net/mac80211/cfg.c - kernel/msm-4.9 - Gitiles

 /*
  * mac80211 configuration hooks for cfg80211
  *
  * Copyright 2006, 2007	Johannes Berg <johannes@sipsolutions.net>
  *
  * This file is GPLv2 as found in COPYING.
  */

 #include <linux/ieee80211.h>
 #include <linux/nl80211.h>
 #include <linux/rtnetlink.h>
 #include <net/net_namespace.h>
 #include <linux/rcupdate.h>
 #include <net/cfg80211.h>
 #include "ieee80211_i.h"
 #include "cfg.h"
 #include "ieee80211_rate.h"

 static enum ieee80211_if_types
 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
 {
 	switch (type) {
 	case NL80211_IFTYPE_UNSPECIFIED:
 		return IEEE80211_IF_TYPE_STA;
 	case NL80211_IFTYPE_ADHOC:
 		return IEEE80211_IF_TYPE_IBSS;
 	case NL80211_IFTYPE_STATION:
 		return IEEE80211_IF_TYPE_STA;
 	case NL80211_IFTYPE_MONITOR:
 		return IEEE80211_IF_TYPE_MNTR;
 	default:
 		return IEEE80211_IF_TYPE_INVALID;
 	}
 }

 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
 			       enum nl80211_iftype type)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
 	enum ieee80211_if_types itype;

 	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
 		return -ENODEV;

 	itype = nl80211_type_to_mac80211_type(type);
 	if (itype == IEEE80211_IF_TYPE_INVALID)
 		return -EINVAL;

 	return ieee80211_if_add(local->mdev, name, NULL, itype);
 }

 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
 	struct net_device *dev;
 	char *name;

 	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
 		return -ENODEV;

 	/* we're under RTNL */
 	dev = __dev_get_by_index(&init_net, ifindex);
 	if (!dev)
 		return 0;

 	name = dev->name;

 	return ieee80211_if_remove(local->mdev, name, -1);
 }

 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
 				  enum nl80211_iftype type)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
 	struct net_device *dev;
 	enum ieee80211_if_types itype;
 	struct ieee80211_sub_if_data *sdata;

 	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
 		return -ENODEV;

 	/* we're under RTNL */
 	dev = __dev_get_by_index(&init_net, ifindex);
 	if (!dev)
 		return -ENODEV;

 	if (netif_running(dev))
 		return -EBUSY;

 	itype = nl80211_type_to_mac80211_type(type);
 	if (itype == IEEE80211_IF_TYPE_INVALID)
 		return -EINVAL;

 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

 	if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
 		return -EOPNOTSUPP;

 	ieee80211_if_reinit(dev);
 	ieee80211_if_set_type(dev, itype);

 	return 0;
 }

 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 			     u8 key_idx, u8 *mac_addr,
 			     struct key_params *params)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta = NULL;
 	enum ieee80211_key_alg alg;
 	int ret;

 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

 	switch (params->cipher) {
 	case WLAN_CIPHER_SUITE_WEP40:
 	case WLAN_CIPHER_SUITE_WEP104:
 		alg = ALG_WEP;
 		break;
 	case WLAN_CIPHER_SUITE_TKIP:
 		alg = ALG_TKIP;
 		break;
 	case WLAN_CIPHER_SUITE_CCMP:
 		alg = ALG_CCMP;
 		break;
 	default:
 		return -EINVAL;
 	}

 	if (mac_addr) {
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta)
 			return -ENOENT;
 	}

 	ret = 0;
 	if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
 				 params->key_len, params->key))
 		ret = -ENOMEM;

 	if (sta)
 		sta_info_put(sta);

 	return ret;
 }

 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 			     u8 key_idx, u8 *mac_addr)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta;
 	int ret;

