path: root/net/mac80211/main.c

/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/rtnetlink.h>
#include <linux/bitmap.h>
#include <linux/pm_qos_params.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>

#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wep.h"
#include "wme.h"
#include "aes_ccm.h"
#include "led.h"
#include "cfg.h"
#include "debugfs.h"
#include "debugfs_netdev.h"

/*
 * For seeing transmitted packets on monitor interfaces
 * we have a radiotap header too.
 */
struct ieee80211_tx_status_rtap_hdr {
	struct ieee80211_radiotap_header hdr;
	u8 rate;
	u8 padding_for_rate;
	__le16 tx_flags;
	u8 data_retries;
} __attribute__ ((packed));


void ieee80211_configure_filter(struct ieee80211_local *local)
{
	u64 mc;
	unsigned int changed_flags;
	unsigned int new_flags = 0;

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

	if (atomic_read(&local->iff_allmultis))
		new_flags |= FIF_ALLMULTI;

	if (local->monitors || local->scanning)
		new_flags |= FIF_BCN_PRBRESP_PROMISC;

	if (local->fif_fcsfail)
		new_flags |= FIF_FCSFAIL;

	if (local->fif_plcpfail)
		new_flags |= FIF_PLCPFAIL;

	if (local->fif_control)
		new_flags |= FIF_CONTROL;

	if (local->fif_other_bss)
		new_flags |= FIF_OTHER_BSS;

	if (local->fif_pspoll)
		new_flags |= FIF_PSPOLL;

	spin_lock_bh(&local->filter_lock);
	changed_flags = local->filter_flags ^ new_flags;

	mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
	spin_unlock_bh(&local->filter_lock);

	/* be a bit nasty */
	new_flags |= (1<<31);

	drv_configure_filter(local, changed_flags, &new_flags, mc);

	WARN_ON(new_flags & (1<<31));

	local->filter_flags = new_flags & ~(1<<31);
}

static void ieee80211_reconfig_filter(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local, reconfig_filter);

	ieee80211_configure_filter(local);
}

int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
{
	struct ieee80211_channel *chan, *scan_chan;
	int ret = 0;
	int power;
	enum nl80211_channel_type channel_type;

	might_sleep();

	scan_chan = local->scan_channel;

	if (scan_chan) {
		chan = scan_chan;
		channel_type = NL80211_CHAN_NO_HT;
	} else {
		chan = local->oper_channel;
		channel_type = local->oper_channel_type;
	}

	if (chan != local->hw.conf.channel ||
	    channel_type != local->hw.conf.channel_type) {
		local->hw.conf.channel = chan;
		local->hw.conf.channel_type = channel_type;
		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
	}

	if (scan_chan)
		power = chan->max_power;
	else
		power = local->power_constr_level ?
			(chan->max_power - local->power_constr_level) :
			chan->max_power;

	if (local->user_power_level >= 0)
		power = min(power, local->user_power_level);

	if (local->hw.conf.power_level != power) {
		changed |= IEEE80211_CONF_CHANGE_POWER;
		local->hw.conf.power_level = power;
	}

	if (changed && local->open_count) {
		ret = drv_config(local, changed);
		/*
		 * Goal:
		 * HW reconfiguration should never fail, the driver has told
		 * us what it can support so it should live up to that promise.
		 *
		 * Current status:
		 * rfkill is not integrated with mac80211 and a
		 * configurat