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/*
* ebt_mark
*
* Authors:
* Bart De Schuymer <bart.de.schuymer@pandora.be>
*
* July, 2002
*
*/
// The mark target can be used in any chain
// I believe adding a mangle table just for marking is total overkill
// Marking a frame doesn't really change anything in the frame anyway
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_mark_t.h>
#include <linux/module.h>
static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
const struct net_device *in, const struct net_device *out,
const void *data, unsigned int datalen)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
if ((*pskb)->nfmark != info->mark) {
(*pskb)->nfmark = info->mark;
(*pskb)->nfcache |= NFC_ALTERED;
}
return info->target;
}
static int ebt_target_mark_check(const char *tablename, unsigned int hookmask,
const struct ebt_entry *e, void *data, unsigned int datalen)
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
if (datalen != sizeof(struct ebt_mark_t_info))
return -EINVAL;
if (BASE_CHAIN && info->target == EBT_RETURN)
return -EINVAL;
CLEAR_BASE_CHAIN_BIT;
if (INVALID_TARGET)
return -EINVAL;
return 0;
}
static struct ebt_target mark_target =
{
{NULL, NULL}, EBT_MARK_TARGET, ebt_target_mark,
ebt_target_mark_check, NULL, THIS_MODULE
};
static int __init init(void)
{
return ebt_register_target(&mark_target);
}
static void __exit fini(void)
{
ebt_unregister_target(&mark_target);
}
module_init(init);
module_exit(fini);
EXPORT_NO_SYMBOLS;
MODULE_LICENSE("GPL");
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