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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->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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