2 * xt_mark - Netfilter module to match NFMARK value
5 * Copyright © CC Computer Consultants GmbH, 2007 - 2008
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.
13 #include <linux/module.h>
14 #include <linux/skbuff.h>
16 #include <linux/netfilter/xt_mark.h>
17 #include <linux/netfilter/x_tables.h>
19 MODULE_LICENSE("GPL");
21 MODULE_DESCRIPTION("Xtables: packet mark operations");
22 MODULE_ALIAS("ipt_mark");
23 MODULE_ALIAS("ip6t_mark");
24 MODULE_ALIAS("ipt_MARK");
25 MODULE_ALIAS("ip6t_MARK");
26 MODULE_ALIAS("arpt_MARK");
29 mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
31 const struct xt_mark_tginfo2 *info = par->targinfo;
33 skb->mark = (skb->mark & ~info->mask) ^ info->mark;
38 mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
40 const struct xt_mark_mtinfo1 *info = par->matchinfo;
42 return ((skb->mark & info->mask) == info->mark) ^ info->invert;
45 static struct xt_target mark_tg_reg __read_mostly = {
48 .family = NFPROTO_UNSPEC,
50 .targetsize = sizeof(struct xt_mark_tginfo2),
54 static struct xt_match mark_mt_reg __read_mostly = {
57 .family = NFPROTO_UNSPEC,
59 .matchsize = sizeof(struct xt_mark_mtinfo1),
63 static int __init mark_mt_init(void)
67 ret = xt_register_target(&mark_tg_reg);
70 ret = xt_register_match(&mark_mt_reg);
72 xt_unregister_target(&mark_tg_reg);
78 static void __exit mark_mt_exit(void)
80 xt_unregister_match(&mark_mt_reg);
81 xt_unregister_target(&mark_tg_reg);
84 module_init(mark_mt_init);
85 module_exit(mark_mt_exit);