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 > 3)
 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                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 885                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 886                         err = -EINVAL;
 887                         goto error;
 888                 }
 889                 result->params[parse.idx].cipher = parse.p.cipher;
 890                 result->params[parse.idx].key_len = parse.p.key_len;
 891                 result->params[parse.idx].key = result->data[parse.idx];
 892                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 893
 894                 /* must be WEP key if we got here */
 895                 if (no_ht)
 896                         *no_ht = true;
 897         }
 898
 899         return result;
 900  error:
 901         kfree(result);
 902         return ERR_PTR(err);
 903 }
 904
 905 static int nl80211_key_allowed(struct wireless_dev *wdev)
 906 {
 907         ASSERT_WDEV_LOCK(wdev);
 908
 909         switch (wdev->iftype) {
 910         case NL80211_IFTYPE_AP:
 911         case NL80211_IFTYPE_AP_VLAN:
 912         case NL80211_IFTYPE_P2P_GO:
 913         case NL80211_IFTYPE_MESH_POINT:
 914                 break;
 915         case NL80211_IFTYPE_ADHOC:
 916         case NL80211_IFTYPE_STATION:
 917         case NL80211_IFTYPE_P2P_CLIENT:
 918                 if (!wdev->current_bss)
 919                         return -ENOLINK;
 920                 break;
 921         case NL80211_IFTYPE_UNSPECIFIED:
 922         case NL80211_IFTYPE_OCB:
 923         case NL80211_IFTYPE_MONITOR:
 924         case NL80211_IFTYPE_P2P_DEVICE:
 925         case NL80211_IFTYPE_WDS:
 926         case NUM_NL80211_IFTYPES:
 927                 return -EINVAL;
 928         }
 929
 930         return 0;
 931 }
 932
 933 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 934                                                         struct nlattr *tb)
 935 {
 936         struct ieee80211_channel *chan;
 937
 938         if (tb == NULL)
 939                 return NULL;
 940         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 941         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 942                 return NULL;
 943         return chan;
 944 }
 945
 946 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 947 {
 948         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 949         int i;
 950
 951         if (!nl_modes)
 952                 goto nla_put_failure;
 953
 954         i = 0;
 955         while (ifmodes) {
 956                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 957                         goto nla_put_failure;
 958                 ifmodes >>= 1;
 959                 i++;
 960         }
 961
 962         nla_nest_end(msg, nl_modes);
 963         return 0;
 964
 965 nla_put_failure:
 966         return -ENOBUFS;
 967 }
 968
 969 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 970                                           struct sk_buff *msg,
 971                                           bool large)
 972 {
 973         struct nlattr *nl_combis;
 974         int i, j;
 975
 976         nl_combis = nla_nest_start(msg,
 977                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 978         if (!nl_combis)
 979                 goto nla_put_failure;
 980
 981         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 982                 const struct ieee80211_iface_combination *c;
 983                 struct nlattr *nl_combi, *nl_limits;
 984
 985                 c = &wiphy->iface_combinations[i];
 986
 987                 nl_combi = nla_nest_start(msg, i + 1);
 988                 if (!nl_combi)
 989                         goto nla_put_failure;
 990
 991                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 992                 if (!nl_limits)
 993                         goto nla_put_failure;
 994
 995                 for (j = 0; j < c->n_limits; j++) {
 996                         struct nlattr *nl_limit;
 997
 998                         nl_limit = nla_nest_start(msg, j + 1);
 999                         if (!nl_limit)
1000                                 goto nla_put_failure;
1001                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1002                                         c->limits[j].max))
1003                                 goto nla_put_failure;
1004                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1005                                                 c->limits[j].types))
1006                                 goto nla_put_failure;
1007                         nla_nest_end(msg, nl_limit);
1008                 }
1009
1010                 nla_nest_end(msg, nl_limits);
1011
1012                 if (c->beacon_int_infra_match &&
1013                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1014                         goto nla_put_failure;
1015                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1016                                 c->num_different_channels) ||
1017                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1018                                 c->max_interfaces))
1019                         goto nla_put_failure;
1020                 if (large &&
1021                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1022                                 c->radar_detect_widths) ||
1023                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1024                                 c->radar_detect_regions)))
1025                         goto nla_put_failure;
1026
1027                 nla_nest_end(msg, nl_combi);
1028         }
1029
1030         nla_nest_end(msg, nl_combis);
1031
1032         return 0;
1033 nla_put_failure:
1034         return -ENOBUFS;
1035 }
1036
1037 #ifdef CONFIG_PM
1038 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1039                                         struct sk_buff *msg)
1040 {
1041         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1042         struct nlattr *nl_tcp;
1043
1044         if (!tcp)
1045                 return 0;
1046
1047         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1048         if (!nl_tcp)
1049                 return -ENOBUFS;
1050
1051         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1052                         tcp->data_payload_max))
1053                 return -ENOBUFS;
1054
1055         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1056                         tcp->data_payload_max))
1057                 return -ENOBUFS;
1058
1059         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1060                 return -ENOBUFS;
1061
1062         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1063                                 sizeof(*tcp->tok), tcp->tok))
1064                 return -ENOBUFS;
1065
1066         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1067                         tcp->data_interval_max))
1068                 return -ENOBUFS;
1069
1070         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1071                         tcp->wake_payload_max))
1072                 return -ENOBUFS;
1073
1074         nla_nest_end(msg, nl_tcp);
1075         return 0;
1076 }
1077
1078 static int nl80211_send_wowlan(struct sk_buff *msg,
1079                                struct cfg80211_registered_device *rdev,
1080                                bool large)
1081 {
1082         struct nlattr *nl_wowlan;
1083
1084         if (!rdev->wiphy.wowlan)
1085                 return 0;
1086
1087         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1088         if (!nl_wowlan)
1089                 return -ENOBUFS;
1090
1091         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1092              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1093             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1094              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1095             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1096              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1097             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1098              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1099             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1100              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1101             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1102              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1103             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1104              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1105             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1106              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1107                 return -ENOBUFS;
1108
1109         if (rdev->wiphy.wowlan->n_patterns) {
1110                 struct nl80211_pattern_support pat = {
1111                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1112                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1113                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1114                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1115                 };
1116
1117                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1118                             sizeof(pat), &pat))
1119                         return -ENOBUFS;
1120         }
1121
1122         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1123             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1124                         rdev->wiphy.wowlan->max_nd_match_sets))
1125                 return -ENOBUFS;
1126
1127         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1128                 return -ENOBUFS;
1129
1130         nla_nest_end(msg, nl_wowlan);
1131
1132         return 0;
1133 }
1134 #endif
1135
1136 static int nl80211_send_coalesce(struct sk_buff *msg,
1137                                  struct cfg80211_registered_device *rdev)
1138 {
1139         struct nl80211_coalesce_rule_support rule;
1140
1141         if (!rdev->wiphy.coalesce)
1142                 return 0;
1143
1144         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1145         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1146         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1147         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1148         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1149         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1150
1151         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1152                 return -ENOBUFS;
1153
1154         return 0;
1155 }
1156
1157 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1158                                       struct ieee80211_supported_band *sband)
1159 {
1160         struct nlattr *nl_rates, *nl_rate;
1161         struct ieee80211_rate *rate;
1162         int i;
1163
1164         /* add HT info */
1165         if (sband->ht_cap.ht_supported &&
1166             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1167                      sizeof(sband->ht_cap.mcs),
1168                      &sband->ht_cap.mcs) ||
1169              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1170                          sband->ht_cap.cap) ||
1171              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1172                         sband->ht_cap.ampdu_factor) ||
1173              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1174                         sband->ht_cap.ampdu_density)))
1175                 return -ENOBUFS;
1176
1177         /* add VHT info */
1178         if (sband->vht_cap.vht_supported &&
1179             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1180                      sizeof(sband->vht_cap.vht_mcs),
1181                      &sband->vht_cap.vht_mcs) ||
1182              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1183                          sband->vht_cap.cap)))
1184                 return -ENOBUFS;
1185
1186         /* add bitrates */
1187         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1188         if (!nl_rates)
1189                 return -ENOBUFS;
1190
1191         for (i = 0; i < sband->n_bitrates; i++) {
1192                 nl_rate = nla_nest_start(msg, i);
1193                 if (!nl_rate)
1194                         return -ENOBUFS;
1195
1196                 rate = &sband->bitrates[i];
1197                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1198                                 rate->bitrate))
1199                         return -ENOBUFS;
1200                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1201                     nla_put_flag(msg,
1202                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1203                         return -ENOBUFS;
1204
1205                 nla_nest_end(msg, nl_rate);
1206         }
1207
1208         nla_nest_end(msg, nl_rates);
1209
1210         return 0;
1211 }
1212
1213 static int
1214 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1215                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1216 {
1217         u16 stypes;
1218         struct nlattr *nl_ftypes, *nl_ifs;
1219         enum nl80211_iftype ift;
1220         int i;
1221
1222         if (!mgmt_stypes)
1223                 return 0;
1224
1225         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1226         if (!nl_ifs)
1227                 return -ENOBUFS;
1228
1229         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1230                 nl_ftypes = nla_nest_start(msg, ift);
1231                 if (!nl_ftypes)
1232                         return -ENOBUFS;
1233                 i = 0;
1234                 stypes = mgmt_stypes[ift].tx;
1235                 while (stypes) {
1236                         if ((stypes & 1) &&
1237                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1238                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1239                                 return -ENOBUFS;
1240                         stypes >>= 1;
1241                         i++;
1242                 }
1243                 nla_nest_end(msg, nl_ftypes);
1244         }
1245
1246         nla_nest_end(msg, nl_ifs);
1247
1248         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1249         if (!nl_ifs)
1250                 return -ENOBUFS;
1251
1252         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1253                 nl_ftypes = nla_nest_start(msg, ift);
1254                 if (!nl_ftypes)
1255                         return -ENOBUFS;
1256                 i = 0;
1257                 stypes = mgmt_stypes[ift].rx;
1258                 while (stypes) {
1259                         if ((stypes & 1) &&
1260                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1261                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1262                                 return -ENOBUFS;
1263                         stypes >>= 1;
1264                         i++;
1265                 }
1266                 nla_nest_end(msg, nl_ftypes);
1267         }
1268         nla_nest_end(msg, nl_ifs);
1269
1270         return 0;
1271 }
1272
1273 struct nl80211_dump_wiphy_state {
1274         s64 filter_wiphy;
1275         long start;
1276         long split_start, band_start, chan_start, capa_start;
1277         bool split;
1278 };
1279
1280 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1281                               enum nl80211_commands cmd,
1282                               struct sk_buff *msg, u32 portid, u32 seq,
1283                               int flags, struct nl80211_dump_wiphy_state *state)
1284 {
1285         void *hdr;
1286         struct nlattr *nl_bands, *nl_band;
1287         struct nlattr *nl_freqs, *nl_freq;
1288         struct nlattr *nl_cmds;
1289         enum nl80211_band band;
1290         struct ieee80211_channel *chan;
1291         int i;
1292         const struct ieee80211_txrx_stypes *mgmt_stypes =
1293                                 rdev->wiphy.mgmt_stypes;
1294         u32 features;
1295
1296         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1297         if (!hdr)
1298                 return -ENOBUFS;
1299
1300         if (WARN_ON(!state))
1301                 return -EINVAL;
1302
1303         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1304             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1305                            wiphy_name(&rdev->wiphy)) ||
1306             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1307                         cfg80211_rdev_list_generation))
1308                 goto nla_put_failure;
1309
1310         if (cmd != NL80211_CMD_NEW_WIPHY)
1311                 goto finish;
1312
1313         switch (state->split_start) {
1314         case 0:
1315                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1316                                rdev->wiphy.retry_short) ||
1317                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1318                                rdev->wiphy.retry_long) ||
1319                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1320                                 rdev->wiphy.frag_threshold) ||
1321                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1322                                 rdev->wiphy.rts_threshold) ||
1323                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1324                                rdev->wiphy.coverage_class) ||
1325                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1326                                rdev->wiphy.max_scan_ssids) ||
1327                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1328                                rdev->wiphy.max_sched_scan_ssids) ||
1329                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1330                                 rdev->wiphy.max_scan_ie_len) ||
1331                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1332                                 rdev->wiphy.max_sched_scan_ie_len) ||
1333                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1334                                rdev->wiphy.max_match_sets) ||
1335                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1336                                 rdev->wiphy.max_sched_scan_plans) ||
1337                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1338                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1339                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1340                                 rdev->wiphy.max_sched_scan_plan_iterations))
1341                         goto nla_put_failure;
1342
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1344                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1345                         goto nla_put_failure;
1346                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1347                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1348                         goto nla_put_failure;
1349                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1350                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1351                         goto nla_put_failure;
1352                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1353                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1354                         goto nla_put_failure;
1355                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1356                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1357                         goto nla_put_failure;
1358                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1359                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1360                         goto nla_put_failure;
1361                 state->split_start++;
1362                 if (state->split)
1363                         break;
1364         case 1:
1365                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1366                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1367                             rdev->wiphy.cipher_suites))
1368                         goto nla_put_failure;
1369
1370                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1371                                rdev->wiphy.max_num_pmkids))
1372                         goto nla_put_failure;
1373
1374                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1375                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1376                         goto nla_put_failure;
1377
1378                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1379                                 rdev->wiphy.available_antennas_tx) ||
1380                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1381                                 rdev->wiphy.available_antennas_rx))
1382                         goto nla_put_failure;
1383
1384                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1385                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1386                                 rdev->wiphy.probe_resp_offload))
1387                         goto nla_put_failure;
1388
1389                 if ((rdev->wiphy.available_antennas_tx ||
1390                      rdev->wiphy.available_antennas_rx) &&
1391                     rdev->ops->get_antenna) {
1392                         u32 tx_ant = 0, rx_ant = 0;
1393                         int res;
1394
1395                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1396                         if (!res) {
1397                                 if (nla_put_u32(msg,
1398                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1399                                                 tx_ant) ||
1400                                     nla_put_u32(msg,
1401                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1402                                                 rx_ant))
1403                                         goto nla_put_failure;
1404                         }
1405                 }
1406
1407                 state->split_start++;
1408                 if (state->split)
1409                         break;
1410         case 2:
1411                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1412                                         rdev->wiphy.interface_modes))
1413                                 goto nla_put_failure;
1414                 state->split_start++;
1415                 if (state->split)
1416                         break;
1417         case 3:
1418                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1419                 if (!nl_bands)
1420                         goto nla_put_failure;
1421
1422                 for (band = state->band_start;
1423                      band < NUM_NL80211_BANDS; band++) {
1424                         struct ieee80211_supported_band *sband;
1425
1426                         sband = rdev->wiphy.bands[band];
1427
1428                         if (!sband)
1429                                 continue;
1430
1431                         nl_band = nla_nest_start(msg, band);
1432                         if (!nl_band)
1433                                 goto nla_put_failure;
1434
1435                         switch (state->chan_start) {
1436                         case 0:
1437                                 if (nl80211_send_band_rateinfo(msg, sband))
1438                                         goto nla_put_failure;
1439                                 state->chan_start++;
1440                                 if (state->split)
1441                                         break;
1442                         default:
1443                                 /* add frequencies */
1444                                 nl_freqs = nla_nest_start(
1445                                         msg, NL80211_BAND_ATTR_FREQS);
1446                                 if (!nl_freqs)
1447                                         goto nla_put_failure;
1448
1449                                 for (i = state->chan_start - 1;
1450                                      i < sband->n_channels;
1451                                      i++) {
1452                                         nl_freq = nla_nest_start(msg, i);
1453                                         if (!nl_freq)
1454                                                 goto nla_put_failure;
1455
1456                                         chan = &sband->channels[i];
1457
1458                                         if (nl80211_msg_put_channel(
1459                                                         msg, chan,
1460                                                         state->split))
1461                                                 goto nla_put_failure;
1462
1463                                         nla_nest_end(msg, nl_freq);
1464                                         if (state->split)
1465                                                 break;
1466                                 }
1467                                 if (i < sband->n_channels)
1468                                         state->chan_start = i + 2;
1469                                 else
1470                                         state->chan_start = 0;
1471                                 nla_nest_end(msg, nl_freqs);
1472                         }
1473
1474                         nla_nest_end(msg, nl_band);
1475
1476                         if (state->split) {
1477                                 /* start again here */
1478                                 if (state->chan_start)
1479                                         band--;
1480                                 break;
1481                         }
1482                 }
1483                 nla_nest_end(msg, nl_bands);
1484
1485                 if (band < NUM_NL80211_BANDS)
1486                         state->band_start = band + 1;
1487                 else
1488                         state->band_start = 0;
1489
1490                 /* if bands & channels are done, continue outside */
1491                 if (state->band_start == 0 && state->chan_start == 0)
1492                         state->split_start++;
1493                 if (state->split)
1494                         break;
1495         case 4:
1496                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1497                 if (!nl_cmds)
1498                         goto nla_put_failure;
1499
1500                 i = 0;
1501 #define CMD(op, n)                                                      \
1502                  do {                                                   \
1503                         if (rdev->ops->op) {                            \
1504                                 i++;                                    \
1505                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1506                                         goto nla_put_failure;           \
1507                         }                                               \
1508                 } while (0)
1509
1510                 CMD(add_virtual_intf, NEW_INTERFACE);
1511                 CMD(change_virtual_intf, SET_INTERFACE);
1512                 CMD(add_key, NEW_KEY);
1513                 CMD(start_ap, START_AP);
1514                 CMD(add_station, NEW_STATION);
1515                 CMD(add_mpath, NEW_MPATH);
1516                 CMD(update_mesh_config, SET_MESH_CONFIG);
1517                 CMD(change_bss, SET_BSS);
1518                 CMD(auth, AUTHENTICATE);
1519                 CMD(assoc, ASSOCIATE);
1520                 CMD(deauth, DEAUTHENTICATE);
1521                 CMD(disassoc, DISASSOCIATE);
1522                 CMD(join_ibss, JOIN_IBSS);
1523                 CMD(join_mesh, JOIN_MESH);
1524                 CMD(set_pmksa, SET_PMKSA);
1525                 CMD(del_pmksa, DEL_PMKSA);
1526                 CMD(flush_pmksa, FLUSH_PMKSA);
1527                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1528                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1529                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1530                 CMD(mgmt_tx, FRAME);
1531                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1532                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1533                         i++;
1534                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1535                                 goto nla_put_failure;
1536                 }
1537                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1538                     rdev->ops->join_mesh) {
1539                         i++;
1540                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1541                                 goto nla_put_failure;
1542                 }
1543                 CMD(set_wds_peer, SET_WDS_PEER);
1544                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1545                         CMD(tdls_mgmt, TDLS_MGMT);
1546                         CMD(tdls_oper, TDLS_OPER);
1547                 }
1548                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1549                         CMD(sched_scan_start, START_SCHED_SCAN);
1550                 CMD(probe_client, PROBE_CLIENT);
1551                 CMD(set_noack_map, SET_NOACK_MAP);
1552                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1553                         i++;
1554                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1555                                 goto nla_put_failure;
1556                 }
1557                 CMD(start_p2p_device, START_P2P_DEVICE);
1558                 CMD(set_mcast_rate, SET_MCAST_RATE);
1559 #ifdef CONFIG_NL80211_TESTMODE
1560                 CMD(testmode_cmd, TESTMODE);
1561 #endif
1562                 if (state->split) {
1563                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1564                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1565                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1566                                 CMD(channel_switch, CHANNEL_SWITCH);
1567                         CMD(set_qos_map, SET_QOS_MAP);
1568                         if (rdev->wiphy.features &
1569                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1570                                 CMD(add_tx_ts, ADD_TX_TS);
1571                 }
1572                 /* add into the if now */
1573 #undef CMD
1574
1575                 if (rdev->ops->connect || rdev->ops->auth) {
1576                         i++;
1577                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1578                                 goto nla_put_failure;
1579                 }
1580
1581                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1582                         i++;
1583                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1584                                 goto nla_put_failure;
1585                 }
1586
1587                 nla_nest_end(msg, nl_cmds);
1588                 state->split_start++;
1589                 if (state->split)
1590                         break;
1591         case 5:
1592                 if (rdev->ops->remain_on_channel &&
1593                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1594                     nla_put_u32(msg,
1595                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1596                                 rdev->wiphy.max_remain_on_channel_duration))
1597                         goto nla_put_failure;
1598
1599                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1600                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1601                         goto nla_put_failure;
1602
1603                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1604                         goto nla_put_failure;
1605                 state->split_start++;
1606                 if (state->split)
1607                         break;
1608         case 6:
1609 #ifdef CONFIG_PM
1610                 if (nl80211_send_wowlan(msg, rdev, state->split))
1611                         goto nla_put_failure;
1612                 state->split_start++;
1613                 if (state->split)
1614                         break;
1615 #else
1616                 state->split_start++;
1617 #endif
1618         case 7:
1619                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1620                                         rdev->wiphy.software_iftypes))
1621                         goto nla_put_failure;
1622
1623                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1624                                                    state->split))
1625                         goto nla_put_failure;
1626
1627                 state->split_start++;
1628                 if (state->split)
1629                         break;
1630         case 8:
1631                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1632                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1633                                 rdev->wiphy.ap_sme_capa))
1634                         goto nla_put_failure;
1635
1636                 features = rdev->wiphy.features;
1637                 /*
1638                  * We can only add the per-channel limit information if the
1639                  * dump is split, otherwise it makes it too big. Therefore
1640                  * only advertise it in that case.
1641                  */
1642                 if (state->split)
1643                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1644                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1645                         goto nla_put_failure;
1646
1647                 if (rdev->wiphy.ht_capa_mod_mask &&
1648                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1649                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1650                             rdev->wiphy.ht_capa_mod_mask))
1651                         goto nla_put_failure;
1652
1653                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1654                     rdev->wiphy.max_acl_mac_addrs &&
1655                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1656                                 rdev->wiphy.max_acl_mac_addrs))
1657                         goto nla_put_failure;
1658
1659                 /*
1660                  * Any information below this point is only available to
1661                  * applications that can deal with it being split. This
1662                  * helps ensure that newly added capabilities don't break
1663                  * older tools by overrunning their buffers.
1664                  *
1665                  * We still increment split_start so that in the split
1666                  * case we'll continue with more data in the next round,
1667                  * but break unconditionally so unsplit data stops here.
1668                  */
1669                 state->split_start++;
1670                 break;
1671         case 9:
1672                 if (rdev->wiphy.extended_capabilities &&
1673                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1674                              rdev->wiphy.extended_capabilities_len,
1675                              rdev->wiphy.extended_capabilities) ||
1676                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1677                              rdev->wiphy.extended_capabilities_len,
1678                              rdev->wiphy.extended_capabilities_mask)))
1679                         goto nla_put_failure;
1680
1681                 if (rdev->wiphy.vht_capa_mod_mask &&
1682                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1683                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1684                             rdev->wiphy.vht_capa_mod_mask))
1685                         goto nla_put_failure;
1686
1687                 state->split_start++;
1688                 break;
1689         case 10:
1690                 if (nl80211_send_coalesce(msg, rdev))
1691                         goto nla_put_failure;
1692
1693                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1694                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1695                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1696                         goto nla_put_failure;
1697
1698                 if (rdev->wiphy.max_ap_assoc_sta &&
1699                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1700                                 rdev->wiphy.max_ap_assoc_sta))
1701                         goto nla_put_failure;
1702
1703                 state->split_start++;
1704                 break;
1705         case 11:
1706                 if (rdev->wiphy.n_vendor_commands) {
1707                         const struct nl80211_vendor_cmd_info *info;
1708                         struct nlattr *nested;
1709
1710                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1711                         if (!nested)
1712                                 goto nla_put_failure;
1713
1714                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1715                                 info = &rdev->wiphy.vendor_commands[i].info;
1716                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1717                                         goto nla_put_failure;
1718                         }
1719                         nla_nest_end(msg, nested);
1720                 }
1721
1722                 if (rdev->wiphy.n_vendor_events) {
1723                         const struct nl80211_vendor_cmd_info *info;
1724                         struct nlattr *nested;
1725
1726                         nested = nla_nest_start(msg,
1727                                                 NL80211_ATTR_VENDOR_EVENTS);
1728                         if (!nested)
1729                                 goto nla_put_failure;
1730
1731                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1732                                 info = &rdev->wiphy.vendor_events[i];
1733                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1734                                         goto nla_put_failure;
1735                         }
1736                         nla_nest_end(msg, nested);
1737                 }
1738                 state->split_start++;
1739                 break;
1740         case 12:
1741                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1742                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1743                                rdev->wiphy.max_num_csa_counters))
1744                         goto nla_put_failure;
1745
1746                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1747                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1748                         goto nla_put_failure;
1749
1750                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1751                             sizeof(rdev->wiphy.ext_features),
1752                             rdev->wiphy.ext_features))
1753                         goto nla_put_failure;
1754
1755                 if (rdev->wiphy.bss_select_support) {
1756                         struct nlattr *nested;
1757                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1758
1759                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1760                         if (!nested)
1761                                 goto nla_put_failure;
1762
1763                         i = 0;
1764                         while (bss_select_support) {
1765                                 if ((bss_select_support & 1) &&
1766                                     nla_put_flag(msg, i))
1767                                         goto nla_put_failure;
1768                                 i++;
1769                                 bss_select_support >>= 1;
1770                         }
1771                         nla_nest_end(msg, nested);
1772                 }
1773
1774                 state->split_start++;
1775                 break;
1776         case 13:
1777                 if (rdev->wiphy.num_iftype_ext_capab &&
1778                     rdev->wiphy.iftype_ext_capab) {
1779                         struct nlattr *nested_ext_capab, *nested;
1780
1781                         nested = nla_nest_start(msg,
1782                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1783                         if (!nested)
1784                                 goto nla_put_failure;
1785
1786                         for (i = state->capa_start;
1787                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1788                                 const struct wiphy_iftype_ext_capab *capab;
1789
1790                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1791
1792                                 nested_ext_capab = nla_nest_start(msg, i);
1793                                 if (!nested_ext_capab ||
1794                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1795                                                 capab->iftype) ||
1796                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1797                                             capab->extended_capabilities_len,
1798                                             capab->extended_capabilities) ||
1799                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1800                                             capab->extended_capabilities_len,
1801                                             capab->extended_capabilities_mask))
1802                                         goto nla_put_failure;
1803
1804                                 nla_nest_end(msg, nested_ext_capab);
1805                                 if (state->split)
1806                                         break;
1807                         }
1808                         nla_nest_end(msg, nested);
1809                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1810                                 state->capa_start = i + 1;
1811                                 break;
1812                         }
1813                 }
1814
1815                 /* done */
1816                 state->split_start = 0;
1817                 break;
1818         }
1819  finish:
1820         genlmsg_end(msg, hdr);
1821         return 0;
1822
1823  nla_put_failure:
1824         genlmsg_cancel(msg, hdr);
1825         return -EMSGSIZE;
1826 }
1827
1828 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1829                                     struct netlink_callback *cb,
1830                                     struct nl80211_dump_wiphy_state *state)
1831 {
1832         struct nlattr **tb = nl80211_fam.attrbuf;
1833         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1834                               tb, nl80211_fam.maxattr, nl80211_policy);
1835         /* ignore parse errors for backward compatibility */
1836         if (ret)
1837                 return 0;
1838
1839         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1840         if (tb[NL80211_ATTR_WIPHY])
1841                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1842         if (tb[NL80211_ATTR_WDEV])
1843                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1844         if (tb[NL80211_ATTR_IFINDEX]) {
1845                 struct net_device *netdev;
1846                 struct cfg80211_registered_device *rdev;
1847                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1848
1849                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1850                 if (!netdev)
1851                         return -ENODEV;
1852                 if (netdev->ieee80211_ptr) {
1853                         rdev = wiphy_to_rdev(
1854                                 netdev->ieee80211_ptr->wiphy);
1855                         state->filter_wiphy = rdev->wiphy_idx;
1856                 }
1857         }
1858
1859         return 0;
1860 }
1861
1862 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1863 {
1864         int idx = 0, ret;
1865         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1866         struct cfg80211_registered_device *rdev;
1867
1868         rtnl_lock();
1869         if (!state) {
1870                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1871                 if (!state) {
1872                         rtnl_unlock();
1873                         return -ENOMEM;
1874                 }
1875                 state->filter_wiphy = -1;
1876                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1877                 if (ret) {
1878                         kfree(state);
1879                         rtnl_unlock();
1880                         return ret;
1881                 }
1882                 cb->args[0] = (long)state;
1883         }
1884
1885         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1886                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1887                         continue;
1888                 if (++idx <= state->start)
1889                         continue;
1890                 if (state->filter_wiphy != -1 &&
1891                     state->filter_wiphy != rdev->wiphy_idx)
1892                         continue;
1893                 /* attempt to fit multiple wiphy data chunks into the skb */
1894                 do {
1895                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1896                                                  skb,
1897                                                  NETLINK_CB(cb->skb).portid,
1898                                                  cb->nlh->nlmsg_seq,
1899                                                  NLM_F_MULTI, state);
1900                         if (ret < 0) {
1901                                 /*
1902                                  * If sending the wiphy data didn't fit (ENOBUFS
1903                                  * or EMSGSIZE returned), this SKB is still
1904                                  * empty (so it's not too big because another
1905                                  * wiphy dataset is already in the skb) and
1906                                  * we've not tried to adjust the dump allocation
1907                                  * yet ... then adjust the alloc size to be
1908                                  * bigger, and return 1 but with the empty skb.
1909                                  * This results in an empty message being RX'ed
1910                                  * in userspace, but that is ignored.
1911                                  *
1912                                  * We can then retry with the larger buffer.
1913                                  */
1914                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1915                                     !skb->len && !state->split &&
1916                                     cb->min_dump_alloc < 4096) {
1917                                         cb->min_dump_alloc = 4096;
1918                                         state->split_start = 0;
1919                                         rtnl_unlock();
1920                                         return 1;
1921                                 }
1922                                 idx--;
1923                                 break;
1924                         }
1925                 } while (state->split_start > 0);
1926                 break;
1927         }
1928         rtnl_unlock();
1929
1930         state->start = idx;
1931
1932         return skb->len;
1933 }
1934
1935 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1936 {
1937         kfree((void *)cb->args[0]);
1938         return 0;
1939 }
1940
1941 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1942 {
1943         struct sk_buff *msg;
1944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1945         struct nl80211_dump_wiphy_state state = {};
1946
1947         msg = nlmsg_new(4096, GFP_KERNEL);
1948         if (!msg)
1949                 return -ENOMEM;
1950
1951         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1952                                info->snd_portid, info->snd_seq, 0,
1953                                &state) < 0) {
1954                 nlmsg_free(msg);
1955                 return -ENOBUFS;
1956         }
1957
1958         return genlmsg_reply(msg, info);
1959 }
1960
1961 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1962         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1963         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1964         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1965         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1966         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1967 };
1968
1969 static int parse_txq_params(struct nlattr *tb[],
1970                             struct ieee80211_txq_params *txq_params)
1971 {
1972         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1973             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1974             !tb[NL80211_TXQ_ATTR_AIFS])
1975                 return -EINVAL;
1976
1977         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1978         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1979         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1980         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1981         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1982
1983         if (txq_params->ac >= NL80211_NUM_ACS)
1984                 return -EINVAL;
1985
1986         return 0;
1987 }
1988
1989 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1990 {
1991         /*
1992          * You can only set the channel explicitly for WDS interfaces,
1993          * all others have their channel managed via their respective
1994          * "establish a connection" command (connect, join, ...)
1995          *
1996          * For AP/GO and mesh mode, the channel can be set with the
1997          * channel userspace API, but is only stored and passed to the
1998          * low-level driver when the AP starts or the mesh is joined.
1999          * This is for backward compatibility, userspace can also give
2000          * the channel in the start-ap or join-mesh commands instead.
2001          *
2002          * Monitors are special as they are normally slaved to
2003          * whatever else is going on, so they have their own special
2004          * operation to set the monitor channel if possible.
2005          */
2006         return !wdev ||
2007                 wdev->iftype == NL80211_IFTYPE_AP ||
2008                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2009                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2010                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2011 }
2012
2013 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2014                                  struct genl_info *info,
2015                                  struct cfg80211_chan_def *chandef)
2016 {
2017         u32 control_freq;
2018
2019         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2020                 return -EINVAL;
2021
2022         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2023
2024         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2025         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2026         chandef->center_freq1 = control_freq;
2027         chandef->center_freq2 = 0;
2028
2029         /* Primary channel not allowed */
2030         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2031                 return -EINVAL;
2032
2033         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2034                 enum nl80211_channel_type chantype;
2035
2036                 chantype = nla_get_u32(
2037                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2038
2039                 switch (chantype) {
2040                 case NL80211_CHAN_NO_HT:
2041                 case NL80211_CHAN_HT20:
2042                 case NL80211_CHAN_HT40PLUS:
2043                 case NL80211_CHAN_HT40MINUS:
2044                         cfg80211_chandef_create(chandef, chandef->chan,
2045                                                 chantype);
2046                         break;
2047                 default:
2048                         return -EINVAL;
2049                 }
2050         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2051                 chandef->width =
2052                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2053                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2054                         chandef->center_freq1 =
2055                                 nla_get_u32(
2056                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2057                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2058                         chandef->center_freq2 =
2059                                 nla_get_u32(
2060                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2061         }
2062
2063         if (!cfg80211_chandef_valid(chandef))
2064                 return -EINVAL;
2065
2066         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2067                                      IEEE80211_CHAN_DISABLED))
2068                 return -EINVAL;
2069
2070         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2071              chandef->width == NL80211_CHAN_WIDTH_10) &&
2072             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2073                 return -EINVAL;
2074
2075         return 0;
2076 }
2077
2078 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2079                                  struct net_device *dev,
2080                                  struct genl_info *info)
2081 {
2082         struct cfg80211_chan_def chandef;
2083         int result;
2084         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2085         struct wireless_dev *wdev = NULL;
2086
2087         if (dev)
2088                 wdev = dev->ieee80211_ptr;
2089         if (!nl80211_can_set_dev_channel(wdev))
2090                 return -EOPNOTSUPP;
2091         if (wdev)
2092                 iftype = wdev->iftype;
2093
2094         result = nl80211_parse_chandef(rdev, info, &chandef);
2095         if (result)
2096                 return result;
2097
2098         switch (iftype) {
2099         case NL80211_IFTYPE_AP:
2100         case NL80211_IFTYPE_P2P_GO:
2101                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2102                                                    iftype)) {
2103                         result = -EINVAL;
2104                         break;
2105                 }
2106                 if (wdev->beacon_interval) {
2107                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2108                             !(rdev->wiphy.features &
2109                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2110                                 result = -EBUSY;
2111                                 break;
2112                         }
2113
2114                         /* Only allow dynamic channel width changes */
2115                         if (chandef.chan != wdev->preset_chandef.chan) {
2116                                 result = -EBUSY;
2117                                 break;
2118                         }
2119                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2120                         if (result)
2121                                 break;
2122                 }
2123                 wdev->preset_chandef = chandef;
2124                 result = 0;
2125                 break;
2126         case NL80211_IFTYPE_MESH_POINT:
2127                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2128                 break;
2129         case NL80211_IFTYPE_MONITOR:
2130                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2131                 break;
2132         default:
2133                 result = -EINVAL;
2134         }
2135
2136         return result;
2137 }
2138
2139 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2140 {
2141         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2142         struct net_device *netdev = info->user_ptr[1];
2143
2144         return __nl80211_set_channel(rdev, netdev, info);
2145 }
2146
2147 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2148 {
2149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2150         struct net_device *dev = info->user_ptr[1];
2151         struct wireless_dev *wdev = dev->ieee80211_ptr;
2152         const u8 *bssid;
2153
2154         if (!info->attrs[NL80211_ATTR_MAC])
2155                 return -EINVAL;
2156
2157         if (netif_running(dev))
2158                 return -EBUSY;
2159
2160         if (!rdev->ops->set_wds_peer)
2161                 return -EOPNOTSUPP;
2162
2163         if (wdev->iftype != NL80211_IFTYPE_WDS)
2164                 return -EOPNOTSUPP;
2165
2166         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2167         return rdev_set_wds_peer(rdev, dev, bssid);
2168 }
2169
2170 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2171 {
2172         struct cfg80211_registered_device *rdev;
2173         struct net_device *netdev = NULL;
2174         struct wireless_dev *wdev;
2175         int result = 0, rem_txq_params = 0;
2176         struct nlattr *nl_txq_params;
2177         u32 changed;
2178         u8 retry_short = 0, retry_long = 0;
2179         u32 frag_threshold = 0, rts_threshold = 0;
2180         u8 coverage_class = 0;
2181
2182         ASSERT_RTNL();
2183
2184         /*
2185          * Try to find the wiphy and netdev. Normally this
2186          * function shouldn't need the netdev, but this is
2187          * done for backward compatibility -- previously
2188          * setting the channel was done per wiphy, but now
2189          * it is per netdev. Previous userland like hostapd
2190          * also passed a netdev to set_wiphy, so that it is
2191          * possible to let that go to the right netdev!
2192          */
2193
2194         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2195                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2196
2197                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2198                 if (netdev && netdev->ieee80211_ptr)
2199                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2200                 else
2201                         netdev = NULL;
2202         }
2203
2204         if (!netdev) {
2205                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2206                                                   info->attrs);
2207                 if (IS_ERR(rdev))
2208                         return PTR_ERR(rdev);
2209                 wdev = NULL;
2210                 netdev = NULL;
2211                 result = 0;
2212         } else
2213                 wdev = netdev->ieee80211_ptr;
2214
2215         /*
2216          * end workaround code, by now the rdev is available
2217          * and locked, and wdev may or may not be NULL.
2218          */
2219
2220         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2221                 result = cfg80211_dev_rename(
2222                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2223
2224         if (result)
2225                 return result;
2226
2227         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2228                 struct ieee80211_txq_params txq_params;
2229                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2230
2231                 if (!rdev->ops->set_txq_params)
2232                         return -EOPNOTSUPP;
2233
2234                 if (!netdev)
2235                         return -EINVAL;
2236
2237                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2238                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2239                         return -EINVAL;
2240
2241                 if (!netif_running(netdev))
2242                         return -ENETDOWN;
2243
2244                 nla_for_each_nested(nl_txq_params,
2245                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2246                                     rem_txq_params) {
2247                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2248                                            nla_data(nl_txq_params),
2249                                            nla_len(nl_txq_params),
2250                                            txq_params_policy);
2251                         if (result)
2252                                 return result;
2253                         result = parse_txq_params(tb, &txq_params);
2254                         if (result)
2255                                 return result;
2256
2257                         result = rdev_set_txq_params(rdev, netdev,
2258                                                      &txq_params);
2259                         if (result)
2260                                 return result;
2261                 }
2262         }
2263
2264         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2265                 result = __nl80211_set_channel(
2266                         rdev,
2267                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2268                         info);
2269                 if (result)
2270                         return result;
2271         }
2272
2273         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2274                 struct wireless_dev *txp_wdev = wdev;
2275                 enum nl80211_tx_power_setting type;
2276                 int idx, mbm = 0;
2277
2278                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2279                         txp_wdev = NULL;
2280
2281                 if (!rdev->ops->set_tx_power)
2282                         return -EOPNOTSUPP;
2283
2284                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2285                 type = nla_get_u32(info->attrs[idx]);
2286
2287                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2288                     (type != NL80211_TX_POWER_AUTOMATIC))
2289                         return -EINVAL;
2290
2291                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2292                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2293                         mbm = nla_get_u32(info->attrs[idx]);
2294                 }
2295
2296                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2297                 if (result)
2298                         return result;
2299         }
2300
2301         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2302             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2303                 u32 tx_ant, rx_ant;
2304
2305                 if ((!rdev->wiphy.available_antennas_tx &&
2306                      !rdev->wiphy.available_antennas_rx) ||
2307                     !rdev->ops->set_antenna)
2308                         return -EOPNOTSUPP;
2309
2310                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2311                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2312
2313                 /* reject antenna configurations which don't match the
2314                  * available antenna masks, except for the "all" mask */
2315                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2316                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2317                         return -EINVAL;
2318
2319                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2320                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2321
2322                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2323                 if (result)
2324                         return result;
2325         }
2326
2327         changed = 0;
2328
2329         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2330                 retry_short = nla_get_u8(
2331                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2332                 if (retry_short == 0)
2333                         return -EINVAL;
2334
2335                 changed |= WIPHY_PARAM_RETRY_SHORT;
2336         }
2337
2338         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2339                 retry_long = nla_get_u8(
2340                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2341                 if (retry_long == 0)
2342                         return -EINVAL;
2343
2344                 changed |= WIPHY_PARAM_RETRY_LONG;
2345         }
2346
2347         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2348                 frag_threshold = nla_get_u32(
2349                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2350                 if (frag_threshold < 256)
2351                         return -EINVAL;
2352
2353                 if (frag_threshold != (u32) -1) {
2354                         /*
2355                          * Fragments (apart from the last one) are required to
2356                          * have even length. Make the fragmentation code
2357                          * simpler by stripping LSB should someone try to use
2358                          * odd threshold value.
