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 #include <linux/netfilter_arp.h>
  23
  24 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  25 MODULE_LICENSE("GPL");
  26 MODULE_DESCRIPTION("Xtables: Qdisc classification");
  27 MODULE_ALIAS("ipt_CLASSIFY");
  28 MODULE_ALIAS("ip6t_CLASSIFY");
  29 MODULE_ALIAS("arpt_CLASSIFY");
  30
  31 static unsigned int
  32 classify_tg(struct sk_buff *skb, const struct xt_action_param *par)
  33 {
  34         const struct xt_classify_target_info *clinfo = par->targinfo;
  35
  36         skb->priority = clinfo->priority;
  37         return XT_CONTINUE;
  38 }
  39
  40 static struct xt_target classify_tg_reg[] __read_mostly = {
  41         {
  42                 .name       = "CLASSIFY",
  43                 .revision   = 0,
  44                 .family     = NFPROTO_UNSPEC,
  45                 .hooks      = (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) |
  46                               (1 << NF_INET_POST_ROUTING),
  47                 .target     = classify_tg,
  48                 .targetsize = sizeof(struct xt_classify_target_info),
  49                 .me         = THIS_MODULE,
  50         },
  51         {
  52                 .name       = "CLASSIFY",
  53                 .revision   = 0,
  54                 .family     = NFPROTO_ARP,
  55                 .hooks      = (1 << NF_ARP_OUT) | (1 << NF_ARP_FORWARD),
  56                 .target     = classify_tg,
  57                 .targetsize = sizeof(struct xt_classify_target_info),
  58                 .me         = THIS_MODULE,
  59         },
  60 };
  61
  62 static int __init classify_tg_init(void)
  63 {
  64         return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
  65 }
  66
  67 static void __exit classify_tg_exit(void)
  68 {
  69         xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
  70 }
  71
  72 module_init(classify_tg_init);
  73 module_exit(classify_tg_exit);