mac80211_hwsim.c 31.3 KB
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/*
 * 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")
 * - RX filtering based on filter configuration (data->rx_filter)
 */

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#include <linux/list.h>
#include <linux/spinlock.h>
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#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
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#include <linux/debugfs.h>
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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");

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/**
 * enum hwsim_regtest - the type of regulatory tests we offer
 *
 * These are the different values you can use for the regtest
 * module parameter. This is useful to help test world roaming
 * and the driver regulatory_hint() call and combinations of these.
 * If you want to do specific alpha2 regulatory domain tests simply
 * use the userspace regulatory request as that will be respected as
 * well without the need of this module parameter. This is designed
 * only for testing the driver regulatory request, world roaming
 * and all possible combinations.
 *
 * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
 * 	this is the default value.
 * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
 *	hint, only one driver regulatory hint will be sent as such the
 * 	secondary radios are expected to follow.
 * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
 * 	request with all radios reporting the same regulatory domain.
 * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
 * 	different regulatory domains requests. Expected behaviour is for
 * 	an intersection to occur but each device will still use their
 * 	respective regulatory requested domains. Subsequent radios will
 * 	use the resulting intersection.
 * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We acomplish
 *	this by using a custom beacon-capable regulatory domain for the first
 *	radio. All other device world roam.
 * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
 * 	domain requests. All radios will adhere to this custom world regulatory
 * 	domain.
 * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
 * 	domain requests. The first radio will adhere to the first custom world
 * 	regulatory domain, the second one to the second custom world regulatory
 * 	domain. All other devices will world roam.
 * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 *	settings, only the first radio will send a regulatory domain request
 *	and use strict settings. The rest of the radios are expected to follow.
 * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 *	settings. All radios will adhere to this.
 * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 *	domain settings, combined with secondary driver regulatory domain
 *	settings. The first radio will get a strict regulatory domain setting
 *	using the first driver regulatory request and the second radio will use
 *	non-strict settings using the second driver regulatory request. All
 *	other devices should follow the intersection created between the
 *	first two.
 * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 * 	at least 6 radios for a complete test. We will test in this order:
 * 	1 - driver custom world regulatory domain
 * 	2 - second custom world regulatory domain
 * 	3 - first driver regulatory domain request
 * 	4 - second driver regulatory domain request
 * 	5 - strict regulatory domain settings using the third driver regulatory
 * 	    domain request
 * 	6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 * 	           regulatory requests.
 */
enum hwsim_regtest {
	HWSIM_REGTEST_DISABLED = 0,
	HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
	HWSIM_REGTEST_DRIVER_REG_ALL = 2,
	HWSIM_REGTEST_DIFF_COUNTRY = 3,
	HWSIM_REGTEST_WORLD_ROAM = 4,
	HWSIM_REGTEST_CUSTOM_WORLD = 5,
	HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
	HWSIM_REGTEST_STRICT_FOLLOW = 7,
	HWSIM_REGTEST_STRICT_ALL = 8,
	HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
	HWSIM_REGTEST_ALL = 10,
};

/* Set to one of the HWSIM_REGTEST_* values above */
static int regtest = HWSIM_REGTEST_DISABLED;
module_param(regtest, int, 0444);
MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");

static const char *hwsim_alpha2s[] = {
	"FI",
	"AL",
	"US",
	"DE",
	"JP",
	"AL",
};

static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
	.n_reg_rules = 4,
	.alpha2 =  "99",
	.reg_rules = {
		REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
		REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
		REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
		REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
	}
};

static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
	.n_reg_rules = 2,
	.alpha2 =  "99",
	.reg_rules = {
		REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
		REG_RULE(5725-10, 5850+10, 40, 0, 30,
			NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
	}
};

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struct hwsim_vif_priv {
	u32 magic;
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	u8 bssid[ETH_ALEN];
	bool assoc;
	u16 aid;
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};

#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;
}
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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;
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	WARN_ON(sp->magic != HWSIM_STA_MAGIC);
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}

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

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

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static struct class *hwsim_class;

static struct net_device *hwsim_mon; /* global monitor netdev */

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#define CHAN2G(_freq)  { \
	.band = IEEE80211_BAND_2GHZ, \
	.center_freq = (_freq), \
	.hw_value = (_freq), \
	.max_power = 20, \
}

#define CHAN5G(_freq) { \
	.band = IEEE80211_BAND_5GHZ, \
	.center_freq = (_freq), \
	.hw_value = (_freq), \
	.max_power = 20, \
}

static const struct ieee80211_channel hwsim_channels_2ghz[] = {
	CHAN2G(2412), /* Channel 1 */
	CHAN2G(2417), /* Channel 2 */
	CHAN2G(2422), /* Channel 3 */
	CHAN2G(2427), /* Channel 4 */
	CHAN2G(2432), /* Channel 5 */
	CHAN2G(2437), /* Channel 6 */
	CHAN2G(2442), /* Channel 7 */
	CHAN2G(2447), /* Channel 8 */
	CHAN2G(2452), /* Channel 9 */
	CHAN2G(2457), /* Channel 10 */
	CHAN2G(2462), /* Channel 11 */
	CHAN2G(2467), /* Channel 12 */
	CHAN2G(2472), /* Channel 13 */
	CHAN2G(2484), /* Channel 14 */
};
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static const struct ieee80211_channel hwsim_channels_5ghz[] = {
	CHAN5G(5180), /* Channel 36 */
	CHAN5G(5200), /* Channel 40 */
	CHAN5G(5220), /* Channel 44 */
	CHAN5G(5240), /* Channel 48 */

	CHAN5G(5260), /* Channel 52 */
	CHAN5G(5280), /* Channel 56 */
	CHAN5G(5300), /* Channel 60 */
	CHAN5G(5320), /* Channel 64 */

	CHAN5G(5500), /* Channel 100 */
	CHAN5G(5520), /* Channel 104 */
	CHAN5G(5540), /* Channel 108 */
	CHAN5G(5560), /* Channel 112 */
	CHAN5G(5580), /* Channel 116 */
	CHAN5G(5600), /* Channel 120 */
	CHAN5G(5620), /* Channel 124 */
	CHAN5G(5640), /* Channel 128 */
	CHAN5G(5660), /* Channel 132 */
	CHAN5G(5680), /* Channel 136 */
	CHAN5G(5700), /* Channel 140 */

	CHAN5G(5745), /* Channel 149 */
	CHAN5G(5765), /* Channel 153 */
	CHAN5G(5785), /* Channel 157 */
	CHAN5G(5805), /* Channel 161 */
	CHAN5G(5825), /* Channel 165 */
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};

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 }
};

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static spinlock_t hwsim_radio_lock;
static struct list_head hwsim_radios;

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struct mac80211_hwsim_data {
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	struct list_head list;
	struct ieee80211_hw *hw;
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	struct device *dev;
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	struct ieee80211_supported_band bands[2];
	struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
	struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
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	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;
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	enum ps_mode {
		PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
	} ps;
	bool ps_poll_pending;
	struct dentry *debugfs;
	struct dentry *debugfs_ps;
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};


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));
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	hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
					  (1 << IEEE80211_RADIOTAP_RATE) |
					  (1 << IEEE80211_RADIOTAP_CHANNEL));
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	hdr->rt_flags = 0;
	hdr->rt_rate = txrate->bitrate / 5;
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	hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
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	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;
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	skb->protocol = htons(ETH_P_802_2);
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	memset(skb->cb, 0, sizeof(skb->cb));
	netif_rx(skb);
}


