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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// SPDX-License-Identifier: GPL-2.0
2/*
3 * SME code for cfg80211
4 * both driver SME event handling and the SME implementation
5 * (for nl80211's connect() and wext)
6 *
7 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2009, 2020, 2022-2023 Intel Corporation. All rights reserved.
9 * Copyright 2017 Intel Deutschland GmbH
10 */
11
12#include <linux/etherdevice.h>
13#include <linux/if_arp.h>
14#include <linux/slab.h>
15#include <linux/workqueue.h>
16#include <linux/wireless.h>
17#include <linux/export.h>
18#include <net/iw_handler.h>
19#include <net/cfg80211.h>
20#include <net/rtnetlink.h>
21#include "nl80211.h"
22#include "reg.h"
23#include "rdev-ops.h"
24
25/*
26 * Software SME in cfg80211, using auth/assoc/deauth calls to the
27 * driver. This is for implementing nl80211's connect/disconnect
28 * and wireless extensions (if configured.)
29 */
30
31struct cfg80211_conn {
32 struct cfg80211_connect_params params;
33 /* these are sub-states of the _CONNECTING sme_state */
34 enum {
35 CFG80211_CONN_SCANNING,
36 CFG80211_CONN_SCAN_AGAIN,
37 CFG80211_CONN_AUTHENTICATE_NEXT,
38 CFG80211_CONN_AUTHENTICATING,
39 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
40 CFG80211_CONN_ASSOCIATE_NEXT,
41 CFG80211_CONN_ASSOCIATING,
42 CFG80211_CONN_ASSOC_FAILED,
43 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
44 CFG80211_CONN_DEAUTH,
45 CFG80211_CONN_ABANDON,
46 CFG80211_CONN_CONNECTED,
47 } state;
48 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
49 const u8 *ie;
50 size_t ie_len;
51 bool auto_auth, prev_bssid_valid;
52};
53
54static void cfg80211_sme_free(struct wireless_dev *wdev)
55{
56 if (!wdev->conn)
57 return;
58
59 kfree(wdev->conn->ie);
60 kfree(wdev->conn);
61 wdev->conn = NULL;
62}
63
64static int cfg80211_conn_scan(struct wireless_dev *wdev)
65{
66 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
67 struct cfg80211_scan_request *request;
68 int n_channels, err;
69
70 lockdep_assert_wiphy(wdev->wiphy);
71
72 if (rdev->scan_req || rdev->scan_msg)
73 return -EBUSY;
74
75 if (wdev->conn->params.channel)
76 n_channels = 1;
77 else
78 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
79
80 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
81 sizeof(request->channels[0]) * n_channels,
82 GFP_KERNEL);
83 if (!request)
84 return -ENOMEM;
85
86 if (wdev->conn->params.channel) {
87 enum nl80211_band band = wdev->conn->params.channel->band;
88 struct ieee80211_supported_band *sband =
89 wdev->wiphy->bands[band];
90
91 if (!sband) {
92 kfree(request);
93 return -EINVAL;
94 }
95 request->channels[0] = wdev->conn->params.channel;
96 request->rates[band] = (1 << sband->n_bitrates) - 1;
97 } else {
98 int i = 0, j;
99 enum nl80211_band band;
100 struct ieee80211_supported_band *bands;
101 struct ieee80211_channel *channel;
102
103 for (band = 0; band < NUM_NL80211_BANDS; band++) {
104 bands = wdev->wiphy->bands[band];
105 if (!bands)
106 continue;
107 for (j = 0; j < bands->n_channels; j++) {
108 channel = &bands->channels[j];
109 if (channel->flags & IEEE80211_CHAN_DISABLED)
110 continue;
111 request->channels[i++] = channel;
112 }
113 request->rates[band] = (1 << bands->n_bitrates) - 1;
114 }
115 n_channels = i;
116 }
117 request->n_channels = n_channels;
118 request->ssids = (void *)&request->channels[n_channels];
119 request->n_ssids = 1;
120
121 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
122 wdev->conn->params.ssid_len);
123 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
124
125 eth_broadcast_addr(request->bssid);
126
127 request->wdev = wdev;
128 request->wiphy = &rdev->wiphy;
129 request->scan_start = jiffies;
130
131 rdev->scan_req = request;
132
133 err = rdev_scan(rdev, request);
134 if (!err) {
135 wdev->conn->state = CFG80211_CONN_SCANNING;
136 nl80211_send_scan_start(rdev, wdev);
137 dev_hold(wdev->netdev);
138 } else {
139 rdev->scan_req = NULL;
140 kfree(request);
141 }
142 return err;
143}
144
145static int cfg80211_conn_do_work(struct wireless_dev *wdev,
146 enum nl80211_timeout_reason *treason)
147{
148 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
149 struct cfg80211_connect_params *params;
150 struct cfg80211_auth_request auth_req = {};
151 struct cfg80211_assoc_request req = {};
152 int err;
153
154 lockdep_assert_wiphy(wdev->wiphy);
155
156 if (!wdev->conn)
157 return 0;
158
159 params = &wdev->conn->params;
160
161 switch (wdev->conn->state) {
162 case CFG80211_CONN_SCANNING:
163 /* didn't find it during scan ... */
164 return -ENOENT;
165 case CFG80211_CONN_SCAN_AGAIN:
166 return cfg80211_conn_scan(wdev);
167 case CFG80211_CONN_AUTHENTICATE_NEXT:
168 if (WARN_ON(!rdev->ops->auth))
169 return -EOPNOTSUPP;
170 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
171 auth_req.key = params->key;
172 auth_req.key_len = params->key_len;
173 auth_req.key_idx = params->key_idx;
174 auth_req.auth_type = params->auth_type;
175 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
176 params->bssid,
177 params->ssid, params->ssid_len,
178 IEEE80211_BSS_TYPE_ESS,
179 IEEE80211_PRIVACY_ANY);
180 auth_req.link_id = -1;
181 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
182 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
183 return err;
184 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
185 *treason = NL80211_TIMEOUT_AUTH;
186 return -ENOTCONN;
187 case CFG80211_CONN_ASSOCIATE_NEXT:
188 if (WARN_ON(!rdev->ops->assoc))
189 return -EOPNOTSUPP;
190 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
191 if (wdev->conn->prev_bssid_valid)
192 req.prev_bssid = wdev->conn->prev_bssid;
193 req.ie = params->ie;
194 req.ie_len = params->ie_len;
195 req.use_mfp = params->mfp != NL80211_MFP_NO;
196 req.crypto = params->crypto;
197 req.flags = params->flags;
198 req.ht_capa = params->ht_capa;
199 req.ht_capa_mask = params->ht_capa_mask;
200 req.vht_capa = params->vht_capa;
201 req.vht_capa_mask = params->vht_capa_mask;
202 req.link_id = -1;
203
204 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
205 params->bssid,
206 params->ssid, params->ssid_len,
207 IEEE80211_BSS_TYPE_ESS,
208 IEEE80211_PRIVACY_ANY);
209 if (!req.bss) {
210 err = -ENOENT;
211 } else {
212 err = cfg80211_mlme_assoc(rdev, wdev->netdev,
213 &req, NULL);
214 cfg80211_put_bss(&rdev->wiphy, req.bss);
215 }
216
217 if (err)
218 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
219 NULL, 0,
220 WLAN_REASON_DEAUTH_LEAVING,
221 false);
222 return err;
223 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
224 *treason = NL80211_TIMEOUT_ASSOC;
225 fallthrough;
226 case CFG80211_CONN_ASSOC_FAILED:
227 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
228 NULL, 0,
229 WLAN_REASON_DEAUTH_LEAVING, false);
230 return -ENOTCONN;
231 case CFG80211_CONN_DEAUTH:
232 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
233 NULL, 0,
234 WLAN_REASON_DEAUTH_LEAVING, false);
235 fallthrough;
236 case CFG80211_CONN_ABANDON:
237 /* free directly, disconnected event already sent */
238 cfg80211_sme_free(wdev);
239 return 0;
240 default:
241 return 0;
242 }
243}
244
245void cfg80211_conn_work(struct work_struct *work)
246{
247 struct cfg80211_registered_device *rdev =
248 container_of(work, struct cfg80211_registered_device, conn_work);
249 struct wireless_dev *wdev;
250 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
251 enum nl80211_timeout_reason treason;
252
253 wiphy_lock(&rdev->wiphy);
254
255 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
256 if (!wdev->netdev)
257 continue;
258
259 if (!netif_running(wdev->netdev))
260 continue;
261
262 if (!wdev->conn ||
263 wdev->conn->state == CFG80211_CONN_CONNECTED)
264 continue;
265
266 if (wdev->conn->params.bssid) {
267 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
268 bssid = bssid_buf;
269 }
270 treason = NL80211_TIMEOUT_UNSPECIFIED;
271 if (cfg80211_conn_do_work(wdev, &treason)) {
272 struct cfg80211_connect_resp_params cr;
273
274 memset(&cr, 0, sizeof(cr));
275 cr.status = -1;
276 cr.links[0].bssid = bssid;
277 cr.timeout_reason = treason;
278 __cfg80211_connect_result(wdev->netdev, &cr, false);
279 }
280 }
281
282 wiphy_unlock(&rdev->wiphy);
283}
284
285static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
286 struct cfg80211_bss *bss)
287{
288 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
289 conn->params.bssid = conn->bssid;
290 conn->params.channel = bss->channel;
291 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
292}
293
294/* Returned bss is reference counted and must be cleaned up appropriately. */
295static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
296{
297 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
298 struct cfg80211_bss *bss;
299
300 lockdep_assert_wiphy(wdev->wiphy);
301
302 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
303 wdev->conn->params.bssid,
304 wdev->conn->params.ssid,
305 wdev->conn->params.ssid_len,
306 wdev->conn_bss_type,
307 IEEE80211_PRIVACY(wdev->conn->params.privacy));
308 if (!bss)
309 return NULL;
310
311 cfg80211_step_auth_next(wdev->conn, bss);
312 schedule_work(&rdev->conn_work);
313
314 return bss;
315}
316
317void cfg80211_sme_scan_done(struct net_device *dev)
318{
319 struct wireless_dev *wdev = dev->ieee80211_ptr;
320 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
321 struct cfg80211_bss *bss;
322
323 lockdep_assert_wiphy(wdev->wiphy);
324
325 if (!wdev->conn)
326 return;
327
328 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
329 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
330 return;
331
332 bss = cfg80211_get_conn_bss(wdev);
333 if (bss)
334 cfg80211_put_bss(&rdev->wiphy, bss);
335 else
336 schedule_work(&rdev->conn_work);
337}
338
339void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
340{
341 struct wiphy *wiphy = wdev->wiphy;
342 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
343 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
344 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
345
346 lockdep_assert_wiphy(wdev->wiphy);
347
348 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
349 return;
350
351 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
352 wdev->conn->auto_auth &&
353 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
354 /* select automatically between only open, shared, leap */
355 switch (wdev->conn->params.auth_type) {
356 case NL80211_AUTHTYPE_OPEN_SYSTEM:
357 if (wdev->connect_keys)
358 wdev->conn->params.auth_type =
359 NL80211_AUTHTYPE_SHARED_KEY;
360 else
361 wdev->conn->params.auth_type =
362 NL80211_AUTHTYPE_NETWORK_EAP;
363 break;
364 case NL80211_AUTHTYPE_SHARED_KEY:
365 wdev->conn->params.auth_type =
366 NL80211_AUTHTYPE_NETWORK_EAP;
367 break;
368 default:
369 /* huh? */
370 wdev->conn->params.auth_type =
371 NL80211_AUTHTYPE_OPEN_SYSTEM;
372 break;
373 }
374 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
375 schedule_work(&rdev->conn_work);
376 } else if (status_code != WLAN_STATUS_SUCCESS) {
377 struct cfg80211_connect_resp_params cr;
378
379 memset(&cr, 0, sizeof(cr));
380 cr.status = status_code;
381 cr.links[0].bssid = mgmt->bssid;
382 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
383 __cfg80211_connect_result(wdev->netdev, &cr, false);
384 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
385 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
386 schedule_work(&rdev->conn_work);
387 }
388}
389
390bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
391{
392 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
393
394 if (!wdev->conn)
395 return false;
396
397 if (status == WLAN_STATUS_SUCCESS) {
398 wdev->conn->state = CFG80211_CONN_CONNECTED;
399 return false;
400 }
401
402 if (wdev->conn->prev_bssid_valid) {
403 /*
404 * Some stupid APs don't accept reassoc, so we
405 * need to fall back to trying regular assoc;
406 * return true so no event is sent to userspace.
