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 };
 358
 359 /* policy for the key attributes */
 360 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 361         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 362         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 363         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 364         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 365         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 366         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 367         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 368         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 369 };
 370
 371 /* policy for the key default flags */
 372 static const struct nla_policy
 373 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 374         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 375         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 376 };
 377
 378 /* policy for WoWLAN attributes */
 379 static const struct nla_policy
 380 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 381         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 385         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 386         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 387         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 388         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 389         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 390 };
 391
 392 static const struct nla_policy
 393 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 394         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 395         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 396         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 397         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 398         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 399         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 400         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 401                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 402         },
 403         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 404                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 405         },
 406         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 407         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 408         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 409 };
 410
 411 /* policy for coalesce rule attributes */
 412 static const struct nla_policy
 413 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 414         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 415         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 416         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 417 };
 418
 419 /* policy for GTK rekey offload attributes */
 420 static const struct nla_policy
 421 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 422         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 423         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 424         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 425 };
 426
 427 static const struct nla_policy
 428 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 429         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 430                                                  .len = IEEE80211_MAX_SSID_LEN },
 431         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 432 };
 433
 434 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 435                                      struct netlink_callback *cb,
 436                                      struct cfg80211_registered_device **rdev,
 437                                      struct wireless_dev **wdev)
 438 {
 439         int err;
 440
 441         rtnl_lock();
 442
 443         if (!cb->args[0]) {
 444                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 445                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 446                                   nl80211_policy);
 447                 if (err)
 448                         goto out_unlock;
 449
 450                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 451                                                    nl80211_fam.attrbuf);
 452                 if (IS_ERR(*wdev)) {
 453                         err = PTR_ERR(*wdev);
 454                         goto out_unlock;
 455                 }
 456                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 457                 /* 0 is the first index - add 1 to parse only once */
 458                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 459                 cb->args[1] = (*wdev)->identifier;
 460         } else {
 461                 /* subtract the 1 again here */
 462                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 463                 struct wireless_dev *tmp;
 464
 465                 if (!wiphy) {
 466                         err = -ENODEV;
 467                         goto out_unlock;
 468                 }
 469                 *rdev = wiphy_to_dev(wiphy);
 470                 *wdev = NULL;
 471
 472                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 473                         if (tmp->identifier == cb->args[1]) {
 474                                 *wdev = tmp;
 475                                 break;
 476                         }
 477                 }
 478
 479                 if (!*wdev) {
 480                         err = -ENODEV;
 481                         goto out_unlock;
 482                 }
 483         }
 484
 485         return 0;
 486  out_unlock:
 487         rtnl_unlock();
 488         return err;
 489 }
 490
 491 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 492 {
 493         rtnl_unlock();
 494 }
 495
 496 /* IE validation */
 497 static bool is_valid_ie_attr(const struct nlattr *attr)
 498 {
 499         const u8 *pos;
 500         int len;
 501
 502         if (!attr)
 503                 return true;
 504
 505         pos = nla_data(attr);
 506         len = nla_len(attr);
 507
 508         while (len) {
 509                 u8 elemlen;
 510
 511                 if (len < 2)
 512                         return false;
 513                 len -= 2;
 514
 515                 elemlen = pos[1];
 516                 if (elemlen > len)
 517                         return false;
 518
 519                 len -= elemlen;
 520                 pos += 2 + elemlen;
 521         }
 522
 523         return true;
 524 }
 525
 526 /* message building helper */
 527 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 528                                    int flags, u8 cmd)
 529 {
 530         /* since there is no private header just add the generic one */
 531         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 532 }
 533
 534 static int nl80211_msg_put_channel(struct sk_buff *msg,
 535                                    struct ieee80211_channel *chan,
 536                                    bool large)
 537 {
 538         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 539                         chan->center_freq))
 540                 goto nla_put_failure;
 541
 542         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 543             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 544                 goto nla_put_failure;
 545         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 546             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 547                 goto nla_put_failure;
 548         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 549             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 550                 goto nla_put_failure;
 551         if (chan->flags & IEEE80211_CHAN_RADAR) {
 552                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 553                         goto nla_put_failure;
 554                 if (large) {
 555                         u32 time;
 556
 557                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 558
 559                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 560                                         chan->dfs_state))
 561                                 goto nla_put_failure;
 562                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 563                                         time))
 564                                 goto nla_put_failure;
 565                 }
 566         }
 567
 568         if (large) {
 569                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 570                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 571                         goto nla_put_failure;
 572                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 573                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 574                         goto nla_put_failure;
 575                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 576                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 577                         goto nla_put_failure;
 578                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 579                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 580                         goto nla_put_failure;
 581         }
 582
 583         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 584                         DBM_TO_MBM(chan->max_power)))
 585                 goto nla_put_failure;
 586
 587         return 0;
 588
 589  nla_put_failure:
 590         return -ENOBUFS;
 591 }
 592
 593 /* netlink command implementations */
 594
 595 struct key_parse {
 596         struct key_params p;
 597         int idx;
 598         int type;
 599         bool def, defmgmt;
 600         bool def_uni, def_multi;
 601 };
 602
 603 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 604 {
 605         struct nlattr *tb[NL80211_KEY_MAX + 1];
 606         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 607                                    nl80211_key_policy);
 608         if (err)
 609                 return err;
 610
 611         k->def = !!tb[NL80211_KEY_DEFAULT];
 612         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 613
 614         if (k->def) {
 615                 k->def_uni = true;
 616                 k->def_multi = true;
 617         }
 618         if (k->defmgmt)
 619                 k->def_multi = true;
 620
 621         if (tb[NL80211_KEY_IDX])
 622                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 623
 624         if (tb[NL80211_KEY_DATA]) {
 625                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 626                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 627         }
 628
 629         if (tb[NL80211_KEY_SEQ]) {
 630                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 631                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 632         }
 633
 634         if (tb[NL80211_KEY_CIPHER])
 635                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 636
 637         if (tb[NL80211_KEY_TYPE]) {
 638                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 639                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 640                         return -EINVAL;
 641         }
 642
 643         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 644                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 645                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 646                                        tb[NL80211_KEY_DEFAULT_TYPES],
 647                                        nl80211_key_default_policy);
 648                 if (err)
 649                         return err;
 650
 651                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 652                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 653         }
 654
 655         return 0;
 656 }
 657
 658 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 659 {
 660         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 661                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 662                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 663         }
 664
 665         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 666                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 667                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 668         }
 669
 670         if (info->attrs[NL80211_ATTR_KEY_IDX])
 671                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 672
 673         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 674                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 675
 676         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 677         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 678
 679         if (k->def) {
 680                 k->def_uni = true;
 681                 k->def_multi = true;
 682         }
 683         if (k->defmgmt)
 684                 k->def_multi = true;
 685
 686         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 687                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 688                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 689                         return -EINVAL;
 690         }
 691
 692         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 693                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 694                 int err = nla_parse_nested(
 695                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 696                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 697                                 nl80211_key_default_policy);
 698                 if (err)
 699                         return err;
 700
 701                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 702                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 703         }
 704
 705         return 0;
 706 }
 707
 708 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 709 {
 710         int err;
 711
 712         memset(k, 0, sizeof(*k));
 713         k->idx = -1;
 714         k->type = -1;
 715
 716         if (info->attrs[NL80211_ATTR_KEY])
 717                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 718         else
 719                 err = nl80211_parse_key_old(info, k);
 720
 721         if (err)
 722                 return err;
 723
 724         if (k->def && k->defmgmt)
 725                 return -EINVAL;
 726
 727         if (k->defmgmt) {
 728                 if (k->def_uni || !k->def_multi)
 729                         return -EINVAL;
 730         }
 731
 732         if (k->idx != -1) {
 733                 if (k->defmgmt) {
 734                         if (k->idx < 4 || k->idx > 5)
 735                                 return -EINVAL;
 736                 } else if (k->def) {
 737                         if (k->idx < 0 || k->idx > 3)
 738                                 return -EINVAL;
 739                 } else {
 740                         if (k->idx < 0 || k->idx > 5)
 741                                 return -EINVAL;
 742                 }
 743         }
 744
 745         return 0;
 746 }
 747
 748 static struct cfg80211_cached_keys *
 749 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 750                        struct nlattr *keys, bool *no_ht)
 751 {
 752         struct key_parse parse;
 753         struct nlattr *key;
 754         struct cfg80211_cached_keys *result;
 755         int rem, err, def = 0;
 756
 757         result = kzalloc(sizeof(*result), GFP_KERNEL);
 758         if (!result)
 759                 return ERR_PTR(-ENOMEM);
 760
 761         result->def = -1;
 762         result->defmgmt = -1;
 763
 764         nla_for_each_nested(key, keys, rem) {
 765                 memset(&parse, 0, sizeof(parse));
 766                 parse.idx = -1;
 767
 768                 err = nl80211_parse_key_new(key, &parse);
 769                 if (err)
 770                         goto error;
 771                 err = -EINVAL;
 772                 if (!parse.p.key)
 773                         goto error;
 774                 if (parse.idx < 0 || parse.idx > 4)
 775                         goto error;
 776                 if (parse.def) {
 777                         if (def)
 778                                 goto error;
 779                         def = 1;
 780                         result->def = parse.idx;
 781                         if (!parse.def_uni || !parse.def_multi)
 782                                 goto error;
 783                 } else if (parse.defmgmt)
 784                         goto error;
 785                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 786                                                      parse.idx, false, NULL);
 787                 if (err)
 788                         goto error;
 789                 result->params[parse.idx].cipher = parse.p.cipher;
 790                 result->params[parse.idx].key_len = parse.p.key_len;
 791                 result->params[parse.idx].key = result->data[parse.idx];
 792                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 793
 794                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 795                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 796                         if (no_ht)
 797                                 *no_ht = true;
 798                 }
 799         }
 800
 801         return result;
 802  error:
 803         kfree(result);
 804         return ERR_PTR(err);
 805 }
 806
 807 static int nl80211_key_allowed(struct wireless_dev *wdev)
 808 {
 809         ASSERT_WDEV_LOCK(wdev);
 810
 811         switch (wdev->iftype) {
 812         case NL80211_IFTYPE_AP:
 813         case NL80211_IFTYPE_AP_VLAN:
 814         case NL80211_IFTYPE_P2P_GO:
 815         case NL80211_IFTYPE_MESH_POINT:
 816                 break;
 817         case NL80211_IFTYPE_ADHOC:
 818         case NL80211_IFTYPE_STATION:
 819         case NL80211_IFTYPE_P2P_CLIENT:
 820                 if (!wdev->current_bss)
 821                         return -ENOLINK;
 822                 break;
 823         default:
 824                 return -EINVAL;
 825         }
 826
 827         return 0;
 828 }
 829
 830 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 831 {
 832         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 833         int i;
 834
 835         if (!nl_modes)
 836                 goto nla_put_failure;
 837
 838         i = 0;
 839         while (ifmodes) {
 840                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 841                         goto nla_put_failure;
 842                 ifmodes >>= 1;
 843                 i++;
 844         }
 845
 846         nla_nest_end(msg, nl_modes);
 847         return 0;
 848
 849 nla_put_failure:
 850         return -ENOBUFS;
 851 }
 852
 853 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 854                                           struct sk_buff *msg,
 855                                           bool large)
 856 {
 857         struct nlattr *nl_combis;
 858         int i, j;
 859
 860         nl_combis = nla_nest_start(msg,
 861                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 862         if (!nl_combis)
 863                 goto nla_put_failure;
 864
 865         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 866                 const struct ieee80211_iface_combination *c;
 867                 struct nlattr *nl_combi, *nl_limits;
 868
 869                 c = &wiphy->iface_combinations[i];
 870
 871                 nl_combi = nla_nest_start(msg, i + 1);
 872                 if (!nl_combi)
 873                         goto nla_put_failure;
 874
 875                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 876                 if (!nl_limits)
 877                         goto nla_put_failure;
 878
 879                 for (j = 0; j < c->n_limits; j++) {
 880                         struct nlattr *nl_limit;
 881
 882                         nl_limit = nla_nest_start(msg, j + 1);
 883                         if (!nl_limit)
 884                                 goto nla_put_failure;
 885                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 886                                         c->limits[j].max))
 887                                 goto nla_put_failure;
 888                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 889                                                 c->limits[j].types))
 890                                 goto nla_put_failure;
 891                         nla_nest_end(msg, nl_limit);
 892                 }
 893
 894                 nla_nest_end(msg, nl_limits);
 895
 896                 if (c->beacon_int_infra_match &&
 897                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 898                         goto nla_put_failure;
 899                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 900                                 c->num_different_channels) ||
 901                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 902                                 c->max_interfaces))
 903                         goto nla_put_failure;
 904                 if (large &&
 905                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 906                                 c->radar_detect_widths))
 907                         goto nla_put_failure;
 908
 909                 nla_nest_end(msg, nl_combi);
 910         }
 911
 912         nla_nest_end(msg, nl_combis);
 913
 914         return 0;
 915 nla_put_failure:
 916         return -ENOBUFS;
 917 }
 918
 919 #ifdef CONFIG_PM
 920 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 921                                         struct sk_buff *msg)
 922 {
 923         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 924         struct nlattr *nl_tcp;
 925
 926         if (!tcp)
 927                 return 0;
 928
 929         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 930         if (!nl_tcp)
 931                 return -ENOBUFS;
 932
 933         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 934                         tcp->data_payload_max))
 935                 return -ENOBUFS;
 936
 937         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 938                         tcp->data_payload_max))
 939                 return -ENOBUFS;
 940
 941         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 942                 return -ENOBUFS;
 943
 944         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 945                                 sizeof(*tcp->tok), tcp->tok))
 946                 return -ENOBUFS;
 947
 948         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 949                         tcp->data_interval_max))
 950                 return -ENOBUFS;
 951
 952         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 953                         tcp->wake_payload_max))
 954                 return -ENOBUFS;
 955
 956         nla_nest_end(msg, nl_tcp);
 957         return 0;
 958 }
 959
 960 static int nl80211_send_wowlan(struct sk_buff *msg,
 961                                struct cfg80211_registered_device *dev,
 962                                bool large)
 963 {
 964         struct nlattr *nl_wowlan;
 965
 966         if (!dev->wiphy.wowlan)
 967                 return 0;
 968
 969         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 970         if (!nl_wowlan)
 971                 return -ENOBUFS;
 972
 973         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 974              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 975             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 976              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 977             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 978              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 979             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 980              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 981             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 982              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 983             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 984              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 985             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 986              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 987             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 988              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 989                 return -ENOBUFS;
 990
 991         if (dev->wiphy.wowlan->n_patterns) {
 992                 struct nl80211_pattern_support pat = {
 993                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 994                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 995                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
 996                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
 997                 };
 998
 999                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1000                             sizeof(pat), &pat))
1001                         return -ENOBUFS;
1002         }
1003
1004         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1005                 return -ENOBUFS;
1006
1007         nla_nest_end(msg, nl_wowlan);
1008
1009         return 0;
1010 }
1011 #endif
1012
1013 static int nl80211_send_coalesce(struct sk_buff *msg,
1014                                  struct cfg80211_registered_device *dev)
1015 {
1016         struct nl80211_coalesce_rule_support rule;
1017
1018         if (!dev->wiphy.coalesce)
1019                 return 0;
1020
1021         rule.max_rules = dev->wiphy.coalesce->n_rules;
1022         rule.max_delay = dev->wiphy.coalesce->max_delay;
1023         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1024         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1025         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1026         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1027
1028         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1029                 return -ENOBUFS;
1030
1031         return 0;
1032 }
1033
1034 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1035                                       struct ieee80211_supported_band *sband)
1036 {
1037         struct nlattr *nl_rates, *nl_rate;
1038         struct ieee80211_rate *rate;
1039         int i;
1040
1041         /* add HT info */
1042         if (sband->ht_cap.ht_supported &&
1043             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1044                      sizeof(sband->ht_cap.mcs),
1045                      &sband->ht_cap.mcs) ||
1046              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1047                          sband->ht_cap.cap) ||
1048              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1049                         sband->ht_cap.ampdu_factor) ||
1050              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1051                         sband->ht_cap.ampdu_density)))
1052                 return -ENOBUFS;
1053
1054         /* add VHT info */
1055         if (sband->vht_cap.vht_supported &&
1056             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1057                      sizeof(sband->vht_cap.vht_mcs),
1058                      &sband->vht_cap.vht_mcs) ||
1059              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1060                          sband->vht_cap.cap)))
1061                 return -ENOBUFS;
1062
1063         /* add bitrates */
1064         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1065         if (!nl_rates)
1066                 return -ENOBUFS;
1067
1068         for (i = 0; i < sband->n_bitrates; i++) {
1069                 nl_rate = nla_nest_start(msg, i);
1070                 if (!nl_rate)
1071                         return -ENOBUFS;
1072
1073                 rate = &sband->bitrates[i];
1074                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1075                                 rate->bitrate))
1076                         return -ENOBUFS;
1077                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1078                     nla_put_flag(msg,
1079                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1080                         return -ENOBUFS;
1081
1082                 nla_nest_end(msg, nl_rate);
1083         }
1084
1085         nla_nest_end(msg, nl_rates);
1086
1087         return 0;
1088 }
1089
1090 static int
1091 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1092                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1093 {
1094         u16 stypes;
1095         struct nlattr *nl_ftypes, *nl_ifs;
1096         enum nl80211_iftype ift;
1097         int i;
1098
1099         if (!mgmt_stypes)
1100                 return 0;
1101
1102         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1103         if (!nl_ifs)
1104                 return -ENOBUFS;
1105
1106         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1107                 nl_ftypes = nla_nest_start(msg, ift);
1108                 if (!nl_ftypes)
1109                         return -ENOBUFS;
1110                 i = 0;
1111                 stypes = mgmt_stypes[ift].tx;
1112                 while (stypes) {
1113                         if ((stypes & 1) &&
1114                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1115                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1116                                 return -ENOBUFS;
1117                         stypes >>= 1;
1118                         i++;
1119                 }
1120                 nla_nest_end(msg, nl_ftypes);
1121         }
1122
1123         nla_nest_end(msg, nl_ifs);
1124
1125         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1126         if (!nl_ifs)
1127                 return -ENOBUFS;
1128
1129         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1130                 nl_ftypes = nla_nest_start(msg, ift);
1131                 if (!nl_ftypes)
1132                         return -ENOBUFS;
1133                 i = 0;
1134                 stypes = mgmt_stypes[ift].rx;
1135                 while (stypes) {
1136                         if ((stypes & 1) &&
1137                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1138                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1139                                 return -ENOBUFS;
1140                         stypes >>= 1;
1141                         i++;
1142                 }
1143                 nla_nest_end(msg, nl_ftypes);
1144         }
1145         nla_nest_end(msg, nl_ifs);
1146
1147         return 0;
1148 }
1149
1150 struct nl80211_dump_wiphy_state {
1151         s64 filter_wiphy;
1152         long start;
1153         long split_start, band_start, chan_start;
1154         bool split;
1155 };
1156
1157 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1158                               struct sk_buff *msg, u32 portid, u32 seq,
1159                               int flags, struct nl80211_dump_wiphy_state *state)
1160 {
1161         void *hdr;
1162         struct nlattr *nl_bands, *nl_band;
1163         struct nlattr *nl_freqs, *nl_freq;
1164         struct nlattr *nl_cmds;
1165         enum ieee80211_band band;
1166         struct ieee80211_channel *chan;
1167         int i;
1168         const struct ieee80211_txrx_stypes *mgmt_stypes =
1169                                 dev->wiphy.mgmt_stypes;
1170         u32 features;
1171
1172         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1173         if (!hdr)
1174                 return -ENOBUFS;
1175
1176         if (WARN_ON(!state))
1177                 return -EINVAL;
1178
1179         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1180             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1181                            wiphy_name(&dev->wiphy)) ||
1182             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1183                         cfg80211_rdev_list_generation))
1184                 goto nla_put_failure;
1185
1186         switch (state->split_start) {
1187         case 0:
1188                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1189                                dev->wiphy.retry_short) ||
1190                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1191                                dev->wiphy.retry_long) ||
1192                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1193                                 dev->wiphy.frag_threshold) ||
1194                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1195                                 dev->wiphy.rts_threshold) ||
1196                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1197                                dev->wiphy.coverage_class) ||
1198                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1199                                dev->wiphy.max_scan_ssids) ||
1200                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1201                                dev->wiphy.max_sched_scan_ssids) ||
1202                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1203                                 dev->wiphy.max_scan_ie_len) ||
1204                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1205                                 dev->wiphy.max_sched_scan_ie_len) ||
1206                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1207                                dev->wiphy.max_match_sets))
1208                         goto nla_put_failure;
1209
1210                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1211                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1212                         goto nla_put_failure;
1213                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1214                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1215                         goto nla_put_failure;
1216                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1217                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1218                         goto nla_put_failure;
1219                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1220                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1221                         goto nla_put_failure;
1222                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1223                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1224                         goto nla_put_failure;
1225                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1226                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1227                         goto nla_put_failure;
1228                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1229                     nla_put_flag(msg, WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1230                         goto nla_put_failure;
1231
1232                 state->split_start++;
1233                 if (state->split)
1234                         break;
1235         case 1:
1236                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1237                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1238                             dev->wiphy.cipher_suites))
1239                         goto nla_put_failure;
1240
1241                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1242                                dev->wiphy.max_num_pmkids))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1246                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1247                         goto nla_put_failure;
1248
1249                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1250                                 dev->wiphy.available_antennas_tx) ||
1251                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1252                                 dev->wiphy.available_antennas_rx))
1253                         goto nla_put_failure;
1254
1255                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1256                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1257                                 dev->wiphy.probe_resp_offload))
1258                         goto nla_put_failure;
1259
1260                 if ((dev->wiphy.available_antennas_tx ||
1261                      dev->wiphy.available_antennas_rx) &&
1262                     dev->ops->get_antenna) {
1263                         u32 tx_ant = 0, rx_ant = 0;
1264                         int res;
1265                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1266                         if (!res) {
1267                                 if (nla_put_u32(msg,
1268                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1269                                                 tx_ant) ||
1270                                     nla_put_u32(msg,
1271                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1272                                                 rx_ant))
1273                                         goto nla_put_failure;
1274                         }
1275                 }
1276
1277                 state->split_start++;
1278                 if (state->split)
1279                         break;
1280         case 2:
1281                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1282                                         dev->wiphy.interface_modes))
1283                                 goto nla_put_failure;
1284                 state->split_start++;
1285                 if (state->split)
1286                         break;
1287         case 3:
1288                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1289                 if (!nl_bands)
1290                         goto nla_put_failure;
1291
1292                 for (band = state->band_start;
1293                      band < IEEE80211_NUM_BANDS; band++) {
1294                         struct ieee80211_supported_band *sband;
1295
1296                         sband = dev->wiphy.bands[band];
1297
1298                         if (!sband)
1299                                 continue;
1300
1301                         nl_band = nla_nest_start(msg, band);
1302                         if (!nl_band)
1303                                 goto nla_put_failure;
1304
1305                         switch (state->chan_start) {
1306                         case 0:
1307                                 if (nl80211_send_band_rateinfo(msg, sband))
1308                                         goto nla_put_failure;
1309                                 state->chan_start++;
1310                                 if (state->split)
1311                                         break;
1312                         default:
1313                                 /* add frequencies */
1314                                 nl_freqs = nla_nest_start(
1315                                         msg, NL80211_BAND_ATTR_FREQS);
1316                                 if (!nl_freqs)
1317                                         goto nla_put_failure;
1318
1319                                 for (i = state->chan_start - 1;
1320                                      i < sband->n_channels;
1321                                      i++) {
1322                                         nl_freq = nla_nest_start(msg, i);
1323                                         if (!nl_freq)
1324                                                 goto nla_put_failure;
1325
1326                                         chan = &sband->channels[i];
1327
1328                                         if (nl80211_msg_put_channel(
1329                                                         msg, chan,
1330                                                         state->split))
1331                                                 goto nla_put_failure;
1332
1333                                         nla_nest_end(msg, nl_freq);
1334                                         if (state->split)
1335                                                 break;
1336                                 }
1337                                 if (i < sband->n_channels)
1338                                         state->chan_start = i + 2;
1339                                 else
1340                                         state->chan_start = 0;
1341                                 nla_nest_end(msg, nl_freqs);
1342                         }
1343
1344                         nla_nest_end(msg, nl_band);
1345
1346                         if (state->split) {
1347                                 /* start again here */
1348                                 if (state->chan_start)
1349                                         band--;
1350                                 break;
1351                         }
1352                 }
1353                 nla_nest_end(msg, nl_bands);
1354
1355                 if (band < IEEE80211_NUM_BANDS)
1356                         state->band_start = band + 1;
1357                 else
1358                         state->band_start = 0;
1359
1360                 /* if bands & channels are done, continue outside */
1361                 if (state->band_start == 0 && state->chan_start == 0)
1362                         state->split_start++;
1363                 if (state->split)
1364                         break;
1365         case 4:
1366                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1367                 if (!nl_cmds)
1368                         goto nla_put_failure;
1369
1370                 i = 0;
1371 #define CMD(op, n)                                                      \
1372                  do {                                                   \
1373                         if (dev->ops->op) {                             \
1374                                 i++;                                    \
1375                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1376                                         goto nla_put_failure;           \
1377                         }                                               \
1378                 } while (0)
1379
1380                 CMD(add_virtual_intf, NEW_INTERFACE);
1381                 CMD(change_virtual_intf, SET_INTERFACE);
1382                 CMD(add_key, NEW_KEY);
1383                 CMD(start_ap, START_AP);
1384                 CMD(add_station, NEW_STATION);
1385                 CMD(add_mpath, NEW_MPATH);
1386                 CMD(update_mesh_config, SET_MESH_CONFIG);
1387                 CMD(change_bss, SET_BSS);
1388                 CMD(auth, AUTHENTICATE);
1389                 CMD(assoc, ASSOCIATE);
1390                 CMD(deauth, DEAUTHENTICATE);
1391                 CMD(disassoc, DISASSOCIATE);
1392                 CMD(join_ibss, JOIN_IBSS);
1393                 CMD(join_mesh, JOIN_MESH);
1394                 CMD(set_pmksa, SET_PMKSA);
1395                 CMD(del_pmksa, DEL_PMKSA);
1396                 CMD(flush_pmksa, FLUSH_PMKSA);
1397                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1398                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1399                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1400                 CMD(mgmt_tx, FRAME);
1401                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1402                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1403                         i++;
1404                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1405                                 goto nla_put_failure;
1406                 }
1407                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1408                     dev->ops->join_mesh) {
1409                         i++;
1410                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1411                                 goto nla_put_failure;
1412                 }
1413                 CMD(set_wds_peer, SET_WDS_PEER);
1414                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1415                         CMD(tdls_mgmt, TDLS_MGMT);
1416                         CMD(tdls_oper, TDLS_OPER);
1417                 }
1418                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1419                         CMD(sched_scan_start, START_SCHED_SCAN);
1420                 CMD(probe_client, PROBE_CLIENT);
1421                 CMD(set_noack_map, SET_NOACK_MAP);
1422                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1423                         i++;
1424                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1425                                 goto nla_put_failure;
1426                 }
1427                 CMD(start_p2p_device, START_P2P_DEVICE);
1428                 CMD(set_mcast_rate, SET_MCAST_RATE);
1429                 if (state->split) {
1430                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1431                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1432                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1433                                 CMD(channel_switch, CHANNEL_SWITCH);
1434                 }
1435
1436 #ifdef CONFIG_NL80211_TESTMODE
1437                 CMD(testmode_cmd, TESTMODE);
1438 #endif
1439
1440 #undef CMD
1441
1442                 if (dev->ops->connect || dev->ops->auth) {
1443                         i++;
1444                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1445                                 goto nla_put_failure;
1446                 }
1447
1448                 if (dev->ops->disconnect || dev->ops->deauth) {
1449                         i++;
1450                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1451                                 goto nla_put_failure;
1452                 }
1453
1454                 nla_nest_end(msg, nl_cmds);
1455                 state->split_start++;
1456                 if (state->split)
1457                         break;
1458         case 5:
1459                 if (dev->ops->remain_on_channel &&
1460                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1461                     nla_put_u32(msg,
1462                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1463                                 dev->wiphy.max_remain_on_channel_duration))
1464                         goto nla_put_failure;
1465
1466                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1467                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1468                         goto nla_put_failure;
1469
1470                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1471                         goto nla_put_failure;
1472                 state->split_start++;
1473                 if (state->split)
1474                         break;
1475         case 6:
1476 #ifdef CONFIG_PM
1477                 if (nl80211_send_wowlan(msg, dev, state->split))
1478                         goto nla_put_failure;
1479                 state->split_start++;
1480                 if (state->split)
1481                         break;
1482 #else
1483                 state->split_start++;
1484 #endif
1485         case 7:
1486                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1487                                         dev->wiphy.software_iftypes))
1488                         goto nla_put_failure;
1489
1490                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1491                                                    state->split))
1492                         goto nla_put_failure;
1493
1494                 state->split_start++;
1495                 if (state->split)
1496                         break;
1497         case 8:
1498                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1499                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1500                                 dev->wiphy.ap_sme_capa))
1501                         goto nla_put_failure;
1502
1503                 features = dev->wiphy.features;
1504                 /*
1505                  * We can only add the per-channel limit information if the
1506                  * dump is split, otherwise it makes it too big. Therefore
1507                  * only advertise it in that case.
1508                  */
1509                 if (state->split)
1510                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1511                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1512                         goto nla_put_failure;
1513
1514                 if (dev->wiphy.ht_capa_mod_mask &&
1515                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1516                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1517                             dev->wiphy.ht_capa_mod_mask))
1518                         goto nla_put_failure;
1519
1520                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1521                     dev->wiphy.max_acl_mac_addrs &&
1522                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1523                                 dev->wiphy.max_acl_mac_addrs))
1524                         goto nla_put_failure;
1525
1526                 /*
1527                  * Any information below this point is only available to
1528                  * applications that can deal with it being split. This
1529                  * helps ensure that newly added capabilities don't break
1530                  * older tools by overrunning their buffers.
1531                  *
1532                  * We still increment split_start so that in the split
1533                  * case we'll continue with more data in the next round,
1534                  * but break unconditionally so unsplit data stops here.
1535                  */
1536                 state->split_start++;
1537                 break;
1538         case 9:
1539                 if (dev->wiphy.extended_capabilities &&
1540                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1541                              dev->wiphy.extended_capabilities_len,
1542                              dev->wiphy.extended_capabilities) ||
1543                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1544                              dev->wiphy.extended_capabilities_len,
1545                              dev->wiphy.extended_capabilities_mask)))
1546                         goto nla_put_failure;
1547
1548                 if (dev->wiphy.vht_capa_mod_mask &&
1549                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1550                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1551                             dev->wiphy.vht_capa_mod_mask))
1552                         goto nla_put_failure;
1553
1554                 state->split_start++;
1555                 break;
1556         case 10:
1557                 if (nl80211_send_coalesce(msg, dev))
1558                         goto nla_put_failure;
1559
1560                 /* done */
1561                 state->split_start = 0;
1562                 break;
1563         }
1564         return genlmsg_end(msg, hdr);
1565
1566  nla_put_failure:
1567         genlmsg_cancel(msg, hdr);
1568         return -EMSGSIZE;
1569 }
1570
1571 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1572                                     struct netlink_callback *cb,
1573                                     struct nl80211_dump_wiphy_state *state)
1574 {
1575         struct nlattr **tb = nl80211_fam.attrbuf;
1576         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1577                               tb, nl80211_fam.maxattr, nl80211_policy);
1578         /* ignore parse errors for backward compatibility */
1579         if (ret)
1580                 return 0;
1581
1582         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1583         if (tb[NL80211_ATTR_WIPHY])
1584                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1585         if (tb[NL80211_ATTR_WDEV])
1586                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1587         if (tb[NL80211_ATTR_IFINDEX]) {
1588                 struct net_device *netdev;
1589                 struct cfg80211_registered_device *rdev;
1590                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1591
1592                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1593                 if (!netdev)
1594                         return -ENODEV;
1595                 if (netdev->ieee80211_ptr) {
1596                         rdev = wiphy_to_dev(
1597                                 netdev->ieee80211_ptr->wiphy);
1598                         state->filter_wiphy = rdev->wiphy_idx;
1599                 }
1600                 dev_put(netdev);
1601         }
1602
1603         return 0;
1604 }
1605
1606 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1607 {
1608         int idx = 0, ret;
1609         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1610         struct cfg80211_registered_device *dev;
1611
1612         rtnl_lock();
1613         if (!state) {
1614                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1615                 if (!state) {
1616                         rtnl_unlock();
1617                         return -ENOMEM;
1618                 }
1619                 state->filter_wiphy = -1;
1620                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1621                 if (ret) {
1622                         kfree(state);
1623                         rtnl_unlock();
1624                         return ret;
1625                 }
1626                 cb->args[0] = (long)state;
1627         }
1628
1629         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1630                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1631                         continue;
1632                 if (++idx <= state->start)
1633                         continue;
1634                 if (state->filter_wiphy != -1 &&
1635                     state->filter_wiphy != dev->wiphy_idx)
1636                         continue;
1637                 /* attempt to fit multiple wiphy data chunks into the skb */
1638                 do {
1639                         ret = nl80211_send_wiphy(dev, skb,
1640                                                  NETLINK_CB(cb->skb).portid,
1641                                                  cb->nlh->nlmsg_seq,
1642                                                  NLM_F_MULTI, state);
1643                         if (ret < 0) {
1644                                 /*
1645                                  * If sending the wiphy data didn't fit (ENOBUFS
1646                                  * or EMSGSIZE returned), this SKB is still
1647                                  * empty (so it's not too big because another
1648                                  * wiphy dataset is already in the skb) and
1649                                  * we've not tried to adjust the dump allocation
1650                                  * yet ... then adjust the alloc size to be
1651                                  * bigger, and return 1 but with the empty skb.
1652                                  * This results in an empty message being RX'ed
1653                                  * in userspace, but that is ignored.
1654                                  *
1655                                  * We can then retry with the larger buffer.
1656                                  */
1657                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1658                                     !skb->len &&
1659                                     cb->min_dump_alloc < 4096) {
1660                                         cb->min_dump_alloc = 4096;
1661                                         rtnl_unlock();
1662                                         return 1;
1663                                 }
1664                                 idx--;
1665                                 break;
1666                         }
1667                 } while (state->split_start > 0);
1668                 break;
1669         }
1670         rtnl_unlock();
1671
1672         state->start = idx;
1673
1674         return skb->len;
1675 }
1676
1677 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1678 {
1679         kfree((void *)cb->args[0]);
1680         return 0;
1681 }
1682
1683 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1684 {
1685         struct sk_buff *msg;
1686         struct cfg80211_registered_device *dev = info->user_ptr[0];
1687         struct nl80211_dump_wiphy_state state = {};
1688
1689         msg = nlmsg_new(4096, GFP_KERNEL);
1690         if (!msg)
1691                 return -ENOMEM;
1692
1693         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1694                                &state) < 0) {
1695                 nlmsg_free(msg);
1696                 return -ENOBUFS;
1697         }
1698
1699         return genlmsg_reply(msg, info);
1700 }
1701
1702 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1703         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1704         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1705         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1706         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1707         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1708 };
1709
1710 static int parse_txq_params(struct nlattr *tb[],
1711                             struct ieee80211_txq_params *txq_params)
1712 {
1713         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1714             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1715             !tb[NL80211_TXQ_ATTR_AIFS])
1716                 return -EINVAL;
1717
1718         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1719         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1720         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1721         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1722         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1723
1724         if (txq_params->ac >= NL80211_NUM_ACS)
1725                 return -EINVAL;
1726
1727         return 0;
1728 }
1729
1730 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1731 {
1732         /*
1733          * You can only set the channel explicitly for WDS interfaces,
1734          * all others have their channel managed via their respective
1735          * "establish a connection" command (connect, join, ...)
1736          *
1737          * For AP/GO and mesh mode, the channel can be set with the
1738          * channel userspace API, but is only stored and passed to the
1739          * low-level driver when the AP starts or the mesh is joined.
1740          * This is for backward compatibility, userspace can also give
1741          * the channel in the start-ap or join-mesh commands instead.
1742          *
1743          * Monitors are special as they are normally slaved to
1744          * whatever else is going on, so they have their own special
1745          * operation to set the monitor channel if possible.
1746          */
1747         return !wdev ||
1748                 wdev->iftype == NL80211_IFTYPE_AP ||
1749                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1750                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1751                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1752 }
1753
1754 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1755                                  struct genl_info *info,
1756                                  struct cfg80211_chan_def *chandef)
1757 {
1758         u32 control_freq;
1759
1760         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1761                 return -EINVAL;
1762
1763         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1764
1765         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1766         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1767         chandef->center_freq1 = control_freq;
1768         chandef->center_freq2 = 0;
1769
1770         /* Primary channel not allowed */
1771         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1772                 return -EINVAL;
1773
1774         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1775                 enum nl80211_channel_type chantype;
1776
1777                 chantype = nla_get_u32(
1778                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1779
1780                 switch (chantype) {
1781                 case NL80211_CHAN_NO_HT:
1782                 case NL80211_CHAN_HT20:
1783                 case NL80211_CHAN_HT40PLUS:
1784                 case NL80211_CHAN_HT40MINUS:
1785                         cfg80211_chandef_create(chandef, chandef->chan,
1786                                                 chantype);
1787                         break;
1788                 default:
1789                         return -EINVAL;
1790                 }
1791         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1792                 chandef->width =
1793                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1794                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1795                         chandef->center_freq1 =
1796                                 nla_get_u32(
1797                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1798                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1799                         chandef->center_freq2 =
1800                                 nla_get_u32(
1801                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1802         }
1803
1804         if (!cfg80211_chandef_valid(chandef))
1805                 return -EINVAL;
1806
1807         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1808                                      IEEE80211_CHAN_DISABLED))
1809                 return -EINVAL;
1810
1811         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1812              chandef->width == NL80211_CHAN_WIDTH_10) &&
1813             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1814                 return -EINVAL;
1815
1816         return 0;
1817 }
1818
1819 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1820                                  struct wireless_dev *wdev,
1821                                  struct genl_info *info)
1822 {
1823         struct cfg80211_chan_def chandef;
1824         int result;
1825         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1826
1827         if (wdev)
1828                 iftype = wdev->iftype;
1829
1830         if (!nl80211_can_set_dev_channel(wdev))
1831                 return -EOPNOTSUPP;
1832
1833         result = nl80211_parse_chandef(rdev, info, &chandef);
1834         if (result)
1835                 return result;
1836
1837         switch (iftype) {
1838         case NL80211_IFTYPE_AP:
1839         case NL80211_IFTYPE_P2P_GO:
1840                 if (wdev->beacon_interval) {
1841                         result = -EBUSY;
1842                         break;
1843                 }
1844                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1845                         result = -EINVAL;
1846                         break;
1847                 }
1848                 wdev->preset_chandef = chandef;
1849                 result = 0;
1850                 break;
1851         case NL80211_IFTYPE_MESH_POINT:
1852                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1853                 break;
1854         case NL80211_IFTYPE_MONITOR:
1855                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1856                 break;
1857         default:
1858                 result = -EINVAL;
1859         }
1860
1861         return result;
1862 }
1863
1864 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1865 {
1866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1867         struct net_device *netdev = info->user_ptr[1];
1868
1869         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1870 }
1871
1872 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1873 {
1874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1875         struct net_device *dev = info->user_ptr[1];
1876         struct wireless_dev *wdev = dev->ieee80211_ptr;
1877         const u8 *bssid;
1878
1879         if (!info->attrs[NL80211_ATTR_MAC])
1880                 return -EINVAL;
1881
1882         if (netif_running(dev))
1883                 return -EBUSY;
1884
1885         if (!rdev->ops->set_wds_peer)
1886                 return -EOPNOTSUPP;
1887
1888         if (wdev->iftype != NL80211_IFTYPE_WDS)
1889                 return -EOPNOTSUPP;
1890
1891         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1892         return rdev_set_wds_peer(rdev, dev, bssid);
1893 }
1894
1895
1896 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1897 {
1898         struct cfg80211_registered_device *rdev;
1899         struct net_device *netdev = NULL;
1900         struct wireless_dev *wdev;
1901         int result = 0, rem_txq_params = 0;
1902         struct nlattr *nl_txq_params;
1903         u32 changed;
1904         u8 retry_short = 0, retry_long = 0;
1905         u32 frag_threshold = 0, rts_threshold = 0;
1906         u8 coverage_class = 0;
1907
1908         ASSERT_RTNL();
1909
1910         /*
1911          * Try to find the wiphy and netdev. Normally this
1912          * function shouldn't need the netdev, but this is
1913          * done for backward compatibility -- previously
1914          * setting the channel was done per wiphy, but now
1915          * it is per netdev. Previous userland like hostapd
1916          * also passed a netdev to set_wiphy, so that it is
1917          * possible to let that go to the right netdev!
1918          */
1919
1920         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1921                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1922
1923                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1924                 if (netdev && netdev->ieee80211_ptr)
1925                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1926                 else
1927                         netdev = NULL;
1928         }
1929
1930         if (!netdev) {
1931                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1932                                                   info->attrs);
1933                 if (IS_ERR(rdev))
1934                         return PTR_ERR(rdev);
1935                 wdev = NULL;
1936                 netdev = NULL;
1937                 result = 0;
1938         } else
1939                 wdev = netdev->ieee80211_ptr;
1940
1941         /*
1942          * end workaround code, by now the rdev is available
1943          * and locked, and wdev may or may not be NULL.
1944          */
1945
1946         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1947                 result = cfg80211_dev_rename(
1948                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1949
1950         if (result)
1951                 goto bad_res;
1952
1953         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1954                 struct ieee80211_txq_params txq_params;
1955                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1956
1957                 if (!rdev->ops->set_txq_params) {
1958                         result = -EOPNOTSUPP;
1959                         goto bad_res;
1960                 }
1961
1962                 if (!netdev) {
1963                         result = -EINVAL;
1964                         goto bad_res;
1965                 }
1966
1967                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1968                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1969                         result = -EINVAL;
1970                         goto bad_res;
1971                 }
1972
1973                 if (!netif_running(netdev)) {
1974                         result = -ENETDOWN;
1975                         goto bad_res;
1976                 }
1977
1978                 nla_for_each_nested(nl_txq_params,
1979                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1980                                     rem_txq_params) {
1981                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1982                                   nla_data(nl_txq_params),
1983                                   nla_len(nl_txq_params),
1984                                   txq_params_policy);
1985                         result = parse_txq_params(tb, &txq_params);
1986                         if (result)
1987                                 goto bad_res;
1988
1989                         result = rdev_set_txq_params(rdev, netdev,
1990                                                      &txq_params);
1991                         if (result)
1992                                 goto bad_res;
1993                 }
1994         }
1995
1996         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1997                 result = __nl80211_set_channel(rdev,
1998                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1999                                 info);
2000                 if (result)
2001                         goto bad_res;
2002         }
2003
2004         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2005                 struct wireless_dev *txp_wdev = wdev;
2006                 enum nl80211_tx_power_setting type;
2007                 int idx, mbm = 0;
2008
2009                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2010                         txp_wdev = NULL;
2011
2012                 if (!rdev->ops->set_tx_power) {
2013                         result = -EOPNOTSUPP;
2014                         goto bad_res;
2015                 }
2016
2017                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2018                 type = nla_get_u32(info->attrs[idx]);
2019
2020                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2021                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2022                         result = -EINVAL;
2023                         goto bad_res;
2024                 }
2025
2026                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2027                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2028                         mbm = nla_get_u32(info->attrs[idx]);
2029                 }
2030
2031                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2032                 if (result)
2033                         goto bad_res;
2034         }
2035
2036         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2037             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2038                 u32 tx_ant, rx_ant;
2039                 if ((!rdev->wiphy.available_antennas_tx &&
2040                      !rdev->wiphy.available_antennas_rx) ||
2041                     !rdev->ops->set_antenna) {
2042                         result = -EOPNOTSUPP;
2043                         goto bad_res;
2044                 }
2045
2046                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2047                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2048
2049                 /* reject antenna configurations which don't match the
2050                  * available antenna masks, except for the "all" mask */
2051                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2052                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2053                         result = -EINVAL;
2054                         goto bad_res;
2055                 }
2056
2057                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2058                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2059
2060                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2061                 if (result)
2062                         goto bad_res;
2063         }
2064
2065         changed = 0;
2066
2067         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2068                 retry_short = nla_get_u8(
2069                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2070                 if (retry_short == 0) {
2071                         result = -EINVAL;
2072                         goto bad_res;
2073                 }
2074                 changed |= WIPHY_PARAM_RETRY_SHORT;
2075         }
2076
2077         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2078                 retry_long = nla_get_u8(
2079                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2080                 if (retry_long == 0) {
2081                         result = -EINVAL;
2082                         goto bad_res;
2083                 }
2084                 changed |= WIPHY_PARAM_RETRY_LONG;
2085         }
2086
2087         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2088                 frag_threshold = nla_get_u32(
2089                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2090                 if (frag_threshold < 256) {
2091                         result = -EINVAL;
2092                         goto bad_res;
2093                 }
2094                 if (frag_threshold != (u32) -1) {
2095                         /*
2096                          * Fragments (apart from the last one) are required to
2097                          * have even length. Make the fragmentation code
2098                          * simpler by stripping LSB should someone try to use
2099                          * odd threshold value.
2100                          */
2101                         frag_threshold &= ~0x1;
2102                 }
2103                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2104         }
2105
2106         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2107                 rts_threshold = nla_get_u32(
2108                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2109                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2110         }
2111
2112         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2113                 coverage_class = nla_get_u8(
2114                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2115                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2116         }
2117
2118         if (changed) {
2119                 u8 old_retry_short, old_retry_long;
2120                 u32 old_frag_threshold, old_rts_threshold;
2121                 u8 old_coverage_class;
2122
2123                 if (!rdev->ops->set_wiphy_params) {
2124                         result = -EOPNOTSUPP;
2125                         goto bad_res;
2126                 }
2127
2128                 old_retry_short = rdev->wiphy.retry_short;
2129                 old_retry_long = rdev->wiphy.retry_long;
2130                 old_frag_threshold = rdev->wiphy.frag_threshold;
2131                 old_rts_threshold = rdev->wiphy.rts_threshold;
2132                 old_coverage_class = rdev->wiphy.coverage_class;
2133
2134                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2135                         rdev->wiphy.retry_short = retry_short;
2136                 if (changed & WIPHY_PARAM_RETRY_LONG)
2137                         rdev->wiphy.retry_long = retry_long;
2138                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2139                         rdev->wiphy.frag_threshold = frag_threshold;
2140                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2141                         rdev->wiphy.rts_threshold = rts_threshold;
2142                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2143                         rdev->wiphy.coverage_class = coverage_class;
2144
2145                 result = rdev_set_wiphy_params(rdev, changed);
2146                 if (result) {
2147                         rdev->wiphy.retry_short = old_retry_short;
2148                         rdev->wiphy.retry_long = old_retry_long;
2149                         rdev->wiphy.frag_threshold = old_frag_threshold;
2150                         rdev->wiphy.rts_threshold = old_rts_threshold;
2151                         rdev->wiphy.coverage_class = old_coverage_class;
2152                 }
2153         }
2154
2155  bad_res:
2156         if (netdev)
2157                 dev_put(netdev);
2158         return result;
2159 }
2160
2161 static inline u64 wdev_id(struct wireless_dev *wdev)
2162 {
2163         return (u64)wdev->identifier |
2164                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2165 }
2166
2167 static int nl80211_send_chandef(struct sk_buff *msg,
2168                                  struct cfg80211_chan_def *chandef)
2169 {
2170         WARN_ON(!cfg80211_chandef_valid(chandef));
2171
2172         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2173                         chandef->chan->center_freq))
2174                 return -ENOBUFS;
2175         switch (chandef->width) {
2176         case NL80211_CHAN_WIDTH_20_NOHT:
2177         case NL80211_CHAN_WIDTH_20:
2178         case NL80211_CHAN_WIDTH_40:
2179                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2180                                 cfg80211_get_chandef_type(chandef)))
2181                         return -ENOBUFS;
2182                 break;
2183         default:
2184                 break;
2185         }
2186         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2187                 return -ENOBUFS;
2188         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2189                 return -ENOBUFS;
2190         if (chandef->center_freq2 &&
2191             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2192                 return -ENOBUFS;
2193         return 0;
2194 }
2195
2196 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2197                               struct cfg80211_registered_device *rdev,
2198                               struct wireless_dev *wdev)
2199 {
2200         struct net_device *dev = wdev->netdev;
2201         void *hdr;
2202
2203         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2204         if (!hdr)
2205                 return -1;
2206
2207         if (dev &&
2208             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2209              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2210                 goto nla_put_failure;
2211
2212         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2213             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2214             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2216             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2217                         rdev->devlist_generation ^
2218                         (cfg80211_rdev_list_generation << 2)))
2219                 goto nla_put_failure;
2220
2221         if (rdev->ops->get_channel) {
2222                 int ret;
2223                 struct cfg80211_chan_def chandef;
2224
2225                 ret = rdev_get_channel(rdev, wdev, &chandef);
2226                 if (ret == 0) {
2227                         if (nl80211_send_chandef(msg, &chandef))
2228                                 goto nla_put_failure;
2229                 }
2230         }
2231
2232         if (wdev->ssid_len) {
2233                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2234                         goto nla_put_failure;
2235         }
2236
2237         return genlmsg_end(msg, hdr);
2238
2239  nla_put_failure:
2240         genlmsg_cancel(msg, hdr);
2241         return -EMSGSIZE;
2242 }
2243
2244 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2245 {
2246         int wp_idx = 0;
2247         int if_idx = 0;
2248         int wp_start = cb->args[0];
2249         int if_start = cb->args[1];
2250         struct cfg80211_registered_device *rdev;
2251         struct wireless_dev *wdev;
2252
2253         rtnl_lock();
2254         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2255                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2256                         continue;
2257                 if (wp_idx < wp_start) {
2258                         wp_idx++;
2259                         continue;
2260                 }
2261                 if_idx = 0;
2262
2263                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2264                         if (if_idx < if_start) {
2265                                 if_idx++;
2266                                 continue;
2267                         }
2268                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2269                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2270                                                rdev, wdev) < 0) {
2271                                 goto out;
2272                         }
2273                         if_idx++;
2274                 }
2275
2276                 wp_idx++;
2277         }
2278  out:
2279         rtnl_unlock();
2280
2281         cb->args[0] = wp_idx;
2282         cb->args[1] = if_idx;
2283
2284         return skb->len;
2285 }
2286
2287 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2288 {
2289         struct sk_buff *msg;
2290         struct cfg80211_registered_device *dev = info->user_ptr[0];
2291         struct wireless_dev *wdev = info->user_ptr[1];
2292
2293         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2294         if (!msg)
2295                 return -ENOMEM;
2296
2297         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2298                                dev, wdev) < 0) {
2299                 nlmsg_free(msg);
2300                 return -ENOBUFS;
2301         }
2302
2303         return genlmsg_reply(msg, info);
2304 }
2305
2306 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2307         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2308         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2309         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2310         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2311         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2312         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2313 };
2314
2315 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2316 {
2317         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2318         int flag;
2319
2320         *mntrflags = 0;
2321
2322         if (!nla)
2323                 return -EINVAL;
2324
2325         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2326                              nla, mntr_flags_policy))
2327                 return -EINVAL;
2328
2329         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2330                 if (flags[flag])
2331                         *mntrflags |= (1<<flag);
2332
2333         return 0;
2334 }
2335
2336 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2337                                struct net_device *netdev, u8 use_4addr,
2338                                enum nl80211_iftype iftype)
2339 {
2340         if (!use_4addr) {
2341                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2342                         return -EBUSY;
2343                 return 0;
2344         }
2345
2346         switch (iftype) {
2347         case NL80211_IFTYPE_AP_VLAN:
2348                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2349                         return 0;
2350                 break;
2351         case NL80211_IFTYPE_STATION:
2352                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2353                         return 0;
2354                 break;
2355         default:
2356                 break;
2357         }
2358
2359         return -EOPNOTSUPP;
2360 }
2361
2362 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2363 {
2364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2365         struct vif_params params;
2366         int err;
2367         enum nl80211_iftype otype, ntype;
2368         struct net_device *dev = info->user_ptr[1];
2369         u32 _flags, *flags = NULL;
2370         bool change = false;
2371
2372         memset(&params, 0, sizeof(params));
2373
2374         otype = ntype = dev->ieee80211_ptr->iftype;
2375
2376         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2377                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2378                 if (otype != ntype)
2379                         change = true;
2380                 if (ntype > NL80211_IFTYPE_MAX)
2381                         return -EINVAL;
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2385                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2386
2387                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2388                         return -EINVAL;
2389                 if (netif_running(dev))
2390                         return -EBUSY;
2391
2392                 wdev_lock(wdev);
2393                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2394                              IEEE80211_MAX_MESH_ID_LEN);
2395                 wdev->mesh_id_up_len =
2396                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2397                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2398                        wdev->mesh_id_up_len);
2399                 wdev_unlock(wdev);
2400         }
2401
2402         if (info->attrs[NL80211_ATTR_4ADDR]) {
2403                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2404                 change = true;
2405                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2406                 if (err)
2407                         return err;
2408         } else {
2409                 params.use_4addr = -1;
2410         }
2411
2412         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2413                 if (ntype != NL80211_IFTYPE_MONITOR)
2414                         return -EINVAL;
2415                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2416                                           &_flags);
2417                 if (err)
2418                         return err;
2419
2420                 flags = &_flags;
2421                 change = true;
2422         }
2423
2424         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2425             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2426                 return -EOPNOTSUPP;
2427
2428         if (change)
2429                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2430         else
2431                 err = 0;
2432
2433         if (!err && params.use_4addr != -1)
2434                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2435
2436         return err;
2437 }
2438
2439 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2440 {
2441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2442         struct vif_params params;
2443         struct wireless_dev *wdev;
2444         struct sk_buff *msg;
2445         int err;
2446         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2447         u32 flags;
2448
2449         memset(&params, 0, sizeof(params));
2450
2451         if (!info->attrs[NL80211_ATTR_IFNAME])
2452                 return -EINVAL;
2453
2454         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2455                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2456                 if (type > NL80211_IFTYPE_MAX)
2457                         return -EINVAL;
2458         }
2459
2460         if (!rdev->ops->add_virtual_intf ||
2461             !(rdev->wiphy.interface_modes & (1 << type)))
2462                 return -EOPNOTSUPP;
2463
2464         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2465                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2466                            ETH_ALEN);
2467                 if (!is_valid_ether_addr(params.macaddr))
2468                         return -EADDRNOTAVAIL;
2469         }
2470
2471         if (info->attrs[NL80211_ATTR_4ADDR]) {
2472                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2473                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2474                 if (err)
2475                         return err;
2476         }
2477
2478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2479         if (!msg)
2480                 return -ENOMEM;
2481
2482         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2483                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2484                                   &flags);
2485
2486         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2487             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2488                 return -EOPNOTSUPP;
2489
2490         wdev = rdev_add_virtual_intf(rdev,
2491                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2492                                 type, err ? NULL : &flags, &params);
2493         if (IS_ERR(wdev)) {
2494                 nlmsg_free(msg);
2495                 return PTR_ERR(wdev);
2496         }
2497
2498         switch (type) {
2499         case NL80211_IFTYPE_MESH_POINT:
2500                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2501                         break;
2502                 wdev_lock(wdev);
2503                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2504                              IEEE80211_MAX_MESH_ID_LEN);
2505                 wdev->mesh_id_up_len =
2506                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2507                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2508                        wdev->mesh_id_up_len);
2509                 wdev_unlock(wdev);
2510                 break;
2511         case NL80211_IFTYPE_P2P_DEVICE:
2512                 /*
2513                  * P2P Device doesn't have a netdev, so doesn't go
2514                  * through the netdev notifier and must be added here
2515                  */
2516                 mutex_init(&wdev->mtx);
2517                 INIT_LIST_HEAD(&wdev->event_list);
2518                 spin_lock_init(&wdev->event_lock);
2519                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2520                 spin_lock_init(&wdev->mgmt_registrations_lock);
2521
2522                 wdev->identifier = ++rdev->wdev_id;
2523                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2524                 rdev->devlist_generation++;
2525                 break;
2526         default:
2527                 break;
2528         }
2529
2530         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2531                                rdev, wdev) < 0) {
2532                 nlmsg_free(msg);
2533                 return -ENOBUFS;
2534         }
2535
2536         return genlmsg_reply(msg, info);
2537 }
2538
2539 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2540 {
2541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2542         struct wireless_dev *wdev = info->user_ptr[1];
2543
2544         if (!rdev->ops->del_virtual_intf)
2545                 return -EOPNOTSUPP;
2546
2547         /*
2548          * If we remove a wireless device without a netdev then clear
2549          * user_ptr[1] so that nl80211_post_doit won't dereference it
2550          * to check if it needs to do dev_put(). Otherwise it crashes
2551          * since the wdev has been freed, unlike with a netdev where
2552          * we need the dev_put() for the netdev to really be freed.
2553          */
2554         if (!wdev->netdev)
2555                 info->user_ptr[1] = NULL;
2556
2557         return rdev_del_virtual_intf(rdev, wdev);
2558 }
2559
2560 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2561 {
2562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2563         struct net_device *dev = info->user_ptr[1];
2564         u16 noack_map;
2565
2566         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2567                 return -EINVAL;
2568
2569         if (!rdev->ops->set_noack_map)
2570                 return -EOPNOTSUPP;
2571
2572         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2573
2574         return rdev_set_noack_map(rdev, dev, noack_map);
2575 }
2576
2577 struct get_key_cookie {
2578         struct sk_buff *msg;
2579         int error;
2580         int idx;
2581 };
2582
2583 static void get_key_callback(void *c, struct key_params *params)
2584 {
2585         struct nlattr *key;
2586         struct get_key_cookie *cookie = c;
2587
2588         if ((params->key &&
2589              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2590                      params->key_len, params->key)) ||
2591             (params->seq &&
2592              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2593                      params->seq_len, params->seq)) ||
2594             (params->cipher &&
2595              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2596                          params->cipher)))
2597                 goto nla_put_failure;
2598
2599         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2600         if (!key)
2601                 goto nla_put_failure;
2602
2603         if ((params->key &&
2604              nla_put(cookie->msg, NL80211_KEY_DATA,
2605                      params->key_len, params->key)) ||
2606             (params->seq &&
2607              nla_put(cookie->msg, NL80211_KEY_SEQ,
2608                      params->seq_len, params->seq)) ||
2609             (params->cipher &&
2610              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2611                          params->cipher)))
2612                 goto nla_put_failure;
2613
2614         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2615                 goto nla_put_failure;
2616
2617         nla_nest_end(cookie->msg, key);
2618
2619         return;
2620  nla_put_failure:
2621         cookie->error = 1;
2622 }
2623
2624 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2625 {
2626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2627         int err;
2628         struct net_device *dev = info->user_ptr[1];
2629         u8 key_idx = 0;
2630         const u8 *mac_addr = NULL;
2631         bool pairwise;
2632         struct get_key_cookie cookie = {
2633                 .error = 0,
2634         };
2635         void *hdr;
2636         struct sk_buff *msg;
2637
2638         if (info->attrs[NL80211_ATTR_KEY_IDX])
2639                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2640
2641         if (key_idx > 5)
2642                 return -EINVAL;
2643
2644         if (info->attrs[NL80211_ATTR_MAC])
2645                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2646
2647         pairwise = !!mac_addr;
2648         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2649                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2650                 if (kt >= NUM_NL80211_KEYTYPES)
2651                         return -EINVAL;
2652                 if (kt != NL80211_KEYTYPE_GROUP &&
2653                     kt != NL80211_KEYTYPE_PAIRWISE)
2654                         return -EINVAL;
2655                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2656         }
2657
2658         if (!rdev->ops->get_key)
2659                 return -EOPNOTSUPP;
2660
2661         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2662         if (!msg)
2663                 return -ENOMEM;
2664
2665         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2666                              NL80211_CMD_NEW_KEY);
2667         if (!hdr)
2668                 return -ENOBUFS;
2669
2670         cookie.msg = msg;
2671         cookie.idx = key_idx;
2672
2673         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2674             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2675                 goto nla_put_failure;
2676         if (mac_addr &&
2677             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2678                 goto nla_put_failure;
2679
2680         if (pairwise && mac_addr &&
2681             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2682                 return -ENOENT;
2683
2684         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2685                            get_key_callback);
2686
2687         if (err)
2688                 goto free_msg;
2689
2690         if (cookie.error)
2691                 goto nla_put_failure;
2692
2693         genlmsg_end(msg, hdr);
2694         return genlmsg_reply(msg, info);
2695
2696  nla_put_failure:
2697         err = -ENOBUFS;
2698  free_msg:
2699         nlmsg_free(msg);
2700         return err;
2701 }
2702
2703 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2704 {
2705         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2706         struct key_parse key;
2707         int err;
2708         struct net_device *dev = info->user_ptr[1];
2709
2710         err = nl80211_parse_key(info, &key);
2711         if (err)
2712                 return err;
2713
2714         if (key.idx < 0)
2715                 return -EINVAL;
2716
2717         /* only support setting default key */
2718         if (!key.def && !key.defmgmt)
2719                 return -EINVAL;
2720
2721         wdev_lock(dev->ieee80211_ptr);
2722
2723         if (key.def) {
2724                 if (!rdev->ops->set_default_key) {
2725                         err = -EOPNOTSUPP;
2726                         goto out;
2727                 }
2728
2729                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2730                 if (err)
2731                         goto out;
2732
2733                 err = rdev_set_default_key(rdev, dev, key.idx,
2734                                                  key.def_uni, key.def_multi);
2735
2736                 if (err)
2737                         goto out;
2738
2739 #ifdef CONFIG_CFG80211_WEXT
2740                 dev->ieee80211_ptr->wext.default_key = key.idx;
2741 #endif
2742         } else {
2743                 if (key.def_uni || !key.def_multi) {
2744                         err = -EINVAL;
2745                         goto out;
2746                 }
2747
2748                 if (!rdev->ops->set_default_mgmt_key) {
2749                         err = -EOPNOTSUPP;
2750                         goto out;
2751                 }
2752
2753                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2754                 if (err)
2755                         goto out;
2756
2757                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2758                 if (err)
2759                         goto out;
2760
2761 #ifdef CONFIG_CFG80211_WEXT
2762                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2763 #endif
2764         }
2765
2766  out:
2767         wdev_unlock(dev->ieee80211_ptr);
2768
2769         return err;
2770 }
2771
2772 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2773 {
2774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2775         int err;
2776         struct net_device *dev = info->user_ptr[1];
2777         struct key_parse key;
2778         const u8 *mac_addr = NULL;
2779
2780         err = nl80211_parse_key(info, &key);
2781         if (err)
2782                 return err;
2783
2784         if (!key.p.key)
2785                 return -EINVAL;
2786
2787         if (info->attrs[NL80211_ATTR_MAC])
2788                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2789
2790         if (key.type == -1) {
2791                 if (mac_addr)
2792                         key.type = NL80211_KEYTYPE_PAIRWISE;
2793                 else
2794                         key.type = NL80211_KEYTYPE_GROUP;
2795         }
2796
2797         /* for now */
2798         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2799             key.type != NL80211_KEYTYPE_GROUP)
2800                 return -EINVAL;
2801
2802         if (!rdev->ops->add_key)
2803                 return -EOPNOTSUPP;
2804
2805         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2806                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2807                                            mac_addr))
2808                 return -EINVAL;
2809
2810         wdev_lock(dev->ieee80211_ptr);
2811         err = nl80211_key_allowed(dev->ieee80211_ptr);
2812         if (!err)
2813                 err = rdev_add_key(rdev, dev, key.idx,
2814                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2815                                     mac_addr, &key.p);
2816         wdev_unlock(dev->ieee80211_ptr);
2817
2818         return err;
2819 }
2820
2821 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2822 {
2823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2824         int err;
2825         struct net_device *dev = info->user_ptr[1];
2826         u8 *mac_addr = NULL;
2827         struct key_parse key;
2828
2829         err = nl80211_parse_key(info, &key);
2830         if (err)
2831                 return err;
2832
2833         if (info->attrs[NL80211_ATTR_MAC])
2834                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2835
2836         if (key.type == -1) {
2837                 if (mac_addr)
2838                         key.type = NL80211_KEYTYPE_PAIRWISE;
2839                 else
2840                         key.type = NL80211_KEYTYPE_GROUP;
2841         }
2842
2843         /* for now */
2844         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2845             key.type != NL80211_KEYTYPE_GROUP)
2846                 return -EINVAL;
2847
2848         if (!rdev->ops->del_key)
2849                 return -EOPNOTSUPP;
2850
2851         wdev_lock(dev->ieee80211_ptr);
2852         err = nl80211_key_allowed(dev->ieee80211_ptr);
2853
2854         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2855             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2856                 err = -ENOENT;
2857
2858         if (!err)
2859                 err = rdev_del_key(rdev, dev, key.idx,
2860                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2861                                    mac_addr);
2862
2863 #ifdef CONFIG_CFG80211_WEXT
2864         if (!err) {
2865                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2866                         dev->ieee80211_ptr->wext.default_key = -1;
2867                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2868                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2869         }
2870 #endif
2871         wdev_unlock(dev->ieee80211_ptr);
2872
2873         return err;
2874 }
2875
2876 /* This function returns an error or the number of nested attributes */
2877 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2878 {
2879         struct nlattr *attr;
2880         int n_entries = 0, tmp;
2881
2882         nla_for_each_nested(attr, nl_attr, tmp) {
2883                 if (nla_len(attr) != ETH_ALEN)
2884                         return -EINVAL;
2885
2886                 n_entries++;
2887         }
2888
2889         return n_entries;
2890 }
2891
2892 /*
2893  * This function parses ACL information and allocates memory for ACL data.
2894  * On successful return, the calling function is responsible to free the
2895  * ACL buffer returned by this function.
2896  */
2897 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2898                                                 struct genl_info *info)
2899 {
2900         enum nl80211_acl_policy acl_policy;
2901         struct nlattr *attr;
2902         struct cfg80211_acl_data *acl;
2903         int i = 0, n_entries, tmp;
2904
2905         if (!wiphy->max_acl_mac_addrs)
2906                 return ERR_PTR(-EOPNOTSUPP);
2907
2908         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2909                 return ERR_PTR(-EINVAL);
2910
2911         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2912         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2913             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2914                 return ERR_PTR(-EINVAL);
2915
2916         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2917                 return ERR_PTR(-EINVAL);
2918
2919         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2920         if (n_entries < 0)
2921                 return ERR_PTR(n_entries);
2922
2923         if (n_entries > wiphy->max_acl_mac_addrs)
2924                 return ERR_PTR(-ENOTSUPP);
2925
2926         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2927                       GFP_KERNEL);
2928         if (!acl)
2929                 return ERR_PTR(-ENOMEM);
2930
2931         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2932                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2933                 i++;
2934         }
2935
2936         acl->n_acl_entries = n_entries;
2937         acl->acl_policy = acl_policy;
2938
2939         return acl;
2940 }
2941
2942 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2943 {
2944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2945         struct net_device *dev = info->user_ptr[1];
2946         struct cfg80211_acl_data *acl;
2947         int err;
2948
2949         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2950             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2951                 return -EOPNOTSUPP;
2952
2953         if (!dev->ieee80211_ptr->beacon_interval)
2954                 return -EINVAL;
2955
2956         acl = parse_acl_data(&rdev->wiphy, info);
2957         if (IS_ERR(acl))
2958                 return PTR_ERR(acl);
2959
2960         err = rdev_set_mac_acl(rdev, dev, acl);
2961
2962         kfree(acl);
2963
2964         return err;
2965 }
2966
2967 static int nl80211_parse_beacon(struct nlattr *attrs[],
2968                                 struct cfg80211_beacon_data *bcn)
2969 {
2970         bool haveinfo = false;
2971
2972         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2973             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2974             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2975             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2976                 return -EINVAL;
2977
2978         memset(bcn, 0, sizeof(*bcn));
2979
2980         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
2981                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
2982                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
2983                 if (!bcn->head_len)
2984                         return -EINVAL;
2985                 haveinfo = true;
2986         }
2987
2988         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
2989                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
2990                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
2991                 haveinfo = true;
2992         }
2993
2994         if (!haveinfo)
2995                 return -EINVAL;
2996
2997         if (attrs[NL80211_ATTR_IE]) {
2998                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
2999                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3000         }
3001
3002         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3003                 bcn->proberesp_ies =
3004                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3005                 bcn->proberesp_ies_len =
3006                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3007         }
3008
3009         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3010                 bcn->assocresp_ies =
3011                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3012                 bcn->assocresp_ies_len =
3013                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3014         }
3015
3016         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3017                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3018                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3019         }
3020
3021         return 0;
3022 }
3023
3024 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3025                                    struct cfg80211_ap_settings *params)
3026 {
3027         struct wireless_dev *wdev;
3028         bool ret = false;
3029
3030         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3031                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3032                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3033                         continue;
3034
3035                 if (!wdev->preset_chandef.chan)
3036                         continue;
3037
3038                 params->chandef = wdev->preset_chandef;
3039                 ret = true;
3040                 break;
3041         }
3042
3043         return ret;
3044 }
3045
3046 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3047                                     enum nl80211_auth_type auth_type,
3048                                     enum nl80211_commands cmd)
3049 {
3050         if (auth_type > NL80211_AUTHTYPE_MAX)
3051                 return false;
3052
3053         switch (cmd) {
3054         case NL80211_CMD_AUTHENTICATE:
3055                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3056                     auth_type == NL80211_AUTHTYPE_SAE)
3057                         return false;
3058                 return true;
3059         case NL80211_CMD_CONNECT:
3060         case NL80211_CMD_START_AP:
3061                 /* SAE not supported yet */
3062                 if (auth_type == NL80211_AUTHTYPE_SAE)
3063                         return false;
3064                 return true;
3065         default:
3066                 return false;
3067         }
3068 }
3069
3070 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3071 {
3072         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3073         struct net_device *dev = info->user_ptr[1];
3074         struct wireless_dev *wdev = dev->ieee80211_ptr;
3075         struct cfg80211_ap_settings params;
3076         int err;
3077         u8 radar_detect_width = 0;
3078
3079         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3080             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3081                 return -EOPNOTSUPP;
3082
3083         if (!rdev->ops->start_ap)
3084                 return -EOPNOTSUPP;
3085
3086         if (wdev->beacon_interval)
3087                 return -EALREADY;
3088
3089         memset(&params, 0, sizeof(params));
3090
3091         /* these are required for START_AP */
3092         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3093             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3094             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3095                 return -EINVAL;
3096
3097         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3098         if (err)
3099                 return err;
3100
3101         params.beacon_interval =
3102                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3103         params.dtim_period =
3104                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3105
3106         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3107         if (err)
3108                 return err;
3109
3110         /*
3111          * In theory, some of these attributes should be required here
3112          * but since they were not used when the command was originally
3113          * added, keep them optional for old user space programs to let
3114          * them continue to work with drivers that do not need the
3115          * additional information -- drivers must check!
3116          */
3117         if (info->attrs[NL80211_ATTR_SSID]) {
3118                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3119                 params.ssid_len =
3120                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3121                 if (params.ssid_len == 0 ||
3122                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3123                         return -EINVAL;
3124         }
3125
3126         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3127                 params.hidden_ssid = nla_get_u32(
3128                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3129                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3130                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3131                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3132                         return -EINVAL;
3133         }
3134
3135         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3136
3137         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3138                 params.auth_type = nla_get_u32(
3139                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3140                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3141                                              NL80211_CMD_START_AP))
3142                         return -EINVAL;
3143         } else
3144                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3145
3146         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3147                                       NL80211_MAX_NR_CIPHER_SUITES);
3148         if (err)
3149                 return err;
3150
3151         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3152                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3153                         return -EOPNOTSUPP;
3154                 params.inactivity_timeout = nla_get_u16(
3155                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3156         }
3157
3158         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3159                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3160                         return -EINVAL;
3161                 params.p2p_ctwindow =
3162                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3163                 if (params.p2p_ctwindow > 127)
3164                         return -EINVAL;
3165                 if (params.p2p_ctwindow != 0 &&
3166                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3167                         return -EINVAL;
3168         }
3169
3170         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3171                 u8 tmp;
3172
3173                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3174                         return -EINVAL;
3175                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3176                 if (tmp > 1)
3177                         return -EINVAL;
3178                 params.p2p_opp_ps = tmp;
3179                 if (params.p2p_opp_ps != 0 &&
3180                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3181                         return -EINVAL;
3182         }
3183
3184         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3185                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3186                 if (err)
3187                         return err;
3188         } else if (wdev->preset_chandef.chan) {
3189                 params.chandef = wdev->preset_chandef;
3190         } else if (!nl80211_get_ap_channel(rdev, &params))
3191                 return -EINVAL;
3192
3193         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3194                 return -EINVAL;
3195
3196         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3197         if (err < 0)
3198                 return err;
3199         if (err) {
3200                 radar_detect_width = BIT(params.chandef.width);
3201                 params.radar_required = true;
3202         }
3203
3204         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3205                                            params.chandef.chan,
3206                                            CHAN_MODE_SHARED,
3207                                            radar_detect_width);
3208         if (err)
3209                 return err;
3210
3211         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3212                 params.acl = parse_acl_data(&rdev->wiphy, info);
3213                 if (IS_ERR(params.acl))
3214                         return PTR_ERR(params.acl);
3215         }
3216
3217         err = rdev_start_ap(rdev, dev, &params);
3218         if (!err) {
3219                 wdev->preset_chandef = params.chandef;
3220                 wdev->beacon_interval = params.beacon_interval;
3221                 wdev->channel = params.chandef.chan;
3222                 wdev->ssid_len = params.ssid_len;
3223                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3224         }
3225
3226         kfree(params.acl);
3227
3228         return err;
3229 }
3230
3231 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3232 {
3233         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3234         struct net_device *dev = info->user_ptr[1];
3235         struct wireless_dev *wdev = dev->ieee80211_ptr;
3236         struct cfg80211_beacon_data params;
3237         int err;
3238
3239         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3240             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3241                 return -EOPNOTSUPP;
3242
3243         if (!rdev->ops->change_beacon)
3244                 return -EOPNOTSUPP;
3245
3246         if (!wdev->beacon_interval)
3247                 return -EINVAL;
3248
3249         err = nl80211_parse_beacon(info->attrs, &params);
3250         if (err)
3251                 return err;
3252
3253         return rdev_change_beacon(rdev, dev, &params);
3254 }
3255
3256 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3257 {
3258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3259         struct net_device *dev = info->user_ptr[1];
3260
3261         return cfg80211_stop_ap(rdev, dev);
3262 }
3263
3264 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3265         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3266         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3267         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3268         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3269         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3270         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3271 };
3272
3273 static int parse_station_flags(struct genl_info *info,
3274                                enum nl80211_iftype iftype,
3275                                struct station_parameters *params)
3276 {
3277         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3278         struct nlattr *nla;
3279         int flag;
3280
3281         /*
3282          * Try parsing the new attribute first so userspace
3283          * can specify both for older kernels.
3284          */
3285         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3286         if (nla) {
3287                 struct nl80211_sta_flag_update *sta_flags;
3288
3289                 sta_flags = nla_data(nla);
3290                 params->sta_flags_mask = sta_flags->mask;
3291                 params->sta_flags_set = sta_flags->set;
3292                 params->sta_flags_set &= params->sta_flags_mask;
3293                 if ((params->sta_flags_mask |
3294                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3295                         return -EINVAL;
3296                 return 0;
3297         }
3298
3299         /* if present, parse the old attribute */
3300
3301         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3302         if (!nla)
3303                 return 0;
3304
3305         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3306                              nla, sta_flags_policy))
3307                 return -EINVAL;
3308
3309         /*
3310          * Only allow certain flags for interface types so that
3311          * other attributes are silently ignored. Remember that
3312          * this is backward compatibility code with old userspace
3313          * and shouldn't be hit in other cases anyway.
3314          */
3315         switch (iftype) {
3316         case NL80211_IFTYPE_AP:
3317         case NL80211_IFTYPE_AP_VLAN:
3318         case NL80211_IFTYPE_P2P_GO:
3319                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3320                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3321                                          BIT(NL80211_STA_FLAG_WME) |
3322                                          BIT(NL80211_STA_FLAG_MFP);
3323                 break;
3324         case NL80211_IFTYPE_P2P_CLIENT:
3325         case NL80211_IFTYPE_STATION:
3326                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3327                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3328                 break;
3329         case NL80211_IFTYPE_MESH_POINT:
3330                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3331                                          BIT(NL80211_STA_FLAG_MFP) |
3332                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3333         default:
3334                 return -EINVAL;
3335         }
3336
3337         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3338                 if (flags[flag]) {
3339                         params->sta_flags_set |= (1<<flag);
3340
3341                         /* no longer support new API additions in old API */
3342                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3343                                 return -EINVAL;
3344                 }
3345         }
3346
3347         return 0;
3348 }
3349
3350 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3351                                  int attr)
3352 {
3353         struct nlattr *rate;
3354         u32 bitrate;
3355         u16 bitrate_compat;
3356
3357         rate = nla_nest_start(msg, attr);
3358         if (!rate)
3359                 return false;
3360
3361         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3362         bitrate = cfg80211_calculate_bitrate(info);
3363         /* report 16-bit bitrate only if we can */
3364         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3365         if (bitrate > 0 &&
3366             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3367                 return false;
3368         if (bitrate_compat > 0 &&
3369             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3370                 return false;
3371
3372         if (info->flags & RATE_INFO_FLAGS_MCS) {
3373                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3374                         return false;
3375                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3376                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3377                         return false;
3378                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3379                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3380                         return false;
3381         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3382                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3383                         return false;
3384                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3385                         return false;
3386                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3387                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3388                         return false;
3389                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3390                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3391                         return false;
3392                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3393                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3394                         return false;
3395                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3396                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3397                         return false;
3398                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3399                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3400                         return false;
3401         }
3402
3403         nla_nest_end(msg, rate);
3404         return true;
3405 }
3406
3407 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3408                                int id)
3409 {
3410         void *attr;
3411         int i = 0;
3412
3413         if (!mask)
3414                 return true;
3415
3416         attr = nla_nest_start(msg, id);
3417         if (!attr)
3418                 return false;
3419
3420         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3421                 if (!(mask & BIT(i)))
3422                         continue;
3423
3424                 if (nla_put_u8(msg, i, signal[i]))
3425                         return false;
3426         }
3427
3428         nla_nest_end(msg, attr);
3429
3430         return true;
3431 }
3432
3433 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3434                                 int flags,
3435                                 struct cfg80211_registered_device *rdev,
3436                                 struct net_device *dev,
3437                                 const u8 *mac_addr, struct station_info *sinfo)
3438 {
3439         void *hdr;
3440         struct nlattr *sinfoattr, *bss_param;
3441
3442         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3443         if (!hdr)
3444                 return -1;
3445
3446         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3447             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3448             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3449                 goto nla_put_failure;
3450
3451         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3452         if (!sinfoattr)
3453                 goto nla_put_failure;
3454         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3455             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3456                         sinfo->connected_time))
3457                 goto nla_put_failure;
3458         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3459             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3460                         sinfo->inactive_time))
3461                 goto nla_put_failure;
3462         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3463                               STATION_INFO_RX_BYTES64)) &&
3464             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3465                         (u32)sinfo->rx_bytes))
3466                 goto nla_put_failure;
3467         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3468                               STATION_INFO_TX_BYTES64)) &&
3469             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3470                         (u32)sinfo->tx_bytes))
3471                 goto nla_put_failure;
3472         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3473             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3474                         sinfo->rx_bytes))
3475                 goto nla_put_failure;
3476         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3477             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3478                         sinfo->tx_bytes))
3479                 goto nla_put_failure;
3480         if ((sinfo->filled & STATION_INFO_LLID) &&
3481             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3482                 goto nla_put_failure;
3483         if ((sinfo->filled & STATION_INFO_PLID) &&
3484             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3485                 goto nla_put_failure;
3486         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3487             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3488                        sinfo->plink_state))
3489                 goto nla_put_failure;
3490         switch (rdev->wiphy.signal_type) {
3491         case CFG80211_SIGNAL_TYPE_MBM:
3492                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3493                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3494                                sinfo->signal))
3495                         goto nla_put_failure;
3496                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3497                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3498                                sinfo->signal_avg))
3499                         goto nla_put_failure;
3500                 break;
3501         default:
3502                 break;
3503         }
3504         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3505                 if (!nl80211_put_signal(msg, sinfo->chains,
3506                                         sinfo->chain_signal,
3507                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3508                         goto nla_put_failure;
3509         }
3510         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3511                 if (!nl80211_put_signal(msg, sinfo->chains,
3512                                         sinfo->chain_signal_avg,
3513                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3514                         goto nla_put_failure;
3515         }
3516         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3517                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3518                                           NL80211_STA_INFO_TX_BITRATE))
3519                         goto nla_put_failure;
3520         }
3521         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3522                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3523                                           NL80211_STA_INFO_RX_BITRATE))
3524                         goto nla_put_failure;
3525         }
3526         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3527             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3528                         sinfo->rx_packets))
3529                 goto nla_put_failure;
3530         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3531             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3532                         sinfo->tx_packets))
3533                 goto nla_put_failure;
3534         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3535             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3536                         sinfo->tx_retries))
3537                 goto nla_put_failure;
3538         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3539             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3540                         sinfo->tx_failed))
3541                 goto nla_put_failure;
3542         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3543             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3544                         sinfo->beacon_loss_count))
3545                 goto nla_put_failure;
3546         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3547             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3548                         sinfo->local_pm))
3549                 goto nla_put_failure;
3550         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3551             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3552                         sinfo->peer_pm))
3553                 goto nla_put_failure;
3554         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3555             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3556                         sinfo->nonpeer_pm))
3557                 goto nla_put_failure;
3558         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3559                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3560                 if (!bss_param)
3561                         goto nla_put_failure;
3562
3563                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3564                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3565                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3566                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3567                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3568                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3569                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3570                                sinfo->bss_param.dtim_period) ||
3571                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3572                                 sinfo->bss_param.beacon_interval))
3573                         goto nla_put_failure;
3574
3575                 nla_nest_end(msg, bss_param);
3576         }
3577         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3578             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3579                     sizeof(struct nl80211_sta_flag_update),
3580                     &sinfo->sta_flags))
3581                 goto nla_put_failure;
3582         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3583                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3584                             sinfo->t_offset))
3585                 goto nla_put_failure;
3586         nla_nest_end(msg, sinfoattr);
3587
3588         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3589             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3590                     sinfo->assoc_req_ies))
3591                 goto nla_put_failure;
3592
3593         return genlmsg_end(msg, hdr);
3594
3595  nla_put_failure:
3596         genlmsg_cancel(msg, hdr);
3597         return -EMSGSIZE;
3598 }
3599
3600 static int nl80211_dump_station(struct sk_buff *skb,
3601                                 struct netlink_callback *cb)
3602 {
3603         struct station_info sinfo;
3604         struct cfg80211_registered_device *dev;
3605         struct wireless_dev *wdev;
3606         u8 mac_addr[ETH_ALEN];
3607         int sta_idx = cb->args[2];
3608         int err;
3609
3610         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3611         if (err)
3612                 return err;
3613
3614         if (!wdev->netdev) {
3615                 err = -EINVAL;
3616                 goto out_err;
3617         }
3618
3619         if (!dev->ops->dump_station) {
3620                 err = -EOPNOTSUPP;
3621                 goto out_err;
3622         }
3623
3624         while (1) {
3625                 memset(&sinfo, 0, sizeof(sinfo));
3626                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3627                                         mac_addr, &sinfo);
3628                 if (err == -ENOENT)
3629                         break;
3630                 if (err)
3631                         goto out_err;
3632
3633                 if (nl80211_send_station(skb,
3634                                 NETLINK_CB(cb->skb).portid,
3635                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3636                                 dev, wdev->netdev, mac_addr,
3637                                 &sinfo) < 0)
3638                         goto out;
3639
3640                 sta_idx++;
3641         }
3642
3643
3644  out:
3645         cb->args[2] = sta_idx;
3646         err = skb->len;
3647  out_err:
3648         nl80211_finish_wdev_dump(dev);
3649
3650         return err;
3651 }
3652
3653 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3654 {
3655         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3656         struct net_device *dev = info->user_ptr[1];
3657         struct station_info sinfo;
3658         struct sk_buff *msg;
3659         u8 *mac_addr = NULL;
3660         int err;
3661
3662         memset(&sinfo, 0, sizeof(sinfo));
3663
3664         if (!info->attrs[NL80211_ATTR_MAC])
3665                 return -EINVAL;
3666
3667         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3668
3669         if (!rdev->ops->get_station)
3670                 return -EOPNOTSUPP;
3671
3672         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3673         if (err)
3674                 return err;
3675
3676         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3677         if (!msg)
3678                 return -ENOMEM;
3679
3680         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3681                                  rdev, dev, mac_addr, &sinfo) < 0) {
3682                 nlmsg_free(msg);
3683                 return -ENOBUFS;
3684         }
3685
3686         return genlmsg_reply(msg, info);
3687 }
3688
3689 int cfg80211_check_station_change(struct wiphy *wiphy,
3690                                   struct station_parameters *params,
3691                                   enum cfg80211_station_type statype)
3692 {
3693         if (params->listen_interval != -1)
3694                 return -EINVAL;
3695         if (params->aid)
3696                 return -EINVAL;
3697
3698         /* When you run into this, adjust the code below for the new flag */
3699         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3700
3701         switch (statype) {
3702         case CFG80211_STA_MESH_PEER_KERNEL:
3703         case CFG80211_STA_MESH_PEER_USER:
3704                 /*
3705                  * No ignoring the TDLS flag here -- the userspace mesh
3706                  * code doesn't have the bug of including TDLS in the
3707                  * mask everywhere.
3708                  */
3709                 if (params->sta_flags_mask &
3710                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3711                                   BIT(NL80211_STA_FLAG_MFP) |
3712                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3713                         return -EINVAL;
3714                 break;
3715         case CFG80211_STA_TDLS_PEER_SETUP:
3716         case CFG80211_STA_TDLS_PEER_ACTIVE:
3717                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3718                         return -EINVAL;
3719                 /* ignore since it can't change */
3720                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3721                 break;
3722         default:
3723                 /* disallow mesh-specific things */
3724                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3725                         return -EINVAL;
3726                 if (params->local_pm)
3727                         return -EINVAL;
3728                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3729                         return -EINVAL;
3730         }
3731
3732         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3733             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3734                 /* TDLS can't be set, ... */
3735                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3736                         return -EINVAL;
3737                 /*
3738                  * ... but don't bother the driver with it. This works around
3739                  * a hostapd/wpa_supplicant issue -- it always includes the
3740                  * TLDS_PEER flag in the mask even for AP mode.
3741                  */
3742                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3743         }
3744
3745         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3746                 /* reject other things that can't change */
3747                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3748                         return -EINVAL;
3749                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3750                         return -EINVAL;
3751                 if (params->supported_rates)
3752                         return -EINVAL;
3753                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3754                         return -EINVAL;
3755         }
3756
3757         if (statype != CFG80211_STA_AP_CLIENT) {
3758                 if (params->vlan)
3759                         return -EINVAL;
3760         }
3761
3762         switch (statype) {
3763         case CFG80211_STA_AP_MLME_CLIENT:
3764                 /* Use this only for authorizing/unauthorizing a station */
3765                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3766                         return -EOPNOTSUPP;
3767                 break;
3768         case CFG80211_STA_AP_CLIENT:
3769                 /* accept only the listed bits */
3770                 if (params->sta_flags_mask &
3771                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3772                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3773                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3774                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3775                                   BIT(NL80211_STA_FLAG_WME) |
3776                                   BIT(NL80211_STA_FLAG_MFP)))
3777                         return -EINVAL;
3778
3779                 /* but authenticated/associated only if driver handles it */
3780                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3781                     params->sta_flags_mask &
3782                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3783                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3784                         return -EINVAL;
3785                 break;
3786         case CFG80211_STA_IBSS:
3787         case CFG80211_STA_AP_STA:
3788                 /* reject any changes other than AUTHORIZED */
3789                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3790                         return -EINVAL;
3791                 break;
3792         case CFG80211_STA_TDLS_PEER_SETUP:
3793                 /* reject any changes other than AUTHORIZED or WME */
3794                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3795                                                BIT(NL80211_STA_FLAG_WME)))
3796                         return -EINVAL;
3797                 /* force (at least) rates when authorizing */
3798                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3799                     !params->supported_rates)
3800                         return -EINVAL;
3801                 break;
3802         case CFG80211_STA_TDLS_PEER_ACTIVE:
3803                 /* reject any changes */
3804                 return -EINVAL;
3805         case CFG80211_STA_MESH_PEER_KERNEL:
3806                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3807                         return -EINVAL;
3808                 break;
3809         case CFG80211_STA_MESH_PEER_USER:
3810                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3811                         return -EINVAL;
3812                 break;
3813         }
3814
3815         return 0;
3816 }
3817 EXPORT_SYMBOL(cfg80211_check_station_change);
3818
3819 /*
3820  * Get vlan interface making sure it is running and on the right wiphy.
3821  */
3822 static struct net_device *get_vlan(struct genl_info *info,
3823                                    struct cfg80211_registered_device *rdev)
3824 {
3825         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3826         struct net_device *v;
3827         int ret;
3828
3829         if (!vlanattr)
3830                 return NULL;
3831
3832         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3833         if (!v)
3834                 return ERR_PTR(-ENODEV);
3835
3836         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3837                 ret = -EINVAL;
3838                 goto error;
3839         }
3840
3841         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3842             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3843             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3844                 ret = -EINVAL;
3845                 goto error;
3846         }
3847
3848         if (!netif_running(v)) {
3849                 ret = -ENETDOWN;
3850                 goto error;
3851         }
3852
3853         return v;
3854  error:
3855         dev_put(v);
3856         return ERR_PTR(ret);
3857 }
3858
3859 static struct nla_policy
3860 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3861         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3862         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3863 };
3864
3865 static int nl80211_parse_sta_wme(struct genl_info *info,
3866                                  struct station_parameters *params)
3867 {
3868         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3869         struct nlattr *nla;
3870         int err;
3871
3872         /* parse WME attributes if present */
3873         if (!info->attrs[NL80211_ATTR_STA_WME])
3874                 return 0;
3875
3876         nla = info->attrs[NL80211_ATTR_STA_WME];
3877         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3878                                nl80211_sta_wme_policy);
3879         if (err)
3880                 return err;
3881
3882         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3883                 params->uapsd_queues = nla_get_u8(
3884                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3885         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3886                 return -EINVAL;
3887
3888         if (tb[NL80211_STA_WME_MAX_SP])
3889                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3890
3891         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3892                 return -EINVAL;
3893
3894         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3895
3896         return 0;
3897 }
3898
3899 static int nl80211_set_station_tdls(struct genl_info *info,
3900                                     struct station_parameters *params)
3901 {
3902         /* Dummy STA entry gets updated once the peer capabilities are known */
3903         if (info->attrs[NL80211_ATTR_PEER_AID])
3904                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3905         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3906                 params->ht_capa =
3907                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3908         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3909                 params->vht_capa =
3910                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3911
3912         return nl80211_parse_sta_wme(info, params);
3913 }
3914
3915 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3916 {
3917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3918         struct net_device *dev = info->user_ptr[1];
3919         struct station_parameters params;
3920         u8 *mac_addr;
3921         int err;
3922
3923         memset(&params, 0, sizeof(params));
3924
3925         params.listen_interval = -1;
3926
3927         if (!rdev->ops->change_station)
3928                 return -EOPNOTSUPP;
3929
3930         if (info->attrs[NL80211_ATTR_STA_AID])
3931                 return -EINVAL;
3932
3933         if (!info->attrs[NL80211_ATTR_MAC])
3934                 return -EINVAL;
3935
3936         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3937
3938         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3939                 params.supported_rates =
3940                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3941                 params.supported_rates_len =
3942                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3943         }
3944
3945         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3946                 params.capability =
3947                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3948                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3949         }
3950
3951         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3952                 params.ext_capab =
3953                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3954                 params.ext_capab_len =
3955                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3956         }
3957
3958         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3959                 return -EINVAL;
3960
3961         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3962                 return -EINVAL;
3963
3964         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3965                 params.plink_action =
3966                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3967                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3968                         return -EINVAL;
3969         }
3970
3971         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3972                 params.plink_state =
3973                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3974                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3975                         return -EINVAL;
3976                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3977         }
3978
3979         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3980                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3981                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3982
3983                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3984                     pm > NL80211_MESH_POWER_MAX)
3985                         return -EINVAL;
3986
3987                 params.local_pm = pm;
3988         }
3989
3990         /* Include parameters for TDLS peer (will check later) */
3991         err = nl80211_set_station_tdls(info, &params);
3992         if (err)
3993                 return err;
3994
3995         params.vlan = get_vlan(info, rdev);
3996         if (IS_ERR(params.vlan))
3997                 return PTR_ERR(params.vlan);
3998
3999         switch (dev->ieee80211_ptr->iftype) {
4000         case NL80211_IFTYPE_AP:
4001         case NL80211_IFTYPE_AP_VLAN:
4002         case NL80211_IFTYPE_P2P_GO:
4003         case NL80211_IFTYPE_P2P_CLIENT:
4004         case NL80211_IFTYPE_STATION:
4005         case NL80211_IFTYPE_ADHOC:
4006         case NL80211_IFTYPE_MESH_POINT:
4007                 break;
4008         default:
4009                 err = -EOPNOTSUPP;
4010                 goto out_put_vlan;
4011         }
4012
4013         /* driver will call cfg80211_check_station_change() */
4014         err = rdev_change_station(rdev, dev, mac_addr, &params);
4015
4016  out_put_vlan:
4017         if (params.vlan)
4018                 dev_put(params.vlan);
4019
4020         return err;
4021 }
4022
4023 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4024 {
4025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4026         int err;
4027         struct net_device *dev = info->user_ptr[1];
4028         struct station_parameters params;
4029         u8 *mac_addr = NULL;
4030
4031         memset(&params, 0, sizeof(params));
4032
4033         if (!rdev->ops->add_station)
4034                 return -EOPNOTSUPP;
4035
4036         if (!info->attrs[NL80211_ATTR_MAC])
4037                 return -EINVAL;
4038
4039         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4040                 return -EINVAL;
4041
4042         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4043                 return -EINVAL;
4044
4045         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4046             !info->attrs[NL80211_ATTR_PEER_AID])
4047                 return -EINVAL;
4048
4049         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4050         params.supported_rates =
4051                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4052         params.supported_rates_len =
4053                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4054         params.listen_interval =
4055                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4056
4057         if (info->attrs[NL80211_ATTR_PEER_AID])
4058                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4059         else
4060                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4061         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4062                 return -EINVAL;
4063
4064         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4065                 params.capability =
4066                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4067                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4068         }
4069
4070         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4071                 params.ext_capab =
4072                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4073                 params.ext_capab_len =
4074                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4075         }
4076
4077         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4078                 params.ht_capa =
4079                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4080
4081         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4082                 params.vht_capa =
4083                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4084
4085         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4086                 params.plink_action =
4087                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4088                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4089                         return -EINVAL;
4090         }
4091
4092         err = nl80211_parse_sta_wme(info, &params);
4093         if (err)
4094                 return err;
4095
4096         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4097                 return -EINVAL;
4098
4099         /* When you run into this, adjust the code below for the new flag */
4100         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4101
4102         switch (dev->ieee80211_ptr->iftype) {
4103         case NL80211_IFTYPE_AP:
4104         case NL80211_IFTYPE_AP_VLAN:
4105         case NL80211_IFTYPE_P2P_GO:
4106                 /* ignore WME attributes if iface/sta is not capable */
4107                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4108                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4109                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4110
4111                 /* TDLS peers cannot be added */
4112                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4113                     info->attrs[NL80211_ATTR_PEER_AID])
4114                         return -EINVAL;
4115                 /* but don't bother the driver with it */
4116                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4117
4118                 /* allow authenticated/associated only if driver handles it */
4119                 if (!(rdev->wiphy.features &
4120                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4121                     params.sta_flags_mask &
4122                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4123                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4124                         return -EINVAL;
4125
4126                 /* must be last in here for error handling */
4127                 params.vlan = get_vlan(info, rdev);
4128                 if (IS_ERR(params.vlan))
4129                         return PTR_ERR(params.vlan);
4130                 break;
4131         case NL80211_IFTYPE_MESH_POINT:
4132                 /* ignore uAPSD data */
4133                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4134
4135                 /* associated is disallowed */
4136                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4137                         return -EINVAL;
4138                 /* TDLS peers cannot be added */
4139                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4140                     info->attrs[NL80211_ATTR_PEER_AID])
4141                         return -EINVAL;
4142                 break;
4143         case NL80211_IFTYPE_STATION:
4144         case NL80211_IFTYPE_P2P_CLIENT:
4145                 /* ignore uAPSD data */
4146                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4147
4148                 /* these are disallowed */
4149                 if (params.sta_flags_mask &
4150                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4151                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4152                         return -EINVAL;
4153                 /* Only TDLS peers can be added */
4154                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4155                         return -EINVAL;
4156                 /* Can only add if TDLS ... */
4157                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4158                         return -EOPNOTSUPP;
4159                 /* ... with external setup is supported */
4160                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4161                         return -EOPNOTSUPP;
4162                 /*
4163                  * Older wpa_supplicant versions always mark the TDLS peer
4164                  * as authorized, but it shouldn't yet be.
4165                  */
4166                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4167                 break;
4168         default:
4169                 return -EOPNOTSUPP;
4170         }
4171
4172         /* be aware of params.vlan when changing code here */
4173
4174         err = rdev_add_station(rdev, dev, mac_addr, &params);
4175
4176         if (params.vlan)
4177                 dev_put(params.vlan);
4178         return err;
4179 }
4180
4181 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4182 {
4183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4184         struct net_device *dev = info->user_ptr[1];
4185         u8 *mac_addr = NULL;
4186
4187         if (info->attrs[NL80211_ATTR_MAC])
4188                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4189
4190         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4191             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4192             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4193             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4194                 return -EINVAL;
4195
4196         if (!rdev->ops->del_station)
4197                 return -EOPNOTSUPP;
4198
4199         return rdev_del_station(rdev, dev, mac_addr);
4200 }
4201
4202 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4203                                 int flags, struct net_device *dev,
4204                                 u8 *dst, u8 *next_hop,
4205                                 struct mpath_info *pinfo)
4206 {
4207         void *hdr;
4208         struct nlattr *pinfoattr;
4209
4210         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4211         if (!hdr)
4212                 return -1;
4213
4214         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4216             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4217             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4218                 goto nla_put_failure;
4219
4220         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4221         if (!pinfoattr)
4222                 goto nla_put_failure;
4223         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4224             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4225                         pinfo->frame_qlen))
4226                 goto nla_put_failure;
4227         if (((pinfo->filled & MPATH_INFO_SN) &&
4228              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4229             ((pinfo->filled & MPATH_INFO_METRIC) &&
4230              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4231                          pinfo->metric)) ||
4232             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4233              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4234                          pinfo->exptime)) ||
4235             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4236              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4237                         pinfo->flags)) ||
4238             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4239              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4240                          pinfo->discovery_timeout)) ||
4241             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4242              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4243                         pinfo->discovery_retries)))
4244                 goto nla_put_failure;
4245
4246         nla_nest_end(msg, pinfoattr);
4247
4248         return genlmsg_end(msg, hdr);
4249
4250  nla_put_failure:
4251         genlmsg_cancel(msg, hdr);
4252         return -EMSGSIZE;
4253 }
4254
4255 static int nl80211_dump_mpath(struct sk_buff *skb,
4256                               struct netlink_callback *cb)
4257 {
4258         struct mpath_info pinfo;
4259         struct cfg80211_registered_device *dev;
4260         struct wireless_dev *wdev;
4261         u8 dst[ETH_ALEN];
4262         u8 next_hop[ETH_ALEN];
4263         int path_idx = cb->args[2];
4264         int err;
4265
4266         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4267         if (err)
4268                 return err;
4269
4270         if (!dev->ops->dump_mpath) {
4271                 err = -EOPNOTSUPP;
4272                 goto out_err;
4273         }
4274
4275         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4276                 err = -EOPNOTSUPP;
4277                 goto out_err;
4278         }
4279
4280         while (1) {
4281                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4282                                       next_hop, &pinfo);
4283                 if (err == -ENOENT)
4284                         break;
4285                 if (err)
4286                         goto out_err;
4287
4288                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4289                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4290                                        wdev->netdev, dst, next_hop,
4291                                        &pinfo) < 0)
4292                         goto out;
4293
4294                 path_idx++;
4295         }
4296
4297
4298  out:
4299         cb->args[2] = path_idx;
4300         err = skb->len;
4301  out_err:
4302         nl80211_finish_wdev_dump(dev);
4303         return err;
4304 }
4305
4306 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4307 {
4308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4309         int err;
4310         struct net_device *dev = info->user_ptr[1];
4311         struct mpath_info pinfo;
4312         struct sk_buff *msg;
4313         u8 *dst = NULL;
4314         u8 next_hop[ETH_ALEN];
4315
4316         memset(&pinfo, 0, sizeof(pinfo));
4317
4318         if (!info->attrs[NL80211_ATTR_MAC])
4319                 return -EINVAL;
4320
4321         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4322
4323         if (!rdev->ops->get_mpath)
4324                 return -EOPNOTSUPP;
4325
4326         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4327                 return -EOPNOTSUPP;
4328
4329         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4330         if (err)
4331                 return err;
4332
4333         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4334         if (!msg)
4335                 return -ENOMEM;
4336
4337         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4338                                  dev, dst, next_hop, &pinfo) < 0) {
4339                 nlmsg_free(msg);
4340                 return -ENOBUFS;
4341         }
4342
4343         return genlmsg_reply(msg, info);
4344 }
4345
4346 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4347 {
4348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4349         struct net_device *dev = info->user_ptr[1];
4350         u8 *dst = NULL;
4351         u8 *next_hop = NULL;
4352
4353         if (!info->attrs[NL80211_ATTR_MAC])
4354                 return -EINVAL;
4355
4356         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4357                 return -EINVAL;
4358
4359         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4360         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4361
4362         if (!rdev->ops->change_mpath)
4363                 return -EOPNOTSUPP;
4364
4365         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4366                 return -EOPNOTSUPP;
4367
4368         return rdev_change_mpath(rdev, dev, dst, next_hop);
4369 }
4370
4371 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4372 {
4373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4374         struct net_device *dev = info->user_ptr[1];
4375         u8 *dst = NULL;
4376         u8 *next_hop = NULL;
4377
4378         if (!info->attrs[NL80211_ATTR_MAC])
4379                 return -EINVAL;
4380
4381         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4382                 return -EINVAL;
4383
4384         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4385         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4386
4387         if (!rdev->ops->add_mpath)
4388                 return -EOPNOTSUPP;
4389
4390         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4391                 return -EOPNOTSUPP;
4392
4393         return rdev_add_mpath(rdev, dev, dst, next_hop);
4394 }
4395
4396 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4397 {
4398         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4399         struct net_device *dev = info->user_ptr[1];
4400         u8 *dst = NULL;
4401
4402         if (info->attrs[NL80211_ATTR_MAC])
4403                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4404
4405         if (!rdev->ops->del_mpath)
4406                 return -EOPNOTSUPP;
4407
4408         return rdev_del_mpath(rdev, dev, dst);
4409 }
4410
4411 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4412 {
4413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4414         struct net_device *dev = info->user_ptr[1];
4415         struct bss_parameters params;
4416
4417         memset(&params, 0, sizeof(params));
4418         /* default to not changing parameters */
4419         params.use_cts_prot = -1;
4420         params.use_short_preamble = -1;
4421         params.use_short_slot_time = -1;
4422         params.ap_isolate = -1;
4423         params.ht_opmode = -1;
4424         params.p2p_ctwindow = -1;
4425         params.p2p_opp_ps = -1;
4426
4427         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4428                 params.use_cts_prot =
4429                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4430         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4431                 params.use_short_preamble =
4432                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4433         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4434                 params.use_short_slot_time =
4435                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4436         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4437                 params.basic_rates =
4438                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4439                 params.basic_rates_len =
4440                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4441         }
4442         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4443                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4444         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4445                 params.ht_opmode =
4446                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4447
4448         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4449                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4450                         return -EINVAL;
4451                 params.p2p_ctwindow =
4452                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4453                 if (params.p2p_ctwindow < 0)
4454                         return -EINVAL;
4455                 if (params.p2p_ctwindow != 0 &&
4456                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4457                         return -EINVAL;
4458         }
4459
4460         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4461                 u8 tmp;
4462
4463                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4464                         return -EINVAL;
4465                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4466                 if (tmp > 1)
4467                         return -EINVAL;
4468                 params.p2p_opp_ps = tmp;
4469                 if (params.p2p_opp_ps &&
4470                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4471                         return -EINVAL;
4472         }
4473
4474         if (!rdev->ops->change_bss)
4475                 return -EOPNOTSUPP;
4476
4477         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4478             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4479                 return -EOPNOTSUPP;
4480
4481         return rdev_change_bss(rdev, dev, &params);
4482 }
4483
4484 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4485         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4486         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4487         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4488         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4489         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4490         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4491 };
4492
4493 static int parse_reg_rule(struct nlattr *tb[],
4494         struct ieee80211_reg_rule *reg_rule)
4495 {
4496         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4497         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4498
4499         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4500                 return -EINVAL;
4501         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4502                 return -EINVAL;
4503         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4504                 return -EINVAL;
4505         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4506                 return -EINVAL;
4507         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4508                 return -EINVAL;
4509
4510         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4511
4512         freq_range->start_freq_khz =
4513                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4514         freq_range->end_freq_khz =
4515                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4516         freq_range->max_bandwidth_khz =
4517                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4518
4519         power_rule->max_eirp =
4520                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4521
4522         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4523                 power_rule->max_antenna_gain =
4524                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4525
4526         return 0;
4527 }
4528
4529 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4530 {
4531         int r;
4532         char *data = NULL;
4533         enum nl80211_user_reg_hint_type user_reg_hint_type;
4534
4535         /*
4536          * You should only get this when cfg80211 hasn't yet initialized
4537          * completely when built-in to the kernel right between the time
4538          * window between nl80211_init() and regulatory_init(), if that is
4539          * even possible.
4540          */
4541         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4542                 return -EINPROGRESS;
4543
4544         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4545                 return -EINVAL;
4546
4547         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4548
4549         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4550                 user_reg_hint_type =
4551                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4552         else
4553                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4554
4555         switch (user_reg_hint_type) {
4556         case NL80211_USER_REG_HINT_USER:
4557         case NL80211_USER_REG_HINT_CELL_BASE:
4558                 break;
4559         default:
4560                 return -EINVAL;
4561         }
4562
4563         r = regulatory_hint_user(data, user_reg_hint_type);
4564
4565         return r;
4566 }
4567
4568 static int nl80211_get_mesh_config(struct sk_buff *skb,
4569                                    struct genl_info *info)
4570 {
4571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4572         struct net_device *dev = info->user_ptr[1];
4573         struct wireless_dev *wdev = dev->ieee80211_ptr;
4574         struct mesh_config cur_params;
4575         int err = 0;
4576         void *hdr;
4577         struct nlattr *pinfoattr;
4578         struct sk_buff *msg;
4579
4580         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4581                 return -EOPNOTSUPP;
4582
4583         if (!rdev->ops->get_mesh_config)
4584                 return -EOPNOTSUPP;
4585
4586         wdev_lock(wdev);
4587         /* If not connected, get default parameters */
4588         if (!wdev->mesh_id_len)
4589                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4590         else
4591                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4592         wdev_unlock(wdev);
4593
4594         if (err)
4595                 return err;
4596
4597         /* Draw up a netlink message to send back */
4598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4599         if (!msg)
4600                 return -ENOMEM;
4601         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4602                              NL80211_CMD_GET_MESH_CONFIG);
4603         if (!hdr)
4604                 goto out;
4605         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4606         if (!pinfoattr)
4607                 goto nla_put_failure;
4608         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4609             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4610                         cur_params.dot11MeshRetryTimeout) ||
4611             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4612                         cur_params.dot11MeshConfirmTimeout) ||
4613             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4614                         cur_params.dot11MeshHoldingTimeout) ||
4615             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4616                         cur_params.dot11MeshMaxPeerLinks) ||
4617             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4618                        cur_params.dot11MeshMaxRetries) ||
4619             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4620                        cur_params.dot11MeshTTL) ||
4621             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4622                        cur_params.element_ttl) ||
4623             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4624                        cur_params.auto_open_plinks) ||
4625             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4626                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4627             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4628                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4629             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4630                         cur_params.path_refresh_time) ||
4631             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4632                         cur_params.min_discovery_timeout) ||
4633             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4634                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4635             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4636                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4637             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4638                         cur_params.dot11MeshHWMPperrMinInterval) ||
4639             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4640                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4641             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4642                        cur_params.dot11MeshHWMPRootMode) ||
4643             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4644                         cur_params.dot11MeshHWMPRannInterval) ||
4645             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4646                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4647             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4648                        cur_params.dot11MeshForwarding) ||
4649             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4650                         cur_params.rssi_threshold) ||
4651             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4652                         cur_params.ht_opmode) ||
4653             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4654                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4655             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4656                         cur_params.dot11MeshHWMProotInterval) ||
4657             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4658                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4659             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4660                         cur_params.power_mode) ||
4661             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4662                         cur_params.dot11MeshAwakeWindowDuration) ||
4663             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4664                         cur_params.plink_timeout))
4665                 goto nla_put_failure;
4666         nla_nest_end(msg, pinfoattr);
4667         genlmsg_end(msg, hdr);
4668         return genlmsg_reply(msg, info);
4669
4670  nla_put_failure:
4671         genlmsg_cancel(msg, hdr);
4672  out:
4673         nlmsg_free(msg);
4674         return -ENOBUFS;
4675 }
4676
4677 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4678         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4679         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4680         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4681         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4682         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4683         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4684         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4685         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4686         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4687         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4688         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4689         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4690         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4691         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4692         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4693         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4694         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4695         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4696         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4697         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4698         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4699         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4700         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4701         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4702         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4703         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4704         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4705         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4706 };
4707
4708 static const struct nla_policy
4709         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4710         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4711         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4712         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4713         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4714         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4715         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4716         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4717                                     .len = IEEE80211_MAX_DATA_LEN },
4718         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4719 };
4720
4721 static int nl80211_parse_mesh_config(struct genl_info *info,
4722                                      struct mesh_config *cfg,
4723                                      u32 *mask_out)
4724 {
4725         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4726         u32 mask = 0;
4727
4728 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4729 do {                                                                        \
4730         if (tb[attr]) {                                                     \
4731                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4732                         return -EINVAL;                                     \
4733                 cfg->param = fn(tb[attr]);                                  \
4734                 mask |= (1 << (attr - 1));                                  \
4735         }                                                                   \
4736 } while (0)
4737
4738
4739         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4740                 return -EINVAL;
4741         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4742                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4743                              nl80211_meshconf_params_policy))
4744                 return -EINVAL;
4745
4746         /* This makes sure that there aren't more than 32 mesh config
4747          * parameters (otherwise our bitfield scheme would not work.) */
4748         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4749
4750         /* Fill in the params struct */
4751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4752                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4753                                   nla_get_u16);
4754         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4755                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4756                                   nla_get_u16);
4757         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4758                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4759                                   nla_get_u16);
4760         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4761                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4762                                   nla_get_u16);
4763         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4764                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4765                                   nla_get_u8);
4766         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4767                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4768         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4769                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4770                                   nla_get_u8);
4771         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4772                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4773                                   nla_get_u8);
4774         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4775                                   1, 255, mask,
4776                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4777                                   nla_get_u32);
4778         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4779                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4780                                   nla_get_u8);
4781         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4782                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4783                                   nla_get_u32);
4784         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4785                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4786                                   nla_get_u16);
4787         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4788                                   1, 65535, mask,
4789                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4790                                   nla_get_u32);
4791         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4792                                   1, 65535, mask,
4793                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4794                                   nla_get_u16);
4795         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4796                                   1, 65535, mask,
4797                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4798                                   nla_get_u16);
4799         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4800                                   dot11MeshHWMPnetDiameterTraversalTime,
4801                                   1, 65535, mask,
4802                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4803                                   nla_get_u16);
4804         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4805                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4806                                   nla_get_u8);
4807         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4808                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4809                                   nla_get_u16);
4810         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4811                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4812                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4813                                   nla_get_u8);
4814         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4815                                   mask, NL80211_MESHCONF_FORWARDING,
4816                                   nla_get_u8);
4817         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4818                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4819                                   nla_get_s32);
4820         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4821                                   mask, NL80211_MESHCONF_HT_OPMODE,
4822                                   nla_get_u16);
4823         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4824                                   1, 65535, mask,
4825                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4826                                   nla_get_u32);
4827         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4828                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4829                                   nla_get_u16);
4830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4831                                   dot11MeshHWMPconfirmationInterval,
4832                                   1, 65535, mask,
4833                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4834                                   nla_get_u16);
4835         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4836                                   NL80211_MESH_POWER_ACTIVE,
4837                                   NL80211_MESH_POWER_MAX,
4838                                   mask, NL80211_MESHCONF_POWER_MODE,
4839                                   nla_get_u32);
4840         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4841                                   0, 65535, mask,
4842                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4843         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4844                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4845                                   nla_get_u32);
4846         if (mask_out)
4847                 *mask_out = mask;
4848
4849         return 0;
4850
4851 #undef FILL_IN_MESH_PARAM_IF_SET
4852 }
4853
4854 static int nl80211_parse_mesh_setup(struct genl_info *info,
4855                                      struct mesh_setup *setup)
4856 {
4857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4858         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4859
4860         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4861                 return -EINVAL;
4862         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4863                              info->attrs[NL80211_ATTR_MESH_SETUP],
4864                              nl80211_mesh_setup_params_policy))
4865                 return -EINVAL;
4866
4867         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4868                 setup->sync_method =
4869                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4870                  IEEE80211_SYNC_METHOD_VENDOR :
4871                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4872
4873         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4874                 setup->path_sel_proto =
4875                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4876                  IEEE80211_PATH_PROTOCOL_VENDOR :
4877                  IEEE80211_PATH_PROTOCOL_HWMP;
4878
4879         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4880                 setup->path_metric =
4881                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4882                  IEEE80211_PATH_METRIC_VENDOR :
4883                  IEEE80211_PATH_METRIC_AIRTIME;
4884
4885
4886         if (tb[NL80211_MESH_SETUP_IE]) {
4887                 struct nlattr *ieattr =
4888                         tb[NL80211_MESH_SETUP_IE];
4889                 if (!is_valid_ie_attr(ieattr))
4890                         return -EINVAL;
4891                 setup->ie = nla_data(ieattr);
4892                 setup->ie_len = nla_len(ieattr);
4893         }
4894         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4895             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4896                 return -EINVAL;
4897         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4898         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4899         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4900         if (setup->is_secure)
4901                 setup->user_mpm = true;
4902
4903         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4904                 if (!setup->user_mpm)
4905                         return -EINVAL;
4906                 setup->auth_id =
4907                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4908         }
4909
4910         return 0;
4911 }
4912
4913 static int nl80211_update_mesh_config(struct sk_buff *skb,
4914                                       struct genl_info *info)
4915 {
4916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4917         struct net_device *dev = info->user_ptr[1];
4918         struct wireless_dev *wdev = dev->ieee80211_ptr;
4919         struct mesh_config cfg;
4920         u32 mask;
4921         int err;
4922
4923         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4924                 return -EOPNOTSUPP;
4925
4926         if (!rdev->ops->update_mesh_config)
4927                 return -EOPNOTSUPP;
4928
4929         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4930         if (err)
4931                 return err;
4932
4933         wdev_lock(wdev);
4934         if (!wdev->mesh_id_len)
4935                 err = -ENOLINK;
4936
4937         if (!err)
4938                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4939
4940         wdev_unlock(wdev);
4941
4942         return err;
4943 }
4944
4945 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4946 {
4947         const struct ieee80211_regdomain *regdom;
4948         struct sk_buff *msg;
4949         void *hdr = NULL;
4950         struct nlattr *nl_reg_rules;
4951         unsigned int i;
4952
4953         if (!cfg80211_regdomain)
4954                 return -EINVAL;
4955
4956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4957         if (!msg)
4958                 return -ENOBUFS;
4959
4960         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4961                              NL80211_CMD_GET_REG);
4962         if (!hdr)
4963                 goto put_failure;
4964
4965         if (reg_last_request_cell_base() &&
4966             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4967                         NL80211_USER_REG_HINT_CELL_BASE))
4968                 goto nla_put_failure;
4969
4970         rcu_read_lock();
4971         regdom = rcu_dereference(cfg80211_regdomain);
4972
4973         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4974             (regdom->dfs_region &&
4975              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4976                 goto nla_put_failure_rcu;
4977
4978         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4979         if (!nl_reg_rules)
4980                 goto nla_put_failure_rcu;
4981
4982         for (i = 0; i < regdom->n_reg_rules; i++) {
4983                 struct nlattr *nl_reg_rule;
4984                 const struct ieee80211_reg_rule *reg_rule;
4985                 const struct ieee80211_freq_range *freq_range;
4986                 const struct ieee80211_power_rule *power_rule;
4987
4988                 reg_rule = &regdom->reg_rules[i];
4989                 freq_range = &reg_rule->freq_range;
4990                 power_rule = &reg_rule->power_rule;
4991
4992                 nl_reg_rule = nla_nest_start(msg, i);
4993                 if (!nl_reg_rule)
4994                         goto nla_put_failure_rcu;
4995
4996                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4997                                 reg_rule->flags) ||
4998                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4999                                 freq_range->start_freq_khz) ||
5000                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5001                                 freq_range->end_freq_khz) ||
5002                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5003                                 freq_range->max_bandwidth_khz) ||
5004                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5005                                 power_rule->max_antenna_gain) ||
5006                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5007                                 power_rule->max_eirp))
5008                         goto nla_put_failure_rcu;
5009
5010                 nla_nest_end(msg, nl_reg_rule);
5011         }
5012         rcu_read_unlock();
5013
5014         nla_nest_end(msg, nl_reg_rules);
5015
5016         genlmsg_end(msg, hdr);
5017         return genlmsg_reply(msg, info);
5018
5019 nla_put_failure_rcu:
5020         rcu_read_unlock();
5021 nla_put_failure:
5022         genlmsg_cancel(msg, hdr);
5023 put_failure:
5024         nlmsg_free(msg);
5025         return -EMSGSIZE;
5026 }
5027
5028 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5029 {
5030         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5031         struct nlattr *nl_reg_rule;
5032         char *alpha2 = NULL;
5033         int rem_reg_rules = 0, r = 0;
5034         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5035         u8 dfs_region = 0;
5036         struct ieee80211_regdomain *rd = NULL;
5037
5038         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5039                 return -EINVAL;
5040
5041         if (!info->attrs[NL80211_ATTR_REG_RULES])
5042                 return -EINVAL;
5043
5044         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5045
5046         if (info->attrs[NL80211_ATTR_DFS_REGION])
5047                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5048
5049         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5050                             rem_reg_rules) {
5051                 num_rules++;
5052                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5053                         return -EINVAL;
5054         }
5055
5056         size_of_regd = sizeof(struct ieee80211_regdomain) +
5057                        num_rules * sizeof(struct ieee80211_reg_rule);
5058
5059         rd = kzalloc(size_of_regd, GFP_KERNEL);
5060         if (!rd)
5061                 return -ENOMEM;
5062
5063         rd->n_reg_rules = num_rules;
5064         rd->alpha2[0] = alpha2[0];
5065         rd->alpha2[1] = alpha2[1];
5066
5067         /*
5068          * Disable DFS master mode if the DFS region was
5069          * not supported or known on this kernel.
5070          */
5071         if (reg_supported_dfs_region(dfs_region))
5072                 rd->dfs_region = dfs_region;
5073
5074         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5075                             rem_reg_rules) {
5076                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5077                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5078                           reg_rule_policy);
5079                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5080                 if (r)
5081                         goto bad_reg;
5082
5083                 rule_idx++;
5084
5085                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5086                         r = -EINVAL;
5087                         goto bad_reg;
5088                 }
5089         }
5090
5091         r = set_regdom(rd);
5092         /* set_regdom took ownership */
5093         rd = NULL;
5094
5095  bad_reg:
5096         kfree(rd);
5097         return r;
5098 }
5099
5100 static int validate_scan_freqs(struct nlattr *freqs)
5101 {
5102         struct nlattr *attr1, *attr2;
5103         int n_channels = 0, tmp1, tmp2;
5104
5105         nla_for_each_nested(attr1, freqs, tmp1) {
5106                 n_channels++;
5107                 /*
5108                  * Some hardware has a limited channel list for
5109                  * scanning, and it is pretty much nonsensical
5110                  * to scan for a channel twice, so disallow that
5111                  * and don't require drivers to check that the
5112                  * channel list they get isn't longer than what
5113                  * they can scan, as long as they can scan all
5114                  * the channels they registered at once.
5115                  */
5116                 nla_for_each_nested(attr2, freqs, tmp2)
5117                         if (attr1 != attr2 &&
5118                             nla_get_u32(attr1) == nla_get_u32(attr2))
5119                                 return 0;
5120         }
5121
5122         return n_channels;
5123 }
5124
5125 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5126 {
5127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5128         struct wireless_dev *wdev = info->user_ptr[1];
5129         struct cfg80211_scan_request *request;
5130         struct nlattr *attr;
5131         struct wiphy *wiphy;
5132         int err, tmp, n_ssids = 0, n_channels, i;
5133         size_t ie_len;
5134
5135         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5136                 return -EINVAL;
5137
5138         wiphy = &rdev->wiphy;
5139
5140         if (!rdev->ops->scan)
5141                 return -EOPNOTSUPP;
5142
5143         if (rdev->scan_req) {
5144                 err = -EBUSY;
5145                 goto unlock;
5146         }
5147
5148         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5149                 n_channels = validate_scan_freqs(
5150                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5151                 if (!n_channels) {
5152                         err = -EINVAL;
5153                         goto unlock;
5154                 }
5155         } else {
5156                 enum ieee80211_band band;
5157                 n_channels = 0;
5158
5159                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5160                         if (wiphy->bands[band])
5161                                 n_channels += wiphy->bands[band]->n_channels;
5162         }
5163
5164         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5165                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5166                         n_ssids++;
5167
5168         if (n_ssids > wiphy->max_scan_ssids) {
5169                 err = -EINVAL;
5170                 goto unlock;
5171         }
5172
5173         if (info->attrs[NL80211_ATTR_IE])
5174                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5175         else
5176                 ie_len = 0;
5177
5178         if (ie_len > wiphy->max_scan_ie_len) {
5179                 err = -EINVAL;
5180                 goto unlock;
5181         }
5182
5183         request = kzalloc(sizeof(*request)
5184                         + sizeof(*request->ssids) * n_ssids
5185                         + sizeof(*request->channels) * n_channels
5186                         + ie_len, GFP_KERNEL);
5187         if (!request) {
5188                 err = -ENOMEM;
5189                 goto unlock;
5190         }
5191
5192         if (n_ssids)
5193                 request->ssids = (void *)&request->channels[n_channels];
5194         request->n_ssids = n_ssids;
5195         if (ie_len) {
5196                 if (request->ssids)
5197                         request->ie = (void *)(request->ssids + n_ssids);
5198                 else
5199                         request->ie = (void *)(request->channels + n_channels);
5200         }
5201
5202         i = 0;
5203         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5204                 /* user specified, bail out if channel not found */
5205                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5206                         struct ieee80211_channel *chan;
5207
5208                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5209
5210                         if (!chan) {
5211                                 err = -EINVAL;
5212                                 goto out_free;
5213                         }
5214
5215                         /* ignore disabled channels */
5216                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5217                                 continue;
5218
5219                         request->channels[i] = chan;
5220                         i++;
5221                 }
5222         } else {
5223                 enum ieee80211_band band;
5224
5225                 /* all channels */
5226                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5227                         int j;
5228                         if (!wiphy->bands[band])
5229                                 continue;
5230                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5231                                 struct ieee80211_channel *chan;
5232
5233                                 chan = &wiphy->bands[band]->channels[j];
5234
5235                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5236                                         continue;
5237
5238                                 request->channels[i] = chan;
5239                                 i++;
5240                         }
5241                 }
5242         }
5243
5244         if (!i) {
5245                 err = -EINVAL;
5246                 goto out_free;
5247         }
5248
5249         request->n_channels = i;
5250
5251         i = 0;
5252         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5253                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5254                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5255                                 err = -EINVAL;
5256                                 goto out_free;
5257                         }
5258                         request->ssids[i].ssid_len = nla_len(attr);
5259                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5260                         i++;
5261                 }
5262         }
5263
5264         if (info->attrs[NL80211_ATTR_IE]) {
5265                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5266                 memcpy((void *)request->ie,
5267                        nla_data(info->attrs[NL80211_ATTR_IE]),
5268                        request->ie_len);
5269         }
5270
5271         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5272                 if (wiphy->bands[i])
5273                         request->rates[i] =
5274                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5275
5276         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5277                 nla_for_each_nested(attr,
5278                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5279                                     tmp) {
5280                         enum ieee80211_band band = nla_type(attr);
5281
5282                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5283                                 err = -EINVAL;
5284                                 goto out_free;
5285                         }
5286                         err = ieee80211_get_ratemask(wiphy->bands[band],
5287                                                      nla_data(attr),
5288                                                      nla_len(attr),
5289                                                      &request->rates[band]);
5290                         if (err)
5291                                 goto out_free;
5292                 }
5293         }
5294
5295         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5296                 request->flags = nla_get_u32(
5297                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5298                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5299                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5300                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5301                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5302                         err = -EOPNOTSUPP;
5303                         goto out_free;
5304                 }
5305         }
5306
5307         request->no_cck =
5308                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5309
5310         request->wdev = wdev;
5311         request->wiphy = &rdev->wiphy;
5312         request->scan_start = jiffies;
5313
5314         rdev->scan_req = request;
5315         err = rdev_scan(rdev, request);
5316
5317         if (!err) {
5318                 nl80211_send_scan_start(rdev, wdev);
5319                 if (wdev->netdev)
5320                         dev_hold(wdev->netdev);
5321         } else {
5322  out_free:
5323                 rdev->scan_req = NULL;
5324                 kfree(request);
5325         }
5326
5327  unlock:
5328         return err;
5329 }
5330
5331 static int nl80211_start_sched_scan(struct sk_buff *skb,
5332                                     struct genl_info *info)
5333 {
5334         struct cfg80211_sched_scan_request *request;
5335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5336         struct net_device *dev = info->user_ptr[1];
5337         struct nlattr *attr;
5338         struct wiphy *wiphy;
5339         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5340         u32 interval;
5341         enum ieee80211_band band;
5342         size_t ie_len;
5343         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5344
5345         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5346             !rdev->ops->sched_scan_start)
5347                 return -EOPNOTSUPP;
5348
5349         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5350                 return -EINVAL;
5351
5352         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5353                 return -EINVAL;
5354
5355         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5356         if (interval == 0)
5357                 return -EINVAL;
5358
5359         wiphy = &rdev->wiphy;
5360
5361         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5362                 n_channels = validate_scan_freqs(
5363                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5364                 if (!n_channels)
5365                         return -EINVAL;
5366         } else {
5367                 n_channels = 0;
5368
5369                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5370                         if (wiphy->bands[band])
5371                                 n_channels += wiphy->bands[band]->n_channels;
5372         }
5373
5374         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5375                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5376                                     tmp)
5377                         n_ssids++;
5378
5379         if (n_ssids > wiphy->max_sched_scan_ssids)
5380                 return -EINVAL;
5381
5382         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5383                 nla_for_each_nested(attr,
5384                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5385                                     tmp)
5386                         n_match_sets++;
5387
5388         if (n_match_sets > wiphy->max_match_sets)
5389                 return -EINVAL;
5390
5391         if (info->attrs[NL80211_ATTR_IE])
5392                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5393         else
5394                 ie_len = 0;
5395
5396         if (ie_len > wiphy->max_sched_scan_ie_len)
5397                 return -EINVAL;
5398
5399         if (rdev->sched_scan_req) {
5400                 err = -EINPROGRESS;
5401                 goto out;
5402         }
5403
5404         request = kzalloc(sizeof(*request)
5405                         + sizeof(*request->ssids) * n_ssids
5406                         + sizeof(*request->match_sets) * n_match_sets
5407                         + sizeof(*request->channels) * n_channels
5408                         + ie_len, GFP_KERNEL);
5409         if (!request) {
5410                 err = -ENOMEM;
5411                 goto out;
5412         }
5413
5414         if (n_ssids)
5415                 request->ssids = (void *)&request->channels[n_channels];
5416         request->n_ssids = n_ssids;
5417         if (ie_len) {
5418                 if (request->ssids)
5419                         request->ie = (void *)(request->ssids + n_ssids);
5420                 else
5421                         request->ie = (void *)(request->channels + n_channels);
5422         }
5423
5424         if (n_match_sets) {
5425                 if (request->ie)
5426                         request->match_sets = (void *)(request->ie + ie_len);
5427                 else if (request->ssids)
5428                         request->match_sets =
5429                                 (void *)(request->ssids + n_ssids);
5430                 else
5431                         request->match_sets =
5432                                 (void *)(request->channels + n_channels);
5433         }
5434         request->n_match_sets = n_match_sets;
5435
5436         i = 0;
5437         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5438                 /* user specified, bail out if channel not found */
5439                 nla_for_each_nested(attr,
5440                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5441                                     tmp) {
5442                         struct ieee80211_channel *chan;
5443
5444                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5445
5446                         if (!chan) {
5447                                 err = -EINVAL;
5448                                 goto out_free;
5449                         }
5450
5451                         /* ignore disabled channels */
5452                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5453                                 continue;
5454
5455                         request->channels[i] = chan;
5456                         i++;
5457                 }
5458         } else {
5459                 /* all channels */
5460                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5461                         int j;
5462                         if (!wiphy->bands[band])
5463                                 continue;
5464                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5465                                 struct ieee80211_channel *chan;
5466
5467                                 chan = &wiphy->bands[band]->channels[j];
5468
5469                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5470                                         continue;
5471
5472                                 request->channels[i] = chan;
5473                                 i++;
5474                         }
5475                 }
5476         }
5477
5478         if (!i) {
5479                 err = -EINVAL;
5480                 goto out_free;
5481         }
5482
5483         request->n_channels = i;
5484
5485         i = 0;
5486         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5487                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5488                                     tmp) {
5489                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5490                                 err = -EINVAL;
5491                                 goto out_free;
5492                         }
5493                         request->ssids[i].ssid_len = nla_len(attr);
5494                         memcpy(request->ssids[i].ssid, nla_data(attr),
5495                                nla_len(attr));
5496                         i++;
5497                 }
5498         }
5499
5500         i = 0;
5501         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5502                 nla_for_each_nested(attr,
5503                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5504                                     tmp) {
5505                         struct nlattr *ssid, *rssi;
5506
5507                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5508                                   nla_data(attr), nla_len(attr),
5509                                   nl80211_match_policy);
5510                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5511                         if (ssid) {
5512                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5513                                         err = -EINVAL;
5514                                         goto out_free;
5515                                 }
5516                                 memcpy(request->match_sets[i].ssid.ssid,
5517                                        nla_data(ssid), nla_len(ssid));
5518                                 request->match_sets[i].ssid.ssid_len =
5519                                         nla_len(ssid);
5520                         }
5521                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5522                         if (rssi)
5523                                 request->rssi_thold = nla_get_u32(rssi);
5524                         else
5525                                 request->rssi_thold =
5526                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5527                         i++;
5528                 }
5529         }
5530
5531         if (info->attrs[NL80211_ATTR_IE]) {
5532                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5533                 memcpy((void *)request->ie,
5534                        nla_data(info->attrs[NL80211_ATTR_IE]),
5535                        request->ie_len);
5536         }
5537
5538         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5539                 request->flags = nla_get_u32(
5540                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5541                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5542                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5543                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5544                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5545                         err = -EOPNOTSUPP;
5546                         goto out_free;
5547                 }
5548         }
5549
5550         request->dev = dev;
5551         request->wiphy = &rdev->wiphy;
5552         request->interval = interval;
5553         request->scan_start = jiffies;
5554
5555         err = rdev_sched_scan_start(rdev, dev, request);
5556         if (!err) {
5557                 rdev->sched_scan_req = request;
5558                 nl80211_send_sched_scan(rdev, dev,
5559                                         NL80211_CMD_START_SCHED_SCAN);
5560                 goto out;
5561         }
5562
5563 out_free:
5564         kfree(request);
5565 out:
5566         return err;
5567 }
5568
5569 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5570                                    struct genl_info *info)
5571 {
5572         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5573
5574         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5575             !rdev->ops->sched_scan_stop)
5576                 return -EOPNOTSUPP;
5577
5578         return __cfg80211_stop_sched_scan(rdev, false);
5579 }
5580
5581 static int nl80211_start_radar_detection(struct sk_buff *skb,
5582                                          struct genl_info *info)
5583 {
5584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5585         struct net_device *dev = info->user_ptr[1];
5586         struct wireless_dev *wdev = dev->ieee80211_ptr;
5587         struct cfg80211_chan_def chandef;
5588         int err;
5589
5590         err = nl80211_parse_chandef(rdev, info, &chandef);
5591         if (err)
5592                 return err;
5593
5594         if (netif_carrier_ok(dev))
5595                 return -EBUSY;
5596
5597         if (wdev->cac_started)
5598                 return -EBUSY;
5599
5600         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5601         if (err < 0)
5602                 return err;
5603
5604         if (err == 0)
5605                 return -EINVAL;
5606
5607         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5608                 return -EINVAL;
5609
5610         if (!rdev->ops->start_radar_detection)
5611                 return -EOPNOTSUPP;
5612
5613         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5614                                            chandef.chan, CHAN_MODE_SHARED,
5615                                            BIT(chandef.width));
5616         if (err)
5617                 return err;
5618
5619         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5620         if (!err) {
5621                 wdev->channel = chandef.chan;
5622                 wdev->cac_started = true;
5623                 wdev->cac_start_time = jiffies;
5624         }
5625         return err;
5626 }
5627
5628 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5629 {
5630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5631         struct net_device *dev = info->user_ptr[1];
5632         struct wireless_dev *wdev = dev->ieee80211_ptr;
5633         struct cfg80211_csa_settings params;
5634         /* csa_attrs is defined static to avoid waste of stack size - this
5635          * function is called under RTNL lock, so this should not be a problem.
