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1/*
2 * SME code for cfg80211's connect emulation.
3 *
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2009 Intel Corporation. All rights reserved.
6 */
7
8#include <linux/etherdevice.h>
9#include <linux/if_arp.h>
10#include <linux/slab.h>
11#include <linux/workqueue.h>
12#include <linux/wireless.h>
13#include <net/iw_handler.h>
14#include <net/cfg80211.h>
15#include <net/rtnetlink.h>
16#include "nl80211.h"
17#include "reg.h"
18
19struct cfg80211_conn {
20 struct cfg80211_connect_params params;
21 /* these are sub-states of the _CONNECTING sme_state */
22 enum {
23 CFG80211_CONN_IDLE,
24 CFG80211_CONN_SCANNING,
25 CFG80211_CONN_SCAN_AGAIN,
26 CFG80211_CONN_AUTHENTICATE_NEXT,
27 CFG80211_CONN_AUTHENTICATING,
28 CFG80211_CONN_ASSOCIATE_NEXT,
29 CFG80211_CONN_ASSOCIATING,
30 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
31 } state;
32 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
33 u8 *ie;
34 size_t ie_len;
35 bool auto_auth, prev_bssid_valid;
36};
37
38static bool cfg80211_is_all_idle(void)
39{
40 struct cfg80211_registered_device *rdev;
41 struct wireless_dev *wdev;
42 bool is_all_idle = true;
43
44 mutex_lock(&cfg80211_mutex);
45
46 /*
47 * All devices must be idle as otherwise if you are actively
48 * scanning some new beacon hints could be learned and would
49 * count as new regulatory hints.
50 */
51 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
52 cfg80211_lock_rdev(rdev);
53 list_for_each_entry(wdev, &rdev->netdev_list, list) {
54 wdev_lock(wdev);
55 if (wdev->sme_state != CFG80211_SME_IDLE)
56 is_all_idle = false;
57 wdev_unlock(wdev);
58 }
59 cfg80211_unlock_rdev(rdev);
60 }
61
62 mutex_unlock(&cfg80211_mutex);
63
64 return is_all_idle;
65}
66
67static void disconnect_work(struct work_struct *work)
68{
69 if (!cfg80211_is_all_idle())
70 return;
71
72 regulatory_hint_disconnect();
73}
74
75static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
76
77static int cfg80211_conn_scan(struct wireless_dev *wdev)
78{
79 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
80 struct cfg80211_scan_request *request;
81 int n_channels, err;
82
83 ASSERT_RTNL();
84 ASSERT_RDEV_LOCK(rdev);
85 ASSERT_WDEV_LOCK(wdev);
86
87 if (rdev->scan_req)
88 return -EBUSY;
89
90 if (wdev->conn->params.channel) {
91 n_channels = 1;
92 } else {
93 enum ieee80211_band band;
94 n_channels = 0;
95
96 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
97 if (!wdev->wiphy->bands[band])
98 continue;
99 n_channels += wdev->wiphy->bands[band]->n_channels;
100 }
101 }
102 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
103 sizeof(request->channels[0]) * n_channels,
104 GFP_KERNEL);
105 if (!request)
106 return -ENOMEM;
107
108 if (wdev->conn->params.channel)
109 request->channels[0] = wdev->conn->params.channel;
110 else {
111 int i = 0, j;
112 enum ieee80211_band band;
113
114 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
115 if (!wdev->wiphy->bands[band])
116 continue;
117 for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
118 i++, j++)
119 request->channels[i] =
120 &wdev->wiphy->bands[band]->channels[j];
121 request->rates[band] =
122 (1 << wdev->wiphy->bands[band]->n_bitrates) - 1;
123 }
124 }
125 request->n_channels = n_channels;
126 request->ssids = (void *)&request->channels[n_channels];
127 request->n_ssids = 1;
128
129 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
130 wdev->conn->params.ssid_len);
131 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
132
133 request->dev = wdev->netdev;
134 request->wiphy = &rdev->wiphy;
135
136 rdev->scan_req = request;
137
138 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
139 if (!err) {
140 wdev->conn->state = CFG80211_CONN_SCANNING;
141 nl80211_send_scan_start(rdev, wdev->netdev);
142 dev_hold(wdev->netdev);
143 } else {
144 rdev->scan_req = NULL;
145 kfree(request);
146 }
147 return err;
148}
149
150static int cfg80211_conn_do_work(struct wireless_dev *wdev)
151{
152 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
153 struct cfg80211_connect_params *params;
154 const u8 *prev_bssid = NULL;
155 int err;
156
157 ASSERT_WDEV_LOCK(wdev);
158
159 if (!wdev->conn)
160 return 0;
161
162 params = &wdev->conn->params;
163
164 switch (wdev->conn->state) {
165 case CFG80211_CONN_SCAN_AGAIN:
166 return cfg80211_conn_scan(wdev);
167 case CFG80211_CONN_AUTHENTICATE_NEXT:
168 BUG_ON(!rdev->ops->auth);
169 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
170 return __cfg80211_mlme_auth(rdev, wdev->netdev,
171 params->channel, params->auth_type,
172 params->bssid,
173 params->ssid, params->ssid_len,
174 NULL, 0,
175 params->key, params->key_len,
176 params->key_idx, false);
177 case CFG80211_CONN_ASSOCIATE_NEXT:
178 BUG_ON(!rdev->ops->assoc);
179 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
180 if (wdev->conn->prev_bssid_valid)
181 prev_bssid = wdev->conn->prev_bssid;
182 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
183 params->channel, params->bssid,
184 prev_bssid,
185 params->ssid, params->ssid_len,
186 params->ie, params->ie_len,
187 false, ¶ms->crypto);
188 if (err)
189 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
190 NULL, 0,
191 WLAN_REASON_DEAUTH_LEAVING,
192 false);
193 return err;
194 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
195 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
196 NULL, 0,
197 WLAN_REASON_DEAUTH_LEAVING, false);
198 /* return an error so that we call __cfg80211_connect_result() */
199 return -EINVAL;
200 default:
201 return 0;
202 }
203}
204
205void cfg80211_conn_work(struct work_struct *work)
206{
207 struct cfg80211_registered_device *rdev =
208 container_of(work, struct cfg80211_registered_device, conn_work);
209 struct wireless_dev *wdev;
210 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
211
212 rtnl_lock();
213 cfg80211_lock_rdev(rdev);
214 mutex_lock(&rdev->devlist_mtx);
215
216 list_for_each_entry(wdev, &rdev->netdev_list, list) {
217 wdev_lock(wdev);
218 if (!netif_running(wdev->netdev)) {
219 wdev_unlock(wdev);
220 continue;
221 }
222 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
223 wdev_unlock(wdev);
224 continue;
225 }
226 if (wdev->conn->params.bssid) {
227 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
228 bssid = bssid_buf;
229 }
230 if (cfg80211_conn_do_work(wdev))
231 __cfg80211_connect_result(
232 wdev->netdev, bssid,
233 NULL, 0, NULL, 0,
234 WLAN_STATUS_UNSPECIFIED_FAILURE,
235 false, NULL);
236 wdev_unlock(wdev);
237 }
238
239 mutex_unlock(&rdev->devlist_mtx);
240 cfg80211_unlock_rdev(rdev);
241 rtnl_unlock();
242}
243
244static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
245{
246 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
247 struct cfg80211_bss *bss;
248 u16 capa = WLAN_CAPABILITY_ESS;
249
250 ASSERT_WDEV_LOCK(wdev);
251
252 if (wdev->conn->params.privacy)
253 capa |= WLAN_CAPABILITY_PRIVACY;
254
255 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
256 wdev->conn->params.bssid,
257 wdev->conn->params.ssid,
258 wdev->conn->params.ssid_len,
259 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
260 capa);
261 if (!bss)
262 return NULL;
263
264 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
265 wdev->conn->params.bssid = wdev->conn->bssid;
266 wdev->conn->params.channel = bss->channel;
267 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
268 schedule_work(&rdev->conn_work);
269
270 return bss;
271}
272
273static void __cfg80211_sme_scan_done(struct net_device *dev)
274{
275 struct wireless_dev *wdev = dev->ieee80211_ptr;
276 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
277 struct cfg80211_bss *bss;
278
279 ASSERT_WDEV_LOCK(wdev);
280
281 if (wdev->sme_state != CFG80211_SME_CONNECTING)
282 return;
283
284 if (!wdev->conn)
285 return;
286
287 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
288 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
289 return;
290
291 bss = cfg80211_get_conn_bss(wdev);
292 if (bss) {
293 cfg80211_put_bss(bss);
294 } else {
295 /* not found */
296 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
297 schedule_work(&rdev->conn_work);
298 else
299 __cfg80211_connect_result(
300 wdev->netdev,
301 wdev->conn->params.bssid,
302 NULL, 0, NULL, 0,
303 WLAN_STATUS_UNSPECIFIED_FAILURE,
304 false, NULL);
305 }
306}
307
308void cfg80211_sme_scan_done(struct net_device *dev)
309{
310 struct wireless_dev *wdev = dev->ieee80211_ptr;
311
312 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
313 wdev_lock(wdev);
314 __cfg80211_sme_scan_done(dev);
315 wdev_unlock(wdev);
316 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
317}
318
319void cfg80211_sme_rx_auth(struct net_device *dev,
320 const u8 *buf, size_t len)
321{
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
323 struct wiphy *wiphy = wdev->wiphy;
324 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
325 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
326 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
327
328 ASSERT_WDEV_LOCK(wdev);
329
330 /* should only RX auth frames when connecting */
331 if (wdev->sme_state != CFG80211_SME_CONNECTING)
332 return;
333
334 if (WARN_ON(!wdev->conn))
335 return;
336
337 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
338 wdev->conn->auto_auth &&
339 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
340 /* select automatically between only open, shared, leap */
341 switch (wdev->conn->params.auth_type) {
342 case NL80211_AUTHTYPE_OPEN_SYSTEM:
343 if (wdev->connect_keys)
344 wdev->conn->params.auth_type =
345 NL80211_AUTHTYPE_SHARED_KEY;
346 else
347 wdev->conn->params.auth_type =
348 NL80211_AUTHTYPE_NETWORK_EAP;
349 break;
350 case NL80211_AUTHTYPE_SHARED_KEY:
351 wdev->conn->params.auth_type =
352 NL80211_AUTHTYPE_NETWORK_EAP;
353 break;
354 default:
355 /* huh? */
356 wdev->conn->params.auth_type =
357 NL80211_AUTHTYPE_OPEN_SYSTEM;
358 break;
359 }
360 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
361 schedule_work(&rdev->conn_work);
362 } else if (status_code != WLAN_STATUS_SUCCESS) {
363 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
364 status_code, false, NULL);
365 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
366 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
367 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
368 schedule_work(&rdev->conn_work);
369 }
370}
371
372bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
373{
374 struct wiphy *wiphy = wdev->wiphy;
375 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
376
377 if (WARN_ON(!wdev->conn))
378 return false;
379
380 if (!wdev->conn->prev_bssid_valid)
381 return false;
382
383 /*
384 * Some stupid APs don't accept reassoc, so we
385 * need to fall back to trying regular assoc.
386 */
387 wdev->conn->prev_bssid_valid = false;
388 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
389 schedule_work(&rdev->conn_work);
390
391 return true;
392}
393
394void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
395{
396 struct wiphy *wiphy = wdev->wiphy;
397 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
398
399 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
400 schedule_work(&rdev->conn_work);
401}
402
403void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
404 const u8 *req_ie, size_t req_ie_len,
405 const u8 *resp_ie, size_t resp_ie_len,
406 u16 status, bool wextev,
407 struct cfg80211_bss *bss)
408{
409 struct wireless_dev *wdev = dev->ieee80211_ptr;
410 u8 *country_ie;
411#ifdef CONFIG_CFG80211_WEXT
412 union iwreq_data wrqu;
413#endif
414
415 ASSERT_WDEV_LOCK(wdev);
416
417 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
418 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
419 return;
420
421 if (wdev->sme_state != CFG80211_SME_CONNECTING)
422 return;
423
424 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
425 bssid, req_ie, req_ie_len,
426 resp_ie, resp_ie_len,
427 status, GFP_KERNEL);
428
429#ifdef CONFIG_CFG80211_WEXT
430 if (wextev) {
431 if (req_ie && status == WLAN_STATUS_SUCCESS) {
432 memset(&wrqu, 0, sizeof(wrqu));
433 wrqu.data.length = req_ie_len;
434 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
435 }
436
437 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
438 memset(&wrqu, 0, sizeof(wrqu));
439 wrqu.data.length = resp_ie_len;
440 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
441 }
442
443 memset(&wrqu, 0, sizeof(wrqu));
444 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
445 if (bssid && status == WLAN_STATUS_SUCCESS) {
446 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
447 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
448 wdev->wext.prev_bssid_valid = true;
449 }
450 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
451 }
452#endif
453
454 if (wdev->current_bss) {
455 cfg80211_unhold_bss(wdev->current_bss);
456 cfg80211_put_bss(&wdev->current_bss->pub);
457 wdev->current_bss = NULL;
458 }
459
460 if (wdev->conn)
461 wdev->conn->state = CFG80211_CONN_IDLE;
462
463 if (status != WLAN_STATUS_SUCCESS) {
464 wdev->sme_state = CFG80211_SME_IDLE;
465 if (wdev->conn)
466 kfree(wdev->conn->ie);
467 kfree(wdev->conn);
468 wdev->conn = NULL;
469 kfree(wdev->connect_keys);
470 wdev->connect_keys = NULL;
471 wdev->ssid_len = 0;
472 return;
473 }
474
475 if (!bss)
476 bss = cfg80211_get_bss(wdev->wiphy,
477 wdev->conn ? wdev->conn->params.channel :
478 NULL,
479 bssid,
480 wdev->ssid, wdev->ssid_len,
481 WLAN_CAPABILITY_ESS,
482 WLAN_CAPABILITY_ESS);
483
484 if (WARN_ON(!bss))
485 return;
486
487 cfg80211_hold_bss(bss_from_pub(bss));
488 wdev->current_bss = bss_from_pub(bss);
489
490 wdev->sme_state = CFG80211_SME_CONNECTED;
491 cfg80211_upload_connect_keys(wdev);
492
493 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
494
495 if (!country_ie)
496 return;
497
498 /*
499 * ieee80211_bss_get_ie() ensures we can access:
500 * - country_ie + 2, the start of the country ie data, and
501 * - and country_ie[1] which is the IE length
502 */
503 regulatory_hint_11d(wdev->wiphy,
504 bss->channel->band,
505 country_ie + 2,
506 country_ie[1]);
507}
508
509void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
510 const u8 *req_ie, size_t req_ie_len,
511 const u8 *resp_ie, size_t resp_ie_len,
512 u16 status, gfp_t gfp)
513{
514 struct wireless_dev *wdev = dev->ieee80211_ptr;
515 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
516 struct cfg80211_event *ev;
517 unsigned long flags;
518
519 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
520
521 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
522 if (!ev)
523 return;
524
525 ev->type = EVENT_CONNECT_RESULT;
526 if (bssid)
527 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
528 if (req_ie_len) {
529 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
530 ev->cr.req_ie_len = req_ie_len;
531 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
532 }
533 if (resp_ie_len) {
534 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
535 ev->cr.resp_ie_len = resp_ie_len;
536 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
537 }
538 ev->cr.status = status;
539
540 spin_lock_irqsave(&wdev->event_lock, flags);
541 list_add_tail(&ev->list, &wdev->event_list);
542 spin_unlock_irqrestore(&wdev->event_lock, flags);
543 queue_work(cfg80211_wq, &rdev->event_work);
544}
545EXPORT_SYMBOL(cfg80211_connect_result);
546
547void __cfg80211_roamed(struct wireless_dev *wdev,
548 struct ieee80211_channel *channel,
549 const u8 *bssid,
550 const u8 *req_ie, size_t req_ie_len,
551 const u8 *resp_ie, size_t resp_ie_len)
552{
553 struct cfg80211_bss *bss;
554#ifdef CONFIG_CFG80211_WEXT
555 union iwreq_data wrqu;
556#endif
557
558 ASSERT_WDEV_LOCK(wdev);
559
560 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
561 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
562 return;
563
564 if (wdev->sme_state != CFG80211_SME_CONNECTED)
565 return;
566
567 /* internal error -- how did we get to CONNECTED w/o BSS? */
568 if (WARN_ON(!wdev->current_bss)) {
569 return;
570 }
571
572 cfg80211_unhold_bss(wdev->current_bss);
573 cfg80211_put_bss(&wdev->current_bss->pub);
574 wdev->current_bss = NULL;
575
576 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid,
577 wdev->ssid, wdev->ssid_len,
578 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
579
580 if (WARN_ON(!bss))
581 return;
582
583 cfg80211_hold_bss(bss_from_pub(bss));
584 wdev->current_bss = bss_from_pub(bss);
585
586 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
587 req_ie, req_ie_len, resp_ie, resp_ie_len,
588 GFP_KERNEL);
589
590#ifdef CONFIG_CFG80211_WEXT
591 if (req_ie) {
592 memset(&wrqu, 0, sizeof(wrqu));
593 wrqu.data.length = req_ie_len;
594 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
595 &wrqu, req_ie);
596 }
597
598 if (resp_ie) {
599 memset(&wrqu, 0, sizeof(wrqu));
600 wrqu.data.length = resp_ie_len;
601 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
602 &wrqu, resp_ie);
603 }
604
605 memset(&wrqu, 0, sizeof(wrqu));
606 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
607 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
608 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
609 wdev->wext.prev_bssid_valid = true;
610 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
611#endif
612}
613
614void cfg80211_roamed(struct net_device *dev,
615 struct ieee80211_channel *channel,
616 const u8 *bssid,
617 const u8 *req_ie, size_t req_ie_len,
618 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
619{
620 struct wireless_dev *wdev = dev->ieee80211_ptr;
621 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
622 struct cfg80211_event *ev;
623 unsigned long flags;
624
625 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
626
627 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
628 if (!ev)
629 return;
630
631 ev->type = EVENT_ROAMED;
632 ev->rm.channel = channel;
633 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
634 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
635 ev->rm.req_ie_len = req_ie_len;
636 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
637 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
638 ev->rm.resp_ie_len = resp_ie_len;
639 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
640
641 spin_lock_irqsave(&wdev->event_lock, flags);
642 list_add_tail(&ev->list, &wdev->event_list);
643 spin_unlock_irqrestore(&wdev->event_lock, flags);
644 queue_work(cfg80211_wq, &rdev->event_work);
645}
646EXPORT_SYMBOL(cfg80211_roamed);
647
648void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
649 size_t ie_len, u16 reason, bool from_ap)
650{
651 struct wireless_dev *wdev = dev->ieee80211_ptr;
652 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
653 int i;
654#ifdef CONFIG_CFG80211_WEXT
655 union iwreq_data wrqu;
656#endif
657
658 ASSERT_WDEV_LOCK(wdev);
659
660 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
661 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
662 return;
663
664 if (wdev->sme_state != CFG80211_SME_CONNECTED)
665 return;
666
667 if (wdev->current_bss) {
668 cfg80211_unhold_bss(wdev->current_bss);
669 cfg80211_put_bss(&wdev->current_bss->pub);
670 }
671
672 wdev->current_bss = NULL;
673 wdev->sme_state = CFG80211_SME_IDLE;
674 wdev->ssid_len = 0;
675
676 if (wdev->conn) {
677 const u8 *bssid;
678 int ret;
679
680 kfree(wdev->conn->ie);
681 wdev->conn->ie = NULL;
682 kfree(wdev->conn);
683 wdev->conn = NULL;
684
685 /*
686 * If this disconnect was due to a disassoc, we
687 * we might still have an auth BSS around. For
688 * the userspace SME that's currently expected,
689 * but for the kernel SME (nl80211 CONNECT or
690 * wireless extensions) we want to clear up all
691 * state.
692 */
693 for (i = 0; i < MAX_AUTH_BSSES; i++) {
694 if (!wdev->auth_bsses[i])
695 continue;
696 bssid = wdev->auth_bsses[i]->pub.bssid;
697 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
698 WLAN_REASON_DEAUTH_LEAVING,
699 false);
700 WARN(ret, "deauth failed: %d\n", ret);
701 }
702 }
703
704 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
705
706 /*
707 * Delete all the keys ... pairwise keys can't really
708 * exist any more anyway, but default keys might.
709 */
710 if (rdev->ops->del_key)
711 for (i = 0; i < 6; i++)
712 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
713
714#ifdef CONFIG_CFG80211_WEXT
715 memset(&wrqu, 0, sizeof(wrqu));
716 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
717 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
718 wdev->wext.connect.ssid_len = 0;
719#endif
720
721 schedule_work(&cfg80211_disconnect_work);
722}
723
724void cfg80211_disconnected(struct net_device *dev, u16 reason,
725 u8 *ie, size_t ie_len, gfp_t gfp)
726{
727 struct wireless_dev *wdev = dev->ieee80211_ptr;
728 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
729 struct cfg80211_event *ev;
730 unsigned long flags;
731
732 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
733
734 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
735 if (!ev)
736 return;
737
738 ev->type = EVENT_DISCONNECTED;
739 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
740 ev->dc.ie_len = ie_len;
741 memcpy((void *)ev->dc.ie, ie, ie_len);
742 ev->dc.reason = reason;
743
744 spin_lock_irqsave(&wdev->event_lock, flags);
745 list_add_tail(&ev->list, &wdev->event_list);
746 spin_unlock_irqrestore(&wdev->event_lock, flags);
747 queue_work(cfg80211_wq, &rdev->event_work);
748}
749EXPORT_SYMBOL(cfg80211_disconnected);
750
751int __cfg80211_connect(struct cfg80211_registered_device *rdev,
752 struct net_device *dev,
753 struct cfg80211_connect_params *connect,
754 struct cfg80211_cached_keys *connkeys,
755 const u8 *prev_bssid)
756{
757 struct wireless_dev *wdev = dev->ieee80211_ptr;
758 struct cfg80211_bss *bss = NULL;
759 int err;
760
761 ASSERT_WDEV_LOCK(wdev);
762
763 if (wdev->sme_state != CFG80211_SME_IDLE)
764 return -EALREADY;
765
766 if (WARN_ON(wdev->connect_keys)) {
767 kfree(wdev->connect_keys);
768 wdev->connect_keys = NULL;
769 }
770
771 if (connkeys && connkeys->def >= 0) {
772 int idx;
773 u32 cipher;
774
775 idx = connkeys->def;
776 cipher = connkeys->params[idx].cipher;
777 /* If given a WEP key we may need it for shared key auth */
778 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
779 cipher == WLAN_CIPHER_SUITE_WEP104) {
780 connect->key_idx = idx;
781 connect->key = connkeys->params[idx].key;
782 connect->key_len = connkeys->params[idx].key_len;
783
784 /*
785 * If ciphers are not set (e.g. when going through
786 * iwconfig), we have to set them appropriately here.
787 */
788 if (connect->crypto.cipher_group == 0)
789 connect->crypto.cipher_group = cipher;
790
791 if (connect->crypto.n_ciphers_pairwise == 0) {
792 connect->crypto.n_ciphers_pairwise = 1;
793 connect->crypto.ciphers_pairwise[0] = cipher;
794 }
795 }
796 }
797
798 if (!rdev->ops->connect) {
799 if (!rdev->ops->auth || !rdev->ops->assoc)
800 return -EOPNOTSUPP;
801
802 if (WARN_ON(wdev->conn))
803 return -EINPROGRESS;
804
805 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
806 if (!wdev->conn)
807 return -ENOMEM;
808
809 /*
810 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
811 */
812 memcpy(&wdev->conn->params, connect, sizeof(*connect));
813 if (connect->bssid) {
814 wdev->conn->params.bssid = wdev->conn->bssid;
815 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
816 }
817
818 if (connect->ie) {
819 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
820 GFP_KERNEL);
821 wdev->conn->params.ie = wdev->conn->ie;
822 if (!wdev->conn->ie) {
823 kfree(wdev->conn);
824 wdev->conn = NULL;
825 return -ENOMEM;
826 }
827 }
828
829 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
830 wdev->conn->auto_auth = true;
831 /* start with open system ... should mostly work */
832 wdev->conn->params.auth_type =
833 NL80211_AUTHTYPE_OPEN_SYSTEM;
834 } else {
835 wdev->conn->auto_auth = false;
836 }
837
838 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
839 wdev->ssid_len = connect->ssid_len;
840 wdev->conn->params.ssid = wdev->ssid;
841 wdev->conn->params.ssid_len = connect->ssid_len;
842
843 /* see if we have the bss already */
844 bss = cfg80211_get_conn_bss(wdev);
845
846 wdev->sme_state = CFG80211_SME_CONNECTING;
847 wdev->connect_keys = connkeys;
848
849 if (prev_bssid) {
850 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
851 wdev->conn->prev_bssid_valid = true;
852 }
853
854 /* we're good if we have a matching bss struct */
855 if (bss) {
856 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
857 err = cfg80211_conn_do_work(wdev);
858 cfg80211_put_bss(bss);
859 } else {
860 /* otherwise we'll need to scan for the AP first */
861 err = cfg80211_conn_scan(wdev);
862 /*
863 * If we can't scan right now, then we need to scan again
864 * after the current scan finished, since the parameters
865 * changed (unless we find a good AP anyway).
866 */
867 if (err == -EBUSY) {
868 err = 0;
869 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
870 }
871 }
872 if (err) {
873 kfree(wdev->conn->ie);
874 kfree(wdev->conn);
875 wdev->conn = NULL;
876 wdev->sme_state = CFG80211_SME_IDLE;
877 wdev->connect_keys = NULL;
878 wdev->ssid_len = 0;
879 }
880
881 return err;
882 } else {
883 wdev->sme_state = CFG80211_SME_CONNECTING;
884 wdev->connect_keys = connkeys;
885 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
886 if (err) {
887 wdev->connect_keys = NULL;
888 wdev->sme_state = CFG80211_SME_IDLE;
889 return err;
890 }
891
892 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
893 wdev->ssid_len = connect->ssid_len;
894
895 return 0;
896 }
897}
898
899int cfg80211_connect(struct cfg80211_registered_device *rdev,
900 struct net_device *dev,
901 struct cfg80211_connect_params *connect,
902 struct cfg80211_cached_keys *connkeys)
903{
904 int err;
905
906 mutex_lock(&rdev->devlist_mtx);
907 wdev_lock(dev->ieee80211_ptr);
908 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
909 wdev_unlock(dev->ieee80211_ptr);
910 mutex_unlock(&rdev->devlist_mtx);
911
912 return err;
913}
914
915int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
916 struct net_device *dev, u16 reason, bool wextev)
917{
918 struct wireless_dev *wdev = dev->ieee80211_ptr;
919 int err;
920
921 ASSERT_WDEV_LOCK(wdev);
922
923 if (wdev->sme_state == CFG80211_SME_IDLE)
924 return -EINVAL;
925
926 kfree(wdev->connect_keys);
927 wdev->connect_keys = NULL;
928
929 if (!rdev->ops->disconnect) {
930 if (!rdev->ops->deauth)
931 return -EOPNOTSUPP;
932
933 /* was it connected by userspace SME? */
934 if (!wdev->conn) {
935 cfg80211_mlme_down(rdev, dev);
936 return 0;
937 }
938
939 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
940 (wdev->conn->state == CFG80211_CONN_SCANNING ||
941 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
942 wdev->sme_state = CFG80211_SME_IDLE;
943 kfree(wdev->conn->ie);
944 kfree(wdev->conn);
945 wdev->conn = NULL;
946 wdev->ssid_len = 0;
947 return 0;
948 }
949
950 /* wdev->conn->params.bssid must be set if > SCANNING */
951 err = __cfg80211_mlme_deauth(rdev, dev,
952 wdev->conn->params.bssid,
953 NULL, 0, reason, false);
954 if (err)
955 return err;
956 } else {
957 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
958 if (err)
959 return err;
960 }
961
962 if (wdev->sme_state == CFG80211_SME_CONNECTED)
963 __cfg80211_disconnected(dev, NULL, 0, 0, false);
964 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
965 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
966 WLAN_STATUS_UNSPECIFIED_FAILURE,
967 wextev, NULL);
968
969 return 0;
970}
971
972int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
973 struct net_device *dev,
974 u16 reason, bool wextev)
975{
976 int err;
977
978 wdev_lock(dev->ieee80211_ptr);
979 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
980 wdev_unlock(dev->ieee80211_ptr);
981
982 return err;
983}
984
985void cfg80211_sme_disassoc(struct net_device *dev, int idx)
986{
987 struct wireless_dev *wdev = dev->ieee80211_ptr;
988 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
989 u8 bssid[ETH_ALEN];
990
991 ASSERT_WDEV_LOCK(wdev);
992
993 if (!wdev->conn)
994 return;
995
996 if (wdev->conn->state == CFG80211_CONN_IDLE)
997 return;
998
999 /*
1000 * Ok, so the association was made by this SME -- we don't
1001 * want it any more so deauthenticate too.
