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 <linux/wireless.h>
  12 #include <net/iw_handler.h>
  13 #include <net/cfg80211.h>
  14 #include <net/rtnetlink.h>
  15 #include "nl80211.h"
  16
  17 struct cfg80211_conn {
  18         struct cfg80211_connect_params params;
  19         /* these are sub-states of the _CONNECTING sme_state */
  20         enum {
  21                 CFG80211_CONN_IDLE,
  22                 CFG80211_CONN_SCANNING,
  23                 CFG80211_CONN_SCAN_AGAIN,
  24                 CFG80211_CONN_AUTHENTICATE_NEXT,
  25                 CFG80211_CONN_AUTHENTICATING,
  26                 CFG80211_CONN_ASSOCIATE_NEXT,
  27                 CFG80211_CONN_ASSOCIATING,
  28         } state;
  29         u8 bssid[ETH_ALEN];
  30         u8 *ie;
  31         size_t ie_len;
  32         bool auto_auth;
  33 };
  34
  35
  36 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  37 {
  38         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  39         struct cfg80211_scan_request *request;
  40         int n_channels, err;
  41
  42         ASSERT_RTNL();
  43         ASSERT_RDEV_LOCK(rdev);
  44         ASSERT_WDEV_LOCK(wdev);
  45
  46         if (rdev->scan_req)
  47                 return -EBUSY;
  48
  49         if (wdev->conn->params.channel) {
  50                 n_channels = 1;
  51         } else {
  52                 enum ieee80211_band band;
  53                 n_channels = 0;
  54
  55                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  56                         if (!wdev->wiphy->bands[band])
  57                                 continue;
  58                         n_channels += wdev->wiphy->bands[band]->n_channels;
  59                 }
  60         }
  61         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  62                           sizeof(request->channels[0]) * n_channels,
  63                           GFP_KERNEL);
  64         if (!request)
  65                 return -ENOMEM;
  66
  67         request->channels = (void *)((char *)request + sizeof(*request));
  68         if (wdev->conn->params.channel)
  69                 request->channels[0] = wdev->conn->params.channel;
  70         else {
  71                 int i = 0, j;
  72                 enum ieee80211_band band;
  73
  74                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  75                         if (!wdev->wiphy->bands[band])
  76                                 continue;
  77                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
  78                              i++, j++)
  79                                 request->channels[i] =
  80                                         &wdev->wiphy->bands[band]->channels[j];
  81                 }
  82         }
  83         request->n_channels = n_channels;
  84         request->ssids = (void *)(request->channels + n_channels);
  85         request->n_ssids = 1;
  86
  87         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
  88                 wdev->conn->params.ssid_len);
  89         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
  90
  91         request->dev = wdev->netdev;
  92         request->wiphy = &rdev->wiphy;
  93
  94         rdev->scan_req = request;
  95
  96         err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
  97         if (!err) {
  98                 wdev->conn->state = CFG80211_CONN_SCANNING;
  99                 nl80211_send_scan_start(rdev, wdev->netdev);
 100                 dev_hold(wdev->netdev);
 101         } else {
 102                 rdev->scan_req = NULL;
 103                 kfree(request);
 104         }
 105         return err;
 106 }
 107
 108 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 109 {
 110         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 111         struct cfg80211_connect_params *params;
 112         int err;
 113
 114         ASSERT_WDEV_LOCK(wdev);
 115
 116         if (!wdev->conn)
 117                 return 0;
 118
 119         params = &wdev->conn->params;
 120
 121         switch (wdev->conn->state) {
 122         case CFG80211_CONN_SCAN_AGAIN:
 123                 return cfg80211_conn_scan(wdev);
 124         case CFG80211_CONN_AUTHENTICATE_NEXT:
 125                 BUG_ON(!rdev->ops->auth);
 126                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 127                 return __cfg80211_mlme_auth(rdev, wdev->netdev,
 128                                             params->channel, params->auth_type,
 129                                             params->bssid,
 130                                             params->ssid, params->ssid_len,
 131                                             NULL, 0,
 132                                             params->key, params->key_len,
 133                                             params->key_idx);
 134         case CFG80211_CONN_ASSOCIATE_NEXT:
 135                 BUG_ON(!rdev->ops->assoc);
 136                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 137                 /*
 138                  * We could, later, implement roaming here and then actually
 139                  * set prev_bssid to non-NULL. But then we need to be aware
 140                  * that some APs don't like that -- so we'd need to retry
 141                  * the association.
 142                  */
 143                 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
 144                                             params->channel, params->bssid,
 145                                             NULL,
 146                                             params->ssid, params->ssid_len,
 147                                             params->ie, params->ie_len,
 148                                             false, &params->crypto);
 149                 if (err)
 150                         __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 151                                                NULL, 0,
 152                                                WLAN_REASON_DEAUTH_LEAVING);
 153                 return err;
 154         default:
 155                 return 0;
 156         }
 157 }
 158
 159 void cfg80211_conn_work(struct work_struct *work)
 160 {
 161         struct cfg80211_registered_device *rdev =
 162                 container_of(work, struct cfg80211_registered_device, conn_work);
 163         struct wireless_dev *wdev;
 164
 165         rtnl_lock();
 166         cfg80211_lock_rdev(rdev);
 167         mutex_lock(&rdev->devlist_mtx);
 168
 169         list_for_each_entry(wdev, &rdev->netdev_list, list) {
 170                 wdev_lock(wdev);
 171                 if (!netif_running(wdev->netdev)) {
 172                         wdev_unlock(wdev);
 173                         continue;
 174                 }
 175                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 176                         wdev_unlock(wdev);
 177                         continue;
 178                 }
 179                 if (cfg80211_conn_do_work(wdev))
 180                         __cfg80211_connect_result(
 181                                         wdev->netdev,
 182                                         wdev->conn->params.bssid,
 183                                         NULL, 0, NULL, 0,
 184                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 185                                         false);
 186                 wdev_unlock(wdev);
 187         }
 188
 189         mutex_unlock(&rdev->devlist_mtx);
 190         cfg80211_unlock_rdev(rdev);
 191         rtnl_unlock();
 192 }
 193
 194 static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
 195 {
 196         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 197         struct cfg80211_bss *bss;
 198         u16 capa = WLAN_CAPABILITY_ESS;
 199
 200         ASSERT_WDEV_LOCK(wdev);
 201
 202         if (wdev->conn->params.privacy)
 203                 capa |= WLAN_CAPABILITY_PRIVACY;
 204
 205         bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
 206                                wdev->conn->params.ssid,
 207                                wdev->conn->params.ssid_len,
 208                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 209                                capa);
 210         if (!bss)
 211                 return false;
 212
 213         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 214         wdev->conn->params.bssid = wdev->conn->bssid;
 215         wdev->conn->params.channel = bss->channel;
 216         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 217         schedule_work(&rdev->conn_work);
 218
 219         cfg80211_put_bss(bss);
 220         return true;
 221 }
 222
 223 static void __cfg80211_sme_scan_done(struct net_device *dev)
 224 {
 225         struct wireless_dev *wdev = dev->ieee80211_ptr;
 226         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 227
 228         ASSERT_WDEV_LOCK(wdev);
 229
 230         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 231                 return;
 232
 233         if (!wdev->conn)
 234                 return;
 235
 236         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 237             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 238                 return;
 239
 240         if (!cfg80211_get_conn_bss(wdev)) {
 241                 /* not found */
 242                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 243                         schedule_work(&rdev->conn_work);
 244                 else
 245                         __cfg80211_connect_result(
 246                                         wdev->netdev,
 247                                         wdev->conn->params.bssid,
 248                                         NULL, 0, NULL, 0,
 249                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 250                                         false);
 251         }
 252 }
 253
 254 void cfg80211_sme_scan_done(struct net_device *dev)
 255 {
 256         struct wireless_dev *wdev = dev->ieee80211_ptr;
 257
 258         wdev_lock(wdev);
 259         __cfg80211_sme_scan_done(dev);
 260         wdev_unlock(wdev);
 261 }
 262
 263 void cfg80211_sme_rx_auth(struct net_device *dev,
 264                           const u8 *buf, size_t len)
 265 {
 266         struct wireless_dev *wdev = dev->ieee80211_ptr;
 267         struct wiphy *wiphy = wdev->wiphy;
 268         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 269         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 270         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 271
 272         ASSERT_WDEV_LOCK(wdev);
 273
 274         /* should only RX auth frames when connecting */
 275         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 276                 return;
 277
 278         if (WARN_ON(!wdev->conn))
 279                 return;
 280
 281         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 282             wdev->conn->auto_auth &&
 283             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 284                 /* select automatically between only open, shared, leap */
 285                 switch (wdev->conn->params.auth_type) {
 286                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 287                         if (wdev->connect_keys)
 288                                 wdev->conn->params.auth_type =
 289                                         NL80211_AUTHTYPE_SHARED_KEY;
 290                         else
 291                                 wdev->conn->params.auth_type =
 292                                         NL80211_AUTHTYPE_NETWORK_EAP;
 293                         break;
 294                 case NL80211_AUTHTYPE_SHARED_KEY:
 295                         wdev->conn->params.auth_type =
 296                                 NL80211_AUTHTYPE_NETWORK_EAP;
 297                         break;
 298                 default:
 299                         /* huh? */
 300                         wdev->conn->params.auth_type =
 301                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 302                         break;
 303                 }
 304                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 305                 schedule_work(&rdev->conn_work);
 306         } else if (status_code != WLAN_STATUS_SUCCESS) {
 307                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 308                                           status_code, false);
 309         } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 310                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 311                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 312                 schedule_work(&rdev->conn_work);
 313         }
 314 }
 315
 316 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 317                                const u8 *req_ie, size_t req_ie_len,
 318                                const u8 *resp_ie, size_t resp_ie_len,
 319                                u16 status, bool wextev)
 320 {
 321         struct wireless_dev *wdev = dev->ieee80211_ptr;
 322         struct cfg80211_bss *bss;
 323 #ifdef CONFIG_WIRELESS_EXT
 324         union iwreq_data wrqu;
 325 #endif
 326
 327         ASSERT_WDEV_LOCK(wdev);
 328
 329         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 330                 return;
 331
 332         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 333                 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
 334                                     bssid, req_ie, req_ie_len,
 335                                     resp_ie, resp_ie_len, GFP_KERNEL);
 336         else
 337                 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 338                                             bssid, req_ie, req_ie_len,
 339                                             resp_ie, resp_ie_len,
 340                                             status, GFP_KERNEL);
 341
 342 #ifdef CONFIG_WIRELESS_EXT
 343         if (wextev) {
 344                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 345                         memset(&wrqu, 0, sizeof(wrqu));
 346                         wrqu.data.length = req_ie_len;
 347                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 348                 }
 349
 350                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 351                         memset(&wrqu, 0, sizeof(wrqu));
 352                         wrqu.data.length = resp_ie_len;
 353                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 354                 }
 355
 356                 memset(&wrqu, 0, sizeof(wrqu));
 357                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 358                 if (bssid && status == WLAN_STATUS_SUCCESS)
 359                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 360                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 361         }
 362 #endif
 363
 364         if (status == WLAN_STATUS_SUCCESS &&
 365             wdev->sme_state == CFG80211_SME_IDLE)
 366                 goto success;
 367
 368         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 369                 return;
 370
 371         if (wdev->current_bss) {
 372                 cfg80211_unhold_bss(wdev->current_bss);
 373                 cfg80211_put_bss(&wdev->current_bss->pub);
 374                 wdev->current_bss = NULL;
 375         }
 376
 377         if (wdev->conn)
 378                 wdev->conn->state = CFG80211_CONN_IDLE;
 379
 380         if (status != WLAN_STATUS_SUCCESS) {
 381                 wdev->sme_state = CFG80211_SME_IDLE;
 382                 kfree(wdev->conn);
 383                 wdev->conn = NULL;
 384                 kfree(wdev->connect_keys);
 385                 wdev->connect_keys = NULL;
 386                 return;
 387         }
 388
 389         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 390                                wdev->ssid, wdev->ssid_len,
 391                                WLAN_CAPABILITY_ESS,
 392                                WLAN_CAPABILITY_ESS);
 393
 394         if (WARN_ON(!bss))
 395                 return;
 396
 397         cfg80211_hold_bss(bss_from_pub(bss));
 398         wdev->current_bss = bss_from_pub(bss);
 399
 400  success:
 401         wdev->sme_state = CFG80211_SME_CONNECTED;
 402         cfg80211_upload_connect_keys(wdev);
 403 }
 404
 405 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 406                              const u8 *req_ie, size_t req_ie_len,
 407                              const u8 *resp_ie, size_t resp_ie_len,
 408                              u16 status, gfp_t gfp)
 409 {
 410         struct wireless_dev *wdev = dev->ieee80211_ptr;
 411         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 412         struct cfg80211_event *ev;
 413         unsigned long flags;
 414
