public Task OnReceiveAssociationRequestAsync(FoDicomNetwork.DicomAssociation association)
{
_associationDataProvider = UserState as IApplicationEntityManager;
if (_associationDataProvider is null)
{
throw new ArgumentNullException("userState must be an instance of IAssociationDataProvider");
}
_logger = _associationDataProvider.GetLogger <ScpServiceInternal>(Association.CalledAE);
_associationId = _associationDataProvider.NextAssociationNumber();
_associationIdStr = $"#{_associationId} {association.RemoteHost}:{association.RemotePort}";
_loggerScope = _logger?.BeginScope(new Dictionary <string, object> {
{ "Association", _associationIdStr }
});
_logger?.Log(LogLevel.Information, "Association received from {0}:{1}", association.RemoteHost, association.RemotePort);
if (!IsValidSourceAe(association.CallingAE))
{
return(SendAssociationRejectAsync(
FoDicomNetwork.DicomRejectResult.Permanent,
FoDicomNetwork.DicomRejectSource.ServiceUser,
FoDicomNetwork.DicomRejectReason.CallingAENotRecognized));
}
if (!IsValidCalledAe(association.CalledAE))
{
return(SendAssociationRejectAsync(
FoDicomNetwork.DicomRejectResult.Permanent,
FoDicomNetwork.DicomRejectSource.ServiceUser,
FoDicomNetwork.DicomRejectReason.CalledAENotRecognized));
}
foreach (var pc in association.PresentationContexts)
{
if (pc.AbstractSyntax == FoDicom.DicomUID.Verification)
{
if (!_associationDataProvider.Configuration.Value.Dicom.Scp.Verification.Enabled)
{
_logger?.Log(LogLevel.Warning, "Verification service is disabled: rejecting association");
return(SendAssociationRejectAsync(
FoDicomNetwork.DicomRejectResult.Permanent,
FoDicomNetwork.DicomRejectSource.ServiceUser,
FoDicomNetwork.DicomRejectReason.ApplicationContextNotSupported
));
}
pc.AcceptTransferSyntaxes(_associationDataProvider.Configuration.Value.Dicom.Scp.Verification.TransferSyntaxes.ToDicomTransferSyntaxArray());
}
else if (pc.AbstractSyntax.StorageCategory != FoDicom.DicomStorageCategory.None)
{
// Accept any proposed TS
pc.AcceptTransferSyntaxes(pc.GetTransferSyntaxes().ToArray());
}
}
return(SendAssociationAcceptAsync(association));
}
public void OnReceiveAssociationRequest(DicomAssociation association) {
foreach (var pc in association.PresentationContexts) {
if (pc.AbstractSyntax == DicomUID.Verification)
pc.SetResult(DicomPresentationContextResult.Accept);
else
pc.SetResult(DicomPresentationContextResult.RejectAbstractSyntaxNotSupported);
}
SendAssociationAccept(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
foreach (var pc in association.PresentationContexts)
{
pc.AcceptTransferSyntaxes(AcceptedImageTransferSyntaxes);
}
SendAssociationAccept(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
foreach (var pc in association.PresentationContexts)
{
if (pc.AbstractSyntax == DicomUID.Verification)
pc.AcceptTransferSyntaxes(AcceptedTransferSyntaxes);
else if (pc.AbstractSyntax.StorageCategory != DicomStorageCategory.None)
pc.AcceptTransferSyntaxes(AcceptedImageTransferSyntaxes);
}
SendAssociationAccept(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association) {
if (association.CalledAE != "STORESCP") {
SendAssociationReject(DicomRejectResult.Permanent, DicomRejectSource.ServiceUser, DicomRejectReason.CalledAENotRecognized);
return;
}
foreach (var pc in association.PresentationContexts) {
if (pc.AbstractSyntax == DicomUID.Verification)
pc.AcceptTransferSyntaxes(AcceptedTransferSyntaxes);
else if (pc.AbstractSyntax.StorageCategory != DicomStorageCategory.None)
pc.AcceptTransferSyntaxes(AcceptedImageTransferSyntaxes);
}
SendAssociationAccept(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
if (association.CalledAE != "STORESCP")
{
SendAssociationReject(DicomRejectResult.Permanent, DicomRejectSource.ServiceUser, DicomRejectReason.CalledAENotRecognized);
return;
