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e0a812ae JE |
1 | /* |
2 | * xt_MARK - Netfilter module to modify the NFMARK field of an skb | |
3 | * | |
4 | * (C) 1999-2001 Marc Boucher <marc@mbsi.ca> | |
5 | * Copyright © CC Computer Consultants GmbH, 2007 - 2008 | |
6 | * Jan Engelhardt <jengelh@computergmbh.de> | |
1da177e4 | 7 | * |
e0a812ae JE |
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. | |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/ip.h> | |
16 | #include <net/checksum.h> | |
17 | ||
2e4e6a17 HW |
18 | #include <linux/netfilter/x_tables.h> |
19 | #include <linux/netfilter/xt_MARK.h> | |
1da177e4 LT |
20 | |
21 | MODULE_LICENSE("GPL"); | |
22 | MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>"); | |
2ae15b64 | 23 | MODULE_DESCRIPTION("Xtables: packet mark modification"); |
2e4e6a17 HW |
24 | MODULE_ALIAS("ipt_MARK"); |
25 | MODULE_ALIAS("ip6t_MARK"); | |
1da177e4 | 26 | |
e0a812ae | 27 | static unsigned int |
7eb35586 | 28 | mark_tg(struct sk_buff *skb, const struct xt_target_param *par) |
e0a812ae | 29 | { |
7eb35586 | 30 | const struct xt_mark_tginfo2 *info = par->targinfo; |
e0a812ae JE |
31 | |
32 | skb->mark = (skb->mark & ~info->mask) ^ info->mark; | |
33 | return XT_CONTINUE; | |
34 | } | |
35 | ||
c8001f7f JE |
36 | static struct xt_target mark_tg_reg __read_mostly = { |
37 | .name = "MARK", | |
38 | .revision = 2, | |
39 | .family = NFPROTO_UNSPEC, | |
40 | .target = mark_tg, | |
41 | .targetsize = sizeof(struct xt_mark_tginfo2), | |
42 | .me = THIS_MODULE, | |
2e4e6a17 HW |
43 | }; |
44 | ||
d3c5ee6d | 45 | static int __init mark_tg_init(void) |
1da177e4 | 46 | { |
c8001f7f | 47 | return xt_register_target(&mark_tg_reg); |
1da177e4 LT |
48 | } |
49 | ||
d3c5ee6d | 50 | static void __exit mark_tg_exit(void) |
1da177e4 | 51 | { |
c8001f7f | 52 | xt_unregister_target(&mark_tg_reg); |
1da177e4 LT |
53 | } |
54 | ||
d3c5ee6d JE |
55 | module_init(mark_tg_init); |
56 | module_exit(mark_tg_exit); |