Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008-2010 Patrick McHardy <kaber@trash.net> |
| 3 | * Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.org> |
| 4 | * |
| 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. |
| 8 | * |
| 9 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/netfilter_arp.h> |
| 15 | #include <net/netfilter/nf_tables.h> |
| 16 | |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 17 | static unsigned int |
Eric W. Biederman | 06198b3 | 2015-09-18 14:33:06 -0500 | [diff] [blame] | 18 | nft_do_chain_arp(void *priv, |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 19 | struct sk_buff *skb, |
David S. Miller | 238e54c | 2015-04-03 20:32:56 -0400 | [diff] [blame] | 20 | const struct nf_hook_state *state) |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 21 | { |
| 22 | struct nft_pktinfo pkt; |
| 23 | |
Pablo Neira Ayuso | beac5af | 2016-09-09 12:42:49 +0200 | [diff] [blame] | 24 | nft_set_pktinfo_unspec(&pkt, skb, state); |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 25 | |
Eric W. Biederman | 06198b3 | 2015-09-18 14:33:06 -0500 | [diff] [blame] | 26 | return nft_do_chain(&pkt, priv); |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 27 | } |
| 28 | |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 29 | static struct nft_af_info nft_af_arp __read_mostly = { |
| 30 | .family = NFPROTO_ARP, |
| 31 | .nhooks = NF_ARP_NUMHOOKS, |
| 32 | .owner = THIS_MODULE, |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 33 | .nops = 1, |
Patrick McHardy | 3b088c4 | 2014-01-03 12:16:13 +0000 | [diff] [blame] | 34 | .hooks = { |
| 35 | [NF_ARP_IN] = nft_do_chain_arp, |
| 36 | [NF_ARP_OUT] = nft_do_chain_arp, |
| 37 | [NF_ARP_FORWARD] = nft_do_chain_arp, |
| 38 | }, |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 39 | }; |
| 40 | |
| 41 | static int nf_tables_arp_init_net(struct net *net) |
| 42 | { |
| 43 | net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL); |
| 44 | if (net->nft.arp== NULL) |
| 45 | return -ENOMEM; |
| 46 | |
| 47 | memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp)); |
| 48 | |
| 49 | if (nft_register_afinfo(net, net->nft.arp) < 0) |
| 50 | goto err; |
| 51 | |
| 52 | return 0; |
| 53 | err: |
| 54 | kfree(net->nft.arp); |
| 55 | return -ENOMEM; |
| 56 | } |
| 57 | |
| 58 | static void nf_tables_arp_exit_net(struct net *net) |
| 59 | { |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 60 | nft_unregister_afinfo(net, net->nft.arp); |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 61 | kfree(net->nft.arp); |
| 62 | } |
| 63 | |
| 64 | static struct pernet_operations nf_tables_arp_net_ops = { |
| 65 | .init = nf_tables_arp_init_net, |
| 66 | .exit = nf_tables_arp_exit_net, |
| 67 | }; |
| 68 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 69 | static const struct nf_chain_type filter_arp = { |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 70 | .name = "filter", |
| 71 | .type = NFT_CHAIN_T_DEFAULT, |
Patrick McHardy | fa2c1de | 2014-01-09 18:42:38 +0000 | [diff] [blame] | 72 | .family = NFPROTO_ARP, |
| 73 | .owner = THIS_MODULE, |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 74 | .hook_mask = (1 << NF_ARP_IN) | |
| 75 | (1 << NF_ARP_OUT) | |
| 76 | (1 << NF_ARP_FORWARD), |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 77 | }; |
| 78 | |
| 79 | static int __init nf_tables_arp_init(void) |
| 80 | { |
| 81 | int ret; |
| 82 | |
Gao Feng | 23d0750 | 2016-09-10 10:04:30 +0800 | [diff] [blame] | 83 | ret = nft_register_chain_type(&filter_arp); |
| 84 | if (ret < 0) |
| 85 | return ret; |
| 86 | |
Pablo Neira Ayuso | ed683f1 | 2013-10-07 22:53:08 +0200 | [diff] [blame] | 87 | ret = register_pernet_subsys(&nf_tables_arp_net_ops); |
| 88 | if (ret < 0) |
| 89 | nft_unregister_chain_type(&filter_arp); |
| 90 | |
| 91 | return ret; |
| 92 | } |
| 93 | |
| 94 | static void __exit nf_tables_arp_exit(void) |
| 95 | { |
| 96 | unregister_pernet_subsys(&nf_tables_arp_net_ops); |
| 97 | nft_unregister_chain_type(&filter_arp); |
| 98 | } |
| 99 | |
| 100 | module_init(nf_tables_arp_init); |
| 101 | module_exit(nf_tables_arp_exit); |
| 102 | |
| 103 | MODULE_LICENSE("GPL"); |
| 104 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 105 | MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */ |