Commit | Line | Data |
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1da177e4 LT |
1 | /* Kernel module to match TOS values. */ |
2 | ||
3 | /* (C) 1999-2001 Paul `Rusty' Russell | |
4 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
6709dbbb | 11 | #include <linux/ip.h> |
1da177e4 LT |
12 | #include <linux/module.h> |
13 | #include <linux/skbuff.h> | |
14 | ||
15 | #include <linux/netfilter_ipv4/ipt_tos.h> | |
6709dbbb | 16 | #include <linux/netfilter/x_tables.h> |
1da177e4 LT |
17 | |
18 | MODULE_LICENSE("GPL"); | |
19 | MODULE_DESCRIPTION("iptables TOS match module"); | |
20 | ||
21 | static int | |
22 | match(const struct sk_buff *skb, | |
23 | const struct net_device *in, | |
24 | const struct net_device *out, | |
c4986734 | 25 | const struct xt_match *match, |
1da177e4 LT |
26 | const void *matchinfo, |
27 | int offset, | |
2e4e6a17 | 28 | unsigned int protoff, |
1da177e4 LT |
29 | int *hotdrop) |
30 | { | |
31 | const struct ipt_tos_info *info = matchinfo; | |
32 | ||
eddc9ec5 | 33 | return (ip_hdr(skb)->tos == info->tos) ^ info->invert; |
1da177e4 LT |
34 | } |
35 | ||
6709dbbb | 36 | static struct xt_match tos_match = { |
1da177e4 | 37 | .name = "tos", |
6709dbbb | 38 | .family = AF_INET, |
1d5cd909 PM |
39 | .match = match, |
40 | .matchsize = sizeof(struct ipt_tos_info), | |
1da177e4 LT |
41 | .me = THIS_MODULE, |
42 | }; | |
43 | ||
65b4b4e8 | 44 | static int __init ipt_multiport_init(void) |
1da177e4 | 45 | { |
6709dbbb | 46 | return xt_register_match(&tos_match); |
1da177e4 LT |
47 | } |
48 | ||
65b4b4e8 | 49 | static void __exit ipt_multiport_fini(void) |
1da177e4 | 50 | { |
6709dbbb | 51 | xt_unregister_match(&tos_match); |
1da177e4 LT |
52 | } |
53 | ||
65b4b4e8 AM |
54 | module_init(ipt_multiport_init); |
55 | module_exit(ipt_multiport_fini); |