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[NETFILTER]: x_tables: unify IPv4/IPv6 multiport match

Browse Source 
This unifies ipt_multiport and ip6t_multiport to xt_multiport.
As a result, this addes support for inversion and port range match
to IPv6 packets.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yasuyuki Kozakai 2006-04-01 02:22:54 -08:00 committed by David S. Miller
parent dc5ab2faec
commit a89ecb6a2e
12 changed files with 372 additions and 381 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
include/linux/netfilter/xt_multiport.h Normal file
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@ -0,0 +1,30 @@
#ifndef _XT_MULTIPORT_H
#define _XT_MULTIPORT_H
enum xt_multiport_flags
{
XT_MULTIPORT_SOURCE,
XT_MULTIPORT_DESTINATION,
XT_MULTIPORT_EITHER
};
#define XT_MULTI_PORTS 15
/* Must fit inside union xt_matchinfo: 16 bytes */
struct xt_multiport
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[XT_MULTI_PORTS]; /* Ports */
};
struct xt_multiport_v1
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[XT_MULTI_PORTS]; /* Ports */
u_int8_t pflags[XT_MULTI_PORTS]; /* Port flags */
u_int8_t invert; /* Invert flag */
};
#endif /*_XT_MULTIPORT_H*/

31
include/linux/netfilter_ipv4/ipt_multiport.h
View File

@ -1,30 +1,15 @@
#ifndef _IPT_MULTIPORT_H
#define _IPT_MULTIPORT_H
#include <linux/netfilter_ipv4/ip_tables.h>
enum ipt_multiport_flags
{
IPT_MULTIPORT_SOURCE,
IPT_MULTIPORT_DESTINATION,
IPT_MULTIPORT_EITHER
};
#include <linux/netfilter/xt_multiport.h>
#define IPT_MULTI_PORTS 15
#define IPT_MULTIPORT_SOURCE XT_MULTIPORT_SOURCE
#define IPT_MULTIPORT_DESTINATION XT_MULTIPORT_DESTINATION
#define IPT_MULTIPORT_EITHER XT_MULTIPORT_EITHER
/* Must fit inside union ipt_matchinfo: 16 bytes */
struct ipt_multiport
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[IPT_MULTI_PORTS]; /* Ports */
};
#define IPT_MULTI_PORTS XT_MULTI_PORTS
#define ipt_multiport xt_multiport
#define ipt_multiport_v1 xt_multiport_v1
struct ipt_multiport_v1
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[IPT_MULTI_PORTS]; /* Ports */
u_int8_t pflags[IPT_MULTI_PORTS]; /* Port flags */
u_int8_t invert; /* Invert flag */
};
#endif /*_IPT_MULTIPORT_H*/

25
include/linux/netfilter_ipv6/ip6t_multiport.h
View File

@ -1,21 +1,14 @@
#ifndef _IP6T_MULTIPORT_H
#define _IP6T_MULTIPORT_H
#include <linux/netfilter_ipv6/ip6_tables.h>
enum ip6t_multiport_flags
{
IP6T_MULTIPORT_SOURCE,
IP6T_MULTIPORT_DESTINATION,
IP6T_MULTIPORT_EITHER
};
#include <linux/netfilter/xt_multiport.h>
#define IP6T_MULTI_PORTS 15
#define IP6T_MULTIPORT_SOURCE XT_MULTIPORT_SOURCE
#define IP6T_MULTIPORT_DESTINATION XT_MULTIPORT_DESTINATION
#define IP6T_MULTIPORT_EITHER XT_MULTIPORT_EITHER
/* Must fit inside union ip6t_matchinfo: 16 bytes */
struct ip6t_multiport
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[IP6T_MULTI_PORTS]; /* Ports */
};
#endif /*_IPT_MULTIPORT_H*/
#define IP6T_MULTI_PORTS XT_MULTI_PORTS
#define ip6t_multiport xt_multiport
#endif /*_IP6T_MULTIPORT_H*/

