/* * UDPOutputDataStream.java * * Created on November 18, 2003, 11:33 PM */package gov.nist.applet.phone.media.protocol.transport;import javax.media.rtp.OutputDataStream;import java.net.InetAddress;import java.net.DatagramSocket;import java.net.DatagramPacket;/** * This class is an implementation of the OutputDataStream for * The UDP transport protocol underlying to RTP.  * @author  DERUELLE Jean */public class UDPOutputDataStream implements OutputDataStream{            private DatagramSocket sock;    private InetAddress addr;    private int port;    /**      * Creates a new instance of UDPOutputDataStream.     * @param sock - the UDP socket from which we will get the output stream.          * @param addr - the address of the remote host     * @param port - the port of the remote host     */    public UDPOutputDataStream(DatagramSocket sock, InetAddress addr, int port) {        this.sock = sock;        this.addr = addr;        this.port = port;    }    /**     * Write some data in the output stream.     * @param data - data to write.     * @param offset - the start offset in the data.     * @param len - the number of bytes to write.     * @return number of bytes written. -1 if there is any exception caught     */    public int write(byte data[], int offset, int len) {        try {            DatagramPacket p=new DatagramPacket(data, offset, len, addr, port);            //System.out.println("Sending RTP packet "+p+" to "+p.getAddress()+"/"+p.getPort());            sock.send(p);        } catch (Exception e) {                           return -1;        }        return len;    }    }