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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2016  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170
 171                 netdev = __dev_get_by_index(netns, ifindex);
 172                 if (netdev) {
 173                         if (netdev->ieee80211_ptr)
 174                                 tmp = wiphy_to_rdev(
 175                                         netdev->ieee80211_ptr->wiphy);
 176                         else
 177                                 tmp = NULL;
 178
 179                         /* not wireless device -- return error */
 180                         if (!tmp)
 181                                 return ERR_PTR(-EINVAL);
 182
 183                         /* mismatch -- return error */
 184                         if (rdev && tmp != rdev)
 185                                 return ERR_PTR(-EINVAL);
 186
 187                         rdev = tmp;
 188                 }
 189         }
 190
 191         if (!rdev)
 192                 return ERR_PTR(-ENODEV);
 193
 194         if (netns != wiphy_net(&rdev->wiphy))
 195                 return ERR_PTR(-ENODEV);
 196
 197         return rdev;
 198 }
 199
 200 /*
 201  * This function returns a pointer to the driver
 202  * that the genl_info item that is passed refers to.
 203  *
 204  * The result of this can be a PTR_ERR and hence must
 205  * be checked with IS_ERR() for errors.
 206  */
 207 static struct cfg80211_registered_device *
 208 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 209 {
 210         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 211 }
 212
 213 /* policy for the attributes */
 214 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 215         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 216         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 217                                       .len = 20-1 },
 218         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 219
 220         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 221         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 224         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 228         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 230         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 231         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 232
 233         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 235         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 236
 237         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 238         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 239
 240         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 241         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 242                                     .len = WLAN_MAX_KEY_LEN },
 243         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 244         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 245         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 246         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 247         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 248
 249         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 250         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 251         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 252                                        .len = IEEE80211_MAX_DATA_LEN },
 253         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 254                                        .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 256         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 257         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 258         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 259                                                .len = NL80211_MAX_SUPP_RATES },
 260         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 261         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 262         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 263         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 264                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 265         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 266
 267         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 268         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 269
 270         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 273         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 274                                            .len = NL80211_MAX_SUPP_RATES },
 275         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 276
 277         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 278         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 279
 280         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 281
 282         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 283         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 284                               .len = IEEE80211_MAX_DATA_LEN },
 285         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 286         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 287
 288         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 289                                 .len = IEEE80211_MAX_SSID_LEN },
 290         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 291         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 292         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 295         [NL80211_ATTR_STA_FLAGS2] = {
 296                 .len = sizeof(struct nl80211_sta_flag_update),
 297         },
 298         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 300         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 303         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 304         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 305         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 306         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 307                                  .len = WLAN_PMKID_LEN },
 308         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 309         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 310         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 311         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 312                                  .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 314         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 315         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 316         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 317         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 319         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 320         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 323         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 324         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 328         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 329         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 331         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 332         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 333                                          .len = IEEE80211_MAX_DATA_LEN },
 334         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 335                                          .len = IEEE80211_MAX_DATA_LEN },
 336         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 342         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 347                                       .len = IEEE80211_MAX_DATA_LEN },
 348         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 351                 .len = NL80211_HT_CAPABILITY_LEN
 352         },
 353         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 354         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 355         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 356         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 357         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 358         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 359         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 360         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 361         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 362         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 363         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 364         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 365         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 366         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 367         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 368         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 369         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 370                 .len = NL80211_VHT_CAPABILITY_LEN,
 371         },
 372         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 373         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 374                                   .len = IEEE80211_MAX_DATA_LEN },
 375         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 376         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 377         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 378         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 379         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 385         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 387         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 388         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 389                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 390         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 391         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 392         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 393         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 395         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 396         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 397         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 398         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 399         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 400         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 401         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 402         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 403         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 404         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 405         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 406         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 407         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 408         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 409                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 410         },
 411         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 412 };
 413
 414 /* policy for the key attributes */
 415 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 416         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 417         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 418         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 419         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 420         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 421         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 422         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 423         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 424 };
 425
 426 /* policy for the key default flags */
 427 static const struct nla_policy
 428 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 429         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 430         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 431 };
 432
 433 /* policy for WoWLAN attributes */
 434 static const struct nla_policy
 435 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 436         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 440         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 441         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 442         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 443         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 444         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 445         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 446 };
 447
 448 static const struct nla_policy
 449 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 450         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 451         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 452         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 453         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 454         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 455         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 456         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 457                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 458         },
 459         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 460                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 461         },
 462         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 463         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 464         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 465 };
 466
 467 /* policy for coalesce rule attributes */
 468 static const struct nla_policy
 469 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 470         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 471         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 472         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 473 };
 474
 475 /* policy for GTK rekey offload attributes */
 476 static const struct nla_policy
 477 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 478         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 479         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 480         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 481 };
 482
 483 static const struct nla_policy
 484 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 485         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 486                                                  .len = IEEE80211_MAX_SSID_LEN },
 487         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 488 };
 489
 490 static const struct nla_policy
 491 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 492         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 493         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 494 };
 495
 496 static const struct nla_policy
 497 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 498         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 499         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 500         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 501                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 502         },
 503 };
 504
 505 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 506                                      struct netlink_callback *cb,
 507                                      struct cfg80211_registered_device **rdev,
 508                                      struct wireless_dev **wdev)
 509 {
 510         int err;
 511
 512         rtnl_lock();
 513
 514         if (!cb->args[0]) {
 515                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 516                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 517                                   nl80211_policy);
 518                 if (err)
 519                         goto out_unlock;
 520
 521                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 522                                                    nl80211_fam.attrbuf);
 523                 if (IS_ERR(*wdev)) {
 524                         err = PTR_ERR(*wdev);
 525                         goto out_unlock;
 526                 }
 527                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 528                 /* 0 is the first index - add 1 to parse only once */
 529                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 530                 cb->args[1] = (*wdev)->identifier;
 531         } else {
 532                 /* subtract the 1 again here */
 533                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 534                 struct wireless_dev *tmp;
 535
 536                 if (!wiphy) {
 537                         err = -ENODEV;
 538                         goto out_unlock;
 539                 }
 540                 *rdev = wiphy_to_rdev(wiphy);
 541                 *wdev = NULL;
 542
 543                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 544                         if (tmp->identifier == cb->args[1]) {
 545                                 *wdev = tmp;
 546                                 break;
 547                         }
 548                 }
 549
 550                 if (!*wdev) {
 551                         err = -ENODEV;
 552                         goto out_unlock;
 553                 }
 554         }
 555
 556         return 0;
 557  out_unlock:
 558         rtnl_unlock();
 559         return err;
 560 }
 561
 562 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 563 {
 564         rtnl_unlock();
 565 }
 566
 567 /* IE validation */
 568 static bool is_valid_ie_attr(const struct nlattr *attr)
 569 {
 570         const u8 *pos;
 571         int len;
 572
 573         if (!attr)
 574                 return true;
 575
 576         pos = nla_data(attr);
 577         len = nla_len(attr);
 578
 579         while (len) {
 580                 u8 elemlen;
 581
 582                 if (len < 2)
 583                         return false;
 584                 len -= 2;
 585
 586                 elemlen = pos[1];
 587                 if (elemlen > len)
 588                         return false;
 589
 590                 len -= elemlen;
 591                 pos += 2 + elemlen;
 592         }
 593
 594         return true;
 595 }
 596
 597 /* message building helper */
 598 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 599                                    int flags, u8 cmd)
 600 {
 601         /* since there is no private header just add the generic one */
 602         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 603 }
 604
 605 static int nl80211_msg_put_channel(struct sk_buff *msg,
 606                                    struct ieee80211_channel *chan,
 607                                    bool large)
 608 {
 609         /* Some channels must be completely excluded from the
 610          * list to protect old user-space tools from breaking
 611          */
 612         if (!large && chan->flags &
 613             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 614                 return 0;
 615
 616         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 617                         chan->center_freq))
 618                 goto nla_put_failure;
 619
 620         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 621             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 622                 goto nla_put_failure;
 623         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 624                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 625                         goto nla_put_failure;
 626                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 627                         goto nla_put_failure;
 628         }
 629         if (chan->flags & IEEE80211_CHAN_RADAR) {
 630                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 631                         goto nla_put_failure;
 632                 if (large) {
 633                         u32 time;
 634
 635                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 636
 637                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 638                                         chan->dfs_state))
 639                                 goto nla_put_failure;
 640                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 641                                         time))
 642                                 goto nla_put_failure;
 643                         if (nla_put_u32(msg,
 644                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 645                                         chan->dfs_cac_ms))
 646                                 goto nla_put_failure;
 647                 }
 648         }
 649
 650         if (large) {
 651                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 652                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 653                         goto nla_put_failure;
 654                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 655                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 656                         goto nla_put_failure;
 657                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 658                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 659                         goto nla_put_failure;
 660                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 661                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 662                         goto nla_put_failure;
 663                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 664                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 665                         goto nla_put_failure;
 666                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 667                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 668                         goto nla_put_failure;
 669                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 670                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 671                         goto nla_put_failure;
 672                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 673                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 674                         goto nla_put_failure;
 675         }
 676
 677         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 678                         DBM_TO_MBM(chan->max_power)))
 679                 goto nla_put_failure;
 680
 681         return 0;
 682
 683  nla_put_failure:
 684         return -ENOBUFS;
 685 }
 686
 687 /* netlink command implementations */
 688
 689 struct key_parse {
 690         struct key_params p;
 691         int idx;
 692         int type;
 693         bool def, defmgmt;
 694         bool def_uni, def_multi;
 695 };
 696
 697 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 698 {
 699         struct nlattr *tb[NL80211_KEY_MAX + 1];
 700         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 701                                    nl80211_key_policy);
 702         if (err)
 703                 return err;
 704
 705         k->def = !!tb[NL80211_KEY_DEFAULT];
 706         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 707
 708         if (k->def) {
 709                 k->def_uni = true;
 710                 k->def_multi = true;
 711         }
 712         if (k->defmgmt)
 713                 k->def_multi = true;
 714
 715         if (tb[NL80211_KEY_IDX])
 716                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 717
 718         if (tb[NL80211_KEY_DATA]) {
 719                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 720                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 721         }
 722
 723         if (tb[NL80211_KEY_SEQ]) {
 724                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 725                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 726         }
 727
 728         if (tb[NL80211_KEY_CIPHER])
 729                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 730
 731         if (tb[NL80211_KEY_TYPE]) {
 732                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 733                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 734                         return -EINVAL;
 735         }
 736
 737         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 738                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 739
 740                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 741                                        tb[NL80211_KEY_DEFAULT_TYPES],
 742                                        nl80211_key_default_policy);
 743                 if (err)
 744                         return err;
 745
 746                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 747                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 754 {
 755         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 756                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 757                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 758         }
 759
 760         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 761                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 762                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 763         }
 764
 765         if (info->attrs[NL80211_ATTR_KEY_IDX])
 766                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 767
 768         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 769                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 770
 771         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 772         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 773
 774         if (k->def) {
 775                 k->def_uni = true;
 776                 k->def_multi = true;
 777         }
 778         if (k->defmgmt)
 779                 k->def_multi = true;
 780
 781         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 782                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 783                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 784                         return -EINVAL;
 785         }
 786
 787         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 788                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 789                 int err = nla_parse_nested(
 790                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 791                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 792                                 nl80211_key_default_policy);
 793                 if (err)
 794                         return err;
 795
 796                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 797                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 804 {
 805         int err;
 806
 807         memset(k, 0, sizeof(*k));
 808         k->idx = -1;
 809         k->type = -1;
 810
 811         if (info->attrs[NL80211_ATTR_KEY])
 812                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 813         else
 814                 err = nl80211_parse_key_old(info, k);
 815
 816         if (err)
 817                 return err;
 818
 819         if (k->def && k->defmgmt)
 820                 return -EINVAL;
 821
 822         if (k->defmgmt) {
 823                 if (k->def_uni || !k->def_multi)
 824                         return -EINVAL;
 825         }
 826
 827         if (k->idx != -1) {
 828                 if (k->defmgmt) {
 829                         if (k->idx < 4 || k->idx > 5)
 830                                 return -EINVAL;
 831                 } else if (k->def) {
 832                         if (k->idx < 0 || k->idx > 3)
 833                                 return -EINVAL;
 834                 } else {
 835                         if (k->idx < 0 || k->idx > 5)
 836                                 return -EINVAL;
 837                 }
 838         }
 839
 840         return 0;
 841 }
 842
 843 static struct cfg80211_cached_keys *
 844 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 845                        struct nlattr *keys, bool *no_ht)
 846 {
 847         struct key_parse parse;
 848         struct nlattr *key;
 849         struct cfg80211_cached_keys *result;
 850         int rem, err, def = 0;
 851
 852         result = kzalloc(sizeof(*result), GFP_KERNEL);
 853         if (!result)
 854                 return ERR_PTR(-ENOMEM);
 855
 856         result->def = -1;
 857         result->defmgmt = -1;
 858
 859         nla_for_each_nested(key, keys, rem) {
 860                 memset(&parse, 0, sizeof(parse));
 861                 parse.idx = -1;
 862
 863                 err = nl80211_parse_key_new(key, &parse);
 864                 if (err)
 865                         goto error;
 866                 err = -EINVAL;
 867                 if (!parse.p.key)
 868                         goto error;
 869                 if (parse.idx < 0 || parse.idx > 4)
 870                         goto error;
 871                 if (parse.def) {
 872                         if (def)
 873                                 goto error;
 874                         def = 1;
 875                         result->def = parse.idx;
 876                         if (!parse.def_uni || !parse.def_multi)
 877                                 goto error;
 878                 } else if (parse.defmgmt)
 879                         goto error;
 880                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 881                                                      parse.idx, false, NULL);
 882                 if (err)
 883                         goto error;
 884                 result->params[parse.idx].cipher = parse.p.cipher;
 885                 result->params[parse.idx].key_len = parse.p.key_len;
 886                 result->params[parse.idx].key = result->data[parse.idx];
 887                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 888
 889                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 890                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 891                         if (no_ht)
 892                                 *no_ht = true;
 893                 }
 894         }
 895
 896         return result;
 897  error:
 898         kfree(result);
 899         return ERR_PTR(err);
 900 }
 901
 902 static int nl80211_key_allowed(struct wireless_dev *wdev)
 903 {
 904         ASSERT_WDEV_LOCK(wdev);
 905
 906         switch (wdev->iftype) {
 907         case NL80211_IFTYPE_AP:
 908         case NL80211_IFTYPE_AP_VLAN:
 909         case NL80211_IFTYPE_P2P_GO:
 910         case NL80211_IFTYPE_MESH_POINT:
 911                 break;
 912         case NL80211_IFTYPE_ADHOC:
 913         case NL80211_IFTYPE_STATION:
 914         case NL80211_IFTYPE_P2P_CLIENT:
 915                 if (!wdev->current_bss)
 916                         return -ENOLINK;
 917                 break;
 918         case NL80211_IFTYPE_UNSPECIFIED:
 919         case NL80211_IFTYPE_OCB:
 920         case NL80211_IFTYPE_MONITOR:
 921         case NL80211_IFTYPE_P2P_DEVICE:
 922         case NL80211_IFTYPE_WDS:
 923         case NUM_NL80211_IFTYPES:
 924                 return -EINVAL;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 931                                                         struct nlattr *tb)
 932 {
 933         struct ieee80211_channel *chan;
 934
 935         if (tb == NULL)
 936                 return NULL;
 937         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 938         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 939                 return NULL;
 940         return chan;
 941 }
 942
 943 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 944 {
 945         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 946         int i;
 947
 948         if (!nl_modes)
 949                 goto nla_put_failure;
 950
 951         i = 0;
 952         while (ifmodes) {
 953                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 954                         goto nla_put_failure;
 955                 ifmodes >>= 1;
 956                 i++;
 957         }
 958
 959         nla_nest_end(msg, nl_modes);
 960         return 0;
 961
 962 nla_put_failure:
 963         return -ENOBUFS;
 964 }
 965
 966 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 967                                           struct sk_buff *msg,
 968                                           bool large)
 969 {
 970         struct nlattr *nl_combis;
 971         int i, j;
 972
 973         nl_combis = nla_nest_start(msg,
 974                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 975         if (!nl_combis)
 976                 goto nla_put_failure;
 977
 978         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 979                 const struct ieee80211_iface_combination *c;
 980                 struct nlattr *nl_combi, *nl_limits;
 981
 982                 c = &wiphy->iface_combinations[i];
 983
 984                 nl_combi = nla_nest_start(msg, i + 1);
 985                 if (!nl_combi)
 986                         goto nla_put_failure;
 987
 988                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 989                 if (!nl_limits)
 990                         goto nla_put_failure;
 991
 992                 for (j = 0; j < c->n_limits; j++) {
 993                         struct nlattr *nl_limit;
 994
 995                         nl_limit = nla_nest_start(msg, j + 1);
 996                         if (!nl_limit)
 997                                 goto nla_put_failure;
 998                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 999                                         c->limits[j].max))
1000                                 goto nla_put_failure;
1001                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1002                                                 c->limits[j].types))
1003                                 goto nla_put_failure;
1004                         nla_nest_end(msg, nl_limit);
1005                 }
1006
1007                 nla_nest_end(msg, nl_limits);
1008
1009                 if (c->beacon_int_infra_match &&
1010                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1011                         goto nla_put_failure;
1012                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1013                                 c->num_different_channels) ||
1014                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1015                                 c->max_interfaces))
1016                         goto nla_put_failure;
1017                 if (large &&
1018                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1019                                 c->radar_detect_widths) ||
1020                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1021                                 c->radar_detect_regions)))
1022                         goto nla_put_failure;
1023
1024                 nla_nest_end(msg, nl_combi);
1025         }
1026
1027         nla_nest_end(msg, nl_combis);
1028
1029         return 0;
1030 nla_put_failure:
1031         return -ENOBUFS;
1032 }
1033
1034 #ifdef CONFIG_PM
1035 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1036                                         struct sk_buff *msg)
1037 {
1038         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1039         struct nlattr *nl_tcp;
1040
1041         if (!tcp)
1042                 return 0;
1043
1044         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1045         if (!nl_tcp)
1046                 return -ENOBUFS;
1047
1048         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1049                         tcp->data_payload_max))
1050                 return -ENOBUFS;
1051
1052         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1053                         tcp->data_payload_max))
1054                 return -ENOBUFS;
1055
1056         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1057                 return -ENOBUFS;
1058
1059         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1060                                 sizeof(*tcp->tok), tcp->tok))
1061                 return -ENOBUFS;
1062
1063         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1064                         tcp->data_interval_max))
1065                 return -ENOBUFS;
1066
1067         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1068                         tcp->wake_payload_max))
1069                 return -ENOBUFS;
1070
1071         nla_nest_end(msg, nl_tcp);
1072         return 0;
1073 }
1074
1075 static int nl80211_send_wowlan(struct sk_buff *msg,
1076                                struct cfg80211_registered_device *rdev,
1077                                bool large)
1078 {
1079         struct nlattr *nl_wowlan;
1080
1081         if (!rdev->wiphy.wowlan)
1082                 return 0;
1083
1084         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1085         if (!nl_wowlan)
1086                 return -ENOBUFS;
1087
1088         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1089              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1090             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1091              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1092             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1093              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1094             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1095              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1096             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1097              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1098             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1099              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1100             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1101              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1102             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1103              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1104                 return -ENOBUFS;
1105
1106         if (rdev->wiphy.wowlan->n_patterns) {
1107                 struct nl80211_pattern_support pat = {
1108                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1109                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1110                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1111                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1112                 };
1113
1114                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1115                             sizeof(pat), &pat))
1116                         return -ENOBUFS;
1117         }
1118
1119         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1120             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1121                         rdev->wiphy.wowlan->max_nd_match_sets))
1122                 return -ENOBUFS;
1123
1124         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1125                 return -ENOBUFS;
1126
1127         nla_nest_end(msg, nl_wowlan);
1128
1129         return 0;
1130 }
1131 #endif
1132
1133 static int nl80211_send_coalesce(struct sk_buff *msg,
1134                                  struct cfg80211_registered_device *rdev)
1135 {
1136         struct nl80211_coalesce_rule_support rule;
1137
1138         if (!rdev->wiphy.coalesce)
1139                 return 0;
1140
1141         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1142         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1143         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1144         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1145         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1146         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1147
1148         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1149                 return -ENOBUFS;
1150
1151         return 0;
1152 }
1153
1154 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1155                                       struct ieee80211_supported_band *sband)
1156 {
1157         struct nlattr *nl_rates, *nl_rate;
1158         struct ieee80211_rate *rate;
1159         int i;
1160
1161         /* add HT info */
1162         if (sband->ht_cap.ht_supported &&
1163             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1164                      sizeof(sband->ht_cap.mcs),
1165                      &sband->ht_cap.mcs) ||
1166              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1167                          sband->ht_cap.cap) ||
1168              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1169                         sband->ht_cap.ampdu_factor) ||
1170              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1171                         sband->ht_cap.ampdu_density)))
1172                 return -ENOBUFS;
1173
1174         /* add VHT info */
1175         if (sband->vht_cap.vht_supported &&
1176             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1177                      sizeof(sband->vht_cap.vht_mcs),
1178                      &sband->vht_cap.vht_mcs) ||
1179              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1180                          sband->vht_cap.cap)))
1181                 return -ENOBUFS;
1182
1183         /* add bitrates */
1184         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1185         if (!nl_rates)
1186                 return -ENOBUFS;
1187
1188         for (i = 0; i < sband->n_bitrates; i++) {
1189                 nl_rate = nla_nest_start(msg, i);
1190                 if (!nl_rate)
1191                         return -ENOBUFS;
1192
1193                 rate = &sband->bitrates[i];
1194                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1195                                 rate->bitrate))
1196                         return -ENOBUFS;
1197                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1198                     nla_put_flag(msg,
1199                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1200                         return -ENOBUFS;
1201
1202                 nla_nest_end(msg, nl_rate);
1203         }
1204
1205         nla_nest_end(msg, nl_rates);
1206
1207         return 0;
1208 }
1209
1210 static int
1211 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1212                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1213 {
1214         u16 stypes;
1215         struct nlattr *nl_ftypes, *nl_ifs;
1216         enum nl80211_iftype ift;
1217         int i;
1218
1219         if (!mgmt_stypes)
1220                 return 0;
1221
1222         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1223         if (!nl_ifs)
1224                 return -ENOBUFS;
1225
1226         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1227                 nl_ftypes = nla_nest_start(msg, ift);
1228                 if (!nl_ftypes)
1229                         return -ENOBUFS;
1230                 i = 0;
1231                 stypes = mgmt_stypes[ift].tx;
1232                 while (stypes) {
1233                         if ((stypes & 1) &&
1234                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1235                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1236                                 return -ENOBUFS;
1237                         stypes >>= 1;
1238                         i++;
1239                 }
1240                 nla_nest_end(msg, nl_ftypes);
1241         }
1242
1243         nla_nest_end(msg, nl_ifs);
1244
1245         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1246         if (!nl_ifs)
1247                 return -ENOBUFS;
1248
1249         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1250                 nl_ftypes = nla_nest_start(msg, ift);
1251                 if (!nl_ftypes)
1252                         return -ENOBUFS;
1253                 i = 0;
1254                 stypes = mgmt_stypes[ift].rx;
1255                 while (stypes) {
1256                         if ((stypes & 1) &&
1257                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1258                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1259                                 return -ENOBUFS;
1260                         stypes >>= 1;
1261                         i++;
1262                 }
1263                 nla_nest_end(msg, nl_ftypes);
1264         }
1265         nla_nest_end(msg, nl_ifs);
1266
1267         return 0;
1268 }
1269
1270 struct nl80211_dump_wiphy_state {
1271         s64 filter_wiphy;
1272         long start;
1273         long split_start, band_start, chan_start, capa_start;
1274         bool split;
1275 };
1276
1277 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1278                               enum nl80211_commands cmd,
1279                               struct sk_buff *msg, u32 portid, u32 seq,
1280                               int flags, struct nl80211_dump_wiphy_state *state)
1281 {
1282         void *hdr;
1283         struct nlattr *nl_bands, *nl_band;
1284         struct nlattr *nl_freqs, *nl_freq;
1285         struct nlattr *nl_cmds;
1286         enum nl80211_band band;
1287         struct ieee80211_channel *chan;
1288         int i;
1289         const struct ieee80211_txrx_stypes *mgmt_stypes =
1290                                 rdev->wiphy.mgmt_stypes;
1291         u32 features;
1292
1293         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1294         if (!hdr)
1295                 return -ENOBUFS;
1296
1297         if (WARN_ON(!state))
1298                 return -EINVAL;
1299
1300         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1301             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1302                            wiphy_name(&rdev->wiphy)) ||
1303             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1304                         cfg80211_rdev_list_generation))
1305                 goto nla_put_failure;
1306
1307         if (cmd != NL80211_CMD_NEW_WIPHY)
1308                 goto finish;
1309
1310         switch (state->split_start) {
1311         case 0:
1312                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1313                                rdev->wiphy.retry_short) ||
1314                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1315                                rdev->wiphy.retry_long) ||
1316                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1317                                 rdev->wiphy.frag_threshold) ||
1318                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1319                                 rdev->wiphy.rts_threshold) ||
1320                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1321                                rdev->wiphy.coverage_class) ||
1322                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1323                                rdev->wiphy.max_scan_ssids) ||
1324                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1325                                rdev->wiphy.max_sched_scan_ssids) ||
1326                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1327                                 rdev->wiphy.max_scan_ie_len) ||
1328                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1329                                 rdev->wiphy.max_sched_scan_ie_len) ||
1330                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1331                                rdev->wiphy.max_match_sets) ||
1332                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1333                                 rdev->wiphy.max_sched_scan_plans) ||
1334                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1335                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1336                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1337                                 rdev->wiphy.max_sched_scan_plan_iterations))
1338                         goto nla_put_failure;
1339
1340                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1341                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1342                         goto nla_put_failure;
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1344                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1345                         goto nla_put_failure;
1346                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1347                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1348                         goto nla_put_failure;
1349                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1350                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1351                         goto nla_put_failure;
1352                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1353                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1354                         goto nla_put_failure;
1355                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1356                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1357                         goto nla_put_failure;
1358                 state->split_start++;
1359                 if (state->split)
1360                         break;
1361         case 1:
1362                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1363                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1364                             rdev->wiphy.cipher_suites))
1365                         goto nla_put_failure;
1366
1367                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1368                                rdev->wiphy.max_num_pmkids))
1369                         goto nla_put_failure;
1370
1371                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1372                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1373                         goto nla_put_failure;
1374
1375                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1376                                 rdev->wiphy.available_antennas_tx) ||
1377                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1378                                 rdev->wiphy.available_antennas_rx))
1379                         goto nla_put_failure;
1380
1381                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1382                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1383                                 rdev->wiphy.probe_resp_offload))
1384                         goto nla_put_failure;
1385
1386                 if ((rdev->wiphy.available_antennas_tx ||
1387                      rdev->wiphy.available_antennas_rx) &&
1388                     rdev->ops->get_antenna) {
1389                         u32 tx_ant = 0, rx_ant = 0;
1390                         int res;
1391
1392                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1393                         if (!res) {
1394                                 if (nla_put_u32(msg,
1395                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1396                                                 tx_ant) ||
1397                                     nla_put_u32(msg,
1398                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1399                                                 rx_ant))
1400                                         goto nla_put_failure;
1401                         }
1402                 }
1403
1404                 state->split_start++;
1405                 if (state->split)
1406                         break;
1407         case 2:
1408                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1409                                         rdev->wiphy.interface_modes))
1410                                 goto nla_put_failure;
1411                 state->split_start++;
1412                 if (state->split)
1413                         break;
1414         case 3:
1415                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1416                 if (!nl_bands)
1417                         goto nla_put_failure;
1418
1419                 for (band = state->band_start;
1420                      band < NUM_NL80211_BANDS; band++) {
1421                         struct ieee80211_supported_band *sband;
1422
1423                         sband = rdev->wiphy.bands[band];
1424
1425                         if (!sband)
1426                                 continue;
1427
1428                         nl_band = nla_nest_start(msg, band);
1429                         if (!nl_band)
1430                                 goto nla_put_failure;
1431
1432                         switch (state->chan_start) {
1433                         case 0:
1434                                 if (nl80211_send_band_rateinfo(msg, sband))
1435                                         goto nla_put_failure;
1436                                 state->chan_start++;
1437                                 if (state->split)
1438                                         break;
1439                         default:
1440                                 /* add frequencies */
1441                                 nl_freqs = nla_nest_start(
1442                                         msg, NL80211_BAND_ATTR_FREQS);
1443                                 if (!nl_freqs)
1444                                         goto nla_put_failure;
1445
1446                                 for (i = state->chan_start - 1;
1447                                      i < sband->n_channels;
1448                                      i++) {
1449                                         nl_freq = nla_nest_start(msg, i);
1450                                         if (!nl_freq)
1451                                                 goto nla_put_failure;
1452
1453                                         chan = &sband->channels[i];
1454
1455                                         if (nl80211_msg_put_channel(
1456                                                         msg, chan,
1457                                                         state->split))
1458                                                 goto nla_put_failure;
1459
1460                                         nla_nest_end(msg, nl_freq);
1461                                         if (state->split)
1462                                                 break;
1463                                 }
1464                                 if (i < sband->n_channels)
1465                                         state->chan_start = i + 2;
1466                                 else
1467                                         state->chan_start = 0;
1468                                 nla_nest_end(msg, nl_freqs);
1469                         }
1470
1471                         nla_nest_end(msg, nl_band);
1472
1473                         if (state->split) {
1474                                 /* start again here */
1475                                 if (state->chan_start)
1476                                         band--;
1477                                 break;
1478                         }
1479                 }
1480                 nla_nest_end(msg, nl_bands);
1481
1482                 if (band < NUM_NL80211_BANDS)
1483                         state->band_start = band + 1;
1484                 else
1485                         state->band_start = 0;
1486
1487                 /* if bands & channels are done, continue outside */
1488                 if (state->band_start == 0 && state->chan_start == 0)
1489                         state->split_start++;
1490                 if (state->split)
1491                         break;
1492         case 4:
1493                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1494                 if (!nl_cmds)
1495                         goto nla_put_failure;
1496
1497                 i = 0;
1498 #define CMD(op, n)                                                      \
1499                  do {                                                   \
1500                         if (rdev->ops->op) {                            \
1501                                 i++;                                    \
1502                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1503                                         goto nla_put_failure;           \
1504                         }                                               \
1505                 } while (0)
1506
1507                 CMD(add_virtual_intf, NEW_INTERFACE);
1508                 CMD(change_virtual_intf, SET_INTERFACE);
1509                 CMD(add_key, NEW_KEY);
1510                 CMD(start_ap, START_AP);
1511                 CMD(add_station, NEW_STATION);
1512                 CMD(add_mpath, NEW_MPATH);
1513                 CMD(update_mesh_config, SET_MESH_CONFIG);
1514                 CMD(change_bss, SET_BSS);
1515                 CMD(auth, AUTHENTICATE);
1516                 CMD(assoc, ASSOCIATE);
1517                 CMD(deauth, DEAUTHENTICATE);
1518                 CMD(disassoc, DISASSOCIATE);
1519                 CMD(join_ibss, JOIN_IBSS);
1520                 CMD(join_mesh, JOIN_MESH);
1521                 CMD(set_pmksa, SET_PMKSA);
1522                 CMD(del_pmksa, DEL_PMKSA);
1523                 CMD(flush_pmksa, FLUSH_PMKSA);
1524                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1525                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1526                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1527                 CMD(mgmt_tx, FRAME);
1528                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1529                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1530                         i++;
1531                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1532                                 goto nla_put_failure;
1533                 }
1534                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1535                     rdev->ops->join_mesh) {
1536                         i++;
1537                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1538                                 goto nla_put_failure;
1539                 }
1540                 CMD(set_wds_peer, SET_WDS_PEER);
1541                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1542                         CMD(tdls_mgmt, TDLS_MGMT);
1543                         CMD(tdls_oper, TDLS_OPER);
1544                 }
1545                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1546                         CMD(sched_scan_start, START_SCHED_SCAN);
1547                 CMD(probe_client, PROBE_CLIENT);
1548                 CMD(set_noack_map, SET_NOACK_MAP);
1549                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1550                         i++;
1551                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1552                                 goto nla_put_failure;
1553                 }
1554                 CMD(start_p2p_device, START_P2P_DEVICE);
1555                 CMD(set_mcast_rate, SET_MCAST_RATE);
1556 #ifdef CONFIG_NL80211_TESTMODE
1557                 CMD(testmode_cmd, TESTMODE);
1558 #endif
1559                 if (state->split) {
1560                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1561                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1562                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1563                                 CMD(channel_switch, CHANNEL_SWITCH);
1564                         CMD(set_qos_map, SET_QOS_MAP);
1565                         if (rdev->wiphy.features &
1566                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1567                                 CMD(add_tx_ts, ADD_TX_TS);
1568                 }
1569                 /* add into the if now */
1570 #undef CMD
1571
1572                 if (rdev->ops->connect || rdev->ops->auth) {
1573                         i++;
1574                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1575                                 goto nla_put_failure;
1576                 }
1577
1578                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1579                         i++;
1580                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1581                                 goto nla_put_failure;
1582                 }
1583
1584                 nla_nest_end(msg, nl_cmds);
1585                 state->split_start++;
1586                 if (state->split)
1587                         break;
1588         case 5:
1589                 if (rdev->ops->remain_on_channel &&
1590                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1591                     nla_put_u32(msg,
1592                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1593                                 rdev->wiphy.max_remain_on_channel_duration))
1594                         goto nla_put_failure;
1595
1596                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1597                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1598                         goto nla_put_failure;
1599
1600                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1601                         goto nla_put_failure;
1602                 state->split_start++;
1603                 if (state->split)
1604                         break;
1605         case 6:
1606 #ifdef CONFIG_PM
1607                 if (nl80211_send_wowlan(msg, rdev, state->split))
1608                         goto nla_put_failure;
1609                 state->split_start++;
1610                 if (state->split)
1611                         break;
1612 #else
1613                 state->split_start++;
1614 #endif
1615         case 7:
1616                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1617                                         rdev->wiphy.software_iftypes))
1618                         goto nla_put_failure;
1619
1620                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1621                                                    state->split))
1622                         goto nla_put_failure;
1623
1624                 state->split_start++;
1625                 if (state->split)
1626                         break;
1627         case 8:
1628                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1629                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1630                                 rdev->wiphy.ap_sme_capa))
1631                         goto nla_put_failure;
1632
1633                 features = rdev->wiphy.features;
1634                 /*
1635                  * We can only add the per-channel limit information if the
1636                  * dump is split, otherwise it makes it too big. Therefore
1637                  * only advertise it in that case.
1638                  */
1639                 if (state->split)
1640                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1641                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1642                         goto nla_put_failure;
1643
1644                 if (rdev->wiphy.ht_capa_mod_mask &&
1645                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1646                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1647                             rdev->wiphy.ht_capa_mod_mask))
1648                         goto nla_put_failure;
1649
1650                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1651                     rdev->wiphy.max_acl_mac_addrs &&
1652                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1653                                 rdev->wiphy.max_acl_mac_addrs))
1654                         goto nla_put_failure;
1655
1656                 /*
1657                  * Any information below this point is only available to
1658                  * applications that can deal with it being split. This
1659                  * helps ensure that newly added capabilities don't break
1660                  * older tools by overrunning their buffers.
1661                  *
1662                  * We still increment split_start so that in the split
1663                  * case we'll continue with more data in the next round,
1664                  * but break unconditionally so unsplit data stops here.
1665                  */
1666                 state->split_start++;
1667                 break;
1668         case 9:
1669                 if (rdev->wiphy.extended_capabilities &&
1670                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1671                              rdev->wiphy.extended_capabilities_len,
1672                              rdev->wiphy.extended_capabilities) ||
1673                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1674                              rdev->wiphy.extended_capabilities_len,
1675                              rdev->wiphy.extended_capabilities_mask)))
1676                         goto nla_put_failure;
1677
1678                 if (rdev->wiphy.vht_capa_mod_mask &&
1679                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1680                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1681                             rdev->wiphy.vht_capa_mod_mask))
1682                         goto nla_put_failure;
1683
1684                 state->split_start++;
1685                 break;
1686         case 10:
1687                 if (nl80211_send_coalesce(msg, rdev))
1688                         goto nla_put_failure;
1689
1690                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1691                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1692                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1693                         goto nla_put_failure;
1694
1695                 if (rdev->wiphy.max_ap_assoc_sta &&
1696                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1697                                 rdev->wiphy.max_ap_assoc_sta))
1698                         goto nla_put_failure;
1699
1700                 state->split_start++;
1701                 break;
1702         case 11:
1703                 if (rdev->wiphy.n_vendor_commands) {
1704                         const struct nl80211_vendor_cmd_info *info;
1705                         struct nlattr *nested;
1706
1707                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1708                         if (!nested)
1709                                 goto nla_put_failure;
1710
1711                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1712                                 info = &rdev->wiphy.vendor_commands[i].info;
1713                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1714                                         goto nla_put_failure;
1715                         }
1716                         nla_nest_end(msg, nested);
1717                 }
1718
1719                 if (rdev->wiphy.n_vendor_events) {
1720                         const struct nl80211_vendor_cmd_info *info;
1721                         struct nlattr *nested;
1722
1723                         nested = nla_nest_start(msg,
1724                                                 NL80211_ATTR_VENDOR_EVENTS);
1725                         if (!nested)
1726                                 goto nla_put_failure;
1727
1728                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1729                                 info = &rdev->wiphy.vendor_events[i];
1730                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1731                                         goto nla_put_failure;
1732                         }
1733                         nla_nest_end(msg, nested);
1734                 }
1735                 state->split_start++;
1736                 break;
1737         case 12:
1738                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1739                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1740                                rdev->wiphy.max_num_csa_counters))
1741                         goto nla_put_failure;
1742
1743                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1744                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1745                         goto nla_put_failure;
1746
1747                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1748                             sizeof(rdev->wiphy.ext_features),
1749                             rdev->wiphy.ext_features))
1750                         goto nla_put_failure;
1751
1752                 if (rdev->wiphy.bss_select_support) {
1753                         struct nlattr *nested;
1754                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1755
1756                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1757                         if (!nested)
1758                                 goto nla_put_failure;
1759
1760                         i = 0;
1761                         while (bss_select_support) {
1762                                 if ((bss_select_support & 1) &&
1763                                     nla_put_flag(msg, i))
1764                                         goto nla_put_failure;
1765                                 i++;
1766                                 bss_select_support >>= 1;
1767                         }
1768                         nla_nest_end(msg, nested);
1769                 }
1770
1771                 state->split_start++;
1772                 break;
1773         case 13:
1774                 if (rdev->wiphy.num_iftype_ext_capab &&
1775                     rdev->wiphy.iftype_ext_capab) {
1776                         struct nlattr *nested_ext_capab, *nested;
1777
1778                         nested = nla_nest_start(msg,
1779                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1780                         if (!nested)
1781                                 goto nla_put_failure;
1782
1783                         for (i = state->capa_start;
1784                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1785                                 const struct wiphy_iftype_ext_capab *capab;
1786
1787                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1788
1789                                 nested_ext_capab = nla_nest_start(msg, i);
1790                                 if (!nested_ext_capab ||
1791                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1792                                                 capab->iftype) ||
1793                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1794                                             capab->extended_capabilities_len,
1795                                             capab->extended_capabilities) ||
1796                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1797                                             capab->extended_capabilities_len,
1798                                             capab->extended_capabilities_mask))
1799                                         goto nla_put_failure;
1800
1801                                 nla_nest_end(msg, nested_ext_capab);
1802                                 if (state->split)
1803                                         break;
1804                         }
1805                         nla_nest_end(msg, nested);
1806                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1807                                 state->capa_start = i + 1;
1808                                 break;
1809                         }
1810                 }
1811
1812                 /* done */
1813                 state->split_start = 0;
1814                 break;
1815         }
1816  finish:
1817         genlmsg_end(msg, hdr);
1818         return 0;
1819
1820  nla_put_failure:
1821         genlmsg_cancel(msg, hdr);
1822         return -EMSGSIZE;
1823 }
1824
1825 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1826                                     struct netlink_callback *cb,
1827                                     struct nl80211_dump_wiphy_state *state)
1828 {
1829         struct nlattr **tb = nl80211_fam.attrbuf;
1830         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1831                               tb, nl80211_fam.maxattr, nl80211_policy);
1832         /* ignore parse errors for backward compatibility */
1833         if (ret)
1834                 return 0;
1835
1836         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1837         if (tb[NL80211_ATTR_WIPHY])
1838                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1839         if (tb[NL80211_ATTR_WDEV])
1840                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1841         if (tb[NL80211_ATTR_IFINDEX]) {
1842                 struct net_device *netdev;
1843                 struct cfg80211_registered_device *rdev;
1844                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1845
1846                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1847                 if (!netdev)
1848                         return -ENODEV;
1849                 if (netdev->ieee80211_ptr) {
1850                         rdev = wiphy_to_rdev(
1851                                 netdev->ieee80211_ptr->wiphy);
1852                         state->filter_wiphy = rdev->wiphy_idx;
1853                 }
1854         }
1855
1856         return 0;
1857 }
1858
1859 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1860 {
1861         int idx = 0, ret;
1862         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1863         struct cfg80211_registered_device *rdev;
1864
1865         rtnl_lock();
1866         if (!state) {
1867                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1868                 if (!state) {
1869                         rtnl_unlock();
1870                         return -ENOMEM;
1871                 }
1872                 state->filter_wiphy = -1;
1873                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1874                 if (ret) {
1875                         kfree(state);
1876                         rtnl_unlock();
1877                         return ret;
1878                 }
1879                 cb->args[0] = (long)state;
1880         }
1881
1882         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1883                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1884                         continue;
1885                 if (++idx <= state->start)
1886                         continue;
1887                 if (state->filter_wiphy != -1 &&
1888                     state->filter_wiphy != rdev->wiphy_idx)
1889                         continue;
1890                 /* attempt to fit multiple wiphy data chunks into the skb */
1891                 do {
1892                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1893                                                  skb,
1894                                                  NETLINK_CB(cb->skb).portid,
1895                                                  cb->nlh->nlmsg_seq,
1896                                                  NLM_F_MULTI, state);
1897                         if (ret < 0) {
1898                                 /*
1899                                  * If sending the wiphy data didn't fit (ENOBUFS
1900                                  * or EMSGSIZE returned), this SKB is still
1901                                  * empty (so it's not too big because another
1902                                  * wiphy dataset is already in the skb) and
1903                                  * we've not tried to adjust the dump allocation
1904                                  * yet ... then adjust the alloc size to be
1905                                  * bigger, and return 1 but with the empty skb.
1906                                  * This results in an empty message being RX'ed
1907                                  * in userspace, but that is ignored.
1908                                  *
1909                                  * We can then retry with the larger buffer.
1910                                  */
1911                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1912                                     !skb->len && !state->split &&
1913                                     cb->min_dump_alloc < 4096) {
1914                                         cb->min_dump_alloc = 4096;
1915                                         state->split_start = 0;
1916                                         rtnl_unlock();
1917                                         return 1;
1918                                 }
1919                                 idx--;
1920                                 break;
1921                         }
1922                 } while (state->split_start > 0);
1923                 break;
1924         }
1925         rtnl_unlock();
1926
1927         state->start = idx;
1928
1929         return skb->len;
1930 }
1931
1932 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1933 {
1934         kfree((void *)cb->args[0]);
1935         return 0;
1936 }
1937
1938 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1939 {
1940         struct sk_buff *msg;
1941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1942         struct nl80211_dump_wiphy_state state = {};
1943
1944         msg = nlmsg_new(4096, GFP_KERNEL);
1945         if (!msg)
1946                 return -ENOMEM;
1947
1948         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1949                                info->snd_portid, info->snd_seq, 0,
1950                                &state) < 0) {
1951                 nlmsg_free(msg);
1952                 return -ENOBUFS;
1953         }
1954
1955         return genlmsg_reply(msg, info);
1956 }
1957
1958 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1959         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1960         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1961         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1962         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1963         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1964 };
1965
1966 static int parse_txq_params(struct nlattr *tb[],
1967                             struct ieee80211_txq_params *txq_params)
1968 {
1969         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1970             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1971             !tb[NL80211_TXQ_ATTR_AIFS])
1972                 return -EINVAL;
1973
1974         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1975         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1976         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1977         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1978         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1979
1980         if (txq_params->ac >= NL80211_NUM_ACS)
1981                 return -EINVAL;
1982
1983         return 0;
1984 }
1985
1986 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1987 {
1988         /*
1989          * You can only set the channel explicitly for WDS interfaces,
1990          * all others have their channel managed via their respective
1991          * "establish a connection" command (connect, join, ...)
1992          *
1993          * For AP/GO and mesh mode, the channel can be set with the
1994          * channel userspace API, but is only stored and passed to the
1995          * low-level driver when the AP starts or the mesh is joined.
1996          * This is for backward compatibility, userspace can also give
1997          * the channel in the start-ap or join-mesh commands instead.
1998          *
1999          * Monitors are special as they are normally slaved to
2000          * whatever else is going on, so they have their own special
2001          * operation to set the monitor channel if possible.
2002          */
2003         return !wdev ||
2004                 wdev->iftype == NL80211_IFTYPE_AP ||
2005                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2006                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2007                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2008 }
2009
2010 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2011                                  struct genl_info *info,
2012                                  struct cfg80211_chan_def *chandef)
2013 {
2014         u32 control_freq;
2015
2016         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2017                 return -EINVAL;
2018
2019         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2020
2021         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2022         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2023         chandef->center_freq1 = control_freq;
2024         chandef->center_freq2 = 0;
2025
2026         /* Primary channel not allowed */
2027         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2028                 return -EINVAL;
2029
2030         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2031                 enum nl80211_channel_type chantype;
2032
2033                 chantype = nla_get_u32(
2034                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2035
2036                 switch (chantype) {
2037                 case NL80211_CHAN_NO_HT:
2038                 case NL80211_CHAN_HT20:
2039                 case NL80211_CHAN_HT40PLUS:
2040                 case NL80211_CHAN_HT40MINUS:
2041                         cfg80211_chandef_create(chandef, chandef->chan,
2042                                                 chantype);
2043                         break;
2044                 default:
2045                         return -EINVAL;
2046                 }
2047         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2048                 chandef->width =
2049                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2050                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2051                         chandef->center_freq1 =
2052                                 nla_get_u32(
2053                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2054                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2055                         chandef->center_freq2 =
2056                                 nla_get_u32(
2057                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2058         }
2059
2060         if (!cfg80211_chandef_valid(chandef))
2061                 return -EINVAL;
2062
2063         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2064                                      IEEE80211_CHAN_DISABLED))
2065                 return -EINVAL;
2066
2067         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2068              chandef->width == NL80211_CHAN_WIDTH_10) &&
2069             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2070                 return -EINVAL;
2071
2072         return 0;
2073 }
2074
2075 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2076                                  struct net_device *dev,
2077                                  struct genl_info *info)
2078 {
2079         struct cfg80211_chan_def chandef;
2080         int result;
2081         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2082         struct wireless_dev *wdev = NULL;
2083
2084         if (dev)
2085                 wdev = dev->ieee80211_ptr;
2086         if (!nl80211_can_set_dev_channel(wdev))
2087                 return -EOPNOTSUPP;
2088         if (wdev)
2089                 iftype = wdev->iftype;
2090
2091         result = nl80211_parse_chandef(rdev, info, &chandef);
2092         if (result)
2093                 return result;
2094
2095         switch (iftype) {
2096         case NL80211_IFTYPE_AP:
2097         case NL80211_IFTYPE_P2P_GO:
2098                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2099                                                    iftype)) {
2100                         result = -EINVAL;
2101                         break;
2102                 }
2103                 if (wdev->beacon_interval) {
2104                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2105                             !(rdev->wiphy.features &
2106                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2107                                 result = -EBUSY;
2108                                 break;
2109                         }
2110
2111                         /* Only allow dynamic channel width changes */
2112                         if (chandef.chan != wdev->preset_chandef.chan) {
2113                                 result = -EBUSY;
2114                                 break;
2115                         }
2116                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2117                         if (result)
2118                                 break;
2119                 }
2120                 wdev->preset_chandef = chandef;
2121                 result = 0;
2122                 break;
2123         case NL80211_IFTYPE_MESH_POINT:
2124                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2125                 break;
2126         case NL80211_IFTYPE_MONITOR:
2127                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2128                 break;
2129         default:
2130                 result = -EINVAL;
2131         }
2132
2133         return result;
2134 }
2135
2136 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2137 {
2138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2139         struct net_device *netdev = info->user_ptr[1];
2140
2141         return __nl80211_set_channel(rdev, netdev, info);
2142 }
2143
2144 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2145 {
2146         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2147         struct net_device *dev = info->user_ptr[1];
2148         struct wireless_dev *wdev = dev->ieee80211_ptr;
2149         const u8 *bssid;
2150
2151         if (!info->attrs[NL80211_ATTR_MAC])
2152                 return -EINVAL;
2153
2154         if (netif_running(dev))
2155                 return -EBUSY;
2156
2157         if (!rdev->ops->set_wds_peer)
2158                 return -EOPNOTSUPP;
2159
2160         if (wdev->iftype != NL80211_IFTYPE_WDS)
2161                 return -EOPNOTSUPP;
2162
2163         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2164         return rdev_set_wds_peer(rdev, dev, bssid);
2165 }
2166
2167 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2168 {
2169         struct cfg80211_registered_device *rdev;
2170         struct net_device *netdev = NULL;
2171         struct wireless_dev *wdev;
2172         int result = 0, rem_txq_params = 0;
2173         struct nlattr *nl_txq_params;
2174         u32 changed;
2175         u8 retry_short = 0, retry_long = 0;
2176         u32 frag_threshold = 0, rts_threshold = 0;
2177         u8 coverage_class = 0;
2178
2179         ASSERT_RTNL();
2180
2181         /*
2182          * Try to find the wiphy and netdev. Normally this
2183          * function shouldn't need the netdev, but this is
2184          * done for backward compatibility -- previously
2185          * setting the channel was done per wiphy, but now
2186          * it is per netdev. Previous userland like hostapd
2187          * also passed a netdev to set_wiphy, so that it is
2188          * possible to let that go to the right netdev!
2189          */
2190
2191         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2192                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2193
2194                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2195                 if (netdev && netdev->ieee80211_ptr)
2196                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2197                 else
2198                         netdev = NULL;
2199         }
2200
2201         if (!netdev) {
2202                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2203                                                   info->attrs);
2204                 if (IS_ERR(rdev))
2205                         return PTR_ERR(rdev);
2206                 wdev = NULL;
2207                 netdev = NULL;
2208                 result = 0;
2209         } else
2210                 wdev = netdev->ieee80211_ptr;
2211
2212         /*
2213          * end workaround code, by now the rdev is available
2214          * and locked, and wdev may or may not be NULL.
2215          */
2216
2217         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2218                 result = cfg80211_dev_rename(
2219                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2220
2221         if (result)
2222                 return result;
2223
2224         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2225                 struct ieee80211_txq_params txq_params;
2226                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2227
2228                 if (!rdev->ops->set_txq_params)
2229                         return -EOPNOTSUPP;
2230
2231                 if (!netdev)
2232                         return -EINVAL;
2233
2234                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2235                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2236                         return -EINVAL;
2237
2238                 if (!netif_running(netdev))
2239                         return -ENETDOWN;
2240
2241                 nla_for_each_nested(nl_txq_params,
2242                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2243                                     rem_txq_params) {
2244                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2245                                            nla_data(nl_txq_params),
2246                                            nla_len(nl_txq_params),
2247                                            txq_params_policy);
2248                         if (result)
2249                                 return result;
2250                         result = parse_txq_params(tb, &txq_params);
2251                         if (result)
2252                                 return result;
2253
2254                         result = rdev_set_txq_params(rdev, netdev,
2255                                                      &txq_params);
2256                         if (result)
2257                                 return result;
2258                 }
2259         }
2260
2261         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2262                 result = __nl80211_set_channel(
2263                         rdev,
2264                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2265                         info);
2266                 if (result)
2267                         return result;
2268         }
2269
2270         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2271                 struct wireless_dev *txp_wdev = wdev;
2272                 enum nl80211_tx_power_setting type;
2273                 int idx, mbm = 0;
2274
2275                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2276                         txp_wdev = NULL;
2277
2278                 if (!rdev->ops->set_tx_power)
2279                         return -EOPNOTSUPP;
2280
2281                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2282                 type = nla_get_u32(info->attrs[idx]);
2283
2284                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2285                     (type != NL80211_TX_POWER_AUTOMATIC))
2286                         return -EINVAL;
2287
2288                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2289                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2290                         mbm = nla_get_u32(info->attrs[idx]);
2291                 }
2292
2293                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2294                 if (result)
2295                         return result;
2296         }
2297
2298         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2299             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2300                 u32 tx_ant, rx_ant;
2301
2302                 if ((!rdev->wiphy.available_antennas_tx &&
2303                      !rdev->wiphy.available_antennas_rx) ||
2304                     !rdev->ops->set_antenna)
2305                         return -EOPNOTSUPP;
2306
2307                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2308                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2309
2310                 /* reject antenna configurations which don't match the
2311                  * available antenna masks, except for the "all" mask */
2312                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2313                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2314                         return -EINVAL;
2315
2316                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2317                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2318
2319                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2320                 if (result)
2321                         return result;
2322         }
2323
2324         changed = 0;
2325
2326         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2327                 retry_short = nla_get_u8(
2328                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2329                 if (retry_short == 0)
2330                         return -EINVAL;
2331
2332                 changed |= WIPHY_PARAM_RETRY_SHORT;
2333         }
2334
2335         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2336                 retry_long = nla_get_u8(
2337                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2338                 if (retry_long == 0)
2339                         return -EINVAL;
2340
2341                 changed |= WIPHY_PARAM_RETRY_LONG;
2342         }
2343
2344         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2345                 frag_threshold = nla_get_u32(
2346                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2347                 if (frag_threshold < 256)
2348                         return -EINVAL;
2349
2350                 if (frag_threshold != (u32) -1) {
2351                         /*
2352                          * Fragments (apart from the last one) are required to
2353                          * have even length. Make the fragmentation code
2354                          * simpler by stripping LSB should someone try to use
2355                          * odd threshold value.
2356                          */
2357                         frag_threshold &= ~0x1;
2358                 }
2359                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2360         }
2361
2362         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2363                 rts_threshold = nla_get_u32(
2364                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2365                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2366         }
2367
2368         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2369                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2370                         return -EINVAL;
2371
2372                 coverage_class = nla_get_u8(
2373                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2374                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2375         }
2376
2377         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2378                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2379                         return -EOPNOTSUPP;
2380
2381                 changed |= WIPHY_PARAM_DYN_ACK;
2382         }
2383
2384         if (changed) {
2385                 u8 old_retry_short, old_retry_long;
2386                 u32 old_frag_threshold, old_rts_threshold;
2387                 u8 old_coverage_class;
2388
2389                 if (!rdev->ops->set_wiphy_params)
2390                         return -EOPNOTSUPP;
2391
2392                 old_retry_short = rdev->wiphy.retry_short;
2393                 old_retry_long = rdev->wiphy.retry_long;
2394                 old_frag_threshold = rdev->wiphy.frag_threshold;
2395                 old_rts_threshold = rdev->wiphy.rts_threshold;
2396                 old_coverage_class = rdev->wiphy.coverage_class;
2397
2398                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2399                         rdev->wiphy.retry_short = retry_short;
2400                 if (changed & WIPHY_PARAM_RETRY_LONG)
2401                         rdev->wiphy.retry_long = retry_long;
2402                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2403                         rdev->wiphy.frag_threshold = frag_threshold;
2404                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2405                         rdev->wiphy.rts_threshold = rts_threshold;
2406                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2407                         rdev->wiphy.coverage_class = coverage_class;
2408
2409                 result = rdev_set_wiphy_params(rdev, changed);
2410                 if (result) {
2411                         rdev->wiphy.retry_short = old_retry_short;
2412                         rdev->wiphy.retry_long = old_retry_long;
2413                         rdev->wiphy.frag_threshold = old_frag_threshold;
2414                         rdev->wiphy.rts_threshold = old_rts_threshold;
2415                         rdev->wiphy.coverage_class = old_coverage_class;
2416                         return result;
2417                 }
2418         }
2419         return 0;
2420 }
2421
2422 static inline u64 wdev_id(struct wireless_dev *wdev)
2423 {
2424         return (u64)wdev->identifier |
2425                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2426 }
2427
2428 static int nl80211_send_chandef(struct sk_buff *msg,
2429                                 const struct cfg80211_chan_def *chandef)
2430 {
2431         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2432                 return -EINVAL;
2433
2434         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2435                         chandef->chan->center_freq))
2436                 return -ENOBUFS;
2437         switch (chandef->width) {
2438         case NL80211_CHAN_WIDTH_20_NOHT:
2439         case NL80211_CHAN_WIDTH_20:
2440         case NL80211_CHAN_WIDTH_40:
2441                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2442                                 cfg80211_get_chandef_type(chandef)))
2443                         return -ENOBUFS;
2444                 break;
2445         default:
2446                 break;
2447         }
2448         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2449                 return -ENOBUFS;
2450         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2451                 return -ENOBUFS;
2452         if (chandef->center_freq2 &&
2453             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2454                 return -ENOBUFS;
2455         return 0;
2456 }
2457
2458 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2459                               struct cfg80211_registered_device *rdev,
2460                               struct wireless_dev *wdev, bool removal)
2461 {
2462         struct net_device *dev = wdev->netdev;
2463         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2464         void *hdr;
2465
2466         if (removal)
2467                 cmd = NL80211_CMD_DEL_INTERFACE;
2468
2469         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2470         if (!hdr)
2471                 return -1;
2472
2473         if (dev &&
2474             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2475              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2476                 goto nla_put_failure;
2477
2478         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2479             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2480             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2481                               NL80211_ATTR_PAD) ||
2482             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2483             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2484                         rdev->devlist_generation ^
2485                         (cfg80211_rdev_list_generation << 2)))
2486                 goto nla_put_failure;
2487
2488         if (rdev->ops->get_channel) {
2489                 int ret;
2490                 struct cfg80211_chan_def chandef;
2491
2492                 ret = rdev_get_channel(rdev, wdev, &chandef);
2493                 if (ret == 0) {
2494                         if (nl80211_send_chandef(msg, &chandef))
2495                                 goto nla_put_failure;
2496                 }
2497         }
2498
2499         if (rdev->ops->get_tx_power) {
2500                 int dbm, ret;
2501
2502                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2503                 if (ret == 0 &&
2504                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2505                                 DBM_TO_MBM(dbm)))
2506                         goto nla_put_failure;
2507         }
2508
2509         if (wdev->ssid_len) {
2510                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2511                         goto nla_put_failure;
2512         }
2513
2514         genlmsg_end(msg, hdr);
2515         return 0;
2516
2517  nla_put_failure:
2518         genlmsg_cancel(msg, hdr);
2519         return -EMSGSIZE;
2520 }
2521
2522 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2523 {
2524         int wp_idx = 0;
2525         int if_idx = 0;
2526         int wp_start = cb->args[0];
2527         int if_start = cb->args[1];
2528         struct cfg80211_registered_device *rdev;
2529         struct wireless_dev *wdev;
2530
2531         rtnl_lock();
2532         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2533                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2534                         continue;
2535                 if (wp_idx < wp_start) {
2536                         wp_idx++;
2537                         continue;
2538                 }
2539                 if_idx = 0;
2540
2541                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2542                         if (if_idx < if_start) {
2543                                 if_idx++;
2544                                 continue;
2545                         }
2546                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2547                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2548                                                rdev, wdev, false) < 0) {
2549                                 goto out;
2550                         }
2551                         if_idx++;
2552                 }
2553
2554                 wp_idx++;
2555         }
2556  out:
2557         rtnl_unlock();
2558
2559         cb->args[0] = wp_idx;
2560         cb->args[1] = if_idx;
2561
2562         return skb->len;
2563 }
2564
2565 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2566 {
2567         struct sk_buff *msg;
2568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2569         struct wireless_dev *wdev = info->user_ptr[1];
2570
2571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2572         if (!msg)
2573                 return -ENOMEM;
2574
2575         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2576                                rdev, wdev, false) < 0) {
2577                 nlmsg_free(msg);
2578                 return -ENOBUFS;
2579         }
2580
2581         return genlmsg_reply(msg, info);
2582 }
2583
2584 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2585         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2586         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2587         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2588         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2589         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2590         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2591 };
2592
2593 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2594 {
2595         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2596         int flag;
2597
2598         *mntrflags = 0;
2599
2600         if (!nla)
2601                 return -EINVAL;
2602
2603         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2604                              nla, mntr_flags_policy))
2605                 return -EINVAL;
2606
2607         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2608                 if (flags[flag])
2609                         *mntrflags |= (1<<flag);
2610
2611         return 0;
2612 }
2613
2614 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2615                                struct net_device *netdev, u8 use_4addr,
2616                                enum nl80211_iftype iftype)
2617 {
2618         if (!use_4addr) {
2619                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2620                         return -EBUSY;
2621                 return 0;
2622         }
2623
2624         switch (iftype) {
2625         case NL80211_IFTYPE_AP_VLAN:
2626                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2627                         return 0;
2628                 break;
2629         case NL80211_IFTYPE_STATION:
2630                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2631                         return 0;
2632                 break;
2633         default:
2634                 break;
2635         }
2636
2637         return -EOPNOTSUPP;
2638 }
2639
2640 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2641 {
2642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2643         struct vif_params params;
2644         int err;
2645         enum nl80211_iftype otype, ntype;
2646         struct net_device *dev = info->user_ptr[1];
2647         u32 _flags, *flags = NULL;
2648         bool change = false;
2649
2650         memset(&params, 0, sizeof(params));
2651
2652         otype = ntype = dev->ieee80211_ptr->iftype;
2653
2654         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2655                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2656                 if (otype != ntype)
2657                         change = true;
2658                 if (ntype > NL80211_IFTYPE_MAX)
2659                         return -EINVAL;
2660         }
2661
2662         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2663                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2664
2665                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2666                         return -EINVAL;
2667                 if (netif_running(dev))
2668                         return -EBUSY;
2669
2670                 wdev_lock(wdev);
2671                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2672                              IEEE80211_MAX_MESH_ID_LEN);
2673                 wdev->mesh_id_up_len =
2674                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2675                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2676                        wdev->mesh_id_up_len);
2677                 wdev_unlock(wdev);
2678         }
2679
2680         if (info->attrs[NL80211_ATTR_4ADDR]) {
2681                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2682                 change = true;
2683                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2684                 if (err)
2685                         return err;
2686         } else {
2687                 params.use_4addr = -1;
2688         }
2689
2690         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2691                 if (ntype != NL80211_IFTYPE_MONITOR)
2692                         return -EINVAL;
2693                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2694                                           &_flags);
2695                 if (err)
2696                         return err;
2697
2698                 flags = &_flags;
2699                 change = true;
2700         }
2701
2702         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2703                 const u8 *mumimo_groups;
2704                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2705
2706                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2707                         return -EOPNOTSUPP;
2708
2709                 mumimo_groups =
2710                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2711
2712                 /* bits 0 and 63 are reserved and must be zero */
2713                 if ((mumimo_groups[0] & BIT(7)) ||
2714                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2715                         return -EINVAL;
2716
2717                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2718                        VHT_MUMIMO_GROUPS_DATA_LEN);
2719                 change = true;
2720         }
2721
2722         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2723                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2724
2725                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2726                         return -EOPNOTSUPP;
2727
2728                 nla_memcpy(params.macaddr,
2729                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2730                            ETH_ALEN);
2731                 change = true;
2732         }
2733
2734         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2735             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2736                 return -EOPNOTSUPP;
2737
2738         if (change)
2739                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2740         else
2741                 err = 0;
2742
2743         if (!err && params.use_4addr != -1)
2744                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2745
2746         return err;
2747 }
2748
2749 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2750 {
2751         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2752         struct vif_params params;
2753         struct wireless_dev *wdev;
2754         struct sk_buff *msg;
2755         int err;
2756         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2757         u32 flags;
2758
2759         /* to avoid failing a new interface creation due to pending removal */
2760         cfg80211_destroy_ifaces(rdev);
2761
2762         memset(&params, 0, sizeof(params));
2763
2764         if (!info->attrs[NL80211_ATTR_IFNAME])
2765                 return -EINVAL;
2766
2767         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2768                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2769                 if (type > NL80211_IFTYPE_MAX)
2770                         return -EINVAL;
2771         }
2772
2773         if (!rdev->ops->add_virtual_intf ||
2774             !(rdev->wiphy.interface_modes & (1 << type)))
2775                 return -EOPNOTSUPP;
2776
2777         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2778              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2779             info->attrs[NL80211_ATTR_MAC]) {
2780                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2781                            ETH_ALEN);
2782                 if (!is_valid_ether_addr(params.macaddr))
2783                         return -EADDRNOTAVAIL;
2784         }
2785
2786         if (info->attrs[NL80211_ATTR_4ADDR]) {
2787                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2788                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2789                 if (err)
2790                         return err;
2791         }
2792
2793         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2794                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2795                                   &flags);
2796
2797         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2798             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2799                 return -EOPNOTSUPP;
2800
2801         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2802         if (!msg)
2803                 return -ENOMEM;
2804
2805         wdev = rdev_add_virtual_intf(rdev,
2806                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2807                                 NET_NAME_USER, type, err ? NULL : &flags,
2808                                 &params);
2809         if (WARN_ON(!wdev)) {
2810                 nlmsg_free(msg);
2811                 return -EPROTO;
2812         } else if (IS_ERR(wdev)) {
2813                 nlmsg_free(msg);
2814                 return PTR_ERR(wdev);
2815         }
2816
2817         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2818                 wdev->owner_nlportid = info->snd_portid;
2819
2820         switch (type) {
2821         case NL80211_IFTYPE_MESH_POINT:
2822                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2823                         break;
2824                 wdev_lock(wdev);
2825                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2826                              IEEE80211_MAX_MESH_ID_LEN);
2827                 wdev->mesh_id_up_len =
2828                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2829                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2830                        wdev->mesh_id_up_len);
2831                 wdev_unlock(wdev);
2832                 break;
2833         case NL80211_IFTYPE_P2P_DEVICE:
2834                 /*
2835                  * P2P Device doesn't have a netdev, so doesn't go
2836                  * through the netdev notifier and must be added here
2837                  */
2838                 mutex_init(&wdev->mtx);
2839                 INIT_LIST_HEAD(&wdev->event_list);
2840                 spin_lock_init(&wdev->event_lock);
2841                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2842                 spin_lock_init(&wdev->mgmt_registrations_lock);
2843
2844                 wdev->identifier = ++rdev->wdev_id;
2845                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2846                 rdev->devlist_generation++;
2847                 break;
2848         default:
2849                 break;
2850         }
2851
2852         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2853                                rdev, wdev, false) < 0) {
2854                 nlmsg_free(msg);
2855                 return -ENOBUFS;
2856         }
2857
2858         /*
2859          * For wdevs which have no associated netdev object (e.g. of type
2860          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2861          * For all other types, the event will be generated from the
2862          * netdev notifier
2863          */
2864         if (!wdev->netdev)
2865                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2866
2867         return genlmsg_reply(msg, info);
2868 }
2869
2870 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2871 {
2872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2873         struct wireless_dev *wdev = info->user_ptr[1];
2874
2875         if (!rdev->ops->del_virtual_intf)
2876                 return -EOPNOTSUPP;
2877
2878         /*
2879          * If we remove a wireless device without a netdev then clear
2880          * user_ptr[1] so that nl80211_post_doit won't dereference it
2881          * to check if it needs to do dev_put(). Otherwise it crashes
2882          * since the wdev has been freed, unlike with a netdev where
2883          * we need the dev_put() for the netdev to really be freed.
2884          */
2885         if (!wdev->netdev)
2886                 info->user_ptr[1] = NULL;
2887
2888         return rdev_del_virtual_intf(rdev, wdev);
2889 }
2890
2891 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2892 {
2893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2894         struct net_device *dev = info->user_ptr[1];
2895         u16 noack_map;
2896
2897         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2898                 return -EINVAL;
2899
2900         if (!rdev->ops->set_noack_map)
2901                 return -EOPNOTSUPP;
2902
2903         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2904
2905         return rdev_set_noack_map(rdev, dev, noack_map);
2906 }
2907
2908 struct get_key_cookie {
2909         struct sk_buff *msg;
2910         int error;
2911         int idx;
2912 };
2913
2914 static void get_key_callback(void *c, struct key_params *params)
2915 {
2916         struct nlattr *key;
2917         struct get_key_cookie *cookie = c;
2918
2919         if ((params->key &&
2920              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2921                      params->key_len, params->key)) ||
2922             (params->seq &&
2923              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2924                      params->seq_len, params->seq)) ||
2925             (params->cipher &&
2926              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2927                          params->cipher)))
2928                 goto nla_put_failure;
2929
2930         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2931         if (!key)
2932                 goto nla_put_failure;
2933
2934         if ((params->key &&
2935              nla_put(cookie->msg, NL80211_KEY_DATA,
2936                      params->key_len, params->key)) ||
2937             (params->seq &&
2938              nla_put(cookie->msg, NL80211_KEY_SEQ,
2939                      params->seq_len, params->seq)) ||
2940             (params->cipher &&
2941              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2942                          params->cipher)))
2943                 goto nla_put_failure;
2944
2945         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2946                 goto nla_put_failure;
2947
2948         nla_nest_end(cookie->msg, key);
2949
2950         return;
2951  nla_put_failure:
2952         cookie->error = 1;
2953 }
2954
2955 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2956 {
2957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2958         int err;
2959         struct net_device *dev = info->user_ptr[1];
2960         u8 key_idx = 0;
2961         const u8 *mac_addr = NULL;
2962         bool pairwise;
2963         struct get_key_cookie cookie = {
2964                 .error = 0,
2965         };
2966         void *hdr;
2967         struct sk_buff *msg;
2968
2969         if (info->attrs[NL80211_ATTR_KEY_IDX])
2970                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2971
2972         if (key_idx > 5)
2973                 return -EINVAL;
2974
2975         if (info->attrs[NL80211_ATTR_MAC])
2976                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2977
2978         pairwise = !!mac_addr;
2979         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2980                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2981
2982                 if (kt >= NUM_NL80211_KEYTYPES)
2983                         return -EINVAL;
2984                 if (kt != NL80211_KEYTYPE_GROUP &&
2985                     kt != NL80211_KEYTYPE_PAIRWISE)
2986                         return -EINVAL;
2987                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2988         }
2989
2990         if (!rdev->ops->get_key)
2991                 return -EOPNOTSUPP;
2992
2993         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2994                 return -ENOENT;
2995
2996         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2997         if (!msg)
2998                 return -ENOMEM;
2999
3000         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3001                              NL80211_CMD_NEW_KEY);
3002         if (!hdr)
3003                 goto nla_put_failure;
3004
3005         cookie.msg = msg;
3006         cookie.idx = key_idx;
3007
3008         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3009             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3010                 goto nla_put_failure;
3011         if (mac_addr &&
3012             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3013                 goto nla_put_failure;
3014
3015         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3016                            get_key_callback);
3017
3018         if (err)
3019                 goto free_msg;
3020
3021         if (cookie.error)
3022                 goto nla_put_failure;
3023
3024         genlmsg_end(msg, hdr);
3025         return genlmsg_reply(msg, info);
3026
3027  nla_put_failure:
3028         err = -ENOBUFS;
3029  free_msg:
3030         nlmsg_free(msg);
3031         return err;
3032 }
3033
3034 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3035 {
3036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3037         struct key_parse key;
3038         int err;
3039         struct net_device *dev = info->user_ptr[1];
3040
3041         err = nl80211_parse_key(info, &key);
3042         if (err)
3043                 return err;
3044
3045         if (key.idx < 0)
3046                 return -EINVAL;
3047
3048         /* only support setting default key */
3049         if (!key.def && !key.defmgmt)
3050                 return -EINVAL;
3051
3052         wdev_lock(dev->ieee80211_ptr);
3053
3054         if (key.def) {
3055                 if (!rdev->ops->set_default_key) {
3056                         err = -EOPNOTSUPP;
3057                         goto out;
3058                 }
3059
3060                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3061                 if (err)
3062                         goto out;
3063
3064                 err = rdev_set_default_key(rdev, dev, key.idx,
3065                                                  key.def_uni, key.def_multi);
3066
3067                 if (err)
3068                         goto out;
3069
3070 #ifdef CONFIG_CFG80211_WEXT
3071                 dev->ieee80211_ptr->wext.default_key = key.idx;
3072 #endif
3073         } else {
3074                 if (key.def_uni || !key.def_multi) {
3075                         err = -EINVAL;
3076                         goto out;
3077                 }
3078
3079                 if (!rdev->ops->set_default_mgmt_key) {
3080                         err = -EOPNOTSUPP;
3081                         goto out;
3082                 }
3083
3084                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3085                 if (err)
3086                         goto out;
3087
3088                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3089                 if (err)
3090                         goto out;
3091
3092 #ifdef CONFIG_CFG80211_WEXT
3093                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3094 #endif
3095         }
3096
3097  out:
3098         wdev_unlock(dev->ieee80211_ptr);
3099
3100         return err;
3101 }
3102
3103 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3104 {
3105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3106         int err;
3107         struct net_device *dev = info->user_ptr[1];
3108         struct key_parse key;
3109         const u8 *mac_addr = NULL;
3110
3111         err = nl80211_parse_key(info, &key);
3112         if (err)
3113                 return err;
3114
3115         if (!key.p.key)
3116                 return -EINVAL;
3117
3118         if (info->attrs[NL80211_ATTR_MAC])
3119                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3120
3121         if (key.type == -1) {
3122                 if (mac_addr)
3123                         key.type = NL80211_KEYTYPE_PAIRWISE;
3124                 else
3125                         key.type = NL80211_KEYTYPE_GROUP;
3126         }
3127
3128         /* for now */
3129         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3130             key.type != NL80211_KEYTYPE_GROUP)
3131                 return -EINVAL;
3132
3133         if (!rdev->ops->add_key)
3134                 return -EOPNOTSUPP;
3135
3136         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3137                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3138                                            mac_addr))
3139                 return -EINVAL;
3140
3141         wdev_lock(dev->ieee80211_ptr);
3142         err = nl80211_key_allowed(dev->ieee80211_ptr);
3143         if (!err)
3144                 err = rdev_add_key(rdev, dev, key.idx,
3145                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3146                                     mac_addr, &key.p);
3147         wdev_unlock(dev->ieee80211_ptr);
3148
3149         return err;
3150 }
3151
3152 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3153 {
3154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3155         int err;
3156         struct net_device *dev = info->user_ptr[1];
3157         u8 *mac_addr = NULL;
3158         struct key_parse key;
3159
3160         err = nl80211_parse_key(info, &key);
3161         if (err)
3162                 return err;
3163
3164         if (info->attrs[NL80211_ATTR_MAC])
3165                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3166
3167         if (key.type == -1) {
3168                 if (mac_addr)
3169                         key.type = NL80211_KEYTYPE_PAIRWISE;
3170                 else
3171                         key.type = NL80211_KEYTYPE_GROUP;
3172         }
3173
3174         /* for now */
3175         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3176             key.type != NL80211_KEYTYPE_GROUP)
3177                 return -EINVAL;
3178
3179         if (!rdev->ops->del_key)
3180                 return -EOPNOTSUPP;
3181
3182         wdev_lock(dev->ieee80211_ptr);
3183         err = nl80211_key_allowed(dev->ieee80211_ptr);
3184
3185         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3186             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3187                 err = -ENOENT;
3188
3189         if (!err)
3190                 err = rdev_del_key(rdev, dev, key.idx,
3191                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3192                                    mac_addr);
3193
3194 #ifdef CONFIG_CFG80211_WEXT
3195         if (!err) {
3196                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3197                         dev->ieee80211_ptr->wext.default_key = -1;
3198                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3199                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3200         }
3201 #endif
3202         wdev_unlock(dev->ieee80211_ptr);
3203
3204         return err;
3205 }
3206
3207 /* This function returns an error or the number of nested attributes */
3208 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3209 {
3210         struct nlattr *attr;
3211         int n_entries = 0, tmp;
3212
3213         nla_for_each_nested(attr, nl_attr, tmp) {
3214                 if (nla_len(attr) != ETH_ALEN)
3215                         return -EINVAL;
3216
3217                 n_entries++;
3218         }
3219
3220         return n_entries;
3221 }
3222
3223 /*
3224  * This function parses ACL information and allocates memory for ACL data.
3225  * On successful return, the calling function is responsible to free the
3226  * ACL buffer returned by this function.
3227  */
3228 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3229                                                 struct genl_info *info)
3230 {
3231         enum nl80211_acl_policy acl_policy;
3232         struct nlattr *attr;
3233         struct cfg80211_acl_data *acl;
3234         int i = 0, n_entries, tmp;
3235
3236         if (!wiphy->max_acl_mac_addrs)
3237                 return ERR_PTR(-EOPNOTSUPP);
3238
3239         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3240                 return ERR_PTR(-EINVAL);
3241
3242         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3243         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3244             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3245                 return ERR_PTR(-EINVAL);
3246
3247         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3248                 return ERR_PTR(-EINVAL);
3249
3250         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3251         if (n_entries < 0)
3252                 return ERR_PTR(n_entries);
3253
3254         if (n_entries > wiphy->max_acl_mac_addrs)
3255                 return ERR_PTR(-ENOTSUPP);
3256
3257         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3258                       GFP_KERNEL);
3259         if (!acl)
3260                 return ERR_PTR(-ENOMEM);
3261
3262         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3263                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3264                 i++;
3265         }
3266
3267         acl->n_acl_entries = n_entries;
3268         acl->acl_policy = acl_policy;
3269
3270         return acl;
3271 }
3272
3273 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3274 {
3275         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3276         struct net_device *dev = info->user_ptr[1];
3277         struct cfg80211_acl_data *acl;
3278         int err;
3279
3280         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3281             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3282                 return -EOPNOTSUPP;
3283
3284         if (!dev->ieee80211_ptr->beacon_interval)
3285                 return -EINVAL;
3286
3287         acl = parse_acl_data(&rdev->wiphy, info);
3288         if (IS_ERR(acl))
3289                 return PTR_ERR(acl);
3290
3291         err = rdev_set_mac_acl(rdev, dev, acl);
3292
3293         kfree(acl);
3294
3295         return err;
3296 }
3297
3298 static int nl80211_parse_beacon(struct nlattr *attrs[],
3299                                 struct cfg80211_beacon_data *bcn)
3300 {
3301         bool haveinfo = false;
3302
3303         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3304             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3305             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3306             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3307                 return -EINVAL;
3308
3309         memset(bcn, 0, sizeof(*bcn));
3310
3311         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3312                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3313                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3314                 if (!bcn->head_len)
3315                         return -EINVAL;
3316                 haveinfo = true;
3317         }
3318
3319         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3320                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3321                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3322                 haveinfo = true;
3323         }
3324
3325         if (!haveinfo)
3326                 return -EINVAL;
3327
3328         if (attrs[NL80211_ATTR_IE]) {
3329                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3330                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3331         }
3332
3333         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3334                 bcn->proberesp_ies =
3335                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3336                 bcn->proberesp_ies_len =
3337                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3338         }
3339
3340         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3341                 bcn->assocresp_ies =
3342                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3343                 bcn->assocresp_ies_len =
3344                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3345         }
3346
3347         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3348                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3349                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3350         }
3351
3352         return 0;
3353 }
3354
3355 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3356                                    struct cfg80211_ap_settings *params)
3357 {
3358         struct wireless_dev *wdev;
3359         bool ret = false;
3360
3361         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3362                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3363                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3364                         continue;
3365
3366                 if (!wdev->preset_chandef.chan)
3367                         continue;
3368
3369                 params->chandef = wdev->preset_chandef;
3370                 ret = true;
3371                 break;
3372         }
3373
3374         return ret;
3375 }
3376
3377 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3378                                     enum nl80211_auth_type auth_type,
3379                                     enum nl80211_commands cmd)
3380 {
3381         if (auth_type > NL80211_AUTHTYPE_MAX)
3382                 return false;
3383
3384         switch (cmd) {
3385         case NL80211_CMD_AUTHENTICATE:
3386                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3387                     auth_type == NL80211_AUTHTYPE_SAE)
3388                         return false;
3389                 return true;
3390         case NL80211_CMD_CONNECT:
3391         case NL80211_CMD_START_AP:
3392                 /* SAE not supported yet */
3393                 if (auth_type == NL80211_AUTHTYPE_SAE)
3394                         return false;
3395                 return true;
3396         default:
3397                 return false;
3398         }
3399 }
3400
3401 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3402 {
3403         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3404         struct net_device *dev = info->user_ptr[1];
3405         struct wireless_dev *wdev = dev->ieee80211_ptr;
3406         struct cfg80211_ap_settings params;
3407         int err;
3408
3409         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3410             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3411                 return -EOPNOTSUPP;
3412
3413         if (!rdev->ops->start_ap)
3414                 return -EOPNOTSUPP;
3415
3416         if (wdev->beacon_interval)
3417                 return -EALREADY;
3418
3419         memset(&params, 0, sizeof(params));
3420
3421         /* these are required for START_AP */
3422         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3423             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3424             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3425                 return -EINVAL;
3426
3427         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3428         if (err)
3429                 return err;
3430
3431         params.beacon_interval =
3432                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3433         params.dtim_period =
3434                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3435
3436         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3437         if (err)
3438                 return err;
3439
3440         /*
3441          * In theory, some of these attributes should be required here
3442          * but since they were not used when the command was originally
3443          * added, keep them optional for old user space programs to let
3444          * them continue to work with drivers that do not need the
3445          * additional information -- drivers must check!
3446          */
3447         if (info->attrs[NL80211_ATTR_SSID]) {
3448                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3449                 params.ssid_len =
3450                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3451                 if (params.ssid_len == 0 ||
3452                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3453                         return -EINVAL;
3454         }
3455
3456         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3457                 params.hidden_ssid = nla_get_u32(
3458                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3459                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3460                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3461                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3462                         return -EINVAL;
3463         }
3464
3465         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3466
3467         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3468                 params.auth_type = nla_get_u32(
3469                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3470                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3471                                              NL80211_CMD_START_AP))
3472                         return -EINVAL;
3473         } else
3474                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3475
3476         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3477                                       NL80211_MAX_NR_CIPHER_SUITES);
3478         if (err)
3479                 return err;
3480
3481         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3482                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3483                         return -EOPNOTSUPP;
3484                 params.inactivity_timeout = nla_get_u16(
3485                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3486         }
3487
3488         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3489                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3490                         return -EINVAL;
3491                 params.p2p_ctwindow =
3492                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3493                 if (params.p2p_ctwindow > 127)
3494                         return -EINVAL;
3495                 if (params.p2p_ctwindow != 0 &&
3496                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3497                         return -EINVAL;
3498         }
3499
3500         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3501                 u8 tmp;
3502
3503                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3504                         return -EINVAL;
3505                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3506                 if (tmp > 1)
3507                         return -EINVAL;
3508                 params.p2p_opp_ps = tmp;
3509                 if (params.p2p_opp_ps != 0 &&
3510                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3511                         return -EINVAL;
3512         }
3513
3514         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3515                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3516                 if (err)
3517                         return err;
3518         } else if (wdev->preset_chandef.chan) {
3519                 params.chandef = wdev->preset_chandef;
3520         } else if (!nl80211_get_ap_channel(rdev, &params))
3521                 return -EINVAL;
3522
3523         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3524                                            wdev->iftype))
3525                 return -EINVAL;
3526
3527         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3528                 params.smps_mode =
3529                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3530                 switch (params.smps_mode) {
3531                 case NL80211_SMPS_OFF:
3532                         break;
3533                 case NL80211_SMPS_STATIC:
3534                         if (!(rdev->wiphy.features &
3535                               NL80211_FEATURE_STATIC_SMPS))
3536                                 return -EINVAL;
3537                         break;
3538                 case NL80211_SMPS_DYNAMIC:
3539                         if (!(rdev->wiphy.features &
3540                               NL80211_FEATURE_DYNAMIC_SMPS))
3541                                 return -EINVAL;
3542                         break;
3543                 default:
3544                         return -EINVAL;
3545                 }
3546         } else {
3547                 params.smps_mode = NL80211_SMPS_OFF;
3548         }
3549
3550         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3551         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3552                 return -EOPNOTSUPP;
3553
3554         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3555                 params.acl = parse_acl_data(&rdev->wiphy, info);
3556                 if (IS_ERR(params.acl))
3557                         return PTR_ERR(params.acl);
3558         }
3559
3560         wdev_lock(wdev);
3561         err = rdev_start_ap(rdev, dev, &params);
3562         if (!err) {
3563                 wdev->preset_chandef = params.chandef;
3564                 wdev->beacon_interval = params.beacon_interval;
3565                 wdev->chandef = params.chandef;
3566                 wdev->ssid_len = params.ssid_len;
3567                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3568         }
3569         wdev_unlock(wdev);
3570
3571         kfree(params.acl);
3572
3573         return err;
3574 }
3575
3576 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3577 {
3578         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3579         struct net_device *dev = info->user_ptr[1];
3580         struct wireless_dev *wdev = dev->ieee80211_ptr;
3581         struct cfg80211_beacon_data params;
3582         int err;
3583
3584         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3585             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3586                 return -EOPNOTSUPP;
3587
3588         if (!rdev->ops->change_beacon)
3589                 return -EOPNOTSUPP;
3590
3591         if (!wdev->beacon_interval)
3592                 return -EINVAL;
3593
3594         err = nl80211_parse_beacon(info->attrs, &params);
3595         if (err)
3596                 return err;
3597
3598         wdev_lock(wdev);
3599         err = rdev_change_beacon(rdev, dev, &params);
3600         wdev_unlock(wdev);
3601
3602         return err;
3603 }
3604
3605 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3606 {
3607         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3608         struct net_device *dev = info->user_ptr[1];
3609
3610         return cfg80211_stop_ap(rdev, dev, false);
3611 }
3612
3613 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3614         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3615         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3616         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3617         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3618         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3619         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3620 };
3621
3622 static int parse_station_flags(struct genl_info *info,
3623                                enum nl80211_iftype iftype,
3624                                struct station_parameters *params)
3625 {
3626         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3627         struct nlattr *nla;
3628         int flag;
3629
3630         /*
3631          * Try parsing the new attribute first so userspace
3632          * can specify both for older kernels.
3633          */
3634         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3635         if (nla) {
3636                 struct nl80211_sta_flag_update *sta_flags;
3637
3638                 sta_flags = nla_data(nla);
3639                 params->sta_flags_mask = sta_flags->mask;
3640                 params->sta_flags_set = sta_flags->set;
3641                 params->sta_flags_set &= params->sta_flags_mask;
3642                 if ((params->sta_flags_mask |
3643                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3644                         return -EINVAL;
3645                 return 0;
3646         }
3647
3648         /* if present, parse the old attribute */
3649
3650         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3651         if (!nla)
3652                 return 0;
3653
3654         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3655                              nla, sta_flags_policy))
3656                 return -EINVAL;
3657
3658         /*
3659          * Only allow certain flags for interface types so that
3660          * other attributes are silently ignored. Remember that
3661          * this is backward compatibility code with old userspace
3662          * and shouldn't be hit in other cases anyway.
3663          */
3664         switch (iftype) {
3665         case NL80211_IFTYPE_AP:
3666         case NL80211_IFTYPE_AP_VLAN:
3667         case NL80211_IFTYPE_P2P_GO:
3668                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3669                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3670                                          BIT(NL80211_STA_FLAG_WME) |
3671                                          BIT(NL80211_STA_FLAG_MFP);
3672                 break;
3673         case NL80211_IFTYPE_P2P_CLIENT:
3674         case NL80211_IFTYPE_STATION:
3675                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3676                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3677                 break;
3678         case NL80211_IFTYPE_MESH_POINT:
3679                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3680                                          BIT(NL80211_STA_FLAG_MFP) |
3681                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3682         default:
3683                 return -EINVAL;
3684         }
3685
3686         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3687                 if (flags[flag]) {
3688                         params->sta_flags_set |= (1<<flag);
3689
3690                         /* no longer support new API additions in old API */
3691                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3692                                 return -EINVAL;
3693                 }
3694         }
3695
3696         return 0;
3697 }
3698
3699 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3700                                  int attr)
3701 {
3702         struct nlattr *rate;
3703         u32 bitrate;
3704         u16 bitrate_compat;
3705         enum nl80211_attrs rate_flg;
3706
3707         rate = nla_nest_start(msg, attr);
3708         if (!rate)
3709                 return false;
3710
3711         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3712         bitrate = cfg80211_calculate_bitrate(info);
3713         /* report 16-bit bitrate only if we can */
3714         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3715         if (bitrate > 0 &&
3716             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3717                 return false;
3718         if (bitrate_compat > 0 &&
3719             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3720                 return false;
3721
3722         switch (info->bw) {
3723         case RATE_INFO_BW_5:
3724                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3725                 break;
3726         case RATE_INFO_BW_10:
3727                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3728                 break;
3729         default:
3730                 WARN_ON(1);
3731                 /* fall through */
3732         case RATE_INFO_BW_20:
3733                 rate_flg = 0;
3734                 break;
3735         case RATE_INFO_BW_40:
3736                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3737                 break;
3738         case RATE_INFO_BW_80:
3739                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3740                 break;
3741         case RATE_INFO_BW_160:
3742                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3743                 break;
3744         }
3745
3746         if (rate_flg && nla_put_flag(msg, rate_flg))
3747                 return false;
3748
3749         if (info->flags & RATE_INFO_FLAGS_MCS) {
3750                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3751                         return false;
3752                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3753                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3754                         return false;
3755         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3756                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3757                         return false;
3758                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3759                         return false;
3760                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3761                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3762                         return false;
3763         }
3764
3765         nla_nest_end(msg, rate);
3766         return true;
3767 }
3768
3769 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3770                                int id)
3771 {
3772         void *attr;
3773         int i = 0;
3774
3775         if (!mask)
3776                 return true;
3777
3778         attr = nla_nest_start(msg, id);
3779         if (!attr)
3780                 return false;
3781
3782         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3783                 if (!(mask & BIT(i)))
3784                         continue;
3785
3786                 if (nla_put_u8(msg, i, signal[i]))
3787                         return false;
3788         }
3789
3790         nla_nest_end(msg, attr);
3791
3792         return true;
3793 }
3794
3795 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3796                                 u32 seq, int flags,
3797                                 struct cfg80211_registered_device *rdev,
3798                                 struct net_device *dev,
3799                                 const u8 *mac_addr, struct station_info *sinfo)
3800 {
3801         void *hdr;
3802         struct nlattr *sinfoattr, *bss_param;
3803
3804         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3805         if (!hdr)
3806                 return -1;
3807
3808         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3809             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3810             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3811                 goto nla_put_failure;
3812
3813         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3814         if (!sinfoattr)
3815                 goto nla_put_failure;
3816
3817 #define PUT_SINFO(attr, memb, type) do {                                \
3818         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3819         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3820             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3821                              sinfo->memb))                              \
3822                 goto nla_put_failure;                                   \
3823         } while (0)
3824 #define PUT_SINFO_U64(attr, memb) do {                                  \
3825         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3826             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3827                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3828                 goto nla_put_failure;                                   \
3829         } while (0)
3830
3831         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3832         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3833
3834         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3835                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3836             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3837                         (u32)sinfo->rx_bytes))
3838                 goto nla_put_failure;
3839
3840         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3841                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3842             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3843                         (u32)sinfo->tx_bytes))
3844                 goto nla_put_failure;
3845
3846         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3847         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3848         PUT_SINFO(LLID, llid, u16);
3849         PUT_SINFO(PLID, plid, u16);
3850         PUT_SINFO(PLINK_STATE, plink_state, u8);
3851         PUT_SINFO_U64(RX_DURATION, rx_duration);
3852
3853         switch (rdev->wiphy.signal_type) {
3854         case CFG80211_SIGNAL_TYPE_MBM:
3855                 PUT_SINFO(SIGNAL, signal, u8);
3856                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3857                 break;
3858         default:
3859                 break;
3860         }
3861         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3862                 if (!nl80211_put_signal(msg, sinfo->chains,
3863                                         sinfo->chain_signal,
3864                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3865                         goto nla_put_failure;
3866         }
3867         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3868                 if (!nl80211_put_signal(msg, sinfo->chains,
3869                                         sinfo->chain_signal_avg,
3870                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3871                         goto nla_put_failure;
3872         }
3873         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3874                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3875                                           NL80211_STA_INFO_TX_BITRATE))
3876                         goto nla_put_failure;
3877         }
3878         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3879                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3880                                           NL80211_STA_INFO_RX_BITRATE))
3881                         goto nla_put_failure;
3882         }
3883
3884         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3885         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3886         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3887         PUT_SINFO(TX_FAILED, tx_failed, u32);
3888         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3889         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3890         PUT_SINFO(LOCAL_PM, local_pm, u32);
3891         PUT_SINFO(PEER_PM, peer_pm, u32);
3892         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3893
3894         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3895                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3896                 if (!bss_param)
3897                         goto nla_put_failure;
3898
3899                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3900                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3901                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3902                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3903                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3904                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3905                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3906                                sinfo->bss_param.dtim_period) ||
3907                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3908                                 sinfo->bss_param.beacon_interval))
3909                         goto nla_put_failure;
3910
3911                 nla_nest_end(msg, bss_param);
3912         }
3913         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3914             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3915                     sizeof(struct nl80211_sta_flag_update),
3916                     &sinfo->sta_flags))
3917                 goto nla_put_failure;
3918
3919         PUT_SINFO_U64(T_OFFSET, t_offset);
3920         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3921         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3922         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3923
3924 #undef PUT_SINFO
3925 #undef PUT_SINFO_U64
3926
3927         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3928                 struct nlattr *tidsattr;
3929                 int tid;
3930
3931                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3932                 if (!tidsattr)
3933                         goto nla_put_failure;
3934
3935                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3936                         struct cfg80211_tid_stats *tidstats;
3937                         struct nlattr *tidattr;
3938
3939                         tidstats = &sinfo->pertid[tid];
3940
3941                         if (!tidstats->filled)
3942                                 continue;
3943
3944                         tidattr = nla_nest_start(msg, tid + 1);
3945                         if (!tidattr)
3946                                 goto nla_put_failure;
3947
3948 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3949         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3950             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3951                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3952                 goto nla_put_failure;                                   \
3953         } while (0)
3954
3955                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3956                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3957                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3958                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3959
3960 #undef PUT_TIDVAL_U64
3961                         nla_nest_end(msg, tidattr);
3962                 }
3963
3964                 nla_nest_end(msg, tidsattr);
3965         }
3966
3967         nla_nest_end(msg, sinfoattr);
3968
3969         if (sinfo->assoc_req_ies_len &&
3970             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3971                     sinfo->assoc_req_ies))
3972                 goto nla_put_failure;
3973
3974         genlmsg_end(msg, hdr);
3975         return 0;
3976
3977  nla_put_failure:
3978         genlmsg_cancel(msg, hdr);
3979         return -EMSGSIZE;
3980 }
3981
3982 static int nl80211_dump_station(struct sk_buff *skb,
3983                                 struct netlink_callback *cb)
3984 {
3985         struct station_info sinfo;
3986         struct cfg80211_registered_device *rdev;
3987         struct wireless_dev *wdev;
3988         u8 mac_addr[ETH_ALEN];
3989         int sta_idx = cb->args[2];
3990         int err;
3991
3992         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3993         if (err)
3994                 return err;
3995
3996         if (!wdev->netdev) {
3997                 err = -EINVAL;
3998                 goto out_err;
3999         }
4000
4001         if (!rdev->ops->dump_station) {
4002                 err = -EOPNOTSUPP;
4003                 goto out_err;
4004         }
4005
4006         while (1) {
4007                 memset(&sinfo, 0, sizeof(sinfo));
4008                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4009                                         mac_addr, &sinfo);
4010                 if (err == -ENOENT)
4011                         break;
4012                 if (err)
4013                         goto out_err;
4014
4015                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4016                                 NETLINK_CB(cb->skb).portid,
4017                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4018                                 rdev, wdev->netdev, mac_addr,
4019                                 &sinfo) < 0)
4020                         goto out;
4021
4022                 sta_idx++;
4023         }
4024
4025  out:
4026         cb->args[2] = sta_idx;
4027         err = skb->len;
4028  out_err:
4029         nl80211_finish_wdev_dump(rdev);
4030
4031         return err;
4032 }
4033
4034 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4035 {
4036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4037         struct net_device *dev = info->user_ptr[1];
4038         struct station_info sinfo;
4039         struct sk_buff *msg;
4040         u8 *mac_addr = NULL;
4041         int err;
4042
4043         memset(&sinfo, 0, sizeof(sinfo));
4044
4045         if (!info->attrs[NL80211_ATTR_MAC])
4046                 return -EINVAL;
4047
4048         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4049
4050         if (!rdev->ops->get_station)
4051                 return -EOPNOTSUPP;
4052
4053         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4054         if (err)
4055                 return err;
4056
4057         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4058         if (!msg)
4059                 return -ENOMEM;
4060
4061         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4062                                  info->snd_portid, info->snd_seq, 0,
4063                                  rdev, dev, mac_addr, &sinfo) < 0) {
4064                 nlmsg_free(msg);
4065                 return -ENOBUFS;
4066         }
4067
4068         return genlmsg_reply(msg, info);
4069 }
4070
4071 int cfg80211_check_station_change(struct wiphy *wiphy,
4072                                   struct station_parameters *params,
4073                                   enum cfg80211_station_type statype)
4074 {
4075         if (params->listen_interval != -1 &&
4076             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4077                 return -EINVAL;
4078
4079         if (params->support_p2p_ps != -1 &&
4080             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4081                 return -EINVAL;
4082
4083         if (params->aid &&
4084             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4085             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4086                 return -EINVAL;
4087
4088         /* When you run into this, adjust the code below for the new flag */
4089         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4090
4091         switch (statype) {
4092         case CFG80211_STA_MESH_PEER_KERNEL:
4093         case CFG80211_STA_MESH_PEER_USER:
4094                 /*
4095                  * No ignoring the TDLS flag here -- the userspace mesh
4096                  * code doesn't have the bug of including TDLS in the
4097                  * mask everywhere.
4098                  */
4099                 if (params->sta_flags_mask &
4100                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4101                                   BIT(NL80211_STA_FLAG_MFP) |
4102                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4103                         return -EINVAL;
4104                 break;
4105         case CFG80211_STA_TDLS_PEER_SETUP:
4106         case CFG80211_STA_TDLS_PEER_ACTIVE:
4107                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4108                         return -EINVAL;
4109                 /* ignore since it can't change */
4110                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4111                 break;
4112         default:
4113                 /* disallow mesh-specific things */
4114                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4115                         return -EINVAL;
4116                 if (params->local_pm)
4117                         return -EINVAL;
4118                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4119                         return -EINVAL;
4120         }
4121
4122         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4123             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4124                 /* TDLS can't be set, ... */
4125                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4126                         return -EINVAL;
4127                 /*
4128                  * ... but don't bother the driver with it. This works around
4129                  * a hostapd/wpa_supplicant issue -- it always includes the
4130                  * TLDS_PEER flag in the mask even for AP mode.
4131                  */
4132                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4133         }
4134
4135         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4136             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4137                 /* reject other things that can't change */
4138                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4139                         return -EINVAL;
4140                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4141                         return -EINVAL;
4142                 if (params->supported_rates)
4143                         return -EINVAL;
4144                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4145                         return -EINVAL;
4146         }
4147
4148         if (statype != CFG80211_STA_AP_CLIENT &&
4149             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4150                 if (params->vlan)
4151                         return -EINVAL;
4152         }
4153
4154         switch (statype) {
4155         case CFG80211_STA_AP_MLME_CLIENT:
4156                 /* Use this only for authorizing/unauthorizing a station */
4157                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4158                         return -EOPNOTSUPP;
4159                 break;
4160         case CFG80211_STA_AP_CLIENT:
4161         case CFG80211_STA_AP_CLIENT_UNASSOC:
4162                 /* accept only the listed bits */
4163                 if (params->sta_flags_mask &
4164                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4165                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4166                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4167                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4168                                   BIT(NL80211_STA_FLAG_WME) |
4169                                   BIT(NL80211_STA_FLAG_MFP)))
4170                         return -EINVAL;
4171
4172                 /* but authenticated/associated only if driver handles it */
4173                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4174                     params->sta_flags_mask &
4175                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4176                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4177                         return -EINVAL;
4178                 break;
4179         case CFG80211_STA_IBSS:
4180         case CFG80211_STA_AP_STA:
4181                 /* reject any changes other than AUTHORIZED */
4182                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4183                         return -EINVAL;
4184                 break;
4185         case CFG80211_STA_TDLS_PEER_SETUP:
4186                 /* reject any changes other than AUTHORIZED or WME */
4187                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4188                                                BIT(NL80211_STA_FLAG_WME)))
4189                         return -EINVAL;
4190                 /* force (at least) rates when authorizing */
4191                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4192                     !params->supported_rates)
4193                         return -EINVAL;
4194                 break;
4195         case CFG80211_STA_TDLS_PEER_ACTIVE:
4196                 /* reject any changes */
4197                 return -EINVAL;
4198         case CFG80211_STA_MESH_PEER_KERNEL:
4199                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4200                         return -EINVAL;
4201                 break;
4202         case CFG80211_STA_MESH_PEER_USER:
4203                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4204                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4205                         return -EINVAL;
4206                 break;
4207         }
4208
4209         return 0;
4210 }
4211 EXPORT_SYMBOL(cfg80211_check_station_change);
4212
4213 /*
4214  * Get vlan interface making sure it is running and on the right wiphy.
4215  */
4216 static struct net_device *get_vlan(struct genl_info *info,
4217                                    struct cfg80211_registered_device *rdev)
4218 {
4219         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4220         struct net_device *v;
4221         int ret;
4222
4223         if (!vlanattr)
4224                 return NULL;
4225
4226         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4227         if (!v)
4228                 return ERR_PTR(-ENODEV);
4229
4230         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4231                 ret = -EINVAL;
4232                 goto error;
4233         }
4234
4235         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4236             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4237             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4238                 ret = -EINVAL;
4239                 goto error;
4240         }
4241
4242         if (!netif_running(v)) {
4243                 ret = -ENETDOWN;
4244                 goto error;
4245         }
4246
4247         return v;
4248  error:
4249         dev_put(v);
4250         return ERR_PTR(ret);
4251 }
4252
4253 static const struct nla_policy
4254 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4255         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4256         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4257 };
4258
4259 static int nl80211_parse_sta_wme(struct genl_info *info,
4260                                  struct station_parameters *params)
4261 {
4262         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4263         struct nlattr *nla;
4264         int err;
4265
4266         /* parse WME attributes if present */
4267         if (!info->attrs[NL80211_ATTR_STA_WME])
4268                 return 0;
4269
4270         nla = info->attrs[NL80211_ATTR_STA_WME];
4271         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4272                                nl80211_sta_wme_policy);
4273         if (err)
4274                 return err;
4275
4276         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4277                 params->uapsd_queues = nla_get_u8(
4278                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4279         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4280                 return -EINVAL;
4281
4282         if (tb[NL80211_STA_WME_MAX_SP])
4283                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4284
4285         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4286                 return -EINVAL;
4287
4288         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4289
4290         return 0;
4291 }
4292
4293 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4294                                       struct station_parameters *params)
4295 {
4296         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4297                 params->supported_channels =
4298                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4299                 params->supported_channels_len =
4300                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4301                 /*
4302                  * Need to include at least one (first channel, number of
4303                  * channels) tuple for each subband, and must have proper
4304                  * tuples for the rest of the data as well.
4305                  */
4306                 if (params->supported_channels_len < 2)
4307                         return -EINVAL;
4308                 if (params->supported_channels_len % 2)
4309                         return -EINVAL;
4310         }
4311
4312         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4313                 params->supported_oper_classes =
4314                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4315                 params->supported_oper_classes_len =
4316                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4317                 /*
4318                  * The value of the Length field of the Supported Operating
4319                  * Classes element is between 2 and 253.
4320                  */
4321                 if (params->supported_oper_classes_len < 2 ||
4322                     params->supported_oper_classes_len > 253)
4323                         return -EINVAL;
4324         }
4325         return 0;
4326 }
4327
4328 static int nl80211_set_station_tdls(struct genl_info *info,
4329                                     struct station_parameters *params)
4330 {
4331         int err;
4332         /* Dummy STA entry gets updated once the peer capabilities are known */
4333         if (info->attrs[NL80211_ATTR_PEER_AID])
4334                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4335         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4336                 params->ht_capa =
4337                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4338         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4339                 params->vht_capa =
4340                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4341
4342         err = nl80211_parse_sta_channel_info(info, params);
4343         if (err)
4344                 return err;
4345
4346         return nl80211_parse_sta_wme(info, params);
4347 }
4348
4349 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4350 {
4351         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4352         struct net_device *dev = info->user_ptr[1];
4353         struct station_parameters params;
4354         u8 *mac_addr;
4355         int err;
4356
4357         memset(&params, 0, sizeof(params));
4358
4359         if (!rdev->ops->change_station)
4360                 return -EOPNOTSUPP;
4361
4362         /*
4363          * AID and listen_interval properties can be set only for unassociated
4364          * station. Include these parameters here and will check them in
4365          * cfg80211_check_station_change().
4366          */
4367         if (info->attrs[NL80211_ATTR_STA_AID])
4368                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4369
4370         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4371                 params.listen_interval =
4372                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4373         else
4374                 params.listen_interval = -1;
4375
4376         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4377                 u8 tmp;
4378
4379                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4380                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4381                         return -EINVAL;
4382
4383                 params.support_p2p_ps = tmp;
4384         } else {
4385                 params.support_p2p_ps = -1;
4386         }
4387
4388         if (!info->attrs[NL80211_ATTR_MAC])
4389                 return -EINVAL;
4390
4391         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4392
4393         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4394                 params.supported_rates =
4395                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4396                 params.supported_rates_len =
4397                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4398         }
4399
4400         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4401                 params.capability =
4402                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4403                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4404         }
4405
4406         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4407                 params.ext_capab =
4408                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4409                 params.ext_capab_len =
4410                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4411         }
4412
4413         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4414                 return -EINVAL;
4415
4416         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4417                 params.plink_action =
4418                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4419                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4420                         return -EINVAL;
4421         }
4422
4423         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4424                 params.plink_state =
4425                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4426                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4427                         return -EINVAL;
4428                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4429                         params.peer_aid = nla_get_u16(
4430                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4431                         if (params.peer_aid > IEEE80211_MAX_AID)
4432                                 return -EINVAL;
4433                 }
4434                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4435         }
4436
4437         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4438                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4439                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4440
4441                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4442                     pm > NL80211_MESH_POWER_MAX)
4443                         return -EINVAL;
4444
4445                 params.local_pm = pm;
4446         }
4447
4448         /* Include parameters for TDLS peer (will check later) */
4449         err = nl80211_set_station_tdls(info, &params);
4450         if (err)
4451                 return err;
4452
4453         params.vlan = get_vlan(info, rdev);
4454         if (IS_ERR(params.vlan))
4455                 return PTR_ERR(params.vlan);
4456
4457         switch (dev->ieee80211_ptr->iftype) {
4458         case NL80211_IFTYPE_AP:
4459         case NL80211_IFTYPE_AP_VLAN:
4460         case NL80211_IFTYPE_P2P_GO:
4461         case NL80211_IFTYPE_P2P_CLIENT:
4462         case NL80211_IFTYPE_STATION:
4463         case NL80211_IFTYPE_ADHOC:
4464         case NL80211_IFTYPE_MESH_POINT:
4465                 break;
4466         default:
4467                 err = -EOPNOTSUPP;
4468                 goto out_put_vlan;
4469         }
4470
4471         /* driver will call cfg80211_check_station_change() */
4472         err = rdev_change_station(rdev, dev, mac_addr, &params);
4473
4474  out_put_vlan:
4475         if (params.vlan)
4476                 dev_put(params.vlan);
4477
4478         return err;
4479 }
4480
4481 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4482 {
4483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4484         int err;
4485         struct net_device *dev = info->user_ptr[1];
4486         struct station_parameters params;
4487         u8 *mac_addr = NULL;
4488         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4489                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4490
4491         memset(&params, 0, sizeof(params));
4492
4493         if (!rdev->ops->add_station)
4494                 return -EOPNOTSUPP;
4495
4496         if (!info->attrs[NL80211_ATTR_MAC])
4497                 return -EINVAL;
4498
4499         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4500                 return -EINVAL;
4501
4502         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4503                 return -EINVAL;
4504
4505         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4506             !info->attrs[NL80211_ATTR_PEER_AID])
4507                 return -EINVAL;
4508
4509         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4510         params.supported_rates =
4511                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4512         params.supported_rates_len =
4513                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4514         params.listen_interval =
4515                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4516
4517         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4518                 u8 tmp;
4519
4520                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4521                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4522                         return -EINVAL;
4523
4524                 params.support_p2p_ps = tmp;
4525         } else {
4526                 /*
4527                  * if not specified, assume it's supported for P2P GO interface,
4528                  * and is NOT supported for AP interface
4529                  */
4530                 params.support_p2p_ps =
4531                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4532         }
4533
4534         if (info->attrs[NL80211_ATTR_PEER_AID])
4535                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4536         else
4537                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4538         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4539                 return -EINVAL;
4540
4541         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4542                 params.capability =
4543                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4544                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4545         }
4546
4547         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4548                 params.ext_capab =
4549                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4550                 params.ext_capab_len =
4551                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4552         }
4553
4554         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4555                 params.ht_capa =
4556                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4557
4558         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4559                 params.vht_capa =
4560                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4561
4562         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4563                 params.opmode_notif_used = true;
4564                 params.opmode_notif =
4565                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4566         }
4567
4568         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4569                 params.plink_action =
4570                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4571                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4572                         return -EINVAL;
4573         }
4574
4575         err = nl80211_parse_sta_channel_info(info, &params);
4576         if (err)
4577                 return err;
4578
4579         err = nl80211_parse_sta_wme(info, &params);
4580         if (err)
4581                 return err;
4582
4583         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4584                 return -EINVAL;
4585
4586         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4587          * as userspace might just pass through the capabilities from the IEs
4588          * directly, rather than enforcing this restriction and returning an
4589          * error in this case.
4590          */
4591         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4592                 params.ht_capa = NULL;
4593                 params.vht_capa = NULL;
4594         }
4595
4596         /* When you run into this, adjust the code below for the new flag */
4597         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4598
4599         switch (dev->ieee80211_ptr->iftype) {
4600         case NL80211_IFTYPE_AP:
4601         case NL80211_IFTYPE_AP_VLAN:
4602         case NL80211_IFTYPE_P2P_GO:
4603                 /* ignore WME attributes if iface/sta is not capable */
4604                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4605                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4606                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4607
4608                 /* TDLS peers cannot be added */
4609                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4610                     info->attrs[NL80211_ATTR_PEER_AID])
4611                         return -EINVAL;
4612                 /* but don't bother the driver with it */
4613                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4614
4615                 /* allow authenticated/associated only if driver handles it */
4616                 if (!(rdev->wiphy.features &
4617                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4618                     params.sta_flags_mask & auth_assoc)
4619                         return -EINVAL;
4620
4621                 /* Older userspace, or userspace wanting to be compatible with
4622                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4623                  * and assoc flags in the mask, but assumes the station will be
4624                  * added as associated anyway since this was the required driver
4625                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4626                  * introduced.
4627                  * In order to not bother drivers with this quirk in the API
4628                  * set the flags in both the mask and set for new stations in
4629                  * this case.
4630                  */
4631                 if (!(params.sta_flags_mask & auth_assoc)) {
4632                         params.sta_flags_mask |= auth_assoc;
4633                         params.sta_flags_set |= auth_assoc;
4634                 }
4635
4636                 /* must be last in here for error handling */
4637                 params.vlan = get_vlan(info, rdev);
4638                 if (IS_ERR(params.vlan))
4639                         return PTR_ERR(params.vlan);
4640                 break;
4641         case NL80211_IFTYPE_MESH_POINT:
4642                 /* ignore uAPSD data */
4643                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4644
4645                 /* associated is disallowed */
4646                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4647                         return -EINVAL;
4648                 /* TDLS peers cannot be added */
4649                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4650                     info->attrs[NL80211_ATTR_PEER_AID])
4651                         return -EINVAL;
4652                 break;
4653         case NL80211_IFTYPE_STATION:
4654         case NL80211_IFTYPE_P2P_CLIENT:
4655                 /* ignore uAPSD data */
4656                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4657
4658                 /* these are disallowed */
4659                 if (params.sta_flags_mask &
4660                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4661                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4662                         return -EINVAL;
4663                 /* Only TDLS peers can be added */
4664                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4665                         return -EINVAL;
4666                 /* Can only add if TDLS ... */
4667                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4668                         return -EOPNOTSUPP;
4669                 /* ... with external setup is supported */
4670                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4671                         return -EOPNOTSUPP;
4672                 /*
4673                  * Older wpa_supplicant versions always mark the TDLS peer
4674                  * as authorized, but it shouldn't yet be.
4675                  */
4676                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4677                 break;
4678         default:
4679                 return -EOPNOTSUPP;
4680         }
4681
4682         /* be aware of params.vlan when changing code here */
4683
4684         err = rdev_add_station(rdev, dev, mac_addr, &params);
4685
4686         if (params.vlan)
4687                 dev_put(params.vlan);
4688         return err;
4689 }
4690
4691 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4692 {
4693         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4694         struct net_device *dev = info->user_ptr[1];
4695         struct station_del_parameters params;
4696
4697         memset(&params, 0, sizeof(params));
4698
4699         if (info->attrs[NL80211_ATTR_MAC])
4700                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4701
4702         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4703             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4704             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4705             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4706                 return -EINVAL;
4707
4708         if (!rdev->ops->del_station)
4709                 return -EOPNOTSUPP;
4710
4711         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4712                 params.subtype =
4713                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4714                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4715                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4716                         return -EINVAL;
4717         } else {
4718                 /* Default to Deauthentication frame */
4719                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4720         }
4721
4722         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4723                 params.reason_code =
4724                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4725                 if (params.reason_code == 0)
4726                         return -EINVAL; /* 0 is reserved */
4727         } else {
4728                 /* Default to reason code 2 */
4729                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4730         }
4731
4732         return rdev_del_station(rdev, dev, &params);
4733 }
4734
4735 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4736                                 int flags, struct net_device *dev,
4737                                 u8 *dst, u8 *next_hop,
4738                                 struct mpath_info *pinfo)
4739 {
4740         void *hdr;
4741         struct nlattr *pinfoattr;
4742
4743         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4744         if (!hdr)
4745                 return -1;
4746
4747         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4748             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4749             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4750             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4751                 goto nla_put_failure;
4752
4753         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4754         if (!pinfoattr)
4755                 goto nla_put_failure;
4756         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4757             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4758                         pinfo->frame_qlen))
4759                 goto nla_put_failure;
4760         if (((pinfo->filled & MPATH_INFO_SN) &&
4761              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4762             ((pinfo->filled & MPATH_INFO_METRIC) &&
4763              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4764                          pinfo->metric)) ||
4765             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4766              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4767                          pinfo->exptime)) ||
4768             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4769              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4770                         pinfo->flags)) ||
4771             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4772              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4773                          pinfo->discovery_timeout)) ||
4774             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4775              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4776                         pinfo->discovery_retries)))
4777                 goto nla_put_failure;
4778
4779         nla_nest_end(msg, pinfoattr);
4780
4781         genlmsg_end(msg, hdr);
4782         return 0;
4783
4784  nla_put_failure:
4785         genlmsg_cancel(msg, hdr);
4786         return -EMSGSIZE;
4787 }
4788
4789 static int nl80211_dump_mpath(struct sk_buff *skb,
4790                               struct netlink_callback *cb)
4791 {
4792         struct mpath_info pinfo;
4793         struct cfg80211_registered_device *rdev;
4794         struct wireless_dev *wdev;
4795         u8 dst[ETH_ALEN];
4796         u8 next_hop[ETH_ALEN];
4797         int path_idx = cb->args[2];
4798         int err;
4799
4800         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4801         if (err)
4802                 return err;
4803
4804         if (!rdev->ops->dump_mpath) {
4805                 err = -EOPNOTSUPP;
4806                 goto out_err;
4807         }
4808
4809         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4810                 err = -EOPNOTSUPP;
4811                 goto out_err;
4812         }
4813
4814         while (1) {
4815                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4816                                       next_hop, &pinfo);
4817                 if (err == -ENOENT)
4818                         break;
4819                 if (err)
4820                         goto out_err;
4821
4822                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4823                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4824                                        wdev->netdev, dst, next_hop,
4825                                        &pinfo) < 0)
4826                         goto out;
4827
4828                 path_idx++;
4829         }
4830
4831  out:
4832         cb->args[2] = path_idx;
4833         err = skb->len;
4834  out_err:
4835         nl80211_finish_wdev_dump(rdev);
4836         return err;
4837 }
4838
4839 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4840 {
4841         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4842         int err;
4843         struct net_device *dev = info->user_ptr[1];
4844         struct mpath_info pinfo;
4845         struct sk_buff *msg;
4846         u8 *dst = NULL;
4847         u8 next_hop[ETH_ALEN];
4848
4849         memset(&pinfo, 0, sizeof(pinfo));
4850
4851         if (!info->attrs[NL80211_ATTR_MAC])
4852                 return -EINVAL;
4853
4854         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4855
4856         if (!rdev->ops->get_mpath)
4857                 return -EOPNOTSUPP;
4858
4859         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4860                 return -EOPNOTSUPP;
4861
4862         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4863         if (err)
4864                 return err;
4865
4866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4867         if (!msg)
4868                 return -ENOMEM;
4869
4870         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4871                                  dev, dst, next_hop, &pinfo) < 0) {
4872                 nlmsg_free(msg);
4873                 return -ENOBUFS;
4874         }
4875
4876         return genlmsg_reply(msg, info);
4877 }
4878
4879 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4880 {
4881         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4882         struct net_device *dev = info->user_ptr[1];
4883         u8 *dst = NULL;
4884         u8 *next_hop = NULL;
4885
4886         if (!info->attrs[NL80211_ATTR_MAC])
4887                 return -EINVAL;
4888
4889         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4890                 return -EINVAL;
4891
4892         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4893         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4894
4895         if (!rdev->ops->change_mpath)
4896                 return -EOPNOTSUPP;
4897
4898         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4899                 return -EOPNOTSUPP;
4900
4901         return rdev_change_mpath(rdev, dev, dst, next_hop);
4902 }
4903
4904 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4905 {
4906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4907         struct net_device *dev = info->user_ptr[1];
4908         u8 *dst = NULL;
4909         u8 *next_hop = NULL;
4910
4911         if (!info->attrs[NL80211_ATTR_MAC])
4912                 return -EINVAL;
4913
4914         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4915                 return -EINVAL;
4916
4917         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4918         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4919
4920         if (!rdev->ops->add_mpath)
4921                 return -EOPNOTSUPP;
4922
4923         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4924                 return -EOPNOTSUPP;
4925
4926         return rdev_add_mpath(rdev, dev, dst, next_hop);
4927 }
4928
4929 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4930 {
4931         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4932         struct net_device *dev = info->user_ptr[1];
4933         u8 *dst = NULL;
4934
4935         if (info->attrs[NL80211_ATTR_MAC])
4936                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4937
4938         if (!rdev->ops->del_mpath)
4939                 return -EOPNOTSUPP;
4940
4941         return rdev_del_mpath(rdev, dev, dst);
4942 }
4943
4944 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4945 {
4946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4947         int err;
4948         struct net_device *dev = info->user_ptr[1];
4949         struct mpath_info pinfo;
4950         struct sk_buff *msg;
4951         u8 *dst = NULL;
4952         u8 mpp[ETH_ALEN];
4953
4954         memset(&pinfo, 0, sizeof(pinfo));
4955
4956         if (!info->attrs[NL80211_ATTR_MAC])
4957                 return -EINVAL;
4958
4959         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4960
4961         if (!rdev->ops->get_mpp)
4962                 return -EOPNOTSUPP;
4963
4964         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4965                 return -EOPNOTSUPP;
4966
4967         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4968         if (err)
4969                 return err;
4970
4971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4972         if (!msg)
4973                 return -ENOMEM;
4974
4975         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4976                                dev, dst, mpp, &pinfo) < 0) {
4977                 nlmsg_free(msg);
4978                 return -ENOBUFS;
4979         }
4980
4981         return genlmsg_reply(msg, info);
4982 }
4983
4984 static int nl80211_dump_mpp(struct sk_buff *skb,
4985                             struct netlink_callback *cb)
4986 {
4987         struct mpath_info pinfo;
4988         struct cfg80211_registered_device *rdev;
4989         struct wireless_dev *wdev;
4990         u8 dst[ETH_ALEN];
4991         u8 mpp[ETH_ALEN];
4992         int path_idx = cb->args[2];
4993         int err;
4994
4995         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4996         if (err)
4997                 return err;
4998
4999         if (!rdev->ops->dump_mpp) {
5000                 err = -EOPNOTSUPP;
5001                 goto out_err;
5002         }
5003
5004         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5005                 err = -EOPNOTSUPP;
5006                 goto out_err;
5007         }
5008
5009         while (1) {
5010                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5011                                     mpp, &pinfo);
5012                 if (err == -ENOENT)
5013                         break;
5014                 if (err)
5015                         goto out_err;
5016
5017                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5018                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5019                                        wdev->netdev, dst, mpp,
5020                                        &pinfo) < 0)
5021                         goto out;
5022
5023                 path_idx++;
5024         }
5025
5026  out:
5027         cb->args[2] = path_idx;
5028         err = skb->len;
5029  out_err:
5030         nl80211_finish_wdev_dump(rdev);
5031         return err;
5032 }
5033
5034 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5035 {
5036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5037         struct net_device *dev = info->user_ptr[1];
5038         struct wireless_dev *wdev = dev->ieee80211_ptr;
5039         struct bss_parameters params;
5040         int err;
5041
5042         memset(&params, 0, sizeof(params));
5043         /* default to not changing parameters */
5044         params.use_cts_prot = -1;
5045         params.use_short_preamble = -1;
5046         params.use_short_slot_time = -1;
5047         params.ap_isolate = -1;
5048         params.ht_opmode = -1;
5049         params.p2p_ctwindow = -1;
5050         params.p2p_opp_ps = -1;
5051
5052         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5053                 params.use_cts_prot =
5054                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5055         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5056                 params.use_short_preamble =
5057                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5058         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5059                 params.use_short_slot_time =
5060                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5061         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5062                 params.basic_rates =
5063                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5064                 params.basic_rates_len =
5065                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5066         }
5067         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5068                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5069         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5070                 params.ht_opmode =
5071                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5072
5073         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5074                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5075                         return -EINVAL;
5076                 params.p2p_ctwindow =
5077                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5078                 if (params.p2p_ctwindow < 0)
5079                         return -EINVAL;
5080                 if (params.p2p_ctwindow != 0 &&
5081                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5082                         return -EINVAL;
5083         }
5084
5085         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5086                 u8 tmp;
5087
5088                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5089                         return -EINVAL;
5090                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5091                 if (tmp > 1)
5092                         return -EINVAL;
5093                 params.p2p_opp_ps = tmp;
5094                 if (params.p2p_opp_ps &&
5095                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5096                         return -EINVAL;
5097         }
5098
5099         if (!rdev->ops->change_bss)
5100                 return -EOPNOTSUPP;
5101
5102         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5103             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5104                 return -EOPNOTSUPP;
5105
5106         wdev_lock(wdev);
5107         err = rdev_change_bss(rdev, dev, &params);
5108         wdev_unlock(wdev);
5109
5110         return err;
5111 }
5112
5113 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5114 {
5115         char *data = NULL;
5116         bool is_indoor;
5117         enum nl80211_user_reg_hint_type user_reg_hint_type;
5118         u32 owner_nlportid;
5119
5120         /*
5121          * You should only get this when cfg80211 hasn't yet initialized
5122          * completely when built-in to the kernel right between the time
5123          * window between nl80211_init() and regulatory_init(), if that is
5124          * even possible.
