From df85ae417f865bf392f92913fde858d777af7811 Mon Sep 17 00:00:00 2001
From: damencho <damencho@jitsi.org>
Date: Tue, 7 Feb 2017 22:27:54 +0200
Subject: Updates libjitsi and sends hole punch packets for audio.

When sending hole punch packets, use as a content a generated rtp
packet.
---
 .../protocol/media/CallPeerMediaHandler.java       | 30 +++++++++++++++++++---
 .../service/protocol/media/TransportManager.java   | 21 ++++++++++++++-
 2 files changed, 46 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/net/java/sip/communicator/service/protocol/media/CallPeerMediaHandler.java b/src/net/java/sip/communicator/service/protocol/media/CallPeerMediaHandler.java
index c8a3a12..ead01d1 100644
--- a/src/net/java/sip/communicator/service/protocol/media/CallPeerMediaHandler.java
+++ b/src/net/java/sip/communicator/service/protocol/media/CallPeerMediaHandler.java
@@ -87,6 +87,16 @@ public abstract class CallPeerMediaHandler<T extends MediaAwareCallPeer<?,?,?>>
     public static final String VIDEO_REMOTE_SSRC = "VIDEO_REMOTE_SSRC";
 
     /**
+     * The initial content of a hole punch packet. It has some fields pre-set.
+     * Like rtp verion, sequence number and timestamp.
+     */
+    private static final byte[] HOLE_PUNCH_PACKET =
+    {
+        (byte)0x80, 0x00, 0x02, (byte)0x9E, 0x00, 0x09,
+        (byte)0xD0, (byte)0x80, 0x00, 0x00, 0x00, (byte)0x00,
+    };
+
+    /**
      * List of advertised encryption methods. Indicated before establishing the
      * call.
      */
@@ -1575,11 +1585,21 @@ public abstract class CallPeerMediaHandler<T extends MediaAwareCallPeer<?,?,?>>
      * to open port on NAT or RTP proxy if any. In order to be really efficient,
      * this method should be called after we send our offer or answer.
      *
-     * @param target <tt>MediaStreamTarget</tt>
+     * @param stream <tt>MediaStream</tt> non-null stream
+     * @param mediaType <tt>MediaType</tt>
      */
-    protected void sendHolePunchPacket(MediaStreamTarget target)
+    protected void sendHolePunchPacket(MediaStream stream, MediaType mediaType)
     {
-        getTransportManager().sendHolePunchPacket(target, MediaType.VIDEO);
+        // send as a hole punch packet a constructed rtp packet
+        // has the correct payload type and ssrc
+        RawPacket packet = new RawPacket(
+            HOLE_PUNCH_PACKET, 0, RawPacket.FIXED_HEADER_SIZE);
+        packet.setPayloadType(
+            dynamicPayloadTypes.getPayloadType(stream.getFormat()));
+        packet.setSSRC((int)stream.getLocalSourceID());
+
+        getTransportManager().sendHolePunchPacket(
+            stream.getTarget(), mediaType, packet);
     }
 
     /**
@@ -1936,6 +1956,8 @@ public abstract class CallPeerMediaHandler<T extends MediaAwareCallPeer<?,?,?>>
                     stream.getTarget(),
                     MediaType.AUDIO);
             stream.start();
+
+            sendHolePunchPacket(stream, MediaType.AUDIO);
         }
 
         stream = getStream(MediaType.VIDEO);
@@ -1964,7 +1986,7 @@ public abstract class CallPeerMediaHandler<T extends MediaAwareCallPeer<?,?,?>>
                  * send the hole-punch packet anyway to let the remote video
                  * reach this local peer.
                  */
-                sendHolePunchPacket(stream.getTarget());
+                sendHolePunchPacket(stream, MediaType.VIDEO);
             }
         }
     }
diff --git a/src/net/java/sip/communicator/service/protocol/media/TransportManager.java b/src/net/java/sip/communicator/service/protocol/media/TransportManager.java
index a8222e0..051a302 100644
--- a/src/net/java/sip/communicator/service/protocol/media/TransportManager.java
+++ b/src/net/java/sip/communicator/service/protocol/media/TransportManager.java
@@ -516,6 +516,21 @@ public abstract class TransportManager<U extends MediaAwareCallPeer<?, ?, ?>>
      */
     public void sendHolePunchPacket(MediaStreamTarget target, MediaType type)
     {
+        this.sendHolePunchPacket(target, type, null);
+    }
+
+    /**
+     * Sends empty UDP packets to target destination data/control ports in order
+     * to open ports on NATs or and help RTP proxies latch onto our RTP ports.
+     *
+     * @param target <tt>MediaStreamTarget</tt>
+     * @param type the {@link MediaType} of the connector we'd like to send the
+     * hole punching packet through.
+     * @param packet (optional) use a pre-generated packet that will be sent
+     */
+    public void sendHolePunchPacket(
+        MediaStreamTarget target, MediaType type, RawPacket packet)
+    {
         logger.info("Send NAT hole punch packets");
 
         //check how many hole punch packets we would be supposed to send:
@@ -536,7 +551,11 @@ public abstract class TransportManager<U extends MediaAwareCallPeer<?, ?, ?>>
             if(connector.getProtocol() == StreamConnector.Protocol.TCP)
                 return;
 
-            byte[] buf = new byte[0];
+            byte[] buf;
+            if (packet != null)
+                buf = packet.getBuffer();
+            else
+                buf = new byte[0];
 
             synchronized(connector)
             {
-- 
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