/* *	xt_mark - Netfilter module to match NFMARK value * *	(C) 1999-2001 Marc Boucher <marc@mbsi.ca> *	Copyright © CC Computer Consultants GmbH, 2007 - 2008 *	Jan Engelhardt <jengelh@medozas.de> * *	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/netfilter/xt_mark.h>#include <linux/netfilter/x_tables.h> MODULE_LICENSE("GPL");MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");MODULE_DESCRIPTION("Xtables: packet mark operations");MODULE_ALIAS("ipt_mark");MODULE_ALIAS("ip6t_mark");MODULE_ALIAS("ipt_MARK");MODULE_ALIAS("ip6t_MARK"); static unsigned intmark_tg(struct sk_buff *skb, const struct xt_action_param *par){	const struct xt_mark_tginfo2 *info = par->targinfo; 	skb->mark = (skb->mark & ~info->mask) ^ info->mark;	return XT_CONTINUE;} static boolmark_mt(const struct sk_buff *skb, struct xt_action_param *par){	const struct xt_mark_mtinfo1 *info = par->matchinfo; 	return ((skb->mark & info->mask) == info->mark) ^ info->invert;} static struct xt_target mark_tg_reg __read_mostly = {	.name           = "MARK",	.revision       = 2,	.family         = NFPROTO_UNSPEC,	.target         = mark_tg,	.targetsize     = sizeof(struct xt_mark_tginfo2),	.me             = THIS_MODULE,}; static struct xt_match mark_mt_reg __read_mostly = {	.name           = "mark",	.revision       = 1,	.family         = NFPROTO_UNSPEC,	.match          = mark_mt,	.matchsize      = sizeof(struct xt_mark_mtinfo1),	.me             = THIS_MODULE,}; static int __init mark_mt_init(void){	int ret; 	ret = xt_register_target(&mark_tg_reg);	if (ret < 0)		return ret;	ret = xt_register_match(&mark_mt_reg);	if (ret < 0) {		xt_unregister_target(&mark_tg_reg);		return ret;	}	return 0;} static void __exit mark_mt_exit(void){	xt_unregister_match(&mark_mt_reg);	xt_unregister_target(&mark_tg_reg);} module_init(mark_mt_init);module_exit(mark_mt_exit);