2359                          */
2360                         frag_threshold &= ~0x1;
2361                 }
2362                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2363         }
2364
2365         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2366                 rts_threshold = nla_get_u32(
2367                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2368                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2369         }
2370
2371         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2372                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2373                         return -EINVAL;
2374
2375                 coverage_class = nla_get_u8(
2376                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2377                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2378         }
2379
2380         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2381                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2382                         return -EOPNOTSUPP;
2383
2384                 changed |= WIPHY_PARAM_DYN_ACK;
2385         }
2386
2387         if (changed) {
2388                 u8 old_retry_short, old_retry_long;
2389                 u32 old_frag_threshold, old_rts_threshold;
2390                 u8 old_coverage_class;
2391
2392                 if (!rdev->ops->set_wiphy_params)
2393                         return -EOPNOTSUPP;
2394
2395                 old_retry_short = rdev->wiphy.retry_short;
2396                 old_retry_long = rdev->wiphy.retry_long;
2397                 old_frag_threshold = rdev->wiphy.frag_threshold;
2398                 old_rts_threshold = rdev->wiphy.rts_threshold;
2399                 old_coverage_class = rdev->wiphy.coverage_class;
2400
2401                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2402                         rdev->wiphy.retry_short = retry_short;
2403                 if (changed & WIPHY_PARAM_RETRY_LONG)
2404                         rdev->wiphy.retry_long = retry_long;
2405                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2406                         rdev->wiphy.frag_threshold = frag_threshold;
2407                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2408                         rdev->wiphy.rts_threshold = rts_threshold;
2409                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2410                         rdev->wiphy.coverage_class = coverage_class;
2411
2412                 result = rdev_set_wiphy_params(rdev, changed);
2413                 if (result) {
2414                         rdev->wiphy.retry_short = old_retry_short;
2415                         rdev->wiphy.retry_long = old_retry_long;
2416                         rdev->wiphy.frag_threshold = old_frag_threshold;
2417                         rdev->wiphy.rts_threshold = old_rts_threshold;
2418                         rdev->wiphy.coverage_class = old_coverage_class;
2419                         return result;
2420                 }
2421         }
2422         return 0;
2423 }
2424
2425 static inline u64 wdev_id(struct wireless_dev *wdev)
2426 {
2427         return (u64)wdev->identifier |
2428                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2429 }
2430
2431 static int nl80211_send_chandef(struct sk_buff *msg,
2432                                 const struct cfg80211_chan_def *chandef)
2433 {
2434         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2435                 return -EINVAL;
2436
2437         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2438                         chandef->chan->center_freq))
2439                 return -ENOBUFS;
2440         switch (chandef->width) {
2441         case NL80211_CHAN_WIDTH_20_NOHT:
2442         case NL80211_CHAN_WIDTH_20:
2443         case NL80211_CHAN_WIDTH_40:
2444                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2445                                 cfg80211_get_chandef_type(chandef)))
2446                         return -ENOBUFS;
2447                 break;
2448         default:
2449                 break;
2450         }
2451         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2452                 return -ENOBUFS;
2453         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2454                 return -ENOBUFS;
2455         if (chandef->center_freq2 &&
2456             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2457                 return -ENOBUFS;
2458         return 0;
2459 }
2460
2461 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2462                               struct cfg80211_registered_device *rdev,
2463                               struct wireless_dev *wdev, bool removal)
2464 {
2465         struct net_device *dev = wdev->netdev;
2466         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2467         void *hdr;
2468
2469         if (removal)
2470                 cmd = NL80211_CMD_DEL_INTERFACE;
2471
2472         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2473         if (!hdr)
2474                 return -1;
2475
2476         if (dev &&
2477             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2478              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2479                 goto nla_put_failure;
2480
2481         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2482             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2483             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2484                               NL80211_ATTR_PAD) ||
2485             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2486             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2487                         rdev->devlist_generation ^
2488                         (cfg80211_rdev_list_generation << 2)))
2489                 goto nla_put_failure;
2490
2491         if (rdev->ops->get_channel) {
2492                 int ret;
2493                 struct cfg80211_chan_def chandef;
2494
2495                 ret = rdev_get_channel(rdev, wdev, &chandef);
2496                 if (ret == 0) {
2497                         if (nl80211_send_chandef(msg, &chandef))
2498                                 goto nla_put_failure;
2499                 }
2500         }
2501
2502         if (rdev->ops->get_tx_power) {
2503                 int dbm, ret;
2504
2505                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2506                 if (ret == 0 &&
2507                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2508                                 DBM_TO_MBM(dbm)))
2509                         goto nla_put_failure;
2510         }
2511
2512         if (wdev->ssid_len) {
2513                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2514                         goto nla_put_failure;
2515         }
2516
2517         genlmsg_end(msg, hdr);
2518         return 0;
2519
2520  nla_put_failure:
2521         genlmsg_cancel(msg, hdr);
2522         return -EMSGSIZE;
2523 }
2524
2525 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2526 {
2527         int wp_idx = 0;
2528         int if_idx = 0;
2529         int wp_start = cb->args[0];
2530         int if_start = cb->args[1];
2531         int filter_wiphy = -1;
2532         struct cfg80211_registered_device *rdev;
2533         struct wireless_dev *wdev;
2534
2535         rtnl_lock();
2536         if (!cb->args[2]) {
2537                 struct nl80211_dump_wiphy_state state = {
2538                         .filter_wiphy = -1,
2539                 };
2540                 int ret;
2541
2542                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2543                 if (ret)
2544                         return ret;
2545
2546                 filter_wiphy = state.filter_wiphy;
2547
2548                 /*
2549                  * if filtering, set cb->args[2] to +1 since 0 is the default
2550                  * value needed to determine that parsing is necessary.
2551                  */
2552                 if (filter_wiphy >= 0)
2553                         cb->args[2] = filter_wiphy + 1;
2554                 else
2555                         cb->args[2] = -1;
2556         } else if (cb->args[2] > 0) {
2557                 filter_wiphy = cb->args[2] - 1;
2558         }
2559
2560         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2561                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2562                         continue;
2563                 if (wp_idx < wp_start) {
2564                         wp_idx++;
2565                         continue;
2566                 }
2567
2568                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2569                         continue;
2570
2571                 if_idx = 0;
2572
2573                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2574                         if (if_idx < if_start) {
2575                                 if_idx++;
2576                                 continue;
2577                         }
2578                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2579                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2580                                                rdev, wdev, false) < 0) {
2581                                 goto out;
2582                         }
2583                         if_idx++;
2584                 }
2585
2586                 wp_idx++;
2587         }
2588  out:
2589         rtnl_unlock();
2590
2591         cb->args[0] = wp_idx;
2592         cb->args[1] = if_idx;
2593
2594         return skb->len;
2595 }
2596
2597 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2598 {
2599         struct sk_buff *msg;
2600         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2601         struct wireless_dev *wdev = info->user_ptr[1];
2602
2603         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2604         if (!msg)
2605                 return -ENOMEM;
2606
2607         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2608                                rdev, wdev, false) < 0) {
2609                 nlmsg_free(msg);
2610                 return -ENOBUFS;
2611         }
2612
2613         return genlmsg_reply(msg, info);
2614 }
2615
2616 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2617         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2618         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2619         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2620         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2621         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2622         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2623 };
2624
2625 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2626 {
2627         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2628         int flag;
2629
2630         *mntrflags = 0;
2631
2632         if (!nla)
2633                 return -EINVAL;
2634
2635         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2636                              nla, mntr_flags_policy))
2637                 return -EINVAL;
2638
2639         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2640                 if (flags[flag])
2641                         *mntrflags |= (1<<flag);
2642
2643         return 0;
2644 }
2645
2646 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2647                                struct net_device *netdev, u8 use_4addr,
2648                                enum nl80211_iftype iftype)
2649 {
2650         if (!use_4addr) {
2651                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2652                         return -EBUSY;
2653                 return 0;
2654         }
2655
2656         switch (iftype) {
2657         case NL80211_IFTYPE_AP_VLAN:
2658                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2659                         return 0;
2660                 break;
2661         case NL80211_IFTYPE_STATION:
2662                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2663                         return 0;
2664                 break;
2665         default:
2666                 break;
2667         }
2668
2669         return -EOPNOTSUPP;
2670 }
2671
2672 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2673 {
2674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2675         struct vif_params params;
2676         int err;
2677         enum nl80211_iftype otype, ntype;
2678         struct net_device *dev = info->user_ptr[1];
2679         u32 _flags, *flags = NULL;
2680         bool change = false;
2681
2682         memset(&params, 0, sizeof(params));
2683
2684         otype = ntype = dev->ieee80211_ptr->iftype;
2685
2686         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2687                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2688                 if (otype != ntype)
2689                         change = true;
2690                 if (ntype > NL80211_IFTYPE_MAX)
2691                         return -EINVAL;
2692         }
2693
2694         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2695                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2696
2697                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2698                         return -EINVAL;
2699                 if (netif_running(dev))
2700                         return -EBUSY;
2701
2702                 wdev_lock(wdev);
2703                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2704                              IEEE80211_MAX_MESH_ID_LEN);
2705                 wdev->mesh_id_up_len =
2706                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2707                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2708                        wdev->mesh_id_up_len);
2709                 wdev_unlock(wdev);
2710         }
2711
2712         if (info->attrs[NL80211_ATTR_4ADDR]) {
2713                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2714                 change = true;
2715                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2716                 if (err)
2717                         return err;
2718         } else {
2719                 params.use_4addr = -1;
2720         }
2721
2722         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2723                 if (ntype != NL80211_IFTYPE_MONITOR)
2724                         return -EINVAL;
2725                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2726                                           &_flags);
2727                 if (err)
2728                         return err;
2729
2730                 flags = &_flags;
2731                 change = true;
2732         }
2733
2734         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2735                 const u8 *mumimo_groups;
2736                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2737
2738                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2739                         return -EOPNOTSUPP;
2740
2741                 mumimo_groups =
2742                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2743
2744                 /* bits 0 and 63 are reserved and must be zero */
2745                 if ((mumimo_groups[0] & BIT(7)) ||
2746                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2747                         return -EINVAL;
2748
2749                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2750                        VHT_MUMIMO_GROUPS_DATA_LEN);
2751                 change = true;
2752         }
2753
2754         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2755                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2756
2757                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2758                         return -EOPNOTSUPP;
2759
2760                 nla_memcpy(params.macaddr,
2761                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2762                            ETH_ALEN);
2763                 change = true;
2764         }
2765
2766         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2767             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2768                 return -EOPNOTSUPP;
2769
2770         if (change)
2771                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2772         else
2773                 err = 0;
2774
2775         if (!err && params.use_4addr != -1)
2776                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2777
2778         return err;
2779 }
2780
2781 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2782 {
2783         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2784         struct vif_params params;
2785         struct wireless_dev *wdev;
2786         struct sk_buff *msg;
2787         int err;
2788         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2789         u32 flags;
2790
2791         /* to avoid failing a new interface creation due to pending removal */
2792         cfg80211_destroy_ifaces(rdev);
2793
2794         memset(&params, 0, sizeof(params));
2795
2796         if (!info->attrs[NL80211_ATTR_IFNAME])
2797                 return -EINVAL;
2798
2799         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2800                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2801                 if (type > NL80211_IFTYPE_MAX)
2802                         return -EINVAL;
2803         }
2804
2805         if (!rdev->ops->add_virtual_intf ||
2806             !(rdev->wiphy.interface_modes & (1 << type)))
2807                 return -EOPNOTSUPP;
2808
2809         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2810              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2811             info->attrs[NL80211_ATTR_MAC]) {
2812                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2813                            ETH_ALEN);
2814                 if (!is_valid_ether_addr(params.macaddr))
2815                         return -EADDRNOTAVAIL;
2816         }
2817
2818         if (info->attrs[NL80211_ATTR_4ADDR]) {
2819                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2820                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2821                 if (err)
2822                         return err;
2823         }
2824
2825         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2826                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2827                                   &flags);
2828
2829         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2830             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2831                 return -EOPNOTSUPP;
2832
2833         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2834         if (!msg)
2835                 return -ENOMEM;
2836
2837         wdev = rdev_add_virtual_intf(rdev,
2838                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2839                                 NET_NAME_USER, type, err ? NULL : &flags,
2840                                 &params);
2841         if (WARN_ON(!wdev)) {
2842                 nlmsg_free(msg);
2843                 return -EPROTO;
2844         } else if (IS_ERR(wdev)) {
2845                 nlmsg_free(msg);
2846                 return PTR_ERR(wdev);
2847         }
2848
2849         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2850                 wdev->owner_nlportid = info->snd_portid;
2851
2852         switch (type) {
2853         case NL80211_IFTYPE_MESH_POINT:
2854                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2855                         break;
2856                 wdev_lock(wdev);
2857                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2858                              IEEE80211_MAX_MESH_ID_LEN);
2859                 wdev->mesh_id_up_len =
2860                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2861                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2862                        wdev->mesh_id_up_len);
2863                 wdev_unlock(wdev);
2864                 break;
2865         case NL80211_IFTYPE_P2P_DEVICE:
2866                 /*
2867                  * P2P Device doesn't have a netdev, so doesn't go
2868                  * through the netdev notifier and must be added here
2869                  */
2870                 mutex_init(&wdev->mtx);
2871                 INIT_LIST_HEAD(&wdev->event_list);
2872                 spin_lock_init(&wdev->event_lock);
2873                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2874                 spin_lock_init(&wdev->mgmt_registrations_lock);
2875
2876                 wdev->identifier = ++rdev->wdev_id;
2877                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2878                 rdev->devlist_generation++;
2879                 break;
2880         default:
2881                 break;
2882         }
2883
2884         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2885                                rdev, wdev, false) < 0) {
2886                 nlmsg_free(msg);
2887                 return -ENOBUFS;
2888         }
2889
2890         /*
2891          * For wdevs which have no associated netdev object (e.g. of type
2892          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2893          * For all other types, the event will be generated from the
2894          * netdev notifier
2895          */
2896         if (!wdev->netdev)
2897                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2898
2899         return genlmsg_reply(msg, info);
2900 }
2901
2902 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2903 {
2904         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2905         struct wireless_dev *wdev = info->user_ptr[1];
2906
2907         if (!rdev->ops->del_virtual_intf)
2908                 return -EOPNOTSUPP;
2909
2910         /*
2911          * If we remove a wireless device without a netdev then clear
2912          * user_ptr[1] so that nl80211_post_doit won't dereference it
2913          * to check if it needs to do dev_put(). Otherwise it crashes
2914          * since the wdev has been freed, unlike with a netdev where
2915          * we need the dev_put() for the netdev to really be freed.
2916          */
2917         if (!wdev->netdev)
2918                 info->user_ptr[1] = NULL;
2919
2920         return rdev_del_virtual_intf(rdev, wdev);
2921 }
2922
2923 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2924 {
2925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2926         struct net_device *dev = info->user_ptr[1];
2927         u16 noack_map;
2928
2929         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2930                 return -EINVAL;
2931
2932         if (!rdev->ops->set_noack_map)
2933                 return -EOPNOTSUPP;
2934
2935         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2936
2937         return rdev_set_noack_map(rdev, dev, noack_map);
2938 }
2939
2940 struct get_key_cookie {
2941         struct sk_buff *msg;
2942         int error;
2943         int idx;
2944 };
2945
2946 static void get_key_callback(void *c, struct key_params *params)
2947 {
2948         struct nlattr *key;
2949         struct get_key_cookie *cookie = c;
2950
2951         if ((params->key &&
2952              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2953                      params->key_len, params->key)) ||
2954             (params->seq &&
2955              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2956                      params->seq_len, params->seq)) ||
2957             (params->cipher &&
2958              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2959                          params->cipher)))
2960                 goto nla_put_failure;
2961
2962         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2963         if (!key)
2964                 goto nla_put_failure;
2965
2966         if ((params->key &&
2967              nla_put(cookie->msg, NL80211_KEY_DATA,
2968                      params->key_len, params->key)) ||
2969             (params->seq &&
2970              nla_put(cookie->msg, NL80211_KEY_SEQ,
2971                      params->seq_len, params->seq)) ||
2972             (params->cipher &&
2973              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2974                          params->cipher)))
2975                 goto nla_put_failure;
2976
2977         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2978                 goto nla_put_failure;
2979
2980         nla_nest_end(cookie->msg, key);
2981
2982         return;
2983  nla_put_failure:
2984         cookie->error = 1;
2985 }
2986
2987 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2988 {
2989         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2990         int err;
2991         struct net_device *dev = info->user_ptr[1];
2992         u8 key_idx = 0;
2993         const u8 *mac_addr = NULL;
2994         bool pairwise;
2995         struct get_key_cookie cookie = {
2996                 .error = 0,
2997         };
2998         void *hdr;
2999         struct sk_buff *msg;
3000
3001         if (info->attrs[NL80211_ATTR_KEY_IDX])
3002                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3003
3004         if (key_idx > 5)
3005                 return -EINVAL;
3006
3007         if (info->attrs[NL80211_ATTR_MAC])
3008                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3009
3010         pairwise = !!mac_addr;
3011         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3012                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3013
3014                 if (kt >= NUM_NL80211_KEYTYPES)
3015                         return -EINVAL;
3016                 if (kt != NL80211_KEYTYPE_GROUP &&
3017                     kt != NL80211_KEYTYPE_PAIRWISE)
3018                         return -EINVAL;
3019                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3020         }
3021
3022         if (!rdev->ops->get_key)
3023                 return -EOPNOTSUPP;
3024
3025         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3026                 return -ENOENT;
3027
3028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3029         if (!msg)
3030                 return -ENOMEM;
3031
3032         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3033                              NL80211_CMD_NEW_KEY);
3034         if (!hdr)
3035                 goto nla_put_failure;
3036
3037         cookie.msg = msg;
3038         cookie.idx = key_idx;
3039
3040         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3041             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3042                 goto nla_put_failure;
3043         if (mac_addr &&
3044             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3045                 goto nla_put_failure;
3046
3047         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3048                            get_key_callback);
3049
3050         if (err)
3051                 goto free_msg;
3052
3053         if (cookie.error)
3054                 goto nla_put_failure;
3055
3056         genlmsg_end(msg, hdr);
3057         return genlmsg_reply(msg, info);
3058
3059  nla_put_failure:
3060         err = -ENOBUFS;
3061  free_msg:
3062         nlmsg_free(msg);
3063         return err;
3064 }
3065
3066 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3067 {
3068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3069         struct key_parse key;
3070         int err;
3071         struct net_device *dev = info->user_ptr[1];
3072
3073         err = nl80211_parse_key(info, &key);
3074         if (err)
3075                 return err;
3076
3077         if (key.idx < 0)
3078                 return -EINVAL;
3079
3080         /* only support setting default key */
3081         if (!key.def && !key.defmgmt)
3082                 return -EINVAL;
3083
3084         wdev_lock(dev->ieee80211_ptr);
3085
3086         if (key.def) {
3087                 if (!rdev->ops->set_default_key) {
3088                         err = -EOPNOTSUPP;
3089                         goto out;
3090                 }
3091
3092                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3093                 if (err)
3094                         goto out;
3095
3096                 err = rdev_set_default_key(rdev, dev, key.idx,
3097                                                  key.def_uni, key.def_multi);
3098
3099                 if (err)
3100                         goto out;
3101
3102 #ifdef CONFIG_CFG80211_WEXT
3103                 dev->ieee80211_ptr->wext.default_key = key.idx;
3104 #endif
3105         } else {
3106                 if (key.def_uni || !key.def_multi) {
3107                         err = -EINVAL;
3108                         goto out;
3109                 }
3110
3111                 if (!rdev->ops->set_default_mgmt_key) {
3112                         err = -EOPNOTSUPP;
3113                         goto out;
3114                 }
3115
3116                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3117                 if (err)
3118                         goto out;
3119
3120                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3121                 if (err)
3122                         goto out;
3123
3124 #ifdef CONFIG_CFG80211_WEXT
3125                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3126 #endif
3127         }
3128
3129  out:
3130         wdev_unlock(dev->ieee80211_ptr);
3131
3132         return err;
3133 }
3134
3135 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3136 {
3137         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3138         int err;
3139         struct net_device *dev = info->user_ptr[1];
3140         struct key_parse key;
3141         const u8 *mac_addr = NULL;
3142
3143         err = nl80211_parse_key(info, &key);
3144         if (err)
3145                 return err;
3146
3147         if (!key.p.key)
3148                 return -EINVAL;
3149
3150         if (info->attrs[NL80211_ATTR_MAC])
3151                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3152
3153         if (key.type == -1) {
3154                 if (mac_addr)
3155                         key.type = NL80211_KEYTYPE_PAIRWISE;
3156                 else
3157                         key.type = NL80211_KEYTYPE_GROUP;
3158         }
3159
3160         /* for now */
3161         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3162             key.type != NL80211_KEYTYPE_GROUP)
3163                 return -EINVAL;
3164
3165         if (!rdev->ops->add_key)
3166                 return -EOPNOTSUPP;
3167
3168         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3169                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3170                                            mac_addr))
3171                 return -EINVAL;
3172
3173         wdev_lock(dev->ieee80211_ptr);
3174         err = nl80211_key_allowed(dev->ieee80211_ptr);
3175         if (!err)
3176                 err = rdev_add_key(rdev, dev, key.idx,
3177                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3178                                     mac_addr, &key.p);
3179         wdev_unlock(dev->ieee80211_ptr);
3180
3181         return err;
3182 }
3183
3184 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3185 {
3186         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3187         int err;
3188         struct net_device *dev = info->user_ptr[1];
3189         u8 *mac_addr = NULL;
3190         struct key_parse key;
3191
3192         err = nl80211_parse_key(info, &key);
3193         if (err)
3194                 return err;
3195
3196         if (info->attrs[NL80211_ATTR_MAC])
3197                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3198
3199         if (key.type == -1) {
3200                 if (mac_addr)
3201                         key.type = NL80211_KEYTYPE_PAIRWISE;
3202                 else
3203                         key.type = NL80211_KEYTYPE_GROUP;
3204         }
3205
3206         /* for now */
3207         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3208             key.type != NL80211_KEYTYPE_GROUP)
3209                 return -EINVAL;
3210
3211         if (!rdev->ops->del_key)
3212                 return -EOPNOTSUPP;
3213
3214         wdev_lock(dev->ieee80211_ptr);
3215         err = nl80211_key_allowed(dev->ieee80211_ptr);
3216
3217         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3218             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3219                 err = -ENOENT;
3220
3221         if (!err)
3222                 err = rdev_del_key(rdev, dev, key.idx,
3223                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3224                                    mac_addr);
3225
3226 #ifdef CONFIG_CFG80211_WEXT
3227         if (!err) {
3228                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3229                         dev->ieee80211_ptr->wext.default_key = -1;
3230                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3231                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3232         }
3233 #endif
3234         wdev_unlock(dev->ieee80211_ptr);
3235
3236         return err;
3237 }
3238
3239 /* This function returns an error or the number of nested attributes */
3240 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3241 {
3242         struct nlattr *attr;
3243         int n_entries = 0, tmp;
3244
3245         nla_for_each_nested(attr, nl_attr, tmp) {
3246                 if (nla_len(attr) != ETH_ALEN)
3247                         return -EINVAL;
3248
3249                 n_entries++;
3250         }
3251
3252         return n_entries;
3253 }
3254
3255 /*
3256  * This function parses ACL information and allocates memory for ACL data.
3257  * On successful return, the calling function is responsible to free the
3258  * ACL buffer returned by this function.
3259  */
3260 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3261                                                 struct genl_info *info)
3262 {
3263         enum nl80211_acl_policy acl_policy;
3264         struct nlattr *attr;
3265         struct cfg80211_acl_data *acl;
3266         int i = 0, n_entries, tmp;
3267
3268         if (!wiphy->max_acl_mac_addrs)
3269                 return ERR_PTR(-EOPNOTSUPP);
3270
3271         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3272                 return ERR_PTR(-EINVAL);
3273
3274         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3275         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3276             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3277                 return ERR_PTR(-EINVAL);
3278
3279         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3280                 return ERR_PTR(-EINVAL);
3281
3282         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3283         if (n_entries < 0)
3284                 return ERR_PTR(n_entries);
3285
3286         if (n_entries > wiphy->max_acl_mac_addrs)
3287                 return ERR_PTR(-ENOTSUPP);
3288
3289         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3290                       GFP_KERNEL);
3291         if (!acl)
3292                 return ERR_PTR(-ENOMEM);
3293
3294         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3295                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3296                 i++;
3297         }
3298
3299         acl->n_acl_entries = n_entries;
3300         acl->acl_policy = acl_policy;
3301
3302         return acl;
3303 }
3304
3305 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3306 {
3307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3308         struct net_device *dev = info->user_ptr[1];
3309         struct cfg80211_acl_data *acl;
3310         int err;
3311
3312         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3313             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3314                 return -EOPNOTSUPP;
3315
3316         if (!dev->ieee80211_ptr->beacon_interval)
3317                 return -EINVAL;
3318
3319         acl = parse_acl_data(&rdev->wiphy, info);
3320         if (IS_ERR(acl))
3321                 return PTR_ERR(acl);
3322
3323         err = rdev_set_mac_acl(rdev, dev, acl);
3324
3325         kfree(acl);
3326
3327         return err;
3328 }
3329
3330 static int nl80211_parse_beacon(struct nlattr *attrs[],
3331                                 struct cfg80211_beacon_data *bcn)
3332 {
3333         bool haveinfo = false;
3334
3335         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3336             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3337             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3338             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3339                 return -EINVAL;
3340
3341         memset(bcn, 0, sizeof(*bcn));
3342
3343         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3344                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3345                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3346                 if (!bcn->head_len)
3347                         return -EINVAL;
3348                 haveinfo = true;
3349         }
3350
3351         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3352                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3353                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3354                 haveinfo = true;
3355         }
3356
3357         if (!haveinfo)
3358                 return -EINVAL;
3359
3360         if (attrs[NL80211_ATTR_IE]) {
3361                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3362                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3363         }
3364
3365         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3366                 bcn->proberesp_ies =
3367                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3368                 bcn->proberesp_ies_len =
3369                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3370         }
3371
3372         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3373                 bcn->assocresp_ies =
3374                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3375                 bcn->assocresp_ies_len =
3376                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3377         }
3378
3379         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3380                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3381                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3382         }
3383
3384         return 0;
3385 }
3386
3387 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3388                                    struct cfg80211_ap_settings *params)
3389 {
3390         struct wireless_dev *wdev;
3391         bool ret = false;
3392
3393         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3394                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3395                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3396                         continue;
3397
3398                 if (!wdev->preset_chandef.chan)
3399                         continue;
3400
3401                 params->chandef = wdev->preset_chandef;
3402                 ret = true;
3403                 break;
3404         }
3405
3406         return ret;
3407 }
3408
3409 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3410                                     enum nl80211_auth_type auth_type,
3411                                     enum nl80211_commands cmd)
3412 {
3413         if (auth_type > NL80211_AUTHTYPE_MAX)
3414                 return false;
3415
3416         switch (cmd) {
3417         case NL80211_CMD_AUTHENTICATE:
3418                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3419                     auth_type == NL80211_AUTHTYPE_SAE)
3420                         return false;
3421                 return true;
3422         case NL80211_CMD_CONNECT:
3423         case NL80211_CMD_START_AP:
3424                 /* SAE not supported yet */
3425                 if (auth_type == NL80211_AUTHTYPE_SAE)
3426                         return false;
3427                 return true;
3428         default:
3429                 return false;
3430         }
3431 }
3432
3433 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3434 {
3435         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3436         struct net_device *dev = info->user_ptr[1];
3437         struct wireless_dev *wdev = dev->ieee80211_ptr;
3438         struct cfg80211_ap_settings params;
3439         int err;
3440
3441         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3442             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3443                 return -EOPNOTSUPP;
3444
3445         if (!rdev->ops->start_ap)
3446                 return -EOPNOTSUPP;
3447
3448         if (wdev->beacon_interval)
3449                 return -EALREADY;
3450
3451         memset(&params, 0, sizeof(params));
3452
3453         /* these are required for START_AP */
3454         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3455             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3456             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3457                 return -EINVAL;
3458
3459         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3460         if (err)
3461                 return err;
3462
3463         params.beacon_interval =
3464                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3465         params.dtim_period =
3466                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3467
3468         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3469         if (err)
3470                 return err;
3471
3472         /*
3473          * In theory, some of these attributes should be required here
3474          * but since they were not used when the command was originally
3475          * added, keep them optional for old user space programs to let
3476          * them continue to work with drivers that do not need the
3477          * additional information -- drivers must check!
3478          */
3479         if (info->attrs[NL80211_ATTR_SSID]) {
3480                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3481                 params.ssid_len =
3482                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3483                 if (params.ssid_len == 0 ||
3484                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3485                         return -EINVAL;
3486         }
3487
3488         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3489                 params.hidden_ssid = nla_get_u32(
3490                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3491                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3492                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3493                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3494                         return -EINVAL;
3495         }
3496
3497         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3498
3499         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3500                 params.auth_type = nla_get_u32(
3501                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3502                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3503                                              NL80211_CMD_START_AP))
3504                         return -EINVAL;
3505         } else
3506                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3507
3508         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3509                                       NL80211_MAX_NR_CIPHER_SUITES);
3510         if (err)
3511                 return err;
3512
3513         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3514                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3515                         return -EOPNOTSUPP;
3516                 params.inactivity_timeout = nla_get_u16(
3517                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3518         }
3519
3520         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3521                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3522                         return -EINVAL;
3523                 params.p2p_ctwindow =
3524                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3525                 if (params.p2p_ctwindow > 127)
3526                         return -EINVAL;
3527                 if (params.p2p_ctwindow != 0 &&
3528                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3529                         return -EINVAL;
3530         }
3531
3532         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3533                 u8 tmp;
3534
3535                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3536                         return -EINVAL;
3537                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3538                 if (tmp > 1)
3539                         return -EINVAL;
3540                 params.p2p_opp_ps = tmp;
3541                 if (params.p2p_opp_ps != 0 &&
3542                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3543                         return -EINVAL;
3544         }
3545
3546         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3547                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3548                 if (err)
3549                         return err;
3550         } else if (wdev->preset_chandef.chan) {
3551                 params.chandef = wdev->preset_chandef;
3552         } else if (!nl80211_get_ap_channel(rdev, &params))
3553                 return -EINVAL;
3554
3555         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3556                                            wdev->iftype))
3557                 return -EINVAL;
3558
3559         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3560                 params.smps_mode =
3561                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3562                 switch (params.smps_mode) {
3563                 case NL80211_SMPS_OFF:
3564                         break;
3565                 case NL80211_SMPS_STATIC:
3566                         if (!(rdev->wiphy.features &
3567                               NL80211_FEATURE_STATIC_SMPS))
3568                                 return -EINVAL;
3569                         break;
3570                 case NL80211_SMPS_DYNAMIC:
3571                         if (!(rdev->wiphy.features &
3572                               NL80211_FEATURE_DYNAMIC_SMPS))
3573                                 return -EINVAL;
3574                         break;
3575                 default:
3576                         return -EINVAL;
3577                 }
3578         } else {
3579                 params.smps_mode = NL80211_SMPS_OFF;
3580         }
3581
3582         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3583         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3584                 return -EOPNOTSUPP;
3585
3586         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3587                 params.acl = parse_acl_data(&rdev->wiphy, info);
3588                 if (IS_ERR(params.acl))
3589                         return PTR_ERR(params.acl);
3590         }
3591
3592         wdev_lock(wdev);
3593         err = rdev_start_ap(rdev, dev, &params);
3594         if (!err) {
3595                 wdev->preset_chandef = params.chandef;
3596                 wdev->beacon_interval = params.beacon_interval;
3597                 wdev->chandef = params.chandef;
3598                 wdev->ssid_len = params.ssid_len;
3599                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3600         }
3601         wdev_unlock(wdev);
3602
3603         kfree(params.acl);
3604
3605         return err;
3606 }
3607
3608 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3609 {
3610         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3611         struct net_device *dev = info->user_ptr[1];
3612         struct wireless_dev *wdev = dev->ieee80211_ptr;
3613         struct cfg80211_beacon_data params;
3614         int err;
3615
3616         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3617             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3618                 return -EOPNOTSUPP;
3619
3620         if (!rdev->ops->change_beacon)
3621                 return -EOPNOTSUPP;
3622
3623         if (!wdev->beacon_interval)
3624                 return -EINVAL;
3625
3626         err = nl80211_parse_beacon(info->attrs, &params);
3627         if (err)
3628                 return err;
3629
3630         wdev_lock(wdev);
3631         err = rdev_change_beacon(rdev, dev, &params);
3632         wdev_unlock(wdev);
3633
3634         return err;
3635 }
3636
3637 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3638 {
3639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3640         struct net_device *dev = info->user_ptr[1];
3641
3642         return cfg80211_stop_ap(rdev, dev, false);
3643 }
3644
3645 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3646         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3647         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3648         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3649         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3650         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3651         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3652 };
3653
3654 static int parse_station_flags(struct genl_info *info,
3655                                enum nl80211_iftype iftype,
3656                                struct station_parameters *params)
3657 {
3658         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3659         struct nlattr *nla;
3660         int flag;
3661
3662         /*
3663          * Try parsing the new attribute first so userspace
3664          * can specify both for older kernels.
3665          */
3666         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3667         if (nla) {
3668                 struct nl80211_sta_flag_update *sta_flags;
3669
3670                 sta_flags = nla_data(nla);
3671                 params->sta_flags_mask = sta_flags->mask;
3672                 params->sta_flags_set = sta_flags->set;
3673                 params->sta_flags_set &= params->sta_flags_mask;
3674                 if ((params->sta_flags_mask |
3675                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3676                         return -EINVAL;
3677                 return 0;
3678         }
3679
3680         /* if present, parse the old attribute */
3681
3682         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3683         if (!nla)
3684                 return 0;
3685
3686         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3687                              nla, sta_flags_policy))
3688                 return -EINVAL;
3689
3690         /*
3691          * Only allow certain flags for interface types so that
3692          * other attributes are silently ignored. Remember that
3693          * this is backward compatibility code with old userspace
3694          * and shouldn't be hit in other cases anyway.
3695          */
3696         switch (iftype) {
3697         case NL80211_IFTYPE_AP:
3698         case NL80211_IFTYPE_AP_VLAN:
3699         case NL80211_IFTYPE_P2P_GO:
3700                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3701                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3702                                          BIT(NL80211_STA_FLAG_WME) |
3703                                          BIT(NL80211_STA_FLAG_MFP);
3704                 break;
3705         case NL80211_IFTYPE_P2P_CLIENT:
3706         case NL80211_IFTYPE_STATION:
3707                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3708                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3709                 break;
3710         case NL80211_IFTYPE_MESH_POINT:
3711                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3712                                          BIT(NL80211_STA_FLAG_MFP) |
3713                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3714         default:
3715                 return -EINVAL;
3716         }
3717
3718         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3719                 if (flags[flag]) {
3720                         params->sta_flags_set |= (1<<flag);
3721
3722                         /* no longer support new API additions in old API */
3723                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3724                                 return -EINVAL;
3725                 }
3726         }
3727
3728         return 0;
3729 }
3730
3731 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3732                                  int attr)
3733 {
3734         struct nlattr *rate;
3735         u32 bitrate;
3736         u16 bitrate_compat;
3737         enum nl80211_attrs rate_flg;
3738
3739         rate = nla_nest_start(msg, attr);
3740         if (!rate)
3741                 return false;
3742
3743         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3744         bitrate = cfg80211_calculate_bitrate(info);
3745         /* report 16-bit bitrate only if we can */
3746         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3747         if (bitrate > 0 &&
3748             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3749                 return false;
3750         if (bitrate_compat > 0 &&
3751             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3752                 return false;
3753
3754         switch (info->bw) {
3755         case RATE_INFO_BW_5:
3756                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3757                 break;
3758         case RATE_INFO_BW_10:
3759                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3760                 break;
3761         default:
3762                 WARN_ON(1);
3763                 /* fall through */
3764         case RATE_INFO_BW_20:
3765                 rate_flg = 0;
3766                 break;
3767         case RATE_INFO_BW_40:
3768                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3769                 break;
3770         case RATE_INFO_BW_80:
3771                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3772                 break;
3773         case RATE_INFO_BW_160:
3774                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3775                 break;
3776         }
3777
3778         if (rate_flg && nla_put_flag(msg, rate_flg))
3779                 return false;
3780
3781         if (info->flags & RATE_INFO_FLAGS_MCS) {
3782                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3783                         return false;
3784                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3785                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3786                         return false;
3787         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3788                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3789                         return false;
3790                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3791                         return false;
3792                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3793                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3794                         return false;
3795         }
3796
3797         nla_nest_end(msg, rate);
3798         return true;
3799 }
3800
3801 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3802                                int id)
3803 {
3804         void *attr;
3805         int i = 0;
3806
3807         if (!mask)
3808                 return true;
3809
3810         attr = nla_nest_start(msg, id);
3811         if (!attr)
3812                 return false;
3813
3814         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3815                 if (!(mask & BIT(i)))
3816                         continue;
3817
3818                 if (nla_put_u8(msg, i, signal[i]))
3819                         return false;
3820         }
3821
3822         nla_nest_end(msg, attr);
3823
3824         return true;
3825 }
3826
3827 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3828                                 u32 seq, int flags,
3829                                 struct cfg80211_registered_device *rdev,
3830                                 struct net_device *dev,
3831                                 const u8 *mac_addr, struct station_info *sinfo)
3832 {
3833         void *hdr;
3834         struct nlattr *sinfoattr, *bss_param;
3835
3836         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3837         if (!hdr)
3838                 return -1;
3839
3840         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3841             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3842             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3843                 goto nla_put_failure;
3844
3845         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3846         if (!sinfoattr)
3847                 goto nla_put_failure;
3848
3849 #define PUT_SINFO(attr, memb, type) do {                                \
3850         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3851         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3852             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3853                              sinfo->memb))                              \
3854                 goto nla_put_failure;                                   \
3855         } while (0)
3856 #define PUT_SINFO_U64(attr, memb) do {                                  \
3857         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3858             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3859                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3860                 goto nla_put_failure;                                   \
3861         } while (0)
3862
3863         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3864         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3865
3866         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3867                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3868             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3869                         (u32)sinfo->rx_bytes))
3870                 goto nla_put_failure;
3871
3872         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3873                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3874             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3875                         (u32)sinfo->tx_bytes))
3876                 goto nla_put_failure;
3877
3878         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3879         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3880         PUT_SINFO(LLID, llid, u16);
3881         PUT_SINFO(PLID, plid, u16);
3882         PUT_SINFO(PLINK_STATE, plink_state, u8);
3883         PUT_SINFO_U64(RX_DURATION, rx_duration);
3884
3885         switch (rdev->wiphy.signal_type) {
3886         case CFG80211_SIGNAL_TYPE_MBM:
3887                 PUT_SINFO(SIGNAL, signal, u8);
3888                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3889                 break;
3890         default:
3891                 break;
3892         }
3893         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3894                 if (!nl80211_put_signal(msg, sinfo->chains,
3895                                         sinfo->chain_signal,
3896                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3897                         goto nla_put_failure;
3898         }
3899         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3900                 if (!nl80211_put_signal(msg, sinfo->chains,
3901                                         sinfo->chain_signal_avg,
3902                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3903                         goto nla_put_failure;
3904         }
3905         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3906                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3907                                           NL80211_STA_INFO_TX_BITRATE))
3908                         goto nla_put_failure;
3909         }
3910         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3911                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3912                                           NL80211_STA_INFO_RX_BITRATE))
3913                         goto nla_put_failure;
3914         }
3915
3916         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3917         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3918         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3919         PUT_SINFO(TX_FAILED, tx_failed, u32);
3920         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3921         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3922         PUT_SINFO(LOCAL_PM, local_pm, u32);
3923         PUT_SINFO(PEER_PM, peer_pm, u32);
3924         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3925
3926         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3927                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3928                 if (!bss_param)
3929                         goto nla_put_failure;
3930
3931                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3932                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3933                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3934                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3935                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3936                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3937                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3938                                sinfo->bss_param.dtim_period) ||
3939                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3940                                 sinfo->bss_param.beacon_interval))
3941                         goto nla_put_failure;
3942
3943                 nla_nest_end(msg, bss_param);
3944         }
3945         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3946             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3947                     sizeof(struct nl80211_sta_flag_update),
3948                     &sinfo->sta_flags))
3949                 goto nla_put_failure;
3950
3951         PUT_SINFO_U64(T_OFFSET, t_offset);
3952         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3953         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3954         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3955
3956 #undef PUT_SINFO
3957 #undef PUT_SINFO_U64
3958
3959         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3960                 struct nlattr *tidsattr;
3961                 int tid;
3962
3963                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3964                 if (!tidsattr)
3965                         goto nla_put_failure;
3966
3967                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3968                         struct cfg80211_tid_stats *tidstats;
3969                         struct nlattr *tidattr;
3970
3971                         tidstats = &sinfo->pertid[tid];
3972
3973                         if (!tidstats->filled)
3974                                 continue;
3975
3976                         tidattr = nla_nest_start(msg, tid + 1);
3977                         if (!tidattr)
3978                                 goto nla_put_failure;
3979
3980 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3981         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3982             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3983                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3984                 goto nla_put_failure;                                   \
3985         } while (0)
3986
3987                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3988                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3989                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3990                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3991
3992 #undef PUT_TIDVAL_U64
3993                         nla_nest_end(msg, tidattr);
3994                 }
3995
3996                 nla_nest_end(msg, tidsattr);
3997         }
3998
3999         nla_nest_end(msg, sinfoattr);
4000
4001         if (sinfo->assoc_req_ies_len &&
4002             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4003                     sinfo->assoc_req_ies))
4004                 goto nla_put_failure;
4005
4006         genlmsg_end(msg, hdr);
4007         return 0;
4008
4009  nla_put_failure:
4010         genlmsg_cancel(msg, hdr);
4011         return -EMSGSIZE;
4012 }
4013
4014 static int nl80211_dump_station(struct sk_buff *skb,
4015                                 struct netlink_callback *cb)
4016 {
4017         struct station_info sinfo;
4018         struct cfg80211_registered_device *rdev;
4019         struct wireless_dev *wdev;
4020         u8 mac_addr[ETH_ALEN];
4021         int sta_idx = cb->args[2];
4022         int err;
4023
4024         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4025         if (err)
4026                 return err;
4027
4028         if (!wdev->netdev) {
4029                 err = -EINVAL;
4030                 goto out_err;
4031         }
4032
4033         if (!rdev->ops->dump_station) {
4034                 err = -EOPNOTSUPP;
4035                 goto out_err;
4036         }
4037
4038         while (1) {
4039                 memset(&sinfo, 0, sizeof(sinfo));
4040                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4041                                         mac_addr, &sinfo);
4042                 if (err == -ENOENT)
4043                         break;
4044                 if (err)
4045                         goto out_err;
4046
4047                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4048                                 NETLINK_CB(cb->skb).portid,
4049                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4050                                 rdev, wdev->netdev, mac_addr,
4051                                 &sinfo) < 0)
4052                         goto out;
4053
4054                 sta_idx++;
4055         }
4056
4057  out:
4058         cb->args[2] = sta_idx;
4059         err = skb->len;
4060  out_err:
4061         nl80211_finish_wdev_dump(rdev);
4062
4063         return err;
4064 }
4065
4066 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4067 {
4068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4069         struct net_device *dev = info->user_ptr[1];
4070         struct station_info sinfo;
4071         struct sk_buff *msg;
4072         u8 *mac_addr = NULL;
4073         int err;
4074
4075         memset(&sinfo, 0, sizeof(sinfo));
4076
4077         if (!info->attrs[NL80211_ATTR_MAC])
4078                 return -EINVAL;
4079
4080         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4081
4082         if (!rdev->ops->get_station)
4083                 return -EOPNOTSUPP;
4084
4085         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4086         if (err)
4087                 return err;
4088
4089         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4090         if (!msg)
4091                 return -ENOMEM;
4092
4093         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4094                                  info->snd_portid, info->snd_seq, 0,
4095                                  rdev, dev, mac_addr, &sinfo) < 0) {
4096                 nlmsg_free(msg);
4097                 return -ENOBUFS;
4098         }
4099
4100         return genlmsg_reply(msg, info);
4101 }
4102
4103 int cfg80211_check_station_change(struct wiphy *wiphy,
4104                                   struct station_parameters *params,
4105                                   enum cfg80211_station_type statype)
4106 {
4107         if (params->listen_interval != -1 &&
4108             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4109                 return -EINVAL;
4110
4111         if (params->support_p2p_ps != -1 &&
4112             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4113                 return -EINVAL;
4114
4115         if (params->aid &&
4116             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4117             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4118                 return -EINVAL;
4119
4120         /* When you run into this, adjust the code below for the new flag */
4121         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4122
4123         switch (statype) {
4124         case CFG80211_STA_MESH_PEER_KERNEL:
4125         case CFG80211_STA_MESH_PEER_USER:
4126                 /*
4127                  * No ignoring the TDLS flag here -- the userspace mesh
4128                  * code doesn't have the bug of including TDLS in the
4129                  * mask everywhere.
