linux/net/netfilter/xt_CLASSIFY.c
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   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
  24MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  25MODULE_LICENSE("GPL");
  26MODULE_DESCRIPTION("Xtables: Qdisc classification");
  27MODULE_ALIAS("ipt_CLASSIFY");
  28MODULE_ALIAS("ip6t_CLASSIFY");
  29MODULE_ALIAS("arpt_CLASSIFY");
  30
  31static unsigned int
  32classify_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
  40static 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
  62static int __init classify_tg_init(void)
  63{
  64        return xt_register_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
  65}
  66
  67static void __exit classify_tg_exit(void)
  68{
  69        xt_unregister_targets(classify_tg_reg, ARRAY_SIZE(classify_tg_reg));
  70}
  71
  72module_init(classify_tg_init);
  73module_exit(classify_tg_exit);
  74
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