2008-01-15 07:38:52 +00:00
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/*
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* xt_MARK - Netfilter module to modify the NFMARK field of an skb
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*
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* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
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* Copyright © CC Computer Consultants GmbH, 2007 - 2008
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* Jan Engelhardt <jengelh@computergmbh.de>
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2005-04-16 22:20:36 +00:00
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*
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2008-01-15 07:38:52 +00:00
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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2005-04-16 22:20:36 +00:00
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <net/checksum.h>
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|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
#include <linux/netfilter/x_tables.h>
|
|
|
|
#include <linux/netfilter/xt_MARK.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
|
2008-01-15 07:42:28 +00:00
|
|
|
MODULE_DESCRIPTION("Xtables: packet mark modification");
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
MODULE_ALIAS("ipt_MARK");
|
|
|
|
MODULE_ALIAS("ip6t_MARK");
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
static unsigned int
|
2008-10-08 09:35:19 +00:00
|
|
|
mark_tg_v0(struct sk_buff *skb, const struct xt_target_param *par)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-10-08 09:35:19 +00:00
|
|
|
const struct xt_mark_target_info *markinfo = par->targinfo;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-15 07:53:15 +00:00
|
|
|
skb->mark = markinfo->mark;
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
return XT_CONTINUE;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int
|
2008-10-08 09:35:19 +00:00
|
|
|
mark_tg_v1(struct sk_buff *skb, const struct xt_target_param *par)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-10-08 09:35:19 +00:00
|
|
|
const struct xt_mark_target_info_v1 *markinfo = par->targinfo;
|
2005-04-16 22:20:36 +00:00
|
|
|
int mark = 0;
|
|
|
|
|
|
|
|
switch (markinfo->mode) {
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
case XT_MARK_SET:
|
2005-04-16 22:20:36 +00:00
|
|
|
mark = markinfo->mark;
|
|
|
|
break;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
case XT_MARK_AND:
|
2007-10-15 07:53:15 +00:00
|
|
|
mark = skb->mark & markinfo->mark;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
case XT_MARK_OR:
|
2007-10-15 07:53:15 +00:00
|
|
|
mark = skb->mark | markinfo->mark;
|
2005-04-16 22:20:36 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2007-10-15 07:53:15 +00:00
|
|
|
skb->mark = mark;
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
return XT_CONTINUE;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-01-15 07:38:52 +00:00
|
|
|
static unsigned int
|
2008-10-08 09:35:19 +00:00
|
|
|
mark_tg(struct sk_buff *skb, const struct xt_target_param *par)
|
2008-01-15 07:38:52 +00:00
|
|
|
{
|
2008-10-08 09:35:19 +00:00
|
|
|
const struct xt_mark_tginfo2 *info = par->targinfo;
|
2008-01-15 07:38:52 +00:00
|
|
|
|
|
|
|
skb->mark = (skb->mark & ~info->mask) ^ info->mark;
|
|
|
|
return XT_CONTINUE;
|
|
|
|
}
|
|
|
|
|
2008-10-08 09:35:19 +00:00
|
|
|
static bool mark_tg_check_v0(const struct xt_tgchk_param *par)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-10-08 09:35:19 +00:00
|
|
|
const struct xt_mark_target_info *markinfo = par->targinfo;
|
2005-08-10 02:22:01 +00:00
|
|
|
|
|
|
|
if (markinfo->mark > 0xffffffff) {
|
|
|
|
printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
|
2007-07-08 05:16:26 +00:00
|
|
|
return false;
|
2005-08-10 02:22:01 +00:00
|
|
|
}
|
2007-07-08 05:16:26 +00:00
|
|
|
return true;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2008-10-08 09:35:19 +00:00
|
|
|
static bool mark_tg_check_v1(const struct xt_tgchk_param *par)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-10-08 09:35:19 +00:00
|
|
|
const struct xt_mark_target_info_v1 *markinfo = par->targinfo;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
if (markinfo->mode != XT_MARK_SET
|
|
|
|
&& markinfo->mode != XT_MARK_AND
|
|
|
|
&& markinfo->mode != XT_MARK_OR) {
|
2005-04-16 22:20:36 +00:00
|
|
|
printk(KERN_WARNING "MARK: unknown mode %u\n",
|
|
|
|
markinfo->mode);
|
2007-07-08 05:16:26 +00:00
|
|
|
return false;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2005-08-10 02:22:01 +00:00
|
|
|
if (markinfo->mark > 0xffffffff) {
|
|
|
|
printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
|
2007-07-08 05:16:26 +00:00
|
|
|
return false;
|
2005-08-10 02:22:01 +00:00
|
|
|
}
|
2007-07-08 05:16:26 +00:00
|
|
|
return true;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-09-20 19:06:10 +00:00
|
|
|
#ifdef CONFIG_COMPAT
|
2007-12-18 05:51:33 +00:00
|
|
|
struct compat_xt_mark_target_info {
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|
|
|
compat_ulong_t mark;
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|
|
|
};
|
|
|
|
|
2008-01-15 07:38:52 +00:00
|
|
|
static void mark_tg_compat_from_user_v0(void *dst, void *src)
|
2007-12-18 05:51:33 +00:00
|
|
|
{
|
|
|
|
const struct compat_xt_mark_target_info *cm = src;
|
|
|
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struct xt_mark_target_info m = {
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|
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.mark = cm->mark,
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};
|
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|
|
memcpy(dst, &m, sizeof(m));
|
|
|
|
}
|
|
|
|
|
2008-01-15 07:38:52 +00:00
|
|
|
static int mark_tg_compat_to_user_v0(void __user *dst, void *src)
|
2007-12-18 05:51:33 +00:00
|
|
|
{
|
|
|
|
const struct xt_mark_target_info *m = src;
|
|
|
|
struct compat_xt_mark_target_info cm = {
|
|
|
|
.mark = m->mark,
|
|
|
|
};
|
|
|
|
return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
2006-09-20 19:06:10 +00:00
|
|
|
struct compat_xt_mark_target_info_v1 {
|
|
|
|
compat_ulong_t mark;
|
|
|
|
u_int8_t mode;
|
|
|
|
u_int8_t __pad1;
|
|
|
|
u_int16_t __pad2;
|
|
|
|
};
|
|
|
|
|
2007-12-18 05:51:33 +00:00
|
|
|
static void mark_tg_compat_from_user_v1(void *dst, void *src)
|
2006-09-20 19:06:10 +00:00
|
|
|
{
|
2007-07-08 05:16:55 +00:00
|
|
|
const struct compat_xt_mark_target_info_v1 *cm = src;
|
2006-09-20 19:06:10 +00:00
|
|
|
struct xt_mark_target_info_v1 m = {
|
|
|
|
.mark = cm->mark,
|
|
|
|
.mode = cm->mode,
|
|
|
|
};
|
|
|
|
memcpy(dst, &m, sizeof(m));
|
|
|
|
}
|
|
|
|
|
2007-12-18 05:51:33 +00:00
|
|
|
static int mark_tg_compat_to_user_v1(void __user *dst, void *src)
|
2006-09-20 19:06:10 +00:00
|
|
|
{
|
2007-07-08 05:16:55 +00:00
|
|
|
const struct xt_mark_target_info_v1 *m = src;
|
2006-09-20 19:06:10 +00:00
|
|
|
struct compat_xt_mark_target_info_v1 cm = {
|
|
|
|
.mark = m->mark,
|
|
|
|
.mode = m->mode,
|
|
|
|
};
|
|
|
|
return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
|
2007-12-05 07:24:03 +00:00
|
|
|
static struct xt_target mark_tg_reg[] __read_mostly = {
|
2006-08-22 07:34:04 +00:00
|
|
|
{
|
|
|
|
.name = "MARK",
|
2008-10-08 09:35:20 +00:00
|
|
|
.family = NFPROTO_UNSPEC,
|
2006-08-22 07:34:04 +00:00
|
|
|
.revision = 0,
|
2007-12-05 07:24:03 +00:00
|
|
|
.checkentry = mark_tg_check_v0,
|
|
|
|
.target = mark_tg_v0,
|
2006-08-22 07:34:04 +00:00
|
|
|
.targetsize = sizeof(struct xt_mark_target_info),
|
2007-12-18 05:51:33 +00:00
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
.compatsize = sizeof(struct compat_xt_mark_target_info),
|
2008-01-15 07:38:52 +00:00
|
|
|
.compat_from_user = mark_tg_compat_from_user_v0,
|
|
|
|
.compat_to_user = mark_tg_compat_to_user_v0,
|
2007-12-18 05:51:33 +00:00
|
|
|
#endif
|
2006-08-22 07:34:04 +00:00
|
|
|
.table = "mangle",
|
|
|
|
.me = THIS_MODULE,
|
|
|
|
},
|
|
|
|
{
|
|
|
|
.name = "MARK",
|
2008-10-08 09:35:20 +00:00
|
|
|
.family = NFPROTO_UNSPEC,
|
2007-12-18 05:51:14 +00:00
|
|
|
.revision = 1,
|
2008-01-15 07:38:52 +00:00
|
|
|
.checkentry = mark_tg_check_v1,
|
|
|
|
.target = mark_tg_v1,
|
2007-12-18 05:51:14 +00:00
|
|
|
.targetsize = sizeof(struct xt_mark_target_info_v1),
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
.compatsize = sizeof(struct compat_xt_mark_target_info_v1),
|
2007-12-18 05:51:33 +00:00
|
|
|
.compat_from_user = mark_tg_compat_from_user_v1,
|
|
|
|
.compat_to_user = mark_tg_compat_to_user_v1,
|
2007-12-18 05:51:14 +00:00
|
|
|
#endif
|
|
|
|
.table = "mangle",
|
|
|
|
.me = THIS_MODULE,
|
|
|
|
},
|
2008-01-15 07:38:52 +00:00
|
|
|
{
|
|
|
|
.name = "MARK",
|
|
|
|
.revision = 2,
|
2008-10-08 09:35:01 +00:00
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|
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.family = NFPROTO_UNSPEC,
|
2008-01-15 07:38:52 +00:00
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.target = mark_tg,
|
|
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.targetsize = sizeof(struct xt_mark_tginfo2),
|
|
|
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.me = THIS_MODULE,
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|
|
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},
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[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
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};
|
|
|
|
|
2007-12-05 07:24:03 +00:00
|
|
|
static int __init mark_tg_init(void)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-12-05 07:24:03 +00:00
|
|
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return xt_register_targets(mark_tg_reg, ARRAY_SIZE(mark_tg_reg));
|
2005-04-16 22:20:36 +00:00
|
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}
|
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|
|
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2007-12-05 07:24:03 +00:00
|
|
|
static void __exit mark_tg_exit(void)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-12-05 07:24:03 +00:00
|
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xt_unregister_targets(mark_tg_reg, ARRAY_SIZE(mark_tg_reg));
|
2005-04-16 22:20:36 +00:00
|
|
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}
|
|
|
|
|
2007-12-05 07:24:03 +00:00
|
|
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module_init(mark_tg_init);
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|
module_exit(mark_tg_exit);
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