SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 *rdev = wiphy_to_dev(wdev->wiphy);
  37         struct cfg80211_scan_request *request;
  38         int n_channels, err;
  39
  40         ASSERT_RTNL();
  41         ASSERT_RDEV_LOCK(rdev);
  42         ASSERT_WDEV_LOCK(wdev);
  43
  44         if (rdev->scan_req)
  45                 return -EBUSY;
  46
  47         if (wdev->conn->params.channel) {
  48                 n_channels = 1;
  49         } else {
  50                 enum ieee80211_band band;
  51                 n_channels = 0;
  52
  53                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  54                         if (!wdev->wiphy->bands[band])
  55                                 continue;
  56                         n_channels += wdev->wiphy->bands[band]->n_channels;
  57                 }
  58         }
  59         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  60                           sizeof(request->channels[0]) * n_channels,
  61                           GFP_KERNEL);
  62         if (!request)
  63                 return -ENOMEM;
  64
  65         request->channels = (void *)((char *)request + sizeof(*request));
  66         if (wdev->conn->params.channel)
  67                 request->channels[0] = wdev->conn->params.channel;
  68         else {
  69                 int i = 0, j;
  70                 enum ieee80211_band band;
  71
  72                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  73                         if (!wdev->wiphy->bands[band])
  74                                 continue;
  75                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
  76                              i++, j++)
  77                                 request->channels[i] =
  78                                         &wdev->wiphy->bands[band]->channels[j];
  79                 }
  80         }
  81         request->n_channels = n_channels;
  82         request->ssids = (void *)(request->channels + n_channels);
  83         request->n_ssids = 1;
  84
  85         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
  86                 wdev->conn->params.ssid_len);
  87         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
  88
  89         request->ifidx = wdev->netdev->ifindex;
  90         request->wiphy = &rdev->wiphy;
  91
  92         rdev->scan_req = request;
  93
  94         err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
  95         if (!err) {
  96                 wdev->conn->state = CFG80211_CONN_SCANNING;
  97                 nl80211_send_scan_start(rdev, wdev->netdev);
  98         } else {
  99                 rdev->scan_req = NULL;
 100                 kfree(request);
 101         }
 102         return err;
 103 }
 104
 105 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 106 {
 107         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 108         struct cfg80211_connect_params *params;
 109         int err;
 110
 111         ASSERT_WDEV_LOCK(wdev);
 112
 113         if (!wdev->conn)
 114                 return 0;
 115
 116         params = &wdev->conn->params;
 117
 118         switch (wdev->conn->state) {
 119         case CFG80211_CONN_SCAN_AGAIN:
 120                 return cfg80211_conn_scan(wdev);
 121         case CFG80211_CONN_AUTHENTICATE_NEXT:
 122                 BUG_ON(!rdev->ops->auth);
 123                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 124                 return __cfg80211_mlme_auth(rdev, wdev->netdev,
 125                                             params->channel, params->auth_type,
 126                                             params->bssid,
 127                                             params->ssid, params->ssid_len,
 128                                             NULL, 0);
 129         case CFG80211_CONN_ASSOCIATE_NEXT:
 130                 BUG_ON(!rdev->ops->assoc);
 131                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 132                 /*
 133                  * We could, later, implement roaming here and then actually
 134                  * set prev_bssid to non-NULL. But then we need to be aware
 135                  * that some APs don't like that -- so we'd need to retry
 136                  * the association.
 137                  */
 138                 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
 139                                             params->channel, params->bssid,
 140                                             NULL,
 141                                             params->ssid, params->ssid_len,
 142                                             params->ie, params->ie_len,
 143                                             false, &params->crypto);
 144                 if (err)
 145                         __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 146                                                NULL, 0,
 147                                                WLAN_REASON_DEAUTH_LEAVING);
 148                 return err;
 149         default:
 150                 return 0;
 151         }
 152 }
 153
 154 void cfg80211_conn_work(struct work_struct *work)
 155 {
 156         struct cfg80211_registered_device *rdev =
 157                 container_of(work, struct cfg80211_registered_device, conn_work);
 158         struct wireless_dev *wdev;
 159
 160         rtnl_lock();
 161         cfg80211_lock_rdev(rdev);
 162         mutex_lock(&rdev->devlist_mtx);
 163
 164         list_for_each_entry(wdev, &rdev->netdev_list, list) {
 165                 wdev_lock(wdev);
 166                 if (!netif_running(wdev->netdev)) {
 167                         wdev_unlock(wdev);
 168                         continue;
 169                 }
 170                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 171                         wdev_unlock(wdev);
 172                         continue;
 173                 }
 174                 if (cfg80211_conn_do_work(wdev))
 175                         __cfg80211_connect_result(
 176                                         wdev->netdev,
 177                                         wdev->conn->params.bssid,
 178                                         NULL, 0, NULL, 0,
 179                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 180                                         false);
 181                 wdev_unlock(wdev);
 182         }
 183
 184         mutex_unlock(&rdev->devlist_mtx);
 185         cfg80211_unlock_rdev(rdev);
 186         rtnl_unlock();
 187 }
 188
 189 static bool cfg80211_get_conn_bss(struct wireless_dev *wdev)
 190 {
 191         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 192         struct cfg80211_bss *bss;
 193         u16 capa = WLAN_CAPABILITY_ESS;
 194
 195         ASSERT_WDEV_LOCK(wdev);
 196
 197         if (wdev->conn->params.privacy)
 198                 capa |= WLAN_CAPABILITY_PRIVACY;
 199
 200         bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
 201                                wdev->conn->params.ssid,
 202                                wdev->conn->params.ssid_len,
 203                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 204                                capa);
 205         if (!bss)
 206                 return false;
 207
 208         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 209         wdev->conn->params.bssid = wdev->conn->bssid;
 210         wdev->conn->params.channel = bss->channel;
 211         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 212         schedule_work(&rdev->conn_work);
 213
 214         cfg80211_put_bss(bss);
 215         return true;
 216 }
 217
 218 static void __cfg80211_sme_scan_done(struct net_device *dev)
 219 {
 220         struct wireless_dev *wdev = dev->ieee80211_ptr;
 221         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 222
 223         ASSERT_WDEV_LOCK(wdev);
 224
 225         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 226                 return;
 227
 228         if (WARN_ON(!wdev->conn))
 229                 return;
 230
 231         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 232             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 233                 return;
 234
 235         if (!cfg80211_get_conn_bss(wdev)) {
 236                 /* not found */
 237                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 238                         schedule_work(&rdev->conn_work);
 239                 else
 240                         __cfg80211_connect_result(
 241                                         wdev->netdev,
 242                                         wdev->conn->params.bssid,
 243                                         NULL, 0, NULL, 0,
 244                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 245                                         false);
 246         }
 247 }
 248
 249 void cfg80211_sme_scan_done(struct net_device *dev)
 250 {
 251         struct wireless_dev *wdev = dev->ieee80211_ptr;
 252
 253         wdev_lock(wdev);
 254         __cfg80211_sme_scan_done(dev);
 255         wdev_unlock(wdev);
 256 }
 257
 258 void cfg80211_sme_rx_auth(struct net_device *dev,
 259                           const u8 *buf, size_t len)
 260 {
 261         struct wireless_dev *wdev = dev->ieee80211_ptr;
 262         struct wiphy *wiphy = wdev->wiphy;
 263         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 264         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 265         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 266
 267         ASSERT_WDEV_LOCK(wdev);
 268
 269         /* should only RX auth frames when connecting */
