[net-next-2.6.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 ip_hdr(skb)->protocol;
}

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 const 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_rcv(struct sk_buff *skb)
{
	return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
}

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

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

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static struct xfrm_tunnel xfrm64_tunnel_handler __read_mostly = {
	.handler	=	xfrm_tunnel_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	{
04663d0b	21	return ip_hdr(skb)->protocol;
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
533cb5b0	41	static const struct xfrm_type ipip_type = {
1da177e4 LT	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
c4541b41 HX	51	static int xfrm_tunnel_rcv(struct sk_buff *skb)
c4541b41 HX	52	{
b1641064	53	return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr);
c4541b41 HX	54	}
c4541b41 HX	55
d2acc347 HX	56	static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
	57	{
	58	return -ENOENT;
	59	}
	60
6dcd814b	61	static struct xfrm_tunnel xfrm_tunnel_handler __read_mostly = {
c4541b41	62	.handler = xfrm_tunnel_rcv,
d2acc347 HX	63	.err_handler = xfrm_tunnel_err,
d2acc347 HX	64	.priority = 2,
1da177e4 LT	65	};
1da177e4 LT	66
c0d56408	67	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
6dcd814b	68	static struct xfrm_tunnel xfrm64_tunnel_handler __read_mostly = {
c4541b41	69	.handler = xfrm_tunnel_rcv,
c0d56408 KM	70	.err_handler = xfrm_tunnel_err,
	71	.priority = 2,
	72	};
	73	#endif
	74
1da177e4 LT	75	static int __init ipip_init(void)
	76	{
	77	if (xfrm_register_type(&ipip_type, AF_INET) < 0) {
	78	printk(KERN_INFO "ipip init: can't add xfrm type\n");
	79	return -EAGAIN;
	80	}
c0d56408 KM	81
	82	if (xfrm4_tunnel_register(&xfrm_tunnel_handler, AF_INET)) {
	83	printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET\n");
	84	xfrm_unregister_type(&ipip_type, AF_INET);
	85	return -EAGAIN;
	86	}
	87	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	88	if (xfrm4_tunnel_register(&xfrm64_tunnel_handler, AF_INET6)) {
	89	printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET6\n");
	90	xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET);
1da177e4 LT	91	xfrm_unregister_type(&ipip_type, AF_INET);
	92	return -EAGAIN;
	93	}
c0d56408	94	#endif
1da177e4 LT	95	return 0;
	96	}
	97
	98	static void __exit ipip_fini(void)
	99	{
c0d56408 KM	100	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	101	if (xfrm4_tunnel_deregister(&xfrm64_tunnel_handler, AF_INET6))
	102	printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET6\n");
	103	#endif
	104	if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET))
	105	printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET\n");
1da177e4 LT	106	if (xfrm_unregister_type(&ipip_type, AF_INET) < 0)
	107	printk(KERN_INFO "ipip close: can't remove xfrm type\n");
	108	}
	109
	110	module_init(ipip_init);
	111	module_exit(ipip_fini);
	112	MODULE_LICENSE("GPL");
d3d6dd3a	113	MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_IPIP);