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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_ABANDON,
43 CFG80211_CONN_CONNECTED,
44 } state;
45 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
46 const u8 *ie;
47 size_t ie_len;
48 bool auto_auth, prev_bssid_valid;
49};
50
51static void cfg80211_sme_free(struct wireless_dev *wdev)
52{
53 if (!wdev->conn)
54 return;
55
56 kfree(wdev->conn->ie);
57 kfree(wdev->conn);
58 wdev->conn = NULL;
59}
60
61static int cfg80211_conn_scan(struct wireless_dev *wdev)
62{
63 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
64 struct cfg80211_scan_request *request;
65 int n_channels, err;
66
67 ASSERT_RTNL();
68 ASSERT_WDEV_LOCK(wdev);
69
70 if (rdev->scan_req || rdev->scan_msg)
71 return -EBUSY;
72
73 if (wdev->conn->params.channel)
74 n_channels = 1;
75 else
76 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
77
78 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
79 sizeof(request->channels[0]) * n_channels,
80 GFP_KERNEL);
81 if (!request)
82 return -ENOMEM;
83
84 if (wdev->conn->params.channel) {
85 enum nl80211_band band = wdev->conn->params.channel->band;
86 struct ieee80211_supported_band *sband =
87 wdev->wiphy->bands[band];
88
89 if (!sband) {
90 kfree(request);
91 return -EINVAL;
92 }
93 request->channels[0] = wdev->conn->params.channel;
94 request->rates[band] = (1 << sband->n_bitrates) - 1;
95 } else {
96 int i = 0, j;
97 enum nl80211_band band;
98 struct ieee80211_supported_band *bands;
99 struct ieee80211_channel *channel;
100
101 for (band = 0; band < NUM_NL80211_BANDS; band++) {
102 bands = wdev->wiphy->bands[band];
103 if (!bands)
104 continue;
105 for (j = 0; j < bands->n_channels; j++) {
106 channel = &bands->channels[j];
107 if (channel->flags & IEEE80211_CHAN_DISABLED)
108 continue;
109 request->channels[i++] = channel;
110 }
111 request->rates[band] = (1 << bands->n_bitrates) - 1;
112 }
113 n_channels = i;
114 }
115 request->n_channels = n_channels;
116 request->ssids = (void *)&request->channels[n_channels];
117 request->n_ssids = 1;
118
119 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
120 wdev->conn->params.ssid_len);
121 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
122
123 eth_broadcast_addr(request->bssid);
124
125 request->wdev = wdev;
126 request->wiphy = &rdev->wiphy;
127 request->scan_start = jiffies;
128
129 rdev->scan_req = request;
130
131 err = rdev_scan(rdev, request);
132 if (!err) {
133 wdev->conn->state = CFG80211_CONN_SCANNING;
134 nl80211_send_scan_start(rdev, wdev);
135 dev_hold(wdev->netdev);
136 } else {
137 rdev->scan_req = NULL;
138 kfree(request);
139 }
140 return err;
141}
142
143static int cfg80211_conn_do_work(struct wireless_dev *wdev)
144{
145 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
146 struct cfg80211_connect_params *params;
147 struct cfg80211_assoc_request req = {};
148 int err;
149
150 ASSERT_WDEV_LOCK(wdev);
151
152 if (!wdev->conn)
153 return 0;
154
155 params = &wdev->conn->params;
156
157 switch (wdev->conn->state) {
158 case CFG80211_CONN_SCANNING:
159 /* didn't find it during scan ... */
160 return -ENOENT;
161 case CFG80211_CONN_SCAN_AGAIN:
162 return cfg80211_conn_scan(wdev);
163 case CFG80211_CONN_AUTHENTICATE_NEXT:
164 if (WARN_ON(!rdev->ops->auth))
165 return -EOPNOTSUPP;
166 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
167 return cfg80211_mlme_auth(rdev, wdev->netdev,
168 params->channel, params->auth_type,
169 params->bssid,
170 params->ssid, params->ssid_len,
171 NULL, 0,
172 params->key, params->key_len,
173 params->key_idx, NULL, 0);
174 case CFG80211_CONN_AUTH_FAILED:
175 return -ENOTCONN;
176 case CFG80211_CONN_ASSOCIATE_NEXT:
177 if (WARN_ON(!rdev->ops->assoc))
178 return -EOPNOTSUPP;
