[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / l2tp / l2tp_eth.c

/*
 * L2TPv3 ethernet pseudowire driver
 *
 * Copyright (c) 2008,2009,2010 Katalix Systems Ltd
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/socket.h>
#include <linux/hash.h>
#include <linux/l2tp.h>
#include <linux/in.h>
#include <linux/etherdevice.h>
#include <linux/spinlock.h>
#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/udp.h>
#include <net/inet_common.h>
#include <net/inet_hashtables.h>
#include <net/tcp_states.h>
#include <net/protocol.h>
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>

#include "l2tp_core.h"

/* Default device name. May be overridden by name specified by user */
#define L2TP_ETH_DEV_NAME	"l2tpeth%d"

/* via netdev_priv() */
struct l2tp_eth {
	struct net_device	*dev;
	struct sock		*tunnel_sock;
	struct l2tp_session	*session;
	struct list_head	list;
	atomic_long_t		tx_bytes;
	atomic_long_t		tx_packets;
	atomic_long_t		rx_bytes;
	atomic_long_t		rx_packets;
	atomic_long_t		rx_errors;
};

/* via l2tp_session_priv() */
struct l2tp_eth_sess {
	struct net_device	*dev;
};

/* per-net private data for this module */
static unsigned int l2tp_eth_net_id;
struct l2tp_eth_net {
	struct list_head l2tp_eth_dev_list;
	spinlock_t l2tp_eth_lock;
};

static inline struct l2tp_eth_net *l2tp_eth_pernet(struct net *net)
{
	return net_generic(net, l2tp_eth_net_id);
}

static int l2tp_eth_dev_init(struct net_device *dev)
{
	struct l2tp_eth *priv = netdev_priv(dev);

	priv->dev = dev;
	eth_hw_addr_random(dev);
	memset(&dev->broadcast[0], 0xff, 6);

	return 0;
}

static void l2tp_eth_dev_uninit(struct net_device *dev)
{
	struct l2tp_eth *priv = netdev_priv(dev);
	struct l2tp_eth_net *pn = l2tp_eth_pernet(dev_net(dev));

	spin_lock(&pn->l2tp_eth_lock);
	list_del_init(&priv->list);
	spin_unlock(&pn->l2tp_eth_lock);
	dev_put(dev);
}

static int l2tp_eth_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct l2tp_eth *priv = netdev_priv(dev);
	struct l2tp_session *session = priv->session;

	atomic_long_add(skb->len, &priv->tx_bytes);
	atomic_long_inc(&priv->tx_packets);

	l2tp_xmit_skb(session, skb, session->hdr_len);

	return NETDEV_TX_OK;
}

static struct rtnl_link_stats64 *l2tp_eth_get_stats64(struct net_device *dev,
						      struct rtnl_link_stats64 *stats)
{
	struct l2tp_eth *priv = netdev_priv(dev);

	stats->tx_bytes   = atomic_long_read(&priv->tx_bytes);
	stats->tx_packets = atomic_long_read(&priv->tx_packets);
	stats->rx_bytes   = atomic_long_read(&priv->rx_bytes);
	stats->rx_packets = atomic_long_read(&priv->rx_packets);
	stats->rx_errors  = atomic_long_read(&priv->rx_errors);
	return stats;
}


static struct net_device_ops l2tp_eth_netdev_ops = {
	.ndo_init		= l2tp_eth_dev_init,
	.ndo_uninit		= l2tp_eth_dev_uninit,
	.ndo_start_xmit		= l2tp_eth_dev_xmit,
	.ndo_get_stats64	= l2tp_eth_get_stats64,
};

static void l2tp_eth_dev_setup(struct net_device *dev)
{
	ether_setup(dev);
	dev->priv_flags		&= ~IFF_TX_SKB_SHARING;
	dev->features		|= NETIF_F_LLTX;
	dev->netdev_ops		= &l2tp_eth_netdev_ops;
	dev->destructor		= free_netdev;
}

static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb, int data_len)
{
	struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
	struct net_device *dev = spriv->dev;
	struct l2tp_eth *priv = netdev_priv(dev);

	if (session->debug & L2TP_MSG_DATA) {
		unsigned int length;

		length = min(32u, skb->len);
		if (!pskb_may_pull(skb, length))
			goto error;

		pr_debug("%s: eth recv\n", session->name);
		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, skb->data, length);
	}

	if (!pskb_may_pull(skb, sizeof(ETH_HLEN)))
		goto error;

	secpath_reset(skb);

	/* checksums verified by L2TP */
	skb->ip_summed = CHECKSUM_NONE;

	skb_dst_drop(skb);
	nf_reset(skb);

	if (dev_forward_skb(dev, skb) == NET_RX_SUCCESS) {
		atomic_long_inc(&priv->rx_packets);
		atomic_long_add(data_len, &priv->rx_bytes);
	} else {
		atomic_long_inc(&priv->rx_errors);
	}
	return;

error:
	atomic_long_inc(&priv->rx_errors);
	kfree_skb(skb);
}

static void l2tp_eth_delete(struct l2tp_session *session)
{
	struct l2tp_eth_sess *spriv;
	struct net_device *dev;

	if (session) {
		spriv = l2tp_session_priv(session);
		dev = spriv->dev;
		if (dev) {
			unregister_netdev(dev);
			spriv->dev = NULL;
			module_put(THIS_MODULE);
		}
	}
}

#if defined(CONFIG_L2TP_DEBUGFS) || defined(CONFIG_L2TP_DEBUGFS_MODULE)
static void l2tp_eth_show(struct seq_file *m, void *arg)
{
	struct l2tp_session *session = arg;
	struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
	struct net_device *dev = spriv->dev;

	seq_printf(m, "   interface %s\n", dev->name);
}
#endif

static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
{
	struct net_device *dev;
	char name[IFNAMSIZ];
	struct l2tp_tunnel *tunnel;
	struct l2tp_session *session;
	struct l2tp_eth *priv;
	struct l2tp_eth_sess *spriv;
	int rc;
	struct l2tp_eth_net *pn;

	tunnel = l2tp_tunnel_find(net, tunnel_id);
	if (!tunnel) {
		rc = -ENODEV;
		goto out;
	}

	session = l2tp_session_find(net, tunnel, session_id);
	if (session) {
		rc = -EEXIST;
		goto out;
	}

	if (cfg->ifname) {
		dev = dev_get_by_name(net, cfg->ifname);
		if (dev) {
			dev_put(dev);
			rc = -EEXIST;
			goto out;
		}
		strlcpy(name, cfg->ifname, IFNAMSIZ);
	} else
		strcpy(name, L2TP_ETH_DEV_NAME);

	session = l2tp_session_create(sizeof(*spriv), tunnel, session_id,
				      peer_session_id, cfg);
	if (!session) {
		rc = -ENOMEM;
		goto out;
	}

	dev = alloc_netdev(sizeof(*priv), name, l2tp_eth_dev_setup);
	if (!dev) {
		rc = -ENOMEM;
		goto out_del_session;
	}

	dev_net_set(dev, net);
	if (session->mtu == 0)
		session->mtu = dev->mtu - session->hdr_len;
	dev->mtu = session->mtu;
	dev->needed_headroom += session->hdr_len;

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->session = session;
	INIT_LIST_HEAD(&priv->list);

	priv->tunnel_sock = tunnel->sock;
	session->recv_skb = l2tp_eth_dev_recv;
	session->session_close = l2tp_eth_delete;
#if defined(CONFIG_L2TP_DEBUGFS) || defined(CONFIG_L2TP_DEBUGFS_MODULE)
	session->show = l2tp_eth_show;
#endif

	spriv = l2tp_session_priv(session);
	spriv->dev = dev;

	rc = register_netdev(dev);
	if (rc < 0)
		goto out_del_dev;