 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

 	if (mac_addr) {
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta)
 			return -ENOENT;

 		ret = 0;
 		if (sta->key)
 			ieee80211_key_free(sta->key);
 		else
 			ret = -ENOENT;

 		sta_info_put(sta);
 		return ret;
 	}

 	if (!sdata->keys[key_idx])
 		return -ENOENT;

 	ieee80211_key_free(sdata->keys[key_idx]);

 	return 0;
 }

 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 			     u8 key_idx, u8 *mac_addr, void *cookie,
 			     void (*callback)(void *cookie,
 					      struct key_params *params))
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct sta_info *sta = NULL;
 	u8 seq[6] = {0};
 	struct key_params params;
 	struct ieee80211_key *key;
 	u32 iv32;
 	u16 iv16;
 	int err = -ENOENT;

 	if (mac_addr) {
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta)
 			goto out;

 		key = sta->key;
 	} else
 		key = sdata->keys[key_idx];

 	if (!key)
 		goto out;

 	memset(&params, 0, sizeof(params));

 	switch (key->conf.alg) {
 	case ALG_TKIP:
 		params.cipher = WLAN_CIPHER_SUITE_TKIP;

 		iv32 = key->u.tkip.iv32;
 		iv16 = key->u.tkip.iv16;

 		if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 		    sdata->local->ops->get_tkip_seq)
 			sdata->local->ops->get_tkip_seq(
 				local_to_hw(sdata->local),
 				key->conf.hw_key_idx,
 				&iv32, &iv16);

 		seq[0] = iv16 & 0xff;
 		seq[1] = (iv16 >> 8) & 0xff;
 		seq[2] = iv32 & 0xff;
 		seq[3] = (iv32 >> 8) & 0xff;
 		seq[4] = (iv32 >> 16) & 0xff;
 		seq[5] = (iv32 >> 24) & 0xff;
 		params.seq = seq;
 		params.seq_len = 6;
 		break;
 	case ALG_CCMP:
 		params.cipher = WLAN_CIPHER_SUITE_CCMP;
 		seq[0] = key->u.ccmp.tx_pn[5];
 		seq[1] = key->u.ccmp.tx_pn[4];
 		seq[2] = key->u.ccmp.tx_pn[3];
 		seq[3] = key->u.ccmp.tx_pn[2];
 		seq[4] = key->u.ccmp.tx_pn[1];
 		seq[5] = key->u.ccmp.tx_pn[0];
 		params.seq = seq;
 		params.seq_len = 6;
 		break;
 	case ALG_WEP:
 		if (key->conf.keylen == 5)
 			params.cipher = WLAN_CIPHER_SUITE_WEP40;
 		else
 			params.cipher = WLAN_CIPHER_SUITE_WEP104;
 		break;
 	}

 	params.key = key->conf.key;
 	params.key_len = key->conf.keylen;

 	callback(cookie, &params);
 	err = 0;

  out:
 	if (sta)
 		sta_info_put(sta);
 	return err;
 }

 static int ieee80211_config_default_key(struct wiphy *wiphy,
 					struct net_device *dev,
 					u8 key_idx)
 {
 	struct ieee80211_sub_if_data *sdata;

 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	ieee80211_set_default_key(sdata, key_idx);

 	return 0;
 }

 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 				 u8 *mac, struct station_stats *stats)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct sta_info *sta;

 	sta = sta_info_get(local, mac);
 	if (!sta)
 		return -ENOENT;

 	/* XXX: verify sta->dev == dev */

 	stats->filled = STATION_STAT_INACTIVE_TIME |
 			STATION_STAT_RX_BYTES |
 			STATION_STAT_TX_BYTES;

 	stats->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 	stats->rx_bytes = sta->rx_bytes;
 	stats->tx_bytes = sta->tx_bytes;

 	sta_info_put(sta);

 	return 0;
 }

 /*
  * This handles both adding a beacon and setting new beacon info
  */
 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 				   struct beacon_parameters *params)
 {
 	struct beacon_data *new, *old;
 	int new_head_len, new_tail_len;
 	int size;
 	int err = -EINVAL;

 	old = sdata->u.ap.beacon;

 	/* head must not be zero-length */
 	if (params->head && !params->head_len)
 		return -EINVAL;

 	/*
 	 * This is a kludge. beacon interval should really be part
 	 * of the beacon information.
 	 */
 	if (params->interval) {
 		sdata->local->hw.conf.beacon_int = params->interval;
 		if (ieee80211_hw_config(sdata->local))
 			return -EINVAL;
 		/*
 		 * We updated some parameter so if below bails out
 		 * it's not an error.
 		 */
 		err = 0;
 	}

 	/* Need to have a beacon head if we don't have one yet */
 	if (!params->head && !old)
 		return err;

 	/* sorry, no way to start beaconing without dtim period */
 	if (!params->dtim_period && !old)
 		return err;

 	/* new or old head? */
 	if (params->head)
 		new_head_len = params->head_len;
 	else
 		new_head_len = old->head_len;

 	/* new or old tail? */
 	if (params->tail || !old)
 		/* params->tail_len will be zero for !params->tail */
 		new_tail_len = params->tail_len;
 	else
 		new_tail_len = old->tail_len;

 	size = sizeof(*new) + new_head_len + new_tail_len;

 	new = kzalloc(size, GFP_KERNEL);
 	if (!new)
 		return -ENOMEM;

 	/* start filling the new info now */

 	/* new or old dtim period? */
 	if (params->dtim_period)
 		new->dtim_period = params->dtim_period;
 	else
 		new->dtim_period = old->dtim_period;

 	/*
 	 * pointers go into the block we allocated,
 	 * memory is | beacon_data | head | tail |
 	 */
 	new->head = ((u8 *) new) + sizeof(*new);
 	new->tail = new->head + new_head_len;
 	new->head_len = new_head_len;
 	new->tail_len = new_tail_len;

 	/* copy in head */
 	if (params->head)
 		memcpy(new->head, params->head, new_head_len);
 	else
 		memcpy(new->head, old->head, new_head_len);

 	/* copy in optional tail */
 	if (params->tail)
 		memcpy(new->tail, params->tail, new_tail_len);
 	else
 		if (old)
 			memcpy(new->tail, old->tail, new_tail_len);

 	rcu_assign_pointer(sdata->u.ap.beacon, new);

 	synchronize_rcu();

 	kfree(old);

 	return ieee80211_if_config_beacon(sdata->dev);
 }

 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 				struct beacon_parameters *params)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct beacon_data *old;

 	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 		return -EINVAL;

 	old = sdata->u.ap.beacon;

 	if (old)
 		return -EALREADY;

 	return ieee80211_config_beacon(sdata, params);
 }

 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 				struct beacon_parameters *params)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct beacon_data *old;

 	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 		return -EINVAL;

 	old = sdata->u.ap.beacon;

 	if (!old)
 		return -ENOENT;

 	return ieee80211_config_beacon(sdata, params);
 }

 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct beacon_data *old;

 	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 		return -EINVAL;

 	old = sdata->u.ap.beacon;

 	if (!old)
 		return -ENOENT;

 	rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 	synchronize_rcu();
 	kfree(old);

 	return ieee80211_if_config_beacon(dev);
 }

 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 struct iapp_layer2_update {
 	u8 da[ETH_ALEN];	/* broadcast */
 	u8 sa[ETH_ALEN];	/* STA addr */
 	__be16 len;		/* 6 */
 	u8 dsap;		/* 0 */
 	u8 ssap;		/* 0 */
 	u8 control;
 	u8 xid_info[3];
 } __attribute__ ((packed));

 static void ieee80211_send_layer2_update(struct sta_info *sta)
 {
 	struct iapp_layer2_update *msg;
 	struct sk_buff *skb;

 	/* Send Level 2 Update Frame to update forwarding tables in layer 2
 	 * bridge devices */

 	skb = dev_alloc_skb(sizeof(*msg));
 	if (!skb)
 		return;
 	msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));

 	/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 	 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */

 	memset(msg->da, 0xff, ETH_ALEN);
 	memcpy(msg->sa, sta->addr, ETH_ALEN);
 	msg->len = htons(6);
 	msg->dsap = 0;
 	msg->ssap = 0x01;	/* NULL LSAP, CR Bit: Response */
 	msg->control = 0xaf;	/* XID response lsb.1111F101.
 				 * F=0 (no poll command; unsolicited frame) */
 	msg->xid_info[0] = 0x81;	/* XID format identifier */
 	msg->xid_info[1] = 1;	/* LLC types/classes: Type 1 LLC */
 	msg->xid_info[2] = 0;	/* XID sender's receive window size (RW) */

 	skb->dev = sta->dev;
 	skb->protocol = eth_type_trans(skb, sta->dev);
 	memset(skb->cb, 0, sizeof(skb->cb));
 	netif_rx(skb);
 }

 static void sta_apply_parameters(struct ieee80211_local *local,
 				 struct sta_info *sta,
 				 struct station_parameters *params)
 {
 	u32 rates;
 	int i, j;
 	struct ieee80211_hw_mode *mode;

 	if (params->station_flags & STATION_FLAG_CHANGED) {
 		sta->flags &= ~WLAN_STA_AUTHORIZED;
 		if (params->station_flags & STATION_FLAG_AUTHORIZED)
 			sta->flags |= WLAN_STA_AUTHORIZED;

 		sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 		if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 			sta->flags |= WLAN_STA_SHORT_PREAMBLE;

 		sta->flags &= ~WLAN_STA_WME;
 		if (params->station_flags & STATION_FLAG_WME)
 			sta->flags |= WLAN_STA_WME;
 	}

 	if (params->aid) {
 		sta->aid = params->aid;
 		if (sta->aid > IEEE80211_MAX_AID)
 			sta->aid = 0; /* XXX: should this be an error? */
 	}

 	if (params->listen_interval >= 0)
 		sta->listen_interval = params->listen_interval;

 	if (params->supported_rates) {
 		rates = 0;
 		mode = local->oper_hw_mode;
 		for (i = 0; i < params->supported_rates_len; i++) {
 			int rate = (params->supported_rates[i] & 0x7f) * 5;
 			for (j = 0; j < mode->num_rates; j++) {
 				if (mode->rates[j].rate == rate)
 					rates |= BIT(j);
 			}
 		}
 		sta->supp_rates = rates;
 	}
 }

 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 				 u8 *mac, struct station_parameters *params)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct sta_info *sta;
 	struct ieee80211_sub_if_data *sdata;

 	/* Prevent a race with changing the rate control algorithm */
 	if (!netif_running(dev))
 		return -ENETDOWN;

 	/* XXX: get sta belonging to dev */
 	sta = sta_info_get(local, mac);
 	if (sta) {
 		sta_info_put(sta);
 		return -EEXIST;
 	}

 	if (params->vlan) {
 		sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

 		if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
 		    sdata->vif.type != IEEE80211_IF_TYPE_AP)
 			return -EINVAL;
 	} else
 		sdata = IEEE80211_DEV_TO_SUB_IF(dev);

 	sta = sta_info_add(local, dev, mac, GFP_KERNEL);
 	if (!sta)
 		return -ENOMEM;

 	sta->dev = sdata->dev;
 	if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN ||
 	    sdata->vif.type == IEEE80211_IF_TYPE_AP)
 		ieee80211_send_layer2_update(sta);

 	sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;

 	sta_apply_parameters(local, sta, params);

 	rate_control_rate_init(sta, local);

 	sta_info_put(sta);

 	return 0;
 }

 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 				 u8 *mac)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct sta_info *sta;

 	if (mac) {
 		/* XXX: get sta belonging to dev */
 		sta = sta_info_get(local, mac);
 		if (!sta)
 			return -ENOENT;

 		sta_info_free(sta);
 		sta_info_put(sta);
 	} else
 		sta_info_flush(local, dev);

 	return 0;
 }

 static int ieee80211_change_station(struct wiphy *wiphy,
 				    struct net_device *dev,
 				    u8 *mac,
 				    struct station_parameters *params)
 {
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct sta_info *sta;
 	struct ieee80211_sub_if_data *vlansdata;

 	/* XXX: get sta belonging to dev */
 	sta = sta_info_get(local, mac);
 	if (!sta)
 		return -ENOENT;

 	if (params->vlan && params->vlan != sta->dev) {
 		vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

 		if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
 		    vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
 			return -EINVAL;

 		sta->dev = params->vlan;
 		ieee80211_send_layer2_update(sta);
 	}

 	sta_apply_parameters(local, sta, params);

 	sta_info_put(sta);

 	return 0;
 }

 struct cfg80211_ops mac80211_config_ops = {
 	.add_virtual_intf = ieee80211_add_iface,
 	.del_virtual_intf = ieee80211_del_iface,
 	.change_virtual_intf = ieee80211_change_iface,
 	.add_key = ieee80211_add_key,
 	.del_key = ieee80211_del_key,
 	.get_key = ieee80211_get_key,
 	.set_default_key = ieee80211_config_default_key,
 	.add_beacon = ieee80211_add_beacon,
 	.set_beacon = ieee80211_set_beacon,
 	.del_beacon = ieee80211_del_beacon,
 	.add_station = ieee80211_add_station,
 	.del_station = ieee80211_del_station,
 	.change_station = ieee80211_change_station,
 	.get_station = ieee80211_get_station,
 };
	/*
	* mac80211 configuration hooks for cfg80211
	*
	* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
	*
	* This file is GPLv2 as found in COPYING.
	*/

