tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
7 *
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.
11 */
12
13#include <linux/module.h>
14#include <linux/skbuff.h>
15#include <linux/ip.h>
16#include <net/checksum.h>
17
18#include <linux/netfilter/x_tables.h>
19#include <linux/netfilter/xt_MARK.h>
20
21MODULE_LICENSE("GPL");
22MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
23MODULE_DESCRIPTION("Xtables: packet mark modification");
24MODULE_ALIAS("ipt_MARK");
25MODULE_ALIAS("ip6t_MARK");
26
27static unsigned int
28mark_tg(struct sk_buff *skb, const struct xt_target_param *par)
29{
30 const struct xt_mark_tginfo2 *info = par->targinfo;
31
32 skb->mark = (skb->mark & ~info->mask) ^ info->mark;
33 return XT_CONTINUE;
34}
35
36static 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,
43};
44
45static int __init mark_tg_init(void)
46{
47 return xt_register_target(&mark_tg_reg);
48}
49
50static void __exit mark_tg_exit(void)
51{
52 xt_unregister_target(&mark_tg_reg);
53}
54
55module_init(mark_tg_init);
56module_exit(mark_tg_exit);