private void doProcessPacket(Packet packet) {
      final Message message = ((Message) packet);
      if (message.getType() == Message.Type.ERROR) {
        UIUtil.invokeLater(
            () -> {
              String from =
                  (message.getFrom() != null) ? getMsg("from.0.lf", message.getFrom()) : "";
              LOG.warn(
                  getMsg(
                      "jabber.error.text",
                      from,
                      (message.getError() == null ? "N/A" : message.getError().toString())));
            });
        return;
      }

      if (myIgnoreList.isIgnored(packet.getFrom())) {
        return;
      }

      Element element = null;
      for (PacketExtension o : message.getExtensions()) {
        if (o instanceof JDOMExtension) {
          element = ((JDOMExtension) o).getElement();
        }
      }

      if (element != null && !RESPONSE.equals(element.getName())) {
        processAndSendResponse(element, message);
      } else if (element == null && message.getBody() != null) {
        // Some simple Jabber Message
        MessageEvent event =
            EventFactory.createMessageEvent(
                JabberTransport.this, getFrom(message), message.getBody());
        if (message.getThread() != null) {
          myUser2Thread.put(getFrom(message), message.getThread());
        }

        getBroadcaster().fireEvent(event);
      }
    }
  /** Handles XEP-0337 "log" extensions. */
  private void handleLogRequest(LogPacketExtension log, String jid) {
    JitsiMeetConference conference = getConferenceForMucJid(jid);

    if (conference == null) {
      logger.debug("Room not found for JID: " + jid);
      return;
    }

    Participant participant = conference.findParticipantForRoomJid(jid);

    if (participant == null) {
      logger.info("Ignoring log request from an unknown JID: " + jid);
      return;
    }

    EventAdmin eventAdmin = FocusBundleActivator.getEventAdmin();

    if (eventAdmin == null) return;

    if (LogUtil.LOG_ID_PC_STATS.equals(log.getID())) {
      String content = LogUtil.getContent(log);

      if (content != null) {
        ColibriConference colibriConference = conference.getColibriConference();

        if (colibriConference != null) {
          Event event =
              EventFactory.peerConnectionStats(
                  colibriConference.getConferenceId(), participant.getEndpointId(), content);

          if (event != null) eventAdmin.sendEvent(event);
        } else {
          logger.warn("Unhandled log request" + " - no valid Colibri conference");
        }
      }
    } else if (logger.isInfoEnabled()) {
      logger.info("Ignoring log request with an unknown ID:" + log.getID());
    }
  }
  /**
   * Handles presence stanzas
   *
   * @param presence
   */
  private void handlePresence(Presence presence) {
    // unavailable is sent when user leaves the room
    if (!presence.isAvailable()) {
      return;
    }

    String from = presence.getFrom();
    JitsiMeetConference conference = getConferenceForMucJid(from);

    if (conference == null) {
      if (logger.isDebugEnabled()) {
        logger.debug("Room not found for JID: " + from);
      }
      return;
    }

    ChatRoomMemberRole role = conference.getRoleForMucJid(from);

    if (role != null && role.compareTo(ChatRoomMemberRole.MODERATOR) < 0) {
      StartMutedPacketExtension ext =
          (StartMutedPacketExtension)
              presence.getExtension(
                  StartMutedPacketExtension.ELEMENT_NAME, StartMutedPacketExtension.NAMESPACE);

      if (ext != null) {
        boolean[] startMuted = {ext.getAudioMuted(), ext.getVideoMuted()};

        conference.setStartMuted(startMuted);
      }
    }

    Participant participant = conference.findParticipantForRoomJid(from);
    ColibriConference colibriConference = conference.getColibriConference();

    if (participant != null && colibriConference != null) {
      // Check if this conference is valid
      String conferenceId = colibriConference.getConferenceId();
      if (StringUtils.isNullOrEmpty(conferenceId)) {
        logger.error("Unable to send DisplayNameChanged event" + " - no conference id");
        return;
      }

      // Check for changes to the display name
      String oldDisplayName = participant.getDisplayName();
      String newDisplayName = null;
      for (PacketExtension pe : presence.getExtensions()) {
        if (pe instanceof Nick) {
          newDisplayName = ((Nick) pe).getName();
          break;
        }
      }

      if (!Objects.equals(oldDisplayName, newDisplayName)) {
        participant.setDisplayName(newDisplayName);

        EventAdmin eventAdmin = FocusBundleActivator.getEventAdmin();
        if (eventAdmin != null) {
          // Prevent NPE when adding to event hashtable
          if (newDisplayName == null) {
            newDisplayName = "";
          }
          eventAdmin.sendEvent(
              EventFactory.endpointDisplayNameChanged(
                  conferenceId, participant.getEndpointId(), newDisplayName));
        }
      }
    }
  }