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static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
			   struct sk_buff *skb)
{
	switch (data->ps) {
	case PS_DISABLED:
		return true;
	case PS_ENABLED:
		return false;
	case PS_AUTO_POLL:
		/* TODO: accept (some) Beacons by default and other frames only
		 * if pending PS-Poll has been sent */
		return true;
	case PS_MANUAL_POLL:
		/* Allow unicast frames to own address if there is a pending
		 * PS-Poll */
		if (data->ps_poll_pending &&
		    memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
			   ETH_ALEN) == 0) {
			data->ps_poll_pending = false;
			return true;
		}
		return false;
	}

	return true;
}


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static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
				    struct sk_buff *skb)
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{
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	struct mac80211_hwsim_data *data = hw->priv, *data2;
	bool ack = false;
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	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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	struct ieee80211_rx_status rx_status;
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	memset(&rx_status, 0, sizeof(rx_status));
	/* TODO: set mactime */
	rx_status.freq = data->channel->center_freq;
	rx_status.band = data->channel->band;
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	rx_status.rate_idx = info->control.rates[0].idx;
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	/* TODO: simulate signal strength (and optional packet drop) */

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	if (data->ps != PS_DISABLED)
		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);

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	/* Copy skb to all enabled radios that are on the current frequency */
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	spin_lock(&hwsim_radio_lock);
	list_for_each_entry(data2, &hwsim_radios, list) {
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		struct sk_buff *nskb;

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		if (data == data2)
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			continue;
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		if (!data2->started || !data2->radio_enabled ||
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		    !hwsim_ps_rx_ok(data2, skb) ||
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		    data->channel->center_freq != data2->channel->center_freq)
			continue;

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

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		if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
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			   ETH_ALEN) == 0)
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			ack = true;
		ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
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	}
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	spin_unlock(&hwsim_radio_lock);
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	return ack;
}


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

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	txi = IEEE80211_SKB_CB(skb);
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	if (txi->control.vif)
		hwsim_check_magic(txi->control.vif);
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	if (txi->control.sta)
		hwsim_check_sta_magic(txi->control.sta);
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	ieee80211_tx_info_clear_status(txi);
	if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
		txi->flags |= IEEE80211_TX_STAT_ACK;
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	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;
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	del_timer(&data->beacon_timer);
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	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)
{
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	printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
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	       wiphy_name(hw->wiphy), __func__, conf->type,
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	       conf->mac_addr);
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	hwsim_set_magic(conf->vif);
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	return 0;
}


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


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;

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	hwsim_check_magic(vif);

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	if (vif->type != NL80211_IFTYPE_AP &&
	    vif->type != NL80211_IFTYPE_MESH_POINT)
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		return;

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

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

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	ieee80211_iterate_active_interfaces_atomic(
		hw, mac80211_hwsim_beacon_tx, hw);
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	data->beacon_timer.expires = jiffies + data->beacon_int;
	add_timer(&data->beacon_timer);
}


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static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
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{
	struct mac80211_hwsim_data *data = hw->priv;
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	struct ieee80211_conf *conf = &hw->conf;
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	printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d idle=%d ps=%d)\n",
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	       wiphy_name(hw->wiphy), __func__,
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	       conf->channel->center_freq, conf->radio_enabled,
	       !!(conf->flags & IEEE80211_CONF_IDLE),
	       !!(conf->flags & IEEE80211_CONF_PS));
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	data->channel = conf->channel;
	data->radio_enabled = conf->radio_enabled;
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	if (!data->started || !data->radio_enabled || !data->beacon_int)
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		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;
}

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static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
					    struct ieee80211_vif *vif,
					    struct ieee80211_bss_conf *info,
					    u32 changed)
{
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	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
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	struct mac80211_hwsim_data *data = hw->priv;
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	hwsim_check_magic(vif);
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	printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
	       wiphy_name(hw->wiphy), __func__, changed);

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	if (changed & BSS_CHANGED_BSSID) {
		printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
		       wiphy_name(hw->wiphy), __func__,
		       info->bssid);
		memcpy(vp->bssid, info->bssid, ETH_ALEN);
	}

612 613 614
	if (changed & BSS_CHANGED_ASSOC) {
		printk(KERN_DEBUG "  %s: ASSOC: assoc=%d aid=%d\n",
		       wiphy_name(hw->wiphy), info->assoc, info->aid);
615 616
		vp->assoc = info->assoc;
		vp->aid = info->aid;
617 618
	}

619 620 621 622
	if (changed & BSS_CHANGED_BEACON_INT) {
		printk(KERN_DEBUG "  %s: BCNINT: %d\n",
		       wiphy_name(hw->wiphy), info->beacon_int);
		data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
623
		if (WARN_ON(!data->beacon_int))
624 625 626
			data->beacon_int = 1;
	}

