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 **pskb,
  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        void *userinfo)
  34 {
  35         const struct xt_NFQ_info *tinfo = targinfo;
  36
  37         return NF_QUEUE_NR(tinfo->queuenum);
  38 }
  39
  40 static struct xt_target ipt_NFQ_reg = {
  41         .name           = "NFQUEUE",
  42         .target         = target,
  43         .targetsize     = sizeof(struct xt_NFQ_info),
  44         .family         = AF_INET,
  45         .me             = THIS_MODULE,
  46 };
  47
  48 static struct xt_target ip6t_NFQ_reg = {
  49         .name           = "NFQUEUE",
  50         .target         = target,
  51         .targetsize     = sizeof(struct xt_NFQ_info),
  52         .family         = AF_INET6,
  53         .me             = THIS_MODULE,
  54 };
  55
  56 static struct xt_target arpt_NFQ_reg = {
  57         .name           = "NFQUEUE",
  58         .target         = target,
  59         .targetsize     = sizeof(struct xt_NFQ_info),
  60         .family         = NF_ARP,
  61         .me             = THIS_MODULE,
  62 };
  63
  64 static int __init xt_nfqueue_init(void)
  65 {
  66         int ret;
  67         ret = xt_register_target(&ipt_NFQ_reg);
  68         if (ret)
  69                 return ret;
  70         ret = xt_register_target(&ip6t_NFQ_reg);
  71         if (ret)
  72                 goto out_ip;
  73         ret = xt_register_target(&arpt_NFQ_reg);
  74         if (ret)
  75                 goto out_ip6;
  76
  77         return ret;
  78 out_ip6:
  79         xt_unregister_target(&ip6t_NFQ_reg);
  80 out_ip:
  81         xt_unregister_target(&ipt_NFQ_reg);
  82
  83         return ret;
  84 }
  85
  86 static void __exit xt_nfqueue_fini(void)
  87 {
  88         xt_unregister_target(&arpt_NFQ_reg);
  89         xt_unregister_target(&ip6t_NFQ_reg);
  90         xt_unregister_target(&ipt_NFQ_reg);
  91 }
  92
  93 module_init(xt_nfqueue_init);
  94 module_exit(xt_nfqueue_fini);