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[NETFILTER]: xt_mark match, revision 1

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

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2008-01-14 23:41:11 -08:00 committed by David S. Miller
parent 64eb12f997
commit 17b0d7ef65
2 changed files with 59 additions and 22 deletions
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5
include/linux/netfilter/xt_mark.h
View File

@ -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*/

76
net/netfilter/xt_mark.c
View File

@ -1,10 +1,13 @@
/* Kernel module to match NFMARK values. */
/* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
/*
* xt_mark - Netfilter module to match NFMARK value
*
* 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.
* (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
* published by the Free Software Foundation.
*/
#include <linux/module.h>
@ -20,9 +23,10 @@ MODULE_ALIAS("ipt_mark");
MODULE_ALIAS("ip6t_mark");
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)
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;
@ -30,9 +34,19 @@ mark_mt(const struct sk_buff *skb, const struct net_device *in,
}
static bool
mark_mt_check(const char *tablename, const void *entry,
const struct xt_match *match, void *matchinfo,
unsigned int hook_mask)
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_mtinfo1 *info = matchinfo;
return ((skb->mark & info->mask) == info->mark) ^ info->invert;
}
static bool
mark_mt_check_v0(const char *tablename, const void *entry,
const struct xt_match *match, void *matchinfo,
unsigned int hook_mask)
{
const struct xt_mark_info *minfo = matchinfo;
@ -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)