	#include <linux/ieee80211.h>
	#include <linux/nl80211.h>
	#include <linux/rtnetlink.h>
	#include <net/net_namespace.h>
	#include <linux/rcupdate.h>
	#include <net/cfg80211.h>
	#include "ieee80211_i.h"
	#include "cfg.h"
	#include "ieee80211_rate.h"

	static enum ieee80211_if_types
	nl80211_type_to_mac80211_type(enum nl80211_iftype type)
	{
	switch (type) {
	case NL80211_IFTYPE_UNSPECIFIED:
	return IEEE80211_IF_TYPE_STA;
	case NL80211_IFTYPE_ADHOC:
	return IEEE80211_IF_TYPE_IBSS;
	case NL80211_IFTYPE_STATION:
	return IEEE80211_IF_TYPE_STA;
	case NL80211_IFTYPE_MONITOR:
	return IEEE80211_IF_TYPE_MNTR;
	default:
	return IEEE80211_IF_TYPE_INVALID;
	}
	}

	static int ieee80211_add_iface(struct wiphy wiphy, char name,
	enum nl80211_iftype type)
	{
	struct ieee80211_local *local = wiphy_priv(wiphy);
	enum ieee80211_if_types itype;

	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
	return -ENODEV;

	itype = nl80211_type_to_mac80211_type(type);
	if (itype == IEEE80211_IF_TYPE_INVALID)
	return -EINVAL;

	return ieee80211_if_add(local->mdev, name, NULL, itype);
	}

	static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
	{
	struct ieee80211_local *local = wiphy_priv(wiphy);
	struct net_device *dev;
	char *name;

	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
	return -ENODEV;

	/* we're under RTNL */
	dev = __dev_get_by_index(&init_net, ifindex);
	if (!dev)
	return 0;

	name = dev->name;

	return ieee80211_if_remove(local->mdev, name, -1);
	}

	static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
	enum nl80211_iftype type)
	{
	struct ieee80211_local *local = wiphy_priv(wiphy);
	struct net_device *dev;
	enum ieee80211_if_types itype;
	struct ieee80211_sub_if_data *sdata;

	if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
	return -ENODEV;

	/* we're under RTNL */
	dev = __dev_get_by_index(&init_net, ifindex);
	if (!dev)
	return -ENODEV;

	if (netif_running(dev))
	return -EBUSY;

	itype = nl80211_type_to_mac80211_type(type);
	if (itype == IEEE80211_IF_TYPE_INVALID)
	return -EINVAL;

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
	return -EOPNOTSUPP;

	ieee80211_if_reinit(dev);
	ieee80211_if_set_type(dev, itype);

	return 0;
	}

	static int ieee80211_add_key(struct wiphy wiphy, struct net_device dev,
	u8 key_idx, u8 *mac_addr,
	struct key_params *params)
	{
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta = NULL;
	enum ieee80211_key_alg alg;
	int ret;

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	switch (params->cipher) {
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
	alg = ALG_WEP;
	break;
	case WLAN_CIPHER_SUITE_TKIP:
	alg = ALG_TKIP;
	break;
	case WLAN_CIPHER_SUITE_CCMP:
	alg = ALG_CCMP;
	break;
	default:
	return -EINVAL;
	}

	if (mac_addr) {
	sta = sta_info_get(sdata->local, mac_addr);
	if (!sta)
	return -ENOENT;
	}

	ret = 0;
	if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
	params->key_len, params->key))
	ret = -ENOMEM;

	if (sta)
	sta_info_put(sta);

	return ret;
	}

	static int ieee80211_del_key(struct wiphy wiphy, struct net_device dev,
	u8 key_idx, u8 *mac_addr)
	{
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;
	int ret;

