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         .me             = THIS_MODULE,
  45 };
  46
  47 static struct xt_target ip6t_NFQ_reg = {
  48         .name           = "NFQUEUE",
  49         .target         = target,
  50         .targetsize     = sizeof(struct xt_NFQ_info),
  51         .me             = THIS_MODULE,
  52 };
  53
  54 static struct xt_target arpt_NFQ_reg = {
  55         .name           = "NFQUEUE",
  56         .target         = target,
  57         .targetsize     = sizeof(struct xt_NFQ_info),
  58         .me             = THIS_MODULE,
  59 };
  60
  61 static int __init init(void)
  62 {
  63         int ret;
  64         ret = xt_register_target(AF_INET, &ipt_NFQ_reg);
  65         if (ret)
  66                 return ret;
  67         ret = xt_register_target(AF_INET6, &ip6t_NFQ_reg);
  68         if (ret)
  69                 goto out_ip;
  70         ret = xt_register_target(NF_ARP, &arpt_NFQ_reg);
  71         if (ret)
  72                 goto out_ip6;
  73
  74         return ret;
  75 out_ip6:
  76         xt_unregister_target(AF_INET6, &ip6t_NFQ_reg);
  77 out_ip:
  78         xt_unregister_target(AF_INET, &ipt_NFQ_reg);
  79
  80         return ret;
  81 }
  82
  83 static void __exit fini(void)
  84 {
  85         xt_unregister_target(NF_ARP, &arpt_NFQ_reg);
  86         xt_unregister_target(AF_INET6, &ip6t_NFQ_reg);
  87         xt_unregister_target(AF_INET, &ipt_NFQ_reg);
  88 }
  89
  90 module_init(init);
  91 module_exit(fini);