+/*
+ * Contains some basic softmac functions along with module registration code etc.
+ *
+ * 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"
#include <linux/sort.h>
+#include <linux/etherdevice.h>
struct net_device *alloc_ieee80211softmac(int sizeof_priv)
{
struct ieee80211softmac_device *softmac;
struct net_device *dev;
-
- dev = alloc_ieee80211(sizeof(struct ieee80211softmac_device) + sizeof_priv);
+
+ dev = alloc_ieee80211(sizeof(*softmac) + sizeof_priv);
+ if (!dev)
+ return NULL;
softmac = ieee80211_priv(dev);
+ softmac->wq = create_freezeable_workqueue("softmac");
+ if (!softmac->wq) {
+ free_ieee80211(dev);
+ return NULL;
+ }
+
softmac->dev = dev;
softmac->ieee = netdev_priv(dev);
spin_lock_init(&softmac->lock);
-
+
softmac->ieee->handle_auth = ieee80211softmac_auth_resp;
softmac->ieee->handle_deauth = ieee80211softmac_deauth_resp;
softmac->ieee->handle_assoc_response = ieee80211softmac_handle_assoc_response;
+ softmac->ieee->handle_reassoc_request = ieee80211softmac_handle_reassoc_req;
softmac->ieee->handle_disassoc = ieee80211softmac_handle_disassoc;
+ softmac->ieee->handle_beacon = ieee80211softmac_handle_beacon;
softmac->scaninfo = NULL;
+ softmac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
+
/* TODO: initialise all the other callbacks in the ieee struct
* (once they're written)
*/
INIT_LIST_HEAD(&softmac->network_list);
INIT_LIST_HEAD(&softmac->events);
- INIT_WORK(&softmac->associnfo.work, ieee80211softmac_assoc_work, softmac);
- INIT_WORK(&softmac->associnfo.timeout, ieee80211softmac_assoc_timeout, softmac);
+ mutex_init(&softmac->associnfo.mutex);
+ INIT_DELAYED_WORK(&softmac->associnfo.work, ieee80211softmac_assoc_work);
+ INIT_DELAYED_WORK(&softmac->associnfo.timeout, ieee80211softmac_assoc_timeout);
softmac->start_scan = ieee80211softmac_start_scan_implementation;
softmac->wait_for_scan = ieee80211softmac_wait_for_scan_implementation;
softmac->stop_scan = ieee80211softmac_stop_scan_implementation;
- //TODO: The mcast rate has to be assigned dynamically somewhere (in scanning, association. Not sure...)
- // It has to be set to the highest rate all stations in the current network can handle.
- softmac->txrates.mcast_rate = IEEE80211_CCK_RATE_1MB;
- softmac->txrates.mcast_fallback = IEEE80211_CCK_RATE_1MB;
- /* This is reassigned in ieee80211softmac_start to sane values. */
- softmac->txrates.default_rate = IEEE80211_CCK_RATE_1MB;
- softmac->txrates.default_fallback = IEEE80211_CCK_RATE_1MB;
-
- /* should we also assign softmac->mgmt_xmit here so
- * that it is always valid? If so, we probably want
- * to define a new function for that which just
- * wraps ieee80211_tx_frame
- */
-
- /* until associated, we're not ready */
- dev->flags &= ~IFF_RUNNING;
+ /* to start with, we can't send anything ... */
+ netif_carrier_off(dev);
return dev;
-
-err_free_ieee80211:
- free_ieee80211(dev);
-
- return NULL;
}
+EXPORT_SYMBOL_GPL(alloc_ieee80211softmac);
/* Clears the pending work queue items, stops all scans, etc. */
-void
+void
ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm)
{
unsigned long flags;
struct ieee80211softmac_event *eventptr, *eventtmp;
struct ieee80211softmac_auth_queue_item *authptr, *authtmp;
struct ieee80211softmac_network *netptr, *nettmp;
-
+
ieee80211softmac_stop_scan(sm);
ieee80211softmac_wait_for_scan(sm);
-
+
spin_lock_irqsave(&sm->lock, flags);
+ sm->running = 0;
+
/* Free all pending assoc work items */
cancel_delayed_work(&sm->associnfo.work);
-
+
/* Free all pending scan work items */
if(sm->scaninfo != NULL)
- cancel_delayed_work(&sm->scaninfo->softmac_scan);
-
+ cancel_delayed_work(&sm->scaninfo->softmac_scan);
+
/* Free all pending auth work items */
list_for_each_entry(authptr, &sm->auth_queue, list)
cancel_delayed_work(&authptr->work);
-
+
/* delete all pending event calls and work items */
list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list)
cancel_delayed_work(&eventptr->work);
spin_unlock_irqrestore(&sm->lock, flags);
- flush_scheduled_work();
+ flush_workqueue(sm->wq);
- // now we should be save and no longer need locking...
+ /* now we should be save and no longer need locking... */
spin_lock_irqsave(&sm->lock, flags);
/* Free all pending auth work items */
list_for_each_entry_safe(authptr, authtmp, &sm->auth_queue, list) {
list_del(&authptr->list);
kfree(authptr);
}
-
+
/* delete all pending event calls and work items */
list_for_each_entry_safe(eventptr, eventtmp, &sm->events, list) {
list_del(&eventptr->list);
kfree(eventptr);
}
-
+
/* Free all networks */
list_for_each_entry_safe(netptr, nettmp, &sm->network_list, list) {
ieee80211softmac_del_network_locked(sm, netptr);
spin_unlock_irqrestore(&sm->lock, flags);
}
+EXPORT_SYMBOL_GPL(ieee80211softmac_clear_pending_work);
void free_ieee80211softmac(struct net_device *dev)
{
struct ieee80211softmac_device *sm = ieee80211_priv(dev);
- ieee80211softmac_clear_pending_work(sm);
+ ieee80211softmac_clear_pending_work(sm);
kfree(sm->scaninfo);
kfree(sm->wpa.IE);
+ destroy_workqueue(sm->wq);
free_ieee80211(dev);
}
+EXPORT_SYMBOL_GPL(free_ieee80211softmac);
static void ieee80211softmac_start_check_rates(struct ieee80211softmac_device *mac)
{
}
}
-void ieee80211softmac_start(struct net_device *dev)
+int ieee80211softmac_ratesinfo_rate_supported(struct ieee80211softmac_ratesinfo *ri, u8 rate)
{
- struct ieee80211softmac_device *mac = ieee80211_priv(dev);
- struct ieee80211_device *ieee = mac->ieee;
+ int search;
+ u8 search_rate;
+
+ for (search = 0; search < ri->count; search++) {
+ search_rate = ri->rates[search];
+ search_rate &= ~IEEE80211_BASIC_RATE_MASK;
+ if (rate == search_rate)
+ return 1;
+ }
+
+ return 0;
+}
+
+u8 ieee80211softmac_highest_supported_rate(struct ieee80211softmac_device *mac,
+ struct ieee80211softmac_ratesinfo *ri, int basic_only)
+{
+ u8 user_rate = mac->txrates.user_rate;
+ int i;
+
+ if (ri->count == 0)
+ return IEEE80211_CCK_RATE_1MB;
+
+ for (i = ri->count - 1; i >= 0; i--) {
+ u8 rate = ri->rates[i];
+ if (basic_only && !(rate & IEEE80211_BASIC_RATE_MASK))
+ continue;
+ rate &= ~IEEE80211_BASIC_RATE_MASK;
+ if (rate > user_rate)
+ continue;
+ if (ieee80211softmac_ratesinfo_rate_supported(&mac->ratesinfo, rate))
+ return rate;
+ }
+
+ /* If we haven't found a suitable rate by now, just trust the user */
+ return user_rate;
+}
+EXPORT_SYMBOL_GPL(ieee80211softmac_highest_supported_rate);
+
+void ieee80211softmac_process_erp(struct ieee80211softmac_device *mac,
+ u8 erp_value)
+{
+ int use_protection;
+ int short_preamble;
+ u32 changes = 0;
+
+ /* Barker preamble mode */
+ short_preamble = ((erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0
+ && mac->associnfo.short_preamble_available) ? 1 : 0;
+
+ /* Protection needed? */
+ use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
+
+ if (mac->bssinfo.short_preamble != short_preamble) {
+ changes |= IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE;
+ mac->bssinfo.short_preamble = short_preamble;
+ }
+
+ if (mac->bssinfo.use_protection != use_protection) {
+ changes |= IEEE80211SOFTMAC_BSSINFOCHG_PROTECTION;
+ mac->bssinfo.use_protection = use_protection;
+ }
+
+ if (mac->bssinfo_change && changes)
+ mac->bssinfo_change(mac->dev, changes);
+}
+
+void ieee80211softmac_recalc_txrates(struct ieee80211softmac_device *mac)
+{
+ struct ieee80211softmac_txrates *txrates = &mac->txrates;
u32 change = 0;
- struct ieee80211softmac_txrates oldrates;
- ieee80211softmac_start_check_rates(mac);
+ change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
+ txrates->default_rate = ieee80211softmac_highest_supported_rate(mac, &mac->bssinfo.supported_rates, 0);
+
+ change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+ txrates->default_fallback = lower_rate(mac, txrates->default_rate);
+
+ change |= IEEE80211SOFTMAC_TXRATECHG_MCAST;
+ txrates->mcast_rate = ieee80211softmac_highest_supported_rate(mac, &mac->bssinfo.supported_rates, 1);
+
+ if (mac->txrates_change)
+ mac->txrates_change(mac->dev, change);
+
+}
+
+void ieee80211softmac_init_bss(struct ieee80211softmac_device *mac)
+{
+ struct ieee80211_device *ieee = mac->ieee;
+ u32 change = 0;
+ struct ieee80211softmac_txrates *txrates = &mac->txrates;
+ struct ieee80211softmac_bss_info *bssinfo = &mac->bssinfo;
/* TODO: We need some kind of state machine to lower the default rates
* if we loose too many packets.
/* Change the default txrate to the highest possible value.
* The txrate machine will lower it, if it is too high.
*/
+ if (ieee->modulation & IEEE80211_OFDM_MODULATION)
+ txrates->user_rate = IEEE80211_OFDM_RATE_24MB;
+ else
+ txrates->user_rate = IEEE80211_CCK_RATE_11MB;
+
+ txrates->default_rate = IEEE80211_CCK_RATE_1MB;
+ change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
+
+ txrates->default_fallback = IEEE80211_CCK_RATE_1MB;
+ change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+
+ txrates->mcast_rate = IEEE80211_CCK_RATE_1MB;
+ change |= IEEE80211SOFTMAC_TXRATECHG_MCAST;
+
+ txrates->mgt_mcast_rate = IEEE80211_CCK_RATE_1MB;
+ change |= IEEE80211SOFTMAC_TXRATECHG_MGT_MCAST;
+
if (mac->txrates_change)
- oldrates = mac->txrates;
- if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
- mac->txrates.default_rate = IEEE80211_OFDM_RATE_54MB;
- change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
- mac->txrates.default_fallback = IEEE80211_OFDM_RATE_24MB;
- change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
- } else if (ieee->modulation & IEEE80211_CCK_MODULATION) {
- mac->txrates.default_rate = IEEE80211_CCK_RATE_11MB;
- change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
- mac->txrates.default_fallback = IEEE80211_CCK_RATE_5MB;
- change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
- } else
- assert(0);
- if (mac->txrates_change)
- mac->txrates_change(dev, change, &oldrates);
+ mac->txrates_change(mac->dev, change);
+
+ change = 0;
+
+ bssinfo->supported_rates.count = 0;
+ memset(bssinfo->supported_rates.rates, 0,
+ sizeof(bssinfo->supported_rates.rates));
+ change |= IEEE80211SOFTMAC_BSSINFOCHG_RATES;
+
+ bssinfo->short_preamble = 0;
+ change |= IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE;
+
+ bssinfo->use_protection = 0;
+ change |= IEEE80211SOFTMAC_BSSINFOCHG_PROTECTION;
+
+ if (mac->bssinfo_change)
+ mac->bssinfo_change(mac->dev, change);
+
+ mac->running = 1;
+}
+
+void ieee80211softmac_start(struct net_device *dev)
+{
+ struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+
+ ieee80211softmac_start_check_rates(mac);
+ ieee80211softmac_init_bss(mac);
}
+EXPORT_SYMBOL_GPL(ieee80211softmac_start);
void ieee80211softmac_stop(struct net_device *dev)
{
ieee80211softmac_clear_pending_work(mac);
}
+EXPORT_SYMBOL_GPL(ieee80211softmac_stop);
void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
unsigned long flags;
-
+
spin_lock_irqsave(&mac->lock, flags);
memcpy(mac->ratesinfo.rates, rates, count);
mac->ratesinfo.count = count;
spin_unlock_irqrestore(&mac->lock, flags);
}
+EXPORT_SYMBOL_GPL(ieee80211softmac_set_rates);
static u8 raise_rate(struct ieee80211softmac_device *mac, u8 rate)
{
int i;
struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo;
-
+
for (i=0; i<ri->count-1; i++) {
if (ri->rates[i] == rate)
return ri->rates[i+1];
{
int i;
struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo;
-
+
for (i=delta; i<ri->count; i++) {
if (ri->rates[i] == rate)
return ri->rates[i-delta];
static void ieee80211softmac_add_txrates_badness(struct ieee80211softmac_device *mac,
int amount)
{
- struct ieee80211softmac_txrates oldrates;
u8 default_rate = mac->txrates.default_rate;
u8 default_fallback = mac->txrates.default_fallback;
u32 changes = 0;
mac->txrate_badness += amount;
if (mac->txrate_badness <= -1000) {
/* Very small badness. Try a faster bitrate. */
- if (mac->txrates_change)
- memcpy(&oldrates, &mac->txrates, sizeof(oldrates));
default_rate = raise_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
default_fallback = get_fallback_rate(mac, default_rate);
printk("Bitrate raised to %u\n", default_rate);
} else if (mac->txrate_badness >= 10000) {
/* Very high badness. Try a slower bitrate. */
- if (mac->txrates_change)
- memcpy(&oldrates, &mac->txrates, sizeof(oldrates));
default_rate = lower_rate(mac, default_rate);
changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
default_fallback = get_fallback_rate(mac, default_rate);
mac->txrates.default_fallback = default_fallback;
if (changes && mac->txrates_change)
- mac->txrates_change(mac->dev, changes, &oldrates);
+ mac->txrates_change(mac->dev, changes);
}
void ieee80211softmac_fragment_lost(struct net_device *dev,
spin_unlock_irqrestore(&mac->lock, flags);
}
+EXPORT_SYMBOL_GPL(ieee80211softmac_fragment_lost);
static int rate_cmp(const void *a_, const void *b_) {
u8 *a, *b;
softnet->channel = net->channel;
softnet->essid.len = net->ssid_len;
memcpy(softnet->essid.data, net->ssid, softnet->essid.len);
-
+
/* copy rates over */
softnet->supported_rates.count = net->rates_len;
memcpy(&softnet->supported_rates.rates[0], net->rates, net->rates_len);
memcpy(&softnet->supported_rates.rates[softnet->supported_rates.count], net->rates_ex, net->rates_ex_len);
softnet->supported_rates.count += net->rates_ex_len;
sort(softnet->supported_rates.rates, softnet->supported_rates.count, sizeof(softnet->supported_rates.rates[0]), rate_cmp, NULL);
-
+
+ /* we save the ERP value because it is needed at association time, and
+ * many AP's do not include an ERP IE in the association response. */
+ softnet->erp_value = net->erp_value;
+
softnet->capabilities = net->capability;
return softnet;
}
ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_network *add_net)
