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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / net / wireless / sme.c
blob7b9ecaed96bef13aab274b5cd3686dd2487096ac
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 <linux/export.h>
14 #include <net/iw_handler.h>
15 #include <net/cfg80211.h>
16 #include <net/rtnetlink.h>
17 #include "nl80211.h"
18 #include "reg.h"
19
20 struct cfg80211_conn {
21 struct cfg80211_connect_params params;
22 /* these are sub-states of the _CONNECTING sme_state */
23 enum {
24 CFG80211_CONN_IDLE,
25 CFG80211_CONN_SCANNING,
26 CFG80211_CONN_SCAN_AGAIN,
27 CFG80211_CONN_AUTHENTICATE_NEXT,
28 CFG80211_CONN_AUTHENTICATING,
29 CFG80211_CONN_ASSOCIATE_NEXT,
30 CFG80211_CONN_ASSOCIATING,
31 CFG80211_CONN_DEAUTH_ASSOC_FAIL,
32 } state;
33 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
34 u8 *ie;
35 size_t ie_len;
36 bool auto_auth, prev_bssid_valid;
37 };
38
39 static bool cfg80211_is_all_idle(void)
40 {
41 struct cfg80211_registered_device *rdev;
42 struct wireless_dev *wdev;
43 bool is_all_idle = true;
44
45 mutex_lock(&cfg80211_mutex);
46
47 /*
48 * All devices must be idle as otherwise if you are actively
49 * scanning some new beacon hints could be learned and would
50 * count as new regulatory hints.
51 */
52 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
53 cfg80211_lock_rdev(rdev);
54 list_for_each_entry(wdev, &rdev->netdev_list, list) {
55 wdev_lock(wdev);
56 if (wdev->sme_state != CFG80211_SME_IDLE)
57 is_all_idle = false;
58 wdev_unlock(wdev);
59 }
60 cfg80211_unlock_rdev(rdev);
61 }
62
63 mutex_unlock(&cfg80211_mutex);
64
65 return is_all_idle;
66 }
67
68 static void disconnect_work(struct work_struct *work)
69 {
70 if (!cfg80211_is_all_idle())
71 return;
72
73 regulatory_hint_disconnect();
74 }
75
76 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
77
78 static int cfg80211_conn_scan(struct wireless_dev *wdev)
79 {
80 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
81 struct cfg80211_scan_request *request;
82 int n_channels, err;
83
84 ASSERT_RTNL();
85 ASSERT_RDEV_LOCK(rdev);
86 ASSERT_WDEV_LOCK(wdev);
87
88 if (rdev->scan_req)
89 return -EBUSY;
90
91 if (wdev->conn->params.channel) {
92 n_channels = 1;
93 } else {
94 enum ieee80211_band band;
95 n_channels = 0;
96
97 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
98 if (!wdev->wiphy->bands[band])
99 continue;
100 n_channels += wdev->wiphy->bands[band]->n_channels;
101 }
102 }
103 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
104 sizeof(request->channels[0]) * n_channels,
105 GFP_KERNEL);
106 if (!request)
107 return -ENOMEM;
108
109 if (wdev->conn->params.channel)
110 request->channels[0] = wdev->conn->params.channel;
111 else {
112 int i = 0, j;
113 enum ieee80211_band band;
114 struct ieee80211_supported_band *bands;
115 struct ieee80211_channel *channel;
116
117 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
118 bands = wdev->wiphy->bands[band];
119 if (!bands)
120 continue;
121 for (j = 0; j < bands->n_channels; j++) {
122 channel = &bands->channels[j];
123 if (channel->flags & IEEE80211_CHAN_DISABLED)
124 continue;
125 request->channels[i++] = channel;
126 }
127 request->rates[band] = (1 << bands->n_bitrates) - 1;
128 }
129 n_channels = i;
130 }
131 request->n_channels = n_channels;
132 request->ssids = (void *)&request->channels[n_channels];
133 request->n_ssids = 1;
134
135 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
136 wdev->conn->params.ssid_len);
137 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
138
139 request->dev = wdev->netdev;
140 request->wiphy = &rdev->wiphy;
141