4130                  */
4131                 if (params->sta_flags_mask &
4132                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4133                                   BIT(NL80211_STA_FLAG_MFP) |
4134                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4135                         return -EINVAL;
4136                 break;
4137         case CFG80211_STA_TDLS_PEER_SETUP:
4138         case CFG80211_STA_TDLS_PEER_ACTIVE:
4139                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4140                         return -EINVAL;
4141                 /* ignore since it can't change */
4142                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4143                 break;
4144         default:
4145                 /* disallow mesh-specific things */
4146                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4147                         return -EINVAL;
4148                 if (params->local_pm)
4149                         return -EINVAL;
4150                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4151                         return -EINVAL;
4152         }
4153
4154         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4155             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4156                 /* TDLS can't be set, ... */
4157                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4158                         return -EINVAL;
4159                 /*
4160                  * ... but don't bother the driver with it. This works around
4161                  * a hostapd/wpa_supplicant issue -- it always includes the
4162                  * TLDS_PEER flag in the mask even for AP mode.
4163                  */
4164                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4165         }
4166
4167         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4168             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4169                 /* reject other things that can't change */
4170                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4171                         return -EINVAL;
4172                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4173                         return -EINVAL;
4174                 if (params->supported_rates)
4175                         return -EINVAL;
4176                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4177                         return -EINVAL;
4178         }
4179
4180         if (statype != CFG80211_STA_AP_CLIENT &&
4181             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4182                 if (params->vlan)
4183                         return -EINVAL;
4184         }
4185
4186         switch (statype) {
4187         case CFG80211_STA_AP_MLME_CLIENT:
4188                 /* Use this only for authorizing/unauthorizing a station */
4189                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4190                         return -EOPNOTSUPP;
4191                 break;
4192         case CFG80211_STA_AP_CLIENT:
4193         case CFG80211_STA_AP_CLIENT_UNASSOC:
4194                 /* accept only the listed bits */
4195                 if (params->sta_flags_mask &
4196                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4197                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4198                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4199                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4200                                   BIT(NL80211_STA_FLAG_WME) |
4201                                   BIT(NL80211_STA_FLAG_MFP)))
4202                         return -EINVAL;
4203
4204                 /* but authenticated/associated only if driver handles it */
4205                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4206                     params->sta_flags_mask &
4207                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4208                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4209                         return -EINVAL;
4210                 break;
4211         case CFG80211_STA_IBSS:
4212         case CFG80211_STA_AP_STA:
4213                 /* reject any changes other than AUTHORIZED */
4214                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4215                         return -EINVAL;
4216                 break;
4217         case CFG80211_STA_TDLS_PEER_SETUP:
4218                 /* reject any changes other than AUTHORIZED or WME */
4219                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4220                                                BIT(NL80211_STA_FLAG_WME)))
4221                         return -EINVAL;
4222                 /* force (at least) rates when authorizing */
4223                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4224                     !params->supported_rates)
4225                         return -EINVAL;
4226                 break;
4227         case CFG80211_STA_TDLS_PEER_ACTIVE:
4228                 /* reject any changes */
4229                 return -EINVAL;
4230         case CFG80211_STA_MESH_PEER_KERNEL:
4231                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4232                         return -EINVAL;
4233                 break;
4234         case CFG80211_STA_MESH_PEER_USER:
4235                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4236                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4237                         return -EINVAL;
4238                 break;
4239         }
4240
4241         return 0;
4242 }
4243 EXPORT_SYMBOL(cfg80211_check_station_change);
4244
4245 /*
4246  * Get vlan interface making sure it is running and on the right wiphy.
4247  */
4248 static struct net_device *get_vlan(struct genl_info *info,
4249                                    struct cfg80211_registered_device *rdev)
4250 {
4251         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4252         struct net_device *v;
4253         int ret;
4254
4255         if (!vlanattr)
4256                 return NULL;
4257
4258         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4259         if (!v)
4260                 return ERR_PTR(-ENODEV);
4261
4262         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4263                 ret = -EINVAL;
4264                 goto error;
4265         }
4266
4267         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4268             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4269             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4270                 ret = -EINVAL;
4271                 goto error;
4272         }
4273
4274         if (!netif_running(v)) {
4275                 ret = -ENETDOWN;
4276                 goto error;
4277         }
4278
4279         return v;
4280  error:
4281         dev_put(v);
4282         return ERR_PTR(ret);
4283 }
4284
4285 static const struct nla_policy
4286 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4287         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4288         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4289 };
4290
4291 static int nl80211_parse_sta_wme(struct genl_info *info,
4292                                  struct station_parameters *params)
4293 {
4294         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4295         struct nlattr *nla;
4296         int err;
4297
4298         /* parse WME attributes if present */
4299         if (!info->attrs[NL80211_ATTR_STA_WME])
4300                 return 0;
4301
4302         nla = info->attrs[NL80211_ATTR_STA_WME];
4303         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4304                                nl80211_sta_wme_policy);
4305         if (err)
4306                 return err;
4307
4308         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4309                 params->uapsd_queues = nla_get_u8(
4310                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4311         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4312                 return -EINVAL;
4313
4314         if (tb[NL80211_STA_WME_MAX_SP])
4315                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4316
4317         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4318                 return -EINVAL;
4319
4320         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4321
4322         return 0;
4323 }
4324
4325 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4326                                       struct station_parameters *params)
4327 {
4328         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4329                 params->supported_channels =
4330                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4331                 params->supported_channels_len =
4332                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4333                 /*
4334                  * Need to include at least one (first channel, number of
4335                  * channels) tuple for each subband, and must have proper
4336                  * tuples for the rest of the data as well.
4337                  */
4338                 if (params->supported_channels_len < 2)
4339                         return -EINVAL;
4340                 if (params->supported_channels_len % 2)
4341                         return -EINVAL;
4342         }
4343
4344         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4345                 params->supported_oper_classes =
4346                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4347                 params->supported_oper_classes_len =
4348                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4349                 /*
4350                  * The value of the Length field of the Supported Operating
4351                  * Classes element is between 2 and 253.
4352                  */
4353                 if (params->supported_oper_classes_len < 2 ||
4354                     params->supported_oper_classes_len > 253)
4355                         return -EINVAL;
4356         }
4357         return 0;
4358 }
4359
4360 static int nl80211_set_station_tdls(struct genl_info *info,
4361                                     struct station_parameters *params)
4362 {
4363         int err;
4364         /* Dummy STA entry gets updated once the peer capabilities are known */
4365         if (info->attrs[NL80211_ATTR_PEER_AID])
4366                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4367         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4368                 params->ht_capa =
4369                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4370         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4371                 params->vht_capa =
4372                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4373
4374         err = nl80211_parse_sta_channel_info(info, params);
4375         if (err)
4376                 return err;
4377
4378         return nl80211_parse_sta_wme(info, params);
4379 }
4380
4381 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4382 {
4383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4384         struct net_device *dev = info->user_ptr[1];
4385         struct station_parameters params;
4386         u8 *mac_addr;
4387         int err;
4388
4389         memset(&params, 0, sizeof(params));
4390
4391         if (!rdev->ops->change_station)
4392                 return -EOPNOTSUPP;
4393
4394         /*
4395          * AID and listen_interval properties can be set only for unassociated
4396          * station. Include these parameters here and will check them in
4397          * cfg80211_check_station_change().
4398          */
4399         if (info->attrs[NL80211_ATTR_STA_AID])
4400                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4401
4402         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4403                 params.listen_interval =
4404                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4405         else
4406                 params.listen_interval = -1;
4407
4408         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4409                 u8 tmp;
4410
4411                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4412                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4413                         return -EINVAL;
4414
4415                 params.support_p2p_ps = tmp;
4416         } else {
4417                 params.support_p2p_ps = -1;
4418         }
4419
4420         if (!info->attrs[NL80211_ATTR_MAC])
4421                 return -EINVAL;
4422
4423         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4424
4425         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4426                 params.supported_rates =
4427                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4428                 params.supported_rates_len =
4429                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4430         }
4431
4432         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4433                 params.capability =
4434                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4435                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4436         }
4437
4438         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4439                 params.ext_capab =
4440                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4441                 params.ext_capab_len =
4442                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4443         }
4444
4445         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4446                 return -EINVAL;
4447
4448         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4449                 params.plink_action =
4450                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4451                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4452                         return -EINVAL;
4453         }
4454
4455         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4456                 params.plink_state =
4457                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4458                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4459                         return -EINVAL;
4460                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4461                         params.peer_aid = nla_get_u16(
4462                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4463                         if (params.peer_aid > IEEE80211_MAX_AID)
4464                                 return -EINVAL;
4465                 }
4466                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4467         }
4468
4469         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4470                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4471                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4472
4473                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4474                     pm > NL80211_MESH_POWER_MAX)
4475                         return -EINVAL;
4476
4477                 params.local_pm = pm;
4478         }
4479
4480         /* Include parameters for TDLS peer (will check later) */
4481         err = nl80211_set_station_tdls(info, &params);
4482         if (err)
4483                 return err;
4484
4485         params.vlan = get_vlan(info, rdev);
4486         if (IS_ERR(params.vlan))
4487                 return PTR_ERR(params.vlan);
4488
4489         switch (dev->ieee80211_ptr->iftype) {
4490         case NL80211_IFTYPE_AP:
4491         case NL80211_IFTYPE_AP_VLAN:
4492         case NL80211_IFTYPE_P2P_GO:
4493         case NL80211_IFTYPE_P2P_CLIENT:
4494         case NL80211_IFTYPE_STATION:
4495         case NL80211_IFTYPE_ADHOC:
4496         case NL80211_IFTYPE_MESH_POINT:
4497                 break;
4498         default:
4499                 err = -EOPNOTSUPP;
4500                 goto out_put_vlan;
4501         }
4502
4503         /* driver will call cfg80211_check_station_change() */
4504         err = rdev_change_station(rdev, dev, mac_addr, &params);
4505
4506  out_put_vlan:
4507         if (params.vlan)
4508                 dev_put(params.vlan);
4509
4510         return err;
4511 }
4512
4513 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4514 {
4515         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4516         int err;
4517         struct net_device *dev = info->user_ptr[1];
4518         struct station_parameters params;
4519         u8 *mac_addr = NULL;
4520         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4521                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4522
4523         memset(&params, 0, sizeof(params));
4524
4525         if (!rdev->ops->add_station)
4526                 return -EOPNOTSUPP;
4527
4528         if (!info->attrs[NL80211_ATTR_MAC])
4529                 return -EINVAL;
4530
4531         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4532                 return -EINVAL;
4533
4534         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4535                 return -EINVAL;
4536
4537         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4538             !info->attrs[NL80211_ATTR_PEER_AID])
4539                 return -EINVAL;
4540
4541         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4542         params.supported_rates =
4543                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4544         params.supported_rates_len =
4545                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4546         params.listen_interval =
4547                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4548
4549         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4550                 u8 tmp;
4551
4552                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4553                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4554                         return -EINVAL;
4555
4556                 params.support_p2p_ps = tmp;
4557         } else {
4558                 /*
4559                  * if not specified, assume it's supported for P2P GO interface,
4560                  * and is NOT supported for AP interface
4561                  */
4562                 params.support_p2p_ps =
4563                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4564         }
4565
4566         if (info->attrs[NL80211_ATTR_PEER_AID])
4567                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4568         else
4569                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4570         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4571                 return -EINVAL;
4572
4573         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4574                 params.capability =
4575                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4576                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4577         }
4578
4579         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4580                 params.ext_capab =
4581                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4582                 params.ext_capab_len =
4583                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4584         }
4585
4586         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4587                 params.ht_capa =
4588                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4589
4590         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4591                 params.vht_capa =
4592                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4593
4594         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4595                 params.opmode_notif_used = true;
4596                 params.opmode_notif =
4597                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4598         }
4599
4600         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4601                 params.plink_action =
4602                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4603                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4604                         return -EINVAL;
4605         }
4606
4607         err = nl80211_parse_sta_channel_info(info, &params);
4608         if (err)
4609                 return err;
4610
4611         err = nl80211_parse_sta_wme(info, &params);
4612         if (err)
4613                 return err;
4614
4615         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4616                 return -EINVAL;
4617
4618         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4619          * as userspace might just pass through the capabilities from the IEs
4620          * directly, rather than enforcing this restriction and returning an
4621          * error in this case.
4622          */
4623         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4624                 params.ht_capa = NULL;
4625                 params.vht_capa = NULL;
4626         }
4627
4628         /* When you run into this, adjust the code below for the new flag */
4629         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4630
4631         switch (dev->ieee80211_ptr->iftype) {
4632         case NL80211_IFTYPE_AP:
4633         case NL80211_IFTYPE_AP_VLAN:
4634         case NL80211_IFTYPE_P2P_GO:
4635                 /* ignore WME attributes if iface/sta is not capable */
4636                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4637                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4638                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4639
4640                 /* TDLS peers cannot be added */
4641                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4642                     info->attrs[NL80211_ATTR_PEER_AID])
4643                         return -EINVAL;
4644                 /* but don't bother the driver with it */
4645                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4646
4647                 /* allow authenticated/associated only if driver handles it */
4648                 if (!(rdev->wiphy.features &
4649                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4650                     params.sta_flags_mask & auth_assoc)
4651                         return -EINVAL;
4652
4653                 /* Older userspace, or userspace wanting to be compatible with
4654                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4655                  * and assoc flags in the mask, but assumes the station will be
4656                  * added as associated anyway since this was the required driver
4657                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4658                  * introduced.
4659                  * In order to not bother drivers with this quirk in the API
4660                  * set the flags in both the mask and set for new stations in
4661                  * this case.
4662                  */
4663                 if (!(params.sta_flags_mask & auth_assoc)) {
4664                         params.sta_flags_mask |= auth_assoc;
4665                         params.sta_flags_set |= auth_assoc;
4666                 }
4667
4668                 /* must be last in here for error handling */
4669                 params.vlan = get_vlan(info, rdev);
4670                 if (IS_ERR(params.vlan))
4671                         return PTR_ERR(params.vlan);
4672                 break;
4673         case NL80211_IFTYPE_MESH_POINT:
4674                 /* ignore uAPSD data */
4675                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4676
4677                 /* associated is disallowed */
4678                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4679                         return -EINVAL;
4680                 /* TDLS peers cannot be added */
4681                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4682                     info->attrs[NL80211_ATTR_PEER_AID])
4683                         return -EINVAL;
4684                 break;
4685         case NL80211_IFTYPE_STATION:
4686         case NL80211_IFTYPE_P2P_CLIENT:
4687                 /* ignore uAPSD data */
4688                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4689
4690                 /* these are disallowed */
4691                 if (params.sta_flags_mask &
4692                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4693                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4694                         return -EINVAL;
4695                 /* Only TDLS peers can be added */
4696                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4697                         return -EINVAL;
4698                 /* Can only add if TDLS ... */
4699                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4700                         return -EOPNOTSUPP;
4701                 /* ... with external setup is supported */
4702                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4703                         return -EOPNOTSUPP;
4704                 /*
4705                  * Older wpa_supplicant versions always mark the TDLS peer
4706                  * as authorized, but it shouldn't yet be.
4707                  */
4708                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4709                 break;
4710         default:
4711                 return -EOPNOTSUPP;
4712         }
4713
4714         /* be aware of params.vlan when changing code here */
4715
4716         err = rdev_add_station(rdev, dev, mac_addr, &params);
4717
4718         if (params.vlan)
4719                 dev_put(params.vlan);
4720         return err;
4721 }
4722
4723 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4724 {
4725         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4726         struct net_device *dev = info->user_ptr[1];
4727         struct station_del_parameters params;
4728
4729         memset(&params, 0, sizeof(params));
4730
4731         if (info->attrs[NL80211_ATTR_MAC])
4732                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4733
4734         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4735             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4736             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4737             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4738                 return -EINVAL;
4739
4740         if (!rdev->ops->del_station)
4741                 return -EOPNOTSUPP;
4742
4743         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4744                 params.subtype =
4745                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4746                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4747                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4748                         return -EINVAL;
4749         } else {
4750                 /* Default to Deauthentication frame */
4751                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4752         }
4753
4754         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4755                 params.reason_code =
4756                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4757                 if (params.reason_code == 0)
4758                         return -EINVAL; /* 0 is reserved */
4759         } else {
4760                 /* Default to reason code 2 */
4761                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4762         }
4763
4764         return rdev_del_station(rdev, dev, &params);
4765 }
4766
4767 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4768                                 int flags, struct net_device *dev,
4769                                 u8 *dst, u8 *next_hop,
4770                                 struct mpath_info *pinfo)
4771 {
4772         void *hdr;
4773         struct nlattr *pinfoattr;
4774
4775         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4776         if (!hdr)
4777                 return -1;
4778
4779         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4780             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4781             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4782             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4783                 goto nla_put_failure;
4784
4785         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4786         if (!pinfoattr)
4787                 goto nla_put_failure;
4788         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4789             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4790                         pinfo->frame_qlen))
4791                 goto nla_put_failure;
4792         if (((pinfo->filled & MPATH_INFO_SN) &&
4793              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4794             ((pinfo->filled & MPATH_INFO_METRIC) &&
4795              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4796                          pinfo->metric)) ||
4797             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4798              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4799                          pinfo->exptime)) ||
4800             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4801              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4802                         pinfo->flags)) ||
4803             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4804              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4805                          pinfo->discovery_timeout)) ||
4806             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4807              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4808                         pinfo->discovery_retries)))
4809                 goto nla_put_failure;
4810
4811         nla_nest_end(msg, pinfoattr);
4812
4813         genlmsg_end(msg, hdr);
4814         return 0;
4815
4816  nla_put_failure:
4817         genlmsg_cancel(msg, hdr);
4818         return -EMSGSIZE;
4819 }
4820
4821 static int nl80211_dump_mpath(struct sk_buff *skb,
4822                               struct netlink_callback *cb)
4823 {
4824         struct mpath_info pinfo;
4825         struct cfg80211_registered_device *rdev;
4826         struct wireless_dev *wdev;
4827         u8 dst[ETH_ALEN];
4828         u8 next_hop[ETH_ALEN];
4829         int path_idx = cb->args[2];
4830         int err;
4831
4832         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4833         if (err)
4834                 return err;
4835
4836         if (!rdev->ops->dump_mpath) {
4837                 err = -EOPNOTSUPP;
4838                 goto out_err;
4839         }
4840
4841         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4842                 err = -EOPNOTSUPP;
4843                 goto out_err;
4844         }
4845
4846         while (1) {
4847                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4848                                       next_hop, &pinfo);
4849                 if (err == -ENOENT)
4850                         break;
4851                 if (err)
4852                         goto out_err;
4853
4854                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4855                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4856                                        wdev->netdev, dst, next_hop,
4857                                        &pinfo) < 0)
4858                         goto out;
4859
4860                 path_idx++;
4861         }
4862
4863  out:
4864         cb->args[2] = path_idx;
4865         err = skb->len;
4866  out_err:
4867         nl80211_finish_wdev_dump(rdev);
4868         return err;
4869 }
4870
4871 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4872 {
4873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4874         int err;
4875         struct net_device *dev = info->user_ptr[1];
4876         struct mpath_info pinfo;
4877         struct sk_buff *msg;
4878         u8 *dst = NULL;
4879         u8 next_hop[ETH_ALEN];
4880
4881         memset(&pinfo, 0, sizeof(pinfo));
4882
4883         if (!info->attrs[NL80211_ATTR_MAC])
4884                 return -EINVAL;
4885
4886         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4887
4888         if (!rdev->ops->get_mpath)
4889                 return -EOPNOTSUPP;
4890
4891         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4892                 return -EOPNOTSUPP;
4893
4894         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4895         if (err)
4896                 return err;
4897
4898         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4899         if (!msg)
4900                 return -ENOMEM;
4901
4902         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4903                                  dev, dst, next_hop, &pinfo) < 0) {
4904                 nlmsg_free(msg);
4905                 return -ENOBUFS;
4906         }
4907
4908         return genlmsg_reply(msg, info);
4909 }
4910
4911 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4912 {
4913         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4914         struct net_device *dev = info->user_ptr[1];
4915         u8 *dst = NULL;
4916         u8 *next_hop = NULL;
4917
4918         if (!info->attrs[NL80211_ATTR_MAC])
4919                 return -EINVAL;
4920
4921         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4922                 return -EINVAL;
4923
4924         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4925         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4926
4927         if (!rdev->ops->change_mpath)
4928                 return -EOPNOTSUPP;
4929
4930         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4931                 return -EOPNOTSUPP;
4932
4933         return rdev_change_mpath(rdev, dev, dst, next_hop);
4934 }
4935
4936 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4937 {
4938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4939         struct net_device *dev = info->user_ptr[1];
4940         u8 *dst = NULL;
4941         u8 *next_hop = NULL;
4942
4943         if (!info->attrs[NL80211_ATTR_MAC])
4944                 return -EINVAL;
4945
4946         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4947                 return -EINVAL;
4948
4949         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4950         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4951
4952         if (!rdev->ops->add_mpath)
4953                 return -EOPNOTSUPP;
4954
4955         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4956                 return -EOPNOTSUPP;
4957
4958         return rdev_add_mpath(rdev, dev, dst, next_hop);
4959 }
4960
4961 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4962 {
4963         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4964         struct net_device *dev = info->user_ptr[1];
4965         u8 *dst = NULL;
4966
4967         if (info->attrs[NL80211_ATTR_MAC])
4968                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4969
4970         if (!rdev->ops->del_mpath)
4971                 return -EOPNOTSUPP;
4972
4973         return rdev_del_mpath(rdev, dev, dst);
4974 }
4975
4976 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4977 {
4978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4979         int err;
4980         struct net_device *dev = info->user_ptr[1];
4981         struct mpath_info pinfo;
4982         struct sk_buff *msg;
4983         u8 *dst = NULL;
4984         u8 mpp[ETH_ALEN];
4985
4986         memset(&pinfo, 0, sizeof(pinfo));
4987
4988         if (!info->attrs[NL80211_ATTR_MAC])
4989                 return -EINVAL;
4990
4991         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4992
4993         if (!rdev->ops->get_mpp)
4994                 return -EOPNOTSUPP;
4995
4996         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4997                 return -EOPNOTSUPP;
4998
4999         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5000         if (err)
5001                 return err;
5002
5003         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5004         if (!msg)
5005                 return -ENOMEM;
5006
5007         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5008                                dev, dst, mpp, &pinfo) < 0) {
5009                 nlmsg_free(msg);
5010                 return -ENOBUFS;
5011         }
5012
5013         return genlmsg_reply(msg, info);
5014 }
5015
5016 static int nl80211_dump_mpp(struct sk_buff *skb,
5017                             struct netlink_callback *cb)
5018 {
5019         struct mpath_info pinfo;
5020         struct cfg80211_registered_device *rdev;
5021         struct wireless_dev *wdev;
5022         u8 dst[ETH_ALEN];
5023         u8 mpp[ETH_ALEN];
5024         int path_idx = cb->args[2];
5025         int err;
5026
5027         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5028         if (err)
5029                 return err;
5030
5031         if (!rdev->ops->dump_mpp) {
5032                 err = -EOPNOTSUPP;
5033                 goto out_err;
5034         }
5035
5036         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5037                 err = -EOPNOTSUPP;
5038                 goto out_err;
5039         }
5040
5041         while (1) {
5042                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5043                                     mpp, &pinfo);
5044                 if (err == -ENOENT)
5045                         break;
5046                 if (err)
5047                         goto out_err;
5048
5049                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5050                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5051                                        wdev->netdev, dst, mpp,
5052                                        &pinfo) < 0)
5053                         goto out;
5054
5055                 path_idx++;
5056         }
5057
5058  out:
5059         cb->args[2] = path_idx;
5060         err = skb->len;
5061  out_err:
5062         nl80211_finish_wdev_dump(rdev);
5063         return err;
5064 }
5065
5066 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5067 {
5068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5069         struct net_device *dev = info->user_ptr[1];
5070         struct wireless_dev *wdev = dev->ieee80211_ptr;
5071         struct bss_parameters params;
5072         int err;
5073
5074         memset(&params, 0, sizeof(params));
5075         /* default to not changing parameters */
5076         params.use_cts_prot = -1;
5077         params.use_short_preamble = -1;
5078         params.use_short_slot_time = -1;
5079         params.ap_isolate = -1;
5080         params.ht_opmode = -1;
5081         params.p2p_ctwindow = -1;
5082         params.p2p_opp_ps = -1;
5083
5084         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5085                 params.use_cts_prot =
5086                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5087         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5088                 params.use_short_preamble =
5089                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5090         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5091                 params.use_short_slot_time =
5092                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5093         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5094                 params.basic_rates =
5095                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5096                 params.basic_rates_len =
5097                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5098         }
5099         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5100                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5101         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5102                 params.ht_opmode =
5103                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5104
5105         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5106                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5107                         return -EINVAL;
5108                 params.p2p_ctwindow =
5109                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5110                 if (params.p2p_ctwindow < 0)
5111                         return -EINVAL;
5112                 if (params.p2p_ctwindow != 0 &&
5113                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5114                         return -EINVAL;
5115         }
5116
5117         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5118                 u8 tmp;
5119
5120                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5121                         return -EINVAL;
5122                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5123                 if (tmp > 1)
5124                         return -EINVAL;
5125                 params.p2p_opp_ps = tmp;
5126                 if (params.p2p_opp_ps &&
5127                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5128                         return -EINVAL;
5129         }
5130
5131         if (!rdev->ops->change_bss)
5132                 return -EOPNOTSUPP;
5133
5134         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5135             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5136                 return -EOPNOTSUPP;
5137
5138         wdev_lock(wdev);
5139         err = rdev_change_bss(rdev, dev, &params);
5140         wdev_unlock(wdev);
5141
5142         return err;
5143 }
5144
5145 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5146 {
5147         char *data = NULL;
5148         bool is_indoor;
5149         enum nl80211_user_reg_hint_type user_reg_hint_type;
5150         u32 owner_nlportid;
5151
5152         /*
5153          * You should only get this when cfg80211 hasn't yet initialized
5154          * completely when built-in to the kernel right between the time
5155          * window between nl80211_init() and regulatory_init(), if that is
5156          * even possible.
5157          */
5158         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5159                 return -EINPROGRESS;
5160
5161         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5162                 user_reg_hint_type =
5163                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5164         else
5165                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5166
5167         switch (user_reg_hint_type) {
5168         case NL80211_USER_REG_HINT_USER:
5169         case NL80211_USER_REG_HINT_CELL_BASE:
5170                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5171                         return -EINVAL;
5172
5173                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5174                 return regulatory_hint_user(data, user_reg_hint_type);
5175         case NL80211_USER_REG_HINT_INDOOR:
5176                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5177                         owner_nlportid = info->snd_portid;
5178                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5179                 } else {
5180                         owner_nlportid = 0;
5181                         is_indoor = true;
5182                 }
5183
5184                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5185         default:
5186                 return -EINVAL;
5187         }
5188 }
5189
5190 static int nl80211_get_mesh_config(struct sk_buff *skb,
5191                                    struct genl_info *info)
5192 {
5193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5194         struct net_device *dev = info->user_ptr[1];
5195         struct wireless_dev *wdev = dev->ieee80211_ptr;
5196         struct mesh_config cur_params;
5197         int err = 0;
5198         void *hdr;
5199         struct nlattr *pinfoattr;
5200         struct sk_buff *msg;
5201
5202         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5203                 return -EOPNOTSUPP;
5204
5205         if (!rdev->ops->get_mesh_config)
5206                 return -EOPNOTSUPP;
5207
5208         wdev_lock(wdev);
5209         /* If not connected, get default parameters */
5210         if (!wdev->mesh_id_len)
5211                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5212         else
5213                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5214         wdev_unlock(wdev);
5215
5216         if (err)
5217                 return err;
5218
5219         /* Draw up a netlink message to send back */
5220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5221         if (!msg)
5222                 return -ENOMEM;
5223         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5224                              NL80211_CMD_GET_MESH_CONFIG);
5225         if (!hdr)
5226                 goto out;
5227         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5228         if (!pinfoattr)
5229                 goto nla_put_failure;
5230         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5231             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5232                         cur_params.dot11MeshRetryTimeout) ||
5233             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5234                         cur_params.dot11MeshConfirmTimeout) ||
5235             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5236                         cur_params.dot11MeshHoldingTimeout) ||
5237             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5238                         cur_params.dot11MeshMaxPeerLinks) ||
5239             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5240                        cur_params.dot11MeshMaxRetries) ||
5241             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5242                        cur_params.dot11MeshTTL) ||
5243             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5244                        cur_params.element_ttl) ||
5245             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5246                        cur_params.auto_open_plinks) ||
5247             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5248                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5249             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5250                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5251             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5252                         cur_params.path_refresh_time) ||
5253             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5254                         cur_params.min_discovery_timeout) ||
5255             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5256                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5257             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5258                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5259             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5260                         cur_params.dot11MeshHWMPperrMinInterval) ||
5261             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5262                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5263             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5264                        cur_params.dot11MeshHWMPRootMode) ||
5265             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5266                         cur_params.dot11MeshHWMPRannInterval) ||
5267             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5268                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5269             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5270                        cur_params.dot11MeshForwarding) ||
5271             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5272                         cur_params.rssi_threshold) ||
5273             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5274                         cur_params.ht_opmode) ||
5275             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5276                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5277             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5278                         cur_params.dot11MeshHWMProotInterval) ||
5279             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5280                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5281             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5282                         cur_params.power_mode) ||
5283             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5284                         cur_params.dot11MeshAwakeWindowDuration) ||
5285             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5286                         cur_params.plink_timeout))
5287                 goto nla_put_failure;
5288         nla_nest_end(msg, pinfoattr);
5289         genlmsg_end(msg, hdr);
5290         return genlmsg_reply(msg, info);
5291
5292  nla_put_failure:
5293         genlmsg_cancel(msg, hdr);
5294  out:
5295         nlmsg_free(msg);
5296         return -ENOBUFS;
5297 }
5298
5299 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5300         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5301         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5302         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5303         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5304         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5305         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5306         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5307         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5308         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5309         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5310         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5311         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5312         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5313         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5314         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5315         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5316         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5317         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5318         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5319         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5320         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5321         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5322         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5323         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5324         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5325         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5326         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5327         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5328 };
5329
5330 static const struct nla_policy
5331         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5332         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5333         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5334         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5335         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5336         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5337         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5338         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5339                                     .len = IEEE80211_MAX_DATA_LEN },
5340         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5341 };
5342
5343 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5344 {
5345         u8 val = nla_get_u8(nla);
5346         if (val < min || val > max)
5347                 return -EINVAL;
5348         *out = val;
5349         return 0;
5350 }
5351
5352 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5353 {
5354         u8 val = nla_get_u8(nla);
5355         if (val < min || val > max)
5356                 return -EINVAL;
5357         *out = val;
5358         return 0;
5359 }
5360
5361 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5362 {
5363         u16 val = nla_get_u16(nla);
5364         if (val < min || val > max)
5365                 return -EINVAL;
5366         *out = val;
5367         return 0;
5368 }
5369
5370 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5371 {
5372         u32 val = nla_get_u32(nla);
5373         if (val < min || val > max)
5374                 return -EINVAL;
5375         *out = val;
5376         return 0;
5377 }
5378
5379 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5380 {
5381         s32 val = nla_get_s32(nla);
5382         if (val < min || val > max)
5383                 return -EINVAL;
5384         *out = val;
5385         return 0;
5386 }
5387
5388 static int nl80211_check_power_mode(const struct nlattr *nla,
5389                                     enum nl80211_mesh_power_mode min,
5390                                     enum nl80211_mesh_power_mode max,
5391                                     enum nl80211_mesh_power_mode *out)
5392 {
5393         u32 val = nla_get_u32(nla);
5394         if (val < min || val > max)
5395                 return -EINVAL;
5396         *out = val;
5397         return 0;
5398 }
5399
5400 static int nl80211_parse_mesh_config(struct genl_info *info,
5401                                      struct mesh_config *cfg,
5402                                      u32 *mask_out)
5403 {
5404         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5405         u32 mask = 0;
5406         u16 ht_opmode;
5407
5408 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5409 do {                                                                        \
5410         if (tb[attr]) {                                                     \
5411                 if (fn(tb[attr], min, max, &cfg->param))                    \
5412                         return -EINVAL;                                     \
5413                 mask |= (1 << (attr - 1));                                  \
5414         }                                                                   \
5415 } while (0)
5416
5417         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5418                 return -EINVAL;
5419         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5420                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5421                              nl80211_meshconf_params_policy))
5422                 return -EINVAL;
5423
5424         /* This makes sure that there aren't more than 32 mesh config
5425          * parameters (otherwise our bitfield scheme would not work.) */
5426         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5427
5428         /* Fill in the params struct */
5429         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5430                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5431                                   nl80211_check_u16);
5432         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5433                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5434                                   nl80211_check_u16);
5435         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5436                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5437                                   nl80211_check_u16);
5438         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5439                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5440                                   nl80211_check_u16);
5441         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5442                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5443                                   nl80211_check_u8);
5444         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5445                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5446         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5447                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5448                                   nl80211_check_u8);
5449         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5450                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5451                                   nl80211_check_bool);
5452         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5453                                   1, 255, mask,
5454                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5455                                   nl80211_check_u32);
5456         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5457                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5458                                   nl80211_check_u8);
5459         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5460                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5461                                   nl80211_check_u32);
5462         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5463                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5464                                   nl80211_check_u16);
5465         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5466                                   1, 65535, mask,
5467                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5468                                   nl80211_check_u32);
5469         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5470                                   1, 65535, mask,
5471                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5472                                   nl80211_check_u16);
5473         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5474                                   1, 65535, mask,
5475                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5476                                   nl80211_check_u16);
5477         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5478                                   dot11MeshHWMPnetDiameterTraversalTime,
5479                                   1, 65535, mask,
5480                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5481                                   nl80211_check_u16);
5482         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5483                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5484                                   nl80211_check_u8);
5485         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5486                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5487                                   nl80211_check_u16);
5488         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5489                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5490                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5491                                   nl80211_check_bool);
5492         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5493                                   mask, NL80211_MESHCONF_FORWARDING,
5494                                   nl80211_check_bool);
5495         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5496                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5497                                   nl80211_check_s32);
5498         /*
5499          * Check HT operation mode based on
5500          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5501          */
5502         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5503                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5504
5505                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5506                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5507                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5508                         return -EINVAL;
5509
5510                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5511                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5512                         return -EINVAL;
5513
5514                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5515                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5516                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5517                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5518                                 return -EINVAL;
5519                         break;
5520                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5521                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5522                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5523                                 return -EINVAL;
5524                         break;
5525                 }
5526                 cfg->ht_opmode = ht_opmode;
5527         }
5528         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5529                                   1, 65535, mask,
5530                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5531                                   nl80211_check_u32);
5532         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5533                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5534                                   nl80211_check_u16);
5535         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5536                                   dot11MeshHWMPconfirmationInterval,
5537                                   1, 65535, mask,
5538                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5539                                   nl80211_check_u16);
5540         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5541                                   NL80211_MESH_POWER_ACTIVE,
5542                                   NL80211_MESH_POWER_MAX,
5543                                   mask, NL80211_MESHCONF_POWER_MODE,
5544                                   nl80211_check_power_mode);
5545         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5546                                   0, 65535, mask,
5547                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5548         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5549                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5550                                   nl80211_check_u32);
5551         if (mask_out)
5552                 *mask_out = mask;
5553
5554         return 0;
5555
5556 #undef FILL_IN_MESH_PARAM_IF_SET
5557 }
5558
5559 static int nl80211_parse_mesh_setup(struct genl_info *info,
5560                                      struct mesh_setup *setup)
5561 {
5562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5563         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5564
5565         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5566                 return -EINVAL;
5567         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5568                              info->attrs[NL80211_ATTR_MESH_SETUP],
5569                              nl80211_mesh_setup_params_policy))
5570                 return -EINVAL;
5571
5572         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5573                 setup->sync_method =
5574                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5575                  IEEE80211_SYNC_METHOD_VENDOR :
5576                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5577
5578         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5579                 setup->path_sel_proto =
5580                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5581                  IEEE80211_PATH_PROTOCOL_VENDOR :
5582                  IEEE80211_PATH_PROTOCOL_HWMP;
5583
5584         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5585                 setup->path_metric =
5586                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5587                  IEEE80211_PATH_METRIC_VENDOR :
5588                  IEEE80211_PATH_METRIC_AIRTIME;
5589
5590         if (tb[NL80211_MESH_SETUP_IE]) {
5591                 struct nlattr *ieattr =
5592                         tb[NL80211_MESH_SETUP_IE];
5593                 if (!is_valid_ie_attr(ieattr))
5594                         return -EINVAL;
5595                 setup->ie = nla_data(ieattr);
5596                 setup->ie_len = nla_len(ieattr);
5597         }
5598         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5599             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5600                 return -EINVAL;
5601         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5602         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5603         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5604         if (setup->is_secure)
5605                 setup->user_mpm = true;
5606
5607         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5608                 if (!setup->user_mpm)
5609                         return -EINVAL;
5610                 setup->auth_id =
5611                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5612         }
5613
5614         return 0;
5615 }
5616
5617 static int nl80211_update_mesh_config(struct sk_buff *skb,
5618                                       struct genl_info *info)
5619 {
5620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5621         struct net_device *dev = info->user_ptr[1];
5622         struct wireless_dev *wdev = dev->ieee80211_ptr;
5623         struct mesh_config cfg;
5624         u32 mask;
5625         int err;
5626
5627         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5628                 return -EOPNOTSUPP;
5629
5630         if (!rdev->ops->update_mesh_config)
5631                 return -EOPNOTSUPP;
5632
5633         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5634         if (err)
5635                 return err;
5636
5637         wdev_lock(wdev);
5638         if (!wdev->mesh_id_len)
5639                 err = -ENOLINK;
5640
5641         if (!err)
5642                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5643
5644         wdev_unlock(wdev);
5645
5646         return err;
5647 }
5648
5649 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5650                               struct sk_buff *msg)
5651 {
5652         struct nlattr *nl_reg_rules;
5653         unsigned int i;
5654
5655         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5656             (regdom->dfs_region &&
5657              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5658                 goto nla_put_failure;
5659
5660         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5661         if (!nl_reg_rules)
5662                 goto nla_put_failure;
5663
5664         for (i = 0; i < regdom->n_reg_rules; i++) {
5665                 struct nlattr *nl_reg_rule;
5666                 const struct ieee80211_reg_rule *reg_rule;
5667                 const struct ieee80211_freq_range *freq_range;
5668                 const struct ieee80211_power_rule *power_rule;
5669                 unsigned int max_bandwidth_khz;
5670
5671                 reg_rule = &regdom->reg_rules[i];
5672                 freq_range = &reg_rule->freq_range;
5673                 power_rule = &reg_rule->power_rule;
5674
5675                 nl_reg_rule = nla_nest_start(msg, i);
5676                 if (!nl_reg_rule)
5677                         goto nla_put_failure;
5678
5679                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5680                 if (!max_bandwidth_khz)
5681                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5682                                                                   reg_rule);
5683
5684                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5685                                 reg_rule->flags) ||
5686                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5687                                 freq_range->start_freq_khz) ||
5688                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5689                                 freq_range->end_freq_khz) ||
5690                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5691                                 max_bandwidth_khz) ||
5692                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5693                                 power_rule->max_antenna_gain) ||
5694                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5695                                 power_rule->max_eirp) ||
5696                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5697                                 reg_rule->dfs_cac_ms))
5698                         goto nla_put_failure;
5699
5700                 nla_nest_end(msg, nl_reg_rule);
5701         }
5702
5703         nla_nest_end(msg, nl_reg_rules);
5704         return 0;
5705
5706 nla_put_failure:
5707         return -EMSGSIZE;
5708 }
5709
5710 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5711 {
5712         const struct ieee80211_regdomain *regdom = NULL;
5713         struct cfg80211_registered_device *rdev;
5714         struct wiphy *wiphy = NULL;
5715         struct sk_buff *msg;
5716         void *hdr;
5717
5718         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5719         if (!msg)
5720                 return -ENOBUFS;
5721
5722         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5723                              NL80211_CMD_GET_REG);
5724         if (!hdr)
5725                 goto put_failure;
5726
5727         if (info->attrs[NL80211_ATTR_WIPHY]) {
5728                 bool self_managed;
5729
5730                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5731                 if (IS_ERR(rdev)) {
5732                         nlmsg_free(msg);
5733                         return PTR_ERR(rdev);
5734                 }
5735
5736                 wiphy = &rdev->wiphy;
5737                 self_managed = wiphy->regulatory_flags &
5738                                REGULATORY_WIPHY_SELF_MANAGED;
5739                 regdom = get_wiphy_regdom(wiphy);
5740
5741                 /* a self-managed-reg device must have a private regdom */
5742                 if (WARN_ON(!regdom && self_managed)) {
5743                         nlmsg_free(msg);
5744                         return -EINVAL;
5745                 }
5746
5747                 if (regdom &&
5748                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5749                         goto nla_put_failure;
5750         }
5751
5752         if (!wiphy && reg_last_request_cell_base() &&
5753             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5754                         NL80211_USER_REG_HINT_CELL_BASE))
5755                 goto nla_put_failure;
5756
5757         rcu_read_lock();
5758
5759         if (!regdom)
5760                 regdom = rcu_dereference(cfg80211_regdomain);
5761
5762         if (nl80211_put_regdom(regdom, msg))
5763                 goto nla_put_failure_rcu;
5764
5765         rcu_read_unlock();
5766
5767         genlmsg_end(msg, hdr);
5768         return genlmsg_reply(msg, info);
5769
5770 nla_put_failure_rcu:
5771         rcu_read_unlock();
5772 nla_put_failure:
5773         genlmsg_cancel(msg, hdr);
5774 put_failure:
5775         nlmsg_free(msg);
5776         return -EMSGSIZE;
5777 }
5778
5779 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5780                                u32 seq, int flags, struct wiphy *wiphy,
5781                                const struct ieee80211_regdomain *regdom)
5782 {
5783         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5784                                    NL80211_CMD_GET_REG);
5785
5786         if (!hdr)
5787                 return -1;
5788
5789         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5790
5791         if (nl80211_put_regdom(regdom, msg))
5792                 goto nla_put_failure;
5793
5794         if (!wiphy && reg_last_request_cell_base() &&
5795             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5796                         NL80211_USER_REG_HINT_CELL_BASE))
5797                 goto nla_put_failure;
5798
5799         if (wiphy &&
5800             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5801                 goto nla_put_failure;
5802
5803         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5804             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5805                 goto nla_put_failure;
5806
5807         genlmsg_end(msg, hdr);
5808         return 0;
5809
5810 nla_put_failure:
5811         genlmsg_cancel(msg, hdr);
5812         return -EMSGSIZE;
5813 }
5814
5815 static int nl80211_get_reg_dump(struct sk_buff *skb,
5816                                 struct netlink_callback *cb)
5817 {
5818         const struct ieee80211_regdomain *regdom = NULL;
5819         struct cfg80211_registered_device *rdev;
5820         int err, reg_idx, start = cb->args[2];
5821
5822         rtnl_lock();
5823
5824         if (cfg80211_regdomain && start == 0) {
5825                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5826                                           NLM_F_MULTI, NULL,
5827                                           rtnl_dereference(cfg80211_regdomain));
5828                 if (err < 0)
5829                         goto out_err;
5830         }
5831
5832         /* the global regdom is idx 0 */
5833         reg_idx = 1;
5834         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5835                 regdom = get_wiphy_regdom(&rdev->wiphy);
5836                 if (!regdom)
5837                         continue;
5838
5839                 if (++reg_idx <= start)
5840                         continue;
5841
5842                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5843                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5844                 if (err < 0) {
5845                         reg_idx--;
5846                         break;
5847                 }
5848         }
5849
5850         cb->args[2] = reg_idx;
5851         err = skb->len;
5852 out_err:
5853         rtnl_unlock();
5854         return err;
5855 }
5856
5857 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5858 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5859         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5860         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5861         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5862         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5863         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5864         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5865         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5866 };
5867
5868 static int parse_reg_rule(struct nlattr *tb[],
5869         struct ieee80211_reg_rule *reg_rule)
5870 {
5871         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5872         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5873
5874         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5875                 return -EINVAL;
5876         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5877                 return -EINVAL;
5878         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5879                 return -EINVAL;
5880         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5881                 return -EINVAL;
5882         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5883                 return -EINVAL;
5884
5885         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5886
5887         freq_range->start_freq_khz =
5888                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5889         freq_range->end_freq_khz =
5890                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5891         freq_range->max_bandwidth_khz =
5892                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5893
5894         power_rule->max_eirp =
5895                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5896
5897         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5898                 power_rule->max_antenna_gain =
5899                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5900
5901         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5902                 reg_rule->dfs_cac_ms =
5903                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5904
5905         return 0;
5906 }
5907
5908 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5909 {
5910         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5911         struct nlattr *nl_reg_rule;
5912         char *alpha2;
5913         int rem_reg_rules, r;
5914         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5915         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5916         struct ieee80211_regdomain *rd;
5917
5918         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5919                 return -EINVAL;
5920
5921         if (!info->attrs[NL80211_ATTR_REG_RULES])
5922                 return -EINVAL;
5923
5924         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5925
5926         if (info->attrs[NL80211_ATTR_DFS_REGION])
5927                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5928
5929         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5930                             rem_reg_rules) {
5931                 num_rules++;
5932                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5933                         return -EINVAL;
5934         }
5935
5936         if (!reg_is_valid_request(alpha2))
5937                 return -EINVAL;
5938
5939         size_of_regd = sizeof(struct ieee80211_regdomain) +
5940                        num_rules * sizeof(struct ieee80211_reg_rule);
5941
5942         rd = kzalloc(size_of_regd, GFP_KERNEL);
5943         if (!rd)
5944                 return -ENOMEM;
5945
5946         rd->n_reg_rules = num_rules;
5947         rd->alpha2[0] = alpha2[0];
5948         rd->alpha2[1] = alpha2[1];
5949
5950         /*
5951          * Disable DFS master mode if the DFS region was
5952          * not supported or known on this kernel.
