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, *event;
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         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2859         if (event) {
2860                 if (nl80211_send_iface(event, 0, 0, 0,
2861                                        rdev, wdev, false) < 0) {
2862                         nlmsg_free(event);
2863                         goto out;
2864                 }
2865
2866                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2867                                         event, 0, NL80211_MCGRP_CONFIG,
2868                                         GFP_KERNEL);
2869         }
2870
2871 out:
2872         return genlmsg_reply(msg, info);
2873 }
2874
2875 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2876 {
2877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2878         struct wireless_dev *wdev = info->user_ptr[1];
2879         struct sk_buff *msg;
2880         int status;
2881
2882         if (!rdev->ops->del_virtual_intf)
2883                 return -EOPNOTSUPP;
2884
2885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2886         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2887                 nlmsg_free(msg);
2888                 msg = NULL;
2889         }
2890
2891         /*
2892          * If we remove a wireless device without a netdev then clear
2893          * user_ptr[1] so that nl80211_post_doit won't dereference it
2894          * to check if it needs to do dev_put(). Otherwise it crashes
2895          * since the wdev has been freed, unlike with a netdev where
2896          * we need the dev_put() for the netdev to really be freed.
2897          */
2898         if (!wdev->netdev)
2899                 info->user_ptr[1] = NULL;
2900
2901         status = rdev_del_virtual_intf(rdev, wdev);
2902         if (status >= 0 && msg)
2903                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2904                                         msg, 0, NL80211_MCGRP_CONFIG,
2905                                         GFP_KERNEL);
2906         else
2907                 nlmsg_free(msg);
2908
2909         return status;
2910 }
2911
2912 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2913 {
2914         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2915         struct net_device *dev = info->user_ptr[1];
2916         u16 noack_map;
2917
2918         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2919                 return -EINVAL;
2920
2921         if (!rdev->ops->set_noack_map)
2922                 return -EOPNOTSUPP;
2923
2924         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2925
2926         return rdev_set_noack_map(rdev, dev, noack_map);
2927 }
2928
2929 struct get_key_cookie {
2930         struct sk_buff *msg;
2931         int error;
2932         int idx;
2933 };
2934
2935 static void get_key_callback(void *c, struct key_params *params)
2936 {
2937         struct nlattr *key;
2938         struct get_key_cookie *cookie = c;
2939
2940         if ((params->key &&
2941              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2942                      params->key_len, params->key)) ||
2943             (params->seq &&
2944              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2945                      params->seq_len, params->seq)) ||
2946             (params->cipher &&
2947              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2948                          params->cipher)))
2949                 goto nla_put_failure;
2950
2951         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2952         if (!key)
2953                 goto nla_put_failure;
2954
2955         if ((params->key &&
2956              nla_put(cookie->msg, NL80211_KEY_DATA,
2957                      params->key_len, params->key)) ||
2958             (params->seq &&
2959              nla_put(cookie->msg, NL80211_KEY_SEQ,
2960                      params->seq_len, params->seq)) ||
2961             (params->cipher &&
2962              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2963                          params->cipher)))
2964                 goto nla_put_failure;
2965
2966         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2967                 goto nla_put_failure;
2968
2969         nla_nest_end(cookie->msg, key);
2970
2971         return;
2972  nla_put_failure:
2973         cookie->error = 1;
2974 }
2975
2976 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2977 {
2978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2979         int err;
2980         struct net_device *dev = info->user_ptr[1];
2981         u8 key_idx = 0;
2982         const u8 *mac_addr = NULL;
2983         bool pairwise;
2984         struct get_key_cookie cookie = {
2985                 .error = 0,
2986         };
2987         void *hdr;
2988         struct sk_buff *msg;
2989
2990         if (info->attrs[NL80211_ATTR_KEY_IDX])
2991                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2992
2993         if (key_idx > 5)
2994                 return -EINVAL;
2995
2996         if (info->attrs[NL80211_ATTR_MAC])
2997                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2998
2999         pairwise = !!mac_addr;
3000         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3001                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3002
3003                 if (kt >= NUM_NL80211_KEYTYPES)
3004                         return -EINVAL;
3005                 if (kt != NL80211_KEYTYPE_GROUP &&
3006                     kt != NL80211_KEYTYPE_PAIRWISE)
3007                         return -EINVAL;
3008                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3009         }
3010
3011         if (!rdev->ops->get_key)
3012                 return -EOPNOTSUPP;
3013
3014         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3015                 return -ENOENT;
3016
3017         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3018         if (!msg)
3019                 return -ENOMEM;
3020
3021         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3022                              NL80211_CMD_NEW_KEY);
3023         if (!hdr)
3024                 goto nla_put_failure;
3025
3026         cookie.msg = msg;
3027         cookie.idx = key_idx;
3028
3029         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3030             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3031                 goto nla_put_failure;
3032         if (mac_addr &&
3033             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3034                 goto nla_put_failure;
3035
3036         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3037                            get_key_callback);
3038
3039         if (err)
3040                 goto free_msg;
3041
3042         if (cookie.error)
3043                 goto nla_put_failure;
3044
3045         genlmsg_end(msg, hdr);
3046         return genlmsg_reply(msg, info);
3047
3048  nla_put_failure:
3049         err = -ENOBUFS;
3050  free_msg:
3051         nlmsg_free(msg);
3052         return err;
3053 }
3054
3055 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3056 {
3057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3058         struct key_parse key;
3059         int err;
3060         struct net_device *dev = info->user_ptr[1];
3061
3062         err = nl80211_parse_key(info, &key);
3063         if (err)
3064                 return err;
3065
3066         if (key.idx < 0)
3067                 return -EINVAL;
3068
3069         /* only support setting default key */
3070         if (!key.def && !key.defmgmt)
3071                 return -EINVAL;
3072
3073         wdev_lock(dev->ieee80211_ptr);
3074
3075         if (key.def) {
3076                 if (!rdev->ops->set_default_key) {
3077                         err = -EOPNOTSUPP;
3078                         goto out;
3079                 }
3080
3081                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3082                 if (err)
3083                         goto out;
3084
3085                 err = rdev_set_default_key(rdev, dev, key.idx,
3086                                                  key.def_uni, key.def_multi);
3087
3088                 if (err)
3089                         goto out;
3090
3091 #ifdef CONFIG_CFG80211_WEXT
3092                 dev->ieee80211_ptr->wext.default_key = key.idx;
3093 #endif
3094         } else {
3095                 if (key.def_uni || !key.def_multi) {
3096                         err = -EINVAL;
3097                         goto out;
3098                 }
3099
3100                 if (!rdev->ops->set_default_mgmt_key) {
3101                         err = -EOPNOTSUPP;
3102                         goto out;
3103                 }
3104
3105                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3106                 if (err)
3107                         goto out;
3108
3109                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3110                 if (err)
3111                         goto out;
3112
3113 #ifdef CONFIG_CFG80211_WEXT
3114                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3115 #endif
3116         }
3117
3118  out:
3119         wdev_unlock(dev->ieee80211_ptr);
3120
3121         return err;
3122 }
3123
3124 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3125 {
3126         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3127         int err;
3128         struct net_device *dev = info->user_ptr[1];
3129         struct key_parse key;
3130         const u8 *mac_addr = NULL;
3131
3132         err = nl80211_parse_key(info, &key);
3133         if (err)
3134                 return err;
3135
3136         if (!key.p.key)
3137                 return -EINVAL;
3138
3139         if (info->attrs[NL80211_ATTR_MAC])
3140                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3141
3142         if (key.type == -1) {
3143                 if (mac_addr)
3144                         key.type = NL80211_KEYTYPE_PAIRWISE;
3145                 else
3146                         key.type = NL80211_KEYTYPE_GROUP;
3147         }
3148
3149         /* for now */
3150         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3151             key.type != NL80211_KEYTYPE_GROUP)
3152                 return -EINVAL;
3153
3154         if (!rdev->ops->add_key)
3155                 return -EOPNOTSUPP;
3156
3157         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3158                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3159                                            mac_addr))
3160                 return -EINVAL;
3161
3162         wdev_lock(dev->ieee80211_ptr);
3163         err = nl80211_key_allowed(dev->ieee80211_ptr);
3164         if (!err)
3165                 err = rdev_add_key(rdev, dev, key.idx,
3166                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3167                                     mac_addr, &key.p);
3168         wdev_unlock(dev->ieee80211_ptr);
3169
3170         return err;
3171 }
3172
3173 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3174 {
3175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3176         int err;
3177         struct net_device *dev = info->user_ptr[1];
3178         u8 *mac_addr = NULL;
3179         struct key_parse key;
3180
3181         err = nl80211_parse_key(info, &key);
3182         if (err)
3183                 return err;
3184
3185         if (info->attrs[NL80211_ATTR_MAC])
3186                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3187
3188         if (key.type == -1) {
3189                 if (mac_addr)
3190                         key.type = NL80211_KEYTYPE_PAIRWISE;
3191                 else
3192                         key.type = NL80211_KEYTYPE_GROUP;
3193         }
3194
3195         /* for now */
3196         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3197             key.type != NL80211_KEYTYPE_GROUP)
3198                 return -EINVAL;
3199
3200         if (!rdev->ops->del_key)
3201                 return -EOPNOTSUPP;
3202
3203         wdev_lock(dev->ieee80211_ptr);
3204         err = nl80211_key_allowed(dev->ieee80211_ptr);
3205
3206         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3207             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3208                 err = -ENOENT;
3209
3210         if (!err)
3211                 err = rdev_del_key(rdev, dev, key.idx,
3212                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3213                                    mac_addr);
3214
3215 #ifdef CONFIG_CFG80211_WEXT
3216         if (!err) {
3217                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3218                         dev->ieee80211_ptr->wext.default_key = -1;
3219                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3220                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3221         }
3222 #endif
3223         wdev_unlock(dev->ieee80211_ptr);
3224
3225         return err;
3226 }
3227
3228 /* This function returns an error or the number of nested attributes */
3229 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3230 {
3231         struct nlattr *attr;
3232         int n_entries = 0, tmp;
3233
3234         nla_for_each_nested(attr, nl_attr, tmp) {
3235                 if (nla_len(attr) != ETH_ALEN)
3236                         return -EINVAL;
3237
3238                 n_entries++;
3239         }
3240
3241         return n_entries;
3242 }
3243
3244 /*
3245  * This function parses ACL information and allocates memory for ACL data.
3246  * On successful return, the calling function is responsible to free the
3247  * ACL buffer returned by this function.
3248  */
3249 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3250                                                 struct genl_info *info)
3251 {
3252         enum nl80211_acl_policy acl_policy;
3253         struct nlattr *attr;
3254         struct cfg80211_acl_data *acl;
3255         int i = 0, n_entries, tmp;
3256
3257         if (!wiphy->max_acl_mac_addrs)
3258                 return ERR_PTR(-EOPNOTSUPP);
3259
3260         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3261                 return ERR_PTR(-EINVAL);
3262
3263         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3264         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3265             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3266                 return ERR_PTR(-EINVAL);
3267
3268         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3269                 return ERR_PTR(-EINVAL);
3270
3271         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3272         if (n_entries < 0)
3273                 return ERR_PTR(n_entries);
3274
3275         if (n_entries > wiphy->max_acl_mac_addrs)
3276                 return ERR_PTR(-ENOTSUPP);
3277
3278         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3279                       GFP_KERNEL);
3280         if (!acl)
3281                 return ERR_PTR(-ENOMEM);
3282
3283         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3284                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3285                 i++;
3286         }
3287
3288         acl->n_acl_entries = n_entries;
3289         acl->acl_policy = acl_policy;
3290
3291         return acl;
3292 }
3293
3294 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3295 {
3296         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3297         struct net_device *dev = info->user_ptr[1];
3298         struct cfg80211_acl_data *acl;
3299         int err;
3300
3301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3303                 return -EOPNOTSUPP;
3304
3305         if (!dev->ieee80211_ptr->beacon_interval)
3306                 return -EINVAL;
3307
3308         acl = parse_acl_data(&rdev->wiphy, info);
3309         if (IS_ERR(acl))
3310                 return PTR_ERR(acl);
3311
3312         err = rdev_set_mac_acl(rdev, dev, acl);
3313
3314         kfree(acl);
3315
3316         return err;
3317 }
3318
3319 static int nl80211_parse_beacon(struct nlattr *attrs[],
3320                                 struct cfg80211_beacon_data *bcn)
3321 {
3322         bool haveinfo = false;
3323
3324         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3325             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3326             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3327             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3328                 return -EINVAL;
3329
3330         memset(bcn, 0, sizeof(*bcn));
3331
3332         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3333                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3334                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3335                 if (!bcn->head_len)
3336                         return -EINVAL;
3337                 haveinfo = true;
3338         }
3339
3340         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3341                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3342                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3343                 haveinfo = true;
3344         }
3345
3346         if (!haveinfo)
3347                 return -EINVAL;
3348
3349         if (attrs[NL80211_ATTR_IE]) {
3350                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3351                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3352         }
3353
3354         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3355                 bcn->proberesp_ies =
3356                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3357                 bcn->proberesp_ies_len =
3358                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3359         }
3360
3361         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3362                 bcn->assocresp_ies =
3363                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3364                 bcn->assocresp_ies_len =
3365                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3366         }
3367
3368         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3369                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3370                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3371         }
3372
3373         return 0;
3374 }
3375
3376 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3377                                    struct cfg80211_ap_settings *params)
3378 {
3379         struct wireless_dev *wdev;
3380         bool ret = false;
3381
3382         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3383                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3384                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3385                         continue;
3386
3387                 if (!wdev->preset_chandef.chan)
3388                         continue;
3389
3390                 params->chandef = wdev->preset_chandef;
3391                 ret = true;
3392                 break;
3393         }
3394
3395         return ret;
3396 }
3397
3398 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3399                                     enum nl80211_auth_type auth_type,
3400                                     enum nl80211_commands cmd)
3401 {
3402         if (auth_type > NL80211_AUTHTYPE_MAX)
3403                 return false;
3404
3405         switch (cmd) {
3406         case NL80211_CMD_AUTHENTICATE:
3407                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3408                     auth_type == NL80211_AUTHTYPE_SAE)
3409                         return false;
3410                 return true;
3411         case NL80211_CMD_CONNECT:
3412         case NL80211_CMD_START_AP:
3413                 /* SAE not supported yet */
3414                 if (auth_type == NL80211_AUTHTYPE_SAE)
3415                         return false;
3416                 return true;
3417         default:
3418                 return false;
3419         }
3420 }
3421
3422 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3423 {
3424         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3425         struct net_device *dev = info->user_ptr[1];
3426         struct wireless_dev *wdev = dev->ieee80211_ptr;
3427         struct cfg80211_ap_settings params;
3428         int err;
3429
3430         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3431             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3432                 return -EOPNOTSUPP;
3433
3434         if (!rdev->ops->start_ap)
3435                 return -EOPNOTSUPP;
3436
3437         if (wdev->beacon_interval)
3438                 return -EALREADY;
3439
3440         memset(&params, 0, sizeof(params));
3441
3442         /* these are required for START_AP */
3443         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3444             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3445             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3446                 return -EINVAL;
3447
3448         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3449         if (err)
3450                 return err;
3451
3452         params.beacon_interval =
3453                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3454         params.dtim_period =
3455                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3456
3457         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3458         if (err)
3459                 return err;
3460
3461         /*
3462          * In theory, some of these attributes should be required here
3463          * but since they were not used when the command was originally
3464          * added, keep them optional for old user space programs to let
3465          * them continue to work with drivers that do not need the
3466          * additional information -- drivers must check!
3467          */
3468         if (info->attrs[NL80211_ATTR_SSID]) {
3469                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3470                 params.ssid_len =
3471                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3472                 if (params.ssid_len == 0 ||
3473                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3474                         return -EINVAL;
3475         }
3476
3477         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3478                 params.hidden_ssid = nla_get_u32(
3479                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3480                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3481                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3482                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3483                         return -EINVAL;
3484         }
3485
3486         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3487
3488         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3489                 params.auth_type = nla_get_u32(
3490                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3491                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3492                                              NL80211_CMD_START_AP))
3493                         return -EINVAL;
3494         } else
3495                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3496
3497         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3498                                       NL80211_MAX_NR_CIPHER_SUITES);
3499         if (err)
3500                 return err;
3501
3502         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3503                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3504                         return -EOPNOTSUPP;
3505                 params.inactivity_timeout = nla_get_u16(
3506                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3507         }
3508
3509         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3510                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3511                         return -EINVAL;
3512                 params.p2p_ctwindow =
3513                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3514                 if (params.p2p_ctwindow > 127)
3515                         return -EINVAL;
3516                 if (params.p2p_ctwindow != 0 &&
3517                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3518                         return -EINVAL;
3519         }
3520
3521         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3522                 u8 tmp;
3523
3524                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3525                         return -EINVAL;
3526                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3527                 if (tmp > 1)
3528                         return -EINVAL;
3529                 params.p2p_opp_ps = tmp;
3530                 if (params.p2p_opp_ps != 0 &&
3531                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3532                         return -EINVAL;
3533         }
3534
3535         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3536                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3537                 if (err)
3538                         return err;
3539         } else if (wdev->preset_chandef.chan) {
3540                 params.chandef = wdev->preset_chandef;
3541         } else if (!nl80211_get_ap_channel(rdev, &params))
3542                 return -EINVAL;
3543
3544         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3545                                            wdev->iftype))
3546                 return -EINVAL;
3547
3548         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3549                 params.smps_mode =
3550                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3551                 switch (params.smps_mode) {
3552                 case NL80211_SMPS_OFF:
3553                         break;
3554                 case NL80211_SMPS_STATIC:
3555                         if (!(rdev->wiphy.features &
3556                               NL80211_FEATURE_STATIC_SMPS))
3557                                 return -EINVAL;
3558                         break;
3559                 case NL80211_SMPS_DYNAMIC:
3560                         if (!(rdev->wiphy.features &
3561                               NL80211_FEATURE_DYNAMIC_SMPS))
3562                                 return -EINVAL;
3563                         break;
3564                 default:
3565                         return -EINVAL;
3566                 }
3567         } else {
3568                 params.smps_mode = NL80211_SMPS_OFF;
3569         }
3570
3571         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3572         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3573                 return -EOPNOTSUPP;
3574
3575         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3576                 params.acl = parse_acl_data(&rdev->wiphy, info);
3577                 if (IS_ERR(params.acl))
3578                         return PTR_ERR(params.acl);
3579         }
3580
3581         wdev_lock(wdev);
3582         err = rdev_start_ap(rdev, dev, &params);
3583         if (!err) {
3584                 wdev->preset_chandef = params.chandef;
3585                 wdev->beacon_interval = params.beacon_interval;
3586                 wdev->chandef = params.chandef;
3587                 wdev->ssid_len = params.ssid_len;
3588                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3589         }
3590         wdev_unlock(wdev);
3591
3592         kfree(params.acl);
3593
3594         return err;
3595 }
3596
3597 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3598 {
3599         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3600         struct net_device *dev = info->user_ptr[1];
3601         struct wireless_dev *wdev = dev->ieee80211_ptr;
3602         struct cfg80211_beacon_data params;
3603         int err;
3604
3605         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3606             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3607                 return -EOPNOTSUPP;
3608
3609         if (!rdev->ops->change_beacon)
3610                 return -EOPNOTSUPP;
3611
3612         if (!wdev->beacon_interval)
3613                 return -EINVAL;
3614
3615         err = nl80211_parse_beacon(info->attrs, &params);
3616         if (err)
3617                 return err;
3618
3619         wdev_lock(wdev);
3620         err = rdev_change_beacon(rdev, dev, &params);
3621         wdev_unlock(wdev);
3622
3623         return err;
3624 }
3625
3626 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3627 {
3628         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3629         struct net_device *dev = info->user_ptr[1];
3630
3631         return cfg80211_stop_ap(rdev, dev, false);
3632 }
3633
3634 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3635         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3636         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3637         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3638         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3639         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3640         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3641 };
3642
3643 static int parse_station_flags(struct genl_info *info,
3644                                enum nl80211_iftype iftype,
3645                                struct station_parameters *params)
3646 {
3647         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3648         struct nlattr *nla;
3649         int flag;
3650
3651         /*
3652          * Try parsing the new attribute first so userspace
3653          * can specify both for older kernels.
3654          */
3655         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3656         if (nla) {
3657                 struct nl80211_sta_flag_update *sta_flags;
3658
3659                 sta_flags = nla_data(nla);
3660                 params->sta_flags_mask = sta_flags->mask;
3661                 params->sta_flags_set = sta_flags->set;
3662                 params->sta_flags_set &= params->sta_flags_mask;
3663                 if ((params->sta_flags_mask |
3664                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3665                         return -EINVAL;
3666                 return 0;
3667         }
3668
3669         /* if present, parse the old attribute */
3670
3671         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3672         if (!nla)
3673                 return 0;
3674
3675         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3676                              nla, sta_flags_policy))
3677                 return -EINVAL;
3678
3679         /*
3680          * Only allow certain flags for interface types so that
3681          * other attributes are silently ignored. Remember that
3682          * this is backward compatibility code with old userspace
3683          * and shouldn't be hit in other cases anyway.
3684          */
3685         switch (iftype) {
3686         case NL80211_IFTYPE_AP:
3687         case NL80211_IFTYPE_AP_VLAN:
3688         case NL80211_IFTYPE_P2P_GO:
3689                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3690                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3691                                          BIT(NL80211_STA_FLAG_WME) |
3692                                          BIT(NL80211_STA_FLAG_MFP);
3693                 break;
3694         case NL80211_IFTYPE_P2P_CLIENT:
3695         case NL80211_IFTYPE_STATION:
3696                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3697                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3698                 break;
3699         case NL80211_IFTYPE_MESH_POINT:
3700                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3701                                          BIT(NL80211_STA_FLAG_MFP) |
3702                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3703         default:
3704                 return -EINVAL;
3705         }
3706
3707         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3708                 if (flags[flag]) {
3709                         params->sta_flags_set |= (1<<flag);
3710
3711                         /* no longer support new API additions in old API */
3712                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3713                                 return -EINVAL;
3714                 }
3715         }
3716
3717         return 0;
3718 }
3719
3720 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3721                                  int attr)
3722 {
3723         struct nlattr *rate;
3724         u32 bitrate;
3725         u16 bitrate_compat;
3726         enum nl80211_attrs rate_flg;
3727
3728         rate = nla_nest_start(msg, attr);
3729         if (!rate)
3730                 return false;
3731
3732         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3733         bitrate = cfg80211_calculate_bitrate(info);
3734         /* report 16-bit bitrate only if we can */
3735         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3736         if (bitrate > 0 &&
3737             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3738                 return false;
3739         if (bitrate_compat > 0 &&
3740             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3741                 return false;
3742
3743         switch (info->bw) {
3744         case RATE_INFO_BW_5:
3745                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3746                 break;
3747         case RATE_INFO_BW_10:
3748                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3749                 break;
3750         default:
3751                 WARN_ON(1);
3752                 /* fall through */
3753         case RATE_INFO_BW_20:
3754                 rate_flg = 0;
3755                 break;
3756         case RATE_INFO_BW_40:
3757                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3758                 break;
3759         case RATE_INFO_BW_80:
3760                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3761                 break;
3762         case RATE_INFO_BW_160:
3763                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3764                 break;
3765         }
3766
3767         if (rate_flg && nla_put_flag(msg, rate_flg))
3768                 return false;
3769
3770         if (info->flags & RATE_INFO_FLAGS_MCS) {
3771                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3772                         return false;
3773                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3774                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3775                         return false;
3776         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3777                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3778                         return false;
3779                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3780                         return false;
3781                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3782                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3783                         return false;
3784         }
3785
3786         nla_nest_end(msg, rate);
3787         return true;
3788 }
3789
3790 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3791                                int id)
3792 {
3793         void *attr;
3794         int i = 0;
3795
3796         if (!mask)
3797                 return true;
3798
3799         attr = nla_nest_start(msg, id);
3800         if (!attr)
3801                 return false;
3802
3803         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3804                 if (!(mask & BIT(i)))
3805                         continue;
3806
3807                 if (nla_put_u8(msg, i, signal[i]))
3808                         return false;
3809         }
3810
3811         nla_nest_end(msg, attr);
3812
3813         return true;
3814 }
3815
3816 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3817                                 u32 seq, int flags,
3818                                 struct cfg80211_registered_device *rdev,
3819                                 struct net_device *dev,
3820                                 const u8 *mac_addr, struct station_info *sinfo)
3821 {
3822         void *hdr;
3823         struct nlattr *sinfoattr, *bss_param;
3824
3825         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3826         if (!hdr)
3827                 return -1;
3828
3829         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3830             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3831             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3832                 goto nla_put_failure;
3833
3834         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3835         if (!sinfoattr)
3836                 goto nla_put_failure;
3837
3838 #define PUT_SINFO(attr, memb, type) do {                                \
3839         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3840         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3841             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3842                              sinfo->memb))                              \
3843                 goto nla_put_failure;                                   \
3844         } while (0)
3845 #define PUT_SINFO_U64(attr, memb) do {                                  \
3846         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3847             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3848                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3849                 goto nla_put_failure;                                   \
3850         } while (0)
3851
3852         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3853         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3854
3855         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3856                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3857             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3858                         (u32)sinfo->rx_bytes))
3859                 goto nla_put_failure;
3860
3861         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3862                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3863             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3864                         (u32)sinfo->tx_bytes))
3865                 goto nla_put_failure;
3866
3867         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3868         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3869         PUT_SINFO(LLID, llid, u16);
3870         PUT_SINFO(PLID, plid, u16);
3871         PUT_SINFO(PLINK_STATE, plink_state, u8);
3872         PUT_SINFO_U64(RX_DURATION, rx_duration);
3873
3874         switch (rdev->wiphy.signal_type) {
3875         case CFG80211_SIGNAL_TYPE_MBM:
3876                 PUT_SINFO(SIGNAL, signal, u8);
3877                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3878                 break;
3879         default:
3880                 break;
3881         }
3882         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3883                 if (!nl80211_put_signal(msg, sinfo->chains,
3884                                         sinfo->chain_signal,
3885                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3886                         goto nla_put_failure;
3887         }
3888         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3889                 if (!nl80211_put_signal(msg, sinfo->chains,
3890                                         sinfo->chain_signal_avg,
3891                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3892                         goto nla_put_failure;
3893         }
3894         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3895                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3896                                           NL80211_STA_INFO_TX_BITRATE))
3897                         goto nla_put_failure;
3898         }
3899         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3900                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3901                                           NL80211_STA_INFO_RX_BITRATE))
3902                         goto nla_put_failure;
3903         }
3904
3905         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3906         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3907         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3908         PUT_SINFO(TX_FAILED, tx_failed, u32);
3909         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3910         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3911         PUT_SINFO(LOCAL_PM, local_pm, u32);
3912         PUT_SINFO(PEER_PM, peer_pm, u32);
3913         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3914
3915         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3916                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3917                 if (!bss_param)
3918                         goto nla_put_failure;
3919
3920                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3921                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3922                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3923                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3924                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3925                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3926                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3927                                sinfo->bss_param.dtim_period) ||
3928                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3929                                 sinfo->bss_param.beacon_interval))
3930                         goto nla_put_failure;
3931
3932                 nla_nest_end(msg, bss_param);
3933         }
3934         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3935             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3936                     sizeof(struct nl80211_sta_flag_update),
3937                     &sinfo->sta_flags))
3938                 goto nla_put_failure;
3939
3940         PUT_SINFO_U64(T_OFFSET, t_offset);
3941         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3942         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3943         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3944
3945 #undef PUT_SINFO
3946 #undef PUT_SINFO_U64
3947
3948         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3949                 struct nlattr *tidsattr;
3950                 int tid;
3951
3952                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3953                 if (!tidsattr)
3954                         goto nla_put_failure;
3955
3956                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3957                         struct cfg80211_tid_stats *tidstats;
3958                         struct nlattr *tidattr;
3959
3960                         tidstats = &sinfo->pertid[tid];
3961
3962                         if (!tidstats->filled)
3963                                 continue;
3964
3965                         tidattr = nla_nest_start(msg, tid + 1);
3966                         if (!tidattr)
3967                                 goto nla_put_failure;
3968
3969 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3970         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3971             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3972                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3973                 goto nla_put_failure;                                   \
3974         } while (0)
3975
3976                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3977                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3978                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3979                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3980
3981 #undef PUT_TIDVAL_U64
3982                         nla_nest_end(msg, tidattr);
3983                 }
3984
3985                 nla_nest_end(msg, tidsattr);
3986         }
3987
3988         nla_nest_end(msg, sinfoattr);
3989
3990         if (sinfo->assoc_req_ies_len &&
3991             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3992                     sinfo->assoc_req_ies))
3993                 goto nla_put_failure;
3994
3995         genlmsg_end(msg, hdr);
3996         return 0;
3997
3998  nla_put_failure:
3999         genlmsg_cancel(msg, hdr);
4000         return -EMSGSIZE;
4001 }
4002
4003 static int nl80211_dump_station(struct sk_buff *skb,
4004                                 struct netlink_callback *cb)
4005 {
4006         struct station_info sinfo;
4007         struct cfg80211_registered_device *rdev;
4008         struct wireless_dev *wdev;
4009         u8 mac_addr[ETH_ALEN];
4010         int sta_idx = cb->args[2];
4011         int err;
4012
4013         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4014         if (err)
4015                 return err;
4016
4017         if (!wdev->netdev) {
4018                 err = -EINVAL;
4019                 goto out_err;
4020         }
4021
4022         if (!rdev->ops->dump_station) {
4023                 err = -EOPNOTSUPP;
4024                 goto out_err;
4025         }
4026
4027         while (1) {
4028                 memset(&sinfo, 0, sizeof(sinfo));
4029                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4030                                         mac_addr, &sinfo);
4031                 if (err == -ENOENT)
4032                         break;
4033                 if (err)
4034                         goto out_err;
4035
4036                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4037                                 NETLINK_CB(cb->skb).portid,
4038                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4039                                 rdev, wdev->netdev, mac_addr,
4040                                 &sinfo) < 0)
4041                         goto out;
4042
4043                 sta_idx++;
4044         }
4045
4046  out:
4047         cb->args[2] = sta_idx;
4048         err = skb->len;
4049  out_err:
4050         nl80211_finish_wdev_dump(rdev);
4051
4052         return err;
4053 }
4054
4055 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4056 {
4057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4058         struct net_device *dev = info->user_ptr[1];
4059         struct station_info sinfo;
4060         struct sk_buff *msg;
4061         u8 *mac_addr = NULL;
4062         int err;
4063
4064         memset(&sinfo, 0, sizeof(sinfo));
4065
4066         if (!info->attrs[NL80211_ATTR_MAC])
4067                 return -EINVAL;
4068
4069         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4070
4071         if (!rdev->ops->get_station)
4072                 return -EOPNOTSUPP;
4073
4074         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4075         if (err)
4076                 return err;
4077
4078         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4079         if (!msg)
4080                 return -ENOMEM;
4081
4082         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4083                                  info->snd_portid, info->snd_seq, 0,
4084                                  rdev, dev, mac_addr, &sinfo) < 0) {
4085                 nlmsg_free(msg);
4086                 return -ENOBUFS;
4087         }
4088
4089         return genlmsg_reply(msg, info);
4090 }
4091
4092 int cfg80211_check_station_change(struct wiphy *wiphy,
4093                                   struct station_parameters *params,
4094                                   enum cfg80211_station_type statype)
4095 {
4096         if (params->listen_interval != -1 &&
4097             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4098                 return -EINVAL;
4099
4100         if (params->support_p2p_ps != -1 &&
4101             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4102                 return -EINVAL;
4103
4104         if (params->aid &&
4105             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4106             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4107                 return -EINVAL;
4108
4109         /* When you run into this, adjust the code below for the new flag */
4110         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4111
4112         switch (statype) {
4113         case CFG80211_STA_MESH_PEER_KERNEL:
4114         case CFG80211_STA_MESH_PEER_USER:
4115                 /*
4116                  * No ignoring the TDLS flag here -- the userspace mesh
4117                  * code doesn't have the bug of including TDLS in the
4118                  * mask everywhere.
4119                  */
4120                 if (params->sta_flags_mask &
4121                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4122                                   BIT(NL80211_STA_FLAG_MFP) |
4123                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4124                         return -EINVAL;
4125                 break;
4126         case CFG80211_STA_TDLS_PEER_SETUP:
4127         case CFG80211_STA_TDLS_PEER_ACTIVE:
4128                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4129                         return -EINVAL;
4130                 /* ignore since it can't change */
4131                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4132                 break;
4133         default:
4134                 /* disallow mesh-specific things */
4135                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4136                         return -EINVAL;
4137                 if (params->local_pm)
4138                         return -EINVAL;
4139                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4140                         return -EINVAL;
4141         }
4142
4143         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4144             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4145                 /* TDLS can't be set, ... */
4146                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4147                         return -EINVAL;
4148                 /*
4149                  * ... but don't bother the driver with it. This works around
4150                  * a hostapd/wpa_supplicant issue -- it always includes the
4151                  * TLDS_PEER flag in the mask even for AP mode.
4152                  */
4153                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4154         }
4155
4156         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4157             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4158                 /* reject other things that can't change */
4159                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4160                         return -EINVAL;
4161                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4162                         return -EINVAL;
4163                 if (params->supported_rates)
4164                         return -EINVAL;
4165                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4166                         return -EINVAL;
4167         }
4168
4169         if (statype != CFG80211_STA_AP_CLIENT &&
4170             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4171                 if (params->vlan)
4172                         return -EINVAL;
4173         }
4174
4175         switch (statype) {
4176         case CFG80211_STA_AP_MLME_CLIENT:
4177                 /* Use this only for authorizing/unauthorizing a station */
4178                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4179                         return -EOPNOTSUPP;
4180                 break;
4181         case CFG80211_STA_AP_CLIENT:
4182         case CFG80211_STA_AP_CLIENT_UNASSOC:
4183                 /* accept only the listed bits */
4184                 if (params->sta_flags_mask &
4185                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4186                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4187                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4188                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4189                                   BIT(NL80211_STA_FLAG_WME) |
4190                                   BIT(NL80211_STA_FLAG_MFP)))
4191                         return -EINVAL;
4192
4193                 /* but authenticated/associated only if driver handles it */
4194                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4195                     params->sta_flags_mask &
4196                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4197                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4198                         return -EINVAL;
4199                 break;
4200         case CFG80211_STA_IBSS:
4201         case CFG80211_STA_AP_STA:
4202                 /* reject any changes other than AUTHORIZED */
4203                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4204                         return -EINVAL;
4205                 break;
4206         case CFG80211_STA_TDLS_PEER_SETUP:
4207                 /* reject any changes other than AUTHORIZED or WME */
4208                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4209                                                BIT(NL80211_STA_FLAG_WME)))
4210                         return -EINVAL;
4211                 /* force (at least) rates when authorizing */
4212                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4213                     !params->supported_rates)
4214                         return -EINVAL;
4215                 break;
4216         case CFG80211_STA_TDLS_PEER_ACTIVE:
4217                 /* reject any changes */
4218                 return -EINVAL;
4219         case CFG80211_STA_MESH_PEER_KERNEL:
4220                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4221                         return -EINVAL;
4222                 break;
4223         case CFG80211_STA_MESH_PEER_USER:
4224                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4225                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4226                         return -EINVAL;
4227                 break;
4228         }
4229
4230         return 0;
4231 }
4232 EXPORT_SYMBOL(cfg80211_check_station_change);
4233
4234 /*
4235  * Get vlan interface making sure it is running and on the right wiphy.
4236  */
4237 static struct net_device *get_vlan(struct genl_info *info,
4238                                    struct cfg80211_registered_device *rdev)
4239 {
4240         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4241         struct net_device *v;
4242         int ret;
4243
4244         if (!vlanattr)
4245                 return NULL;
4246
4247         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4248         if (!v)
4249                 return ERR_PTR(-ENODEV);
4250
4251         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4252                 ret = -EINVAL;
4253                 goto error;
4254         }
4255
4256         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4257             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4258             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4259                 ret = -EINVAL;
4260                 goto error;
4261         }
4262
4263         if (!netif_running(v)) {
4264                 ret = -ENETDOWN;
4265                 goto error;
4266         }
4267
4268         return v;
4269  error:
4270         dev_put(v);
4271         return ERR_PTR(ret);
4272 }
4273
4274 static const struct nla_policy
4275 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4276         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4277         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4278 };
4279
4280 static int nl80211_parse_sta_wme(struct genl_info *info,
4281                                  struct station_parameters *params)
4282 {
4283         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4284         struct nlattr *nla;
4285         int err;
4286
4287         /* parse WME attributes if present */
4288         if (!info->attrs[NL80211_ATTR_STA_WME])
4289                 return 0;
4290
4291         nla = info->attrs[NL80211_ATTR_STA_WME];
4292         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4293                                nl80211_sta_wme_policy);
4294         if (err)
4295                 return err;
4296
4297         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4298                 params->uapsd_queues = nla_get_u8(
4299                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4300         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4301                 return -EINVAL;
4302
4303         if (tb[NL80211_STA_WME_MAX_SP])
4304                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4305
4306         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4307                 return -EINVAL;
4308
4309         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4310
4311         return 0;
4312 }
4313
4314 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4315                                       struct station_parameters *params)
4316 {
4317         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4318                 params->supported_channels =
4319                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4320                 params->supported_channels_len =
4321                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4322                 /*
4323                  * Need to include at least one (first channel, number of
4324                  * channels) tuple for each subband, and must have proper
4325                  * tuples for the rest of the data as well.
4326                  */
4327                 if (params->supported_channels_len < 2)
4328                         return -EINVAL;
4329                 if (params->supported_channels_len % 2)
4330                         return -EINVAL;
4331         }
4332
4333         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4334                 params->supported_oper_classes =
4335                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4336                 params->supported_oper_classes_len =
4337                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4338                 /*
4339                  * The value of the Length field of the Supported Operating
4340                  * Classes element is between 2 and 253.
4341                  */
4342                 if (params->supported_oper_classes_len < 2 ||
4343                     params->supported_oper_classes_len > 253)
4344                         return -EINVAL;
4345         }
4346         return 0;
4347 }
4348
4349 static int nl80211_set_station_tdls(struct genl_info *info,
4350                                     struct station_parameters *params)
4351 {
4352         int err;
4353         /* Dummy STA entry gets updated once the peer capabilities are known */
4354         if (info->attrs[NL80211_ATTR_PEER_AID])
4355                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4356         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4357                 params->ht_capa =
4358                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4359         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4360                 params->vht_capa =
4361                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4362
4363         err = nl80211_parse_sta_channel_info(info, params);
4364         if (err)
4365                 return err;
4366
4367         return nl80211_parse_sta_wme(info, params);
4368 }
4369
4370 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4371 {
4372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4373         struct net_device *dev = info->user_ptr[1];
4374         struct station_parameters params;
4375         u8 *mac_addr;
4376         int err;
4377
4378         memset(&params, 0, sizeof(params));
4379
4380         if (!rdev->ops->change_station)
4381                 return -EOPNOTSUPP;
4382
4383         /*
4384          * AID and listen_interval properties can be set only for unassociated
4385          * station. Include these parameters here and will check them in
4386          * cfg80211_check_station_change().
4387          */
4388         if (info->attrs[NL80211_ATTR_STA_AID])
4389                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4390
4391         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4392                 params.listen_interval =
4393                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4394         else
4395                 params.listen_interval = -1;
4396
4397         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4398                 u8 tmp;
4399
4400                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4401                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4402                         return -EINVAL;
4403
4404                 params.support_p2p_ps = tmp;
4405         } else {
4406                 params.support_p2p_ps = -1;
4407         }
4408
4409         if (!info->attrs[NL80211_ATTR_MAC])
4410                 return -EINVAL;
4411
4412         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4413
4414         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4415                 params.supported_rates =
4416                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4417                 params.supported_rates_len =
4418                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4419         }
4420
4421         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4422                 params.capability =
4423                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4424                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4425         }
4426
4427         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4428                 params.ext_capab =
4429                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4430                 params.ext_capab_len =
4431                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4432         }
4433
4434         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4435                 return -EINVAL;
4436
4437         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4438                 params.plink_action =
4439                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4440                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4441                         return -EINVAL;
4442         }
4443
4444         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4445                 params.plink_state =
4446                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4447                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4448                         return -EINVAL;
4449                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4450                         params.peer_aid = nla_get_u16(
4451                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4452                         if (params.peer_aid > IEEE80211_MAX_AID)
4453                                 return -EINVAL;
4454                 }
4455                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4456         }
4457
4458         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4459                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4460                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4461
4462                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4463                     pm > NL80211_MESH_POWER_MAX)
4464                         return -EINVAL;
4465
4466                 params.local_pm = pm;
4467         }
4468
4469         /* Include parameters for TDLS peer (will check later) */
4470         err = nl80211_set_station_tdls(info, &params);
4471         if (err)
4472                 return err;
4473
4474         params.vlan = get_vlan(info, rdev);
4475         if (IS_ERR(params.vlan))
4476                 return PTR_ERR(params.vlan);
4477
4478         switch (dev->ieee80211_ptr->iftype) {
4479         case NL80211_IFTYPE_AP:
4480         case NL80211_IFTYPE_AP_VLAN:
4481         case NL80211_IFTYPE_P2P_GO:
4482         case NL80211_IFTYPE_P2P_CLIENT:
4483         case NL80211_IFTYPE_STATION:
4484         case NL80211_IFTYPE_ADHOC:
4485         case NL80211_IFTYPE_MESH_POINT:
4486                 break;
4487         default:
4488                 err = -EOPNOTSUPP;
4489                 goto out_put_vlan;
4490         }
4491
4492         /* driver will call cfg80211_check_station_change() */
4493         err = rdev_change_station(rdev, dev, mac_addr, &params);
4494
4495  out_put_vlan:
4496         if (params.vlan)
4497                 dev_put(params.vlan);
4498
4499         return err;
4500 }
4501
4502 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4503 {
4504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4505         int err;
4506         struct net_device *dev = info->user_ptr[1];
4507         struct station_parameters params;
4508         u8 *mac_addr = NULL;
4509         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4510                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4511
4512         memset(&params, 0, sizeof(params));
4513
4514         if (!rdev->ops->add_station)
4515                 return -EOPNOTSUPP;
4516
4517         if (!info->attrs[NL80211_ATTR_MAC])
4518                 return -EINVAL;
4519
4520         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4521                 return -EINVAL;
4522
4523         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4524                 return -EINVAL;
4525
4526         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4527             !info->attrs[NL80211_ATTR_PEER_AID])
4528                 return -EINVAL;
4529
4530         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4531         params.supported_rates =
4532                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4533         params.supported_rates_len =
4534                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4535         params.listen_interval =
4536                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4537
4538         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4539                 u8 tmp;
4540
4541                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4542                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4543                         return -EINVAL;
4544
4545                 params.support_p2p_ps = tmp;
4546         } else {
4547                 /*
4548                  * if not specified, assume it's supported for P2P GO interface,
4549                  * and is NOT supported for AP interface
4550                  */
4551                 params.support_p2p_ps =
4552                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4553         }
4554
4555         if (info->attrs[NL80211_ATTR_PEER_AID])
4556                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4557         else
4558                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4559         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4560                 return -EINVAL;
4561
4562         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4563                 params.capability =
4564                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4565                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4566         }
4567
4568         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4569                 params.ext_capab =
4570                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4571                 params.ext_capab_len =
4572                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4573         }
4574
4575         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4576                 params.ht_capa =
4577                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4578
4579         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4580                 params.vht_capa =
4581                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4582
4583         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4584                 params.opmode_notif_used = true;
4585                 params.opmode_notif =
4586                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4587         }
4588
4589         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4590                 params.plink_action =
4591                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4592                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4593                         return -EINVAL;
4594         }
4595
4596         err = nl80211_parse_sta_channel_info(info, &params);
4597         if (err)
4598                 return err;
4599
4600         err = nl80211_parse_sta_wme(info, &params);
4601         if (err)
4602                 return err;
4603
4604         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4605                 return -EINVAL;
4606
4607         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4608          * as userspace might just pass through the capabilities from the IEs
4609          * directly, rather than enforcing this restriction and returning an
4610          * error in this case.
4611          */
4612         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4613                 params.ht_capa = NULL;
4614                 params.vht_capa = NULL;
4615         }
4616
4617         /* When you run into this, adjust the code below for the new flag */
4618         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4619
4620         switch (dev->ieee80211_ptr->iftype) {
4621         case NL80211_IFTYPE_AP:
4622         case NL80211_IFTYPE_AP_VLAN:
4623         case NL80211_IFTYPE_P2P_GO:
4624                 /* ignore WME attributes if iface/sta is not capable */
4625                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4626                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4627                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4628
4629                 /* TDLS peers cannot be added */
4630                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4631                     info->attrs[NL80211_ATTR_PEER_AID])
4632                         return -EINVAL;
4633                 /* but don't bother the driver with it */
4634                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4635
4636                 /* allow authenticated/associated only if driver handles it */
4637                 if (!(rdev->wiphy.features &
4638                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4639                     params.sta_flags_mask & auth_assoc)
4640                         return -EINVAL;
4641
4642                 /* Older userspace, or userspace wanting to be compatible with
4643                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4644                  * and assoc flags in the mask, but assumes the station will be
4645                  * added as associated anyway since this was the required driver
4646                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4647                  * introduced.
4648                  * In order to not bother drivers with this quirk in the API
4649                  * set the flags in both the mask and set for new stations in
4650                  * this case.
4651                  */
4652                 if (!(params.sta_flags_mask & auth_assoc)) {
4653                         params.sta_flags_mask |= auth_assoc;
4654                         params.sta_flags_set |= auth_assoc;
4655                 }
4656
4657                 /* must be last in here for error handling */
4658                 params.vlan = get_vlan(info, rdev);
4659                 if (IS_ERR(params.vlan))
4660                         return PTR_ERR(params.vlan);
4661                 break;
4662         case NL80211_IFTYPE_MESH_POINT:
4663                 /* ignore uAPSD data */
4664                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4665
4666                 /* associated is disallowed */
4667                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4668                         return -EINVAL;
4669                 /* TDLS peers cannot be added */
4670                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4671                     info->attrs[NL80211_ATTR_PEER_AID])
4672                         return -EINVAL;
4673                 break;
4674         case NL80211_IFTYPE_STATION:
4675         case NL80211_IFTYPE_P2P_CLIENT:
4676                 /* ignore uAPSD data */
4677                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4678
4679                 /* these are disallowed */
4680                 if (params.sta_flags_mask &
4681                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4682                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4683                         return -EINVAL;
4684                 /* Only TDLS peers can be added */
4685                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4686                         return -EINVAL;
4687                 /* Can only add if TDLS ... */
4688                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4689                         return -EOPNOTSUPP;
4690                 /* ... with external setup is supported */
4691                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4692                         return -EOPNOTSUPP;
4693                 /*
4694                  * Older wpa_supplicant versions always mark the TDLS peer
4695                  * as authorized, but it shouldn't yet be.
4696                  */
4697                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4698                 break;
4699         default:
4700                 return -EOPNOTSUPP;
4701         }
4702
4703         /* be aware of params.vlan when changing code here */
4704
4705         err = rdev_add_station(rdev, dev, mac_addr, &params);
4706
4707         if (params.vlan)
4708                 dev_put(params.vlan);
4709         return err;
4710 }
4711
4712 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4713 {
4714         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4715         struct net_device *dev = info->user_ptr[1];
4716         struct station_del_parameters params;
4717
4718         memset(&params, 0, sizeof(params));
4719
4720         if (info->attrs[NL80211_ATTR_MAC])
4721                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4722
4723         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4724             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4725             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4726             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4727                 return -EINVAL;
4728
4729         if (!rdev->ops->del_station)
4730                 return -EOPNOTSUPP;
4731
4732         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4733                 params.subtype =
4734                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4735                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4736                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4737                         return -EINVAL;
4738         } else {
4739                 /* Default to Deauthentication frame */
4740                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4741         }
4742
4743         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4744                 params.reason_code =
4745                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4746                 if (params.reason_code == 0)
4747                         return -EINVAL; /* 0 is reserved */
4748         } else {
4749                 /* Default to reason code 2 */
4750                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4751         }
4752
4753         return rdev_del_station(rdev, dev, &params);
4754 }
4755
4756 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4757                                 int flags, struct net_device *dev,
4758                                 u8 *dst, u8 *next_hop,
4759                                 struct mpath_info *pinfo)
4760 {
4761         void *hdr;
4762         struct nlattr *pinfoattr;
4763
4764         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4765         if (!hdr)
4766                 return -1;
4767
4768         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4769             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4770             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4771             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4772                 goto nla_put_failure;
4773
4774         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4775         if (!pinfoattr)
4776                 goto nla_put_failure;
4777         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4778             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4779                         pinfo->frame_qlen))
4780                 goto nla_put_failure;
4781         if (((pinfo->filled & MPATH_INFO_SN) &&
4782              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4783             ((pinfo->filled & MPATH_INFO_METRIC) &&
4784              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4785                          pinfo->metric)) ||
4786             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4787              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4788                          pinfo->exptime)) ||
4789             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4790              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4791                         pinfo->flags)) ||
4792             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4793              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4794                          pinfo->discovery_timeout)) ||
4795             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4796              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4797                         pinfo->discovery_retries)))
4798                 goto nla_put_failure;
4799
4800         nla_nest_end(msg, pinfoattr);
4801
4802         genlmsg_end(msg, hdr);
4803         return 0;
4804
4805  nla_put_failure:
4806         genlmsg_cancel(msg, hdr);
4807         return -EMSGSIZE;
4808 }
4809
4810 static int nl80211_dump_mpath(struct sk_buff *skb,
4811                               struct netlink_callback *cb)
4812 {
4813         struct mpath_info pinfo;
4814         struct cfg80211_registered_device *rdev;
4815         struct wireless_dev *wdev;
4816         u8 dst[ETH_ALEN];
4817         u8 next_hop[ETH_ALEN];
4818         int path_idx = cb->args[2];
4819         int err;
4820
4821         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4822         if (err)
4823                 return err;
4824
4825         if (!rdev->ops->dump_mpath) {
4826                 err = -EOPNOTSUPP;
4827                 goto out_err;
4828         }
4829
4830         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4831                 err = -EOPNOTSUPP;
4832                 goto out_err;
4833         }
4834
4835         while (1) {
4836                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4837                                       next_hop, &pinfo);
4838                 if (err == -ENOENT)
4839                         break;
4840                 if (err)
4841                         goto out_err;
4842
4843                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4844                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4845                                        wdev->netdev, dst, next_hop,
4846                                        &pinfo) < 0)
4847                         goto out;
4848
4849                 path_idx++;
4850         }
4851
4852  out:
4853         cb->args[2] = path_idx;
4854         err = skb->len;
4855  out_err:
4856         nl80211_finish_wdev_dump(rdev);
4857         return err;
4858 }
4859
4860 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4861 {
4862         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4863         int err;
4864         struct net_device *dev = info->user_ptr[1];
4865         struct mpath_info pinfo;
4866         struct sk_buff *msg;
4867         u8 *dst = NULL;
4868         u8 next_hop[ETH_ALEN];
4869
4870         memset(&pinfo, 0, sizeof(pinfo));
4871
4872         if (!info->attrs[NL80211_ATTR_MAC])
4873                 return -EINVAL;
4874
4875         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4876
4877         if (!rdev->ops->get_mpath)
4878                 return -EOPNOTSUPP;
4879
4880         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4881                 return -EOPNOTSUPP;
4882
4883         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4884         if (err)
4885                 return err;
4886
4887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4888         if (!msg)
4889                 return -ENOMEM;
4890
4891         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4892                                  dev, dst, next_hop, &pinfo) < 0) {
4893                 nlmsg_free(msg);
4894                 return -ENOBUFS;
4895         }
4896
4897         return genlmsg_reply(msg, info);
4898 }
4899
4900 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4901 {
4902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4903         struct net_device *dev = info->user_ptr[1];
4904         u8 *dst = NULL;
4905         u8 *next_hop = NULL;
4906
4907         if (!info->attrs[NL80211_ATTR_MAC])
4908                 return -EINVAL;
4909
4910         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4911                 return -EINVAL;
4912
4913         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4914         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4915
4916         if (!rdev->ops->change_mpath)
4917                 return -EOPNOTSUPP;
4918
4919         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4920                 return -EOPNOTSUPP;
4921
4922         return rdev_change_mpath(rdev, dev, dst, next_hop);
4923 }
4924
4925 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4926 {
4927         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4928         struct net_device *dev = info->user_ptr[1];
4929         u8 *dst = NULL;
4930         u8 *next_hop = NULL;
4931
4932         if (!info->attrs[NL80211_ATTR_MAC])
4933                 return -EINVAL;
4934
4935         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4936                 return -EINVAL;
4937
4938         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4939         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4940
4941         if (!rdev->ops->add_mpath)
4942                 return -EOPNOTSUPP;
4943
4944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4945                 return -EOPNOTSUPP;
4946
4947         return rdev_add_mpath(rdev, dev, dst, next_hop);
4948 }
4949
4950 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4951 {
4952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4953         struct net_device *dev = info->user_ptr[1];
4954         u8 *dst = NULL;
4955
4956         if (info->attrs[NL80211_ATTR_MAC])
4957                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4958
4959         if (!rdev->ops->del_mpath)
4960                 return -EOPNOTSUPP;
4961
4962         return rdev_del_mpath(rdev, dev, dst);
4963 }
4964
4965 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4966 {
4967         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4968         int err;
4969         struct net_device *dev = info->user_ptr[1];
4970         struct mpath_info pinfo;
4971         struct sk_buff *msg;
4972         u8 *dst = NULL;
4973         u8 mpp[ETH_ALEN];
4974
4975         memset(&pinfo, 0, sizeof(pinfo));
4976
4977         if (!info->attrs[NL80211_ATTR_MAC])
4978                 return -EINVAL;
4979
4980         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4981
4982         if (!rdev->ops->get_mpp)
4983                 return -EOPNOTSUPP;
4984
4985         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4986                 return -EOPNOTSUPP;
4987
4988         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4989         if (err)
4990                 return err;
4991
4992         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4993         if (!msg)
4994                 return -ENOMEM;
4995
4996         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4997                                dev, dst, mpp, &pinfo) < 0) {
4998                 nlmsg_free(msg);
4999                 return -ENOBUFS;
5000         }
5001
5002         return genlmsg_reply(msg, info);
5003 }
5004
5005 static int nl80211_dump_mpp(struct sk_buff *skb,
5006                             struct netlink_callback *cb)
5007 {
5008         struct mpath_info pinfo;
5009         struct cfg80211_registered_device *rdev;
5010         struct wireless_dev *wdev;
5011         u8 dst[ETH_ALEN];
5012         u8 mpp[ETH_ALEN];
5013         int path_idx = cb->args[2];
5014         int err;
5015
5016         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5017         if (err)
5018                 return err;
5019
5020         if (!rdev->ops->dump_mpp) {
5021                 err = -EOPNOTSUPP;
5022                 goto out_err;
5023         }
5024
5025         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5026                 err = -EOPNOTSUPP;
5027                 goto out_err;
5028         }
5029
5030         while (1) {
5031                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5032                                     mpp, &pinfo);
5033                 if (err == -ENOENT)
5034                         break;
5035                 if (err)
5036                         goto out_err;
5037
5038                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5039                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5040                                        wdev->netdev, dst, mpp,
5041                                        &pinfo) < 0)
5042                         goto out;
5043
5044                 path_idx++;
5045         }
5046
5047  out:
5048         cb->args[2] = path_idx;
5049         err = skb->len;
5050  out_err:
5051         nl80211_finish_wdev_dump(rdev);
5052         return err;
5053 }
5054
5055 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5056 {
5057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5058         struct net_device *dev = info->user_ptr[1];
5059         struct wireless_dev *wdev = dev->ieee80211_ptr;
5060         struct bss_parameters params;
5061         int err;
5062
5063         memset(&params, 0, sizeof(params));
5064         /* default to not changing parameters */
5065         params.use_cts_prot = -1;
5066         params.use_short_preamble = -1;
5067         params.use_short_slot_time = -1;
5068         params.ap_isolate = -1;
5069         params.ht_opmode = -1;
5070         params.p2p_ctwindow = -1;
5071         params.p2p_opp_ps = -1;
5072
5073         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5074                 params.use_cts_prot =
5075                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5076         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5077                 params.use_short_preamble =
5078                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5079         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5080                 params.use_short_slot_time =
5081                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5082         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5083                 params.basic_rates =
5084                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5085                 params.basic_rates_len =
5086                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5087         }
5088         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5089                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5090         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5091                 params.ht_opmode =
5092                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5093
5094         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5095                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5096                         return -EINVAL;
5097                 params.p2p_ctwindow =
5098                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5099                 if (params.p2p_ctwindow < 0)
5100                         return -EINVAL;
5101                 if (params.p2p_ctwindow != 0 &&
5102                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5103                         return -EINVAL;
5104         }
5105
5106         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5107                 u8 tmp;
5108
5109                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5110                         return -EINVAL;
5111                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5112                 if (tmp > 1)
5113                         return -EINVAL;
5114                 params.p2p_opp_ps = tmp;
5115                 if (params.p2p_opp_ps &&
5116                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5117                         return -EINVAL;
5118         }
5119
5120         if (!rdev->ops->change_bss)
5121                 return -EOPNOTSUPP;
5122
5123         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5124             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5125                 return -EOPNOTSUPP;
5126
5127         wdev_lock(wdev);
5128         err = rdev_change_bss(rdev, dev, &params);
5129         wdev_unlock(wdev);
5130
5131         return err;
5132 }
5133
5134 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5135 {
5136         char *data = NULL;
5137         bool is_indoor;
5138         enum nl80211_user_reg_hint_type user_reg_hint_type;
5139         u32 owner_nlportid;
5140
5141         /*
5142          * You should only get this when cfg80211 hasn't yet initialized
5143          * completely when built-in to the kernel right between the time
5144          * window between nl80211_init() and regulatory_init(), if that is
5145          * even possible.
5146          */
5147         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5148                 return -EINPROGRESS;
5149
5150         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5151                 user_reg_hint_type =
5152                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5153         else
5154                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5155
5156         switch (user_reg_hint_type) {
5157         case NL80211_USER_REG_HINT_USER:
5158         case NL80211_USER_REG_HINT_CELL_BASE:
5159                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5160                         return -EINVAL;
5161
5162                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5163                 return regulatory_hint_user(data, user_reg_hint_type);
5164         case NL80211_USER_REG_HINT_INDOOR:
5165                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5166                         owner_nlportid = info->snd_portid;
5167                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5168                 } else {
5169                         owner_nlportid = 0;
5170                         is_indoor = true;
5171                 }
5172
5173                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5174         default:
5175                 return -EINVAL;
5176         }
5177 }
5178
5179 static int nl80211_get_mesh_config(struct sk_buff *skb,
5180                                    struct genl_info *info)
5181 {
5182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5183         struct net_device *dev = info->user_ptr[1];
5184         struct wireless_dev *wdev = dev->ieee80211_ptr;
5185         struct mesh_config cur_params;
5186         int err = 0;
5187         void *hdr;
5188         struct nlattr *pinfoattr;
5189         struct sk_buff *msg;
5190
5191         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5192                 return -EOPNOTSUPP;
5193
5194         if (!rdev->ops->get_mesh_config)
5195                 return -EOPNOTSUPP;
5196
5197         wdev_lock(wdev);
5198         /* If not connected, get default parameters */
5199         if (!wdev->mesh_id_len)
5200                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5201         else
5202                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5203         wdev_unlock(wdev);
5204
5205         if (err)
5206                 return err;
5207
5208         /* Draw up a netlink message to send back */
5209         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5210         if (!msg)
5211                 return -ENOMEM;
5212         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5213                              NL80211_CMD_GET_MESH_CONFIG);
5214         if (!hdr)
5215                 goto out;
5216         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5217         if (!pinfoattr)
5218                 goto nla_put_failure;
5219         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5220             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5221                         cur_params.dot11MeshRetryTimeout) ||
5222             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5223                         cur_params.dot11MeshConfirmTimeout) ||
5224             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5225                         cur_params.dot11MeshHoldingTimeout) ||
5226             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5227                         cur_params.dot11MeshMaxPeerLinks) ||
5228             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5229                        cur_params.dot11MeshMaxRetries) ||
5230             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5231                        cur_params.dot11MeshTTL) ||
5232             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5233                        cur_params.element_ttl) ||
5234             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5235                        cur_params.auto_open_plinks) ||
5236             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5237                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5238             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5239                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5240             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5241                         cur_params.path_refresh_time) ||
5242             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5243                         cur_params.min_discovery_timeout) ||
5244             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5245                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5246             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5247                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5248             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5249                         cur_params.dot11MeshHWMPperrMinInterval) ||
5250             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5251                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5252             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5253                        cur_params.dot11MeshHWMPRootMode) ||
5254             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5255                         cur_params.dot11MeshHWMPRannInterval) ||
5256             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5257                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5258             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5259                        cur_params.dot11MeshForwarding) ||
5260             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5261                         cur_params.rssi_threshold) ||
5262             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5263                         cur_params.ht_opmode) ||
5264             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5265                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5266             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5267                         cur_params.dot11MeshHWMProotInterval) ||
5268             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5269                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5270             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5271                         cur_params.power_mode) ||
5272             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5273                         cur_params.dot11MeshAwakeWindowDuration) ||
5274             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5275                         cur_params.plink_timeout))
5276                 goto nla_put_failure;
5277         nla_nest_end(msg, pinfoattr);
5278         genlmsg_end(msg, hdr);
5279         return genlmsg_reply(msg, info);
5280
5281  nla_put_failure:
5282         genlmsg_cancel(msg, hdr);
5283  out:
5284         nlmsg_free(msg);
5285         return -ENOBUFS;
5286 }
5287
5288 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5289         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5290         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5291         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5292         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5293         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5294         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5295         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5296         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5297         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5298         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5299         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5300         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5301         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5302         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5303         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5304         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5305         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5306         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5307         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5308         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5309         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5310         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5311         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5312         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5313         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5314         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5315         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5316         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5317 };
5318
5319 static const struct nla_policy
5320         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5321         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5322         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5323         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5324         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5325         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5326         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5327         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5328                                     .len = IEEE80211_MAX_DATA_LEN },
5329         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5330 };
5331
5332 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5333 {
5334         u8 val = nla_get_u8(nla);
5335         if (val < min || val > max)
5336                 return -EINVAL;
5337         *out = val;
5338         return 0;
5339 }
5340
5341 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5342 {
5343         u8 val = nla_get_u8(nla);
5344         if (val < min || val > max)
5345                 return -EINVAL;
5346         *out = val;
5347         return 0;
5348 }
5349
5350 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5351 {
5352         u16 val = nla_get_u16(nla);
5353         if (val < min || val > max)
5354                 return -EINVAL;
5355         *out = val;
5356         return 0;
5357 }
5358
5359 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5360 {
5361         u32 val = nla_get_u32(nla);
5362         if (val < min || val > max)
5363                 return -EINVAL;
5364         *out = val;
5365         return 0;
5366 }
5367
5368 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5369 {
5370         s32 val = nla_get_s32(nla);
5371         if (val < min || val > max)
5372                 return -EINVAL;
5373         *out = val;
5374         return 0;
5375 }
5376
5377 static int nl80211_parse_mesh_config(struct genl_info *info,
5378                                      struct mesh_config *cfg,
5379                                      u32 *mask_out)
5380 {
5381         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5382         u32 mask = 0;
5383         u16 ht_opmode;
5384
5385 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5386 do {                                                                        \
5387         if (tb[attr]) {                                                     \
5388                 if (fn(tb[attr], min, max, &cfg->param))                    \
5389                         return -EINVAL;                                     \
5390                 mask |= (1 << (attr - 1));                                  \
5391         }                                                                   \
5392 } while (0)
5393
5394         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5395                 return -EINVAL;
5396         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5397                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5398                              nl80211_meshconf_params_policy))
5399                 return -EINVAL;
5400
5401         /* This makes sure that there aren't more than 32 mesh config
5402          * parameters (otherwise our bitfield scheme would not work.) */
5403         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5404
5405         /* Fill in the params struct */
5406         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5407                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5408                                   nl80211_check_u16);
5409         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5410                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5411                                   nl80211_check_u16);
5412         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5413                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5414                                   nl80211_check_u16);
5415         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5416                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5417                                   nl80211_check_u16);
5418         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5419                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5420                                   nl80211_check_u8);
5421         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5422                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5423         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5424                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5425                                   nl80211_check_u8);
5426         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5427                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5428                                   nl80211_check_bool);
5429         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5430                                   1, 255, mask,
5431                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5432                                   nl80211_check_u32);
5433         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5434                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5435                                   nl80211_check_u8);
5436         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5437                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5438                                   nl80211_check_u32);
5439         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5440                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5441                                   nl80211_check_u16);
5442         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5443                                   1, 65535, mask,
5444                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5445                                   nl80211_check_u32);
5446         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5447                                   1, 65535, mask,
5448                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5449                                   nl80211_check_u16);
5450         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5451                                   1, 65535, mask,
5452                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5453                                   nl80211_check_u16);
5454         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5455                                   dot11MeshHWMPnetDiameterTraversalTime,
5456                                   1, 65535, mask,
5457                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5458                                   nl80211_check_u16);
5459         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5460                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5461                                   nl80211_check_u8);
5462         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5463                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5464                                   nl80211_check_u16);
5465         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5466                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5467                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5468                                   nl80211_check_bool);
5469         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5470                                   mask, NL80211_MESHCONF_FORWARDING,
5471                                   nl80211_check_bool);
5472         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5473                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5474                                   nl80211_check_s32);
5475         /*
5476          * Check HT operation mode based on
5477          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5478          */
5479         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5480                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5481
5482                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5483                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5484                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5485                         return -EINVAL;
5486
5487                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5488                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5489                         return -EINVAL;
5490
5491                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5492                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5493                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5494                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5495                                 return -EINVAL;
5496                         break;
5497                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5498                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5499                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5500                                 return -EINVAL;
5501                         break;
5502                 }
5503                 cfg->ht_opmode = ht_opmode;
5504         }
5505         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5506                                   1, 65535, mask,
5507                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5508                                   nl80211_check_u32);
5509         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5510                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5511                                   nl80211_check_u16);
5512         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5513                                   dot11MeshHWMPconfirmationInterval,
5514                                   1, 65535, mask,
5515                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5516                                   nl80211_check_u16);
5517         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5518                                   NL80211_MESH_POWER_ACTIVE,
5519                                   NL80211_MESH_POWER_MAX,
5520                                   mask, NL80211_MESHCONF_POWER_MODE,
5521                                   nl80211_check_u32);
5522         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5523                                   0, 65535, mask,
5524                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5525         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5526                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5527                                   nl80211_check_u32);
5528         if (mask_out)
5529                 *mask_out = mask;
5530
5531         return 0;
5532
5533 #undef FILL_IN_MESH_PARAM_IF_SET
5534 }
5535
5536 static int nl80211_parse_mesh_setup(struct genl_info *info,
5537                                      struct mesh_setup *setup)
5538 {
5539         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5540         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5541
5542         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5543                 return -EINVAL;
5544         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5545                              info->attrs[NL80211_ATTR_MESH_SETUP],
5546                              nl80211_mesh_setup_params_policy))
5547                 return -EINVAL;
5548
5549         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5550                 setup->sync_method =
5551                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5552                  IEEE80211_SYNC_METHOD_VENDOR :
5553                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5554
5555         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5556                 setup->path_sel_proto =
5557                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5558                  IEEE80211_PATH_PROTOCOL_VENDOR :
5559                  IEEE80211_PATH_PROTOCOL_HWMP;
5560
5561         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5562                 setup->path_metric =
5563                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5564                  IEEE80211_PATH_METRIC_VENDOR :
5565                  IEEE80211_PATH_METRIC_AIRTIME;
5566
5567         if (tb[NL80211_MESH_SETUP_IE]) {
5568                 struct nlattr *ieattr =
5569                         tb[NL80211_MESH_SETUP_IE];
5570                 if (!is_valid_ie_attr(ieattr))
5571                         return -EINVAL;
5572                 setup->ie = nla_data(ieattr);
5573                 setup->ie_len = nla_len(ieattr);
5574         }
5575         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5576             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5577                 return -EINVAL;
5578         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5579         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5580         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5581         if (setup->is_secure)
5582                 setup->user_mpm = true;
5583
5584         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5585                 if (!setup->user_mpm)
5586                         return -EINVAL;
5587                 setup->auth_id =
5588                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5589         }
5590
5591         return 0;
5592 }
5593
5594 static int nl80211_update_mesh_config(struct sk_buff *skb,
5595                                       struct genl_info *info)
5596 {
5597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5598         struct net_device *dev = info->user_ptr[1];
5599         struct wireless_dev *wdev = dev->ieee80211_ptr;
5600         struct mesh_config cfg;
5601         u32 mask;
5602         int err;
5603
5604         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5605                 return -EOPNOTSUPP;
5606
5607         if (!rdev->ops->update_mesh_config)
5608                 return -EOPNOTSUPP;
5609
5610         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5611         if (err)
5612                 return err;
5613
5614         wdev_lock(wdev);
5615         if (!wdev->mesh_id_len)
5616                 err = -ENOLINK;
5617
5618         if (!err)
5619                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5620
5621         wdev_unlock(wdev);
5622
5623         return err;
5624 }
5625
5626 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5627                               struct sk_buff *msg)
5628 {
5629         struct nlattr *nl_reg_rules;
5630         unsigned int i;
5631
5632         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5633             (regdom->dfs_region &&
5634              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5635                 goto nla_put_failure;
5636
5637         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5638         if (!nl_reg_rules)
5639                 goto nla_put_failure;
5640
5641         for (i = 0; i < regdom->n_reg_rules; i++) {
5642                 struct nlattr *nl_reg_rule;
5643                 const struct ieee80211_reg_rule *reg_rule;
5644                 const struct ieee80211_freq_range *freq_range;
5645                 const struct ieee80211_power_rule *power_rule;
5646                 unsigned int max_bandwidth_khz;
5647
5648                 reg_rule = &regdom->reg_rules[i];
5649                 freq_range = &reg_rule->freq_range;
5650                 power_rule = &reg_rule->power_rule;
5651
5652                 nl_reg_rule = nla_nest_start(msg, i);
5653                 if (!nl_reg_rule)
5654                         goto nla_put_failure;
5655
5656                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5657                 if (!max_bandwidth_khz)
5658                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5659                                                                   reg_rule);
5660
5661                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5662                                 reg_rule->flags) ||
5663                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5664                                 freq_range->start_freq_khz) ||
5665                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5666                                 freq_range->end_freq_khz) ||
5667                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5668                                 max_bandwidth_khz) ||
5669                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5670                                 power_rule->max_antenna_gain) ||
5671                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5672                                 power_rule->max_eirp) ||
5673                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5674                                 reg_rule->dfs_cac_ms))
5675                         goto nla_put_failure;
5676
5677                 nla_nest_end(msg, nl_reg_rule);
5678         }
5679
5680         nla_nest_end(msg, nl_reg_rules);
5681         return 0;
5682
5683 nla_put_failure:
5684         return -EMSGSIZE;
5685 }
5686
5687 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5688 {
5689         const struct ieee80211_regdomain *regdom = NULL;
5690         struct cfg80211_registered_device *rdev;
5691         struct wiphy *wiphy = NULL;
5692         struct sk_buff *msg;
5693         void *hdr;
5694
5695         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5696         if (!msg)
5697                 return -ENOBUFS;
5698
5699         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5700                              NL80211_CMD_GET_REG);
5701         if (!hdr)
5702                 goto put_failure;
5703
5704         if (info->attrs[NL80211_ATTR_WIPHY]) {
5705                 bool self_managed;
5706
5707                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5708                 if (IS_ERR(rdev)) {
5709                         nlmsg_free(msg);
5710                         return PTR_ERR(rdev);
5711                 }
5712
5713                 wiphy = &rdev->wiphy;
5714                 self_managed = wiphy->regulatory_flags &
5715                                REGULATORY_WIPHY_SELF_MANAGED;
5716                 regdom = get_wiphy_regdom(wiphy);
5717
5718                 /* a self-managed-reg device must have a private regdom */
5719                 if (WARN_ON(!regdom && self_managed)) {
5720                         nlmsg_free(msg);
5721                         return -EINVAL;
5722                 }
5723
5724                 if (regdom &&
5725                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5726                         goto nla_put_failure;
5727         }
5728
5729         if (!wiphy && reg_last_request_cell_base() &&
5730             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5731                         NL80211_USER_REG_HINT_CELL_BASE))
5732                 goto nla_put_failure;
5733
5734         rcu_read_lock();
5735
5736         if (!regdom)
5737                 regdom = rcu_dereference(cfg80211_regdomain);
5738
5739         if (nl80211_put_regdom(regdom, msg))
5740                 goto nla_put_failure_rcu;
5741
5742         rcu_read_unlock();
5743
5744         genlmsg_end(msg, hdr);
5745         return genlmsg_reply(msg, info);
5746
5747 nla_put_failure_rcu:
5748         rcu_read_unlock();
5749 nla_put_failure:
5750         genlmsg_cancel(msg, hdr);
5751 put_failure:
5752         nlmsg_free(msg);
5753         return -EMSGSIZE;
5754 }
5755
5756 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5757                                u32 seq, int flags, struct wiphy *wiphy,
5758                                const struct ieee80211_regdomain *regdom)
5759 {
5760         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5761                                    NL80211_CMD_GET_REG);
5762
5763         if (!hdr)
5764                 return -1;
5765
5766         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5767
5768         if (nl80211_put_regdom(regdom, msg))
5769                 goto nla_put_failure;
5770
5771         if (!wiphy && reg_last_request_cell_base() &&
5772             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5773                         NL80211_USER_REG_HINT_CELL_BASE))
5774                 goto nla_put_failure;
5775
5776         if (wiphy &&
5777             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5778                 goto nla_put_failure;
5779
5780         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5781             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5782                 goto nla_put_failure;
5783
5784         genlmsg_end(msg, hdr);
5785         return 0;
5786
5787 nla_put_failure:
5788         genlmsg_cancel(msg, hdr);
5789         return -EMSGSIZE;
5790 }
5791
5792 static int nl80211_get_reg_dump(struct sk_buff *skb,
5793                                 struct netlink_callback *cb)
5794 {
5795         const struct ieee80211_regdomain *regdom = NULL;
5796         struct cfg80211_registered_device *rdev;
5797         int err, reg_idx, start = cb->args[2];
5798
5799         rtnl_lock();
5800
5801         if (cfg80211_regdomain && start == 0) {
5802                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5803                                           NLM_F_MULTI, NULL,
5804                                           rtnl_dereference(cfg80211_regdomain));
5805                 if (err < 0)
5806                         goto out_err;
5807         }
5808
5809         /* the global regdom is idx 0 */
5810         reg_idx = 1;
5811         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5812                 regdom = get_wiphy_regdom(&rdev->wiphy);
5813                 if (!regdom)
5814                         continue;
5815
5816                 if (++reg_idx <= start)
5817                         continue;
5818
5819                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5820                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5821                 if (err < 0) {
5822                         reg_idx--;
5823                         break;
5824                 }
5825         }
5826
5827         cb->args[2] = reg_idx;
5828         err = skb->len;
5829 out_err:
5830         rtnl_unlock();
5831         return err;
5832 }
5833
5834 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5835 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5836         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5837         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5838         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5839         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5840         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5841         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5842         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5843 };
5844
5845 static int parse_reg_rule(struct nlattr *tb[],
5846         struct ieee80211_reg_rule *reg_rule)
5847 {
5848         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5849         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5850
5851         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5852                 return -EINVAL;
5853         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5854                 return -EINVAL;
5855         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5856                 return -EINVAL;
5857         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5858                 return -EINVAL;
5859         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5860                 return -EINVAL;
5861
5862         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5863
5864         freq_range->start_freq_khz =
5865                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5866         freq_range->end_freq_khz =
5867                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5868         freq_range->max_bandwidth_khz =
5869                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5870
5871         power_rule->max_eirp =
5872                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5873
5874         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5875                 power_rule->max_antenna_gain =
5876                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5877
5878         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5879                 reg_rule->dfs_cac_ms =
5880                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5881
5882         return 0;
5883 }
5884
5885 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5886 {
5887         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5888         struct nlattr *nl_reg_rule;
5889         char *alpha2;
5890         int rem_reg_rules, r;
5891         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5892         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5893         struct ieee80211_regdomain *rd;
5894
5895         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5896                 return -EINVAL;
5897
5898         if (!info->attrs[NL80211_ATTR_REG_RULES])
5899                 return -EINVAL;
5900
5901         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5902
5903         if (info->attrs[NL80211_ATTR_DFS_REGION])
5904                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5905
5906         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5907                             rem_reg_rules) {
5908                 num_rules++;
5909                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5910                         return -EINVAL;
5911         }
5912
5913         if (!reg_is_valid_request(alpha2))
5914                 return -EINVAL;
5915
5916         size_of_regd = sizeof(struct ieee80211_regdomain) +
5917                        num_rules * sizeof(struct ieee80211_reg_rule);
5918
5919         rd = kzalloc(size_of_regd, GFP_KERNEL);
5920         if (!rd)
5921                 return -ENOMEM;
5922
5923         rd->n_reg_rules = num_rules;
5924         rd->alpha2[0] = alpha2[0];
5925         rd->alpha2[1] = alpha2[1];
5926
5927         /*
5928          * Disable DFS master mode if the DFS region was
5929          * not supported or known on this kernel.
5930          */
5931         if (reg_supported_dfs_region(dfs_region))
5932                 rd->dfs_region = dfs_region;
5933
5934         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5935                             rem_reg_rules) {
5936                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5937                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5938                               reg_rule_policy);
5939                 if (r)
5940                         goto bad_reg;
5941                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5942                 if (r)
5943                         goto bad_reg;
5944
5945                 rule_idx++;
5946
5947                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5948                         r = -EINVAL;
5949                         goto bad_reg;
5950                 }
5951         }
5952
5953         /* set_regdom takes ownership of rd */
5954         return set_regdom(rd, REGD_SOURCE_CRDA);
5955  bad_reg:
5956         kfree(rd);
5957         return r;
5958 }
5959 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5960
5961 static int validate_scan_freqs(struct nlattr *freqs)
5962 {
5963         struct nlattr *attr1, *attr2;
5964         int n_channels = 0, tmp1, tmp2;
5965
5966         nla_for_each_nested(attr1, freqs, tmp1) {
5967                 n_channels++;
5968                 /*
5969                  * Some hardware has a limited channel list for
5970                  * scanning, and it is pretty much nonsensical
5971                  * to scan for a channel twice, so disallow that
5972                  * and don't require drivers to check that the
5973                  * channel list they get isn't longer than what
5974                  * they can scan, as long as they can scan all
5975                  * the channels they registered at once.
5976                  */
5977                 nla_for_each_nested(attr2, freqs, tmp2)
5978                         if (attr1 != attr2 &&
5979                             nla_get_u32(attr1) == nla_get_u32(attr2))
5980                                 return 0;
5981         }
5982
5983         return n_channels;
5984 }
5985
5986 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5987 {
5988         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5989 }
5990
5991 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5992                             struct cfg80211_bss_selection *bss_select)
5993 {
5994         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5995         struct nlattr *nest;
5996         int err;
5997         bool found = false;
5998         int i;
5999
6000         /* only process one nested attribute */
6001         nest = nla_data(nla);
6002         if (!nla_ok(nest, nla_len(nest)))
6003                 return -EINVAL;
6004
6005         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
6006                         nla_len(nest), nl80211_bss_select_policy);
6007         if (err)
6008                 return err;
6009
6010         /* only one attribute may be given */
6011         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6012                 if (attr[i]) {
6013                         if (found)
6014                                 return -EINVAL;
6015                         found = true;
6016                 }
6017         }
6018
6019         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6020
6021         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6022                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6023
6024         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6025                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6026                 bss_select->param.band_pref =
6027                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6028                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6029                         return -EINVAL;
6030         }
6031
6032         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6033                 struct nl80211_bss_select_rssi_adjust *adj_param;
6034
6035                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6036                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6037                 bss_select->param.adjust.band = adj_param->band;
6038                 bss_select->param.adjust.delta = adj_param->delta;
6039                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6040                         return -EINVAL;
6041         }
6042
6043         /* user-space did not provide behaviour attribute */
6044         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6045                 return -EINVAL;
6046
6047         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6048                 return -EINVAL;
6049
6050         return 0;
6051 }
6052
6053 static int nl80211_parse_random_mac(struct nlattr **attrs,
6054                                     u8 *mac_addr, u8 *mac_addr_mask)
6055 {
6056         int i;
6057
6058         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6059                 eth_zero_addr(mac_addr);
6060                 eth_zero_addr(mac_addr_mask);
6061                 mac_addr[0] = 0x2;
6062                 mac_addr_mask[0] = 0x3;
6063
6064                 return 0;
6065         }
6066
6067         /* need both or none */
6068         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6069                 return -EINVAL;
6070
6071         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6072         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6073
6074         /* don't allow or configure an mcast address */
6075         if (!is_multicast_ether_addr(mac_addr_mask) ||
6076             is_multicast_ether_addr(mac_addr))
6077                 return -EINVAL;
6078
6079         /*
6080          * allow users to pass a MAC address that has bits set outside
6081          * of the mask, but don't bother drivers with having to deal
6082          * with such bits
6083          */
6084         for (i = 0; i < ETH_ALEN; i++)
6085                 mac_addr[i] &= mac_addr_mask[i];
6086
6087         return 0;
6088 }
6089
6090 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6091 {
6092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6093         struct wireless_dev *wdev = info->user_ptr[1];
6094         struct cfg80211_scan_request *request;
6095         struct nlattr *attr;
6096         struct wiphy *wiphy;
6097         int err, tmp, n_ssids = 0, n_channels, i;
6098         size_t ie_len;
6099
6100         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6101                 return -EINVAL;
6102
6103         wiphy = &rdev->wiphy;
6104
6105         if (!rdev->ops->scan)
6106                 return -EOPNOTSUPP;
6107
6108         if (rdev->scan_req || rdev->scan_msg) {
6109                 err = -EBUSY;
6110                 goto unlock;
6111         }
6112
6113         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6114                 n_channels = validate_scan_freqs(
6115                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6116                 if (!n_channels) {
6117                         err = -EINVAL;
6118                         goto unlock;
6119                 }
6120         } else {
6121                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6122         }
6123
6124         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6125                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6126                         n_ssids++;
6127
6128         if (n_ssids > wiphy->max_scan_ssids) {
6129                 err = -EINVAL;
6130                 goto unlock;
6131         }
6132
6133         if (info->attrs[NL80211_ATTR_IE])
6134                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6135         else
6136                 ie_len = 0;
6137
6138         if (ie_len > wiphy->max_scan_ie_len) {
6139                 err = -EINVAL;
6140                 goto unlock;
6141         }
6142
6143         request = kzalloc(sizeof(*request)
6144                         + sizeof(*request->ssids) * n_ssids
6145                         + sizeof(*request->channels) * n_channels
6146                         + ie_len, GFP_KERNEL);
6147         if (!request) {
6148                 err = -ENOMEM;
6149                 goto unlock;
6150         }
6151
6152         if (n_ssids)
6153                 request->ssids = (void *)&request->channels[n_channels];
6154         request->n_ssids = n_ssids;
6155         if (ie_len) {
6156                 if (n_ssids)
6157                         request->ie = (void *)(request->ssids + n_ssids);
6158                 else
6159                         request->ie = (void *)(request->channels + n_channels);
6160         }
6161
6162         i = 0;
6163         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6164                 /* user specified, bail out if channel not found */
6165                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6166                         struct ieee80211_channel *chan;
6167
6168                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6169
6170                         if (!chan) {
6171                                 err = -EINVAL;
6172                                 goto out_free;
6173                         }
6174
6175                         /* ignore disabled channels */
6176                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6177                                 continue;
6178
6179                         request->channels[i] = chan;
6180                         i++;
6181                 }
6182         } else {
6183                 enum nl80211_band band;
6184
6185                 /* all channels */
6186                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6187                         int j;
6188
6189                         if (!wiphy->bands[band])
6190                                 continue;
6191                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6192                                 struct ieee80211_channel *chan;
6193
6194                                 chan = &wiphy->bands[band]->channels[j];
6195
6196                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6197                                         continue;
6198
6199                                 request->channels[i] = chan;
6200                                 i++;
6201                         }
6202                 }
6203         }
6204
6205         if (!i) {
6206                 err = -EINVAL;
6207                 goto out_free;
6208         }
6209
6210         request->n_channels = i;
6211
6212         i = 0;
6213         if (n_ssids) {
6214                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6215                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6216                                 err = -EINVAL;
6217                                 goto out_free;
6218                         }
6219                         request->ssids[i].ssid_len = nla_len(attr);
6220                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6221                         i++;
6222                 }
6223         }
6224
6225         if (info->attrs[NL80211_ATTR_IE]) {
6226                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6227                 memcpy((void *)request->ie,
6228                        nla_data(info->attrs[NL80211_ATTR_IE]),
6229                        request->ie_len);
6230         }
6231
6232         for (i = 0; i < NUM_NL80211_BANDS; i++)
6233                 if (wiphy->bands[i])
6234                         request->rates[i] =
6235                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6236
6237         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6238                 nla_for_each_nested(attr,
6239                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6240                                     tmp) {
6241                         enum nl80211_band band = nla_type(attr);
6242
6243                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6244                                 err = -EINVAL;
6245                                 goto out_free;
6246                         }
6247
6248                         if (!wiphy->bands[band])
6249                                 continue;
6250
6251                         err = ieee80211_get_ratemask(wiphy->bands[band],
6252                                                      nla_data(attr),
6253                                                      nla_len(attr),
6254                                                      &request->rates[band]);
6255                         if (err)
6256                                 goto out_free;
6257                 }
6258         }
6259
6260         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6261                 if (!wiphy_ext_feature_isset(wiphy,
6262                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6263                         err = -EOPNOTSUPP;
6264                         goto out_free;
6265                 }
6266
6267                 request->duration =
6268                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6269                 request->duration_mandatory =
6270                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6271         }
6272
6273         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6274                 request->flags = nla_get_u32(
6275                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6276                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6277                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6278                         err = -EOPNOTSUPP;
6279                         goto out_free;
6280                 }
6281
6282                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6283                         if (!(wiphy->features &
6284                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6285                                 err = -EOPNOTSUPP;
6286                                 goto out_free;
6287                         }
6288
6289                         if (wdev->current_bss) {
6290                                 err = -EOPNOTSUPP;
6291                                 goto out_free;
6292                         }
6293
6294                         err = nl80211_parse_random_mac(info->attrs,
6295                                                        request->mac_addr,
6296                                                        request->mac_addr_mask);
6297                         if (err)
6298                                 goto out_free;
6299                 }
6300         }
6301
6302         request->no_cck =
6303                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6304
6305         if (info->attrs[NL80211_ATTR_MAC])
6306                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6307                        ETH_ALEN);
6308         else
6309                 eth_broadcast_addr(request->bssid);
6310
6311         request->wdev = wdev;
6312         request->wiphy = &rdev->wiphy;
6313         request->scan_start = jiffies;
6314
6315         rdev->scan_req = request;
6316         err = rdev_scan(rdev, request);
6317
6318         if (!err) {
6319                 nl80211_send_scan_start(rdev, wdev);
6320                 if (wdev->netdev)
6321                         dev_hold(wdev->netdev);
6322         } else {
6323  out_free:
6324                 rdev->scan_req = NULL;
6325                 kfree(request);
6326         }
6327
6328  unlock:
6329         return err;
6330 }
6331
6332 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6333 {
6334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6335         struct wireless_dev *wdev = info->user_ptr[1];
6336
6337         if (!rdev->ops->abort_scan)
6338                 return -EOPNOTSUPP;
6339
6340         if (rdev->scan_msg)
6341                 return 0;
6342
6343         if (!rdev->scan_req)
6344                 return -ENOENT;
6345
6346         rdev_abort_scan(rdev, wdev);
6347         return 0;
6348 }
6349
6350 static int
6351 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6352                                struct cfg80211_sched_scan_request *request,
6353                                struct nlattr **attrs)
6354 {
6355         int tmp, err, i = 0;
6356         struct nlattr *attr;
6357
6358         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6359                 u32 interval;
6360
6361                 /*
6362                  * If scan plans are not specified,
6363                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6364                  * case one scan plan will be set with the specified scan
6365                  * interval and infinite number of iterations.
6366                  */
6367                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6368                         return -EINVAL;
6369
6370                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6371                 if (!interval)
6372                         return -EINVAL;
6373
6374                 request->scan_plans[0].interval =
6375                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6376                 if (!request->scan_plans[0].interval)
6377                         return -EINVAL;
6378
6379                 if (request->scan_plans[0].interval >
6380                     wiphy->max_sched_scan_plan_interval)
6381                         request->scan_plans[0].interval =
6382                                 wiphy->max_sched_scan_plan_interval;
6383
6384                 return 0;
6385         }
6386
6387         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6388                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6389
6390                 if (WARN_ON(i >= n_plans))
6391                         return -EINVAL;
6392
6393                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6394                                 nla_data(attr), nla_len(attr),
6395                                 nl80211_plan_policy);
6396                 if (err)
6397                         return err;
6398
6399                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6400                         return -EINVAL;
6401
6402                 request->scan_plans[i].interval =
6403                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6404                 if (!request->scan_plans[i].interval ||
6405                     request->scan_plans[i].interval >
6406                     wiphy->max_sched_scan_plan_interval)
6407                         return -EINVAL;
6408
6409                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6410                         request->scan_plans[i].iterations =
6411                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6412                         if (!request->scan_plans[i].iterations ||
6413                             (request->scan_plans[i].iterations >
6414                              wiphy->max_sched_scan_plan_iterations))
6415                                 return -EINVAL;
6416                 } else if (i < n_plans - 1) {
6417                         /*
6418                          * All scan plans but the last one must specify
6419                          * a finite number of iterations
6420                          */
6421                         return -EINVAL;
6422                 }
6423
6424                 i++;
6425         }
6426
6427         /*
6428          * The last scan plan must not specify the number of
6429          * iterations, it is supposed to run infinitely
6430          */
6431         if (request->scan_plans[n_plans - 1].iterations)
6432                 return  -EINVAL;
6433
6434         return 0;
6435 }
6436
6437 static struct cfg80211_sched_scan_request *
6438 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6439                          struct nlattr **attrs)
6440 {
6441         struct cfg80211_sched_scan_request *request;
6442         struct nlattr *attr;
6443         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6444         enum nl80211_band band;
6445         size_t ie_len;
6446         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6447         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6448
6449         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6450                 return ERR_PTR(-EINVAL);
6451
6452         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6453                 n_channels = validate_scan_freqs(
6454                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6455                 if (!n_channels)
6456                         return ERR_PTR(-EINVAL);
6457         } else {
6458                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6459         }
6460
6461         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6462                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6463                                     tmp)
6464                         n_ssids++;
6465
6466         if (n_ssids > wiphy->max_sched_scan_ssids)
6467                 return ERR_PTR(-EINVAL);
6468
6469         /*
6470          * First, count the number of 'real' matchsets. Due to an issue with
6471          * the old implementation, matchsets containing only the RSSI attribute
6472          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6473          * RSSI for all matchsets, rather than their own matchset for reporting
6474          * all APs with a strong RSSI. This is needed to be compatible with
6475          * older userspace that treated a matchset with only the RSSI as the
6476          * global RSSI for all other matchsets - if there are other matchsets.
6477          */
6478         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6479                 nla_for_each_nested(attr,
6480                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6481                                     tmp) {
6482                         struct nlattr *rssi;
6483
6484                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6485                                         nla_data(attr), nla_len(attr),
6486                                         nl80211_match_policy);
6487                         if (err)
6488                                 return ERR_PTR(err);
6489                         /* add other standalone attributes here */
6490                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6491                                 n_match_sets++;
6492                                 continue;
6493                         }
6494                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6495                         if (rssi)
6496                                 default_match_rssi = nla_get_s32(rssi);
6497                 }
6498         }
6499
6500         /* However, if there's no other matchset, add the RSSI one */
6501         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6502                 n_match_sets = 1;
6503
6504         if (n_match_sets > wiphy->max_match_sets)
6505                 return ERR_PTR(-EINVAL);
6506
6507         if (attrs[NL80211_ATTR_IE])
6508                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6509         else
6510                 ie_len = 0;
6511
6512         if (ie_len > wiphy->max_sched_scan_ie_len)
6513                 return ERR_PTR(-EINVAL);
6514
6515         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6516                 /*
6517                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6518                  * each scan plan already specifies its own interval
6519                  */
6520                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6521                         return ERR_PTR(-EINVAL);
6522
6523                 nla_for_each_nested(attr,
6524                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6525                         n_plans++;
6526         } else {
6527                 /*
6528                  * The scan interval attribute is kept for backward
6529                  * compatibility. If no scan plans are specified and sched scan
6530                  * interval is specified, one scan plan will be set with this
6531                  * scan interval and infinite number of iterations.
6532                  */
6533                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6534                         return ERR_PTR(-EINVAL);
6535
6536                 n_plans = 1;
6537         }
6538
6539         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6540                 return ERR_PTR(-EINVAL);
6541
6542         request = kzalloc(sizeof(*request)
6543                         + sizeof(*request->ssids) * n_ssids
6544                         + sizeof(*request->match_sets) * n_match_sets
6545                         + sizeof(*request->scan_plans) * n_plans
6546                         + sizeof(*request->channels) * n_channels
6547                         + ie_len, GFP_KERNEL);
6548         if (!request)
6549                 return ERR_PTR(-ENOMEM);
6550
6551         if (n_ssids)
6552                 request->ssids = (void *)&request->channels[n_channels];
6553         request->n_ssids = n_ssids;
6554         if (ie_len) {
6555                 if (n_ssids)
6556                         request->ie = (void *)(request->ssids + n_ssids);
6557                 else
6558                         request->ie = (void *)(request->channels + n_channels);
6559         }
6560
6561         if (n_match_sets) {
6562                 if (request->ie)
6563                         request->match_sets = (void *)(request->ie + ie_len);
6564                 else if (n_ssids)
6565                         request->match_sets =
6566                                 (void *)(request->ssids + n_ssids);
6567                 else
6568                         request->match_sets =
6569                                 (void *)(request->channels + n_channels);
6570         }
6571         request->n_match_sets = n_match_sets;
6572
6573         if (n_match_sets)
6574                 request->scan_plans = (void *)(request->match_sets +
6575                                                n_match_sets);
6576         else if (request->ie)
6577                 request->scan_plans = (void *)(request->ie + ie_len);
6578         else if (n_ssids)
6579                 request->scan_plans = (void *)(request->ssids + n_ssids);
6580         else
6581                 request->scan_plans = (void *)(request->channels + n_channels);
6582
6583         request->n_scan_plans = n_plans;
6584
6585         i = 0;
6586         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6587                 /* user specified, bail out if channel not found */
6588                 nla_for_each_nested(attr,
6589                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6590                                     tmp) {
6591                         struct ieee80211_channel *chan;
6592
6593                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6594
6595                         if (!chan) {
6596                                 err = -EINVAL;
6597                                 goto out_free;
6598                         }
6599
6600                         /* ignore disabled channels */
6601                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6602                                 continue;
6603
6604                         request->channels[i] = chan;
6605                         i++;
6606                 }
6607         } else {
6608                 /* all channels */
6609                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6610                         int j;
6611
6612                         if (!wiphy->bands[band])
6613                                 continue;
6614                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6615                                 struct ieee80211_channel *chan;
6616
6617                                 chan = &wiphy->bands[band]->channels[j];
6618
6619                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6620                                         continue;
6621
6622                                 request->channels[i] = chan;
6623                                 i++;
6624                         }
6625                 }
6626         }
6627
6628         if (!i) {
6629                 err = -EINVAL;
6630                 goto out_free;
6631         }
6632
6633         request->n_channels = i;
6634
6635         i = 0;
6636         if (n_ssids) {
6637                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6638                                     tmp) {
6639                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6640                                 err = -EINVAL;
6641                                 goto out_free;
6642                         }
6643                         request->ssids[i].ssid_len = nla_len(attr);
6644                         memcpy(request->ssids[i].ssid, nla_data(attr),
6645                                nla_len(attr));
6646                         i++;
6647                 }
6648         }
6649
6650         i = 0;
6651         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6652                 nla_for_each_nested(attr,
6653                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6654                                     tmp) {
6655                         struct nlattr *ssid, *rssi;
6656
6657                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6658                                         nla_data(attr), nla_len(attr),
6659                                         nl80211_match_policy);
6660                         if (err)
6661                                 goto out_free;
6662                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6663                         if (ssid) {
6664                                 if (WARN_ON(i >= n_match_sets)) {
6665                                         /* this indicates a programming error,
6666                                          * the loop above should have verified
6667                                          * things properly
6668                                          */
6669                                         err = -EINVAL;
6670                                         goto out_free;
6671                                 }
6672
6673                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6674                                         err = -EINVAL;
6675                                         goto out_free;
6676                                 }
6677                                 memcpy(request->match_sets[i].ssid.ssid,
6678                                        nla_data(ssid), nla_len(ssid));
6679                                 request->match_sets[i].ssid.ssid_len =
6680                                         nla_len(ssid);
6681                                 /* special attribute - old implementation w/a */
6682                                 request->match_sets[i].rssi_thold =
6683                                         default_match_rssi;
6684                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6685                                 if (rssi)
6686                                         request->match_sets[i].rssi_thold =
6687                                                 nla_get_s32(rssi);
6688                         }
6689                         i++;
6690                 }
6691
6692                 /* there was no other matchset, so the RSSI one is alone */
6693                 if (i == 0 && n_match_sets)
6694                         request->match_sets[0].rssi_thold = default_match_rssi;
6695
6696                 request->min_rssi_thold = INT_MAX;
6697                 for (i = 0; i < n_match_sets; i++)
6698                         request->min_rssi_thold =
6699                                 min(request->match_sets[i].rssi_thold,
6700                                     request->min_rssi_thold);
6701         } else {
6702                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6703         }
6704
6705         if (ie_len) {
6706                 request->ie_len = ie_len;
6707                 memcpy((void *)request->ie,
6708                        nla_data(attrs[NL80211_ATTR_IE]),
6709                        request->ie_len);
6710         }
6711
6712         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6713                 request->flags = nla_get_u32(
6714                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6715                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6716                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6717                         err = -EOPNOTSUPP;
6718                         goto out_free;
6719                 }
6720
6721                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6722                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6723
6724                         if (!wdev) /* must be net-detect */
6725                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6726
6727                         if (!(wiphy->features & flg)) {
6728                                 err = -EOPNOTSUPP;
6729                                 goto out_free;
6730                         }
6731
6732                         if (wdev && wdev->current_bss) {
6733                                 err = -EOPNOTSUPP;
6734                                 goto out_free;
6735                         }
6736
6737                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6738                                                        request->mac_addr_mask);
6739                         if (err)
6740                                 goto out_free;
6741                 }
6742         }
6743
6744         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6745                 request->delay =
6746                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6747
6748         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6749         if (err)
6750                 goto out_free;
6751
6752         request->scan_start = jiffies;
6753
6754         return request;
6755
6756 out_free:
6757         kfree(request);
6758         return ERR_PTR(err);
6759 }
6760
6761 static int nl80211_start_sched_scan(struct sk_buff *skb,
6762                                     struct genl_info *info)
6763 {
6764         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6765         struct net_device *dev = info->user_ptr[1];
6766         struct wireless_dev *wdev = dev->ieee80211_ptr;
6767         struct cfg80211_sched_scan_request *sched_scan_req;
6768         int err;
6769
6770         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6771             !rdev->ops->sched_scan_start)
6772                 return -EOPNOTSUPP;
6773
6774         if (rdev->sched_scan_req)
6775                 return -EINPROGRESS;
6776
6777         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6778                                                   info->attrs);
6779
6780         err = PTR_ERR_OR_ZERO(sched_scan_req);
6781         if (err)
6782                 goto out_err;
6783
6784         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6785         if (err)
6786                 goto out_free;
6787
6788         sched_scan_req->dev = dev;
6789         sched_scan_req->wiphy = &rdev->wiphy;
6790
6791         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6792                 sched_scan_req->owner_nlportid = info->snd_portid;
6793
6794         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6795
6796         nl80211_send_sched_scan(rdev, dev,
6797                                 NL80211_CMD_START_SCHED_SCAN);
6798         return 0;
6799
6800 out_free:
6801         kfree(sched_scan_req);
6802 out_err:
6803         return err;
6804 }
6805
6806 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6807                                    struct genl_info *info)
6808 {
6809         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6810
6811         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6812             !rdev->ops->sched_scan_stop)
6813                 return -EOPNOTSUPP;
6814
6815         return __cfg80211_stop_sched_scan(rdev, false);
6816 }
6817
6818 static int nl80211_start_radar_detection(struct sk_buff *skb,
6819                                          struct genl_info *info)
6820 {
6821         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6822         struct net_device *dev = info->user_ptr[1];
6823         struct wireless_dev *wdev = dev->ieee80211_ptr;
6824         struct cfg80211_chan_def chandef;
6825         enum nl80211_dfs_regions dfs_region;
6826         unsigned int cac_time_ms;
6827         int err;
6828
6829         dfs_region = reg_get_dfs_region(wdev->wiphy);
6830         if (dfs_region == NL80211_DFS_UNSET)
6831                 return -EINVAL;
6832
6833         err = nl80211_parse_chandef(rdev, info, &chandef);
6834         if (err)
6835                 return err;
6836
6837         if (netif_carrier_ok(dev))
6838                 return -EBUSY;
6839
6840         if (wdev->cac_started)
6841                 return -EBUSY;
6842
6843         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6844                                             wdev->iftype);
6845         if (err < 0)
6846                 return err;
6847
6848         if (err == 0)
6849                 return -EINVAL;
6850
6851         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6852                 return -EINVAL;
6853
6854         if (!rdev->ops->start_radar_detection)
6855                 return -EOPNOTSUPP;
6856
6857         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6858         if (WARN_ON(!cac_time_ms))
6859                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6860
6861         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6862         if (!err) {
6863                 wdev->chandef = chandef;
6864                 wdev->cac_started = true;
6865                 wdev->cac_start_time = jiffies;
6866                 wdev->cac_time_ms = cac_time_ms;
6867         }
6868         return err;
6869 }
6870
6871 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6872 {
6873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6874         struct net_device *dev = info->user_ptr[1];
6875         struct wireless_dev *wdev = dev->ieee80211_ptr;
6876         struct cfg80211_csa_settings params;
6877         /* csa_attrs is defined static to avoid waste of stack size - this
6878          * function is called under RTNL lock, so this should not be a problem.
6879          */
6880         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6881         int err;
6882         bool need_new_beacon = false;
6883         int len, i;
6884         u32 cs_count;
6885
6886         if (!rdev->ops->channel_switch ||
6887             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6888                 return -EOPNOTSUPP;
6889
6890         switch (dev->ieee80211_ptr->iftype) {
6891         case NL80211_IFTYPE_AP:
6892         case NL80211_IFTYPE_P2P_GO:
6893                 need_new_beacon = true;
6894
6895                 /* useless if AP is not running */
6896                 if (!wdev->beacon_interval)
6897                         return -ENOTCONN;
6898                 break;
6899         case NL80211_IFTYPE_ADHOC:
6900                 if (!wdev->ssid_len)
6901                         return -ENOTCONN;
6902                 break;
6903         case NL80211_IFTYPE_MESH_POINT:
6904                 if (!wdev->mesh_id_len)
6905                         return -ENOTCONN;
6906                 break;
6907         default:
6908                 return -EOPNOTSUPP;
6909         }
6910
6911         memset(&params, 0, sizeof(params));
6912
6913         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6914             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6915                 return -EINVAL;
6916
6917         /* only important for AP, IBSS and mesh create IEs internally */
6918         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6919                 return -EINVAL;
6920
6921         /* Even though the attribute is u32, the specification says
6922          * u8, so let's make sure we don't overflow.
