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_rdev(wdev->wiphy);
  63         struct cfg80211_scan_request *request;
  64         int n_channels, err;
  65
  66         ASSERT_RTNL();
  67         ASSERT_WDEV_LOCK(wdev);
  68
  69         if (rdev->scan_req || rdev->scan_msg)
  70                 return -EBUSY;
  71
  72         if (wdev->conn->params.channel)
  73                 n_channels = 1;
  74         else
  75                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  76
  77         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  78                           sizeof(request->channels[0]) * n_channels,
  79                           GFP_KERNEL);
  80         if (!request)
  81                 return -ENOMEM;
  82
  83         if (wdev->conn->params.channel) {
  84                 enum ieee80211_band band = wdev->conn->params.channel->band;
  85                 struct ieee80211_supported_band *sband =
  86                         wdev->wiphy->bands[band];
  87
  88                 if (!sband) {
  89                         kfree(request);
  90                         return -EINVAL;
  91                 }
  92                 request->channels[0] = wdev->conn->params.channel;
  93                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  94         } else {
  95                 int i = 0, j;
  96                 enum ieee80211_band band;
  97                 struct ieee80211_supported_band *bands;
  98                 struct ieee80211_channel *channel;
  99
 100                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 101                         bands = wdev->wiphy->bands[band];
 102                         if (!bands)
 103                                 continue;
 104                         for (j = 0; j < bands->n_channels; j++) {
 105                                 channel = &bands->channels[j];
 106                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 107                                         continue;
 108                                 request->channels[i++] = channel;
 109                         }
 110                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 111                 }
 112                 n_channels = i;
 113         }
 114         request->n_channels = n_channels;
 115         request->ssids = (void *)&request->channels[n_channels];
 116         request->n_ssids = 1;
 117
 118         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 119                 wdev->conn->params.ssid_len);
 120         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 121
 122         request->wdev = wdev;
 123         request->wiphy = &rdev->wiphy;
 124         request->scan_start = jiffies;
 125
 126         rdev->scan_req = request;
 127
 128         err = rdev_scan(rdev, request);
 129         if (!err) {
 130                 wdev->conn->state = CFG80211_CONN_SCANNING;
 131                 nl80211_send_scan_start(rdev, wdev);
 132                 dev_hold(wdev->netdev);
 133         } else {
 134                 rdev->scan_req = NULL;
 135                 kfree(request);
 136         }
 137         return err;
 138 }
 139
 140 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
 141 {
 142         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 143         struct cfg80211_connect_params *params;
 144         struct cfg80211_assoc_request req = {};
 145         int err;
 146
 147         ASSERT_WDEV_LOCK(wdev);
 148
 149         if (!wdev->conn)
 150                 return 0;
 151
 152         params = &wdev->conn->params;
 153
 154         switch (wdev->conn->state) {
 155         case CFG80211_CONN_SCANNING:
 156                 /* didn't find it during scan ... */
 157                 return -ENOENT;
 158         case CFG80211_CONN_SCAN_AGAIN:
 159                 return cfg80211_conn_scan(wdev);
 160         case CFG80211_CONN_AUTHENTICATE_NEXT:
 161                 if (WARN_ON(!rdev->ops->auth))
 162                         return -EOPNOTSUPP;
 163                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 164                 return cfg80211_mlme_auth(rdev, wdev->netdev,
 165                                           params->channel, params->auth_type,
 166                                           params->bssid,
 167                                           params->ssid, params->ssid_len,
 168                                           NULL, 0,
 169                                           params->key, params->key_len,
 170                                           params->key_idx, NULL, 0);
 171         case CFG80211_CONN_AUTH_FAILED:
 172                 return -ENOTCONN;
 173         case CFG80211_CONN_ASSOCIATE_NEXT:
 174                 if (WARN_ON(!rdev->ops->assoc))
 175                         return -EOPNOTSUPP;
 176                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 177                 if (wdev->conn->prev_bssid_valid)
 178                         req.prev_bssid = wdev->conn->prev_bssid;
 179                 req.ie = params->ie;
 180                 req.ie_len = params->ie_len;
 181                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 182                 req.crypto = params->crypto;
 183                 req.flags = params->flags;
 184                 req.ht_capa = params->ht_capa;
 185                 req.ht_capa_mask = params->ht_capa_mask;
 186                 req.vht_capa = params->vht_capa;
 187                 req.vht_capa_mask = params->vht_capa_mask;
 188
 189                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
 190                                           params->bssid, params->ssid,
 191                                           params->ssid_len, &req);
 192                 if (err)
 193                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 194                                              NULL, 0,
 195                                              WLAN_REASON_DEAUTH_LEAVING,
 196                                              false);
 197                 return err;
 198         case CFG80211_CONN_ASSOC_FAILED:
 199                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 200                                      NULL, 0,
 201                                      WLAN_REASON_DEAUTH_LEAVING, false);
 202                 return -ENOTCONN;
 203         case CFG80211_CONN_DEAUTH:
 204                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 205                                      NULL, 0,
 206                                      WLAN_REASON_DEAUTH_LEAVING, false);
 207                 /* free directly, disconnected event already sent */
 208                 cfg80211_sme_free(wdev);
 209                 return 0;
 210         default:
 211                 return 0;
 212         }
 213 }
 214
 215 void cfg80211_conn_work(struct work_struct *work)
 216 {
 217         struct cfg80211_registered_device *rdev =
 218                 container_of(work, struct cfg80211_registered_device, conn_work);
 219         struct wireless_dev *wdev;
 220         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 221
 222         rtnl_lock();
 223
 224         list_for_each_entry(wdev, &rdev->wdev_list, list) {
 225                 if (!wdev->netdev)
 226                         continue;
 227
 228                 wdev_lock(wdev);
 229                 if (!netif_running(wdev->netdev)) {
 230                         wdev_unlock(wdev);
 231                         continue;
 232                 }
 233                 if (!wdev->conn ||
 234                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 235                         wdev_unlock(wdev);
 236                         continue;
 237                 }
 238                 if (wdev->conn->params.bssid) {
 239                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 240                         bssid = bssid_buf;
 241                 }
 242                 if (cfg80211_conn_do_work(wdev)) {
 243                         __cfg80211_connect_result(
 244                                         wdev->netdev, bssid,
 245                                         NULL, 0, NULL, 0,
 246                                         WLAN_STATUS_UNSPECIFIED_FAILURE,
 247                                         false, NULL);
 248                 }
 249                 wdev_unlock(wdev);
 250         }
 251
 252         rtnl_unlock();
 253 }
 254
 255 /* Returned bss is reference counted and must be cleaned up appropriately. */
 256 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 257 {
 258         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 259         struct cfg80211_bss *bss;
 260         u16 capa = WLAN_CAPABILITY_ESS;
 261
 262         ASSERT_WDEV_LOCK(wdev);
 263
 264         if (wdev->conn->params.privacy)
 265                 capa |= WLAN_CAPABILITY_PRIVACY;
 266
 267         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 268                                wdev->conn->params.bssid,
 269                                wdev->conn->params.ssid,
 270                                wdev->conn->params.ssid_len,
 271                                WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
 272                                capa);
 273         if (!bss)
 274                 return NULL;
 275
 276         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 277         wdev->conn->params.bssid = wdev->conn->bssid;
 278         wdev->conn->params.channel = bss->channel;
 279         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 280         schedule_work(&rdev->conn_work);
 281
 282         return bss;
 283 }
 284
 285 static void __cfg80211_sme_scan_done(struct net_device *dev)
 286 {
 287         struct wireless_dev *wdev = dev->ieee80211_ptr;
 288         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 289         struct cfg80211_bss *bss;
 290
 291         ASSERT_WDEV_LOCK(wdev);
 292
 293         if (!wdev->conn)
 294                 return;
 295
 296         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 297             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 298                 return;
 299
 300         bss = cfg80211_get_conn_bss(wdev);
 301         if (bss)
 302                 cfg80211_put_bss(&rdev->wiphy, bss);
 303         else
 304                 schedule_work(&rdev->conn_work);
 305 }
 306
 307 void cfg80211_sme_scan_done(struct net_device *dev)
 308 {
 309         struct wireless_dev *wdev = dev->ieee80211_ptr;
 310
 311         wdev_lock(wdev);
 312         __cfg80211_sme_scan_done(dev);
 313         wdev_unlock(wdev);
 314 }
 315
 316 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 317 {
 318         struct wiphy *wiphy = wdev->wiphy;
 319         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 320         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 321         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 322
 323         ASSERT_WDEV_LOCK(wdev);
 324
 325         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 326                 return;
 327
 328         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 329             wdev->conn->auto_auth &&
 330             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 331                 /* select automatically between only open, shared, leap */
 332                 switch (wdev->conn->params.auth_type) {
 333                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 334                         if (wdev->connect_keys)
 335                                 wdev->conn->params.auth_type =
 336                                         NL80211_AUTHTYPE_SHARED_KEY;
 337                         else
 338                                 wdev->conn->params.auth_type =
 339                                         NL80211_AUTHTYPE_NETWORK_EAP;
 340                         break;
 341                 case NL80211_AUTHTYPE_SHARED_KEY:
 342                         wdev->conn->params.auth_type =
 343                                 NL80211_AUTHTYPE_NETWORK_EAP;
 344                         break;
 345                 default:
 346                         /* huh? */
 347                         wdev->conn->params.auth_type =
 348                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 349                         break;
 350                 }
 351                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 352                 schedule_work(&rdev->conn_work);
 353         } else if (status_code != WLAN_STATUS_SUCCESS) {
 354                 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
 355                                           NULL, 0, NULL, 0,
 356                                           status_code, false, NULL);
 357         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 358                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 359                 schedule_work(&rdev->conn_work);
 360         }
 361 }
 362
 363 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 364 {
 365         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 366
 367         if (!wdev->conn)
 368                 return false;
 369
 370         if (status == WLAN_STATUS_SUCCESS) {
 371                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 372                 return false;
 373         }
 374
 375         if (wdev->conn->prev_bssid_valid) {
 376                 /*
 377                  * Some stupid APs don't accept reassoc, so we
 378                  * need to fall back to trying regular assoc;
 379                  * return true so no event is sent to userspace.
 380                  */
 381                 wdev->conn->prev_bssid_valid = false;
 382                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 383                 schedule_work(&rdev->conn_work);
 384                 return true;
 385         }
 386
 387         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 388         schedule_work(&rdev->conn_work);
 389         return false;
 390 }
 391
 392 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 393 {
 394         cfg80211_sme_free(wdev);
 395 }
 396
 397 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 398 {
 399         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 400
 401         if (!wdev->conn)
 402                 return;
 403
 404         wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
 405         schedule_work(&rdev->conn_work);
 406 }
 407
 408 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 409 {
 410         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 411
 412         if (!wdev->conn)
 413                 return;
 414
 415         wdev->conn->state = CFG80211_CONN_DEAUTH;
 416         schedule_work(&rdev->conn_work);
 417 }
 418
 419 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 420 {
 421         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 422
 423         if (!wdev->conn)
 424                 return;
 425
 426         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 427         schedule_work(&rdev->conn_work);
 428 }
 429
 430 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 431                                 struct cfg80211_connect_params *connect,
 432                                 const u8 *prev_bssid)
 433 {
 434         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 435         struct cfg80211_bss *bss;
 436         int err;
 437
 438         if (!rdev->ops->auth || !rdev->ops->assoc)
 439                 return -EOPNOTSUPP;
 440
 441         if (wdev->current_bss)
 442                 return -EALREADY;
 443
 444         if (WARN_ON(wdev->conn))
 445                 return -EINPROGRESS;
 446
 447         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 448         if (!wdev->conn)
 449                 return -ENOMEM;
 450
 451         /*
 452          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 453          */
 454         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 455         if (connect->bssid) {
 456                 wdev->conn->params.bssid = wdev->conn->bssid;
 457                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 458         }
 459
 460         if (connect->ie) {
 461                 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
 462                                         GFP_KERNEL);
 463                 wdev->conn->params.ie = wdev->conn->ie;
 464                 if (!wdev->conn->ie) {
 465                         kfree(wdev->conn);
 466                         wdev->conn = NULL;
 467                         return -ENOMEM;
 468                 }
 469         }
 470
 471         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 472                 wdev->conn->auto_auth = true;
 473                 /* start with open system ... should mostly work */
 474                 wdev->conn->params.auth_type =
 475                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 476         } else {
 477                 wdev->conn->auto_auth = false;
 478         }
 479
 480         wdev->conn->params.ssid = wdev->ssid;
 481         wdev->conn->params.ssid_len = wdev->ssid_len;
 482
 483         /* see if we have the bss already */
 484         bss = cfg80211_get_conn_bss(wdev);
 485
 486         if (prev_bssid) {
 487                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 488                 wdev->conn->prev_bssid_valid = true;
 489         }
 490
 491         /* we're good if we have a matching bss struct */
 492         if (bss) {
 493                 err = cfg80211_conn_do_work(wdev);
 494                 cfg80211_put_bss(wdev->wiphy, bss);
 495         } else {
 496                 /* otherwise we'll need to scan for the AP first */
 497                 err = cfg80211_conn_scan(wdev);
 498
 499                 /*
 500                  * If we can't scan right now, then we need to scan again
 501                  * after the current scan finished, since the parameters
 502                  * changed (unless we find a good AP anyway).
 503                  */
 504                 if (err == -EBUSY) {
 505                         err = 0;
 506                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 507                 }
 508         }
 509
 510         if (err)
 511                 cfg80211_sme_free(wdev);
 512
 513         return err;
 514 }
 515
 516 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 517 {
 518         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 519         int err;
 520
 521         if (!wdev->conn)
 522                 return 0;
 523
 524         if (!rdev->ops->deauth)
 525                 return -EOPNOTSUPP;
 526
 527         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 528             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 529                 err = 0;
 530                 goto out;
 531         }
 532
 533         /* wdev->conn->params.bssid must be set if > SCANNING */
 534         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 535                                    wdev->conn->params.bssid,
 536                                    NULL, 0, reason, false);
 537  out:
 538         cfg80211_sme_free(wdev);
 539         return err;
 540 }
 541
 542 /*
 543  * code shared for in-device and software SME
 544  */
 545
 546 static bool cfg80211_is_all_idle(void)
 547 {
 548         struct cfg80211_registered_device *rdev;
 549         struct wireless_dev *wdev;
 550         bool is_all_idle = true;
 551
 552         /*
 553          * All devices must be idle as otherwise if you are actively
 554          * scanning some new beacon hints could be learned and would
 555          * count as new regulatory hints.
 556          */
 557         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 558                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 559                         wdev_lock(wdev);
 560                         if (wdev->conn || wdev->current_bss)
 561                                 is_all_idle = false;
 562                         wdev_unlock(wdev);
 563                 }
 564         }
 565
 566         return is_all_idle;
 567 }
 568
 569 static void disconnect_work(struct work_struct *work)
 570 {
 571         rtnl_lock();
 572         if (cfg80211_is_all_idle())
 573                 regulatory_hint_disconnect();
 574         rtnl_unlock();
 575 }
 576
 577 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 578
 579
 580 /*
 581  * API calls for drivers implementing connect/disconnect and
 582  * SME event handling
 583  */
 584
 585 /* This method must consume bss one way or another */
 586 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 587                                const u8 *req_ie, size_t req_ie_len,
 588                                const u8 *resp_ie, size_t resp_ie_len,
 589                                u16 status, bool wextev,
 590                                struct cfg80211_bss *bss)
 591 {
 592         struct wireless_dev *wdev = dev->ieee80211_ptr;
 593         const u8 *country_ie;
 594 #ifdef CONFIG_CFG80211_WEXT
 595         union iwreq_data wrqu;
 596 #endif
 597
 598         ASSERT_WDEV_LOCK(wdev);
 599
 600         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 601                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 602                 cfg80211_put_bss(wdev->wiphy, bss);
 603                 return;
 604         }
 605
 606         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
 607                                     bssid, req_ie, req_ie_len,
 608                                     resp_ie, resp_ie_len,
 609                                     status, GFP_KERNEL);
 610
 611 #ifdef CONFIG_CFG80211_WEXT
 612         if (wextev) {
 613                 if (req_ie && status == WLAN_STATUS_SUCCESS) {
 614                         memset(&wrqu, 0, sizeof(wrqu));
 615                         wrqu.data.length = req_ie_len;
 616                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
 617                 }
 618
 619                 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
 620                         memset(&wrqu, 0, sizeof(wrqu));
 621                         wrqu.data.length = resp_ie_len;
 622                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
 623                 }
 624
 625                 memset(&wrqu, 0, sizeof(wrqu));
 626                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 627                 if (bssid && status == WLAN_STATUS_SUCCESS) {
 628                         memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
 629                         memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
 630                         wdev->wext.prev_bssid_valid = true;
 631                 }
 632                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 633         }
 634 #endif
 635
 636         if (!bss && (status == WLAN_STATUS_SUCCESS)) {
 637                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 638                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
 639                                        wdev->ssid, wdev->ssid_len,
 640                                        WLAN_CAPABILITY_ESS,
 641                                        WLAN_CAPABILITY_ESS);
 642                 if (bss)
 643                         cfg80211_hold_bss(bss_from_pub(bss));
 644         }
 645
 646         if (wdev->current_bss) {
 647                 cfg80211_unhold_bss(wdev->current_bss);
 648                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 649                 wdev->current_bss = NULL;
 650         }
 651
 652         if (status != WLAN_STATUS_SUCCESS) {
 653                 kzfree(wdev->connect_keys);
 654                 wdev->connect_keys = NULL;
 655                 wdev->ssid_len = 0;
 656                 if (bss) {
 657                         cfg80211_unhold_bss(bss_from_pub(bss));
 658                         cfg80211_put_bss(wdev->wiphy, bss);
 659                 }
 660                 cfg80211_sme_free(wdev);
 661                 return;
 662         }
 663
 664         if (WARN_ON(!bss))
 665                 return;
 666
 667         wdev->current_bss = bss_from_pub(bss);
 668
 669         cfg80211_upload_connect_keys(wdev);
 670
 671         rcu_read_lock();
 672         country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
 673         if (!country_ie) {
 674                 rcu_read_unlock();
 675                 return;
 676         }
 677
 678         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 679         rcu_read_unlock();
 680
 681         if (!country_ie)
 682                 return;
 683
 684         /*
 685          * ieee80211_bss_get_ie() ensures we can access:
 686          * - country_ie + 2, the start of the country ie data, and
 687          * - and country_ie[1] which is the IE length
 688          */
 689         regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
 690                                    country_ie + 2, country_ie[1]);
 691         kfree(country_ie);
 692 }
 693
 694 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 695                              const u8 *req_ie, size_t req_ie_len,
 696                              const u8 *resp_ie, size_t resp_ie_len,
 697                              u16 status, gfp_t gfp)
 698 {
 699         struct wireless_dev *wdev = dev->ieee80211_ptr;
 700         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 701         struct cfg80211_event *ev;
 702         unsigned long flags;
 703
 704         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 705         if (!ev)
 706                 return;
 707
 708         ev->type = EVENT_CONNECT_RESULT;
 709         if (bssid)
 710                 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
 711         if (req_ie_len) {
 712                 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
 713                 ev->cr.req_ie_len = req_ie_len;
 714                 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
 715         }
 716         if (resp_ie_len) {
 717                 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 718                 ev->cr.resp_ie_len = resp_ie_len;
 719                 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
 720         }
 721         ev->cr.status = status;
 722
 723         spin_lock_irqsave(&wdev->event_lock, flags);
 724         list_add_tail(&ev->list, &wdev->event_list);
 725         spin_unlock_irqrestore(&wdev->event_lock, flags);
 726         queue_work(cfg80211_wq, &rdev->event_work);
 727 }
 728 EXPORT_SYMBOL(cfg80211_connect_result);
 729
 730 /* Consumes bss object one way or another */
 731 void __cfg80211_roamed(struct wireless_dev *wdev,
 732                        struct cfg80211_bss *bss,
 733                        const u8 *req_ie, size_t req_ie_len,
 734                        const u8 *resp_ie, size_t resp_ie_len)
 735 {
 736 #ifdef CONFIG_CFG80211_WEXT
 737         union iwreq_data wrqu;
 738 #endif
 739         ASSERT_WDEV_LOCK(wdev);
 740
 741         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 742                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 743                 goto out;
 744
 745         if (WARN_ON(!wdev->current_bss))
 746                 goto out;
 747
 748         cfg80211_unhold_bss(wdev->current_bss);
 749         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 750         wdev->current_bss = NULL;
 751
 752         cfg80211_hold_bss(bss_from_pub(bss));