5953          */
5954         if (reg_supported_dfs_region(dfs_region))
5955                 rd->dfs_region = dfs_region;
5956
5957         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5958                             rem_reg_rules) {
5959                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5960                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5961                               reg_rule_policy);
5962                 if (r)
5963                         goto bad_reg;
5964                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5965                 if (r)
5966                         goto bad_reg;
5967
5968                 rule_idx++;
5969
5970                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5971                         r = -EINVAL;
5972                         goto bad_reg;
5973                 }
5974         }
5975
5976         /* set_regdom takes ownership of rd */
5977         return set_regdom(rd, REGD_SOURCE_CRDA);
5978  bad_reg:
5979         kfree(rd);
5980         return r;
5981 }
5982 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5983
5984 static int validate_scan_freqs(struct nlattr *freqs)
5985 {
5986         struct nlattr *attr1, *attr2;
5987         int n_channels = 0, tmp1, tmp2;
5988
5989         nla_for_each_nested(attr1, freqs, tmp1) {
5990                 n_channels++;
5991                 /*
5992                  * Some hardware has a limited channel list for
5993                  * scanning, and it is pretty much nonsensical
5994                  * to scan for a channel twice, so disallow that
5995                  * and don't require drivers to check that the
5996                  * channel list they get isn't longer than what
5997                  * they can scan, as long as they can scan all
5998                  * the channels they registered at once.
5999                  */
6000                 nla_for_each_nested(attr2, freqs, tmp2)
6001                         if (attr1 != attr2 &&
6002                             nla_get_u32(attr1) == nla_get_u32(attr2))
6003                                 return 0;
6004         }
6005
6006         return n_channels;
6007 }
6008
6009 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6010 {
6011         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6012 }
6013
6014 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6015                             struct cfg80211_bss_selection *bss_select)
6016 {
6017         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6018         struct nlattr *nest;
6019         int err;
6020         bool found = false;
6021         int i;
6022
6023         /* only process one nested attribute */
6024         nest = nla_data(nla);
6025         if (!nla_ok(nest, nla_len(nest)))
6026                 return -EINVAL;
6027
6028         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
6029                         nla_len(nest), nl80211_bss_select_policy);
6030         if (err)
6031                 return err;
6032
6033         /* only one attribute may be given */
6034         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6035                 if (attr[i]) {
6036                         if (found)
6037                                 return -EINVAL;
6038                         found = true;
6039                 }
6040         }
6041
6042         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6043
6044         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6045                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6046
6047         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6048                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6049                 bss_select->param.band_pref =
6050                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6051                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6052                         return -EINVAL;
6053         }
6054
6055         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6056                 struct nl80211_bss_select_rssi_adjust *adj_param;
6057
6058                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6059                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6060                 bss_select->param.adjust.band = adj_param->band;
6061                 bss_select->param.adjust.delta = adj_param->delta;
6062                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6063                         return -EINVAL;
6064         }
6065
6066         /* user-space did not provide behaviour attribute */
6067         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6068                 return -EINVAL;
6069
6070         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6071                 return -EINVAL;
6072
6073         return 0;
6074 }
6075
6076 static int nl80211_parse_random_mac(struct nlattr **attrs,
6077                                     u8 *mac_addr, u8 *mac_addr_mask)
6078 {
6079         int i;
6080
6081         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6082                 eth_zero_addr(mac_addr);
6083                 eth_zero_addr(mac_addr_mask);
6084                 mac_addr[0] = 0x2;
6085                 mac_addr_mask[0] = 0x3;
6086
6087                 return 0;
6088         }
6089
6090         /* need both or none */
6091         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6092                 return -EINVAL;
6093
6094         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6095         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6096
6097         /* don't allow or configure an mcast address */
6098         if (!is_multicast_ether_addr(mac_addr_mask) ||
6099             is_multicast_ether_addr(mac_addr))
6100                 return -EINVAL;
6101
6102         /*
6103          * allow users to pass a MAC address that has bits set outside
6104          * of the mask, but don't bother drivers with having to deal
6105          * with such bits
6106          */
6107         for (i = 0; i < ETH_ALEN; i++)
6108                 mac_addr[i] &= mac_addr_mask[i];
6109
6110         return 0;
6111 }
6112
6113 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6114 {
6115         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6116         struct wireless_dev *wdev = info->user_ptr[1];
6117         struct cfg80211_scan_request *request;
6118         struct nlattr *attr;
6119         struct wiphy *wiphy;
6120         int err, tmp, n_ssids = 0, n_channels, i;
6121         size_t ie_len;
6122
6123         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6124                 return -EINVAL;
6125
6126         wiphy = &rdev->wiphy;
6127
6128         if (!rdev->ops->scan)
6129                 return -EOPNOTSUPP;
6130
6131         if (rdev->scan_req || rdev->scan_msg) {
6132                 err = -EBUSY;
6133                 goto unlock;
6134         }
6135
6136         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6137                 n_channels = validate_scan_freqs(
6138                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6139                 if (!n_channels) {
6140                         err = -EINVAL;
6141                         goto unlock;
6142                 }
6143         } else {
6144                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6145         }
6146
6147         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6148                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6149                         n_ssids++;
6150
6151         if (n_ssids > wiphy->max_scan_ssids) {
6152                 err = -EINVAL;
6153                 goto unlock;
6154         }
6155
6156         if (info->attrs[NL80211_ATTR_IE])
6157                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6158         else
6159                 ie_len = 0;
6160
6161         if (ie_len > wiphy->max_scan_ie_len) {
6162                 err = -EINVAL;
6163                 goto unlock;
6164         }
6165
6166         request = kzalloc(sizeof(*request)
6167                         + sizeof(*request->ssids) * n_ssids
6168                         + sizeof(*request->channels) * n_channels
6169                         + ie_len, GFP_KERNEL);
6170         if (!request) {
6171                 err = -ENOMEM;
6172                 goto unlock;
6173         }
6174
6175         if (n_ssids)
6176                 request->ssids = (void *)&request->channels[n_channels];
6177         request->n_ssids = n_ssids;
6178         if (ie_len) {
6179                 if (n_ssids)
6180                         request->ie = (void *)(request->ssids + n_ssids);
6181                 else
6182                         request->ie = (void *)(request->channels + n_channels);
6183         }
6184
6185         i = 0;
6186         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6187                 /* user specified, bail out if channel not found */
6188                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6189                         struct ieee80211_channel *chan;
6190
6191                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6192
6193                         if (!chan) {
6194                                 err = -EINVAL;
6195                                 goto out_free;
6196                         }
6197
6198                         /* ignore disabled channels */
6199                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6200                                 continue;
6201
6202                         request->channels[i] = chan;
6203                         i++;
6204                 }
6205         } else {
6206                 enum nl80211_band band;
6207
6208                 /* all channels */
6209                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6210                         int j;
6211
6212                         if (!wiphy->bands[band])
6213                                 continue;
6214                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6215                                 struct ieee80211_channel *chan;
6216
6217                                 chan = &wiphy->bands[band]->channels[j];
6218
6219                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6220                                         continue;
6221
6222                                 request->channels[i] = chan;
6223                                 i++;
6224                         }
6225                 }
6226         }
6227
6228         if (!i) {
6229                 err = -EINVAL;
6230                 goto out_free;
6231         }
6232
6233         request->n_channels = i;
6234
6235         i = 0;
6236         if (n_ssids) {
6237                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6238                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6239                                 err = -EINVAL;
6240                                 goto out_free;
6241                         }
6242                         request->ssids[i].ssid_len = nla_len(attr);
6243                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6244                         i++;
6245                 }
6246         }
6247
6248         if (info->attrs[NL80211_ATTR_IE]) {
6249                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6250                 memcpy((void *)request->ie,
6251                        nla_data(info->attrs[NL80211_ATTR_IE]),
6252                        request->ie_len);
6253         }
6254
6255         for (i = 0; i < NUM_NL80211_BANDS; i++)
6256                 if (wiphy->bands[i])
6257                         request->rates[i] =
6258                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6259
6260         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6261                 nla_for_each_nested(attr,
6262                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6263                                     tmp) {
6264                         enum nl80211_band band = nla_type(attr);
6265
6266                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6267                                 err = -EINVAL;
6268                                 goto out_free;
6269                         }
6270
6271                         if (!wiphy->bands[band])
6272                                 continue;
6273
6274                         err = ieee80211_get_ratemask(wiphy->bands[band],
6275                                                      nla_data(attr),
6276                                                      nla_len(attr),
6277                                                      &request->rates[band]);
6278                         if (err)
6279                                 goto out_free;
6280                 }
6281         }
6282
6283         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6284                 if (!wiphy_ext_feature_isset(wiphy,
6285                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6286                         err = -EOPNOTSUPP;
6287                         goto out_free;
6288                 }
6289
6290                 request->duration =
6291                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6292                 request->duration_mandatory =
6293                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6294         }
6295
6296         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6297                 request->flags = nla_get_u32(
6298                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6299                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6300                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6301                         err = -EOPNOTSUPP;
6302                         goto out_free;
6303                 }
6304
6305                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6306                         if (!(wiphy->features &
6307                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6308                                 err = -EOPNOTSUPP;
6309                                 goto out_free;
6310                         }
6311
6312                         if (wdev->current_bss) {
6313                                 err = -EOPNOTSUPP;
6314                                 goto out_free;
6315                         }
6316
6317                         err = nl80211_parse_random_mac(info->attrs,
6318                                                        request->mac_addr,
6319                                                        request->mac_addr_mask);
6320                         if (err)
6321                                 goto out_free;
6322                 }
6323         }
6324
6325         request->no_cck =
6326                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6327
6328         if (info->attrs[NL80211_ATTR_MAC])
6329                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6330                        ETH_ALEN);
6331         else
6332                 eth_broadcast_addr(request->bssid);
6333
6334         request->wdev = wdev;
6335         request->wiphy = &rdev->wiphy;
6336         request->scan_start = jiffies;
6337
6338         rdev->scan_req = request;
6339         err = rdev_scan(rdev, request);
6340
6341         if (!err) {
6342                 nl80211_send_scan_start(rdev, wdev);
6343                 if (wdev->netdev)
6344                         dev_hold(wdev->netdev);
6345         } else {
6346  out_free:
6347                 rdev->scan_req = NULL;
6348                 kfree(request);
6349         }
6350
6351  unlock:
6352         return err;
6353 }
6354
6355 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6356 {
6357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6358         struct wireless_dev *wdev = info->user_ptr[1];
6359
6360         if (!rdev->ops->abort_scan)
6361                 return -EOPNOTSUPP;
6362
6363         if (rdev->scan_msg)
6364                 return 0;
6365
6366         if (!rdev->scan_req)
6367                 return -ENOENT;
6368
6369         rdev_abort_scan(rdev, wdev);
6370         return 0;
6371 }
6372
6373 static int
6374 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6375                                struct cfg80211_sched_scan_request *request,
6376                                struct nlattr **attrs)
6377 {
6378         int tmp, err, i = 0;
6379         struct nlattr *attr;
6380
6381         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6382                 u32 interval;
6383
6384                 /*
6385                  * If scan plans are not specified,
6386                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6387                  * case one scan plan will be set with the specified scan
6388                  * interval and infinite number of iterations.
6389                  */
6390                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6391                         return -EINVAL;
6392
6393                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6394                 if (!interval)
6395                         return -EINVAL;
6396
6397                 request->scan_plans[0].interval =
6398                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6399                 if (!request->scan_plans[0].interval)
6400                         return -EINVAL;
6401
6402                 if (request->scan_plans[0].interval >
6403                     wiphy->max_sched_scan_plan_interval)
6404                         request->scan_plans[0].interval =
6405                                 wiphy->max_sched_scan_plan_interval;
6406
6407                 return 0;
6408         }
6409
6410         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6411                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6412
6413                 if (WARN_ON(i >= n_plans))
6414                         return -EINVAL;
6415
6416                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6417                                 nla_data(attr), nla_len(attr),
6418                                 nl80211_plan_policy);
6419                 if (err)
6420                         return err;
6421
6422                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6423                         return -EINVAL;
6424
6425                 request->scan_plans[i].interval =
6426                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6427                 if (!request->scan_plans[i].interval ||
6428                     request->scan_plans[i].interval >
6429                     wiphy->max_sched_scan_plan_interval)
6430                         return -EINVAL;
6431
6432                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6433                         request->scan_plans[i].iterations =
6434                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6435                         if (!request->scan_plans[i].iterations ||
6436                             (request->scan_plans[i].iterations >
6437                              wiphy->max_sched_scan_plan_iterations))
6438                                 return -EINVAL;
6439                 } else if (i < n_plans - 1) {
6440                         /*
6441                          * All scan plans but the last one must specify
6442                          * a finite number of iterations
6443                          */
6444                         return -EINVAL;
6445                 }
6446
6447                 i++;
6448         }
6449
6450         /*
6451          * The last scan plan must not specify the number of
6452          * iterations, it is supposed to run infinitely
6453          */
6454         if (request->scan_plans[n_plans - 1].iterations)
6455                 return  -EINVAL;
6456
6457         return 0;
6458 }
6459
6460 static struct cfg80211_sched_scan_request *
6461 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6462                          struct nlattr **attrs)
6463 {
6464         struct cfg80211_sched_scan_request *request;
6465         struct nlattr *attr;
6466         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6467         enum nl80211_band band;
6468         size_t ie_len;
6469         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6470         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6471
6472         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6473                 return ERR_PTR(-EINVAL);
6474
6475         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6476                 n_channels = validate_scan_freqs(
6477                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6478                 if (!n_channels)
6479                         return ERR_PTR(-EINVAL);
6480         } else {
6481                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6482         }
6483
6484         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6485                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6486                                     tmp)
6487                         n_ssids++;
6488
6489         if (n_ssids > wiphy->max_sched_scan_ssids)
6490                 return ERR_PTR(-EINVAL);
6491
6492         /*
6493          * First, count the number of 'real' matchsets. Due to an issue with
6494          * the old implementation, matchsets containing only the RSSI attribute
6495          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6496          * RSSI for all matchsets, rather than their own matchset for reporting
6497          * all APs with a strong RSSI. This is needed to be compatible with
6498          * older userspace that treated a matchset with only the RSSI as the
6499          * global RSSI for all other matchsets - if there are other matchsets.
6500          */
6501         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6502                 nla_for_each_nested(attr,
6503                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6504                                     tmp) {
6505                         struct nlattr *rssi;
6506
6507                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6508                                         nla_data(attr), nla_len(attr),
6509                                         nl80211_match_policy);
6510                         if (err)
6511                                 return ERR_PTR(err);
6512                         /* add other standalone attributes here */
6513                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6514                                 n_match_sets++;
6515                                 continue;
6516                         }
6517                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6518                         if (rssi)
6519                                 default_match_rssi = nla_get_s32(rssi);
6520                 }
6521         }
6522
6523         /* However, if there's no other matchset, add the RSSI one */
6524         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6525                 n_match_sets = 1;
6526
6527         if (n_match_sets > wiphy->max_match_sets)
6528                 return ERR_PTR(-EINVAL);
6529
6530         if (attrs[NL80211_ATTR_IE])
6531                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6532         else
6533                 ie_len = 0;
6534
6535         if (ie_len > wiphy->max_sched_scan_ie_len)
6536                 return ERR_PTR(-EINVAL);
6537
6538         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6539                 /*
6540                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6541                  * each scan plan already specifies its own interval
6542                  */
6543                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6544                         return ERR_PTR(-EINVAL);
6545
6546                 nla_for_each_nested(attr,
6547                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6548                         n_plans++;
6549         } else {
6550                 /*
6551                  * The scan interval attribute is kept for backward
6552                  * compatibility. If no scan plans are specified and sched scan
6553                  * interval is specified, one scan plan will be set with this
6554                  * scan interval and infinite number of iterations.
6555                  */
6556                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6557                         return ERR_PTR(-EINVAL);
6558
6559                 n_plans = 1;
6560         }
6561
6562         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6563                 return ERR_PTR(-EINVAL);
6564
6565         request = kzalloc(sizeof(*request)
6566                         + sizeof(*request->ssids) * n_ssids
6567                         + sizeof(*request->match_sets) * n_match_sets
6568                         + sizeof(*request->scan_plans) * n_plans
6569                         + sizeof(*request->channels) * n_channels
6570                         + ie_len, GFP_KERNEL);
6571         if (!request)
6572                 return ERR_PTR(-ENOMEM);
6573
6574         if (n_ssids)
6575                 request->ssids = (void *)&request->channels[n_channels];
6576         request->n_ssids = n_ssids;
6577         if (ie_len) {
6578                 if (n_ssids)
6579                         request->ie = (void *)(request->ssids + n_ssids);
6580                 else
6581                         request->ie = (void *)(request->channels + n_channels);
6582         }
6583
6584         if (n_match_sets) {
6585                 if (request->ie)
6586                         request->match_sets = (void *)(request->ie + ie_len);
6587                 else if (n_ssids)
6588                         request->match_sets =
6589                                 (void *)(request->ssids + n_ssids);
6590                 else
6591                         request->match_sets =
6592                                 (void *)(request->channels + n_channels);
6593         }
6594         request->n_match_sets = n_match_sets;
6595
6596         if (n_match_sets)
6597                 request->scan_plans = (void *)(request->match_sets +
6598                                                n_match_sets);
6599         else if (request->ie)
6600                 request->scan_plans = (void *)(request->ie + ie_len);
6601         else if (n_ssids)
6602                 request->scan_plans = (void *)(request->ssids + n_ssids);
6603         else
6604                 request->scan_plans = (void *)(request->channels + n_channels);
6605
6606         request->n_scan_plans = n_plans;
6607
6608         i = 0;
6609         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6610                 /* user specified, bail out if channel not found */
6611                 nla_for_each_nested(attr,
6612                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6613                                     tmp) {
6614                         struct ieee80211_channel *chan;
6615
6616                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6617
6618                         if (!chan) {
6619                                 err = -EINVAL;
6620                                 goto out_free;
6621                         }
6622
6623                         /* ignore disabled channels */
6624                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6625                                 continue;
6626
6627                         request->channels[i] = chan;
6628                         i++;
6629                 }
6630         } else {
6631                 /* all channels */
6632                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6633                         int j;
6634
6635                         if (!wiphy->bands[band])
6636                                 continue;
6637                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6638                                 struct ieee80211_channel *chan;
6639
6640                                 chan = &wiphy->bands[band]->channels[j];
6641
6642                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6643                                         continue;
6644
6645                                 request->channels[i] = chan;
6646                                 i++;
6647                         }
6648                 }
6649         }
6650
6651         if (!i) {
6652                 err = -EINVAL;
6653                 goto out_free;
6654         }
6655
6656         request->n_channels = i;
6657
6658         i = 0;
6659         if (n_ssids) {
6660                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6661                                     tmp) {
6662                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6663                                 err = -EINVAL;
6664                                 goto out_free;
6665                         }
6666                         request->ssids[i].ssid_len = nla_len(attr);
6667                         memcpy(request->ssids[i].ssid, nla_data(attr),
6668                                nla_len(attr));
6669                         i++;
6670                 }
6671         }
6672
6673         i = 0;
6674         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6675                 nla_for_each_nested(attr,
6676                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6677                                     tmp) {
6678                         struct nlattr *ssid, *rssi;
6679
6680                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6681                                         nla_data(attr), nla_len(attr),
6682                                         nl80211_match_policy);
6683                         if (err)
6684                                 goto out_free;
6685                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6686                         if (ssid) {
6687                                 if (WARN_ON(i >= n_match_sets)) {
6688                                         /* this indicates a programming error,
6689                                          * the loop above should have verified
6690                                          * things properly
6691                                          */
6692                                         err = -EINVAL;
6693                                         goto out_free;
6694                                 }
6695
6696                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6697                                         err = -EINVAL;
6698                                         goto out_free;
6699                                 }
6700                                 memcpy(request->match_sets[i].ssid.ssid,
6701                                        nla_data(ssid), nla_len(ssid));
6702                                 request->match_sets[i].ssid.ssid_len =
6703                                         nla_len(ssid);
6704                                 /* special attribute - old implementation w/a */
6705                                 request->match_sets[i].rssi_thold =
6706                                         default_match_rssi;
6707                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6708                                 if (rssi)
6709                                         request->match_sets[i].rssi_thold =
6710                                                 nla_get_s32(rssi);
6711                         }
6712                         i++;
6713                 }
6714
6715                 /* there was no other matchset, so the RSSI one is alone */
6716                 if (i == 0 && n_match_sets)
6717                         request->match_sets[0].rssi_thold = default_match_rssi;
6718
6719                 request->min_rssi_thold = INT_MAX;
6720                 for (i = 0; i < n_match_sets; i++)
6721                         request->min_rssi_thold =
6722                                 min(request->match_sets[i].rssi_thold,
6723                                     request->min_rssi_thold);
6724         } else {
6725                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6726         }
6727
6728         if (ie_len) {
6729                 request->ie_len = ie_len;
6730                 memcpy((void *)request->ie,
6731                        nla_data(attrs[NL80211_ATTR_IE]),
6732                        request->ie_len);
6733         }
6734
6735         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6736                 request->flags = nla_get_u32(
6737                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6738                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6739                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6740                         err = -EOPNOTSUPP;
6741                         goto out_free;
6742                 }
6743
6744                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6745                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6746
6747                         if (!wdev) /* must be net-detect */
6748                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6749
6750                         if (!(wiphy->features & flg)) {
6751                                 err = -EOPNOTSUPP;
6752                                 goto out_free;
6753                         }
6754
6755                         if (wdev && wdev->current_bss) {
6756                                 err = -EOPNOTSUPP;
6757                                 goto out_free;
6758                         }
6759
6760                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6761                                                        request->mac_addr_mask);
6762                         if (err)
6763                                 goto out_free;
6764                 }
6765         }
6766
6767         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6768                 request->delay =
6769                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6770
6771         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6772         if (err)
6773                 goto out_free;
6774
6775         request->scan_start = jiffies;
6776
6777         return request;
6778
6779 out_free:
6780         kfree(request);
6781         return ERR_PTR(err);
6782 }
6783
6784 static int nl80211_start_sched_scan(struct sk_buff *skb,
6785                                     struct genl_info *info)
6786 {
6787         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6788         struct net_device *dev = info->user_ptr[1];
6789         struct wireless_dev *wdev = dev->ieee80211_ptr;
6790         struct cfg80211_sched_scan_request *sched_scan_req;
6791         int err;
6792
6793         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6794             !rdev->ops->sched_scan_start)
6795                 return -EOPNOTSUPP;
6796
6797         if (rdev->sched_scan_req)
6798                 return -EINPROGRESS;
6799
6800         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6801                                                   info->attrs);
6802
6803         err = PTR_ERR_OR_ZERO(sched_scan_req);
6804         if (err)
6805                 goto out_err;
6806
6807         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6808         if (err)
6809                 goto out_free;
6810
6811         sched_scan_req->dev = dev;
6812         sched_scan_req->wiphy = &rdev->wiphy;
6813
6814         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6815                 sched_scan_req->owner_nlportid = info->snd_portid;
6816
6817         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6818
6819         nl80211_send_sched_scan(rdev, dev,
6820                                 NL80211_CMD_START_SCHED_SCAN);
6821         return 0;
6822
6823 out_free:
6824         kfree(sched_scan_req);
6825 out_err:
6826         return err;
6827 }
6828
6829 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6830                                    struct genl_info *info)
6831 {
6832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6833
6834         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6835             !rdev->ops->sched_scan_stop)
6836                 return -EOPNOTSUPP;
6837
6838         return __cfg80211_stop_sched_scan(rdev, false);
6839 }
6840
6841 static int nl80211_start_radar_detection(struct sk_buff *skb,
6842                                          struct genl_info *info)
6843 {
6844         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6845         struct net_device *dev = info->user_ptr[1];
6846         struct wireless_dev *wdev = dev->ieee80211_ptr;
6847         struct cfg80211_chan_def chandef;
6848         enum nl80211_dfs_regions dfs_region;
6849         unsigned int cac_time_ms;
6850         int err;
6851
6852         dfs_region = reg_get_dfs_region(wdev->wiphy);
6853         if (dfs_region == NL80211_DFS_UNSET)
6854                 return -EINVAL;
6855
6856         err = nl80211_parse_chandef(rdev, info, &chandef);
6857         if (err)
6858                 return err;
6859
6860         if (netif_carrier_ok(dev))
6861                 return -EBUSY;
6862
6863         if (wdev->cac_started)
6864                 return -EBUSY;
6865
6866         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6867                                             wdev->iftype);
6868         if (err < 0)
6869                 return err;
6870
6871         if (err == 0)
6872                 return -EINVAL;
6873
6874         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6875                 return -EINVAL;
6876
6877         if (!rdev->ops->start_radar_detection)
6878                 return -EOPNOTSUPP;
6879
6880         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6881         if (WARN_ON(!cac_time_ms))
6882                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6883
6884         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6885         if (!err) {
6886                 wdev->chandef = chandef;
6887                 wdev->cac_started = true;
6888                 wdev->cac_start_time = jiffies;
6889                 wdev->cac_time_ms = cac_time_ms;
6890         }
6891         return err;
6892 }
6893
6894 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6895 {
6896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6897         struct net_device *dev = info->user_ptr[1];
6898         struct wireless_dev *wdev = dev->ieee80211_ptr;
6899         struct cfg80211_csa_settings params;
6900         /* csa_attrs is defined static to avoid waste of stack size - this
6901          * function is called under RTNL lock, so this should not be a problem.
6902          */
6903         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6904         int err;
6905         bool need_new_beacon = false;
6906         int len, i;
6907         u32 cs_count;
6908
6909         if (!rdev->ops->channel_switch ||
6910             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6911                 return -EOPNOTSUPP;
6912
6913         switch (dev->ieee80211_ptr->iftype) {
6914         case NL80211_IFTYPE_AP:
6915         case NL80211_IFTYPE_P2P_GO:
6916                 need_new_beacon = true;
6917
6918                 /* useless if AP is not running */
6919                 if (!wdev->beacon_interval)
6920                         return -ENOTCONN;
6921                 break;
6922         case NL80211_IFTYPE_ADHOC:
6923                 if (!wdev->ssid_len)
6924                         return -ENOTCONN;
6925                 break;
6926         case NL80211_IFTYPE_MESH_POINT:
6927                 if (!wdev->mesh_id_len)
6928                         return -ENOTCONN;
6929                 break;
6930         default:
6931                 return -EOPNOTSUPP;
6932         }
6933
6934         memset(&params, 0, sizeof(params));
6935
6936         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6937             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6938                 return -EINVAL;
6939
6940         /* only important for AP, IBSS and mesh create IEs internally */
6941         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6942                 return -EINVAL;
6943
6944         /* Even though the attribute is u32, the specification says
6945          * u8, so let's make sure we don't overflow.
6946          */
6947         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6948         if (cs_count > 255)
6949                 return -EINVAL;
6950
6951         params.count = cs_count;
6952
6953         if (!need_new_beacon)
6954                 goto skip_beacons;
6955
6956         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6957         if (err)
6958                 return err;
6959
6960         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6961                                info->attrs[NL80211_ATTR_CSA_IES],
6962                                nl80211_policy);
6963         if (err)
6964                 return err;
6965
6966         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6967         if (err)
6968                 return err;
6969
6970         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6971                 return -EINVAL;
6972
6973         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6974         if (!len || (len % sizeof(u16)))
6975                 return -EINVAL;
6976
6977         params.n_counter_offsets_beacon = len / sizeof(u16);
6978         if (rdev->wiphy.max_num_csa_counters &&
6979             (params.n_counter_offsets_beacon >
6980              rdev->wiphy.max_num_csa_counters))
6981                 return -EINVAL;
6982
6983         params.counter_offsets_beacon =
6984                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6985
6986         /* sanity checks - counters should fit and be the same */
6987         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6988                 u16 offset = params.counter_offsets_beacon[i];
6989
6990                 if (offset >= params.beacon_csa.tail_len)
6991                         return -EINVAL;
6992
6993                 if (params.beacon_csa.tail[offset] != params.count)
6994                         return -EINVAL;
6995         }
6996
6997         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6998                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6999                 if (!len || (len % sizeof(u16)))
7000                         return -EINVAL;
7001
7002                 params.n_counter_offsets_presp = len / sizeof(u16);
7003                 if (rdev->wiphy.max_num_csa_counters &&
7004                     (params.n_counter_offsets_beacon >
7005                      rdev->wiphy.max_num_csa_counters))
7006                         return -EINVAL;
7007
7008                 params.counter_offsets_presp =
7009                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7010
7011                 /* sanity checks - counters should fit and be the same */
7012                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7013                         u16 offset = params.counter_offsets_presp[i];
7014
7015                         if (offset >= params.beacon_csa.probe_resp_len)
7016                                 return -EINVAL;
7017
7018                         if (params.beacon_csa.probe_resp[offset] !=
7019                             params.count)
7020                                 return -EINVAL;
7021                 }
7022         }
7023
7024 skip_beacons:
7025         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7026         if (err)
7027                 return err;
7028
7029         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7030                                            wdev->iftype))
7031                 return -EINVAL;
7032
7033         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7034                                             &params.chandef,
7035                                             wdev->iftype);
7036         if (err < 0)
7037                 return err;
7038
7039         if (err > 0)
7040                 params.radar_required = true;
7041
7042         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7043                 params.block_tx = true;
7044
7045         wdev_lock(wdev);
7046         err = rdev_channel_switch(rdev, dev, &params);
7047         wdev_unlock(wdev);
7048
7049         return err;
7050 }
7051
7052 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7053                             u32 seq, int flags,
7054                             struct cfg80211_registered_device *rdev,
7055                             struct wireless_dev *wdev,
7056                             struct cfg80211_internal_bss *intbss)
7057 {
7058         struct cfg80211_bss *res = &intbss->pub;
7059         const struct cfg80211_bss_ies *ies;
7060         void *hdr;
7061         struct nlattr *bss;
7062
7063         ASSERT_WDEV_LOCK(wdev);
7064
7065         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7066                              NL80211_CMD_NEW_SCAN_RESULTS);
7067         if (!hdr)
7068                 return -1;
7069
7070         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7071
7072         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7073                 goto nla_put_failure;
7074         if (wdev->netdev &&
7075             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7076                 goto nla_put_failure;
7077         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7078                               NL80211_ATTR_PAD))
7079                 goto nla_put_failure;
7080
7081         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7082         if (!bss)
7083                 goto nla_put_failure;
7084         if ((!is_zero_ether_addr(res->bssid) &&
7085              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7086                 goto nla_put_failure;
7087
7088         rcu_read_lock();
7089         /* indicate whether we have probe response data or not */
7090         if (rcu_access_pointer(res->proberesp_ies) &&
7091             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7092                 goto fail_unlock_rcu;
7093
7094         /* this pointer prefers to be pointed to probe response data
7095          * but is always valid
7096          */
7097         ies = rcu_dereference(res->ies);
7098         if (ies) {
7099                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7100                                       NL80211_BSS_PAD))
7101                         goto fail_unlock_rcu;
7102                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7103                                         ies->len, ies->data))
7104                         goto fail_unlock_rcu;
7105         }
7106
7107         /* and this pointer is always (unless driver didn't know) beacon data */
7108         ies = rcu_dereference(res->beacon_ies);
7109         if (ies && ies->from_beacon) {
7110                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7111                                       NL80211_BSS_PAD))
7112                         goto fail_unlock_rcu;
7113                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7114                                         ies->len, ies->data))
7115                         goto fail_unlock_rcu;
7116         }
7117         rcu_read_unlock();
7118
7119         if (res->beacon_interval &&
7120             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7121                 goto nla_put_failure;
7122         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7123             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7124             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7125             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7126                         jiffies_to_msecs(jiffies - intbss->ts)))
7127                 goto nla_put_failure;
7128
7129         if (intbss->parent_tsf &&
7130             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7131                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7132              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7133                      intbss->parent_bssid)))
7134                 goto nla_put_failure;
7135
7136         if (intbss->ts_boottime &&
7137             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7138                               intbss->ts_boottime, NL80211_BSS_PAD))
7139                 goto nla_put_failure;
7140
7141         switch (rdev->wiphy.signal_type) {
7142         case CFG80211_SIGNAL_TYPE_MBM:
7143                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7144                         goto nla_put_failure;
7145                 break;
7146         case CFG80211_SIGNAL_TYPE_UNSPEC:
7147                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7148                         goto nla_put_failure;
7149                 break;
7150         default:
7151                 break;
7152         }
7153
7154         switch (wdev->iftype) {
7155         case NL80211_IFTYPE_P2P_CLIENT:
7156         case NL80211_IFTYPE_STATION:
7157                 if (intbss == wdev->current_bss &&
7158                     nla_put_u32(msg, NL80211_BSS_STATUS,
7159                                 NL80211_BSS_STATUS_ASSOCIATED))
7160                         goto nla_put_failure;
7161                 break;
7162         case NL80211_IFTYPE_ADHOC:
7163                 if (intbss == wdev->current_bss &&
7164                     nla_put_u32(msg, NL80211_BSS_STATUS,
7165                                 NL80211_BSS_STATUS_IBSS_JOINED))
7166                         goto nla_put_failure;
7167                 break;
7168         default:
7169                 break;
7170         }
7171
7172         nla_nest_end(msg, bss);
7173
7174         genlmsg_end(msg, hdr);
7175         return 0;
7176
7177  fail_unlock_rcu:
7178         rcu_read_unlock();
7179  nla_put_failure:
7180         genlmsg_cancel(msg, hdr);
7181         return -EMSGSIZE;
7182 }
7183
7184 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7185 {
7186         struct cfg80211_registered_device *rdev;
7187         struct cfg80211_internal_bss *scan;
7188         struct wireless_dev *wdev;
7189         int start = cb->args[2], idx = 0;
7190         int err;
7191
7192         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7193         if (err)
7194                 return err;
7195
7196         wdev_lock(wdev);
7197         spin_lock_bh(&rdev->bss_lock);
7198         cfg80211_bss_expire(rdev);
7199
7200         cb->seq = rdev->bss_generation;
7201
7202         list_for_each_entry(scan, &rdev->bss_list, list) {
7203                 if (++idx <= start)
7204                         continue;
7205                 if (nl80211_send_bss(skb, cb,
7206                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7207                                 rdev, wdev, scan) < 0) {
7208                         idx--;
7209                         break;
7210                 }
7211         }
7212
7213         spin_unlock_bh(&rdev->bss_lock);
7214         wdev_unlock(wdev);
7215
7216         cb->args[2] = idx;
7217         nl80211_finish_wdev_dump(rdev);
7218
7219         return skb->len;
7220 }
7221
7222 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7223                                int flags, struct net_device *dev,
7224                                bool allow_radio_stats,
7225                                struct survey_info *survey)
7226 {
7227         void *hdr;
7228         struct nlattr *infoattr;
7229
7230         /* skip radio stats if userspace didn't request them */
7231         if (!survey->channel && !allow_radio_stats)
7232                 return 0;
7233
7234         hdr = nl80211hdr_put(msg, portid, seq, flags,
7235                              NL80211_CMD_NEW_SURVEY_RESULTS);
7236         if (!hdr)
7237                 return -ENOMEM;
7238
7239         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7240                 goto nla_put_failure;
7241
7242         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7243         if (!infoattr)
7244                 goto nla_put_failure;
7245
7246         if (survey->channel &&
7247             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7248                         survey->channel->center_freq))
7249                 goto nla_put_failure;
7250
7251         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7252             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7253                 goto nla_put_failure;
7254         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7255             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7256                 goto nla_put_failure;
7257         if ((survey->filled & SURVEY_INFO_TIME) &&
7258             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7259                         survey->time, NL80211_SURVEY_INFO_PAD))
7260                 goto nla_put_failure;
7261         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7262             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7263                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7264                 goto nla_put_failure;
7265         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7266             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7267                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7268                 goto nla_put_failure;
7269         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7270             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7271                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7272                 goto nla_put_failure;
7273         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7274             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7275                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7276                 goto nla_put_failure;
7277         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7278             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7279                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7280                 goto nla_put_failure;
7281
7282         nla_nest_end(msg, infoattr);
7283
7284         genlmsg_end(msg, hdr);
7285         return 0;
7286
7287  nla_put_failure:
7288         genlmsg_cancel(msg, hdr);
7289         return -EMSGSIZE;
7290 }
7291
7292 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7293 {
7294         struct survey_info survey;
7295         struct cfg80211_registered_device *rdev;
7296         struct wireless_dev *wdev;
7297         int survey_idx = cb->args[2];
7298         int res;
7299         bool radio_stats;
7300
7301         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7302         if (res)
7303                 return res;
7304
7305         /* prepare_wdev_dump parsed the attributes */
7306         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7307
7308         if (!wdev->netdev) {
7309                 res = -EINVAL;
7310                 goto out_err;
7311         }
7312
7313         if (!rdev->ops->dump_survey) {
7314                 res = -EOPNOTSUPP;
7315                 goto out_err;
7316         }
7317
7318         while (1) {
7319                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7320                 if (res == -ENOENT)
7321                         break;
7322                 if (res)
7323                         goto out_err;
7324
7325                 /* don't send disabled channels, but do send non-channel data */
7326                 if (survey.channel &&
7327                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7328                         survey_idx++;
7329                         continue;
7330                 }
7331
7332                 if (nl80211_send_survey(skb,
7333                                 NETLINK_CB(cb->skb).portid,
7334                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7335                                 wdev->netdev, radio_stats, &survey) < 0)
7336                         goto out;
7337                 survey_idx++;
7338         }
7339
7340  out:
7341         cb->args[2] = survey_idx;
7342         res = skb->len;
7343  out_err:
7344         nl80211_finish_wdev_dump(rdev);
7345         return res;
7346 }
7347
7348 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7349 {
7350         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7351                                   NL80211_WPA_VERSION_2));
7352 }
7353
7354 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7355 {
7356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7357         struct net_device *dev = info->user_ptr[1];
7358         struct ieee80211_channel *chan;
7359         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7360         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7361         enum nl80211_auth_type auth_type;
7362         struct key_parse key;
7363         bool local_state_change;
7364
7365         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7366                 return -EINVAL;
7367
7368         if (!info->attrs[NL80211_ATTR_MAC])
7369                 return -EINVAL;
7370
7371         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7372                 return -EINVAL;
7373
7374         if (!info->attrs[NL80211_ATTR_SSID])
7375                 return -EINVAL;
7376
7377         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7378                 return -EINVAL;
7379
7380         err = nl80211_parse_key(info, &key);
7381         if (err)
7382                 return err;
7383
7384         if (key.idx >= 0) {
7385                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7386                         return -EINVAL;
7387                 if (!key.p.key || !key.p.key_len)
7388                         return -EINVAL;
7389                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7390                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7391                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7392                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7393                         return -EINVAL;
7394                 if (key.idx > 3)
7395                         return -EINVAL;
7396         } else {
7397                 key.p.key_len = 0;
7398                 key.p.key = NULL;
7399         }
7400
7401         if (key.idx >= 0) {
7402                 int i;
7403                 bool ok = false;
7404
7405                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7406                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7407                                 ok = true;
7408                                 break;
7409                         }
7410                 }
7411                 if (!ok)
7412                         return -EINVAL;
7413         }
7414
7415         if (!rdev->ops->auth)
7416                 return -EOPNOTSUPP;
7417
7418         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7419             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7420                 return -EOPNOTSUPP;
7421
7422         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7423         chan = nl80211_get_valid_chan(&rdev->wiphy,
7424                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7425         if (!chan)
7426                 return -EINVAL;
7427
7428         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7429         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7430
7431         if (info->attrs[NL80211_ATTR_IE]) {
7432                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7433                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7434         }
7435
7436         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7437         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7438                 return -EINVAL;
7439
7440         if (auth_type == NL80211_AUTHTYPE_SAE &&
7441             !info->attrs[NL80211_ATTR_SAE_DATA])
7442                 return -EINVAL;
7443
7444         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7445                 if (auth_type != NL80211_AUTHTYPE_SAE)
7446                         return -EINVAL;
7447                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7448                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7449                 /* need to include at least Auth Transaction and Status Code */
7450                 if (sae_data_len < 4)
7451                         return -EINVAL;
7452         }
7453
7454         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7455
7456         /*
7457          * Since we no longer track auth state, ignore
7458          * requests to only change local state.
7459          */
7460         if (local_state_change)
7461                 return 0;
7462
7463         wdev_lock(dev->ieee80211_ptr);
7464         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7465                                  ssid, ssid_len, ie, ie_len,
7466                                  key.p.key, key.p.key_len, key.idx,
7467                                  sae_data, sae_data_len);
7468         wdev_unlock(dev->ieee80211_ptr);
7469         return err;
7470 }
7471
7472 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7473                                    struct genl_info *info,
7474                                    struct cfg80211_crypto_settings *settings,
7475                                    int cipher_limit)
7476 {
7477         memset(settings, 0, sizeof(*settings));
7478
7479         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7480
7481         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7482                 u16 proto;
7483
7484                 proto = nla_get_u16(
7485                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7486                 settings->control_port_ethertype = cpu_to_be16(proto);
7487                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7488                     proto != ETH_P_PAE)
7489                         return -EINVAL;
7490                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7491                         settings->control_port_no_encrypt = true;
7492         } else
7493                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7494
7495         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7496                 void *data;
7497                 int len, i;
7498
7499                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7500                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7501                 settings->n_ciphers_pairwise = len / sizeof(u32);
7502
7503                 if (len % sizeof(u32))
7504                         return -EINVAL;
7505
7506                 if (settings->n_ciphers_pairwise > cipher_limit)
7507                         return -EINVAL;
7508
7509                 memcpy(settings->ciphers_pairwise, data, len);
7510
7511                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7512                         if (!cfg80211_supported_cipher_suite(
7513                                         &rdev->wiphy,
7514                                         settings->ciphers_pairwise[i]))
7515                                 return -EINVAL;
7516         }
7517
7518         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7519                 settings->cipher_group =
7520                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7521                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7522                                                      settings->cipher_group))
7523                         return -EINVAL;
7524         }
7525
7526         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7527                 settings->wpa_versions =
7528                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7529                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7530                         return -EINVAL;
7531         }
7532
7533         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7534                 void *data;
7535                 int len;
7536
7537                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7538                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7539                 settings->n_akm_suites = len / sizeof(u32);
7540
7541                 if (len % sizeof(u32))
7542                         return -EINVAL;
7543
7544                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7545                         return -EINVAL;
7546
7547                 memcpy(settings->akm_suites, data, len);
7548         }
7549
7550         return 0;
7551 }
7552
7553 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7554 {
7555         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7556         struct net_device *dev = info->user_ptr[1];
7557         struct ieee80211_channel *chan;
7558         struct cfg80211_assoc_request req = {};
7559         const u8 *bssid, *ssid;
7560         int err, ssid_len = 0;
7561
7562         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7563                 return -EINVAL;
7564
7565         if (!info->attrs[NL80211_ATTR_MAC] ||
7566             !info->attrs[NL80211_ATTR_SSID] ||
7567             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7568                 return -EINVAL;
7569
7570         if (!rdev->ops->assoc)
7571                 return -EOPNOTSUPP;
7572
7573         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7574             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7575                 return -EOPNOTSUPP;
7576
7577         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7578
7579         chan = nl80211_get_valid_chan(&rdev->wiphy,
7580                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7581         if (!chan)
7582                 return -EINVAL;
7583
7584         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7585         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7586
7587         if (info->attrs[NL80211_ATTR_IE]) {
7588                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7589                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7590         }
7591
7592         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7593                 enum nl80211_mfp mfp =
7594                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7595                 if (mfp == NL80211_MFP_REQUIRED)
7596                         req.use_mfp = true;
7597                 else if (mfp != NL80211_MFP_NO)
7598                         return -EINVAL;
7599         }
7600
7601         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7602                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7603
7604         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7605                 req.flags |= ASSOC_REQ_DISABLE_HT;
7606
7607         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7608                 memcpy(&req.ht_capa_mask,
7609                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7610                        sizeof(req.ht_capa_mask));
7611
7612         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7613                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7614                         return -EINVAL;
7615                 memcpy(&req.ht_capa,
7616                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7617                        sizeof(req.ht_capa));
7618         }
7619
7620         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7621                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7622
7623         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7624                 memcpy(&req.vht_capa_mask,
7625                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7626                        sizeof(req.vht_capa_mask));
7627
7628         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7629                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7630                         return -EINVAL;
7631                 memcpy(&req.vht_capa,
7632                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7633                        sizeof(req.vht_capa));
7634         }
7635
7636         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7637                 if (!((rdev->wiphy.features &
7638                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7639                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7640                     !wiphy_ext_feature_isset(&rdev->wiphy,
7641                                              NL80211_EXT_FEATURE_RRM))
7642                         return -EINVAL;
7643                 req.flags |= ASSOC_REQ_USE_RRM;
7644         }
7645
7646         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7647         if (!err) {
7648                 wdev_lock(dev->ieee80211_ptr);
7649                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7650                                           ssid, ssid_len, &req);
7651                 wdev_unlock(dev->ieee80211_ptr);
7652         }
7653
7654         return err;
7655 }
7656
7657 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7658 {
7659         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7660         struct net_device *dev = info->user_ptr[1];
7661         const u8 *ie = NULL, *bssid;
7662         int ie_len = 0, err;
7663         u16 reason_code;
7664         bool local_state_change;
7665
7666         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7667                 return -EINVAL;
7668
7669         if (!info->attrs[NL80211_ATTR_MAC])
7670                 return -EINVAL;
7671
7672         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7673                 return -EINVAL;
7674
7675         if (!rdev->ops->deauth)
7676                 return -EOPNOTSUPP;
7677
7678         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7679             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7680                 return -EOPNOTSUPP;
7681
7682         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7683
7684         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7685         if (reason_code == 0) {
7686                 /* Reason Code 0 is reserved */
7687                 return -EINVAL;
7688         }
7689
7690         if (info->attrs[NL80211_ATTR_IE]) {
7691                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7692                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7693         }
7694
7695         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7696
7697         wdev_lock(dev->ieee80211_ptr);
7698         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7699                                    local_state_change);
7700         wdev_unlock(dev->ieee80211_ptr);
7701         return err;
7702 }
7703
7704 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7705 {
7706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7707         struct net_device *dev = info->user_ptr[1];
7708         const u8 *ie = NULL, *bssid;
7709         int ie_len = 0, err;
7710         u16 reason_code;
7711         bool local_state_change;
7712
7713         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7714                 return -EINVAL;
7715
7716         if (!info->attrs[NL80211_ATTR_MAC])
7717                 return -EINVAL;
7718
7719         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7720                 return -EINVAL;
7721
7722         if (!rdev->ops->disassoc)
7723                 return -EOPNOTSUPP;
7724
7725         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7726             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7727                 return -EOPNOTSUPP;
7728
7729         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7730
7731         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7732         if (reason_code == 0) {
7733                 /* Reason Code 0 is reserved */
7734                 return -EINVAL;
7735         }
7736
7737         if (info->attrs[NL80211_ATTR_IE]) {
7738                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7739                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7740         }
7741
7742         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7743
7744         wdev_lock(dev->ieee80211_ptr);
7745         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7746                                      local_state_change);
7747         wdev_unlock(dev->ieee80211_ptr);
7748         return err;
7749 }
7750
7751 static bool
7752 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7753                          int mcast_rate[NUM_NL80211_BANDS],
7754                          int rateval)
7755 {
7756         struct wiphy *wiphy = &rdev->wiphy;
7757         bool found = false;
7758         int band, i;
7759
7760         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7761                 struct ieee80211_supported_band *sband;
7762
7763                 sband = wiphy->bands[band];
7764                 if (!sband)
7765                         continue;
7766
7767                 for (i = 0; i < sband->n_bitrates; i++) {
7768                         if (sband->bitrates[i].bitrate == rateval) {
7769                                 mcast_rate[band] = i + 1;
7770                                 found = true;
7771                                 break;
7772                         }
7773                 }
7774         }
7775
7776         return found;
7777 }
7778
7779 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7780 {
7781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7782         struct net_device *dev = info->user_ptr[1];
7783         struct cfg80211_ibss_params ibss;
7784         struct wiphy *wiphy;
7785         struct cfg80211_cached_keys *connkeys = NULL;
7786         int err;
7787
7788         memset(&ibss, 0, sizeof(ibss));
7789
7790         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7791                 return -EINVAL;
7792
7793         if (!info->attrs[NL80211_ATTR_SSID] ||
7794             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7795                 return -EINVAL;
7796
7797         ibss.beacon_interval = 100;
7798
7799         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
7800                 ibss.beacon_interval =
7801                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7802
7803         err = cfg80211_validate_beacon_int(rdev, ibss.beacon_interval);
7804         if (err)
7805                 return err;
7806
7807         if (!rdev->ops->join_ibss)
7808                 return -EOPNOTSUPP;
7809
7810         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7811                 return -EOPNOTSUPP;
7812
7813         wiphy = &rdev->wiphy;
7814
7815         if (info->attrs[NL80211_ATTR_MAC]) {
7816                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7817
7818                 if (!is_valid_ether_addr(ibss.bssid))
7819                         return -EINVAL;
7820         }
7821         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7822         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7823
7824         if (info->attrs[NL80211_ATTR_IE]) {
7825                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7826                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7827         }
7828
7829         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7830         if (err)
7831                 return err;
7832
7833         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7834                                      NL80211_IFTYPE_ADHOC))
7835                 return -EINVAL;
7836
7837         switch (ibss.chandef.width) {
7838         case NL80211_CHAN_WIDTH_5:
7839         case NL80211_CHAN_WIDTH_10:
7840         case NL80211_CHAN_WIDTH_20_NOHT:
7841                 break;
7842         case NL80211_CHAN_WIDTH_20:
7843         case NL80211_CHAN_WIDTH_40:
7844                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7845                         return -EINVAL;
7846                 break;
7847         case NL80211_CHAN_WIDTH_80:
7848         case NL80211_CHAN_WIDTH_80P80:
7849         case NL80211_CHAN_WIDTH_160:
7850                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7851                         return -EINVAL;
7852                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7853                                              NL80211_EXT_FEATURE_VHT_IBSS))
7854                         return -EINVAL;
7855                 break;
7856         default:
7857                 return -EINVAL;
7858         }
7859
7860         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7861         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7862
7863         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7864                 u8 *rates =
7865                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7866                 int n_rates =
7867                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7868                 struct ieee80211_supported_band *sband =
7869                         wiphy->bands[ibss.chandef.chan->band];
7870
7871                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7872                                              &ibss.basic_rates);
7873                 if (err)
7874                         return err;
7875         }
7876
7877         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7878                 memcpy(&ibss.ht_capa_mask,
7879                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7880                        sizeof(ibss.ht_capa_mask));
7881
7882         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7883                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7884                         return -EINVAL;
7885                 memcpy(&ibss.ht_capa,
7886                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7887                        sizeof(ibss.ht_capa));
7888         }
7889
7890         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7891             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7892                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7893                 return -EINVAL;
7894
7895         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7896                 bool no_ht = false;
7897
7898                 connkeys = nl80211_parse_connkeys(rdev,
7899                                           info->attrs[NL80211_ATTR_KEYS],
7900                                           &no_ht);
7901                 if (IS_ERR(connkeys))
7902                         return PTR_ERR(connkeys);
7903
7904                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7905                     no_ht) {
7906                         kzfree(connkeys);
7907                         return -EINVAL;
7908                 }
7909         }
7910
7911         ibss.control_port =
7912                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7913
7914         ibss.userspace_handles_dfs =
7915                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7916
7917         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7918         if (err)
7919                 kzfree(connkeys);
7920         return err;
7921 }
7922
7923 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7924 {
7925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7926         struct net_device *dev = info->user_ptr[1];
7927
7928         if (!rdev->ops->leave_ibss)
7929                 return -EOPNOTSUPP;
7930
7931         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7932                 return -EOPNOTSUPP;
7933
7934         return cfg80211_leave_ibss(rdev, dev, false);
7935 }
7936
7937 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7938 {
7939         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7940         struct net_device *dev = info->user_ptr[1];
7941         int mcast_rate[NUM_NL80211_BANDS];
7942         u32 nla_rate;
7943         int err;
7944
7945         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7946             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7947             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7948                 return -EOPNOTSUPP;
7949
7950         if (!rdev->ops->set_mcast_rate)
7951                 return -EOPNOTSUPP;
7952
7953         memset(mcast_rate, 0, sizeof(mcast_rate));
7954
7955         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7956                 return -EINVAL;
7957
7958         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7959         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7960                 return -EINVAL;
7961
7962         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7963
7964         return err;
7965 }
7966
7967 static struct sk_buff *
7968 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7969                             struct wireless_dev *wdev, int approxlen,
7970                             u32 portid, u32 seq, enum nl80211_commands cmd,
7971                             enum nl80211_attrs attr,
7972                             const struct nl80211_vendor_cmd_info *info,
7973                             gfp_t gfp)
7974 {
7975         struct sk_buff *skb;
7976         void *hdr;
7977         struct nlattr *data;
7978
7979         skb = nlmsg_new(approxlen + 100, gfp);
7980         if (!skb)
7981                 return NULL;
7982
7983         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7984         if (!hdr) {
7985                 kfree_skb(skb);
7986                 return NULL;
7987         }
7988
7989         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7990                 goto nla_put_failure;
7991
7992         if (info) {
7993                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7994                                 info->vendor_id))
7995                         goto nla_put_failure;
7996                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7997                                 info->subcmd))
7998                         goto nla_put_failure;
7999         }
8000
8001         if (wdev) {
8002                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8003                                       wdev_id(wdev), NL80211_ATTR_PAD))
8004                         goto nla_put_failure;
8005                 if (wdev->netdev &&
8006                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8007                                 wdev->netdev->ifindex))
8008                         goto nla_put_failure;
8009         }
8010
8011         data = nla_nest_start(skb, attr);
8012
8013         ((void **)skb->cb)[0] = rdev;
8014         ((void **)skb->cb)[1] = hdr;
8015         ((void **)skb->cb)[2] = data;
8016
8017         return skb;
8018
8019  nla_put_failure:
8020         kfree_skb(skb);
8021         return NULL;
8022 }
8023
8024 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8025                                            struct wireless_dev *wdev,
8026                                            enum nl80211_commands cmd,
8027                                            enum nl80211_attrs attr,
8028                                            int vendor_event_idx,
8029                                            int approxlen, gfp_t gfp)
8030 {
8031         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8032         const struct nl80211_vendor_cmd_info *info;
8033
8034         switch (cmd) {
8035         case NL80211_CMD_TESTMODE:
8036                 if (WARN_ON(vendor_event_idx != -1))
8037                         return NULL;
8038                 info = NULL;
8039                 break;
8040         case NL80211_CMD_VENDOR:
8041                 if (WARN_ON(vendor_event_idx < 0 ||
8042                             vendor_event_idx >= wiphy->n_vendor_events))
8043                         return NULL;
8044                 info = &wiphy->vendor_events[vendor_event_idx];
8045                 break;
8046         default:
8047                 WARN_ON(1);
8048                 return NULL;
8049         }
8050
8051         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8052                                            cmd, attr, info, gfp);
8053 }
8054 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8055
8056 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8057 {
8058         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8059         void *hdr = ((void **)skb->cb)[1];
8060         struct nlattr *data = ((void **)skb->cb)[2];
8061         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8062
8063         /* clear CB data for netlink core to own from now on */
8064         memset(skb->cb, 0, sizeof(skb->cb));
8065
8066         nla_nest_end(skb, data);
8067         genlmsg_end(skb, hdr);
8068
8069         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8070                 mcgrp = NL80211_MCGRP_VENDOR;
8071
8072         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8073                                 mcgrp, gfp);
8074 }
8075 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8076
8077 #ifdef CONFIG_NL80211_TESTMODE
8078 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8079 {
8080         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8081         struct wireless_dev *wdev =
8082                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8083         int err;
8084
8085         if (!rdev->ops->testmode_cmd)
8086                 return -EOPNOTSUPP;
8087
8088         if (IS_ERR(wdev)) {
8089                 err = PTR_ERR(wdev);
8090                 if (err != -EINVAL)
8091                         return err;
8092                 wdev = NULL;
8093         } else if (wdev->wiphy != &rdev->wiphy) {
8094                 return -EINVAL;
8095         }
8096
8097         if (!info->attrs[NL80211_ATTR_TESTDATA])
8098                 return -EINVAL;
8099
8100         rdev->cur_cmd_info = info;
8101         err = rdev_testmode_cmd(rdev, wdev,
8102                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8103                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8104         rdev->cur_cmd_info = NULL;
8105
8106         return err;
8107 }
8108
8109 static int nl80211_testmode_dump(struct sk_buff *skb,
8110                                  struct netlink_callback *cb)
8111 {
8112         struct cfg80211_registered_device *rdev;
8113         int err;
8114         long phy_idx;
8115         void *data = NULL;
8116         int data_len = 0;
8117
8118         rtnl_lock();
8119
8120         if (cb->args[0]) {
8121                 /*
8122                  * 0 is a valid index, but not valid for args[0],
8123                  * so we need to offset by 1.
8124                  */
8125                 phy_idx = cb->args[0] - 1;
8126         } else {
8127                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8128                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8129                                   nl80211_policy);
8130                 if (err)
8131                         goto out_err;
8132
8133                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8134                                                   nl80211_fam.attrbuf);
8135                 if (IS_ERR(rdev)) {
8136                         err = PTR_ERR(rdev);
8137                         goto out_err;
8138                 }
8139                 phy_idx = rdev->wiphy_idx;
8140                 rdev = NULL;
8141
8142                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8143                         cb->args[1] =
8144                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8145         }
8146
8147         if (cb->args[1]) {
8148                 data = nla_data((void *)cb->args[1]);
8149                 data_len = nla_len((void *)cb->args[1]);
8150         }
8151
8152         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8153         if (!rdev) {
8154                 err = -ENOENT;
8155                 goto out_err;
8156         }
8157
8158         if (!rdev->ops->testmode_dump) {
8159                 err = -EOPNOTSUPP;
8160                 goto out_err;
8161         }
8162
8163         while (1) {
8164                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8165                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8166                                            NL80211_CMD_TESTMODE);
8167                 struct nlattr *tmdata;
8168
8169                 if (!hdr)
8170                         break;
8171
8172                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8173                         genlmsg_cancel(skb, hdr);
8174                         break;
8175                 }
8176
8177                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8178                 if (!tmdata) {
8179                         genlmsg_cancel(skb, hdr);
8180                         break;
8181                 }
8182                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8183                 nla_nest_end(skb, tmdata);
8184
8185                 if (err == -ENOBUFS || err == -ENOENT) {
8186                         genlmsg_cancel(skb, hdr);
8187                         break;
8188                 } else if (err) {
8189                         genlmsg_cancel(skb, hdr);
8190                         goto out_err;
8191                 }
8192
8193                 genlmsg_end(skb, hdr);
8194         }
8195
8196         err = skb->len;
8197         /* see above */
8198         cb->args[0] = phy_idx + 1;
8199  out_err:
8200         rtnl_unlock();
8201         return err;
8202 }
8203 #endif
8204
8205 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8206 {
8207         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8208         struct net_device *dev = info->user_ptr[1];
8209         struct cfg80211_connect_params connect;
8210         struct wiphy *wiphy;
8211         struct cfg80211_cached_keys *connkeys = NULL;
8212         int err;
8213
8214         memset(&connect, 0, sizeof(connect));
8215
8216         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8217                 return -EINVAL;
8218
8219         if (!info->attrs[NL80211_ATTR_SSID] ||
8220             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8221                 return -EINVAL;
8222
8223         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8224                 connect.auth_type =
8225                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8226                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8227                                              NL80211_CMD_CONNECT))
8228                         return -EINVAL;
8229         } else
8230                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8231
8232         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8233
8234         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8235                                       NL80211_MAX_NR_CIPHER_SUITES);
8236         if (err)
8237                 return err;
8238
8239         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8240             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8241                 return -EOPNOTSUPP;
8242
8243         wiphy = &rdev->wiphy;
8244
8245         connect.bg_scan_period = -1;
8246         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8247                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8248                 connect.bg_scan_period =
8249                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8250         }
8251
8252         if (info->attrs[NL80211_ATTR_MAC])
8253                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8254         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8255                 connect.bssid_hint =
8256                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8257         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8258         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8259
8260         if (info->attrs[NL80211_ATTR_IE]) {
8261                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8262                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8263         }
8264
8265         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8266                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8267                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8268                     connect.mfp != NL80211_MFP_NO)
8269                         return -EINVAL;
8270         } else {
8271                 connect.mfp = NL80211_MFP_NO;
8272         }
8273
8274         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8275                 connect.prev_bssid =
8276                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8277
8278         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8279                 connect.channel = nl80211_get_valid_chan(
8280                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8281                 if (!connect.channel)
8282                         return -EINVAL;
8283         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8284                 connect.channel_hint = nl80211_get_valid_chan(
8285                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8286                 if (!connect.channel_hint)
8287                         return -EINVAL;
8288         }
8289
8290         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8291                 connkeys = nl80211_parse_connkeys(rdev,
8292                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8293                 if (IS_ERR(connkeys))
8294                         return PTR_ERR(connkeys);
8295         }
8296
8297         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8298                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8299
8300         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8301                 memcpy(&connect.ht_capa_mask,
8302                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8303                        sizeof(connect.ht_capa_mask));
8304
8305         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8306                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8307                         kzfree(connkeys);
8308                         return -EINVAL;
8309                 }
8310                 memcpy(&connect.ht_capa,
8311                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8312                        sizeof(connect.ht_capa));
8313         }
8314
8315         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8316                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8317
8318         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8319                 memcpy(&connect.vht_capa_mask,
8320                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8321                        sizeof(connect.vht_capa_mask));
8322
8323         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8324                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8325                         kzfree(connkeys);
8326                         return -EINVAL;
8327                 }
8328                 memcpy(&connect.vht_capa,
8329                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8330                        sizeof(connect.vht_capa));
8331         }
8332
8333         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8334                 if (!((rdev->wiphy.features &
8335                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8336                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8337                     !wiphy_ext_feature_isset(&rdev->wiphy,
8338                                              NL80211_EXT_FEATURE_RRM)) {
8339                         kzfree(connkeys);
8340                         return -EINVAL;
8341                 }
8342                 connect.flags |= ASSOC_REQ_USE_RRM;
8343         }
8344
8345         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8346         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8347                 kzfree(connkeys);
8348                 return -EOPNOTSUPP;
8349         }
8350
8351         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8352                 /* bss selection makes no sense if bssid is set */
8353                 if (connect.bssid) {
8354                         kzfree(connkeys);
8355                         return -EINVAL;
8356                 }
8357
8358                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8359                                        wiphy, &connect.bss_select);
8360                 if (err) {
8361                         kzfree(connkeys);
8362                         return err;
8363                 }
8364         }
8365
8366         wdev_lock(dev->ieee80211_ptr);
8367         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8368                                connect.prev_bssid);
8369         wdev_unlock(dev->ieee80211_ptr);
8370         if (err)
8371                 kzfree(connkeys);
8372         return err;
8373 }
8374
8375 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8376 {
8377         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8378         struct net_device *dev = info->user_ptr[1];
8379         u16 reason;
8380         int ret;
8381
8382         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8383                 reason = WLAN_REASON_DEAUTH_LEAVING;
8384         else
8385                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8386
8387         if (reason == 0)
8388                 return -EINVAL;
8389
8390         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8391             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8392                 return -EOPNOTSUPP;
8393
8394         wdev_lock(dev->ieee80211_ptr);
8395         ret = cfg80211_disconnect(rdev, dev, reason, true);
8396         wdev_unlock(dev->ieee80211_ptr);
8397         return ret;
8398 }
8399
8400 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8401 {
8402         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8403         struct net *net;
8404         int err;
8405
8406         if (info->attrs[NL80211_ATTR_PID]) {
8407                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8408
8409                 net = get_net_ns_by_pid(pid);
8410         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8411                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8412
8413                 net = get_net_ns_by_fd(fd);
8414         } else {
8415                 return -EINVAL;
8416         }
8417
8418         if (IS_ERR(net))
8419                 return PTR_ERR(net);
8420
8421         err = 0;
8422
8423         /* check if anything to do */
8424         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8425                 err = cfg80211_switch_netns(rdev, net);
8426
8427         put_net(net);
8428         return err;
8429 }
8430
8431 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8432 {
8433         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8434         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8435                         struct cfg80211_pmksa *pmksa) = NULL;
8436         struct net_device *dev = info->user_ptr[1];
8437         struct cfg80211_pmksa pmksa;
8438
8439         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8440
8441         if (!info->attrs[NL80211_ATTR_MAC])
8442                 return -EINVAL;
8443
8444         if (!info->attrs[NL80211_ATTR_PMKID])
8445                 return -EINVAL;
8446
8447         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8448         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8449
8450         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8451             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8452                 return -EOPNOTSUPP;
8453
8454         switch (info->genlhdr->cmd) {
8455         case NL80211_CMD_SET_PMKSA:
8456                 rdev_ops = rdev->ops->set_pmksa;
8457                 break;
8458         case NL80211_CMD_DEL_PMKSA:
8459                 rdev_ops = rdev->ops->del_pmksa;
8460                 break;
8461         default:
8462                 WARN_ON(1);
8463                 break;
8464         }
8465
8466         if (!rdev_ops)
8467                 return -EOPNOTSUPP;
8468
8469         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8470 }
8471
8472 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8473 {
8474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8475         struct net_device *dev = info->user_ptr[1];
8476
8477         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8478             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8479                 return -EOPNOTSUPP;
8480
8481         if (!rdev->ops->flush_pmksa)
8482                 return -EOPNOTSUPP;
8483
8484         return rdev_flush_pmksa(rdev, dev);
8485 }
8486
8487 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8488 {
8489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8490         struct net_device *dev = info->user_ptr[1];
8491         u8 action_code, dialog_token;
8492         u32 peer_capability = 0;
8493         u16 status_code;
8494         u8 *peer;
8495         bool initiator;
8496
8497         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8498             !rdev->ops->tdls_mgmt)
8499                 return -EOPNOTSUPP;
8500
8501         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8502             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8503             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8504             !info->attrs[NL80211_ATTR_IE] ||
8505             !info->attrs[NL80211_ATTR_MAC])
8506                 return -EINVAL;
8507
8508         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8509         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8510         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8511         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8512         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8513         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8514                 peer_capability =
8515                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8516
8517         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8518                               dialog_token, status_code, peer_capability,
8519                               initiator,
8520                               nla_data(info->attrs[NL80211_ATTR_IE]),
8521                               nla_len(info->attrs[NL80211_ATTR_IE]));
8522 }
8523
8524 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8525 {
8526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8527         struct net_device *dev = info->user_ptr[1];
8528         enum nl80211_tdls_operation operation;
8529         u8 *peer;
8530
8531         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8532             !rdev->ops->tdls_oper)
8533                 return -EOPNOTSUPP;
8534
8535         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8536             !info->attrs[NL80211_ATTR_MAC])
8537                 return -EINVAL;
8538
8539         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8540         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8541
8542         return rdev_tdls_oper(rdev, dev, peer, operation);
8543 }
8544
8545 static int nl80211_remain_on_channel(struct sk_buff *skb,
8546                                      struct genl_info *info)
8547 {
8548         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8549         struct wireless_dev *wdev = info->user_ptr[1];
8550         struct cfg80211_chan_def chandef;
8551         struct sk_buff *msg;
8552         void *hdr;
8553         u64 cookie;
8554         u32 duration;
8555         int err;
8556
8557         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8558             !info->attrs[NL80211_ATTR_DURATION])
8559                 return -EINVAL;
8560
8561         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8562
8563         if (!rdev->ops->remain_on_channel ||
8564             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8565                 return -EOPNOTSUPP;
8566
8567         /*
8568          * We should be on that channel for at least a minimum amount of
8569          * time (10ms) but no longer than the driver supports.
8570          */
8571         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8572             duration > rdev->wiphy.max_remain_on_channel_duration)
8573                 return -EINVAL;
8574
8575         err = nl80211_parse_chandef(rdev, info, &chandef);
8576         if (err)
8577                 return err;
8578
8579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8580         if (!msg)
8581                 return -ENOMEM;
8582
8583         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8584                              NL80211_CMD_REMAIN_ON_CHANNEL);
8585         if (!hdr) {
8586                 err = -ENOBUFS;
8587                 goto free_msg;
8588         }
8589
8590         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8591                                      duration, &cookie);
8592
8593         if (err)
8594                 goto free_msg;
8595
8596         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8597                               NL80211_ATTR_PAD))
8598                 goto nla_put_failure;
8599
8600         genlmsg_end(msg, hdr);
8601
8602         return genlmsg_reply(msg, info);
8603
8604  nla_put_failure:
8605         err = -ENOBUFS;
8606  free_msg:
8607         nlmsg_free(msg);
8608         return err;
8609 }
8610
8611 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8612                                             struct genl_info *info)
8613 {
8614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8615         struct wireless_dev *wdev = info->user_ptr[1];
8616         u64 cookie;
8617
8618         if (!info->attrs[NL80211_ATTR_COOKIE])
8619                 return -EINVAL;
8620
8621         if (!rdev->ops->cancel_remain_on_channel)
8622                 return -EOPNOTSUPP;
8623
8624         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8625
8626         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8627 }
8628
8629 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8630                            u8 *rates, u8 rates_len)
8631 {
8632         u8 i;
8633         u32 mask = 0;
8634
8635         for (i = 0; i < rates_len; i++) {
8636                 int rate = (rates[i] & 0x7f) * 5;
8637                 int ridx;
8638
8639                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8640                         struct ieee80211_rate *srate =
8641                                 &sband->bitrates[ridx];
8642                         if (rate == srate->bitrate) {
8643                                 mask |= 1 << ridx;
8644                                 break;
8645                         }
8646                 }
8647                 if (ridx == sband->n_bitrates)
8648                         return 0; /* rate not found */
8649         }
8650
8651         return mask;
8652 }
8653
8654 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8655                                u8 *rates, u8 rates_len,
8656                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8657 {
8658         u8 i;
8659
8660         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8661
8662         for (i = 0; i < rates_len; i++) {
8663                 int ridx, rbit;
8664
8665                 ridx = rates[i] / 8;
8666                 rbit = BIT(rates[i] % 8);
8667
8668                 /* check validity */
8669                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8670                         return false;
8671
8672                 /* check availability */
8673                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8674                         mcs[ridx] |= rbit;
8675                 else
8676                         return false;
8677         }
8678
8679         return true;
8680 }
8681
8682 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8683 {
8684         u16 mcs_mask = 0;
8685
8686         switch (vht_mcs_map) {
8687         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8688                 break;
8689         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8690                 mcs_mask = 0x00FF;
8691                 break;
8692         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8693                 mcs_mask = 0x01FF;
8694                 break;
8695         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8696                 mcs_mask = 0x03FF;
8697                 break;
8698         default:
8699                 break;
8700         }
8701
8702         return mcs_mask;
8703 }
8704
8705 static void vht_build_mcs_mask(u16 vht_mcs_map,
8706                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8707 {
8708         u8 nss;
8709
8710         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8711                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8712                 vht_mcs_map >>= 2;
8713         }
8714 }
8715
8716 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8717                              struct nl80211_txrate_vht *txrate,
8718                              u16 mcs[NL80211_VHT_NSS_MAX])
8719 {
8720         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8721         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8722         u8 i;
8723
8724         if (!sband->vht_cap.vht_supported)
8725                 return false;
8726
8727         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8728
8729         /* Build vht_mcs_mask from VHT capabilities */
8730         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8731
8732         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8733                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8734                         mcs[i] = txrate->mcs[i];
8735                 else
8736                         return false;
8737         }
8738
8739         return true;
8740 }
8741
8742 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8743         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8744                                     .len = NL80211_MAX_SUPP_RATES },
8745         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8746                                 .len = NL80211_MAX_SUPP_HT_RATES },
8747         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8748         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8749 };
8750
8751 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8752                                        struct genl_info *info)
8753 {
8754         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8756         struct cfg80211_bitrate_mask mask;
8757         int rem, i;
8758         struct net_device *dev = info->user_ptr[1];
8759         struct nlattr *tx_rates;
8760         struct ieee80211_supported_band *sband;
8761         u16 vht_tx_mcs_map;
8762
8763         if (!rdev->ops->set_bitrate_mask)
8764                 return -EOPNOTSUPP;
8765
8766         memset(&mask, 0, sizeof(mask));
8767         /* Default to all rates enabled */
8768         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8769                 sband = rdev->wiphy.bands[i];
8770
8771                 if (!sband)
8772                         continue;
8773
8774                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8775                 memcpy(mask.control[i].ht_mcs,
8776                        sband->ht_cap.mcs.rx_mask,
8777                        sizeof(mask.control[i].ht_mcs));
8778
8779                 if (!sband->vht_cap.vht_supported)
8780                         continue;
8781
8782                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8783                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8784         }
8785
8786         /* if no rates are given set it back to the defaults */
8787         if (!info->attrs[NL80211_ATTR_TX_RATES])
8788                 goto out;
8789
8790         /*
8791          * The nested attribute uses enum nl80211_band as the index. This maps
8792          * directly to the enum nl80211_band values used in cfg80211.
8793          */
8794         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8795         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8796                 enum nl80211_band band = nla_type(tx_rates);
8797                 int err;
8798
8799                 if (band < 0 || band >= NUM_NL80211_BANDS)
8800                         return -EINVAL;
8801                 sband = rdev->wiphy.bands[band];
8802                 if (sband == NULL)
8803                         return -EINVAL;
8804                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8805                                 nla_len(tx_rates), nl80211_txattr_policy);
8806                 if (err)
8807                         return err;
8808                 if (tb[NL80211_TXRATE_LEGACY]) {
8809                         mask.control[band].legacy = rateset_to_mask(
8810                                 sband,
8811                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8812                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8813                         if ((mask.control[band].legacy == 0) &&
8814                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8815                                 return -EINVAL;
8816                 }
8817                 if (tb[NL80211_TXRATE_HT]) {
8818                         if (!ht_rateset_to_mask(
8819                                         sband,
8820                                         nla_data(tb[NL80211_TXRATE_HT]),
8821                                         nla_len(tb[NL80211_TXRATE_HT]),
8822                                         mask.control[band].ht_mcs))
8823                                 return -EINVAL;
8824                 }
8825                 if (tb[NL80211_TXRATE_VHT]) {
8826                         if (!vht_set_mcs_mask(
8827                                         sband,
8828                                         nla_data(tb[NL80211_TXRATE_VHT]),
8829                                         mask.control[band].vht_mcs))
8830                                 return -EINVAL;
8831                 }
8832                 if (tb[NL80211_TXRATE_GI]) {
8833                         mask.control[band].gi =
8834                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8835                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8836                                 return -EINVAL;
8837                 }
8838
8839                 if (mask.control[band].legacy == 0) {
8840                         /* don't allow empty legacy rates if HT or VHT
8841                          * are not even supported.
8842                          */
8843                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8844                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8845                                 return -EINVAL;
8846
8847                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8848                                 if (mask.control[band].ht_mcs[i])
8849                                         goto out;
8850
8851                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8852                                 if (mask.control[band].vht_mcs[i])
8853                                         goto out;
8854
8855                         /* legacy and mcs rates may not be both empty */
8856                         return -EINVAL;
8857                 }
8858         }
8859
8860 out:
8861         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8862 }
8863
8864 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8865 {
8866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8867         struct wireless_dev *wdev = info->user_ptr[1];
8868         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8869
8870         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8871                 return -EINVAL;
8872
8873         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8874                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8875
8876         switch (wdev->iftype) {
8877         case NL80211_IFTYPE_STATION:
8878         case NL80211_IFTYPE_ADHOC:
8879         case NL80211_IFTYPE_P2P_CLIENT:
8880         case NL80211_IFTYPE_AP:
8881         case NL80211_IFTYPE_AP_VLAN:
8882         case NL80211_IFTYPE_MESH_POINT:
8883         case NL80211_IFTYPE_P2P_GO:
8884         case NL80211_IFTYPE_P2P_DEVICE:
8885                 break;
8886         default:
8887                 return -EOPNOTSUPP;
8888         }
8889
8890         /* not much point in registering if we can't reply */
8891         if (!rdev->ops->mgmt_tx)
8892                 return -EOPNOTSUPP;
8893
8894         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8895                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8896                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8897 }
8898
8899 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8900 {
8901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8902         struct wireless_dev *wdev = info->user_ptr[1];
8903         struct cfg80211_chan_def chandef;
8904         int err;
8905         void *hdr = NULL;
8906         u64 cookie;
8907         struct sk_buff *msg = NULL;
8908         struct cfg80211_mgmt_tx_params params = {
8909                 .dont_wait_for_ack =
8910                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8911         };
8912
8913         if (!info->attrs[NL80211_ATTR_FRAME])
8914                 return -EINVAL;
8915
8916         if (!rdev->ops->mgmt_tx)
8917                 return -EOPNOTSUPP;
8918
8919         switch (wdev->iftype) {
8920         case NL80211_IFTYPE_P2P_DEVICE:
8921                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8922                         return -EINVAL;
8923         case NL80211_IFTYPE_STATION:
8924         case NL80211_IFTYPE_ADHOC:
8925         case NL80211_IFTYPE_P2P_CLIENT:
8926         case NL80211_IFTYPE_AP:
8927         case NL80211_IFTYPE_AP_VLAN:
8928         case NL80211_IFTYPE_MESH_POINT:
8929         case NL80211_IFTYPE_P2P_GO:
8930                 break;
8931         default:
8932                 return -EOPNOTSUPP;
8933         }
8934
8935         if (info->attrs[NL80211_ATTR_DURATION]) {
8936                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8937                         return -EINVAL;
8938                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8939
8940                 /*
8941                  * We should wait on the channel for at least a minimum amount
8942                  * of time (10ms) but no longer than the driver supports.