5125          */
5126         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5127                 return -EINPROGRESS;
5128
5129         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5130                 user_reg_hint_type =
5131                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5132         else
5133                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5134
5135         switch (user_reg_hint_type) {
5136         case NL80211_USER_REG_HINT_USER:
5137         case NL80211_USER_REG_HINT_CELL_BASE:
5138                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5139                         return -EINVAL;
5140
5141                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5142                 return regulatory_hint_user(data, user_reg_hint_type);
5143         case NL80211_USER_REG_HINT_INDOOR:
5144                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5145                         owner_nlportid = info->snd_portid;
5146                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5147                 } else {
5148                         owner_nlportid = 0;
5149                         is_indoor = true;
5150                 }
5151
5152                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5153         default:
5154                 return -EINVAL;
5155         }
5156 }
5157
5158 static int nl80211_get_mesh_config(struct sk_buff *skb,
5159                                    struct genl_info *info)
5160 {
5161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5162         struct net_device *dev = info->user_ptr[1];
5163         struct wireless_dev *wdev = dev->ieee80211_ptr;
5164         struct mesh_config cur_params;
5165         int err = 0;
5166         void *hdr;
5167         struct nlattr *pinfoattr;
5168         struct sk_buff *msg;
5169
5170         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5171                 return -EOPNOTSUPP;
5172
5173         if (!rdev->ops->get_mesh_config)
5174                 return -EOPNOTSUPP;
5175
5176         wdev_lock(wdev);
5177         /* If not connected, get default parameters */
5178         if (!wdev->mesh_id_len)
5179                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5180         else
5181                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5182         wdev_unlock(wdev);
5183
5184         if (err)
5185                 return err;
5186
5187         /* Draw up a netlink message to send back */
5188         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5189         if (!msg)
5190                 return -ENOMEM;
5191         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5192                              NL80211_CMD_GET_MESH_CONFIG);
5193         if (!hdr)
5194                 goto out;
5195         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5196         if (!pinfoattr)
5197                 goto nla_put_failure;
5198         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5199             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5200                         cur_params.dot11MeshRetryTimeout) ||
5201             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5202                         cur_params.dot11MeshConfirmTimeout) ||
5203             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5204                         cur_params.dot11MeshHoldingTimeout) ||
5205             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5206                         cur_params.dot11MeshMaxPeerLinks) ||
5207             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5208                        cur_params.dot11MeshMaxRetries) ||
5209             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5210                        cur_params.dot11MeshTTL) ||
5211             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5212                        cur_params.element_ttl) ||
5213             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5214                        cur_params.auto_open_plinks) ||
5215             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5216                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5217             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5218                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5219             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5220                         cur_params.path_refresh_time) ||
5221             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5222                         cur_params.min_discovery_timeout) ||
5223             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5224                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5225             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5226                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5227             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5228                         cur_params.dot11MeshHWMPperrMinInterval) ||
5229             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5230                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5231             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5232                        cur_params.dot11MeshHWMPRootMode) ||
5233             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5234                         cur_params.dot11MeshHWMPRannInterval) ||
5235             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5236                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5237             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5238                        cur_params.dot11MeshForwarding) ||
5239             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5240                         cur_params.rssi_threshold) ||
5241             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5242                         cur_params.ht_opmode) ||
5243             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5244                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5245             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5246                         cur_params.dot11MeshHWMProotInterval) ||
5247             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5248                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5249             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5250                         cur_params.power_mode) ||
5251             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5252                         cur_params.dot11MeshAwakeWindowDuration) ||
5253             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5254                         cur_params.plink_timeout))
5255                 goto nla_put_failure;
5256         nla_nest_end(msg, pinfoattr);
5257         genlmsg_end(msg, hdr);
5258         return genlmsg_reply(msg, info);
5259
5260  nla_put_failure:
5261         genlmsg_cancel(msg, hdr);
5262  out:
5263         nlmsg_free(msg);
5264         return -ENOBUFS;
5265 }
5266
5267 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5268         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5269         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5270         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5271         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5272         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5273         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5274         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5275         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5276         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5277         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5278         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5279         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5280         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5281         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5282         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5283         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5284         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5285         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5286         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5287         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5288         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5289         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5290         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5291         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5292         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5293         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5294         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5295         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5296 };
5297
5298 static const struct nla_policy
5299         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5300         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5301         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5302         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5303         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5304         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5305         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5306         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5307                                     .len = IEEE80211_MAX_DATA_LEN },
5308         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5309 };
5310
5311 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5312 {
5313         u8 val = nla_get_u8(nla);
5314         if (val < min || val > max)
5315                 return -EINVAL;
5316         *out = val;
5317         return 0;
5318 }
5319
5320 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5321 {
5322         u8 val = nla_get_u8(nla);
5323         if (val < min || val > max)
5324                 return -EINVAL;
5325         *out = val;
5326         return 0;
5327 }
5328
5329 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5330 {
5331         u16 val = nla_get_u16(nla);
5332         if (val < min || val > max)
5333                 return -EINVAL;
5334         *out = val;
5335         return 0;
5336 }
5337
5338 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5339 {
5340         u32 val = nla_get_u32(nla);
5341         if (val < min || val > max)
5342                 return -EINVAL;
5343         *out = val;
5344         return 0;
5345 }
5346
5347 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5348 {
5349         s32 val = nla_get_s32(nla);
5350         if (val < min || val > max)
5351                 return -EINVAL;
5352         *out = val;
5353         return 0;
5354 }
5355
5356 static int nl80211_parse_mesh_config(struct genl_info *info,
5357                                      struct mesh_config *cfg,
5358                                      u32 *mask_out)
5359 {
5360         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5361         u32 mask = 0;
5362         u16 ht_opmode;
5363
5364 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5365 do {                                                                        \
5366         if (tb[attr]) {                                                     \
5367                 if (fn(tb[attr], min, max, &cfg->param))                    \
5368                         return -EINVAL;                                     \
5369                 mask |= (1 << (attr - 1));                                  \
5370         }                                                                   \
5371 } while (0)
5372
5373         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5374                 return -EINVAL;
5375         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5376                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5377                              nl80211_meshconf_params_policy))
5378                 return -EINVAL;
5379
5380         /* This makes sure that there aren't more than 32 mesh config
5381          * parameters (otherwise our bitfield scheme would not work.) */
5382         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5383
5384         /* Fill in the params struct */
5385         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5386                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5387                                   nl80211_check_u16);
5388         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5389                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5390                                   nl80211_check_u16);
5391         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5392                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5393                                   nl80211_check_u16);
5394         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5395                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5396                                   nl80211_check_u16);
5397         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5398                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5399                                   nl80211_check_u8);
5400         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5401                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5402         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5403                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5404                                   nl80211_check_u8);
5405         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5406                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5407                                   nl80211_check_bool);
5408         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5409                                   1, 255, mask,
5410                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5411                                   nl80211_check_u32);
5412         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5413                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5414                                   nl80211_check_u8);
5415         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5416                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5417                                   nl80211_check_u32);
5418         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5419                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5420                                   nl80211_check_u16);
5421         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5422                                   1, 65535, mask,
5423                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5424                                   nl80211_check_u32);
5425         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5426                                   1, 65535, mask,
5427                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5428                                   nl80211_check_u16);
5429         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5430                                   1, 65535, mask,
5431                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5432                                   nl80211_check_u16);
5433         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5434                                   dot11MeshHWMPnetDiameterTraversalTime,
5435                                   1, 65535, mask,
5436                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5437                                   nl80211_check_u16);
5438         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5439                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5440                                   nl80211_check_u8);
5441         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5442                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5443                                   nl80211_check_u16);
5444         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5445                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5446                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5447                                   nl80211_check_bool);
5448         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5449                                   mask, NL80211_MESHCONF_FORWARDING,
5450                                   nl80211_check_bool);
5451         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5452                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5453                                   nl80211_check_s32);
5454         /*
5455          * Check HT operation mode based on
5456          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5457          */
5458         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5459                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5460
5461                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5462                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5463                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5464                         return -EINVAL;
5465
5466                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5467                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5468                         return -EINVAL;
5469
5470                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5471                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5472                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5473                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5474                                 return -EINVAL;
5475                         break;
5476                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5477                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5478                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5479                                 return -EINVAL;
5480                         break;
5481                 }
5482                 cfg->ht_opmode = ht_opmode;
5483         }
5484         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5485                                   1, 65535, mask,
5486                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5487                                   nl80211_check_u32);
5488         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5489                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5490                                   nl80211_check_u16);
5491         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5492                                   dot11MeshHWMPconfirmationInterval,
5493                                   1, 65535, mask,
5494                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5495                                   nl80211_check_u16);
5496         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5497                                   NL80211_MESH_POWER_ACTIVE,
5498                                   NL80211_MESH_POWER_MAX,
5499                                   mask, NL80211_MESHCONF_POWER_MODE,
5500                                   nl80211_check_u32);
5501         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5502                                   0, 65535, mask,
5503                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5504         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5505                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5506                                   nl80211_check_u32);
5507         if (mask_out)
5508                 *mask_out = mask;
5509
5510         return 0;
5511
5512 #undef FILL_IN_MESH_PARAM_IF_SET
5513 }
5514
5515 static int nl80211_parse_mesh_setup(struct genl_info *info,
5516                                      struct mesh_setup *setup)
5517 {
5518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5519         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5520
5521         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5522                 return -EINVAL;
5523         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5524                              info->attrs[NL80211_ATTR_MESH_SETUP],
5525                              nl80211_mesh_setup_params_policy))
5526                 return -EINVAL;
5527
5528         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5529                 setup->sync_method =
5530                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5531                  IEEE80211_SYNC_METHOD_VENDOR :
5532                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5533
5534         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5535                 setup->path_sel_proto =
5536                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5537                  IEEE80211_PATH_PROTOCOL_VENDOR :
5538                  IEEE80211_PATH_PROTOCOL_HWMP;
5539
5540         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5541                 setup->path_metric =
5542                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5543                  IEEE80211_PATH_METRIC_VENDOR :
5544                  IEEE80211_PATH_METRIC_AIRTIME;
5545
5546         if (tb[NL80211_MESH_SETUP_IE]) {
5547                 struct nlattr *ieattr =
5548                         tb[NL80211_MESH_SETUP_IE];
5549                 if (!is_valid_ie_attr(ieattr))
5550                         return -EINVAL;
5551                 setup->ie = nla_data(ieattr);
5552                 setup->ie_len = nla_len(ieattr);
5553         }
5554         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5555             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5556                 return -EINVAL;
5557         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5558         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5559         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5560         if (setup->is_secure)
5561                 setup->user_mpm = true;
5562
5563         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5564                 if (!setup->user_mpm)
5565                         return -EINVAL;
5566                 setup->auth_id =
5567                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5568         }
5569
5570         return 0;
5571 }
5572
5573 static int nl80211_update_mesh_config(struct sk_buff *skb,
5574                                       struct genl_info *info)
5575 {
5576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5577         struct net_device *dev = info->user_ptr[1];
5578         struct wireless_dev *wdev = dev->ieee80211_ptr;
5579         struct mesh_config cfg;
5580         u32 mask;
5581         int err;
5582
5583         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5584                 return -EOPNOTSUPP;
5585
5586         if (!rdev->ops->update_mesh_config)
5587                 return -EOPNOTSUPP;
5588
5589         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5590         if (err)
5591                 return err;
5592
5593         wdev_lock(wdev);
5594         if (!wdev->mesh_id_len)
5595                 err = -ENOLINK;
5596
5597         if (!err)
5598                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5599
5600         wdev_unlock(wdev);
5601
5602         return err;
5603 }
5604
5605 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5606                               struct sk_buff *msg)
5607 {
5608         struct nlattr *nl_reg_rules;
5609         unsigned int i;
5610
5611         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5612             (regdom->dfs_region &&
5613              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5614                 goto nla_put_failure;
5615
5616         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5617         if (!nl_reg_rules)
5618                 goto nla_put_failure;
5619
5620         for (i = 0; i < regdom->n_reg_rules; i++) {
5621                 struct nlattr *nl_reg_rule;
5622                 const struct ieee80211_reg_rule *reg_rule;
5623                 const struct ieee80211_freq_range *freq_range;
5624                 const struct ieee80211_power_rule *power_rule;
5625                 unsigned int max_bandwidth_khz;
5626
5627                 reg_rule = &regdom->reg_rules[i];
5628                 freq_range = &reg_rule->freq_range;
5629                 power_rule = &reg_rule->power_rule;
5630
5631                 nl_reg_rule = nla_nest_start(msg, i);
5632                 if (!nl_reg_rule)
5633                         goto nla_put_failure;
5634
5635                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5636                 if (!max_bandwidth_khz)
5637                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5638                                                                   reg_rule);
5639
5640                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5641                                 reg_rule->flags) ||
5642                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5643                                 freq_range->start_freq_khz) ||
5644                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5645                                 freq_range->end_freq_khz) ||
5646                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5647                                 max_bandwidth_khz) ||
5648                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5649                                 power_rule->max_antenna_gain) ||
5650                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5651                                 power_rule->max_eirp) ||
5652                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5653                                 reg_rule->dfs_cac_ms))
5654                         goto nla_put_failure;
5655
5656                 nla_nest_end(msg, nl_reg_rule);
5657         }
5658
5659         nla_nest_end(msg, nl_reg_rules);
5660         return 0;
5661
5662 nla_put_failure:
5663         return -EMSGSIZE;
5664 }
5665
5666 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5667 {
5668         const struct ieee80211_regdomain *regdom = NULL;
5669         struct cfg80211_registered_device *rdev;
5670         struct wiphy *wiphy = NULL;
5671         struct sk_buff *msg;
5672         void *hdr;
5673
5674         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5675         if (!msg)
5676                 return -ENOBUFS;
5677
5678         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5679                              NL80211_CMD_GET_REG);
5680         if (!hdr)
5681                 goto put_failure;
5682
5683         if (info->attrs[NL80211_ATTR_WIPHY]) {
5684                 bool self_managed;
5685
5686                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5687                 if (IS_ERR(rdev)) {
5688                         nlmsg_free(msg);
5689                         return PTR_ERR(rdev);
5690                 }
5691
5692                 wiphy = &rdev->wiphy;
5693                 self_managed = wiphy->regulatory_flags &
5694                                REGULATORY_WIPHY_SELF_MANAGED;
5695                 regdom = get_wiphy_regdom(wiphy);
5696
5697                 /* a self-managed-reg device must have a private regdom */
5698                 if (WARN_ON(!regdom && self_managed)) {
5699                         nlmsg_free(msg);
5700                         return -EINVAL;
5701                 }
5702
5703                 if (regdom &&
5704                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5705                         goto nla_put_failure;
5706         }
5707
5708         if (!wiphy && reg_last_request_cell_base() &&
5709             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5710                         NL80211_USER_REG_HINT_CELL_BASE))
5711                 goto nla_put_failure;
5712
5713         rcu_read_lock();
5714
5715         if (!regdom)
5716                 regdom = rcu_dereference(cfg80211_regdomain);
5717
5718         if (nl80211_put_regdom(regdom, msg))
5719                 goto nla_put_failure_rcu;
5720
5721         rcu_read_unlock();
5722
5723         genlmsg_end(msg, hdr);
5724         return genlmsg_reply(msg, info);
5725
5726 nla_put_failure_rcu:
5727         rcu_read_unlock();
5728 nla_put_failure:
5729         genlmsg_cancel(msg, hdr);
5730 put_failure:
5731         nlmsg_free(msg);
5732         return -EMSGSIZE;
5733 }
5734
5735 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5736                                u32 seq, int flags, struct wiphy *wiphy,
5737                                const struct ieee80211_regdomain *regdom)
5738 {
5739         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5740                                    NL80211_CMD_GET_REG);
5741
5742         if (!hdr)
5743                 return -1;
5744
5745         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5746
5747         if (nl80211_put_regdom(regdom, msg))
5748                 goto nla_put_failure;
5749
5750         if (!wiphy && reg_last_request_cell_base() &&
5751             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5752                         NL80211_USER_REG_HINT_CELL_BASE))
5753                 goto nla_put_failure;
5754
5755         if (wiphy &&
5756             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5757                 goto nla_put_failure;
5758
5759         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5760             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5761                 goto nla_put_failure;
5762
5763         genlmsg_end(msg, hdr);
5764         return 0;
5765
5766 nla_put_failure:
5767         genlmsg_cancel(msg, hdr);
5768         return -EMSGSIZE;
5769 }
5770
5771 static int nl80211_get_reg_dump(struct sk_buff *skb,
5772                                 struct netlink_callback *cb)
5773 {
5774         const struct ieee80211_regdomain *regdom = NULL;
5775         struct cfg80211_registered_device *rdev;
5776         int err, reg_idx, start = cb->args[2];
5777
5778         rtnl_lock();
5779
5780         if (cfg80211_regdomain && start == 0) {
5781                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5782                                           NLM_F_MULTI, NULL,
5783                                           rtnl_dereference(cfg80211_regdomain));
5784                 if (err < 0)
5785                         goto out_err;
5786         }
5787
5788         /* the global regdom is idx 0 */
5789         reg_idx = 1;
5790         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5791                 regdom = get_wiphy_regdom(&rdev->wiphy);
5792                 if (!regdom)
5793                         continue;
5794
5795                 if (++reg_idx <= start)
5796                         continue;
5797
5798                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5799                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5800                 if (err < 0) {
5801                         reg_idx--;
5802                         break;
5803                 }
5804         }
5805
5806         cb->args[2] = reg_idx;
5807         err = skb->len;
5808 out_err:
5809         rtnl_unlock();
5810         return err;
5811 }
5812
5813 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5814 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5815         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5816         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5817         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5818         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5819         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5820         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5821         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5822 };
5823
5824 static int parse_reg_rule(struct nlattr *tb[],
5825         struct ieee80211_reg_rule *reg_rule)
5826 {
5827         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5828         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5829
5830         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5831                 return -EINVAL;
5832         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5833                 return -EINVAL;
5834         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5835                 return -EINVAL;
5836         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5837                 return -EINVAL;
5838         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5839                 return -EINVAL;
5840
5841         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5842
5843         freq_range->start_freq_khz =
5844                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5845         freq_range->end_freq_khz =
5846                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5847         freq_range->max_bandwidth_khz =
5848                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5849
5850         power_rule->max_eirp =
5851                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5852
5853         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5854                 power_rule->max_antenna_gain =
5855                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5856
5857         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5858                 reg_rule->dfs_cac_ms =
5859                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5860
5861         return 0;
5862 }
5863
5864 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5865 {
5866         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5867         struct nlattr *nl_reg_rule;
5868         char *alpha2;
5869         int rem_reg_rules, r;
5870         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5871         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5872         struct ieee80211_regdomain *rd;
5873
5874         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5875                 return -EINVAL;
5876
5877         if (!info->attrs[NL80211_ATTR_REG_RULES])
5878                 return -EINVAL;
5879
5880         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5881
5882         if (info->attrs[NL80211_ATTR_DFS_REGION])
5883                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5884
5885         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5886                             rem_reg_rules) {
5887                 num_rules++;
5888                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5889                         return -EINVAL;
5890         }
5891
5892         if (!reg_is_valid_request(alpha2))
5893                 return -EINVAL;
5894
5895         size_of_regd = sizeof(struct ieee80211_regdomain) +
5896                        num_rules * sizeof(struct ieee80211_reg_rule);
5897
5898         rd = kzalloc(size_of_regd, GFP_KERNEL);
5899         if (!rd)
5900                 return -ENOMEM;
5901
5902         rd->n_reg_rules = num_rules;
5903         rd->alpha2[0] = alpha2[0];
5904         rd->alpha2[1] = alpha2[1];
5905
5906         /*
5907          * Disable DFS master mode if the DFS region was
5908          * not supported or known on this kernel.
5909          */
5910         if (reg_supported_dfs_region(dfs_region))
5911                 rd->dfs_region = dfs_region;
5912
5913         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5914                             rem_reg_rules) {
5915                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5916                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5917                               reg_rule_policy);
5918                 if (r)
5919                         goto bad_reg;
5920                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5921                 if (r)
5922                         goto bad_reg;
5923
5924                 rule_idx++;
5925
5926                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5927                         r = -EINVAL;
5928                         goto bad_reg;
5929                 }
5930         }
5931
5932         /* set_regdom takes ownership of rd */
5933         return set_regdom(rd, REGD_SOURCE_CRDA);
5934  bad_reg:
5935         kfree(rd);
5936         return r;
5937 }
5938 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5939
5940 static int validate_scan_freqs(struct nlattr *freqs)
5941 {
5942         struct nlattr *attr1, *attr2;
5943         int n_channels = 0, tmp1, tmp2;
5944
5945         nla_for_each_nested(attr1, freqs, tmp1) {
5946                 n_channels++;
5947                 /*
5948                  * Some hardware has a limited channel list for
5949                  * scanning, and it is pretty much nonsensical
5950                  * to scan for a channel twice, so disallow that
5951                  * and don't require drivers to check that the
5952                  * channel list they get isn't longer than what
5953                  * they can scan, as long as they can scan all
5954                  * the channels they registered at once.
5955                  */
5956                 nla_for_each_nested(attr2, freqs, tmp2)
5957                         if (attr1 != attr2 &&
5958                             nla_get_u32(attr1) == nla_get_u32(attr2))
5959                                 return 0;
5960         }
5961
5962         return n_channels;
5963 }
5964
5965 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5966 {
5967         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5968 }
5969
5970 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5971                             struct cfg80211_bss_selection *bss_select)
5972 {
5973         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5974         struct nlattr *nest;
5975         int err;
5976         bool found = false;
5977         int i;
5978
5979         /* only process one nested attribute */
5980         nest = nla_data(nla);
5981         if (!nla_ok(nest, nla_len(nest)))
5982                 return -EINVAL;
5983
5984         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5985                         nla_len(nest), nl80211_bss_select_policy);
5986         if (err)
5987                 return err;
5988
5989         /* only one attribute may be given */
5990         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5991                 if (attr[i]) {
5992                         if (found)
5993                                 return -EINVAL;
5994                         found = true;
5995                 }
5996         }
5997
5998         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5999
6000         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6001                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6002
6003         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6004                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6005                 bss_select->param.band_pref =
6006                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6007                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6008                         return -EINVAL;
6009         }
6010
6011         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6012                 struct nl80211_bss_select_rssi_adjust *adj_param;
6013
6014                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6015                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6016                 bss_select->param.adjust.band = adj_param->band;
6017                 bss_select->param.adjust.delta = adj_param->delta;
6018                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6019                         return -EINVAL;
6020         }
6021
6022         /* user-space did not provide behaviour attribute */
6023         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6024                 return -EINVAL;
6025
6026         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6027                 return -EINVAL;
6028
6029         return 0;
6030 }
6031
6032 static int nl80211_parse_random_mac(struct nlattr **attrs,
6033                                     u8 *mac_addr, u8 *mac_addr_mask)
6034 {
6035         int i;
6036
6037         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6038                 eth_zero_addr(mac_addr);
6039                 eth_zero_addr(mac_addr_mask);
6040                 mac_addr[0] = 0x2;
6041                 mac_addr_mask[0] = 0x3;
6042
6043                 return 0;
6044         }
6045
6046         /* need both or none */
6047         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6048                 return -EINVAL;
6049
6050         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6051         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6052
6053         /* don't allow or configure an mcast address */
6054         if (!is_multicast_ether_addr(mac_addr_mask) ||
6055             is_multicast_ether_addr(mac_addr))
6056                 return -EINVAL;
6057
6058         /*
6059          * allow users to pass a MAC address that has bits set outside
6060          * of the mask, but don't bother drivers with having to deal
6061          * with such bits
6062          */
6063         for (i = 0; i < ETH_ALEN; i++)
6064                 mac_addr[i] &= mac_addr_mask[i];
6065
6066         return 0;
6067 }
6068
6069 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6070 {
6071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6072         struct wireless_dev *wdev = info->user_ptr[1];
6073         struct cfg80211_scan_request *request;
6074         struct nlattr *attr;
6075         struct wiphy *wiphy;
6076         int err, tmp, n_ssids = 0, n_channels, i;
6077         size_t ie_len;
6078
6079         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6080                 return -EINVAL;
6081
6082         wiphy = &rdev->wiphy;
6083
6084         if (!rdev->ops->scan)
6085                 return -EOPNOTSUPP;
6086
6087         if (rdev->scan_req || rdev->scan_msg) {
6088                 err = -EBUSY;
6089                 goto unlock;
6090         }
6091
6092         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6093                 n_channels = validate_scan_freqs(
6094                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6095                 if (!n_channels) {
6096                         err = -EINVAL;
6097                         goto unlock;
6098                 }
6099         } else {
6100                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6101         }
6102
6103         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6104                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6105                         n_ssids++;
6106
6107         if (n_ssids > wiphy->max_scan_ssids) {
6108                 err = -EINVAL;
6109                 goto unlock;
6110         }
6111
6112         if (info->attrs[NL80211_ATTR_IE])
6113                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6114         else
6115                 ie_len = 0;
6116
6117         if (ie_len > wiphy->max_scan_ie_len) {
6118                 err = -EINVAL;
6119                 goto unlock;
6120         }
6121
6122         request = kzalloc(sizeof(*request)
6123                         + sizeof(*request->ssids) * n_ssids
6124                         + sizeof(*request->channels) * n_channels
6125                         + ie_len, GFP_KERNEL);
6126         if (!request) {
6127                 err = -ENOMEM;
6128                 goto unlock;
6129         }
6130
6131         if (n_ssids)
6132                 request->ssids = (void *)&request->channels[n_channels];
6133         request->n_ssids = n_ssids;
6134         if (ie_len) {
6135                 if (n_ssids)
6136                         request->ie = (void *)(request->ssids + n_ssids);
6137                 else
6138                         request->ie = (void *)(request->channels + n_channels);
6139         }
6140
6141         i = 0;
6142         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6143                 /* user specified, bail out if channel not found */
6144                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6145                         struct ieee80211_channel *chan;
6146
6147                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6148
6149                         if (!chan) {
6150                                 err = -EINVAL;
6151                                 goto out_free;
6152                         }
6153
6154                         /* ignore disabled channels */
6155                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6156                                 continue;
6157
6158                         request->channels[i] = chan;
6159                         i++;
6160                 }
6161         } else {
6162                 enum nl80211_band band;
6163
6164                 /* all channels */
6165                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6166                         int j;
6167
6168                         if (!wiphy->bands[band])
6169                                 continue;
6170                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6171                                 struct ieee80211_channel *chan;
6172
6173                                 chan = &wiphy->bands[band]->channels[j];
6174
6175                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6176                                         continue;
6177
6178                                 request->channels[i] = chan;
6179                                 i++;
6180                         }
6181                 }
6182         }
6183
6184         if (!i) {
6185                 err = -EINVAL;
6186                 goto out_free;
6187         }
6188
6189         request->n_channels = i;
6190
6191         i = 0;
6192         if (n_ssids) {
6193                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6194                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6195                                 err = -EINVAL;
6196                                 goto out_free;
6197                         }
6198                         request->ssids[i].ssid_len = nla_len(attr);
6199                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6200                         i++;
6201                 }
6202         }
6203
6204         if (info->attrs[NL80211_ATTR_IE]) {
6205                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6206                 memcpy((void *)request->ie,
6207                        nla_data(info->attrs[NL80211_ATTR_IE]),
6208                        request->ie_len);
6209         }
6210
6211         for (i = 0; i < NUM_NL80211_BANDS; i++)
6212                 if (wiphy->bands[i])
6213                         request->rates[i] =
6214                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6215
6216         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6217                 nla_for_each_nested(attr,
6218                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6219                                     tmp) {
6220                         enum nl80211_band band = nla_type(attr);
6221
6222                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6223                                 err = -EINVAL;
6224                                 goto out_free;
6225                         }
6226
6227                         if (!wiphy->bands[band])
6228                                 continue;
6229
6230                         err = ieee80211_get_ratemask(wiphy->bands[band],
6231                                                      nla_data(attr),
6232                                                      nla_len(attr),
6233                                                      &request->rates[band]);
6234                         if (err)
6235                                 goto out_free;
6236                 }
6237         }
6238
6239         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6240                 if (!wiphy_ext_feature_isset(wiphy,
6241                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6242                         err = -EOPNOTSUPP;
6243                         goto out_free;
6244                 }
6245
6246                 request->duration =
6247                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6248                 request->duration_mandatory =
6249                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6250         }
6251
6252         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6253                 request->flags = nla_get_u32(
6254                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6255                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6256                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6257                         err = -EOPNOTSUPP;
6258                         goto out_free;
6259                 }
6260
6261                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6262                         if (!(wiphy->features &
6263                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6264                                 err = -EOPNOTSUPP;
6265                                 goto out_free;
6266                         }
6267
6268                         if (wdev->current_bss) {
6269                                 err = -EOPNOTSUPP;
6270                                 goto out_free;
6271                         }
6272
6273                         err = nl80211_parse_random_mac(info->attrs,
6274                                                        request->mac_addr,
6275                                                        request->mac_addr_mask);
6276                         if (err)
6277                                 goto out_free;
6278                 }
6279         }
6280
6281         request->no_cck =
6282                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6283
6284         if (info->attrs[NL80211_ATTR_MAC])
6285                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6286                        ETH_ALEN);
6287         else
6288                 eth_broadcast_addr(request->bssid);
6289
6290         request->wdev = wdev;
6291         request->wiphy = &rdev->wiphy;
6292         request->scan_start = jiffies;
6293
6294         rdev->scan_req = request;
6295         err = rdev_scan(rdev, request);
6296
6297         if (!err) {
6298                 nl80211_send_scan_start(rdev, wdev);
6299                 if (wdev->netdev)
6300                         dev_hold(wdev->netdev);
6301         } else {
6302  out_free:
6303                 rdev->scan_req = NULL;
6304                 kfree(request);
6305         }
6306
6307  unlock:
6308         return err;
6309 }
6310
6311 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6312 {
6313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6314         struct wireless_dev *wdev = info->user_ptr[1];
6315
6316         if (!rdev->ops->abort_scan)
6317                 return -EOPNOTSUPP;
6318
6319         if (rdev->scan_msg)
6320                 return 0;
6321
6322         if (!rdev->scan_req)
6323                 return -ENOENT;
6324
6325         rdev_abort_scan(rdev, wdev);
6326         return 0;
6327 }
6328
6329 static int
6330 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6331                                struct cfg80211_sched_scan_request *request,
6332                                struct nlattr **attrs)
6333 {
6334         int tmp, err, i = 0;
6335         struct nlattr *attr;
6336
6337         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6338                 u32 interval;
6339
6340                 /*
6341                  * If scan plans are not specified,
6342                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6343                  * case one scan plan will be set with the specified scan
6344                  * interval and infinite number of iterations.
6345                  */
6346                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6347                         return -EINVAL;
6348
6349                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6350                 if (!interval)
6351                         return -EINVAL;
6352
6353                 request->scan_plans[0].interval =
6354                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6355                 if (!request->scan_plans[0].interval)
6356                         return -EINVAL;
6357
6358                 if (request->scan_plans[0].interval >
6359                     wiphy->max_sched_scan_plan_interval)
6360                         request->scan_plans[0].interval =
6361                                 wiphy->max_sched_scan_plan_interval;
6362
6363                 return 0;
6364         }
6365
6366         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6367                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6368
6369                 if (WARN_ON(i >= n_plans))
6370                         return -EINVAL;
6371
6372                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6373                                 nla_data(attr), nla_len(attr),
6374                                 nl80211_plan_policy);
6375                 if (err)
6376                         return err;
6377
6378                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6379                         return -EINVAL;
6380
6381                 request->scan_plans[i].interval =
6382                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6383                 if (!request->scan_plans[i].interval ||
6384                     request->scan_plans[i].interval >
6385                     wiphy->max_sched_scan_plan_interval)
6386                         return -EINVAL;
6387
6388                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6389                         request->scan_plans[i].iterations =
6390                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6391                         if (!request->scan_plans[i].iterations ||
6392                             (request->scan_plans[i].iterations >
6393                              wiphy->max_sched_scan_plan_iterations))
6394                                 return -EINVAL;
6395                 } else if (i < n_plans - 1) {
6396                         /*
6397                          * All scan plans but the last one must specify
6398                          * a finite number of iterations
6399                          */
6400                         return -EINVAL;
6401                 }
6402
6403                 i++;
6404         }
6405
6406         /*
6407          * The last scan plan must not specify the number of
6408          * iterations, it is supposed to run infinitely
6409          */
6410         if (request->scan_plans[n_plans - 1].iterations)
6411                 return  -EINVAL;
6412
6413         return 0;
6414 }
6415
6416 static struct cfg80211_sched_scan_request *
6417 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6418                          struct nlattr **attrs)
6419 {
6420         struct cfg80211_sched_scan_request *request;
6421         struct nlattr *attr;
6422         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6423         enum nl80211_band band;
6424         size_t ie_len;
6425         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6426         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6427
6428         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6429                 return ERR_PTR(-EINVAL);
6430
6431         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6432                 n_channels = validate_scan_freqs(
6433                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6434                 if (!n_channels)
6435                         return ERR_PTR(-EINVAL);
6436         } else {
6437                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6438         }
6439
6440         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6441                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6442                                     tmp)
6443                         n_ssids++;
6444
6445         if (n_ssids > wiphy->max_sched_scan_ssids)
6446                 return ERR_PTR(-EINVAL);
6447
6448         /*
6449          * First, count the number of 'real' matchsets. Due to an issue with
6450          * the old implementation, matchsets containing only the RSSI attribute
6451          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6452          * RSSI for all matchsets, rather than their own matchset for reporting
6453          * all APs with a strong RSSI. This is needed to be compatible with
6454          * older userspace that treated a matchset with only the RSSI as the
6455          * global RSSI for all other matchsets - if there are other matchsets.
6456          */
6457         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6458                 nla_for_each_nested(attr,
6459                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6460                                     tmp) {
6461                         struct nlattr *rssi;
6462
6463                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6464                                         nla_data(attr), nla_len(attr),
6465                                         nl80211_match_policy);
6466                         if (err)
6467                                 return ERR_PTR(err);
6468                         /* add other standalone attributes here */
6469                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6470                                 n_match_sets++;
6471                                 continue;
6472                         }
6473                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6474                         if (rssi)
6475                                 default_match_rssi = nla_get_s32(rssi);
6476                 }
6477         }
6478
6479         /* However, if there's no other matchset, add the RSSI one */
6480         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6481                 n_match_sets = 1;
6482
6483         if (n_match_sets > wiphy->max_match_sets)
6484                 return ERR_PTR(-EINVAL);
6485
6486         if (attrs[NL80211_ATTR_IE])
6487                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6488         else
6489                 ie_len = 0;
6490
6491         if (ie_len > wiphy->max_sched_scan_ie_len)
6492                 return ERR_PTR(-EINVAL);
6493
6494         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6495                 /*
6496                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6497                  * each scan plan already specifies its own interval
6498                  */
6499                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6500                         return ERR_PTR(-EINVAL);
6501
6502                 nla_for_each_nested(attr,
6503                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6504                         n_plans++;
6505         } else {
6506                 /*
6507                  * The scan interval attribute is kept for backward
6508                  * compatibility. If no scan plans are specified and sched scan
6509                  * interval is specified, one scan plan will be set with this
6510                  * scan interval and infinite number of iterations.
6511                  */
6512                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6513                         return ERR_PTR(-EINVAL);
6514
6515                 n_plans = 1;
6516         }
6517
6518         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6519                 return ERR_PTR(-EINVAL);
6520
6521         request = kzalloc(sizeof(*request)
6522                         + sizeof(*request->ssids) * n_ssids
6523                         + sizeof(*request->match_sets) * n_match_sets
6524                         + sizeof(*request->scan_plans) * n_plans
6525                         + sizeof(*request->channels) * n_channels
6526                         + ie_len, GFP_KERNEL);
6527         if (!request)
6528                 return ERR_PTR(-ENOMEM);
6529
6530         if (n_ssids)
6531                 request->ssids = (void *)&request->channels[n_channels];
6532         request->n_ssids = n_ssids;
6533         if (ie_len) {
6534                 if (n_ssids)
6535                         request->ie = (void *)(request->ssids + n_ssids);
6536                 else
6537                         request->ie = (void *)(request->channels + n_channels);
6538         }
6539
6540         if (n_match_sets) {
6541                 if (request->ie)
6542                         request->match_sets = (void *)(request->ie + ie_len);
6543                 else if (n_ssids)
6544                         request->match_sets =
6545                                 (void *)(request->ssids + n_ssids);
6546                 else
6547                         request->match_sets =
6548                                 (void *)(request->channels + n_channels);
6549         }
6550         request->n_match_sets = n_match_sets;
6551
6552         if (n_match_sets)
6553                 request->scan_plans = (void *)(request->match_sets +
6554                                                n_match_sets);
6555         else if (request->ie)
6556                 request->scan_plans = (void *)(request->ie + ie_len);
6557         else if (n_ssids)
6558                 request->scan_plans = (void *)(request->ssids + n_ssids);
6559         else
6560                 request->scan_plans = (void *)(request->channels + n_channels);
6561
6562         request->n_scan_plans = n_plans;
6563
6564         i = 0;
6565         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6566                 /* user specified, bail out if channel not found */
6567                 nla_for_each_nested(attr,
6568                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6569                                     tmp) {
6570                         struct ieee80211_channel *chan;
6571
6572                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6573
6574                         if (!chan) {
6575                                 err = -EINVAL;
6576                                 goto out_free;
6577                         }
6578
6579                         /* ignore disabled channels */
6580                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6581                                 continue;
6582
6583                         request->channels[i] = chan;
6584                         i++;
6585                 }
6586         } else {
6587                 /* all channels */
6588                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6589                         int j;
6590
6591                         if (!wiphy->bands[band])
6592                                 continue;
6593                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6594                                 struct ieee80211_channel *chan;
6595
6596                                 chan = &wiphy->bands[band]->channels[j];
6597
6598                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6599                                         continue;
6600
6601                                 request->channels[i] = chan;
6602                                 i++;
6603                         }
6604                 }
6605         }
6606
6607         if (!i) {
6608                 err = -EINVAL;
6609                 goto out_free;
6610         }
6611
6612         request->n_channels = i;
6613
6614         i = 0;
6615         if (n_ssids) {
6616                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6617                                     tmp) {
6618                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6619                                 err = -EINVAL;
6620                                 goto out_free;
6621                         }
6622                         request->ssids[i].ssid_len = nla_len(attr);
6623                         memcpy(request->ssids[i].ssid, nla_data(attr),
6624                                nla_len(attr));
6625                         i++;
6626                 }
6627         }
6628
6629         i = 0;
6630         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6631                 nla_for_each_nested(attr,
6632                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6633                                     tmp) {
6634                         struct nlattr *ssid, *rssi;
6635
6636                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6637                                         nla_data(attr), nla_len(attr),
6638                                         nl80211_match_policy);
6639                         if (err)
6640                                 goto out_free;
6641                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6642                         if (ssid) {
6643                                 if (WARN_ON(i >= n_match_sets)) {
6644                                         /* this indicates a programming error,
6645                                          * the loop above should have verified
6646                                          * things properly
6647                                          */
6648                                         err = -EINVAL;
6649                                         goto out_free;
6650                                 }
6651
6652                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6653                                         err = -EINVAL;
6654                                         goto out_free;
6655                                 }
6656                                 memcpy(request->match_sets[i].ssid.ssid,
6657                                        nla_data(ssid), nla_len(ssid));
6658                                 request->match_sets[i].ssid.ssid_len =
6659                                         nla_len(ssid);
6660                                 /* special attribute - old implementation w/a */
6661                                 request->match_sets[i].rssi_thold =
6662                                         default_match_rssi;
6663                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6664                                 if (rssi)
6665                                         request->match_sets[i].rssi_thold =
6666                                                 nla_get_s32(rssi);
6667                         }
6668                         i++;
6669                 }
6670
6671                 /* there was no other matchset, so the RSSI one is alone */
6672                 if (i == 0 && n_match_sets)
6673                         request->match_sets[0].rssi_thold = default_match_rssi;
6674
6675                 request->min_rssi_thold = INT_MAX;
6676                 for (i = 0; i < n_match_sets; i++)
6677                         request->min_rssi_thold =
6678                                 min(request->match_sets[i].rssi_thold,
6679                                     request->min_rssi_thold);
6680         } else {
6681                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6682         }
6683
6684         if (ie_len) {
6685                 request->ie_len = ie_len;
6686                 memcpy((void *)request->ie,
6687                        nla_data(attrs[NL80211_ATTR_IE]),
6688                        request->ie_len);
6689         }
6690
6691         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6692                 request->flags = nla_get_u32(
6693                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6694                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6695                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6696                         err = -EOPNOTSUPP;
6697                         goto out_free;
6698                 }
6699
6700                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6701                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6702
6703                         if (!wdev) /* must be net-detect */
6704                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6705
6706                         if (!(wiphy->features & flg)) {
6707                                 err = -EOPNOTSUPP;
6708                                 goto out_free;
6709                         }
6710
6711                         if (wdev && wdev->current_bss) {
6712                                 err = -EOPNOTSUPP;
6713                                 goto out_free;
6714                         }
6715
6716                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6717                                                        request->mac_addr_mask);
6718                         if (err)
6719                                 goto out_free;
6720                 }
6721         }
6722
6723         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6724                 request->delay =
6725                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6726
6727         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6728         if (err)
6729                 goto out_free;
6730
6731         request->scan_start = jiffies;
6732
6733         return request;
6734
6735 out_free:
6736         kfree(request);
6737         return ERR_PTR(err);
6738 }
6739
6740 static int nl80211_start_sched_scan(struct sk_buff *skb,
6741                                     struct genl_info *info)
6742 {
6743         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6744         struct net_device *dev = info->user_ptr[1];
6745         struct wireless_dev *wdev = dev->ieee80211_ptr;
6746         struct cfg80211_sched_scan_request *sched_scan_req;
6747         int err;
6748
6749         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6750             !rdev->ops->sched_scan_start)
6751                 return -EOPNOTSUPP;
6752
6753         if (rdev->sched_scan_req)
6754                 return -EINPROGRESS;
6755
6756         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6757                                                   info->attrs);
6758
6759         err = PTR_ERR_OR_ZERO(sched_scan_req);
6760         if (err)
6761                 goto out_err;
6762
6763         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6764         if (err)
6765                 goto out_free;
6766
6767         sched_scan_req->dev = dev;
6768         sched_scan_req->wiphy = &rdev->wiphy;
6769
6770         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6771                 sched_scan_req->owner_nlportid = info->snd_portid;
6772
6773         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6774
6775         nl80211_send_sched_scan(rdev, dev,
6776                                 NL80211_CMD_START_SCHED_SCAN);
6777         return 0;
6778
6779 out_free:
6780         kfree(sched_scan_req);
6781 out_err:
6782         return err;
6783 }
6784
6785 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6786                                    struct genl_info *info)
6787 {
6788         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6789
6790         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6791             !rdev->ops->sched_scan_stop)
6792                 return -EOPNOTSUPP;
6793
6794         return __cfg80211_stop_sched_scan(rdev, false);
6795 }
6796
6797 static int nl80211_start_radar_detection(struct sk_buff *skb,
6798                                          struct genl_info *info)
6799 {
6800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6801         struct net_device *dev = info->user_ptr[1];
6802         struct wireless_dev *wdev = dev->ieee80211_ptr;
6803         struct cfg80211_chan_def chandef;
6804         enum nl80211_dfs_regions dfs_region;
6805         unsigned int cac_time_ms;
6806         int err;
6807
6808         dfs_region = reg_get_dfs_region(wdev->wiphy);
6809         if (dfs_region == NL80211_DFS_UNSET)
6810                 return -EINVAL;
6811
6812         err = nl80211_parse_chandef(rdev, info, &chandef);
6813         if (err)
6814                 return err;
6815
6816         if (netif_carrier_ok(dev))
6817                 return -EBUSY;
6818
6819         if (wdev->cac_started)
6820                 return -EBUSY;
6821
6822         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6823                                             wdev->iftype);
6824         if (err < 0)
6825                 return err;
6826
6827         if (err == 0)
6828                 return -EINVAL;
6829
6830         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6831                 return -EINVAL;
6832
6833         if (!rdev->ops->start_radar_detection)
6834                 return -EOPNOTSUPP;
6835
6836         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6837         if (WARN_ON(!cac_time_ms))
6838                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6839
6840         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6841         if (!err) {
6842                 wdev->chandef = chandef;
6843                 wdev->cac_started = true;
6844                 wdev->cac_start_time = jiffies;
6845                 wdev->cac_time_ms = cac_time_ms;
6846         }
6847         return err;
6848 }
6849
6850 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6851 {
6852         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6853         struct net_device *dev = info->user_ptr[1];
6854         struct wireless_dev *wdev = dev->ieee80211_ptr;
6855         struct cfg80211_csa_settings params;
6856         /* csa_attrs is defined static to avoid waste of stack size - this
6857          * function is called under RTNL lock, so this should not be a problem.
6858          */
6859         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6860         int err;
6861         bool need_new_beacon = false;
6862         int len, i;
6863         u32 cs_count;
6864
6865         if (!rdev->ops->channel_switch ||
6866             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6867                 return -EOPNOTSUPP;
6868
6869         switch (dev->ieee80211_ptr->iftype) {
6870         case NL80211_IFTYPE_AP:
6871         case NL80211_IFTYPE_P2P_GO:
6872                 need_new_beacon = true;
6873
6874                 /* useless if AP is not running */
6875                 if (!wdev->beacon_interval)
6876                         return -ENOTCONN;
6877                 break;
6878         case NL80211_IFTYPE_ADHOC:
6879                 if (!wdev->ssid_len)
6880                         return -ENOTCONN;
6881                 break;
6882         case NL80211_IFTYPE_MESH_POINT:
6883                 if (!wdev->mesh_id_len)
6884                         return -ENOTCONN;
6885                 break;
6886         default:
6887                 return -EOPNOTSUPP;
6888         }
6889
6890         memset(&params, 0, sizeof(params));
6891
6892         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6893             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6894                 return -EINVAL;
6895
6896         /* only important for AP, IBSS and mesh create IEs internally */
6897         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6898                 return -EINVAL;
6899
6900         /* Even though the attribute is u32, the specification says
6901          * u8, so let's make sure we don't overflow.
6902          */
6903         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6904         if (cs_count > 255)
6905                 return -EINVAL;
6906
6907         params.count = cs_count;
6908
6909         if (!need_new_beacon)
6910                 goto skip_beacons;
6911
6912         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6913         if (err)
6914                 return err;
6915
6916         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6917                                info->attrs[NL80211_ATTR_CSA_IES],
6918                                nl80211_policy);
6919         if (err)
6920                 return err;
6921
6922         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6923         if (err)
6924                 return err;
6925
6926         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6927                 return -EINVAL;
6928
6929         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6930         if (!len || (len % sizeof(u16)))
6931                 return -EINVAL;
6932
6933         params.n_counter_offsets_beacon = len / sizeof(u16);
6934         if (rdev->wiphy.max_num_csa_counters &&
6935             (params.n_counter_offsets_beacon >
6936              rdev->wiphy.max_num_csa_counters))
6937                 return -EINVAL;
6938
6939         params.counter_offsets_beacon =
6940                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6941
6942         /* sanity checks - counters should fit and be the same */
6943         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6944                 u16 offset = params.counter_offsets_beacon[i];
6945
6946                 if (offset >= params.beacon_csa.tail_len)
6947                         return -EINVAL;
6948
6949                 if (params.beacon_csa.tail[offset] != params.count)
6950                         return -EINVAL;
6951         }
6952
6953         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6954                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6955                 if (!len || (len % sizeof(u16)))
6956                         return -EINVAL;
6957
6958                 params.n_counter_offsets_presp = len / sizeof(u16);
6959                 if (rdev->wiphy.max_num_csa_counters &&
6960                     (params.n_counter_offsets_beacon >
6961                      rdev->wiphy.max_num_csa_counters))
6962                         return -EINVAL;
6963
6964                 params.counter_offsets_presp =
6965                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6966
6967                 /* sanity checks - counters should fit and be the same */
6968                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6969                         u16 offset = params.counter_offsets_presp[i];
6970
6971                         if (offset >= params.beacon_csa.probe_resp_len)
6972                                 return -EINVAL;
6973
6974                         if (params.beacon_csa.probe_resp[offset] !=
6975                             params.count)
6976                                 return -EINVAL;
6977                 }
6978         }
6979
6980 skip_beacons:
6981         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6982         if (err)
6983                 return err;
6984
6985         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6986                                            wdev->iftype))
6987                 return -EINVAL;
6988
6989         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6990                                             &params.chandef,
6991                                             wdev->iftype);
6992         if (err < 0)
6993                 return err;
6994
6995         if (err > 0)
6996                 params.radar_required = true;
6997
6998         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6999                 params.block_tx = true;
7000
7001         wdev_lock(wdev);
7002         err = rdev_channel_switch(rdev, dev, &params);
7003         wdev_unlock(wdev);
7004
7005         return err;
7006 }
7007
7008 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7009                             u32 seq, int flags,
7010                             struct cfg80211_registered_device *rdev,
7011                             struct wireless_dev *wdev,
7012                             struct cfg80211_internal_bss *intbss)
7013 {
7014         struct cfg80211_bss *res = &intbss->pub;
7015         const struct cfg80211_bss_ies *ies;
7016         void *hdr;
7017         struct nlattr *bss;
7018
7019         ASSERT_WDEV_LOCK(wdev);
7020
7021         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7022                              NL80211_CMD_NEW_SCAN_RESULTS);
7023         if (!hdr)
7024                 return -1;
7025
7026         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7027
7028         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7029                 goto nla_put_failure;
7030         if (wdev->netdev &&
7031             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7032                 goto nla_put_failure;
7033         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7034                               NL80211_ATTR_PAD))
7035                 goto nla_put_failure;
7036
7037         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7038         if (!bss)
7039                 goto nla_put_failure;
7040         if ((!is_zero_ether_addr(res->bssid) &&
7041              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7042                 goto nla_put_failure;
7043
7044         rcu_read_lock();
7045         /* indicate whether we have probe response data or not */
7046         if (rcu_access_pointer(res->proberesp_ies) &&
7047             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7048                 goto fail_unlock_rcu;
7049
7050         /* this pointer prefers to be pointed to probe response data
7051          * but is always valid
7052          */
7053         ies = rcu_dereference(res->ies);
7054         if (ies) {
7055                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7056                                       NL80211_BSS_PAD))
7057                         goto fail_unlock_rcu;
7058                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7059                                         ies->len, ies->data))
7060                         goto fail_unlock_rcu;
7061         }
7062
7063         /* and this pointer is always (unless driver didn't know) beacon data */
7064         ies = rcu_dereference(res->beacon_ies);
7065         if (ies && ies->from_beacon) {
7066                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7067                                       NL80211_BSS_PAD))
7068                         goto fail_unlock_rcu;
7069                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7070                                         ies->len, ies->data))
7071                         goto fail_unlock_rcu;
7072         }
7073         rcu_read_unlock();
7074
7075         if (res->beacon_interval &&
7076             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7077                 goto nla_put_failure;
7078         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7079             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7080             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7081             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7082                         jiffies_to_msecs(jiffies - intbss->ts)))
7083                 goto nla_put_failure;
7084
7085         if (intbss->parent_tsf &&
7086             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7087                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7088              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7089                      intbss->parent_bssid)))
7090                 goto nla_put_failure;
7091
7092         if (intbss->ts_boottime &&
7093             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7094                               intbss->ts_boottime, NL80211_BSS_PAD))
7095                 goto nla_put_failure;
7096
7097         switch (rdev->wiphy.signal_type) {
7098         case CFG80211_SIGNAL_TYPE_MBM:
7099                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7100                         goto nla_put_failure;
7101                 break;
7102         case CFG80211_SIGNAL_TYPE_UNSPEC:
7103                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7104                         goto nla_put_failure;
7105                 break;
7106         default:
7107                 break;
7108         }
7109
7110         switch (wdev->iftype) {
7111         case NL80211_IFTYPE_P2P_CLIENT:
7112         case NL80211_IFTYPE_STATION:
7113                 if (intbss == wdev->current_bss &&
7114                     nla_put_u32(msg, NL80211_BSS_STATUS,
7115                                 NL80211_BSS_STATUS_ASSOCIATED))
7116                         goto nla_put_failure;
7117                 break;
7118         case NL80211_IFTYPE_ADHOC:
7119                 if (intbss == wdev->current_bss &&
7120                     nla_put_u32(msg, NL80211_BSS_STATUS,
7121                                 NL80211_BSS_STATUS_IBSS_JOINED))
7122                         goto nla_put_failure;
7123                 break;
7124         default:
7125                 break;
7126         }
7127
7128         nla_nest_end(msg, bss);
7129
7130         genlmsg_end(msg, hdr);
7131         return 0;
7132
7133  fail_unlock_rcu:
7134         rcu_read_unlock();
7135  nla_put_failure:
7136         genlmsg_cancel(msg, hdr);
7137         return -EMSGSIZE;
7138 }
7139
7140 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7141 {
7142         struct cfg80211_registered_device *rdev;
7143         struct cfg80211_internal_bss *scan;
7144         struct wireless_dev *wdev;
7145         int start = cb->args[2], idx = 0;
7146         int err;
7147
7148         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7149         if (err)
7150                 return err;
7151
7152         wdev_lock(wdev);
7153         spin_lock_bh(&rdev->bss_lock);
7154         cfg80211_bss_expire(rdev);
7155
7156         cb->seq = rdev->bss_generation;
7157
7158         list_for_each_entry(scan, &rdev->bss_list, list) {
7159                 if (++idx <= start)
7160                         continue;
7161                 if (nl80211_send_bss(skb, cb,
7162                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7163                                 rdev, wdev, scan) < 0) {
7164                         idx--;
7165                         break;
7166                 }
7167         }
7168
7169         spin_unlock_bh(&rdev->bss_lock);
7170         wdev_unlock(wdev);
7171
7172         cb->args[2] = idx;
7173         nl80211_finish_wdev_dump(rdev);
7174
7175         return skb->len;
7176 }
7177
7178 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7179                                int flags, struct net_device *dev,
7180                                bool allow_radio_stats,
7181                                struct survey_info *survey)
7182 {
7183         void *hdr;
7184         struct nlattr *infoattr;
7185
7186         /* skip radio stats if userspace didn't request them */
7187         if (!survey->channel && !allow_radio_stats)
7188                 return 0;
7189
7190         hdr = nl80211hdr_put(msg, portid, seq, flags,
7191                              NL80211_CMD_NEW_SURVEY_RESULTS);
7192         if (!hdr)
7193                 return -ENOMEM;
7194
7195         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7196                 goto nla_put_failure;
7197
7198         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7199         if (!infoattr)
7200                 goto nla_put_failure;
7201
7202         if (survey->channel &&
7203             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7204                         survey->channel->center_freq))
7205                 goto nla_put_failure;
7206
7207         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7208             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7209                 goto nla_put_failure;
7210         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7211             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7212                 goto nla_put_failure;
7213         if ((survey->filled & SURVEY_INFO_TIME) &&
7214             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7215                         survey->time, NL80211_SURVEY_INFO_PAD))
7216                 goto nla_put_failure;
7217         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7218             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7219                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7220                 goto nla_put_failure;
7221         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7222             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7223                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7224                 goto nla_put_failure;
7225         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7226             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7227                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7228                 goto nla_put_failure;
7229         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7230             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7231                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7232                 goto nla_put_failure;
7233         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7234             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7235                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7236                 goto nla_put_failure;
7237
7238         nla_nest_end(msg, infoattr);
7239
7240         genlmsg_end(msg, hdr);
7241         return 0;
7242
7243  nla_put_failure:
7244         genlmsg_cancel(msg, hdr);
7245         return -EMSGSIZE;
7246 }
7247
7248 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7249 {
7250         struct survey_info survey;
7251         struct cfg80211_registered_device *rdev;
7252         struct wireless_dev *wdev;
7253         int survey_idx = cb->args[2];
7254         int res;
7255         bool radio_stats;
7256
7257         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7258         if (res)
7259                 return res;
7260
7261         /* prepare_wdev_dump parsed the attributes */
7262         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7263
7264         if (!wdev->netdev) {
7265                 res = -EINVAL;
7266                 goto out_err;
7267         }
7268
7269         if (!rdev->ops->dump_survey) {
7270                 res = -EOPNOTSUPP;
7271                 goto out_err;
7272         }
7273
7274         while (1) {
7275                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7276                 if (res == -ENOENT)
7277                         break;
7278                 if (res)
7279                         goto out_err;
7280
7281                 /* don't send disabled channels, but do send non-channel data */
7282                 if (survey.channel &&
7283                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7284                         survey_idx++;
7285                         continue;
7286                 }
7287
7288                 if (nl80211_send_survey(skb,
7289                                 NETLINK_CB(cb->skb).portid,
7290                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7291                                 wdev->netdev, radio_stats, &survey) < 0)
7292                         goto out;
7293                 survey_idx++;
7294         }
7295
7296  out:
7297         cb->args[2] = survey_idx;
7298         res = skb->len;
7299  out_err:
7300         nl80211_finish_wdev_dump(rdev);
7301         return res;
7302 }
7303
7304 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7305 {
7306         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7307                                   NL80211_WPA_VERSION_2));
7308 }
7309
7310 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7311 {
7312         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7313         struct net_device *dev = info->user_ptr[1];
7314         struct ieee80211_channel *chan;
7315         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7316         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7317         enum nl80211_auth_type auth_type;
7318         struct key_parse key;
7319         bool local_state_change;
7320
7321         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7322                 return -EINVAL;
7323
7324         if (!info->attrs[NL80211_ATTR_MAC])
7325                 return -EINVAL;
7326
7327         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7328                 return -EINVAL;
7329
7330         if (!info->attrs[NL80211_ATTR_SSID])
7331                 return -EINVAL;
7332
7333         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7334                 return -EINVAL;
7335
7336         err = nl80211_parse_key(info, &key);
7337         if (err)
7338                 return err;
7339
7340         if (key.idx >= 0) {
7341                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7342                         return -EINVAL;
7343                 if (!key.p.key || !key.p.key_len)
7344                         return -EINVAL;
7345                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7346                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7347                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7348                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7349                         return -EINVAL;
7350                 if (key.idx > 4)
7351                         return -EINVAL;
7352         } else {
7353                 key.p.key_len = 0;
7354                 key.p.key = NULL;
7355         }
7356
7357         if (key.idx >= 0) {
7358                 int i;
7359                 bool ok = false;
7360
7361                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7362                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7363                                 ok = true;
7364                                 break;
7365                         }
7366                 }
7367                 if (!ok)
7368                         return -EINVAL;
7369         }
7370
7371         if (!rdev->ops->auth)
7372                 return -EOPNOTSUPP;
7373
7374         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7375             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7376                 return -EOPNOTSUPP;
7377
7378         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7379         chan = nl80211_get_valid_chan(&rdev->wiphy,
7380                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7381         if (!chan)
7382                 return -EINVAL;
7383
7384         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7385         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7386
7387         if (info->attrs[NL80211_ATTR_IE]) {
7388                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7389                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7390         }
7391
7392         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7393         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7394                 return -EINVAL;
7395
7396         if (auth_type == NL80211_AUTHTYPE_SAE &&
7397             !info->attrs[NL80211_ATTR_SAE_DATA])
7398                 return -EINVAL;
7399
7400         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7401                 if (auth_type != NL80211_AUTHTYPE_SAE)
7402                         return -EINVAL;
7403                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7404                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7405                 /* need to include at least Auth Transaction and Status Code */
7406                 if (sae_data_len < 4)
7407                         return -EINVAL;
7408         }
7409
7410         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7411
7412         /*
7413          * Since we no longer track auth state, ignore
7414          * requests to only change local state.
7415          */
7416         if (local_state_change)
7417                 return 0;
7418
7419         wdev_lock(dev->ieee80211_ptr);
7420         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7421                                  ssid, ssid_len, ie, ie_len,
7422                                  key.p.key, key.p.key_len, key.idx,
7423                                  sae_data, sae_data_len);
7424         wdev_unlock(dev->ieee80211_ptr);
7425         return err;
7426 }
7427
7428 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7429                                    struct genl_info *info,
7430                                    struct cfg80211_crypto_settings *settings,
7431                                    int cipher_limit)
7432 {
7433         memset(settings, 0, sizeof(*settings));
7434
7435         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7436
7437         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7438                 u16 proto;
7439
7440                 proto = nla_get_u16(
7441                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7442                 settings->control_port_ethertype = cpu_to_be16(proto);
7443                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7444                     proto != ETH_P_PAE)
7445                         return -EINVAL;
7446                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7447                         settings->control_port_no_encrypt = true;
7448         } else
7449                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7450
7451         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7452                 void *data;
7453                 int len, i;
7454
7455                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7456                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7457                 settings->n_ciphers_pairwise = len / sizeof(u32);
7458
7459                 if (len % sizeof(u32))
7460                         return -EINVAL;
7461
7462                 if (settings->n_ciphers_pairwise > cipher_limit)
7463                         return -EINVAL;
7464
7465                 memcpy(settings->ciphers_pairwise, data, len);
7466
7467                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7468                         if (!cfg80211_supported_cipher_suite(
7469                                         &rdev->wiphy,
7470                                         settings->ciphers_pairwise[i]))
7471                                 return -EINVAL;
7472         }
7473
7474         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7475                 settings->cipher_group =
7476                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7477                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7478                                                      settings->cipher_group))
7479                         return -EINVAL;
7480         }
7481
7482         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7483                 settings->wpa_versions =
7484                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7485                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7486                         return -EINVAL;
7487         }
7488
7489         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7490                 void *data;
7491                 int len;
7492
7493                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7494                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7495                 settings->n_akm_suites = len / sizeof(u32);
7496
7497                 if (len % sizeof(u32))
7498                         return -EINVAL;
7499
7500                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7501                         return -EINVAL;
7502
7503                 memcpy(settings->akm_suites, data, len);
7504         }
7505
7506         return 0;
7507 }
7508
7509 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7510 {
7511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7512         struct net_device *dev = info->user_ptr[1];
7513         struct ieee80211_channel *chan;
7514         struct cfg80211_assoc_request req = {};
7515         const u8 *bssid, *ssid;
7516         int err, ssid_len = 0;
7517
7518         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7519                 return -EINVAL;
7520
7521         if (!info->attrs[NL80211_ATTR_MAC] ||
7522             !info->attrs[NL80211_ATTR_SSID] ||
7523             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7524                 return -EINVAL;
7525
7526         if (!rdev->ops->assoc)
7527                 return -EOPNOTSUPP;
7528
7529         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7530             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7531                 return -EOPNOTSUPP;
7532
7533         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7534
7535         chan = nl80211_get_valid_chan(&rdev->wiphy,
7536                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7537         if (!chan)
7538                 return -EINVAL;
7539
7540         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7541         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7542
7543         if (info->attrs[NL80211_ATTR_IE]) {
7544                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7545                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7546         }
7547
7548         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7549                 enum nl80211_mfp mfp =
7550                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7551                 if (mfp == NL80211_MFP_REQUIRED)
7552                         req.use_mfp = true;
7553                 else if (mfp != NL80211_MFP_NO)
7554                         return -EINVAL;
7555         }
7556
7557         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7558                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7559
7560         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7561                 req.flags |= ASSOC_REQ_DISABLE_HT;
7562
7563         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7564                 memcpy(&req.ht_capa_mask,
7565                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7566                        sizeof(req.ht_capa_mask));
7567
7568         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7569                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7570                         return -EINVAL;
7571                 memcpy(&req.ht_capa,
7572                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7573                        sizeof(req.ht_capa));
7574         }
7575
7576         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7577                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7578
7579         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7580                 memcpy(&req.vht_capa_mask,
7581                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7582                        sizeof(req.vht_capa_mask));
7583
7584         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7585                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7586                         return -EINVAL;
7587                 memcpy(&req.vht_capa,
7588                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7589                        sizeof(req.vht_capa));
7590         }
7591
7592         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7593                 if (!((rdev->wiphy.features &
7594                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7595                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7596                     !wiphy_ext_feature_isset(&rdev->wiphy,
7597                                              NL80211_EXT_FEATURE_RRM))
7598                         return -EINVAL;
7599                 req.flags |= ASSOC_REQ_USE_RRM;
7600         }
7601
7602         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7603         if (!err) {
7604                 wdev_lock(dev->ieee80211_ptr);
7605                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7606                                           ssid, ssid_len, &req);
7607                 wdev_unlock(dev->ieee80211_ptr);
7608         }
7609
7610         return err;
7611 }
7612
7613 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7614 {
7615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7616         struct net_device *dev = info->user_ptr[1];
7617         const u8 *ie = NULL, *bssid;
7618         int ie_len = 0, err;
7619         u16 reason_code;
7620         bool local_state_change;
7621
7622         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7623                 return -EINVAL;
7624
7625         if (!info->attrs[NL80211_ATTR_MAC])
7626                 return -EINVAL;
7627
7628         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7629                 return -EINVAL;
7630
7631         if (!rdev->ops->deauth)
7632                 return -EOPNOTSUPP;
7633
7634         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7635             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7636                 return -EOPNOTSUPP;
7637
7638         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7639
7640         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7641         if (reason_code == 0) {
7642                 /* Reason Code 0 is reserved */
7643                 return -EINVAL;
7644         }
7645
7646         if (info->attrs[NL80211_ATTR_IE]) {
7647                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7648                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7649         }
7650
7651         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7652
7653         wdev_lock(dev->ieee80211_ptr);
7654         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7655                                    local_state_change);
7656         wdev_unlock(dev->ieee80211_ptr);
7657         return err;
7658 }
7659
7660 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7661 {
7662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7663         struct net_device *dev = info->user_ptr[1];
7664         const u8 *ie = NULL, *bssid;
7665         int ie_len = 0, err;
7666         u16 reason_code;
7667         bool local_state_change;
7668
7669         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7670                 return -EINVAL;
7671
7672         if (!info->attrs[NL80211_ATTR_MAC])
7673                 return -EINVAL;
7674
7675         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7676                 return -EINVAL;
7677
7678         if (!rdev->ops->disassoc)
7679                 return -EOPNOTSUPP;
7680
7681         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7682             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7683                 return -EOPNOTSUPP;
7684
7685         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7686
7687         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7688         if (reason_code == 0) {
7689                 /* Reason Code 0 is reserved */
7690                 return -EINVAL;
7691         }
7692
7693         if (info->attrs[NL80211_ATTR_IE]) {
7694                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7695                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7696         }
7697
7698         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7699
7700         wdev_lock(dev->ieee80211_ptr);
7701         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7702                                      local_state_change);
7703         wdev_unlock(dev->ieee80211_ptr);
7704         return err;
7705 }
7706
7707 static bool
7708 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7709                          int mcast_rate[NUM_NL80211_BANDS],
7710                          int rateval)
7711 {
7712         struct wiphy *wiphy = &rdev->wiphy;
7713         bool found = false;
7714         int band, i;
7715
7716         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7717                 struct ieee80211_supported_band *sband;
7718
7719                 sband = wiphy->bands[band];
7720                 if (!sband)
7721                         continue;
7722
7723                 for (i = 0; i < sband->n_bitrates; i++) {
7724                         if (sband->bitrates[i].bitrate == rateval) {
7725                                 mcast_rate[band] = i + 1;
7726                                 found = true;
7727                                 break;
7728                         }
7729                 }
7730         }
7731
7732         return found;
7733 }
7734
7735 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7736 {
7737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7738         struct net_device *dev = info->user_ptr[1];
7739         struct cfg80211_ibss_params ibss;
7740         struct wiphy *wiphy;
7741         struct cfg80211_cached_keys *connkeys = NULL;
7742         int err;
7743
7744         memset(&ibss, 0, sizeof(ibss));
7745
7746         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7747                 return -EINVAL;
7748
7749         if (!info->attrs[NL80211_ATTR_SSID] ||
7750             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7751                 return -EINVAL;
7752
7753         ibss.beacon_interval = 100;
7754
7755         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
7756                 ibss.beacon_interval =
7757                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7758
7759         err = cfg80211_validate_beacon_int(rdev, ibss.beacon_interval);
7760         if (err)
7761                 return err;
7762
7763         if (!rdev->ops->join_ibss)
7764                 return -EOPNOTSUPP;
7765
7766         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7767                 return -EOPNOTSUPP;
7768
7769         wiphy = &rdev->wiphy;
7770
7771         if (info->attrs[NL80211_ATTR_MAC]) {
7772                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7773
7774                 if (!is_valid_ether_addr(ibss.bssid))
7775                         return -EINVAL;
7776         }
7777         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7778         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7779
7780         if (info->attrs[NL80211_ATTR_IE]) {
7781                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7782                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7783         }
7784
7785         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7786         if (err)
7787                 return err;
7788
7789         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7790                                      NL80211_IFTYPE_ADHOC))
7791                 return -EINVAL;
7792
7793         switch (ibss.chandef.width) {
7794         case NL80211_CHAN_WIDTH_5:
7795         case NL80211_CHAN_WIDTH_10:
7796         case NL80211_CHAN_WIDTH_20_NOHT:
7797                 break;
7798         case NL80211_CHAN_WIDTH_20:
7799         case NL80211_CHAN_WIDTH_40:
7800                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7801                         return -EINVAL;
7802                 break;
7803         case NL80211_CHAN_WIDTH_80:
7804         case NL80211_CHAN_WIDTH_80P80:
7805         case NL80211_CHAN_WIDTH_160:
7806                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7807                         return -EINVAL;
7808                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7809                                              NL80211_EXT_FEATURE_VHT_IBSS))
7810                         return -EINVAL;
7811                 break;
7812         default:
7813                 return -EINVAL;
7814         }
7815
7816         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7817         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7818
7819         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7820                 u8 *rates =
7821                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7822                 int n_rates =
7823                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7824                 struct ieee80211_supported_band *sband =
7825                         wiphy->bands[ibss.chandef.chan->band];
7826
7827                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7828                                              &ibss.basic_rates);
7829                 if (err)
7830                         return err;
7831         }
7832
7833         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7834                 memcpy(&ibss.ht_capa_mask,
7835                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7836                        sizeof(ibss.ht_capa_mask));
7837
7838         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7839                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7840                         return -EINVAL;
7841                 memcpy(&ibss.ht_capa,
7842                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7843                        sizeof(ibss.ht_capa));
7844         }
7845
7846         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7847             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7848                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7849                 return -EINVAL;
7850
7851         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7852                 bool no_ht = false;
7853
7854                 connkeys = nl80211_parse_connkeys(rdev,
7855                                           info->attrs[NL80211_ATTR_KEYS],
7856                                           &no_ht);
7857                 if (IS_ERR(connkeys))
7858                         return PTR_ERR(connkeys);
7859
7860                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7861                     no_ht) {
7862                         kzfree(connkeys);
7863                         return -EINVAL;
7864                 }
7865         }
7866
7867         ibss.control_port =
7868                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7869
7870         ibss.userspace_handles_dfs =
7871                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7872
7873         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7874         if (err)
7875                 kzfree(connkeys);
7876         return err;
7877 }
7878
7879 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7880 {
7881         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7882         struct net_device *dev = info->user_ptr[1];
7883
7884         if (!rdev->ops->leave_ibss)
7885                 return -EOPNOTSUPP;
7886
7887         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7888                 return -EOPNOTSUPP;
7889
7890         return cfg80211_leave_ibss(rdev, dev, false);
7891 }
7892
7893 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7894 {
7895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7896         struct net_device *dev = info->user_ptr[1];
7897         int mcast_rate[NUM_NL80211_BANDS];
7898         u32 nla_rate;
7899         int err;
7900
7901         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7902             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7903             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7904                 return -EOPNOTSUPP;
7905
7906         if (!rdev->ops->set_mcast_rate)
7907                 return -EOPNOTSUPP;
7908
7909         memset(mcast_rate, 0, sizeof(mcast_rate));
7910
7911         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7912                 return -EINVAL;
7913
7914         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7915         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7916                 return -EINVAL;
7917
7918         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7919
7920         return err;
7921 }
7922
7923 static struct sk_buff *
7924 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7925                             struct wireless_dev *wdev, int approxlen,
7926                             u32 portid, u32 seq, enum nl80211_commands cmd,
7927                             enum nl80211_attrs attr,
7928                             const struct nl80211_vendor_cmd_info *info,
7929                             gfp_t gfp)
7930 {
7931         struct sk_buff *skb;
7932         void *hdr;
7933         struct nlattr *data;
7934
7935         skb = nlmsg_new(approxlen + 100, gfp);
7936         if (!skb)
7937                 return NULL;
7938
7939         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7940         if (!hdr) {
7941                 kfree_skb(skb);
7942                 return NULL;
7943         }
7944
7945         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7946                 goto nla_put_failure;
7947
7948         if (info) {
7949                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7950                                 info->vendor_id))
7951                         goto nla_put_failure;
7952                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7953                                 info->subcmd))
7954                         goto nla_put_failure;
7955         }
7956
7957         if (wdev) {
7958                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7959                                       wdev_id(wdev), NL80211_ATTR_PAD))
7960                         goto nla_put_failure;
7961                 if (wdev->netdev &&
7962                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7963                                 wdev->netdev->ifindex))
7964                         goto nla_put_failure;
7965         }
7966
7967         data = nla_nest_start(skb, attr);
7968
7969         ((void **)skb->cb)[0] = rdev;
7970         ((void **)skb->cb)[1] = hdr;
7971         ((void **)skb->cb)[2] = data;
7972
7973         return skb;
7974
7975  nla_put_failure:
7976         kfree_skb(skb);
7977         return NULL;
7978 }
7979
7980 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7981                                            struct wireless_dev *wdev,
7982                                            enum nl80211_commands cmd,
7983                                            enum nl80211_attrs attr,
7984                                            int vendor_event_idx,
7985                                            int approxlen, gfp_t gfp)
7986 {
7987         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7988         const struct nl80211_vendor_cmd_info *info;
7989
7990         switch (cmd) {
7991         case NL80211_CMD_TESTMODE:
7992                 if (WARN_ON(vendor_event_idx != -1))
7993                         return NULL;
7994                 info = NULL;
7995                 break;
7996         case NL80211_CMD_VENDOR:
7997                 if (WARN_ON(vendor_event_idx < 0 ||
7998                             vendor_event_idx >= wiphy->n_vendor_events))
7999                         return NULL;
8000                 info = &wiphy->vendor_events[vendor_event_idx];
8001                 break;
8002         default:
8003                 WARN_ON(1);
8004                 return NULL;
8005         }
8006
8007         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8008                                            cmd, attr, info, gfp);
8009 }
8010 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8011
8012 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8013 {
8014         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8015         void *hdr = ((void **)skb->cb)[1];
8016         struct nlattr *data = ((void **)skb->cb)[2];
8017         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8018
8019         /* clear CB data for netlink core to own from now on */
8020         memset(skb->cb, 0, sizeof(skb->cb));
8021
8022         nla_nest_end(skb, data);
8023         genlmsg_end(skb, hdr);
8024
8025         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8026                 mcgrp = NL80211_MCGRP_VENDOR;
8027
8028         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8029                                 mcgrp, gfp);
8030 }
8031 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8032
8033 #ifdef CONFIG_NL80211_TESTMODE
8034 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8035 {
8036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8037         struct wireless_dev *wdev =
8038                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8039         int err;
8040
8041         if (!rdev->ops->testmode_cmd)
8042                 return -EOPNOTSUPP;
8043
8044         if (IS_ERR(wdev)) {
8045                 err = PTR_ERR(wdev);
8046                 if (err != -EINVAL)
8047                         return err;
8048                 wdev = NULL;
8049         } else if (wdev->wiphy != &rdev->wiphy) {
8050                 return -EINVAL;
8051         }
8052
8053         if (!info->attrs[NL80211_ATTR_TESTDATA])
8054                 return -EINVAL;
8055
8056         rdev->cur_cmd_info = info;
8057         err = rdev_testmode_cmd(rdev, wdev,
8058                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8059                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8060         rdev->cur_cmd_info = NULL;
8061
8062         return err;
8063 }
8064
8065 static int nl80211_testmode_dump(struct sk_buff *skb,
8066                                  struct netlink_callback *cb)
8067 {
8068         struct cfg80211_registered_device *rdev;
8069         int err;
8070         long phy_idx;
8071         void *data = NULL;
8072         int data_len = 0;
8073
8074         rtnl_lock();
8075
8076         if (cb->args[0]) {
8077                 /*
8078                  * 0 is a valid index, but not valid for args[0],
8079                  * so we need to offset by 1.
8080                  */
8081                 phy_idx = cb->args[0] - 1;
8082         } else {
8083                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8084                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8085                                   nl80211_policy);
8086                 if (err)
8087                         goto out_err;
8088
8089                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8090                                                   nl80211_fam.attrbuf);
8091                 if (IS_ERR(rdev)) {
8092                         err = PTR_ERR(rdev);
8093                         goto out_err;
8094                 }
8095                 phy_idx = rdev->wiphy_idx;
8096                 rdev = NULL;
8097
8098                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8099                         cb->args[1] =
8100                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8101         }
8102
8103         if (cb->args[1]) {
8104                 data = nla_data((void *)cb->args[1]);
8105                 data_len = nla_len((void *)cb->args[1]);
8106         }
8107
8108         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8109         if (!rdev) {
8110                 err = -ENOENT;
8111                 goto out_err;
8112         }
8113
8114         if (!rdev->ops->testmode_dump) {
8115                 err = -EOPNOTSUPP;
8116                 goto out_err;
8117         }
8118
8119         while (1) {
8120                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8121                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8122                                            NL80211_CMD_TESTMODE);
8123                 struct nlattr *tmdata;
8124
8125                 if (!hdr)
8126                         break;
8127
8128                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8129                         genlmsg_cancel(skb, hdr);
8130                         break;
8131                 }
8132
8133                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8134                 if (!tmdata) {
8135                         genlmsg_cancel(skb, hdr);
8136                         break;
8137                 }
8138                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8139                 nla_nest_end(skb, tmdata);
8140
8141                 if (err == -ENOBUFS || err == -ENOENT) {
8142                         genlmsg_cancel(skb, hdr);
8143                         break;
8144                 } else if (err) {
8145                         genlmsg_cancel(skb, hdr);
8146                         goto out_err;
8147                 }
8148
8149                 genlmsg_end(skb, hdr);
8150         }
8151
8152         err = skb->len;
8153         /* see above */
8154         cb->args[0] = phy_idx + 1;
8155  out_err:
8156         rtnl_unlock();
8157         return err;
8158 }
8159 #endif
8160
8161 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8162 {
8163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8164         struct net_device *dev = info->user_ptr[1];
8165         struct cfg80211_connect_params connect;
8166         struct wiphy *wiphy;
8167         struct cfg80211_cached_keys *connkeys = NULL;
8168         int err;
8169
8170         memset(&connect, 0, sizeof(connect));
8171
8172         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8173                 return -EINVAL;
8174
8175         if (!info->attrs[NL80211_ATTR_SSID] ||
8176             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8177                 return -EINVAL;
8178
8179         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8180                 connect.auth_type =
8181                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8182                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8183                                              NL80211_CMD_CONNECT))
8184                         return -EINVAL;
8185         } else
8186                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8187
8188         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8189
8190         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8191                                       NL80211_MAX_NR_CIPHER_SUITES);
8192         if (err)
8193                 return err;
8194
8195         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8196             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8197                 return -EOPNOTSUPP;
8198
8199         wiphy = &rdev->wiphy;
8200
8201         connect.bg_scan_period = -1;
8202         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8203                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8204                 connect.bg_scan_period =
8205                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8206         }
8207
8208         if (info->attrs[NL80211_ATTR_MAC])
8209                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8210         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8211                 connect.bssid_hint =
8212                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8213         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8214         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8215
8216         if (info->attrs[NL80211_ATTR_IE]) {
8217                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8218                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8219         }
8220
8221         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8222                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8223                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8224                     connect.mfp != NL80211_MFP_NO)
8225                         return -EINVAL;
8226         } else {
8227                 connect.mfp = NL80211_MFP_NO;
8228         }
8229
8230         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8231                 connect.prev_bssid =
8232                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8233
8234         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8235                 connect.channel = nl80211_get_valid_chan(
8236                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8237                 if (!connect.channel)
8238                         return -EINVAL;
8239         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8240                 connect.channel_hint = nl80211_get_valid_chan(
8241                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8242                 if (!connect.channel_hint)
8243                         return -EINVAL;
8244         }
8245
8246         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8247                 connkeys = nl80211_parse_connkeys(rdev,
8248                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8249                 if (IS_ERR(connkeys))
8250                         return PTR_ERR(connkeys);
8251         }
8252
8253         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8254                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8255
8256         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8257                 memcpy(&connect.ht_capa_mask,
8258                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8259                        sizeof(connect.ht_capa_mask));
8260
8261         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8262                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8263                         kzfree(connkeys);
8264                         return -EINVAL;
8265                 }
8266                 memcpy(&connect.ht_capa,
8267                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8268                        sizeof(connect.ht_capa));
8269         }
8270
8271         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8272                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8273
8274         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8275                 memcpy(&connect.vht_capa_mask,
8276                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8277                        sizeof(connect.vht_capa_mask));
8278
8279         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8280                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8281                         kzfree(connkeys);
8282                         return -EINVAL;
8283                 }
8284                 memcpy(&connect.vht_capa,
8285                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8286                        sizeof(connect.vht_capa));
8287         }
8288
8289         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8290                 if (!((rdev->wiphy.features &
8291                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8292                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8293                     !wiphy_ext_feature_isset(&rdev->wiphy,
8294                                              NL80211_EXT_FEATURE_RRM)) {
8295                         kzfree(connkeys);
8296                         return -EINVAL;
8297                 }
8298                 connect.flags |= ASSOC_REQ_USE_RRM;
8299         }
8300
8301         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8302         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8303                 kzfree(connkeys);
8304                 return -EOPNOTSUPP;
8305         }
8306
8307         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8308                 /* bss selection makes no sense if bssid is set */
8309                 if (connect.bssid) {
8310                         kzfree(connkeys);
8311                         return -EINVAL;
8312                 }
8313
8314                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8315                                        wiphy, &connect.bss_select);
8316                 if (err) {
8317                         kzfree(connkeys);
8318                         return err;
8319                 }
8320         }
8321
8322         wdev_lock(dev->ieee80211_ptr);
8323         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8324                                connect.prev_bssid);
8325         wdev_unlock(dev->ieee80211_ptr);
8326         if (err)
8327                 kzfree(connkeys);
8328         return err;
8329 }
8330
8331 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8332 {
8333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8334         struct net_device *dev = info->user_ptr[1];
8335         u16 reason;
8336         int ret;
8337
8338         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8339                 reason = WLAN_REASON_DEAUTH_LEAVING;
8340         else
8341                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8342
8343         if (reason == 0)
8344                 return -EINVAL;
8345
8346         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8347             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8348                 return -EOPNOTSUPP;
8349
8350         wdev_lock(dev->ieee80211_ptr);
8351         ret = cfg80211_disconnect(rdev, dev, reason, true);
8352         wdev_unlock(dev->ieee80211_ptr);
8353         return ret;
8354 }
8355
8356 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8357 {
8358         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8359         struct net *net;
8360         int err;
8361
8362         if (info->attrs[NL80211_ATTR_PID]) {
8363                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8364
8365                 net = get_net_ns_by_pid(pid);
8366         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8367                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8368
8369                 net = get_net_ns_by_fd(fd);
8370         } else {
8371                 return -EINVAL;
8372         }
8373
8374         if (IS_ERR(net))
8375                 return PTR_ERR(net);
8376
8377         err = 0;
8378
8379         /* check if anything to do */
8380         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8381                 err = cfg80211_switch_netns(rdev, net);
8382
8383         put_net(net);
8384         return err;
8385 }
8386
8387 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8388 {
8389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8390         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8391                         struct cfg80211_pmksa *pmksa) = NULL;
8392         struct net_device *dev = info->user_ptr[1];
8393         struct cfg80211_pmksa pmksa;
8394
8395         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8396
8397         if (!info->attrs[NL80211_ATTR_MAC])
8398                 return -EINVAL;
8399
8400         if (!info->attrs[NL80211_ATTR_PMKID])
8401                 return -EINVAL;
8402
8403         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8404         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8405
8406         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8407             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8408                 return -EOPNOTSUPP;
8409
8410         switch (info->genlhdr->cmd) {
8411         case NL80211_CMD_SET_PMKSA:
8412                 rdev_ops = rdev->ops->set_pmksa;
8413                 break;
8414         case NL80211_CMD_DEL_PMKSA:
8415                 rdev_ops = rdev->ops->del_pmksa;
8416                 break;
8417         default:
8418                 WARN_ON(1);
8419                 break;
8420         }
8421
8422         if (!rdev_ops)
8423                 return -EOPNOTSUPP;
8424
8425         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8426 }
8427
8428 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8429 {
8430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8431         struct net_device *dev = info->user_ptr[1];
8432
8433         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8434             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8435                 return -EOPNOTSUPP;
8436
8437         if (!rdev->ops->flush_pmksa)
8438                 return -EOPNOTSUPP;
8439
8440         return rdev_flush_pmksa(rdev, dev);
8441 }
8442
8443 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8444 {
8445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8446         struct net_device *dev = info->user_ptr[1];
8447         u8 action_code, dialog_token;
8448         u32 peer_capability = 0;
8449         u16 status_code;
8450         u8 *peer;
8451         bool initiator;
8452
8453         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8454             !rdev->ops->tdls_mgmt)
8455                 return -EOPNOTSUPP;
8456
8457         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8458             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8459             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8460             !info->attrs[NL80211_ATTR_IE] ||
8461             !info->attrs[NL80211_ATTR_MAC])
8462                 return -EINVAL;
8463
8464         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8465         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8466         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8467         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8468         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8469         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8470                 peer_capability =
8471                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8472
8473         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8474                               dialog_token, status_code, peer_capability,
8475                               initiator,
8476                               nla_data(info->attrs[NL80211_ATTR_IE]),
8477                               nla_len(info->attrs[NL80211_ATTR_IE]));
8478 }
8479
8480 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8481 {
8482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8483         struct net_device *dev = info->user_ptr[1];
8484         enum nl80211_tdls_operation operation;
8485         u8 *peer;
8486
8487         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8488             !rdev->ops->tdls_oper)
8489                 return -EOPNOTSUPP;
8490
8491         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8492             !info->attrs[NL80211_ATTR_MAC])
8493                 return -EINVAL;
8494
8495         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8496         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8497
8498         return rdev_tdls_oper(rdev, dev, peer, operation);
8499 }
8500
8501 static int nl80211_remain_on_channel(struct sk_buff *skb,
8502                                      struct genl_info *info)
8503 {
8504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8505         struct wireless_dev *wdev = info->user_ptr[1];
8506         struct cfg80211_chan_def chandef;
8507         struct sk_buff *msg;
8508         void *hdr;
8509         u64 cookie;
8510         u32 duration;
8511         int err;
8512
8513         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8514             !info->attrs[NL80211_ATTR_DURATION])
8515                 return -EINVAL;
8516
8517         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8518
8519         if (!rdev->ops->remain_on_channel ||
8520             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8521                 return -EOPNOTSUPP;
8522
8523         /*
8524          * We should be on that channel for at least a minimum amount of
8525          * time (10ms) but no longer than the driver supports.
8526          */
8527         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8528             duration > rdev->wiphy.max_remain_on_channel_duration)
8529                 return -EINVAL;
8530
8531         err = nl80211_parse_chandef(rdev, info, &chandef);
8532         if (err)
8533                 return err;
8534
8535         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8536         if (!msg)
8537                 return -ENOMEM;
8538
8539         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8540                              NL80211_CMD_REMAIN_ON_CHANNEL);
8541         if (!hdr) {
8542                 err = -ENOBUFS;
8543                 goto free_msg;
8544         }
8545
8546         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8547                                      duration, &cookie);
8548
8549         if (err)
8550                 goto free_msg;
8551
8552         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8553                               NL80211_ATTR_PAD))
8554                 goto nla_put_failure;
8555
8556         genlmsg_end(msg, hdr);
8557
8558         return genlmsg_reply(msg, info);
8559
8560  nla_put_failure:
8561         err = -ENOBUFS;
8562  free_msg:
8563         nlmsg_free(msg);
8564         return err;
8565 }
8566
8567 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8568                                             struct genl_info *info)
8569 {
8570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8571         struct wireless_dev *wdev = info->user_ptr[1];
8572         u64 cookie;
8573
8574         if (!info->attrs[NL80211_ATTR_COOKIE])
8575                 return -EINVAL;
8576
8577         if (!rdev->ops->cancel_remain_on_channel)
8578                 return -EOPNOTSUPP;
8579
8580         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8581
8582         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8583 }
8584
8585 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8586                            u8 *rates, u8 rates_len)
8587 {
8588         u8 i;
8589         u32 mask = 0;
8590
8591         for (i = 0; i < rates_len; i++) {
8592                 int rate = (rates[i] & 0x7f) * 5;
8593                 int ridx;
8594
8595                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8596                         struct ieee80211_rate *srate =
8597                                 &sband->bitrates[ridx];
8598                         if (rate == srate->bitrate) {
8599                                 mask |= 1 << ridx;
8600                                 break;
8601                         }
8602                 }
8603                 if (ridx == sband->n_bitrates)
8604                         return 0; /* rate not found */
8605         }
8606
8607         return mask;
8608 }
8609
8610 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8611                                u8 *rates, u8 rates_len,
8612                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8613 {
8614         u8 i;
8615
8616         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8617
8618         for (i = 0; i < rates_len; i++) {
8619                 int ridx, rbit;
8620
8621                 ridx = rates[i] / 8;
8622                 rbit = BIT(rates[i] % 8);
8623
8624                 /* check validity */
8625                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8626                         return false;
8627
8628                 /* check availability */
8629                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8630                         mcs[ridx] |= rbit;
8631                 else
8632                         return false;
8633         }
8634
8635         return true;
8636 }
8637
8638 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8639 {
8640         u16 mcs_mask = 0;
8641
8642         switch (vht_mcs_map) {
8643         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8644                 break;
8645         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8646                 mcs_mask = 0x00FF;
8647                 break;
8648         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8649                 mcs_mask = 0x01FF;
8650                 break;
8651         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8652                 mcs_mask = 0x03FF;
8653                 break;
8654         default:
8655                 break;
8656         }
8657
8658         return mcs_mask;
8659 }
8660
8661 static void vht_build_mcs_mask(u16 vht_mcs_map,
8662                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8663 {
8664         u8 nss;
8665
8666         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8667                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8668                 vht_mcs_map >>= 2;
8669         }
8670 }
8671
8672 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8673                              struct nl80211_txrate_vht *txrate,
8674                              u16 mcs[NL80211_VHT_NSS_MAX])
8675 {
8676         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8677         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8678         u8 i;
8679
8680         if (!sband->vht_cap.vht_supported)
8681                 return false;
8682
8683         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8684
8685         /* Build vht_mcs_mask from VHT capabilities */
8686         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8687
8688         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8689                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8690                         mcs[i] = txrate->mcs[i];
8691                 else
8692                         return false;
8693         }
8694
8695         return true;
8696 }
8697
8698 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8699         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8700                                     .len = NL80211_MAX_SUPP_RATES },
8701         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8702                                 .len = NL80211_MAX_SUPP_HT_RATES },
8703         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8704         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8705 };
8706
8707 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8708                                        struct genl_info *info)
8709 {
8710         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8711         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8712         struct cfg80211_bitrate_mask mask;
8713         int rem, i;
8714         struct net_device *dev = info->user_ptr[1];
8715         struct nlattr *tx_rates;
8716         struct ieee80211_supported_band *sband;
8717         u16 vht_tx_mcs_map;
8718
8719         if (!rdev->ops->set_bitrate_mask)
8720                 return -EOPNOTSUPP;
8721
8722         memset(&mask, 0, sizeof(mask));
8723         /* Default to all rates enabled */
8724         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8725                 sband = rdev->wiphy.bands[i];
8726
8727                 if (!sband)
8728                         continue;
8729
8730                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8731                 memcpy(mask.control[i].ht_mcs,
8732                        sband->ht_cap.mcs.rx_mask,
8733                        sizeof(mask.control[i].ht_mcs));
8734
8735                 if (!sband->vht_cap.vht_supported)
8736                         continue;
8737
8738                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8739                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8740         }
8741
8742         /* if no rates are given set it back to the defaults */
8743         if (!info->attrs[NL80211_ATTR_TX_RATES])
8744                 goto out;
8745
8746         /*
8747          * The nested attribute uses enum nl80211_band as the index. This maps
8748          * directly to the enum nl80211_band values used in cfg80211.
8749          */
8750         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8751         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8752                 enum nl80211_band band = nla_type(tx_rates);
8753                 int err;
8754
8755                 if (band < 0 || band >= NUM_NL80211_BANDS)
8756                         return -EINVAL;
8757                 sband = rdev->wiphy.bands[band];
8758                 if (sband == NULL)
8759                         return -EINVAL;
8760                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8761                                 nla_len(tx_rates), nl80211_txattr_policy);
8762                 if (err)
8763                         return err;
8764                 if (tb[NL80211_TXRATE_LEGACY]) {
8765                         mask.control[band].legacy = rateset_to_mask(
8766                                 sband,
8767                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8768                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8769                         if ((mask.control[band].legacy == 0) &&
8770                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8771                                 return -EINVAL;
8772                 }
8773                 if (tb[NL80211_TXRATE_HT]) {
8774                         if (!ht_rateset_to_mask(
8775                                         sband,
8776                                         nla_data(tb[NL80211_TXRATE_HT]),
8777                                         nla_len(tb[NL80211_TXRATE_HT]),
8778                                         mask.control[band].ht_mcs))
8779                                 return -EINVAL;
8780                 }
8781                 if (tb[NL80211_TXRATE_VHT]) {
8782                         if (!vht_set_mcs_mask(
8783                                         sband,
8784                                         nla_data(tb[NL80211_TXRATE_VHT]),
8785                                         mask.control[band].vht_mcs))
8786                                 return -EINVAL;
8787                 }
8788                 if (tb[NL80211_TXRATE_GI]) {
8789                         mask.control[band].gi =
8790                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8791                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8792                                 return -EINVAL;
8793                 }
8794
8795                 if (mask.control[band].legacy == 0) {
8796                         /* don't allow empty legacy rates if HT or VHT
8797                          * are not even supported.
8798                          */
8799                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8800                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8801                                 return -EINVAL;
8802
8803                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8804                                 if (mask.control[band].ht_mcs[i])
8805                                         goto out;
8806
8807                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8808                                 if (mask.control[band].vht_mcs[i])
8809                                         goto out;
8810
8811                         /* legacy and mcs rates may not be both empty */
8812                         return -EINVAL;
8813                 }
8814         }
8815
8816 out:
8817         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8818 }
8819
8820 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8821 {
8822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8823         struct wireless_dev *wdev = info->user_ptr[1];
8824         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8825
8826         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8827                 return -EINVAL;
8828
8829         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8830                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8831
8832         switch (wdev->iftype) {
8833         case NL80211_IFTYPE_STATION:
8834         case NL80211_IFTYPE_ADHOC:
8835         case NL80211_IFTYPE_P2P_CLIENT:
8836         case NL80211_IFTYPE_AP:
8837         case NL80211_IFTYPE_AP_VLAN:
8838         case NL80211_IFTYPE_MESH_POINT:
8839         case NL80211_IFTYPE_P2P_GO:
8840         case NL80211_IFTYPE_P2P_DEVICE:
8841                 break;
8842         default:
8843                 return -EOPNOTSUPP;
8844         }
8845
8846         /* not much point in registering if we can't reply */
8847         if (!rdev->ops->mgmt_tx)
8848                 return -EOPNOTSUPP;
8849
8850         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8851                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8852                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8853 }
8854
8855 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8856 {
8857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8858         struct wireless_dev *wdev = info->user_ptr[1];
8859         struct cfg80211_chan_def chandef;
8860         int err;
8861         void *hdr = NULL;
8862         u64 cookie;
8863         struct sk_buff *msg = NULL;
8864         struct cfg80211_mgmt_tx_params params = {
8865                 .dont_wait_for_ack =
8866                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8867         };
8868
8869         if (!info->attrs[NL80211_ATTR_FRAME])
8870                 return -EINVAL;
8871
8872         if (!rdev->ops->mgmt_tx)
8873                 return -EOPNOTSUPP;
8874
8875         switch (wdev->iftype) {
8876         case NL80211_IFTYPE_P2P_DEVICE:
8877                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8878                         return -EINVAL;
8879         case NL80211_IFTYPE_STATION:
8880         case NL80211_IFTYPE_ADHOC:
8881         case NL80211_IFTYPE_P2P_CLIENT:
8882         case NL80211_IFTYPE_AP:
8883         case NL80211_IFTYPE_AP_VLAN:
8884         case NL80211_IFTYPE_MESH_POINT:
8885         case NL80211_IFTYPE_P2P_GO:
8886                 break;
8887         default:
8888                 return -EOPNOTSUPP;
8889         }
8890
8891         if (info->attrs[NL80211_ATTR_DURATION]) {
8892                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8893                         return -EINVAL;
8894                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8895
8896                 /*
8897                  * We should wait on the channel for at least a minimum amount
8898                  * of time (10ms) but no longer than the driver supports.
8899                  */
8900                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8901                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8902                         return -EINVAL;
8903         }
8904
8905         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8906
8907         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8908                 return -EINVAL;
8909
8910         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8911
8912         /* get the channel if any has been specified, otherwise pass NULL to
8913          * the driver. The latter will use the current one
8914          */
8915         chandef.chan = NULL;
8916         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8917                 err = nl80211_parse_chandef(rdev, info, &chandef);
8918                 if (err)
8919                         return err;
8920         }
8921
8922         if (!chandef.chan && params.offchan)
8923                 return -EINVAL;
8924
8925         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8926         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8927
8928         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8929                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8930                 int i;
8931
8932                 if (len % sizeof(u16))
8933                         return -EINVAL;
8934
8935                 params.n_csa_offsets = len / sizeof(u16);
8936                 params.csa_offsets =
8937                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8938
8939                 /* check that all the offsets fit the frame */
8940                 for (i = 0; i < params.n_csa_offsets; i++) {
8941                         if (params.csa_offsets[i] >= params.len)
8942                                 return -EINVAL;
8943                 }
8944         }
8945
8946         if (!params.dont_wait_for_ack) {
8947                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8948                 if (!msg)
8949                         return -ENOMEM;
8950
8951                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8952                                      NL80211_CMD_FRAME);
8953                 if (!hdr) {
8954                         err = -ENOBUFS;
8955                         goto free_msg;
8956                 }
8957         }
8958
8959         params.chan = chandef.chan;
8960         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8961         if (err)
8962                 goto free_msg;
8963
8964         if (msg) {
8965                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8966                                       NL80211_ATTR_PAD))
8967                         goto nla_put_failure;
8968
8969                 genlmsg_end(msg, hdr);
8970                 return genlmsg_reply(msg, info);
8971         }
8972
8973         return 0;
8974
8975  nla_put_failure:
8976         err = -ENOBUFS;
8977  free_msg:
8978         nlmsg_free(msg);
8979         return err;
8980 }
8981
8982 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8983 {
8984         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8985         struct wireless_dev *wdev = info->user_ptr[1];
8986         u64 cookie;
8987
8988         if (!info->attrs[NL80211_ATTR_COOKIE])
8989                 return -EINVAL;
8990
8991         if (!rdev->ops->mgmt_tx_cancel_wait)
8992                 return -EOPNOTSUPP;
8993
8994         switch (wdev->iftype) {
8995         case NL80211_IFTYPE_STATION:
8996         case NL80211_IFTYPE_ADHOC:
8997         case NL80211_IFTYPE_P2P_CLIENT:
8998         case NL80211_IFTYPE_AP:
8999         case NL80211_IFTYPE_AP_VLAN:
9000         case NL80211_IFTYPE_P2P_GO:
9001         case NL80211_IFTYPE_P2P_DEVICE:
9002                 break;
9003         default:
9004                 return -EOPNOTSUPP;
9005         }
9006
9007         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9008
9009         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9010 }
9011
9012 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9013 {
9014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9015         struct wireless_dev *wdev;
9016         struct net_device *dev = info->user_ptr[1];
9017         u8 ps_state;
9018         bool state;
9019         int err;
9020
9021         if (!info->attrs[NL80211_ATTR_PS_STATE])
9022                 return -EINVAL;
9023
9024         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9025
9026         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9027                 return -EINVAL;
9028
9029         wdev = dev->ieee80211_ptr;
9030
9031         if (!rdev->ops->set_power_mgmt)
9032                 return -EOPNOTSUPP;
9033
9034         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9035
9036         if (state == wdev->ps)
9037                 return 0;
9038
9039         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9040         if (!err)
9041                 wdev->ps = state;
9042         return err;
9043 }
9044
9045 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9046 {
9047         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9048         enum nl80211_ps_state ps_state;
9049         struct wireless_dev *wdev;
9050         struct net_device *dev = info->user_ptr[1];
9051         struct sk_buff *msg;
9052         void *hdr;
9053         int err;
9054
9055         wdev = dev->ieee80211_ptr;
9056
9057         if (!rdev->ops->set_power_mgmt)
9058                 return -EOPNOTSUPP;
9059
9060         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9061         if (!msg)
9062                 return -ENOMEM;
9063
9064         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9065                              NL80211_CMD_GET_POWER_SAVE);
9066         if (!hdr) {
9067                 err = -ENOBUFS;
9068                 goto free_msg;
9069         }
9070
9071         if (wdev->ps)
9072                 ps_state = NL80211_PS_ENABLED;
9073         else
9074                 ps_state = NL80211_PS_DISABLED;
9075
9076         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9077                 goto nla_put_failure;
9078
9079         genlmsg_end(msg, hdr);
9080         return genlmsg_reply(msg, info);
9081
9082  nla_put_failure:
9083         err = -ENOBUFS;
9084  free_msg:
9085         nlmsg_free(msg);
9086         return err;
9087 }
9088
9089 static const struct nla_policy
9090 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9091         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9092         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9093         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9094         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9095         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9096         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9097 };
9098
9099 static int nl80211_set_cqm_txe(struct genl_info *info,
9100                                u32 rate, u32 pkts, u32 intvl)
9101 {
9102         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9103         struct net_device *dev = info->user_ptr[1];
9104         struct wireless_dev *wdev = dev->ieee80211_ptr;
9105
9106         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9107                 return -EINVAL;
9108
9109         if (!rdev->ops->set_cqm_txe_config)
9110                 return -EOPNOTSUPP;
9111
9112         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9113             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9114                 return -EOPNOTSUPP;
9115
9116         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9117 }
9118
9119 static int nl80211_set_cqm_rssi(struct genl_info *info,
9120                                 s32 threshold, u32 hysteresis)
9121 {
9122         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9123         struct net_device *dev = info->user_ptr[1];
9124         struct wireless_dev *wdev = dev->ieee80211_ptr;
9125
9126         if (threshold > 0)
9127                 return -EINVAL;
9128
9129         /* disabling - hysteresis should also be zero then */
9130         if (threshold == 0)
9131                 hysteresis = 0;
9132
9133         if (!rdev->ops->set_cqm_rssi_config)
9134                 return -EOPNOTSUPP;
9135
9136         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9137             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9138                 return -EOPNOTSUPP;
9139
9140         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9141 }
9142
9143 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9144 {
9145         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9146         struct nlattr *cqm;
9147         int err;
9148
9149         cqm = info->attrs[NL80211_ATTR_CQM];
9150         if (!cqm)
9151                 return -EINVAL;
9152
9153         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9154                                nl80211_attr_cqm_policy);
9155         if (err)
9156                 return err;
9157
9158         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9159             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9160                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9161                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9162
9163                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9164         }
9165
9166         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9167             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9168             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9169                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9170                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9171                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9172
9173                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9174         }
9175
9176         return -EINVAL;
9177 }
9178
9179 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9180 {
9181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9182         struct net_device *dev = info->user_ptr[1];
9183         struct ocb_setup setup = {};
9184         int err;
9185
9186         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9187         if (err)
9188                 return err;
9189
9190         return cfg80211_join_ocb(rdev, dev, &setup);
9191 }
9192
9193 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9194 {
9195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9196         struct net_device *dev = info->user_ptr[1];
9197
9198         return cfg80211_leave_ocb(rdev, dev);
9199 }
9200
9201 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9202 {
9203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9204         struct net_device *dev = info->user_ptr[1];
9205         struct mesh_config cfg;
9206         struct mesh_setup setup;
9207         int err;
9208
9209         /* start with default */
9210         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9211         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9212
9213         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9214                 /* and parse parameters if given */
9215                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9216                 if (err)
9217                         return err;
9218         }
9219
9220         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9221             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9222                 return -EINVAL;
9223
9224         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9225         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9226
9227         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9228             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9229                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9230                         return -EINVAL;
9231
9232         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9233                 setup.beacon_interval =
9234                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9235
9236                 err = cfg80211_validate_beacon_int(rdev, setup.beacon_interval);
9237                 if (err)
9238                         return err;
9239         }
9240
9241         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9242                 setup.dtim_period =
9243                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9244                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9245                         return -EINVAL;
9246         }
9247
9248         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9249                 /* parse additional setup parameters if given */
9250                 err = nl80211_parse_mesh_setup(info, &setup);
9251                 if (err)
9252                         return err;
9253         }
9254
9255         if (setup.user_mpm)
9256                 cfg.auto_open_plinks = false;
9257
9258         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9259                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9260                 if (err)
9261                         return err;
9262         } else {
9263                 /* cfg80211_join_mesh() will sort it out */
9264                 setup.chandef.chan = NULL;
9265         }
9266
9267         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9268                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9269                 int n_rates =
9270                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9271                 struct ieee80211_supported_band *sband;
9272
9273                 if (!setup.chandef.chan)
9274                         return -EINVAL;
9275
9276                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9277
9278                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9279                                              &setup.basic_rates);
9280                 if (err)
9281                         return err;
9282         }
9283
9284         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9285 }
9286
9287 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9288 {
9289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9290         struct net_device *dev = info->user_ptr[1];
9291
9292         return cfg80211_leave_mesh(rdev, dev);
9293 }
9294
9295 #ifdef CONFIG_PM
9296 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9297                                         struct cfg80211_registered_device *rdev)
9298 {
9299         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9300         struct nlattr *nl_pats, *nl_pat;
9301         int i, pat_len;
9302
9303         if (!wowlan->n_patterns)
9304                 return 0;
9305
9306         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9307         if (!nl_pats)
9308                 return -ENOBUFS;
9309
9310         for (i = 0; i < wowlan->n_patterns; i++) {
9311                 nl_pat = nla_nest_start(msg, i + 1);
9312                 if (!nl_pat)
9313                         return -ENOBUFS;
9314                 pat_len = wowlan->patterns[i].pattern_len;
9315                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9316                             wowlan->patterns[i].mask) ||
9317                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9318                             wowlan->patterns[i].pattern) ||
9319                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9320                                 wowlan->patterns[i].pkt_offset))
9321                         return -ENOBUFS;
9322                 nla_nest_end(msg, nl_pat);
9323         }
9324         nla_nest_end(msg, nl_pats);
9325
9326         return 0;
9327 }
9328
9329 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9330                                    struct cfg80211_wowlan_tcp *tcp)
9331 {
9332         struct nlattr *nl_tcp;
9333
9334         if (!tcp)
9335                 return 0;
9336
9337         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9338         if (!nl_tcp)
9339                 return -ENOBUFS;
9340
9341         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9342             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9343             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9344             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9345             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9346             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9347                     tcp->payload_len, tcp->payload) ||
9348             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9349                         tcp->data_interval) ||
9350             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9351                     tcp->wake_len, tcp->wake_data) ||
9352             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9353                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9354                 return -ENOBUFS;
9355
9356         if (tcp->payload_seq.len &&
9357             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9358                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9359                 return -ENOBUFS;
9360
9361         if (tcp->payload_tok.len &&
9362             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9363                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9364                     &tcp->payload_tok))
9365                 return -ENOBUFS;
9366
9367         nla_nest_end(msg, nl_tcp);
9368
9369         return 0;
9370 }
9371
9372 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9373                                   struct cfg80211_sched_scan_request *req)
9374 {
9375         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9376         int i;
9377
9378         if (!req)
9379                 return 0;
9380
9381         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9382         if (!nd)
9383                 return -ENOBUFS;
9384
9385         if (req->n_scan_plans == 1 &&
9386             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9387                         req->scan_plans[0].interval * 1000))
9388                 return -ENOBUFS;
9389
9390         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9391                 return -ENOBUFS;
9392
9393         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9394         if (!freqs)
9395                 return -ENOBUFS;
9396
9397         for (i = 0; i < req->n_channels; i++)
9398                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9399
9400         nla_nest_end(msg, freqs);
9401
9402         if (req->n_match_sets) {
9403                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9404                 for (i = 0; i < req->n_match_sets; i++) {
9405                         match = nla_nest_start(msg, i);
9406                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9407                                 req->match_sets[i].ssid.ssid_len,
9408                                 req->match_sets[i].ssid.ssid);
9409                         nla_nest_end(msg, match);
9410                 }
9411                 nla_nest_end(msg, matches);
9412         }
9413
9414         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9415         if (!scan_plans)
9416                 return -ENOBUFS;
9417
9418         for (i = 0; i < req->n_scan_plans; i++) {
9419                 scan_plan = nla_nest_start(msg, i + 1);
9420                 if (!scan_plan ||
9421                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9422                                 req->scan_plans[i].interval) ||
9423                     (req->scan_plans[i].iterations &&
9424                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9425                                  req->scan_plans[i].iterations)))
9426                         return -ENOBUFS;
9427                 nla_nest_end(msg, scan_plan);
9428         }
9429         nla_nest_end(msg, scan_plans);
9430
9431         nla_nest_end(msg, nd);
9432
9433         return 0;
9434 }
9435
9436 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9437 {
9438         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9439         struct sk_buff *msg;
9440         void *hdr;
9441         u32 size = NLMSG_DEFAULT_SIZE;
9442
9443         if (!rdev->wiphy.wowlan)
9444                 return -EOPNOTSUPP;
9445
9446         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9447                 /* adjust size to have room for all the data */
9448                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9449                         rdev->wiphy.wowlan_config->tcp->payload_len +
9450                         rdev->wiphy.wowlan_config->tcp->wake_len +
9451                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9452         }
9453
9454         msg = nlmsg_new(size, GFP_KERNEL);
9455         if (!msg)
9456                 return -ENOMEM;
9457
9458         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9459                              NL80211_CMD_GET_WOWLAN);
9460         if (!hdr)
9461                 goto nla_put_failure;
9462
9463         if (rdev->wiphy.wowlan_config) {
9464                 struct nlattr *nl_wowlan;
9465
9466                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9467                 if (!nl_wowlan)
9468                         goto nla_put_failure;
9469
9470                 if ((rdev->wiphy.wowlan_config->any &&
9471                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9472                     (rdev->wiphy.wowlan_config->disconnect &&
9473                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9474                     (rdev->wiphy.wowlan_config->magic_pkt &&
9475                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9476                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9477                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9478                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9479                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9480                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9481                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9482                     (rdev->wiphy.wowlan_config->rfkill_release &&
9483                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9484                         goto nla_put_failure;
9485
9486                 if (nl80211_send_wowlan_patterns(msg, rdev))
9487                         goto nla_put_failure;
9488
9489                 if (nl80211_send_wowlan_tcp(msg,
9490                                             rdev->wiphy.wowlan_config->tcp))
9491                         goto nla_put_failure;
9492
9493                 if (nl80211_send_wowlan_nd(
9494                             msg,
9495                             rdev->wiphy.wowlan_config->nd_config))
9496                         goto nla_put_failure;
9497
9498                 nla_nest_end(msg, nl_wowlan);
9499         }
9500
9501         genlmsg_end(msg, hdr);
9502         return genlmsg_reply(msg, info);
9503
9504 nla_put_failure:
9505         nlmsg_free(msg);
9506         return -ENOBUFS;
9507 }
9508
9509 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9510                                     struct nlattr *attr,
9511                                     struct cfg80211_wowlan *trig)
9512 {
9513         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9514         struct cfg80211_wowlan_tcp *cfg;
9515         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9516         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9517         u32 size;
9518         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9519         int err, port;
9520
9521         if (!rdev->wiphy.wowlan->tcp)
9522                 return -EINVAL;
9523
9524         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9525                         nla_data(attr), nla_len(attr),
9526                         nl80211_wowlan_tcp_policy);
9527         if (err)
9528                 return err;
9529
9530         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9531             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9532             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9533             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9534             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9535             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9536             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9537             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9538                 return -EINVAL;
9539
9540         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9541         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9542                 return -EINVAL;
9543
9544         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9545                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9546             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9547                 return -EINVAL;
9548
9549         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9550         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9551                 return -EINVAL;
9552
9553         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9554         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9555                 return -EINVAL;
9556
9557         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9558                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9559
9560                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9561                 tokens_size = tokln - sizeof(*tok);
9562
9563                 if (!tok->len || tokens_size % tok->len)
9564                         return -EINVAL;
9565                 if (!rdev->wiphy.wowlan->tcp->tok)
9566                         return -EINVAL;
9567                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9568                         return -EINVAL;
9569                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9570                         return -EINVAL;
9571                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9572                         return -EINVAL;
9573                 if (tok->offset + tok->len > data_size)
9574                         return -EINVAL;
9575         }
9576
9577         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9578                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9579                 if (!rdev->wiphy.wowlan->tcp->seq)
9580                         return -EINVAL;
9581                 if (seq->len == 0 || seq->len > 4)
9582                         return -EINVAL;
9583                 if (seq->len + seq->offset > data_size)
9584                         return -EINVAL;
9585         }
9586
9587         size = sizeof(*cfg);
9588         size += data_size;
9589         size += wake_size + wake_mask_size;
9590         size += tokens_size;
9591
9592         cfg = kzalloc(size, GFP_KERNEL);
9593         if (!cfg)
9594                 return -ENOMEM;
9595         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9596         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9597         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9598                ETH_ALEN);
9599         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9600                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9601         else
9602                 port = 0;
9603 #ifdef CONFIG_INET
9604         /* allocate a socket and port for it and use it */
9605         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9606                             IPPROTO_TCP, &cfg->sock, 1);
9607         if (err) {
9608                 kfree(cfg);
9609                 return err;
9610         }
9611         if (inet_csk_get_port(cfg->sock->sk, port)) {
9612                 sock_release(cfg->sock);
9613                 kfree(cfg);
9614                 return -EADDRINUSE;
9615         }
9616         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9617 #else
9618         if (!port) {
9619                 kfree(cfg);
9620                 return -EINVAL;
9621         }
9622         cfg->src_port = port;
9623 #endif
9624
9625         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9626         cfg->payload_len = data_size;
9627         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9628         memcpy((void *)cfg->payload,
9629                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9630                data_size);
9631         if (seq)
9632                 cfg->payload_seq = *seq;
9633         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9634         cfg->wake_len = wake_size;
9635         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9636         memcpy((void *)cfg->wake_data,
9637                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9638                wake_size);
9639         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9640                          data_size + wake_size;
9641         memcpy((void *)cfg->wake_mask,
9642                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9643                wake_mask_size);
9644         if (tok) {
9645                 cfg->tokens_size = tokens_size;
9646                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9647         }
9648
9649         trig->tcp = cfg;
9650
9651         return 0;
9652 }
9653
9654 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9655                                    const struct wiphy_wowlan_support *wowlan,
9656                                    struct nlattr *attr,
9657                                    struct cfg80211_wowlan *trig)
9658 {
9659         struct nlattr **tb;
9660         int err;
9661
9662         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9663         if (!tb)
9664                 return -ENOMEM;
9665
9666         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9667                 err = -EOPNOTSUPP;
9668                 goto out;
9669         }
9670
9671         err = nla_parse(tb, NL80211_ATTR_MAX,
9672                         nla_data(attr), nla_len(attr),
9673                         nl80211_policy);
9674         if (err)
9675                 goto out;
9676
9677         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9678         err = PTR_ERR_OR_ZERO(trig->nd_config);
9679         if (err)
9680                 trig->nd_config = NULL;
9681
9682 out:
9683         kfree(tb);
9684         return err;
9685 }
9686
9687 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9688 {
9689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9690         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9691         struct cfg80211_wowlan new_triggers = {};
9692         struct cfg80211_wowlan *ntrig;
9693         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9694         int err, i;
9695         bool prev_enabled = rdev->wiphy.wowlan_config;
9696         bool regular = false;
9697
9698         if (!wowlan)
9699                 return -EOPNOTSUPP;
9700
9701         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9702                 cfg80211_rdev_free_wowlan(rdev);
9703                 rdev->wiphy.wowlan_config = NULL;
9704                 goto set_wakeup;
9705         }
9706
9707         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9708                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9709                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9710                         nl80211_wowlan_policy);
9711         if (err)
9712                 return err;
9713
9714         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9715                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9716                         return -EINVAL;
9717                 new_triggers.any = true;
9718         }
9719
9720         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9721                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9722                         return -EINVAL;
9723                 new_triggers.disconnect = true;
9724                 regular = true;
9725         }
9726
9727         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9728                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9729                         return -EINVAL;
9730                 new_triggers.magic_pkt = true;
9731                 regular = true;
9732         }
9733
9734         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9735                 return -EINVAL;
9736
9737         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9738                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9739                         return -EINVAL;
9740                 new_triggers.gtk_rekey_failure = true;
9741                 regular = true;
9742         }
9743
9744         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9745                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9746                         return -EINVAL;
9747                 new_triggers.eap_identity_req = true;
9748                 regular = true;
9749         }
9750
9751         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9752                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9753                         return -EINVAL;
9754                 new_triggers.four_way_handshake = true;
9755                 regular = true;
9756         }
9757
9758         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9759                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9760                         return -EINVAL;
9761                 new_triggers.rfkill_release = true;
9762                 regular = true;
9763         }
9764
9765         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9766                 struct nlattr *pat;
9767                 int n_patterns = 0;
9768                 int rem, pat_len, mask_len, pkt_offset;
9769                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9770
9771                 regular = true;
9772
9773                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9774                                     rem)
9775                         n_patterns++;
9776                 if (n_patterns > wowlan->n_patterns)
9777                         return -EINVAL;
9778
9779                 new_triggers.patterns = kcalloc(n_patterns,
9780                                                 sizeof(new_triggers.patterns[0]),
9781                                                 GFP_KERNEL);
9782                 if (!new_triggers.patterns)
9783                         return -ENOMEM;
9784
9785                 new_triggers.n_patterns = n_patterns;
9786                 i = 0;
9787
9788                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9789                                     rem) {
9790                         u8 *mask_pat;
9791
9792                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9793                                   nla_len(pat), NULL);
9794                         err = -EINVAL;
9795                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9796                             !pat_tb[NL80211_PKTPAT_PATTERN])
9797                                 goto error;
9798                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9799                         mask_len = DIV_ROUND_UP(pat_len, 8);
9800                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9801                                 goto error;
9802                         if (pat_len > wowlan->pattern_max_len ||
9803                             pat_len < wowlan->pattern_min_len)
9804                                 goto error;
9805
9806                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9807                                 pkt_offset = 0;
9808                         else
9809                                 pkt_offset = nla_get_u32(
9810                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9811                         if (pkt_offset > wowlan->max_pkt_offset)
9812                                 goto error;
9813                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9814
9815                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9816                         if (!mask_pat) {
9817                                 err = -ENOMEM;
9818                                 goto error;
9819                         }
9820                         new_triggers.patterns[i].mask = mask_pat;
9821                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9822                                mask_len);
9823                         mask_pat += mask_len;
9824                         new_triggers.patterns[i].pattern = mask_pat;
9825                         new_triggers.patterns[i].pattern_len = pat_len;
9826                         memcpy(mask_pat,
9827                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9828                                pat_len);
9829                         i++;
9830                 }
9831         }
9832
9833         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9834                 regular = true;
9835                 err = nl80211_parse_wowlan_tcp(
9836                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9837                         &new_triggers);
9838                 if (err)
9839                         goto error;
9840         }
9841
9842         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9843                 regular = true;
9844                 err = nl80211_parse_wowlan_nd(
9845                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9846                         &new_triggers);
9847                 if (err)
9848                         goto error;
9849         }
9850
9851         /* The 'any' trigger means the device continues operating more or less
9852          * as in its normal operation mode and wakes up the host on most of the
9853          * normal interrupts (like packet RX, ...)
9854          * It therefore makes little sense to combine with the more constrained
9855          * wakeup trigger modes.
9856          */
9857         if (new_triggers.any && regular) {
9858                 err = -EINVAL;
9859                 goto error;
9860         }
9861
9862         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9863         if (!ntrig) {
9864                 err = -ENOMEM;
9865                 goto error;
9866         }
9867         cfg80211_rdev_free_wowlan(rdev);
9868         rdev->wiphy.wowlan_config = ntrig;
9869
9870  set_wakeup:
9871         if (rdev->ops->set_wakeup &&
9872             prev_enabled != !!rdev->wiphy.wowlan_config)
9873                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9874
9875         return 0;
9876  error:
9877         for (i = 0; i < new_triggers.n_patterns; i++)
9878                 kfree(new_triggers.patterns[i].mask);
9879         kfree(new_triggers.patterns);
9880         if (new_triggers.tcp && new_triggers.tcp->sock)
9881                 sock_release(new_triggers.tcp->sock);
9882         kfree(new_triggers.tcp);
9883         kfree(new_triggers.nd_config);
9884         return err;
9885 }
9886 #endif
9887
9888 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9889                                        struct cfg80211_registered_device *rdev)
9890 {
9891         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9892         int i, j, pat_len;
9893         struct cfg80211_coalesce_rules *rule;
9894
9895         if (!rdev->coalesce->n_rules)
9896                 return 0;
9897
9898         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9899         if (!nl_rules)
9900                 return -ENOBUFS;
9901
9902         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9903                 nl_rule = nla_nest_start(msg, i + 1);
9904                 if (!nl_rule)
9905                         return -ENOBUFS;
9906
9907                 rule = &rdev->coalesce->rules[i];
9908                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9909                                 rule->delay))
9910                         return -ENOBUFS;
9911
9912                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9913                                 rule->condition))
9914                         return -ENOBUFS;
9915
9916                 nl_pats = nla_nest_start(msg,
9917                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9918                 if (!nl_pats)
9919                         return -ENOBUFS;
9920
9921                 for (j = 0; j < rule->n_patterns; j++) {
9922                         nl_pat = nla_nest_start(msg, j + 1);
9923                         if (!nl_pat)
9924                                 return -ENOBUFS;
9925                         pat_len = rule->patterns[j].pattern_len;
9926                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9927                                     DIV_ROUND_UP(pat_len, 8),
9928                                     rule->patterns[j].mask) ||
9929                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9930                                     rule->patterns[j].pattern) ||
9931                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9932                                         rule->patterns[j].pkt_offset))
9933                                 return -ENOBUFS;
9934                         nla_nest_end(msg, nl_pat);
9935                 }
9936                 nla_nest_end(msg, nl_pats);
9937                 nla_nest_end(msg, nl_rule);
9938         }
9939         nla_nest_end(msg, nl_rules);
9940
9941         return 0;
9942 }
9943
9944 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9945 {
9946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9947         struct sk_buff *msg;
9948         void *hdr;
9949
9950         if (!rdev->wiphy.coalesce)
9951                 return -EOPNOTSUPP;
9952
9953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9954         if (!msg)
9955                 return -ENOMEM;
9956
9957         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9958                              NL80211_CMD_GET_COALESCE);
9959         if (!hdr)
9960                 goto nla_put_failure;
9961
9962         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9963                 goto nla_put_failure;
9964
9965         genlmsg_end(msg, hdr);
9966         return genlmsg_reply(msg, info);
9967
9968 nla_put_failure:
9969         nlmsg_free(msg);
9970         return -ENOBUFS;
9971 }
9972
9973 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9974 {
9975         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9976         int i, j;
9977         struct cfg80211_coalesce_rules *rule;
9978
9979         if (!coalesce)
9980                 return;
9981
9982         for (i = 0; i < coalesce->n_rules; i++) {
9983                 rule = &coalesce->rules[i];
9984                 for (j = 0; j < rule->n_patterns; j++)
9985                         kfree(rule->patterns[j].mask);
9986                 kfree(rule->patterns);
9987         }
9988         kfree(coalesce->rules);
9989         kfree(coalesce);
9990         rdev->coalesce = NULL;
9991 }
9992
9993 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9994                                        struct nlattr *rule,
9995                                        struct cfg80211_coalesce_rules *new_rule)
9996 {
9997         int err, i;
9998         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9999         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10000         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10001         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10002
10003         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
10004                         nla_len(rule), nl80211_coalesce_policy);
10005         if (err)
10006                 return err;
10007
10008         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10009                 new_rule->delay =
10010                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10011         if (new_rule->delay > coalesce->max_delay)
10012                 return -EINVAL;
10013
10014         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10015                 new_rule->condition =
10016                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10017         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10018             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10019                 return -EINVAL;
10020
10021         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10022                 return -EINVAL;
10023
10024         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10025                             rem)
10026                 n_patterns++;
10027         if (n_patterns > coalesce->n_patterns)
10028                 return -EINVAL;
10029
10030         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10031                                      GFP_KERNEL);
10032         if (!new_rule->patterns)
10033                 return -ENOMEM;
10034
10035         new_rule->n_patterns = n_patterns;
10036         i = 0;
10037
10038         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10039                             rem) {
10040                 u8 *mask_pat;
10041
10042                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10043                           nla_len(pat), NULL);
10044                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10045                     !pat_tb[NL80211_PKTPAT_PATTERN])
10046                         return -EINVAL;
10047                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10048                 mask_len = DIV_ROUND_UP(pat_len, 8);
10049                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10050                         return -EINVAL;
10051                 if (pat_len > coalesce->pattern_max_len ||
10052                     pat_len < coalesce->pattern_min_len)
10053                         return -EINVAL;
10054
10055                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10056                         pkt_offset = 0;
10057                 else
10058                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10059                 if (pkt_offset > coalesce->max_pkt_offset)
10060                         return -EINVAL;
10061                 new_rule->patterns[i].pkt_offset = pkt_offset;
10062
10063                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10064                 if (!mask_pat)
10065                         return -ENOMEM;
10066
10067                 new_rule->patterns[i].mask = mask_pat;
10068                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10069                        mask_len);
10070
10071                 mask_pat += mask_len;
10072                 new_rule->patterns[i].pattern = mask_pat;
10073                 new_rule->patterns[i].pattern_len = pat_len;
10074                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10075                        pat_len);
10076                 i++;
10077         }
10078
10079         return 0;
10080 }
10081
10082 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10083 {
10084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10085         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10086         struct cfg80211_coalesce new_coalesce = {};
10087         struct cfg80211_coalesce *n_coalesce;
10088         int err, rem_rule, n_rules = 0, i, j;
10089         struct nlattr *rule;
10090         struct cfg80211_coalesce_rules *tmp_rule;
10091
10092         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10093                 return -EOPNOTSUPP;
10094
10095         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10096                 cfg80211_rdev_free_coalesce(rdev);
10097                 rdev_set_coalesce(rdev, NULL);
10098                 return 0;
10099         }
10100
10101         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10102                             rem_rule)
10103                 n_rules++;
10104         if (n_rules > coalesce->n_rules)
10105                 return -EINVAL;
10106
10107         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10108                                      GFP_KERNEL);
10109         if (!new_coalesce.rules)
10110                 return -ENOMEM;
10111
10112         new_coalesce.n_rules = n_rules;
10113         i = 0;
10114
10115         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10116                             rem_rule) {
10117                 err = nl80211_parse_coalesce_rule(rdev, rule,
10118                                                   &new_coalesce.rules[i]);
10119                 if (err)
10120                         goto error;
10121
10122                 i++;
10123         }
10124
10125         err = rdev_set_coalesce(rdev, &new_coalesce);
10126         if (err)
10127                 goto error;
10128
10129         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10130         if (!n_coalesce) {
10131                 err = -ENOMEM;
10132                 goto error;
10133         }
10134         cfg80211_rdev_free_coalesce(rdev);
10135         rdev->coalesce = n_coalesce;
10136
10137         return 0;
10138 error:
10139         for (i = 0; i < new_coalesce.n_rules; i++) {
10140                 tmp_rule = &new_coalesce.rules[i];
10141                 for (j = 0; j < tmp_rule->n_patterns; j++)
10142                         kfree(tmp_rule->patterns[j].mask);
10143                 kfree(tmp_rule->patterns);
10144         }
10145         kfree(new_coalesce.rules);
10146
10147         return err;
10148 }
10149
10150 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10151 {
10152         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10153         struct net_device *dev = info->user_ptr[1];
10154         struct wireless_dev *wdev = dev->ieee80211_ptr;
10155         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10156         struct cfg80211_gtk_rekey_data rekey_data;
10157         int err;
10158
10159         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10160                 return -EINVAL;
10161
10162         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10163                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10164                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10165                         nl80211_rekey_policy);
10166         if (err)
10167                 return err;
10168
10169         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10170                 return -ERANGE;
10171         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10172                 return -ERANGE;
10173         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10174                 return -ERANGE;
10175
10176         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10177         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10178         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10179
10180         wdev_lock(wdev);
10181         if (!wdev->current_bss) {
10182                 err = -ENOTCONN;
10183                 goto out;
10184         }
10185
10186         if (!rdev->ops->set_rekey_data) {
10187                 err = -EOPNOTSUPP;
10188                 goto out;
10189         }
10190
10191         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10192  out:
10193         wdev_unlock(wdev);
10194         return err;
10195 }
10196
10197 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10198                                              struct genl_info *info)
10199 {
10200         struct net_device *dev = info->user_ptr[1];
10201         struct wireless_dev *wdev = dev->ieee80211_ptr;
10202
10203         if (wdev->iftype != NL80211_IFTYPE_AP &&
10204             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10205                 return -EINVAL;
10206
10207         if (wdev->ap_unexpected_nlportid)
10208                 return -EBUSY;
10209
10210         wdev->ap_unexpected_nlportid = info->snd_portid;
10211         return 0;
10212 }
10213
10214 static int nl80211_probe_client(struct sk_buff *skb,
10215                                 struct genl_info *info)
10216 {
10217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10218         struct net_device *dev = info->user_ptr[1];
10219         struct wireless_dev *wdev = dev->ieee80211_ptr;
10220         struct sk_buff *msg;
10221         void *hdr;
10222         const u8 *addr;
10223         u64 cookie;
10224         int err;
10225
10226         if (wdev->iftype != NL80211_IFTYPE_AP &&
10227             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10228                 return -EOPNOTSUPP;
10229
10230         if (!info->attrs[NL80211_ATTR_MAC])
10231                 return -EINVAL;
10232
10233         if (!rdev->ops->probe_client)
10234                 return -EOPNOTSUPP;
10235
10236         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10237         if (!msg)
10238                 return -ENOMEM;
10239
10240         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10241                              NL80211_CMD_PROBE_CLIENT);
10242         if (!hdr) {
10243                 err = -ENOBUFS;
10244                 goto free_msg;
10245         }
10246
10247         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10248
10249         err = rdev_probe_client(rdev, dev, addr, &cookie);
10250         if (err)
10251                 goto free_msg;
10252
10253         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10254                               NL80211_ATTR_PAD))
10255                 goto nla_put_failure;
10256
10257         genlmsg_end(msg, hdr);
10258
10259         return genlmsg_reply(msg, info);
10260
10261  nla_put_failure:
10262         err = -ENOBUFS;
10263  free_msg:
10264         nlmsg_free(msg);
10265         return err;
10266 }
10267
10268 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10269 {
10270         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10271         struct cfg80211_beacon_registration *reg, *nreg;
10272         int rv;
10273
10274         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10275                 return -EOPNOTSUPP;
10276
10277         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10278         if (!nreg)
10279                 return -ENOMEM;
10280
10281         /* First, check if already registered. */
10282         spin_lock_bh(&rdev->beacon_registrations_lock);
10283         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10284                 if (reg->nlportid == info->snd_portid) {
10285                         rv = -EALREADY;
10286                         goto out_err;
10287                 }
10288         }
10289         /* Add it to the list */
10290         nreg->nlportid = info->snd_portid;
10291         list_add(&nreg->list, &rdev->beacon_registrations);
10292
10293         spin_unlock_bh(&rdev->beacon_registrations_lock);
10294
10295         return 0;
10296 out_err:
10297         spin_unlock_bh(&rdev->beacon_registrations_lock);
10298         kfree(nreg);
10299         return rv;
10300 }
10301
10302 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10303 {
10304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10305         struct wireless_dev *wdev = info->user_ptr[1];
10306         int err;
10307
10308         if (!rdev->ops->start_p2p_device)
10309                 return -EOPNOTSUPP;
10310
10311         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10312                 return -EOPNOTSUPP;
10313
10314         if (wdev->p2p_started)
10315                 return 0;
10316
10317         if (rfkill_blocked(rdev->rfkill))
10318                 return -ERFKILL;
10319
10320         err = rdev_start_p2p_device(rdev, wdev);
10321         if (err)
10322                 return err;
10323
10324         wdev->p2p_started = true;
10325         rdev->opencount++;
10326
10327         return 0;
10328 }
10329
10330 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10331 {
10332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10333         struct wireless_dev *wdev = info->user_ptr[1];
10334
10335         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10336                 return -EOPNOTSUPP;
10337
10338         if (!rdev->ops->stop_p2p_device)
10339                 return -EOPNOTSUPP;
10340
10341         cfg80211_stop_p2p_device(rdev, wdev);
10342
10343         return 0;
10344 }
10345
10346 static int nl80211_get_protocol_features(struct sk_buff *skb,
10347                                          struct genl_info *info)
10348 {
10349         void *hdr;
10350         struct sk_buff *msg;
10351
10352         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10353         if (!msg)
10354                 return -ENOMEM;
10355
10356         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10357                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10358         if (!hdr)
10359                 goto nla_put_failure;
10360
10361         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10362                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10363                 goto nla_put_failure;
10364
10365         genlmsg_end(msg, hdr);
10366         return genlmsg_reply(msg, info);
10367
10368  nla_put_failure:
10369         kfree_skb(msg);
10370         return -ENOBUFS;
10371 }
10372
10373 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10374 {
10375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10376         struct cfg80211_update_ft_ies_params ft_params;
10377         struct net_device *dev = info->user_ptr[1];
10378
10379         if (!rdev->ops->update_ft_ies)
10380                 return -EOPNOTSUPP;
10381
10382         if (!info->attrs[NL80211_ATTR_MDID] ||
10383             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10384                 return -EINVAL;
10385
10386         memset(&ft_params, 0, sizeof(ft_params));
10387         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10388         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10389         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10390
10391         return rdev_update_ft_ies(rdev, dev, &ft_params);
10392 }
10393
10394 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10395                                        struct genl_info *info)
10396 {
10397         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10398         struct wireless_dev *wdev = info->user_ptr[1];
10399         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10400         u16 duration;
10401         int ret;
10402
10403         if (!rdev->ops->crit_proto_start)
10404                 return -EOPNOTSUPP;
10405
10406         if (WARN_ON(!rdev->ops->crit_proto_stop))
10407                 return -EINVAL;
10408
10409         if (rdev->crit_proto_nlportid)
10410                 return -EBUSY;
10411
10412         /* determine protocol if provided */
10413         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10414                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10415
10416         if (proto >= NUM_NL80211_CRIT_PROTO)
10417                 return -EINVAL;
10418
10419         /* timeout must be provided */
10420         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10421                 return -EINVAL;
10422
10423         duration =
10424                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10425
10426         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10427                 return -ERANGE;
10428
10429         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10430         if (!ret)
10431                 rdev->crit_proto_nlportid = info->snd_portid;
10432
10433         return ret;
10434 }
10435
10436 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10437                                       struct genl_info *info)
10438 {
10439         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10440         struct wireless_dev *wdev = info->user_ptr[1];
10441
10442         if (!rdev->ops->crit_proto_stop)
10443                 return -EOPNOTSUPP;
10444
10445         if (rdev->crit_proto_nlportid) {
10446                 rdev->crit_proto_nlportid = 0;
10447                 rdev_crit_proto_stop(rdev, wdev);
10448         }
10449         return 0;
10450 }
10451
10452 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10453 {
10454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10455         struct wireless_dev *wdev =
10456                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10457         int i, err;
10458         u32 vid, subcmd;
10459
10460         if (!rdev->wiphy.vendor_commands)
10461                 return -EOPNOTSUPP;
10462
10463         if (IS_ERR(wdev)) {
10464                 err = PTR_ERR(wdev);
10465                 if (err != -EINVAL)
10466                         return err;
10467                 wdev = NULL;
10468         } else if (wdev->wiphy != &rdev->wiphy) {
10469                 return -EINVAL;
10470         }
10471
10472         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10473             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10474                 return -EINVAL;
10475
10476         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10477         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10478         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10479                 const struct wiphy_vendor_command *vcmd;
10480                 void *data = NULL;
10481                 int len = 0;
10482
10483                 vcmd = &rdev->wiphy.vendor_commands[i];
10484
10485                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10486                         continue;
10487
10488                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10489                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10490                         if (!wdev)
10491                                 return -EINVAL;
10492                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10493                             !wdev->netdev)
10494                                 return -EINVAL;
10495
10496                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10497                                 if (wdev->netdev &&
10498                                     !netif_running(wdev->netdev))
10499                                         return -ENETDOWN;
10500                                 if (!wdev->netdev && !wdev->p2p_started)
10501                                         return -ENETDOWN;
10502                         }
10503
10504                         if (!vcmd->doit)
10505                                 return -EOPNOTSUPP;
10506                 } else {
10507                         wdev = NULL;
10508                 }
10509
10510                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10511                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10512                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10513                 }
10514
10515                 rdev->cur_cmd_info = info;
10516                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10517                                                           data, len);
10518                 rdev->cur_cmd_info = NULL;
10519                 return err;
10520         }
10521
10522         return -EOPNOTSUPP;
10523 }
10524
10525 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10526                                        struct netlink_callback *cb,
10527                                        struct cfg80211_registered_device **rdev,
10528                                        struct wireless_dev **wdev)
10529 {
10530         u32 vid, subcmd;
10531         unsigned int i;
10532         int vcmd_idx = -1;
10533         int err;
10534         void *data = NULL;
10535         unsigned int data_len = 0;
10536
10537         rtnl_lock();
10538
10539         if (cb->args[0]) {
10540                 /* subtract the 1 again here */
10541                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10542                 struct wireless_dev *tmp;
10543
10544                 if (!wiphy) {
10545                         err = -ENODEV;
10546                         goto out_unlock;
10547                 }
10548                 *rdev = wiphy_to_rdev(wiphy);
10549                 *wdev = NULL;
10550
10551                 if (cb->args[1]) {
10552                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10553                                 if (tmp->identifier == cb->args[1] - 1) {
10554                                         *wdev = tmp;
10555                                         break;
10556                                 }
10557                         }
10558                 }
10559
10560                 /* keep rtnl locked in successful case */
10561                 return 0;
10562         }
10563
10564         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10565                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10566                           nl80211_policy);
10567         if (err)
10568                 goto out_unlock;
10569
10570         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10571             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10572                 err = -EINVAL;
10573                 goto out_unlock;
10574         }
10575
10576         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10577                                            nl80211_fam.attrbuf);
10578         if (IS_ERR(*wdev))
10579                 *wdev = NULL;
10580
10581         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10582                                            nl80211_fam.attrbuf);
10583         if (IS_ERR(*rdev)) {
10584                 err = PTR_ERR(*rdev);
10585                 goto out_unlock;
10586         }
10587
10588         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10589         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10590
10591         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10592                 const struct wiphy_vendor_command *vcmd;
10593
10594                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10595
10596                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10597                         continue;
10598
10599                 if (!vcmd->dumpit) {
10600                         err = -EOPNOTSUPP;
10601                         goto out_unlock;
10602                 }
10603
10604                 vcmd_idx = i;
10605                 break;
10606         }
10607
10608         if (vcmd_idx < 0) {
10609                 err = -EOPNOTSUPP;
10610                 goto out_unlock;
10611         }
10612
10613         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10614                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10615                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10616         }
10617
10618         /* 0 is the first index - add 1 to parse only once */
10619         cb->args[0] = (*rdev)->wiphy_idx + 1;
10620         /* add 1 to know if it was NULL */
10621         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10622         cb->args[2] = vcmd_idx;
10623         cb->args[3] = (unsigned long)data;
10624         cb->args[4] = data_len;
10625
10626         /* keep rtnl locked in successful case */
10627         return 0;
10628  out_unlock:
10629         rtnl_unlock();
10630         return err;
10631 }
10632
10633 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10634                                    struct netlink_callback *cb)
10635 {
10636         struct cfg80211_registered_device *rdev;
10637         struct wireless_dev *wdev;
10638         unsigned int vcmd_idx;
10639         const struct wiphy_vendor_command *vcmd;
10640         void *data;
10641         int data_len;
10642         int err;
10643         struct nlattr *vendor_data;
10644
10645         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10646         if (err)
10647                 return err;
10648
10649         vcmd_idx = cb->args[2];
10650         data = (void *)cb->args[3];
10651         data_len = cb->args[4];
10652         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10653
10654         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10655                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10656                 if (!wdev)
10657                         return -EINVAL;
10658                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10659                     !wdev->netdev)
10660                         return -EINVAL;
10661
10662                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10663                         if (wdev->netdev &&
10664                             !netif_running(wdev->netdev))
10665                                 return -ENETDOWN;
10666                         if (!wdev->netdev && !wdev->p2p_started)
10667                                 return -ENETDOWN;
10668                 }
10669         }
10670
10671         while (1) {
10672                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10673                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10674                                            NL80211_CMD_VENDOR);
10675                 if (!hdr)
10676                         break;
10677
10678                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10679                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10680                                                wdev_id(wdev),
10681                                                NL80211_ATTR_PAD))) {
10682                         genlmsg_cancel(skb, hdr);
10683                         break;
10684                 }
10685
10686                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10687                 if (!vendor_data) {
10688                         genlmsg_cancel(skb, hdr);
10689                         break;
10690                 }
10691
10692                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10693                                    (unsigned long *)&cb->args[5]);
10694                 nla_nest_end(skb, vendor_data);
10695
10696                 if (err == -ENOBUFS || err == -ENOENT) {
10697                         genlmsg_cancel(skb, hdr);
10698                         break;
10699                 } else if (err) {
10700                         genlmsg_cancel(skb, hdr);
10701                         goto out;
10702                 }
10703
10704                 genlmsg_end(skb, hdr);
10705         }
10706
10707         err = skb->len;
10708  out:
10709         rtnl_unlock();
10710         return err;
10711 }
10712
10713 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10714                                            enum nl80211_commands cmd,
10715                                            enum nl80211_attrs attr,
10716                                            int approxlen)
10717 {
10718         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10719
10720         if (WARN_ON(!rdev->cur_cmd_info))
10721                 return NULL;
10722
10723         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10724                                            rdev->cur_cmd_info->snd_portid,
10725                                            rdev->cur_cmd_info->snd_seq,
10726                                            cmd, attr, NULL, GFP_KERNEL);
10727 }
10728 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10729
10730 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10731 {
10732         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10733         void *hdr = ((void **)skb->cb)[1];
10734         struct nlattr *data = ((void **)skb->cb)[2];
10735
10736         /* clear CB data for netlink core to own from now on */
10737         memset(skb->cb, 0, sizeof(skb->cb));
10738
10739         if (WARN_ON(!rdev->cur_cmd_info)) {
10740                 kfree_skb(skb);
10741                 return -EINVAL;
10742         }
10743
10744         nla_nest_end(skb, data);
10745         genlmsg_end(skb, hdr);
10746         return genlmsg_reply(skb, rdev->cur_cmd_info);
10747 }
10748 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10749
10750 static int nl80211_set_qos_map(struct sk_buff *skb,
10751                                struct genl_info *info)
10752 {
10753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10754         struct cfg80211_qos_map *qos_map = NULL;
10755         struct net_device *dev = info->user_ptr[1];
10756         u8 *pos, len, num_des, des_len, des;
10757         int ret;
10758
10759         if (!rdev->ops->set_qos_map)
10760                 return -EOPNOTSUPP;
10761
10762         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10763                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10764                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10765
10766                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10767                     len > IEEE80211_QOS_MAP_LEN_MAX)
10768                         return -EINVAL;
10769
10770                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10771                 if (!qos_map)
10772                         return -ENOMEM;
10773
10774                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10775                 if (num_des) {
10776                         des_len = num_des *
10777                                 sizeof(struct cfg80211_dscp_exception);
10778                         memcpy(qos_map->dscp_exception, pos, des_len);
10779                         qos_map->num_des = num_des;
10780                         for (des = 0; des < num_des; des++) {
10781                                 if (qos_map->dscp_exception[des].up > 7) {
10782                                         kfree(qos_map);
10783                                         return -EINVAL;
10784                                 }
10785                         }
10786                         pos += des_len;
10787                 }
10788                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10789         }
10790
10791         wdev_lock(dev->ieee80211_ptr);
10792         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10793         if (!ret)
10794                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10795         wdev_unlock(dev->ieee80211_ptr);
10796
10797         kfree(qos_map);
10798         return ret;
10799 }
10800
10801 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10802 {
10803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10804         struct net_device *dev = info->user_ptr[1];
10805         struct wireless_dev *wdev = dev->ieee80211_ptr;
10806         const u8 *peer;
10807         u8 tsid, up;
10808         u16 admitted_time = 0;
10809         int err;
10810
10811         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10812                 return -EOPNOTSUPP;
10813
10814         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10815             !info->attrs[NL80211_ATTR_USER_PRIO])
10816                 return -EINVAL;
10817
10818         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10819         if (tsid >= IEEE80211_NUM_TIDS)
10820                 return -EINVAL;
10821
10822         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10823         if (up >= IEEE80211_NUM_UPS)
10824                 return -EINVAL;
10825
10826         /* WMM uses TIDs 0-7 even for TSPEC */
10827         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10828                 /* TODO: handle 802.11 TSPEC/admission control
10829                  * need more attributes for that (e.g. BA session requirement);
10830                  * change the WMM adminssion test above to allow both then
10831                  */
10832                 return -EINVAL;
10833         }
10834
10835         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10836
10837         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10838                 admitted_time =
10839                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10840                 if (!admitted_time)
10841                         return -EINVAL;
10842         }
10843
10844         wdev_lock(wdev);
10845         switch (wdev->iftype) {
10846         case NL80211_IFTYPE_STATION:
10847         case NL80211_IFTYPE_P2P_CLIENT:
10848                 if (wdev->current_bss)
10849                         break;
10850                 err = -ENOTCONN;
10851                 goto out;
10852         default:
10853                 err = -EOPNOTSUPP;
10854                 goto out;
10855         }
10856
10857         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10858
10859  out:
10860         wdev_unlock(wdev);
10861         return err;
10862 }
10863
10864 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10865 {
10866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10867         struct net_device *dev = info->user_ptr[1];
10868         struct wireless_dev *wdev = dev->ieee80211_ptr;
10869         const u8 *peer;
10870         u8 tsid;
10871         int err;
10872
10873         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10874                 return -EINVAL;
10875
10876         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10877         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10878
10879         wdev_lock(wdev);
10880         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10881         wdev_unlock(wdev);
10882
10883         return err;
10884 }
10885
10886 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10887                                        struct genl_info *info)
10888 {
10889         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10890         struct net_device *dev = info->user_ptr[1];
10891         struct wireless_dev *wdev = dev->ieee80211_ptr;
10892         struct cfg80211_chan_def chandef = {};
10893         const u8 *addr;
10894         u8 oper_class;
10895         int err;
10896
10897         if (!rdev->ops->tdls_channel_switch ||
10898             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10899                 return -EOPNOTSUPP;
10900
10901         switch (dev->ieee80211_ptr->iftype) {
10902         case NL80211_IFTYPE_STATION:
10903         case NL80211_IFTYPE_P2P_CLIENT:
10904                 break;
10905         default:
10906                 return -EOPNOTSUPP;
10907         }
10908
10909         if (!info->attrs[NL80211_ATTR_MAC] ||
10910             !info->attrs[NL80211_ATTR_OPER_CLASS])
10911                 return -EINVAL;
10912
10913         err = nl80211_parse_chandef(rdev, info, &chandef);
10914         if (err)
10915                 return err;
10916
10917         /*
10918          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10919          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10920          * specification is not defined for them.
10921          */
10922         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10923             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10924             chandef.width != NL80211_CHAN_WIDTH_20)
10925                 return -EINVAL;
10926
10927         /* we will be active on the TDLS link */
10928         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10929                                            wdev->iftype))
10930                 return -EINVAL;
10931
10932         /* don't allow switching to DFS channels */
10933         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10934                 return -EINVAL;
10935
10936         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10937         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10938
10939         wdev_lock(wdev);
10940         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10941         wdev_unlock(wdev);
10942
10943         return err;
10944 }
10945
10946 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10947                                               struct genl_info *info)
10948 {
10949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10950         struct net_device *dev = info->user_ptr[1];
10951         struct wireless_dev *wdev = dev->ieee80211_ptr;
10952         const u8 *addr;
10953
10954         if (!rdev->ops->tdls_channel_switch ||
10955             !rdev->ops->tdls_cancel_channel_switch ||
10956             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10957                 return -EOPNOTSUPP;
10958
10959         switch (dev->ieee80211_ptr->iftype) {
10960         case NL80211_IFTYPE_STATION:
10961         case NL80211_IFTYPE_P2P_CLIENT:
10962                 break;
10963         default:
10964                 return -EOPNOTSUPP;
10965         }
10966
10967         if (!info->attrs[NL80211_ATTR_MAC])
10968                 return -EINVAL;
10969
10970         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10971
10972         wdev_lock(wdev);
10973         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10974         wdev_unlock(wdev);
10975
10976         return 0;
10977 }
10978
10979 #define NL80211_FLAG_NEED_WIPHY         0x01
10980 #define NL80211_FLAG_NEED_NETDEV        0x02
10981 #define NL80211_FLAG_NEED_RTNL          0x04
10982 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10983 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10984                                          NL80211_FLAG_CHECK_NETDEV_UP)
10985 #define NL80211_FLAG_NEED_WDEV          0x10
10986 /* If a netdev is associated, it must be UP, P2P must be started */
10987 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10988                                          NL80211_FLAG_CHECK_NETDEV_UP)
10989 #define NL80211_FLAG_CLEAR_SKB          0x20
10990
10991 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10992                             struct genl_info *info)
10993 {
10994         struct cfg80211_registered_device *rdev;
10995         struct wireless_dev *wdev;
10996         struct net_device *dev;
10997         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10998
10999         if (rtnl)
11000                 rtnl_lock();
11001
11002         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11003                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11004                 if (IS_ERR(rdev)) {
11005                         if (rtnl)
11006                                 rtnl_unlock();
11007                         return PTR_ERR(rdev);
11008                 }
11009                 info->user_ptr[0] = rdev;
11010         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11011                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11012                 ASSERT_RTNL();
11013
11014                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11015                                                   info->attrs);
11016                 if (IS_ERR(wdev)) {
11017                         if (rtnl)
11018                                 rtnl_unlock();
11019                         return PTR_ERR(wdev);
11020                 }
11021
11022                 dev = wdev->netdev;
11023                 rdev = wiphy_to_rdev(wdev->wiphy);
11024
11025                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11026                         if (!dev) {
11027                                 if (rtnl)
11028                                         rtnl_unlock();
11029                                 return -EINVAL;
11030                         }
11031
11032                         info->user_ptr[1] = dev;
11033                 } else {
11034                         info->user_ptr[1] = wdev;
11035                 }
11036
11037                 if (dev) {
11038                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11039                             !netif_running(dev)) {
11040                                 if (rtnl)
11041                                         rtnl_unlock();
11042                                 return -ENETDOWN;
11043                         }
11044
11045                         dev_hold(dev);
11046                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11047                         if (!wdev->p2p_started) {
11048                                 if (rtnl)
11049                                         rtnl_unlock();
11050                                 return -ENETDOWN;
11051                         }
11052                 }
11053
11054                 info->user_ptr[0] = rdev;
11055         }
11056
11057         return 0;
11058 }
11059
11060 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11061                               struct genl_info *info)
11062 {
11063         if (info->user_ptr[1]) {
11064                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11065                         struct wireless_dev *wdev = info->user_ptr[1];
11066
11067                         if (wdev->netdev)
11068                                 dev_put(wdev->netdev);
11069                 } else {
11070                         dev_put(info->user_ptr[1]);
11071                 }
11072         }
11073
11074         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11075                 rtnl_unlock();
11076
11077         /* If needed, clear the netlink message payload from the SKB
11078          * as it might contain key data that shouldn't stick around on
11079          * the heap after the SKB is freed. The netlink message header
11080          * is still needed for further processing, so leave it intact.
11081          */
11082         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11083                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11084
11085                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11086         }
11087 }
11088
11089 static const struct genl_ops nl80211_ops[] = {
11090         {
11091                 .cmd = NL80211_CMD_GET_WIPHY,
11092                 .doit = nl80211_get_wiphy,
11093                 .dumpit = nl80211_dump_wiphy,
11094                 .done = nl80211_dump_wiphy_done,
11095                 .policy = nl80211_policy,
11096                 /* can be retrieved by unprivileged users */
11097                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11098                                   NL80211_FLAG_NEED_RTNL,
11099         },
11100         {
11101                 .cmd = NL80211_CMD_SET_WIPHY,
11102                 .doit = nl80211_set_wiphy,
11103                 .policy = nl80211_policy,
11104                 .flags = GENL_UNS_ADMIN_PERM,
11105                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11106         },
11107         {
11108                 .cmd = NL80211_CMD_GET_INTERFACE,
11109                 .doit = nl80211_get_interface,
11110                 .dumpit = nl80211_dump_interface,
11111                 .policy = nl80211_policy,
11112                 /* can be retrieved by unprivileged users */
11113                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11114                                   NL80211_FLAG_NEED_RTNL,
11115         },
11116         {
11117                 .cmd = NL80211_CMD_SET_INTERFACE,
11118                 .doit = nl80211_set_interface,
11119                 .policy = nl80211_policy,
11120                 .flags = GENL_UNS_ADMIN_PERM,
11121                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11122                                   NL80211_FLAG_NEED_RTNL,
11123         },
11124         {
11125                 .cmd = NL80211_CMD_NEW_INTERFACE,
11126                 .doit = nl80211_new_interface,
11127                 .policy = nl80211_policy,
11128                 .flags = GENL_UNS_ADMIN_PERM,
11129                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11130                                   NL80211_FLAG_NEED_RTNL,
11131         },
11132         {
11133                 .cmd = NL80211_CMD_DEL_INTERFACE,
11134                 .doit = nl80211_del_interface,
11135                 .policy = nl80211_policy,
11136                 .flags = GENL_UNS_ADMIN_PERM,
11137                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11138                                   NL80211_FLAG_NEED_RTNL,
11139         },
11140         {
11141                 .cmd = NL80211_CMD_GET_KEY,
11142                 .doit = nl80211_get_key,
11143                 .policy = nl80211_policy,
11144                 .flags = GENL_UNS_ADMIN_PERM,
11145                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11146                                   NL80211_FLAG_NEED_RTNL,
11147         },
11148         {
11149                 .cmd = NL80211_CMD_SET_KEY,
11150                 .doit = nl80211_set_key,
11151                 .policy = nl80211_policy,
11152                 .flags = GENL_UNS_ADMIN_PERM,
11153                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11154                                   NL80211_FLAG_NEED_RTNL |
11155                                   NL80211_FLAG_CLEAR_SKB,
11156         },
11157         {
11158                 .cmd = NL80211_CMD_NEW_KEY,
11159                 .doit = nl80211_new_key,
11160                 .policy = nl80211_policy,
11161                 .flags = GENL_UNS_ADMIN_PERM,
11162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11163                                   NL80211_FLAG_NEED_RTNL |
11164                                   NL80211_FLAG_CLEAR_SKB,
11165         },
11166         {
11167                 .cmd = NL80211_CMD_DEL_KEY,
11168                 .doit = nl80211_del_key,
11169                 .policy = nl80211_policy,
11170                 .flags = GENL_UNS_ADMIN_PERM,
11171                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11172                                   NL80211_FLAG_NEED_RTNL,
11173         },
11174         {
11175                 .cmd = NL80211_CMD_SET_BEACON,
11176                 .policy = nl80211_policy,
11177                 .flags = GENL_UNS_ADMIN_PERM,
11178                 .doit = nl80211_set_beacon,
11179                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11180                                   NL80211_FLAG_NEED_RTNL,
11181         },
11182         {
11183                 .cmd = NL80211_CMD_START_AP,
11184                 .policy = nl80211_policy,
11185                 .flags = GENL_UNS_ADMIN_PERM,
11186                 .doit = nl80211_start_ap,
11187                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11188                                   NL80211_FLAG_NEED_RTNL,
11189         },
11190         {
11191                 .cmd = NL80211_CMD_STOP_AP,
11192                 .policy = nl80211_policy,
11193                 .flags = GENL_UNS_ADMIN_PERM,
11194                 .doit = nl80211_stop_ap,
11195                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11196                                   NL80211_FLAG_NEED_RTNL,
11197         },
11198         {
11199                 .cmd = NL80211_CMD_GET_STATION,
11200                 .doit = nl80211_get_station,
11201                 .dumpit = nl80211_dump_station,
11202                 .policy = nl80211_policy,
11203                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11204                                   NL80211_FLAG_NEED_RTNL,
11205         },
11206         {
11207                 .cmd = NL80211_CMD_SET_STATION,
11208                 .doit = nl80211_set_station,
11209                 .policy = nl80211_policy,
11210                 .flags = GENL_UNS_ADMIN_PERM,
11211                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11212                                   NL80211_FLAG_NEED_RTNL,
11213         },
11214         {
11215                 .cmd = NL80211_CMD_NEW_STATION,
11216                 .doit = nl80211_new_station,
11217                 .policy = nl80211_policy,
11218                 .flags = GENL_UNS_ADMIN_PERM,
11219                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11220                                   NL80211_FLAG_NEED_RTNL,
11221         },
11222         {
11223                 .cmd = NL80211_CMD_DEL_STATION,
11224                 .doit = nl80211_del_station,
11225                 .policy = nl80211_policy,
11226                 .flags = GENL_UNS_ADMIN_PERM,
11227                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11228                                   NL80211_FLAG_NEED_RTNL,
11229         },
11230         {
11231                 .cmd = NL80211_CMD_GET_MPATH,
11232                 .doit = nl80211_get_mpath,
11233                 .dumpit = nl80211_dump_mpath,
11234                 .policy = nl80211_policy,
11235                 .flags = GENL_UNS_ADMIN_PERM,
11236                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11237                                   NL80211_FLAG_NEED_RTNL,
11238         },
11239         {
11240                 .cmd = NL80211_CMD_GET_MPP,
11241                 .doit = nl80211_get_mpp,
11242                 .dumpit = nl80211_dump_mpp,
11243                 .policy = nl80211_policy,
11244                 .flags = GENL_UNS_ADMIN_PERM,
11245                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11246                                   NL80211_FLAG_NEED_RTNL,
11247         },
11248         {
11249                 .cmd = NL80211_CMD_SET_MPATH,
11250                 .doit = nl80211_set_mpath,
11251                 .policy = nl80211_policy,
11252                 .flags = GENL_UNS_ADMIN_PERM,
11253                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11254                                   NL80211_FLAG_NEED_RTNL,
11255         },
11256         {
11257                 .cmd = NL80211_CMD_NEW_MPATH,
11258                 .doit = nl80211_new_mpath,
11259                 .policy = nl80211_policy,
11260                 .flags = GENL_UNS_ADMIN_PERM,
11261                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11262                                   NL80211_FLAG_NEED_RTNL,
11263         },
11264         {
11265                 .cmd = NL80211_CMD_DEL_MPATH,
11266                 .doit = nl80211_del_mpath,
11267                 .policy = nl80211_policy,
11268                 .flags = GENL_UNS_ADMIN_PERM,
11269                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11270                                   NL80211_FLAG_NEED_RTNL,
11271         },
11272         {
11273                 .cmd = NL80211_CMD_SET_BSS,
11274                 .doit = nl80211_set_bss,
11275                 .policy = nl80211_policy,
11276                 .flags = GENL_UNS_ADMIN_PERM,
11277                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11278                                   NL80211_FLAG_NEED_RTNL,
11279         },
11280         {
11281                 .cmd = NL80211_CMD_GET_REG,
11282                 .doit = nl80211_get_reg_do,
11283                 .dumpit = nl80211_get_reg_dump,
11284                 .policy = nl80211_policy,
11285                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11286                 /* can be retrieved by unprivileged users */
11287         },
11288 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11289         {
11290                 .cmd = NL80211_CMD_SET_REG,
11291                 .doit = nl80211_set_reg,
11292                 .policy = nl80211_policy,
11293                 .flags = GENL_ADMIN_PERM,
11294                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11295         },
11296 #endif
11297         {
11298                 .cmd = NL80211_CMD_REQ_SET_REG,
11299                 .doit = nl80211_req_set_reg,
11300                 .policy = nl80211_policy,
11301                 .flags = GENL_ADMIN_PERM,
11302         },
11303         {
11304                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11305                 .doit = nl80211_get_mesh_config,
11306                 .policy = nl80211_policy,
11307                 /* can be retrieved by unprivileged users */
11308                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11309                                   NL80211_FLAG_NEED_RTNL,
11310         },
11311         {
11312                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11313                 .doit = nl80211_update_mesh_config,
11314                 .policy = nl80211_policy,
11315                 .flags = GENL_UNS_ADMIN_PERM,
11316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11317                                   NL80211_FLAG_NEED_RTNL,
11318         },
11319         {
11320                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11321                 .doit = nl80211_trigger_scan,
11322                 .policy = nl80211_policy,
11323                 .flags = GENL_UNS_ADMIN_PERM,
11324                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11325                                   NL80211_FLAG_NEED_RTNL,
11326         },
11327         {
11328                 .cmd = NL80211_CMD_ABORT_SCAN,
11329                 .doit = nl80211_abort_scan,
11330                 .policy = nl80211_policy,
11331                 .flags = GENL_UNS_ADMIN_PERM,
11332                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11333                                   NL80211_FLAG_NEED_RTNL,
11334         },
11335         {
11336                 .cmd = NL80211_CMD_GET_SCAN,
11337                 .policy = nl80211_policy,
11338                 .dumpit = nl80211_dump_scan,
11339         },
11340         {
11341                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11342                 .doit = nl80211_start_sched_scan,
11343                 .policy = nl80211_policy,
11344                 .flags = GENL_UNS_ADMIN_PERM,
11345                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11346                                   NL80211_FLAG_NEED_RTNL,
11347         },
11348         {
11349                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11350                 .doit = nl80211_stop_sched_scan,
11351                 .policy = nl80211_policy,
11352                 .flags = GENL_UNS_ADMIN_PERM,
11353                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11354                                   NL80211_FLAG_NEED_RTNL,
11355         },
11356         {
11357                 .cmd = NL80211_CMD_AUTHENTICATE,
11358                 .doit = nl80211_authenticate,
11359                 .policy = nl80211_policy,
11360                 .flags = GENL_UNS_ADMIN_PERM,
11361                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11362                                   NL80211_FLAG_NEED_RTNL |
11363                                   NL80211_FLAG_CLEAR_SKB,
11364         },
11365         {
11366                 .cmd = NL80211_CMD_ASSOCIATE,
11367                 .doit = nl80211_associate,
11368                 .policy = nl80211_policy,
11369                 .flags = GENL_UNS_ADMIN_PERM,
11370                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11371                                   NL80211_FLAG_NEED_RTNL,
11372         },
11373         {
11374                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11375                 .doit = nl80211_deauthenticate,
11376                 .policy = nl80211_policy,
11377                 .flags = GENL_UNS_ADMIN_PERM,
11378                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11379                                   NL80211_FLAG_NEED_RTNL,
11380         },
11381         {
11382                 .cmd = NL80211_CMD_DISASSOCIATE,
11383                 .doit = nl80211_disassociate,
11384                 .policy = nl80211_policy,
11385                 .flags = GENL_UNS_ADMIN_PERM,
11386                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11387                                   NL80211_FLAG_NEED_RTNL,
11388         },
11389         {
11390                 .cmd = NL80211_CMD_JOIN_IBSS,
11391                 .doit = nl80211_join_ibss,
11392                 .policy = nl80211_policy,
11393                 .flags = GENL_UNS_ADMIN_PERM,
11394                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11395                                   NL80211_FLAG_NEED_RTNL,
11396         },
11397         {
11398                 .cmd = NL80211_CMD_LEAVE_IBSS,
11399                 .doit = nl80211_leave_ibss,
11400                 .policy = nl80211_policy,
11401                 .flags = GENL_UNS_ADMIN_PERM,
11402                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11403                                   NL80211_FLAG_NEED_RTNL,
11404         },
11405 #ifdef CONFIG_NL80211_TESTMODE
11406         {
11407                 .cmd = NL80211_CMD_TESTMODE,
11408                 .doit = nl80211_testmode_do,
11409                 .dumpit = nl80211_testmode_dump,
11410                 .policy = nl80211_policy,
11411                 .flags = GENL_UNS_ADMIN_PERM,
11412                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11413                                   NL80211_FLAG_NEED_RTNL,
11414         },
11415 #endif
11416         {
11417                 .cmd = NL80211_CMD_CONNECT,
11418                 .doit = nl80211_connect,
11419                 .policy = nl80211_policy,
11420                 .flags = GENL_UNS_ADMIN_PERM,
11421                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11422                                   NL80211_FLAG_NEED_RTNL,
11423         },
11424         {
11425                 .cmd = NL80211_CMD_DISCONNECT,
11426                 .doit = nl80211_disconnect,
11427                 .policy = nl80211_policy,
11428                 .flags = GENL_UNS_ADMIN_PERM,
11429                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11430                                   NL80211_FLAG_NEED_RTNL,
11431         },
11432         {
11433                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11434                 .doit = nl80211_wiphy_netns,
11435                 .policy = nl80211_policy,
11436                 .flags = GENL_UNS_ADMIN_PERM,
11437                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11438                                   NL80211_FLAG_NEED_RTNL,
11439         },
11440         {
11441                 .cmd = NL80211_CMD_GET_SURVEY,
11442                 .policy = nl80211_policy,
11443                 .dumpit = nl80211_dump_survey,
11444         },
11445         {
11446                 .cmd = NL80211_CMD_SET_PMKSA,
11447                 .doit = nl80211_setdel_pmksa,
11448                 .policy = nl80211_policy,
11449                 .flags = GENL_UNS_ADMIN_PERM,
11450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11451                                   NL80211_FLAG_NEED_RTNL,
11452         },
11453         {
11454                 .cmd = NL80211_CMD_DEL_PMKSA,
11455                 .doit = nl80211_setdel_pmksa,
11456                 .policy = nl80211_policy,
11457                 .flags = GENL_UNS_ADMIN_PERM,
11458                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11459                                   NL80211_FLAG_NEED_RTNL,
11460         },
11461         {
11462                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11463                 .doit = nl80211_flush_pmksa,
11464                 .policy = nl80211_policy,
11465                 .flags = GENL_UNS_ADMIN_PERM,
11466                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11467                                   NL80211_FLAG_NEED_RTNL,
11468         },
11469         {
11470                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11471                 .doit = nl80211_remain_on_channel,
11472                 .policy = nl80211_policy,
11473                 .flags = GENL_UNS_ADMIN_PERM,
11474                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11475                                   NL80211_FLAG_NEED_RTNL,
11476         },
11477         {
11478                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11479                 .doit = nl80211_cancel_remain_on_channel,
11480                 .policy = nl80211_policy,
11481                 .flags = GENL_UNS_ADMIN_PERM,
11482                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11483                                   NL80211_FLAG_NEED_RTNL,
11484         },
11485         {
11486                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11487                 .doit = nl80211_set_tx_bitrate_mask,
11488                 .policy = nl80211_policy,
11489                 .flags = GENL_UNS_ADMIN_PERM,
11490                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11491                                   NL80211_FLAG_NEED_RTNL,
11492         },
11493         {
11494                 .cmd = NL80211_CMD_REGISTER_FRAME,
11495                 .doit = nl80211_register_mgmt,
11496                 .policy = nl80211_policy,
11497                 .flags = GENL_UNS_ADMIN_PERM,
11498                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11499                                   NL80211_FLAG_NEED_RTNL,
11500         },
11501         {
11502                 .cmd = NL80211_CMD_FRAME,
11503                 .doit = nl80211_tx_mgmt,
11504                 .policy = nl80211_policy,
11505                 .flags = GENL_UNS_ADMIN_PERM,
11506                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11507                                   NL80211_FLAG_NEED_RTNL,
11508         },
11509         {
11510                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11511                 .doit = nl80211_tx_mgmt_cancel_wait,
11512                 .policy = nl80211_policy,
11513                 .flags = GENL_UNS_ADMIN_PERM,
11514                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11515                                   NL80211_FLAG_NEED_RTNL,
11516         },
11517         {
11518                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11519                 .doit = nl80211_set_power_save,
11520                 .policy = nl80211_policy,
11521                 .flags = GENL_UNS_ADMIN_PERM,
11522                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11523                                   NL80211_FLAG_NEED_RTNL,
11524         },
11525         {
11526                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11527                 .doit = nl80211_get_power_save,
11528                 .policy = nl80211_policy,
11529                 /* can be retrieved by unprivileged users */
11530                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11531                                   NL80211_FLAG_NEED_RTNL,
11532         },
11533         {
11534                 .cmd = NL80211_CMD_SET_CQM,
11535                 .doit = nl80211_set_cqm,
11536                 .policy = nl80211_policy,
11537                 .flags = GENL_UNS_ADMIN_PERM,
11538                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11539                                   NL80211_FLAG_NEED_RTNL,
11540         },
11541         {
11542                 .cmd = NL80211_CMD_SET_CHANNEL,
11543                 .doit = nl80211_set_channel,
11544                 .policy = nl80211_policy,
11545                 .flags = GENL_UNS_ADMIN_PERM,
11546                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11547                                   NL80211_FLAG_NEED_RTNL,
11548         },
11549         {
11550                 .cmd = NL80211_CMD_SET_WDS_PEER,
11551                 .doit = nl80211_set_wds_peer,
11552                 .policy = nl80211_policy,
11553                 .flags = GENL_UNS_ADMIN_PERM,
11554                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11555                                   NL80211_FLAG_NEED_RTNL,
11556         },
11557         {
11558                 .cmd = NL80211_CMD_JOIN_MESH,
11559                 .doit = nl80211_join_mesh,
11560                 .policy = nl80211_policy,
11561                 .flags = GENL_UNS_ADMIN_PERM,
11562                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11563                                   NL80211_FLAG_NEED_RTNL,
11564         },
11565         {
11566                 .cmd = NL80211_CMD_LEAVE_MESH,
11567                 .doit = nl80211_leave_mesh,
11568                 .policy = nl80211_policy,
11569                 .flags = GENL_UNS_ADMIN_PERM,
11570                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11571                                   NL80211_FLAG_NEED_RTNL,
11572         },
11573         {
11574                 .cmd = NL80211_CMD_JOIN_OCB,
11575                 .doit = nl80211_join_ocb,
11576                 .policy = nl80211_policy,
11577                 .flags = GENL_UNS_ADMIN_PERM,
11578                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11579                                   NL80211_FLAG_NEED_RTNL,
11580         },
11581         {
11582                 .cmd = NL80211_CMD_LEAVE_OCB,
11583                 .doit = nl80211_leave_ocb,
11584                 .policy = nl80211_policy,
11585                 .flags = GENL_UNS_ADMIN_PERM,
11586                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11587                                   NL80211_FLAG_NEED_RTNL,
11588         },
11589 #ifdef CONFIG_PM
11590         {
11591                 .cmd = NL80211_CMD_GET_WOWLAN,
11592                 .doit = nl80211_get_wowlan,
11593                 .policy = nl80211_policy,
11594                 /* can be retrieved by unprivileged users */
11595                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11596                                   NL80211_FLAG_NEED_RTNL,
11597         },
11598         {
11599                 .cmd = NL80211_CMD_SET_WOWLAN,
11600                 .doit = nl80211_set_wowlan,
11601                 .policy = nl80211_policy,
11602                 .flags = GENL_UNS_ADMIN_PERM,
11603                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11604                                   NL80211_FLAG_NEED_RTNL,
11605         },
11606 #endif
11607         {
11608                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11609                 .doit = nl80211_set_rekey_data,
11610                 .policy = nl80211_policy,
11611                 .flags = GENL_UNS_ADMIN_PERM,
11612                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11613                                   NL80211_FLAG_NEED_RTNL |
11614                                   NL80211_FLAG_CLEAR_SKB,
11615         },
11616         {
11617                 .cmd = NL80211_CMD_TDLS_MGMT,
11618                 .doit = nl80211_tdls_mgmt,
11619                 .policy = nl80211_policy,
11620                 .flags = GENL_UNS_ADMIN_PERM,
11621                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11622                                   NL80211_FLAG_NEED_RTNL,
11623         },
11624         {
11625                 .cmd = NL80211_CMD_TDLS_OPER,
11626                 .doit = nl80211_tdls_oper,
11627                 .policy = nl80211_policy,
11628                 .flags = GENL_UNS_ADMIN_PERM,
11629                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11630                                   NL80211_FLAG_NEED_RTNL,
11631         },
11632         {
11633                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11634                 .doit = nl80211_register_unexpected_frame,
11635                 .policy = nl80211_policy,
11636                 .flags = GENL_UNS_ADMIN_PERM,
11637                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11638                                   NL80211_FLAG_NEED_RTNL,
11639         },
11640         {
11641                 .cmd = NL80211_CMD_PROBE_CLIENT,
11642                 .doit = nl80211_probe_client,
11643                 .policy = nl80211_policy,
11644                 .flags = GENL_UNS_ADMIN_PERM,
11645                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11646                                   NL80211_FLAG_NEED_RTNL,
11647         },
11648         {
11649                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11650                 .doit = nl80211_register_beacons,
11651                 .policy = nl80211_policy,
11652                 .flags = GENL_UNS_ADMIN_PERM,
11653                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11654                                   NL80211_FLAG_NEED_RTNL,
11655         },
11656         {
11657                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11658                 .doit = nl80211_set_noack_map,
11659                 .policy = nl80211_policy,
11660                 .flags = GENL_UNS_ADMIN_PERM,
11661                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11662                                   NL80211_FLAG_NEED_RTNL,
11663         },
11664         {
11665                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11666                 .doit = nl80211_start_p2p_device,
11667                 .policy = nl80211_policy,
11668                 .flags = GENL_UNS_ADMIN_PERM,
11669                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11670                                   NL80211_FLAG_NEED_RTNL,
11671         },
11672         {
11673                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11674                 .doit = nl80211_stop_p2p_device,
11675                 .policy = nl80211_policy,
11676                 .flags = GENL_UNS_ADMIN_PERM,
11677                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11678                                   NL80211_FLAG_NEED_RTNL,
11679         },
11680         {
11681                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11682                 .doit = nl80211_set_mcast_rate,
11683                 .policy = nl80211_policy,
11684                 .flags = GENL_UNS_ADMIN_PERM,
11685                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11686                                   NL80211_FLAG_NEED_RTNL,
11687         },
11688         {
11689                 .cmd = NL80211_CMD_SET_MAC_ACL,
11690                 .doit = nl80211_set_mac_acl,
11691                 .policy = nl80211_policy,
11692                 .flags = GENL_UNS_ADMIN_PERM,
11693                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11694                                   NL80211_FLAG_NEED_RTNL,
11695         },
11696         {
11697                 .cmd = NL80211_CMD_RADAR_DETECT,
11698                 .doit = nl80211_start_radar_detection,
11699                 .policy = nl80211_policy,
11700                 .flags = GENL_UNS_ADMIN_PERM,
11701                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11702                                   NL80211_FLAG_NEED_RTNL,
11703         },
11704         {
11705                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11706                 .doit = nl80211_get_protocol_features,
11707                 .policy = nl80211_policy,
11708         },
11709         {
11710                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11711                 .doit = nl80211_update_ft_ies,
11712                 .policy = nl80211_policy,
11713                 .flags = GENL_UNS_ADMIN_PERM,
11714                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11715                                   NL80211_FLAG_NEED_RTNL,
11716         },
11717         {
11718                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11719                 .doit = nl80211_crit_protocol_start,
11720                 .policy = nl80211_policy,
11721                 .flags = GENL_UNS_ADMIN_PERM,
11722                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11723                                   NL80211_FLAG_NEED_RTNL,
11724         },
11725         {
11726                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11727                 .doit = nl80211_crit_protocol_stop,
11728                 .policy = nl80211_policy,
11729                 .flags = GENL_UNS_ADMIN_PERM,
11730                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11731                                   NL80211_FLAG_NEED_RTNL,
11732         },
11733         {
11734                 .cmd = NL80211_CMD_GET_COALESCE,
11735                 .doit = nl80211_get_coalesce,
11736                 .policy = nl80211_policy,
11737                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11738                                   NL80211_FLAG_NEED_RTNL,
11739         },
11740         {
11741                 .cmd = NL80211_CMD_SET_COALESCE,
11742                 .doit = nl80211_set_coalesce,
11743                 .policy = nl80211_policy,
11744                 .flags = GENL_UNS_ADMIN_PERM,
11745                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11746                                   NL80211_FLAG_NEED_RTNL,
11747         },
11748         {
11749                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11750                 .doit = nl80211_channel_switch,
11751                 .policy = nl80211_policy,
11752                 .flags = GENL_UNS_ADMIN_PERM,
11753                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11754                                   NL80211_FLAG_NEED_RTNL,
11755         },
11756         {
11757                 .cmd = NL80211_CMD_VENDOR,
11758                 .doit = nl80211_vendor_cmd,
11759                 .dumpit = nl80211_vendor_cmd_dump,
11760                 .policy = nl80211_policy,
11761                 .flags = GENL_UNS_ADMIN_PERM,
11762                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11763                                   NL80211_FLAG_NEED_RTNL,
11764         },
11765         {
11766                 .cmd = NL80211_CMD_SET_QOS_MAP,
11767                 .doit = nl80211_set_qos_map,
11768                 .policy = nl80211_policy,
11769                 .flags = GENL_UNS_ADMIN_PERM,
11770                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11771                                   NL80211_FLAG_NEED_RTNL,
11772         },
11773         {
11774                 .cmd = NL80211_CMD_ADD_TX_TS,
11775                 .doit = nl80211_add_tx_ts,
11776                 .policy = nl80211_policy,
11777                 .flags = GENL_UNS_ADMIN_PERM,
11778                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11779                                   NL80211_FLAG_NEED_RTNL,
11780         },
11781         {
11782                 .cmd = NL80211_CMD_DEL_TX_TS,
11783                 .doit = nl80211_del_tx_ts,
11784                 .policy = nl80211_policy,
11785                 .flags = GENL_UNS_ADMIN_PERM,
11786                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11787                                   NL80211_FLAG_NEED_RTNL,
11788         },
11789         {
11790                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11791                 .doit = nl80211_tdls_channel_switch,
11792                 .policy = nl80211_policy,
11793                 .flags = GENL_UNS_ADMIN_PERM,
11794                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11795                                   NL80211_FLAG_NEED_RTNL,
11796         },
11797         {
11798                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11799                 .doit = nl80211_tdls_cancel_channel_switch,
11800                 .policy = nl80211_policy,
11801                 .flags = GENL_UNS_ADMIN_PERM,
11802                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11803                                   NL80211_FLAG_NEED_RTNL,
11804         },
11805 };
11806
11807 /* notification functions */
11808
11809 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11810                           enum nl80211_commands cmd)
11811 {
11812         struct sk_buff *msg;
11813         struct nl80211_dump_wiphy_state state = {};
11814
11815         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11816                 cmd != NL80211_CMD_DEL_WIPHY);
11817
11818         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11819         if (!msg)
11820                 return;
11821
11822         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11823                 nlmsg_free(msg);
11824                 return;
11825         }
11826
11827         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11828                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11829 }
11830
11831 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
11832                                 struct wireless_dev *wdev,
11833                                 enum nl80211_commands cmd)
11834 {
11835         struct sk_buff *msg;
11836
11837         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
11838                 cmd != NL80211_CMD_DEL_INTERFACE);
11839
11840         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11841         if (!msg)
11842                 return;
11843
11844         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
11845                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
11846                 nlmsg_free(msg);
11847                 return;
11848         }
11849
11850         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11851                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11852 }
11853
11854 static int nl80211_add_scan_req(struct sk_buff *msg,
11855                                 struct cfg80211_registered_device *rdev)
11856 {
11857         struct cfg80211_scan_request *req = rdev->scan_req;
11858         struct nlattr *nest;
11859         int i;
11860
11861         if (WARN_ON(!req))
11862                 return 0;
11863
11864         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11865         if (!nest)
11866                 goto nla_put_failure;
11867         for (i = 0; i < req->n_ssids; i++) {
11868                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11869                         goto nla_put_failure;
11870         }
11871         nla_nest_end(msg, nest);
11872
11873         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11874         if (!nest)
11875                 goto nla_put_failure;
11876         for (i = 0; i < req->n_channels; i++) {
11877                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11878                         goto nla_put_failure;
11879         }
11880         nla_nest_end(msg, nest);
11881
11882         if (req->ie &&
11883             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11884                 goto nla_put_failure;
11885
11886         if (req->flags &&
11887             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11888                 goto nla_put_failure;
11889
11890         if (req->info.scan_start_tsf &&
11891             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
11892                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
11893              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
11894                      req->info.tsf_bssid)))
11895                 goto nla_put_failure;
11896
11897         return 0;
11898  nla_put_failure:
11899         return -ENOBUFS;
11900 }
11901
11902 static int nl80211_send_scan_msg(struct sk_buff *msg,
11903                                  struct cfg80211_registered_device *rdev,
11904                                  struct wireless_dev *wdev,
11905                                  u32 portid, u32 seq, int flags,
11906                                  u32 cmd)
11907 {
11908         void *hdr;
11909
11910         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11911         if (!hdr)
11912                 return -1;
11913
11914         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11915             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11916                                          wdev->netdev->ifindex)) ||
11917             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11918                               NL80211_ATTR_PAD))
11919                 goto nla_put_failure;
11920
11921         /* ignore errors and send incomplete event anyway */
11922         nl80211_add_scan_req(msg, rdev);
11923
11924         genlmsg_end(msg, hdr);
11925         return 0;
11926
11927  nla_put_failure:
11928         genlmsg_cancel(msg, hdr);
11929         return -EMSGSIZE;
11930 }
11931
11932 static int
11933 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11934                             struct cfg80211_registered_device *rdev,
11935                             struct net_device *netdev,
11936                             u32 portid, u32 seq, int flags, u32 cmd)
11937 {
11938         void *hdr;
11939
11940         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11941         if (!hdr)
11942                 return -1;
11943
11944         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11945             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11946                 goto nla_put_failure;
11947
11948         genlmsg_end(msg, hdr);
11949         return 0;
11950
11951  nla_put_failure:
11952         genlmsg_cancel(msg, hdr);
11953         return -EMSGSIZE;
11954 }
11955
11956 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11957                              struct wireless_dev *wdev)
11958 {
11959         struct sk_buff *msg;
11960
11961         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11962         if (!msg)
11963                 return;
11964
11965         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11966                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11967                 nlmsg_free(msg);
11968                 return;
11969         }
11970
11971         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11972                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11973 }
11974
11975 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11976                                        struct wireless_dev *wdev, bool aborted)
11977 {
11978         struct sk_buff *msg;
11979
11980         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11981         if (!msg)
11982                 return NULL;
11983
11984         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11985                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11986                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11987                 nlmsg_free(msg);
11988                 return NULL;
11989         }
11990
11991         return msg;
11992 }
11993
11994 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11995                               struct sk_buff *msg)
11996 {
11997         if (!msg)
11998                 return;
11999
12000         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12001                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12002 }
12003
12004 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12005                                      struct net_device *netdev)
12006 {
12007         struct sk_buff *msg;
12008
12009         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12010         if (!msg)
12011                 return;
12012
12013         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12014                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12015                 nlmsg_free(msg);
12016                 return;
12017         }
12018
12019         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12020                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12021 }
12022
12023 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12024                              struct net_device *netdev, u32 cmd)
12025 {
12026         struct sk_buff *msg;
12027
12028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12029         if (!msg)
12030                 return;
12031
12032         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12033                 nlmsg_free(msg);
12034                 return;
12035         }
12036
12037         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12038                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12039 }
12040
12041 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12042                                           struct regulatory_request *request)
12043 {
12044         /* Userspace can always count this one always being set */
12045         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12046                 goto nla_put_failure;
12047
12048         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12049                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12050                                NL80211_REGDOM_TYPE_WORLD))
12051                         goto nla_put_failure;
12052         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12053                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12054                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12055                         goto nla_put_failure;
12056         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12057                    request->intersect) {
12058                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12059                                NL80211_REGDOM_TYPE_INTERSECTION))
12060                         goto nla_put_failure;
12061         } else {
12062                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12063                                NL80211_REGDOM_TYPE_COUNTRY) ||
12064                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12065                                    request->alpha2))
12066                         goto nla_put_failure;
12067         }
12068
12069         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12070                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12071
12072                 if (wiphy &&
12073                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12074                         goto nla_put_failure;
12075
12076                 if (wiphy &&
12077                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12078                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12079                         goto nla_put_failure;
12080         }
12081
12082         return true;
12083
12084 nla_put_failure:
12085         return false;
12086 }
12087
12088 /*
12089  * This can happen on global regulatory changes or device specific settings
12090  * based on custom regulatory domains.
12091  */
12092 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12093                                      struct regulatory_request *request)
12094 {
12095         struct sk_buff *msg;
12096         void *hdr;
12097
12098         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12099         if (!msg)
12100                 return;
12101
12102         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12103         if (!hdr) {
12104                 nlmsg_free(msg);
12105                 return;
12106         }
12107
12108         if (nl80211_reg_change_event_fill(msg, request) == false)
12109                 goto nla_put_failure;
12110
12111         genlmsg_end(msg, hdr);
12112
12113         rcu_read_lock();
12114         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12115                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12116         rcu_read_unlock();
12117
12118         return;
12119
12120 nla_put_failure:
12121         genlmsg_cancel(msg, hdr);
12122         nlmsg_free(msg);
12123 }
12124
12125 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12126                                     struct net_device *netdev,
12127                                     const u8 *buf, size_t len,
12128                                     enum nl80211_commands cmd, gfp_t gfp,
12129                                     int uapsd_queues)
12130 {
12131         struct sk_buff *msg;
12132         void *hdr;
12133
12134         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12135         if (!msg)
12136                 return;
12137
12138         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12139         if (!hdr) {
12140                 nlmsg_free(msg);
12141                 return;
12142         }
12143
12144         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12145             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12146             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12147                 goto nla_put_failure;
12148
12149         if (uapsd_queues >= 0) {
12150                 struct nlattr *nla_wmm =
12151                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12152                 if (!nla_wmm)
12153                         goto nla_put_failure;
12154
12155                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12156                                uapsd_queues))
12157                         goto nla_put_failure;
12158
12159                 nla_nest_end(msg, nla_wmm);
12160         }
12161
12162         genlmsg_end(msg, hdr);
12163
12164         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12165                                 NL80211_MCGRP_MLME, gfp);
12166         return;
12167
12168  nla_put_failure:
12169         genlmsg_cancel(msg, hdr);
12170         nlmsg_free(msg);
12171 }
12172
12173 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12174                           struct net_device *netdev, const u8 *buf,
12175                           size_t len, gfp_t gfp)
12176 {
12177         nl80211_send_mlme_event(rdev, netdev, buf, len,
12178                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12179 }
12180
12181 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12182                            struct net_device *netdev, const u8 *buf,
12183                            size_t len, gfp_t gfp, int uapsd_queues)
12184 {
12185         nl80211_send_mlme_event(rdev, netdev, buf, len,
12186                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12187 }
12188
12189 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12190                          struct net_device *netdev, const u8 *buf,
12191                          size_t len, gfp_t gfp)
12192 {
12193         nl80211_send_mlme_event(rdev, netdev, buf, len,
12194                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12195 }
12196
12197 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12198                            struct net_device *netdev, const u8 *buf,
12199                            size_t len, gfp_t gfp)
12200 {
12201         nl80211_send_mlme_event(rdev, netdev, buf, len,
12202                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12203 }
12204
12205 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12206                                   size_t len)
12207 {
12208         struct wireless_dev *wdev = dev->ieee80211_ptr;
12209         struct wiphy *wiphy = wdev->wiphy;
12210         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12211         const struct ieee80211_mgmt *mgmt = (void *)buf;
12212         u32 cmd;
12213
12214         if (WARN_ON(len < 2))
12215                 return;
12216
12217         if (ieee80211_is_deauth(mgmt->frame_control))
12218                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12219         else
12220                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12221
12222         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12223         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12224 }
12225 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12226
12227 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12228                                       struct net_device *netdev, int cmd,
12229                                       const u8 *addr, gfp_t gfp)
12230 {
12231         struct sk_buff *msg;
12232         void *hdr;
12233
12234         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12235         if (!msg)
12236                 return;
12237
12238         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12239         if (!hdr) {
12240                 nlmsg_free(msg);
12241                 return;
12242         }
12243
12244         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12245             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12246             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12247             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12248                 goto nla_put_failure;
12249
12250         genlmsg_end(msg, hdr);
12251
12252         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12253                                 NL80211_MCGRP_MLME, gfp);
12254         return;
12255
12256  nla_put_failure:
12257         genlmsg_cancel(msg, hdr);
12258         nlmsg_free(msg);
12259 }
12260
12261 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12262                                struct net_device *netdev, const u8 *addr,
12263                                gfp_t gfp)
12264 {
12265         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12266                                   addr, gfp);
12267 }
12268
12269 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12270                                 struct net_device *netdev, const u8 *addr,
12271                                 gfp_t gfp)
12272 {
12273         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12274                                   addr, gfp);
12275 }
12276
12277 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12278                                  struct net_device *netdev, const u8 *bssid,
12279                                  const u8 *req_ie, size_t req_ie_len,
12280                                  const u8 *resp_ie, size_t resp_ie_len,
12281                                  int status, gfp_t gfp)
12282 {
12283         struct sk_buff *msg;
12284         void *hdr;
12285
12286         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12287         if (!msg)
12288                 return;
12289
12290         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12291         if (!hdr) {
12292                 nlmsg_free(msg);
12293                 return;
12294         }
12295
12296         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12297             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12298             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12299             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12300                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12301                         status) ||
12302             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12303             (req_ie &&
12304              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12305             (resp_ie &&
12306              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12307                 goto nla_put_failure;
12308
12309         genlmsg_end(msg, hdr);
12310
12311         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12312                                 NL80211_MCGRP_MLME, gfp);
12313         return;
12314
12315  nla_put_failure:
12316         genlmsg_cancel(msg, hdr);
12317         nlmsg_free(msg);
12318 }
12319
12320 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12321                          struct net_device *netdev, const u8 *bssid,
12322                          const u8 *req_ie, size_t req_ie_len,
12323                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12324 {
12325         struct sk_buff *msg;
12326         void *hdr;
12327
12328         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12329         if (!msg)
12330                 return;
12331
12332         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12333         if (!hdr) {
12334                 nlmsg_free(msg);
12335                 return;
12336         }
12337
12338         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12339             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12340             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12341             (req_ie &&
12342              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12343             (resp_ie &&
12344              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12345                 goto nla_put_failure;
12346
12347         genlmsg_end(msg, hdr);
12348
12349         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12350                                 NL80211_MCGRP_MLME, gfp);
12351         return;
12352
12353  nla_put_failure:
12354         genlmsg_cancel(msg, hdr);
12355         nlmsg_free(msg);
12356 }
12357
12358 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12359                                struct net_device *netdev, u16 reason,
12360                                const u8 *ie, size_t ie_len, bool from_ap)
12361 {
12362         struct sk_buff *msg;
12363         void *hdr;
12364
12365         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12366         if (!msg)
12367                 return;
12368
12369         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12370         if (!hdr) {
12371                 nlmsg_free(msg);
12372                 return;
12373         }
12374
12375         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12376             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12377             (from_ap && reason &&
12378              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12379             (from_ap &&
12380              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12381             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12382                 goto nla_put_failure;
12383
12384         genlmsg_end(msg, hdr);
12385
12386         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12387                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12388         return;
12389
12390  nla_put_failure:
12391         genlmsg_cancel(msg, hdr);
12392         nlmsg_free(msg);
12393 }
12394
12395 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12396                              struct net_device *netdev, const u8 *bssid,
12397                              gfp_t gfp)
12398 {
12399         struct sk_buff *msg;
12400         void *hdr;
12401
12402         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12403         if (!msg)
12404                 return;
12405
12406         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12407         if (!hdr) {
12408                 nlmsg_free(msg);
12409                 return;
12410         }
12411
12412         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12413             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12414             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12415                 goto nla_put_failure;
12416
12417         genlmsg_end(msg, hdr);
12418
12419         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12420                                 NL80211_MCGRP_MLME, gfp);
12421         return;
12422
12423  nla_put_failure:
12424         genlmsg_cancel(msg, hdr);
12425         nlmsg_free(msg);
12426 }
12427
12428 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12429                                         const u8* ie, u8 ie_len, gfp_t gfp)
12430 {
12431         struct wireless_dev *wdev = dev->ieee80211_ptr;
12432         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12433         struct sk_buff *msg;
12434         void *hdr;
12435
12436         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12437                 return;
12438
12439         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12440
12441         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12442         if (!msg)
12443                 return;
12444
12445         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12446         if (!hdr) {
12447                 nlmsg_free(msg);
12448                 return;
12449         }
12450
12451         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12452             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12453             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12454             (ie_len && ie &&
12455              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12456                 goto nla_put_failure;
12457
12458         genlmsg_end(msg, hdr);
12459
12460         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12461                                 NL80211_MCGRP_MLME, gfp);
12462         return;
12463
12464  nla_put_failure:
12465         genlmsg_cancel(msg, hdr);
12466         nlmsg_free(msg);
12467 }
12468 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12469
12470 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12471                                  struct net_device *netdev, const u8 *addr,
12472                                  enum nl80211_key_type key_type, int key_id,
12473                                  const u8 *tsc, gfp_t gfp)
12474 {
12475         struct sk_buff *msg;
12476         void *hdr;
12477
12478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12479         if (!msg)
12480                 return;
12481
12482         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12483         if (!hdr) {
12484                 nlmsg_free(msg);
12485                 return;
12486         }
12487
12488         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12489             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12490             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12491             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12492             (key_id != -1 &&
12493              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12494             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12495                 goto nla_put_failure;
12496
12497         genlmsg_end(msg, hdr);
12498
12499         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12500                                 NL80211_MCGRP_MLME, gfp);
12501         return;
12502
12503  nla_put_failure:
12504         genlmsg_cancel(msg, hdr);
12505         nlmsg_free(msg);
12506 }
12507
12508 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12509                                     struct ieee80211_channel *channel_before,
12510                                     struct ieee80211_channel *channel_after)
12511 {
12512         struct sk_buff *msg;
12513         void *hdr;
12514         struct nlattr *nl_freq;
12515
12516         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12517         if (!msg)
12518                 return;
12519
12520         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12521         if (!hdr) {
12522                 nlmsg_free(msg);
12523                 return;
12524         }
12525
12526         /*
12527          * Since we are applying the beacon hint to a wiphy we know its
12528          * wiphy_idx is valid
12529          */
12530         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12531                 goto nla_put_failure;
12532
12533         /* Before */
12534         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12535         if (!nl_freq)
12536                 goto nla_put_failure;
12537         if (nl80211_msg_put_channel(msg, channel_before, false))
12538                 goto nla_put_failure;
12539         nla_nest_end(msg, nl_freq);
12540
12541         /* After */
12542         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12543         if (!nl_freq)
12544                 goto nla_put_failure;
12545         if (nl80211_msg_put_channel(msg, channel_after, false))
12546                 goto nla_put_failure;
12547         nla_nest_end(msg, nl_freq);
12548
12549         genlmsg_end(msg, hdr);
12550
12551         rcu_read_lock();
12552         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12553                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12554         rcu_read_unlock();
12555
12556         return;
12557
12558 nla_put_failure:
12559         genlmsg_cancel(msg, hdr);
12560         nlmsg_free(msg);
12561 }
12562
12563 static void nl80211_send_remain_on_chan_event(
12564         int cmd, struct cfg80211_registered_device *rdev,
12565         struct wireless_dev *wdev, u64 cookie,
12566         struct ieee80211_channel *chan,
12567         unsigned int duration, gfp_t gfp)
12568 {
12569         struct sk_buff *msg;
12570         void *hdr;
12571
12572         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12573         if (!msg)
12574                 return;
12575
12576         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12577         if (!hdr) {
12578                 nlmsg_free(msg);
12579                 return;
12580         }
12581
12582         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12583             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12584                                          wdev->netdev->ifindex)) ||
12585             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12586                               NL80211_ATTR_PAD) ||
12587             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12588             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12589                         NL80211_CHAN_NO_HT) ||
12590             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12591                               NL80211_ATTR_PAD))
12592                 goto nla_put_failure;
12593
12594         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12595             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12596                 goto nla_put_failure;
12597
12598         genlmsg_end(msg, hdr);
12599
12600         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12601                                 NL80211_MCGRP_MLME, gfp);
12602         return;
12603
12604  nla_put_failure:
12605         genlmsg_cancel(msg, hdr);
12606         nlmsg_free(msg);
12607 }
12608
12609 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12610                                struct ieee80211_channel *chan,
12611                                unsigned int duration, gfp_t gfp)
12612 {
12613         struct wiphy *wiphy = wdev->wiphy;
12614         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12615
12616         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12617         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12618                                           rdev, wdev, cookie, chan,
12619                                           duration, gfp);
12620 }
12621 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12622
12623 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12624                                         struct ieee80211_channel *chan,
12625                                         gfp_t gfp)
12626 {
12627         struct wiphy *wiphy = wdev->wiphy;
12628         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12629
12630         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12631         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12632                                           rdev, wdev, cookie, chan, 0, gfp);
12633 }
12634 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12635
12636 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12637                       struct station_info *sinfo, gfp_t gfp)
12638 {
12639         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12640         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12641         struct sk_buff *msg;
12642
12643         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12644
12645         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12646         if (!msg)
12647                 return;
12648
12649         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12650                                  rdev, dev, mac_addr, sinfo) < 0) {
12651                 nlmsg_free(msg);
12652                 return;
12653         }
12654
12655         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12656                                 NL80211_MCGRP_MLME, gfp);
12657 }
12658 EXPORT_SYMBOL(cfg80211_new_sta);
12659
12660 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12661                             struct station_info *sinfo, gfp_t gfp)
12662 {
12663         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12664         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12665         struct sk_buff *msg;
12666         struct station_info empty_sinfo = {};
12667
12668         if (!sinfo)
12669                 sinfo = &empty_sinfo;
12670
12671         trace_cfg80211_del_sta(dev, mac_addr);
12672
12673         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12674         if (!msg)
12675                 return;
12676
12677         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12678                                  rdev, dev, mac_addr, sinfo) < 0) {
12679                 nlmsg_free(msg);
12680                 return;
12681         }
12682
12683         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12684                                 NL80211_MCGRP_MLME, gfp);
12685 }
12686 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12687
12688 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12689                           enum nl80211_connect_failed_reason reason,
12690                           gfp_t gfp)
12691 {
12692         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12693         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12694         struct sk_buff *msg;
12695         void *hdr;
12696
12697         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12698         if (!msg)
12699                 return;
12700
12701         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12702         if (!hdr) {
12703                 nlmsg_free(msg);
12704                 return;
12705         }
12706
12707         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12708             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12709             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12710                 goto nla_put_failure;
12711
12712         genlmsg_end(msg, hdr);
12713
12714         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12715                                 NL80211_MCGRP_MLME, gfp);
12716         return;
12717
12718  nla_put_failure:
12719         genlmsg_cancel(msg, hdr);
12720         nlmsg_free(msg);
12721 }
12722 EXPORT_SYMBOL(cfg80211_conn_failed);
12723
12724 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12725                                        const u8 *addr, gfp_t gfp)
12726 {
12727         struct wireless_dev *wdev = dev->ieee80211_ptr;
12728         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12729         struct sk_buff *msg;
12730         void *hdr;
12731         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12732
12733         if (!nlportid)
12734                 return false;
12735
12736         msg = nlmsg_new(100, gfp);
12737         if (!msg)
12738                 return true;
12739
12740         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12741         if (!hdr) {
12742                 nlmsg_free(msg);
12743                 return true;
12744         }
12745
12746         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12747             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12748             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12749                 goto nla_put_failure;
12750
12751         genlmsg_end(msg, hdr);
12752         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12753         return true;
12754
12755  nla_put_failure:
12756         genlmsg_cancel(msg, hdr);
12757         nlmsg_free(msg);
12758         return true;
12759 }
12760
12761 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12762                                 const u8 *addr, gfp_t gfp)
12763 {
12764         struct wireless_dev *wdev = dev->ieee80211_ptr;
12765         bool ret;
12766
12767         trace_cfg80211_rx_spurious_frame(dev, addr);
12768
12769         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12770                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12771                 trace_cfg80211_return_bool(false);
12772                 return false;
12773         }
12774         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12775                                          addr, gfp);
12776         trace_cfg80211_return_bool(ret);
12777         return ret;
12778 }
12779 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12780
12781 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12782                                         const u8 *addr, gfp_t gfp)
12783 {
12784         struct wireless_dev *wdev = dev->ieee80211_ptr;
12785         bool ret;
12786
12787         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12788
12789         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12790                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12791                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12792                 trace_cfg80211_return_bool(false);
12793                 return false;
12794         }
12795         ret = __nl80211_unexpected_frame(dev,
12796                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12797                                          addr, gfp);
12798         trace_cfg80211_return_bool(ret);
12799         return ret;
12800 }
12801 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12802
12803 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12804                       struct wireless_dev *wdev, u32 nlportid,
12805                       int freq, int sig_dbm,
12806                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12807 {
12808         struct net_device *netdev = wdev->netdev;
12809         struct sk_buff *msg;
12810         void *hdr;
12811
12812         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12813         if (!msg)
12814                 return -ENOMEM;
12815
12816         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12817         if (!hdr) {
12818                 nlmsg_free(msg);
12819                 return -ENOMEM;
12820         }
12821
12822         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12823             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12824                                         netdev->ifindex)) ||
12825             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12826                               NL80211_ATTR_PAD) ||
12827             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12828             (sig_dbm &&
12829              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12830             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12831             (flags &&
12832              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12833                 goto nla_put_failure;
12834
12835         genlmsg_end(msg, hdr);
12836
12837         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12838
12839  nla_put_failure:
12840         genlmsg_cancel(msg, hdr);
12841         nlmsg_free(msg);
12842         return -ENOBUFS;
12843 }
12844
12845 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12846                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12847 {
12848         struct wiphy *wiphy = wdev->wiphy;
12849         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12850         struct net_device *netdev = wdev->netdev;
12851         struct sk_buff *msg;
12852         void *hdr;
12853
12854         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12855
12856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12857         if (!msg)
12858                 return;
12859
12860         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12861         if (!hdr) {
12862                 nlmsg_free(msg);
12863                 return;
12864         }
12865
12866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12867             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12868                                    netdev->ifindex)) ||
12869             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12870                               NL80211_ATTR_PAD) ||
12871             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12872             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12873                               NL80211_ATTR_PAD) ||
12874             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12875                 goto nla_put_failure;
12876
12877         genlmsg_end(msg, hdr);
12878
12879         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12880                                 NL80211_MCGRP_MLME, gfp);
12881         return;
12882
12883  nla_put_failure:
12884         genlmsg_cancel(msg, hdr);
12885         nlmsg_free(msg);
12886 }
12887 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12888
12889 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12890                                             const char *mac, gfp_t gfp)
12891 {
12892         struct wireless_dev *wdev = dev->ieee80211_ptr;
12893         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12894         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12895         void **cb;
12896
12897         if (!msg)
12898                 return NULL;
12899
12900         cb = (void **)msg->cb;
12901
12902         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12903         if (!cb[0]) {
12904                 nlmsg_free(msg);
12905                 return NULL;
12906         }
12907
12908         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12909             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12910                 goto nla_put_failure;
12911
12912         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12913                 goto nla_put_failure;
12914
12915         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12916         if (!cb[1])
12917                 goto nla_put_failure;
12918
12919         cb[2] = rdev;
12920
12921         return msg;
12922  nla_put_failure:
12923         nlmsg_free(msg);
12924         return NULL;
12925 }
12926
12927 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12928 {
12929         void **cb = (void **)msg->cb;
12930         struct cfg80211_registered_device *rdev = cb[2];
12931
12932         nla_nest_end(msg, cb[1]);
12933         genlmsg_end(msg, cb[0]);
12934
12935         memset(msg->cb, 0, sizeof(msg->cb));
12936
12937         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12938                                 NL80211_MCGRP_MLME, gfp);
12939 }
12940
12941 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12942                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12943                               gfp_t gfp)
12944 {
12945         struct sk_buff *msg;
12946
12947         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12948
12949         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12950                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12951                 return;
12952
12953         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12954         if (!msg)
12955                 return;
12956
12957         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12958                         rssi_event))
12959                 goto nla_put_failure;
12960
12961         cfg80211_send_cqm(msg, gfp);
12962
12963         return;
12964
12965  nla_put_failure:
12966         nlmsg_free(msg);
12967 }
12968 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12969
12970 void cfg80211_cqm_txe_notify(struct net_device *dev,
12971                              const u8 *peer, u32 num_packets,
12972                              u32 rate, u32 intvl, gfp_t gfp)
12973 {
12974         struct sk_buff *msg;
12975
12976         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12977         if (!msg)
12978                 return;
12979
12980         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12981                 goto nla_put_failure;
12982
12983         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12984                 goto nla_put_failure;
12985
12986         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12987                 goto nla_put_failure;
12988
12989         cfg80211_send_cqm(msg, gfp);
12990         return;
12991
12992  nla_put_failure:
12993         nlmsg_free(msg);
12994 }
12995 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12996
12997 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12998                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12999 {
13000         struct sk_buff *msg;
13001
13002         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
13003
13004         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13005         if (!msg)
13006                 return;
13007
13008         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13009                 goto nla_put_failure;
13010
13011         cfg80211_send_cqm(msg, gfp);
13012         return;
13013
13014  nla_put_failure:
13015         nlmsg_free(msg);
13016 }
13017 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13018
13019 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13020 {
13021         struct sk_buff *msg;
13022
13023         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13024         if (!msg)
13025                 return;
13026
13027         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13028                 goto nla_put_failure;
13029
13030         cfg80211_send_cqm(msg, gfp);
13031         return;
13032
13033  nla_put_failure:
13034         nlmsg_free(msg);
13035 }
13036 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13037
13038 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13039                                      struct net_device *netdev, const u8 *bssid,
13040                                      const u8 *replay_ctr, gfp_t gfp)
13041 {
13042         struct sk_buff *msg;
13043         struct nlattr *rekey_attr;
13044         void *hdr;
13045
13046         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13047         if (!msg)
13048                 return;
13049
13050         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13051         if (!hdr) {
13052                 nlmsg_free(msg);
13053                 return;
13054         }
13055
13056         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13057             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13058             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13059                 goto nla_put_failure;
13060
13061         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13062         if (!rekey_attr)
13063                 goto nla_put_failure;
13064
13065         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13066                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13067                 goto nla_put_failure;
13068
13069         nla_nest_end(msg, rekey_attr);
13070
13071         genlmsg_end(msg, hdr);
13072
13073         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13074                                 NL80211_MCGRP_MLME, gfp);
13075         return;
13076
13077  nla_put_failure:
13078         genlmsg_cancel(msg, hdr);
13079         nlmsg_free(msg);
13080 }
13081
13082 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13083                                const u8 *replay_ctr, gfp_t gfp)
13084 {
13085         struct wireless_dev *wdev = dev->ieee80211_ptr;
13086         struct wiphy *wiphy = wdev->wiphy;
13087         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13088
13089         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13090         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13091 }
13092 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13093
13094 static void
13095 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13096                                struct net_device *netdev, int index,
13097                                const u8 *bssid, bool preauth, gfp_t gfp)
13098 {
13099         struct sk_buff *msg;
13100         struct nlattr *attr;
13101         void *hdr;
13102
13103         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13104         if (!msg)
13105                 return;
13106
13107         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13108         if (!hdr) {
13109                 nlmsg_free(msg);
13110                 return;
13111         }
13112
13113         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13114             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13115                 goto nla_put_failure;
13116
13117         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13118         if (!attr)
13119                 goto nla_put_failure;
13120
13121         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13122             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13123             (preauth &&
13124              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13125                 goto nla_put_failure;
13126
13127         nla_nest_end(msg, attr);
13128
13129         genlmsg_end(msg, hdr);
13130
13131         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13132                                 NL80211_MCGRP_MLME, gfp);
13133         return;
13134
13135  nla_put_failure:
13136         genlmsg_cancel(msg, hdr);
13137         nlmsg_free(msg);
13138 }
13139
13140 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13141                                      const u8 *bssid, bool preauth, gfp_t gfp)
13142 {
13143         struct wireless_dev *wdev = dev->ieee80211_ptr;
13144         struct wiphy *wiphy = wdev->wiphy;
13145         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13146
13147         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13148         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13149 }
13150 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13151
13152 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13153                                      struct net_device *netdev,
13154                                      struct cfg80211_chan_def *chandef,
13155                                      gfp_t gfp,
13156                                      enum nl80211_commands notif,
13157                                      u8 count)
13158 {
13159         struct sk_buff *msg;
13160         void *hdr;
13161
13162         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13163         if (!msg)
13164                 return;
13165
13166         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13167         if (!hdr) {
13168                 nlmsg_free(msg);
13169                 return;
13170         }
13171
13172         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13173                 goto nla_put_failure;
13174
13175         if (nl80211_send_chandef(msg, chandef))
13176                 goto nla_put_failure;
13177
13178         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13179             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13180                         goto nla_put_failure;
13181
13182         genlmsg_end(msg, hdr);
13183
13184         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13185                                 NL80211_MCGRP_MLME, gfp);
13186         return;
13187
13188  nla_put_failure:
13189         genlmsg_cancel(msg, hdr);
13190         nlmsg_free(msg);
13191 }
13192
13193 void cfg80211_ch_switch_notify(struct net_device *dev,
13194                                struct cfg80211_chan_def *chandef)
13195 {
13196         struct wireless_dev *wdev = dev->ieee80211_ptr;
13197         struct wiphy *wiphy = wdev->wiphy;
13198         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13199
13200         ASSERT_WDEV_LOCK(wdev);
13201
13202         trace_cfg80211_ch_switch_notify(dev, chandef);
13203
13204         wdev->chandef = *chandef;
13205         wdev->preset_chandef = *chandef;
13206         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13207                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13208 }
13209 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13210
13211 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13212                                        struct cfg80211_chan_def *chandef,
13213                                        u8 count)
13214 {
13215         struct wireless_dev *wdev = dev->ieee80211_ptr;
13216         struct wiphy *wiphy = wdev->wiphy;
13217         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13218
13219         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13220
13221         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13222                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13223 }
13224 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13225
13226 void
13227 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13228                      const struct cfg80211_chan_def *chandef,
13229                      enum nl80211_radar_event event,
13230                      struct net_device *netdev, gfp_t gfp)
13231 {
13232         struct sk_buff *msg;
13233         void *hdr;
13234
13235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13236         if (!msg)
13237                 return;
13238
13239         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13240         if (!hdr) {
13241                 nlmsg_free(msg);
13242                 return;
13243         }
13244
13245         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13246                 goto nla_put_failure;
13247
13248         /* NOP and radar events don't need a netdev parameter */
13249         if (netdev) {
13250                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13251
13252                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13253                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13254                                       NL80211_ATTR_PAD))
13255                         goto nla_put_failure;
13256         }
13257
13258         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13259                 goto nla_put_failure;
13260
13261         if (nl80211_send_chandef(msg, chandef))
13262                 goto nla_put_failure;
13263
13264         genlmsg_end(msg, hdr);
13265
13266         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13267                                 NL80211_MCGRP_MLME, gfp);
13268         return;
13269
13270  nla_put_failure:
13271         genlmsg_cancel(msg, hdr);
13272         nlmsg_free(msg);
13273 }
13274
13275 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13276                            u64 cookie, bool acked, gfp_t gfp)
13277 {
13278         struct wireless_dev *wdev = dev->ieee80211_ptr;
13279         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13280         struct sk_buff *msg;
13281         void *hdr;
13282
13283         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13284
13285         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13286
13287         if (!msg)
13288                 return;
13289
13290         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13291         if (!hdr) {
13292                 nlmsg_free(msg);
13293                 return;
13294         }
13295
13296         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13297             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13298             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13299             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13300                               NL80211_ATTR_PAD) ||
13301             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13302                 goto nla_put_failure;
13303
13304         genlmsg_end(msg, hdr);
13305
13306         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13307                                 NL80211_MCGRP_MLME, gfp);
13308         return;
13309
13310  nla_put_failure:
13311         genlmsg_cancel(msg, hdr);
13312         nlmsg_free(msg);
13313 }
13314 EXPORT_SYMBOL(cfg80211_probe_status);
13315
13316 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13317                                  const u8 *frame, size_t len,
13318                                  int freq, int sig_dbm)
13319 {
13320         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13321         struct sk_buff *msg;
13322         void *hdr;
13323         struct cfg80211_beacon_registration *reg;
13324
13325         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13326
13327         spin_lock_bh(&rdev->beacon_registrations_lock);
13328         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13329                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13330                 if (!msg) {
13331                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13332                         return;
13333                 }
13334
13335                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13336                 if (!hdr)
13337                         goto nla_put_failure;
13338
13339                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13340                     (freq &&
13341                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13342                     (sig_dbm &&
13343                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13344                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13345                         goto nla_put_failure;
13346
13347                 genlmsg_end(msg, hdr);
13348
13349                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13350         }
13351         spin_unlock_bh(&rdev->beacon_registrations_lock);
13352         return;
13353
13354  nla_put_failure:
13355         spin_unlock_bh(&rdev->beacon_registrations_lock);
13356         if (hdr)
13357                 genlmsg_cancel(msg, hdr);
13358         nlmsg_free(msg);
13359 }
13360 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13361
13362 #ifdef CONFIG_PM
13363 static int cfg80211_net_detect_results(struct sk_buff *msg,
13364                                        struct cfg80211_wowlan_wakeup *wakeup)
13365 {
13366         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13367         struct nlattr *nl_results, *nl_match, *nl_freqs;
13368         int i, j;
13369
13370         nl_results = nla_nest_start(
13371                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13372         if (!nl_results)
13373                 return -EMSGSIZE;
13374
13375         for (i = 0; i < nd->n_matches; i++) {
13376                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13377
13378                 nl_match = nla_nest_start(msg, i);
13379                 if (!nl_match)
13380                         break;
13381
13382                 /* The SSID attribute is optional in nl80211, but for
13383                  * simplicity reasons it's always present in the
13384                  * cfg80211 structure.  If a driver can't pass the
13385                  * SSID, that needs to be changed.  A zero length SSID
13386                  * is still a valid SSID (wildcard), so it cannot be
13387                  * used for this purpose.
13388                  */
13389                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13390                             match->ssid.ssid)) {
13391                         nla_nest_cancel(msg, nl_match);
13392                         goto out;
13393                 }
13394
13395                 if (match->n_channels) {
13396                         nl_freqs = nla_nest_start(
13397                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13398                         if (!nl_freqs) {
13399                                 nla_nest_cancel(msg, nl_match);
13400                                 goto out;
13401                         }
13402
13403                         for (j = 0; j < match->n_channels; j++) {
13404                                 if (nla_put_u32(msg, j, match->channels[j])) {
13405                                         nla_nest_cancel(msg, nl_freqs);
13406                                         nla_nest_cancel(msg, nl_match);
13407                                         goto out;
13408                                 }
13409                         }
13410
13411                         nla_nest_end(msg, nl_freqs);
13412                 }
13413
13414                 nla_nest_end(msg, nl_match);
13415         }
13416
13417 out:
13418         nla_nest_end(msg, nl_results);
13419         return 0;
13420 }
13421
13422 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13423                                    struct cfg80211_wowlan_wakeup *wakeup,
13424                                    gfp_t gfp)
13425 {
13426         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13427         struct sk_buff *msg;
13428         void *hdr;
13429         int size = 200;
13430
13431         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13432
13433         if (wakeup)
13434                 size += wakeup->packet_present_len;
13435
13436         msg = nlmsg_new(size, gfp);
13437         if (!msg)
13438                 return;
13439
13440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13441         if (!hdr)
13442                 goto free_msg;
13443
13444         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13445             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13446                               NL80211_ATTR_PAD))
13447                 goto free_msg;
13448
13449         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13450                                         wdev->netdev->ifindex))
13451                 goto free_msg;
13452
13453         if (wakeup) {
13454                 struct nlattr *reasons;
13455
13456                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13457                 if (!reasons)
13458                         goto free_msg;
13459
13460                 if (wakeup->disconnect &&
13461                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13462                         goto free_msg;
13463                 if (wakeup->magic_pkt &&
13464                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13465                         goto free_msg;
13466                 if (wakeup->gtk_rekey_failure &&
13467                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13468                         goto free_msg;
13469                 if (wakeup->eap_identity_req &&
13470                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13471                         goto free_msg;
13472                 if (wakeup->four_way_handshake &&
13473                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13474                         goto free_msg;
13475                 if (wakeup->rfkill_release &&
13476                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13477                         goto free_msg;
13478
13479                 if (wakeup->pattern_idx >= 0 &&
13480                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13481                                 wakeup->pattern_idx))
13482                         goto free_msg;
13483
13484                 if (wakeup->tcp_match &&
13485                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13486                         goto free_msg;
13487
13488                 if (wakeup->tcp_connlost &&
13489                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13490                         goto free_msg;
13491
13492                 if (wakeup->tcp_nomoretokens &&
13493                     nla_put_flag(msg,
13494                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13495                         goto free_msg;
13496
13497                 if (wakeup->packet) {
13498                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13499                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13500
13501                         if (!wakeup->packet_80211) {
13502                                 pkt_attr =
13503                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13504                                 len_attr =
13505                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13506                         }
13507
13508                         if (wakeup->packet_len &&
13509                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13510                                 goto free_msg;
13511
13512                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13513                                     wakeup->packet))
13514                                 goto free_msg;
13515                 }
13516
13517                 if (wakeup->net_detect &&
13518                     cfg80211_net_detect_results(msg, wakeup))
13519                                 goto free_msg;
13520
13521                 nla_nest_end(msg, reasons);
13522         }
13523
13524         genlmsg_end(msg, hdr);
13525
13526         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13527                                 NL80211_MCGRP_MLME, gfp);
13528         return;
13529
13530  free_msg:
13531         nlmsg_free(msg);
13532 }
13533 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13534 #endif
13535
13536 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13537                                 enum nl80211_tdls_operation oper,
13538                                 u16 reason_code, gfp_t gfp)
13539 {
13540         struct wireless_dev *wdev = dev->ieee80211_ptr;
13541         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13542         struct sk_buff *msg;
13543         void *hdr;
13544
13545         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13546                                          reason_code);
13547
13548         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13549         if (!msg)
13550                 return;
13551
13552         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13553         if (!hdr) {
13554                 nlmsg_free(msg);
13555                 return;
13556         }
13557
13558         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13559             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13560             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13561             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13562             (reason_code > 0 &&
13563              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13564                 goto nla_put_failure;
13565
13566         genlmsg_end(msg, hdr);
13567
13568         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13569                                 NL80211_MCGRP_MLME, gfp);
13570         return;
13571
13572  nla_put_failure:
13573         genlmsg_cancel(msg, hdr);
13574         nlmsg_free(msg);
13575 }
13576 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13577
13578 static int nl80211_netlink_notify(struct notifier_block * nb,
13579                                   unsigned long state,
13580                                   void *_notify)
13581 {
13582         struct netlink_notify *notify = _notify;
13583         struct cfg80211_registered_device *rdev;
13584         struct wireless_dev *wdev;
13585         struct cfg80211_beacon_registration *reg, *tmp;
13586
13587         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13588                 return NOTIFY_DONE;
13589
13590         rcu_read_lock();
13591
13592         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13593                 bool schedule_destroy_work = false;
13594                 bool schedule_scan_stop = false;
13595                 struct cfg80211_sched_scan_request *sched_scan_req =
13596                         rcu_dereference(rdev->sched_scan_req);
13597
13598                 if (sched_scan_req && notify->portid &&
13599                     sched_scan_req->owner_nlportid == notify->portid)
13600                         schedule_scan_stop = true;
13601
13602                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13603                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13604
13605                         if (wdev->owner_nlportid == notify->portid)
13606                                 schedule_destroy_work = true;
13607                 }
13608
13609                 spin_lock_bh(&rdev->beacon_registrations_lock);
13610                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13611                                          list) {
13612                         if (reg->nlportid == notify->portid) {
13613                                 list_del(&reg->list);
13614                                 kfree(reg);
13615                                 break;
13616                         }
13617                 }
13618                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13619
13620                 if (schedule_destroy_work) {
13621                         struct cfg80211_iface_destroy *destroy;
13622
13623                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13624                         if (destroy) {
13625                                 destroy->nlportid = notify->portid;
13626                                 spin_lock(&rdev->destroy_list_lock);
13627                                 list_add(&destroy->list, &rdev->destroy_list);
13628                                 spin_unlock(&rdev->destroy_list_lock);
13629                                 schedule_work(&rdev->destroy_work);
13630                         }
13631                 } else if (schedule_scan_stop) {
13632                         sched_scan_req->owner_nlportid = 0;
13633
13634                         if (rdev->ops->sched_scan_stop &&
13635                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13636                                 schedule_work(&rdev->sched_scan_stop_wk);
13637                 }
13638         }
13639
13640         rcu_read_unlock();
13641
13642         /*
13643          * It is possible that the user space process that is controlling the
13644          * indoor setting disappeared, so notify the regulatory core.
13645          */
13646         regulatory_netlink_notify(notify->portid);
13647         return NOTIFY_OK;
13648 }
13649
13650 static struct notifier_block nl80211_netlink_notifier = {
13651         .notifier_call = nl80211_netlink_notify,
13652 };
13653
13654 void cfg80211_ft_event(struct net_device *netdev,
13655                        struct cfg80211_ft_event_params *ft_event)
13656 {
13657         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13658         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13659         struct sk_buff *msg;
13660         void *hdr;
13661
13662         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13663
13664         if (!ft_event->target_ap)
13665                 return;
13666
13667         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13668         if (!msg)
13669                 return;
13670
13671         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13672         if (!hdr)
13673                 goto out;
13674
13675         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13676             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13677             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13678                 goto out;
13679
13680         if (ft_event->ies &&
13681             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13682                 goto out;
13683         if (ft_event->ric_ies &&
13684             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13685                     ft_event->ric_ies))
13686                 goto out;
13687
13688         genlmsg_end(msg, hdr);
13689
13690         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13691                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13692         return;
13693  out:
13694         nlmsg_free(msg);
13695 }
13696 EXPORT_SYMBOL(cfg80211_ft_event);
13697
13698 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13699 {
13700         struct cfg80211_registered_device *rdev;
13701         struct sk_buff *msg;
13702         void *hdr;
13703         u32 nlportid;
13704
13705         rdev = wiphy_to_rdev(wdev->wiphy);
13706         if (!rdev->crit_proto_nlportid)
13707                 return;
13708
13709         nlportid = rdev->crit_proto_nlportid;
13710         rdev->crit_proto_nlportid = 0;
13711
13712         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13713         if (!msg)
13714                 return;
13715
13716         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13717         if (!hdr)
13718                 goto nla_put_failure;
13719
13720         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13721             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13722                               NL80211_ATTR_PAD))
13723                 goto nla_put_failure;
13724
13725         genlmsg_end(msg, hdr);
13726
13727         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13728         return;
13729
13730  nla_put_failure:
13731         if (hdr)
13732                 genlmsg_cancel(msg, hdr);
13733         nlmsg_free(msg);
13734 }
13735 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13736
13737 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13738 {
13739         struct wiphy *wiphy = wdev->wiphy;
13740         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13741         struct sk_buff *msg;
13742         void *hdr;
13743
13744         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13745         if (!msg)
13746                 return;
13747
13748         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13749         if (!hdr)
13750                 goto out;
13751
13752         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13753             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13754             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13755                               NL80211_ATTR_PAD))
13756                 goto out;
13757
13758         genlmsg_end(msg, hdr);
13759
13760         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13761                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13762         return;
13763  out:
13764         nlmsg_free(msg);
13765 }
13766
13767 /* initialisation/exit functions */
13768
13769 int nl80211_init(void)
13770 {
13771         int err;
13772
13773         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13774                                                    nl80211_mcgrps);
13775         if (err)
13776                 return err;
13777
13778         err = netlink_register_notifier(&nl80211_netlink_notifier);
13779         if (err)
13780                 goto err_out;
13781
13782         return 0;
13783  err_out:
13784         genl_unregister_family(&nl80211_fam);
13785         return err;
13786 }
13787
13788 void nl80211_exit(void)
13789 {
13790         netlink_unregister_notifier(&nl80211_netlink_notifier);
13791         genl_unregister_family(&nl80211_fam);
13792 }