1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 *	xt_mark - Netfilter module to match NFMARK value
 4 *
 5 *	(C) 1999-2001 Marc Boucher <marc@mbsi.ca>
 6 *	Copyright © CC Computer Consultants GmbH, 2007 - 2008
 7 *	Jan Engelhardt <jengelh@medozas.de>
 
 
 
 
 8 */
 9
10#include <linux/module.h>
11#include <linux/skbuff.h>
12
13#include <linux/netfilter/xt_mark.h>
14#include <linux/netfilter/x_tables.h>
15
16MODULE_LICENSE("GPL");
17MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
18MODULE_DESCRIPTION("Xtables: packet mark operations");
19MODULE_ALIAS("ipt_mark");
20MODULE_ALIAS("ip6t_mark");
21MODULE_ALIAS("ipt_MARK");
22MODULE_ALIAS("ip6t_MARK");
23MODULE_ALIAS("arpt_MARK");
24
25static unsigned int
26mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
27{
28	const struct xt_mark_tginfo2 *info = par->targinfo;
29
30	skb->mark = (skb->mark & ~info->mask) ^ info->mark;
31	return XT_CONTINUE;
32}
33
34static bool
35mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
36{
37	const struct xt_mark_mtinfo1 *info = par->matchinfo;
38
39	return ((skb->mark & info->mask) == info->mark) ^ info->invert;
40}
41
42static struct xt_target mark_tg_reg __read_mostly = {
43	.name           = "MARK",
44	.revision       = 2,
45	.family         = NFPROTO_UNSPEC,
46	.target         = mark_tg,
47	.targetsize     = sizeof(struct xt_mark_tginfo2),
48	.me             = THIS_MODULE,
49};
50
51static struct xt_match mark_mt_reg __read_mostly = {
52	.name           = "mark",
53	.revision       = 1,
54	.family         = NFPROTO_UNSPEC,
55	.match          = mark_mt,
56	.matchsize      = sizeof(struct xt_mark_mtinfo1),
57	.me             = THIS_MODULE,
58};
59
60static int __init mark_mt_init(void)
61{
62	int ret;
63
64	ret = xt_register_target(&mark_tg_reg);
65	if (ret < 0)
66		return ret;
67	ret = xt_register_match(&mark_mt_reg);
68	if (ret < 0) {
69		xt_unregister_target(&mark_tg_reg);
70		return ret;
71	}
72	return 0;
73}
74
75static void __exit mark_mt_exit(void)
76{
77	xt_unregister_match(&mark_mt_reg);
78	xt_unregister_target(&mark_tg_reg);
79}
80
81module_init(mark_mt_init);
82module_exit(mark_mt_exit);

 
 1/*
 2 *	xt_mark - Netfilter module to match NFMARK value
 3 *
 4 *	(C) 1999-2001 Marc Boucher <marc@mbsi.ca>
 5 *	Copyright © CC Computer Consultants GmbH, 2007 - 2008
 6 *	Jan Engelhardt <jengelh@medozas.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
16#include <linux/netfilter/xt_mark.h>
17#include <linux/netfilter/x_tables.h>
18
19MODULE_LICENSE("GPL");
20MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
21MODULE_DESCRIPTION("Xtables: packet mark operations");
22MODULE_ALIAS("ipt_mark");
23MODULE_ALIAS("ip6t_mark");
24MODULE_ALIAS("ipt_MARK");
25MODULE_ALIAS("ip6t_MARK");
26MODULE_ALIAS("arpt_MARK");
27
28static unsigned int
29mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
30{
31	const struct xt_mark_tginfo2 *info = par->targinfo;
32
33	skb->mark = (skb->mark & ~info->mask) ^ info->mark;
34	return XT_CONTINUE;
35}
36
37static bool
38mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
39{
40	const struct xt_mark_mtinfo1 *info = par->matchinfo;
41
42	return ((skb->mark & info->mask) == info->mark) ^ info->invert;
43}
44
45static struct xt_target mark_tg_reg __read_mostly = {
46	.name           = "MARK",
47	.revision       = 2,
48	.family         = NFPROTO_UNSPEC,
49	.target         = mark_tg,
50	.targetsize     = sizeof(struct xt_mark_tginfo2),
51	.me             = THIS_MODULE,
52};
53
54static struct xt_match mark_mt_reg __read_mostly = {
55	.name           = "mark",
56	.revision       = 1,
57	.family         = NFPROTO_UNSPEC,
58	.match          = mark_mt,
59	.matchsize      = sizeof(struct xt_mark_mtinfo1),
60	.me             = THIS_MODULE,
61};
62
63static int __init mark_mt_init(void)
64{
65	int ret;
66
67	ret = xt_register_target(&mark_tg_reg);
68	if (ret < 0)
69		return ret;
70	ret = xt_register_match(&mark_mt_reg);
71	if (ret < 0) {
72		xt_unregister_target(&mark_tg_reg);
73		return ret;
74	}
75	return 0;
76}
77
78static void __exit mark_mt_exit(void)
79{
80	xt_unregister_match(&mark_mt_reg);
81	xt_unregister_target(&mark_tg_reg);
82}
83
84module_init(mark_mt_init);
85module_exit(mark_mt_exit);