2 * Copyright (c) 2008-2010 Patrick McHardy <kaber@trash.net>
3 * Copyright (c) 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/module.h>
13 #include <linux/init.h>
14 #include <linux/netfilter_arp.h>
15 #include <net/netfilter/nf_tables.h>
17 static struct nft_af_info nft_af_arp __read_mostly = {
18 .family = NFPROTO_ARP,
19 .nhooks = NF_ARP_NUMHOOKS,
23 static int nf_tables_arp_init_net(struct net *net)
25 net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
26 if (net->nft.arp== NULL)
29 memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp));
31 if (nft_register_afinfo(net, net->nft.arp) < 0)
40 static void nf_tables_arp_exit_net(struct net *net)
42 nft_unregister_afinfo(net->nft.arp);
46 static struct pernet_operations nf_tables_arp_net_ops = {
47 .init = nf_tables_arp_init_net,
48 .exit = nf_tables_arp_exit_net,
52 nft_do_chain_arp(const struct nf_hook_ops *ops,
54 const struct net_device *in,
55 const struct net_device *out,
56 int (*okfn)(struct sk_buff *))
58 struct nft_pktinfo pkt;
60 nft_set_pktinfo(&pkt, ops, skb, in, out);
62 return nft_do_chain_pktinfo(&pkt, ops);
65 static struct nf_chain_type filter_arp = {
66 .family = NFPROTO_ARP,
68 .type = NFT_CHAIN_T_DEFAULT,
69 .hook_mask = (1 << NF_ARP_IN) |
71 (1 << NF_ARP_FORWARD),
73 [NF_ARP_IN] = nft_do_chain_arp,
74 [NF_ARP_OUT] = nft_do_chain_arp,
75 [NF_ARP_FORWARD] = nft_do_chain_arp,
79 static int __init nf_tables_arp_init(void)
83 nft_register_chain_type(&filter_arp);
84 ret = register_pernet_subsys(&nf_tables_arp_net_ops);
86 nft_unregister_chain_type(&filter_arp);
91 static void __exit nf_tables_arp_exit(void)
93 unregister_pernet_subsys(&nf_tables_arp_net_ops);
94 nft_unregister_chain_type(&filter_arp);
97 module_init(nf_tables_arp_init);
98 module_exit(nf_tables_arp_exit);
100 MODULE_LICENSE("GPL");
101 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
102 MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */