1 /* This kernel module matches connection mark values set by the
4 * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
5 * by Henrik Nordstrom <hno@marasystems.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/module.h>
23 #include <linux/skbuff.h>
25 MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
26 MODULE_DESCRIPTION("IP tables connmark match module");
27 MODULE_LICENSE("GPL");
29 #include <linux/netfilter_ipv4/ip_tables.h>
30 #include <linux/netfilter_ipv4/ipt_connmark.h>
31 #include <linux/netfilter_ipv4/ip_conntrack.h>
34 match(const struct sk_buff
*skb
,
35 const struct net_device
*in
,
36 const struct net_device
*out
,
37 const void *matchinfo
,
41 const struct ipt_connmark_info
*info
= matchinfo
;
42 enum ip_conntrack_info ctinfo
;
43 struct ip_conntrack
*ct
= ip_conntrack_get((struct sk_buff
*)skb
, &ctinfo
);
47 return ((ct
->mark
& info
->mask
) == info
->mark
) ^ info
->invert
;
51 checkentry(const char *tablename
,
52 const struct ipt_ip
*ip
,
54 unsigned int matchsize
,
55 unsigned int hook_mask
)
57 if (matchsize
!= IPT_ALIGN(sizeof(struct ipt_connmark_info
)))
63 static struct ipt_match connmark_match
= {
66 .checkentry
= &checkentry
,
70 static int __init
init(void)
72 return ipt_register_match(&connmark_match
);
75 static void __exit
fini(void)
77 ipt_unregister_match(&connmark_match
);
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