ieee80211.c 37.3 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
			 */
			if (!identical_mac_addr_allowed(sdata->type,
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							nsdata->type))
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				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;
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		}
	}
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	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;
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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->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:
		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;

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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->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 */
	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));
	}

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	local->open_count--;
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	switch (sdata->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:
		conf.if_id = dev->ifindex;
		conf.type = sdata->type;
		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->type;
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	if (sdata->type == IEEE80211_IF_TYPE_STA ||
	    sdata->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;
	} 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;
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	}
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	return local->ops->config_interface(local_to_hw(local),
					   dev->ifindex, &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;
	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), dev->ifindex, &control);
	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;
}

629 630 631 632 633 634
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,
635 636
			!!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
			!(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
637 638 639 640 641 642
}

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

643 644
	sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
			IEEE80211_SDATA_SHORT_PREAMBLE);
645 646 647 648 649
	ieee80211_erp_info_change_notify(dev,
					 IEEE80211_ERP_CHANGE_PROTECTION |
					 IEEE80211_ERP_CHANGE_PREAMBLE);
}

650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718
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",
719
			       wiphy_name(local->hw.wiphy), skb->pkt_type);
720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739
			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;
740 741 742 743 744 745 746
	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;
747 748
	if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
		pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
749 750 751 752 753 754 755
	pkt_data->queue = control->queue;

	hdrlen = ieee80211_get_hdrlen_from_skb(skb);

	if (!key)
		goto no_key;

756
	switch (key->conf.alg) {
757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
	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;
	}

773
	if (skb->len >= mic_len &&
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Johannes Berg 已提交
774
	    !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
		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;
801 802 803
	struct ieee80211_tx_status_rtap_hdr *rthdr;
	struct ieee80211_sub_if_data *sdata;
	int monitors;
804 805 806 807

	if (!status) {
		printk(KERN_ERR
		       "%s: ieee80211_tx_status called with NULL status\n",
808
		       wiphy_name(local->hw.wiphy));
809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
		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",
865
					       wiphy_name(local->hw.wiphy),
866 867 868 869 870 871 872 873 874 875
					       skb_queue_len(
						       &sta->tx_filtered),
					       !!(sta->flags & WLAN_STA_PS),
					       jiffies);
				}
				dev_kfree_skb(skb);
			}
			sta_info_put(sta);
			return;
		}
876 877
	} else
		rate_control_tx_status(local->mdev, skb, status);
878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912

	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++;
	}

913 914 915 916
	/* this was a transmitted frame, but now we want to reuse it */
	skb_orphan(skb);

	if (!local->monitors) {
917 918 919 920
		dev_kfree_skb(skb);
		return;
	}

921
	/* send frame to monitor interfaces now */
922

923 924
	if (skb_headroom(skb) < sizeof(*rthdr)) {
		printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
925 926 927 928
		dev_kfree_skb(skb);
		return;
	}

929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	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;

950
	rcu_read_lock();
951
	monitors = local->monitors;
952
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
		/*
		 * 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)
968
				skb2 = skb_clone(skb, GFP_ATOMIC);
969 970 971 972 973 974 975 976 977 978 979 980 981 982
			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:
983
	rcu_read_unlock();
984 985
	if (skb)
		dev_kfree_skb(skb);
986 987 988 989 990 991 992 993 994 995 996 997 998 999 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
}
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);

1031
	BUG_ON(!ops->tx);
1032 1033
	BUG_ON(!ops->start);
	BUG_ON(!ops->stop);
1034 1035
	BUG_ON(!ops->config);
	BUG_ON(!ops->add_interface);
1036 1037
	BUG_ON(!ops->remove_interface);
	BUG_ON(!ops->configure_filter);
1038 1039 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
	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
1067
	local->enabled_modes = ~0;
1068 1069 1070

	INIT_LIST_HEAD(&local->modes_list);

1071
	INIT_LIST_HEAD(&local->interfaces);
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081

	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;
1082
	mdev->header_ops = &ieee80211_header_ops;
1083
	mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1084 1085 1086 1087 1088 1089 1090

	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);
1091 1092
	/* no RCU needed since we're still during init phase */
	list_add_tail(&sdata->list, &local->interfaces);
1093 1094 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

	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;
	}

1127 1128 1129 1130 1131
	/*
	 * 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.
	 */
1132 1133
	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
				   sizeof(struct ieee80211_tx_status_rtap_hdr));
1134

J
Jiri Benc 已提交
1135 1136
	debugfs_hw_add(local);

1137 1138 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
	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
1164
	ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1165
	ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
J
Jiri Benc 已提交
1166

1167 1168
	result = ieee80211_init_rate_ctrl_alg(local,
					      hw->rate_control_algorithm);
1169 1170
	if (result < 0) {
		printk(KERN_DEBUG "%s: Failed to initialize rate control "
1171
		       "algorithm\n", wiphy_name(local->hw.wiphy));
1172 1173 1174 1175 1176 1177 1178
		goto fail_rate;
	}

	result = ieee80211_wep_init(local);

	if (result < 0) {
		printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1179
		       wiphy_name(local->hw.wiphy));
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
		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",
1190
		       wiphy_name(local->hw.wiphy));
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201

	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
1202
	ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1203 1204 1205 1206 1207
	unregister_netdevice(local->mdev);
fail_dev:
	rtnl_unlock();
	sta_info_stop(local);
fail_sta_info:
J
Jiri Benc 已提交
1208
	debugfs_hw_del(local);
1209 1210 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
	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))
1243
		ieee80211_set_default_regdomain(mode);
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263

	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;

1264 1265 1266 1267 1268
	/*
	 * At this point, interface list manipulations are fine
	 * because the driver cannot be handing us frames any
	 * more and the tasklet is killed.
	 */
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279

	/*
	 * 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);
1280
		__ieee80211_if_del(local, sdata);
1281 1282 1283 1284
	}

	/* then, finally, remove the master interface */
	__ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1285 1286 1287 1288 1289 1290 1291

	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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1292
	debugfs_hw_del(local);
1293 1294 1295 1296 1297 1298 1299 1300 1301

	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",
1302
		       wiphy_name(local->hw.wiphy));
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
	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));

1329
	ret = rc80211_simple_init();
1330
	if (ret)
1331 1332
		goto fail;

1333
	ret = rc80211_pid_init();
1334
	if (ret)
1335
		goto fail_simple;
1336

1337 1338 1339 1340
	ret = ieee80211_wme_register();
	if (ret) {
		printk(KERN_DEBUG "ieee80211_init: failed to "
		       "initialize WME (err=%d)\n", ret);
1341
		goto fail_pid;
1342 1343
	}

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Jiri Benc 已提交
1344
	ieee80211_debugfs_netdev_init();
1345
	ieee80211_regdomain_init();
J
Jiri Benc 已提交
1346

1347
	return 0;
1348

1349 1350 1351 1352 1353
 fail_pid:
	rc80211_simple_exit();
 fail_simple:
	rc80211_pid_exit();
 fail:
1354
	return ret;
1355 1356 1357 1358
}

static void __exit ieee80211_exit(void)
{
1359 1360
	rc80211_simple_exit();
	rc80211_pid_exit();
1361

1362
	ieee80211_wme_unregister();
J
Jiri Benc 已提交
1363
	ieee80211_debugfs_netdev_exit();
1364 1365 1366
}


1367
subsys_initcall(ieee80211_init);
1368 1369 1370 1371
module_exit(ieee80211_exit);

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