179 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
180 if (wdev->conn->prev_bssid_valid)
181 req.prev_bssid = wdev->conn->prev_bssid;
182 req.ie = params->ie;
183 req.ie_len = params->ie_len;
184 req.use_mfp = params->mfp != NL80211_MFP_NO;
185 req.crypto = params->crypto;
186 req.flags = params->flags;
187 req.ht_capa = params->ht_capa;
188 req.ht_capa_mask = params->ht_capa_mask;
189 req.vht_capa = params->vht_capa;
190 req.vht_capa_mask = params->vht_capa_mask;
191
192 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
193 params->bssid, params->ssid,
194 params->ssid_len, &req);
195 if (err)
196 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
197 NULL, 0,
198 WLAN_REASON_DEAUTH_LEAVING,
199 false);
200 return err;
201 case CFG80211_CONN_ASSOC_FAILED:
202 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
203 NULL, 0,
204 WLAN_REASON_DEAUTH_LEAVING, false);
205 return -ENOTCONN;
206 case CFG80211_CONN_DEAUTH:
207 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
208 NULL, 0,
209 WLAN_REASON_DEAUTH_LEAVING, false);
210 /* fall through */
211 case CFG80211_CONN_ABANDON:
212 /* free directly, disconnected event already sent */
213 cfg80211_sme_free(wdev);
214 return 0;
215 default:
216 return 0;
217 }
218}
219
220void cfg80211_conn_work(struct work_struct *work)
221{
222 struct cfg80211_registered_device *rdev =
223 container_of(work, struct cfg80211_registered_device, conn_work);
224 struct wireless_dev *wdev;
225 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
226
227 rtnl_lock();
228
229 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
230 if (!wdev->netdev)
231 continue;
232
233 wdev_lock(wdev);
234 if (!netif_running(wdev->netdev)) {
235 wdev_unlock(wdev);
236 continue;
237 }
238 if (!wdev->conn ||
239 wdev->conn->state == CFG80211_CONN_CONNECTED) {
240 wdev_unlock(wdev);
241 continue;
242 }
243 if (wdev->conn->params.bssid) {
244 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
245 bssid = bssid_buf;
246 }
247 if (cfg80211_conn_do_work(wdev)) {
248 __cfg80211_connect_result(
249 wdev->netdev, bssid,
250 NULL, 0, NULL, 0, -1, false, NULL);
251 }
252 wdev_unlock(wdev);
253 }
254
255 rtnl_unlock();
256}
257
258/* Returned bss is reference counted and must be cleaned up appropriately. */
259static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
260{
261 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
262 struct cfg80211_bss *bss;
263
264 ASSERT_WDEV_LOCK(wdev);
265
266 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
267 wdev->conn->params.bssid,
268 wdev->conn->params.ssid,
269 wdev->conn->params.ssid_len,
270 wdev->conn_bss_type,
271 IEEE80211_PRIVACY(wdev->conn->params.privacy));
272 if (!bss)
273 return NULL;
274
275 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
276 wdev->conn->params.bssid = wdev->conn->bssid;
277 wdev->conn->params.channel = bss->channel;
278 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
279 schedule_work(&rdev->conn_work);
280
281 return bss;
282}
283
284static void __cfg80211_sme_scan_done(struct net_device *dev)
285{
286 struct wireless_dev *wdev = dev->ieee80211_ptr;
287 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
288 struct cfg80211_bss *bss;
289
290 ASSERT_WDEV_LOCK(wdev);
291
292 if (!wdev->conn)
293 return;
294
295 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
296 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
297 return;
298
299 bss = cfg80211_get_conn_bss(wdev);
300 if (bss)
301 cfg80211_put_bss(&rdev->wiphy, bss);
302 else
303 schedule_work(&rdev->conn_work);
304}
305
306void cfg80211_sme_scan_done(struct net_device *dev)
307{
308 struct wireless_dev *wdev = dev->ieee80211_ptr;
309
310 wdev_lock(wdev);
311 __cfg80211_sme_scan_done(dev);
