/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* 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 Sun Microsystems, Inc. for JXTA(TM) technology."
* 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.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* <http://www.jxta.org/project/www/license.html> for instructions on use of
* the license in source files.
*
* ====================================================================
*
* 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.
*/
package net.jxta.impl.protocol;
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.logging.Logging;
import net.jxta.protocol.TransportAdvertisement;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Provides configuration parameters for the JXTA TCP Message Transport.
*/
public class TCPAdv extends TransportAdvertisement {
/**
* 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 MCAST_THREAD_POOL = "Mcast_Pool_Size";
private static final String ClientOffTag = "ClientOff";
private static final String ServerOffTag = "ServerOff";
private static final String MULTICAST_OFF_TAG = "MulticastOff";
private static final String MULTICAST_INTERFACE_TAG = "MulticastInterface";
private static final String MULTICAST_ADDRESS_TAG = "MulticastAddr";
private static final String MULTICAST_PORT_TAG = "MulticastPort";
private static final String FlagsTag = "Flags";
private static final String PublicAddressOnlyAttr = "PublicAddressOnly";
private String configMode = CONFIGMODES[0];
private String interfaceAddress = null;
private String mcastInterface = 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 poolSize = 5;
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) {
if (!XMLElement.class.isInstance(root)) {
throw new IllegalArgumentException(getClass().getName() + " only supports XLMElement");
}
return new TCPAdv((XMLElement) 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 advertisement. 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
* Advertisement.getAdvertisementType() no matter what the real type of the
* advertisement.
*
* @return String the type of advertisement
*/
public static String getAdvertisementType() {
return "jxta:TCPTransportAdvertisement";
}
private TCPAdv() {
setProtocol("tcp");
}
private TCPAdv(XMLElement doc) {
this();
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 (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.warning("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}
*/
@Override
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 interfaceAddress The interface to use. May be a DNS name or an IP Address.
*/
public void setInterfaceAddress(String interfaceAddress) {
if (null != interfaceAddress) {
interfaceAddress = interfaceAddress.trim();
if (0 == interfaceAddress.length()) {
interfaceAddress = null;
}
}
this.interfaceAddress = interfaceAddress;
}
/**
* 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 transport 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 transport 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 startPort the lowest port on which to listen.
*/
public void setStartPort(int startPort) {
this.startPort = startPort;
}
/**
* 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 endPort the highest port on which to listen.
*/
public void setEndPort(int endPort) {
this.endPort = endPort;
}
/**
* Determine whether multicast if off or not
*
* @return boolean current multicast state
*/
public boolean getMulticastState() {
return multicastEnabled;
}
/**
* Enable or disable multicast.
*
* @param multicastState the desired state.
*/
public void setMulticastState(boolean multicastState) {
multicastEnabled = multicastState;
}
/**
* returns the multicastaddr
*
* @return string multicastaddr
*/
public String getMulticastAddr() {
return multicastaddr;
}
/**
* set the multicastaddr
*
* @param multicastaddr set multicastaddr
*/
public void setMulticastAddr(String multicastaddr) {
if (null != multicastaddr) {
multicastaddr = multicastaddr.trim();
if (0 == multicastaddr.length()) {
multicastaddr = null;
}
}
this.multicastaddr = multicastaddr;
}
/**
* set the multicast interface
*
* @param multicastInterface set multicastaddr
*/
public void setMulticastInterface(String multicastInterface) {
if (null != multicastInterface) {
multicastInterface = multicastInterface.trim();
if (0 == multicastInterface.length()) {
this.mcastInterface = null;
}
}
this.mcastInterface = multicastInterface;
}
/**
* Returns the multicast interface
* @return the multicast interface, null if none specified, in which case it default to the tcp interface address
*
*/
public String getMulticastInterface() {
return mcastInterface;
}
/**
* returns the multicastport
*
* @return int multicastport
*/
public int getMulticastPort() {
return multicastport;
}
/**
* returns the multicast pool size
*
* @return the multicast pool size
*/
public int getMulticastPoolSize() {
return poolSize;
}
/**
* set the multicastport
*
* @param multicastport set multicastport
*/
public void setMulticastPort(int multicastport) {
this.multicastport = multicastport;
}
/**
* set the multicast thread pool size
*
* @param size thread pool size
*/
public void setMulticastPoolSize(int size) {
this.poolSize = poolSize;
}
/**
* returns the multicastsize
*
* @return integer containting the multicast size
*/
public int getMulticastSize() {
return multicastsize;
}
/**
* set the multicastsize
*
* @param multicastsize set multicast size
*/
public void setMulticastSize(int multicastsize) {
this.multicastsize = multicastsize;
}
/**
* Returns the public address
*
* @return string public address
*/
public String getServer() {
return publicAddress;
}
/**
* Set the public address. That is, a the address of a server socket
* to connect to from the outside. Argument is in the form host:port
*
* @param address address
*/
public void setServer(String address) {
if (null != address) {
address = address.trim();
if (0 == address.length()) {
address = null;
}
}
this.publicAddress = address;
}
/**
* Returns the configuration for outbound connections.
*
* @return <code>true</code> if outbound connections are allowed otherwise
* <code>false</code>
*/
public boolean isClientEnabled() {
return clientEnabled;
}
/**
* Sets the configuration for outbound connections.
*
* @param enabled <code>true</code> if outbound connections are allowed otherwise
* <code>false</code>
*/
public void setClientEnabled(boolean enabled) {
clientEnabled = enabled;
}
/**
* Returns the configuration for outbound connections.
*
* @return enabled <code>true</code> if outbound connections are allowed otherwise
* <code>false</code>
*/
public boolean getClientEnabled() {
return clientEnabled;
}
/**
* Returns the configuration for inbound connections.
*
* @return <code>true</code> if inbound connections are allowed otherwise
* <code>false</code>
*/
public boolean isServerEnabled() {
return serverEnabled;
}
/**
* Sets the configuration for inbound connections.
*
* @param enabled <code>true</code> if inbound connections are allowed otherwise
* <code>false</code>
*/
public void setServerEnabled(boolean enabled) {
serverEnabled = enabled;
}
/**
* returns the config mode. That is, how the user prefers to configure
* the interface address: "auto", "manual"
*
* @return string config mode
*/
public String getConfigMode() {
return configMode;
}
/**
* set the config mode. That is, how the user prefers to configure
* the interface address: "auto", "manual"
*
* This is just a pure config item. It is never in published advs. The TCP
* transport strips it when it initializes.
*
* @param mode Can be "auto", "manual" other settings will act as the default
* which is "auto".
*/
public void setConfigMode(String mode) {
if (!Arrays.asList(CONFIGMODES).contains(mode)) {
throw new IllegalArgumentException("Unsupported configuration mode.");
}
configMode = mode;
}
/**
* Returns the state of whether to only use public address
*
* @return boolean true if set to use "Public Address Only"
*/
public boolean getPublicAddressOnly() {
return publicAddressOnly;
}
/**
* Sets the state of whether to only use public address
*
* @param only true to use "Public Address Only"
*/
public void setPublicAddressOnly(boolean only) {
publicAddressOnly = only;
}
/**
* {@inheritDoc}
*/
@Override
protected boolean handleElement(Element raw) {
if (super.handleElement(raw)) {
return true;
}
XMLElement elem = (XMLElement) raw;
if (elem.getName().equals(MULTICAST_OFF_TAG)) {
setMulticastState(false);
return true;
}
if (elem.getName().equals(ClientOffTag)) {
setClientEnabled(false);
return true;
}
if (elem.getName().equals(ServerOffTag)) {
setServerEnabled(false);
return true;
}
String value = elem.getTextValue();
if ((null == value) || (0 == value.trim().length())) {
return false;
}
value = value.trim();
if (elem.getName().equals("Protocol")) {
setProtocol(value);
return true;
}
if (PORT_ELEMENT.equals(elem.getName())) {
try {
setPort(Integer.parseInt(value));
Attribute startAttr = elem.getAttribute("start");
Attribute endAttr = elem.getAttribute("end");
if ((null != startAttr) && (null != endAttr)) {
setStartPort(Integer.parseInt(startAttr.getValue().trim()));
setEndPort(Integer.parseInt(endAttr.getValue().trim()));
}
} catch (NumberFormatException badPort) {
throw new IllegalArgumentException("Illegal port value : " + value);
}
return true;
}
if (elem.getName().equals(MULTICAST_ADDRESS_TAG)) {
setMulticastAddr(value);
return true;
}
if (elem.getName().equals(MULTICAST_INTERFACE_TAG)) {
this.setMulticastInterface(value);
return true;
}
if (elem.getName().equals(MULTICAST_PORT_TAG)) {
try {
setMulticastPort(Integer.parseInt(value));
} catch (NumberFormatException badPort) {
throw new IllegalArgumentException("Illegal multicast port value : " + value);
}
return true;
}
if (elem.getName().equals(MCAST_THREAD_POOL)) {
try {
setMulticastPoolSize(Integer.parseInt(value));
} catch (NumberFormatException badPort) {
throw new IllegalArgumentException("Illegal multicast port value : " + value);
}
return true;
}
if (elem.getName().equals("MulticastSize")) {
try {
int theMulticastSize = Integer.parseInt(value);
setMulticastSize(theMulticastSize);
} catch (NumberFormatException badPort) {
throw new IllegalArgumentException("Illegal multicast datagram size : " + value);
}
return true;
}
if (elem.getName().equals("Server")) {
setServer(value);
return true;
}
if (elem.getName().equals("InterfaceAddress")) {
setInterfaceAddress(value);
return true;
}
if (elem.getName().equals("ConfigMode")) {
setConfigMode(value);
return true;
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public Document getDocument(MimeMediaType encodeAs) {
StructuredDocument adv = (StructuredDocument) super.getDocument(encodeAs);
if (!(adv instanceof Attributable)) {
throw new IllegalStateException("Only Attributable document types allowed.");
}
// XXX 20050118 bondolo Some versions apparently don't initialize this field. Eventually make it required.
if (null == getProtocol()) {
setProtocol("tcp");
}
if ((listenPort < -1) || (listenPort > 65535)) {
throw new IllegalStateException("Illegal Listen Port Value");
}
if ((startPort < -1) || (startPort > 65535)) {
throw new IllegalStateException("Illegal Start Port Value");
}
if ((endPort < -1) || (endPort > 65535)) {
throw new IllegalStateException("Illegal End Port Value");
}
if ((0 == startPort) && (endPort != 0) || (0 != startPort) && (endPort == 0)) {
throw new IllegalStateException("Port ranges must both be 0 or non-0");
}
if ((-1 == startPort) && (endPort != -1) || (-1 != startPort) && (endPort == -1)) {
throw new IllegalStateException("Port ranges must both be -1 or not -1");
}
if ((null != publicAddress) && ((-1 != startPort) || (listenPort <= 0))) {
throw new IllegalStateException("Dynamic ports not supported with public address port forwarding.");
}
if (getMulticastState() && (null == getMulticastAddr())) {
throw new IllegalStateException("Multicast enabled and no address specified.");
}
if (getMulticastState() && (-1 == getMulticastPort())) {
throw new IllegalStateException("Multicast enabled and no port specified.");
}
if (getMulticastState() && ((getMulticastPort() <= 0) || (getMulticastPort() > 65536))) {
throw new IllegalStateException("Illegal Multicast Port Value");
}
if (getMulticastState() && (-1 == getMulticastSize())) {
throw new IllegalStateException("Multicast enabled and no size specified.");
}
if (getMulticastState() && ((getMulticastSize() <= 0) || (getMulticastSize() > 1048575L))) {
throw new IllegalStateException("Illegal Multicast datagram size");
}
if (adv instanceof Attributable) {
// Only one flag for now. Easy.
if (publicAddressOnly) {
((Attributable) adv).addAttribute(FlagsTag, PublicAddressOnlyAttr);
}
}
Element proto = adv.createElement("Protocol", getProtocol());
adv.appendChild(proto);
if (!isClientEnabled()) {
Element clientEnabled = adv.createElement(ClientOffTag);
adv.appendChild(clientEnabled);
}
if (!isServerEnabled()) {
Element serverOff = adv.createElement(ServerOffTag);
adv.appendChild(serverOff);
}
if (getConfigMode() != null) {
Element configMode = adv.createElement("ConfigMode", getConfigMode());
adv.appendChild(configMode);
}
String interfaceAddr = getInterfaceAddress();
if (null != interfaceAddr) {
Element interfaceAddrr = adv.createElement("InterfaceAddress", interfaceAddr);
adv.appendChild(interfaceAddrr);
}
Element portEl = adv.createElement(PORT_ELEMENT, Integer.toString(listenPort));
adv.appendChild(portEl);
if (adv instanceof Attributable) {
Attributable attrElem = (Attributable) portEl;
if ((-1 != startPort) && (-1 != endPort)) {
attrElem.addAttribute("start", Integer.toString(startPort));
attrElem.addAttribute("end", Integer.toString(endPort));
}
}
String serverAddr = getServer();
if (null != serverAddr) {
Element server = adv.createElement("Server", serverAddr);
adv.appendChild(server);
}
if (!getMulticastState()) {
Element mOff = adv.createElement(MULTICAST_OFF_TAG);
adv.appendChild(mOff);
}
if (null != getMulticastAddr()) {
Element mAddrr = adv.createElement(MULTICAST_ADDRESS_TAG, getMulticastAddr());
adv.appendChild(mAddrr);
}
if (null != this.getMulticastInterface()) {
Element mInterace = adv.createElement(MULTICAST_INTERFACE_TAG, getMulticastInterface());
adv.appendChild(mInterace);
}
if (-1 != getMulticastPort()) {
Element mPort = adv.createElement(MULTICAST_PORT_TAG, Integer.toString(getMulticastPort()));
adv.appendChild(mPort);
}
if (-1 != getMulticastPoolSize()) {
Element poolEl = adv.createElement(MCAST_THREAD_POOL, Integer.toString(getMulticastPoolSize()));
adv.appendChild(poolEl);
}
if (-1 != getMulticastSize()) {
Element mSize = adv.createElement("MulticastSize", Integer.toString(getMulticastSize()));
adv.appendChild(mSize);
}
return adv;
}
/**
* {@inheritDoc}
*/
@Override
public String[] getIndexFields() {
return INDEXFIELDS;
}
/**
* Gets the configuration for inbound connections.
*
* @return true if inbound connections are allowed, returns false otherwise
* @see #setServerEnabled
*/
public boolean getServerEnabled() {
return serverEnabled;
}
}