627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
	if (changed & BSS_CHANGED_ERP_CTS_PROT) {
		printk(KERN_DEBUG "  %s: ERP_CTS_PROT: %d\n",
		       wiphy_name(hw->wiphy), info->use_cts_prot);
	}

	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
		printk(KERN_DEBUG "  %s: ERP_PREAMBLE: %d\n",
		       wiphy_name(hw->wiphy), info->use_short_preamble);
	}

	if (changed & BSS_CHANGED_ERP_SLOT) {
		printk(KERN_DEBUG "  %s: ERP_SLOT: %d\n",
		       wiphy_name(hw->wiphy), info->use_short_slot);
	}

	if (changed & BSS_CHANGED_HT) {
S
Sujith 已提交
643
		printk(KERN_DEBUG "  %s: HT: op_mode=0x%x\n",
644
		       wiphy_name(hw->wiphy),
S
Sujith 已提交
645
		       info->ht.operation_mode);
646 647 648 649 650 651 652
	}

	if (changed & BSS_CHANGED_BASIC_RATES) {
		printk(KERN_DEBUG "  %s: BASIC_RATES: 0x%llx\n",
		       wiphy_name(hw->wiphy),
		       (unsigned long long) info->basic_rates);
	}
653 654 655 656
}

static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
657 658
				      enum sta_notify_cmd cmd,
				      struct ieee80211_sta *sta)
659 660
{
	hwsim_check_magic(vif);
661 662 663 664 665 666 667
	switch (cmd) {
	case STA_NOTIFY_ADD:
		hwsim_set_sta_magic(sta);
		break;
	case STA_NOTIFY_REMOVE:
		hwsim_clear_sta_magic(sta);
		break;
668 669 670 671
	case STA_NOTIFY_SLEEP:
	case STA_NOTIFY_AWAKE:
		/* TODO: make good use of these flags */
		break;
672 673 674 675 676 677 678 679 680
	}
}

static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
				  struct ieee80211_sta *sta,
				  bool set)
{
	hwsim_check_sta_magic(sta);
	return 0;
681
}
682

683 684 685 686 687 688 689 690 691 692 693
static int mac80211_hwsim_conf_tx(
	struct ieee80211_hw *hw, u16 queue,
	const struct ieee80211_tx_queue_params *params)
{
	printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
	       "aifs=%d)\n",
	       wiphy_name(hw->wiphy), __func__, queue,
	       params->txop, params->cw_min, params->cw_max, params->aifs);
	return 0;
}

694 695 696 697 698 699 700 701 702
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,
703 704
	.bss_info_changed = mac80211_hwsim_bss_info_changed,
	.sta_notify = mac80211_hwsim_sta_notify,
705
	.set_tim = mac80211_hwsim_set_tim,
706
	.conf_tx = mac80211_hwsim_conf_tx,
707 708 709 710 711
};


static void mac80211_hwsim_free(void)
{
712 713 714 715 716 717 718 719 720 721 722
	struct list_head tmplist, *i, *tmp;
	struct mac80211_hwsim_data *data;

	INIT_LIST_HEAD(&tmplist);

	spin_lock_bh(&hwsim_radio_lock);
	list_for_each_safe(i, tmp, &hwsim_radios)
		list_move(i, &tmplist);
	spin_unlock_bh(&hwsim_radio_lock);

	list_for_each_entry(data, &tmplist, list) {
723 724
		debugfs_remove(data->debugfs_ps);
		debugfs_remove(data->debugfs);
725 726 727
		ieee80211_unregister_hw(data->hw);
		device_unregister(data->dev);
		ieee80211_free_hw(data->hw);
728 729 730 731 732 733 734 735 736
	}
	class_destroy(hwsim_class);
}


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

737 738 739 740 741 742
static const struct net_device_ops hwsim_netdev_ops = {
	.ndo_start_xmit 	= hwsim_mon_xmit,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
};
743 744 745

static void hwsim_mon_setup(struct net_device *dev)
{
746
	dev->netdev_ops = &hwsim_netdev_ops;
747 748 749 750 751 752 753 754 755
	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;
}