{
- struct list_head *list_ptr;
- struct ieee80211softmac_network *softmac_net = NULL;
+ struct ieee80211softmac_network *softmac_net;
- list_for_each(list_ptr, &mac->network_list) {
- softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
+ list_for_each_entry(softmac_net, &mac->network_list, list) {
if(!memcmp(softmac_net->bssid, add_net->bssid, ETH_ALEN))
- break;
- else
- softmac_net = NULL;
+ return;
}
- if(softmac_net == NULL)
- list_add(&(add_net->list), &mac->network_list);
+ list_add(&(add_net->list), &mac->network_list);
}
/* Add a network to the list, with locking */
ieee80211softmac_get_network_by_bssid_locked(struct ieee80211softmac_device *mac,
u8 *bssid)
{
- struct list_head *list_ptr;
- struct ieee80211softmac_network *softmac_net = NULL;
- list_for_each(list_ptr, &mac->network_list) {
- softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
+ struct ieee80211softmac_network *softmac_net;
+
+ list_for_each_entry(softmac_net, &mac->network_list, list) {
if(!memcmp(softmac_net->bssid, bssid, ETH_ALEN))
- break;
- else
- softmac_net = NULL;
+ return softmac_net;
}
- return softmac_net;
+ return NULL;
}
/* Get a network from the list by BSSID with locking */
{
unsigned long flags;
struct ieee80211softmac_network *softmac_net;
-
+
spin_lock_irqsave(&mac->lock, flags);
softmac_net = ieee80211softmac_get_network_by_bssid_locked(mac, bssid);
spin_unlock_irqrestore(&mac->lock, flags);
ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac,
struct ieee80211softmac_essid *essid)
{
- struct list_head *list_ptr;
- struct ieee80211softmac_network *softmac_net = NULL;
+ struct ieee80211softmac_network *softmac_net;
- list_for_each(list_ptr, &mac->network_list) {
- softmac_net = list_entry(list_ptr, struct ieee80211softmac_network, list);
+ list_for_each_entry(softmac_net, &mac->network_list, list) {
if (softmac_net->essid.len == essid->len &&
!memcmp(softmac_net->essid.data, essid->data, essid->len))
return softmac_net;
/* Get a network from the list by ESSID with locking */
struct ieee80211softmac_network *
ieee80211softmac_get_network_by_essid(struct ieee80211softmac_device *mac,
- struct ieee80211softmac_essid *essid)
+ struct ieee80211softmac_essid *essid)
{
unsigned long flags;
struct ieee80211softmac_network *softmac_net = NULL;
spin_lock_irqsave(&mac->lock, flags);
- softmac_net = ieee80211softmac_get_network_by_essid_locked(mac, essid);
+ softmac_net = ieee80211softmac_get_network_by_essid_locked(mac, essid);
spin_unlock_irqrestore(&mac->lock, flags);
return softmac_net;
}
MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL_GPL(alloc_ieee80211softmac);
-EXPORT_SYMBOL_GPL(free_ieee80211softmac);
-EXPORT_SYMBOL_GPL(ieee80211softmac_set_rates);
-EXPORT_SYMBOL_GPL(ieee80211softmac_start);
-EXPORT_SYMBOL_GPL(ieee80211softmac_stop);
-EXPORT_SYMBOL_GPL(ieee80211softmac_fragment_lost);
-EXPORT_SYMBOL_GPL(ieee80211softmac_clear_pending_work);
+MODULE_AUTHOR("Johannes Berg");
+MODULE_AUTHOR("Joseph Jezak");
+MODULE_AUTHOR("Larry Finger");
+MODULE_AUTHOR("Danny van Dyk");
+MODULE_AUTHOR("Michael Buesch");
+MODULE_DESCRIPTION("802.11 software MAC");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff