]>
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 | { | |
eddc9ec5 | 15 | struct iphdr *iph = ip_hdr(skb); |
e905a9ed | 16 | |
1da177e4 LT |
17 | iph->tot_len = htons(skb->len); |
18 | ip_send_check(iph); | |
19 | ||
20 | return 0; | |
21 | } | |
22 | ||
e695633e | 23 | static int ipip_xfrm_rcv(struct xfrm_state *x, struct sk_buff *skb) |
1da177e4 LT |
24 | { |
25 | return 0; | |
26 | } | |
27 | ||
72cb6962 | 28 | static int ipip_init_state(struct xfrm_state *x) |
1da177e4 | 29 | { |
7e49e6de | 30 | if (x->props.mode != XFRM_MODE_TUNNEL) |
1da177e4 LT |
31 | return -EINVAL; |
32 | ||
33 | if (x->encap) | |
34 | return -EINVAL; | |
35 | ||
36 | x->props.header_len = sizeof(struct iphdr); | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
41 | static void ipip_destroy(struct xfrm_state *x) | |
42 | { | |
43 | } | |
44 | ||
45 | static struct xfrm_type ipip_type = { | |
46 | .description = "IPIP", | |
47 | .owner = THIS_MODULE, | |
48 | .proto = IPPROTO_IPIP, | |
49 | .init_state = ipip_init_state, | |
50 | .destructor = ipip_destroy, | |
51 | .input = ipip_xfrm_rcv, | |
52 | .output = ipip_output | |
53 | }; | |
54 | ||
d2acc347 HX |
55 | static int xfrm_tunnel_err(struct sk_buff *skb, u32 info) |
56 | { | |
57 | return -ENOENT; | |
58 | } | |
59 | ||
60 | static struct xfrm_tunnel xfrm_tunnel_handler = { | |
61 | .handler = xfrm4_rcv, | |
62 | .err_handler = xfrm_tunnel_err, | |
63 | .priority = 2, | |
1da177e4 LT |
64 | }; |
65 | ||
c0d56408 KM |
66 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
67 | static struct xfrm_tunnel xfrm64_tunnel_handler = { | |
68 | .handler = xfrm4_rcv, | |
69 | .err_handler = xfrm_tunnel_err, | |
70 | .priority = 2, | |
71 | }; | |
72 | #endif | |
73 | ||
1da177e4 LT |
74 | static int __init ipip_init(void) |
75 | { | |
76 | if (xfrm_register_type(&ipip_type, AF_INET) < 0) { | |
77 | printk(KERN_INFO "ipip init: can't add xfrm type\n"); | |
78 | return -EAGAIN; | |
79 | } | |
c0d56408 KM |
80 | |
81 | if (xfrm4_tunnel_register(&xfrm_tunnel_handler, AF_INET)) { | |
82 | printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET\n"); | |
83 | xfrm_unregister_type(&ipip_type, AF_INET); | |
84 | return -EAGAIN; | |
85 | } | |
86 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
87 | if (xfrm4_tunnel_register(&xfrm64_tunnel_handler, AF_INET6)) { | |
88 | printk(KERN_INFO "ipip init: can't add xfrm handler for AF_INET6\n"); | |
89 | xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET); | |
1da177e4 LT |
90 | xfrm_unregister_type(&ipip_type, AF_INET); |
91 | return -EAGAIN; | |
92 | } | |
c0d56408 | 93 | #endif |
1da177e4 LT |
94 | return 0; |
95 | } | |
96 | ||
97 | static void __exit ipip_fini(void) | |
98 | { | |
c0d56408 KM |
99 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
100 | if (xfrm4_tunnel_deregister(&xfrm64_tunnel_handler, AF_INET6)) | |
101 | printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET6\n"); | |
102 | #endif | |
103 | if (xfrm4_tunnel_deregister(&xfrm_tunnel_handler, AF_INET)) | |
104 | printk(KERN_INFO "ipip close: can't remove xfrm handler for AF_INET\n"); | |
1da177e4 LT |
105 | if (xfrm_unregister_type(&ipip_type, AF_INET) < 0) |
106 | printk(KERN_INFO "ipip close: can't remove xfrm type\n"); | |
107 | } | |
108 | ||
109 | module_init(ipip_init); | |
110 | module_exit(ipip_fini); | |
111 | MODULE_LICENSE("GPL"); |