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/*
* Implements a dummy match to allow attaching comments to rules
*
* 2003-05-13 Brad Fisher (brad@info-link.net)
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_comment.h>
MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");
MODULE_DESCRIPTION("iptables comment match module");
MODULE_LICENSE("GPL");
static int
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const void *matchinfo,
int offset,
int *hotdrop)
{
/* We always match */
return 1;
}
static int
checkentry(const char *tablename,
const struct ipt_ip *ip,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
/* Check the size */
if (matchsize != IPT_ALIGN(sizeof(struct ipt_comment_info)))
return 0;
return 1;
}
static struct ipt_match comment_match = {
.name = "comment",
.match = match,
.checkentry = checkentry,
.me = THIS_MODULE
};
static int __init init(void)
{
return ipt_register_match(&comment_match);
}
static void __exit fini(void)
{
ipt_unregister_match(&comment_match);
}
module_init(init);
module_exit(fini);
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