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 <linux/wireless.h>
  12 #include <net/iw_handler.h>
  13 #include <net/cfg80211.h>
  14 #include <net/rtnetlink.h>
  15 #include "nl80211.h"
  16 #include "reg.h"
  17
  18 struct cfg80211_conn {
  19         struct cfg80211_connect_params params;
  20         /* these are sub-states of the _CONNECTING sme_state */
  21         enum {
  22                 CFG80211_CONN_IDLE,
  23                 CFG80211_CONN_SCANNING,
  24                 CFG80211_CONN_SCAN_AGAIN,
  25                 CFG80211_CONN_AUTHENTICATE_NEXT,
  26                 CFG80211_CONN_AUTHENTICATING,
  27                 CFG80211_CONN_ASSOCIATE_NEXT,
  28                 CFG80211_CONN_ASSOCIATING,
  29                 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
  30         } state;
  31         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  32         u8 *ie;
  33         size_t ie_len;
  34         bool auto_auth, prev_bssid_valid;
  35 };
  36
  37
  38 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  39 {
  40         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  41         struct cfg80211_scan_request *request;
  42         int n_channels, err;
  43
  44         ASSERT_RTNL();
  45         ASSERT_RDEV_LOCK(rdev);
  46         ASSERT_WDEV_LOCK(wdev);
  47
  48         if (rdev->scan_req)
  49                 return -EBUSY;
  50
  51         if (wdev->conn->params.channel) {
  52                 n_channels = 1;
  53         } else {
  54                 enum ieee80211_band band;
  55                 n_channels = 0;
  56
  57                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  58                         if (!wdev->wiphy->bands[band])
  59                                 continue;
  60                         n_channels += wdev->wiphy->bands[band]->n_channels;
  61                 }
  62         }
  63         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  64                           sizeof(request->channels[0]) * n_channels,
  65                           GFP_KERNEL);
  66         if (!request)
  67                 return -ENOMEM;
  68
  69         if (wdev->conn->params.channel)
  70                 request->channels[0] = wdev->conn->params.channel;
  71         else {
  72                 int i = 0, j;
  73                 enum ieee80211_band band;
  74
  75                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  76                         if (!wdev->wiphy->bands[band])
  77                                 continue;
  78                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
  79                              i++, j++)
  80                                 request->channels[i] =
  81                                         &wdev->wiphy->bands[band]->channels[j];
  82                 }
  83         }
  84         request->n_channels = n_channels;
  85         request->ssids = (void *)&request->channels[n_channels];
  86         request->n_ssids = 1;
  87
  88         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
  89                 wdev->conn->params.ssid_len);
  90         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
  91
  92         request->dev = wdev->netdev;
  93         request->wiphy = &rdev->wiphy;
  94
  95         rdev->scan_req = request;
  96
  97         err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
  98         if (!err) {
  99                 wdev->conn->state = CFG80211_CONN_SCANNING;
 100                 nl80211_send_scan_start(rdev, wdev->netdev);
 101                 dev_hold(wdev->netdev);
 102         } else {
 103                 rdev->scan_req = NULL;
 104                 kfree(request);
 105         }
 106         return err;
 107 }
 108
 109 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 110 {
 111         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 112         struct cfg80211_connect_params *params;
 113         const u8 *prev_bssid = NULL;
 114         int err;
 115
 116         ASSERT_WDEV_LOCK(wdev);
 117
 118         if (!wdev->conn)
 119                 return 0;
 120
 121         params = &wdev->conn->params;
 122
 123         switch (wdev->conn->state) {
 124         case CFG80211_CONN_SCAN_AGAIN:
 125                 return cfg80211_conn_scan(wdev);
 126         case CFG80211_CONN_AUTHENTICATE_NEXT:
 127                 BUG_ON(!rdev->ops->auth);
 128                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 129                 return __cfg80211_mlme_auth(rdev, wdev->netdev,
 130                                             params->channel, params->auth_type,
 131                                             params->bssid,
 132                                             params->ssid, params->ssid_len,
 133                                             NULL, 0,
 134                                             params->key, params->key_len,
 135                                             params->key_idx);
 136         case CFG80211_CONN_ASSOCIATE_NEXT:
 137                 BUG_ON(!rdev->ops->assoc);
 138                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 139                 if (wdev->conn->prev_bssid_valid)
 140                         prev_bssid = wdev->conn->prev_bssid;
 141                 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
 142                                             params->channel, params->bssid,
 143                                             prev_bssid,
 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         case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
 153                 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 154                                        NULL, 0,
 155                                        WLAN_REASON_DEAUTH_LEAVING);
 156                 /* return an error so that we call __cfg80211_connect_result() */
 157                 return -EINVAL;
 158         default:
 159                 return 0;
 160         }
 161 }
 162
 163 void cfg80211_conn_work(struct work_struct *work)
 164 {
 165         struct cfg80211_registered_device *rdev =
 166                 container_of(work, struct cfg80211_registered_device, conn_work);
 167         struct wireless_dev *wdev;
 168         u8 bssid[ETH_ALEN];
 169
 170         rtnl_lock();
 171         cfg80211_lock_rdev(rdev);
 172         mutex_lock(&rdev->devlist_mtx);
 173
 174         list_for_each_entry(wdev, &rdev->netdev_list, list) {
 175                 wdev_lock(wdev);
 176                 if (!netif_running(wdev->netdev)) {
 177                         wdev_unlock(wdev);
 178                         continue;
 179                 }
 180                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 181                         wdev_unlock(wdev);
 182                         continue;
 183                 }
 184                 memcpy(bssid, wdev->conn->params.bssid, ETH_ALEN);
 185                 if (cfg80211_conn_do_work(wdev))
 186                         __cfg80211_connect_result(
 187                                         wdev->netdev, bssid,
 188                                         NULL, 0, NULL, 0,
 189                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 190                                         false, NULL);
 191                 wdev_unlock(wdev);
 192         }
 193
 194         mutex_unlock(&rdev->devlist_mtx);
 195         cfg80211_unlock_rdev(rdev);
 196         rtnl_unlock();
 197 }
 198
 199 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 200 {
 201         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 202         struct cfg80211_bss *bss;
 203         u16 capa = WLAN_CAPABILITY_ESS;
 204
 205         ASSERT_WDEV_LOCK(wdev);
 206
 207         if (wdev->conn->params.privacy)
 208                 capa |= WLAN_CAPABILITY_PRIVACY;
 209
 210         bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
 211                                wdev->conn->params.ssid,
 212                                wdev->conn->params.ssid_len,
 213                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 214                                capa);
 215         if (!bss)
 216                 return NULL;
 217
 218         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 219         wdev->conn->params.bssid = wdev->conn->bssid;
 220         wdev->conn->params.channel = bss->channel;
 221         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 222         schedule_work(&rdev->conn_work);
 223
 224         return bss;
 225 }
 226
 227 static void __cfg80211_sme_scan_done(struct net_device *dev)
 228 {
 229         struct wireless_dev *wdev = dev->ieee80211_ptr;
 230         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 231         struct cfg80211_bss *bss;
 232
 233         ASSERT_WDEV_LOCK(wdev);
 234
 235         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 236                 return;
 237
 238         if (!wdev->conn)
 239                 return;
 240
 241         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 242             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 243                 return;
 244
 245         bss = cfg80211_get_conn_bss(wdev);
 246         if (bss) {
 247                 cfg80211_put_bss(bss);
 248         } else {
 249                 /* not found */
 250                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 251                         schedule_work(&rdev->conn_work);
 252                 else
 253                         __cfg80211_connect_result(
 254                                         wdev->netdev,
 255                                         wdev->conn->params.bssid,
 256                                         NULL, 0, NULL, 0,
 257                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 258                                         false, NULL);
 259         }
 260 }
 261
 262 void cfg80211_sme_scan_done(struct net_device *dev)
 263 {
 264         struct wireless_dev *wdev = dev->ieee80211_ptr;
 265
 266         mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
 267         wdev_lock(wdev);
 268         __cfg80211_sme_scan_done(dev);
 269         wdev_unlock(wdev);
 270         mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
 271 }
 272
 273 void cfg80211_sme_rx_auth(struct net_device *dev,
 274                           const u8 *buf, size_t len)
 275 {
 276         struct wireless_dev *wdev = dev->ieee80211_ptr;
 277         struct wiphy *wiphy = wdev->wiphy;
 278         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 279         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 280         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 281
 282         ASSERT_WDEV_LOCK(wdev);
 283
 284         /* should only RX auth frames when connecting */
 285         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 286                 return;
 287
 288         if (WARN_ON(!wdev->conn))
 289                 return;
 290
 291         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 292             wdev->conn->auto_auth &&
 293             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 294                 /* select automatically between only open, shared, leap */
 295                 switch (wdev->conn->params.auth_type) {
 296                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 297                         if (wdev->connect_keys)
 298                                 wdev->conn->params.auth_type =
 299                                         NL80211_AUTHTYPE_SHARED_KEY;
 300                         else
 301                                 wdev->conn->params.auth_type =
 302                                         NL80211_AUTHTYPE_NETWORK_EAP;
 303                         break;
 304                 case NL80211_AUTHTYPE_SHARED_KEY:
 305                         wdev->conn->params.auth_type =
 306                                 NL80211_AUTHTYPE_NETWORK_EAP;
 307                         break;
 308                 default:
 309                         /* huh? */
 310                         wdev->conn->params.auth_type =
 311                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 312                         break;
 313                 }
 314                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 315                 schedule_work(&rdev->conn_work);
 316         } else if (status_code != WLAN_STATUS_SUCCESS) {
 317                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 318                                           status_code, false, NULL);
 319         } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 320                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 321                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 322                 schedule_work(&rdev->conn_work);
 323         }
 324 }
 325
 326 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
 327 {
 328         struct wiphy *wiphy = wdev->wiphy;
 329         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 330
 331         if (WARN_ON(!wdev->conn))
 332                 return false;
 333
 334         if (!wdev->conn->prev_bssid_valid)
 335                 return false;
 336
 337         /*
 338          * Some stupid APs don't accept reassoc, so we
 339          * need to fall back to trying regular assoc.
 340          */
 341         wdev->conn->prev_bssid_valid = false;
 342         wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 343         schedule_work(&rdev->conn_work);
 344
 345         return true;
 346 }
 347
 348 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
 349 {
 350         struct wiphy *wiphy = wdev->wiphy;
 351         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 352
 353         wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
 354         schedule_work(&rdev->conn_work);
 355 }
 356
 357 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 358                                const u8 *req_ie, size_t req_ie_len,
 359                                const u8 *resp_ie, size_t resp_ie_len,
 360                                u16 status, bool wextev,
 361                                struct cfg80211_bss *bss)
 362 {
 363         struct wireless_dev *wdev = dev->ieee80211_ptr;
 364         u8 *country_ie;
 365 #ifdef CONFIG_WIRELESS_EXT
 366         union iwreq_data wrqu;
 367 #endif
 368
 369         ASSERT_WDEV_LOCK(wdev);
 370
 371         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 372                 return;
 373
 374         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 375                 return;
 376
 377         nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 378                                     bssid, req_ie, req_ie_len,
 379                                     resp_ie, resp_ie_len,
 380                                     status, GFP_KERNEL);
 381
 382 #ifdef CONFIG_WIRELESS_EXT
 383         if (wextev) {
 384                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 385                         memset(&wrqu, 0, sizeof(wrqu));
 386                         wrqu.data.length = req_ie_len;
 387                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 388                 }
 389
 390                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 391                         memset(&wrqu, 0, sizeof(wrqu));
 392                         wrqu.data.length = resp_ie_len;
 393                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 394                 }
 395
 396                 memset(&wrqu, 0, sizeof(wrqu));
 397                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 398                 if (bssid && status == WLAN_STATUS_SUCCESS) {
 399                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 400                         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 401                         wdev->wext.prev_bssid_valid = true;
 402                 }
 403                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 404         }
 405 #endif
 406
 407         if (wdev->current_bss) {
 408                 cfg80211_unhold_bss(wdev->current_bss);
 409                 cfg80211_put_bss(&wdev->current_bss->pub);
