net/wireless/sme.c

   1 /*
   2  * SME code for cfg80211
   3  * both driver SME event handling and the SME implementation
   4  * (for nl80211's connect() and wext)
   5  *
   6  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   8  */
   9
  10 #include <linux/etherdevice.h>
  11 #include <linux/if_arp.h>
  12 #include <linux/slab.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/wireless.h>
  15 #include <linux/export.h>
  16 #include <net/iw_handler.h>
  17 #include <net/cfg80211.h>
  18 #include <net/rtnetlink.h>
  19 #include "nl80211.h"
  20 #include "reg.h"
  21 #include "rdev-ops.h"
  22
  23 /*
  24  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  25  * driver. This is is for implementing nl80211's connect/disconnect
  26  * and wireless extensions (if configured.)
  27  */
  28
  29 struct cfg80211_conn {
  30         struct cfg80211_connect_params params;
  31         /* these are sub-states of the _CONNECTING sme_state */
  32         enum {
  33                 CFG80211_CONN_SCANNING,
  34                 CFG80211_CONN_SCAN_AGAIN,
  35                 CFG80211_CONN_AUTHENTICATE_NEXT,
  36                 CFG80211_CONN_AUTHENTICATING,
  37                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  38                 CFG80211_CONN_ASSOCIATE_NEXT,
  39                 CFG80211_CONN_ASSOCIATING,
  40                 CFG80211_CONN_ASSOC_FAILED,
  41                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  42                 CFG80211_CONN_DEAUTH,
  43                 CFG80211_CONN_ABANDON,
  44                 CFG80211_CONN_CONNECTED,
  45         } state;
  46         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  47         const u8 *ie;
  48         size_t ie_len;
  49         bool auto_auth, prev_bssid_valid;
  50 };
  51
  52 static void cfg80211_sme_free(struct wireless_dev *wdev)
  53 {
  54         if (!wdev->conn)
  55                 return;
  56
  57         kfree(wdev->conn->ie);
  58         kfree(wdev->conn);
  59         wdev->conn = NULL;
  60 }
  61
  62 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  63 {
  64         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  65         struct cfg80211_scan_request *request;
  66         int n_channels, err;
  67
  68         ASSERT_RTNL();
  69         ASSERT_WDEV_LOCK(wdev);
  70
  71         if (rdev->scan_req || rdev->scan_msg)
  72                 return -EBUSY;
  73
  74         if (wdev->conn->params.channel)
  75                 n_channels = 1;
  76         else
  77                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  78
  79         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  80                           sizeof(request->channels[0]) * n_channels,
  81                           GFP_KERNEL);
  82         if (!request)
  83                 return -ENOMEM;
  84
  85         if (wdev->conn->params.channel) {
  86                 enum nl80211_band band = wdev->conn->params.channel->band;
  87                 struct ieee80211_supported_band *sband =
  88                         wdev->wiphy->bands[band];
  89
  90                 if (!sband) {
  91                         kfree(request);
  92                         return -EINVAL;
  93                 }
  94                 request->channels[0] = wdev->conn->params.channel;
  95                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  96         } else {
  97                 int i = 0, j;
  98                 enum nl80211_band band;
  99                 struct ieee80211_supported_band *bands;
 100                 struct ieee80211_channel *channel;
 101
 102                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 103                         bands = wdev->wiphy->bands[band];
 104                         if (!bands)
 105                                 continue;
 106                         for (j = 0; j < bands->n_channels; j++) {
 107                                 channel = &bands->channels[j];
 108                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 109                                         continue;
 110                                 request->channels[i++] = channel;
 111                         }
 112                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 113                 }
 114                 n_channels = i;
 115         }
 116         request->n_channels = n_channels;
 117         request->ssids = (void *)&request->channels[n_channels];
 118         request->n_ssids = 1;
 119
 120         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 121                 wdev->conn->params.ssid_len);
 122         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 123
 124         eth_broadcast_addr(request->bssid);
 125
 126         request->wdev = wdev;
 127         request->wiphy = &rdev->wiphy;
 128         request->scan_start = jiffies;
 129
 130         rdev->scan_req = request;
 131
 132         err = rdev_scan(rdev, request);
 133         if (!err) {
 134                 wdev->conn->state = CFG80211_CONN_SCANNING;
 135                 nl80211_send_scan_start(rdev, wdev);
 136                 dev_hold(wdev->netdev);
 137         } else {
 138                 rdev->scan_req = NULL;
 139                 kfree(request);
 140         }
 141         return err;
 142 }
 143
 144 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 145                                  enum nl80211_timeout_reason *treason)
 146 {
 147         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 148         struct cfg80211_connect_params *params;
 149         struct cfg80211_assoc_request req = {};
 150         int err;
 151
 152         ASSERT_WDEV_LOCK(wdev);
 153
 154         if (!wdev->conn)
 155                 return 0;
 156
 157         params = &wdev->conn->params;
 158
 159         switch (wdev->conn->state) {
 160         case CFG80211_CONN_SCANNING:
 161                 /* didn't find it during scan ... */
 162                 return -ENOENT;
 163         case CFG80211_CONN_SCAN_AGAIN:
 164                 return cfg80211_conn_scan(wdev);
 165         case CFG80211_CONN_AUTHENTICATE_NEXT:
 166                 if (WARN_ON(!rdev->ops->auth))
 167                         return -EOPNOTSUPP;
 168                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 169                 return cfg80211_mlme_auth(rdev, wdev->netdev,
 170                                           params->channel, params->auth_type,
 171                                           params->bssid,
 172                                           params->ssid, params->ssid_len,
 173                                           NULL, 0,
 174                                           params->key, params->key_len,
 175                                           params->key_idx, NULL, 0);
 176         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 177                 *treason = NL80211_TIMEOUT_AUTH;
 178                 return -ENOTCONN;
 179         case CFG80211_CONN_ASSOCIATE_NEXT:
 180                 if (WARN_ON(!rdev->ops->assoc))
 181                         return -EOPNOTSUPP;
 182                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 183                 if (wdev->conn->prev_bssid_valid)
 184                         req.prev_bssid = wdev->conn->prev_bssid;
 185                 req.ie = params->ie;
 186                 req.ie_len = params->ie_len;
 187                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 188                 req.crypto = params->crypto;
 189                 req.flags = params->flags;
 190                 req.ht_capa = params->ht_capa;
 191                 req.ht_capa_mask = params->ht_capa_mask;
 192                 req.vht_capa = params->vht_capa;
 193                 req.vht_capa_mask = params->vht_capa_mask;
 194
 195                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
 196                                           params->bssid, params->ssid,
 197                                           params->ssid_len, &req);
 198                 if (err)
 199                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 200                                              NULL, 0,
 201                                              WLAN_REASON_DEAUTH_LEAVING,
 202                                              false);
 203                 return err;
 204         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 205                 *treason = NL80211_TIMEOUT_ASSOC;
 206                 /* fall through */
 207         case CFG80211_CONN_ASSOC_FAILED:
 208                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 209                                      NULL, 0,
 210                                      WLAN_REASON_DEAUTH_LEAVING, false);
 211                 return -ENOTCONN;
 212         case CFG80211_CONN_DEAUTH:
 213                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 214                                      NULL, 0,
 215                                      WLAN_REASON_DEAUTH_LEAVING, false);
 216                 /* fall through */
 217         case CFG80211_CONN_ABANDON:
 218                 /* free directly, disconnected event already sent */
 219                 cfg80211_sme_free(wdev);
 220                 return 0;
 221         default:
 222                 return 0;
 223         }
 224 }
 225
 226 void cfg80211_conn_work(struct work_struct *work)
 227 {
 228         struct cfg80211_registered_device *rdev =
 229                 container_of(work, struct cfg80211_registered_device, conn_work);
 230         struct wireless_dev *wdev;
 231         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 232         enum nl80211_timeout_reason treason;
 233
 234         rtnl_lock();
 235
 236         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 237                 if (!wdev->netdev)
 238                         continue;
 239
 240                 wdev_lock(wdev);
 241                 if (!netif_running(wdev->netdev)) {
 242                         wdev_unlock(wdev);
 243                         continue;
 244                 }
 245                 if (!wdev->conn ||
 246                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 247                         wdev_unlock(wdev);
 248                         continue;
 249                 }
 250                 if (wdev->conn->params.bssid) {
 251                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 252                         bssid = bssid_buf;
 253                 }
 254                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 255                 if (cfg80211_conn_do_work(wdev, &treason)) {
 256                         struct cfg80211_connect_resp_params cr;
 257
 258                         memset(&cr, 0, sizeof(cr));
 259                         cr.status = -1;
 260                         cr.bssid = bssid;
 261                         cr.timeout_reason = treason;
 262                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 263                 }
 264                 wdev_unlock(wdev);
 265         }
 266
 267         rtnl_unlock();
 268 }
 269
 270 /* Returned bss is reference counted and must be cleaned up appropriately. */
 271 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 272 {
 273         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 274         struct cfg80211_bss *bss;
 275
 276         ASSERT_WDEV_LOCK(wdev);
 277
 278         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 279                                wdev->conn->params.bssid,
 280                                wdev->conn->params.ssid,
 281                                wdev->conn->params.ssid_len,
 282                                wdev->conn_bss_type,
 283                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 284         if (!bss)
 285                 return NULL;
 286
 287         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 288         wdev->conn->params.bssid = wdev->conn->bssid;
 289         wdev->conn->params.channel = bss->channel;
 290         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 291         schedule_work(&rdev->conn_work);
 292
 293         return bss;
 294 }
 295
 296 static void __cfg80211_sme_scan_done(struct net_device *dev)
 297 {
 298         struct wireless_dev *wdev = dev->ieee80211_ptr;
 299         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 300         struct cfg80211_bss *bss;
 301
 302         ASSERT_WDEV_LOCK(wdev);
 303
 304         if (!wdev->conn)
 305                 return;
 306
 307         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 308             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 309                 return;
 310
 311         bss = cfg80211_get_conn_bss(wdev);
 312         if (bss)
 313                 cfg80211_put_bss(&rdev->wiphy, bss);
 314         else
 315                 schedule_work(&rdev->conn_work);
 316 }
 317
 318 void cfg80211_sme_scan_done(struct net_device *dev)
 319 {
 320         struct wireless_dev *wdev = dev->ieee80211_ptr;
 321
 322         wdev_lock(wdev);
 323         __cfg80211_sme_scan_done(dev);
 324         wdev_unlock(wdev);
 325 }
 326
 327 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 328 {
 329         struct wiphy *wiphy = wdev->wiphy;
 330         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 331         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 332         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 333
 334         ASSERT_WDEV_LOCK(wdev);
 335
 336         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 337                 return;
 338
 339         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 340             wdev->conn->auto_auth &&
 341             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 342                 /* select automatically between only open, shared, leap */
 343                 switch (wdev->conn->params.auth_type) {
 344                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 345                         if (wdev->connect_keys)
 346                                 wdev->conn->params.auth_type =
 347                                         NL80211_AUTHTYPE_SHARED_KEY;
 348                         else
 349                                 wdev->conn->params.auth_type =
 350                                         NL80211_AUTHTYPE_NETWORK_EAP;
 351                         break;
 352                 case NL80211_AUTHTYPE_SHARED_KEY:
 353                         wdev->conn->params.auth_type =
 354                                 NL80211_AUTHTYPE_NETWORK_EAP;
 355                         break;
 356                 default:
 357                         /* huh? */
 358                         wdev->conn->params.auth_type =
 359                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 360                         break;
 361                 }
 362                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 363                 schedule_work(&rdev->conn_work);
 364         } else if (status_code != WLAN_STATUS_SUCCESS) {
 365                 struct cfg80211_connect_resp_params cr;
 366
 367                 memset(&cr, 0, sizeof(cr));
 368                 cr.status = status_code;
 369                 cr.bssid = mgmt->bssid;
 370                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 371                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 372         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 373                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 374                 schedule_work(&rdev->conn_work);
 375         }
 376 }
 377
 378 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 379 {
 380         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 381
 382         if (!wdev->conn)
 383                 return false;
 384
 385         if (status == WLAN_STATUS_SUCCESS) {
 386                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 387                 return false;
 388         }
 389
 390         if (wdev->conn->prev_bssid_valid) {
 391                 /*
 392                  * Some stupid APs don't accept reassoc, so we
 393                  * need to fall back to trying regular assoc;
 394                  * return true so no event is sent to userspace.
 395                  */
 396                 wdev->conn->prev_bssid_valid = false;
 397                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 398                 schedule_work(&rdev->conn_work);
 399                 return true;
 400         }
 401
 402         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 403         schedule_work(&rdev->conn_work);
 404         return false;
 405 }
 406
 407 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 408 {
 409         cfg80211_sme_free(wdev);
 410 }
 411
 412 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 413 {
 414         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 415
 416         if (!wdev->conn)
 417                 return;
 418
 419         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 420         schedule_work(&rdev->conn_work);
 421 }
 422
 423 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 424 {
 425         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 426
 427         if (!wdev->conn)
 428                 return;
 429
 430         wdev->conn->state = CFG80211_CONN_DEAUTH;
 431         schedule_work(&rdev->conn_work);
 432 }
 433
 434 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 435 {
 436         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 437
 438         if (!wdev->conn)
 439                 return;
 440
 441         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 442         schedule_work(&rdev->conn_work);
 443 }
 444
 445 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 446 {
 447         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 448
 449         if (!wdev->conn)
 450                 return;
 451
 452         wdev->conn->state = CFG80211_CONN_ABANDON;
 453         schedule_work(&rdev->conn_work);
 454 }
 455
 456 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 457                                      const u8 *ies, size_t ies_len,
 458                                      const u8 **out_ies, size_t *out_ies_len)
 459 {
 460         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 461         u8 *buf;
 462         size_t offs;
 463
 464         if (!rdev->wiphy.extended_capabilities_len ||
 465             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 466                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 467                 if (!*out_ies)
 468                         return -ENOMEM;
 469                 *out_ies_len = ies_len;
 470                 return 0;
 471         }
 472
 473         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 474                       GFP_KERNEL);
 475         if (!buf)
 476                 return -ENOMEM;
 477
 478         if (ies_len) {
 479                 static const u8 before_extcapa[] = {
 480                         /* not listing IEs expected to be created by driver */
 481                         WLAN_EID_RSN,
 482                         WLAN_EID_QOS_CAPA,
 483                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 484                         WLAN_EID_MOBILITY_DOMAIN,
 485                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 486                         WLAN_EID_BSS_COEX_2040,
 487                 };
 488
 489                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 490                                           ARRAY_SIZE(before_extcapa), 0);
 491                 memcpy(buf, ies, offs);
 492                 /* leave a whole for extended capabilities IE */
 493                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 494                        ies + offs, ies_len - offs);
 495         } else {
 496                 offs = 0;
 497         }
 498
 499         /* place extended capabilities IE (with only driver capabilities) */
 500         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 501         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 502         memcpy(buf + offs + 2,
 503                rdev->wiphy.extended_capabilities,
 504                rdev->wiphy.extended_capabilities_len);
 505
 506         *out_ies = buf;
 507         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 508
 509         return 0;
 510 }
 511
 512 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 513                                 struct cfg80211_connect_params *connect,
 514                                 const u8 *prev_bssid)
 515 {
 516         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 517         struct cfg80211_bss *bss;
 518         int err;
 519
 520         if (!rdev->ops->auth || !rdev->ops->assoc)
 521                 return -EOPNOTSUPP;
 522
 523         if (wdev->current_bss) {
 524                 if (!prev_bssid)
 525                         return -EALREADY;
 526                 if (prev_bssid &&
 527                     !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
 528                         return -ENOTCONN;
 529                 cfg80211_unhold_bss(wdev->current_bss);
 530                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 531                 wdev->current_bss = NULL;
 532
 533                 cfg80211_sme_free(wdev);
 534         }
 535
 536         if (WARN_ON(wdev->conn))
 537                 return -EINPROGRESS;
 538
 539         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 540         if (!wdev->conn)
 541                 return -ENOMEM;
 542
 543         /*
 544          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 545          */
 546         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 547         if (connect->bssid) {
 548                 wdev->conn->params.bssid = wdev->conn->bssid;
 549                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 550         }
 551
 552         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 553                                       &wdev->conn->ie,
 554                                       &wdev->conn->params.ie_len)) {
 555                 kfree(wdev->conn);
 556                 wdev->conn = NULL;
 557                 return -ENOMEM;
 558         }
 559         wdev->conn->params.ie = wdev->conn->ie;
 560
 561         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 562                 wdev->conn->auto_auth = true;
 563                 /* start with open system ... should mostly work */
 564                 wdev->conn->params.auth_type =
 565                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 566         } else {
 567                 wdev->conn->auto_auth = false;
 568         }
 569
 570         wdev->conn->params.ssid = wdev->ssid;
 571         wdev->conn->params.ssid_len = wdev->ssid_len;
 572
 573         /* see if we have the bss already */
 574         bss = cfg80211_get_conn_bss(wdev);
 575
 576         if (prev_bssid) {
 577                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 578                 wdev->conn->prev_bssid_valid = true;
 579         }
 580
 581         /* we're good if we have a matching bss struct */
 582         if (bss) {
 583                 enum nl80211_timeout_reason treason;
 584
 585                 err = cfg80211_conn_do_work(wdev, &treason);
 586                 cfg80211_put_bss(wdev->wiphy, bss);
 587         } else {
 588                 /* otherwise we'll need to scan for the AP first */
 589                 err = cfg80211_conn_scan(wdev);
 590
 591                 /*
 592                  * If we can't scan right now, then we need to scan again
 593                  * after the current scan finished, since the parameters
 594                  * changed (unless we find a good AP anyway).
 595                  */
 596                 if (err == -EBUSY) {
 597                         err = 0;
 598                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 599                 }
 600         }
 601
 602         if (err)
 603                 cfg80211_sme_free(wdev);
 604
 605         return err;
 606 }
 607
 608 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 609 {
 610         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 611         int err;
 612
 613         if (!wdev->conn)
 614                 return 0;
 615
 616         if (!rdev->ops->deauth)
 617                 return -EOPNOTSUPP;
 618
 619         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 620             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 621                 err = 0;
 622                 goto out;
 623         }
 624
 625         /* wdev->conn->params.bssid must be set if > SCANNING */
 626         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 627                                    wdev->conn->params.bssid,
 628                                    NULL, 0, reason, false);
 629  out:
 630         cfg80211_sme_free(wdev);
 631         return err;
 632 }
 633
 634 /*
 635  * code shared for in-device and software SME
 636  */
 637
 638 static bool cfg80211_is_all_idle(void)
 639 {
 640         struct cfg80211_registered_device *rdev;
 641         struct wireless_dev *wdev;
 642         bool is_all_idle = true;
 643
 644         /*
 645          * All devices must be idle as otherwise if you are actively
 646          * scanning some new beacon hints could be learned and would
 647          * count as new regulatory hints.
 648          */
 649         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 650                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 651                         wdev_lock(wdev);
 652                         if (wdev->conn || wdev->current_bss)
 653                                 is_all_idle = false;
 654                         wdev_unlock(wdev);
 655                 }
 656         }
 657
 658         return is_all_idle;
 659 }
 660
 661 static void disconnect_work(struct work_struct *work)
 662 {
 663         rtnl_lock();
 664         if (cfg80211_is_all_idle())
 665                 regulatory_hint_disconnect();
 666         rtnl_unlock();
 667 }
 668
 669 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 670
 671
 672 /*
 673  * API calls for drivers implementing connect/disconnect and
 674  * SME event handling
 675  */
 676
 677 /* This method must consume bss one way or another */
 678 void __cfg80211_connect_result(struct net_device *dev,
 679                                struct cfg80211_connect_resp_params *cr,
 680                                bool wextev)
 681 {
 682         struct wireless_dev *wdev = dev->ieee80211_ptr;
 683         const u8 *country_ie;
 684 #ifdef CONFIG_CFG80211_WEXT
 685         union iwreq_data wrqu;
 686 #endif
 687
 688         ASSERT_WDEV_LOCK(wdev);
 689
 690         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 691                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 692                 cfg80211_put_bss(wdev->wiphy, cr->bss);
 693                 return;
 694         }
 695
 696         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 697                                     GFP_KERNEL);
 698
 699 #ifdef CONFIG_CFG80211_WEXT
 700         if (wextev) {
 701                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 702                         memset(&wrqu, 0, sizeof(wrqu));
 703                         wrqu.data.length = cr->req_ie_len;
 704                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 705                                             cr->req_ie);
 706                 }
 707
 708                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 709                         memset(&wrqu, 0, sizeof(wrqu));
 710                         wrqu.data.length = cr->resp_ie_len;
 711                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 712                                             cr->resp_ie);
 713                 }
 714
 715                 memset(&wrqu, 0, sizeof(wrqu));
 716                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 717                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
 718                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
 719                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
 720                         wdev->wext.prev_bssid_valid = true;
 721                 }
 722                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 723         }
 724 #endif
 725
 726         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
 727                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 728                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
 729                                            wdev->ssid, wdev->ssid_len,
 730                                            wdev->conn_bss_type,
 731                                            IEEE80211_PRIVACY_ANY);
 732                 if (cr->bss)
 733                         cfg80211_hold_bss(bss_from_pub(cr->bss));
 734         }
 735
 736         if (wdev->current_bss) {
 737                 cfg80211_unhold_bss(wdev->current_bss);
 738                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 739                 wdev->current_bss = NULL;
 740         }
 741
 742         if (cr->status != WLAN_STATUS_SUCCESS) {
 743                 kzfree(wdev->connect_keys);
 744                 wdev->connect_keys = NULL;
 745                 wdev->ssid_len = 0;
 746                 wdev->conn_owner_nlportid = 0;
 747                 if (cr->bss) {
 748                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
 749                         cfg80211_put_bss(wdev->wiphy, cr->bss);
 750                 }
 751                 cfg80211_sme_free(wdev);
 752                 return;
 753         }
 754
 755         if (WARN_ON(!cr->bss))
 756                 return;
 757
 758         wdev->current_bss = bss_from_pub(cr->bss);
 759
 760         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 761                 cfg80211_upload_connect_keys(wdev);
 762
 763         rcu_read_lock();
 764         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
 765         if (!country_ie) {
 766                 rcu_read_unlock();
 767                 return;
 768         }
 769
 770         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 771         rcu_read_unlock();
 772
 773         if (!country_ie)
 774                 return;
 775
 776         /*
 777          * ieee80211_bss_get_ie() ensures we can access:
 778          * - country_ie + 2, the start of the country ie data, and
 779          * - and country_ie[1] which is the IE length
 780          */
 781         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
 782                                    country_ie + 2, country_ie[1]);
 783         kfree(country_ie);
 784 }
 785
 786 /* Consumes bss object one way or another */
 787 void cfg80211_connect_done(struct net_device *dev,
 788                            struct cfg80211_connect_resp_params *params,
 789                            gfp_t gfp)
 790 {
 791         struct wireless_dev *wdev = dev->ieee80211_ptr;
 792         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 793         struct cfg80211_event *ev;
 794         unsigned long flags;
 795         u8 *next;
 796
 797         if (params->bss) {
 798                 /* Make sure the bss entry provided by the driver is valid. */
 799                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
 800
 801                 if (WARN_ON(list_empty(&ibss->list))) {
 802                         cfg80211_put_bss(wdev->wiphy, params->bss);
 803                         return;
 804                 }
 805         }
 806
 807         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
 808                      params->req_ie_len + params->resp_ie_len +
 809                      params->fils_kek_len + params->pmk_len +
 810                      (params->pmkid ? WLAN_PMKID_LEN : 0), gfp);
 811         if (!ev) {
 812                 cfg80211_put_bss(wdev->wiphy, params->bss);
 813                 return;
 814         }
 815
 816         ev->type = EVENT_CONNECT_RESULT;
 817         next = ((u8 *)ev) + sizeof(*ev);
 818         if (params->bssid) {
 819                 ev->cr.bssid = next;
 820                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
 821                 next += ETH_ALEN;
 822         }
 823         if (params->req_ie_len) {
 824                 ev->cr.req_ie = next;
 825                 ev->cr.req_ie_len = params->req_ie_len;
 826                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 827                        params->req_ie_len);
 828                 next += params->req_ie_len;
 829         }
 830         if (params->resp_ie_len) {
 831                 ev->cr.resp_ie = next;
 832                 ev->cr.resp_ie_len = params->resp_ie_len;
 833                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 834                        params->resp_ie_len);
 835                 next += params->resp_ie_len;
 836         }
 837         if (params->fils_kek_len) {
 838                 ev->cr.fils_kek = next;
 839                 ev->cr.fils_kek_len = params->fils_kek_len;
 840                 memcpy((void *)ev->cr.fils_kek, params->fils_kek,
 841                        params->fils_kek_len);
 842                 next += params->fils_kek_len;
 843         }
 844         if (params->pmk_len) {
 845                 ev->cr.pmk = next;
 846                 ev->cr.pmk_len = params->pmk_len;
 847                 memcpy((void *)ev->cr.pmk, params->pmk, params->pmk_len);
 848                 next += params->pmk_len;
 849         }
 850         if (params->pmkid) {
 851                 ev->cr.pmkid = next;
 852                 memcpy((void *)ev->cr.pmkid, params->pmkid, WLAN_PMKID_LEN);
 853                 next += WLAN_PMKID_LEN;
 854         }
 855         ev->cr.update_erp_next_seq_num = params->update_erp_next_seq_num;
 856         if (params->update_erp_next_seq_num)
 857                 ev->cr.fils_erp_next_seq_num = params->fils_erp_next_seq_num;
 858         if (params->bss)
 859                 cfg80211_hold_bss(bss_from_pub(params->bss));
 860         ev->cr.bss = params->bss;
 861         ev->cr.status = params->status;
 862         ev->cr.timeout_reason = params->timeout_reason;
 863
 864         spin_lock_irqsave(&wdev->event_lock, flags);
 865         list_add_tail(&ev->list, &wdev->event_list);
 866         spin_unlock_irqrestore(&wdev->event_lock, flags);
 867         queue_work(cfg80211_wq, &rdev->event_work);
 868 }
 869 EXPORT_SYMBOL(cfg80211_connect_done);
 870
 871 /* Consumes bss object one way or another */
 872 void __cfg80211_roamed(struct wireless_dev *wdev,
 873                        struct cfg80211_bss *bss,
 874                        const u8 *req_ie, size_t req_ie_len,
 875                        const u8 *resp_ie, size_t resp_ie_len)
 876 {
 877 #ifdef CONFIG_CFG80211_WEXT
 878         union iwreq_data wrqu;
 879 #endif
 880         ASSERT_WDEV_LOCK(wdev);
 881
 882         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 883                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 884                 goto out;
 885
 886         if (WARN_ON(!wdev->current_bss))
 887                 goto out;
 888
 889         cfg80211_unhold_bss(wdev->current_bss);
 890         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 891         wdev->current_bss = NULL;
 892
 893         cfg80211_hold_bss(bss_from_pub(bss));
 894         wdev->current_bss = bss_from_pub(bss);
 895
 896         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 897                             wdev->netdev, bss->bssid,
 898                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 899                             GFP_KERNEL);
 900
 901 #ifdef CONFIG_CFG80211_WEXT
 902         if (req_ie) {
 903                 memset(&wrqu, 0, sizeof(wrqu));
 904                 wrqu.data.length = req_ie_len;
 905                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 906                                     &wrqu, req_ie);
 907         }
 908
 909         if (resp_ie) {
 910                 memset(&wrqu, 0, sizeof(wrqu));
 911                 wrqu.data.length = resp_ie_len;
 912                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 913                                     &wrqu, resp_ie);
 914         }
 915
 916         memset(&wrqu, 0, sizeof(wrqu));
 917         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 918         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
 919         memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
 920         wdev->wext.prev_bssid_valid = true;
 921         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 922 #endif
 923
 924         return;
 925 out:
 926         cfg80211_put_bss(wdev->wiphy, bss);
 927 }
 928
 929 void cfg80211_roamed(struct net_device *dev,
 930                      struct ieee80211_channel *channel,
 931                      const u8 *bssid,
 932                      const u8 *req_ie, size_t req_ie_len,
 933                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 934 {
 935         struct wireless_dev *wdev = dev->ieee80211_ptr;
 936         struct cfg80211_bss *bss;
 937
 938         bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
 939                                wdev->ssid_len,
 940                                wdev->conn_bss_type, IEEE80211_PRIVACY_ANY);
 941         if (WARN_ON(!bss))
 942                 return;
 943
 944         cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
 945                             resp_ie_len, gfp);
 946 }
 947 EXPORT_SYMBOL(cfg80211_roamed);
 948
 949 /* Consumes bss object one way or another */
 950 void cfg80211_roamed_bss(struct net_device *dev,
 951                          struct cfg80211_bss *bss, const u8 *req_ie,
 952                          size_t req_ie_len, const u8 *resp_ie,
 953                          size_t resp_ie_len, gfp_t gfp)
 954 {
 955         struct wireless_dev *wdev = dev->ieee80211_ptr;
 956         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 957         struct cfg80211_event *ev;
 958         unsigned long flags;
 959
 960         if (WARN_ON(!bss))
 961                 return;
 962
 963         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 964         if (!ev) {
 965                 cfg80211_put_bss(wdev->wiphy, bss);
 966                 return;
 967         }
 968
 969         ev->type = EVENT_ROAMED;
 970         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 971         ev->rm.req_ie_len = req_ie_len;
 972         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 973         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 974         ev->rm.resp_ie_len = resp_ie_len;
 975         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 976         ev->rm.bss = bss;
 977
 978         spin_lock_irqsave(&wdev->event_lock, flags);
 979         list_add_tail(&ev->list, &wdev->event_list);
 980         spin_unlock_irqrestore(&wdev->event_lock, flags);
 981         queue_work(cfg80211_wq, &rdev->event_work);
 982 }
 983 EXPORT_SYMBOL(cfg80211_roamed_bss);
 984
 985 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 986                              size_t ie_len, u16 reason, bool from_ap)
 987 {
 988         struct wireless_dev *wdev = dev->ieee80211_ptr;
 989         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 990         int i;
 991 #ifdef CONFIG_CFG80211_WEXT
 992         union iwreq_data wrqu;
 993 #endif
 994
 995         ASSERT_WDEV_LOCK(wdev);
 996
 997         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 998                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 999                 return;
1000
1001         if (wdev->current_bss) {
1002                 cfg80211_unhold_bss(wdev->current_bss);
1003                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1004         }
1005
1006         wdev->current_bss = NULL;
1007         wdev->ssid_len = 0;
1008         wdev->conn_owner_nlportid = 0;
1009
1010         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1011
1012         /* stop critical protocol if supported */
1013         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1014                 rdev->crit_proto_nlportid = 0;
1015                 rdev_crit_proto_stop(rdev, wdev);
1016         }
1017
1018         /*
1019          * Delete all the keys ... pairwise keys can't really
1020          * exist any more anyway, but default keys might.
1021          */
1022         if (rdev->ops->del_key)
1023                 for (i = 0; i < 6; i++)
1024                         rdev_del_key(rdev, dev, i, false, NULL);
1025
1026         rdev_set_qos_map(rdev, dev, NULL);
1027
1028 #ifdef CONFIG_CFG80211_WEXT
1029         memset(&wrqu, 0, sizeof(wrqu));
1030         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1031         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1032         wdev->wext.connect.ssid_len = 0;
1033 #endif
1034
1035         schedule_work(&cfg80211_disconnect_work);
1036 }
1037
1038 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1039                            const u8 *ie, size_t ie_len,
1040                            bool locally_generated, gfp_t gfp)
1041 {
1042         struct wireless_dev *wdev = dev->ieee80211_ptr;
1043         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1044         struct cfg80211_event *ev;
1045         unsigned long flags;
1046
1047         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1048         if (!ev)
1049                 return;
1050
1051         ev->type = EVENT_DISCONNECTED;
1052         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1053         ev->dc.ie_len = ie_len;
1054         memcpy((void *)ev->dc.ie, ie, ie_len);
1055         ev->dc.reason = reason;
1056         ev->dc.locally_generated = locally_generated;
1057
1058         spin_lock_irqsave(&wdev->event_lock, flags);
1059         list_add_tail(&ev->list, &wdev->event_list);
1060         spin_unlock_irqrestore(&wdev->event_lock, flags);
1061         queue_work(cfg80211_wq, &rdev->event_work);
1062 }
1063 EXPORT_SYMBOL(cfg80211_disconnected);
1064
1065 /*
1066  * API calls for nl80211/wext compatibility code
1067  */
1068 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1069                      struct net_device *dev,
1070                      struct cfg80211_connect_params *connect,
1071                      struct cfg80211_cached_keys *connkeys,
1072                      const u8 *prev_bssid)
1073 {
1074         struct wireless_dev *wdev = dev->ieee80211_ptr;
1075         int err;
1076
1077         ASSERT_WDEV_LOCK(wdev);
1078
1079         if (WARN_ON(wdev->connect_keys)) {
1080                 kzfree(wdev->connect_keys);
1081                 wdev->connect_keys = NULL;
1082         }
1083
1084         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1085                                   rdev->wiphy.ht_capa_mod_mask);
1086
1087         if (connkeys && connkeys->def >= 0) {
1088                 int idx;
1089                 u32 cipher;
1090
1091                 idx = connkeys->def;
1092                 cipher = connkeys->params[idx].cipher;
1093                 /* If given a WEP key we may need it for shared key auth */
1094                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1095                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1096                         connect->key_idx = idx;
1097                         connect->key = connkeys->params[idx].key;
1098                         connect->key_len = connkeys->params[idx].key_len;
1099
1100                         /*
1101                          * If ciphers are not set (e.g. when going through
1102                          * iwconfig), we have to set them appropriately here.
1103                          */
1104                         if (connect->crypto.cipher_group == 0)
1105                                 connect->crypto.cipher_group = cipher;
1106
1107                         if (connect->crypto.n_ciphers_pairwise == 0) {
1108                                 connect->crypto.n_ciphers_pairwise = 1;
1109                                 connect->crypto.ciphers_pairwise[0] = cipher;
1110                         }
1111                 }
1112
1113                 connect->crypto.wep_keys = connkeys->params;
1114                 connect->crypto.wep_tx_key = connkeys->def;
1115         } else {
1116                 if (WARN_ON(connkeys))
1117                         return -EINVAL;
1118         }
1119
1120         wdev->connect_keys = connkeys;
1121         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1122         wdev->ssid_len = connect->ssid_len;
1123
1124         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1125                                               IEEE80211_BSS_TYPE_ESS;
1126
1127         if (!rdev->ops->connect)
1128                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1129         else
1130                 err = rdev_connect(rdev, dev, connect);
1131
1132         if (err) {
1133                 wdev->connect_keys = NULL;
1134                 wdev->ssid_len = 0;
1135                 return err;
1136         }
1137
1138         return 0;
1139 }
1140
1141 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1142                         struct net_device *dev, u16 reason, bool wextev)
1143 {
1144         struct wireless_dev *wdev = dev->ieee80211_ptr;
1145         int err = 0;
1146
1147         ASSERT_WDEV_LOCK(wdev);
1148
1149         kzfree(wdev->connect_keys);
1150         wdev->connect_keys = NULL;
1151
1152         wdev->conn_owner_nlportid = 0;
1153
1154         if (wdev->conn)
1155                 err = cfg80211_sme_disconnect(wdev, reason);
1156         else if (!rdev->ops->disconnect)
1157                 cfg80211_mlme_down(rdev, dev);
1158         else if (wdev->ssid_len)
1159                 err = rdev_disconnect(rdev, dev, reason);
1160
1161         return err;
1162 }
1163
1164 /*
1165  * Used to clean up after the connection / connection attempt owner socket
1166  * disconnects
1167  */
1168 void cfg80211_autodisconnect_wk(struct work_struct *work)
1169 {
1170         struct wireless_dev *wdev =
1171                 container_of(work, struct wireless_dev, disconnect_wk);
1172         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1173
1174         wdev_lock(wdev);
1175
1176         if (wdev->conn_owner_nlportid) {
1177                 /*
1178                  * Use disconnect_bssid if still connecting and ops->disconnect
1179                  * not implemented.  Otherwise we can use cfg80211_disconnect.
1180                  */
1181                 if (rdev->ops->disconnect || wdev->current_bss)
1182                         cfg80211_disconnect(rdev, wdev->netdev,
1183                                             WLAN_REASON_DEAUTH_LEAVING, true);
1184                 else
1185                         cfg80211_mlme_deauth(rdev, wdev->netdev,
1186                                              wdev->disconnect_bssid, NULL, 0,
1187                                              WLAN_REASON_DEAUTH_LEAVING, false);
1188         }
1189
1190         wdev_unlock(wdev);
1191 }