6923          */
6924         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6925         if (cs_count > 255)
6926                 return -EINVAL;
6927
6928         params.count = cs_count;
6929
6930         if (!need_new_beacon)
6931                 goto skip_beacons;
6932
6933         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6934         if (err)
6935                 return err;
6936
6937         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6938                                info->attrs[NL80211_ATTR_CSA_IES],
6939                                nl80211_policy);
6940         if (err)
6941                 return err;
6942
6943         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6944         if (err)
6945                 return err;
6946
6947         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6948                 return -EINVAL;
6949
6950         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6951         if (!len || (len % sizeof(u16)))
6952                 return -EINVAL;
6953
6954         params.n_counter_offsets_beacon = len / sizeof(u16);
6955         if (rdev->wiphy.max_num_csa_counters &&
6956             (params.n_counter_offsets_beacon >
6957              rdev->wiphy.max_num_csa_counters))
6958                 return -EINVAL;
6959
6960         params.counter_offsets_beacon =
6961                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6962
6963         /* sanity checks - counters should fit and be the same */
6964         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6965                 u16 offset = params.counter_offsets_beacon[i];
6966
6967                 if (offset >= params.beacon_csa.tail_len)
6968                         return -EINVAL;
6969
6970                 if (params.beacon_csa.tail[offset] != params.count)
6971                         return -EINVAL;
6972         }
6973
6974         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6975                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6976                 if (!len || (len % sizeof(u16)))
6977                         return -EINVAL;
6978
6979                 params.n_counter_offsets_presp = len / sizeof(u16);
6980                 if (rdev->wiphy.max_num_csa_counters &&
6981                     (params.n_counter_offsets_beacon >
6982                      rdev->wiphy.max_num_csa_counters))
6983                         return -EINVAL;
6984
6985                 params.counter_offsets_presp =
6986                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6987
6988                 /* sanity checks - counters should fit and be the same */
6989                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6990                         u16 offset = params.counter_offsets_presp[i];
6991
6992                         if (offset >= params.beacon_csa.probe_resp_len)
6993                                 return -EINVAL;
6994
6995                         if (params.beacon_csa.probe_resp[offset] !=
6996                             params.count)
6997                                 return -EINVAL;
6998                 }
6999         }
7000
7001 skip_beacons:
7002         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7003         if (err)
7004                 return err;
7005
7006         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7007                                            wdev->iftype))
7008                 return -EINVAL;
7009
7010         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7011                                             &params.chandef,
7012                                             wdev->iftype);
7013         if (err < 0)
7014                 return err;
7015
7016         if (err > 0)
7017                 params.radar_required = true;
7018
7019         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7020                 params.block_tx = true;
7021
7022         wdev_lock(wdev);
7023         err = rdev_channel_switch(rdev, dev, &params);
7024         wdev_unlock(wdev);
7025
7026         return err;
7027 }
7028
7029 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7030                             u32 seq, int flags,
7031                             struct cfg80211_registered_device *rdev,
7032                             struct wireless_dev *wdev,
7033                             struct cfg80211_internal_bss *intbss)
7034 {
7035         struct cfg80211_bss *res = &intbss->pub;
7036         const struct cfg80211_bss_ies *ies;
7037         void *hdr;
7038         struct nlattr *bss;
7039
7040         ASSERT_WDEV_LOCK(wdev);
7041
7042         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7043                              NL80211_CMD_NEW_SCAN_RESULTS);
7044         if (!hdr)
7045                 return -1;
7046
7047         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7048
7049         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7050                 goto nla_put_failure;
7051         if (wdev->netdev &&
7052             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7053                 goto nla_put_failure;
7054         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7055                               NL80211_ATTR_PAD))
7056                 goto nla_put_failure;
7057
7058         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7059         if (!bss)
7060                 goto nla_put_failure;
7061         if ((!is_zero_ether_addr(res->bssid) &&
7062              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7063                 goto nla_put_failure;
7064
7065         rcu_read_lock();
7066         /* indicate whether we have probe response data or not */
7067         if (rcu_access_pointer(res->proberesp_ies) &&
7068             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7069                 goto fail_unlock_rcu;
7070
7071         /* this pointer prefers to be pointed to probe response data
7072          * but is always valid
7073          */
7074         ies = rcu_dereference(res->ies);
7075         if (ies) {
7076                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7077                                       NL80211_BSS_PAD))
7078                         goto fail_unlock_rcu;
7079                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7080                                         ies->len, ies->data))
7081                         goto fail_unlock_rcu;
7082         }
7083
7084         /* and this pointer is always (unless driver didn't know) beacon data */
7085         ies = rcu_dereference(res->beacon_ies);
7086         if (ies && ies->from_beacon) {
7087                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7088                                       NL80211_BSS_PAD))
7089                         goto fail_unlock_rcu;
7090                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7091                                         ies->len, ies->data))
7092                         goto fail_unlock_rcu;
7093         }
7094         rcu_read_unlock();
7095
7096         if (res->beacon_interval &&
7097             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7098                 goto nla_put_failure;
7099         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7100             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7101             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7102             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7103                         jiffies_to_msecs(jiffies - intbss->ts)))
7104                 goto nla_put_failure;
7105
7106         if (intbss->parent_tsf &&
7107             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7108                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7109              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7110                      intbss->parent_bssid)))
7111                 goto nla_put_failure;
7112
7113         if (intbss->ts_boottime &&
7114             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7115                               intbss->ts_boottime, NL80211_BSS_PAD))
7116                 goto nla_put_failure;
7117
7118         switch (rdev->wiphy.signal_type) {
7119         case CFG80211_SIGNAL_TYPE_MBM:
7120                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7121                         goto nla_put_failure;
7122                 break;
7123         case CFG80211_SIGNAL_TYPE_UNSPEC:
7124                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7125                         goto nla_put_failure;
7126                 break;
7127         default:
7128                 break;
7129         }
7130
7131         switch (wdev->iftype) {
7132         case NL80211_IFTYPE_P2P_CLIENT:
7133         case NL80211_IFTYPE_STATION:
7134                 if (intbss == wdev->current_bss &&
7135                     nla_put_u32(msg, NL80211_BSS_STATUS,
7136                                 NL80211_BSS_STATUS_ASSOCIATED))
7137                         goto nla_put_failure;
7138                 break;
7139         case NL80211_IFTYPE_ADHOC:
7140                 if (intbss == wdev->current_bss &&
7141                     nla_put_u32(msg, NL80211_BSS_STATUS,
7142                                 NL80211_BSS_STATUS_IBSS_JOINED))
7143                         goto nla_put_failure;
7144                 break;
7145         default:
7146                 break;
7147         }
7148
7149         nla_nest_end(msg, bss);
7150
7151         genlmsg_end(msg, hdr);
7152         return 0;
7153
7154  fail_unlock_rcu:
7155         rcu_read_unlock();
7156  nla_put_failure:
7157         genlmsg_cancel(msg, hdr);
7158         return -EMSGSIZE;
7159 }
7160
7161 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7162 {
7163         struct cfg80211_registered_device *rdev;
7164         struct cfg80211_internal_bss *scan;
7165         struct wireless_dev *wdev;
7166         int start = cb->args[2], idx = 0;
7167         int err;
7168
7169         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7170         if (err)
7171                 return err;
7172
7173         wdev_lock(wdev);
7174         spin_lock_bh(&rdev->bss_lock);
7175         cfg80211_bss_expire(rdev);
7176
7177         cb->seq = rdev->bss_generation;
7178
7179         list_for_each_entry(scan, &rdev->bss_list, list) {
7180                 if (++idx <= start)
7181                         continue;
7182                 if (nl80211_send_bss(skb, cb,
7183                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7184                                 rdev, wdev, scan) < 0) {
7185                         idx--;
7186                         break;
7187                 }
7188         }
7189
7190         spin_unlock_bh(&rdev->bss_lock);
7191         wdev_unlock(wdev);
7192
7193         cb->args[2] = idx;
7194         nl80211_finish_wdev_dump(rdev);
7195
7196         return skb->len;
7197 }
7198
7199 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7200                                int flags, struct net_device *dev,
7201                                bool allow_radio_stats,
7202                                struct survey_info *survey)
7203 {
7204         void *hdr;
7205         struct nlattr *infoattr;
7206
7207         /* skip radio stats if userspace didn't request them */
7208         if (!survey->channel && !allow_radio_stats)
7209                 return 0;
7210
7211         hdr = nl80211hdr_put(msg, portid, seq, flags,
7212                              NL80211_CMD_NEW_SURVEY_RESULTS);
7213         if (!hdr)
7214                 return -ENOMEM;
7215
7216         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7217                 goto nla_put_failure;
7218
7219         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7220         if (!infoattr)
7221                 goto nla_put_failure;
7222
7223         if (survey->channel &&
7224             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7225                         survey->channel->center_freq))
7226                 goto nla_put_failure;
7227
7228         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7229             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7230                 goto nla_put_failure;
7231         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7232             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7233                 goto nla_put_failure;
7234         if ((survey->filled & SURVEY_INFO_TIME) &&
7235             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7236                         survey->time, NL80211_SURVEY_INFO_PAD))
7237                 goto nla_put_failure;
7238         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7239             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7240                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7241                 goto nla_put_failure;
7242         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7243             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7244                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7245                 goto nla_put_failure;
7246         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7247             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7248                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7249                 goto nla_put_failure;
7250         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7251             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7252                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7253                 goto nla_put_failure;
7254         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7255             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7256                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7257                 goto nla_put_failure;
7258
7259         nla_nest_end(msg, infoattr);
7260
7261         genlmsg_end(msg, hdr);
7262         return 0;
7263
7264  nla_put_failure:
7265         genlmsg_cancel(msg, hdr);
7266         return -EMSGSIZE;
7267 }
7268
7269 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7270 {
7271         struct survey_info survey;
7272         struct cfg80211_registered_device *rdev;
7273         struct wireless_dev *wdev;
7274         int survey_idx = cb->args[2];
7275         int res;
7276         bool radio_stats;
7277
7278         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7279         if (res)
7280                 return res;
7281
7282         /* prepare_wdev_dump parsed the attributes */
7283         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7284
7285         if (!wdev->netdev) {
7286                 res = -EINVAL;
7287                 goto out_err;
7288         }
7289
7290         if (!rdev->ops->dump_survey) {
7291                 res = -EOPNOTSUPP;
7292                 goto out_err;
7293         }
7294
7295         while (1) {
7296                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7297                 if (res == -ENOENT)
7298                         break;
7299                 if (res)
7300                         goto out_err;
7301
7302                 /* don't send disabled channels, but do send non-channel data */
7303                 if (survey.channel &&
7304                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7305                         survey_idx++;
7306                         continue;
7307                 }
7308
7309                 if (nl80211_send_survey(skb,
7310                                 NETLINK_CB(cb->skb).portid,
7311                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7312                                 wdev->netdev, radio_stats, &survey) < 0)
7313                         goto out;
7314                 survey_idx++;
7315         }
7316
7317  out:
7318         cb->args[2] = survey_idx;
7319         res = skb->len;
7320  out_err:
7321         nl80211_finish_wdev_dump(rdev);
7322         return res;
7323 }
7324
7325 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7326 {
7327         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7328                                   NL80211_WPA_VERSION_2));
7329 }
7330
7331 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7332 {
7333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7334         struct net_device *dev = info->user_ptr[1];
7335         struct ieee80211_channel *chan;
7336         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7337         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7338         enum nl80211_auth_type auth_type;
7339         struct key_parse key;
7340         bool local_state_change;
7341
7342         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7343                 return -EINVAL;
7344
7345         if (!info->attrs[NL80211_ATTR_MAC])
7346                 return -EINVAL;
7347
7348         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7349                 return -EINVAL;
7350
7351         if (!info->attrs[NL80211_ATTR_SSID])
7352                 return -EINVAL;
7353
7354         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7355                 return -EINVAL;
7356
7357         err = nl80211_parse_key(info, &key);
7358         if (err)
7359                 return err;
7360
7361         if (key.idx >= 0) {
7362                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7363                         return -EINVAL;
7364                 if (!key.p.key || !key.p.key_len)
7365                         return -EINVAL;
7366                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7367                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7368                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7369                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7370                         return -EINVAL;
7371                 if (key.idx > 4)
7372                         return -EINVAL;
7373         } else {
7374                 key.p.key_len = 0;
7375                 key.p.key = NULL;
7376         }
7377
7378         if (key.idx >= 0) {
7379                 int i;
7380                 bool ok = false;
7381
7382                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7383                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7384                                 ok = true;
7385                                 break;
7386                         }
7387                 }
7388                 if (!ok)
7389                         return -EINVAL;
7390         }
7391
7392         if (!rdev->ops->auth)
7393                 return -EOPNOTSUPP;
7394
7395         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7396             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7397                 return -EOPNOTSUPP;
7398
7399         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7400         chan = nl80211_get_valid_chan(&rdev->wiphy,
7401                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7402         if (!chan)
7403                 return -EINVAL;
7404
7405         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7406         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7407
7408         if (info->attrs[NL80211_ATTR_IE]) {
7409                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7410                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7411         }
7412
7413         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7414         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7415                 return -EINVAL;
7416
7417         if (auth_type == NL80211_AUTHTYPE_SAE &&
7418             !info->attrs[NL80211_ATTR_SAE_DATA])
7419                 return -EINVAL;
7420
7421         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7422                 if (auth_type != NL80211_AUTHTYPE_SAE)
7423                         return -EINVAL;
7424                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7425                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7426                 /* need to include at least Auth Transaction and Status Code */
7427                 if (sae_data_len < 4)
7428                         return -EINVAL;
7429         }
7430
7431         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7432
7433         /*
7434          * Since we no longer track auth state, ignore
7435          * requests to only change local state.
7436          */
7437         if (local_state_change)
7438                 return 0;
7439
7440         wdev_lock(dev->ieee80211_ptr);
7441         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7442                                  ssid, ssid_len, ie, ie_len,
7443                                  key.p.key, key.p.key_len, key.idx,
7444                                  sae_data, sae_data_len);
7445         wdev_unlock(dev->ieee80211_ptr);
7446         return err;
7447 }
7448
7449 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7450                                    struct genl_info *info,
7451                                    struct cfg80211_crypto_settings *settings,
7452                                    int cipher_limit)
7453 {
7454         memset(settings, 0, sizeof(*settings));
7455
7456         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7457
7458         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7459                 u16 proto;
7460
7461                 proto = nla_get_u16(
7462                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7463                 settings->control_port_ethertype = cpu_to_be16(proto);
7464                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7465                     proto != ETH_P_PAE)
7466                         return -EINVAL;
7467                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7468                         settings->control_port_no_encrypt = true;
7469         } else
7470                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7471
7472         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7473                 void *data;
7474                 int len, i;
7475
7476                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7477                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7478                 settings->n_ciphers_pairwise = len / sizeof(u32);
7479
7480                 if (len % sizeof(u32))
7481                         return -EINVAL;
7482
7483                 if (settings->n_ciphers_pairwise > cipher_limit)
7484                         return -EINVAL;
7485
7486                 memcpy(settings->ciphers_pairwise, data, len);
7487
7488                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7489                         if (!cfg80211_supported_cipher_suite(
7490                                         &rdev->wiphy,
7491                                         settings->ciphers_pairwise[i]))
7492                                 return -EINVAL;
7493         }
7494
7495         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7496                 settings->cipher_group =
7497                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7498                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7499                                                      settings->cipher_group))
7500                         return -EINVAL;
7501         }
7502
7503         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7504                 settings->wpa_versions =
7505                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7506                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7507                         return -EINVAL;
7508         }
7509
7510         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7511                 void *data;
7512                 int len;
7513
7514                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7515                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7516                 settings->n_akm_suites = len / sizeof(u32);
7517
7518                 if (len % sizeof(u32))
7519                         return -EINVAL;
7520
7521                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7522                         return -EINVAL;
7523
7524                 memcpy(settings->akm_suites, data, len);
7525         }
7526
7527         return 0;
7528 }
7529
7530 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7531 {
7532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7533         struct net_device *dev = info->user_ptr[1];
7534         struct ieee80211_channel *chan;
7535         struct cfg80211_assoc_request req = {};
7536         const u8 *bssid, *ssid;
7537         int err, ssid_len = 0;
7538
7539         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7540                 return -EINVAL;
7541
7542         if (!info->attrs[NL80211_ATTR_MAC] ||
7543             !info->attrs[NL80211_ATTR_SSID] ||
7544             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7545                 return -EINVAL;
7546
7547         if (!rdev->ops->assoc)
7548                 return -EOPNOTSUPP;
7549
7550         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7551             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7552                 return -EOPNOTSUPP;
7553
7554         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7555
7556         chan = nl80211_get_valid_chan(&rdev->wiphy,
7557                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7558         if (!chan)
7559                 return -EINVAL;
7560
7561         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7562         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7563
7564         if (info->attrs[NL80211_ATTR_IE]) {
7565                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7566                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7567         }
7568
7569         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7570                 enum nl80211_mfp mfp =
7571                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7572                 if (mfp == NL80211_MFP_REQUIRED)
7573                         req.use_mfp = true;
7574                 else if (mfp != NL80211_MFP_NO)
7575                         return -EINVAL;
7576         }
7577
7578         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7579                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7580
7581         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7582                 req.flags |= ASSOC_REQ_DISABLE_HT;
7583
7584         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7585                 memcpy(&req.ht_capa_mask,
7586                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7587                        sizeof(req.ht_capa_mask));
7588
7589         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7590                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7591                         return -EINVAL;
7592                 memcpy(&req.ht_capa,
7593                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7594                        sizeof(req.ht_capa));
7595         }
7596
7597         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7598                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7599
7600         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7601                 memcpy(&req.vht_capa_mask,
7602                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7603                        sizeof(req.vht_capa_mask));
7604
7605         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7606                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7607                         return -EINVAL;
7608                 memcpy(&req.vht_capa,
7609                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7610                        sizeof(req.vht_capa));
7611         }
7612
7613         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7614                 if (!((rdev->wiphy.features &
7615                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7616                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7617                     !wiphy_ext_feature_isset(&rdev->wiphy,
7618                                              NL80211_EXT_FEATURE_RRM))
7619                         return -EINVAL;
7620                 req.flags |= ASSOC_REQ_USE_RRM;
7621         }
7622
7623         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7624         if (!err) {
7625                 wdev_lock(dev->ieee80211_ptr);
7626                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7627                                           ssid, ssid_len, &req);
7628                 wdev_unlock(dev->ieee80211_ptr);
7629         }
7630
7631         return err;
7632 }
7633
7634 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7635 {
7636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7637         struct net_device *dev = info->user_ptr[1];
7638         const u8 *ie = NULL, *bssid;
7639         int ie_len = 0, err;
7640         u16 reason_code;
7641         bool local_state_change;
7642
7643         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7644                 return -EINVAL;
7645
7646         if (!info->attrs[NL80211_ATTR_MAC])
7647                 return -EINVAL;
7648
7649         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7650                 return -EINVAL;
7651
7652         if (!rdev->ops->deauth)
7653                 return -EOPNOTSUPP;
7654
7655         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7656             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7657                 return -EOPNOTSUPP;
7658
7659         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7660
7661         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7662         if (reason_code == 0) {
7663                 /* Reason Code 0 is reserved */
7664                 return -EINVAL;
7665         }
7666
7667         if (info->attrs[NL80211_ATTR_IE]) {
7668                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7669                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7670         }
7671
7672         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7673
7674         wdev_lock(dev->ieee80211_ptr);
7675         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7676                                    local_state_change);
7677         wdev_unlock(dev->ieee80211_ptr);
7678         return err;
7679 }
7680
7681 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7682 {
7683         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7684         struct net_device *dev = info->user_ptr[1];
7685         const u8 *ie = NULL, *bssid;
7686         int ie_len = 0, err;
7687         u16 reason_code;
7688         bool local_state_change;
7689
7690         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7691                 return -EINVAL;
7692
7693         if (!info->attrs[NL80211_ATTR_MAC])
7694                 return -EINVAL;
7695
7696         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7697                 return -EINVAL;
7698
7699         if (!rdev->ops->disassoc)
7700                 return -EOPNOTSUPP;
7701
7702         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7703             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7704                 return -EOPNOTSUPP;
7705
7706         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7707
7708         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7709         if (reason_code == 0) {
7710                 /* Reason Code 0 is reserved */
7711                 return -EINVAL;
7712         }
7713
7714         if (info->attrs[NL80211_ATTR_IE]) {
7715                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7716                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7717         }
7718
7719         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7720
7721         wdev_lock(dev->ieee80211_ptr);
7722         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7723                                      local_state_change);
7724         wdev_unlock(dev->ieee80211_ptr);
7725         return err;
7726 }
7727
7728 static bool
7729 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7730                          int mcast_rate[NUM_NL80211_BANDS],
7731                          int rateval)
7732 {
7733         struct wiphy *wiphy = &rdev->wiphy;
7734         bool found = false;
7735         int band, i;
7736
7737         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7738                 struct ieee80211_supported_band *sband;
7739
7740                 sband = wiphy->bands[band];
7741                 if (!sband)
7742                         continue;
7743
7744                 for (i = 0; i < sband->n_bitrates; i++) {
7745                         if (sband->bitrates[i].bitrate == rateval) {
7746                                 mcast_rate[band] = i + 1;
7747                                 found = true;
7748                                 break;
7749                         }
7750                 }
7751         }
7752
7753         return found;
7754 }
7755
7756 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7757 {
7758         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7759         struct net_device *dev = info->user_ptr[1];
7760         struct cfg80211_ibss_params ibss;
7761         struct wiphy *wiphy;
7762         struct cfg80211_cached_keys *connkeys = NULL;
7763         int err;
7764
7765         memset(&ibss, 0, sizeof(ibss));
7766
7767         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7768                 return -EINVAL;
7769
7770         if (!info->attrs[NL80211_ATTR_SSID] ||
7771             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7772                 return -EINVAL;
7773
7774         ibss.beacon_interval = 100;
7775
7776         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7777                 ibss.beacon_interval =
7778                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7779                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7780                         return -EINVAL;
7781         }
7782
7783         if (!rdev->ops->join_ibss)
7784                 return -EOPNOTSUPP;
7785
7786         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7787                 return -EOPNOTSUPP;
7788
7789         wiphy = &rdev->wiphy;
7790
7791         if (info->attrs[NL80211_ATTR_MAC]) {
7792                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7793
7794                 if (!is_valid_ether_addr(ibss.bssid))
7795                         return -EINVAL;
7796         }
7797         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7798         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7799
7800         if (info->attrs[NL80211_ATTR_IE]) {
7801                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7802                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7803         }
7804
7805         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7806         if (err)
7807                 return err;
7808
7809         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7810                                      NL80211_IFTYPE_ADHOC))
7811                 return -EINVAL;
7812
7813         switch (ibss.chandef.width) {
7814         case NL80211_CHAN_WIDTH_5:
7815         case NL80211_CHAN_WIDTH_10:
7816         case NL80211_CHAN_WIDTH_20_NOHT:
7817                 break;
7818         case NL80211_CHAN_WIDTH_20:
7819         case NL80211_CHAN_WIDTH_40:
7820                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7821                         return -EINVAL;
7822                 break;
7823         case NL80211_CHAN_WIDTH_80:
7824         case NL80211_CHAN_WIDTH_80P80:
7825         case NL80211_CHAN_WIDTH_160:
7826                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7827                         return -EINVAL;
7828                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7829                                              NL80211_EXT_FEATURE_VHT_IBSS))
7830                         return -EINVAL;
7831                 break;
7832         default:
7833                 return -EINVAL;
7834         }
7835
7836         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7837         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7838
7839         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7840                 u8 *rates =
7841                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7842                 int n_rates =
7843                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7844                 struct ieee80211_supported_band *sband =
7845                         wiphy->bands[ibss.chandef.chan->band];
7846
7847                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7848                                              &ibss.basic_rates);
7849                 if (err)
7850                         return err;
7851         }
7852
7853         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7854                 memcpy(&ibss.ht_capa_mask,
7855                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7856                        sizeof(ibss.ht_capa_mask));
7857
7858         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7859                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7860                         return -EINVAL;
7861                 memcpy(&ibss.ht_capa,
7862                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7863                        sizeof(ibss.ht_capa));
7864         }
7865
7866         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7867             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7868                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7869                 return -EINVAL;
7870
7871         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7872                 bool no_ht = false;
7873
7874                 connkeys = nl80211_parse_connkeys(rdev,
7875                                           info->attrs[NL80211_ATTR_KEYS],
7876                                           &no_ht);
7877                 if (IS_ERR(connkeys))
7878                         return PTR_ERR(connkeys);
7879
7880                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7881                     no_ht) {
7882                         kzfree(connkeys);
7883                         return -EINVAL;
7884                 }
7885         }
7886
7887         ibss.control_port =
7888                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7889
7890         ibss.userspace_handles_dfs =
7891                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7892
7893         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7894         if (err)
7895                 kzfree(connkeys);
7896         return err;
7897 }
7898
7899 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7900 {
7901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7902         struct net_device *dev = info->user_ptr[1];
7903
7904         if (!rdev->ops->leave_ibss)
7905                 return -EOPNOTSUPP;
7906
7907         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7908                 return -EOPNOTSUPP;
7909
7910         return cfg80211_leave_ibss(rdev, dev, false);
7911 }
7912
7913 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7914 {
7915         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7916         struct net_device *dev = info->user_ptr[1];
7917         int mcast_rate[NUM_NL80211_BANDS];
7918         u32 nla_rate;
7919         int err;
7920
7921         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7922             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7923             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7924                 return -EOPNOTSUPP;
7925
7926         if (!rdev->ops->set_mcast_rate)
7927                 return -EOPNOTSUPP;
7928
7929         memset(mcast_rate, 0, sizeof(mcast_rate));
7930
7931         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7932                 return -EINVAL;
7933
7934         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7935         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7936                 return -EINVAL;
7937
7938         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7939
7940         return err;
7941 }
7942
7943 static struct sk_buff *
7944 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7945                             struct wireless_dev *wdev, int approxlen,
7946                             u32 portid, u32 seq, enum nl80211_commands cmd,
7947                             enum nl80211_attrs attr,
7948                             const struct nl80211_vendor_cmd_info *info,
7949                             gfp_t gfp)
7950 {
7951         struct sk_buff *skb;
7952         void *hdr;
7953         struct nlattr *data;
7954
7955         skb = nlmsg_new(approxlen + 100, gfp);
7956         if (!skb)
7957                 return NULL;
7958
7959         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7960         if (!hdr) {
7961                 kfree_skb(skb);
7962                 return NULL;
7963         }
7964
7965         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7966                 goto nla_put_failure;
7967
7968         if (info) {
7969                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7970                                 info->vendor_id))
7971                         goto nla_put_failure;
7972                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7973                                 info->subcmd))
7974                         goto nla_put_failure;
7975         }
7976
7977         if (wdev) {
7978                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7979                                       wdev_id(wdev), NL80211_ATTR_PAD))
7980                         goto nla_put_failure;
7981                 if (wdev->netdev &&
7982                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7983                                 wdev->netdev->ifindex))
7984                         goto nla_put_failure;
7985         }
7986
7987         data = nla_nest_start(skb, attr);
7988
7989         ((void **)skb->cb)[0] = rdev;
7990         ((void **)skb->cb)[1] = hdr;
7991         ((void **)skb->cb)[2] = data;
7992
7993         return skb;
7994
7995  nla_put_failure:
7996         kfree_skb(skb);
7997         return NULL;
7998 }
7999
8000 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8001                                            struct wireless_dev *wdev,
8002                                            enum nl80211_commands cmd,
8003                                            enum nl80211_attrs attr,
8004                                            int vendor_event_idx,
8005                                            int approxlen, gfp_t gfp)
8006 {
8007         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8008         const struct nl80211_vendor_cmd_info *info;
8009
8010         switch (cmd) {
8011         case NL80211_CMD_TESTMODE:
8012                 if (WARN_ON(vendor_event_idx != -1))
8013                         return NULL;
8014                 info = NULL;
8015                 break;
8016         case NL80211_CMD_VENDOR:
8017                 if (WARN_ON(vendor_event_idx < 0 ||
8018                             vendor_event_idx >= wiphy->n_vendor_events))
8019                         return NULL;
8020                 info = &wiphy->vendor_events[vendor_event_idx];
8021                 break;
8022         default:
8023                 WARN_ON(1);
8024                 return NULL;
8025         }
8026
8027         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8028                                            cmd, attr, info, gfp);
8029 }
8030 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8031
8032 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8033 {
8034         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8035         void *hdr = ((void **)skb->cb)[1];
8036         struct nlattr *data = ((void **)skb->cb)[2];
8037         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8038
8039         /* clear CB data for netlink core to own from now on */
8040         memset(skb->cb, 0, sizeof(skb->cb));
8041
8042         nla_nest_end(skb, data);
8043         genlmsg_end(skb, hdr);
8044
8045         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8046                 mcgrp = NL80211_MCGRP_VENDOR;
8047
8048         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8049                                 mcgrp, gfp);
8050 }
8051 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8052
8053 #ifdef CONFIG_NL80211_TESTMODE
8054 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8055 {
8056         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8057         struct wireless_dev *wdev =
8058                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8059         int err;
8060
8061         if (!rdev->ops->testmode_cmd)
8062                 return -EOPNOTSUPP;
8063
8064         if (IS_ERR(wdev)) {
8065                 err = PTR_ERR(wdev);
8066                 if (err != -EINVAL)
8067                         return err;
8068                 wdev = NULL;
8069         } else if (wdev->wiphy != &rdev->wiphy) {
8070                 return -EINVAL;
8071         }
8072
8073         if (!info->attrs[NL80211_ATTR_TESTDATA])
8074                 return -EINVAL;
8075
8076         rdev->cur_cmd_info = info;
8077         err = rdev_testmode_cmd(rdev, wdev,
8078                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8079                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8080         rdev->cur_cmd_info = NULL;
8081
8082         return err;
8083 }
8084
8085 static int nl80211_testmode_dump(struct sk_buff *skb,
8086                                  struct netlink_callback *cb)
8087 {
8088         struct cfg80211_registered_device *rdev;
8089         int err;
8090         long phy_idx;
8091         void *data = NULL;
8092         int data_len = 0;
8093
8094         rtnl_lock();
8095
8096         if (cb->args[0]) {
8097                 /*
8098                  * 0 is a valid index, but not valid for args[0],
8099                  * so we need to offset by 1.
8100                  */
8101                 phy_idx = cb->args[0] - 1;
8102         } else {
8103                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8104                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8105                                   nl80211_policy);
8106                 if (err)
8107                         goto out_err;
8108
8109                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8110                                                   nl80211_fam.attrbuf);
8111                 if (IS_ERR(rdev)) {
8112                         err = PTR_ERR(rdev);
8113                         goto out_err;
8114                 }
8115                 phy_idx = rdev->wiphy_idx;
8116                 rdev = NULL;
8117
8118                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8119                         cb->args[1] =
8120                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8121         }
8122
8123         if (cb->args[1]) {
8124                 data = nla_data((void *)cb->args[1]);
8125                 data_len = nla_len((void *)cb->args[1]);
8126         }
8127
8128         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8129         if (!rdev) {
8130                 err = -ENOENT;
8131                 goto out_err;
8132         }
8133
8134         if (!rdev->ops->testmode_dump) {
8135                 err = -EOPNOTSUPP;
8136                 goto out_err;
8137         }
8138
8139         while (1) {
8140                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8141                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8142                                            NL80211_CMD_TESTMODE);
8143                 struct nlattr *tmdata;
8144
8145                 if (!hdr)
8146                         break;
8147
8148                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8149                         genlmsg_cancel(skb, hdr);
8150                         break;
8151                 }
8152
8153                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8154                 if (!tmdata) {
8155                         genlmsg_cancel(skb, hdr);
8156                         break;
8157                 }
8158                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8159                 nla_nest_end(skb, tmdata);
8160
8161                 if (err == -ENOBUFS || err == -ENOENT) {
8162                         genlmsg_cancel(skb, hdr);
8163                         break;
8164                 } else if (err) {
8165                         genlmsg_cancel(skb, hdr);
8166                         goto out_err;
8167                 }
8168
8169                 genlmsg_end(skb, hdr);
8170         }
8171
8172         err = skb->len;
8173         /* see above */
8174         cb->args[0] = phy_idx + 1;
8175  out_err:
8176         rtnl_unlock();
8177         return err;
8178 }
8179 #endif
8180
8181 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8182 {
8183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8184         struct net_device *dev = info->user_ptr[1];
8185         struct cfg80211_connect_params connect;
8186         struct wiphy *wiphy;
8187         struct cfg80211_cached_keys *connkeys = NULL;
8188         int err;
8189
8190         memset(&connect, 0, sizeof(connect));
8191
8192         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8193                 return -EINVAL;
8194
8195         if (!info->attrs[NL80211_ATTR_SSID] ||
8196             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8197                 return -EINVAL;
8198
8199         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8200                 connect.auth_type =
8201                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8202                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8203                                              NL80211_CMD_CONNECT))
8204                         return -EINVAL;
8205         } else
8206                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8207
8208         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8209
8210         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8211                                       NL80211_MAX_NR_CIPHER_SUITES);
8212         if (err)
8213                 return err;
8214
8215         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8216             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8217                 return -EOPNOTSUPP;
8218
8219         wiphy = &rdev->wiphy;
8220
8221         connect.bg_scan_period = -1;
8222         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8223                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8224                 connect.bg_scan_period =
8225                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8226         }
8227
8228         if (info->attrs[NL80211_ATTR_MAC])
8229                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8230         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8231                 connect.bssid_hint =
8232                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8233         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8234         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8235
8236         if (info->attrs[NL80211_ATTR_IE]) {
8237                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8238                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8239         }
8240
8241         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8242                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8243                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8244                     connect.mfp != NL80211_MFP_NO)
8245                         return -EINVAL;
8246         } else {
8247                 connect.mfp = NL80211_MFP_NO;
8248         }
8249
8250         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8251                 connect.prev_bssid =
8252                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8253
8254         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8255                 connect.channel = nl80211_get_valid_chan(
8256                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8257                 if (!connect.channel)
8258                         return -EINVAL;
8259         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8260                 connect.channel_hint = nl80211_get_valid_chan(
8261                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8262                 if (!connect.channel_hint)
8263                         return -EINVAL;
8264         }
8265
8266         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8267                 connkeys = nl80211_parse_connkeys(rdev,
8268                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8269                 if (IS_ERR(connkeys))
8270                         return PTR_ERR(connkeys);
8271         }
8272
8273         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8274                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8275
8276         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8277                 memcpy(&connect.ht_capa_mask,
8278                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8279                        sizeof(connect.ht_capa_mask));
8280
8281         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8282                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8283                         kzfree(connkeys);
8284                         return -EINVAL;
8285                 }
8286                 memcpy(&connect.ht_capa,
8287                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8288                        sizeof(connect.ht_capa));
8289         }
8290
8291         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8292                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8293
8294         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8295                 memcpy(&connect.vht_capa_mask,
8296                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8297                        sizeof(connect.vht_capa_mask));
8298
8299         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8300                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8301                         kzfree(connkeys);
8302                         return -EINVAL;
8303                 }
8304                 memcpy(&connect.vht_capa,
8305                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8306                        sizeof(connect.vht_capa));
8307         }
8308
8309         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8310                 if (!((rdev->wiphy.features &
8311                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8312                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8313                     !wiphy_ext_feature_isset(&rdev->wiphy,
8314                                              NL80211_EXT_FEATURE_RRM)) {
8315                         kzfree(connkeys);
8316                         return -EINVAL;
8317                 }
8318                 connect.flags |= ASSOC_REQ_USE_RRM;
8319         }
8320
8321         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8322         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8323                 kzfree(connkeys);
8324                 return -EOPNOTSUPP;
8325         }
8326
8327         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8328                 /* bss selection makes no sense if bssid is set */
8329                 if (connect.bssid) {
8330                         kzfree(connkeys);
8331                         return -EINVAL;
8332                 }
8333
8334                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8335                                        wiphy, &connect.bss_select);
8336                 if (err) {
8337                         kzfree(connkeys);
8338                         return err;
8339                 }
8340         }
8341
8342         wdev_lock(dev->ieee80211_ptr);
8343         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8344                                connect.prev_bssid);
8345         wdev_unlock(dev->ieee80211_ptr);
8346         if (err)
8347                 kzfree(connkeys);
8348         return err;
8349 }
8350
8351 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8352 {
8353         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8354         struct net_device *dev = info->user_ptr[1];
8355         u16 reason;
8356         int ret;
8357
8358         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8359                 reason = WLAN_REASON_DEAUTH_LEAVING;
8360         else
8361                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8362
8363         if (reason == 0)
8364                 return -EINVAL;
8365
8366         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8367             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8368                 return -EOPNOTSUPP;
8369
8370         wdev_lock(dev->ieee80211_ptr);
8371         ret = cfg80211_disconnect(rdev, dev, reason, true);
8372         wdev_unlock(dev->ieee80211_ptr);
8373         return ret;
8374 }
8375
8376 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8377 {
8378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8379         struct net *net;
8380         int err;
8381
8382         if (info->attrs[NL80211_ATTR_PID]) {
8383                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8384
8385                 net = get_net_ns_by_pid(pid);
8386         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8387                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8388
8389                 net = get_net_ns_by_fd(fd);
8390         } else {
8391                 return -EINVAL;
8392         }
8393
8394         if (IS_ERR(net))
8395                 return PTR_ERR(net);
8396
8397         err = 0;
8398
8399         /* check if anything to do */
8400         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8401                 err = cfg80211_switch_netns(rdev, net);
8402
8403         put_net(net);
8404         return err;
8405 }
8406
8407 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8408 {
8409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8410         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8411                         struct cfg80211_pmksa *pmksa) = NULL;
8412         struct net_device *dev = info->user_ptr[1];
8413         struct cfg80211_pmksa pmksa;
8414
8415         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8416
8417         if (!info->attrs[NL80211_ATTR_MAC])
8418                 return -EINVAL;
8419
8420         if (!info->attrs[NL80211_ATTR_PMKID])
8421                 return -EINVAL;
8422
8423         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8424         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8425
8426         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8427             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8428                 return -EOPNOTSUPP;
8429
8430         switch (info->genlhdr->cmd) {
8431         case NL80211_CMD_SET_PMKSA:
8432                 rdev_ops = rdev->ops->set_pmksa;
8433                 break;
8434         case NL80211_CMD_DEL_PMKSA:
8435                 rdev_ops = rdev->ops->del_pmksa;
8436                 break;
8437         default:
8438                 WARN_ON(1);
8439                 break;
8440         }
8441
8442         if (!rdev_ops)
8443                 return -EOPNOTSUPP;
8444
8445         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8446 }
8447
8448 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8449 {
8450         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8451         struct net_device *dev = info->user_ptr[1];
8452
8453         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8454             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8455                 return -EOPNOTSUPP;
8456
8457         if (!rdev->ops->flush_pmksa)
8458                 return -EOPNOTSUPP;
8459
8460         return rdev_flush_pmksa(rdev, dev);
8461 }
8462
8463 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8464 {
8465         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8466         struct net_device *dev = info->user_ptr[1];
8467         u8 action_code, dialog_token;
8468         u32 peer_capability = 0;
8469         u16 status_code;
8470         u8 *peer;
8471         bool initiator;
8472
8473         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8474             !rdev->ops->tdls_mgmt)
8475                 return -EOPNOTSUPP;
8476
8477         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8478             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8479             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8480             !info->attrs[NL80211_ATTR_IE] ||
8481             !info->attrs[NL80211_ATTR_MAC])
8482                 return -EINVAL;
8483
8484         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8485         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8486         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8487         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8488         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8489         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8490                 peer_capability =
8491                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8492
8493         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8494                               dialog_token, status_code, peer_capability,
8495                               initiator,
8496                               nla_data(info->attrs[NL80211_ATTR_IE]),
8497                               nla_len(info->attrs[NL80211_ATTR_IE]));
8498 }
8499
8500 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8501 {
8502         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8503         struct net_device *dev = info->user_ptr[1];
8504         enum nl80211_tdls_operation operation;
8505         u8 *peer;
8506
8507         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8508             !rdev->ops->tdls_oper)
8509                 return -EOPNOTSUPP;
8510
8511         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8512             !info->attrs[NL80211_ATTR_MAC])
8513                 return -EINVAL;
8514
8515         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8516         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8517
8518         return rdev_tdls_oper(rdev, dev, peer, operation);
8519 }
8520
8521 static int nl80211_remain_on_channel(struct sk_buff *skb,
8522                                      struct genl_info *info)
8523 {
8524         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8525         struct wireless_dev *wdev = info->user_ptr[1];
8526         struct cfg80211_chan_def chandef;
8527         struct sk_buff *msg;
8528         void *hdr;
8529         u64 cookie;
8530         u32 duration;
8531         int err;
8532
8533         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8534             !info->attrs[NL80211_ATTR_DURATION])
8535                 return -EINVAL;
8536
8537         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8538
8539         if (!rdev->ops->remain_on_channel ||
8540             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8541                 return -EOPNOTSUPP;
8542
8543         /*
8544          * We should be on that channel for at least a minimum amount of
8545          * time (10ms) but no longer than the driver supports.
8546          */
8547         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8548             duration > rdev->wiphy.max_remain_on_channel_duration)
8549                 return -EINVAL;
8550
8551         err = nl80211_parse_chandef(rdev, info, &chandef);
8552         if (err)
8553                 return err;
8554
8555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8556         if (!msg)
8557                 return -ENOMEM;
8558
8559         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8560                              NL80211_CMD_REMAIN_ON_CHANNEL);
8561         if (!hdr) {
8562                 err = -ENOBUFS;
8563                 goto free_msg;
8564         }
8565
8566         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8567                                      duration, &cookie);
8568
8569         if (err)
8570                 goto free_msg;
8571
8572         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8573                               NL80211_ATTR_PAD))
8574                 goto nla_put_failure;
8575
8576         genlmsg_end(msg, hdr);
8577
8578         return genlmsg_reply(msg, info);
8579
8580  nla_put_failure:
8581         err = -ENOBUFS;
8582  free_msg:
8583         nlmsg_free(msg);
8584         return err;
8585 }
8586
8587 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8588                                             struct genl_info *info)
8589 {
8590         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8591         struct wireless_dev *wdev = info->user_ptr[1];
8592         u64 cookie;
8593
8594         if (!info->attrs[NL80211_ATTR_COOKIE])
8595                 return -EINVAL;
8596
8597         if (!rdev->ops->cancel_remain_on_channel)
8598                 return -EOPNOTSUPP;
8599
8600         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8601
8602         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8603 }
8604
8605 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8606                            u8 *rates, u8 rates_len)
8607 {
8608         u8 i;
8609         u32 mask = 0;
8610
8611         for (i = 0; i < rates_len; i++) {
8612                 int rate = (rates[i] & 0x7f) * 5;
8613                 int ridx;
8614
8615                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8616                         struct ieee80211_rate *srate =
8617                                 &sband->bitrates[ridx];
8618                         if (rate == srate->bitrate) {
8619                                 mask |= 1 << ridx;
8620                                 break;
8621                         }
8622                 }
8623                 if (ridx == sband->n_bitrates)
8624                         return 0; /* rate not found */
8625         }
8626
8627         return mask;
8628 }
8629
8630 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8631                                u8 *rates, u8 rates_len,
8632                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8633 {
8634         u8 i;
8635
8636         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8637
8638         for (i = 0; i < rates_len; i++) {
8639                 int ridx, rbit;
8640
8641                 ridx = rates[i] / 8;
8642                 rbit = BIT(rates[i] % 8);
8643
8644                 /* check validity */
8645                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8646                         return false;
8647
8648                 /* check availability */
8649                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8650                         mcs[ridx] |= rbit;
8651                 else
8652                         return false;
8653         }
8654
8655         return true;
8656 }
8657
8658 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8659 {
8660         u16 mcs_mask = 0;
8661
8662         switch (vht_mcs_map) {
8663         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8664                 break;
8665         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8666                 mcs_mask = 0x00FF;
8667                 break;
8668         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8669                 mcs_mask = 0x01FF;
8670                 break;
8671         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8672                 mcs_mask = 0x03FF;
8673                 break;
8674         default:
8675                 break;
8676         }
8677
8678         return mcs_mask;
8679 }
8680
8681 static void vht_build_mcs_mask(u16 vht_mcs_map,
8682                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8683 {
8684         u8 nss;
8685
8686         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8687                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8688                 vht_mcs_map >>= 2;
8689         }
8690 }
8691
8692 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8693                              struct nl80211_txrate_vht *txrate,
8694                              u16 mcs[NL80211_VHT_NSS_MAX])
8695 {
8696         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8697         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8698         u8 i;
8699
8700         if (!sband->vht_cap.vht_supported)
8701                 return false;
8702
8703         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8704
8705         /* Build vht_mcs_mask from VHT capabilities */
8706         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8707
8708         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8709                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8710                         mcs[i] = txrate->mcs[i];
8711                 else
8712                         return false;
8713         }
8714
8715         return true;
8716 }
8717
8718 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8719         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8720                                     .len = NL80211_MAX_SUPP_RATES },
8721         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8722                                 .len = NL80211_MAX_SUPP_HT_RATES },
8723         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8724         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8725 };
8726
8727 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8728                                        struct genl_info *info)
8729 {
8730         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8732         struct cfg80211_bitrate_mask mask;
8733         int rem, i;
8734         struct net_device *dev = info->user_ptr[1];
8735         struct nlattr *tx_rates;
8736         struct ieee80211_supported_band *sband;
8737         u16 vht_tx_mcs_map;
8738
8739         if (!rdev->ops->set_bitrate_mask)
8740                 return -EOPNOTSUPP;
8741
8742         memset(&mask, 0, sizeof(mask));
8743         /* Default to all rates enabled */
8744         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8745                 sband = rdev->wiphy.bands[i];
8746
8747                 if (!sband)
8748                         continue;
8749
8750                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8751                 memcpy(mask.control[i].ht_mcs,
8752                        sband->ht_cap.mcs.rx_mask,
8753                        sizeof(mask.control[i].ht_mcs));
8754
8755                 if (!sband->vht_cap.vht_supported)
8756                         continue;
8757
8758                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8759                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8760         }
8761
8762         /* if no rates are given set it back to the defaults */
8763         if (!info->attrs[NL80211_ATTR_TX_RATES])
8764                 goto out;
8765
8766         /*
8767          * The nested attribute uses enum nl80211_band as the index. This maps
8768          * directly to the enum nl80211_band values used in cfg80211.
8769          */
8770         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8771         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8772                 enum nl80211_band band = nla_type(tx_rates);
8773                 int err;
8774
8775                 if (band < 0 || band >= NUM_NL80211_BANDS)
8776                         return -EINVAL;
8777                 sband = rdev->wiphy.bands[band];
8778                 if (sband == NULL)
8779                         return -EINVAL;
8780                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8781                                 nla_len(tx_rates), nl80211_txattr_policy);
8782                 if (err)
8783                         return err;
8784                 if (tb[NL80211_TXRATE_LEGACY]) {
8785                         mask.control[band].legacy = rateset_to_mask(
8786                                 sband,
8787                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8788                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8789                         if ((mask.control[band].legacy == 0) &&
8790                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8791                                 return -EINVAL;
8792                 }
8793                 if (tb[NL80211_TXRATE_HT]) {
8794                         if (!ht_rateset_to_mask(
8795                                         sband,
8796                                         nla_data(tb[NL80211_TXRATE_HT]),
8797                                         nla_len(tb[NL80211_TXRATE_HT]),
8798                                         mask.control[band].ht_mcs))
8799                                 return -EINVAL;
8800                 }
8801                 if (tb[NL80211_TXRATE_VHT]) {
8802                         if (!vht_set_mcs_mask(
8803                                         sband,
8804                                         nla_data(tb[NL80211_TXRATE_VHT]),
8805                                         mask.control[band].vht_mcs))
8806                                 return -EINVAL;
8807                 }
8808                 if (tb[NL80211_TXRATE_GI]) {
8809                         mask.control[band].gi =
8810                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8811                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8812                                 return -EINVAL;
8813                 }
8814
8815                 if (mask.control[band].legacy == 0) {
8816                         /* don't allow empty legacy rates if HT or VHT
8817                          * are not even supported.
8818                          */
8819                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8820                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8821                                 return -EINVAL;
8822
8823                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8824                                 if (mask.control[band].ht_mcs[i])
8825                                         goto out;
8826
8827                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8828                                 if (mask.control[band].vht_mcs[i])
8829                                         goto out;
8830
8831                         /* legacy and mcs rates may not be both empty */
8832                         return -EINVAL;
8833                 }
8834         }
8835
8836 out:
8837         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8838 }
8839
8840 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8841 {
8842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8843         struct wireless_dev *wdev = info->user_ptr[1];
8844         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8845
8846         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8847                 return -EINVAL;
8848
8849         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8850                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8851
8852         switch (wdev->iftype) {
8853         case NL80211_IFTYPE_STATION:
8854         case NL80211_IFTYPE_ADHOC:
8855         case NL80211_IFTYPE_P2P_CLIENT:
8856         case NL80211_IFTYPE_AP:
8857         case NL80211_IFTYPE_AP_VLAN:
8858         case NL80211_IFTYPE_MESH_POINT:
8859         case NL80211_IFTYPE_P2P_GO:
8860         case NL80211_IFTYPE_P2P_DEVICE:
8861                 break;
8862         default:
8863                 return -EOPNOTSUPP;
8864         }
8865
8866         /* not much point in registering if we can't reply */
8867         if (!rdev->ops->mgmt_tx)
8868                 return -EOPNOTSUPP;
8869
8870         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8871                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8872                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8873 }
8874
8875 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8876 {
8877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8878         struct wireless_dev *wdev = info->user_ptr[1];
8879         struct cfg80211_chan_def chandef;
8880         int err;
8881         void *hdr = NULL;
8882         u64 cookie;
8883         struct sk_buff *msg = NULL;
8884         struct cfg80211_mgmt_tx_params params = {
8885                 .dont_wait_for_ack =
8886                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8887         };
8888
8889         if (!info->attrs[NL80211_ATTR_FRAME])
8890                 return -EINVAL;
8891
8892         if (!rdev->ops->mgmt_tx)
8893                 return -EOPNOTSUPP;
8894
8895         switch (wdev->iftype) {
8896         case NL80211_IFTYPE_P2P_DEVICE:
8897                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8898                         return -EINVAL;
8899         case NL80211_IFTYPE_STATION:
8900         case NL80211_IFTYPE_ADHOC:
8901         case NL80211_IFTYPE_P2P_CLIENT:
8902         case NL80211_IFTYPE_AP:
8903         case NL80211_IFTYPE_AP_VLAN:
8904         case NL80211_IFTYPE_MESH_POINT:
8905         case NL80211_IFTYPE_P2P_GO:
8906                 break;
8907         default:
8908                 return -EOPNOTSUPP;
8909         }
8910
8911         if (info->attrs[NL80211_ATTR_DURATION]) {
8912                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8913                         return -EINVAL;
8914                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8915
8916                 /*
8917                  * We should wait on the channel for at least a minimum amount
8918                  * of time (10ms) but no longer than the driver supports.
8919                  */
8920                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8921                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8922                         return -EINVAL;
8923         }
8924
8925         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8926
8927         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8928                 return -EINVAL;
8929
8930         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8931
8932         /* get the channel if any has been specified, otherwise pass NULL to
8933          * the driver. The latter will use the current one
8934          */
8935         chandef.chan = NULL;
8936         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8937                 err = nl80211_parse_chandef(rdev, info, &chandef);
8938                 if (err)
8939                         return err;
8940         }
8941
8942         if (!chandef.chan && params.offchan)
8943                 return -EINVAL;
8944
8945         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8946         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8947
8948         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8949                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8950                 int i;
8951
8952                 if (len % sizeof(u16))
8953                         return -EINVAL;
8954
8955                 params.n_csa_offsets = len / sizeof(u16);
8956                 params.csa_offsets =
8957                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8958
8959                 /* check that all the offsets fit the frame */
8960                 for (i = 0; i < params.n_csa_offsets; i++) {
8961                         if (params.csa_offsets[i] >= params.len)
8962                                 return -EINVAL;
8963                 }
8964         }
8965
8966         if (!params.dont_wait_for_ack) {
8967                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8968                 if (!msg)
8969                         return -ENOMEM;
8970
8971                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8972                                      NL80211_CMD_FRAME);
8973                 if (!hdr) {
8974                         err = -ENOBUFS;
8975                         goto free_msg;
8976                 }
8977         }
8978
8979         params.chan = chandef.chan;
8980         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8981         if (err)
8982                 goto free_msg;
8983
8984         if (msg) {
8985                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8986                                       NL80211_ATTR_PAD))
8987                         goto nla_put_failure;
8988
8989                 genlmsg_end(msg, hdr);
8990                 return genlmsg_reply(msg, info);
8991         }
8992
8993         return 0;
8994
8995  nla_put_failure:
8996         err = -ENOBUFS;
8997  free_msg:
8998         nlmsg_free(msg);
8999         return err;
9000 }
9001
9002 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9003 {
9004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9005         struct wireless_dev *wdev = info->user_ptr[1];
9006         u64 cookie;
9007
9008         if (!info->attrs[NL80211_ATTR_COOKIE])
9009                 return -EINVAL;
9010
9011         if (!rdev->ops->mgmt_tx_cancel_wait)
9012                 return -EOPNOTSUPP;
9013
9014         switch (wdev->iftype) {
9015         case NL80211_IFTYPE_STATION:
9016         case NL80211_IFTYPE_ADHOC:
9017         case NL80211_IFTYPE_P2P_CLIENT:
9018         case NL80211_IFTYPE_AP:
9019         case NL80211_IFTYPE_AP_VLAN:
9020         case NL80211_IFTYPE_P2P_GO:
9021         case NL80211_IFTYPE_P2P_DEVICE:
9022                 break;
9023         default:
9024                 return -EOPNOTSUPP;
9025         }
9026
9027         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9028
9029         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9030 }
9031
9032 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9033 {
9034         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9035         struct wireless_dev *wdev;
9036         struct net_device *dev = info->user_ptr[1];
9037         u8 ps_state;
9038         bool state;
9039         int err;
9040
9041         if (!info->attrs[NL80211_ATTR_PS_STATE])
9042                 return -EINVAL;
9043
9044         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9045
9046         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9047                 return -EINVAL;
9048
9049         wdev = dev->ieee80211_ptr;
9050
9051         if (!rdev->ops->set_power_mgmt)
9052                 return -EOPNOTSUPP;
9053
9054         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9055
9056         if (state == wdev->ps)
9057                 return 0;
9058
9059         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9060         if (!err)
9061                 wdev->ps = state;
9062         return err;
9063 }
9064
9065 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9066 {
9067         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9068         enum nl80211_ps_state ps_state;
9069         struct wireless_dev *wdev;
9070         struct net_device *dev = info->user_ptr[1];
9071         struct sk_buff *msg;
9072         void *hdr;
9073         int err;
9074
9075         wdev = dev->ieee80211_ptr;
9076
9077         if (!rdev->ops->set_power_mgmt)
9078                 return -EOPNOTSUPP;
9079
9080         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9081         if (!msg)
9082                 return -ENOMEM;
9083
9084         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9085                              NL80211_CMD_GET_POWER_SAVE);
9086         if (!hdr) {
9087                 err = -ENOBUFS;
9088                 goto free_msg;
9089         }
9090
9091         if (wdev->ps)
9092                 ps_state = NL80211_PS_ENABLED;
9093         else
9094                 ps_state = NL80211_PS_DISABLED;
9095
9096         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9097                 goto nla_put_failure;
9098
9099         genlmsg_end(msg, hdr);
9100         return genlmsg_reply(msg, info);
9101
9102  nla_put_failure:
9103         err = -ENOBUFS;
9104  free_msg:
9105         nlmsg_free(msg);
9106         return err;
9107 }
9108
9109 static const struct nla_policy
9110 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9111         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9112         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9113         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9114         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9115         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9116         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9117 };
9118
9119 static int nl80211_set_cqm_txe(struct genl_info *info,
9120                                u32 rate, u32 pkts, u32 intvl)
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 (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9127                 return -EINVAL;
9128
9129         if (!rdev->ops->set_cqm_txe_config)
9130                 return -EOPNOTSUPP;
9131
9132         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9133             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9134                 return -EOPNOTSUPP;
9135
9136         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9137 }
9138
9139 static int nl80211_set_cqm_rssi(struct genl_info *info,
9140                                 s32 threshold, u32 hysteresis)
9141 {
9142         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9143         struct net_device *dev = info->user_ptr[1];
9144         struct wireless_dev *wdev = dev->ieee80211_ptr;
9145
9146         if (threshold > 0)
9147                 return -EINVAL;
9148
9149         /* disabling - hysteresis should also be zero then */
9150         if (threshold == 0)
9151                 hysteresis = 0;
9152
9153         if (!rdev->ops->set_cqm_rssi_config)
9154                 return -EOPNOTSUPP;
9155
9156         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9157             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9158                 return -EOPNOTSUPP;
9159
9160         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9161 }
9162
9163 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9164 {
9165         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9166         struct nlattr *cqm;
9167         int err;
9168
9169         cqm = info->attrs[NL80211_ATTR_CQM];
9170         if (!cqm)
9171                 return -EINVAL;
9172
9173         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9174                                nl80211_attr_cqm_policy);
9175         if (err)
9176                 return err;
9177
9178         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9179             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9180                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9181                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9182
9183                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9184         }
9185
9186         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9187             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9188             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9189                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9190                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9191                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9192
9193                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9194         }
9195
9196         return -EINVAL;
9197 }
9198
9199 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9200 {
9201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9202         struct net_device *dev = info->user_ptr[1];
9203         struct ocb_setup setup = {};
9204         int err;
9205
9206         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9207         if (err)
9208                 return err;
9209
9210         return cfg80211_join_ocb(rdev, dev, &setup);
9211 }
9212
9213 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9214 {
9215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9216         struct net_device *dev = info->user_ptr[1];
9217
9218         return cfg80211_leave_ocb(rdev, dev);
9219 }
9220
9221 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9222 {
9223         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9224         struct net_device *dev = info->user_ptr[1];
9225         struct mesh_config cfg;
9226         struct mesh_setup setup;
9227         int err;
9228
9229         /* start with default */
9230         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9231         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9232
9233         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9234                 /* and parse parameters if given */
9235                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9236                 if (err)
9237                         return err;
9238         }
9239
9240         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9241             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9242                 return -EINVAL;
9243
9244         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9245         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9246
9247         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9248             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9249                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9250                         return -EINVAL;
9251
9252         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9253                 setup.beacon_interval =
9254                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9255                 if (setup.beacon_interval < 10 ||
9256                     setup.beacon_interval > 10000)
9257                         return -EINVAL;
9258         }
9259
9260         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9261                 setup.dtim_period =
9262                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9263                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9264                         return -EINVAL;
9265         }
9266
9267         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9268                 /* parse additional setup parameters if given */
9269                 err = nl80211_parse_mesh_setup(info, &setup);
9270                 if (err)
9271                         return err;
9272         }
9273
9274         if (setup.user_mpm)
9275                 cfg.auto_open_plinks = false;
9276
9277         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9278                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9279                 if (err)
9280                         return err;
9281         } else {
9282                 /* cfg80211_join_mesh() will sort it out */
9283                 setup.chandef.chan = NULL;
9284         }
9285
9286         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9287                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9288                 int n_rates =
9289                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9290                 struct ieee80211_supported_band *sband;
9291
9292                 if (!setup.chandef.chan)
9293                         return -EINVAL;
9294
9295                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9296
9297                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9298                                              &setup.basic_rates);
9299                 if (err)
9300                         return err;
9301         }
9302
9303         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9304 }
9305
9306 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9307 {
9308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9309         struct net_device *dev = info->user_ptr[1];
9310
9311         return cfg80211_leave_mesh(rdev, dev);
9312 }
9313
9314 #ifdef CONFIG_PM
9315 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9316                                         struct cfg80211_registered_device *rdev)
9317 {
9318         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9319         struct nlattr *nl_pats, *nl_pat;
9320         int i, pat_len;
9321
9322         if (!wowlan->n_patterns)
9323                 return 0;
9324
9325         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9326         if (!nl_pats)
9327                 return -ENOBUFS;
9328
9329         for (i = 0; i < wowlan->n_patterns; i++) {
9330                 nl_pat = nla_nest_start(msg, i + 1);
9331                 if (!nl_pat)
9332                         return -ENOBUFS;
9333                 pat_len = wowlan->patterns[i].pattern_len;
9334                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9335                             wowlan->patterns[i].mask) ||
9336                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9337                             wowlan->patterns[i].pattern) ||
9338                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9339                                 wowlan->patterns[i].pkt_offset))
9340                         return -ENOBUFS;
9341                 nla_nest_end(msg, nl_pat);
9342         }
9343         nla_nest_end(msg, nl_pats);
9344
9345         return 0;
9346 }
9347
9348 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9349                                    struct cfg80211_wowlan_tcp *tcp)
9350 {
9351         struct nlattr *nl_tcp;
9352
9353         if (!tcp)
9354                 return 0;
9355
9356         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9357         if (!nl_tcp)
9358                 return -ENOBUFS;
9359
9360         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9361             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9362             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9363             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9364             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9365             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9366                     tcp->payload_len, tcp->payload) ||
9367             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9368                         tcp->data_interval) ||
9369             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9370                     tcp->wake_len, tcp->wake_data) ||
9371             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9372                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9373                 return -ENOBUFS;
9374
9375         if (tcp->payload_seq.len &&
9376             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9377                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9378                 return -ENOBUFS;
9379
9380         if (tcp->payload_tok.len &&
9381             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9382                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9383                     &tcp->payload_tok))
9384                 return -ENOBUFS;
9385
9386         nla_nest_end(msg, nl_tcp);
9387
9388         return 0;
9389 }
9390
9391 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9392                                   struct cfg80211_sched_scan_request *req)
9393 {
9394         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9395         int i;
9396
9397         if (!req)
9398                 return 0;
9399
9400         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9401         if (!nd)
9402                 return -ENOBUFS;
9403
9404         if (req->n_scan_plans == 1 &&
9405             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9406                         req->scan_plans[0].interval * 1000))
9407                 return -ENOBUFS;
9408
9409         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9410                 return -ENOBUFS;
9411
9412         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9413         if (!freqs)
9414                 return -ENOBUFS;
9415
9416         for (i = 0; i < req->n_channels; i++)
9417                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9418
9419         nla_nest_end(msg, freqs);
9420
9421         if (req->n_match_sets) {
9422                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9423                 for (i = 0; i < req->n_match_sets; i++) {
9424                         match = nla_nest_start(msg, i);
9425                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9426                                 req->match_sets[i].ssid.ssid_len,
9427                                 req->match_sets[i].ssid.ssid);
9428                         nla_nest_end(msg, match);
9429                 }
9430                 nla_nest_end(msg, matches);
9431         }
9432
9433         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9434         if (!scan_plans)
9435                 return -ENOBUFS;
9436
9437         for (i = 0; i < req->n_scan_plans; i++) {
9438                 scan_plan = nla_nest_start(msg, i + 1);
9439                 if (!scan_plan ||
9440                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9441                                 req->scan_plans[i].interval) ||
9442                     (req->scan_plans[i].iterations &&
9443                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9444                                  req->scan_plans[i].iterations)))
9445                         return -ENOBUFS;
9446                 nla_nest_end(msg, scan_plan);
9447         }
9448         nla_nest_end(msg, scan_plans);
9449
9450         nla_nest_end(msg, nd);
9451
9452         return 0;
9453 }
9454
9455 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9456 {
9457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9458         struct sk_buff *msg;
9459         void *hdr;
9460         u32 size = NLMSG_DEFAULT_SIZE;
9461
9462         if (!rdev->wiphy.wowlan)
9463                 return -EOPNOTSUPP;
9464
9465         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9466                 /* adjust size to have room for all the data */
9467                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9468                         rdev->wiphy.wowlan_config->tcp->payload_len +
9469                         rdev->wiphy.wowlan_config->tcp->wake_len +
9470                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9471         }
9472
9473         msg = nlmsg_new(size, GFP_KERNEL);
9474         if (!msg)
9475                 return -ENOMEM;
9476
9477         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9478                              NL80211_CMD_GET_WOWLAN);
9479         if (!hdr)
9480                 goto nla_put_failure;
9481
9482         if (rdev->wiphy.wowlan_config) {
9483                 struct nlattr *nl_wowlan;
9484
9485                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9486                 if (!nl_wowlan)
9487                         goto nla_put_failure;
9488
9489                 if ((rdev->wiphy.wowlan_config->any &&
9490                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9491                     (rdev->wiphy.wowlan_config->disconnect &&
9492                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9493                     (rdev->wiphy.wowlan_config->magic_pkt &&
9494                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9495                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9496                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9497                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9498                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9499                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9500                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9501                     (rdev->wiphy.wowlan_config->rfkill_release &&
9502                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9503                         goto nla_put_failure;
9504
9505                 if (nl80211_send_wowlan_patterns(msg, rdev))
9506                         goto nla_put_failure;
9507
9508                 if (nl80211_send_wowlan_tcp(msg,
9509                                             rdev->wiphy.wowlan_config->tcp))
9510                         goto nla_put_failure;
9511
9512                 if (nl80211_send_wowlan_nd(
9513                             msg,
9514                             rdev->wiphy.wowlan_config->nd_config))
9515                         goto nla_put_failure;
9516
9517                 nla_nest_end(msg, nl_wowlan);
9518         }
9519
9520         genlmsg_end(msg, hdr);
9521         return genlmsg_reply(msg, info);
9522
9523 nla_put_failure:
9524         nlmsg_free(msg);
9525         return -ENOBUFS;
9526 }
9527
9528 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9529                                     struct nlattr *attr,
9530                                     struct cfg80211_wowlan *trig)
9531 {
9532         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9533         struct cfg80211_wowlan_tcp *cfg;
9534         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9535         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9536         u32 size;
9537         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9538         int err, port;
9539
9540         if (!rdev->wiphy.wowlan->tcp)
9541                 return -EINVAL;
9542
9543         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9544                         nla_data(attr), nla_len(attr),
9545                         nl80211_wowlan_tcp_policy);
9546         if (err)
9547                 return err;
9548
9549         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9550             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9551             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9552             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9553             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9554             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9555             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9556             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9557                 return -EINVAL;
9558
9559         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9560         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9561                 return -EINVAL;
9562
9563         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9564                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9565             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9566                 return -EINVAL;
9567
9568         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9569         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9570                 return -EINVAL;
9571
9572         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9573         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9574                 return -EINVAL;
9575
9576         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9577                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9578
9579                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9580                 tokens_size = tokln - sizeof(*tok);
9581
9582                 if (!tok->len || tokens_size % tok->len)
9583                         return -EINVAL;
9584                 if (!rdev->wiphy.wowlan->tcp->tok)
9585                         return -EINVAL;
9586                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9587                         return -EINVAL;
9588                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9589                         return -EINVAL;
9590                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9591                         return -EINVAL;
9592                 if (tok->offset + tok->len > data_size)
9593                         return -EINVAL;
9594         }
9595
9596         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9597                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9598                 if (!rdev->wiphy.wowlan->tcp->seq)
9599                         return -EINVAL;
9600                 if (seq->len == 0 || seq->len > 4)
9601                         return -EINVAL;
9602                 if (seq->len + seq->offset > data_size)
9603                         return -EINVAL;
9604         }
9605
9606         size = sizeof(*cfg);
9607         size += data_size;
9608         size += wake_size + wake_mask_size;
9609         size += tokens_size;
9610
9611         cfg = kzalloc(size, GFP_KERNEL);
9612         if (!cfg)
9613                 return -ENOMEM;
9614         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9615         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9616         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9617                ETH_ALEN);
9618         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9619                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9620         else
9621                 port = 0;
9622 #ifdef CONFIG_INET
9623         /* allocate a socket and port for it and use it */
9624         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9625                             IPPROTO_TCP, &cfg->sock, 1);
9626         if (err) {
9627                 kfree(cfg);
9628                 return err;
9629         }
9630         if (inet_csk_get_port(cfg->sock->sk, port)) {
9631                 sock_release(cfg->sock);
9632                 kfree(cfg);
9633                 return -EADDRINUSE;
9634         }
9635         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9636 #else
9637         if (!port) {
9638                 kfree(cfg);
9639                 return -EINVAL;
9640         }
9641         cfg->src_port = port;
9642 #endif
9643
9644         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9645         cfg->payload_len = data_size;
9646         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9647         memcpy((void *)cfg->payload,
9648                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9649                data_size);
9650         if (seq)
9651                 cfg->payload_seq = *seq;
9652         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9653         cfg->wake_len = wake_size;
9654         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9655         memcpy((void *)cfg->wake_data,
9656                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9657                wake_size);
9658         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9659                          data_size + wake_size;
9660         memcpy((void *)cfg->wake_mask,
9661                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9662                wake_mask_size);
9663         if (tok) {
9664                 cfg->tokens_size = tokens_size;
9665                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9666         }
9667
9668         trig->tcp = cfg;
9669
9670         return 0;
9671 }
9672
9673 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9674                                    const struct wiphy_wowlan_support *wowlan,
9675                                    struct nlattr *attr,
9676                                    struct cfg80211_wowlan *trig)
9677 {
9678         struct nlattr **tb;
9679         int err;
9680
9681         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9682         if (!tb)
9683                 return -ENOMEM;
9684
9685         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9686                 err = -EOPNOTSUPP;
9687                 goto out;
9688         }
9689
9690         err = nla_parse(tb, NL80211_ATTR_MAX,
9691                         nla_data(attr), nla_len(attr),
9692                         nl80211_policy);
9693         if (err)
9694                 goto out;
9695
9696         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9697         err = PTR_ERR_OR_ZERO(trig->nd_config);
9698         if (err)
9699                 trig->nd_config = NULL;
9700
9701 out:
9702         kfree(tb);
9703         return err;
9704 }
9705
9706 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9707 {
9708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9709         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9710         struct cfg80211_wowlan new_triggers = {};
9711         struct cfg80211_wowlan *ntrig;
9712         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9713         int err, i;
9714         bool prev_enabled = rdev->wiphy.wowlan_config;
9715         bool regular = false;
9716
9717         if (!wowlan)
9718                 return -EOPNOTSUPP;
9719
9720         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9721                 cfg80211_rdev_free_wowlan(rdev);
9722                 rdev->wiphy.wowlan_config = NULL;
9723                 goto set_wakeup;
9724         }
9725
9726         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9727                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9728                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9729                         nl80211_wowlan_policy);
9730         if (err)
9731                 return err;
9732
9733         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9734                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9735                         return -EINVAL;
9736                 new_triggers.any = true;
9737         }
9738
9739         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9740                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9741                         return -EINVAL;
9742                 new_triggers.disconnect = true;
9743                 regular = true;
9744         }
9745
9746         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9747                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9748                         return -EINVAL;
9749                 new_triggers.magic_pkt = true;
9750                 regular = true;
9751         }
9752
9753         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9754                 return -EINVAL;
9755
9756         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9757                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9758                         return -EINVAL;
9759                 new_triggers.gtk_rekey_failure = true;
9760                 regular = true;
9761         }
9762
9763         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9764                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9765                         return -EINVAL;
9766                 new_triggers.eap_identity_req = true;
9767                 regular = true;
9768         }
9769
9770         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9771                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9772                         return -EINVAL;
9773                 new_triggers.four_way_handshake = true;
9774                 regular = true;
9775         }
9776
9777         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9778                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9779                         return -EINVAL;
9780                 new_triggers.rfkill_release = true;
9781                 regular = true;
9782         }
9783
9784         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9785                 struct nlattr *pat;
9786                 int n_patterns = 0;
9787                 int rem, pat_len, mask_len, pkt_offset;
9788                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9789
9790                 regular = true;
9791
9792                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9793                                     rem)
9794                         n_patterns++;
9795                 if (n_patterns > wowlan->n_patterns)
9796                         return -EINVAL;
9797
9798                 new_triggers.patterns = kcalloc(n_patterns,
9799                                                 sizeof(new_triggers.patterns[0]),
9800                                                 GFP_KERNEL);
9801                 if (!new_triggers.patterns)
9802                         return -ENOMEM;
9803
9804                 new_triggers.n_patterns = n_patterns;
9805                 i = 0;
9806
9807                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9808                                     rem) {
9809                         u8 *mask_pat;
9810
9811                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9812                                   nla_len(pat), NULL);
9813                         err = -EINVAL;
9814                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9815                             !pat_tb[NL80211_PKTPAT_PATTERN])
9816                                 goto error;
9817                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9818                         mask_len = DIV_ROUND_UP(pat_len, 8);
9819                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9820                                 goto error;
9821                         if (pat_len > wowlan->pattern_max_len ||
9822                             pat_len < wowlan->pattern_min_len)
9823                                 goto error;
9824
9825                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9826                                 pkt_offset = 0;
9827                         else
9828                                 pkt_offset = nla_get_u32(
9829                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9830                         if (pkt_offset > wowlan->max_pkt_offset)
9831                                 goto error;
9832                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9833
9834                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9835                         if (!mask_pat) {
9836                                 err = -ENOMEM;
9837                                 goto error;
9838                         }
9839                         new_triggers.patterns[i].mask = mask_pat;
9840                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9841                                mask_len);
9842                         mask_pat += mask_len;
9843                         new_triggers.patterns[i].pattern = mask_pat;
9844                         new_triggers.patterns[i].pattern_len = pat_len;
9845                         memcpy(mask_pat,
9846                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9847                                pat_len);
9848                         i++;
9849                 }
9850         }
9851
9852         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9853                 regular = true;
9854                 err = nl80211_parse_wowlan_tcp(
9855                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9856                         &new_triggers);
9857                 if (err)
9858                         goto error;
9859         }
9860
9861         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9862                 regular = true;
9863                 err = nl80211_parse_wowlan_nd(
9864                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9865                         &new_triggers);
9866                 if (err)
9867                         goto error;
9868         }
9869
9870         /* The 'any' trigger means the device continues operating more or less
9871          * as in its normal operation mode and wakes up the host on most of the
9872          * normal interrupts (like packet RX, ...)
9873          * It therefore makes little sense to combine with the more constrained
9874          * wakeup trigger modes.
9875          */
9876         if (new_triggers.any && regular) {
9877                 err = -EINVAL;
9878                 goto error;
9879         }
9880
9881         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9882         if (!ntrig) {
9883                 err = -ENOMEM;
9884                 goto error;
9885         }
9886         cfg80211_rdev_free_wowlan(rdev);
9887         rdev->wiphy.wowlan_config = ntrig;
9888
9889  set_wakeup:
9890         if (rdev->ops->set_wakeup &&
9891             prev_enabled != !!rdev->wiphy.wowlan_config)
9892                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9893
9894         return 0;
9895  error:
9896         for (i = 0; i < new_triggers.n_patterns; i++)
9897                 kfree(new_triggers.patterns[i].mask);
9898         kfree(new_triggers.patterns);
9899         if (new_triggers.tcp && new_triggers.tcp->sock)
9900                 sock_release(new_triggers.tcp->sock);
9901         kfree(new_triggers.tcp);
9902         kfree(new_triggers.nd_config);
9903         return err;
9904 }
9905 #endif
9906
9907 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9908                                        struct cfg80211_registered_device *rdev)
9909 {
9910         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9911         int i, j, pat_len;
9912         struct cfg80211_coalesce_rules *rule;
9913
9914         if (!rdev->coalesce->n_rules)
9915                 return 0;
9916
9917         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9918         if (!nl_rules)
9919                 return -ENOBUFS;
9920
9921         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9922                 nl_rule = nla_nest_start(msg, i + 1);
9923                 if (!nl_rule)
9924                         return -ENOBUFS;
9925
9926                 rule = &rdev->coalesce->rules[i];
9927                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9928                                 rule->delay))
9929                         return -ENOBUFS;
9930
9931                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9932                                 rule->condition))
9933                         return -ENOBUFS;
9934
9935                 nl_pats = nla_nest_start(msg,
9936                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9937                 if (!nl_pats)
9938                         return -ENOBUFS;
9939
9940                 for (j = 0; j < rule->n_patterns; j++) {
9941                         nl_pat = nla_nest_start(msg, j + 1);
9942                         if (!nl_pat)
9943                                 return -ENOBUFS;
9944                         pat_len = rule->patterns[j].pattern_len;
9945                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9946                                     DIV_ROUND_UP(pat_len, 8),
9947                                     rule->patterns[j].mask) ||
9948                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9949                                     rule->patterns[j].pattern) ||
9950                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9951                                         rule->patterns[j].pkt_offset))
9952                                 return -ENOBUFS;
9953                         nla_nest_end(msg, nl_pat);
9954                 }
9955                 nla_nest_end(msg, nl_pats);
9956                 nla_nest_end(msg, nl_rule);
9957         }
9958         nla_nest_end(msg, nl_rules);
9959
9960         return 0;
9961 }
9962
9963 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9964 {
9965         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9966         struct sk_buff *msg;
9967         void *hdr;
9968
9969         if (!rdev->wiphy.coalesce)
9970                 return -EOPNOTSUPP;
9971
9972         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9973         if (!msg)
9974                 return -ENOMEM;
9975
9976         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9977                              NL80211_CMD_GET_COALESCE);
9978         if (!hdr)
9979                 goto nla_put_failure;
9980
9981         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9982                 goto nla_put_failure;
9983
9984         genlmsg_end(msg, hdr);
9985         return genlmsg_reply(msg, info);
9986
9987 nla_put_failure:
9988         nlmsg_free(msg);
9989         return -ENOBUFS;
9990 }
9991
9992 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9993 {
9994         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9995         int i, j;
9996         struct cfg80211_coalesce_rules *rule;
9997
9998         if (!coalesce)
9999                 return;
10000
10001         for (i = 0; i < coalesce->n_rules; i++) {
10002                 rule = &coalesce->rules[i];
10003                 for (j = 0; j < rule->n_patterns; j++)
10004                         kfree(rule->patterns[j].mask);
10005                 kfree(rule->patterns);
10006         }
10007         kfree(coalesce->rules);
10008         kfree(coalesce);
10009         rdev->coalesce = NULL;
10010 }
10011
10012 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10013                                        struct nlattr *rule,
10014                                        struct cfg80211_coalesce_rules *new_rule)
10015 {
10016         int err, i;
10017         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10018         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10019         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10020         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10021
10022         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
10023                         nla_len(rule), nl80211_coalesce_policy);
10024         if (err)
10025                 return err;
10026
10027         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10028                 new_rule->delay =
10029                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10030         if (new_rule->delay > coalesce->max_delay)
10031                 return -EINVAL;
10032
10033         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10034                 new_rule->condition =
10035                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10036         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10037             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10038                 return -EINVAL;
10039
10040         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10041                 return -EINVAL;
10042
10043         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10044                             rem)
10045                 n_patterns++;
10046         if (n_patterns > coalesce->n_patterns)
10047                 return -EINVAL;
10048
10049         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10050                                      GFP_KERNEL);
10051         if (!new_rule->patterns)
10052                 return -ENOMEM;
10053
10054         new_rule->n_patterns = n_patterns;
10055         i = 0;
10056
10057         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10058                             rem) {
10059                 u8 *mask_pat;
10060
10061                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10062                           nla_len(pat), NULL);
10063                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10064                     !pat_tb[NL80211_PKTPAT_PATTERN])
10065                         return -EINVAL;
10066                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10067                 mask_len = DIV_ROUND_UP(pat_len, 8);
10068                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10069                         return -EINVAL;
10070                 if (pat_len > coalesce->pattern_max_len ||
10071                     pat_len < coalesce->pattern_min_len)
10072                         return -EINVAL;
10073
10074                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10075                         pkt_offset = 0;
10076                 else
10077                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10078                 if (pkt_offset > coalesce->max_pkt_offset)
10079                         return -EINVAL;
10080                 new_rule->patterns[i].pkt_offset = pkt_offset;
10081
10082                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10083                 if (!mask_pat)
10084                         return -ENOMEM;
10085
10086                 new_rule->patterns[i].mask = mask_pat;
10087                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10088                        mask_len);
10089
10090                 mask_pat += mask_len;
10091                 new_rule->patterns[i].pattern = mask_pat;
10092                 new_rule->patterns[i].pattern_len = pat_len;
10093                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10094                        pat_len);
10095                 i++;
10096         }
10097
10098         return 0;
10099 }
10100
10101 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10102 {
10103         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10104         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10105         struct cfg80211_coalesce new_coalesce = {};
10106         struct cfg80211_coalesce *n_coalesce;
10107         int err, rem_rule, n_rules = 0, i, j;
10108         struct nlattr *rule;
10109         struct cfg80211_coalesce_rules *tmp_rule;
10110
10111         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10112                 return -EOPNOTSUPP;
10113
10114         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10115                 cfg80211_rdev_free_coalesce(rdev);
10116                 rdev_set_coalesce(rdev, NULL);
10117                 return 0;
10118         }
10119
10120         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10121                             rem_rule)
10122                 n_rules++;
10123         if (n_rules > coalesce->n_rules)
10124                 return -EINVAL;
10125
10126         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10127                                      GFP_KERNEL);
10128         if (!new_coalesce.rules)
10129                 return -ENOMEM;
10130
10131         new_coalesce.n_rules = n_rules;
10132         i = 0;
10133
10134         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10135                             rem_rule) {
10136                 err = nl80211_parse_coalesce_rule(rdev, rule,
10137                                                   &new_coalesce.rules[i]);
10138                 if (err)
10139                         goto error;
10140
10141                 i++;
10142         }
10143
10144         err = rdev_set_coalesce(rdev, &new_coalesce);
10145         if (err)
10146                 goto error;
10147
10148         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10149         if (!n_coalesce) {
10150                 err = -ENOMEM;
10151                 goto error;
10152         }
10153         cfg80211_rdev_free_coalesce(rdev);
10154         rdev->coalesce = n_coalesce;
10155
10156         return 0;
10157 error:
10158         for (i = 0; i < new_coalesce.n_rules; i++) {
10159                 tmp_rule = &new_coalesce.rules[i];
10160                 for (j = 0; j < tmp_rule->n_patterns; j++)
10161                         kfree(tmp_rule->patterns[j].mask);
10162                 kfree(tmp_rule->patterns);
10163         }
10164         kfree(new_coalesce.rules);
10165
10166         return err;
10167 }
10168
10169 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10170 {
10171         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10172         struct net_device *dev = info->user_ptr[1];
10173         struct wireless_dev *wdev = dev->ieee80211_ptr;
10174         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10175         struct cfg80211_gtk_rekey_data rekey_data;
10176         int err;
10177
10178         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10179                 return -EINVAL;
10180
10181         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10182                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10183                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10184                         nl80211_rekey_policy);
10185         if (err)
10186                 return err;
10187
10188         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10189                 return -ERANGE;
10190         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10191                 return -ERANGE;
10192         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10193                 return -ERANGE;
10194
10195         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10196         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10197         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10198
10199         wdev_lock(wdev);
10200         if (!wdev->current_bss) {
10201                 err = -ENOTCONN;
10202                 goto out;
10203         }
10204
10205         if (!rdev->ops->set_rekey_data) {
10206                 err = -EOPNOTSUPP;
10207                 goto out;
10208         }
10209
10210         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10211  out:
10212         wdev_unlock(wdev);
10213         return err;
10214 }
10215
10216 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10217                                              struct genl_info *info)
10218 {
10219         struct net_device *dev = info->user_ptr[1];
10220         struct wireless_dev *wdev = dev->ieee80211_ptr;
10221
10222         if (wdev->iftype != NL80211_IFTYPE_AP &&
10223             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10224                 return -EINVAL;
10225
10226         if (wdev->ap_unexpected_nlportid)
10227                 return -EBUSY;
10228
10229         wdev->ap_unexpected_nlportid = info->snd_portid;
10230         return 0;
10231 }
10232
10233 static int nl80211_probe_client(struct sk_buff *skb,
10234                                 struct genl_info *info)
10235 {
10236         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10237         struct net_device *dev = info->user_ptr[1];
10238         struct wireless_dev *wdev = dev->ieee80211_ptr;
10239         struct sk_buff *msg;
10240         void *hdr;
10241         const u8 *addr;
10242         u64 cookie;
10243         int err;
10244
10245         if (wdev->iftype != NL80211_IFTYPE_AP &&
10246             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10247                 return -EOPNOTSUPP;
10248
10249         if (!info->attrs[NL80211_ATTR_MAC])
10250                 return -EINVAL;
10251
10252         if (!rdev->ops->probe_client)
10253                 return -EOPNOTSUPP;
10254
10255         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10256         if (!msg)
10257                 return -ENOMEM;
10258
10259         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10260                              NL80211_CMD_PROBE_CLIENT);
10261         if (!hdr) {
10262                 err = -ENOBUFS;
10263                 goto free_msg;
10264         }
10265
10266         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10267
10268         err = rdev_probe_client(rdev, dev, addr, &cookie);
10269         if (err)
10270                 goto free_msg;
10271
10272         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10273                               NL80211_ATTR_PAD))
10274                 goto nla_put_failure;
10275
10276         genlmsg_end(msg, hdr);
10277
10278         return genlmsg_reply(msg, info);
10279
10280  nla_put_failure:
10281         err = -ENOBUFS;
10282  free_msg:
10283         nlmsg_free(msg);
10284         return err;
10285 }
10286
10287 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10288 {
10289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10290         struct cfg80211_beacon_registration *reg, *nreg;
10291         int rv;
10292
10293         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10294                 return -EOPNOTSUPP;
10295
10296         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10297         if (!nreg)
10298                 return -ENOMEM;
10299
10300         /* First, check if already registered. */
10301         spin_lock_bh(&rdev->beacon_registrations_lock);
10302         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10303                 if (reg->nlportid == info->snd_portid) {
10304                         rv = -EALREADY;
10305                         goto out_err;
10306                 }
10307         }
10308         /* Add it to the list */
10309         nreg->nlportid = info->snd_portid;
10310         list_add(&nreg->list, &rdev->beacon_registrations);
10311
10312         spin_unlock_bh(&rdev->beacon_registrations_lock);
10313
10314         return 0;
10315 out_err:
10316         spin_unlock_bh(&rdev->beacon_registrations_lock);
10317         kfree(nreg);
10318         return rv;
10319 }
10320
10321 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10322 {
10323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10324         struct wireless_dev *wdev = info->user_ptr[1];
10325         int err;
10326
10327         if (!rdev->ops->start_p2p_device)
10328                 return -EOPNOTSUPP;
10329
10330         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10331                 return -EOPNOTSUPP;
10332
10333         if (wdev->p2p_started)
10334                 return 0;
10335
10336         if (rfkill_blocked(rdev->rfkill))
10337                 return -ERFKILL;
10338
10339         err = rdev_start_p2p_device(rdev, wdev);
10340         if (err)
10341                 return err;
10342
10343         wdev->p2p_started = true;
10344         rdev->opencount++;
10345
10346         return 0;
10347 }
10348
10349 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10350 {
10351         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10352         struct wireless_dev *wdev = info->user_ptr[1];
10353
10354         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10355                 return -EOPNOTSUPP;
10356
10357         if (!rdev->ops->stop_p2p_device)
10358                 return -EOPNOTSUPP;
10359
10360         cfg80211_stop_p2p_device(rdev, wdev);
10361
10362         return 0;
10363 }
10364
10365 static int nl80211_get_protocol_features(struct sk_buff *skb,
10366                                          struct genl_info *info)
10367 {
10368         void *hdr;
10369         struct sk_buff *msg;
10370
10371         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10372         if (!msg)
10373                 return -ENOMEM;
10374
10375         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10376                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10377         if (!hdr)
10378                 goto nla_put_failure;
10379
10380         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10381                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10382                 goto nla_put_failure;
10383
10384         genlmsg_end(msg, hdr);
10385         return genlmsg_reply(msg, info);
10386
10387  nla_put_failure:
10388         kfree_skb(msg);
10389         return -ENOBUFS;
10390 }
10391
10392 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10393 {
10394         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10395         struct cfg80211_update_ft_ies_params ft_params;
10396         struct net_device *dev = info->user_ptr[1];
10397
10398         if (!rdev->ops->update_ft_ies)
10399                 return -EOPNOTSUPP;
10400
10401         if (!info->attrs[NL80211_ATTR_MDID] ||
10402             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10403                 return -EINVAL;
10404
10405         memset(&ft_params, 0, sizeof(ft_params));
10406         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10407         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10408         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10409
10410         return rdev_update_ft_ies(rdev, dev, &ft_params);
10411 }
10412
10413 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10414                                        struct genl_info *info)
10415 {
10416         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10417         struct wireless_dev *wdev = info->user_ptr[1];
10418         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10419         u16 duration;
10420         int ret;
10421
10422         if (!rdev->ops->crit_proto_start)
10423                 return -EOPNOTSUPP;
10424
10425         if (WARN_ON(!rdev->ops->crit_proto_stop))
10426                 return -EINVAL;
10427
10428         if (rdev->crit_proto_nlportid)
10429                 return -EBUSY;
10430
10431         /* determine protocol if provided */
10432         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10433                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10434
10435         if (proto >= NUM_NL80211_CRIT_PROTO)
10436                 return -EINVAL;
10437
10438         /* timeout must be provided */
10439         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10440                 return -EINVAL;
10441
10442         duration =
10443                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10444
10445         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10446                 return -ERANGE;
10447
10448         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10449         if (!ret)
10450                 rdev->crit_proto_nlportid = info->snd_portid;
10451
10452         return ret;
10453 }
10454
10455 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10456                                       struct genl_info *info)
10457 {
10458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10459         struct wireless_dev *wdev = info->user_ptr[1];
10460
10461         if (!rdev->ops->crit_proto_stop)
10462                 return -EOPNOTSUPP;
10463
10464         if (rdev->crit_proto_nlportid) {
10465                 rdev->crit_proto_nlportid = 0;
10466                 rdev_crit_proto_stop(rdev, wdev);
10467         }
10468         return 0;
10469 }
10470
10471 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10472 {
10473         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10474         struct wireless_dev *wdev =
10475                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10476         int i, err;
10477         u32 vid, subcmd;
10478
10479         if (!rdev->wiphy.vendor_commands)
10480                 return -EOPNOTSUPP;
10481
10482         if (IS_ERR(wdev)) {
10483                 err = PTR_ERR(wdev);
10484                 if (err != -EINVAL)
10485                         return err;
10486                 wdev = NULL;
10487         } else if (wdev->wiphy != &rdev->wiphy) {
10488                 return -EINVAL;
10489         }
10490
10491         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10492             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10493                 return -EINVAL;
10494
10495         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10496         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10497         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10498                 const struct wiphy_vendor_command *vcmd;
10499                 void *data = NULL;
10500                 int len = 0;
10501
10502                 vcmd = &rdev->wiphy.vendor_commands[i];
10503
10504                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10505                         continue;
10506
10507                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10508                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10509                         if (!wdev)
10510                                 return -EINVAL;
10511                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10512                             !wdev->netdev)
10513                                 return -EINVAL;
10514
10515                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10516                                 if (wdev->netdev &&
10517                                     !netif_running(wdev->netdev))
10518                                         return -ENETDOWN;
10519                                 if (!wdev->netdev && !wdev->p2p_started)
10520                                         return -ENETDOWN;
10521                         }
10522
10523                         if (!vcmd->doit)
10524                                 return -EOPNOTSUPP;
10525                 } else {
10526                         wdev = NULL;
10527                 }
10528
10529                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10530                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10531                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10532                 }
10533
10534                 rdev->cur_cmd_info = info;
10535                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10536                                                           data, len);
10537                 rdev->cur_cmd_info = NULL;
10538                 return err;
10539         }
10540
10541         return -EOPNOTSUPP;
10542 }
10543
10544 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10545                                        struct netlink_callback *cb,
10546                                        struct cfg80211_registered_device **rdev,
10547                                        struct wireless_dev **wdev)
10548 {
10549         u32 vid, subcmd;
10550         unsigned int i;
10551         int vcmd_idx = -1;
10552         int err;
10553         void *data = NULL;
10554         unsigned int data_len = 0;
10555
10556         rtnl_lock();
10557
10558         if (cb->args[0]) {
10559                 /* subtract the 1 again here */
10560                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10561                 struct wireless_dev *tmp;
10562
10563                 if (!wiphy) {
10564                         err = -ENODEV;
10565                         goto out_unlock;
10566                 }
10567                 *rdev = wiphy_to_rdev(wiphy);
10568                 *wdev = NULL;
10569
10570                 if (cb->args[1]) {
10571                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10572                                 if (tmp->identifier == cb->args[1] - 1) {
10573                                         *wdev = tmp;
10574                                         break;
10575                                 }
10576                         }
10577                 }
10578
10579                 /* keep rtnl locked in successful case */
10580                 return 0;
10581         }
10582
10583         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10584                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10585                           nl80211_policy);
10586         if (err)
10587                 goto out_unlock;
10588
10589         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10590             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10591                 err = -EINVAL;
10592                 goto out_unlock;
10593         }
10594
10595         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10596                                            nl80211_fam.attrbuf);
10597         if (IS_ERR(*wdev))
10598                 *wdev = NULL;
10599
10600         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10601                                            nl80211_fam.attrbuf);
10602         if (IS_ERR(*rdev)) {
10603                 err = PTR_ERR(*rdev);
10604                 goto out_unlock;
10605         }
10606
10607         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10608         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10609
10610         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10611                 const struct wiphy_vendor_command *vcmd;
10612
10613                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10614
10615                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10616                         continue;
10617
10618                 if (!vcmd->dumpit) {
10619                         err = -EOPNOTSUPP;
10620                         goto out_unlock;
10621                 }
10622
10623                 vcmd_idx = i;
10624                 break;
10625         }
10626
10627         if (vcmd_idx < 0) {
10628                 err = -EOPNOTSUPP;
10629                 goto out_unlock;
10630         }
10631
10632         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10633                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10634                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10635         }
10636
10637         /* 0 is the first index - add 1 to parse only once */
10638         cb->args[0] = (*rdev)->wiphy_idx + 1;
10639         /* add 1 to know if it was NULL */
10640         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10641         cb->args[2] = vcmd_idx;
10642         cb->args[3] = (unsigned long)data;
10643         cb->args[4] = data_len;
10644
10645         /* keep rtnl locked in successful case */
10646         return 0;
10647  out_unlock:
10648         rtnl_unlock();
10649         return err;
10650 }
10651
10652 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10653                                    struct netlink_callback *cb)
10654 {
10655         struct cfg80211_registered_device *rdev;
10656         struct wireless_dev *wdev;
10657         unsigned int vcmd_idx;
10658         const struct wiphy_vendor_command *vcmd;
10659         void *data;
10660         int data_len;
10661         int err;
10662         struct nlattr *vendor_data;
10663
10664         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10665         if (err)
10666                 return err;
10667
10668         vcmd_idx = cb->args[2];
10669         data = (void *)cb->args[3];
10670         data_len = cb->args[4];
10671         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10672
10673         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10674                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10675                 if (!wdev)
10676                         return -EINVAL;
10677                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10678                     !wdev->netdev)
10679                         return -EINVAL;
10680
10681                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10682                         if (wdev->netdev &&
10683                             !netif_running(wdev->netdev))
10684                                 return -ENETDOWN;
10685                         if (!wdev->netdev && !wdev->p2p_started)
10686                                 return -ENETDOWN;
10687                 }
10688         }
10689
10690         while (1) {
10691                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10692                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10693                                            NL80211_CMD_VENDOR);
10694                 if (!hdr)
10695                         break;
10696
10697                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10698                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10699                                                wdev_id(wdev),
10700                                                NL80211_ATTR_PAD))) {
10701                         genlmsg_cancel(skb, hdr);
10702                         break;
10703                 }
10704
10705                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10706                 if (!vendor_data) {
10707                         genlmsg_cancel(skb, hdr);
10708                         break;
10709                 }
10710
10711                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10712                                    (unsigned long *)&cb->args[5]);
10713                 nla_nest_end(skb, vendor_data);
10714
10715                 if (err == -ENOBUFS || err == -ENOENT) {
10716                         genlmsg_cancel(skb, hdr);
10717                         break;
10718                 } else if (err) {
10719                         genlmsg_cancel(skb, hdr);
10720                         goto out;
10721                 }
10722
10723                 genlmsg_end(skb, hdr);
10724         }
10725
10726         err = skb->len;
10727  out:
10728         rtnl_unlock();
10729         return err;
10730 }
10731
10732 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10733                                            enum nl80211_commands cmd,
10734                                            enum nl80211_attrs attr,
10735                                            int approxlen)
10736 {
10737         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10738
10739         if (WARN_ON(!rdev->cur_cmd_info))
10740                 return NULL;
10741
10742         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10743                                            rdev->cur_cmd_info->snd_portid,
10744                                            rdev->cur_cmd_info->snd_seq,
10745                                            cmd, attr, NULL, GFP_KERNEL);
10746 }
10747 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10748
10749 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10750 {
10751         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10752         void *hdr = ((void **)skb->cb)[1];
10753         struct nlattr *data = ((void **)skb->cb)[2];
10754
10755         /* clear CB data for netlink core to own from now on */
10756         memset(skb->cb, 0, sizeof(skb->cb));
10757
10758         if (WARN_ON(!rdev->cur_cmd_info)) {
10759                 kfree_skb(skb);
10760                 return -EINVAL;
10761         }
10762
10763         nla_nest_end(skb, data);
10764         genlmsg_end(skb, hdr);
10765         return genlmsg_reply(skb, rdev->cur_cmd_info);
10766 }
10767 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10768
10769 static int nl80211_set_qos_map(struct sk_buff *skb,
10770                                struct genl_info *info)
10771 {
10772         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10773         struct cfg80211_qos_map *qos_map = NULL;
10774         struct net_device *dev = info->user_ptr[1];
10775         u8 *pos, len, num_des, des_len, des;
10776         int ret;
10777
10778         if (!rdev->ops->set_qos_map)
10779                 return -EOPNOTSUPP;
10780
10781         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10782                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10783                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10784
10785                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10786                     len > IEEE80211_QOS_MAP_LEN_MAX)
10787                         return -EINVAL;
10788
10789                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10790                 if (!qos_map)
10791                         return -ENOMEM;
10792
10793                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10794                 if (num_des) {
10795                         des_len = num_des *
10796                                 sizeof(struct cfg80211_dscp_exception);
10797                         memcpy(qos_map->dscp_exception, pos, des_len);
10798                         qos_map->num_des = num_des;
10799                         for (des = 0; des < num_des; des++) {
10800                                 if (qos_map->dscp_exception[des].up > 7) {
10801                                         kfree(qos_map);
10802                                         return -EINVAL;
10803                                 }
10804                         }
10805                         pos += des_len;
10806                 }
10807                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10808         }
10809
10810         wdev_lock(dev->ieee80211_ptr);
10811         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10812         if (!ret)
10813                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10814         wdev_unlock(dev->ieee80211_ptr);
10815
10816         kfree(qos_map);
10817         return ret;
10818 }
10819
10820 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10821 {
10822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10823         struct net_device *dev = info->user_ptr[1];
10824         struct wireless_dev *wdev = dev->ieee80211_ptr;
10825         const u8 *peer;
10826         u8 tsid, up;
10827         u16 admitted_time = 0;
10828         int err;
10829
10830         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10831                 return -EOPNOTSUPP;
10832
10833         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10834             !info->attrs[NL80211_ATTR_USER_PRIO])
10835                 return -EINVAL;
10836
10837         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10838         if (tsid >= IEEE80211_NUM_TIDS)
10839                 return -EINVAL;
10840
10841         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10842         if (up >= IEEE80211_NUM_UPS)
10843                 return -EINVAL;
10844
10845         /* WMM uses TIDs 0-7 even for TSPEC */
10846         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10847                 /* TODO: handle 802.11 TSPEC/admission control
10848                  * need more attributes for that (e.g. BA session requirement);
10849                  * change the WMM adminssion test above to allow both then
10850                  */
10851                 return -EINVAL;
10852         }
10853
10854         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10855
10856         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10857                 admitted_time =
10858                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10859                 if (!admitted_time)
10860                         return -EINVAL;
10861         }
10862
10863         wdev_lock(wdev);
10864         switch (wdev->iftype) {
10865         case NL80211_IFTYPE_STATION:
10866         case NL80211_IFTYPE_P2P_CLIENT:
10867                 if (wdev->current_bss)
10868                         break;
10869                 err = -ENOTCONN;
10870                 goto out;
10871         default:
10872                 err = -EOPNOTSUPP;
10873                 goto out;
10874         }
10875
10876         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10877
10878  out:
10879         wdev_unlock(wdev);
10880         return err;
10881 }
10882
10883 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10884 {
10885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10886         struct net_device *dev = info->user_ptr[1];
10887         struct wireless_dev *wdev = dev->ieee80211_ptr;
10888         const u8 *peer;
10889         u8 tsid;
10890         int err;
10891
10892         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10893                 return -EINVAL;
10894
10895         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10896         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10897
10898         wdev_lock(wdev);
10899         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10900         wdev_unlock(wdev);
10901
10902         return err;
10903 }
10904
10905 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10906                                        struct genl_info *info)
10907 {
10908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10909         struct net_device *dev = info->user_ptr[1];
10910         struct wireless_dev *wdev = dev->ieee80211_ptr;
10911         struct cfg80211_chan_def chandef = {};
10912         const u8 *addr;
10913         u8 oper_class;
10914         int err;
10915
10916         if (!rdev->ops->tdls_channel_switch ||
10917             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10918                 return -EOPNOTSUPP;
10919
10920         switch (dev->ieee80211_ptr->iftype) {
10921         case NL80211_IFTYPE_STATION:
10922         case NL80211_IFTYPE_P2P_CLIENT:
10923                 break;
10924         default:
10925                 return -EOPNOTSUPP;
10926         }
10927
10928         if (!info->attrs[NL80211_ATTR_MAC] ||
10929             !info->attrs[NL80211_ATTR_OPER_CLASS])
10930                 return -EINVAL;
10931
10932         err = nl80211_parse_chandef(rdev, info, &chandef);
10933         if (err)
10934                 return err;
10935
10936         /*
10937          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10938          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10939          * specification is not defined for them.
10940          */
10941         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10942             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10943             chandef.width != NL80211_CHAN_WIDTH_20)
10944                 return -EINVAL;
10945
10946         /* we will be active on the TDLS link */
10947         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10948                                            wdev->iftype))
10949                 return -EINVAL;
10950
10951         /* don't allow switching to DFS channels */
10952         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10953                 return -EINVAL;
10954
10955         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10956         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10957
10958         wdev_lock(wdev);
10959         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10960         wdev_unlock(wdev);
10961
10962         return err;
10963 }
10964
10965 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10966                                               struct genl_info *info)
10967 {
10968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10969         struct net_device *dev = info->user_ptr[1];
10970         struct wireless_dev *wdev = dev->ieee80211_ptr;
10971         const u8 *addr;
10972
10973         if (!rdev->ops->tdls_channel_switch ||
10974             !rdev->ops->tdls_cancel_channel_switch ||
10975             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10976                 return -EOPNOTSUPP;
10977
10978         switch (dev->ieee80211_ptr->iftype) {
10979         case NL80211_IFTYPE_STATION:
10980         case NL80211_IFTYPE_P2P_CLIENT:
10981                 break;
10982         default:
10983                 return -EOPNOTSUPP;
10984         }
10985
10986         if (!info->attrs[NL80211_ATTR_MAC])
10987                 return -EINVAL;
10988
10989         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10990
10991         wdev_lock(wdev);
10992         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10993         wdev_unlock(wdev);
10994
10995         return 0;
10996 }
10997
10998 #define NL80211_FLAG_NEED_WIPHY         0x01
10999 #define NL80211_FLAG_NEED_NETDEV        0x02
11000 #define NL80211_FLAG_NEED_RTNL          0x04
11001 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
11002 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
11003                                          NL80211_FLAG_CHECK_NETDEV_UP)
11004 #define NL80211_FLAG_NEED_WDEV          0x10
11005 /* If a netdev is associated, it must be UP, P2P must be started */
11006 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
11007                                          NL80211_FLAG_CHECK_NETDEV_UP)
11008 #define NL80211_FLAG_CLEAR_SKB          0x20
11009
11010 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
11011                             struct genl_info *info)
11012 {
11013         struct cfg80211_registered_device *rdev;
11014         struct wireless_dev *wdev;
11015         struct net_device *dev;
11016         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
11017
11018         if (rtnl)
11019                 rtnl_lock();
11020
11021         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11022                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11023                 if (IS_ERR(rdev)) {
11024                         if (rtnl)
11025                                 rtnl_unlock();
11026                         return PTR_ERR(rdev);
11027                 }
11028                 info->user_ptr[0] = rdev;
11029         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11030                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11031                 ASSERT_RTNL();
11032
11033                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11034                                                   info->attrs);
11035                 if (IS_ERR(wdev)) {
11036                         if (rtnl)
11037                                 rtnl_unlock();
11038                         return PTR_ERR(wdev);
11039                 }
11040
11041                 dev = wdev->netdev;
11042                 rdev = wiphy_to_rdev(wdev->wiphy);
11043
11044                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11045                         if (!dev) {
11046                                 if (rtnl)
11047                                         rtnl_unlock();
11048                                 return -EINVAL;
11049                         }
11050
11051                         info->user_ptr[1] = dev;
11052                 } else {
11053                         info->user_ptr[1] = wdev;
11054                 }
11055
11056                 if (dev) {
11057                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11058                             !netif_running(dev)) {
11059                                 if (rtnl)
11060                                         rtnl_unlock();
11061                                 return -ENETDOWN;
11062                         }
11063
11064                         dev_hold(dev);
11065                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11066                         if (!wdev->p2p_started) {
11067                                 if (rtnl)
11068                                         rtnl_unlock();
11069                                 return -ENETDOWN;
11070                         }
11071                 }
11072
11073                 info->user_ptr[0] = rdev;
11074         }
11075
11076         return 0;
11077 }
11078
11079 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11080                               struct genl_info *info)
11081 {
11082         if (info->user_ptr[1]) {
11083                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11084                         struct wireless_dev *wdev = info->user_ptr[1];
11085
11086                         if (wdev->netdev)
11087                                 dev_put(wdev->netdev);
11088                 } else {
11089                         dev_put(info->user_ptr[1]);
11090                 }
11091         }
11092
11093         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11094                 rtnl_unlock();
11095
11096         /* If needed, clear the netlink message payload from the SKB
11097          * as it might contain key data that shouldn't stick around on
11098          * the heap after the SKB is freed. The netlink message header
11099          * is still needed for further processing, so leave it intact.
