示例#1
0
  /**
   * Handles a specific <tt>IOException</tt> which was thrown during the execution of {@link
   * #runInConnectThread(DTLSProtocol, TlsPeer, DatagramTransport)} while trying to establish a DTLS
   * connection
   *
   * @param ioe the <tt>IOException</tt> to handle
   * @param msg the human-readable message to log about the specified <tt>ioe</tt>
   * @param i the number of tries remaining after the current one
   * @return <tt>true</tt> if the specified <tt>ioe</tt> was successfully handled; <tt>false</tt>,
   *     otherwise
   */
  private boolean handleRunInConnectThreadException(IOException ioe, String msg, int i) {
    // SrtpControl.start(MediaType) starts its associated TransformEngine.
    // We will use that mediaType to signal the normal stop then as well
    // i.e. we will ignore exception after the procedure to stop this
    // PacketTransformer has begun.
    if (mediaType == null) return false;

    if (ioe instanceof TlsFatalAlert) {
      TlsFatalAlert tfa = (TlsFatalAlert) ioe;
      short alertDescription = tfa.getAlertDescription();

      if (alertDescription == AlertDescription.unexpected_message) {
        msg += " Received fatal unexpected message.";
        if (i == 0
            || !Thread.currentThread().equals(connectThread)
            || connector == null
            || mediaType == null) {
          msg += " Giving up after " + (CONNECT_TRIES - i) + " retries.";
        } else {
          msg += " Will retry.";
          logger.error(msg, ioe);

          return true;
        }
      } else {
        msg += " Received fatal alert " + alertDescription + ".";
      }
    }

    logger.error(msg, ioe);
    return false;
  }
  /**
   * Closes given {@link #transportManagers} of this <tt>Conference</tt> and removes corresponding
   * channel bundle.
   */
  void closeTransportManager(TransportManager transportManager) {
    synchronized (transportManagers) {
      for (Iterator<IceUdpTransportManager> i = transportManagers.values().iterator();
          i.hasNext(); ) {
        if (i.next() == transportManager) {
          i.remove();
          // Presumably, we have a single association for
          // transportManager.
          break;
        }
      }

      // Close manager
      try {
        transportManager.close();
      } catch (Throwable t) {
        logger.warn(
            "Failed to close an IceUdpTransportManager of" + " conference " + getID() + "!", t);
        // The whole point of explicitly closing the
        // transportManagers of this Conference is to prevent memory
        // leaks. Hence, it does not make sense to possibly leave
        // TransportManagers open because a TransportManager has
        // failed to close.
        if (t instanceof InterruptedException) Thread.currentThread().interrupt();
        else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
      }
    }
  }
示例#3
0
    private void expireLoop() {
      while (enabled) {
        // Sleep
        try {
          synchronized (sleepLock) {
            sleepLock.wait(POLL_INTERVAL);
          }
        } catch (InterruptedException e) {
          Thread.currentThread().interrupt();
        }

        if (!enabled) break;

        // Loop over conferences
        for (JitsiMeetConference conference :
            new ArrayList<JitsiMeetConference>(conferences.values())) {
          long idleStamp = conference.getIdleTimestamp();
          // Is active ?
          if (idleStamp == -1) {
            continue;
          }
          if (System.currentTimeMillis() - idleStamp > timeout) {
            logger.info("Focus idle timeout for " + conference.getRoomName());

            conference.stop();
          }
        }
      }
    }
示例#4
0
    void stop() {
      if (timeoutThread == null) {
        return;
      }

      enabled = false;