142 rdev->scan_req = request;
143
144 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
145 if (!err) {
146 wdev->conn->state = CFG80211_CONN_SCANNING;
147 nl80211_send_scan_start(rdev, wdev->netdev);
148 dev_hold(wdev->netdev);
149 } else {
150 rdev->scan_req = NULL;
151 kfree(request);
152 }
153 return err;
154 }
155
156 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
157 {
158 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
159 struct cfg80211_connect_params *params;
160 const u8 *prev_bssid = NULL;
161 int err;
162
163 ASSERT_WDEV_LOCK(wdev);
164
165 if (!wdev->conn)
166 return 0;
167
168 params = &wdev->conn->params;
169
170 switch (wdev->conn->state) {
171 case CFG80211_CONN_SCAN_AGAIN:
172 return cfg80211_conn_scan(wdev);
173 case CFG80211_CONN_AUTHENTICATE_NEXT:
174 BUG_ON(!rdev->ops->auth);
175 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
176 return __cfg80211_mlme_auth(rdev, wdev->netdev,
177 params->channel, params->auth_type,
178 params->bssid,
179 params->ssid, params->ssid_len,
180 NULL, 0,
181 params->key, params->key_len,
182 params->key_idx, false);
183 case CFG80211_CONN_ASSOCIATE_NEXT:
184 BUG_ON(!rdev->ops->assoc);
185 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
186 if (wdev->conn->prev_bssid_valid)
187 prev_bssid = wdev->conn->prev_bssid;
188 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
189 params->channel, params->bssid,
190 prev_bssid,
191 params->ssid, params->ssid_len,
192 params->ie, params->ie_len,
193 false, &params->crypto,
194 params->flags, &params->ht_capa,
195 &params->ht_capa_mask);
196 if (err)
197 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
198 NULL, 0,
199 WLAN_REASON_DEAUTH_LEAVING,
200 false);
201 return err;
202 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
203 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
204 NULL, 0,
205 WLAN_REASON_DEAUTH_LEAVING, false);
206 /* return an error so that we call __cfg80211_connect_result() */
207 return -EINVAL;
208 default:
209 return 0;
210 }
211 }
212
213 void cfg80211_conn_work(struct work_struct *work)
214 {
215 struct cfg80211_registered_device *rdev =
216 container_of(work, struct cfg80211_registered_device, conn_work);
217 struct wireless_dev *wdev;
218 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
219
220 rtnl_lock();
221 cfg80211_lock_rdev(rdev);
222 mutex_lock(&rdev->devlist_mtx);
223
224 list_for_each_entry(wdev, &rdev->netdev_list, list) {
225 wdev_lock(wdev);
226 if (!netif_running(wdev->netdev)) {
227 wdev_unlock(wdev);
228 continue;
229 }
230 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
231 wdev_unlock(wdev);
232 continue;
233 }
234 if (wdev->conn->params.bssid) {
235 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
236 bssid = bssid_buf;
237 }
238 if (cfg80211_conn_do_work(wdev))
239 __cfg80211_connect_result(
240 wdev->netdev, bssid,
241 NULL, 0, NULL, 0,
242 WLAN_STATUS_UNSPECIFIED_FAILURE,
243 false, NULL);
244 wdev_unlock(wdev);
245 }
246
247 mutex_unlock(&rdev->devlist_mtx);
248 cfg80211_unlock_rdev(rdev);
249 rtnl_unlock();
250 }
251
252 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
253 {
254 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
255 struct cfg80211_bss *bss;
256 u16 capa = WLAN_CAPABILITY_ESS;
257
258 ASSERT_WDEV_LOCK(wdev);
259
260 if (wdev->conn->params.privacy)
261 capa |= WLAN_CAPABILITY_PRIVACY;
262
263 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
264 wdev->conn->params.bssid,
265 wdev->conn->params.ssid,
266 wdev->conn->params.ssid_len,
267 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
268 capa);
269 if (!bss)
270 return NULL;
271
272 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
273 wdev->conn->params.bssid = wdev->conn->bssid;
274 wdev->conn->params.channel = bss->channel;
275 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
276 schedule_work(&rdev->conn_work);
277
278 return bss;
279 }
280
281 static void __cfg80211_sme_scan_done(struct net_device *dev)
282 {
283 struct wireless_dev *wdev = dev->ieee80211_ptr;
284 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
285 struct cfg80211_bss *bss;
286
287 ASSERT_WDEV_LOCK(wdev);
288
289 if (wdev->sme_state != CFG80211_SME_CONNECTING)
290 return;
291
292 if (!wdev->conn)
293 return;
294
295 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
296 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
297 return;
298
299 bss = cfg80211_get_conn_bss(wdev);
300 if (bss) {
301 cfg80211_put_bss(bss);
302 } else {
303 /* not found */
304 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
305 schedule_work(&rdev->conn_work);
306 else
307 __cfg80211_connect_result(
308 wdev->netdev,
309 wdev->conn->params.bssid,
310 NULL, 0, NULL, 0,
311 WLAN_STATUS_UNSPECIFIED_FAILURE,
312 false, NULL);
313 }
314 }
315
316 void cfg80211_sme_scan_done(struct net_device *dev)
317 {
318 struct wireless_dev *wdev = dev->ieee80211_ptr;
319
320 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
321 wdev_lock(wdev);
322 __cfg80211_sme_scan_done(dev);
323 wdev_unlock(wdev);
324 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
325 }
326
327 void cfg80211_sme_rx_auth(struct net_device *dev,
328 const u8 *buf, size_t len)
329 {
330 struct wireless_dev *wdev = dev->ieee80211_ptr;
331 struct wiphy *wiphy = wdev->wiphy;
332 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
333 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
334 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
335
336 ASSERT_WDEV_LOCK(wdev);
337
338 /* should only RX auth frames when connecting */
339 if (wdev->sme_state != CFG80211_SME_CONNECTING)
340 return;
341
342 if (WARN_ON(!wdev->conn))
343 return;
344
345 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
346 wdev->conn->auto_auth &&
347 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
348 /* select automatically between only open, shared, leap */
349 switch (wdev->conn->params.auth_type) {
350 case NL80211_AUTHTYPE_OPEN_SYSTEM:
351 if (wdev->connect_keys)
352 wdev->conn->params.auth_type =
353 NL80211_AUTHTYPE_SHARED_KEY;
354 else
355 wdev->conn->params.auth_type =
356 NL80211_AUTHTYPE_NETWORK_EAP;
357 break;
358 case NL80211_AUTHTYPE_SHARED_KEY:
359 wdev->conn->params.auth_type =
360 NL80211_AUTHTYPE_NETWORK_EAP;
361 break;
362 default:
363 /* huh? */
364 wdev->conn->params.auth_type =
365 NL80211_AUTHTYPE_OPEN_SYSTEM;
366 break;
367 }
368 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
369 schedule_work(&rdev->conn_work);
370 } else if (status_code != WLAN_STATUS_SUCCESS) {
371 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
372 status_code, false, NULL);
373 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
374 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
375 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
376 schedule_work(&rdev->conn_work);
377 }
378 }
379
380 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
381 {
382 struct wiphy *wiphy = wdev->wiphy;
383 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
384
385 if (WARN_ON(!wdev->conn))
386 return false;
387
388 if (!wdev->conn->prev_bssid_valid)
389 return false;
390
391 /*
392 * Some stupid APs don't accept reassoc, so we
393 * need to fall back to trying regular assoc.
