[deliverable/linux.git] / net / ieee80211 / softmac / ieee80211softmac_assoc.c

#include "ieee80211softmac_priv.h"

/*
 * Overview
 *
 * Before you can associate, you have to authenticate.
 * 
 */

/* Sends out an association request to the desired AP */
static void
ieee80211softmac_assoc(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net)
{
	unsigned long flags;
	function_enter();
	/* Switch to correct channel for this network */
	mac->set_channel(mac->dev, net->channel);
	
	/* Send association request */
	ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_ASSOC_REQ, 0);
	
	dprintk(KERN_INFO PFX "sent association request!\n");

	/* Change the state to associating */
	spin_lock_irqsave(&mac->lock, flags);
	mac->associnfo.associating = 1;
	mac->associated = 0; /* just to make sure */
	spin_unlock_irqrestore(&mac->lock, flags);

	/* Set a timer for timeout */
	/* FIXME: make timeout configurable */
	schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
}

void
ieee80211softmac_assoc_timeout(void *d)
{
	struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d;
	unsigned long flags;

	function_enter();

	spin_lock_irqsave(&mac->lock, flags);
	/* we might race against ieee80211softmac_handle_assoc_response,
	 * so make sure only one of us does something */
	if (!mac->associnfo.associating) {
		spin_unlock_irqrestore(&mac->lock, flags);
		return;
	}
	mac->associnfo.associating = 0;
	mac->associnfo.bssvalid = 0;
	mac->associated = 0;
	spin_unlock_irqrestore(&mac->lock, flags);

	dprintk(KERN_INFO PFX "assoc request timed out!\n");
	/* FIXME: we need to know the network here. that requires a bit of restructuring */
	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT, NULL);
}

static void
ieee80211softmac_reassoc(struct ieee80211softmac_device *mac)
{
	function_enter();
}


/* Sends out a disassociation request to the desired AP */
static void
ieee80211softmac_disassoc(struct ieee80211softmac_device *mac, u16 reason)
{
	unsigned long flags;
	struct ieee80211softmac_network *found;
	function_enter();

	if (mac->associnfo.bssvalid && mac->associated) {
		found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
		if (found)
			ieee80211softmac_send_mgt_frame(mac, found, IEEE80211_STYPE_DISASSOC, reason);
	} else if (mac->associnfo.associating) {
		cancel_delayed_work(&mac->associnfo.timeout);
	}

	/* Change our state */
	spin_lock_irqsave(&mac->lock, flags);
	/* Do NOT clear bssvalid as that will break ieee80211softmac_assoc_work! */
	mac->associated = 0;
	mac->associnfo.associating = 0;
	spin_unlock_irqrestore(&mac->lock, flags);
}

static inline int
we_support_all_basic_rates(struct ieee80211softmac_device *mac, u8 *from, u8 from_len)
{
	int idx, search, found;
	u8 rate, search_rate;

	for (idx = 0; idx < (from_len); idx++) {
		rate = (from)[idx];
		if (!(rate & IEEE80211_BASIC_RATE_MASK))
			continue;
		found = 0;
		rate &= ~IEEE80211_BASIC_RATE_MASK;
		for (search = 0; search < mac->ratesinfo.count; search++) {
			search_rate = mac->ratesinfo.rates[search];
			search_rate &= ~IEEE80211_BASIC_RATE_MASK;
			if (rate == search_rate) {
				found = 1;
				break;
			}
		}
		if (!found)
			return 0;
	}
	return 1;
}

static int
network_matches_request(struct ieee80211softmac_device *mac, struct ieee80211_network *net)
{
	/* we cannot associate to networks whose name we don't know */
	if (ieee80211_is_empty_essid(net->ssid, net->ssid_len))
		return 0;
	/* do not associate to a network whose BSSBasicRateSet we cannot support */
	if (!we_support_all_basic_rates(mac, net->rates, net->rates_len))
		return 0;
	/* do we really need to check the ex rates? */
	if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len))
		return 0;

	/* if 'ANY' network requested, take any that doesn't have privacy enabled */
	if (mac->associnfo.req_essid.len == 0 
	    && !(net->capability & WLAN_CAPABILITY_PRIVACY))
		return 1;
	if (net->ssid_len != mac->associnfo.req_essid.len)
		return 0;
	if (!memcmp(net->ssid, mac->associnfo.req_essid.data, mac->associnfo.req_essid.len))
		return 1;
	return 0;
}

static void
ieee80211softmac_assoc_notify(struct net_device *dev, void *context)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	ieee80211softmac_assoc_work((void*)mac);
}

/* This function is called to handle userspace requests (asynchronously) */
void
ieee80211softmac_assoc_work(void *d)
{
	struct ieee80211softmac_device *mac = (struct ieee80211softmac_device *)d;
	struct ieee80211softmac_network *found = NULL;
	struct ieee80211_network *net = NULL, *best = NULL;
	unsigned long flags;
	
	function_enter();
	
	/* meh */
	if (mac->associated)
		ieee80211softmac_disassoc(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT);

	/* try to find the requested network in our list, if we found one already */
	if (mac->associnfo.bssvalid)
		found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);	
	
	/* Search the ieee80211 networks for this network if we didn't find it by bssid,
	 * but only if we've scanned at least once (to get a better list of networks to
	 * select from). If we have not scanned before, the !found logic below will be
	 * invoked and will scan. */
	if (!found && (mac->associnfo.scan_retry < IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT))
	{
		s8 rssi = -128;	/* if I don't initialise, gcc emits an invalid warning
				   because it cannot follow the best pointer logic. */
		spin_lock_irqsave(&mac->ieee->lock, flags);
		list_for_each_entry(net, &mac->ieee->network_list, list) {
			/* we're supposed to find the network with
			 * the best signal here, as we're asked to join
			 * any network with a specific ESSID, and many
			 * different ones could have that.
			 *
			 * I'll for now just go with the reported rssi.
			 *
			 * We also should take into account the rateset
			 * here to find the best BSSID to try.
			 */
			if (network_matches_request(mac, net)) {
				if (!best) {
					best = net;
					rssi = best->stats.rssi;
					continue;
				}
				/* we already had a matching network, so
				 * compare their properties to get the
				 * better of the two ... (see above)
				 */
				if (rssi < net->stats.rssi) {
					best = net;
					rssi = best->stats.rssi;
				}
			}
		}
		/* if we unlock here, we might get interrupted and the `best'
		 * pointer could go stale */
		if (best) {
			found = ieee80211softmac_create_network(mac, best);
			/* if found is still NULL, then we got -ENOMEM somewhere */
			if (found)
				ieee80211softmac_add_network(mac, found);
		}
		spin_unlock_irqrestore(&mac->ieee->lock, flags);
	}

	if (!found) {
		if (mac->associnfo.scan_retry > 0) {
			spin_lock_irqsave(&mac->lock, flags);
			mac->associnfo.scan_retry--;
			spin_unlock_irqrestore(&mac->lock, flags);
		
			/* We know of no such network. Let's scan. 
			 * NB: this also happens if we had no memory to copy the network info...
			 * Maybe we can hope to have more memory after scanning finishes ;)
			 */
			dprintk(KERN_INFO PFX "Associate: Scanning for networks first.\n");
			ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify, NULL);
			if (ieee80211softmac_start_scan(mac))
				dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
			return;
		}
		else {
			spin_lock_irqsave(&mac->lock, flags);
			mac->associnfo.associating = 0;
			mac->associated = 0;
			spin_unlock_irqrestore(&mac->lock, flags);

			dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
			ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
			return;
		}
	}
	
	mac->associnfo.bssvalid = 1;
	memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN);
	/* copy the ESSID for displaying it */
	mac->associnfo.associate_essid.len = found->essid.len;
	memcpy(mac->associnfo.associate_essid.data, found->essid.data, IW_ESSID_MAX_SIZE + 1);
	
	/* we found a network! authenticate (if necessary) and associate to it. */
	if (!found->authenticated) {
		/* This relies on the fact that _auth_req only queues the work,
		 * otherwise adding the notification would be racy. */
		if (!ieee80211softmac_auth_req(mac, found)) {
			dprintk(KERN_INFO PFX "cannot associate without being authenticated, requested authentication\n");
			ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify, NULL, GFP_KERNEL);
		} else {
			printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n");
			ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found);
		}
		return;
	}
	/* finally! now we can start associating */
	ieee80211softmac_assoc(mac, found);
}

/* call this to do whatever is necessary when we're associated */
static void
ieee80211softmac_associated(struct ieee80211softmac_device *mac,
	struct ieee80211_assoc_response * resp,
	struct ieee80211softmac_network *net)
{
	mac->associnfo.associating = 0;
	mac->associated = 1;
	if (mac->set_bssid_filter)
		mac->set_bssid_filter(mac->dev, net->bssid);
	memcpy(mac->ieee->bssid, net->bssid, ETH_ALEN);
	netif_carrier_on(mac->dev);
	
	mac->association_id = le16_to_cpup(&resp->aid);
}

/* received frame handling functions */
int
ieee80211softmac_handle_assoc_response(struct net_device * dev,
				       struct ieee80211_assoc_response * resp,
				       struct ieee80211_network * _ieee80211_network_do_not_use)
{
	/* NOTE: the network parameter has to be ignored by
	 *       this code because it is the ieee80211's pointer
	 *       to the struct, not ours (we made a copy)
	 */
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	u16 status = le16_to_cpup(&resp->status);
	struct ieee80211softmac_network *network = NULL;
	unsigned long flags;
	
	spin_lock_irqsave(&mac->lock, flags);

	if (!mac->associnfo.associating) {
		/* we race against the timeout function, so make sure
		 * only one of us can do work */
		spin_unlock_irqrestore(&mac->lock, flags);
		return 0;
	}
	network = ieee80211softmac_get_network_by_bssid_locked(mac, resp->header.addr3);

	/* someone sending us things without us knowing him? Ignore. */
	if (!network) {
		dprintk(KERN_INFO PFX "Received unrequested assocation response from " MAC_FMT "\n", MAC_ARG(resp->header.addr3));
		spin_unlock_irqrestore(&mac->lock, flags);
		return 0;
	}

	/* now that we know it was for us, we can cancel the timeout */
	cancel_delayed_work(&mac->associnfo.timeout);

	switch (status) {
		case 0:
			dprintk(KERN_INFO PFX "associated!\n");
			ieee80211softmac_associated(mac, resp, network);
			ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATED, network);
			break;
		case WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH:
			if (!network->auth_desynced_once) {
				/* there seem to be a few rare cases where our view of
				 * the world is obscured, or buggy APs that don't DEAUTH
				 * us properly. So we handle that, but allow it only once.
				 */
				printkl(KERN_INFO PFX "We were not authenticated during association, retrying...\n");
				network->authenticated = 0;
				/* we don't want to do this more than once ... */
				network->auth_desynced_once = 1;
				schedule_work(&mac->associnfo.work);
				break;
			}
		default:
			dprintk(KERN_INFO PFX "associating failed (reason: 0x%x)!\n", status);
			mac->associnfo.associating = 0;
			mac->associnfo.bssvalid = 0;
			mac->associated = 0;
			ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, network);
	}
	
	spin_unlock_irqrestore(&mac->lock, flags);
	return 0;
}

int
ieee80211softmac_handle_disassoc(struct net_device * dev,
				 struct ieee80211_disassoc *disassoc)
{
	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	unsigned long flags;
	if (memcmp(disassoc->header.addr2, mac->associnfo.bssid, ETH_ALEN))
		return 0;
	if (memcmp(disassoc->header.addr1, mac->dev->dev_addr, ETH_ALEN))
		return 0;
	dprintk(KERN_INFO PFX "got disassoc frame\n");
	netif_carrier_off(dev);
	spin_lock_irqsave(&mac->lock, flags);
	mac->associnfo.bssvalid = 0;
	mac->associated = 0;
	schedule_work(&mac->associnfo.work);
	spin_unlock_irqrestore(&mac->lock, flags);
	
	return 0;
}
Commit	Line	Data
370121e5 JB	1	#include "ieee80211softmac_priv.h"
	2
	3	/*
	4	* Overview
	5	*
	6	* Before you can associate, you have to authenticate.
	7	*
	8	*/
	9
	10	/* Sends out an association request to the desired AP */
	11	static void
	12	ieee80211softmac_assoc(struct ieee80211softmac_device mac, struct ieee80211softmac_network net)
	13	{
	14	unsigned long flags;
	15	function_enter();
	16	/* Switch to correct channel for this network */
	17	mac->set_channel(mac->dev, net->channel);
	18
	19	/* Send association request */
	20	ieee80211softmac_send_mgt_frame(mac, net, IEEE80211_STYPE_ASSOC_REQ, 0);
	21
	22	dprintk(KERN_INFO PFX "sent association request!\n");
	23
	24	/* Change the state to associating */
	25	spin_lock_irqsave(&mac->lock, flags);
	26	mac->associnfo.associating = 1;
	27	mac->associated = 0; /* just to make sure */
	28	spin_unlock_irqrestore(&mac->lock, flags);
	29
	30	/* Set a timer for timeout */
	31	/* FIXME: make timeout configurable */
5c4df6da	32	schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
370121e5 JB	33	}
	34
	35	void
	36	ieee80211softmac_assoc_timeout(void *d)
	37	{
	38	struct ieee80211softmac_device mac = (struct ieee80211softmac_device )d;
	39	unsigned long flags;
	40
	41	function_enter();
	42
	43	spin_lock_irqsave(&mac->lock, flags);
	44	/* we might race against ieee80211softmac_handle_assoc_response,
	45	* so make sure only one of us does something */
	46	if (!mac->associnfo.associating) {
	47	spin_unlock_irqrestore(&mac->lock, flags);
	48	return;
	49	}
	50	mac->associnfo.associating = 0;
	51	mac->associnfo.bssvalid = 0;
	52	mac->associated = 0;
	53	spin_unlock_irqrestore(&mac->lock, flags);
	54
	55	dprintk(KERN_INFO PFX "assoc request timed out!\n");
	56	/* FIXME: we need to know the network here. that requires a bit of restructuring */
	57	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT, NULL);
	58	}
	59
	60	static void
	61	ieee80211softmac_reassoc(struct ieee80211softmac_device *mac)
	62	{
	63	function_enter();
	64	}
	65
	66
	67	/* Sends out a disassociation request to the desired AP */
	68	static void
	69	ieee80211softmac_disassoc(struct ieee80211softmac_device *mac, u16 reason)
	70	{
	71	unsigned long flags;
	72	struct ieee80211softmac_network *found;
	73	function_enter();
	74
	75	if (mac->associnfo.bssvalid && mac->associated) {
	76	found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
	77	if (found)
	78	ieee80211softmac_send_mgt_frame(mac, found, IEEE80211_STYPE_DISASSOC, reason);
	79	} else if (mac->associnfo.associating) {
	80	cancel_delayed_work(&mac->associnfo.timeout);
	81	}
	82
	83	/* Change our state */
	84	spin_lock_irqsave(&mac->lock, flags);
	85	/* Do NOT clear bssvalid as that will break ieee80211softmac_assoc_work! */
	86	mac->associated = 0;
	87	mac->associnfo.associating = 0;
	88	spin_unlock_irqrestore(&mac->lock, flags);
	89	}
	90
	91	static inline int
	92	we_support_all_basic_rates(struct ieee80211softmac_device mac, u8 from, u8 from_len)
	93	{
	94	int idx, search, found;
	95	u8 rate, search_rate;
	96
97	for (idx = 0; idx < (from_len); idx++) {
98	rate = (from)[idx];
99	if (!(rate & IEEE80211_BASIC_RATE_MASK))
100	continue;
101	found = 0;
102	rate &= ~IEEE80211_BASIC_RATE_MASK;
103	for (search = 0; search < mac->ratesinfo.count; search++) {
104	search_rate = mac->ratesinfo.rates[search];
105	search_rate &= ~IEEE80211_BASIC_RATE_MASK;
106	if (rate == search_rate) {
107	found = 1;
108	break;
109	}
110	}
111	if (!found)
112	return 0;
113	}
114	return 1;
115	}
116
117	static int
118	network_matches_request(struct ieee80211softmac_device mac, struct ieee80211_network net)
119	{
120	/* we cannot associate to networks whose name we don't know */
121	if (ieee80211_is_empty_essid(net->ssid, net->ssid_len))
122	return 0;
123	/* do not associate to a network whose BSSBasicRateSet we cannot support */
124	if (!we_support_all_basic_rates(mac, net->rates, net->rates_len))
125	return 0;
126	/* do we really need to check the ex rates? */
127	if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len))
128	return 0;
129
130	/* if 'ANY' network requested, take any that doesn't have privacy enabled */
131	if (mac->associnfo.req_essid.len == 0
132	&& !(net->capability & WLAN_CAPABILITY_PRIVACY))
133	return 1;
134	if (net->ssid_len != mac->associnfo.req_essid.len)
135	return 0;
136	if (!memcmp(net->ssid, mac->associnfo.req_essid.data, mac->associnfo.req_essid.len))
137	return 1;
138	return 0;
139	}
140
141	static void
142	ieee80211softmac_assoc_notify(struct net_device dev, void context)
143	{
144	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
145	ieee80211softmac_assoc_work((void*)mac);
146	}
147
148	/* This function is called to handle userspace requests (asynchronously) */
149	void
150	ieee80211softmac_assoc_work(void *d)
151	{
152	struct ieee80211softmac_device mac = (struct ieee80211softmac_device )d;
153	struct ieee80211softmac_network *found = NULL;
154	struct ieee80211_network net = NULL, best = NULL;
155	unsigned long flags;
156
157	function_enter();
158
159	/* meh */
160	if (mac->associated)
161	ieee80211softmac_disassoc(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT);
162
163	/* try to find the requested network in our list, if we found one already */
164	if (mac->associnfo.bssvalid)
165	found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
166
1dc09776 JB	167	/* Search the ieee80211 networks for this network if we didn't find it by bssid,
	168	* but only if we've scanned at least once (to get a better list of networks to
	169	* select from). If we have not scanned before, the !found logic below will be
	170	* invoked and will scan. */
	171	if (!found && (mac->associnfo.scan_retry < IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT))
370121e5	172	{
78e4f36e JB	173	s8 rssi = -128; /* if I don't initialise, gcc emits an invalid warning
78e4f36e JB	174	because it cannot follow the best pointer logic. */
370121e5 JB	175	spin_lock_irqsave(&mac->ieee->lock, flags);
	176	list_for_each_entry(net, &mac->ieee->network_list, list) {
	177	/* we're supposed to find the network with
	178	* the best signal here, as we're asked to join
	179	* any network with a specific ESSID, and many
	180	* different ones could have that.
	181	*
78e4f36e	182	* I'll for now just go with the reported rssi.
370121e5 JB	183	*
	184	* We also should take into account the rateset
	185	* here to find the best BSSID to try.
	186	*/
	187	if (network_matches_request(mac, net)) {
	188	if (!best) {
	189	best = net;
78e4f36e	190	rssi = best->stats.rssi;
370121e5 JB	191	continue;
	192	}
	193	/* we already had a matching network, so
	194	* compare their properties to get the
	195	* better of the two ... (see above)
	196	*/
78e4f36e JB	197	if (rssi < net->stats.rssi) {
	198	best = net;
	199	rssi = best->stats.rssi;
	200	}
370121e5 JB	201	}
	202	}
	203	/* if we unlock here, we might get interrupted and the `best'
	204	* pointer could go stale */
	205	if (best) {
	206	found = ieee80211softmac_create_network(mac, best);
	207	/* if found is still NULL, then we got -ENOMEM somewhere */
	208	if (found)
	209	ieee80211softmac_add_network(mac, found);
	210	}
	211	spin_unlock_irqrestore(&mac->ieee->lock, flags);
	212	}
	213
	214	if (!found) {
	215	if (mac->associnfo.scan_retry > 0) {
	216	spin_lock_irqsave(&mac->lock, flags);
	217	mac->associnfo.scan_retry--;
	218	spin_unlock_irqrestore(&mac->lock, flags);
	219
	220	/* We know of no such network. Let's scan.
	221	* NB: this also happens if we had no memory to copy the network info...
	222	* Maybe we can hope to have more memory after scanning finishes ;)
	223	*/
1dc09776	224	dprintk(KERN_INFO PFX "Associate: Scanning for networks first.\n");
370121e5 JB	225	ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify, NULL);
370121e5 JB	226	if (ieee80211softmac_start_scan(mac))
1dc09776	227	dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
370121e5 JB	228	return;
	229	}
	230	else {
	231	spin_lock_irqsave(&mac->lock, flags);
	232	mac->associnfo.associating = 0;
	233	mac->associated = 0;
	234	spin_unlock_irqrestore(&mac->lock, flags);
	235
1dc09776	236	dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
370121e5 JB	237	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
	238	return;
	239	}
	240	}
	241
	242	mac->associnfo.bssvalid = 1;
	243	memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN);
	244	/* copy the ESSID for displaying it */
	245	mac->associnfo.associate_essid.len = found->essid.len;
	246	memcpy(mac->associnfo.associate_essid.data, found->essid.data, IW_ESSID_MAX_SIZE + 1);
	247
	248	/* we found a network! authenticate (if necessary) and associate to it. */
	249	if (!found->authenticated) {
	250	/* This relies on the fact that _auth_req only queues the work,
	251	* otherwise adding the notification would be racy. */
	252	if (!ieee80211softmac_auth_req(mac, found)) {
	253	dprintk(KERN_INFO PFX "cannot associate without being authenticated, requested authentication\n");
	254	ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify, NULL, GFP_KERNEL);
	255	} else {
	256	printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n");
	257	ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found);
	258	}
	259	return;
	260	}
	261	/* finally! now we can start associating */
	262	ieee80211softmac_assoc(mac, found);
	263	}
	264
	265	/* call this to do whatever is necessary when we're associated */
	266	static void
	267	ieee80211softmac_associated(struct ieee80211softmac_device *mac,
	268	struct ieee80211_assoc_response * resp,
	269	struct ieee80211softmac_network *net)
	270	{
	271	mac->associnfo.associating = 0;
	272	mac->associated = 1;
	273	if (mac->set_bssid_filter)
	274	mac->set_bssid_filter(mac->dev, net->bssid);
	275	memcpy(mac->ieee->bssid, net->bssid, ETH_ALEN);
2dd50801	276	netif_carrier_on(mac->dev);
370121e5 JB	277
	278	mac->association_id = le16_to_cpup(&resp->aid);
	279	}
	280
	281	/* received frame handling functions */
	282	int
	283	ieee80211softmac_handle_assoc_response(struct net_device * dev,
	284	struct ieee80211_assoc_response * resp,
	285	struct ieee80211_network * _ieee80211_network_do_not_use)
	286	{
	287	/* NOTE: the network parameter has to be ignored by
	288	* this code because it is the ieee80211's pointer
	289	* to the struct, not ours (we made a copy)
	290	*/
	291	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	292	u16 status = le16_to_cpup(&resp->status);
	293	struct ieee80211softmac_network *network = NULL;
	294	unsigned long flags;
	295
	296	spin_lock_irqsave(&mac->lock, flags);
	297
	298	if (!mac->associnfo.associating) {
	299	/* we race against the timeout function, so make sure
	300	* only one of us can do work */
	301	spin_unlock_irqrestore(&mac->lock, flags);
	302	return 0;
	303	}
	304	network = ieee80211softmac_get_network_by_bssid_locked(mac, resp->header.addr3);
	305
	306	/* someone sending us things without us knowing him? Ignore. */
	307	if (!network) {
	308	dprintk(KERN_INFO PFX "Received unrequested assocation response from " MAC_FMT "\n", MAC_ARG(resp->header.addr3));
	309	spin_unlock_irqrestore(&mac->lock, flags);
	310	return 0;
	311	}
	312
	313	/* now that we know it was for us, we can cancel the timeout */
	314	cancel_delayed_work(&mac->associnfo.timeout);
	315
	316	switch (status) {
	317	case 0:
	318	dprintk(KERN_INFO PFX "associated!\n");
	319	ieee80211softmac_associated(mac, resp, network);
	320	ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATED, network);
	321	break;
	322	case WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH:
	323	if (!network->auth_desynced_once) {
	324	/* there seem to be a few rare cases where our view of
	325	* the world is obscured, or buggy APs that don't DEAUTH
	326	* us properly. So we handle that, but allow it only once.
	327	*/
	328	printkl(KERN_INFO PFX "We were not authenticated during association, retrying...\n");
	329	network->authenticated = 0;
	330	/* we don't want to do this more than once ... */
	331	network->auth_desynced_once = 1;
5c4df6da	332	schedule_work(&mac->associnfo.work);
370121e5 JB	333	break;
	334	}
	335	default:
	336	dprintk(KERN_INFO PFX "associating failed (reason: 0x%x)!\n", status);
	337	mac->associnfo.associating = 0;
	338	mac->associnfo.bssvalid = 0;
	339	mac->associated = 0;
	340	ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, network);
	341	}
	342
	343	spin_unlock_irqrestore(&mac->lock, flags);
	344	return 0;
	345	}
	346
	347	int
	348	ieee80211softmac_handle_disassoc(struct net_device * dev,
	349	struct ieee80211_disassoc *disassoc)
	350	{
	351	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
	352	unsigned long flags;
48b2e4ce JB	353	if (memcmp(disassoc->header.addr2, mac->associnfo.bssid, ETH_ALEN))
	354	return 0;
	355	if (memcmp(disassoc->header.addr1, mac->dev->dev_addr, ETH_ALEN))
	356	return 0;
370121e5	357	dprintk(KERN_INFO PFX "got disassoc frame\n");
2dd50801	358	netif_carrier_off(dev);
370121e5 JB	359	spin_lock_irqsave(&mac->lock, flags);
	360	mac->associnfo.bssvalid = 0;
	361	mac->associated = 0;
d1469cf2	362	schedule_work(&mac->associnfo.work);
370121e5 JB	363	spin_unlock_irqrestore(&mac->lock, flags);
	364
	365	return 0;
	366	}