/*
* Copyright (C) 2005 Luca Veltri - University of Parma - Italy
*
* This file is part of MjSip (http://www.mjsip.org)
*
* MjSip is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MjSip is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MjSip; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author(s):
* Luca Veltri (luca.veltri@unipr.it)
*/
package org.zoolu.sip.provider;
import org.zoolu.net.*;
import org.zoolu.sip.message.Message;
import java.io.IOException;
/** TcpTransport provides a TCP trasport service for SIP.
*/
public class TcpTransport implements ConnectedTransport, TcpConnectionListener
{
/** TCP protocol type */
public static final String PROTO_TCP="tcp";
/** TCP connection */
protected TcpConnection tcp_conn;
/** TCP connection */
protected ConnectionIdentifier connection_id;
/** The last time that has been used (in milliseconds) */
protected long last_time;
/** the current received text. */
protected String text;
/** Transport listener */
protected TransportListener listener;
/** Creates a new TcpTransport */
public TcpTransport(IpAddress remote_ipaddr, int remote_port, TransportListener listener) throws IOException
{
this.listener=listener;
TcpSocket socket=new TcpSocket(remote_ipaddr,remote_port);
tcp_conn=new TcpConnection(socket,this);
connection_id=new ConnectionIdentifier(this);
last_time=System.currentTimeMillis();
text="";
}
/** Costructs a new TcpTransport */
public TcpTransport(TcpSocket socket, TransportListener listener)
{
this.listener=listener;
tcp_conn=new TcpConnection(socket,this);
connection_id=null;
last_time=System.currentTimeMillis();
text="";
}
/** Gets protocol type */
public String getProtocol()
{ return PROTO_TCP;
}
/** Gets the remote IpAddress */
public IpAddress getRemoteAddress()
{ if (tcp_conn!=null) return tcp_conn.getRemoteAddress();
else return null;
}
/** Gets the remote port */
public int getRemotePort()
{ if (tcp_conn!=null) return tcp_conn.getRemotePort();
else return 0;
}
/** Gets the last time the Connection has been used (in millisconds) */
public long getLastTimeMillis()
{ return last_time;
}
/** Sends a Message through the connection. Parameters <i>dest_addr</i>/<i>dest_addr</i>
* are not used, and the message is addressed to the connection remote peer.
* <p>Better use sendMessage(Message msg) method instead. */
public void sendMessage(Message msg, IpAddress dest_ipaddr, int dest_port) throws IOException
{ sendMessage(msg);
}
/** Sends a Message */
public void sendMessage(Message msg) throws IOException
{ if (tcp_conn!=null)
{ last_time=System.currentTimeMillis();
byte[] data=msg.toString().getBytes();
tcp_conn.send(data);
}
}
/** Stops running */
public void halt()
{ if (tcp_conn!=null) tcp_conn.halt();
}
/** Gets a String representation of the Object */
public String toString()
{ if (tcp_conn!=null) return tcp_conn.toString();
else return null;
}
//************************* Callback methods *************************
/** When new data is received through the TcpConnection. */
public void onReceivedData(TcpConnection tcp_conn, byte[] data, int len)
{
last_time=System.currentTimeMillis();
text+=new String(data,0,len);
SipParser par=new SipParser(text);
Message msg=par.getSipMessage();
while (msg!=null)
{
msg.setRemoteAddress(tcp_conn.getRemoteAddress().toString());
msg.setRemotePort(tcp_conn.getRemotePort());
msg.setTransport(PROTO_TCP);
msg.setConnectionId(connection_id);
if (listener!=null) listener.onReceivedMessage(this,msg);
text=par.getRemainingString();
par=new SipParser(text);
msg=par.getSipMessage();
}
}
/** When TcpConnection terminates. */
public void onConnectionTerminated(TcpConnection tcp_conn, Exception error)
{
if (listener!=null) listener.onTransportTerminated(this,error);
TcpSocket socket=tcp_conn.getSocket();
if (socket!=null) try { socket.close(); } catch (Exception e) {}
this.tcp_conn=null;
this.listener=null;
}
}