path: root/net/mac80211/cfg.c

/*
 * 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 "rate.h"
#include "mesh.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;
#ifdef CONFIG_MAC80211_MESH
	case NL80211_IFTYPE_MESH_POINT:
		return IEEE80211_IF_TYPE_MESH_POINT;
#endif
	case NL80211_IFTYPE_WDS:
		return IEEE80211_IF_TYPE_WDS;
	default:
		return IEEE80211_IF_TYPE_INVALID;
	}
}

static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
			       enum nl80211_iftype type, u32 *flags,
			       struct vif_params *params)
{
	struct ieee80211_local *local = wiphy_priv(wiphy);
	enum ieee80211_if_types itype;
	struct net_device *dev;
	struct ieee80211_sub_if_data *sdata;
	int err;

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

	err = ieee80211_if_add(local, name, &dev, itype, params);
	if (err || itype != IEEE80211_IF_TYPE_MNTR || !flags)
		return err;

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	sdata->u.mntr_flags = *flags;
	return 0;
}

static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
{
	struct net_device *dev;

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

	ieee80211_if_remove(dev);

	return 0;
}

static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
				  enum nl80211_iftype type, u32 *flags,
				  struct vif_params *params)
{
	struct net_device *dev;
	enum ieee80211_if_types itype;
	struct ieee80211_sub_if_data *sdata;
	int ret;

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

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

	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	ret = ieee80211_if_change_type(sdata, itype);
	if (ret)
		return ret;

	if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
		ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
					     params->mesh_id_len,
					     params->mesh_id);

	if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || !flags)
		return 0;

	sdata->u.mntr_flags = *flags;
	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;
	struct ieee80211_key *key;
	int err;

	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;
	}

	key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
	if (!key)
		return -ENOMEM;

	rcu_read_lock();

	if (mac_addr) {
		sta = sta_info_get(sdata->local, mac_addr);
		if (!sta) {
			ieee80211_key_free(key);
			err = -ENOENT;
			goto out_unlock;
		}
	}

	ieee80211_key_link(key, sdata, sta);

	err = 0;
 out_unlock:
	rcu_read_unlock();

	return err;
}

static int ieee80211_del_key(struct wiphy