265                 .policy = nl80211_policy,
9266                 /* can be retrieved by unprivileged users */
9267                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9268                                   NL80211_FLAG_NEED_RTNL,
9269         },
9270         {
9271                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9272                 .doit = nl80211_update_mesh_config,
9273                 .policy = nl80211_policy,
9274                 .flags = GENL_ADMIN_PERM,
9275                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9276                                   NL80211_FLAG_NEED_RTNL,
9277         },
9278         {
9279                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9280                 .doit = nl80211_trigger_scan,
9281                 .policy = nl80211_policy,
9282                 .flags = GENL_ADMIN_PERM,
9283                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9284                                   NL80211_FLAG_NEED_RTNL,
9285         },
9286         {
9287                 .cmd = NL80211_CMD_GET_SCAN,
9288                 .policy = nl80211_policy,
9289                 .dumpit = nl80211_dump_scan,
9290         },
9291         {
9292                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9293                 .doit = nl80211_start_sched_scan,
9294                 .policy = nl80211_policy,
9295                 .flags = GENL_ADMIN_PERM,
9296                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9297                                   NL80211_FLAG_NEED_RTNL,
9298         },
9299         {
9300                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9301                 .doit = nl80211_stop_sched_scan,
9302                 .policy = nl80211_policy,
9303                 .flags = GENL_ADMIN_PERM,
9304                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9305                                   NL80211_FLAG_NEED_RTNL,
9306         },
9307         {
9308                 .cmd = NL80211_CMD_AUTHENTICATE,
9309                 .doit = nl80211_authenticate,
9310                 .policy = nl80211_policy,
9311                 .flags = GENL_ADMIN_PERM,
9312                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9313                                   NL80211_FLAG_NEED_RTNL,
9314         },
9315         {
9316                 .cmd = NL80211_CMD_ASSOCIATE,
9317                 .doit = nl80211_associate,
9318                 .policy = nl80211_policy,
9319                 .flags = GENL_ADMIN_PERM,
9320                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9321                                   NL80211_FLAG_NEED_RTNL,
9322         },
9323         {
9324                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9325                 .doit = nl80211_deauthenticate,
9326                 .policy = nl80211_policy,
9327                 .flags = GENL_ADMIN_PERM,
9328                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9329                                   NL80211_FLAG_NEED_RTNL,
9330         },
9331         {
9332                 .cmd = NL80211_CMD_DISASSOCIATE,
9333                 .doit = nl80211_disassociate,
9334                 .policy = nl80211_policy,
9335                 .flags = GENL_ADMIN_PERM,
9336                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9337                                   NL80211_FLAG_NEED_RTNL,
9338         },
9339         {
9340                 .cmd = NL80211_CMD_JOIN_IBSS,
9341                 .doit = nl80211_join_ibss,
9342                 .policy = nl80211_policy,
9343                 .flags = GENL_ADMIN_PERM,
9344                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9345                                   NL80211_FLAG_NEED_RTNL,
9346         },
9347         {
9348                 .cmd = NL80211_CMD_LEAVE_IBSS,
9349                 .doit = nl80211_leave_ibss,
9350                 .policy = nl80211_policy,
9351                 .flags = GENL_ADMIN_PERM,
9352                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9353                                   NL80211_FLAG_NEED_RTNL,
9354         },
9355 #ifdef CONFIG_NL80211_TESTMODE
9356         {
9357                 .cmd = NL80211_CMD_TESTMODE,
9358                 .doit = nl80211_testmode_do,
9359                 .dumpit = nl80211_testmode_dump,
9360                 .policy = nl80211_policy,
9361                 .flags = GENL_ADMIN_PERM,
9362                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9363                                   NL80211_FLAG_NEED_RTNL,
9364         },
9365 #endif
9366         {
9367                 .cmd = NL80211_CMD_CONNECT,
9368                 .doit = nl80211_connect,
9369                 .policy = nl80211_policy,
9370                 .flags = GENL_ADMIN_PERM,
9371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9372                                   NL80211_FLAG_NEED_RTNL,
9373         },
9374         {
9375                 .cmd = NL80211_CMD_DISCONNECT,
9376                 .doit = nl80211_disconnect,
9377                 .policy = nl80211_policy,
9378                 .flags = GENL_ADMIN_PERM,
9379                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9380                                   NL80211_FLAG_NEED_RTNL,
9381         },
9382         {
9383                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9384                 .doit = nl80211_wiphy_netns,
9385                 .policy = nl80211_policy,
9386                 .flags = GENL_ADMIN_PERM,
9387                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9388                                   NL80211_FLAG_NEED_RTNL,
9389         },
9390         {
9391                 .cmd = NL80211_CMD_GET_SURVEY,
9392                 .policy = nl80211_policy,
9393                 .dumpit = nl80211_dump_survey,
9394         },
9395         {
9396                 .cmd = NL80211_CMD_SET_PMKSA,
9397                 .doit = nl80211_setdel_pmksa,
9398                 .policy = nl80211_policy,
9399                 .flags = GENL_ADMIN_PERM,
9400                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9401                                   NL80211_FLAG_NEED_RTNL,
9402         },
9403         {
9404                 .cmd = NL80211_CMD_DEL_PMKSA,
9405                 .doit = nl80211_setdel_pmksa,
9406                 .policy = nl80211_policy,
9407                 .flags = GENL_ADMIN_PERM,
9408                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9409                                   NL80211_FLAG_NEED_RTNL,
9410         },
9411         {
9412                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9413                 .doit = nl80211_flush_pmksa,
9414                 .policy = nl80211_policy,
9415                 .flags = GENL_ADMIN_PERM,
9416                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9417                                   NL80211_FLAG_NEED_RTNL,
9418         },
9419         {
9420                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9421                 .doit = nl80211_remain_on_channel,
9422                 .policy = nl80211_policy,
9423                 .flags = GENL_ADMIN_PERM,
9424                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9425                                   NL80211_FLAG_NEED_RTNL,
9426         },
9427         {
9428                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9429                 .doit = nl80211_cancel_remain_on_channel,
9430                 .policy = nl80211_policy,
9431                 .flags = GENL_ADMIN_PERM,
9432                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9433                                   NL80211_FLAG_NEED_RTNL,
9434         },
9435         {
9436                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9437                 .doit = nl80211_set_tx_bitrate_mask,
9438                 .policy = nl80211_policy,
9439                 .flags = GENL_ADMIN_PERM,
9440                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9441                                   NL80211_FLAG_NEED_RTNL,
9442         },
9443         {
9444                 .cmd = NL80211_CMD_REGISTER_FRAME,
9445                 .doit = nl80211_register_mgmt,
9446                 .policy = nl80211_policy,
9447                 .flags = GENL_ADMIN_PERM,
9448                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9449                                   NL80211_FLAG_NEED_RTNL,
9450         },
9451         {
9452                 .cmd = NL80211_CMD_FRAME,
9453                 .doit = nl80211_tx_mgmt,
9454                 .policy = nl80211_policy,
9455                 .flags = GENL_ADMIN_PERM,
9456                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9457                                   NL80211_FLAG_NEED_RTNL,
9458         },
9459         {
9460                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9461                 .doit = nl80211_tx_mgmt_cancel_wait,
9462                 .policy = nl80211_policy,
9463                 .flags = GENL_ADMIN_PERM,
9464                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9465                                   NL80211_FLAG_NEED_RTNL,
9466         },
9467         {
9468                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9469                 .doit = nl80211_set_power_save,
9470                 .policy = nl80211_policy,
9471                 .flags = GENL_ADMIN_PERM,
9472                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9473                                   NL80211_FLAG_NEED_RTNL,
9474         },
9475         {
9476                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9477                 .doit = nl80211_get_power_save,
9478                 .policy = nl80211_policy,
9479                 /* can be retrieved by unprivileged users */
9480                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9481                                   NL80211_FLAG_NEED_RTNL,
9482         },
9483         {
9484                 .cmd = NL80211_CMD_SET_CQM,
9485                 .doit = nl80211_set_cqm,
9486                 .policy = nl80211_policy,
9487                 .flags = GENL_ADMIN_PERM,
9488                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9489                                   NL80211_FLAG_NEED_RTNL,
9490         },
9491         {
9492                 .cmd = NL80211_CMD_SET_CHANNEL,
9493                 .doit = nl80211_set_channel,
9494                 .policy = nl80211_policy,
9495                 .flags = GENL_ADMIN_PERM,
9496                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9497                                   NL80211_FLAG_NEED_RTNL,
9498         },
9499         {
9500                 .cmd = NL80211_CMD_SET_WDS_PEER,
9501                 .doit = nl80211_set_wds_peer,
9502                 .policy = nl80211_policy,
9503                 .flags = GENL_ADMIN_PERM,
9504                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9505                                   NL80211_FLAG_NEED_RTNL,
9506         },
9507         {
9508                 .cmd = NL80211_CMD_JOIN_MESH,
9509                 .doit = nl80211_join_mesh,
9510                 .policy = nl80211_policy,
9511                 .flags = GENL_ADMIN_PERM,
9512                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9513                                   NL80211_FLAG_NEED_RTNL,
9514         },
9515         {
9516                 .cmd = NL80211_CMD_LEAVE_MESH,
9517                 .doit = nl80211_leave_mesh,
9518                 .policy = nl80211_policy,
9519                 .flags = GENL_ADMIN_PERM,
9520                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9521                                   NL80211_FLAG_NEED_RTNL,
9522         },
9523 #ifdef CONFIG_PM
9524         {
9525                 .cmd = NL80211_CMD_GET_WOWLAN,
9526                 .doit = nl80211_get_wowlan,
9527                 .policy = nl80211_policy,
9528                 /* can be retrieved by unprivileged users */
9529                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9530                                   NL80211_FLAG_NEED_RTNL,
9531         },
9532         {
9533                 .cmd = NL80211_CMD_SET_WOWLAN,
9534                 .doit = nl80211_set_wowlan,
9535                 .policy = nl80211_policy,
9536                 .flags = GENL_ADMIN_PERM,
9537                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9538                                   NL80211_FLAG_NEED_RTNL,
9539         },
9540 #endif
9541         {
9542                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9543                 .doit = nl80211_set_rekey_data,
9544                 .policy = nl80211_policy,
9545                 .flags = GENL_ADMIN_PERM,
9546                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9547                                   NL80211_FLAG_NEED_RTNL,
9548         },
9549         {
9550                 .cmd = NL80211_CMD_TDLS_MGMT,
9551                 .doit = nl80211_tdls_mgmt,
9552                 .policy = nl80211_policy,
9553                 .flags = GENL_ADMIN_PERM,
9554                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9555                                   NL80211_FLAG_NEED_RTNL,
9556         },
9557         {
9558                 .cmd = NL80211_CMD_TDLS_OPER,
9559                 .doit = nl80211_tdls_oper,
9560                 .policy = nl80211_policy,
9561                 .flags = GENL_ADMIN_PERM,
9562                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9563                                   NL80211_FLAG_NEED_RTNL,
9564         },
9565         {
9566                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9567                 .doit = nl80211_register_unexpected_frame,
9568                 .policy = nl80211_policy,
9569                 .flags = GENL_ADMIN_PERM,
9570                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9571                                   NL80211_FLAG_NEED_RTNL,
9572         },
9573         {
9574                 .cmd = NL80211_CMD_PROBE_CLIENT,
9575                 .doit = nl80211_probe_client,
9576                 .policy = nl80211_policy,
9577                 .flags = GENL_ADMIN_PERM,
9578                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9579                                   NL80211_FLAG_NEED_RTNL,
9580         },
9581         {
9582                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9583                 .doit = nl80211_register_beacons,
9584                 .policy = nl80211_policy,
9585                 .flags = GENL_ADMIN_PERM,
9586                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9587                                   NL80211_FLAG_NEED_RTNL,
9588         },
9589         {
9590                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9591                 .doit = nl80211_set_noack_map,
9592                 .policy = nl80211_policy,
9593                 .flags = GENL_ADMIN_PERM,
9594                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9595                                   NL80211_FLAG_NEED_RTNL,
9596         },
9597         {
9598                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9599                 .doit = nl80211_start_p2p_device,
9600                 .policy = nl80211_policy,
9601                 .flags = GENL_ADMIN_PERM,
9602                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9603                                   NL80211_FLAG_NEED_RTNL,
9604         },
9605         {
9606                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9607                 .doit = nl80211_stop_p2p_device,
9608                 .policy = nl80211_policy,
9609                 .flags = GENL_ADMIN_PERM,
9610                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9611                                   NL80211_FLAG_NEED_RTNL,
9612         },
9613         {
9614                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9615                 .doit = nl80211_set_mcast_rate,
9616                 .policy = nl80211_policy,
9617                 .flags = GENL_ADMIN_PERM,
9618                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9619                                   NL80211_FLAG_NEED_RTNL,
9620         },
9621         {
9622                 .cmd = NL80211_CMD_SET_MAC_ACL,
9623                 .doit = nl80211_set_mac_acl,
9624                 .policy = nl80211_policy,
9625                 .flags = GENL_ADMIN_PERM,
9626                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9627                                   NL80211_FLAG_NEED_RTNL,
9628         },
9629         {
9630                 .cmd = NL80211_CMD_RADAR_DETECT,
9631                 .doit = nl80211_start_radar_detection,
9632                 .policy = nl80211_policy,
9633                 .flags = GENL_ADMIN_PERM,
9634                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9635                                   NL80211_FLAG_NEED_RTNL,
9636         },
9637         {
9638                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9639                 .doit = nl80211_get_protocol_features,
9640                 .policy = nl80211_policy,
9641         },
9642         {
9643                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9644                 .doit = nl80211_update_ft_ies,
9645                 .policy = nl80211_policy,
9646                 .flags = GENL_ADMIN_PERM,
9647                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9648                                   NL80211_FLAG_NEED_RTNL,
9649         },
9650         {
9651                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9652                 .doit = nl80211_crit_protocol_start,
9653                 .policy = nl80211_policy,
9654                 .flags = GENL_ADMIN_PERM,
9655                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9656                                   NL80211_FLAG_NEED_RTNL,
9657         },
9658         {
9659                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9660                 .doit = nl80211_crit_protocol_stop,
9661                 .policy = nl80211_policy,
9662                 .flags = GENL_ADMIN_PERM,
