public Task StartAsync(CancellationToken cancellationToken) { Logger.LogInformation($"JT808 TCP Server start at {IPAddress.Any}:{Configuration.TcpPort}."); Task.Factory.StartNew(async() => { while (!cancellationToken.IsCancellationRequested) { var socket = await server.AcceptAsync(); UnionTcpSession jT808TcpSession = new UnionTcpSession(socket); SessionManager.TryAdd(jT808TcpSession); await Task.Factory.StartNew(async(state) => { var session = (UnionTcpSession)state; if (Logger.IsEnabled(LogLevel.Information)) { Logger.LogInformation($"[Connected]:{session.Client.RemoteEndPoint}"); } var pipe = new Pipe(); Task writing = FillPipeAsync(session, pipe.Writer); Task reading = ReadPipeAsync(session, pipe.Reader); await Task.WhenAll(reading, writing); SessionManager.RemoveBySessionId(session.SessionID); }, jT808TcpSession); } }, cancellationToken); return(Task.CompletedTask); }
private async Task FillPipeAsync(UnionTcpSession session, PipeWriter writer) { while (true) { try { Memory <byte> memory = writer.GetMemory(Configuration.MiniNumBufferSize); //设备多久没发数据就断开连接 Receive Timeout. int bytesRead = await session.Client.ReceiveAsync(memory, SocketFlags.None, session.ReceiveTimeout.Token); if (bytesRead == 0) { break; } writer.Advance(bytesRead); } catch (OperationCanceledException ex) { Logger.LogError($"[Receive Timeout]:{session.Client.RemoteEndPoint}"); break; } catch (System.Net.Sockets.SocketException ex) { Logger.LogError($"[{ex.SocketErrorCode.ToString()},{ex.Message}]:{session.Client.RemoteEndPoint}"); break; } #pragma warning disable CA1031 // Do not catch general exception types catch (Exception ex) { Logger.LogError(ex, $"[Receive Error]:{session.Client.RemoteEndPoint}"); break; } #pragma warning restore CA1031 // Do not catch general exception types FlushResult result = await writer.FlushAsync(); if (result.IsCompleted) { break; } } writer.Complete(); }
private async Task ReadPipeAsync(UnionTcpSession session, PipeReader reader) { while (true) { ReadResult result = await reader.ReadAsync(); if (result.IsCompleted) { break; } ReadOnlySequence <byte> buffer = result.Buffer; SequencePosition consumed = buffer.Start; SequencePosition examined = buffer.End; try { if (result.IsCanceled) { break; } if (buffer.Length > 0) { ReaderBuffer(ref buffer, session, out consumed, out examined); } } #pragma warning disable CA1031 // Do not catch general exception types catch (Exception ex) { Logger.LogError(ex, $"[ReadPipe Error]:{session.Client.RemoteEndPoint}"); break; } #pragma warning restore CA1031 // Do not catch general exception types finally { reader.AdvanceTo(consumed, examined); } } reader.Complete(); }
private void ReaderBuffer(ref ReadOnlySequence <byte> buffer, UnionTcpSession session, out SequencePosition consumed, out SequencePosition examined) { consumed = buffer.Start; examined = buffer.End; SequenceReader <byte> seqReader = new SequenceReader <byte>(buffer); if (seqReader.TryPeek(out byte beginMark)) { if (beginMark != JT808Package.BeginFlag) { throw new ArgumentException("Not JT808 Packages."); } } byte mark = 0; long totalConsumed = 0; while (!seqReader.End) { if (seqReader.IsNext(JT808Package.BeginFlag, advancePast: true)) { if (mark == 1) { ReadOnlySpan <byte> contentSpan = ReadOnlySpan <byte> .Empty; try { contentSpan = seqReader.Sequence.Slice(totalConsumed, seqReader.Consumed - totalConsumed).FirstSpan; //过滤掉不是808标准包(14) //(头)1+(消息 ID )2+(消息体属性)2+(终端手机号)6+(消息流水号)2+(检验码 )1+(尾)1 if (contentSpan.Length > 14) { var package = Serializer.HeaderDeserialize(contentSpan, minBufferSize: 10240); AtomicCounterService.MsgSuccessIncrement(); if (Logger.IsEnabled(LogLevel.Debug)) { Logger.LogDebug($"[Atomic Success Counter]:{AtomicCounterService.MsgSuccessCount}"); } if (Logger.IsEnabled(LogLevel.Trace)) { Logger.LogTrace($"[Accept Hex {session.Client.RemoteEndPoint}]:{package.OriginalData.ToArray().ToHexString()}"); } SessionManager.TryLink(package.Header.TerminalPhoneNo, session); _unionNormalReplyMessageHandler.Processor(package, session); } } catch (NotImplementedException ex) { Logger.LogError(ex.Message); } catch (JT808Exception ex) { AtomicCounterService.MsgFailIncrement(); if (Logger.IsEnabled(LogLevel.Information)) { Logger.LogInformation($"[Atomic Fail Counter]:{AtomicCounterService.MsgFailCount}"); } Logger.LogError($"[HeaderDeserialize ErrorCode]:{ ex.ErrorCode},[ReaderBuffer]:{contentSpan.ToArray().ToHexString()}"); } totalConsumed += (seqReader.Consumed - totalConsumed); if (seqReader.End) { break; } seqReader.Advance(1); mark = 0; } mark++; } else { seqReader.Advance(1); } } if (seqReader.Length == totalConsumed) { examined = consumed = buffer.End; } else { consumed = buffer.GetPosition(totalConsumed); } }