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