}
foreach (var pc in association.PresentationContexts.Where(pc => pc.AbstractSyntax == DicomUID.VerificationSOPClass))
{
pc.AcceptTransferSyntaxes(new[] {
DicomTransferSyntax.ExplicitVRLittleEndian,
DicomTransferSyntax.ExplicitVRBigEndian,
DicomTransferSyntax.ImplicitVRLittleEndian
});
}
SendAssociationAccept(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
this.Logger.Info("Received association request from AE: {0} with IP: {1} ", association.CallingAE, RemoteIP);
if (Printer.PrinterAet != association.CalledAE)
{
this.Logger.Error("Association with {0} rejected since requested printer {1} not found",
association.CallingAE, association.CalledAE);
SendAssociationReject(DicomRejectResult.Permanent, DicomRejectSource.ServiceUser, DicomRejectReason.CalledAENotRecognized);
return;
}
CallingAE = association.CallingAE;
CalledAE = Printer.PrinterAet;
foreach (var pc in association.PresentationContexts)
{
if (pc.AbstractSyntax == DicomUID.Verification ||
pc.AbstractSyntax == DicomUID.BasicGrayscalePrintManagementMetaSOPClass ||
pc.AbstractSyntax == DicomUID.BasicColorPrintManagementMetaSOPClass ||
pc.AbstractSyntax == DicomUID.PrinterSOPClass ||
pc.AbstractSyntax == DicomUID.BasicFilmSessionSOPClass ||
pc.AbstractSyntax == DicomUID.BasicFilmBoxSOPClass ||
pc.AbstractSyntax == DicomUID.BasicGrayscaleImageBoxSOPClass ||
pc.AbstractSyntax == DicomUID.BasicColorImageBoxSOPClass)
{
pc.AcceptTransferSyntaxes(AcceptedTransferSyntaxes);
}
else if (pc.AbstractSyntax == DicomUID.PrintJobSOPClass)
{
pc.AcceptTransferSyntaxes(AcceptedTransferSyntaxes);
_sendEventReports = true;
}
else
{
this.Logger.Warn("Requested abstract syntax {abstractSyntax} from {callingAE} not supported", pc.AbstractSyntax, association.CallingAE);
pc.SetResult(DicomPresentationContextResult.RejectAbstractSyntaxNotSupported);
}
}
this.Logger.Info("Accepted association request from {callingAE}", association.CallingAE);
SendAssociationAccept(association);
}
public void WriteReadAAssociateRQExtendedNegotiation()
{
DicomAssociation association = new DicomAssociation("testCalling", "testCalled");
association.ExtendedNegotiations.Add(
new DicomExtendedNegotiation(
DicomUID.StudyRootQueryRetrieveInformationModelFIND,
new RootQueryRetrieveInfoFind(1, 1, 1, 1, null)));
AAssociateRQ rq = new AAssociateRQ(association);
RawPDU writePdu = rq.Write();
RawPDU readPdu;
using (MemoryStream stream = new MemoryStream())
{
writePdu.WritePDU(stream);
int length = (int)stream.Length;
byte[] buffer = new byte[length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, length);
readPdu = new RawPDU(buffer);
}
DicomAssociation testAssociation = new DicomAssociation();
AAssociateRQ rq2 = new AAssociateRQ(testAssociation);
rq2.Read(readPdu);
Assert.True(testAssociation.ExtendedNegotiations.Count == 1);
Assert.True(
testAssociation.ExtendedNegotiations[0].SopClassUid
== DicomUID.StudyRootQueryRetrieveInformationModelFIND);
RootQueryRetrieveInfoFind info =
testAssociation.ExtendedNegotiations[0].SubItem as RootQueryRetrieveInfoFind;
Assert.True(null != info);
Assert.True(
(1 == info.DateTimeMatching) && (1 == info.FuzzySemanticMatching) && (1 == info.RelationalQueries)
&& (1 == info.TimezoneQueryAdjustment) && (false == info.EnhancedMultiFrameImageConversion.HasValue));
}
//下面这部分是A-ASSOCIATE服务的相关实现，此处为了简单只实现了连接请求服务
#region ACSE-Service
//A-ASSOCIATE-RQ:
public void OnReceiveAssociationRequest(DicomAssociation association)
{
foreach (var pc in association.PresentationContexts)
{
if (pc.AbstractSyntax == DicomUID.Verification)
pc.AcceptTransferSyntaxes(AcceptedTransferSyntaxes);
else
if (pc.AbstractSyntax == DicomUID.StudyRootQueryRetrieveInformationModelFIND ||
pc.AbstractSyntax == DicomUID.StudyRootQueryRetrieveInformationModelMOVE ||
pc.AbstractSyntax == DicomUID.PatientRootQueryRetrieveInformationModelFIND ||
pc.AbstractSyntax == DicomUID.PatientRootQueryRetrieveInformationModelMOVE
)
{
//未添加Transfer Syntax限制
pc.SetResult(DicomPresentationContextResult.Accept);
}
else
if (pc.AbstractSyntax.StorageCategory != DicomStorageCategory.None)
pc.AcceptTransferSyntaxes(AcceptedImageTransferSyntaxes);
}
SendAssociationAccept(association);
}
private void EndReadPDU(IAsyncResult result) {
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0) {
// disconnected
CloseConnection(null);
return;
}
_readLength -= count;
if (_readLength > 0) {
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type) {
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName)
Logger = LogManager.Default.GetLogger(LogID);
Logger.Info("{callingAE} <- Association request:\n{association}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info("{calledAE} <- Association accept:\n{assocation}", LogID, Association.ToString());
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info("{logId} <- Association reject [result: {pduResult}; source: {pduSource}; reason: {pduReason}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
Logger.Info("{logId} <- {@pdu}", LogID, pdu);
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{logId} <- Association release request", LogID);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{logId} <- Association release response", LogID);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(null);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info("{logId} <- Abort: {pduSource} - {pduReason}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(null);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
if (e.InnerException is SocketException) {
Logger.Error("Socket error while reading PDU: {socketErrorCode} [{errorCode}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
} else if (!(e.InnerException is ObjectDisposedException))
Logger.Error("IO exception while reading PDU: {@error}", e);
CloseConnection(e);
} catch (NullReferenceException) {
// connection already closed; silently ignore
CloseConnection(null);
} catch (Exception e) {
Logger.Error("Exception processing PDU: {@error}", e);
CloseConnection(e);
}
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
Thread.Sleep(1000);
this.SendAssociationAccept(association);
}
public void OnReceiveAssociationAccept(DicomAssociation association)
{
foreach (var ctx in this.client.AdditionalPresentationContexts)
{
foreach (
var item in
association.PresentationContexts.Where(pc => pc.AbstractSyntax == ctx.AbstractSyntax))
{
ctx.SetResult(item.Result, item.AcceptedTransferSyntax);
}
}
this.client.associateNotifier.TrySetResult(true);
if (this.client.requests.Count > 0)
{
foreach (var request in this.client.requests) this.SendRequest(request);
this.client.requests.Clear();
}
else
{
this._SendAssociationReleaseRequest();
}
}
/// <summary>
/// Callback for handling association accept scenarios.
/// </summary>
/// <param name="association">Accepted association.</param>
public void OnReceiveAssociationAccept(DicomAssociation association)
{
foreach (var ctx in this.client.AdditionalPresentationContexts)
{
foreach (var item in
association.PresentationContexts.Where(pc => pc.AbstractSyntax == ctx.AbstractSyntax))
{
ctx.SetResult(item.Result, item.AcceptedTransferSyntax);
}
}
this.client.associateNotifier.TrySetResult(true);
List<DicomRequest> requests;
lock (this.client.locker)
{
requests = new List<DicomRequest>(this.client.requests);
this.client.requests.Clear();
}
if (requests.Count == 0)
{
DoSendAssociationReleaseRequestAsync(ReleaseTimeout).Wait();
}
else
{
while (requests.Count > 0)
{
foreach (var request in requests)
{
SendRequest(request);
}
// Have any new requests been added while sending previous requests?
lock (this.client.locker)
{
requests = new List<DicomRequest>(this.client.requests);
this.client.requests.Clear();
}
}
}
}
public IAsyncResult BeginSend(
Stream stream,
string callingAe,
string calledAe,
AsyncCallback callback,
object state)
{
var assoc = new DicomAssociation(callingAe, calledAe);
assoc.MaxAsyncOpsInvoked = _asyncInvoked;
assoc.MaxAsyncOpsPerformed = _asyncPerformed;
foreach (var request in _requests) assoc.PresentationContexts.AddFromRequest(request);
foreach (var context in _contexts) assoc.PresentationContexts.Add(context.AbstractSyntax, context.GetTransferSyntaxes().ToArray());
_service = new DicomServiceUser(this, stream, assoc, Logger);
_assoc = new ManualResetEventSlim(false);
_async = new EventAsyncResult(callback, state);
return _async;
}
/// <summary>
/// Send association request.
/// </summary>
/// <param name="association">DICOM association.</param>
protected void SendAssociationRequest(DicomAssociation association)
{
LogID = association.CalledAE;
if (Options.UseRemoteAEForLogName) Logger = LogManager.GetLogger(LogID);
Logger.Info("{calledAE} -> Association request:\n{association}", LogID, association.ToString());
Association = association;
this.SendPDUAsync(new AAssociateRQ(Association)).Wait();
}
/// <summary>
/// Synchronously send existing requests to DICOM service.
/// </summary>
/// <param name="stream">Established network stream.</param>
/// <param name="callingAe">Calling Application Entity Title.</param>
/// <param name="calledAe">Called Application Entity Title.</param>
public void Send(INetworkStream stream, string callingAe, string calledAe)
{
if (!CanSend) return;
var assoc = new DicomAssociation(callingAe, calledAe)
{
MaxAsyncOpsInvoked = this.asyncInvoked,
MaxAsyncOpsPerformed = this.asyncPerformed,
RemoteHost = stream.Host,
RemotePort = stream.Port
};
try
{
DoSendAsync(stream, assoc).Wait();
}
catch (AggregateException e)
{
throw e.Flatten().InnerException;
}
}
private async Task DoSendAsync(INetworkStream stream, DicomAssociation association)
{
try
{
while (this.service != null)
{
await Task.Delay(50).ConfigureAwait(false);
}
this.associateNotifier = new TaskCompletionSource<bool>();
this.completeNotifier = new TaskCompletionSource<bool>();
this.service = new DicomServiceUser(this, stream, association, Options, FallbackEncoding, Logger);
await this.completeNotifier.Task.ConfigureAwait(false);
}
finally
{
Cleanup();
}
}
protected void SendAssociationRequest(DicomAssociation association)
{
LogID = association.CalledAE;
Logger.Log(LogLevel.Info, "{0} -> Association request:\n{1}", LogID, association.ToString());
Association = association;
SendPDU(new AAssociateRQ(Association));
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0) {
// disconnected
CloseConnection(0);
return;
}
_readLength -= count;
if (_readLength > 0) {
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type) {
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
Logger.Log(LogLevel.Info, "{0} <- Association request:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Log(LogLevel.Info, "{0} <- Association accept:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
Logger.Info("{0} <- {1}", LogID, pdu);
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release request", LogID);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Association release response", LogID);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(0);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Log(LogLevel.Info, "{0} <- Abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(0);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
int error = 0;
if (e.InnerException is SocketException) {
error = (e.InnerException as SocketException).ErrorCode;
Logger.Error("Socket error while reading PDU: {0} [{1}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
} else if (!(e.InnerException is ObjectDisposedException))
Logger.Error("IO exception while reading PDU: {0}", e.ToString());
CloseConnection(error);
} catch (Exception e) {
Logger.Log(LogLevel.Error, "Exception processing PDU: {0}", e.ToString());
CloseConnection(0);
}
}
protected void SendAssociationAccept(DicomAssociation association)
{
Association = association;
// reject all presentation contexts that have not already been accepted or rejected
foreach (var pc in Association.PresentationContexts) {
if (pc.Result == DicomPresentationContextResult.Proposed)
pc.SetResult(DicomPresentationContextResult.RejectNoReason);
}
Logger.Log(LogLevel.Info, "{0} -> Association accept:\n{1}", LogID, association.ToString());
SendPDU(new AAssociateAC(Association));
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0)
{
// disconnected
CloseConnection(0);
return;
}
_readLength -= count;
if (_readLength > 0)
{
_network.BeginRead(buffer, buffer.Length - _readLength, _readLength, EndReadPDU, buffer);
return;
}
var raw = new RawPDU(buffer);
switch (raw.Type)
{
case 0x01: {
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName)
{
Logger = LogManager.Default.GetLogger(LogID);
}
Logger.Info("{0} <- Association request:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
}
break;
}
case 0x02: {
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info("{0} <- Association accept:\n{1}", LogID, Association.ToString());
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
}
break;
}
case 0x03: {
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info("{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReject(pdu.Result, pdu.Source, pdu.Reason);
}
break;
}
case 0x04: {
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs)
{
Logger.Info("{0} <- {1}", LogID, pdu);
}
_processQueue.Queue(ProcessPDataTF, pdu);
break;
}
case 0x05: {
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{0} <- Association release request", LogID);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
}
break;
}
case 0x06: {
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{0} <- Association release response", LogID);
if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
}
CloseConnection(0);
break;
}
case 0x07: {
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info("{0} <- Abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
if (this is IDicomServiceProvider)
{
(this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
}
else if (this is IDicomServiceUser)
{
(this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
}
CloseConnection(0);
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (IOException e) {
int error = 0;
if (e.InnerException is SocketException)
{
error = (e.InnerException as SocketException).ErrorCode;
Logger.Error("Socket error while reading PDU: {0} [{1}]", (e.InnerException as SocketException).SocketErrorCode, (e.InnerException as SocketException).ErrorCode);
}
else if (!(e.InnerException is ObjectDisposedException))
{
Logger.Error("IO exception while reading PDU: {0}", e.ToString());
}
CloseConnection(error);
} catch (NullReferenceException) {
// connection already closed; silently ignore
CloseConnection(0);
} catch (Exception e) {
Logger.Error("Exception processing PDU: {0}", e.ToString());
CloseConnection(0);
}
}
/// <summary>
/// Initializes new A-ASSOCIATE-AC
/// </summary>
/// <param name="assoc">Association parameters</param>
public AAssociateAC(DicomAssociation assoc)
{
_assoc = assoc;
}
/// <summary>
/// Asynchronously send existing requests to DICOM service.
/// </summary>
/// <param name="stream">Established network stream.</param>
/// <param name="callingAe">Calling Application Entity Title.</param>
/// <param name="calledAe">Called Application Entity Title.</param>
/// <returns>Awaitable task.</returns>
public Task SendAsync(INetworkStream stream, string callingAe, string calledAe)
{
if (!CanSend) return Task.FromResult(false); // TODO Replace with Task.CompletedTask when moving to .NET 4.6
var assoc = new DicomAssociation(callingAe, calledAe)
{
MaxAsyncOpsInvoked = this.asyncInvoked,
MaxAsyncOpsPerformed = this.asyncPerformed,
RemoteHost = stream.Host,
RemotePort = stream.Port
};
return DoSendAsync(stream, assoc);
}
public void OnReceiveAssociationAccept(DicomAssociation association)
{
_client._assoc.Set();
_client._assoc = null;
foreach (var request in _client._requests) SendRequest(request);
_client._requests.Clear();
}
/// <summary>
/// Initializes new A-ASSOCIATE-AC
/// </summary>
/// <param name="assoc">Association parameters</param>
public AAssociateAC(DicomAssociation assoc) {
_assoc = assoc;
}
/// <summary>
/// Initializes an instance of the <see cref="AssociationAcceptedEventArgs"/> class.
/// </summary>
/// <param name="association">Accepted association.</param>
public AssociationAcceptedEventArgs(DicomAssociation association)
{
Association = association;
}
private async void ReadAndProcessPDUs()
{
try
{
while (this.IsConnected)
{
// Read PDU header
_readLength = 6;
var buffer = new byte[6];
var count = await this._network.ReadAsync(buffer, 0, 6).ConfigureAwait(false);
do
{
if (count == 0)
{
// disconnected
this.CloseConnection(null);
return;
}
this._readLength -= count;
if (this._readLength > 0)
{
count =
await
this._network.ReadAsync(buffer, 6 - this._readLength, this._readLength)
.ConfigureAwait(false);
}
}
while (this._readLength > 0);
var length = BitConverter.ToInt32(buffer, 2);
length = Endian.Swap(length);
this._readLength = length;
Array.Resize(ref buffer, length + 6);
count = await this._network.ReadAsync(buffer, 6, length).ConfigureAwait(false);
// Read PDU
do
{
if (count == 0)
{
// disconnected
this.CloseConnection(null);
return;
}
this._readLength -= count;
if (this._readLength > 0)
{
count =
await
this._network.ReadAsync(buffer, buffer.Length - this._readLength, this._readLength)
.ConfigureAwait(false);
}
}
while (this._readLength > 0);
var raw = new RawPDU(buffer);
switch (raw.Type)
{
case 0x01:
{
Association = new DicomAssociation();
var pdu = new AAssociateRQ(Association);
pdu.Read(raw);
LogID = Association.CallingAE;
if (Options.UseRemoteAEForLogName) Logger = LogManager.GetLogger(LogID);
Logger.Info(
"{callingAE} <- Association request:\n{association}",
LogID,
Association.ToString());
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAssociationRequest(Association);
break;
}
case 0x02:
{
var pdu = new AAssociateAC(Association);
pdu.Read(raw);
LogID = Association.CalledAE;
Logger.Info(
"{calledAE} <- Association accept:\n{assocation}",
LogID,
Association.ToString());
if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAssociationAccept(Association);
break;
}
case 0x03:
{
var pdu = new AAssociateRJ();
pdu.Read(raw);
Logger.Info(
"{logId} <- Association reject [result: {pduResult}; source: {pduSource}; reason: {pduReason}]",
LogID,
pdu.Result,
pdu.Source,
pdu.Reason);
if (this is IDicomServiceUser)
(this as IDicomServiceUser).OnReceiveAssociationReject(
pdu.Result,
pdu.Source,
pdu.Reason);
break;
}
case 0x04:
{
var pdu = new PDataTF();
pdu.Read(raw);
if (Options.LogDataPDUs) Logger.Info("{logId} <- {@pdu}", LogID, pdu);
await this.ProcessPDataTFAsync(pdu).ConfigureAwait(false);
break;
}
case 0x05:
{
var pdu = new AReleaseRQ();
pdu.Read(raw);
Logger.Info("{logId} <- Association release request", LogID);
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAssociationReleaseRequest();
break;
}
case 0x06:
{
var pdu = new AReleaseRP();
pdu.Read(raw);
Logger.Info("{logId} <- Association release response", LogID);
if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAssociationReleaseResponse();
CloseConnection(null);
return;
}
case 0x07:
{
var pdu = new AAbort();
pdu.Read(raw);
Logger.Info(
"{logId} <- Abort: {pduSource} - {pduReason}",
LogID,
pdu.Source,
pdu.Reason);
if (this is IDicomServiceProvider) (this as IDicomServiceProvider).OnReceiveAbort(pdu.Source, pdu.Reason);
else if (this is IDicomServiceUser) (this as IDicomServiceUser).OnReceiveAbort(pdu.Source, pdu.Reason);
CloseConnection(null);
return;
}
case 0xFF:
{
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
}
}
catch (ObjectDisposedException)
{
// silently ignore
CloseConnection(null);
}
catch (NullReferenceException)
{
// connection already closed; silently ignore
CloseConnection(null);
}
catch (IOException e)
{
LogIOException(this.Logger, e, true);
CloseConnection(e);
}
catch (Exception e)
{
Logger.Error("Exception processing PDU: {@error}", e);
CloseConnection(e);
}
}
private void InitializeSend(Stream stream, string callingAe, string calledAe)
{
var assoc = new DicomAssociation(callingAe, calledAe)
{
MaxAsyncOpsInvoked = this.asyncInvoked,
MaxAsyncOpsPerformed = this.asyncPerformed
};
foreach (var request in this.requests)
{
assoc.PresentationContexts.AddFromRequest(request);
}
foreach (var context in this.AdditionalPresentationContexts)
{
assoc.PresentationContexts.Add(context.AbstractSyntax, context.GetTransferSyntaxes().ToArray());
}
this.associateNotifier = new TaskCompletionSource<bool>();
this.completeNotifier = new TaskCompletionSource<bool>();
this.service = new DicomServiceUser(this, stream, assoc, this.Options, this.Logger);
}
/// <summary>
/// Send association accept response.
/// </summary>
/// <param name="association">DICOM association.</param>
protected void SendAssociationAccept(DicomAssociation association)
{
Association = association;
// reject all presentation contexts that have not already been accepted or rejected
foreach (var pc in Association.PresentationContexts)
{
if (pc.Result == DicomPresentationContextResult.Proposed) pc.SetResult(DicomPresentationContextResult.RejectNoReason);
}
Logger.Info("{logId} -> Association accept:\n{association}", LogID, association.ToString());
this.SendPDUAsync(new AAssociateAC(Association)).Wait();
}
internal DicomServiceUser(
DicomClient client,
Stream stream,
DicomAssociation association,
DicomServiceOptions options,
Logger log)
: base(stream, log)
{
this.client = client;
this.isLingering = false;
if (options != null) this.Options = options;
this.SendAssociationRequest(association);
}
public DicomServiceUser(DicomClient client, Stream stream, DicomAssociation association, Logger log)
: base(stream, log)
{
_client = client;
if (_client.Options != null) Options = _client.Options;
SendAssociationRequest(association);
}
internal DicomServiceUser(
DicomClient client,
INetworkStream stream,
DicomAssociation association,
DicomServiceOptions options,
Encoding fallbackEncoding,
Logger log)
: base(stream, fallbackEncoding, log)
{
this.client = client;
if (options != null)
{
Options = options;
}
List<DicomRequest> requests;
lock (this.client.locker)
{
requests = new List<DicomRequest>(this.client.requests);
}
foreach (var request in requests)
{
association.PresentationContexts.AddFromRequest(request);
}
foreach (var context in client.AdditionalPresentationContexts)
{
association.PresentationContexts.Add(
context.AbstractSyntax,
context.UserRole,
context.ProviderRole,
context.GetTransferSyntaxes().ToArray());
}
SendAssociationRequest(association);
}
protected void SendAssociationRequest(DicomAssociation association) {
LogID = association.CalledAE;
if (Options.UseRemoteAEForLogName)
Logger = LogManager.Default.GetLogger(LogID);
Logger.Info("{0} -> Association request:\n{1}", LogID, association.ToString());
Association = association;
SendPDU(new AAssociateRQ(Association));
}
public DicomServiceUser(DicomClient client, Stream stream, DicomAssociation association) : base(stream)
{
_client = client;
SendAssociationRequest(association);
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
if (association.CalledAE.Equals("ANY-SCP", StringComparison.OrdinalIgnoreCase))
{
Thread.Sleep(1000);
DicomClientTest.remoteHost = association.RemoteHost;
DicomClientTest.remotePort = association.RemotePort;
this.SendAssociationAccept(association);
}
else
{
this.SendAssociationReject(
DicomRejectResult.Permanent,
DicomRejectSource.ServiceUser,
DicomRejectReason.CalledAENotRecognized);
}
}
public void OnReceiveAssociationRequest(DicomAssociation association)
{
Thread.Sleep(1000);
this.SendAssociationAccept(association);
}