1002 */
1003
1004 if (!wdev->auth_bsses[idx])
1005 return;
1006
1007 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
1008 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
1009 NULL, 0, WLAN_REASON_DEAUTH_LEAVING,
1010 false)) {
1011 /* whatever -- assume gone anyway */
1012 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
1013 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
1014 wdev->auth_bsses[idx] = NULL;
1015 }
1016}
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
29struct 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
50static 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
60static 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_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 request->channels[0] = wdev->conn->params.channel;
85 else {
86 int i = 0, j;
87 enum ieee80211_band band;
88 struct ieee80211_supported_band *bands;
89 struct ieee80211_channel *channel;
90
91 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
92 bands = wdev->wiphy->bands[band];
93 if (!bands)
94 continue;
95 for (j = 0; j < bands->n_channels; j++) {
96 channel = &bands->channels[j];
97 if (channel->flags & IEEE80211_CHAN_DISABLED)
98 continue;
99 request->channels[i++] = channel;
100 }
101 request->rates[band] = (1 << bands->n_bitrates) - 1;
102 }
103 n_channels = i;
104 }
105 request->n_channels = n_channels;
106 request->ssids = (void *)&request->channels[n_channels];
107 request->n_ssids = 1;
108
109 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
110 wdev->conn->params.ssid_len);
111 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
112
113 request->wdev = wdev;
114 request->wiphy = &rdev->wiphy;
115 request->scan_start = jiffies;
116
117 rdev->scan_req = request;
118
119 err = rdev_scan(rdev, request);
120 if (!err) {
121 wdev->conn->state = CFG80211_CONN_SCANNING;
122 nl80211_send_scan_start(rdev, wdev);
123 dev_hold(wdev->netdev);
124 } else {
125 rdev->scan_req = NULL;
126 kfree(request);
127 }
128 return err;
129}
130
131static int cfg80211_conn_do_work(struct wireless_dev *wdev)
132{
133 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
134 struct cfg80211_connect_params *params;
135 struct cfg80211_assoc_request req = {};
136 int err;
137
138 ASSERT_WDEV_LOCK(wdev);
139
140 if (!wdev->conn)
141 return 0;
142
143 params = &wdev->conn->params;
144
145 switch (wdev->conn->state) {
146 case CFG80211_CONN_SCANNING:
147 /* didn't find it during scan ... */
148 return -ENOENT;
149 case CFG80211_CONN_SCAN_AGAIN:
150 return cfg80211_conn_scan(wdev);
151 case CFG80211_CONN_AUTHENTICATE_NEXT:
152 BUG_ON(!rdev->ops->auth);
153 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
154 return cfg80211_mlme_auth(rdev, wdev->netdev,
155 params->channel, params->auth_type,
156 params->bssid,
157 params->ssid, params->ssid_len,
158 NULL, 0,
159 params->key, params->key_len,
160 params->key_idx, NULL, 0);
161 case CFG80211_CONN_AUTH_FAILED:
162 return -ENOTCONN;
163 case CFG80211_CONN_ASSOCIATE_NEXT:
164 BUG_ON(!rdev->ops->assoc);
165 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
166 if (wdev->conn->prev_bssid_valid)
167 req.prev_bssid = wdev->conn->prev_bssid;
168 req.ie = params->ie;
169 req.ie_len = params->ie_len;
170 req.use_mfp = params->mfp != NL80211_MFP_NO;
171 req.crypto = params->crypto;
172 req.flags = params->flags;
173 req.ht_capa = params->ht_capa;
174 req.ht_capa_mask = params->ht_capa_mask;
175 req.vht_capa = params->vht_capa;
176 req.vht_capa_mask = params->vht_capa_mask;
177
178 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
179 params->bssid, params->ssid,
180 params->ssid_len, &req);
181 if (err)
182 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
183 NULL, 0,
184 WLAN_REASON_DEAUTH_LEAVING,
185 false);
186 return err;
187 case CFG80211_CONN_ASSOC_FAILED:
188 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
189 NULL, 0,
190 WLAN_REASON_DEAUTH_LEAVING, false);
191 return -ENOTCONN;
192 case CFG80211_CONN_DEAUTH:
193 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
194 NULL, 0,
195 WLAN_REASON_DEAUTH_LEAVING, false);
196 /* free directly, disconnected event already sent */
197 cfg80211_sme_free(wdev);
198 return 0;
199 default:
200 return 0;
201 }
202}
203
204void cfg80211_conn_work(struct work_struct *work)
205{
206 struct cfg80211_registered_device *rdev =
207 container_of(work, struct cfg80211_registered_device, conn_work);
208 struct wireless_dev *wdev;
209 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
210
211 rtnl_lock();
212
213 list_for_each_entry(wdev, &rdev->wdev_list, list) {
214 if (!wdev->netdev)
215 continue;
216
217 wdev_lock(wdev);
218 if (!netif_running(wdev->netdev)) {
219 wdev_unlock(wdev);
220 continue;
221 }
222 if (!wdev->conn ||
223 wdev->conn->state == CFG80211_CONN_CONNECTED) {
224 wdev_unlock(wdev);
225 continue;
226 }
227 if (wdev->conn->params.bssid) {
228 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
229 bssid = bssid_buf;
230 }
231 if (cfg80211_conn_do_work(wdev)) {
232 __cfg80211_connect_result(
233 wdev->netdev, bssid,
234 NULL, 0, NULL, 0,
235 WLAN_STATUS_UNSPECIFIED_FAILURE,
236 false, NULL);
237 }
238 wdev_unlock(wdev);
239 }
240
241 rtnl_unlock();
242}
243
244/* Returned bss is reference counted and must be cleaned up appropriately. */
245static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
246{
247 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
248 struct cfg80211_bss *bss;
249 u16 capa = WLAN_CAPABILITY_ESS;
250
251 ASSERT_WDEV_LOCK(wdev);
252
253 if (wdev->conn->params.privacy)
254 capa |= WLAN_CAPABILITY_PRIVACY;
255
256 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
257 wdev->conn->params.bssid,
258 wdev->conn->params.ssid,
259 wdev->conn->params.ssid_len,
260 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
261 capa);
262 if (!bss)
263 return NULL;
264
265 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
266 wdev->conn->params.bssid = wdev->conn->bssid;
267 wdev->conn->params.channel = bss->channel;
268 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
269 schedule_work(&rdev->conn_work);
270
271 return bss;
272}
273
274static void __cfg80211_sme_scan_done(struct net_device *dev)
275{
276 struct wireless_dev *wdev = dev->ieee80211_ptr;
277 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
278 struct cfg80211_bss *bss;
279
280 ASSERT_WDEV_LOCK(wdev);
281
282 if (!wdev->conn)
283 return;
284
285 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
286 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
287 return;
288
289 bss = cfg80211_get_conn_bss(wdev);
290 if (bss)
291 cfg80211_put_bss(&rdev->wiphy, bss);
292 else
293 schedule_work(&rdev->conn_work);
294}
295
296void cfg80211_sme_scan_done(struct net_device *dev)
297{
298 struct wireless_dev *wdev = dev->ieee80211_ptr;
299
300 wdev_lock(wdev);
301 __cfg80211_sme_scan_done(dev);
302 wdev_unlock(wdev);
303}
304
305void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
306{
307 struct wiphy *wiphy = wdev->wiphy;
308 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
309 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
310 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
311
312 ASSERT_WDEV_LOCK(wdev);
313
314 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
315 return;
316
317 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
318 wdev->conn->auto_auth &&
319 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
320 /* select automatically between only open, shared, leap */
321 switch (wdev->conn->params.auth_type) {
322 case NL80211_AUTHTYPE_OPEN_SYSTEM:
323 if (wdev->connect_keys)
324 wdev->conn->params.auth_type =
325 NL80211_AUTHTYPE_SHARED_KEY;
326 else
327 wdev->conn->params.auth_type =
328 NL80211_AUTHTYPE_NETWORK_EAP;
329 break;
330 case NL80211_AUTHTYPE_SHARED_KEY:
331 wdev->conn->params.auth_type =
332 NL80211_AUTHTYPE_NETWORK_EAP;
333 break;
334 default:
335 /* huh? */
336 wdev->conn->params.auth_type =
337 NL80211_AUTHTYPE_OPEN_SYSTEM;
338 break;
339 }
340 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
341 schedule_work(&rdev->conn_work);
342 } else if (status_code != WLAN_STATUS_SUCCESS) {
343 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
344 NULL, 0, NULL, 0,
345 status_code, false, NULL);
346 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
347 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
348 schedule_work(&rdev->conn_work);
349 }
350}
351
352bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
353{
354 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
355
356 if (!wdev->conn)
357 return false;
358
359 if (status == WLAN_STATUS_SUCCESS) {
360 wdev->conn->state = CFG80211_CONN_CONNECTED;
361 return false;
362 }
363
364 if (wdev->conn->prev_bssid_valid) {
365 /*
366 * Some stupid APs don't accept reassoc, so we
367 * need to fall back to trying regular assoc;
368 * return true so no event is sent to userspace.
369 */
370 wdev->conn->prev_bssid_valid = false;
371 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
372 schedule_work(&rdev->conn_work);
373 return true;
374 }
375
376 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
377 schedule_work(&rdev->conn_work);
378 return false;
379}
380
381void cfg80211_sme_deauth(struct wireless_dev *wdev)
382{
383 cfg80211_sme_free(wdev);
384}
385
386void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
387{
388 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
389
390 if (!wdev->conn)
391 return;
392
393 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
394 schedule_work(&rdev->conn_work);
395}
396
397void cfg80211_sme_disassoc(struct wireless_dev *wdev)
398{
399 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
400
401 if (!wdev->conn)
402 return;
403
404 wdev->conn->state = CFG80211_CONN_DEAUTH;
405 schedule_work(&rdev->conn_work);
406}
407
408void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
409{
410 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
411
412 if (!wdev->conn)
413 return;
414
415 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
416 schedule_work(&rdev->conn_work);
417}
418
419static int cfg80211_sme_connect(struct wireless_dev *wdev,
420 struct cfg80211_connect_params *connect,
421 const u8 *prev_bssid)
422{
423 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
424 struct cfg80211_bss *bss;
425 int err;
426
427 if (!rdev->ops->auth || !rdev->ops->assoc)
428 return -EOPNOTSUPP;
429
430 if (wdev->current_bss)
431 return -EALREADY;
432
433 if (WARN_ON(wdev->conn))
434 return -EINPROGRESS;
435
436 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
437 if (!wdev->conn)
438 return -ENOMEM;
439
440 /*
441 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
442 */
443 memcpy(&wdev->conn->params, connect, sizeof(*connect));
444 if (connect->bssid) {
445 wdev->conn->params.bssid = wdev->conn->bssid;
446 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
447 }
448
449 if (connect->ie) {
450 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
451 GFP_KERNEL);
452 wdev->conn->params.ie = wdev->conn->ie;
453 if (!wdev->conn->ie) {
454 kfree(wdev->conn);
455 wdev->conn = NULL;
456 return -ENOMEM;
457 }
458 }
459
460 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
461 wdev->conn->auto_auth = true;
462 /* start with open system ... should mostly work */
463 wdev->conn->params.auth_type =
464 NL80211_AUTHTYPE_OPEN_SYSTEM;
465 } else {
466 wdev->conn->auto_auth = false;
467 }
468
469 wdev->conn->params.ssid = wdev->ssid;
470 wdev->conn->params.ssid_len = connect->ssid_len;
471
472 /* see if we have the bss already */
473 bss = cfg80211_get_conn_bss(wdev);
474
475 if (prev_bssid) {
476 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
477 wdev->conn->prev_bssid_valid = true;
478 }
479
480 /* we're good if we have a matching bss struct */
481 if (bss) {
482 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
483 err = cfg80211_conn_do_work(wdev);
484 cfg80211_put_bss(wdev->wiphy, bss);
485 } else {
486 /* otherwise we'll need to scan for the AP first */
487 err = cfg80211_conn_scan(wdev);
488
489 /*
490 * If we can't scan right now, then we need to scan again
491 * after the current scan finished, since the parameters
492 * changed (unless we find a good AP anyway).
