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- /*
- * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
- * Copyright (c) 2012-2013 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/init.h>
- #include <linux/module.h>
- #include <linux/ipv6.h>
- #include <linux/netfilter_ipv6.h>
- #include <net/netfilter/nf_tables.h>
- #include <net/netfilter/nf_tables_ipv6.h>
- static unsigned int nft_do_chain_ipv6(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- struct nft_pktinfo pkt;
- /* malformed packet, drop it */
- if (nft_set_pktinfo_ipv6(&pkt, skb, state) < 0)
- return NF_DROP;
- return nft_do_chain(&pkt, priv);
- }
- static unsigned int nft_ipv6_output(void *priv,
- struct sk_buff *skb,
- const struct nf_hook_state *state)
- {
- if (unlikely(skb->len < sizeof(struct ipv6hdr))) {
- if (net_ratelimit())
- pr_info("nf_tables_ipv6: ignoring short SOCK_RAW "
- "packet\n");
- return NF_ACCEPT;
- }
- return nft_do_chain_ipv6(priv, skb, state);
- }
- struct nft_af_info nft_af_ipv6 __read_mostly = {
- .family = NFPROTO_IPV6,
- .nhooks = NF_INET_NUMHOOKS,
- .owner = THIS_MODULE,
- .nops = 1,
- .hooks = {
- [NF_INET_LOCAL_IN] = nft_do_chain_ipv6,
- [NF_INET_LOCAL_OUT] = nft_ipv6_output,
- [NF_INET_FORWARD] = nft_do_chain_ipv6,
- [NF_INET_PRE_ROUTING] = nft_do_chain_ipv6,
- [NF_INET_POST_ROUTING] = nft_do_chain_ipv6,
- },
- };
- EXPORT_SYMBOL_GPL(nft_af_ipv6);
- static int nf_tables_ipv6_init_net(struct net *net)
- {
- net->nft.ipv6 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
- if (net->nft.ipv6 == NULL)
- return -ENOMEM;
- memcpy(net->nft.ipv6, &nft_af_ipv6, sizeof(nft_af_ipv6));
- if (nft_register_afinfo(net, net->nft.ipv6) < 0)
- goto err;
- return 0;
- err:
- kfree(net->nft.ipv6);
- return -ENOMEM;
- }
- static void nf_tables_ipv6_exit_net(struct net *net)
- {
- nft_unregister_afinfo(net->nft.ipv6);
- kfree(net->nft.ipv6);
- }
- static struct pernet_operations nf_tables_ipv6_net_ops = {
- .init = nf_tables_ipv6_init_net,
- .exit = nf_tables_ipv6_exit_net,
- };
- static const struct nf_chain_type filter_ipv6 = {
- .name = "filter",
- .type = NFT_CHAIN_T_DEFAULT,
- .family = NFPROTO_IPV6,
- .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_ipv6_init(void)
- {
- int ret;
- nft_register_chain_type(&filter_ipv6);
- ret = register_pernet_subsys(&nf_tables_ipv6_net_ops);
- if (ret < 0)
- nft_unregister_chain_type(&filter_ipv6);
- return ret;
- }
- static void __exit nf_tables_ipv6_exit(void)
- {
- unregister_pernet_subsys(&nf_tables_ipv6_net_ops);
- nft_unregister_chain_type(&filter_ipv6);
- }
- module_init(nf_tables_ipv6_init);
- module_exit(nf_tables_ipv6_exit);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
- MODULE_ALIAS_NFT_FAMILY(AF_INET6);
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