[deliverable/linux.git] / net / ipv4 / xfrm4_tunnel.c

/* xfrm4_tunnel.c: Generic IP tunnel transformer.
 *
 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
 */

#include <linux/skbuff.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <net/xfrm.h>
#include <net/ip.h>
#include <net/protocol.h>

static int ipip_output(struct xfrm_state *x, struct sk_buff *skb)
{
	skb_push(skb, -skb_network_offset(skb));
	return 0;
}

static int ipip_xfrm_rcv(struct xfrm_state *x, struct sk_buff *skb)
{
	return IPPROTO_IP;
}

static int ipip_init_state(struct xfrm_state *x)
{
	if (x->props.mode != XFRM_MODE_TUNNEL)
		return -EINVAL;

	if (x->encap)
		return -EINVAL;

	x->props.header_len = sizeof(struct iphdr);

	return 0;
}

static void ipip_destroy(struct xfrm_state *x)
{
}

static struct xfrm_type ipip_type = {
	.description	= "IPIP",
	.owner		= THIS_MODULE,
	.proto	     	= IPPROTO_IPIP,
	.init_state	= ipip_init_state,
	.destructor	= ipip_destroy,
	.input		= ipip_xfrm_rcv,
	.output		= ipip_output
};

static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
{
	return -ENOENT;
}

static struct xfrm_tunnel xfrm_tunnel_handler = {
	.handler	=	xfrm4_rcv,
	.err_handler	=	xfrm_tunnel_err,
	.priority	=	2,
};

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static struct xfrm_tunnel xfrm64_tunnel_handler = {
	.handler	=	xfrm4_rcv,
	.err_handler	=	xfrm_tunnel_err,
	.priority	=	2,
};
#endif

static int __init ipip_init(void)
{
	if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
		printk(KERN_INFO "ipip init: can't add xfrm type\n");
		return -EAGAIN;
	}

	if (xfrm4_tunnel_register(&xfrm_tunnel_handler, AF_INET)) {
		printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET\n");
		xfrm_unregister_type(&ipip_type, AF_INET);
		return -EAGAIN;
	}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	if (xfrm4_tunnel_register(&xfrm64_tunnel_handler, AF_INET6)) {
		printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET6\n");
		xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET);
		xfrm_unregister_type(&ipip_type, AF_INET);
		return -EAGAIN;
	}
#endif
	return 0;
}

static void __exit ipip_fini(void)
{
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	if (xfrm4_tunnel_deregister(&xfrm64_tunnel_handler, AF_INET6))
		printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET6\n");
#endif
	if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET))
		printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET\n");
	if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
		printk(KERN_INFO "ipip close: can't remove xfrm type\n");
}

module_init(ipip_init);
module_exit(ipip_fini);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_IPIP);
Commit	Line	Data
1da177e4 LT	1	/* xfrm4_tunnel.c: Generic IP tunnel transformer.
	2	*
	3	* Copyright (C) 2003 David S. Miller (davem@redhat.com)
	4	*/
	5
	6	#include <linux/skbuff.h>
	7	#include <linux/module.h>
4a3e2f71	8	#include <linux/mutex.h>
1da177e4 LT	9	#include <net/xfrm.h>
	10	#include <net/ip.h>
	11	#include <net/protocol.h>
	12
	13	static int ipip_output(struct xfrm_state x, struct sk_buff skb)
	14	{
7b277b1a	15	skb_push(skb, -skb_network_offset(skb));
1da177e4 LT	16	return 0;
	17	}
	18
e695633e	19	static int ipip_xfrm_rcv(struct xfrm_state x, struct sk_buff skb)
1da177e4	20	{
631a6698	21	return IPPROTO_IP;
1da177e4 LT	22	}
1da177e4 LT	23
72cb6962	24	static int ipip_init_state(struct xfrm_state *x)
1da177e4	25	{
7e49e6de	26	if (x->props.mode != XFRM_MODE_TUNNEL)
1da177e4 LT	27	return -EINVAL;
	28
	29	if (x->encap)
	30	return -EINVAL;
	31
	32	x->props.header_len = sizeof(struct iphdr);
	33
	34	return 0;
	35	}
	36
	37	static void ipip_destroy(struct xfrm_state *x)
	38	{
	39	}
	40
	41	static struct xfrm_type ipip_type = {
	42	.description = "IPIP",
	43	.owner = THIS_MODULE,
	44	.proto = IPPROTO_IPIP,
	45	.init_state = ipip_init_state,
	46	.destructor = ipip_destroy,
	47	.input = ipip_xfrm_rcv,
	48	.output = ipip_output
	49	};
	50
d2acc347 HX	51	static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
	52	{
	53	return -ENOENT;
	54	}
	55
	56	static struct xfrm_tunnel xfrm_tunnel_handler = {
	57	.handler = xfrm4_rcv,
	58	.err_handler = xfrm_tunnel_err,
	59	.priority = 2,
1da177e4 LT	60	};
1da177e4 LT	61
c0d56408 KM	62	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	63	static struct xfrm_tunnel xfrm64_tunnel_handler = {
	64	.handler = xfrm4_rcv,
	65	.err_handler = xfrm_tunnel_err,
	66	.priority = 2,
	67	};
	68	#endif
	69
1da177e4 LT	70	static int __init ipip_init(void)
	71	{
	72	if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
	73	printk(KERN_INFO "ipip init: can't add xfrm type\n");
	74	return -EAGAIN;
	75	}
c0d56408 KM	76
	77	if (xfrm4_tunnel_register(&xfrm_tunnel_handler, AF_INET)) {
	78	printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET\n");
	79	xfrm_unregister_type(&ipip_type, AF_INET);
	80	return -EAGAIN;
	81	}
	82	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	83	if (xfrm4_tunnel_register(&xfrm64_tunnel_handler, AF_INET6)) {
	84	printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET6\n");
	85	xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET);
1da177e4 LT	86	xfrm_unregister_type(&ipip_type, AF_INET);
	87	return -EAGAIN;
	88	}
c0d56408	89	#endif
1da177e4 LT	90	return 0;
	91	}
	92
	93	static void __exit ipip_fini(void)
	94	{
c0d56408 KM	95	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	96	if (xfrm4_tunnel_deregister(&xfrm64_tunnel_handler, AF_INET6))
	97	printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET6\n");
	98	#endif
	99	if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET))
	100	printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET\n");
1da177e4 LT	101	if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
	102	printk(KERN_INFO "ipip close: can't remove xfrm type\n");
	103	}
	104
	105	module_init(ipip_init);
	106	module_exit(ipip_fini);
	107	MODULE_LICENSE("GPL");
d3d6dd3a	108	MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_IPIP);