 753         wdev->current_bss = bss_from_pub(bss);
 754
 755         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 756                             wdev->netdev, bss->bssid,
 757                             req_ie, req_ie_len, resp_ie, resp_ie_len,
 758                             GFP_KERNEL);
 759
 760 #ifdef CONFIG_CFG80211_WEXT
 761         if (req_ie) {
 762                 memset(&wrqu, 0, sizeof(wrqu));
 763                 wrqu.data.length = req_ie_len;
 764                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 765                                     &wrqu, req_ie);
 766         }
 767
 768         if (resp_ie) {
 769                 memset(&wrqu, 0, sizeof(wrqu));
 770                 wrqu.data.length = resp_ie_len;
 771                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 772                                     &wrqu, resp_ie);
 773         }
 774
 775         memset(&wrqu, 0, sizeof(wrqu));
 776         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 777         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
 778         memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
 779         wdev->wext.prev_bssid_valid = true;
 780         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 781 #endif
 782
 783         return;
 784 out:
 785         cfg80211_put_bss(wdev->wiphy, bss);
 786 }
 787
 788 void cfg80211_roamed(struct net_device *dev,
 789                      struct ieee80211_channel *channel,
 790                      const u8 *bssid,
 791                      const u8 *req_ie, size_t req_ie_len,
 792                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
 793 {
 794         struct wireless_dev *wdev = dev->ieee80211_ptr;
 795         struct cfg80211_bss *bss;
 796
 797         bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
 798                                wdev->ssid_len, WLAN_CAPABILITY_ESS,
 799                                WLAN_CAPABILITY_ESS);
 800         if (WARN_ON(!bss))
 801                 return;
 802
 803         cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
 804                             resp_ie_len, gfp);
 805 }
 806 EXPORT_SYMBOL(cfg80211_roamed);
 807
 808 /* Consumes bss object one way or another */
 809 void cfg80211_roamed_bss(struct net_device *dev,
 810                          struct cfg80211_bss *bss, const u8 *req_ie,
 811                          size_t req_ie_len, const u8 *resp_ie,
 812                          size_t resp_ie_len, gfp_t gfp)
 813 {
 814         struct wireless_dev *wdev = dev->ieee80211_ptr;
 815         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 816         struct cfg80211_event *ev;
 817         unsigned long flags;
 818
 819         if (WARN_ON(!bss))
 820                 return;
 821
 822         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
 823         if (!ev) {
 824                 cfg80211_put_bss(wdev->wiphy, bss);
 825                 return;
 826         }
 827
 828         ev->type = EVENT_ROAMED;
 829         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 830         ev->rm.req_ie_len = req_ie_len;
 831         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
 832         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
 833         ev->rm.resp_ie_len = resp_ie_len;
 834         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
 835         ev->rm.bss = bss;
 836
 837         spin_lock_irqsave(&wdev->event_lock, flags);
 838         list_add_tail(&ev->list, &wdev->event_list);
 839         spin_unlock_irqrestore(&wdev->event_lock, flags);
 840         queue_work(cfg80211_wq, &rdev->event_work);
 841 }
 842 EXPORT_SYMBOL(cfg80211_roamed_bss);
 843
 844 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 845                              size_t ie_len, u16 reason, bool from_ap)
 846 {
 847         struct wireless_dev *wdev = dev->ieee80211_ptr;
 848         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 849         int i;
 850 #ifdef CONFIG_CFG80211_WEXT
 851         union iwreq_data wrqu;
 852 #endif
 853
 854         ASSERT_WDEV_LOCK(wdev);
 855
 856         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 857                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 858                 return;
 859
 860         if (wdev->current_bss) {
 861                 cfg80211_unhold_bss(wdev->current_bss);
 862                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 863         }
 864
 865         wdev->current_bss = NULL;
 866         wdev->ssid_len = 0;
 867
 868         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
 869
 870         /*
 871          * Delete all the keys ... pairwise keys can't really
 872          * exist any more anyway, but default keys might.