756 757 758 759 760 761 762 763 764 765 766
static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
{
	struct mac80211_hwsim_data *data = dat;
	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
	DECLARE_MAC_BUF(buf);
	struct sk_buff *skb;
	struct ieee80211_pspoll *pspoll;

	if (!vp->assoc)
		return;

767 768
	printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
	       wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797

	skb = dev_alloc_skb(sizeof(*pspoll));
	if (!skb)
		return;
	pspoll = (void *) skb_put(skb, sizeof(*pspoll));
	pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
					    IEEE80211_STYPE_PSPOLL |
					    IEEE80211_FCTL_PM);
	pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
	memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
	memcpy(pspoll->ta, mac, ETH_ALEN);
	if (data->radio_enabled &&
	    !mac80211_hwsim_tx_frame(data->hw, skb))
		printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
	dev_kfree_skb(skb);
}


static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
				struct ieee80211_vif *vif, int ps)
{
	struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
	DECLARE_MAC_BUF(buf);
	struct sk_buff *skb;
	struct ieee80211_hdr *hdr;

	if (!vp->assoc)
		return;

798 799
	printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
	       wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874

	skb = dev_alloc_skb(sizeof(*hdr));
	if (!skb)
		return;
	hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
					 IEEE80211_STYPE_NULLFUNC |
					 (ps ? IEEE80211_FCTL_PM : 0));
	hdr->duration_id = cpu_to_le16(0);
	memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
	memcpy(hdr->addr2, mac, ETH_ALEN);
	memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
	if (data->radio_enabled &&
	    !mac80211_hwsim_tx_frame(data->hw, skb))
		printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
	dev_kfree_skb(skb);
}


static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
				   struct ieee80211_vif *vif)
{
	struct mac80211_hwsim_data *data = dat;
	hwsim_send_nullfunc(data, mac, vif, 1);
}


static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
				      struct ieee80211_vif *vif)
{
	struct mac80211_hwsim_data *data = dat;
	hwsim_send_nullfunc(data, mac, vif, 0);
}


static int hwsim_fops_ps_read(void *dat, u64 *val)
{
	struct mac80211_hwsim_data *data = dat;
	*val = data->ps;
	return 0;
}

static int hwsim_fops_ps_write(void *dat, u64 val)
{
	struct mac80211_hwsim_data *data = dat;
	enum ps_mode old_ps;

	if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
	    val != PS_MANUAL_POLL)
		return -EINVAL;

	old_ps = data->ps;
	data->ps = val;

	if (val == PS_MANUAL_POLL) {
		ieee80211_iterate_active_interfaces(data->hw,
						    hwsim_send_ps_poll, data);
		data->ps_poll_pending = true;
	} else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
		ieee80211_iterate_active_interfaces(data->hw,
						    hwsim_send_nullfunc_ps,
						    data);
	} else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
		ieee80211_iterate_active_interfaces(data->hw,
						    hwsim_send_nullfunc_no_ps,
						    data);
	}

	return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
			"%llu\n");


875 876 877 878 879 880
static int __init init_mac80211_hwsim(void)
{
	int i, err = 0;
	u8 addr[ETH_ALEN];
	struct mac80211_hwsim_data *data;
	struct ieee80211_hw *hw;
881
	enum ieee80211_band band;
882

883
	if (radios < 1 || radios > 100)
884 885
		return -EINVAL;

886 887
	spin_lock_init(&hwsim_radio_lock);
	INIT_LIST_HEAD(&hwsim_radios);
888 889

	hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
890
	if (IS_ERR(hwsim_class))
891 892 893 894 895
		return PTR_ERR(hwsim_class);

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

896
	for (i = 0; i < radios; i++) {
897 898 899
		printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
		       i);
		hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
900
		if (!hw) {
901 902 903 904 905 906
			printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
			       "failed\n");
			err = -ENOMEM;
			goto failed;
		}
		data = hw->priv;
907 908
		data->hw = hw;