407 */
408 wdev->conn->prev_bssid_valid = false;
409 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
410 schedule_work(&rdev->conn_work);
411 return true;
412 }
413
414 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
415 schedule_work(&rdev->conn_work);
416 return false;
417}
418
419void cfg80211_sme_deauth(struct wireless_dev *wdev)
420{
421 cfg80211_sme_free(wdev);
422}
423
424void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
425{
426 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
427
428 if (!wdev->conn)
429 return;
430
431 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
432 schedule_work(&rdev->conn_work);
433}
434
435void cfg80211_sme_disassoc(struct wireless_dev *wdev)
436{
437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
438
439 if (!wdev->conn)
440 return;
441
442 wdev->conn->state = CFG80211_CONN_DEAUTH;
443 schedule_work(&rdev->conn_work);
444}
445
446void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
447{
448 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
449
450 if (!wdev->conn)
451 return;
452
453 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
454 schedule_work(&rdev->conn_work);
455}
456
457void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
458{
459 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
460
461 if (!wdev->conn)
462 return;
463
464 wdev->conn->state = CFG80211_CONN_ABANDON;
465 schedule_work(&rdev->conn_work);
466}
467
468static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
469{
470 unsigned int link;
471
472 for_each_valid_link(wdev, link) {
473 if (!wdev->links[link].client.current_bss)
474 continue;
475 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
476 cfg80211_put_bss(wdev->wiphy,
477 &wdev->links[link].client.current_bss->pub);
478 wdev->links[link].client.current_bss = NULL;
479 }
480}
481
482void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
483{
484 unsigned int link;
485
486 for_each_valid_link(wdev, link) {
487 if (!wdev->links[link].client.current_bss ||
488 !(link_mask & BIT(link)))
489 continue;
490 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
491 cfg80211_put_bss(wdev->wiphy,
492 &wdev->links[link].client.current_bss->pub);
493 wdev->links[link].client.current_bss = NULL;
494 }
495}
496
497static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
498 const u8 *ies, size_t ies_len,
499 const u8 **out_ies, size_t *out_ies_len)
500{
501 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
502 u8 *buf;
503 size_t offs;
504
505 if (!rdev->wiphy.extended_capabilities_len ||
506 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
507 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
508 if (!*out_ies)
509 return -ENOMEM;
510 *out_ies_len = ies_len;
511 return 0;
512 }
513
514 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
515 GFP_KERNEL);
516 if (!buf)
517 return -ENOMEM;
518
519 if (ies_len) {
520 static const u8 before_extcapa[] = {
521 /* not listing IEs expected to be created by driver */
522 WLAN_EID_RSN,
523 WLAN_EID_QOS_CAPA,
524 WLAN_EID_RRM_ENABLED_CAPABILITIES,
525 WLAN_EID_MOBILITY_DOMAIN,
526 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
527 WLAN_EID_BSS_COEX_2040,
528 };
529
530 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
531 ARRAY_SIZE(before_extcapa), 0);
532 memcpy(buf, ies, offs);
533 /* leave a whole for extended capabilities IE */
534 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
535 ies + offs, ies_len - offs);
536 } else {
537 offs = 0;
538 }
539
540 /* place extended capabilities IE (with only driver capabilities) */
541 buf[offs] = WLAN_EID_EXT_CAPABILITY;
542 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
543 memcpy(buf + offs + 2,
544 rdev->wiphy.extended_capabilities,
545 rdev->wiphy.extended_capabilities_len);
546
547 *out_ies = buf;
548 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
549
550 return 0;
551}
552
553static int cfg80211_sme_connect(struct wireless_dev *wdev,
554 struct cfg80211_connect_params *connect,
555 const u8 *prev_bssid)
556{
557 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
558 struct cfg80211_bss *bss;
559 int err;
560
561 if (!rdev->ops->auth || !rdev->ops->assoc)
562 return -EOPNOTSUPP;
563
564 cfg80211_wdev_release_bsses(wdev);
565
566 if (wdev->connected) {
567 cfg80211_sme_free(wdev);
568 wdev->connected = false;
569 }
570
571 if (wdev->conn)
572 return -EINPROGRESS;
573
574 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
575 if (!wdev->conn)
576 return -ENOMEM;
577
578 /*
579 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
580 */
581 memcpy(&wdev->conn->params, connect, sizeof(*connect));
582 if (connect->bssid) {
583 wdev->conn->params.bssid = wdev->conn->bssid;
584 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
585 }
586
587 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
588 &wdev->conn->ie,
589 &wdev->conn->params.ie_len)) {
590 kfree(wdev->conn);
591 wdev->conn = NULL;
592 return -ENOMEM;
593 }
594 wdev->conn->params.ie = wdev->conn->ie;
595
596 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
597 wdev->conn->auto_auth = true;
598 /* start with open system ... should mostly work */
599 wdev->conn->params.auth_type =
600 NL80211_AUTHTYPE_OPEN_SYSTEM;
601 } else {
602 wdev->conn->auto_auth = false;
603 }
604
605 wdev->conn->params.ssid = wdev->u.client.ssid;
606 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
607
608 /* see if we have the bss already */
609 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
610 wdev->conn->params.bssid,
611 wdev->conn->params.ssid,
612 wdev->conn->params.ssid_len,
613 wdev->conn_bss_type,
614 IEEE80211_PRIVACY(wdev->conn->params.privacy));
615
616 if (prev_bssid) {
617 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
618 wdev->conn->prev_bssid_valid = true;
619 }
620
621 /* we're good if we have a matching bss struct */
622 if (bss) {
623 enum nl80211_timeout_reason treason;
624
625 cfg80211_step_auth_next(wdev->conn, bss);
626 err = cfg80211_conn_do_work(wdev, &treason);
627 cfg80211_put_bss(wdev->wiphy, bss);
628 } else {
629 /* otherwise we'll need to scan for the AP first */
630 err = cfg80211_conn_scan(wdev);
631
632 /*
633 * If we can't scan right now, then we need to scan again
634 * after the current scan finished, since the parameters
635 * changed (unless we find a good AP anyway).
636 */
637 if (err == -EBUSY) {
638 err = 0;
639 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
640 }
641 }
642
643 if (err)
644 cfg80211_sme_free(wdev);
645
646 return err;
647}
648
649static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
650{
651 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
652 int err;
653
654 if (!wdev->conn)
655 return 0;
656
657 if (!rdev->ops->deauth)
658 return -EOPNOTSUPP;
659
660 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
661 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
662 err = 0;
663 goto out;
664 }
665
666 /* wdev->conn->params.bssid must be set if > SCANNING */
667 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
668 wdev->conn->params.bssid,
669 NULL, 0, reason, false);
670 out:
671 cfg80211_sme_free(wdev);
672 return err;
673}
674
675/*
676 * code shared for in-device and software SME
677 */
678
679static bool cfg80211_is_all_idle(void)
680{
681 struct cfg80211_registered_device *rdev;
682 struct wireless_dev *wdev;
683 bool is_all_idle = true;
684
685 /*
686 * All devices must be idle as otherwise if you are actively
687 * scanning some new beacon hints could be learned and would
688 * count as new regulatory hints.
689 * Also if there is any other active beaconing interface we
690 * need not issue a disconnect hint and reset any info such
691 * as chan dfs state, etc.
692 */
693 for_each_rdev(rdev) {
694 wiphy_lock(&rdev->wiphy);
695 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
696 if (wdev->conn || wdev->connected ||
697 cfg80211_beaconing_iface_active(wdev))
698 is_all_idle = false;
699 }
700 wiphy_unlock(&rdev->wiphy);
701 }
702
703 return is_all_idle;
704}
705
706static void disconnect_work(struct work_struct *work)
707{
708 rtnl_lock();
709 if (cfg80211_is_all_idle())
710 regulatory_hint_disconnect();
711 rtnl_unlock();
712}
713
714DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
715
716static void
717cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
718 struct cfg80211_connect_resp_params *cr)
719{
720 unsigned int link;
721
722 for_each_valid_link(cr, link) {
723 if (!cr->links[link].bss)
724 continue;
725 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
726 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
727 }
728}
729
730/*
731 * API calls for drivers implementing connect/disconnect and
732 * SME event handling
733 */
734
735/* This method must consume bss one way or another */
736void __cfg80211_connect_result(struct net_device *dev,
737 struct cfg80211_connect_resp_params *cr,
738 bool wextev)
739{
740 struct wireless_dev *wdev = dev->ieee80211_ptr;
741 const struct element *country_elem = NULL;
742 const struct element *ssid;
743 const u8 *country_data;
744 u8 country_datalen;
745#ifdef CONFIG_CFG80211_WEXT
746 union iwreq_data wrqu;
747#endif
748 unsigned int link;
749 const u8 *connected_addr;
750 bool bss_not_found = false;
751
752 lockdep_assert_wiphy(wdev->wiphy);
753
754 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
755 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
756 goto out;
757
758 if (cr->valid_links) {
759 if (WARN_ON(!cr->ap_mld_addr))
760 goto out;
761
762 for_each_valid_link(cr, link) {
763 if (WARN_ON(!cr->links[link].addr))
764 goto out;
765 }
766
767 if (WARN_ON(wdev->connect_keys))
768 goto out;
769 }
770
771 wdev->unprot_beacon_reported = 0;
772 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
773 GFP_KERNEL);
774 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
775
776#ifdef CONFIG_CFG80211_WEXT
777 if (wextev && !cr->valid_links) {
778 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
779 memset(&wrqu, 0, sizeof(wrqu));
780 wrqu.data.length = cr->req_ie_len;
781 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
782 cr->req_ie);
783 }
784
785 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
786 memset(&wrqu, 0, sizeof(wrqu));
787 wrqu.data.length = cr->resp_ie_len;
788 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
789 cr->resp_ie);
790 }
791
792 memset(&wrqu, 0, sizeof(wrqu));
793 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
794 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
795 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
796 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
797 wdev->wext.prev_bssid_valid = true;
798 }
799 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
800 }
801#endif
802
803 if (cr->status == WLAN_STATUS_SUCCESS) {
804 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
805 for_each_valid_link(cr, link) {
806 if (WARN_ON_ONCE(!cr->links[link].bss))
807 break;
808 }
809 }
810
811 for_each_valid_link(cr, link) {
812 /* don't do extra lookups for failures */
813 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
814 continue;
815
816 if (cr->links[link].bss)
817 continue;
818
819 cr->links[link].bss =
820 cfg80211_get_bss(wdev->wiphy, NULL,
821 cr->links[link].bssid,
822 wdev->u.client.ssid,
823 wdev->u.client.ssid_len,
824 wdev->conn_bss_type,
825 IEEE80211_PRIVACY_ANY);
826 if (!cr->links[link].bss) {
827 bss_not_found = true;
828 break;
829 }
830 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
831 }
832 }
833
834 cfg80211_wdev_release_bsses(wdev);
835
836 if (cr->status != WLAN_STATUS_SUCCESS) {
837 kfree_sensitive(wdev->connect_keys);
838 wdev->connect_keys = NULL;
839 wdev->u.client.ssid_len = 0;
840 wdev->conn_owner_nlportid = 0;
841 cfg80211_connect_result_release_bsses(wdev, cr);
842 cfg80211_sme_free(wdev);
843 return;
844 }
845
846 if (WARN_ON(bss_not_found)) {
847 cfg80211_connect_result_release_bsses(wdev, cr);
848 return;
849 }
850
851 memset(wdev->links, 0, sizeof(wdev->links));
852 for_each_valid_link(cr, link) {
853 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
854 continue;
855 cr->valid_links &= ~BIT(link);
856 /* don't require bss pointer for failed links */
857 if (!cr->links[link].bss)
858 continue;
859 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
860 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
861 }
862 wdev->valid_links = cr->valid_links;
863 for_each_valid_link(cr, link)
864 wdev->links[link].client.current_bss =
865 bss_from_pub(cr->links[link].bss);
866 wdev->connected = true;
867 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
868 if (cr->valid_links) {
869 for_each_valid_link(cr, link)
870 memcpy(wdev->links[link].addr, cr->links[link].addr,
871 ETH_ALEN);
872 }
873
874 cfg80211_upload_connect_keys(wdev);
875
876 rcu_read_lock();
877 for_each_valid_link(cr, link) {
878 country_elem =
879 ieee80211_bss_get_elem(cr->links[link].bss,
880 WLAN_EID_COUNTRY);
881 if (country_elem)
882 break;
883 }
884 if (!country_elem) {
885 rcu_read_unlock();
886 return;
887 }
888
889 country_datalen = country_elem->datalen;
890 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
891 rcu_read_unlock();
892
893 if (!country_data)
894 return;
895
896 regulatory_hint_country_ie(wdev->wiphy,
897 cr->links[link].bss->channel->band,
898 country_data, country_datalen);
899 kfree(country_data);
900
901 if (!wdev->u.client.ssid_len) {
902 rcu_read_lock();
903 for_each_valid_link(cr, link) {
904 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
905 WLAN_EID_SSID);
906
907 if (!ssid || !ssid->datalen)
908 continue;
909
910 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
911 wdev->u.client.ssid_len = ssid->datalen;
912 break;
913 }
914 rcu_read_unlock();
915 }
916
917 return;
918out:
919 for_each_valid_link(cr, link)
920 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
921}
922
923static void cfg80211_update_link_bss(struct wireless_dev *wdev,
924 struct cfg80211_bss **bss)
925{
926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
927 struct cfg80211_internal_bss *ibss;
928
929 if (!*bss)
930 return;
931
932 ibss = bss_from_pub(*bss);
933 if (list_empty(&ibss->list)) {
934 struct cfg80211_bss *found = NULL, *tmp = *bss;
935
936 found = cfg80211_get_bss(wdev->wiphy, NULL,
937 (*bss)->bssid,
938 wdev->u.client.ssid,
939 wdev->u.client.ssid_len,
940 wdev->conn_bss_type,
941 IEEE80211_PRIVACY_ANY);
942 if (found) {
943 /* The same BSS is already updated so use it
944 * instead, as it has latest info.
945 */
946 *bss = found;
947 } else {
948 /* Update with BSS provided by driver, it will
949 * be freshly added and ref cnted, we can free
950 * the old one.
951 *
952 * signal_valid can be false, as we are not
953 * expecting the BSS to be found.
954 *
955 * keep the old timestamp to avoid confusion
956 */
957 cfg80211_bss_update(rdev, ibss, false,
958 ibss->ts);
959 }
960
961 cfg80211_put_bss(wdev->wiphy, tmp);
962 }
963}
964
965/* Consumes bss object(s) one way or another */
966void cfg80211_connect_done(struct net_device *dev,
967 struct cfg80211_connect_resp_params *params,
968 gfp_t gfp)
969{
970 struct wireless_dev *wdev = dev->ieee80211_ptr;
971 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
972 struct cfg80211_event *ev;
973 unsigned long flags;
974 u8 *next;
975 size_t link_info_size = 0;
976 unsigned int link;
977
978 for_each_valid_link(params, link) {
979 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
980 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
981 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
982 }
983
984 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
985 params->req_ie_len + params->resp_ie_len +
986 params->fils.kek_len + params->fils.pmk_len +
987 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
988 gfp);
989
990 if (!ev) {
991 for_each_valid_link(params, link)
992 cfg80211_put_bss(wdev->wiphy,
993 params->links[link].bss);
994 return;
995 }
996
997 ev->type = EVENT_CONNECT_RESULT;
998 next = ((u8 *)ev) + sizeof(*ev);
999 if (params->ap_mld_addr) {
1000 ev->cr.ap_mld_addr = next;
1001 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1002 ETH_ALEN);
1003 next += ETH_ALEN;
1004 }
1005 if (params->req_ie_len) {
1006 ev->cr.req_ie = next;
1007 ev->cr.req_ie_len = params->req_ie_len;
1008 memcpy((void *)ev->cr.req_ie, params->req_ie,
1009 params->req_ie_len);
1010 next += params->req_ie_len;
1011 }
1012 if (params->resp_ie_len) {
1013 ev->cr.resp_ie = next;
1014 ev->cr.resp_ie_len = params->resp_ie_len;
1015 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1016 params->resp_ie_len);
1017 next += params->resp_ie_len;
1018 }
1019 if (params->fils.kek_len) {
1020 ev->cr.fils.kek = next;
1021 ev->cr.fils.kek_len = params->fils.kek_len;
1022 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1023 params->fils.kek_len);
1024 next += params->fils.kek_len;
1025 }
1026 if (params->fils.pmk_len) {
1027 ev->cr.fils.pmk = next;
1028 ev->cr.fils.pmk_len = params->fils.pmk_len;
1029 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1030 params->fils.pmk_len);
1031 next += params->fils.pmk_len;
1032 }
1033 if (params->fils.pmkid) {
1034 ev->cr.fils.pmkid = next;
1035 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1036 WLAN_PMKID_LEN);
1037 next += WLAN_PMKID_LEN;
1038 }
1039 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1040 if (params->fils.update_erp_next_seq_num)
1041 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1042 ev->cr.valid_links = params->valid_links;
1043 for_each_valid_link(params, link) {
1044 if (params->links[link].bss)
1045 cfg80211_hold_bss(
1046 bss_from_pub(params->links[link].bss));
1047 ev->cr.links[link].bss = params->links[link].bss;
1048
1049 if (params->links[link].addr) {
1050 ev->cr.links[link].addr = next;
1051 memcpy((void *)ev->cr.links[link].addr,
1052 params->links[link].addr,
1053 ETH_ALEN);
1054 next += ETH_ALEN;
1055 }
1056 if (params->links[link].bssid) {
1057 ev->cr.links[link].bssid = next;
1058 memcpy((void *)ev->cr.links[link].bssid,
1059 params->links[link].bssid,
1060 ETH_ALEN);
1061 next += ETH_ALEN;
1062 }
1063 }
