blob: 7d608682584046bb0073a5c8effcf5e7d69e54d0 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/* 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 bool
tos_mt(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, bool *hotdrop)
{
const struct ipt_tos_info *info = matchinfo;
return (ip_hdr(skb)->tos == info->tos) ^ info->invert;
}
static struct xt_match tos_mt_reg __read_mostly = {
.name = "tos",
.family = AF_INET,
.match = tos_mt,
.matchsize = sizeof(struct ipt_tos_info),
.me = THIS_MODULE,
};
static int __init tos_mt_init(void)
{
return xt_register_match(&tos_mt_reg);
}
static void __exit tos_mt_exit(void)
{
xt_unregister_match(&tos_mt_reg);
}
module_init(tos_mt_init);
module_exit(tos_mt_exit);
|
