/* * 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.EOFException;import java.io.IOException;import java.net.ServerSocket;import java.net.SocketException;import org.jpos.iso.BaseChannel;import org.jpos.iso.ISOMsg;import org.jpos.iso.ISOPackager;/** * Implements an ISOChannel capable to exchange messages with * ACI's BASE24[tm] over an X.25 link. * * 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 * * @version $Id: BASE24Channel.java,v 1.10 2003/10/13 10:34:15 apr Exp $ * * @see ISOMsg * @see ISOException * @see ISOChannel */public class BASE24Channel extends BaseChannel {    /**     * Public constructor (used by Class.forName("...").newInstance())     */    public BASE24Channel () {        super();    }    /**     * Construct client ISOChannel     * @param host  server TCP Address     * @param port  server port number     * @param p     an ISOPackager     * @see ISOPackager     */    public BASE24Channel (String host, int port, ISOPackager p) {        super(host, port, p);    }    /**     * Construct server ISOChannel     * @param p     an ISOPackager     * @see ISOPackager     * @exception IOException     */    public BASE24Channel (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 BASE24Channel (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);    }    /**     * @return a byte array with the received message     * @exception IOException     */    protected byte[] streamReceive() throws IOException {        int i;        byte[] buf = new byte[4096];        for (i=0; i<4096; i++) {            int c = -1;            try {                c = serverIn.read();            } catch (SocketException e) { }            if (c == 03)                break;            else if (c == -1)                throw new EOFException("connection closed");            buf[i] = (byte) c;        }        if (i == 4096)            throw new IOException("packet too long");        byte[] d = new byte[i];        System.arraycopy(buf, 0, d, 0, i);        return d;    }}