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

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>

3 files changed, 0 insertions, 206 deletions

diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index ebbd644..77855cc 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -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
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 09ae167..461cb1e 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -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
diff --git a/net/ipv4/netfilter/ipt_multiport.c b/net/ipv4/netfilter/ipt_multiport.c
deleted file mode 100644
index ac95d83..0000000
--- a/net/ipv4/netfilter/ipt_multiport.c
+++ /dev/null
@@ -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);