 415         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 416         if (!ev)
 417                 return;
 418
 419         ev->type = EVENT_CONNECT_RESULT;
 420         memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 421         ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 422         ev->cr.req_ie_len = req_ie_len;
 423         memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 424         ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 425         ev->cr.resp_ie_len = resp_ie_len;
 426         memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 427         ev->cr.status = status;
 428
 429         spin_lock_irqsave(&wdev->event_lock, flags);
 430         list_add_tail(&ev->list, &wdev->event_list);
 431         spin_unlock_irqrestore(&wdev->event_lock, flags);
 432         schedule_work(&rdev->event_work);
 433 }
 434 EXPORT_SYMBOL(cfg80211_connect_result);
 435
 436 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 437                        const u8 *req_ie, size_t req_ie_len,
 438                        const u8 *resp_ie, size_t resp_ie_len)
 439 {
 440         struct cfg80211_bss *bss;
 441 #ifdef CONFIG_WIRELESS_EXT
 442         union iwreq_data wrqu;
 443 #endif
 444
 445         ASSERT_WDEV_LOCK(wdev);
 446
 447         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 448                 return;
 449
 450         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 451                 return;
 452
 453         /* internal error -- how did we get to CONNECTED w/o BSS? */
 454         if (WARN_ON(!wdev->current_bss)) {
 455                 return;
 456         }
 457
 458         cfg80211_unhold_bss(wdev->current_bss);
 459         cfg80211_put_bss(&wdev->current_bss->pub);
 460         wdev->current_bss = NULL;
 461
 462         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 463                                wdev->ssid, wdev->ssid_len,
 464                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 465
 466         if (WARN_ON(!bss))
 467                 return;
 468
 469         cfg80211_hold_bss(bss_from_pub(bss));
 470         wdev->current_bss = bss_from_pub(bss);
 471
 472         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
 473                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 474                             GFP_KERNEL);
 475
 476 #ifdef CONFIG_WIRELESS_EXT
 477         if (req_ie) {
 478                 memset(&wrqu, 0, sizeof(wrqu));
 479                 wrqu.data.length = req_ie_len;
 480                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 481                                     &wrqu, req_ie);
 482         }
 483
 484         if (resp_ie) {
 485                 memset(&wrqu, 0, sizeof(wrqu));
 486                 wrqu.data.length = resp_ie_len;
 487                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 488                                     &wrqu, resp_ie);
 489         }
 490
 491         memset(&wrqu, 0, sizeof(wrqu));
 492         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 493         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 494         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 495 #endif
 496 }
 497
 498 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 499                      const u8 *req_ie, size_t req_ie_len,
 500                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 501 {
 502         struct wireless_dev *wdev = dev->ieee80211_ptr;
 503         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 504         struct cfg80211_event *ev;
 505         unsigned long flags;
 506
 507         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 508         if (!ev)
 509                 return;
 510
 511         ev->type = EVENT_ROAMED;
 512         memcpy(ev->rm.bssid, bssid, ETH_ALEN);
 513         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 514         ev->rm.req_ie_len = req_ie_len;
 515         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 516         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 517         ev->rm.resp_ie_len = resp_ie_len;
 518         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 519
 520         spin_lock_irqsave(&wdev->event_lock, flags);
 521         list_add_tail(&ev->list, &wdev->event_list);
 522         spin_unlock_irqrestore(&wdev->event_lock, flags);
 523         schedule_work(&rdev->event_work);
 524 }
 525 EXPORT_SYMBOL(cfg80211_roamed);
 526
 527 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 528                              size_t ie_len, u16 reason, bool from_ap)
 529 {
 530         struct wireless_dev *wdev = dev->ieee80211_ptr;
 531         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 532         int i;
 533 #ifdef CONFIG_WIRELESS_EXT
 534         union iwreq_data wrqu;
 535 #endif
 536
 537         ASSERT_WDEV_LOCK(wdev);
 538
 539         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 540                 return;
 541
 542         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 543                 return;
 544
 545         if (wdev->current_bss) {
 546                 cfg80211_unhold_bss(wdev->current_bss);
 547                 cfg80211_put_bss(&wdev->current_bss->pub);
 548         }
 549
 550         wdev->current_bss = NULL;
 551         wdev->sme_state = CFG80211_SME_IDLE;
 552
 553         if (wdev->conn) {
 554                 kfree(wdev->conn->ie);
 555                 wdev->conn->ie = NULL;
 556                 kfree(wdev->conn);
 557                 wdev->conn = NULL;
 558         }
 559
 560         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 561
 562         /*
 563          * Delete all the keys ... pairwise keys can't really
 564          * exist any more anyway, but default keys might.
 565          */
 566         if (rdev->ops->del_key)
 567                 for (i = 0; i < 6; i++)
 568                         rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
 569
 570 #ifdef CONFIG_WIRELESS_EXT
 571         memset(&wrqu, 0, sizeof(wrqu));
 572         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 573         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 574 #endif
 575 }
 576
 577 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 578                            u8 *ie, size_t ie_len, gfp_t gfp)
 579 {
 580         struct wireless_dev *wdev = dev->ieee80211_ptr;
 581         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 582         struct cfg80211_event *ev;
 583         unsigned long flags;
 584
 585         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 586         if (!ev)
 587                 return;
 588
 589         ev->type = EVENT_DISCONNECTED;
 590         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 591         ev->dc.ie_len = ie_len;
 592         memcpy((void *)ev->dc.ie, ie, ie_len);
 593         ev->dc.reason = reason;
 594
 595         spin_lock_irqsave(&wdev->event_lock, flags);
 596         list_add_tail(&ev->list, &wdev->event_list);
 597         spin_unlock_irqrestore(&wdev->event_lock, flags);
 598         schedule_work(&rdev->event_work);
 599 }
 600 EXPORT_SYMBOL(cfg80211_disconnected);
 601
 602 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 603                        struct net_device *dev,
 604                        struct cfg80211_connect_params *connect,
 605                        struct cfg80211_cached_keys *connkeys)
 606 {
 607         struct wireless_dev *wdev = dev->ieee80211_ptr;
 608         int err;
 609
 610         ASSERT_WDEV_LOCK(wdev);
 611
 612         if (wdev->sme_state != CFG80211_SME_IDLE)
 613                 return -EALREADY;
 614
 615         if (WARN_ON(wdev->connect_keys)) {
 616                 kfree(wdev->connect_keys);
 617                 wdev->connect_keys = NULL;
 618         }
 619
 620         if (connkeys && connkeys->def >= 0) {
 621                 int idx;
 622
 623                 idx = connkeys->def;
 624                 /* If given a WEP key we may need it for shared key auth */
 625                 if (connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP40 ||
 626                     connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP104) {
 627                         connect->key_idx = idx;
 628                         connect->key = connkeys->params[idx].key;
 629                         connect->key_len = connkeys->params[idx].key_len;
 630                 }
 631         }
 632
 633         if (!rdev->ops->connect) {
 634                 if (!rdev->ops->auth || !rdev->ops->assoc)
 635                         return -EOPNOTSUPP;
 636
 637                 if (WARN_ON(wdev->conn))
 638                         return -EINPROGRESS;
 639
 640                 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 641                 if (!wdev->conn)
 642                         return -ENOMEM;
 643
 644                 /*
 645                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 646                  */
 647                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 648                 if (connect->bssid) {
 649                         wdev->conn->params.bssid = wdev->conn->bssid;
 650                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 651                 }
 652
 653                 if (connect->ie) {
 654                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 655                                                 GFP_KERNEL);
 656                         wdev->conn->params.ie = wdev->conn->ie;
 657                         if (!wdev->conn->ie) {
 658                                 kfree(wdev->conn);
 659                                 wdev->conn = NULL;
 660                                 return -ENOMEM;
 661                         }
 662                 }
 663
 664                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 665                         wdev->conn->auto_auth = true;
 666                         /* start with open system ... should mostly work */
 667                         wdev->conn->params.auth_type =
 668                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 669                 } else {
 670                         wdev->conn->auto_auth = false;
 671                 }
 672
 673                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 674                 wdev->ssid_len = connect->ssid_len;
 675                 wdev->conn->params.ssid = wdev->ssid;
 676                 wdev->conn->params.ssid_len = connect->ssid_len;
 677
 678                 /* don't care about result -- but fill bssid & channel */
 679                 if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
 680                         cfg80211_get_conn_bss(wdev);
 681
 682                 wdev->sme_state = CFG80211_SME_CONNECTING;
 683                 wdev->connect_keys = connkeys;
 684
 685                 /* we're good if we have both BSSID and channel */
 686                 if (wdev->conn->params.bssid && wdev->conn->params.channel) {
 687                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 688                         err = cfg80211_conn_do_work(wdev);
 689                 } else {
 690                         /* otherwise we'll need to scan for the AP first */
 691                         err = cfg80211_conn_scan(wdev);
 692                         /*
 693                          * If we can't scan right now, then we need to scan again
 694                          * after the current scan finished, since the parameters
 695                          * changed (unless we find a good AP anyway).
