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Diffstat (limited to 'src/org/jivesoftware/smack/XMPPConnection.java')
| -rw-r--r-- | src/org/jivesoftware/smack/XMPPConnection.java | 1116 |
1 files changed, 1116 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smack/XMPPConnection.java b/src/org/jivesoftware/smack/XMPPConnection.java new file mode 100644 index 0000000..badf29c --- /dev/null +++ b/src/org/jivesoftware/smack/XMPPConnection.java @@ -0,0 +1,1116 @@ +/** + * $RCSfile$ + * $Revision$ + * $Date$ + * + * Copyright 2003-2007 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.compression.XMPPInputOutputStream; +import org.jivesoftware.smack.filter.PacketFilter; +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 org.jivesoftware.smack.util.dns.HostAddress; + +import javax.net.ssl.KeyManager; +import javax.net.ssl.KeyManagerFactory; +import javax.net.ssl.SSLContext; +import javax.net.ssl.SSLSocket; +import org.apache.harmony.javax.security.auth.callback.Callback; +import org.apache.harmony.javax.security.auth.callback.CallbackHandler; +import org.apache.harmony.javax.security.auth.callback.PasswordCallback; + +import java.io.BufferedReader; +import java.io.BufferedWriter; +import java.io.ByteArrayInputStream; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.io.OutputStream; +import java.io.OutputStreamWriter; +import java.lang.reflect.Constructor; +import java.net.Socket; +import java.net.UnknownHostException; +import java.security.KeyStore; +import java.security.Provider; +import java.security.Security; +import java.util.Collection; +import java.util.Iterator; +import java.util.LinkedList; +import java.util.List; + +/** + * Creates a socket connection to a XMPP server. This is the default connection + * to a Jabber server and is specified in the XMPP Core (RFC 3920). + * + * @see Connection + * @author Matt Tucker + */ +public class XMPPConnection extends Connection { + + /** + * The socket which is used for this connection. + */ + Socket socket; + + String connectionID = null; + private String user = null; + private boolean connected = false; + // socketClosed is used concurrent + // by XMPPConnection, PacketReader, PacketWriter + private volatile boolean socketClosed = false; + + /** + * Flag that indicates if the user is currently authenticated with the server. + */ + private boolean authenticated = false; + /** + * Flag that indicates if the user was authenticated with the server when the connection + * to the server was closed (abruptly or not). + */ + private boolean wasAuthenticated = false; + private boolean anonymous = false; + private boolean usingTLS = false; + + PacketWriter packetWriter; + PacketReader packetReader; + + Roster roster = null; + + /** + * Collection of available stream compression methods offered by the server. + */ + private Collection<String> compressionMethods; + + /** + * Set to true by packet writer if the server acknowledged the compression + */ + private boolean serverAckdCompression = false; + + /** + * Creates a new connection to the specified XMPP server. A DNS SRV lookup will be + * performed to determine the IP address and port corresponding to the + * service name; if that lookup fails, it's assumed that server resides at + * <tt>serviceName</tt> with the default port of 5222. Encrypted connections (TLS) + * will be used if available, stream compression is disabled, and standard SASL + * mechanisms will be used for authentication.<p> + * <p/> + * This is the simplest constructor for connecting to an XMPP server. Alternatively, + * you can get fine-grained control over connection settings using the + * {@link #XMPPConnection(ConnectionConfiguration)} constructor.<p> + * <p/> + * Note that XMPPConnection constructors do not establish a connection to the server + * and you must call {@link #connect()}.<p> + * <p/> + * The CallbackHandler will only be used if the connection requires the client provide + * an SSL certificate to the server. The CallbackHandler must handle the PasswordCallback + * to prompt for a password to unlock the keystore containing the SSL certificate. + * + * @param serviceName the name of the XMPP server to connect to; e.g. <tt>example.com</tt>. + * @param callbackHandler the CallbackHandler used to prompt for the password to the keystore. + */ + public XMPPConnection(String serviceName, CallbackHandler callbackHandler) { + // Create the configuration for this new connection + super(new ConnectionConfiguration(serviceName)); + config.setCompressionEnabled(false); + config.setSASLAuthenticationEnabled(true); + config.setDebuggerEnabled(DEBUG_ENABLED); + config.setCallbackHandler(callbackHandler); + } + + /** + * Creates a new XMPP connection in the same way {@link #XMPPConnection(String,CallbackHandler)} does, but + * with no callback handler for password prompting of the keystore. This will work + * in most cases, provided the client is not required to provide a certificate to + * the server. + * + * @param serviceName the name of the XMPP server to connect to; e.g. <tt>example.com</tt>. + */ + public XMPPConnection(String serviceName) { + // Create the configuration for this new connection + super(new ConnectionConfiguration(serviceName)); + config.setCompressionEnabled(false); + config.setSASLAuthenticationEnabled(true); + config.setDebuggerEnabled(DEBUG_ENABLED); + } + + /** + * Creates a new XMPP connection in the same way {@link #XMPPConnection(ConnectionConfiguration,CallbackHandler)} does, but + * with no callback handler for password prompting of the keystore. This will work + * in most cases, provided the client is not required to provide a certificate to + * the server. + * + * + * @param config the connection configuration. + */ + public XMPPConnection(ConnectionConfiguration config) { + super(config); + } + + /** + * Creates a new XMPP connection using the specified connection configuration.<p> + * <p/> + * Manually specifying connection configuration information is suitable for + * advanced users of the API. In many cases, using the + * {@link #XMPPConnection(String)} constructor is a better approach.<p> + * <p/> + * Note that XMPPConnection constructors do not establish a connection to the server + * and you must call {@link #connect()}.<p> + * <p/> + * + * The CallbackHandler will only be used if the connection requires the client provide + * an SSL certificate to the server. The CallbackHandler must handle the PasswordCallback + * to prompt for a password to unlock the keystore containing the SSL certificate. + * + * @param config the connection configuration. + * @param callbackHandler the CallbackHandler used to prompt for the password to the keystore. + */ + public XMPPConnection(ConnectionConfiguration config, CallbackHandler callbackHandler) { + super(config); + config.setCallbackHandler(callbackHandler); + } + + public String getConnectionID() { + if (!isConnected()) { + return null; + } + return connectionID; + } + + public String getUser() { + if (!isAuthenticated()) { + return null; + } + return user; + } + + @Override + public synchronized void login(String username, String password, String resource) 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; + if (config.isSASLAuthenticationEnabled() && + saslAuthentication.hasNonAnonymousAuthentication()) { + // Authenticate using SASL + if (password != null) { + response = saslAuthentication.authenticate(username, password, resource); + } + else { + response = saslAuthentication + .authenticate(username, resource, config.getCallbackHandler()); + } + } + 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 + config.setServiceName(StringUtils.parseServer(response)); + } + else { + this.user = username + "@" + getServiceName(); + if (resource != null) { + this.user += "/" + resource; + } + } + + // If compression is enabled then request the server to use stream compression + if (config.isCompressionEnabled()) { + useCompression(); + } + + // Indicate that we're now authenticated. + authenticated = true; + anonymous = false; + + // Create the roster if it is not a reconnection or roster already created by getRoster() + if (this.roster == null) { + if(rosterStorage==null){ + this.roster = new Roster(this); + } + else{ + this.roster = new Roster(this,rosterStorage); + } + } + if (config.isRosterLoadedAtLogin()) { + this.roster.reload(); + } + + // Set presence to online. + if (config.isSendPresence()) { + packetWriter.sendPacket(new Presence(Presence.Type.available)); + } + + // Stores the authentication for future reconnection + config.setLoginInfo(username, password, resource); + + // 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 (config.isDebuggerEnabled() && debugger != null) { + debugger.userHasLogged(user); + } + } + + @Override + 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; + if (config.isSASLAuthenticationEnabled() && + 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 + config.setServiceName(StringUtils.parseServer(response)); + + // If compression is enabled then request the server to use stream compression + if (config.isCompressionEnabled()) { + useCompression(); + } + + // 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 (config.isDebuggerEnabled() && debugger != null) { + debugger.userHasLogged(user); + } + } + + public Roster getRoster() { + // synchronize against login() + synchronized(this) { + // if connection is authenticated the roster is already set by login() + // or a previous call to getRoster() + if (!isAuthenticated() || isAnonymous()) { + if (roster == null) { + roster = new Roster(this); + } + return roster; + } + } + + if (!config.isRosterLoadedAtLogin()) { + roster.reload(); + } + // 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; + } + + public boolean isConnected() { + return connected; + } + + public boolean isSecureConnection() { + return isUsingTLS(); + } + + public boolean isSocketClosed() { + return socketClosed; + } + + public boolean isAuthenticated() { + return authenticated; + } + + public boolean isAnonymous() { + return anonymous; + } + + /** + * Closes the connection by setting presence to unavailable then closing the stream to + * the XMPP server. The shutdown logic will be used during a planned disconnection or when + * dealing with an unexpected disconnection. Unlike {@link #disconnect()} the connection's + * packet reader, packet writer, and {@link Roster} will not be removed; thus + * connection's state is kept. + * + * @param unavailablePresence the presence packet to send during shutdown. + */ + protected void shutdown(Presence unavailablePresence) { + // Set presence to offline. + if (packetWriter != null) { + packetWriter.sendPacket(unavailablePresence); + } + + this.setWasAuthenticated(authenticated); + authenticated = false; + + if (packetReader != null) { + packetReader.shutdown(); + } + if (packetWriter != null) { + packetWriter.shutdown(); + } + + // Wait 150 ms for processes to clean-up, then shutdown. + try { + Thread.sleep(150); + } + catch (Exception e) { + // Ignore. + } + + // Set socketClosed to true. This will cause the PacketReader + // and PacketWriter to ingore any Exceptions that are thrown + // because of a read/write from/to a closed stream. + // It is *important* that this is done before socket.close()! + socketClosed = true; + try { + socket.close(); + } catch (Exception e) { + e.printStackTrace(); + } + // In most cases the close() should be successful, so set + // connected to false here. + connected = false; + + // Close down the readers and writers. + if (reader != null) { + try { + // Should already be closed by the previous + // socket.close(). But just in case do it explicitly. + reader.close(); + } + catch (Throwable ignore) { /* ignore */ } + reader = null; + } + if (writer != null) { + try { + // Should already be closed by the previous + // socket.close(). But just in case do it explicitly. + writer.close(); + } + catch (Throwable ignore) { /* ignore */ } + writer = null; + } + + // Make sure that the socket is really closed + try { + // Does nothing if the socket is already closed + socket.close(); + } + catch (Exception e) { + // Ignore. + } + + saslAuthentication.init(); + } + + public synchronized void disconnect(Presence unavailablePresence) { + // If not connected, ignore this request. + PacketReader packetReader = this.packetReader; + PacketWriter packetWriter = this.packetWriter; + if (packetReader == null || packetWriter == null) { + return; + } + + if (!isConnected()) { + return; + } + + shutdown(unavailablePresence); + + if (roster != null) { + roster.cleanup(); + roster = null; + } + chatManager = null; + + wasAuthenticated = false; + + packetWriter.cleanup(); + packetReader.cleanup(); + } + + 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 interceptor with this connection. The interceptor will be + * invoked every time a packet is about to be sent by this connection. Interceptors + * may modify the packet to be sent. A packet filter determines which packets + * will be delivered to the interceptor. + * + * @param packetInterceptor the packet interceptor to notify of packets about to be sent. + * @param packetFilter the packet filter to use. + * @deprecated replaced by {@link Connection#addPacketInterceptor(PacketInterceptor, PacketFilter)}. + */ + public void addPacketWriterInterceptor(PacketInterceptor packetInterceptor, + PacketFilter packetFilter) { + addPacketInterceptor(packetInterceptor, packetFilter); + } + + /** + * Removes a packet interceptor. + * + * @param packetInterceptor the packet interceptor to remove. + * @deprecated replaced by {@link Connection#removePacketInterceptor(PacketInterceptor)}. + */ + public void removePacketWriterInterceptor(PacketInterceptor packetInterceptor) { + removePacketInterceptor(packetInterceptor); + } + + /** + * 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. Note that the thread + * that writes packets will be used to invoke the listeners. Therefore, each + * packet listener should complete all operations quickly or use a different + * thread for processing. + * + * @param packetListener the packet listener to notify of sent packets. + * @param packetFilter the packet filter to use. + * @deprecated replaced by {@link #addPacketSendingListener(PacketListener, PacketFilter)}. + */ + public void addPacketWriterListener(PacketListener packetListener, PacketFilter packetFilter) { + addPacketSendingListener(packetListener, packetFilter); + } + + /** + * Removes a packet listener for sending packets from this connection. + * + * @param packetListener the packet listener to remove. + * @deprecated replaced by {@link #removePacketSendingListener(PacketListener)}. + */ + public void removePacketWriterListener(PacketListener