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/*
* xt_mark - Netfilter module to match NFMARK value
*
* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
* Copyright © CC Computer Consultants GmbH, 2007 - 2008
* Jan Engelhardt <jengelh@medozas.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter/xt_mark.h>
#include <linux/netfilter/x_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("Xtables: packet mark match");
MODULE_ALIAS("ipt_mark");
MODULE_ALIAS("ip6t_mark");
static bool
mark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct xt_mark_mtinfo1 *info = par->matchinfo;
return ((skb->mark & info->mask) == info->mark) ^ info->invert;
}
static struct xt_match mark_mt_reg __read_mostly = {
.name = "mark",
.revision = 1,
.family = NFPROTO_UNSPEC,
.match = mark_mt,
.matchsize = sizeof(struct xt_mark_mtinfo1),
.me = THIS_MODULE,
};
static int __init mark_mt_init(void)
{
return xt_register_match(&mark_mt_reg);
}
static void __exit mark_mt_exit(void)
{
xt_unregister_match(&mark_mt_reg);
}
module_init(mark_mt_init);
module_exit(mark_mt_exit);
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