net/wireless/sme.c

   1 /*
   2  * SME code for cfg80211's connect emulation.
   3  *
   4  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/etherdevice.h>
   9 #include <linux/if_arp.h>
  10 #include <linux/workqueue.h>
  11 #include <net/cfg80211.h>
  12 #include <net/rtnetlink.h>
  13 #include "nl80211.h"
  14
  15 struct cfg80211_conn {
  16         struct cfg80211_connect_params params;
  17         /* these are sub-states of the _CONNECTING sme_state */
  18         enum {
  19                 CFG80211_CONN_IDLE,
  20                 CFG80211_CONN_SCANNING,
  21                 CFG80211_CONN_SCAN_AGAIN,
  22                 CFG80211_CONN_AUTHENTICATE_NEXT,
  23                 CFG80211_CONN_AUTHENTICATING,
  24                 CFG80211_CONN_ASSOCIATE_NEXT,
  25                 CFG80211_CONN_ASSOCIATING,
  26         } state;
  27         u8 bssid[ETH_ALEN];
  28         u8 *ie;
  29         size_t ie_len;
  30         bool auto_auth;
  31 };
  32
  33
  34 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  35 {
  36         struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
  37         struct cfg80211_scan_request *request;
  38         int n_channels, err;
  39
  40         ASSERT_RTNL();
  41
  42         if (drv->scan_req)
  43                 return -EBUSY;
  44
  45         if (wdev->conn->params.channel) {
  46                 n_channels = 1;
  47         } else {
  48                 enum ieee80211_band band;
  49                 n_channels = 0;
  50
  51                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  52                         if (!wdev->wiphy->bands[band])
  53                                 continue;
  54                         n_channels += wdev->wiphy->bands[band]->n_channels;
  55                 }
  56         }
  57         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  58                           sizeof(request->channels[0]) * n_channels,
  59                           GFP_KERNEL);
  60         if (!request)
  61                 return -ENOMEM;
  62
  63         request->channels = (void *)((char *)request + sizeof(*request));
  64         if (wdev->conn->params.channel)
  65                 request->channels[0] = wdev->conn->params.channel;
  66         else {
  67                 int i = 0, j;
  68                 enum ieee80211_band band;
  69
  70                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  71                         if (!wdev->wiphy->bands[band])
  72                                 continue;
  73                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
  74                              i++, j++)
  75                                 request->channels[i] =
  76                                         &wdev->wiphy->bands[band]->channels[j];
  77                 }
  78         }
  79         request->n_channels = n_channels;
  80         request->ssids = (void *)(request->channels + n_channels);
  81         request->n_ssids = 1;
  82
  83         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
  84                 wdev->conn->params.ssid_len);
  85         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
  86
  87         request->ifidx = wdev->netdev->ifindex;
  88         request->wiphy = &drv->wiphy;
  89
  90         drv->scan_req = request;
  91
  92         err = drv->ops->scan(wdev->wiphy, wdev->netdev, request);
  93         if (!err) {
  94                 wdev->conn->state = CFG80211_CONN_SCANNING;
  95                 nl80211_send_scan_start(drv, wdev->netdev);
  96         } else {
  97                 drv->scan_req = NULL;
  98                 kfree(request);
  99         }
 100         return err;
 101 }
 102
 103 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 104 {
 105         struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
 106         union {
 107                 struct cfg80211_auth_request auth_req;
 108                 struct cfg80211_assoc_request assoc_req;
 109         } u;
 110
 111         memset(&u, 0, sizeof(u));
 112
 113         if (!wdev->conn)
 114                 return 0;
 115
 116         switch (wdev->conn->state) {
 117         case CFG80211_CONN_SCAN_AGAIN:
 118                 return cfg80211_conn_scan(wdev);
 119         case CFG80211_CONN_AUTHENTICATE_NEXT:
 120                 u.auth_req.chan = wdev->conn->params.channel;
 121                 u.auth_req.peer_addr = wdev->conn->params.bssid;
 122                 u.auth_req.ssid = wdev->conn->params.ssid;
 123                 u.auth_req.ssid_len = wdev->conn->params.ssid_len;
 124                 u.auth_req.auth_type = wdev->conn->params.auth_type;
 125                 u.auth_req.ie = NULL;
 126                 u.auth_req.ie_len = 0;
 127                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 128                 BUG_ON(!drv->ops->auth);
 129                 return drv->ops->auth(wdev->wiphy, wdev->netdev, &u.auth_req);
 130         case CFG80211_CONN_ASSOCIATE_NEXT:
