[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(struct work_struct *work);

/* 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 || net->authenticated)
		return 0;
	net->authenticating = 1;

	/* 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_DELAYED_WORK(&auth->work, ieee80211softmac_auth_queue);
	
	/* Lock (for list) */
	spin_lock_irqsave(&mac->lock, flags);

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


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

	auth = container_of(work, struct ieee80211softmac_auth_queue_item,
			    work.work);
	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;
		/* 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);
}

/* Sends a response to an auth challenge (for shared key auth). */
static void
ieee80211softmac_auth_challenge_response(struct work_struct *work)
{
	struct ieee80211softmac_auth_queue_item *aq =
		container_of(work, struct ieee80211softmac_auth_queue_item,
			     work.work);

	/* Send our response */
	ieee80211softmac_send_mgt_frame(aq->mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
}

/* 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)
	{
		dprintkl(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)
	{
		dprintkl(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;
			kfree(net->challenge);
			net->challenge = kmemdup(data, net->challenge_len,
						 GFP_ATOMIC);
			if (net->challenge == NULL) {
				printkl(KERN_NOTICE PFX "Shared Key "
					"Authentication failed due to "
					"memory shortage.\n");
				spin_unlock_irqrestore(&mac->lock, flags);
				break;
			}
			aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE; 

			/* We reuse the work struct from the auth request here.
			 * It is safe to do so as each one is per-request, and
			 * at this point (dealing with authentication response)
			 * we have obviously already sent the initial auth
			 * request. */
			cancel_delayed_work(&aq->work);
			INIT_DELAYED_WORK(&aq->work, &ieee80211softmac_auth_challenge_response);
			schedule_delayed_work(&aq->work, 0);
			spin_unlock_irqrestore(&mac->lock, flags);
			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);

	ieee80211softmac_try_reassoc(mac);
}

/* 
 * 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)
	{
		dprintkl(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) {
		dprintkl(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)
	{
		dprintkl(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_delayed_work(&mac->associnfo.work, 0);
	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"
370121e5 JB	28
c4028958	29	static void ieee80211softmac_auth_queue(struct work_struct *work);
370121e5 JB	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
cb74c432	39	if (net->authenticating \|\| net->authenticated)
370121e5	40	return 0;
cb74c432	41	net->authenticating = 1;
370121e5 JB	42
	43	/* Add the network if it's not already added */
	44	ieee80211softmac_add_network(mac, net);
	45
	46	dprintk(KERN_NOTICE PFX "Queueing Authentication Request to "MAC_FMT"\n", MAC_ARG(net->bssid));
	47	/* Queue the auth request */
	48	auth = (struct ieee80211softmac_auth_queue_item *)
	49	kmalloc(sizeof(struct ieee80211softmac_auth_queue_item), GFP_KERNEL);
	50	if(auth == NULL)
	51	return -ENOMEM;
	52
	53	auth->net = net;
	54	auth->mac = mac;
	55	auth->retry = IEEE80211SOFTMAC_AUTH_RETRY_LIMIT;
	56	auth->state = IEEE80211SOFTMAC_AUTH_OPEN_REQUEST;
c4028958	57	INIT_DELAYED_WORK(&auth->work, ieee80211softmac_auth_queue);
370121e5 JB	58
	59	/* Lock (for list) */
	60	spin_lock_irqsave(&mac->lock, flags);
	61
	62	/* add to list */
	63	list_add_tail(&auth->list, &mac->auth_queue);
c4028958	64	schedule_delayed_work(&auth->work, 0);
370121e5 JB	65	spin_unlock_irqrestore(&mac->lock, flags);
	66
	67	return 0;
	68	}
	69
	70
	71	/* Sends an auth request to the desired AP and handles timeouts */
	72	static void
c4028958	73	ieee80211softmac_auth_queue(struct work_struct *work)
370121e5 JB	74	{
	75	struct ieee80211softmac_device *mac;
	76	struct ieee80211softmac_auth_queue_item *auth;
	77	struct ieee80211softmac_network *net;
	78	unsigned long flags;
	79
c4028958 DH	80	auth = container_of(work, struct ieee80211softmac_auth_queue_item,
c4028958 DH	81	work.work);
370121e5 JB	82	net = auth->net;
	83	mac = auth->mac;
	84
	85	if(auth->retry > 0) {
	86	/* Switch to correct channel for this network */
	87	mac->set_channel(mac->dev, net->channel);
	88
	89	/* Lock and set flags */
	90	spin_lock_irqsave(&mac->lock, flags);
d57336e3 DD	91	if (unlikely(!mac->running)) {
	92	/* Prevent reschedule on workqueue flush */
	93	spin_unlock_irqrestore(&mac->lock, flags);
	94	return;
	95	}
370121e5	96	net->authenticated = 0;
370121e5	97	/* add a timeout call so we eventually give up waiting for an auth reply */
5c4df6da	98	schedule_delayed_work(&auth->work, IEEE80211SOFTMAC_AUTH_TIMEOUT);
370121e5 JB	99	auth->retry--;
	100	spin_unlock_irqrestore(&mac->lock, flags);
	101	if (ieee80211softmac_send_mgt_frame(mac, auth->net, IEEE80211_STYPE_AUTH, auth->state))
	102	dprintk(KERN_NOTICE PFX "Sending Authentication Request to "MAC_FMT" failed (this shouldn't happen, wait for the timeout).\n", MAC_ARG(net->bssid));
	103	else
	104	dprintk(KERN_NOTICE PFX "Sent Authentication Request to "MAC_FMT".\n", MAC_ARG(net->bssid));
	105	return;
	106	}
	107
	108	printkl(KERN_WARNING PFX "Authentication timed out with "MAC_FMT"\n", MAC_ARG(net->bssid));
	109	/* Remove this item from the queue */
	110	spin_lock_irqsave(&mac->lock, flags);
76ea4c7f	111	net->authenticating = 0;
370121e5 JB	112	ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT, net);
	113	cancel_delayed_work(&auth->work); /* just to make sure... */
	114	list_del(&auth->list);
	115	spin_unlock_irqrestore(&mac->lock, flags);
	116	/* Free it */
	117	kfree(auth);
	118	}
	119
345f6b8b DD	120	/* Sends a response to an auth challenge (for shared key auth). */
345f6b8b DD	121	static void
c4028958	122	ieee80211softmac_auth_challenge_response(struct work_struct *work)
345f6b8b	123	{
c4028958 DH	124	struct ieee80211softmac_auth_queue_item *aq =
	125	container_of(work, struct ieee80211softmac_auth_queue_item,
	126	work.work);
345f6b8b DD	127
	128	/* Send our response */
	129	ieee80211softmac_send_mgt_frame(aq->mac, aq->net, IEEE80211_STYPE_AUTH, aq->state);
	130	}
	131
370121e5 JB	132	/* Handle the auth response from the AP
	133	* This should be registered with ieee80211 as handle_auth
	134	*/
	135	int
	136	ieee80211softmac_auth_resp(struct net_device dev, struct ieee80211_auth auth)
	137	{
	138
	139	struct list_head *list_ptr;
	140	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	141	struct ieee80211softmac_auth_queue_item *aq = NULL;
