2 * xt_mark - Netfilter module to match NFMARK value
4 * (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
5 * Copyright © CC Computer Consultants GmbH, 2007 - 2008
6 * Jan Engelhardt <jengelh@computergmbh.de>
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");
20 MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
21 MODULE_DESCRIPTION("Xtables: packet mark match");
22 MODULE_ALIAS("ipt_mark");
23 MODULE_ALIAS("ip6t_mark");
26 mark_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
28 const struct xt_mark_info *info = par->matchinfo;
30 return ((skb->mark & info->mask) == info->mark) ^ info->invert;
34 mark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
36 const struct xt_mark_mtinfo1 *info = par->matchinfo;
38 return ((skb->mark & info->mask) == info->mark) ^ info->invert;
42 mark_mt_check_v0(const char *tablename, const void *entry,
43 const struct xt_match *match, void *matchinfo,
44 unsigned int hook_mask)
46 const struct xt_mark_info *minfo = matchinfo;
48 if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) {
49 printk(KERN_WARNING "mark: only supports 32bit mark\n");
56 struct compat_xt_mark_info {
57 compat_ulong_t mark, mask;
63 static void mark_mt_compat_from_user_v0(void *dst, void *src)
65 const struct compat_xt_mark_info *cm = src;
66 struct xt_mark_info m = {
71 memcpy(dst, &m, sizeof(m));
74 static int mark_mt_compat_to_user_v0(void __user *dst, void *src)
76 const struct xt_mark_info *m = src;
77 struct compat_xt_mark_info cm = {
82 return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
84 #endif /* CONFIG_COMPAT */
86 static struct xt_match mark_mt_reg[] __read_mostly = {
90 .family = NFPROTO_UNSPEC,
91 .checkentry = mark_mt_check_v0,
93 .matchsize = sizeof(struct xt_mark_info),
95 .compatsize = sizeof(struct compat_xt_mark_info),
96 .compat_from_user = mark_mt_compat_from_user_v0,
97 .compat_to_user = mark_mt_compat_to_user_v0,
104 .family = NFPROTO_UNSPEC,
106 .matchsize = sizeof(struct xt_mark_mtinfo1),
111 static int __init mark_mt_init(void)
113 return xt_register_matches(mark_mt_reg, ARRAY_SIZE(mark_mt_reg));
116 static void __exit mark_mt_exit(void)
118 xt_unregister_matches(mark_mt_reg, ARRAY_SIZE(mark_mt_reg));
121 module_init(mark_mt_init);
122 module_exit(mark_mt_exit);