394 */
395 wdev->conn->prev_bssid_valid = false;
396 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
397 schedule_work(&rdev->conn_work);
398
399 return true;
400 }
401
402 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
403 {
404 struct wiphy *wiphy = wdev->wiphy;
405 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
406
407 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
408 schedule_work(&rdev->conn_work);
409 }
410
411 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
412 const u8 *req_ie, size_t req_ie_len,
413 const u8 *resp_ie, size_t resp_ie_len,
414 u16 status, bool wextev,
415 struct cfg80211_bss *bss)
416 {
417 struct wireless_dev *wdev = dev->ieee80211_ptr;
418 u8 *country_ie;
419 #ifdef CONFIG_CFG80211_WEXT
420 union iwreq_data wrqu;
421 #endif
422
423 ASSERT_WDEV_LOCK(wdev);
424
425 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
426 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
427 return;
428
429 if (wdev->sme_state != CFG80211_SME_CONNECTING)
430 return;
431
432 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
433 bssid, req_ie, req_ie_len,
434 resp_ie, resp_ie_len,
435 status, GFP_KERNEL);
436
437 #ifdef CONFIG_CFG80211_WEXT
438 if (wextev) {
439 if (req_ie && status == WLAN_STATUS_SUCCESS) {
440 memset(&wrqu, 0, sizeof(wrqu));
441 wrqu.data.length = req_ie_len;
442 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
443 }
444
445 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
446 memset(&wrqu, 0, sizeof(wrqu));
447 wrqu.data.length = resp_ie_len;
448 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
449 }
450
451 memset(&wrqu, 0, sizeof(wrqu));
452 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
453 if (bssid && status == WLAN_STATUS_SUCCESS) {
454 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
455 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
456 wdev->wext.prev_bssid_valid = true;
457 }
458 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
459 }
460 #endif
461
462 if (wdev->current_bss) {
463 cfg80211_unhold_bss(wdev->current_bss);
464 cfg80211_put_bss(&wdev->current_bss->pub);
465 wdev->current_bss = NULL;
466 }
467
468 if (wdev->conn)
469 wdev->conn->state = CFG80211_CONN_IDLE;
470
471 if (status != WLAN_STATUS_SUCCESS) {
472 wdev->sme_state = CFG80211_SME_IDLE;
473 if (wdev->conn)
474 kfree(wdev->conn->ie);
475 kfree(wdev->conn);
476 wdev->conn = NULL;
477 kfree(wdev->connect_keys);
478 wdev->connect_keys = NULL;
479 wdev->ssid_len = 0;
480 return;
481 }
482
483 if (!bss)
484 bss = cfg80211_get_bss(wdev->wiphy,
485 wdev->conn ? wdev->conn->params.channel :
486 NULL,
487 bssid,
488 wdev->ssid, wdev->ssid_len,
489 WLAN_CAPABILITY_ESS,
490 WLAN_CAPABILITY_ESS);
491
492 if (WARN_ON(!bss))
493 return;
494
495 cfg80211_hold_bss(bss_from_pub(bss));
496 wdev->current_bss = bss_from_pub(bss);
497
498 wdev->sme_state = CFG80211_SME_CONNECTED;
499 cfg80211_upload_connect_keys(wdev);
500
501 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
502
503 if (!country_ie)
504 return;
505
506 /*
507 * ieee80211_bss_get_ie() ensures we can access:
508 * - country_ie + 2, the start of the country ie data, and
509 * - and country_ie[1] which is the IE length
510 */
511 regulatory_hint_11d(wdev->wiphy,
512 bss->channel->band,
513 country_ie + 2,
514 country_ie[1]);
515 }
516
517 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
518 const u8 *req_ie, size_t req_ie_len,
519 const u8 *resp_ie, size_t resp_ie_len,
520 u16 status, gfp_t gfp)
521 {
522 struct wireless_dev *wdev = dev->ieee80211_ptr;
523 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
524 struct cfg80211_event *ev;
525 unsigned long flags;
526
527 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
528
529 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
530 if (!ev)
531 return;
532
533 ev->type = EVENT_CONNECT_RESULT;
534 if (bssid)
535 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
536 if (req_ie_len) {
537 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
538 ev->cr.req_ie_len = req_ie_len;
539 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