	142	struct ieee80211softmac_network *net = NULL;
	143	unsigned long flags;
	144	u8 * data;
	145
d57336e3 DD	146	if (unlikely(!mac->running))
	147	return -ENODEV;
	148
370121e5 JB	149	/* Find correct auth queue item */
	150	spin_lock_irqsave(&mac->lock, flags);
	151	list_for_each(list_ptr, &mac->auth_queue) {
	152	aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
	153	net = aq->net;
	154	if (!memcmp(net->bssid, auth->header.addr2, ETH_ALEN))
	155	break;
	156	else
	157	aq = NULL;
	158	}
	159	spin_unlock_irqrestore(&mac->lock, flags);
	160
	161	/* Make sure that we've got an auth queue item for this request */
	162	if(aq == NULL)
	163	{
5398d590	164	dprintkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but no queue item exists.\n", MAC_ARG(auth->header.addr2));
370121e5 JB	165	/* Error #? */
	166	return -1;
	167	}
	168
	169	/* Check for out of order authentication */
	170	if(!net->authenticating)
	171	{
5398d590	172	dprintkl(KERN_DEBUG PFX "Authentication response received from "MAC_FMT" but did not request authentication.\n",MAC_ARG(auth->header.addr2));
370121e5 JB	173	return -1;
	174	}
	175
	176	/* Parse the auth packet */
	177	switch(auth->algorithm) {
	178	case WLAN_AUTH_OPEN:
	179	/* Check the status code of the response */
	180
	181	switch(auth->status) {
	182	case WLAN_STATUS_SUCCESS:
	183	/* Update the status to Authenticated */
	184	spin_lock_irqsave(&mac->lock, flags);
	185	net->authenticating = 0;
	186	net->authenticated = 1;
	187	spin_unlock_irqrestore(&mac->lock, flags);
	188
	189	/* Send event */
	190	printkl(KERN_NOTICE PFX "Open Authentication completed with "MAC_FMT"\n", MAC_ARG(net->bssid));
	191	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
	192	break;
	193	default:
	194	/* Lock and reset flags */
	195	spin_lock_irqsave(&mac->lock, flags);
	196	net->authenticated = 0;
	197	net->authenticating = 0;
	198	spin_unlock_irqrestore(&mac->lock, flags);
	199
	200	printkl(KERN_NOTICE PFX "Open Authentication with "MAC_FMT" failed, error code: %i\n",
	201	MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
	202	/* Count the error? */
	203	break;
	204	}
	205	goto free_aq;
	206	break;
	207	case WLAN_AUTH_SHARED_KEY:
	208	/* Figure out where we are in the process */
	209	switch(auth->transaction) {
	210	case IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE:
	211	/* Check to make sure we have a challenge IE */
	212	data = (u8 *)auth->info_element;
345f6b8b	213	if (*data++ != MFIE_TYPE_CHALLENGE) {
370121e5 JB	214	printkl(KERN_NOTICE PFX "Shared Key Authentication failed due to a missing challenge.\n");
	215	break;
	216	}
	217	/* Save the challenge */
	218	spin_lock_irqsave(&mac->lock, flags);
	219	net->challenge_len = *data++;
345f6b8b	220	if (net->challenge_len > WLAN_AUTH_CHALLENGE_LEN)
370121e5	221	net->challenge_len = WLAN_AUTH_CHALLENGE_LEN;
571d6eee ACM	222	kfree(net->challenge);
	223	net->challenge = kmemdup(data, net->challenge_len,
	224	GFP_ATOMIC);
	225	if (net->challenge == NULL) {
	226	printkl(KERN_NOTICE PFX "Shared Key "
	227	"Authentication failed due to "
	228	"memory shortage.\n");
	229	spin_unlock_irqrestore(&mac->lock, flags);
	230	break;
	231	}
370121e5	232	aq->state = IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE;
370121e5	233
345f6b8b DD	234	/* We reuse the work struct from the auth request here.
	235	* It is safe to do so as each one is per-request, and
	236	* at this point (dealing with authentication response)
	237	* we have obviously already sent the initial auth
	238	* request. */
	239	cancel_delayed_work(&aq->work);
c4028958 DH	240	INIT_DELAYED_WORK(&aq->work, &ieee80211softmac_auth_challenge_response);
c4028958 DH	241	schedule_delayed_work(&aq->work, 0);
345f6b8b	242	spin_unlock_irqrestore(&mac->lock, flags);
76ea4c7f	243	return 0;
370121e5	244	case IEEE80211SOFTMAC_AUTH_SHARED_PASS:
76ea4c7f DD	245	kfree(net->challenge);
	246	net->challenge = NULL;
	247	net->challenge_len = 0;
370121e5 JB	248	/* Check the status code of the response */
	249	switch(auth->status) {
	250	case WLAN_STATUS_SUCCESS:
	251	/* Update the status to Authenticated */
	252	spin_lock_irqsave(&mac->lock, flags);
	253	net->authenticating = 0;
	254	net->authenticated = 1;
	255	spin_unlock_irqrestore(&mac->lock, flags);
	256	printkl(KERN_NOTICE PFX "Shared Key Authentication completed with "MAC_FMT"\n",
	257	MAC_ARG(net->bssid));
76ea4c7f	258	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_AUTHENTICATED, net);