8943                  */
8944                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8945                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8946                         return -EINVAL;
8947         }
8948
8949         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8950
8951         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8952                 return -EINVAL;
8953
8954         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8955
8956         /* get the channel if any has been specified, otherwise pass NULL to
8957          * the driver. The latter will use the current one
8958          */
8959         chandef.chan = NULL;
8960         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8961                 err = nl80211_parse_chandef(rdev, info, &chandef);
8962                 if (err)
8963                         return err;
8964         }
8965
8966         if (!chandef.chan && params.offchan)
8967                 return -EINVAL;
8968
8969         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8970         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8971
8972         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8973                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8974                 int i;
8975
8976                 if (len % sizeof(u16))
8977                         return -EINVAL;
8978
8979                 params.n_csa_offsets = len / sizeof(u16);
8980                 params.csa_offsets =
8981                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8982
8983                 /* check that all the offsets fit the frame */
8984                 for (i = 0; i < params.n_csa_offsets; i++) {
8985                         if (params.csa_offsets[i] >= params.len)
8986                                 return -EINVAL;
8987                 }
8988         }
8989
8990         if (!params.dont_wait_for_ack) {
8991                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8992                 if (!msg)
8993                         return -ENOMEM;
8994
8995                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8996                                      NL80211_CMD_FRAME);
8997                 if (!hdr) {
8998                         err = -ENOBUFS;
8999                         goto free_msg;
9000                 }
9001         }
9002
9003         params.chan = chandef.chan;
9004         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9005         if (err)
9006                 goto free_msg;
9007
9008         if (msg) {
9009                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9010                                       NL80211_ATTR_PAD))
9011                         goto nla_put_failure;
9012
9013                 genlmsg_end(msg, hdr);
9014                 return genlmsg_reply(msg, info);
9015         }
9016
9017         return 0;
9018
9019  nla_put_failure:
9020         err = -ENOBUFS;
9021  free_msg:
9022         nlmsg_free(msg);
9023         return err;
9024 }
9025
9026 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9027 {
9028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9029         struct wireless_dev *wdev = info->user_ptr[1];
9030         u64 cookie;
9031
9032         if (!info->attrs[NL80211_ATTR_COOKIE])
9033                 return -EINVAL;
9034
9035         if (!rdev->ops->mgmt_tx_cancel_wait)
9036                 return -EOPNOTSUPP;
9037
9038         switch (wdev->iftype) {
9039         case NL80211_IFTYPE_STATION:
9040         case NL80211_IFTYPE_ADHOC:
9041         case NL80211_IFTYPE_P2P_CLIENT:
9042         case NL80211_IFTYPE_AP:
9043         case NL80211_IFTYPE_AP_VLAN:
9044         case NL80211_IFTYPE_P2P_GO:
9045         case NL80211_IFTYPE_P2P_DEVICE:
9046                 break;
9047         default:
9048                 return -EOPNOTSUPP;
9049         }
9050
9051         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9052
9053         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9054 }
9055
9056 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9057 {
9058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9059         struct wireless_dev *wdev;
9060         struct net_device *dev = info->user_ptr[1];
9061         u8 ps_state;
9062         bool state;
9063         int err;
9064
9065         if (!info->attrs[NL80211_ATTR_PS_STATE])
9066                 return -EINVAL;
9067
9068         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9069
9070         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9071                 return -EINVAL;
9072
9073         wdev = dev->ieee80211_ptr;
9074
9075         if (!rdev->ops->set_power_mgmt)
9076                 return -EOPNOTSUPP;
9077
9078         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9079
9080         if (state == wdev->ps)
9081                 return 0;
9082
9083         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9084         if (!err)
9085                 wdev->ps = state;
9086         return err;
9087 }
9088
9089 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9090 {
9091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9092         enum nl80211_ps_state ps_state;
9093         struct wireless_dev *wdev;
9094         struct net_device *dev = info->user_ptr[1];
9095         struct sk_buff *msg;
9096         void *hdr;
9097         int err;
9098
9099         wdev = dev->ieee80211_ptr;
9100
9101         if (!rdev->ops->set_power_mgmt)
9102                 return -EOPNOTSUPP;
9103
9104         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9105         if (!msg)
9106                 return -ENOMEM;
9107
9108         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9109                              NL80211_CMD_GET_POWER_SAVE);
9110         if (!hdr) {
9111                 err = -ENOBUFS;
9112                 goto free_msg;
9113         }
9114
9115         if (wdev->ps)
9116                 ps_state = NL80211_PS_ENABLED;
9117         else
9118                 ps_state = NL80211_PS_DISABLED;
9119
9120         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9121                 goto nla_put_failure;
9122
9123         genlmsg_end(msg, hdr);
9124         return genlmsg_reply(msg, info);
9125
9126  nla_put_failure:
9127         err = -ENOBUFS;
9128  free_msg:
9129         nlmsg_free(msg);
9130         return err;
9131 }
9132
9133 static const struct nla_policy
9134 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9135         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9136         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9137         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9138         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9139         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9140         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9141 };
9142
9143 static int nl80211_set_cqm_txe(struct genl_info *info,
9144                                u32 rate, u32 pkts, u32 intvl)
9145 {
9146         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9147         struct net_device *dev = info->user_ptr[1];
9148         struct wireless_dev *wdev = dev->ieee80211_ptr;
9149
9150         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9151                 return -EINVAL;
9152
9153         if (!rdev->ops->set_cqm_txe_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_txe_config(rdev, dev, rate, pkts, intvl);
9161 }
9162
9163 static int nl80211_set_cqm_rssi(struct genl_info *info,
9164                                 s32 threshold, u32 hysteresis)
9165 {
9166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9167         struct net_device *dev = info->user_ptr[1];
9168         struct wireless_dev *wdev = dev->ieee80211_ptr;
9169
9170         if (threshold > 0)
9171                 return -EINVAL;
9172
9173         /* disabling - hysteresis should also be zero then */
9174         if (threshold == 0)
9175                 hysteresis = 0;
9176
9177         if (!rdev->ops->set_cqm_rssi_config)
9178                 return -EOPNOTSUPP;
9179
9180         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9181             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9182                 return -EOPNOTSUPP;
9183
9184         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9185 }
9186
9187 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9188 {
9189         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9190         struct nlattr *cqm;
9191         int err;
9192
9193         cqm = info->attrs[NL80211_ATTR_CQM];
9194         if (!cqm)
9195                 return -EINVAL;
9196
9197         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9198                                nl80211_attr_cqm_policy);
9199         if (err)
9200                 return err;
9201
9202         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9203             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9204                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9205                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9206
9207                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9208         }
9209
9210         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9211             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9212             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9213                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9214                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9215                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9216
9217                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9218         }
9219
9220         return -EINVAL;
9221 }
9222
9223 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9224 {
9225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9226         struct net_device *dev = info->user_ptr[1];
9227         struct ocb_setup setup = {};
9228         int err;
9229
9230         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9231         if (err)
9232                 return err;
9233
9234         return cfg80211_join_ocb(rdev, dev, &setup);
9235 }
9236
9237 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9238 {
9239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9240         struct net_device *dev = info->user_ptr[1];
9241
9242         return cfg80211_leave_ocb(rdev, dev);
9243 }
9244
9245 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9246 {
9247         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9248         struct net_device *dev = info->user_ptr[1];
9249         struct mesh_config cfg;
9250         struct mesh_setup setup;
9251         int err;
9252
9253         /* start with default */
9254         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9255         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9256
9257         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9258                 /* and parse parameters if given */
9259                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9260                 if (err)
9261                         return err;
9262         }
9263
9264         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9265             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9266                 return -EINVAL;
9267
9268         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9269         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9270
9271         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9272             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9273                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9274                         return -EINVAL;
9275
9276         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9277                 setup.beacon_interval =
9278                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9279
9280                 err = cfg80211_validate_beacon_int(rdev, setup.beacon_interval);
9281                 if (err)
9282                         return err;
9283         }
9284
9285         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9286                 setup.dtim_period =
9287                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9288                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9289                         return -EINVAL;
9290         }
9291
9292         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9293                 /* parse additional setup parameters if given */
9294                 err = nl80211_parse_mesh_setup(info, &setup);
9295                 if (err)
9296                         return err;
9297         }
9298
9299         if (setup.user_mpm)
9300                 cfg.auto_open_plinks = false;
9301
9302         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9303                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9304                 if (err)
9305                         return err;
9306         } else {
9307                 /* cfg80211_join_mesh() will sort it out */
9308                 setup.chandef.chan = NULL;
9309         }
9310
9311         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9312                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9313                 int n_rates =
9314                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9315                 struct ieee80211_supported_band *sband;
9316
9317                 if (!setup.chandef.chan)
9318                         return -EINVAL;
9319
9320                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9321
9322                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9323                                              &setup.basic_rates);
9324                 if (err)
9325                         return err;
9326         }
9327
9328         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9329 }
9330
9331 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9332 {
9333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9334         struct net_device *dev = info->user_ptr[1];
9335
9336         return cfg80211_leave_mesh(rdev, dev);
9337 }
9338
9339 #ifdef CONFIG_PM
9340 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9341                                         struct cfg80211_registered_device *rdev)
9342 {
9343         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9344         struct nlattr *nl_pats, *nl_pat;
9345         int i, pat_len;
9346
9347         if (!wowlan->n_patterns)
9348                 return 0;
9349
9350         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9351         if (!nl_pats)
9352                 return -ENOBUFS;
9353
9354         for (i = 0; i < wowlan->n_patterns; i++) {
9355                 nl_pat = nla_nest_start(msg, i + 1);
9356                 if (!nl_pat)
9357                         return -ENOBUFS;
9358                 pat_len = wowlan->patterns[i].pattern_len;
9359                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9360                             wowlan->patterns[i].mask) ||
9361                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9362                             wowlan->patterns[i].pattern) ||
9363                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9364                                 wowlan->patterns[i].pkt_offset))
9365                         return -ENOBUFS;
9366                 nla_nest_end(msg, nl_pat);
9367         }
9368         nla_nest_end(msg, nl_pats);
9369
9370         return 0;
9371 }
9372
9373 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9374                                    struct cfg80211_wowlan_tcp *tcp)
9375 {
9376         struct nlattr *nl_tcp;
9377
9378         if (!tcp)
9379                 return 0;
9380
9381         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9382         if (!nl_tcp)
9383                 return -ENOBUFS;
9384
9385         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9386             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9387             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9388             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9389             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9390             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9391                     tcp->payload_len, tcp->payload) ||
9392             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9393                         tcp->data_interval) ||
9394             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9395                     tcp->wake_len, tcp->wake_data) ||
9396             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9397                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9398                 return -ENOBUFS;
9399
9400         if (tcp->payload_seq.len &&
9401             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9402                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9403                 return -ENOBUFS;
9404
9405         if (tcp->payload_tok.len &&
9406             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9407                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9408                     &tcp->payload_tok))
9409                 return -ENOBUFS;
9410
9411         nla_nest_end(msg, nl_tcp);
9412
9413         return 0;
9414 }
9415
9416 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9417                                   struct cfg80211_sched_scan_request *req)
9418 {
9419         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9420         int i;
9421
9422         if (!req)
9423                 return 0;
9424
9425         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9426         if (!nd)
9427                 return -ENOBUFS;
9428
9429         if (req->n_scan_plans == 1 &&
9430             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9431                         req->scan_plans[0].interval * 1000))
9432                 return -ENOBUFS;
9433
9434         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9435                 return -ENOBUFS;
9436
9437         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9438         if (!freqs)
9439                 return -ENOBUFS;
9440
9441         for (i = 0; i < req->n_channels; i++)
9442                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9443
9444         nla_nest_end(msg, freqs);
9445
9446         if (req->n_match_sets) {
9447                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9448                 for (i = 0; i < req->n_match_sets; i++) {
9449                         match = nla_nest_start(msg, i);
9450                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9451                                 req->match_sets[i].ssid.ssid_len,
9452                                 req->match_sets[i].ssid.ssid);
9453                         nla_nest_end(msg, match);
9454                 }
9455                 nla_nest_end(msg, matches);
9456         }
9457
9458         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9459         if (!scan_plans)
9460                 return -ENOBUFS;
9461
9462         for (i = 0; i < req->n_scan_plans; i++) {
9463                 scan_plan = nla_nest_start(msg, i + 1);
9464                 if (!scan_plan ||
9465                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9466                                 req->scan_plans[i].interval) ||
9467                     (req->scan_plans[i].iterations &&
9468                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9469                                  req->scan_plans[i].iterations)))
9470                         return -ENOBUFS;
9471                 nla_nest_end(msg, scan_plan);
9472         }
9473         nla_nest_end(msg, scan_plans);
9474
9475         nla_nest_end(msg, nd);
9476
9477         return 0;
9478 }
9479
9480 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9481 {
9482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9483         struct sk_buff *msg;
9484         void *hdr;
9485         u32 size = NLMSG_DEFAULT_SIZE;
9486
9487         if (!rdev->wiphy.wowlan)
9488                 return -EOPNOTSUPP;
9489
9490         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9491                 /* adjust size to have room for all the data */
9492                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9493                         rdev->wiphy.wowlan_config->tcp->payload_len +
9494                         rdev->wiphy.wowlan_config->tcp->wake_len +
9495                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9496         }
9497
9498         msg = nlmsg_new(size, GFP_KERNEL);
9499         if (!msg)
9500                 return -ENOMEM;
9501
9502         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9503                              NL80211_CMD_GET_WOWLAN);
9504         if (!hdr)
9505                 goto nla_put_failure;
9506
9507         if (rdev->wiphy.wowlan_config) {
9508                 struct nlattr *nl_wowlan;
9509
9510                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9511                 if (!nl_wowlan)
9512                         goto nla_put_failure;
9513
9514                 if ((rdev->wiphy.wowlan_config->any &&
9515                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9516                     (rdev->wiphy.wowlan_config->disconnect &&
9517                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9518                     (rdev->wiphy.wowlan_config->magic_pkt &&
9519                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9520                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9521                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9522                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9523                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9524                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9525                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9526                     (rdev->wiphy.wowlan_config->rfkill_release &&
9527                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9528                         goto nla_put_failure;
9529
9530                 if (nl80211_send_wowlan_patterns(msg, rdev))
9531                         goto nla_put_failure;
9532
9533                 if (nl80211_send_wowlan_tcp(msg,
9534                                             rdev->wiphy.wowlan_config->tcp))
9535                         goto nla_put_failure;
9536
9537                 if (nl80211_send_wowlan_nd(
9538                             msg,
9539                             rdev->wiphy.wowlan_config->nd_config))
9540                         goto nla_put_failure;
9541
9542                 nla_nest_end(msg, nl_wowlan);
9543         }
9544
9545         genlmsg_end(msg, hdr);
9546         return genlmsg_reply(msg, info);
9547
9548 nla_put_failure:
9549         nlmsg_free(msg);
9550         return -ENOBUFS;
9551 }
9552
9553 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9554                                     struct nlattr *attr,
9555                                     struct cfg80211_wowlan *trig)
9556 {
9557         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9558         struct cfg80211_wowlan_tcp *cfg;
9559         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9560         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9561         u32 size;
9562         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9563         int err, port;
9564
9565         if (!rdev->wiphy.wowlan->tcp)
9566                 return -EINVAL;
9567
9568         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9569                         nla_data(attr), nla_len(attr),
9570                         nl80211_wowlan_tcp_policy);
9571         if (err)
9572                 return err;
9573
9574         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9575             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9576             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9577             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9578             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9579             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9580             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9581             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9582                 return -EINVAL;
9583
9584         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9585         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9586                 return -EINVAL;
9587
9588         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9589                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9590             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9591                 return -EINVAL;
9592
9593         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9594         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9595                 return -EINVAL;
9596
9597         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9598         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9599                 return -EINVAL;
9600
9601         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9602                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9603
9604                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9605                 tokens_size = tokln - sizeof(*tok);
9606
9607                 if (!tok->len || tokens_size % tok->len)
9608                         return -EINVAL;
9609                 if (!rdev->wiphy.wowlan->tcp->tok)
9610                         return -EINVAL;
9611                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9612                         return -EINVAL;
9613                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9614                         return -EINVAL;
9615                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9616                         return -EINVAL;
9617                 if (tok->offset + tok->len > data_size)
9618                         return -EINVAL;
9619         }
9620
9621         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9622                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9623                 if (!rdev->wiphy.wowlan->tcp->seq)
9624                         return -EINVAL;
9625                 if (seq->len == 0 || seq->len > 4)
9626                         return -EINVAL;
9627                 if (seq->len + seq->offset > data_size)
9628                         return -EINVAL;
9629         }
9630
9631         size = sizeof(*cfg);
9632         size += data_size;
9633         size += wake_size + wake_mask_size;
9634         size += tokens_size;
9635
9636         cfg = kzalloc(size, GFP_KERNEL);
9637         if (!cfg)
9638                 return -ENOMEM;
9639         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9640         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9641         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9642                ETH_ALEN);
9643         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9644                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9645         else
9646                 port = 0;
9647 #ifdef CONFIG_INET
9648         /* allocate a socket and port for it and use it */
9649         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9650                             IPPROTO_TCP, &cfg->sock, 1);
9651         if (err) {
9652                 kfree(cfg);
9653                 return err;
9654         }
9655         if (inet_csk_get_port(cfg->sock->sk, port)) {
9656                 sock_release(cfg->sock);
9657                 kfree(cfg);
9658                 return -EADDRINUSE;
9659         }
9660         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9661 #else
9662         if (!port) {
9663                 kfree(cfg);
9664                 return -EINVAL;
9665         }
9666         cfg->src_port = port;
9667 #endif
9668
9669         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9670         cfg->payload_len = data_size;
9671         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9672         memcpy((void *)cfg->payload,
9673                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9674                data_size);
9675         if (seq)
9676                 cfg->payload_seq = *seq;
9677         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9678         cfg->wake_len = wake_size;
9679         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9680         memcpy((void *)cfg->wake_data,
9681                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9682                wake_size);
9683         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9684                          data_size + wake_size;
9685         memcpy((void *)cfg->wake_mask,
9686                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9687                wake_mask_size);
9688         if (tok) {
9689                 cfg->tokens_size = tokens_size;
9690                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9691         }
9692
9693         trig->tcp = cfg;
9694
9695         return 0;
9696 }
9697
9698 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9699                                    const struct wiphy_wowlan_support *wowlan,
9700                                    struct nlattr *attr,
9701                                    struct cfg80211_wowlan *trig)
9702 {
9703         struct nlattr **tb;
9704         int err;
9705
9706         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9707         if (!tb)
9708                 return -ENOMEM;
9709
9710         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9711                 err = -EOPNOTSUPP;
9712                 goto out;
9713         }
9714
9715         err = nla_parse(tb, NL80211_ATTR_MAX,
9716                         nla_data(attr), nla_len(attr),
9717                         nl80211_policy);
9718         if (err)
9719                 goto out;
9720
9721         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9722         err = PTR_ERR_OR_ZERO(trig->nd_config);
9723         if (err)
9724                 trig->nd_config = NULL;
9725
9726 out:
9727         kfree(tb);
9728         return err;
9729 }
9730
9731 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9732 {
9733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9734         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9735         struct cfg80211_wowlan new_triggers = {};
9736         struct cfg80211_wowlan *ntrig;
9737         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9738         int err, i;
9739         bool prev_enabled = rdev->wiphy.wowlan_config;
9740         bool regular = false;
9741
9742         if (!wowlan)
9743                 return -EOPNOTSUPP;
9744
9745         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9746                 cfg80211_rdev_free_wowlan(rdev);
9747                 rdev->wiphy.wowlan_config = NULL;
9748                 goto set_wakeup;
9749         }
9750
9751         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9752                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9753                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9754                         nl80211_wowlan_policy);
9755         if (err)
9756                 return err;
9757
9758         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9759                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9760                         return -EINVAL;
9761                 new_triggers.any = true;
9762         }
9763
9764         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9765                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9766                         return -EINVAL;
9767                 new_triggers.disconnect = true;
9768                 regular = true;
9769         }
9770
9771         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9772                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9773                         return -EINVAL;
9774                 new_triggers.magic_pkt = true;
9775                 regular = true;
9776         }
9777
9778         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9779                 return -EINVAL;
9780
9781         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9782                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9783                         return -EINVAL;
9784                 new_triggers.gtk_rekey_failure = true;
9785                 regular = true;
9786         }
9787
9788         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9789                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9790                         return -EINVAL;
9791                 new_triggers.eap_identity_req = true;
9792                 regular = true;
9793         }
9794
9795         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9796                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9797                         return -EINVAL;
9798                 new_triggers.four_way_handshake = true;
9799                 regular = true;
9800         }
9801
9802         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9803                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9804                         return -EINVAL;
9805                 new_triggers.rfkill_release = true;
9806                 regular = true;
9807         }
9808
9809         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9810                 struct nlattr *pat;
9811                 int n_patterns = 0;
9812                 int rem, pat_len, mask_len, pkt_offset;
9813                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9814
9815                 regular = true;
9816
9817                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9818                                     rem)
9819                         n_patterns++;
9820                 if (n_patterns > wowlan->n_patterns)
9821                         return -EINVAL;
9822
9823                 new_triggers.patterns = kcalloc(n_patterns,
9824                                                 sizeof(new_triggers.patterns[0]),
9825                                                 GFP_KERNEL);
9826                 if (!new_triggers.patterns)
9827                         return -ENOMEM;
9828
9829                 new_triggers.n_patterns = n_patterns;
9830                 i = 0;
9831
9832                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9833                                     rem) {
9834                         u8 *mask_pat;
9835
9836                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9837                                   nla_len(pat), NULL);
9838                         err = -EINVAL;
9839                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9840                             !pat_tb[NL80211_PKTPAT_PATTERN])
9841                                 goto error;
9842                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9843                         mask_len = DIV_ROUND_UP(pat_len, 8);
9844                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9845                                 goto error;
9846                         if (pat_len > wowlan->pattern_max_len ||
9847                             pat_len < wowlan->pattern_min_len)
9848                                 goto error;
9849
9850                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9851                                 pkt_offset = 0;
9852                         else
9853                                 pkt_offset = nla_get_u32(
9854                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9855                         if (pkt_offset > wowlan->max_pkt_offset)
9856                                 goto error;
9857                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9858
9859                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9860                         if (!mask_pat) {
9861                                 err = -ENOMEM;
9862                                 goto error;
9863                         }
9864                         new_triggers.patterns[i].mask = mask_pat;
9865                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9866                                mask_len);
9867                         mask_pat += mask_len;
9868                         new_triggers.patterns[i].pattern = mask_pat;
9869                         new_triggers.patterns[i].pattern_len = pat_len;
9870                         memcpy(mask_pat,
9871                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9872                                pat_len);
9873                         i++;
9874                 }
9875         }
9876
9877         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9878                 regular = true;
9879                 err = nl80211_parse_wowlan_tcp(
9880                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9881                         &new_triggers);
9882                 if (err)
9883                         goto error;
9884         }
9885
9886         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9887                 regular = true;
9888                 err = nl80211_parse_wowlan_nd(
9889                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9890                         &new_triggers);
9891                 if (err)
9892                         goto error;
9893         }
9894
9895         /* The 'any' trigger means the device continues operating more or less
9896          * as in its normal operation mode and wakes up the host on most of the
9897          * normal interrupts (like packet RX, ...)
9898          * It therefore makes little sense to combine with the more constrained
9899          * wakeup trigger modes.
9900          */
9901         if (new_triggers.any && regular) {
9902                 err = -EINVAL;
9903                 goto error;
9904         }
9905
9906         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9907         if (!ntrig) {
9908                 err = -ENOMEM;
9909                 goto error;
9910         }
9911         cfg80211_rdev_free_wowlan(rdev);
9912         rdev->wiphy.wowlan_config = ntrig;
9913
9914  set_wakeup:
9915         if (rdev->ops->set_wakeup &&
9916             prev_enabled != !!rdev->wiphy.wowlan_config)
9917                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9918
9919         return 0;
9920  error:
9921         for (i = 0; i < new_triggers.n_patterns; i++)
9922                 kfree(new_triggers.patterns[i].mask);
9923         kfree(new_triggers.patterns);
9924         if (new_triggers.tcp && new_triggers.tcp->sock)
9925                 sock_release(new_triggers.tcp->sock);
9926         kfree(new_triggers.tcp);
9927         kfree(new_triggers.nd_config);
9928         return err;
9929 }
9930 #endif
9931
9932 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9933                                        struct cfg80211_registered_device *rdev)
9934 {
9935         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9936         int i, j, pat_len;
9937         struct cfg80211_coalesce_rules *rule;
9938
9939         if (!rdev->coalesce->n_rules)
9940                 return 0;
9941
9942         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9943         if (!nl_rules)
9944                 return -ENOBUFS;
9945
9946         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9947                 nl_rule = nla_nest_start(msg, i + 1);
9948                 if (!nl_rule)
9949                         return -ENOBUFS;
9950
9951                 rule = &rdev->coalesce->rules[i];
9952                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9953                                 rule->delay))
9954                         return -ENOBUFS;
9955
9956                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9957                                 rule->condition))
9958                         return -ENOBUFS;
9959
9960                 nl_pats = nla_nest_start(msg,
9961                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9962                 if (!nl_pats)
9963                         return -ENOBUFS;
9964
9965                 for (j = 0; j < rule->n_patterns; j++) {
9966                         nl_pat = nla_nest_start(msg, j + 1);
9967                         if (!nl_pat)
9968                                 return -ENOBUFS;
9969                         pat_len = rule->patterns[j].pattern_len;
9970                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9971                                     DIV_ROUND_UP(pat_len, 8),
9972                                     rule->patterns[j].mask) ||
9973                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9974                                     rule->patterns[j].pattern) ||
9975                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9976                                         rule->patterns[j].pkt_offset))
9977                                 return -ENOBUFS;
9978                         nla_nest_end(msg, nl_pat);
9979                 }
9980                 nla_nest_end(msg, nl_pats);
9981                 nla_nest_end(msg, nl_rule);
9982         }
9983         nla_nest_end(msg, nl_rules);
9984
9985         return 0;
9986 }
9987
9988 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9989 {
9990         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9991         struct sk_buff *msg;
9992         void *hdr;
9993
9994         if (!rdev->wiphy.coalesce)
9995                 return -EOPNOTSUPP;
9996
9997         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9998         if (!msg)
9999                 return -ENOMEM;
10000
10001         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10002                              NL80211_CMD_GET_COALESCE);
10003         if (!hdr)
10004                 goto nla_put_failure;
10005
10006         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10007                 goto nla_put_failure;
10008
10009         genlmsg_end(msg, hdr);
10010         return genlmsg_reply(msg, info);
10011
10012 nla_put_failure:
10013         nlmsg_free(msg);
10014         return -ENOBUFS;
10015 }
10016
10017 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10018 {
10019         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10020         int i, j;
10021         struct cfg80211_coalesce_rules *rule;
10022
10023         if (!coalesce)
10024                 return;
10025
10026         for (i = 0; i < coalesce->n_rules; i++) {
10027                 rule = &coalesce->rules[i];
10028                 for (j = 0; j < rule->n_patterns; j++)
10029                         kfree(rule->patterns[j].mask);
10030                 kfree(rule->patterns);
10031         }
10032         kfree(coalesce->rules);
10033         kfree(coalesce);
10034         rdev->coalesce = NULL;
10035 }
10036
10037 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10038                                        struct nlattr *rule,
10039                                        struct cfg80211_coalesce_rules *new_rule)
10040 {
10041         int err, i;
10042         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10043         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10044         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10045         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10046
10047         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
10048                         nla_len(rule), nl80211_coalesce_policy);
10049         if (err)
10050                 return err;
10051
10052         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10053                 new_rule->delay =
10054                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10055         if (new_rule->delay > coalesce->max_delay)
10056                 return -EINVAL;
10057
10058         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10059                 new_rule->condition =
10060                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10061         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10062             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10063                 return -EINVAL;
10064
10065         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10066                 return -EINVAL;
10067
10068         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10069                             rem)
10070                 n_patterns++;
10071         if (n_patterns > coalesce->n_patterns)
10072                 return -EINVAL;
10073
10074         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10075                                      GFP_KERNEL);
10076         if (!new_rule->patterns)
10077                 return -ENOMEM;
10078
10079         new_rule->n_patterns = n_patterns;
10080         i = 0;
10081
10082         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10083                             rem) {
10084                 u8 *mask_pat;
10085
10086                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10087                           nla_len(pat), NULL);
10088                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10089                     !pat_tb[NL80211_PKTPAT_PATTERN])
10090                         return -EINVAL;
10091                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10092                 mask_len = DIV_ROUND_UP(pat_len, 8);
10093                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10094                         return -EINVAL;
10095                 if (pat_len > coalesce->pattern_max_len ||
10096                     pat_len < coalesce->pattern_min_len)
10097                         return -EINVAL;
10098
10099                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10100                         pkt_offset = 0;
10101                 else
10102                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10103                 if (pkt_offset > coalesce->max_pkt_offset)
10104                         return -EINVAL;
10105                 new_rule->patterns[i].pkt_offset = pkt_offset;
10106
10107                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10108                 if (!mask_pat)
10109                         return -ENOMEM;
10110
10111                 new_rule->patterns[i].mask = mask_pat;
10112                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10113                        mask_len);
10114
10115                 mask_pat += mask_len;
10116                 new_rule->patterns[i].pattern = mask_pat;
10117                 new_rule->patterns[i].pattern_len = pat_len;
10118                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10119                        pat_len);
10120                 i++;
10121         }
10122
10123         return 0;
10124 }
10125
10126 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10127 {
10128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10129         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10130         struct cfg80211_coalesce new_coalesce = {};
10131         struct cfg80211_coalesce *n_coalesce;
10132         int err, rem_rule, n_rules = 0, i, j;
10133         struct nlattr *rule;
10134         struct cfg80211_coalesce_rules *tmp_rule;
10135
10136         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10137                 return -EOPNOTSUPP;
10138
10139         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10140                 cfg80211_rdev_free_coalesce(rdev);
10141                 rdev_set_coalesce(rdev, NULL);
10142                 return 0;
10143         }
10144
10145         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10146                             rem_rule)
10147                 n_rules++;
10148         if (n_rules > coalesce->n_rules)
10149                 return -EINVAL;
10150
10151         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10152                                      GFP_KERNEL);
10153         if (!new_coalesce.rules)
10154                 return -ENOMEM;
10155
10156         new_coalesce.n_rules = n_rules;
10157         i = 0;
10158
10159         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10160                             rem_rule) {
10161                 err = nl80211_parse_coalesce_rule(rdev, rule,
10162                                                   &new_coalesce.rules[i]);
10163                 if (err)
10164                         goto error;
10165
10166                 i++;
10167         }
10168
10169         err = rdev_set_coalesce(rdev, &new_coalesce);
10170         if (err)
10171                 goto error;
10172
10173         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10174         if (!n_coalesce) {
10175                 err = -ENOMEM;
10176                 goto error;
10177         }
10178         cfg80211_rdev_free_coalesce(rdev);
10179         rdev->coalesce = n_coalesce;
10180
10181         return 0;
10182 error:
10183         for (i = 0; i < new_coalesce.n_rules; i++) {
10184                 tmp_rule = &new_coalesce.rules[i];
10185                 for (j = 0; j < tmp_rule->n_patterns; j++)
10186                         kfree(tmp_rule->patterns[j].mask);
10187                 kfree(tmp_rule->patterns);
10188         }
10189         kfree(new_coalesce.rules);
10190
10191         return err;
10192 }
10193
10194 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10195 {
10196         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10197         struct net_device *dev = info->user_ptr[1];
10198         struct wireless_dev *wdev = dev->ieee80211_ptr;
10199         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10200         struct cfg80211_gtk_rekey_data rekey_data;
10201         int err;
10202
10203         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10204                 return -EINVAL;
10205
10206         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10207                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10208                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10209                         nl80211_rekey_policy);
10210         if (err)
10211                 return err;
10212
10213         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10214                 return -ERANGE;
10215         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10216                 return -ERANGE;
10217         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10218                 return -ERANGE;
10219
10220         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10221         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10222         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10223
10224         wdev_lock(wdev);
10225         if (!wdev->current_bss) {
10226                 err = -ENOTCONN;
10227                 goto out;
10228         }
10229
10230         if (!rdev->ops->set_rekey_data) {
10231                 err = -EOPNOTSUPP;
10232                 goto out;
10233         }
10234
10235         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10236  out:
10237         wdev_unlock(wdev);
10238         return err;
10239 }
10240
10241 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10242                                              struct genl_info *info)
10243 {
10244         struct net_device *dev = info->user_ptr[1];
10245         struct wireless_dev *wdev = dev->ieee80211_ptr;
10246
10247         if (wdev->iftype != NL80211_IFTYPE_AP &&
10248             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10249                 return -EINVAL;
10250
10251         if (wdev->ap_unexpected_nlportid)
10252                 return -EBUSY;
10253
10254         wdev->ap_unexpected_nlportid = info->snd_portid;
10255         return 0;
10256 }
10257
10258 static int nl80211_probe_client(struct sk_buff *skb,
10259                                 struct genl_info *info)
10260 {
10261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10262         struct net_device *dev = info->user_ptr[1];
10263         struct wireless_dev *wdev = dev->ieee80211_ptr;
10264         struct sk_buff *msg;
10265         void *hdr;
10266         const u8 *addr;
10267         u64 cookie;
10268         int err;
10269
10270         if (wdev->iftype != NL80211_IFTYPE_AP &&
10271             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10272                 return -EOPNOTSUPP;
10273
10274         if (!info->attrs[NL80211_ATTR_MAC])
10275                 return -EINVAL;
10276
10277         if (!rdev->ops->probe_client)
10278                 return -EOPNOTSUPP;
10279
10280         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10281         if (!msg)
10282                 return -ENOMEM;
10283
10284         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10285                              NL80211_CMD_PROBE_CLIENT);
10286         if (!hdr) {
10287                 err = -ENOBUFS;
10288                 goto free_msg;
10289         }
10290
10291         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10292
10293         err = rdev_probe_client(rdev, dev, addr, &cookie);
10294         if (err)
10295                 goto free_msg;
10296
10297         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10298                               NL80211_ATTR_PAD))
10299                 goto nla_put_failure;
10300
10301         genlmsg_end(msg, hdr);
10302
10303         return genlmsg_reply(msg, info);
10304
10305  nla_put_failure:
10306         err = -ENOBUFS;
10307  free_msg:
10308         nlmsg_free(msg);
10309         return err;
10310 }
10311
10312 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10313 {
10314         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10315         struct cfg80211_beacon_registration *reg, *nreg;
10316         int rv;
10317
10318         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10319                 return -EOPNOTSUPP;
10320
10321         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10322         if (!nreg)
10323                 return -ENOMEM;
10324
10325         /* First, check if already registered. */
10326         spin_lock_bh(&rdev->beacon_registrations_lock);
10327         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10328                 if (reg->nlportid == info->snd_portid) {
10329                         rv = -EALREADY;
10330                         goto out_err;
10331                 }
10332         }
10333         /* Add it to the list */
10334         nreg->nlportid = info->snd_portid;
10335         list_add(&nreg->list, &rdev->beacon_registrations);
10336
10337         spin_unlock_bh(&rdev->beacon_registrations_lock);
10338
10339         return 0;
10340 out_err:
10341         spin_unlock_bh(&rdev->beacon_registrations_lock);
10342         kfree(nreg);
10343         return rv;
10344 }
10345
10346 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10347 {
10348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10349         struct wireless_dev *wdev = info->user_ptr[1];
10350         int err;
10351
10352         if (!rdev->ops->start_p2p_device)
10353                 return -EOPNOTSUPP;
10354
10355         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10356                 return -EOPNOTSUPP;
10357
10358         if (wdev->p2p_started)
10359                 return 0;
10360
10361         if (rfkill_blocked(rdev->rfkill))
10362                 return -ERFKILL;
10363
10364         err = rdev_start_p2p_device(rdev, wdev);
10365         if (err)
10366                 return err;
10367
10368         wdev->p2p_started = true;
10369         rdev->opencount++;
10370
10371         return 0;
10372 }
10373
10374 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10375 {
10376         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10377         struct wireless_dev *wdev = info->user_ptr[1];
10378
10379         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10380                 return -EOPNOTSUPP;
10381
10382         if (!rdev->ops->stop_p2p_device)
10383                 return -EOPNOTSUPP;
10384
10385         cfg80211_stop_p2p_device(rdev, wdev);
10386
10387         return 0;
10388 }
10389
10390 static int nl80211_get_protocol_features(struct sk_buff *skb,
10391                                          struct genl_info *info)
10392 {
10393         void *hdr;
10394         struct sk_buff *msg;
10395
10396         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10397         if (!msg)
10398                 return -ENOMEM;
10399
10400         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10401                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10402         if (!hdr)
10403                 goto nla_put_failure;
10404
10405         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10406                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10407                 goto nla_put_failure;
10408
10409         genlmsg_end(msg, hdr);
10410         return genlmsg_reply(msg, info);
10411
10412  nla_put_failure:
10413         kfree_skb(msg);
10414         return -ENOBUFS;
10415 }
10416
10417 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10418 {
10419         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10420         struct cfg80211_update_ft_ies_params ft_params;
10421         struct net_device *dev = info->user_ptr[1];
10422
10423         if (!rdev->ops->update_ft_ies)
10424                 return -EOPNOTSUPP;
10425
10426         if (!info->attrs[NL80211_ATTR_MDID] ||
10427             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10428                 return -EINVAL;
10429
10430         memset(&ft_params, 0, sizeof(ft_params));
10431         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10432         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10433         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10434
10435         return rdev_update_ft_ies(rdev, dev, &ft_params);
10436 }
10437
10438 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10439                                        struct genl_info *info)
10440 {
10441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10442         struct wireless_dev *wdev = info->user_ptr[1];
10443         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10444         u16 duration;
10445         int ret;
10446
10447         if (!rdev->ops->crit_proto_start)
10448                 return -EOPNOTSUPP;
10449
10450         if (WARN_ON(!rdev->ops->crit_proto_stop))
10451                 return -EINVAL;
10452
10453         if (rdev->crit_proto_nlportid)
10454                 return -EBUSY;
10455
10456         /* determine protocol if provided */
10457         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10458                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10459
10460         if (proto >= NUM_NL80211_CRIT_PROTO)
10461                 return -EINVAL;
10462
10463         /* timeout must be provided */
10464         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10465                 return -EINVAL;
10466
10467         duration =
10468                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10469
10470         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10471                 return -ERANGE;
10472
10473         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10474         if (!ret)
10475                 rdev->crit_proto_nlportid = info->snd_portid;
10476
10477         return ret;
10478 }
10479
10480 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10481                                       struct genl_info *info)
10482 {
10483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10484         struct wireless_dev *wdev = info->user_ptr[1];
10485
10486         if (!rdev->ops->crit_proto_stop)
10487                 return -EOPNOTSUPP;
10488
10489         if (rdev->crit_proto_nlportid) {
10490                 rdev->crit_proto_nlportid = 0;
10491                 rdev_crit_proto_stop(rdev, wdev);
10492         }
10493         return 0;
10494 }
10495
10496 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10497 {
10498         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10499         struct wireless_dev *wdev =
10500                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10501         int i, err;
10502         u32 vid, subcmd;
10503
10504         if (!rdev->wiphy.vendor_commands)
10505                 return -EOPNOTSUPP;
10506
10507         if (IS_ERR(wdev)) {
10508                 err = PTR_ERR(wdev);
10509                 if (err != -EINVAL)
10510                         return err;
10511                 wdev = NULL;
10512         } else if (wdev->wiphy != &rdev->wiphy) {
10513                 return -EINVAL;
10514         }
10515
10516         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10517             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10518                 return -EINVAL;
10519
10520         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10521         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10522         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10523                 const struct wiphy_vendor_command *vcmd;
10524                 void *data = NULL;
10525                 int len = 0;
10526
10527                 vcmd = &rdev->wiphy.vendor_commands[i];
10528
10529                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10530                         continue;
10531
10532                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10533                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10534                         if (!wdev)
10535                                 return -EINVAL;
10536                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10537                             !wdev->netdev)
10538                                 return -EINVAL;
10539
10540                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10541                                 if (wdev->netdev &&
10542                                     !netif_running(wdev->netdev))
10543                                         return -ENETDOWN;
10544                                 if (!wdev->netdev && !wdev->p2p_started)
10545                                         return -ENETDOWN;
10546                         }
10547
10548                         if (!vcmd->doit)
10549                                 return -EOPNOTSUPP;
10550                 } else {
10551                         wdev = NULL;
10552                 }
10553
10554                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10555                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10556                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10557                 }
10558
10559                 rdev->cur_cmd_info = info;
10560                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10561                                                           data, len);
10562                 rdev->cur_cmd_info = NULL;
10563                 return err;
10564         }
10565
10566         return -EOPNOTSUPP;
10567 }
10568
10569 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10570                                        struct netlink_callback *cb,
10571                                        struct cfg80211_registered_device **rdev,
10572                                        struct wireless_dev **wdev)
10573 {
10574         u32 vid, subcmd;
10575         unsigned int i;
10576         int vcmd_idx = -1;
10577         int err;
10578         void *data = NULL;
10579         unsigned int data_len = 0;
10580
10581         rtnl_lock();
10582
10583         if (cb->args[0]) {
10584                 /* subtract the 1 again here */
10585                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10586                 struct wireless_dev *tmp;
10587
10588                 if (!wiphy) {
10589                         err = -ENODEV;
10590                         goto out_unlock;
10591                 }
10592                 *rdev = wiphy_to_rdev(wiphy);
10593                 *wdev = NULL;
10594
10595                 if (cb->args[1]) {
10596                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10597                                 if (tmp->identifier == cb->args[1] - 1) {
10598                                         *wdev = tmp;
10599                                         break;
10600                                 }
10601                         }
10602                 }
10603
10604                 /* keep rtnl locked in successful case */
10605                 return 0;
10606         }
10607
10608         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10609                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10610                           nl80211_policy);
10611         if (err)
10612                 goto out_unlock;
10613
10614         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10615             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10616                 err = -EINVAL;
10617                 goto out_unlock;
10618         }
10619
10620         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10621                                            nl80211_fam.attrbuf);
10622         if (IS_ERR(*wdev))
10623                 *wdev = NULL;
10624
10625         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10626                                            nl80211_fam.attrbuf);
10627         if (IS_ERR(*rdev)) {
10628                 err = PTR_ERR(*rdev);
10629                 goto out_unlock;
10630         }
10631
10632         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10633         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10634
10635         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10636                 const struct wiphy_vendor_command *vcmd;
10637
10638                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10639
10640                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10641                         continue;
10642
10643                 if (!vcmd->dumpit) {
10644                         err = -EOPNOTSUPP;
10645                         goto out_unlock;
10646                 }
10647
10648                 vcmd_idx = i;
10649                 break;
10650         }
10651
10652         if (vcmd_idx < 0) {
10653                 err = -EOPNOTSUPP;
10654                 goto out_unlock;
10655         }
10656
10657         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10658                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10659                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10660         }
10661
10662         /* 0 is the first index - add 1 to parse only once */
10663         cb->args[0] = (*rdev)->wiphy_idx + 1;
10664         /* add 1 to know if it was NULL */
10665         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10666         cb->args[2] = vcmd_idx;
10667         cb->args[3] = (unsigned long)data;
10668         cb->args[4] = data_len;
10669
10670         /* keep rtnl locked in successful case */
10671         return 0;
10672  out_unlock:
10673         rtnl_unlock();
10674         return err;
10675 }
10676
10677 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10678                                    struct netlink_callback *cb)
10679 {
10680         struct cfg80211_registered_device *rdev;
10681         struct wireless_dev *wdev;
10682         unsigned int vcmd_idx;
10683         const struct wiphy_vendor_command *vcmd;
10684         void *data;
10685         int data_len;
10686         int err;
10687         struct nlattr *vendor_data;
10688
10689         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10690         if (err)
10691                 return err;
10692
10693         vcmd_idx = cb->args[2];
10694         data = (void *)cb->args[3];
10695         data_len = cb->args[4];
10696         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10697
10698         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10699                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10700                 if (!wdev)
10701                         return -EINVAL;
10702                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10703                     !wdev->netdev)
10704                         return -EINVAL;
10705
10706                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10707                         if (wdev->netdev &&
10708                             !netif_running(wdev->netdev))
10709                                 return -ENETDOWN;
10710                         if (!wdev->netdev && !wdev->p2p_started)
10711                                 return -ENETDOWN;
10712                 }
10713         }
10714
10715         while (1) {
10716                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10717                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10718                                            NL80211_CMD_VENDOR);
10719                 if (!hdr)
10720                         break;
10721
10722                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10723                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10724                                                wdev_id(wdev),
10725                                                NL80211_ATTR_PAD))) {
10726                         genlmsg_cancel(skb, hdr);
10727                         break;
10728                 }
10729
10730                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10731                 if (!vendor_data) {
10732                         genlmsg_cancel(skb, hdr);
10733                         break;
10734                 }
10735
10736                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10737                                    (unsigned long *)&cb->args[5]);
10738                 nla_nest_end(skb, vendor_data);
10739
10740                 if (err == -ENOBUFS || err == -ENOENT) {
10741                         genlmsg_cancel(skb, hdr);
10742                         break;
10743                 } else if (err) {
10744                         genlmsg_cancel(skb, hdr);
10745                         goto out;
10746                 }
10747
10748                 genlmsg_end(skb, hdr);
10749         }
10750
10751         err = skb->len;
10752  out:
10753         rtnl_unlock();
10754         return err;
10755 }
10756
10757 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10758                                            enum nl80211_commands cmd,
10759                                            enum nl80211_attrs attr,
10760                                            int approxlen)
10761 {
10762         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10763
10764         if (WARN_ON(!rdev->cur_cmd_info))
10765                 return NULL;
10766
10767         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10768                                            rdev->cur_cmd_info->snd_portid,
10769                                            rdev->cur_cmd_info->snd_seq,
10770                                            cmd, attr, NULL, GFP_KERNEL);
10771 }
10772 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10773
10774 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10775 {
10776         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10777         void *hdr = ((void **)skb->cb)[1];
10778         struct nlattr *data = ((void **)skb->cb)[2];
10779
10780         /* clear CB data for netlink core to own from now on */
10781         memset(skb->cb, 0, sizeof(skb->cb));
10782
10783         if (WARN_ON(!rdev->cur_cmd_info)) {
10784                 kfree_skb(skb);
10785                 return -EINVAL;
10786         }
10787
10788         nla_nest_end(skb, data);
10789         genlmsg_end(skb, hdr);
10790         return genlmsg_reply(skb, rdev->cur_cmd_info);
10791 }
10792 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10793
10794 static int nl80211_set_qos_map(struct sk_buff *skb,
10795                                struct genl_info *info)
10796 {
10797         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10798         struct cfg80211_qos_map *qos_map = NULL;
10799         struct net_device *dev = info->user_ptr[1];
10800         u8 *pos, len, num_des, des_len, des;
10801         int ret;
10802
10803         if (!rdev->ops->set_qos_map)
10804                 return -EOPNOTSUPP;
10805
10806         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10807                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10808                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10809
10810                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10811                     len > IEEE80211_QOS_MAP_LEN_MAX)
10812                         return -EINVAL;
10813
10814                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10815                 if (!qos_map)
10816                         return -ENOMEM;
10817
10818                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10819                 if (num_des) {
10820                         des_len = num_des *
10821                                 sizeof(struct cfg80211_dscp_exception);
10822                         memcpy(qos_map->dscp_exception, pos, des_len);
10823                         qos_map->num_des = num_des;
10824                         for (des = 0; des < num_des; des++) {
10825                                 if (qos_map->dscp_exception[des].up > 7) {
10826                                         kfree(qos_map);
10827                                         return -EINVAL;
10828                                 }
10829                         }
10830                         pos += des_len;
10831                 }
10832                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10833         }
10834
10835         wdev_lock(dev->ieee80211_ptr);
10836         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10837         if (!ret)
10838                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10839         wdev_unlock(dev->ieee80211_ptr);
10840
10841         kfree(qos_map);
10842         return ret;
10843 }
10844
10845 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10846 {
10847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10848         struct net_device *dev = info->user_ptr[1];
10849         struct wireless_dev *wdev = dev->ieee80211_ptr;
10850         const u8 *peer;
10851         u8 tsid, up;
10852         u16 admitted_time = 0;
10853         int err;
10854
10855         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10856                 return -EOPNOTSUPP;
10857
10858         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10859             !info->attrs[NL80211_ATTR_USER_PRIO])
10860                 return -EINVAL;
10861
10862         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10863         if (tsid >= IEEE80211_NUM_TIDS)
10864                 return -EINVAL;
10865
10866         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10867         if (up >= IEEE80211_NUM_UPS)
10868                 return -EINVAL;
10869
10870         /* WMM uses TIDs 0-7 even for TSPEC */
10871         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10872                 /* TODO: handle 802.11 TSPEC/admission control
10873                  * need more attributes for that (e.g. BA session requirement);
10874                  * change the WMM adminssion test above to allow both then
10875                  */
10876                 return -EINVAL;
10877         }
10878
10879         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10880
10881         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10882                 admitted_time =
10883                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10884                 if (!admitted_time)
10885                         return -EINVAL;
10886         }
10887
10888         wdev_lock(wdev);
10889         switch (wdev->iftype) {
10890         case NL80211_IFTYPE_STATION:
10891         case NL80211_IFTYPE_P2P_CLIENT:
10892                 if (wdev->current_bss)
10893                         break;
10894                 err = -ENOTCONN;
10895                 goto out;
10896         default:
10897                 err = -EOPNOTSUPP;
10898                 goto out;
10899         }
10900
10901         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10902
10903  out:
10904         wdev_unlock(wdev);
10905         return err;
10906 }
10907
10908 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10909 {
10910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10911         struct net_device *dev = info->user_ptr[1];
10912         struct wireless_dev *wdev = dev->ieee80211_ptr;
10913         const u8 *peer;
10914         u8 tsid;
10915         int err;
10916
10917         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10918                 return -EINVAL;
10919
10920         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10921         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10922
10923         wdev_lock(wdev);
10924         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10925         wdev_unlock(wdev);
10926
10927         return err;
10928 }
10929
10930 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10931                                        struct genl_info *info)
10932 {
10933         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10934         struct net_device *dev = info->user_ptr[1];
10935         struct wireless_dev *wdev = dev->ieee80211_ptr;
10936         struct cfg80211_chan_def chandef = {};
10937         const u8 *addr;
10938         u8 oper_class;
10939         int err;
10940
10941         if (!rdev->ops->tdls_channel_switch ||
10942             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10943                 return -EOPNOTSUPP;
10944
10945         switch (dev->ieee80211_ptr->iftype) {
10946         case NL80211_IFTYPE_STATION:
10947         case NL80211_IFTYPE_P2P_CLIENT:
10948                 break;
10949         default:
10950                 return -EOPNOTSUPP;
10951         }
10952
10953         if (!info->attrs[NL80211_ATTR_MAC] ||
10954             !info->attrs[NL80211_ATTR_OPER_CLASS])
10955                 return -EINVAL;
10956
10957         err = nl80211_parse_chandef(rdev, info, &chandef);
10958         if (err)
10959                 return err;
10960
10961         /*
10962          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10963          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10964          * specification is not defined for them.
10965          */
10966         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10967             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10968             chandef.width != NL80211_CHAN_WIDTH_20)
10969                 return -EINVAL;
10970
10971         /* we will be active on the TDLS link */
10972         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10973                                            wdev->iftype))
10974                 return -EINVAL;
10975
10976         /* don't allow switching to DFS channels */
10977         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10978                 return -EINVAL;
10979
10980         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10981         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10982
10983         wdev_lock(wdev);
10984         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10985         wdev_unlock(wdev);
10986
10987         return err;
10988 }
10989
10990 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10991                                               struct genl_info *info)
10992 {
10993         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10994         struct net_device *dev = info->user_ptr[1];
10995         struct wireless_dev *wdev = dev->ieee80211_ptr;
10996         const u8 *addr;
10997
10998         if (!rdev->ops->tdls_channel_switch ||
10999             !rdev->ops->tdls_cancel_channel_switch ||
11000             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11001                 return -EOPNOTSUPP;
11002
11003         switch (dev->ieee80211_ptr->iftype) {
11004         case NL80211_IFTYPE_STATION:
11005         case NL80211_IFTYPE_P2P_CLIENT:
11006                 break;
11007         default:
11008                 return -EOPNOTSUPP;
11009         }
11010
11011         if (!info->attrs[NL80211_ATTR_MAC])
11012                 return -EINVAL;
11013
11014         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11015
11016         wdev_lock(wdev);
11017         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
11018         wdev_unlock(wdev);
11019
11020         return 0;
11021 }
11022
11023 #define NL80211_FLAG_NEED_WIPHY         0x01
11024 #define NL80211_FLAG_NEED_NETDEV        0x02
11025 #define NL80211_FLAG_NEED_RTNL          0x04
11026 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
11027 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
11028                                          NL80211_FLAG_CHECK_NETDEV_UP)
11029 #define NL80211_FLAG_NEED_WDEV          0x10
11030 /* If a netdev is associated, it must be UP, P2P must be started */
11031 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
11032                                          NL80211_FLAG_CHECK_NETDEV_UP)
11033 #define NL80211_FLAG_CLEAR_SKB          0x20
11034
11035 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
11036                             struct genl_info *info)
11037 {
11038         struct cfg80211_registered_device *rdev;
11039         struct wireless_dev *wdev;
11040         struct net_device *dev;
11041         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
11042
11043         if (rtnl)
11044                 rtnl_lock();
11045
11046         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11047                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11048                 if (IS_ERR(rdev)) {
11049                         if (rtnl)
11050                                 rtnl_unlock();
11051                         return PTR_ERR(rdev);
11052                 }
11053                 info->user_ptr[0] = rdev;
11054         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11055                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11056                 ASSERT_RTNL();
11057
11058                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11059                                                   info->attrs);
11060                 if (IS_ERR(wdev)) {
11061                         if (rtnl)
11062                                 rtnl_unlock();
11063                         return PTR_ERR(wdev);
11064                 }
11065
11066                 dev = wdev->netdev;
11067                 rdev = wiphy_to_rdev(wdev->wiphy);
11068
11069                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11070                         if (!dev) {
11071                                 if (rtnl)
11072                                         rtnl_unlock();
11073                                 return -EINVAL;
11074                         }
11075
11076                         info->user_ptr[1] = dev;
11077                 } else {
11078                         info->user_ptr[1] = wdev;
11079                 }
11080
11081                 if (dev) {
11082                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11083                             !netif_running(dev)) {
11084                                 if (rtnl)
11085                                         rtnl_unlock();
11086                                 return -ENETDOWN;
11087                         }
11088
11089                         dev_hold(dev);
11090                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11091                         if (!wdev->p2p_started) {
11092                                 if (rtnl)
11093                                         rtnl_unlock();
11094                                 return -ENETDOWN;
11095                         }
11096                 }
11097
11098                 info->user_ptr[0] = rdev;
11099         }
11100
11101         return 0;
11102 }
11103
11104 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11105                               struct genl_info *info)
11106 {
11107         if (info->user_ptr[1]) {
11108                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11109                         struct wireless_dev *wdev = info->user_ptr[1];
11110
11111                         if (wdev->netdev)
11112                                 dev_put(wdev->netdev);
11113                 } else {
11114                         dev_put(info->user_ptr[1]);
11115                 }
11116         }
11117
11118         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11119                 rtnl_unlock();
11120
11121         /* If needed, clear the netlink message payload from the SKB
11122          * as it might contain key data that shouldn't stick around on
11123          * the heap after the SKB is freed. The netlink message header
11124          * is still needed for further processing, so leave it intact.
11125          */
11126         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11127                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11128
11129                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11130         }
11131 }
11132
11133 static const struct genl_ops nl80211_ops[] = {
11134         {
11135                 .cmd = NL80211_CMD_GET_WIPHY,
11136                 .doit = nl80211_get_wiphy,
11137                 .dumpit = nl80211_dump_wiphy,
11138                 .done = nl80211_dump_wiphy_done,
11139                 .policy = nl80211_policy,
11140                 /* can be retrieved by unprivileged users */
11141                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11142                                   NL80211_FLAG_NEED_RTNL,
11143         },
11144         {
11145                 .cmd = NL80211_CMD_SET_WIPHY,
11146                 .doit = nl80211_set_wiphy,
11147                 .policy = nl80211_policy,
11148                 .flags = GENL_UNS_ADMIN_PERM,
11149                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11150         },
11151         {
11152                 .cmd = NL80211_CMD_GET_INTERFACE,
11153                 .doit = nl80211_get_interface,
11154                 .dumpit = nl80211_dump_interface,
11155                 .policy = nl80211_policy,
11156                 /* can be retrieved by unprivileged users */
11157                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11158                                   NL80211_FLAG_NEED_RTNL,
11159         },
11160         {
11161                 .cmd = NL80211_CMD_SET_INTERFACE,
11162                 .doit = nl80211_set_interface,
11163                 .policy = nl80211_policy,
11164                 .flags = GENL_UNS_ADMIN_PERM,
11165                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11166                                   NL80211_FLAG_NEED_RTNL,
11167         },
11168         {
11169                 .cmd = NL80211_CMD_NEW_INTERFACE,
11170                 .doit = nl80211_new_interface,
11171                 .policy = nl80211_policy,
11172                 .flags = GENL_UNS_ADMIN_PERM,
11173                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11174                                   NL80211_FLAG_NEED_RTNL,
11175         },
11176         {
11177                 .cmd = NL80211_CMD_DEL_INTERFACE,
11178                 .doit = nl80211_del_interface,
11179                 .policy = nl80211_policy,
11180                 .flags = GENL_UNS_ADMIN_PERM,
11181                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11182                                   NL80211_FLAG_NEED_RTNL,
11183         },
11184         {
11185                 .cmd = NL80211_CMD_GET_KEY,
11186                 .doit = nl80211_get_key,
11187                 .policy = nl80211_policy,
11188                 .flags = GENL_UNS_ADMIN_PERM,
11189                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11190                                   NL80211_FLAG_NEED_RTNL,
11191         },
11192         {
11193                 .cmd = NL80211_CMD_SET_KEY,
11194                 .doit = nl80211_set_key,
11195                 .policy = nl80211_policy,
11196                 .flags = GENL_UNS_ADMIN_PERM,
11197                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11198                                   NL80211_FLAG_NEED_RTNL |
11199                                   NL80211_FLAG_CLEAR_SKB,
11200         },
11201         {
11202                 .cmd = NL80211_CMD_NEW_KEY,
11203                 .doit = nl80211_new_key,
11204                 .policy = nl80211_policy,
11205                 .flags = GENL_UNS_ADMIN_PERM,
11206                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11207                                   NL80211_FLAG_NEED_RTNL |
11208                                   NL80211_FLAG_CLEAR_SKB,
11209         },
11210         {
11211                 .cmd = NL80211_CMD_DEL_KEY,
11212                 .doit = nl80211_del_key,
11213                 .policy = nl80211_policy,
11214                 .flags = GENL_UNS_ADMIN_PERM,
11215                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11216                                   NL80211_FLAG_NEED_RTNL,
11217         },
11218         {
11219                 .cmd = NL80211_CMD_SET_BEACON,
11220                 .policy = nl80211_policy,
11221                 .flags = GENL_UNS_ADMIN_PERM,
11222                 .doit = nl80211_set_beacon,
11223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11224                                   NL80211_FLAG_NEED_RTNL,
11225         },
11226         {
11227                 .cmd = NL80211_CMD_START_AP,
11228                 .policy = nl80211_policy,
11229                 .flags = GENL_UNS_ADMIN_PERM,
11230                 .doit = nl80211_start_ap,
11231                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11232                                   NL80211_FLAG_NEED_RTNL,
11233         },
11234         {
11235                 .cmd = NL80211_CMD_STOP_AP,
11236                 .policy = nl80211_policy,
11237                 .flags = GENL_UNS_ADMIN_PERM,
11238                 .doit = nl80211_stop_ap,
11239                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11240                                   NL80211_FLAG_NEED_RTNL,
11241         },
11242         {
11243                 .cmd = NL80211_CMD_GET_STATION,
11244                 .doit = nl80211_get_station,
11245                 .dumpit = nl80211_dump_station,
11246                 .policy = nl80211_policy,
11247                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11248                                   NL80211_FLAG_NEED_RTNL,
11249         },
11250         {
11251                 .cmd = NL80211_CMD_SET_STATION,
11252                 .doit = nl80211_set_station,
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_NEW_STATION,
11260                 .doit = nl80211_new_station,
11261                 .policy = nl80211_policy,
11262                 .flags = GENL_UNS_ADMIN_PERM,
11263                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11264                                   NL80211_FLAG_NEED_RTNL,
11265         },
11266         {
11267                 .cmd = NL80211_CMD_DEL_STATION,
11268                 .doit = nl80211_del_station,
11269                 .policy = nl80211_policy,
11270                 .flags = GENL_UNS_ADMIN_PERM,
11271                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11272                                   NL80211_FLAG_NEED_RTNL,
11273         },
11274         {
11275                 .cmd = NL80211_CMD_GET_MPATH,
11276                 .doit = nl80211_get_mpath,
11277                 .dumpit = nl80211_dump_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_GET_MPP,
11285                 .doit = nl80211_get_mpp,
11286                 .dumpit = nl80211_dump_mpp,
11287                 .policy = nl80211_policy,
11288                 .flags = GENL_UNS_ADMIN_PERM,
11289                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11290                                   NL80211_FLAG_NEED_RTNL,
11291         },
11292         {
11293                 .cmd = NL80211_CMD_SET_MPATH,
11294                 .doit = nl80211_set_mpath,
11295                 .policy = nl80211_policy,
11296                 .flags = GENL_UNS_ADMIN_PERM,
11297                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11298                                   NL80211_FLAG_NEED_RTNL,
11299         },
11300         {
11301                 .cmd = NL80211_CMD_NEW_MPATH,
11302                 .doit = nl80211_new_mpath,
11303                 .policy = nl80211_policy,
11304                 .flags = GENL_UNS_ADMIN_PERM,
11305                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11306                                   NL80211_FLAG_NEED_RTNL,
11307         },
11308         {
11309                 .cmd = NL80211_CMD_DEL_MPATH,
11310                 .doit = nl80211_del_mpath,
11311                 .policy = nl80211_policy,
11312                 .flags = GENL_UNS_ADMIN_PERM,
11313                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11314                                   NL80211_FLAG_NEED_RTNL,
11315         },
11316         {
11317                 .cmd = NL80211_CMD_SET_BSS,
11318                 .doit = nl80211_set_bss,
11319                 .policy = nl80211_policy,
11320                 .flags = GENL_UNS_ADMIN_PERM,
11321                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11322                                   NL80211_FLAG_NEED_RTNL,
11323         },
11324         {
11325                 .cmd = NL80211_CMD_GET_REG,
11326                 .doit = nl80211_get_reg_do,
11327                 .dumpit = nl80211_get_reg_dump,
11328                 .policy = nl80211_policy,
11329                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11330                 /* can be retrieved by unprivileged users */
11331         },
11332 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11333         {
11334                 .cmd = NL80211_CMD_SET_REG,
11335                 .doit = nl80211_set_reg,
11336                 .policy = nl80211_policy,
11337                 .flags = GENL_ADMIN_PERM,
11338                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11339         },
11340 #endif
11341         {
11342                 .cmd = NL80211_CMD_REQ_SET_REG,
11343                 .doit = nl80211_req_set_reg,
11344                 .policy = nl80211_policy,
11345                 .flags = GENL_ADMIN_PERM,
11346         },
11347         {
11348                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11349                 .doit = nl80211_get_mesh_config,
11350                 .policy = nl80211_policy,
11351                 /* can be retrieved by unprivileged users */
11352                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11353                                   NL80211_FLAG_NEED_RTNL,
11354         },
11355         {
11356                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11357                 .doit = nl80211_update_mesh_config,
11358                 .policy = nl80211_policy,
11359                 .flags = GENL_UNS_ADMIN_PERM,
11360                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11361                                   NL80211_FLAG_NEED_RTNL,
11362         },
11363         {
11364                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11365                 .doit = nl80211_trigger_scan,
11366                 .policy = nl80211_policy,
11367                 .flags = GENL_UNS_ADMIN_PERM,
11368                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11369                                   NL80211_FLAG_NEED_RTNL,
11370         },
11371         {
11372                 .cmd = NL80211_CMD_ABORT_SCAN,
11373                 .doit = nl80211_abort_scan,
11374                 .policy = nl80211_policy,
11375                 .flags = GENL_UNS_ADMIN_PERM,
11376                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11377                                   NL80211_FLAG_NEED_RTNL,
11378         },
11379         {
11380                 .cmd = NL80211_CMD_GET_SCAN,
11381                 .policy = nl80211_policy,
11382                 .dumpit = nl80211_dump_scan,
11383         },
11384         {
11385                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11386                 .doit = nl80211_start_sched_scan,
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_STOP_SCHED_SCAN,
11394                 .doit = nl80211_stop_sched_scan,
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_AUTHENTICATE,
11402                 .doit = nl80211_authenticate,
11403                 .policy = nl80211_policy,
11404                 .flags = GENL_UNS_ADMIN_PERM,
11405                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11406                                   NL80211_FLAG_NEED_RTNL |
11407                                   NL80211_FLAG_CLEAR_SKB,
11408         },
11409         {
11410                 .cmd = NL80211_CMD_ASSOCIATE,
11411                 .doit = nl80211_associate,
11412                 .policy = nl80211_policy,
11413                 .flags = GENL_UNS_ADMIN_PERM,
11414                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11415                                   NL80211_FLAG_NEED_RTNL,
11416         },
11417         {
11418                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11419                 .doit = nl80211_deauthenticate,
11420                 .policy = nl80211_policy,
11421                 .flags = GENL_UNS_ADMIN_PERM,
11422                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11423                                   NL80211_FLAG_NEED_RTNL,
11424         },
11425         {
11426                 .cmd = NL80211_CMD_DISASSOCIATE,
11427                 .doit = nl80211_disassociate,
11428                 .policy = nl80211_policy,
11429                 .flags = GENL_UNS_ADMIN_PERM,
11430                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11431                                   NL80211_FLAG_NEED_RTNL,
11432         },
11433         {
11434                 .cmd = NL80211_CMD_JOIN_IBSS,
11435                 .doit = nl80211_join_ibss,
11436                 .policy = nl80211_policy,
11437                 .flags = GENL_UNS_ADMIN_PERM,
11438                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11439                                   NL80211_FLAG_NEED_RTNL,
11440         },
11441         {
11442                 .cmd = NL80211_CMD_LEAVE_IBSS,
11443                 .doit = nl80211_leave_ibss,
11444                 .policy = nl80211_policy,
11445                 .flags = GENL_UNS_ADMIN_PERM,
11446                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11447                                   NL80211_FLAG_NEED_RTNL,
11448         },
11449 #ifdef CONFIG_NL80211_TESTMODE
11450         {
11451                 .cmd = NL80211_CMD_TESTMODE,
11452                 .doit = nl80211_testmode_do,
11453                 .dumpit = nl80211_testmode_dump,
11454                 .policy = nl80211_policy,
11455                 .flags = GENL_UNS_ADMIN_PERM,
11456                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11457                                   NL80211_FLAG_NEED_RTNL,
11458         },
11459 #endif
11460         {
11461                 .cmd = NL80211_CMD_CONNECT,
11462                 .doit = nl80211_connect,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_UNS_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_DISCONNECT,
11470                 .doit = nl80211_disconnect,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_UNS_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476         {
11477                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11478                 .doit = nl80211_wiphy_netns,
11479                 .policy = nl80211_policy,
11480                 .flags = GENL_UNS_ADMIN_PERM,
11481                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11482                                   NL80211_FLAG_NEED_RTNL,
11483         },
11484         {
11485                 .cmd = NL80211_CMD_GET_SURVEY,
11486                 .policy = nl80211_policy,
11487                 .dumpit = nl80211_dump_survey,
11488         },
11489         {
11490                 .cmd = NL80211_CMD_SET_PMKSA,
11491                 .doit = nl80211_setdel_pmksa,
11492                 .policy = nl80211_policy,
11493                 .flags = GENL_UNS_ADMIN_PERM,
11494                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11495                                   NL80211_FLAG_NEED_RTNL,
11496         },
11497         {
11498                 .cmd = NL80211_CMD_DEL_PMKSA,
11499                 .doit = nl80211_setdel_pmksa,
11500                 .policy = nl80211_policy,
11501                 .flags = GENL_UNS_ADMIN_PERM,
11502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11503                                   NL80211_FLAG_NEED_RTNL,
11504         },
11505         {
11506                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11507                 .doit = nl80211_flush_pmksa,
11508                 .policy = nl80211_policy,
11509                 .flags = GENL_UNS_ADMIN_PERM,
11510                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11511                                   NL80211_FLAG_NEED_RTNL,
11512         },
11513         {
11514                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11515                 .doit = nl80211_remain_on_channel,
11516                 .policy = nl80211_policy,
11517                 .flags = GENL_UNS_ADMIN_PERM,
11518                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11519                                   NL80211_FLAG_NEED_RTNL,
11520         },
11521         {
11522                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11523                 .doit = nl80211_cancel_remain_on_channel,
11524                 .policy = nl80211_policy,
11525                 .flags = GENL_UNS_ADMIN_PERM,
11526                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11527                                   NL80211_FLAG_NEED_RTNL,
11528         },
11529         {
11530                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11531                 .doit = nl80211_set_tx_bitrate_mask,
11532                 .policy = nl80211_policy,
11533                 .flags = GENL_UNS_ADMIN_PERM,
11534                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11535                                   NL80211_FLAG_NEED_RTNL,
11536         },
11537         {
11538                 .cmd = NL80211_CMD_REGISTER_FRAME,
11539                 .doit = nl80211_register_mgmt,
11540                 .policy = nl80211_policy,
11541                 .flags = GENL_UNS_ADMIN_PERM,
11542                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11543                                   NL80211_FLAG_NEED_RTNL,
11544         },
11545         {
11546                 .cmd = NL80211_CMD_FRAME,
11547                 .doit = nl80211_tx_mgmt,
11548                 .policy = nl80211_policy,
11549                 .flags = GENL_UNS_ADMIN_PERM,
11550                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11551                                   NL80211_FLAG_NEED_RTNL,
11552         },
11553         {
11554                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11555                 .doit = nl80211_tx_mgmt_cancel_wait,
11556                 .policy = nl80211_policy,
11557                 .flags = GENL_UNS_ADMIN_PERM,
11558                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11559                                   NL80211_FLAG_NEED_RTNL,
11560         },
11561         {
11562                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11563                 .doit = nl80211_set_power_save,
11564                 .policy = nl80211_policy,
11565                 .flags = GENL_UNS_ADMIN_PERM,
11566                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11567                                   NL80211_FLAG_NEED_RTNL,
11568         },
11569         {
11570                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11571                 .doit = nl80211_get_power_save,
11572                 .policy = nl80211_policy,
11573                 /* can be retrieved by unprivileged users */
11574                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11575                                   NL80211_FLAG_NEED_RTNL,
11576         },
11577         {
11578                 .cmd = NL80211_CMD_SET_CQM,
11579                 .doit = nl80211_set_cqm,
11580                 .policy = nl80211_policy,
11581                 .flags = GENL_UNS_ADMIN_PERM,
11582                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11583                                   NL80211_FLAG_NEED_RTNL,
11584         },
11585         {
11586                 .cmd = NL80211_CMD_SET_CHANNEL,
11587                 .doit = nl80211_set_channel,
11588                 .policy = nl80211_policy,
11589                 .flags = GENL_UNS_ADMIN_PERM,
11590                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11591                                   NL80211_FLAG_NEED_RTNL,
11592         },
11593         {
11594                 .cmd = NL80211_CMD_SET_WDS_PEER,
11595                 .doit = nl80211_set_wds_peer,
11596                 .policy = nl80211_policy,
11597                 .flags = GENL_UNS_ADMIN_PERM,
11598                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11599                                   NL80211_FLAG_NEED_RTNL,
11600         },
11601         {
11602                 .cmd = NL80211_CMD_JOIN_MESH,
11603                 .doit = nl80211_join_mesh,
11604                 .policy = nl80211_policy,
11605                 .flags = GENL_UNS_ADMIN_PERM,
11606                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11607                                   NL80211_FLAG_NEED_RTNL,
11608         },
11609         {
11610                 .cmd = NL80211_CMD_LEAVE_MESH,
11611                 .doit = nl80211_leave_mesh,
11612                 .policy = nl80211_policy,
11613                 .flags = GENL_UNS_ADMIN_PERM,
11614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11615                                   NL80211_FLAG_NEED_RTNL,
11616         },
11617         {
11618                 .cmd = NL80211_CMD_JOIN_OCB,
11619                 .doit = nl80211_join_ocb,
11620                 .policy = nl80211_policy,
11621                 .flags = GENL_UNS_ADMIN_PERM,
11622                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11623                                   NL80211_FLAG_NEED_RTNL,
11624         },
11625         {
11626                 .cmd = NL80211_CMD_LEAVE_OCB,
11627                 .doit = nl80211_leave_ocb,
11628                 .policy = nl80211_policy,
11629                 .flags = GENL_UNS_ADMIN_PERM,
11630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11631                                   NL80211_FLAG_NEED_RTNL,
11632         },
11633 #ifdef CONFIG_PM
11634         {
11635                 .cmd = NL80211_CMD_GET_WOWLAN,
11636                 .doit = nl80211_get_wowlan,
11637                 .policy = nl80211_policy,
11638                 /* can be retrieved by unprivileged users */
11639                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11640                                   NL80211_FLAG_NEED_RTNL,
11641         },
11642         {
11643                 .cmd = NL80211_CMD_SET_WOWLAN,
11644                 .doit = nl80211_set_wowlan,
11645                 .policy = nl80211_policy,
11646                 .flags = GENL_UNS_ADMIN_PERM,
11647                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11648                                   NL80211_FLAG_NEED_RTNL,
11649         },
11650 #endif
11651         {
11652                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11653                 .doit = nl80211_set_rekey_data,
11654                 .policy = nl80211_policy,
11655                 .flags = GENL_UNS_ADMIN_PERM,
11656                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11657                                   NL80211_FLAG_NEED_RTNL |
11658                                   NL80211_FLAG_CLEAR_SKB,
11659         },
11660         {
11661                 .cmd = NL80211_CMD_TDLS_MGMT,
11662                 .doit = nl80211_tdls_mgmt,
11663                 .policy = nl80211_policy,
11664                 .flags = GENL_UNS_ADMIN_PERM,
11665                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11666                                   NL80211_FLAG_NEED_RTNL,
11667         },
11668         {
11669                 .cmd = NL80211_CMD_TDLS_OPER,
11670                 .doit = nl80211_tdls_oper,
11671                 .policy = nl80211_policy,
11672                 .flags = GENL_UNS_ADMIN_PERM,
11673                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11674                                   NL80211_FLAG_NEED_RTNL,
11675         },
11676         {
11677                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11678                 .doit = nl80211_register_unexpected_frame,
11679                 .policy = nl80211_policy,
11680                 .flags = GENL_UNS_ADMIN_PERM,
11681                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11682                                   NL80211_FLAG_NEED_RTNL,
11683         },
11684         {
11685                 .cmd = NL80211_CMD_PROBE_CLIENT,
11686                 .doit = nl80211_probe_client,
11687                 .policy = nl80211_policy,
11688                 .flags = GENL_UNS_ADMIN_PERM,
11689                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11690                                   NL80211_FLAG_NEED_RTNL,
11691         },
11692         {
11693                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11694                 .doit = nl80211_register_beacons,
11695                 .policy = nl80211_policy,
11696                 .flags = GENL_UNS_ADMIN_PERM,
11697                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11698                                   NL80211_FLAG_NEED_RTNL,
11699         },
11700         {
11701                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11702                 .doit = nl80211_set_noack_map,
11703                 .policy = nl80211_policy,
11704                 .flags = GENL_UNS_ADMIN_PERM,
11705                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11706                                   NL80211_FLAG_NEED_RTNL,
11707         },
11708         {
11709                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11710                 .doit = nl80211_start_p2p_device,
11711                 .policy = nl80211_policy,
11712                 .flags = GENL_UNS_ADMIN_PERM,
11713                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11714                                   NL80211_FLAG_NEED_RTNL,
11715         },
11716         {
11717                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11718                 .doit = nl80211_stop_p2p_device,
11719                 .policy = nl80211_policy,
11720                 .flags = GENL_UNS_ADMIN_PERM,
11721                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11722                                   NL80211_FLAG_NEED_RTNL,
11723         },
11724         {
11725                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11726                 .doit = nl80211_set_mcast_rate,
11727                 .policy = nl80211_policy,
11728                 .flags = GENL_UNS_ADMIN_PERM,
11729                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11730                                   NL80211_FLAG_NEED_RTNL,
11731         },
11732         {
11733                 .cmd = NL80211_CMD_SET_MAC_ACL,
11734                 .doit = nl80211_set_mac_acl,
11735                 .policy = nl80211_policy,
11736                 .flags = GENL_UNS_ADMIN_PERM,
11737                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11738                                   NL80211_FLAG_NEED_RTNL,
11739         },
11740         {
11741                 .cmd = NL80211_CMD_RADAR_DETECT,
11742                 .doit = nl80211_start_radar_detection,
11743                 .policy = nl80211_policy,
11744                 .flags = GENL_UNS_ADMIN_PERM,
11745                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11746                                   NL80211_FLAG_NEED_RTNL,
11747         },
11748         {
11749                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11750                 .doit = nl80211_get_protocol_features,
11751                 .policy = nl80211_policy,
11752         },
11753         {
11754                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11755                 .doit = nl80211_update_ft_ies,
11756                 .policy = nl80211_policy,
11757                 .flags = GENL_UNS_ADMIN_PERM,
11758                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11759                                   NL80211_FLAG_NEED_RTNL,
11760         },
11761         {
11762                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11763                 .doit = nl80211_crit_protocol_start,
11764                 .policy = nl80211_policy,
11765                 .flags = GENL_UNS_ADMIN_PERM,
11766                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11767                                   NL80211_FLAG_NEED_RTNL,
11768         },
11769         {
11770                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11771                 .doit = nl80211_crit_protocol_stop,
11772                 .policy = nl80211_policy,
11773                 .flags = GENL_UNS_ADMIN_PERM,
11774                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11775                                   NL80211_FLAG_NEED_RTNL,
11776         },
11777         {
11778                 .cmd = NL80211_CMD_GET_COALESCE,
11779                 .doit = nl80211_get_coalesce,
11780                 .policy = nl80211_policy,
11781                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11782                                   NL80211_FLAG_NEED_RTNL,
11783         },
11784         {
11785                 .cmd = NL80211_CMD_SET_COALESCE,
11786                 .doit = nl80211_set_coalesce,
11787                 .policy = nl80211_policy,
11788                 .flags = GENL_UNS_ADMIN_PERM,
11789                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11790                                   NL80211_FLAG_NEED_RTNL,
11791         },
11792         {
11793                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11794                 .doit = nl80211_channel_switch,
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_VENDOR,
11802                 .doit = nl80211_vendor_cmd,
11803                 .dumpit = nl80211_vendor_cmd_dump,
11804                 .policy = nl80211_policy,
11805                 .flags = GENL_UNS_ADMIN_PERM,
11806                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11807                                   NL80211_FLAG_NEED_RTNL,
11808         },
11809         {
11810                 .cmd = NL80211_CMD_SET_QOS_MAP,
11811                 .doit = nl80211_set_qos_map,
11812                 .policy = nl80211_policy,
11813                 .flags = GENL_UNS_ADMIN_PERM,
11814                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11815                                   NL80211_FLAG_NEED_RTNL,
11816         },
11817         {
11818                 .cmd = NL80211_CMD_ADD_TX_TS,
11819                 .doit = nl80211_add_tx_ts,
11820                 .policy = nl80211_policy,
11821                 .flags = GENL_UNS_ADMIN_PERM,
11822                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11823                                   NL80211_FLAG_NEED_RTNL,
11824         },
11825         {
11826                 .cmd = NL80211_CMD_DEL_TX_TS,
11827                 .doit = nl80211_del_tx_ts,
11828                 .policy = nl80211_policy,
11829                 .flags = GENL_UNS_ADMIN_PERM,
11830                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11831                                   NL80211_FLAG_NEED_RTNL,
11832         },
11833         {
11834                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11835                 .doit = nl80211_tdls_channel_switch,
11836                 .policy = nl80211_policy,
11837                 .flags = GENL_UNS_ADMIN_PERM,
11838                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11839                                   NL80211_FLAG_NEED_RTNL,
11840         },
11841         {
11842                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11843                 .doit = nl80211_tdls_cancel_channel_switch,
11844                 .policy = nl80211_policy,
11845                 .flags = GENL_UNS_ADMIN_PERM,
11846                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11847                                   NL80211_FLAG_NEED_RTNL,
11848         },
11849 };
11850
11851 /* notification functions */
11852
11853 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11854                           enum nl80211_commands cmd)
11855 {
11856         struct sk_buff *msg;
11857         struct nl80211_dump_wiphy_state state = {};
11858
11859         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11860                 cmd != NL80211_CMD_DEL_WIPHY);
11861
11862         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11863         if (!msg)
11864                 return;
11865
11866         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11867                 nlmsg_free(msg);
11868                 return;
11869         }
11870
11871         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11872                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11873 }
11874
11875 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
11876                                 struct wireless_dev *wdev,
11877                                 enum nl80211_commands cmd)
11878 {
11879         struct sk_buff *msg;
11880
11881         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
11882                 cmd != NL80211_CMD_DEL_INTERFACE);
11883
11884         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11885         if (!msg)
11886                 return;
11887
11888         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
11889                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
11890                 nlmsg_free(msg);
11891                 return;
11892         }
11893
11894         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11895                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11896 }
11897
11898 static int nl80211_add_scan_req(struct sk_buff *msg,
11899                                 struct cfg80211_registered_device *rdev)
11900 {
11901         struct cfg80211_scan_request *req = rdev->scan_req;
11902         struct nlattr *nest;
11903         int i;
11904
11905         if (WARN_ON(!req))
11906                 return 0;
11907
11908         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11909         if (!nest)
11910                 goto nla_put_failure;
11911         for (i = 0; i < req->n_ssids; i++) {
11912                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11913                         goto nla_put_failure;
11914         }
11915         nla_nest_end(msg, nest);
11916
11917         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11918         if (!nest)
11919                 goto nla_put_failure;
11920         for (i = 0; i < req->n_channels; i++) {
11921                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11922                         goto nla_put_failure;
11923         }
11924         nla_nest_end(msg, nest);
11925
11926         if (req->ie &&
11927             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11928                 goto nla_put_failure;
11929
11930         if (req->flags &&
11931             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11932                 goto nla_put_failure;
11933
11934         if (req->info.scan_start_tsf &&
11935             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
11936                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
11937              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
11938                      req->info.tsf_bssid)))
11939                 goto nla_put_failure;
11940
11941         return 0;
11942  nla_put_failure:
11943         return -ENOBUFS;
11944 }
11945
11946 static int nl80211_send_scan_msg(struct sk_buff *msg,
11947                                  struct cfg80211_registered_device *rdev,
11948                                  struct wireless_dev *wdev,
11949                                  u32 portid, u32 seq, int flags,
11950                                  u32 cmd)
11951 {
11952         void *hdr;
11953
11954         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11955         if (!hdr)
11956                 return -1;
11957
11958         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11959             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11960                                          wdev->netdev->ifindex)) ||
11961             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11962                               NL80211_ATTR_PAD))
11963                 goto nla_put_failure;
11964
11965         /* ignore errors and send incomplete event anyway */
11966         nl80211_add_scan_req(msg, rdev);
11967
11968         genlmsg_end(msg, hdr);
11969         return 0;
11970
11971  nla_put_failure:
11972         genlmsg_cancel(msg, hdr);
11973         return -EMSGSIZE;
11974 }
11975
11976 static int
11977 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11978                             struct cfg80211_registered_device *rdev,
11979                             struct net_device *netdev,
11980                             u32 portid, u32 seq, int flags, u32 cmd)
11981 {
11982         void *hdr;
11983
11984         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11985         if (!hdr)
11986                 return -1;
11987
11988         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11989             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11990                 goto nla_put_failure;
11991
11992         genlmsg_end(msg, hdr);
11993         return 0;
11994
11995  nla_put_failure:
11996         genlmsg_cancel(msg, hdr);
11997         return -EMSGSIZE;
11998 }
11999
12000 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
12001                              struct wireless_dev *wdev)
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_scan_msg(msg, rdev, wdev, 0, 0, 0,
12010                                   NL80211_CMD_TRIGGER_SCAN) < 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 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
12020                                        struct wireless_dev *wdev, bool aborted)
12021 {
12022         struct sk_buff *msg;
12023
12024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12025         if (!msg)
12026                 return NULL;
12027
12028         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12029                                   aborted ? NL80211_CMD_SCAN_ABORTED :
12030                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
12031                 nlmsg_free(msg);
12032                 return NULL;
12033         }
12034
12035         return msg;
12036 }
12037
12038 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
12039                               struct sk_buff *msg)
12040 {
12041         if (!msg)
12042                 return;
12043
12044         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12045                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12046 }
12047
12048 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12049                                      struct net_device *netdev)
12050 {
12051         struct sk_buff *msg;
12052
12053         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12054         if (!msg)
12055                 return;
12056
12057         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12058                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12059                 nlmsg_free(msg);
12060                 return;
12061         }
12062
12063         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12064                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12065 }
12066
12067 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12068                              struct net_device *netdev, u32 cmd)
12069 {
12070         struct sk_buff *msg;
12071
12072         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12073         if (!msg)
12074                 return;
12075
12076         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12077                 nlmsg_free(msg);
12078                 return;
12079         }
12080
12081         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12082                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12083 }
12084
12085 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12086                                           struct regulatory_request *request)
12087 {
12088         /* Userspace can always count this one always being set */
12089         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12090                 goto nla_put_failure;
12091
12092         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12093                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12094                                NL80211_REGDOM_TYPE_WORLD))
12095                         goto nla_put_failure;
12096         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12097                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12098                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12099                         goto nla_put_failure;
12100         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12101                    request->intersect) {
12102                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12103                                NL80211_REGDOM_TYPE_INTERSECTION))
12104                         goto nla_put_failure;
12105         } else {
12106                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12107                                NL80211_REGDOM_TYPE_COUNTRY) ||
12108                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12109                                    request->alpha2))
12110                         goto nla_put_failure;
12111         }
12112
12113         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12114                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12115
12116                 if (wiphy &&
12117                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12118                         goto nla_put_failure;
12119
12120                 if (wiphy &&
12121                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12122                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12123                         goto nla_put_failure;
12124         }
12125
12126         return true;
12127
12128 nla_put_failure:
12129         return false;
12130 }
12131
12132 /*
12133  * This can happen on global regulatory changes or device specific settings
12134  * based on custom regulatory domains.
