2 * SME code for cfg80211's connect emulation.
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright (C) 2009 Intel Corporation. All rights reserved.
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>
19 struct cfg80211_conn {
20 struct cfg80211_connect_params params;
21 /* these are sub-states of the _CONNECTING sme_state */
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,
32 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
35 bool auto_auth, prev_bssid_valid;
38 bool cfg80211_is_all_idle(void)
40 struct cfg80211_registered_device *rdev;
41 struct wireless_dev *wdev;
42 bool is_all_idle = true;
44 mutex_lock(&cfg80211_mutex);
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.
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) {
55 if (wdev->sme_state != CFG80211_SME_IDLE)
59 cfg80211_unlock_rdev(rdev);
62 mutex_unlock(&cfg80211_mutex);
67 static void disconnect_work(struct work_struct *work)
69 if (!cfg80211_is_all_idle())
72 regulatory_hint_disconnect();
75 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
77 static int cfg80211_conn_scan(struct wireless_dev *wdev)
79 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
80 struct cfg80211_scan_request *request;
84 ASSERT_RDEV_LOCK(rdev);
85 ASSERT_WDEV_LOCK(wdev);
90 if (wdev->conn->params.channel) {
93 enum ieee80211_band band;
96 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
97 if (!wdev->wiphy->bands[band])
99 n_channels += wdev->wiphy->bands[band]->n_channels;
102 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
103 sizeof(request->channels[0]) * n_channels,
108 if (wdev->conn->params.channel)
109 request->channels[0] = wdev->conn->params.channel;
112 enum ieee80211_band band;
114 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
115 if (!wdev->wiphy->bands[band])
117 for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
119 request->channels[i] =
120 &wdev->wiphy->bands[band]->channels[j];
123 request->n_channels = n_channels;
124 request->ssids = (void *)&request->channels[n_channels];
125 request->n_ssids = 1;
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;
131 request->dev = wdev->netdev;
132 request->wiphy = &rdev->wiphy;
134 rdev->scan_req = request;
136 err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
138 wdev->conn->state = CFG80211_CONN_SCANNING;
139 nl80211_send_scan_start(rdev, wdev->netdev);
140 dev_hold(wdev->netdev);
142 rdev->scan_req = NULL;
148 static int cfg80211_conn_do_work(struct wireless_dev *wdev)
150 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
151 struct cfg80211_connect_params *params;
152 const u8 *prev_bssid = NULL;
155 ASSERT_WDEV_LOCK(wdev);
160 params = &wdev->conn->params;
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,
171 params->ssid, params->ssid_len,
173 params->key, params->key_len,
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,
183 params->ssid, params->ssid_len,
184 params->ie, params->ie_len,
185 false, ¶ms->crypto);
187 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
189 WLAN_REASON_DEAUTH_LEAVING);
191 case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
192 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
194 WLAN_REASON_DEAUTH_LEAVING);
195 /* return an error so that we call __cfg80211_connect_result() */
202 void cfg80211_conn_work(struct work_struct *work)
204 struct cfg80211_registered_device *rdev =
205 container_of(work, struct cfg80211_registered_device, conn_work);
206 struct wireless_dev *wdev;
207 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
210 cfg80211_lock_rdev(rdev);
211 mutex_lock(&rdev->devlist_mtx);
213 list_for_each_entry(wdev, &rdev->netdev_list, list) {
215 if (!netif_running(wdev->netdev)) {
219 if (wdev->sme_state != CFG80211_SME_CONNECTING) {
223 if (wdev->conn->params.bssid) {
224 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
227 if (cfg80211_conn_do_work(wdev))
228 __cfg80211_connect_result(
231 WLAN_STATUS_UNSPECIFIED_FAILURE,
236 mutex_unlock(&rdev->devlist_mtx);
237 cfg80211_unlock_rdev(rdev);
241 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
243 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
244 struct cfg80211_bss *bss;
245 u16 capa = WLAN_CAPABILITY_ESS;
247 ASSERT_WDEV_LOCK(wdev);
249 if (wdev->conn->params.privacy)
250 capa |= WLAN_CAPABILITY_PRIVACY;
252 bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
253 wdev->conn->params.ssid,
254 wdev->conn->params.ssid_len,
255 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
260 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
261 wdev->conn->params.bssid = wdev->conn->bssid;
262 wdev->conn->params.channel = bss->channel;
263 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
264 schedule_work(&rdev->conn_work);
269 static void __cfg80211_sme_scan_done(struct net_device *dev)
271 struct wireless_dev *wdev = dev->ieee80211_ptr;
272 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
273 struct cfg80211_bss *bss;
275 ASSERT_WDEV_LOCK(wdev);
277 if (wdev->sme_state != CFG80211_SME_CONNECTING)
283 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
284 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
287 bss = cfg80211_get_conn_bss(wdev);
289 cfg80211_put_bss(bss);
292 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
293 schedule_work(&rdev->conn_work);
295 __cfg80211_connect_result(
297 wdev->conn->params.bssid,
299 WLAN_STATUS_UNSPECIFIED_FAILURE,
304 void cfg80211_sme_scan_done(struct net_device *dev)
306 struct wireless_dev *wdev = dev->ieee80211_ptr;
308 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
310 __cfg80211_sme_scan_done(dev);
312 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
315 void cfg80211_sme_rx_auth(struct net_device *dev,
316 const u8 *buf, size_t len)
318 struct wireless_dev *wdev = dev->ieee80211_ptr;
319 struct wiphy *wiphy = wdev->wiphy;
320 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
321 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
322 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
324 ASSERT_WDEV_LOCK(wdev);
326 /* should only RX auth frames when connecting */
327 if (wdev->sme_state != CFG80211_SME_CONNECTING)
330 if (WARN_ON(!wdev->conn))
333 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
334 wdev->conn->auto_auth &&
335 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
336 /* select automatically between only open, shared, leap */
337 switch (wdev->conn->params.auth_type) {
338 case NL80211_AUTHTYPE_OPEN_SYSTEM:
339 if (wdev->connect_keys)
340 wdev->conn->params.auth_type =
341 NL80211_AUTHTYPE_SHARED_KEY;
343 wdev->conn->params.auth_type =
344 NL80211_AUTHTYPE_NETWORK_EAP;
346 case NL80211_AUTHTYPE_SHARED_KEY:
347 wdev->conn->params.auth_type =
348 NL80211_AUTHTYPE_NETWORK_EAP;
352 wdev->conn->params.auth_type =
353 NL80211_AUTHTYPE_OPEN_SYSTEM;
356 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
357 schedule_work(&rdev->conn_work);
358 } else if (status_code != WLAN_STATUS_SUCCESS) {
359 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
360 status_code, false, NULL);
361 } else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
362 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
363 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
364 schedule_work(&rdev->conn_work);
368 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
370 struct wiphy *wiphy = wdev->wiphy;
371 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
373 if (WARN_ON(!wdev->conn))
376 if (!wdev->conn->prev_bssid_valid)
380 * Some stupid APs don't accept reassoc, so we
381 * need to fall back to trying regular assoc.
383 wdev->conn->prev_bssid_valid = false;
384 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
385 schedule_work(&rdev->conn_work);
390 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
392 struct wiphy *wiphy = wdev->wiphy;
393 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
395 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
396 schedule_work(&rdev->conn_work);
399 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
400 const u8 *req_ie, size_t req_ie_len,
401 const u8 *resp_ie, size_t resp_ie_len,
402 u16 status, bool wextev,
403 struct cfg80211_bss *bss)
405 struct wireless_dev *wdev = dev->ieee80211_ptr;
407 #ifdef CONFIG_CFG80211_WEXT
408 union iwreq_data wrqu;
411 ASSERT_WDEV_LOCK(wdev);
413 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
416 if (wdev->sme_state != CFG80211_SME_CONNECTING)
419 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
420 bssid, req_ie, req_ie_len,
421 resp_ie, resp_ie_len,
424 #ifdef CONFIG_CFG80211_WEXT
426 if (req_ie && status == WLAN_STATUS_SUCCESS) {
427 memset(&wrqu, 0, sizeof(wrqu));
428 wrqu.data.length = req_ie_len;
429 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
432 if (resp_ie && status == WLAN_STATUS_SUCCESS) {
433 memset(&wrqu, 0, sizeof(wrqu));
434 wrqu.data.length = resp_ie_len;
435 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
438 memset(&wrqu, 0, sizeof(wrqu));
439 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
440 if (bssid && status == WLAN_STATUS_SUCCESS) {
441 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
442 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
443 wdev->wext.prev_bssid_valid = true;
445 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
449 if (wdev->current_bss) {
450 cfg80211_unhold_bss(wdev->current_bss);
451 cfg80211_put_bss(&wdev->current_bss->pub);
452 wdev->current_bss = NULL;
456 wdev->conn->state = CFG80211_CONN_IDLE;
458 if (status != WLAN_STATUS_SUCCESS) {
459 wdev->sme_state = CFG80211_SME_IDLE;
461 kfree(wdev->conn->ie);
464 kfree(wdev->connect_keys);
465 wdev->connect_keys = NULL;
471 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
472 wdev->ssid, wdev->ssid_len,
474 WLAN_CAPABILITY_ESS);
479 cfg80211_hold_bss(bss_from_pub(bss));
480 wdev->current_bss = bss_from_pub(bss);
482 wdev->sme_state = CFG80211_SME_CONNECTED;
483 cfg80211_upload_connect_keys(wdev);
485 country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
491 * ieee80211_bss_get_ie() ensures we can access:
492 * - country_ie + 2, the start of the country ie data, and
