/**
   * Creates and sends a SUBSCRIBE request to the subscription <tt>Address</tt>/Request URI of a
   * specific <tt>Subscription</tt> in order to request receiving event notifications and adds the
   * specified <tt>Subscription</tt> to the list of subscriptions managed by this instance. The
   * added <tt>Subscription</tt> may later receive notifications to process the <tt>Request</tt>s
   * and/or <tt>Response</tt>s which constitute the signaling session associated with it. If the
   * attempt to create and send the SUBSCRIBE request fails, the specified <tt>Subscription</tt> is
   * not added to the list of subscriptions managed by this instance.
   *
   * @param subscription a <tt>Subscription</tt> which specifies the properties of the SUBSCRIBE
   *     request to be created and sent, to be added to the list of subscriptions managed by this
   *     instance
   * @throws OperationFailedException if we fail constructing or sending the subscription request.
   */
  public void subscribe(Subscription subscription) throws OperationFailedException {
    Dialog dialog = subscription.getDialog();

    if ((dialog != null) && DialogState.TERMINATED.equals(dialog.getState())) dialog = null;

    // create the subscription
    ClientTransaction subscribeTransaction = null;
    try {
      subscribeTransaction =
          (dialog == null)
              ? createSubscription(subscription, subscriptionDuration)
              : createSubscription(subscription, dialog, subscriptionDuration);
    } catch (OperationFailedException ex) {
      ProtocolProviderServiceSipImpl.throwOperationFailedException(
          "Failed to create the subscription", OperationFailedException.INTERNAL_ERROR, ex, logger);
    }

    // we register the contact to find him when the OK will arrive
    CallIdHeader callIdHeader =
        (CallIdHeader) subscribeTransaction.getRequest().getHeader(CallIdHeader.NAME);
    String callId = callIdHeader.getCallId();
    addSubscription(callId, subscription);

    // send the message
    try {
      if (dialog == null) subscribeTransaction.sendRequest();
      else dialog.sendRequest(subscribeTransaction);
    } catch (SipException ex) {
      // this contact will never been accepted or rejected
      removeSubscription(callId, subscription);

      ProtocolProviderServiceSipImpl.throwOperationFailedException(
          "Failed to send the subscription", OperationFailedException.NETWORK_FAILURE, ex, logger);
    }
  }
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  /**
   * Creates a new instance of this class using the specified parent <tt>protocolProvider</tt>.
   *
   * @param protocolProvider a reference to the <tt>ProtocolProviderServiceSipImpl</tt> instance
   *     that created us.
   */
  public ClientCapabilities(ProtocolProviderServiceSipImpl protocolProvider) {
    this.provider = protocolProvider;

    provider.registerMethodProcessor(Request.OPTIONS, this);

    registrationListener = new RegistrationListener();
    provider.addRegistrationStateChangeListener(registrationListener);
  }
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  /** Fire event that connection has failed and we had to unregister the protocol provider. */
  private void disconnect() {
    // don't alert the user if we're already off
    if (provider.getRegistrationState().equals(RegistrationState.UNREGISTERED)) {
      return;
    }

    provider
        .getRegistrarConnection()
        .setRegistrationState(
            RegistrationState.CONNECTION_FAILED,
            RegistrationStateChangeEvent.REASON_NOT_SPECIFIED,
            "A timeout occurred while trying to connect to the server.");
  }
  /**
   * Creates an instance of this operation set.
   *
   * @param provider a ref to the <tt>ProtocolProviderServiceImpl</tt> that created us and that
   *     we'll use for retrieving the underlying aim connection.
   */
  OperationSetBasicInstantMessagingSipImpl(ProtocolProviderServiceSipImpl provider) {
    this.sipProvider = provider;

    provider.addRegistrationStateChangeListener(new RegistrationStateListener());

    offlineMessageSupported =
        provider.getAccountID().getAccountPropertyBoolean("OFFLINE_MSG_SUPPORTED", false);

    sipProvider.registerMethodProcessor(
        Request.MESSAGE, new BasicInstantMessagingMethodProcessor());

    this.sipStatusEnum = sipProvider.getSipStatusEnum();
  }
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  /**
   * Receives options requests and replies with an OK response containing methods that we support.
   *
   * @param requestEvent the incoming options request.
   * @return <tt>true</tt> if request has been successfully processed, <tt>false</tt> otherwise
   */
  @Override
  public boolean processRequest(RequestEvent requestEvent) {
    Response optionsOK = null;
    try {
      optionsOK =
          provider.getMessageFactory().createResponse(Response.OK, requestEvent.getRequest());

