projects / deliverable / linux.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 PM |
17 | static unsigned int |
| 18 | nft_do_chain_arp(const struct nf_hook_ops *ops, | |
| 19 | struct sk_buff *skb, | |
| 20 | const struct net_device *in, | |
| 21 | const struct net_device *out, | |
| 22 | int (*okfn)(struct sk_buff *)) | |
| 23 | { | |
| 24 | struct nft_pktinfo pkt; | |
| 25 | ||
| 26 | nft_set_pktinfo(&pkt, ops, skb, in, out); | |
| 27 | ||
| 3876d22d | 28 | return nft_do_chain(&pkt, ops); |
| 3b088c4b PM |
29 | } |
| 30 | ||
| ed683f13 PNA |
31 | static struct nft_af_info nft_af_arp __read_mostly = { |
| 32 | .family = NFPROTO_ARP, | |
| 33 | .nhooks = NF_ARP_NUMHOOKS, | |
| 34 | .owner = THIS_MODULE, | |
| 115a60b1 | 35 | .nops = 1, |
| 3b088c4b PM |
36 | .hooks = { |
| 37 | [NF_ARP_IN] = nft_do_chain_arp, | |
| 38 | [NF_ARP_OUT] = nft_do_chain_arp, | |
| 39 | [NF_ARP_FORWARD] = nft_do_chain_arp, | |
| 40 | }, | |
| ed683f13 PNA |
41 | }; |
| 42 | ||
| 43 | static int nf_tables_arp_init_net(struct net *net) | |
| 44 | { | |
| 45 | net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL); | |
| 46 | if (net->nft.arp== NULL) | |
| 47 | return -ENOMEM; | |
| 48 | ||
| 49 | memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp)); | |
| 50 | ||
| 51 | if (nft_register_afinfo(net, net->nft.arp) < 0) | |
| 52 | goto err; | |
| 53 | ||
| 54 | return 0; | |
| 55 | err: | |
| 56 | kfree(net->nft.arp); | |
| 57 | return -ENOMEM; | |
| 58 | } | |
| 59 | ||
| 60 | static void nf_tables_arp_exit_net(struct net *net) | |
| 61 | { | |
| 62 | nft_unregister_afinfo(net->nft.arp); | |
| 63 | kfree(net->nft.arp); | |
| 64 | } | |
| 65 | ||
| 66 | static struct pernet_operations nf_tables_arp_net_ops = { | |
| 67 | .init = nf_tables_arp_init_net, | |
| 68 | .exit = nf_tables_arp_exit_net, | |
| 69 | }; | |
| 70 | ||
| 2a37d755 | 71 | static const struct nf_chain_type filter_arp = { |
| ed683f13 PNA |
72 | .name = "filter", |
| 73 | .type = NFT_CHAIN_T_DEFAULT, | |
| fa2c1de0 PM |
74 | .family = NFPROTO_ARP, |
| 75 | .owner = THIS_MODULE, | |
| ed683f13 PNA |
76 | .hook_mask = (1 << NF_ARP_IN) | |
| 77 | (1 << NF_ARP_OUT) | | |
| 78 | (1 << NF_ARP_FORWARD), | |
| ed683f13 PNA |
79 | }; |
| 80 | ||
| 81 | static int __init nf_tables_arp_init(void) | |
| 82 | { | |
| 83 | int ret; | |
| 84 | ||
| 85 | nft_register_chain_type(&filter_arp); | |
| 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 */ |