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