net/ipv6/netfilter/nft_chain_nat_ipv6.c

   1 /*
   2  * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
   3  * Copyright (c) 2012 Intel Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/list.h>
  14 #include <linux/skbuff.h>
  15 #include <linux/ip.h>
  16 #include <linux/netfilter.h>
  17 #include <linux/netfilter_ipv6.h>
  18 #include <linux/netfilter/nf_tables.h>
  19 #include <net/netfilter/nf_conntrack.h>
  20 #include <net/netfilter/nf_nat.h>
  21 #include <net/netfilter/nf_nat_core.h>
  22 #include <net/netfilter/nf_tables.h>
  23 #include <net/netfilter/nf_tables_ipv6.h>
  24 #include <net/netfilter/nf_nat_l3proto.h>
  25 #include <net/ipv6.h>
  26
  27 static unsigned int nft_nat_do_chain(void *priv,
  28                                      struct sk_buff *skb,
  29                                      const struct nf_hook_state *state)
  30 {
  31         struct nft_pktinfo pkt;
  32
  33         nft_set_pktinfo(&pkt, skb, state);
  34         nft_set_pktinfo_ipv6(&pkt, skb);
  35
  36         return nft_do_chain(&pkt, priv);
  37 }
  38
  39 static int nft_nat_ipv6_reg(struct net *net, const struct nf_hook_ops *ops)
  40 {
  41         return nf_nat_l3proto_ipv6_register_fn(net, ops);
  42 }
  43
  44 static void nft_nat_ipv6_unreg(struct net *net, const struct nf_hook_ops *ops)
  45 {
  46         nf_nat_l3proto_ipv6_unregister_fn(net, ops);
  47 }
  48
  49 static const struct nft_chain_type nft_chain_nat_ipv6 = {
  50         .name           = "nat",
  51         .type           = NFT_CHAIN_T_NAT,
  52         .family         = NFPROTO_IPV6,
  53         .owner          = THIS_MODULE,
  54         .hook_mask      = (1 << NF_INET_PRE_ROUTING) |
  55                           (1 << NF_INET_POST_ROUTING) |
  56                           (1 << NF_INET_LOCAL_OUT) |
  57                           (1 << NF_INET_LOCAL_IN),
  58         .hooks          = {
  59                 [NF_INET_PRE_ROUTING]   = nft_nat_do_chain,
  60                 [NF_INET_POST_ROUTING]  = nft_nat_do_chain,
  61                 [NF_INET_LOCAL_OUT]     = nft_nat_do_chain,
  62                 [NF_INET_LOCAL_IN]      = nft_nat_do_chain,
  63         },
  64         .ops_register           = nft_nat_ipv6_reg,
  65         .ops_unregister         = nft_nat_ipv6_unreg,
  66 };
  67
  68 static int __init nft_chain_nat_ipv6_init(void)
  69 {
  70         nft_register_chain_type(&nft_chain_nat_ipv6);
  71
  72         return 0;
  73 }
  74
  75 static void __exit nft_chain_nat_ipv6_exit(void)
  76 {
  77         nft_unregister_chain_type(&nft_chain_nat_ipv6);
  78 }
  79
  80 module_init(nft_chain_nat_ipv6_init);
  81 module_exit(nft_chain_nat_ipv6_exit);
  82
  83 MODULE_LICENSE("GPL");
  84 MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
  85 MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");