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");