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/* Kernel module to match TOS values. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
*
* 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/ip.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter_ipv4/ipt_tos.h>
#include <linux/netfilter/x_tables.h>
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("iptables TOS match module");
static int
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
int *hotdrop)
{
const struct ipt_tos_info *info = matchinfo;
return (skb->nh.iph->tos == info->tos) ^ info->invert;
}
static struct xt_match tos_match = {
.name = "tos",
.family = AF_INET,
.match = match,
.matchsize = sizeof(struct ipt_tos_info),
.me = THIS_MODULE,
};
static int __init ipt_multiport_init(void)
{
return xt_register_match(&tos_match);
}
static void __exit ipt_multiport_fini(void)
{
xt_unregister_match(&tos_match);
}
module_init(ipt_multiport_init);
module_exit(ipt_multiport_fini);
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