1064 ev->cr.status = params->status;
1065 ev->cr.timeout_reason = params->timeout_reason;
1066
1067 spin_lock_irqsave(&wdev->event_lock, flags);
1068 list_add_tail(&ev->list, &wdev->event_list);
1069 spin_unlock_irqrestore(&wdev->event_lock, flags);
1070 queue_work(cfg80211_wq, &rdev->event_work);
1071}
1072EXPORT_SYMBOL(cfg80211_connect_done);
1073
1074/* Consumes bss object one way or another */
1075void __cfg80211_roamed(struct wireless_dev *wdev,
1076 struct cfg80211_roam_info *info)
1077{
1078#ifdef CONFIG_CFG80211_WEXT
1079 union iwreq_data wrqu;
1080#endif
1081 unsigned int link;
1082 const u8 *connected_addr;
1083
1084 lockdep_assert_wiphy(wdev->wiphy);
1085
1086 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1087 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1088 goto out;
1089
1090 if (WARN_ON(!wdev->connected))
1091 goto out;
1092
1093 if (info->valid_links) {
1094 if (WARN_ON(!info->ap_mld_addr))
1095 goto out;
1096
1097 for_each_valid_link(info, link) {
1098 if (WARN_ON(!info->links[link].addr))
1099 goto out;
1100 }
1101 }
1102
1103 cfg80211_wdev_release_bsses(wdev);
1104
1105 for_each_valid_link(info, link) {
1106 if (WARN_ON(!info->links[link].bss))
1107 goto out;
1108 }
1109
1110 memset(wdev->links, 0, sizeof(wdev->links));
1111 wdev->valid_links = info->valid_links;
1112 for_each_valid_link(info, link) {
1113 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1114 wdev->links[link].client.current_bss =
1115 bss_from_pub(info->links[link].bss);
1116 }
1117
1118 connected_addr = info->valid_links ?
1119 info->ap_mld_addr :
1120 info->links[0].bss->bssid;
1121 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1122 if (info->valid_links) {
1123 for_each_valid_link(info, link)
1124 memcpy(wdev->links[link].addr, info->links[link].addr,
1125 ETH_ALEN);
1126 }
1127 wdev->unprot_beacon_reported = 0;
1128 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1129 wdev->netdev, info, GFP_KERNEL);
1130
1131#ifdef CONFIG_CFG80211_WEXT
1132 if (!info->valid_links) {
1133 if (info->req_ie) {
1134 memset(&wrqu, 0, sizeof(wrqu));
1135 wrqu.data.length = info->req_ie_len;
1136 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1137 &wrqu, info->req_ie);
1138 }
1139
1140 if (info->resp_ie) {
1141 memset(&wrqu, 0, sizeof(wrqu));
1142 wrqu.data.length = info->resp_ie_len;
1143 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1144 &wrqu, info->resp_ie);
1145 }
1146
1147 memset(&wrqu, 0, sizeof(wrqu));
1148 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1149 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1150 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1151 wdev->wext.prev_bssid_valid = true;
1152 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1153 }
1154#endif
1155
1156 return;
1157out:
1158 for_each_valid_link(info, link)
1159 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1160}
1161
1162/* Consumes info->links.bss object(s) one way or another */
1163void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1164 gfp_t gfp)
1165{
1166 struct wireless_dev *wdev = dev->ieee80211_ptr;
1167 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1168 struct cfg80211_event *ev;
1169 unsigned long flags;
1170 u8 *next;
1171 unsigned int link;
1172 size_t link_info_size = 0;
1173 bool bss_not_found = false;
1174
1175 for_each_valid_link(info, link) {
1176 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1177 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1178
1179 if (info->links[link].bss)
1180 continue;
1181
1182 info->links[link].bss =
1183 cfg80211_get_bss(wdev->wiphy,
1184 info->links[link].channel,
1185 info->links[link].bssid,
1186 wdev->u.client.ssid,
1187 wdev->u.client.ssid_len,
1188 wdev->conn_bss_type,
1189 IEEE80211_PRIVACY_ANY);
1190
1191 if (!info->links[link].bss) {
1192 bss_not_found = true;
1193 break;
1194 }
1195 }
1196
1197 if (WARN_ON(bss_not_found))
1198 goto out;
1199
1200 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1201 info->fils.kek_len + info->fils.pmk_len +
1202 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1203 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1204 if (!ev)
1205 goto out;
1206
1207 ev->type = EVENT_ROAMED;
1208 next = ((u8 *)ev) + sizeof(*ev);
1209 if (info->req_ie_len) {
1210 ev->rm.req_ie = next;
1211 ev->rm.req_ie_len = info->req_ie_len;
1212 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1213 next += info->req_ie_len;
1214 }
1215 if (info->resp_ie_len) {
1216 ev->rm.resp_ie = next;
1217 ev->rm.resp_ie_len = info->resp_ie_len;
1218 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1219 info->resp_ie_len);
1220 next += info->resp_ie_len;
1221 }
1222 if (info->fils.kek_len) {
1223 ev->rm.fils.kek = next;
1224 ev->rm.fils.kek_len = info->fils.kek_len;
1225 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1226 info->fils.kek_len);
1227 next += info->fils.kek_len;
1228 }
1229 if (info->fils.pmk_len) {
1230 ev->rm.fils.pmk = next;
1231 ev->rm.fils.pmk_len = info->fils.pmk_len;
1232 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1233 info->fils.pmk_len);
1234 next += info->fils.pmk_len;
1235 }
1236 if (info->fils.pmkid) {
1237 ev->rm.fils.pmkid = next;
1238 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1239 WLAN_PMKID_LEN);
1240 next += WLAN_PMKID_LEN;
1241 }
1242 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1243 if (info->fils.update_erp_next_seq_num)
1244 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1245 if (info->ap_mld_addr) {
1246 ev->rm.ap_mld_addr = next;
1247 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1248 ETH_ALEN);
1249 next += ETH_ALEN;
1250 }
1251 ev->rm.valid_links = info->valid_links;
1252 for_each_valid_link(info, link) {
1253 ev->rm.links[link].bss = info->links[link].bss;
1254
1255 if (info->links[link].addr) {
1256 ev->rm.links[link].addr = next;
1257 memcpy((void *)ev->rm.links[link].addr,
