[NETFILTER]: nf_conntrack/nf_nat: add H.323 helper port

Add IPv4 and IPv6 capable nf_conntrack port of the H.323 conntrack/NAT helper.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 113 insertions, 8 deletions

diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h
new file mode 100644
index 0000000..08e2f49
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_h323.h
@@ -0,0 +1,92 @@
+#ifndef _NF_CONNTRACK_H323_H
+#define _NF_CONNTRACK_H323_H
+
+#ifdef __KERNEL__
+
+#include <linux/netfilter/nf_conntrack_h323_asn1.h>
+
+#define RAS_PORT 1719
+#define Q931_PORT 1720
+#define H323_RTP_CHANNEL_MAX 4	/* Audio, video, FAX and other */
+
+/* This structure exists only once per master */
+struct nf_ct_h323_master {
+
+	/* Original and NATed Q.931 or H.245 signal ports */
+	__be16 sig_port[IP_CT_DIR_MAX];
+
+	/* Original and NATed RTP ports */
+	__be16 rtp_port[H323_RTP_CHANNEL_MAX][IP_CT_DIR_MAX];
+
+	union {
+		/* RAS connection timeout */
+		u_int32_t timeout;
+
+		/* Next TPKT length (for separate TPKT header and data) */
+		u_int16_t tpkt_len[IP_CT_DIR_MAX];
+	};
+};
+
+struct nf_conn;
+
+extern int get_h225_addr(struct nf_conn *ct, unsigned char *data,
+			 TransportAddress *taddr,
+			 union nf_conntrack_address *addr, __be16 *port);
+extern void nf_conntrack_h245_expect(struct nf_conn *new,
+				     struct nf_conntrack_expect *this);
+extern void nf_conntrack_q931_expect(struct nf_conn *new,
+				     struct nf_conntrack_expect *this);
+extern int (*set_h245_addr_hook) (struct sk_buff **pskb,
+				  unsigned char **data, int dataoff,
+				  H245_TransportAddress *taddr,
+				  union nf_conntrack_address *addr,
+				  __be16 port);
+extern int (*set_h225_addr_hook) (struct sk_buff **pskb,
+				  unsigned char **data, int dataoff,
+				  TransportAddress *taddr,
+				  union nf_conntrack_address *addr,
+				  __be16 port);
+extern int (*set_sig_addr_hook) (struct sk_buff **pskb,
+				 struct nf_conn *ct,
+				 enum ip_conntrack_info ctinfo,
+				 unsigned char **data,
+				 TransportAddress *taddr, int count);
+extern int (*set_ras_addr_hook) (struct sk_buff **pskb,
+				 struct nf_conn *ct,
+				 enum ip_conntrack_info ctinfo,
+				 unsigned char **data,
+				 TransportAddress *taddr, int count);
+extern int (*nat_rtp_rtcp_hook) (struct sk_buff **pskb,
+				 struct nf_conn *ct,
+				 enum ip_conntrack_info ctinfo,
+				 unsigned char **data, int dataoff,
+				 H245_TransportAddress *taddr,
+				 __be16 port, __be16 rtp_port,
+				 struct nf_conntrack_expect *rtp_exp,
+				 struct nf_conntrack_expect *rtcp_exp);
+extern int (*nat_t120_hook) (struct sk_buff **pskb, struct nf_conn *ct,
+			     enum ip_conntrack_info ctinfo,
+			     unsigned char **data, int dataoff,
+			     H245_TransportAddress *taddr, __be16 port,
+			     struct nf_conntrack_expect *exp);
+extern int (*nat_h245_hook) (struct sk_buff **pskb, struct nf_conn *ct,
+			     enum ip_conntrack_info ctinfo,
+			     unsigned char **data, int dataoff,
+			     TransportAddress *taddr, __be16 port,
+			     struct nf_conntrack_expect *exp);
+extern int (*nat_callforwarding_hook) (struct sk_buff **pskb,
+				       struct nf_conn *ct,
+				       enum ip_conntrack_info ctinfo,
+				       unsigned char **data, int dataoff,
+				       TransportAddress *taddr,
+				       __be16 port,
+				       struct nf_conntrack_expect *exp);
+extern int (*nat_q931_hook) (struct sk_buff **pskb, struct nf_conn *ct,
+			     enum ip_conntrack_info ctinfo,
+			     unsigned char **data, TransportAddress *taddr,
+			     int idx, __be16 port,
+			     struct nf_conntrack_expect *exp);
+
+#endif
+
+#endif
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h b/include/linux/netfilter/nf_conntrack_h323_asn1.h
index c6e9a0b..8dab596 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h
+++ b/include/linux/netfilter/nf_conntrack_h323_asn1.h
@@ -1,6 +1,6 @@
 /****************************************************************************
- * ip_conntrack_helper_h323_asn1.h - BER and PER decoding library for H.323
- * 			      	     conntrack/NAT module.
+ * ip_conntrack_h323_asn1.h - BER and PER decoding library for H.323
+ * 			      conntrack/NAT module.
  *
  * Copyright (c) 2006 by Jing Min Zhao <zhaojingmin@users.sourceforge.net>
  *
@@ -34,13 +34,13 @@
  *
  ****************************************************************************/
 
-#ifndef _IP_CONNTRACK_HELPER_H323_ASN1_H_
-#define _IP_CONNTRACK_HELPER_H323_ASN1_H_
+#ifndef _NF_CONNTRACK_HELPER_H323_ASN1_H_
+#define _NF_CONNTRACK_HELPER_H323_ASN1_H_
 
 /*****************************************************************************
  * H.323 Types
  ****************************************************************************/
-#include "ip_conntrack_helper_h323_types.h"
+#include "nf_conntrack_h323_types.h"
 
 typedef struct {
 	enum {
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h b/include/linux/netfilter/nf_conntrack_h323_types.h
index 3d4a773..38d74d5 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h
+++ b/include/linux/netfilter/nf_conntrack_h323_types.h
@@ -10,6 +10,11 @@ typedef struct TransportAddress_ipAddress {	/* SEQUENCE */
 	unsigned ip;
 } TransportAddress_ipAddress;
 
+typedef struct TransportAddress_ip6Address {	/* SEQUENCE */
+	int options;		/* No use */
+	unsigned ip6;
+} TransportAddress_ip6Address;
+
 typedef struct TransportAddress {	/* CHOICE */
 	enum {
 		eTransportAddress_ipAddress,
@@ -22,6 +27,7 @@ typedef struct TransportAddress {	/* CHOICE */
 	} choice;
 	union {
 		TransportAddress_ipAddress ipAddress;
+		TransportAddress_ip6Address ip6Address;
 	};
 } TransportAddress;
 
@@ -93,6 +99,11 @@ typedef struct UnicastAddress_iPAddress {	/* SEQUENCE */
 	unsigned network;
 } UnicastAddress_iPAddress;
 
+typedef struct UnicastAddress_iP6Address {	/* SEQUENCE */
+	int options;		/* No use */
+	unsigned network;
+} UnicastAddress_iP6Address;
+
 typedef struct UnicastAddress {	/* CHOICE */
 	enum {
 		eUnicastAddress_iPAddress,
@@ -105,6 +116,7 @@ typedef struct UnicastAddress {	/* CHOICE */
 	} choice;
 	union {
 		UnicastAddress_iPAddress iPAddress;
+		UnicastAddress_iP6Address iP6Address;
 	};
 } UnicastAddress;
 
diff --git a/include/linux/netfilter_ipv4/Kbuild b/include/linux/netfilter_ipv4/Kbuild
index 591c1a8..1803378 100644
--- a/include/linux/netfilter_ipv4/Kbuild
+++ b/include/linux/netfilter_ipv4/Kbuild
@@ -1,6 +1,4 @@
 header-y += ip_conntrack_helper.h
-header-y += ip_conntrack_helper_h323_asn1.h
-header-y += ip_conntrack_helper_h323_types.h
 header-y += ip_conntrack_protocol.h
 header-y += ip_conntrack_sctp.h
 header-y += ip_conntrack_tcp.h
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_h323.h b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
index 943cc6a..18f7698 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_h323.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
@@ -3,7 +3,7 @@
 
 #ifdef __KERNEL__
 
-#include <linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h>
+#include <linux/netfilter/nf_conntrack_h323_asn1.h>
 
 #define RAS_PORT 1719
 #define Q931_PORT 1720
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index 83694cf..1646076 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -41,11 +41,13 @@ union nf_conntrack_expect_proto {
 
 /* Add protocol helper include file here */
 #include <linux/netfilter/nf_conntrack_ftp.h>
+#include <linux/netfilter/nf_conntrack_h323.h>
 
 /* per conntrack: application helper private data */
 union nf_conntrack_help {
 	/* insert conntrack helper private data (master) here */
 	struct nf_ct_ftp_master ct_ftp_info;
+	struct nf_ct_h323_master ct_h323_info;
 };
 
 #include <linux/types.h>
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index 54a3d03..cef3136 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -41,6 +41,7 @@ struct nf_conntrack_expect
 	unsigned int flags;
 
 #ifdef CONFIG_NF_NAT_NEEDED
+	__be32 saved_ip;
 	/* This is the original per-proto part, used to map the
 	 * expected connection the way the recipient expects. */
 	union nf_conntrack_man_proto saved_proto;