// 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(); } }