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("iptables qdisc classification target module");
  26 MODULE_ALIAS("ipt_CLASSIFY");
  27 MODULE_ALIAS("ip6t_CLASSIFY");
  28
  29 static unsigned int
  30 target(struct sk_buff *skb,
  31        const struct net_device *in,
  32        const struct net_device *out,
  33        unsigned int hooknum,
  34        const struct xt_target *target,
  35        const void *targinfo)
  36 {
  37         const struct xt_classify_target_info *clinfo = targinfo;
  38
  39         skb->priority = clinfo->priority;
  40         return XT_CONTINUE;
  41 }
  42
  43 static struct xt_target xt_classify_target[] __read_mostly = {
  44         {
  45                 .family         = AF_INET,
  46                 .name           = "CLASSIFY",
  47                 .target         = target,
  48                 .targetsize     = sizeof(struct xt_classify_target_info),
  49                 .table          = "mangle",
  50                 .hooks          = (1 << NF_IP_LOCAL_OUT) |
  51                                   (1 << NF_IP_FORWARD) |
  52                                   (1 << NF_IP_POST_ROUTING),
  53                 .me             = THIS_MODULE,
  54         },
  55         {
  56                 .name           = "CLASSIFY",
  57                 .family         = AF_INET6,
  58                 .target         = target,
  59                 .targetsize     = sizeof(struct xt_classify_target_info),
  60                 .table          = "mangle",
  61                 .hooks          = (1 << NF_IP6_LOCAL_OUT) |
  62                                   (1 << NF_IP6_FORWARD) |
  63                                   (1 << NF_IP6_POST_ROUTING),
  64                 .me             = THIS_MODULE,
  65         },
  66 };
  67
  68 static int __init xt_classify_init(void)
  69 {
  70         return xt_register_targets(xt_classify_target,
  71                                    ARRAY_SIZE(xt_classify_target));
  72 }
  73
  74 static void __exit xt_classify_fini(void)
  75 {
  76         xt_unregister_targets(xt_classify_target,
  77                               ARRAY_SIZE(xt_classify_target));
  78 }
  79
  80 module_init(xt_classify_init);
  81 module_exit(xt_classify_fini);