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Merge branch 'for-linus' of git://github.com/dtor/input
[linux-btrfs-devel.git] / net / wireless / sme.c
blobdec0fa28372e5f5363d79d0ba912cf1e37704dd9
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
19 struct 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
38 static 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
67 static void disconnect_work(struct work_struct *work)
68 {
69 if (!cfg80211_is_all_idle())
70 return;
71
72 regulatory_hint_disconnect();
73 }
74
75 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
76
77 static 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
150 static 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, &params->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
205 void 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
244 static 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
273 static 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
308 void 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
319 void 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
372 bool 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
394 void 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
403 void __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
509 void 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 }
545 EXPORT_SYMBOL(cfg80211_connect_result);
546
547 void __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
614 void 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 }
646 EXPORT_SYMBOL(cfg80211_roamed);
647
648 void __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
724 void 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 }
749 EXPORT_SYMBOL(cfg80211_disconnected);
750
751 int __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
899 int 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
915 int __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
972 int 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
985 void 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 }
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