1/*
2 *  ebt_mark_m
3 *
4 *	Authors:
5 *	Bart De Schuymer <bdschuym@pandora.be>
6 *
7 *  July, 2002
8 *
9 */
10
11#include <linux/netfilter_bridge/ebtables.h>
12#include <linux/netfilter_bridge/ebt_mark_m.h>
13#include <linux/module.h>
14
15static int ebt_filter_mark(const struct sk_buff *skb,
16   const struct net_device *in, const struct net_device *out, const void *data,
17   unsigned int datalen)
18{
19	struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
20
21	if (info->bitmask & EBT_MARK_OR)
22		return !(!!(skb->mark & info->mask) ^ info->invert);
23	return !(((skb->mark & info->mask) == info->mark) ^ info->invert);
24}
25
26static int ebt_mark_check(const char *tablename, unsigned int hookmask,
27   const struct ebt_entry *e, void *data, unsigned int datalen)
28{
29	struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
30
31	if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_m_info)))
32		return -EINVAL;
33	if (info->bitmask & ~EBT_MARK_MASK)
34		return -EINVAL;
35	if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
36		return -EINVAL;
37	if (!info->bitmask)
38		return -EINVAL;
39	return 0;
40}
41
42static struct ebt_match filter_mark =
43{
44	.name		= EBT_MARK_MATCH,
45	.match		= ebt_filter_mark,
46	.check		= ebt_mark_check,
47	.me		= THIS_MODULE,
48};
49
50static int __init ebt_mark_m_init(void)
51{
52	return ebt_register_match(&filter_mark);
53}
54
55static void __exit ebt_mark_m_fini(void)
56{
57	ebt_unregister_match(&filter_mark);
58}
59
60module_init(ebt_mark_m_init);
61module_exit(ebt_mark_m_fini);
62MODULE_LICENSE("GPL");
63