      synchronized (sleepLock) {
        sleepLock.notifyAll();
      }

      try {
        if (Thread.currentThread() != timeoutThread) {
          timeoutThread.join();
        }
        timeoutThread = null;
      } catch (InterruptedException e) {
        throw new RuntimeException(e);
      }
    }
示例#5
0
  /**
   * Determines whether {@link #runInConnectThread(DTLSProtocol, TlsPeer, DatagramTransport)} is to
   * try to establish a DTLS connection.
   *
   * @param i the number of tries remaining after the current one
   * @param datagramTransport
   * @return <tt>true</tt> to try to establish a DTLS connection; otherwise, <tt>false</tt>
   */
  private boolean enterRunInConnectThreadLoop(int i, DatagramTransport datagramTransport) {
    if (i < 0 || i > CONNECT_TRIES) {
      return false;
    } else {
      Thread currentThread = Thread.currentThread();

      synchronized (this) {
        if (i > 0 && i < CONNECT_TRIES - 1) {
          boolean interrupted = false;

          try {
            wait(CONNECT_RETRY_INTERVAL);
          } catch (InterruptedException ie) {
            interrupted = true;
          }
          if (interrupted) currentThread.interrupt();
        }

        return currentThread.equals(this.connectThread)
            && datagramTransport.equals(this.datagramTransport);
      }
    }
  }
  /**
   * Expires this <tt>Conference</tt>, its <tt>Content</tt>s and their respective <tt>Channel</tt>s.
   * Releases the resources acquired by this instance throughout its life time and prepares it to be
   * garbage collected.
   */
  public void expire() {
    synchronized (this) {
      if (expired) return;
      else expired = true;
    }

    EventAdmin eventAdmin = videobridge.getEventAdmin();
    if (eventAdmin != null) eventAdmin.sendEvent(EventFactory.conferenceExpired(this));

    setRecording(false);
    if (recorderEventHandler != null) {
      recorderEventHandler.close();
      recorderEventHandler = null;
    }

    Videobridge videobridge = getVideobridge();

    try {
      videobridge.expireConference(this);
    } finally {
      // Expire the Contents of this Conference.
      for (Content content : getContents()) {
        try {
          content.expire();
        } catch (Throwable t) {
          logger.warn(
              "Failed to expire content " + content.getName() + " of conference " + getID() + "!",
              t);
          if (t instanceof InterruptedException) Thread.currentThread().interrupt();
          else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
        }
      }

      // Close the transportManagers of this Conference. Normally, there
      // will be no TransportManager left to close at this point because
      // all Channels have expired and the last Channel to be removed from
      // a TransportManager closes the TransportManager. However, a
      // Channel may have expired before it has learned of its
      // TransportManager and then the TransportManager will not close.
      closeTransportManagers();

      if (logger.isInfoEnabled()) {
        logger.info(
            "Expired conference " + getID() + ". " + videobridge.getConferenceCountString());
      }
    }
  }
示例#7
0
  /**
   * Gets the {@code SRTPTransformer} used by this instance. If {@link #_srtpTransformer} does not
   * exist (yet) and the state of this instance indicates that its initialization is in progess,
   * then blocks until {@code _srtpTransformer} is initialized and returns it.
   *
   * @return the {@code SRTPTransformer} used by this instance
   */
  private SinglePacketTransformer waitInitializeAndGetSRTPTransformer() {
    SinglePacketTransformer srtpTransformer = _srtpTransformer;

    if (srtpTransformer != null) return srtpTransformer;

    if (rtcpmux && Component.RTCP == componentID) return initializeSRTCPTransformerFromRtp();

    // XXX It is our explicit policy to rely on the SrtpListener to notify
    // the user that the session is not secure. Unfortunately, (1) the
    // SrtpListener is not supported by this DTLS SrtpControl implementation
    // and (2) encrypted packets may arrive soon enough to be let through
    // while _srtpTransformer is still initializing. Consequently, we will
    // block and wait for _srtpTransformer to initialize.
    boolean interrupted = false;

    try {
      synchronized (this) {
        do {
          srtpTransformer = _srtpTransformer;
          if (srtpTransformer != null) break; // _srtpTransformer is initialized

          if (connectThread == null) {
            // Though _srtpTransformer is NOT initialized, there is
            // no point in waiting because there is no one to
            // initialize it.
            break;
          }

