nccchannel.java

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/*
 * 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 
 *    [e-mail].
 *
 * 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 
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
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 * 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.*;
import java.util.*;
import java.net.ServerSocket;
import java.net.Socket;
import org.jpos.iso.*;
import org.jpos.util.*;

/**
 * Talks with TCP based NCCs
 * Sends [LEN][TPDU][ISOMSG]
 * (len=2 bytes BCD)
 *
 * @author Alejandro P. Revilla
 * @version $Revision: 1.2 $ $Date: 2002/05/03 11:03:39 $
 * @see ISOMsg
 * @see ISOException
 * @see ISOChannel
 */
public class NCCChannel extends BaseChannel {
    /**
     * Public constructor 
     */
    public NCCChannel () {
        super();
    }
    /**
     * Construct client ISOChannel
     * @param host  server TCP Address
     * @param port  server port number
     * @param p     an ISOPackager
     * @param TPDU  an optional raw header (i.e. TPDU)
     * @see ISOPackager
     */
    public NCCChannel (String host, int port, ISOPackager p, byte[] TPDU) {
        super(host, port, p);
        this.header = TPDU;
    }
    /**
     * Construct server ISOChannel
     * @param p     an ISOPackager
     * @param TPDU  an optional raw header (i.e. TPDU)
     * @exception IOException
     * @see ISOPackager
     */
    public NCCChannel (ISOPackager p, byte[] TPDU) throws IOException {
        super(p);
        this.header = TPDU;
    }
    /**
     * constructs server ISOChannel associated with a Server Socket
     * @param p     an ISOPackager
     * @param TPDU  an optional raw header (i.e. TPDU)
     * @param serverSocket where to accept a connection
     * @exception IOException
     * @see ISOPackager
     */
    public NCCChannel (ISOPackager p, byte[] TPDU, ServerSocket serverSocket) 
        throws IOException
    {
        super(p, serverSocket);
        this.header = TPDU;
    }
    protected void sendMessageLength(int len) throws IOException {
        try {
            serverOut.write (
                ISOUtil.str2bcd (
                    ISOUtil.zeropad (Integer.toString (len % 10000), 4), true
                )
            );
        } 
        catch (ISOException e) {
            Logger.log (new LogEvent (this, "send-message-length", e));
        }
    }
    protected int getMessageLength() throws IOException, ISOException {
        byte[] b = new byte[2];
        serverIn.readFully(b,0,2);
        return Integer.parseInt (
            ISOUtil.bcd2str (b, 0, 4, true)
        );
    }
    protected void sendMessageHeader(ISOMsg m, int len) throws IOException { 
        byte[] h = m.getHeader();
        if (h != null) {
            if (h.length == 5) {
                // swap src/dest address
                byte[] tmp = new byte[2];
                System.arraycopy (h,   1, tmp, 0, 2);
                System.arraycopy (h,   3,   h, 1, 2);
                System.arraycopy (tmp, 0,   h, 3, 2);
            }
        }
        else
            h = header ;
        if (h != null) 
            serverOut.write(h);
    }
    /**
     * New QSP compatible signature (see QSP's ConfigChannel)
     * @param header String as seen by QSP
     */
    public void setHeader (String header) {
	super.setHeader (ISOUtil.str2bcd(header, false));
    }
}