11100          */
11101         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11102                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11103
11104                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11105         }
11106 }
11107
11108 static const struct genl_ops nl80211_ops[] = {
11109         {
11110                 .cmd = NL80211_CMD_GET_WIPHY,
11111                 .doit = nl80211_get_wiphy,
11112                 .dumpit = nl80211_dump_wiphy,
11113                 .done = nl80211_dump_wiphy_done,
11114                 .policy = nl80211_policy,
11115                 /* can be retrieved by unprivileged users */
11116                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11117                                   NL80211_FLAG_NEED_RTNL,
11118         },
11119         {
11120                 .cmd = NL80211_CMD_SET_WIPHY,
11121                 .doit = nl80211_set_wiphy,
11122                 .policy = nl80211_policy,
11123                 .flags = GENL_UNS_ADMIN_PERM,
11124                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11125         },
11126         {
11127                 .cmd = NL80211_CMD_GET_INTERFACE,
11128                 .doit = nl80211_get_interface,
11129                 .dumpit = nl80211_dump_interface,
11130                 .policy = nl80211_policy,
11131                 /* can be retrieved by unprivileged users */
11132                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11133                                   NL80211_FLAG_NEED_RTNL,
11134         },
11135         {
11136                 .cmd = NL80211_CMD_SET_INTERFACE,
11137                 .doit = nl80211_set_interface,
11138                 .policy = nl80211_policy,
11139                 .flags = GENL_UNS_ADMIN_PERM,
11140                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11141                                   NL80211_FLAG_NEED_RTNL,
11142         },
11143         {
11144                 .cmd = NL80211_CMD_NEW_INTERFACE,
11145                 .doit = nl80211_new_interface,
11146                 .policy = nl80211_policy,
11147                 .flags = GENL_UNS_ADMIN_PERM,
11148                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11149                                   NL80211_FLAG_NEED_RTNL,
11150         },
11151         {
11152                 .cmd = NL80211_CMD_DEL_INTERFACE,
11153                 .doit = nl80211_del_interface,
11154                 .policy = nl80211_policy,
11155                 .flags = GENL_UNS_ADMIN_PERM,
11156                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11157                                   NL80211_FLAG_NEED_RTNL,
11158         },
11159         {
11160                 .cmd = NL80211_CMD_GET_KEY,
11161                 .doit = nl80211_get_key,
11162                 .policy = nl80211_policy,
11163                 .flags = GENL_UNS_ADMIN_PERM,
11164                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11165                                   NL80211_FLAG_NEED_RTNL,
11166         },
11167         {
11168                 .cmd = NL80211_CMD_SET_KEY,
11169                 .doit = nl80211_set_key,
11170                 .policy = nl80211_policy,
11171                 .flags = GENL_UNS_ADMIN_PERM,
11172                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11173                                   NL80211_FLAG_NEED_RTNL |
11174                                   NL80211_FLAG_CLEAR_SKB,
11175         },
11176         {
11177                 .cmd = NL80211_CMD_NEW_KEY,
11178                 .doit = nl80211_new_key,
11179                 .policy = nl80211_policy,
11180                 .flags = GENL_UNS_ADMIN_PERM,
11181                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11182                                   NL80211_FLAG_NEED_RTNL |
11183                                   NL80211_FLAG_CLEAR_SKB,
11184         },
11185         {
11186                 .cmd = NL80211_CMD_DEL_KEY,
11187                 .doit = nl80211_del_key,
11188                 .policy = nl80211_policy,
11189                 .flags = GENL_UNS_ADMIN_PERM,
11190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11191                                   NL80211_FLAG_NEED_RTNL,
11192         },
11193         {
11194                 .cmd = NL80211_CMD_SET_BEACON,
11195                 .policy = nl80211_policy,
11196                 .flags = GENL_UNS_ADMIN_PERM,
11197                 .doit = nl80211_set_beacon,
11198                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11199                                   NL80211_FLAG_NEED_RTNL,
11200         },
11201         {
11202                 .cmd = NL80211_CMD_START_AP,
11203                 .policy = nl80211_policy,
11204                 .flags = GENL_UNS_ADMIN_PERM,
11205                 .doit = nl80211_start_ap,
11206                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11207                                   NL80211_FLAG_NEED_RTNL,
11208         },
11209         {
11210                 .cmd = NL80211_CMD_STOP_AP,
11211                 .policy = nl80211_policy,
11212                 .flags = GENL_UNS_ADMIN_PERM,
11213                 .doit = nl80211_stop_ap,
11214                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11215                                   NL80211_FLAG_NEED_RTNL,
11216         },
11217         {
11218                 .cmd = NL80211_CMD_GET_STATION,
11219                 .doit = nl80211_get_station,
11220                 .dumpit = nl80211_dump_station,
11221                 .policy = nl80211_policy,
11222                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11223                                   NL80211_FLAG_NEED_RTNL,
11224         },
11225         {
11226                 .cmd = NL80211_CMD_SET_STATION,
11227                 .doit = nl80211_set_station,
11228                 .policy = nl80211_policy,
11229                 .flags = GENL_UNS_ADMIN_PERM,
11230                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11231                                   NL80211_FLAG_NEED_RTNL,
11232         },
11233         {
11234                 .cmd = NL80211_CMD_NEW_STATION,
11235                 .doit = nl80211_new_station,
11236                 .policy = nl80211_policy,
11237                 .flags = GENL_UNS_ADMIN_PERM,
11238                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11239                                   NL80211_FLAG_NEED_RTNL,
11240         },
11241         {
11242                 .cmd = NL80211_CMD_DEL_STATION,
11243                 .doit = nl80211_del_station,
11244                 .policy = nl80211_policy,
11245                 .flags = GENL_UNS_ADMIN_PERM,
11246                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11247                                   NL80211_FLAG_NEED_RTNL,
11248         },
11249         {
11250                 .cmd = NL80211_CMD_GET_MPATH,
11251                 .doit = nl80211_get_mpath,
11252                 .dumpit = nl80211_dump_mpath,
11253                 .policy = nl80211_policy,
11254                 .flags = GENL_UNS_ADMIN_PERM,
11255                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11256                                   NL80211_FLAG_NEED_RTNL,
11257         },
11258         {
11259                 .cmd = NL80211_CMD_GET_MPP,
11260                 .doit = nl80211_get_mpp,
11261                 .dumpit = nl80211_dump_mpp,
11262                 .policy = nl80211_policy,
11263                 .flags = GENL_UNS_ADMIN_PERM,
11264                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11265                                   NL80211_FLAG_NEED_RTNL,
11266         },
11267         {
11268                 .cmd = NL80211_CMD_SET_MPATH,
11269                 .doit = nl80211_set_mpath,
11270                 .policy = nl80211_policy,
11271                 .flags = GENL_UNS_ADMIN_PERM,
11272                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11273                                   NL80211_FLAG_NEED_RTNL,
11274         },
11275         {
11276                 .cmd = NL80211_CMD_NEW_MPATH,
11277                 .doit = nl80211_new_mpath,
11278                 .policy = nl80211_policy,
11279                 .flags = GENL_UNS_ADMIN_PERM,
11280                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11281                                   NL80211_FLAG_NEED_RTNL,
11282         },
11283         {
11284                 .cmd = NL80211_CMD_DEL_MPATH,
11285                 .doit = nl80211_del_mpath,
11286                 .policy = nl80211_policy,
11287                 .flags = GENL_UNS_ADMIN_PERM,
11288                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11289                                   NL80211_FLAG_NEED_RTNL,
11290         },
11291         {
11292                 .cmd = NL80211_CMD_SET_BSS,
11293                 .doit = nl80211_set_bss,
11294                 .policy = nl80211_policy,
11295                 .flags = GENL_UNS_ADMIN_PERM,
11296                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11297                                   NL80211_FLAG_NEED_RTNL,
11298         },
11299         {
11300                 .cmd = NL80211_CMD_GET_REG,
11301                 .doit = nl80211_get_reg_do,
11302                 .dumpit = nl80211_get_reg_dump,
11303                 .policy = nl80211_policy,
11304                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11305                 /* can be retrieved by unprivileged users */
11306         },
11307 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11308         {
11309                 .cmd = NL80211_CMD_SET_REG,
11310                 .doit = nl80211_set_reg,
11311                 .policy = nl80211_policy,
11312                 .flags = GENL_ADMIN_PERM,
11313                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11314         },
11315 #endif
11316         {
11317                 .cmd = NL80211_CMD_REQ_SET_REG,
11318                 .doit = nl80211_req_set_reg,
11319                 .policy = nl80211_policy,
11320                 .flags = GENL_ADMIN_PERM,
11321         },
11322         {
11323                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11324                 .doit = nl80211_get_mesh_config,
11325                 .policy = nl80211_policy,
11326                 /* can be retrieved by unprivileged users */
11327                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11328                                   NL80211_FLAG_NEED_RTNL,
11329         },
11330         {
11331                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11332                 .doit = nl80211_update_mesh_config,
11333                 .policy = nl80211_policy,
11334                 .flags = GENL_UNS_ADMIN_PERM,
11335                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11336                                   NL80211_FLAG_NEED_RTNL,
11337         },
11338         {
11339                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11340                 .doit = nl80211_trigger_scan,
11341                 .policy = nl80211_policy,
11342                 .flags = GENL_UNS_ADMIN_PERM,
11343                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11344                                   NL80211_FLAG_NEED_RTNL,
11345         },
11346         {
11347                 .cmd = NL80211_CMD_ABORT_SCAN,
11348                 .doit = nl80211_abort_scan,
11349                 .policy = nl80211_policy,
11350                 .flags = GENL_UNS_ADMIN_PERM,
11351                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11352                                   NL80211_FLAG_NEED_RTNL,
11353         },
11354         {
11355                 .cmd = NL80211_CMD_GET_SCAN,
11356                 .policy = nl80211_policy,
11357                 .dumpit = nl80211_dump_scan,
11358         },
11359         {
11360                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11361                 .doit = nl80211_start_sched_scan,
11362                 .policy = nl80211_policy,
11363                 .flags = GENL_UNS_ADMIN_PERM,
11364                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11365                                   NL80211_FLAG_NEED_RTNL,
11366         },
11367         {
11368                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11369                 .doit = nl80211_stop_sched_scan,
11370                 .policy = nl80211_policy,
11371                 .flags = GENL_UNS_ADMIN_PERM,
11372                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11373                                   NL80211_FLAG_NEED_RTNL,
11374         },
11375         {
11376                 .cmd = NL80211_CMD_AUTHENTICATE,
11377                 .doit = nl80211_authenticate,
11378                 .policy = nl80211_policy,
11379                 .flags = GENL_UNS_ADMIN_PERM,
11380                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11381                                   NL80211_FLAG_NEED_RTNL |
11382                                   NL80211_FLAG_CLEAR_SKB,
11383         },
11384         {
11385                 .cmd = NL80211_CMD_ASSOCIATE,
11386                 .doit = nl80211_associate,
11387                 .policy = nl80211_policy,
11388                 .flags = GENL_UNS_ADMIN_PERM,
11389                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11390                                   NL80211_FLAG_NEED_RTNL,
11391         },
11392         {
11393                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11394                 .doit = nl80211_deauthenticate,
11395                 .policy = nl80211_policy,
11396                 .flags = GENL_UNS_ADMIN_PERM,
11397                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11398                                   NL80211_FLAG_NEED_RTNL,
11399         },
11400         {
11401                 .cmd = NL80211_CMD_DISASSOCIATE,
11402                 .doit = nl80211_disassociate,
11403                 .policy = nl80211_policy,
11404                 .flags = GENL_UNS_ADMIN_PERM,
11405                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11406                                   NL80211_FLAG_NEED_RTNL,
11407         },
11408         {
11409                 .cmd = NL80211_CMD_JOIN_IBSS,
11410                 .doit = nl80211_join_ibss,
11411                 .policy = nl80211_policy,
11412                 .flags = GENL_UNS_ADMIN_PERM,
11413                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11414                                   NL80211_FLAG_NEED_RTNL,
11415         },
11416         {
11417                 .cmd = NL80211_CMD_LEAVE_IBSS,
11418                 .doit = nl80211_leave_ibss,
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 #ifdef CONFIG_NL80211_TESTMODE
11425         {
11426                 .cmd = NL80211_CMD_TESTMODE,
11427                 .doit = nl80211_testmode_do,
11428                 .dumpit = nl80211_testmode_dump,
11429                 .policy = nl80211_policy,
11430                 .flags = GENL_UNS_ADMIN_PERM,
11431                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11432                                   NL80211_FLAG_NEED_RTNL,
11433         },
11434 #endif
11435         {
11436                 .cmd = NL80211_CMD_CONNECT,
11437                 .doit = nl80211_connect,
11438                 .policy = nl80211_policy,
11439                 .flags = GENL_UNS_ADMIN_PERM,
11440                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11441                                   NL80211_FLAG_NEED_RTNL,
11442         },
11443         {
11444                 .cmd = NL80211_CMD_DISCONNECT,
11445                 .doit = nl80211_disconnect,
11446                 .policy = nl80211_policy,
11447                 .flags = GENL_UNS_ADMIN_PERM,
11448                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11449                                   NL80211_FLAG_NEED_RTNL,
11450         },
11451         {
11452                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11453                 .doit = nl80211_wiphy_netns,
11454                 .policy = nl80211_policy,
11455                 .flags = GENL_UNS_ADMIN_PERM,
11456                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11457                                   NL80211_FLAG_NEED_RTNL,
11458         },
11459         {
11460                 .cmd = NL80211_CMD_GET_SURVEY,
11461                 .policy = nl80211_policy,
11462                 .dumpit = nl80211_dump_survey,
11463         },
11464         {
11465                 .cmd = NL80211_CMD_SET_PMKSA,
11466                 .doit = nl80211_setdel_pmksa,
11467                 .policy = nl80211_policy,
11468                 .flags = GENL_UNS_ADMIN_PERM,
11469                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11470                                   NL80211_FLAG_NEED_RTNL,
11471         },
11472         {
11473                 .cmd = NL80211_CMD_DEL_PMKSA,
11474                 .doit = nl80211_setdel_pmksa,
11475                 .policy = nl80211_policy,
11476                 .flags = GENL_UNS_ADMIN_PERM,
11477                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11478                                   NL80211_FLAG_NEED_RTNL,
11479         },
11480         {
11481                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11482                 .doit = nl80211_flush_pmksa,
11483                 .policy = nl80211_policy,
11484                 .flags = GENL_UNS_ADMIN_PERM,
11485                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11486                                   NL80211_FLAG_NEED_RTNL,
11487         },
11488         {
11489                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11490                 .doit = nl80211_remain_on_channel,
11491                 .policy = nl80211_policy,
11492                 .flags = GENL_UNS_ADMIN_PERM,
11493                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11494                                   NL80211_FLAG_NEED_RTNL,
11495         },
11496         {
11497                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11498                 .doit = nl80211_cancel_remain_on_channel,
11499                 .policy = nl80211_policy,
11500                 .flags = GENL_UNS_ADMIN_PERM,
11501                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11502                                   NL80211_FLAG_NEED_RTNL,
11503         },
11504         {
11505                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11506                 .doit = nl80211_set_tx_bitrate_mask,
11507                 .policy = nl80211_policy,
11508                 .flags = GENL_UNS_ADMIN_PERM,
11509                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11510                                   NL80211_FLAG_NEED_RTNL,
11511         },
11512         {
11513                 .cmd = NL80211_CMD_REGISTER_FRAME,
11514                 .doit = nl80211_register_mgmt,
11515                 .policy = nl80211_policy,
11516                 .flags = GENL_UNS_ADMIN_PERM,
11517                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11518                                   NL80211_FLAG_NEED_RTNL,
11519         },
11520         {
11521                 .cmd = NL80211_CMD_FRAME,
11522                 .doit = nl80211_tx_mgmt,
11523                 .policy = nl80211_policy,
11524                 .flags = GENL_UNS_ADMIN_PERM,
11525                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11526                                   NL80211_FLAG_NEED_RTNL,
11527         },
11528         {
11529                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11530                 .doit = nl80211_tx_mgmt_cancel_wait,
11531                 .policy = nl80211_policy,
11532                 .flags = GENL_UNS_ADMIN_PERM,
11533                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11534                                   NL80211_FLAG_NEED_RTNL,
11535         },
11536         {
11537                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11538                 .doit = nl80211_set_power_save,
11539                 .policy = nl80211_policy,
11540                 .flags = GENL_UNS_ADMIN_PERM,
11541                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11542                                   NL80211_FLAG_NEED_RTNL,
11543         },
11544         {
11545                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11546                 .doit = nl80211_get_power_save,
11547                 .policy = nl80211_policy,
11548                 /* can be retrieved by unprivileged users */
11549                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11550                                   NL80211_FLAG_NEED_RTNL,
11551         },
11552         {
11553                 .cmd = NL80211_CMD_SET_CQM,
11554                 .doit = nl80211_set_cqm,
11555                 .policy = nl80211_policy,
11556                 .flags = GENL_UNS_ADMIN_PERM,
11557                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11558                                   NL80211_FLAG_NEED_RTNL,
11559         },
11560         {
11561                 .cmd = NL80211_CMD_SET_CHANNEL,
11562                 .doit = nl80211_set_channel,
11563                 .policy = nl80211_policy,
11564                 .flags = GENL_UNS_ADMIN_PERM,
11565                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11566                                   NL80211_FLAG_NEED_RTNL,
11567         },
11568         {
11569                 .cmd = NL80211_CMD_SET_WDS_PEER,
11570                 .doit = nl80211_set_wds_peer,
11571                 .policy = nl80211_policy,
11572                 .flags = GENL_UNS_ADMIN_PERM,
11573                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11574                                   NL80211_FLAG_NEED_RTNL,
11575         },
11576         {
11577                 .cmd = NL80211_CMD_JOIN_MESH,
11578                 .doit = nl80211_join_mesh,
11579                 .policy = nl80211_policy,
11580                 .flags = GENL_UNS_ADMIN_PERM,
11581                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11582                                   NL80211_FLAG_NEED_RTNL,
11583         },
11584         {
11585                 .cmd = NL80211_CMD_LEAVE_MESH,
11586                 .doit = nl80211_leave_mesh,
11587                 .policy = nl80211_policy,
11588                 .flags = GENL_UNS_ADMIN_PERM,
11589                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11590                                   NL80211_FLAG_NEED_RTNL,
11591         },
11592         {
11593                 .cmd = NL80211_CMD_JOIN_OCB,
11594                 .doit = nl80211_join_ocb,
11595                 .policy = nl80211_policy,
11596                 .flags = GENL_UNS_ADMIN_PERM,
11597                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11598                                   NL80211_FLAG_NEED_RTNL,
11599         },
11600         {
11601                 .cmd = NL80211_CMD_LEAVE_OCB,
11602                 .doit = nl80211_leave_ocb,
11603                 .policy = nl80211_policy,
11604                 .flags = GENL_UNS_ADMIN_PERM,
11605                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11606                                   NL80211_FLAG_NEED_RTNL,
11607         },
11608 #ifdef CONFIG_PM
11609         {
11610                 .cmd = NL80211_CMD_GET_WOWLAN,
11611                 .doit = nl80211_get_wowlan,
11612                 .policy = nl80211_policy,
11613                 /* can be retrieved by unprivileged users */
11614                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11615                                   NL80211_FLAG_NEED_RTNL,
11616         },
11617         {
11618                 .cmd = NL80211_CMD_SET_WOWLAN,
11619                 .doit = nl80211_set_wowlan,
11620                 .policy = nl80211_policy,
11621                 .flags = GENL_UNS_ADMIN_PERM,
11622                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11623                                   NL80211_FLAG_NEED_RTNL,
11624         },
11625 #endif
11626         {
11627                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11628                 .doit = nl80211_set_rekey_data,
11629                 .policy = nl80211_policy,
11630                 .flags = GENL_UNS_ADMIN_PERM,
11631                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11632                                   NL80211_FLAG_NEED_RTNL |
11633                                   NL80211_FLAG_CLEAR_SKB,
11634         },
11635         {
11636                 .cmd = NL80211_CMD_TDLS_MGMT,
11637                 .doit = nl80211_tdls_mgmt,
11638                 .policy = nl80211_policy,
11639                 .flags = GENL_UNS_ADMIN_PERM,
11640                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11641                                   NL80211_FLAG_NEED_RTNL,
11642         },
11643         {
11644                 .cmd = NL80211_CMD_TDLS_OPER,
11645                 .doit = nl80211_tdls_oper,
11646                 .policy = nl80211_policy,
11647                 .flags = GENL_UNS_ADMIN_PERM,
11648                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11649                                   NL80211_FLAG_NEED_RTNL,
11650         },
11651         {
11652                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11653                 .doit = nl80211_register_unexpected_frame,
11654                 .policy = nl80211_policy,
11655                 .flags = GENL_UNS_ADMIN_PERM,
11656                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11657                                   NL80211_FLAG_NEED_RTNL,
11658         },
11659         {
11660                 .cmd = NL80211_CMD_PROBE_CLIENT,
11661                 .doit = nl80211_probe_client,
11662                 .policy = nl80211_policy,
11663                 .flags = GENL_UNS_ADMIN_PERM,
11664                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11665                                   NL80211_FLAG_NEED_RTNL,
11666         },
11667         {
11668                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11669                 .doit = nl80211_register_beacons,
11670                 .policy = nl80211_policy,
11671                 .flags = GENL_UNS_ADMIN_PERM,
11672                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11673                                   NL80211_FLAG_NEED_RTNL,
11674         },
11675         {
11676                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11677                 .doit = nl80211_set_noack_map,
11678                 .policy = nl80211_policy,
11679                 .flags = GENL_UNS_ADMIN_PERM,
11680                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11681                                   NL80211_FLAG_NEED_RTNL,
11682         },
11683         {
11684                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11685                 .doit = nl80211_start_p2p_device,
11686                 .policy = nl80211_policy,
11687                 .flags = GENL_UNS_ADMIN_PERM,
11688                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11689                                   NL80211_FLAG_NEED_RTNL,
11690         },
11691         {
11692                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11693                 .doit = nl80211_stop_p2p_device,
11694                 .policy = nl80211_policy,
11695                 .flags = GENL_UNS_ADMIN_PERM,
11696                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11697                                   NL80211_FLAG_NEED_RTNL,
11698         },
11699         {
11700                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11701                 .doit = nl80211_set_mcast_rate,
11702                 .policy = nl80211_policy,
11703                 .flags = GENL_UNS_ADMIN_PERM,
11704                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11705                                   NL80211_FLAG_NEED_RTNL,
11706         },
11707         {
11708                 .cmd = NL80211_CMD_SET_MAC_ACL,
11709                 .doit = nl80211_set_mac_acl,
11710                 .policy = nl80211_policy,
11711                 .flags = GENL_UNS_ADMIN_PERM,
11712                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11713                                   NL80211_FLAG_NEED_RTNL,
11714         },
11715         {
11716                 .cmd = NL80211_CMD_RADAR_DETECT,
11717                 .doit = nl80211_start_radar_detection,
11718                 .policy = nl80211_policy,
11719                 .flags = GENL_UNS_ADMIN_PERM,
11720                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11721                                   NL80211_FLAG_NEED_RTNL,
11722         },
11723         {
11724                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11725                 .doit = nl80211_get_protocol_features,
11726                 .policy = nl80211_policy,
11727         },
11728         {
11729                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11730                 .doit = nl80211_update_ft_ies,
11731                 .policy = nl80211_policy,
11732                 .flags = GENL_UNS_ADMIN_PERM,
11733                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11734                                   NL80211_FLAG_NEED_RTNL,
11735         },
11736         {
11737                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11738                 .doit = nl80211_crit_protocol_start,
11739                 .policy = nl80211_policy,
11740                 .flags = GENL_UNS_ADMIN_PERM,
11741                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11742                                   NL80211_FLAG_NEED_RTNL,
11743         },
11744         {
11745                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11746                 .doit = nl80211_crit_protocol_stop,
11747                 .policy = nl80211_policy,
11748                 .flags = GENL_UNS_ADMIN_PERM,
11749                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11750                                   NL80211_FLAG_NEED_RTNL,
11751         },
11752         {
11753                 .cmd = NL80211_CMD_GET_COALESCE,
11754                 .doit = nl80211_get_coalesce,
11755                 .policy = nl80211_policy,
11756                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11757                                   NL80211_FLAG_NEED_RTNL,
11758         },
11759         {
11760                 .cmd = NL80211_CMD_SET_COALESCE,
11761                 .doit = nl80211_set_coalesce,
11762                 .policy = nl80211_policy,
11763                 .flags = GENL_UNS_ADMIN_PERM,
11764                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11765                                   NL80211_FLAG_NEED_RTNL,
11766         },
11767         {
11768                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11769                 .doit = nl80211_channel_switch,
11770                 .policy = nl80211_policy,
11771                 .flags = GENL_UNS_ADMIN_PERM,
11772                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11773                                   NL80211_FLAG_NEED_RTNL,
11774         },
11775         {
11776                 .cmd = NL80211_CMD_VENDOR,
11777                 .doit = nl80211_vendor_cmd,
11778                 .dumpit = nl80211_vendor_cmd_dump,
11779                 .policy = nl80211_policy,
11780                 .flags = GENL_UNS_ADMIN_PERM,
11781                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11782                                   NL80211_FLAG_NEED_RTNL,
11783         },
11784         {
11785                 .cmd = NL80211_CMD_SET_QOS_MAP,
11786                 .doit = nl80211_set_qos_map,
11787                 .policy = nl80211_policy,
11788                 .flags = GENL_UNS_ADMIN_PERM,
11789                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11790                                   NL80211_FLAG_NEED_RTNL,
11791         },
11792         {
11793                 .cmd = NL80211_CMD_ADD_TX_TS,
11794                 .doit = nl80211_add_tx_ts,
11795                 .policy = nl80211_policy,
11796                 .flags = GENL_UNS_ADMIN_PERM,
11797                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11798                                   NL80211_FLAG_NEED_RTNL,
11799         },
11800         {
11801                 .cmd = NL80211_CMD_DEL_TX_TS,
11802                 .doit = nl80211_del_tx_ts,
11803                 .policy = nl80211_policy,
11804                 .flags = GENL_UNS_ADMIN_PERM,
11805                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11806                                   NL80211_FLAG_NEED_RTNL,
11807         },
11808         {
11809                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11810                 .doit = nl80211_tdls_channel_switch,
11811                 .policy = nl80211_policy,
11812                 .flags = GENL_UNS_ADMIN_PERM,
11813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11814                                   NL80211_FLAG_NEED_RTNL,
11815         },
11816         {
11817                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11818                 .doit = nl80211_tdls_cancel_channel_switch,
11819                 .policy = nl80211_policy,
11820                 .flags = GENL_UNS_ADMIN_PERM,
11821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11822                                   NL80211_FLAG_NEED_RTNL,
11823         },
11824 };
11825
11826 /* notification functions */
11827
11828 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11829                           enum nl80211_commands cmd)
11830 {
11831         struct sk_buff *msg;
11832         struct nl80211_dump_wiphy_state state = {};
11833
11834         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11835                 cmd != NL80211_CMD_DEL_WIPHY);
11836
11837         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11838         if (!msg)
11839                 return;
11840
11841         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11842                 nlmsg_free(msg);
11843                 return;
11844         }
11845
11846         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11847                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11848 }
11849
11850 static int nl80211_add_scan_req(struct sk_buff *msg,
11851                                 struct cfg80211_registered_device *rdev)
11852 {
11853         struct cfg80211_scan_request *req = rdev->scan_req;
11854         struct nlattr *nest;
11855         int i;
11856
11857         if (WARN_ON(!req))
11858                 return 0;
11859
11860         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11861         if (!nest)
11862                 goto nla_put_failure;
11863         for (i = 0; i < req->n_ssids; i++) {
11864                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11865                         goto nla_put_failure;
11866         }
11867         nla_nest_end(msg, nest);
11868
11869         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11870         if (!nest)
11871                 goto nla_put_failure;
11872         for (i = 0; i < req->n_channels; i++) {
11873                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11874                         goto nla_put_failure;
11875         }
11876         nla_nest_end(msg, nest);
11877
11878         if (req->ie &&
11879             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11880                 goto nla_put_failure;
11881
11882         if (req->flags &&
11883             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11884                 goto nla_put_failure;
11885
11886         if (req->info.scan_start_tsf &&
11887             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
11888                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
11889              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
11890                      req->info.tsf_bssid)))
11891                 goto nla_put_failure;
11892
11893         return 0;
11894  nla_put_failure:
11895         return -ENOBUFS;
11896 }
11897
11898 static int nl80211_send_scan_msg(struct sk_buff *msg,
11899                                  struct cfg80211_registered_device *rdev,
11900                                  struct wireless_dev *wdev,
11901                                  u32 portid, u32 seq, int flags,
11902                                  u32 cmd)
11903 {
11904         void *hdr;
11905
11906         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11907         if (!hdr)
11908                 return -1;
11909
11910         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11911             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11912                                          wdev->netdev->ifindex)) ||
11913             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11914                               NL80211_ATTR_PAD))
11915                 goto nla_put_failure;
11916
11917         /* ignore errors and send incomplete event anyway */
11918         nl80211_add_scan_req(msg, rdev);
11919
11920         genlmsg_end(msg, hdr);
11921         return 0;
11922
11923  nla_put_failure:
11924         genlmsg_cancel(msg, hdr);
11925         return -EMSGSIZE;
11926 }
11927
11928 static int
11929 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11930                             struct cfg80211_registered_device *rdev,
11931                             struct net_device *netdev,
11932                             u32 portid, u32 seq, int flags, u32 cmd)
11933 {
11934         void *hdr;
11935
11936         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11937         if (!hdr)
11938                 return -1;
11939
11940         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11941             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11942                 goto nla_put_failure;
11943
11944         genlmsg_end(msg, hdr);
11945         return 0;
11946
11947  nla_put_failure:
11948         genlmsg_cancel(msg, hdr);
11949         return -EMSGSIZE;
11950 }
11951
11952 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11953                              struct wireless_dev *wdev)
11954 {
11955         struct sk_buff *msg;
11956
11957         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11958         if (!msg)
11959                 return;
11960
11961         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11962                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11963                 nlmsg_free(msg);
11964                 return;
11965         }
11966
11967         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11968                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11969 }
11970
11971 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11972                                        struct wireless_dev *wdev, bool aborted)
11973 {
11974         struct sk_buff *msg;
11975
11976         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11977         if (!msg)
11978                 return NULL;
11979
11980         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11981                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11982                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11983                 nlmsg_free(msg);
11984                 return NULL;
11985         }
11986
11987         return msg;
11988 }
11989
11990 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11991                               struct sk_buff *msg)
11992 {
11993         if (!msg)
11994                 return;
11995
11996         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11997                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11998 }
11999
12000 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12001                                      struct net_device *netdev)
12002 {
12003         struct sk_buff *msg;
12004
12005         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12006         if (!msg)
12007                 return;
12008
12009         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12010                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12011                 nlmsg_free(msg);
12012                 return;
12013         }
12014
12015         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12016                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12017 }
12018
12019 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12020                              struct net_device *netdev, u32 cmd)
12021 {
12022         struct sk_buff *msg;
12023
12024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12025         if (!msg)
12026                 return;
12027
12028         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12029                 nlmsg_free(msg);
12030                 return;
12031         }
12032
12033         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12034                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12035 }
12036
12037 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12038                                           struct regulatory_request *request)
12039 {
12040         /* Userspace can always count this one always being set */
12041         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12042                 goto nla_put_failure;
12043
12044         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12045                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12046                                NL80211_REGDOM_TYPE_WORLD))
12047                         goto nla_put_failure;
12048         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12049                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12050                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12051                         goto nla_put_failure;
12052         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12053                    request->intersect) {
12054                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12055                                NL80211_REGDOM_TYPE_INTERSECTION))
12056                         goto nla_put_failure;
12057         } else {
12058                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12059                                NL80211_REGDOM_TYPE_COUNTRY) ||
12060                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12061                                    request->alpha2))
12062                         goto nla_put_failure;
12063         }
12064
12065         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12066                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12067
12068                 if (wiphy &&
12069                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12070                         goto nla_put_failure;
12071
12072                 if (wiphy &&
12073                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12074                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12075                         goto nla_put_failure;
12076         }
12077
12078         return true;
12079
12080 nla_put_failure:
12081         return false;
12082 }
12083
12084 /*
12085  * This can happen on global regulatory changes or device specific settings
12086  * based on custom regulatory domains.
12087  */
12088 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12089                                      struct regulatory_request *request)
12090 {
12091         struct sk_buff *msg;
12092         void *hdr;
12093
12094         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12095         if (!msg)
12096                 return;
12097
12098         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12099         if (!hdr) {
12100                 nlmsg_free(msg);
12101                 return;
12102         }
12103
12104         if (nl80211_reg_change_event_fill(msg, request) == false)
12105                 goto nla_put_failure;
12106
12107         genlmsg_end(msg, hdr);
12108
12109         rcu_read_lock();
12110         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12111                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12112         rcu_read_unlock();
12113
12114         return;
12115
12116 nla_put_failure:
12117         genlmsg_cancel(msg, hdr);
12118         nlmsg_free(msg);
12119 }
12120
12121 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12122                                     struct net_device *netdev,
12123                                     const u8 *buf, size_t len,
12124                                     enum nl80211_commands cmd, gfp_t gfp,
12125                                     int uapsd_queues)
12126 {
12127         struct sk_buff *msg;
12128         void *hdr;
12129
12130         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12131         if (!msg)
12132                 return;
12133
12134         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12135         if (!hdr) {
12136                 nlmsg_free(msg);
12137                 return;
12138         }
12139
12140         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12141             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12142             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12143                 goto nla_put_failure;
12144
12145         if (uapsd_queues >= 0) {
12146                 struct nlattr *nla_wmm =
12147                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12148                 if (!nla_wmm)
12149                         goto nla_put_failure;
12150
12151                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12152                                uapsd_queues))
12153                         goto nla_put_failure;
12154
12155                 nla_nest_end(msg, nla_wmm);
12156         }
12157
12158         genlmsg_end(msg, hdr);
12159
12160         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12161                                 NL80211_MCGRP_MLME, gfp);
12162         return;
12163
12164  nla_put_failure:
12165         genlmsg_cancel(msg, hdr);
12166         nlmsg_free(msg);
12167 }
12168
12169 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12170                           struct net_device *netdev, const u8 *buf,
12171                           size_t len, gfp_t gfp)
12172 {
12173         nl80211_send_mlme_event(rdev, netdev, buf, len,
12174                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12175 }
12176
12177 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12178                            struct net_device *netdev, const u8 *buf,
12179                            size_t len, gfp_t gfp, int uapsd_queues)
12180 {
12181         nl80211_send_mlme_event(rdev, netdev, buf, len,
12182                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12183 }
12184
12185 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12186                          struct net_device *netdev, const u8 *buf,
12187                          size_t len, gfp_t gfp)
12188 {
12189         nl80211_send_mlme_event(rdev, netdev, buf, len,
12190                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12191 }
12192
12193 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12194                            struct net_device *netdev, const u8 *buf,
12195                            size_t len, gfp_t gfp)
12196 {
12197         nl80211_send_mlme_event(rdev, netdev, buf, len,
12198                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12199 }
12200
12201 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12202                                   size_t len)
12203 {
12204         struct wireless_dev *wdev = dev->ieee80211_ptr;
12205         struct wiphy *wiphy = wdev->wiphy;
12206         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12207         const struct ieee80211_mgmt *mgmt = (void *)buf;
12208         u32 cmd;
12209
12210         if (WARN_ON(len < 2))
12211                 return;
12212
12213         if (ieee80211_is_deauth(mgmt->frame_control))
12214                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12215         else
12216                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12217
12218         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12219         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12220 }
12221 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12222
12223 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12224                                       struct net_device *netdev, int cmd,
12225                                       const u8 *addr, gfp_t gfp)
12226 {
12227         struct sk_buff *msg;
12228         void *hdr;
12229
12230         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12231         if (!msg)
12232                 return;
12233
12234         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12235         if (!hdr) {
12236                 nlmsg_free(msg);
12237                 return;
12238         }
12239
12240         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12241             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12242             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12243             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12244                 goto nla_put_failure;
12245
12246         genlmsg_end(msg, hdr);
12247
12248         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12249                                 NL80211_MCGRP_MLME, gfp);
12250         return;
12251
12252  nla_put_failure:
12253         genlmsg_cancel(msg, hdr);
12254         nlmsg_free(msg);
12255 }
12256
12257 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12258                                struct net_device *netdev, const u8 *addr,
12259                                gfp_t gfp)
12260 {
12261         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12262                                   addr, gfp);
12263 }
12264
12265 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12266                                 struct net_device *netdev, const u8 *addr,
12267                                 gfp_t gfp)
12268 {
12269         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12270                                   addr, gfp);
12271 }
12272
12273 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12274                                  struct net_device *netdev, const u8 *bssid,
12275                                  const u8 *req_ie, size_t req_ie_len,
12276                                  const u8 *resp_ie, size_t resp_ie_len,
12277                                  int status, gfp_t gfp)
12278 {
12279         struct sk_buff *msg;
12280         void *hdr;
12281
12282         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12283         if (!msg)
12284                 return;
12285
12286         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12287         if (!hdr) {
12288                 nlmsg_free(msg);
12289                 return;
12290         }
12291
12292         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12293             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12294             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12295             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12296                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12297                         status) ||
12298             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12299             (req_ie &&
12300              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12301             (resp_ie &&
12302              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12303                 goto nla_put_failure;
12304
12305         genlmsg_end(msg, hdr);
12306
12307         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12308                                 NL80211_MCGRP_MLME, gfp);
12309         return;
12310
12311  nla_put_failure:
12312         genlmsg_cancel(msg, hdr);
12313         nlmsg_free(msg);
12314 }
12315
12316 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12317                          struct net_device *netdev, const u8 *bssid,
12318                          const u8 *req_ie, size_t req_ie_len,
12319                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12320 {
12321         struct sk_buff *msg;
12322         void *hdr;
12323
12324         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12325         if (!msg)
12326                 return;
12327
12328         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12329         if (!hdr) {
12330                 nlmsg_free(msg);
12331                 return;
12332         }
12333
12334         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12335             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12336             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12337             (req_ie &&
12338              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12339             (resp_ie &&
12340              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12341                 goto nla_put_failure;
12342
12343         genlmsg_end(msg, hdr);
12344
12345         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12346                                 NL80211_MCGRP_MLME, gfp);
12347         return;
12348
12349  nla_put_failure:
12350         genlmsg_cancel(msg, hdr);
12351         nlmsg_free(msg);
12352 }
12353
12354 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12355                                struct net_device *netdev, u16 reason,
12356                                const u8 *ie, size_t ie_len, bool from_ap)
12357 {
12358         struct sk_buff *msg;
12359         void *hdr;
12360
12361         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12362         if (!msg)
12363                 return;
12364
12365         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12366         if (!hdr) {
12367                 nlmsg_free(msg);
12368                 return;
12369         }
12370
12371         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12372             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12373             (from_ap && reason &&
12374              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12375             (from_ap &&
12376              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12377             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12378                 goto nla_put_failure;
12379
12380         genlmsg_end(msg, hdr);
12381
12382         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12383                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12384         return;
12385
12386  nla_put_failure:
12387         genlmsg_cancel(msg, hdr);
12388         nlmsg_free(msg);
12389 }
12390
12391 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12392                              struct net_device *netdev, const u8 *bssid,
12393                              gfp_t gfp)
12394 {
12395         struct sk_buff *msg;
12396         void *hdr;
12397
12398         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12399         if (!msg)
12400                 return;
12401
12402         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12403         if (!hdr) {
12404                 nlmsg_free(msg);
12405                 return;
12406         }
12407
12408         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12409             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12410             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12411                 goto nla_put_failure;
12412
12413         genlmsg_end(msg, hdr);
12414
12415         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12416                                 NL80211_MCGRP_MLME, gfp);
12417         return;
12418
12419  nla_put_failure:
12420         genlmsg_cancel(msg, hdr);
12421         nlmsg_free(msg);
12422 }
12423
12424 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12425                                         const u8* ie, u8 ie_len, gfp_t gfp)
12426 {
12427         struct wireless_dev *wdev = dev->ieee80211_ptr;
12428         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12429         struct sk_buff *msg;
12430         void *hdr;
12431
12432         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12433                 return;
12434
12435         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12436
12437         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12438         if (!msg)
12439                 return;
12440
12441         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12442         if (!hdr) {
12443                 nlmsg_free(msg);
12444                 return;
12445         }
12446
12447         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12448             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12449             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12450             (ie_len && ie &&
12451              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12452                 goto nla_put_failure;
12453
12454         genlmsg_end(msg, hdr);
12455
12456         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12457                                 NL80211_MCGRP_MLME, gfp);
12458         return;
12459
12460  nla_put_failure:
12461         genlmsg_cancel(msg, hdr);
12462         nlmsg_free(msg);
12463 }
12464 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12465
12466 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12467                                  struct net_device *netdev, const u8 *addr,
12468                                  enum nl80211_key_type key_type, int key_id,
12469                                  const u8 *tsc, gfp_t gfp)
12470 {
12471         struct sk_buff *msg;
12472         void *hdr;
12473
12474         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12475         if (!msg)
12476                 return;
12477
12478         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12479         if (!hdr) {
12480                 nlmsg_free(msg);
12481                 return;
12482         }
12483
12484         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12485             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12486             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12487             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12488             (key_id != -1 &&
12489              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12490             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12491                 goto nla_put_failure;
12492
12493         genlmsg_end(msg, hdr);
12494
12495         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12496                                 NL80211_MCGRP_MLME, gfp);
12497         return;
12498
12499  nla_put_failure:
12500         genlmsg_cancel(msg, hdr);
12501         nlmsg_free(msg);
12502 }
12503
12504 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12505                                     struct ieee80211_channel *channel_before,
12506                                     struct ieee80211_channel *channel_after)
12507 {
12508         struct sk_buff *msg;
12509         void *hdr;
12510         struct nlattr *nl_freq;
12511
12512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12513         if (!msg)
12514                 return;
12515
12516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12517         if (!hdr) {
12518                 nlmsg_free(msg);
12519                 return;
12520         }
12521
12522         /*
12523          * Since we are applying the beacon hint to a wiphy we know its
12524          * wiphy_idx is valid
12525          */
12526         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12527                 goto nla_put_failure;
12528
12529         /* Before */
12530         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12531         if (!nl_freq)
12532                 goto nla_put_failure;
12533         if (nl80211_msg_put_channel(msg, channel_before, false))
12534                 goto nla_put_failure;
12535         nla_nest_end(msg, nl_freq);
12536
12537         /* After */
12538         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12539         if (!nl_freq)
12540                 goto nla_put_failure;
12541         if (nl80211_msg_put_channel(msg, channel_after, false))
12542                 goto nla_put_failure;
12543         nla_nest_end(msg, nl_freq);
12544
12545         genlmsg_end(msg, hdr);
12546
12547         rcu_read_lock();
12548         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12549                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12550         rcu_read_unlock();
12551
12552         return;
12553
12554 nla_put_failure:
12555         genlmsg_cancel(msg, hdr);
12556         nlmsg_free(msg);
12557 }
12558
12559 static void nl80211_send_remain_on_chan_event(
12560         int cmd, struct cfg80211_registered_device *rdev,
12561         struct wireless_dev *wdev, u64 cookie,
12562         struct ieee80211_channel *chan,
12563         unsigned int duration, gfp_t gfp)
12564 {
12565         struct sk_buff *msg;
12566         void *hdr;
12567
12568         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12569         if (!msg)
12570                 return;
12571
12572         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12573         if (!hdr) {
12574                 nlmsg_free(msg);
12575                 return;
12576         }
12577
12578         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12579             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12580                                          wdev->netdev->ifindex)) ||
12581             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12582                               NL80211_ATTR_PAD) ||
12583             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12584             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12585                         NL80211_CHAN_NO_HT) ||
12586             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12587                               NL80211_ATTR_PAD))
12588                 goto nla_put_failure;
12589
12590         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12591             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12592                 goto nla_put_failure;
12593
12594         genlmsg_end(msg, hdr);
12595
12596         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12597                                 NL80211_MCGRP_MLME, gfp);
12598         return;
12599
12600  nla_put_failure:
12601         genlmsg_cancel(msg, hdr);
12602         nlmsg_free(msg);
12603 }
12604
12605 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12606                                struct ieee80211_channel *chan,
12607                                unsigned int duration, gfp_t gfp)
12608 {
12609         struct wiphy *wiphy = wdev->wiphy;
12610         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12611
12612         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12613         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12614                                           rdev, wdev, cookie, chan,
12615                                           duration, gfp);
12616 }
12617 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12618
12619 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12620                                         struct ieee80211_channel *chan,
12621                                         gfp_t gfp)
12622 {
12623         struct wiphy *wiphy = wdev->wiphy;
12624         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12625
12626         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12627         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12628                                           rdev, wdev, cookie, chan, 0, gfp);
12629 }
12630 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12631
12632 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12633                       struct station_info *sinfo, gfp_t gfp)
12634 {
12635         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12636         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12637         struct sk_buff *msg;
12638
12639         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12640
12641         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12642         if (!msg)
12643                 return;
12644
12645         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12646                                  rdev, dev, mac_addr, sinfo) < 0) {
12647                 nlmsg_free(msg);
12648                 return;
12649         }
12650
12651         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12652                                 NL80211_MCGRP_MLME, gfp);
12653 }
12654 EXPORT_SYMBOL(cfg80211_new_sta);
12655
12656 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12657                             struct station_info *sinfo, gfp_t gfp)
12658 {
12659         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12660         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12661         struct sk_buff *msg;
12662         struct station_info empty_sinfo = {};
12663
12664         if (!sinfo)
12665                 sinfo = &empty_sinfo;
12666
12667         trace_cfg80211_del_sta(dev, mac_addr);
12668
12669         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12670         if (!msg)
12671                 return;
12672
12673         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12674                                  rdev, dev, mac_addr, sinfo) < 0) {
12675                 nlmsg_free(msg);
12676                 return;
12677         }
12678
12679         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12680                                 NL80211_MCGRP_MLME, gfp);
12681 }
12682 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12683
12684 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12685                           enum nl80211_connect_failed_reason reason,
12686                           gfp_t gfp)
12687 {
12688         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12689         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12690         struct sk_buff *msg;
12691         void *hdr;
12692
12693         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12694         if (!msg)
12695                 return;
12696
12697         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12698         if (!hdr) {
12699                 nlmsg_free(msg);
12700                 return;
12701         }
12702
12703         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12704             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12705             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12706                 goto nla_put_failure;
12707
12708         genlmsg_end(msg, hdr);
12709
12710         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12711                                 NL80211_MCGRP_MLME, gfp);
12712         return;
12713
12714  nla_put_failure:
12715         genlmsg_cancel(msg, hdr);
12716         nlmsg_free(msg);
12717 }
12718 EXPORT_SYMBOL(cfg80211_conn_failed);
12719
12720 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12721                                        const u8 *addr, gfp_t gfp)
12722 {
12723         struct wireless_dev *wdev = dev->ieee80211_ptr;
12724         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12725         struct sk_buff *msg;
12726         void *hdr;
12727         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12728
12729         if (!nlportid)
12730                 return false;
12731
12732         msg = nlmsg_new(100, gfp);
12733         if (!msg)
12734                 return true;
12735
12736         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12737         if (!hdr) {
12738                 nlmsg_free(msg);
12739                 return true;
12740         }
12741
12742         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12743             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12744             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12745                 goto nla_put_failure;
12746
12747         genlmsg_end(msg, hdr);
12748         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12749         return true;
12750
12751  nla_put_failure:
12752         genlmsg_cancel(msg, hdr);
12753         nlmsg_free(msg);
12754         return true;
12755 }
12756
12757 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12758                                 const u8 *addr, gfp_t gfp)
12759 {
12760         struct wireless_dev *wdev = dev->ieee80211_ptr;
12761         bool ret;
12762
12763         trace_cfg80211_rx_spurious_frame(dev, addr);
12764
12765         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12766                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12767                 trace_cfg80211_return_bool(false);
12768                 return false;
12769         }
12770         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12771                                          addr, gfp);
12772         trace_cfg80211_return_bool(ret);
12773         return ret;
12774 }
12775 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12776
12777 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12778                                         const u8 *addr, gfp_t gfp)
12779 {
12780         struct wireless_dev *wdev = dev->ieee80211_ptr;
12781         bool ret;
12782
12783         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12784
12785         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12786                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12787                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12788                 trace_cfg80211_return_bool(false);
12789                 return false;
12790         }
12791         ret = __nl80211_unexpected_frame(dev,
12792                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12793                                          addr, gfp);
12794         trace_cfg80211_return_bool(ret);
12795         return ret;
12796 }
12797 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12798
12799 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12800                       struct wireless_dev *wdev, u32 nlportid,
12801                       int freq, int sig_dbm,
12802                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12803 {
12804         struct net_device *netdev = wdev->netdev;
12805         struct sk_buff *msg;
12806         void *hdr;
12807
12808         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12809         if (!msg)
12810                 return -ENOMEM;
12811
12812         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12813         if (!hdr) {
12814                 nlmsg_free(msg);
12815                 return -ENOMEM;
12816         }
12817
12818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12819             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12820                                         netdev->ifindex)) ||
12821             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12822                               NL80211_ATTR_PAD) ||
12823             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12824             (sig_dbm &&
12825              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12826             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12827             (flags &&
12828              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12829                 goto nla_put_failure;
12830
12831         genlmsg_end(msg, hdr);
12832
12833         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12834
12835  nla_put_failure:
12836         genlmsg_cancel(msg, hdr);
12837         nlmsg_free(msg);
12838         return -ENOBUFS;
12839 }
12840
12841 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12842                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12843 {
12844         struct wiphy *wiphy = wdev->wiphy;
12845         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12846         struct net_device *netdev = wdev->netdev;
12847         struct sk_buff *msg;
12848         void *hdr;
12849
12850         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12851
12852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12853         if (!msg)
12854                 return;
12855
12856         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12857         if (!hdr) {
12858                 nlmsg_free(msg);
12859                 return;
12860         }
12861
12862         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12863             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12864                                    netdev->ifindex)) ||
12865             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12866                               NL80211_ATTR_PAD) ||
12867             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12868             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12869                               NL80211_ATTR_PAD) ||
12870             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12871                 goto nla_put_failure;
12872
12873         genlmsg_end(msg, hdr);
12874
12875         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12876                                 NL80211_MCGRP_MLME, gfp);
12877         return;
12878
12879  nla_put_failure:
12880         genlmsg_cancel(msg, hdr);
12881         nlmsg_free(msg);
12882 }
12883 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12884
12885 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12886                                             const char *mac, gfp_t gfp)
12887 {
12888         struct wireless_dev *wdev = dev->ieee80211_ptr;
12889         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12890         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12891         void **cb;
12892
12893         if (!msg)
12894                 return NULL;
12895
12896         cb = (void **)msg->cb;
12897
12898         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12899         if (!cb[0]) {
12900                 nlmsg_free(msg);
12901                 return NULL;
12902         }
12903
12904         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12905             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12906                 goto nla_put_failure;
12907
12908         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12909                 goto nla_put_failure;
12910
12911         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12912         if (!cb[1])
12913                 goto nla_put_failure;
12914
12915         cb[2] = rdev;
12916
12917         return msg;
12918  nla_put_failure:
12919         nlmsg_free(msg);
12920         return NULL;
12921 }
12922
12923 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12924 {
12925         void **cb = (void **)msg->cb;
12926         struct cfg80211_registered_device *rdev = cb[2];
12927
12928         nla_nest_end(msg, cb[1]);
12929         genlmsg_end(msg, cb[0]);
12930
12931         memset(msg->cb, 0, sizeof(msg->cb));
12932
12933         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12934                                 NL80211_MCGRP_MLME, gfp);
12935 }
12936
12937 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12938                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12939                               gfp_t gfp)
12940 {
12941         struct sk_buff *msg;
12942
12943         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12944
12945         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12946                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12947                 return;
12948
12949         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12950         if (!msg)
12951                 return;
12952
12953         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12954                         rssi_event))
12955                 goto nla_put_failure;
12956
12957         cfg80211_send_cqm(msg, gfp);
12958
12959         return;
12960
12961  nla_put_failure:
12962         nlmsg_free(msg);
12963 }
12964 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12965
12966 void cfg80211_cqm_txe_notify(struct net_device *dev,
12967                              const u8 *peer, u32 num_packets,
12968                              u32 rate, u32 intvl, gfp_t gfp)
12969 {
12970         struct sk_buff *msg;
12971
12972         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12973         if (!msg)
12974                 return;
12975
12976         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12977                 goto nla_put_failure;
12978
12979         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12980                 goto nla_put_failure;
12981
12982         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12983                 goto nla_put_failure;
12984
12985         cfg80211_send_cqm(msg, gfp);
12986         return;
12987
12988  nla_put_failure:
12989         nlmsg_free(msg);
12990 }
12991 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12992
12993 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12994                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12995 {
12996         struct sk_buff *msg;
12997
12998         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12999
13000         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13001         if (!msg)
13002                 return;
13003
13004         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13005                 goto nla_put_failure;
13006
13007         cfg80211_send_cqm(msg, gfp);
13008         return;
13009
13010  nla_put_failure:
13011         nlmsg_free(msg);
13012 }
13013 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13014
13015 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13016 {
13017         struct sk_buff *msg;
13018
13019         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13020         if (!msg)
13021                 return;
13022
13023         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13024                 goto nla_put_failure;
13025
13026         cfg80211_send_cqm(msg, gfp);
13027         return;
13028
13029  nla_put_failure:
13030         nlmsg_free(msg);
13031 }
13032 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13033
13034 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13035                                      struct net_device *netdev, const u8 *bssid,
13036                                      const u8 *replay_ctr, gfp_t gfp)
13037 {
13038         struct sk_buff *msg;
13039         struct nlattr *rekey_attr;
13040         void *hdr;
13041
13042         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13043         if (!msg)
13044                 return;
13045
13046         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13047         if (!hdr) {
13048                 nlmsg_free(msg);
13049                 return;
13050         }
13051
13052         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13053             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13054             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13055                 goto nla_put_failure;
13056
13057         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13058         if (!rekey_attr)
13059                 goto nla_put_failure;
13060
13061         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13062                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13063                 goto nla_put_failure;
13064
13065         nla_nest_end(msg, rekey_attr);
13066
13067         genlmsg_end(msg, hdr);
13068
13069         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13070                                 NL80211_MCGRP_MLME, gfp);
13071         return;
13072
13073  nla_put_failure:
13074         genlmsg_cancel(msg, hdr);
13075         nlmsg_free(msg);
13076 }
13077
13078 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13079                                const u8 *replay_ctr, gfp_t gfp)
13080 {
13081         struct wireless_dev *wdev = dev->ieee80211_ptr;
13082         struct wiphy *wiphy = wdev->wiphy;
13083         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13084
13085         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13086         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13087 }
13088 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13089
13090 static void
13091 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13092                                struct net_device *netdev, int index,
13093                                const u8 *bssid, bool preauth, gfp_t gfp)
13094 {
13095         struct sk_buff *msg;
13096         struct nlattr *attr;
13097         void *hdr;
13098
13099         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13100         if (!msg)
13101                 return;
13102
13103         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13104         if (!hdr) {
13105                 nlmsg_free(msg);
13106                 return;
13107         }
13108
13109         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13110             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13111                 goto nla_put_failure;
13112
13113         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13114         if (!attr)
13115                 goto nla_put_failure;
13116
13117         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13118             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13119             (preauth &&
13120              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13121                 goto nla_put_failure;
13122
13123         nla_nest_end(msg, attr);
13124
13125         genlmsg_end(msg, hdr);
13126
13127         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13128                                 NL80211_MCGRP_MLME, gfp);
13129         return;
13130
13131  nla_put_failure:
13132         genlmsg_cancel(msg, hdr);
13133         nlmsg_free(msg);
13134 }
13135
13136 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13137                                      const u8 *bssid, bool preauth, gfp_t gfp)
13138 {
13139         struct wireless_dev *wdev = dev->ieee80211_ptr;
13140         struct wiphy *wiphy = wdev->wiphy;
13141         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13142
13143         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13144         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13145 }
13146 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13147
13148 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13149                                      struct net_device *netdev,
13150                                      struct cfg80211_chan_def *chandef,
13151                                      gfp_t gfp,
13152                                      enum nl80211_commands notif,
13153                                      u8 count)
13154 {
13155         struct sk_buff *msg;
13156         void *hdr;
13157
13158         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13159         if (!msg)
13160                 return;
13161
13162         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13163         if (!hdr) {
13164                 nlmsg_free(msg);
13165                 return;
13166         }
13167
13168         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13169                 goto nla_put_failure;
13170
13171         if (nl80211_send_chandef(msg, chandef))
13172                 goto nla_put_failure;
13173
13174         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13175             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13176                         goto nla_put_failure;
13177
13178         genlmsg_end(msg, hdr);
13179
13180         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13181                                 NL80211_MCGRP_MLME, gfp);
13182         return;
13183
13184  nla_put_failure:
13185         genlmsg_cancel(msg, hdr);
13186         nlmsg_free(msg);
13187 }
13188
13189 void cfg80211_ch_switch_notify(struct net_device *dev,
13190                                struct cfg80211_chan_def *chandef)
13191 {
13192         struct wireless_dev *wdev = dev->ieee80211_ptr;
13193         struct wiphy *wiphy = wdev->wiphy;
13194         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13195
13196         ASSERT_WDEV_LOCK(wdev);
13197
13198         trace_cfg80211_ch_switch_notify(dev, chandef);
13199
13200         wdev->chandef = *chandef;
13201         wdev->preset_chandef = *chandef;
13202         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13203                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13204 }
13205 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13206
13207 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13208                                        struct cfg80211_chan_def *chandef,
13209                                        u8 count)
13210 {
13211         struct wireless_dev *wdev = dev->ieee80211_ptr;
13212         struct wiphy *wiphy = wdev->wiphy;
13213         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13214
13215         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13216
13217         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13218                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13219 }
13220 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13221
13222 void
13223 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13224                      const struct cfg80211_chan_def *chandef,
13225                      enum nl80211_radar_event event,
13226                      struct net_device *netdev, gfp_t gfp)
13227 {
13228         struct sk_buff *msg;
13229         void *hdr;
13230
13231         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13232         if (!msg)
13233                 return;
13234
13235         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13236         if (!hdr) {
13237                 nlmsg_free(msg);
13238                 return;
13239         }
13240
13241         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13242                 goto nla_put_failure;
13243
13244         /* NOP and radar events don't need a netdev parameter */
13245         if (netdev) {
13246                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13247
13248                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13249                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13250                                       NL80211_ATTR_PAD))
13251                         goto nla_put_failure;
13252         }
13253
13254         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13255                 goto nla_put_failure;
13256
13257         if (nl80211_send_chandef(msg, chandef))
13258                 goto nla_put_failure;
13259
13260         genlmsg_end(msg, hdr);
13261
13262         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13263                                 NL80211_MCGRP_MLME, gfp);
13264         return;
13265
13266  nla_put_failure:
13267         genlmsg_cancel(msg, hdr);
13268         nlmsg_free(msg);
13269 }
13270
13271 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13272                            u64 cookie, bool acked, gfp_t gfp)
13273 {
13274         struct wireless_dev *wdev = dev->ieee80211_ptr;
13275         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13276         struct sk_buff *msg;
13277         void *hdr;
13278
13279         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13280
13281         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13282
13283         if (!msg)
13284                 return;
13285
13286         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13287         if (!hdr) {
13288                 nlmsg_free(msg);
13289                 return;
13290         }
13291
13292         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13293             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13294             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13295             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13296                               NL80211_ATTR_PAD) ||
13297             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13298                 goto nla_put_failure;
13299
13300         genlmsg_end(msg, hdr);
13301
13302         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13303                                 NL80211_MCGRP_MLME, gfp);
13304         return;
13305
13306  nla_put_failure:
13307         genlmsg_cancel(msg, hdr);
13308         nlmsg_free(msg);
13309 }
13310 EXPORT_SYMBOL(cfg80211_probe_status);
13311
13312 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13313                                  const u8 *frame, size_t len,
13314                                  int freq, int sig_dbm)
13315 {
13316         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13317         struct sk_buff *msg;
13318         void *hdr;
13319         struct cfg80211_beacon_registration *reg;
13320
13321         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13322
13323         spin_lock_bh(&rdev->beacon_registrations_lock);
13324         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13325                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13326                 if (!msg) {
13327                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13328                         return;
13329                 }
13330
13331                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13332                 if (!hdr)
13333                         goto nla_put_failure;
13334
13335                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13336                     (freq &&
13337                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13338                     (sig_dbm &&
13339                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13340                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13341                         goto nla_put_failure;
13342
13343                 genlmsg_end(msg, hdr);
13344
13345                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13346         }
13347         spin_unlock_bh(&rdev->beacon_registrations_lock);
13348         return;
13349
13350  nla_put_failure:
13351         spin_unlock_bh(&rdev->beacon_registrations_lock);
13352         if (hdr)
13353                 genlmsg_cancel(msg, hdr);
13354         nlmsg_free(msg);
13355 }
13356 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13357
13358 #ifdef CONFIG_PM
13359 static int cfg80211_net_detect_results(struct sk_buff *msg,
13360                                        struct cfg80211_wowlan_wakeup *wakeup)
13361 {
13362         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13363         struct nlattr *nl_results, *nl_match, *nl_freqs;
13364         int i, j;
13365
13366         nl_results = nla_nest_start(
13367                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13368         if (!nl_results)
13369                 return -EMSGSIZE;
13370
13371         for (i = 0; i < nd->n_matches; i++) {
13372                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13373
13374                 nl_match = nla_nest_start(msg, i);
13375                 if (!nl_match)
13376                         break;
13377
13378                 /* The SSID attribute is optional in nl80211, but for
13379                  * simplicity reasons it's always present in the
13380                  * cfg80211 structure.  If a driver can't pass the
13381                  * SSID, that needs to be changed.  A zero length SSID
13382                  * is still a valid SSID (wildcard), so it cannot be
13383                  * used for this purpose.
13384                  */
13385                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13386                             match->ssid.ssid)) {
13387                         nla_nest_cancel(msg, nl_match);
13388                         goto out;
13389                 }
13390
13391                 if (match->n_channels) {
13392                         nl_freqs = nla_nest_start(
13393                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13394                         if (!nl_freqs) {
13395                                 nla_nest_cancel(msg, nl_match);
13396                                 goto out;
13397                         }
13398
13399                         for (j = 0; j < match->n_channels; j++) {
13400                                 if (nla_put_u32(msg, j, match->channels[j])) {
13401                                         nla_nest_cancel(msg, nl_freqs);
13402                                         nla_nest_cancel(msg, nl_match);
13403                                         goto out;
13404                                 }
13405                         }
13406
13407                         nla_nest_end(msg, nl_freqs);
13408                 }
13409
13410                 nla_nest_end(msg, nl_match);
13411         }
13412
13413 out:
13414         nla_nest_end(msg, nl_results);
13415         return 0;
13416 }
13417
13418 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13419                                    struct cfg80211_wowlan_wakeup *wakeup,
13420                                    gfp_t gfp)
13421 {
13422         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13423         struct sk_buff *msg;
13424         void *hdr;
13425         int size = 200;
13426
13427         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13428
13429         if (wakeup)
13430                 size += wakeup->packet_present_len;
13431
13432         msg = nlmsg_new(size, gfp);
13433         if (!msg)
13434                 return;
13435
13436         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13437         if (!hdr)
13438                 goto free_msg;
13439
13440         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13441             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13442                               NL80211_ATTR_PAD))
13443                 goto free_msg;
13444
13445         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13446                                         wdev->netdev->ifindex))
13447                 goto free_msg;
13448
13449         if (wakeup) {
13450                 struct nlattr *reasons;
13451
13452                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13453                 if (!reasons)
13454                         goto free_msg;
13455
13456                 if (wakeup->disconnect &&
13457                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13458                         goto free_msg;
13459                 if (wakeup->magic_pkt &&
13460                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13461                         goto free_msg;
13462                 if (wakeup->gtk_rekey_failure &&
13463                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13464                         goto free_msg;
13465                 if (wakeup->eap_identity_req &&
13466                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13467                         goto free_msg;
13468                 if (wakeup->four_way_handshake &&
13469                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13470                         goto free_msg;
13471                 if (wakeup->rfkill_release &&
13472                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13473                         goto free_msg;
13474
13475                 if (wakeup->pattern_idx >= 0 &&
13476                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13477                                 wakeup->pattern_idx))
13478                         goto free_msg;
13479
13480                 if (wakeup->tcp_match &&
13481                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13482                         goto free_msg;
13483
13484                 if (wakeup->tcp_connlost &&
13485                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13486                         goto free_msg;
13487
13488                 if (wakeup->tcp_nomoretokens &&
13489                     nla_put_flag(msg,
13490                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13491                         goto free_msg;
13492
13493                 if (wakeup->packet) {
13494                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13495                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13496
13497                         if (!wakeup->packet_80211) {
13498                                 pkt_attr =
13499                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13500                                 len_attr =
13501                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13502                         }
13503
13504                         if (wakeup->packet_len &&
13505                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13506                                 goto free_msg;
13507
13508                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13509                                     wakeup->packet))
13510                                 goto free_msg;
13511                 }
13512
13513                 if (wakeup->net_detect &&
13514                     cfg80211_net_detect_results(msg, wakeup))
13515                                 goto free_msg;
13516
13517                 nla_nest_end(msg, reasons);
13518         }
13519
13520         genlmsg_end(msg, hdr);
13521
13522         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13523                                 NL80211_MCGRP_MLME, gfp);
13524         return;
13525
13526  free_msg:
13527         nlmsg_free(msg);
13528 }
13529 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13530 #endif
13531
13532 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13533                                 enum nl80211_tdls_operation oper,
13534                                 u16 reason_code, gfp_t gfp)
13535 {
13536         struct wireless_dev *wdev = dev->ieee80211_ptr;
13537         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13538         struct sk_buff *msg;
13539         void *hdr;
13540
13541         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13542                                          reason_code);
13543
13544         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13545         if (!msg)
13546                 return;
13547
13548         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13549         if (!hdr) {
13550                 nlmsg_free(msg);
13551                 return;
13552         }
13553
13554         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13555             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13556             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13557             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13558             (reason_code > 0 &&
13559              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13560                 goto nla_put_failure;
13561
13562         genlmsg_end(msg, hdr);
13563
13564         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13565                                 NL80211_MCGRP_MLME, gfp);
13566         return;
13567
13568  nla_put_failure:
13569         genlmsg_cancel(msg, hdr);
13570         nlmsg_free(msg);
13571 }
13572 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13573
13574 static int nl80211_netlink_notify(struct notifier_block * nb,
13575                                   unsigned long state,
13576                                   void *_notify)
13577 {
13578         struct netlink_notify *notify = _notify;
13579         struct cfg80211_registered_device *rdev;
13580         struct wireless_dev *wdev;
13581         struct cfg80211_beacon_registration *reg, *tmp;
13582
13583         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13584                 return NOTIFY_DONE;
13585
13586         rcu_read_lock();
13587
13588         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13589                 bool schedule_destroy_work = false;
13590                 bool schedule_scan_stop = false;
13591                 struct cfg80211_sched_scan_request *sched_scan_req =
13592                         rcu_dereference(rdev->sched_scan_req);
13593
13594                 if (sched_scan_req && notify->portid &&
13595                     sched_scan_req->owner_nlportid == notify->portid)
13596                         schedule_scan_stop = true;
13597
13598                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13599                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13600
13601                         if (wdev->owner_nlportid == notify->portid)
13602                                 schedule_destroy_work = true;
13603                 }
13604
13605                 spin_lock_bh(&rdev->beacon_registrations_lock);
13606                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13607                                          list) {
13608                         if (reg->nlportid == notify->portid) {
13609                                 list_del(&reg->list);
13610                                 kfree(reg);
13611                                 break;
13612                         }
13613                 }
13614                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13615
13616                 if (schedule_destroy_work) {
13617                         struct cfg80211_iface_destroy *destroy;
13618
13619                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13620                         if (destroy) {
13621                                 destroy->nlportid = notify->portid;
13622                                 spin_lock(&rdev->destroy_list_lock);
13623                                 list_add(&destroy->list, &rdev->destroy_list);
13624                                 spin_unlock(&rdev->destroy_list_lock);
13625                                 schedule_work(&rdev->destroy_work);
13626                         }
13627                 } else if (schedule_scan_stop) {
13628                         sched_scan_req->owner_nlportid = 0;
13629
13630                         if (rdev->ops->sched_scan_stop &&
13631                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13632                                 schedule_work(&rdev->sched_scan_stop_wk);
13633                 }
13634         }
13635
13636         rcu_read_unlock();
13637
13638         /*
13639          * It is possible that the user space process that is controlling the
13640          * indoor setting disappeared, so notify the regulatory core.
13641          */
13642         regulatory_netlink_notify(notify->portid);
13643         return NOTIFY_OK;
13644 }
13645
13646 static struct notifier_block nl80211_netlink_notifier = {
13647         .notifier_call = nl80211_netlink_notify,
13648 };
13649
13650 void cfg80211_ft_event(struct net_device *netdev,
13651                        struct cfg80211_ft_event_params *ft_event)
13652 {
13653         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13654         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13655         struct sk_buff *msg;
13656         void *hdr;
13657
13658         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13659
13660         if (!ft_event->target_ap)
13661                 return;
13662
13663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13664         if (!msg)
13665                 return;
13666
13667         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13668         if (!hdr)
13669                 goto out;
13670
13671         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13672             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13673             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13674                 goto out;
13675
13676         if (ft_event->ies &&
13677             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13678                 goto out;
13679         if (ft_event->ric_ies &&
13680             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13681                     ft_event->ric_ies))
13682                 goto out;
13683
13684         genlmsg_end(msg, hdr);
13685
13686         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13687                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13688         return;
13689  out:
13690         nlmsg_free(msg);
13691 }
13692 EXPORT_SYMBOL(cfg80211_ft_event);
13693
13694 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13695 {
13696         struct cfg80211_registered_device *rdev;
13697         struct sk_buff *msg;
13698         void *hdr;
13699         u32 nlportid;
13700
13701         rdev = wiphy_to_rdev(wdev->wiphy);
13702         if (!rdev->crit_proto_nlportid)
13703                 return;
13704
13705         nlportid = rdev->crit_proto_nlportid;
13706         rdev->crit_proto_nlportid = 0;
13707
13708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13709         if (!msg)
13710                 return;
13711
13712         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13713         if (!hdr)
13714                 goto nla_put_failure;
13715
13716         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13717             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13718                               NL80211_ATTR_PAD))
13719                 goto nla_put_failure;
13720
13721         genlmsg_end(msg, hdr);
13722
13723         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13724         return;
13725
13726  nla_put_failure:
13727         if (hdr)
13728                 genlmsg_cancel(msg, hdr);
13729         nlmsg_free(msg);
13730 }
13731 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13732
13733 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13734 {
13735         struct wiphy *wiphy = wdev->wiphy;
13736         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13737         struct sk_buff *msg;
13738         void *hdr;
13739
13740         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13741         if (!msg)
13742                 return;
13743
13744         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13745         if (!hdr)
13746                 goto out;
13747
13748         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13749             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13750             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13751                               NL80211_ATTR_PAD))
13752                 goto out;
13753
13754         genlmsg_end(msg, hdr);
13755
13756         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13757                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13758         return;
13759  out:
13760         nlmsg_free(msg);
13761 }
13762
13763 /* initialisation/exit functions */
13764
13765 int nl80211_init(void)
13766 {
13767         int err;
13768
13769         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13770                                                    nl80211_mcgrps);
13771         if (err)
13772                 return err;
13773
13774         err = netlink_register_notifier(&nl80211_netlink_notifier);
13775         if (err)
13776                 goto err_out;
13777
13778         return 0;
13779  err_out:
13780         genl_unregister_family(&nl80211_fam);
13781         return err;
13782 }
13783
13784 void nl80211_exit(void)
13785 {
13786         netlink_unregister_notifier(&nl80211_netlink_notifier);
13787         genl_unregister_family(&nl80211_fam);
13788 }