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 net_device *in,
21 const struct net_device *out,
22 int (*okfn)(struct sk_buff *))
24 struct nft_pktinfo pkt;
26 nft_set_pktinfo(&pkt, ops, skb, in, out);
28 return nft_do_chain(&pkt, ops);
31 static struct nft_af_info nft_af_arp __read_mostly = {
32 .family = NFPROTO_ARP,
33 .nhooks = NF_ARP_NUMHOOKS,
37 [NF_ARP_IN] = nft_do_chain_arp,
38 [NF_ARP_OUT] = nft_do_chain_arp,
39 [NF_ARP_FORWARD] = nft_do_chain_arp,
43 static int nf_tables_arp_init_net(struct net *net)
45 net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
46 if (net->nft.arp== NULL)
49 memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp));
51 if (nft_register_afinfo(net, net->nft.arp) < 0)
60 static void nf_tables_arp_exit_net(struct net *net)
62 nft_unregister_afinfo(net->nft.arp);
66 static struct pernet_operations nf_tables_arp_net_ops = {
67 .init = nf_tables_arp_init_net,
68 .exit = nf_tables_arp_exit_net,
71 static const struct nf_chain_type filter_arp = {
73 .type = NFT_CHAIN_T_DEFAULT,
74 .family = NFPROTO_ARP,
76 .hook_mask = (1 << NF_ARP_IN) |
78 (1 << NF_ARP_FORWARD),
81 static int __init nf_tables_arp_init(void)
85 nft_register_chain_type(&filter_arp);
86 ret = register_pernet_subsys(&nf_tables_arp_net_ops);
88 nft_unregister_chain_type(&filter_arp);
93 static void __exit nf_tables_arp_exit(void)
95 unregister_pernet_subsys(&nf_tables_arp_net_ops);
96 nft_unregister_chain_type(&filter_arp);
99 module_init(nf_tables_arp_init);
100 module_exit(nf_tables_arp_exit);
102 MODULE_LICENSE("GPL");
103 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
104 MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */