1 files changed, 146 insertions, 0 deletions
diff --git a/engine/src/networking/com/jme3/network/kernel/udp/UdpConnector.java b/engine/src/networking/com/jme3/network/kernel/udp/UdpConnector.java
new file mode 100644
index 0000000..0193e1c
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+++ b/engine/src/networking/com/jme3/network/kernel/udp/UdpConnector.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2011 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.network.kernel.udp;
+
+import com.jme3.network.kernel.Connector;
+import com.jme3.network.kernel.ConnectorException;
+import java.io.IOException;
+import java.net.*;
+import java.nio.ByteBuffer;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+
+/**
+ *  A straight forward datagram socket-based UDP connector 
+ *  implementation.
+ *
+ *  @version   $Revision: 8843 $
+ *  @author    Paul Speed
+ */
+public class UdpConnector implements Connector
+{
+    private DatagramSocket sock = new DatagramSocket();
+    private SocketAddress remoteAddress;
+    private byte[] buffer = new byte[65535];
+    private AtomicBoolean connected = new AtomicBoolean(false);
+
+    /**
+     *  In order to provide proper available() checking, we
+     *  potentially queue one datagram.
+     */
+    private DatagramPacket pending;
+
+    /**
+     *  Creates a new UDP connection that send datagrams to the
+     *  specified address and port.
+     */
+    public UdpConnector( InetAddress remote, int remotePort ) throws IOException
+    {
+        InetSocketAddress localSocketAddress = new InetSocketAddress(0);
+        this.sock = new DatagramSocket( localSocketAddress );
+        remoteAddress = new InetSocketAddress( remote, remotePort );
+        
+        // Setup to receive only from the remote address
+        sock.connect( remoteAddress );
+ 
+        connected.set(true);
+    }
+ 
+    protected void checkClosed()
+    {
+        if( sock == null )
+            throw new ConnectorException( "Connection is closed:" + remoteAddress );
+    }
+     
+    public boolean isConnected()
+    {
+        if( sock == null )
+            return false;
+        return sock.isConnected();
+    }
+
+    public void close()
+    {
+        checkClosed();
+        DatagramSocket temp = sock;
+        sock = null;
+        connected.set(false);            
+        temp.close();
+    }     
+
+    /**
+     *  This always returns false since the simple DatagramSocket usage
+     *  cannot be run in a non-blocking way.
+     */
+    public boolean available()
+    {
+        // It would take a separate thread or an NIO Selector based implementation to get this
+        // to work.  If a polling strategy is never employed by callers then it doesn't
+        // seem worth it to implement all of that just for this method.
+        checkClosed();
+        return false;
+    }     
+    
+    public ByteBuffer read()
+    {
+        checkClosed();
+        
+        try {
+            DatagramPacket packet = new DatagramPacket( buffer, buffer.length );
+            sock.receive(packet);
+            
+            // Wrap it in a ByteBuffer for the caller
+            return ByteBuffer.wrap( buffer, 0, packet.getLength() ); 
+        } catch( IOException e ) {
+            if( !connected.get() ) {
+                // Nothing to see here... just move along
+                return null;
+            }        
+            throw new ConnectorException( "Error reading from connection to:" + remoteAddress, e );    
+        }                
+    }
+    
+    public void write( ByteBuffer data )
+    {
+        checkClosed();
+        
+        try {
+            DatagramPacket p = new DatagramPacket( data.array(), data.position(), data.remaining(), 
+                                                   remoteAddress );
+            sock.send(p);
+        } catch( IOException e ) {
+            throw new ConnectorException( "Error writing to connection:" + remoteAddress, e );
+        }
+    }    
+}
+