1 /*
2 * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 2012 Intel Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 */
10
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/list.h>
14 #include <linux/skbuff.h>
15 #include <linux/ip.h>
16 #include <linux/netfilter.h>
17 #include <linux/netfilter_ipv6.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <net/netfilter/nf_conntrack.h>
20 #include <net/netfilter/nf_nat.h>
21 #include <net/netfilter/nf_nat_core.h>
22 #include <net/netfilter/nf_tables.h>
23 #include <net/netfilter/nf_tables_ipv6.h>
24 #include <net/netfilter/nf_nat_l3proto.h>
25 #include <net/ipv6.h>
26
27 static unsigned int nft_nat_do_chain(void *priv,
28 struct sk_buff *skb,
29 const struct nf_hook_state *state,
30 struct nf_conn *ct)
31 {
32 struct nft_pktinfo pkt;
33
34 nft_set_pktinfo_ipv6(&pkt, skb, state);
35
36 return nft_do_chain(&pkt, priv);
37 }
38
39 static unsigned int nft_nat_ipv6_fn(void *priv,
40 struct sk_buff *skb,
41 const struct nf_hook_state *state)
42 {
43 return nf_nat_ipv6_fn(priv, skb, state, nft_nat_do_chain);
44 }
45
46 static unsigned int nft_nat_ipv6_in(void *priv,
47 struct sk_buff *skb,
48 const struct nf_hook_state *state)
49 {
50 return nf_nat_ipv6_in(priv, skb, state, nft_nat_do_chain);
51 }
52
53 static unsigned int nft_nat_ipv6_out(void *priv,
54 struct sk_buff *skb,
55 const struct nf_hook_state *state)
56 {
57 return nf_nat_ipv6_out(priv, skb, state, nft_nat_do_chain);
58 }
59
60 static unsigned int nft_nat_ipv6_local_fn(void *priv,
61 struct sk_buff *skb,
62 const struct nf_hook_state *state)
63 {
64 return nf_nat_ipv6_local_fn(priv, skb, state, nft_nat_do_chain);
65 }
66
67 static const struct nf_chain_type nft_chain_nat_ipv6 = {
68 .name = "nat",
69 .type = NFT_CHAIN_T_NAT,
70 .family = NFPROTO_IPV6,
71 .owner = THIS_MODULE,
72 .hook_mask = (1 << NF_INET_PRE_ROUTING) |
73 (1 << NF_INET_POST_ROUTING) |
74 (1 << NF_INET_LOCAL_OUT) |
75 (1 << NF_INET_LOCAL_IN),
76 .hooks = {
77 [NF_INET_PRE_ROUTING] = nft_nat_ipv6_in,
78 [NF_INET_POST_ROUTING] = nft_nat_ipv6_out,
79 [NF_INET_LOCAL_OUT] = nft_nat_ipv6_local_fn,
80 [NF_INET_LOCAL_IN] = nft_nat_ipv6_fn,
81 },
82 };
83
84 static int __init nft_chain_nat_ipv6_init(void)
85 {
86 int err;
87
88 err = nft_register_chain_type(&nft_chain_nat_ipv6);
89 if (err < 0)
90 return err;
91
92 return 0;
93 }
94
95 static void __exit nft_chain_nat_ipv6_exit(void)
96 {
97 nft_unregister_chain_type(&nft_chain_nat_ipv6);
98 }
99
100 module_init(nft_chain_nat_ipv6_init);
101 module_exit(nft_chain_nat_ipv6_exit);
102
103 MODULE_LICENSE("GPL");
104 MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
105 MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");
106
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TOMOYO® is a registered trademark of NTT DATA CORPORATION.