projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ed683f13 PNA |
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 | ||
| 3b088c4b | 17 | static unsigned int |
| 06198b34 | 18 | nft_do_chain_arp(void *priv, |
| 3b088c4b | 19 | struct sk_buff *skb, |
| 238e54c9 | 20 | const struct nf_hook_state *state) |
| 3b088c4b PM |
21 | { |
| 22 | struct nft_pktinfo pkt; | |
| 23 | ||
| beac5afa | 24 | nft_set_pktinfo_unspec(&pkt, skb, state); |
| 3b088c4b | 25 | |
| 06198b34 | 26 | return nft_do_chain(&pkt, priv); |
| 3b088c4b PM |
27 | } |
| 28 | ||
| ed683f13 PNA |
29 | static struct nft_af_info nft_af_arp __read_mostly = { |
| 30 | .family = NFPROTO_ARP, | |
| 31 | .nhooks = NF_ARP_NUMHOOKS, | |
| 32 | .owner = THIS_MODULE, | |
| 115a60b1 | 33 | .nops = 1, |
| 3b088c4b PM |
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 | }, | |
| ed683f13 PNA |
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 | { | |
| df05ef87 | 60 | nft_unregister_afinfo(net, net->nft.arp); |
| ed683f13 PNA |
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 | ||
| 2a37d755 | 69 | static const struct nf_chain_type filter_arp = { |
| ed683f13 PNA |
70 | .name = "filter", |
| 71 | .type = NFT_CHAIN_T_DEFAULT, | |
| fa2c1de0 PM |
72 | .family = NFPROTO_ARP, |
| 73 | .owner = THIS_MODULE, | |
| ed683f13 | 74 | .hook_mask = (1 << NF_ARP_IN) | |
| 974292de | 75 | (1 << NF_ARP_OUT), |
| ed683f13 PNA |
76 | }; |
| 77 | ||
| 78 | static int __init nf_tables_arp_init(void) | |
| 79 | { | |
| 80 | int ret; | |
| 81 | ||
| 23d07508 GF |
82 | ret = nft_register_chain_type(&filter_arp); |
| 83 | if (ret < 0) | |
| 84 | return ret; | |
| 85 | ||
| ed683f13 PNA |
86 | ret = register_pernet_subsys(&nf_tables_arp_net_ops); |
| 87 | if (ret < 0) | |
| 88 | nft_unregister_chain_type(&filter_arp); | |
| 89 | ||
| 90 | return ret; | |
| 91 | } | |
| 92 | ||
| 93 | static void __exit nf_tables_arp_exit(void) | |
| 94 | { | |
| 95 | unregister_pernet_subsys(&nf_tables_arp_net_ops); | |
| 96 | nft_unregister_chain_type(&filter_arp); | |
| 97 | } | |
| 98 | ||
| 99 | module_init(nf_tables_arp_init); | |
| 100 | module_exit(nf_tables_arp_exit); | |
| 101 | ||
| 102 | MODULE_LICENSE("GPL"); | |
| 103 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
| 104 | MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */ |