1 /* This is a module which is used for setting the NFMARK field of an skb. */
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 <net/checksum.h>
15 #include <linux/netfilter/x_tables.h>
16 #include <linux/netfilter/xt_MARK.h>
18 MODULE_LICENSE("GPL");
19 MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
20 MODULE_DESCRIPTION("ip[6]tables MARK modification module");
21 MODULE_ALIAS("ipt_MARK");
22 MODULE_ALIAS("ip6t_MARK");
25 target_v0(struct sk_buff **pskb,
26 const struct net_device *in,
27 const struct net_device *out,
29 const struct xt_target *target,
32 const struct xt_mark_target_info *markinfo = targinfo;
34 if((*pskb)->nfmark != markinfo->mark)
35 (*pskb)->nfmark = markinfo->mark;
41 target_v1(struct sk_buff **pskb,
42 const struct net_device *in,
43 const struct net_device *out,
45 const struct xt_target *target,
48 const struct xt_mark_target_info_v1 *markinfo = targinfo;
51 switch (markinfo->mode) {
53 mark = markinfo->mark;
57 mark = (*pskb)->nfmark & markinfo->mark;
61 mark = (*pskb)->nfmark | markinfo->mark;
65 if((*pskb)->nfmark != mark)
66 (*pskb)->nfmark = mark;
73 checkentry_v0(const char *tablename,
75 const struct xt_target *target,
77 unsigned int targinfosize,
78 unsigned int hook_mask)
80 struct xt_mark_target_info *markinfo = targinfo;
82 if (markinfo->mark > 0xffffffff) {
83 printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
90 checkentry_v1(const char *tablename,
92 const struct xt_target *target,
94 unsigned int targinfosize,
95 unsigned int hook_mask)
97 struct xt_mark_target_info_v1 *markinfo = targinfo;
99 if (markinfo->mode != XT_MARK_SET
100 && markinfo->mode != XT_MARK_AND
101 && markinfo->mode != XT_MARK_OR) {
102 printk(KERN_WARNING "MARK: unknown mode %u\n",
106 if (markinfo->mark > 0xffffffff) {
107 printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
113 static struct xt_target xt_mark_target[] = {
118 .checkentry = checkentry_v0,
120 .targetsize = sizeof(struct xt_mark_target_info),
128 .checkentry = checkentry_v1,
130 .targetsize = sizeof(struct xt_mark_target_info_v1),
138 .checkentry = checkentry_v0,
140 .targetsize = sizeof(struct xt_mark_target_info),
146 static int __init xt_mark_init(void)
148 return xt_register_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target));
151 static void __exit xt_mark_fini(void)
153 xt_unregister_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target));
156 module_init(xt_mark_init);
157 module_exit(xt_mark_fini);