2 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 2012-2013 Pablo Neira Ayuso <pablo@netfilter.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Development of this code funded by Astaro AG (http://www.astaro.com/)
12 #include <linux/init.h>
13 #include <linux/module.h>
15 #include <linux/netfilter_ipv4.h>
16 #include <net/netfilter/nf_tables.h>
17 #include <net/net_namespace.h>
19 #include <net/net_namespace.h>
20 #include <net/netfilter/nf_tables_ipv4.h>
22 static unsigned int nft_ipv4_output(const struct nf_hook_ops *ops,
24 const struct net_device *in,
25 const struct net_device *out,
26 int (*okfn)(struct sk_buff *))
28 struct nft_pktinfo pkt;
30 if (unlikely(skb->len < sizeof(struct iphdr) ||
31 ip_hdr(skb)->ihl < sizeof(struct iphdr) / 4)) {
33 pr_info("nf_tables_ipv4: ignoring short SOCK_RAW "
37 nft_set_pktinfo_ipv4(&pkt, ops, skb, in, out);
39 return nft_do_chain_pktinfo(&pkt, ops);
42 static struct nft_af_info nft_af_ipv4 __read_mostly = {
43 .family = NFPROTO_IPV4,
44 .nhooks = NF_INET_NUMHOOKS,
47 [NF_INET_LOCAL_OUT] = nft_ipv4_output,
51 static int nf_tables_ipv4_init_net(struct net *net)
53 net->nft.ipv4 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
54 if (net->nft.ipv4 == NULL)
57 memcpy(net->nft.ipv4, &nft_af_ipv4, sizeof(nft_af_ipv4));
59 if (nft_register_afinfo(net, net->nft.ipv4) < 0)
68 static void nf_tables_ipv4_exit_net(struct net *net)
70 nft_unregister_afinfo(net->nft.ipv4);
74 static struct pernet_operations nf_tables_ipv4_net_ops = {
75 .init = nf_tables_ipv4_init_net,
76 .exit = nf_tables_ipv4_exit_net,
80 nft_do_chain_ipv4(const struct nf_hook_ops *ops,
82 const struct net_device *in,
83 const struct net_device *out,
84 int (*okfn)(struct sk_buff *))
86 struct nft_pktinfo pkt;
88 nft_set_pktinfo_ipv4(&pkt, ops, skb, in, out);
90 return nft_do_chain_pktinfo(&pkt, ops);
93 static struct nf_chain_type filter_ipv4 = {
94 .family = NFPROTO_IPV4,
96 .type = NFT_CHAIN_T_DEFAULT,
97 .hook_mask = (1 << NF_INET_LOCAL_IN) |
98 (1 << NF_INET_LOCAL_OUT) |
99 (1 << NF_INET_FORWARD) |
100 (1 << NF_INET_PRE_ROUTING) |
101 (1 << NF_INET_POST_ROUTING),
103 [NF_INET_LOCAL_IN] = nft_do_chain_ipv4,
104 [NF_INET_LOCAL_OUT] = nft_ipv4_output,
105 [NF_INET_FORWARD] = nft_do_chain_ipv4,
106 [NF_INET_PRE_ROUTING] = nft_do_chain_ipv4,
107 [NF_INET_POST_ROUTING] = nft_do_chain_ipv4,
111 static int __init nf_tables_ipv4_init(void)
113 nft_register_chain_type(&filter_ipv4);
114 return register_pernet_subsys(&nf_tables_ipv4_net_ops);
117 static void __exit nf_tables_ipv4_exit(void)
119 unregister_pernet_subsys(&nf_tables_ipv4_net_ops);
120 nft_unregister_chain_type(&filter_ipv4);
123 module_init(nf_tables_ipv4_init);
124 module_exit(nf_tables_ipv4_exit);
126 MODULE_LICENSE("GPL");
127 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
128 MODULE_ALIAS_NFT_FAMILY(AF_INET);