release/src-rt-6.x.4708/linux/linux-2.6.36/net/netfilter/xt_CLASSIFY.c

   1 /*
   2  * This is a module which is used for setting the skb->priority field
   3  * of an skb for qdisc classification.
   4  */
   5
   6 /* (C) 2001-2002 Patrick McHardy <kaber@trash.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/skbuff.h>
  15 #include <linux/ip.h>
  16 #include <net/checksum.h>
  17
  18 #include <linux/netfilter_ipv4.h>
  19 #include <linux/netfilter_ipv6.h>
  20 #include <linux/netfilter/x_tables.h>
  21 #include <linux/netfilter/xt_CLASSIFY.h>
  22
  23 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  24 MODULE_LICENSE("GPL");
  25 MODULE_DESCRIPTION("Xtables: Qdisc classification");
  26 MODULE_ALIAS("ipt_CLASSIFY");
  27 MODULE_ALIAS("ip6t_CLASSIFY");
  28
  29 static unsigned int
  30 classify_tg(struct sk_buff *skb, const struct xt_action_param *par)
  31 {
  32         const struct xt_classify_target_info *clinfo = par->targinfo;
  33
  34         skb->priority = clinfo->priority;
  35         return XT_CONTINUE;
  36 }
  37
  38 static struct xt_target classify_tg_reg __read_mostly = {
  39         .name       = "CLASSIFY",
  40         .revision   = 0,
  41         .family     = NFPROTO_UNSPEC,
  42         .table      = "mangle",
  43         .hooks      = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
  44                       (1 << NF_INET_POST_ROUTING),
  45         .target     = classify_tg,
  46         .targetsize = sizeof(struct xt_classify_target_info),
  47         .me         = THIS_MODULE,
  48 };
  49
  50 static int __init classify_tg_init(void)
  51 {
  52         return xt_register_target(&classify_tg_reg);
  53 }
  54
  55 static void __exit classify_tg_exit(void)
  56 {
  57         xt_unregister_target(&classify_tg_reg);
  58 }
  59
  60 module_init(classify_tg_init);
  61 module_exit(classify_tg_exit);