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staging: brcm80211: cleanup of transmit buffer size related wrapper function
[zen-stable.git] / net / wireless / sme.c
blobb7b6ff8be553a10f7a0191ac04f09eeaff06463c
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 }
122 }
123 request->n_channels = n_channels;
124 request->ssids = (void *)&request->channels[n_channels];
125 request->n_ssids = 1;
126
127 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
128 wdev->conn->params.ssid_len);
129 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
130
131 request->dev = wdev->netdev;
132 request->wiphy = &rdev->wiphy;
133
134 rdev->scan_req = request;
135
136 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
137 if (!err) {
138 wdev->conn->state = CFG80211_CONN_SCANNING;
139 nl80211_send_scan_start(rdev, wdev->netdev);
140 dev_hold(wdev->netdev);
141 } else {
142 rdev->scan_req = NULL;
143 kfree(request);
144 }
145 return err;
146 }
147
148 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
149 {
150 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
151 struct cfg80211_connect_params *params;
152 const u8 *prev_bssid = NULL;
153 int err;
154
155 ASSERT_WDEV_LOCK(wdev);
156
157 if (!wdev->conn)
158 return 0;
159
160 params = &wdev->conn->params;
161
162 switch (wdev->conn->state) {
163 case CFG80211_CONN_SCAN_AGAIN:
164 return cfg80211_conn_scan(wdev);
165 case CFG80211_CONN_AUTHENTICATE_NEXT:
166 BUG_ON(!rdev->ops->auth);
167 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
168 return __cfg80211_mlme_auth(rdev, wdev->netdev,
169 params->channel, params->auth_type,
170 params->bssid,
171 params->ssid, params->ssid_len,
172 NULL, 0,
173 params->key, params->key_len,
174 params->key_idx, false);
175 case CFG80211_CONN_ASSOCIATE_NEXT:
176 BUG_ON(!rdev->ops->assoc);
177 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
178 if (wdev->conn->prev_bssid_valid)
179 prev_bssid = wdev->conn->prev_bssid;
180 err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
181 params->channel, params->bssid,
182 prev_bssid,
183 params->ssid, params->ssid_len,
184 params->ie, params->ie_len,
185 false, &params->crypto);
186 if (err)
187 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
188 NULL, 0,
189 WLAN_REASON_DEAUTH_LEAVING,
190 false);
191 return err;
192 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
193 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
194 NULL, 0,
195 WLAN_REASON_DEAUTH_LEAVING, false);
196 /* return an error so that we call __cfg80211_connect_result() */
197 return -EINVAL;
198 default:
199 return 0;
200 }
201 }
202
203 void cfg80211_conn_work(struct work_struct *work)
204 {
205 struct cfg80211_registered_device *rdev =
206 container_of(work, struct cfg80211_registered_device, conn_work);
207 struct wireless_dev *wdev;
208 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
209
210 rtnl_lock();
211 cfg80211_lock_rdev(rdev);
212 mutex_lock(&rdev->devlist_mtx);
213
214 list_for_each_entry(wdev, &rdev->netdev_list, list) {
215 wdev_lock(wdev);
216 if (!netif_running(wdev->netdev)) {
217 wdev_unlock(wdev);
218 continue;
219 }
220 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
221 wdev_unlock(wdev);
222 continue;
223 }
224 if (wdev->conn->params.bssid) {
225 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
226 bssid = bssid_buf;
227 }
228 if (cfg80211_conn_do_work(wdev))
229 __cfg80211_connect_result(
230 wdev->netdev, bssid,
231 NULL, 0, NULL, 0,
232 WLAN_STATUS_UNSPECIFIED_FAILURE,
233 false, NULL);
234 wdev_unlock(wdev);
235 }
236
237 mutex_unlock(&rdev->devlist_mtx);
238 cfg80211_unlock_rdev(rdev);
239 rtnl_unlock();
240 }
241
242 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
243 {
244 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
245 struct cfg80211_bss *bss;
246 u16 capa = WLAN_CAPABILITY_ESS;
247
248 ASSERT_WDEV_LOCK(wdev);
249
250 if (wdev->conn->params.privacy)
251 capa |= WLAN_CAPABILITY_PRIVACY;
252
253 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
254 wdev->conn->params.bssid,
255 wdev->conn->params.ssid,
256 wdev->conn->params.ssid_len,
257 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
258 capa);
259 if (!bss)
260 return NULL;
261
262 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
263 wdev->conn->params.bssid = wdev->conn->bssid;
264 wdev->conn->params.channel = bss->channel;
265 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
266 schedule_work(&rdev->conn_work);
267
268 return bss;
269 }
270
271 static void __cfg80211_sme_scan_done(struct net_device *dev)
272 {
273 struct wireless_dev *wdev = dev->ieee80211_ptr;
274 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
275 struct cfg80211_bss *bss;
276
277 ASSERT_WDEV_LOCK(wdev);
278
279 if (wdev->sme_state != CFG80211_SME_CONNECTING)
280 return;
281
282 if (!wdev->conn)
283 return;
284
285 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
286 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
287 return;
288
289 bss = cfg80211_get_conn_bss(wdev);
290 if (bss) {
291 cfg80211_put_bss(bss);
292 } else {
293 /* not found */
294 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
295 schedule_work(&rdev->conn_work);
296 else
297 __cfg80211_connect_result(
298 wdev->netdev,
299 wdev->conn->params.bssid,
300 NULL, 0, NULL, 0,
301 WLAN_STATUS_UNSPECIFIED_FAILURE,
302 false, NULL);
303 }
304 }
305
306 void cfg80211_sme_scan_done(struct net_device *dev)
307 {
308 struct wireless_dev *wdev = dev->ieee80211_ptr;
309
310 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
311 wdev_lock(wdev);
312 __cfg80211_sme_scan_done(dev);
313 wdev_unlock(wdev);
314 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
315 }
316
317 void cfg80211_sme_rx_auth(struct net_device *dev,
318 const u8 *buf, size_t len)
319 {
320 struct wireless_dev *wdev = dev->ieee80211_ptr;
321 struct wiphy *wiphy = wdev->wiphy;
322 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
323 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
324 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
325
326 ASSERT_WDEV_LOCK(wdev);
327
328 /* should only RX auth frames when connecting */
329 if (wdev->sme_state != CFG80211_SME_CONNECTING)
330 return;
331
332 if (WARN_ON(!wdev->conn))
333 return;
334
335 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
336 wdev->conn->auto_auth &&
337 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
338 /* select automatically between only open, shared, leap */
339 switch (wdev->conn->params.auth_type) {
340 case NL80211_AUTHTYPE_OPEN_SYSTEM:
341 if (wdev->connect_keys)
342 wdev->conn->params.auth_type =
343 NL80211_AUTHTYPE_SHARED_KEY;
344 else
345 wdev->conn->params.auth_type =
346 NL80211_AUTHTYPE_NETWORK_EAP;
347 break;
348 case NL80211_AUTHTYPE_SHARED_KEY:
349 wdev->conn->params.auth_type =
350 NL80211_AUTHTYPE_NETWORK_EAP;
351 break;
352 default:
353 /* huh? */
354 wdev->conn->params.auth_type =
355 NL80211_AUTHTYPE_OPEN_SYSTEM;
356 break;
357 }
358 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
359 schedule_work(&rdev->conn_work);
360 } else if (status_code != WLAN_STATUS_SUCCESS) {
361 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
362 status_code, false, NULL);
363 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
364 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
365 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
366 schedule_work(&rdev->conn_work);
367 }
368 }
369
370 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
371 {
372 struct wiphy *wiphy = wdev->wiphy;
373 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
374
375 if (WARN_ON(!wdev->conn))
376 return false;
377
378 if (!wdev->conn->prev_bssid_valid)
379 return false;
380
381 /*
382 * Some stupid APs don't accept reassoc, so we
383 * need to fall back to trying regular assoc.
