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 net_device *in,
  31             const struct net_device *out, unsigned int hooknum,
  32             const struct xt_target *target, const void *targinfo)
  33 {
  34         const struct xt_classify_target_info *clinfo = 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                 .family         = AF_INET,
  43                 .name           = "CLASSIFY",
  44                 .target         = classify_tg,
  45                 .targetsize     = sizeof(struct xt_classify_target_info),
  46                 .table          = "mangle",
  47                 .hooks          = (1 << NF_INET_LOCAL_OUT) |
  48                                   (1 << NF_INET_FORWARD) |
  49                                   (1 << NF_INET_POST_ROUTING),
  50                 .me             = THIS_MODULE,
  51         },
  52         {
  53                 .name           = "CLASSIFY",
  54                 .family         = AF_INET6,
  55                 .target         = classify_tg,
  56                 .targetsize     = sizeof(struct xt_classify_target_info),
  57                 .table          = "mangle",
  58                 .hooks          = (1 << NF_INET_LOCAL_OUT) |
  59                                   (1 << NF_INET_FORWARD) |
  60                                   (1 << NF_INET_POST_ROUTING),
  61                 .me             = THIS_MODULE,
  62         },
  63 };
  64
  65 static int __init classify_tg_init(void)
  66 {
  67         return xt_register_targets(classify_tg_reg,
  68                ARRAY_SIZE(classify_tg_reg));
  69 }
  70
  71 static void __exit classify_tg_exit(void)
  72 {
  73         xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
  74 }
  75
  76 module_init(classify_tg_init);
  77 module_exit(classify_tg_exit);