312 wdev_unlock(wdev);
313}
314
315void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
316{
317 struct wiphy *wiphy = wdev->wiphy;
318 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
319 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
320 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
321
322 ASSERT_WDEV_LOCK(wdev);
323
324 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
325 return;
326
327 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
328 wdev->conn->auto_auth &&
329 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
330 /* select automatically between only open, shared, leap */
331 switch (wdev->conn->params.auth_type) {
332 case NL80211_AUTHTYPE_OPEN_SYSTEM:
333 if (wdev->connect_keys)
334 wdev->conn->params.auth_type =
335 NL80211_AUTHTYPE_SHARED_KEY;
336 else
337 wdev->conn->params.auth_type =
338 NL80211_AUTHTYPE_NETWORK_EAP;
339 break;
340 case NL80211_AUTHTYPE_SHARED_KEY:
341 wdev->conn->params.auth_type =
342 NL80211_AUTHTYPE_NETWORK_EAP;
343 break;
344 default:
345 /* huh? */
346 wdev->conn->params.auth_type =
347 NL80211_AUTHTYPE_OPEN_SYSTEM;
348 break;
349 }
350 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
351 schedule_work(&rdev->conn_work);
352 } else if (status_code != WLAN_STATUS_SUCCESS) {
353 __cfg80211_connect_result(wdev->netdev, mgmt->bssid,
354 NULL, 0, NULL, 0,
355 status_code, false, NULL);
356 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
357 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
358 schedule_work(&rdev->conn_work);
359 }
360}
361
362bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
363{
364 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
365
366 if (!wdev->conn)
367 return false;
368
369 if (status == WLAN_STATUS_SUCCESS) {
370 wdev->conn->state = CFG80211_CONN_CONNECTED;
371 return false;
372 }
373
374 if (wdev->conn->prev_bssid_valid) {
375 /*
376 * Some stupid APs don't accept reassoc, so we
377 * need to fall back to trying regular assoc;
378 * return true so no event is sent to userspace.
379 */
380 wdev->conn->prev_bssid_valid = false;
381 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
382 schedule_work(&rdev->conn_work);
383 return true;
384 }
385
386 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
387 schedule_work(&rdev->conn_work);
388 return false;
389}
390
391void cfg80211_sme_deauth(struct wireless_dev *wdev)
392{
393 cfg80211_sme_free(wdev);
394}
395
396void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
397{
398 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
399
400 if (!wdev->conn)
401 return;
402
403 wdev->conn->state = CFG80211_CONN_AUTH_FAILED;
404 schedule_work(&rdev->conn_work);
405}
406
407void cfg80211_sme_disassoc(struct wireless_dev *wdev)
408{
409 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
410
411 if (!wdev->conn)
412 return;
413
414 wdev->conn->state = CFG80211_CONN_DEAUTH;
415 schedule_work(&rdev->conn_work);
416}
417
418void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
419{
420 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
421
422 if (!wdev->conn)
423 return;
424
425 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
426 schedule_work(&rdev->conn_work);
427}
428
429void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
430{
431 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
432
433 if (!wdev->conn)
434 return;
435
436 wdev->conn->state = CFG80211_CONN_ABANDON;
437 schedule_work(&rdev->conn_work);
438}
439
440static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
441 const u8 *ies, size_t ies_len,
442 const u8 **out_ies, size_t *out_ies_len)
443{
444 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
445 u8 *buf;
446 size_t offs;
447
448 if (!rdev->wiphy.extended_capabilities_len ||
449 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
450 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
451 if (!*out_ies)
452 return -ENOMEM;
453 *out_ies_len = ies_len;
454 return 0;
455 }
456
457 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
458 GFP_KERNEL);
459 if (!buf)
460 return -ENOMEM;
461
462 if (ies_len) {
463 static const u8 before_extcapa[] = {
464 /* not listing IEs expected to be created by driver */
465 WLAN_EID_RSN,
466 WLAN_EID_QOS_CAPA,
467 WLAN_EID_RRM_ENABLED_CAPABILITIES,
468 WLAN_EID_MOBILITY_DOMAIN,
469 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
470 WLAN_EID_BSS_COEX_2040,
471 };
472
473 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
474 ARRAY_SIZE(before_extcapa), 0);
475 memcpy(buf, ies, offs);
476 /* leave a whole for extended capabilities IE */
477 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
478 ies + offs, ies_len - offs);
479 } else {
480 offs = 0;
481 }
482
483 /* place extended capabilities IE (with only driver capabilities) */
484 buf[offs] = WLAN_EID_EXT_CAPABILITY;
485 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
486 memcpy(buf + offs + 2,
487 rdev->wiphy.extended_capabilities,
488 rdev->wiphy.extended_capabilities_len);
489
490 *out_ies = buf;
491 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
492
493 return 0;
494}
495
496static int cfg80211_sme_connect(struct wireless_dev *wdev,
497 struct cfg80211_connect_params *connect,
498 const u8 *prev_bssid)
499{
500 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
501 struct cfg80211_bss *bss;
502 int err;
503
504 if (!rdev->ops->auth || !rdev->ops->assoc)
505 return -EOPNOTSUPP;
506
507 if (wdev->current_bss) {
508 if (!prev_bssid)
509 return -EALREADY;
510 if (prev_bssid &&
511 !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
512 return -ENOTCONN;
513 cfg80211_unhold_bss(wdev->current_bss);
514 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
515 wdev->current_bss = NULL;
516
517 cfg80211_sme_free(wdev);
518 }
519
520 if (WARN_ON(wdev->conn))
521 return -EINPROGRESS;
522
523 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
524 if (!wdev->conn)
525 return -ENOMEM;
526
527 /*
528 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
529 */
530 memcpy(&wdev->conn->params, connect, sizeof(*connect));
531 if (connect->bssid) {
532 wdev->conn->params.bssid = wdev->conn->bssid;
533 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
534 }
535
536 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
537 &wdev->conn->ie,
538 &wdev->conn->params.ie_len)) {
539 kfree(wdev->conn);
540 wdev->conn = NULL;
541 return -ENOMEM;
542 }
543 wdev->conn->params.ie = wdev->conn->ie;
544
545 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
546 wdev->conn->auto_auth = true;
547 /* start with open system ... should mostly work */
548 wdev->conn->params.auth_type =
549 NL80211_AUTHTYPE_OPEN_SYSTEM;
550 } else {
551 wdev->conn->auto_auth = false;
552 }
553
554 wdev->conn->params.ssid = wdev->ssid;
555 wdev->conn->params.ssid_len = wdev->ssid_len;
556
557 /* see if we have the bss already */
558 bss = cfg80211_get_conn_bss(wdev);
559
560 if (prev_bssid) {
561 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
562 wdev->conn->prev_bssid_valid = true;
563 }
564
565 /* we're good if we have a matching bss struct */
566 if (bss) {
567 err = cfg80211_conn_do_work(wdev);
568 cfg80211_put_bss(wdev->wiphy, bss);
569 } else {
570 /* otherwise we'll need to scan for the AP first */
571 err = cfg80211_conn_scan(wdev);
572
573 /*
574 * If we can't scan right now, then we need to scan again
575 * after the current scan finished, since the parameters
576 * changed (unless we find a good AP anyway).