 873          */
 874         if (rdev->ops->del_key)
 875                 for (i = 0; i < 6; i++)
 876                         rdev_del_key(rdev, dev, i, false, NULL);
 877
 878         rdev_set_qos_map(rdev, dev, NULL);
 879
 880 #ifdef CONFIG_CFG80211_WEXT
 881         memset(&wrqu, 0, sizeof(wrqu));
 882         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 883         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 884         wdev->wext.connect.ssid_len = 0;
 885 #endif
 886
 887         schedule_work(&cfg80211_disconnect_work);
 888 }
 889
 890 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 891                            const u8 *ie, size_t ie_len, gfp_t gfp)
 892 {
 893         struct wireless_dev *wdev = dev->ieee80211_ptr;
 894         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 895         struct cfg80211_event *ev;
 896         unsigned long flags;
 897
 898         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
 899         if (!ev)
 900                 return;
 901
 902         ev->type = EVENT_DISCONNECTED;
 903         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
 904         ev->dc.ie_len = ie_len;
 905         memcpy((void *)ev->dc.ie, ie, ie_len);
 906         ev->dc.reason = reason;
 907
 908         spin_lock_irqsave(&wdev->event_lock, flags);
 909         list_add_tail(&ev->list, &wdev->event_list);
 910         spin_unlock_irqrestore(&wdev->event_lock, flags);
 911         queue_work(cfg80211_wq, &rdev->event_work);
 912 }
 913 EXPORT_SYMBOL(cfg80211_disconnected);
 914
 915 /*
 916  * API calls for nl80211/wext compatibility code
 917  */
 918 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 919                      struct net_device *dev,
 920                      struct cfg80211_connect_params *connect,
 921                      struct cfg80211_cached_keys *connkeys,
 922                      const u8 *prev_bssid)
 923 {
 924         struct wireless_dev *wdev = dev->ieee80211_ptr;
 925         int err;
 926
 927         ASSERT_WDEV_LOCK(wdev);
 928
 929         if (WARN_ON(wdev->connect_keys)) {
 930                 kzfree(wdev->connect_keys);
 931                 wdev->connect_keys = NULL;
 932         }
 933
 934         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
 935                                   rdev->wiphy.ht_capa_mod_mask);
 936
 937         if (connkeys && connkeys->def >= 0) {
 938                 int idx;
 939                 u32 cipher;
 940
 941                 idx = connkeys->def;
 942                 cipher = connkeys->params[idx].cipher;
 943                 /* If given a WEP key we may need it for shared key auth */
 944                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
 945                     cipher == WLAN_CIPHER_SUITE_WEP104) {
 946                         connect->key_idx = idx;
 947                         connect->key = connkeys->params[idx].key;
 948                         connect->key_len = connkeys->params[idx].key_len;
 949
 950                         /*
 951                          * If ciphers are not set (e.g. when going through
 952                          * iwconfig), we have to set them appropriately here.
 953                          */
 954                         if (connect->crypto.cipher_group == 0)
 955                                 connect->crypto.cipher_group = cipher;
 956
 957                         if (connect->crypto.n_ciphers_pairwise == 0) {
 958                                 connect->crypto.n_ciphers_pairwise = 1;
 959                                 connect->crypto.ciphers_pairwise[0] = cipher;
 960                         }
 961                 }
 962         }
 963
 964         wdev->connect_keys = connkeys;
 965         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
 966         wdev->ssid_len = connect->ssid_len;
 967
 968         if (!rdev->ops->connect)
 969                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
 970         else
 971                 err = rdev_connect(rdev, dev, connect);
 972
 973         if (err) {
 974                 wdev->connect_keys = NULL;
 975                 wdev->ssid_len = 0;
 976                 return err;
 977         }
 978
 979         return 0;
 980 }
 981
 982 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 983                         struct net_device *dev, u16 reason, bool wextev)
 984 {
 985         struct wireless_dev *wdev = dev->ieee80211_ptr;
 986         int err = 0;
 987
 988         ASSERT_WDEV_LOCK(wdev);
 989
 990         kzfree(wdev->connect_keys);
 991         wdev->connect_keys = NULL;
 992
 993         if (wdev->conn)
 994                 err = cfg80211_sme_disconnect(wdev, reason);
 995         else if (!rdev->ops->disconnect)
 996                 cfg80211_mlme_down(rdev, dev);
 997         else if (wdev->current_bss)
 998                 err = rdev_disconnect(rdev, dev, reason);
 999
1000         return err;
1001 }