9663                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9664                                   NL80211_FLAG_NEED_RTNL,
9665         },
9666         {
9667                 .cmd = NL80211_CMD_GET_COALESCE,
9668                 .doit = nl80211_get_coalesce,
9669                 .policy = nl80211_policy,
9670                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9671                                   NL80211_FLAG_NEED_RTNL,
9672         },
9673         {
9674                 .cmd = NL80211_CMD_SET_COALESCE,
9675                 .doit = nl80211_set_coalesce,
9676                 .policy = nl80211_policy,
9677                 .flags = GENL_ADMIN_PERM,
9678                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9679                                   NL80211_FLAG_NEED_RTNL,
9680         },
9681         {
9682                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9683                 .doit = nl80211_channel_switch,
9684                 .policy = nl80211_policy,
9685                 .flags = GENL_ADMIN_PERM,
9686                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9687                                   NL80211_FLAG_NEED_RTNL,
9688         },
9689         {
9690                 .cmd = NL80211_CMD_VENDOR,
9691                 .doit = nl80211_vendor_cmd,
9692                 .policy = nl80211_policy,
9693                 .flags = GENL_ADMIN_PERM,
9694                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9695                                   NL80211_FLAG_NEED_RTNL,
9696         },
9697 };
9698
9699 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9700         .name = "mlme",
9701 };
9702
9703 /* multicast groups */
9704 static struct genl_multicast_group nl80211_config_mcgrp = {
9705         .name = "config",
9706 };
9707 static struct genl_multicast_group nl80211_scan_mcgrp = {
9708         .name = "scan",
9709 };
9710 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9711         .name = "regulatory",
9712 };
9713
9714 /* notification functions */
9715
9716 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9717 {
9718         struct sk_buff *msg;
9719         struct nl80211_dump_wiphy_state state = {};
9720
9721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9722         if (!msg)
9723                 return;
9724
9725         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9726                 nlmsg_free(msg);
9727                 return;
9728         }
9729
9730         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9731                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9732 }
9733
9734 static int nl80211_add_scan_req(struct sk_buff *msg,
9735                                 struct cfg80211_registered_device *rdev)
9736 {
9737         struct cfg80211_scan_request *req = rdev->scan_req;
9738         struct nlattr *nest;
9739         int i;
9740
9741         if (WARN_ON(!req))
9742                 return 0;
9743
9744         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9745         if (!nest)
9746                 goto nla_put_failure;
9747         for (i = 0; i < req->n_ssids; i++) {
9748                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9749                         goto nla_put_failure;
9750         }
9751         nla_nest_end(msg, nest);
9752
9753         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9754         if (!nest)
9755                 goto nla_put_failure;
9756         for (i = 0; i < req->n_channels; i++) {
9757                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9758                         goto nla_put_failure;
9759         }
9760         nla_nest_end(msg, nest);
9761
9762         if (req->ie &&
9763             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9764                 goto nla_put_failure;
9765
9766         if (req->flags)
9767                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9768
9769         return 0;
9770  nla_put_failure:
9771         return -ENOBUFS;
9772 }
9773
9774 static int nl80211_send_scan_msg(struct sk_buff *msg,
9775                                  struct cfg80211_registered_device *rdev,
9776                                  struct wireless_dev *wdev,
9777                                  u32 portid, u32 seq, int flags,
9778                                  u32 cmd)
9779 {
9780         void *hdr;
9781
9782         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9783         if (!hdr)
9784                 return -1;
9785
9786         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9787             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9788                                          wdev->netdev->ifindex)) ||
9789             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9790                 goto nla_put_failure;
9791
9792         /* ignore errors and send incomplete event anyway */
9793         nl80211_add_scan_req(msg, rdev);
9794
9795         return genlmsg_end(msg, hdr);
9796
9797  nla_put_failure:
9798         genlmsg_cancel(msg, hdr);
9799         return -EMSGSIZE;
9800 }
9801
9802 static int
9803 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9804                             struct cfg80211_registered_device *rdev,
9805                             struct net_device *netdev,
9806                             u32 portid, u32 seq, int flags, u32 cmd)
9807 {
9808         void *hdr;
9809
9810         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9811         if (!hdr)
9812                 return -1;
9813
9814         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9815             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9816                 goto nla_put_failure;
9817
9818         return genlmsg_end(msg, hdr);
9819
9820  nla_put_failure:
9821         genlmsg_cancel(msg, hdr);
9822         return -EMSGSIZE;
9823 }
9824
9825 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9826                              struct wireless_dev *wdev)
9827 {
9828         struct sk_buff *msg;
9829
9830         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9831         if (!msg)
9832                 return;
9833
9834         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9835                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9836                 nlmsg_free(msg);
9837                 return;
9838         }
9839
9840         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9841                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9842 }
9843
9844 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9845                             struct wireless_dev *wdev)
9846 {
9847         struct sk_buff *msg;
9848
9849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9850         if (!msg)
9851                 return;
9852
9853         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9854                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9855                 nlmsg_free(msg);
9856                 return;
9857         }
9858
9859         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9860                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9861 }
9862
9863 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9864                                struct wireless_dev *wdev)
9865 {
9866         struct sk_buff *msg;
9867
9868         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9869         if (!msg)
9870                 return;
9871
9872         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9873                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9874                 nlmsg_free(msg);
9875                 return;
9876         }
9877
9878         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9879                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9880 }
9881
9882 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9883                                      struct net_device *netdev)
9884 {
9885         struct sk_buff *msg;
9886
9887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9888         if (!msg)
9889                 return;
9890
9891         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9892                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9893                 nlmsg_free(msg);
9894                 return;
9895         }
9896
9897         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9898                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9899 }
9900
9901 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9902                              struct net_device *netdev, u32 cmd)
9903 {
9904         struct sk_buff *msg;
9905
9906         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9907         if (!msg)
9908                 return;
9909
9910         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9911                 nlmsg_free(msg);
9912                 return;
9913         }
9914
9915         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9916                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9917 }
9918
9919 /*
9920  * This can happen on global regulatory changes or device specific settings
9921  * based on custom world regulatory domains.
9922  */
9923 void nl80211_send_reg_change_event(struct regulatory_request *request)
9924 {
9925         struct sk_buff *msg;
9926         void *hdr;
9927
9928         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9929         if (!msg)
9930                 return;
9931
9932         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9933         if (!hdr) {
9934                 nlmsg_free(msg);
9935                 return;
9936         }
9937
9938         /* Userspace can always count this one always being set */
9939         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9940                 goto nla_put_failure;
9941
9942         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9943                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9944                                NL80211_REGDOM_TYPE_WORLD))
9945                         goto nla_put_failure;
9946         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9947                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9948                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9949                         goto nla_put_failure;
9950         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9951                    request->intersect) {
9952                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9953                                NL80211_REGDOM_TYPE_INTERSECTION))
9954                         goto nla_put_failure;
9955         } else {
9956                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9957                                NL80211_REGDOM_TYPE_COUNTRY) ||
9958                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9959                                    request->alpha2))
9960                         goto nla_put_failure;
9961         }
9962
9963         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9964             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9965                 goto nla_put_failure;
9966
9967         genlmsg_end(msg, hdr);
9968
9969         rcu_read_lock();
9970         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9971                                 GFP_ATOMIC);
9972         rcu_read_unlock();
9973
9974         return;
9975
9976 nla_put_failure:
9977         genlmsg_cancel(msg, hdr);
9978         nlmsg_free(msg);
9979 }
9980
9981 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9982                                     struct net_device *netdev,
9983                                     const u8 *buf, size_t len,
9984                                     enum nl80211_commands cmd, gfp_t gfp)
9985 {
9986         struct sk_buff *msg;
9987         void *hdr;
9988
9989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9990         if (!msg)
9991                 return;
9992
9993         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9994         if (!hdr) {
9995                 nlmsg_free(msg);
9996                 return;
9997         }
9998
9999         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10000             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10001             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10002                 goto nla_put_failure;
10003
10004         genlmsg_end(msg, hdr);
10005
10006         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10007                                 nl80211_mlme_mcgrp.id, gfp);
10008         return;
10009
10010  nla_put_failure:
10011         genlmsg_cancel(msg, hdr);
10012         nlmsg_free(msg);
10013 }
10014
10015 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10016                           struct net_device *netdev, const u8 *buf,
10017                           size_t len, gfp_t gfp)
10018 {
10019         nl80211_send_mlme_event(rdev, netdev, buf, len,
10020                                 NL80211_CMD_AUTHENTICATE, gfp);
10021 }
10022
10023 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10024                            struct net_device *netdev, const u8 *buf,
10025                            size_t len, gfp_t gfp)
10026 {
10027         nl80211_send_mlme_event(rdev, netdev, buf, len,
10028                                 NL80211_CMD_ASSOCIATE, gfp);
10029 }
10030
10031 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10032                          struct net_device *netdev, const u8 *buf,
10033                          size_t len, gfp_t gfp)
10034 {
10035         nl80211_send_mlme_event(rdev, netdev, buf, len,
10036                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10037 }
10038
10039 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10040                            struct net_device *netdev, const u8 *buf,
10041                            size_t len, gfp_t gfp)
10042 {
10043         nl80211_send_mlme_event(rdev, netdev, buf, len,
10044                                 NL80211_CMD_DISASSOCIATE, gfp);
10045 }
10046
10047 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10048                                   size_t len)
10049 {
10050         struct wireless_dev *wdev = dev->ieee80211_ptr;
10051         struct wiphy *wiphy = wdev->wiphy;
10052         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10053         const struct ieee80211_mgmt *mgmt = (void *)buf;
10054         u32 cmd;
10055
10056         if (WARN_ON(len < 2))
10057                 return;
10058
10059         if (ieee80211_is_deauth(mgmt->frame_control))
10060                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10061         else
10062                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10063
10064         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10065         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10066 }
10067 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10068
10069 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10070                                       struct net_device *netdev, int cmd,
10071                                       const u8 *addr, gfp_t gfp)
10072 {
10073         struct sk_buff *msg;
10074         void *hdr;
10075
10076         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10077         if (!msg)
10078                 return;
10079
10080         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10081         if (!hdr) {
10082                 nlmsg_free(msg);
10083                 return;
10084         }
10085
10086         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10087             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10088             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10089             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10090                 goto nla_put_failure;
10091
10092         genlmsg_end(msg, hdr);
10093
10094         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10095                                 nl80211_mlme_mcgrp.id, gfp);
10096         return;
10097
10098  nla_put_failure:
10099         genlmsg_cancel(msg, hdr);
10100         nlmsg_free(msg);
10101 }
10102
10103 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10104                                struct net_device *netdev, const u8 *addr,
10105                                gfp_t gfp)
10106 {
10107         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10108                                   addr, gfp);
10109 }
10110
10111 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10112                                 struct net_device *netdev, const u8 *addr,
10113                                 gfp_t gfp)
10114 {
10115         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10116                                   addr, gfp);
10117 }
10118
10119 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10120                                  struct net_device *netdev, const u8 *bssid,
10121                                  const u8 *req_ie, size_t req_ie_len,
10122                                  const u8 *resp_ie, size_t resp_ie_len,
10123                                  u16 status, gfp_t gfp)
10124 {
10125         struct sk_buff *msg;
10126         void *hdr;
10127
10128         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10129         if (!msg)
10130                 return;
10131
10132         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10133         if (!hdr) {
10134                 nlmsg_free(msg);
10135                 return;
10136         }
10137
10138         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10139             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10140             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10141             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10142             (req_ie &&
10143              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10144             (resp_ie &&
10145              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10146                 goto nla_put_failure;
10147
10148         genlmsg_end(msg, hdr);
10149
10150         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10151                                 nl80211_mlme_mcgrp.id, gfp);
10152         return;
10153
10154  nla_put_failure:
10155         genlmsg_cancel(msg, hdr);
10156         nlmsg_free(msg);
10157
10158 }
10159
10160 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10161                          struct net_device *netdev, const u8 *bssid,
10162                          const u8 *req_ie, size_t req_ie_len,
10163                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10164 {
10165         struct sk_buff *msg;
10166         void *hdr;
10167
10168         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10169         if (!msg)
10170                 return;
10171
10172         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10173         if (!hdr) {
10174                 nlmsg_free(msg);
10175                 return;
10176         }
10177
10178         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10179             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10180             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10181             (req_ie &&
10182              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10183             (resp_ie &&
10184              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10185                 goto nla_put_failure;
10186
10187         genlmsg_end(msg, hdr);
10188
10189         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10190                                 nl80211_mlme_mcgrp.id, gfp);
10191         return;
10192
10193  nla_put_failure:
10194         genlmsg_cancel(msg, hdr);
10195         nlmsg_free(msg);
10196
10197 }
10198
10199 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10200                                struct net_device *netdev, u16 reason,
10201                                const u8 *ie, size_t ie_len, bool from_ap)
10202 {
10203         struct sk_buff *msg;
10204         void *hdr;
10205
10206         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10207         if (!msg)
10208                 return;
10209
10210         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10211         if (!hdr) {
10212                 nlmsg_free(msg);
10213                 return;
10214         }
10215
10216         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10217             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10218             (from_ap && reason &&
10219              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10220             (from_ap &&
10221              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10222             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10223                 goto nla_put_failure;
10224
10225         genlmsg_end(msg, hdr);
10226
10227         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10228                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10229         return;
10230
10231  nla_put_failure:
10232         genlmsg_cancel(msg, hdr);
10233         nlmsg_free(msg);
10234
10235 }
10236
10237 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10238                              struct net_device *netdev, const u8 *bssid,
10239                              gfp_t gfp)
10240 {
10241         struct sk_buff *msg;
10242         void *hdr;
10243
10244         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10245         if (!msg)
10246                 return;
10247
10248         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10249         if (!hdr) {
10250                 nlmsg_free(msg);
10251                 return;
10252         }
10253
10254         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10255             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10256             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10257                 goto nla_put_failure;
10258
10259         genlmsg_end(msg, hdr);
10260
10261         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10262                                 nl80211_mlme_mcgrp.id, gfp);
10263         return;
10264
10265  nla_put_failure:
10266         genlmsg_cancel(msg, hdr);
10267         nlmsg_free(msg);
10268 }
10269
10270 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10271                                         const u8* ie, u8 ie_len, gfp_t gfp)
10272 {
10273         struct wireless_dev *wdev = dev->ieee80211_ptr;
10274         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10275         struct sk_buff *msg;
10276         void *hdr;
10277
10278         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10279                 return;
10280
10281         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10282
10283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10284         if (!msg)
10285                 return;
10286
10287         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10288         if (!hdr) {
10289                 nlmsg_free(msg);
10290                 return;
10291         }
10292
10293         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10294             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10295             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10296             (ie_len && ie &&
10297              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10298                 goto nla_put_failure;
10299
10300         genlmsg_end(msg, hdr);
10301
10302         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10303                                 nl80211_mlme_mcgrp.id, gfp);
10304         return;
10305
10306  nla_put_failure:
10307         genlmsg_cancel(msg, hdr);
10308         nlmsg_free(msg);
10309 }
10310 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10311
10312 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10313                                  struct net_device *netdev, const u8 *addr,
10314                                  enum nl80211_key_type key_type, int key_id,
10315                                  const u8 *tsc, gfp_t gfp)
10316 {
10317         struct sk_buff *msg;
10318         void *hdr;
10319
10320         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10321         if (!msg)
10322                 return;
10323
10324         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10325         if (!hdr) {
10326                 nlmsg_free(msg);
10327                 return;
10328         }
10329
10330         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10331             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10332             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10333             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10334             (key_id != -1 &&
10335              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10336             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10337                 goto nla_put_failure;
10338
10339         genlmsg_end(msg, hdr);
10340
10341         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10342                                 nl80211_mlme_mcgrp.id, gfp);
10343         return;
10344
10345  nla_put_failure:
10346         genlmsg_cancel(msg, hdr);
10347         nlmsg_free(msg);
10348 }
10349
10350 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10351                                     struct ieee80211_channel *channel_before,
10352                                     struct ieee80211_channel *channel_after)
10353 {
10354         struct sk_buff *msg;
10355         void *hdr;
10356         struct nlattr *nl_freq;
10357
10358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10359         if (!msg)
10360                 return;
10361
10362         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10363         if (!hdr) {
10364                 nlmsg_free(msg);
10365                 return;
10366         }
10367
10368         /*
10369          * Since we are applying the beacon hint to a wiphy we know its
10370          * wiphy_idx is valid
10371          */
10372         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10373                 goto nla_put_failure;
10374
10375         /* Before */
10376         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10377         if (!nl_freq)
10378                 goto nla_put_failure;
10379         if (nl80211_msg_put_channel(msg, channel_before, false))
10380                 goto nla_put_failure;
10381         nla_nest_end(msg, nl_freq);
10382
10383         /* After */
10384         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10385         if (!nl_freq)
10386                 goto nla_put_failure;
10387         if (nl80211_msg_put_channel(msg, channel_after, false))
10388                 goto nla_put_failure;
10389         nla_nest_end(msg, nl_freq);
10390
10391         genlmsg_end(msg, hdr);
10392
10393         rcu_read_lock();
10394         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
10395                                 GFP_ATOMIC);
10396         rcu_read_unlock();
10397
10398         return;
10399
10400 nla_put_failure:
10401         genlmsg_cancel(msg, hdr);
10402         nlmsg_free(msg);
10403 }
10404
10405 static void nl80211_send_remain_on_chan_event(
10406         int cmd, struct cfg80211_registered_device *rdev,
10407         struct wireless_dev *wdev, u64 cookie,
10408         struct ieee80211_channel *chan,
10409         unsigned int duration, gfp_t gfp)
10410 {
10411         struct sk_buff *msg;
10412         void *hdr;
10413
10414         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10415         if (!msg)
10416                 return;
10417
10418         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10419         if (!hdr) {
10420                 nlmsg_free(msg);
10421                 return;
10422         }
10423
10424         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10425             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10426                                          wdev->netdev->ifindex)) ||
10427             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10428             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10429             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10430                         NL80211_CHAN_NO_HT) ||
10431             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10432                 goto nla_put_failure;
10433
10434         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10435             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10436                 goto nla_put_failure;
10437
10438         genlmsg_end(msg, hdr);
10439
10440         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10441                                 nl80211_mlme_mcgrp.id, gfp);
10442         return;
10443
10444  nla_put_failure:
10445         genlmsg_cancel(msg, hdr);
10446         nlmsg_free(msg);
10447 }
10448
10449 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10450                                struct ieee80211_channel *chan,
10451                                unsigned int duration, gfp_t gfp)
10452 {
10453         struct wiphy *wiphy = wdev->wiphy;
10454         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10455
10456         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10457         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10458                                           rdev, wdev, cookie, chan,
10459                                           duration, gfp);
10460 }
10461 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10462
10463 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10464                                         struct ieee80211_channel *chan,
10465                                         gfp_t gfp)
10466 {
10467         struct wiphy *wiphy = wdev->wiphy;
10468         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10469
10470         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10471         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10472                                           rdev, wdev, cookie, chan, 0, gfp);
10473 }
10474 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10475
10476 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10477                       struct station_info *sinfo, gfp_t gfp)
10478 {
10479         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10480         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10481         struct sk_buff *msg;
10482
10483         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10484
10485         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10486         if (!msg)
10487                 return;
10488
10489         if (nl80211_send_station(msg, 0, 0, 0,
10490                                  rdev, dev, mac_addr, sinfo) < 0) {
10491                 nlmsg_free(msg);
10492                 return;
10493         }
10494
10495         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10496                                 nl80211_mlme_mcgrp.id, gfp);
10497 }
10498 EXPORT_SYMBOL(cfg80211_new_sta);
10499
10500 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10501 {
10502         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10503         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10504         struct sk_buff *msg;
10505         void *hdr;
10506
10507         trace_cfg80211_del_sta(dev, mac_addr);
10508
10509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10510         if (!msg)
10511                 return;
10512
10513         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10514         if (!hdr) {
10515                 nlmsg_free(msg);
10516                 return;
10517         }
10518
10519         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10520             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10521                 goto nla_put_failure;
10522
10523         genlmsg_end(msg, hdr);
10524
10525         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10526                                 nl80211_mlme_mcgrp.id, gfp);
10527         return;
10528
10529  nla_put_failure:
10530         genlmsg_cancel(msg, hdr);
10531         nlmsg_free(msg);
10532 }
10533 EXPORT_SYMBOL(cfg80211_del_sta);
10534
10535 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10536                           enum nl80211_connect_failed_reason reason,
10537                           gfp_t gfp)
10538 {
10539         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10540         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10541         struct sk_buff *msg;
10542         void *hdr;
10543
10544         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10545         if (!msg)
10546                 return;
10547
10548         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10549         if (!hdr) {
10550                 nlmsg_free(msg);
10551                 return;
10552         }
10553
10554         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10555             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10556             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10557                 goto nla_put_failure;
10558
10559         genlmsg_end(msg, hdr);
10560
10561         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10562                                 nl80211_mlme_mcgrp.id, gfp);
10563         return;
10564
10565  nla_put_failure:
10566         genlmsg_cancel(msg, hdr);
10567         nlmsg_free(msg);
10568 }
10569 EXPORT_SYMBOL(cfg80211_conn_failed);
10570
10571 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10572                                        const u8 *addr, gfp_t gfp)
10573 {
10574         struct wireless_dev *wdev = dev->ieee80211_ptr;
10575         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10576         struct sk_buff *msg;
10577         void *hdr;
10578         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10579
10580         if (!nlportid)
10581                 return false;
10582
10583         msg = nlmsg_new(100, gfp);
10584         if (!msg)
10585                 return true;
10586
10587         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10588         if (!hdr) {
10589                 nlmsg_free(msg);
10590                 return true;
10591         }
10592
10593         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10594             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10595             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10596                 goto nla_put_failure;
10597
10598         genlmsg_end(msg, hdr);
10599         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10600         return true;
10601
10602  nla_put_failure:
10603         genlmsg_cancel(msg, hdr);
10604         nlmsg_free(msg);
10605         return true;
10606 }
10607
10608 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10609                                 const u8 *addr, gfp_t gfp)
10610 {
10611         struct wireless_dev *wdev = dev->ieee80211_ptr;
10612         bool ret;
10613
10614         trace_cfg80211_rx_spurious_frame(dev, addr);
10615
10616         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10617                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10618                 trace_cfg80211_return_bool(false);
10619                 return false;
10620         }
10621         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10622                                          addr, gfp);
10623         trace_cfg80211_return_bool(ret);
10624         return ret;
10625 }
10626 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10627
10628 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10629                                         const u8 *addr, gfp_t gfp)
10630 {
10631         struct wireless_dev *wdev = dev->ieee80211_ptr;
10632         bool ret;
10633
10634         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10635
10636         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10637                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10638                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10639                 trace_cfg80211_return_bool(false);
10640                 return false;
10641         }
10642         ret = __nl80211_unexpected_frame(dev,
10643                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10644                                          addr, gfp);
10645         trace_cfg80211_return_bool(ret);
10646         return ret;
10647 }
10648 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10649
10650 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10651                       struct wireless_dev *wdev, u32 nlportid,
10652                       int freq, int sig_dbm,
10653                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10654 {
10655         struct net_device *netdev = wdev->netdev;
10656         struct sk_buff *msg;
10657         void *hdr;
10658
10659         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10660         if (!msg)
10661                 return -ENOMEM;
10662
10663         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10664         if (!hdr) {
10665                 nlmsg_free(msg);
10666                 return -ENOMEM;
10667         }
10668
10669         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10670             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10671                                         netdev->ifindex)) ||
10672             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10673             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10674             (sig_dbm &&
10675              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10676             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10677             (flags &&
10678              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10679                 goto nla_put_failure;
10680
10681         genlmsg_end(msg, hdr);
10682
10683         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10684
10685  nla_put_failure:
10686         genlmsg_cancel(msg, hdr);
10687         nlmsg_free(msg);
10688         return -ENOBUFS;
10689 }
10690
10691 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10692                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10693 {
10694         struct wiphy *wiphy = wdev->wiphy;
10695         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10696         struct net_device *netdev = wdev->netdev;
10697         struct sk_buff *msg;
10698         void *hdr;
10699
10700         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10701
10702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10703         if (!msg)
10704                 return;
10705
10706         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10707         if (!hdr) {
10708                 nlmsg_free(msg);
10709                 return;
10710         }
10711
10712         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10713             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10714                                    netdev->ifindex)) ||
10715             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10716             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10717             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10718             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10719                 goto nla_put_failure;
10720
10721         genlmsg_end(msg, hdr);
10722
10723         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10724                                 nl80211_mlme_mcgrp.id, gfp);
10725         return;
10726
10727  nla_put_failure:
10728         genlmsg_cancel(msg, hdr);
10729         nlmsg_free(msg);
10730 }
10731 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10732
10733 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10734                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10735                               gfp_t gfp)
10736 {
10737         struct wireless_dev *wdev = dev->ieee80211_ptr;
10738         struct wiphy *wiphy = wdev->wiphy;
10739         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10740         struct sk_buff *msg;
10741         struct nlattr *pinfoattr;
10742         void *hdr;
10743
10744         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10745
10746         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10747         if (!msg)
10748                 return;
10749
10750         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10751         if (!hdr) {
10752                 nlmsg_free(msg);
10753                 return;
10754         }
10755
10756         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10757             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10758                 goto nla_put_failure;
10759
10760         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10761         if (!pinfoattr)
10762                 goto nla_put_failure;
10763
10764         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10765                         rssi_event))
10766                 goto nla_put_failure;
10767
10768         nla_nest_end(msg, pinfoattr);
10769
10770         genlmsg_end(msg, hdr);
10771
10772         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10773                                 nl80211_mlme_mcgrp.id, gfp);
10774         return;
10775
10776  nla_put_failure:
10777         genlmsg_cancel(msg, hdr);
10778         nlmsg_free(msg);
10779 }
10780 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10781
10782 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10783                                      struct net_device *netdev, const u8 *bssid,
10784                                      const u8 *replay_ctr, gfp_t gfp)
10785 {
10786         struct sk_buff *msg;
10787         struct nlattr *rekey_attr;
10788         void *hdr;
10789
10790         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10791         if (!msg)
10792                 return;
10793
10794         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10795         if (!hdr) {
10796                 nlmsg_free(msg);
10797                 return;
10798         }
10799
10800         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10801             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10802             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10803                 goto nla_put_failure;
10804
10805         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10806         if (!rekey_attr)
10807                 goto nla_put_failure;
10808
10809         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10810                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10811                 goto nla_put_failure;
10812
10813         nla_nest_end(msg, rekey_attr);
10814
10815         genlmsg_end(msg, hdr);
10816
10817         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10818                                 nl80211_mlme_mcgrp.id, gfp);
10819         return;
10820
10821  nla_put_failure:
10822         genlmsg_cancel(msg, hdr);
10823         nlmsg_free(msg);
10824 }
10825
10826 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10827                                const u8 *replay_ctr, gfp_t gfp)
10828 {
10829         struct wireless_dev *wdev = dev->ieee80211_ptr;
10830         struct wiphy *wiphy = wdev->wiphy;
10831         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10832
10833         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10834         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10835 }
10836 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10837
10838 static void
10839 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10840                                struct net_device *netdev, int index,
10841                                const u8 *bssid, bool preauth, gfp_t gfp)
10842 {
10843         struct sk_buff *msg;
10844         struct nlattr *attr;
10845         void *hdr;
10846
10847         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10848         if (!msg)
10849                 return;
10850
10851         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10852         if (!hdr) {
10853                 nlmsg_free(msg);
10854                 return;
10855         }
10856
10857         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10858             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10859                 goto nla_put_failure;
10860
10861         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10862         if (!attr)
10863                 goto nla_put_failure;
10864
10865         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10866             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10867             (preauth &&
10868              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10869                 goto nla_put_failure;
10870
10871         nla_nest_end(msg, attr);
10872
10873         genlmsg_end(msg, hdr);
10874
10875         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10876                                 nl80211_mlme_mcgrp.id, gfp);
10877         return;
10878
10879  nla_put_failure:
10880         genlmsg_cancel(msg, hdr);
10881         nlmsg_free(msg);
10882 }
10883
10884 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10885                                      const u8 *bssid, bool preauth, gfp_t gfp)
10886 {
10887         struct wireless_dev *wdev = dev->ieee80211_ptr;
10888         struct wiphy *wiphy = wdev->wiphy;
10889         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10890
10891         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10892         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10893 }
10894 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10895
10896 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10897                                      struct net_device *netdev,
10898                                      struct cfg80211_chan_def *chandef,
10899                                      gfp_t gfp)
10900 {
10901         struct sk_buff *msg;
10902         void *hdr;
10903
10904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10905         if (!msg)
10906                 return;
10907
10908         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10909         if (!hdr) {
10910                 nlmsg_free(msg);
10911                 return;
10912         }
10913
10914         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10915                 goto nla_put_failure;
10916
10917         if (nl80211_send_chandef(msg, chandef))
10918                 goto nla_put_failure;
10919
10920         genlmsg_end(msg, hdr);
10921
10922         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10923                                 nl80211_mlme_mcgrp.id, gfp);
10924         return;
10925
10926  nla_put_failure:
10927         genlmsg_cancel(msg, hdr);
10928         nlmsg_free(msg);
10929 }
10930
10931 void cfg80211_ch_switch_notify(struct net_device *dev,
10932                                struct cfg80211_chan_def *chandef)
10933 {
10934         struct wireless_dev *wdev = dev->ieee80211_ptr;
10935         struct wiphy *wiphy = wdev->wiphy;
10936         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10937
10938         ASSERT_WDEV_LOCK(wdev);
10939
10940         trace_cfg80211_ch_switch_notify(dev, chandef);
10941
10942         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10943                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10944                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
10945                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10946                 return;
10947
10948         wdev->channel = chandef->chan;
10949         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10950 }
10951 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10952
10953 void cfg80211_cqm_txe_notify(struct net_device *dev,
10954                              const u8 *peer, u32 num_packets,
10955                              u32 rate, u32 intvl, gfp_t gfp)
10956 {
10957         struct wireless_dev *wdev = dev->ieee80211_ptr;
10958         struct wiphy *wiphy = wdev->wiphy;
10959         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10960         struct sk_buff *msg;
10961         struct nlattr *pinfoattr;
10962         void *hdr;
10963
10964         msg = nlmsg_new(NLMSG_GOODSIZE, 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_TXE_PKTS, num_packets))
10984                 goto nla_put_failure;
10985
10986         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10987                 goto nla_put_failure;
10988
10989         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10990                 goto nla_put_failure;
10991
10992         nla_nest_end(msg, pinfoattr);
10993
10994         genlmsg_end(msg, hdr);
10995
10996         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10997                                 nl80211_mlme_mcgrp.id, gfp);
10998         return;
10999
11000  nla_put_failure:
11001         genlmsg_cancel(msg, hdr);
11002         nlmsg_free(msg);
11003 }
11004 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11005
11006 void
11007 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11008                      const struct cfg80211_chan_def *chandef,
11009                      enum nl80211_radar_event event,
11010                      struct net_device *netdev, gfp_t gfp)
11011 {
11012         struct sk_buff *msg;
11013         void *hdr;
11014
11015         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11016         if (!msg)
11017                 return;
11018
11019         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11020         if (!hdr) {
11021                 nlmsg_free(msg);
11022                 return;
11023         }
11024
11025         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11026                 goto nla_put_failure;
11027
11028         /* NOP and radar events don't need a netdev parameter */
11029         if (netdev) {
11030                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11031
11032                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11033                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11034                         goto nla_put_failure;
11035         }
11036
11037         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11038                 goto nla_put_failure;
11039
11040         if (nl80211_send_chandef(msg, chandef))
11041                 goto nla_put_failure;
11042
11043         genlmsg_end(msg, hdr);
11044
11045         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11046                                 nl80211_mlme_mcgrp.id, gfp);
11047         return;
11048
11049  nla_put_failure:
11050         genlmsg_cancel(msg, hdr);
11051         nlmsg_free(msg);
11052 }
11053
11054 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11055                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11056 {
11057         struct wireless_dev *wdev = dev->ieee80211_ptr;
11058         struct wiphy *wiphy = wdev->wiphy;
11059         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11060         struct sk_buff *msg;
11061         struct nlattr *pinfoattr;
11062         void *hdr;
11063
11064         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11065
11066         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11067         if (!msg)
11068                 return;
11069
11070         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11071         if (!hdr) {
11072                 nlmsg_free(msg);
11073                 return;
11074         }
11075
11076         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11077             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11078             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11079                 goto nla_put_failure;
11080
11081         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11082         if (!pinfoattr)
11083                 goto nla_put_failure;
11084
11085         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11086                 goto nla_put_failure;
11087
11088         nla_nest_end(msg, pinfoattr);
11089
11090         genlmsg_end(msg, hdr);
11091
11092         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11093                                 nl80211_mlme_mcgrp.id, gfp);
11094         return;
11095
11096  nla_put_failure:
11097         genlmsg_cancel(msg, hdr);
11098         nlmsg_free(msg);
11099 }
11100 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11101
11102 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11103                            u64 cookie, bool acked, gfp_t gfp)
11104 {
11105         struct wireless_dev *wdev = dev->ieee80211_ptr;
11106         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11107         struct sk_buff *msg;
11108         void *hdr;
11109
11110         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11111
11112         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11113
11114         if (!msg)
11115                 return;
11116
11117         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11118         if (!hdr) {
11119                 nlmsg_free(msg);
11120                 return;
11121         }
11122
11123         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11124             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11125             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11126             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11127             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11128                 goto nla_put_failure;
11129
11130         genlmsg_end(msg, hdr);
11131
11132         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11133                                 nl80211_mlme_mcgrp.id, gfp);
11134         return;
11135
11136  nla_put_failure:
11137         genlmsg_cancel(msg, hdr);
11138         nlmsg_free(msg);
11139 }
11140 EXPORT_SYMBOL(cfg80211_probe_status);
11141
11142 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11143                                  const u8 *frame, size_t len,
11144                                  int freq, int sig_dbm)
11145 {
11146         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11147         struct sk_buff *msg;
11148         void *hdr;
11149         struct cfg80211_beacon_registration *reg;
11150
11151         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11152
11153         spin_lock_bh(&rdev->beacon_registrations_lock);
11154         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11155                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11156                 if (!msg) {
11157                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11158                         return;
11159                 }
11160
11161                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11162                 if (!hdr)
11163                         goto nla_put_failure;
11164
11165                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11166                     (freq &&
11167                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11168                     (sig_dbm &&
11169                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11170                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11171                         goto nla_put_failure;
11172
11173                 genlmsg_end(msg, hdr);
11174
11175                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11176         }
11177         spin_unlock_bh(&rdev->beacon_registrations_lock);
11178         return;
11179
11180  nla_put_failure:
11181         spin_unlock_bh(&rdev->beacon_registrations_lock);
11182         if (hdr)
11183                 genlmsg_cancel(msg, hdr);
11184         nlmsg_free(msg);
11185 }
11186 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11187
11188 #ifdef CONFIG_PM
11189 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11190                                    struct cfg80211_wowlan_wakeup *wakeup,
11191                                    gfp_t gfp)
11192 {
11193         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11194         struct sk_buff *msg;
11195         void *hdr;
11196         int size = 200;
11197
11198         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11199
11200         if (wakeup)
11201                 size += wakeup->packet_present_len;
11202
11203         msg = nlmsg_new(size, gfp);
11204         if (!msg)
11205                 return;
11206
11207         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11208         if (!hdr)
11209                 goto free_msg;
11210
11211         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11212             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11213                 goto free_msg;
11214
11215         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11216                                         wdev->netdev->ifindex))
11217                 goto free_msg;
11218
11219         if (wakeup) {
11220                 struct nlattr *reasons;
11221
11222                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11223
11224                 if (wakeup->disconnect &&
11225                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11226                         goto free_msg;
11227                 if (wakeup->magic_pkt &&
11228                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11229                         goto free_msg;
11230                 if (wakeup->gtk_rekey_failure &&
11231                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11232                         goto free_msg;
11233                 if (wakeup->eap_identity_req &&
11234                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11235                         goto free_msg;
11236                 if (wakeup->four_way_handshake &&
11237                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11238                         goto free_msg;
11239                 if (wakeup->rfkill_release &&
11240                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11241                         goto free_msg;
11242
11243                 if (wakeup->pattern_idx >= 0 &&
11244                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11245                                 wakeup->pattern_idx))
11246                         goto free_msg;
11247
11248                 if (wakeup->tcp_match)
11249                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
11250
11251                 if (wakeup->tcp_connlost)
11252                         nla_put_flag(msg,
11253                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
11254
11255                 if (wakeup->tcp_nomoretokens)
11256                         nla_put_flag(msg,
11257                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
11258
11259                 if (wakeup->packet) {
11260                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11261                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11262
11263                         if (!wakeup->packet_80211) {
11264                                 pkt_attr =
11265                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11266                                 len_attr =
11267                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11268                         }
11269
11270                         if (wakeup->packet_len &&
11271                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11272                                 goto free_msg;
11273
11274                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11275                                     wakeup->packet))
11276                                 goto free_msg;
11277                 }
11278
11279                 nla_nest_end(msg, reasons);
11280         }
11281
11282         genlmsg_end(msg, hdr);
11283
11284         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11285                                 nl80211_mlme_mcgrp.id, gfp);
11286         return;
11287
11288  free_msg:
11289         nlmsg_free(msg);
11290 }
11291 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11292 #endif
11293
11294 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11295                                 enum nl80211_tdls_operation oper,
11296                                 u16 reason_code, gfp_t gfp)
11297 {
11298         struct wireless_dev *wdev = dev->ieee80211_ptr;
11299         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11300         struct sk_buff *msg;
11301         void *hdr;
11302
11303         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11304                                          reason_code);
11305
11306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11307         if (!msg)
11308                 return;
11309
11310         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11311         if (!hdr) {
11312                 nlmsg_free(msg);
11313                 return;
11314         }
11315
11316         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11317             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11318             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11319             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11320             (reason_code > 0 &&
11321              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11322                 goto nla_put_failure;
11323
11324         genlmsg_end(msg, hdr);
11325
11326         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11327                                 nl80211_mlme_mcgrp.id, gfp);
11328         return;
11329
11330  nla_put_failure:
11331         genlmsg_cancel(msg, hdr);
11332         nlmsg_free(msg);
11333 }
11334 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11335
11336 static int nl80211_netlink_notify(struct notifier_block * nb,
11337                                   unsigned long state,
11338                                   void *_notify)
11339 {
11340         struct netlink_notify *notify = _notify;
11341         struct cfg80211_registered_device *rdev;
11342         struct wireless_dev *wdev;
11343         struct cfg80211_beacon_registration *reg, *tmp;
11344
11345         if (state != NETLINK_URELEASE)
11346                 return NOTIFY_DONE;
11347
11348         rcu_read_lock();
11349
11350         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11351                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11352                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11353
11354                 spin_lock_bh(&rdev->beacon_registrations_lock);
11355                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11356                                          list) {
11357                         if (reg->nlportid == notify->portid) {
11358                                 list_del(&reg->list);
11359                                 kfree(reg);
11360                                 break;
11361                         }
11362                 }
11363                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11364         }
11365
11366         rcu_read_unlock();
11367
11368         return NOTIFY_DONE;
11369 }
11370
11371 static struct notifier_block nl80211_netlink_notifier = {
11372         .notifier_call = nl80211_netlink_notify,
11373 };
11374
11375 void cfg80211_ft_event(struct net_device *netdev,
11376                        struct cfg80211_ft_event_params *ft_event)
11377 {
11378         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11379         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11380         struct sk_buff *msg;
11381         void *hdr;
11382
11383         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11384
11385         if (!ft_event->target_ap)
11386                 return;
11387
11388         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11389         if (!msg)
11390                 return;
11391
11392         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11393         if (!hdr) {
11394                 nlmsg_free(msg);
11395                 return;
11396         }
11397
11398         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
11399         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
11400         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
11401         if (ft_event->ies)
11402                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
11403         if (ft_event->ric_ies)
11404                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11405                         ft_event->ric_ies);
11406
11407         genlmsg_end(msg, hdr);
11408
11409         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11410                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
11411 }
11412 EXPORT_SYMBOL(cfg80211_ft_event);
11413
11414 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11415 {
11416         struct cfg80211_registered_device *rdev;
11417         struct sk_buff *msg;
11418         void *hdr;
11419         u32 nlportid;
11420
11421         rdev = wiphy_to_dev(wdev->wiphy);
11422         if (!rdev->crit_proto_nlportid)
11423                 return;
11424
11425         nlportid = rdev->crit_proto_nlportid;
11426         rdev->crit_proto_nlportid = 0;
11427
11428         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11429         if (!msg)
11430                 return;
11431
11432         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11433         if (!hdr)
11434                 goto nla_put_failure;
11435
11436         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11437             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11438                 goto nla_put_failure;
11439
11440         genlmsg_end(msg, hdr);
11441
11442         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11443         return;
11444
11445  nla_put_failure:
11446         if (hdr)
11447                 genlmsg_cancel(msg, hdr);
11448         nlmsg_free(msg);
11449
11450 }
11451 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11452
11453 /* initialisation/exit functions */
11454
11455 int nl80211_init(void)
11456 {
11457         int err;
11458
11459         err = genl_register_family_with_ops(&nl80211_fam,
11460                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
11461         if (err)
11462                 return err;
11463
11464         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
11465         if (err)
11466                 goto err_out;
11467
11468         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
11469         if (err)
11470                 goto err_out;
11471
11472         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
11473         if (err)
11474                 goto err_out;
11475
11476         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
11477         if (err)
11478                 goto err_out;
11479
11480 #ifdef CONFIG_NL80211_TESTMODE
11481         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
11482         if (err)
11483                 goto err_out;
11484 #endif
11485
11486         err = netlink_register_notifier(&nl80211_netlink_notifier);
11487         if (err)
11488                 goto err_out;
11489
11490         return 0;
11491  err_out:
11492         genl_unregister_family(&nl80211_fam);
11493         return err;
11494 }
11495
11496 void nl80211_exit(void)
11497 {
11498         netlink_unregister_notifier(&nl80211_netlink_notifier);
11499         genl_unregister_family(&nl80211_fam);
11500 }