          try {
            // It does not really matter (enough) how much we wait
            // here because we wait in a loop.
            long timeout = CONNECT_TRIES * CONNECT_RETRY_INTERVAL;

            wait(timeout);
          } catch (InterruptedException ie) {
            interrupted = true;
          }
        } while (true);
      }
    } finally {
      if (interrupted) Thread.currentThread().interrupt();
    }

    return srtpTransformer;
  }
示例#8
0
    void start() {
      if (timeoutThread != null) {
        throw new IllegalStateException();
      }

      timeoutThread =
          new Thread(
              new Runnable() {
                @Override
                public void run() {
                  expireLoop();
                }
              },
              "FocusExpireThread");

      enabled = true;

      timeoutThread.start();
    }
示例#9
0
  /**
   * Makes home folder and the configuration file readable and writable only to the owner.
   *
   * @param cs the <tt>ConfigurationService</tt> instance to check for home folder and configuration
   *     file.
   */
  private static void fixPermissions(ConfigurationService cs) {
    if (!OSUtils.IS_LINUX && !OSUtils.IS_MAC) return;

    try {
      // let's check config file and config folder
      File homeFolder = new File(cs.getScHomeDirLocation(), cs.getScHomeDirName());
      Set<PosixFilePermission> perms =
          new HashSet<PosixFilePermission>() {
            {
              add(PosixFilePermission.OWNER_READ);
              add(PosixFilePermission.OWNER_WRITE);
              add(PosixFilePermission.OWNER_EXECUTE);
            }
          };
      Files.setPosixFilePermissions(Paths.get(homeFolder.getAbsolutePath()), perms);

      String fileName = cs.getConfigurationFilename();
      if (fileName != null) {
        File cf = new File(homeFolder, fileName);
        if (cf.exists()) {
          perms =
              new HashSet<PosixFilePermission>() {
                {
                  add(PosixFilePermission.OWNER_READ);
                  add(PosixFilePermission.OWNER_WRITE);
                }
              };
          Files.setPosixFilePermissions(Paths.get(cf.getAbsolutePath()), perms);
        }
      }
    } catch (Throwable t) {
      logger.error("Error creating c lib instance for fixing file permissions", t);

      if (t instanceof InterruptedException) Thread.currentThread().interrupt();
      else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
    }
  }
示例#10
0
  /** Starts this <tt>PacketTransformer</tt>. */
  private synchronized void start() {
    if (this.datagramTransport != null) {
      if (this.connectThread == null && dtlsTransport == null) {
        logger.warn(
            getClass().getName()
                + " has been started but has failed to establish"
                + " the DTLS connection!");
      }
      return;
    }

    if (rtcpmux && Component.RTCP == componentID) {
      // In the case of rtcp-mux, the RTCP transformer does not create
      // a DTLS session. The SRTP context (_srtpTransformer) will be
      // initialized on demand using initializeSRTCPTransformerFromRtp().
      return;
    }

    AbstractRTPConnector connector = this.connector;

    if (connector == null) throw new NullPointerException("connector");

    DtlsControl.Setup setup = this.setup;
    SecureRandom secureRandom = DtlsControlImpl.createSecureRandom();
    final DTLSProtocol dtlsProtocolObj;
    final TlsPeer tlsPeer;

    if (DtlsControl.Setup.ACTIVE.equals(setup)) {
      dtlsProtocolObj = new DTLSClientProtocol(secureRandom);
      tlsPeer = new TlsClientImpl(this);
    } else {
      dtlsProtocolObj = new DTLSServerProtocol(secureRandom);
      tlsPeer = new TlsServerImpl(this);
    }
    tlsPeerHasRaisedCloseNotifyWarning = false;

    final DatagramTransportImpl datagramTransport = new DatagramTransportImpl(componentID);

    datagramTransport.setConnector(connector);

    Thread connectThread =
        new Thread() {
          @Override
          public void run() {
            try {
              runInConnectThread(dtlsProtocolObj, tlsPeer, datagramTransport);
            } finally {
              if (Thread.currentThread().equals(DtlsPacketTransformer.this.connectThread)) {
                DtlsPacketTransformer.this.connectThread = null;
              }
            }
          }
        };

    connectThread.setDaemon(true);
    connectThread.setName(DtlsPacketTransformer.class.getName() + ".connectThread");

    this.connectThread = connectThread;
    this.datagramTransport = datagramTransport;

    boolean started = false;

    try {
      connectThread.start();
      started = true;
    } finally {
      if (!started) {
        if (connectThread.equals(this.connectThread)) this.connectThread = null;
        if (datagramTransport.equals(this.datagramTransport)) this.datagramTransport = null;
      }
    }

    notifyAll();
  }
示例#11
0
  /**
   * Runs in {@link #connectThread} to initialize {@link #dtlsTransport}.
   *
   * @param dtlsProtocol
   * @param tlsPeer
   * @param datagramTransport
   */
  private void runInConnectThread(
      DTLSProtocol dtlsProtocol, TlsPeer tlsPeer, DatagramTransport datagramTransport) {
    DTLSTransport dtlsTransport = null;
    final boolean srtp = !transformEngine.isSrtpDisabled();
    int srtpProtectionProfile = 0;
    TlsContext tlsContext = null;

    // DTLS client
    if (dtlsProtocol instanceof DTLSClientProtocol) {
      DTLSClientProtocol dtlsClientProtocol = (DTLSClientProtocol) dtlsProtocol;
      TlsClientImpl tlsClient = (TlsClientImpl) tlsPeer;

      for (int i = CONNECT_TRIES - 1; i >= 0; i--) {
        if (!enterRunInConnectThreadLoop(i, datagramTransport)) break;
        try {
          dtlsTransport = dtlsClientProtocol.connect(tlsClient, datagramTransport);
          break;
        } catch (IOException ioe) {
          if (!handleRunInConnectThreadException(
              ioe, "Failed to connect this DTLS client to a DTLS" + " server!", i)) {
            break;
          }
        }
      }
      if (dtlsTransport != null && srtp) {
        srtpProtectionProfile = tlsClient.getChosenProtectionProfile();
        tlsContext = tlsClient.getContext();
      }
    }
    // DTLS server
    else if (dtlsProtocol instanceof DTLSServerProtocol) {
      DTLSServerProtocol dtlsServerProtocol = (DTLSServerProtocol) dtlsProtocol;
      TlsServerImpl tlsServer = (TlsServerImpl) tlsPeer;

      for (int i = CONNECT_TRIES - 1; i >= 0; i--) {
        if (!enterRunInConnectThreadLoop(i, datagramTransport)) break;
        try {
          dtlsTransport = dtlsServerProtocol.accept(tlsServer, datagramTransport);
          break;
        } catch (IOException ioe) {
          if (!handleRunInConnectThreadException(
              ioe, "Failed to accept a connection from a DTLS client!", i)) {
            break;
          }
        }
      }
      if (dtlsTransport != null && srtp) {
        srtpProtectionProfile = tlsServer.getChosenProtectionProfile();
        tlsContext = tlsServer.getContext();
      }
    } else {
      // It MUST be either a DTLS client or a DTLS server.
      throw new IllegalStateException("dtlsProtocol");
    }

    SinglePacketTransformer srtpTransformer =
        (dtlsTransport == null || !srtp)
            ? null
            : initializeSRTPTransformer(srtpProtectionProfile, tlsContext);
    boolean closeSRTPTransformer;

    synchronized (this) {
      if (Thread.currentThread().equals(this.connectThread)
          && datagramTransport.equals(this.datagramTransport)) {
        this.dtlsTransport = dtlsTransport;
        _srtpTransformer = srtpTransformer;
        notifyAll();
      }
      closeSRTPTransformer = (_srtpTransformer != srtpTransformer);
    }
    if (closeSRTPTransformer && srtpTransformer != null) srtpTransformer.close();
  }