540 }
541 if (resp_ie_len) {
542 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
543 ev->cr.resp_ie_len = resp_ie_len;
544 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
545 }
546 ev->cr.status = status;
547
548 spin_lock_irqsave(&wdev->event_lock, flags);
549 list_add_tail(&ev->list, &wdev->event_list);
550 spin_unlock_irqrestore(&wdev->event_lock, flags);
551 queue_work(cfg80211_wq, &rdev->event_work);
552 }
553 EXPORT_SYMBOL(cfg80211_connect_result);
554
555 void __cfg80211_roamed(struct wireless_dev *wdev,
556 struct cfg80211_bss *bss,
557 const u8 *req_ie, size_t req_ie_len,
558 const u8 *resp_ie, size_t resp_ie_len)
559 {
560 #ifdef CONFIG_CFG80211_WEXT
561 union iwreq_data wrqu;
562 #endif
563 ASSERT_WDEV_LOCK(wdev);
564
565 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
566 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
567 goto out;
568
569 if (wdev->sme_state != CFG80211_SME_CONNECTED)
570 goto out;
571
572 /* internal error -- how did we get to CONNECTED w/o BSS? */
573 if (WARN_ON(!wdev->current_bss)) {
574 goto out;
575 }
576
577 cfg80211_unhold_bss(wdev->current_bss);
578 cfg80211_put_bss(&wdev->current_bss->pub);
579 wdev->current_bss = NULL;
580
581 cfg80211_hold_bss(bss_from_pub(bss));
582 wdev->current_bss = bss_from_pub(bss);
583
584 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid,
585 req_ie, req_ie_len, resp_ie, resp_ie_len,
586 GFP_KERNEL);
587
588 #ifdef CONFIG_CFG80211_WEXT
589 if (req_ie) {
590 memset(&wrqu, 0, sizeof(wrqu));
591 wrqu.data.length = req_ie_len;
592 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
593 &wrqu, req_ie);
594 }
595
596 if (resp_ie) {
597 memset(&wrqu, 0, sizeof(wrqu));
598 wrqu.data.length = resp_ie_len;
599 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
600 &wrqu, resp_ie);
601 }
602
603 memset(&wrqu, 0, sizeof(wrqu));
604 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
605 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
606 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
607 wdev->wext.prev_bssid_valid = true;
608 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
609 #endif
610
611 return;
612 out:
613 cfg80211_put_bss(bss);
614 }
615
616 void cfg80211_roamed(struct net_device *dev,
617 struct ieee80211_channel *channel,
618 const u8 *bssid,
619 const u8 *req_ie, size_t req_ie_len,
620 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
621 {
622 struct wireless_dev *wdev = dev->ieee80211_ptr;
623 struct cfg80211_bss *bss;
624
625 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
626
627 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
628 wdev->ssid_len, WLAN_CAPABILITY_ESS,
629 WLAN_CAPABILITY_ESS);
630 if (WARN_ON(!bss))
631 return;
632
633 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
634 resp_ie_len, gfp);
635 }
636 EXPORT_SYMBOL(cfg80211_roamed);
637
638 void cfg80211_roamed_bss(struct net_device *dev,
639 struct cfg80211_bss *bss, const u8 *req_ie,
640 size_t req_ie_len, const u8 *resp_ie,
641 size_t resp_ie_len, gfp_t gfp)
642 {
643 struct wireless_dev *wdev = dev->ieee80211_ptr;
644 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
645 struct cfg80211_event *ev;
646 unsigned long flags;
647
648 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
649
650 if (WARN_ON(!bss))
651 return;
652
653 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
654 if (!ev) {
655 cfg80211_put_bss(bss);
656 return;
657 }
658
659 ev->type = EVENT_ROAMED;
660 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
661 ev->rm.req_ie_len = req_ie_len;
662 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
663 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
664 ev->rm.resp_ie_len = resp_ie_len;
665 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
666 ev->rm.bss = bss;
667
668 spin_lock_irqsave(&wdev->event_lock, flags);
669 list_add_tail(&ev->list, &wdev->event_list);
670 spin_unlock_irqrestore(&wdev->event_lock, flags);
671 queue_work(cfg80211_wq, &rdev->event_work);
672 }
673 EXPORT_SYMBOL(cfg80211_roamed_bss);
674
675 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
676 size_t ie_len, u16 reason, bool from_ap)
677 {
678 struct wireless_dev *wdev = dev->ieee80211_ptr;
679 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
680 int i;
681 #ifdef CONFIG_CFG80211_WEXT
682 union iwreq_data wrqu;
683 #endif
684
685 ASSERT_WDEV_LOCK(wdev);
686
687 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
688 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
689 return;
690
691 if (wdev->sme_state != CFG80211_SME_CONNECTED)
692 return;
693
694 if (wdev->current_bss) {
695 cfg80211_unhold_bss(wdev->current_bss);
696 cfg80211_put_bss(&wdev->current_bss->pub);
697 }
698
699 wdev->current_bss = NULL;
700 wdev->sme_state = CFG80211_SME_IDLE;
701 wdev->ssid_len = 0;
702
703 if (wdev->conn) {
704 const u8 *bssid;
705 int ret;
706
707 kfree(wdev->conn->ie);
708 wdev->conn->ie = NULL;
709 kfree(wdev->conn);
710 wdev->conn = NULL;
711
712 /*
713 * If this disconnect was due to a disassoc, we
714 * we might still have an auth BSS around. For
715 * the userspace SME that's currently expected,
716 * but for the kernel SME (nl80211 CONNECT or
717 * wireless extensions) we want to clear up all
718 * state.
719 */
720 for (i = 0; i < MAX_AUTH_BSSES; i++) {
721 if (!wdev->auth_bsses[i])
722 continue;
723 bssid = wdev->auth_bsses[i]->pub.bssid;
724 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
725 WLAN_REASON_DEAUTH_LEAVING,
726 false);
727 WARN(ret, "deauth failed: %d\n", ret);
728 }
729 }
730
731 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
732
733 /*
734 * Delete all the keys ... pairwise keys can't really
735 * exist any more anyway, but default keys might.
736 */
737 if (rdev->ops->del_key)
738 for (i = 0; i < 6; i++)
739 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
740
741 #ifdef CONFIG_CFG80211_WEXT
742 memset(&wrqu, 0, sizeof(wrqu));
743 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
744 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
745 wdev->wext.connect.ssid_len = 0;
746 #endif
747
748 schedule_work(&cfg80211_disconnect_work);
749 }
750
751 void cfg80211_disconnected(struct net_device *dev, u16 reason,
752 u8 *ie, size_t ie_len, gfp_t gfp)
753 {
754 struct wireless_dev *wdev = dev->ieee80211_ptr;
755 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
756 struct cfg80211_event *ev;
757 unsigned long flags;
758
759 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
760
761 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
762 if (!ev)
763 return;
764
765 ev->type = EVENT_DISCONNECTED;
766 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
767 ev->dc.ie_len = ie_len;
768 memcpy((void *)ev->dc.ie, ie, ie_len);
769 ev->dc.reason = reason;
770
771 spin_lock_irqsave(&wdev->event_lock, flags);
772 list_add_tail(&ev->list, &wdev->event_list);
773 spin_unlock_irqrestore(&wdev->event_lock, flags);
774 queue_work(cfg80211_wq, &rdev->event_work);
775 }
776 EXPORT_SYMBOL(cfg80211_disconnected);
777
778 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
779 struct net_device *dev,
780 struct cfg80211_connect_params *connect,
781 struct cfg80211_cached_keys *connkeys,
782 const u8 *prev_bssid)
783 {
784 struct wireless_dev *wdev = dev->ieee80211_ptr;
785 struct cfg80211_bss *bss = NULL;
786 int err;
787
788 ASSERT_WDEV_LOCK(wdev);
789
790 if (wdev->sme_state != CFG80211_SME_IDLE)
791 return -EALREADY;
792
793 if (WARN_ON(wdev->connect_keys)) {
794 kfree(wdev->connect_keys);
795 wdev->connect_keys = NULL;
796 }
797
798 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
799 rdev->wiphy.ht_capa_mod_mask);
800
801 if (connkeys && connkeys->def >= 0) {
802 int idx;
803 u32 cipher;
804
805 idx = connkeys->def;
806 cipher = connkeys->params[idx].cipher;
807 /* If given a WEP key we may need it for shared key auth */
808 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
809 cipher == WLAN_CIPHER_SUITE_WEP104) {
810 connect->key_idx = idx;
811 connect->key = connkeys->params[idx].key;
812 connect->key_len = connkeys->params[idx].key_len;
813
814 /*
815 * If ciphers are not set (e.g. when going through
816 * iwconfig), we have to set them appropriately here.
817 */
818 if (connect->crypto.cipher_group == 0)
819 connect->crypto.cipher_group = cipher;
820
821 if (connect->crypto.n_ciphers_pairwise == 0) {
822 connect->crypto.n_ciphers_pairwise = 1;
823 connect->crypto.ciphers_pairwise[0] = cipher;
824 }
825 }
826 }
827
828 if (!rdev->ops->connect) {
829 if (!rdev->ops->auth || !rdev->ops->assoc)
830 return -EOPNOTSUPP;
831
832 if (WARN_ON(wdev->conn))
833 return -EINPROGRESS;
834
835 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
836 if (!wdev->conn)
837 return -ENOMEM;
838
839 /*
840 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
841 */
842 memcpy(&wdev->conn->params, connect, sizeof(*connect));
843 if (connect->bssid) {
844 wdev->conn->params.bssid = wdev->conn->bssid;
845 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
846 }
847
848 if (connect->ie) {
849 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
850 GFP_KERNEL);
851 wdev->conn->params.ie = wdev->conn->ie;
852 if (!wdev->conn->ie) {
853 kfree(wdev->conn);
854 wdev->conn = NULL;
855 return -ENOMEM;
856 }
857 }
858
859 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
860 wdev->conn->auto_auth = true;
861 /* start with open system ... should mostly work */
862 wdev->conn->params.auth_type =
863 NL80211_AUTHTYPE_OPEN_SYSTEM;
864 } else {
865 wdev->conn->auto_auth = false;
866 }
867
868 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
869 wdev->ssid_len = connect->ssid_len;
870 wdev->conn->params.ssid = wdev->ssid;
871 wdev->conn->params.ssid_len = connect->ssid_len;
872
873 /* see if we have the bss already */
874 bss = cfg80211_get_conn_bss(wdev);
875
876 wdev->sme_state = CFG80211_SME_CONNECTING;
877 wdev->connect_keys = connkeys;
878
879 if (prev_bssid) {
880 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
881 wdev->conn->prev_bssid_valid = true;
882 }
883
884 /* we're good if we have a matching bss struct */
885 if (bss) {
886 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
887 err = cfg80211_conn_do_work(wdev);
888 cfg80211_put_bss(bss);
889 } else {
890 /* otherwise we'll need to scan for the AP first */
891 err = cfg80211_conn_scan(wdev);
892 /*
893 * If we can't scan right now, then we need to scan again
894 * after the current scan finished, since the parameters
895 * changed (unless we find a good AP anyway).
896 */
897 if (err == -EBUSY) {
898 err = 0;
899 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
900 }
901 }
902 if (err) {
903 kfree(wdev->conn->ie);
904 kfree(wdev->conn);
905 wdev->conn = NULL;
906 wdev->sme_state = CFG80211_SME_IDLE;
907 wdev->connect_keys = NULL;
908 wdev->ssid_len = 0;
909 }
910
911 return err;
912 } else {
913 wdev->sme_state = CFG80211_SME_CONNECTING;
914 wdev->connect_keys = connkeys;
915 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
916 if (err) {
917 wdev->connect_keys = NULL;
918 wdev->sme_state = CFG80211_SME_IDLE;
919 return err;
920 }
921
922 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
923 wdev->ssid_len = connect->ssid_len;
924
925 return 0;
926 }
927 }
928
929 int cfg80211_connect(struct cfg80211_registered_device *rdev,
930 struct net_device *dev,
931 struct cfg80211_connect_params *connect,
932 struct cfg80211_cached_keys *connkeys)
933 {
934 int err;
935
936 mutex_lock(&rdev->devlist_mtx);
937 wdev_lock(dev->ieee80211_ptr);
938 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
939 wdev_unlock(dev->ieee80211_ptr);
940 mutex_unlock(&rdev->devlist_mtx);
941
942 return err;
943 }
944
945 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
946 struct net_device *dev, u16 reason, bool wextev)
947 {
948 struct wireless_dev *wdev = dev->ieee80211_ptr;
949 int err;
950
951 ASSERT_WDEV_LOCK(wdev);
952
953 if (wdev->sme_state == CFG80211_SME_IDLE)
954 return -EINVAL;
955
956 kfree(wdev->connect_keys);
957 wdev->connect_keys = NULL;
958
959 if (!rdev->ops->disconnect) {
960 if (!rdev->ops->deauth)
961 return -EOPNOTSUPP;
962
963 /* was it connected by userspace SME? */
964 if (!wdev->conn) {
965 cfg80211_mlme_down(rdev, dev);
966 return 0;
967 }
968
969 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
970 (wdev->conn->state == CFG80211_CONN_SCANNING ||
971 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
972 wdev->sme_state = CFG80211_SME_IDLE;
973 kfree(wdev->conn->ie);
974 kfree(wdev->conn);
975 wdev->conn = NULL;
976 wdev->ssid_len = 0;
977 return 0;
978 }
979
980 /* wdev->conn->params.bssid must be set if > SCANNING */
981 err = __cfg80211_mlme_deauth(rdev, dev,
982 wdev->conn->params.bssid,
983 NULL, 0, reason, false);
984 if (err)
985 return err;
986 } else {
987 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
988 if (err)
989 return err;
990 }
991
992 if (wdev->sme_state == CFG80211_SME_CONNECTED)
993 __cfg80211_disconnected(dev, NULL, 0, 0, false);
994 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
995 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
996 WLAN_STATUS_UNSPECIFIED_FAILURE,
997 wextev, NULL);
998
999 return 0;
1000 }
1001
1002 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1003 struct net_device *dev,
1004 u16 reason, bool wextev)
1005 {
1006 int err;
1007
1008 wdev_lock(dev->ieee80211_ptr);
1009 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
1010 wdev_unlock(dev->ieee80211_ptr);
1011
1012 return err;
1013 }
1014
1015 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
1016 {
1017 struct wireless_dev *wdev = dev->ieee80211_ptr;
1018 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
1019 u8 bssid[ETH_ALEN];
1020
1021 ASSERT_WDEV_LOCK(wdev);
1022
1023 if (!wdev->conn)
1024 return;
1025
1026 if (wdev->conn->state == CFG80211_CONN_IDLE)
1027 return;
1028
1029 /*
1030 * Ok, so the association was made by this SME -- we don't
1031 * want it any more so deauthenticate too.
1032 */
1033
1034 if (!wdev->auth_bsses[idx])
1035 return;
1036
1037 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
1038 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
1039 NULL, 0, WLAN_REASON_DEAUTH_LEAVING,
1040 false)) {
1041 /* whatever -- assume gone anyway */
1042 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
1043 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
1044 wdev->auth_bsses[idx] = NULL;
1045 }
1046 }