1 files changed, 128 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/nf_tables_ipv4.c b/net/ipv4/netfilter/nf_tables_ipv4.c
new file mode 100644
index 000000000000..8f7536be1322
--- /dev/null
+++ b/net/ipv4/netfilter/nf_tables_ipv4.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2012-2013 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/netfilter_ipv4.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/net_namespace.h>
+#include <net/ip.h>
+#include <net/net_namespace.h>
+#include <net/netfilter/nf_tables_ipv4.h>
+
+static unsigned int nft_ipv4_output(const struct nf_hook_ops *ops,
+				    struct sk_buff *skb,
+				    const struct net_device *in,
+				    const struct net_device *out,
+				    int (*okfn)(struct sk_buff *))
+{
+	struct nft_pktinfo pkt;
+
+	if (unlikely(skb->len < sizeof(struct iphdr) ||
+		     ip_hdr(skb)->ihl < sizeof(struct iphdr) / 4)) {
+		if (net_ratelimit())
+			pr_info("nf_tables_ipv4: ignoring short SOCK_RAW "
+				"packet\n");
+		return NF_ACCEPT;
+	}
+	nft_set_pktinfo_ipv4(&pkt, ops, skb, in, out);
+
+	return nft_do_chain_pktinfo(&pkt, ops);
+}
+
+static struct nft_af_info nft_af_ipv4 __read_mostly = {
+	.family		= NFPROTO_IPV4,
+	.nhooks		= NF_INET_NUMHOOKS,
+	.owner		= THIS_MODULE,
+	.hooks		= {
+		[NF_INET_LOCAL_OUT]	= nft_ipv4_output,
+	},
+};
+
+static int nf_tables_ipv4_init_net(struct net *net)
+{
+	net->nft.ipv4 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
+	if (net->nft.ipv4 == NULL)
+		return -ENOMEM;
+
+	memcpy(net->nft.ipv4, &nft_af_ipv4, sizeof(nft_af_ipv4));
+
+	if (nft_register_afinfo(net, net->nft.ipv4) < 0)
+		goto err;
+
+	return 0;
+err:
+	kfree(net->nft.ipv4);
+	return -ENOMEM;
+}
+
+static void nf_tables_ipv4_exit_net(struct net *net)
+{
+	nft_unregister_afinfo(net->nft.ipv4);
+	kfree(net->nft.ipv4);
+}
+
+static struct pernet_operations nf_tables_ipv4_net_ops = {
+	.init	= nf_tables_ipv4_init_net,
+	.exit	= nf_tables_ipv4_exit_net,
+};
+
+static unsigned int
+nft_do_chain_ipv4(const struct nf_hook_ops *ops,
+		  struct sk_buff *skb,
+		  const struct net_device *in,
+		  const struct net_device *out,
+		  int (*okfn)(struct sk_buff *))
+{
+	struct nft_pktinfo pkt;
+
+	nft_set_pktinfo_ipv4(&pkt, ops, skb, in, out);
+
+	return nft_do_chain_pktinfo(&pkt, ops);
+}
+
+static struct nf_chain_type filter_ipv4 = {
+	.family		= NFPROTO_IPV4,
+	.name		= "filter",
+	.type		= NFT_CHAIN_T_DEFAULT,
+	.hook_mask	= (1 << NF_INET_LOCAL_IN) |
+			  (1 << NF_INET_LOCAL_OUT) |
+			  (1 << NF_INET_FORWARD) |
+			  (1 << NF_INET_PRE_ROUTING) |
+			  (1 << NF_INET_POST_ROUTING),
+	.fn		= {
+		[NF_INET_LOCAL_IN]	= nft_do_chain_ipv4,
+		[NF_INET_LOCAL_OUT]	= nft_ipv4_output,
+		[NF_INET_FORWARD]	= nft_do_chain_ipv4,
+		[NF_INET_PRE_ROUTING]	= nft_do_chain_ipv4,
+		[NF_INET_POST_ROUTING]	= nft_do_chain_ipv4,
+	},
+};
+
+static int __init nf_tables_ipv4_init(void)
+{
+	nft_register_chain_type(&filter_ipv4);
+	return register_pernet_subsys(&nf_tables_ipv4_net_ops);
+}
+
+static void __exit nf_tables_ipv4_exit(void)
+{
+	unregister_pernet_subsys(&nf_tables_ipv4_net_ops);
+	nft_unregister_chain_type(&filter_ipv4);
+}
+
+module_init(nf_tables_ipv4_init);
+module_exit(nf_tables_ipv4_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_FAMILY(AF_INET);