private void ProcessSendQueue(ConnectionState state)
{
LogTrace("Entering ProcessSendQueue");
while (true)
{
ISCSIPDU response;
bool stopped = !state.SendQueue.TryDequeue(out response);
if (stopped)
{
return;
}
Socket clientSocket = state.ClientSocket;
PDUHelper.SetStatSN(response, state.ConnectionParameters.StatSN);
if (state.Session != null)
{
PDUHelper.SetExpCmdSN(response, state.Session.ExpCmdSN, state.Session.ExpCmdSN + state.Session.CommandQueueSize);
}
if (response is SCSIResponsePDU ||
response is LoginResponsePDU ||
response is TextResponsePDU ||
(response is SCSIDataInPDU && ((SCSIDataInPDU)response).StatusPresent) ||
response is RejectPDU)
{
state.ConnectionParameters.StatSN++;
}
try
{
clientSocket.Send(response.GetBytes());
Log(Severity.Verbose, "[{0}] Sent response to initator, Operation: {1}, Size: {2}", state.ConnectionIdentifier, response.OpCode, response.Length);
if (response is LogoutResponsePDU)
{
clientSocket.Close(); // We can close the connection now
LogTrace("Leaving ProcessSendQueue");
return;
}
else if (response is LoginResponsePDU)
{
if (((LoginResponsePDU)response).Status != LoginResponseStatusName.Success)
{
// Login Response: If the Status Class is not 0, the initiator and target MUST close the TCP connection.
clientSocket.Close(); // We can close the connection now
LogTrace("Leaving ProcessSendQueue");
return;
}
}
}
catch (SocketException ex)
{
Log(Severity.Verbose, "[{0}] Failed to send response to initator. Operation: {1}, Size: {2}, SocketException: {3}", state.ConnectionIdentifier, response.OpCode, response.Length, ex.Message);
LogTrace("Leaving ProcessSendQueue");
return;
}
catch (ObjectDisposedException)
{
Log(Severity.Verbose, "[{0}] Failed to send response to initator. Operation: {1}, Size: {2}. ObjectDisposedException", state.ConnectionIdentifier, response.OpCode, response.Length);
LogTrace("Leaving ProcessSendQueue");
return;
}
}
}
public static void TrySendPDU(StateObject state, ISCSIPDU response)
{
Socket clientSocket = state.ClientSocket;
try
{
PDUHelper.SetStatSN(response, state.ConnectionParameters.StatSN);
PDUHelper.SetExpCmdSN(response, state.SessionParameters.ExpCmdSN, state.SessionParameters.ExpCmdSN + state.SessionParameters.CommandQueueSize);
if (response is SCSIResponsePDU || (response is SCSIDataInPDU && ((SCSIDataInPDU)response).StatusPresent))
{
state.ConnectionParameters.StatSN++;
}
clientSocket.Send(response.GetBytes());
Log(LogLevel.Debug, "[{0}][TrySendPDU] Sent response to initator, Operation: {1}, Size: {2}", state.ConnectionIdentifier, response.OpCode, response.Length);
}
catch (SocketException ex)
{
Log(LogLevel.Warning, "[{0}][TrySendPDU] Failed to send response to initator (Operation: {1}, Size: {2}), SocketException: {3}", state.ConnectionIdentifier, response.OpCode, response.Length, ex.Message);
}
catch (ObjectDisposedException)
{
}
}