net/wireless/sme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SME code for cfg80211
   4  * both driver SME event handling and the SME implementation
   5  * (for nl80211's connect() and wext)
   6  *
   7  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   8  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   9  * Copyright 2017       Intel Deutschland GmbH
  10  */
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/wireless.h>
  17 #include <linux/export.h>
  18 #include <net/iw_handler.h>
  19 #include <net/cfg80211.h>
  20 #include <net/rtnetlink.h>
  21 #include "nl80211.h"
  22 #include "reg.h"
  23 #include "rdev-ops.h"
  24
  25 /*
  26  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  27  * driver. This is is for implementing nl80211's connect/disconnect
  28  * and wireless extensions (if configured.)
  29  */
  30
  31 struct cfg80211_conn {
  32         struct cfg80211_connect_params params;
  33         /* these are sub-states of the _CONNECTING sme_state */
  34         enum {
  35                 CFG80211_CONN_SCANNING,
  36                 CFG80211_CONN_SCAN_AGAIN,
  37                 CFG80211_CONN_AUTHENTICATE_NEXT,
  38                 CFG80211_CONN_AUTHENTICATING,
  39                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  40                 CFG80211_CONN_ASSOCIATE_NEXT,
  41                 CFG80211_CONN_ASSOCIATING,
  42                 CFG80211_CONN_ASSOC_FAILED,
  43                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  44                 CFG80211_CONN_DEAUTH,
  45                 CFG80211_CONN_ABANDON,
  46                 CFG80211_CONN_CONNECTED,
  47         } state;
  48         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  49         const u8 *ie;
  50         size_t ie_len;
  51         bool auto_auth, prev_bssid_valid;
  52 };
  53
  54 static void cfg80211_sme_free(struct wireless_dev *wdev)
  55 {
  56         if (!wdev->conn)
  57                 return;
  58
  59         kfree(wdev->conn->ie);
  60         kfree(wdev->conn);
  61         wdev->conn = NULL;
  62 }
  63
  64 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  65 {
  66         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  67         struct cfg80211_scan_request *request;
  68         int n_channels, err;
  69
  70         ASSERT_RTNL();
  71         ASSERT_WDEV_LOCK(wdev);
  72
  73         if (rdev->scan_req || rdev->scan_msg)
  74                 return -EBUSY;
  75
  76         if (wdev->conn->params.channel)
  77                 n_channels = 1;
  78         else
  79                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  80
  81         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  82                           sizeof(request->channels[0]) * n_channels,
  83                           GFP_KERNEL);
  84         if (!request)
  85                 return -ENOMEM;
  86
  87         if (wdev->conn->params.channel) {
  88                 enum nl80211_band band = wdev->conn->params.channel->band;
  89                 struct ieee80211_supported_band *sband =
  90                         wdev->wiphy->bands[band];
  91
  92                 if (!sband) {
  93                         kfree(request);
  94                         return -EINVAL;
  95                 }
  96                 request->channels[0] = wdev->conn->params.channel;
  97                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  98         } else {
  99                 int i = 0, j;
 100                 enum nl80211_band band;
 101                 struct ieee80211_supported_band *bands;
 102                 struct ieee80211_channel *channel;
 103
 104                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 105                         bands = wdev->wiphy->bands[band];
 106                         if (!bands)
 107                                 continue;
 108                         for (j = 0; j < bands->n_channels; j++) {
 109                                 channel = &bands->channels[j];
 110                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 111                                         continue;
 112                                 request->channels[i++] = channel;
 113                         }
 114                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 115                 }
 116                 n_channels = i;
 117         }
 118         request->n_channels = n_channels;
 119         request->ssids = (void *)&request->channels[n_channels];
 120         request->n_ssids = 1;
 121
 122         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 123                 wdev->conn->params.ssid_len);
 124         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 125
 126         eth_broadcast_addr(request->bssid);
 127
 128         request->wdev = wdev;
 129         request->wiphy = &rdev->wiphy;
 130         request->scan_start = jiffies;
 131
 132         rdev->scan_req = request;
 133
 134         err = rdev_scan(rdev, request);
 135         if (!err) {
 136                 wdev->conn->state = CFG80211_CONN_SCANNING;
 137                 nl80211_send_scan_start(rdev, wdev);
 138                 dev_hold(wdev->netdev);
 139         } else {
 140                 rdev->scan_req = NULL;
 141                 kfree(request);
 142         }
 143         return err;
 144 }
 145
 146 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 147                                  enum nl80211_timeout_reason *treason)
 148 {
 149         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 150         struct cfg80211_connect_params *params;
 151         struct cfg80211_assoc_request req = {};
 152         int err;
 153
 154         ASSERT_WDEV_LOCK(wdev);
 155
 156         if (!wdev->conn)
 157                 return 0;
 158
 159         params = &wdev->conn->params;
 160
 161         switch (wdev->conn->state) {
 162         case CFG80211_CONN_SCANNING:
 163                 /* didn't find it during scan ... */
 164                 return -ENOENT;
 165         case CFG80211_CONN_SCAN_AGAIN:
 166                 return cfg80211_conn_scan(wdev);
 167         case CFG80211_CONN_AUTHENTICATE_NEXT:
 168                 if (WARN_ON(!rdev->ops->auth))
 169                         return -EOPNOTSUPP;
 170                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 171                 return cfg80211_mlme_auth(rdev, wdev->netdev,
 172                                           params->channel, params->auth_type,
 173                                           params->bssid,
 174                                           params->ssid, params->ssid_len,
 175                                           NULL, 0,
 176                                           params->key, params->key_len,
 177                                           params->key_idx, NULL, 0);
 178         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 179                 *treason = NL80211_TIMEOUT_AUTH;
 180                 return -ENOTCONN;
 181         case CFG80211_CONN_ASSOCIATE_NEXT:
 182                 if (WARN_ON(!rdev->ops->assoc))
 183                         return -EOPNOTSUPP;
 184                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 185                 if (wdev->conn->prev_bssid_valid)
 186                         req.prev_bssid = wdev->conn->prev_bssid;
 187                 req.ie = params->ie;
 188                 req.ie_len = params->ie_len;
 189                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 190                 req.crypto = params->crypto;
 191                 req.flags = params->flags;
 192                 req.ht_capa = params->ht_capa;
 193                 req.ht_capa_mask = params->ht_capa_mask;
 194                 req.vht_capa = params->vht_capa;
 195                 req.vht_capa_mask = params->vht_capa_mask;
 196
 197                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
 198                                           params->bssid, params->ssid,
 199                                           params->ssid_len, &req);
 200                 if (err)
 201                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 202                                              NULL, 0,
 203                                              WLAN_REASON_DEAUTH_LEAVING,
 204                                              false);
 205                 return err;
 206         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 207                 *treason = NL80211_TIMEOUT_ASSOC;
 208                 /* fall through */
 209         case CFG80211_CONN_ASSOC_FAILED:
 210                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 211                                      NULL, 0,
 212                                      WLAN_REASON_DEAUTH_LEAVING, false);
 213                 return -ENOTCONN;
 214         case CFG80211_CONN_DEAUTH:
 215                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 216                                      NULL, 0,
 217                                      WLAN_REASON_DEAUTH_LEAVING, false);
 218                 /* fall through */
 219         case CFG80211_CONN_ABANDON:
 220                 /* free directly, disconnected event already sent */
 221                 cfg80211_sme_free(wdev);
 222                 return 0;
 223         default:
 224                 return 0;
 225         }
 226 }
 227
 228 void cfg80211_conn_work(struct work_struct *work)
 229 {
 230         struct cfg80211_registered_device *rdev =
 231                 container_of(work, struct cfg80211_registered_device, conn_work);
 232         struct wireless_dev *wdev;
 233         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 234         enum nl80211_timeout_reason treason;
 235
 236         rtnl_lock();
 237
 238         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 239                 if (!wdev->netdev)
 240                         continue;
 241
 242                 wdev_lock(wdev);
 243                 if (!netif_running(wdev->netdev)) {
 244                         wdev_unlock(wdev);
 245                         continue;
 246                 }
 247                 if (!wdev->conn ||
 248                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 249                         wdev_unlock(wdev);
 250                         continue;
 251                 }
 252                 if (wdev->conn->params.bssid) {
 253                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 254                         bssid = bssid_buf;
 255                 }
 256                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 257                 if (cfg80211_conn_do_work(wdev, &treason)) {
 258                         struct cfg80211_connect_resp_params cr;
 259
 260                         memset(&cr, 0, sizeof(cr));
 261                         cr.status = -1;
 262                         cr.bssid = bssid;
 263                         cr.timeout_reason = treason;
 264                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 265                 }
 266                 wdev_unlock(wdev);
 267         }
 268
 269         rtnl_unlock();
 270 }
 271
 272 /* Returned bss is reference counted and must be cleaned up appropriately. */
 273 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 274 {
 275         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 276         struct cfg80211_bss *bss;
 277
 278         ASSERT_WDEV_LOCK(wdev);
 279
 280         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 281                                wdev->conn->params.bssid,
 282                                wdev->conn->params.ssid,
 283                                wdev->conn->params.ssid_len,
 284                                wdev->conn_bss_type,
 285                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 286         if (!bss)
 287                 return NULL;
 288
 289         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 290         wdev->conn->params.bssid = wdev->conn->bssid;
 291         wdev->conn->params.channel = bss->channel;
 292         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 293         schedule_work(&rdev->conn_work);
 294
 295         return bss;
 296 }
 297
 298 static void __cfg80211_sme_scan_done(struct net_device *dev)
 299 {
 300         struct wireless_dev *wdev = dev->ieee80211_ptr;
 301         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 302         struct cfg80211_bss *bss;
 303
 304         ASSERT_WDEV_LOCK(wdev);
 305
 306         if (!wdev->conn)
 307                 return;
 308
 309         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 310             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 311                 return;
 312
 313         bss = cfg80211_get_conn_bss(wdev);
 314         if (bss)
 315                 cfg80211_put_bss(&rdev->wiphy, bss);
 316         else
 317                 schedule_work(&rdev->conn_work);
 318 }
 319
 320 void cfg80211_sme_scan_done(struct net_device *dev)
 321 {
 322         struct wireless_dev *wdev = dev->ieee80211_ptr;
 323
 324         wdev_lock(wdev);
 325         __cfg80211_sme_scan_done(dev);
 326         wdev_unlock(wdev);
 327 }
 328
 329 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 330 {
 331         struct wiphy *wiphy = wdev->wiphy;
 332         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 333         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 334         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 335
 336         ASSERT_WDEV_LOCK(wdev);
 337
 338         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 339                 return;
 340
 341         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 342             wdev->conn->auto_auth &&
 343             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 344                 /* select automatically between only open, shared, leap */
 345                 switch (wdev->conn->params.auth_type) {
 346                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 347                         if (wdev->connect_keys)
 348                                 wdev->conn->params.auth_type =
 349                                         NL80211_AUTHTYPE_SHARED_KEY;
 350                         else
 351                                 wdev->conn->params.auth_type =
 352                                         NL80211_AUTHTYPE_NETWORK_EAP;
 353                         break;
 354                 case NL80211_AUTHTYPE_SHARED_KEY:
 355                         wdev->conn->params.auth_type =
 356                                 NL80211_AUTHTYPE_NETWORK_EAP;
 357                         break;
 358                 default:
 359                         /* huh? */
 360                         wdev->conn->params.auth_type =
 361                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 362                         break;
 363                 }
 364                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 365                 schedule_work(&rdev->conn_work);
 366         } else if (status_code != WLAN_STATUS_SUCCESS) {
 367                 struct cfg80211_connect_resp_params cr;
 368
 369                 memset(&cr, 0, sizeof(cr));
 370                 cr.status = status_code;
 371                 cr.bssid = mgmt->bssid;
 372                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 373                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 374         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 375                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 376                 schedule_work(&rdev->conn_work);
 377         }
 378 }
 379
 380 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 381 {
 382         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 383
 384         if (!wdev->conn)
 385                 return false;
 386
 387         if (status == WLAN_STATUS_SUCCESS) {
 388                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 389                 return false;
 390         }
 391
 392         if (wdev->conn->prev_bssid_valid) {
 393                 /*
 394                  * Some stupid APs don't accept reassoc, so we
 395                  * need to fall back to trying regular assoc;
 396                  * return true so no event is sent to userspace.
 397                  */
 398                 wdev->conn->prev_bssid_valid = false;
 399                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 400                 schedule_work(&rdev->conn_work);
 401                 return true;
 402         }
 403
 404         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 405         schedule_work(&rdev->conn_work);
 406         return false;
 407 }
 408
 409 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 410 {
 411         cfg80211_sme_free(wdev);
 412 }
 413
 414 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 415 {
 416         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 417
 418         if (!wdev->conn)
 419                 return;
 420
 421         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 422         schedule_work(&rdev->conn_work);
 423 }
 424
 425 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 426 {
 427         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 428
 429         if (!wdev->conn)
 430                 return;
 431
 432         wdev->conn->state = CFG80211_CONN_DEAUTH;
 433         schedule_work(&rdev->conn_work);
 434 }
 435
 436 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 437 {
 438         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 439
 440         if (!wdev->conn)
 441                 return;
 442
 443         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 444         schedule_work(&rdev->conn_work);
 445 }
 446
 447 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 448 {
 449         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 450
 451         if (!wdev->conn)
 452                 return;
 453
 454         wdev->conn->state = CFG80211_CONN_ABANDON;
 455         schedule_work(&rdev->conn_work);
 456 }
 457
 458 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 459                                      const u8 *ies, size_t ies_len,
 460                                      const u8 **out_ies, size_t *out_ies_len)
 461 {
 462         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 463         u8 *buf;
 464         size_t offs;
 465
 466         if (!rdev->wiphy.extended_capabilities_len ||
 467             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 468                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 469                 if (!*out_ies)
 470                         return -ENOMEM;
 471                 *out_ies_len = ies_len;
 472                 return 0;
 473         }
 474
 475         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 476                       GFP_KERNEL);
 477         if (!buf)
 478                 return -ENOMEM;
 479
