// Main thread for sending telegrams
private void SendThreading()
{
TelegramACK telAck = null;
try
{
if (SimulateMFCS)
{
SendListener = new TcpListener(SendIPEndPoint);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", SendIPEndPoint.ToString());
SendListener.Start();
}
lock (_lockSendTelegram)
{
SendTelegrams.RemoveAll(p => p.CommSendStatus >= Telegram.CommSendStatusEnum.Ack);
}
LastSendTime = DateTime.Now;
while (Thread.CurrentThread.ThreadState == ThreadState.Background)
{
try
{
Telegram tel = null;
lock (_lockSendTelegram)
tel = SendTelegrams.FirstOrDefault(prop => prop.CommSendStatus < Telegram.CommSendStatusEnum.Ack);
if (DateTime.Now - LastSendTime > SendTimeOut)
{
InitSendSocket();
if (tel != null)
{
tel.CommSendStatus = Telegram.CommSendStatusEnum.None;
}
LastSendTime = DateTime.Now;
Retry = 0;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", "Send timeout, SendSocket reinitialized!");
}
else if (DateTime.Now - LastSendTime > KeepALifeTime && tel == null)
{
Telegram tRes = null;
lock (_lockSendTelegram)
tRes = SendTelegrams.FirstOrDefault(prop => prop.CommSendStatus < Telegram.CommSendStatusEnum.Ack);
if (tRes == null)
{
if (KeepALifeTelegram != null)
{
Telegram t = Activator.CreateInstance(KeepALifeTelegram.GetType()) as Telegram;
t.Sender = MFCS_ID;
t.Receiver = PLC_ID;
t.Build();
AddSendTelegram(t);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Adding KeepALife telegram"));
}
}
}
else if (!SendSocket.Connected)
{
InitSendSocket();
ConnectSendPartner();
}
else if (tel != null)
{
switch (tel.CommSendStatus)
{
case (Telegram.CommSendStatusEnum.None):
tel.Sequence = Sequence;
tel.Build();
// Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Start sending {0}", tel.ToString()));
SendSocket.Send(tel.ByteBuffer, tel.Length, SocketFlags.None);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Sended {0}", tel.ToString()));
tel.CommSendStatus = Telegram.CommSendStatusEnum.WaitACK;
telAck = new TelegramACK();
SendTime = DateTime.Now;
break;
case (Telegram.CommSendStatusEnum.WaitACK):
int numRead = 0;
do
{
numRead += SendSocket.Receive(telAck.ByteBuffer, numRead, telAck.ByteBuffer.Length - numRead, SocketFlags.None);
} while (numRead < telAck.ByteBuffer.Length);
telAck.ReadBuffer();
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThread", String.Format("Received ACK {0}", telAck.ToString()));
if (telAck.Validate() && telAck.Sequence == tel.Sequence)
{
tel.CommSendStatus = Telegram.CommSendStatusEnum.Ack;
LastSendTime = DateTime.Now;
Retry = 0;
if (Sequence < 99)
{
Sequence++;
}
else
{
Sequence = 0;
}
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", String.Format("Send Finished : {0}", tel.ToString()));
NotifySend(tel);
}
else
{
// tel.CommSendStatus = Telegram.CommSendStatusEnum.None;
Retry++;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.SendThreading", String.Format("Retry increased - {0}", Retry));
}
break;
default:
break;
}
}
else
{
Thread.Sleep(100);
}
}
catch (SocketException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::SocketException", ex.Message);
Thread.Sleep(1000);
}
}
catch (TelegramException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::TelegramException", ex.Message);
Thread.Sleep(1000);
}
catch (ThreadAbortException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Communication", ex.Message);
return;
}
catch (CommunicationException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::CommunicationException", ex.Message);
Thread.Sleep(1000);
}
}
// Main thread for receiving telegrams
private void RcvThreading()
{
try
{
if (SimulateMFCS)
{
RcvListener = new TcpListener(RcvIPEndPoint);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", RcvIPEndPoint.ToString());
RcvListener.Start();
}
LastReceiveTime = DateTime.Now;
while (Thread.CurrentThread.ThreadState == ThreadState.Background)
{
try
{
RcvTelegrams.RemoveAll(p => p.CommRcvStatus >= Telegram.CommRcvStatusEnum.NotifyDone);
if (DateTime.Now - LastReceiveTime > RcvTimeOut)
{
InitRcvSocket();
LastReceiveTime = DateTime.Now;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", "Timeout receiving");
}
else if (DateTime.Now - LastNotifyTime > RefreshTime)
{
LastNotifyTime = DateTime.Now;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", "Refresh() is called");
OnRefresh.ForEach(prop => prop?.Invoke());
}
else if (!RcvSocket.Connected)
{
InitRcvSocket();
ConnectRcvPartner();
}
else
{
if (RcvSocket.Available == 0)
{
Thread.Sleep(1);
}
else
{
Telegram tel = new TelegramOnlyHeader();
int numRead = 0;
do
{
numRead += RcvSocket.Receive(tel.ByteBuffer, numRead, tel.ByteBuffer.Length - numRead, SocketFlags.None);
} 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;
do
{
numRead += RcvSocket.Receive(tel1.ByteBuffer, tel.DesignLength() + numRead, tel1.DesignLength() - tel.DesignLength() - numRead, SocketFlags.None);
} 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);
Log.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", String.Format("ACK sended {0}", telACK.ToString()));
tel1.CommRcvStatus = Telegram.CommRcvStatusEnum.Ack;
RcvTelegrams.Add(tel1);
LastReceiveTime = DateTime.Now;
LastNotifyTime = DateTime.Now;
Log.AddLog(Log.Severity.EVENT, Name, "Communication.RcvThreading", String.Format("Received finished : {0}", tel1.ToString()));
}
}
}
catch (SocketException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Socket", ex.Message);
Thread.Sleep(1000);
}
catch (TelegramException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Telegram", ex.Message);
Thread.Sleep(1000);
}
catch (KeyNotFoundException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::KeyNotFound", ex.Message);
Thread.Sleep(1000);
}
catch (CommunicationException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Communication", ex.Message);
Thread.Sleep(1000);
}
catch (ThreadAbortException ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.RcvThreading::Communication", ex.Message);
return;
}
catch (Exception ex)
{
Log.AddLog(Log.Severity.EXCEPTION, Name, "Communication.SendThread::unknown", ex.Message);
Thread.Sleep(1000);
}
}
}
finally
{
RcvSocket.Close();
RcvSocket.Dispose();
SendSocket.Close();
SendSocket.Dispose();
}
}
