[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)
{
	struct iphdr *iph;

	iph = skb->nh.iph;
	iph->tot_len = htons(skb->len);
	ip_send_check(iph);

	return 0;
}

static int ipip_xfrm_rcv(struct xfrm_state *x, struct sk_buff *skb)
{
	return 0;
}

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");
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	{
	15	struct iphdr *iph;
e905a9ed	16
1da177e4 LT	17	iph = skb->nh.iph;
	18	iph->tot_len = htons(skb->len);
	19	ip_send_check(iph);
	20
	21	return 0;
	22	}
	23
e695633e	24	static int ipip_xfrm_rcv(struct xfrm_state x, struct sk_buff skb)
1da177e4 LT	25	{
	26	return 0;
	27	}
	28
72cb6962	29	static int ipip_init_state(struct xfrm_state *x)
1da177e4	30	{
7e49e6de	31	if (x->props.mode != XFRM_MODE_TUNNEL)
1da177e4 LT	32	return -EINVAL;
	33
	34	if (x->encap)
	35	return -EINVAL;
	36
	37	x->props.header_len = sizeof(struct iphdr);
	38
	39	return 0;
	40	}
	41
	42	static void ipip_destroy(struct xfrm_state *x)
	43	{
	44	}
	45
	46	static struct xfrm_type ipip_type = {
	47	.description = "IPIP",
	48	.owner = THIS_MODULE,
	49	.proto = IPPROTO_IPIP,
	50	.init_state = ipip_init_state,
	51	.destructor = ipip_destroy,
	52	.input = ipip_xfrm_rcv,
	53	.output = ipip_output
	54	};
	55
d2acc347 HX	56	static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
	57	{
	58	return -ENOENT;
	59	}
	60
	61	static struct xfrm_tunnel xfrm_tunnel_handler = {
	62	.handler = xfrm4_rcv,
	63	.err_handler = xfrm_tunnel_err,
	64	.priority = 2,
1da177e4 LT	65	};
1da177e4 LT	66
c0d56408 KM	67	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	68	static struct xfrm_tunnel xfrm64_tunnel_handler = {
	69	.handler = xfrm4_rcv,
	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");