12135  */
12136 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12137                                      struct regulatory_request *request)
12138 {
12139         struct sk_buff *msg;
12140         void *hdr;
12141
12142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12143         if (!msg)
12144                 return;
12145
12146         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12147         if (!hdr) {
12148                 nlmsg_free(msg);
12149                 return;
12150         }
12151
12152         if (nl80211_reg_change_event_fill(msg, request) == false)
12153                 goto nla_put_failure;
12154
12155         genlmsg_end(msg, hdr);
12156
12157         rcu_read_lock();
12158         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12159                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12160         rcu_read_unlock();
12161
12162         return;
12163
12164 nla_put_failure:
12165         genlmsg_cancel(msg, hdr);
12166         nlmsg_free(msg);
12167 }
12168
12169 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12170                                     struct net_device *netdev,
12171                                     const u8 *buf, size_t len,
12172                                     enum nl80211_commands cmd, gfp_t gfp,
12173                                     int uapsd_queues)
12174 {
12175         struct sk_buff *msg;
12176         void *hdr;
12177
12178         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12179         if (!msg)
12180                 return;
12181
12182         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12183         if (!hdr) {
12184                 nlmsg_free(msg);
12185                 return;
12186         }
12187
12188         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12189             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12190             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12191                 goto nla_put_failure;
12192
12193         if (uapsd_queues >= 0) {
12194                 struct nlattr *nla_wmm =
12195                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12196                 if (!nla_wmm)
12197                         goto nla_put_failure;
12198
12199                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12200                                uapsd_queues))
12201                         goto nla_put_failure;
12202
12203                 nla_nest_end(msg, nla_wmm);
12204         }
12205
12206         genlmsg_end(msg, hdr);
12207
12208         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12209                                 NL80211_MCGRP_MLME, gfp);
12210         return;
12211
12212  nla_put_failure:
12213         genlmsg_cancel(msg, hdr);
12214         nlmsg_free(msg);
12215 }
12216
12217 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12218                           struct net_device *netdev, const u8 *buf,
12219                           size_t len, gfp_t gfp)
12220 {
12221         nl80211_send_mlme_event(rdev, netdev, buf, len,
12222                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12223 }
12224
12225 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12226                            struct net_device *netdev, const u8 *buf,
12227                            size_t len, gfp_t gfp, int uapsd_queues)
12228 {
12229         nl80211_send_mlme_event(rdev, netdev, buf, len,
12230                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12231 }
12232
12233 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12234                          struct net_device *netdev, const u8 *buf,
12235                          size_t len, gfp_t gfp)
12236 {
12237         nl80211_send_mlme_event(rdev, netdev, buf, len,
12238                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12239 }
12240
12241 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12242                            struct net_device *netdev, const u8 *buf,
12243                            size_t len, gfp_t gfp)
12244 {
12245         nl80211_send_mlme_event(rdev, netdev, buf, len,
12246                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12247 }
12248
12249 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12250                                   size_t len)
12251 {
12252         struct wireless_dev *wdev = dev->ieee80211_ptr;
12253         struct wiphy *wiphy = wdev->wiphy;
12254         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12255         const struct ieee80211_mgmt *mgmt = (void *)buf;
12256         u32 cmd;
12257
12258         if (WARN_ON(len < 2))
12259                 return;
12260
12261         if (ieee80211_is_deauth(mgmt->frame_control))
12262                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12263         else
12264                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12265
12266         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12267         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12268 }
12269 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12270
12271 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12272                                       struct net_device *netdev, int cmd,
12273                                       const u8 *addr, gfp_t gfp)
12274 {
12275         struct sk_buff *msg;
12276         void *hdr;
12277
12278         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12279         if (!msg)
12280                 return;
12281
12282         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12283         if (!hdr) {
12284                 nlmsg_free(msg);
12285                 return;
12286         }
12287
12288         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12289             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12290             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12291             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12292                 goto nla_put_failure;
12293
12294         genlmsg_end(msg, hdr);
12295
12296         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12297                                 NL80211_MCGRP_MLME, gfp);
12298         return;
12299
12300  nla_put_failure:
12301         genlmsg_cancel(msg, hdr);
12302         nlmsg_free(msg);
12303 }
12304
12305 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12306                                struct net_device *netdev, const u8 *addr,
12307                                gfp_t gfp)
12308 {
12309         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12310                                   addr, gfp);
12311 }
12312
12313 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12314                                 struct net_device *netdev, const u8 *addr,
12315                                 gfp_t gfp)
12316 {
12317         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12318                                   addr, gfp);
12319 }
12320
12321 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12322                                  struct net_device *netdev, const u8 *bssid,
12323                                  const u8 *req_ie, size_t req_ie_len,
12324                                  const u8 *resp_ie, size_t resp_ie_len,
12325                                  int status, gfp_t gfp)
12326 {
12327         struct sk_buff *msg;
12328         void *hdr;
12329
12330         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12331         if (!msg)
12332                 return;
12333
12334         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12335         if (!hdr) {
12336                 nlmsg_free(msg);
12337                 return;
12338         }
12339
12340         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12341             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12342             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12343             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12344                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12345                         status) ||
12346             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12347             (req_ie &&
12348              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12349             (resp_ie &&
12350              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12351                 goto nla_put_failure;
12352
12353         genlmsg_end(msg, hdr);
12354
12355         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12356                                 NL80211_MCGRP_MLME, gfp);
12357         return;
12358
12359  nla_put_failure:
12360         genlmsg_cancel(msg, hdr);
12361         nlmsg_free(msg);
12362 }
12363
12364 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12365                          struct net_device *netdev, const u8 *bssid,
12366                          const u8 *req_ie, size_t req_ie_len,
12367                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12368 {
12369         struct sk_buff *msg;
12370         void *hdr;
12371
12372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12373         if (!msg)
12374                 return;
12375
12376         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12377         if (!hdr) {
12378                 nlmsg_free(msg);
12379                 return;
12380         }
12381
12382         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12383             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12384             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12385             (req_ie &&
12386              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12387             (resp_ie &&
12388              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12389                 goto nla_put_failure;
12390
12391         genlmsg_end(msg, hdr);
12392
12393         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12394                                 NL80211_MCGRP_MLME, gfp);
12395         return;
12396
12397  nla_put_failure:
12398         genlmsg_cancel(msg, hdr);
12399         nlmsg_free(msg);
12400 }
12401
12402 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12403                                struct net_device *netdev, u16 reason,
12404                                const u8 *ie, size_t ie_len, bool from_ap)
12405 {
12406         struct sk_buff *msg;
12407         void *hdr;
12408
12409         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12410         if (!msg)
12411                 return;
12412
12413         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12414         if (!hdr) {
12415                 nlmsg_free(msg);
12416                 return;
12417         }
12418
12419         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12420             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12421             (from_ap && reason &&
12422              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12423             (from_ap &&
12424              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12425             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12426                 goto nla_put_failure;
12427
12428         genlmsg_end(msg, hdr);
12429
12430         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12431                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12432         return;
12433
12434  nla_put_failure:
12435         genlmsg_cancel(msg, hdr);
12436         nlmsg_free(msg);
12437 }
12438
12439 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12440                              struct net_device *netdev, const u8 *bssid,
12441                              gfp_t gfp)
12442 {
12443         struct sk_buff *msg;
12444         void *hdr;
12445
12446         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12447         if (!msg)
12448                 return;
12449
12450         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12451         if (!hdr) {
12452                 nlmsg_free(msg);
12453                 return;
12454         }
12455
12456         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12457             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12458             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12459                 goto nla_put_failure;
12460
12461         genlmsg_end(msg, hdr);
12462
12463         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12464                                 NL80211_MCGRP_MLME, gfp);
12465         return;
12466
12467  nla_put_failure:
12468         genlmsg_cancel(msg, hdr);
12469         nlmsg_free(msg);
12470 }
12471
12472 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12473                                         const u8* ie, u8 ie_len, gfp_t gfp)
12474 {
12475         struct wireless_dev *wdev = dev->ieee80211_ptr;
12476         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12477         struct sk_buff *msg;
12478         void *hdr;
12479
12480         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12481                 return;
12482
12483         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12484
12485         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12486         if (!msg)
12487                 return;
12488
12489         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12490         if (!hdr) {
12491                 nlmsg_free(msg);
12492                 return;
12493         }
12494
12495         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12496             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12497             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12498             (ie_len && ie &&
12499              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12500                 goto nla_put_failure;
12501
12502         genlmsg_end(msg, hdr);
12503
12504         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12505                                 NL80211_MCGRP_MLME, gfp);
12506         return;
12507
12508  nla_put_failure:
12509         genlmsg_cancel(msg, hdr);
12510         nlmsg_free(msg);
12511 }
12512 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12513
12514 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12515                                  struct net_device *netdev, const u8 *addr,
12516                                  enum nl80211_key_type key_type, int key_id,
12517                                  const u8 *tsc, gfp_t gfp)
12518 {
12519         struct sk_buff *msg;
12520         void *hdr;
12521
12522         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12523         if (!msg)
12524                 return;
12525
12526         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12527         if (!hdr) {
12528                 nlmsg_free(msg);
12529                 return;
12530         }
12531
12532         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12533             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12534             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12535             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12536             (key_id != -1 &&
12537              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12538             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12539                 goto nla_put_failure;
12540
12541         genlmsg_end(msg, hdr);
12542
12543         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12544                                 NL80211_MCGRP_MLME, gfp);
12545         return;
12546
12547  nla_put_failure:
12548         genlmsg_cancel(msg, hdr);
12549         nlmsg_free(msg);
12550 }
12551
12552 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12553                                     struct ieee80211_channel *channel_before,
12554                                     struct ieee80211_channel *channel_after)
12555 {
12556         struct sk_buff *msg;
12557         void *hdr;
12558         struct nlattr *nl_freq;
12559
12560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12561         if (!msg)
12562                 return;
12563
12564         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12565         if (!hdr) {
12566                 nlmsg_free(msg);
12567                 return;
12568         }
12569
12570         /*
12571          * Since we are applying the beacon hint to a wiphy we know its
12572          * wiphy_idx is valid
12573          */
12574         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12575                 goto nla_put_failure;
12576
12577         /* Before */
12578         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12579         if (!nl_freq)
12580                 goto nla_put_failure;
12581         if (nl80211_msg_put_channel(msg, channel_before, false))
12582                 goto nla_put_failure;
12583         nla_nest_end(msg, nl_freq);
12584
12585         /* After */
12586         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12587         if (!nl_freq)
12588                 goto nla_put_failure;
12589         if (nl80211_msg_put_channel(msg, channel_after, false))
12590                 goto nla_put_failure;
12591         nla_nest_end(msg, nl_freq);
12592
12593         genlmsg_end(msg, hdr);
12594
12595         rcu_read_lock();
12596         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12597                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12598         rcu_read_unlock();
12599
12600         return;
12601
12602 nla_put_failure:
12603         genlmsg_cancel(msg, hdr);
12604         nlmsg_free(msg);
12605 }
12606
12607 static void nl80211_send_remain_on_chan_event(
12608         int cmd, struct cfg80211_registered_device *rdev,
12609         struct wireless_dev *wdev, u64 cookie,
12610         struct ieee80211_channel *chan,
12611         unsigned int duration, gfp_t gfp)
12612 {
12613         struct sk_buff *msg;
12614         void *hdr;
12615
12616         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12617         if (!msg)
12618                 return;
12619
12620         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12621         if (!hdr) {
12622                 nlmsg_free(msg);
12623                 return;
12624         }
12625
12626         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12627             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12628                                          wdev->netdev->ifindex)) ||
12629             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12630                               NL80211_ATTR_PAD) ||
12631             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12632             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12633                         NL80211_CHAN_NO_HT) ||
12634             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12635                               NL80211_ATTR_PAD))
12636                 goto nla_put_failure;
12637
12638         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12639             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12640                 goto nla_put_failure;
12641
12642         genlmsg_end(msg, hdr);
12643
12644         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12645                                 NL80211_MCGRP_MLME, gfp);
12646         return;
12647
12648  nla_put_failure:
12649         genlmsg_cancel(msg, hdr);
12650         nlmsg_free(msg);
12651 }
12652
12653 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12654                                struct ieee80211_channel *chan,
12655                                unsigned int duration, gfp_t gfp)
12656 {
12657         struct wiphy *wiphy = wdev->wiphy;
12658         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12659
12660         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12661         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12662                                           rdev, wdev, cookie, chan,
12663                                           duration, gfp);
12664 }
12665 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12666
12667 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12668                                         struct ieee80211_channel *chan,
12669                                         gfp_t gfp)
12670 {
12671         struct wiphy *wiphy = wdev->wiphy;
12672         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12673
12674         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12675         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12676                                           rdev, wdev, cookie, chan, 0, gfp);
12677 }
12678 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12679
12680 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12681                       struct station_info *sinfo, gfp_t gfp)
12682 {
12683         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12684         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12685         struct sk_buff *msg;
12686
12687         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12688
12689         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12690         if (!msg)
12691                 return;
12692
12693         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12694                                  rdev, dev, mac_addr, sinfo) < 0) {
12695                 nlmsg_free(msg);
12696                 return;
12697         }
12698
12699         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12700                                 NL80211_MCGRP_MLME, gfp);
12701 }
12702 EXPORT_SYMBOL(cfg80211_new_sta);
12703
12704 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12705                             struct station_info *sinfo, gfp_t gfp)
12706 {
12707         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12708         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12709         struct sk_buff *msg;
12710         struct station_info empty_sinfo = {};
12711
12712         if (!sinfo)
12713                 sinfo = &empty_sinfo;
12714
12715         trace_cfg80211_del_sta(dev, mac_addr);
12716
12717         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12718         if (!msg)
12719                 return;
12720
12721         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12722                                  rdev, dev, mac_addr, sinfo) < 0) {
12723                 nlmsg_free(msg);
12724                 return;
12725         }
12726
12727         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12728                                 NL80211_MCGRP_MLME, gfp);
12729 }
12730 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12731
12732 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12733                           enum nl80211_connect_failed_reason reason,
12734                           gfp_t gfp)
12735 {
12736         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12737         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12738         struct sk_buff *msg;
12739         void *hdr;
12740
12741         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12742         if (!msg)
12743                 return;
12744
12745         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12746         if (!hdr) {
12747                 nlmsg_free(msg);
12748                 return;
12749         }
12750
12751         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12752             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12753             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12754                 goto nla_put_failure;
12755
12756         genlmsg_end(msg, hdr);
12757
12758         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12759                                 NL80211_MCGRP_MLME, gfp);
12760         return;
12761
12762  nla_put_failure:
12763         genlmsg_cancel(msg, hdr);
12764         nlmsg_free(msg);
12765 }
12766 EXPORT_SYMBOL(cfg80211_conn_failed);
12767
12768 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12769                                        const u8 *addr, gfp_t gfp)
12770 {
12771         struct wireless_dev *wdev = dev->ieee80211_ptr;
12772         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12773         struct sk_buff *msg;
12774         void *hdr;
12775         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12776
12777         if (!nlportid)
12778                 return false;
12779
12780         msg = nlmsg_new(100, gfp);
12781         if (!msg)
12782                 return true;
12783
12784         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12785         if (!hdr) {
12786                 nlmsg_free(msg);
12787                 return true;
12788         }
12789
12790         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12791             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12792             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12793                 goto nla_put_failure;
12794
12795         genlmsg_end(msg, hdr);
12796         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12797         return true;
12798
12799  nla_put_failure:
12800         genlmsg_cancel(msg, hdr);
12801         nlmsg_free(msg);
12802         return true;
12803 }
12804
12805 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12806                                 const u8 *addr, gfp_t gfp)
12807 {
12808         struct wireless_dev *wdev = dev->ieee80211_ptr;
12809         bool ret;
12810
12811         trace_cfg80211_rx_spurious_frame(dev, addr);
12812
12813         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12814                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12815                 trace_cfg80211_return_bool(false);
12816                 return false;
12817         }
12818         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12819                                          addr, gfp);
12820         trace_cfg80211_return_bool(ret);
12821         return ret;
12822 }
12823 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12824
12825 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12826                                         const u8 *addr, gfp_t gfp)
12827 {
12828         struct wireless_dev *wdev = dev->ieee80211_ptr;
12829         bool ret;
12830
12831         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12832
12833         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12834                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12835                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12836                 trace_cfg80211_return_bool(false);
12837                 return false;
12838         }
12839         ret = __nl80211_unexpected_frame(dev,
12840                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12841                                          addr, gfp);
12842         trace_cfg80211_return_bool(ret);
12843         return ret;
12844 }
12845 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12846
12847 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12848                       struct wireless_dev *wdev, u32 nlportid,
12849                       int freq, int sig_dbm,
12850                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12851 {
12852         struct net_device *netdev = wdev->netdev;
12853         struct sk_buff *msg;
12854         void *hdr;
12855
12856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12857         if (!msg)
12858                 return -ENOMEM;
12859
12860         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12861         if (!hdr) {
12862                 nlmsg_free(msg);
12863                 return -ENOMEM;
12864         }
12865
12866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12867             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12868                                         netdev->ifindex)) ||
12869             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12870                               NL80211_ATTR_PAD) ||
12871             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12872             (sig_dbm &&
12873              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12874             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12875             (flags &&
12876              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12877                 goto nla_put_failure;
12878
12879         genlmsg_end(msg, hdr);
12880
12881         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12882
12883  nla_put_failure:
12884         genlmsg_cancel(msg, hdr);
12885         nlmsg_free(msg);
12886         return -ENOBUFS;
12887 }
12888
12889 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12890                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12891 {
12892         struct wiphy *wiphy = wdev->wiphy;
12893         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12894         struct net_device *netdev = wdev->netdev;
12895         struct sk_buff *msg;
12896         void *hdr;
12897
12898         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12899
12900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12901         if (!msg)
12902                 return;
12903
12904         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12905         if (!hdr) {
12906                 nlmsg_free(msg);
12907                 return;
12908         }
12909
12910         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12911             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12912                                    netdev->ifindex)) ||
12913             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12914                               NL80211_ATTR_PAD) ||
12915             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12916             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12917                               NL80211_ATTR_PAD) ||
12918             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12919                 goto nla_put_failure;
12920
12921         genlmsg_end(msg, hdr);
12922
12923         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12924                                 NL80211_MCGRP_MLME, gfp);
12925         return;
12926
12927  nla_put_failure:
12928         genlmsg_cancel(msg, hdr);
12929         nlmsg_free(msg);
12930 }
12931 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12932
12933 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12934                                             const char *mac, gfp_t gfp)
12935 {
12936         struct wireless_dev *wdev = dev->ieee80211_ptr;
12937         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12938         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12939         void **cb;
12940
12941         if (!msg)
12942                 return NULL;
12943
12944         cb = (void **)msg->cb;
12945
12946         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12947         if (!cb[0]) {
12948                 nlmsg_free(msg);
12949                 return NULL;
12950         }
12951
12952         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12953             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12954                 goto nla_put_failure;
12955
12956         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12957                 goto nla_put_failure;
12958
12959         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12960         if (!cb[1])
12961                 goto nla_put_failure;
12962
12963         cb[2] = rdev;
12964
12965         return msg;
12966  nla_put_failure:
12967         nlmsg_free(msg);
12968         return NULL;
12969 }
12970
12971 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12972 {
12973         void **cb = (void **)msg->cb;
12974         struct cfg80211_registered_device *rdev = cb[2];
12975
12976         nla_nest_end(msg, cb[1]);
12977         genlmsg_end(msg, cb[0]);
12978
12979         memset(msg->cb, 0, sizeof(msg->cb));
12980
12981         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12982                                 NL80211_MCGRP_MLME, gfp);
12983 }
12984
12985 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12986                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12987                               gfp_t gfp)
12988 {
12989         struct sk_buff *msg;
12990
12991         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12992
12993         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12994                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12995                 return;
12996
12997         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12998         if (!msg)
12999                 return;
13000
13001         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
13002                         rssi_event))
13003                 goto nla_put_failure;
13004
13005         cfg80211_send_cqm(msg, gfp);
13006
13007         return;
13008
13009  nla_put_failure:
13010         nlmsg_free(msg);
13011 }
13012 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
13013
13014 void cfg80211_cqm_txe_notify(struct net_device *dev,
13015                              const u8 *peer, u32 num_packets,
13016                              u32 rate, u32 intvl, gfp_t gfp)
13017 {
13018         struct sk_buff *msg;
13019
13020         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13021         if (!msg)
13022                 return;
13023
13024         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
13025                 goto nla_put_failure;
13026
13027         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
13028                 goto nla_put_failure;
13029
13030         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
13031                 goto nla_put_failure;
13032
13033         cfg80211_send_cqm(msg, gfp);
13034         return;
13035
13036  nla_put_failure:
13037         nlmsg_free(msg);
13038 }
13039 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
13040
13041 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
13042                                  const u8 *peer, u32 num_packets, gfp_t gfp)
13043 {
13044         struct sk_buff *msg;
13045
13046         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
13047
13048         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13049         if (!msg)
13050                 return;
13051
13052         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13053                 goto nla_put_failure;
13054
13055         cfg80211_send_cqm(msg, gfp);
13056         return;
13057
13058  nla_put_failure:
13059         nlmsg_free(msg);
13060 }
13061 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13062
13063 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13064 {
13065         struct sk_buff *msg;
13066
13067         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13068         if (!msg)
13069                 return;
13070
13071         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13072                 goto nla_put_failure;
13073
13074         cfg80211_send_cqm(msg, gfp);
13075         return;
13076
13077  nla_put_failure:
13078         nlmsg_free(msg);
13079 }
13080 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13081
13082 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13083                                      struct net_device *netdev, const u8 *bssid,
13084                                      const u8 *replay_ctr, gfp_t gfp)
13085 {
13086         struct sk_buff *msg;
13087         struct nlattr *rekey_attr;
13088         void *hdr;
13089
13090         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13091         if (!msg)
13092                 return;
13093
13094         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13095         if (!hdr) {
13096                 nlmsg_free(msg);
13097                 return;
13098         }
13099
13100         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13101             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13102             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13103                 goto nla_put_failure;
13104
13105         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13106         if (!rekey_attr)
13107                 goto nla_put_failure;
13108
13109         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13110                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13111                 goto nla_put_failure;
13112
13113         nla_nest_end(msg, rekey_attr);
13114
13115         genlmsg_end(msg, hdr);
13116
13117         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13118                                 NL80211_MCGRP_MLME, gfp);
13119         return;
13120
13121  nla_put_failure:
13122         genlmsg_cancel(msg, hdr);
13123         nlmsg_free(msg);
13124 }
13125
13126 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13127                                const u8 *replay_ctr, gfp_t gfp)
13128 {
13129         struct wireless_dev *wdev = dev->ieee80211_ptr;
13130         struct wiphy *wiphy = wdev->wiphy;
13131         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13132
13133         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13134         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13135 }
13136 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13137
13138 static void
13139 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13140                                struct net_device *netdev, int index,
13141                                const u8 *bssid, bool preauth, gfp_t gfp)
13142 {
13143         struct sk_buff *msg;
13144         struct nlattr *attr;
13145         void *hdr;
13146
13147         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13148         if (!msg)
13149                 return;
13150
13151         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13152         if (!hdr) {
13153                 nlmsg_free(msg);
13154                 return;
13155         }
13156
13157         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13158             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13159                 goto nla_put_failure;
13160
13161         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13162         if (!attr)
13163                 goto nla_put_failure;
13164
13165         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13166             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13167             (preauth &&
13168              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13169                 goto nla_put_failure;
13170
13171         nla_nest_end(msg, attr);
13172
13173         genlmsg_end(msg, hdr);
13174
13175         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13176                                 NL80211_MCGRP_MLME, gfp);
13177         return;
13178
13179  nla_put_failure:
13180         genlmsg_cancel(msg, hdr);
13181         nlmsg_free(msg);
13182 }
13183
13184 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13185                                      const u8 *bssid, bool preauth, gfp_t gfp)
13186 {
13187         struct wireless_dev *wdev = dev->ieee80211_ptr;
13188         struct wiphy *wiphy = wdev->wiphy;
13189         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13190
13191         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13192         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13193 }
13194 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13195
13196 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13197                                      struct net_device *netdev,
13198                                      struct cfg80211_chan_def *chandef,
13199                                      gfp_t gfp,
13200                                      enum nl80211_commands notif,
13201                                      u8 count)
13202 {
13203         struct sk_buff *msg;
13204         void *hdr;
13205
13206         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13207         if (!msg)
13208                 return;
13209
13210         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13211         if (!hdr) {
13212                 nlmsg_free(msg);
13213                 return;
13214         }
13215
13216         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13217                 goto nla_put_failure;
13218
13219         if (nl80211_send_chandef(msg, chandef))
13220                 goto nla_put_failure;
13221
13222         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13223             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13224                         goto nla_put_failure;
13225
13226         genlmsg_end(msg, hdr);
13227
13228         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13229                                 NL80211_MCGRP_MLME, gfp);
13230         return;
13231
13232  nla_put_failure:
13233         genlmsg_cancel(msg, hdr);
13234         nlmsg_free(msg);
13235 }
13236
13237 void cfg80211_ch_switch_notify(struct net_device *dev,
13238                                struct cfg80211_chan_def *chandef)
13239 {
13240         struct wireless_dev *wdev = dev->ieee80211_ptr;
13241         struct wiphy *wiphy = wdev->wiphy;
13242         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13243
13244         ASSERT_WDEV_LOCK(wdev);
13245
13246         trace_cfg80211_ch_switch_notify(dev, chandef);
13247
13248         wdev->chandef = *chandef;
13249         wdev->preset_chandef = *chandef;
13250         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13251                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13252 }
13253 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13254
13255 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13256                                        struct cfg80211_chan_def *chandef,
13257                                        u8 count)
13258 {
13259         struct wireless_dev *wdev = dev->ieee80211_ptr;
13260         struct wiphy *wiphy = wdev->wiphy;
13261         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13262
13263         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13264
13265         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13266                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13267 }
13268 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13269
13270 void
13271 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13272                      const struct cfg80211_chan_def *chandef,
13273                      enum nl80211_radar_event event,
13274                      struct net_device *netdev, gfp_t gfp)
13275 {
13276         struct sk_buff *msg;
13277         void *hdr;
13278
13279         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13280         if (!msg)
13281                 return;
13282
13283         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13284         if (!hdr) {
13285                 nlmsg_free(msg);
13286                 return;
13287         }
13288
13289         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13290                 goto nla_put_failure;
13291
13292         /* NOP and radar events don't need a netdev parameter */
13293         if (netdev) {
13294                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13295
13296                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13297                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13298                                       NL80211_ATTR_PAD))
13299                         goto nla_put_failure;
13300         }
13301
13302         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13303                 goto nla_put_failure;
13304
13305         if (nl80211_send_chandef(msg, chandef))
13306                 goto nla_put_failure;
13307
13308         genlmsg_end(msg, hdr);
13309
13310         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13311                                 NL80211_MCGRP_MLME, gfp);
13312         return;
13313
13314  nla_put_failure:
13315         genlmsg_cancel(msg, hdr);
13316         nlmsg_free(msg);
13317 }
13318
13319 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13320                            u64 cookie, bool acked, gfp_t gfp)
13321 {
13322         struct wireless_dev *wdev = dev->ieee80211_ptr;
13323         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13324         struct sk_buff *msg;
13325         void *hdr;
13326
13327         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13328
13329         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13330
13331         if (!msg)
13332                 return;
13333
13334         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13335         if (!hdr) {
13336                 nlmsg_free(msg);
13337                 return;
13338         }
13339
13340         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13341             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13342             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13343             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13344                               NL80211_ATTR_PAD) ||
13345             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13346                 goto nla_put_failure;
13347
13348         genlmsg_end(msg, hdr);
13349
13350         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13351                                 NL80211_MCGRP_MLME, gfp);
13352         return;
13353
13354  nla_put_failure:
13355         genlmsg_cancel(msg, hdr);
13356         nlmsg_free(msg);
13357 }
13358 EXPORT_SYMBOL(cfg80211_probe_status);
13359
13360 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13361                                  const u8 *frame, size_t len,
13362                                  int freq, int sig_dbm)
13363 {
13364         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13365         struct sk_buff *msg;
13366         void *hdr;
13367         struct cfg80211_beacon_registration *reg;
13368
13369         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13370
13371         spin_lock_bh(&rdev->beacon_registrations_lock);
13372         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13373                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13374                 if (!msg) {
13375                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13376                         return;
13377                 }
13378
13379                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13380                 if (!hdr)
13381                         goto nla_put_failure;
13382
13383                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13384                     (freq &&
13385                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13386                     (sig_dbm &&
13387                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13388                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13389                         goto nla_put_failure;
13390
13391                 genlmsg_end(msg, hdr);
13392
13393                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13394         }
13395         spin_unlock_bh(&rdev->beacon_registrations_lock);
13396         return;
13397
13398  nla_put_failure:
13399         spin_unlock_bh(&rdev->beacon_registrations_lock);
13400         if (hdr)
13401                 genlmsg_cancel(msg, hdr);
13402         nlmsg_free(msg);
13403 }
13404 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13405
13406 #ifdef CONFIG_PM
13407 static int cfg80211_net_detect_results(struct sk_buff *msg,
13408                                        struct cfg80211_wowlan_wakeup *wakeup)
13409 {
13410         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13411         struct nlattr *nl_results, *nl_match, *nl_freqs;
13412         int i, j;
13413
13414         nl_results = nla_nest_start(
13415                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13416         if (!nl_results)
13417                 return -EMSGSIZE;
13418
13419         for (i = 0; i < nd->n_matches; i++) {
13420                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13421
13422                 nl_match = nla_nest_start(msg, i);
13423                 if (!nl_match)
13424                         break;
13425
13426                 /* The SSID attribute is optional in nl80211, but for
13427                  * simplicity reasons it's always present in the
13428                  * cfg80211 structure.  If a driver can't pass the
13429                  * SSID, that needs to be changed.  A zero length SSID
13430                  * is still a valid SSID (wildcard), so it cannot be
13431                  * used for this purpose.
13432                  */
13433                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13434                             match->ssid.ssid)) {
13435                         nla_nest_cancel(msg, nl_match);
13436                         goto out;
13437                 }
13438
13439                 if (match->n_channels) {
13440                         nl_freqs = nla_nest_start(
13441                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13442                         if (!nl_freqs) {
13443                                 nla_nest_cancel(msg, nl_match);
13444                                 goto out;
13445                         }
13446
13447                         for (j = 0; j < match->n_channels; j++) {
13448                                 if (nla_put_u32(msg, j, match->channels[j])) {
13449                                         nla_nest_cancel(msg, nl_freqs);
13450                                         nla_nest_cancel(msg, nl_match);
13451                                         goto out;
13452                                 }
13453                         }
13454
13455                         nla_nest_end(msg, nl_freqs);
13456                 }
13457
13458                 nla_nest_end(msg, nl_match);
13459         }
13460
13461 out:
13462         nla_nest_end(msg, nl_results);
13463         return 0;
13464 }
13465
13466 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13467                                    struct cfg80211_wowlan_wakeup *wakeup,
13468                                    gfp_t gfp)
13469 {
13470         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13471         struct sk_buff *msg;
13472         void *hdr;
13473         int size = 200;
13474
13475         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13476
13477         if (wakeup)
13478                 size += wakeup->packet_present_len;
13479
13480         msg = nlmsg_new(size, gfp);
13481         if (!msg)
13482                 return;
13483
13484         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13485         if (!hdr)
13486                 goto free_msg;
13487
13488         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13489             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13490                               NL80211_ATTR_PAD))
13491                 goto free_msg;
13492
13493         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13494                                         wdev->netdev->ifindex))
13495                 goto free_msg;
13496
13497         if (wakeup) {
13498                 struct nlattr *reasons;
13499
13500                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13501                 if (!reasons)
13502                         goto free_msg;
13503
13504                 if (wakeup->disconnect &&
13505                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13506                         goto free_msg;
13507                 if (wakeup->magic_pkt &&
13508                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13509                         goto free_msg;
13510                 if (wakeup->gtk_rekey_failure &&
13511                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13512                         goto free_msg;
13513                 if (wakeup->eap_identity_req &&
13514                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13515                         goto free_msg;
13516                 if (wakeup->four_way_handshake &&
13517                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13518                         goto free_msg;
13519                 if (wakeup->rfkill_release &&
13520                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13521                         goto free_msg;
13522
13523                 if (wakeup->pattern_idx >= 0 &&
13524                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13525                                 wakeup->pattern_idx))
13526                         goto free_msg;
13527
13528                 if (wakeup->tcp_match &&
13529                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13530                         goto free_msg;
13531
13532                 if (wakeup->tcp_connlost &&
13533                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13534                         goto free_msg;
13535
13536                 if (wakeup->tcp_nomoretokens &&
13537                     nla_put_flag(msg,
13538                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13539                         goto free_msg;
13540
13541                 if (wakeup->packet) {
13542                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13543                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13544
13545                         if (!wakeup->packet_80211) {
13546                                 pkt_attr =
13547                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13548                                 len_attr =
13549                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13550                         }
13551
13552                         if (wakeup->packet_len &&
13553                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13554                                 goto free_msg;
13555
13556                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13557                                     wakeup->packet))
13558                                 goto free_msg;
13559                 }
13560
13561                 if (wakeup->net_detect &&
13562                     cfg80211_net_detect_results(msg, wakeup))
13563                                 goto free_msg;
13564
13565                 nla_nest_end(msg, reasons);
13566         }
13567
13568         genlmsg_end(msg, hdr);
13569
13570         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13571                                 NL80211_MCGRP_MLME, gfp);
13572         return;
13573
13574  free_msg:
13575         nlmsg_free(msg);
13576 }
13577 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13578 #endif
13579
13580 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13581                                 enum nl80211_tdls_operation oper,
13582                                 u16 reason_code, gfp_t gfp)
13583 {
13584         struct wireless_dev *wdev = dev->ieee80211_ptr;
13585         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13586         struct sk_buff *msg;
13587         void *hdr;
13588
13589         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13590                                          reason_code);
13591
13592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13593         if (!msg)
13594                 return;
13595
13596         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13597         if (!hdr) {
13598                 nlmsg_free(msg);
13599                 return;
13600         }
13601
13602         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13603             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13604             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13605             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13606             (reason_code > 0 &&
13607              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13608                 goto nla_put_failure;
13609
13610         genlmsg_end(msg, hdr);
13611
13612         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13613                                 NL80211_MCGRP_MLME, gfp);
13614         return;
13615
13616  nla_put_failure:
13617         genlmsg_cancel(msg, hdr);
13618         nlmsg_free(msg);
13619 }
13620 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13621
13622 static int nl80211_netlink_notify(struct notifier_block * nb,
13623                                   unsigned long state,
13624                                   void *_notify)
13625 {
13626         struct netlink_notify *notify = _notify;
13627         struct cfg80211_registered_device *rdev;
13628         struct wireless_dev *wdev;
13629         struct cfg80211_beacon_registration *reg, *tmp;
13630
13631         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13632                 return NOTIFY_DONE;
13633
13634         rcu_read_lock();
13635
13636         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13637                 bool schedule_destroy_work = false;
13638                 bool schedule_scan_stop = false;
13639                 struct cfg80211_sched_scan_request *sched_scan_req =
13640                         rcu_dereference(rdev->sched_scan_req);
13641
13642                 if (sched_scan_req && notify->portid &&
13643                     sched_scan_req->owner_nlportid == notify->portid)
13644                         schedule_scan_stop = true;
13645
13646                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13647                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13648
13649                         if (wdev->owner_nlportid == notify->portid)
13650                                 schedule_destroy_work = true;
13651                 }
13652
13653                 spin_lock_bh(&rdev->beacon_registrations_lock);
13654                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13655                                          list) {
13656                         if (reg->nlportid == notify->portid) {
13657                                 list_del(&reg->list);
13658                                 kfree(reg);
13659                                 break;
13660                         }
13661                 }
13662                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13663
13664                 if (schedule_destroy_work) {
13665                         struct cfg80211_iface_destroy *destroy;
13666
13667                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13668                         if (destroy) {
13669                                 destroy->nlportid = notify->portid;
13670                                 spin_lock(&rdev->destroy_list_lock);
13671                                 list_add(&destroy->list, &rdev->destroy_list);
13672                                 spin_unlock(&rdev->destroy_list_lock);
13673                                 schedule_work(&rdev->destroy_work);
13674                         }
13675                 } else if (schedule_scan_stop) {
13676                         sched_scan_req->owner_nlportid = 0;
13677
13678                         if (rdev->ops->sched_scan_stop &&
13679                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13680                                 schedule_work(&rdev->sched_scan_stop_wk);
13681                 }
13682         }
13683
13684         rcu_read_unlock();
13685
13686         /*
13687          * It is possible that the user space process that is controlling the
13688          * indoor setting disappeared, so notify the regulatory core.
13689          */
13690         regulatory_netlink_notify(notify->portid);
13691         return NOTIFY_OK;
13692 }
13693
13694 static struct notifier_block nl80211_netlink_notifier = {
13695         .notifier_call = nl80211_netlink_notify,
13696 };
13697
13698 void cfg80211_ft_event(struct net_device *netdev,
13699                        struct cfg80211_ft_event_params *ft_event)
13700 {
13701         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13702         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13703         struct sk_buff *msg;
13704         void *hdr;
13705
13706         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13707
13708         if (!ft_event->target_ap)
13709                 return;
13710
13711         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13712         if (!msg)
13713                 return;
13714
13715         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13716         if (!hdr)
13717                 goto out;
13718
13719         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13720             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13721             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13722                 goto out;
13723
13724         if (ft_event->ies &&
13725             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13726                 goto out;
13727         if (ft_event->ric_ies &&
13728             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13729                     ft_event->ric_ies))
13730                 goto out;
13731
13732         genlmsg_end(msg, hdr);
13733
13734         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13735                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13736         return;
13737  out:
13738         nlmsg_free(msg);
13739 }
13740 EXPORT_SYMBOL(cfg80211_ft_event);
13741
13742 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13743 {
13744         struct cfg80211_registered_device *rdev;
13745         struct sk_buff *msg;
13746         void *hdr;
13747         u32 nlportid;
13748
13749         rdev = wiphy_to_rdev(wdev->wiphy);
13750         if (!rdev->crit_proto_nlportid)
13751                 return;
13752
13753         nlportid = rdev->crit_proto_nlportid;
13754         rdev->crit_proto_nlportid = 0;
13755
13756         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13757         if (!msg)
13758                 return;
13759
13760         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13761         if (!hdr)
13762                 goto nla_put_failure;
13763
13764         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13765             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13766                               NL80211_ATTR_PAD))
13767                 goto nla_put_failure;
13768
13769         genlmsg_end(msg, hdr);
13770
13771         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13772         return;
13773
13774  nla_put_failure:
13775         if (hdr)
13776                 genlmsg_cancel(msg, hdr);
13777         nlmsg_free(msg);
13778 }
13779 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13780
13781 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13782 {
13783         struct wiphy *wiphy = wdev->wiphy;
13784         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13785         struct sk_buff *msg;
13786         void *hdr;
13787
13788         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13789         if (!msg)
13790                 return;
13791
13792         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13793         if (!hdr)
13794                 goto out;
13795
13796         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13797             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13798             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13799                               NL80211_ATTR_PAD))
13800                 goto out;
13801
13802         genlmsg_end(msg, hdr);
13803
13804         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13805                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13806         return;
13807  out:
13808         nlmsg_free(msg);
13809 }
13810
13811 /* initialisation/exit functions */
13812
13813 int nl80211_init(void)
13814 {
13815         int err;
13816
13817         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13818                                                    nl80211_mcgrps);
13819         if (err)
13820                 return err;
13821
13822         err = netlink_register_notifier(&nl80211_netlink_notifier);
13823         if (err)
13824                 goto err_out;
13825
13826         return 0;
13827  err_out:
13828         genl_unregister_family(&nl80211_fam);
13829         return err;
13830 }
13831
13832 void nl80211_exit(void)
13833 {
13834         netlink_unregister_notifier(&nl80211_netlink_notifier);
13835         genl_unregister_family(&nl80211_fam);
13836 }