private QueryRetrieveScu GetScu(AeInfo server)
{
QueryRetrieveScu scu = null;
bool useSecurePort = (server.Port == 0) && (server.SecurePort != 0);
int port = useSecurePort ? server.SecurePort : server.Port;
if (useSecurePort)
{
GatewaySession.InitializeDicomSecurity(false);
scu = new QueryRetrieveScu(string.Empty, DicomNetSecurityMode.Tls, GatewaySession._openSslOptions);
scu.UseSecureHost = true;
GatewaySession.SetCiphers(scu);
}
if (scu == null)
{
scu = new QueryRetrieveScu();
}
scu.AETitle = server.AETitle;
scu.HostAddress = IPAddress.Parse(server.Address);
scu.HostPort = port;
return(scu);
}
//[PresentationContext(DicomUidType.PatientRootQueryFind, new byte[] {1,0,1},DicomUidType.ImplicitVRLittleEndian)]
//[PresentationContext(DicomUidType.PatientStudyQueryFind, DicomUidType.ImplicitVRLittleEndian)]
//[PresentationContext(DicomUidType.StudyRootQueryFind, DicomUidType.ImplicitVRLittleEndian)]
public DicomCommandStatusType OnFind
(
DicomClient client,
byte presentationId,
int messageId,
string affectedClass,
DicomCommandPriorityType priority,
DicomDataSet request
)
{
int countOfServersConnection;
try
{
__Client = client;
if (null == __ServersManager)
{
GatewaySession.Log(string.Empty, string.Empty, -1, DicomCommandType.CFind, LogType.Error, MessageDirection.None, null, "[Gateway] Gateway server not available");
return(DicomCommandStatusType.ProcessingFailure);
}
countOfServersConnection = 0;
//make sure to break the loop on success or normal failure
while (countOfServersConnection < __ServersManager.Servers.Count)
{
AeInfo currentRemoteServer;
DicomScp remoteScp;
QueryRetrieveScu cFindScu;
countOfServersConnection++;
currentRemoteServer = __ServersManager.GetRemoteServer();
remoteScp = GetScp(currentRemoteServer);
cFindScu = GetScu(__ServersManager.Gateway.Server);
try
{
RegisterEvents(cFindScu);
if (cFindScu.SecurityMode == DicomNetSecurityMode.Tls)
{
GatewaySession.InitializeDicomSecurity(false);
GatewaySession.SetCiphers(cFindScu);
GatewaySession.SetSecurityCertificates(cFindScu);
}
__CFindScu = cFindScu;
__CurrentStatus = DicomCommandStatusType.Success;
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Information, MessageDirection.Output, request,
"[Gateway] Sending C-Find request to remote server \"" + currentRemoteServer.AETitle + "\"");
cFindScu.Find(remoteScp, request);
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Information, MessageDirection.None, null,
"[Gateway] C-Find request sent successfully \"" + currentRemoteServer.AETitle + "\"");
break;
}
catch (ClientConnectionException exception)
{
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Warning, MessageDirection.None, null, "[Gateway] Connecting to server failed \"" + currentRemoteServer.AETitle + "\"\n" + exception.Message);
__ServersManager.SetRemoteServerConnectionFailure();
__CurrentStatus = DicomCommandStatusType.Failure;
}
catch (ClientCommunicationException exception)
{
__CurrentStatus = exception.Status;
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Error, MessageDirection.None, null, "[Gateway] Communicating with server failed \"" + currentRemoteServer.AETitle + "\"\n" + exception.Message);
break;
}
catch (DicomException exception)
{
if (__CurrentStatus == DicomCommandStatusType.Success)
{
__CurrentStatus = DicomCommandStatusType.Failure;
}
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Error, MessageDirection.None, null, "[Gateway] Forwarding to server failed \"" + currentRemoteServer.AETitle + "\"\n" + exception.Message);
break;
}
catch (Exception exception)
{
if (__CurrentStatus == DicomCommandStatusType.Success)
{
__CurrentStatus = DicomCommandStatusType.ProcessingFailure;
}
GatewaySession.Log(client, DicomCommandType.CFind, LogType.Error, MessageDirection.None, null, "[Gateway] Forwarding to server failed \"" + currentRemoteServer.AETitle + "\"\n" + exception.Message);
break;
}
finally
{
UnregisterEvents(cFindScu);
cFindScu.Dispose();
__CFindScu = null;
}
}
return(__CurrentStatus);
}
finally
{
request.Dispose();
}
}