Exemplo n.º 1
0
  /**
   * 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) {
      packetReader.notifyConnectionError(
          new IllegalStateException(
              "TLS required by server but not allowed by connection configuration"));
      return;
    }

    if (required && usingSSL) {
      packetReader.notifyConnectionError(
          new IllegalStateException("TLS required by server but legacy SSL already enabled"));
      return;
    }

    if ((config.getSecurityMode() == ConnectionConfiguration.SecurityMode.disabled)
        || (config.getSecurityMode() == ConnectionConfiguration.SecurityMode.legacy)) {
      // Do not secure the connection using TLS since TLS was disabled or we are using SSL.
      return;
    }

    try {
      writer.write("<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\"/>");
      writer.flush();
    } catch (IOException e) {
      packetReader.notifyConnectionError(e);
    }
  }
Exemplo n.º 2
0
  /**
   * 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.
    PacketWriter packetWriter = this.packetWriter;
    if (packetWriter != null) {
      packetWriter.sendPacket(unavailablePresence);
    }

    this.setWasAuthenticated(authenticated);
    authenticated = false;
    connected = false;

    PacketReader packetReader = this.packetReader;
    if (packetReader != null) {
      packetReader.shutdown();
    }
    packetWriter = this.packetWriter;
    if (packetWriter != null) {
      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.
    Reader reader = this.reader;
    if (reader != null) {
      try {
        reader.close();
      } catch (Throwable ignore) {
        /* ignore */
      }
      this.reader = null;
    }
    Writer writer = this.writer;
    if (writer != null) {
      try {
        writer.close();
      } catch (Throwable ignore) {
        /* ignore */
      }
      this.writer = null;
    }

    try {
      socket.close();
    } catch (Exception e) {
      // Ignore.
    }

    saslAuthentication.init();
  }
Exemplo n.º 3
0
 /**
  * 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() {
   try {
     writer.write("<compress xmlns='http://jabber.org/protocol/compress'>");
     writer.write("<method>zlib</method></compress>");
     writer.flush();
   } catch (IOException e) {
     packetReader.notifyConnectionError(e);
   }
 }
Exemplo n.º 4
0
  public void disconnect(Presence unavailablePresence) {
    // If not connected, ignore this request.
    PacketReader packetReader = this.packetReader;
    PacketWriter packetWriter = this.packetWriter;
    if (packetReader == null || packetWriter == null) {
      return;
    }

    shutdown(unavailablePresence);

    if (roster != null) {
      roster.cleanup();
      roster = null;
    }
    chatManager = null;

    wasAuthenticated = false;

    packetWriter.cleanup();
    this.packetWriter = null;
    packetReader.cleanup();
    this.packetReader = null;
  }
Exemplo n.º 5
0
 /**
  * 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 appropiate error messages to end-users.
  */
 public void connect() throws XMPPException {
   // Stablishes the connection, readers and writers
   connectUsingConfiguration(config);
   // Automatically makes the login if the user was previouslly connected successfully
   // to the server and the connection was terminated abruptly
   if (connected && wasAuthenticated) {
     // Make the login
     try {
       if (isAnonymous()) {
         // Make the anonymous login
         loginAnonymously();
       } else {
         login(config.getUsername(), config.getPassword(), config.getResource());
       }
       packetReader.notifyReconnection();
     } catch (XMPPException e) {
       e.printStackTrace();
     }
   }
 }
Exemplo n.º 6
0
  /**
   * 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 {
    PacketReader packetReader = this.packetReader;
    PacketWriter packetWriter = this.packetWriter;
    boolean isFirstInitialization = packetReader == null || packetWriter == null;
    usingCompression = false;

    // Set the reader and writer instance variables
    initReaderAndWriter();

    try {
      if (isFirstInitialization) {
        this.packetWriter = packetWriter = new PacketWriter(this);
        this.packetReader = 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;

      // Start keep alive process (after TLS was negotiated - if available)
      packetWriter.startKeepAliveProcess();

      if (isFirstInitialization) {
        // Notify listeners that a new connection has been established
        for (ConnectionCreationListener listener : getConnectionCreationListeners()) {
          listener.connectionCreated(this);
        }
      } else if (!wasAuthenticated) {
        packetReader.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 */
        }
        this.packetWriter = null;
      }
      if (packetReader != null) {
        try {
          packetReader.shutdown();
        } catch (Throwable ignore) {
          /* ignore */
        }
        this.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.
    }
  }