[people/ms/linux.git] / drivers / net / wireless / mac80211_hwsim.c

/*
 * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
 *
 * 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.
 */

/*
 * TODO:
 * - IBSS mode simulation (Beacon transmission with competition for "air time")
 * - IEEE 802.11a and 802.11n modes
 * - RX filtering based on filter configuration (data->rx_filter)
 */

#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>

MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
MODULE_LICENSE("GPL");

static int radios = 2;
module_param(radios, int, 0444);
MODULE_PARM_DESC(radios, "Number of simulated radios");

struct hwsim_vif_priv {
	u32 magic;
};

#define HWSIM_VIF_MAGIC	0x69537748

static inline void hwsim_check_magic(struct ieee80211_vif *vif)
{
	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
	WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
}

static inline void hwsim_set_magic(struct ieee80211_vif *vif)
{
	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
	vp->magic = HWSIM_VIF_MAGIC;
}

static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
{
	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
	vp->magic = 0;
}

struct hwsim_sta_priv {
	u32 magic;
};

#define HWSIM_STA_MAGIC	0x6d537748

static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
{
	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
	WARN_ON(sp->magic != HWSIM_VIF_MAGIC);
}

static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
{
	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
	sp->magic = HWSIM_VIF_MAGIC;
}

static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
{
	struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
	sp->magic = 0;
}

static struct class *hwsim_class;

static struct ieee80211_hw **hwsim_radios;
static int hwsim_radio_count;
static struct net_device *hwsim_mon; /* global monitor netdev */


static const struct ieee80211_channel hwsim_channels[] = {
	{ .center_freq = 2412 },
	{ .center_freq = 2417 },
	{ .center_freq = 2422 },
	{ .center_freq = 2427 },
	{ .center_freq = 2432 },
	{ .center_freq = 2437 },
	{ .center_freq = 2442 },
	{ .center_freq = 2447 },
	{ .center_freq = 2452 },
	{ .center_freq = 2457 },
	{ .center_freq = 2462 },
	{ .center_freq = 2467 },
	{ .center_freq = 2472 },
	{ .center_freq = 2484 },
};

static const struct ieee80211_rate hwsim_rates[] = {
	{ .bitrate = 10 },
	{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	{ .bitrate = 60 },
	{ .bitrate = 90 },
	{ .bitrate = 120 },
	{ .bitrate = 180 },
	{ .bitrate = 240 },
	{ .bitrate = 360 },
	{ .bitrate = 480 },
	{ .bitrate = 540 }
};

struct mac80211_hwsim_data {
	struct device *dev;
	struct ieee80211_supported_band band;
	struct ieee80211_channel channels[ARRAY_SIZE(hwsim_channels)];
	struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];

	struct ieee80211_channel *channel;
	int radio_enabled;
	unsigned long beacon_int; /* in jiffies unit */
	unsigned int rx_filter;
	int started;
	struct timer_list beacon_timer;
};


struct hwsim_radiotap_hdr {
	struct ieee80211_radiotap_header hdr;
	u8 rt_flags;
	u8 rt_rate;
	__le16 rt_channel;
	__le16 rt_chbitmask;
} __attribute__ ((packed));


static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
{
	/* TODO: allow packet injection */
	dev_kfree_skb(skb);
	return 0;
}


static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
				      struct sk_buff *tx_skb)
{
	struct mac80211_hwsim_data *data = hw->priv;
	struct sk_buff *skb;
	struct hwsim_radiotap_hdr *hdr;
	u16 flags;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
	struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);

	if (!netif_running(hwsim_mon))
		return;

	skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
	if (skb == NULL)
		return;

	hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
	hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
	hdr->hdr.it_pad = 0;
	hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
	hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
					  (1 << IEEE80211_RADIOTAP_RATE) |
					  (1 << IEEE80211_RADIOTAP_CHANNEL));
	hdr->rt_flags = 0;
	hdr->rt_rate = txrate->bitrate / 5;
	hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
	flags = IEEE80211_CHAN_2GHZ;
	if (txrate->flags & IEEE80211_RATE_ERP_G)
		flags |= IEEE80211_CHAN_OFDM;
	else
		flags |= IEEE80211_CHAN_CCK;
	hdr->rt_chbitmask = cpu_to_le16(flags);

	skb->dev = hwsim_mon;
	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);
}


static int mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
				   struct sk_buff *skb)
{
	struct mac80211_hwsim_data *data = hw->priv;
	int i, ack = 0;
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_rx_status rx_status;

	memset(&rx_status, 0, sizeof(rx_status));
	/* TODO: set mactime */
	rx_status.freq = data->channel->center_freq;
	rx_status.band = data->channel->band;
	rx_status.rate_idx = info->tx_rate_idx;
	/* TODO: simulate signal strength (and optional packet drop) */