      // add to the allows header all methods that we support
      for (String method : provider.getSupportedMethods()) {
        // don't support REGISTERs
        if (!method.equals(Request.REGISTER))
          optionsOK.addHeader(provider.getHeaderFactory().createAllowHeader(method));
      }

      Iterable<String> knownEventsList = provider.getKnownEventsList();

      synchronized (knownEventsList) {
        for (String event : knownEventsList)
          optionsOK.addHeader(provider.getHeaderFactory().createAllowEventsHeader(event));
      }
    } catch (ParseException ex) {
      // What else could we do apart from logging?
      logger.warn("Failed to create an incoming OPTIONS request", ex);
      return false;
    }

    try {
      SipStackSharing.getOrCreateServerTransaction(requestEvent).sendResponse(optionsOK);
    } catch (TransactionUnavailableException ex) {
      // this means that we received an OPTIONS request outside the scope
      // of a transaction which could mean that someone is simply sending
      // us b****hit to keep a NAT connection alive, so let's not get too
      // excited.
      if (logger.isInfoEnabled())
        logger.info("Failed to respond to an incoming " + "transactionless OPTIONS request");
      if (logger.isTraceEnabled()) logger.trace("Exception was:", ex);
      return false;
    } catch (InvalidArgumentException ex) {
      // What else could we do apart from logging?
      logger.warn("Failed to send an incoming OPTIONS request", ex);
      return false;
    } catch (SipException ex) {
      // What else could we do apart from logging?
      logger.warn("Failed to send an incoming OPTIONS request", ex);
      return false;
    }

    return true;
  }
  /**
   * Initializes a new <tt>EventPackageSubscriber</tt> instance which is to provide subscriber
   * support according to RFC 3265 to a specific SIP <tt>ProtocolProviderService</tt> implementation
   * for a specific event package.
   *
   * @param protocolProvider the SIP <tt>ProtocolProviderService</tt> implementation for which the
   *     new instance is to provide subscriber support for a specific event package
   * @param eventPackage the name of the event package the new instance is to implement and carry in
   *     the Event and Allow-Events headers
   * @param subscriptionDuration the duration of each subscription to be managed by the new instance
   *     and to be carried in the Expires headers
   * @param contentSubType the sub-type of the content type of the NOTIFY bodies to be announced,
   *     expected and supported by the subscriptions to be managed by the new instance
   * @param timer the <tt>Timer</tt> support which is to refresh the subscriptions to be managed by
   *     the new instance
   * @param refreshMargin the number of seconds before a subscription to be managed by the new
   *     instance expires that the new instance should attempt to refresh it
   */
  public EventPackageSubscriber(
      ProtocolProviderServiceSipImpl protocolProvider,
      String eventPackage,
      int subscriptionDuration,
      String contentSubType,
      TimerScheduler timer,
      int refreshMargin) {
    super(protocolProvider, eventPackage, subscriptionDuration, contentSubType, timer);

    this.refreshMargin = refreshMargin;
    this.messageFactory = protocolProvider.getMessageFactory();
  }
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 /** Frees allocated resources. */
 void shutdown() {
   provider.removeRegistrationStateChangeListener(registrationListener);
 }
  /**
   * Construct a <tt>Request</tt> represent a new message.
   *
   * @param to the <tt>Contact</tt> to send <tt>message</tt> to
   * @param message the <tt>Message</tt> to send.
   * @return a Message Request destined to the contact
   * @throws OperationFailedException if an error occurred during the creation of the request
   */
  Request createMessageRequest(Contact to, Message message) throws OperationFailedException {
    Address toAddress = null;
    try {
      toAddress = sipProvider.parseAddressString(to.getAddress());
    } catch (ParseException exc) {
      // Shouldn't happen
      logger.error("An unexpected error occurred while" + "constructing the address", exc);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the address",
          OperationFailedException.INTERNAL_ERROR,
          exc);
    }

    // Call ID
    CallIdHeader callIdHeader = this.sipProvider.getDefaultJainSipProvider().getNewCallId();

    // CSeq
    CSeqHeader cSeqHeader = null;

    try {
      // protect seqN
      synchronized (this) {
        cSeqHeader = this.sipProvider.getHeaderFactory().createCSeqHeader(seqN++, Request.MESSAGE);
      }
    } catch (InvalidArgumentException ex) {
      // Shouldn't happen
      logger.error("An unexpected error occurred while" + "constructing the CSeqHeadder", ex);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the CSeqHeadder",
          OperationFailedException.INTERNAL_ERROR,
          ex);
    } catch (ParseException exc) {
      // shouldn't happen
      logger.error("An unexpected error occurred while" + "constructing the CSeqHeadder", exc);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the CSeqHeadder",
          OperationFailedException.INTERNAL_ERROR,
          exc);
    }

    // FromHeader and ToHeader
    String localTag = SipMessageFactory.generateLocalTag();
    FromHeader fromHeader = null;
    ToHeader toHeader = null;
    try {
      // FromHeader
      fromHeader =
          this.sipProvider
              .getHeaderFactory()
              .createFromHeader(sipProvider.getOurSipAddress(toAddress), localTag);

      // ToHeader
      toHeader = this.sipProvider.getHeaderFactory().createToHeader(toAddress, null);
    } catch (ParseException ex) {
      // these two should never happen.
      logger.error(
          "An unexpected error occurred while" + "constructing the FromHeader or ToHeader", ex);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the FromHeader or ToHeader",
          OperationFailedException.INTERNAL_ERROR,
          ex);
    }

    // ViaHeaders
    ArrayList<ViaHeader> viaHeaders = this.sipProvider.getLocalViaHeaders(toAddress);

    // MaxForwards
    MaxForwardsHeader maxForwards = this.sipProvider.getMaxForwardsHeader();

    // Content params
    ContentTypeHeader contTypeHeader;
    ContentLengthHeader contLengthHeader;
    try {
      contTypeHeader =
          this.sipProvider
              .getHeaderFactory()
              .createContentTypeHeader(getType(message), getSubType(message));

      if (!DEFAULT_MIME_ENCODING.equalsIgnoreCase(message.getEncoding()))
        contTypeHeader.setParameter("charset", message.getEncoding());

      contLengthHeader =
          this.sipProvider.getHeaderFactory().createContentLengthHeader(message.getSize());
    } catch (ParseException ex) {
      // these two should never happen.
      logger.error("An unexpected error occurred while" + "constructing the content headers", ex);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the content headers",
          OperationFailedException.INTERNAL_ERROR,
          ex);
    } catch (InvalidArgumentException exc) {
      // these two should never happen.
      logger.error(
          "An unexpected error occurred while" + "constructing the content length header", exc);
      throw new OperationFailedException(
          "An unexpected error occurred while" + "constructing the content length header",
          OperationFailedException.INTERNAL_ERROR,
          exc);
    }

    Request req;
    try {
      req =
          this.sipProvider
              .getMessageFactory()
              .createRequest(
                  toHeader.getAddress().getURI(),
                  Request.MESSAGE,
                  callIdHeader,
                  cSeqHeader,
                  fromHeader,
                  toHeader,
                  viaHeaders,
                  maxForwards,
                  contTypeHeader,
                  message.getRawData());
    } catch (ParseException ex) {
      // shouldn't happen
      logger.error("Failed to create message Request!", ex);
      throw new OperationFailedException(
          "Failed to create message Request!", OperationFailedException.INTERNAL_ERROR, ex);
    }

    req.addHeader(contLengthHeader);

    return req;
  }