ieee80211.c 37.5 KB
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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>
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#include <net/net_namespace.h>
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#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"
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#include "cfg.h"
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#include "debugfs.h"
#include "debugfs_netdev.h"
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#define SUPP_MCS_SET_LEN 16

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/*
 * 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));

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/* common interface routines */
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static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
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{
	memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
	return ETH_ALEN;
}
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/* 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;

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	if (atomic_read(&local->iff_promiscs))
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		new_flags |= FIF_PROMISC_IN_BSS;

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	if (atomic_read(&local->iff_allmultis))
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		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);
}

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/* master interface */
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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;
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	/* we hold the RTNL here so can safely walk the list */
	list_for_each_entry(sdata, &local->interfaces, list) {
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		if (sdata->dev != dev && netif_running(sdata->dev)) {
			res = 0;
			break;
		}
	}
	return res;
}
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static int ieee80211_master_stop(struct net_device *dev)
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{
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	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_sub_if_data *sdata;
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	/* we hold the RTNL here so can safely walk the list */
	list_for_each_entry(sdata, &local->interfaces, list)
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		if (sdata->dev != dev && netif_running(sdata->dev))
			dev_close(sdata->dev);
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	return 0;
}
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static void ieee80211_master_set_multicast_list(struct net_device *dev)
{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);

	ieee80211_configure_filter(local);
}

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/* regular interfaces */
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static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
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{
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	/* 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;
	}
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#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;
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	return 0;
}

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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)));
}
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static int ieee80211_open(struct net_device *dev)
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{
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	struct ieee80211_sub_if_data *sdata, *nsdata;
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct ieee80211_if_init_conf conf;
	int res;
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	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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	/* we hold the RTNL here so can safely walk the list */
	list_for_each_entry(nsdata, &local->interfaces, list) {
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		struct net_device *ndev = nsdata->dev;
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		if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
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		    compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
			/*
			 * check whether it may have the same address
			 */
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			if (!identical_mac_addr_allowed(sdata->vif.type,
							nsdata->vif.type))
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				return -ENOTUNIQ;

			/*
			 * can only add VLANs to enabled APs
			 */
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			if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
			    nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
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			    netif_running(nsdata->dev))
				sdata->u.vlan.ap = nsdata;
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		}
	}
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	switch (sdata->vif.type) {
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	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;
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	case IEEE80211_IF_TYPE_AP:
	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_MNTR:
	case IEEE80211_IF_TYPE_IBSS:
		/* no special treatment */
		break;
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	case IEEE80211_IF_TYPE_INVALID:
		/* cannot happen */
		WARN_ON(1);
		break;
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	}
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	if (local->open_count == 0) {
		res = 0;
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		if (local->ops->start)
			res = local->ops->start(local_to_hw(local));
		if (res)
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			return res;
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		ieee80211_hw_config(local);
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		ieee80211_led_radio(local, local->hw.conf.radio_enabled);
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	}
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	switch (sdata->vif.type) {
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	case IEEE80211_IF_TYPE_VLAN:
		list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
		/* no need to tell driver */
		break;
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	case IEEE80211_IF_TYPE_MNTR:
		/* must be before the call to ieee80211_configure_filter */
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		local->monitors++;
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		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:
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		conf.vif = &sdata->vif;
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		conf.type = sdata->vif.type;
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		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;

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		ieee80211_if_config(dev);
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		ieee80211_reset_erp_info(dev);
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		ieee80211_enable_keys(sdata);
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		if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
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		    !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
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			netif_carrier_off(dev);
		else
			netif_carrier_on(dev);
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	}
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	if (local->open_count == 0) {
		res = dev_open(local->mdev);
		WARN_ON(res);
		tasklet_enable(&local->tx_pending_tasklet);
		tasklet_enable(&local->tasklet);
	}

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	/*
	 * 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);

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	local->open_count++;
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	netif_start_queue(dev);
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	return 0;
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}

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static int ieee80211_stop(struct net_device *dev)
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{
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	struct ieee80211_sub_if_data *sdata;
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	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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	struct ieee80211_if_init_conf conf;
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	struct sta_info *sta;
	int i;
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	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

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	list_for_each_entry(sta, &local->sta_list, list) {
		for (i = 0; i <  STA_TID_NUM; i++)
			ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr,
						i, WLAN_BACK_RECIPIENT,
						WLAN_REASON_QSTA_LEAVE_QBSS);
	}

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	netif_stop_queue(dev);

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	/*
	 * 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);

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	dev_mc_unsync(local->mdev, dev);

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	/* down all dependent devices, that is VLANs */
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	if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
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		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));
	}

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	local->open_count--;
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	switch (sdata->vif.type) {
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	case IEEE80211_IF_TYPE_VLAN:
		list_del(&sdata->u.vlan.list);
		sdata->u.vlan.ap = NULL;
		/* no need to tell driver */
		break;
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	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);

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			local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
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		}
		break;
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	case IEEE80211_IF_TYPE_STA:
	case IEEE80211_IF_TYPE_IBSS:
		sdata->u.sta.state = IEEE80211_DISABLED;
		del_timer_sync(&sdata->u.sta.timer);
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		/*
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		 * 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.
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		 */
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		synchronize_rcu();
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		skb_queue_purge(&sdata->u.sta.skb_queue);
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		if (local->scan_dev == sdata->dev) {
			if (!local->ops->hw_scan) {
				local->sta_sw_scanning = 0;
				cancel_delayed_work(&local->scan_work);
			} else
				local->sta_hw_scanning = 0;
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		}
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		flush_workqueue(local->hw.workqueue);
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		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;
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		/* fall through */
	default:
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		conf.vif = &sdata->vif;
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		conf.type = sdata->vif.type;
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		conf.mac_addr = dev->dev_addr;
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		/* disable all keys for as long as this netdev is down */
		ieee80211_disable_keys(sdata);
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		local->ops->remove_interface(local_to_hw(local), &conf);
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	}

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	if (local->open_count == 0) {
		if (netif_running(local->mdev))
			dev_close(local->mdev);
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		if (local->ops->stop)
			local->ops->stop(local_to_hw(local));
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		ieee80211_led_radio(local, 0);

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		tasklet_disable(&local->tx_pending_tasklet);
		tasklet_disable(&local->tasklet);
	}

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	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);
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	int allmulti, promisc, sdata_allmulti, sdata_promisc;
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	allmulti = !!(dev->flags & IFF_ALLMULTI);
	promisc = !!(dev->flags & IFF_PROMISC);
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	sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
	sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
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	if (allmulti != sdata_allmulti) {
		if (dev->flags & IFF_ALLMULTI)
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			atomic_inc(&local->iff_allmultis);
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		else
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			atomic_dec(&local->iff_allmultis);
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		sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
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	}
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	if (promisc != sdata_promisc) {
		if (dev->flags & IFF_PROMISC)
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			atomic_inc(&local->iff_promiscs);
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		else
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			atomic_dec(&local->iff_promiscs);
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		sdata->flags ^= IEEE80211_SDATA_PROMISC;
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	}
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	dev_mc_sync(local->mdev, dev);
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}

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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,
};

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/* Must not be called for mdev */
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void ieee80211_if_setup(struct net_device *dev)
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{
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	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;
}
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/* 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;
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	DECLARE_MAC_BUF(mac);
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	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) {
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		sta_info_free(sta);
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		sta_info_put(sta);
	} else {
		printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
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		       "peer %s\n",
		       dev->name, print_mac(mac, sdata->u.wds.remote_addr));
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	}

	/* Update WDS link data */
	memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);

	return 0;
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}

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/* 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))
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		return 0;

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	memset(&conf, 0, sizeof(conf));
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	conf.type = sdata->vif.type;
	if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
	    sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
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		conf.bssid = sdata->u.sta.bssid;
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		conf.ssid = sdata->u.sta.ssid;
		conf.ssid_len = sdata->u.sta.ssid_len;
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	} else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
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		conf.ssid = sdata->u.ap.ssid;
		conf.ssid_len = sdata->u.ap.ssid_len;
		conf.beacon = beacon;
		conf.beacon_control = control;
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	}
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	return local->ops->config_interface(local_to_hw(local),
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					    &sdata->vif, &conf);
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}

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int ieee80211_if_config(struct net_device *dev)
{
	return __ieee80211_if_config(dev, NULL, NULL);
}
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int ieee80211_if_config_beacon(struct net_device *dev)
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{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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	struct ieee80211_tx_control control;
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	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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	struct sk_buff *skb;
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	if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
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		return 0;
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	skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
				   &control);
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	if (!skb)
		return -ENOMEM;
	return __ieee80211_if_config(dev, skb, &control);
}
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int ieee80211_hw_config(struct ieee80211_local *local)
{
	struct ieee80211_hw_mode *mode;
	struct ieee80211_channel *chan;
	int ret = 0;
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	if (local->sta_sw_scanning) {
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		chan = local->scan_channel;
		mode = local->scan_hw_mode;
	} else {
		chan = local->oper_channel;
		mode = local->oper_hw_mode;
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	}

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	local->hw.conf.channel = chan->chan;
	local->hw.conf.channel_val = chan->val;
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	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);
	}
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	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;
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#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 */

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	if (local->open_count)
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		ret = local->ops->config(local_to_hw(local), &local->hw.conf);
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	return ret;
}
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/**
 * ieee80211_hw_config_ht should be used only after legacy configuration
 * has been determined, as ht configuration depends upon the hardware's
 * HT abilities for a _specific_ band.
 */
int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
			   struct ieee80211_ht_info *req_ht_cap,
			   struct ieee80211_ht_bss_info *req_bss_cap)
{
	struct ieee80211_conf *conf = &local->hw.conf;
	struct ieee80211_hw_mode *mode = conf->mode;
	int i;

	/* HT is not supported */
	if (!mode->ht_info.ht_supported) {
		conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
		return -EOPNOTSUPP;
	}

	/* disable HT */
	if (!enable_ht) {
		conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
	} else {
		conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
		conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
		conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
		conf->ht_conf.cap |=
			mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
		conf->ht_bss_conf.primary_channel =
			req_bss_cap->primary_channel;
		conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
		conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
		for (i = 0; i < SUPP_MCS_SET_LEN; i++)
			conf->ht_conf.supp_mcs_set[i] =
				mode->ht_info.supp_mcs_set[i] &
				  req_ht_cap->supp_mcs_set[i];

		/* In STA mode, this gives us indication
		 * to the AP's mode of operation */
		conf->ht_conf.ht_supported = 1;
		conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
		conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
	}

	local->ops->conf_ht(local_to_hw(local), &local->hw.conf);

	return 0;
}

631 632 633 634 635 636
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,
637 638
			!!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
			!(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
639 640 641 642 643 644
}

void ieee80211_reset_erp_info(struct net_device *dev)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

645 646
	sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
			IEEE80211_SDATA_SHORT_PREAMBLE);
647 648 649 650 651
	ieee80211_erp_info_change_notify(dev,
					 IEEE80211_ERP_CHANGE_PROTECTION |
					 IEEE80211_ERP_CHANGE_PREAMBLE);
}

652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
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));
706
			/* Clear skb->pkt_type in order to not confuse kernel
707 708 709 710 711 712 713 714 715 716 717 718 719 720
			 * 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",
721
			       wiphy_name(local->hw.wiphy), skb->pkt_type);
722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
			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;
741
	pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
742 743 744 745 746 747 748
	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;
749 750
	if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
		pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
751 752 753 754 755 756 757
	pkt_data->queue = control->queue;

	hdrlen = ieee80211_get_hdrlen_from_skb(skb);

	if (!key)
		goto no_key;

758
	switch (key->conf.alg) {
759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
	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;
	}

775
	if (skb->len >= mic_len &&
J
Johannes Berg 已提交
776
	    !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
		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;
803 804 805
	struct ieee80211_tx_status_rtap_hdr *rthdr;
	struct ieee80211_sub_if_data *sdata;
	int monitors;
806 807 808 809

	if (!status) {
		printk(KERN_ERR
		       "%s: ieee80211_tx_status called with NULL status\n",
810
		       wiphy_name(local->hw.wiphy));
811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
		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",
867
					       wiphy_name(local->hw.wiphy),
868 869 870 871 872 873 874 875 876 877
					       skb_queue_len(
						       &sta->tx_filtered),
					       !!(sta->flags & WLAN_STA_PS),
					       jiffies);
				}
				dev_kfree_skb(skb);
			}
			sta_info_put(sta);
			return;
		}
878 879
	} else
		rate_control_tx_status(local->mdev, skb, status);
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914

	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++;
	}

915 916 917 918
	/* this was a transmitted frame, but now we want to reuse it */
	skb_orphan(skb);

	if (!local->monitors) {
919 920 921 922
		dev_kfree_skb(skb);
		return;
	}

923
	/* send frame to monitor interfaces now */
924

925 926
	if (skb_headroom(skb) < sizeof(*rthdr)) {
		printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
927 928 929 930
		dev_kfree_skb(skb);
		return;
	}

931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951
	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;

952
	rcu_read_lock();
953
	monitors = local->monitors;
954
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
955 956 957 958 959 960 961 962 963 964
		/*
		 * 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;

965
		if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
966 967 968 969
			if (!netif_running(sdata->dev))
				continue;
			monitors--;
			if (monitors)
970
				skb2 = skb_clone(skb, GFP_ATOMIC);
971 972 973 974 975 976 977 978 979 980 981 982 983 984
			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:
985
	rcu_read_unlock();
986 987
	if (skb)
		dev_kfree_skb(skb);
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
}
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);

1033
	BUG_ON(!ops->tx);
1034 1035
	BUG_ON(!ops->start);
	BUG_ON(!ops->stop);
1036 1037
	BUG_ON(!ops->config);
	BUG_ON(!ops->add_interface);
1038 1039
	BUG_ON(!ops->remove_interface);
	BUG_ON(!ops->configure_filter);
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
	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;

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Johannes Berg 已提交
1069
	local->enabled_modes = ~0;
1070 1071 1072

	INIT_LIST_HEAD(&local->modes_list);

1073
	INIT_LIST_HEAD(&local->interfaces);
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083

	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;
1084
	mdev->header_ops = &ieee80211_header_ops;
1085
	mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1086

1087
	sdata->vif.type = IEEE80211_IF_TYPE_AP;
1088 1089 1090 1091 1092
	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);
1093 1094
	/* no RCU needed since we're still during init phase */
	list_add_tail(&sdata->list, &local->interfaces);
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128

	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;
	}

1129 1130 1131 1132 1133
	/*
	 * 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.
	 */
1134 1135
	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
				   sizeof(struct ieee80211_tx_status_rtap_hdr));
1136

J
Jiri Benc 已提交
1137 1138
	debugfs_hw_add(local);

1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
	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;

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Jiri Benc 已提交
1166
	ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1167
	ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
J
Jiri Benc 已提交
1168

1169 1170
	result = ieee80211_init_rate_ctrl_alg(local,
					      hw->rate_control_algorithm);
1171 1172
	if (result < 0) {
		printk(KERN_DEBUG "%s: Failed to initialize rate control "
1173
		       "algorithm\n", wiphy_name(local->hw.wiphy));
1174 1175 1176 1177 1178 1179 1180
		goto fail_rate;
	}

	result = ieee80211_wep_init(local);

	if (result < 0) {
		printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1181
		       wiphy_name(local->hw.wiphy));
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
		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",
1192
		       wiphy_name(local->hw.wiphy));
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203

	local->reg_state = IEEE80211_DEV_REGISTERED;
	rtnl_unlock();

	ieee80211_led_init(local);

	return 0;

fail_wep:
	rate_control_deinitialize(local);
fail_rate:
J
Jiri Benc 已提交
1204
	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1205 1206 1207 1208 1209
	unregister_netdevice(local->mdev);
fail_dev:
	rtnl_unlock();
	sta_info_stop(local);
fail_sta_info:
J
Jiri Benc 已提交
1210
	debugfs_hw_del(local);
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
	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))
1245
		ieee80211_set_default_regdomain(mode);
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265

	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;

1266 1267 1268 1269 1270
	/*
	 * At this point, interface list manipulations are fine
	 * because the driver cannot be handing us frames any
	 * more and the tasklet is killed.
	 */
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281

	/*
	 * 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);
1282
		__ieee80211_if_del(local, sdata);
1283 1284 1285 1286
	}

	/* then, finally, remove the master interface */
	__ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1287 1288 1289 1290 1291 1292 1293

	rtnl_unlock();

	ieee80211_rx_bss_list_deinit(local->mdev);
	ieee80211_clear_tx_pending(local);
	sta_info_stop(local);
	rate_control_deinitialize(local);
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Jiri Benc 已提交
1294
	debugfs_hw_del(local);
1295 1296 1297 1298 1299 1300 1301 1302 1303

	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",
1304
		       wiphy_name(local->hw.wiphy));
1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
	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));

1331
	ret = rc80211_simple_init();
1332
	if (ret)
1333 1334
		goto fail;

1335
	ret = rc80211_pid_init();
1336
	if (ret)
1337
		goto fail_simple;
1338

1339 1340 1341 1342
	ret = ieee80211_wme_register();
	if (ret) {
		printk(KERN_DEBUG "ieee80211_init: failed to "
		       "initialize WME (err=%d)\n", ret);
1343
		goto fail_pid;
1344 1345
	}

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Jiri Benc 已提交
1346
	ieee80211_debugfs_netdev_init();
1347
	ieee80211_regdomain_init();
J
Jiri Benc 已提交
1348

1349
	return 0;
1350

1351 1352 1353 1354 1355
 fail_pid:
	rc80211_simple_exit();
 fail_simple:
	rc80211_pid_exit();
 fail:
1356
	return ret;
1357 1358 1359 1360
}

static void __exit ieee80211_exit(void)
{
1361 1362
	rc80211_simple_exit();
	rc80211_pid_exit();
1363

1364
	ieee80211_wme_unregister();
J
Jiri Benc 已提交
1365
	ieee80211_debugfs_netdev_exit();
1366 1367 1368
}


1369
subsys_initcall(ieee80211_init);
1370 1371 1372 1373
module_exit(ieee80211_exit);

MODULE_DESCRIPTION("IEEE 802.11 subsystem");
MODULE_LICENSE("GPL");