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TOMOYO Linux Cross Reference
Linux/net/wireless/sme.c

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  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 (wdev->current_bss) {
636                 cfg80211_unhold_bss(wdev->current_bss);
637                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
638                 wdev->current_bss = NULL;
639         }
640 
641         if (status != WLAN_STATUS_SUCCESS) {
642                 kfree(wdev->connect_keys);
643                 wdev->connect_keys = NULL;
644                 wdev->ssid_len = 0;
645                 if (bss) {
646                         cfg80211_unhold_bss(bss_from_pub(bss));
647                         cfg80211_put_bss(wdev->wiphy, bss);
648                 }
649                 return;
650         }
651 
652         if (!bss) {
653                 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect);
654                 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
655                                        wdev->ssid, wdev->ssid_len,
656                                        WLAN_CAPABILITY_ESS,
657                                        WLAN_CAPABILITY_ESS);
658                 if (WARN_ON(!bss))
659                         return;
660                 cfg80211_hold_bss(bss_from_pub(bss));
661         }
662 
663         wdev->current_bss = bss_from_pub(bss);
664 
665         cfg80211_upload_connect_keys(wdev);
666 
667         rcu_read_lock();
668         country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
669         if (!country_ie) {
670                 rcu_read_unlock();
671                 return;
672         }
673 
674         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
675         rcu_read_unlock();
676 
677         if (!country_ie)
678                 return;
679 
680         /*
681          * ieee80211_bss_get_ie() ensures we can access:
682          * - country_ie + 2, the start of the country ie data, and
683          * - and country_ie[1] which is the IE length
684          */
685         regulatory_hint_11d(wdev->wiphy, bss->channel->band,
686                             country_ie + 2, country_ie[1]);
687         kfree(country_ie);
688 }
689 
690 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
691                              const u8 *req_ie, size_t req_ie_len,
692                              const u8 *resp_ie, size_t resp_ie_len,
693                              u16 status, gfp_t gfp)
694 {
695         struct wireless_dev *wdev = dev->ieee80211_ptr;
696         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
697         struct cfg80211_event *ev;
698         unsigned long flags;
699 
700         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
701         if (!ev)
702                 return;
703 
704         ev->type = EVENT_CONNECT_RESULT;
705         if (bssid)
706                 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
707         if (req_ie_len) {
708                 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
709                 ev->cr.req_ie_len = req_ie_len;
710                 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
711         }
712         if (resp_ie_len) {
713                 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
714                 ev->cr.resp_ie_len = resp_ie_len;
715                 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
716         }
717         ev->cr.status = status;
718 
719         spin_lock_irqsave(&wdev->event_lock, flags);
720         list_add_tail(&ev->list, &wdev->event_list);
721         spin_unlock_irqrestore(&wdev->event_lock, flags);
722         queue_work(cfg80211_wq, &rdev->event_work);
723 }
724 EXPORT_SYMBOL(cfg80211_connect_result);
725 
726 /* Consumes bss object one way or another */
727 void __cfg80211_roamed(struct wireless_dev *wdev,
728                        struct cfg80211_bss *bss,
729                        const u8 *req_ie, size_t req_ie_len,
730                        const u8 *resp_ie, size_t resp_ie_len)
731 {
732 #ifdef CONFIG_CFG80211_WEXT
733         union iwreq_data wrqu;
734 #endif
735         ASSERT_WDEV_LOCK(wdev);
736 
737         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
738                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
739                 goto out;
740 
741         if (WARN_ON(!wdev->current_bss))
742                 goto out;
743 
744         cfg80211_unhold_bss(wdev->current_bss);
745         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
746         wdev->current_bss = NULL;
747 
748         cfg80211_hold_bss(bss_from_pub(bss));
749         wdev->current_bss = bss_from_pub(bss);
750 
751         nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid,
752                             req_ie, req_ie_len, resp_ie, resp_ie_len,
753                             GFP_KERNEL);
754 
755 #ifdef CONFIG_CFG80211_WEXT
756         if (req_ie) {
757                 memset(&wrqu, 0, sizeof(wrqu));
758                 wrqu.data.length = req_ie_len;
759                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
760                                     &wrqu, req_ie);
761         }
762 
763         if (resp_ie) {
764                 memset(&wrqu, 0, sizeof(wrqu));
765                 wrqu.data.length = resp_ie_len;
766                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
767                                     &wrqu, resp_ie);
768         }
769 
770         memset(&wrqu, 0, sizeof(wrqu));
771         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
772         memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
773         memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
774         wdev->wext.prev_bssid_valid = true;
775         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
776 #endif
777 
778         return;
779 out:
780         cfg80211_put_bss(wdev->wiphy, bss);
781 }
782 
783 void cfg80211_roamed(struct net_device *dev,
784                      struct ieee80211_channel *channel,
785                      const u8 *bssid,
786                      const u8 *req_ie, size_t req_ie_len,
787                      const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
788 {
789         struct wireless_dev *wdev = dev->ieee80211_ptr;
790         struct cfg80211_bss *bss;
791 
792         bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
793                                wdev->ssid_len, WLAN_CAPABILITY_ESS,
794                                WLAN_CAPABILITY_ESS);
795         if (WARN_ON(!bss))
796                 return;
797 
798         cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
799                             resp_ie_len, gfp);
800 }
801 EXPORT_SYMBOL(cfg80211_roamed);
802 
803 /* Consumes bss object one way or another */
804 void cfg80211_roamed_bss(struct net_device *dev,
805                          struct cfg80211_bss *bss, const u8 *req_ie,
806                          size_t req_ie_len, const u8 *resp_ie,
807                          size_t resp_ie_len, gfp_t gfp)
808 {
809         struct wireless_dev *wdev = dev->ieee80211_ptr;
810         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
811         struct cfg80211_event *ev;
812         unsigned long flags;
813 
814         if (WARN_ON(!bss))
815                 return;
816 
817         ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
818         if (!ev) {
819                 cfg80211_put_bss(wdev->wiphy, bss);
820                 return;
821         }
822 
823         ev->type = EVENT_ROAMED;
824         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
825         ev->rm.req_ie_len = req_ie_len;
826         memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
827         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
828         ev->rm.resp_ie_len = resp_ie_len;
829         memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
830         ev->rm.bss = bss;
831 
832         spin_lock_irqsave(&wdev->event_lock, flags);
833         list_add_tail(&ev->list, &wdev->event_list);
834         spin_unlock_irqrestore(&wdev->event_lock, flags);
835         queue_work(cfg80211_wq, &rdev->event_work);
836 }
837 EXPORT_SYMBOL(cfg80211_roamed_bss);
838 
839 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
840                              size_t ie_len, u16 reason, bool from_ap)
841 {
842         struct wireless_dev *wdev = dev->ieee80211_ptr;
843         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
844         int i;
845 #ifdef CONFIG_CFG80211_WEXT
846         union iwreq_data wrqu;
847 #endif
848 
849         ASSERT_WDEV_LOCK(wdev);
850 
851         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
852                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
853                 return;
854 
855         if (wdev->current_bss) {
856                 cfg80211_unhold_bss(wdev->current_bss);
857                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
858         }
859 
860         wdev->current_bss = NULL;
861         wdev->ssid_len = 0;
862 
863         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
864 
865         /*
866          * Delete all the keys ... pairwise keys can't really
867          * exist any more anyway, but default keys might.
868          */
869         if (rdev->ops->del_key)
870                 for (i = 0; i < 6; i++)
871                         rdev_del_key(rdev, dev, i, false, NULL);
872 
873 #ifdef CONFIG_CFG80211_WEXT
874         memset(&wrqu, 0, sizeof(wrqu));
875         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
876         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
877         wdev->wext.connect.ssid_len = 0;
878 #endif
879 
880         schedule_work(&cfg80211_disconnect_work);
881 }
882 
883 void cfg80211_disconnected(struct net_device *dev, u16 reason,
884                            u8 *ie, size_t ie_len, gfp_t gfp)
885 {
886         struct wireless_dev *wdev = dev->ieee80211_ptr;
887         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
888         struct cfg80211_event *ev;
889         unsigned long flags;
890 
891         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
892         if (!ev)
893                 return;
894 
895         ev->type = EVENT_DISCONNECTED;
896         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
897         ev->dc.ie_len = ie_len;
898         memcpy((void *)ev->dc.ie, ie, ie_len);
899         ev->dc.reason = reason;
900 
901         spin_lock_irqsave(&wdev->event_lock, flags);
902         list_add_tail(&ev->list, &wdev->event_list);
903         spin_unlock_irqrestore(&wdev->event_lock, flags);
904         queue_work(cfg80211_wq, &rdev->event_work);
905 }
906 EXPORT_SYMBOL(cfg80211_disconnected);
907 
908 /*
909  * API calls for nl80211/wext compatibility code
910  */
911 int cfg80211_connect(struct cfg80211_registered_device *rdev,
912                      struct net_device *dev,
913                      struct cfg80211_connect_params *connect,
914                      struct cfg80211_cached_keys *connkeys,
915                      const u8 *prev_bssid)
916 {
917         struct wireless_dev *wdev = dev->ieee80211_ptr;
918         int err;
919 
920         ASSERT_WDEV_LOCK(wdev);
921 
922         if (WARN_ON(wdev->connect_keys)) {
923                 kfree(wdev->connect_keys);
924                 wdev->connect_keys = NULL;
925         }
926 
927         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
928                                   rdev->wiphy.ht_capa_mod_mask);
929 
930         if (connkeys && connkeys->def >= 0) {
931                 int idx;
932                 u32 cipher;
933 
934                 idx = connkeys->def;
935                 cipher = connkeys->params[idx].cipher;
936                 /* If given a WEP key we may need it for shared key auth */
937                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
938                     cipher == WLAN_CIPHER_SUITE_WEP104) {
939                         connect->key_idx = idx;
940                         connect->key = connkeys->params[idx].key;
941                         connect->key_len = connkeys->params[idx].key_len;
942 
943                         /*
944                          * If ciphers are not set (e.g. when going through
945                          * iwconfig), we have to set them appropriately here.
946                          */
947                         if (connect->crypto.cipher_group == 0)
948                                 connect->crypto.cipher_group = cipher;
949 
950                         if (connect->crypto.n_ciphers_pairwise == 0) {
951                                 connect->crypto.n_ciphers_pairwise = 1;
952                                 connect->crypto.ciphers_pairwise[0] = cipher;
953                         }
954                 }
955         }
956 
957         wdev->connect_keys = connkeys;
958         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
959         wdev->ssid_len = connect->ssid_len;
960 
961         if (!rdev->ops->connect)
962                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
963         else
964                 err = rdev_connect(rdev, dev, connect);
965 
966         if (err) {
967                 wdev->connect_keys = NULL;
968                 wdev->ssid_len = 0;
969                 return err;
970         }
971 
972         return 0;
973 }
974 
975 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
976                         struct net_device *dev, u16 reason, bool wextev)
977 {
978         struct wireless_dev *wdev = dev->ieee80211_ptr;
979         int err = 0;
980 
981         ASSERT_WDEV_LOCK(wdev);
982 
983         kfree(wdev->connect_keys);
984         wdev->connect_keys = NULL;
985 
986         if (wdev->conn)
987                 err = cfg80211_sme_disconnect(wdev, reason);
988         else if (!rdev->ops->disconnect)
989                 cfg80211_mlme_down(rdev, dev);
990         else if (wdev->current_bss)
991                 err = rdev_disconnect(rdev, dev, reason);
992 
993         return err;
994 }
995 

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