10
net/ipv4/netfilter/Kconfig
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@ -221,16 +221,6 @@ config IP_NF_MATCH_IPRANGE
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_MATCH_MULTIPORT
tristate "Multiple port match support"
depends on IP_NF_IPTABLES
help
Multiport matching allows you to match TCP or UDP packets based on
a series of source or destination ports: normally a rule can only
match a single range of ports.
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_MATCH_TOS
tristate "TOS match support"
depends on IP_NF_IPTABLES

1
net/ipv4/netfilter/Makefile
View File

@ -53,7 +53,6 @@ obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o
# matches
obj-$(CONFIG_IP_NF_MATCH_HASHLIMIT) += ipt_hashlimit.o
obj-$(CONFIG_IP_NF_MATCH_IPRANGE) += ipt_iprange.o
obj-$(CONFIG_IP_NF_MATCH_MULTIPORT) += ipt_multiport.o
obj-$(CONFIG_IP_NF_MATCH_OWNER) += ipt_owner.o
obj-$(CONFIG_IP_NF_MATCH_TOS) += ipt_tos.o
obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o

195
net/ipv4/netfilter/ipt_multiport.c
View File

@ -1,195 +0,0 @@
/* Kernel module to match one of a list of TCP/UDP ports: ports are in
the same place so we can treat them as equal. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
*
* 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/types.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/netfilter_ipv4/ipt_multiport.h>
#include <linux/netfilter_ipv4/ip_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("iptables multiple port match module");
#if 0
#define duprintf(format, args...) printk(format , ## args)
#else
#define duprintf(format, args...)
#endif
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
ports_match(const u_int16_t *portlist, enum ipt_multiport_flags flags,
u_int8_t count, u_int16_t src, u_int16_t dst)
{
unsigned int i;
for (i=0; i<count; i++) {
if (flags != IPT_MULTIPORT_DESTINATION
&& portlist[i] == src)
return 1;
if (flags != IPT_MULTIPORT_SOURCE
&& portlist[i] == dst)
return 1;
}
return 0;
}
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
ports_match_v1(const struct ipt_multiport_v1 *minfo,
u_int16_t src, u_int16_t dst)
{
unsigned int i;
u_int16_t s, e;
for (i=0; i < minfo->count; i++) {
s = minfo->ports[i];
if (minfo->pflags[i]) {
/* range port matching */
e = minfo->ports[++i];
duprintf("src or dst matches with %d-%d?\n", s, e);
if (minfo->flags == IPT_MULTIPORT_SOURCE
&& src >= s && src <= e)
return 1 ^ minfo->invert;
if (minfo->flags == IPT_MULTIPORT_DESTINATION
&& dst >= s && dst <= e)
return 1 ^ minfo->invert;
if (minfo->flags == IPT_MULTIPORT_EITHER
&& ((dst >= s && dst <= e)
|| (src >= s && src <= e)))
return 1 ^ minfo->invert;
} else {
/* exact port matching */
duprintf("src or dst matches with %d?\n", s);
if (minfo->flags == IPT_MULTIPORT_SOURCE
&& src == s)
return 1 ^ minfo->invert;
if (minfo->flags == IPT_MULTIPORT_DESTINATION
&& dst == s)
return 1 ^ minfo->invert;
if (minfo->flags == IPT_MULTIPORT_EITHER
&& (src == s || dst == s))
return 1 ^ minfo->invert;
}
}
return minfo->invert;
}
static int
match(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,
int *hotdrop)
{
u16 _ports[2], *pptr;
const struct ipt_multiport *multiinfo = matchinfo;
if (offset)
return 0;
pptr = skb_header_pointer(skb, protoff,
sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("ipt_multiport:"
" Dropping evil offset=0 tinygram.\n");
*hotdrop = 1;
return 0;
}
return ports_match(multiinfo->ports,
multiinfo->flags, multiinfo->count,
ntohs(pptr[0]), ntohs(pptr[1]));
}
static int
match_v1(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,
int *hotdrop)
{
u16 _ports[2], *pptr;
const struct ipt_multiport_v1 *multiinfo = matchinfo;
if (offset)
return 0;
pptr = skb_header_pointer(skb, protoff,
sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("ipt_multiport:"
" Dropping evil offset=0 tinygram.\n");
*hotdrop = 1;
return 0;
}
return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1]));
}
static struct ipt_match multiport_match = {
.name = "multiport",
.revision = 0,
.match = match,
.matchsize = sizeof(struct ipt_multiport),
.me = THIS_MODULE,
};
static struct ipt_match multiport_match_v1 = {
.name = "multiport",
.revision = 1,
.match = match_v1,
.matchsize = sizeof(struct ipt_multiport_v1),
.me = THIS_MODULE,
};
static int __init ipt_multiport_init(void)
{
int err;
err = ipt_register_match(&multiport_match);
if (!err) {
err = ipt_register_match(&multiport_match_v1);
if (err)
ipt_unregister_match(&multiport_match);
}
return err;
}
static void __exit ipt_multiport_fini(void)
{
ipt_unregister_match(&multiport_match);
ipt_unregister_match(&multiport_match_v1);
}
module_init(ipt_multiport_init);
module_exit(ipt_multiport_fini);

