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Commit 17b0d7ef authored by Jan Engelhardt's avatar Jan Engelhardt Committed by David S. Miller
Browse files

[NETFILTER]: xt_mark match, revision 1 



Introduces the xt_mark match revision 1. It uses fixed types,
eventually obsoleting revision 0 some day (uses nonfixed types).

Signed-off-by: default avatarJan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 64eb12f9

include/linux/netfilter/xt_mark.h

+5 −0
Original line number Diff line number Diff line
@@ -6,4 +6,9 @@ struct xt_mark_info { 
    u_int8_t invert;

};



struct xt_mark_mtinfo1 {

	u_int32_t mark, mask;

	u_int8_t invert;

};



#endif /*_XT_MARK_H*/

net/netfilter/xt_mark.c

+52 −20
Original line number Diff line number Diff line 
/* Kernel module to match NFMARK values. */



/* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>

/*

 *	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@computergmbh.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
@@ -19,18 +22,29 @@ MODULE_DESCRIPTION("iptables mark matching module"); 
MODULE_ALIAS("ipt_mark");

MODULE_ALIAS("ip6t_mark");



static bool

mark_mt_v0(const struct sk_buff *skb, const struct net_device *in,

           const struct net_device *out, const struct xt_match *match,

           const void *matchinfo, int offset, unsigned int protoff,

           bool *hotdrop)

{

	const struct xt_mark_info *info = matchinfo;



	return ((skb->mark & info->mask) == info->mark) ^ info->invert;

}



static bool

mark_mt(const struct sk_buff *skb, const struct net_device *in,

        const struct net_device *out, const struct xt_match *match,

        const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)

{

	const struct xt_mark_info *info = matchinfo;

	const struct xt_mark_mtinfo1 *info = matchinfo;



	return ((skb->mark & info->mask) == info->mark) ^ info->invert;

}



static bool

mark_mt_check(const char *tablename, const void *entry,

mark_mt_check_v0(const char *tablename, const void *entry,

                 const struct xt_match *match, void *matchinfo,

                 unsigned int hook_mask)

{
@@ -51,7 +65,7 @@ struct compat_xt_mark_info { 
	u_int16_t	__pad2;

};



static void mark_mt_compat_from_user(void *dst, void *src)

static void mark_mt_compat_from_user_v0(void *dst, void *src)

{

	const struct compat_xt_mark_info *cm = src;

	struct xt_mark_info m = {
@@ -62,7 +76,7 @@ static void mark_mt_compat_from_user(void *dst, void *src) 
	memcpy(dst, &m, sizeof(m));

}



static int mark_mt_compat_to_user(void __user *dst, void *src)

static int mark_mt_compat_to_user_v0(void __user *dst, void *src)

{

	const struct xt_mark_info *m = src;

	struct compat_xt_mark_info cm = {
@@ -77,30 +91,48 @@ static int mark_mt_compat_to_user(void __user *dst, void *src) 
static struct xt_match mark_mt_reg[] __read_mostly = {

	{

		.name		= "mark",

		.revision	= 0,

		.family		= AF_INET,

		.checkentry	= mark_mt_check,

		.match		= mark_mt,

		.checkentry	= mark_mt_check_v0,

		.match		= mark_mt_v0,

		.matchsize	= sizeof(struct xt_mark_info),

#ifdef CONFIG_COMPAT

		.compatsize	= sizeof(struct compat_xt_mark_info),

		.compat_from_user = mark_mt_compat_from_user,

		.compat_to_user	= mark_mt_compat_to_user,

		.compat_from_user = mark_mt_compat_from_user_v0,

		.compat_to_user	= mark_mt_compat_to_user_v0,

#endif

		.me		= THIS_MODULE,

	},

	{

		.name		= "mark",

		.revision	= 0,

		.family		= AF_INET6,

		.checkentry	= mark_mt_check,

		.match		= mark_mt,

		.checkentry	= mark_mt_check_v0,

		.match		= mark_mt_v0,

		.matchsize	= sizeof(struct xt_mark_info),

#ifdef CONFIG_COMPAT

		.compatsize	= sizeof(struct compat_xt_mark_info),

		.compat_from_user = mark_mt_compat_from_user,

		.compat_to_user	= mark_mt_compat_to_user,

		.compat_from_user = mark_mt_compat_from_user_v0,

		.compat_to_user	= mark_mt_compat_to_user_v0,

#endif

		.me		= THIS_MODULE,

	},

	{

		.name           = "mark",

		.revision       = 1,

		.family         = AF_INET,

		.match          = mark_mt,

		.matchsize      = sizeof(struct xt_mark_mtinfo1),

		.me             = THIS_MODULE,

	},

	{

		.name           = "mark",

		.revision       = 1,

		.family         = AF_INET6,

		.match          = mark_mt,

		.matchsize      = sizeof(struct xt_mark_mtinfo1),

		.me             = THIS_MODULE,

	},

};



static int __init mark_mt_init(void)