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1/*
2 * SME code for cfg80211's connect emulation.
3 *
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2009 Intel Corporation. All rights reserved.
6 */
7
8#include <linux/etherdevice.h>
9#include <linux/if_arp.h>
10#include <linux/slab.h>
11#include <linux/workqueue.h>
12#include <linux/wireless.h>
13#include <net/iw_handler.h>
14#include <net/cfg80211.h>
15#include <net/rtnetlink.h>
16#include "nl80211.h"
17#include "reg.h"
18
19struct cfg80211_conn {
20 struct cfg80211_connect_params params;
21 /* these are sub-states of the _CONNECTING sme_state */
22 enum {
23 CFG80211_CONN_IDLE,
24 CFG80211_CONN_SCANNING,
25 CFG80211_CONN_SCAN_AGAIN,
26 CFG80211_CONN_AUTHENTICATE_NEXT,
27 CFG80211_CONN_AUTHENTICATING,
28 CFG80211_CONN_ASSOCIATE_NEXT,
29 CFG80211_CONN_ASSOCIATING,
30 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
31 } state;
32 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
33 u8 *ie;
34 size_t ie_len;
35 bool auto_auth, prev_bssid_valid;
36};
37
38static bool cfg80211_is_all_idle(void)
39{
40 struct cfg80211_registered_device *rdev;
41 struct wireless_dev *wdev;
42 bool is_all_idle = true;
43
44 mutex_lock(&cfg80211_mutex);
45
46 /*
47 * All devices must be idle as otherwise if you are actively
48 * scanning some new beacon hints could be learned and would
49 * count as new regulatory hints.
50 */
51 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
52 cfg80211_lock_rdev(rdev);
53 list_for_each_entry(wdev, &rdev->netdev_list, list) {
54 wdev_lock(wdev);
55 if (wdev->sme_state != CFG80211_SME_IDLE)
56 is_all_idle = false;
57 wdev_unlock(wdev);
58 }
59 cfg80211_unlock_rdev(rdev);
60 }
61
62 mutex_unlock(&cfg80211_mutex);
63
64 return is_all_idle;
65}
66
67static void disconnect_work(struct work_struct *work)
68{
69 if (!cfg80211_is_all_idle())
70 return;
71
72 regulatory_hint_disconnect();
73}
74
75static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
76
77static int cfg80211_conn_scan(struct wireless_dev *wdev)
78{
79 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
80 struct cfg80211_scan_request *request;
81 int n_channels, err;
82
83 ASSERT_RTNL();
84 ASSERT_RDEV_LOCK(rdev);
85 ASSERT_WDEV_LOCK(wdev);
86
87 if (rdev->scan_req)
88 return -EBUSY;
89
90 if (wdev->conn->params.channel) {
91 n_channels = 1;
92 } else {
93 enum ieee80211_band band;
94 n_channels = 0;
95
96 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
97 if (!wdev->wiphy->bands[band])
98 continue;
99 n_channels += wdev->wiphy->bands[band]->n_channels;
100 }
101 }
102 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
103 sizeof(request->channels[0]) * n_channels,
104 GFP_KERNEL);
105 if (!request)
106 return -ENOMEM;
107
108 if (wdev->conn->params.channel)
109 request->channels[0] = wdev->conn->params.channel;
110 else {
111 int i = 0, j;
112 enum ieee80211_band band;
113
114 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
115 if (!wdev->wiphy->bands[band])
116 continue;
117 for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
118 i++, j++)
119 request->channels[i] =
120 &wdev->wiphy->bands[band]->channels[j];
121 request->rates[band] =
122 (1 << wdev->wiphy->bands[band]->n_bitrates) - 1;
123 }
124 }
125 request->n_channels = n_channels;
126 request->ssids = (void *)&request->channels[n_channels];
127 request->n_ssids = 1;
128
129 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
130 wdev->conn->params.ssid_len);
131 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
132
133 request->dev = wdev->netdev;
134 request->wiphy = &rdev->wiphy;
135
136 rdev->scan_req = request;
137
138 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
139 if (!err) {
140 wdev->conn->state = CFG80211_CONN_SCANNING;
141 nl80211_send_scan_start(rdev, wdev->netdev);
142 dev_hold(wdev->netdev);
143 } else {
144 rdev->scan_req = NULL;
145 kfree(request);
146 }
147 return err;
148}
149
150static int cfg80211_conn_do_work(struct wireless_dev *wdev)
151{
152 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
153 struct cfg80211_connect_params *params;
154 const u8 *prev_bssid = NULL;
155 int err;
156
157 ASSERT_WDEV_LOCK(wdev);
158
159 if (!wdev->conn)
160 return 0;
161
162 params = &wdev->conn->params;
163
164 switch (wdev->conn->state) {
165 case CFG80211_CONN_SCAN_AGAIN:
166 return cfg80211_conn_scan(wdev);
167 case CFG80211_CONN_AUTHENTICATE_NEXT:
168 BUG_ON(!rdev->ops->auth);
169 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
170 return __cfg80211_mlme_auth(rdev, wdev->netdev,
171 params->channel, params->auth_type,
172 params->bssid,
173 params->ssid, params->ssid_len,
174 NULL, 0,
175 params->key, params->key_len,
176 params->key_idx, false);
177 case CFG80211_CONN_ASSOCIATE_NEXT:
178 BUG_ON(!rdev->ops->assoc);
179 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
180 if (wdev->conn->prev_bssid_valid)
181 prev_bssid = wdev->conn->prev_bssid;
182 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
183 params->channel, params->bssid,
184 prev_bssid,
185 params->ssid, params->ssid_len,
186 params->ie, params->ie_len,
187 false, ¶ms->crypto);
188 if (err)
189 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
190 NULL, 0,
191 WLAN_REASON_DEAUTH_LEAVING,
192 false);
193 return err;
194 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
195 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
196 NULL, 0,
197 WLAN_REASON_DEAUTH_LEAVING, false);
198 /* return an error so that we call __cfg80211_connect_result() */
199 return -EINVAL;
200 default:
201 return 0;
202 }
203}
204
205void cfg80211_conn_work(struct work_struct *work)
206{
207 struct cfg80211_registered_device *rdev =
208 container_of(work, struct cfg80211_registered_device, conn_work);
209 struct wireless_dev *wdev;
210 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
211
212 rtnl_lock();
213 cfg80211_lock_rdev(rdev);
214 mutex_lock(&rdev->devlist_mtx);
215
216 list_for_each_entry(wdev, &rdev->netdev_list, list) {
217 wdev_lock(wdev);
218 if (!netif_running(wdev->netdev)) {
219 wdev_unlock(wdev);
220 continue;
221 }
222 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
223 wdev_unlock(wdev);
224 continue;
225 }
226 if (wdev->conn->params.bssid) {
227 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
228 bssid = bssid_buf;
229 }
230 if (cfg80211_conn_do_work(wdev))
231 __cfg80211_connect_result(
232 wdev->netdev, bssid,
233 NULL, 0, NULL, 0,
234 WLAN_STATUS_UNSPECIFIED_FAILURE,
235 false, NULL);
236 wdev_unlock(wdev);
237 }
238
239 mutex_unlock(&rdev->devlist_mtx);
240 cfg80211_unlock_rdev(rdev);
241 rtnl_unlock();
242}
243
244static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
245{
246 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
247 struct cfg80211_bss *bss;
248 u16 capa = WLAN_CAPABILITY_ESS;
249
250 ASSERT_WDEV_LOCK(wdev);
251
252 if (wdev->conn->params.privacy)
253 capa |= WLAN_CAPABILITY_PRIVACY;
254
255 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
256 wdev->conn->params.bssid,
257 wdev->conn->params.ssid,
258 wdev->conn->params.ssid_len,
259 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
260 capa);
261 if (!bss)
262 return NULL;
263
264 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
265 wdev->conn->params.bssid = wdev->conn->bssid;
266 wdev->conn->params.channel = bss->channel;
267 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
268 schedule_work(&rdev->conn_work);
269
270 return bss;
271}
272
273static void __cfg80211_sme_scan_done(struct net_device *dev)
274{
275 struct wireless_dev *wdev = dev->ieee80211_ptr;
276 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
277 struct cfg80211_bss *bss;
278
279 ASSERT_WDEV_LOCK(wdev);
280
281 if (wdev->sme_state != CFG80211_SME_CONNECTING)
282 return;
283
284 if (!wdev->conn)
285 return;
286
287 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
288 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
289 return;
290
291 bss = cfg80211_get_conn_bss(wdev);
292 if (bss) {
293 cfg80211_put_bss(bss);
294 } else {
295 /* not found */
296 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
297 schedule_work(&rdev->conn_work);
298 else
299 __cfg80211_connect_result(
300 wdev->netdev,
301 wdev->conn->params.bssid,
302 NULL, 0, NULL, 0,
303 WLAN_STATUS_UNSPECIFIED_FAILURE,
304 false, NULL);
305 }
306}
307
308void cfg80211_sme_scan_done(struct net_device *dev)
309{
310 struct wireless_dev *wdev = dev->ieee80211_ptr;
311
312 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
313 wdev_lock(wdev);
314 __cfg80211_sme_scan_done(dev);
315 wdev_unlock(wdev);
316 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
317}
318
319void cfg80211_sme_rx_auth(struct net_device *dev,
320 const u8 *buf, size_t len)
321{
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
323 struct wiphy *wiphy = wdev->wiphy;
324 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
325 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
326 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
327
328 ASSERT_WDEV_LOCK(wdev);
329
330 /* should only RX auth frames when connecting */
331 if (wdev->sme_state != CFG80211_SME_CONNECTING)
332 return;
333
334 if (WARN_ON(!wdev->conn))
335 return;
336
337 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
338 wdev->conn->auto_auth &&
339 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
340 /* select automatically between only open, shared, leap */
341 switch (wdev->conn->params.auth_type) {
342 case NL80211_AUTHTYPE_OPEN_SYSTEM:
343 if (wdev->connect_keys)
344 wdev->conn->params.auth_type =
345 NL80211_AUTHTYPE_SHARED_KEY;
346 else
347 wdev->conn->params.auth_type =
348 NL80211_AUTHTYPE_NETWORK_EAP;
349 break;
350 case NL80211_AUTHTYPE_SHARED_KEY:
351 wdev->conn->params.auth_type =
352 NL80211_AUTHTYPE_NETWORK_EAP;
353 break;
354 default:
355 /* huh? */
356 wdev->conn->params.auth_type =
357 NL80211_AUTHTYPE_OPEN_SYSTEM;
358 break;
359 }
360 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
361 schedule_work(&rdev->conn_work);
362 } else if (status_code != WLAN_STATUS_SUCCESS) {
363 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
364 status_code, false, NULL);
365 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
366 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
367 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
368 schedule_work(&rdev->conn_work);
369 }
370}
371
372bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
373{
374 struct wiphy *wiphy = wdev->wiphy;
375 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
376
377 if (WARN_ON(!wdev->conn))
378 return false;
379
380 if (!wdev->conn->prev_bssid_valid)
381 return false;
382
383 /*
384 * Some stupid APs don't accept reassoc, so we
385 * need to fall back to trying regular assoc.
386 */
387 wdev->conn->prev_bssid_valid = false;
388 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
389 schedule_work(&rdev->conn_work);
390
391 return true;
392}
393
394void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
395{
396 struct wiphy *wiphy = wdev->wiphy;
397 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
398
399 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
400 schedule_work(&rdev->conn_work);
401}
402
403void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
404 const u8 *req_ie, size_t req_ie_len,
405 const u8 *resp_ie, size_t resp_ie_len,
406 u16 status, bool wextev,
407 struct cfg80211_bss *bss)
408{
409 struct wireless_dev *wdev = dev->ieee80211_ptr;
410 u8 *country_ie;
411#ifdef CONFIG_CFG80211_WEXT
412 union iwreq_data wrqu;
413#endif
414
415 ASSERT_WDEV_LOCK(wdev);
416
417 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
418 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
419 return;
420
421 if (wdev->sme_state != CFG80211_SME_CONNECTING)
422 return;
423
424 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
425 bssid, req_ie, req_ie_len,
426 resp_ie, resp_ie_len,
427 status, GFP_KERNEL);
428
429#ifdef CONFIG_CFG80211_WEXT
430 if (wextev) {
431 if (req_ie && status == WLAN_STATUS_SUCCESS) {
432 memset(&wrqu, 0, sizeof(wrqu));
433 wrqu.data.length = req_ie_len;
434 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
435 }
436
437 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
438 memset(&wrqu, 0, sizeof(wrqu));
439 wrqu.data.length = resp_ie_len;
440 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
441 }
442
443 memset(&wrqu, 0, sizeof(wrqu));
444 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
445 if (bssid && status == WLAN_STATUS_SUCCESS) {
446 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
447 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
448 wdev->wext.prev_bssid_valid = true;
449 }
450 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
451 }
452#endif
453
454 if (wdev->current_bss) {
455 cfg80211_unhold_bss(wdev->current_bss);
456 cfg80211_put_bss(&wdev->current_bss->pub);
457 wdev->current_bss = NULL;
458 }
459
460 if (wdev->conn)
461 wdev->conn->state = CFG80211_CONN_IDLE;
462
463 if (status != WLAN_STATUS_SUCCESS) {
464 wdev->sme_state = CFG80211_SME_IDLE;
465 if (wdev->conn)
466 kfree(wdev->conn->ie);
467 kfree(wdev->conn);
468 wdev->conn = NULL;
469 kfree(wdev->connect_keys);
470 wdev->connect_keys = NULL;
471 wdev->ssid_len = 0;
472 return;
473 }
474
475 if (!bss)
476 bss = cfg80211_get_bss(wdev->wiphy,
477 wdev->conn ? wdev->conn->params.channel :
478 NULL,
479 bssid,
480 wdev->ssid, wdev->ssid_len,
481 WLAN_CAPABILITY_ESS,
482 WLAN_CAPABILITY_ESS);
483
484 if (WARN_ON(!bss))
485 return;
486
487 cfg80211_hold_bss(bss_from_pub(bss));
488 wdev->current_bss = bss_from_pub(bss);
489
490 wdev->sme_state = CFG80211_SME_CONNECTED;
491 cfg80211_upload_connect_keys(wdev);
492
493 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
494
495 if (!country_ie)
496 return;
497
498 /*
499 * ieee80211_bss_get_ie() ensures we can access:
500 * - country_ie + 2, the start of the country ie data, and
501 * - and country_ie[1] which is the IE length
502 */
503 regulatory_hint_11d(wdev->wiphy,
504 bss->channel->band,
505 country_ie + 2,
506 country_ie[1]);
507}
508
509void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
510 const u8 *req_ie, size_t req_ie_len,
511 const u8 *resp_ie, size_t resp_ie_len,
512 u16 status, gfp_t gfp)
513{
514 struct wireless_dev *wdev = dev->ieee80211_ptr;
515 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
516 struct cfg80211_event *ev;
517 unsigned long flags;
518
519 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
520
521 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
522 if (!ev)
523 return;
524
525 ev->type = EVENT_CONNECT_RESULT;
526 if (bssid)
527 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
528 if (req_ie_len) {
529 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
530 ev->cr.req_ie_len = req_ie_len;
531 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
532 }
533 if (resp_ie_len) {
534 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
535 ev->cr.resp_ie_len = resp_ie_len;
536 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
537 }
538 ev->cr.status = status;
539
540 spin_lock_irqsave(&wdev->event_lock, flags);
541 list_add_tail(&ev->list, &wdev->event_list);
542 spin_unlock_irqrestore(&wdev->event_lock, flags);
543 queue_work(cfg80211_wq, &rdev->event_work);
544}
545EXPORT_SYMBOL(cfg80211_connect_result);
546
547void __cfg80211_roamed(struct wireless_dev *wdev,
548 struct ieee80211_channel *channel,
549 const u8 *bssid,
550 const u8 *req_ie, size_t req_ie_len,
551 const u8 *resp_ie, size_t resp_ie_len)
552{
553 struct cfg80211_bss *bss;
554#ifdef CONFIG_CFG80211_WEXT
555 union iwreq_data wrqu;
556#endif
557
558 ASSERT_WDEV_LOCK(wdev);
559
560 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
561 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
562 return;
563
564 if (wdev->sme_state != CFG80211_SME_CONNECTED)
565 return;
566
567 /* internal error -- how did we get to CONNECTED w/o BSS? */
568 if (WARN_ON(!wdev->current_bss)) {
569 return;
570 }
571
572 cfg80211_unhold_bss(wdev->current_bss);
573 cfg80211_put_bss(&wdev->current_bss->pub);
574 wdev->current_bss = NULL;
575
576 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid,
577 wdev->ssid, wdev->ssid_len,
578 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
579
580 if (WARN_ON(!bss))
581 return;
582
583 cfg80211_hold_bss(bss_from_pub(bss));
584 wdev->current_bss = bss_from_pub(bss);
585
586 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
587 req_ie, req_ie_len, resp_ie, resp_ie_len,
588 GFP_KERNEL);
589
590#ifdef CONFIG_CFG80211_WEXT
591 if (req_ie) {
592 memset(&wrqu, 0, sizeof(wrqu));
593 wrqu.data.length = req_ie_len;
594 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
595 &wrqu, req_ie);
596 }
597
598 if (resp_ie) {
599 memset(&wrqu, 0, sizeof(wrqu));
600 wrqu.data.length = resp_ie_len;
601 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
602 &wrqu, resp_ie);
603 }
604
605 memset(&wrqu, 0, sizeof(wrqu));
606 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
607 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
608 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
609 wdev->wext.prev_bssid_valid = true;
610 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
611#endif
612}
613
614void cfg80211_roamed(struct net_device *dev,
615 struct ieee80211_channel *channel,
616 const u8 *bssid,
617 const u8 *req_ie, size_t req_ie_len,
618 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
619{
620 struct wireless_dev *wdev = dev->ieee80211_ptr;
621 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
622 struct cfg80211_event *ev;
623 unsigned long flags;
624
625 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
626
627 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
628 if (!ev)
629 return;
630
631 ev->type = EVENT_ROAMED;
632 ev->rm.channel = channel;
633 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
634 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
635 ev->rm.req_ie_len = req_ie_len;
636 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
637 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
638 ev->rm.resp_ie_len = resp_ie_len;
639 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
640
641 spin_lock_irqsave(&wdev->event_lock, flags);
642 list_add_tail(&ev->list, &wdev->event_list);
643 spin_unlock_irqrestore(&wdev->event_lock, flags);
644 queue_work(cfg80211_wq, &rdev->event_work);
645}
646EXPORT_SYMBOL(cfg80211_roamed);
647
648void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
649 size_t ie_len, u16 reason, bool from_ap)
650{
651 struct wireless_dev *wdev = dev->ieee80211_ptr;
652 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
653 int i;
654#ifdef CONFIG_CFG80211_WEXT
655 union iwreq_data wrqu;
656#endif
657
658 ASSERT_WDEV_LOCK(wdev);
659
660 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
661 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
662 return;
663
664 if (wdev->sme_state != CFG80211_SME_CONNECTED)
665 return;
666
667 if (wdev->current_bss) {
668 cfg80211_unhold_bss(wdev->current_bss);
669 cfg80211_put_bss(&wdev->current_bss->pub);
670 }
671
672 wdev->current_bss = NULL;
673 wdev->sme_state = CFG80211_SME_IDLE;
674 wdev->ssid_len = 0;
675
676 if (wdev->conn) {
677 const u8 *bssid;
678 int ret;
679
680 kfree(wdev->conn->ie);
681 wdev->conn->ie = NULL;
682 kfree(wdev->conn);
683 wdev->conn = NULL;
684
685 /*
686 * If this disconnect was due to a disassoc, we
687 * we might still have an auth BSS around. For
688 * the userspace SME that's currently expected,
689 * but for the kernel SME (nl80211 CONNECT or
690 * wireless extensions) we want to clear up all
691 * state.
692 */
693 for (i = 0; i < MAX_AUTH_BSSES; i++) {
694 if (!wdev->auth_bsses[i])
695 continue;
696 bssid = wdev->auth_bsses[i]->pub.bssid;
697 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
698 WLAN_REASON_DEAUTH_LEAVING,
699 false);
700 WARN(ret, "deauth failed: %d\n", ret);
701 }
702 }
703
704 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
705
706 /*
707 * Delete all the keys ... pairwise keys can't really
708 * exist any more anyway, but default keys might.
709 */
710 if (rdev->ops->del_key)
711 for (i = 0; i < 6; i++)
712 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
713
714#ifdef CONFIG_CFG80211_WEXT
715 memset(&wrqu, 0, sizeof(wrqu));
716 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
717 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
718 wdev->wext.connect.ssid_len = 0;
719#endif
720
721 schedule_work(&cfg80211_disconnect_work);
722}
723
724void cfg80211_disconnected(struct net_device *dev, u16 reason,
725 u8 *ie, size_t ie_len, gfp_t gfp)
726{
727 struct wireless_dev *wdev = dev->ieee80211_ptr;
728 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
729 struct cfg80211_event *ev;
730 unsigned long flags;
731
732 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
733
734 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
735 if (!ev)
736 return;
737
738 ev->type = EVENT_DISCONNECTED;
739 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
740 ev->dc.ie_len = ie_len;
741 memcpy((void *)ev->dc.ie, ie, ie_len);
742 ev->dc.reason = reason;
743
744 spin_lock_irqsave(&wdev->event_lock, flags);
745 list_add_tail(&ev->list, &wdev->event_list);
746 spin_unlock_irqrestore(&wdev->event_lock, flags);
747 queue_work(cfg80211_wq, &rdev->event_work);
748}
749EXPORT_SYMBOL(cfg80211_disconnected);
750
751int __cfg80211_connect(struct cfg80211_registered_device *rdev,
752 struct net_device *dev,
753 struct cfg80211_connect_params *connect,
754 struct cfg80211_cached_keys *connkeys,
755 const u8 *prev_bssid)
756{
757 struct wireless_dev *wdev = dev->ieee80211_ptr;
758 struct cfg80211_bss *bss = NULL;
759 int err;
760
761 ASSERT_WDEV_LOCK(wdev);
762
763 if (wdev->sme_state != CFG80211_SME_IDLE)
764 return -EALREADY;
765
766 if (WARN_ON(wdev->connect_keys)) {
767 kfree(wdev->connect_keys);
768 wdev->connect_keys = NULL;
769 }
770
771 if (connkeys && connkeys->def >= 0) {
772 int idx;
773 u32 cipher;
774
775 idx = connkeys->def;
776 cipher = connkeys->params[idx].cipher;
777 /* If given a WEP key we may need it for shared key auth */
778 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
779 cipher == WLAN_CIPHER_SUITE_WEP104) {
780 connect->key_idx = idx;
781 connect->key = connkeys->params[idx].key;
782 connect->key_len = connkeys->params[idx].key_len;
783
784 /*
785 * If ciphers are not set (e.g. when going through
786 * iwconfig), we have to set them appropriately here.
787 */
788 if (connect->crypto.cipher_group == 0)
789 connect->crypto.cipher_group = cipher;
790
791 if (connect->crypto.n_ciphers_pairwise == 0) {
792 connect->crypto.n_ciphers_pairwise = 1;
793 connect->crypto.ciphers_pairwise[0] = cipher;
794 }
795 }
796 }
797
798 if (!rdev->ops->connect) {
799 if (!rdev->ops->auth || !rdev->ops->assoc)
800 return -EOPNOTSUPP;
801
802 if (WARN_ON(wdev->conn))
803 return -EINPROGRESS;
804
805 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
806 if (!wdev->conn)
807 return -ENOMEM;
808
809 /*
810 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
811 */
812 memcpy(&wdev->conn->params, connect, sizeof(*connect));
813 if (connect->bssid) {
814 wdev->conn->params.bssid = wdev->conn->bssid;
815 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
816 }
817
818 if (connect->ie) {
819 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
820 GFP_KERNEL);
821 wdev->conn->params.ie = wdev->conn->ie;
822 if (!wdev->conn->ie) {
823 kfree(wdev->conn);
824 wdev->conn = NULL;
825 return -ENOMEM;
826 }
827 }
828
829 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
830 wdev->conn->auto_auth = true;
831 /* start with open system ... should mostly work */
832 wdev->conn->params.auth_type =
833 NL80211_AUTHTYPE_OPEN_SYSTEM;
834 } else {
835 wdev->conn->auto_auth = false;
836 }
837
838 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
839 wdev->ssid_len = connect->ssid_len;
840 wdev->conn->params.ssid = wdev->ssid;
841 wdev->conn->params.ssid_len = connect->ssid_len;
842
843 /* see if we have the bss already */
844 bss = cfg80211_get_conn_bss(wdev);
845
846 wdev->sme_state = CFG80211_SME_CONNECTING;
847 wdev->connect_keys = connkeys;
848
849 if (prev_bssid) {
850 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
851 wdev->conn->prev_bssid_valid = true;
852 }
853
854 /* we're good if we have a matching bss struct */
855 if (bss) {
856 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
857 err = cfg80211_conn_do_work(wdev);
858 cfg80211_put_bss(bss);
859 } else {
860 /* otherwise we'll need to scan for the AP first */
861 err = cfg80211_conn_scan(wdev);
862 /*
863 * If we can't scan right now, then we need to scan again
864 * after the current scan finished, since the parameters
865 * changed (unless we find a good AP anyway).
866 */
867 if (err == -EBUSY) {
868 err = 0;
869 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
870 }
871 }
872 if (err) {
873 kfree(wdev->conn->ie);
874 kfree(wdev->conn);
875 wdev->conn = NULL;
876 wdev->sme_state = CFG80211_SME_IDLE;
877 wdev->connect_keys = NULL;
878 wdev->ssid_len = 0;
879 }
880
881 return err;
882 } else {
883 wdev->sme_state = CFG80211_SME_CONNECTING;
884 wdev->connect_keys = connkeys;
885 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
886 if (err) {
887 wdev->connect_keys = NULL;
888 wdev->sme_state = CFG80211_SME_IDLE;
889 return err;
890 }
891
892 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
893 wdev->ssid_len = connect->ssid_len;
894
895 return 0;
896 }
897}
898
899int cfg80211_connect(struct cfg80211_registered_device *rdev,
900 struct net_device *dev,
901 struct cfg80211_connect_params *connect,
902 struct cfg80211_cached_keys *connkeys)
903{
904 int err;
905
906 mutex_lock(&rdev->devlist_mtx);
907 wdev_lock(dev->ieee80211_ptr);
908 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
909 wdev_unlock(dev->ieee80211_ptr);
910 mutex_unlock(&rdev->devlist_mtx);
911
912 return err;
913}
914
915int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
916 struct net_device *dev, u16 reason, bool wextev)
917{
918 struct wireless_dev *wdev = dev->ieee80211_ptr;
919 int err;
920
921 ASSERT_WDEV_LOCK(wdev);
922
923 if (wdev->sme_state == CFG80211_SME_IDLE)
924 return -EINVAL;
925
926 kfree(wdev->connect_keys);
927 wdev->connect_keys = NULL;
928
929 if (!rdev->ops->disconnect) {
930 if (!rdev->ops->deauth)
931 return -EOPNOTSUPP;
932
933 /* was it connected by userspace SME? */
934 if (!wdev->conn) {
935 cfg80211_mlme_down(rdev, dev);
936 return 0;
937 }
938
939 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
940 (wdev->conn->state == CFG80211_CONN_SCANNING ||
941 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
942 wdev->sme_state = CFG80211_SME_IDLE;
943 kfree(wdev->conn->ie);
944 kfree(wdev->conn);
945 wdev->conn = NULL;
946 wdev->ssid_len = 0;
947 return 0;
948 }
949
950 /* wdev->conn->params.bssid must be set if > SCANNING */
951 err = __cfg80211_mlme_deauth(rdev, dev,
952 wdev->conn->params.bssid,
953 NULL, 0, reason, false);
954 if (err)
955 return err;
956 } else {
957 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
958 if (err)
959 return err;
960 }
961
962 if (wdev->sme_state == CFG80211_SME_CONNECTED)
963 __cfg80211_disconnected(dev, NULL, 0, 0, false);
964 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
965 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
966 WLAN_STATUS_UNSPECIFIED_FAILURE,
967 wextev, NULL);
968
969 return 0;
970}
971
972int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
973 struct net_device *dev,
974 u16 reason, bool wextev)
975{
976 int err;
977
978 wdev_lock(dev->ieee80211_ptr);
979 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
980 wdev_unlock(dev->ieee80211_ptr);
981
982 return err;
983}
984
985void cfg80211_sme_disassoc(struct net_device *dev, int idx)
986{
987 struct wireless_dev *wdev = dev->ieee80211_ptr;
988 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
989 u8 bssid[ETH_ALEN];
990
991 ASSERT_WDEV_LOCK(wdev);
992
993 if (!wdev->conn)
994 return;
995
996 if (wdev->conn->state == CFG80211_CONN_IDLE)
997 return;
998
999 /*
1000 * Ok, so the association was made by this SME -- we don't
1001 * want it any more so deauthenticate too.
1002 */
1003
1004 if (!wdev->auth_bsses[idx])
1005 return;
1006
1007 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
1008 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
1009 NULL, 0, WLAN_REASON_DEAUTH_LEAVING,
1010 false)) {
1011 /* whatever -- assume gone anyway */
1012 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
1013 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
1014 wdev->auth_bsses[idx] = NULL;
1015 }
1016}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SME code for cfg80211
4 * both driver SME event handling and the SME implementation
5 * (for nl80211's connect() and wext)
6 *
7 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2009, 2020 Intel Corporation. All rights reserved.
9 * Copyright 2017 Intel Deutschland GmbH
10 */
11
12#include <linux/etherdevice.h>
13#include <linux/if_arp.h>
14#include <linux/slab.h>
15#include <linux/workqueue.h>
16#include <linux/wireless.h>
17#include <linux/export.h>
18#include <net/iw_handler.h>
19#include <net/cfg80211.h>
20#include <net/rtnetlink.h>
21#include "nl80211.h"
22#include "reg.h"
23#include "rdev-ops.h"
24
25/*
26 * Software SME in cfg80211, using auth/assoc/deauth calls to the
27 * driver. This is for implementing nl80211's connect/disconnect
28 * and wireless extensions (if configured.)
29 */
30
31struct cfg80211_conn {
32 struct cfg80211_connect_params params;
33 /* these are sub-states of the _CONNECTING sme_state */
34 enum {
35 CFG80211_CONN_SCANNING,
36 CFG80211_CONN_SCAN_AGAIN,
37 CFG80211_CONN_AUTHENTICATE_NEXT,
38 CFG80211_CONN_AUTHENTICATING,
39 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
40 CFG80211_CONN_ASSOCIATE_NEXT,
41 CFG80211_CONN_ASSOCIATING,
42 CFG80211_CONN_ASSOC_FAILED,
43 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
44 CFG80211_CONN_DEAUTH,
45 CFG80211_CONN_ABANDON,
46 CFG80211_CONN_CONNECTED,
47 } state;
48 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
49 const u8 *ie;
50 size_t ie_len;
51 bool auto_auth, prev_bssid_valid;
52};
53
54static void cfg80211_sme_free(struct wireless_dev *wdev)
55{
56 if (!wdev->conn)
57 return;
58
59 kfree(wdev->conn->ie);
60 kfree(wdev->conn);
61 wdev->conn = NULL;
62}
63
64static int cfg80211_conn_scan(struct wireless_dev *wdev)
65{
66 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
67 struct cfg80211_scan_request *request;
68 int n_channels, err;
69
70 ASSERT_WDEV_LOCK(wdev);
71
72 if (rdev->scan_req || rdev->scan_msg)
73 return -EBUSY;
74
75 if (wdev->conn->params.channel)
76 n_channels = 1;
77 else
78 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
79
80 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
81 sizeof(request->channels[0]) * n_channels,
82 GFP_KERNEL);
83 if (!request)
84 return -ENOMEM;
85
86 if (wdev->conn->params.channel) {
87 enum nl80211_band band = wdev->conn->params.channel->band;
88 struct ieee80211_supported_band *sband =
89 wdev->wiphy->bands[band];
90
91 if (!sband) {
92 kfree(request);
93 return -EINVAL;
94 }
95 request->channels[0] = wdev->conn->params.channel;
96 request->rates[band] = (1 << sband->n_bitrates) - 1;
97 } else {
98 int i = 0, j;
99 enum nl80211_band band;
100 struct ieee80211_supported_band *bands;
101 struct ieee80211_channel *channel;
102
103 for (band = 0; band < NUM_NL80211_BANDS; band++) {
104 bands = wdev->wiphy->bands[band];
105 if (!bands)
106 continue;
107 for (j = 0; j < bands->n_channels; j++) {
108 channel = &bands->channels[j];
109 if (channel->flags & IEEE80211_CHAN_DISABLED)
110 continue;
111 request->channels[i++] = channel;
112 }
113 request->rates[band] = (1 << bands->n_bitrates) - 1;
114 }
115 n_channels = i;
116 }
117 request->n_channels = n_channels;
118 request->ssids = (void *)&request->channels[n_channels];
119 request->n_ssids = 1;
120
121 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
122 wdev->conn->params.ssid_len);
123 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
124
125 eth_broadcast_addr(request->bssid);
126
127 request->wdev = wdev;
128 request->wiphy = &rdev->wiphy;
129 request->scan_start = jiffies;
130
131 rdev->scan_req = request;
132
133 err = rdev_scan(rdev, request);
134 if (!err) {
135 wdev->conn->state = CFG80211_CONN_SCANNING;
136 nl80211_send_scan_start(rdev, wdev);
137 dev_hold(wdev->netdev);
138 } else {
139 rdev->scan_req = NULL;
140 kfree(request);
141 }
142 return err;
143}
144
145static int cfg80211_conn_do_work(struct wireless_dev *wdev,
146 enum nl80211_timeout_reason *treason)
147{
148 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
149 struct cfg80211_connect_params *params;
150 struct cfg80211_assoc_request req = {};
151 int err;
152
153 ASSERT_WDEV_LOCK(wdev);
154
155 if (!wdev->conn)
156 return 0;
157
158 params = &wdev->conn->params;
159
160 switch (wdev->conn->state) {
161 case CFG80211_CONN_SCANNING:
162 /* didn't find it during scan ... */
163 return -ENOENT;
164 case CFG80211_CONN_SCAN_AGAIN:
165 return cfg80211_conn_scan(wdev);
166 case CFG80211_CONN_AUTHENTICATE_NEXT:
167 if (WARN_ON(!rdev->ops->auth))
168 return -EOPNOTSUPP;
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, NULL, 0);
177 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
178 *treason = NL80211_TIMEOUT_AUTH;
179 return -ENOTCONN;
180 case CFG80211_CONN_ASSOCIATE_NEXT:
181 if (WARN_ON(!rdev->ops->assoc))
182 return -EOPNOTSUPP;
183 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
184 if (wdev->conn->prev_bssid_valid)
185 req.prev_bssid = wdev->conn->prev_bssid;
186 req.ie = params->ie;
187 req.ie_len = params->ie_len;
188 req.use_mfp = params->mfp != NL80211_MFP_NO;
189 req.crypto = params->crypto;
190 req.flags = params->flags;
191 req.ht_capa = params->ht_capa;
192 req.ht_capa_mask = params->ht_capa_mask;
193 req.vht_capa = params->vht_capa;
194 req.vht_capa_mask = params->vht_capa_mask;
195
196 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
197 params->bssid, params->ssid,
198 params->ssid_len, &req);
199 if (err)
200 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
201 NULL, 0,
202 WLAN_REASON_DEAUTH_LEAVING,
203 false);
204 return err;
205 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
206 *treason = NL80211_TIMEOUT_ASSOC;
207 fallthrough;
208 case CFG80211_CONN_ASSOC_FAILED:
209 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
210 NULL, 0,
211 WLAN_REASON_DEAUTH_LEAVING, false);
212 return -ENOTCONN;
213 case CFG80211_CONN_DEAUTH:
214 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
215 NULL, 0,
216 WLAN_REASON_DEAUTH_LEAVING, false);
217 fallthrough;
218 case CFG80211_CONN_ABANDON:
219 /* free directly, disconnected event already sent */
220 cfg80211_sme_free(wdev);
221 return 0;
222 default:
223 return 0;
224 }
225}
226
227void cfg80211_conn_work(struct work_struct *work)
228{
229 struct cfg80211_registered_device *rdev =
230 container_of(work, struct cfg80211_registered_device, conn_work);
231 struct wireless_dev *wdev;
232 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
233 enum nl80211_timeout_reason treason;
234
235 wiphy_lock(&rdev->wiphy);
236
237 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
238 if (!wdev->netdev)
239 continue;
240
241 wdev_lock(wdev);
242 if (!netif_running(wdev->netdev)) {
243 wdev_unlock(wdev);
244 continue;
245 }
246 if (!wdev->conn ||
247 wdev->conn->state == CFG80211_CONN_CONNECTED) {
248 wdev_unlock(wdev);
249 continue;
250 }
251 if (wdev->conn->params.bssid) {
252 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
253 bssid = bssid_buf;
254 }
255 treason = NL80211_TIMEOUT_UNSPECIFIED;
256 if (cfg80211_conn_do_work(wdev, &treason)) {
257 struct cfg80211_connect_resp_params cr;
258
259 memset(&cr, 0, sizeof(cr));
260 cr.status = -1;
261 cr.bssid = bssid;
262 cr.timeout_reason = treason;
263 __cfg80211_connect_result(wdev->netdev, &cr, false);
264 }
265 wdev_unlock(wdev);
266 }
267
268 wiphy_unlock(&rdev->wiphy);
269}
270
271/* Returned bss is reference counted and must be cleaned up appropriately. */
272static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
273{
274 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
275 struct cfg80211_bss *bss;
276
277 ASSERT_WDEV_LOCK(wdev);
278
279 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
280 wdev->conn->params.bssid,
281 wdev->conn->params.ssid,
282 wdev->conn->params.ssid_len,
283 wdev->conn_bss_type,
284 IEEE80211_PRIVACY(wdev->conn->params.privacy));
285 if (!bss)
286 return NULL;
287
288 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
289 wdev->conn->params.bssid = wdev->conn->bssid;
290 wdev->conn->params.channel = bss->channel;
291 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
292 schedule_work(&rdev->conn_work);
293
294 return bss;
295}
296
297static void __cfg80211_sme_scan_done(struct net_device *dev)
298{
299 struct wireless_dev *wdev = dev->ieee80211_ptr;
300 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
301 struct cfg80211_bss *bss;
302
303 ASSERT_WDEV_LOCK(wdev);
304
305 if (!wdev->conn)
306 return;
307
308 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
309 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
310 return;
311
312 bss = cfg80211_get_conn_bss(wdev);
313 if (bss)
314 cfg80211_put_bss(&rdev->wiphy, bss);
315 else
316 schedule_work(&rdev->conn_work);
317}
318
319void cfg80211_sme_scan_done(struct net_device *dev)
320{
321 struct wireless_dev *wdev = dev->ieee80211_ptr;
322
323 wdev_lock(wdev);
324 __cfg80211_sme_scan_done(dev);
325 wdev_unlock(wdev);
326}
327
328void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
329{
330 struct wiphy *wiphy = wdev->wiphy;
331 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
332 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
333 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
334
335 ASSERT_WDEV_LOCK(wdev);
336
337 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
338 return;
339
340 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
341 wdev->conn->auto_auth &&
342 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
343 /* select automatically between only open, shared, leap */
344 switch (wdev->conn->params.auth_type) {
345 case NL80211_AUTHTYPE_OPEN_SYSTEM:
346 if (wdev->connect_keys)
347 wdev->conn->params.auth_type =
348 NL80211_AUTHTYPE_SHARED_KEY;
349 else
350 wdev->conn->params.auth_type =
351 NL80211_AUTHTYPE_NETWORK_EAP;
352 break;
353 case NL80211_AUTHTYPE_SHARED_KEY:
354 wdev->conn->params.auth_type =
355 NL80211_AUTHTYPE_NETWORK_EAP;
356 break;
357 default:
358 /* huh? */
359 wdev->conn->params.auth_type =
360 NL80211_AUTHTYPE_OPEN_SYSTEM;
361 break;
362 }
363 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
364 schedule_work(&rdev->conn_work);
365 } else if (status_code != WLAN_STATUS_SUCCESS) {
366 struct cfg80211_connect_resp_params cr;
367
368 memset(&cr, 0, sizeof(cr));
369 cr.status = status_code;
370 cr.bssid = mgmt->bssid;
371 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
372 __cfg80211_connect_result(wdev->netdev, &cr, false);
373 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
374 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
375 schedule_work(&rdev->conn_work);
376 }
377}
378
379bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
380{
381 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
382
383 if (!wdev->conn)
384 return false;
385
386 if (status == WLAN_STATUS_SUCCESS) {
387 wdev->conn->state = CFG80211_CONN_CONNECTED;
388 return false;
389 }
390
391 if (wdev->conn->prev_bssid_valid) {
392 /*
393 * Some stupid APs don't accept reassoc, so we
394 * need to fall back to trying regular assoc;
395 * return true so no event is sent to userspace.
396 */
397 wdev->conn->prev_bssid_valid = false;
398 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
399 schedule_work(&rdev->conn_work);
400 return true;
401 }
402
403 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
404 schedule_work(&rdev->conn_work);
405 return false;
406}
407
408void cfg80211_sme_deauth(struct wireless_dev *wdev)
409{
410 cfg80211_sme_free(wdev);
411}
412
413void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
414{
415 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
416
417 if (!wdev->conn)
418 return;
419
420 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
421 schedule_work(&rdev->conn_work);
422}
423
424void cfg80211_sme_disassoc(struct wireless_dev *wdev)
425{
426 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
427
428 if (!wdev->conn)
429 return;
430
431 wdev->conn->state = CFG80211_CONN_DEAUTH;
432 schedule_work(&rdev->conn_work);
433}
434
435void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
436{
437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
438
439 if (!wdev->conn)
440 return;
441
442 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
443 schedule_work(&rdev->conn_work);
444}
445
446void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
447{
448 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
449
450 if (!wdev->conn)
451 return;
452
453 wdev->conn->state = CFG80211_CONN_ABANDON;
454 schedule_work(&rdev->conn_work);
455}
456
457static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
458 const u8 *ies, size_t ies_len,
459 const u8 **out_ies, size_t *out_ies_len)
460{
461 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
462 u8 *buf;
463 size_t offs;
464
465 if (!rdev->wiphy.extended_capabilities_len ||
466 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
467 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
468 if (!*out_ies)
469 return -ENOMEM;
470 *out_ies_len = ies_len;
471 return 0;
472 }
473
474 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
475 GFP_KERNEL);
476 if (!buf)
477 return -ENOMEM;
478
479 if (ies_len) {
480 static const u8 before_extcapa[] = {
481 /* not listing IEs expected to be created by driver */
482 WLAN_EID_RSN,
483 WLAN_EID_QOS_CAPA,
484 WLAN_EID_RRM_ENABLED_CAPABILITIES,
485 WLAN_EID_MOBILITY_DOMAIN,
486 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
487 WLAN_EID_BSS_COEX_2040,
488 };
489
490 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
491 ARRAY_SIZE(before_extcapa), 0);
492 memcpy(buf, ies, offs);
493 /* leave a whole for extended capabilities IE */
494 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
495 ies + offs, ies_len - offs);
496 } else {
497 offs = 0;
498 }
499
500 /* place extended capabilities IE (with only driver capabilities) */
501 buf[offs] = WLAN_EID_EXT_CAPABILITY;
502 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
503 memcpy(buf + offs + 2,
504 rdev->wiphy.extended_capabilities,
505 rdev->wiphy.extended_capabilities_len);
506
507 *out_ies = buf;
508 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
509
510 return 0;
511}
512
513static int cfg80211_sme_connect(struct wireless_dev *wdev,
514 struct cfg80211_connect_params *connect,
515 const u8 *prev_bssid)
516{
517 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
518 struct cfg80211_bss *bss;
519 int err;
520
521 if (!rdev->ops->auth || !rdev->ops->assoc)
522 return -EOPNOTSUPP;
523
524 if (wdev->current_bss) {
525 cfg80211_unhold_bss(wdev->current_bss);
526 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
527 wdev->current_bss = NULL;
528
529 cfg80211_sme_free(wdev);
530 }
531
532 if (wdev->conn)
533 return -EINPROGRESS;
534
535 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
536 if (!wdev->conn)
537 return -ENOMEM;
538
539 /*
540 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
541 */
542 memcpy(&wdev->conn->params, connect, sizeof(*connect));
543 if (connect->bssid) {
544 wdev->conn->params.bssid = wdev->conn->bssid;
545 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
546 }
547
548 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
549 &wdev->conn->ie,
550 &wdev->conn->params.ie_len)) {
551 kfree(wdev->conn);
552 wdev->conn = NULL;
553 return -ENOMEM;
554 }
555 wdev->conn->params.ie = wdev->conn->ie;
556
557 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
558 wdev->conn->auto_auth = true;
559 /* start with open system ... should mostly work */
560 wdev->conn->params.auth_type =
561 NL80211_AUTHTYPE_OPEN_SYSTEM;
562 } else {
563 wdev->conn->auto_auth = false;
564 }
565
566 wdev->conn->params.ssid = wdev->ssid;
567 wdev->conn->params.ssid_len = wdev->ssid_len;
568
569 /* see if we have the bss already */
570 bss = cfg80211_get_conn_bss(wdev);
571
572 if (prev_bssid) {
573 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
574 wdev->conn->prev_bssid_valid = true;
575 }
576
577 /* we're good if we have a matching bss struct */
578 if (bss) {
579 enum nl80211_timeout_reason treason;
580
581 err = cfg80211_conn_do_work(wdev, &treason);
582 cfg80211_put_bss(wdev->wiphy, bss);
583 } else {
584 /* otherwise we'll need to scan for the AP first */
585 err = cfg80211_conn_scan(wdev);
586
587 /*
588 * If we can't scan right now, then we need to scan again
589 * after the current scan finished, since the parameters
590 * changed (unless we find a good AP anyway).
591 */
592 if (err == -EBUSY) {
593 err = 0;
594 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
595 }
596 }
597
598 if (err)
599 cfg80211_sme_free(wdev);
600
601 return err;
602}
603
604static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
605{
606 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
607 int err;
608
609 if (!wdev->conn)
610 return 0;
611
612 if (!rdev->ops->deauth)
613 return -EOPNOTSUPP;
614
615 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
616 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
617 err = 0;
618 goto out;
619 }
620
621 /* wdev->conn->params.bssid must be set if > SCANNING */
622 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
623 wdev->conn->params.bssid,
624 NULL, 0, reason, false);
625 out:
626 cfg80211_sme_free(wdev);
627 return err;
628}
629
630/*
631 * code shared for in-device and software SME
632 */
633
634static bool cfg80211_is_all_idle(void)
635{
636 struct cfg80211_registered_device *rdev;
637 struct wireless_dev *wdev;
638 bool is_all_idle = true;
639
640 /*
641 * All devices must be idle as otherwise if you are actively
642 * scanning some new beacon hints could be learned and would
643 * count as new regulatory hints.
644 * Also if there is any other active beaconing interface we
645 * need not issue a disconnect hint and reset any info such
646 * as chan dfs state, etc.
647 */
648 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
649 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
650 wdev_lock(wdev);
651 if (wdev->conn || wdev->current_bss ||
652 cfg80211_beaconing_iface_active(wdev))
653 is_all_idle = false;
654 wdev_unlock(wdev);
655 }
656 }
657
658 return is_all_idle;
659}
660
661static void disconnect_work(struct work_struct *work)
662{
663 rtnl_lock();
664 if (cfg80211_is_all_idle())
665 regulatory_hint_disconnect();
666 rtnl_unlock();
667}
668
669DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
670
671
672/*
673 * API calls for drivers implementing connect/disconnect and
674 * SME event handling
675 */
676
677/* This method must consume bss one way or another */
678void __cfg80211_connect_result(struct net_device *dev,
679 struct cfg80211_connect_resp_params *cr,
680 bool wextev)
681{
682 struct wireless_dev *wdev = dev->ieee80211_ptr;
683 const u8 *country_ie;
684#ifdef CONFIG_CFG80211_WEXT
685 union iwreq_data wrqu;
686#endif
687
688 ASSERT_WDEV_LOCK(wdev);
689
690 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
691 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
692 cfg80211_put_bss(wdev->wiphy, cr->bss);
693 return;
694 }
695
696 wdev->unprot_beacon_reported = 0;
697 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
698 GFP_KERNEL);
699
700#ifdef CONFIG_CFG80211_WEXT
701 if (wextev) {
702 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
703 memset(&wrqu, 0, sizeof(wrqu));
704 wrqu.data.length = cr->req_ie_len;
705 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
706 cr->req_ie);
707 }
708
709 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
710 memset(&wrqu, 0, sizeof(wrqu));
711 wrqu.data.length = cr->resp_ie_len;
712 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
713 cr->resp_ie);
714 }
715
716 memset(&wrqu, 0, sizeof(wrqu));
717 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
718 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
719 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
720 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
721 wdev->wext.prev_bssid_valid = true;
722 }
723 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
724 }
725#endif
726
727 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
728 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
729 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
730 wdev->ssid, wdev->ssid_len,
731 wdev->conn_bss_type,
732 IEEE80211_PRIVACY_ANY);
733 if (cr->bss)
734 cfg80211_hold_bss(bss_from_pub(cr->bss));
735 }
736
737 if (wdev->current_bss) {
738 cfg80211_unhold_bss(wdev->current_bss);
739 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
740 wdev->current_bss = NULL;
741 }
742
743 if (cr->status != WLAN_STATUS_SUCCESS) {
744 kfree_sensitive(wdev->connect_keys);
745 wdev->connect_keys = NULL;
746 wdev->ssid_len = 0;
747 wdev->conn_owner_nlportid = 0;
748 if (cr->bss) {
749 cfg80211_unhold_bss(bss_from_pub(cr->bss));
750 cfg80211_put_bss(wdev->wiphy, cr->bss);
751 }
752 cfg80211_sme_free(wdev);
753 return;
754 }
755
756 if (WARN_ON(!cr->bss))
757 return;
758
759 wdev->current_bss = bss_from_pub(cr->bss);
760
761 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
762 cfg80211_upload_connect_keys(wdev);
763
764 rcu_read_lock();
765 country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
766 if (!country_ie) {
767 rcu_read_unlock();
768 return;
769 }
770
771 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
772 rcu_read_unlock();
773
774 if (!country_ie)
775 return;
776
777 /*
778 * ieee80211_bss_get_ie() ensures we can access:
779 * - country_ie + 2, the start of the country ie data, and
780 * - and country_ie[1] which is the IE length
781 */
782 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
783 country_ie + 2, country_ie[1]);
784 kfree(country_ie);
785}
786
787/* Consumes bss object one way or another */
788void cfg80211_connect_done(struct net_device *dev,
789 struct cfg80211_connect_resp_params *params,
790 gfp_t gfp)
791{
792 struct wireless_dev *wdev = dev->ieee80211_ptr;
793 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
794 struct cfg80211_event *ev;
795 unsigned long flags;
796 u8 *next;
797
798 if (params->bss) {
799 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
800
801 if (list_empty(&ibss->list)) {
802 struct cfg80211_bss *found = NULL, *tmp = params->bss;
803
804 found = cfg80211_get_bss(wdev->wiphy, NULL,
805 params->bss->bssid,
806 wdev->ssid, wdev->ssid_len,
807 wdev->conn_bss_type,
808 IEEE80211_PRIVACY_ANY);
809 if (found) {
810 /* The same BSS is already updated so use it
811 * instead, as it has latest info.