493 */
494 if (err == -EBUSY) {
495 err = 0;
496 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
497 }
498 }
499
500 if (err)
501 cfg80211_sme_free(wdev);
502
503 return err;
504}
505
506static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
507{
508 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
509 int err;
510
511 if (!wdev->conn)
512 return 0;
513
514 if (!rdev->ops->deauth)
515 return -EOPNOTSUPP;
516
517 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
518 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
519 err = 0;
520 goto out;
521 }
522
523 /* wdev->conn->params.bssid must be set if > SCANNING */
524 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
525 wdev->conn->params.bssid,
526 NULL, 0, reason, false);
527 out:
528 cfg80211_sme_free(wdev);
529 return err;
530}
531
532/*
533 * code shared for in-device and software SME
534 */
535
536static bool cfg80211_is_all_idle(void)
537{
538 struct cfg80211_registered_device *rdev;
539 struct wireless_dev *wdev;
540 bool is_all_idle = true;
541
542 /*
543 * All devices must be idle as otherwise if you are actively
544 * scanning some new beacon hints could be learned and would
545 * count as new regulatory hints.
546 */
547 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
548 list_for_each_entry(wdev, &rdev->wdev_list, list) {
549 wdev_lock(wdev);
550 if (wdev->conn || wdev->current_bss)
551 is_all_idle = false;
552 wdev_unlock(wdev);
553 }
554 }
555
556 return is_all_idle;
557}
558
559static void disconnect_work(struct work_struct *work)
560{
561 rtnl_lock();
562 if (cfg80211_is_all_idle())
563 regulatory_hint_disconnect();
564 rtnl_unlock();
565}
566
567static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
568
569
570/*
571 * API calls for drivers implementing connect/disconnect and
572 * SME event handling
573 */
574
575/* This method must consume bss one way or another */
576void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
577 const u8 *req_ie, size_t req_ie_len,
578 const u8 *resp_ie, size_t resp_ie_len,
579 u16 status, bool wextev,
580 struct cfg80211_bss *bss)
581{
582 struct wireless_dev *wdev = dev->ieee80211_ptr;
583 const u8 *country_ie;
584#ifdef CONFIG_CFG80211_WEXT
585 union iwreq_data wrqu;
586#endif
587
588 ASSERT_WDEV_LOCK(wdev);
589
590 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
591 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
592 cfg80211_put_bss(wdev->wiphy, bss);
593 return;
594 }
595
596 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
597 bssid, req_ie, req_ie_len,
598 resp_ie, resp_ie_len,
599 status, GFP_KERNEL);
600
601#ifdef CONFIG_CFG80211_WEXT
602 if (wextev) {
603 if (req_ie && status == WLAN_STATUS_SUCCESS) {
604 memset(&wrqu, 0, sizeof(wrqu));
605 wrqu.data.length = req_ie_len;
606 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
607 }
608
609 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
610 memset(&wrqu, 0, sizeof(wrqu));
611 wrqu.data.length = resp_ie_len;
612 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
613 }
614
615 memset(&wrqu, 0, sizeof(wrqu));
616 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
617 if (bssid && status == WLAN_STATUS_SUCCESS) {
618 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
619 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
620 wdev->wext.prev_bssid_valid = true;
621 }
622 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
623 }
624#endif
625
626 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
627 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect);
628 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
629 wdev->ssid, wdev->ssid_len,
630 WLAN_CAPABILITY_ESS,
631 WLAN_CAPABILITY_ESS);
632 if (bss)
633 cfg80211_hold_bss(bss_from_pub(bss));
634 }
635
636 if (wdev->current_bss) {
637 cfg80211_unhold_bss(wdev->current_bss);
638 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
639 wdev->current_bss = NULL;
640 }
641
642 if (status != WLAN_STATUS_SUCCESS) {
643 kfree(wdev->connect_keys);
644 wdev->connect_keys = NULL;
645 wdev->ssid_len = 0;
646 if (bss) {
647 cfg80211_unhold_bss(bss_from_pub(bss));
648 cfg80211_put_bss(wdev->wiphy, bss);
649 }
650 cfg80211_sme_free(wdev);
651 return;
652 }
653
654 if (WARN_ON(!bss))
655 return;
656
657 wdev->current_bss = bss_from_pub(bss);
658
659 cfg80211_upload_connect_keys(wdev);
660
661 rcu_read_lock();
662 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
663 if (!country_ie) {
664 rcu_read_unlock();
665 return;
666 }
667
668 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
669 rcu_read_unlock();
670
671 if (!country_ie)
672 return;
673
674 /*
675 * ieee80211_bss_get_ie() ensures we can access:
676 * - country_ie + 2, the start of the country ie data, and
677 * - and country_ie[1] which is the IE length
678 */
679 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
680 country_ie + 2, country_ie[1]);
681 kfree(country_ie);
682}
683
684void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
685 const u8 *req_ie, size_t req_ie_len,
686 const u8 *resp_ie, size_t resp_ie_len,
687 u16 status, gfp_t gfp)
688{
689 struct wireless_dev *wdev = dev->ieee80211_ptr;
690 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
691 struct cfg80211_event *ev;
692 unsigned long flags;
693
694 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
695 if (!ev)
696 return;
697
698 ev->type = EVENT_CONNECT_RESULT;
699 if (bssid)
700 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
701 if (req_ie_len) {
702 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
703 ev->cr.req_ie_len = req_ie_len;
704 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
705 }
706 if (resp_ie_len) {
707 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
708 ev->cr.resp_ie_len = resp_ie_len;
709 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
710 }
711 ev->cr.status = status;
712
713 spin_lock_irqsave(&wdev->event_lock, flags);
714 list_add_tail(&ev->list, &wdev->event_list);
715 spin_unlock_irqrestore(&wdev->event_lock, flags);
716 queue_work(cfg80211_wq, &rdev->event_work);
717}
718EXPORT_SYMBOL(cfg80211_connect_result);
719
720/* Consumes bss object one way or another */
721void __cfg80211_roamed(struct wireless_dev *wdev,
722 struct cfg80211_bss *bss,
723 const u8 *req_ie, size_t req_ie_len,
724 const u8 *resp_ie, size_t resp_ie_len)
725{
726#ifdef CONFIG_CFG80211_WEXT
727 union iwreq_data wrqu;
728#endif
729 ASSERT_WDEV_LOCK(wdev);
730
731 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
732 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
733 goto out;
734
735 if (WARN_ON(!wdev->current_bss))
736 goto out;
737
738 cfg80211_unhold_bss(wdev->current_bss);
739 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
740 wdev->current_bss = NULL;
741
742 cfg80211_hold_bss(bss_from_pub(bss));
743 wdev->current_bss = bss_from_pub(bss);
744
745 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid,
746 req_ie, req_ie_len, resp_ie, resp_ie_len,
747 GFP_KERNEL);
748
749#ifdef CONFIG_CFG80211_WEXT
750 if (req_ie) {
751 memset(&wrqu, 0, sizeof(wrqu));
752 wrqu.data.length = req_ie_len;
753 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
754 &wrqu, req_ie);
755 }
756
757 if (resp_ie) {
758 memset(&wrqu, 0, sizeof(wrqu));
759 wrqu.data.length = resp_ie_len;
760 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
761 &wrqu, resp_ie);
762 }
763
764 memset(&wrqu, 0, sizeof(wrqu));
765 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
766 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
767 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
768 wdev->wext.prev_bssid_valid = true;
769 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
770#endif
771
772 return;
773out:
774 cfg80211_put_bss(wdev->wiphy, bss);
775}
776
777void cfg80211_roamed(struct net_device *dev,
778 struct ieee80211_channel *channel,
779 const u8 *bssid,
780 const u8 *req_ie, size_t req_ie_len,
781 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
782{
783 struct wireless_dev *wdev = dev->ieee80211_ptr;
784 struct cfg80211_bss *bss;
785
786 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
787 wdev->ssid_len, WLAN_CAPABILITY_ESS,
788 WLAN_CAPABILITY_ESS);
789 if (WARN_ON(!bss))
790 return;
791
792 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
793 resp_ie_len, gfp);
794}
795EXPORT_SYMBOL(cfg80211_roamed);
796
797/* Consumes bss object one way or another */
798void cfg80211_roamed_bss(struct net_device *dev,
799 struct cfg80211_bss *bss, const u8 *req_ie,
800 size_t req_ie_len, const u8 *resp_ie,
801 size_t resp_ie_len, gfp_t gfp)
802{
803 struct wireless_dev *wdev = dev->ieee80211_ptr;
804 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
805 struct cfg80211_event *ev;
806 unsigned long flags;
807
808 if (WARN_ON(!bss))
809 return;
810
811 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
812 if (!ev) {
813 cfg80211_put_bss(wdev->wiphy, bss);
814 return;
815 }
816
817 ev->type = EVENT_ROAMED;
818 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
819 ev->rm.req_ie_len = req_ie_len;
820 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
821 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
822 ev->rm.resp_ie_len = resp_ie_len;
823 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
824 ev->rm.bss = bss;
825
826 spin_lock_irqsave(&wdev->event_lock, flags);
827 list_add_tail(&ev->list, &wdev->event_list);
828 spin_unlock_irqrestore(&wdev->event_lock, flags);
829 queue_work(cfg80211_wq, &rdev->event_work);
830}
831EXPORT_SYMBOL(cfg80211_roamed_bss);
832
833void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
834 size_t ie_len, u16 reason, bool from_ap)
835{
836 struct wireless_dev *wdev = dev->ieee80211_ptr;
837 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
838 int i;
839#ifdef CONFIG_CFG80211_WEXT
840 union iwreq_data wrqu;
841#endif
842
843 ASSERT_WDEV_LOCK(wdev);
844
845 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
846 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
847 return;
848
849 if (wdev->current_bss) {
850 cfg80211_unhold_bss(wdev->current_bss);
851 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
852 }
853
854 wdev->current_bss = NULL;
855 wdev->ssid_len = 0;
856
857 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
858
859 /*
860 * Delete all the keys ... pairwise keys can't really
861 * exist any more anyway, but default keys might.
862 */
863 if (rdev->ops->del_key)
864 for (i = 0; i < 6; i++)
865 rdev_del_key(rdev, dev, i, false, NULL);
866
867 rdev_set_qos_map(rdev, dev, NULL);
868
869#ifdef CONFIG_CFG80211_WEXT
870 memset(&wrqu, 0, sizeof(wrqu));
871 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
872 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
873 wdev->wext.connect.ssid_len = 0;
874#endif
875
876 schedule_work(&cfg80211_disconnect_work);
877}
878
879void cfg80211_disconnected(struct net_device *dev, u16 reason,
880 u8 *ie, size_t ie_len, gfp_t gfp)
881{
882 struct wireless_dev *wdev = dev->ieee80211_ptr;
883 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
884 struct cfg80211_event *ev;
885 unsigned long flags;
886
887 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
888 if (!ev)
889 return;
890
891 ev->type = EVENT_DISCONNECTED;
892 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
893 ev->dc.ie_len = ie_len;
894 memcpy((void *)ev->dc.ie, ie, ie_len);
895 ev->dc.reason = reason;
896
897 spin_lock_irqsave(&wdev->event_lock, flags);
898 list_add_tail(&ev->list, &wdev->event_list);
899 spin_unlock_irqrestore(&wdev->event_lock, flags);
900 queue_work(cfg80211_wq, &rdev->event_work);
901}
902EXPORT_SYMBOL(cfg80211_disconnected);
903
904/*
905 * API calls for nl80211/wext compatibility code
906 */
907int cfg80211_connect(struct cfg80211_registered_device *rdev,
908 struct net_device *dev,
909 struct cfg80211_connect_params *connect,
910 struct cfg80211_cached_keys *connkeys,
911 const u8 *prev_bssid)
912{
913 struct wireless_dev *wdev = dev->ieee80211_ptr;
914 int err;
915
916 ASSERT_WDEV_LOCK(wdev);
917
918 if (WARN_ON(wdev->connect_keys)) {
919 kfree(wdev->connect_keys);
920 wdev->connect_keys = NULL;
921 }
922
923 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
924 rdev->wiphy.ht_capa_mod_mask);
925
926 if (connkeys && connkeys->def >= 0) {
927 int idx;
928 u32 cipher;
929
930 idx = connkeys->def;
931 cipher = connkeys->params[idx].cipher;
932 /* If given a WEP key we may need it for shared key auth */
933 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
934 cipher == WLAN_CIPHER_SUITE_WEP104) {
935 connect->key_idx = idx;
936 connect->key = connkeys->params[idx].key;
937 connect->key_len = connkeys->params[idx].key_len;
938
939 /*
940 * If ciphers are not set (e.g. when going through
941 * iwconfig), we have to set them appropriately here.
942 */
943 if (connect->crypto.cipher_group == 0)
944 connect->crypto.cipher_group = cipher;
945
946 if (connect->crypto.n_ciphers_pairwise == 0) {
947 connect->crypto.n_ciphers_pairwise = 1;
948 connect->crypto.ciphers_pairwise[0] = cipher;
949 }
950 }
951 }
952
953 wdev->connect_keys = connkeys;
954 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
955 wdev->ssid_len = connect->ssid_len;
956
957 if (!rdev->ops->connect)
958 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
959 else
960 err = rdev_connect(rdev, dev, connect);
961
962 if (err) {
963 wdev->connect_keys = NULL;
964 wdev->ssid_len = 0;
965 return err;
966 }
967
968 return 0;
969}
970
971int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
972 struct net_device *dev, u16 reason, bool wextev)
973{
974 struct wireless_dev *wdev = dev->ieee80211_ptr;
975 int err = 0;
976
977 ASSERT_WDEV_LOCK(wdev);
978
979 kfree(wdev->connect_keys);
980 wdev->connect_keys = NULL;
981
982 if (wdev->conn)
983 err = cfg80211_sme_disconnect(wdev, reason);
984 else if (!rdev->ops->disconnect)
985 cfg80211_mlme_down(rdev, dev);
986 else if (wdev->current_bss)
987 err = rdev_disconnect(rdev, dev, reason);
988
989 return err;
990}