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>
18 nft_do_chain_arp(const struct nf_hook_ops *ops,
20 const struct nf_hook_state *state)
22 struct nft_pktinfo pkt;
24 nft_set_pktinfo(&pkt, ops, skb, state);
26 return nft_do_chain(&pkt, ops);
29 static struct nft_af_info nft_af_arp __read_mostly = {
30 .family = NFPROTO_ARP,
31 .nhooks = NF_ARP_NUMHOOKS,
35 [NF_ARP_IN] = nft_do_chain_arp,
36 [NF_ARP_OUT] = nft_do_chain_arp,
37 [NF_ARP_FORWARD] = nft_do_chain_arp,
41 static int nf_tables_arp_init_net(struct net *net)
43 net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
44 if (net->nft.arp== NULL)
47 memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp));
49 if (nft_register_afinfo(net, net->nft.arp) < 0)
58 static void nf_tables_arp_exit_net(struct net *net)
60 nft_unregister_afinfo(net->nft.arp);
64 static struct pernet_operations nf_tables_arp_net_ops = {
65 .init = nf_tables_arp_init_net,
66 .exit = nf_tables_arp_exit_net,
69 static const struct nf_chain_type filter_arp = {
71 .type = NFT_CHAIN_T_DEFAULT,
72 .family = NFPROTO_ARP,
74 .hook_mask = (1 << NF_ARP_IN) |
76 (1 << NF_ARP_FORWARD),
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 */