 131                 u.assoc_req.chan = wdev->conn->params.channel;
 132                 u.assoc_req.peer_addr = wdev->conn->params.bssid;
 133                 u.assoc_req.ssid = wdev->conn->params.ssid;
 134                 u.assoc_req.ssid_len = wdev->conn->params.ssid_len;
 135                 u.assoc_req.ie = wdev->conn->params.ie;
 136                 u.assoc_req.ie_len = wdev->conn->params.ie_len;
 137                 u.assoc_req.use_mfp = false;
 138                 memcpy(&u.assoc_req.crypto, &wdev->conn->params.crypto,
 139                         sizeof(u.assoc_req.crypto));
 140                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 141                 BUG_ON(!drv->ops->assoc);
 142                 return drv->ops->assoc(wdev->wiphy, wdev->netdev,
 143                                         &u.assoc_req);
 144         default:
 145                 return 0;
 146         }
 147 }
 148
 149 void cfg80211_conn_work(struct work_struct *work)
 150 {
 151         struct cfg80211_registered_device *drv =
 152                 container_of(work, struct cfg80211_registered_device, conn_work);
 153         struct wireless_dev *wdev;
 154
 155         rtnl_lock();
 156         mutex_lock(&drv->devlist_mtx);
 157
 158         list_for_each_entry(wdev, &drv->netdev_list, list) {
 159                 if (!netif_running(wdev->netdev))
 160                         continue;
 161                 if (wdev->sme_state != CFG80211_SME_CONNECTING)
 162                         continue;
 163                 if (cfg80211_conn_do_work(wdev))
 164                         cfg80211_connect_result(wdev->netdev,
 165                                                 wdev->conn->params.bssid,
 166                                                 NULL, 0, NULL, 0,
 167                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 168                                                 GFP_ATOMIC);
 169         }
 170
 171         mutex_unlock(&drv->devlist_mtx);
 172         rtnl_unlock();
 173 }
 174
 175 static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
 176 {
 177         struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
 178         struct cfg80211_bss *bss;
 179         u16 capa = WLAN_CAPABILITY_ESS;
 180
 181         if (wdev->conn->params.privacy)
 182                 capa |= WLAN_CAPABILITY_PRIVACY;
 183
 184         bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
 185                                wdev->conn->params.ssid,
 186                                wdev->conn->params.ssid_len,
 187                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 188                                capa);
 189
 190         if (!bss)
 191                 return false;
 192
 193         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 194         wdev->conn->params.bssid = wdev->conn->bssid;
 195         wdev->conn->params.channel = bss->channel;
 196         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 197         schedule_work(&drv->conn_work);
 198
 199         cfg80211_put_bss(bss);
 200         return true;
 201 }
 202
 203 void cfg80211_sme_scan_done(struct net_device *dev)
 204 {
 205         struct wireless_dev *wdev = dev->ieee80211_ptr;
 206         struct cfg80211_registered_device *drv = wiphy_to_dev(wdev->wiphy);
 207
 208         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 209                 return;
 210
 211         if (WARN_ON(!wdev->conn))
 212                 return;
 213
 214         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 215             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 216                 return;
 217
 218         if (!cfg80211_get_conn_bss(wdev)) {
 219                 /* not found */
 220                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 221                         schedule_work(&drv->conn_work);
 222                 else
 223                         cfg80211_connect_result(dev, wdev->conn->params.bssid,
 224                                                 NULL, 0, NULL, 0,
 225                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 226                                                 GFP_ATOMIC);
 227                 return;
 228         }
 229 }
 230
 231 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
 232 {
 233         struct wireless_dev *wdev = dev->ieee80211_ptr;
 234         struct wiphy *wiphy = wdev->wiphy;
 235         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 236         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 237         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 238
 239         /* should only RX auth frames when connecting */
 240         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 241                 return;
 242
 243         if (WARN_ON(!wdev->conn))
 244                 return;
 245
 246         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 247             wdev->conn->auto_auth &&
 248             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 249                 /* select automatically between only open, shared, leap */
 250                 switch (wdev->conn->params.auth_type) {
 251                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 252                         wdev->conn->params.auth_type =
 253                                 NL80211_AUTHTYPE_SHARED_KEY;
 254                         break;
 255                 case NL80211_AUTHTYPE_SHARED_KEY:
 256                         wdev->conn->params.auth_type =
 257                                 NL80211_AUTHTYPE_NETWORK_EAP;
 258                         break;
 259                 default:
 260                         /* huh? */
 261                         wdev->conn->params.auth_type =
 262                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 263                         break;
 264                 }
 265                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 266                 schedule_work(&rdev->conn_work);
 267         } else if (status_code != WLAN_STATUS_SUCCESS)
 268                 wdev->sme_state = CFG80211_SME_IDLE;
 269         else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 270                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 271                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 272                 schedule_work(&rdev->conn_work);
 273         }
 274 }
 275
 276 static void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 277                                       const u8 *req_ie, size_t req_ie_len,
 278                                       const u8 *resp_ie, size_t resp_ie_len,
 279                                       u16 status, bool wextev, gfp_t gfp)
 280 {
 281         struct wireless_dev *wdev = dev->ieee80211_ptr;
 282         struct cfg80211_bss *bss;
 283 #ifdef CONFIG_WIRELESS_EXT
 284         union iwreq_data wrqu;
 285 #endif
 286
 287         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 288                 return;
 289
 290         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 291                 return;
 292
 293         if (wdev->current_bss) {
 294                 cfg80211_unhold_bss(wdev->current_bss);
 295                 cfg80211_put_bss(wdev->current_bss);
 296                 wdev->current_bss = NULL;
 297         }
 298
 299         if (status == WLAN_STATUS_SUCCESS) {
 300                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 301                                        wdev->ssid, wdev->ssid_len,
 302                                        WLAN_CAPABILITY_ESS,
 303                                        WLAN_CAPABILITY_ESS);
 304
 305                 if (WARN_ON(!bss))
 306                         return;
 307
 308                 cfg80211_hold_bss(bss);
 309                 wdev->current_bss = bss;
 310
 311                 wdev->sme_state = CFG80211_SME_CONNECTED;
 312         } else {
 313                 wdev->sme_state = CFG80211_SME_IDLE;
 314         }
 315
 316         if (wdev->conn)
 317                 wdev->conn->state = CFG80211_CONN_IDLE;
 318
 319         nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, bssid,
 320                                     req_ie, req_ie_len, resp_ie, resp_ie_len,
 321                                     status, gfp);
 322
 323 #ifdef CONFIG_WIRELESS_EXT
 324         if (wextev) {
 325                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 326                         memset(&wrqu, 0, sizeof(wrqu));
 327                         wrqu.data.length = req_ie_len;
 328                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
 329                 }
 330
 331                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 332                         memset(&wrqu, 0, sizeof(wrqu));
 333                         wrqu.data.length = resp_ie_len;
 334                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 335                 }
 336
 337                 memset(&wrqu, 0, sizeof(wrqu));
 338                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 339                 if (bssid && status == WLAN_STATUS_SUCCESS)
 340                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 341                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 342         }
 343 #endif
 344 }
 345
 346 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 347                              const u8 *req_ie, size_t req_ie_len,
 348                              const u8 *resp_ie, size_t resp_ie_len,
 349                              u16 status, gfp_t gfp)
 350 {
 351         bool wextev = status == WLAN_STATUS_SUCCESS;
 352         __cfg80211_connect_result(dev, bssid, req_ie, req_ie_len, resp_ie, resp_ie_len, status, wextev, gfp);
 353 }
 354 EXPORT_SYMBOL(cfg80211_connect_result);
 355
 356 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 357                      const u8 *req_ie, size_t req_ie_len,
 358                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 359 {
 360         struct wireless_dev *wdev = dev->ieee80211_ptr;
 361         struct cfg80211_bss *bss;
 362 #ifdef CONFIG_WIRELESS_EXT
 363         union iwreq_data wrqu;
 364 #endif
 365
 366         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 367                 return;
 368
 369         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 370                 return;
 371
 372         /* internal error -- how did we get to CONNECTED w/o BSS? */
 373         if (WARN_ON(!wdev->current_bss)) {
 374                 return;
 375         }
 376
 377         cfg80211_unhold_bss(wdev->current_bss);
 378         cfg80211_put_bss(wdev->current_bss);
 379         wdev->current_bss = NULL;
 380
 381         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 382                                wdev->ssid, wdev->ssid_len,
 383                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 384
 385         if (WARN_ON(!bss))
 386                 return;
 387
 388         cfg80211_hold_bss(bss);
 389         wdev->current_bss = bss;
 390
 391         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev, bssid,
 392                             req_ie, req_ie_len, resp_ie, resp_ie_len, gfp);
 393
 394 #ifdef CONFIG_WIRELESS_EXT
 395         if (req_ie) {
 396                 memset(&wrqu, 0, sizeof(wrqu));
 397                 wrqu.data.length = req_ie_len;
 398                 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
 399         }
 400
 401         if (resp_ie) {
 402                 memset(&wrqu, 0, sizeof(wrqu));
 403                 wrqu.data.length = resp_ie_len;
 404                 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 405         }
 406
 407         memset(&wrqu, 0, sizeof(wrqu));
 408         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 409         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 410         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 411 #endif
 412 }
 413 EXPORT_SYMBOL(cfg80211_roamed);
 414
 415 void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp, u8 *ie,
 416                              size_t ie_len, u16 reason, bool from_ap)
 417 {
 418         struct wireless_dev *wdev = dev->ieee80211_ptr;
 419 #ifdef CONFIG_WIRELESS_EXT
 420         union iwreq_data wrqu;
 421 #endif
 422
 423         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 424                 return;
 425
 426         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 427                 return;
 428
 429         if (wdev->current_bss) {
 430                 cfg80211_unhold_bss(wdev->current_bss);
 431                 cfg80211_put_bss(wdev->current_bss);
 432         }
 433
 434         wdev->current_bss = NULL;
 435         wdev->sme_state = CFG80211_SME_IDLE;
 436
 437         if (wdev->conn) {
 438                 kfree(wdev->conn->ie);
 439                 wdev->conn->ie = NULL;
 440         }
 441
 442         nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
 443                                   reason, ie, ie_len, from_ap, gfp);
 444
 445 #ifdef CONFIG_WIRELESS_EXT
 446         memset(&wrqu, 0, sizeof(wrqu));
 447         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 448         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 449 #endif
 450 }
 451
 452 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 453                            u8 *ie, size_t ie_len, gfp_t gfp)
 454 {
 455         __cfg80211_disconnected(dev, gfp, ie, ie_len, reason, true);
 456 }
 457 EXPORT_SYMBOL(cfg80211_disconnected);
 458
 459 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 460                      struct net_device *dev,
 461                      struct cfg80211_connect_params *connect)
 462 {
 463         int err;
 464         struct wireless_dev *wdev = dev->ieee80211_ptr;
 465
 466         if (wdev->sme_state != CFG80211_SME_IDLE)
 467                 return -EALREADY;
 468
 469         if (!rdev->ops->connect) {
 470                 if (!rdev->ops->auth || !rdev->ops->assoc)
 471                         return -EOPNOTSUPP;
 472
 473                 if (!wdev->conn) {
 474                         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 475                         if (!wdev->conn)
 476                                 return -ENOMEM;
 477                 } else
 478                         memset(wdev->conn, 0, sizeof(*wdev->conn));
 479
 480                 /*
 481                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 482                  */
 483                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 484                 if (connect->bssid) {
 485                         wdev->conn->params.bssid = wdev->conn->bssid;
 486                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 487                 }
 488
 489                 if (connect->ie) {
 490                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 491                                                 GFP_KERNEL);
 492                         wdev->conn->params.ie = wdev->conn->ie;
 493                         if (!wdev->conn->ie)
 494                                 return -ENOMEM;
 495                 }
 496
 497                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 498                         wdev->conn->auto_auth = true;
 499                         /* start with open system ... should mostly work */
 500                         wdev->conn->params.auth_type =
 501                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 502                 } else {
 503                         wdev->conn->auto_auth = false;
 504                 }
 505
 506                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 507                 wdev->ssid_len = connect->ssid_len;
 508                 wdev->conn->params.ssid = wdev->ssid;
 509                 wdev->conn->params.ssid_len = connect->ssid_len;
 510
 511                 /* don't care about result -- but fill bssid & channel */
 512                 if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
 513                         cfg80211_get_conn_bss(wdev);
 514
 515                 wdev->sme_state = CFG80211_SME_CONNECTING;
 516
 517                 /* we're good if we have both BSSID and channel */
 518                 if (wdev->conn->params.bssid && wdev->conn->params.channel) {
 519                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 520                         err = cfg80211_conn_do_work(wdev);
 521                 } else {
 522                         /* otherwise we'll need to scan for the AP first */
 523                         err = cfg80211_conn_scan(wdev);
 524                         /*
 525                          * If we can't scan right now, then we need to scan again
 526                          * after the current scan finished, since the parameters
 527                          * changed (unless we find a good AP anyway).
 528                          */
 529                         if (err == -EBUSY) {
 530                                 err = 0;
 531                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 532                         }
 533                 }
 534                 if (err)
 535                         wdev->sme_state = CFG80211_SME_IDLE;
 536
 537                 return err;
 538         } else {
 539                 wdev->sme_state = CFG80211_SME_CONNECTING;
 540                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 541                 if (err) {
 542                         wdev->sme_state = CFG80211_SME_IDLE;
 543                         return err;
 544                 }
 545
 546                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 547                 wdev->ssid_len = connect->ssid_len;
 548
 549                 return 0;
 550         }
 551 }
 552
 553 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 554                         struct net_device *dev, u16 reason, bool wextev)
 555 {
 556         struct wireless_dev *wdev = dev->ieee80211_ptr;
 557         int err;
 558
 559         if (wdev->sme_state == CFG80211_SME_IDLE)
 560                 return -EINVAL;
 561
 562         if (!rdev->ops->disconnect) {
 563                 struct cfg80211_deauth_request deauth;
 564                 u8 bssid[ETH_ALEN];
 565
 566                 /* internal bug. */
 567                 if (WARN_ON(!wdev->conn))
 568                         return -EINVAL;
 569
 570                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 571                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 572                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 573                         wdev->sme_state = CFG80211_SME_IDLE;
 574                         return 0;
 575                 }
 576
 577                 if (!rdev->ops->deauth)
 578                         return -EOPNOTSUPP;
 579
 580                 memset(&deauth, 0, sizeof(deauth));
 581
 582                 /* wdev->conn->params.bssid must be set if > SCANNING */
 583                 memcpy(bssid, wdev->conn->params.bssid, ETH_ALEN);
 584                 deauth.peer_addr = bssid;
 585                 deauth.reason_code = reason;
 586
 587                 err = rdev->ops->deauth(&rdev->wiphy, dev, &deauth);
 588                 if (err)
 589                         return err;
 590         } else {
 591                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 592                 if (err)
 593                         return err;
 594         }
 595
 596         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 597                 __cfg80211_disconnected(dev, GFP_KERNEL, NULL, 0, 0, false);
 598         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 599                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 600                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 601                                           wextev, GFP_KERNEL);
 602
 603         return 0;
 604 }