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