1 /* xfrm4_tunnel.c: Generic IP tunnel transformer.
3 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
6 #include <linux/skbuff.h>
7 #include <linux/module.h>
8 #include <linux/mutex.h>
11 #include <net/protocol.h>
13 static int ipip_output(struct xfrm_state
*x
, struct sk_buff
*skb
)
15 skb_push(skb
, -skb_network_offset(skb
));
19 static int ipip_xfrm_rcv(struct xfrm_state
*x
, struct sk_buff
*skb
)
21 return ip_hdr(skb
)->protocol
;
24 static int ipip_init_state(struct xfrm_state
*x
)
26 if (x
->props
.mode
!= XFRM_MODE_TUNNEL
)
32 x
->props
.header_len
= sizeof(struct iphdr
);
37 static void ipip_destroy(struct xfrm_state
*x
)
41 static struct xfrm_type ipip_type
= {
42 .description
= "IPIP",
44 .proto
= IPPROTO_IPIP
,
45 .init_state
= ipip_init_state
,
46 .destructor
= ipip_destroy
,
47 .input
= ipip_xfrm_rcv
,
51 static int xfrm_tunnel_err(struct sk_buff
*skb
, u32 info
)
56 static struct xfrm_tunnel xfrm_tunnel_handler
= {
58 .err_handler
= xfrm_tunnel_err
,
62 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
63 static struct xfrm_tunnel xfrm64_tunnel_handler
= {
65 .err_handler
= xfrm_tunnel_err
,
70 static int __init
ipip_init(void)
72 if (xfrm_register_type(&ipip_type
, AF_INET
) < 0) {
73 printk(KERN_INFO
"ipip init: can't add xfrm type\n");
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
);
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
);
86 xfrm_unregister_type(&ipip_type
, AF_INET
);
93 static void __exit
ipip_fini(void)
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");
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");
101 if (xfrm_unregister_type(&ipip_type
, AF_INET
) < 0)
102 printk(KERN_INFO
"ipip close: can't remove xfrm type\n");
105 module_init(ipip_init
);
106 module_exit(ipip_fini
);
107 MODULE_LICENSE("GPL");
108 MODULE_ALIAS_XFRM_TYPE(AF_INET
, XFRM_PROTO_IPIP
);