909 910
		data->dev = device_create(hwsim_class, NULL, 0, hw,
					  "hwsim%d", i);
911
		if (IS_ERR(data->dev)) {
912
			printk(KERN_DEBUG
913
			       "mac80211_hwsim: device_create "
914 915
			       "failed (%ld)\n", PTR_ERR(data->dev));
			err = -ENOMEM;
916
			goto failed_drvdata;
917 918 919 920 921 922 923 924 925
		}
		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;
926
		hw->queues = 4;
927 928
		hw->wiphy->interface_modes =
			BIT(NL80211_IFTYPE_STATION) |
929 930
			BIT(NL80211_IFTYPE_AP) |
			BIT(NL80211_IFTYPE_MESH_POINT);
931

932 933
		hw->flags = IEEE80211_HW_MFP_CAPABLE;

934 935
		/* ask mac80211 to reserve space for magic */
		hw->vif_data_size = sizeof(struct hwsim_vif_priv);
936
		hw->sta_data_size = sizeof(struct hwsim_sta_priv);
937

938 939 940 941
		memcpy(data->channels_2ghz, hwsim_channels_2ghz,
			sizeof(hwsim_channels_2ghz));
		memcpy(data->channels_5ghz, hwsim_channels_5ghz,
			sizeof(hwsim_channels_5ghz));
942
		memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978

		for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
			struct ieee80211_supported_band *sband = &data->bands[band];
			switch (band) {
			case IEEE80211_BAND_2GHZ:
				sband->channels = data->channels_2ghz;
				sband->n_channels =
					ARRAY_SIZE(hwsim_channels_2ghz);
				break;
			case IEEE80211_BAND_5GHZ:
				sband->channels = data->channels_5ghz;
				sband->n_channels =
					ARRAY_SIZE(hwsim_channels_5ghz);
				break;
			default:
				break;
			}

			sband->bitrates = data->rates;
			sband->n_bitrates = ARRAY_SIZE(hwsim_rates);

			sband->ht_cap.ht_supported = true;
			sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
				IEEE80211_HT_CAP_GRN_FLD |
				IEEE80211_HT_CAP_SGI_40 |
				IEEE80211_HT_CAP_DSSSCCK40;
			sband->ht_cap.ampdu_factor = 0x3;
			sband->ht_cap.ampdu_density = 0x6;
			memset(&sband->ht_cap.mcs, 0,
			       sizeof(sband->ht_cap.mcs));
			sband->ht_cap.mcs.rx_mask[0] = 0xff;
			sband->ht_cap.mcs.rx_mask[1] = 0xff;
			sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;

			hw->wiphy->bands[band] = sband;
		}
979

980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 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 1031 1032 1033 1034 1035 1036 1037
		/* Work to be done prior to ieee80211_register_hw() */
		switch (regtest) {
		case HWSIM_REGTEST_DISABLED:
		case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
		case HWSIM_REGTEST_DRIVER_REG_ALL:
		case HWSIM_REGTEST_DIFF_COUNTRY:
			/*
			 * Nothing to be done for driver regulatory domain
			 * hints prior to ieee80211_register_hw()
			 */
			break;
		case HWSIM_REGTEST_WORLD_ROAM:
			if (i == 0) {
				hw->wiphy->custom_regulatory = true;
				wiphy_apply_custom_regulatory(hw->wiphy,
					&hwsim_world_regdom_custom_01);
			}
			break;
		case HWSIM_REGTEST_CUSTOM_WORLD:
			hw->wiphy->custom_regulatory = true;
			wiphy_apply_custom_regulatory(hw->wiphy,
				&hwsim_world_regdom_custom_01);
			break;
		case HWSIM_REGTEST_CUSTOM_WORLD_2:
			if (i == 0) {
				hw->wiphy->custom_regulatory = true;
				wiphy_apply_custom_regulatory(hw->wiphy,
					&hwsim_world_regdom_custom_01);
			} else if (i == 1) {
				hw->wiphy->custom_regulatory = true;
				wiphy_apply_custom_regulatory(hw->wiphy,
					&hwsim_world_regdom_custom_02);
			}
			break;
		case HWSIM_REGTEST_STRICT_ALL:
			hw->wiphy->strict_regulatory = true;
			break;
		case HWSIM_REGTEST_STRICT_FOLLOW:
		case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
			if (i == 0)
				hw->wiphy->strict_regulatory = true;
			break;
		case HWSIM_REGTEST_ALL:
			if (i == 0) {
				hw->wiphy->custom_regulatory = true;
				wiphy_apply_custom_regulatory(hw->wiphy,
					&hwsim_world_regdom_custom_01);
			} else if (i == 1) {
				hw->wiphy->custom_regulatory = true;
				wiphy_apply_custom_regulatory(hw->wiphy,
					&hwsim_world_regdom_custom_02);
			} else if (i == 4)
				hw->wiphy->strict_regulatory = true;
			break;
		default:
			break;
		}

1038 1039 1040
		/* give the regulatory workqueue a chance to run */
		if (regtest)
			schedule_timeout_interruptible(1);
1041 1042 1043 1044
		err = ieee80211_register_hw(hw);
		if (err < 0) {
			printk(KERN_DEBUG "mac80211_hwsim: "
			       "ieee80211_register_hw failed (%d)\n", err);
1045
			goto failed_hw;
1046 1047
		}

1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093
		/* Work to be done after to ieee80211_register_hw() */
		switch (regtest) {
		case HWSIM_REGTEST_WORLD_ROAM:
		case HWSIM_REGTEST_DISABLED:
			break;
		case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
			if (!i)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
			break;
		case HWSIM_REGTEST_DRIVER_REG_ALL:
		case HWSIM_REGTEST_STRICT_ALL:
			regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
			break;
		case HWSIM_REGTEST_DIFF_COUNTRY:
			if (i < ARRAY_SIZE(hwsim_alpha2s))
				regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
			break;
		case HWSIM_REGTEST_CUSTOM_WORLD:
		case HWSIM_REGTEST_CUSTOM_WORLD_2:
			/*
			 * Nothing to be done for custom world regulatory
			 * domains after to ieee80211_register_hw
			 */
			break;
		case HWSIM_REGTEST_STRICT_FOLLOW:
			if (i == 0)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
			break;
		case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
			if (i == 0)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
			else if (i == 1)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
			break;
		case HWSIM_REGTEST_ALL:
			if (i == 2)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
			else if (i == 3)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
			else if (i == 4)
				regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
			break;
		default:
			break;
		}

J
Johannes Berg 已提交
1094
		printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1095
		       wiphy_name(hw->wiphy),
J
Johannes Berg 已提交
1096
		       hw->wiphy->perm_addr);
1097

1098 1099 1100 1101 1102 1103
		data->debugfs = debugfs_create_dir("hwsim",
						   hw->wiphy->debugfsdir);
		data->debugfs_ps = debugfs_create_file("ps", 0666,
						       data->debugfs, data,
						       &hwsim_fops_ps);

1104 1105
		setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
			    (unsigned long) hw);
1106 1107

		list_add_tail(&data->list, &hwsim_radios);
1108 1109 1110 1111 1112 1113 1114 1115 1116
	}

	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);
1117
	if (err < 0)
1118
		goto failed_mon;
1119

1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131

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

	rtnl_unlock();

	return 0;

failed_mon:
	rtnl_unlock();
	free_netdev(hwsim_mon);
1132 1133
	mac80211_hwsim_free();
	return err;
1134

1135 1136 1137 1138
failed_hw:
	device_unregister(data->dev);
failed_drvdata:
	ieee80211_free_hw(hw);
1139 1140 1141 1142 1143 1144 1145 1146
failed:
	mac80211_hwsim_free();
	return err;
}


static void __exit exit_mac80211_hwsim(void)
{
1147
	printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1148 1149 1150 1151 1152 1153 1154 1155

	unregister_netdev(hwsim_mon);
	mac80211_hwsim_free();
}


module_init(init_mac80211_hwsim);
module_exit(exit_mac80211_hwsim);