1258 info->links[link].addr,
1259 ETH_ALEN);
1260 next += ETH_ALEN;
1261 }
1262
1263 if (info->links[link].bssid) {
1264 ev->rm.links[link].bssid = next;
1265 memcpy((void *)ev->rm.links[link].bssid,
1266 info->links[link].bssid,
1267 ETH_ALEN);
1268 next += ETH_ALEN;
1269 }
1270 }
1271
1272 spin_lock_irqsave(&wdev->event_lock, flags);
1273 list_add_tail(&ev->list, &wdev->event_list);
1274 spin_unlock_irqrestore(&wdev->event_lock, flags);
1275 queue_work(cfg80211_wq, &rdev->event_work);
1276
1277 return;
1278out:
1279 for_each_valid_link(info, link)
1280 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1281
1282}
1283EXPORT_SYMBOL(cfg80211_roamed);
1284
1285void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1286 const u8 *td_bitmap, u8 td_bitmap_len)
1287{
1288 lockdep_assert_wiphy(wdev->wiphy);
1289
1290 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1291 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1292 wdev->iftype != NL80211_IFTYPE_AP &&
1293 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1294 return;
1295
1296 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1297 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1298 if (WARN_ON(!wdev->connected) ||
1299 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1300 return;
1301 }
1302
1303 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1304 peer_addr, td_bitmap, td_bitmap_len);
1305}
1306
1307void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1308 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1309{
1310 struct wireless_dev *wdev = dev->ieee80211_ptr;
1311 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1312 struct cfg80211_event *ev;
1313 unsigned long flags;
1314
1315 if (WARN_ON(!peer_addr))
1316 return;
1317
1318 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1319 if (!ev)
1320 return;
1321
1322 ev->type = EVENT_PORT_AUTHORIZED;
1323 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1324 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1325 ev->pa.td_bitmap_len = td_bitmap_len;
1326 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1327
1328 /*
1329 * Use the wdev event list so that if there are pending
1330 * connected/roamed events, they will be reported first.
1331 */
1332 spin_lock_irqsave(&wdev->event_lock, flags);
1333 list_add_tail(&ev->list, &wdev->event_list);
1334 spin_unlock_irqrestore(&wdev->event_lock, flags);
1335 queue_work(cfg80211_wq, &rdev->event_work);
1336}
1337EXPORT_SYMBOL(cfg80211_port_authorized);
1338
1339void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1340 size_t ie_len, u16 reason, bool from_ap)
1341{
1342 struct wireless_dev *wdev = dev->ieee80211_ptr;
1343 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1344 int i;
1345#ifdef CONFIG_CFG80211_WEXT
1346 union iwreq_data wrqu;
1347#endif
1348
1349 lockdep_assert_wiphy(wdev->wiphy);
1350
1351 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1352 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1353 return;
1354
1355 cfg80211_wdev_release_bsses(wdev);
1356 wdev->connected = false;
1357 wdev->u.client.ssid_len = 0;
1358 wdev->conn_owner_nlportid = 0;
1359 kfree_sensitive(wdev->connect_keys);
1360 wdev->connect_keys = NULL;
1361
1362 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1363
1364 /* stop critical protocol if supported */
1365 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1366 rdev->crit_proto_nlportid = 0;
1367 rdev_crit_proto_stop(rdev, wdev);
1368 }
1369
1370 /*
1371 * Delete all the keys ... pairwise keys can't really
1372 * exist any more anyway, but default keys might.
1373 */
1374 if (rdev->ops->del_key) {
1375 int max_key_idx = 5;
1376
1377 if (wiphy_ext_feature_isset(
1378 wdev->wiphy,
1379 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1380 wiphy_ext_feature_isset(
1381 wdev->wiphy,
1382 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1383 max_key_idx = 7;
1384 for (i = 0; i <= max_key_idx; i++)
1385 rdev_del_key(rdev, dev, -1, i, false, NULL);
1386 }
1387
1388 rdev_set_qos_map(rdev, dev, NULL);
1389
1390#ifdef CONFIG_CFG80211_WEXT
1391 memset(&wrqu, 0, sizeof(wrqu));
1392 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1393 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1394 wdev->wext.connect.ssid_len = 0;
1395#endif
1396
1397 schedule_work(&cfg80211_disconnect_work);
1398
1399 cfg80211_schedule_channels_check(wdev);
1400}
1401
1402void cfg80211_disconnected(struct net_device *dev, u16 reason,
1403 const u8 *ie, size_t ie_len,
1404 bool locally_generated, gfp_t gfp)
1405{
1406 struct wireless_dev *wdev = dev->ieee80211_ptr;
1407 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1408 struct cfg80211_event *ev;
1409 unsigned long flags;
1410
1411 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1412 if (!ev)
1413 return;
1414
1415 ev->type = EVENT_DISCONNECTED;
1416 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1417 ev->dc.ie_len = ie_len;
1418 memcpy((void *)ev->dc.ie, ie, ie_len);
1419 ev->dc.reason = reason;
1420 ev->dc.locally_generated = locally_generated;
1421
1422 spin_lock_irqsave(&wdev->event_lock, flags);
1423 list_add_tail(&ev->list, &wdev->event_list);
1424 spin_unlock_irqrestore(&wdev->event_lock, flags);
1425 queue_work(cfg80211_wq, &rdev->event_work);
1426}
1427EXPORT_SYMBOL(cfg80211_disconnected);
1428
1429/*
1430 * API calls for nl80211/wext compatibility code
1431 */
1432int cfg80211_connect(struct cfg80211_registered_device *rdev,
1433 struct net_device *dev,
1434 struct cfg80211_connect_params *connect,
1435 struct cfg80211_cached_keys *connkeys,
1436 const u8 *prev_bssid)
1437{
1438 struct wireless_dev *wdev = dev->ieee80211_ptr;
1439 int err;
1440
1441 lockdep_assert_wiphy(wdev->wiphy);
1442
1443 /*
1444 * If we have an ssid_len, we're trying to connect or are
1445 * already connected, so reject a new SSID unless it's the
1446 * same (which is the case for re-association.)
1447 */
1448 if (wdev->u.client.ssid_len &&
1449 (wdev->u.client.ssid_len != connect->ssid_len ||
1450 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1451 return -EALREADY;
1452
1453 /*
1454 * If connected, reject (re-)association unless prev_bssid
1455 * matches the current BSSID.
1456 */
1457 if (wdev->connected) {
1458 if (!prev_bssid)
1459 return -EALREADY;
1460 if (!ether_addr_equal(prev_bssid,
1461 wdev->u.client.connected_addr))
1462 return -ENOTCONN;
1463 }
1464
1465 /*
1466 * Reject if we're in the process of connecting with WEP,
1467 * this case isn't very interesting and trying to handle
1468 * it would make the code much more complex.
1469 */
1470 if (wdev->connect_keys)
1471 return -EINPROGRESS;
1472
1473 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1474 rdev->wiphy.ht_capa_mod_mask);
1475 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1476 rdev->wiphy.vht_capa_mod_mask);
1477
1478 if (connkeys && connkeys->def >= 0) {
1479 int idx;
1480 u32 cipher;
1481
1482 idx = connkeys->def;
1483 cipher = connkeys->params[idx].cipher;
1484 /* If given a WEP key we may need it for shared key auth */
1485 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1486 cipher == WLAN_CIPHER_SUITE_WEP104) {
1487 connect->key_idx = idx;
1488 connect->key = connkeys->params[idx].key;
1489 connect->key_len = connkeys->params[idx].key_len;
1490
1491 /*
1492 * If ciphers are not set (e.g. when going through
1493 * iwconfig), we have to set them appropriately here.
1494 */
1495 if (connect->crypto.cipher_group == 0)
1496 connect->crypto.cipher_group = cipher;
1497
1498 if (connect->crypto.n_ciphers_pairwise == 0) {
1499 connect->crypto.n_ciphers_pairwise = 1;
1500 connect->crypto.ciphers_pairwise[0] = cipher;
1501 }
1502 }
1503 } else {
1504 if (WARN_ON(connkeys))
1505 return -EINVAL;
1506
1507 /* connect can point to wdev->wext.connect which
1508 * can hold key data from a previous connection
1509 */
1510 connect->key = NULL;
1511 connect->key_len = 0;
1512 connect->key_idx = 0;
1513 }
1514
1515 wdev->connect_keys = connkeys;
1516 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1517 wdev->u.client.ssid_len = connect->ssid_len;
1518
1519 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1520 IEEE80211_BSS_TYPE_ESS;
1521
1522 if (!rdev->ops->connect)
1523 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1524 else
1525 err = rdev_connect(rdev, dev, connect);
1526
1527 if (err) {
1528 wdev->connect_keys = NULL;
1529 /*
1530 * This could be reassoc getting refused, don't clear
1531 * ssid_len in that case.
1532 */
1533 if (!wdev->connected)
1534 wdev->u.client.ssid_len = 0;
1535 return err;
1536 }
1537
1538 return 0;
1539}
1540
1541int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1542 struct net_device *dev, u16 reason, bool wextev)
1543{
1544 struct wireless_dev *wdev = dev->ieee80211_ptr;
1545 int err = 0;
1546
1547 lockdep_assert_wiphy(wdev->wiphy);
1548
1549 kfree_sensitive(wdev->connect_keys);
1550 wdev->connect_keys = NULL;
1551
1552 wdev->conn_owner_nlportid = 0;
1553
1554 if (wdev->conn)
1555 err = cfg80211_sme_disconnect(wdev, reason);
1556 else if (!rdev->ops->disconnect)
1557 cfg80211_mlme_down(rdev, dev);
1558 else if (wdev->u.client.ssid_len)
1559 err = rdev_disconnect(rdev, dev, reason);
1560
1561 /*
1562 * Clear ssid_len unless we actually were fully connected,
1563 * in which case cfg80211_disconnected() will take care of
1564 * this later.
1565 */
1566 if (!wdev->connected)
1567 wdev->u.client.ssid_len = 0;
1568
1569 return err;
1570}
1571
1572/*
1573 * Used to clean up after the connection / connection attempt owner socket
1574 * disconnects
1575 */
1576void cfg80211_autodisconnect_wk(struct work_struct *work)
1577{
1578 struct wireless_dev *wdev =
1579 container_of(work, struct wireless_dev, disconnect_wk);
1580 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1581
1582 wiphy_lock(wdev->wiphy);
1583
1584 if (wdev->conn_owner_nlportid) {
1585 switch (wdev->iftype) {
1586 case NL80211_IFTYPE_ADHOC:
1587 cfg80211_leave_ibss(rdev, wdev->netdev, false);
1588 break;
1589 case NL80211_IFTYPE_AP:
1590 case NL80211_IFTYPE_P2P_GO:
1591 cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1592 break;
1593 case NL80211_IFTYPE_MESH_POINT:
1594 cfg80211_leave_mesh(rdev, wdev->netdev);
1595 break;
1596 case NL80211_IFTYPE_STATION:
1597 case NL80211_IFTYPE_P2P_CLIENT:
1598 /*
1599 * Use disconnect_bssid if still connecting and
1600 * ops->disconnect not implemented. Otherwise we can
1601 * use cfg80211_disconnect.
1602 */
1603 if (rdev->ops->disconnect || wdev->connected)
1604 cfg80211_disconnect(rdev, wdev->netdev,
1605 WLAN_REASON_DEAUTH_LEAVING,
1606 true);
1607 else
1608 cfg80211_mlme_deauth(rdev, wdev->netdev,
1609 wdev->disconnect_bssid,
1610 NULL, 0,
1611 WLAN_REASON_DEAUTH_LEAVING,
1612 false);
1613 break;
1614 default:
1615 break;
1616 }
1617 }
1618
1619 wiphy_unlock(wdev->wiphy);
1620}