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/slab.h>
  11 #include <linux/workqueue.h>
  12 #include <linux/wireless.h>
  13 #include <net/iw_handler.h>
  14 #include <net/cfg80211.h>
  15 #include <net/rtnetlink.h>
  16 #include "nl80211.h"
  17 #include "reg.h"
  18
  19 struct cfg80211_conn {
  20         struct cfg80211_connect_params params;
  21         /* these are sub-states of the _CONNECTING sme_state */
  22         enum {
  23                 CFG80211_CONN_IDLE,
  24                 CFG80211_CONN_SCANNING,
  25                 CFG80211_CONN_SCAN_AGAIN,
  26                 CFG80211_CONN_AUTHENTICATE_NEXT,
  27                 CFG80211_CONN_AUTHENTICATING,
  28                 CFG80211_CONN_ASSOCIATE_NEXT,
  29                 CFG80211_CONN_ASSOCIATING,
  30                 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
  31         } state;
  32         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  33         u8 *ie;
  34         size_t ie_len;
  35         bool auto_auth, prev_bssid_valid;
  36 };
  37
  38 static bool cfg80211_is_all_idle(void)
  39 {
  40         struct cfg80211_registered_device *rdev;
  41         struct wireless_dev *wdev;
  42         bool is_all_idle = true;
  43
  44         mutex_lock(&cfg80211_mutex);
  45
  46         /*
  47          * All devices must be idle as otherwise if you are actively
  48          * scanning some new beacon hints could be learned and would
  49          * count as new regulatory hints.
  50          */
  51         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  52                 cfg80211_lock_rdev(rdev);
  53                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
  54                         wdev_lock(wdev);
  55                         if (wdev->sme_state != CFG80211_SME_IDLE)
  56                                 is_all_idle = false;
  57                         wdev_unlock(wdev);
  58                 }
  59                 cfg80211_unlock_rdev(rdev);
  60         }
  61
  62         mutex_unlock(&cfg80211_mutex);
  63
  64         return is_all_idle;
  65 }
  66
  67 static void disconnect_work(struct work_struct *work)
  68 {
  69         if (!cfg80211_is_all_idle())
  70                 return;
  71
  72         regulatory_hint_disconnect();
  73 }
  74
  75 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
  76
  77 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  78 {
  79         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  80         struct cfg80211_scan_request *request;
  81         int n_channels, err;
  82
  83         ASSERT_RTNL();
  84         ASSERT_RDEV_LOCK(rdev);
  85         ASSERT_WDEV_LOCK(wdev);
  86
  87         if (rdev->scan_req)
  88                 return -EBUSY;
  89
  90         if (wdev->conn->params.channel) {
  91                 n_channels = 1;
  92         } else {
  93                 enum ieee80211_band band;
  94                 n_channels = 0;
  95
  96                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  97                         if (!wdev->wiphy->bands[band])
  98                                 continue;
  99                         n_channels += wdev->wiphy->bands[band]->n_channels;
 100                 }
 101         }
 102         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
 103                           sizeof(request->channels[0]) * n_channels,
 104                           GFP_KERNEL);
 105         if (!request)
 106                 return -ENOMEM;
 107
 108         if (wdev->conn->params.channel)
 109                 request->channels[0] = wdev->conn->params.channel;
 110         else {
 111                 int i = 0, j;
 112                 enum ieee80211_band band;
 113
 114                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 115                         if (!wdev->wiphy->bands[band])
 116                                 continue;
 117                         for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
 118                              i++, j++)
 119                                 request->channels[i] =
 120                                         &wdev->wiphy->bands[band]->channels[j];
 121                 }
 122         }
 123         request->n_channels = n_channels;
 124         request->ssids = (void *)&request->channels[n_channels];
 125         request->n_ssids = 1;
 126
 127         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 128                 wdev->conn->params.ssid_len);
 129         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 130
 131         request->dev = wdev->netdev;
 132         request->wiphy = &rdev->wiphy;
 133
 134         rdev->scan_req = request;
 135
 136         err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
 137         if (!err) {
 138                 wdev->conn->state = CFG80211_CONN_SCANNING;
 139                 nl80211_send_scan_start(rdev, wdev->netdev);
 140                 dev_hold(wdev->netdev);
 141         } else {
 142                 rdev->scan_req = NULL;
 143                 kfree(request);
 144         }
 145         return err;
 146 }
 147
 148 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 149 {
 150         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 151         struct cfg80211_connect_params *params;
 152         const u8 *prev_bssid = NULL;
 153         int err;
 154
 155         ASSERT_WDEV_LOCK(wdev);
 156
 157         if (!wdev->conn)
 158                 return 0;
 159
 160         params = &wdev->conn->params;
 161
 162         switch (wdev->conn->state) {
 163         case CFG80211_CONN_SCAN_AGAIN:
 164                 return cfg80211_conn_scan(wdev);
 165         case CFG80211_CONN_AUTHENTICATE_NEXT:
 166                 BUG_ON(!rdev->ops->auth);
 167                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 168                 return __cfg80211_mlme_auth(rdev, wdev->netdev,
 169                                             params->channel, params->auth_type,
 170                                             params->bssid,
 171                                             params->ssid, params->ssid_len,
 172                                             NULL, 0,
 173                                             params->key, params->key_len,
 174                                             params->key_idx, false);
 175         case CFG80211_CONN_ASSOCIATE_NEXT:
 176                 BUG_ON(!rdev->ops->assoc);
 177                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 178                 if (wdev->conn->prev_bssid_valid)
 179                         prev_bssid = wdev->conn->prev_bssid;
 180                 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
 181                                             params->channel, params->bssid,
 182                                             prev_bssid,
 183                                             params->ssid, params->ssid_len,
 184                                             params->ie, params->ie_len,
 185                                             false, &params->crypto);
 186                 if (err)
 187                         __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 188                                                NULL, 0,
 189                                                WLAN_REASON_DEAUTH_LEAVING,
 190                                                false);
 191                 return err;
 192         case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
 193                 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 194                                        NULL, 0,
 195                                        WLAN_REASON_DEAUTH_LEAVING, false);
 196                 /* return an error so that we call __cfg80211_connect_result() */
 197                 return -EINVAL;
 198         default:
 199                 return 0;
 200         }
 201 }
 202
 203 void cfg80211_conn_work(struct work_struct *work)
 204 {
 205         struct cfg80211_registered_device *rdev =
 206                 container_of(work, struct cfg80211_registered_device, conn_work);
 207         struct wireless_dev *wdev;
 208         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 209
 210         rtnl_lock();
 211         cfg80211_lock_rdev(rdev);
 212         mutex_lock(&rdev->devlist_mtx);
 213
 214         list_for_each_entry(wdev, &rdev->netdev_list, list) {
 215                 wdev_lock(wdev);
 216                 if (!netif_running(wdev->netdev)) {
 217                         wdev_unlock(wdev);
 218                         continue;
 219                 }
 220                 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
 221                         wdev_unlock(wdev);
 222                         continue;
 223                 }
 224                 if (wdev->conn->params.bssid) {
 225                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 226                         bssid = bssid_buf;
 227                 }
 228                 if (cfg80211_conn_do_work(wdev))
 229                         __cfg80211_connect_result(
 230                                         wdev->netdev, bssid,
 231                                         NULL, 0, NULL, 0,
 232                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 233                                         false, NULL);
 234                 wdev_unlock(wdev);
 235         }
 236
 237         mutex_unlock(&rdev->devlist_mtx);
 238         cfg80211_unlock_rdev(rdev);
 239         rtnl_unlock();
 240 }
 241
 242 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 243 {
 244         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 245         struct cfg80211_bss *bss;
 246         u16 capa = WLAN_CAPABILITY_ESS;
 247
 248         ASSERT_WDEV_LOCK(wdev);
 249
 250         if (wdev->conn->params.privacy)
 251                 capa |= WLAN_CAPABILITY_PRIVACY;
 252
 253         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 254                                wdev->conn->params.bssid,
 255                                wdev->conn->params.ssid,
 256                                wdev->conn->params.ssid_len,
 257                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 258                                capa);
 259         if (!bss)
 260                 return NULL;
 261
 262         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 263         wdev->conn->params.bssid = wdev->conn->bssid;
 264         wdev->conn->params.channel = bss->channel;
 265         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 266         schedule_work(&rdev->conn_work);
 267
 268         return bss;
 269 }
 270
 271 static void __cfg80211_sme_scan_done(struct net_device *dev)
 272 {
 273         struct wireless_dev *wdev = dev->ieee80211_ptr;
 274         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 275         struct cfg80211_bss *bss;
 276
 277         ASSERT_WDEV_LOCK(wdev);
 278
 279         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 280                 return;
 281
 282         if (!wdev->conn)
 283                 return;
 284
 285         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 286             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 287                 return;
 288
 289         bss = cfg80211_get_conn_bss(wdev);
 290         if (bss) {
 291                 cfg80211_put_bss(bss);
 292         } else {
 293                 /* not found */
 294                 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
 295                         schedule_work(&rdev->conn_work);
 296                 else
 297                         __cfg80211_connect_result(
 298                                         wdev->netdev,
 299                                         wdev->conn->params.bssid,
 300                                         NULL, 0, NULL, 0,
 301                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 302                                         false, NULL);
 303         }
 304 }
 305
 306 void cfg80211_sme_scan_done(struct net_device *dev)
 307 {
 308         struct wireless_dev *wdev = dev->ieee80211_ptr;
 309
 310         mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
 311         wdev_lock(wdev);
 312         __cfg80211_sme_scan_done(dev);
 313         wdev_unlock(wdev);
 314         mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
 315 }
 316
 317 void cfg80211_sme_rx_auth(struct net_device *dev,
 318                           const u8 *buf, size_t len)
 319 {
 320         struct wireless_dev *wdev = dev->ieee80211_ptr;
 321         struct wiphy *wiphy = wdev->wiphy;
 322         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 323         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 324         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 325
 326         ASSERT_WDEV_LOCK(wdev);
 327
 328         /* should only RX auth frames when connecting */
 329         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 330                 return;
 331
 332         if (WARN_ON(!wdev->conn))
 333                 return;
 334
 335         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 336             wdev->conn->auto_auth &&
 337             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 338                 /* select automatically between only open, shared, leap */
 339                 switch (wdev->conn->params.auth_type) {
 340                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 341                         if (wdev->connect_keys)
 342                                 wdev->conn->params.auth_type =
 343                                         NL80211_AUTHTYPE_SHARED_KEY;
 344                         else
 345                                 wdev->conn->params.auth_type =
 346                                         NL80211_AUTHTYPE_NETWORK_EAP;
 347                         break;
 348                 case NL80211_AUTHTYPE_SHARED_KEY:
 349                         wdev->conn->params.auth_type =
 350                                 NL80211_AUTHTYPE_NETWORK_EAP;
 351                         break;
 352                 default:
 353                         /* huh? */
 354                         wdev->conn->params.auth_type =
 355                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 356                         break;
 357                 }
 358                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 359                 schedule_work(&rdev->conn_work);
 360         } else if (status_code != WLAN_STATUS_SUCCESS) {
 361                 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 362                                           status_code, false, NULL);
 363         } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 364                  wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 365                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 366                 schedule_work(&rdev->conn_work);
 367         }
 368 }
 369
 370 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
 371 {
 372         struct wiphy *wiphy = wdev->wiphy;
 373         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 374
 375         if (WARN_ON(!wdev->conn))
 376                 return false;
 377
 378         if (!wdev->conn->prev_bssid_valid)
 379                 return false;
 380
 381         /*
 382          * Some stupid APs don't accept reassoc, so we
 383          * need to fall back to trying regular assoc.
 384          */
 385         wdev->conn->prev_bssid_valid = false;
 386         wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 387         schedule_work(&rdev->conn_work);
 388
 389         return true;
 390 }
 391
 392 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
 393 {
 394         struct wiphy *wiphy = wdev->wiphy;
 395         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 396
 397         wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
 398         schedule_work(&rdev->conn_work);
 399 }
 400
 401 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 402                                const u8 *req_ie, size_t req_ie_len,
 403                                const u8 *resp_ie, size_t resp_ie_len,
 404                                u16 status, bool wextev,
 405                                struct cfg80211_bss *bss)
 406 {
 407         struct wireless_dev *wdev = dev->ieee80211_ptr;
 408         u8 *country_ie;
 409 #ifdef CONFIG_CFG80211_WEXT
 410         union iwreq_data wrqu;
 411 #endif
 412
 413         ASSERT_WDEV_LOCK(wdev);
 414
 415         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 416                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 417                 return;
 418
 419         if (wdev->sme_state != CFG80211_SME_CONNECTING)
 420                 return;
 421
 422         nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 423                                     bssid, req_ie, req_ie_len,
 424                                     resp_ie, resp_ie_len,
 425                                     status, GFP_KERNEL);
 426
 427 #ifdef CONFIG_CFG80211_WEXT
 428         if (wextev) {
 429                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 430                         memset(&wrqu, 0, sizeof(wrqu));
 431                         wrqu.data.length = req_ie_len;
 432                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 433                 }
 434
 435                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 436                         memset(&wrqu, 0, sizeof(wrqu));
 437                         wrqu.data.length = resp_ie_len;
 438                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 439                 }
 440
 441                 memset(&wrqu, 0, sizeof(wrqu));
 442                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 443                 if (bssid && status == WLAN_STATUS_SUCCESS) {
 444                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 445                         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 446                         wdev->wext.prev_bssid_valid = true;
 447                 }
 448                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 449         }
 450 #endif
 451
 452         if (wdev->current_bss) {
 453                 cfg80211_unhold_bss(wdev->current_bss);
 454                 cfg80211_put_bss(&wdev->current_bss->pub);
 455                 wdev->current_bss = NULL;
 456         }
 457
 458         if (wdev->conn)
 459                 wdev->conn->state = CFG80211_CONN_IDLE;
 460
 461         if (status != WLAN_STATUS_SUCCESS) {
 462                 wdev->sme_state = CFG80211_SME_IDLE;
 463                 if (wdev->conn)
 464                         kfree(wdev->conn->ie);
 465                 kfree(wdev->conn);
 466                 wdev->conn = NULL;
 467                 kfree(wdev->connect_keys);
 468                 wdev->connect_keys = NULL;
 469                 wdev->ssid_len = 0;
 470                 return;
 471         }
 472
 473         if (!bss)
 474                 bss = cfg80211_get_bss(wdev->wiphy,
 475                                        wdev->conn ? wdev->conn->params.channel :
 476                                        NULL,
 477                                        bssid,
 478                                        wdev->ssid, wdev->ssid_len,
 479                                        WLAN_CAPABILITY_ESS,
 480                                        WLAN_CAPABILITY_ESS);
 481
 482         if (WARN_ON(!bss))
 483                 return;
 484
 485         cfg80211_hold_bss(bss_from_pub(bss));
 486         wdev->current_bss = bss_from_pub(bss);
 487
 488         wdev->sme_state = CFG80211_SME_CONNECTED;
 489         cfg80211_upload_connect_keys(wdev);
 490
 491         country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
 492
 493         if (!country_ie)
 494                 return;
 495
 496         /*
 497          * ieee80211_bss_get_ie() ensures we can access:
 498          * - country_ie + 2, the start of the country ie data, and
 499          * - and country_ie[1] which is the IE length
 500          */
 501         regulatory_hint_11d(wdev->wiphy,
 502                             bss->channel->band,
 503                             country_ie + 2,
 504                             country_ie[1]);
 505 }
 506
 507 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 508                              const u8 *req_ie, size_t req_ie_len,
 509                              const u8 *resp_ie, size_t resp_ie_len,
 510                              u16 status, gfp_t gfp)
 511 {
 512         struct wireless_dev *wdev = dev->ieee80211_ptr;
 513         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 514         struct cfg80211_event *ev;
 515         unsigned long flags;
 516
 517         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
 518
 519         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 520         if (!ev)
 521                 return;
 522
 523         ev->type = EVENT_CONNECT_RESULT;
 524         if (bssid)
 525                 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 526         if (req_ie_len) {
 527                 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 528                 ev->cr.req_ie_len = req_ie_len;
 529                 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 530         }
 531         if (resp_ie_len) {
 532                 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 533                 ev->cr.resp_ie_len = resp_ie_len;
 534                 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 535         }
 536         ev->cr.status = status;
 537
 538         spin_lock_irqsave(&wdev->event_lock, flags);
 539         list_add_tail(&ev->list, &wdev->event_list);
 540         spin_unlock_irqrestore(&wdev->event_lock, flags);
 541         queue_work(cfg80211_wq, &rdev->event_work);
 542 }
 543 EXPORT_SYMBOL(cfg80211_connect_result);
 544
 545 void __cfg80211_roamed(struct wireless_dev *wdev,
 546                        struct ieee80211_channel *channel,
 547                        const u8 *bssid,
 548                        const u8 *req_ie, size_t req_ie_len,
 549                        const u8 *resp_ie, size_t resp_ie_len)
 550 {
 551         struct cfg80211_bss *bss;
 552 #ifdef CONFIG_CFG80211_WEXT
 553         union iwreq_data wrqu;
 554 #endif
 555
 556         ASSERT_WDEV_LOCK(wdev);
 557
 558         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 559                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 560                 return;
 561
 562         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 563                 return;
 564
 565         /* internal error -- how did we get to CONNECTED w/o BSS? */
 566         if (WARN_ON(!wdev->current_bss)) {
 567                 return;
 568         }
 569
 570         cfg80211_unhold_bss(wdev->current_bss);
 571         cfg80211_put_bss(&wdev->current_bss->pub);
 572         wdev->current_bss = NULL;
 573
 574         bss = cfg80211_get_bss(wdev->wiphy, channel, bssid,
 575                                wdev->ssid, wdev->ssid_len,
 576                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 577
 578         if (WARN_ON(!bss))
 579                 return;
 580
 581         cfg80211_hold_bss(bss_from_pub(bss));
 582         wdev->current_bss = bss_from_pub(bss);
 583
 584         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
 585                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 586                             GFP_KERNEL);
 587
 588 #ifdef CONFIG_CFG80211_WEXT
 589         if (req_ie) {
 590                 memset(&wrqu, 0, sizeof(wrqu));
 591                 wrqu.data.length = req_ie_len;
 592                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 593                                     &wrqu, req_ie);
 594         }
 595
 596         if (resp_ie) {
 597                 memset(&wrqu, 0, sizeof(wrqu));
 598                 wrqu.data.length = resp_ie_len;
 599                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 600                                     &wrqu, resp_ie);
 601         }
 602
 603         memset(&wrqu, 0, sizeof(wrqu));
 604         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 605         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 606         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 607         wdev->wext.prev_bssid_valid = true;
 608         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 609 #endif
 610 }
 611
 612 void cfg80211_roamed(struct net_device *dev,
 613                      struct ieee80211_channel *channel,
 614                      const u8 *bssid,
 615                      const u8 *req_ie, size_t req_ie_len,
 616                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 617 {
 618         struct wireless_dev *wdev = dev->ieee80211_ptr;
 619         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 620         struct cfg80211_event *ev;
 621         unsigned long flags;
 622
 623         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
 624
 625         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 626         if (!ev)
 627                 return;
 628
 629         ev->type = EVENT_ROAMED;
 630         ev->rm.channel = channel;
 631         memcpy(ev->rm.bssid, bssid, ETH_ALEN);
 632         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 633         ev->rm.req_ie_len = req_ie_len;
 634         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 635         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 636         ev->rm.resp_ie_len = resp_ie_len;
 637         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 638
 639         spin_lock_irqsave(&wdev->event_lock, flags);
 640         list_add_tail(&ev->list, &wdev->event_list);
 641         spin_unlock_irqrestore(&wdev->event_lock, flags);
 642         queue_work(cfg80211_wq, &rdev->event_work);
 643 }
 644 EXPORT_SYMBOL(cfg80211_roamed);
 645
 646 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 647                              size_t ie_len, u16 reason, bool from_ap)
 648 {
 649         struct wireless_dev *wdev = dev->ieee80211_ptr;
 650         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 651         int i;
 652 #ifdef CONFIG_CFG80211_WEXT
 653         union iwreq_data wrqu;
 654 #endif
 655
 656         ASSERT_WDEV_LOCK(wdev);
 657
 658         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 659                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 660                 return;
 661
 662         if (wdev->sme_state != CFG80211_SME_CONNECTED)
 663                 return;
 664
 665         if (wdev->current_bss) {
 666                 cfg80211_unhold_bss(wdev->current_bss);
 667                 cfg80211_put_bss(&wdev->current_bss->pub);
 668         }
 669
 670         wdev->current_bss = NULL;
 671         wdev->sme_state = CFG80211_SME_IDLE;
 672         wdev->ssid_len = 0;
 673
 674         if (wdev->conn) {
 675                 const u8 *bssid;
 676                 int ret;
 677
 678                 kfree(wdev->conn->ie);
 679                 wdev->conn->ie = NULL;
 680                 kfree(wdev->conn);
 681                 wdev->conn = NULL;
 682
 683                 /*
 684                  * If this disconnect was due to a disassoc, we
 685                  * we might still have an auth BSS around. For
 686                  * the userspace SME that's currently expected,
 687                  * but for the kernel SME (nl80211 CONNECT or
 688                  * wireless extensions) we want to clear up all
 689                  * state.
 690                  */
 691                 for (i = 0; i < MAX_AUTH_BSSES; i++) {
 692                         if (!wdev->auth_bsses[i])
 693                                 continue;
 694                         bssid = wdev->auth_bsses[i]->pub.bssid;
 695                         ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
 696                                                 WLAN_REASON_DEAUTH_LEAVING,
 697                                                 false);
 698                         WARN(ret, "deauth failed: %d\n", ret);
 699                 }
 700         }
 701
 702         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 703
 704         /*
 705          * Delete all the keys ... pairwise keys can't really
 706          * exist any more anyway, but default keys might.
 707          */
 708         if (rdev->ops->del_key)
 709                 for (i = 0; i < 6; i++)
 710                         rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
 711
 712 #ifdef CONFIG_CFG80211_WEXT
 713         memset(&wrqu, 0, sizeof(wrqu));
 714         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 715         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 716         wdev->wext.connect.ssid_len = 0;
 717 #endif
 718
 719         schedule_work(&cfg80211_disconnect_work);
 720 }
 721
 722 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 723                            u8 *ie, size_t ie_len, gfp_t gfp)
 724 {
 725         struct wireless_dev *wdev = dev->ieee80211_ptr;
 726         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 727         struct cfg80211_event *ev;
 728         unsigned long flags;
 729
 730         CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
 731
 732         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 733         if (!ev)
 734                 return;
 735
 736         ev->type = EVENT_DISCONNECTED;
 737         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 738         ev->dc.ie_len = ie_len;
 739         memcpy((void *)ev->dc.ie, ie, ie_len);
 740         ev->dc.reason = reason;
 741
 742         spin_lock_irqsave(&wdev->event_lock, flags);
 743         list_add_tail(&ev->list, &wdev->event_list);
 744         spin_unlock_irqrestore(&wdev->event_lock, flags);
 745         queue_work(cfg80211_wq, &rdev->event_work);
 746 }
 747 EXPORT_SYMBOL(cfg80211_disconnected);
 748
 749 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 750                        struct net_device *dev,
 751                        struct cfg80211_connect_params *connect,
 752                        struct cfg80211_cached_keys *connkeys,
 753                        const u8 *prev_bssid)
 754 {
 755         struct wireless_dev *wdev = dev->ieee80211_ptr;
 756         struct cfg80211_bss *bss = NULL;
 757         int err;
 758
 759         ASSERT_WDEV_LOCK(wdev);
 760
 761         if (wdev->sme_state != CFG80211_SME_IDLE)
 762                 return -EALREADY;
 763
 764         if (WARN_ON(wdev->connect_keys)) {
 765                 kfree(wdev->connect_keys);
 766                 wdev->connect_keys = NULL;
 767         }
 768
 769         if (connkeys && connkeys->def >= 0) {
 770                 int idx;
 771                 u32 cipher;
 772
 773                 idx = connkeys->def;
 774                 cipher = connkeys->params[idx].cipher;
 775                 /* If given a WEP key we may need it for shared key auth */
 776                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
 777                     cipher == WLAN_CIPHER_SUITE_WEP104) {
 778                         connect->key_idx = idx;
 779                         connect->key = connkeys->params[idx].key;
 780                         connect->key_len = connkeys->params[idx].key_len;
 781
 782                         /*
 783                          * If ciphers are not set (e.g. when going through
 784                          * iwconfig), we have to set them appropriately here.
 785                          */
 786                         if (connect->crypto.cipher_group == 0)
 787                                 connect->crypto.cipher_group = cipher;
 788
 789                         if (connect->crypto.n_ciphers_pairwise == 0) {
 790                                 connect->crypto.n_ciphers_pairwise = 1;
 791                                 connect->crypto.ciphers_pairwise[0] = cipher;
 792                         }
 793                 }
 794         }
 795
 796         if (!rdev->ops->connect) {
 797                 if (!rdev->ops->auth || !rdev->ops->assoc)
 798                         return -EOPNOTSUPP;
 799
 800                 if (WARN_ON(wdev->conn))
 801                         return -EINPROGRESS;
 802
 803                 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 804                 if (!wdev->conn)
 805                         return -ENOMEM;
 806
 807                 /*
 808                  * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 809                  */
 810                 memcpy(&wdev->conn->params, connect, sizeof(*connect));
 811                 if (connect->bssid) {
 812                         wdev->conn->params.bssid = wdev->conn->bssid;
 813                         memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 814                 }
 815
 816                 if (connect->ie) {
 817                         wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 818                                                 GFP_KERNEL);
 819                         wdev->conn->params.ie = wdev->conn->ie;
 820                         if (!wdev->conn->ie) {
 821                                 kfree(wdev->conn);
 822                                 wdev->conn = NULL;
 823                                 return -ENOMEM;
 824                         }
 825                 }
 826
 827                 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 828                         wdev->conn->auto_auth = true;
 829                         /* start with open system ... should mostly work */
 830                         wdev->conn->params.auth_type =
 831                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 832                 } else {
 833                         wdev->conn->auto_auth = false;
 834                 }
 835
 836                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 837                 wdev->ssid_len = connect->ssid_len;
 838                 wdev->conn->params.ssid = wdev->ssid;
 839                 wdev->conn->params.ssid_len = connect->ssid_len;
 840
 841                 /* see if we have the bss already */
 842                 bss = cfg80211_get_conn_bss(wdev);
 843
 844                 wdev->sme_state = CFG80211_SME_CONNECTING;
 845                 wdev->connect_keys = connkeys;
 846
 847                 if (prev_bssid) {
 848                         memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 849                         wdev->conn->prev_bssid_valid = true;
 850                 }
 851
 852                 /* we're good if we have a matching bss struct */
 853                 if (bss) {
 854                         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 855                         err = cfg80211_conn_do_work(wdev);
 856                         cfg80211_put_bss(bss);
 857                 } else {
 858                         /* otherwise we'll need to scan for the AP first */
 859                         err = cfg80211_conn_scan(wdev);
 860                         /*
 861                          * If we can't scan right now, then we need to scan again
 862                          * after the current scan finished, since the parameters
 863                          * changed (unless we find a good AP anyway).
 864                          */
 865                         if (err == -EBUSY) {
 866                                 err = 0;
 867                                 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 868                         }
 869                 }
 870                 if (err) {
 871                         kfree(wdev->conn->ie);
 872                         kfree(wdev->conn);
 873                         wdev->conn = NULL;
 874                         wdev->sme_state = CFG80211_SME_IDLE;
 875                         wdev->connect_keys = NULL;
 876                         wdev->ssid_len = 0;
 877                 }
 878
 879                 return err;
 880         } else {
 881                 wdev->sme_state = CFG80211_SME_CONNECTING;
 882                 wdev->connect_keys = connkeys;
 883                 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
 884                 if (err) {
 885                         wdev->connect_keys = NULL;
 886                         wdev->sme_state = CFG80211_SME_IDLE;
 887                         return err;
 888                 }
 889
 890                 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 891                 wdev->ssid_len = connect->ssid_len;
 892
 893                 return 0;
 894         }
 895 }
 896
 897 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 898                      struct net_device *dev,
 899                      struct cfg80211_connect_params *connect,
 900                      struct cfg80211_cached_keys *connkeys)
 901 {
 902         int err;
 903
 904         mutex_lock(&rdev->devlist_mtx);
 905         wdev_lock(dev->ieee80211_ptr);
 906         err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
 907         wdev_unlock(dev->ieee80211_ptr);
 908         mutex_unlock(&rdev->devlist_mtx);
 909
 910         return err;
 911 }
 912
 913 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 914                           struct net_device *dev, u16 reason, bool wextev)
 915 {
 916         struct wireless_dev *wdev = dev->ieee80211_ptr;
 917         int err;
 918
 919         ASSERT_WDEV_LOCK(wdev);
 920
 921         if (wdev->sme_state == CFG80211_SME_IDLE)
 922                 return -EINVAL;
 923
 924         kfree(wdev->connect_keys);
 925         wdev->connect_keys = NULL;
 926
 927         if (!rdev->ops->disconnect) {
 928                 if (!rdev->ops->deauth)
 929                         return -EOPNOTSUPP;
 930
 931                 /* was it connected by userspace SME? */
 932                 if (!wdev->conn) {
 933                         cfg80211_mlme_down(rdev, dev);
 934                         return 0;
 935                 }
 936
 937                 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
 938                     (wdev->conn->state == CFG80211_CONN_SCANNING ||
 939                      wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
 940                         wdev->sme_state = CFG80211_SME_IDLE;
 941                         kfree(wdev->conn->ie);
 942                         kfree(wdev->conn);
 943                         wdev->conn = NULL;
 944                         wdev->ssid_len = 0;
 945                         return 0;
 946                 }
 947
 948                 /* wdev->conn->params.bssid must be set if > SCANNING */
 949                 err = __cfg80211_mlme_deauth(rdev, dev,
 950                                              wdev->conn->params.bssid,
 951                                              NULL, 0, reason, false);
 952                 if (err)
 953                         return err;
 954         } else {
 955                 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
 956                 if (err)
 957                         return err;
 958         }
 959
 960         if (wdev->sme_state == CFG80211_SME_CONNECTED)
 961                 __cfg80211_disconnected(dev, NULL, 0, 0, false);
 962         else if (wdev->sme_state == CFG80211_SME_CONNECTING)
 963                 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
 964                                           WLAN_STATUS_UNSPECIFIED_FAILURE,
 965                                           wextev, NULL);
 966
 967         return 0;
 968 }
 969
 970 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 971                         struct net_device *dev,
 972                         u16 reason, bool wextev)
 973 {
 974         int err;
 975
 976         wdev_lock(dev->ieee80211_ptr);
 977         err = __cfg80211_disconnect(rdev, dev, reason, wextev);
 978         wdev_unlock(dev->ieee80211_ptr);
 979
 980         return err;
 981 }
 982
 983 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
 984 {
 985         struct wireless_dev *wdev = dev->ieee80211_ptr;
 986         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 987         u8 bssid[ETH_ALEN];
 988
 989         ASSERT_WDEV_LOCK(wdev);
 990
 991         if (!wdev->conn)
 992                 return;
 993
 994         if (wdev->conn->state == CFG80211_CONN_IDLE)
 995                 return;
 996
 997         /*
 998          * Ok, so the association was made by this SME -- we don't
 999          * want it any more so deauthenticate too.
1000          */
1001
1002         if (!wdev->auth_bsses[idx])
1003                 return;
1004
1005         memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
1006         if (__cfg80211_mlme_deauth(rdev, dev, bssid,
1007                                    NULL, 0, WLAN_REASON_DEAUTH_LEAVING,
1008                                    false)) {
1009                 /* whatever -- assume gone anyway */
1010                 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
1011                 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
1012                 wdev->auth_bsses[idx] = NULL;
1013         }
1014 }