1 /*

     2  * Copyright (C) 2009 The Sipdroid Open Source Project

     3  * Copyright (C) 2005 Luca Veltri - University of Parma - Italy

     4  * 

     5  * This file is part of Sipdroid (http://www.sipdroid.org)

     6  * 

     7  * Sipdroid is free software; you can redistribute it and/or modify

     8  * it under the terms of the GNU General Public License as published by

     9  * the Free Software Foundation; either version 3 of the License, or

    10  * (at your option) any later version.

    11  * 

    12  * This source code is distributed in the hope that it will be useful,

    13  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    15  * GNU General Public License for more details.

    16  * 

    17  * You should have received a copy of the GNU General Public License

    18  * along with this source code; if not, write to the Free Software

    19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    20  */

    21 

    22 package src.org.sipdroid.net;

    23 

    24 import java.net.InetAddress;

    25 import java.net.DatagramPacket;

    26 import java.io.IOException;

    27 

    28 

    29 

    30 /**

    31  * RtpSocket implements a RTP socket for receiving and sending RTP packets.

    32  * <p>

    33  * RtpSocket is associated to a DatagramSocket that is used to send and/or

    34  * receive RtpPackets.

    35  */

    36 public class RtpSocket {

    37 	/** UDP socket */

    38 	SipdroidSocket socket;

    39 	DatagramPacket datagram;

    40 	

    41 	/** Remote address */

    42 	InetAddress r_addr;

    43 

    44 	/** Remote port */

    45 	int r_port;

    46 

    47 	/** Creates a new RTP socket (only receiver) */

    48 	public RtpSocket(SipdroidSocket datagram_socket) {

    49 		socket = datagram_socket;

    50 		r_addr = null;

    51 		r_port = 0;

    52 		datagram = new DatagramPacket(new byte[1],1);

    53 	}

    54 

    55 	/** Creates a new RTP socket (sender and receiver) */

    56 	public RtpSocket(SipdroidSocket datagram_socket,

    57 			InetAddress remote_address, int remote_port) {

    58 		socket = datagram_socket;

    59 		r_addr = remote_address;

    60 		r_port = remote_port;

    61 		datagram = new DatagramPacket(new byte[1],1);

    62 	}

    63 

    64 	/** Returns the RTP SipdroidSocket */

    65 	public SipdroidSocket getDatagramSocket() {

    66 		return socket;

    67 	}

    68 

    69 	/** Receives a RTP packet from this socket */

    70 	public void receive(RtpPacket rtpp) throws IOException {

    71 		datagram.setData(rtpp.packet);

    72 		datagram.setLength(rtpp.packet.length);

    73 		socket.receive(datagram);

    74 		if (!socket.isConnected())

    75 			socket.connect(datagram.getAddress(),datagram.getPort());

    76 		rtpp.packet_len = datagram.getLength();

    77 	}

    78 

    79 	/** Sends a RTP packet from this socket */

    80 	public void send(RtpPacket rtpp) throws IOException {

    81 		datagram.setData(rtpp.packet);

    82 		datagram.setLength(rtpp.packet_len);

    83 		datagram.setAddress(r_addr);

    84 		datagram.setPort(r_port);

    85 		socket.send(datagram);

    86 	}

    87 

    88 	/** Closes this socket */

    89 	public void close() { // socket.close();

    90 	}

    91 

    92 }