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- /*
- * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org>
- * Copyright (c) 2012 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/list.h>
- #include <linux/skbuff.h>
- #include <linux/ip.h>
- #include <linux/netfilter.h>
- #include <linux/netfilter_ipv4.h>
- #include <linux/netfilter/nf_tables.h>
- #include <net/netfilter/nf_conntrack.h>
- #include <net/netfilter/nf_nat.h>
- #include <net/netfilter/nf_nat_core.h>
- #include <net/netfilter/nf_tables.h>
- #include <net/netfilter/nf_tables_ipv4.h>
- #include <net/netfilter/nf_nat_l3proto.h>
- #include <net/ip.h>
- static unsigned int nft_nat_do_chain(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state,
- struct nf_conn *ct)
- {
- struct nft_pktinfo pkt;
- nft_set_pktinfo_ipv4(&pkt, skb, state);
- return nft_do_chain(&pkt, priv);
- }
- static unsigned int nft_nat_ipv4_fn(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- return nf_nat_ipv4_fn(priv, skb, state, nft_nat_do_chain);
- }
- static unsigned int nft_nat_ipv4_in(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- return nf_nat_ipv4_in(priv, skb, state, nft_nat_do_chain);
- }
- static unsigned int nft_nat_ipv4_out(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- return nf_nat_ipv4_out(priv, skb, state, nft_nat_do_chain);
- }
- static unsigned int nft_nat_ipv4_local_fn(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- return nf_nat_ipv4_local_fn(priv, skb, state, nft_nat_do_chain);
- }
- static const struct nf_chain_type nft_chain_nat_ipv4 = {
- .name = "nat",
- .type = NFT_CHAIN_T_NAT,
- .family = NFPROTO_IPV4,
- .owner = THIS_MODULE,
- .hook_mask = (1 << NF_INET_PRE_ROUTING) |
- (1 << NF_INET_POST_ROUTING) |
- (1 << NF_INET_LOCAL_OUT) |
- (1 << NF_INET_LOCAL_IN),
- .hooks = {
- [NF_INET_PRE_ROUTING] = nft_nat_ipv4_in,
- [NF_INET_POST_ROUTING] = nft_nat_ipv4_out,
- [NF_INET_LOCAL_OUT] = nft_nat_ipv4_local_fn,
- [NF_INET_LOCAL_IN] = nft_nat_ipv4_fn,
- },
- };
- static int __init nft_chain_nat_init(void)
- {
- int err;
- err = nft_register_chain_type(&nft_chain_nat_ipv4);
- if (err < 0)
- return err;
- return 0;
- }
- static void __exit nft_chain_nat_exit(void)
- {
- nft_unregister_chain_type(&nft_chain_nat_ipv4);
- }
- module_init(nft_chain_nat_init);
- module_exit(nft_chain_nat_exit);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
- MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat");
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