 410                 wdev->current_bss = NULL;
 411         }
 412
 413         if (wdev->conn)
 414                 wdev->conn->state = CFG80211_CONN_IDLE;
 415
 416         if (status != WLAN_STATUS_SUCCESS) {
 417                 wdev->sme_state = CFG80211_SME_IDLE;
 418                 if (wdev->conn)
 419                         kfree(wdev->conn->ie);
 420                 kfree(wdev->conn);
 421                 wdev->conn = NULL;
 422                 kfree(wdev->connect_keys);
 423                 wdev->connect_keys = NULL;
 424                 wdev->ssid_len = 0;
 425                 return;
 426         }
 427
 428         if (!bss)
 429                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 430                                        wdev->ssid, wdev->ssid_len,
 431                                        WLAN_CAPABILITY_ESS,
 432                                        WLAN_CAPABILITY_ESS);
 433
 434         if (WARN_ON(!bss))
 435                 return;
 436
 437         cfg80211_hold_bss(bss_from_pub(bss));
 438         wdev->current_bss = bss_from_pub(bss);
 439
 440         wdev->sme_state = CFG80211_SME_CONNECTED;
 441         cfg80211_upload_connect_keys(wdev);
 442
 443         country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
 444
 445         if (!country_ie)
 446                 return;
 447
 448         /*
 449          * ieee80211_bss_get_ie() ensures we can access:
 450          * - country_ie + 2, the start of the country ie data, and
 451          * - and country_ie[1] which is the IE length
 452          */
 453         regulatory_hint_11d(wdev->wiphy,
 454                             country_ie + 2,
 455                             country_ie[1]);
 456 }
 457
 458 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 459                              const u8 *req_ie, size_t req_ie_len,
 460                              const u8 *resp_ie, size_t resp_ie_len,
 461                              u16 status, gfp_t gfp)
 462 {
 463         struct wireless_dev *wdev = dev->ieee80211_ptr;
 464         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 465         struct cfg80211_event *ev;
 466         unsigned long flags;
 467
 468         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
 469
 470         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 471         if (!ev)
 472                 return;
 473
 474         ev->type = EVENT_CONNECT_RESULT;
 475         if (bssid)
 476                 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 477         ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 478         ev->cr.req_ie_len = req_ie_len;
 479         memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 480         ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 481         ev->cr.resp_ie_len = resp_ie_len;
 482         memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 483         ev->cr.status = status;
 484
 485         spin_lock_irqsave(&wdev->event_lock, flags);
 486         list_add_tail(&ev->list, &wdev->event_list);
 487         spin_unlock_irqrestore(&wdev->event_lock, flags);
 488         schedule_work(&rdev->event_work);
 489 }
 490 EXPORT_SYMBOL(cfg80211_connect_result);
 491
 492 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
 493                        const u8 *req_ie, size_t req_ie_len,
 494                        const u8 *resp_ie, size_t resp_ie_len)
 495 {
 496         struct cfg80211_bss *bss;
 497 #ifdef CONFIG_WIRELESS_EXT
 498         union iwreq_data wrqu;
 499 #endif
 500
 501         ASSERT_WDEV_LOCK(wdev);
 502
 503         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 504                 return;
 505
 506         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 507                 return;
 508
 509         /* internal error -- how did we get to CONNECTED w/o BSS? */
 510         if (WARN_ON(!wdev->current_bss)) {
 511                 return;
 512         }
 513
 514         cfg80211_unhold_bss(wdev->current_bss);
 515         cfg80211_put_bss(&wdev->current_bss->pub);
 516         wdev->current_bss = NULL;
 517
 518         bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 519                                wdev->ssid, wdev->ssid_len,
 520                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 521
 522         if (WARN_ON(!bss))
 523                 return;
 524
 525         cfg80211_hold_bss(bss_from_pub(bss));
 526         wdev->current_bss = bss_from_pub(bss);
 527
 528         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
 529                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 530                             GFP_KERNEL);
 531
 532 #ifdef CONFIG_WIRELESS_EXT
 533         if (req_ie) {
 534                 memset(&wrqu, 0, sizeof(wrqu));
 535                 wrqu.data.length = req_ie_len;
 536                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 537                                     &wrqu, req_ie);
 538         }
 539
 540         if (resp_ie) {
 541                 memset(&wrqu, 0, sizeof(wrqu));
 542                 wrqu.data.length = resp_ie_len;
 543                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 544                                     &wrqu, resp_ie);
 545         }
 546
 547         memset(&wrqu, 0, sizeof(wrqu));
 548         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 549         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 550         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 551         wdev->wext.prev_bssid_valid = true;
 552         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 553 #endif
 554 }
 555
 556 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
 557                      const u8 *req_ie, size_t req_ie_len,
 558                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 559 {
 560         struct wireless_dev *wdev = dev->ieee80211_ptr;
 561         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 562         struct cfg80211_event *ev;
 563         unsigned long flags;
 564
 565         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
 566
 567         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 568         if (!ev)
 569                 return;
 570
 571         ev->type = EVENT_ROAMED;
 572         memcpy(ev->rm.bssid, bssid, ETH_ALEN);
 573         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 574         ev->rm.req_ie_len = req_ie_len;
 575         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 576         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 577         ev->rm.resp_ie_len = resp_ie_len;
 578         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 579
 580         spin_lock_irqsave(&wdev->event_lock, flags);
 581         list_add_tail(&ev->list, &wdev->event_list);
 582         spin_unlock_irqrestore(&wdev->event_lock, flags);
 583         schedule_work(&rdev->event_work);
 584 }
 585 EXPORT_SYMBOL(cfg80211_roamed);
 586
 587 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 588                              size_t ie_len, u16 reason, bool from_ap)
 589 {
 590         struct wireless_dev *wdev = dev->ieee80211_ptr;
 591         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 592         int i;
 593 #ifdef CONFIG_WIRELESS_EXT
 594         union iwreq_data wrqu;
 595 #endif
 596
 597         ASSERT_WDEV_LOCK(wdev);
 598
 599         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
 600                 return;
 601
 602         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 603                 return;
 604
 605         if (wdev->current_bss) {
 606                 cfg80211_unhold_bss(wdev->current_bss);
 607                 cfg80211_put_bss(&wdev->current_bss->pub);
 608         }
 609
 610         wdev->current_bss = NULL;
 611         wdev->sme_state = CFG80211_SME_IDLE;
 612         wdev->ssid_len = 0;
 613
 614         if (wdev->conn) {
 615                 const u8 *bssid;
 616                 int ret;
 617
 618                 kfree(wdev->conn->ie);
 619                 wdev->conn->ie = NULL;
 620                 kfree(wdev->conn);
 621                 wdev->conn = NULL;
 622
 623                 /*
 624                  * If this disconnect was due to a disassoc, we
 625                  * we might still have an auth BSS around. For
 626                  * the userspace SME that's currently expected,
 627                  * but for the kernel SME (nl80211 CONNECT or
 628                  * wireless extensions) we want to clear up all
 629                  * state.
 630                  */
 631                 for (i = 0; i < MAX_AUTH_BSSES; i++) {
 632                         if (!wdev->auth_bsses[i])
 633                                 continue;
 634                         bssid = wdev->auth_bsses[i]->pub.bssid;
 635                         ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
 636                                                 WLAN_REASON_DEAUTH_LEAVING);
 637                         WARN(ret, "deauth failed: %d\n", ret);
 638                 }
 639         }
 640
 641         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 642
 643         /*
 644          * Delete all the keys ... pairwise keys can't really
 645          * exist any more anyway, but default keys might.
 646          */
 647         if (rdev->ops->del_key)
 648                 for (i = 0; i < 6; i++)
 649                         rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
 650
 651 #ifdef CONFIG_WIRELESS_EXT
 652         memset(&wrqu, 0, sizeof(wrqu));
 653         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 654         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 655 #endif
 656 }
 657
 658 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 659                            u8 *ie, size_t ie_len, gfp_t gfp)
 660 {
 661         struct wireless_dev *wdev = dev->ieee80211_ptr;
 662         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 663         struct cfg80211_event *ev;
 664         unsigned long flags;
 665
 666         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
 667
 668         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 669         if (!ev)
 670                 return;
 671
 672         ev->type = EVENT_DISCONNECTED;
 673         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 674         ev->dc.ie_len = ie_len;
 675         memcpy((void *)ev->dc.ie, ie, ie_len);
 676         ev->dc.reason = reason;
 677
 678         spin_lock_irqsave(&wdev->event_lock, flags);
 679         list_add_tail(&ev->list, &wdev->event_list);
 680         spin_unlock_irqrestore(&wdev->event_lock, flags);
 681         schedule_work(&rdev->event_work);
 682 }
 683 EXPORT_SYMBOL(cfg80211_disconnected);
 684
 685 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 686                        struct net_device *dev,
 687                        struct cfg80211_connect_params *connect,
 688                        struct cfg80211_cached_keys *connkeys,
 689                        const u8 *prev_bssid)
 690 {
 691         struct wireless_dev *wdev = dev->ieee80211_ptr;
 692         struct ieee80211_channel *chan;
 693         struct cfg80211_bss *bss = NULL;
 694         int err;
 695
 696         ASSERT_WDEV_LOCK(wdev);
 697
 698         if (wdev->sme_state != CFG80211_SME_IDLE)
 699                 return -EALREADY;
 700
 701         chan = rdev_fixed_channel(rdev, wdev);
 702         if (chan && chan != connect->channel)
 703                 return -EBUSY;
 704
 705         if (WARN_ON(wdev->connect_keys)) {
 706                 kfree(wdev->connect_keys);
 707                 wdev->connect_keys = NULL;
 708         }
 709
 710         if (connkeys && connkeys->def >= 0) {
 711                 int idx;
 712                 u32 cipher;
 713
 714                 idx = connkeys->def;
 715                 cipher = connkeys->params[idx].cipher;
 716                 /* If given a WEP key we may need it for shared key auth */
 717                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
 718                     cipher == WLAN_CIPHER_SUITE_WEP104) {
 719                         connect->key_idx = idx;
 720                         connect->key = connkeys->params[idx].key;
 721                         connect->key_len = connkeys->params[idx].key_len;
 722
 723                         /*
 724                          * If ciphers are not set (e.g. when going through
 725                          * iwconfig), we have to set them appropriately here.
 726                          */
 727                         if (connect->crypto.cipher_group == 0)
 728                                 connect->crypto.cipher_group = cipher;
 729
 730                         if (connect->crypto.n_ciphers_pairwise == 0) {
 731                                 connect->crypto.n_ciphers_pairwise = 1;
 732                                 connect->crypto.ciphers_pairwise[0] = cipher;
 733                         }
 734                 }
 735         }
 736
 737         if (!rdev->ops->connect) {
 738                 if (!rdev->ops->auth || !rdev->ops->assoc)
 739                         return -EOPNOTSUPP;
 740
 741                 if (WARN_ON(wdev->conn))
 742                         return -EINPROGRESS;
 743
 744                 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 745                 if (!wdev->conn)
 746                         return -ENOMEM;
 747
 748                 /*
 749                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 750                  */
 751                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 752                 if (connect->bssid) {
 753                         wdev->conn->params.bssid = wdev->conn->bssid;
 754                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 755                 }
 756
 757                 if (connect->ie) {
 758                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 759                                                 GFP_KERNEL);
 760                         wdev->conn->params.ie = wdev->conn->ie;
 761                         if (!wdev->conn->ie) {
 762                                 kfree(wdev->conn);
 763                                 wdev->conn = NULL;
 764                                 return -ENOMEM;
 765                         }
 766                 }
 767
 768                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 769                         wdev->conn->auto_auth = true;
 770                         /* start with open system ... should mostly work */
 771                         wdev->conn->params.auth_type =
 772                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 773                 } else {
 774                         wdev->conn->auto_auth = false;
 775                 }
 776
 777                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 778                 wdev->ssid_len = connect->ssid_len;
 779                 wdev->conn->params.ssid = wdev->ssid;
 780                 wdev->conn->params.ssid_len = connect->ssid_len;
 781
 782                 /* see if we have the bss already */
 783                 bss = cfg80211_get_conn_bss(wdev);
 784
 785                 wdev->sme_state = CFG80211_SME_CONNECTING;
 786                 wdev->connect_keys = connkeys;
 787
 788                 if (prev_bssid) {
 789                         memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 790                         wdev->conn->prev_bssid_valid = true;
 791                 }
 792
 793                 /* we're good if we have a matching bss struct */
 794                 if (bss) {
 795                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 796                         err = cfg80211_conn_do_work(wdev);
 797                         cfg80211_put_bss(bss);
 798                 } else {
 799                         /* otherwise we'll need to scan for the AP first */
 800                         err = cfg80211_conn_scan(wdev);
 801                         /*
 802                          * If we can't scan right now, then we need to scan again
 803                          * after the current scan finished, since the parameters
 804                          * changed (unless we find a good AP anyway).
 805                          */
 806                         if (err == -EBUSY) {
 807                                 err = 0;
 808                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 809                         }
 810                 }
 811                 if (err) {
 812                         kfree(wdev->conn->ie);
 813                         kfree(wdev->conn);
 814                         wdev->conn = NULL;
 815                         wdev->sme_state = CFG80211_SME_IDLE;
 816                         wdev->connect_keys = NULL;
 817                         wdev->ssid_len = 0;
 818                 }
 819
 820                 return err;
 821         } else {
 822                 wdev->sme_state = CFG80211_SME_CONNECTING;
 823                 wdev->connect_keys = connkeys;
 824                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 825                 if (err) {
 826                         wdev->connect_keys = NULL;
 827                         wdev->sme_state = CFG80211_SME_IDLE;
 828                         return err;
 829                 }
 830
 831                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 832                 wdev->ssid_len = connect->ssid_len;
 833
 834                 return 0;
 835         }
 836 }
 837
 838 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 839                      struct net_device *dev,
 840                      struct cfg80211_connect_params *connect,
 841                      struct cfg80211_cached_keys *connkeys)
 842 {
 843         int err;
 844
 845         mutex_lock(&rdev->devlist_mtx);
 846         wdev_lock(dev->ieee80211_ptr);
 847         err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
 848         wdev_unlock(dev->ieee80211_ptr);
 849         mutex_unlock(&rdev->devlist_mtx);
 850
 851         return err;
 852 }
 853
 854 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 855                           struct net_device *dev, u16 reason, bool wextev)
 856 {
 857         struct wireless_dev *wdev = dev->ieee80211_ptr;
 858         int err;
 859
 860         ASSERT_WDEV_LOCK(wdev);
 861
 862         if (wdev->sme_state == CFG80211_SME_IDLE)
 863                 return -EINVAL;
 864
 865         kfree(wdev->connect_keys);
 866         wdev->connect_keys = NULL;
 867
 868         if (!rdev->ops->disconnect) {
 869                 if (!rdev->ops->deauth)
 870                         return -EOPNOTSUPP;
 871
 872                 /* was it connected by userspace SME? */
 873                 if (!wdev->conn) {
 874                         cfg80211_mlme_down(rdev, dev);
 875                         return 0;
 876                 }
 877
 878                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 879                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 880                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 881                         wdev->sme_state = CFG80211_SME_IDLE;
 882                         kfree(wdev->conn->ie);
 883                         kfree(wdev->conn);
 884                         wdev->conn = NULL;
 885                         wdev->ssid_len = 0;
 886                         return 0;
 887                 }
 888
 889                 /* wdev->conn->params.bssid must be set if > SCANNING */
 890                 err = __cfg80211_mlme_deauth(rdev, dev,
 891                                              wdev->conn->params.bssid,
 892                                              NULL, 0, reason);
 893                 if (err)
 894                         return err;
 895         } else {
 896                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 897                 if (err)
 898                         return err;
 899         }
 900
 901         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 902                 __cfg80211_disconnected(dev, NULL, 0, 0, false);
 903         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 904                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 905                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 906                                           wextev, NULL);
 907
 908         return 0;
 909 }
 910
 911 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 912                         struct net_device *dev,
 913                         u16 reason, bool wextev)
 914 {
 915         int err;
 916
 917         wdev_lock(dev->ieee80211_ptr);
 918         err = __cfg80211_disconnect(rdev, dev, reason, wextev);
 919         wdev_unlock(dev->ieee80211_ptr);
 920
 921         return err;
 922 }
 923
 924 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
 925 {
 926         struct wireless_dev *wdev = dev->ieee80211_ptr;
 927         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 928         u8 bssid[ETH_ALEN];
 929
 930         ASSERT_WDEV_LOCK(wdev);
 931
 932         if (!wdev->conn)
 933                 return;
 934
 935         if (wdev->conn->state == CFG80211_CONN_IDLE)
 936                 return;
 937
 938         /*
 939          * Ok, so the association was made by this SME -- we don't
 940          * want it any more so deauthenticate too.
 941          */
 942
 943         if (!wdev->auth_bsses[idx])
 944                 return;
 945
 946         memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
 947         if (__cfg80211_mlme_deauth(rdev, dev, bssid,
 948                                    NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
 949                 /* whatever -- assume gone anyway */
 950                 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
 951                 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
 952                 wdev->auth_bsses[idx] = NULL;
 953         }
 954 }