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	if (mac_addr) {
	sta = sta_info_get(sdata->local, mac_addr);
	if (!sta)
	return -ENOENT;

	ret = 0;
	if (sta->key)
	ieee80211_key_free(sta->key);
	else
	ret = -ENOENT;

	sta_info_put(sta);
	return ret;
	}

	if (!sdata->keys[key_idx])
	return -ENOENT;

	ieee80211_key_free(sdata->keys[key_idx]);

	return 0;
	}

	static int ieee80211_get_key(struct wiphy wiphy, struct net_device dev,
	u8 key_idx, u8 mac_addr, void cookie,
	void (callback)(void cookie,
	struct key_params *params))
	{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct sta_info *sta = NULL;
	u8 seq[6] = {0};
	struct key_params params;
	struct ieee80211_key *key;
	u32 iv32;
	u16 iv16;
	int err = -ENOENT;

	if (mac_addr) {
	sta = sta_info_get(sdata->local, mac_addr);
	if (!sta)
	goto out;

	key = sta->key;
	} else
	key = sdata->keys[key_idx];

	if (!key)
	goto out;

	memset(&params, 0, sizeof(params));

	switch (key->conf.alg) {
	case ALG_TKIP:
	params.cipher = WLAN_CIPHER_SUITE_TKIP;

	iv32 = key->u.tkip.iv32;
	iv16 = key->u.tkip.iv16;

	if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
	sdata->local->ops->get_tkip_seq)
	sdata->local->ops->get_tkip_seq(
	local_to_hw(sdata->local),
	key->conf.hw_key_idx,
	&iv32, &iv16);

	seq[0] = iv16 & 0xff;
	seq[1] = (iv16 >> 8) & 0xff;
	seq[2] = iv32 & 0xff;
	seq[3] = (iv32 >> 8) & 0xff;
	seq[4] = (iv32 >> 16) & 0xff;
	seq[5] = (iv32 >> 24) & 0xff;
	params.seq = seq;
	params.seq_len = 6;
	break;
	case ALG_CCMP:
	params.cipher = WLAN_CIPHER_SUITE_CCMP;
	seq[0] = key->u.ccmp.tx_pn[5];
	seq[1] = key->u.ccmp.tx_pn[4];
	seq[2] = key->u.ccmp.tx_pn[3];
	seq[3] = key->u.ccmp.tx_pn[2];
	seq[4] = key->u.ccmp.tx_pn[1];
	seq[5] = key->u.ccmp.tx_pn[0];
	params.seq = seq;
	params.seq_len = 6;
	break;
	case ALG_WEP:
	if (key->conf.keylen == 5)
	params.cipher = WLAN_CIPHER_SUITE_WEP40;
	else
	params.cipher = WLAN_CIPHER_SUITE_WEP104;
	break;
	}

	params.key = key->conf.key;
	params.key_len = key->conf.keylen;

	callback(cookie, &params);
	err = 0;

	out:
	if (sta)
	sta_info_put(sta);
	return err;
	}

	static int ieee80211_config_default_key(struct wiphy *wiphy,
	struct net_device *dev,
	u8 key_idx)
	{
	struct ieee80211_sub_if_data *sdata;

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	ieee80211_set_default_key(sdata, key_idx);

	return 0;
	}

	static int ieee80211_get_station(struct wiphy wiphy, struct net_device dev,
	u8 mac, struct station_stats stats)
	{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct sta_info *sta;

	sta = sta_info_get(local, mac);
	if (!sta)
	return -ENOENT;

	/* XXX: verify sta->dev == dev */

	stats->filled = STATION_STAT_INACTIVE_TIME \|
	STATION_STAT_RX_BYTES \|
	STATION_STAT_TX_BYTES;

	stats->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
	stats->rx_bytes = sta->rx_bytes;
	stats->tx_bytes = sta->tx_bytes;

	sta_info_put(sta);

	return 0;
	}

	/*
	* This handles both adding a beacon and setting new beacon info
	*/
	static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
	struct beacon_parameters *params)
	{
	struct beacon_data new, old;
	int new_head_len, new_tail_len;
	int size;
	int err = -EINVAL;

	old = sdata->u.ap.beacon;

	/* head must not be zero-length */
	if (params->head && !params->head_len)
	return -EINVAL;

	/*
	* This is a kludge. beacon interval should really be part
	* of the beacon information.
	*/
	if (params->interval) {
	sdata->local->hw.conf.beacon_int = params->interval;
	if (ieee80211_hw_config(sdata->local))
	return -EINVAL;
	/*
	* We updated some parameter so if below bails out
	* it's not an error.
	*/
	err = 0;
	}

	/* Need to have a beacon head if we don't have one yet */
	if (!params->head && !old)
	return err;

	/* sorry, no way to start beaconing without dtim period */
	if (!params->dtim_period && !old)
	return err;

	/* new or old head? */
	if (params->head)
	new_head_len = params->head_len;
	else
	new_head_len = old->head_len;

	/* new or old tail? */
	if (params->tail \|\| !old)
	/* params->tail_len will be zero for !params->tail */
	new_tail_len = params->tail_len;
	else
	new_tail_len = old->tail_len;

	size = sizeof(*new) + new_head_len + new_tail_len;

	new = kzalloc(size, GFP_KERNEL);
	if (!new)
	return -ENOMEM;

	/* start filling the new info now */

	/* new or old dtim period? */
	if (params->dtim_period)
	new->dtim_period = params->dtim_period;
	else
	new->dtim_period = old->dtim_period;

	/*
	* pointers go into the block we allocated,
	* memory is \| beacon_data \| head \| tail \|
	*/
	new->head = ((u8 ) new) + sizeof(new);
	new->tail = new->head + new_head_len;
	new->head_len = new_head_len;
	new->tail_len = new_tail_len;

	/* copy in head */
	if (params->head)
	memcpy(new->head, params->head, new_head_len);
	else
	memcpy(new->head, old->head, new_head_len);

	/* copy in optional tail */
	if (params->tail)
	memcpy(new->tail, params->tail, new_tail_len);
	else
	if (old)
	memcpy(new->tail, old->tail, new_tail_len);

	rcu_assign_pointer(sdata->u.ap.beacon, new);

	synchronize_rcu();

	kfree(old);

	return ieee80211_if_config_beacon(sdata->dev);
	}

	static int ieee80211_add_beacon(struct wiphy wiphy, struct net_device dev,
	struct beacon_parameters *params)
	{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct beacon_data *old;

	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
	return -EINVAL;

	old = sdata->u.ap.beacon;

	if (old)
	return -EALREADY;

	return ieee80211_config_beacon(sdata, params);
	}

	static int ieee80211_set_beacon(struct wiphy wiphy, struct net_device dev,
	struct beacon_parameters *params)
	{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct beacon_data *old;

	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
	return -EINVAL;

	old = sdata->u.ap.beacon;

	if (!old)
	return -ENOENT;

	return ieee80211_config_beacon(sdata, params);
	}

	static int ieee80211_del_beacon(struct wiphy wiphy, struct net_device dev)
	{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct beacon_data *old;

	if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
	return -EINVAL;

	old = sdata->u.ap.beacon;

	if (!old)
	return -ENOENT;

	rcu_assign_pointer(sdata->u.ap.beacon, NULL);
	synchronize_rcu();
	kfree(old);

	return ieee80211_if_config_beacon(dev);
	}

	/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
	struct iapp_layer2_update {
	u8 da[ETH_ALEN]; /* broadcast */
	u8 sa[ETH_ALEN]; /* STA addr */
	__be16 len; /* 6 */
	u8 dsap; /* 0 */
	u8 ssap; /* 0 */
	u8 control;
	u8 xid_info[3];
	} __attribute__ ((packed));

	static void ieee80211_send_layer2_update(struct sta_info *sta)
	{
	struct iapp_layer2_update *msg;
	struct sk_buff *skb;

	/* Send Level 2 Update Frame to update forwarding tables in layer 2
	* bridge devices */

	skb = dev_alloc_skb(sizeof(*msg));
	if (!skb)
	return;
	msg = (struct iapp_layer2_update )skb_put(skb, sizeof(msg));

	/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
	* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */

	memset(msg->da, 0xff, ETH_ALEN);
	memcpy(msg->sa, sta->addr, ETH_ALEN);
	msg->len = htons(6);
	msg->dsap = 0;
	msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
	msg->control = 0xaf; /* XID response lsb.1111F101.
	* F=0 (no poll command; unsolicited frame) */
	msg->xid_info[0] = 0x81; /* XID format identifier */
	msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
	msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */

	skb->dev = sta->dev;
	skb->protocol = eth_type_trans(skb, sta->dev);
	memset(skb->cb, 0, sizeof(skb->cb));
	netif_rx(skb);
	}

	static void sta_apply_parameters(struct ieee80211_local *local,
	struct sta_info *sta,
	struct station_parameters *params)
	{
	u32 rates;
	int i, j;
	struct ieee80211_hw_mode *mode;

	if (params->station_flags & STATION_FLAG_CHANGED) {
	sta->flags &= ~WLAN_STA_AUTHORIZED;
	if (params->station_flags & STATION_FLAG_AUTHORIZED)
	sta->flags \|= WLAN_STA_AUTHORIZED;

	sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
	if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
	sta->flags \|= WLAN_STA_SHORT_PREAMBLE;

	sta->flags &= ~WLAN_STA_WME;
	if (params->station_flags & STATION_FLAG_WME)
	sta->flags \|= WLAN_STA_WME;
	}

	if (params->aid) {
	sta->aid = params->aid;
	if (sta->aid > IEEE80211_MAX_AID)
	sta->aid = 0; /* XXX: should this be an error? */
	}

	if (params->listen_interval >= 0)
	sta->listen_interval = params->listen_interval;

	if (params->supported_rates) {
	rates = 0;
	mode = local->oper_hw_mode;
	for (i = 0; i < params->supported_rates_len; i++) {
	int rate = (params->supported_rates[i] & 0x7f) * 5;
	for (j = 0; j < mode->num_rates; j++) {
	if (mode->rates[j].rate == rate)
	rates \|= BIT(j);
	}
	}
	sta->supp_rates = rates;
	}
	}

	static int ieee80211_add_station(struct wiphy wiphy, struct net_device dev,
	u8 mac, struct station_parameters params)
	{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct sta_info *sta;
	struct ieee80211_sub_if_data *sdata;

	/* Prevent a race with changing the rate control algorithm */
	if (!netif_running(dev))
	return -ENETDOWN;

	/* XXX: get sta belonging to dev */
	sta = sta_info_get(local, mac);
	if (sta) {
	sta_info_put(sta);
	return -EEXIST;
	}

	if (params->vlan) {
	sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

	if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN \|\|
	sdata->vif.type != IEEE80211_IF_TYPE_AP)
	return -EINVAL;
	} else
	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	sta = sta_info_add(local, dev, mac, GFP_KERNEL);
	if (!sta)
	return -ENOMEM;

	sta->dev = sdata->dev;
	if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN \|\|
	sdata->vif.type == IEEE80211_IF_TYPE_AP)
	ieee80211_send_layer2_update(sta);

	sta->flags = WLAN_STA_AUTH \| WLAN_STA_ASSOC;

	sta_apply_parameters(local, sta, params);

	rate_control_rate_init(sta, local);

	sta_info_put(sta);

	return 0;
	}

	static int ieee80211_del_station(struct wiphy wiphy, struct net_device dev,
	u8 *mac)
	{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct sta_info *sta;

	if (mac) {
	/* XXX: get sta belonging to dev */
	sta = sta_info_get(local, mac);
	if (!sta)
	return -ENOENT;

	sta_info_free(sta);
	sta_info_put(sta);
	} else
	sta_info_flush(local, dev);

	return 0;
	}

	static int ieee80211_change_station(struct wiphy *wiphy,
	struct net_device *dev,
	u8 *mac,
	struct station_parameters *params)
	{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
	struct sta_info *sta;
	struct ieee80211_sub_if_data *vlansdata;

	/* XXX: get sta belonging to dev */
	sta = sta_info_get(local, mac);
	if (!sta)
	return -ENOENT;

	if (params->vlan && params->vlan != sta->dev) {
	vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

	if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN \|\|
	vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
	return -EINVAL;

	sta->dev = params->vlan;
	ieee80211_send_layer2_update(sta);
	}

	sta_apply_parameters(local, sta, params);

	sta_info_put(sta);

	return 0;
	}

	struct cfg80211_ops mac80211_config_ops = {
	.add_virtual_intf = ieee80211_add_iface,
	.del_virtual_intf = ieee80211_del_iface,
	.change_virtual_intf = ieee80211_change_iface,
	.add_key = ieee80211_add_key,
	.del_key = ieee80211_del_key,
	.get_key = ieee80211_get_key,
	.set_default_key = ieee80211_config_default_key,
	.add_beacon = ieee80211_add_beacon,
	.set_beacon = ieee80211_set_beacon,
	.del_beacon = ieee80211_del_beacon,
	.add_station = ieee80211_add_station,
	.del_station = ieee80211_del_station,
	.change_station = ieee80211_change_station,
	.get_station = ieee80211_get_station,
	};