[NETFILTER]: Add H.323 conntrack/NAT helper

Signed-off-by: Jing Min Zhao <zhaojignmin@hotmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 32 insertions, 0 deletions

diff --git a/include/linux/netfilter_ipv4/ip_conntrack.h b/include/linux/netfilter_ipv4/ip_conntrack.h
index 215765f043e6..f32d75c4f4cf 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack.h
@@ -29,6 +29,7 @@ union ip_conntrack_expect_proto {
 };
 
 /* Add protocol helper include file here */
+#include <linux/netfilter_ipv4/ip_conntrack_h323.h>
 #include <linux/netfilter_ipv4/ip_conntrack_pptp.h>
 #include <linux/netfilter_ipv4/ip_conntrack_amanda.h>
 #include <linux/netfilter_ipv4/ip_conntrack_ftp.h>
@@ -37,6 +38,7 @@ union ip_conntrack_expect_proto {
 /* per conntrack: application helper private data */
 union ip_conntrack_help {
         /* insert conntrack helper private data (master) here */
+        struct ip_ct_h323_master ct_h323_info;
         struct ip_ct_pptp_master ct_pptp_info;
         struct ip_ct_ftp_master ct_ftp_info;
         struct ip_ct_irc_master ct_irc_info;
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_h323.h b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
new file mode 100644
index 000000000000..0987cea53840
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
@@ -0,0 +1,30 @@
+#ifndef _IP_CONNTRACK_H323_H
+#define _IP_CONNTRACK_H323_H
+
+#ifdef __KERNEL__
+
+#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 ip_ct_h323_master {
+
+        /* Original and NATed Q.931 or H.245 signal ports */
+        u_int16_t sig_port[IP_CT_DIR_MAX];
+
+        /* Original and NATed RTP ports */
+        u_int16_t 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];
+        };
+};
+
+#endif
+
+#endif