/*
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* Copyright (c) 2012-2014 Patrick McHardy <kaber@trash.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/ip.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.h>
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#include <net/netfilter/nf_tables.h>
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#include <net/netfilter/nf_tables_ipv4.h>
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#include <net/netfilter/nf_tables_ipv6.h>
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#include <net/ip.h>
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static void nft_inet_hook_ops_init(struct nf_hook_ops *ops, unsigned int n)
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{
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struct nft_af_info *afi;
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if (n == 1)
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afi = &nft_af_ipv4;
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else
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afi = &nft_af_ipv6;
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ops->pf = afi->family;
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if (afi->hooks[ops->hooknum])
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ops->hook = afi->hooks[ops->hooknum];
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}
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static struct nft_af_info nft_af_inet __read_mostly = {
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.family = NFPROTO_INET,
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.nhooks = NF_INET_NUMHOOKS,
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.owner = THIS_MODULE,
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.nops = 2,
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.hook_ops_init = nft_inet_hook_ops_init,
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};
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static int __net_init nf_tables_inet_init_net(struct net *net)
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{
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net->nft.inet = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
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if (net->nft.inet == NULL)
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return -ENOMEM;
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memcpy(net->nft.inet, &nft_af_inet, sizeof(nft_af_inet));
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if (nft_register_afinfo(net, net->nft.inet) < 0)
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goto err;
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return 0;
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err:
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kfree(net->nft.inet);
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return -ENOMEM;
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}
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static void __net_exit nf_tables_inet_exit_net(struct net *net)
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{
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nft_unregister_afinfo(net, net->nft.inet);
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kfree(net->nft.inet);
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}
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static struct pernet_operations nf_tables_inet_net_ops = {
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.init = nf_tables_inet_init_net,
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.exit = nf_tables_inet_exit_net,
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};
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static const struct nf_chain_type filter_inet = {
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.name = "filter",
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.type = NFT_CHAIN_T_DEFAULT,
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.family = NFPROTO_INET,
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.owner = THIS_MODULE,
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.hook_mask = (1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_LOCAL_OUT) |
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(1 << NF_INET_FORWARD) |
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(1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_POST_ROUTING),
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};
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static int __init nf_tables_inet_init(void)
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{
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int ret;
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ret = nft_register_chain_type(&filter_inet);
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if (ret < 0)
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return ret;
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ret = register_pernet_subsys(&nf_tables_inet_net_ops);
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if (ret < 0)
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nft_unregister_chain_type(&filter_inet);
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return ret;
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}
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static void __exit nf_tables_inet_exit(void)
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{
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unregister_pernet_subsys(&nf_tables_inet_net_ops);
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nft_unregister_chain_type(&filter_inet);
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}
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module_init(nf_tables_inet_init);
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module_exit(nf_tables_inet_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
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MODULE_ALIAS_NFT_FAMILY(1);
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