/// <summary>
/// The graceful release of an association between two AEs shall be performed
/// through ACSE A-RELEASE request, indication, response, and confirmation
/// primitives. The initiator of the service is hereafter called a requestor
/// and the service-user which receives the A-RELEASE indication is hereafter
/// called the acceptor. It shall be a confirmed service.
/// </summary>
protected void SendReleaseResponse()
{
Log.Info("{0} -> Association release response", LogID);
AReleaseRP pdu = new AReleaseRP();
SendRawPDU(pdu.Write());
}
private bool ProcessNextPDU()
{
RawPDU raw = new RawPDU(_network);
if (raw.Type == 0x04) {
if (_dimse == null) {
_dimse = new DcmDimseInfo();
}
}
try {
raw.ReadPDU();
switch (raw.Type) {
case 0x01: {
_assoc = new DcmAssociate();
AAssociateRQ pdu = new AAssociateRQ(_assoc);
pdu.Read(raw);
Log.Info("{0} <- Association request:\n{1}", LogID, Associate.ToString());
OnReceiveAssociateRequest(_assoc);
return true;
}
case 0x02: {
AAssociateAC pdu = new AAssociateAC(_assoc);
pdu.Read(raw);
Log.Info("{0} <- Association accept:\n{1}", LogID, Associate.ToString());
OnReceiveAssociateAccept(_assoc);
return true;
}
case 0x03: {
AAssociateRJ pdu = new AAssociateRJ();
pdu.Read(raw);
Log.Info("{0} <- Association reject [result: {1}; source: {2}; reason: {3}]", LogID, pdu.Result, pdu.Source, pdu.Reason);
OnReceiveAssociateReject(pdu.Result, pdu.Source, pdu.Reason);
return true;
}
case 0x04: {
PDataTF pdu = new PDataTF();
pdu.Read(raw);
//Log.Debug("{0} <- P-Data-TF", LogID);
return ProcessPDataTF(pdu);
}
case 0x05: {
AReleaseRQ pdu = new AReleaseRQ();
pdu.Read(raw);
Log.Info("{0} <- Association release request", LogID);
OnReceiveReleaseRequest();
return true;
}
case 0x06: {
AReleaseRP pdu = new AReleaseRP();
pdu.Read(raw);
Log.Info("{0} <- Association release response", LogID);
OnReceiveReleaseResponse();
return true;
}
case 0x07: {
AAbort pdu = new AAbort();
pdu.Read(raw);
Log.Info("{0} <- Association abort: {1} - {2}", LogID, pdu.Source, pdu.Reason);
OnReceiveAbort(pdu.Source, pdu.Reason);
return true;
}
case 0xFF: {
return false;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
} catch (SocketException) {
throw;
} catch (Exception e) {
#if DEBUG
Log.Error("{0} -> Error reading PDU [type: 0x{1:x2}]: {2}", LogID, raw.Type, e.ToString());
#else
Log.Error("{0} -> Error reading PDU [type: 0x{1:x2}]: {2}", LogID, raw.Type, e.Message);
#endif
OnNetworkError(e);
//String file = String.Format(@"{0}\Errors\{1}.pdu",
// Dicom.Debug.GetStartDirectory(), DateTime.Now.Ticks);
//Directory.CreateDirectory(Dicom.Debug.GetStartDirectory() + @"\Errors");
//raw.Save(file);
return false;
}
}
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 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);
}
}
private void EndReadPDU(IAsyncResult result)
{
try {
byte[] buffer = (byte[])result.AsyncState;
int count = _network.EndRead(result);
if (count == 0)
{
// disconnected
_network.Close();
_isConnected = false;
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);
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();
}
_network.Close();
_isConnected = false;
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);
}
_network.Close();
_isConnected = false;
break;
}
case 0xFF: {
break;
}
default:
throw new DicomNetworkException("Unknown PDU type");
}
BeginReadPDUHeader();
} catch (Exception e) {
Logger.Log(LogLevel.Error, "Exception processing PDU: {0}", e.ToString());
_network.Close();
_isConnected = false;
}
}
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);
}
}
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);
}
}