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