93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
|
|
* 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_ipv4/ip_tables.h>
|
|
#include <linux/netfilter_ipv4/ipt_CLASSIFY.h>
|
|
|
|
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("iptables qdisc classification target module");
|
|
|
|
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 ipt_classify_target_info *clinfo = targinfo;
|
|
|
|
if((*pskb)->priority != clinfo->priority) {
|
|
(*pskb)->priority = clinfo->priority;
|
|
(*pskb)->nfcache |= NFC_ALTERED;
|
|
}
|
|
|
|
return IPT_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
checkentry(const char *tablename,
|
|
const struct ipt_entry *e,
|
|
void *targinfo,
|
|
unsigned int targinfosize,
|
|
unsigned int hook_mask)
|
|
{
|
|
if (targinfosize != IPT_ALIGN(sizeof(struct ipt_classify_target_info))){
|
|
printk(KERN_ERR "CLASSIFY: invalid size (%u != %Zu).\n",
|
|
targinfosize,
|
|
IPT_ALIGN(sizeof(struct ipt_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 ipt_target ipt_classify_reg = {
|
|
.name = "CLASSIFY",
|
|
.target = target,
|
|
.checkentry = checkentry,
|
|
.me = THIS_MODULE,
|
|
};
|
|
|
|
static int __init init(void)
|
|
{
|
|
return ipt_register_target(&ipt_classify_reg);
|
|
}
|
|
|
|
static void __exit fini(void)
|
|
{
|
|
ipt_unregister_target(&ipt_classify_reg);
|
|
}
|
|
|
|
module_init(init);
|
|
module_exit(fini);
|