577 */
578 if (err == -EBUSY) {
579 err = 0;
580 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
581 }
582 }
583
584 if (err)
585 cfg80211_sme_free(wdev);
586
587 return err;
588}
589
590static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
591{
592 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
593 int err;
594
595 if (!wdev->conn)
596 return 0;
597
598 if (!rdev->ops->deauth)
599 return -EOPNOTSUPP;
600
601 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
602 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
603 err = 0;
604 goto out;
605 }
606
607 /* wdev->conn->params.bssid must be set if > SCANNING */
608 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
609 wdev->conn->params.bssid,
610 NULL, 0, reason, false);
611 out:
612 cfg80211_sme_free(wdev);
613 return err;
614}
615
616/*
617 * code shared for in-device and software SME
618 */
619
620static bool cfg80211_is_all_idle(void)
621{
622 struct cfg80211_registered_device *rdev;
623 struct wireless_dev *wdev;
624 bool is_all_idle = true;
625
626 /*
627 * All devices must be idle as otherwise if you are actively
628 * scanning some new beacon hints could be learned and would
629 * count as new regulatory hints.
630 */
631 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
632 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
633 wdev_lock(wdev);
634 if (wdev->conn || wdev->current_bss)
635 is_all_idle = false;
636 wdev_unlock(wdev);
637 }
638 }
639
640 return is_all_idle;
641}
642
643static void disconnect_work(struct work_struct *work)
644{
645 rtnl_lock();
646 if (cfg80211_is_all_idle())
647 regulatory_hint_disconnect();
648 rtnl_unlock();
649}
650
651static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
652
653
654/*
655 * API calls for drivers implementing connect/disconnect and
656 * SME event handling
657 */
658
659/* This method must consume bss one way or another */
660void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
661 const u8 *req_ie, size_t req_ie_len,
662 const u8 *resp_ie, size_t resp_ie_len,
663 int status, bool wextev,
664 struct cfg80211_bss *bss)
665{
666 struct wireless_dev *wdev = dev->ieee80211_ptr;
667 const u8 *country_ie;
668#ifdef CONFIG_CFG80211_WEXT
669 union iwreq_data wrqu;
670#endif
671
672 ASSERT_WDEV_LOCK(wdev);
673
674 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
675 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
676 cfg80211_put_bss(wdev->wiphy, bss);
677 return;
678 }
679
680 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev,
681 bssid, req_ie, req_ie_len,
682 resp_ie, resp_ie_len,
683 status, GFP_KERNEL);
684
685#ifdef CONFIG_CFG80211_WEXT
686 if (wextev) {
687 if (req_ie && status == WLAN_STATUS_SUCCESS) {
688 memset(&wrqu, 0, sizeof(wrqu));
689 wrqu.data.length = req_ie_len;
690 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
691 }
692
693 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
694 memset(&wrqu, 0, sizeof(wrqu));
695 wrqu.data.length = resp_ie_len;
696 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
697 }
698
699 memset(&wrqu, 0, sizeof(wrqu));
700 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
701 if (bssid && status == WLAN_STATUS_SUCCESS) {
702 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
703 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
704 wdev->wext.prev_bssid_valid = true;
705 }
706 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
707 }
708#endif
709
710 if (!bss && (status == WLAN_STATUS_SUCCESS)) {
711 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
712 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
713 wdev->ssid, wdev->ssid_len,
714 wdev->conn_bss_type,
715 IEEE80211_PRIVACY_ANY);
716 if (bss)
717 cfg80211_hold_bss(bss_from_pub(bss));
718 }
719
720 if (wdev->current_bss) {
721 cfg80211_unhold_bss(wdev->current_bss);
722 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
723 wdev->current_bss = NULL;
724 }
725
726 if (status != WLAN_STATUS_SUCCESS) {
727 kzfree(wdev->connect_keys);
728 wdev->connect_keys = NULL;
729 wdev->ssid_len = 0;
730 if (bss) {
731 cfg80211_unhold_bss(bss_from_pub(bss));
732 cfg80211_put_bss(wdev->wiphy, bss);
733 }
734 cfg80211_sme_free(wdev);
735 return;
736 }
737
738 if (WARN_ON(!bss))
739 return;
740
741 wdev->current_bss = bss_from_pub(bss);
742
743 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
744 cfg80211_upload_connect_keys(wdev);
745
746 rcu_read_lock();
747 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
748 if (!country_ie) {
749 rcu_read_unlock();
750 return;
751 }
752
753 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
754 rcu_read_unlock();
755
756 if (!country_ie)
757 return;
758
759 /*
760 * ieee80211_bss_get_ie() ensures we can access:
761 * - country_ie + 2, the start of the country ie data, and
762 * - and country_ie[1] which is the IE length
763 */
764 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
765 country_ie + 2, country_ie[1]);
766 kfree(country_ie);
767}
768
769/* Consumes bss object one way or another */
770void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid,
771 struct cfg80211_bss *bss, const u8 *req_ie,
772 size_t req_ie_len, const u8 *resp_ie,
773 size_t resp_ie_len, int status, gfp_t gfp)
774{
775 struct wireless_dev *wdev = dev->ieee80211_ptr;
776 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
777 struct cfg80211_event *ev;
778 unsigned long flags;
779
780 if (bss) {
781 /* Make sure the bss entry provided by the driver is valid. */
782 struct cfg80211_internal_bss *ibss = bss_from_pub(bss);
783
784 if (WARN_ON(list_empty(&ibss->list))) {
785 cfg80211_put_bss(wdev->wiphy, bss);
786 return;
787 }
788 }
789
790 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
791 if (!ev) {
792 cfg80211_put_bss(wdev->wiphy, bss);
793 return;
794 }
795
796 ev->type = EVENT_CONNECT_RESULT;
797 if (bssid)
798 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
799 if (req_ie_len) {
800 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
801 ev->cr.req_ie_len = req_ie_len;
802 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
803 }
804 if (resp_ie_len) {
805 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
806 ev->cr.resp_ie_len = resp_ie_len;
807 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
808 }
809 if (bss)
810 cfg80211_hold_bss(bss_from_pub(bss));
811 ev->cr.bss = bss;
812 ev->cr.status = status;
813
814 spin_lock_irqsave(&wdev->event_lock, flags);
815 list_add_tail(&ev->list, &wdev->event_list);
816 spin_unlock_irqrestore(&wdev->event_lock, flags);
817 queue_work(cfg80211_wq, &rdev->event_work);
818}
819EXPORT_SYMBOL(cfg80211_connect_bss);
820
821/* Consumes bss object one way or another */
822void __cfg80211_roamed(struct wireless_dev *wdev,
823 struct cfg80211_bss *bss,
824 const u8 *req_ie, size_t req_ie_len,
825 const u8 *resp_ie, size_t resp_ie_len)
826{
827#ifdef CONFIG_CFG80211_WEXT
828 union iwreq_data wrqu;
829#endif
830 ASSERT_WDEV_LOCK(wdev);
831
832 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
833 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
834 goto out;
835
836 if (WARN_ON(!wdev->current_bss))
837 goto out;
838
839 cfg80211_unhold_bss(wdev->current_bss);
840 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
841 wdev->current_bss = NULL;
842
843 cfg80211_hold_bss(bss_from_pub(bss));
844 wdev->current_bss = bss_from_pub(bss);
845
846 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
847 wdev->netdev, bss->bssid,
848 req_ie, req_ie_len, resp_ie, resp_ie_len,
849 GFP_KERNEL);
850
851#ifdef CONFIG_CFG80211_WEXT
852 if (req_ie) {
853 memset(&wrqu, 0, sizeof(wrqu));
854 wrqu.data.length = req_ie_len;
855 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
856 &wrqu, req_ie);
857 }
858
859 if (resp_ie) {
860 memset(&wrqu, 0, sizeof(wrqu));
861 wrqu.data.length = resp_ie_len;
862 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
863 &wrqu, resp_ie);
864 }
865
866 memset(&wrqu, 0, sizeof(wrqu));
867 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
868 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
869 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
870 wdev->wext.prev_bssid_valid = true;
871 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
872#endif
873
874 return;
875out:
876 cfg80211_put_bss(wdev->wiphy, bss);
877}
878
879void cfg80211_roamed(struct net_device *dev,
880 struct ieee80211_channel *channel,
881 const u8 *bssid,
882 const u8 *req_ie, size_t req_ie_len,
883 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
884{
885 struct wireless_dev *wdev = dev->ieee80211_ptr;
886 struct cfg80211_bss *bss;
887
888 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
889 wdev->ssid_len,
890 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY);
891 if (WARN_ON(!bss))
892 return;
893
894 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
895 resp_ie_len, gfp);
896}
897EXPORT_SYMBOL(cfg80211_roamed);
898
899/* Consumes bss object one way or another */
900void cfg80211_roamed_bss(struct net_device *dev,
901 struct cfg80211_bss *bss, const u8 *req_ie,
902 size_t req_ie_len, const u8 *resp_ie,
903 size_t resp_ie_len, gfp_t gfp)
904{
905 struct wireless_dev *wdev = dev->ieee80211_ptr;
906 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
907 struct cfg80211_event *ev;
908 unsigned long flags;
909
910 if (WARN_ON(!bss))
911 return;
912
913 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
914 if (!ev) {
915 cfg80211_put_bss(wdev->wiphy, bss);
916 return;
917 }
918
919 ev->type = EVENT_ROAMED;
920 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
921 ev->rm.req_ie_len = req_ie_len;
922 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
923 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
924 ev->rm.resp_ie_len = resp_ie_len;
925 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
926 ev->rm.bss = bss;
927
928 spin_lock_irqsave(&wdev->event_lock, flags);
929 list_add_tail(&ev->list, &wdev->event_list);
930 spin_unlock_irqrestore(&wdev->event_lock, flags);
931 queue_work(cfg80211_wq, &rdev->event_work);
932}
933EXPORT_SYMBOL(cfg80211_roamed_bss);
934
935void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
936 size_t ie_len, u16 reason, bool from_ap)
937{
938 struct wireless_dev *wdev = dev->ieee80211_ptr;
939 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
940 int i;
941#ifdef CONFIG_CFG80211_WEXT
942 union iwreq_data wrqu;
943#endif
944
945 ASSERT_WDEV_LOCK(wdev);
946
947 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
948 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
949 return;
950
951 if (wdev->current_bss) {
952 cfg80211_unhold_bss(wdev->current_bss);
953 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
954 }
955
956 wdev->current_bss = NULL;
957 wdev->ssid_len = 0;
958
959 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
960
961 /* stop critical protocol if supported */
962 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
963 rdev->crit_proto_nlportid = 0;
964 rdev_crit_proto_stop(rdev, wdev);
965 }
966
967 /*
968 * Delete all the keys ... pairwise keys can't really
969 * exist any more anyway, but default keys might.
970 */
971 if (rdev->ops->del_key)
972 for (i = 0; i < 6; i++)
973 rdev_del_key(rdev, dev, i, false, NULL);
974
975 rdev_set_qos_map(rdev, dev, NULL);
976
977#ifdef CONFIG_CFG80211_WEXT
978 memset(&wrqu, 0, sizeof(wrqu));
979 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
980 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
981 wdev->wext.connect.ssid_len = 0;
982#endif
983
984 schedule_work(&cfg80211_disconnect_work);
985}
986
987void cfg80211_disconnected(struct net_device *dev, u16 reason,
988 const u8 *ie, size_t ie_len,
989 bool locally_generated, gfp_t gfp)
990{
991 struct wireless_dev *wdev = dev->ieee80211_ptr;
992 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
993 struct cfg80211_event *ev;
994 unsigned long flags;
995
996 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
997 if (!ev)
998 return;
999
1000 ev->type = EVENT_DISCONNECTED;
1001 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1002 ev->dc.ie_len = ie_len;
1003 memcpy((void *)ev->dc.ie, ie, ie_len);
1004 ev->dc.reason = reason;
1005 ev->dc.locally_generated = locally_generated;
1006
1007 spin_lock_irqsave(&wdev->event_lock, flags);
1008 list_add_tail(&ev->list, &wdev->event_list);
1009 spin_unlock_irqrestore(&wdev->event_lock, flags);
1010 queue_work(cfg80211_wq, &rdev->event_work);
1011}
1012EXPORT_SYMBOL(cfg80211_disconnected);
1013
1014/*
1015 * API calls for nl80211/wext compatibility code
1016 */
1017int cfg80211_connect(struct cfg80211_registered_device *rdev,
1018 struct net_device *dev,
1019 struct cfg80211_connect_params *connect,
1020 struct cfg80211_cached_keys *connkeys,
1021 const u8 *prev_bssid)
1022{
1023 struct wireless_dev *wdev = dev->ieee80211_ptr;
1024 int err;
1025
1026 ASSERT_WDEV_LOCK(wdev);
1027
1028 if (WARN_ON(wdev->connect_keys)) {
1029 kzfree(wdev->connect_keys);
1030 wdev->connect_keys = NULL;
1031 }
1032
1033 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1034 rdev->wiphy.ht_capa_mod_mask);
1035
1036 if (connkeys && connkeys->def >= 0) {
1037 int idx;
1038 u32 cipher;
1039
1040 idx = connkeys->def;
1041 cipher = connkeys->params[idx].cipher;
1042 /* If given a WEP key we may need it for shared key auth */
1043 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1044 cipher == WLAN_CIPHER_SUITE_WEP104) {
1045 connect->key_idx = idx;
1046 connect->key = connkeys->params[idx].key;
1047 connect->key_len = connkeys->params[idx].key_len;
1048
1049 /*
1050 * If ciphers are not set (e.g. when going through
1051 * iwconfig), we have to set them appropriately here.
1052 */
1053 if (connect->crypto.cipher_group == 0)
1054 connect->crypto.cipher_group = cipher;
1055
1056 if (connect->crypto.n_ciphers_pairwise == 0) {
1057 connect->crypto.n_ciphers_pairwise = 1;
1058 connect->crypto.ciphers_pairwise[0] = cipher;
1059 }
1060 }
1061
1062 connect->crypto.wep_keys = connkeys->params;
1063 connect->crypto.wep_tx_key = connkeys->def;
1064 } else {
1065 if (WARN_ON(connkeys))
1066 return -EINVAL;
1067 }
1068
1069 wdev->connect_keys = connkeys;
1070 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1071 wdev->ssid_len = connect->ssid_len;
1072
1073 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1074 IEEE80211_BSS_TYPE_ESS;
1075
1076 if (!rdev->ops->connect)
1077 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1078 else
1079 err = rdev_connect(rdev, dev, connect);
1080
1081 if (err) {
1082 wdev->connect_keys = NULL;
1083 wdev->ssid_len = 0;
1084 return err;
1085 }
1086
1087 return 0;
1088}
1089
1090int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1091 struct net_device *dev, u16 reason, bool wextev)
1092{
1093 struct wireless_dev *wdev = dev->ieee80211_ptr;
1094 int err = 0;
1095
1096 ASSERT_WDEV_LOCK(wdev);
1097
1098 kzfree(wdev->connect_keys);
1099 wdev->connect_keys = NULL;
1100
1101 if (wdev->conn)
1102 err = cfg80211_sme_disconnect(wdev, reason);
1103 else if (!rdev->ops->disconnect)
1104 cfg80211_mlme_down(rdev, dev);
1105 else if (wdev->ssid_len)
1106 err = rdev_disconnect(rdev, dev, reason);
1107
1108 return err;
1109}