/// <summary>
/// Determines if the first received DicomMessage in a DicomThread instance has an explicit transfer syntax.
/// </summary>
/// <param name="dicomThread">The DicomThread.</param>
/// <returns>Boolean indicating if the first received DicomMessage has an explicit transfer syntax.</returns>
private bool IsDataTransferExplicit(DicomThread dicomThread)
{
bool isDataTransferExplicit = true;
if ((dicomThread.Messages.ReceivedMessages.DicomMessages.Count > 0))
{
DicomMessage firstReceivedDicomMessage = dicomThread.Messages.ReceivedMessages.DicomMessages[0];
byte presentationContextIdFirstReceivedDicomMessage = firstReceivedDicomMessage.EncodedPresentationContextID;
AssociateAc firstReceivedAssociateAc = null;
foreach (DulMessage dulMessage in dicomThread.Messages.SendMessages.DulMessages)
{
if (dulMessage is AssociateAc)
{
firstReceivedAssociateAc = dulMessage as AssociateAc;
break;
}
}
if (firstReceivedAssociateAc != null)
{
foreach (PresentationContext presentationContext in firstReceivedAssociateAc.PresentationContexts)
{
if (presentationContext.ID == presentationContextIdFirstReceivedDicomMessage)
{
String transferSyntax = presentationContext.TransferSyntax;
if (transferSyntax == "1.2.840.10008.1.2")
{
isDataTransferExplicit = false;
}
else
{
isDataTransferExplicit = true;
}
}
}
}
}
return(isDataTransferExplicit);
}
/// <summary>
/// Override this method to handle an A-ASSOCIATE-AC.
/// </summary>
/// <param name="associateAc">The received A-ASSOCIATE-AC.</param>
/// <returns>Return true when this methods has handled the received A-ASSOCIATE-AC, otherwise false.</returns>
public virtual bool HandleAssociateAccept(AssociateAc associateAc)
{
return false;
}
/// <summary>
/// This method is called after an A-ASSOCIATE-AC has been received but before it
/// (possibly) will be handled by the (zero or more) MessageHandler objects that
/// are attached to this object.
///
/// Default, nothing is done in this method. Override if needed.
/// </summary>
/// <param name="associateAc">The received A-ASSOCIATE-AC</param>
public virtual void BeforeHandlingAssociateAccept(AssociateAc associateAc)
{
// Do nothing.
}
/// <summary>
/// This method is called after an A-ASSOCIATE-AC has been received and has
/// (possibly) been handled by the (zero or more) MessageHandler objects that
/// are attached to this object.
///
/// Default, nothing is done in this method. Override if needed.
/// </summary>
/// <param name="associateAc">The received A-ASSOCIATE-AC.</param>
public virtual void AfterHandlingAssociateAccept(AssociateAc associateAc)
{
// Do nothing.
}
private void SendMessage(DulMessage dulMessage)
{
//
// Administration.
//
dulMessage.IsSend = true;
AddMessage(dulMessage);
if (SendingMessageEvent != null)
{
SendingMessageEvent(dulMessage);
}
//
// Perform the actual sending.
//
Dvtk.Sessions.SendReturnCode sendReturnCode = Dvtk.Sessions.SendReturnCode.Failure;
sendReturnCode = DvtkScriptSession.Send(dulMessage.DvtkDataDulMessage);
//
// If an error is encountered while sending, throw an exception.
//
if (sendReturnCode != Dvtk.Sessions.SendReturnCode.Success)
{
throw new DicomProtocolMessageSendException("Error while trying to send a " + dulMessage.ToString() + " (" + sendReturnCode.ToString() + ")", sendReturnCode);
}
if (dulMessage is AssociateAc)
{
this.lastAssociateAc = dulMessage as AssociateAc;
}
}
/// <summary>
/// Receives a messages (can be a Dicom or Dul message).
/// </summary>
/// <param name="messageToExpect">Message to expect that is written in the results.</param>
/// <returns>The received message.</returns>
/// <exception cref="DicomProtocolMessageReceiveException">
/// Receiving of a message fails.
/// </exception>
private DicomProtocolMessage ReceiveMessage(String messageToExpect)
{
DicomProtocolMessage receivedMessage = null;
DvtkData.Message dvtkDataMessage = null;
if (this.hasOpenConnection)
{
if (messageToExpect == "")
{
WriteInformation("Receiving message...");
}
else
{
WriteInformation("Receiving message (expecting " + messageToExpect + ")...");
}
}
else
{
WriteInformation(String.Format("Listening for incoming Dicom connection on port {0}...", Options.LocalPort));
}
Dvtk.Sessions.ReceiveReturnCode receiveReturnCode = DvtkScriptSession.Receive(out dvtkDataMessage);
if (receiveReturnCode != Dvtk.Sessions.ReceiveReturnCode.Success)
{
throw new DicomProtocolMessageReceiveException("Error while trying to receive a Message. Error code " + receiveReturnCode.ToString() + ".", receiveReturnCode);
}
else
{
if (dvtkDataMessage is DvtkData.Dimse.DicomMessage)
{
DicomMessage receivedDicomMessage = new DicomMessage(dvtkDataMessage as DvtkData.Dimse.DicomMessage);
// Apply the inbound DicomMessage filters if this is a DicomMessage.
foreach (InboundDicomMessageFilter inboundDicomMessageFilter in this.inboundDicomMessageFilters)
{
inboundDicomMessageFilter.Apply(receivedDicomMessage);
}
receivedMessage = receivedDicomMessage;
}
else if (dvtkDataMessage is DvtkData.Dul.A_ASSOCIATE_RQ)
{
receivedMessage = new AssociateRq(dvtkDataMessage as DvtkData.Dul.A_ASSOCIATE_RQ);
hasOpenConnection = true;
}
else if (dvtkDataMessage is DvtkData.Dul.A_ASSOCIATE_AC)
{
receivedMessage = new AssociateAc(dvtkDataMessage as DvtkData.Dul.A_ASSOCIATE_AC);
this.lastAssociateAc = receivedMessage as AssociateAc;
}
else if (dvtkDataMessage is DvtkData.Dul.A_ASSOCIATE_RJ)
{
receivedMessage = new AssociateRj(dvtkDataMessage as DvtkData.Dul.A_ASSOCIATE_RJ);
hasOpenConnection = false;
}
else if (dvtkDataMessage is DvtkData.Dul.A_RELEASE_RQ)
{
receivedMessage = new ReleaseRq(dvtkDataMessage as DvtkData.Dul.A_RELEASE_RQ);
}
else if (dvtkDataMessage is DvtkData.Dul.A_RELEASE_RP)
{
receivedMessage = new ReleaseRp(dvtkDataMessage as DvtkData.Dul.A_RELEASE_RP);
hasOpenConnection = false;
}
else if (dvtkDataMessage is DvtkData.Dul.A_ABORT)
{
receivedMessage = new Abort(dvtkDataMessage as DvtkData.Dul.A_ABORT);
hasOpenConnection = false;
}
else
{
Debug.Assert(true, "Unexpected DvtkData Message descendant type.");
}
WriteInformation("... " + receivedMessage.ToString() + " received.");
// If the options AutoValidate is true, try to validate as much
// as possible for the received message.
if (Options.AutoValidate)
{
Validate(receivedMessage);
}
MessageReceived(receivedMessage);
if (receivedMessage is ReleaseRq)
{
if (AssociationReleasedEvent != null)
{
AssociationReleasedEvent(this);
}
}
}
return (receivedMessage);
}
/// <summary>
/// Sends an A-ASSOCIATE-AC based on the supplied presentation contexts.
/// </summary>
/// <remarks>
/// Any requested presentation context that has no counterpart in the supplied presentation
/// contexts will automaticaly be added to the A-ASSOCIATE-AC with the presentation context rejected.<br></br><br></br>
///
/// If an A-ASSOCIATE-RJ should be sent when none of the requested presentation contexts is accepted,
/// use the <see cref="SendAssociateRp(PresentationContextCollection)"/> method instead.
/// </remarks>
/// <param name="presentationContextCollection">The presentation contexts.</param>
/// <returns>The sent AssociateAc.</returns>
protected internal AssociateAc SendAssociateAc(PresentationContextCollection presentationContextCollection)
{
//
// Check the parameter(s).
//
foreach(PresentationContext presentationContext in presentationContextCollection)
{
if (!presentationContext.IsForAssociateAccept)
{
throw new System.Exception("PresentationContext instance supplied that is not suitable for an A-ASSOCIATE-AC.");
}
}
//
// Construct the AssociateAc instance.
//
AssociateAc associateAc = new AssociateAc
(Options.RemoteAeTitle,
Options.LocalAeTitle,
Options.LocalMaximumLength,
Options.LocalImplementationClassUid,
Options.LocalImplementationVersionName);
foreach(PresentationContext presentationContext in presentationContextCollection)
{
associateAc.DvtkDataAssociateAc.AddPresentationContexts(presentationContext.DvtkDataAcceptedPresentationContext);
}
//
// Send the A-ASSOCIATE-AC.
//
SendMessage(associateAc);
return(associateAc);
}