10
net/ipv6/netfilter/Kconfig
View File

@ -87,16 +87,6 @@ config IP6_NF_MATCH_HL
To compile it as a module, choose M here. If unsure, say N.
config IP6_NF_MATCH_MULTIPORT
tristate "Multiple port match support"
depends on IP6_NF_IPTABLES
help
Multiport matching allows you to match TCP or UDP packets based on
a series of source or destination ports: normally a rule can only
match a single range of ports.
To compile it as a module, choose M here. If unsure, say N.
config IP6_NF_MATCH_OWNER
tristate "Owner match support"
depends on IP6_NF_IPTABLES

1
net/ipv6/netfilter/Makefile
View File

@ -10,7 +10,6 @@ obj-$(CONFIG_IP6_NF_MATCH_IPV6HEADER) += ip6t_ipv6header.o
obj-$(CONFIG_IP6_NF_MATCH_FRAG) += ip6t_frag.o
obj-$(CONFIG_IP6_NF_MATCH_AH) += ip6t_ah.o
obj-$(CONFIG_IP6_NF_MATCH_EUI64) += ip6t_eui64.o
obj-$(CONFIG_IP6_NF_MATCH_MULTIPORT) += ip6t_multiport.o
obj-$(CONFIG_IP6_NF_MATCH_OWNER) += ip6t_owner.o
obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o

125
net/ipv6/netfilter/ip6t_multiport.c
View File

@ -1,125 +0,0 @@
/* Kernel module to match one of a list of TCP/UDP ports: ports are in
the same place so we can treat them as equal. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
*
* 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/types.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/netfilter_ipv6/ip6t_multiport.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("ip6tables match for multiple ports");
#if 0
#define duprintf(format, args...) printk(format , ## args)
#else
#define duprintf(format, args...)
#endif
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
ports_match(const u_int16_t *portlist, enum ip6t_multiport_flags flags,
u_int8_t count, u_int16_t src, u_int16_t dst)
{
unsigned int i;
for (i=0; i<count; i++) {
if (flags != IP6T_MULTIPORT_DESTINATION
&& portlist[i] == src)
return 1;
if (flags != IP6T_MULTIPORT_SOURCE
&& portlist[i] == dst)
return 1;
}
return 0;
}
static int
match(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,
int *hotdrop)
{
u16 _ports[2], *pptr;
const struct ip6t_multiport *multiinfo = matchinfo;
/* Must not be a fragment. */
if (offset)
return 0;
/* Must be big enough to read ports (both UDP and TCP have
them at the start). */
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), &_ports[0]);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("ip6t_multiport:"
" Dropping evil offset=0 tinygram.\n");
*hotdrop = 1;
return 0;
}
return ports_match(multiinfo->ports,
multiinfo->flags, multiinfo->count,
ntohs(pptr[0]), ntohs(pptr[1]));
}
/* Called when user tries to insert an entry of this type. */
static int
checkentry(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
const struct ip6t_ip6 *ip = info;
const struct ip6t_multiport *multiinfo = matchinfo;
/* Must specify proto == TCP/UDP, no unknown flags or bad count */
return (ip->proto == IPPROTO_TCP || ip->proto == IPPROTO_UDP)
&& !(ip->invflags & IP6T_INV_PROTO)
&& (multiinfo->flags == IP6T_MULTIPORT_SOURCE
|| multiinfo->flags == IP6T_MULTIPORT_DESTINATION
|| multiinfo->flags == IP6T_MULTIPORT_EITHER)
&& multiinfo->count <= IP6T_MULTI_PORTS;
}
static struct ip6t_match multiport_match = {
.name = "multiport",
.match = match,
.matchsize = sizeof(struct ip6t_multiport),
.checkentry = checkentry,
.me = THIS_MODULE,
};
static int __init ip6t_multiport_init(void)
{
return ip6t_register_match(&multiport_match);
}
static void __exit ip6t_multiport_fini(void)
{
ip6t_unregister_match(&multiport_match);
}
module_init(ip6t_multiport_init);
module_exit(ip6t_multiport_fini);

10
net/netfilter/Kconfig
View File

@ -298,6 +298,16 @@ config NETFILTER_XT_MATCH_POLICY
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_MATCH_MULTIPORT
tristate "Multiple port match support"
depends on NETFILTER_XTABLES
help
Multiport matching allows you to match TCP or UDP packets based on
a series of source or destination ports: normally a rule can only
match a single range of ports.
To compile it as a module, choose M here. If unsure, say N.
config NETFILTER_XT_MATCH_PHYSDEV
tristate '"physdev" match support'
depends on NETFILTER_XTABLES && BRIDGE_NETFILTER

1
net/netfilter/Makefile
View File

@ -41,6 +41,7 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MAC) += xt_mac.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MARK) += xt_mark.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MULTIPORT) += xt_multiport.o
obj-$(CONFIG_NETFILTER_XT_MATCH_POLICY) += xt_policy.o
obj-$(CONFIG_NETFILTER_XT_MATCH_PKTTYPE) += xt_pkttype.o
obj-$(CONFIG_NETFILTER_XT_MATCH_REALM) += xt_realm.o

314
net/netfilter/xt_multiport.c Normal file
View File

@ -0,0 +1,314 @@
/* Kernel module to match one of a list of TCP/UDP ports: ports are in
the same place so we can treat them as equal. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
*
* 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/types.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/netfilter/xt_multiport.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("x_tables multiple port match module");
MODULE_ALIAS("ipt_multiport");
MODULE_ALIAS("ip6t_multiport");
#if 0
#define duprintf(format, args...) printk(format , ## args)
#else
#define duprintf(format, args...)
#endif
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
ports_match(const u_int16_t *portlist, enum xt_multiport_flags flags,
u_int8_t count, u_int16_t src, u_int16_t dst)
{
unsigned int i;
for (i = 0; i < count; i++) {
if (flags != XT_MULTIPORT_DESTINATION && portlist[i] == src)
return 1;
if (flags != XT_MULTIPORT_SOURCE && portlist[i] == dst)
return 1;
}
return 0;
}
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
ports_match_v1(const struct xt_multiport_v1 *minfo,
u_int16_t src, u_int16_t dst)
{
unsigned int i;
u_int16_t s, e;
for (i = 0; i < minfo->count; i++) {
s = minfo->ports[i];
if (minfo->pflags[i]) {
/* range port matching */
e = minfo->ports[++i];
duprintf("src or dst matches with %d-%d?\n", s, e);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src >= s && src <= e)
return 1 ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst >= s && dst <= e)
return 1 ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& ((dst >= s && dst <= e)
|| (src >= s && src <= e)))
return 1 ^ minfo->invert;
} else {
/* exact port matching */
duprintf("src or dst matches with %d?\n", s);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src == s)
return 1 ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst == s)
return 1 ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& (src == s || dst == s))
return 1 ^ minfo->invert;
}
}
return minfo->invert;
}
static int
match(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,
int *hotdrop)
{
u16 _ports[2], *pptr;
const struct xt_multiport *multiinfo = matchinfo;
if (offset)
return 0;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = 1;
return 0;
}
return ports_match(multiinfo->ports,
multiinfo->flags, multiinfo->count,
ntohs(pptr[0]), ntohs(pptr[1]));
}
static int
match_v1(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,
int *hotdrop)
{
u16 _ports[2], *pptr;
const struct xt_multiport_v1 *multiinfo = matchinfo;
if (offset)
return 0;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = 1;
return 0;
}
return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1]));
}
static inline int
check(u_int16_t proto,
u_int8_t ip_invflags,
u_int8_t match_flags,
u_int8_t count)
{
/* Must specify proto == TCP/UDP, no unknown flags or bad count */
return (proto == IPPROTO_TCP || proto == IPPROTO_UDP)
&& !(ip_invflags & XT_INV_PROTO)
&& (match_flags == XT_MULTIPORT_SOURCE
|| match_flags == XT_MULTIPORT_DESTINATION
|| match_flags == XT_MULTIPORT_EITHER)
&& count <= XT_MULTI_PORTS;
}
/* Called when user tries to insert an entry of this type. */
static int
checkentry(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
const struct ipt_ip *ip = info;
const struct xt_multiport *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static int
checkentry_v1(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
const struct ipt_ip *ip = info;
const struct xt_multiport_v1 *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static int
checkentry6(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
const struct ip6t_ip6 *ip = info;
const struct xt_multiport *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static int
checkentry6_v1(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int matchsize,
unsigned int hook_mask)
{
const struct ip6t_ip6 *ip = info;
const struct xt_multiport_v1 *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static struct xt_match multiport_match = {
.name = "multiport",
.revision = 0,
.matchsize = sizeof(struct xt_multiport),
.match = &match,
.checkentry = &checkentry,
.family = AF_INET,
.me = THIS_MODULE,
};
static struct xt_match multiport_match_v1 = {
.name = "multiport",
.revision = 1,
.matchsize = sizeof(struct xt_multiport_v1),
.match = &match_v1,
.checkentry = &checkentry_v1,
.family = AF_INET,
.me = THIS_MODULE,
};
static struct xt_match multiport6_match = {
.name = "multiport",
.revision = 0,
.matchsize = sizeof(struct xt_multiport),
.match = &match,
.checkentry = &checkentry6,
.family = AF_INET6,
.me = THIS_MODULE,
};
static struct xt_match multiport6_match_v1 = {
.name = "multiport",
.revision = 1,
.matchsize = sizeof(struct xt_multiport_v1),
.match = &match_v1,
.checkentry = &checkentry6_v1,
.family = AF_INET6,
.me = THIS_MODULE,
};
static int __init xt_multiport_init(void)
{
int ret;
ret = xt_register_match(&multiport_match);
if (ret)
goto out;
ret = xt_register_match(&multiport_match_v1);
if (ret)
goto out_unreg_multi_v0;
ret = xt_register_match(&multiport6_match);
if (ret)
goto out_unreg_multi_v1;
ret = xt_register_match(&multiport6_match_v1);
if (ret)
goto out_unreg_multi6_v0;
return ret;
out_unreg_multi6_v0:
xt_unregister_match(&multiport6_match);
out_unreg_multi_v1:
xt_unregister_match(&multiport_match_v1);
out_unreg_multi_v0:
xt_unregister_match(&multiport_match);
out:
return ret;
}
static void __exit xt_multiport_fini(void)
{
xt_unregister_match(&multiport_match);
xt_unregister_match(&multiport_match_v1);
xt_unregister_match(&multiport6_match);
xt_unregister_match(&multiport6_match_v1);
}
module_init(xt_multiport_init);
module_exit(xt_multiport_fini);