370121e5 JB	259	break;
	260	default:
	261	printkl(KERN_NOTICE PFX "Shared Key Authentication with "MAC_FMT" failed, error code: %i\n",
	262	MAC_ARG(net->bssid), le16_to_cpup(&auth->status));
	263	/* Lock and reset flags */
	264	spin_lock_irqsave(&mac->lock, flags);
	265	net->authenticating = 0;
	266	net->authenticated = 0;
	267	spin_unlock_irqrestore(&mac->lock, flags);
	268	/* Count the error? */
	269	break;
	270	}
	271	goto free_aq;
	272	break;
	273	default:
	274	printkl(KERN_WARNING PFX "Unhandled Authentication Step: %i\n", auth->transaction);
	275	break;
	276	}
	277	goto free_aq;
	278	break;
	279	default:
	280	/* ERROR */
	281	goto free_aq;
	282	break;
	283	}
	284	return 0;
	285	free_aq:
	286	/* Cancel the timeout */
	287	spin_lock_irqsave(&mac->lock, flags);
	288	cancel_delayed_work(&aq->work);
	289	/* Remove this item from the queue */
	290	list_del(&aq->list);
	291	spin_unlock_irqrestore(&mac->lock, flags);
	292
	293	/* Free it */
	294	kfree(aq);
	295	return 0;
	296	}
	297
	298	/*
	299	* Handle deauthorization
	300	*/
714e1a51	301	static void
370121e5 JB	302	ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
	303	struct ieee80211softmac_network *net)
	304	{
	305	struct ieee80211softmac_auth_queue_item *aq = NULL;
	306	struct list_head *list_ptr;
	307	unsigned long flags;
	308
6d92f83f DD	309	/* deauthentication implies disassociation */
	310	ieee80211softmac_disassoc(mac);
	311
370121e5 JB	312	/* Lock and reset status flags */
	313	spin_lock_irqsave(&mac->lock, flags);
	314	net->authenticating = 0;
	315	net->authenticated = 0;
	316
	317	/* Find correct auth queue item, if it exists */
	318	list_for_each(list_ptr, &mac->auth_queue) {
	319	aq = list_entry(list_ptr, struct ieee80211softmac_auth_queue_item, list);
	320	if (!memcmp(net->bssid, aq->net->bssid, ETH_ALEN))
	321	break;
	322	else
	323	aq = NULL;
	324	}
	325
	326	/* Cancel pending work */
	327	if(aq != NULL)
	328	/* Not entirely safe? What about running work? */
	329	cancel_delayed_work(&aq->work);
	330
	331	/* Free our network ref */
	332	ieee80211softmac_del_network_locked(mac, net);
	333	if(net->challenge != NULL)
	334	kfree(net->challenge);
	335	kfree(net);
	336
2dd50801 JB	337	/* can't transmit data right now... */
2dd50801 JB	338	netif_carrier_off(mac->dev);
370121e5	339	spin_unlock_irqrestore(&mac->lock, flags);
2b50c245 UK	340
2b50c245 UK	341	ieee80211softmac_try_reassoc(mac);
370121e5 JB	342	}
	343
	344	/*
	345	* Sends a deauth request to the desired AP
	346	*/
	347	int
	348	ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac,
	349	struct ieee80211softmac_network *net, int reason)
	350	{
	351	int ret;
	352
370121e5 JB	353	/* Make sure the network is authenticated */
	354	if (!net->authenticated)
	355	{
5398d590	356	dprintkl(KERN_DEBUG PFX "Can't send deauthentication packet, network is not authenticated.\n");
370121e5 JB	357	/* Error okay? */
	358	return -EPERM;
	359	}
	360
	361	/* Send the de-auth packet */
	362	if((ret = ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_DEAUTH, reason)))
	363	return ret;
	364
	365	ieee80211softmac_deauth_from_net(mac, net);
	366	return 0;
	367	}
	368
	369	/*
	370	* This should be registered with ieee80211 as handle_deauth
	371	*/
	372	int
b10c991f	373	ieee80211softmac_deauth_resp(struct net_device dev, struct ieee80211_deauth deauth)
370121e5 JB	374	{
	375
	376	struct ieee80211softmac_network *net = NULL;
	377	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	378
d57336e3 DD	379	if (unlikely(!mac->running))
	380	return -ENODEV;
	381
b10c991f	382	if (!deauth) {
370121e5 JB	383	dprintk("deauth without deauth packet. eek!\n");
	384	return 0;
	385	}
	386
b10c991f	387	net = ieee80211softmac_get_network_by_bssid(mac, deauth->header.addr2);
370121e5 JB	388
370121e5 JB	389	if (net == NULL) {
5398d590	390	dprintkl(KERN_DEBUG PFX "Received deauthentication packet from "MAC_FMT", but that network is unknown.\n",
b10c991f	391	MAC_ARG(deauth->header.addr2));
370121e5 JB	392	return 0;
	393	}
	394
	395	/* Make sure the network is authenticated */
	396	if(!net->authenticated)
	397	{
5398d590	398	dprintkl(KERN_DEBUG PFX "Can't perform deauthentication, network is not authenticated.\n");
370121e5 JB	399	/* Error okay? */
	400	return -EPERM;
	401	}
	402
	403	ieee80211softmac_deauth_from_net(mac, net);
995c9926 DD	404
995c9926 DD	405	/* let's try to re-associate */
c4028958	406	schedule_delayed_work(&mac->associnfo.work, 0);
370121e5 JB	407	return 0;
370121e5 JB	408	}