812 */
813 params->bss = found;
814 } else {
815 /* Update with BSS provided by driver, it will
816 * be freshly added and ref cnted, we can free
817 * the old one.
818 *
819 * signal_valid can be false, as we are not
820 * expecting the BSS to be found.
821 *
822 * keep the old timestamp to avoid confusion
823 */
824 cfg80211_bss_update(rdev, ibss, false,
825 ibss->ts);
826 }
827
828 cfg80211_put_bss(wdev->wiphy, tmp);
829 }
830 }
831
832 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
833 params->req_ie_len + params->resp_ie_len +
834 params->fils.kek_len + params->fils.pmk_len +
835 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
836 if (!ev) {
837 cfg80211_put_bss(wdev->wiphy, params->bss);
838 return;
839 }
840
841 ev->type = EVENT_CONNECT_RESULT;
842 next = ((u8 *)ev) + sizeof(*ev);
843 if (params->bssid) {
844 ev->cr.bssid = next;
845 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
846 next += ETH_ALEN;
847 }
848 if (params->req_ie_len) {
849 ev->cr.req_ie = next;
850 ev->cr.req_ie_len = params->req_ie_len;
851 memcpy((void *)ev->cr.req_ie, params->req_ie,
852 params->req_ie_len);
853 next += params->req_ie_len;
854 }
855 if (params->resp_ie_len) {
856 ev->cr.resp_ie = next;
857 ev->cr.resp_ie_len = params->resp_ie_len;
858 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
859 params->resp_ie_len);
860 next += params->resp_ie_len;
861 }
862 if (params->fils.kek_len) {
863 ev->cr.fils.kek = next;
864 ev->cr.fils.kek_len = params->fils.kek_len;
865 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
866 params->fils.kek_len);
867 next += params->fils.kek_len;
868 }
869 if (params->fils.pmk_len) {
870 ev->cr.fils.pmk = next;
871 ev->cr.fils.pmk_len = params->fils.pmk_len;
872 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
873 params->fils.pmk_len);
874 next += params->fils.pmk_len;
875 }
876 if (params->fils.pmkid) {
877 ev->cr.fils.pmkid = next;
878 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
879 WLAN_PMKID_LEN);
880 next += WLAN_PMKID_LEN;
881 }
882 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
883 if (params->fils.update_erp_next_seq_num)
884 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
885 if (params->bss)
886 cfg80211_hold_bss(bss_from_pub(params->bss));
887 ev->cr.bss = params->bss;
888 ev->cr.status = params->status;
889 ev->cr.timeout_reason = params->timeout_reason;
890
891 spin_lock_irqsave(&wdev->event_lock, flags);
892 list_add_tail(&ev->list, &wdev->event_list);
893 spin_unlock_irqrestore(&wdev->event_lock, flags);
894 queue_work(cfg80211_wq, &rdev->event_work);
895}
896EXPORT_SYMBOL(cfg80211_connect_done);
897
898/* Consumes bss object one way or another */
899void __cfg80211_roamed(struct wireless_dev *wdev,
900 struct cfg80211_roam_info *info)
901{
902#ifdef CONFIG_CFG80211_WEXT
903 union iwreq_data wrqu;
904#endif
905 ASSERT_WDEV_LOCK(wdev);
906
907 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
908 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
909 goto out;
910
911 if (WARN_ON(!wdev->current_bss))
912 goto out;
913
914 cfg80211_unhold_bss(wdev->current_bss);
915 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
916 wdev->current_bss = NULL;
917
918 if (WARN_ON(!info->bss))
919 return;
920
921 cfg80211_hold_bss(bss_from_pub(info->bss));
922 wdev->current_bss = bss_from_pub(info->bss);
923
924 wdev->unprot_beacon_reported = 0;
925 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
926 wdev->netdev, info, GFP_KERNEL);
927
928#ifdef CONFIG_CFG80211_WEXT
929 if (info->req_ie) {
930 memset(&wrqu, 0, sizeof(wrqu));
931 wrqu.data.length = info->req_ie_len;
932 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
933 &wrqu, info->req_ie);
934 }
935
936 if (info->resp_ie) {
937 memset(&wrqu, 0, sizeof(wrqu));
938 wrqu.data.length = info->resp_ie_len;
939 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
940 &wrqu, info->resp_ie);
941 }
942
943 memset(&wrqu, 0, sizeof(wrqu));
944 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
945 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
946 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
947 wdev->wext.prev_bssid_valid = true;
948 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
949#endif
950
951 return;
952out:
953 cfg80211_put_bss(wdev->wiphy, info->bss);
954}
955
956/* Consumes info->bss object one way or another */
957void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
958 gfp_t gfp)
959{
960 struct wireless_dev *wdev = dev->ieee80211_ptr;
961 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
962 struct cfg80211_event *ev;
963 unsigned long flags;
964 u8 *next;
965
966 if (!info->bss) {
967 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
968 info->bssid, wdev->ssid,
969 wdev->ssid_len,
970 wdev->conn_bss_type,
971 IEEE80211_PRIVACY_ANY);
972 }
973
974 if (WARN_ON(!info->bss))
975 return;
976
977 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
978 info->fils.kek_len + info->fils.pmk_len +
979 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
980 if (!ev) {
981 cfg80211_put_bss(wdev->wiphy, info->bss);
982 return;
983 }
984
985 ev->type = EVENT_ROAMED;
986 next = ((u8 *)ev) + sizeof(*ev);
987 if (info->req_ie_len) {
988 ev->rm.req_ie = next;
989 ev->rm.req_ie_len = info->req_ie_len;
990 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
991 next += info->req_ie_len;
992 }
993 if (info->resp_ie_len) {
994 ev->rm.resp_ie = next;
995 ev->rm.resp_ie_len = info->resp_ie_len;
996 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
997 info->resp_ie_len);
998 next += info->resp_ie_len;
999 }
1000 if (info->fils.kek_len) {
1001 ev->rm.fils.kek = next;
1002 ev->rm.fils.kek_len = info->fils.kek_len;
1003 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1004 info->fils.kek_len);
1005 next += info->fils.kek_len;
1006 }
1007 if (info->fils.pmk_len) {
1008 ev->rm.fils.pmk = next;
1009 ev->rm.fils.pmk_len = info->fils.pmk_len;
1010 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1011 info->fils.pmk_len);
1012 next += info->fils.pmk_len;
1013 }
1014 if (info->fils.pmkid) {
1015 ev->rm.fils.pmkid = next;
1016 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1017 WLAN_PMKID_LEN);
1018 next += WLAN_PMKID_LEN;
1019 }
1020 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1021 if (info->fils.update_erp_next_seq_num)
1022 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1023 ev->rm.bss = info->bss;
1024
1025 spin_lock_irqsave(&wdev->event_lock, flags);
1026 list_add_tail(&ev->list, &wdev->event_list);
1027 spin_unlock_irqrestore(&wdev->event_lock, flags);
1028 queue_work(cfg80211_wq, &rdev->event_work);
1029}
1030EXPORT_SYMBOL(cfg80211_roamed);
1031
1032void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1033{
1034 ASSERT_WDEV_LOCK(wdev);
1035
1036 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
1037 return;
1038
1039 if (WARN_ON(!wdev->current_bss) ||
1040 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
1041 return;
1042
1043 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1044 bssid);
1045}
1046
1047void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1048 gfp_t gfp)
1049{
1050 struct wireless_dev *wdev = dev->ieee80211_ptr;
1051 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1052 struct cfg80211_event *ev;
1053 unsigned long flags;
1054
1055 if (WARN_ON(!bssid))
1056 return;
1057
1058 ev = kzalloc(sizeof(*ev), gfp);
1059 if (!ev)
1060 return;
1061
1062 ev->type = EVENT_PORT_AUTHORIZED;
1063 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1064
1065 /*
1066 * Use the wdev event list so that if there are pending
1067 * connected/roamed events, they will be reported first.
1068 */
1069 spin_lock_irqsave(&wdev->event_lock, flags);
1070 list_add_tail(&ev->list, &wdev->event_list);
1071 spin_unlock_irqrestore(&wdev->event_lock, flags);
1072 queue_work(cfg80211_wq, &rdev->event_work);
1073}
1074EXPORT_SYMBOL(cfg80211_port_authorized);
1075
1076void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1077 size_t ie_len, u16 reason, bool from_ap)
1078{
1079 struct wireless_dev *wdev = dev->ieee80211_ptr;
1080 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1081 int i;
1082#ifdef CONFIG_CFG80211_WEXT
1083 union iwreq_data wrqu;
1084#endif
1085
1086 ASSERT_WDEV_LOCK(wdev);
1087
1088 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1089 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1090 return;
1091
1092 if (wdev->current_bss) {
1093 cfg80211_unhold_bss(wdev->current_bss);
1094 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1095 }
1096
1097 wdev->current_bss = NULL;
1098 wdev->ssid_len = 0;
1099 wdev->conn_owner_nlportid = 0;
1100 kfree_sensitive(wdev->connect_keys);
1101 wdev->connect_keys = NULL;
1102
1103 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1104
1105 /* stop critical protocol if supported */
1106 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1107 rdev->crit_proto_nlportid = 0;
1108 rdev_crit_proto_stop(rdev, wdev);
1109 }
1110
1111 /*
1112 * Delete all the keys ... pairwise keys can't really
1113 * exist any more anyway, but default keys might.
