Loading...
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 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 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 ASSERT_RTNL();
71 ASSERT_WDEV_LOCK(wdev);
72
73 if (rdev->scan_req || rdev->scan_msg)
74 return -EBUSY;
75
76 if (wdev->conn->params.channel)
77 n_channels = 1;
78 else
79 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
80
81 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
82 sizeof(request->channels[0]) * n_channels,
83 GFP_KERNEL);
84 if (!request)
85 return -ENOMEM;
86
87 if (wdev->conn->params.channel) {
88 enum nl80211_band band = wdev->conn->params.channel->band;
89 struct ieee80211_supported_band *sband =
90 wdev->wiphy->bands[band];
91
92 if (!sband) {
93 kfree(request);
94 return -EINVAL;
95 }
96 request->channels[0] = wdev->conn->params.channel;
97 request->rates[band] = (1 << sband->n_bitrates) - 1;
98 } else {
99 int i = 0, j;
100 enum nl80211_band band;
101 struct ieee80211_supported_band *bands;
102 struct ieee80211_channel *channel;
103
104 for (band = 0; band < NUM_NL80211_BANDS; band++) {
105 bands = wdev->wiphy->bands[band];
106 if (!bands)
107 continue;
108 for (j = 0; j < bands->n_channels; j++) {
109 channel = &bands->channels[j];
110 if (channel->flags & IEEE80211_CHAN_DISABLED)
111 continue;
112 request->channels[i++] = channel;
113 }
114 request->rates[band] = (1 << bands->n_bitrates) - 1;
115 }
116 n_channels = i;
117 }
118 request->n_channels = n_channels;
119 request->ssids = (void *)&request->channels[n_channels];
120 request->n_ssids = 1;
121
122 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
123 wdev->conn->params.ssid_len);
124 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
125
126 eth_broadcast_addr(request->bssid);
127
128 request->wdev = wdev;
129 request->wiphy = &rdev->wiphy;
130 request->scan_start = jiffies;
131
132 rdev->scan_req = request;
133
134 err = rdev_scan(rdev, request);
135 if (!err) {
136 wdev->conn->state = CFG80211_CONN_SCANNING;
137 nl80211_send_scan_start(rdev, wdev);
138 dev_hold(wdev->netdev);
139 } else {
140 rdev->scan_req = NULL;
141 kfree(request);
142 }
143 return err;
144}
145
146static int cfg80211_conn_do_work(struct wireless_dev *wdev,
147 enum nl80211_timeout_reason *treason)
148{
149 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
150 struct cfg80211_connect_params *params;
151 struct cfg80211_assoc_request req = {};
152 int err;
153
154 ASSERT_WDEV_LOCK(wdev);
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 return cfg80211_mlme_auth(rdev, wdev->netdev,
172 params->channel, params->auth_type,
173 params->bssid,
174 params->ssid, params->ssid_len,
175 NULL, 0,
176 params->key, params->key_len,
177 params->key_idx, NULL, 0);
178 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
179 *treason = NL80211_TIMEOUT_AUTH;
180 return -ENOTCONN;
181 case CFG80211_CONN_ASSOCIATE_NEXT:
182 if (WARN_ON(!rdev->ops->assoc))
183 return -EOPNOTSUPP;
184 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
185 if (wdev->conn->prev_bssid_valid)
186 req.prev_bssid = wdev->conn->prev_bssid;
187 req.ie = params->ie;
188 req.ie_len = params->ie_len;
189 req.use_mfp = params->mfp != NL80211_MFP_NO;
190 req.crypto = params->crypto;
191 req.flags = params->flags;
192 req.ht_capa = params->ht_capa;
193 req.ht_capa_mask = params->ht_capa_mask;
194 req.vht_capa = params->vht_capa;
195 req.vht_capa_mask = params->vht_capa_mask;
196
197 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
198 params->bssid, params->ssid,
199 params->ssid_len, &req);
200 if (err)
201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
202 NULL, 0,
203 WLAN_REASON_DEAUTH_LEAVING,
204 false);
205 return err;
206 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
207 *treason = NL80211_TIMEOUT_ASSOC;
208 /* fall through */
209 case CFG80211_CONN_ASSOC_FAILED:
210 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
211 NULL, 0,
212 WLAN_REASON_DEAUTH_LEAVING, false);
213 return -ENOTCONN;
214 case CFG80211_CONN_DEAUTH:
215 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
216 NULL, 0,
217 WLAN_REASON_DEAUTH_LEAVING, false);
218 /* fall through */
219 case CFG80211_CONN_ABANDON:
220 /* free directly, disconnected event already sent */
221 cfg80211_sme_free(wdev);
222 return 0;
223 default:
224 return 0;
225 }
226}
227
228void cfg80211_conn_work(struct work_struct *work)
229{
230 struct cfg80211_registered_device *rdev =
231 container_of(work, struct cfg80211_registered_device, conn_work);
232 struct wireless_dev *wdev;
233 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
234 enum nl80211_timeout_reason treason;
235
236 rtnl_lock();
237
238 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
239 if (!wdev->netdev)
240 continue;
241
242 wdev_lock(wdev);
243 if (!netif_running(wdev->netdev)) {
244 wdev_unlock(wdev);
245 continue;
246 }
247 if (!wdev->conn ||
248 wdev->conn->state == CFG80211_CONN_CONNECTED) {
249 wdev_unlock(wdev);
250 continue;
251 }
252 if (wdev->conn->params.bssid) {
253 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
254 bssid = bssid_buf;
255 }
256 treason = NL80211_TIMEOUT_UNSPECIFIED;
257 if (cfg80211_conn_do_work(wdev, &treason)) {
258 struct cfg80211_connect_resp_params cr;
259
260 memset(&cr, 0, sizeof(cr));
261 cr.status = -1;
262 cr.bssid = bssid;
263 cr.timeout_reason = treason;
264 __cfg80211_connect_result(wdev->netdev, &cr, false);
265 }
266 wdev_unlock(wdev);
267 }
268
269 rtnl_unlock();
270}
271
272/* Returned bss is reference counted and must be cleaned up appropriately. */
273static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
274{
275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
276 struct cfg80211_bss *bss;
277
278 ASSERT_WDEV_LOCK(wdev);
279
280 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
281 wdev->conn->params.bssid,
282 wdev->conn->params.ssid,
283 wdev->conn->params.ssid_len,
284 wdev->conn_bss_type,
285 IEEE80211_PRIVACY(wdev->conn->params.privacy));
286 if (!bss)
287 return NULL;
288
289 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
290 wdev->conn->params.bssid = wdev->conn->bssid;
291 wdev->conn->params.channel = bss->channel;
292 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
293 schedule_work(&rdev->conn_work);
294
295 return bss;
296}
297
298static void __cfg80211_sme_scan_done(struct net_device *dev)
299{
300 struct wireless_dev *wdev = dev->ieee80211_ptr;
301 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
302 struct cfg80211_bss *bss;
303
304 ASSERT_WDEV_LOCK(wdev);
305
306 if (!wdev->conn)
307 return;
308
309 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
310 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
311 return;
312
313 bss = cfg80211_get_conn_bss(wdev);
314 if (bss)
315 cfg80211_put_bss(&rdev->wiphy, bss);
316 else
317 schedule_work(&rdev->conn_work);
318}
319
320void cfg80211_sme_scan_done(struct net_device *dev)
321{
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
323
324 wdev_lock(wdev);
325 __cfg80211_sme_scan_done(dev);
326 wdev_unlock(wdev);
327}
328
329void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
330{
331 struct wiphy *wiphy = wdev->wiphy;
332 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
333 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
334 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
335
336 ASSERT_WDEV_LOCK(wdev);
337
338 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
339 return;
340
341 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
342 wdev->conn->auto_auth &&
343 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
344 /* select automatically between only open, shared, leap */
345 switch (wdev->conn->params.auth_type) {
346 case NL80211_AUTHTYPE_OPEN_SYSTEM:
347 if (wdev->connect_keys)
348 wdev->conn->params.auth_type =
349 NL80211_AUTHTYPE_SHARED_KEY;
350 else
351 wdev->conn->params.auth_type =
352 NL80211_AUTHTYPE_NETWORK_EAP;
353 break;
354 case NL80211_AUTHTYPE_SHARED_KEY:
355 wdev->conn->params.auth_type =
356 NL80211_AUTHTYPE_NETWORK_EAP;
357 break;
358 default:
359 /* huh? */
360 wdev->conn->params.auth_type =
361 NL80211_AUTHTYPE_OPEN_SYSTEM;
362 break;
363 }
364 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
365 schedule_work(&rdev->conn_work);
366 } else if (status_code != WLAN_STATUS_SUCCESS) {
367 struct cfg80211_connect_resp_params cr;
368
369 memset(&cr, 0, sizeof(cr));
370 cr.status = status_code;
371 cr.bssid = mgmt->bssid;
372 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
373 __cfg80211_connect_result(wdev->netdev, &cr, false);
374 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
375 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
376 schedule_work(&rdev->conn_work);
377 }
378}
379
380bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
381{
382 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
383
384 if (!wdev->conn)
385 return false;
386
387 if (status == WLAN_STATUS_SUCCESS) {
388 wdev->conn->state = CFG80211_CONN_CONNECTED;
389 return false;
390 }
391
392 if (wdev->conn->prev_bssid_valid) {
393 /*
394 * Some stupid APs don't accept reassoc, so we
395 * need to fall back to trying regular assoc;
396 * return true so no event is sent to userspace.
397 */
398 wdev->conn->prev_bssid_valid = false;
399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
400 schedule_work(&rdev->conn_work);
401 return true;
402 }
403
404 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
405 schedule_work(&rdev->conn_work);
406 return false;
407}
408
409void cfg80211_sme_deauth(struct wireless_dev *wdev)
410{
411 cfg80211_sme_free(wdev);
412}
413
414void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
415{
416 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
417
418 if (!wdev->conn)
419 return;
420
421 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
422 schedule_work(&rdev->conn_work);
423}
424
425void cfg80211_sme_disassoc(struct wireless_dev *wdev)
426{
427 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
428
429 if (!wdev->conn)
430 return;
431
432 wdev->conn->state = CFG80211_CONN_DEAUTH;
433 schedule_work(&rdev->conn_work);
434}
435
436void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
437{
438 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
439
440 if (!wdev->conn)
441 return;
442
443 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
444 schedule_work(&rdev->conn_work);
445}
446
447void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
448{
449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
450
451 if (!wdev->conn)
452 return;
453
454 wdev->conn->state = CFG80211_CONN_ABANDON;
455 schedule_work(&rdev->conn_work);
456}
457
458static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
459 const u8 *ies, size_t ies_len,
460 const u8 **out_ies, size_t *out_ies_len)
461{
462 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
463 u8 *buf;
464 size_t offs;
465
466 if (!rdev->wiphy.extended_capabilities_len ||
467 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
468 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
469 if (!*out_ies)
470 return -ENOMEM;
471 *out_ies_len = ies_len;
472 return 0;
473 }
474
475 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
476 GFP_KERNEL);
477 if (!buf)
478 return -ENOMEM;
479
480 if (ies_len) {
481 static const u8 before_extcapa[] = {
482 /* not listing IEs expected to be created by driver */
483 WLAN_EID_RSN,
484 WLAN_EID_QOS_CAPA,
485 WLAN_EID_RRM_ENABLED_CAPABILITIES,
486 WLAN_EID_MOBILITY_DOMAIN,
487 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
488 WLAN_EID_BSS_COEX_2040,
489 };
490
491 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
492 ARRAY_SIZE(before_extcapa), 0);
493 memcpy(buf, ies, offs);
494 /* leave a whole for extended capabilities IE */
495 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
496 ies + offs, ies_len - offs);
497 } else {
498 offs = 0;
499 }
500
501 /* place extended capabilities IE (with only driver capabilities) */
502 buf[offs] = WLAN_EID_EXT_CAPABILITY;
503 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
504 memcpy(buf + offs + 2,
505 rdev->wiphy.extended_capabilities,
506 rdev->wiphy.extended_capabilities_len);
507
508 *out_ies = buf;
509 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
510
511 return 0;
512}
513
514static int cfg80211_sme_connect(struct wireless_dev *wdev,
515 struct cfg80211_connect_params *connect,
516 const u8 *prev_bssid)
517{
518 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
519 struct cfg80211_bss *bss;
520 int err;
521
522 if (!rdev->ops->auth || !rdev->ops->assoc)
523 return -EOPNOTSUPP;
524
525 if (wdev->current_bss) {
526 cfg80211_unhold_bss(wdev->current_bss);
527 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
528 wdev->current_bss = NULL;
529
530 cfg80211_sme_free(wdev);
531 }
532
533 if (WARN_ON(wdev->conn))
534 return -EINPROGRESS;
535
536 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
537 if (!wdev->conn)
538 return -ENOMEM;
539
540 /*
541 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
542 */
543 memcpy(&wdev->conn->params, connect, sizeof(*connect));
544 if (connect->bssid) {
545 wdev->conn->params.bssid = wdev->conn->bssid;
546 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
547 }
548
549 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
550 &wdev->conn->ie,
551 &wdev->conn->params.ie_len)) {
552 kfree(wdev->conn);
553 wdev->conn = NULL;
554 return -ENOMEM;
555 }
556 wdev->conn->params.ie = wdev->conn->ie;
557
558 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
559 wdev->conn->auto_auth = true;
560 /* start with open system ... should mostly work */
561 wdev->conn->params.auth_type =
562 NL80211_AUTHTYPE_OPEN_SYSTEM;
563 } else {
564 wdev->conn->auto_auth = false;
565 }
566
567 wdev->conn->params.ssid = wdev->ssid;
568 wdev->conn->params.ssid_len = wdev->ssid_len;
569
570 /* see if we have the bss already */
571 bss = cfg80211_get_conn_bss(wdev);
572
573 if (prev_bssid) {
574 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
575 wdev->conn->prev_bssid_valid = true;
576 }
577
578 /* we're good if we have a matching bss struct */
579 if (bss) {
580 enum nl80211_timeout_reason treason;
581
582 err = cfg80211_conn_do_work(wdev, &treason);
583 cfg80211_put_bss(wdev->wiphy, bss);
584 } else {
585 /* otherwise we'll need to scan for the AP first */
586 err = cfg80211_conn_scan(wdev);
587
588 /*
589 * If we can't scan right now, then we need to scan again
590 * after the current scan finished, since the parameters
591 * changed (unless we find a good AP anyway).
592 */
593 if (err == -EBUSY) {
594 err = 0;
595 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
596 }
597 }
598
599 if (err)
600 cfg80211_sme_free(wdev);
601
602 return err;
603}
604
605static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
606{
607 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
608 int err;
609
610 if (!wdev->conn)
611 return 0;
612
613 if (!rdev->ops->deauth)
614 return -EOPNOTSUPP;
615
616 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
617 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
618 err = 0;
619 goto out;
620 }
621
622 /* wdev->conn->params.bssid must be set if > SCANNING */
623 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
624 wdev->conn->params.bssid,
625 NULL, 0, reason, false);
626 out:
627 cfg80211_sme_free(wdev);
628 return err;
629}
630
631/*
632 * code shared for in-device and software SME
633 */
634
635static bool cfg80211_is_all_idle(void)
636{
637 struct cfg80211_registered_device *rdev;
638 struct wireless_dev *wdev;
639 bool is_all_idle = true;
640
641 /*
642 * All devices must be idle as otherwise if you are actively
643 * scanning some new beacon hints could be learned and would
644 * count as new regulatory hints.
645 */
646 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
647 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
648 wdev_lock(wdev);
649 if (wdev->conn || wdev->current_bss)
650 is_all_idle = false;
651 wdev_unlock(wdev);
652 }
653 }
654
655 return is_all_idle;
656}
657
658static void disconnect_work(struct work_struct *work)
659{
660 rtnl_lock();
661 if (cfg80211_is_all_idle())
662 regulatory_hint_disconnect();
663 rtnl_unlock();
664}
665
666static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
667
668
669/*
670 * API calls for drivers implementing connect/disconnect and
671 * SME event handling
672 */
673
674/* This method must consume bss one way or another */
675void __cfg80211_connect_result(struct net_device *dev,
676 struct cfg80211_connect_resp_params *cr,
677 bool wextev)
678{
679 struct wireless_dev *wdev = dev->ieee80211_ptr;
680 const u8 *country_ie;
681#ifdef CONFIG_CFG80211_WEXT
682 union iwreq_data wrqu;
683#endif
684
685 ASSERT_WDEV_LOCK(wdev);
686
687 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
688 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
689 cfg80211_put_bss(wdev->wiphy, cr->bss);
690 return;
691 }
692
693 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
694 GFP_KERNEL);
695
696#ifdef CONFIG_CFG80211_WEXT
697 if (wextev) {
698 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
699 memset(&wrqu, 0, sizeof(wrqu));
700 wrqu.data.length = cr->req_ie_len;
701 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
702 cr->req_ie);
703 }
704
705 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
706 memset(&wrqu, 0, sizeof(wrqu));
707 wrqu.data.length = cr->resp_ie_len;
708 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
709 cr->resp_ie);
710 }
711
712 memset(&wrqu, 0, sizeof(wrqu));
713 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
714 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
715 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
716 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
717 wdev->wext.prev_bssid_valid = true;
718 }
719 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
720 }
721#endif
722
723 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
724 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
725 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
726 wdev->ssid, wdev->ssid_len,
727 wdev->conn_bss_type,
728 IEEE80211_PRIVACY_ANY);
729 if (cr->bss)
730 cfg80211_hold_bss(bss_from_pub(cr->bss));
731 }
732
733 if (wdev->current_bss) {
734 cfg80211_unhold_bss(wdev->current_bss);
735 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
736 wdev->current_bss = NULL;
737 }
738
739 if (cr->status != WLAN_STATUS_SUCCESS) {
740 kzfree(wdev->connect_keys);
741 wdev->connect_keys = NULL;
742 wdev->ssid_len = 0;
743 wdev->conn_owner_nlportid = 0;
744 if (cr->bss) {
745 cfg80211_unhold_bss(bss_from_pub(cr->bss));
746 cfg80211_put_bss(wdev->wiphy, cr->bss);
747 }
748 cfg80211_sme_free(wdev);
749 return;
750 }
751
752 if (WARN_ON(!cr->bss))
753 return;
754
755 wdev->current_bss = bss_from_pub(cr->bss);
756
757 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
758 cfg80211_upload_connect_keys(wdev);
759
760 rcu_read_lock();
761 country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
762 if (!country_ie) {
763 rcu_read_unlock();
764 return;
765 }
766
767 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
768 rcu_read_unlock();
769
770 if (!country_ie)
771 return;
772
773 /*
774 * ieee80211_bss_get_ie() ensures we can access:
775 * - country_ie + 2, the start of the country ie data, and
776 * - and country_ie[1] which is the IE length
777 */
778 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
779 country_ie + 2, country_ie[1]);
780 kfree(country_ie);
781}
782
783/* Consumes bss object one way or another */
784void cfg80211_connect_done(struct net_device *dev,
785 struct cfg80211_connect_resp_params *params,
786 gfp_t gfp)
787{
788 struct wireless_dev *wdev = dev->ieee80211_ptr;
789 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
790 struct cfg80211_event *ev;
791 unsigned long flags;
792 u8 *next;
793
794 if (params->bss) {
795 /* Make sure the bss entry provided by the driver is valid. */
796 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
797
798 if (WARN_ON(list_empty(&ibss->list))) {
799 cfg80211_put_bss(wdev->wiphy, params->bss);
800 return;
801 }
802 }
803
804 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
805 params->req_ie_len + params->resp_ie_len +
806 params->fils_kek_len + params->pmk_len +
807 (params->pmkid ? WLAN_PMKID_LEN : 0), gfp);
808 if (!ev) {
809 cfg80211_put_bss(wdev->wiphy, params->bss);
810 return;
811 }
812
813 ev->type = EVENT_CONNECT_RESULT;
814 next = ((u8 *)ev) + sizeof(*ev);
815 if (params->bssid) {
816 ev->cr.bssid = next;
817 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
818 next += ETH_ALEN;
819 }
820 if (params->req_ie_len) {
821 ev->cr.req_ie = next;
822 ev->cr.req_ie_len = params->req_ie_len;
823 memcpy((void *)ev->cr.req_ie, params->req_ie,
824 params->req_ie_len);
825 next += params->req_ie_len;
826 }
827 if (params->resp_ie_len) {
828 ev->cr.resp_ie = next;
829 ev->cr.resp_ie_len = params->resp_ie_len;
830 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
831 params->resp_ie_len);
832 next += params->resp_ie_len;
833 }
834 if (params->fils_kek_len) {
835 ev->cr.fils_kek = next;
836 ev->cr.fils_kek_len = params->fils_kek_len;
837 memcpy((void *)ev->cr.fils_kek, params->fils_kek,
838 params->fils_kek_len);
839 next += params->fils_kek_len;
840 }
841 if (params->pmk_len) {
842 ev->cr.pmk = next;
843 ev->cr.pmk_len = params->pmk_len;
844 memcpy((void *)ev->cr.pmk, params->pmk, params->pmk_len);
845 next += params->pmk_len;
846 }
847 if (params->pmkid) {
848 ev->cr.pmkid = next;
849 memcpy((void *)ev->cr.pmkid, params->pmkid, WLAN_PMKID_LEN);
850 next += WLAN_PMKID_LEN;
851 }
852 ev->cr.update_erp_next_seq_num = params->update_erp_next_seq_num;
853 if (params->update_erp_next_seq_num)
854 ev->cr.fils_erp_next_seq_num = params->fils_erp_next_seq_num;
855 if (params->bss)
856 cfg80211_hold_bss(bss_from_pub(params->bss));
857 ev->cr.bss = params->bss;
858 ev->cr.status = params->status;
859 ev->cr.timeout_reason = params->timeout_reason;
860
861 spin_lock_irqsave(&wdev->event_lock, flags);
862 list_add_tail(&ev->list, &wdev->event_list);
863 spin_unlock_irqrestore(&wdev->event_lock, flags);
864 queue_work(cfg80211_wq, &rdev->event_work);
865}
866EXPORT_SYMBOL(cfg80211_connect_done);
867
868/* Consumes bss object one way or another */
869void __cfg80211_roamed(struct wireless_dev *wdev,
870 struct cfg80211_roam_info *info)
871{
872#ifdef CONFIG_CFG80211_WEXT
873 union iwreq_data wrqu;
874#endif
875 ASSERT_WDEV_LOCK(wdev);
876
877 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
878 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
879 goto out;
880
881 if (WARN_ON(!wdev->current_bss))
882 goto out;
883
884 cfg80211_unhold_bss(wdev->current_bss);
885 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
886 wdev->current_bss = NULL;
887
888 if (WARN_ON(!info->bss))
889 return;
890
891 cfg80211_hold_bss(bss_from_pub(info->bss));
892 wdev->current_bss = bss_from_pub(info->bss);
893
894 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
895 wdev->netdev, info, GFP_KERNEL);
896
897#ifdef CONFIG_CFG80211_WEXT
898 if (info->req_ie) {
899 memset(&wrqu, 0, sizeof(wrqu));
900 wrqu.data.length = info->req_ie_len;
901 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
902 &wrqu, info->req_ie);
903 }
904
905 if (info->resp_ie) {
906 memset(&wrqu, 0, sizeof(wrqu));
907 wrqu.data.length = info->resp_ie_len;
908 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
909 &wrqu, info->resp_ie);
910 }
911
912 memset(&wrqu, 0, sizeof(wrqu));
913 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
914 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
915 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
916 wdev->wext.prev_bssid_valid = true;
917 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
918#endif
919
920 return;
921out:
922 cfg80211_put_bss(wdev->wiphy, info->bss);
923}
924
925/* Consumes info->bss object one way or another */
926void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
927 gfp_t gfp)
928{
929 struct wireless_dev *wdev = dev->ieee80211_ptr;
930 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
931 struct cfg80211_event *ev;
932 unsigned long flags;
933
934 if (!info->bss) {
935 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
936 info->bssid, wdev->ssid,
937 wdev->ssid_len,
938 wdev->conn_bss_type,
939 IEEE80211_PRIVACY_ANY);
940 }
941
942 if (WARN_ON(!info->bss))
943 return;
944
945 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len, gfp);
946 if (!ev) {
947 cfg80211_put_bss(wdev->wiphy, info->bss);
948 return;
949 }
950
951 ev->type = EVENT_ROAMED;
952 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
953 ev->rm.req_ie_len = info->req_ie_len;
954 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
955 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + info->req_ie_len;
956 ev->rm.resp_ie_len = info->resp_ie_len;
957 memcpy((void *)ev->rm.resp_ie, info->resp_ie, info->resp_ie_len);
958 ev->rm.bss = info->bss;
959
960 spin_lock_irqsave(&wdev->event_lock, flags);
961 list_add_tail(&ev->list, &wdev->event_list);
962 spin_unlock_irqrestore(&wdev->event_lock, flags);
963 queue_work(cfg80211_wq, &rdev->event_work);
964}
965EXPORT_SYMBOL(cfg80211_roamed);
966
967void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
968{
969 ASSERT_WDEV_LOCK(wdev);
970
971 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
972 return;
973
974 if (WARN_ON(!wdev->current_bss) ||
975 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
976 return;
977
978 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
979 bssid);
980}
981
982void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
983 gfp_t gfp)
984{
985 struct wireless_dev *wdev = dev->ieee80211_ptr;
986 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
987 struct cfg80211_event *ev;
988 unsigned long flags;
989
990 if (WARN_ON(!bssid))
991 return;
992
993 ev = kzalloc(sizeof(*ev), gfp);
994 if (!ev)
995 return;
996
997 ev->type = EVENT_PORT_AUTHORIZED;
998 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
999
1000 /*
1001 * Use the wdev event list so that if there are pending
1002 * connected/roamed events, they will be reported first.
1003 */
1004 spin_lock_irqsave(&wdev->event_lock, flags);
1005 list_add_tail(&ev->list, &wdev->event_list);
1006 spin_unlock_irqrestore(&wdev->event_lock, flags);
1007 queue_work(cfg80211_wq, &rdev->event_work);
1008}
1009EXPORT_SYMBOL(cfg80211_port_authorized);
1010
1011void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1012 size_t ie_len, u16 reason, bool from_ap)
1013{
1014 struct wireless_dev *wdev = dev->ieee80211_ptr;
1015 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1016 int i;
1017#ifdef CONFIG_CFG80211_WEXT
1018 union iwreq_data wrqu;
1019#endif
1020
1021 ASSERT_WDEV_LOCK(wdev);
1022
1023 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1024 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1025 return;
1026
1027 if (wdev->current_bss) {
1028 cfg80211_unhold_bss(wdev->current_bss);
1029 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1030 }
1031
1032 wdev->current_bss = NULL;
1033 wdev->ssid_len = 0;
1034 wdev->conn_owner_nlportid = 0;
1035 kzfree(wdev->connect_keys);
1036 wdev->connect_keys = NULL;
1037
1038 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1039
1040 /* stop critical protocol if supported */
1041 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1042 rdev->crit_proto_nlportid = 0;
1043 rdev_crit_proto_stop(rdev, wdev);
1044 }
1045
1046 /*
1047 * Delete all the keys ... pairwise keys can't really
1048 * exist any more anyway, but default keys might.
1049 */
1050 if (rdev->ops->del_key)
1051 for (i = 0; i < 6; i++)
1052 rdev_del_key(rdev, dev, i, false, NULL);
1053
1054 rdev_set_qos_map(rdev, dev, NULL);
1055
1056#ifdef CONFIG_CFG80211_WEXT
1057 memset(&wrqu, 0, sizeof(wrqu));
1058 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1059 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1060 wdev->wext.connect.ssid_len = 0;
1061#endif
1062
1063 schedule_work(&cfg80211_disconnect_work);
1064}
1065
1066void cfg80211_disconnected(struct net_device *dev, u16 reason,
1067 const u8 *ie, size_t ie_len,
1068 bool locally_generated, gfp_t gfp)
1069{
1070 struct wireless_dev *wdev = dev->ieee80211_ptr;
1071 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1072 struct cfg80211_event *ev;
1073 unsigned long flags;
1074
1075 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1076 if (!ev)
1077 return;
1078
1079 ev->type = EVENT_DISCONNECTED;
1080 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1081 ev->dc.ie_len = ie_len;
1082 memcpy((void *)ev->dc.ie, ie, ie_len);
1083 ev->dc.reason = reason;
1084 ev->dc.locally_generated = locally_generated;
1085
1086 spin_lock_irqsave(&wdev->event_lock, flags);
1087 list_add_tail(&ev->list, &wdev->event_list);
1088 spin_unlock_irqrestore(&wdev->event_lock, flags);
1089 queue_work(cfg80211_wq, &rdev->event_work);
1090}
1091EXPORT_SYMBOL(cfg80211_disconnected);
1092
1093/*
1094 * API calls for nl80211/wext compatibility code
1095 */
1096int cfg80211_connect(struct cfg80211_registered_device *rdev,
1097 struct net_device *dev,
1098 struct cfg80211_connect_params *connect,
1099 struct cfg80211_cached_keys *connkeys,
1100 const u8 *prev_bssid)
1101{
1102 struct wireless_dev *wdev = dev->ieee80211_ptr;
1103 int err;
1104
1105 ASSERT_WDEV_LOCK(wdev);
1106
1107 /*
1108 * If we have an ssid_len, we're trying to connect or are
1109 * already connected, so reject a new SSID unless it's the
1110 * same (which is the case for re-association.)
1111 */
1112 if (wdev->ssid_len &&
1113 (wdev->ssid_len != connect->ssid_len ||
1114 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1115 return -EALREADY;
1116
1117 /*
1118 * If connected, reject (re-)association unless prev_bssid
1119 * matches the current BSSID.
1120 */
1121 if (wdev->current_bss) {
1122 if (!prev_bssid)
1123 return -EALREADY;
1124 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1125 return -ENOTCONN;
1126 }
1127
1128 /*
1129 * Reject if we're in the process of connecting with WEP,
1130 * this case isn't very interesting and trying to handle
1131 * it would make the code much more complex.
1132 */
1133 if (wdev->connect_keys)
1134 return -EINPROGRESS;
1135
1136 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1137 rdev->wiphy.ht_capa_mod_mask);
1138
1139 if (connkeys && connkeys->def >= 0) {
1140 int idx;
1141 u32 cipher;
1142
1143 idx = connkeys->def;
1144 cipher = connkeys->params[idx].cipher;
1145 /* If given a WEP key we may need it for shared key auth */
1146 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1147 cipher == WLAN_CIPHER_SUITE_WEP104) {
1148 connect->key_idx = idx;
1149 connect->key = connkeys->params[idx].key;
1150 connect->key_len = connkeys->params[idx].key_len;
1151
1152 /*
1153 * If ciphers are not set (e.g. when going through
1154 * iwconfig), we have to set them appropriately here.
1155 */
1156 if (connect->crypto.cipher_group == 0)
1157 connect->crypto.cipher_group = cipher;
1158
1159 if (connect->crypto.n_ciphers_pairwise == 0) {
1160 connect->crypto.n_ciphers_pairwise = 1;
1161 connect->crypto.ciphers_pairwise[0] = cipher;
1162 }
1163 }
1164
1165 connect->crypto.wep_keys = connkeys->params;
1166 connect->crypto.wep_tx_key = connkeys->def;
1167 } else {
1168 if (WARN_ON(connkeys))
1169 return -EINVAL;
1170 }
1171
1172 wdev->connect_keys = connkeys;
1173 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1174 wdev->ssid_len = connect->ssid_len;
1175
1176 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1177 IEEE80211_BSS_TYPE_ESS;
1178
1179 if (!rdev->ops->connect)
1180 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1181 else
1182 err = rdev_connect(rdev, dev, connect);
1183
1184 if (err) {
1185 wdev->connect_keys = NULL;
1186 /*
1187 * This could be reassoc getting refused, don't clear
1188 * ssid_len in that case.
1189 */
1190 if (!wdev->current_bss)
1191 wdev->ssid_len = 0;
1192 return err;
1193 }
1194
1195 return 0;
1196}
1197
1198int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1199 struct net_device *dev, u16 reason, bool wextev)
1200{
1201 struct wireless_dev *wdev = dev->ieee80211_ptr;
1202 int err = 0;
1203
1204 ASSERT_WDEV_LOCK(wdev);
1205
1206 kzfree(wdev->connect_keys);
1207 wdev->connect_keys = NULL;
1208
1209 wdev->conn_owner_nlportid = 0;
1210
1211 if (wdev->conn)
1212 err = cfg80211_sme_disconnect(wdev, reason);
1213 else if (!rdev->ops->disconnect)
1214 cfg80211_mlme_down(rdev, dev);
1215 else if (wdev->ssid_len)
1216 err = rdev_disconnect(rdev, dev, reason);
1217
1218 /*
1219 * Clear ssid_len unless we actually were fully connected,
1220 * in which case cfg80211_disconnected() will take care of
1221 * this later.
1222 */
1223 if (!wdev->current_bss)
1224 wdev->ssid_len = 0;
1225
1226 return err;
1227}
1228
1229/*
1230 * Used to clean up after the connection / connection attempt owner socket
1231 * disconnects
1232 */
1233void cfg80211_autodisconnect_wk(struct work_struct *work)
1234{
1235 struct wireless_dev *wdev =
1236 container_of(work, struct wireless_dev, disconnect_wk);
1237 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1238
1239 wdev_lock(wdev);
1240
1241 if (wdev->conn_owner_nlportid) {
1242 switch (wdev->iftype) {
1243 case NL80211_IFTYPE_ADHOC:
1244 cfg80211_leave_ibss(rdev, wdev->netdev, false);
1245 break;
1246 case NL80211_IFTYPE_AP:
1247 case NL80211_IFTYPE_P2P_GO:
1248 cfg80211_stop_ap(rdev, wdev->netdev, false);
1249 break;
1250 case NL80211_IFTYPE_MESH_POINT:
1251 cfg80211_leave_mesh(rdev, wdev->netdev);
1252 break;
1253 case NL80211_IFTYPE_STATION:
1254 case NL80211_IFTYPE_P2P_CLIENT:
1255 /*
1256 * Use disconnect_bssid if still connecting and
1257 * ops->disconnect not implemented. Otherwise we can
1258 * use cfg80211_disconnect.
1259 */
1260 if (rdev->ops->disconnect || wdev->current_bss)
1261 cfg80211_disconnect(rdev, wdev->netdev,
1262 WLAN_REASON_DEAUTH_LEAVING,
1263 true);
1264 else
1265 cfg80211_mlme_deauth(rdev, wdev->netdev,
1266 wdev->disconnect_bssid,
1267 NULL, 0,
1268 WLAN_REASON_DEAUTH_LEAVING,
1269 false);
1270 break;
1271 default:
1272 break;
1273 }
1274 }
1275
1276 wdev_unlock(wdev);
1277}