net/netfilter/xt_NFQUEUE.c

   1 /* iptables module for using new netfilter netlink queue
   2  *
   3  * (C) 2005 by Harald Welte <laforge@netfilter.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/skbuff.h>
  13
  14 #include <linux/netfilter.h>
  15 #include <linux/netfilter_arp.h>
  16 #include <linux/netfilter/x_tables.h>
  17 #include <linux/netfilter/xt_NFQUEUE.h>
  18
  19 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
  20 MODULE_DESCRIPTION("[ip,ip6,arp]_tables NFQUEUE target");
  21 MODULE_LICENSE("GPL");
  22 MODULE_ALIAS("ipt_NFQUEUE");
  23 MODULE_ALIAS("ip6t_NFQUEUE");
  24 MODULE_ALIAS("arpt_NFQUEUE");
  25
  26 static unsigned int
  27 target(struct sk_buff *skb,
  28        const struct net_device *in,
  29        const struct net_device *out,
  30        unsigned int hooknum,
  31        const struct xt_target *target,
  32        const void *targinfo)
  33 {
  34         const struct xt_NFQ_info *tinfo = targinfo;
  35
  36         return NF_QUEUE_NR(tinfo->queuenum);
  37 }
  38
  39 static struct xt_target xt_nfqueue_target[] __read_mostly = {
  40         {
  41                 .name           = "NFQUEUE",
  42                 .family         = AF_INET,
  43                 .target         = target,
  44                 .targetsize     = sizeof(struct xt_NFQ_info),
  45                 .me             = THIS_MODULE,
  46         },
  47         {
  48                 .name           = "NFQUEUE",
  49                 .family         = AF_INET6,
  50                 .target         = target,
  51                 .targetsize     = sizeof(struct xt_NFQ_info),
  52                 .me             = THIS_MODULE,
  53         },
  54         {
  55                 .name           = "NFQUEUE",
  56                 .family         = NF_ARP,
  57                 .target         = target,
  58                 .targetsize     = sizeof(struct xt_NFQ_info),
  59                 .me             = THIS_MODULE,
  60         },
  61 };
  62
  63 static int __init xt_nfqueue_init(void)
  64 {
  65         return xt_register_targets(xt_nfqueue_target,
  66                                    ARRAY_SIZE(xt_nfqueue_target));
  67 }
  68
  69 static void __exit xt_nfqueue_fini(void)
  70 {
  71         xt_unregister_targets(xt_nfqueue_target, ARRAY_SIZE(xt_nfqueue_target));
  72 }
  73
  74 module_init(xt_nfqueue_init);
  75 module_exit(xt_nfqueue_fini);