/* This is a module which is used for setting the NFMARK field of an skb. *//* (C) 1999-2001 Marc Boucher <marc@mbsi.ca> * * 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_ipv6/ip6_tables.h>#include <linux/netfilter_ipv6/ip6t_MARK.h>MODULE_LICENSE("GPL");MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");static unsigned inttarget(struct sk_buff **pskb,       unsigned int hooknum,       const struct net_device *in,       const struct net_device *out,       const void *targinfo,       void *userinfo){	const struct ip6t_mark_target_info *markinfo = targinfo;	if((*pskb)->nfmark != markinfo->mark) {		(*pskb)->nfmark = markinfo->mark;		(*pskb)->nfcache |= NFC_ALTERED;	}	return IP6T_CONTINUE;}static intcheckentry(const char *tablename,	   const struct ip6t_entry *e,           void *targinfo,           unsigned int targinfosize,           unsigned int hook_mask){	if (targinfosize != IP6T_ALIGN(sizeof(struct ip6t_mark_target_info))) {		printk(KERN_WARNING "MARK: targinfosize %u != %Zu\n",		       targinfosize,		       IP6T_ALIGN(sizeof(struct ip6t_mark_target_info)));		return 0;	}	if (strcmp(tablename, "mangle") != 0) {		printk(KERN_WARNING "MARK: can only be called from \"mangle\" table, not \"%s\"\n", tablename);		return 0;	}	return 1;}static struct ip6t_target ip6t_mark_reg= { { NULL, NULL }, "MARK", target, checkentry, NULL, THIS_MODULE };static int __init init(void){	printk(KERN_DEBUG "registering ipv6 mark target\n");	if (ip6t_register_target(&ip6t_mark_reg))		return -EINVAL;	return 0;}static void __exit fini(void){	ip6t_unregister_target(&ip6t_mark_reg);}module_init(init);module_exit(fini);