tcpadv.java

jxta平台的开发包

/*
 * Copyright (c) 2001-2006 Sun Microsystems, Inc.  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
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * 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 SUN MICROSYSTEMS 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 Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: TCPAdv.java,v 1.38 2006/05/30 20:53:51 hamada Exp $
 */

package net.jxta.impl.protocol;


import java.util.Arrays;
import java.util.Enumeration;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

import net.jxta.document.Advertisement;
import net.jxta.document.AdvertisementFactory;
import net.jxta.document.Attributable;
import net.jxta.document.Attribute;
import net.jxta.document.Document;
import net.jxta.document.Element;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.XMLElement;
import net.jxta.protocol.TransportAdvertisement;


/**
 * Provides configuration parameters for the JXTA TCP Message Transport.
 */
public class TCPAdv extends TransportAdvertisement {

    /**
     *  Log4J Logger
     */
    private static final Logger LOG = Logger.getLogger(TCPAdv.class.getName());

    private static final String CONFIGMODES[] = { "auto", "manual" };
    private static final String INDEXFIELDS[] = {/* none */};

    private static final String PORT_ELEMENT = "Port";
    private static final String ClientOffTag = "ClientOff";
    private static final String ServerOffTag = "ServerOff";
    private static final String MULTICAST_OFF_TAG = "MulticastOff";
    private static final String FlagsTag = "Flags";
    private static final String PublicAddressOnlyAttr = "PublicAddressOnly";

    private String configMode = CONFIGMODES[0];
    private String interfaceAddress = null;
    private int startPort = -1;
    private int listenPort = -1;
    private int endPort = -1;
    private String publicAddress = null;
    private String multicastaddr = null;
    private int multicastport = -1;
    private int multicastsize = -1;
    private boolean clientEnabled = true;
    private boolean serverEnabled = true;
    private boolean multicastEnabled = true;
    private boolean publicAddressOnly = false;

    /**
     *  Our instantiator
     */
    public static class Instantiator implements AdvertisementFactory.Instantiator {

        /**
         * {@inheritDoc}
         */
        public String getAdvertisementType() {
            return TCPAdv.getAdvertisementType();
        }

        /**
         * {@inheritDoc}
         */
        public Advertisement newInstance() {
            return new TCPAdv();
        }

        /**
         * {@inheritDoc}
         */
        public Advertisement newInstance(net.jxta.document.Element root) {
            return new TCPAdv(root);
        }
    }

    /**
     *  Returns the identifying type of this Advertisement.
     *
     *  <p/><b>Note:</b> This is a static method. It cannot be used to determine
     *  the runtime type of an advertisment. ie.
     *  </p><code><pre>
     *      Advertisement adv = module.getSomeAdv();
     *      String advType = adv.getAdvertisementType();
     *  </pre></code>
     *
     *  <p/><b>This is wrong and does not work the way you might expect.</b>
     *  This call is not polymorphic and calls
     *  Advertiement.getAdvertisementType() no matter what the real type of the
     *  advertisment.
     *
     * @return String the type of advertisement
     */
    public static String getAdvertisementType() {
        return "jxta:TCPTransportAdvertisement";
    }

    /**
     *  called only by instantiator
     */
    private TCPAdv() {}

    /**
     *  called only by instantiator
     */
    private TCPAdv(Element root) {
        if (!XMLElement.class.isInstance(root)) {
            throw new IllegalArgumentException(getClass().getName() + " only supports XLMElement");
        }

        XMLElement doc = (XMLElement) root;

        String doctype = doc.getName();

        String typedoctype = "";
        Attribute itsType = doc.getAttribute("type");

        if (null != itsType) {
            typedoctype = itsType.getValue();
        }

        if (!doctype.equals(getAdvertisementType()) && !getAdvertisementType().equals(typedoctype)) {
            throw new IllegalArgumentException("Could not construct : " + getClass().getName() + "from doc containing a " + doc.getName());
        }

        Attribute attr = doc.getAttribute(FlagsTag);

        if (attr != null) {
            String options = attr.getValue();

            publicAddressOnly = (options.indexOf(PublicAddressOnlyAttr) != -1);
        }

        Enumeration elements = doc.getChildren();

        while (elements.hasMoreElements()) {
            XMLElement elem = (XMLElement) elements.nextElement();

            if (!handleElement(elem)) {
                if (LOG.isEnabledFor(Level.WARN)) {
                    LOG.warn("Unhandled Element: " + elem);
                }
            }
        }

        // Sanity Check!!!
        if (!Arrays.asList(CONFIGMODES).contains(configMode)) {
            throw new IllegalArgumentException("Unsupported configuration mode.");
        }

        if ((listenPort < -1) || (listenPort > 65535)) {
            throw new IllegalArgumentException("Illegal Listen Port Value");
        }

        if ((startPort < -1) || (startPort > 65535)) {
            throw new IllegalArgumentException("Illegal Start Port Value");
        }

        if ((endPort < -1) || (endPort > 65535)) {
            throw new IllegalArgumentException("Illegal End Port Value");
        }

        if ((0 == startPort) && (endPort != 0) || (0 != startPort) && (endPort == 0)) {
            throw new IllegalArgumentException("Port ranges must both be 0 or non-0");
        }

        if ((-1 == startPort) && (endPort != -1) || (-1 != startPort) && (endPort == -1)) {
            throw new IllegalArgumentException("Port ranges must both be -1 or not -1");
        }

        if ((null != publicAddress) && ((-1 != startPort) || (listenPort <= 0))) {
            throw new IllegalArgumentException("Dynamic ports not supported with public address port forwarding.");
        }

        if (getMulticastState() && (null == getMulticastAddr())) {
            throw new IllegalArgumentException("Multicast enabled and no address specified.");
        }

        if (getMulticastState() && (-1 == getMulticastPort())) {
            throw new IllegalArgumentException("Multicast enabled and no port specified.");
        }

        if (getMulticastState() && ((getMulticastPort() <= 0) || (getMulticastPort() > 65536))) {
            throw new IllegalArgumentException("Illegal Multicast Port Value");
        }

        if (getMulticastState() && (-1 == getMulticastSize())) {
            throw new IllegalArgumentException("Multicast enabled and no size specified.");
        }

        if (getMulticastState() && ((getMulticastSize() <= 0) || (getMulticastSize() > 1048575L))) {
            throw new IllegalArgumentException("Illegal Multicast datagram size");
        }

        // XXX 20050118 bondolo Some versions apparently don't initialize this field. Eventually make it required.
        if( null == getProtocol() ) {
            setProtocol( "tcp" );
        }
    }

    /**
     * {@inheritDoc}
     */
    public String getAdvType() {
        return getAdvertisementType();
    }

    /**
     * Returns the interface which the TCP transport will use.
     *
     * @return The interface to use. May be a DNS name or an IP Address.
     */
    public String getInterfaceAddress() {
        return interfaceAddress;
    }

    /**
     * Sets the interface which the TCP transport will use.
     *
     * @param ia The interface to use. May be a DNS name or an IP Address.
     */
    public void setInterfaceAddress(String ia) {
        if (null != ia) {
            ia = ia.trim();

            if (0 == ia.length()) {
                ia = null;
            }
        }

        this.interfaceAddress = ia;
    }

    /**
     * Returns the port on which the TCP Transport will listen if configured to
     * do so. If a port range is specified then this the preference. Valid
     * values are <code>-1</code>, <code>0</code> and <code>1-65535</code>.
     * The <code>-1</code> value is used to signify that there is no port
     * preference and any port in range will be used. The <code>0</code>
     * specifies that the Socket API dynamic port allocation should be used.
     * For values <code>1-65535</code> the value specifies the required port on
     * which the TCP tranport will listen.
     *
     * @return the port
     */
    public int getPort() {
        return listenPort;
    }

    /**
     * Sets the port on which the TCP Transport will listen if configured to
     * do so. If a port range is specified then this the preference. Valid
     * values are <code>-1</code>, <code>0</code> and <code>1-65535</code>.
     * The <code>-1</code> value is used to signify that there is no port
     * preference and any port in range will be used. The <code>0</code>
     * specifies that the Socket API dynamic port allocation should be used.
     * For values <code>1-65535</code> the value specifies the required port on
     * which the TCP tranport will listen.
     *
     * @param port the port on which to listen.
     */
    public void setPort(int port) {
        listenPort = port;
    }

    /**
     * Return the lowest port on which the TCP Transport will listen if
     * configured to do so. Valid values are <code>-1</code>, <code>0</code> and
     * <code>1-65535</code>. The <code>-1</code> value is used to signify that
     * the port range feature should be disabled. The <code>0</code> specifies
     * that the Socket API dynamic port allocation should be used. For values
     * <code>1-65535</code> the value must be equal to or less than the value
     * used for end port.
     *
     * @return the lowest port on which to listen.
     */
    public int getStartPort() {
        return startPort;
    }

    /**
     * Sets the lowest port on which the TCP Transport will listen if configured
     * to do so. Valid values are <code>-1</code>, <code>0</code> and
     * <code>1-65535</code>. The <code>-1</code> value is used to signify that
     * the port range feature should be disabled. The <code>0</code> specifies
     * that the Socket API dynamic port allocation should be used. For values
     * <code>1-65535</code> the value must be equal to or less than the value
     * used for end port.
     *
     * @param start the lowest port on which to listen.
     */
    public void setStartPort(int start) {
        startPort = start;
    }

    /**
     * Return the highest port on which the TCP Transport will listen if
     * configured to do so. Valid values are <code>-1</code>, <code>0</code> and
     * <code>1-65535</code>. The <code>-1</code> value is used to signify that
     * the port range feature should be disabled. The <code>0</code> specifies
     * that the Socket API dynamic port allocation should be used. For values
     * <code>1-65535</code> the value must be equal to or greater than the value
     * used for start port.
     *
     * @return the highest port on which to listen.
     */
    public int getEndPort() {
        return endPort;
    }

    /**
     * Sets the highest port on which the TCP Transport will listen if
     * configured to do so. Valid values are <code>-1</code>, <code>0</code> and
     * <code>1-65535</code>. The <code>-1</code> value is used to signify that
     * the port range feature should be disabled. The <code>0</code> specifies
     * that the Socket API dynamic port allocation should be used. For values
     * <code>1-65535</code> the value must be equal to or greater than the value
     * used for start port.
     *
     * @param end the highest port on which to listen.
     */
    public void setEndPort(int end) {
        endPort = end;
    }

    /**
     * Determine whether multicast if off or not
     *
     * @return boolean  current multicast state
     */
    public boolean getMulticastState() {
        return multicastEnabled;
    }

    /**
     * Enable or disable multicast.
     *
     * @param newState the desired state.
     */
    public void setMulticastState(boolean newState) {
        multicastEnabled = newState;
    }

    /**
     * returns the multicastaddr
     *
     * @return string multicastaddr
     */
    public String getMulticastAddr() {
        return multicastaddr;
    }