// Main thread for receiving telegrams
public async Task <Telegram> Receive()
{
try
{
if (!Connected)
{
await MyConnect().ConfigureAwait(false);
}
// Read header
Telegram tel = new TelegramOnlyHeader();
int numRead = 0;
do
{
numRead += await MyRead(tel.ByteBuffer, numRead, tel.ByteBuffer.Length - numRead).ConfigureAwait(false);
} while (numRead < tel.ByteBuffer.Length);
// Read body
tel.ReadBuffer();
tel.Validate(false);
Telegram tel1 = Activator.CreateInstance(AllTelegrams[tel.TelType].GetType()) as Telegram;
tel.ByteBuffer.CopyTo(tel1.ByteBuffer, 0);
if (tel1.DesignLength() - tel.DesignLength() > 0 && tel.TelCode == 0)
{
numRead = 0;
do
{
numRead += await MyRead(tel1.ByteBuffer, tel.DesignLength() + numRead, tel1.DesignLength() - tel.DesignLength() - numRead).ConfigureAwait(false);
} while (numRead < tel1.DesignLength() - tel.DesignLength());
}
// Prepare ACK telegram
tel1.ReadBuffer();
tel1.Validate();
TelegramACK telACK = new TelegramACK {
Sequence = tel.Sequence, TelCode = 0xFFFF, TelType = tel.TelType, Sender = tel.Receiver, Receiver = tel.Sender
};
telACK.Build();
// Send ACK telegram
await MyWrite(telACK.ByteBuffer, 0, telACK.ByteBuffer.Length).ConfigureAwait(false);
tel1.CommRcvStatus = Telegram.CommRcvStatusEnum.NotifyDone;
LastReceiveTime = DateTime.Now;
Log.AddLog(Log.Severity.EVENT, Name, String.Format("Received finished : {0}", tel1.ToString()));
return(tel1);
}
catch (Exception ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, ex.Message);
throw;
}
}
// notify about new received telegram
// Main thread for receiving telegrams
public override void RcvThreading()
{
try
{
LastReceiveTime = DateTime.Now;
// initialize from this thread
while (Thread.CurrentThread.ThreadState == ThreadState.Background)
{
try
{
lock (_lockRcvTelegram)
RcvTelegrams.RemoveAll(p => p.CommRcvStatus >= Telegram.CommRcvStatusEnum.NotifyDone);
if (DateTime.Now - LastReceiveTime > RcvTimeOut)
{
InitRcvSocket();
LastReceiveTime = DateTime.Now;
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading", "Timeout receiving");
}
else if (DateTime.Now - LastNotifyTime > RefreshTime)
{
LastNotifyTime = DateTime.Now;
Log?.AddLog(Log.Severity.EVENT, Name, "Communicator.RcvThreading", "Refresh() is called");
CallRefresh();
}
else if (!RcvSocket.Connected)
{
InitRcvSocket();
ConnectRcvPartner();
}
else
{
if (RcvSocket.Available == 0)
{
Thread.Sleep(1);
}
else
{
Telegram tel = new TelegramOnlyHeader();
int numRead = 0;
int crRead = 0;
do
{
crRead = RcvSocket.Receive(tel.ByteBuffer, numRead, tel.ByteBuffer.Length - numRead, SocketFlags.None);
numRead += crRead;
if (crRead == 0)
{
throw new TelegramException("Receive bytes is 0.");
}
} while (numRead < tel.ByteBuffer.Length);
// Log?.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", String.Format("Received {0} bytes", numRead));
tel.ReadBuffer();
tel.Validate(false);
Telegram tel1 = Activator.CreateInstance(AllTelegrams[tel.TelType].GetType()) as Telegram;
tel.ByteBuffer.CopyTo(tel1.ByteBuffer, 0);
if (tel1.DesignLength() - tel.DesignLength() > 0 && tel.TelCode == 0)
{
numRead = 0;
crRead = 0;
do
{
crRead = RcvSocket.Receive(tel1.ByteBuffer, tel.DesignLength() + numRead, tel1.DesignLength() - tel.DesignLength() - numRead, SocketFlags.None);
numRead += crRead;
if (crRead == 0)
{
throw new TelegramException("Receive bytes is 0.");
}
} while (numRead < tel1.DesignLength() - tel.DesignLength());
// Log?.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", String.Format("Received {0} bytes", numRead));
}
tel1.ReadBuffer();
tel1.Validate();
NotifyRcv(tel1);
TelegramACK telACK = new TelegramACK();
telACK.Sequence = tel.Sequence;
telACK.TelCode = (System.UInt16) 0xFFFF;
telACK.TelType = tel.TelType;
telACK.Sender = tel.Receiver;
telACK.Receiver = tel.Sender;
telACK.Build();
RcvSocket.Send(telACK.ByteBuffer);
tel1.CommRcvStatus = Telegram.CommRcvStatusEnum.NotifyDone;
LastReceiveTime = DateTime.Now;
LastNotifyTime = DateTime.Now;
Log?.AddLog(Log.Severity.EVENT, Name, "Communicator.RcvThreading", String.Format("Received finished : {0}", tel1.ToString()));
}
}
}
catch (SocketException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::SocketException", ex.Message);
Thread.Sleep(1000);
}
catch (TelegramException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::TelegramException", ex.Message);
Thread.Sleep(1000);
}
catch (KeyNotFoundException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::KeyNotFound", ex.Message);
Thread.Sleep(1000);
}
catch (CommunicationException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::CommunicationException", ex.Message);
Thread.Sleep(1000);
}
catch (ThreadAbortException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::ThreadAbortException", ex.Message);
return;
}
catch (ServiceCommunicatorException ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.RcvThreading::ServiceCommunicationException", ex.Message);
Thread.Sleep(3000);
}
catch (Exception ex)
{
Log?.AddLog(Log.Severity.EXCEPTION, Name, "Communicator.SendThread::Exception", ex.Message);
Thread.Sleep(1000);
}
}
}
finally
{
RcvSocket.Close();
RcvSocket.Dispose();
SendSocket.Close();
SendSocket.Dispose();
}
}