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[NETFILTER]: xt_MARK target, revision 2 

Introduces the xt_MARK target revision 2. It uses fixed types, and
also uses the more expressive XOR logic.

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 23:38:52 -08:00 committed by David S. Miller
parent 0dc8c76029
commit e0a812aea5
2 changed files with 56 additions and 22 deletions
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4
include/linux/netfilter/xt_MARK.h
View File

@ -18,4 +18,8 @@ struct xt_mark_target_info_v1 {
u_int8_t mode;
};
struct xt_mark_tginfo2 {
u_int32_t mark, mask;
};
#endif /*_XT_MARK_H_target */

74
net/netfilter/xt_MARK.c
View File

@ -1,10 +1,13 @@
/* This is a module which is used for setting the NFMARK field of an skb. */
/* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
/*
* xt_MARK - Netfilter module to modify the NFMARK field of an skb
*
* 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>
@ -33,9 +36,9 @@ mark_tg_v0(struct sk_buff *skb, const struct net_device *in,
}
static unsigned int
mark_tg(struct sk_buff *skb, const struct net_device *in,
const struct net_device *out, unsigned int hooknum,
const struct xt_target *target, const void *targinfo)
mark_tg_v1(struct sk_buff *skb, const struct net_device *in,
const struct net_device *out, unsigned int hooknum,
const struct xt_target *target, const void *targinfo)
{
const struct xt_mark_target_info_v1 *markinfo = targinfo;
int mark = 0;
@ -58,6 +61,17 @@ mark_tg(struct sk_buff *skb, const struct net_device *in,
return XT_CONTINUE;
}
static unsigned int
mark_tg(struct sk_buff *skb, const struct net_device *in,
const struct net_device *out, unsigned int hooknum,
const struct xt_target *target, const void *targinfo)
{
const struct xt_mark_tginfo2 *info = targinfo;
skb->mark = (skb->mark & ~info->mask) ^ info->mark;
return XT_CONTINUE;
}
static bool
mark_tg_check_v0(const char *tablename, const void *entry,
const struct xt_target *target, void *targinfo,
@ -73,9 +87,9 @@ mark_tg_check_v0(const char *tablename, const void *entry,
}
static bool
mark_tg_check(const char *tablename, const void *entry,
const struct xt_target *target, void *targinfo,
unsigned int hook_mask)
mark_tg_check_v1(const char *tablename, const void *entry,
const struct xt_target *target, void *targinfo,
unsigned int hook_mask)
{
const struct xt_mark_target_info_v1 *markinfo = targinfo;
@ -98,7 +112,7 @@ struct compat_xt_mark_target_info {
compat_ulong_t mark;
};
static void mark_tg_compat_from_user(void *dst, void *src)
static void mark_tg_compat_from_user_v0(void *dst, void *src)
{
const struct compat_xt_mark_target_info *cm = src;
struct xt_mark_target_info m = {
@ -107,7 +121,7 @@ static void mark_tg_compat_from_user(void *dst, void *src)
memcpy(dst, &m, sizeof(m));
}
static int mark_tg_compat_to_user(void __user *dst, void *src)
static int mark_tg_compat_to_user_v0(void __user *dst, void *src)
{
const struct xt_mark_target_info *m = src;
struct compat_xt_mark_target_info cm = {
@ -154,8 +168,8 @@ static struct xt_target mark_tg_reg[] __read_mostly = {
.targetsize = sizeof(struct xt_mark_target_info),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_mark_target_info),
.compat_from_user = mark_tg_compat_from_user,
.compat_to_user = mark_tg_compat_to_user,
.compat_from_user = mark_tg_compat_from_user_v0,
.compat_to_user = mark_tg_compat_to_user_v0,
#endif
.table = "mangle",
.me = THIS_MODULE,
@ -164,8 +178,8 @@ static struct xt_target mark_tg_reg[] __read_mostly = {
.name = "MARK",
.family = AF_INET,
.revision = 1,
.checkentry = mark_tg_check,
.target = mark_tg,
.checkentry = mark_tg_check_v1,
.target = mark_tg_v1,
.targetsize = sizeof(struct xt_mark_target_info_v1),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_mark_target_info_v1),
@ -184,8 +198,8 @@ static struct xt_target mark_tg_reg[] __read_mostly = {
.targetsize = sizeof(struct xt_mark_target_info),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_mark_target_info),
.compat_from_user = mark_tg_compat_from_user,
.compat_to_user = mark_tg_compat_to_user,
.compat_from_user = mark_tg_compat_from_user_v0,
.compat_to_user = mark_tg_compat_to_user_v0,
#endif
.table = "mangle",
.me = THIS_MODULE,
@ -194,8 +208,8 @@ static struct xt_target mark_tg_reg[] __read_mostly = {
.name = "MARK",
.family = AF_INET6,
.revision = 1,
.checkentry = mark_tg_check,
.target = mark_tg,
.checkentry = mark_tg_check_v1,
.target = mark_tg_v1,
.targetsize = sizeof(struct xt_mark_target_info_v1),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_mark_target_info_v1),
@ -205,6 +219,22 @@ static struct xt_target mark_tg_reg[] __read_mostly = {
.table = "mangle",
.me = THIS_MODULE,
},
{
.name = "MARK",
.revision = 2,
.family = AF_INET,
.target = mark_tg,
.targetsize = sizeof(struct xt_mark_tginfo2),
.me = THIS_MODULE,
},
{
.name = "MARK",
.revision = 2,
.family = AF_INET6,
.target = mark_tg,
.targetsize = sizeof(struct xt_mark_tginfo2),
.me = THIS_MODULE,
},
};
static int __init mark_tg_init(void)