1 /* Kernel module to match NFMARK values. */
3 /* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/skbuff.h>
13 #include <linux/netfilter/xt_mark.h>
14 #include <linux/netfilter/x_tables.h>
16 MODULE_LICENSE("GPL");
17 MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
18 MODULE_DESCRIPTION("iptables mark matching module");
19 MODULE_ALIAS("ipt_mark");
20 MODULE_ALIAS("ip6t_mark");
23 match(const struct sk_buff *skb,
24 const struct net_device *in,
25 const struct net_device *out,
26 const struct xt_match *match,
27 const void *matchinfo,
32 const struct xt_mark_info *info = matchinfo;
34 return ((skb->nfmark & info->mask) == info->mark) ^ info->invert;
38 checkentry(const char *tablename,
40 const struct xt_match *match,
42 unsigned int hook_mask)
44 const struct xt_mark_info *minfo = matchinfo;
46 if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) {
47 printk(KERN_WARNING "mark: only supports 32bit mark\n");
53 static struct xt_match xt_mark_match[] = {
57 .checkentry = checkentry,
59 .matchsize = sizeof(struct xt_mark_info),
65 .checkentry = checkentry,
67 .matchsize = sizeof(struct xt_mark_info),
72 static int __init xt_mark_init(void)
74 return xt_register_matches(xt_mark_match, ARRAY_SIZE(xt_mark_match));
77 static void __exit xt_mark_fini(void)
79 xt_unregister_matches(xt_mark_match, ARRAY_SIZE(xt_mark_match));
82 module_init(xt_mark_init);
83 module_exit(xt_mark_fini);