diff options
author | Felix Fietkau <nbd@openwrt.org> | 2007-05-26 16:35:32 +0000 |
---|---|---|
committer | Felix Fietkau <nbd@openwrt.org> | 2007-05-26 16:35:32 +0000 |
commit | 0016ac20053ff8675fb038f82a7803ba1bcb162d (patch) | |
tree | 37904d2ef3fd56ce27f30690fd82ffaeda84edab /package/d80211/src/sta_info.c | |
parent | ec69f770037648285896608c2788d8f14c6cc0ae (diff) | |
download | master-31e0f0ae-0016ac20053ff8675fb038f82a7803ba1bcb162d.tar.gz master-31e0f0ae-0016ac20053ff8675fb038f82a7803ba1bcb162d.tar.bz2 master-31e0f0ae-0016ac20053ff8675fb038f82a7803ba1bcb162d.zip |
nuke the old d80211 backport - will be replaced soon
SVN-Revision: 7340
Diffstat (limited to 'package/d80211/src/sta_info.c')
-rw-r--r-- | package/d80211/src/sta_info.c | 461 |
1 files changed, 0 insertions, 461 deletions
diff --git a/package/d80211/src/sta_info.c b/package/d80211/src/sta_info.c deleted file mode 100644 index e8f2bab3ff..0000000000 --- a/package/d80211/src/sta_info.c +++ /dev/null @@ -1,461 +0,0 @@ -/* - * Copyright 2002-2005, Instant802 Networks, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/kobject.h> -#include <linux/netdevice.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/if_arp.h> - -#include <net/d80211.h> -#include "ieee80211_i.h" -#include "ieee80211_rate.h" -#include "sta_info.h" - - -/* Caller must hold local->sta_lock */ -static void sta_info_hash_add(struct ieee80211_local *local, - struct sta_info *sta) -{ - sta->hnext = local->sta_hash[STA_HASH(sta->addr)]; - local->sta_hash[STA_HASH(sta->addr)] = sta; -} - - -/* Caller must hold local->sta_lock */ -static void sta_info_hash_del(struct ieee80211_local *local, - struct sta_info *sta) -{ - struct sta_info *s; - - s = local->sta_hash[STA_HASH(sta->addr)]; - if (!s) - return; - if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) { - local->sta_hash[STA_HASH(sta->addr)] = s->hnext; - return; - } - - while (s->hnext && memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0) - s = s->hnext; - if (s->hnext) - s->hnext = s->hnext->hnext; - else - printk(KERN_ERR "%s: could not remove STA " MAC_FMT " from " - "hash table\n", local->mdev->name, MAC_ARG(sta->addr)); -} - -static inline struct sta_info *__sta_info_get(struct sta_info *sta) -{ - return kobject_get(&sta->kobj) ? sta : NULL; -} - -struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr) -{ - struct sta_info *sta; - - spin_lock_bh(&local->sta_lock); - sta = local->sta_hash[STA_HASH(addr)]; - while (sta) { - if (memcmp(sta->addr, addr, ETH_ALEN) == 0) { - __sta_info_get(sta); - break; - } - sta = sta->hnext; - } - spin_unlock_bh(&local->sta_lock); - - return sta; -} -EXPORT_SYMBOL(sta_info_get); - -int sta_info_min_txrate_get(struct ieee80211_local *local) -{ - struct sta_info *sta; - int min_txrate = 9999999; - int i; - - spin_lock_bh(&local->sta_lock); - for (i = 0; i < STA_HASH_SIZE; i++) { - sta = local->sta_hash[i]; - while (sta) { - if (sta->txrate < min_txrate) - min_txrate = sta->txrate; - sta = sta->hnext; - } - } - spin_unlock_bh(&local->sta_lock); - if (min_txrate == 9999999) - min_txrate = 0; - - return min_txrate; -} - - -void sta_info_put(struct sta_info *sta) -{ - kobject_put(&sta->kobj); -} -EXPORT_SYMBOL(sta_info_put); - -void sta_info_release(struct kobject *kobj) -{ - struct sta_info *sta = container_of(kobj, struct sta_info, kobj); - struct ieee80211_local *local = sta->local; - struct sk_buff *skb; - - /* free sta structure; it has already been removed from - * hash table etc. external structures. Make sure that all - * buffered frames are release (one might have been added - * after sta_info_free() was called). */ - while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { - local->total_ps_buffered--; - dev_kfree_skb_any(skb); - } - while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { - dev_kfree_skb_any(skb); - } - rate_control_free_sta(sta->rate_ctrl, sta->rate_ctrl_priv); - rate_control_put(sta->rate_ctrl); - kfree(sta); -} - - -struct sta_info * sta_info_add(struct ieee80211_local *local, - struct net_device *dev, u8 *addr, gfp_t gfp) -{ - struct sta_info *sta; - - sta = kzalloc(sizeof(*sta), gfp); - if (!sta) - return NULL; - - if (kobject_set_name(&sta->kobj, MAC_FMT, MAC_ARG(addr))) { - kfree(sta); - return NULL; - } - sta->kobj.kset = &local->sta_kset; - kobject_init(&sta->kobj); - - sta->rate_ctrl = rate_control_get(local->rate_ctrl); - sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, gfp); - if (!sta->rate_ctrl_priv) { - rate_control_put(sta->rate_ctrl); - kobject_put(&sta->kobj); - kfree(sta); - return NULL; - } - - memcpy(sta->addr, addr, ETH_ALEN); - sta->local = local; - sta->dev = dev; - skb_queue_head_init(&sta->ps_tx_buf); - skb_queue_head_init(&sta->tx_filtered); - __sta_info_get(sta); /* sta used by caller, decremented by - * sta_info_put() */ - spin_lock_bh(&local->sta_lock); - list_add(&sta->list, &local->sta_list); - local->num_sta++; - sta_info_hash_add(local, sta); - spin_unlock_bh(&local->sta_lock); - if (local->ops->sta_table_notification) - local->ops->sta_table_notification(local_to_hw(local), - local->num_sta); - sta->key_idx_compression = HW_KEY_IDX_INVALID; - -#ifdef CONFIG_D80211_VERBOSE_DEBUG - printk(KERN_DEBUG "%s: Added STA " MAC_FMT "\n", - local->mdev->name, MAC_ARG(addr)); -#endif /* CONFIG_D80211_VERBOSE_DEBUG */ - - if (!in_interrupt()) { - sta->sysfs_registered = 1; - ieee80211_sta_sysfs_add(sta); - rate_control_add_sta_attrs(sta, &sta->kobj); - } else { - /* procfs entry adding might sleep, so schedule process context - * task for adding proc entry for STAs that do not yet have - * one. */ - schedule_work(&local->sta_proc_add); - } - - return sta; -} - -static void finish_sta_info_free(struct ieee80211_local *local, - struct sta_info *sta) -{ -#ifdef CONFIG_D80211_VERBOSE_DEBUG - printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n", - local->mdev->name, MAC_ARG(sta->addr)); -#endif /* CONFIG_D80211_VERBOSE_DEBUG */ - - if (sta->key) { - ieee80211_key_sysfs_remove(sta->key); - ieee80211_key_free(sta->key); - sta->key = NULL; - } - - rate_control_remove_sta_attrs(sta, &sta->kobj); - ieee80211_sta_sysfs_remove(sta); - - sta_info_put(sta); -} - -void sta_info_free(struct sta_info *sta, int locked) -{ - struct sk_buff *skb; - struct ieee80211_local *local = sta->local; - struct ieee80211_sub_if_data *sdata; - - if (!locked) - spin_lock_bh(&local->sta_lock); - sta_info_hash_del(local, sta); - list_del(&sta->list); - sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); - if (sta->flags & WLAN_STA_PS) { - sta->flags &= ~WLAN_STA_PS; - if (sdata->bss) - atomic_dec(&sdata->bss->num_sta_ps); - } - local->num_sta--; - sta_info_remove_aid_ptr(sta); - if (!locked) - spin_unlock_bh(&local->sta_lock); - if (local->ops->sta_table_notification) - local->ops->sta_table_notification(local_to_hw(local), - local->num_sta); - - while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { - local->total_ps_buffered--; - dev_kfree_skb_any(skb); - } - while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { - dev_kfree_skb_any(skb); - } - - if (sta->key) { - if (local->ops->set_key) { - struct ieee80211_key_conf *key; - key = ieee80211_key_data2conf(local, sta->key); - if (key) { - local->ops->set_key(local_to_hw(local), - DISABLE_KEY, - sta->addr, key, sta->aid); - kfree(key); - } - } - } else if (sta->key_idx_compression != HW_KEY_IDX_INVALID) { - struct ieee80211_key_conf conf; - memset(&conf, 0, sizeof(conf)); - conf.hw_key_idx = sta->key_idx_compression; - conf.alg = ALG_NULL; - conf.flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; - local->ops->set_key(local_to_hw(local), DISABLE_KEY, - sta->addr, &conf, sta->aid); - sta->key_idx_compression = HW_KEY_IDX_INVALID; - } - - if (in_atomic()) { - list_add(&sta->list, &local->deleted_sta_list); - schedule_work(&local->sta_proc_add); - } else - finish_sta_info_free(local, sta); -} - - -static inline int sta_info_buffer_expired(struct ieee80211_local *local, - struct sta_info *sta, - struct sk_buff *skb) -{ - struct ieee80211_tx_packet_data *pkt_data; - int timeout; - - if (!skb) - return 0; - - pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; - - /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ - timeout = (sta->listen_interval * local->hw.conf.beacon_int * 32 / - 15625) * HZ; - if (timeout < STA_TX_BUFFER_EXPIRE) - timeout = STA_TX_BUFFER_EXPIRE; - return time_after(jiffies, pkt_data->jiffies + timeout); -} - - -static void sta_info_cleanup_expire_buffered(struct ieee80211_local *local, - struct sta_info *sta) -{ - unsigned long flags; - struct sk_buff *skb; - - if (skb_queue_empty(&sta->ps_tx_buf)) - return; - - for (;;) { - spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); - skb = skb_peek(&sta->ps_tx_buf); - if (sta_info_buffer_expired(local, sta, skb)) { - skb = __skb_dequeue(&sta->ps_tx_buf); - if (skb_queue_empty(&sta->ps_tx_buf)) - sta->flags &= ~WLAN_STA_TIM; - } else - skb = NULL; - spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); - - if (skb) { - local->total_ps_buffered--; - printk(KERN_DEBUG "Buffered frame expired (STA " - MAC_FMT ")\n", MAC_ARG(sta->addr)); - dev_kfree_skb(skb); - } else - break; - } -} - - -static void sta_info_cleanup(unsigned long data) -{ - struct ieee80211_local *local = (struct ieee80211_local *) data; - struct sta_info *sta; - - spin_lock_bh(&local->sta_lock); - list_for_each_entry(sta, &local->sta_list, list) { - __sta_info_get(sta); - sta_info_cleanup_expire_buffered(local, sta); - sta_info_put(sta); - } - spin_unlock_bh(&local->sta_lock); - - local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL; - add_timer(&local->sta_cleanup); -} - - -static void sta_info_proc_add_task(struct work_struct *work) -{ - struct ieee80211_local *local = - container_of(work, struct ieee80211_local, sta_proc_add); - struct sta_info *sta, *tmp; - - while (1) { - spin_lock_bh(&local->sta_lock); - if (!list_empty(&local->deleted_sta_list)) { - sta = list_entry(local->deleted_sta_list.next, - struct sta_info, list); - list_del(local->deleted_sta_list.next); - } else - sta = NULL; - spin_unlock_bh(&local->sta_lock); - if (!sta) - break; - finish_sta_info_free(local, sta); - } - - while (1) { - sta = NULL; - spin_lock_bh(&local->sta_lock); - list_for_each_entry(tmp, &local->sta_list, list) { - if (!tmp->sysfs_registered) { - sta = tmp; - __sta_info_get(sta); - break; - } - } - spin_unlock_bh(&local->sta_lock); - - if (!sta) - break; - - sta->sysfs_registered = 1; - ieee80211_sta_sysfs_add(sta); - rate_control_add_sta_attrs(sta, &sta->kobj); - sta_info_put(sta); - } -} - - -void sta_info_init(struct ieee80211_local *local) -{ - spin_lock_init(&local->sta_lock); - INIT_LIST_HEAD(&local->sta_list); - INIT_LIST_HEAD(&local->deleted_sta_list); - - init_timer(&local->sta_cleanup); - local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL; - local->sta_cleanup.data = (unsigned long) local; - local->sta_cleanup.function = sta_info_cleanup; - - INIT_WORK(&local->sta_proc_add, sta_info_proc_add_task); -} - -int sta_info_start(struct ieee80211_local *local) -{ - int res; - - res = ieee80211_sta_kset_sysfs_register(local); - if (res) - return res; - add_timer(&local->sta_cleanup); - return 0; -} - -void sta_info_stop(struct ieee80211_local *local) -{ - struct sta_info *sta, *tmp; - - del_timer(&local->sta_cleanup); - - list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { - /* sta_info_free must be called with 0 as the last - * parameter to ensure all sysfs sta entries are - * unregistered. We don't need locking at this - * point. */ - sta_info_free(sta, 0); - } - ieee80211_sta_kset_sysfs_unregister(local); -} - - -void sta_info_remove_aid_ptr(struct sta_info *sta) -{ - struct ieee80211_sub_if_data *sdata; - - if (sta->aid <= 0) - return; - - sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); - - if (sdata->local->ops->set_tim) - sdata->local->ops->set_tim(local_to_hw(sdata->local), - sta->aid, 0); - if (sdata->bss) - __bss_tim_clear(sdata->bss, sta->aid); -} - - -/** - * sta_info_flush - flush matching STA entries from the STA table - * @local: local interface data - * @dev: matching rule for the net device (sta->dev) or %NULL to match all STAs - */ -void sta_info_flush(struct ieee80211_local *local, struct net_device *dev) -{ - struct sta_info *sta, *tmp; - - spin_lock_bh(&local->sta_lock); - list_for_each_entry_safe(sta, tmp, &local->sta_list, list) - if (!dev || dev == sta->dev) - sta_info_free(sta, 1); - spin_unlock_bh(&local->sta_lock); -} |