diff options
Diffstat (limited to 'net/ieee80211/softmac/ieee80211softmac_module.c')
| -rw-r--r-- | net/ieee80211/softmac/ieee80211softmac_module.c | 568 |
1 files changed, 0 insertions, 568 deletions
diff --git a/net/ieee80211/softmac/ieee80211softmac_module.c b/net/ieee80211/softmac/ieee80211softmac_module.c deleted file mode 100644 index 07505ca859a..00000000000 --- a/net/ieee80211/softmac/ieee80211softmac_module.c +++ /dev/null @@ -1,568 +0,0 @@ -/* - * 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(*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->auth_queue); - INIT_LIST_HEAD(&softmac->network_list); - INIT_LIST_HEAD(&softmac->events); - - 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; - - /* to start with, we can't send anything ... */ - netif_carrier_off(dev); - - return dev; -} -EXPORT_SYMBOL_GPL(alloc_ieee80211softmac); - -/* Clears the pending work queue items, stops all scans, etc. */ -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); - - /* 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_workqueue(sm->wq); - - /* 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); - if(netptr->challenge != NULL) - kfree(netptr->challenge); - kfree(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); - 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) -{ - struct ieee80211softmac_ratesinfo *ri = &mac->ratesinfo; - /* I took out the sorting check, we're seperating by modulation now. */ - if (ri->count) - return; - /* otherwise assume we hav'em all! */ - if (mac->ieee->modulation & IEEE80211_CCK_MODULATION) { - ri->rates[ri->count++] = IEEE80211_CCK_RATE_1MB; - ri->rates[ri->count++] = IEEE80211_CCK_RATE_2MB; - ri->rates[ri->count++] = IEEE80211_CCK_RATE_5MB; - ri->rates[ri->count++] = IEEE80211_CCK_RATE_11MB; - } - if (mac->ieee->modulation & IEEE80211_OFDM_MODULATION) { - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_6MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_9MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_12MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_18MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_24MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_36MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_48MB; - ri->rates[ri->count++] = IEEE80211_OFDM_RATE_54MB; - } -} - -int ieee80211softmac_ratesinfo_rate_supported(struct ieee80211softmac_ratesinfo *ri, u8 rate) -{ - 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; - - 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) - 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) -{ - struct ieee80211softmac_device *mac = ieee80211_priv(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]; - } - /* I guess we can't go any higher... */ - return ri->rates[ri->count]; -} - -u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta) -{ - 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]; - } - /* I guess we can't go any lower... */ - return ri->rates[0]; -} - -static void ieee80211softmac_add_txrates_badness(struct ieee80211softmac_device *mac, - int amount) -{ - u8 default_rate = mac->txrates.default_rate; - u8 default_fallback = mac->txrates.default_fallback; - u32 changes = 0; - - //TODO: This is highly experimental code. - // Maybe the dynamic rate selection does not work - // and it has to be removed again. - -printk("badness %d\n", mac->txrate_badness); - mac->txrate_badness += amount; - if (mac->txrate_badness <= -1000) { - /* Very small badness. Try a faster bitrate. */ - default_rate = raise_rate(mac, default_rate); - changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; - default_fallback = get_fallback_rate(mac, default_rate); - changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; - mac->txrate_badness = 0; -printk("Bitrate raised to %u\n", default_rate); - } else if (mac->txrate_badness >= 10000) { - /* Very high badness. Try a slower bitrate. */ - default_rate = lower_rate(mac, default_rate); - changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT; - default_fallback = get_fallback_rate(mac, default_rate); - changes |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK; - mac->txrate_badness = 0; -printk("Bitrate lowered to %u\n", default_rate); - } - - mac->txrates.default_rate = default_rate; - mac->txrates.default_fallback = default_fallback; - - if (changes && mac->txrates_change) - mac->txrates_change(mac->dev, changes); -} - -void ieee80211softmac_fragment_lost(struct net_device *dev, - u16 wl_seq) -{ - struct ieee80211softmac_device *mac = ieee80211_priv(dev); - unsigned long flags; - - spin_lock_irqsave(&mac->lock, flags); - ieee80211softmac_add_txrates_badness(mac, 1000); - //TODO - - 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; - a = (u8*)a_; - b = (u8*)b_; - return ((*a & ~IEEE80211_BASIC_RATE_MASK) - (*b & ~IEEE80211_BASIC_RATE_MASK)); -} - -/* Allocate a softmac network struct and fill it from a network */ -struct ieee80211softmac_network * -ieee80211softmac_create_network(struct ieee80211softmac_device *mac, - struct ieee80211_network *net) -{ - struct ieee80211softmac_network *softnet; - softnet = kzalloc(sizeof(struct ieee80211softmac_network), GFP_ATOMIC); - if(softnet == NULL) - return NULL; - memcpy(softnet->bssid, net->bssid, ETH_ALEN); - 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; -} - - -/* Add a network to the list, while locked */ -void -ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac, - struct ieee80211softmac_network *add_net) -{ - struct ieee80211softmac_network *softmac_net; - - list_for_each_entry(softmac_net, &mac->network_list, list) { - if(!memcmp(softmac_net->bssid, add_net->bssid, ETH_ALEN)) - return; - } - list_add(&(add_net->list), &mac->network_list); -} - -/* Add a network to the list, with locking */ -void -ieee80211softmac_add_network(struct ieee80211softmac_device *mac, - struct ieee80211softmac_network *add_net) -{ - unsigned long flags; - spin_lock_irqsave(&mac->lock, flags); - ieee80211softmac_add_network_locked(mac, add_net); - spin_unlock_irqrestore(&mac->lock, flags); -} - - -/* Delete a network from the list, while locked*/ -void -ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac, - struct ieee80211softmac_network *del_net) -{ - list_del(&(del_net->list)); -} - -/* Delete a network from the list with locking */ -void -ieee80211softmac_del_network(struct ieee80211softmac_device *mac, - struct ieee80211softmac_network *del_net) -{ - unsigned long flags; - spin_lock_irqsave(&mac->lock, flags); - ieee80211softmac_del_network_locked(mac, del_net); - spin_unlock_irqrestore(&mac->lock, flags); -} - -/* Get a network from the list by MAC while locked */ -struct ieee80211softmac_network * -ieee80211softmac_get_network_by_bssid_locked(struct ieee80211softmac_device *mac, - u8 *bssid) -{ - struct ieee80211softmac_network *softmac_net; - - list_for_each_entry(softmac_net, &mac->network_list, list) { - if(!memcmp(softmac_net->bssid, bssid, ETH_ALEN)) - return softmac_net; - } - return NULL; -} - -/* Get a network from the list by BSSID with locking */ -struct ieee80211softmac_network * -ieee80211softmac_get_network_by_bssid(struct ieee80211softmac_device *mac, - u8 *bssid) -{ - 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); - return softmac_net; -} - -/* Get a network from the list by ESSID while locked */ -struct ieee80211softmac_network * -ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac, - struct ieee80211softmac_essid *essid) -{ - struct ieee80211softmac_network *softmac_net; - - 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; - } - return NULL; -} - -/* 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) -{ - 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); - spin_unlock_irqrestore(&mac->lock, flags); - return softmac_net; -} - -MODULE_LICENSE("GPL"); -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"); |