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localmodconfig: Check if configs are already set for selects
[linux-2.6.git] / net / wireless / sme.c
blobf7e937ff897893a2dff84efcf9d8a9422aebe3b0
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);
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 cfg80211_put_bss(bss);
481 return;
482 }
483
484 if (!bss)
485 bss = cfg80211_get_bss(wdev->wiphy,
486 wdev->conn ? wdev->conn->params.channel :
487 NULL,
488 bssid,
489 wdev->ssid, wdev->ssid_len,
490 WLAN_CAPABILITY_ESS,
491 WLAN_CAPABILITY_ESS);
492
493 if (WARN_ON(!bss))
494 return;
495
496 cfg80211_hold_bss(bss_from_pub(bss));
497 wdev->current_bss = bss_from_pub(bss);
498
499 wdev->sme_state = CFG80211_SME_CONNECTED;
500 cfg80211_upload_connect_keys(wdev);
501
502 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
503
504 if (!country_ie)
505 return;
506
507 /*
508 * ieee80211_bss_get_ie() ensures we can access:
509 * - country_ie + 2, the start of the country ie data, and
510 * - and country_ie[1] which is the IE length
511 */
512 regulatory_hint_11d(wdev->wiphy,
513 bss->channel->band,
514 country_ie + 2,
515 country_ie[1]);
516 }
517
518 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
519 const u8 *req_ie, size_t req_ie_len,
520 const u8 *resp_ie, size_t resp_ie_len,
521 u16 status, gfp_t gfp)
522 {
523 struct wireless_dev *wdev = dev->ieee80211_ptr;
524 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
525 struct cfg80211_event *ev;
526 unsigned long flags;
527
528 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
529
530 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
531 if (!ev)
532 return;
533
534 ev->type = EVENT_CONNECT_RESULT;
535 if (bssid)
536 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
537 if (req_ie_len) {
538 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
539 ev->cr.req_ie_len = req_ie_len;
540 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
541 }
542 if (resp_ie_len) {
543 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
544 ev->cr.resp_ie_len = resp_ie_len;
545 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
546 }
547 ev->cr.status = status;
548
549 spin_lock_irqsave(&wdev->event_lock, flags);
550 list_add_tail(&ev->list, &wdev->event_list);
551 spin_unlock_irqrestore(&wdev->event_lock, flags);
552 queue_work(cfg80211_wq, &rdev->event_work);
553 }
554 EXPORT_SYMBOL(cfg80211_connect_result);
555
556 void __cfg80211_roamed(struct wireless_dev *wdev,
557 struct cfg80211_bss *bss,
558 const u8 *req_ie, size_t req_ie_len,
559 const u8 *resp_ie, size_t resp_ie_len)
560 {
561 #ifdef CONFIG_CFG80211_WEXT
562 union iwreq_data wrqu;
563 #endif
564 ASSERT_WDEV_LOCK(wdev);
565
566 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
567 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
568 goto out;
569
570 if (wdev->sme_state != CFG80211_SME_CONNECTED)
571 goto out;
572
573 /* internal error -- how did we get to CONNECTED w/o BSS? */
574 if (WARN_ON(!wdev->current_bss)) {
575 goto out;
576 }
577
578 cfg80211_unhold_bss(wdev->current_bss);
579 cfg80211_put_bss(&wdev->current_bss->pub);
580 wdev->current_bss = NULL;
581
582 cfg80211_hold_bss(bss_from_pub(bss));
583 wdev->current_bss = bss_from_pub(bss);
584
585 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid,
586 req_ie, req_ie_len, resp_ie, resp_ie_len,
587 GFP_KERNEL);
588
589 #ifdef CONFIG_CFG80211_WEXT
590 if (req_ie) {
591 memset(&wrqu, 0, sizeof(wrqu));
592 wrqu.data.length = req_ie_len;
593 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
594 &wrqu, req_ie);
595 }
596
597 if (resp_ie) {
598 memset(&wrqu, 0, sizeof(wrqu));
599 wrqu.data.length = resp_ie_len;
600 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
601 &wrqu, resp_ie);
602 }
603
604 memset(&wrqu, 0, sizeof(wrqu));
605 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
606 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
607 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN);
608 wdev->wext.prev_bssid_valid = true;
609 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
610 #endif
611
612 return;
613 out:
614 cfg80211_put_bss(bss);
615 }
616
617 void cfg80211_roamed(struct net_device *dev,
618 struct ieee80211_channel *channel,
619 const u8 *bssid,
620 const u8 *req_ie, size_t req_ie_len,
621 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
622 {
623 struct wireless_dev *wdev = dev->ieee80211_ptr;
624 struct cfg80211_bss *bss;
625
626 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
627
628 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid,
629 wdev->ssid_len, WLAN_CAPABILITY_ESS,
630 WLAN_CAPABILITY_ESS);
631 if (WARN_ON(!bss))
632 return;
633
634 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie,
635 resp_ie_len, gfp);
636 }
637 EXPORT_SYMBOL(cfg80211_roamed);
638
639 void cfg80211_roamed_bss(struct net_device *dev,
640 struct cfg80211_bss *bss, const u8 *req_ie,
641 size_t req_ie_len, const u8 *resp_ie,
642 size_t resp_ie_len, gfp_t gfp)
643 {
644 struct wireless_dev *wdev = dev->ieee80211_ptr;
645 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
646 struct cfg80211_event *ev;
647 unsigned long flags;
648
649 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
650
651 if (WARN_ON(!bss))
652 return;
653
654 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
655 if (!ev) {
656 cfg80211_put_bss(bss);
657 return;
658 }
659
660 ev->type = EVENT_ROAMED;
661 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
662 ev->rm.req_ie_len = req_ie_len;
663 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
664 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
665 ev->rm.resp_ie_len = resp_ie_len;
666 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
667 ev->rm.bss = bss;
668
669 spin_lock_irqsave(&wdev->event_lock, flags);
670 list_add_tail(&ev->list, &wdev->event_list);
671 spin_unlock_irqrestore(&wdev->event_lock, flags);
672 queue_work(cfg80211_wq, &rdev->event_work);
673 }
674 EXPORT_SYMBOL(cfg80211_roamed_bss);
675
676 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
677 size_t ie_len, u16 reason, bool from_ap)
678 {
679 struct wireless_dev *wdev = dev->ieee80211_ptr;
680 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
681 int i;
682 #ifdef CONFIG_CFG80211_WEXT
683 union iwreq_data wrqu;
684 #endif
685
686 ASSERT_WDEV_LOCK(wdev);
687
688 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
689 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
690 return;
691
692 if (wdev->sme_state != CFG80211_SME_CONNECTED)
693 return;
694
695 if (wdev->current_bss) {
696 cfg80211_unhold_bss(wdev->current_bss);
697 cfg80211_put_bss(&wdev->current_bss->pub);
698 }
699
700 wdev->current_bss = NULL;
701 wdev->sme_state = CFG80211_SME_IDLE;
702 wdev->ssid_len = 0;
703
704 if (wdev->conn) {
705 kfree(wdev->conn->ie);
706 wdev->conn->ie = NULL;
707 kfree(wdev->conn);
708 wdev->conn = NULL;
709 }
710
711 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
712
713 /*
714 * Delete all the keys ... pairwise keys can't really
715 * exist any more anyway, but default keys might.
716 */
717 if (rdev->ops->del_key)
718 for (i = 0; i < 6; i++)
719 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
720
721 #ifdef CONFIG_CFG80211_WEXT
722 memset(&wrqu, 0, sizeof(wrqu));
723 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
724 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
725 wdev->wext.connect.ssid_len = 0;
726 #endif
727
728 schedule_work(&cfg80211_disconnect_work);
729 }
730
731 void cfg80211_disconnected(struct net_device *dev, u16 reason,
732 u8 *ie, size_t ie_len, gfp_t gfp)
733 {
734 struct wireless_dev *wdev = dev->ieee80211_ptr;
735 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
736 struct cfg80211_event *ev;
737 unsigned long flags;
738
739 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
740
741 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
742 if (!ev)
743 return;
744
745 ev->type = EVENT_DISCONNECTED;
746 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
747 ev->dc.ie_len = ie_len;
748 memcpy((void *)ev->dc.ie, ie, ie_len);
749 ev->dc.reason = reason;
750
751 spin_lock_irqsave(&wdev->event_lock, flags);
752 list_add_tail(&ev->list, &wdev->event_list);
753 spin_unlock_irqrestore(&wdev->event_lock, flags);
754 queue_work(cfg80211_wq, &rdev->event_work);
755 }
756 EXPORT_SYMBOL(cfg80211_disconnected);
757
758 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
759 struct net_device *dev,
760 struct cfg80211_connect_params *connect,
761 struct cfg80211_cached_keys *connkeys,
762 const u8 *prev_bssid)
763 {
764 struct wireless_dev *wdev = dev->ieee80211_ptr;
765 struct cfg80211_bss *bss = NULL;
766 int err;
767
768 ASSERT_WDEV_LOCK(wdev);
769
770 if (wdev->sme_state != CFG80211_SME_IDLE)
771 return -EALREADY;
772
773 if (WARN_ON(wdev->connect_keys)) {
774 kfree(wdev->connect_keys);
775 wdev->connect_keys = NULL;
776 }
777
778 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
779 rdev->wiphy.ht_capa_mod_mask);
780
781 if (connkeys && connkeys->def >= 0) {
782 int idx;
783 u32 cipher;
784
785 idx = connkeys->def;
786 cipher = connkeys->params[idx].cipher;
787 /* If given a WEP key we may need it for shared key auth */
788 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
789 cipher == WLAN_CIPHER_SUITE_WEP104) {
790 connect->key_idx = idx;
791 connect->key = connkeys->params[idx].key;
792 connect->key_len = connkeys->params[idx].key_len;
793
794 /*
795 * If ciphers are not set (e.g. when going through
796 * iwconfig), we have to set them appropriately here.
797 */
798 if (connect->crypto.cipher_group == 0)
799 connect->crypto.cipher_group = cipher;
800
801 if (connect->crypto.n_ciphers_pairwise == 0) {
802 connect->crypto.n_ciphers_pairwise = 1;
803 connect->crypto.ciphers_pairwise[0] = cipher;
804 }
805 }
806 }
807
808 if (!rdev->ops->connect) {
809 if (!rdev->ops->auth || !rdev->ops->assoc)
810 return -EOPNOTSUPP;
811
812 if (WARN_ON(wdev->conn))
813 return -EINPROGRESS;
814
815 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
816 if (!wdev->conn)
817 return -ENOMEM;
818
819 /*
820 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
821 */
822 memcpy(&wdev->conn->params, connect, sizeof(*connect));
823 if (connect->bssid) {
824 wdev->conn->params.bssid = wdev->conn->bssid;
825 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
826 }
827
828 if (connect->ie) {
829 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
830 GFP_KERNEL);
831 wdev->conn->params.ie = wdev->conn->ie;
832 if (!wdev->conn->ie) {
833 kfree(wdev->conn);
834 wdev->conn = NULL;
835 return -ENOMEM;
836 }
837 }
838
839 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
840 wdev->conn->auto_auth = true;
841 /* start with open system ... should mostly work */
842 wdev->conn->params.auth_type =
843 NL80211_AUTHTYPE_OPEN_SYSTEM;
844 } else {
845 wdev->conn->auto_auth = false;
846 }
847
848 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
849 wdev->ssid_len = connect->ssid_len;
850 wdev->conn->params.ssid = wdev->ssid;
851 wdev->conn->params.ssid_len = connect->ssid_len;
852
853 /* see if we have the bss already */
854 bss = cfg80211_get_conn_bss(wdev);
855
856 wdev->sme_state = CFG80211_SME_CONNECTING;
857 wdev->connect_keys = connkeys;
858
859 if (prev_bssid) {
860 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
861 wdev->conn->prev_bssid_valid = true;
862 }
863
864 /* we're good if we have a matching bss struct */
865 if (bss) {
866 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
867 err = cfg80211_conn_do_work(wdev);
868 cfg80211_put_bss(bss);
869 } else {
870 /* otherwise we'll need to scan for the AP first */
871 err = cfg80211_conn_scan(wdev);
872 /*
873 * If we can't scan right now, then we need to scan again
874 * after the current scan finished, since the parameters
875 * changed (unless we find a good AP anyway).
876 */
877 if (err == -EBUSY) {
878 err = 0;
879 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
880 }
881 }
882 if (err) {
883 kfree(wdev->conn->ie);
884 kfree(wdev->conn);
885 wdev->conn = NULL;
886 wdev->sme_state = CFG80211_SME_IDLE;
887 wdev->connect_keys = NULL;
888 wdev->ssid_len = 0;
889 }
890
891 return err;
892 } else {
893 wdev->sme_state = CFG80211_SME_CONNECTING;
894 wdev->connect_keys = connkeys;
895 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
896 if (err) {
897 wdev->connect_keys = NULL;
898 wdev->sme_state = CFG80211_SME_IDLE;
899 return err;
900 }
901
902 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
903 wdev->ssid_len = connect->ssid_len;
904
905 return 0;
906 }
907 }
908
909 int cfg80211_connect(struct cfg80211_registered_device *rdev,
910 struct net_device *dev,
911 struct cfg80211_connect_params *connect,
912 struct cfg80211_cached_keys *connkeys)
913 {
914 int err;
915
916 mutex_lock(&rdev->devlist_mtx);
917 wdev_lock(dev->ieee80211_ptr);
918 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
919 wdev_unlock(dev->ieee80211_ptr);
920 mutex_unlock(&rdev->devlist_mtx);
921
922 return err;
923 }
924
925 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
926 struct net_device *dev, u16 reason, bool wextev)
927 {
928 struct wireless_dev *wdev = dev->ieee80211_ptr;
929 int err;
930
931 ASSERT_WDEV_LOCK(wdev);
932
933 if (wdev->sme_state == CFG80211_SME_IDLE)
934 return -EINVAL;
935
936 kfree(wdev->connect_keys);
937 wdev->connect_keys = NULL;
938
939 if (!rdev->ops->disconnect) {
940 if (!rdev->ops->deauth)
941 return -EOPNOTSUPP;
942
943 /* was it connected by userspace SME? */
944 if (!wdev->conn) {
945 cfg80211_mlme_down(rdev, dev);
946 return 0;
947 }
948
949 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
950 (wdev->conn->state == CFG80211_CONN_SCANNING ||
951 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
952 wdev->sme_state = CFG80211_SME_IDLE;
953 kfree(wdev->conn->ie);
954 kfree(wdev->conn);
955 wdev->conn = NULL;
956 wdev->ssid_len = 0;
957 return 0;
958 }
959
960 /* wdev->conn->params.bssid must be set if > SCANNING */
961 err = __cfg80211_mlme_deauth(rdev, dev,
962 wdev->conn->params.bssid,
963 NULL, 0, reason, false);
964 if (err)
965 return err;
966 } else {
967 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
968 if (err)
969 return err;
970 }
971
972 if (wdev->sme_state == CFG80211_SME_CONNECTED)
973 __cfg80211_disconnected(dev, NULL, 0, 0, false);
974 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
975 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
976 WLAN_STATUS_UNSPECIFIED_FAILURE,
977 wextev, NULL);
978
979 return 0;
980 }
981
982 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
983 struct net_device *dev,
984 u16 reason, bool wextev)
985 {
986 int err;
987
988 wdev_lock(dev->ieee80211_ptr);
989 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
990 wdev_unlock(dev->ieee80211_ptr);
991
992 return err;
993 }
994
995 void cfg80211_sme_disassoc(struct net_device *dev,
996 struct cfg80211_internal_bss *bss)
997 {
998 struct wireless_dev *wdev = dev->ieee80211_ptr;
999 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
1000 u8 bssid[ETH_ALEN];
1001
1002 ASSERT_WDEV_LOCK(wdev);
1003
1004 if (!wdev->conn)
1005 return;
1006
1007 if (wdev->conn->state == CFG80211_CONN_IDLE)
1008 return;
1009
1010 /*
1011 * Ok, so the association was made by this SME -- we don't
1012 * want it any more so deauthenticate too.
1013 */
1014
1015 memcpy(bssid, bss->pub.bssid, ETH_ALEN);
1016
1017 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
1018 WLAN_REASON_DEAUTH_LEAVING, false);
1019 }
Linus' kernel tree