1 files changed, 107 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/nft_chain_nat_ipv4.c b/net/ipv4/netfilter/nft_chain_nat_ipv4.c
new file mode 100644
index 000000000..bf5c30ae1
--- /dev/null
+++ b/net/ipv4/netfilter/nft_chain_nat_ipv4.c
@@ -0,0 +1,107 @@
+/*
+ * 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(const struct nf_hook_ops *ops,
+				      struct sk_buff *skb,
+				      const struct nf_hook_state *state,
+				      struct nf_conn *ct)
+{
+	struct nft_pktinfo pkt;
+
+	nft_set_pktinfo_ipv4(&pkt, ops, skb, state);
+
+	return nft_do_chain(&pkt, ops);
+}
+
+static unsigned int nft_nat_ipv4_fn(const struct nf_hook_ops *ops,
+				    struct sk_buff *skb,
+				    const struct nf_hook_state *state)
+{
+	return nf_nat_ipv4_fn(ops, skb, state, nft_nat_do_chain);
+}
+
+static unsigned int nft_nat_ipv4_in(const struct nf_hook_ops *ops,
+				    struct sk_buff *skb,
+				    const struct nf_hook_state *state)
+{
+	return nf_nat_ipv4_in(ops, skb, state, nft_nat_do_chain);
+}
+
+static unsigned int nft_nat_ipv4_out(const struct nf_hook_ops *ops,
+				     struct sk_buff *skb,
+				     const struct nf_hook_state *state)
+{
+	return nf_nat_ipv4_out(ops, skb, state, nft_nat_do_chain);
+}
+
+static unsigned int nft_nat_ipv4_local_fn(const struct nf_hook_ops *ops,
+					  struct sk_buff *skb,
+					  const struct nf_hook_state *state)
+{
+	return nf_nat_ipv4_local_fn(ops, 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");