1114 */
1115 if (rdev->ops->del_key) {
1116 int max_key_idx = 5;
1117
1118 if (wiphy_ext_feature_isset(
1119 wdev->wiphy,
1120 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1121 wiphy_ext_feature_isset(
1122 wdev->wiphy,
1123 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1124 max_key_idx = 7;
1125 for (i = 0; i <= max_key_idx; i++)
1126 rdev_del_key(rdev, dev, i, false, NULL);
1127 }
1128
1129 rdev_set_qos_map(rdev, dev, NULL);
1130
1131#ifdef CONFIG_CFG80211_WEXT
1132 memset(&wrqu, 0, sizeof(wrqu));
1133 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1134 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1135 wdev->wext.connect.ssid_len = 0;
1136#endif
1137
1138 schedule_work(&cfg80211_disconnect_work);
1139}
1140
1141void cfg80211_disconnected(struct net_device *dev, u16 reason,
1142 const u8 *ie, size_t ie_len,
1143 bool locally_generated, gfp_t gfp)
1144{
1145 struct wireless_dev *wdev = dev->ieee80211_ptr;
1146 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1147 struct cfg80211_event *ev;
1148 unsigned long flags;
1149
1150 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1151 if (!ev)
1152 return;
1153
1154 ev->type = EVENT_DISCONNECTED;
1155 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1156 ev->dc.ie_len = ie_len;
1157 memcpy((void *)ev->dc.ie, ie, ie_len);
1158 ev->dc.reason = reason;
1159 ev->dc.locally_generated = locally_generated;
1160
1161 spin_lock_irqsave(&wdev->event_lock, flags);
1162 list_add_tail(&ev->list, &wdev->event_list);
1163 spin_unlock_irqrestore(&wdev->event_lock, flags);
1164 queue_work(cfg80211_wq, &rdev->event_work);
1165}
1166EXPORT_SYMBOL(cfg80211_disconnected);
1167
1168/*
1169 * API calls for nl80211/wext compatibility code
1170 */
1171int cfg80211_connect(struct cfg80211_registered_device *rdev,
1172 struct net_device *dev,
1173 struct cfg80211_connect_params *connect,
1174 struct cfg80211_cached_keys *connkeys,
1175 const u8 *prev_bssid)
1176{
1177 struct wireless_dev *wdev = dev->ieee80211_ptr;
1178 int err;
1179
1180 ASSERT_WDEV_LOCK(wdev);
1181
1182 /*
1183 * If we have an ssid_len, we're trying to connect or are
1184 * already connected, so reject a new SSID unless it's the
1185 * same (which is the case for re-association.)
1186 */
1187 if (wdev->ssid_len &&
1188 (wdev->ssid_len != connect->ssid_len ||
1189 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1190 return -EALREADY;
1191
1192 /*
1193 * If connected, reject (re-)association unless prev_bssid
1194 * matches the current BSSID.
1195 */
1196 if (wdev->current_bss) {
1197 if (!prev_bssid)
1198 return -EALREADY;
1199 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1200 return -ENOTCONN;
1201 }
1202
1203 /*
1204 * Reject if we're in the process of connecting with WEP,
1205 * this case isn't very interesting and trying to handle
1206 * it would make the code much more complex.
1207 */
1208 if (wdev->connect_keys)
1209 return -EINPROGRESS;
1210
1211 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1212 rdev->wiphy.ht_capa_mod_mask);
1213 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1214 rdev->wiphy.vht_capa_mod_mask);
1215
1216 if (connkeys && connkeys->def >= 0) {
1217 int idx;
1218 u32 cipher;
1219
1220 idx = connkeys->def;
1221 cipher = connkeys->params[idx].cipher;
1222 /* If given a WEP key we may need it for shared key auth */
1223 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1224 cipher == WLAN_CIPHER_SUITE_WEP104) {
1225 connect->key_idx = idx;
1226 connect->key = connkeys->params[idx].key;
1227 connect->key_len = connkeys->params[idx].key_len;
1228
1229 /*
1230 * If ciphers are not set (e.g. when going through
1231 * iwconfig), we have to set them appropriately here.
1232 */
1233 if (connect->crypto.cipher_group == 0)
1234 connect->crypto.cipher_group = cipher;
1235
1236 if (connect->crypto.n_ciphers_pairwise == 0) {
1237 connect->crypto.n_ciphers_pairwise = 1;
1238 connect->crypto.ciphers_pairwise[0] = cipher;
1239 }
1240 }
1241
1242 connect->crypto.wep_keys = connkeys->params;
1243 connect->crypto.wep_tx_key = connkeys->def;
1244 } else {
1245 if (WARN_ON(connkeys))
1246 return -EINVAL;
1247 }
1248
1249 wdev->connect_keys = connkeys;
1250 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1251 wdev->ssid_len = connect->ssid_len;
1252
1253 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1254 IEEE80211_BSS_TYPE_ESS;
1255
1256 if (!rdev->ops->connect)
1257 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1258 else
1259 err = rdev_connect(rdev, dev, connect);
1260
1261 if (err) {
1262 wdev->connect_keys = NULL;
1263 /*
1264 * This could be reassoc getting refused, don't clear
1265 * ssid_len in that case.
1266 */
1267 if (!wdev->current_bss)
1268 wdev->ssid_len = 0;
1269 return err;
1270 }
1271
1272 return 0;
1273}
1274
1275int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1276 struct net_device *dev, u16 reason, bool wextev)
1277{
1278 struct wireless_dev *wdev = dev->ieee80211_ptr;
1279 int err = 0;
1280
1281 ASSERT_WDEV_LOCK(wdev);
1282
1283 kfree_sensitive(wdev->connect_keys);
1284 wdev->connect_keys = NULL;
1285
1286 wdev->conn_owner_nlportid = 0;
1287
1288 if (wdev->conn)
1289 err = cfg80211_sme_disconnect(wdev, reason);
1290 else if (!rdev->ops->disconnect)
1291 cfg80211_mlme_down(rdev, dev);
1292 else if (wdev->ssid_len)
1293 err = rdev_disconnect(rdev, dev, reason);
1294
1295 /*
1296 * Clear ssid_len unless we actually were fully connected,
1297 * in which case cfg80211_disconnected() will take care of
1298 * this later.
1299 */
1300 if (!wdev->current_bss)
1301 wdev->ssid_len = 0;
1302
1303 return err;
1304}
1305
1306/*
1307 * Used to clean up after the connection / connection attempt owner socket
1308 * disconnects
1309 */
1310void cfg80211_autodisconnect_wk(struct work_struct *work)
1311{
1312 struct wireless_dev *wdev =
1313 container_of(work, struct wireless_dev, disconnect_wk);
1314 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1315
1316 wdev_lock(wdev);
1317
1318 if (wdev->conn_owner_nlportid) {
1319 switch (wdev->iftype) {
1320 case NL80211_IFTYPE_ADHOC:
1321 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1322 break;
1323 case NL80211_IFTYPE_AP:
1324 case NL80211_IFTYPE_P2P_GO:
1325 __cfg80211_stop_ap(rdev, wdev->netdev, false);
1326 break;
1327 case NL80211_IFTYPE_MESH_POINT:
1328 __cfg80211_leave_mesh(rdev, wdev->netdev);
1329 break;
1330 case NL80211_IFTYPE_STATION:
1331 case NL80211_IFTYPE_P2P_CLIENT:
1332 /*
1333 * Use disconnect_bssid if still connecting and
1334 * ops->disconnect not implemented. Otherwise we can
1335 * use cfg80211_disconnect.
1336 */
1337 if (rdev->ops->disconnect || wdev->current_bss)
1338 cfg80211_disconnect(rdev, wdev->netdev,
1339 WLAN_REASON_DEAUTH_LEAVING,
1340 true);
1341 else
1342 cfg80211_mlme_deauth(rdev, wdev->netdev,
1343 wdev->disconnect_bssid,
1344 NULL, 0,
1345 WLAN_REASON_DEAUTH_LEAVING,
1346 false);
1347 break;
1348 default:
1349 break;
1350 }
1351 }
1352
1353 wdev_unlock(wdev);
1354}