	__module_get(THIS_MODULE);
	/* Must be done after register_netdev() */
	strlcpy(session->ifname, dev->name, IFNAMSIZ);

	dev_hold(dev);
	pn = l2tp_eth_pernet(dev_net(dev));
	spin_lock(&pn->l2tp_eth_lock);
	list_add(&priv->list, &pn->l2tp_eth_dev_list);
	spin_unlock(&pn->l2tp_eth_lock);

	return 0;

out_del_dev:
	free_netdev(dev);
out_del_session:
	l2tp_session_delete(session);
out:
	return rc;
}

static __net_init int l2tp_eth_init_net(struct net *net)
{
	struct l2tp_eth_net *pn = net_generic(net, l2tp_eth_net_id);

	INIT_LIST_HEAD(&pn->l2tp_eth_dev_list);
	spin_lock_init(&pn->l2tp_eth_lock);

	return 0;
}

static struct pernet_operations l2tp_eth_net_ops = {
	.init = l2tp_eth_init_net,
	.id   = &l2tp_eth_net_id,
	.size = sizeof(struct l2tp_eth_net),
};


static const struct l2tp_nl_cmd_ops l2tp_eth_nl_cmd_ops = {
	.session_create	= l2tp_eth_create,
	.session_delete	= l2tp_session_delete,
};


static int __init l2tp_eth_init(void)
{
	int err = 0;

	err = l2tp_nl_register_ops(L2TP_PWTYPE_ETH, &l2tp_eth_nl_cmd_ops);
	if (err)
		goto out;

	err = register_pernet_device(&l2tp_eth_net_ops);
	if (err)
		goto out_unreg;

	pr_info("L2TP ethernet pseudowire support (L2TPv3)\n");

	return 0;

out_unreg:
	l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
out:
	return err;
}

static void __exit l2tp_eth_exit(void)
{
	unregister_pernet_device(&l2tp_eth_net_ops);
	l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
}