5636          */
5637         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5638         u8 radar_detect_width = 0;
5639         int err;
5640         bool need_new_beacon = false;
5641
5642         if (!rdev->ops->channel_switch ||
5643             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5644                 return -EOPNOTSUPP;
5645
5646         switch (dev->ieee80211_ptr->iftype) {
5647         case NL80211_IFTYPE_AP:
5648         case NL80211_IFTYPE_P2P_GO:
5649                 need_new_beacon = true;
5650
5651                 /* useless if AP is not running */
5652                 if (!wdev->beacon_interval)
5653                         return -EINVAL;
5654                 break;
5655         case NL80211_IFTYPE_ADHOC:
5656                 break;
5657         default:
5658                 return -EOPNOTSUPP;
5659         }
5660
5661         memset(&params, 0, sizeof(params));
5662
5663         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5664             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5665                 return -EINVAL;
5666
5667         /* only important for AP, IBSS and mesh create IEs internally */
5668         if (need_new_beacon &&
5669             (!info->attrs[NL80211_ATTR_CSA_IES] ||
5670              !info->attrs[NL80211_ATTR_CSA_C_OFF_BEACON]))
5671                 return -EINVAL;
5672
5673         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5674
5675         if (!need_new_beacon)
5676                 goto skip_beacons;
5677
5678         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5679         if (err)
5680                 return err;
5681
5682         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5683                                info->attrs[NL80211_ATTR_CSA_IES],
5684                                nl80211_policy);
5685         if (err)
5686                 return err;
5687
5688         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5689         if (err)
5690                 return err;
5691
5692         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5693                 return -EINVAL;
5694
5695         params.counter_offset_beacon =
5696                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5697         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5698                 return -EINVAL;
5699
5700         /* sanity check - counters should be the same */
5701         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5702             params.count)
5703                 return -EINVAL;
5704
5705         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5706                 params.counter_offset_presp =
5707                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5708                 if (params.counter_offset_presp >=
5709                     params.beacon_csa.probe_resp_len)
5710                         return -EINVAL;
5711
5712                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5713                     params.count)
5714                         return -EINVAL;
5715         }
5716
5717 skip_beacons:
5718         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5719         if (err)
5720                 return err;
5721
5722         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5723                 return -EINVAL;
5724
5725         /* DFS channels are only supported for AP/P2P GO ... for now. */
5726         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5727             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) {
5728                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5729                                                     &params.chandef);
5730                 if (err < 0) {
5731                         return err;
5732                 } else if (err) {
5733                         radar_detect_width = BIT(params.chandef.width);
5734                         params.radar_required = true;
5735                 }
5736         }
5737
5738         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5739                                            params.chandef.chan,
5740                                            CHAN_MODE_SHARED,
5741                                            radar_detect_width);
5742         if (err)
5743                 return err;
5744
5745         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5746                 params.block_tx = true;
5747
5748         return rdev_channel_switch(rdev, dev, &params);
5749 }
5750
5751 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5752                             u32 seq, int flags,
5753                             struct cfg80211_registered_device *rdev,
5754                             struct wireless_dev *wdev,
5755                             struct cfg80211_internal_bss *intbss)
5756 {
5757         struct cfg80211_bss *res = &intbss->pub;
5758         const struct cfg80211_bss_ies *ies;
5759         void *hdr;
5760         struct nlattr *bss;
5761         bool tsf = false;
5762
5763         ASSERT_WDEV_LOCK(wdev);
5764
5765         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5766                              NL80211_CMD_NEW_SCAN_RESULTS);
5767         if (!hdr)
5768                 return -1;
5769
5770         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5771
5772         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5773                 goto nla_put_failure;
5774         if (wdev->netdev &&
5775             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5776                 goto nla_put_failure;
5777         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5778                 goto nla_put_failure;
5779
5780         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5781         if (!bss)
5782                 goto nla_put_failure;
5783         if ((!is_zero_ether_addr(res->bssid) &&
5784              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5785                 goto nla_put_failure;
5786
5787         rcu_read_lock();
5788         ies = rcu_dereference(res->ies);
5789         if (ies) {
5790                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5791                         goto fail_unlock_rcu;
5792                 tsf = true;
5793                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5794                                         ies->len, ies->data))
5795                         goto fail_unlock_rcu;
5796         }
5797         ies = rcu_dereference(res->beacon_ies);
5798         if (ies) {
5799                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5800                         goto fail_unlock_rcu;
5801                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5802                                         ies->len, ies->data))
5803                         goto fail_unlock_rcu;
5804         }
5805         rcu_read_unlock();
5806
5807         if (res->beacon_interval &&
5808             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5809                 goto nla_put_failure;
5810         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5811             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5812             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5813             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5814                         jiffies_to_msecs(jiffies - intbss->ts)))
5815                 goto nla_put_failure;
5816
5817         switch (rdev->wiphy.signal_type) {
5818         case CFG80211_SIGNAL_TYPE_MBM:
5819                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5820                         goto nla_put_failure;
5821                 break;
5822         case CFG80211_SIGNAL_TYPE_UNSPEC:
5823                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5824                         goto nla_put_failure;
5825                 break;
5826         default:
5827                 break;
5828         }
5829
5830         switch (wdev->iftype) {
5831         case NL80211_IFTYPE_P2P_CLIENT:
5832         case NL80211_IFTYPE_STATION:
5833                 if (intbss == wdev->current_bss &&
5834                     nla_put_u32(msg, NL80211_BSS_STATUS,
5835                                 NL80211_BSS_STATUS_ASSOCIATED))
5836                         goto nla_put_failure;
5837                 break;
5838         case NL80211_IFTYPE_ADHOC:
5839                 if (intbss == wdev->current_bss &&
5840                     nla_put_u32(msg, NL80211_BSS_STATUS,
5841                                 NL80211_BSS_STATUS_IBSS_JOINED))
5842                         goto nla_put_failure;
5843                 break;
5844         default:
5845                 break;
5846         }
5847
5848         nla_nest_end(msg, bss);
5849
5850         return genlmsg_end(msg, hdr);
5851
5852  fail_unlock_rcu:
5853         rcu_read_unlock();
5854  nla_put_failure:
5855         genlmsg_cancel(msg, hdr);
5856         return -EMSGSIZE;
5857 }
5858
5859 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5860 {
5861         struct cfg80211_registered_device *rdev;
5862         struct cfg80211_internal_bss *scan;
5863         struct wireless_dev *wdev;
5864         int start = cb->args[2], idx = 0;
5865         int err;
5866
5867         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5868         if (err)
5869                 return err;
5870
5871         wdev_lock(wdev);
5872         spin_lock_bh(&rdev->bss_lock);
5873         cfg80211_bss_expire(rdev);
5874
5875         cb->seq = rdev->bss_generation;
5876
5877         list_for_each_entry(scan, &rdev->bss_list, list) {
5878                 if (++idx <= start)
5879                         continue;
5880                 if (nl80211_send_bss(skb, cb,
5881                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5882                                 rdev, wdev, scan) < 0) {
5883                         idx--;
5884                         break;
5885                 }
5886         }
5887
5888         spin_unlock_bh(&rdev->bss_lock);
5889         wdev_unlock(wdev);
5890
5891         cb->args[2] = idx;
5892         nl80211_finish_wdev_dump(rdev);
5893
5894         return skb->len;
5895 }
5896
5897 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5898                                 int flags, struct net_device *dev,
5899                                 struct survey_info *survey)
5900 {
5901         void *hdr;
5902         struct nlattr *infoattr;
5903
5904         hdr = nl80211hdr_put(msg, portid, seq, flags,
5905                              NL80211_CMD_NEW_SURVEY_RESULTS);
5906         if (!hdr)
5907                 return -ENOMEM;
5908
5909         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5910                 goto nla_put_failure;
5911
5912         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5913         if (!infoattr)
5914                 goto nla_put_failure;
5915
5916         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5917                         survey->channel->center_freq))
5918                 goto nla_put_failure;
5919
5920         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5921             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5922                 goto nla_put_failure;
5923         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5924             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5925                 goto nla_put_failure;
5926         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5927             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5928                         survey->channel_time))
5929                 goto nla_put_failure;
5930         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5931             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5932                         survey->channel_time_busy))
5933                 goto nla_put_failure;
5934         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5935             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5936                         survey->channel_time_ext_busy))
5937                 goto nla_put_failure;
5938         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5939             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5940                         survey->channel_time_rx))
5941                 goto nla_put_failure;
5942         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5943             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5944                         survey->channel_time_tx))
5945                 goto nla_put_failure;
5946
5947         nla_nest_end(msg, infoattr);
5948
5949         return genlmsg_end(msg, hdr);
5950
5951  nla_put_failure:
5952         genlmsg_cancel(msg, hdr);
5953         return -EMSGSIZE;
5954 }
5955
5956 static int nl80211_dump_survey(struct sk_buff *skb,
5957                         struct netlink_callback *cb)
5958 {
5959         struct survey_info survey;
5960         struct cfg80211_registered_device *dev;
5961         struct wireless_dev *wdev;
5962         int survey_idx = cb->args[2];
5963         int res;
5964
5965         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5966         if (res)
5967                 return res;
5968
5969         if (!wdev->netdev) {
5970                 res = -EINVAL;
5971                 goto out_err;
5972         }
5973
5974         if (!dev->ops->dump_survey) {
5975                 res = -EOPNOTSUPP;
5976                 goto out_err;
5977         }
5978
5979         while (1) {
5980                 struct ieee80211_channel *chan;
5981
5982                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5983                 if (res == -ENOENT)
5984                         break;
5985                 if (res)
5986                         goto out_err;
5987
5988                 /* Survey without a channel doesn't make sense */
5989                 if (!survey.channel) {
5990                         res = -EINVAL;
5991                         goto out;
5992                 }
5993
5994                 chan = ieee80211_get_channel(&dev->wiphy,
5995                                              survey.channel->center_freq);
5996                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5997                         survey_idx++;
5998                         continue;
5999                 }
6000
6001                 if (nl80211_send_survey(skb,
6002                                 NETLINK_CB(cb->skb).portid,
6003                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6004                                 wdev->netdev, &survey) < 0)
6005                         goto out;
6006                 survey_idx++;
6007         }
6008
6009  out:
6010         cb->args[2] = survey_idx;
6011         res = skb->len;
6012  out_err:
6013         nl80211_finish_wdev_dump(dev);
6014         return res;
6015 }
6016
6017 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6018 {
6019         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6020                                   NL80211_WPA_VERSION_2));
6021 }
6022
6023 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6024 {
6025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6026         struct net_device *dev = info->user_ptr[1];
6027         struct ieee80211_channel *chan;
6028         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6029         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6030         enum nl80211_auth_type auth_type;
6031         struct key_parse key;
6032         bool local_state_change;
6033
6034         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6035                 return -EINVAL;
6036
6037         if (!info->attrs[NL80211_ATTR_MAC])
6038                 return -EINVAL;
6039
6040         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6041                 return -EINVAL;
6042
6043         if (!info->attrs[NL80211_ATTR_SSID])
6044                 return -EINVAL;
6045
6046         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6047                 return -EINVAL;
6048
6049         err = nl80211_parse_key(info, &key);
6050         if (err)
6051                 return err;
6052
6053         if (key.idx >= 0) {
6054                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6055                         return -EINVAL;
6056                 if (!key.p.key || !key.p.key_len)
6057                         return -EINVAL;
6058                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6059                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6060                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6061                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6062                         return -EINVAL;
6063                 if (key.idx > 4)
6064                         return -EINVAL;
6065         } else {
6066                 key.p.key_len = 0;
6067                 key.p.key = NULL;
6068         }
6069
6070         if (key.idx >= 0) {
6071                 int i;
6072                 bool ok = false;
6073                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6074                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6075                                 ok = true;
6076                                 break;
6077                         }
6078                 }
6079                 if (!ok)
6080                         return -EINVAL;
6081         }
6082
6083         if (!rdev->ops->auth)
6084                 return -EOPNOTSUPP;
6085
6086         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6087             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6088                 return -EOPNOTSUPP;
6089
6090         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6091         chan = ieee80211_get_channel(&rdev->wiphy,
6092                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6093         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6094                 return -EINVAL;
6095
6096         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6097         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6098
6099         if (info->attrs[NL80211_ATTR_IE]) {
6100                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6101                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6102         }
6103
6104         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6105         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6106                 return -EINVAL;
6107
6108         if (auth_type == NL80211_AUTHTYPE_SAE &&
6109             !info->attrs[NL80211_ATTR_SAE_DATA])
6110                 return -EINVAL;
6111
6112         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6113                 if (auth_type != NL80211_AUTHTYPE_SAE)
6114                         return -EINVAL;
6115                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6116                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6117                 /* need to include at least Auth Transaction and Status Code */
6118                 if (sae_data_len < 4)
6119                         return -EINVAL;
6120         }
6121
6122         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6123
6124         /*
6125          * Since we no longer track auth state, ignore
6126          * requests to only change local state.
6127          */
6128         if (local_state_change)
6129                 return 0;
6130
6131         wdev_lock(dev->ieee80211_ptr);
6132         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6133                                  ssid, ssid_len, ie, ie_len,
6134                                  key.p.key, key.p.key_len, key.idx,
6135                                  sae_data, sae_data_len);
6136         wdev_unlock(dev->ieee80211_ptr);
6137         return err;
6138 }
6139
6140 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6141                                    struct genl_info *info,
6142                                    struct cfg80211_crypto_settings *settings,
6143                                    int cipher_limit)
6144 {
6145         memset(settings, 0, sizeof(*settings));
6146
6147         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6148
6149         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6150                 u16 proto;
6151                 proto = nla_get_u16(
6152                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6153                 settings->control_port_ethertype = cpu_to_be16(proto);
6154                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6155                     proto != ETH_P_PAE)
6156                         return -EINVAL;
6157                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6158                         settings->control_port_no_encrypt = true;
6159         } else
6160                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6161
6162         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6163                 void *data;
6164                 int len, i;
6165
6166                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6167                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6168                 settings->n_ciphers_pairwise = len / sizeof(u32);
6169
6170                 if (len % sizeof(u32))
6171                         return -EINVAL;
6172
6173                 if (settings->n_ciphers_pairwise > cipher_limit)
6174                         return -EINVAL;
6175
6176                 memcpy(settings->ciphers_pairwise, data, len);
6177
6178                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6179                         if (!cfg80211_supported_cipher_suite(
6180                                         &rdev->wiphy,
6181                                         settings->ciphers_pairwise[i]))
6182                                 return -EINVAL;
6183         }
6184
6185         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6186                 settings->cipher_group =
6187                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6188                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6189                                                      settings->cipher_group))
6190                         return -EINVAL;
6191         }
6192
6193         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6194                 settings->wpa_versions =
6195                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6196                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6197                         return -EINVAL;
6198         }
6199
6200         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6201                 void *data;
6202                 int len;
6203
6204                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6205                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6206                 settings->n_akm_suites = len / sizeof(u32);
6207
6208                 if (len % sizeof(u32))
6209                         return -EINVAL;
6210
6211                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6212                         return -EINVAL;
6213
6214                 memcpy(settings->akm_suites, data, len);
6215         }
6216
6217         return 0;
6218 }
6219
6220 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6221 {
6222         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6223         struct net_device *dev = info->user_ptr[1];
6224         struct ieee80211_channel *chan;
6225         struct cfg80211_assoc_request req = {};
6226         const u8 *bssid, *ssid;
6227         int err, ssid_len = 0;
6228
6229         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6230                 return -EINVAL;
6231
6232         if (!info->attrs[NL80211_ATTR_MAC] ||
6233             !info->attrs[NL80211_ATTR_SSID] ||
6234             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6235                 return -EINVAL;
6236
6237         if (!rdev->ops->assoc)
6238                 return -EOPNOTSUPP;
6239
6240         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6241             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6242                 return -EOPNOTSUPP;
6243
6244         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6245
6246         chan = ieee80211_get_channel(&rdev->wiphy,
6247                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6248         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6249                 return -EINVAL;
6250
6251         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6252         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6253
6254         if (info->attrs[NL80211_ATTR_IE]) {
6255                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6256                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6257         }
6258
6259         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6260                 enum nl80211_mfp mfp =
6261                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6262                 if (mfp == NL80211_MFP_REQUIRED)
6263                         req.use_mfp = true;
6264                 else if (mfp != NL80211_MFP_NO)
6265                         return -EINVAL;
6266         }
6267
6268         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6269                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6270
6271         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6272                 req.flags |= ASSOC_REQ_DISABLE_HT;
6273
6274         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6275                 memcpy(&req.ht_capa_mask,
6276                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6277                        sizeof(req.ht_capa_mask));
6278
6279         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6280                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6281                         return -EINVAL;
6282                 memcpy(&req.ht_capa,
6283                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6284                        sizeof(req.ht_capa));
6285         }
6286
6287         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6288                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6289
6290         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6291                 memcpy(&req.vht_capa_mask,
6292                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6293                        sizeof(req.vht_capa_mask));
6294
6295         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6296                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6297                         return -EINVAL;
6298                 memcpy(&req.vht_capa,
6299                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6300                        sizeof(req.vht_capa));
6301         }
6302
6303         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6304         if (!err) {
6305                 wdev_lock(dev->ieee80211_ptr);
6306                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6307                                           ssid, ssid_len, &req);
6308                 wdev_unlock(dev->ieee80211_ptr);
6309         }
6310
6311         return err;
6312 }
6313
6314 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6315 {
6316         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6317         struct net_device *dev = info->user_ptr[1];
6318         const u8 *ie = NULL, *bssid;
6319         int ie_len = 0, err;
6320         u16 reason_code;
6321         bool local_state_change;
6322
6323         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6324                 return -EINVAL;
6325
6326         if (!info->attrs[NL80211_ATTR_MAC])
6327                 return -EINVAL;
6328
6329         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6330                 return -EINVAL;
6331
6332         if (!rdev->ops->deauth)
6333                 return -EOPNOTSUPP;
6334
6335         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6336             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6337                 return -EOPNOTSUPP;
6338
6339         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6340
6341         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6342         if (reason_code == 0) {
6343                 /* Reason Code 0 is reserved */
6344                 return -EINVAL;
6345         }
6346
6347         if (info->attrs[NL80211_ATTR_IE]) {
6348                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6349                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6350         }
6351
6352         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6353
6354         wdev_lock(dev->ieee80211_ptr);
6355         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6356                                    local_state_change);
6357         wdev_unlock(dev->ieee80211_ptr);
6358         return err;
6359 }
6360
6361 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6362 {
6363         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6364         struct net_device *dev = info->user_ptr[1];
6365         const u8 *ie = NULL, *bssid;
6366         int ie_len = 0, err;
6367         u16 reason_code;
6368         bool local_state_change;
6369
6370         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6371                 return -EINVAL;
6372
6373         if (!info->attrs[NL80211_ATTR_MAC])
6374                 return -EINVAL;
6375
6376         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6377                 return -EINVAL;
6378
6379         if (!rdev->ops->disassoc)
6380                 return -EOPNOTSUPP;
6381
6382         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6383             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6384                 return -EOPNOTSUPP;
6385
6386         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6387
6388         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6389         if (reason_code == 0) {
6390                 /* Reason Code 0 is reserved */
6391                 return -EINVAL;
6392         }
6393
6394         if (info->attrs[NL80211_ATTR_IE]) {
6395                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6396                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6397         }
6398
6399         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6400
6401         wdev_lock(dev->ieee80211_ptr);
6402         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6403                                      local_state_change);
6404         wdev_unlock(dev->ieee80211_ptr);
6405         return err;
6406 }
6407
6408 static bool
6409 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6410                          int mcast_rate[IEEE80211_NUM_BANDS],
6411                          int rateval)
6412 {
6413         struct wiphy *wiphy = &rdev->wiphy;
6414         bool found = false;
6415         int band, i;
6416
6417         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6418                 struct ieee80211_supported_band *sband;
6419
6420                 sband = wiphy->bands[band];
6421                 if (!sband)
6422                         continue;
6423
6424                 for (i = 0; i < sband->n_bitrates; i++) {
6425                         if (sband->bitrates[i].bitrate == rateval) {
6426                                 mcast_rate[band] = i + 1;
6427                                 found = true;
6428                                 break;
6429                         }
6430                 }
6431         }
6432
6433         return found;
6434 }
6435
6436 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6437 {
6438         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6439         struct net_device *dev = info->user_ptr[1];
6440         struct cfg80211_ibss_params ibss;
6441         struct wiphy *wiphy;
6442         struct cfg80211_cached_keys *connkeys = NULL;
6443         int err;
6444
6445         memset(&ibss, 0, sizeof(ibss));
6446
6447         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6448                 return -EINVAL;
6449
6450         if (!info->attrs[NL80211_ATTR_SSID] ||
6451             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6452                 return -EINVAL;
6453
6454         ibss.beacon_interval = 100;
6455
6456         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6457                 ibss.beacon_interval =
6458                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6459                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6460                         return -EINVAL;
6461         }
6462
6463         if (!rdev->ops->join_ibss)
6464                 return -EOPNOTSUPP;
6465
6466         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6467                 return -EOPNOTSUPP;
6468
6469         wiphy = &rdev->wiphy;
6470
6471         if (info->attrs[NL80211_ATTR_MAC]) {
6472                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6473
6474                 if (!is_valid_ether_addr(ibss.bssid))
6475                         return -EINVAL;
6476         }
6477         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6478         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6479
6480         if (info->attrs[NL80211_ATTR_IE]) {
6481                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6482                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6483         }
6484
6485         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6486         if (err)
6487                 return err;
6488
6489         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6490                 return -EINVAL;
6491
6492         switch (ibss.chandef.width) {
6493         case NL80211_CHAN_WIDTH_5:
6494         case NL80211_CHAN_WIDTH_10:
6495         case NL80211_CHAN_WIDTH_20_NOHT:
6496                 break;
6497         case NL80211_CHAN_WIDTH_20:
6498         case NL80211_CHAN_WIDTH_40:
6499                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6500                         break;
6501         default:
6502                 return -EINVAL;
6503         }
6504
6505         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6506         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6507
6508         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6509                 u8 *rates =
6510                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6511                 int n_rates =
6512                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6513                 struct ieee80211_supported_band *sband =
6514                         wiphy->bands[ibss.chandef.chan->band];
6515
6516                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6517                                              &ibss.basic_rates);
6518                 if (err)
6519                         return err;
6520         }
6521
6522         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6523                 memcpy(&ibss.ht_capa_mask,
6524                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6525                        sizeof(ibss.ht_capa_mask));
6526
6527         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6528                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6529                         return -EINVAL;
6530                 memcpy(&ibss.ht_capa,
6531                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6532                        sizeof(ibss.ht_capa));
6533         }
6534
6535         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6536             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6537                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6538                 return -EINVAL;
6539
6540         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6541                 bool no_ht = false;
6542
6543                 connkeys = nl80211_parse_connkeys(rdev,
6544                                           info->attrs[NL80211_ATTR_KEYS],
6545                                           &no_ht);
6546                 if (IS_ERR(connkeys))
6547                         return PTR_ERR(connkeys);
6548
6549                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6550                     no_ht) {
6551                         kfree(connkeys);
6552                         return -EINVAL;
6553                 }
6554         }
6555
6556         ibss.control_port =
6557                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6558
6559         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6560         if (err)
6561                 kfree(connkeys);
6562         return err;
6563 }
6564
6565 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6566 {
6567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6568         struct net_device *dev = info->user_ptr[1];
6569
6570         if (!rdev->ops->leave_ibss)
6571                 return -EOPNOTSUPP;
6572
6573         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6574                 return -EOPNOTSUPP;
6575
6576         return cfg80211_leave_ibss(rdev, dev, false);
6577 }
6578
6579 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6580 {
6581         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6582         struct net_device *dev = info->user_ptr[1];
6583         int mcast_rate[IEEE80211_NUM_BANDS];
6584         u32 nla_rate;
6585         int err;
6586
6587         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6588             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6589                 return -EOPNOTSUPP;
6590
6591         if (!rdev->ops->set_mcast_rate)
6592                 return -EOPNOTSUPP;
6593
6594         memset(mcast_rate, 0, sizeof(mcast_rate));
6595
6596         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6597                 return -EINVAL;
6598
6599         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6600         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6601                 return -EINVAL;
6602
6603         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6604
6605         return err;
6606 }
6607
6608
6609 #ifdef CONFIG_NL80211_TESTMODE
6610 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6611         .name = "testmode",
6612 };
6613
6614 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6615 {
6616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6617         struct wireless_dev *wdev =
6618                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6619         int err;
6620
6621         if (!rdev->ops->testmode_cmd)
6622                 return -EOPNOTSUPP;
6623
6624         if (IS_ERR(wdev)) {
6625                 err = PTR_ERR(wdev);
6626                 if (err != -EINVAL)
6627                         return err;
6628                 wdev = NULL;
6629         } else if (wdev->wiphy != &rdev->wiphy) {
6630                 return -EINVAL;
6631         }
6632
6633         if (!info->attrs[NL80211_ATTR_TESTDATA])
6634                 return -EINVAL;
6635
6636         rdev->testmode_info = info;
6637         err = rdev_testmode_cmd(rdev, wdev,
6638                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6639                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6640         rdev->testmode_info = NULL;
6641
6642         return err;
6643 }
6644
6645 static int nl80211_testmode_dump(struct sk_buff *skb,
6646                                  struct netlink_callback *cb)
6647 {
6648         struct cfg80211_registered_device *rdev;
6649         int err;
6650         long phy_idx;
6651         void *data = NULL;
6652         int data_len = 0;
6653
6654         rtnl_lock();
6655
6656         if (cb->args[0]) {
6657                 /*
6658                  * 0 is a valid index, but not valid for args[0],
6659                  * so we need to offset by 1.
6660                  */
6661                 phy_idx = cb->args[0] - 1;
6662         } else {
6663                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6664                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6665                                   nl80211_policy);
6666                 if (err)
6667                         goto out_err;
6668
6669                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6670                                                   nl80211_fam.attrbuf);
6671                 if (IS_ERR(rdev)) {
6672                         err = PTR_ERR(rdev);
6673                         goto out_err;
6674                 }
6675                 phy_idx = rdev->wiphy_idx;
6676                 rdev = NULL;
6677
6678                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6679                         cb->args[1] =
6680                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6681         }
6682
6683         if (cb->args[1]) {
6684                 data = nla_data((void *)cb->args[1]);
6685                 data_len = nla_len((void *)cb->args[1]);
6686         }
6687
6688         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6689         if (!rdev) {
6690                 err = -ENOENT;
6691                 goto out_err;
6692         }
6693
6694         if (!rdev->ops->testmode_dump) {
6695                 err = -EOPNOTSUPP;
6696                 goto out_err;
6697         }
6698
6699         while (1) {
6700                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6701                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6702                                            NL80211_CMD_TESTMODE);
6703                 struct nlattr *tmdata;
6704
6705                 if (!hdr)
6706                         break;
6707
6708                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6709                         genlmsg_cancel(skb, hdr);
6710                         break;
6711                 }
6712
6713                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6714                 if (!tmdata) {
6715                         genlmsg_cancel(skb, hdr);
6716                         break;
6717                 }
6718                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6719                 nla_nest_end(skb, tmdata);
6720
6721                 if (err == -ENOBUFS || err == -ENOENT) {
6722                         genlmsg_cancel(skb, hdr);
6723                         break;
6724                 } else if (err) {
6725                         genlmsg_cancel(skb, hdr);
6726                         goto out_err;
6727                 }
6728
6729                 genlmsg_end(skb, hdr);
6730         }
6731
6732         err = skb->len;
6733         /* see above */
6734         cb->args[0] = phy_idx + 1;
6735  out_err:
6736         rtnl_unlock();
6737         return err;
6738 }
6739
6740 static struct sk_buff *
6741 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6742                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6743 {
6744         struct sk_buff *skb;
6745         void *hdr;
6746         struct nlattr *data;
6747
6748         skb = nlmsg_new(approxlen + 100, gfp);
6749         if (!skb)
6750                 return NULL;
6751
6752         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6753         if (!hdr) {
6754                 kfree_skb(skb);
6755                 return NULL;
6756         }
6757
6758         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6759                 goto nla_put_failure;
6760         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6761
6762         ((void **)skb->cb)[0] = rdev;
6763         ((void **)skb->cb)[1] = hdr;
6764         ((void **)skb->cb)[2] = data;
6765
6766         return skb;
6767
6768  nla_put_failure:
6769         kfree_skb(skb);
6770         return NULL;
6771 }
6772
6773 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6774                                                   int approxlen)
6775 {
6776         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6777
6778         if (WARN_ON(!rdev->testmode_info))
6779                 return NULL;
6780
6781         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6782                                 rdev->testmode_info->snd_portid,
6783                                 rdev->testmode_info->snd_seq,
6784                                 GFP_KERNEL);
6785 }
6786 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6787
6788 int cfg80211_testmode_reply(struct sk_buff *skb)
6789 {
6790         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6791         void *hdr = ((void **)skb->cb)[1];
6792         struct nlattr *data = ((void **)skb->cb)[2];
6793
6794         if (WARN_ON(!rdev->testmode_info)) {
6795                 kfree_skb(skb);
6796                 return -EINVAL;
6797         }
6798
6799         nla_nest_end(skb, data);
6800         genlmsg_end(skb, hdr);
6801         return genlmsg_reply(skb, rdev->testmode_info);
6802 }
6803 EXPORT_SYMBOL(cfg80211_testmode_reply);
6804
6805 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6806                                                   int approxlen, gfp_t gfp)
6807 {
6808         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6809
6810         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6811 }
6812 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6813
6814 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6815 {
6816         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6817         void *hdr = ((void **)skb->cb)[1];
6818         struct nlattr *data = ((void **)skb->cb)[2];
6819
6820         nla_nest_end(skb, data);
6821         genlmsg_end(skb, hdr);
6822         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6823                                 nl80211_testmode_mcgrp.id, gfp);
6824 }
6825 EXPORT_SYMBOL(cfg80211_testmode_event);
6826 #endif
6827
6828 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6829 {
6830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6831         struct net_device *dev = info->user_ptr[1];
6832         struct cfg80211_connect_params connect;
6833         struct wiphy *wiphy;
6834         struct cfg80211_cached_keys *connkeys = NULL;
6835         int err;
6836
6837         memset(&connect, 0, sizeof(connect));
6838
6839         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6840                 return -EINVAL;
6841
6842         if (!info->attrs[NL80211_ATTR_SSID] ||
6843             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6844                 return -EINVAL;
6845
6846         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6847                 connect.auth_type =
6848                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6849                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6850                                              NL80211_CMD_CONNECT))
6851                         return -EINVAL;
6852         } else
6853                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6854
6855         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6856
6857         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6858                                       NL80211_MAX_NR_CIPHER_SUITES);
6859         if (err)
6860                 return err;
6861
6862         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6863             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6864                 return -EOPNOTSUPP;
6865
6866         wiphy = &rdev->wiphy;
6867
6868         connect.bg_scan_period = -1;
6869         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6870                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6871                 connect.bg_scan_period =
6872                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6873         }
6874
6875         if (info->attrs[NL80211_ATTR_MAC])
6876                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6877         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6878         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6879
6880         if (info->attrs[NL80211_ATTR_IE]) {
6881                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6882                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6883         }
6884
6885         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6886                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6887                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6888                     connect.mfp != NL80211_MFP_NO)
6889                         return -EINVAL;
6890         } else {
6891                 connect.mfp = NL80211_MFP_NO;
6892         }
6893
6894         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6895                 connect.channel =
6896                         ieee80211_get_channel(wiphy,
6897                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6898                 if (!connect.channel ||
6899                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6900                         return -EINVAL;
6901         }
6902
6903         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6904                 connkeys = nl80211_parse_connkeys(rdev,
6905                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6906                 if (IS_ERR(connkeys))
6907                         return PTR_ERR(connkeys);
6908         }
6909
6910         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6911                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6912
6913         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6914                 memcpy(&connect.ht_capa_mask,
6915                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6916                        sizeof(connect.ht_capa_mask));
6917
6918         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6919                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6920                         kfree(connkeys);
6921                         return -EINVAL;
6922                 }
6923                 memcpy(&connect.ht_capa,
6924                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6925                        sizeof(connect.ht_capa));
6926         }
6927
6928         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6929                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6930
6931         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6932                 memcpy(&connect.vht_capa_mask,
6933                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6934                        sizeof(connect.vht_capa_mask));
6935
6936         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6937                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6938                         kfree(connkeys);
6939                         return -EINVAL;
6940                 }
6941                 memcpy(&connect.vht_capa,
6942                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6943                        sizeof(connect.vht_capa));
6944         }
6945
6946         wdev_lock(dev->ieee80211_ptr);
6947         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6948         wdev_unlock(dev->ieee80211_ptr);
6949         if (err)
6950                 kfree(connkeys);
6951         return err;
6952 }
6953
6954 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6955 {
6956         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6957         struct net_device *dev = info->user_ptr[1];
6958         u16 reason;
6959         int ret;
6960
6961         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6962                 reason = WLAN_REASON_DEAUTH_LEAVING;
6963         else
6964                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6965
6966         if (reason == 0)
6967                 return -EINVAL;
6968
6969         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6970             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6971                 return -EOPNOTSUPP;
6972
6973         wdev_lock(dev->ieee80211_ptr);
6974         ret = cfg80211_disconnect(rdev, dev, reason, true);
6975         wdev_unlock(dev->ieee80211_ptr);
6976         return ret;
6977 }
6978
6979 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6980 {
6981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6982         struct net *net;
6983         int err;
6984         u32 pid;
6985
6986         if (!info->attrs[NL80211_ATTR_PID])
6987                 return -EINVAL;
6988
6989         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6990
6991         net = get_net_ns_by_pid(pid);
6992         if (IS_ERR(net))
6993                 return PTR_ERR(net);
6994
6995         err = 0;
6996
6997         /* check if anything to do */
6998         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6999                 err = cfg80211_switch_netns(rdev, net);
7000
7001         put_net(net);
7002         return err;
7003 }
7004
7005 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7006 {
7007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7008         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7009                         struct cfg80211_pmksa *pmksa) = NULL;
7010         struct net_device *dev = info->user_ptr[1];
7011         struct cfg80211_pmksa pmksa;
7012
7013         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7014
7015         if (!info->attrs[NL80211_ATTR_MAC])
7016                 return -EINVAL;
7017
7018         if (!info->attrs[NL80211_ATTR_PMKID])
7019                 return -EINVAL;
7020
7021         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7022         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7023
7024         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7025             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7026                 return -EOPNOTSUPP;
7027
7028         switch (info->genlhdr->cmd) {
7029         case NL80211_CMD_SET_PMKSA:
7030                 rdev_ops = rdev->ops->set_pmksa;
7031                 break;
7032         case NL80211_CMD_DEL_PMKSA:
7033                 rdev_ops = rdev->ops->del_pmksa;
7034                 break;
7035         default:
7036                 WARN_ON(1);
7037                 break;
7038         }
7039
7040         if (!rdev_ops)
7041                 return -EOPNOTSUPP;
7042
7043         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7044 }
7045
7046 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7047 {
7048         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7049         struct net_device *dev = info->user_ptr[1];
7050
7051         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7052             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7053                 return -EOPNOTSUPP;
7054
7055         if (!rdev->ops->flush_pmksa)
7056                 return -EOPNOTSUPP;
7057
7058         return rdev_flush_pmksa(rdev, dev);
7059 }
7060
7061 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7062 {
7063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7064         struct net_device *dev = info->user_ptr[1];
7065         u8 action_code, dialog_token;
7066         u16 status_code;
7067         u8 *peer;
7068
7069         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7070             !rdev->ops->tdls_mgmt)
7071                 return -EOPNOTSUPP;
7072
7073         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7074             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7075             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7076             !info->attrs[NL80211_ATTR_IE] ||
7077             !info->attrs[NL80211_ATTR_MAC])
7078                 return -EINVAL;
7079
7080         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7081         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7082         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7083         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7084
7085         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7086                               dialog_token, status_code,
7087                               nla_data(info->attrs[NL80211_ATTR_IE]),
7088                               nla_len(info->attrs[NL80211_ATTR_IE]));
7089 }
7090
7091 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7092 {
7093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7094         struct net_device *dev = info->user_ptr[1];
7095         enum nl80211_tdls_operation operation;
7096         u8 *peer;
7097
7098         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7099             !rdev->ops->tdls_oper)
7100                 return -EOPNOTSUPP;
7101
7102         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7103             !info->attrs[NL80211_ATTR_MAC])
7104                 return -EINVAL;
7105
7106         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7107         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7108
7109         return rdev_tdls_oper(rdev, dev, peer, operation);
7110 }
7111
7112 static int nl80211_remain_on_channel(struct sk_buff *skb,
7113                                      struct genl_info *info)
7114 {
7115         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7116         struct wireless_dev *wdev = info->user_ptr[1];
7117         struct cfg80211_chan_def chandef;
7118         struct sk_buff *msg;
7119         void *hdr;
7120         u64 cookie;
7121         u32 duration;
7122         int err;
7123
7124         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7125             !info->attrs[NL80211_ATTR_DURATION])
7126                 return -EINVAL;
7127
7128         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7129
7130         if (!rdev->ops->remain_on_channel ||
7131             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7132                 return -EOPNOTSUPP;
7133
7134         /*
7135          * We should be on that channel for at least a minimum amount of
7136          * time (10ms) but no longer than the driver supports.
7137          */
7138         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7139             duration > rdev->wiphy.max_remain_on_channel_duration)
7140                 return -EINVAL;
7141
7142         err = nl80211_parse_chandef(rdev, info, &chandef);
7143         if (err)
7144                 return err;
7145
7146         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7147         if (!msg)
7148                 return -ENOMEM;
7149
7150         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7151                              NL80211_CMD_REMAIN_ON_CHANNEL);
7152         if (!hdr) {
7153                 err = -ENOBUFS;
7154                 goto free_msg;
7155         }
7156
7157         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7158                                      duration, &cookie);
7159
7160         if (err)
7161                 goto free_msg;
7162
7163         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7164                 goto nla_put_failure;
7165
7166         genlmsg_end(msg, hdr);
7167
7168         return genlmsg_reply(msg, info);
7169
7170  nla_put_failure:
7171         err = -ENOBUFS;
7172  free_msg:
7173         nlmsg_free(msg);
7174         return err;
7175 }
7176
7177 static int nl80211_cancel_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         u64 cookie;
7183
7184         if (!info->attrs[NL80211_ATTR_COOKIE])
7185                 return -EINVAL;
7186
7187         if (!rdev->ops->cancel_remain_on_channel)
7188                 return -EOPNOTSUPP;
7189
7190         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7191
7192         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7193 }
7194
7195 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7196                            u8 *rates, u8 rates_len)
7197 {
7198         u8 i;
7199         u32 mask = 0;
7200
7201         for (i = 0; i < rates_len; i++) {
7202                 int rate = (rates[i] & 0x7f) * 5;
7203                 int ridx;
7204                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7205                         struct ieee80211_rate *srate =
7206                                 &sband->bitrates[ridx];
7207                         if (rate == srate->bitrate) {
7208                                 mask |= 1 << ridx;
7209                                 break;
7210                         }
7211                 }
7212                 if (ridx == sband->n_bitrates)
7213                         return 0; /* rate not found */
7214         }
7215
7216         return mask;
7217 }
7218
7219 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7220                                u8 *rates, u8 rates_len,
7221                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7222 {
7223         u8 i;
7224
7225         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7226
7227         for (i = 0; i < rates_len; i++) {
7228                 int ridx, rbit;
7229
7230                 ridx = rates[i] / 8;
7231                 rbit = BIT(rates[i] % 8);
7232
7233                 /* check validity */
7234                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7235                         return false;
7236
7237                 /* check availability */
7238                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7239                         mcs[ridx] |= rbit;
7240                 else
7241                         return false;
7242         }
7243
7244         return true;
7245 }
7246
7247 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7248         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7249                                     .len = NL80211_MAX_SUPP_RATES },
7250         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7251                                  .len = NL80211_MAX_SUPP_HT_RATES },
7252 };
7253
7254 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7255                                        struct genl_info *info)
7256 {
7257         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7259         struct cfg80211_bitrate_mask mask;
7260         int rem, i;
7261         struct net_device *dev = info->user_ptr[1];
7262         struct nlattr *tx_rates;
7263         struct ieee80211_supported_band *sband;
7264
7265         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7266                 return -EINVAL;
7267
7268         if (!rdev->ops->set_bitrate_mask)
7269                 return -EOPNOTSUPP;
7270
7271         memset(&mask, 0, sizeof(mask));
7272         /* Default to all rates enabled */
7273         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7274                 sband = rdev->wiphy.bands[i];
7275                 mask.control[i].legacy =
7276                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7277                 if (sband)
7278                         memcpy(mask.control[i].mcs,
7279                                sband->ht_cap.mcs.rx_mask,
7280                                sizeof(mask.control[i].mcs));
7281                 else
7282                         memset(mask.control[i].mcs, 0,
7283                                sizeof(mask.control[i].mcs));
7284         }
7285
7286         /*
7287          * The nested attribute uses enum nl80211_band as the index. This maps
7288          * directly to the enum ieee80211_band values used in cfg80211.
7289          */
7290         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7291         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7292         {
7293                 enum ieee80211_band band = nla_type(tx_rates);
7294                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7295                         return -EINVAL;
7296                 sband = rdev->wiphy.bands[band];
7297                 if (sband == NULL)
7298                         return -EINVAL;
7299                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7300                           nla_len(tx_rates), nl80211_txattr_policy);
7301                 if (tb[NL80211_TXRATE_LEGACY]) {
7302                         mask.control[band].legacy = rateset_to_mask(
7303                                 sband,
7304                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7305                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7306                         if ((mask.control[band].legacy == 0) &&
7307                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7308                                 return -EINVAL;
7309                 }
7310                 if (tb[NL80211_TXRATE_MCS]) {
7311                         if (!ht_rateset_to_mask(
7312                                         sband,
7313                                         nla_data(tb[NL80211_TXRATE_MCS]),
7314                                         nla_len(tb[NL80211_TXRATE_MCS]),
7315                                         mask.control[band].mcs))
7316                                 return -EINVAL;
7317                 }
7318
7319                 if (mask.control[band].legacy == 0) {
7320                         /* don't allow empty legacy rates if HT
7321                          * is not even supported. */
7322                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7323                                 return -EINVAL;
7324
7325                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7326                                 if (mask.control[band].mcs[i])
7327                                         break;
7328
7329                         /* legacy and mcs rates may not be both empty */
7330                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7331                                 return -EINVAL;
7332                 }
7333         }
7334
7335         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7336 }
7337
7338 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7339 {
7340         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7341         struct wireless_dev *wdev = info->user_ptr[1];
7342         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7343
7344         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7345                 return -EINVAL;
7346
7347         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7348                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7349
7350         switch (wdev->iftype) {
7351         case NL80211_IFTYPE_STATION:
7352         case NL80211_IFTYPE_ADHOC:
7353         case NL80211_IFTYPE_P2P_CLIENT:
7354         case NL80211_IFTYPE_AP:
7355         case NL80211_IFTYPE_AP_VLAN:
7356         case NL80211_IFTYPE_MESH_POINT:
7357         case NL80211_IFTYPE_P2P_GO:
7358         case NL80211_IFTYPE_P2P_DEVICE:
7359                 break;
7360         default:
7361                 return -EOPNOTSUPP;
7362         }
7363
7364         /* not much point in registering if we can't reply */
7365         if (!rdev->ops->mgmt_tx)
7366                 return -EOPNOTSUPP;
7367
7368         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7369                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7370                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7371 }
7372
7373 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7374 {
7375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7376         struct wireless_dev *wdev = info->user_ptr[1];
7377         struct cfg80211_chan_def chandef;
7378         int err;
7379         void *hdr = NULL;
7380         u64 cookie;
7381         struct sk_buff *msg = NULL;
7382         unsigned int wait = 0;
7383         bool offchan, no_cck, dont_wait_for_ack;
7384
7385         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7386
7387         if (!info->attrs[NL80211_ATTR_FRAME])
7388                 return -EINVAL;
7389
7390         if (!rdev->ops->mgmt_tx)
7391                 return -EOPNOTSUPP;
7392
7393         switch (wdev->iftype) {
7394         case NL80211_IFTYPE_P2P_DEVICE:
7395                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7396                         return -EINVAL;
7397         case NL80211_IFTYPE_STATION:
7398         case NL80211_IFTYPE_ADHOC:
7399         case NL80211_IFTYPE_P2P_CLIENT:
7400         case NL80211_IFTYPE_AP:
7401         case NL80211_IFTYPE_AP_VLAN:
7402         case NL80211_IFTYPE_MESH_POINT:
7403         case NL80211_IFTYPE_P2P_GO:
7404                 break;
7405         default:
7406                 return -EOPNOTSUPP;
7407         }
7408
7409         if (info->attrs[NL80211_ATTR_DURATION]) {
7410                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7411                         return -EINVAL;
7412                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7413
7414                 /*
7415                  * We should wait on the channel for at least a minimum amount
7416                  * of time (10ms) but no longer than the driver supports.
7417                  */
7418                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7419                     wait > rdev->wiphy.max_remain_on_channel_duration)
7420                         return -EINVAL;
7421
7422         }
7423
7424         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7425
7426         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7427                 return -EINVAL;
7428
7429         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7430
7431         /* get the channel if any has been specified, otherwise pass NULL to
7432          * the driver. The latter will use the current one
7433          */
7434         chandef.chan = NULL;
7435         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7436                 err = nl80211_parse_chandef(rdev, info, &chandef);
7437                 if (err)
7438                         return err;
7439         }
7440
7441         if (!chandef.chan && offchan)
7442                 return -EINVAL;
7443
7444         if (!dont_wait_for_ack) {
7445                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7446                 if (!msg)
7447                         return -ENOMEM;
7448
7449                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7450                                      NL80211_CMD_FRAME);
7451                 if (!hdr) {
7452                         err = -ENOBUFS;
7453                         goto free_msg;
7454                 }
7455         }
7456
7457         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7458                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7459                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7460                                     no_cck, dont_wait_for_ack, &cookie);
7461         if (err)
7462                 goto free_msg;
7463
7464         if (msg) {
7465                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7466                         goto nla_put_failure;
7467
7468                 genlmsg_end(msg, hdr);
7469                 return genlmsg_reply(msg, info);
7470         }
7471
7472         return 0;
7473
7474  nla_put_failure:
7475         err = -ENOBUFS;
7476  free_msg:
7477         nlmsg_free(msg);
7478         return err;
7479 }
7480
7481 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7482 {
7483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7484         struct wireless_dev *wdev = info->user_ptr[1];
7485         u64 cookie;
7486
7487         if (!info->attrs[NL80211_ATTR_COOKIE])
7488                 return -EINVAL;
7489
7490         if (!rdev->ops->mgmt_tx_cancel_wait)
7491                 return -EOPNOTSUPP;
7492
7493         switch (wdev->iftype) {
7494         case NL80211_IFTYPE_STATION:
7495         case NL80211_IFTYPE_ADHOC:
7496         case NL80211_IFTYPE_P2P_CLIENT:
7497         case NL80211_IFTYPE_AP:
7498         case NL80211_IFTYPE_AP_VLAN:
7499         case NL80211_IFTYPE_P2P_GO:
7500         case NL80211_IFTYPE_P2P_DEVICE:
7501                 break;
7502         default:
7503                 return -EOPNOTSUPP;
7504         }
7505
7506         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7507
7508         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7509 }
7510
7511 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7512 {
7513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7514         struct wireless_dev *wdev;
7515         struct net_device *dev = info->user_ptr[1];
7516         u8 ps_state;
7517         bool state;
7518         int err;
7519
7520         if (!info->attrs[NL80211_ATTR_PS_STATE])
7521                 return -EINVAL;
7522
7523         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7524
7525         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7526                 return -EINVAL;
7527
7528         wdev = dev->ieee80211_ptr;
7529
7530         if (!rdev->ops->set_power_mgmt)
7531                 return -EOPNOTSUPP;
7532
7533         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7534
7535         if (state == wdev->ps)
7536                 return 0;
7537
7538         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7539         if (!err)
7540                 wdev->ps = state;
7541         return err;
7542 }
7543
7544 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7545 {
7546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7547         enum nl80211_ps_state ps_state;
7548         struct wireless_dev *wdev;
7549         struct net_device *dev = info->user_ptr[1];
7550         struct sk_buff *msg;
7551         void *hdr;
7552         int err;
7553
7554         wdev = dev->ieee80211_ptr;
7555
7556         if (!rdev->ops->set_power_mgmt)
7557                 return -EOPNOTSUPP;
7558
7559         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7560         if (!msg)
7561                 return -ENOMEM;
7562
7563         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7564                              NL80211_CMD_GET_POWER_SAVE);
7565         if (!hdr) {
7566                 err = -ENOBUFS;
7567                 goto free_msg;
7568         }
7569
7570         if (wdev->ps)
7571                 ps_state = NL80211_PS_ENABLED;
7572         else
7573                 ps_state = NL80211_PS_DISABLED;
7574
7575         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7576                 goto nla_put_failure;
7577
7578         genlmsg_end(msg, hdr);
7579         return genlmsg_reply(msg, info);
7580
7581  nla_put_failure:
7582         err = -ENOBUFS;
7583  free_msg:
7584         nlmsg_free(msg);
7585         return err;
7586 }
7587
7588 static struct nla_policy
7589 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7590         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7591         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7592         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7593         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7594         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7595         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7596 };
7597
7598 static int nl80211_set_cqm_txe(struct genl_info *info,
7599                                u32 rate, u32 pkts, u32 intvl)
7600 {
7601         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7602         struct net_device *dev = info->user_ptr[1];
7603         struct wireless_dev *wdev = dev->ieee80211_ptr;
7604
7605         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7606                 return -EINVAL;
7607
7608         if (!rdev->ops->set_cqm_txe_config)
7609                 return -EOPNOTSUPP;
7610
7611         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7612             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7613                 return -EOPNOTSUPP;
7614
7615         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7616 }
7617
7618 static int nl80211_set_cqm_rssi(struct genl_info *info,
7619                                 s32 threshold, u32 hysteresis)
7620 {
7621         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7622         struct net_device *dev = info->user_ptr[1];
7623         struct wireless_dev *wdev = dev->ieee80211_ptr;
7624
7625         if (threshold > 0)
7626                 return -EINVAL;
7627
7628         /* disabling - hysteresis should also be zero then */
7629         if (threshold == 0)
7630                 hysteresis = 0;
7631
7632         if (!rdev->ops->set_cqm_rssi_config)
7633                 return -EOPNOTSUPP;
7634
7635         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7636             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7637                 return -EOPNOTSUPP;
7638
7639         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7640 }
7641
7642 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7643 {
7644         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7645         struct nlattr *cqm;
7646         int err;
7647
7648         cqm = info->attrs[NL80211_ATTR_CQM];
7649         if (!cqm)
7650                 return -EINVAL;
7651
7652         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7653                                nl80211_attr_cqm_policy);
7654         if (err)
7655                 return err;
7656
7657         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7658             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7659                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7660                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7661
7662                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7663         }
7664
7665         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7666             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7667             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7668                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7669                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7670                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7671
7672                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7673         }
7674
7675         return -EINVAL;
7676 }
7677
7678 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7679 {
7680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7681         struct net_device *dev = info->user_ptr[1];
7682         struct mesh_config cfg;
7683         struct mesh_setup setup;
7684         int err;
7685
7686         /* start with default */
7687         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7688         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7689
7690         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7691                 /* and parse parameters if given */
7692                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7693                 if (err)
7694                         return err;
7695         }
7696
7697         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7698             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7699                 return -EINVAL;
7700
7701         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7702         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7703
7704         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7705             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7706                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7707                         return -EINVAL;
7708
7709         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7710                 setup.beacon_interval =
7711                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7712                 if (setup.beacon_interval < 10 ||
7713                     setup.beacon_interval > 10000)
7714                         return -EINVAL;
7715         }
7716
7717         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7718                 setup.dtim_period =
7719                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7720                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7721                         return -EINVAL;
7722         }
7723
7724         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7725                 /* parse additional setup parameters if given */
7726                 err = nl80211_parse_mesh_setup(info, &setup);
7727                 if (err)
7728                         return err;
7729         }
7730
7731         if (setup.user_mpm)
7732                 cfg.auto_open_plinks = false;
7733
7734         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7735                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7736                 if (err)
7737                         return err;
7738         } else {
7739                 /* cfg80211_join_mesh() will sort it out */
7740                 setup.chandef.chan = NULL;
7741         }
7742
7743         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7744                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7745                 int n_rates =
7746                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7747                 struct ieee80211_supported_band *sband;
7748
7749                 if (!setup.chandef.chan)
7750                         return -EINVAL;
7751
7752                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7753
7754                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7755                                              &setup.basic_rates);
7756                 if (err)
7757                         return err;
7758         }
7759
7760         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7761 }
7762
7763 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7764 {
7765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7766         struct net_device *dev = info->user_ptr[1];
7767
7768         return cfg80211_leave_mesh(rdev, dev);
7769 }
7770
7771 #ifdef CONFIG_PM
7772 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7773                                         struct cfg80211_registered_device *rdev)
7774 {
7775         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7776         struct nlattr *nl_pats, *nl_pat;
7777         int i, pat_len;
7778
7779         if (!wowlan->n_patterns)
7780                 return 0;
7781
7782         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7783         if (!nl_pats)
7784                 return -ENOBUFS;
7785
7786         for (i = 0; i < wowlan->n_patterns; i++) {
7787                 nl_pat = nla_nest_start(msg, i + 1);
7788                 if (!nl_pat)
7789                         return -ENOBUFS;
7790                 pat_len = wowlan->patterns[i].pattern_len;
7791                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7792                             wowlan->patterns[i].mask) ||
7793                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7794                             wowlan->patterns[i].pattern) ||
7795                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7796                                 wowlan->patterns[i].pkt_offset))
7797                         return -ENOBUFS;
7798                 nla_nest_end(msg, nl_pat);
7799         }
7800         nla_nest_end(msg, nl_pats);
7801
7802         return 0;
7803 }
7804
7805 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7806                                    struct cfg80211_wowlan_tcp *tcp)
7807 {
7808         struct nlattr *nl_tcp;
7809
7810         if (!tcp)
7811                 return 0;
7812
7813         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7814         if (!nl_tcp)
7815                 return -ENOBUFS;
7816
7817         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7818             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7819             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7820             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7821             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7822             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7823                     tcp->payload_len, tcp->payload) ||
7824             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7825                         tcp->data_interval) ||
7826             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7827                     tcp->wake_len, tcp->wake_data) ||
7828             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7829                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7830                 return -ENOBUFS;
7831
7832         if (tcp->payload_seq.len &&
7833             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7834                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7835                 return -ENOBUFS;
7836
7837         if (tcp->payload_tok.len &&
7838             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7839                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7840                     &tcp->payload_tok))
7841                 return -ENOBUFS;
7842
7843         nla_nest_end(msg, nl_tcp);
7844
7845         return 0;
7846 }
7847
7848 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7849 {
7850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7851         struct sk_buff *msg;
7852         void *hdr;
7853         u32 size = NLMSG_DEFAULT_SIZE;
7854
7855         if (!rdev->wiphy.wowlan)
7856                 return -EOPNOTSUPP;
7857
7858         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7859                 /* adjust size to have room for all the data */
7860                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7861                         rdev->wiphy.wowlan_config->tcp->payload_len +
7862                         rdev->wiphy.wowlan_config->tcp->wake_len +
7863                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7864         }
7865
7866         msg = nlmsg_new(size, GFP_KERNEL);
7867         if (!msg)
7868                 return -ENOMEM;
7869
7870         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7871                              NL80211_CMD_GET_WOWLAN);
7872         if (!hdr)
7873                 goto nla_put_failure;
7874
7875         if (rdev->wiphy.wowlan_config) {
7876                 struct nlattr *nl_wowlan;
7877
7878                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7879                 if (!nl_wowlan)
7880                         goto nla_put_failure;
7881
7882                 if ((rdev->wiphy.wowlan_config->any &&
7883                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7884                     (rdev->wiphy.wowlan_config->disconnect &&
7885                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7886                     (rdev->wiphy.wowlan_config->magic_pkt &&
7887                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7888                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7889                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7890                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7891                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7892                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7893                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7894                     (rdev->wiphy.wowlan_config->rfkill_release &&
7895                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7896                         goto nla_put_failure;
7897
7898                 if (nl80211_send_wowlan_patterns(msg, rdev))
7899                         goto nla_put_failure;
7900
7901                 if (nl80211_send_wowlan_tcp(msg,
7902                                             rdev->wiphy.wowlan_config->tcp))
7903                         goto nla_put_failure;
7904
7905                 nla_nest_end(msg, nl_wowlan);
7906         }
7907
7908         genlmsg_end(msg, hdr);
7909         return genlmsg_reply(msg, info);
7910
7911 nla_put_failure:
7912         nlmsg_free(msg);
7913         return -ENOBUFS;
7914 }
7915
7916 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7917                                     struct nlattr *attr,
7918                                     struct cfg80211_wowlan *trig)
7919 {
7920         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7921         struct cfg80211_wowlan_tcp *cfg;
7922         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7923         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7924         u32 size;
7925         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7926         int err, port;
7927
7928         if (!rdev->wiphy.wowlan->tcp)
7929                 return -EINVAL;
7930
7931         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7932                         nla_data(attr), nla_len(attr),
7933                         nl80211_wowlan_tcp_policy);
7934         if (err)
7935                 return err;
7936
7937         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7938             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7939             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7940             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7941             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7942             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7943             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7944             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7945                 return -EINVAL;
7946
7947         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7948         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
7949                 return -EINVAL;
7950
7951         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7952                         rdev->wiphy.wowlan->tcp->data_interval_max ||
7953             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7954                 return -EINVAL;
7955
7956         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7957         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
7958                 return -EINVAL;
7959
7960         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7961         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7962                 return -EINVAL;
7963
7964         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7965                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7966
7967                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7968                 tokens_size = tokln - sizeof(*tok);
7969
7970                 if (!tok->len || tokens_size % tok->len)
7971                         return -EINVAL;
7972                 if (!rdev->wiphy.wowlan->tcp->tok)
7973                         return -EINVAL;
7974                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
7975                         return -EINVAL;
7976                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
7977                         return -EINVAL;
7978                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
7979                         return -EINVAL;
7980                 if (tok->offset + tok->len > data_size)
7981                         return -EINVAL;
7982         }
7983
7984         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7985                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7986                 if (!rdev->wiphy.wowlan->tcp->seq)
7987                         return -EINVAL;
7988                 if (seq->len == 0 || seq->len > 4)
7989                         return -EINVAL;
7990                 if (seq->len + seq->offset > data_size)
7991                         return -EINVAL;
7992         }
7993
7994         size = sizeof(*cfg);
7995         size += data_size;
7996         size += wake_size + wake_mask_size;
7997         size += tokens_size;
7998
7999         cfg = kzalloc(size, GFP_KERNEL);
8000         if (!cfg)
8001                 return -ENOMEM;
8002         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8003         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8004         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8005                ETH_ALEN);
8006         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8007                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8008         else
8009                 port = 0;
8010 #ifdef CONFIG_INET
8011         /* allocate a socket and port for it and use it */
8012         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8013                             IPPROTO_TCP, &cfg->sock, 1);
8014         if (err) {
8015                 kfree(cfg);
8016                 return err;
8017         }
8018         if (inet_csk_get_port(cfg->sock->sk, port)) {
8019                 sock_release(cfg->sock);
8020                 kfree(cfg);
8021                 return -EADDRINUSE;
8022         }
8023         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8024 #else
8025         if (!port) {
8026                 kfree(cfg);
8027                 return -EINVAL;
8028         }
8029         cfg->src_port = port;
8030 #endif
8031
8032         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8033         cfg->payload_len = data_size;
8034         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8035         memcpy((void *)cfg->payload,
8036                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8037                data_size);
8038         if (seq)
8039                 cfg->payload_seq = *seq;
8040         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8041         cfg->wake_len = wake_size;
8042         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8043         memcpy((void *)cfg->wake_data,
8044                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8045                wake_size);
8046         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8047                          data_size + wake_size;
8048         memcpy((void *)cfg->wake_mask,
8049                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8050                wake_mask_size);
8051         if (tok) {
8052                 cfg->tokens_size = tokens_size;
8053                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8054         }
8055
8056         trig->tcp = cfg;
8057
8058         return 0;
8059 }
8060
8061 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8062 {
8063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8064         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8065         struct cfg80211_wowlan new_triggers = {};
8066         struct cfg80211_wowlan *ntrig;
8067         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8068         int err, i;
8069         bool prev_enabled = rdev->wiphy.wowlan_config;
8070
8071         if (!wowlan)
8072                 return -EOPNOTSUPP;
8073
8074         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8075                 cfg80211_rdev_free_wowlan(rdev);
8076                 rdev->wiphy.wowlan_config = NULL;
8077                 goto set_wakeup;
8078         }
8079
8080         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8081                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8082                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8083                         nl80211_wowlan_policy);
8084         if (err)
8085                 return err;
8086
8087         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8088                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8089                         return -EINVAL;
8090                 new_triggers.any = true;
8091         }
8092
8093         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8094                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8095                         return -EINVAL;
8096                 new_triggers.disconnect = true;
8097         }
8098
8099         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8100                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8101                         return -EINVAL;
8102                 new_triggers.magic_pkt = true;
8103         }
8104
8105         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8106                 return -EINVAL;
8107
8108         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8109                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8110                         return -EINVAL;
8111                 new_triggers.gtk_rekey_failure = true;
8112         }
8113
8114         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8115                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8116                         return -EINVAL;
8117                 new_triggers.eap_identity_req = true;
8118         }
8119
8120         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8121                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8122                         return -EINVAL;
8123                 new_triggers.four_way_handshake = true;
8124         }
8125
8126         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8127                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8128                         return -EINVAL;
8129                 new_triggers.rfkill_release = true;
8130         }
8131
8132         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8133                 struct nlattr *pat;
8134                 int n_patterns = 0;
8135                 int rem, pat_len, mask_len, pkt_offset;
8136                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8137
8138                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8139                                     rem)
8140                         n_patterns++;
8141                 if (n_patterns > wowlan->n_patterns)
8142                         return -EINVAL;
8143
8144                 new_triggers.patterns = kcalloc(n_patterns,
8145                                                 sizeof(new_triggers.patterns[0]),
8146                                                 GFP_KERNEL);
8147                 if (!new_triggers.patterns)
8148                         return -ENOMEM;
8149
8150                 new_triggers.n_patterns = n_patterns;
8151                 i = 0;
8152
8153                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8154                                     rem) {
8155                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8156                                   nla_len(pat), NULL);
8157                         err = -EINVAL;
8158                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8159                             !pat_tb[NL80211_PKTPAT_PATTERN])
8160                                 goto error;
8161                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8162                         mask_len = DIV_ROUND_UP(pat_len, 8);
8163                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8164                                 goto error;
8165                         if (pat_len > wowlan->pattern_max_len ||
8166                             pat_len < wowlan->pattern_min_len)
8167                                 goto error;
8168
8169                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8170                                 pkt_offset = 0;
8171                         else
8172                                 pkt_offset = nla_get_u32(
8173                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8174                         if (pkt_offset > wowlan->max_pkt_offset)
8175                                 goto error;
8176                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8177
8178                         new_triggers.patterns[i].mask =
8179                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8180                         if (!new_triggers.patterns[i].mask) {
8181                                 err = -ENOMEM;
8182                                 goto error;
8183                         }
8184                         new_triggers.patterns[i].pattern =
8185                                 new_triggers.patterns[i].mask + mask_len;
8186                         memcpy(new_triggers.patterns[i].mask,
8187                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8188                                mask_len);
8189                         new_triggers.patterns[i].pattern_len = pat_len;
8190                         memcpy(new_triggers.patterns[i].pattern,
8191                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8192                                pat_len);
8193                         i++;
8194                 }
8195         }
8196
8197         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8198                 err = nl80211_parse_wowlan_tcp(
8199                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8200                         &new_triggers);
8201                 if (err)
8202                         goto error;
8203         }
8204
8205         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8206         if (!ntrig) {
8207                 err = -ENOMEM;
8208                 goto error;
8209         }
8210         cfg80211_rdev_free_wowlan(rdev);
8211         rdev->wiphy.wowlan_config = ntrig;
8212
8213  set_wakeup:
8214         if (rdev->ops->set_wakeup &&
8215             prev_enabled != !!rdev->wiphy.wowlan_config)
8216                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8217
8218         return 0;
8219  error:
8220         for (i = 0; i < new_triggers.n_patterns; i++)
8221                 kfree(new_triggers.patterns[i].mask);
8222         kfree(new_triggers.patterns);
8223         if (new_triggers.tcp && new_triggers.tcp->sock)
8224                 sock_release(new_triggers.tcp->sock);
8225         kfree(new_triggers.tcp);
8226         return err;
8227 }
8228 #endif
8229
8230 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8231                                        struct cfg80211_registered_device *rdev)
8232 {
8233         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8234         int i, j, pat_len;
8235         struct cfg80211_coalesce_rules *rule;
8236
8237         if (!rdev->coalesce->n_rules)
8238                 return 0;
8239
8240         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8241         if (!nl_rules)
8242                 return -ENOBUFS;
8243
8244         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8245                 nl_rule = nla_nest_start(msg, i + 1);
8246                 if (!nl_rule)
8247                         return -ENOBUFS;
8248
8249                 rule = &rdev->coalesce->rules[i];
8250                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8251                                 rule->delay))
8252                         return -ENOBUFS;
8253
8254                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8255                                 rule->condition))
8256                         return -ENOBUFS;
8257
8258                 nl_pats = nla_nest_start(msg,
8259                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8260                 if (!nl_pats)
8261                         return -ENOBUFS;
8262
8263                 for (j = 0; j < rule->n_patterns; j++) {
8264                         nl_pat = nla_nest_start(msg, j + 1);
8265                         if (!nl_pat)
8266                                 return -ENOBUFS;
8267                         pat_len = rule->patterns[j].pattern_len;
8268                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8269                                     DIV_ROUND_UP(pat_len, 8),
8270                                     rule->patterns[j].mask) ||
8271                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8272                                     rule->patterns[j].pattern) ||
8273                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8274                                         rule->patterns[j].pkt_offset))
8275                                 return -ENOBUFS;
8276                         nla_nest_end(msg, nl_pat);
8277                 }
8278                 nla_nest_end(msg, nl_pats);
8279                 nla_nest_end(msg, nl_rule);
8280         }
8281         nla_nest_end(msg, nl_rules);
8282
8283         return 0;
8284 }
8285
8286 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8287 {
8288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8289         struct sk_buff *msg;
8290         void *hdr;
8291
8292         if (!rdev->wiphy.coalesce)
8293                 return -EOPNOTSUPP;
8294
8295         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8296         if (!msg)
8297                 return -ENOMEM;
8298
8299         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8300                              NL80211_CMD_GET_COALESCE);
8301         if (!hdr)
8302                 goto nla_put_failure;
8303
8304         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8305                 goto nla_put_failure;
8306
8307         genlmsg_end(msg, hdr);
8308         return genlmsg_reply(msg, info);
8309
8310 nla_put_failure:
8311         nlmsg_free(msg);
8312         return -ENOBUFS;
8313 }
8314
8315 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8316 {
8317         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8318         int i, j;
8319         struct cfg80211_coalesce_rules *rule;
8320
8321         if (!coalesce)
8322                 return;
8323
8324         for (i = 0; i < coalesce->n_rules; i++) {
8325                 rule = &coalesce->rules[i];
8326                 for (j = 0; j < rule->n_patterns; j++)
8327                         kfree(rule->patterns[j].mask);
8328                 kfree(rule->patterns);
8329         }
8330         kfree(coalesce->rules);
8331         kfree(coalesce);
8332         rdev->coalesce = NULL;
8333 }
8334
8335 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8336                                        struct nlattr *rule,
8337                                        struct cfg80211_coalesce_rules *new_rule)
8338 {
8339         int err, i;
8340         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8341         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8342         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8343         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8344
8345         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8346                         nla_len(rule), nl80211_coalesce_policy);
8347         if (err)
8348                 return err;
8349
8350         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8351                 new_rule->delay =
8352                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8353         if (new_rule->delay > coalesce->max_delay)
8354                 return -EINVAL;
8355
8356         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8357                 new_rule->condition =
8358                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8359         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8360             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8361                 return -EINVAL;
8362
8363         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8364                 return -EINVAL;
8365
8366         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8367                             rem)
8368                 n_patterns++;
8369         if (n_patterns > coalesce->n_patterns)
8370                 return -EINVAL;
8371
8372         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8373                                      GFP_KERNEL);
8374         if (!new_rule->patterns)
8375                 return -ENOMEM;
8376
8377         new_rule->n_patterns = n_patterns;
8378         i = 0;
8379
8380         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8381                             rem) {
8382                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8383                           nla_len(pat), NULL);
8384                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8385                     !pat_tb[NL80211_PKTPAT_PATTERN])
8386                         return -EINVAL;
8387                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8388                 mask_len = DIV_ROUND_UP(pat_len, 8);
8389                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8390                         return -EINVAL;
8391                 if (pat_len > coalesce->pattern_max_len ||
8392                     pat_len < coalesce->pattern_min_len)
8393                         return -EINVAL;
8394
8395                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8396                         pkt_offset = 0;
8397                 else
8398                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8399                 if (pkt_offset > coalesce->max_pkt_offset)
8400                         return -EINVAL;
8401                 new_rule->patterns[i].pkt_offset = pkt_offset;
8402
8403                 new_rule->patterns[i].mask =
8404                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8405                 if (!new_rule->patterns[i].mask)
8406                         return -ENOMEM;
8407                 new_rule->patterns[i].pattern =
8408                         new_rule->patterns[i].mask + mask_len;
8409                 memcpy(new_rule->patterns[i].mask,
8410                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8411                 new_rule->patterns[i].pattern_len = pat_len;
8412                 memcpy(new_rule->patterns[i].pattern,
8413                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8414                 i++;
8415         }
8416
8417         return 0;
8418 }
8419
8420 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8421 {
8422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8423         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8424         struct cfg80211_coalesce new_coalesce = {};
8425         struct cfg80211_coalesce *n_coalesce;
8426         int err, rem_rule, n_rules = 0, i, j;
8427         struct nlattr *rule;
8428         struct cfg80211_coalesce_rules *tmp_rule;
8429
8430         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8431                 return -EOPNOTSUPP;
8432
8433         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8434                 cfg80211_rdev_free_coalesce(rdev);
8435                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8436                 return 0;
8437         }
8438
8439         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8440                             rem_rule)
8441                 n_rules++;
8442         if (n_rules > coalesce->n_rules)
8443                 return -EINVAL;
8444
8445         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8446                                      GFP_KERNEL);
8447         if (!new_coalesce.rules)
8448                 return -ENOMEM;
8449
8450         new_coalesce.n_rules = n_rules;
8451         i = 0;
8452
8453         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8454                             rem_rule) {
8455                 err = nl80211_parse_coalesce_rule(rdev, rule,
8456                                                   &new_coalesce.rules[i]);
8457                 if (err)
8458                         goto error;
8459
8460                 i++;
8461         }
8462
8463         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8464         if (err)
8465                 goto error;
8466
8467         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8468         if (!n_coalesce) {
8469                 err = -ENOMEM;
8470                 goto error;
8471         }
8472         cfg80211_rdev_free_coalesce(rdev);
8473         rdev->coalesce = n_coalesce;
8474
8475         return 0;
8476 error:
8477         for (i = 0; i < new_coalesce.n_rules; i++) {
8478                 tmp_rule = &new_coalesce.rules[i];
8479                 for (j = 0; j < tmp_rule->n_patterns; j++)
8480                         kfree(tmp_rule->patterns[j].mask);
8481                 kfree(tmp_rule->patterns);
8482         }
8483         kfree(new_coalesce.rules);
8484
8485         return err;
8486 }
8487
8488 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8489 {
8490         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8491         struct net_device *dev = info->user_ptr[1];
8492         struct wireless_dev *wdev = dev->ieee80211_ptr;
8493         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8494         struct cfg80211_gtk_rekey_data rekey_data;
8495         int err;
8496
8497         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8498                 return -EINVAL;
8499
8500         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8501                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8502                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8503                         nl80211_rekey_policy);
8504         if (err)
8505                 return err;
8506
8507         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8508                 return -ERANGE;
8509         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8510                 return -ERANGE;
8511         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8512                 return -ERANGE;
8513
8514         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8515                NL80211_KEK_LEN);
8516         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8517                NL80211_KCK_LEN);
8518         memcpy(rekey_data.replay_ctr,
8519                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8520                NL80211_REPLAY_CTR_LEN);
8521
8522         wdev_lock(wdev);
8523         if (!wdev->current_bss) {
8524                 err = -ENOTCONN;
8525                 goto out;
8526         }
8527
8528         if (!rdev->ops->set_rekey_data) {
8529                 err = -EOPNOTSUPP;
8530                 goto out;
8531         }
8532
8533         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8534  out:
8535         wdev_unlock(wdev);
8536         return err;
8537 }
8538
8539 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8540                                              struct genl_info *info)
8541 {
8542         struct net_device *dev = info->user_ptr[1];
8543         struct wireless_dev *wdev = dev->ieee80211_ptr;
8544
8545         if (wdev->iftype != NL80211_IFTYPE_AP &&
8546             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8547                 return -EINVAL;
8548
8549         if (wdev->ap_unexpected_nlportid)
8550                 return -EBUSY;
8551
8552         wdev->ap_unexpected_nlportid = info->snd_portid;
8553         return 0;
8554 }
8555
8556 static int nl80211_probe_client(struct sk_buff *skb,
8557                                 struct genl_info *info)
8558 {
8559         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8560         struct net_device *dev = info->user_ptr[1];
8561         struct wireless_dev *wdev = dev->ieee80211_ptr;
8562         struct sk_buff *msg;
8563         void *hdr;
8564         const u8 *addr;
8565         u64 cookie;
8566         int err;
8567
8568         if (wdev->iftype != NL80211_IFTYPE_AP &&
8569             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8570                 return -EOPNOTSUPP;
8571
8572         if (!info->attrs[NL80211_ATTR_MAC])
8573                 return -EINVAL;
8574
8575         if (!rdev->ops->probe_client)
8576                 return -EOPNOTSUPP;
8577
8578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8579         if (!msg)
8580                 return -ENOMEM;
8581
8582         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8583                              NL80211_CMD_PROBE_CLIENT);
8584         if (!hdr) {
8585                 err = -ENOBUFS;
8586                 goto free_msg;
8587         }
8588
8589         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8590
8591         err = rdev_probe_client(rdev, dev, addr, &cookie);
8592         if (err)
8593                 goto free_msg;
8594
8595         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8596                 goto nla_put_failure;
8597
8598         genlmsg_end(msg, hdr);
8599
8600         return genlmsg_reply(msg, info);
8601
8602  nla_put_failure:
8603         err = -ENOBUFS;
8604  free_msg:
8605         nlmsg_free(msg);
8606         return err;
8607 }
8608
8609 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8610 {
8611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8612         struct cfg80211_beacon_registration *reg, *nreg;
8613         int rv;
8614
8615         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8616                 return -EOPNOTSUPP;
8617
8618         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8619         if (!nreg)
8620                 return -ENOMEM;
8621
8622         /* First, check if already registered. */
8623         spin_lock_bh(&rdev->beacon_registrations_lock);
8624         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8625                 if (reg->nlportid == info->snd_portid) {
8626                         rv = -EALREADY;
8627                         goto out_err;
8628                 }
8629         }
8630         /* Add it to the list */
8631         nreg->nlportid = info->snd_portid;
8632         list_add(&nreg->list, &rdev->beacon_registrations);
8633
8634         spin_unlock_bh(&rdev->beacon_registrations_lock);
8635
8636         return 0;
8637 out_err:
8638         spin_unlock_bh(&rdev->beacon_registrations_lock);
8639         kfree(nreg);
8640         return rv;
8641 }
8642
8643 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8644 {
8645         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8646         struct wireless_dev *wdev = info->user_ptr[1];
8647         int err;
8648
8649         if (!rdev->ops->start_p2p_device)
8650                 return -EOPNOTSUPP;
8651
8652         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8653                 return -EOPNOTSUPP;
8654
8655         if (wdev->p2p_started)
8656                 return 0;
8657
8658         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8659         if (err)
8660                 return err;
8661
8662         err = rdev_start_p2p_device(rdev, wdev);
8663         if (err)
8664                 return err;
8665
8666         wdev->p2p_started = true;
8667         rdev->opencount++;
8668
8669         return 0;
8670 }
8671
8672 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8673 {
8674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8675         struct wireless_dev *wdev = info->user_ptr[1];
8676
8677         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8678                 return -EOPNOTSUPP;
8679
8680         if (!rdev->ops->stop_p2p_device)
8681                 return -EOPNOTSUPP;
8682
8683         cfg80211_stop_p2p_device(rdev, wdev);
8684
8685         return 0;
8686 }
8687
8688 static int nl80211_get_protocol_features(struct sk_buff *skb,
8689                                          struct genl_info *info)
8690 {
8691         void *hdr;
8692         struct sk_buff *msg;
8693
8694         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8695         if (!msg)
8696                 return -ENOMEM;
8697
8698         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8699                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8700         if (!hdr)
8701                 goto nla_put_failure;
8702
8703         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8704                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8705                 goto nla_put_failure;
8706
8707         genlmsg_end(msg, hdr);
8708         return genlmsg_reply(msg, info);
8709
8710  nla_put_failure:
8711         kfree_skb(msg);
8712         return -ENOBUFS;
8713 }
8714
8715 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8716 {
8717         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8718         struct cfg80211_update_ft_ies_params ft_params;
8719         struct net_device *dev = info->user_ptr[1];
8720
8721         if (!rdev->ops->update_ft_ies)
8722                 return -EOPNOTSUPP;
8723
8724         if (!info->attrs[NL80211_ATTR_MDID] ||
8725             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8726                 return -EINVAL;
8727
8728         memset(&ft_params, 0, sizeof(ft_params));
8729         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8730         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8731         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8732
8733         return rdev_update_ft_ies(rdev, dev, &ft_params);
8734 }
8735
8736 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8737                                        struct genl_info *info)
8738 {
8739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8740         struct wireless_dev *wdev = info->user_ptr[1];
8741         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8742         u16 duration;
8743         int ret;
8744
8745         if (!rdev->ops->crit_proto_start)
8746                 return -EOPNOTSUPP;
8747
8748         if (WARN_ON(!rdev->ops->crit_proto_stop))
8749                 return -EINVAL;
8750
8751         if (rdev->crit_proto_nlportid)
8752                 return -EBUSY;
8753
8754         /* determine protocol if provided */
8755         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8756                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8757
8758         if (proto >= NUM_NL80211_CRIT_PROTO)
8759                 return -EINVAL;
8760
8761         /* timeout must be provided */
8762         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8763                 return -EINVAL;
8764
8765         duration =
8766                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8767
8768         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8769                 return -ERANGE;
8770
8771         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8772         if (!ret)
8773                 rdev->crit_proto_nlportid = info->snd_portid;
8774
8775         return ret;
8776 }
8777
8778 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8779                                       struct genl_info *info)
8780 {
8781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8782         struct wireless_dev *wdev = info->user_ptr[1];
8783
8784         if (!rdev->ops->crit_proto_stop)
8785                 return -EOPNOTSUPP;
8786
8787         if (rdev->crit_proto_nlportid) {
8788                 rdev->crit_proto_nlportid = 0;
8789                 rdev_crit_proto_stop(rdev, wdev);
8790         }
8791         return 0;
8792 }
8793
8794 #define NL80211_FLAG_NEED_WIPHY         0x01
8795 #define NL80211_FLAG_NEED_NETDEV        0x02
8796 #define NL80211_FLAG_NEED_RTNL          0x04
8797 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8798 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8799                                          NL80211_FLAG_CHECK_NETDEV_UP)
8800 #define NL80211_FLAG_NEED_WDEV          0x10
8801 /* If a netdev is associated, it must be UP, P2P must be started */
8802 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8803                                          NL80211_FLAG_CHECK_NETDEV_UP)
8804
8805 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8806                             struct genl_info *info)
8807 {
8808         struct cfg80211_registered_device *rdev;
8809         struct wireless_dev *wdev;
8810         struct net_device *dev;
8811         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8812
8813         if (rtnl)
8814                 rtnl_lock();
8815
8816         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8817                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8818                 if (IS_ERR(rdev)) {
8819                         if (rtnl)
8820                                 rtnl_unlock();
8821                         return PTR_ERR(rdev);
8822                 }
8823                 info->user_ptr[0] = rdev;
8824         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8825                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8826                 ASSERT_RTNL();
8827
8828                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8829                                                   info->attrs);
8830                 if (IS_ERR(wdev)) {
8831                         if (rtnl)
8832                                 rtnl_unlock();
8833                         return PTR_ERR(wdev);
8834                 }
8835
8836                 dev = wdev->netdev;
8837                 rdev = wiphy_to_dev(wdev->wiphy);
8838
8839                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8840                         if (!dev) {
8841                                 if (rtnl)
8842                                         rtnl_unlock();
8843                                 return -EINVAL;
8844                         }
8845
8846                         info->user_ptr[1] = dev;
8847                 } else {
8848                         info->user_ptr[1] = wdev;
8849                 }
8850
8851                 if (dev) {
8852                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8853                             !netif_running(dev)) {
8854                                 if (rtnl)
8855                                         rtnl_unlock();
8856                                 return -ENETDOWN;
8857                         }
8858
8859                         dev_hold(dev);
8860                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8861                         if (!wdev->p2p_started) {
8862                                 if (rtnl)
8863                                         rtnl_unlock();
8864                                 return -ENETDOWN;
8865                         }
8866                 }
8867
8868                 info->user_ptr[0] = rdev;
8869         }
8870
8871         return 0;
8872 }
8873
8874 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8875                               struct genl_info *info)
8876 {
8877         if (info->user_ptr[1]) {
8878                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8879                         struct wireless_dev *wdev = info->user_ptr[1];
8880
8881                         if (wdev->netdev)
8882                                 dev_put(wdev->netdev);
8883                 } else {
8884                         dev_put(info->user_ptr[1]);
8885                 }
8886         }
8887         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8888                 rtnl_unlock();
8889 }
8890
8891 static struct genl_ops nl80211_ops[] = {
8892         {
8893                 .cmd = NL80211_CMD_GET_WIPHY,
8894                 .doit = nl80211_get_wiphy,
8895                 .dumpit = nl80211_dump_wiphy,
8896                 .done = nl80211_dump_wiphy_done,
8897                 .policy = nl80211_policy,
8898                 /* can be retrieved by unprivileged users */
8899                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8900                                   NL80211_FLAG_NEED_RTNL,
8901         },
8902         {
8903                 .cmd = NL80211_CMD_SET_WIPHY,
8904                 .doit = nl80211_set_wiphy,
8905                 .policy = nl80211_policy,
8906                 .flags = GENL_ADMIN_PERM,
8907                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8908         },
8909         {
8910                 .cmd = NL80211_CMD_GET_INTERFACE,
8911                 .doit = nl80211_get_interface,
8912                 .dumpit = nl80211_dump_interface,
8913                 .policy = nl80211_policy,
8914                 /* can be retrieved by unprivileged users */
8915                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8916                                   NL80211_FLAG_NEED_RTNL,
8917         },
8918         {
8919                 .cmd = NL80211_CMD_SET_INTERFACE,
8920                 .doit = nl80211_set_interface,
8921                 .policy = nl80211_policy,
8922                 .flags = GENL_ADMIN_PERM,
8923                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8924                                   NL80211_FLAG_NEED_RTNL,
8925         },
8926         {
8927                 .cmd = NL80211_CMD_NEW_INTERFACE,
8928                 .doit = nl80211_new_interface,
8929                 .policy = nl80211_policy,
8930                 .flags = GENL_ADMIN_PERM,
8931                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8932                                   NL80211_FLAG_NEED_RTNL,
8933         },
8934         {
8935                 .cmd = NL80211_CMD_DEL_INTERFACE,
8936                 .doit = nl80211_del_interface,
8937                 .policy = nl80211_policy,
8938                 .flags = GENL_ADMIN_PERM,
8939                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8940                                   NL80211_FLAG_NEED_RTNL,
8941         },
8942         {
8943                 .cmd = NL80211_CMD_GET_KEY,
8944                 .doit = nl80211_get_key,
8945                 .policy = nl80211_policy,
8946                 .flags = GENL_ADMIN_PERM,
8947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8948                                   NL80211_FLAG_NEED_RTNL,
8949         },
8950         {
8951                 .cmd = NL80211_CMD_SET_KEY,
8952                 .doit = nl80211_set_key,
8953                 .policy = nl80211_policy,
8954                 .flags = GENL_ADMIN_PERM,
8955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8956                                   NL80211_FLAG_NEED_RTNL,
8957         },
8958         {
8959                 .cmd = NL80211_CMD_NEW_KEY,
8960                 .doit = nl80211_new_key,
8961                 .policy = nl80211_policy,
8962                 .flags = GENL_ADMIN_PERM,
8963                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8964                                   NL80211_FLAG_NEED_RTNL,
8965         },
8966         {
8967                 .cmd = NL80211_CMD_DEL_KEY,
8968                 .doit = nl80211_del_key,
8969                 .policy = nl80211_policy,
8970                 .flags = GENL_ADMIN_PERM,
8971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8972                                   NL80211_FLAG_NEED_RTNL,
8973         },
8974         {
8975                 .cmd = NL80211_CMD_SET_BEACON,
8976                 .policy = nl80211_policy,
8977                 .flags = GENL_ADMIN_PERM,
8978                 .doit = nl80211_set_beacon,
8979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8980                                   NL80211_FLAG_NEED_RTNL,
8981         },
8982         {
8983                 .cmd = NL80211_CMD_START_AP,
8984                 .policy = nl80211_policy,
8985                 .flags = GENL_ADMIN_PERM,
8986                 .doit = nl80211_start_ap,
8987                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8988                                   NL80211_FLAG_NEED_RTNL,
8989         },
8990         {
8991                 .cmd = NL80211_CMD_STOP_AP,
8992                 .policy = nl80211_policy,
8993                 .flags = GENL_ADMIN_PERM,
8994                 .doit = nl80211_stop_ap,
8995                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8996                                   NL80211_FLAG_NEED_RTNL,
8997         },
8998         {
8999                 .cmd = NL80211_CMD_GET_STATION,
9000                 .doit = nl80211_get_station,
9001                 .dumpit = nl80211_dump_station,
9002                 .policy = nl80211_policy,
9003                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9004                                   NL80211_FLAG_NEED_RTNL,
9005         },
9006         {
9007                 .cmd = NL80211_CMD_SET_STATION,
9008                 .doit = nl80211_set_station,
9009                 .policy = nl80211_policy,
9010                 .flags = GENL_ADMIN_PERM,
9011                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9012                                   NL80211_FLAG_NEED_RTNL,
9013         },
9014         {
9015                 .cmd = NL80211_CMD_NEW_STATION,
9016                 .doit = nl80211_new_station,
9017                 .policy = nl80211_policy,
9018                 .flags = GENL_ADMIN_PERM,
9019                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9020                                   NL80211_FLAG_NEED_RTNL,
9021         },
9022         {
9023                 .cmd = NL80211_CMD_DEL_STATION,
9024                 .doit = nl80211_del_station,
9025                 .policy = nl80211_policy,
9026                 .flags = GENL_ADMIN_PERM,
9027                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9028                                   NL80211_FLAG_NEED_RTNL,
9029         },
9030         {
9031                 .cmd = NL80211_CMD_GET_MPATH,
9032                 .doit = nl80211_get_mpath,
9033                 .dumpit = nl80211_dump_mpath,
9034                 .policy = nl80211_policy,
9035                 .flags = GENL_ADMIN_PERM,
9036                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9037                                   NL80211_FLAG_NEED_RTNL,
9038         },
9039         {
9040                 .cmd = NL80211_CMD_SET_MPATH,
9041                 .doit = nl80211_set_mpath,
9042                 .policy = nl80211_policy,
9043                 .flags = GENL_ADMIN_PERM,
9044                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9045                                   NL80211_FLAG_NEED_RTNL,
9046         },
9047         {
9048                 .cmd = NL80211_CMD_NEW_MPATH,
9049                 .doit = nl80211_new_mpath,
9050                 .policy = nl80211_policy,
9051                 .flags = GENL_ADMIN_PERM,
9052                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9053                                   NL80211_FLAG_NEED_RTNL,
9054         },
9055         {
9056                 .cmd = NL80211_CMD_DEL_MPATH,
9057                 .doit = nl80211_del_mpath,
9058                 .policy = nl80211_policy,
9059                 .flags = GENL_ADMIN_PERM,
9060                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9061                                   NL80211_FLAG_NEED_RTNL,
9062         },
9063         {
9064                 .cmd = NL80211_CMD_SET_BSS,
9065                 .doit = nl80211_set_bss,
9066                 .policy = nl80211_policy,
9067                 .flags = GENL_ADMIN_PERM,
9068                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9069                                   NL80211_FLAG_NEED_RTNL,
9070         },
9071         {
9072                 .cmd = NL80211_CMD_GET_REG,
9073                 .doit = nl80211_get_reg,
9074                 .policy = nl80211_policy,
9075                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9076                 /* can be retrieved by unprivileged users */
9077         },
9078         {
9079                 .cmd = NL80211_CMD_SET_REG,
9080                 .doit = nl80211_set_reg,
9081                 .policy = nl80211_policy,
9082                 .flags = GENL_ADMIN_PERM,
9083                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9084         },
9085         {
9086                 .cmd = NL80211_CMD_REQ_SET_REG,
9087                 .doit = nl80211_req_set_reg,
9088                 .policy = nl80211_policy,
9089                 .flags = GENL_ADMIN_PERM,
9090         },
9091         {
9092                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9093                 .doit = nl80211_get_mesh_config,
9094                 .policy = nl80211_policy,
9095                 /* can be retrieved by unprivileged users */
9096                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9097                                   NL80211_FLAG_NEED_RTNL,
9098         },
9099         {
9100                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9101                 .doit = nl80211_update_mesh_config,
9102                 .policy = nl80211_policy,
9103                 .flags = GENL_ADMIN_PERM,
9104                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9105                                   NL80211_FLAG_NEED_RTNL,
9106         },
9107         {
9108                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9109                 .doit = nl80211_trigger_scan,
9110                 .policy = nl80211_policy,
9111                 .flags = GENL_ADMIN_PERM,
9112                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9113                                   NL80211_FLAG_NEED_RTNL,
9114         },
9115         {
9116                 .cmd = NL80211_CMD_GET_SCAN,
9117                 .policy = nl80211_policy,
9118                 .dumpit = nl80211_dump_scan,
9119         },
9120         {
9121                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9122                 .doit = nl80211_start_sched_scan,
9123                 .policy = nl80211_policy,
9124                 .flags = GENL_ADMIN_PERM,
9125                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9126                                   NL80211_FLAG_NEED_RTNL,
9127         },
9128         {
9129                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9130                 .doit = nl80211_stop_sched_scan,
9131                 .policy = nl80211_policy,
9132                 .flags = GENL_ADMIN_PERM,
9133                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9134                                   NL80211_FLAG_NEED_RTNL,
9135         },
9136         {
9137                 .cmd = NL80211_CMD_AUTHENTICATE,
9138                 .doit = nl80211_authenticate,
9139                 .policy = nl80211_policy,
9140                 .flags = GENL_ADMIN_PERM,
9141                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9142                                   NL80211_FLAG_NEED_RTNL,
9143         },
9144         {
9145                 .cmd = NL80211_CMD_ASSOCIATE,
9146                 .doit = nl80211_associate,
9147                 .policy = nl80211_policy,
9148                 .flags = GENL_ADMIN_PERM,
9149                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9150                                   NL80211_FLAG_NEED_RTNL,
9151         },
9152         {
9153                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9154                 .doit = nl80211_deauthenticate,
9155                 .policy = nl80211_policy,
9156                 .flags = GENL_ADMIN_PERM,
9157                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9158                                   NL80211_FLAG_NEED_RTNL,
9159         },
9160         {
9161                 .cmd = NL80211_CMD_DISASSOCIATE,
9162                 .doit = nl80211_disassociate,
9163                 .policy = nl80211_policy,
9164                 .flags = GENL_ADMIN_PERM,
9165                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9166                                   NL80211_FLAG_NEED_RTNL,
9167         },
9168         {
9169                 .cmd = NL80211_CMD_JOIN_IBSS,
9170                 .doit = nl80211_join_ibss,
9171                 .policy = nl80211_policy,
9172                 .flags = GENL_ADMIN_PERM,
9173                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9174                                   NL80211_FLAG_NEED_RTNL,
9175         },
9176         {
9177                 .cmd = NL80211_CMD_LEAVE_IBSS,
9178                 .doit = nl80211_leave_ibss,
9179                 .policy = nl80211_policy,
9180                 .flags = GENL_ADMIN_PERM,
9181                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9182                                   NL80211_FLAG_NEED_RTNL,
9183         },
9184 #ifdef CONFIG_NL80211_TESTMODE
9185         {
9186                 .cmd = NL80211_CMD_TESTMODE,
9187                 .doit = nl80211_testmode_do,
9188                 .dumpit = nl80211_testmode_dump,
9189                 .policy = nl80211_policy,
9190                 .flags = GENL_ADMIN_PERM,
9191                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9192                                   NL80211_FLAG_NEED_RTNL,
9193         },
9194 #endif
9195         {
9196                 .cmd = NL80211_CMD_CONNECT,
9197                 .doit = nl80211_connect,
9198                 .policy = nl80211_policy,
9199                 .flags = GENL_ADMIN_PERM,
9200                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9201                                   NL80211_FLAG_NEED_RTNL,
9202         },
9203         {
9204                 .cmd = NL80211_CMD_DISCONNECT,
9205                 .doit = nl80211_disconnect,
9206                 .policy = nl80211_policy,
9207                 .flags = GENL_ADMIN_PERM,
9208                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9209                                   NL80211_FLAG_NEED_RTNL,
9210         },
9211         {
9212                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9213                 .doit = nl80211_wiphy_netns,
9214                 .policy = nl80211_policy,
9215                 .flags = GENL_ADMIN_PERM,
9216                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9217                                   NL80211_FLAG_NEED_RTNL,
9218         },
9219         {
9220                 .cmd = NL80211_CMD_GET_SURVEY,
9221                 .policy = nl80211_policy,
9222                 .dumpit = nl80211_dump_survey,
9223         },
9224         {
9225                 .cmd = NL80211_CMD_SET_PMKSA,
9226                 .doit = nl80211_setdel_pmksa,
9227                 .policy = nl80211_policy,
9228                 .flags = GENL_ADMIN_PERM,
9229                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9230                                   NL80211_FLAG_NEED_RTNL,
9231         },
9232         {
9233                 .cmd = NL80211_CMD_DEL_PMKSA,
9234                 .doit = nl80211_setdel_pmksa,
9235                 .policy = nl80211_policy,
9236                 .flags = GENL_ADMIN_PERM,
9237                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9238                                   NL80211_FLAG_NEED_RTNL,
9239         },
9240         {
9241                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9242                 .doit = nl80211_flush_pmksa,
9243                 .policy = nl80211_policy,
9244                 .flags = GENL_ADMIN_PERM,
9245                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9246                                   NL80211_FLAG_NEED_RTNL,
9247         },
9248         {
9249                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9250                 .doit = nl80211_remain_on_channel,
9251                 .policy = nl80211_policy,
9252                 .flags = GENL_ADMIN_PERM,
9253                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9254                                   NL80211_FLAG_NEED_RTNL,
9255         },
9256         {
9257                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9258                 .doit = nl80211_cancel_remain_on_channel,
9259                 .policy = nl80211_policy,
9260                 .flags = GENL_ADMIN_PERM,
9261                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9262                                   NL80211_FLAG_NEED_RTNL,
9263         },
9264         {
9265                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9266                 .doit = nl80211_set_tx_bitrate_mask,
9267                 .policy = nl80211_policy,
9268                 .flags = GENL_ADMIN_PERM,
9269                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9270                                   NL80211_FLAG_NEED_RTNL,
9271         },
9272         {
9273                 .cmd = NL80211_CMD_REGISTER_FRAME,
9274                 .doit = nl80211_register_mgmt,
9275                 .policy = nl80211_policy,
9276                 .flags = GENL_ADMIN_PERM,
9277                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9278                                   NL80211_FLAG_NEED_RTNL,
9279         },
9280         {
9281                 .cmd = NL80211_CMD_FRAME,
9282                 .doit = nl80211_tx_mgmt,
9283                 .policy = nl80211_policy,
9284                 .flags = GENL_ADMIN_PERM,
9285                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9286                                   NL80211_FLAG_NEED_RTNL,
9287         },
9288         {
9289                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9290                 .doit = nl80211_tx_mgmt_cancel_wait,
9291                 .policy = nl80211_policy,
9292                 .flags = GENL_ADMIN_PERM,
9293                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9294                                   NL80211_FLAG_NEED_RTNL,
9295         },
9296         {
9297                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9298                 .doit = nl80211_set_power_save,
9299                 .policy = nl80211_policy,
9300                 .flags = GENL_ADMIN_PERM,
9301                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9302                                   NL80211_FLAG_NEED_RTNL,
9303         },
9304         {
9305                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9306                 .doit = nl80211_get_power_save,
9307                 .policy = nl80211_policy,
9308                 /* can be retrieved by unprivileged users */
9309                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9310                                   NL80211_FLAG_NEED_RTNL,
9311         },
9312         {
9313                 .cmd = NL80211_CMD_SET_CQM,
9314                 .doit = nl80211_set_cqm,
9315                 .policy = nl80211_policy,
9316                 .flags = GENL_ADMIN_PERM,
9317                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9318                                   NL80211_FLAG_NEED_RTNL,
9319         },
9320         {
9321                 .cmd = NL80211_CMD_SET_CHANNEL,
9322                 .doit = nl80211_set_channel,
9323                 .policy = nl80211_policy,
9324                 .flags = GENL_ADMIN_PERM,
9325                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9326                                   NL80211_FLAG_NEED_RTNL,
9327         },
9328         {
9329                 .cmd = NL80211_CMD_SET_WDS_PEER,
9330                 .doit = nl80211_set_wds_peer,
9331                 .policy = nl80211_policy,
9332                 .flags = GENL_ADMIN_PERM,
9333                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9334                                   NL80211_FLAG_NEED_RTNL,
9335         },
9336         {
9337                 .cmd = NL80211_CMD_JOIN_MESH,
9338                 .doit = nl80211_join_mesh,
9339                 .policy = nl80211_policy,
9340                 .flags = GENL_ADMIN_PERM,
9341                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9342                                   NL80211_FLAG_NEED_RTNL,
9343         },
9344         {
9345                 .cmd = NL80211_CMD_LEAVE_MESH,
9346                 .doit = nl80211_leave_mesh,
9347                 .policy = nl80211_policy,
9348                 .flags = GENL_ADMIN_PERM,
9349                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9350                                   NL80211_FLAG_NEED_RTNL,
9351         },
9352 #ifdef CONFIG_PM
9353         {
9354                 .cmd = NL80211_CMD_GET_WOWLAN,
9355                 .doit = nl80211_get_wowlan,
9356                 .policy = nl80211_policy,
9357                 /* can be retrieved by unprivileged users */
9358                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9359                                   NL80211_FLAG_NEED_RTNL,
9360         },
9361         {
9362                 .cmd = NL80211_CMD_SET_WOWLAN,
9363                 .doit = nl80211_set_wowlan,
9364                 .policy = nl80211_policy,
9365                 .flags = GENL_ADMIN_PERM,
9366                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9367                                   NL80211_FLAG_NEED_RTNL,
9368         },
9369 #endif
9370         {
9371                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9372                 .doit = nl80211_set_rekey_data,
9373                 .policy = nl80211_policy,
9374                 .flags = GENL_ADMIN_PERM,
9375                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9376                                   NL80211_FLAG_NEED_RTNL,
9377         },
9378         {
9379                 .cmd = NL80211_CMD_TDLS_MGMT,
9380                 .doit = nl80211_tdls_mgmt,
9381                 .policy = nl80211_policy,
9382                 .flags = GENL_ADMIN_PERM,
9383                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9384                                   NL80211_FLAG_NEED_RTNL,
9385         },
9386         {
9387                 .cmd = NL80211_CMD_TDLS_OPER,
9388                 .doit = nl80211_tdls_oper,
9389                 .policy = nl80211_policy,
9390                 .flags = GENL_ADMIN_PERM,
9391                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9392                                   NL80211_FLAG_NEED_RTNL,
9393         },
9394         {
9395                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9396                 .doit = nl80211_register_unexpected_frame,
9397                 .policy = nl80211_policy,
9398                 .flags = GENL_ADMIN_PERM,
9399                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9400                                   NL80211_FLAG_NEED_RTNL,
9401         },
9402         {
9403                 .cmd = NL80211_CMD_PROBE_CLIENT,
9404                 .doit = nl80211_probe_client,
9405                 .policy = nl80211_policy,
9406                 .flags = GENL_ADMIN_PERM,
9407                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9408                                   NL80211_FLAG_NEED_RTNL,
9409         },
9410         {
9411                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9412                 .doit = nl80211_register_beacons,
9413                 .policy = nl80211_policy,
9414                 .flags = GENL_ADMIN_PERM,
9415                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9416                                   NL80211_FLAG_NEED_RTNL,
9417         },
9418         {
9419                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9420                 .doit = nl80211_set_noack_map,
9421                 .policy = nl80211_policy,
9422                 .flags = GENL_ADMIN_PERM,
9423                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9424                                   NL80211_FLAG_NEED_RTNL,
9425         },
9426         {
9427                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9428                 .doit = nl80211_start_p2p_device,
9429                 .policy = nl80211_policy,
9430                 .flags = GENL_ADMIN_PERM,
9431                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9432                                   NL80211_FLAG_NEED_RTNL,
9433         },
9434         {
9435                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9436                 .doit = nl80211_stop_p2p_device,
9437                 .policy = nl80211_policy,
9438                 .flags = GENL_ADMIN_PERM,
9439                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9440                                   NL80211_FLAG_NEED_RTNL,
9441         },
9442         {
9443                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9444                 .doit = nl80211_set_mcast_rate,
9445                 .policy = nl80211_policy,
9446                 .flags = GENL_ADMIN_PERM,
9447                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9448                                   NL80211_FLAG_NEED_RTNL,
9449         },
9450         {
9451                 .cmd = NL80211_CMD_SET_MAC_ACL,
9452                 .doit = nl80211_set_mac_acl,
9453                 .policy = nl80211_policy,
9454                 .flags = GENL_ADMIN_PERM,
9455                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9456                                   NL80211_FLAG_NEED_RTNL,
9457         },
9458         {
9459                 .cmd = NL80211_CMD_RADAR_DETECT,
9460                 .doit = nl80211_start_radar_detection,
9461                 .policy = nl80211_policy,
9462                 .flags = GENL_ADMIN_PERM,
9463                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9464                                   NL80211_FLAG_NEED_RTNL,
9465         },
9466         {
9467                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9468                 .doit = nl80211_get_protocol_features,
9469                 .policy = nl80211_policy,
9470         },
9471         {
9472                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9473                 .doit = nl80211_update_ft_ies,
9474                 .policy = nl80211_policy,
9475                 .flags = GENL_ADMIN_PERM,
9476                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9477                                   NL80211_FLAG_NEED_RTNL,
9478         },
9479         {
9480                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9481                 .doit = nl80211_crit_protocol_start,
9482                 .policy = nl80211_policy,
9483                 .flags = GENL_ADMIN_PERM,
9484                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9485                                   NL80211_FLAG_NEED_RTNL,
9486         },
9487         {
9488                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9489                 .doit = nl80211_crit_protocol_stop,
9490                 .policy = nl80211_policy,
9491                 .flags = GENL_ADMIN_PERM,
9492                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9493                                   NL80211_FLAG_NEED_RTNL,
9494         },
9495         {
9496                 .cmd = NL80211_CMD_GET_COALESCE,
9497                 .doit = nl80211_get_coalesce,
9498                 .policy = nl80211_policy,
9499                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9500                                   NL80211_FLAG_NEED_RTNL,
9501         },
9502         {
9503                 .cmd = NL80211_CMD_SET_COALESCE,
9504                 .doit = nl80211_set_coalesce,
9505                 .policy = nl80211_policy,
9506                 .flags = GENL_ADMIN_PERM,
9507                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9508                                   NL80211_FLAG_NEED_RTNL,
9509         },
9510         {
9511                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9512                 .doit = nl80211_channel_switch,
9513                 .policy = nl80211_policy,
9514                 .flags = GENL_ADMIN_PERM,
9515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9516                                   NL80211_FLAG_NEED_RTNL,
9517         },
9518 };
9519
9520 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9521         .name = "mlme",
9522 };
9523
9524 /* multicast groups */
9525 static struct genl_multicast_group nl80211_config_mcgrp = {
9526         .name = "config",
9527 };
9528 static struct genl_multicast_group nl80211_scan_mcgrp = {
9529         .name = "scan",
9530 };
9531 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9532         .name = "regulatory",
9533 };
9534
9535 /* notification functions */
9536
9537 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9538 {
9539         struct sk_buff *msg;
9540         struct nl80211_dump_wiphy_state state = {};
9541
9542         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9543         if (!msg)
9544                 return;
9545
9546         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9547                 nlmsg_free(msg);
9548                 return;
9549         }
9550
9551         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9552                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9553 }
9554
9555 static int nl80211_add_scan_req(struct sk_buff *msg,
9556                                 struct cfg80211_registered_device *rdev)
9557 {
9558         struct cfg80211_scan_request *req = rdev->scan_req;
9559         struct nlattr *nest;
9560         int i;
9561
9562         if (WARN_ON(!req))
9563                 return 0;
9564
9565         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9566         if (!nest)
9567                 goto nla_put_failure;
9568         for (i = 0; i < req->n_ssids; i++) {
9569                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9570                         goto nla_put_failure;
9571         }
9572         nla_nest_end(msg, nest);
9573
9574         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9575         if (!nest)
9576                 goto nla_put_failure;
9577         for (i = 0; i < req->n_channels; i++) {
9578                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9579                         goto nla_put_failure;
9580         }
9581         nla_nest_end(msg, nest);
9582
9583         if (req->ie &&
9584             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9585                 goto nla_put_failure;
9586
9587         if (req->flags)
9588                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9589
9590         return 0;
9591  nla_put_failure:
9592         return -ENOBUFS;
9593 }
9594
9595 static int nl80211_send_scan_msg(struct sk_buff *msg,
9596                                  struct cfg80211_registered_device *rdev,
9597                                  struct wireless_dev *wdev,
9598                                  u32 portid, u32 seq, int flags,
9599                                  u32 cmd)
9600 {
9601         void *hdr;
9602
9603         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9604         if (!hdr)
9605                 return -1;
9606
9607         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9608             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9609                                          wdev->netdev->ifindex)) ||
9610             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9611                 goto nla_put_failure;
9612
9613         /* ignore errors and send incomplete event anyway */
9614         nl80211_add_scan_req(msg, rdev);
9615
9616         return genlmsg_end(msg, hdr);
9617
9618  nla_put_failure:
9619         genlmsg_cancel(msg, hdr);
9620         return -EMSGSIZE;
9621 }
9622
9623 static int
9624 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9625                             struct cfg80211_registered_device *rdev,
9626                             struct net_device *netdev,
9627                             u32 portid, u32 seq, int flags, u32 cmd)
9628 {
9629         void *hdr;
9630
9631         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9632         if (!hdr)
9633                 return -1;
9634
9635         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9636             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9637                 goto nla_put_failure;
9638
9639         return genlmsg_end(msg, hdr);
9640
9641  nla_put_failure:
9642         genlmsg_cancel(msg, hdr);
9643         return -EMSGSIZE;
9644 }
9645
9646 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9647                              struct wireless_dev *wdev)
9648 {
9649         struct sk_buff *msg;
9650
9651         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9652         if (!msg)
9653                 return;
9654
9655         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9656                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9657                 nlmsg_free(msg);
9658                 return;
9659         }
9660
9661         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9662                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9663 }
9664
9665 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9666                             struct wireless_dev *wdev)
9667 {
9668         struct sk_buff *msg;
9669
9670         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9671         if (!msg)
9672                 return;
9673
9674         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9675                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9676                 nlmsg_free(msg);
9677                 return;
9678         }
9679
9680         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9681                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9682 }
9683
9684 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9685                                struct wireless_dev *wdev)
9686 {
9687         struct sk_buff *msg;
9688
9689         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9690         if (!msg)
9691                 return;
9692
9693         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9694                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9695                 nlmsg_free(msg);
9696                 return;
9697         }
9698
9699         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9700                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9701 }
9702
9703 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9704                                      struct net_device *netdev)
9705 {
9706         struct sk_buff *msg;
9707
9708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9709         if (!msg)
9710                 return;
9711
9712         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9713                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9714                 nlmsg_free(msg);
9715                 return;
9716         }
9717
9718         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9719                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9720 }
9721
9722 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9723                              struct net_device *netdev, u32 cmd)
9724 {
9725         struct sk_buff *msg;
9726
9727         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9728         if (!msg)
9729                 return;
9730
9731         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9732                 nlmsg_free(msg);
9733                 return;
9734         }
9735
9736         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9737                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9738 }
9739
9740 /*
9741  * This can happen on global regulatory changes or device specific settings
9742  * based on custom world regulatory domains.
9743  */
9744 void nl80211_send_reg_change_event(struct regulatory_request *request)
9745 {
9746         struct sk_buff *msg;
9747         void *hdr;
9748
9749         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9750         if (!msg)
9751                 return;
9752
9753         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9754         if (!hdr) {
9755                 nlmsg_free(msg);
9756                 return;
9757         }
9758
9759         /* Userspace can always count this one always being set */
9760         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9761                 goto nla_put_failure;
9762
9763         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9764                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9765                                NL80211_REGDOM_TYPE_WORLD))
9766                         goto nla_put_failure;
9767         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9768                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9769                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9770                         goto nla_put_failure;
9771         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9772                    request->intersect) {
9773                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9774                                NL80211_REGDOM_TYPE_INTERSECTION))
9775                         goto nla_put_failure;
9776         } else {
9777                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9778                                NL80211_REGDOM_TYPE_COUNTRY) ||
9779                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9780                                    request->alpha2))
9781                         goto nla_put_failure;
9782         }
9783
9784         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9785             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9786                 goto nla_put_failure;
9787
9788         genlmsg_end(msg, hdr);
9789
9790         rcu_read_lock();
9791         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9792                                 GFP_ATOMIC);
9793         rcu_read_unlock();
9794
9795         return;
9796
9797 nla_put_failure:
9798         genlmsg_cancel(msg, hdr);
9799         nlmsg_free(msg);
9800 }
9801
9802 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9803                                     struct net_device *netdev,
9804                                     const u8 *buf, size_t len,
9805                                     enum nl80211_commands cmd, gfp_t gfp)
9806 {
9807         struct sk_buff *msg;
9808         void *hdr;
9809
9810         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9811         if (!msg)
9812                 return;
9813
9814         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9815         if (!hdr) {
9816                 nlmsg_free(msg);
9817                 return;
9818         }
9819
9820         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9821             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9822             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9823                 goto nla_put_failure;
9824
9825         genlmsg_end(msg, hdr);
9826
9827         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9828                                 nl80211_mlme_mcgrp.id, gfp);
9829         return;
9830
9831  nla_put_failure:
9832         genlmsg_cancel(msg, hdr);
9833         nlmsg_free(msg);
9834 }
9835
9836 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9837                           struct net_device *netdev, const u8 *buf,
9838                           size_t len, gfp_t gfp)
9839 {
9840         nl80211_send_mlme_event(rdev, netdev, buf, len,
9841                                 NL80211_CMD_AUTHENTICATE, gfp);
9842 }
9843
9844 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9845                            struct net_device *netdev, const u8 *buf,
9846                            size_t len, gfp_t gfp)
9847 {
9848         nl80211_send_mlme_event(rdev, netdev, buf, len,
9849                                 NL80211_CMD_ASSOCIATE, gfp);
9850 }
9851
9852 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9853                          struct net_device *netdev, const u8 *buf,
9854                          size_t len, gfp_t gfp)
9855 {
9856         nl80211_send_mlme_event(rdev, netdev, buf, len,
9857                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9858 }
9859
9860 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9861                            struct net_device *netdev, const u8 *buf,
9862                            size_t len, gfp_t gfp)
9863 {
9864         nl80211_send_mlme_event(rdev, netdev, buf, len,
9865                                 NL80211_CMD_DISASSOCIATE, gfp);
9866 }
9867
9868 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9869                                   size_t len)
9870 {
9871         struct wireless_dev *wdev = dev->ieee80211_ptr;
9872         struct wiphy *wiphy = wdev->wiphy;
9873         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9874         const struct ieee80211_mgmt *mgmt = (void *)buf;
9875         u32 cmd;
9876
9877         if (WARN_ON(len < 2))
9878                 return;
9879
9880         if (ieee80211_is_deauth(mgmt->frame_control))
9881                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9882         else
9883                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9884
9885         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9886         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9887 }
9888 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9889
9890 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9891                                       struct net_device *netdev, int cmd,
9892                                       const u8 *addr, gfp_t gfp)
9893 {
9894         struct sk_buff *msg;
9895         void *hdr;
9896
9897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9898         if (!msg)
9899                 return;
9900
9901         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9902         if (!hdr) {
9903                 nlmsg_free(msg);
9904                 return;
9905         }
9906
9907         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9908             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9909             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9910             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9911                 goto nla_put_failure;
9912
9913         genlmsg_end(msg, hdr);
9914
9915         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9916                                 nl80211_mlme_mcgrp.id, gfp);
9917         return;
9918
9919  nla_put_failure:
9920         genlmsg_cancel(msg, hdr);
9921         nlmsg_free(msg);
9922 }
9923
9924 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9925                                struct net_device *netdev, const u8 *addr,
9926                                gfp_t gfp)
9927 {
9928         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9929                                   addr, gfp);
9930 }
9931
9932 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9933                                 struct net_device *netdev, const u8 *addr,
9934                                 gfp_t gfp)
9935 {
9936         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9937                                   addr, gfp);
9938 }
9939
9940 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9941                                  struct net_device *netdev, const u8 *bssid,
9942                                  const u8 *req_ie, size_t req_ie_len,
9943                                  const u8 *resp_ie, size_t resp_ie_len,
9944                                  u16 status, gfp_t gfp)
9945 {
9946         struct sk_buff *msg;
9947         void *hdr;
9948
9949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9950         if (!msg)
9951                 return;
9952
9953         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9954         if (!hdr) {
9955                 nlmsg_free(msg);
9956                 return;
9957         }
9958
9959         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9960             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9961             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9962             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9963             (req_ie &&
9964              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9965             (resp_ie &&
9966              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9967                 goto nla_put_failure;
9968
9969         genlmsg_end(msg, hdr);
9970
9971         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9972                                 nl80211_mlme_mcgrp.id, gfp);
9973         return;
9974
9975  nla_put_failure:
9976         genlmsg_cancel(msg, hdr);
9977         nlmsg_free(msg);
9978
9979 }
9980
9981 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9982                          struct net_device *netdev, const u8 *bssid,
9983                          const u8 *req_ie, size_t req_ie_len,
9984                          const u8 *resp_ie, size_t resp_ie_len, 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, NL80211_CMD_ROAM);
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_MAC, ETH_ALEN, bssid) ||
10002             (req_ie &&
10003              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10004             (resp_ie &&
10005              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10006                 goto nla_put_failure;
10007
10008         genlmsg_end(msg, hdr);
10009
10010         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10011                                 nl80211_mlme_mcgrp.id, gfp);
10012         return;
10013
10014  nla_put_failure:
10015         genlmsg_cancel(msg, hdr);
10016         nlmsg_free(msg);
10017
10018 }
10019
10020 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10021                                struct net_device *netdev, u16 reason,
10022                                const u8 *ie, size_t ie_len, bool from_ap)
10023 {
10024         struct sk_buff *msg;
10025         void *hdr;
10026
10027         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10028         if (!msg)
10029                 return;
10030
10031         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10032         if (!hdr) {
10033                 nlmsg_free(msg);
10034                 return;
10035         }
10036
10037         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10038             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10039             (from_ap && reason &&
10040              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10041             (from_ap &&
10042              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10043             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10044                 goto nla_put_failure;
10045
10046         genlmsg_end(msg, hdr);
10047
10048         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10049                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10050         return;
10051
10052  nla_put_failure:
10053         genlmsg_cancel(msg, hdr);
10054         nlmsg_free(msg);
10055
10056 }
10057
10058 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10059                              struct net_device *netdev, const u8 *bssid,
10060                              gfp_t gfp)
10061 {
10062         struct sk_buff *msg;
10063         void *hdr;
10064
10065         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10066         if (!msg)
10067                 return;
10068
10069         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10070         if (!hdr) {
10071                 nlmsg_free(msg);
10072                 return;
10073         }
10074
10075         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10076             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10077             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10078                 goto nla_put_failure;
10079
10080         genlmsg_end(msg, hdr);
10081
10082         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10083                                 nl80211_mlme_mcgrp.id, gfp);
10084         return;
10085
10086  nla_put_failure:
10087         genlmsg_cancel(msg, hdr);
10088         nlmsg_free(msg);
10089 }
10090
10091 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10092                                         const u8* ie, u8 ie_len, gfp_t gfp)
10093 {
10094         struct wireless_dev *wdev = dev->ieee80211_ptr;
10095         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10096         struct sk_buff *msg;
10097         void *hdr;
10098
10099         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10100                 return;
10101
10102         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10103
10104         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10105         if (!msg)
10106                 return;
10107
10108         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10109         if (!hdr) {
10110                 nlmsg_free(msg);
10111                 return;
10112         }
10113
10114         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10115             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10116             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10117             (ie_len && ie &&
10118              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10119                 goto nla_put_failure;
10120
10121         genlmsg_end(msg, hdr);
10122
10123         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10124                                 nl80211_mlme_mcgrp.id, gfp);
10125         return;
10126
10127  nla_put_failure:
10128         genlmsg_cancel(msg, hdr);
10129         nlmsg_free(msg);
10130 }
10131 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10132
10133 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10134                                  struct net_device *netdev, const u8 *addr,
10135                                  enum nl80211_key_type key_type, int key_id,
10136                                  const u8 *tsc, gfp_t gfp)
10137 {
10138         struct sk_buff *msg;
10139         void *hdr;
10140
10141         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10142         if (!msg)
10143                 return;
10144
10145         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10146         if (!hdr) {
10147                 nlmsg_free(msg);
10148                 return;
10149         }
10150
10151         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10152             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10153             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10154             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10155             (key_id != -1 &&
10156              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10157             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10158                 goto nla_put_failure;
10159
10160         genlmsg_end(msg, hdr);
10161
10162         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10163                                 nl80211_mlme_mcgrp.id, gfp);
10164         return;
10165
10166  nla_put_failure:
10167         genlmsg_cancel(msg, hdr);
10168         nlmsg_free(msg);
10169 }
10170
10171 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10172                                     struct ieee80211_channel *channel_before,
10173                                     struct ieee80211_channel *channel_after)
10174 {
10175         struct sk_buff *msg;
10176         void *hdr;
10177         struct nlattr *nl_freq;
10178
10179         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10180         if (!msg)
10181                 return;
10182
10183         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10184         if (!hdr) {
10185                 nlmsg_free(msg);
10186                 return;
10187         }
10188
10189         /*
10190          * Since we are applying the beacon hint to a wiphy we know its
10191          * wiphy_idx is valid
10192          */
10193         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10194                 goto nla_put_failure;
10195
10196         /* Before */
10197         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10198         if (!nl_freq)
10199                 goto nla_put_failure;
10200         if (nl80211_msg_put_channel(msg, channel_before, false))
10201                 goto nla_put_failure;
10202         nla_nest_end(msg, nl_freq);
10203
10204         /* After */
10205         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10206         if (!nl_freq)
10207                 goto nla_put_failure;
10208         if (nl80211_msg_put_channel(msg, channel_after, false))
10209                 goto nla_put_failure;
10210         nla_nest_end(msg, nl_freq);
10211
10212         genlmsg_end(msg, hdr);
10213
10214         rcu_read_lock();
10215         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
10216                                 GFP_ATOMIC);
10217         rcu_read_unlock();
10218
10219         return;
10220
10221 nla_put_failure:
10222         genlmsg_cancel(msg, hdr);
10223         nlmsg_free(msg);
10224 }
10225
10226 static void nl80211_send_remain_on_chan_event(
10227         int cmd, struct cfg80211_registered_device *rdev,
10228         struct wireless_dev *wdev, u64 cookie,
10229         struct ieee80211_channel *chan,
10230         unsigned int duration, gfp_t gfp)
10231 {
10232         struct sk_buff *msg;
10233         void *hdr;
10234
10235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10236         if (!msg)
10237                 return;
10238
10239         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10240         if (!hdr) {
10241                 nlmsg_free(msg);
10242                 return;
10243         }
10244
10245         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10246             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10247                                          wdev->netdev->ifindex)) ||
10248             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10249             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10250             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10251                         NL80211_CHAN_NO_HT) ||
10252             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10253                 goto nla_put_failure;
10254
10255         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10256             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
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_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10271                                struct ieee80211_channel *chan,
10272                                unsigned int duration, gfp_t gfp)
10273 {
10274         struct wiphy *wiphy = wdev->wiphy;
10275         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10276
10277         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10278         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10279                                           rdev, wdev, cookie, chan,
10280                                           duration, gfp);
10281 }
10282 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10283
10284 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10285                                         struct ieee80211_channel *chan,
10286                                         gfp_t gfp)
10287 {
10288         struct wiphy *wiphy = wdev->wiphy;
10289         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10290
10291         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10292         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10293                                           rdev, wdev, cookie, chan, 0, gfp);
10294 }
10295 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10296
10297 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10298                       struct station_info *sinfo, gfp_t gfp)
10299 {
10300         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10301         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10302         struct sk_buff *msg;
10303
10304         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10305
10306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10307         if (!msg)
10308                 return;
10309
10310         if (nl80211_send_station(msg, 0, 0, 0,
10311                                  rdev, dev, mac_addr, sinfo) < 0) {
10312                 nlmsg_free(msg);
10313                 return;
10314         }
10315
10316         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10317                                 nl80211_mlme_mcgrp.id, gfp);
10318 }
10319 EXPORT_SYMBOL(cfg80211_new_sta);
10320
10321 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10322 {
10323         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10324         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10325         struct sk_buff *msg;
10326         void *hdr;
10327
10328         trace_cfg80211_del_sta(dev, mac_addr);
10329
10330         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10331         if (!msg)
10332                 return;
10333
10334         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10335         if (!hdr) {
10336                 nlmsg_free(msg);
10337                 return;
10338         }
10339
10340         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10341             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10342                 goto nla_put_failure;
10343
10344         genlmsg_end(msg, hdr);
10345
10346         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10347                                 nl80211_mlme_mcgrp.id, gfp);
10348         return;
10349
10350  nla_put_failure:
10351         genlmsg_cancel(msg, hdr);
10352         nlmsg_free(msg);
10353 }
10354 EXPORT_SYMBOL(cfg80211_del_sta);
10355
10356 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10357                           enum nl80211_connect_failed_reason reason,
10358                           gfp_t gfp)
10359 {
10360         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10361         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10362         struct sk_buff *msg;
10363         void *hdr;
10364
10365         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10366         if (!msg)
10367                 return;
10368
10369         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10370         if (!hdr) {
10371                 nlmsg_free(msg);
10372                 return;
10373         }
10374
10375         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10376             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10377             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10378                 goto nla_put_failure;
10379
10380         genlmsg_end(msg, hdr);
10381
10382         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10383                                 nl80211_mlme_mcgrp.id, gfp);
10384         return;
10385
10386  nla_put_failure:
10387         genlmsg_cancel(msg, hdr);
10388         nlmsg_free(msg);
10389 }
10390 EXPORT_SYMBOL(cfg80211_conn_failed);
10391
10392 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10393                                        const u8 *addr, gfp_t gfp)
10394 {
10395         struct wireless_dev *wdev = dev->ieee80211_ptr;
10396         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10397         struct sk_buff *msg;
10398         void *hdr;
10399         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10400
10401         if (!nlportid)
10402                 return false;
10403
10404         msg = nlmsg_new(100, gfp);
10405         if (!msg)
10406                 return true;
10407
10408         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10409         if (!hdr) {
10410                 nlmsg_free(msg);
10411                 return true;
10412         }
10413
10414         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10415             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10416             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10417                 goto nla_put_failure;
10418
10419         genlmsg_end(msg, hdr);
10420         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10421         return true;
10422
10423  nla_put_failure:
10424         genlmsg_cancel(msg, hdr);
10425         nlmsg_free(msg);
10426         return true;
10427 }
10428
10429 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10430                                 const u8 *addr, gfp_t gfp)
10431 {
10432         struct wireless_dev *wdev = dev->ieee80211_ptr;
10433         bool ret;
10434
10435         trace_cfg80211_rx_spurious_frame(dev, addr);
10436
10437         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10438                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10439                 trace_cfg80211_return_bool(false);
10440                 return false;
10441         }
10442         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10443                                          addr, gfp);
10444         trace_cfg80211_return_bool(ret);
10445         return ret;
10446 }
10447 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10448
10449 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10450                                         const u8 *addr, gfp_t gfp)
10451 {
10452         struct wireless_dev *wdev = dev->ieee80211_ptr;
10453         bool ret;
10454
10455         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10456
10457         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10458                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10459                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10460                 trace_cfg80211_return_bool(false);
10461                 return false;
10462         }
10463         ret = __nl80211_unexpected_frame(dev,
10464                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10465                                          addr, gfp);
10466         trace_cfg80211_return_bool(ret);
10467         return ret;
10468 }
10469 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10470
10471 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10472                       struct wireless_dev *wdev, u32 nlportid,
10473                       int freq, int sig_dbm,
10474                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10475 {
10476         struct net_device *netdev = wdev->netdev;
10477         struct sk_buff *msg;
10478         void *hdr;
10479
10480         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10481         if (!msg)
10482                 return -ENOMEM;
10483
10484         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10485         if (!hdr) {
10486                 nlmsg_free(msg);
10487                 return -ENOMEM;
10488         }
10489
10490         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10491             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10492                                         netdev->ifindex)) ||
10493             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10494             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10495             (sig_dbm &&
10496              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10497             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10498             (flags &&
10499              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10500                 goto nla_put_failure;
10501
10502         genlmsg_end(msg, hdr);
10503
10504         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10505
10506  nla_put_failure:
10507         genlmsg_cancel(msg, hdr);
10508         nlmsg_free(msg);
10509         return -ENOBUFS;
10510 }
10511
10512 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10513                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10514 {
10515         struct wiphy *wiphy = wdev->wiphy;
10516         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10517         struct net_device *netdev = wdev->netdev;
10518         struct sk_buff *msg;
10519         void *hdr;
10520
10521         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10522
10523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10524         if (!msg)
10525                 return;
10526
10527         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10528         if (!hdr) {
10529                 nlmsg_free(msg);
10530                 return;
10531         }
10532
10533         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10534             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10535                                    netdev->ifindex)) ||
10536             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10537             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10538             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10539             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10540                 goto nla_put_failure;
10541
10542         genlmsg_end(msg, hdr);
10543
10544         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10545                                 nl80211_mlme_mcgrp.id, gfp);
10546         return;
10547
10548  nla_put_failure:
10549         genlmsg_cancel(msg, hdr);
10550         nlmsg_free(msg);
10551 }
10552 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10553
10554 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10555                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10556                               gfp_t gfp)
10557 {
10558         struct wireless_dev *wdev = dev->ieee80211_ptr;
10559         struct wiphy *wiphy = wdev->wiphy;
10560         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10561         struct sk_buff *msg;
10562         struct nlattr *pinfoattr;
10563         void *hdr;
10564
10565         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10566
10567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10568         if (!msg)
10569                 return;
10570
10571         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10572         if (!hdr) {
10573                 nlmsg_free(msg);
10574                 return;
10575         }
10576
10577         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10578             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10579                 goto nla_put_failure;
10580
10581         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10582         if (!pinfoattr)
10583                 goto nla_put_failure;
10584
10585         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10586                         rssi_event))
10587                 goto nla_put_failure;
10588
10589         nla_nest_end(msg, pinfoattr);
10590
10591         genlmsg_end(msg, hdr);
10592
10593         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10594                                 nl80211_mlme_mcgrp.id, gfp);
10595         return;
10596
10597  nla_put_failure:
10598         genlmsg_cancel(msg, hdr);
10599         nlmsg_free(msg);
10600 }
10601 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10602
10603 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10604                                      struct net_device *netdev, const u8 *bssid,
10605                                      const u8 *replay_ctr, gfp_t gfp)
10606 {
10607         struct sk_buff *msg;
10608         struct nlattr *rekey_attr;
10609         void *hdr;
10610
10611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10612         if (!msg)
10613                 return;
10614
10615         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10616         if (!hdr) {
10617                 nlmsg_free(msg);
10618                 return;
10619         }
10620
10621         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10622             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10623             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10624                 goto nla_put_failure;
10625
10626         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10627         if (!rekey_attr)
10628                 goto nla_put_failure;
10629
10630         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10631                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10632                 goto nla_put_failure;
10633
10634         nla_nest_end(msg, rekey_attr);
10635
10636         genlmsg_end(msg, hdr);
10637
10638         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10639                                 nl80211_mlme_mcgrp.id, gfp);
10640         return;
10641
10642  nla_put_failure:
10643         genlmsg_cancel(msg, hdr);
10644         nlmsg_free(msg);
10645 }
10646
10647 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10648                                const u8 *replay_ctr, gfp_t gfp)
10649 {
10650         struct wireless_dev *wdev = dev->ieee80211_ptr;
10651         struct wiphy *wiphy = wdev->wiphy;
10652         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10653
10654         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10655         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10656 }
10657 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10658
10659 static void
10660 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10661                                struct net_device *netdev, int index,
10662                                const u8 *bssid, bool preauth, gfp_t gfp)
10663 {
10664         struct sk_buff *msg;
10665         struct nlattr *attr;
10666         void *hdr;
10667
10668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10669         if (!msg)
10670                 return;
10671
10672         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10673         if (!hdr) {
10674                 nlmsg_free(msg);
10675                 return;
10676         }
10677
10678         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10679             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10680                 goto nla_put_failure;
10681
10682         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10683         if (!attr)
10684                 goto nla_put_failure;
10685
10686         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10687             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10688             (preauth &&
10689              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10690                 goto nla_put_failure;
10691
10692         nla_nest_end(msg, attr);
10693
10694         genlmsg_end(msg, hdr);
10695
10696         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10697                                 nl80211_mlme_mcgrp.id, gfp);
10698         return;
10699
10700  nla_put_failure:
10701         genlmsg_cancel(msg, hdr);
10702         nlmsg_free(msg);
10703 }
10704
10705 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10706                                      const u8 *bssid, bool preauth, gfp_t gfp)
10707 {
10708         struct wireless_dev *wdev = dev->ieee80211_ptr;
10709         struct wiphy *wiphy = wdev->wiphy;
10710         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10711
10712         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10713         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10714 }
10715 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10716
10717 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10718                                      struct net_device *netdev,
10719                                      struct cfg80211_chan_def *chandef,
10720                                      gfp_t gfp)
10721 {
10722         struct sk_buff *msg;
10723         void *hdr;
10724
10725         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10726         if (!msg)
10727                 return;
10728
10729         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10730         if (!hdr) {
10731                 nlmsg_free(msg);
10732                 return;
10733         }
10734
10735         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10736                 goto nla_put_failure;
10737
10738         if (nl80211_send_chandef(msg, chandef))
10739                 goto nla_put_failure;
10740
10741         genlmsg_end(msg, hdr);
10742
10743         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10744                                 nl80211_mlme_mcgrp.id, gfp);
10745         return;
10746
10747  nla_put_failure:
10748         genlmsg_cancel(msg, hdr);
10749         nlmsg_free(msg);
10750 }
10751
10752 void cfg80211_ch_switch_notify(struct net_device *dev,
10753                                struct cfg80211_chan_def *chandef)
10754 {
10755         struct wireless_dev *wdev = dev->ieee80211_ptr;
10756         struct wiphy *wiphy = wdev->wiphy;
10757         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10758
10759         trace_cfg80211_ch_switch_notify(dev, chandef);
10760
10761         wdev_lock(wdev);
10762
10763         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10764                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10765                     wdev->iftype != NL80211_IFTYPE_ADHOC))
10766                 goto out;
10767
10768         wdev->channel = chandef->chan;
10769         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10770 out:
10771         wdev_unlock(wdev);
10772         return;
10773 }
10774 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10775
10776 void cfg80211_cqm_txe_notify(struct net_device *dev,
10777                              const u8 *peer, u32 num_packets,
10778                              u32 rate, u32 intvl, gfp_t gfp)
10779 {
10780         struct wireless_dev *wdev = dev->ieee80211_ptr;
10781         struct wiphy *wiphy = wdev->wiphy;
10782         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10783         struct sk_buff *msg;
10784         struct nlattr *pinfoattr;
10785         void *hdr;
10786
10787         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10788         if (!msg)
10789                 return;
10790
10791         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10792         if (!hdr) {
10793                 nlmsg_free(msg);
10794                 return;
10795         }
10796
10797         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10798             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10799             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10800                 goto nla_put_failure;
10801
10802         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10803         if (!pinfoattr)
10804                 goto nla_put_failure;
10805
10806         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10807                 goto nla_put_failure;
10808
10809         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10810                 goto nla_put_failure;
10811
10812         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10813                 goto nla_put_failure;
10814
10815         nla_nest_end(msg, pinfoattr);
10816
10817         genlmsg_end(msg, hdr);
10818
10819         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10820                                 nl80211_mlme_mcgrp.id, gfp);
10821         return;
10822
10823  nla_put_failure:
10824         genlmsg_cancel(msg, hdr);
10825         nlmsg_free(msg);
10826 }
10827 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10828
10829 void
10830 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10831                      struct cfg80211_chan_def *chandef,
10832                      enum nl80211_radar_event event,
10833                      struct net_device *netdev, gfp_t gfp)
10834 {
10835         struct sk_buff *msg;
10836         void *hdr;
10837
10838         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10839         if (!msg)
10840                 return;
10841
10842         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10843         if (!hdr) {
10844                 nlmsg_free(msg);
10845                 return;
10846         }
10847
10848         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10849                 goto nla_put_failure;
10850
10851         /* NOP and radar events don't need a netdev parameter */
10852         if (netdev) {
10853                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10854
10855                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10856                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10857                         goto nla_put_failure;
10858         }
10859
10860         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10861                 goto nla_put_failure;
10862
10863         if (nl80211_send_chandef(msg, chandef))
10864                 goto nla_put_failure;
10865
10866         genlmsg_end(msg, hdr);
10867
10868         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10869                                 nl80211_mlme_mcgrp.id, gfp);
10870         return;
10871
10872  nla_put_failure:
10873         genlmsg_cancel(msg, hdr);
10874         nlmsg_free(msg);
10875 }
10876
10877 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10878                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10879 {
10880         struct wireless_dev *wdev = dev->ieee80211_ptr;
10881         struct wiphy *wiphy = wdev->wiphy;
10882         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10883         struct sk_buff *msg;
10884         struct nlattr *pinfoattr;
10885         void *hdr;
10886
10887         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10888
10889         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10890         if (!msg)
10891                 return;
10892
10893         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10894         if (!hdr) {
10895                 nlmsg_free(msg);
10896                 return;
10897         }
10898
10899         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10900             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10901             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10902                 goto nla_put_failure;
10903
10904         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10905         if (!pinfoattr)
10906                 goto nla_put_failure;
10907
10908         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10909                 goto nla_put_failure;
10910
10911         nla_nest_end(msg, pinfoattr);
10912
10913         genlmsg_end(msg, hdr);
10914
10915         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10916                                 nl80211_mlme_mcgrp.id, gfp);
10917         return;
10918
10919  nla_put_failure:
10920         genlmsg_cancel(msg, hdr);
10921         nlmsg_free(msg);
10922 }
10923 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10924
10925 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10926                            u64 cookie, bool acked, gfp_t gfp)
10927 {
10928         struct wireless_dev *wdev = dev->ieee80211_ptr;
10929         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10930         struct sk_buff *msg;
10931         void *hdr;
10932
10933         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10934
10935         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10936
10937         if (!msg)
10938                 return;
10939
10940         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10941         if (!hdr) {
10942                 nlmsg_free(msg);
10943                 return;
10944         }
10945
10946         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10947             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10948             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10949             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10950             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10951                 goto nla_put_failure;
10952
10953         genlmsg_end(msg, hdr);
10954
10955         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10956                                 nl80211_mlme_mcgrp.id, gfp);
10957         return;
10958
10959  nla_put_failure:
10960         genlmsg_cancel(msg, hdr);
10961         nlmsg_free(msg);
10962 }
10963 EXPORT_SYMBOL(cfg80211_probe_status);
10964
10965 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10966                                  const u8 *frame, size_t len,
10967                                  int freq, int sig_dbm)
10968 {
10969         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10970         struct sk_buff *msg;
10971         void *hdr;
10972         struct cfg80211_beacon_registration *reg;
10973
10974         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10975
10976         spin_lock_bh(&rdev->beacon_registrations_lock);
10977         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10978                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10979                 if (!msg) {
10980                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10981                         return;
10982                 }
10983
10984                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10985                 if (!hdr)
10986                         goto nla_put_failure;
10987
10988                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10989                     (freq &&
10990                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10991                     (sig_dbm &&
10992                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10993                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10994                         goto nla_put_failure;
10995
10996                 genlmsg_end(msg, hdr);
10997
10998                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10999         }
11000         spin_unlock_bh(&rdev->beacon_registrations_lock);
11001         return;
11002
11003  nla_put_failure:
11004         spin_unlock_bh(&rdev->beacon_registrations_lock);
11005         if (hdr)
11006                 genlmsg_cancel(msg, hdr);
11007         nlmsg_free(msg);
11008 }
11009 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11010
11011 #ifdef CONFIG_PM
11012 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11013                                    struct cfg80211_wowlan_wakeup *wakeup,
11014                                    gfp_t gfp)
11015 {
11016         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11017         struct sk_buff *msg;
11018         void *hdr;
11019         int size = 200;
11020
11021         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11022
11023         if (wakeup)
11024                 size += wakeup->packet_present_len;
11025
11026         msg = nlmsg_new(size, gfp);
11027         if (!msg)
11028                 return;
11029
11030         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11031         if (!hdr)
11032                 goto free_msg;
11033
11034         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11035             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11036                 goto free_msg;
11037
11038         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11039                                         wdev->netdev->ifindex))
11040                 goto free_msg;
11041
11042         if (wakeup) {
11043                 struct nlattr *reasons;
11044
11045                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11046
11047                 if (wakeup->disconnect &&
11048                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11049                         goto free_msg;
11050                 if (wakeup->magic_pkt &&
11051                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11052                         goto free_msg;
11053                 if (wakeup->gtk_rekey_failure &&
11054                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11055                         goto free_msg;
11056                 if (wakeup->eap_identity_req &&
11057                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11058                         goto free_msg;
11059                 if (wakeup->four_way_handshake &&
11060                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11061                         goto free_msg;
11062                 if (wakeup->rfkill_release &&
11063                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11064                         goto free_msg;
11065
11066                 if (wakeup->pattern_idx >= 0 &&
11067                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11068                                 wakeup->pattern_idx))
11069                         goto free_msg;
11070
11071                 if (wakeup->tcp_match)
11072                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
11073
11074                 if (wakeup->tcp_connlost)
11075                         nla_put_flag(msg,
11076                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
11077
11078                 if (wakeup->tcp_nomoretokens)
11079                         nla_put_flag(msg,
11080                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
11081
11082                 if (wakeup->packet) {
11083                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11084                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11085
11086                         if (!wakeup->packet_80211) {
11087                                 pkt_attr =
11088                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11089                                 len_attr =
11090                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11091                         }
11092
11093                         if (wakeup->packet_len &&
11094                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11095                                 goto free_msg;
11096
11097                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11098                                     wakeup->packet))
11099                                 goto free_msg;
11100                 }
11101
11102                 nla_nest_end(msg, reasons);
11103         }
11104
11105         genlmsg_end(msg, hdr);
11106
11107         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11108                                 nl80211_mlme_mcgrp.id, gfp);
11109         return;
11110
11111  free_msg:
11112         nlmsg_free(msg);
11113 }
11114 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11115 #endif
11116
11117 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11118                                 enum nl80211_tdls_operation oper,
11119                                 u16 reason_code, gfp_t gfp)
11120 {
11121         struct wireless_dev *wdev = dev->ieee80211_ptr;
11122         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11123         struct sk_buff *msg;
11124         void *hdr;
11125
11126         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11127                                          reason_code);
11128
11129         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11130         if (!msg)
11131                 return;
11132
11133         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11134         if (!hdr) {
11135                 nlmsg_free(msg);
11136                 return;
11137         }
11138
11139         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11140             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11141             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11142             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11143             (reason_code > 0 &&
11144              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11145                 goto nla_put_failure;
11146
11147         genlmsg_end(msg, hdr);
11148
11149         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11150                                 nl80211_mlme_mcgrp.id, gfp);
11151         return;
11152
11153  nla_put_failure:
11154         genlmsg_cancel(msg, hdr);
11155         nlmsg_free(msg);
11156 }
11157 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11158
11159 static int nl80211_netlink_notify(struct notifier_block * nb,
11160                                   unsigned long state,
11161                                   void *_notify)
11162 {
11163         struct netlink_notify *notify = _notify;
11164         struct cfg80211_registered_device *rdev;
11165         struct wireless_dev *wdev;
11166         struct cfg80211_beacon_registration *reg, *tmp;
11167
11168         if (state != NETLINK_URELEASE)
11169                 return NOTIFY_DONE;
11170
11171         rcu_read_lock();
11172
11173         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11174                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11175                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11176
11177                 spin_lock_bh(&rdev->beacon_registrations_lock);
11178                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11179                                          list) {
11180                         if (reg->nlportid == notify->portid) {
11181                                 list_del(&reg->list);
11182                                 kfree(reg);
11183                                 break;
11184                         }
11185                 }
11186                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11187         }
11188
11189         rcu_read_unlock();
11190
11191         return NOTIFY_DONE;
11192 }
11193
11194 static struct notifier_block nl80211_netlink_notifier = {
11195         .notifier_call = nl80211_netlink_notify,
11196 };
11197
11198 void cfg80211_ft_event(struct net_device *netdev,
11199                        struct cfg80211_ft_event_params *ft_event)
11200 {
11201         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11202         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11203         struct sk_buff *msg;
11204         void *hdr;
11205
11206         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11207
11208         if (!ft_event->target_ap)
11209                 return;
11210
11211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11212         if (!msg)
11213                 return;
11214
11215         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11216         if (!hdr) {
11217                 nlmsg_free(msg);
11218                 return;
11219         }
11220
11221         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
11222         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
11223         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
11224         if (ft_event->ies)
11225                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
11226         if (ft_event->ric_ies)
11227                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11228                         ft_event->ric_ies);
11229
11230         genlmsg_end(msg, hdr);
11231
11232         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
11233                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
11234 }
11235 EXPORT_SYMBOL(cfg80211_ft_event);
11236
11237 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11238 {
11239         struct cfg80211_registered_device *rdev;
11240         struct sk_buff *msg;
11241         void *hdr;
11242         u32 nlportid;
11243
11244         rdev = wiphy_to_dev(wdev->wiphy);
11245         if (!rdev->crit_proto_nlportid)
11246                 return;
11247
11248         nlportid = rdev->crit_proto_nlportid;
11249         rdev->crit_proto_nlportid = 0;
11250
11251         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11252         if (!msg)
11253                 return;
11254
11255         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11256         if (!hdr)
11257                 goto nla_put_failure;
11258
11259         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11260             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11261                 goto nla_put_failure;
11262
11263         genlmsg_end(msg, hdr);
11264
11265         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11266         return;
11267
11268  nla_put_failure:
11269         if (hdr)
11270                 genlmsg_cancel(msg, hdr);
11271         nlmsg_free(msg);
11272
11273 }
11274 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11275
11276 /* initialisation/exit functions */
11277
11278 int nl80211_init(void)
11279 {
11280         int err;
11281
11282         err = genl_register_family_with_ops(&nl80211_fam,
11283                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
11284         if (err)
11285                 return err;
11286
11287         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
11288         if (err)
11289                 goto err_out;
11290
11291         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
11292         if (err)
11293                 goto err_out;
11294
11295         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
11296         if (err)
11297                 goto err_out;
11298
11299         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
11300         if (err)
11301                 goto err_out;
11302
11303 #ifdef CONFIG_NL80211_TESTMODE
11304         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
11305         if (err)
11306                 goto err_out;
11307 #endif
11308
11309         err = netlink_register_notifier(&nl80211_netlink_notifier);
11310         if (err)
11311                 goto err_out;
11312
11313         return 0;
11314  err_out:
11315         genl_unregister_family(&nl80211_fam);
11316         return err;
11317 }
11318
11319 void nl80211_exit(void)
11320 {
11321         netlink_unregister_notifier(&nl80211_netlink_notifier);
11322         genl_unregister_family(&nl80211_fam);
11323 }