packetListener) { + removePacketSendingListener(packetListener); + } + + private void connectUsingConfiguration(ConnectionConfiguration config) throws XMPPException { + XMPPException exception = null; + Iterator<HostAddress> it = config.getHostAddresses().iterator(); + List<HostAddress> failedAddresses = new LinkedList<HostAddress>(); + boolean xmppIOError = false; + while (it.hasNext()) { + exception = null; + HostAddress hostAddress = it.next(); + String host = hostAddress.getFQDN(); + int port = hostAddress.getPort(); + try { + if (config.getSocketFactory() == null) { + this.socket = new Socket(host, port); + } + else { + this.socket = config.getSocketFactory().createSocket(host, port); + } + } catch (UnknownHostException uhe) { + String errorMessage = "Could not connect to " + host + ":" + port + "."; + exception = new XMPPException(errorMessage, new XMPPError(XMPPError.Condition.remote_server_timeout, + errorMessage), uhe); + } catch (IOException ioe) { + String errorMessage = "XMPPError connecting to " + host + ":" + port + "."; + exception = new XMPPException(errorMessage, new XMPPError(XMPPError.Condition.remote_server_error, + errorMessage), ioe); + xmppIOError = true; + } + if (exception == null) { + // We found a host to connect to, break here + config.setUsedHostAddress(hostAddress); + break; + } + hostAddress.setException(exception); + failedAddresses.add(hostAddress); + if (!it.hasNext()) { + // There are no more host addresses to try + // throw an exception and report all tried + // HostAddresses in the exception + StringBuilder sb = new StringBuilder(); + for (HostAddress fha : failedAddresses) { + sb.append(fha.getErrorMessage()); + sb.append("; "); + } + XMPPError xmppError; + if (xmppIOError) { + xmppError = new XMPPError(XMPPError.Condition.remote_server_error); + } + else { + xmppError = new XMPPError(XMPPError.Condition.remote_server_timeout); + } + throw new XMPPException(sb.toString(), xmppError); + } + } + socketClosed = false; + initConnection(); + } + + /** + * 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 initConnection() throws XMPPException { + boolean isFirstInitialization = packetReader == null || packetWriter == null; + compressionHandler = null; + serverAckdCompression = false; + + // Set the reader and writer instance variables + initReaderAndWriter(); + + try { + if (isFirstInitialization) { + 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 (config.isDebuggerEnabled()) { + addPacketListener(debugger.getReaderListener(), null); + if (debugger.getWriterListener() != null) { + addPacketSendingListener(debugger.getWriterListener(), null); + } + } + } + else { + packetWriter.init(); + packetReader.init(); + } + + // 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; + + if (isFirstInitialization) { + // Notify listeners that a new connection has been established + for (ConnectionCreationListener listener : getConnectionCreationListeners()) { + listener.connectionCreated(this); + } + } + else if (!wasAuthenticated) { + notifyReconnection(); + } + + } + 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; + } + this.setWasAuthenticated(authenticated); + chatManager = null; + authenticated = false; + connected = false; + + throw ex; // Everything stoppped. Now throw the exception. + } + } + + private void initReaderAndWriter() throws XMPPException { + try { + if (compressionHandler == null) { + reader = + new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8")); + writer = new BufferedWriter( + new OutputStreamWriter(socket.getOutputStream(), "UTF-8")); + } + else { + try { + OutputStream os = compressionHandler.getOutputStream(socket.getOutputStream()); + writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8")); + + InputStream is = compressionHandler.getInputStream(socket.getInputStream()); + reader = new BufferedReader(new InputStreamReader(is, "UTF-8")); + } + catch (Exception e) { + e.printStackTrace(); + compressionHandler = null; + 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(XMPPError.Condition.remote_server_error, + "XMPPError establishing connection with server."), + ioe); + } + + // If debugging is enabled, we open a window and write out all network traffic. + initDebugger(); + } + + /*********************************************** + * 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; + } + + /** + * Notification message saying that the server supports TLS so confirm the server that we + * want to secure the connection. + * + * @param required true when the server indicates that TLS is required. + */ + void startTLSReceived(boolean required) { + if (required && config.getSecurityMode() == + ConnectionConfiguration.SecurityMode.disabled) { + notifyConnectionError(new IllegalStateException( + "TLS required by server but not allowed by connection configuration")); + return; + } + + if (config.getSecurityMode() == ConnectionConfiguration.SecurityMode.disabled) { + // Do not secure the connection using TLS since TLS was disabled + return; + } + try { + writer.write("<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\"/>"); + writer.flush(); + } + catch (IOException e) { + 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. + * + * @throws Exception if an exception occurs. + */ + void proceedTLSReceived() throws Exception { + SSLContext context = this.config.getCustomSSLContext(); + KeyStore ks = null; + KeyManager[] kms = null; + PasswordCallback pcb = null; + + if(config.getCallbackHandler() == null) { + ks = null; + } else if (context == null) { + //System.out.println("Keystore type: "+configuration.getKeystoreType()); + if(config.getKeystoreType().equals("NONE")) { + ks = null; + pcb = null; + } + else if(config.getKeystoreType().equals("PKCS11")) { + try { + Constructor<?> c = Class.forName("sun.security.pkcs11.SunPKCS11").getConstructor(InputStream.class); + String pkcs11Config = "name = SmartCard\nlibrary = "+config.getPKCS11Library(); + ByteArrayInputStream config = new ByteArrayInputStream(pkcs11Config.getBytes()); + Provider p = (Provider)c.newInstance(config); + Security.addProvider(p); + ks = KeyStore.getInstance("PKCS11",p); + pcb = new PasswordCallback("PKCS11 Password: ",false); + this.config.getCallbackHandler().handle(new Callback[]{pcb}); + ks.load(null,pcb.getPassword()); + } + catch (Exception e) { + ks = null; + pcb = null; + } + } + else if(config.getKeystoreType().equals("Apple")) { + ks = KeyStore.getInstance("KeychainStore","Apple"); + ks.load(null,null); + //pcb = new PasswordCallback("Apple Keychain",false); + //pcb.setPassword(null); + } + else { + ks = KeyStore.getInstance(config.getKeystoreType()); + try { + pcb = new PasswordCallback("Keystore Password: ",false); + config.getCallbackHandler().handle(new Callback[]{pcb}); + ks.load(new FileInputStream(config.getKeystorePath()), pcb.getPassword()); + } + catch(Exception e) { + ks = null; + pcb = null; + } + } + KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509"); + try { + if(pcb == null) { + kmf.init(ks,null); + } else { + kmf.init(ks,pcb.getPassword()); + pcb.clearPassword(); + } + kms = kmf.getKeyManagers(); + } catch (NullPointerException npe) { + kms = null; + } + } + + // Verify certificate presented by the server + if (context == null) { + context = SSLContext.getInstance("TLS"); + context.init(kms, new javax.net.ssl.TrustManager[] { new ServerTrustManager(getServiceName(), config) }, + new java.security.SecureRandom()); + } + Socket plain = socket; + // Secure the plain connection + socket = context.getSocketFactory().createSocket(plain, + plain.getInetAddress().getHostAddress(), 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(); + //if (((SSLSocket) socket).getWantClientAuth()) { + // System.err.println("Connection wants client auth"); + //} + //else if (((SSLSocket) socket).getNeedClientAuth()) { + // System.err.println("Connection needs client auth"); + //} + //else { + // System.err.println("Connection does not require client auth"); + // } + // 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(); + } + + /** + * Sets the available stream compression methods offered by the server. + * + * @param methods compression methods offered by the server. + */ + void setAvailableCompressionMethods(Collection<String> methods) { + compressionMethods = methods; + } + + /** + * Returns the compression handler that can be used for one compression methods offered by the server. + * + * @return a instance of XMPPInputOutputStream or null if no suitable instance was found + * + */ + private XMPPInputOutputStream maybeGetCompressionHandler() { + if (compressionMethods != null) { + for (XMPPInputOutputStream handler : compressionHandlers) { + if (!handler.isSupported()) + continue; + + String method = handler.getCompressionMethod(); + if (compressionMethods.contains(method)) + return handler; + } + } + return null; + } + + public boolean isUsingCompression() { + return compressionHandler != null && serverAckdCompression; + } + + /** + * Starts using stream compression that will compress network traffic. Traffic can be + * reduced up to 90%. Therefore, stream compression is ideal when using a slow speed network + * connection. However, the server and the client will need to use more CPU time in order to + * un/compress network data so under high load the server performance might be affected.<p> + * <p/> + * Stream compression has to have been previously offered by the server. Currently only the + * zlib method is supported by the client. Stream compression negotiation has to be done + * before authentication took place.<p> + * <p/> + * Note: to use stream compression the smackx.jar file has to be present in the classpath. + * + * @return true if stream compression negotiation was successful. + */ + private boolean useCompression() { + // If stream compression was offered by the server and we want to use + // compression then send compression request to the server + if (authenticated) { + throw new IllegalStateException("Compression should be negotiated before authentication."); + } + + if ((compressionHandler = maybeGetCompressionHandler()) != null) { + requestStreamCompression(compressionHandler.getCompressionMethod()); + // Wait until compression is being used or a timeout happened + synchronized (this) { + try { + this.wait(SmackConfiguration.getPacketReplyTimeout() * 5); + } + catch (InterruptedException e) { + // Ignore. + } + } + return isUsingCompression(); + } + return false; + } + + /** + * Request the server that we want to start using stream compression. When using TLS + * then negotiation of stream compression can only happen after TLS was negotiated. If TLS + * compression is being used the stream compression should not be used. + */ + private void requestStreamCompression(String method) { + try { + writer.write("<compress xmlns='http://jabber.org/protocol/compress'>"); + writer.write("<method>" + method + "</method></compress>"); + writer.flush(); + } + catch (IOException e) { + notifyConnectionError(e); + } + } + + /** + * Start using stream compression since the server has acknowledged stream compression. + * + * @throws Exception if there is an exception starting stream compression. + */ + void startStreamCompression() throws Exception { + serverAckdCompression = true; + // Initialize the reader and writer with the new secured version + initReaderAndWriter(); + + // Set the new writer to use + packetWriter.setWriter(writer); + // Send a new opening stream to the server + packetWriter.openStream(); + // Notify that compression is being used + synchronized (this) { + this.notify(); + } + } + + /** + * Notifies the XMPP connection that stream compression was denied so that + * the connection process can proceed. + */ + void streamCompressionDenied() { + synchronized (this) { + this.notify(); + } + } + + /** + * Establishes a connection to the XMPP server and performs an automatic login + * only if the previous connection state was logged (authenticated). It basically + * creates and maintains a socket connection to the server.<p> + * <p/> + * Listeners will be preserved from a previous connection if the reconnection + * occurs after an abrupt termination. + * + * @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 + * appropriate error messages to end-users. + */ + public void connect() throws XMPPException { + // Establishes the connection, readers and writers + connectUsingConfiguration(config); + // Automatically makes the login if the user was previously connected successfully + // to the server and the connection was terminated abruptly + if (connected && wasAuthenticated) { + // Make the login + if (isAnonymous()) { + // Make the anonymous login + loginAnonymously(); + } + else { + login(config.getUsername(), config.getPassword(), config.getResource()); + } + notifyReconnection(); + } + } + + /** + * Sets whether the connection has already logged in the server. + * + * @param wasAuthenticated true if the connection has already been authenticated. + */ + private void setWasAuthenticated(boolean wasAuthenticated) { + if (!this.wasAuthenticated) { + this.wasAuthenticated = wasAuthenticated; + } + } + + @Override + public void setRosterStorage(RosterStorage storage) + throws IllegalStateException { + if(roster!=null){ + throw new IllegalStateException("Roster is already initialized"); + } + this.rosterStorage = storage; + } + + /** + * Sends out a notification that there was an error with the connection + * and closes the connection. Also prints the stack trace of the given exception + * + * @param e the exception that causes the connection close event. + */ + synchronized void notifyConnectionError(Exception e) { + // Listeners were already notified of the exception, return right here. + if (packetReader.done && packetWriter.done) return; + + packetReader.done = true; + packetWriter.done = true; + // Closes the connection temporary. A reconnection is possible + shutdown(new Presence(Presence.Type.unavailable)); + // Print the stack trace to help catch the problem + e.printStackTrace(); + // Notify connection listeners of the error. + for (ConnectionListener listener : getConnectionListeners()) { + try { + listener.connectionClosedOnError(e); + } + catch (Exception e2) { + // Catch and print any exception so we can recover + // from a faulty listener + e2.printStackTrace(); + } + } + } + + + /** + * Sends a notification indicating that the connection was reconnected successfully. + */ + protected void notifyReconnection() { + // Notify connection listeners of the reconnection. + for (ConnectionListener listener : getConnectionListeners()) { + try { + listener.reconnectionSuccessful(); + } + catch (Exception e) { + // Catch and print any exception so we can recover + // from a faulty listener + e.printStackTrace(); + } + } + } +} |