	/* Copy skb to all enabled radios that are on the current frequency */
	for (i = 0; i < hwsim_radio_count; i++) {
		struct mac80211_hwsim_data *data2;
		struct sk_buff *nskb;

		if (hwsim_radios[i] == NULL || hwsim_radios[i] == hw)
			continue;
		data2 = hwsim_radios[i]->priv;
		if (!data2->started || !data2->radio_enabled ||
		    data->channel->center_freq != data2->channel->center_freq)
			continue;

		nskb = skb_copy(skb, GFP_ATOMIC);
		if (nskb == NULL)
			continue;

		if (memcmp(hdr->addr1, hwsim_radios[i]->wiphy->perm_addr,
			   ETH_ALEN) == 0)
			ack = 1;
		ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status);
	}

	return ack;
}


static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct mac80211_hwsim_data *data = hw->priv;
	int ack;
	struct ieee80211_tx_info *txi;

	mac80211_hwsim_monitor_rx(hw, skb);

	if (skb->len < 10) {
		/* Should not happen; just a sanity check for addr1 use */
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	if (!data->radio_enabled) {
		printk(KERN_DEBUG "%s: dropped TX frame since radio "
		       "disabled\n", wiphy_name(hw->wiphy));
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	ack = mac80211_hwsim_tx_frame(hw, skb);

	txi = IEEE80211_SKB_CB(skb);

	if (txi->control.vif)
		hwsim_check_magic(txi->control.vif);
	if (txi->control.sta)
		hwsim_check_sta_magic(txi->control.sta);

	memset(&txi->status, 0, sizeof(txi->status));
	if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK)) {
		if (ack)
			txi->flags |= IEEE80211_TX_STAT_ACK;
		else
			txi->status.excessive_retries = 1;
	}
	ieee80211_tx_status_irqsafe(hw, skb);
	return NETDEV_TX_OK;
}


static int mac80211_hwsim_start(struct ieee80211_hw *hw)
{
	struct mac80211_hwsim_data *data = hw->priv;
	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
	data->started = 1;
	return 0;
}


static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
{
	struct mac80211_hwsim_data *data = hw->priv;
	data->started = 0;
	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
}


static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
					struct ieee80211_if_init_conf *conf)
{
	DECLARE_MAC_BUF(mac);
	printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
	       wiphy_name(hw->wiphy), __func__, conf->type,
	       print_mac(mac, conf->mac_addr));
	hwsim_set_magic(conf->vif);
	return 0;
}


static void mac80211_hwsim_remove_interface(
	struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
{
	DECLARE_MAC_BUF(mac);
	printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
	       wiphy_name(hw->wiphy), __func__, conf->type,
	       print_mac(mac, conf->mac_addr));
	hwsim_check_magic(conf->vif);
	hwsim_clear_magic(conf->vif);
}


static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
				     struct ieee80211_vif *vif)
{
	struct ieee80211_hw *hw = arg;
	struct sk_buff *skb;
	struct ieee80211_tx_info *info;

	hwsim_check_magic(vif);

	if (vif->type != NL80211_IFTYPE_AP)
		return;

	skb = ieee80211_beacon_get(hw, vif);
	if (skb == NULL)
		return;
	info = IEEE80211_SKB_CB(skb);

	mac80211_hwsim_monitor_rx(hw, skb);
	mac80211_hwsim_tx_frame(hw, skb);
	dev_kfree_skb(skb);
}


static void mac80211_hwsim_beacon(unsigned long arg)
{
	struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
	struct mac80211_hwsim_data *data = hw->priv;

	if (!data->started || !data->radio_enabled)
		return;

	ieee80211_iterate_active_interfaces_atomic(
		hw, mac80211_hwsim_beacon_tx, hw);

	data->beacon_timer.expires = jiffies + data->beacon_int;
	add_timer(&data->beacon_timer);
}


static int mac80211_hwsim_config(struct ieee80211_hw *hw,
				 struct ieee80211_conf *conf)
{
	struct mac80211_hwsim_data *data = hw->priv;

	printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d beacon_int=%d)\n",
	       wiphy_name(hw->wiphy), __func__,
	       conf->channel->center_freq, conf->radio_enabled,
	       conf->beacon_int);

	data->channel = conf->channel;
	data->radio_enabled = conf->radio_enabled;
	data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
	if (data->beacon_int < 1)
		data->beacon_int = 1;

	if (!data->started || !data->radio_enabled)
		del_timer(&data->beacon_timer);
	else
		mod_timer(&data->beacon_timer, jiffies + data->beacon_int);

	return 0;
}


static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
					    unsigned int changed_flags,
					    unsigned int *total_flags,
					    int mc_count,
					    struct dev_addr_list *mc_list)
{
	struct mac80211_hwsim_data *data = hw->priv;

	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);

	data->rx_filter = 0;
	if (*total_flags & FIF_PROMISC_IN_BSS)
		data->rx_filter |= FIF_PROMISC_IN_BSS;
	if (*total_flags & FIF_ALLMULTI)
		data->rx_filter |= FIF_ALLMULTI;

	*total_flags = data->rx_filter;
}

static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
					   struct ieee80211_vif *vif,
					   struct ieee80211_if_conf *conf)
{
	hwsim_check_magic(vif);
	return 0;
}

static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
					    struct ieee80211_vif *vif,
					    struct ieee80211_bss_conf *info,
					    u32 changed)
{
	hwsim_check_magic(vif);
}

static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      enum sta_notify_cmd cmd,
				      struct ieee80211_sta *sta)
{
	hwsim_check_magic(vif);
	switch (cmd) {
	case STA_NOTIFY_ADD:
		hwsim_set_sta_magic(sta);
		break;
	case STA_NOTIFY_REMOVE:
		hwsim_clear_sta_magic(sta);
		break;
	}
}

static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
				  struct ieee80211_sta *sta,
				  bool set)
{
	hwsim_check_sta_magic(sta);
	return 0;
}

static const struct ieee80211_ops mac80211_hwsim_ops =
{
	.tx = mac80211_hwsim_tx,
	.start = mac80211_hwsim_start,
	.stop = mac80211_hwsim_stop,
	.add_interface = mac80211_hwsim_add_interface,
	.remove_interface = mac80211_hwsim_remove_interface,
	.config = mac80211_hwsim_config,
	.configure_filter = mac80211_hwsim_configure_filter,
	.config_interface = mac80211_hwsim_config_interface,
	.bss_info_changed = mac80211_hwsim_bss_info_changed,
	.sta_notify = mac80211_hwsim_sta_notify,
	.set_tim = mac80211_hwsim_set_tim,
};


static void mac80211_hwsim_free(void)
{
	int i;

	for (i = 0; i < hwsim_radio_count; i++) {
		if (hwsim_radios[i]) {
			struct mac80211_hwsim_data *data;
			data = hwsim_radios[i]->priv;
			ieee80211_unregister_hw(hwsim_radios[i]);
			device_unregister(data->dev);
			ieee80211_free_hw(hwsim_radios[i]);
		}
	}
	kfree(hwsim_radios);
	class_destroy(hwsim_class);
}


static struct device_driver mac80211_hwsim_driver = {
	.name = "mac80211_hwsim"
};


static void hwsim_mon_setup(struct net_device *dev)
{
	dev->hard_start_xmit = hwsim_mon_xmit;
	dev->destructor = free_netdev;
	ether_setup(dev);
	dev->tx_queue_len = 0;
	dev->type = ARPHRD_IEEE80211_RADIOTAP;
	memset(dev->dev_addr, 0, ETH_ALEN);
	dev->dev_addr[0] = 0x12;
}


static int __init init_mac80211_hwsim(void)
{
	int i, err = 0;
	u8 addr[ETH_ALEN];
	struct mac80211_hwsim_data *data;
	struct ieee80211_hw *hw;
	DECLARE_MAC_BUF(mac);

	if (radios < 1 || radios > 65535)
		return -EINVAL;

	hwsim_radio_count = radios;
	hwsim_radios = kcalloc(hwsim_radio_count,
			       sizeof(struct ieee80211_hw *), GFP_KERNEL);
	if (hwsim_radios == NULL)
		return -ENOMEM;

	hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
	if (IS_ERR(hwsim_class)) {
		kfree(hwsim_radios);
		return PTR_ERR(hwsim_class);
	}

	memset(addr, 0, ETH_ALEN);
	addr[0] = 0x02;

	for (i = 0; i < hwsim_radio_count; i++) {
		printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
		       i);
		hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
		if (hw == NULL) {
			printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
			       "failed\n");
			err = -ENOMEM;
			goto failed;
		}
		hwsim_radios[i] = hw;

		data = hw->priv;
		data->dev = device_create_drvdata(hwsim_class, NULL, 0, hw,
						"hwsim%d", i);
		if (IS_ERR(data->dev)) {
			printk(KERN_DEBUG
			       "mac80211_hwsim: device_create_drvdata "
			       "failed (%ld)\n", PTR_ERR(data->dev));
			err = -ENOMEM;
			goto failed_drvdata;
		}
		data->dev->driver = &mac80211_hwsim_driver;

		SET_IEEE80211_DEV(hw, data->dev);
		addr[3] = i >> 8;
		addr[4] = i;
		SET_IEEE80211_PERM_ADDR(hw, addr);

		hw->channel_change_time = 1;
		hw->queues = 4;
		hw->wiphy->interface_modes =
			BIT(NL80211_IFTYPE_STATION) |
			BIT(NL80211_IFTYPE_AP);
		hw->ampdu_queues = 1;

		/* ask mac80211 to reserve space for magic */
		hw->vif_data_size = sizeof(struct hwsim_vif_priv);
		hw->sta_data_size = sizeof(struct hwsim_sta_priv);

		memcpy(data->channels, hwsim_channels, sizeof(hwsim_channels));
		memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
		data->band.channels = data->channels;
		data->band.n_channels = ARRAY_SIZE(hwsim_channels);
		data->band.bitrates = data->rates;
		data->band.n_bitrates = ARRAY_SIZE(hwsim_rates);
		data->band.ht_info.ht_supported = 1;
		data->band.ht_info.cap = IEEE80211_HT_CAP_SUP_WIDTH |
			IEEE80211_HT_CAP_GRN_FLD |
			IEEE80211_HT_CAP_SGI_40 |
			IEEE80211_HT_CAP_DSSSCCK40;
		data->band.ht_info.ampdu_factor = 0x3;
		data->band.ht_info.ampdu_density = 0x6;
		memset(data->band.ht_info.supp_mcs_set, 0,
		       sizeof(data->band.ht_info.supp_mcs_set));
		data->band.ht_info.supp_mcs_set[0] = 0xff;
		data->band.ht_info.supp_mcs_set[1] = 0xff;
		data->band.ht_info.supp_mcs_set[12] =
			IEEE80211_HT_CAP_MCS_TX_DEFINED;
		hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &data->band;

		err = ieee80211_register_hw(hw);
		if (err < 0) {
			printk(KERN_DEBUG "mac80211_hwsim: "
			       "ieee80211_register_hw failed (%d)\n", err);
			goto failed_hw;
		}

		printk(KERN_DEBUG "%s: hwaddr %s registered\n",
		       wiphy_name(hw->wiphy),
		       print_mac(mac, hw->wiphy->perm_addr));

		setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
			    (unsigned long) hw);
	}

	hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
	if (hwsim_mon == NULL)
		goto failed;

	rtnl_lock();

	err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
	if (err < 0)
		goto failed_mon;


	err = register_netdevice(hwsim_mon);
	if (err < 0)
		goto failed_mon;

	rtnl_unlock();

	return 0;

failed_mon:
	rtnl_unlock();
	free_netdev(hwsim_mon);
	mac80211_hwsim_free();
	return err;

failed_hw:
	device_unregister(data->dev);
failed_drvdata:
	ieee80211_free_hw(hw);
	hwsim_radios[i] = NULL;
failed:
	mac80211_hwsim_free();
	return err;
}


static void __exit exit_mac80211_hwsim(void)
{
	printk(KERN_DEBUG "mac80211_hwsim: unregister %d radios\n",
	       hwsim_radio_count);

	unregister_netdev(hwsim_mon);
	mac80211_hwsim_free();
}


module_init(init_mac80211_hwsim);
module_exit(exit_mac80211_hwsim);
Commit	Line	Data
acc1e7a3 JM	1	/*
	2	* mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
	3	* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*/
	9
	10	/*
	11	* TODO:
	12	* - IBSS mode simulation (Beacon transmission with competition for "air time")
	13	* - IEEE 802.11a and 802.11n modes
	14	* - RX filtering based on filter configuration (data->rx_filter)
	15	*/
	16
	17	#include <net/mac80211.h>
	18	#include <net/ieee80211_radiotap.h>
	19	#include <linux/if_arp.h>
	20	#include <linux/rtnetlink.h>
	21	#include <linux/etherdevice.h>
	22
	23	MODULE_AUTHOR("Jouni Malinen");
	24	MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
	25	MODULE_LICENSE("GPL");
	26
	27	static int radios = 2;
	28	module_param(radios, int, 0444);
	29	MODULE_PARM_DESC(radios, "Number of simulated radios");
	30
8aa21e6f JB	31	struct hwsim_vif_priv {
	32	u32 magic;
	33	};
	34
	35	#define HWSIM_VIF_MAGIC 0x69537748
	36
	37	static inline void hwsim_check_magic(struct ieee80211_vif *vif)
	38	{
	39	struct hwsim_vif_priv vp = (void )vif->drv_priv;
	40	WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
	41	}
	42
	43	static inline void hwsim_set_magic(struct ieee80211_vif *vif)
	44	{
	45	struct hwsim_vif_priv vp = (void )vif->drv_priv;
	46	vp->magic = HWSIM_VIF_MAGIC;
	47	}
	48
	49	static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
	50	{
	51	struct hwsim_vif_priv vp = (void )vif->drv_priv;
	52	vp->magic = 0;
	53	}
acc1e7a3	54
81c06523 JB	55	struct hwsim_sta_priv {
	56	u32 magic;
	57	};
	58
	59	#define HWSIM_STA_MAGIC 0x6d537748
	60
	61	static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
	62	{
	63	struct hwsim_sta_priv sp = (void )sta->drv_priv;
	64	WARN_ON(sp->magic != HWSIM_VIF_MAGIC);
	65	}
	66
	67	static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
	68	{
	69	struct hwsim_sta_priv sp = (void )sta->drv_priv;
	70	sp->magic = HWSIM_VIF_MAGIC;
	71	}
	72
	73	static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
	74	{
	75	struct hwsim_sta_priv sp = (void )sta->drv_priv;
	76	sp->magic = 0;
	77	}
	78
acc1e7a3 JM	79	static struct class *hwsim_class;
	80
	81	static struct ieee80211_hw **hwsim_radios;
	82	static int hwsim_radio_count;
	83	static struct net_device hwsim_mon; / global monitor netdev */
	84
	85
	86	static const struct ieee80211_channel hwsim_channels[] = {
	87	{ .center_freq = 2412 },
	88	{ .center_freq = 2417 },
	89	{ .center_freq = 2422 },
	90	{ .center_freq = 2427 },
	91	{ .center_freq = 2432 },
	92	{ .center_freq = 2437 },
	93	{ .center_freq = 2442 },
	94	{ .center_freq = 2447 },
	95	{ .center_freq = 2452 },
	96	{ .center_freq = 2457 },
	97	{ .center_freq = 2462 },
	98	{ .center_freq = 2467 },
	99	{ .center_freq = 2472 },
	100	{ .center_freq = 2484 },
	101	};
	102
	103	static const struct ieee80211_rate hwsim_rates[] = {
	104	{ .bitrate = 10 },
