net/wireless/sme.c

   1 /*
   2  * SME code for cfg80211
   3  * both driver SME event handling and the SME implementation
   4  * (for nl80211's connect() and wext)
   5  *
   6  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (C) 2009   Intel Corporation. All rights reserved.
   8  */
   9
  10 #include <linux/etherdevice.h>
  11 #include <linux/if_arp.h>
  12 #include <linux/slab.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/wireless.h>
  15 #include <linux/export.h>
  16 #include <net/iw_handler.h>
  17 #include <net/cfg80211.h>
  18 #include <net/rtnetlink.h>
  19 #include "nl80211.h"
  20 #include "reg.h"
  21 #include "rdev-ops.h"
  22
  23 /*
  24  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  25  * driver. This is is for implementing nl80211's connect/disconnect
  26  * and wireless extensions (if configured.)
  27  */
  28
  29 struct cfg80211_conn {
  30         struct cfg80211_connect_params params;
  31         /* these are sub-states of the _CONNECTING sme_state */
  32         enum {
  33                 CFG80211_CONN_SCANNING,
  34                 CFG80211_CONN_SCAN_AGAIN,
  35                 CFG80211_CONN_AUTHENTICATE_NEXT,
  36                 CFG80211_CONN_AUTHENTICATING,
  37                 CFG80211_CONN_AUTH_FAILED,
  38                 CFG80211_CONN_ASSOCIATE_NEXT,
  39                 CFG80211_CONN_ASSOCIATING,
  40                 CFG80211_CONN_ASSOC_FAILED,
  41                 CFG80211_CONN_DEAUTH,
  42                 CFG80211_CONN_CONNECTED,
  43         } state;
  44         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  45         u8 *ie;
  46         size_t ie_len;
  47         bool auto_auth, prev_bssid_valid;
  48 };
  49
  50 static void cfg80211_sme_free(struct wireless_dev *wdev)
  51 {
  52         if (!wdev->conn)
  53                 return;
  54
  55         kfree(wdev->conn->ie);
  56         kfree(wdev->conn);
  57         wdev->conn = NULL;
  58 }
  59
  60 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  61 {
  62         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  63         struct cfg80211_scan_request *request;
  64         int n_channels, err;
  65
  66         ASSERT_RTNL();
  67         ASSERT_RDEV_LOCK(rdev);
  68         ASSERT_WDEV_LOCK(wdev);
  69
  70         if (rdev->scan_req)
  71                 return -EBUSY;
  72
  73         if (wdev->conn->params.channel) {
  74                 n_channels = 1;
  75         } else {
  76                 enum ieee80211_band band;
  77                 n_channels = 0;
  78
  79                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  80                         if (!wdev->wiphy->bands[band])
  81                                 continue;
  82                         n_channels += wdev->wiphy->bands[band]->n_channels;
  83                 }
  84         }
  85         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  86                           sizeof(request->channels[0]) * n_channels,
  87                           GFP_KERNEL);
  88         if (!request)
  89                 return -ENOMEM;
  90
  91         if (wdev->conn->params.channel)
  92                 request->channels[0] = wdev->conn->params.channel;
  93         else {
  94                 int i = 0, j;
  95                 enum ieee80211_band band;
  96                 struct ieee80211_supported_band *bands;
  97                 struct ieee80211_channel *channel;
  98
  99                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 100                         bands = wdev->wiphy->bands[band];
 101                         if (!bands)
 102                                 continue;
 103                         for (j = 0; j < bands->n_channels; j++) {
 104                                 channel = &bands->channels[j];
 105                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 106                                         continue;
 107                                 request->channels[i++] = channel;
 108                         }
 109                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 110                 }
 111                 n_channels = i;
 112         }
 113         request->n_channels = n_channels;
 114         request->ssids = (void *)&request->channels[n_channels];
 115         request->n_ssids = 1;
 116
 117         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 118                 wdev->conn->params.ssid_len);
 119         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 120
 121         request->wdev = wdev;
 122         request->wiphy = &rdev->wiphy;
 123         request->scan_start = jiffies;
 124
 125         rdev->scan_req = request;
 126
 127         err = rdev_scan(rdev, request);
 128         if (!err) {
 129                 wdev->conn->state = CFG80211_CONN_SCANNING;
 130                 nl80211_send_scan_start(rdev, wdev);
 131                 dev_hold(wdev->netdev);
 132         } else {
 133                 rdev->scan_req = NULL;
 134                 kfree(request);
 135         }
 136         return err;
 137 }
 138
 139 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 140 {
 141         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 142         struct cfg80211_connect_params *params;
 143         struct cfg80211_assoc_request req = {};
 144         int err;
 145
 146         ASSERT_WDEV_LOCK(wdev);
 147
 148         if (!wdev->conn)
 149                 return 0;
 150
 151         params = &wdev->conn->params;
 152
 153         switch (wdev->conn->state) {
 154         case CFG80211_CONN_SCANNING:
 155                 /* didn't find it during scan ... */
 156                 return -ENOENT;
 157         case CFG80211_CONN_SCAN_AGAIN:
 158                 return cfg80211_conn_scan(wdev);
 159         case CFG80211_CONN_AUTHENTICATE_NEXT:
 160                 BUG_ON(!rdev->ops->auth);
 161                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 162                 return cfg80211_mlme_auth(rdev, wdev->netdev,
 163                                           params->channel, params->auth_type,
 164                                           params->bssid,
 165                                           params->ssid, params->ssid_len,
 166                                           NULL, 0,
 167                                           params->key, params->key_len,
 168                                           params->key_idx, NULL, 0);
 169         case CFG80211_CONN_AUTH_FAILED:
 170                 return -ENOTCONN;
 171         case CFG80211_CONN_ASSOCIATE_NEXT:
 172                 BUG_ON(!rdev->ops->assoc);
 173                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 174                 if (wdev->conn->prev_bssid_valid)
 175                         req.prev_bssid = wdev->conn->prev_bssid;
 176                 req.ie = params->ie;
 177                 req.ie_len = params->ie_len;
 178                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 179                 req.crypto = params->crypto;
 180                 req.flags = params->flags;
 181                 req.ht_capa = params->ht_capa;
 182                 req.ht_capa_mask = params->ht_capa_mask;
 183                 req.vht_capa = params->vht_capa;
 184                 req.vht_capa_mask = params->vht_capa_mask;
 185
 186                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
 187                                           params->bssid, params->ssid,
 188                                           params->ssid_len, &req);
 189                 if (err)
 190                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 191                                              NULL, 0,
 192                                              WLAN_REASON_DEAUTH_LEAVING,
 193                                              false);
 194                 return err;
 195         case CFG80211_CONN_ASSOC_FAILED:
 196                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 197                                      NULL, 0,
 198                                      WLAN_REASON_DEAUTH_LEAVING, false);
 199                 return -ENOTCONN;
 200         case CFG80211_CONN_DEAUTH:
 201                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 202                                      NULL, 0,
 203                                      WLAN_REASON_DEAUTH_LEAVING, false);
 204                 /* free directly, disconnected event already sent */
 205                 cfg80211_sme_free(wdev);
 206                 return 0;
 207         default:
 208                 return 0;
 209         }
 210 }
 211
 212 void cfg80211_conn_work(struct work_struct *work)
 213 {
 214         struct cfg80211_registered_device *rdev =
 215                 container_of(work, struct cfg80211_registered_device, conn_work);
 216         struct wireless_dev *wdev;
 217         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 218
 219         rtnl_lock();
 220
 221         list_for_each_entry(wdev, &rdev->wdev_list, list) {
 222                 if (!wdev->netdev)
 223                         continue;
 224
 225                 wdev_lock(wdev);
 226                 if (!netif_running(wdev->netdev)) {
 227                         wdev_unlock(wdev);
 228                         continue;
 229                 }
 230                 if (!wdev->conn ||
 231                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 232                         wdev_unlock(wdev);
 233                         continue;
 234                 }
 235                 if (wdev->conn->params.bssid) {
 236                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 237                         bssid = bssid_buf;
 238                 }
 239                 if (cfg80211_conn_do_work(wdev)) {
 240                         __cfg80211_connect_result(
 241                                         wdev->netdev, bssid,
 242                                         NULL, 0, NULL, 0,
 243                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 244                                         false, NULL);
 245                         cfg80211_sme_free(wdev);
 246                 }
 247                 wdev_unlock(wdev);
 248         }
 249
 250         rtnl_unlock();
 251 }
 252
 253 /* Returned bss is reference counted and must be cleaned up appropriately. */
 254 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 255 {
 256         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 257         struct cfg80211_bss *bss;
 258         u16 capa = WLAN_CAPABILITY_ESS;
 259
 260         ASSERT_WDEV_LOCK(wdev);
 261
 262         if (wdev->conn->params.privacy)
 263                 capa |= WLAN_CAPABILITY_PRIVACY;
 264
 265         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 266                                wdev->conn->params.bssid,
 267                                wdev->conn->params.ssid,
 268                                wdev->conn->params.ssid_len,
 269                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 270                                capa);
 271         if (!bss)
 272                 return NULL;
 273
 274         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 275         wdev->conn->params.bssid = wdev->conn->bssid;
 276         wdev->conn->params.channel = bss->channel;
 277         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 278         schedule_work(&rdev->conn_work);
 279
 280         return bss;
 281 }
 282
 283 static void __cfg80211_sme_scan_done(struct net_device *dev)
 284 {
 285         struct wireless_dev *wdev = dev->ieee80211_ptr;
 286         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 287         struct cfg80211_bss *bss;
 288
 289         ASSERT_WDEV_LOCK(wdev);
 290
 291         if (!wdev->conn)
 292                 return;
 293
 294         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 295             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 296                 return;
 297
 298         bss = cfg80211_get_conn_bss(wdev);
 299         if (bss)
 300                 cfg80211_put_bss(&rdev->wiphy, bss);
 301         else
 302                 schedule_work(&rdev->conn_work);
 303 }
 304
 305 void cfg80211_sme_scan_done(struct net_device *dev)
 306 {
 307         struct wireless_dev *wdev = dev->ieee80211_ptr;
 308
 309         wdev_lock(wdev);
 310         __cfg80211_sme_scan_done(dev);
 311         wdev_unlock(wdev);
 312 }
 313
 314 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 315 {
 316         struct wiphy *wiphy = wdev->wiphy;
 317         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 318         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 319         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 320
 321         ASSERT_WDEV_LOCK(wdev);
 322
 323         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 324                 return;
 325
 326         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 327             wdev->conn->auto_auth &&
 328             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 329                 /* select automatically between only open, shared, leap */
 330                 switch (wdev->conn->params.auth_type) {
 331                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 332                         if (wdev->connect_keys)
 333                                 wdev->conn->params.auth_type =
 334                                         NL80211_AUTHTYPE_SHARED_KEY;
 335                         else
 336                                 wdev->conn->params.auth_type =
 337                                         NL80211_AUTHTYPE_NETWORK_EAP;
 338                         break;
 339                 case NL80211_AUTHTYPE_SHARED_KEY:
 340                         wdev->conn->params.auth_type =
 341                                 NL80211_AUTHTYPE_NETWORK_EAP;
 342                         break;
 343                 default:
 344                         /* huh? */
 345                         wdev->conn->params.auth_type =
 346                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 347                         break;
 348                 }
 349                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 350                 schedule_work(&rdev->conn_work);
 351         } else if (status_code != WLAN_STATUS_SUCCESS) {
 352                 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
 353                                           NULL, 0, NULL, 0,
 354                                           status_code, false, NULL);
 355         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 356                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 357                 schedule_work(&rdev->conn_work);
 358         }
 359 }
 360
 361 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 362 {
 363         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 364
 365         if (!wdev->conn)
 366                 return false;
 367
 368         if (status == WLAN_STATUS_SUCCESS) {
 369                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 370                 return false;
 371         }
 372
 373         if (wdev->conn->prev_bssid_valid) {
 374                 /*
 375                  * Some stupid APs don't accept reassoc, so we
 376                  * need to fall back to trying regular assoc;
 377                  * return true so no event is sent to userspace.
 378                  */
 379                 wdev->conn->prev_bssid_valid = false;
 380                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 381                 schedule_work(&rdev->conn_work);
 382                 return true;
 383         }
 384
 385         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 386         schedule_work(&rdev->conn_work);
 387         return false;
 388 }
 389
 390 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 391 {
 392         cfg80211_sme_free(wdev);
 393 }
 394
 395 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 396 {
 397         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 398
 399         if (!wdev->conn)
 400                 return;
 401
 402         wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
 403         schedule_work(&rdev->conn_work);
 404 }
 405
 406 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 407 {
 408         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 409
 410         if (!wdev->conn)
 411                 return;
 412
 413         wdev->conn->state = CFG80211_CONN_DEAUTH;
 414         schedule_work(&rdev->conn_work);
 415 }
 416
 417 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 418 {
 419         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 420
 421         if (!wdev->conn)
 422                 return;
 423
 424         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 425         schedule_work(&rdev->conn_work);
 426 }
 427
 428 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 429                                 struct cfg80211_connect_params *connect,
 430                                 const u8 *prev_bssid)
 431 {
 432         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 433         struct cfg80211_bss *bss;
 434         int err;
 435
 436         if (!rdev->ops->auth || !rdev->ops->assoc)
 437                 return -EOPNOTSUPP;
 438
 439         if (wdev->current_bss)
 440                 return -EALREADY;
 441
 442         if (WARN_ON(wdev->conn))
 443                 return -EINPROGRESS;
 444
 445         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 446         if (!wdev->conn)
 447                 return -ENOMEM;
 448
 449         /*
 450          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 451          */
 452         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 453         if (connect->bssid) {
 454                 wdev->conn->params.bssid = wdev->conn->bssid;
 455                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 456         }
 457
 458         if (connect->ie) {
 459                 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 460                                         GFP_KERNEL);
 461                 wdev->conn->params.ie = wdev->conn->ie;
 462                 if (!wdev->conn->ie) {
 463                         kfree(wdev->conn);
 464                         wdev->conn = NULL;
 465                         return -ENOMEM;
 466                 }
 467         }
 468
 469         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 470                 wdev->conn->auto_auth = true;
 471                 /* start with open system ... should mostly work */
 472                 wdev->conn->params.auth_type =
 473                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 474         } else {
 475                 wdev->conn->auto_auth = false;
 476         }
 477
 478         wdev->conn->params.ssid = wdev->ssid;
 479         wdev->conn->params.ssid_len = connect->ssid_len;
 480
 481         /* see if we have the bss already */
 482         bss = cfg80211_get_conn_bss(wdev);
 483
 484         if (prev_bssid) {
 485                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 486                 wdev->conn->prev_bssid_valid = true;
 487         }
 488
 489         /* we're good if we have a matching bss struct */
 490         if (bss) {
 491                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 492                 err = cfg80211_conn_do_work(wdev);
 493                 cfg80211_put_bss(wdev->wiphy, bss);
 494         } else {
 495                 /* otherwise we'll need to scan for the AP first */
 496                 err = cfg80211_conn_scan(wdev);
 497
 498                 /*
 499                  * If we can't scan right now, then we need to scan again
 500                  * after the current scan finished, since the parameters
 501                  * changed (unless we find a good AP anyway).
 502                  */
 503                 if (err == -EBUSY) {
 504                         err = 0;
 505                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 506                 }
 507         }
 508
 509         if (err)
 510                 cfg80211_sme_free(wdev);
 511
 512         return err;
 513 }
 514
 515 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 516 {
 517         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 518         int err;
 519
 520         if (!wdev->conn)
 521                 return 0;
 522
 523         if (!rdev->ops->deauth)
 524                 return -EOPNOTSUPP;
 525
 526         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 527             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 528                 err = 0;
 529                 goto out;
 530         }
 531
 532         /* wdev->conn->params.bssid must be set if > SCANNING */
 533         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 534                                    wdev->conn->params.bssid,
 535                                    NULL, 0, reason, false);
 536  out:
 537         cfg80211_sme_free(wdev);
 538         return err;
 539 }
 540
 541 /*
 542  * code shared for in-device and software SME
 543  */
 544
 545 static bool cfg80211_is_all_idle(void)
 546 {
 547         struct cfg80211_registered_device *rdev;
 548         struct wireless_dev *wdev;
 549         bool is_all_idle = true;
 550
 551         /*
 552          * All devices must be idle as otherwise if you are actively
 553          * scanning some new beacon hints could be learned and would
 554          * count as new regulatory hints.
 555          */
 556         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 557                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 558                         wdev_lock(wdev);
 559                         if (wdev->conn || wdev->current_bss)
 560                                 is_all_idle = false;
 561                         wdev_unlock(wdev);
 562                 }
 563         }
 564
 565         return is_all_idle;
 566 }
 567
 568 static void disconnect_work(struct work_struct *work)
 569 {
 570         rtnl_lock();
 571         if (cfg80211_is_all_idle())
 572                 regulatory_hint_disconnect();
 573         rtnl_unlock();
 574 }
 575
 576 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 577
 578
 579 /*
 580  * API calls for drivers implementing connect/disconnect and
 581  * SME event handling
 582  */
 583
 584 /* This method must consume bss one way or another */
 585 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 586                                const u8 *req_ie, size_t req_ie_len,
 587                                const u8 *resp_ie, size_t resp_ie_len,
 588                                u16 status, bool wextev,
 589                                struct cfg80211_bss *bss)
 590 {
 591         struct wireless_dev *wdev = dev->ieee80211_ptr;
 592         const u8 *country_ie;
 593 #ifdef CONFIG_CFG80211_WEXT
 594         union iwreq_data wrqu;
 595 #endif
 596
 597         ASSERT_WDEV_LOCK(wdev);
 598
 599         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 600                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 601                 cfg80211_put_bss(wdev->wiphy, bss);
 602                 return;
 603         }
 604
 605         nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
 606                                     bssid, req_ie, req_ie_len,
 607                                     resp_ie, resp_ie_len,
 608                                     status, GFP_KERNEL);
 609
 610 #ifdef CONFIG_CFG80211_WEXT
 611         if (wextev) {
 612                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 613                         memset(&wrqu, 0, sizeof(wrqu));
 614                         wrqu.data.length = req_ie_len;
 615                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 616                 }
 617
 618                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 619                         memset(&wrqu, 0, sizeof(wrqu));
 620                         wrqu.data.length = resp_ie_len;
 621                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 622                 }
 623
 624                 memset(&wrqu, 0, sizeof(wrqu));
 625                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 626                 if (bssid && status == WLAN_STATUS_SUCCESS) {
 627                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 628                         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 629                         wdev->wext.prev_bssid_valid = true;
 630                 }
 631                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 632         }
 633 #endif
 634
 635         if (!bss && (status == WLAN_STATUS_SUCCESS)) {
 636                 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect);
 637                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 638                                        wdev->ssid, wdev->ssid_len,
 639                                        WLAN_CAPABILITY_ESS,
 640                                        WLAN_CAPABILITY_ESS);
 641                 if (bss)
 642                         cfg80211_hold_bss(bss_from_pub(bss));
 643         }
 644
 645         if (wdev->current_bss) {
 646                 cfg80211_unhold_bss(wdev->current_bss);
 647                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 648                 wdev->current_bss = NULL;
 649         }
 650
 651         if (status != WLAN_STATUS_SUCCESS) {
 652                 kfree(wdev->connect_keys);
 653                 wdev->connect_keys = NULL;
 654                 wdev->ssid_len = 0;
 655                 if (bss) {
 656                         cfg80211_unhold_bss(bss_from_pub(bss));
 657                         cfg80211_put_bss(wdev->wiphy, bss);
 658                 }
 659                 return;
 660         }
 661
 662         if (WARN_ON(!bss))
 663                 return;
 664
 665         wdev->current_bss = bss_from_pub(bss);
 666
 667         cfg80211_upload_connect_keys(wdev);
 668
 669         rcu_read_lock();
 670         country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
 671         if (!country_ie) {
 672                 rcu_read_unlock();
 673                 return;
 674         }
 675
 676         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 677         rcu_read_unlock();
 678
 679         if (!country_ie)
 680                 return;
 681
 682         /*
 683          * ieee80211_bss_get_ie() ensures we can access:
 684          * - country_ie + 2, the start of the country ie data, and
 685          * - and country_ie[1] which is the IE length
 686          */
 687         regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
 688                                    country_ie + 2, country_ie[1]);
 689         kfree(country_ie);
 690 }
 691
 692 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 693                              const u8 *req_ie, size_t req_ie_len,
 694                              const u8 *resp_ie, size_t resp_ie_len,
 695                              u16 status, gfp_t gfp)
 696 {
 697         struct wireless_dev *wdev = dev->ieee80211_ptr;
 698         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 699         struct cfg80211_event *ev;
 700         unsigned long flags;
 701
 702         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 703         if (!ev)
 704                 return;
 705
 706         ev->type = EVENT_CONNECT_RESULT;
 707         if (bssid)
 708                 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 709         if (req_ie_len) {
 710                 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 711                 ev->cr.req_ie_len = req_ie_len;
 712                 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 713         }
 714         if (resp_ie_len) {
 715                 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 716                 ev->cr.resp_ie_len = resp_ie_len;
 717                 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 718         }
 719         ev->cr.status = status;
 720
 721         spin_lock_irqsave(&wdev->event_lock, flags);
 722         list_add_tail(&ev->list, &wdev->event_list);
 723         spin_unlock_irqrestore(&wdev->event_lock, flags);
 724         queue_work(cfg80211_wq, &rdev->event_work);
 725 }
 726 EXPORT_SYMBOL(cfg80211_connect_result);
 727
 728 /* Consumes bss object one way or another */
 729 void __cfg80211_roamed(struct wireless_dev *wdev,
 730                        struct cfg80211_bss *bss,
 731                        const u8 *req_ie, size_t req_ie_len,
 732                        const u8 *resp_ie, size_t resp_ie_len)
 733 {
 734 #ifdef CONFIG_CFG80211_WEXT
 735         union iwreq_data wrqu;
 736 #endif
 737         ASSERT_WDEV_LOCK(wdev);
 738
 739         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 740                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 741                 goto out;
 742
 743         if (WARN_ON(!wdev->current_bss))
 744                 goto out;
 745
 746         cfg80211_unhold_bss(wdev->current_bss);
 747         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 748         wdev->current_bss = NULL;
 749
 750         cfg80211_hold_bss(bss_from_pub(bss));
 751         wdev->current_bss = bss_from_pub(bss);
 752
 753         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid,
 754                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 755                             GFP_KERNEL);
 756
 757 #ifdef CONFIG_CFG80211_WEXT
 758         if (req_ie) {
 759                 memset(&wrqu, 0, sizeof(wrqu));
 760                 wrqu.data.length = req_ie_len;
 761                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 762                                     &wrqu, req_ie);
 763         }
 764
 765         if (resp_ie) {
 766                 memset(&wrqu, 0, sizeof(wrqu));
 767                 wrqu.data.length = resp_ie_len;
 768                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 769                                     &wrqu, resp_ie);
 770         }
 771
 772         memset(&wrqu, 0, sizeof(wrqu));
 773         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 774         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
 775         memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
 776         wdev->wext.prev_bssid_valid = true;
 777         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 778 #endif
 779
 780         return;
 781 out:
 782         cfg80211_put_bss(wdev->wiphy, bss);
 783 }
 784
 785 void cfg80211_roamed(struct net_device *dev,
 786                      struct ieee80211_channel *channel,
 787                      const u8 *bssid,
 788                      const u8 *req_ie, size_t req_ie_len,
 789                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 790 {
 791         struct wireless_dev *wdev = dev->ieee80211_ptr;
 792         struct cfg80211_bss *bss;
 793
 794         bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
 795                                wdev->ssid_len, WLAN_CAPABILITY_ESS,
 796                                WLAN_CAPABILITY_ESS);
 797         if (WARN_ON(!bss))
 798                 return;
 799
 800         cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
 801                             resp_ie_len, gfp);
 802 }
 803 EXPORT_SYMBOL(cfg80211_roamed);
 804
 805 /* Consumes bss object one way or another */
 806 void cfg80211_roamed_bss(struct net_device *dev,
 807                          struct cfg80211_bss *bss, const u8 *req_ie,
 808                          size_t req_ie_len, const u8 *resp_ie,
 809                          size_t resp_ie_len, gfp_t gfp)
 810 {
 811         struct wireless_dev *wdev = dev->ieee80211_ptr;
 812         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 813         struct cfg80211_event *ev;
 814         unsigned long flags;
 815
 816         if (WARN_ON(!bss))
 817                 return;
 818
 819         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 820         if (!ev) {
 821                 cfg80211_put_bss(wdev->wiphy, bss);
 822                 return;
 823         }
 824
 825         ev->type = EVENT_ROAMED;
 826         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 827         ev->rm.req_ie_len = req_ie_len;
 828         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 829         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 830         ev->rm.resp_ie_len = resp_ie_len;
 831         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 832         ev->rm.bss = bss;
 833
 834         spin_lock_irqsave(&wdev->event_lock, flags);
 835         list_add_tail(&ev->list, &wdev->event_list);
 836         spin_unlock_irqrestore(&wdev->event_lock, flags);
 837         queue_work(cfg80211_wq, &rdev->event_work);
 838 }
 839 EXPORT_SYMBOL(cfg80211_roamed_bss);
 840
 841 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 842                              size_t ie_len, u16 reason, bool from_ap)
 843 {
 844         struct wireless_dev *wdev = dev->ieee80211_ptr;
 845         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 846         int i;
 847 #ifdef CONFIG_CFG80211_WEXT
 848         union iwreq_data wrqu;
 849 #endif
 850
 851         ASSERT_WDEV_LOCK(wdev);
 852
 853         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 854                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 855                 return;
 856
 857         if (wdev->current_bss) {
 858                 cfg80211_unhold_bss(wdev->current_bss);
 859                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 860         }
 861
 862         wdev->current_bss = NULL;
 863         wdev->ssid_len = 0;
 864
 865         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 866
 867         /*
 868          * Delete all the keys ... pairwise keys can't really
 869          * exist any more anyway, but default keys might.
 870          */
 871         if (rdev->ops->del_key)
 872                 for (i = 0; i < 6; i++)
 873                         rdev_del_key(rdev, dev, i, false, NULL);
 874
 875         rdev_set_qos_map(rdev, dev, NULL);
 876
 877 #ifdef CONFIG_CFG80211_WEXT
 878         memset(&wrqu, 0, sizeof(wrqu));
 879         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 880         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 881         wdev->wext.connect.ssid_len = 0;
 882 #endif
 883
 884         schedule_work(&cfg80211_disconnect_work);
 885 }
 886
 887 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 888                            u8 *ie, size_t ie_len, gfp_t gfp)
 889 {
 890         struct wireless_dev *wdev = dev->ieee80211_ptr;
 891         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 892         struct cfg80211_event *ev;
 893         unsigned long flags;
 894
 895         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 896         if (!ev)
 897                 return;
 898
 899         ev->type = EVENT_DISCONNECTED;
 900         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 901         ev->dc.ie_len = ie_len;
 902         memcpy((void *)ev->dc.ie, ie, ie_len);
 903         ev->dc.reason = reason;
 904
 905         spin_lock_irqsave(&wdev->event_lock, flags);
 906         list_add_tail(&ev->list, &wdev->event_list);
 907         spin_unlock_irqrestore(&wdev->event_lock, flags);
 908         queue_work(cfg80211_wq, &rdev->event_work);
 909 }
 910 EXPORT_SYMBOL(cfg80211_disconnected);
 911
 912 /*
 913  * API calls for nl80211/wext compatibility code
 914  */
 915 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 916                      struct net_device *dev,
 917                      struct cfg80211_connect_params *connect,
 918                      struct cfg80211_cached_keys *connkeys,
 919                      const u8 *prev_bssid)
 920 {
 921         struct wireless_dev *wdev = dev->ieee80211_ptr;
 922         int err;
 923
 924         ASSERT_WDEV_LOCK(wdev);
 925
 926         if (WARN_ON(wdev->connect_keys)) {
 927                 kfree(wdev->connect_keys);
 928                 wdev->connect_keys = NULL;
 929         }
 930
 931         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
 932                                   rdev->wiphy.ht_capa_mod_mask);
 933
 934         if (connkeys && connkeys->def >= 0) {
 935                 int idx;
 936                 u32 cipher;
 937
 938                 idx = connkeys->def;
 939                 cipher = connkeys->params[idx].cipher;
 940                 /* If given a WEP key we may need it for shared key auth */
 941                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
 942                     cipher == WLAN_CIPHER_SUITE_WEP104) {
 943                         connect->key_idx = idx;
 944                         connect->key = connkeys->params[idx].key;
 945                         connect->key_len = connkeys->params[idx].key_len;
 946
 947                         /*
 948                          * If ciphers are not set (e.g. when going through
 949                          * iwconfig), we have to set them appropriately here.
 950                          */
 951                         if (connect->crypto.cipher_group == 0)
 952                                 connect->crypto.cipher_group = cipher;
 953
 954                         if (connect->crypto.n_ciphers_pairwise == 0) {
 955                                 connect->crypto.n_ciphers_pairwise = 1;
 956                                 connect->crypto.ciphers_pairwise[0] = cipher;
 957                         }
 958                 }
 959         }
 960
 961         wdev->connect_keys = connkeys;
 962         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 963         wdev->ssid_len = connect->ssid_len;
 964
 965         if (!rdev->ops->connect)
 966                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
 967         else
 968                 err = rdev_connect(rdev, dev, connect);
 969
 970         if (err) {
 971                 wdev->connect_keys = NULL;
 972                 wdev->ssid_len = 0;
 973                 return err;
 974         }
 975
 976         return 0;
 977 }
 978
 979 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 980                         struct net_device *dev, u16 reason, bool wextev)
 981 {
 982         struct wireless_dev *wdev = dev->ieee80211_ptr;
 983         int err = 0;
 984
 985         ASSERT_WDEV_LOCK(wdev);
 986
 987         kfree(wdev->connect_keys);
 988         wdev->connect_keys = NULL;
 989
 990         if (wdev->conn)
 991                 err = cfg80211_sme_disconnect(wdev, reason);
 992         else if (!rdev->ops->disconnect)
 993                 cfg80211_mlme_down(rdev, dev);
 994         else if (wdev->current_bss)
 995                 err = rdev_disconnect(rdev, dev, reason);
 996
 997         return err;
 998 }