public static ISCPMessage Parse(byte[] buf) { if (buf.Take(4).SequenceEqual(Magic)) { // ISCP var messageSize = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buf, 8)); var msg = Encoding.ASCII.GetString(buf, 16, messageSize); var end = msg.IndexOfAny(new[] { (char)0x0a, (char)0x0d, (char)0x1a }); msg = msg.Substring(2, end - 2); // remove !1 and EOF return(ISCPMessage.Parse(msg)); } return(null); }
private void MessageReceiveListener(object obj) { var readBuf = new byte[2048]; int startIndex = 0; while (_listenerCancellationToken.IsCancellationRequested == false) { try { _messageProcessingResetEvent.Set(); var readTask = _networkStream.ReadAsync(readBuf, startIndex, readBuf.Length - startIndex, _listenerCancellationToken.Token); int read = readTask.Result; _messageProcessingResetEvent.Reset(); // detect ISCP blocks int endIndex = 0; for (int i = 0; i < read - 4; i++) { try { // message start with ISCP if (readBuf.Skip(i).Take(4).SequenceEqual(ISCPMessage.Magic)) { startIndex = i; var messageSize = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(readBuf, startIndex + 8)); endIndex = startIndex + 16 + messageSize; var msgString = Encoding.ASCII.GetString(readBuf, startIndex + 16, messageSize); i = endIndex - 1; var msg = ISCPMessage.Parse(msgString); if (msg != null) { System.Diagnostics.Trace.WriteLine($"{DateTime.Now:O} Received {msg.ToString()}"); MessageReceived?.Invoke(this, new ISCPMessageEventArgs() { Message = msg }); } } } catch (Exception exp) { System.Diagnostics.Trace.Fail("Failed extracting ISCP message", exp.ToString()); // just try next byte } } if (endIndex < read) { // still some uncompleted messages in remaining buffer startIndex = read - endIndex; readBuf.Skip(endIndex).Take(startIndex).ToArray().CopyTo(readBuf, 0); // copy to start of buf } else { startIndex = 0; } } catch (AggregateException exp) { if (!(exp.InnerException is OperationCanceledException)) { System.Diagnostics.Trace.Fail($"Error reading message.", exp.ToString()); } } catch (Exception exp) { System.Diagnostics.Trace.Fail($"Error parsing message.", exp.ToString()); } } }
/// <summary> /// Try to find ISCP devices on network. /// </summary> public static Task <List <ReceiverInfo> > DiscoverAsync(int millisecondsTimeout = 5000) { return(Task.Run(() => { int onkyoPort = 60128; byte[] onkyoMagic = new ISCPMessage("ECNQSTN").GetBytes("!x"); var foundReceivers = new List <ReceiverInfo>(); IEnumerable <string> ips = GetInterfaceAddresses(); // Broadcast magic Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); using (socket) { socket.Blocking = false; // So we can use Poll socket.EnableBroadcast = true; socket.Bind(new IPEndPoint(IPAddress.Any, 0)); foreach (var i in ips) { try { var ip = IPAddress.Parse(i); socket.SendTo(onkyoMagic, new IPEndPoint(ip, onkyoPort)); } catch (SocketException) { } } EndPoint addr = new IPEndPoint(IPAddress.Broadcast, onkyoPort); byte[] data = new byte[1024]; int read = 0; while (true) { int microsecondTimeout = (int)(millisecondsTimeout * 1000); if (!socket.Poll(microsecondTimeout, SelectMode.SelectRead)) { break; } read = socket.ReceiveFrom(data, ref addr); var msg = ISCPMessage.Parse(data); // Return string looks something like this: // !1ECNTX-NR609/60128/DX GroupCollection info = Regex.Match(msg.ToString(), //@"!" + //@"(?<device_category>\d)" + @"ECN" + @"(?<model_name>[^/]*)/" + @"(?<iscp_port>\d{5})/" + @"(?<area_code>\w{2})/" + @"(?<identifier>.*)" ).Groups; IPAddress adr = (addr as IPEndPoint).Address; if (!foundReceivers.Any(p => p.IPAddress == adr)) { var ri = new ReceiverInfo { Port = Int32.Parse(info["iscp_port"].Value), Model = info["model_name"].Value, IPAddress = adr }; foundReceivers.Add(ri); } } } return foundReceivers; })); }
public async Task <ISCPMessage> SendCommandAsync(string message) { var m = ISCPMessage.Parse(message); return(await SendCommandAsync(m)); }