[deliverable/linux.git] / net / ieee80211 / softmac / ieee80211softmac_auth.c

/*
 * This file contains the softmac's authentication logic.
 *
 * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
 *                          Joseph Jezak <josejx@gentoo.org>
 *                          Larry Finger <Larry.Finger@lwfinger.net>
 *                          Danny van Dyk <kugelfang@gentoo.org>
 *                          Michael Buesch <mbuesch@freenet.de>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called COPYING.
 */

#include "ieee80211softmac_priv.h"

static void ieee80211softmac_auth_queue(void *data);

/* Queues an auth request to the desired AP */
int
ieee80211softmac_auth_req(struct ieee80211softmac_device *mac, 
	struct ieee80211softmac_network *net)
{
	struct ieee80211softmac_auth_queue_item *auth;
	unsigned long flags;
	
	if (net->authenticating)
		return 0;

	/* Add the network if it's not already added */
	ieee80211softmac_add_network(mac, net);

	dprintk(KERN_NOTICE PFX "Queueing Authentication Request to "MAC_FMT"\n", MAC_ARG(net->bssid));
	/* Queue the auth request */
	auth = (struct ieee80211softmac_auth_queue_item *)
		kmalloc(sizeof(struct ieee80211softmac_auth_queue_item), GFP_KERNEL);
	if(auth == NULL)
		return -ENOMEM;

	auth->net = net;
	auth->mac = mac;
	auth->retry = IEEE80211SOFTMAC_AUTH_RETRY_LIMIT;
	auth->state = IEEE80211SOFTMAC_AUTH_OPEN_REQUEST;
	INIT_WORK(&auth->work, &ieee80211softmac_auth_queue, (void *)auth);
	
	/* Lock (for list) */
	spin_lock_irqsave(&mac->lock, flags);

	/* add to list */
	list_add_tail(&auth->list, &mac->auth_queue);
	schedule_work(&auth->work);
	spin_unlock_irqrestore(&mac->lock, flags);
	
	return 0;
}


/* Sends an auth request to the desired AP and handles timeouts */
static void
ieee80211softmac_auth_queue(void *data)
{
	struct ieee80211softmac_device *mac;
	struct ieee80211softmac_auth_queue_item *auth;
	struct ieee80211softmac_network *net;
	unsigned long flags;

	auth = (struct ieee80211softmac_auth_queue_item *)data;
	net = auth->net;
	mac = auth->mac;

	if(auth->retry > 0) {
		/* Switch to correct channel for this network */
		mac->set_channel(mac->dev, net->channel);
		
		/* Lock and set flags */
		spin_lock_irqsave(&mac->lock, flags);
		if (unlikely(!mac->running)) {
			/* Prevent reschedule on workqueue flush */
			spin_unlock_irqrestore(&mac->lock, flags);
			return;
		}
		net->authenticated = 0;
		net->authenticating = 1;
		/* add a timeout call so we eventually give up waiting for an auth reply */
		schedule_delayed_work(&auth->work, IEEE80211SOFTMAC_AUTH_TIMEOUT);
		auth->retry--;
		spin_unlock_irqrestore(&mac->lock, flags);
		if (ieee80211softmac_send_mgt_frame(mac, auth->net, IEEE80211_STYPE_AUTH, auth->state))
			dprintk(KERN_NOTICE PFX "Sending Authentication Request to "MAC_FMT" failed (this shouldn't happen, wait for the timeout).\n", MAC_ARG(net->bssid));
		else
			dprintk(KERN_NOTICE PFX "Sent Authentication Request to "MAC_FMT".\n", MAC_ARG(net->bssid));
		return;
	}

	printkl(KERN_WARNING PFX "Authentication timed out with "MAC_FMT"\n", MAC_ARG(net->bssid));
	/* Remove this item from the queue */
	spin_lock_irqsave(&mac->lock, flags);
	net->authenticating = 0;
	ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT, net);
	cancel_delayed_work(&auth->work); /* just to make sure... */
	list_del(&auth->list);
	spin_unlock_irqrestore(&mac->lock, flags);
	/* Free it */
	kfree(auth);
}

/* Handle the auth response from the AP
 * This should be registered with ieee80211 as handle_auth 
 */
int 
ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
{	

	struct list_head *list_ptr;
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	struct ieee80211softmac_auth_queue_item *aq = NULL;
	struct ieee80211softmac_network *net = NULL;
	unsigned long flags;
	u8 * data;
	
	if (unlikely(!mac->running))
		return -ENODEV;

	/* Find correct auth queue item */
	spin_lock_irqsave(&mac->lock, flags);
	list_for_each(list_ptr, &mac->auth_queue) {
		aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
		net = aq->net;
		if (!memcmp(net->bssid, auth->header.addr2, ETH_ALEN))
			break;
		else
			aq = NULL;
	}
	spin_unlock_irqrestore(&mac->lock, flags);
	
	/* Make sure that we've got an auth queue item for this request */
	if(aq == NULL)
	{
		printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but no queue item exists.\n", MAC_ARG(auth->header.addr2));
		/* Error #? */
		return -1;
	}			
	
	/* Check for out of order authentication */
	if(!net->authenticating)
	{
		printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but did not request authentication.\n",MAC_ARG(auth->header.addr2));
		return -1;
	}

	/* Parse the auth packet */
	switch(auth->algorithm) {
	case WLAN_AUTH_OPEN:
		/* Check the status code of the response */

		switch(auth->status) {
		case WLAN_STATUS_SUCCESS:
			/* Update the status to Authenticated */
			spin_lock_irqsave(&mac->lock, flags);
		        net->authenticating = 0;
			net->authenticated = 1;
			spin_unlock_irqrestore(&mac->lock, flags);
			
			/* Send event */
			printkl(KERN_NOTICE PFX "Open Authentication completed with "MAC_FMT"\n", MAC_ARG(net->bssid));
			ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
			break;
		default:
			/* Lock and reset flags */
			spin_lock_irqsave(&mac->lock, flags);
			net->authenticated = 0;
			net->authenticating = 0;
			spin_unlock_irqrestore(&mac->lock, flags);
			
			printkl(KERN_NOTICE PFX "Open Authentication with "MAC_FMT" failed, error code: %i\n", 
				MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
			/* Count the error? */
			break;
		}
		goto free_aq;
		break;
	case WLAN_AUTH_SHARED_KEY:
		/* Figure out where we are in the process */
		switch(auth->transaction) {
		case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
			/* Check to make sure we have a challenge IE */
			data = (u8 *)auth->info_element;
			if(*data++ != MFIE_TYPE_CHALLENGE){
				printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
				break;	
			}
			/* Save the challenge */
			spin_lock_irqsave(&mac->lock, flags);
			net->challenge_len = *data++; 	
			if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
				net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
			if(net->challenge != NULL)
				kfree(net->challenge);
			net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
			memcpy(net->challenge, data, net->challenge_len);
			aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE; 
			spin_unlock_irqrestore(&mac->lock, flags);

			/* Send our response */
			ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
			return 0;
		case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
			kfree(net->challenge);
			net->challenge = NULL;
			net->challenge_len = 0;
			/* Check the status code of the response */
			switch(auth->status) {
			case WLAN_STATUS_SUCCESS:
				/* Update the status to Authenticated */	
				spin_lock_irqsave(&mac->lock, flags);
				net->authenticating = 0;
				net->authenticated = 1;
				spin_unlock_irqrestore(&mac->lock, flags);
				printkl(KERN_NOTICE PFX "Shared Key Authentication completed with "MAC_FMT"\n", 
					MAC_ARG(net->bssid));
				ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
				break;
			default:
				printkl(KERN_NOTICE PFX "Shared Key Authentication with "MAC_FMT" failed, error code: %i\n", 
					MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
				/* Lock and reset flags */
				spin_lock_irqsave(&mac->lock, flags);
 				net->authenticating = 0;
 				net->authenticated = 0;
				spin_unlock_irqrestore(&mac->lock, flags);
				/* Count the error? */
				break;
			}
			goto free_aq;
			break;
		default:
			printkl(KERN_WARNING PFX "Unhandled Authentication Step: %i\n", auth->transaction);
			break;
		}
		goto free_aq;
		break;
	default:
		/* ERROR */	
		goto free_aq;
		break;
	}
	return 0;
free_aq:
	/* Cancel the timeout */
	spin_lock_irqsave(&mac->lock, flags);
	cancel_delayed_work(&aq->work);
	/* Remove this item from the queue */
	list_del(&aq->list);
	spin_unlock_irqrestore(&mac->lock, flags);

	/* Free it */
	kfree(aq);
	return 0;
}

/*
 * Handle deauthorization
 */
static void
ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
	struct ieee80211softmac_network *net)
{
	struct ieee80211softmac_auth_queue_item *aq = NULL;
	struct list_head *list_ptr;
	unsigned long flags;

	/* deauthentication implies disassociation */
	ieee80211softmac_disassoc(mac);

	/* Lock and reset status flags */
	spin_lock_irqsave(&mac->lock, flags);
	net->authenticating = 0;
	net->authenticated = 0;
	
	/* Find correct auth queue item, if it exists */
	list_for_each(list_ptr, &mac->auth_queue) {
		aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
		if (!memcmp(net->bssid, aq->net->bssid, ETH_ALEN))
			break;
		else
			aq = NULL;
	}
	
	/* Cancel pending work */
	if(aq != NULL)
		/* Not entirely safe?  What about running work? */
		cancel_delayed_work(&aq->work);

	/* Free our network ref */
	ieee80211softmac_del_network_locked(mac, net);
	if(net->challenge != NULL)
		kfree(net->challenge);
	kfree(net);
	
	/* can't transmit data right now... */
	netif_carrier_off(mac->dev);
	spin_unlock_irqrestore(&mac->lock, flags);
}

/* 
 * Sends a deauth request to the desired AP
 */
int 
ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac, 
	struct ieee80211softmac_network *net, int reason)
{
	int ret;
	
	/* Make sure the network is authenticated */
	if (!net->authenticated)
	{
		printkl(KERN_DEBUG PFX "Can't send deauthentication packet, network is not authenticated.\n");
		/* Error okay? */
		return -EPERM;
	}
	
	/* Send the de-auth packet */
	if((ret = ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_DEAUTH, reason)))
		return ret;
	
	ieee80211softmac_deauth_from_net(mac, net);
	return 0;
}
 
/*
 * This should be registered with ieee80211 as handle_deauth
 */
int 
ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *deauth)
{
	
	struct ieee80211softmac_network *net = NULL;
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	
	if (unlikely(!mac->running))
		return -ENODEV;

	if (!deauth) {
		dprintk("deauth without deauth packet. eek!\n");
		return 0;
	}

	net = ieee80211softmac_get_network_by_bssid(mac, deauth->header.addr2);
	
	if (net == NULL) {
		printkl(KERN_DEBUG PFX "Received deauthentication packet from "MAC_FMT", but that network is unknown.\n",
			MAC_ARG(deauth->header.addr2));
		return 0;
	}

	/* Make sure the network is authenticated */
	if(!net->authenticated)
	{
		printkl(KERN_DEBUG PFX "Can't perform deauthentication, network is not authenticated.\n");
		/* Error okay? */
		return -EPERM;
	}

	ieee80211softmac_deauth_from_net(mac, net);

	/* let's try to re-associate */
	schedule_work(&mac->associnfo.work);
	return 0;
}
Commit	Line	Data
4855d25b JB	1	/*
	2	* This file contains the softmac's authentication logic.
	3	*
79859051 JB	4	* Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
	5	* Joseph Jezak <josejx@gentoo.org>
	6	* Larry Finger <Larry.Finger@lwfinger.net>
	7	* Danny van Dyk <kugelfang@gentoo.org>
	8	* Michael Buesch <mbuesch@freenet.de>
4855d25b JB	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of version 2 of the GNU General Public License as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	17	* more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	22	*
	23	* The full GNU General Public License is included in this distribution in the
	24	* file called COPYING.
	25	*/
	26
370121e5 JB	27	#include "ieee80211softmac_priv.h"
	28
	29	static void ieee80211softmac_auth_queue(void *data);
	30
	31	/* Queues an auth request to the desired AP */
	32	int
	33	ieee80211softmac_auth_req(struct ieee80211softmac_device *mac,
	34	struct ieee80211softmac_network *net)
	35	{
	36	struct ieee80211softmac_auth_queue_item *auth;
	37	unsigned long flags;
	38
370121e5 JB	39	if (net->authenticating)
	40	return 0;
	41
	42	/* Add the network if it's not already added */
	43	ieee80211softmac_add_network(mac, net);
	44
	45	dprintk(KERN_NOTICE PFX "Queueing Authentication Request to "MAC_FMT"\n", MAC_ARG(net->bssid));
	46	/* Queue the auth request */
	47	auth = (struct ieee80211softmac_auth_queue_item *)
	48	kmalloc(sizeof(struct ieee80211softmac_auth_queue_item), GFP_KERNEL);
	49	if(auth == NULL)
	50	return -ENOMEM;
	51
	52	auth->net = net;
	53	auth->mac = mac;
	54	auth->retry = IEEE80211SOFTMAC_AUTH_RETRY_LIMIT;
	55	auth->state = IEEE80211SOFTMAC_AUTH_OPEN_REQUEST;
	56	INIT_WORK(&auth->work, &ieee80211softmac_auth_queue, (void *)auth);
	57
	58	/* Lock (for list) */
	59	spin_lock_irqsave(&mac->lock, flags);
	60
	61	/* add to list */
	62	list_add_tail(&auth->list, &mac->auth_queue);
5c4df6da	63	schedule_work(&auth->work);
370121e5 JB	64	spin_unlock_irqrestore(&mac->lock, flags);
	65
	66	return 0;
	67	}
	68
	69
	70	/* Sends an auth request to the desired AP and handles timeouts */
	71	static void
	72	ieee80211softmac_auth_queue(void *data)
	73	{
	74	struct ieee80211softmac_device *mac;
	75	struct ieee80211softmac_auth_queue_item *auth;
	76	struct ieee80211softmac_network *net;
	77	unsigned long flags;
	78
370121e5 JB	79	auth = (struct ieee80211softmac_auth_queue_item *)data;
	80	net = auth->net;
	81	mac = auth->mac;
	82
	83	if(auth->retry > 0) {
	84	/* Switch to correct channel for this network */
	85	mac->set_channel(mac->dev, net->channel);
	86
	87	/* Lock and set flags */
	88	spin_lock_irqsave(&mac->lock, flags);
d57336e3 DD	89	if (unlikely(!mac->running)) {
	90	/* Prevent reschedule on workqueue flush */
	91	spin_unlock_irqrestore(&mac->lock, flags);
	92	return;
	93	}
370121e5 JB	94	net->authenticated = 0;
	95	net->authenticating = 1;
	96	/* add a timeout call so we eventually give up waiting for an auth reply */
5c4df6da	97	schedule_delayed_work(&auth->work, IEEE80211SOFTMAC_AUTH_TIMEOUT);
370121e5 JB	98	auth->retry--;
	99	spin_unlock_irqrestore(&mac->lock, flags);
	100	if (ieee80211softmac_send_mgt_frame(mac, auth->net, IEEE80211_STYPE_AUTH, auth->state))
	101	dprintk(KERN_NOTICE PFX "Sending Authentication Request to "MAC_FMT" failed (this shouldn't happen, wait for the timeout).\n", MAC_ARG(net->bssid));
	102	else
	103	dprintk(KERN_NOTICE PFX "Sent Authentication Request to "MAC_FMT".\n", MAC_ARG(net->bssid));
	104	return;
	105	}
	106
	107	printkl(KERN_WARNING PFX "Authentication timed out with "MAC_FMT"\n", MAC_ARG(net->bssid));
	108	/* Remove this item from the queue */
	109	spin_lock_irqsave(&mac->lock, flags);
76ea4c7f	110	net->authenticating = 0;
370121e5 JB	111	ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT, net);
	112	cancel_delayed_work(&auth->work); /* just to make sure... */
	113	list_del(&auth->list);
	114	spin_unlock_irqrestore(&mac->lock, flags);
	115	/* Free it */
	116	kfree(auth);
	117	}
	118
	119	/* Handle the auth response from the AP
	120	* This should be registered with ieee80211 as handle_auth
	121	*/
	122	int
	123	ieee80211softmac_auth_resp(struct net_device dev, struct ieee80211_auth auth)
	124	{
	125
	126	struct list_head *list_ptr;
	127	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	128	struct ieee80211softmac_auth_queue_item *aq = NULL;
	129	struct ieee80211softmac_network *net = NULL;
	130	unsigned long flags;
	131	u8 * data;
	132
d57336e3 DD	133	if (unlikely(!mac->running))
	134	return -ENODEV;
	135
370121e5 JB	136	/* Find correct auth queue item */
	137	spin_lock_irqsave(&mac->lock, flags);
	138	list_for_each(list_ptr, &mac->auth_queue) {
	139	aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
	140	net = aq->net;
	141	if (!memcmp(net->bssid, auth->header.addr2, ETH_ALEN))
	142	break;
	143	else
	144	aq = NULL;
	145	}
	146	spin_unlock_irqrestore(&mac->lock, flags);
	147
	148	/* Make sure that we've got an auth queue item for this request */
	149	if(aq == NULL)
	150	{
	151	printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but no queue item exists.\n", MAC_ARG(auth->header.addr2));
	152	/* Error #? */
	153	return -1;
	154	}
	155
	156	/* Check for out of order authentication */
	157	if(!net->authenticating)
	158	{
	159	printkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but did not request authentication.\n",MAC_ARG(auth->header.addr2));
	160	return -1;
	161	}
	162
	163	/* Parse the auth packet */
	164	switch(auth->algorithm) {
	165	case WLAN_AUTH_OPEN:
	166	/* Check the status code of the response */
	167
	168	switch(auth->status) {
	169	case WLAN_STATUS_SUCCESS:
	170	/* Update the status to Authenticated */
	171	spin_lock_irqsave(&mac->lock, flags);
	172	net->authenticating = 0;
	173	net->authenticated = 1;
	174	spin_unlock_irqrestore(&mac->lock, flags);
	175
	176	/* Send event */
	177	printkl(KERN_NOTICE PFX "Open Authentication completed with "MAC_FMT"\n", MAC_ARG(net->bssid));
	178	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
	179	break;
	180	default:
	181	/* Lock and reset flags */
	182	spin_lock_irqsave(&mac->lock, flags);
	183	net->authenticated = 0;
	184	net->authenticating = 0;
	185	spin_unlock_irqrestore(&mac->lock, flags);
	186
	187	printkl(KERN_NOTICE PFX "Open Authentication with "MAC_FMT" failed, error code: %i\n",
	188	MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
	189	/* Count the error? */
	190	break;
	191	}
	192	goto free_aq;
	193	break;
	194	case WLAN_AUTH_SHARED_KEY:
	195	/* Figure out where we are in the process */
	196	switch(auth->transaction) {
	197	case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
	198	/* Check to make sure we have a challenge IE */
	199	data = (u8 *)auth->info_element;
200	if(*data++ != MFIE_TYPE_CHALLENGE){
201	printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
202	break;
203	}
204	/* Save the challenge */
205	spin_lock_irqsave(&mac->lock, flags);
206	net->challenge_len = *data++;
207	if(net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
208	net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
209	if(net->challenge != NULL)
210	kfree(net->challenge);
211	net->challenge = kmalloc(net->challenge_len, GFP_ATOMIC);
212	memcpy(net->challenge, data, net->challenge_len);
213	aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
214	spin_unlock_irqrestore(&mac->lock, flags);
215
76ea4c7f	216	/* Send our response */
370121e5	217	ieee80211softmac_send_mgt_frame(mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
76ea4c7f	218	return 0;
370121e5	219	case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
76ea4c7f DD	220	kfree(net->challenge);
	221	net->challenge = NULL;
	222	net->challenge_len = 0;
370121e5 JB	223	/* Check the status code of the response */
	224	switch(auth->status) {
	225	case WLAN_STATUS_SUCCESS:
	226	/* Update the status to Authenticated */
	227	spin_lock_irqsave(&mac->lock, flags);
	228	net->authenticating = 0;
	229	net->authenticated = 1;
	230	spin_unlock_irqrestore(&mac->lock, flags);
	231	printkl(KERN_NOTICE PFX "Shared Key Authentication completed with "MAC_FMT"\n",
	232	MAC_ARG(net->bssid));
76ea4c7f	233	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
370121e5 JB	234	break;
	235	default:
	236	printkl(KERN_NOTICE PFX "Shared Key Authentication with "MAC_FMT" failed, error code: %i\n",
	237	MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
	238	/* Lock and reset flags */
	239	spin_lock_irqsave(&mac->lock, flags);
	240	net->authenticating = 0;
	241	net->authenticated = 0;
	242	spin_unlock_irqrestore(&mac->lock, flags);
	243	/* Count the error? */
	244	break;
	245	}
	246	goto free_aq;
	247	break;
	248	default:
	249	printkl(KERN_WARNING PFX "Unhandled Authentication Step: %i\n", auth->transaction);
	250	break;
	251	}
	252	goto free_aq;
	253	break;
	254	default:
	255	/* ERROR */
	256	goto free_aq;
	257	break;
	258	}
	259	return 0;
	260	free_aq:
	261	/* Cancel the timeout */
	262	spin_lock_irqsave(&mac->lock, flags);
	263	cancel_delayed_work(&aq->work);
	264	/* Remove this item from the queue */
	265	list_del(&aq->list);
	266	spin_unlock_irqrestore(&mac->lock, flags);
	267
	268	/* Free it */
	269	kfree(aq);
	270	return 0;
	271	}
	272
	273	/*
	274	* Handle deauthorization
	275	*/
714e1a51	276	static void
370121e5 JB	277	ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
	278	struct ieee80211softmac_network *net)
	279	{
	280	struct ieee80211softmac_auth_queue_item *aq = NULL;
	281	struct list_head *list_ptr;
	282	unsigned long flags;
	283
6d92f83f DD	284	/* deauthentication implies disassociation */
	285	ieee80211softmac_disassoc(mac);
	286
370121e5 JB	287	/* Lock and reset status flags */
	288	spin_lock_irqsave(&mac->lock, flags);
	289	net->authenticating = 0;
	290	net->authenticated = 0;
	291
	292	/* Find correct auth queue item, if it exists */
	293	list_for_each(list_ptr, &mac->auth_queue) {
	294	aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
	295	if (!memcmp(net->bssid, aq->net->bssid, ETH_ALEN))
	296	break;
	297	else
	298	aq = NULL;
	299	}
	300
	301	/* Cancel pending work */
	302	if(aq != NULL)
	303	/* Not entirely safe? What about running work? */
	304	cancel_delayed_work(&aq->work);
	305
	306	/* Free our network ref */
	307	ieee80211softmac_del_network_locked(mac, net);
	308	if(net->challenge != NULL)
	309	kfree(net->challenge);
	310	kfree(net);
	311
2dd50801 JB	312	/* can't transmit data right now... */
2dd50801 JB	313	netif_carrier_off(mac->dev);
370121e5 JB	314	spin_unlock_irqrestore(&mac->lock, flags);
	315	}
	316
	317	/*
	318	* Sends a deauth request to the desired AP
	319	*/
	320	int
	321	ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac,
	322	struct ieee80211softmac_network *net, int reason)
	323	{
	324	int ret;
	325
370121e5 JB	326	/* Make sure the network is authenticated */
	327	if (!net->authenticated)
	328	{
	329	printkl(KERN_DEBUG PFX "Can't send deauthentication packet, network is not authenticated.\n");
	330	/* Error okay? */
	331	return -EPERM;
	332	}
	333
	334	/* Send the de-auth packet */
	335	if((ret = ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_DEAUTH, reason)))
	336	return ret;
	337
	338	ieee80211softmac_deauth_from_net(mac, net);
	339	return 0;
	340	}
	341
	342	/*
	343	* This should be registered with ieee80211 as handle_deauth
	344	*/
	345	int
b10c991f	346	ieee80211softmac_deauth_resp(struct net_device dev, struct ieee80211_deauth deauth)
370121e5 JB	347	{
	348
	349	struct ieee80211softmac_network *net = NULL;
	350	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	351
d57336e3 DD	352	if (unlikely(!mac->running))
	353	return -ENODEV;
	354
b10c991f	355	if (!deauth) {
370121e5 JB	356	dprintk("deauth without deauth packet. eek!\n");
	357	return 0;
	358	}
	359
b10c991f	360	net = ieee80211softmac_get_network_by_bssid(mac, deauth->header.addr2);
370121e5 JB	361
370121e5 JB	362	if (net == NULL) {
f484d582	363	printkl(KERN_DEBUG PFX "Received deauthentication packet from "MAC_FMT", but that network is unknown.\n",
b10c991f	364	MAC_ARG(deauth->header.addr2));
370121e5 JB	365	return 0;
	366	}
	367
	368	/* Make sure the network is authenticated */
	369	if(!net->authenticated)
	370	{
	371	printkl(KERN_DEBUG PFX "Can't perform deauthentication, network is not authenticated.\n");
	372	/* Error okay? */
	373	return -EPERM;
	374	}
	375
	376	ieee80211softmac_deauth_from_net(mac, net);
995c9926 DD	377
	378	/* let's try to re-associate */
	379	schedule_work(&mac->associnfo.work);
370121e5 JB	380	return 0;
370121e5 JB	381	}