2 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
4 * Copyright (c) 2012 Intel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Development of this code funded by Astaro AG (http://www.astaro.com/)
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/list.h>
16 #include <linux/skbuff.h>
18 #include <linux/netfilter.h>
19 #include <linux/netfilter_ipv4.h>
20 #include <linux/netfilter/nf_tables.h>
21 #include <net/netfilter/nf_conntrack.h>
22 #include <net/netfilter/nf_nat.h>
23 #include <net/netfilter/nf_nat_core.h>
24 #include <net/netfilter/nf_tables.h>
25 #include <net/netfilter/nf_tables_ipv4.h>
26 #include <net/netfilter/nf_nat_l3proto.h>
29 static unsigned int nft_nat_do_chain(const struct nf_hook_ops *ops,
31 const struct net_device *in,
32 const struct net_device *out,
35 struct nft_pktinfo pkt;
37 nft_set_pktinfo_ipv4(&pkt, ops, skb, in, out);
39 return nft_do_chain(&pkt, ops);
42 static unsigned int nft_nat_ipv4_fn(const struct nf_hook_ops *ops,
44 const struct net_device *in,
45 const struct net_device *out,
46 int (*okfn)(struct sk_buff *))
48 return nf_nat_ipv4_fn(ops, skb, in, out, nft_nat_do_chain);
51 static unsigned int nft_nat_ipv4_in(const struct nf_hook_ops *ops,
53 const struct net_device *in,
54 const struct net_device *out,
55 int (*okfn)(struct sk_buff *))
57 return nf_nat_ipv4_in(ops, skb, in, out, nft_nat_do_chain);
60 static unsigned int nft_nat_ipv4_out(const struct nf_hook_ops *ops,
62 const struct net_device *in,
63 const struct net_device *out,
64 int (*okfn)(struct sk_buff *))
66 return nf_nat_ipv4_out(ops, skb, in, out, nft_nat_do_chain);
69 static unsigned int nft_nat_ipv4_local_fn(const struct nf_hook_ops *ops,
71 const struct net_device *in,
72 const struct net_device *out,
73 int (*okfn)(struct sk_buff *))
75 return nf_nat_ipv4_local_fn(ops, skb, in, out, nft_nat_do_chain);
78 static const struct nf_chain_type nft_chain_nat_ipv4 = {
80 .type = NFT_CHAIN_T_NAT,
81 .family = NFPROTO_IPV4,
83 .hook_mask = (1 << NF_INET_PRE_ROUTING) |
84 (1 << NF_INET_POST_ROUTING) |
85 (1 << NF_INET_LOCAL_OUT) |
86 (1 << NF_INET_LOCAL_IN),
88 [NF_INET_PRE_ROUTING] = nft_nat_ipv4_in,
89 [NF_INET_POST_ROUTING] = nft_nat_ipv4_out,
90 [NF_INET_LOCAL_OUT] = nft_nat_ipv4_local_fn,
91 [NF_INET_LOCAL_IN] = nft_nat_ipv4_fn,
95 static int __init nft_chain_nat_init(void)
99 err = nft_register_chain_type(&nft_chain_nat_ipv4);
106 static void __exit nft_chain_nat_exit(void)
108 nft_unregister_chain_type(&nft_chain_nat_ipv4);
111 module_init(nft_chain_nat_init);
112 module_exit(nft_chain_nat_exit);
114 MODULE_LICENSE("GPL");
115 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
116 MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat");