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- /*
- * Copyright (c) 2008-2010 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.org>
- *
- * 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.
- *
- * Development of this code funded by Astaro AG (http://www.astaro.com/)
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/netfilter_arp.h>
- #include <net/netfilter/nf_tables.h>
- static unsigned int
- nft_do_chain_arp(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- struct nft_pktinfo pkt;
- nft_set_pktinfo(&pkt, skb, state);
- return nft_do_chain(&pkt, priv);
- }
- static struct nft_af_info nft_af_arp __read_mostly = {
- .family = NFPROTO_ARP,
- .nhooks = NF_ARP_NUMHOOKS,
- .owner = THIS_MODULE,
- .nops = 1,
- .hooks = {
- [NF_ARP_IN] = nft_do_chain_arp,
- [NF_ARP_OUT] = nft_do_chain_arp,
- [NF_ARP_FORWARD] = nft_do_chain_arp,
- },
- };
- static int nf_tables_arp_init_net(struct net *net)
- {
- net->nft.arp = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
- if (net->nft.arp== NULL)
- return -ENOMEM;
- memcpy(net->nft.arp, &nft_af_arp, sizeof(nft_af_arp));
- if (nft_register_afinfo(net, net->nft.arp) < 0)
- goto err;
- return 0;
- err:
- kfree(net->nft.arp);
- return -ENOMEM;
- }
- static void nf_tables_arp_exit_net(struct net *net)
- {
- nft_unregister_afinfo(net->nft.arp);
- kfree(net->nft.arp);
- }
- static struct pernet_operations nf_tables_arp_net_ops = {
- .init = nf_tables_arp_init_net,
- .exit = nf_tables_arp_exit_net,
- };
- static const struct nf_chain_type filter_arp = {
- .name = "filter",
- .type = NFT_CHAIN_T_DEFAULT,
- .family = NFPROTO_ARP,
- .owner = THIS_MODULE,
- .hook_mask = (1 << NF_ARP_IN) |
- (1 << NF_ARP_OUT) |
- (1 << NF_ARP_FORWARD),
- };
- static int __init nf_tables_arp_init(void)
- {
- int ret;
- nft_register_chain_type(&filter_arp);
- ret = register_pernet_subsys(&nf_tables_arp_net_ops);
- if (ret < 0)
- nft_unregister_chain_type(&filter_arp);
- return ret;
- }
- static void __exit nf_tables_arp_exit(void)
- {
- unregister_pernet_subsys(&nf_tables_arp_net_ops);
- nft_unregister_chain_type(&filter_arp);
- }
- module_init(nf_tables_arp_init);
- module_exit(nf_tables_arp_exit);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
- MODULE_ALIAS_NFT_FAMILY(3); /* NFPROTO_ARP */
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