/// <summary>
/// Constructor.
/// </summary>
/// <remarks>
/// The constructor creates a dictionary of each presentation context negotiated for the
/// association, and the plugin that will handle it. This is used later when incoming request
/// messages are processed.
/// </remarks>
/// <param name="server">The server.</param>
/// <param name="parameters">Association parameters for the negotiated association.</param>
/// <param name="userParms">User parameters to be passed to the plugins called by the class.</param>
/// <param name="verifier">Delegate to call to verify an association before its accepted.</param>
/// <param name="complete">Delegate to call when the association is closed/complete. Can be null.</param>
public DicomScpHandler(DicomServer server, ServerAssociationParameters parameters, TContext userParms, DicomScp <TContext> .AssociationVerifyCallback verifier, DicomScp <TContext> .AssociationComplete complete)
{
_context = userParms;
_verifier = verifier;
_complete = complete;
var ep = new DicomScpExtensionPoint <TContext>();
object[] scps = ep.CreateExtensions();
// First set the user parms for each of the extensions before we do anything with them.
foreach (object obj in scps)
{
var scp = obj as IDicomScp <TContext>;
if (scp != null)
{
scp.SetContext(_context);
}
}
// Now, create a dictionary with the extension to be used for each presentation context.
foreach (byte pcid in parameters.GetPresentationContextIDs())
{
if (parameters.GetPresentationContextResult(pcid) == DicomPresContextResult.Accept)
{
SopClass acceptedSop = SopClass.GetSopClass(parameters.GetAbstractSyntax(pcid).UID);
TransferSyntax acceptedSyntax = parameters.GetAcceptedTransferSyntax(pcid);
foreach (object obj in scps)
{
var scp = obj as IDicomScp <TContext>;
if (scp == null)
{
continue;
}
IList <SupportedSop> sops = scp.GetSupportedSopClasses();
foreach (SupportedSop sop in sops)
{
if (sop.SopClass.Equals(acceptedSop))
{
if (sop.SyntaxList.Contains(acceptedSyntax))
{
if (!_extensionList.ContainsKey(pcid))
{
_extensionList.Add(pcid, scp);
break;
}
Platform.Log(LogLevel.Error, "SOP Class {0} supported by more than one extension", sop.SopClass.Name);
}
}
}
}
}
}
_statsRecorder = new AssociationStatisticsRecorder(server);
}
/// <summary>
/// Constructor.
/// </summary>
/// <remarks>
/// The constructor creates a dictionary of each presentation context negotiated for the
/// association, and the plugin that will handle it. This is used later when incoming request
/// messages are processed.
/// </remarks>
/// <param name="server">The server.</param>
/// <param name="parameters">Association parameters for the negotiated association.</param>
/// <param name="userParms">User parameters to be passed to the plugins called by the class.</param>
/// <param name="verifier">Delegate to call to verify an association before its accepted.</param>
/// <param name="complete">Delegate to call when the association is closed/complete. Can be null.</param>
public DicomScpHandler(DicomServer server, ServerAssociationParameters parameters, TContext userParms, DicomScp <TContext> .AssociationVerifyCallback verifier, DicomScp <TContext> .AssociationComplete complete)
{
_context = userParms;
_verifier = verifier;
_complete = complete;
List <IDicomScp <TContext> > scps =
Platform.Instance.CompositionContainer.GetExportedValues <IDicomScp <TContext> >().Select(scp => scp).
ToList();
// First set the user parms for each of the extensions before we do anything with them.
foreach (object obj in scps)
{
IDicomScp <TContext> scp = obj as IDicomScp <TContext>;
scp.SetContext(_context);
}
// Now, create a dictionary with the extension to be used for each presentation context.
foreach (byte pcid in parameters.GetPresentationContextIDs())
{
if (parameters.GetPresentationContextResult(pcid) == DicomPresContextResult.Accept)
{
SopClass acceptedSop = SopClass.GetSopClass(parameters.GetAbstractSyntax(pcid).UID);
TransferSyntax acceptedSyntax = parameters.GetAcceptedTransferSyntax(pcid);
foreach (object obj in scps)
{
IDicomScp <TContext> scp = obj as IDicomScp <TContext>;
IList <SupportedSop> sops = scp.GetSupportedSopClasses();
foreach (SupportedSop sop in sops)
{
if (sop.SopClass.Equals(acceptedSop))
{
if (sop.SyntaxList.Contains(acceptedSyntax))
{
if (!_extensionList.ContainsKey(pcid))
{
_extensionList.Add(pcid, scp);
break;
}
else
{
LogAdapter.Logger.ErrorWithFormat("SOP Class {0} supported by more than one extension", sop.SopClass.Name);
}
}
}
}
}
}
}
}
void IDicomServerHandler.OnReceiveAssociateRequest(DicomServer server, ServerAssociationParameters association)
{
if (_verifier != null)
{
DicomRejectResult result;
DicomRejectReason reason;
bool verified = _verifier(_context, association, out result, out reason);
if (verified == false)
{
server.SendAssociateReject(result, DicomRejectSource.ServiceUser, reason);
LogAdapter.Logger.Info("Association rejected from {0} to {1}",
association.CallingAE, association.CalledAE);
return;
}
}
// Let the extensions have its say on whether a presentation context is really acceptable.
//
bool atLeastOneAccepted = false;
foreach (byte pcid in association.GetPresentationContextIDs())
{
if (association.GetPresentationContextResult(pcid) == DicomPresContextResult.Accept)
{
IDicomScp <TContext> scp = _extensionList[pcid];
DicomPresContextResult res = scp.VerifyAssociation(association, pcid);
if (res != DicomPresContextResult.Accept)
{
association.GetPresentationContext(pcid).ClearTransfers();
association.SetPresentationContextResult(pcid, res);
}
else
{
atLeastOneAccepted = true;
}
}
}
if (!atLeastOneAccepted)
{
LogAdapter.Logger.Info("None of the proposed presentation context is accepted. Rejecting association from {0} to {1}", association.CallingAE, association.CalledAE);
server.SendAssociateReject(DicomRejectResult.Permanent, DicomRejectSource.ServiceUser, DicomRejectReason.NoReasonGiven);
return;
}
server.SendAssociateAccept(association);
// Optimization to speed query performance
Task.Factory.StartNew(() => LogAdapter.Logger.Info("Received association:\r\n{0}", association.ToString()));
}