/* * Copyright (c) 2000 jPOS.org.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * * 2. 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. * * 3. The end-user documentation included with the redistribution, *    if any, must include the following acknowledgment: *    "This product includes software developed by the jPOS project  *    (http://www.jpos.org/)". Alternately, this acknowledgment may  *    appear in the software itself, if and wherever such third-party  *    acknowledgments normally appear. * * 4. The names "jPOS" and "jPOS.org" must not be used to endorse  *    or promote products derived from this software without prior  *    written permission. For written permission, please contact  *    license@jpos.org. * * 5. Products derived from this software may not be called "jPOS", *    nor may "jPOS" appear in their name, without prior written *    permission of the jPOS project. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 JPOS PROJECT OR ITS 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. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the jPOS Project.  For more * information please see <http://www.jpos.org/>. */package org.jpos.iso.channel;import java.io.IOException;import java.net.ServerSocket;import org.jpos.iso.BaseChannel;import org.jpos.iso.ISOException;import org.jpos.iso.ISOMsg;import org.jpos.iso.ISOPackager;import org.jpos.iso.ISOUtil;import org.jpos.util.LogEvent;import org.jpos.util.Logger;/** * Implements an ISOChannel able to exchange messages with * ACI's BASE24 over a TCP link, modified from BASE24ISOChannel  * by Victor A. Salaman (salaman@teknos.com) .<br> * An instance of this class exchanges messages by means of an * intermediate 'port server' as described in the * <a href="/doc/javadoc/overview-summary.html">Overview</a> page. * @author apr@cs.com.uy * @author salaman@teknos.com * * @version $Id: BASE24TCPChannel.java,v 1.6 2003/05/16 04:15:17 alwyns Exp $ * * @see ISOMsg * @see ISOException * @see ISOChannel */public class BASE24TCPChannel extends BaseChannel {    /**     * Public constructor (used by Class.forName("...").newInstance())     */    public BASE24TCPChannel () {        super();    }    /**     * Construct client ISOChannel     * @param host  server TCP Address     * @param port  server port number     * @param p     an ISOPackager     * @see ISOPackager     */    public BASE24TCPChannel (String host, int port, ISOPackager p) {        super(host, port, p);    }    /**     * Construct server ISOChannel     * @param p     an ISOPackager     * @see ISOPackager     * @exception IOException     */    public BASE24TCPChannel (ISOPackager p) throws IOException {        super(p);    }    /**     * constructs a server ISOChannel associated with a Server Socket     * @param p     an ISOPackager     * @param serverSocket where to accept a connection     * @exception IOException     * @see ISOPackager     */    public BASE24TCPChannel (ISOPackager p, ServerSocket serverSocket)         throws IOException    {        super(p, serverSocket);    }    /**     * @param m the Message to send (in this case it is unused)     * @param len   message len (ignored)     * @exception IOException     */    protected void sendMessageTrailler(ISOMsg m, int len) throws IOException {        serverOut.write (3);    }    protected void sendMessageLength(int len) throws IOException {        len++;  // one byte trailler        serverOut.write (len >> 8);        serverOut.write (len);    }    protected int getMessageLength() throws IOException, ISOException {        int l = 0;        byte[] b = new byte[2];        Logger.log (new LogEvent (this, "get-message-length"));        while (l == 0) {            serverIn.readFully(b,0,2);            l = ((((int)b[0])&0xFF) << 8) | (((int)b[1])&0xFF);            if (l == 0) {                serverOut.write(b);                serverOut.flush();            }        }        Logger.log (new LogEvent (this, "got-message-length", Integer.toString(l)));        return l - 1;   // trailler length    }    protected void getMessageTrailler() throws IOException {        Logger.log (new LogEvent (this, "get-message-trailler"));        byte[] b = new byte[1];        serverIn.readFully(b,0,1);        Logger.log (new LogEvent (this, "got-message-trailler", ISOUtil.hexString(b)));    }}