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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [net/] [mac80211/] [ieee80211.c] - Blame information for rev 17

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/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
 *
 * 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 <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/rtnetlink.h>
#include <linux/bitmap.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
 
#include "ieee80211_i.h"
#include "ieee80211_rate.h"
#include "wep.h"
#include "wme.h"
#include "aes_ccm.h"
#include "ieee80211_led.h"
#include "cfg.h"
#include "debugfs.h"
#include "debugfs_netdev.h"
 
/*
 * For seeing transmitted packets on monitor interfaces
 * we have a radiotap header too.
 */
struct ieee80211_tx_status_rtap_hdr {
        struct ieee80211_radiotap_header hdr;
        __le16 tx_flags;
        u8 data_retries;
} __attribute__ ((packed));
 
/* common interface routines */
 
static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
{
        memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
        return ETH_ALEN;
}
 
/* must be called under mdev tx lock */
static void ieee80211_configure_filter(struct ieee80211_local *local)
{
        unsigned int changed_flags;
        unsigned int new_flags = 0;
 
        if (atomic_read(&local->iff_promiscs))
                new_flags |= FIF_PROMISC_IN_BSS;
 
        if (atomic_read(&local->iff_allmultis))
                new_flags |= FIF_ALLMULTI;
 
        if (local->monitors)
                new_flags |= FIF_CONTROL |
                             FIF_OTHER_BSS |
                             FIF_BCN_PRBRESP_PROMISC;
 
        changed_flags = local->filter_flags ^ new_flags;
 
        /* be a bit nasty */
        new_flags |= (1<<31);
 
        local->ops->configure_filter(local_to_hw(local),
                                     changed_flags, &new_flags,
                                     local->mdev->mc_count,
                                     local->mdev->mc_list);
 
        WARN_ON(new_flags & (1<<31));
 
        local->filter_flags = new_flags & ~(1<<31);
}
 
/* master interface */
 
static int ieee80211_master_open(struct net_device *dev)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_sub_if_data *sdata;
        int res = -EOPNOTSUPP;
 
        /* we hold the RTNL here so can safely walk the list */
        list_for_each_entry(sdata, &local->interfaces, list) {
                if (sdata->dev != dev && netif_running(sdata->dev)) {
                        res = 0;
                        break;
                }
        }
        return res;
}
 
static int ieee80211_master_stop(struct net_device *dev)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_sub_if_data *sdata;
 
        /* we hold the RTNL here so can safely walk the list */
        list_for_each_entry(sdata, &local->interfaces, list)
                if (sdata->dev != dev && netif_running(sdata->dev))
                        dev_close(sdata->dev);
 
        return 0;
}
 
static void ieee80211_master_set_multicast_list(struct net_device *dev)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 
        ieee80211_configure_filter(local);
}
 
/* regular interfaces */
 
static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
{
        /* FIX: what would be proper limits for MTU?
         * This interface uses 802.3 frames. */
        if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
                printk(KERN_WARNING "%s: invalid MTU %d\n",
                       dev->name, new_mtu);
                return -EINVAL;
        }
 
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
        printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
        dev->mtu = new_mtu;
        return 0;
}
 
static inline int identical_mac_addr_allowed(int type1, int type2)
{
        return (type1 == IEEE80211_IF_TYPE_MNTR ||
                type2 == IEEE80211_IF_TYPE_MNTR ||
                (type1 == IEEE80211_IF_TYPE_AP &&
                 type2 == IEEE80211_IF_TYPE_WDS) ||
                (type1 == IEEE80211_IF_TYPE_WDS &&
                 (type2 == IEEE80211_IF_TYPE_WDS ||
                  type2 == IEEE80211_IF_TYPE_AP)) ||
                (type1 == IEEE80211_IF_TYPE_AP &&
                 type2 == IEEE80211_IF_TYPE_VLAN) ||
                (type1 == IEEE80211_IF_TYPE_VLAN &&
                 (type2 == IEEE80211_IF_TYPE_AP ||
                  type2 == IEEE80211_IF_TYPE_VLAN)));
}
 
static int ieee80211_open(struct net_device *dev)
{
        struct ieee80211_sub_if_data *sdata, *nsdata;
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_if_init_conf conf;
        int res;
 
        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
        /* we hold the RTNL here so can safely walk the list */
        list_for_each_entry(nsdata, &local->interfaces, list) {
                struct net_device *ndev = nsdata->dev;
 
                if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
                    compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
                        /*
                         * check whether it may have the same address
                         */
                        if (!identical_mac_addr_allowed(sdata->type,
                                                        nsdata->type))
                                return -ENOTUNIQ;
 
                        /*
                         * can only add VLANs to enabled APs
                         */
                        if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
                            nsdata->type == IEEE80211_IF_TYPE_AP &&
                            netif_running(nsdata->dev))
                                sdata->u.vlan.ap = nsdata;
                }
        }
 
        switch (sdata->type) {
        case IEEE80211_IF_TYPE_WDS:
                if (is_zero_ether_addr(sdata->u.wds.remote_addr))
                        return -ENOLINK;
                break;
        case IEEE80211_IF_TYPE_VLAN:
                if (!sdata->u.vlan.ap)
                        return -ENOLINK;
                break;
        case IEEE80211_IF_TYPE_AP:
        case IEEE80211_IF_TYPE_STA:
        case IEEE80211_IF_TYPE_MNTR:
        case IEEE80211_IF_TYPE_IBSS:
                /* no special treatment */
                break;
        case IEEE80211_IF_TYPE_INVALID:
                /* cannot happen */
                WARN_ON(1);
                break;
        }
 
        if (local->open_count == 0) {
                res = 0;
                if (local->ops->start)
                        res = local->ops->start(local_to_hw(local));
                if (res)
                        return res;
                ieee80211_hw_config(local);
        }
 
        switch (sdata->type) {
        case IEEE80211_IF_TYPE_VLAN:
                list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
                /* no need to tell driver */
                break;
        case IEEE80211_IF_TYPE_MNTR:
                /* must be before the call to ieee80211_configure_filter */
                local->monitors++;
                if (local->monitors == 1) {
                        netif_tx_lock_bh(local->mdev);
                        ieee80211_configure_filter(local);
                        netif_tx_unlock_bh(local->mdev);
 
                        local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
                }
                break;
        case IEEE80211_IF_TYPE_STA:
        case IEEE80211_IF_TYPE_IBSS:
                sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
                /* fall through */
        default:
                conf.if_id = dev->ifindex;
                conf.type = sdata->type;
                conf.mac_addr = dev->dev_addr;
                res = local->ops->add_interface(local_to_hw(local), &conf);
                if (res && !local->open_count && local->ops->stop)
                        local->ops->stop(local_to_hw(local));
                if (res)
                        return res;
 
                ieee80211_if_config(dev);
                ieee80211_reset_erp_info(dev);
                ieee80211_enable_keys(sdata);
 
                if (sdata->type == IEEE80211_IF_TYPE_STA &&
                    !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
                        netif_carrier_off(dev);
                else
                        netif_carrier_on(dev);
        }
 
        if (local->open_count == 0) {
                res = dev_open(local->mdev);
                WARN_ON(res);
                tasklet_enable(&local->tx_pending_tasklet);
                tasklet_enable(&local->tasklet);
        }
 
        /*
         * set_multicast_list will be invoked by the networking core
         * which will check whether any increments here were done in
         * error and sync them down to the hardware as filter flags.
         */
        if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
                atomic_inc(&local->iff_allmultis);
 
        if (sdata->flags & IEEE80211_SDATA_PROMISC)
                atomic_inc(&local->iff_promiscs);
 
        local->open_count++;
 
        netif_start_queue(dev);
 
        return 0;
}
 
static int ieee80211_stop(struct net_device *dev)
{
        struct ieee80211_sub_if_data *sdata;
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_if_init_conf conf;
 
        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
        netif_stop_queue(dev);
 
        /*
         * Don't count this interface for promisc/allmulti while it
         * is down. dev_mc_unsync() will invoke set_multicast_list
         * on the master interface which will sync these down to the
         * hardware as filter flags.
         */
        if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
                atomic_dec(&local->iff_allmultis);
 
        if (sdata->flags & IEEE80211_SDATA_PROMISC)
                atomic_dec(&local->iff_promiscs);
 
        dev_mc_unsync(local->mdev, dev);
 
        /* down all dependent devices, that is VLANs */
        if (sdata->type == IEEE80211_IF_TYPE_AP) {
                struct ieee80211_sub_if_data *vlan, *tmp;
 
                list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
                                         u.vlan.list)
                        dev_close(vlan->dev);
                WARN_ON(!list_empty(&sdata->u.ap.vlans));
        }
 
        local->open_count--;
 
        switch (sdata->type) {
        case IEEE80211_IF_TYPE_VLAN:
                list_del(&sdata->u.vlan.list);
                sdata->u.vlan.ap = NULL;
                /* no need to tell driver */
                break;
        case IEEE80211_IF_TYPE_MNTR:
                local->monitors--;
                if (local->monitors == 0) {
                        netif_tx_lock_bh(local->mdev);
                        ieee80211_configure_filter(local);
                        netif_tx_unlock_bh(local->mdev);
 
                        local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
                }
                break;
        case IEEE80211_IF_TYPE_STA:
        case IEEE80211_IF_TYPE_IBSS:
                sdata->u.sta.state = IEEE80211_DISABLED;
                del_timer_sync(&sdata->u.sta.timer);
                /*
                 * When we get here, the interface is marked down.
                 * Call synchronize_rcu() to wait for the RX path
                 * should it be using the interface and enqueuing
                 * frames at this very time on another CPU.
                 */
                synchronize_rcu();
                skb_queue_purge(&sdata->u.sta.skb_queue);
 
                if (!local->ops->hw_scan &&
                    local->scan_dev == sdata->dev) {
                        local->sta_scanning = 0;
                        cancel_delayed_work(&local->scan_work);
                }
                flush_workqueue(local->hw.workqueue);
 
                sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
                kfree(sdata->u.sta.extra_ie);
                sdata->u.sta.extra_ie = NULL;
                sdata->u.sta.extra_ie_len = 0;
                /* fall through */
        default:
                conf.if_id = dev->ifindex;
                conf.type = sdata->type;
                conf.mac_addr = dev->dev_addr;
                /* disable all keys for as long as this netdev is down */
                ieee80211_disable_keys(sdata);
                local->ops->remove_interface(local_to_hw(local), &conf);
        }
 
        if (local->open_count == 0) {
                if (netif_running(local->mdev))
                        dev_close(local->mdev);
 
                if (local->ops->stop)
                        local->ops->stop(local_to_hw(local));
 
                tasklet_disable(&local->tx_pending_tasklet);
                tasklet_disable(&local->tasklet);
        }
 
        return 0;
}
 
static void ieee80211_set_multicast_list(struct net_device *dev)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
        int allmulti, promisc, sdata_allmulti, sdata_promisc;
 
        allmulti = !!(dev->flags & IFF_ALLMULTI);
        promisc = !!(dev->flags & IFF_PROMISC);
        sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
        sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 
        if (allmulti != sdata_allmulti) {
                if (dev->flags & IFF_ALLMULTI)
                        atomic_inc(&local->iff_allmultis);
                else
                        atomic_dec(&local->iff_allmultis);
                sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
        }
 
        if (promisc != sdata_promisc) {
                if (dev->flags & IFF_PROMISC)
                        atomic_inc(&local->iff_promiscs);
                else
                        atomic_dec(&local->iff_promiscs);
                sdata->flags ^= IEEE80211_SDATA_PROMISC;
        }
 
        dev_mc_sync(local->mdev, dev);
}
 
static const struct header_ops ieee80211_header_ops = {
        .create         = eth_header,
        .parse          = header_parse_80211,
        .rebuild        = eth_rebuild_header,
        .cache          = eth_header_cache,
        .cache_update   = eth_header_cache_update,
};
 
/* Must not be called for mdev */
void ieee80211_if_setup(struct net_device *dev)
{
        ether_setup(dev);
        dev->hard_start_xmit = ieee80211_subif_start_xmit;
        dev->wireless_handlers = &ieee80211_iw_handler_def;
        dev->set_multicast_list = ieee80211_set_multicast_list;
        dev->change_mtu = ieee80211_change_mtu;
        dev->open = ieee80211_open;
        dev->stop = ieee80211_stop;
        dev->destructor = ieee80211_if_free;
}
 
/* WDS specialties */
 
int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
        struct sta_info *sta;
        DECLARE_MAC_BUF(mac);
 
        if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
                return 0;
 
        /* Create STA entry for the new peer */
        sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
        if (!sta)
                return -ENOMEM;
        sta_info_put(sta);
 
        /* Remove STA entry for the old peer */
        sta = sta_info_get(local, sdata->u.wds.remote_addr);
        if (sta) {
                sta_info_free(sta);
                sta_info_put(sta);
        } else {
                printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
                       "peer %s\n",
                       dev->name, print_mac(mac, sdata->u.wds.remote_addr));
        }
 
        /* Update WDS link data */
        memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 
        return 0;
}
 
/* everything else */
 
static int __ieee80211_if_config(struct net_device *dev,
                                 struct sk_buff *beacon,
                                 struct ieee80211_tx_control *control)
{
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_if_conf conf;
 
        if (!local->ops->config_interface || !netif_running(dev))
                return 0;
 
        memset(&conf, 0, sizeof(conf));
        conf.type = sdata->type;
        if (sdata->type == IEEE80211_IF_TYPE_STA ||
            sdata->type == IEEE80211_IF_TYPE_IBSS) {
                conf.bssid = sdata->u.sta.bssid;
                conf.ssid = sdata->u.sta.ssid;
                conf.ssid_len = sdata->u.sta.ssid_len;
        } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
                conf.ssid = sdata->u.ap.ssid;
                conf.ssid_len = sdata->u.ap.ssid_len;
                conf.beacon = beacon;
                conf.beacon_control = control;
        }
        return local->ops->config_interface(local_to_hw(local),
                                           dev->ifindex, &conf);
}
 
int ieee80211_if_config(struct net_device *dev)
{
        return __ieee80211_if_config(dev, NULL, NULL);
}
 
int ieee80211_if_config_beacon(struct net_device *dev)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_tx_control control;
        struct sk_buff *skb;
 
        if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
                return 0;
        skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
        if (!skb)
                return -ENOMEM;
        return __ieee80211_if_config(dev, skb, &control);
}
 
int ieee80211_hw_config(struct ieee80211_local *local)
{
        struct ieee80211_hw_mode *mode;
        struct ieee80211_channel *chan;
        int ret = 0;
 
        if (local->sta_scanning) {
                chan = local->scan_channel;
                mode = local->scan_hw_mode;
        } else {
                chan = local->oper_channel;
                mode = local->oper_hw_mode;
        }
 
        local->hw.conf.channel = chan->chan;
        local->hw.conf.channel_val = chan->val;
        if (!local->hw.conf.power_level) {
                local->hw.conf.power_level = chan->power_level;
        } else {
                local->hw.conf.power_level = min(chan->power_level,
                                                 local->hw.conf.power_level);
        }
        local->hw.conf.freq = chan->freq;
        local->hw.conf.phymode = mode->mode;
        local->hw.conf.antenna_max = chan->antenna_max;
        local->hw.conf.chan = chan;
        local->hw.conf.mode = mode;
 
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
        printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
               "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
               local->hw.conf.phymode);
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
        if (local->open_count)
                ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 
        return ret;
}
 
void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
{
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
        if (local->ops->erp_ie_changed)
                local->ops->erp_ie_changed(local_to_hw(local), changes,
                        !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
                        !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
}
 
void ieee80211_reset_erp_info(struct net_device *dev)
{
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
        sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
                        IEEE80211_SDATA_SHORT_PREAMBLE);
        ieee80211_erp_info_change_notify(dev,
                                         IEEE80211_ERP_CHANGE_PROTECTION |
                                         IEEE80211_ERP_CHANGE_PREAMBLE);
}
 
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
                                 struct sk_buff *skb,
                                 struct ieee80211_tx_status *status)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_tx_status *saved;
        int tmp;
 
        skb->dev = local->mdev;
        saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
        if (unlikely(!saved)) {
                if (net_ratelimit())
                        printk(KERN_WARNING "%s: Not enough memory, "
                               "dropping tx status", skb->dev->name);
                /* should be dev_kfree_skb_irq, but due to this function being
                 * named _irqsafe instead of just _irq we can't be sure that
                 * people won't call it from non-irq contexts */
                dev_kfree_skb_any(skb);
                return;
        }
        memcpy(saved, status, sizeof(struct ieee80211_tx_status));
        /* copy pointer to saved status into skb->cb for use by tasklet */
        memcpy(skb->cb, &saved, sizeof(saved));
 
        skb->pkt_type = IEEE80211_TX_STATUS_MSG;
        skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
                       &local->skb_queue : &local->skb_queue_unreliable, skb);
        tmp = skb_queue_len(&local->skb_queue) +
                skb_queue_len(&local->skb_queue_unreliable);
        while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
               (skb = skb_dequeue(&local->skb_queue_unreliable))) {
                memcpy(&saved, skb->cb, sizeof(saved));
                kfree(saved);
                dev_kfree_skb_irq(skb);
                tmp--;
                I802_DEBUG_INC(local->tx_status_drop);
        }
        tasklet_schedule(&local->tasklet);
}
EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 
static void ieee80211_tasklet_handler(unsigned long data)
{
        struct ieee80211_local *local = (struct ieee80211_local *) data;
        struct sk_buff *skb;
        struct ieee80211_rx_status rx_status;
        struct ieee80211_tx_status *tx_status;
 
        while ((skb = skb_dequeue(&local->skb_queue)) ||
               (skb = skb_dequeue(&local->skb_queue_unreliable))) {
                switch (skb->pkt_type) {
                case IEEE80211_RX_MSG:
                        /* status is in skb->cb */
                        memcpy(&rx_status, skb->cb, sizeof(rx_status));
                        /* Clear skb->type in order to not confuse kernel
                         * netstack. */
                        skb->pkt_type = 0;
                        __ieee80211_rx(local_to_hw(local), skb, &rx_status);
                        break;
                case IEEE80211_TX_STATUS_MSG:
                        /* get pointer to saved status out of skb->cb */
                        memcpy(&tx_status, skb->cb, sizeof(tx_status));
                        skb->pkt_type = 0;
                        ieee80211_tx_status(local_to_hw(local),
                                            skb, tx_status);
                        kfree(tx_status);
                        break;
                default: /* should never get here! */
                        printk(KERN_ERR "%s: Unknown message type (%d)\n",
                               wiphy_name(local->hw.wiphy), skb->pkt_type);
                        dev_kfree_skb(skb);
                        break;
                }
        }
}
 
/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 * make a prepared TX frame (one that has been given to hw) to look like brand
 * new IEEE 802.11 frame that is ready to go through TX processing again.
 * Also, tx_packet_data in cb is restored from tx_control. */
static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
                                      struct ieee80211_key *key,
                                      struct sk_buff *skb,
                                      struct ieee80211_tx_control *control)
{
        int hdrlen, iv_len, mic_len;
        struct ieee80211_tx_packet_data *pkt_data;
 
        pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
        pkt_data->ifindex = control->ifindex;
        pkt_data->flags = 0;
        if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
                pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
        if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
                pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
        if (control->flags & IEEE80211_TXCTL_REQUEUE)
                pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
        pkt_data->queue = control->queue;
 
        hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 
        if (!key)
                goto no_key;
 
        switch (key->conf.alg) {
        case ALG_WEP:
                iv_len = WEP_IV_LEN;
                mic_len = WEP_ICV_LEN;
                break;
        case ALG_TKIP:
                iv_len = TKIP_IV_LEN;
                mic_len = TKIP_ICV_LEN;
                break;
        case ALG_CCMP:
                iv_len = CCMP_HDR_LEN;
                mic_len = CCMP_MIC_LEN;
                break;
        default:
                goto no_key;
        }
 
        if (skb->len >= mic_len &&
            !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
                skb_trim(skb, skb->len - mic_len);
        if (skb->len >= iv_len && skb->len > hdrlen) {
                memmove(skb->data + iv_len, skb->data, hdrlen);
                skb_pull(skb, iv_len);
        }
 
no_key:
        {
                struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
                u16 fc = le16_to_cpu(hdr->frame_control);
                if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
                        fc &= ~IEEE80211_STYPE_QOS_DATA;
                        hdr->frame_control = cpu_to_le16(fc);
                        memmove(skb->data + 2, skb->data, hdrlen - 2);
                        skb_pull(skb, 2);
                }
        }
}
 
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
                         struct ieee80211_tx_status *status)
{
        struct sk_buff *skb2;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct ieee80211_local *local = hw_to_local(hw);
        u16 frag, type;
        struct ieee80211_tx_status_rtap_hdr *rthdr;
        struct ieee80211_sub_if_data *sdata;
        int monitors;
 
        if (!status) {
                printk(KERN_ERR
                       "%s: ieee80211_tx_status called with NULL status\n",
                       wiphy_name(local->hw.wiphy));
                dev_kfree_skb(skb);
                return;
        }
 
        if (status->excessive_retries) {
                struct sta_info *sta;
                sta = sta_info_get(local, hdr->addr1);
                if (sta) {
                        if (sta->flags & WLAN_STA_PS) {
                                /* The STA is in power save mode, so assume
                                 * that this TX packet failed because of that.
                                 */
                                status->excessive_retries = 0;
                                status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
                        }
                        sta_info_put(sta);
                }
        }
 
        if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
                struct sta_info *sta;
                sta = sta_info_get(local, hdr->addr1);
                if (sta) {
                        sta->tx_filtered_count++;
 
                        /* Clear the TX filter mask for this STA when sending
                         * the next packet. If the STA went to power save mode,
                         * this will happen when it is waking up for the next
                         * time. */
                        sta->clear_dst_mask = 1;
 
                        /* TODO: Is the WLAN_STA_PS flag always set here or is
                         * the race between RX and TX status causing some
                         * packets to be filtered out before 80211.o gets an
                         * update for PS status? This seems to be the case, so
                         * no changes are likely to be needed. */
                        if (sta->flags & WLAN_STA_PS &&
                            skb_queue_len(&sta->tx_filtered) <
                            STA_MAX_TX_BUFFER) {
                                ieee80211_remove_tx_extra(local, sta->key,
                                                          skb,
                                                          &status->control);
                                skb_queue_tail(&sta->tx_filtered, skb);
                        } else if (!(sta->flags & WLAN_STA_PS) &&
                                   !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
                                /* Software retry the packet once */
                                status->control.flags |= IEEE80211_TXCTL_REQUEUE;
                                ieee80211_remove_tx_extra(local, sta->key,
                                                          skb,
                                                          &status->control);
                                dev_queue_xmit(skb);
                        } else {
                                if (net_ratelimit()) {
                                        printk(KERN_DEBUG "%s: dropped TX "
                                               "filtered frame queue_len=%d "
                                               "PS=%d @%lu\n",
                                               wiphy_name(local->hw.wiphy),
                                               skb_queue_len(
                                                       &sta->tx_filtered),
                                               !!(sta->flags & WLAN_STA_PS),
                                               jiffies);
                                }
                                dev_kfree_skb(skb);
                        }
                        sta_info_put(sta);
                        return;
                }
        } else {
                /* FIXME: STUPID to call this with both local and local->mdev */
                rate_control_tx_status(local, local->mdev, skb, status);
        }
 
        ieee80211_led_tx(local, 0);
 
        /* SNMP counters
         * Fragments are passed to low-level drivers as separate skbs, so these
         * are actually fragments, not frames. Update frame counters only for
         * the first fragment of the frame. */
 
        frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
        type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 
        if (status->flags & IEEE80211_TX_STATUS_ACK) {
                if (frag == 0) {
                        local->dot11TransmittedFrameCount++;
                        if (is_multicast_ether_addr(hdr->addr1))
                                local->dot11MulticastTransmittedFrameCount++;
                        if (status->retry_count > 0)
                                local->dot11RetryCount++;
                        if (status->retry_count > 1)
                                local->dot11MultipleRetryCount++;
                }
 
                /* This counter shall be incremented for an acknowledged MPDU
                 * with an individual address in the address 1 field or an MPDU
                 * with a multicast address in the address 1 field of type Data
                 * or Management. */
                if (!is_multicast_ether_addr(hdr->addr1) ||
                    type == IEEE80211_FTYPE_DATA ||
                    type == IEEE80211_FTYPE_MGMT)
                        local->dot11TransmittedFragmentCount++;
        } else {
                if (frag == 0)
                        local->dot11FailedCount++;
        }
 
        /* this was a transmitted frame, but now we want to reuse it */
        skb_orphan(skb);
 
        if (!local->monitors) {
                dev_kfree_skb(skb);
                return;
        }
 
        /* send frame to monitor interfaces now */
 
        if (skb_headroom(skb) < sizeof(*rthdr)) {
                printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
                dev_kfree_skb(skb);
                return;
        }
 
        rthdr = (struct ieee80211_tx_status_rtap_hdr*)
                                skb_push(skb, sizeof(*rthdr));
 
        memset(rthdr, 0, sizeof(*rthdr));
        rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
        rthdr->hdr.it_present =
                cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
                            (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 
        if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
            !is_multicast_ether_addr(hdr->addr1))
                rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 
        if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
            (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
                rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
        else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
                rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 
        rthdr->data_retries = status->retry_count;
 
        rcu_read_lock();
        monitors = local->monitors;
        list_for_each_entry_rcu(sdata, &local->interfaces, list) {
                /*
                 * Using the monitors counter is possibly racy, but
                 * if the value is wrong we simply either clone the skb
                 * once too much or forget sending it to one monitor iface
                 * The latter case isn't nice but fixing the race is much
                 * more complicated.
                 */
                if (!monitors || !skb)
                        goto out;
 
                if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
                        if (!netif_running(sdata->dev))
                                continue;
                        monitors--;
                        if (monitors)
                                skb2 = skb_clone(skb, GFP_ATOMIC);
                        else
                                skb2 = NULL;
                        skb->dev = sdata->dev;
                        /* XXX: is this sufficient for BPF? */
                        skb_set_mac_header(skb, 0);
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
                        skb->pkt_type = PACKET_OTHERHOST;
                        skb->protocol = htons(ETH_P_802_2);
                        memset(skb->cb, 0, sizeof(skb->cb));
                        netif_rx(skb);
                        skb = skb2;
                }
        }
 out:
        rcu_read_unlock();
        if (skb)
                dev_kfree_skb(skb);
}
EXPORT_SYMBOL(ieee80211_tx_status);
 
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
                                        const struct ieee80211_ops *ops)
{
        struct net_device *mdev;
        struct ieee80211_local *local;
        struct ieee80211_sub_if_data *sdata;
        int priv_size;
        struct wiphy *wiphy;
 
        /* Ensure 32-byte alignment of our private data and hw private data.
         * We use the wiphy priv data for both our ieee80211_local and for
         * the driver's private data
         *
         * In memory it'll be like this:
         *
         * +-------------------------+
         * | struct wiphy           |
         * +-------------------------+
         * | struct ieee80211_local  |
         * +-------------------------+
         * | driver's private data   |
         * +-------------------------+
         *
         */
        priv_size = ((sizeof(struct ieee80211_local) +
                      NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
                    priv_data_len;
 
        wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 
        if (!wiphy)
                return NULL;
 
        wiphy->privid = mac80211_wiphy_privid;
 
        local = wiphy_priv(wiphy);
        local->hw.wiphy = wiphy;
 
        local->hw.priv = (char *)local +
                         ((sizeof(struct ieee80211_local) +
                           NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
 
        BUG_ON(!ops->tx);
        BUG_ON(!ops->start);
        BUG_ON(!ops->stop);
        BUG_ON(!ops->config);
        BUG_ON(!ops->add_interface);
        BUG_ON(!ops->remove_interface);
        BUG_ON(!ops->configure_filter);
        local->ops = ops;
 
        /* for now, mdev needs sub_if_data :/ */
        mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
                            "wmaster%d", ether_setup);
        if (!mdev) {
                wiphy_free(wiphy);
                return NULL;
        }
 
        sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
        mdev->ieee80211_ptr = &sdata->wdev;
        sdata->wdev.wiphy = wiphy;
 
        local->hw.queues = 1; /* default */
 
        local->mdev = mdev;
        local->rx_pre_handlers = ieee80211_rx_pre_handlers;
        local->rx_handlers = ieee80211_rx_handlers;
        local->tx_handlers = ieee80211_tx_handlers;
 
        local->bridge_packets = 1;
 
        local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
        local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
        local->short_retry_limit = 7;
        local->long_retry_limit = 4;
        local->hw.conf.radio_enabled = 1;
 
        local->enabled_modes = ~0;
 
        INIT_LIST_HEAD(&local->modes_list);
 
        INIT_LIST_HEAD(&local->interfaces);
 
        INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
        ieee80211_rx_bss_list_init(mdev);
 
        sta_info_init(local);
 
        mdev->hard_start_xmit = ieee80211_master_start_xmit;
        mdev->open = ieee80211_master_open;
        mdev->stop = ieee80211_master_stop;
        mdev->type = ARPHRD_IEEE80211;
        mdev->header_ops = &ieee80211_header_ops;
        mdev->set_multicast_list = ieee80211_master_set_multicast_list;
 
        sdata->type = IEEE80211_IF_TYPE_AP;
        sdata->dev = mdev;
        sdata->local = local;
        sdata->u.ap.force_unicast_rateidx = -1;
        sdata->u.ap.max_ratectrl_rateidx = -1;
        ieee80211_if_sdata_init(sdata);
        /* no RCU needed since we're still during init phase */
        list_add_tail(&sdata->list, &local->interfaces);
 
        tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
                     (unsigned long)local);
        tasklet_disable(&local->tx_pending_tasklet);
 
        tasklet_init(&local->tasklet,
                     ieee80211_tasklet_handler,
                     (unsigned long) local);
        tasklet_disable(&local->tasklet);
 
        skb_queue_head_init(&local->skb_queue);
        skb_queue_head_init(&local->skb_queue_unreliable);
 
        return local_to_hw(local);
}
EXPORT_SYMBOL(ieee80211_alloc_hw);
 
int ieee80211_register_hw(struct ieee80211_hw *hw)
{
        struct ieee80211_local *local = hw_to_local(hw);
        const char *name;
        int result;
 
        result = wiphy_register(local->hw.wiphy);
        if (result < 0)
                return result;
 
        name = wiphy_dev(local->hw.wiphy)->driver->name;
        local->hw.workqueue = create_singlethread_workqueue(name);
        if (!local->hw.workqueue) {
                result = -ENOMEM;
                goto fail_workqueue;
        }
 
        /*
         * The hardware needs headroom for sending the frame,
         * and we need some headroom for passing the frame to monitor
         * interfaces, but never both at the same time.
         */
        local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
                                   sizeof(struct ieee80211_tx_status_rtap_hdr));
 
        debugfs_hw_add(local);
 
        local->hw.conf.beacon_int = 1000;
 
        local->wstats_flags |= local->hw.max_rssi ?
                               IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
        local->wstats_flags |= local->hw.max_signal ?
                               IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
        local->wstats_flags |= local->hw.max_noise ?
                               IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
        if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
                local->wstats_flags |= IW_QUAL_DBM;
 
        result = sta_info_start(local);
        if (result < 0)
                goto fail_sta_info;
 
        rtnl_lock();
        result = dev_alloc_name(local->mdev, local->mdev->name);
        if (result < 0)
                goto fail_dev;
 
        memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
        SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
 
        result = register_netdevice(local->mdev);
        if (result < 0)
                goto fail_dev;
 
        ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
        ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
 
        result = ieee80211_init_rate_ctrl_alg(local,
                                              hw->rate_control_algorithm);
        if (result < 0) {
                printk(KERN_DEBUG "%s: Failed to initialize rate control "
                       "algorithm\n", wiphy_name(local->hw.wiphy));
                goto fail_rate;
        }
 
        result = ieee80211_wep_init(local);
 
        if (result < 0) {
                printk(KERN_DEBUG "%s: Failed to initialize wep\n",
                       wiphy_name(local->hw.wiphy));
                goto fail_wep;
        }
 
        ieee80211_install_qdisc(local->mdev);
 
        /* add one default STA interface */
        result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
                                  IEEE80211_IF_TYPE_STA);
        if (result)
                printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
                       wiphy_name(local->hw.wiphy));
 
        local->reg_state = IEEE80211_DEV_REGISTERED;
        rtnl_unlock();
 
        ieee80211_led_init(local);
 
        return 0;
 
fail_wep:
        rate_control_deinitialize(local);
fail_rate:
        ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
        unregister_netdevice(local->mdev);
fail_dev:
        rtnl_unlock();
        sta_info_stop(local);
fail_sta_info:
        debugfs_hw_del(local);
        destroy_workqueue(local->hw.workqueue);
fail_workqueue:
        wiphy_unregister(local->hw.wiphy);
        return result;
}
EXPORT_SYMBOL(ieee80211_register_hw);
 
int ieee80211_register_hwmode(struct ieee80211_hw *hw,
                              struct ieee80211_hw_mode *mode)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_rate *rate;
        int i;
 
        INIT_LIST_HEAD(&mode->list);
        list_add_tail(&mode->list, &local->modes_list);
 
        local->hw_modes |= (1 << mode->mode);
        for (i = 0; i < mode->num_rates; i++) {
                rate = &(mode->rates[i]);
                rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
        }
        ieee80211_prepare_rates(local, mode);
 
        if (!local->oper_hw_mode) {
                /* Default to this mode */
                local->hw.conf.phymode = mode->mode;
                local->oper_hw_mode = local->scan_hw_mode = mode;
                local->oper_channel = local->scan_channel = &mode->channels[0];
                local->hw.conf.mode = local->oper_hw_mode;
                local->hw.conf.chan = local->oper_channel;
        }
 
        if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
                ieee80211_set_default_regdomain(mode);
 
        return 0;
}
EXPORT_SYMBOL(ieee80211_register_hwmode);
 
void ieee80211_unregister_hw(struct ieee80211_hw *hw)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_sub_if_data *sdata, *tmp;
        int i;
 
        tasklet_kill(&local->tx_pending_tasklet);
        tasklet_kill(&local->tasklet);
 
        rtnl_lock();
 
        BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
 
        local->reg_state = IEEE80211_DEV_UNREGISTERED;
 
        /*
         * At this point, interface list manipulations are fine
         * because the driver cannot be handing us frames any
         * more and the tasklet is killed.
         */
 
        /*
         * First, we remove all non-master interfaces. Do this because they
         * may have bss pointer dependency on the master, and when we free
         * the master these would be freed as well, breaking our list
         * iteration completely.
         */
        list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
                if (sdata->dev == local->mdev)
                        continue;
                list_del(&sdata->list);
                __ieee80211_if_del(local, sdata);
        }
 
        /* then, finally, remove the master interface */
        __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
 
        rtnl_unlock();
 
        ieee80211_rx_bss_list_deinit(local->mdev);
        ieee80211_clear_tx_pending(local);
        sta_info_stop(local);
        rate_control_deinitialize(local);
        debugfs_hw_del(local);
 
        for (i = 0; i < NUM_IEEE80211_MODES; i++) {
                kfree(local->supp_rates[i]);
                kfree(local->basic_rates[i]);
        }
 
        if (skb_queue_len(&local->skb_queue)
                        || skb_queue_len(&local->skb_queue_unreliable))
                printk(KERN_WARNING "%s: skb_queue not empty\n",
                       wiphy_name(local->hw.wiphy));
        skb_queue_purge(&local->skb_queue);
        skb_queue_purge(&local->skb_queue_unreliable);
 
        destroy_workqueue(local->hw.workqueue);
        wiphy_unregister(local->hw.wiphy);
        ieee80211_wep_free(local);
        ieee80211_led_exit(local);
}
EXPORT_SYMBOL(ieee80211_unregister_hw);
 
void ieee80211_free_hw(struct ieee80211_hw *hw)
{
        struct ieee80211_local *local = hw_to_local(hw);
 
        ieee80211_if_free(local->mdev);
        wiphy_free(local->hw.wiphy);
}
EXPORT_SYMBOL(ieee80211_free_hw);
 
static int __init ieee80211_init(void)
{
        struct sk_buff *skb;
        int ret;
 
        BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
 
#ifdef CONFIG_MAC80211_RCSIMPLE
        ret = ieee80211_rate_control_register(&mac80211_rcsimple);
        if (ret)
                return ret;
#endif
 
        ret = ieee80211_wme_register();
        if (ret) {
#ifdef CONFIG_MAC80211_RCSIMPLE
                ieee80211_rate_control_unregister(&mac80211_rcsimple);
#endif
                printk(KERN_DEBUG "ieee80211_init: failed to "
                       "initialize WME (err=%d)\n", ret);
                return ret;
        }
 
        ieee80211_debugfs_netdev_init();
        ieee80211_regdomain_init();
 
        return 0;
}
 
static void __exit ieee80211_exit(void)
{
#ifdef CONFIG_MAC80211_RCSIMPLE
        ieee80211_rate_control_unregister(&mac80211_rcsimple);
#endif
 
        ieee80211_wme_unregister();
        ieee80211_debugfs_netdev_exit();
}
 
 
subsys_initcall(ieee80211_init);
module_exit(ieee80211_exit);
 
MODULE_DESCRIPTION("IEEE 802.11 subsystem");
MODULE_LICENSE("GPL");
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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [net/] [mac80211/] [ieee80211.c] - Blame information for rev 17

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
2			`* Copyright 2002-2005, Instant802 Networks, Inc.`
3			`* Copyright 2005-2006, Devicescape Software, Inc.`
4			`* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>`
5			`*`
6			`* This program is free software; you can redistribute it and/or modify`
7			`* it under the terms of the GNU General Public License version 2 as`
8			`* published by the Free Software Foundation.`
9			`*/`
10
11			`#include <net/mac80211.h>`
12			`#include <net/ieee80211_radiotap.h>`
13			`#include <linux/module.h>`
14			`#include <linux/init.h>`
15			`#include <linux/netdevice.h>`
16			`#include <linux/types.h>`
17			`#include <linux/slab.h>`
18			`#include <linux/skbuff.h>`
19			`#include <linux/etherdevice.h>`
20			`#include <linux/if_arp.h>`
21			`#include <linux/wireless.h>`
22			`#include <linux/rtnetlink.h>`
23			`#include <linux/bitmap.h>`
24			`#include <net/net_namespace.h>`
25			`#include <net/cfg80211.h>`
26
27			`#include "ieee80211_i.h"`
28			`#include "ieee80211_rate.h"`
29			`#include "wep.h"`
30			`#include "wme.h"`
31			`#include "aes_ccm.h"`
32			`#include "ieee80211_led.h"`
33			`#include "cfg.h"`
34			`#include "debugfs.h"`
35			`#include "debugfs_netdev.h"`
36
37			`/*`
38			`* For seeing transmitted packets on monitor interfaces`
39			`* we have a radiotap header too.`
40			`*/`