 480         if (ies_len) {
 481                 static const u8 before_extcapa[] = {
 482                         /* not listing IEs expected to be created by driver */
 483                         WLAN_EID_RSN,
 484                         WLAN_EID_QOS_CAPA,
 485                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 486                         WLAN_EID_MOBILITY_DOMAIN,
 487                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 488                         WLAN_EID_BSS_COEX_2040,
 489                 };
 490
 491                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 492                                           ARRAY_SIZE(before_extcapa), 0);
 493                 memcpy(buf, ies, offs);
 494                 /* leave a whole for extended capabilities IE */
 495                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 496                        ies + offs, ies_len - offs);
 497         } else {
 498                 offs = 0;
 499         }
 500
 501         /* place extended capabilities IE (with only driver capabilities) */
 502         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 503         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 504         memcpy(buf + offs + 2,
 505                rdev->wiphy.extended_capabilities,
 506                rdev->wiphy.extended_capabilities_len);
 507
 508         *out_ies = buf;
 509         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 510
 511         return 0;
 512 }
 513
 514 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 515                                 struct cfg80211_connect_params *connect,
 516                                 const u8 *prev_bssid)
 517 {
 518         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 519         struct cfg80211_bss *bss;
 520         int err;
 521
 522         if (!rdev->ops->auth || !rdev->ops->assoc)
 523                 return -EOPNOTSUPP;
 524
 525         if (wdev->current_bss) {
 526                 cfg80211_unhold_bss(wdev->current_bss);
 527                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 528                 wdev->current_bss = NULL;
 529
 530                 cfg80211_sme_free(wdev);
 531         }
 532
 533         if (WARN_ON(wdev->conn))
 534                 return -EINPROGRESS;
 535
 536         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 537         if (!wdev->conn)
 538                 return -ENOMEM;
 539
 540         /*
 541          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 542          */
 543         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 544         if (connect->bssid) {
 545                 wdev->conn->params.bssid = wdev->conn->bssid;
 546                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 547         }
 548
 549         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 550                                       &wdev->conn->ie,
 551                                       &wdev->conn->params.ie_len)) {
 552                 kfree(wdev->conn);
 553                 wdev->conn = NULL;
 554                 return -ENOMEM;
 555         }
 556         wdev->conn->params.ie = wdev->conn->ie;
 557
 558         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 559                 wdev->conn->auto_auth = true;
 560                 /* start with open system ... should mostly work */
 561                 wdev->conn->params.auth_type =
 562                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 563         } else {
 564                 wdev->conn->auto_auth = false;
 565         }
 566
 567         wdev->conn->params.ssid = wdev->ssid;
 568         wdev->conn->params.ssid_len = wdev->ssid_len;
 569
 570         /* see if we have the bss already */
 571         bss = cfg80211_get_conn_bss(wdev);
 572
 573         if (prev_bssid) {
 574                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 575                 wdev->conn->prev_bssid_valid = true;
 576         }
 577
 578         /* we're good if we have a matching bss struct */
 579         if (bss) {
 580                 enum nl80211_timeout_reason treason;
 581
 582                 err = cfg80211_conn_do_work(wdev, &treason);
 583                 cfg80211_put_bss(wdev->wiphy, bss);
 584         } else {
 585                 /* otherwise we'll need to scan for the AP first */
 586                 err = cfg80211_conn_scan(wdev);
 587
 588                 /*
 589                  * If we can't scan right now, then we need to scan again
 590                  * after the current scan finished, since the parameters
 591                  * changed (unless we find a good AP anyway).
 592                  */
 593                 if (err == -EBUSY) {
 594                         err = 0;
 595                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 596                 }
 597         }
 598
 599         if (err)
 600                 cfg80211_sme_free(wdev);
 601
 602         return err;
 603 }
 604
 605 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 606 {
 607         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 608         int err;
 609
 610         if (!wdev->conn)
 611                 return 0;
 612
 613         if (!rdev->ops->deauth)
 614                 return -EOPNOTSUPP;
 615
 616         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 617             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 618                 err = 0;
 619                 goto out;
 620         }
 621
 622         /* wdev->conn->params.bssid must be set if > SCANNING */
 623         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 624                                    wdev->conn->params.bssid,
 625                                    NULL, 0, reason, false);
 626  out:
 627         cfg80211_sme_free(wdev);
 628         return err;
 629 }
 630
 631 /*
 632  * code shared for in-device and software SME
 633  */
 634
 635 static bool cfg80211_is_all_idle(void)
 636 {
 637         struct cfg80211_registered_device *rdev;
 638         struct wireless_dev *wdev;
 639         bool is_all_idle = true;
 640
 641         /*
 642          * All devices must be idle as otherwise if you are actively
 643          * scanning some new beacon hints could be learned and would
 644          * count as new regulatory hints.
 645          */
 646         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 647                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 648                         wdev_lock(wdev);
 649                         if (wdev->conn || wdev->current_bss)
 650                                 is_all_idle = false;
 651                         wdev_unlock(wdev);
 652                 }
 653         }
 654
 655         return is_all_idle;
 656 }
 657
 658 static void disconnect_work(struct work_struct *work)
 659 {
 660         rtnl_lock();
 661         if (cfg80211_is_all_idle())
 662                 regulatory_hint_disconnect();
 663         rtnl_unlock();
 664 }
 665
 666 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 667
 668
 669 /*
 670  * API calls for drivers implementing connect/disconnect and
 671  * SME event handling
 672  */
 673
 674 /* This method must consume bss one way or another */
 675 void __cfg80211_connect_result(struct net_device *dev,
 676                                struct cfg80211_connect_resp_params *cr,
 677                                bool wextev)
 678 {
 679         struct wireless_dev *wdev = dev->ieee80211_ptr;
 680         const u8 *country_ie;
 681 #ifdef CONFIG_CFG80211_WEXT
 682         union iwreq_data wrqu;
 683 #endif
 684
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 688                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 689                 cfg80211_put_bss(wdev->wiphy, cr->bss);
 690                 return;
 691         }
 692
 693         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 694                                     GFP_KERNEL);
 695
 696 #ifdef CONFIG_CFG80211_WEXT
 697         if (wextev) {
 698                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 699                         memset(&wrqu, 0, sizeof(wrqu));
 700                         wrqu.data.length = cr->req_ie_len;
 701                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 702                                             cr->req_ie);
 703                 }
 704
 705                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 706                         memset(&wrqu, 0, sizeof(wrqu));
 707                         wrqu.data.length = cr->resp_ie_len;
 708                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 709                                             cr->resp_ie);
 710                 }
 711
 712                 memset(&wrqu, 0, sizeof(wrqu));
 713                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 714                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
 715                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
 716                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
 717                         wdev->wext.prev_bssid_valid = true;
 718                 }
 719                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 720         }
 721 #endif
 722
 723         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
 724                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 725                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
 726                                            wdev->ssid, wdev->ssid_len,
 727                                            wdev->conn_bss_type,
 728                                            IEEE80211_PRIVACY_ANY);
 729                 if (cr->bss)
 730                         cfg80211_hold_bss(bss_from_pub(cr->bss));
 731         }
 732
 733         if (wdev->current_bss) {
 734                 cfg80211_unhold_bss(wdev->current_bss);
 735                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 736                 wdev->current_bss = NULL;
 737         }
 738
 739         if (cr->status != WLAN_STATUS_SUCCESS) {
 740                 kzfree(wdev->connect_keys);
 741                 wdev->connect_keys = NULL;
 742                 wdev->ssid_len = 0;
 743                 wdev->conn_owner_nlportid = 0;
 744                 if (cr->bss) {
 745                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
 746                         cfg80211_put_bss(wdev->wiphy, cr->bss);
 747                 }
 748                 cfg80211_sme_free(wdev);
 749                 return;
 750         }
 751
 752         if (WARN_ON(!cr->bss))
 753                 return;
 754
 755         wdev->current_bss = bss_from_pub(cr->bss);
 756
 757         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 758                 cfg80211_upload_connect_keys(wdev);
 759
 760         rcu_read_lock();
 761         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
 762         if (!country_ie) {
 763                 rcu_read_unlock();
 764                 return;
 765         }
 766
 767         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 768         rcu_read_unlock();
 769
 770         if (!country_ie)
 771                 return;
 772
 773         /*
 774          * ieee80211_bss_get_ie() ensures we can access:
 775          * - country_ie + 2, the start of the country ie data, and
 776          * - and country_ie[1] which is the IE length
 777          */
 778         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
 779                                    country_ie + 2, country_ie[1]);
 780         kfree(country_ie);
 781 }
 782
 783 /* Consumes bss object one way or another */
 784 void cfg80211_connect_done(struct net_device *dev,
 785                            struct cfg80211_connect_resp_params *params,
 786                            gfp_t gfp)
 787 {
 788         struct wireless_dev *wdev = dev->ieee80211_ptr;
 789         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 790         struct cfg80211_event *ev;
 791         unsigned long flags;
 792         u8 *next;
 793
 794         if (params->bss) {
 795                 /* Make sure the bss entry provided by the driver is valid. */
 796                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
 797
 798                 if (WARN_ON(list_empty(&ibss->list))) {
 799                         cfg80211_put_bss(wdev->wiphy, params->bss);
 800                         return;
 801                 }
 802         }
 803
 804         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
 805                      params->req_ie_len + params->resp_ie_len +
 806                      params->fils_kek_len + params->pmk_len +
 807                      (params->pmkid ? WLAN_PMKID_LEN : 0), gfp);
 808         if (!ev) {
 809                 cfg80211_put_bss(wdev->wiphy, params->bss);
 810                 return;
 811         }
 812
 813         ev->type = EVENT_CONNECT_RESULT;
 814         next = ((u8 *)ev) + sizeof(*ev);
 815         if (params->bssid) {
 816                 ev->cr.bssid = next;
 817                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
 818                 next += ETH_ALEN;
 819         }
 820         if (params->req_ie_len) {
 821                 ev->cr.req_ie = next;
 822                 ev->cr.req_ie_len = params->req_ie_len;
 823                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 824                        params->req_ie_len);
 825                 next += params->req_ie_len;
 826         }
 827         if (params->resp_ie_len) {
 828                 ev->cr.resp_ie = next;
 829                 ev->cr.resp_ie_len = params->resp_ie_len;
 830                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 831                        params->resp_ie_len);
 832                 next += params->resp_ie_len;
 833         }
 834         if (params->fils_kek_len) {
 835                 ev->cr.fils_kek = next;
 836                 ev->cr.fils_kek_len = params->fils_kek_len;
 837                 memcpy((void *)ev->cr.fils_kek, params->fils_kek,
 838                        params->fils_kek_len);
 839                 next += params->fils_kek_len;
 840         }
 841         if (params->pmk_len) {
 842                 ev->cr.pmk = next;
 843                 ev->cr.pmk_len = params->pmk_len;
 844                 memcpy((void *)ev->cr.pmk, params->pmk, params->pmk_len);
 845                 next += params->pmk_len;
 846         }
 847         if (params->pmkid) {
 848                 ev->cr.pmkid = next;
 849                 memcpy((void *)ev->cr.pmkid, params->pmkid, WLAN_PMKID_LEN);
 850                 next += WLAN_PMKID_LEN;
 851         }
 852         ev->cr.update_erp_next_seq_num = params->update_erp_next_seq_num;
 853         if (params->update_erp_next_seq_num)
 854                 ev->cr.fils_erp_next_seq_num = params->fils_erp_next_seq_num;
 855         if (params->bss)
 856                 cfg80211_hold_bss(bss_from_pub(params->bss));
 857         ev->cr.bss = params->bss;
 858         ev->cr.status = params->status;
 859         ev->cr.timeout_reason = params->timeout_reason;
 860
 861         spin_lock_irqsave(&wdev->event_lock, flags);
 862         list_add_tail(&ev->list, &wdev->event_list);
 863         spin_unlock_irqrestore(&wdev->event_lock, flags);
 864         queue_work(cfg80211_wq, &rdev->event_work);
 865 }
 866 EXPORT_SYMBOL(cfg80211_connect_done);
 867
 868 /* Consumes bss object one way or another */
 869 void __cfg80211_roamed(struct wireless_dev *wdev,
 870                        struct cfg80211_roam_info *info)
 871 {
 872 #ifdef CONFIG_CFG80211_WEXT
 873         union iwreq_data wrqu;
 874 #endif
 875         ASSERT_WDEV_LOCK(wdev);
 876
 877         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 878                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 879                 goto out;
 880
 881         if (WARN_ON(!wdev->current_bss))
 882                 goto out;
 883
 884         cfg80211_unhold_bss(wdev->current_bss);
 885         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 886         wdev->current_bss = NULL;
 887
 888         if (WARN_ON(!info->bss))
 889                 return;
 890
 891         cfg80211_hold_bss(bss_from_pub(info->bss));
 892         wdev->current_bss = bss_from_pub(info->bss);
 893
 894         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 895                             wdev->netdev, info, GFP_KERNEL);
 896
 897 #ifdef CONFIG_CFG80211_WEXT
 898         if (info->req_ie) {
 899                 memset(&wrqu, 0, sizeof(wrqu));
 900                 wrqu.data.length = info->req_ie_len;
 901                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 902                                     &wrqu, info->req_ie);
 903         }
 904
 905         if (info->resp_ie) {
 906                 memset(&wrqu, 0, sizeof(wrqu));
 907                 wrqu.data.length = info->resp_ie_len;
 908                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 909                                     &wrqu, info->resp_ie);
 910         }
 911
 912         memset(&wrqu, 0, sizeof(wrqu));
 913         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 914         memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
 915         memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
 916         wdev->wext.prev_bssid_valid = true;
 917         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 918 #endif
 919
 920         return;
 921 out:
 922         cfg80211_put_bss(wdev->wiphy, info->bss);
 923 }
 924
 925 /* Consumes info->bss object one way or another */
 926 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
 927                      gfp_t gfp)
 928 {
 929         struct wireless_dev *wdev = dev->ieee80211_ptr;
 930         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 931         struct cfg80211_event *ev;
 932         unsigned long flags;
 933
 934         if (!info->bss) {
 935                 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
 936                                              info->bssid, wdev->ssid,
 937                                              wdev->ssid_len,
 938                                              wdev->conn_bss_type,
 939                                              IEEE80211_PRIVACY_ANY);
 940         }
 941
 942         if (WARN_ON(!info->bss))
 943                 return;
 944
 945         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len, gfp);
 946         if (!ev) {
 947                 cfg80211_put_bss(wdev->wiphy, info->bss);
 948                 return;
 949         }
 950
 951         ev->type = EVENT_ROAMED;
 952         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 953         ev->rm.req_ie_len = info->req_ie_len;
 954         memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
 955         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + info->req_ie_len;
 956         ev->rm.resp_ie_len = info->resp_ie_len;
 957         memcpy((void *)ev->rm.resp_ie, info->resp_ie, info->resp_ie_len);
 958         ev->rm.bss = info->bss;
 959         ev->rm.authorized = info->authorized;
 960
 961         spin_lock_irqsave(&wdev->event_lock, flags);
 962         list_add_tail(&ev->list, &wdev->event_list);
 963         spin_unlock_irqrestore(&wdev->event_lock, flags);
 964         queue_work(cfg80211_wq, &rdev->event_work);
 965 }
 966 EXPORT_SYMBOL(cfg80211_roamed);
 967
 968 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 969                              size_t ie_len, u16 reason, bool from_ap)
 970 {
 971         struct wireless_dev *wdev = dev->ieee80211_ptr;
 972         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 973         int i;
 974 #ifdef CONFIG_CFG80211_WEXT
 975         union iwreq_data wrqu;
 976 #endif
 977
 978         ASSERT_WDEV_LOCK(wdev);
 979
 980         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 981                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 982                 return;
 983
 984         if (wdev->current_bss) {
 985                 cfg80211_unhold_bss(wdev->current_bss);
 986                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 987         }
 988
 989         wdev->current_bss = NULL;
 990         wdev->ssid_len = 0;
 991         wdev->conn_owner_nlportid = 0;
 992
 993         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 994
 995         /* stop critical protocol if supported */
 996         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
 997                 rdev->crit_proto_nlportid = 0;
 998                 rdev_crit_proto_stop(rdev, wdev);
 999         }
1000
1001         /*
1002          * Delete all the keys ... pairwise keys can't really
1003          * exist any more anyway, but default keys might.
1004          */
1005         if (rdev->ops->del_key)
1006                 for (i = 0; i < 6; i++)
1007                         rdev_del_key(rdev, dev, i, false, NULL);
1008
1009         rdev_set_qos_map(rdev, dev, NULL);
1010
1011 #ifdef CONFIG_CFG80211_WEXT
1012         memset(&wrqu, 0, sizeof(wrqu));
1013         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1014         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1015         wdev->wext.connect.ssid_len = 0;
1016 #endif
1017
1018         schedule_work(&cfg80211_disconnect_work);
1019 }
1020
1021 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1022                            const u8 *ie, size_t ie_len,
1023                            bool locally_generated, gfp_t gfp)
1024 {
1025         struct wireless_dev *wdev = dev->ieee80211_ptr;
1026         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1027         struct cfg80211_event *ev;
1028         unsigned long flags;
1029
1030         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1031         if (!ev)
1032                 return;
1033
1034         ev->type = EVENT_DISCONNECTED;
1035         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1036         ev->dc.ie_len = ie_len;
1037         memcpy((void *)ev->dc.ie, ie, ie_len);
1038         ev->dc.reason = reason;
1039         ev->dc.locally_generated = locally_generated;
1040
1041         spin_lock_irqsave(&wdev->event_lock, flags);
1042         list_add_tail(&ev->list, &wdev->event_list);
1043         spin_unlock_irqrestore(&wdev->event_lock, flags);
1044         queue_work(cfg80211_wq, &rdev->event_work);
1045 }
1046 EXPORT_SYMBOL(cfg80211_disconnected);
1047
1048 /*
1049  * API calls for nl80211/wext compatibility code
1050  */
1051 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1052                      struct net_device *dev,
1053                      struct cfg80211_connect_params *connect,
1054                      struct cfg80211_cached_keys *connkeys,
1055                      const u8 *prev_bssid)
1056 {
1057         struct wireless_dev *wdev = dev->ieee80211_ptr;
1058         int err;
1059
1060         ASSERT_WDEV_LOCK(wdev);
1061
1062         /*
1063          * If we have an ssid_len, we're trying to connect or are
1064          * already connected, so reject a new SSID unless it's the
1065          * same (which is the case for re-association.)
1066          */
1067         if (wdev->ssid_len &&
1068             (wdev->ssid_len != connect->ssid_len ||
1069              memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1070                 return -EALREADY;
1071
1072         /*
1073          * If connected, reject (re-)association unless prev_bssid
1074          * matches the current BSSID.
1075          */
1076         if (wdev->current_bss) {
1077                 if (!prev_bssid)
1078                         return -EALREADY;
1079                 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1080                         return -ENOTCONN;
1081         }
1082
1083         /*
1084          * Reject if we're in the process of connecting with WEP,
1085          * this case isn't very interesting and trying to handle
1086          * it would make the code much more complex.
1087          */
1088         if (wdev->connect_keys)
1089                 return -EINPROGRESS;
1090
1091         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1092                                   rdev->wiphy.ht_capa_mod_mask);
1093
1094         if (connkeys && connkeys->def >= 0) {
1095                 int idx;
1096                 u32 cipher;
1097
1098                 idx = connkeys->def;
1099                 cipher = connkeys->params[idx].cipher;
1100                 /* If given a WEP key we may need it for shared key auth */
1101                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1102                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1103                         connect->key_idx = idx;
1104                         connect->key = connkeys->params[idx].key;
1105                         connect->key_len = connkeys->params[idx].key_len;
1106
1107                         /*
1108                          * If ciphers are not set (e.g. when going through
1109                          * iwconfig), we have to set them appropriately here.
1110                          */
1111                         if (connect->crypto.cipher_group == 0)
1112                                 connect->crypto.cipher_group = cipher;
1113
1114                         if (connect->crypto.n_ciphers_pairwise == 0) {
1115                                 connect->crypto.n_ciphers_pairwise = 1;
1116                                 connect->crypto.ciphers_pairwise[0] = cipher;
1117                         }
1118                 }
1119
1120                 connect->crypto.wep_keys = connkeys->params;
1121                 connect->crypto.wep_tx_key = connkeys->def;
1122         } else {
1123                 if (WARN_ON(connkeys))
1124                         return -EINVAL;
1125         }
1126
1127         wdev->connect_keys = connkeys;
1128         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1129         wdev->ssid_len = connect->ssid_len;
1130
1131         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1132                                               IEEE80211_BSS_TYPE_ESS;
1133
1134         if (!rdev->ops->connect)
1135                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1136         else
1137                 err = rdev_connect(rdev, dev, connect);
1138
1139         if (err) {
1140                 wdev->connect_keys = NULL;
1141                 /*
1142                  * This could be reassoc getting refused, don't clear
1143                  * ssid_len in that case.
1144                  */
1145                 if (!wdev->current_bss)
1146                         wdev->ssid_len = 0;
1147                 return err;
1148         }
1149
1150         return 0;
1151 }
1152
1153 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1154                         struct net_device *dev, u16 reason, bool wextev)
1155 {
1156         struct wireless_dev *wdev = dev->ieee80211_ptr;
1157         int err = 0;
1158
1159         ASSERT_WDEV_LOCK(wdev);
1160
1161         kzfree(wdev->connect_keys);
1162         wdev->connect_keys = NULL;
1163
1164         wdev->conn_owner_nlportid = 0;
1165
1166         if (wdev->conn)
1167                 err = cfg80211_sme_disconnect(wdev, reason);
1168         else if (!rdev->ops->disconnect)
1169                 cfg80211_mlme_down(rdev, dev);
1170         else if (wdev->ssid_len)
1171                 err = rdev_disconnect(rdev, dev, reason);
1172
1173         /*
1174          * Clear ssid_len unless we actually were fully connected,
1175          * in which case cfg80211_disconnected() will take care of
1176          * this later.
1177          */
1178         if (!wdev->current_bss)
1179                 wdev->ssid_len = 0;
1180
1181         return err;
1182 }
1183
1184 /*
1185  * Used to clean up after the connection / connection attempt owner socket
1186  * disconnects
1187  */
1188 void cfg80211_autodisconnect_wk(struct work_struct *work)
1189 {
1190         struct wireless_dev *wdev =
1191                 container_of(work, struct wireless_dev, disconnect_wk);
1192         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1193
1194         wdev_lock(wdev);
1195
1196         if (wdev->conn_owner_nlportid) {
1197                 /*
1198                  * Use disconnect_bssid if still connecting and ops->disconnect
1199                  * not implemented.  Otherwise we can use cfg80211_disconnect.
1200                  */
1201                 if (rdev->ops->disconnect || wdev->current_bss)
1202                         cfg80211_disconnect(rdev, wdev->netdev,
1203                                             WLAN_REASON_DEAUTH_LEAVING, true);
1204                 else
1205                         cfg80211_mlme_deauth(rdev, wdev->netdev,
1206                                              wdev->disconnect_bssid, NULL, 0,
1207                                              WLAN_REASON_DEAUTH_LEAVING, false);
1208         }
1209
1210         wdev_unlock(wdev);
1211 }