 270         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 271                 return;
 272
 273         if (WARN_ON(!wdev->conn))
 274                 return;
 275
 276         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 277             wdev->conn->auto_auth &&
 278             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 279                 /* select automatically between only open, shared, leap */
 280                 switch (wdev->conn->params.auth_type) {
 281                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 282                         wdev->conn->params.auth_type =
 283                                 NL80211_AUTHTYPE_SHARED_KEY;
 284                         break;
 285                 case NL80211_AUTHTYPE_SHARED_KEY:
 286                         wdev->conn->params.auth_type =
 287                                 NL80211_AUTHTYPE_NETWORK_EAP;
 288                         break;
 289                 default:
 290                         /* huh? */
 291                         wdev->conn->params.auth_type =
 292                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 293                         break;
 294                 }
 295                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 296                 schedule_work(&rdev->conn_work);
 297         } else if (status_code != WLAN_STATUS_SUCCESS) {
 298                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 299                                           status_code, false);
 300         } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 301                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 302                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 303                 schedule_work(&rdev->conn_work);
 304         }
 305 }
 306
 307 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 308                                const u8 *req_ie, size_t req_ie_len,
 309                                const u8 *resp_ie, size_t resp_ie_len,
 310                                u16 status, bool wextev)
 311 {
 312         struct wireless_dev *wdev = dev->ieee80211_ptr;
 313         struct cfg80211_bss *bss;
 314 #ifdef CONFIG_WIRELESS_EXT
 315         union iwreq_data wrqu;
 316 #endif
 317
 318         ASSERT_WDEV_LOCK(wdev);
 319
 320         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 321                 return;
 322
 323         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 324                 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
 325                                     bssid, req_ie, req_ie_len,
 326                                     resp_ie, resp_ie_len, GFP_KERNEL);
 327         else
 328                 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 329                                             bssid, req_ie, req_ie_len,
 330                                             resp_ie, resp_ie_len,
 331                                             status, GFP_KERNEL);
 332
 333 #ifdef CONFIG_WIRELESS_EXT
 334         if (wextev) {
 335                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 336                         memset(&wrqu, 0, sizeof(wrqu));
 337                         wrqu.data.length = req_ie_len;
 338                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, req_ie);
 339                 }
 340
 341                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 342                         memset(&wrqu, 0, sizeof(wrqu));
 343                         wrqu.data.length = resp_ie_len;
 344                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 345                 }
 346
 347                 memset(&wrqu, 0, sizeof(wrqu));
 348                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 349                 if (bssid && status == WLAN_STATUS_SUCCESS)
 350                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 351                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 352         }
 353 #endif
 354
 355         if (status == WLAN_STATUS_SUCCESS &&
 356             wdev->sme_state == CFG80211_SME_IDLE) {
 357                 wdev->sme_state = CFG80211_SME_CONNECTED;
 358                 return;
 359         }
 360
 361         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 362                 return;
 363
 364         if (wdev->current_bss) {
 365                 cfg80211_unhold_bss(wdev->current_bss);
 366                 cfg80211_put_bss(&wdev->current_bss->pub);
 367                 wdev->current_bss = NULL;
 368         }
 369
 370         if (wdev->conn)
 371                 wdev->conn->state = CFG80211_CONN_IDLE;
 372
 373         if (status == WLAN_STATUS_SUCCESS) {
 374                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 375                                        wdev->ssid, wdev->ssid_len,
 376                                        WLAN_CAPABILITY_ESS,
 377                                        WLAN_CAPABILITY_ESS);
 378
 379                 if (WARN_ON(!bss))
 380                         return;
 381
 382                 cfg80211_hold_bss(bss_from_pub(bss));
 383                 wdev->current_bss = bss_from_pub(bss);
 384
 385                 wdev->sme_state = CFG80211_SME_CONNECTED;
 386         } else {
 387                 wdev->sme_state = CFG80211_SME_IDLE;
 388                 kfree(wdev->conn);
 389                 wdev->conn = NULL;
 390         }
 391 }
 392
 393 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 394                              const u8 *req_ie, size_t req_ie_len,
 395                              const u8 *resp_ie, size_t resp_ie_len,
 396                              u16 status, gfp_t gfp)
 397 {
 398         struct wireless_dev *wdev = dev->ieee80211_ptr;
 399         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 400         struct cfg80211_event *ev;
 401         unsigned long flags;
 402
 403         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 404         if (!ev)
 405                 return;
 406
 407         ev->type = EVENT_CONNECT_RESULT;
 408         memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 409         ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 410         ev->cr.req_ie_len = req_ie_len;
 411         memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 412         ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 413         ev->cr.resp_ie_len = resp_ie_len;
 414         memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 415         ev->cr.status = status;
 416
 417         spin_lock_irqsave(&wdev->event_lock, flags);
 418         list_add_tail(&ev->list, &wdev->event_list);
 419         spin_unlock_irqrestore(&wdev->event_lock, flags);
 420         schedule_work(&rdev->event_work);
 421 }
 422 EXPORT_SYMBOL(cfg80211_connect_result);
 423
 424 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 425                        const u8 *req_ie, size_t req_ie_len,
 426                        const u8 *resp_ie, size_t resp_ie_len)
 427 {
 428         struct cfg80211_bss *bss;
 429 #ifdef CONFIG_WIRELESS_EXT
 430         union iwreq_data wrqu;
 431 #endif
 432
 433         ASSERT_WDEV_LOCK(wdev);
 434
 435         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 436                 return;
 437
 438         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 439                 return;
 440
 441         /* internal error -- how did we get to CONNECTED w/o BSS? */
 442         if (WARN_ON(!wdev->current_bss)) {
 443                 return;
 444         }
 445
 446         cfg80211_unhold_bss(wdev->current_bss);
 447         cfg80211_put_bss(&wdev->current_bss->pub);
 448         wdev->current_bss = NULL;
 449
 450         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 451                                wdev->ssid, wdev->ssid_len,
 452                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 453
 454         if (WARN_ON(!bss))
 455                 return;
 456
 457         cfg80211_hold_bss(bss_from_pub(bss));
 458         wdev->current_bss = bss_from_pub(bss);
 459
 460         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
 461                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 462                             GFP_KERNEL);
 463
 464 #ifdef CONFIG_WIRELESS_EXT
 465         if (req_ie) {
 466                 memset(&wrqu, 0, sizeof(wrqu));
 467                 wrqu.data.length = req_ie_len;
 468                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 469                                     &wrqu, req_ie);
 470         }
 471
 472         if (resp_ie) {
 473                 memset(&wrqu, 0, sizeof(wrqu));
 474                 wrqu.data.length = resp_ie_len;
 475                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 476                                     &wrqu, resp_ie);
 477         }
 478
 479         memset(&wrqu, 0, sizeof(wrqu));
 480         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 481         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 482         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 483 #endif
 484 }
 485
 486 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 487                      const u8 *req_ie, size_t req_ie_len,
 488                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 489 {
 490         struct wireless_dev *wdev = dev->ieee80211_ptr;
 491         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 492         struct cfg80211_event *ev;
 493         unsigned long flags;
 494
 495         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 496         if (!ev)
 497                 return;
 498
 499         ev->type = EVENT_ROAMED;
 500         memcpy(ev->rm.bssid, bssid, ETH_ALEN);
 501         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 502         ev->rm.req_ie_len = req_ie_len;
 503         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 504         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 505         ev->rm.resp_ie_len = resp_ie_len;
 506         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 507
 508         spin_lock_irqsave(&wdev->event_lock, flags);
 509         list_add_tail(&ev->list, &wdev->event_list);
 510         spin_unlock_irqrestore(&wdev->event_lock, flags);
 511         schedule_work(&rdev->event_work);
 512 }
 513 EXPORT_SYMBOL(cfg80211_roamed);
 514
 515 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 516                              size_t ie_len, u16 reason, bool from_ap)
 517 {
 518         struct wireless_dev *wdev = dev->ieee80211_ptr;
 519 #ifdef CONFIG_WIRELESS_EXT
 520         union iwreq_data wrqu;
 521 #endif
 522
 523         ASSERT_WDEV_LOCK(wdev);
 524
 525         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 526                 return;
 527
 528         if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
 529                 return;
 530
 531         if (wdev->current_bss) {
 532                 cfg80211_unhold_bss(wdev->current_bss);
 533                 cfg80211_put_bss(&wdev->current_bss->pub);
 534         }
 535
 536         wdev->current_bss = NULL;
 537         wdev->sme_state = CFG80211_SME_IDLE;
 538
 539         if (wdev->conn) {
 540                 kfree(wdev->conn->ie);
 541                 wdev->conn->ie = NULL;
 542                 kfree(wdev->conn);
 543                 wdev->conn = NULL;
 544         }
 545
 546         nl80211_send_disconnected(wiphy_to_dev(wdev->wiphy), dev,
 547                                   reason, ie, ie_len, from_ap);
 548
 549 #ifdef CONFIG_WIRELESS_EXT
 550         memset(&wrqu, 0, sizeof(wrqu));
 551         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 552         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 553 #endif
 554 }
 555
 556 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 557                            u8 *ie, size_t ie_len, gfp_t gfp)
 558 {
 559         struct wireless_dev *wdev = dev->ieee80211_ptr;
 560         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 561         struct cfg80211_event *ev;
 562         unsigned long flags;
 563
 564         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 565         if (!ev)
 566                 return;
 567
 568         ev->type = EVENT_DISCONNECTED;
 569         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 570         ev->dc.ie_len = ie_len;
 571         memcpy((void *)ev->dc.ie, ie, ie_len);
 572         ev->dc.reason = reason;
 573
 574         spin_lock_irqsave(&wdev->event_lock, flags);
 575         list_add_tail(&ev->list, &wdev->event_list);
 576         spin_unlock_irqrestore(&wdev->event_lock, flags);
 577         schedule_work(&rdev->event_work);
 578 }
 579 EXPORT_SYMBOL(cfg80211_disconnected);
 580
 581 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 582                        struct net_device *dev,
 583                        struct cfg80211_connect_params *connect)
 584 {
 585         struct wireless_dev *wdev = dev->ieee80211_ptr;
 586         int err;
 587
 588         ASSERT_WDEV_LOCK(wdev);
 589
 590         if (wdev->sme_state != CFG80211_SME_IDLE)
 591                 return -EALREADY;
 592
 593         if (!rdev->ops->connect) {
 594                 if (!rdev->ops->auth || !rdev->ops->assoc)
 595                         return -EOPNOTSUPP;
 596
 597                 if (WARN_ON(wdev->conn))
 598                         return -EINPROGRESS;
 599
 600                 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 601                 if (!wdev->conn)
 602                         return -ENOMEM;
 603
 604                 /*
 605                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 606                  */
 607                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 608                 if (connect->bssid) {
 609                         wdev->conn->params.bssid = wdev->conn->bssid;
 610                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 611                 }
 612
 613                 if (connect->ie) {
 614                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 615                                                 GFP_KERNEL);
 616                         wdev->conn->params.ie = wdev->conn->ie;
 617                         if (!wdev->conn->ie) {
 618                                 kfree(wdev->conn);
 619                                 wdev->conn = NULL;
 620                                 return -ENOMEM;
 621                         }
 622                 }
 623
 624                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 625                         wdev->conn->auto_auth = true;
 626                         /* start with open system ... should mostly work */
 627                         wdev->conn->params.auth_type =
 628                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 629                 } else {
 630                         wdev->conn->auto_auth = false;
 631                 }
 632
 633                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 634                 wdev->ssid_len = connect->ssid_len;
 635                 wdev->conn->params.ssid = wdev->ssid;
 636                 wdev->conn->params.ssid_len = connect->ssid_len;
 637
 638                 /* don't care about result -- but fill bssid & channel */
 639                 if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
 640                         cfg80211_get_conn_bss(wdev);
 641
 642                 wdev->sme_state = CFG80211_SME_CONNECTING;
 643
 644                 /* we're good if we have both BSSID and channel */
 645                 if (wdev->conn->params.bssid && wdev->conn->params.channel) {
 646                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 647                         err = cfg80211_conn_do_work(wdev);
 648                 } else {
 649                         /* otherwise we'll need to scan for the AP first */
 650                         err = cfg80211_conn_scan(wdev);
 651                         /*
 652                          * If we can't scan right now, then we need to scan again
 653                          * after the current scan finished, since the parameters
 654                          * changed (unless we find a good AP anyway).
 655                          */
 656                         if (err == -EBUSY) {
 657                                 err = 0;
 658                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 659                         }
 660                 }
 661                 if (err) {
 662                         kfree(wdev->conn);
 663                         wdev->conn = NULL;
 664                         wdev->sme_state = CFG80211_SME_IDLE;
 665                 }
 666
 667                 return err;
 668         } else {
 669                 wdev->sme_state = CFG80211_SME_CONNECTING;
 670                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 671                 if (err) {
 672                         wdev->sme_state = CFG80211_SME_IDLE;
 673                         return err;
 674                 }
 675
 676                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 677                 wdev->ssid_len = connect->ssid_len;
 678
 679                 return 0;
 680         }
 681 }
 682
 683 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 684                      struct net_device *dev,
 685                      struct cfg80211_connect_params *connect)
 686 {
 687         int err;
 688
 689         wdev_lock(dev->ieee80211_ptr);
 690         err = __cfg80211_connect(rdev, dev, connect);
 691         wdev_unlock(dev->ieee80211_ptr);
 692
 693         return err;
 694 }
 695
 696 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 697                           struct net_device *dev, u16 reason, bool wextev)
 698 {
 699         struct wireless_dev *wdev = dev->ieee80211_ptr;
 700         int err;
 701
 702         ASSERT_WDEV_LOCK(wdev);
 703
 704         if (wdev->sme_state == CFG80211_SME_IDLE)
 705                 return -EINVAL;
 706
 707         if (!rdev->ops->disconnect) {
 708                 if (!rdev->ops->deauth)
 709                         return -EOPNOTSUPP;
 710
 711                 /* was it connected by userspace SME? */
 712                 if (!wdev->conn) {
 713                         cfg80211_mlme_down(rdev, dev);
 714                         return 0;
 715                 }
 716
 717                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 718                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 719                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 720                         wdev->sme_state = CFG80211_SME_IDLE;
 721                         kfree(wdev->conn);
 722                         wdev->conn = NULL;
 723                         return 0;
 724                 }
 725
 726                 /* wdev->conn->params.bssid must be set if > SCANNING */
 727                 err = __cfg80211_mlme_deauth(rdev, dev,
 728                                              wdev->conn->params.bssid,
 729                                              NULL, 0, reason);
 730                 if (err)
 731                         return err;
 732         } else {
 733                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 734                 if (err)
 735                         return err;
 736         }
 737
 738         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 739                 __cfg80211_disconnected(dev, NULL, 0, 0, false);
 740         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 741                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 742                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 743                                           wextev);
 744
 745         return 0;
 746 }
 747
 748 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 749                         struct net_device *dev,
 750                         u16 reason, bool wextev)
 751 {
 752         int err;
 753
 754         wdev_lock(dev->ieee80211_ptr);
 755         err = __cfg80211_disconnect(rdev, dev, reason, wextev);
 756         wdev_unlock(dev->ieee80211_ptr);
 757
 758         return err;
 759 }
 760
 761 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
 762 {
 763         struct wireless_dev *wdev = dev->ieee80211_ptr;
 764         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 765         u8 bssid[ETH_ALEN];
 766
 767         ASSERT_WDEV_LOCK(wdev);
 768
 769         if (!wdev->conn)
 770                 return;
 771
 772         if (wdev->conn->state == CFG80211_CONN_IDLE)
 773                 return;
 774
 775         /*
 776          * Ok, so the association was made by this SME -- we don't
 777          * want it any more so deauthenticate too.
 778          */
 779
 780         if (!wdev->auth_bsses[idx])
 781                 return;
 782
 783         memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
 784         if (cfg80211_mlme_deauth(rdev, dev, bssid,
 785                                  NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
 786                 /* whatever -- assume gone anyway */
 787                 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
 788                 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
 789                 wdev->auth_bsses[idx] = NULL;
 790         }
 791 }