/** * $RCSfile$ * $Revision$ * $Date$ * * Copyright 2003-2004 Jive Software. * * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.jivesoftware.smack; import org.jivesoftware.smack.debugger.SmackDebugger; import org.jivesoftware.smack.filter.PacketFilter; import org.jivesoftware.smack.filter.PacketTypeFilter; import org.jivesoftware.smack.packet.Message; import org.jivesoftware.smack.packet.Packet; import org.jivesoftware.smack.packet.Presence; import org.jivesoftware.smack.packet.XMPPError; import org.jivesoftware.smack.util.StringUtils; import javax.net.SocketFactory; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import java.io.*; import java.lang.ref.WeakReference; import java.lang.reflect.Constructor; import java.net.Socket; import java.net.UnknownHostException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Creates a connection to a XMPP server. A simple use of this API might * look like the following: *
 * // Create a connection to the jivesoftware.com XMPP server.
 * XMPPConnection con = new XMPPConnection("jivesoftware.com");
 * // Most servers require you to login before performing other tasks.
 * con.login("jsmith", "mypass");
 * // Start a new conversation with John Doe and send him a message.
 * Chat chat = con.createChat("jdoe@jabber.org");
 * chat.sendMessage("Hey, how's it going?");
 * 
* * @author Matt Tucker */ public class XMPPConnection { /** * Value that indicates whether debugging is enabled. When enabled, a debug * window will apear for each new connection that will contain the following * information: * * Debugging can be enabled by setting this field to true, or by setting the Java system * property smack.debugEnabled to true. The system property can be set on the * command line such as "java SomeApp -Dsmack.debugEnabled=true". */ public static boolean DEBUG_ENABLED = false; private static List connectionEstablishedListeners = new ArrayList(); static { // Use try block since we may not have permission to get a system // property (for example, when an applet). try { DEBUG_ENABLED = Boolean.getBoolean("smack.debugEnabled"); } catch (Exception e) { // Ignore. } // Ensure the SmackConfiguration class is loaded by calling a method in it. SmackConfiguration.getVersion(); } private SmackDebugger debugger = null; /** * IP address or host name of the server. This information is only used when * creating new socket connections to the server. If this information is not * configured then it will be assumed that the host name matches the service name. */ String host; int port; Socket socket; /** * Hostname of the XMPP server. Usually servers use the same service name as the name * of the server. However, there are some servers like google where host would be * talk.google.com and the serviceName would be gmail.com. */ String serviceName; String connectionID; private String user = null; private boolean connected = false; private boolean authenticated = false; private boolean anonymous = false; private boolean usingTLS = false; PacketWriter packetWriter; PacketReader packetReader; Roster roster = null; private AccountManager accountManager = null; private SASLAuthentication saslAuthentication = new SASLAuthentication(this); Writer writer; Reader reader; /** * A map between JIDs and the most recently created Chat object with that JID. * Reference to the Chat is stored via a WeakReference so that the map * does not interfere with garbage collection. The map of chats must be stored * with each connection. */ Map chats = new HashMap(); /** * Creates a new connection to the specified XMPP server. The default port of 5222 will * be used. The IP address of the server is assumed to match the service name. * * @param serviceName the name of the XMPP server to connect to; e.g. jivesoftware.com. * @throws XMPPException if an error occurs while trying to establish the connection. * Two possible errors can occur which will be wrapped by an XMPPException -- * UnknownHostException (XMPP error code 504), and IOException (XMPP error code * 502). The error codes and wrapped exceptions can be used to present more * appropiate error messages to end-users. */ public XMPPConnection(String serviceName) throws XMPPException { this(serviceName, 5222, serviceName); } /** * Creates a new connection to the specified XMPP server on the given port. The IP address * of the server is assumed to match the service name. * * @param host the name of the XMPP server to connect to; e.g. jivesoftware.com. * @param port the port on the server that should be used; e.g. 5222. * @throws XMPPException if an error occurs while trying to establish the connection. * Two possible errors can occur which will be wrapped by an XMPPException -- * UnknownHostException (XMPP error code 504), and IOException (XMPP error code * 502). The error codes and wrapped exceptions can be used to present more * appropiate error messages to