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(const struct nf_hook_ops *ops,
  28                                      struct sk_buff *skb,
  29                                      const struct net_device *in,
  30                                      const struct net_device *out,
  31                                      struct nf_conn *ct)
  32 {
  33         struct nft_pktinfo pkt;
  34
  35         nft_set_pktinfo_ipv6(&pkt, ops, skb, in, out);
  36
  37         return nft_do_chain(&pkt, ops);
  38 }
  39
  40 static unsigned int nft_nat_ipv6_fn(const struct nf_hook_ops *ops,
  41                                     struct sk_buff *skb,
  42                                     const struct net_device *in,
  43                                     const struct net_device *out,
  44                                     int (*okfn)(struct sk_buff *))
  45 {
  46         return nf_nat_ipv6_fn(ops, skb, in, out, nft_nat_do_chain);
  47 }
  48
  49 static unsigned int nft_nat_ipv6_in(const struct nf_hook_ops *ops,
  50                                     struct sk_buff *skb,
  51                                     const struct net_device *in,
  52                                     const struct net_device *out,
  53                                     int (*okfn)(struct sk_buff *))
  54 {
  55         return nf_nat_ipv6_in(ops, skb, in, out, nft_nat_do_chain);
  56 }
  57
  58 static unsigned int nft_nat_ipv6_out(const struct nf_hook_ops *ops,
  59                                      struct sk_buff *skb,
  60                                      const struct net_device *in,
  61                                      const struct net_device *out,
  62                                      int (*okfn)(struct sk_buff *))
  63 {
  64         return nf_nat_ipv6_out(ops, skb, in, out, nft_nat_do_chain);
  65 }
  66
  67 static unsigned int nft_nat_ipv6_local_fn(const struct nf_hook_ops *ops,
  68                                           struct sk_buff *skb,
  69                                           const struct net_device *in,
  70                                           const struct net_device *out,
  71                                           int (*okfn)(struct sk_buff *))
  72 {
  73         return nf_nat_ipv6_local_fn(ops, skb, in, out, nft_nat_do_chain);
  74 }
  75
  76 static const struct nf_chain_type nft_chain_nat_ipv6 = {
  77         .name           = "nat",
  78         .type           = NFT_CHAIN_T_NAT,
  79         .family         = NFPROTO_IPV6,
  80         .owner          = THIS_MODULE,
  81         .hook_mask      = (1 << NF_INET_PRE_ROUTING) |
  82                           (1 << NF_INET_POST_ROUTING) |
  83                           (1 << NF_INET_LOCAL_OUT) |
  84                           (1 << NF_INET_LOCAL_IN),
  85         .hooks          = {
  86                 [NF_INET_PRE_ROUTING]   = nft_nat_ipv6_in,
  87                 [NF_INET_POST_ROUTING]  = nft_nat_ipv6_out,
  88                 [NF_INET_LOCAL_OUT]     = nft_nat_ipv6_local_fn,
  89                 [NF_INET_LOCAL_IN]      = nft_nat_ipv6_fn,
  90         },
  91 };
  92
  93 static int __init nft_chain_nat_ipv6_init(void)
  94 {
  95         int err;
  96
  97         err = nft_register_chain_type(&nft_chain_nat_ipv6);
  98         if (err < 0)
  99                 return err;
 100
 101         return 0;
 102 }
 103
 104 static void __exit nft_chain_nat_ipv6_exit(void)
 105 {
 106         nft_unregister_chain_type(&nft_chain_nat_ipv6);
 107 }
 108
 109 module_init(nft_chain_nat_ipv6_init);
 110 module_exit(nft_chain_nat_ipv6_exit);
 111
 112 MODULE_LICENSE("GPL");
 113 MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
 114 MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");