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 hook_mask
)
79 struct xt_mark_target_info
*markinfo
= targinfo
;
81 if (markinfo
->mark
> 0xffffffff) {
82 printk(KERN_WARNING
"MARK: Only supports 32bit wide mark\n");
89 checkentry_v1(const char *tablename
,
91 const struct xt_target
*target
,
93 unsigned int hook_mask
)
95 struct xt_mark_target_info_v1
*markinfo
= targinfo
;
97 if (markinfo
->mode
!= XT_MARK_SET
98 && markinfo
->mode
!= XT_MARK_AND
99 && markinfo
->mode
!= XT_MARK_OR
) {
100 printk(KERN_WARNING
"MARK: unknown mode %u\n",
104 if (markinfo
->mark
> 0xffffffff) {
105 printk(KERN_WARNING
"MARK: Only supports 32bit wide mark\n");
111 static struct xt_target xt_mark_target
[] = {
116 .checkentry
= checkentry_v0
,
118 .targetsize
= sizeof(struct xt_mark_target_info
),
126 .checkentry
= checkentry_v1
,
128 .targetsize
= sizeof(struct xt_mark_target_info_v1
),
136 .checkentry
= checkentry_v0
,
138 .targetsize
= sizeof(struct xt_mark_target_info
),
144 static int __init
xt_mark_init(void)
146 return xt_register_targets(xt_mark_target
, ARRAY_SIZE(xt_mark_target
));
149 static void __exit
xt_mark_fini(void)
151 xt_unregister_targets(xt_mark_target
, ARRAY_SIZE(xt_mark_target
));
154 module_init(xt_mark_init
);
155 module_exit(xt_mark_fini
);
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