end-users. */ public XMPPConnection(String host, int port) throws XMPPException { this(host, port, host); } /** * Creates a new connection to the specified XMPP server on the given host and port. * * @param host the host name, or null for the loopback address. * @param port the port on the server that should be used; e.g. 5222. * @param serviceName the name of the XMPP server to connect to; e.g. jivesoftware.com. * @throws XMPPException if an error occurs while trying to establish the connection. * Two possible errors can occur which will be wrapped by an XMPPException -- * UnknownHostException (XMPP error code 504), and IOException (XMPP error code * 502). The error codes and wrapped exceptions can be used to present more * appropiate error messages to end-users. */ public XMPPConnection(String host, int port, String serviceName) throws XMPPException { this.host = host; this.port = port; try { this.socket = new Socket(host, port); } catch (UnknownHostException uhe) { throw new XMPPException( "Could not connect to " + host + ":" + port + ".", new XMPPError(504), uhe); } catch (IOException ioe) { throw new XMPPException( "XMPPError connecting to " + host + ":" + port + ".", new XMPPError(502), ioe); } this.serviceName = serviceName; init(); } /** * Creates a new connection to the specified XMPP server on the given port using the * specified SocketFactory.

* * A custom SocketFactory allows fine-grained control of the actual connection to the * XMPP server. A typical use for a custom SocketFactory is when connecting through a * SOCKS proxy. * * @param host the host name, or null for the loopback address. * @param port the port on the server that should be used; e.g. 5222. * @param serviceName the name of the XMPP server to connect to; e.g. jivesoftware.com. * @param socketFactory a SocketFactory that will be used to create the socket to the XMPP * server. * @throws XMPPException if an error occurs while trying to establish the connection. * Two possible errors can occur which will be wrapped by an XMPPException -- * UnknownHostException (XMPP error code 504), and IOException (XMPP error code * 502). The error codes and wrapped exceptions can be used to present more * appropiate error messages to end-users. */ public XMPPConnection(String host, int port, String serviceName, SocketFactory socketFactory) throws XMPPException { this.host = host; this.port = port; try { this.socket = socketFactory.createSocket(host, port); } catch (UnknownHostException uhe) { throw new XMPPException( "Could not connect to " + host + ":" + port + ".", new XMPPError(504), uhe); } catch (IOException ioe) { throw new XMPPException( "XMPPError connecting to " + host + ":" + port + ".", new XMPPError(502), ioe); } this.serviceName = serviceName; init(); } /** * Package-private default constructor. This constructor is only intended * for unit testing. Normal classes extending XMPPConnection should override * one of the other constructors. */ XMPPConnection() { } /** * Returns the connection ID for this connection, which is the value set by the server * when opening a XMPP stream. If the server does not set a connection ID, this value * will be null. * * @return the ID of this connection returned from the XMPP server. */ public String getConnectionID() { return connectionID; } /** * Returns the name of the service provided by the XMPP server for this connection. After * authenticating with the server the returned value may be different. * * @return the name of the service provided by the XMPP server. */ public String getServiceName() { return serviceName; } /** * Returns the host name of the server where the XMPP server is running. This would be the * IP address of the server or a name that may be resolved by a DNS server. * * @return the host name of the server where the XMPP server is running. */ public String getHost() { return host; } /** * Returns the port number of the XMPP server for this connection. The default port * for normal connections is 5222. The default port for SSL connections is 5223. * * @return the port number of the XMPP server. */ public int getPort() { return port; } /** * Returns the full XMPP address of the user that is logged in to the connection or * null if not logged in yet. An XMPP address is in the form * username@server/resource. * * @return the full XMPP address of the user logged in. */ public String getUser() { if (!isAuthenticated()) { return null; } return user; } /** * Logs in to the server using the strongest authentication mode supported by * the server, then set our presence to available. If more than five seconds * (default timeout) elapses in each step of the authentication process without * a response from the server, or if an error occurs, a XMPPException will be thrown. * * @param username the username. * @param password the password. * @throws XMPPException if an error occurs. */ public void login(String username, String password) throws XMPPException { login(username, password, "Smack"); } /** * Logs in to the server using the strongest authentication mode supported by * the server, then sets presence to available. If more than five seconds * (default timeout) elapses in each step of the authentication process without * a response from the server, or if an error occurs, a XMPPException will be thrown. * * @param username the username. * @param password the password. * @param resource the resource. * @throws XMPPException if an error occurs. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void login(String username, String password, String resource) throws XMPPException { login(username, password, resource, true); } /** * Logs in to the server using the strongest authentication mode supported by * the server. If the server supports SASL authentication then the user will be * authenticated using SASL if not Non-SASL authentication will be tried. An available * presence may optionally be sent. If sendPresence * is false, a presence packet must be sent manually later. If more than five seconds * (default timeout) elapses in each step of the authentication process without a * response from the server, or if an error occurs, a XMPPException will be thrown. * * @param username the username. * @param password the password. * @param resource the resource. * @param sendPresence if true an available presence will be sent automatically * after login is completed. * @throws XMPPException if an error occurs. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void login(String username, String password, String resource, boolean sendPresence) throws XMPPException { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (authenticated) { throw new IllegalStateException("Already logged in to server."); } // Do partial version of nameprep on the username. username = username.toLowerCase().trim(); String response = null; if (saslAuthentication.hasNonAnonymousAuthentication()) { // Authenticate using SASL response = saslAuthentication.authenticate(username, password, resource); } else { // Authenticate using Non-SASL response = new NonSASLAuthentication(this).authenticate(username, password, resource); } // Set the user. if (response != null) { this.user = response; // Update the serviceName with the one returned by the server this.serviceName = StringUtils.parseServer(response); } else { this.user = username + "@" + this.serviceName; if (resource != null) { this.user += "/" + resource; } } // Create the roster. this.roster = new Roster(this); roster.reload(); // Set presence to online. if (sendPresence) { packetWriter.sendPacket(new Presence(Presence.Type.AVAILABLE)); } // Indicate that we're now authenticated. authenticated = true; anonymous = false; // If debugging is enabled, change the the debug window title to include the // name we are now logged-in as. // If DEBUG_ENABLED was set to true AFTER the connection was created the debugger // will be null if (DEBUG_ENABLED && debugger != null) { debugger.userHasLogged(user); } } /** * Logs in to the server anonymously. Very few servers are configured to support anonymous * authentication, so it's fairly likely logging in anonymously will fail. If anonymous login * does succeed, your XMPP address will likely be in the form "server/123ABC" (where "123ABC" * is a random value generated by the server). * * @throws XMPPException if an error occurs or anonymous logins are not supported by the server. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void loginAnonymously() throws XMPPException { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (authenticated) { throw new IllegalStateException("Already logged in to server."); } String response = null; if (saslAuthentication.hasAnonymousAuthentication()) { response = saslAuthentication.authenticateAnonymously(); } else { // Authenticate using Non-SASL response = new NonSASLAuthentication(this).authenticateAnonymously(); } // Set the user value. this.user = response; // Update the serviceName with the one returned by the server this.serviceName = StringUtils.parseServer(response); // Anonymous users can't have a roster. roster = null; // Set presence to online. packetWriter.sendPacket(new Presence(Presence.Type.AVAILABLE)); // Indicate that we're now authenticated. authenticated = true; anonymous = true; // If debugging is enabled, change the the debug window title to include the // name we are now logged-in as. // If DEBUG_ENABLED was set to true AFTER the connection was created the debugger // will be null if (DEBUG_ENABLED && debugger != null) { debugger.userHasLogged(user); } } /** * Returns the roster for the user logged into the server. If the user has not yet * logged into the server (or if the user is logged in anonymously), this method will return * null. * * @return the user's roster, or null if the user has not logged in yet. */ public Roster getRoster() { if (roster == null) { return null; } // If this is the first time the user has asked for the roster after calling // login, we want to wait for the server to send back the user's roster. This // behavior shields API users from having to worry about the fact that roster // operations are asynchronous, although they'll still have to listen for // changes to the roster. Note: because of this waiting logic, internal // Smack code should be wary about calling the getRoster method, and may need to // access the roster object directly. if (!roster.rosterInitialized) { try { synchronized (roster) { long waitTime = SmackConfiguration.getPacketReplyTimeout(); long start = System.currentTimeMillis(); while (!roster.rosterInitialized) { if (waitTime <= 0) { break; } roster.wait(waitTime); long now = System.currentTimeMillis(); waitTime -= now - start; start = now; } } } catch (InterruptedException ie) { // Ignore. } } return roster; } /** * Returns an account manager instance for this connection. * * @return an account manager for this connection. */ public synchronized AccountManager getAccountManager() { if (accountManager == null) { accountManager = new AccountManager(this); } return accountManager; } /** * Creates a new chat with the specified participant. The participant should * be a valid XMPP user such as jdoe@jivesoftware.com or * jdoe@jivesoftware.com/work. * * @param participant the person to start the conversation with. * @return a new Chat object. */ public Chat createChat(String participant) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } return new Chat(this, participant); } /** * Creates a new group chat connected to the specified room. The room name * should be full address, such as room@chat.example.com. *

* Most XMPP servers use a sub-domain for the chat service (eg chat.example.com * for the XMPP server example.com). You must ensure that the room address you're * trying to connect to includes the proper chat sub-domain. * * @param room the fully qualifed name of the room. * @return a new GroupChat object. */ public GroupChat createGroupChat(String room) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } return new GroupChat(this, room); } /** * Returns true if currently connected to the XMPP server. * * @return true if connected. */ public boolean isConnected() { return connected; } /** * Returns true if the connection is a secured one, such as an SSL connection or * if TLS was negotiated successfully. * * @return true if a secure connection to the server. */ public boolean isSecureConnection() { return isUsingTLS(); } /** * Returns true if currently authenticated by successfully calling the login method. * * @return true if authenticated. */ public boolean isAuthenticated() { return authenticated; } /** * Returns true if currently authenticated anonymously. * * @return true if authenticated anonymously. */ public boolean isAnonymous() { return anonymous; } /** * Closes the connection by setting presence to unavailable then closing the stream to * the XMPP server. Once a connection has been closed, it cannot be re-opened. */ public void close() { // Set presence to offline. packetWriter.sendPacket(new Presence(Presence.Type.UNAVAILABLE)); packetReader.shutdown(); packetWriter.shutdown(); // Wait 150 ms for processes to clean-up, then shutdown. try { Thread.sleep(150); } catch (Exception e) { // Ignore. } // Close down the readers and writers. if (reader != null) { try { reader.close(); } catch (Throwable ignore) { /* ignore */ } reader = null; } if (writer != null) { try { writer.close(); } catch (Throwable ignore) { /* ignore */ } writer = null; } try { socket.close(); } catch (Exception e) { // Ignore. } authenticated = false; connected = false; } /** * Sends the specified packet to the server. * * @param packet the packet to send. */ public void sendPacket(Packet packet) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (packet == null) { throw new NullPointerException("Packet is null."); } packetWriter.sendPacket(packet); } /** * Registers a packet listener with this connection. A packet filter determines * which packets will be delivered to the listener. * * @param packetListener the packet listener to notify of new packets. * @param packetFilter the packet filter to use. */ public void addPacketListener(PacketListener packetListener, PacketFilter packetFilter) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } packetReader.addPacketListener(packetListener, packetFilter); } /** * Removes a packet listener from this connection. * * @param packetListener the packet listener to remove. */ public void removePacketListener(PacketListener packetListener) { packetReader.removePacketListener(packetListener); } /** * Registers a packet listener with this connection. The listener will be * notified of every packet that this connection sends. A packet filter determines * which packets will be delivered to the listener. * * @param packetListener the packet listener to notify of sent packets. * @param packetFilter the packet filter to use. */ public void addPacketWriterListener(PacketListener packetListener, PacketFilter packetFilter) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } packetWriter.addPacketListener(packetListener, packetFilter); } /** * Removes a packet listener from this connection. * * @param packetListener the packet listener to remove. */ public void removePacketWriterListener(PacketListener packetListener) { packetWriter.removePacketListener(packetListener); } /** * Creates a new packet collector for this connection. A packet filter determines * which packets will be accumulated by the collector. * * @param packetFilter the packet filter to use. * @return a new packet collector. */ public PacketCollector createPacketCollector(PacketFilter packetFilter) { return packetReader.createPacketCollector(packetFilter); } /** * Adds a connection listener to this connection that will be notified when * the connection closes or fails. * * @param connectionListener a connection listener. */ public void addConnectionListener(ConnectionListener connectionListener) { if (connectionListener == null) { return; } synchronized (packetReader.connectionListeners) { if (!packetReader.connectionListeners.contains(connectionListener)) { packetReader.connectionListeners.add(connectionListener); } } } /** * Removes a connection listener from this connection. * * @param connectionListener a connection listener. */ public void removeConnectionListener(ConnectionListener connectionListener) { synchronized (packetReader.connectionListeners) { packetReader.connectionListeners.remove(connectionListener); } } /** * Adds a connection established listener that will be notified when a new connection * is established. * * @param connectionEstablishedListener a listener interested on connection established events. */ public static void addConnectionListener(ConnectionEstablishedListener connectionEstablishedListener) { synchronized (connectionEstablishedListeners) { if (!connectionEstablishedListeners.contains(connectionEstablishedListener)) { connectionEstablishedListeners.add(connectionEstablishedListener); } } } /** * Removes a listener on new established connections. * * @param connectionEstablishedListener a listener interested on connection established events. */ public static void removeConnectionListener(ConnectionEstablishedListener connectionEstablishedListener) { synchronized (connectionEstablishedListeners) { connectionEstablishedListeners.remove(connectionEstablishedListener); } } /** * Initializes the connection by creating a packet reader and writer and opening a * XMPP stream to the server. * * @throws XMPPException if establishing a connection to the server fails. */ private void init() throws XMPPException { // Set the reader and writer instance variables initReaderAndWriter(); try { packetWriter = new PacketWriter(this); packetReader = new PacketReader(this); // If debugging is enabled, we should start the thread that will listen for // all packets and then log them. if (DEBUG_ENABLED) { packetReader.addPacketListener(debugger.getReaderListener(), null); if (debugger.getWriterListener() != null) { packetWriter.addPacketListener(debugger.getWriterListener(), null); } } // Start the packet writer. This will open a XMPP stream to the server packetWriter.startup(); // Start the packet reader. The startup() method will block until we // get an opening stream packet back from server. packetReader.startup(); // Make note of the fact that we're now connected. connected = true; // Notify that a new connection has been established connectionEstablished(this); // Add a listener for all message packets so that we can deliver errant // messages to the best Chat instance available. addPacketListener(new PacketListener() { public void processPacket(Packet packet) { Message message = (Message)packet; // Ignore any messages with a thread ID, as they will likely // already be associated with a Chat. This will miss messages // with new thread ID values, but we can only assume that a // listener is registered to deal with this case. if (message.getThread() == null) { WeakReference chatRef = (WeakReference)chats.get( StringUtils.parseBareAddress(message.getFrom())); if (chatRef != null) { // Do some extra clean-up if the reference was cleared. Chat chat; if ((chat = (Chat)chatRef.get()) == null) { chats.remove(message.getFrom()); } else { chat.deliver(message); } } } } }, new PacketTypeFilter(Message.class)); } catch (XMPPException ex) { // An exception occurred in setting up the connection. Make sure we shut down the // readers and writers and close the socket. if (packetWriter != null) { try { packetWriter.shutdown(); } catch (Throwable ignore) { /* ignore */ } packetWriter = null; } if (packetReader != null) { try { packetReader.shutdown(); } catch (Throwable ignore) { /* ignore */ } packetReader = null; } if (reader != null) { try { reader.close(); } catch (Throwable ignore) { /* ignore */ } reader = null; } if (writer != null) { try { writer.close(); } catch (Throwable ignore) { /* ignore */} writer = null; } if (socket != null) { try { socket.close(); } catch (Exception e) { /* ignore */ } socket = null; } authenticated = false; connected = false; throw ex; // Everything stoppped. Now throw the exception. } } private void initReaderAndWriter() throws XMPPException { try { reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8")); writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF-8")); } catch (IOException ioe) { throw new XMPPException( "XMPPError establishing connection with server.", new XMPPError(502), ioe); } // If debugging is enabled, we open a window and write out all network traffic. if (DEBUG_ENABLED) { if (debugger == null) { // Detect the debugger class to use. String className = null; // Use try block since we may not have permission to get a system // property (for example, when an applet). try { className = System.getProperty("smack.debuggerClass"); } catch (Throwable t) { } Class debuggerClass = null; if (className != null) { try { debuggerClass = Class.forName(className); } catch (Exception e) { e.printStackTrace(); } } if (debuggerClass == null) { try { debuggerClass = Class.forName("org.jivesoftware.smackx.debugger.EnhancedDebugger"); } catch (Exception ex) { try { debuggerClass = Class.forName("org.jivesoftware.smack.debugger.LiteDebugger"); } catch (Exception ex2) { ex2.printStackTrace(); } } } // Create a new debugger instance. If an exception occurs then disable the debugging // option try { Constructor constructor = debuggerClass.getConstructor( new Class[] { XMPPConnection.class, Writer.class, Reader.class }); debugger = (SmackDebugger) constructor .newInstance(new Object[]{this, writer, reader}); reader = debugger.getReader(); writer = debugger.getWriter(); } catch (Exception e) { e.printStackTrace(); DEBUG_ENABLED = false; } } else { // Obtain new reader and writer from the existing debugger reader = debugger.newConnectionReader(reader); writer = debugger.newConnectionWriter(writer); } } } /** * Fires listeners on connection established events. */ private static void connectionEstablished(XMPPConnection connection) { ConnectionEstablishedListener[] listeners = null; synchronized (connectionEstablishedListeners) { listeners = new ConnectionEstablishedListener[connectionEstablishedListeners.size()]; connectionEstablishedListeners.toArray(listeners); } for (int i = 0; i < listeners.length; i++) { listeners[i].connectionEstablished(connection); } } /*********************************************** * TLS code below **********************************************/ /** * Returns true if the connection to the server has successfully negotiated TLS. Once TLS * has been negotiatied the connection has been secured. * * @return true if the connection to the server has successfully negotiated TLS. */ public boolean isUsingTLS() { return usingTLS; } /** * Returns the SASLAuthentication manager that is responsible for authenticating with * the server. * * @return the SASLAuthentication manager that is responsible for authenticating with * the server. */ public SASLAuthentication getSASLAuthentication() { return saslAuthentication; } /** * Notification message saying that the server supports TLS so confirm the server that we * want to secure the connection. */ void startTLSReceived() { try { writer.write(""); writer.flush(); } catch (IOException e) { packetReader.notifyConnectionError(e); } } /** * The server has indicated that TLS negotiation can start. We now need to secure the * existing plain connection and perform a handshake. This method won't return until the * connection has finished the handshake or an error occured while securing the connection. */ void proceedTLSReceived() throws Exception { SSLContext context = SSLContext.getInstance("TLS"); // Accept any certificate presented by the server context.init(null, // KeyManager not required new javax.net.ssl.TrustManager[]{new OpenTrustManager()}, new java.security.SecureRandom()); Socket plain = socket; // Secure the plain connection socket = context.getSocketFactory().createSocket(plain, plain.getInetAddress().getHostName(), plain.getPort(), true); socket.setSoTimeout(0); socket.setKeepAlive(true); // Initialize the reader and writer with the new secured version initReaderAndWriter(); // Proceed to do the handshake ((SSLSocket) socket).startHandshake(); // Set that TLS was successful usingTLS = true; // Set the new writer to use packetWriter.setWriter(writer); // Send a new opening stream to the server packetWriter.openStream(); } }