493 * - and country_ie[1] which is the IE length
495 regulatory_hint_11d(wdev->wiphy,
501 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
502 const u8 *req_ie, size_t req_ie_len,
503 const u8 *resp_ie, size_t resp_ie_len,
504 u16 status, gfp_t gfp)
506 struct wireless_dev *wdev = dev->ieee80211_ptr;
507 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
508 struct cfg80211_event *ev;
511 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
513 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
517 ev->type = EVENT_CONNECT_RESULT;
519 memcpy(ev->cr.bssid, bssid, ETH_ALEN);
520 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
521 ev->cr.req_ie_len = req_ie_len;
522 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
523 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
524 ev->cr.resp_ie_len = resp_ie_len;
525 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
526 ev->cr.status = status;
528 spin_lock_irqsave(&wdev->event_lock, flags);
529 list_add_tail(&ev->list, &wdev->event_list);
530 spin_unlock_irqrestore(&wdev->event_lock, flags);
531 queue_work(cfg80211_wq, &rdev->event_work);
533 EXPORT_SYMBOL(cfg80211_connect_result);
535 void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
536 const u8 *req_ie, size_t req_ie_len,
537 const u8 *resp_ie, size_t resp_ie_len)
539 struct cfg80211_bss *bss;
540 #ifdef CONFIG_CFG80211_WEXT
541 union iwreq_data wrqu;
544 ASSERT_WDEV_LOCK(wdev);
546 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
549 if (wdev->sme_state != CFG80211_SME_CONNECTED)
552 /* internal error -- how did we get to CONNECTED w/o BSS? */
553 if (WARN_ON(!wdev->current_bss)) {
557 cfg80211_unhold_bss(wdev->current_bss);
558 cfg80211_put_bss(&wdev->current_bss->pub);
559 wdev->current_bss = NULL;
561 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
562 wdev->ssid, wdev->ssid_len,
563 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
568 cfg80211_hold_bss(bss_from_pub(bss));
569 wdev->current_bss = bss_from_pub(bss);
571 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
572 req_ie, req_ie_len, resp_ie, resp_ie_len,
575 #ifdef CONFIG_CFG80211_WEXT
577 memset(&wrqu, 0, sizeof(wrqu));
578 wrqu.data.length = req_ie_len;
579 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
584 memset(&wrqu, 0, sizeof(wrqu));
585 wrqu.data.length = resp_ie_len;
586 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
590 memset(&wrqu, 0, sizeof(wrqu));
591 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
592 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
593 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
594 wdev->wext.prev_bssid_valid = true;
595 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
599 void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
600 const u8 *req_ie, size_t req_ie_len,
601 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
603 struct wireless_dev *wdev = dev->ieee80211_ptr;
604 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
605 struct cfg80211_event *ev;
608 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
610 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
614 ev->type = EVENT_ROAMED;
615 memcpy(ev->rm.bssid, bssid, ETH_ALEN);
616 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
617 ev->rm.req_ie_len = req_ie_len;
618 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
619 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
620 ev->rm.resp_ie_len = resp_ie_len;
621 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
623 spin_lock_irqsave(&wdev->event_lock, flags);
624 list_add_tail(&ev->list, &wdev->event_list);
625 spin_unlock_irqrestore(&wdev->event_lock, flags);
626 queue_work(cfg80211_wq, &rdev->event_work);
628 EXPORT_SYMBOL(cfg80211_roamed);
630 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
631 size_t ie_len, u16 reason, bool from_ap)
633 struct wireless_dev *wdev = dev->ieee80211_ptr;
634 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
636 #ifdef CONFIG_CFG80211_WEXT
637 union iwreq_data wrqu;
640 ASSERT_WDEV_LOCK(wdev);
642 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
645 if (wdev->sme_state != CFG80211_SME_CONNECTED)
648 if (wdev->current_bss) {
649 cfg80211_unhold_bss(wdev->current_bss);
650 cfg80211_put_bss(&wdev->current_bss->pub);
653 wdev->current_bss = NULL;
654 wdev->sme_state = CFG80211_SME_IDLE;
661 kfree(wdev->conn->ie);
662 wdev->conn->ie = NULL;
667 * If this disconnect was due to a disassoc, we
668 * we might still have an auth BSS around. For
669 * the userspace SME that's currently expected,
670 * but for the kernel SME (nl80211 CONNECT or
671 * wireless extensions) we want to clear up all
674 for (i = 0; i < MAX_AUTH_BSSES; i++) {
675 if (!wdev->auth_bsses[i])
677 bssid = wdev->auth_bsses[i]->pub.bssid;
678 ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
679 WLAN_REASON_DEAUTH_LEAVING);
680 WARN(ret, "deauth failed: %d\n", ret);
684 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
687 * Delete all the keys ... pairwise keys can't really
688 * exist any more anyway, but default keys might.
690 if (rdev->ops->del_key)
691 for (i = 0; i < 6; i++)
692 rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
694 #ifdef CONFIG_CFG80211_WEXT
695 memset(&wrqu, 0, sizeof(wrqu));
696 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
697 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
698 wdev->wext.connect.ssid_len = 0;
701 schedule_work(&cfg80211_disconnect_work);
704 void cfg80211_disconnected(struct net_device *dev, u16 reason,
705 u8 *ie, size_t ie_len, gfp_t gfp)
707 struct wireless_dev *wdev = dev->ieee80211_ptr;
708 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
709 struct cfg80211_event *ev;
712 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
714 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
718 ev->type = EVENT_DISCONNECTED;
719 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
720 ev->dc.ie_len = ie_len;
721 memcpy((void *)ev->dc.ie, ie, ie_len);
722 ev->dc.reason = reason;
724 spin_lock_irqsave(&wdev->event_lock, flags);
725 list_add_tail(&ev->list, &wdev->event_list);
726 spin_unlock_irqrestore(&wdev->event_lock, flags);
727 queue_work(cfg80211_wq, &rdev->event_work);
729 EXPORT_SYMBOL(cfg80211_disconnected);
731 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
732 struct net_device *dev,
733 struct cfg80211_connect_params *connect,
734 struct cfg80211_cached_keys *connkeys,
735 const u8 *prev_bssid)
737 struct wireless_dev *wdev = dev->ieee80211_ptr;
738 struct ieee80211_channel *chan;
739 struct cfg80211_bss *bss = NULL;
742 ASSERT_WDEV_LOCK(wdev);
744 if (wdev->sme_state != CFG80211_SME_IDLE)
747 chan = rdev_fixed_channel(rdev, wdev);
748 if (chan && chan != connect->channel)
751 if (WARN_ON(wdev->connect_keys)) {
752 kfree(wdev->connect_keys);
753 wdev->connect_keys = NULL;
756 if (connkeys && connkeys->def >= 0) {
761 cipher = connkeys->params[idx].cipher;
762 /* If given a WEP key we may need it for shared key auth */
763 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
764 cipher == WLAN_CIPHER_SUITE_WEP104) {
765 connect->key_idx = idx;
766 connect->key = connkeys->params[idx].key;
767 connect->key_len = connkeys->params[idx].key_len;
770 * If ciphers are not set (e.g. when going through
771 * iwconfig), we have to set them appropriately here.
773 if (connect->crypto.cipher_group == 0)
774 connect->crypto.cipher_group = cipher;
776 if (connect->crypto.n_ciphers_pairwise == 0) {
777 connect->crypto.n_ciphers_pairwise = 1;
778 connect->crypto.ciphers_pairwise[0] = cipher;
783 if (!rdev->ops->connect) {
784 if (!rdev->ops->auth || !rdev->ops->assoc)
787 if (WARN_ON(wdev->conn))
790 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
795 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
797 memcpy(&wdev->conn->params, connect, sizeof(*connect));
798 if (connect->bssid) {
799 wdev->conn->params.bssid = wdev->conn->bssid;
800 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
804 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
806 wdev->conn->params.ie = wdev->conn->ie;
807 if (!wdev->conn->ie) {
814 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
815 wdev->conn->auto_auth = true;
816 /* start with open system ... should mostly work */
817 wdev->conn->params.auth_type =
818 NL80211_AUTHTYPE_OPEN_SYSTEM;
820 wdev->conn->auto_auth = false;
823 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
824 wdev->ssid_len = connect->ssid_len;
825 wdev->conn->params.ssid = wdev->ssid;
826 wdev->conn->params.ssid_len = connect->ssid_len;
828 /* see if we have the bss already */
829 bss = cfg80211_get_conn_bss(wdev);
831 wdev->sme_state = CFG80211_SME_CONNECTING;
832 wdev->connect_keys = connkeys;
835 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
836 wdev->conn->prev_bssid_valid = true;
839 /* we're good if we have a matching bss struct */
841 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
842 err = cfg80211_conn_do_work(wdev);
843 cfg80211_put_bss(bss);
845 /* otherwise we'll need to scan for the AP first */
846 err = cfg80211_conn_scan(wdev);
848 * If we can't scan right now, then we need to scan again
849 * after the current scan finished, since the parameters
850 * changed (unless we find a good AP anyway).
854 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
858 kfree(wdev->conn->ie);
861 wdev->sme_state = CFG80211_SME_IDLE;
862 wdev->connect_keys = NULL;
868 wdev->sme_state = CFG80211_SME_CONNECTING;
869 wdev->connect_keys = connkeys;
870 err = rdev->ops->connect(&rdev->wiphy, dev, connect);
872 wdev->connect_keys = NULL;
873 wdev->sme_state = CFG80211_SME_IDLE;
877 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
878 wdev->ssid_len = connect->ssid_len;
884 int cfg80211_connect(struct cfg80211_registered_device *rdev,
885 struct net_device *dev,
886 struct cfg80211_connect_params *connect,
887 struct cfg80211_cached_keys *connkeys)
891 mutex_lock(&rdev->devlist_mtx);
892 wdev_lock(dev->ieee80211_ptr);
893 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
894 wdev_unlock(dev->ieee80211_ptr);
895 mutex_unlock(&rdev->devlist_mtx);
900 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
901 struct net_device *dev, u16 reason, bool wextev)
903 struct wireless_dev *wdev = dev->ieee80211_ptr;
906 ASSERT_WDEV_LOCK(wdev);
908 if (wdev->sme_state == CFG80211_SME_IDLE)
911 kfree(wdev->connect_keys);
912 wdev->connect_keys = NULL;
914 if (!rdev->ops->disconnect) {
915 if (!rdev->ops->deauth)
918 /* was it connected by userspace SME? */
920 cfg80211_mlme_down(rdev, dev);
924 if (wdev->sme_state == CFG80211_SME_CONNECTING &&
925 (wdev->conn->state == CFG80211_CONN_SCANNING ||
926 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
927 wdev->sme_state = CFG80211_SME_IDLE;
928 kfree(wdev->conn->ie);
935 /* wdev->conn->params.bssid must be set if > SCANNING */
936 err = __cfg80211_mlme_deauth(rdev, dev,
937 wdev->conn->params.bssid,
942 err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
947 if (wdev->sme_state == CFG80211_SME_CONNECTED)
948 __cfg80211_disconnected(dev, NULL, 0, 0, false);
949 else if (wdev->sme_state == CFG80211_SME_CONNECTING)
950 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
951 WLAN_STATUS_UNSPECIFIED_FAILURE,
957 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
958 struct net_device *dev,
959 u16 reason, bool wextev)
963 wdev_lock(dev->ieee80211_ptr);
964 err = __cfg80211_disconnect(rdev, dev, reason, wextev);
965 wdev_unlock(dev->ieee80211_ptr);
970 void cfg80211_sme_disassoc(struct net_device *dev, int idx)
972 struct wireless_dev *wdev = dev->ieee80211_ptr;
973 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
976 ASSERT_WDEV_LOCK(wdev);
981 if (wdev->conn->state == CFG80211_CONN_IDLE)
985 * Ok, so the association was made by this SME -- we don't
986 * want it any more so deauthenticate too.
989 if (!wdev->auth_bsses[idx])
992 memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
993 if (__cfg80211_mlme_deauth(rdev, dev, bssid,
994 NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
995 /* whatever -- assume gone anyway */
996 cfg80211_unhold_bss(wdev->auth_bsses[idx]);
997 cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
998 wdev->auth_bsses[idx] = NULL;