+/*
+ * This file contains the softmac's association 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"
/*
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);
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);
+ if (likely(mac->running))
+ schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
+ spin_unlock_irqrestore(&mac->lock, flags);
}
void
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 */
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);
/* Do NOT clear bssvalid as that will break ieee80211softmac_assoc_work! */
mac->associated = 0;
mac->associnfo.associating = 0;
+ ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_DISASSOCIATED, NULL);
spin_unlock_irqrestore(&mac->lock, flags);
}
if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len))
return 0;
+ /* assume that users know what they're doing ...
+ * (note we don't let them select a net we're incompatible with) */
+ if (mac->associnfo.bssfixed) {
+ return !memcmp(mac->associnfo.bssid, net->bssid, ETH_ALEN);
+ }
+
/* if 'ANY' network requested, take any that doesn't have privacy enabled */
if (mac->associnfo.req_essid.len == 0
&& !(net->capability & WLAN_CAPABILITY_PRIVACY))
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)
+ if (mac->associnfo.bssvalid || mac->associnfo.bssfixed)
found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);
- /* Search the ieee80211 networks for this network if we didn't find it */
- if (!found)
+ /* 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. */
* 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: Network not known, trying to initiate scan: ");
+ 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("failed.\n");
- else
- dprintk("ok.\n");
+ dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
return;
- }
- else {
+ } 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 network after scan!\n");
+ dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
+ /* reset the retry counter for the next user request since we
+ * break out and don't reschedule ourselves after this point. */
+ mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
return;
}
}
-
+
+ /* reset the retry counter for the next user request since we
+ * now found a net and will try to associate to it, but not
+ * schedule this function again. */
+ mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
mac->associnfo.bssvalid = 1;
memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN);
/* copy the ESSID for displaying it */
u16 status = le16_to_cpup(&resp->status);
struct ieee80211softmac_network *network = NULL;
unsigned long flags;
+
+ if (unlikely(!mac->running))
+ return -ENODEV;
spin_lock_irqsave(&mac->lock, flags);
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
- /* FIXME: check that this frame is from the right AP!! */
+
+ if (unlikely(!mac->running))
+ return -ENODEV;
+
+ 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;
+ ieee80211softmac_call_events_locked(mac, IEEE80211SOFTMAC_EVENT_DISASSOCIATED, NULL);
schedule_work(&mac->associnfo.work);
spin_unlock_irqrestore(&mac->lock, flags);
return 0;
}
+
+int
+ieee80211softmac_handle_reassoc_req(struct net_device * dev,
+ struct ieee80211_reassoc_request * resp)
+{
+ struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+ struct ieee80211softmac_network *network;
+
+ if (unlikely(!mac->running))
+ return -ENODEV;
+
+ network = ieee80211softmac_get_network_by_bssid(mac, resp->header.addr3);
+ if (!network) {
+ dprintkl(KERN_INFO PFX "reassoc request from unknown network\n");
+ return 0;
+ }
+ schedule_work(&mac->associnfo.work);
+
+ return 0;
+}
projects / linux-2.6 / blobdiff