384 */
385 wdev->conn->prev_bssid_valid = false;
386 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
387 schedule_work(&rdev->conn_work);
388
389 return true;
390 }
391
392 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
393 {
394 struct wiphy *wiphy = wdev->wiphy;
395 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
396
397 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
398 schedule_work(&rdev->conn_work);
399 }
400
401 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
402 const u8 *req_ie, size_t req_ie_len,
403 const u8 *resp_ie, size_t resp_ie_len,
404 u16 status, bool wextev,
405 struct cfg80211_bss *bss)
406 {
407 struct wireless_dev *wdev = dev->ieee80211_ptr;
408 u8 *country_ie;
409 #ifdef CONFIG_CFG80211_WEXT
410 union iwreq_data wrqu;
411 #endif
412
413 ASSERT_WDEV_LOCK(wdev);
414
415 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
416 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
417 return;
418
419 if (wdev->sme_state != CFG80211_SME_CONNECTING)
420 return;
421
422 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
423 bssid, req_ie, req_ie_len,
424 resp_ie, resp_ie_len,
425 status, GFP_KERNEL);
426
427 #ifdef CONFIG_CFG80211_WEXT
428 if (wextev) {
429 if (req_ie && status == WLAN_STATUS_SUCCESS) {
430 memset(&wrqu, 0, sizeof(wrqu));
431 wrqu.data.length = req_ie_len;
432 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
433 }
434
435 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
436 memset(&wrqu, 0, sizeof(wrqu));
437 wrqu.data.length = resp_ie_len;
438 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
439 }
440
441 memset(&wrqu, 0, sizeof(wrqu));
442 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
443 if (bssid && status == WLAN_STATUS_SUCCESS) {
444 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
445 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
446 wdev->wext.prev_bssid_valid = true;
447 }
448 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
449 }
450 #endif
451
452 if (wdev->current_bss) {
453 cfg80211_unhold_bss(wdev->current_bss);
454 cfg80211_put_bss(&wdev->current_bss->pub);
455 wdev->current_bss = NULL;
456 }
457
458 if (wdev->conn)
459 wdev->conn->state = CFG80211_CONN_IDLE;
460
461 if (status != WLAN_STATUS_SUCCESS) {
462 wdev->sme_state = CFG80211_SME_IDLE;
463 if (wdev->conn)
464 kfree(wdev->conn->ie);
465 kfree(wdev->conn);
466 wdev->conn = NULL;
467 kfree(wdev->connect_keys);
468 wdev->connect_keys = NULL;
469 wdev->ssid_len = 0;
470 return;
471 }
472
473 if (!bss)
474 bss = cfg80211_get_bss(wdev->wiphy,
475 wdev->conn ? wdev->conn->params.channel :
476 NULL,
477 bssid,
478 wdev->ssid, wdev->ssid_len,
479 WLAN_CAPABILITY_ESS,
480 WLAN_CAPABILITY_ESS);
481
482 if (WARN_ON(!bss))
483 return;
484
485 cfg80211_hold_bss(bss_from_pub(bss));
486 wdev->current_bss = bss_from_pub(bss);
487
488 wdev->sme_state = CFG80211_SME_CONNECTED;
489 cfg80211_upload_connect_keys(wdev);
490
491 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
492
493 if (!country_ie)
494 return;
495
496 /*
497 * ieee80211_bss_get_ie() ensures we can access:
498 * - country_ie + 2, the start of the country ie data, and
499 * - and country_ie[1] which is the IE length
500 */
501 regulatory_hint_11d(wdev->wiphy,
502 bss->channel->band,
503 country_ie + 2,
504 country_ie[1]);
505 }
506
507 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
508 const u8 *req_ie, size_t req_ie_len,
509 const u8 *resp_ie, size_t resp_ie_len,
510 u16 status, gfp_t gfp)
511 {
512 struct wireless_dev *wdev = dev->ieee80211_ptr;
513 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
514 struct cfg80211_event *ev;
515 unsigned long flags;
516
517 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
518
519 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
520 if (!ev)
521 return;
522
523 ev->type = EVENT_CONNECT_RESULT;
524 if (bssid)
525 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
526 if (req_ie_len) {
527 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
528 ev->cr.req_ie_len = req_ie_len;
529 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
530 }
531 if (resp_ie_len) {
532 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
533 ev->cr.resp_ie_len = resp_ie_len;
534 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
535 }
536 ev->cr.status = status;
537
538 spin_lock_irqsave(&wdev->event_lock, flags);
539 list_add_tail(&ev->list, &wdev->event_list);
540 spin_unlock_irqrestore(&wdev->event_lock, flags);
541 queue_work(cfg80211_wq, &rdev->event_work);
542 }
543 EXPORT_SYMBOL(cfg80211_connect_result);
544
545 void __cfg80211_roamed(struct wireless_dev *wdev,
546 struct ieee80211_channel *channel,
547 const u8 *bssid,
548 const u8 *req_ie, size_t req_ie_len,
549 const u8 *resp_ie, size_t resp_ie_len)
550 {
551 struct cfg80211_bss *bss;
552 #ifdef CONFIG_CFG80211_WEXT
553 union iwreq_data wrqu;
554 #endif
555
556 ASSERT_WDEV_LOCK(wdev);
557
558 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
559 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
560 return;
561
562 if (wdev->sme_state != CFG80211_SME_CONNECTED)
563 return;
564
565 /* internal error -- how did we get to CONNECTED w/o BSS? */
566 if (WARN_ON(!wdev->current_bss)) {
567 return;
568 }
569
570 cfg80211_unhold_bss(wdev->current_bss);
571 cfg80211_put_bss(&wdev->current_bss->pub);
572 wdev->current_bss = NULL;
573
574 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid,
575 wdev->ssid, wdev->ssid_len,
576 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
577
578 if (WARN_ON(!bss))
579 return;
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, 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, bssid, ETH_ALEN);
606 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
607 wdev->wext.prev_bssid_valid = true;
608 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
609 #endif
610 }
611
612 void cfg80211_roamed(struct net_device *dev,
613 struct ieee80211_channel *channel,
614 const u8 *bssid,
615 const u8 *req_ie, size_t req_ie_len,
616 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
617 {
618 struct wireless_dev *wdev = dev->ieee80211_ptr;
619 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
620 struct cfg80211_event *ev;
621 unsigned long flags;
622
623 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
624
625 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
626 if (!ev)
627 return;
628
629 ev->type = EVENT_ROAMED;
630 ev->rm.channel = channel;
631 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
632 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
633 ev->rm.req_ie_len = req_ie_len;
634 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
635 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
636 ev->rm.resp_ie_len = resp_ie_len;
637 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
638
639 spin_lock_irqsave(&wdev->event_lock, flags);
640 list_add_tail(&ev->list, &wdev->event_list);
641 spin_unlock_irqrestore(&wdev->event_lock, flags);
642 queue_work(cfg80211_wq, &rdev->event_work);
643 }
644 EXPORT_SYMBOL(cfg80211_roamed);
645
646 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
647 size_t ie_len, u16 reason, bool from_ap)
648 {
649 struct wireless_dev *wdev = dev->ieee80211_ptr;
650 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
651 int i;
652 #ifdef CONFIG_CFG80211_WEXT
653 union iwreq_data wrqu;
654 #endif
655
656 ASSERT_WDEV_LOCK(wdev);
657
658 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
659 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
660 return;
661
662 if (wdev->sme_state != CFG80211_SME_CONNECTED)
663 return;
664
665 if (wdev->current_bss) {
666 cfg80211_unhold_bss(wdev->current_bss);
667 cfg80211_put_bss(&wdev->current_bss->pub);
668 }
669
670 wdev->current_bss = NULL;
671 wdev->sme_state = CFG80211_SME_IDLE;
672 wdev->ssid_len = 0;
673
674 if (wdev->conn) {
675 const u8 *bssid;
676 int ret;
677
678 kfree(wdev->conn->ie);
679 wdev->conn->ie = NULL;
680 kfree(wdev->conn);
681 wdev->conn = NULL;
682
683 /*
684 * If this disconnect was due to a disassoc, we
685 * we might still have an auth BSS around. For
686 * the userspace SME that's currently expected,
687 * but for the kernel SME (nl80211 CONNECT or
688 * wireless extensions) we want to clear up all
689 * state.
690 */
691 for (i = 0; i < MAX_AUTH_BSSES; i++) {
692 if (!wdev->auth_bsses[i])
693 continue;
694 bssid = wdev->auth_bsses[i]->pub.bssid;
695 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
696 WLAN_REASON_DEAUTH_LEAVING,
697 false);
698 WARN(ret, "deauth failed: %d\n", ret);
699 }
700 }
701
702 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
703
704 /*
705 * Delete all the keys ... pairwise keys can't really
706 * exist any more anyway, but default keys might.
707 */
708 if (rdev->ops->del_key)
709 for (i = 0; i < 6; i++)
710 rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL);
711
712 #ifdef CONFIG_CFG80211_WEXT
713 memset(&wrqu, 0, sizeof(wrqu));
714 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
715 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
716 wdev->wext.connect.ssid_len = 0;
717 #endif
718
719 schedule_work(&cfg80211_disconnect_work);
720 }
721
722 void cfg80211_disconnected(struct net_device *dev, u16 reason,
723 u8 *ie, size_t ie_len, gfp_t gfp)
724 {
725 struct wireless_dev *wdev = dev->ieee80211_ptr;
726 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
727 struct cfg80211_event *ev;
728 unsigned long flags;
729
730 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
731
732 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
733 if (!ev)
734 return;
735
736 ev->type = EVENT_DISCONNECTED;
737 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
738 ev->dc.ie_len = ie_len;
739 memcpy((void *)ev->dc.ie, ie, ie_len);
740 ev->dc.reason = reason;
741
742 spin_lock_irqsave(&wdev->event_lock, flags);
743 list_add_tail(&ev->list, &wdev->event_list);
744 spin_unlock_irqrestore(&wdev->event_lock, flags);
745 queue_work(cfg80211_wq, &rdev->event_work);
746 }
747 EXPORT_SYMBOL(cfg80211_disconnected);
748
749 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
750 struct net_device *dev,
751 struct cfg80211_connect_params *connect,
752 struct cfg80211_cached_keys *connkeys,
753 const u8 *prev_bssid)
754 {
755 struct wireless_dev *wdev = dev->ieee80211_ptr;
756 struct cfg80211_bss *bss = NULL;
757 int err;
758
759 ASSERT_WDEV_LOCK(wdev);
760
761 if (wdev->sme_state != CFG80211_SME_IDLE)
762 return -EALREADY;
763
764 if (WARN_ON(wdev->connect_keys)) {
765 kfree(wdev->connect_keys);
766 wdev->connect_keys = NULL;
767 }
768
769 if (connkeys && connkeys->def >= 0) {
770 int idx;
771 u32 cipher;
772
773 idx = connkeys->def;
774 cipher = connkeys->params[idx].cipher;
775 /* If given a WEP key we may need it for shared key auth */
776 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
777 cipher == WLAN_CIPHER_SUITE_WEP104) {
778 connect->key_idx = idx;
779 connect->key = connkeys->params[idx].key;
780 connect->key_len = connkeys->params[idx].key_len;
781
782 /*
783 * If ciphers are not set (e.g. when going through
784 * iwconfig), we have to set them appropriately here.
785 */
786 if (connect->crypto.cipher_group == 0)
787 connect->crypto.cipher_group = cipher;
788
789 if (connect->crypto.n_ciphers_pairwise == 0) {
790 connect->crypto.n_ciphers_pairwise = 1;
791 connect->crypto.ciphers_pairwise[0] = cipher;
792 }
793 }
794 }
795
796 if (!rdev->ops->connect) {
797 if (!rdev->ops->auth || !rdev->ops->assoc)
798 return -EOPNOTSUPP;
799
800 if (WARN_ON(wdev->conn))
801 return -EINPROGRESS;
802
803 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
804 if (!wdev->conn)
805 return -ENOMEM;
806
807 /*
808 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
809 */
810 memcpy(&wdev->conn->params, connect, sizeof(*connect));
811 if (connect->bssid) {
812 wdev->conn->params.bssid = wdev->conn->bssid;
813 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
814 }
815
816 if (connect->ie) {
817 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
818 GFP_KERNEL);
819 wdev->conn->params.ie = wdev->conn->ie;
820 if (!wdev->conn->ie) {
821 kfree(wdev->conn);
822 wdev->conn = NULL;
823 return -ENOMEM;
824 }
825 }
826
827 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
828 wdev->conn->auto_auth = true;
829 /* start with open system ... should mostly work */
830 wdev->conn->params.auth_type =
831 NL80211_AUTHTYPE_OPEN_SYSTEM;
832 } else {
833 wdev->conn->auto_auth = false;
834 }
835
836 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
837 wdev->ssid_len = connect->ssid_len;
838 wdev->conn->params.ssid = wdev->ssid;
839 wdev->conn->params.ssid_len = connect->ssid_len;
840
841 /* see if we have the bss already */
842 bss = cfg80211_get_conn_bss(wdev);
843
844 wdev->sme_state = CFG80211_SME_CONNECTING;
845 wdev->connect_keys = connkeys;
846
847 if (prev_bssid) {
848 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
849 wdev->conn->prev_bssid_valid = true;
850 }
851
852 /* we're good if we have a matching bss struct */
853 if (bss) {
854 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
855 err = cfg80211_conn_do_work(wdev);
856 cfg80211_put_bss(bss);
857 } else {
858 /* otherwise we'll need to scan for the AP first */
859 err = cfg80211_conn_scan(wdev);
860 /*
861 * If we can't scan right now, then we need to scan again
862 * after the current scan finished, since the parameters
863 * changed (unless we find a good AP anyway).
864 */
865 if (err == -EBUSY) {
866 err = 0;
867 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
868 }
869 }
870 if (err) {
871 kfree(wdev->conn->ie);
872 kfree(wdev->conn);
873 wdev->conn = NULL;
874 wdev->sme_state = CFG80211_SME_IDLE;
875 wdev->connect_keys = NULL;
876 wdev->ssid_len = 0;
877 }
878
879 return err;
880 } else {
881 wdev->sme_state = CFG80211_SME_CONNECTING;
882 wdev->connect_keys = connkeys;
883 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
884 if (err) {
885 wdev->connect_keys = NULL;
886 wdev->sme_state = CFG80211_SME_IDLE;
887 return err;
888 }
889
890 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
891 wdev->ssid_len = connect->ssid_len;
892
893 return 0;
894 }
895 }
896
897 int cfg80211_connect(struct cfg80211_registered_device *rdev,
898 struct net_device *dev,
899 struct cfg80211_connect_params *connect,
900 struct cfg80211_cached_keys *connkeys)
901 {
902 int err;
903
904 mutex_lock(&rdev->devlist_mtx);
905 wdev_lock(dev->ieee80211_ptr);
906 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
907 wdev_unlock(dev->ieee80211_ptr);
908 mutex_unlock(&rdev->devlist_mtx);
909
910 return err;
911 }
912
913 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
914 struct net_device *dev, u16 reason, bool wextev)
915 {
916 struct wireless_dev *wdev = dev->ieee80211_ptr;
917 int err;
918
919 ASSERT_WDEV_LOCK(wdev);
920
921 if (wdev->sme_state == CFG80211_SME_IDLE)
922 return -EINVAL;
923
924 kfree(wdev->connect_keys);
925 wdev->connect_keys = NULL;
926
927 if (!rdev->ops->disconnect) {
928 if (!rdev->ops->deauth)
929 return -EOPNOTSUPP;
930
931 /* was it connected by userspace SME? */
932 if (!wdev->conn) {
933 cfg80211_mlme_down(rdev, dev);
934 return 0;
935 }
936
937 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
938 (wdev->conn->state == CFG80211_CONN_SCANNING ||
939 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
940 wdev->sme_state = CFG80211_SME_IDLE;
941 kfree(wdev->conn->ie);
942 kfree(wdev->conn);
943 wdev->conn = NULL;
944 wdev->ssid_len = 0;
945 return 0;
946 }
947
948 /* wdev->conn->params.bssid must be set if > SCANNING */
949 err = __cfg80211_mlme_deauth(rdev, dev,
950 wdev->conn->params.bssid,
951 NULL, 0, reason, false);
952 if (err)
953 return err;
954 } else {
955 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
956 if (err)
957 return err;
958 }
959
960 if (wdev->sme_state == CFG80211_SME_CONNECTED)
961 __cfg80211_disconnected(dev, NULL, 0, 0, false);
962 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
963 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
964 WLAN_STATUS_UNSPECIFIED_FAILURE,
965 wextev, NULL);
966
967 return 0;
968 }
969
970 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
971 struct net_device *dev,
972 u16 reason, bool wextev)
973 {
974 int err;
975
976 wdev_lock(dev->ieee80211_ptr);
977 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
978 wdev_unlock(dev->ieee80211_ptr);
979
980 return err;
981 }
982
983 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
984 {
985 struct wireless_dev *wdev = dev->ieee80211_ptr;
986 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
987 u8 bssid[ETH_ALEN];
988
989 ASSERT_WDEV_LOCK(wdev);
990
991 if (!wdev->conn)
992 return;
993
994 if (wdev->conn->state == CFG80211_CONN_IDLE)
995 return;
996
997 /*
998 * Ok, so the association was made by this SME -- we don't
999 * want it any more so deauthenticate too.
1000 */
1001
1002 if (!wdev->auth_bsses[idx])
1003 return;
1004
1005 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
1006 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
1007 NULL, 0, WLAN_REASON_DEAUTH_LEAVING,
1008 false)) {
1009 /* whatever -- assume gone anyway */
1010 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
1011 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
1012 wdev->auth_bsses[idx] = NULL;
1013 }
1014 }