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/*
* This is a module which is used for setting the skb->priority field
* of an skb for qdisc classification.
*/
/* (C) 2001-2002 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <net/checksum.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_CLASSIFY.h>
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("iptables qdisc classification target module");
MODULE_ALIAS("ipt_CLASSIFY");
static unsigned int
target(struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
const void *targinfo,
void *userinfo)
{
const struct xt_classify_target_info *clinfo = targinfo;
if ((*pskb)->priority != clinfo->priority)
(*pskb)->priority = clinfo->priority;
return XT_CONTINUE;
}
static int
checkentry(const char *tablename,
const void *e,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
{
if (targinfosize != XT_ALIGN(sizeof(struct xt_classify_target_info))){
printk(KERN_ERR "CLASSIFY: invalid size (%u != %Zu).\n",
targinfosize,
XT_ALIGN(sizeof(struct xt_classify_target_info)));
return 0;
}
if (hook_mask & ~((1 << NF_IP_LOCAL_OUT) | (1 << NF_IP_FORWARD) |
(1 << NF_IP_POST_ROUTING))) {
printk(KERN_ERR "CLASSIFY: only valid in LOCAL_OUT, FORWARD "
"and POST_ROUTING.\n");
return 0;
}
if (strcmp(tablename, "mangle") != 0) {
printk(KERN_ERR "CLASSIFY: can only be called from "
"\"mangle\" table, not \"%s\".\n",
tablename);
return 0;
}
return 1;
}
static struct xt_target classify_reg = {
.name = "CLASSIFY",
.target = target,
.checkentry = checkentry,
.me = THIS_MODULE,
};
static struct xt_target classify6_reg = {
.name = "CLASSIFY",
.target = target,
.checkentry = checkentry,
.me = THIS_MODULE,
};
static int __init init(void)
{
int ret;
ret = xt_register_target(AF_INET, &classify_reg);
if (ret)
return ret;
ret = xt_register_target(AF_INET6, &classify6_reg);
if (ret)
xt_unregister_target(AF_INET, &classify_reg);
return ret;
}
static void __exit fini(void)
{
xt_unregister_target(AF_INET, &classify_reg);
xt_unregister_target(AF_INET6, &classify6_reg);
}
module_init(init);
module_exit(fini);
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