net/ieee80211/softmac/ieee80211softmac_auth.c - linux/kernel/git/bpf/bpf-next - Git at Google

 /*
  * 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;
 }
	/*
	* 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;
	}