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->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->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                 netdev = __dev_get_by_index(netns, ifindex);
 171                 if (netdev) {
 172                         if (netdev->ieee80211_ptr)
 173                                 tmp = wiphy_to_rdev(
 174                                         netdev->ieee80211_ptr->wiphy);
 175                         else
 176                                 tmp = NULL;
 177
 178                         /* not wireless device -- return error */
 179                         if (!tmp)
 180                                 return ERR_PTR(-EINVAL);
 181
 182                         /* mismatch -- return error */
 183                         if (rdev && tmp != rdev)
 184                                 return ERR_PTR(-EINVAL);
 185
 186                         rdev = tmp;
 187                 }
 188         }
 189
 190         if (!rdev)
 191                 return ERR_PTR(-ENODEV);
 192
 193         if (netns != wiphy_net(&rdev->wiphy))
 194                 return ERR_PTR(-ENODEV);
 195
 196         return rdev;
 197 }
 198
 199 /*
 200  * This function returns a pointer to the driver
 201  * that the genl_info item that is passed refers to.
 202  *
 203  * The result of this can be a PTR_ERR and hence must
 204  * be checked with IS_ERR() for errors.
 205  */
 206 static struct cfg80211_registered_device *
 207 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 208 {
 209         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 210 }
 211
 212 /* policy for the attributes */
 213 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 214         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 215         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 216                                       .len = 20-1 },
 217         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 218
 219         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 220         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 224
 225         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 230         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 231
 232         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 235
 236         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 237         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 238
 239         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 240         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 241                                     .len = WLAN_MAX_KEY_LEN },
 242         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 243         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 244         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 245         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 246         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 247
 248         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 249         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 250         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 251                                        .len = IEEE80211_MAX_DATA_LEN },
 252         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 253                                        .len = IEEE80211_MAX_DATA_LEN },
 254         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 255         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 256         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 257         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 258                                                .len = NL80211_MAX_SUPP_RATES },
 259         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 260         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 261         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 262         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 263                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 264         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 265
 266         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 267         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 268
 269         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 273                                            .len = NL80211_MAX_SUPP_RATES },
 274         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 275
 276         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 277         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 278
 279         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 280
 281         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 282         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 283                               .len = IEEE80211_MAX_DATA_LEN },
 284         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 286
 287         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 288                                 .len = IEEE80211_MAX_SSID_LEN },
 289         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 290         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 291         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 294         [NL80211_ATTR_STA_FLAGS2] = {
 295                 .len = sizeof(struct nl80211_sta_flag_update),
 296         },
 297         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 303         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 304         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 305         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 306                                  .len = WLAN_PMKID_LEN },
 307         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 308         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 309         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 310         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 311                                  .len = IEEE80211_MAX_DATA_LEN },
 312         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 313         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 314         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 315         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 319         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 323         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 327         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 328         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 331         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 332                                          .len = IEEE80211_MAX_DATA_LEN },
 333         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 334                                          .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 336         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 346                                       .len = IEEE80211_MAX_DATA_LEN },
 347         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 350                 .len = NL80211_HT_CAPABILITY_LEN
 351         },
 352         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 353         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 354         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 355         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 356         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 357         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 358         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 359         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 360         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 361         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 362         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 363         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 364         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 365         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 366         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 367         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 369                 .len = NL80211_VHT_CAPABILITY_LEN,
 370         },
 371         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 372         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 373                                   .len = IEEE80211_MAX_DATA_LEN },
 374         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 376         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 377         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 378         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 383         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 384         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 387         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 388                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 389         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 390         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 391         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 394         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 395         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 396         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 397         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 398         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 399         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 401         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 402         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 403         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 404         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 405 };
 406
 407 /* policy for the key attributes */
 408 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 409         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 410         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 411         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 412         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 413         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 414         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 415         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 416         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 417 };
 418
 419 /* policy for the key default flags */
 420 static const struct nla_policy
 421 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 422         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 423         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 424 };
 425
 426 /* policy for WoWLAN attributes */
 427 static const struct nla_policy
 428 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 429         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 430         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 432         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 433         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 438         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 439 };
 440
 441 static const struct nla_policy
 442 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 443         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 444         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 445         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 446         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 447         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 448         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 449         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 450                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 451         },
 452         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 453                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 454         },
 455         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 456         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 457         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 458 };
 459
 460 /* policy for coalesce rule attributes */
 461 static const struct nla_policy
 462 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 463         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 464         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 465         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 466 };
 467
 468 /* policy for GTK rekey offload attributes */
 469 static const struct nla_policy
 470 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 471         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 472         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 473         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 474 };
 475
 476 static const struct nla_policy
 477 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 478         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 479                                                  .len = IEEE80211_MAX_SSID_LEN },
 480         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 481 };
 482
 483 static const struct nla_policy
 484 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 485         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 486         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 487 };
 488
 489 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 490                                      struct netlink_callback *cb,
 491                                      struct cfg80211_registered_device **rdev,
 492                                      struct wireless_dev **wdev)
 493 {
 494         int err;
 495
 496         rtnl_lock();
 497
 498         if (!cb->args[0]) {
 499                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 500                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 501                                   nl80211_policy);
 502                 if (err)
 503                         goto out_unlock;
 504
 505                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 506                                                    nl80211_fam.attrbuf);
 507                 if (IS_ERR(*wdev)) {
 508                         err = PTR_ERR(*wdev);
 509                         goto out_unlock;
 510                 }
 511                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 512                 /* 0 is the first index - add 1 to parse only once */
 513                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 514                 cb->args[1] = (*wdev)->identifier;
 515         } else {
 516                 /* subtract the 1 again here */
 517                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 518                 struct wireless_dev *tmp;
 519
 520                 if (!wiphy) {
 521                         err = -ENODEV;
 522                         goto out_unlock;
 523                 }
 524                 *rdev = wiphy_to_rdev(wiphy);
 525                 *wdev = NULL;
 526
 527                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 528                         if (tmp->identifier == cb->args[1]) {
 529                                 *wdev = tmp;
 530                                 break;
 531                         }
 532                 }
 533
 534                 if (!*wdev) {
 535                         err = -ENODEV;
 536                         goto out_unlock;
 537                 }
 538         }
 539
 540         return 0;
 541  out_unlock:
 542         rtnl_unlock();
 543         return err;
 544 }
 545
 546 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 547 {
 548         rtnl_unlock();
 549 }
 550
 551 /* IE validation */
 552 static bool is_valid_ie_attr(const struct nlattr *attr)
 553 {
 554         const u8 *pos;
 555         int len;
 556
 557         if (!attr)
 558                 return true;
 559
 560         pos = nla_data(attr);
 561         len = nla_len(attr);
 562
 563         while (len) {
 564                 u8 elemlen;
 565
 566                 if (len < 2)
 567                         return false;
 568                 len -= 2;
 569
 570                 elemlen = pos[1];
 571                 if (elemlen > len)
 572                         return false;
 573
 574                 len -= elemlen;
 575                 pos += 2 + elemlen;
 576         }
 577
 578         return true;
 579 }
 580
 581 /* message building helper */
 582 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 583                                    int flags, u8 cmd)
 584 {
 585         /* since there is no private header just add the generic one */
 586         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 587 }
 588
 589 static int nl80211_msg_put_channel(struct sk_buff *msg,
 590                                    struct ieee80211_channel *chan,
 591                                    bool large)
 592 {
 593         /* Some channels must be completely excluded from the
 594          * list to protect old user-space tools from breaking
 595          */
 596         if (!large && chan->flags &
 597             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 598                 return 0;
 599
 600         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 601                         chan->center_freq))
 602                 goto nla_put_failure;
 603
 604         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 605             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 606                 goto nla_put_failure;
 607         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 608                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 609                         goto nla_put_failure;
 610                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 611                         goto nla_put_failure;
 612         }
 613         if (chan->flags & IEEE80211_CHAN_RADAR) {
 614                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 615                         goto nla_put_failure;
 616                 if (large) {
 617                         u32 time;
 618
 619                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 620
 621                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 622                                         chan->dfs_state))
 623                                 goto nla_put_failure;
 624                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 625                                         time))
 626                                 goto nla_put_failure;
 627                         if (nla_put_u32(msg,
 628                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 629                                         chan->dfs_cac_ms))
 630                                 goto nla_put_failure;
 631                 }
 632         }
 633
 634         if (large) {
 635                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 636                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 637                         goto nla_put_failure;
 638                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 639                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 640                         goto nla_put_failure;
 641                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 642                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 643                         goto nla_put_failure;
 644                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 645                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 646                         goto nla_put_failure;
 647                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 648                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 649                         goto nla_put_failure;
 650                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 651                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 652                         goto nla_put_failure;
 653                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 654                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 655                         goto nla_put_failure;
 656                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 657                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 658                         goto nla_put_failure;
 659         }
 660
 661         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 662                         DBM_TO_MBM(chan->max_power)))
 663                 goto nla_put_failure;
 664
 665         return 0;
 666
 667  nla_put_failure:
 668         return -ENOBUFS;
 669 }
 670
 671 /* netlink command implementations */
 672
 673 struct key_parse {
 674         struct key_params p;
 675         int idx;
 676         int type;
 677         bool def, defmgmt;
 678         bool def_uni, def_multi;
 679 };
 680
 681 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 682 {
 683         struct nlattr *tb[NL80211_KEY_MAX + 1];
 684         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 685                                    nl80211_key_policy);
 686         if (err)
 687                 return err;
 688
 689         k->def = !!tb[NL80211_KEY_DEFAULT];
 690         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 691
 692         if (k->def) {
 693                 k->def_uni = true;
 694                 k->def_multi = true;
 695         }
 696         if (k->defmgmt)
 697                 k->def_multi = true;
 698
 699         if (tb[NL80211_KEY_IDX])
 700                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 701
 702         if (tb[NL80211_KEY_DATA]) {
 703                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 704                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 705         }
 706
 707         if (tb[NL80211_KEY_SEQ]) {
 708                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 709                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 710         }
 711
 712         if (tb[NL80211_KEY_CIPHER])
 713                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 714
 715         if (tb[NL80211_KEY_TYPE]) {
 716                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 717                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 718                         return -EINVAL;
 719         }
 720
 721         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 722                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 723                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 724                                        tb[NL80211_KEY_DEFAULT_TYPES],
 725                                        nl80211_key_default_policy);
 726                 if (err)
 727                         return err;
 728
 729                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 730                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 731         }
 732
 733         return 0;
 734 }
 735
 736 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 737 {
 738         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 739                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 740                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 741         }
 742
 743         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 744                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 745                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 746         }
 747
 748         if (info->attrs[NL80211_ATTR_KEY_IDX])
 749                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 750
 751         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 752                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 753
 754         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 755         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 756
 757         if (k->def) {
 758                 k->def_uni = true;
 759                 k->def_multi = true;
 760         }
 761         if (k->defmgmt)
 762                 k->def_multi = true;
 763
 764         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 765                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 766                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 767                         return -EINVAL;
 768         }
 769
 770         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 771                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 772                 int err = nla_parse_nested(
 773                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 774                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 775                                 nl80211_key_default_policy);
 776                 if (err)
 777                         return err;
 778
 779                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 780                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 787 {
 788         int err;
 789
 790         memset(k, 0, sizeof(*k));
 791         k->idx = -1;
 792         k->type = -1;
 793
 794         if (info->attrs[NL80211_ATTR_KEY])
 795                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 796         else
 797                 err = nl80211_parse_key_old(info, k);
 798
 799         if (err)
 800                 return err;
 801
 802         if (k->def && k->defmgmt)
 803                 return -EINVAL;
 804
 805         if (k->defmgmt) {
 806                 if (k->def_uni || !k->def_multi)
 807                         return -EINVAL;
 808         }
 809
 810         if (k->idx != -1) {
 811                 if (k->defmgmt) {
 812                         if (k->idx < 4 || k->idx > 5)
 813                                 return -EINVAL;
 814                 } else if (k->def) {
 815                         if (k->idx < 0 || k->idx > 3)
 816                                 return -EINVAL;
 817                 } else {
 818                         if (k->idx < 0 || k->idx > 5)
 819                                 return -EINVAL;
 820                 }
 821         }
 822
 823         return 0;
 824 }
 825
 826 static struct cfg80211_cached_keys *
 827 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 828                        struct nlattr *keys, bool *no_ht)
 829 {
 830         struct key_parse parse;
 831         struct nlattr *key;
 832         struct cfg80211_cached_keys *result;
 833         int rem, err, def = 0;
 834
 835         result = kzalloc(sizeof(*result), GFP_KERNEL);
 836         if (!result)
 837                 return ERR_PTR(-ENOMEM);
 838
 839         result->def = -1;
 840         result->defmgmt = -1;
 841
 842         nla_for_each_nested(key, keys, rem) {
 843                 memset(&parse, 0, sizeof(parse));
 844                 parse.idx = -1;
 845
 846                 err = nl80211_parse_key_new(key, &parse);
 847                 if (err)
 848                         goto error;
 849                 err = -EINVAL;
 850                 if (!parse.p.key)
 851                         goto error;
 852                 if (parse.idx < 0 || parse.idx > 4)
 853                         goto error;
 854                 if (parse.def) {
 855                         if (def)
 856                                 goto error;
 857                         def = 1;
 858                         result->def = parse.idx;
 859                         if (!parse.def_uni || !parse.def_multi)
 860                                 goto error;
 861                 } else if (parse.defmgmt)
 862                         goto error;
 863                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 864                                                      parse.idx, false, NULL);
 865                 if (err)
 866                         goto error;
 867                 result->params[parse.idx].cipher = parse.p.cipher;
 868                 result->params[parse.idx].key_len = parse.p.key_len;
 869                 result->params[parse.idx].key = result->data[parse.idx];
 870                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 871
 872                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 873                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 874                         if (no_ht)
 875                                 *no_ht = true;
 876                 }
 877         }
 878
 879         return result;
 880  error:
 881         kfree(result);
 882         return ERR_PTR(err);
 883 }
 884
 885 static int nl80211_key_allowed(struct wireless_dev *wdev)
 886 {
 887         ASSERT_WDEV_LOCK(wdev);
 888
 889         switch (wdev->iftype) {
 890         case NL80211_IFTYPE_AP:
 891         case NL80211_IFTYPE_AP_VLAN:
 892         case NL80211_IFTYPE_P2P_GO:
 893         case NL80211_IFTYPE_MESH_POINT:
 894                 break;
 895         case NL80211_IFTYPE_ADHOC:
 896         case NL80211_IFTYPE_STATION:
 897         case NL80211_IFTYPE_P2P_CLIENT:
 898                 if (!wdev->current_bss)
 899                         return -ENOLINK;
 900                 break;
 901         case NL80211_IFTYPE_UNSPECIFIED:
 902         case NL80211_IFTYPE_OCB:
 903         case NL80211_IFTYPE_MONITOR:
 904         case NL80211_IFTYPE_P2P_DEVICE:
 905         case NL80211_IFTYPE_WDS:
 906         case NUM_NL80211_IFTYPES:
 907                 return -EINVAL;
 908         }
 909
 910         return 0;
 911 }
 912
 913 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 914                                                         struct nlattr *tb)
 915 {
 916         struct ieee80211_channel *chan;
 917
 918         if (tb == NULL)
 919                 return NULL;
 920         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 921         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 922                 return NULL;
 923         return chan;
 924 }
 925
 926 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 927 {
 928         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 929         int i;
 930
 931         if (!nl_modes)
 932                 goto nla_put_failure;
 933
 934         i = 0;
 935         while (ifmodes) {
 936                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 937                         goto nla_put_failure;
 938                 ifmodes >>= 1;
 939                 i++;
 940         }
 941
 942         nla_nest_end(msg, nl_modes);
 943         return 0;
 944
 945 nla_put_failure:
 946         return -ENOBUFS;
 947 }
 948
 949 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 950                                           struct sk_buff *msg,
 951                                           bool large)
 952 {
 953         struct nlattr *nl_combis;
 954         int i, j;
 955
 956         nl_combis = nla_nest_start(msg,
 957                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 958         if (!nl_combis)
 959                 goto nla_put_failure;
 960
 961         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 962                 const struct ieee80211_iface_combination *c;
 963                 struct nlattr *nl_combi, *nl_limits;
 964
 965                 c = &wiphy->iface_combinations[i];
 966
 967                 nl_combi = nla_nest_start(msg, i + 1);
 968                 if (!nl_combi)
 969                         goto nla_put_failure;
 970
 971                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 972                 if (!nl_limits)
 973                         goto nla_put_failure;
 974
 975                 for (j = 0; j < c->n_limits; j++) {
 976                         struct nlattr *nl_limit;
 977
 978                         nl_limit = nla_nest_start(msg, j + 1);
 979                         if (!nl_limit)
 980                                 goto nla_put_failure;
 981                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 982                                         c->limits[j].max))
 983                                 goto nla_put_failure;
 984                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 985                                                 c->limits[j].types))
 986                                 goto nla_put_failure;
 987                         nla_nest_end(msg, nl_limit);
 988                 }
 989
 990                 nla_nest_end(msg, nl_limits);
 991
 992                 if (c->beacon_int_infra_match &&
 993                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 994                         goto nla_put_failure;
 995                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 996                                 c->num_different_channels) ||
 997                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 998                                 c->max_interfaces))
 999                         goto nla_put_failure;
1000                 if (large &&
1001                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1002                                 c->radar_detect_widths) ||
1003                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1004                                 c->radar_detect_regions)))
1005                         goto nla_put_failure;
1006
1007                 nla_nest_end(msg, nl_combi);
1008         }
1009
1010         nla_nest_end(msg, nl_combis);
1011
1012         return 0;
1013 nla_put_failure:
1014         return -ENOBUFS;
1015 }
1016
1017 #ifdef CONFIG_PM
1018 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1019                                         struct sk_buff *msg)
1020 {
1021         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1022         struct nlattr *nl_tcp;
1023
1024         if (!tcp)
1025                 return 0;
1026
1027         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1028         if (!nl_tcp)
1029                 return -ENOBUFS;
1030
1031         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1032                         tcp->data_payload_max))
1033                 return -ENOBUFS;
1034
1035         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1036                         tcp->data_payload_max))
1037                 return -ENOBUFS;
1038
1039         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1040                 return -ENOBUFS;
1041
1042         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1043                                 sizeof(*tcp->tok), tcp->tok))
1044                 return -ENOBUFS;
1045
1046         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1047                         tcp->data_interval_max))
1048                 return -ENOBUFS;
1049
1050         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1051                         tcp->wake_payload_max))
1052                 return -ENOBUFS;
1053
1054         nla_nest_end(msg, nl_tcp);
1055         return 0;
1056 }
1057
1058 static int nl80211_send_wowlan(struct sk_buff *msg,
1059                                struct cfg80211_registered_device *rdev,
1060                                bool large)
1061 {
1062         struct nlattr *nl_wowlan;
1063
1064         if (!rdev->wiphy.wowlan)
1065                 return 0;
1066
1067         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1068         if (!nl_wowlan)
1069                 return -ENOBUFS;
1070
1071         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1072              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1073             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1074              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1075             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1076              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1077             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1078              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1079             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1080              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1081             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1082              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1083             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1084              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1085             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1086              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1087                 return -ENOBUFS;
1088
1089         if (rdev->wiphy.wowlan->n_patterns) {
1090                 struct nl80211_pattern_support pat = {
1091                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1092                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1093                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1094                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1095                 };
1096
1097                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1098                             sizeof(pat), &pat))
1099                         return -ENOBUFS;
1100         }
1101
1102         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1103             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1104                         rdev->wiphy.wowlan->max_nd_match_sets))
1105                 return -ENOBUFS;
1106
1107         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1108                 return -ENOBUFS;
1109
1110         nla_nest_end(msg, nl_wowlan);
1111
1112         return 0;
1113 }
1114 #endif
1115
1116 static int nl80211_send_coalesce(struct sk_buff *msg,
1117                                  struct cfg80211_registered_device *rdev)
1118 {
1119         struct nl80211_coalesce_rule_support rule;
1120
1121         if (!rdev->wiphy.coalesce)
1122                 return 0;
1123
1124         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1125         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1126         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1127         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1128         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1129         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1130
1131         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1132                 return -ENOBUFS;
1133
1134         return 0;
1135 }
1136
1137 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1138                                       struct ieee80211_supported_band *sband)
1139 {
1140         struct nlattr *nl_rates, *nl_rate;
1141         struct ieee80211_rate *rate;
1142         int i;
1143
1144         /* add HT info */
1145         if (sband->ht_cap.ht_supported &&
1146             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1147                      sizeof(sband->ht_cap.mcs),
1148                      &sband->ht_cap.mcs) ||
1149              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1150                          sband->ht_cap.cap) ||
1151              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1152                         sband->ht_cap.ampdu_factor) ||
1153              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1154                         sband->ht_cap.ampdu_density)))
1155                 return -ENOBUFS;
1156
1157         /* add VHT info */
1158         if (sband->vht_cap.vht_supported &&
1159             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1160                      sizeof(sband->vht_cap.vht_mcs),
1161                      &sband->vht_cap.vht_mcs) ||
1162              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1163                          sband->vht_cap.cap)))
1164                 return -ENOBUFS;
1165
1166         /* add bitrates */
1167         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1168         if (!nl_rates)
1169                 return -ENOBUFS;
1170
1171         for (i = 0; i < sband->n_bitrates; i++) {
1172                 nl_rate = nla_nest_start(msg, i);
1173                 if (!nl_rate)
1174                         return -ENOBUFS;
1175
1176                 rate = &sband->bitrates[i];
1177                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1178                                 rate->bitrate))
1179                         return -ENOBUFS;
1180                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1181                     nla_put_flag(msg,
1182                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1183                         return -ENOBUFS;
1184
1185                 nla_nest_end(msg, nl_rate);
1186         }
1187
1188         nla_nest_end(msg, nl_rates);
1189
1190         return 0;
1191 }
1192
1193 static int
1194 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1195                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1196 {
1197         u16 stypes;
1198         struct nlattr *nl_ftypes, *nl_ifs;
1199         enum nl80211_iftype ift;
1200         int i;
1201
1202         if (!mgmt_stypes)
1203                 return 0;
1204
1205         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1206         if (!nl_ifs)
1207                 return -ENOBUFS;
1208
1209         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1210                 nl_ftypes = nla_nest_start(msg, ift);
1211                 if (!nl_ftypes)
1212                         return -ENOBUFS;
1213                 i = 0;
1214                 stypes = mgmt_stypes[ift].tx;
1215                 while (stypes) {
1216                         if ((stypes & 1) &&
1217                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1218                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1219                                 return -ENOBUFS;
1220                         stypes >>= 1;
1221                         i++;
1222                 }
1223                 nla_nest_end(msg, nl_ftypes);
1224         }
1225
1226         nla_nest_end(msg, nl_ifs);
1227
1228         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1229         if (!nl_ifs)
1230                 return -ENOBUFS;
1231
1232         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1233                 nl_ftypes = nla_nest_start(msg, ift);
1234                 if (!nl_ftypes)
1235                         return -ENOBUFS;
1236                 i = 0;
1237                 stypes = mgmt_stypes[ift].rx;
1238                 while (stypes) {
1239                         if ((stypes & 1) &&
1240                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1241                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1242                                 return -ENOBUFS;
1243                         stypes >>= 1;
1244                         i++;
1245                 }
1246                 nla_nest_end(msg, nl_ftypes);
1247         }
1248         nla_nest_end(msg, nl_ifs);
1249
1250         return 0;
1251 }
1252
1253 struct nl80211_dump_wiphy_state {
1254         s64 filter_wiphy;
1255         long start;
1256         long split_start, band_start, chan_start;
1257         bool split;
1258 };
1259
1260 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1261                               enum nl80211_commands cmd,
1262                               struct sk_buff *msg, u32 portid, u32 seq,
1263                               int flags, struct nl80211_dump_wiphy_state *state)
1264 {
1265         void *hdr;
1266         struct nlattr *nl_bands, *nl_band;
1267         struct nlattr *nl_freqs, *nl_freq;
1268         struct nlattr *nl_cmds;
1269         enum ieee80211_band band;
1270         struct ieee80211_channel *chan;
1271         int i;
1272         const struct ieee80211_txrx_stypes *mgmt_stypes =
1273                                 rdev->wiphy.mgmt_stypes;
1274         u32 features;
1275
1276         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1277         if (!hdr)
1278                 return -ENOBUFS;
1279
1280         if (WARN_ON(!state))
1281                 return -EINVAL;
1282
1283         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1284             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1285                            wiphy_name(&rdev->wiphy)) ||
1286             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1287                         cfg80211_rdev_list_generation))
1288                 goto nla_put_failure;
1289
1290         if (cmd != NL80211_CMD_NEW_WIPHY)
1291                 goto finish;
1292
1293         switch (state->split_start) {
1294         case 0:
1295                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1296                                rdev->wiphy.retry_short) ||
1297                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1298                                rdev->wiphy.retry_long) ||
1299                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1300                                 rdev->wiphy.frag_threshold) ||
1301                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1302                                 rdev->wiphy.rts_threshold) ||
1303                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1304                                rdev->wiphy.coverage_class) ||
1305                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1306                                rdev->wiphy.max_scan_ssids) ||
1307                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1308                                rdev->wiphy.max_sched_scan_ssids) ||
1309                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1310                                 rdev->wiphy.max_scan_ie_len) ||
1311                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1312                                 rdev->wiphy.max_sched_scan_ie_len) ||
1313                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1314                                rdev->wiphy.max_match_sets) ||
1315                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1316                                 rdev->wiphy.max_sched_scan_plans) ||
1317                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1318                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1319                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1320                                 rdev->wiphy.max_sched_scan_plan_iterations))
1321                         goto nla_put_failure;
1322
1323                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1324                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1325                         goto nla_put_failure;
1326                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1327                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1328                         goto nla_put_failure;
1329                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1330                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1331                         goto nla_put_failure;
1332                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1333                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1334                         goto nla_put_failure;
1335                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1336                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1337                         goto nla_put_failure;
1338                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1339                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1340                         goto nla_put_failure;
1341                 state->split_start++;
1342                 if (state->split)
1343                         break;
1344         case 1:
1345                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1346                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1347                             rdev->wiphy.cipher_suites))
1348                         goto nla_put_failure;
1349
1350                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1351                                rdev->wiphy.max_num_pmkids))
1352                         goto nla_put_failure;
1353
1354                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1355                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1356                         goto nla_put_failure;
1357
1358                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1359                                 rdev->wiphy.available_antennas_tx) ||
1360                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1361                                 rdev->wiphy.available_antennas_rx))
1362                         goto nla_put_failure;
1363
1364                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1365                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1366                                 rdev->wiphy.probe_resp_offload))
1367                         goto nla_put_failure;
1368
1369                 if ((rdev->wiphy.available_antennas_tx ||
1370                      rdev->wiphy.available_antennas_rx) &&
1371                     rdev->ops->get_antenna) {
1372                         u32 tx_ant = 0, rx_ant = 0;
1373                         int res;
1374                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1375                         if (!res) {
1376                                 if (nla_put_u32(msg,
1377                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1378                                                 tx_ant) ||
1379                                     nla_put_u32(msg,
1380                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1381                                                 rx_ant))
1382                                         goto nla_put_failure;
1383                         }
1384                 }
1385
1386                 state->split_start++;
1387                 if (state->split)
1388                         break;
1389         case 2:
1390                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1391                                         rdev->wiphy.interface_modes))
1392                                 goto nla_put_failure;
1393                 state->split_start++;
1394                 if (state->split)
1395                         break;
1396         case 3:
1397                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1398                 if (!nl_bands)
1399                         goto nla_put_failure;
1400
1401                 for (band = state->band_start;
1402                      band < IEEE80211_NUM_BANDS; band++) {
1403                         struct ieee80211_supported_band *sband;
1404
1405                         sband = rdev->wiphy.bands[band];
1406
1407                         if (!sband)
1408                                 continue;
1409
1410                         nl_band = nla_nest_start(msg, band);
1411                         if (!nl_band)
1412                                 goto nla_put_failure;
1413
1414                         switch (state->chan_start) {
1415                         case 0:
1416                                 if (nl80211_send_band_rateinfo(msg, sband))
1417                                         goto nla_put_failure;
1418                                 state->chan_start++;
1419                                 if (state->split)
1420                                         break;
1421                         default:
1422                                 /* add frequencies */
1423                                 nl_freqs = nla_nest_start(
1424                                         msg, NL80211_BAND_ATTR_FREQS);
1425                                 if (!nl_freqs)
1426                                         goto nla_put_failure;
1427
1428                                 for (i = state->chan_start - 1;
1429                                      i < sband->n_channels;
1430                                      i++) {
1431                                         nl_freq = nla_nest_start(msg, i);
1432                                         if (!nl_freq)
1433                                                 goto nla_put_failure;
1434
1435                                         chan = &sband->channels[i];
1436
1437                                         if (nl80211_msg_put_channel(
1438                                                         msg, chan,
1439                                                         state->split))
1440                                                 goto nla_put_failure;
1441
1442                                         nla_nest_end(msg, nl_freq);
1443                                         if (state->split)
1444                                                 break;
1445                                 }
1446                                 if (i < sband->n_channels)
1447                                         state->chan_start = i + 2;
1448                                 else
1449                                         state->chan_start = 0;
1450                                 nla_nest_end(msg, nl_freqs);
1451                         }
1452
1453                         nla_nest_end(msg, nl_band);
1454
1455                         if (state->split) {
1456                                 /* start again here */
1457                                 if (state->chan_start)
1458                                         band--;
1459                                 break;
1460                         }
1461                 }
1462                 nla_nest_end(msg, nl_bands);
1463
1464                 if (band < IEEE80211_NUM_BANDS)
1465                         state->band_start = band + 1;
1466                 else
1467                         state->band_start = 0;
1468
1469                 /* if bands & channels are done, continue outside */
1470                 if (state->band_start == 0 && state->chan_start == 0)
1471                         state->split_start++;
1472                 if (state->split)
1473                         break;
1474         case 4:
1475                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1476                 if (!nl_cmds)
1477                         goto nla_put_failure;
1478
1479                 i = 0;
1480 #define CMD(op, n)                                                      \
1481                  do {                                                   \
1482                         if (rdev->ops->op) {                            \
1483                                 i++;                                    \
1484                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1485                                         goto nla_put_failure;           \
1486                         }                                               \
1487                 } while (0)
1488
1489                 CMD(add_virtual_intf, NEW_INTERFACE);
1490                 CMD(change_virtual_intf, SET_INTERFACE);
1491                 CMD(add_key, NEW_KEY);
1492                 CMD(start_ap, START_AP);
1493                 CMD(add_station, NEW_STATION);
1494                 CMD(add_mpath, NEW_MPATH);
1495                 CMD(update_mesh_config, SET_MESH_CONFIG);
1496                 CMD(change_bss, SET_BSS);
1497                 CMD(auth, AUTHENTICATE);
1498                 CMD(assoc, ASSOCIATE);
1499                 CMD(deauth, DEAUTHENTICATE);
1500                 CMD(disassoc, DISASSOCIATE);
1501                 CMD(join_ibss, JOIN_IBSS);
1502                 CMD(join_mesh, JOIN_MESH);
1503                 CMD(set_pmksa, SET_PMKSA);
1504                 CMD(del_pmksa, DEL_PMKSA);
1505                 CMD(flush_pmksa, FLUSH_PMKSA);
1506                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1507                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1508                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1509                 CMD(mgmt_tx, FRAME);
1510                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1511                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1512                         i++;
1513                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1514                                 goto nla_put_failure;
1515                 }
1516                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1517                     rdev->ops->join_mesh) {
1518                         i++;
1519                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1520                                 goto nla_put_failure;
1521                 }
1522                 CMD(set_wds_peer, SET_WDS_PEER);
1523                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1524                         CMD(tdls_mgmt, TDLS_MGMT);
1525                         CMD(tdls_oper, TDLS_OPER);
1526                 }
1527                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1528                         CMD(sched_scan_start, START_SCHED_SCAN);
1529                 CMD(probe_client, PROBE_CLIENT);
1530                 CMD(set_noack_map, SET_NOACK_MAP);
1531                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1532                         i++;
1533                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1534                                 goto nla_put_failure;
1535                 }
1536                 CMD(start_p2p_device, START_P2P_DEVICE);
1537                 CMD(set_mcast_rate, SET_MCAST_RATE);
1538 #ifdef CONFIG_NL80211_TESTMODE
1539                 CMD(testmode_cmd, TESTMODE);
1540 #endif
1541                 if (state->split) {
1542                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1543                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1544                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1545                                 CMD(channel_switch, CHANNEL_SWITCH);
1546                         CMD(set_qos_map, SET_QOS_MAP);
1547                         if (rdev->wiphy.features &
1548                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1549                                 CMD(add_tx_ts, ADD_TX_TS);
1550                 }
1551                 /* add into the if now */
1552 #undef CMD
1553
1554                 if (rdev->ops->connect || rdev->ops->auth) {
1555                         i++;
1556                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1557                                 goto nla_put_failure;
1558                 }
1559
1560                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1561                         i++;
1562                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1563                                 goto nla_put_failure;
1564                 }
1565
1566                 nla_nest_end(msg, nl_cmds);
1567                 state->split_start++;
1568                 if (state->split)
1569                         break;
1570         case 5:
1571                 if (rdev->ops->remain_on_channel &&
1572                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1573                     nla_put_u32(msg,
1574                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1575                                 rdev->wiphy.max_remain_on_channel_duration))
1576                         goto nla_put_failure;
1577
1578                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1579                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1580                         goto nla_put_failure;
1581
1582                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1583                         goto nla_put_failure;
1584                 state->split_start++;
1585                 if (state->split)
1586                         break;
1587         case 6:
1588 #ifdef CONFIG_PM
1589                 if (nl80211_send_wowlan(msg, rdev, state->split))
1590                         goto nla_put_failure;
1591                 state->split_start++;
1592                 if (state->split)
1593                         break;
1594 #else
1595                 state->split_start++;
1596 #endif
1597         case 7:
1598                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1599                                         rdev->wiphy.software_iftypes))
1600                         goto nla_put_failure;
1601
1602                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1603                                                    state->split))
1604                         goto nla_put_failure;
1605
1606                 state->split_start++;
1607                 if (state->split)
1608                         break;
1609         case 8:
1610                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1611                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1612                                 rdev->wiphy.ap_sme_capa))
1613                         goto nla_put_failure;
1614
1615                 features = rdev->wiphy.features;
1616                 /*
1617                  * We can only add the per-channel limit information if the
1618                  * dump is split, otherwise it makes it too big. Therefore
1619                  * only advertise it in that case.
1620                  */
1621                 if (state->split)
1622                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1623                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1624                         goto nla_put_failure;
1625
1626                 if (rdev->wiphy.ht_capa_mod_mask &&
1627                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1628                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1629                             rdev->wiphy.ht_capa_mod_mask))
1630                         goto nla_put_failure;
1631
1632                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1633                     rdev->wiphy.max_acl_mac_addrs &&
1634                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1635                                 rdev->wiphy.max_acl_mac_addrs))
1636                         goto nla_put_failure;
1637
1638                 /*
1639                  * Any information below this point is only available to
1640                  * applications that can deal with it being split. This
1641                  * helps ensure that newly added capabilities don't break
1642                  * older tools by overrunning their buffers.
1643                  *
1644                  * We still increment split_start so that in the split
1645                  * case we'll continue with more data in the next round,
1646                  * but break unconditionally so unsplit data stops here.
1647                  */
1648                 state->split_start++;
1649                 break;
1650         case 9:
1651                 if (rdev->wiphy.extended_capabilities &&
1652                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1653                              rdev->wiphy.extended_capabilities_len,
1654                              rdev->wiphy.extended_capabilities) ||
1655                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1656                              rdev->wiphy.extended_capabilities_len,
1657                              rdev->wiphy.extended_capabilities_mask)))
1658                         goto nla_put_failure;
1659
1660                 if (rdev->wiphy.vht_capa_mod_mask &&
1661                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1662                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1663                             rdev->wiphy.vht_capa_mod_mask))
1664                         goto nla_put_failure;
1665
1666                 state->split_start++;
1667                 break;
1668         case 10:
1669                 if (nl80211_send_coalesce(msg, rdev))
1670                         goto nla_put_failure;
1671
1672                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1673                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1674                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1675                         goto nla_put_failure;
1676
1677                 if (rdev->wiphy.max_ap_assoc_sta &&
1678                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1679                                 rdev->wiphy.max_ap_assoc_sta))
1680                         goto nla_put_failure;
1681
1682                 state->split_start++;
1683                 break;
1684         case 11:
1685                 if (rdev->wiphy.n_vendor_commands) {
1686                         const struct nl80211_vendor_cmd_info *info;
1687                         struct nlattr *nested;
1688
1689                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1690                         if (!nested)
1691                                 goto nla_put_failure;
1692
1693                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1694                                 info = &rdev->wiphy.vendor_commands[i].info;
1695                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1696                                         goto nla_put_failure;
1697                         }
1698                         nla_nest_end(msg, nested);
1699                 }
1700
1701                 if (rdev->wiphy.n_vendor_events) {
1702                         const struct nl80211_vendor_cmd_info *info;
1703                         struct nlattr *nested;
1704
1705                         nested = nla_nest_start(msg,
1706                                                 NL80211_ATTR_VENDOR_EVENTS);
1707                         if (!nested)
1708                                 goto nla_put_failure;
1709
1710                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1711                                 info = &rdev->wiphy.vendor_events[i];
1712                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1713                                         goto nla_put_failure;
1714                         }
1715                         nla_nest_end(msg, nested);
1716                 }
1717                 state->split_start++;
1718                 break;
1719         case 12:
1720                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1721                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1722                                rdev->wiphy.max_num_csa_counters))
1723                         goto nla_put_failure;
1724
1725                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1726                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1727                         goto nla_put_failure;
1728
1729                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1730                             sizeof(rdev->wiphy.ext_features),
1731                             rdev->wiphy.ext_features))
1732                         goto nla_put_failure;
1733
1734                 /* done */
1735                 state->split_start = 0;
1736                 break;
1737         }
1738  finish:
1739         genlmsg_end(msg, hdr);
1740         return 0;
1741
1742  nla_put_failure:
1743         genlmsg_cancel(msg, hdr);
1744         return -EMSGSIZE;
1745 }
1746
1747 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1748                                     struct netlink_callback *cb,
1749                                     struct nl80211_dump_wiphy_state *state)
1750 {
1751         struct nlattr **tb = nl80211_fam.attrbuf;
1752         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1753                               tb, nl80211_fam.maxattr, nl80211_policy);
1754         /* ignore parse errors for backward compatibility */
1755         if (ret)
1756                 return 0;
1757
1758         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1759         if (tb[NL80211_ATTR_WIPHY])
1760                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1761         if (tb[NL80211_ATTR_WDEV])
1762                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1763         if (tb[NL80211_ATTR_IFINDEX]) {
1764                 struct net_device *netdev;
1765                 struct cfg80211_registered_device *rdev;
1766                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1767
1768                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1769                 if (!netdev)
1770                         return -ENODEV;
1771                 if (netdev->ieee80211_ptr) {
1772                         rdev = wiphy_to_rdev(
1773                                 netdev->ieee80211_ptr->wiphy);
1774                         state->filter_wiphy = rdev->wiphy_idx;
1775                 }
1776         }
1777
1778         return 0;
1779 }
1780
1781 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1782 {
1783         int idx = 0, ret;
1784         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1785         struct cfg80211_registered_device *rdev;
1786
1787         rtnl_lock();
1788         if (!state) {
1789                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1790                 if (!state) {
1791                         rtnl_unlock();
1792                         return -ENOMEM;
1793                 }
1794                 state->filter_wiphy = -1;
1795                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1796                 if (ret) {
1797                         kfree(state);
1798                         rtnl_unlock();
1799                         return ret;
1800                 }
1801                 cb->args[0] = (long)state;
1802         }
1803
1804         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1805                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1806                         continue;
1807                 if (++idx <= state->start)
1808                         continue;
1809                 if (state->filter_wiphy != -1 &&
1810                     state->filter_wiphy != rdev->wiphy_idx)
1811                         continue;
1812                 /* attempt to fit multiple wiphy data chunks into the skb */
1813                 do {
1814                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1815                                                  skb,
1816                                                  NETLINK_CB(cb->skb).portid,
1817                                                  cb->nlh->nlmsg_seq,
1818                                                  NLM_F_MULTI, state);
1819                         if (ret < 0) {
1820                                 /*
1821                                  * If sending the wiphy data didn't fit (ENOBUFS
1822                                  * or EMSGSIZE returned), this SKB is still
1823                                  * empty (so it's not too big because another
1824                                  * wiphy dataset is already in the skb) and
1825                                  * we've not tried to adjust the dump allocation
1826                                  * yet ... then adjust the alloc size to be
1827                                  * bigger, and return 1 but with the empty skb.
1828                                  * This results in an empty message being RX'ed
1829                                  * in userspace, but that is ignored.
1830                                  *
1831                                  * We can then retry with the larger buffer.
1832                                  */
1833                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1834                                     !skb->len && !state->split &&
1835                                     cb->min_dump_alloc < 4096) {
1836                                         cb->min_dump_alloc = 4096;
1837                                         state->split_start = 0;
1838                                         rtnl_unlock();
1839                                         return 1;
1840                                 }
1841                                 idx--;
1842                                 break;
1843                         }
1844                 } while (state->split_start > 0);
1845                 break;
1846         }
1847         rtnl_unlock();
1848
1849         state->start = idx;
1850
1851         return skb->len;
1852 }
1853
1854 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1855 {
1856         kfree((void *)cb->args[0]);
1857         return 0;
1858 }
1859
1860 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1861 {
1862         struct sk_buff *msg;
1863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1864         struct nl80211_dump_wiphy_state state = {};
1865
1866         msg = nlmsg_new(4096, GFP_KERNEL);
1867         if (!msg)
1868                 return -ENOMEM;
1869
1870         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1871                                info->snd_portid, info->snd_seq, 0,
1872                                &state) < 0) {
1873                 nlmsg_free(msg);
1874                 return -ENOBUFS;
1875         }
1876
1877         return genlmsg_reply(msg, info);
1878 }
1879
1880 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1881         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1882         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1883         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1884         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1885         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1886 };
1887
1888 static int parse_txq_params(struct nlattr *tb[],
1889                             struct ieee80211_txq_params *txq_params)
1890 {
1891         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1892             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1893             !tb[NL80211_TXQ_ATTR_AIFS])
1894                 return -EINVAL;
1895
1896         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1897         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1898         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1899         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1900         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1901
1902         if (txq_params->ac >= NL80211_NUM_ACS)
1903                 return -EINVAL;
1904
1905         return 0;
1906 }
1907
1908 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1909 {
1910         /*
1911          * You can only set the channel explicitly for WDS interfaces,
1912          * all others have their channel managed via their respective
1913          * "establish a connection" command (connect, join, ...)
1914          *
1915          * For AP/GO and mesh mode, the channel can be set with the
1916          * channel userspace API, but is only stored and passed to the
1917          * low-level driver when the AP starts or the mesh is joined.
1918          * This is for backward compatibility, userspace can also give
1919          * the channel in the start-ap or join-mesh commands instead.
1920          *
1921          * Monitors are special as they are normally slaved to
1922          * whatever else is going on, so they have their own special
1923          * operation to set the monitor channel if possible.
1924          */
1925         return !wdev ||
1926                 wdev->iftype == NL80211_IFTYPE_AP ||
1927                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1928                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1929                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1930 }
1931
1932 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1933                                  struct genl_info *info,
1934                                  struct cfg80211_chan_def *chandef)
1935 {
1936         u32 control_freq;
1937
1938         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1939                 return -EINVAL;
1940
1941         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1942
1943         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1944         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1945         chandef->center_freq1 = control_freq;
1946         chandef->center_freq2 = 0;
1947
1948         /* Primary channel not allowed */
1949         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1950                 return -EINVAL;
1951
1952         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1953                 enum nl80211_channel_type chantype;
1954
1955                 chantype = nla_get_u32(
1956                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1957
1958                 switch (chantype) {
1959                 case NL80211_CHAN_NO_HT:
1960                 case NL80211_CHAN_HT20:
1961                 case NL80211_CHAN_HT40PLUS:
1962                 case NL80211_CHAN_HT40MINUS:
1963                         cfg80211_chandef_create(chandef, chandef->chan,
1964                                                 chantype);
1965                         break;
1966                 default:
1967                         return -EINVAL;
1968                 }
1969         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1970                 chandef->width =
1971                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1972                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1973                         chandef->center_freq1 =
1974                                 nla_get_u32(
1975                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1976                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1977                         chandef->center_freq2 =
1978                                 nla_get_u32(
1979                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1980         }
1981
1982         if (!cfg80211_chandef_valid(chandef))
1983                 return -EINVAL;
1984
1985         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1986                                      IEEE80211_CHAN_DISABLED))
1987                 return -EINVAL;
1988
1989         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1990              chandef->width == NL80211_CHAN_WIDTH_10) &&
1991             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1992                 return -EINVAL;
1993
1994         return 0;
1995 }
1996
1997 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1998                                  struct net_device *dev,
1999                                  struct genl_info *info)
2000 {
2001         struct cfg80211_chan_def chandef;
2002         int result;
2003         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2004         struct wireless_dev *wdev = NULL;
2005
2006         if (dev)
2007                 wdev = dev->ieee80211_ptr;
2008         if (!nl80211_can_set_dev_channel(wdev))
2009                 return -EOPNOTSUPP;
2010         if (wdev)
2011                 iftype = wdev->iftype;
2012
2013         result = nl80211_parse_chandef(rdev, info, &chandef);
2014         if (result)
2015                 return result;
2016
2017         switch (iftype) {
2018         case NL80211_IFTYPE_AP:
2019         case NL80211_IFTYPE_P2P_GO:
2020                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2021                                                    iftype)) {
2022                         result = -EINVAL;
2023                         break;
2024                 }
2025                 if (wdev->beacon_interval) {
2026                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2027                             !(rdev->wiphy.features &
2028                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2029                                 result = -EBUSY;
2030                                 break;
2031                         }
2032
2033                         /* Only allow dynamic channel width changes */
2034                         if (chandef.chan != wdev->preset_chandef.chan) {
2035                                 result = -EBUSY;
2036                                 break;
2037                         }
2038                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2039                         if (result)
2040                                 break;
2041                 }
2042                 wdev->preset_chandef = chandef;
2043                 result = 0;
2044                 break;
2045         case NL80211_IFTYPE_MESH_POINT:
2046                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2047                 break;
2048         case NL80211_IFTYPE_MONITOR:
2049                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2050                 break;
2051         default:
2052                 result = -EINVAL;
2053         }
2054
2055         return result;
2056 }
2057
2058 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2059 {
2060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2061         struct net_device *netdev = info->user_ptr[1];
2062
2063         return __nl80211_set_channel(rdev, netdev, info);
2064 }
2065
2066 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2067 {
2068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2069         struct net_device *dev = info->user_ptr[1];
2070         struct wireless_dev *wdev = dev->ieee80211_ptr;
2071         const u8 *bssid;
2072
2073         if (!info->attrs[NL80211_ATTR_MAC])
2074                 return -EINVAL;
2075
2076         if (netif_running(dev))
2077                 return -EBUSY;
2078
2079         if (!rdev->ops->set_wds_peer)
2080                 return -EOPNOTSUPP;
2081
2082         if (wdev->iftype != NL80211_IFTYPE_WDS)
2083                 return -EOPNOTSUPP;
2084
2085         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2086         return rdev_set_wds_peer(rdev, dev, bssid);
2087 }
2088
2089
2090 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2091 {
2092         struct cfg80211_registered_device *rdev;
2093         struct net_device *netdev = NULL;
2094         struct wireless_dev *wdev;
2095         int result = 0, rem_txq_params = 0;
2096         struct nlattr *nl_txq_params;
2097         u32 changed;
2098         u8 retry_short = 0, retry_long = 0;
2099         u32 frag_threshold = 0, rts_threshold = 0;
2100         u8 coverage_class = 0;
2101
2102         ASSERT_RTNL();
2103
2104         /*
2105          * Try to find the wiphy and netdev. Normally this
2106          * function shouldn't need the netdev, but this is
2107          * done for backward compatibility -- previously
2108          * setting the channel was done per wiphy, but now
2109          * it is per netdev. Previous userland like hostapd
2110          * also passed a netdev to set_wiphy, so that it is
2111          * possible to let that go to the right netdev!
2112          */
2113
2114         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2115                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2116
2117                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2118                 if (netdev && netdev->ieee80211_ptr)
2119                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2120                 else
2121                         netdev = NULL;
2122         }
2123
2124         if (!netdev) {
2125                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2126                                                   info->attrs);
2127                 if (IS_ERR(rdev))
2128                         return PTR_ERR(rdev);
2129                 wdev = NULL;
2130                 netdev = NULL;
2131                 result = 0;
2132         } else
2133                 wdev = netdev->ieee80211_ptr;
2134
2135         /*
2136          * end workaround code, by now the rdev is available
2137          * and locked, and wdev may or may not be NULL.
2138          */
2139
2140         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2141                 result = cfg80211_dev_rename(
2142                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2143
2144         if (result)
2145                 return result;
2146
2147         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2148                 struct ieee80211_txq_params txq_params;
2149                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2150
2151                 if (!rdev->ops->set_txq_params)
2152                         return -EOPNOTSUPP;
2153
2154                 if (!netdev)
2155                         return -EINVAL;
2156
2157                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2158                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2159                         return -EINVAL;
2160
2161                 if (!netif_running(netdev))
2162                         return -ENETDOWN;
2163
2164                 nla_for_each_nested(nl_txq_params,
2165                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2166                                     rem_txq_params) {
2167                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2168                                            nla_data(nl_txq_params),
2169                                            nla_len(nl_txq_params),
2170                                            txq_params_policy);
2171                         if (result)
2172                                 return result;
2173                         result = parse_txq_params(tb, &txq_params);
2174                         if (result)
2175                                 return result;
2176
2177                         result = rdev_set_txq_params(rdev, netdev,
2178                                                      &txq_params);
2179                         if (result)
2180                                 return result;
2181                 }
2182         }
2183
2184         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2185                 result = __nl80211_set_channel(
2186                         rdev,
2187                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2188                         info);
2189                 if (result)
2190                         return result;
2191         }
2192
2193         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2194                 struct wireless_dev *txp_wdev = wdev;
2195                 enum nl80211_tx_power_setting type;
2196                 int idx, mbm = 0;
2197
2198                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2199                         txp_wdev = NULL;
2200
2201                 if (!rdev->ops->set_tx_power)
2202                         return -EOPNOTSUPP;
2203
2204                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2205                 type = nla_get_u32(info->attrs[idx]);
2206
2207                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2208                     (type != NL80211_TX_POWER_AUTOMATIC))
2209                         return -EINVAL;
2210
2211                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2212                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2213                         mbm = nla_get_u32(info->attrs[idx]);
2214                 }
2215
2216                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2217                 if (result)
2218                         return result;
2219         }
2220
2221         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2222             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2223                 u32 tx_ant, rx_ant;
2224                 if ((!rdev->wiphy.available_antennas_tx &&
2225                      !rdev->wiphy.available_antennas_rx) ||
2226                     !rdev->ops->set_antenna)
2227                         return -EOPNOTSUPP;
2228
2229                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2230                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2231
2232                 /* reject antenna configurations which don't match the
2233                  * available antenna masks, except for the "all" mask */
2234                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2235                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2236                         return -EINVAL;
2237
2238                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2239                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2240
2241                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2242                 if (result)
2243                         return result;
2244         }
2245
2246         changed = 0;
2247
2248         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2249                 retry_short = nla_get_u8(
2250                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2251                 if (retry_short == 0)
2252                         return -EINVAL;
2253
2254                 changed |= WIPHY_PARAM_RETRY_SHORT;
2255         }
2256
2257         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2258                 retry_long = nla_get_u8(
2259                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2260                 if (retry_long == 0)
2261                         return -EINVAL;
2262
2263                 changed |= WIPHY_PARAM_RETRY_LONG;
2264         }
2265
2266         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2267                 frag_threshold = nla_get_u32(
2268                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2269                 if (frag_threshold < 256)
2270                         return -EINVAL;
2271
2272                 if (frag_threshold != (u32) -1) {
2273                         /*
2274                          * Fragments (apart from the last one) are required to
2275                          * have even length. Make the fragmentation code
2276                          * simpler by stripping LSB should someone try to use
2277                          * odd threshold value.
2278                          */
2279                         frag_threshold &= ~0x1;
2280                 }
2281                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2282         }
2283
2284         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2285                 rts_threshold = nla_get_u32(
2286                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2287                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2288         }
2289
2290         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2291                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2292                         return -EINVAL;
2293
2294                 coverage_class = nla_get_u8(
2295                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2296                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2297         }
2298
2299         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2300                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2301                         return -EOPNOTSUPP;
2302
2303                 changed |= WIPHY_PARAM_DYN_ACK;
2304         }
2305
2306         if (changed) {
2307                 u8 old_retry_short, old_retry_long;
2308                 u32 old_frag_threshold, old_rts_threshold;
2309                 u8 old_coverage_class;
2310
2311                 if (!rdev->ops->set_wiphy_params)
2312                         return -EOPNOTSUPP;
2313
2314                 old_retry_short = rdev->wiphy.retry_short;
2315                 old_retry_long = rdev->wiphy.retry_long;
2316                 old_frag_threshold = rdev->wiphy.frag_threshold;
2317                 old_rts_threshold = rdev->wiphy.rts_threshold;
2318                 old_coverage_class = rdev->wiphy.coverage_class;
2319
2320                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2321                         rdev->wiphy.retry_short = retry_short;
2322                 if (changed & WIPHY_PARAM_RETRY_LONG)
2323                         rdev->wiphy.retry_long = retry_long;
2324                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2325                         rdev->wiphy.frag_threshold = frag_threshold;
2326                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2327                         rdev->wiphy.rts_threshold = rts_threshold;
2328                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2329                         rdev->wiphy.coverage_class = coverage_class;
2330
2331                 result = rdev_set_wiphy_params(rdev, changed);
2332                 if (result) {
2333                         rdev->wiphy.retry_short = old_retry_short;
2334                         rdev->wiphy.retry_long = old_retry_long;
2335                         rdev->wiphy.frag_threshold = old_frag_threshold;
2336                         rdev->wiphy.rts_threshold = old_rts_threshold;
2337                         rdev->wiphy.coverage_class = old_coverage_class;
2338                         return result;
2339                 }
2340         }
2341         return 0;
2342 }
2343
2344 static inline u64 wdev_id(struct wireless_dev *wdev)
2345 {
2346         return (u64)wdev->identifier |
2347                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2348 }
2349
2350 static int nl80211_send_chandef(struct sk_buff *msg,
2351                                 const struct cfg80211_chan_def *chandef)
2352 {
2353         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2354                 return -EINVAL;
2355
2356         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2357                         chandef->chan->center_freq))
2358                 return -ENOBUFS;
2359         switch (chandef->width) {
2360         case NL80211_CHAN_WIDTH_20_NOHT:
2361         case NL80211_CHAN_WIDTH_20:
2362         case NL80211_CHAN_WIDTH_40:
2363                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2364                                 cfg80211_get_chandef_type(chandef)))
2365                         return -ENOBUFS;
2366                 break;
2367         default:
2368                 break;
2369         }
2370         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2371                 return -ENOBUFS;
2372         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2373                 return -ENOBUFS;
2374         if (chandef->center_freq2 &&
2375             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2376                 return -ENOBUFS;
2377         return 0;
2378 }
2379
2380 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2381                               struct cfg80211_registered_device *rdev,
2382                               struct wireless_dev *wdev, bool removal)
2383 {
2384         struct net_device *dev = wdev->netdev;
2385         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2386         void *hdr;
2387
2388         if (removal)
2389                 cmd = NL80211_CMD_DEL_INTERFACE;
2390
2391         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2392         if (!hdr)
2393                 return -1;
2394
2395         if (dev &&
2396             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2397              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2398                 goto nla_put_failure;
2399
2400         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2401             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2402             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2403             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2404             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2405                         rdev->devlist_generation ^
2406                         (cfg80211_rdev_list_generation << 2)))
2407                 goto nla_put_failure;
2408
2409         if (rdev->ops->get_channel) {
2410                 int ret;
2411                 struct cfg80211_chan_def chandef;
2412
2413                 ret = rdev_get_channel(rdev, wdev, &chandef);
2414                 if (ret == 0) {
2415                         if (nl80211_send_chandef(msg, &chandef))
2416                                 goto nla_put_failure;
2417                 }
2418         }
2419
2420         if (rdev->ops->get_tx_power) {
2421                 int dbm, ret;
2422
2423                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2424                 if (ret == 0 &&
2425                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2426                                 DBM_TO_MBM(dbm)))
2427                         goto nla_put_failure;
2428         }
2429
2430         if (wdev->ssid_len) {
2431                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2432                         goto nla_put_failure;
2433         }
2434
2435         genlmsg_end(msg, hdr);
2436         return 0;
2437
2438  nla_put_failure:
2439         genlmsg_cancel(msg, hdr);
2440         return -EMSGSIZE;
2441 }
2442
2443 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2444 {
2445         int wp_idx = 0;
2446         int if_idx = 0;
2447         int wp_start = cb->args[0];
2448         int if_start = cb->args[1];
2449         struct cfg80211_registered_device *rdev;
2450         struct wireless_dev *wdev;
2451
2452         rtnl_lock();
2453         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2454                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2455                         continue;
2456                 if (wp_idx < wp_start) {
2457                         wp_idx++;
2458                         continue;
2459                 }
2460                 if_idx = 0;
2461
2462                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2463                         if (if_idx < if_start) {
2464                                 if_idx++;
2465                                 continue;
2466                         }
2467                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2468                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2469                                                rdev, wdev, false) < 0) {
2470                                 goto out;
2471                         }
2472                         if_idx++;
2473                 }
2474
2475                 wp_idx++;
2476         }
2477  out:
2478         rtnl_unlock();
2479
2480         cb->args[0] = wp_idx;
2481         cb->args[1] = if_idx;
2482
2483         return skb->len;
2484 }
2485
2486 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2487 {
2488         struct sk_buff *msg;
2489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2490         struct wireless_dev *wdev = info->user_ptr[1];
2491
2492         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2493         if (!msg)
2494                 return -ENOMEM;
2495
2496         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2497                                rdev, wdev, false) < 0) {
2498                 nlmsg_free(msg);
2499                 return -ENOBUFS;
2500         }
2501
2502         return genlmsg_reply(msg, info);
2503 }
2504
2505 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2506         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2507         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2508         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2509         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2510         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2511         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2512 };
2513
2514 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2515 {
2516         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2517         int flag;
2518
2519         *mntrflags = 0;
2520
2521         if (!nla)
2522                 return -EINVAL;
2523
2524         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2525                              nla, mntr_flags_policy))
2526                 return -EINVAL;
2527
2528         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2529                 if (flags[flag])
2530                         *mntrflags |= (1<<flag);
2531
2532         return 0;
2533 }
2534
2535 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2536                                struct net_device *netdev, u8 use_4addr,
2537                                enum nl80211_iftype iftype)
2538 {
2539         if (!use_4addr) {
2540                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2541                         return -EBUSY;
2542                 return 0;
2543         }
2544
2545         switch (iftype) {
2546         case NL80211_IFTYPE_AP_VLAN:
2547                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2548                         return 0;
2549                 break;
2550         case NL80211_IFTYPE_STATION:
2551                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2552                         return 0;
2553                 break;
2554         default:
2555                 break;
2556         }
2557
2558         return -EOPNOTSUPP;
2559 }
2560
2561 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2562 {
2563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2564         struct vif_params params;
2565         int err;
2566         enum nl80211_iftype otype, ntype;
2567         struct net_device *dev = info->user_ptr[1];
2568         u32 _flags, *flags = NULL;
2569         bool change = false;
2570
2571         memset(&params, 0, sizeof(params));
2572
2573         otype = ntype = dev->ieee80211_ptr->iftype;
2574
2575         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2576                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2577                 if (otype != ntype)
2578                         change = true;
2579                 if (ntype > NL80211_IFTYPE_MAX)
2580                         return -EINVAL;
2581         }
2582
2583         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2584                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2585
2586                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2587                         return -EINVAL;
2588                 if (netif_running(dev))
2589                         return -EBUSY;
2590
2591                 wdev_lock(wdev);
2592                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2593                              IEEE80211_MAX_MESH_ID_LEN);
2594                 wdev->mesh_id_up_len =
2595                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2596                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2597                        wdev->mesh_id_up_len);
2598                 wdev_unlock(wdev);
2599         }
2600
2601         if (info->attrs[NL80211_ATTR_4ADDR]) {
2602                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2603                 change = true;
2604                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2605                 if (err)
2606                         return err;
2607         } else {
2608                 params.use_4addr = -1;
2609         }
2610
2611         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2612                 if (ntype != NL80211_IFTYPE_MONITOR)
2613                         return -EINVAL;
2614                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2615                                           &_flags);
2616                 if (err)
2617                         return err;
2618
2619                 flags = &_flags;
2620                 change = true;
2621         }
2622
2623         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2624             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2625                 return -EOPNOTSUPP;
2626
2627         if (change)
2628                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2629         else
2630                 err = 0;
2631
2632         if (!err && params.use_4addr != -1)
2633                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2634
2635         return err;
2636 }
2637
2638 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2639 {
2640         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2641         struct vif_params params;
2642         struct wireless_dev *wdev;
2643         struct sk_buff *msg, *event;
2644         int err;
2645         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2646         u32 flags;
2647
2648         /* to avoid failing a new interface creation due to pending removal */
2649         cfg80211_destroy_ifaces(rdev);
2650
2651         memset(&params, 0, sizeof(params));
2652
2653         if (!info->attrs[NL80211_ATTR_IFNAME])
2654                 return -EINVAL;
2655
2656         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2657                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2658                 if (type > NL80211_IFTYPE_MAX)
2659                         return -EINVAL;
2660         }
2661
2662         if (!rdev->ops->add_virtual_intf ||
2663             !(rdev->wiphy.interface_modes & (1 << type)))
2664                 return -EOPNOTSUPP;
2665
2666         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2667              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2668             info->attrs[NL80211_ATTR_MAC]) {
2669                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2670                            ETH_ALEN);
2671                 if (!is_valid_ether_addr(params.macaddr))
2672                         return -EADDRNOTAVAIL;
2673         }
2674
2675         if (info->attrs[NL80211_ATTR_4ADDR]) {
2676                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2677                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2678                 if (err)
2679                         return err;
2680         }
2681
2682         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2683                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2684                                   &flags);
2685
2686         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2687             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2688                 return -EOPNOTSUPP;
2689
2690         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2691         if (!msg)
2692                 return -ENOMEM;
2693
2694         wdev = rdev_add_virtual_intf(rdev,
2695                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2696                                 NET_NAME_USER, type, err ? NULL : &flags,
2697                                 &params);
2698         if (WARN_ON(!wdev)) {
2699                 nlmsg_free(msg);
2700                 return -EPROTO;
2701         } else if (IS_ERR(wdev)) {
2702                 nlmsg_free(msg);
2703                 return PTR_ERR(wdev);
2704         }
2705
2706         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2707                 wdev->owner_nlportid = info->snd_portid;
2708
2709         switch (type) {
2710         case NL80211_IFTYPE_MESH_POINT:
2711                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2712                         break;
2713                 wdev_lock(wdev);
2714                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2715                              IEEE80211_MAX_MESH_ID_LEN);
2716                 wdev->mesh_id_up_len =
2717                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2718                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2719                        wdev->mesh_id_up_len);
2720                 wdev_unlock(wdev);
2721                 break;
2722         case NL80211_IFTYPE_P2P_DEVICE:
2723                 /*
2724                  * P2P Device doesn't have a netdev, so doesn't go
2725                  * through the netdev notifier and must be added here
2726                  */
2727                 mutex_init(&wdev->mtx);
2728                 INIT_LIST_HEAD(&wdev->event_list);
2729                 spin_lock_init(&wdev->event_lock);
2730                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2731                 spin_lock_init(&wdev->mgmt_registrations_lock);
2732
2733                 wdev->identifier = ++rdev->wdev_id;
2734                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2735                 rdev->devlist_generation++;
2736                 break;
2737         default:
2738                 break;
2739         }
2740
2741         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2742                                rdev, wdev, false) < 0) {
2743                 nlmsg_free(msg);
2744                 return -ENOBUFS;
2745         }
2746
2747         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2748         if (event) {
2749                 if (nl80211_send_iface(event, 0, 0, 0,
2750                                        rdev, wdev, false) < 0) {
2751                         nlmsg_free(event);
2752                         goto out;
2753                 }
2754
2755                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2756                                         event, 0, NL80211_MCGRP_CONFIG,
2757                                         GFP_KERNEL);
2758         }
2759
2760 out:
2761         return genlmsg_reply(msg, info);
2762 }
2763
2764 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2765 {
2766         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2767         struct wireless_dev *wdev = info->user_ptr[1];
2768         struct sk_buff *msg;
2769         int status;
2770
2771         if (!rdev->ops->del_virtual_intf)
2772                 return -EOPNOTSUPP;
2773
2774         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2775         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2776                 nlmsg_free(msg);
2777                 msg = NULL;
2778         }
2779
2780         /*
2781          * If we remove a wireless device without a netdev then clear
2782          * user_ptr[1] so that nl80211_post_doit won't dereference it
2783          * to check if it needs to do dev_put(). Otherwise it crashes
2784          * since the wdev has been freed, unlike with a netdev where
2785          * we need the dev_put() for the netdev to really be freed.
2786          */
2787         if (!wdev->netdev)
2788                 info->user_ptr[1] = NULL;
2789
2790         status = rdev_del_virtual_intf(rdev, wdev);
2791         if (status >= 0 && msg)
2792                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2793                                         msg, 0, NL80211_MCGRP_CONFIG,
2794                                         GFP_KERNEL);
2795         else
2796                 nlmsg_free(msg);
2797
2798         return status;
2799 }
2800
2801 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2802 {
2803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2804         struct net_device *dev = info->user_ptr[1];
2805         u16 noack_map;
2806
2807         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2808                 return -EINVAL;
2809
2810         if (!rdev->ops->set_noack_map)
2811                 return -EOPNOTSUPP;
2812
2813         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2814
2815         return rdev_set_noack_map(rdev, dev, noack_map);
2816 }
2817
2818 struct get_key_cookie {
2819         struct sk_buff *msg;
2820         int error;
2821         int idx;
2822 };
2823
2824 static void get_key_callback(void *c, struct key_params *params)
2825 {
2826         struct nlattr *key;
2827         struct get_key_cookie *cookie = c;
2828
2829         if ((params->key &&
2830              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2831                      params->key_len, params->key)) ||
2832             (params->seq &&
2833              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2834                      params->seq_len, params->seq)) ||
2835             (params->cipher &&
2836              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2837                          params->cipher)))
2838                 goto nla_put_failure;
2839
2840         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2841         if (!key)
2842                 goto nla_put_failure;
2843
2844         if ((params->key &&
2845              nla_put(cookie->msg, NL80211_KEY_DATA,
2846                      params->key_len, params->key)) ||
2847             (params->seq &&
2848              nla_put(cookie->msg, NL80211_KEY_SEQ,
2849                      params->seq_len, params->seq)) ||
2850             (params->cipher &&
2851              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2852                          params->cipher)))
2853                 goto nla_put_failure;
2854
2855         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2856                 goto nla_put_failure;
2857
2858         nla_nest_end(cookie->msg, key);
2859
2860         return;
2861  nla_put_failure:
2862         cookie->error = 1;
2863 }
2864
2865 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2866 {
2867         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2868         int err;
2869         struct net_device *dev = info->user_ptr[1];
2870         u8 key_idx = 0;
2871         const u8 *mac_addr = NULL;
2872         bool pairwise;
2873         struct get_key_cookie cookie = {
2874                 .error = 0,
2875         };
2876         void *hdr;
2877         struct sk_buff *msg;
2878
2879         if (info->attrs[NL80211_ATTR_KEY_IDX])
2880                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2881
2882         if (key_idx > 5)
2883                 return -EINVAL;
2884
2885         if (info->attrs[NL80211_ATTR_MAC])
2886                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2887
2888         pairwise = !!mac_addr;
2889         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2890                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2891                 if (kt >= NUM_NL80211_KEYTYPES)
2892                         return -EINVAL;
2893                 if (kt != NL80211_KEYTYPE_GROUP &&
2894                     kt != NL80211_KEYTYPE_PAIRWISE)
2895                         return -EINVAL;
2896                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2897         }
2898
2899         if (!rdev->ops->get_key)
2900                 return -EOPNOTSUPP;
2901
2902         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2903                 return -ENOENT;
2904
2905         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2906         if (!msg)
2907                 return -ENOMEM;
2908
2909         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2910                              NL80211_CMD_NEW_KEY);
2911         if (!hdr)
2912                 goto nla_put_failure;
2913
2914         cookie.msg = msg;
2915         cookie.idx = key_idx;
2916
2917         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2918             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2919                 goto nla_put_failure;
2920         if (mac_addr &&
2921             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2922                 goto nla_put_failure;
2923
2924         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2925                            get_key_callback);
2926
2927         if (err)
2928                 goto free_msg;
2929
2930         if (cookie.error)
2931                 goto nla_put_failure;
2932
2933         genlmsg_end(msg, hdr);
2934         return genlmsg_reply(msg, info);
2935
2936  nla_put_failure:
2937         err = -ENOBUFS;
2938  free_msg:
2939         nlmsg_free(msg);
2940         return err;
2941 }
2942
2943 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2944 {
2945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2946         struct key_parse key;
2947         int err;
2948         struct net_device *dev = info->user_ptr[1];
2949
2950         err = nl80211_parse_key(info, &key);
2951         if (err)
2952                 return err;
2953
2954         if (key.idx < 0)
2955                 return -EINVAL;
2956
2957         /* only support setting default key */
2958         if (!key.def && !key.defmgmt)
2959                 return -EINVAL;
2960
2961         wdev_lock(dev->ieee80211_ptr);
2962
2963         if (key.def) {
2964                 if (!rdev->ops->set_default_key) {
2965                         err = -EOPNOTSUPP;
2966                         goto out;
2967                 }
2968
2969                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2970                 if (err)
2971                         goto out;
2972
2973                 err = rdev_set_default_key(rdev, dev, key.idx,
2974                                                  key.def_uni, key.def_multi);
2975
2976                 if (err)
2977                         goto out;
2978
2979 #ifdef CONFIG_CFG80211_WEXT
2980                 dev->ieee80211_ptr->wext.default_key = key.idx;
2981 #endif
2982         } else {
2983                 if (key.def_uni || !key.def_multi) {
2984                         err = -EINVAL;
2985                         goto out;
2986                 }
2987
2988                 if (!rdev->ops->set_default_mgmt_key) {
2989                         err = -EOPNOTSUPP;
2990                         goto out;
2991                 }
2992
2993                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2994                 if (err)
2995                         goto out;
2996
2997                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2998                 if (err)
2999                         goto out;
3000
3001 #ifdef CONFIG_CFG80211_WEXT
3002                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3003 #endif
3004         }
3005
3006  out:
3007         wdev_unlock(dev->ieee80211_ptr);
3008
3009         return err;
3010 }
3011
3012 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3013 {
3014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3015         int err;
3016         struct net_device *dev = info->user_ptr[1];
3017         struct key_parse key;
3018         const u8 *mac_addr = NULL;
3019
3020         err = nl80211_parse_key(info, &key);
3021         if (err)
3022                 return err;
3023
3024         if (!key.p.key)
3025                 return -EINVAL;
3026
3027         if (info->attrs[NL80211_ATTR_MAC])
3028                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3029
3030         if (key.type == -1) {
3031                 if (mac_addr)
3032                         key.type = NL80211_KEYTYPE_PAIRWISE;
3033                 else
3034                         key.type = NL80211_KEYTYPE_GROUP;
3035         }
3036
3037         /* for now */
3038         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3039             key.type != NL80211_KEYTYPE_GROUP)
3040                 return -EINVAL;
3041
3042         if (!rdev->ops->add_key)
3043                 return -EOPNOTSUPP;
3044
3045         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3046                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3047                                            mac_addr))
3048                 return -EINVAL;
3049
3050         wdev_lock(dev->ieee80211_ptr);
3051         err = nl80211_key_allowed(dev->ieee80211_ptr);
3052         if (!err)
3053                 err = rdev_add_key(rdev, dev, key.idx,
3054                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3055                                     mac_addr, &key.p);
3056         wdev_unlock(dev->ieee80211_ptr);
3057
3058         return err;
3059 }
3060
3061 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3062 {
3063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3064         int err;
3065         struct net_device *dev = info->user_ptr[1];
3066         u8 *mac_addr = NULL;
3067         struct key_parse key;
3068
3069         err = nl80211_parse_key(info, &key);
3070         if (err)
3071                 return err;
3072
3073         if (info->attrs[NL80211_ATTR_MAC])
3074                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3075
3076         if (key.type == -1) {
3077                 if (mac_addr)
3078                         key.type = NL80211_KEYTYPE_PAIRWISE;
3079                 else
3080                         key.type = NL80211_KEYTYPE_GROUP;
3081         }
3082
3083         /* for now */
3084         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3085             key.type != NL80211_KEYTYPE_GROUP)
3086                 return -EINVAL;
3087
3088         if (!rdev->ops->del_key)
3089                 return -EOPNOTSUPP;
3090
3091         wdev_lock(dev->ieee80211_ptr);
3092         err = nl80211_key_allowed(dev->ieee80211_ptr);
3093
3094         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3095             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3096                 err = -ENOENT;
3097
3098         if (!err)
3099                 err = rdev_del_key(rdev, dev, key.idx,
3100                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3101                                    mac_addr);
3102
3103 #ifdef CONFIG_CFG80211_WEXT
3104         if (!err) {
3105                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3106                         dev->ieee80211_ptr->wext.default_key = -1;
3107                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3108                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3109         }
3110 #endif
3111         wdev_unlock(dev->ieee80211_ptr);
3112
3113         return err;
3114 }
3115
3116 /* This function returns an error or the number of nested attributes */
3117 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3118 {
3119         struct nlattr *attr;
3120         int n_entries = 0, tmp;
3121
3122         nla_for_each_nested(attr, nl_attr, tmp) {
3123                 if (nla_len(attr) != ETH_ALEN)
3124                         return -EINVAL;
3125
3126                 n_entries++;
3127         }
3128
3129         return n_entries;
3130 }
3131
3132 /*
3133  * This function parses ACL information and allocates memory for ACL data.
3134  * On successful return, the calling function is responsible to free the
3135  * ACL buffer returned by this function.
3136  */
3137 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3138                                                 struct genl_info *info)
3139 {
3140         enum nl80211_acl_policy acl_policy;
3141         struct nlattr *attr;
3142         struct cfg80211_acl_data *acl;
3143         int i = 0, n_entries, tmp;
3144
3145         if (!wiphy->max_acl_mac_addrs)
3146                 return ERR_PTR(-EOPNOTSUPP);
3147
3148         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3149                 return ERR_PTR(-EINVAL);
3150
3151         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3152         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3153             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3154                 return ERR_PTR(-EINVAL);
3155
3156         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3157                 return ERR_PTR(-EINVAL);
3158
3159         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3160         if (n_entries < 0)
3161                 return ERR_PTR(n_entries);
3162
3163         if (n_entries > wiphy->max_acl_mac_addrs)
3164                 return ERR_PTR(-ENOTSUPP);
3165
3166         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3167                       GFP_KERNEL);
3168         if (!acl)
3169                 return ERR_PTR(-ENOMEM);
3170
3171         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3172                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3173                 i++;
3174         }
3175
3176         acl->n_acl_entries = n_entries;
3177         acl->acl_policy = acl_policy;
3178
3179         return acl;
3180 }
3181
3182 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3183 {
3184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3185         struct net_device *dev = info->user_ptr[1];
3186         struct cfg80211_acl_data *acl;
3187         int err;
3188
3189         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3190             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3191                 return -EOPNOTSUPP;
3192
3193         if (!dev->ieee80211_ptr->beacon_interval)
3194                 return -EINVAL;
3195
3196         acl = parse_acl_data(&rdev->wiphy, info);
3197         if (IS_ERR(acl))
3198                 return PTR_ERR(acl);
3199
3200         err = rdev_set_mac_acl(rdev, dev, acl);
3201
3202         kfree(acl);
3203
3204         return err;
3205 }
3206
3207 static int nl80211_parse_beacon(struct nlattr *attrs[],
3208                                 struct cfg80211_beacon_data *bcn)
3209 {
3210         bool haveinfo = false;
3211
3212         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3213             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3214             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3215             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3216                 return -EINVAL;
3217
3218         memset(bcn, 0, sizeof(*bcn));
3219
3220         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3221                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3222                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3223                 if (!bcn->head_len)
3224                         return -EINVAL;
3225                 haveinfo = true;
3226         }
3227
3228         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3229                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3230                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3231                 haveinfo = true;
3232         }
3233
3234         if (!haveinfo)
3235                 return -EINVAL;
3236
3237         if (attrs[NL80211_ATTR_IE]) {
3238                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3239                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3240         }
3241
3242         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3243                 bcn->proberesp_ies =
3244                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3245                 bcn->proberesp_ies_len =
3246                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3247         }
3248
3249         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3250                 bcn->assocresp_ies =
3251                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3252                 bcn->assocresp_ies_len =
3253                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3254         }
3255
3256         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3257                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3258                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3259         }
3260
3261         return 0;
3262 }
3263
3264 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3265                                    struct cfg80211_ap_settings *params)
3266 {
3267         struct wireless_dev *wdev;
3268         bool ret = false;
3269
3270         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3271                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3272                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3273                         continue;
3274
3275                 if (!wdev->preset_chandef.chan)
3276                         continue;
3277
3278                 params->chandef = wdev->preset_chandef;
3279                 ret = true;
3280                 break;
3281         }
3282
3283         return ret;
3284 }
3285
3286 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3287                                     enum nl80211_auth_type auth_type,
3288                                     enum nl80211_commands cmd)
3289 {
3290         if (auth_type > NL80211_AUTHTYPE_MAX)
3291                 return false;
3292
3293         switch (cmd) {
3294         case NL80211_CMD_AUTHENTICATE:
3295                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3296                     auth_type == NL80211_AUTHTYPE_SAE)
3297                         return false;
3298                 return true;
3299         case NL80211_CMD_CONNECT:
3300         case NL80211_CMD_START_AP:
3301                 /* SAE not supported yet */
3302                 if (auth_type == NL80211_AUTHTYPE_SAE)
3303                         return false;
3304                 return true;
3305         default:
3306                 return false;
3307         }
3308 }
3309
3310 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3311 {
3312         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3313         struct net_device *dev = info->user_ptr[1];
3314         struct wireless_dev *wdev = dev->ieee80211_ptr;
3315         struct cfg80211_ap_settings params;
3316         int err;
3317
3318         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3319             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3320                 return -EOPNOTSUPP;
3321
3322         if (!rdev->ops->start_ap)
3323                 return -EOPNOTSUPP;
3324
3325         if (wdev->beacon_interval)
3326                 return -EALREADY;
3327
3328         memset(&params, 0, sizeof(params));
3329
3330         /* these are required for START_AP */
3331         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3332             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3333             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3334                 return -EINVAL;
3335
3336         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3337         if (err)
3338                 return err;
3339
3340         params.beacon_interval =
3341                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3342         params.dtim_period =
3343                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3344
3345         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3346         if (err)
3347                 return err;
3348
3349         /*
3350          * In theory, some of these attributes should be required here
3351          * but since they were not used when the command was originally
3352          * added, keep them optional for old user space programs to let
3353          * them continue to work with drivers that do not need the
3354          * additional information -- drivers must check!
3355          */
3356         if (info->attrs[NL80211_ATTR_SSID]) {
3357                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3358                 params.ssid_len =
3359                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3360                 if (params.ssid_len == 0 ||
3361                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3362                         return -EINVAL;
3363         }
3364
3365         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3366                 params.hidden_ssid = nla_get_u32(
3367                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3368                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3369                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3370                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3371                         return -EINVAL;
3372         }
3373
3374         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3375
3376         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3377                 params.auth_type = nla_get_u32(
3378                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3379                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3380                                              NL80211_CMD_START_AP))
3381                         return -EINVAL;
3382         } else
3383                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3384
3385         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3386                                       NL80211_MAX_NR_CIPHER_SUITES);
3387         if (err)
3388                 return err;
3389
3390         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3391                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3392                         return -EOPNOTSUPP;
3393                 params.inactivity_timeout = nla_get_u16(
3394                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3395         }
3396
3397         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3398                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3399                         return -EINVAL;
3400                 params.p2p_ctwindow =
3401                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3402                 if (params.p2p_ctwindow > 127)
3403                         return -EINVAL;
3404                 if (params.p2p_ctwindow != 0 &&
3405                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3406                         return -EINVAL;
3407         }
3408
3409         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3410                 u8 tmp;
3411
3412                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3413                         return -EINVAL;
3414                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3415                 if (tmp > 1)
3416                         return -EINVAL;
3417                 params.p2p_opp_ps = tmp;
3418                 if (params.p2p_opp_ps != 0 &&
3419                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3420                         return -EINVAL;
3421         }
3422
3423         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3424                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3425                 if (err)
3426                         return err;
3427         } else if (wdev->preset_chandef.chan) {
3428                 params.chandef = wdev->preset_chandef;
3429         } else if (!nl80211_get_ap_channel(rdev, &params))
3430                 return -EINVAL;
3431
3432         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3433                                            wdev->iftype))
3434                 return -EINVAL;
3435
3436         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3437                 params.smps_mode =
3438                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3439                 switch (params.smps_mode) {
3440                 case NL80211_SMPS_OFF:
3441                         break;
3442                 case NL80211_SMPS_STATIC:
3443                         if (!(rdev->wiphy.features &
3444                               NL80211_FEATURE_STATIC_SMPS))
3445                                 return -EINVAL;
3446                         break;
3447                 case NL80211_SMPS_DYNAMIC:
3448                         if (!(rdev->wiphy.features &
3449                               NL80211_FEATURE_DYNAMIC_SMPS))
3450                                 return -EINVAL;
3451                         break;
3452                 default:
3453                         return -EINVAL;
3454                 }
3455         } else {
3456                 params.smps_mode = NL80211_SMPS_OFF;
3457         }
3458
3459         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3460                 params.acl = parse_acl_data(&rdev->wiphy, info);
3461                 if (IS_ERR(params.acl))
3462                         return PTR_ERR(params.acl);
3463         }
3464
3465         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3466         if (params.pbss && !rdev->wiphy.bands[IEEE80211_BAND_60GHZ])
3467                 return -EOPNOTSUPP;
3468
3469         wdev_lock(wdev);
3470         err = rdev_start_ap(rdev, dev, &params);
3471         if (!err) {
3472                 wdev->preset_chandef = params.chandef;
3473                 wdev->beacon_interval = params.beacon_interval;
3474                 wdev->chandef = params.chandef;
3475                 wdev->ssid_len = params.ssid_len;
3476                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3477         }
3478         wdev_unlock(wdev);
3479
3480         kfree(params.acl);
3481
3482         return err;
3483 }
3484
3485 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3486 {
3487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3488         struct net_device *dev = info->user_ptr[1];
3489         struct wireless_dev *wdev = dev->ieee80211_ptr;
3490         struct cfg80211_beacon_data params;
3491         int err;
3492
3493         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3494             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3495                 return -EOPNOTSUPP;
3496
3497         if (!rdev->ops->change_beacon)
3498                 return -EOPNOTSUPP;
3499
3500         if (!wdev->beacon_interval)
3501                 return -EINVAL;
3502
3503         err = nl80211_parse_beacon(info->attrs, &params);
3504         if (err)
3505                 return err;
3506
3507         wdev_lock(wdev);
3508         err = rdev_change_beacon(rdev, dev, &params);
3509         wdev_unlock(wdev);
3510
3511         return err;
3512 }
3513
3514 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3515 {
3516         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3517         struct net_device *dev = info->user_ptr[1];
3518
3519         return cfg80211_stop_ap(rdev, dev, false);
3520 }
3521
3522 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3523         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3524         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3525         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3526         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3527         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3528         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3529 };
3530
3531 static int parse_station_flags(struct genl_info *info,
3532                                enum nl80211_iftype iftype,
3533                                struct station_parameters *params)
3534 {
3535         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3536         struct nlattr *nla;
3537         int flag;
3538
3539         /*
3540          * Try parsing the new attribute first so userspace
3541          * can specify both for older kernels.
3542          */
3543         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3544         if (nla) {
3545                 struct nl80211_sta_flag_update *sta_flags;
3546
3547                 sta_flags = nla_data(nla);
3548                 params->sta_flags_mask = sta_flags->mask;
3549                 params->sta_flags_set = sta_flags->set;
3550                 params->sta_flags_set &= params->sta_flags_mask;
3551                 if ((params->sta_flags_mask |
3552                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3553                         return -EINVAL;
3554                 return 0;
3555         }
3556
3557         /* if present, parse the old attribute */
3558
3559         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3560         if (!nla)
3561                 return 0;
3562
3563         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3564                              nla, sta_flags_policy))
3565                 return -EINVAL;
3566
3567         /*
3568          * Only allow certain flags for interface types so that
3569          * other attributes are silently ignored. Remember that
3570          * this is backward compatibility code with old userspace
3571          * and shouldn't be hit in other cases anyway.
3572          */
3573         switch (iftype) {
3574         case NL80211_IFTYPE_AP:
3575         case NL80211_IFTYPE_AP_VLAN:
3576         case NL80211_IFTYPE_P2P_GO:
3577                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3578                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3579                                          BIT(NL80211_STA_FLAG_WME) |
3580                                          BIT(NL80211_STA_FLAG_MFP);
3581                 break;
3582         case NL80211_IFTYPE_P2P_CLIENT:
3583         case NL80211_IFTYPE_STATION:
3584                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3585                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3586                 break;
3587         case NL80211_IFTYPE_MESH_POINT:
3588                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3589                                          BIT(NL80211_STA_FLAG_MFP) |
3590                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3591         default:
3592                 return -EINVAL;
3593         }
3594
3595         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3596                 if (flags[flag]) {
3597                         params->sta_flags_set |= (1<<flag);
3598
3599                         /* no longer support new API additions in old API */
3600                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3601                                 return -EINVAL;
3602                 }
3603         }
3604
3605         return 0;
3606 }
3607
3608 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3609                                  int attr)
3610 {
3611         struct nlattr *rate;
3612         u32 bitrate;
3613         u16 bitrate_compat;
3614         enum nl80211_attrs rate_flg;
3615
3616         rate = nla_nest_start(msg, attr);
3617         if (!rate)
3618                 return false;
3619
3620         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3621         bitrate = cfg80211_calculate_bitrate(info);
3622         /* report 16-bit bitrate only if we can */
3623         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3624         if (bitrate > 0 &&
3625             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3626                 return false;
3627         if (bitrate_compat > 0 &&
3628             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3629                 return false;
3630
3631         switch (info->bw) {
3632         case RATE_INFO_BW_5:
3633                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3634                 break;
3635         case RATE_INFO_BW_10:
3636                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3637                 break;
3638         default:
3639                 WARN_ON(1);
3640                 /* fall through */
3641         case RATE_INFO_BW_20:
3642                 rate_flg = 0;
3643                 break;
3644         case RATE_INFO_BW_40:
3645                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3646                 break;
3647         case RATE_INFO_BW_80:
3648                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3649                 break;
3650         case RATE_INFO_BW_160:
3651                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3652                 break;
3653         }
3654
3655         if (rate_flg && nla_put_flag(msg, rate_flg))
3656                 return false;
3657
3658         if (info->flags & RATE_INFO_FLAGS_MCS) {
3659                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3660                         return false;
3661                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3662                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3663                         return false;
3664         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3665                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3666                         return false;
3667                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3668                         return false;
3669                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3670                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3671                         return false;
3672         }
3673
3674         nla_nest_end(msg, rate);
3675         return true;
3676 }
3677
3678 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3679                                int id)
3680 {
3681         void *attr;
3682         int i = 0;
3683
3684         if (!mask)
3685                 return true;
3686
3687         attr = nla_nest_start(msg, id);
3688         if (!attr)
3689                 return false;
3690
3691         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3692                 if (!(mask & BIT(i)))
3693                         continue;
3694
3695                 if (nla_put_u8(msg, i, signal[i]))
3696                         return false;
3697         }
3698
3699         nla_nest_end(msg, attr);
3700
3701         return true;
3702 }
3703
3704 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3705                                 u32 seq, int flags,
3706                                 struct cfg80211_registered_device *rdev,
3707                                 struct net_device *dev,
3708                                 const u8 *mac_addr, struct station_info *sinfo)
3709 {
3710         void *hdr;
3711         struct nlattr *sinfoattr, *bss_param;
3712
3713         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3714         if (!hdr)
3715                 return -1;
3716
3717         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3718             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3719             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3720                 goto nla_put_failure;
3721
3722         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3723         if (!sinfoattr)
3724                 goto nla_put_failure;
3725
3726 #define PUT_SINFO(attr, memb, type) do {                                \
3727         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3728             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3729                              sinfo->memb))                              \
3730                 goto nla_put_failure;                                   \
3731         } while (0)
3732
3733         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3734         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3735
3736         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3737                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3738             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3739                         (u32)sinfo->rx_bytes))
3740                 goto nla_put_failure;
3741
3742         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3743                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3744             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3745                         (u32)sinfo->tx_bytes))
3746                 goto nla_put_failure;
3747
3748         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3749         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3750         PUT_SINFO(LLID, llid, u16);
3751         PUT_SINFO(PLID, plid, u16);
3752         PUT_SINFO(PLINK_STATE, plink_state, u8);
3753
3754         switch (rdev->wiphy.signal_type) {
3755         case CFG80211_SIGNAL_TYPE_MBM:
3756                 PUT_SINFO(SIGNAL, signal, u8);
3757                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3758                 break;
3759         default:
3760                 break;
3761         }
3762         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3763                 if (!nl80211_put_signal(msg, sinfo->chains,
3764                                         sinfo->chain_signal,
3765                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3766                         goto nla_put_failure;
3767         }
3768         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3769                 if (!nl80211_put_signal(msg, sinfo->chains,
3770                                         sinfo->chain_signal_avg,
3771                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3772                         goto nla_put_failure;
3773         }
3774         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3775                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3776                                           NL80211_STA_INFO_TX_BITRATE))
3777                         goto nla_put_failure;
3778         }
3779         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3780                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3781                                           NL80211_STA_INFO_RX_BITRATE))
3782                         goto nla_put_failure;
3783         }
3784
3785         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3786         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3787         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3788         PUT_SINFO(TX_FAILED, tx_failed, u32);
3789         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3790         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3791         PUT_SINFO(LOCAL_PM, local_pm, u32);
3792         PUT_SINFO(PEER_PM, peer_pm, u32);
3793         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3794
3795         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3796                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3797                 if (!bss_param)
3798                         goto nla_put_failure;
3799
3800                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3801                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3802                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3803                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3804                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3805                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3806                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3807                                sinfo->bss_param.dtim_period) ||
3808                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3809                                 sinfo->bss_param.beacon_interval))
3810                         goto nla_put_failure;
3811
3812                 nla_nest_end(msg, bss_param);
3813         }
3814         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3815             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3816                     sizeof(struct nl80211_sta_flag_update),
3817                     &sinfo->sta_flags))
3818                 goto nla_put_failure;
3819
3820         PUT_SINFO(T_OFFSET, t_offset, u64);
3821         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3822         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3823         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3824
3825 #undef PUT_SINFO
3826
3827         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3828                 struct nlattr *tidsattr;
3829                 int tid;
3830
3831                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3832                 if (!tidsattr)
3833                         goto nla_put_failure;
3834
3835                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3836                         struct cfg80211_tid_stats *tidstats;
3837                         struct nlattr *tidattr;
3838
3839                         tidstats = &sinfo->pertid[tid];
3840
3841                         if (!tidstats->filled)
3842                                 continue;
3843
3844                         tidattr = nla_nest_start(msg, tid + 1);
3845                         if (!tidattr)
3846                                 goto nla_put_failure;
3847
3848 #define PUT_TIDVAL(attr, memb, type) do {                               \
3849         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3850             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3851                              tidstats->memb))                           \
3852                 goto nla_put_failure;                                   \
3853         } while (0)
3854
3855                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3856                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3857                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3858                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3859
3860 #undef PUT_TIDVAL
3861                         nla_nest_end(msg, tidattr);
3862                 }
3863
3864                 nla_nest_end(msg, tidsattr);
3865         }
3866
3867         nla_nest_end(msg, sinfoattr);
3868
3869         if (sinfo->assoc_req_ies_len &&
3870             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3871                     sinfo->assoc_req_ies))
3872                 goto nla_put_failure;
3873
3874         genlmsg_end(msg, hdr);
3875         return 0;
3876
3877  nla_put_failure:
3878         genlmsg_cancel(msg, hdr);
3879         return -EMSGSIZE;
3880 }
3881
3882 static int nl80211_dump_station(struct sk_buff *skb,
3883                                 struct netlink_callback *cb)
3884 {
3885         struct station_info sinfo;
3886         struct cfg80211_registered_device *rdev;
3887         struct wireless_dev *wdev;
3888         u8 mac_addr[ETH_ALEN];
3889         int sta_idx = cb->args[2];
3890         int err;
3891
3892         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3893         if (err)
3894                 return err;
3895
3896         if (!wdev->netdev) {
3897                 err = -EINVAL;
3898                 goto out_err;
3899         }
3900
3901         if (!rdev->ops->dump_station) {
3902                 err = -EOPNOTSUPP;
3903                 goto out_err;
3904         }
3905
3906         while (1) {
3907                 memset(&sinfo, 0, sizeof(sinfo));
3908                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3909                                         mac_addr, &sinfo);
3910                 if (err == -ENOENT)
3911                         break;
3912                 if (err)
3913                         goto out_err;
3914
3915                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3916                                 NETLINK_CB(cb->skb).portid,
3917                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3918                                 rdev, wdev->netdev, mac_addr,
3919                                 &sinfo) < 0)
3920                         goto out;
3921
3922                 sta_idx++;
3923         }
3924
3925
3926  out:
3927         cb->args[2] = sta_idx;
3928         err = skb->len;
3929  out_err:
3930         nl80211_finish_wdev_dump(rdev);
3931
3932         return err;
3933 }
3934
3935 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3936 {
3937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3938         struct net_device *dev = info->user_ptr[1];
3939         struct station_info sinfo;
3940         struct sk_buff *msg;
3941         u8 *mac_addr = NULL;
3942         int err;
3943
3944         memset(&sinfo, 0, sizeof(sinfo));
3945
3946         if (!info->attrs[NL80211_ATTR_MAC])
3947                 return -EINVAL;
3948
3949         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3950
3951         if (!rdev->ops->get_station)
3952                 return -EOPNOTSUPP;
3953
3954         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3955         if (err)
3956                 return err;
3957
3958         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3959         if (!msg)
3960                 return -ENOMEM;
3961
3962         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3963                                  info->snd_portid, info->snd_seq, 0,
3964                                  rdev, dev, mac_addr, &sinfo) < 0) {
3965                 nlmsg_free(msg);
3966                 return -ENOBUFS;
3967         }
3968
3969         return genlmsg_reply(msg, info);
3970 }
3971
3972 int cfg80211_check_station_change(struct wiphy *wiphy,
3973                                   struct station_parameters *params,
3974                                   enum cfg80211_station_type statype)
3975 {
3976         if (params->listen_interval != -1 &&
3977             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3978                 return -EINVAL;
3979
3980         if (params->aid &&
3981             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
3982             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3983                 return -EINVAL;
3984
3985         /* When you run into this, adjust the code below for the new flag */
3986         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3987
3988         switch (statype) {
3989         case CFG80211_STA_MESH_PEER_KERNEL:
3990         case CFG80211_STA_MESH_PEER_USER:
3991                 /*
3992                  * No ignoring the TDLS flag here -- the userspace mesh
3993                  * code doesn't have the bug of including TDLS in the
3994                  * mask everywhere.
3995                  */
3996                 if (params->sta_flags_mask &
3997                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3998                                   BIT(NL80211_STA_FLAG_MFP) |
3999                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4000                         return -EINVAL;
4001                 break;
4002         case CFG80211_STA_TDLS_PEER_SETUP:
4003         case CFG80211_STA_TDLS_PEER_ACTIVE:
4004                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4005                         return -EINVAL;
4006                 /* ignore since it can't change */
4007                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4008                 break;
4009         default:
4010                 /* disallow mesh-specific things */
4011                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4012                         return -EINVAL;
4013                 if (params->local_pm)
4014                         return -EINVAL;
4015                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4016                         return -EINVAL;
4017         }
4018
4019         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4020             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4021                 /* TDLS can't be set, ... */
4022                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4023                         return -EINVAL;
4024                 /*
4025                  * ... but don't bother the driver with it. This works around
4026                  * a hostapd/wpa_supplicant issue -- it always includes the
4027                  * TLDS_PEER flag in the mask even for AP mode.
4028                  */
4029                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4030         }
4031
4032         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4033             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4034                 /* reject other things that can't change */
4035                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4036                         return -EINVAL;
4037                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4038                         return -EINVAL;
4039                 if (params->supported_rates)
4040                         return -EINVAL;
4041                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4042                         return -EINVAL;
4043         }
4044
4045         if (statype != CFG80211_STA_AP_CLIENT &&
4046             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4047                 if (params->vlan)
4048                         return -EINVAL;
4049         }
4050
4051         switch (statype) {
4052         case CFG80211_STA_AP_MLME_CLIENT:
4053                 /* Use this only for authorizing/unauthorizing a station */
4054                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4055                         return -EOPNOTSUPP;
4056                 break;
4057         case CFG80211_STA_AP_CLIENT:
4058         case CFG80211_STA_AP_CLIENT_UNASSOC:
4059                 /* accept only the listed bits */
4060                 if (params->sta_flags_mask &
4061                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4062                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4063                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4064                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4065                                   BIT(NL80211_STA_FLAG_WME) |
4066                                   BIT(NL80211_STA_FLAG_MFP)))
4067                         return -EINVAL;
4068
4069                 /* but authenticated/associated only if driver handles it */
4070                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4071                     params->sta_flags_mask &
4072                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4073                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4074                         return -EINVAL;
4075                 break;
4076         case CFG80211_STA_IBSS:
4077         case CFG80211_STA_AP_STA:
4078                 /* reject any changes other than AUTHORIZED */
4079                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4080                         return -EINVAL;
4081                 break;
4082         case CFG80211_STA_TDLS_PEER_SETUP:
4083                 /* reject any changes other than AUTHORIZED or WME */
4084                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4085                                                BIT(NL80211_STA_FLAG_WME)))
4086                         return -EINVAL;
4087                 /* force (at least) rates when authorizing */
4088                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4089                     !params->supported_rates)
4090                         return -EINVAL;
4091                 break;
4092         case CFG80211_STA_TDLS_PEER_ACTIVE:
4093                 /* reject any changes */
4094                 return -EINVAL;
4095         case CFG80211_STA_MESH_PEER_KERNEL:
4096                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4097                         return -EINVAL;
4098                 break;
4099         case CFG80211_STA_MESH_PEER_USER:
4100                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4101                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4102                         return -EINVAL;
4103                 break;
4104         }
4105
4106         return 0;
4107 }
4108 EXPORT_SYMBOL(cfg80211_check_station_change);
4109
4110 /*
4111  * Get vlan interface making sure it is running and on the right wiphy.
4112  */
4113 static struct net_device *get_vlan(struct genl_info *info,
4114                                    struct cfg80211_registered_device *rdev)
4115 {
4116         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4117         struct net_device *v;
4118         int ret;
4119
4120         if (!vlanattr)
4121                 return NULL;
4122
4123         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4124         if (!v)
4125                 return ERR_PTR(-ENODEV);
4126
4127         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4128                 ret = -EINVAL;
4129                 goto error;
4130         }
4131
4132         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4133             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4134             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4135                 ret = -EINVAL;
4136                 goto error;
4137         }
4138
4139         if (!netif_running(v)) {
4140                 ret = -ENETDOWN;
4141                 goto error;
4142         }
4143
4144         return v;
4145  error:
4146         dev_put(v);
4147         return ERR_PTR(ret);
4148 }
4149
4150 static const struct nla_policy
4151 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4152         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4153         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4154 };
4155
4156 static int nl80211_parse_sta_wme(struct genl_info *info,
4157                                  struct station_parameters *params)
4158 {
4159         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4160         struct nlattr *nla;
4161         int err;
4162
4163         /* parse WME attributes if present */
4164         if (!info->attrs[NL80211_ATTR_STA_WME])
4165                 return 0;
4166
4167         nla = info->attrs[NL80211_ATTR_STA_WME];
4168         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4169                                nl80211_sta_wme_policy);
4170         if (err)
4171                 return err;
4172
4173         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4174                 params->uapsd_queues = nla_get_u8(
4175                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4176         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4177                 return -EINVAL;
4178
4179         if (tb[NL80211_STA_WME_MAX_SP])
4180                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4181
4182         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4183                 return -EINVAL;
4184
4185         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4186
4187         return 0;
4188 }
4189
4190 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4191                                       struct station_parameters *params)
4192 {
4193         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4194                 params->supported_channels =
4195                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4196                 params->supported_channels_len =
4197                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4198                 /*
4199                  * Need to include at least one (first channel, number of
4200                  * channels) tuple for each subband, and must have proper
4201                  * tuples for the rest of the data as well.
4202                  */
4203                 if (params->supported_channels_len < 2)
4204                         return -EINVAL;
4205                 if (params->supported_channels_len % 2)
4206                         return -EINVAL;
4207         }
4208
4209         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4210                 params->supported_oper_classes =
4211                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4212                 params->supported_oper_classes_len =
4213                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4214                 /*
4215                  * The value of the Length field of the Supported Operating
4216                  * Classes element is between 2 and 253.
4217                  */
4218                 if (params->supported_oper_classes_len < 2 ||
4219                     params->supported_oper_classes_len > 253)
4220                         return -EINVAL;
4221         }
4222         return 0;
4223 }
4224
4225 static int nl80211_set_station_tdls(struct genl_info *info,
4226                                     struct station_parameters *params)
4227 {
4228         int err;
4229         /* Dummy STA entry gets updated once the peer capabilities are known */
4230         if (info->attrs[NL80211_ATTR_PEER_AID])
4231                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4232         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4233                 params->ht_capa =
4234                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4235         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4236                 params->vht_capa =
4237                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4238
4239         err = nl80211_parse_sta_channel_info(info, params);
4240         if (err)
4241                 return err;
4242
4243         return nl80211_parse_sta_wme(info, params);
4244 }
4245
4246 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4247 {
4248         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4249         struct net_device *dev = info->user_ptr[1];
4250         struct station_parameters params;
4251         u8 *mac_addr;
4252         int err;
4253
4254         memset(&params, 0, sizeof(params));
4255
4256         if (!rdev->ops->change_station)
4257                 return -EOPNOTSUPP;
4258
4259         /*
4260          * AID and listen_interval properties can be set only for unassociated
4261          * station. Include these parameters here and will check them in
4262          * cfg80211_check_station_change().
4263          */
4264         if (info->attrs[NL80211_ATTR_STA_AID])
4265                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4266
4267         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4268                 params.listen_interval =
4269                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4270         else
4271                 params.listen_interval = -1;
4272
4273         if (!info->attrs[NL80211_ATTR_MAC])
4274                 return -EINVAL;
4275
4276         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4277
4278         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4279                 params.supported_rates =
4280                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4281                 params.supported_rates_len =
4282                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4283         }
4284
4285         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4286                 params.capability =
4287                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4288                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4289         }
4290
4291         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4292                 params.ext_capab =
4293                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4294                 params.ext_capab_len =
4295                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4296         }
4297
4298         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4299                 return -EINVAL;
4300
4301         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4302                 params.plink_action =
4303                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4304                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4305                         return -EINVAL;
4306         }
4307
4308         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4309                 params.plink_state =
4310                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4311                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4312                         return -EINVAL;
4313                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4314         }
4315
4316         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4317                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4318                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4319
4320                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4321                     pm > NL80211_MESH_POWER_MAX)
4322                         return -EINVAL;
4323
4324                 params.local_pm = pm;
4325         }
4326
4327         /* Include parameters for TDLS peer (will check later) */
4328         err = nl80211_set_station_tdls(info, &params);
4329         if (err)
4330                 return err;
4331
4332         params.vlan = get_vlan(info, rdev);
4333         if (IS_ERR(params.vlan))
4334                 return PTR_ERR(params.vlan);
4335
4336         switch (dev->ieee80211_ptr->iftype) {
4337         case NL80211_IFTYPE_AP:
4338         case NL80211_IFTYPE_AP_VLAN:
4339         case NL80211_IFTYPE_P2P_GO:
4340         case NL80211_IFTYPE_P2P_CLIENT:
4341         case NL80211_IFTYPE_STATION:
4342         case NL80211_IFTYPE_ADHOC:
4343         case NL80211_IFTYPE_MESH_POINT:
4344                 break;
4345         default:
4346                 err = -EOPNOTSUPP;
4347                 goto out_put_vlan;
4348         }
4349
4350         /* driver will call cfg80211_check_station_change() */
4351         err = rdev_change_station(rdev, dev, mac_addr, &params);
4352
4353  out_put_vlan:
4354         if (params.vlan)
4355                 dev_put(params.vlan);
4356
4357         return err;
4358 }
4359
4360 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4361 {
4362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4363         int err;
4364         struct net_device *dev = info->user_ptr[1];
4365         struct station_parameters params;
4366         u8 *mac_addr = NULL;
4367         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4368                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4369
4370         memset(&params, 0, sizeof(params));
4371
4372         if (!rdev->ops->add_station)
4373                 return -EOPNOTSUPP;
4374
4375         if (!info->attrs[NL80211_ATTR_MAC])
4376                 return -EINVAL;
4377
4378         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4379                 return -EINVAL;
4380
4381         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4382                 return -EINVAL;
4383
4384         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4385             !info->attrs[NL80211_ATTR_PEER_AID])
4386                 return -EINVAL;
4387
4388         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4389         params.supported_rates =
4390                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4391         params.supported_rates_len =
4392                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4393         params.listen_interval =
4394                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4395
4396         if (info->attrs[NL80211_ATTR_PEER_AID])
4397                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4398         else
4399                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4400         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4401                 return -EINVAL;
4402
4403         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4404                 params.capability =
4405                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4406                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4407         }
4408
4409         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4410                 params.ext_capab =
4411                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4412                 params.ext_capab_len =
4413                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4414         }
4415
4416         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4417                 params.ht_capa =
4418                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4419
4420         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4421                 params.vht_capa =
4422                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4423
4424         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4425                 params.opmode_notif_used = true;
4426                 params.opmode_notif =
4427                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4428         }
4429
4430         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4431                 params.plink_action =
4432                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4433                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4434                         return -EINVAL;
4435         }
4436
4437         err = nl80211_parse_sta_channel_info(info, &params);
4438         if (err)
4439                 return err;
4440
4441         err = nl80211_parse_sta_wme(info, &params);
4442         if (err)
4443                 return err;
4444
4445         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4446                 return -EINVAL;
4447
4448         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4449          * as userspace might just pass through the capabilities from the IEs
4450          * directly, rather than enforcing this restriction and returning an
4451          * error in this case.
4452          */
4453         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4454                 params.ht_capa = NULL;
4455                 params.vht_capa = NULL;
4456         }
4457
4458         /* When you run into this, adjust the code below for the new flag */
4459         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4460
4461         switch (dev->ieee80211_ptr->iftype) {
4462         case NL80211_IFTYPE_AP:
4463         case NL80211_IFTYPE_AP_VLAN:
4464         case NL80211_IFTYPE_P2P_GO:
4465                 /* ignore WME attributes if iface/sta is not capable */
4466                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4467                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4468                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4469
4470                 /* TDLS peers cannot be added */
4471                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4472                     info->attrs[NL80211_ATTR_PEER_AID])
4473                         return -EINVAL;
4474                 /* but don't bother the driver with it */
4475                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4476
4477                 /* allow authenticated/associated only if driver handles it */
4478                 if (!(rdev->wiphy.features &
4479                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4480                     params.sta_flags_mask & auth_assoc)
4481                         return -EINVAL;
4482
4483                 /* Older userspace, or userspace wanting to be compatible with
4484                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4485                  * and assoc flags in the mask, but assumes the station will be
4486                  * added as associated anyway since this was the required driver
4487                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4488                  * introduced.
4489                  * In order to not bother drivers with this quirk in the API
4490                  * set the flags in both the mask and set for new stations in
4491                  * this case.
4492                  */
4493                 if (!(params.sta_flags_mask & auth_assoc)) {
4494                         params.sta_flags_mask |= auth_assoc;
4495                         params.sta_flags_set |= auth_assoc;
4496                 }
4497
4498                 /* must be last in here for error handling */
4499                 params.vlan = get_vlan(info, rdev);
4500                 if (IS_ERR(params.vlan))
4501                         return PTR_ERR(params.vlan);
4502                 break;
4503         case NL80211_IFTYPE_MESH_POINT:
4504                 /* ignore uAPSD data */
4505                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4506
4507                 /* associated is disallowed */
4508                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4509                         return -EINVAL;
4510                 /* TDLS peers cannot be added */
4511                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4512                     info->attrs[NL80211_ATTR_PEER_AID])
4513                         return -EINVAL;
4514                 break;
4515         case NL80211_IFTYPE_STATION:
4516         case NL80211_IFTYPE_P2P_CLIENT:
4517                 /* ignore uAPSD data */
4518                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4519
4520                 /* these are disallowed */
4521                 if (params.sta_flags_mask &
4522                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4523                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4524                         return -EINVAL;
4525                 /* Only TDLS peers can be added */
4526                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4527                         return -EINVAL;
4528                 /* Can only add if TDLS ... */
4529                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4530                         return -EOPNOTSUPP;
4531                 /* ... with external setup is supported */
4532                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4533                         return -EOPNOTSUPP;
4534                 /*
4535                  * Older wpa_supplicant versions always mark the TDLS peer
4536                  * as authorized, but it shouldn't yet be.
4537                  */
4538                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4539                 break;
4540         default:
4541                 return -EOPNOTSUPP;
4542         }
4543
4544         /* be aware of params.vlan when changing code here */
4545
4546         err = rdev_add_station(rdev, dev, mac_addr, &params);
4547
4548         if (params.vlan)
4549                 dev_put(params.vlan);
4550         return err;
4551 }
4552
4553 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4554 {
4555         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4556         struct net_device *dev = info->user_ptr[1];
4557         struct station_del_parameters params;
4558
4559         memset(&params, 0, sizeof(params));
4560
4561         if (info->attrs[NL80211_ATTR_MAC])
4562                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4563
4564         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4565             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4566             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4567             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4568                 return -EINVAL;
4569
4570         if (!rdev->ops->del_station)
4571                 return -EOPNOTSUPP;
4572
4573         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4574                 params.subtype =
4575                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4576                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4577                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4578                         return -EINVAL;
4579         } else {
4580                 /* Default to Deauthentication frame */
4581                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4582         }
4583
4584         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4585                 params.reason_code =
4586                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4587                 if (params.reason_code == 0)
4588                         return -EINVAL; /* 0 is reserved */
4589         } else {
4590                 /* Default to reason code 2 */
4591                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4592         }
4593
4594         return rdev_del_station(rdev, dev, &params);
4595 }
4596
4597 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4598                                 int flags, struct net_device *dev,
4599                                 u8 *dst, u8 *next_hop,
4600                                 struct mpath_info *pinfo)
4601 {
4602         void *hdr;
4603         struct nlattr *pinfoattr;
4604
4605         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4606         if (!hdr)
4607                 return -1;
4608
4609         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4610             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4611             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4612             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4613                 goto nla_put_failure;
4614
4615         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4616         if (!pinfoattr)
4617                 goto nla_put_failure;
4618         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4619             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4620                         pinfo->frame_qlen))
4621                 goto nla_put_failure;
4622         if (((pinfo->filled & MPATH_INFO_SN) &&
4623              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4624             ((pinfo->filled & MPATH_INFO_METRIC) &&
4625              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4626                          pinfo->metric)) ||
4627             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4628              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4629                          pinfo->exptime)) ||
4630             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4631              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4632                         pinfo->flags)) ||
4633             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4634              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4635                          pinfo->discovery_timeout)) ||
4636             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4637              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4638                         pinfo->discovery_retries)))
4639                 goto nla_put_failure;
4640
4641         nla_nest_end(msg, pinfoattr);
4642
4643         genlmsg_end(msg, hdr);
4644         return 0;
4645
4646  nla_put_failure:
4647         genlmsg_cancel(msg, hdr);
4648         return -EMSGSIZE;
4649 }
4650
4651 static int nl80211_dump_mpath(struct sk_buff *skb,
4652                               struct netlink_callback *cb)
4653 {
4654         struct mpath_info pinfo;
4655         struct cfg80211_registered_device *rdev;
4656         struct wireless_dev *wdev;
4657         u8 dst[ETH_ALEN];
4658         u8 next_hop[ETH_ALEN];
4659         int path_idx = cb->args[2];
4660         int err;
4661
4662         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4663         if (err)
4664                 return err;
4665
4666         if (!rdev->ops->dump_mpath) {
4667                 err = -EOPNOTSUPP;
4668                 goto out_err;
4669         }
4670
4671         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4672                 err = -EOPNOTSUPP;
4673                 goto out_err;
4674         }
4675
4676         while (1) {
4677                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4678                                       next_hop, &pinfo);
4679                 if (err == -ENOENT)
4680                         break;
4681                 if (err)
4682                         goto out_err;
4683
4684                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4685                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4686                                        wdev->netdev, dst, next_hop,
4687                                        &pinfo) < 0)
4688                         goto out;
4689
4690                 path_idx++;
4691         }
4692
4693
4694  out:
4695         cb->args[2] = path_idx;
4696         err = skb->len;
4697  out_err:
4698         nl80211_finish_wdev_dump(rdev);
4699         return err;
4700 }
4701
4702 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4703 {
4704         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4705         int err;
4706         struct net_device *dev = info->user_ptr[1];
4707         struct mpath_info pinfo;
4708         struct sk_buff *msg;
4709         u8 *dst = NULL;
4710         u8 next_hop[ETH_ALEN];
4711
4712         memset(&pinfo, 0, sizeof(pinfo));
4713
4714         if (!info->attrs[NL80211_ATTR_MAC])
4715                 return -EINVAL;
4716
4717         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4718
4719         if (!rdev->ops->get_mpath)
4720                 return -EOPNOTSUPP;
4721
4722         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4723                 return -EOPNOTSUPP;
4724
4725         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4726         if (err)
4727                 return err;
4728
4729         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4730         if (!msg)
4731                 return -ENOMEM;
4732
4733         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4734                                  dev, dst, next_hop, &pinfo) < 0) {
4735                 nlmsg_free(msg);
4736                 return -ENOBUFS;
4737         }
4738
4739         return genlmsg_reply(msg, info);
4740 }
4741
4742 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4743 {
4744         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4745         struct net_device *dev = info->user_ptr[1];
4746         u8 *dst = NULL;
4747         u8 *next_hop = NULL;
4748
4749         if (!info->attrs[NL80211_ATTR_MAC])
4750                 return -EINVAL;
4751
4752         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4753                 return -EINVAL;
4754
4755         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4756         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4757
4758         if (!rdev->ops->change_mpath)
4759                 return -EOPNOTSUPP;
4760
4761         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4762                 return -EOPNOTSUPP;
4763
4764         return rdev_change_mpath(rdev, dev, dst, next_hop);
4765 }
4766
4767 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4768 {
4769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4770         struct net_device *dev = info->user_ptr[1];
4771         u8 *dst = NULL;
4772         u8 *next_hop = NULL;
4773
4774         if (!info->attrs[NL80211_ATTR_MAC])
4775                 return -EINVAL;
4776
4777         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4778                 return -EINVAL;
4779
4780         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4781         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4782
4783         if (!rdev->ops->add_mpath)
4784                 return -EOPNOTSUPP;
4785
4786         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4787                 return -EOPNOTSUPP;
4788
4789         return rdev_add_mpath(rdev, dev, dst, next_hop);
4790 }
4791
4792 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4793 {
4794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4795         struct net_device *dev = info->user_ptr[1];
4796         u8 *dst = NULL;
4797
4798         if (info->attrs[NL80211_ATTR_MAC])
4799                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4800
4801         if (!rdev->ops->del_mpath)
4802                 return -EOPNOTSUPP;
4803
4804         return rdev_del_mpath(rdev, dev, dst);
4805 }
4806
4807 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4808 {
4809         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4810         int err;
4811         struct net_device *dev = info->user_ptr[1];
4812         struct mpath_info pinfo;
4813         struct sk_buff *msg;
4814         u8 *dst = NULL;
4815         u8 mpp[ETH_ALEN];
4816
4817         memset(&pinfo, 0, sizeof(pinfo));
4818
4819         if (!info->attrs[NL80211_ATTR_MAC])
4820                 return -EINVAL;
4821
4822         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4823
4824         if (!rdev->ops->get_mpp)
4825                 return -EOPNOTSUPP;
4826
4827         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4828                 return -EOPNOTSUPP;
4829
4830         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4831         if (err)
4832                 return err;
4833
4834         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4835         if (!msg)
4836                 return -ENOMEM;
4837
4838         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4839                                dev, dst, mpp, &pinfo) < 0) {
4840                 nlmsg_free(msg);
4841                 return -ENOBUFS;
4842         }
4843
4844         return genlmsg_reply(msg, info);
4845 }
4846
4847 static int nl80211_dump_mpp(struct sk_buff *skb,
4848                             struct netlink_callback *cb)
4849 {
4850         struct mpath_info pinfo;
4851         struct cfg80211_registered_device *rdev;
4852         struct wireless_dev *wdev;
4853         u8 dst[ETH_ALEN];
4854         u8 mpp[ETH_ALEN];
4855         int path_idx = cb->args[2];
4856         int err;
4857
4858         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4859         if (err)
4860                 return err;
4861
4862         if (!rdev->ops->dump_mpp) {
4863                 err = -EOPNOTSUPP;
4864                 goto out_err;
4865         }
4866
4867         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4868                 err = -EOPNOTSUPP;
4869                 goto out_err;
4870         }
4871
4872         while (1) {
4873                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4874                                     mpp, &pinfo);
4875                 if (err == -ENOENT)
4876                         break;
4877                 if (err)
4878                         goto out_err;
4879
4880                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4881                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4882                                        wdev->netdev, dst, mpp,
4883                                        &pinfo) < 0)
4884                         goto out;
4885
4886                 path_idx++;
4887         }
4888
4889  out:
4890         cb->args[2] = path_idx;
4891         err = skb->len;
4892  out_err:
4893         nl80211_finish_wdev_dump(rdev);
4894         return err;
4895 }
4896
4897 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4898 {
4899         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4900         struct net_device *dev = info->user_ptr[1];
4901         struct wireless_dev *wdev = dev->ieee80211_ptr;
4902         struct bss_parameters params;
4903         int err;
4904
4905         memset(&params, 0, sizeof(params));
4906         /* default to not changing parameters */
4907         params.use_cts_prot = -1;
4908         params.use_short_preamble = -1;
4909         params.use_short_slot_time = -1;
4910         params.ap_isolate = -1;
4911         params.ht_opmode = -1;
4912         params.p2p_ctwindow = -1;
4913         params.p2p_opp_ps = -1;
4914
4915         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4916                 params.use_cts_prot =
4917                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4918         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4919                 params.use_short_preamble =
4920                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4921         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4922                 params.use_short_slot_time =
4923                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4924         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4925                 params.basic_rates =
4926                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4927                 params.basic_rates_len =
4928                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4929         }
4930         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4931                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4932         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4933                 params.ht_opmode =
4934                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4935
4936         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4937                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4938                         return -EINVAL;
4939                 params.p2p_ctwindow =
4940                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4941                 if (params.p2p_ctwindow < 0)
4942                         return -EINVAL;
4943                 if (params.p2p_ctwindow != 0 &&
4944                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4945                         return -EINVAL;
4946         }
4947
4948         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4949                 u8 tmp;
4950
4951                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4952                         return -EINVAL;
4953                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4954                 if (tmp > 1)
4955                         return -EINVAL;
4956                 params.p2p_opp_ps = tmp;
4957                 if (params.p2p_opp_ps &&
4958                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4959                         return -EINVAL;
4960         }
4961
4962         if (!rdev->ops->change_bss)
4963                 return -EOPNOTSUPP;
4964
4965         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4966             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4967                 return -EOPNOTSUPP;
4968
4969         wdev_lock(wdev);
4970         err = rdev_change_bss(rdev, dev, &params);
4971         wdev_unlock(wdev);
4972
4973         return err;
4974 }
4975
4976 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4977 {
4978         char *data = NULL;
4979         bool is_indoor;
4980         enum nl80211_user_reg_hint_type user_reg_hint_type;
4981         u32 owner_nlportid;
4982
4983
4984         /*
4985          * You should only get this when cfg80211 hasn't yet initialized
4986          * completely when built-in to the kernel right between the time
4987          * window between nl80211_init() and regulatory_init(), if that is
4988          * even possible.
4989          */
4990         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4991                 return -EINPROGRESS;
4992
4993         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4994                 user_reg_hint_type =
4995                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4996         else
4997                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4998
4999         switch (user_reg_hint_type) {
5000         case NL80211_USER_REG_HINT_USER:
5001         case NL80211_USER_REG_HINT_CELL_BASE:
5002                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5003                         return -EINVAL;
5004
5005                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5006                 return regulatory_hint_user(data, user_reg_hint_type);
5007         case NL80211_USER_REG_HINT_INDOOR:
5008                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5009                         owner_nlportid = info->snd_portid;
5010                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5011                 } else {
5012                         owner_nlportid = 0;
5013                         is_indoor = true;
5014                 }
5015
5016                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5017         default:
5018                 return -EINVAL;
5019         }
5020 }
5021
5022 static int nl80211_get_mesh_config(struct sk_buff *skb,
5023                                    struct genl_info *info)
5024 {
5025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5026         struct net_device *dev = info->user_ptr[1];
5027         struct wireless_dev *wdev = dev->ieee80211_ptr;
5028         struct mesh_config cur_params;
5029         int err = 0;
5030         void *hdr;
5031         struct nlattr *pinfoattr;
5032         struct sk_buff *msg;
5033
5034         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5035                 return -EOPNOTSUPP;
5036
5037         if (!rdev->ops->get_mesh_config)
5038                 return -EOPNOTSUPP;
5039
5040         wdev_lock(wdev);
5041         /* If not connected, get default parameters */
5042         if (!wdev->mesh_id_len)
5043                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5044         else
5045                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5046         wdev_unlock(wdev);
5047
5048         if (err)
5049                 return err;
5050
5051         /* Draw up a netlink message to send back */
5052         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5053         if (!msg)
5054                 return -ENOMEM;
5055         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5056                              NL80211_CMD_GET_MESH_CONFIG);
5057         if (!hdr)
5058                 goto out;
5059         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5060         if (!pinfoattr)
5061                 goto nla_put_failure;
5062         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5063             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5064                         cur_params.dot11MeshRetryTimeout) ||
5065             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5066                         cur_params.dot11MeshConfirmTimeout) ||
5067             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5068                         cur_params.dot11MeshHoldingTimeout) ||
5069             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5070                         cur_params.dot11MeshMaxPeerLinks) ||
5071             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5072                        cur_params.dot11MeshMaxRetries) ||
5073             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5074                        cur_params.dot11MeshTTL) ||
5075             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5076                        cur_params.element_ttl) ||
5077             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5078                        cur_params.auto_open_plinks) ||
5079             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5080                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5081             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5082                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5083             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5084                         cur_params.path_refresh_time) ||
5085             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5086                         cur_params.min_discovery_timeout) ||
5087             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5088                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5089             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5090                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5091             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5092                         cur_params.dot11MeshHWMPperrMinInterval) ||
5093             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5094                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5095             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5096                        cur_params.dot11MeshHWMPRootMode) ||
5097             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5098                         cur_params.dot11MeshHWMPRannInterval) ||
5099             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5100                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5101             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5102                        cur_params.dot11MeshForwarding) ||
5103             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5104                         cur_params.rssi_threshold) ||
5105             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5106                         cur_params.ht_opmode) ||
5107             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5108                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5109             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5110                         cur_params.dot11MeshHWMProotInterval) ||
5111             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5112                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5113             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5114                         cur_params.power_mode) ||
5115             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5116                         cur_params.dot11MeshAwakeWindowDuration) ||
5117             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5118                         cur_params.plink_timeout))
5119                 goto nla_put_failure;
5120         nla_nest_end(msg, pinfoattr);
5121         genlmsg_end(msg, hdr);
5122         return genlmsg_reply(msg, info);
5123
5124  nla_put_failure:
5125         genlmsg_cancel(msg, hdr);
5126  out:
5127         nlmsg_free(msg);
5128         return -ENOBUFS;
5129 }
5130
5131 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5132         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5133         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5134         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5135         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5136         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5137         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5138         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5139         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5140         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5141         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5142         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5143         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5144         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5145         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5146         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5147         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5148         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5149         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5150         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5151         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5152         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5153         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5154         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5155         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5156         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5157         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5158         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5159         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5160 };
5161
5162 static const struct nla_policy
5163         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5164         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5165         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5166         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5167         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5168         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5169         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5170         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5171                                     .len = IEEE80211_MAX_DATA_LEN },
5172         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5173 };
5174
5175 static int nl80211_parse_mesh_config(struct genl_info *info,
5176                                      struct mesh_config *cfg,
5177                                      u32 *mask_out)
5178 {
5179         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5180         u32 mask = 0;
5181
5182 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5183 do {                                                                        \
5184         if (tb[attr]) {                                                     \
5185                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5186                         return -EINVAL;                                     \
5187                 cfg->param = fn(tb[attr]);                                  \
5188                 mask |= (1 << (attr - 1));                                  \
5189         }                                                                   \
5190 } while (0)
5191
5192
5193         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5194                 return -EINVAL;
5195         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5196                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5197                              nl80211_meshconf_params_policy))
5198                 return -EINVAL;
5199
5200         /* This makes sure that there aren't more than 32 mesh config
5201          * parameters (otherwise our bitfield scheme would not work.) */
5202         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5203
5204         /* Fill in the params struct */
5205         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5206                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5207                                   nla_get_u16);
5208         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5209                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5210                                   nla_get_u16);
5211         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5212                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5213                                   nla_get_u16);
5214         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5215                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5216                                   nla_get_u16);
5217         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5218                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5219                                   nla_get_u8);
5220         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5221                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5222         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5223                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5224                                   nla_get_u8);
5225         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5226                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5227                                   nla_get_u8);
5228         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5229                                   1, 255, mask,
5230                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5231                                   nla_get_u32);
5232         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5233                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5234                                   nla_get_u8);
5235         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5236                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5237                                   nla_get_u32);
5238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5239                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5240                                   nla_get_u16);
5241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5242                                   1, 65535, mask,
5243                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5244                                   nla_get_u32);
5245         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5246                                   1, 65535, mask,
5247                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5248                                   nla_get_u16);
5249         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5250                                   1, 65535, mask,
5251                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5252                                   nla_get_u16);
5253         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5254                                   dot11MeshHWMPnetDiameterTraversalTime,
5255                                   1, 65535, mask,
5256                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5257                                   nla_get_u16);
5258         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5259                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5260                                   nla_get_u8);
5261         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5262                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5263                                   nla_get_u16);
5264         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5265                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5266                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5267                                   nla_get_u8);
5268         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5269                                   mask, NL80211_MESHCONF_FORWARDING,
5270                                   nla_get_u8);
5271         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5272                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5273                                   nla_get_s32);
5274         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5275                                   mask, NL80211_MESHCONF_HT_OPMODE,
5276                                   nla_get_u16);
5277         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5278                                   1, 65535, mask,
5279                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5280                                   nla_get_u32);
5281         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5282                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5283                                   nla_get_u16);
5284         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5285                                   dot11MeshHWMPconfirmationInterval,
5286                                   1, 65535, mask,
5287                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5288                                   nla_get_u16);
5289         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5290                                   NL80211_MESH_POWER_ACTIVE,
5291                                   NL80211_MESH_POWER_MAX,
5292                                   mask, NL80211_MESHCONF_POWER_MODE,
5293                                   nla_get_u32);
5294         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5295                                   0, 65535, mask,
5296                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5297         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5298                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5299                                   nla_get_u32);
5300         if (mask_out)
5301                 *mask_out = mask;
5302
5303         return 0;
5304
5305 #undef FILL_IN_MESH_PARAM_IF_SET
5306 }
5307
5308 static int nl80211_parse_mesh_setup(struct genl_info *info,
5309                                      struct mesh_setup *setup)
5310 {
5311         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5312         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5313
5314         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5315                 return -EINVAL;
5316         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5317                              info->attrs[NL80211_ATTR_MESH_SETUP],
5318                              nl80211_mesh_setup_params_policy))
5319                 return -EINVAL;
5320
5321         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5322                 setup->sync_method =
5323                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5324                  IEEE80211_SYNC_METHOD_VENDOR :
5325                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5326
5327         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5328                 setup->path_sel_proto =
5329                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5330                  IEEE80211_PATH_PROTOCOL_VENDOR :
5331                  IEEE80211_PATH_PROTOCOL_HWMP;
5332
5333         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5334                 setup->path_metric =
5335                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5336                  IEEE80211_PATH_METRIC_VENDOR :
5337                  IEEE80211_PATH_METRIC_AIRTIME;
5338
5339
5340         if (tb[NL80211_MESH_SETUP_IE]) {
5341                 struct nlattr *ieattr =
5342                         tb[NL80211_MESH_SETUP_IE];
5343                 if (!is_valid_ie_attr(ieattr))
5344                         return -EINVAL;
5345                 setup->ie = nla_data(ieattr);
5346                 setup->ie_len = nla_len(ieattr);
5347         }
5348         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5349             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5350                 return -EINVAL;
5351         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5352         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5353         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5354         if (setup->is_secure)
5355                 setup->user_mpm = true;
5356
5357         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5358                 if (!setup->user_mpm)
5359                         return -EINVAL;
5360                 setup->auth_id =
5361                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5362         }
5363
5364         return 0;
5365 }
5366
5367 static int nl80211_update_mesh_config(struct sk_buff *skb,
5368                                       struct genl_info *info)
5369 {
5370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5371         struct net_device *dev = info->user_ptr[1];
5372         struct wireless_dev *wdev = dev->ieee80211_ptr;
5373         struct mesh_config cfg;
5374         u32 mask;
5375         int err;
5376
5377         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5378                 return -EOPNOTSUPP;
5379
5380         if (!rdev->ops->update_mesh_config)
5381                 return -EOPNOTSUPP;
5382
5383         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5384         if (err)
5385                 return err;
5386
5387         wdev_lock(wdev);
5388         if (!wdev->mesh_id_len)
5389                 err = -ENOLINK;
5390
5391         if (!err)
5392                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5393
5394         wdev_unlock(wdev);
5395
5396         return err;
5397 }
5398
5399 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5400                               struct sk_buff *msg)
5401 {
5402         struct nlattr *nl_reg_rules;
5403         unsigned int i;
5404
5405         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5406             (regdom->dfs_region &&
5407              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5408                 goto nla_put_failure;
5409
5410         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5411         if (!nl_reg_rules)
5412                 goto nla_put_failure;
5413
5414         for (i = 0; i < regdom->n_reg_rules; i++) {
5415                 struct nlattr *nl_reg_rule;
5416                 const struct ieee80211_reg_rule *reg_rule;
5417                 const struct ieee80211_freq_range *freq_range;
5418                 const struct ieee80211_power_rule *power_rule;
5419                 unsigned int max_bandwidth_khz;
5420
5421                 reg_rule = &regdom->reg_rules[i];
5422                 freq_range = &reg_rule->freq_range;
5423                 power_rule = &reg_rule->power_rule;
5424
5425                 nl_reg_rule = nla_nest_start(msg, i);
5426                 if (!nl_reg_rule)
5427                         goto nla_put_failure;
5428
5429                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5430                 if (!max_bandwidth_khz)
5431                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5432                                                                   reg_rule);
5433
5434                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5435                                 reg_rule->flags) ||
5436                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5437                                 freq_range->start_freq_khz) ||
5438                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5439                                 freq_range->end_freq_khz) ||
5440                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5441                                 max_bandwidth_khz) ||
5442                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5443                                 power_rule->max_antenna_gain) ||
5444                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5445                                 power_rule->max_eirp) ||
5446                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5447                                 reg_rule->dfs_cac_ms))
5448                         goto nla_put_failure;
5449
5450                 nla_nest_end(msg, nl_reg_rule);
5451         }
5452
5453         nla_nest_end(msg, nl_reg_rules);
5454         return 0;
5455
5456 nla_put_failure:
5457         return -EMSGSIZE;
5458 }
5459
5460 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5461 {
5462         const struct ieee80211_regdomain *regdom = NULL;
5463         struct cfg80211_registered_device *rdev;
5464         struct wiphy *wiphy = NULL;
5465         struct sk_buff *msg;
5466         void *hdr;
5467
5468         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5469         if (!msg)
5470                 return -ENOBUFS;
5471
5472         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5473                              NL80211_CMD_GET_REG);
5474         if (!hdr)
5475                 goto put_failure;
5476
5477         if (info->attrs[NL80211_ATTR_WIPHY]) {
5478                 bool self_managed;
5479
5480                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5481                 if (IS_ERR(rdev)) {
5482                         nlmsg_free(msg);
5483                         return PTR_ERR(rdev);
5484                 }
5485
5486                 wiphy = &rdev->wiphy;
5487                 self_managed = wiphy->regulatory_flags &
5488                                REGULATORY_WIPHY_SELF_MANAGED;
5489                 regdom = get_wiphy_regdom(wiphy);
5490
5491                 /* a self-managed-reg device must have a private regdom */
5492                 if (WARN_ON(!regdom && self_managed)) {
5493                         nlmsg_free(msg);
5494                         return -EINVAL;
5495                 }
5496
5497                 if (regdom &&
5498                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5499                         goto nla_put_failure;
5500         }
5501
5502         if (!wiphy && reg_last_request_cell_base() &&
5503             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5504                         NL80211_USER_REG_HINT_CELL_BASE))
5505                 goto nla_put_failure;
5506
5507         rcu_read_lock();
5508
5509         if (!regdom)
5510                 regdom = rcu_dereference(cfg80211_regdomain);
5511
5512         if (nl80211_put_regdom(regdom, msg))
5513                 goto nla_put_failure_rcu;
5514
5515         rcu_read_unlock();
5516
5517         genlmsg_end(msg, hdr);
5518         return genlmsg_reply(msg, info);
5519
5520 nla_put_failure_rcu:
5521         rcu_read_unlock();
5522 nla_put_failure:
5523         genlmsg_cancel(msg, hdr);
5524 put_failure:
5525         nlmsg_free(msg);
5526         return -EMSGSIZE;
5527 }
5528
5529 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5530                                u32 seq, int flags, struct wiphy *wiphy,
5531                                const struct ieee80211_regdomain *regdom)
5532 {
5533         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5534                                    NL80211_CMD_GET_REG);
5535
5536         if (!hdr)
5537                 return -1;
5538
5539         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5540
5541         if (nl80211_put_regdom(regdom, msg))
5542                 goto nla_put_failure;
5543
5544         if (!wiphy && reg_last_request_cell_base() &&
5545             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5546                         NL80211_USER_REG_HINT_CELL_BASE))
5547                 goto nla_put_failure;
5548
5549         if (wiphy &&
5550             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5551                 goto nla_put_failure;
5552
5553         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5554             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5555                 goto nla_put_failure;
5556
5557         genlmsg_end(msg, hdr);
5558         return 0;
5559
5560 nla_put_failure:
5561         genlmsg_cancel(msg, hdr);
5562         return -EMSGSIZE;
5563 }
5564
5565 static int nl80211_get_reg_dump(struct sk_buff *skb,
5566                                 struct netlink_callback *cb)
5567 {
5568         const struct ieee80211_regdomain *regdom = NULL;
5569         struct cfg80211_registered_device *rdev;
5570         int err, reg_idx, start = cb->args[2];
5571
5572         rtnl_lock();
5573
5574         if (cfg80211_regdomain && start == 0) {
5575                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5576                                           NLM_F_MULTI, NULL,
5577                                           rtnl_dereference(cfg80211_regdomain));
5578                 if (err < 0)
5579                         goto out_err;
5580         }
5581
5582         /* the global regdom is idx 0 */
5583         reg_idx = 1;
5584         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5585                 regdom = get_wiphy_regdom(&rdev->wiphy);
5586                 if (!regdom)
5587                         continue;
5588
5589                 if (++reg_idx <= start)
5590                         continue;
5591
5592                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5593                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5594                 if (err < 0) {
5595                         reg_idx--;
5596                         break;
5597                 }
5598         }
5599
5600         cb->args[2] = reg_idx;
5601         err = skb->len;
5602 out_err:
5603         rtnl_unlock();
5604         return err;
5605 }
5606
5607 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5608 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5609         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5610         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5611         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5612         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5613         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5614         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5615         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5616 };
5617
5618 static int parse_reg_rule(struct nlattr *tb[],
5619         struct ieee80211_reg_rule *reg_rule)
5620 {
5621         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5622         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5623
5624         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5625                 return -EINVAL;
5626         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5627                 return -EINVAL;
5628         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5629                 return -EINVAL;
5630         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5631                 return -EINVAL;
5632         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5633                 return -EINVAL;
5634
5635         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5636
5637         freq_range->start_freq_khz =
5638                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5639         freq_range->end_freq_khz =
5640                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5641         freq_range->max_bandwidth_khz =
5642                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5643
5644         power_rule->max_eirp =
5645                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5646
5647         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5648                 power_rule->max_antenna_gain =
5649                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5650
5651         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5652                 reg_rule->dfs_cac_ms =
5653                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5654
5655         return 0;
5656 }
5657
5658 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5659 {
5660         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5661         struct nlattr *nl_reg_rule;
5662         char *alpha2;
5663         int rem_reg_rules, r;
5664         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5665         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5666         struct ieee80211_regdomain *rd;
5667
5668         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5669                 return -EINVAL;
5670
5671         if (!info->attrs[NL80211_ATTR_REG_RULES])
5672                 return -EINVAL;
5673
5674         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5675
5676         if (info->attrs[NL80211_ATTR_DFS_REGION])
5677                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5678
5679         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5680                             rem_reg_rules) {
5681                 num_rules++;
5682                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5683                         return -EINVAL;
5684         }
5685
5686         if (!reg_is_valid_request(alpha2))
5687                 return -EINVAL;
5688
5689         size_of_regd = sizeof(struct ieee80211_regdomain) +
5690                        num_rules * sizeof(struct ieee80211_reg_rule);
5691
5692         rd = kzalloc(size_of_regd, GFP_KERNEL);
5693         if (!rd)
5694                 return -ENOMEM;
5695
5696         rd->n_reg_rules = num_rules;
5697         rd->alpha2[0] = alpha2[0];
5698         rd->alpha2[1] = alpha2[1];
5699
5700         /*
5701          * Disable DFS master mode if the DFS region was
5702          * not supported or known on this kernel.
5703          */
5704         if (reg_supported_dfs_region(dfs_region))
5705                 rd->dfs_region = dfs_region;
5706
5707         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5708                             rem_reg_rules) {
5709                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5710                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5711                               reg_rule_policy);
5712                 if (r)
5713                         goto bad_reg;
5714                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5715                 if (r)
5716                         goto bad_reg;
5717
5718                 rule_idx++;
5719
5720                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5721                         r = -EINVAL;
5722                         goto bad_reg;
5723                 }
5724         }
5725
5726         r = set_regdom(rd, REGD_SOURCE_CRDA);
5727         /* set_regdom took ownership */
5728         rd = NULL;
5729
5730  bad_reg:
5731         kfree(rd);
5732         return r;
5733 }
5734 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5735
5736 static int validate_scan_freqs(struct nlattr *freqs)
5737 {
5738         struct nlattr *attr1, *attr2;
5739         int n_channels = 0, tmp1, tmp2;
5740
5741         nla_for_each_nested(attr1, freqs, tmp1) {
5742                 n_channels++;
5743                 /*
5744                  * Some hardware has a limited channel list for
5745                  * scanning, and it is pretty much nonsensical
5746                  * to scan for a channel twice, so disallow that
5747                  * and don't require drivers to check that the
5748                  * channel list they get isn't longer than what
5749                  * they can scan, as long as they can scan all
5750                  * the channels they registered at once.
5751                  */
5752                 nla_for_each_nested(attr2, freqs, tmp2)
5753                         if (attr1 != attr2 &&
5754                             nla_get_u32(attr1) == nla_get_u32(attr2))
5755                                 return 0;
5756         }
5757
5758         return n_channels;
5759 }
5760
5761 static int nl80211_parse_random_mac(struct nlattr **attrs,
5762                                     u8 *mac_addr, u8 *mac_addr_mask)
5763 {
5764         int i;
5765
5766         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5767                 eth_zero_addr(mac_addr);
5768                 eth_zero_addr(mac_addr_mask);
5769                 mac_addr[0] = 0x2;
5770                 mac_addr_mask[0] = 0x3;
5771
5772                 return 0;
5773         }
5774
5775         /* need both or none */
5776         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5777                 return -EINVAL;
5778
5779         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5780         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5781
5782         /* don't allow or configure an mcast address */
5783         if (!is_multicast_ether_addr(mac_addr_mask) ||
5784             is_multicast_ether_addr(mac_addr))
5785                 return -EINVAL;
5786
5787         /*
5788          * allow users to pass a MAC address that has bits set outside
5789          * of the mask, but don't bother drivers with having to deal
5790          * with such bits
5791          */
5792         for (i = 0; i < ETH_ALEN; i++)
5793                 mac_addr[i] &= mac_addr_mask[i];
5794
5795         return 0;
5796 }
5797
5798 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5799 {
5800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5801         struct wireless_dev *wdev = info->user_ptr[1];
5802         struct cfg80211_scan_request *request;
5803         struct nlattr *attr;
5804         struct wiphy *wiphy;
5805         int err, tmp, n_ssids = 0, n_channels, i;
5806         size_t ie_len;
5807
5808         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5809                 return -EINVAL;
5810
5811         wiphy = &rdev->wiphy;
5812
5813         if (!rdev->ops->scan)
5814                 return -EOPNOTSUPP;
5815
5816         if (rdev->scan_req || rdev->scan_msg) {
5817                 err = -EBUSY;
5818                 goto unlock;
5819         }
5820
5821         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5822                 n_channels = validate_scan_freqs(
5823                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5824                 if (!n_channels) {
5825                         err = -EINVAL;
5826                         goto unlock;
5827                 }
5828         } else {
5829                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5830         }
5831
5832         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5833                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5834                         n_ssids++;
5835
5836         if (n_ssids > wiphy->max_scan_ssids) {
5837                 err = -EINVAL;
5838                 goto unlock;
5839         }
5840
5841         if (info->attrs[NL80211_ATTR_IE])
5842                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5843         else
5844                 ie_len = 0;
5845
5846         if (ie_len > wiphy->max_scan_ie_len) {
5847                 err = -EINVAL;
5848                 goto unlock;
5849         }
5850
5851         request = kzalloc(sizeof(*request)
5852                         + sizeof(*request->ssids) * n_ssids
5853                         + sizeof(*request->channels) * n_channels
5854                         + ie_len, GFP_KERNEL);
5855         if (!request) {
5856                 err = -ENOMEM;
5857                 goto unlock;
5858         }
5859
5860         if (n_ssids)
5861                 request->ssids = (void *)&request->channels[n_channels];
5862         request->n_ssids = n_ssids;
5863         if (ie_len) {
5864                 if (n_ssids)
5865                         request->ie = (void *)(request->ssids + n_ssids);
5866                 else
5867                         request->ie = (void *)(request->channels + n_channels);
5868         }
5869
5870         i = 0;
5871         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5872                 /* user specified, bail out if channel not found */
5873                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5874                         struct ieee80211_channel *chan;
5875
5876                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5877
5878                         if (!chan) {
5879                                 err = -EINVAL;
5880                                 goto out_free;
5881                         }
5882
5883                         /* ignore disabled channels */
5884                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5885                                 continue;
5886
5887                         request->channels[i] = chan;
5888                         i++;
5889                 }
5890         } else {
5891                 enum ieee80211_band band;
5892
5893                 /* all channels */
5894                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5895                         int j;
5896                         if (!wiphy->bands[band])
5897                                 continue;
5898                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5899                                 struct ieee80211_channel *chan;
5900
5901                                 chan = &wiphy->bands[band]->channels[j];
5902
5903                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5904                                         continue;
5905
5906                                 request->channels[i] = chan;
5907                                 i++;
5908                         }
5909                 }
5910         }
5911
5912         if (!i) {
5913                 err = -EINVAL;
5914                 goto out_free;
5915         }
5916
5917         request->n_channels = i;
5918
5919         i = 0;
5920         if (n_ssids) {
5921                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5922                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5923                                 err = -EINVAL;
5924                                 goto out_free;
5925                         }
5926                         request->ssids[i].ssid_len = nla_len(attr);
5927                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5928                         i++;
5929                 }
5930         }
5931
5932         if (info->attrs[NL80211_ATTR_IE]) {
5933                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5934                 memcpy((void *)request->ie,
5935                        nla_data(info->attrs[NL80211_ATTR_IE]),
5936                        request->ie_len);
5937         }
5938
5939         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5940                 if (wiphy->bands[i])
5941                         request->rates[i] =
5942                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5943
5944         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5945                 nla_for_each_nested(attr,
5946                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5947                                     tmp) {
5948                         enum ieee80211_band band = nla_type(attr);
5949
5950                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5951                                 err = -EINVAL;
5952                                 goto out_free;
5953                         }
5954
5955                         if (!wiphy->bands[band])
5956                                 continue;
5957
5958                         err = ieee80211_get_ratemask(wiphy->bands[band],
5959                                                      nla_data(attr),
5960                                                      nla_len(attr),
5961                                                      &request->rates[band]);
5962                         if (err)
5963                                 goto out_free;
5964                 }
5965         }
5966
5967         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5968                 request->flags = nla_get_u32(
5969                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5970                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5971                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5972                         err = -EOPNOTSUPP;
5973                         goto out_free;
5974                 }
5975
5976                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5977                         if (!(wiphy->features &
5978                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5979                                 err = -EOPNOTSUPP;
5980                                 goto out_free;
5981                         }
5982
5983                         if (wdev->current_bss) {
5984                                 err = -EOPNOTSUPP;
5985                                 goto out_free;
5986                         }
5987
5988                         err = nl80211_parse_random_mac(info->attrs,
5989                                                        request->mac_addr,
5990                                                        request->mac_addr_mask);
5991                         if (err)
5992                                 goto out_free;
5993                 }
5994         }
5995
5996         request->no_cck =
5997                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5998
5999         request->wdev = wdev;
6000         request->wiphy = &rdev->wiphy;
6001         request->scan_start = jiffies;
6002
6003         rdev->scan_req = request;
6004         err = rdev_scan(rdev, request);
6005
6006         if (!err) {
6007                 nl80211_send_scan_start(rdev, wdev);
6008                 if (wdev->netdev)
6009                         dev_hold(wdev->netdev);
6010         } else {
6011  out_free:
6012                 rdev->scan_req = NULL;
6013                 kfree(request);
6014         }
6015
6016  unlock:
6017         return err;
6018 }
6019
6020 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6021 {
6022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6023         struct wireless_dev *wdev = info->user_ptr[1];
6024
6025         if (!rdev->ops->abort_scan)
6026                 return -EOPNOTSUPP;
6027
6028         if (rdev->scan_msg)
6029                 return 0;
6030
6031         if (!rdev->scan_req)
6032                 return -ENOENT;
6033
6034         rdev_abort_scan(rdev, wdev);
6035         return 0;
6036 }
6037
6038 static int
6039 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6040                                struct cfg80211_sched_scan_request *request,
6041                                struct nlattr **attrs)
6042 {
6043         int tmp, err, i = 0;
6044         struct nlattr *attr;
6045
6046         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6047                 u32 interval;
6048
6049                 /*
6050                  * If scan plans are not specified,
6051                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6052                  * case one scan plan will be set with the specified scan
6053                  * interval and infinite number of iterations.
6054                  */
6055                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6056                         return -EINVAL;
6057
6058                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6059                 if (!interval)
6060                         return -EINVAL;
6061
6062                 request->scan_plans[0].interval =
6063                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6064                 if (!request->scan_plans[0].interval)
6065                         return -EINVAL;
6066
6067                 if (request->scan_plans[0].interval >
6068                     wiphy->max_sched_scan_plan_interval)
6069                         request->scan_plans[0].interval =
6070                                 wiphy->max_sched_scan_plan_interval;
6071
6072                 return 0;
6073         }
6074
6075         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6076                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6077
6078                 if (WARN_ON(i >= n_plans))
6079                         return -EINVAL;
6080
6081                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6082                                 nla_data(attr), nla_len(attr),
6083                                 nl80211_plan_policy);
6084                 if (err)
6085                         return err;
6086
6087                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6088                         return -EINVAL;
6089
6090                 request->scan_plans[i].interval =
6091                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6092                 if (!request->scan_plans[i].interval ||
6093                     request->scan_plans[i].interval >
6094                     wiphy->max_sched_scan_plan_interval)
6095                         return -EINVAL;
6096
6097                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6098                         request->scan_plans[i].iterations =
6099                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6100                         if (!request->scan_plans[i].iterations ||
6101                             (request->scan_plans[i].iterations >
6102                              wiphy->max_sched_scan_plan_iterations))
6103                                 return -EINVAL;
6104                 } else if (i < n_plans - 1) {
6105                         /*
6106                          * All scan plans but the last one must specify
6107                          * a finite number of iterations
6108                          */
6109                         return -EINVAL;
6110                 }
6111
6112                 i++;
6113         }
6114
6115         /*
6116          * The last scan plan must not specify the number of
6117          * iterations, it is supposed to run infinitely
6118          */
6119         if (request->scan_plans[n_plans - 1].iterations)
6120                 return  -EINVAL;
6121
6122         return 0;
6123 }
6124
6125 static struct cfg80211_sched_scan_request *
6126 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6127                          struct nlattr **attrs)
6128 {
6129         struct cfg80211_sched_scan_request *request;
6130         struct nlattr *attr;
6131         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6132         enum ieee80211_band band;
6133         size_t ie_len;
6134         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6135         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6136
6137         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6138                 return ERR_PTR(-EINVAL);
6139
6140         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6141                 n_channels = validate_scan_freqs(
6142                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6143                 if (!n_channels)
6144                         return ERR_PTR(-EINVAL);
6145         } else {
6146                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6147         }
6148
6149         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6150                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6151                                     tmp)
6152                         n_ssids++;
6153
6154         if (n_ssids > wiphy->max_sched_scan_ssids)
6155                 return ERR_PTR(-EINVAL);
6156
6157         /*
6158          * First, count the number of 'real' matchsets. Due to an issue with
6159          * the old implementation, matchsets containing only the RSSI attribute
6160          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6161          * RSSI for all matchsets, rather than their own matchset for reporting
6162          * all APs with a strong RSSI. This is needed to be compatible with
6163          * older userspace that treated a matchset with only the RSSI as the
6164          * global RSSI for all other matchsets - if there are other matchsets.
6165          */
6166         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6167                 nla_for_each_nested(attr,
6168                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6169                                     tmp) {
6170                         struct nlattr *rssi;
6171
6172                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6173                                         nla_data(attr), nla_len(attr),
6174                                         nl80211_match_policy);
6175                         if (err)
6176                                 return ERR_PTR(err);
6177                         /* add other standalone attributes here */
6178                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6179                                 n_match_sets++;
6180                                 continue;
6181                         }
6182                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6183                         if (rssi)
6184                                 default_match_rssi = nla_get_s32(rssi);
6185                 }
6186         }
6187
6188         /* However, if there's no other matchset, add the RSSI one */
6189         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6190                 n_match_sets = 1;
6191
6192         if (n_match_sets > wiphy->max_match_sets)
6193                 return ERR_PTR(-EINVAL);
6194
6195         if (attrs[NL80211_ATTR_IE])
6196                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6197         else
6198                 ie_len = 0;
6199
6200         if (ie_len > wiphy->max_sched_scan_ie_len)
6201                 return ERR_PTR(-EINVAL);
6202
6203         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6204                 /*
6205                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6206                  * each scan plan already specifies its own interval
6207                  */
6208                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6209                         return ERR_PTR(-EINVAL);
6210
6211                 nla_for_each_nested(attr,
6212                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6213                         n_plans++;
6214         } else {
6215                 /*
6216                  * The scan interval attribute is kept for backward
6217                  * compatibility. If no scan plans are specified and sched scan
6218                  * interval is specified, one scan plan will be set with this
6219                  * scan interval and infinite number of iterations.
6220                  */
6221                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6222                         return ERR_PTR(-EINVAL);
6223
6224                 n_plans = 1;
6225         }
6226
6227         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6228                 return ERR_PTR(-EINVAL);
6229
6230         request = kzalloc(sizeof(*request)
6231                         + sizeof(*request->ssids) * n_ssids
6232                         + sizeof(*request->match_sets) * n_match_sets
6233                         + sizeof(*request->scan_plans) * n_plans
6234                         + sizeof(*request->channels) * n_channels
6235                         + ie_len, GFP_KERNEL);
6236         if (!request)
6237                 return ERR_PTR(-ENOMEM);
6238
6239         if (n_ssids)
6240                 request->ssids = (void *)&request->channels[n_channels];
6241         request->n_ssids = n_ssids;
6242         if (ie_len) {
6243                 if (n_ssids)
6244                         request->ie = (void *)(request->ssids + n_ssids);
6245                 else
6246                         request->ie = (void *)(request->channels + n_channels);
6247         }
6248
6249         if (n_match_sets) {
6250                 if (request->ie)
6251                         request->match_sets = (void *)(request->ie + ie_len);
6252                 else if (n_ssids)
6253                         request->match_sets =
6254                                 (void *)(request->ssids + n_ssids);
6255                 else
6256                         request->match_sets =
6257                                 (void *)(request->channels + n_channels);
6258         }
6259         request->n_match_sets = n_match_sets;
6260
6261         if (n_match_sets)
6262                 request->scan_plans = (void *)(request->match_sets +
6263                                                n_match_sets);
6264         else if (request->ie)
6265                 request->scan_plans = (void *)(request->ie + ie_len);
6266         else if (n_ssids)
6267                 request->scan_plans = (void *)(request->ssids + n_ssids);
6268         else
6269                 request->scan_plans = (void *)(request->channels + n_channels);
6270
6271         request->n_scan_plans = n_plans;
6272
6273         i = 0;
6274         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6275                 /* user specified, bail out if channel not found */
6276                 nla_for_each_nested(attr,
6277                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6278                                     tmp) {
6279                         struct ieee80211_channel *chan;
6280
6281                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6282
6283                         if (!chan) {
6284                                 err = -EINVAL;
6285                                 goto out_free;
6286                         }
6287
6288                         /* ignore disabled channels */
6289                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6290                                 continue;
6291
6292                         request->channels[i] = chan;
6293                         i++;
6294                 }
6295         } else {
6296                 /* all channels */
6297                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6298                         int j;
6299                         if (!wiphy->bands[band])
6300                                 continue;
6301                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6302                                 struct ieee80211_channel *chan;
6303
6304                                 chan = &wiphy->bands[band]->channels[j];
6305
6306                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6307                                         continue;
6308
6309                                 request->channels[i] = chan;
6310                                 i++;
6311                         }
6312                 }
6313         }
6314
6315         if (!i) {
6316                 err = -EINVAL;
6317                 goto out_free;
6318         }
6319
6320         request->n_channels = i;
6321
6322         i = 0;
6323         if (n_ssids) {
6324                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6325                                     tmp) {
6326                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6327                                 err = -EINVAL;
6328                                 goto out_free;
6329                         }
6330                         request->ssids[i].ssid_len = nla_len(attr);
6331                         memcpy(request->ssids[i].ssid, nla_data(attr),
6332                                nla_len(attr));
6333                         i++;
6334                 }
6335         }
6336
6337         i = 0;
6338         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6339                 nla_for_each_nested(attr,
6340                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6341                                     tmp) {
6342                         struct nlattr *ssid, *rssi;
6343
6344                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6345                                         nla_data(attr), nla_len(attr),
6346                                         nl80211_match_policy);
6347                         if (err)
6348                                 goto out_free;
6349                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6350                         if (ssid) {
6351                                 if (WARN_ON(i >= n_match_sets)) {
6352                                         /* this indicates a programming error,
6353                                          * the loop above should have verified
6354                                          * things properly
6355                                          */
6356                                         err = -EINVAL;
6357                                         goto out_free;
6358                                 }
6359
6360                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6361                                         err = -EINVAL;
6362                                         goto out_free;
6363                                 }
6364                                 memcpy(request->match_sets[i].ssid.ssid,
6365                                        nla_data(ssid), nla_len(ssid));
6366                                 request->match_sets[i].ssid.ssid_len =
6367                                         nla_len(ssid);
6368                                 /* special attribute - old implemenation w/a */
6369                                 request->match_sets[i].rssi_thold =
6370                                         default_match_rssi;
6371                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6372                                 if (rssi)
6373                                         request->match_sets[i].rssi_thold =
6374                                                 nla_get_s32(rssi);
6375                         }
6376                         i++;
6377                 }
6378
6379                 /* there was no other matchset, so the RSSI one is alone */
6380                 if (i == 0 && n_match_sets)
6381                         request->match_sets[0].rssi_thold = default_match_rssi;
6382
6383                 request->min_rssi_thold = INT_MAX;
6384                 for (i = 0; i < n_match_sets; i++)
6385                         request->min_rssi_thold =
6386                                 min(request->match_sets[i].rssi_thold,
6387                                     request->min_rssi_thold);
6388         } else {
6389                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6390         }
6391
6392         if (ie_len) {
6393                 request->ie_len = ie_len;
6394                 memcpy((void *)request->ie,
6395                        nla_data(attrs[NL80211_ATTR_IE]),
6396                        request->ie_len);
6397         }
6398
6399         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6400                 request->flags = nla_get_u32(
6401                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6402                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6403                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6404                         err = -EOPNOTSUPP;
6405                         goto out_free;
6406                 }
6407
6408                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6409                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6410
6411                         if (!wdev) /* must be net-detect */
6412                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6413
6414                         if (!(wiphy->features & flg)) {
6415                                 err = -EOPNOTSUPP;
6416                                 goto out_free;
6417                         }
6418
6419                         if (wdev && wdev->current_bss) {
6420                                 err = -EOPNOTSUPP;
6421                                 goto out_free;
6422                         }
6423
6424                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6425                                                        request->mac_addr_mask);
6426                         if (err)
6427                                 goto out_free;
6428                 }
6429         }
6430
6431         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6432                 request->delay =
6433                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6434
6435         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6436         if (err)
6437                 goto out_free;
6438
6439         request->scan_start = jiffies;
6440
6441         return request;
6442
6443 out_free:
6444         kfree(request);
6445         return ERR_PTR(err);
6446 }
6447
6448 static int nl80211_start_sched_scan(struct sk_buff *skb,
6449                                     struct genl_info *info)
6450 {
6451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6452         struct net_device *dev = info->user_ptr[1];
6453         struct wireless_dev *wdev = dev->ieee80211_ptr;
6454         struct cfg80211_sched_scan_request *sched_scan_req;
6455         int err;
6456
6457         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6458             !rdev->ops->sched_scan_start)
6459                 return -EOPNOTSUPP;
6460
6461         if (rdev->sched_scan_req)
6462                 return -EINPROGRESS;
6463
6464         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6465                                                   info->attrs);
6466
6467         err = PTR_ERR_OR_ZERO(sched_scan_req);
6468         if (err)
6469                 goto out_err;
6470
6471         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6472         if (err)
6473                 goto out_free;
6474
6475         sched_scan_req->dev = dev;
6476         sched_scan_req->wiphy = &rdev->wiphy;
6477
6478         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6479                 sched_scan_req->owner_nlportid = info->snd_portid;
6480
6481         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6482
6483         nl80211_send_sched_scan(rdev, dev,
6484                                 NL80211_CMD_START_SCHED_SCAN);
6485         return 0;
6486
6487 out_free:
6488         kfree(sched_scan_req);
6489 out_err:
6490         return err;
6491 }
6492
6493 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6494                                    struct genl_info *info)
6495 {
6496         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6497
6498         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6499             !rdev->ops->sched_scan_stop)
6500                 return -EOPNOTSUPP;
6501
6502         return __cfg80211_stop_sched_scan(rdev, false);
6503 }
6504
6505 static int nl80211_start_radar_detection(struct sk_buff *skb,
6506                                          struct genl_info *info)
6507 {
6508         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6509         struct net_device *dev = info->user_ptr[1];
6510         struct wireless_dev *wdev = dev->ieee80211_ptr;
6511         struct cfg80211_chan_def chandef;
6512         enum nl80211_dfs_regions dfs_region;
6513         unsigned int cac_time_ms;
6514         int err;
6515
6516         dfs_region = reg_get_dfs_region(wdev->wiphy);
6517         if (dfs_region == NL80211_DFS_UNSET)
6518                 return -EINVAL;
6519
6520         err = nl80211_parse_chandef(rdev, info, &chandef);
6521         if (err)
6522                 return err;
6523
6524         if (netif_carrier_ok(dev))
6525                 return -EBUSY;
6526
6527         if (wdev->cac_started)
6528                 return -EBUSY;
6529
6530         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6531                                             wdev->iftype);
6532         if (err < 0)
6533                 return err;
6534
6535         if (err == 0)
6536                 return -EINVAL;
6537
6538         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6539                 return -EINVAL;
6540
6541         if (!rdev->ops->start_radar_detection)
6542                 return -EOPNOTSUPP;
6543
6544         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6545         if (WARN_ON(!cac_time_ms))
6546                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6547
6548         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6549         if (!err) {
6550                 wdev->chandef = chandef;
6551                 wdev->cac_started = true;
6552                 wdev->cac_start_time = jiffies;
6553                 wdev->cac_time_ms = cac_time_ms;
6554         }
6555         return err;
6556 }
6557
6558 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6559 {
6560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6561         struct net_device *dev = info->user_ptr[1];
6562         struct wireless_dev *wdev = dev->ieee80211_ptr;
6563         struct cfg80211_csa_settings params;
6564         /* csa_attrs is defined static to avoid waste of stack size - this
6565          * function is called under RTNL lock, so this should not be a problem.
6566          */
6567         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6568         int err;
6569         bool need_new_beacon = false;
6570         int len, i;
6571         u32 cs_count;
6572
6573         if (!rdev->ops->channel_switch ||
6574             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6575                 return -EOPNOTSUPP;
6576
6577         switch (dev->ieee80211_ptr->iftype) {
6578         case NL80211_IFTYPE_AP:
6579         case NL80211_IFTYPE_P2P_GO:
6580                 need_new_beacon = true;
6581
6582                 /* useless if AP is not running */
6583                 if (!wdev->beacon_interval)
6584                         return -ENOTCONN;
6585                 break;
6586         case NL80211_IFTYPE_ADHOC:
6587                 if (!wdev->ssid_len)
6588                         return -ENOTCONN;
6589                 break;
6590         case NL80211_IFTYPE_MESH_POINT:
6591                 if (!wdev->mesh_id_len)
6592                         return -ENOTCONN;
6593                 break;
6594         default:
6595                 return -EOPNOTSUPP;
6596         }
6597
6598         memset(&params, 0, sizeof(params));
6599
6600         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6601             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6602                 return -EINVAL;
6603
6604         /* only important for AP, IBSS and mesh create IEs internally */
6605         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6606                 return -EINVAL;
6607
6608         /* Even though the attribute is u32, the specification says
6609          * u8, so let's make sure we don't overflow.
6610          */
6611         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6612         if (cs_count > 255)
6613                 return -EINVAL;
6614
6615         params.count = cs_count;
6616
6617         if (!need_new_beacon)
6618                 goto skip_beacons;
6619
6620         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6621         if (err)
6622                 return err;
6623
6624         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6625                                info->attrs[NL80211_ATTR_CSA_IES],
6626                                nl80211_policy);
6627         if (err)
6628                 return err;
6629
6630         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6631         if (err)
6632                 return err;
6633
6634         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6635                 return -EINVAL;
6636
6637         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6638         if (!len || (len % sizeof(u16)))
6639                 return -EINVAL;
6640
6641         params.n_counter_offsets_beacon = len / sizeof(u16);
6642         if (rdev->wiphy.max_num_csa_counters &&
6643             (params.n_counter_offsets_beacon >
6644              rdev->wiphy.max_num_csa_counters))
6645                 return -EINVAL;
6646
6647         params.counter_offsets_beacon =
6648                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6649
6650         /* sanity checks - counters should fit and be the same */
6651         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6652                 u16 offset = params.counter_offsets_beacon[i];
6653
6654                 if (offset >= params.beacon_csa.tail_len)
6655                         return -EINVAL;
6656
6657                 if (params.beacon_csa.tail[offset] != params.count)
6658                         return -EINVAL;
6659         }
6660
6661         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6662                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6663                 if (!len || (len % sizeof(u16)))
6664                         return -EINVAL;
6665
6666                 params.n_counter_offsets_presp = len / sizeof(u16);
6667                 if (rdev->wiphy.max_num_csa_counters &&
6668                     (params.n_counter_offsets_beacon >
6669                      rdev->wiphy.max_num_csa_counters))
6670                         return -EINVAL;
6671
6672                 params.counter_offsets_presp =
6673                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6674
6675                 /* sanity checks - counters should fit and be the same */
6676                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6677                         u16 offset = params.counter_offsets_presp[i];
6678
6679                         if (offset >= params.beacon_csa.probe_resp_len)
6680                                 return -EINVAL;
6681
6682                         if (params.beacon_csa.probe_resp[offset] !=
6683                             params.count)
6684                                 return -EINVAL;
6685                 }
6686         }
6687
6688 skip_beacons:
6689         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6690         if (err)
6691                 return err;
6692
6693         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6694                                            wdev->iftype))
6695                 return -EINVAL;
6696
6697         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6698                                             &params.chandef,
6699                                             wdev->iftype);
6700         if (err < 0)
6701                 return err;
6702
6703         if (err > 0)
6704                 params.radar_required = true;
6705
6706         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6707                 params.block_tx = true;
6708
6709         wdev_lock(wdev);
6710         err = rdev_channel_switch(rdev, dev, &params);
6711         wdev_unlock(wdev);
6712
6713         return err;
6714 }
6715
6716 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6717                             u32 seq, int flags,
6718                             struct cfg80211_registered_device *rdev,
6719                             struct wireless_dev *wdev,
6720                             struct cfg80211_internal_bss *intbss)
6721 {
6722         struct cfg80211_bss *res = &intbss->pub;
6723         const struct cfg80211_bss_ies *ies;
6724         void *hdr;
6725         struct nlattr *bss;
6726
6727         ASSERT_WDEV_LOCK(wdev);
6728
6729         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6730                              NL80211_CMD_NEW_SCAN_RESULTS);
6731         if (!hdr)
6732                 return -1;
6733
6734         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6735
6736         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6737                 goto nla_put_failure;
6738         if (wdev->netdev &&
6739             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6740                 goto nla_put_failure;
6741         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6742                 goto nla_put_failure;
6743
6744         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6745         if (!bss)
6746                 goto nla_put_failure;
6747         if ((!is_zero_ether_addr(res->bssid) &&
6748              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6749                 goto nla_put_failure;
6750
6751         rcu_read_lock();
6752         /* indicate whether we have probe response data or not */
6753         if (rcu_access_pointer(res->proberesp_ies) &&
6754             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6755                 goto fail_unlock_rcu;
6756
6757         /* this pointer prefers to be pointed to probe response data
6758          * but is always valid
6759          */
6760         ies = rcu_dereference(res->ies);
6761         if (ies) {
6762                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6763                         goto fail_unlock_rcu;
6764                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6765                                         ies->len, ies->data))
6766                         goto fail_unlock_rcu;
6767         }
6768
6769         /* and this pointer is always (unless driver didn't know) beacon data */
6770         ies = rcu_dereference(res->beacon_ies);
6771         if (ies && ies->from_beacon) {
6772                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6773                         goto fail_unlock_rcu;
6774                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6775                                         ies->len, ies->data))
6776                         goto fail_unlock_rcu;
6777         }
6778         rcu_read_unlock();
6779
6780         if (res->beacon_interval &&
6781             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6782                 goto nla_put_failure;
6783         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6784             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6785             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6786             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6787                         jiffies_to_msecs(jiffies - intbss->ts)))
6788                 goto nla_put_failure;
6789
6790         if (intbss->ts_boottime &&
6791             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6792                         intbss->ts_boottime))
6793                 goto nla_put_failure;
6794
6795         switch (rdev->wiphy.signal_type) {
6796         case CFG80211_SIGNAL_TYPE_MBM:
6797                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6798                         goto nla_put_failure;
6799                 break;
6800         case CFG80211_SIGNAL_TYPE_UNSPEC:
6801                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6802                         goto nla_put_failure;
6803                 break;
6804         default:
6805                 break;
6806         }
6807
6808         switch (wdev->iftype) {
6809         case NL80211_IFTYPE_P2P_CLIENT:
6810         case NL80211_IFTYPE_STATION:
6811                 if (intbss == wdev->current_bss &&
6812                     nla_put_u32(msg, NL80211_BSS_STATUS,
6813                                 NL80211_BSS_STATUS_ASSOCIATED))
6814                         goto nla_put_failure;
6815                 break;
6816         case NL80211_IFTYPE_ADHOC:
6817                 if (intbss == wdev->current_bss &&
6818                     nla_put_u32(msg, NL80211_BSS_STATUS,
6819                                 NL80211_BSS_STATUS_IBSS_JOINED))
6820                         goto nla_put_failure;
6821                 break;
6822         default:
6823                 break;
6824         }
6825
6826         nla_nest_end(msg, bss);
6827
6828         genlmsg_end(msg, hdr);
6829         return 0;
6830
6831  fail_unlock_rcu:
6832         rcu_read_unlock();
6833  nla_put_failure:
6834         genlmsg_cancel(msg, hdr);
6835         return -EMSGSIZE;
6836 }
6837
6838 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6839 {
6840         struct cfg80211_registered_device *rdev;
6841         struct cfg80211_internal_bss *scan;
6842         struct wireless_dev *wdev;
6843         int start = cb->args[2], idx = 0;
6844         int err;
6845
6846         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6847         if (err)
6848                 return err;
6849
6850         wdev_lock(wdev);
6851         spin_lock_bh(&rdev->bss_lock);
6852         cfg80211_bss_expire(rdev);
6853
6854         cb->seq = rdev->bss_generation;
6855
6856         list_for_each_entry(scan, &rdev->bss_list, list) {
6857                 if (++idx <= start)
6858                         continue;
6859                 if (nl80211_send_bss(skb, cb,
6860                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6861                                 rdev, wdev, scan) < 0) {
6862                         idx--;
6863                         break;
6864                 }
6865         }
6866
6867         spin_unlock_bh(&rdev->bss_lock);
6868         wdev_unlock(wdev);
6869
6870         cb->args[2] = idx;
6871         nl80211_finish_wdev_dump(rdev);
6872
6873         return skb->len;
6874 }
6875
6876 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6877                                int flags, struct net_device *dev,
6878                                bool allow_radio_stats,
6879                                struct survey_info *survey)
6880 {
6881         void *hdr;
6882         struct nlattr *infoattr;
6883
6884         /* skip radio stats if userspace didn't request them */
6885         if (!survey->channel && !allow_radio_stats)
6886                 return 0;
6887
6888         hdr = nl80211hdr_put(msg, portid, seq, flags,
6889                              NL80211_CMD_NEW_SURVEY_RESULTS);
6890         if (!hdr)
6891                 return -ENOMEM;
6892
6893         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6894                 goto nla_put_failure;
6895
6896         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6897         if (!infoattr)
6898                 goto nla_put_failure;
6899
6900         if (survey->channel &&
6901             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6902                         survey->channel->center_freq))
6903                 goto nla_put_failure;
6904
6905         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6906             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6907                 goto nla_put_failure;
6908         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6909             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6910                 goto nla_put_failure;
6911         if ((survey->filled & SURVEY_INFO_TIME) &&
6912             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
6913                         survey->time))
6914                 goto nla_put_failure;
6915         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
6916             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
6917                         survey->time_busy))
6918                 goto nla_put_failure;
6919         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
6920             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
6921                         survey->time_ext_busy))
6922                 goto nla_put_failure;
6923         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
6924             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
6925                         survey->time_rx))
6926                 goto nla_put_failure;
6927         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
6928             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
6929                         survey->time_tx))
6930                 goto nla_put_failure;
6931         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
6932             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
6933                         survey->time_scan))
6934                 goto nla_put_failure;
6935
6936         nla_nest_end(msg, infoattr);
6937
6938         genlmsg_end(msg, hdr);
6939         return 0;
6940
6941  nla_put_failure:
6942         genlmsg_cancel(msg, hdr);
6943         return -EMSGSIZE;
6944 }
6945
6946 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
6947 {
6948         struct survey_info survey;
6949         struct cfg80211_registered_device *rdev;
6950         struct wireless_dev *wdev;
6951         int survey_idx = cb->args[2];
6952         int res;
6953         bool radio_stats;
6954
6955         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6956         if (res)
6957                 return res;
6958
6959         /* prepare_wdev_dump parsed the attributes */
6960         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
6961
6962         if (!wdev->netdev) {
6963                 res = -EINVAL;
6964                 goto out_err;
6965         }
6966
6967         if (!rdev->ops->dump_survey) {
6968                 res = -EOPNOTSUPP;
6969                 goto out_err;
6970         }
6971
6972         while (1) {
6973                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6974                 if (res == -ENOENT)
6975                         break;
6976                 if (res)
6977                         goto out_err;
6978
6979                 /* don't send disabled channels, but do send non-channel data */
6980                 if (survey.channel &&
6981                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6982                         survey_idx++;
6983                         continue;
6984                 }
6985
6986                 if (nl80211_send_survey(skb,
6987                                 NETLINK_CB(cb->skb).portid,
6988                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6989                                 wdev->netdev, radio_stats, &survey) < 0)
6990                         goto out;
6991                 survey_idx++;
6992         }
6993
6994  out:
6995         cb->args[2] = survey_idx;
6996         res = skb->len;
6997  out_err:
6998         nl80211_finish_wdev_dump(rdev);
6999         return res;
7000 }
7001
7002 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7003 {
7004         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7005                                   NL80211_WPA_VERSION_2));
7006 }
7007
7008 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7009 {
7010         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7011         struct net_device *dev = info->user_ptr[1];
7012         struct ieee80211_channel *chan;
7013         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7014         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7015         enum nl80211_auth_type auth_type;
7016         struct key_parse key;
7017         bool local_state_change;
7018
7019         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7020                 return -EINVAL;
7021
7022         if (!info->attrs[NL80211_ATTR_MAC])
7023                 return -EINVAL;
7024
7025         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7026                 return -EINVAL;
7027
7028         if (!info->attrs[NL80211_ATTR_SSID])
7029                 return -EINVAL;
7030
7031         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7032                 return -EINVAL;
7033
7034         err = nl80211_parse_key(info, &key);
7035         if (err)
7036                 return err;
7037
7038         if (key.idx >= 0) {
7039                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7040                         return -EINVAL;
7041                 if (!key.p.key || !key.p.key_len)
7042                         return -EINVAL;
7043                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7044                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7045                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7046                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7047                         return -EINVAL;
7048                 if (key.idx > 4)
7049                         return -EINVAL;
7050         } else {
7051                 key.p.key_len = 0;
7052                 key.p.key = NULL;
7053         }
7054
7055         if (key.idx >= 0) {
7056                 int i;
7057                 bool ok = false;
7058                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7059                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7060                                 ok = true;
7061                                 break;
7062                         }
7063                 }
7064                 if (!ok)
7065                         return -EINVAL;
7066         }
7067
7068         if (!rdev->ops->auth)
7069                 return -EOPNOTSUPP;
7070
7071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7072             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7073                 return -EOPNOTSUPP;
7074
7075         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7076         chan = nl80211_get_valid_chan(&rdev->wiphy,
7077                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7078         if (!chan)
7079                 return -EINVAL;
7080
7081         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7082         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7083
7084         if (info->attrs[NL80211_ATTR_IE]) {
7085                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7086                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7087         }
7088
7089         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7090         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7091                 return -EINVAL;
7092
7093         if (auth_type == NL80211_AUTHTYPE_SAE &&
7094             !info->attrs[NL80211_ATTR_SAE_DATA])
7095                 return -EINVAL;
7096
7097         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7098                 if (auth_type != NL80211_AUTHTYPE_SAE)
7099                         return -EINVAL;
7100                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7101                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7102                 /* need to include at least Auth Transaction and Status Code */
7103                 if (sae_data_len < 4)
7104                         return -EINVAL;
7105         }
7106
7107         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7108
7109         /*
7110          * Since we no longer track auth state, ignore
7111          * requests to only change local state.
7112          */
7113         if (local_state_change)
7114                 return 0;
7115
7116         wdev_lock(dev->ieee80211_ptr);
7117         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7118                                  ssid, ssid_len, ie, ie_len,
7119                                  key.p.key, key.p.key_len, key.idx,
7120                                  sae_data, sae_data_len);
7121         wdev_unlock(dev->ieee80211_ptr);
7122         return err;
7123 }
7124
7125 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7126                                    struct genl_info *info,
7127                                    struct cfg80211_crypto_settings *settings,
7128                                    int cipher_limit)
7129 {
7130         memset(settings, 0, sizeof(*settings));
7131
7132         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7133
7134         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7135                 u16 proto;
7136                 proto = nla_get_u16(
7137                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7138                 settings->control_port_ethertype = cpu_to_be16(proto);
7139                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7140                     proto != ETH_P_PAE)
7141                         return -EINVAL;
7142                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7143                         settings->control_port_no_encrypt = true;
7144         } else
7145                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7146
7147         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7148                 void *data;
7149                 int len, i;
7150
7151                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7152                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7153                 settings->n_ciphers_pairwise = len / sizeof(u32);
7154
7155                 if (len % sizeof(u32))
7156                         return -EINVAL;
7157
7158                 if (settings->n_ciphers_pairwise > cipher_limit)
7159                         return -EINVAL;
7160
7161                 memcpy(settings->ciphers_pairwise, data, len);
7162
7163                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7164                         if (!cfg80211_supported_cipher_suite(
7165                                         &rdev->wiphy,
7166                                         settings->ciphers_pairwise[i]))
7167                                 return -EINVAL;
7168         }
7169
7170         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7171                 settings->cipher_group =
7172                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7173                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7174                                                      settings->cipher_group))
7175                         return -EINVAL;
7176         }
7177
7178         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7179                 settings->wpa_versions =
7180                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7181                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7182                         return -EINVAL;
7183         }
7184
7185         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7186                 void *data;
7187                 int len;
7188
7189                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7190                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7191                 settings->n_akm_suites = len / sizeof(u32);
7192
7193                 if (len % sizeof(u32))
7194                         return -EINVAL;
7195
7196                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7197                         return -EINVAL;
7198
7199                 memcpy(settings->akm_suites, data, len);
7200         }
7201
7202         return 0;
7203 }
7204
7205 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7206 {
7207         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7208         struct net_device *dev = info->user_ptr[1];
7209         struct ieee80211_channel *chan;
7210         struct cfg80211_assoc_request req = {};
7211         const u8 *bssid, *ssid;
7212         int err, ssid_len = 0;
7213
7214         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7215                 return -EINVAL;
7216
7217         if (!info->attrs[NL80211_ATTR_MAC] ||
7218             !info->attrs[NL80211_ATTR_SSID] ||
7219             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7220                 return -EINVAL;
7221
7222         if (!rdev->ops->assoc)
7223                 return -EOPNOTSUPP;
7224
7225         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7226             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7227                 return -EOPNOTSUPP;
7228
7229         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7230
7231         chan = nl80211_get_valid_chan(&rdev->wiphy,
7232                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7233         if (!chan)
7234                 return -EINVAL;
7235
7236         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7237         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7238
7239         if (info->attrs[NL80211_ATTR_IE]) {
7240                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7241                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7242         }
7243
7244         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7245                 enum nl80211_mfp mfp =
7246                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7247                 if (mfp == NL80211_MFP_REQUIRED)
7248                         req.use_mfp = true;
7249                 else if (mfp != NL80211_MFP_NO)
7250                         return -EINVAL;
7251         }
7252
7253         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7254                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7255
7256         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7257                 req.flags |= ASSOC_REQ_DISABLE_HT;
7258
7259         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7260                 memcpy(&req.ht_capa_mask,
7261                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7262                        sizeof(req.ht_capa_mask));
7263
7264         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7265                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7266                         return -EINVAL;
7267                 memcpy(&req.ht_capa,
7268                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7269                        sizeof(req.ht_capa));
7270         }
7271
7272         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7273                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7274
7275         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7276                 memcpy(&req.vht_capa_mask,
7277                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7278                        sizeof(req.vht_capa_mask));
7279
7280         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7281                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7282                         return -EINVAL;
7283                 memcpy(&req.vht_capa,
7284                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7285                        sizeof(req.vht_capa));
7286         }
7287
7288         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7289                 if (!((rdev->wiphy.features &
7290                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7291                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7292                     !wiphy_ext_feature_isset(&rdev->wiphy,
7293                                              NL80211_EXT_FEATURE_RRM))
7294                         return -EINVAL;
7295                 req.flags |= ASSOC_REQ_USE_RRM;
7296         }
7297
7298         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7299         if (!err) {
7300                 wdev_lock(dev->ieee80211_ptr);
7301                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7302                                           ssid, ssid_len, &req);
7303                 wdev_unlock(dev->ieee80211_ptr);
7304         }
7305
7306         return err;
7307 }
7308
7309 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7310 {
7311         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7312         struct net_device *dev = info->user_ptr[1];
7313         const u8 *ie = NULL, *bssid;
7314         int ie_len = 0, err;
7315         u16 reason_code;
7316         bool local_state_change;
7317
7318         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7319                 return -EINVAL;
7320
7321         if (!info->attrs[NL80211_ATTR_MAC])
7322                 return -EINVAL;
7323
7324         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7325                 return -EINVAL;
7326
7327         if (!rdev->ops->deauth)
7328                 return -EOPNOTSUPP;
7329
7330         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7331             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7332                 return -EOPNOTSUPP;
7333
7334         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7335
7336         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7337         if (reason_code == 0) {
7338                 /* Reason Code 0 is reserved */
7339                 return -EINVAL;
7340         }
7341
7342         if (info->attrs[NL80211_ATTR_IE]) {
7343                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7344                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7345         }
7346
7347         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7348
7349         wdev_lock(dev->ieee80211_ptr);
7350         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7351                                    local_state_change);
7352         wdev_unlock(dev->ieee80211_ptr);
7353         return err;
7354 }
7355
7356 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7357 {
7358         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7359         struct net_device *dev = info->user_ptr[1];
7360         const u8 *ie = NULL, *bssid;
7361         int ie_len = 0, err;
7362         u16 reason_code;
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_REASON_CODE])
7372                 return -EINVAL;
7373
7374         if (!rdev->ops->disassoc)
7375                 return -EOPNOTSUPP;
7376
7377         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7378             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7379                 return -EOPNOTSUPP;
7380
7381         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7382
7383         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7384         if (reason_code == 0) {
7385                 /* Reason Code 0 is reserved */
7386                 return -EINVAL;
7387         }
7388
7389         if (info->attrs[NL80211_ATTR_IE]) {
7390                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7391                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7392         }
7393
7394         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7395
7396         wdev_lock(dev->ieee80211_ptr);
7397         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7398                                      local_state_change);
7399         wdev_unlock(dev->ieee80211_ptr);
7400         return err;
7401 }
7402
7403 static bool
7404 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7405                          int mcast_rate[IEEE80211_NUM_BANDS],
7406                          int rateval)
7407 {
7408         struct wiphy *wiphy = &rdev->wiphy;
7409         bool found = false;
7410         int band, i;
7411
7412         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7413                 struct ieee80211_supported_band *sband;
7414
7415                 sband = wiphy->bands[band];
7416                 if (!sband)
7417                         continue;
7418
7419                 for (i = 0; i < sband->n_bitrates; i++) {
7420                         if (sband->bitrates[i].bitrate == rateval) {
7421                                 mcast_rate[band] = i + 1;
7422                                 found = true;
7423                                 break;
7424                         }
7425                 }
7426         }
7427
7428         return found;
7429 }
7430
7431 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7432 {
7433         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7434         struct net_device *dev = info->user_ptr[1];
7435         struct cfg80211_ibss_params ibss;
7436         struct wiphy *wiphy;
7437         struct cfg80211_cached_keys *connkeys = NULL;
7438         int err;
7439
7440         memset(&ibss, 0, sizeof(ibss));
7441
7442         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7443                 return -EINVAL;
7444
7445         if (!info->attrs[NL80211_ATTR_SSID] ||
7446             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7447                 return -EINVAL;
7448
7449         ibss.beacon_interval = 100;
7450
7451         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7452                 ibss.beacon_interval =
7453                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7454                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7455                         return -EINVAL;
7456         }
7457
7458         if (!rdev->ops->join_ibss)
7459                 return -EOPNOTSUPP;
7460
7461         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7462                 return -EOPNOTSUPP;
7463
7464         wiphy = &rdev->wiphy;
7465
7466         if (info->attrs[NL80211_ATTR_MAC]) {
7467                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7468
7469                 if (!is_valid_ether_addr(ibss.bssid))
7470                         return -EINVAL;
7471         }
7472         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7473         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7474
7475         if (info->attrs[NL80211_ATTR_IE]) {
7476                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7477                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7478         }
7479
7480         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7481         if (err)
7482                 return err;
7483
7484         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7485                                      NL80211_IFTYPE_ADHOC))
7486                 return -EINVAL;
7487
7488         switch (ibss.chandef.width) {
7489         case NL80211_CHAN_WIDTH_5:
7490         case NL80211_CHAN_WIDTH_10:
7491         case NL80211_CHAN_WIDTH_20_NOHT:
7492                 break;
7493         case NL80211_CHAN_WIDTH_20:
7494         case NL80211_CHAN_WIDTH_40:
7495                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7496                         return -EINVAL;
7497                 break;
7498         case NL80211_CHAN_WIDTH_80:
7499         case NL80211_CHAN_WIDTH_80P80:
7500         case NL80211_CHAN_WIDTH_160:
7501                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7502                         return -EINVAL;
7503                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7504                                              NL80211_EXT_FEATURE_VHT_IBSS))
7505                         return -EINVAL;
7506                 break;
7507         default:
7508                 return -EINVAL;
7509         }
7510
7511         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7512         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7513
7514         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7515                 u8 *rates =
7516                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7517                 int n_rates =
7518                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7519                 struct ieee80211_supported_band *sband =
7520                         wiphy->bands[ibss.chandef.chan->band];
7521
7522                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7523                                              &ibss.basic_rates);
7524                 if (err)
7525                         return err;
7526         }
7527
7528         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7529                 memcpy(&ibss.ht_capa_mask,
7530                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7531                        sizeof(ibss.ht_capa_mask));
7532
7533         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7534                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7535                         return -EINVAL;
7536                 memcpy(&ibss.ht_capa,
7537                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7538                        sizeof(ibss.ht_capa));
7539         }
7540
7541         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7542             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7543                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7544                 return -EINVAL;
7545
7546         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7547                 bool no_ht = false;
7548
7549                 connkeys = nl80211_parse_connkeys(rdev,
7550                                           info->attrs[NL80211_ATTR_KEYS],
7551                                           &no_ht);
7552                 if (IS_ERR(connkeys))
7553                         return PTR_ERR(connkeys);
7554
7555                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7556                     no_ht) {
7557                         kzfree(connkeys);
7558                         return -EINVAL;
7559                 }
7560         }
7561
7562         ibss.control_port =
7563                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7564
7565         ibss.userspace_handles_dfs =
7566                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7567
7568         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7569         if (err)
7570                 kzfree(connkeys);
7571         return err;
7572 }
7573
7574 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7575 {
7576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7577         struct net_device *dev = info->user_ptr[1];
7578
7579         if (!rdev->ops->leave_ibss)
7580                 return -EOPNOTSUPP;
7581
7582         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7583                 return -EOPNOTSUPP;
7584
7585         return cfg80211_leave_ibss(rdev, dev, false);
7586 }
7587
7588 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7589 {
7590         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7591         struct net_device *dev = info->user_ptr[1];
7592         int mcast_rate[IEEE80211_NUM_BANDS];
7593         u32 nla_rate;
7594         int err;
7595
7596         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7597             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7598             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7599                 return -EOPNOTSUPP;
7600
7601         if (!rdev->ops->set_mcast_rate)
7602                 return -EOPNOTSUPP;
7603
7604         memset(mcast_rate, 0, sizeof(mcast_rate));
7605
7606         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7607                 return -EINVAL;
7608
7609         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7610         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7611                 return -EINVAL;
7612
7613         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7614
7615         return err;
7616 }
7617
7618 static struct sk_buff *
7619 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7620                             struct wireless_dev *wdev, int approxlen,
7621                             u32 portid, u32 seq, enum nl80211_commands cmd,
7622                             enum nl80211_attrs attr,
7623                             const struct nl80211_vendor_cmd_info *info,
7624                             gfp_t gfp)
7625 {
7626         struct sk_buff *skb;
7627         void *hdr;
7628         struct nlattr *data;
7629
7630         skb = nlmsg_new(approxlen + 100, gfp);
7631         if (!skb)
7632                 return NULL;
7633
7634         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7635         if (!hdr) {
7636                 kfree_skb(skb);
7637                 return NULL;
7638         }
7639
7640         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7641                 goto nla_put_failure;
7642
7643         if (info) {
7644                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7645                                 info->vendor_id))
7646                         goto nla_put_failure;
7647                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7648                                 info->subcmd))
7649                         goto nla_put_failure;
7650         }
7651
7652         if (wdev) {
7653                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7654                                 wdev_id(wdev)))
7655                         goto nla_put_failure;
7656                 if (wdev->netdev &&
7657                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7658                                 wdev->netdev->ifindex))
7659                         goto nla_put_failure;
7660         }
7661
7662         data = nla_nest_start(skb, attr);
7663
7664         ((void **)skb->cb)[0] = rdev;
7665         ((void **)skb->cb)[1] = hdr;
7666         ((void **)skb->cb)[2] = data;
7667
7668         return skb;
7669
7670  nla_put_failure:
7671         kfree_skb(skb);
7672         return NULL;
7673 }
7674
7675 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7676                                            struct wireless_dev *wdev,
7677                                            enum nl80211_commands cmd,
7678                                            enum nl80211_attrs attr,
7679                                            int vendor_event_idx,
7680                                            int approxlen, gfp_t gfp)
7681 {
7682         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7683         const struct nl80211_vendor_cmd_info *info;
7684
7685         switch (cmd) {
7686         case NL80211_CMD_TESTMODE:
7687                 if (WARN_ON(vendor_event_idx != -1))
7688                         return NULL;
7689                 info = NULL;
7690                 break;
7691         case NL80211_CMD_VENDOR:
7692                 if (WARN_ON(vendor_event_idx < 0 ||
7693                             vendor_event_idx >= wiphy->n_vendor_events))
7694                         return NULL;
7695                 info = &wiphy->vendor_events[vendor_event_idx];
7696                 break;
7697         default:
7698                 WARN_ON(1);
7699                 return NULL;
7700         }
7701
7702         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7703                                            cmd, attr, info, gfp);
7704 }
7705 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7706
7707 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7708 {
7709         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7710         void *hdr = ((void **)skb->cb)[1];
7711         struct nlattr *data = ((void **)skb->cb)[2];
7712         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7713
7714         /* clear CB data for netlink core to own from now on */
7715         memset(skb->cb, 0, sizeof(skb->cb));
7716
7717         nla_nest_end(skb, data);
7718         genlmsg_end(skb, hdr);
7719
7720         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7721                 mcgrp = NL80211_MCGRP_VENDOR;
7722
7723         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7724                                 mcgrp, gfp);
7725 }
7726 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7727
7728 #ifdef CONFIG_NL80211_TESTMODE
7729 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7730 {
7731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7732         struct wireless_dev *wdev =
7733                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7734         int err;
7735
7736         if (!rdev->ops->testmode_cmd)
7737                 return -EOPNOTSUPP;
7738
7739         if (IS_ERR(wdev)) {
7740                 err = PTR_ERR(wdev);
7741                 if (err != -EINVAL)
7742                         return err;
7743                 wdev = NULL;
7744         } else if (wdev->wiphy != &rdev->wiphy) {
7745                 return -EINVAL;
7746         }
7747
7748         if (!info->attrs[NL80211_ATTR_TESTDATA])
7749                 return -EINVAL;
7750
7751         rdev->cur_cmd_info = info;
7752         err = rdev_testmode_cmd(rdev, wdev,
7753                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7754                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7755         rdev->cur_cmd_info = NULL;
7756
7757         return err;
7758 }
7759
7760 static int nl80211_testmode_dump(struct sk_buff *skb,
7761                                  struct netlink_callback *cb)
7762 {
7763         struct cfg80211_registered_device *rdev;
7764         int err;
7765         long phy_idx;
7766         void *data = NULL;
7767         int data_len = 0;
7768
7769         rtnl_lock();
7770
7771         if (cb->args[0]) {
7772                 /*
7773                  * 0 is a valid index, but not valid for args[0],
7774                  * so we need to offset by 1.
7775                  */
7776                 phy_idx = cb->args[0] - 1;
7777         } else {
7778                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7779                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7780                                   nl80211_policy);
7781                 if (err)
7782                         goto out_err;
7783
7784                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7785                                                   nl80211_fam.attrbuf);
7786                 if (IS_ERR(rdev)) {
7787                         err = PTR_ERR(rdev);
7788                         goto out_err;
7789                 }
7790                 phy_idx = rdev->wiphy_idx;
7791                 rdev = NULL;
7792
7793                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7794                         cb->args[1] =
7795                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7796         }
7797
7798         if (cb->args[1]) {
7799                 data = nla_data((void *)cb->args[1]);
7800                 data_len = nla_len((void *)cb->args[1]);
7801         }
7802
7803         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7804         if (!rdev) {
7805                 err = -ENOENT;
7806                 goto out_err;
7807         }
7808
7809         if (!rdev->ops->testmode_dump) {
7810                 err = -EOPNOTSUPP;
7811                 goto out_err;
7812         }
7813
7814         while (1) {
7815                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7816                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7817                                            NL80211_CMD_TESTMODE);
7818                 struct nlattr *tmdata;
7819
7820                 if (!hdr)
7821                         break;
7822
7823                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7824                         genlmsg_cancel(skb, hdr);
7825                         break;
7826                 }
7827
7828                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7829                 if (!tmdata) {
7830                         genlmsg_cancel(skb, hdr);
7831                         break;
7832                 }
7833                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7834                 nla_nest_end(skb, tmdata);
7835
7836                 if (err == -ENOBUFS || err == -ENOENT) {
7837                         genlmsg_cancel(skb, hdr);
7838                         break;
7839                 } else if (err) {
7840                         genlmsg_cancel(skb, hdr);
7841                         goto out_err;
7842                 }
7843
7844                 genlmsg_end(skb, hdr);
7845         }
7846
7847         err = skb->len;
7848         /* see above */
7849         cb->args[0] = phy_idx + 1;
7850  out_err:
7851         rtnl_unlock();
7852         return err;
7853 }
7854 #endif
7855
7856 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7857 {
7858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7859         struct net_device *dev = info->user_ptr[1];
7860         struct cfg80211_connect_params connect;
7861         struct wiphy *wiphy;
7862         struct cfg80211_cached_keys *connkeys = NULL;
7863         int err;
7864
7865         memset(&connect, 0, sizeof(connect));
7866
7867         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7868                 return -EINVAL;
7869
7870         if (!info->attrs[NL80211_ATTR_SSID] ||
7871             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7872                 return -EINVAL;
7873
7874         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7875                 connect.auth_type =
7876                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7877                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7878                                              NL80211_CMD_CONNECT))
7879                         return -EINVAL;
7880         } else
7881                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7882
7883         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7884
7885         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7886                                       NL80211_MAX_NR_CIPHER_SUITES);
7887         if (err)
7888                 return err;
7889
7890         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7891             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7892                 return -EOPNOTSUPP;
7893
7894         wiphy = &rdev->wiphy;
7895
7896         connect.bg_scan_period = -1;
7897         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7898                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7899                 connect.bg_scan_period =
7900                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7901         }
7902
7903         if (info->attrs[NL80211_ATTR_MAC])
7904                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7905         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7906                 connect.bssid_hint =
7907                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7908         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7909         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7910
7911         if (info->attrs[NL80211_ATTR_IE]) {
7912                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7913                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7914         }
7915
7916         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7917                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7918                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7919                     connect.mfp != NL80211_MFP_NO)
7920                         return -EINVAL;
7921         } else {
7922                 connect.mfp = NL80211_MFP_NO;
7923         }
7924
7925         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7926                 connect.channel = nl80211_get_valid_chan(
7927                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7928                 if (!connect.channel)
7929                         return -EINVAL;
7930         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7931                 connect.channel_hint = nl80211_get_valid_chan(
7932                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7933                 if (!connect.channel_hint)
7934                         return -EINVAL;
7935         }
7936
7937         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7938                 connkeys = nl80211_parse_connkeys(rdev,
7939                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7940                 if (IS_ERR(connkeys))
7941                         return PTR_ERR(connkeys);
7942         }
7943
7944         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7945                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7946
7947         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7948                 memcpy(&connect.ht_capa_mask,
7949                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7950                        sizeof(connect.ht_capa_mask));
7951
7952         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7953                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7954                         kzfree(connkeys);
7955                         return -EINVAL;
7956                 }
7957                 memcpy(&connect.ht_capa,
7958                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7959                        sizeof(connect.ht_capa));
7960         }
7961
7962         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7963                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7964
7965         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7966                 memcpy(&connect.vht_capa_mask,
7967                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7968                        sizeof(connect.vht_capa_mask));
7969
7970         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7971                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7972                         kzfree(connkeys);
7973                         return -EINVAL;
7974                 }
7975                 memcpy(&connect.vht_capa,
7976                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7977                        sizeof(connect.vht_capa));
7978         }
7979
7980         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7981                 if (!((rdev->wiphy.features &
7982                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7983                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7984                     !wiphy_ext_feature_isset(&rdev->wiphy,
7985                                              NL80211_EXT_FEATURE_RRM)) {
7986                         kzfree(connkeys);
7987                         return -EINVAL;
7988                 }
7989                 connect.flags |= ASSOC_REQ_USE_RRM;
7990         }
7991
7992         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
7993         if (connect.pbss && !rdev->wiphy.bands[IEEE80211_BAND_60GHZ]) {
7994                 kzfree(connkeys);
7995                 return -EOPNOTSUPP;
7996         }
7997
7998         wdev_lock(dev->ieee80211_ptr);
7999         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
8000         wdev_unlock(dev->ieee80211_ptr);
8001         if (err)
8002                 kzfree(connkeys);
8003         return err;
8004 }
8005
8006 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8007 {
8008         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8009         struct net_device *dev = info->user_ptr[1];
8010         u16 reason;
8011         int ret;
8012
8013         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8014                 reason = WLAN_REASON_DEAUTH_LEAVING;
8015         else
8016                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8017
8018         if (reason == 0)
8019                 return -EINVAL;
8020
8021         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8022             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8023                 return -EOPNOTSUPP;
8024
8025         wdev_lock(dev->ieee80211_ptr);
8026         ret = cfg80211_disconnect(rdev, dev, reason, true);
8027         wdev_unlock(dev->ieee80211_ptr);
8028         return ret;
8029 }
8030
8031 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8032 {
8033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8034         struct net *net;
8035         int err;
8036
8037         if (info->attrs[NL80211_ATTR_PID]) {
8038                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8039
8040                 net = get_net_ns_by_pid(pid);
8041         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8042                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8043
8044                 net = get_net_ns_by_fd(fd);
8045         } else {
8046                 return -EINVAL;
8047         }
8048
8049         if (IS_ERR(net))
8050                 return PTR_ERR(net);
8051
8052         err = 0;
8053
8054         /* check if anything to do */
8055         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8056                 err = cfg80211_switch_netns(rdev, net);
8057
8058         put_net(net);
8059         return err;
8060 }
8061
8062 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8063 {
8064         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8065         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8066                         struct cfg80211_pmksa *pmksa) = NULL;
8067         struct net_device *dev = info->user_ptr[1];
8068         struct cfg80211_pmksa pmksa;
8069
8070         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8071
8072         if (!info->attrs[NL80211_ATTR_MAC])
8073                 return -EINVAL;
8074
8075         if (!info->attrs[NL80211_ATTR_PMKID])
8076                 return -EINVAL;
8077
8078         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8079         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8080
8081         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8082             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8083                 return -EOPNOTSUPP;
8084
8085         switch (info->genlhdr->cmd) {
8086         case NL80211_CMD_SET_PMKSA:
8087                 rdev_ops = rdev->ops->set_pmksa;
8088                 break;
8089         case NL80211_CMD_DEL_PMKSA:
8090                 rdev_ops = rdev->ops->del_pmksa;
8091                 break;
8092         default:
8093                 WARN_ON(1);
8094                 break;
8095         }
8096
8097         if (!rdev_ops)
8098                 return -EOPNOTSUPP;
8099
8100         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8101 }
8102
8103 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8104 {
8105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8106         struct net_device *dev = info->user_ptr[1];
8107
8108         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8109             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8110                 return -EOPNOTSUPP;
8111
8112         if (!rdev->ops->flush_pmksa)
8113                 return -EOPNOTSUPP;
8114
8115         return rdev_flush_pmksa(rdev, dev);
8116 }
8117
8118 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8119 {
8120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8121         struct net_device *dev = info->user_ptr[1];
8122         u8 action_code, dialog_token;
8123         u32 peer_capability = 0;
8124         u16 status_code;
8125         u8 *peer;
8126         bool initiator;
8127
8128         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8129             !rdev->ops->tdls_mgmt)
8130                 return -EOPNOTSUPP;
8131
8132         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8133             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8134             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8135             !info->attrs[NL80211_ATTR_IE] ||
8136             !info->attrs[NL80211_ATTR_MAC])
8137                 return -EINVAL;
8138
8139         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8140         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8141         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8142         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8143         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8144         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8145                 peer_capability =
8146                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8147
8148         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8149                               dialog_token, status_code, peer_capability,
8150                               initiator,
8151                               nla_data(info->attrs[NL80211_ATTR_IE]),
8152                               nla_len(info->attrs[NL80211_ATTR_IE]));
8153 }
8154
8155 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8156 {
8157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8158         struct net_device *dev = info->user_ptr[1];
8159         enum nl80211_tdls_operation operation;
8160         u8 *peer;
8161
8162         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8163             !rdev->ops->tdls_oper)
8164                 return -EOPNOTSUPP;
8165
8166         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8167             !info->attrs[NL80211_ATTR_MAC])
8168                 return -EINVAL;
8169
8170         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8171         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8172
8173         return rdev_tdls_oper(rdev, dev, peer, operation);
8174 }
8175
8176 static int nl80211_remain_on_channel(struct sk_buff *skb,
8177                                      struct genl_info *info)
8178 {
8179         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8180         struct wireless_dev *wdev = info->user_ptr[1];
8181         struct cfg80211_chan_def chandef;
8182         struct sk_buff *msg;
8183         void *hdr;
8184         u64 cookie;
8185         u32 duration;
8186         int err;
8187
8188         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8189             !info->attrs[NL80211_ATTR_DURATION])
8190                 return -EINVAL;
8191
8192         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8193
8194         if (!rdev->ops->remain_on_channel ||
8195             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8196                 return -EOPNOTSUPP;
8197
8198         /*
8199          * We should be on that channel for at least a minimum amount of
8200          * time (10ms) but no longer than the driver supports.
8201          */
8202         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8203             duration > rdev->wiphy.max_remain_on_channel_duration)
8204                 return -EINVAL;
8205
8206         err = nl80211_parse_chandef(rdev, info, &chandef);
8207         if (err)
8208                 return err;
8209
8210         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8211         if (!msg)
8212                 return -ENOMEM;
8213
8214         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8215                              NL80211_CMD_REMAIN_ON_CHANNEL);
8216         if (!hdr) {
8217                 err = -ENOBUFS;
8218                 goto free_msg;
8219         }
8220
8221         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8222                                      duration, &cookie);
8223
8224         if (err)
8225                 goto free_msg;
8226
8227         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8228                 goto nla_put_failure;
8229
8230         genlmsg_end(msg, hdr);
8231
8232         return genlmsg_reply(msg, info);
8233
8234  nla_put_failure:
8235         err = -ENOBUFS;
8236  free_msg:
8237         nlmsg_free(msg);
8238         return err;
8239 }
8240
8241 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8242                                             struct genl_info *info)
8243 {
8244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8245         struct wireless_dev *wdev = info->user_ptr[1];
8246         u64 cookie;
8247
8248         if (!info->attrs[NL80211_ATTR_COOKIE])
8249                 return -EINVAL;
8250
8251         if (!rdev->ops->cancel_remain_on_channel)
8252                 return -EOPNOTSUPP;
8253
8254         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8255
8256         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8257 }
8258
8259 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8260                            u8 *rates, u8 rates_len)
8261 {
8262         u8 i;
8263         u32 mask = 0;
8264
8265         for (i = 0; i < rates_len; i++) {
8266                 int rate = (rates[i] & 0x7f) * 5;
8267                 int ridx;
8268                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8269                         struct ieee80211_rate *srate =
8270                                 &sband->bitrates[ridx];
8271                         if (rate == srate->bitrate) {
8272                                 mask |= 1 << ridx;
8273                                 break;
8274                         }
8275                 }
8276                 if (ridx == sband->n_bitrates)
8277                         return 0; /* rate not found */
8278         }
8279
8280         return mask;
8281 }
8282
8283 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8284                                u8 *rates, u8 rates_len,
8285                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8286 {
8287         u8 i;
8288
8289         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8290
8291         for (i = 0; i < rates_len; i++) {
8292                 int ridx, rbit;
8293
8294                 ridx = rates[i] / 8;
8295                 rbit = BIT(rates[i] % 8);
8296
8297                 /* check validity */
8298                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8299                         return false;
8300
8301                 /* check availability */
8302                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8303                         mcs[ridx] |= rbit;
8304                 else
8305                         return false;
8306         }
8307
8308         return true;
8309 }
8310
8311 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8312 {
8313         u16 mcs_mask = 0;
8314
8315         switch (vht_mcs_map) {
8316         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8317                 break;
8318         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8319                 mcs_mask = 0x00FF;
8320                 break;
8321         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8322                 mcs_mask = 0x01FF;
8323                 break;
8324         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8325                 mcs_mask = 0x03FF;
8326                 break;
8327         default:
8328                 break;
8329         }
8330
8331         return mcs_mask;
8332 }
8333
8334 static void vht_build_mcs_mask(u16 vht_mcs_map,
8335                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8336 {
8337         u8 nss;
8338
8339         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8340                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8341                 vht_mcs_map >>= 2;
8342         }
8343 }
8344
8345 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8346                              struct nl80211_txrate_vht *txrate,
8347                              u16 mcs[NL80211_VHT_NSS_MAX])
8348 {
8349         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8350         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8351         u8 i;
8352
8353         if (!sband->vht_cap.vht_supported)
8354                 return false;
8355
8356         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8357
8358         /* Build vht_mcs_mask from VHT capabilities */
8359         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8360
8361         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8362                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8363                         mcs[i] = txrate->mcs[i];
8364                 else
8365                         return false;
8366         }
8367
8368         return true;
8369 }
8370
8371 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8372         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8373                                     .len = NL80211_MAX_SUPP_RATES },
8374         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8375                                 .len = NL80211_MAX_SUPP_HT_RATES },
8376         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8377         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8378 };
8379
8380 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8381                                        struct genl_info *info)
8382 {
8383         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8384         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8385         struct cfg80211_bitrate_mask mask;
8386         int rem, i;
8387         struct net_device *dev = info->user_ptr[1];
8388         struct nlattr *tx_rates;
8389         struct ieee80211_supported_band *sband;
8390         u16 vht_tx_mcs_map;
8391
8392         if (!rdev->ops->set_bitrate_mask)
8393                 return -EOPNOTSUPP;
8394
8395         memset(&mask, 0, sizeof(mask));
8396         /* Default to all rates enabled */
8397         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8398                 sband = rdev->wiphy.bands[i];
8399
8400                 if (!sband)
8401                         continue;
8402
8403                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8404                 memcpy(mask.control[i].ht_mcs,
8405                        sband->ht_cap.mcs.rx_mask,
8406                        sizeof(mask.control[i].ht_mcs));
8407
8408                 if (!sband->vht_cap.vht_supported)
8409                         continue;
8410
8411                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8412                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8413         }
8414
8415         /* if no rates are given set it back to the defaults */
8416         if (!info->attrs[NL80211_ATTR_TX_RATES])
8417                 goto out;
8418
8419         /*
8420          * The nested attribute uses enum nl80211_band as the index. This maps
8421          * directly to the enum ieee80211_band values used in cfg80211.
8422          */
8423         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8424         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8425                 enum ieee80211_band band = nla_type(tx_rates);
8426                 int err;
8427
8428                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8429                         return -EINVAL;
8430                 sband = rdev->wiphy.bands[band];
8431                 if (sband == NULL)
8432                         return -EINVAL;
8433                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8434                                 nla_len(tx_rates), nl80211_txattr_policy);
8435                 if (err)
8436                         return err;
8437                 if (tb[NL80211_TXRATE_LEGACY]) {
8438                         mask.control[band].legacy = rateset_to_mask(
8439                                 sband,
8440                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8441                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8442                         if ((mask.control[band].legacy == 0) &&
8443                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8444                                 return -EINVAL;
8445                 }
8446                 if (tb[NL80211_TXRATE_HT]) {
8447                         if (!ht_rateset_to_mask(
8448                                         sband,
8449                                         nla_data(tb[NL80211_TXRATE_HT]),
8450                                         nla_len(tb[NL80211_TXRATE_HT]),
8451                                         mask.control[band].ht_mcs))
8452                                 return -EINVAL;
8453                 }
8454                 if (tb[NL80211_TXRATE_VHT]) {
8455                         if (!vht_set_mcs_mask(
8456                                         sband,
8457                                         nla_data(tb[NL80211_TXRATE_VHT]),
8458                                         mask.control[band].vht_mcs))
8459                                 return -EINVAL;
8460                 }
8461                 if (tb[NL80211_TXRATE_GI]) {
8462                         mask.control[band].gi =
8463                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8464                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8465                                 return -EINVAL;
8466                 }
8467
8468                 if (mask.control[band].legacy == 0) {
8469                         /* don't allow empty legacy rates if HT or VHT
8470                          * are not even supported.
8471                          */
8472                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8473                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8474                                 return -EINVAL;
8475
8476                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8477                                 if (mask.control[band].ht_mcs[i])
8478                                         goto out;
8479
8480                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8481                                 if (mask.control[band].vht_mcs[i])
8482                                         goto out;
8483
8484                         /* legacy and mcs rates may not be both empty */
8485                         return -EINVAL;
8486                 }
8487         }
8488
8489 out:
8490         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8491 }
8492
8493 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8494 {
8495         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8496         struct wireless_dev *wdev = info->user_ptr[1];
8497         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8498
8499         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8500                 return -EINVAL;
8501
8502         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8503                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8504
8505         switch (wdev->iftype) {
8506         case NL80211_IFTYPE_STATION:
8507         case NL80211_IFTYPE_ADHOC:
8508         case NL80211_IFTYPE_P2P_CLIENT:
8509         case NL80211_IFTYPE_AP:
8510         case NL80211_IFTYPE_AP_VLAN:
8511         case NL80211_IFTYPE_MESH_POINT:
8512         case NL80211_IFTYPE_P2P_GO:
8513         case NL80211_IFTYPE_P2P_DEVICE:
8514                 break;
8515         default:
8516                 return -EOPNOTSUPP;
8517         }
8518
8519         /* not much point in registering if we can't reply */
8520         if (!rdev->ops->mgmt_tx)
8521                 return -EOPNOTSUPP;
8522
8523         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8524                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8525                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8526 }
8527
8528 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8529 {
8530         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8531         struct wireless_dev *wdev = info->user_ptr[1];
8532         struct cfg80211_chan_def chandef;
8533         int err;
8534         void *hdr = NULL;
8535         u64 cookie;
8536         struct sk_buff *msg = NULL;
8537         struct cfg80211_mgmt_tx_params params = {
8538                 .dont_wait_for_ack =
8539                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8540         };
8541
8542         if (!info->attrs[NL80211_ATTR_FRAME])
8543                 return -EINVAL;
8544
8545         if (!rdev->ops->mgmt_tx)
8546                 return -EOPNOTSUPP;
8547
8548         switch (wdev->iftype) {
8549         case NL80211_IFTYPE_P2P_DEVICE:
8550                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8551                         return -EINVAL;
8552         case NL80211_IFTYPE_STATION:
8553         case NL80211_IFTYPE_ADHOC:
8554         case NL80211_IFTYPE_P2P_CLIENT:
8555         case NL80211_IFTYPE_AP:
8556         case NL80211_IFTYPE_AP_VLAN:
8557         case NL80211_IFTYPE_MESH_POINT:
8558         case NL80211_IFTYPE_P2P_GO:
8559                 break;
8560         default:
8561                 return -EOPNOTSUPP;
8562         }
8563
8564         if (info->attrs[NL80211_ATTR_DURATION]) {
8565                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8566                         return -EINVAL;
8567                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8568
8569                 /*
8570                  * We should wait on the channel for at least a minimum amount
8571                  * of time (10ms) but no longer than the driver supports.
8572                  */
8573                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8574                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8575                         return -EINVAL;
8576
8577         }
8578
8579         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8580
8581         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8582                 return -EINVAL;
8583
8584         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8585
8586         /* get the channel if any has been specified, otherwise pass NULL to
8587          * the driver. The latter will use the current one
8588          */
8589         chandef.chan = NULL;
8590         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8591                 err = nl80211_parse_chandef(rdev, info, &chandef);
8592                 if (err)
8593                         return err;
8594         }
8595
8596         if (!chandef.chan && params.offchan)
8597                 return -EINVAL;
8598
8599         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8600         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8601
8602         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8603                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8604                 int i;
8605
8606                 if (len % sizeof(u16))
8607                         return -EINVAL;
8608
8609                 params.n_csa_offsets = len / sizeof(u16);
8610                 params.csa_offsets =
8611                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8612
8613                 /* check that all the offsets fit the frame */
8614                 for (i = 0; i < params.n_csa_offsets; i++) {
8615                         if (params.csa_offsets[i] >= params.len)
8616                                 return -EINVAL;
8617                 }
8618         }
8619
8620         if (!params.dont_wait_for_ack) {
8621                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8622                 if (!msg)
8623                         return -ENOMEM;
8624
8625                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8626                                      NL80211_CMD_FRAME);
8627                 if (!hdr) {
8628                         err = -ENOBUFS;
8629                         goto free_msg;
8630                 }
8631         }
8632
8633         params.chan = chandef.chan;
8634         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8635         if (err)
8636                 goto free_msg;
8637
8638         if (msg) {
8639                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8640                         goto nla_put_failure;
8641
8642                 genlmsg_end(msg, hdr);
8643                 return genlmsg_reply(msg, info);
8644         }
8645
8646         return 0;
8647
8648  nla_put_failure:
8649         err = -ENOBUFS;
8650  free_msg:
8651         nlmsg_free(msg);
8652         return err;
8653 }
8654
8655 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8656 {
8657         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8658         struct wireless_dev *wdev = info->user_ptr[1];
8659         u64 cookie;
8660
8661         if (!info->attrs[NL80211_ATTR_COOKIE])
8662                 return -EINVAL;
8663
8664         if (!rdev->ops->mgmt_tx_cancel_wait)
8665                 return -EOPNOTSUPP;
8666
8667         switch (wdev->iftype) {
8668         case NL80211_IFTYPE_STATION:
8669         case NL80211_IFTYPE_ADHOC:
8670         case NL80211_IFTYPE_P2P_CLIENT:
8671         case NL80211_IFTYPE_AP:
8672         case NL80211_IFTYPE_AP_VLAN:
8673         case NL80211_IFTYPE_P2P_GO:
8674         case NL80211_IFTYPE_P2P_DEVICE:
8675                 break;
8676         default:
8677                 return -EOPNOTSUPP;
8678         }
8679
8680         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8681
8682         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8683 }
8684
8685 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8686 {
8687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8688         struct wireless_dev *wdev;
8689         struct net_device *dev = info->user_ptr[1];
8690         u8 ps_state;
8691         bool state;
8692         int err;
8693
8694         if (!info->attrs[NL80211_ATTR_PS_STATE])
8695                 return -EINVAL;
8696
8697         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8698
8699         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8700                 return -EINVAL;
8701
8702         wdev = dev->ieee80211_ptr;
8703
8704         if (!rdev->ops->set_power_mgmt)
8705                 return -EOPNOTSUPP;
8706
8707         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8708
8709         if (state == wdev->ps)
8710                 return 0;
8711
8712         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8713         if (!err)
8714                 wdev->ps = state;
8715         return err;
8716 }
8717
8718 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8719 {
8720         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8721         enum nl80211_ps_state ps_state;
8722         struct wireless_dev *wdev;
8723         struct net_device *dev = info->user_ptr[1];
8724         struct sk_buff *msg;
8725         void *hdr;
8726         int err;
8727
8728         wdev = dev->ieee80211_ptr;
8729
8730         if (!rdev->ops->set_power_mgmt)
8731                 return -EOPNOTSUPP;
8732
8733         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8734         if (!msg)
8735                 return -ENOMEM;
8736
8737         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8738                              NL80211_CMD_GET_POWER_SAVE);
8739         if (!hdr) {
8740                 err = -ENOBUFS;
8741                 goto free_msg;
8742         }
8743
8744         if (wdev->ps)
8745                 ps_state = NL80211_PS_ENABLED;
8746         else
8747                 ps_state = NL80211_PS_DISABLED;
8748
8749         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8750                 goto nla_put_failure;
8751
8752         genlmsg_end(msg, hdr);
8753         return genlmsg_reply(msg, info);
8754
8755  nla_put_failure:
8756         err = -ENOBUFS;
8757  free_msg:
8758         nlmsg_free(msg);
8759         return err;
8760 }
8761
8762 static const struct nla_policy
8763 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8764         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8765         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8766         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8767         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8768         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8769         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8770 };
8771
8772 static int nl80211_set_cqm_txe(struct genl_info *info,
8773                                u32 rate, u32 pkts, u32 intvl)
8774 {
8775         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8776         struct net_device *dev = info->user_ptr[1];
8777         struct wireless_dev *wdev = dev->ieee80211_ptr;
8778
8779         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8780                 return -EINVAL;
8781
8782         if (!rdev->ops->set_cqm_txe_config)
8783                 return -EOPNOTSUPP;
8784
8785         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8786             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8787                 return -EOPNOTSUPP;
8788
8789         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8790 }
8791
8792 static int nl80211_set_cqm_rssi(struct genl_info *info,
8793                                 s32 threshold, u32 hysteresis)
8794 {
8795         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8796         struct net_device *dev = info->user_ptr[1];
8797         struct wireless_dev *wdev = dev->ieee80211_ptr;
8798
8799         if (threshold > 0)
8800                 return -EINVAL;
8801
8802         /* disabling - hysteresis should also be zero then */
8803         if (threshold == 0)
8804                 hysteresis = 0;
8805
8806         if (!rdev->ops->set_cqm_rssi_config)
8807                 return -EOPNOTSUPP;
8808
8809         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8810             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8811                 return -EOPNOTSUPP;
8812
8813         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8814 }
8815
8816 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8817 {
8818         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8819         struct nlattr *cqm;
8820         int err;
8821
8822         cqm = info->attrs[NL80211_ATTR_CQM];
8823         if (!cqm)
8824                 return -EINVAL;
8825
8826         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8827                                nl80211_attr_cqm_policy);
8828         if (err)
8829                 return err;
8830
8831         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8832             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8833                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8834                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8835
8836                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8837         }
8838
8839         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8840             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8841             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8842                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8843                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8844                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8845
8846                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8847         }
8848
8849         return -EINVAL;
8850 }
8851
8852 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8853 {
8854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8855         struct net_device *dev = info->user_ptr[1];
8856         struct ocb_setup setup = {};
8857         int err;
8858
8859         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8860         if (err)
8861                 return err;
8862
8863         return cfg80211_join_ocb(rdev, dev, &setup);
8864 }
8865
8866 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8867 {
8868         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8869         struct net_device *dev = info->user_ptr[1];
8870
8871         return cfg80211_leave_ocb(rdev, dev);
8872 }
8873
8874 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8875 {
8876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8877         struct net_device *dev = info->user_ptr[1];
8878         struct mesh_config cfg;
8879         struct mesh_setup setup;
8880         int err;
8881
8882         /* start with default */
8883         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8884         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8885
8886         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8887                 /* and parse parameters if given */
8888                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8889                 if (err)
8890                         return err;
8891         }
8892
8893         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8894             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8895                 return -EINVAL;
8896
8897         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8898         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8899
8900         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8901             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8902                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8903                         return -EINVAL;
8904
8905         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8906                 setup.beacon_interval =
8907                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8908                 if (setup.beacon_interval < 10 ||
8909                     setup.beacon_interval > 10000)
8910                         return -EINVAL;
8911         }
8912
8913         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8914                 setup.dtim_period =
8915                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8916                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8917                         return -EINVAL;
8918         }
8919
8920         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8921                 /* parse additional setup parameters if given */
8922                 err = nl80211_parse_mesh_setup(info, &setup);
8923                 if (err)
8924                         return err;
8925         }
8926
8927         if (setup.user_mpm)
8928                 cfg.auto_open_plinks = false;
8929
8930         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8931                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8932                 if (err)
8933                         return err;
8934         } else {
8935                 /* cfg80211_join_mesh() will sort it out */
8936                 setup.chandef.chan = NULL;
8937         }
8938
8939         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8940                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8941                 int n_rates =
8942                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8943                 struct ieee80211_supported_band *sband;
8944
8945                 if (!setup.chandef.chan)
8946                         return -EINVAL;
8947
8948                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8949
8950                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8951                                              &setup.basic_rates);
8952                 if (err)
8953                         return err;
8954         }
8955
8956         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8957 }
8958
8959 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8960 {
8961         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8962         struct net_device *dev = info->user_ptr[1];
8963
8964         return cfg80211_leave_mesh(rdev, dev);
8965 }
8966
8967 #ifdef CONFIG_PM
8968 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8969                                         struct cfg80211_registered_device *rdev)
8970 {
8971         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8972         struct nlattr *nl_pats, *nl_pat;
8973         int i, pat_len;
8974
8975         if (!wowlan->n_patterns)
8976                 return 0;
8977
8978         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8979         if (!nl_pats)
8980                 return -ENOBUFS;
8981
8982         for (i = 0; i < wowlan->n_patterns; i++) {
8983                 nl_pat = nla_nest_start(msg, i + 1);
8984                 if (!nl_pat)
8985                         return -ENOBUFS;
8986                 pat_len = wowlan->patterns[i].pattern_len;
8987                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8988                             wowlan->patterns[i].mask) ||
8989                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8990                             wowlan->patterns[i].pattern) ||
8991                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8992                                 wowlan->patterns[i].pkt_offset))
8993                         return -ENOBUFS;
8994                 nla_nest_end(msg, nl_pat);
8995         }
8996         nla_nest_end(msg, nl_pats);
8997
8998         return 0;
8999 }
9000
9001 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9002                                    struct cfg80211_wowlan_tcp *tcp)
9003 {
9004         struct nlattr *nl_tcp;
9005
9006         if (!tcp)
9007                 return 0;
9008
9009         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9010         if (!nl_tcp)
9011                 return -ENOBUFS;
9012
9013         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9014             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9015             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9016             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9017             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9018             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9019                     tcp->payload_len, tcp->payload) ||
9020             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9021                         tcp->data_interval) ||
9022             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9023                     tcp->wake_len, tcp->wake_data) ||
9024             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9025                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9026                 return -ENOBUFS;
9027
9028         if (tcp->payload_seq.len &&
9029             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9030                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9031                 return -ENOBUFS;
9032
9033         if (tcp->payload_tok.len &&
9034             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9035                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9036                     &tcp->payload_tok))
9037                 return -ENOBUFS;
9038
9039         nla_nest_end(msg, nl_tcp);
9040
9041         return 0;
9042 }
9043
9044 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9045                                   struct cfg80211_sched_scan_request *req)
9046 {
9047         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9048         int i;
9049
9050         if (!req)
9051                 return 0;
9052
9053         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9054         if (!nd)
9055                 return -ENOBUFS;
9056
9057         if (req->n_scan_plans == 1 &&
9058             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9059                         req->scan_plans[0].interval * 1000))
9060                 return -ENOBUFS;
9061
9062         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9063                 return -ENOBUFS;
9064
9065         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9066         if (!freqs)
9067                 return -ENOBUFS;
9068
9069         for (i = 0; i < req->n_channels; i++)
9070                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9071
9072         nla_nest_end(msg, freqs);
9073
9074         if (req->n_match_sets) {
9075                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9076                 for (i = 0; i < req->n_match_sets; i++) {
9077                         match = nla_nest_start(msg, i);
9078                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9079                                 req->match_sets[i].ssid.ssid_len,
9080                                 req->match_sets[i].ssid.ssid);
9081                         nla_nest_end(msg, match);
9082                 }
9083                 nla_nest_end(msg, matches);
9084         }
9085
9086         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9087         if (!scan_plans)
9088                 return -ENOBUFS;
9089
9090         for (i = 0; i < req->n_scan_plans; i++) {
9091                 scan_plan = nla_nest_start(msg, i + 1);
9092                 if (!scan_plan ||
9093                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9094                                 req->scan_plans[i].interval) ||
9095                     (req->scan_plans[i].iterations &&
9096                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9097                                  req->scan_plans[i].iterations)))
9098                         return -ENOBUFS;
9099                 nla_nest_end(msg, scan_plan);
9100         }
9101         nla_nest_end(msg, scan_plans);
9102
9103         nla_nest_end(msg, nd);
9104
9105         return 0;
9106 }
9107
9108 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9109 {
9110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9111         struct sk_buff *msg;
9112         void *hdr;
9113         u32 size = NLMSG_DEFAULT_SIZE;
9114
9115         if (!rdev->wiphy.wowlan)
9116                 return -EOPNOTSUPP;
9117
9118         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9119                 /* adjust size to have room for all the data */
9120                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9121                         rdev->wiphy.wowlan_config->tcp->payload_len +
9122                         rdev->wiphy.wowlan_config->tcp->wake_len +
9123                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9124         }
9125
9126         msg = nlmsg_new(size, GFP_KERNEL);
9127         if (!msg)
9128                 return -ENOMEM;
9129
9130         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9131                              NL80211_CMD_GET_WOWLAN);
9132         if (!hdr)
9133                 goto nla_put_failure;
9134
9135         if (rdev->wiphy.wowlan_config) {
9136                 struct nlattr *nl_wowlan;
9137
9138                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9139                 if (!nl_wowlan)
9140                         goto nla_put_failure;
9141
9142                 if ((rdev->wiphy.wowlan_config->any &&
9143                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9144                     (rdev->wiphy.wowlan_config->disconnect &&
9145                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9146                     (rdev->wiphy.wowlan_config->magic_pkt &&
9147                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9148                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9149                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9150                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9151                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9152                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9153                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9154                     (rdev->wiphy.wowlan_config->rfkill_release &&
9155                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9156                         goto nla_put_failure;
9157
9158                 if (nl80211_send_wowlan_patterns(msg, rdev))
9159                         goto nla_put_failure;
9160
9161                 if (nl80211_send_wowlan_tcp(msg,
9162                                             rdev->wiphy.wowlan_config->tcp))
9163                         goto nla_put_failure;
9164
9165                 if (nl80211_send_wowlan_nd(
9166                             msg,
9167                             rdev->wiphy.wowlan_config->nd_config))
9168                         goto nla_put_failure;
9169
9170                 nla_nest_end(msg, nl_wowlan);
9171         }
9172
9173         genlmsg_end(msg, hdr);
9174         return genlmsg_reply(msg, info);
9175
9176 nla_put_failure:
9177         nlmsg_free(msg);
9178         return -ENOBUFS;
9179 }
9180
9181 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9182                                     struct nlattr *attr,
9183                                     struct cfg80211_wowlan *trig)
9184 {
9185         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9186         struct cfg80211_wowlan_tcp *cfg;
9187         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9188         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9189         u32 size;
9190         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9191         int err, port;
9192
9193         if (!rdev->wiphy.wowlan->tcp)
9194                 return -EINVAL;
9195
9196         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9197                         nla_data(attr), nla_len(attr),
9198                         nl80211_wowlan_tcp_policy);
9199         if (err)
9200                 return err;
9201
9202         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9203             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9204             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9205             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9206             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9207             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9208             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9209             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9210                 return -EINVAL;
9211
9212         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9213         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9214                 return -EINVAL;
9215
9216         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9217                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9218             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9219                 return -EINVAL;
9220
9221         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9222         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9223                 return -EINVAL;
9224
9225         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9226         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9227                 return -EINVAL;
9228
9229         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9230                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9231
9232                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9233                 tokens_size = tokln - sizeof(*tok);
9234
9235                 if (!tok->len || tokens_size % tok->len)
9236                         return -EINVAL;
9237                 if (!rdev->wiphy.wowlan->tcp->tok)
9238                         return -EINVAL;
9239                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9240                         return -EINVAL;
9241                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9242                         return -EINVAL;
9243                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9244                         return -EINVAL;
9245                 if (tok->offset + tok->len > data_size)
9246                         return -EINVAL;
9247         }
9248
9249         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9250                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9251                 if (!rdev->wiphy.wowlan->tcp->seq)
9252                         return -EINVAL;
9253                 if (seq->len == 0 || seq->len > 4)
9254                         return -EINVAL;
9255                 if (seq->len + seq->offset > data_size)
9256                         return -EINVAL;
9257         }
9258
9259         size = sizeof(*cfg);
9260         size += data_size;
9261         size += wake_size + wake_mask_size;
9262         size += tokens_size;
9263
9264         cfg = kzalloc(size, GFP_KERNEL);
9265         if (!cfg)
9266                 return -ENOMEM;
9267         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9268         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9269         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9270                ETH_ALEN);
9271         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9272                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9273         else
9274                 port = 0;
9275 #ifdef CONFIG_INET
9276         /* allocate a socket and port for it and use it */
9277         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9278                             IPPROTO_TCP, &cfg->sock, 1);
9279         if (err) {
9280                 kfree(cfg);
9281                 return err;
9282         }
9283         if (inet_csk_get_port(cfg->sock->sk, port)) {
9284                 sock_release(cfg->sock);
9285                 kfree(cfg);
9286                 return -EADDRINUSE;
9287         }
9288         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9289 #else
9290         if (!port) {
9291                 kfree(cfg);
9292                 return -EINVAL;
9293         }
9294         cfg->src_port = port;
9295 #endif
9296
9297         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9298         cfg->payload_len = data_size;
9299         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9300         memcpy((void *)cfg->payload,
9301                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9302                data_size);
9303         if (seq)
9304                 cfg->payload_seq = *seq;
9305         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9306         cfg->wake_len = wake_size;
9307         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9308         memcpy((void *)cfg->wake_data,
9309                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9310                wake_size);
9311         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9312                          data_size + wake_size;
9313         memcpy((void *)cfg->wake_mask,
9314                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9315                wake_mask_size);
9316         if (tok) {
9317                 cfg->tokens_size = tokens_size;
9318                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9319         }
9320
9321         trig->tcp = cfg;
9322
9323         return 0;
9324 }
9325
9326 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9327                                    const struct wiphy_wowlan_support *wowlan,
9328                                    struct nlattr *attr,
9329                                    struct cfg80211_wowlan *trig)
9330 {
9331         struct nlattr **tb;
9332         int err;
9333
9334         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9335         if (!tb)
9336                 return -ENOMEM;
9337
9338         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9339                 err = -EOPNOTSUPP;
9340                 goto out;
9341         }
9342
9343         err = nla_parse(tb, NL80211_ATTR_MAX,
9344                         nla_data(attr), nla_len(attr),
9345                         nl80211_policy);
9346         if (err)
9347                 goto out;
9348
9349         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9350         err = PTR_ERR_OR_ZERO(trig->nd_config);
9351         if (err)
9352                 trig->nd_config = NULL;
9353
9354 out:
9355         kfree(tb);
9356         return err;
9357 }
9358
9359 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9360 {
9361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9362         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9363         struct cfg80211_wowlan new_triggers = {};
9364         struct cfg80211_wowlan *ntrig;
9365         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9366         int err, i;
9367         bool prev_enabled = rdev->wiphy.wowlan_config;
9368         bool regular = false;
9369
9370         if (!wowlan)
9371                 return -EOPNOTSUPP;
9372
9373         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9374                 cfg80211_rdev_free_wowlan(rdev);
9375                 rdev->wiphy.wowlan_config = NULL;
9376                 goto set_wakeup;
9377         }
9378
9379         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9380                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9381                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9382                         nl80211_wowlan_policy);
9383         if (err)
9384                 return err;
9385
9386         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9387                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9388                         return -EINVAL;
9389                 new_triggers.any = true;
9390         }
9391
9392         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9393                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9394                         return -EINVAL;
9395                 new_triggers.disconnect = true;
9396                 regular = true;
9397         }
9398
9399         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9400                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9401                         return -EINVAL;
9402                 new_triggers.magic_pkt = true;
9403                 regular = true;
9404         }
9405
9406         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9407                 return -EINVAL;
9408
9409         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9410                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9411                         return -EINVAL;
9412                 new_triggers.gtk_rekey_failure = true;
9413                 regular = true;
9414         }
9415
9416         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9417                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9418                         return -EINVAL;
9419                 new_triggers.eap_identity_req = true;
9420                 regular = true;
9421         }
9422
9423         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9424                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9425                         return -EINVAL;
9426                 new_triggers.four_way_handshake = true;
9427                 regular = true;
9428         }
9429
9430         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9431                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9432                         return -EINVAL;
9433                 new_triggers.rfkill_release = true;
9434                 regular = true;
9435         }
9436
9437         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9438                 struct nlattr *pat;
9439                 int n_patterns = 0;
9440                 int rem, pat_len, mask_len, pkt_offset;
9441                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9442
9443                 regular = true;
9444
9445                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9446                                     rem)
9447                         n_patterns++;
9448                 if (n_patterns > wowlan->n_patterns)
9449                         return -EINVAL;
9450
9451                 new_triggers.patterns = kcalloc(n_patterns,
9452                                                 sizeof(new_triggers.patterns[0]),
9453                                                 GFP_KERNEL);
9454                 if (!new_triggers.patterns)
9455                         return -ENOMEM;
9456
9457                 new_triggers.n_patterns = n_patterns;
9458                 i = 0;
9459
9460                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9461                                     rem) {
9462                         u8 *mask_pat;
9463
9464                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9465                                   nla_len(pat), NULL);
9466                         err = -EINVAL;
9467                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9468                             !pat_tb[NL80211_PKTPAT_PATTERN])
9469                                 goto error;
9470                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9471                         mask_len = DIV_ROUND_UP(pat_len, 8);
9472                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9473                                 goto error;
9474                         if (pat_len > wowlan->pattern_max_len ||
9475                             pat_len < wowlan->pattern_min_len)
9476                                 goto error;
9477
9478                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9479                                 pkt_offset = 0;
9480                         else
9481                                 pkt_offset = nla_get_u32(
9482                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9483                         if (pkt_offset > wowlan->max_pkt_offset)
9484                                 goto error;
9485                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9486
9487                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9488                         if (!mask_pat) {
9489                                 err = -ENOMEM;
9490                                 goto error;
9491                         }
9492                         new_triggers.patterns[i].mask = mask_pat;
9493                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9494                                mask_len);
9495                         mask_pat += mask_len;
9496                         new_triggers.patterns[i].pattern = mask_pat;
9497                         new_triggers.patterns[i].pattern_len = pat_len;
9498                         memcpy(mask_pat,
9499                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9500                                pat_len);
9501                         i++;
9502                 }
9503         }
9504
9505         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9506                 regular = true;
9507                 err = nl80211_parse_wowlan_tcp(
9508                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9509                         &new_triggers);
9510                 if (err)
9511                         goto error;
9512         }
9513
9514         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9515                 regular = true;
9516                 err = nl80211_parse_wowlan_nd(
9517                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9518                         &new_triggers);
9519                 if (err)
9520                         goto error;
9521         }
9522
9523         /* The 'any' trigger means the device continues operating more or less
9524          * as in its normal operation mode and wakes up the host on most of the
9525          * normal interrupts (like packet RX, ...)
9526          * It therefore makes little sense to combine with the more constrained
9527          * wakeup trigger modes.
9528          */
9529         if (new_triggers.any && regular) {
9530                 err = -EINVAL;
9531                 goto error;
9532         }
9533
9534         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9535         if (!ntrig) {
9536                 err = -ENOMEM;
9537                 goto error;
9538         }
9539         cfg80211_rdev_free_wowlan(rdev);
9540         rdev->wiphy.wowlan_config = ntrig;
9541
9542  set_wakeup:
9543         if (rdev->ops->set_wakeup &&
9544             prev_enabled != !!rdev->wiphy.wowlan_config)
9545                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9546
9547         return 0;
9548  error:
9549         for (i = 0; i < new_triggers.n_patterns; i++)
9550                 kfree(new_triggers.patterns[i].mask);
9551         kfree(new_triggers.patterns);
9552         if (new_triggers.tcp && new_triggers.tcp->sock)
9553                 sock_release(new_triggers.tcp->sock);
9554         kfree(new_triggers.tcp);
9555         kfree(new_triggers.nd_config);
9556         return err;
9557 }
9558 #endif
9559
9560 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9561                                        struct cfg80211_registered_device *rdev)
9562 {
9563         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9564         int i, j, pat_len;
9565         struct cfg80211_coalesce_rules *rule;
9566
9567         if (!rdev->coalesce->n_rules)
9568                 return 0;
9569
9570         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9571         if (!nl_rules)
9572                 return -ENOBUFS;
9573
9574         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9575                 nl_rule = nla_nest_start(msg, i + 1);
9576                 if (!nl_rule)
9577                         return -ENOBUFS;
9578
9579                 rule = &rdev->coalesce->rules[i];
9580                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9581                                 rule->delay))
9582                         return -ENOBUFS;
9583
9584                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9585                                 rule->condition))
9586                         return -ENOBUFS;
9587
9588                 nl_pats = nla_nest_start(msg,
9589                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9590                 if (!nl_pats)
9591                         return -ENOBUFS;
9592
9593                 for (j = 0; j < rule->n_patterns; j++) {
9594                         nl_pat = nla_nest_start(msg, j + 1);
9595                         if (!nl_pat)
9596                                 return -ENOBUFS;
9597                         pat_len = rule->patterns[j].pattern_len;
9598                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9599                                     DIV_ROUND_UP(pat_len, 8),
9600                                     rule->patterns[j].mask) ||
9601                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9602                                     rule->patterns[j].pattern) ||
9603                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9604                                         rule->patterns[j].pkt_offset))
9605                                 return -ENOBUFS;
9606                         nla_nest_end(msg, nl_pat);
9607                 }
9608                 nla_nest_end(msg, nl_pats);
9609                 nla_nest_end(msg, nl_rule);
9610         }
9611         nla_nest_end(msg, nl_rules);
9612
9613         return 0;
9614 }
9615
9616 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9617 {
9618         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9619         struct sk_buff *msg;
9620         void *hdr;
9621
9622         if (!rdev->wiphy.coalesce)
9623                 return -EOPNOTSUPP;
9624
9625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9626         if (!msg)
9627                 return -ENOMEM;
9628
9629         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9630                              NL80211_CMD_GET_COALESCE);
9631         if (!hdr)
9632                 goto nla_put_failure;
9633
9634         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9635                 goto nla_put_failure;
9636
9637         genlmsg_end(msg, hdr);
9638         return genlmsg_reply(msg, info);
9639
9640 nla_put_failure:
9641         nlmsg_free(msg);
9642         return -ENOBUFS;
9643 }
9644
9645 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9646 {
9647         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9648         int i, j;
9649         struct cfg80211_coalesce_rules *rule;
9650
9651         if (!coalesce)
9652                 return;
9653
9654         for (i = 0; i < coalesce->n_rules; i++) {
9655                 rule = &coalesce->rules[i];
9656                 for (j = 0; j < rule->n_patterns; j++)
9657                         kfree(rule->patterns[j].mask);
9658                 kfree(rule->patterns);
9659         }
9660         kfree(coalesce->rules);
9661         kfree(coalesce);
9662         rdev->coalesce = NULL;
9663 }
9664
9665 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9666                                        struct nlattr *rule,
9667                                        struct cfg80211_coalesce_rules *new_rule)
9668 {
9669         int err, i;
9670         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9671         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9672         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9673         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9674
9675         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9676                         nla_len(rule), nl80211_coalesce_policy);
9677         if (err)
9678                 return err;
9679
9680         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9681                 new_rule->delay =
9682                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9683         if (new_rule->delay > coalesce->max_delay)
9684                 return -EINVAL;
9685
9686         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9687                 new_rule->condition =
9688                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9689         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9690             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9691                 return -EINVAL;
9692
9693         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9694                 return -EINVAL;
9695
9696         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9697                             rem)
9698                 n_patterns++;
9699         if (n_patterns > coalesce->n_patterns)
9700                 return -EINVAL;
9701
9702         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9703                                      GFP_KERNEL);
9704         if (!new_rule->patterns)
9705                 return -ENOMEM;
9706
9707         new_rule->n_patterns = n_patterns;
9708         i = 0;
9709
9710         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9711                             rem) {
9712                 u8 *mask_pat;
9713
9714                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9715                           nla_len(pat), NULL);
9716                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9717                     !pat_tb[NL80211_PKTPAT_PATTERN])
9718                         return -EINVAL;
9719                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9720                 mask_len = DIV_ROUND_UP(pat_len, 8);
9721                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9722                         return -EINVAL;
9723                 if (pat_len > coalesce->pattern_max_len ||
9724                     pat_len < coalesce->pattern_min_len)
9725                         return -EINVAL;
9726
9727                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9728                         pkt_offset = 0;
9729                 else
9730                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9731                 if (pkt_offset > coalesce->max_pkt_offset)
9732                         return -EINVAL;
9733                 new_rule->patterns[i].pkt_offset = pkt_offset;
9734
9735                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9736                 if (!mask_pat)
9737                         return -ENOMEM;
9738
9739                 new_rule->patterns[i].mask = mask_pat;
9740                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9741                        mask_len);
9742
9743                 mask_pat += mask_len;
9744                 new_rule->patterns[i].pattern = mask_pat;
9745                 new_rule->patterns[i].pattern_len = pat_len;
9746                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9747                        pat_len);
9748                 i++;
9749         }
9750
9751         return 0;
9752 }
9753
9754 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9755 {
9756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9757         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9758         struct cfg80211_coalesce new_coalesce = {};
9759         struct cfg80211_coalesce *n_coalesce;
9760         int err, rem_rule, n_rules = 0, i, j;
9761         struct nlattr *rule;
9762         struct cfg80211_coalesce_rules *tmp_rule;
9763
9764         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9765                 return -EOPNOTSUPP;
9766
9767         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9768                 cfg80211_rdev_free_coalesce(rdev);
9769                 rdev_set_coalesce(rdev, NULL);
9770                 return 0;
9771         }
9772
9773         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9774                             rem_rule)
9775                 n_rules++;
9776         if (n_rules > coalesce->n_rules)
9777                 return -EINVAL;
9778
9779         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9780                                      GFP_KERNEL);
9781         if (!new_coalesce.rules)
9782                 return -ENOMEM;
9783
9784         new_coalesce.n_rules = n_rules;
9785         i = 0;
9786
9787         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9788                             rem_rule) {
9789                 err = nl80211_parse_coalesce_rule(rdev, rule,
9790                                                   &new_coalesce.rules[i]);
9791                 if (err)
9792                         goto error;
9793
9794                 i++;
9795         }
9796
9797         err = rdev_set_coalesce(rdev, &new_coalesce);
9798         if (err)
9799                 goto error;
9800
9801         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9802         if (!n_coalesce) {
9803                 err = -ENOMEM;
9804                 goto error;
9805         }
9806         cfg80211_rdev_free_coalesce(rdev);
9807         rdev->coalesce = n_coalesce;
9808
9809         return 0;
9810 error:
9811         for (i = 0; i < new_coalesce.n_rules; i++) {
9812                 tmp_rule = &new_coalesce.rules[i];
9813                 for (j = 0; j < tmp_rule->n_patterns; j++)
9814                         kfree(tmp_rule->patterns[j].mask);
9815                 kfree(tmp_rule->patterns);
9816         }
9817         kfree(new_coalesce.rules);
9818
9819         return err;
9820 }
9821
9822 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9823 {
9824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9825         struct net_device *dev = info->user_ptr[1];
9826         struct wireless_dev *wdev = dev->ieee80211_ptr;
9827         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9828         struct cfg80211_gtk_rekey_data rekey_data;
9829         int err;
9830
9831         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9832                 return -EINVAL;
9833
9834         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9835                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9836                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9837                         nl80211_rekey_policy);
9838         if (err)
9839                 return err;
9840
9841         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9842                 return -ERANGE;
9843         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9844                 return -ERANGE;
9845         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9846                 return -ERANGE;
9847
9848         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9849         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9850         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9851
9852         wdev_lock(wdev);
9853         if (!wdev->current_bss) {
9854                 err = -ENOTCONN;
9855                 goto out;
9856         }
9857
9858         if (!rdev->ops->set_rekey_data) {
9859                 err = -EOPNOTSUPP;
9860                 goto out;
9861         }
9862
9863         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9864  out:
9865         wdev_unlock(wdev);
9866         return err;
9867 }
9868
9869 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9870                                              struct genl_info *info)
9871 {
9872         struct net_device *dev = info->user_ptr[1];
9873         struct wireless_dev *wdev = dev->ieee80211_ptr;
9874
9875         if (wdev->iftype != NL80211_IFTYPE_AP &&
9876             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9877                 return -EINVAL;
9878
9879         if (wdev->ap_unexpected_nlportid)
9880                 return -EBUSY;
9881
9882         wdev->ap_unexpected_nlportid = info->snd_portid;
9883         return 0;
9884 }
9885
9886 static int nl80211_probe_client(struct sk_buff *skb,
9887                                 struct genl_info *info)
9888 {
9889         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9890         struct net_device *dev = info->user_ptr[1];
9891         struct wireless_dev *wdev = dev->ieee80211_ptr;
9892         struct sk_buff *msg;
9893         void *hdr;
9894         const u8 *addr;
9895         u64 cookie;
9896         int err;
9897
9898         if (wdev->iftype != NL80211_IFTYPE_AP &&
9899             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9900                 return -EOPNOTSUPP;
9901
9902         if (!info->attrs[NL80211_ATTR_MAC])
9903                 return -EINVAL;
9904
9905         if (!rdev->ops->probe_client)
9906                 return -EOPNOTSUPP;
9907
9908         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9909         if (!msg)
9910                 return -ENOMEM;
9911
9912         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9913                              NL80211_CMD_PROBE_CLIENT);
9914         if (!hdr) {
9915                 err = -ENOBUFS;
9916                 goto free_msg;
9917         }
9918
9919         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9920
9921         err = rdev_probe_client(rdev, dev, addr, &cookie);
9922         if (err)
9923                 goto free_msg;
9924
9925         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9926                 goto nla_put_failure;
9927
9928         genlmsg_end(msg, hdr);
9929
9930         return genlmsg_reply(msg, info);
9931
9932  nla_put_failure:
9933         err = -ENOBUFS;
9934  free_msg:
9935         nlmsg_free(msg);
9936         return err;
9937 }
9938
9939 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9940 {
9941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9942         struct cfg80211_beacon_registration *reg, *nreg;
9943         int rv;
9944
9945         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9946                 return -EOPNOTSUPP;
9947
9948         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9949         if (!nreg)
9950                 return -ENOMEM;
9951
9952         /* First, check if already registered. */
9953         spin_lock_bh(&rdev->beacon_registrations_lock);
9954         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9955                 if (reg->nlportid == info->snd_portid) {
9956                         rv = -EALREADY;
9957                         goto out_err;
9958                 }
9959         }
9960         /* Add it to the list */
9961         nreg->nlportid = info->snd_portid;
9962         list_add(&nreg->list, &rdev->beacon_registrations);
9963
9964         spin_unlock_bh(&rdev->beacon_registrations_lock);
9965
9966         return 0;
9967 out_err:
9968         spin_unlock_bh(&rdev->beacon_registrations_lock);
9969         kfree(nreg);
9970         return rv;
9971 }
9972
9973 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9974 {
9975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9976         struct wireless_dev *wdev = info->user_ptr[1];
9977         int err;
9978
9979         if (!rdev->ops->start_p2p_device)
9980                 return -EOPNOTSUPP;
9981
9982         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9983                 return -EOPNOTSUPP;
9984
9985         if (wdev->p2p_started)
9986                 return 0;
9987
9988         if (rfkill_blocked(rdev->rfkill))
9989                 return -ERFKILL;
9990
9991         err = rdev_start_p2p_device(rdev, wdev);
9992         if (err)
9993                 return err;
9994
9995         wdev->p2p_started = true;
9996         rdev->opencount++;
9997
9998         return 0;
9999 }
10000
10001 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10002 {
10003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10004         struct wireless_dev *wdev = info->user_ptr[1];
10005
10006         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10007                 return -EOPNOTSUPP;
10008
10009         if (!rdev->ops->stop_p2p_device)
10010                 return -EOPNOTSUPP;
10011
10012         cfg80211_stop_p2p_device(rdev, wdev);
10013
10014         return 0;
10015 }
10016
10017 static int nl80211_get_protocol_features(struct sk_buff *skb,
10018                                          struct genl_info *info)
10019 {
10020         void *hdr;
10021         struct sk_buff *msg;
10022
10023         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10024         if (!msg)
10025                 return -ENOMEM;
10026
10027         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10028                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10029         if (!hdr)
10030                 goto nla_put_failure;
10031
10032         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10033                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10034                 goto nla_put_failure;
10035
10036         genlmsg_end(msg, hdr);
10037         return genlmsg_reply(msg, info);
10038
10039  nla_put_failure:
10040         kfree_skb(msg);
10041         return -ENOBUFS;
10042 }
10043
10044 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10045 {
10046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10047         struct cfg80211_update_ft_ies_params ft_params;
10048         struct net_device *dev = info->user_ptr[1];
10049
10050         if (!rdev->ops->update_ft_ies)
10051                 return -EOPNOTSUPP;
10052
10053         if (!info->attrs[NL80211_ATTR_MDID] ||
10054             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10055                 return -EINVAL;
10056
10057         memset(&ft_params, 0, sizeof(ft_params));
10058         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10059         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10060         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10061
10062         return rdev_update_ft_ies(rdev, dev, &ft_params);
10063 }
10064
10065 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10066                                        struct genl_info *info)
10067 {
10068         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10069         struct wireless_dev *wdev = info->user_ptr[1];
10070         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10071         u16 duration;
10072         int ret;
10073
10074         if (!rdev->ops->crit_proto_start)
10075                 return -EOPNOTSUPP;
10076
10077         if (WARN_ON(!rdev->ops->crit_proto_stop))
10078                 return -EINVAL;
10079
10080         if (rdev->crit_proto_nlportid)
10081                 return -EBUSY;
10082
10083         /* determine protocol if provided */
10084         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10085                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10086
10087         if (proto >= NUM_NL80211_CRIT_PROTO)
10088                 return -EINVAL;
10089
10090         /* timeout must be provided */
10091         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10092                 return -EINVAL;
10093
10094         duration =
10095                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10096
10097         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10098                 return -ERANGE;
10099
10100         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10101         if (!ret)
10102                 rdev->crit_proto_nlportid = info->snd_portid;
10103
10104         return ret;
10105 }
10106
10107 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10108                                       struct genl_info *info)
10109 {
10110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10111         struct wireless_dev *wdev = info->user_ptr[1];
10112
10113         if (!rdev->ops->crit_proto_stop)
10114                 return -EOPNOTSUPP;
10115
10116         if (rdev->crit_proto_nlportid) {
10117                 rdev->crit_proto_nlportid = 0;
10118                 rdev_crit_proto_stop(rdev, wdev);
10119         }
10120         return 0;
10121 }
10122
10123 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10124 {
10125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10126         struct wireless_dev *wdev =
10127                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10128         int i, err;
10129         u32 vid, subcmd;
10130
10131         if (!rdev->wiphy.vendor_commands)
10132                 return -EOPNOTSUPP;
10133
10134         if (IS_ERR(wdev)) {
10135                 err = PTR_ERR(wdev);
10136                 if (err != -EINVAL)
10137                         return err;
10138                 wdev = NULL;
10139         } else if (wdev->wiphy != &rdev->wiphy) {
10140                 return -EINVAL;
10141         }
10142
10143         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10144             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10145                 return -EINVAL;
10146
10147         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10148         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10149         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10150                 const struct wiphy_vendor_command *vcmd;
10151                 void *data = NULL;
10152                 int len = 0;
10153
10154                 vcmd = &rdev->wiphy.vendor_commands[i];
10155
10156                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10157                         continue;
10158
10159                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10160                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10161                         if (!wdev)
10162                                 return -EINVAL;
10163                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10164                             !wdev->netdev)
10165                                 return -EINVAL;
10166
10167                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10168                                 if (wdev->netdev &&
10169                                     !netif_running(wdev->netdev))
10170                                         return -ENETDOWN;
10171                                 if (!wdev->netdev && !wdev->p2p_started)
10172                                         return -ENETDOWN;
10173                         }
10174
10175                         if (!vcmd->doit)
10176                                 return -EOPNOTSUPP;
10177                 } else {
10178                         wdev = NULL;
10179                 }
10180
10181                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10182                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10183                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10184                 }
10185
10186                 rdev->cur_cmd_info = info;
10187                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10188                                                           data, len);
10189                 rdev->cur_cmd_info = NULL;
10190                 return err;
10191         }
10192
10193         return -EOPNOTSUPP;
10194 }
10195
10196 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10197                                        struct netlink_callback *cb,
10198                                        struct cfg80211_registered_device **rdev,
10199                                        struct wireless_dev **wdev)
10200 {
10201         u32 vid, subcmd;
10202         unsigned int i;
10203         int vcmd_idx = -1;
10204         int err;
10205         void *data = NULL;
10206         unsigned int data_len = 0;
10207
10208         rtnl_lock();
10209
10210         if (cb->args[0]) {
10211                 /* subtract the 1 again here */
10212                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10213                 struct wireless_dev *tmp;
10214
10215                 if (!wiphy) {
10216                         err = -ENODEV;
10217                         goto out_unlock;
10218                 }
10219                 *rdev = wiphy_to_rdev(wiphy);
10220                 *wdev = NULL;
10221
10222                 if (cb->args[1]) {
10223                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10224                                 if (tmp->identifier == cb->args[1] - 1) {
10225                                         *wdev = tmp;
10226                                         break;
10227                                 }
10228                         }
10229                 }
10230
10231                 /* keep rtnl locked in successful case */
10232                 return 0;
10233         }
10234
10235         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10236                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10237                           nl80211_policy);
10238         if (err)
10239                 goto out_unlock;
10240
10241         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10242             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10243                 err = -EINVAL;
10244                 goto out_unlock;
10245         }
10246
10247         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10248                                            nl80211_fam.attrbuf);
10249         if (IS_ERR(*wdev))
10250                 *wdev = NULL;
10251
10252         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10253                                            nl80211_fam.attrbuf);
10254         if (IS_ERR(*rdev)) {
10255                 err = PTR_ERR(*rdev);
10256                 goto out_unlock;
10257         }
10258
10259         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10260         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10261
10262         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10263                 const struct wiphy_vendor_command *vcmd;
10264
10265                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10266
10267                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10268                         continue;
10269
10270                 if (!vcmd->dumpit) {
10271                         err = -EOPNOTSUPP;
10272                         goto out_unlock;
10273                 }
10274
10275                 vcmd_idx = i;
10276                 break;
10277         }
10278
10279         if (vcmd_idx < 0) {
10280                 err = -EOPNOTSUPP;
10281                 goto out_unlock;
10282         }
10283
10284         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10285                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10286                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10287         }
10288
10289         /* 0 is the first index - add 1 to parse only once */
10290         cb->args[0] = (*rdev)->wiphy_idx + 1;
10291         /* add 1 to know if it was NULL */
10292         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10293         cb->args[2] = vcmd_idx;
10294         cb->args[3] = (unsigned long)data;
10295         cb->args[4] = data_len;
10296
10297         /* keep rtnl locked in successful case */
10298         return 0;
10299  out_unlock:
10300         rtnl_unlock();
10301         return err;
10302 }
10303
10304 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10305                                    struct netlink_callback *cb)
10306 {
10307         struct cfg80211_registered_device *rdev;
10308         struct wireless_dev *wdev;
10309         unsigned int vcmd_idx;
10310         const struct wiphy_vendor_command *vcmd;
10311         void *data;
10312         int data_len;
10313         int err;
10314         struct nlattr *vendor_data;
10315
10316         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10317         if (err)
10318                 return err;
10319
10320         vcmd_idx = cb->args[2];
10321         data = (void *)cb->args[3];
10322         data_len = cb->args[4];
10323         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10324
10325         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10326                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10327                 if (!wdev)
10328                         return -EINVAL;
10329                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10330                     !wdev->netdev)
10331                         return -EINVAL;
10332
10333                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10334                         if (wdev->netdev &&
10335                             !netif_running(wdev->netdev))
10336                                 return -ENETDOWN;
10337                         if (!wdev->netdev && !wdev->p2p_started)
10338                                 return -ENETDOWN;
10339                 }
10340         }
10341
10342         while (1) {
10343                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10344                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10345                                            NL80211_CMD_VENDOR);
10346                 if (!hdr)
10347                         break;
10348
10349                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10350                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10351                                          wdev_id(wdev)))) {
10352                         genlmsg_cancel(skb, hdr);
10353                         break;
10354                 }
10355
10356                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10357                 if (!vendor_data) {
10358                         genlmsg_cancel(skb, hdr);
10359                         break;
10360                 }
10361
10362                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10363                                    (unsigned long *)&cb->args[5]);
10364                 nla_nest_end(skb, vendor_data);
10365
10366                 if (err == -ENOBUFS || err == -ENOENT) {
10367                         genlmsg_cancel(skb, hdr);
10368                         break;
10369                 } else if (err) {
10370                         genlmsg_cancel(skb, hdr);
10371                         goto out;
10372                 }
10373
10374                 genlmsg_end(skb, hdr);
10375         }
10376
10377         err = skb->len;
10378  out:
10379         rtnl_unlock();
10380         return err;
10381 }
10382
10383 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10384                                            enum nl80211_commands cmd,
10385                                            enum nl80211_attrs attr,
10386                                            int approxlen)
10387 {
10388         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10389
10390         if (WARN_ON(!rdev->cur_cmd_info))
10391                 return NULL;
10392
10393         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10394                                            rdev->cur_cmd_info->snd_portid,
10395                                            rdev->cur_cmd_info->snd_seq,
10396                                            cmd, attr, NULL, GFP_KERNEL);
10397 }
10398 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10399
10400 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10401 {
10402         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10403         void *hdr = ((void **)skb->cb)[1];
10404         struct nlattr *data = ((void **)skb->cb)[2];
10405
10406         /* clear CB data for netlink core to own from now on */
10407         memset(skb->cb, 0, sizeof(skb->cb));
10408
10409         if (WARN_ON(!rdev->cur_cmd_info)) {
10410                 kfree_skb(skb);
10411                 return -EINVAL;
10412         }
10413
10414         nla_nest_end(skb, data);
10415         genlmsg_end(skb, hdr);
10416         return genlmsg_reply(skb, rdev->cur_cmd_info);
10417 }
10418 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10419
10420
10421 static int nl80211_set_qos_map(struct sk_buff *skb,
10422                                struct genl_info *info)
10423 {
10424         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10425         struct cfg80211_qos_map *qos_map = NULL;
10426         struct net_device *dev = info->user_ptr[1];
10427         u8 *pos, len, num_des, des_len, des;
10428         int ret;
10429
10430         if (!rdev->ops->set_qos_map)
10431                 return -EOPNOTSUPP;
10432
10433         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10434                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10435                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10436
10437                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10438                     len > IEEE80211_QOS_MAP_LEN_MAX)
10439                         return -EINVAL;
10440
10441                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10442                 if (!qos_map)
10443                         return -ENOMEM;
10444
10445                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10446                 if (num_des) {
10447                         des_len = num_des *
10448                                 sizeof(struct cfg80211_dscp_exception);
10449                         memcpy(qos_map->dscp_exception, pos, des_len);
10450                         qos_map->num_des = num_des;
10451                         for (des = 0; des < num_des; des++) {
10452                                 if (qos_map->dscp_exception[des].up > 7) {
10453                                         kfree(qos_map);
10454                                         return -EINVAL;
10455                                 }
10456                         }
10457                         pos += des_len;
10458                 }
10459                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10460         }
10461
10462         wdev_lock(dev->ieee80211_ptr);
10463         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10464         if (!ret)
10465                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10466         wdev_unlock(dev->ieee80211_ptr);
10467
10468         kfree(qos_map);
10469         return ret;
10470 }
10471
10472 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10473 {
10474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10475         struct net_device *dev = info->user_ptr[1];
10476         struct wireless_dev *wdev = dev->ieee80211_ptr;
10477         const u8 *peer;
10478         u8 tsid, up;
10479         u16 admitted_time = 0;
10480         int err;
10481
10482         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10483                 return -EOPNOTSUPP;
10484
10485         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10486             !info->attrs[NL80211_ATTR_USER_PRIO])
10487                 return -EINVAL;
10488
10489         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10490         if (tsid >= IEEE80211_NUM_TIDS)
10491                 return -EINVAL;
10492
10493         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10494         if (up >= IEEE80211_NUM_UPS)
10495                 return -EINVAL;
10496
10497         /* WMM uses TIDs 0-7 even for TSPEC */
10498         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10499                 /* TODO: handle 802.11 TSPEC/admission control
10500                  * need more attributes for that (e.g. BA session requirement);
10501                  * change the WMM adminssion test above to allow both then
10502                  */
10503                 return -EINVAL;
10504         }
10505
10506         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10507
10508         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10509                 admitted_time =
10510                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10511                 if (!admitted_time)
10512                         return -EINVAL;
10513         }
10514
10515         wdev_lock(wdev);
10516         switch (wdev->iftype) {
10517         case NL80211_IFTYPE_STATION:
10518         case NL80211_IFTYPE_P2P_CLIENT:
10519                 if (wdev->current_bss)
10520                         break;
10521                 err = -ENOTCONN;
10522                 goto out;
10523         default:
10524                 err = -EOPNOTSUPP;
10525                 goto out;
10526         }
10527
10528         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10529
10530  out:
10531         wdev_unlock(wdev);
10532         return err;
10533 }
10534
10535 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10536 {
10537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10538         struct net_device *dev = info->user_ptr[1];
10539         struct wireless_dev *wdev = dev->ieee80211_ptr;
10540         const u8 *peer;
10541         u8 tsid;
10542         int err;
10543
10544         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10545                 return -EINVAL;
10546
10547         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10548         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10549
10550         wdev_lock(wdev);
10551         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10552         wdev_unlock(wdev);
10553
10554         return err;
10555 }
10556
10557 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10558                                        struct genl_info *info)
10559 {
10560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10561         struct net_device *dev = info->user_ptr[1];
10562         struct wireless_dev *wdev = dev->ieee80211_ptr;
10563         struct cfg80211_chan_def chandef = {};
10564         const u8 *addr;
10565         u8 oper_class;
10566         int err;
10567
10568         if (!rdev->ops->tdls_channel_switch ||
10569             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10570                 return -EOPNOTSUPP;
10571
10572         switch (dev->ieee80211_ptr->iftype) {
10573         case NL80211_IFTYPE_STATION:
10574         case NL80211_IFTYPE_P2P_CLIENT:
10575                 break;
10576         default:
10577                 return -EOPNOTSUPP;
10578         }
10579
10580         if (!info->attrs[NL80211_ATTR_MAC] ||
10581             !info->attrs[NL80211_ATTR_OPER_CLASS])
10582                 return -EINVAL;
10583
10584         err = nl80211_parse_chandef(rdev, info, &chandef);
10585         if (err)
10586                 return err;
10587
10588         /*
10589          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10590          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10591          * specification is not defined for them.
10592          */
10593         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10594             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10595             chandef.width != NL80211_CHAN_WIDTH_20)
10596                 return -EINVAL;
10597
10598         /* we will be active on the TDLS link */
10599         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10600                                            wdev->iftype))
10601                 return -EINVAL;
10602
10603         /* don't allow switching to DFS channels */
10604         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10605                 return -EINVAL;
10606
10607         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10608         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10609
10610         wdev_lock(wdev);
10611         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10612         wdev_unlock(wdev);
10613
10614         return err;
10615 }
10616
10617 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10618                                               struct genl_info *info)
10619 {
10620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10621         struct net_device *dev = info->user_ptr[1];
10622         struct wireless_dev *wdev = dev->ieee80211_ptr;
10623         const u8 *addr;
10624
10625         if (!rdev->ops->tdls_channel_switch ||
10626             !rdev->ops->tdls_cancel_channel_switch ||
10627             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10628                 return -EOPNOTSUPP;
10629
10630         switch (dev->ieee80211_ptr->iftype) {
10631         case NL80211_IFTYPE_STATION:
10632         case NL80211_IFTYPE_P2P_CLIENT:
10633                 break;
10634         default:
10635                 return -EOPNOTSUPP;
10636         }
10637
10638         if (!info->attrs[NL80211_ATTR_MAC])
10639                 return -EINVAL;
10640
10641         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10642
10643         wdev_lock(wdev);
10644         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10645         wdev_unlock(wdev);
10646
10647         return 0;
10648 }
10649
10650 #define NL80211_FLAG_NEED_WIPHY         0x01
10651 #define NL80211_FLAG_NEED_NETDEV        0x02
10652 #define NL80211_FLAG_NEED_RTNL          0x04
10653 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10654 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10655                                          NL80211_FLAG_CHECK_NETDEV_UP)
10656 #define NL80211_FLAG_NEED_WDEV          0x10
10657 /* If a netdev is associated, it must be UP, P2P must be started */
10658 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10659                                          NL80211_FLAG_CHECK_NETDEV_UP)
10660 #define NL80211_FLAG_CLEAR_SKB          0x20
10661
10662 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10663                             struct genl_info *info)
10664 {
10665         struct cfg80211_registered_device *rdev;
10666         struct wireless_dev *wdev;
10667         struct net_device *dev;
10668         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10669
10670         if (rtnl)
10671                 rtnl_lock();
10672
10673         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10674                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10675                 if (IS_ERR(rdev)) {
10676                         if (rtnl)
10677                                 rtnl_unlock();
10678                         return PTR_ERR(rdev);
10679                 }
10680                 info->user_ptr[0] = rdev;
10681         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10682                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10683                 ASSERT_RTNL();
10684
10685                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10686                                                   info->attrs);
10687                 if (IS_ERR(wdev)) {
10688                         if (rtnl)
10689                                 rtnl_unlock();
10690                         return PTR_ERR(wdev);
10691                 }
10692
10693                 dev = wdev->netdev;
10694                 rdev = wiphy_to_rdev(wdev->wiphy);
10695
10696                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10697                         if (!dev) {
10698                                 if (rtnl)
10699                                         rtnl_unlock();
10700                                 return -EINVAL;
10701                         }
10702
10703                         info->user_ptr[1] = dev;
10704                 } else {
10705                         info->user_ptr[1] = wdev;
10706                 }
10707
10708                 if (dev) {
10709                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10710                             !netif_running(dev)) {
10711                                 if (rtnl)
10712                                         rtnl_unlock();
10713                                 return -ENETDOWN;
10714                         }
10715
10716                         dev_hold(dev);
10717                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10718                         if (!wdev->p2p_started) {
10719                                 if (rtnl)
10720                                         rtnl_unlock();
10721                                 return -ENETDOWN;
10722                         }
10723                 }
10724
10725                 info->user_ptr[0] = rdev;
10726         }
10727
10728         return 0;
10729 }
10730
10731 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10732                               struct genl_info *info)
10733 {
10734         if (info->user_ptr[1]) {
10735                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10736                         struct wireless_dev *wdev = info->user_ptr[1];
10737
10738                         if (wdev->netdev)
10739                                 dev_put(wdev->netdev);
10740                 } else {
10741                         dev_put(info->user_ptr[1]);
10742                 }
10743         }
10744
10745         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10746                 rtnl_unlock();
10747
10748         /* If needed, clear the netlink message payload from the SKB
10749          * as it might contain key data that shouldn't stick around on
10750          * the heap after the SKB is freed. The netlink message header
10751          * is still needed for further processing, so leave it intact.
10752          */
10753         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10754                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10755
10756                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10757         }
10758 }
10759
10760 static const struct genl_ops nl80211_ops[] = {
10761         {
10762                 .cmd = NL80211_CMD_GET_WIPHY,
10763                 .doit = nl80211_get_wiphy,
10764                 .dumpit = nl80211_dump_wiphy,
10765                 .done = nl80211_dump_wiphy_done,
10766                 .policy = nl80211_policy,
10767                 /* can be retrieved by unprivileged users */
10768                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10769                                   NL80211_FLAG_NEED_RTNL,
10770         },
10771         {
10772                 .cmd = NL80211_CMD_SET_WIPHY,
10773                 .doit = nl80211_set_wiphy,
10774                 .policy = nl80211_policy,
10775                 .flags = GENL_ADMIN_PERM,
10776                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10777         },
10778         {
10779                 .cmd = NL80211_CMD_GET_INTERFACE,
10780                 .doit = nl80211_get_interface,
10781                 .dumpit = nl80211_dump_interface,
10782                 .policy = nl80211_policy,
10783                 /* can be retrieved by unprivileged users */
10784                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10785                                   NL80211_FLAG_NEED_RTNL,
10786         },
10787         {
10788                 .cmd = NL80211_CMD_SET_INTERFACE,
10789                 .doit = nl80211_set_interface,
10790                 .policy = nl80211_policy,
10791                 .flags = GENL_ADMIN_PERM,
10792                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10793                                   NL80211_FLAG_NEED_RTNL,
10794         },
10795         {
10796                 .cmd = NL80211_CMD_NEW_INTERFACE,
10797                 .doit = nl80211_new_interface,
10798                 .policy = nl80211_policy,
10799                 .flags = GENL_ADMIN_PERM,
10800                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10801                                   NL80211_FLAG_NEED_RTNL,
10802         },
10803         {
10804                 .cmd = NL80211_CMD_DEL_INTERFACE,
10805                 .doit = nl80211_del_interface,
10806                 .policy = nl80211_policy,
10807                 .flags = GENL_ADMIN_PERM,
10808                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10809                                   NL80211_FLAG_NEED_RTNL,
10810         },
10811         {
10812                 .cmd = NL80211_CMD_GET_KEY,
10813                 .doit = nl80211_get_key,
10814                 .policy = nl80211_policy,
10815                 .flags = GENL_ADMIN_PERM,
10816                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10817                                   NL80211_FLAG_NEED_RTNL,
10818         },
10819         {
10820                 .cmd = NL80211_CMD_SET_KEY,
10821                 .doit = nl80211_set_key,
10822                 .policy = nl80211_policy,
10823                 .flags = GENL_ADMIN_PERM,
10824                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10825                                   NL80211_FLAG_NEED_RTNL |
10826                                   NL80211_FLAG_CLEAR_SKB,
10827         },
10828         {
10829                 .cmd = NL80211_CMD_NEW_KEY,
10830                 .doit = nl80211_new_key,
10831                 .policy = nl80211_policy,
10832                 .flags = GENL_ADMIN_PERM,
10833                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10834                                   NL80211_FLAG_NEED_RTNL |
10835                                   NL80211_FLAG_CLEAR_SKB,
10836         },
10837         {
10838                 .cmd = NL80211_CMD_DEL_KEY,
10839                 .doit = nl80211_del_key,
10840                 .policy = nl80211_policy,
10841                 .flags = GENL_ADMIN_PERM,
10842                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10843                                   NL80211_FLAG_NEED_RTNL,
10844         },
10845         {
10846                 .cmd = NL80211_CMD_SET_BEACON,
10847                 .policy = nl80211_policy,
10848                 .flags = GENL_ADMIN_PERM,
10849                 .doit = nl80211_set_beacon,
10850                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10851                                   NL80211_FLAG_NEED_RTNL,
10852         },
10853         {
10854                 .cmd = NL80211_CMD_START_AP,
10855                 .policy = nl80211_policy,
10856                 .flags = GENL_ADMIN_PERM,
10857                 .doit = nl80211_start_ap,
10858                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10859                                   NL80211_FLAG_NEED_RTNL,
10860         },
10861         {
10862                 .cmd = NL80211_CMD_STOP_AP,
10863                 .policy = nl80211_policy,
10864                 .flags = GENL_ADMIN_PERM,
10865                 .doit = nl80211_stop_ap,
10866                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10867                                   NL80211_FLAG_NEED_RTNL,
10868         },
10869         {
10870                 .cmd = NL80211_CMD_GET_STATION,
10871                 .doit = nl80211_get_station,
10872                 .dumpit = nl80211_dump_station,
10873                 .policy = nl80211_policy,
10874                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10875                                   NL80211_FLAG_NEED_RTNL,
10876         },
10877         {
10878                 .cmd = NL80211_CMD_SET_STATION,
10879                 .doit = nl80211_set_station,
10880                 .policy = nl80211_policy,
10881                 .flags = GENL_ADMIN_PERM,
10882                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10883                                   NL80211_FLAG_NEED_RTNL,
10884         },
10885         {
10886                 .cmd = NL80211_CMD_NEW_STATION,
10887                 .doit = nl80211_new_station,
10888                 .policy = nl80211_policy,
10889                 .flags = GENL_ADMIN_PERM,
10890                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10891                                   NL80211_FLAG_NEED_RTNL,
10892         },
10893         {
10894                 .cmd = NL80211_CMD_DEL_STATION,
10895                 .doit = nl80211_del_station,
10896                 .policy = nl80211_policy,
10897                 .flags = GENL_ADMIN_PERM,
10898                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10899                                   NL80211_FLAG_NEED_RTNL,
10900         },
10901         {
10902                 .cmd = NL80211_CMD_GET_MPATH,
10903                 .doit = nl80211_get_mpath,
10904                 .dumpit = nl80211_dump_mpath,
10905                 .policy = nl80211_policy,
10906                 .flags = GENL_ADMIN_PERM,
10907                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10908                                   NL80211_FLAG_NEED_RTNL,
10909         },
10910         {
10911                 .cmd = NL80211_CMD_GET_MPP,
10912                 .doit = nl80211_get_mpp,
10913                 .dumpit = nl80211_dump_mpp,
10914                 .policy = nl80211_policy,
10915                 .flags = GENL_ADMIN_PERM,
10916                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10917                                   NL80211_FLAG_NEED_RTNL,
10918         },
10919         {
10920                 .cmd = NL80211_CMD_SET_MPATH,
10921                 .doit = nl80211_set_mpath,
10922                 .policy = nl80211_policy,
10923                 .flags = GENL_ADMIN_PERM,
10924                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10925                                   NL80211_FLAG_NEED_RTNL,
10926         },
10927         {
10928                 .cmd = NL80211_CMD_NEW_MPATH,
10929                 .doit = nl80211_new_mpath,
10930                 .policy = nl80211_policy,
10931                 .flags = GENL_ADMIN_PERM,
10932                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10933                                   NL80211_FLAG_NEED_RTNL,
10934         },
10935         {
10936                 .cmd = NL80211_CMD_DEL_MPATH,
10937                 .doit = nl80211_del_mpath,
10938                 .policy = nl80211_policy,
10939                 .flags = GENL_ADMIN_PERM,
10940                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10941                                   NL80211_FLAG_NEED_RTNL,
10942         },
10943         {
10944                 .cmd = NL80211_CMD_SET_BSS,
10945                 .doit = nl80211_set_bss,
10946                 .policy = nl80211_policy,
10947                 .flags = GENL_ADMIN_PERM,
10948                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10949                                   NL80211_FLAG_NEED_RTNL,
10950         },
10951         {
10952                 .cmd = NL80211_CMD_GET_REG,
10953                 .doit = nl80211_get_reg_do,
10954                 .dumpit = nl80211_get_reg_dump,
10955                 .policy = nl80211_policy,
10956                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10957                 /* can be retrieved by unprivileged users */
10958         },
10959 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
10960         {
10961                 .cmd = NL80211_CMD_SET_REG,
10962                 .doit = nl80211_set_reg,
10963                 .policy = nl80211_policy,
10964                 .flags = GENL_ADMIN_PERM,
10965                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10966         },
10967 #endif
10968         {
10969                 .cmd = NL80211_CMD_REQ_SET_REG,
10970                 .doit = nl80211_req_set_reg,
10971                 .policy = nl80211_policy,
10972                 .flags = GENL_ADMIN_PERM,
10973         },
10974         {
10975                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10976                 .doit = nl80211_get_mesh_config,
10977                 .policy = nl80211_policy,
10978                 /* can be retrieved by unprivileged users */
10979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10980                                   NL80211_FLAG_NEED_RTNL,
10981         },
10982         {
10983                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10984                 .doit = nl80211_update_mesh_config,
10985                 .policy = nl80211_policy,
10986                 .flags = GENL_ADMIN_PERM,
10987                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10988                                   NL80211_FLAG_NEED_RTNL,
10989         },
10990         {
10991                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10992                 .doit = nl80211_trigger_scan,
10993                 .policy = nl80211_policy,
10994                 .flags = GENL_ADMIN_PERM,
10995                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10996                                   NL80211_FLAG_NEED_RTNL,
10997         },
10998         {
10999                 .cmd = NL80211_CMD_ABORT_SCAN,
11000                 .doit = nl80211_abort_scan,
11001                 .policy = nl80211_policy,
11002                 .flags = GENL_ADMIN_PERM,
11003                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11004                                   NL80211_FLAG_NEED_RTNL,
11005         },
11006         {
11007                 .cmd = NL80211_CMD_GET_SCAN,
11008                 .policy = nl80211_policy,
11009                 .dumpit = nl80211_dump_scan,
11010         },
11011         {
11012                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11013                 .doit = nl80211_start_sched_scan,
11014                 .policy = nl80211_policy,
11015                 .flags = GENL_ADMIN_PERM,
11016                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11017                                   NL80211_FLAG_NEED_RTNL,
11018         },
11019         {
11020                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11021                 .doit = nl80211_stop_sched_scan,
11022                 .policy = nl80211_policy,
11023                 .flags = GENL_ADMIN_PERM,
11024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11025                                   NL80211_FLAG_NEED_RTNL,
11026         },
11027         {
11028                 .cmd = NL80211_CMD_AUTHENTICATE,
11029                 .doit = nl80211_authenticate,
11030                 .policy = nl80211_policy,
11031                 .flags = GENL_ADMIN_PERM,
11032                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11033                                   NL80211_FLAG_NEED_RTNL |
11034                                   NL80211_FLAG_CLEAR_SKB,
11035         },
11036         {
11037                 .cmd = NL80211_CMD_ASSOCIATE,
11038                 .doit = nl80211_associate,
11039                 .policy = nl80211_policy,
11040                 .flags = GENL_ADMIN_PERM,
11041                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11042                                   NL80211_FLAG_NEED_RTNL,
11043         },
11044         {
11045                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11046                 .doit = nl80211_deauthenticate,
11047                 .policy = nl80211_policy,
11048                 .flags = GENL_ADMIN_PERM,
11049                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11050                                   NL80211_FLAG_NEED_RTNL,
11051         },
11052         {
11053                 .cmd = NL80211_CMD_DISASSOCIATE,
11054                 .doit = nl80211_disassociate,
11055                 .policy = nl80211_policy,
11056                 .flags = GENL_ADMIN_PERM,
11057                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11058                                   NL80211_FLAG_NEED_RTNL,
11059         },
11060         {
11061                 .cmd = NL80211_CMD_JOIN_IBSS,
11062                 .doit = nl80211_join_ibss,
11063                 .policy = nl80211_policy,
11064                 .flags = GENL_ADMIN_PERM,
11065                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11066                                   NL80211_FLAG_NEED_RTNL,
11067         },
11068         {
11069                 .cmd = NL80211_CMD_LEAVE_IBSS,
11070                 .doit = nl80211_leave_ibss,
11071                 .policy = nl80211_policy,
11072                 .flags = GENL_ADMIN_PERM,
11073                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11074                                   NL80211_FLAG_NEED_RTNL,
11075         },
11076 #ifdef CONFIG_NL80211_TESTMODE
11077         {
11078                 .cmd = NL80211_CMD_TESTMODE,
11079                 .doit = nl80211_testmode_do,
11080                 .dumpit = nl80211_testmode_dump,
11081                 .policy = nl80211_policy,
11082                 .flags = GENL_ADMIN_PERM,
11083                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11084                                   NL80211_FLAG_NEED_RTNL,
11085         },
11086 #endif
11087         {
11088                 .cmd = NL80211_CMD_CONNECT,
11089                 .doit = nl80211_connect,
11090                 .policy = nl80211_policy,
11091                 .flags = GENL_ADMIN_PERM,
11092                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11093                                   NL80211_FLAG_NEED_RTNL,
11094         },
11095         {
11096                 .cmd = NL80211_CMD_DISCONNECT,
11097                 .doit = nl80211_disconnect,
11098                 .policy = nl80211_policy,
11099                 .flags = GENL_ADMIN_PERM,
11100                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11101                                   NL80211_FLAG_NEED_RTNL,
11102         },
11103         {
11104                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11105                 .doit = nl80211_wiphy_netns,
11106                 .policy = nl80211_policy,
11107                 .flags = GENL_ADMIN_PERM,
11108                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11109                                   NL80211_FLAG_NEED_RTNL,
11110         },
11111         {
11112                 .cmd = NL80211_CMD_GET_SURVEY,
11113                 .policy = nl80211_policy,
11114                 .dumpit = nl80211_dump_survey,
11115         },
11116         {
11117                 .cmd = NL80211_CMD_SET_PMKSA,
11118                 .doit = nl80211_setdel_pmksa,
11119                 .policy = nl80211_policy,
11120                 .flags = GENL_ADMIN_PERM,
11121                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11122                                   NL80211_FLAG_NEED_RTNL,
11123         },
11124         {
11125                 .cmd = NL80211_CMD_DEL_PMKSA,
11126                 .doit = nl80211_setdel_pmksa,
11127                 .policy = nl80211_policy,
11128                 .flags = GENL_ADMIN_PERM,
11129                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11130                                   NL80211_FLAG_NEED_RTNL,
11131         },
11132         {
11133                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11134                 .doit = nl80211_flush_pmksa,
11135                 .policy = nl80211_policy,
11136                 .flags = GENL_ADMIN_PERM,
11137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11138                                   NL80211_FLAG_NEED_RTNL,
11139         },
11140         {
11141                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11142                 .doit = nl80211_remain_on_channel,
11143                 .policy = nl80211_policy,
11144                 .flags = GENL_ADMIN_PERM,
11145                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11146                                   NL80211_FLAG_NEED_RTNL,
11147         },
11148         {
11149                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11150                 .doit = nl80211_cancel_remain_on_channel,
11151                 .policy = nl80211_policy,
11152                 .flags = GENL_ADMIN_PERM,
11153                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11154                                   NL80211_FLAG_NEED_RTNL,
11155         },
11156         {
11157                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11158                 .doit = nl80211_set_tx_bitrate_mask,
11159                 .policy = nl80211_policy,
11160                 .flags = GENL_ADMIN_PERM,
11161                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11162                                   NL80211_FLAG_NEED_RTNL,
11163         },
11164         {
11165                 .cmd = NL80211_CMD_REGISTER_FRAME,
11166                 .doit = nl80211_register_mgmt,
11167                 .policy = nl80211_policy,
11168                 .flags = GENL_ADMIN_PERM,
11169                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11170                                   NL80211_FLAG_NEED_RTNL,
11171         },
11172         {
11173                 .cmd = NL80211_CMD_FRAME,
11174                 .doit = nl80211_tx_mgmt,
11175                 .policy = nl80211_policy,
11176                 .flags = GENL_ADMIN_PERM,
11177                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11178                                   NL80211_FLAG_NEED_RTNL,
11179         },
11180         {
11181                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11182                 .doit = nl80211_tx_mgmt_cancel_wait,
11183                 .policy = nl80211_policy,
11184                 .flags = GENL_ADMIN_PERM,
11185                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11186                                   NL80211_FLAG_NEED_RTNL,
11187         },
11188         {
11189                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11190                 .doit = nl80211_set_power_save,
11191                 .policy = nl80211_policy,
11192                 .flags = GENL_ADMIN_PERM,
11193                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11194                                   NL80211_FLAG_NEED_RTNL,
11195         },
11196         {
11197                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11198                 .doit = nl80211_get_power_save,
11199                 .policy = nl80211_policy,
11200                 /* can be retrieved by unprivileged users */
11201                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11202                                   NL80211_FLAG_NEED_RTNL,
11203         },
11204         {
11205                 .cmd = NL80211_CMD_SET_CQM,
11206                 .doit = nl80211_set_cqm,
11207                 .policy = nl80211_policy,
11208                 .flags = GENL_ADMIN_PERM,
11209                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11210                                   NL80211_FLAG_NEED_RTNL,
11211         },
11212         {
11213                 .cmd = NL80211_CMD_SET_CHANNEL,
11214                 .doit = nl80211_set_channel,
11215                 .policy = nl80211_policy,
11216                 .flags = GENL_ADMIN_PERM,
11217                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11218                                   NL80211_FLAG_NEED_RTNL,
11219         },
11220         {
11221                 .cmd = NL80211_CMD_SET_WDS_PEER,
11222                 .doit = nl80211_set_wds_peer,
11223                 .policy = nl80211_policy,
11224                 .flags = GENL_ADMIN_PERM,
11225                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11226                                   NL80211_FLAG_NEED_RTNL,
11227         },
11228         {
11229                 .cmd = NL80211_CMD_JOIN_MESH,
11230                 .doit = nl80211_join_mesh,
11231                 .policy = nl80211_policy,
11232                 .flags = GENL_ADMIN_PERM,
11233                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11234                                   NL80211_FLAG_NEED_RTNL,
11235         },
11236         {
11237                 .cmd = NL80211_CMD_LEAVE_MESH,
11238                 .doit = nl80211_leave_mesh,
11239                 .policy = nl80211_policy,
11240                 .flags = GENL_ADMIN_PERM,
11241                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11242                                   NL80211_FLAG_NEED_RTNL,
11243         },
11244         {
11245                 .cmd = NL80211_CMD_JOIN_OCB,
11246                 .doit = nl80211_join_ocb,
11247                 .policy = nl80211_policy,
11248                 .flags = GENL_ADMIN_PERM,
11249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11250                                   NL80211_FLAG_NEED_RTNL,
11251         },
11252         {
11253                 .cmd = NL80211_CMD_LEAVE_OCB,
11254                 .doit = nl80211_leave_ocb,
11255                 .policy = nl80211_policy,
11256                 .flags = GENL_ADMIN_PERM,
11257                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11258                                   NL80211_FLAG_NEED_RTNL,
11259         },
11260 #ifdef CONFIG_PM
11261         {
11262                 .cmd = NL80211_CMD_GET_WOWLAN,
11263                 .doit = nl80211_get_wowlan,
11264                 .policy = nl80211_policy,
11265                 /* can be retrieved by unprivileged users */
11266                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11267                                   NL80211_FLAG_NEED_RTNL,
11268         },
11269         {
11270                 .cmd = NL80211_CMD_SET_WOWLAN,
11271                 .doit = nl80211_set_wowlan,
11272                 .policy = nl80211_policy,
11273                 .flags = GENL_ADMIN_PERM,
11274                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11275                                   NL80211_FLAG_NEED_RTNL,
11276         },
11277 #endif
11278         {
11279                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11280                 .doit = nl80211_set_rekey_data,
11281                 .policy = nl80211_policy,
11282                 .flags = GENL_ADMIN_PERM,
11283                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11284                                   NL80211_FLAG_NEED_RTNL |
11285                                   NL80211_FLAG_CLEAR_SKB,
11286         },
11287         {
11288                 .cmd = NL80211_CMD_TDLS_MGMT,
11289                 .doit = nl80211_tdls_mgmt,
11290                 .policy = nl80211_policy,
11291                 .flags = GENL_ADMIN_PERM,
11292                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11293                                   NL80211_FLAG_NEED_RTNL,
11294         },
11295         {
11296                 .cmd = NL80211_CMD_TDLS_OPER,
11297                 .doit = nl80211_tdls_oper,
11298                 .policy = nl80211_policy,
11299                 .flags = GENL_ADMIN_PERM,
11300                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11301                                   NL80211_FLAG_NEED_RTNL,
11302         },
11303         {
11304                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11305                 .doit = nl80211_register_unexpected_frame,
11306                 .policy = nl80211_policy,
11307                 .flags = GENL_ADMIN_PERM,
11308                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11309                                   NL80211_FLAG_NEED_RTNL,
11310         },
11311         {
11312                 .cmd = NL80211_CMD_PROBE_CLIENT,
11313                 .doit = nl80211_probe_client,
11314                 .policy = nl80211_policy,
11315                 .flags = GENL_ADMIN_PERM,
11316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11317                                   NL80211_FLAG_NEED_RTNL,
11318         },
11319         {
11320                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11321                 .doit = nl80211_register_beacons,
11322                 .policy = nl80211_policy,
11323                 .flags = GENL_ADMIN_PERM,
11324                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11325                                   NL80211_FLAG_NEED_RTNL,
11326         },
11327         {
11328                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11329                 .doit = nl80211_set_noack_map,
11330                 .policy = nl80211_policy,
11331                 .flags = GENL_ADMIN_PERM,
11332                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11333                                   NL80211_FLAG_NEED_RTNL,
11334         },
11335         {
11336                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11337                 .doit = nl80211_start_p2p_device,
11338                 .policy = nl80211_policy,
11339                 .flags = GENL_ADMIN_PERM,
11340                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11341                                   NL80211_FLAG_NEED_RTNL,
11342         },
11343         {
11344                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11345                 .doit = nl80211_stop_p2p_device,
11346                 .policy = nl80211_policy,
11347                 .flags = GENL_ADMIN_PERM,
11348                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11349                                   NL80211_FLAG_NEED_RTNL,
11350         },
11351         {
11352                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11353                 .doit = nl80211_set_mcast_rate,
11354                 .policy = nl80211_policy,
11355                 .flags = GENL_ADMIN_PERM,
11356                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11357                                   NL80211_FLAG_NEED_RTNL,
11358         },
11359         {
11360                 .cmd = NL80211_CMD_SET_MAC_ACL,
11361                 .doit = nl80211_set_mac_acl,
11362                 .policy = nl80211_policy,
11363                 .flags = GENL_ADMIN_PERM,
11364                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11365                                   NL80211_FLAG_NEED_RTNL,
11366         },
11367         {
11368                 .cmd = NL80211_CMD_RADAR_DETECT,
11369                 .doit = nl80211_start_radar_detection,
11370                 .policy = nl80211_policy,
11371                 .flags = GENL_ADMIN_PERM,
11372                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11373                                   NL80211_FLAG_NEED_RTNL,
11374         },
11375         {
11376                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11377                 .doit = nl80211_get_protocol_features,
11378                 .policy = nl80211_policy,
11379         },
11380         {
11381                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11382                 .doit = nl80211_update_ft_ies,
11383                 .policy = nl80211_policy,
11384                 .flags = GENL_ADMIN_PERM,
11385                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11386                                   NL80211_FLAG_NEED_RTNL,
11387         },
11388         {
11389                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11390                 .doit = nl80211_crit_protocol_start,
11391                 .policy = nl80211_policy,
11392                 .flags = GENL_ADMIN_PERM,
11393                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11394                                   NL80211_FLAG_NEED_RTNL,
11395         },
11396         {
11397                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11398                 .doit = nl80211_crit_protocol_stop,
11399                 .policy = nl80211_policy,
11400                 .flags = GENL_ADMIN_PERM,
11401                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11402                                   NL80211_FLAG_NEED_RTNL,
11403         },
11404         {
11405                 .cmd = NL80211_CMD_GET_COALESCE,
11406                 .doit = nl80211_get_coalesce,
11407                 .policy = nl80211_policy,
11408                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11409                                   NL80211_FLAG_NEED_RTNL,
11410         },
11411         {
11412                 .cmd = NL80211_CMD_SET_COALESCE,
11413                 .doit = nl80211_set_coalesce,
11414                 .policy = nl80211_policy,
11415                 .flags = GENL_ADMIN_PERM,
11416                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11417                                   NL80211_FLAG_NEED_RTNL,
11418         },
11419         {
11420                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11421                 .doit = nl80211_channel_switch,
11422                 .policy = nl80211_policy,
11423                 .flags = GENL_ADMIN_PERM,
11424                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11425                                   NL80211_FLAG_NEED_RTNL,
11426         },
11427         {
11428                 .cmd = NL80211_CMD_VENDOR,
11429                 .doit = nl80211_vendor_cmd,
11430                 .dumpit = nl80211_vendor_cmd_dump,
11431                 .policy = nl80211_policy,
11432                 .flags = GENL_ADMIN_PERM,
11433                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11434                                   NL80211_FLAG_NEED_RTNL,
11435         },
11436         {
11437                 .cmd = NL80211_CMD_SET_QOS_MAP,
11438                 .doit = nl80211_set_qos_map,
11439                 .policy = nl80211_policy,
11440                 .flags = GENL_ADMIN_PERM,
11441                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11442                                   NL80211_FLAG_NEED_RTNL,
11443         },
11444         {
11445                 .cmd = NL80211_CMD_ADD_TX_TS,
11446                 .doit = nl80211_add_tx_ts,
11447                 .policy = nl80211_policy,
11448                 .flags = GENL_ADMIN_PERM,
11449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11450                                   NL80211_FLAG_NEED_RTNL,
11451         },
11452         {
11453                 .cmd = NL80211_CMD_DEL_TX_TS,
11454                 .doit = nl80211_del_tx_ts,
11455                 .policy = nl80211_policy,
11456                 .flags = GENL_ADMIN_PERM,
11457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11458                                   NL80211_FLAG_NEED_RTNL,
11459         },
11460         {
11461                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11462                 .doit = nl80211_tdls_channel_switch,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11470                 .doit = nl80211_tdls_cancel_channel_switch,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476 };
11477
11478 /* notification functions */
11479
11480 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11481                           enum nl80211_commands cmd)
11482 {
11483         struct sk_buff *msg;
11484         struct nl80211_dump_wiphy_state state = {};
11485
11486         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11487                 cmd != NL80211_CMD_DEL_WIPHY);
11488
11489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11490         if (!msg)
11491                 return;
11492
11493         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11494                 nlmsg_free(msg);
11495                 return;
11496         }
11497
11498         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11499                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11500 }
11501
11502 static int nl80211_add_scan_req(struct sk_buff *msg,
11503                                 struct cfg80211_registered_device *rdev)
11504 {
11505         struct cfg80211_scan_request *req = rdev->scan_req;
11506         struct nlattr *nest;
11507         int i;
11508
11509         if (WARN_ON(!req))
11510                 return 0;
11511
11512         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11513         if (!nest)
11514                 goto nla_put_failure;
11515         for (i = 0; i < req->n_ssids; i++) {
11516                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11517                         goto nla_put_failure;
11518         }
11519         nla_nest_end(msg, nest);
11520
11521         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11522         if (!nest)
11523                 goto nla_put_failure;
11524         for (i = 0; i < req->n_channels; i++) {
11525                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11526                         goto nla_put_failure;
11527         }
11528         nla_nest_end(msg, nest);
11529
11530         if (req->ie &&
11531             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11532                 goto nla_put_failure;
11533
11534         if (req->flags &&
11535             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11536                 goto nla_put_failure;
11537
11538         return 0;
11539  nla_put_failure:
11540         return -ENOBUFS;
11541 }
11542
11543 static int nl80211_send_scan_msg(struct sk_buff *msg,
11544                                  struct cfg80211_registered_device *rdev,
11545                                  struct wireless_dev *wdev,
11546                                  u32 portid, u32 seq, int flags,
11547                                  u32 cmd)
11548 {
11549         void *hdr;
11550
11551         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11552         if (!hdr)
11553                 return -1;
11554
11555         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11556             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11557                                          wdev->netdev->ifindex)) ||
11558             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11559                 goto nla_put_failure;
11560
11561         /* ignore errors and send incomplete event anyway */
11562         nl80211_add_scan_req(msg, rdev);
11563
11564         genlmsg_end(msg, hdr);
11565         return 0;
11566
11567  nla_put_failure:
11568         genlmsg_cancel(msg, hdr);
11569         return -EMSGSIZE;
11570 }
11571
11572 static int
11573 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11574                             struct cfg80211_registered_device *rdev,
11575                             struct net_device *netdev,
11576                             u32 portid, u32 seq, int flags, u32 cmd)
11577 {
11578         void *hdr;
11579
11580         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11581         if (!hdr)
11582                 return -1;
11583
11584         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11585             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11586                 goto nla_put_failure;
11587
11588         genlmsg_end(msg, hdr);
11589         return 0;
11590
11591  nla_put_failure:
11592         genlmsg_cancel(msg, hdr);
11593         return -EMSGSIZE;
11594 }
11595
11596 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11597                              struct wireless_dev *wdev)
11598 {
11599         struct sk_buff *msg;
11600
11601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11602         if (!msg)
11603                 return;
11604
11605         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11606                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11607                 nlmsg_free(msg);
11608                 return;
11609         }
11610
11611         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11612                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11613 }
11614
11615 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11616                                        struct wireless_dev *wdev, bool aborted)
11617 {
11618         struct sk_buff *msg;
11619
11620         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11621         if (!msg)
11622                 return NULL;
11623
11624         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11625                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11626                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11627                 nlmsg_free(msg);
11628                 return NULL;
11629         }
11630
11631         return msg;
11632 }
11633
11634 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11635                               struct sk_buff *msg)
11636 {
11637         if (!msg)
11638                 return;
11639
11640         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11641                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11642 }
11643
11644 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11645                                      struct net_device *netdev)
11646 {
11647         struct sk_buff *msg;
11648
11649         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11650         if (!msg)
11651                 return;
11652
11653         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11654                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11655                 nlmsg_free(msg);
11656                 return;
11657         }
11658
11659         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11660                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11661 }
11662
11663 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11664                              struct net_device *netdev, u32 cmd)
11665 {
11666         struct sk_buff *msg;
11667
11668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11669         if (!msg)
11670                 return;
11671
11672         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11673                 nlmsg_free(msg);
11674                 return;
11675         }
11676
11677         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11678                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11679 }
11680
11681 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11682                                           struct regulatory_request *request)
11683 {
11684         /* Userspace can always count this one always being set */
11685         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11686                 goto nla_put_failure;
11687
11688         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11689                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11690                                NL80211_REGDOM_TYPE_WORLD))
11691                         goto nla_put_failure;
11692         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11693                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11694                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11695                         goto nla_put_failure;
11696         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11697                    request->intersect) {
11698                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11699                                NL80211_REGDOM_TYPE_INTERSECTION))
11700                         goto nla_put_failure;
11701         } else {
11702                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11703                                NL80211_REGDOM_TYPE_COUNTRY) ||
11704                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11705                                    request->alpha2))
11706                         goto nla_put_failure;
11707         }
11708
11709         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11710                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11711
11712                 if (wiphy &&
11713                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11714                         goto nla_put_failure;
11715
11716                 if (wiphy &&
11717                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11718                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11719                         goto nla_put_failure;
11720         }
11721
11722         return true;
11723
11724 nla_put_failure:
11725         return false;
11726 }
11727
11728 /*
11729  * This can happen on global regulatory changes or device specific settings
11730  * based on custom regulatory domains.
11731  */
11732 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11733                                      struct regulatory_request *request)
11734 {
11735         struct sk_buff *msg;
11736         void *hdr;
11737
11738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11739         if (!msg)
11740                 return;
11741
11742         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11743         if (!hdr) {
11744                 nlmsg_free(msg);
11745                 return;
11746         }
11747
11748         if (nl80211_reg_change_event_fill(msg, request) == false)
11749                 goto nla_put_failure;
11750
11751         genlmsg_end(msg, hdr);
11752
11753         rcu_read_lock();
11754         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11755                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11756         rcu_read_unlock();
11757
11758         return;
11759
11760 nla_put_failure:
11761         genlmsg_cancel(msg, hdr);
11762         nlmsg_free(msg);
11763 }
11764
11765 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11766                                     struct net_device *netdev,
11767                                     const u8 *buf, size_t len,
11768                                     enum nl80211_commands cmd, gfp_t gfp,
11769                                     int uapsd_queues)
11770 {
11771         struct sk_buff *msg;
11772         void *hdr;
11773
11774         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11775         if (!msg)
11776                 return;
11777
11778         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11779         if (!hdr) {
11780                 nlmsg_free(msg);
11781                 return;
11782         }
11783
11784         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11785             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11786             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11787                 goto nla_put_failure;
11788
11789         if (uapsd_queues >= 0) {
11790                 struct nlattr *nla_wmm =
11791                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11792                 if (!nla_wmm)
11793                         goto nla_put_failure;
11794
11795                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11796                                uapsd_queues))
11797                         goto nla_put_failure;
11798
11799                 nla_nest_end(msg, nla_wmm);
11800         }
11801
11802         genlmsg_end(msg, hdr);
11803
11804         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11805                                 NL80211_MCGRP_MLME, gfp);
11806         return;
11807
11808  nla_put_failure:
11809         genlmsg_cancel(msg, hdr);
11810         nlmsg_free(msg);
11811 }
11812
11813 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11814                           struct net_device *netdev, const u8 *buf,
11815                           size_t len, gfp_t gfp)
11816 {
11817         nl80211_send_mlme_event(rdev, netdev, buf, len,
11818                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11819 }
11820
11821 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11822                            struct net_device *netdev, const u8 *buf,
11823                            size_t len, gfp_t gfp, int uapsd_queues)
11824 {
11825         nl80211_send_mlme_event(rdev, netdev, buf, len,
11826                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11827 }
11828
11829 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11830                          struct net_device *netdev, const u8 *buf,
11831                          size_t len, gfp_t gfp)
11832 {
11833         nl80211_send_mlme_event(rdev, netdev, buf, len,
11834                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11835 }
11836
11837 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11838                            struct net_device *netdev, const u8 *buf,
11839                            size_t len, gfp_t gfp)
11840 {
11841         nl80211_send_mlme_event(rdev, netdev, buf, len,
11842                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11843 }
11844
11845 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11846                                   size_t len)
11847 {
11848         struct wireless_dev *wdev = dev->ieee80211_ptr;
11849         struct wiphy *wiphy = wdev->wiphy;
11850         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11851         const struct ieee80211_mgmt *mgmt = (void *)buf;
11852         u32 cmd;
11853
11854         if (WARN_ON(len < 2))
11855                 return;
11856
11857         if (ieee80211_is_deauth(mgmt->frame_control))
11858                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11859         else
11860                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11861
11862         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11863         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11864 }
11865 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11866
11867 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11868                                       struct net_device *netdev, int cmd,
11869                                       const u8 *addr, gfp_t gfp)
11870 {
11871         struct sk_buff *msg;
11872         void *hdr;
11873
11874         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11875         if (!msg)
11876                 return;
11877
11878         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11879         if (!hdr) {
11880                 nlmsg_free(msg);
11881                 return;
11882         }
11883
11884         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11885             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11886             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11887             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11888                 goto nla_put_failure;
11889
11890         genlmsg_end(msg, hdr);
11891
11892         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11893                                 NL80211_MCGRP_MLME, gfp);
11894         return;
11895
11896  nla_put_failure:
11897         genlmsg_cancel(msg, hdr);
11898         nlmsg_free(msg);
11899 }
11900
11901 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11902                                struct net_device *netdev, const u8 *addr,
11903                                gfp_t gfp)
11904 {
11905         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11906                                   addr, gfp);
11907 }
11908
11909 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11910                                 struct net_device *netdev, const u8 *addr,
11911                                 gfp_t gfp)
11912 {
11913         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11914                                   addr, gfp);
11915 }
11916
11917 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11918                                  struct net_device *netdev, const u8 *bssid,
11919                                  const u8 *req_ie, size_t req_ie_len,
11920                                  const u8 *resp_ie, size_t resp_ie_len,
11921                                  u16 status, gfp_t gfp)
11922 {
11923         struct sk_buff *msg;
11924         void *hdr;
11925
11926         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11927         if (!msg)
11928                 return;
11929
11930         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11931         if (!hdr) {
11932                 nlmsg_free(msg);
11933                 return;
11934         }
11935
11936         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11937             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11938             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11939             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11940             (req_ie &&
11941              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11942             (resp_ie &&
11943              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11944                 goto nla_put_failure;
11945
11946         genlmsg_end(msg, hdr);
11947
11948         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11949                                 NL80211_MCGRP_MLME, gfp);
11950         return;
11951
11952  nla_put_failure:
11953         genlmsg_cancel(msg, hdr);
11954         nlmsg_free(msg);
11955
11956 }
11957
11958 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11959                          struct net_device *netdev, const u8 *bssid,
11960                          const u8 *req_ie, size_t req_ie_len,
11961                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11962 {
11963         struct sk_buff *msg;
11964         void *hdr;
11965
11966         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11967         if (!msg)
11968                 return;
11969
11970         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11971         if (!hdr) {
11972                 nlmsg_free(msg);
11973                 return;
11974         }
11975
11976         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11977             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11978             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11979             (req_ie &&
11980              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11981             (resp_ie &&
11982              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11983                 goto nla_put_failure;
11984
11985         genlmsg_end(msg, hdr);
11986
11987         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11988                                 NL80211_MCGRP_MLME, gfp);
11989         return;
11990
11991  nla_put_failure:
11992         genlmsg_cancel(msg, hdr);
11993         nlmsg_free(msg);
11994
11995 }
11996
11997 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11998                                struct net_device *netdev, u16 reason,
11999                                const u8 *ie, size_t ie_len, bool from_ap)
12000 {
12001         struct sk_buff *msg;
12002         void *hdr;
12003
12004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12005         if (!msg)
12006                 return;
12007
12008         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12009         if (!hdr) {
12010                 nlmsg_free(msg);
12011                 return;
12012         }
12013
12014         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12015             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12016             (from_ap && reason &&
12017              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12018             (from_ap &&
12019              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12020             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12021                 goto nla_put_failure;
12022
12023         genlmsg_end(msg, hdr);
12024
12025         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12026                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12027         return;
12028
12029  nla_put_failure:
12030         genlmsg_cancel(msg, hdr);
12031         nlmsg_free(msg);
12032
12033 }
12034
12035 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12036                              struct net_device *netdev, const u8 *bssid,
12037                              gfp_t gfp)
12038 {
12039         struct sk_buff *msg;
12040         void *hdr;
12041
12042         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12043         if (!msg)
12044                 return;
12045
12046         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12047         if (!hdr) {
12048                 nlmsg_free(msg);
12049                 return;
12050         }
12051
12052         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12053             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12054             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12055                 goto nla_put_failure;
12056
12057         genlmsg_end(msg, hdr);
12058
12059         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12060                                 NL80211_MCGRP_MLME, gfp);
12061         return;
12062
12063  nla_put_failure:
12064         genlmsg_cancel(msg, hdr);
12065         nlmsg_free(msg);
12066 }
12067
12068 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12069                                         const u8* ie, u8 ie_len, gfp_t gfp)
12070 {
12071         struct wireless_dev *wdev = dev->ieee80211_ptr;
12072         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12073         struct sk_buff *msg;
12074         void *hdr;
12075
12076         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12077                 return;
12078
12079         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12080
12081         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12082         if (!msg)
12083                 return;
12084
12085         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12086         if (!hdr) {
12087                 nlmsg_free(msg);
12088                 return;
12089         }
12090
12091         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12092             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12093             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12094             (ie_len && ie &&
12095              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12096                 goto nla_put_failure;
12097
12098         genlmsg_end(msg, hdr);
12099
12100         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12101                                 NL80211_MCGRP_MLME, gfp);
12102         return;
12103
12104  nla_put_failure:
12105         genlmsg_cancel(msg, hdr);
12106         nlmsg_free(msg);
12107 }
12108 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12109
12110 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12111                                  struct net_device *netdev, const u8 *addr,
12112                                  enum nl80211_key_type key_type, int key_id,
12113                                  const u8 *tsc, gfp_t gfp)
12114 {
12115         struct sk_buff *msg;
12116         void *hdr;
12117
12118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12119         if (!msg)
12120                 return;
12121
12122         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12123         if (!hdr) {
12124                 nlmsg_free(msg);
12125                 return;
12126         }
12127
12128         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12129             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12130             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12131             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12132             (key_id != -1 &&
12133              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12134             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12135                 goto nla_put_failure;
12136
12137         genlmsg_end(msg, hdr);
12138
12139         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12140                                 NL80211_MCGRP_MLME, gfp);
12141         return;
12142
12143  nla_put_failure:
12144         genlmsg_cancel(msg, hdr);
12145         nlmsg_free(msg);
12146 }
12147
12148 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12149                                     struct ieee80211_channel *channel_before,
12150                                     struct ieee80211_channel *channel_after)
12151 {
12152         struct sk_buff *msg;
12153         void *hdr;
12154         struct nlattr *nl_freq;
12155
12156         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12157         if (!msg)
12158                 return;
12159
12160         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12161         if (!hdr) {
12162                 nlmsg_free(msg);
12163                 return;
12164         }
12165
12166         /*
12167          * Since we are applying the beacon hint to a wiphy we know its
12168          * wiphy_idx is valid
12169          */
12170         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12171                 goto nla_put_failure;
12172
12173         /* Before */
12174         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12175         if (!nl_freq)
12176                 goto nla_put_failure;
12177         if (nl80211_msg_put_channel(msg, channel_before, false))
12178                 goto nla_put_failure;
12179         nla_nest_end(msg, nl_freq);
12180
12181         /* After */
12182         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12183         if (!nl_freq)
12184                 goto nla_put_failure;
12185         if (nl80211_msg_put_channel(msg, channel_after, false))
12186                 goto nla_put_failure;
12187         nla_nest_end(msg, nl_freq);
12188
12189         genlmsg_end(msg, hdr);
12190
12191         rcu_read_lock();
12192         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12193                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12194         rcu_read_unlock();
12195
12196         return;
12197
12198 nla_put_failure:
12199         genlmsg_cancel(msg, hdr);
12200         nlmsg_free(msg);
12201 }
12202
12203 static void nl80211_send_remain_on_chan_event(
12204         int cmd, struct cfg80211_registered_device *rdev,
12205         struct wireless_dev *wdev, u64 cookie,
12206         struct ieee80211_channel *chan,
12207         unsigned int duration, gfp_t gfp)
12208 {
12209         struct sk_buff *msg;
12210         void *hdr;
12211
12212         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12213         if (!msg)
12214                 return;
12215
12216         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12217         if (!hdr) {
12218                 nlmsg_free(msg);
12219                 return;
12220         }
12221
12222         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12223             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12224                                          wdev->netdev->ifindex)) ||
12225             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12226             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12227             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12228                         NL80211_CHAN_NO_HT) ||
12229             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12230                 goto nla_put_failure;
12231
12232         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12233             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12234                 goto nla_put_failure;
12235
12236         genlmsg_end(msg, hdr);
12237
12238         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12239                                 NL80211_MCGRP_MLME, gfp);
12240         return;
12241
12242  nla_put_failure:
12243         genlmsg_cancel(msg, hdr);
12244         nlmsg_free(msg);
12245 }
12246
12247 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12248                                struct ieee80211_channel *chan,
12249                                unsigned int duration, gfp_t gfp)
12250 {
12251         struct wiphy *wiphy = wdev->wiphy;
12252         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12253
12254         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12255         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12256                                           rdev, wdev, cookie, chan,
12257                                           duration, gfp);
12258 }
12259 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12260
12261 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12262                                         struct ieee80211_channel *chan,
12263                                         gfp_t gfp)
12264 {
12265         struct wiphy *wiphy = wdev->wiphy;
12266         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12267
12268         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12269         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12270                                           rdev, wdev, cookie, chan, 0, gfp);
12271 }
12272 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12273
12274 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12275                       struct station_info *sinfo, gfp_t gfp)
12276 {
12277         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12278         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12279         struct sk_buff *msg;
12280
12281         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12282
12283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12284         if (!msg)
12285                 return;
12286
12287         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12288                                  rdev, dev, mac_addr, sinfo) < 0) {
12289                 nlmsg_free(msg);
12290                 return;
12291         }
12292
12293         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12294                                 NL80211_MCGRP_MLME, gfp);
12295 }
12296 EXPORT_SYMBOL(cfg80211_new_sta);
12297
12298 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12299                             struct station_info *sinfo, gfp_t gfp)
12300 {
12301         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12302         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12303         struct sk_buff *msg;
12304         struct station_info empty_sinfo = {};
12305
12306         if (!sinfo)
12307                 sinfo = &empty_sinfo;
12308
12309         trace_cfg80211_del_sta(dev, mac_addr);
12310
12311         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12312         if (!msg)
12313                 return;
12314
12315         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12316                                  rdev, dev, mac_addr, sinfo) < 0) {
12317                 nlmsg_free(msg);
12318                 return;
12319         }
12320
12321         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12322                                 NL80211_MCGRP_MLME, gfp);
12323 }
12324 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12325
12326 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12327                           enum nl80211_connect_failed_reason reason,
12328                           gfp_t gfp)
12329 {
12330         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12331         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12332         struct sk_buff *msg;
12333         void *hdr;
12334
12335         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12336         if (!msg)
12337                 return;
12338
12339         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12340         if (!hdr) {
12341                 nlmsg_free(msg);
12342                 return;
12343         }
12344
12345         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12346             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12347             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12348                 goto nla_put_failure;
12349
12350         genlmsg_end(msg, hdr);
12351
12352         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12353                                 NL80211_MCGRP_MLME, gfp);
12354         return;
12355
12356  nla_put_failure:
12357         genlmsg_cancel(msg, hdr);
12358         nlmsg_free(msg);
12359 }
12360 EXPORT_SYMBOL(cfg80211_conn_failed);
12361
12362 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12363                                        const u8 *addr, gfp_t gfp)
12364 {
12365         struct wireless_dev *wdev = dev->ieee80211_ptr;
12366         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12367         struct sk_buff *msg;
12368         void *hdr;
12369         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12370
12371         if (!nlportid)
12372                 return false;
12373
12374         msg = nlmsg_new(100, gfp);
12375         if (!msg)
12376                 return true;
12377
12378         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12379         if (!hdr) {
12380                 nlmsg_free(msg);
12381                 return true;
12382         }
12383
12384         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12385             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12386             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12387                 goto nla_put_failure;
12388
12389         genlmsg_end(msg, hdr);
12390         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12391         return true;
12392
12393  nla_put_failure:
12394         genlmsg_cancel(msg, hdr);
12395         nlmsg_free(msg);
12396         return true;
12397 }
12398
12399 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12400                                 const u8 *addr, gfp_t gfp)
12401 {
12402         struct wireless_dev *wdev = dev->ieee80211_ptr;
12403         bool ret;
12404
12405         trace_cfg80211_rx_spurious_frame(dev, addr);
12406
12407         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12408                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12409                 trace_cfg80211_return_bool(false);
12410                 return false;
12411         }
12412         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12413                                          addr, gfp);
12414         trace_cfg80211_return_bool(ret);
12415         return ret;
12416 }
12417 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12418
12419 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12420                                         const u8 *addr, gfp_t gfp)
12421 {
12422         struct wireless_dev *wdev = dev->ieee80211_ptr;
12423         bool ret;
12424
12425         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12426
12427         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12428                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12429                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12430                 trace_cfg80211_return_bool(false);
12431                 return false;
12432         }
12433         ret = __nl80211_unexpected_frame(dev,
12434                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12435                                          addr, gfp);
12436         trace_cfg80211_return_bool(ret);
12437         return ret;
12438 }
12439 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12440
12441 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12442                       struct wireless_dev *wdev, u32 nlportid,
12443                       int freq, int sig_dbm,
12444                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12445 {
12446         struct net_device *netdev = wdev->netdev;
12447         struct sk_buff *msg;
12448         void *hdr;
12449
12450         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12451         if (!msg)
12452                 return -ENOMEM;
12453
12454         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12455         if (!hdr) {
12456                 nlmsg_free(msg);
12457                 return -ENOMEM;
12458         }
12459
12460         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12461             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12462                                         netdev->ifindex)) ||
12463             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12464             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12465             (sig_dbm &&
12466              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12467             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12468             (flags &&
12469              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12470                 goto nla_put_failure;
12471
12472         genlmsg_end(msg, hdr);
12473
12474         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12475
12476  nla_put_failure:
12477         genlmsg_cancel(msg, hdr);
12478         nlmsg_free(msg);
12479         return -ENOBUFS;
12480 }
12481
12482 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12483                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12484 {
12485         struct wiphy *wiphy = wdev->wiphy;
12486         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12487         struct net_device *netdev = wdev->netdev;
12488         struct sk_buff *msg;
12489         void *hdr;
12490
12491         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12492
12493         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12494         if (!msg)
12495                 return;
12496
12497         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12498         if (!hdr) {
12499                 nlmsg_free(msg);
12500                 return;
12501         }
12502
12503         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12504             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12505                                    netdev->ifindex)) ||
12506             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12507             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12508             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12509             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12510                 goto nla_put_failure;
12511
12512         genlmsg_end(msg, hdr);
12513
12514         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12515                                 NL80211_MCGRP_MLME, gfp);
12516         return;
12517
12518  nla_put_failure:
12519         genlmsg_cancel(msg, hdr);
12520         nlmsg_free(msg);
12521 }
12522 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12523
12524 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12525                                             const char *mac, gfp_t gfp)
12526 {
12527         struct wireless_dev *wdev = dev->ieee80211_ptr;
12528         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12529         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12530         void **cb;
12531
12532         if (!msg)
12533                 return NULL;
12534
12535         cb = (void **)msg->cb;
12536
12537         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12538         if (!cb[0]) {
12539                 nlmsg_free(msg);
12540                 return NULL;
12541         }
12542
12543         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12544             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12545                 goto nla_put_failure;
12546
12547         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12548                 goto nla_put_failure;
12549
12550         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12551         if (!cb[1])
12552                 goto nla_put_failure;
12553
12554         cb[2] = rdev;
12555
12556         return msg;
12557  nla_put_failure:
12558         nlmsg_free(msg);
12559         return NULL;
12560 }
12561
12562 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12563 {
12564         void **cb = (void **)msg->cb;
12565         struct cfg80211_registered_device *rdev = cb[2];
12566
12567         nla_nest_end(msg, cb[1]);
12568         genlmsg_end(msg, cb[0]);
12569
12570         memset(msg->cb, 0, sizeof(msg->cb));
12571
12572         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12573                                 NL80211_MCGRP_MLME, gfp);
12574 }
12575
12576 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12577                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12578                               gfp_t gfp)
12579 {
12580         struct sk_buff *msg;
12581
12582         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12583
12584         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12585                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12586                 return;
12587
12588         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12589         if (!msg)
12590                 return;
12591
12592         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12593                         rssi_event))
12594                 goto nla_put_failure;
12595
12596         cfg80211_send_cqm(msg, gfp);
12597
12598         return;
12599
12600  nla_put_failure:
12601         nlmsg_free(msg);
12602 }
12603 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12604
12605 void cfg80211_cqm_txe_notify(struct net_device *dev,
12606                              const u8 *peer, u32 num_packets,
12607                              u32 rate, u32 intvl, gfp_t gfp)
12608 {
12609         struct sk_buff *msg;
12610
12611         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12612         if (!msg)
12613                 return;
12614
12615         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12616                 goto nla_put_failure;
12617
12618         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12619                 goto nla_put_failure;
12620
12621         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12622                 goto nla_put_failure;
12623
12624         cfg80211_send_cqm(msg, gfp);
12625         return;
12626
12627  nla_put_failure:
12628         nlmsg_free(msg);
12629 }
12630 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12631
12632 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12633                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12634 {
12635         struct sk_buff *msg;
12636
12637         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12638
12639         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12640         if (!msg)
12641                 return;
12642
12643         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12644                 goto nla_put_failure;
12645
12646         cfg80211_send_cqm(msg, gfp);
12647         return;
12648
12649  nla_put_failure:
12650         nlmsg_free(msg);
12651 }
12652 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12653
12654 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12655 {
12656         struct sk_buff *msg;
12657
12658         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12659         if (!msg)
12660                 return;
12661
12662         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12663                 goto nla_put_failure;
12664
12665         cfg80211_send_cqm(msg, gfp);
12666         return;
12667
12668  nla_put_failure:
12669         nlmsg_free(msg);
12670 }
12671 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12672
12673 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12674                                      struct net_device *netdev, const u8 *bssid,
12675                                      const u8 *replay_ctr, gfp_t gfp)
12676 {
12677         struct sk_buff *msg;
12678         struct nlattr *rekey_attr;
12679         void *hdr;
12680
12681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12682         if (!msg)
12683                 return;
12684
12685         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12686         if (!hdr) {
12687                 nlmsg_free(msg);
12688                 return;
12689         }
12690
12691         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12692             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12693             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12694                 goto nla_put_failure;
12695
12696         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12697         if (!rekey_attr)
12698                 goto nla_put_failure;
12699
12700         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12701                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12702                 goto nla_put_failure;
12703
12704         nla_nest_end(msg, rekey_attr);
12705
12706         genlmsg_end(msg, hdr);
12707
12708         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12709                                 NL80211_MCGRP_MLME, gfp);
12710         return;
12711
12712  nla_put_failure:
12713         genlmsg_cancel(msg, hdr);
12714         nlmsg_free(msg);
12715 }
12716
12717 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12718                                const u8 *replay_ctr, gfp_t gfp)
12719 {
12720         struct wireless_dev *wdev = dev->ieee80211_ptr;
12721         struct wiphy *wiphy = wdev->wiphy;
12722         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12723
12724         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12725         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12726 }
12727 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12728
12729 static void
12730 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12731                                struct net_device *netdev, int index,
12732                                const u8 *bssid, bool preauth, gfp_t gfp)
12733 {
12734         struct sk_buff *msg;
12735         struct nlattr *attr;
12736         void *hdr;
12737
12738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12739         if (!msg)
12740                 return;
12741
12742         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12743         if (!hdr) {
12744                 nlmsg_free(msg);
12745                 return;
12746         }
12747
12748         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12749             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12750                 goto nla_put_failure;
12751
12752         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12753         if (!attr)
12754                 goto nla_put_failure;
12755
12756         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12757             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12758             (preauth &&
12759              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12760                 goto nla_put_failure;
12761
12762         nla_nest_end(msg, attr);
12763
12764         genlmsg_end(msg, hdr);
12765
12766         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12767                                 NL80211_MCGRP_MLME, gfp);
12768         return;
12769
12770  nla_put_failure:
12771         genlmsg_cancel(msg, hdr);
12772         nlmsg_free(msg);
12773 }
12774
12775 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12776                                      const u8 *bssid, bool preauth, gfp_t gfp)
12777 {
12778         struct wireless_dev *wdev = dev->ieee80211_ptr;
12779         struct wiphy *wiphy = wdev->wiphy;
12780         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12781
12782         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12783         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12784 }
12785 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12786
12787 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12788                                      struct net_device *netdev,
12789                                      struct cfg80211_chan_def *chandef,
12790                                      gfp_t gfp,
12791                                      enum nl80211_commands notif,
12792                                      u8 count)
12793 {
12794         struct sk_buff *msg;
12795         void *hdr;
12796
12797         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12798         if (!msg)
12799                 return;
12800
12801         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12802         if (!hdr) {
12803                 nlmsg_free(msg);
12804                 return;
12805         }
12806
12807         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12808                 goto nla_put_failure;
12809
12810         if (nl80211_send_chandef(msg, chandef))
12811                 goto nla_put_failure;
12812
12813         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12814             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12815                         goto nla_put_failure;
12816
12817         genlmsg_end(msg, hdr);
12818
12819         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12820                                 NL80211_MCGRP_MLME, gfp);
12821         return;
12822
12823  nla_put_failure:
12824         genlmsg_cancel(msg, hdr);
12825         nlmsg_free(msg);
12826 }
12827
12828 void cfg80211_ch_switch_notify(struct net_device *dev,
12829                                struct cfg80211_chan_def *chandef)
12830 {
12831         struct wireless_dev *wdev = dev->ieee80211_ptr;
12832         struct wiphy *wiphy = wdev->wiphy;
12833         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12834
12835         ASSERT_WDEV_LOCK(wdev);
12836
12837         trace_cfg80211_ch_switch_notify(dev, chandef);
12838
12839         wdev->chandef = *chandef;
12840         wdev->preset_chandef = *chandef;
12841         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12842                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12843 }
12844 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12845
12846 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12847                                        struct cfg80211_chan_def *chandef,
12848                                        u8 count)
12849 {
12850         struct wireless_dev *wdev = dev->ieee80211_ptr;
12851         struct wiphy *wiphy = wdev->wiphy;
12852         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12853
12854         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12855
12856         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12857                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12858 }
12859 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12860
12861 void
12862 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12863                      const struct cfg80211_chan_def *chandef,
12864                      enum nl80211_radar_event event,
12865                      struct net_device *netdev, gfp_t gfp)
12866 {
12867         struct sk_buff *msg;
12868         void *hdr;
12869
12870         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12871         if (!msg)
12872                 return;
12873
12874         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12875         if (!hdr) {
12876                 nlmsg_free(msg);
12877                 return;
12878         }
12879
12880         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12881                 goto nla_put_failure;
12882
12883         /* NOP and radar events don't need a netdev parameter */
12884         if (netdev) {
12885                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12886
12887                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12888                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12889                         goto nla_put_failure;
12890         }
12891
12892         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12893                 goto nla_put_failure;
12894
12895         if (nl80211_send_chandef(msg, chandef))
12896                 goto nla_put_failure;
12897
12898         genlmsg_end(msg, hdr);
12899
12900         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12901                                 NL80211_MCGRP_MLME, gfp);
12902         return;
12903
12904  nla_put_failure:
12905         genlmsg_cancel(msg, hdr);
12906         nlmsg_free(msg);
12907 }
12908
12909 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12910                            u64 cookie, bool acked, gfp_t gfp)
12911 {
12912         struct wireless_dev *wdev = dev->ieee80211_ptr;
12913         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12914         struct sk_buff *msg;
12915         void *hdr;
12916
12917         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12918
12919         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12920
12921         if (!msg)
12922                 return;
12923
12924         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12925         if (!hdr) {
12926                 nlmsg_free(msg);
12927                 return;
12928         }
12929
12930         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12931             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12932             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12933             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12934             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12935                 goto nla_put_failure;
12936
12937         genlmsg_end(msg, hdr);
12938
12939         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12940                                 NL80211_MCGRP_MLME, gfp);
12941         return;
12942
12943  nla_put_failure:
12944         genlmsg_cancel(msg, hdr);
12945         nlmsg_free(msg);
12946 }
12947 EXPORT_SYMBOL(cfg80211_probe_status);
12948
12949 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12950                                  const u8 *frame, size_t len,
12951                                  int freq, int sig_dbm)
12952 {
12953         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12954         struct sk_buff *msg;
12955         void *hdr;
12956         struct cfg80211_beacon_registration *reg;
12957
12958         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12959
12960         spin_lock_bh(&rdev->beacon_registrations_lock);
12961         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12962                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12963                 if (!msg) {
12964                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12965                         return;
12966                 }
12967
12968                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12969                 if (!hdr)
12970                         goto nla_put_failure;
12971
12972                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12973                     (freq &&
12974                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12975                     (sig_dbm &&
12976                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12977                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12978                         goto nla_put_failure;
12979
12980                 genlmsg_end(msg, hdr);
12981
12982                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12983         }
12984         spin_unlock_bh(&rdev->beacon_registrations_lock);
12985         return;
12986
12987  nla_put_failure:
12988         spin_unlock_bh(&rdev->beacon_registrations_lock);
12989         if (hdr)
12990                 genlmsg_cancel(msg, hdr);
12991         nlmsg_free(msg);
12992 }
12993 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12994
12995 #ifdef CONFIG_PM
12996 static int cfg80211_net_detect_results(struct sk_buff *msg,
12997                                        struct cfg80211_wowlan_wakeup *wakeup)
12998 {
12999         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13000         struct nlattr *nl_results, *nl_match, *nl_freqs;
13001         int i, j;
13002
13003         nl_results = nla_nest_start(
13004                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13005         if (!nl_results)
13006                 return -EMSGSIZE;
13007
13008         for (i = 0; i < nd->n_matches; i++) {
13009                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13010
13011                 nl_match = nla_nest_start(msg, i);
13012                 if (!nl_match)
13013                         break;
13014
13015                 /* The SSID attribute is optional in nl80211, but for
13016                  * simplicity reasons it's always present in the
13017                  * cfg80211 structure.  If a driver can't pass the
13018                  * SSID, that needs to be changed.  A zero length SSID
13019                  * is still a valid SSID (wildcard), so it cannot be
13020                  * used for this purpose.
13021                  */
13022                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13023                             match->ssid.ssid)) {
13024                         nla_nest_cancel(msg, nl_match);
13025                         goto out;
13026                 }
13027
13028                 if (match->n_channels) {
13029                         nl_freqs = nla_nest_start(
13030                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13031                         if (!nl_freqs) {
13032                                 nla_nest_cancel(msg, nl_match);
13033                                 goto out;
13034                         }
13035
13036                         for (j = 0; j < match->n_channels; j++) {
13037                                 if (nla_put_u32(msg, j, match->channels[j])) {
13038                                         nla_nest_cancel(msg, nl_freqs);
13039                                         nla_nest_cancel(msg, nl_match);
13040                                         goto out;
13041                                 }
13042                         }
13043
13044                         nla_nest_end(msg, nl_freqs);
13045                 }
13046
13047                 nla_nest_end(msg, nl_match);
13048         }
13049
13050 out:
13051         nla_nest_end(msg, nl_results);
13052         return 0;
13053 }
13054
13055 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13056                                    struct cfg80211_wowlan_wakeup *wakeup,
13057                                    gfp_t gfp)
13058 {
13059         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13060         struct sk_buff *msg;
13061         void *hdr;
13062         int size = 200;
13063
13064         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13065
13066         if (wakeup)
13067                 size += wakeup->packet_present_len;
13068
13069         msg = nlmsg_new(size, gfp);
13070         if (!msg)
13071                 return;
13072
13073         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13074         if (!hdr)
13075                 goto free_msg;
13076
13077         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13078             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13079                 goto free_msg;
13080
13081         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13082                                         wdev->netdev->ifindex))
13083                 goto free_msg;
13084
13085         if (wakeup) {
13086                 struct nlattr *reasons;
13087
13088                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13089                 if (!reasons)
13090                         goto free_msg;
13091
13092                 if (wakeup->disconnect &&
13093                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13094                         goto free_msg;
13095                 if (wakeup->magic_pkt &&
13096                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13097                         goto free_msg;
13098                 if (wakeup->gtk_rekey_failure &&
13099                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13100                         goto free_msg;
13101                 if (wakeup->eap_identity_req &&
13102                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13103                         goto free_msg;
13104                 if (wakeup->four_way_handshake &&
13105                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13106                         goto free_msg;
13107                 if (wakeup->rfkill_release &&
13108                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13109                         goto free_msg;
13110
13111                 if (wakeup->pattern_idx >= 0 &&
13112                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13113                                 wakeup->pattern_idx))
13114                         goto free_msg;
13115
13116                 if (wakeup->tcp_match &&
13117                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13118                         goto free_msg;
13119
13120                 if (wakeup->tcp_connlost &&
13121                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13122                         goto free_msg;
13123
13124                 if (wakeup->tcp_nomoretokens &&
13125                     nla_put_flag(msg,
13126                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13127                         goto free_msg;
13128
13129                 if (wakeup->packet) {
13130                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13131                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13132
13133                         if (!wakeup->packet_80211) {
13134                                 pkt_attr =
13135                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13136                                 len_attr =
13137                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13138                         }
13139
13140                         if (wakeup->packet_len &&
13141                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13142                                 goto free_msg;
13143
13144                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13145                                     wakeup->packet))
13146                                 goto free_msg;
13147                 }
13148
13149                 if (wakeup->net_detect &&
13150                     cfg80211_net_detect_results(msg, wakeup))
13151                                 goto free_msg;
13152
13153                 nla_nest_end(msg, reasons);
13154         }
13155
13156         genlmsg_end(msg, hdr);
13157
13158         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13159                                 NL80211_MCGRP_MLME, gfp);
13160         return;
13161
13162  free_msg:
13163         nlmsg_free(msg);
13164 }
13165 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13166 #endif
13167
13168 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13169                                 enum nl80211_tdls_operation oper,
13170                                 u16 reason_code, gfp_t gfp)
13171 {
13172         struct wireless_dev *wdev = dev->ieee80211_ptr;
13173         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13174         struct sk_buff *msg;
13175         void *hdr;
13176
13177         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13178                                          reason_code);
13179
13180         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13181         if (!msg)
13182                 return;
13183
13184         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13185         if (!hdr) {
13186                 nlmsg_free(msg);
13187                 return;
13188         }
13189
13190         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13191             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13192             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13193             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13194             (reason_code > 0 &&
13195              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13196                 goto nla_put_failure;
13197
13198         genlmsg_end(msg, hdr);
13199
13200         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13201                                 NL80211_MCGRP_MLME, gfp);
13202         return;
13203
13204  nla_put_failure:
13205         genlmsg_cancel(msg, hdr);
13206         nlmsg_free(msg);
13207 }
13208 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13209
13210 static int nl80211_netlink_notify(struct notifier_block * nb,
13211                                   unsigned long state,
13212                                   void *_notify)
13213 {
13214         struct netlink_notify *notify = _notify;
13215         struct cfg80211_registered_device *rdev;
13216         struct wireless_dev *wdev;
13217         struct cfg80211_beacon_registration *reg, *tmp;
13218
13219         if (state != NETLINK_URELEASE)
13220                 return NOTIFY_DONE;
13221
13222         rcu_read_lock();
13223
13224         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13225                 bool schedule_destroy_work = false;
13226                 bool schedule_scan_stop = false;
13227                 struct cfg80211_sched_scan_request *sched_scan_req =
13228                         rcu_dereference(rdev->sched_scan_req);
13229
13230                 if (sched_scan_req && notify->portid &&
13231                     sched_scan_req->owner_nlportid == notify->portid)
13232                         schedule_scan_stop = true;
13233
13234                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13235                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13236
13237                         if (wdev->owner_nlportid == notify->portid)
13238                                 schedule_destroy_work = true;
13239                 }
13240
13241                 spin_lock_bh(&rdev->beacon_registrations_lock);
13242                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13243                                          list) {
13244                         if (reg->nlportid == notify->portid) {
13245                                 list_del(&reg->list);
13246                                 kfree(reg);
13247                                 break;
13248                         }
13249                 }
13250                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13251
13252                 if (schedule_destroy_work) {
13253                         struct cfg80211_iface_destroy *destroy;
13254
13255                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13256                         if (destroy) {
13257                                 destroy->nlportid = notify->portid;
13258                                 spin_lock(&rdev->destroy_list_lock);
13259                                 list_add(&destroy->list, &rdev->destroy_list);
13260                                 spin_unlock(&rdev->destroy_list_lock);
13261                                 schedule_work(&rdev->destroy_work);
13262                         }
13263                 } else if (schedule_scan_stop) {
13264                         sched_scan_req->owner_nlportid = 0;
13265
13266                         if (rdev->ops->sched_scan_stop &&
13267                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13268                                 schedule_work(&rdev->sched_scan_stop_wk);
13269                 }
13270         }
13271
13272         rcu_read_unlock();
13273
13274         /*
13275          * It is possible that the user space process that is controlling the
13276          * indoor setting disappeared, so notify the regulatory core.
13277          */
13278         regulatory_netlink_notify(notify->portid);
13279         return NOTIFY_OK;
13280 }
13281
13282 static struct notifier_block nl80211_netlink_notifier = {
13283         .notifier_call = nl80211_netlink_notify,
13284 };
13285
13286 void cfg80211_ft_event(struct net_device *netdev,
13287                        struct cfg80211_ft_event_params *ft_event)
13288 {
13289         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13290         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13291         struct sk_buff *msg;
13292         void *hdr;
13293
13294         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13295
13296         if (!ft_event->target_ap)
13297                 return;
13298
13299         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13300         if (!msg)
13301                 return;
13302
13303         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13304         if (!hdr)
13305                 goto out;
13306
13307         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13308             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13309             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13310                 goto out;
13311
13312         if (ft_event->ies &&
13313             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13314                 goto out;
13315         if (ft_event->ric_ies &&
13316             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13317                     ft_event->ric_ies))
13318                 goto out;
13319
13320         genlmsg_end(msg, hdr);
13321
13322         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13323                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13324         return;
13325  out:
13326         nlmsg_free(msg);
13327 }
13328 EXPORT_SYMBOL(cfg80211_ft_event);
13329
13330 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13331 {
13332         struct cfg80211_registered_device *rdev;
13333         struct sk_buff *msg;
13334         void *hdr;
13335         u32 nlportid;
13336
13337         rdev = wiphy_to_rdev(wdev->wiphy);
13338         if (!rdev->crit_proto_nlportid)
13339                 return;
13340
13341         nlportid = rdev->crit_proto_nlportid;
13342         rdev->crit_proto_nlportid = 0;
13343
13344         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13345         if (!msg)
13346                 return;
13347
13348         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13349         if (!hdr)
13350                 goto nla_put_failure;
13351
13352         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13353             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13354                 goto nla_put_failure;
13355
13356         genlmsg_end(msg, hdr);
13357
13358         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13359         return;
13360
13361  nla_put_failure:
13362         if (hdr)
13363                 genlmsg_cancel(msg, hdr);
13364         nlmsg_free(msg);
13365
13366 }
13367 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13368
13369 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13370 {
13371         struct wiphy *wiphy = wdev->wiphy;
13372         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13373         struct sk_buff *msg;
13374         void *hdr;
13375
13376         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13377         if (!msg)
13378                 return;
13379
13380         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13381         if (!hdr)
13382                 goto out;
13383
13384         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13385             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13386             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13387                 goto out;
13388
13389         genlmsg_end(msg, hdr);
13390
13391         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13392                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13393         return;
13394  out:
13395         nlmsg_free(msg);
13396 }
13397
13398 /* initialisation/exit functions */
13399
13400 int nl80211_init(void)
13401 {
13402         int err;
13403
13404         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13405                                                    nl80211_mcgrps);
13406         if (err)
13407                 return err;
13408
13409         err = netlink_register_notifier(&nl80211_netlink_notifier);
13410         if (err)
13411                 goto err_out;
13412
13413         return 0;
13414  err_out:
13415         genl_unregister_family(&nl80211_fam);
13416         return err;
13417 }
13418
13419 void nl80211_exit(void)
13420 {
13421         netlink_unregister_notifier(&nl80211_netlink_notifier);
13422         genl_unregister_family(&nl80211_fam);
13423 }