module_init(l2tp_eth_init);
module_exit(l2tp_eth_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
MODULE_DESCRIPTION("L2TP ethernet pseudowire driver");
MODULE_VERSION("1.0");
Commit	Line	Data
d9e31d17 JC	1	/*
	2	* L2TPv3 ethernet pseudowire driver
	3	*
	4	* Copyright (c) 2008,2009,2010 Katalix Systems Ltd
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
a4ca44fa JP	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
a4ca44fa JP	13
d9e31d17 JC	14	#include <linux/module.h>
	15	#include <linux/skbuff.h>
	16	#include <linux/socket.h>
	17	#include <linux/hash.h>
	18	#include <linux/l2tp.h>
	19	#include <linux/in.h>
	20	#include <linux/etherdevice.h>
	21	#include <linux/spinlock.h>
	22	#include <net/sock.h>
	23	#include <net/ip.h>
	24	#include <net/icmp.h>
	25	#include <net/udp.h>
	26	#include <net/inet_common.h>
	27	#include <net/inet_hashtables.h>
	28	#include <net/tcp_states.h>
	29	#include <net/protocol.h>
	30	#include <net/xfrm.h>
	31	#include <net/net_namespace.h>
	32	#include <net/netns/generic.h>
	33
	34	#include "l2tp_core.h"
	35
	36	/* Default device name. May be overridden by name specified by user */
	37	#define L2TP_ETH_DEV_NAME "l2tpeth%d"
	38
	39	/* via netdev_priv() */
	40	struct l2tp_eth {
	41	struct net_device *dev;
	42	struct sock *tunnel_sock;
	43	struct l2tp_session *session;
	44	struct list_head list;
a2842a1e ED	45	atomic_long_t tx_bytes;
	46	atomic_long_t tx_packets;
	47	atomic_long_t rx_bytes;
	48	atomic_long_t rx_packets;
	49	atomic_long_t rx_errors;
d9e31d17 JC	50	};
	51
	52	/* via l2tp_session_priv() */
	53	struct l2tp_eth_sess {
	54	struct net_device *dev;
	55	};
	56
	57	/* per-net private data for this module */
	58	static unsigned int l2tp_eth_net_id;
	59	struct l2tp_eth_net {
	60	struct list_head l2tp_eth_dev_list;
	61	spinlock_t l2tp_eth_lock;
	62	};
	63
	64	static inline struct l2tp_eth_net l2tp_eth_pernet(struct net net)
	65	{
	66	return net_generic(net, l2tp_eth_net_id);
	67	}
	68
	69	static int l2tp_eth_dev_init(struct net_device *dev)
	70	{
	71	struct l2tp_eth *priv = netdev_priv(dev);
	72
	73	priv->dev = dev;
f2cedb63	74	eth_hw_addr_random(dev);
d9e31d17 JC	75	memset(&dev->broadcast[0], 0xff, 6);
	76
	77	return 0;
	78	}
	79
	80	static void l2tp_eth_dev_uninit(struct net_device *dev)
	81	{
	82	struct l2tp_eth *priv = netdev_priv(dev);
	83	struct l2tp_eth_net *pn = l2tp_eth_pernet(dev_net(dev));
	84
	85	spin_lock(&pn->l2tp_eth_lock);
	86	list_del_init(&priv->list);
	87	spin_unlock(&pn->l2tp_eth_lock);
	88	dev_put(dev);
	89	}
	90
	91	static int l2tp_eth_dev_xmit(struct sk_buff skb, struct net_device dev)
	92	{
	93	struct l2tp_eth *priv = netdev_priv(dev);
	94	struct l2tp_session *session = priv->session;
	95
a2842a1e ED	96	atomic_long_add(skb->len, &priv->tx_bytes);
a2842a1e ED	97	atomic_long_inc(&priv->tx_packets);
d9e31d17	98
aa214de0 ED	99	l2tp_xmit_skb(session, skb, session->hdr_len);
	100
	101	return NETDEV_TX_OK;
d9e31d17 JC	102	}
d9e31d17 JC	103
a2842a1e ED	104	static struct rtnl_link_stats64 l2tp_eth_get_stats64(struct net_device dev,
	105	struct rtnl_link_stats64 *stats)
	106	{
	107	struct l2tp_eth *priv = netdev_priv(dev);
	108
	109	stats->tx_bytes = atomic_long_read(&priv->tx_bytes);
	110	stats->tx_packets = atomic_long_read(&priv->tx_packets);
	111	stats->rx_bytes = atomic_long_read(&priv->rx_bytes);
	112	stats->rx_packets = atomic_long_read(&priv->rx_packets);
	113	stats->rx_errors = atomic_long_read(&priv->rx_errors);
	114	return stats;
	115	}
	116
	117
d9e31d17 JC	118	static struct net_device_ops l2tp_eth_netdev_ops = {
	119	.ndo_init = l2tp_eth_dev_init,
	120	.ndo_uninit = l2tp_eth_dev_uninit,
	121	.ndo_start_xmit = l2tp_eth_dev_xmit,
a2842a1e	122	.ndo_get_stats64 = l2tp_eth_get_stats64,
d9e31d17 JC	123	};
	124
	125	static void l2tp_eth_dev_setup(struct net_device *dev)
	126	{
	127	ether_setup(dev);
a2842a1e ED	128	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
a2842a1e ED	129	dev->features \|= NETIF_F_LLTX;
d9e31d17 JC	130	dev->netdev_ops = &l2tp_eth_netdev_ops;
	131	dev->destructor = free_netdev;
	132	}
	133
	134	static void l2tp_eth_dev_recv(struct l2tp_session session, struct sk_buff skb, int data_len)
	135	{
	136	struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
	137	struct net_device *dev = spriv->dev;
a2842a1e	138	struct l2tp_eth *priv = netdev_priv(dev);
d9e31d17 JC	139
	140	if (session->debug & L2TP_MSG_DATA) {
	141	unsigned int length;
d9e31d17 JC	142
	143	length = min(32u, skb->len);
	144	if (!pskb_may_pull(skb, length))
	145	goto error;
	146
a4ca44fa	147	pr_debug("%s: eth recv\n", session->name);
a2842a1e	148	print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, skb->data, length);
d9e31d17 JC	149	}
d9e31d17 JC	150
bfc960a8	151	if (!pskb_may_pull(skb, sizeof(ETH_HLEN)))
d9e31d17 JC	152	goto error;
	153
	154	secpath_reset(skb);
	155
	156	/* checksums verified by L2TP */
	157	skb->ip_summed = CHECKSUM_NONE;
	158
	159	skb_dst_drop(skb);
	160	nf_reset(skb);
	161
	162	if (dev_forward_skb(dev, skb) == NET_RX_SUCCESS) {
a2842a1e ED	163	atomic_long_inc(&priv->rx_packets);
	164	atomic_long_add(data_len, &priv->rx_bytes);
	165	} else {
	166	atomic_long_inc(&priv->rx_errors);
	167	}
d9e31d17 JC	168	return;
	169
	170	error:
a2842a1e	171	atomic_long_inc(&priv->rx_errors);
d9e31d17 JC	172	kfree_skb(skb);
	173	}
	174
	175	static void l2tp_eth_delete(struct l2tp_session *session)
	176	{
	177	struct l2tp_eth_sess *spriv;
	178	struct net_device *dev;
	179
	180	if (session) {
	181	spriv = l2tp_session_priv(session);
	182	dev = spriv->dev;
	183	if (dev) {
	184	unregister_netdev(dev);
	185	spriv->dev = NULL;
a06998b8	186	module_put(THIS_MODULE);
d9e31d17 JC	187	}
	188	}
	189	}
	190
f66ef2d0	191	#if defined(CONFIG_L2TP_DEBUGFS) \|\| defined(CONFIG_L2TP_DEBUGFS_MODULE)
0ad66140 JC	192	static void l2tp_eth_show(struct seq_file m, void arg)
	193	{
	194	struct l2tp_session *session = arg;
	195	struct l2tp_eth_sess *spriv = l2tp_session_priv(session);
	196	struct net_device *dev = spriv->dev;
	197
	198	seq_printf(m, " interface %s\n", dev->name);
	199	}
	200	#endif
	201
d9e31d17 JC	202	static int l2tp_eth_create(struct net net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg cfg)
	203	{
	204	struct net_device *dev;
	205	char name[IFNAMSIZ];
	206	struct l2tp_tunnel *tunnel;
	207	struct l2tp_session *session;
	208	struct l2tp_eth *priv;
	209	struct l2tp_eth_sess *spriv;
	210	int rc;
	211	struct l2tp_eth_net *pn;
	212
	213	tunnel = l2tp_tunnel_find(net, tunnel_id);
	214	if (!tunnel) {
	215	rc = -ENODEV;
	216	goto out;
	217	}
	218
	219	session = l2tp_session_find(net, tunnel, session_id);
	220	if (session) {
	221	rc = -EEXIST;
	222	goto out;
	223	}
	224
	225	if (cfg->ifname) {
	226	dev = dev_get_by_name(net, cfg->ifname);
	227	if (dev) {
	228	dev_put(dev);
	229	rc = -EEXIST;
	230	goto out;
	231	}
	232	strlcpy(name, cfg->ifname, IFNAMSIZ);
	233	} else
	234	strcpy(name, L2TP_ETH_DEV_NAME);
	235
	236	session = l2tp_session_create(sizeof(*spriv), tunnel, session_id,
	237	peer_session_id, cfg);
	238	if (!session) {
	239	rc = -ENOMEM;
	240	goto out;
	241	}
	242
	243	dev = alloc_netdev(sizeof(*priv), name, l2tp_eth_dev_setup);
	244	if (!dev) {
	245	rc = -ENOMEM;
	246	goto out_del_session;
	247	}
	248
	249	dev_net_set(dev, net);
	250	if (session->mtu == 0)
	251	session->mtu = dev->mtu - session->hdr_len;
	252	dev->mtu = session->mtu;
	253	dev->needed_headroom += session->hdr_len;
	254
	255	priv = netdev_priv(dev);
	256	priv->dev = dev;
	257	priv->session = session;
	258	INIT_LIST_HEAD(&priv->list);
	259
	260	priv->tunnel_sock = tunnel->sock;
	261	session->recv_skb = l2tp_eth_dev_recv;
	262	session->session_close = l2tp_eth_delete;
f66ef2d0	263	#if defined(CONFIG_L2TP_DEBUGFS) \|\| defined(CONFIG_L2TP_DEBUGFS_MODULE)
0ad66140 JC	264	session->show = l2tp_eth_show;
0ad66140 JC	265	#endif
d9e31d17 JC	266
	267	spriv = l2tp_session_priv(session);
	268	spriv->dev = dev;
	269
	270	rc = register_netdev(dev);
	271	if (rc < 0)
	272	goto out_del_dev;
	273
a06998b8	274	__module_get(THIS_MODULE);
d9e31d17 JC	275	/* Must be done after register_netdev() */
	276	strlcpy(session->ifname, dev->name, IFNAMSIZ);
	277
	278	dev_hold(dev);
	279	pn = l2tp_eth_pernet(dev_net(dev));
	280	spin_lock(&pn->l2tp_eth_lock);
	281	list_add(&priv->list, &pn->l2tp_eth_dev_list);
	282	spin_unlock(&pn->l2tp_eth_lock);
	283
	284	return 0;
	285
	286	out_del_dev:
	287	free_netdev(dev);
	288	out_del_session:
	289	l2tp_session_delete(session);
	290	out:
	291	return rc;
	292	}
	293
	294	static __net_init int l2tp_eth_init_net(struct net *net)
	295	{
3a737028	296	struct l2tp_eth_net *pn = net_generic(net, l2tp_eth_net_id);
d9e31d17 JC	297
	298	INIT_LIST_HEAD(&pn->l2tp_eth_dev_list);
	299	spin_lock_init(&pn->l2tp_eth_lock);
	300
d9e31d17	301	return 0;
d9e31d17 JC	302	}
d9e31d17 JC	303
8aa525a9	304	static struct pernet_operations l2tp_eth_net_ops = {
d9e31d17	305	.init = l2tp_eth_init_net,
d9e31d17 JC	306	.id = &l2tp_eth_net_id,
	307	.size = sizeof(struct l2tp_eth_net),
	308	};
	309
	310
	311	static const struct l2tp_nl_cmd_ops l2tp_eth_nl_cmd_ops = {
	312	.session_create = l2tp_eth_create,
	313	.session_delete = l2tp_session_delete,
	314	};
	315
	316
	317	static int __init l2tp_eth_init(void)
	318	{
	319	int err = 0;
	320
	321	err = l2tp_nl_register_ops(L2TP_PWTYPE_ETH, &l2tp_eth_nl_cmd_ops);
	322	if (err)
	323	goto out;
	324
	325	err = register_pernet_device(&l2tp_eth_net_ops);
	326	if (err)
	327	goto out_unreg;
	328
a4ca44fa	329	pr_info("L2TP ethernet pseudowire support (L2TPv3)\n");
d9e31d17 JC	330
	331	return 0;
	332
	333	out_unreg:
	334	l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
	335	out:
	336	return err;
	337	}
	338
	339	static void __exit l2tp_eth_exit(void)
	340	{
	341	unregister_pernet_device(&l2tp_eth_net_ops);
	342	l2tp_nl_unregister_ops(L2TP_PWTYPE_ETH);
	343	}
	344
	345	module_init(l2tp_eth_init);
	346	module_exit(l2tp_eth_exit);
	347
	348	MODULE_LICENSE("GPL");
	349	MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
	350	MODULE_DESCRIPTION("L2TP ethernet pseudowire driver");
	351	MODULE_VERSION("1.0");