	105	{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	106	{ .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	107	{ .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
	108	{ .bitrate = 60 },
	109	{ .bitrate = 90 },
	110	{ .bitrate = 120 },
	111	{ .bitrate = 180 },
	112	{ .bitrate = 240 },
	113	{ .bitrate = 360 },
	114	{ .bitrate = 480 },
	115	{ .bitrate = 540 }
	116	};
	117
	118	struct mac80211_hwsim_data {
	119	struct device *dev;
	120	struct ieee80211_supported_band band;
	121	struct ieee80211_channel channels[ARRAY_SIZE(hwsim_channels)];
	122	struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
	123
	124	struct ieee80211_channel *channel;
	125	int radio_enabled;
	126	unsigned long beacon_int; /* in jiffies unit */
	127	unsigned int rx_filter;
	128	int started;
	129	struct timer_list beacon_timer;
	130	};
	131
	132
	133	struct hwsim_radiotap_hdr {
	134	struct ieee80211_radiotap_header hdr;
	135	u8 rt_flags;
	136	u8 rt_rate;
	137	__le16 rt_channel;
	138	__le16 rt_chbitmask;
	139	} __attribute__ ((packed));
	140
	141
	142	static int hwsim_mon_xmit(struct sk_buff skb, struct net_device dev)
143	{
144	/* TODO: allow packet injection */
145	dev_kfree_skb(skb);
146	return 0;
147	}
148
149
150	static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
151	struct sk_buff *tx_skb)
152	{
153	struct mac80211_hwsim_data *data = hw->priv;
154	struct sk_buff *skb;
155	struct hwsim_radiotap_hdr *hdr;
156	u16 flags;
157	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
158	struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
159
160	if (!netif_running(hwsim_mon))
161	return;
162
163	skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
164	if (skb == NULL)
165	return;
166
167	hdr = (struct hwsim_radiotap_hdr ) skb_push(skb, sizeof(hdr));
168	hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
169	hdr->hdr.it_pad = 0;
170	hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
f248f105 JM	171	hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) \|
	172	(1 << IEEE80211_RADIOTAP_RATE) \|
	173	(1 << IEEE80211_RADIOTAP_CHANNEL));
acc1e7a3 JM	174	hdr->rt_flags = 0;
acc1e7a3 JM	175	hdr->rt_rate = txrate->bitrate / 5;
df70b4ac	176	hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
acc1e7a3 JM	177	flags = IEEE80211_CHAN_2GHZ;
	178	if (txrate->flags & IEEE80211_RATE_ERP_G)
	179	flags \|= IEEE80211_CHAN_OFDM;
	180	else
	181	flags \|= IEEE80211_CHAN_CCK;
	182	hdr->rt_chbitmask = cpu_to_le16(flags);
	183
	184	skb->dev = hwsim_mon;
	185	skb_set_mac_header(skb, 0);
	186	skb->ip_summed = CHECKSUM_UNNECESSARY;
	187	skb->pkt_type = PACKET_OTHERHOST;
f248f105	188	skb->protocol = htons(ETH_P_802_2);
acc1e7a3 JM	189	memset(skb->cb, 0, sizeof(skb->cb));
	190	netif_rx(skb);
	191	}
	192
	193
e36cfdc9 JM	194	static int mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
e36cfdc9 JM	195	struct sk_buff *skb)
acc1e7a3 JM	196	{
acc1e7a3 JM	197	struct mac80211_hwsim_data *data = hw->priv;
acc1e7a3	198	int i, ack = 0;
e36cfdc9	199	struct ieee80211_hdr hdr = (struct ieee80211_hdr ) skb->data;
acc1e7a3	200	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e36cfdc9	201	struct ieee80211_rx_status rx_status;
acc1e7a3 JM	202
	203	memset(&rx_status, 0, sizeof(rx_status));
	204	/* TODO: set mactime */
	205	rx_status.freq = data->channel->center_freq;
	206	rx_status.band = data->channel->band;
	207	rx_status.rate_idx = info->tx_rate_idx;
	208	/* TODO: simulate signal strength (and optional packet drop) */
	209
	210	/* Copy skb to all enabled radios that are on the current frequency */
	211	for (i = 0; i < hwsim_radio_count; i++) {
	212	struct mac80211_hwsim_data *data2;
	213	struct sk_buff *nskb;
	214
	215	if (hwsim_radios[i] == NULL \|\| hwsim_radios[i] == hw)
	216	continue;
	217	data2 = hwsim_radios[i]->priv;
	218	if (!data2->started \|\| !data2->radio_enabled \|\|
	219	data->channel->center_freq != data2->channel->center_freq)
	220	continue;
	221
	222	nskb = skb_copy(skb, GFP_ATOMIC);
	223	if (nskb == NULL)
	224	continue;
	225
	226	if (memcmp(hdr->addr1, hwsim_radios[i]->wiphy->perm_addr,
	227	ETH_ALEN) == 0)
	228	ack = 1;
	229	ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status);
	230	}
	231
e36cfdc9 JM	232	return ack;
	233	}
	234
	235
	236	static int mac80211_hwsim_tx(struct ieee80211_hw hw, struct sk_buff skb)
	237	{
	238	struct mac80211_hwsim_data *data = hw->priv;
	239	int ack;
	240	struct ieee80211_tx_info *txi;
	241
	242	mac80211_hwsim_monitor_rx(hw, skb);
	243
	244	if (skb->len < 10) {
	245	/* Should not happen; just a sanity check for addr1 use */
	246	dev_kfree_skb(skb);
	247	return NETDEV_TX_OK;
	248	}
	249
	250	if (!data->radio_enabled) {
	251	printk(KERN_DEBUG "%s: dropped TX frame since radio "
	252	"disabled\n", wiphy_name(hw->wiphy));
	253	dev_kfree_skb(skb);
	254	return NETDEV_TX_OK;
	255	}
	256
	257	ack = mac80211_hwsim_tx_frame(hw, skb);
	258
acc1e7a3	259	txi = IEEE80211_SKB_CB(skb);
8aa21e6f	260
25d834e1 JB	261	if (txi->control.vif)
25d834e1 JB	262	hwsim_check_magic(txi->control.vif);
81c06523 JB	263	if (txi->control.sta)
81c06523 JB	264	hwsim_check_sta_magic(txi->control.sta);
8aa21e6f	265
acc1e7a3 JM	266	memset(&txi->status, 0, sizeof(txi->status));
	267	if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK)) {
	268	if (ack)
	269	txi->flags \|= IEEE80211_TX_STAT_ACK;
	270	else
	271	txi->status.excessive_retries = 1;
	272	}
	273	ieee80211_tx_status_irqsafe(hw, skb);
	274	return NETDEV_TX_OK;
	275	}
	276
	277
	278	static int mac80211_hwsim_start(struct ieee80211_hw *hw)
	279	{
	280	struct mac80211_hwsim_data *data = hw->priv;
	281	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
	282	data->started = 1;
	283	return 0;
	284	}
	285
	286
	287	static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
	288	{
	289	struct mac80211_hwsim_data *data = hw->priv;
	290	data->started = 0;
	291	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
	292	}
	293
	294
	295	static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
	296	struct ieee80211_if_init_conf *conf)
	297	{
	298	DECLARE_MAC_BUF(mac);
	299	printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
	300	wiphy_name(hw->wiphy), __func__, conf->type,
	301	print_mac(mac, conf->mac_addr));
8aa21e6f	302	hwsim_set_magic(conf->vif);
acc1e7a3 JM	303	return 0;
	304	}
	305
	306
	307	static void mac80211_hwsim_remove_interface(
	308	struct ieee80211_hw hw, struct ieee80211_if_init_conf conf)
	309	{
	310	DECLARE_MAC_BUF(mac);
	311	printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
	312	wiphy_name(hw->wiphy), __func__, conf->type,
	313	print_mac(mac, conf->mac_addr));
8aa21e6f JB	314	hwsim_check_magic(conf->vif);
8aa21e6f JB	315	hwsim_clear_magic(conf->vif);
acc1e7a3 JM	316	}
	317
	318
	319	static void mac80211_hwsim_beacon_tx(void arg, u8 mac,
	320	struct ieee80211_vif *vif)
	321	{
	322	struct ieee80211_hw *hw = arg;
acc1e7a3	323	struct sk_buff *skb;
acc1e7a3 JM	324	struct ieee80211_tx_info *info;
acc1e7a3 JM	325
8aa21e6f JB	326	hwsim_check_magic(vif);
8aa21e6f JB	327
05c914fe	328	if (vif->type != NL80211_IFTYPE_AP)
acc1e7a3 JM	329	return;
	330
	331	skb = ieee80211_beacon_get(hw, vif);
	332	if (skb == NULL)
	333	return;
	334	info = IEEE80211_SKB_CB(skb);
	335
	336	mac80211_hwsim_monitor_rx(hw, skb);
e36cfdc9	337	mac80211_hwsim_tx_frame(hw, skb);
acc1e7a3 JM	338	dev_kfree_skb(skb);
	339	}
	340
	341
	342	static void mac80211_hwsim_beacon(unsigned long arg)
	343	{
	344	struct ieee80211_hw hw = (struct ieee80211_hw ) arg;
	345	struct mac80211_hwsim_data *data = hw->priv;
	346
	347	if (!data->started \|\| !data->radio_enabled)
	348	return;
	349
f248f105 JM	350	ieee80211_iterate_active_interfaces_atomic(
f248f105 JM	351	hw, mac80211_hwsim_beacon_tx, hw);
acc1e7a3 JM	352
	353	data->beacon_timer.expires = jiffies + data->beacon_int;
	354	add_timer(&data->beacon_timer);
	355	}
	356
	357
	358	static int mac80211_hwsim_config(struct ieee80211_hw *hw,
	359	struct ieee80211_conf *conf)
	360	{
	361	struct mac80211_hwsim_data *data = hw->priv;
	362
	363	printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d beacon_int=%d)\n",
	364	wiphy_name(hw->wiphy), __func__,
	365	conf->channel->center_freq, conf->radio_enabled,
	366	conf->beacon_int);
	367
	368	data->channel = conf->channel;
	369	data->radio_enabled = conf->radio_enabled;
	370	data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
	371	if (data->beacon_int < 1)
	372	data->beacon_int = 1;
	373
	374	if (!data->started \|\| !data->radio_enabled)
	375	del_timer(&data->beacon_timer);
	376	else
	377	mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
	378
	379	return 0;
	380	}
	381
	382
	383	static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
	384	unsigned int changed_flags,
	385	unsigned int *total_flags,
	386	int mc_count,
	387	struct dev_addr_list *mc_list)
	388	{
	389	struct mac80211_hwsim_data *data = hw->priv;
	390
	391	printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
	392
	393	data->rx_filter = 0;
	394	if (*total_flags & FIF_PROMISC_IN_BSS)
	395	data->rx_filter \|= FIF_PROMISC_IN_BSS;
	396	if (*total_flags & FIF_ALLMULTI)
	397	data->rx_filter \|= FIF_ALLMULTI;
	398
	399	*total_flags = data->rx_filter;
	400	}
	401
8aa21e6f JB	402	static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
	403	struct ieee80211_vif *vif,
	404	struct ieee80211_if_conf *conf)
	405	{
	406	hwsim_check_magic(vif);
	407	return 0;
	408	}
acc1e7a3	409
8aa21e6f JB	410	static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
	411	struct ieee80211_vif *vif,
	412	struct ieee80211_bss_conf *info,
	413	u32 changed)
	414	{
	415	hwsim_check_magic(vif);
	416	}
	417
	418	static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
	419	struct ieee80211_vif *vif,
17741cdc JB	420	enum sta_notify_cmd cmd,
17741cdc JB	421	struct ieee80211_sta *sta)
8aa21e6f JB	422	{
8aa21e6f JB	423	hwsim_check_magic(vif);
81c06523 JB	424	switch (cmd) {
	425	case STA_NOTIFY_ADD:
	426	hwsim_set_sta_magic(sta);
	427	break;
	428	case STA_NOTIFY_REMOVE:
	429	hwsim_clear_sta_magic(sta);
	430	break;
	431	}
	432	}
	433
	434	static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
	435	struct ieee80211_sta *sta,
	436	bool set)
	437	{
	438	hwsim_check_sta_magic(sta);
	439	return 0;
8aa21e6f	440	}
acc1e7a3 JM	441
	442	static const struct ieee80211_ops mac80211_hwsim_ops =
	443	{
	444	.tx = mac80211_hwsim_tx,
	445	.start = mac80211_hwsim_start,
	446	.stop = mac80211_hwsim_stop,
	447	.add_interface = mac80211_hwsim_add_interface,
	448	.remove_interface = mac80211_hwsim_remove_interface,
	449	.config = mac80211_hwsim_config,
	450	.configure_filter = mac80211_hwsim_configure_filter,
8aa21e6f JB	451	.config_interface = mac80211_hwsim_config_interface,
	452	.bss_info_changed = mac80211_hwsim_bss_info_changed,
	453	.sta_notify = mac80211_hwsim_sta_notify,
81c06523	454	.set_tim = mac80211_hwsim_set_tim,
acc1e7a3 JM	455	};
	456
	457
	458	static void mac80211_hwsim_free(void)
	459	{
	460	int i;
	461
	462	for (i = 0; i < hwsim_radio_count; i++) {
	463	if (hwsim_radios[i]) {
	464	struct mac80211_hwsim_data *data;
	465	data = hwsim_radios[i]->priv;
	466	ieee80211_unregister_hw(hwsim_radios[i]);
3a33cc10	467	device_unregister(data->dev);
acc1e7a3 JM	468	ieee80211_free_hw(hwsim_radios[i]);
	469	}
	470	}
	471	kfree(hwsim_radios);
	472	class_destroy(hwsim_class);
	473	}
	474
	475
	476	static struct device_driver mac80211_hwsim_driver = {
	477	.name = "mac80211_hwsim"
	478	};
	479
	480
	481	static void hwsim_mon_setup(struct net_device *dev)
	482	{
	483	dev->hard_start_xmit = hwsim_mon_xmit;
	484	dev->destructor = free_netdev;
	485	ether_setup(dev);
	486	dev->tx_queue_len = 0;
	487	dev->type = ARPHRD_IEEE80211_RADIOTAP;
	488	memset(dev->dev_addr, 0, ETH_ALEN);
	489	dev->dev_addr[0] = 0x12;
	490	}
	491
	492
	493	static int __init init_mac80211_hwsim(void)
	494	{
	495	int i, err = 0;
	496	u8 addr[ETH_ALEN];
	497	struct mac80211_hwsim_data *data;
	498	struct ieee80211_hw *hw;
	499	DECLARE_MAC_BUF(mac);
	500
	501	if (radios < 1 \|\| radios > 65535)
	502	return -EINVAL;
	503
	504	hwsim_radio_count = radios;
	505	hwsim_radios = kcalloc(hwsim_radio_count,
	506	sizeof(struct ieee80211_hw *), GFP_KERNEL);
	507	if (hwsim_radios == NULL)
	508	return -ENOMEM;
	509
	510	hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
	511	if (IS_ERR(hwsim_class)) {
	512	kfree(hwsim_radios);
	513	return PTR_ERR(hwsim_class);
	514	}
	515
	516	memset(addr, 0, ETH_ALEN);
	517	addr[0] = 0x02;
	518
	519	for (i = 0; i < hwsim_radio_count; i++) {
	520	printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
	521	i);
	522	hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
	523	if (hw == NULL) {
	524	printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
	525	"failed\n");
	526	err = -ENOMEM;
	527	goto failed;
	528	}
	529	hwsim_radios[i] = hw;
	530
	531	data = hw->priv;
e800f17c SR	532	data->dev = device_create_drvdata(hwsim_class, NULL, 0, hw,
e800f17c SR	533	"hwsim%d", i);
acc1e7a3	534	if (IS_ERR(data->dev)) {
e800f17c SR	535	printk(KERN_DEBUG
e800f17c SR	536	"mac80211_hwsim: device_create_drvdata "
acc1e7a3 JM	537	"failed (%ld)\n", PTR_ERR(data->dev));
acc1e7a3 JM	538	err = -ENOMEM;
3a33cc10	539	goto failed_drvdata;
acc1e7a3 JM	540	}
acc1e7a3 JM	541	data->dev->driver = &mac80211_hwsim_driver;
acc1e7a3 JM	542
	543	SET_IEEE80211_DEV(hw, data->dev);
	544	addr[3] = i >> 8;
	545	addr[4] = i;
	546	SET_IEEE80211_PERM_ADDR(hw, addr);
	547
	548	hw->channel_change_time = 1;
87e8b64e	549	hw->queues = 4;
f59ac048 LR	550	hw->wiphy->interface_modes =
	551	BIT(NL80211_IFTYPE_STATION) \|
	552	BIT(NL80211_IFTYPE_AP);
87e8b64e	553	hw->ampdu_queues = 1;
acc1e7a3	554
8aa21e6f JB	555	/* ask mac80211 to reserve space for magic */
8aa21e6f JB	556	hw->vif_data_size = sizeof(struct hwsim_vif_priv);
81c06523	557	hw->sta_data_size = sizeof(struct hwsim_sta_priv);
8aa21e6f	558
acc1e7a3 JM	559	memcpy(data->channels, hwsim_channels, sizeof(hwsim_channels));
	560	memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
	561	data->band.channels = data->channels;
	562	data->band.n_channels = ARRAY_SIZE(hwsim_channels);
	563	data->band.bitrates = data->rates;
	564	data->band.n_bitrates = ARRAY_SIZE(hwsim_rates);
87e8b64e JM	565	data->band.ht_info.ht_supported = 1;
	566	data->band.ht_info.cap = IEEE80211_HT_CAP_SUP_WIDTH \|
	567	IEEE80211_HT_CAP_GRN_FLD \|
	568	IEEE80211_HT_CAP_SGI_40 \|
	569	IEEE80211_HT_CAP_DSSSCCK40;
	570	data->band.ht_info.ampdu_factor = 0x3;
	571	data->band.ht_info.ampdu_density = 0x6;
	572	memset(data->band.ht_info.supp_mcs_set, 0,
	573	sizeof(data->band.ht_info.supp_mcs_set));
	574	data->band.ht_info.supp_mcs_set[0] = 0xff;
	575	data->band.ht_info.supp_mcs_set[1] = 0xff;
	576	data->band.ht_info.supp_mcs_set[12] =
	577	IEEE80211_HT_CAP_MCS_TX_DEFINED;
acc1e7a3 JM	578	hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &data->band;
	579
	580	err = ieee80211_register_hw(hw);
	581	if (err < 0) {
	582	printk(KERN_DEBUG "mac80211_hwsim: "
	583	"ieee80211_register_hw failed (%d)\n", err);
3a33cc10	584	goto failed_hw;
acc1e7a3 JM	585	}
	586
	587	printk(KERN_DEBUG "%s: hwaddr %s registered\n",
	588	wiphy_name(hw->wiphy),
	589	print_mac(mac, hw->wiphy->perm_addr));
	590
	591	setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
	592	(unsigned long) hw);
	593	}
	594
	595	hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
	596	if (hwsim_mon == NULL)
	597	goto failed;
	598
	599	rtnl_lock();
	600
	601	err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3a33cc10	602	if (err < 0)
acc1e7a3	603	goto failed_mon;
3a33cc10	604
acc1e7a3 JM	605
	606	err = register_netdevice(hwsim_mon);
	607	if (err < 0)
	608	goto failed_mon;
	609
	610	rtnl_unlock();
	611
	612	return 0;
	613
	614	failed_mon:
	615	rtnl_unlock();
	616	free_netdev(hwsim_mon);
3a33cc10 IS	617	mac80211_hwsim_free();
3a33cc10 IS	618	return err;
acc1e7a3	619
3a33cc10 IS	620	failed_hw:
	621	device_unregister(data->dev);
	622	failed_drvdata:
	623	ieee80211_free_hw(hw);
0b06b2ae	624	hwsim_radios[i] = NULL;
acc1e7a3 JM	625	failed:
	626	mac80211_hwsim_free();
	627	return err;
	628	}
	629
	630
	631	static void __exit exit_mac80211_hwsim(void)
	632	{
	633	printk(KERN_DEBUG "mac80211_hwsim: unregister %d radios\n",
	634	hwsim_radio_count);
	635
	636	unregister_netdev(hwsim_mon);
	637	mac80211_hwsim_free();
	638	}
	639
	640
	641	module_init(init_mac80211_hwsim);
	642	module_exit(exit_mac80211_hwsim);