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("Xtables: packet forwarding to netlink");
  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 nfqueue_tg(struct sk_buff *skb, const struct net_device *in,
  28            const struct net_device *out, unsigned int hooknum,
  29            const struct xt_target *target, const void *targinfo)
  30 {
  31         const struct xt_NFQ_info *tinfo = targinfo;
  32
  33         return NF_QUEUE_NR(tinfo->queuenum);
  34 }
  35
  36 static struct xt_target nfqueue_tg_reg[] __read_mostly = {
  37         {
  38                 .name           = "NFQUEUE",
  39                 .family         = AF_INET,
  40                 .target         = nfqueue_tg,
  41                 .targetsize     = sizeof(struct xt_NFQ_info),
  42                 .me             = THIS_MODULE,
  43         },
  44         {
  45                 .name           = "NFQUEUE",
  46                 .family         = AF_INET6,
  47                 .target         = nfqueue_tg,
  48                 .targetsize     = sizeof(struct xt_NFQ_info),
  49                 .me             = THIS_MODULE,
  50         },
  51         {
  52                 .name           = "NFQUEUE",
  53                 .family         = NF_ARP,
  54                 .target         = nfqueue_tg,
  55                 .targetsize     = sizeof(struct xt_NFQ_info),
  56                 .me             = THIS_MODULE,
  57         },
  58 };
  59
  60 static int __init nfqueue_tg_init(void)
  61 {
  62         return xt_register_targets(nfqueue_tg_reg, ARRAY_SIZE(nfqueue_tg_reg));
  63 }
  64
  65 static void __exit nfqueue_tg_exit(void)
  66 {
  67         xt_unregister_targets(nfqueue_tg_reg, ARRAY_SIZE(nfqueue_tg_reg));
  68 }
  69
  70 module_init(nfqueue_tg_init);
  71 module_exit(nfqueue_tg_exit);