 696                          */
 697                         if (err == -EBUSY) {
 698                                 err = 0;
 699                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 700                         }
 701                 }
 702                 if (err) {
 703                         kfree(wdev->conn);
 704                         wdev->conn = NULL;
 705                         wdev->sme_state = CFG80211_SME_IDLE;
 706                         wdev->connect_keys = NULL;
 707                 }
 708
 709                 return err;
 710         } else {
 711                 wdev->sme_state = CFG80211_SME_CONNECTING;
 712                 wdev->connect_keys = connkeys;
 713                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 714                 if (err) {
 715                         wdev->connect_keys = NULL;
 716                         wdev->sme_state = CFG80211_SME_IDLE;
 717                         return err;
 718                 }
 719
 720                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 721                 wdev->ssid_len = connect->ssid_len;
 722
 723                 return 0;
 724         }
 725 }
 726
 727 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 728                      struct net_device *dev,
 729                      struct cfg80211_connect_params *connect,
 730                      struct cfg80211_cached_keys *connkeys)
 731 {
 732         int err;
 733
 734         wdev_lock(dev->ieee80211_ptr);
 735         err = __cfg80211_connect(rdev, dev, connect, connkeys);
 736         wdev_unlock(dev->ieee80211_ptr);
 737
 738         return err;
 739 }
 740
 741 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 742                           struct net_device *dev, u16 reason, bool wextev)
 743 {
 744         struct wireless_dev *wdev = dev->ieee80211_ptr;
 745         int err;
 746
 747         ASSERT_WDEV_LOCK(wdev);
 748
 749         if (wdev->sme_state == CFG80211_SME_IDLE)
 750                 return -EINVAL;
 751
 752         kfree(wdev->connect_keys);
 753         wdev->connect_keys = NULL;
 754
 755         if (!rdev->ops->disconnect) {
 756                 if (!rdev->ops->deauth)
 757                         return -EOPNOTSUPP;
 758
 759                 /* was it connected by userspace SME? */
 760                 if (!wdev->conn) {
 761                         cfg80211_mlme_down(rdev, dev);
 762                         return 0;
 763                 }
 764
 765                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 766                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 767                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 768                         wdev->sme_state = CFG80211_SME_IDLE;
 769                         kfree(wdev->conn);
 770                         wdev->conn = NULL;
 771                         return 0;
 772                 }
 773
 774                 /* wdev->conn->params.bssid must be set if > SCANNING */
 775                 err = __cfg80211_mlme_deauth(rdev, dev,
 776                                              wdev->conn->params.bssid,
 777                                              NULL, 0, reason);
 778                 if (err)
 779                         return err;
 780         } else {
 781                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 782                 if (err)
 783                         return err;
 784         }
 785
 786         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 787                 __cfg80211_disconnected(dev, NULL, 0, 0, false);
 788         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 789                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 790                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 791                                           wextev);
 792
 793         return 0;
 794 }
 795
 796 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 797                         struct net_device *dev,
 798                         u16 reason, bool wextev)
 799 {
 800         int err;
 801
 802         wdev_lock(dev->ieee80211_ptr);
 803         err = __cfg80211_disconnect(rdev, dev, reason, wextev);
 804         wdev_unlock(dev->ieee80211_ptr);
 805
 806         return err;
 807 }
 808
 809 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
 810 {
 811         struct wireless_dev *wdev = dev->ieee80211_ptr;
 812         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 813         u8 bssid[ETH_ALEN];
 814
 815         ASSERT_WDEV_LOCK(wdev);
 816
 817         if (!wdev->conn)
 818                 return;
 819
 820         if (wdev->conn->state == CFG80211_CONN_IDLE)
 821                 return;
 822
 823         /*
 824          * Ok, so the association was made by this SME -- we don't
 825          * want it any more so deauthenticate too.
 826          */
 827
 828         if (!wdev->auth_bsses[idx])
 829                 return;
 830
 831         memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
 832         if (__cfg80211_mlme_deauth(rdev, dev, bssid,
 833                                    NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
 834                 /* whatever -- assume gone anyway */
 835                 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
 836                 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
 837                 wdev->auth_bsses[idx] = NULL;
 838         }
 839 }