public static List <(string ip, string type, string serial, string token)> SendDiscoverMessage(int port = 54321)
{
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, MESSAGES_TIMEOUT);
socket.Bind(new IPEndPoint(IPAddress.Any, 0));
socket.SendTo(HELLO_REQUEST.ToByteArray(), new IPEndPoint(IPAddress.Broadcast, port));
var discoveredDevices = new List <(string ip, string type, string serial, string token)>();
try
{
var buffer = new byte[4096];
var bytesRead = 0;
EndPoint endPoint = new IPEndPoint(IPAddress.Any, 0);
while ((bytesRead = socket.ReceiveFrom(buffer, ref endPoint)) > 0)
{
var ip = ((IPEndPoint)endPoint).Address.ToString();
var packet = new MiioPacket(new ArraySegment <byte>(buffer, 0, bytesRead).ToArray().ToHex());
discoveredDevices.Add((ip, packet.GetDeviceType(), packet.GetSerial(), packet.GetChecksum()));
}
}
catch { } // Normal situation, no more data in socket
socket.Close();
return(discoveredDevices);
}
private async Task SendHelloPacketIfNeededAsync()
{
if (initialPacket == null)
{
await _udpClient.SendAsync(HELLO_REQUEST.ToByteArray(), _endpoint).ConfigureAwait(false);
var receviedHello = (await _udpClient.ReceiveAsync().ConfigureAwait(false)).Buffer;
if (receviedHello.Length != 32) // hello response message must be 32 bytes
{
throw _helloException;
}
initialPacket = new MiioPacket(receviedHello.ToHex());
}
}
private void SendHelloPacketIfNeeded()
{
if (initialPacket == null)
{
_udpClient.SendTo(HELLO_REQUEST.ToByteArray(), _endpoint);
var receviedHello = _udpClient.Receive(ref _endpoint);
if (receviedHello.Length != 32) // hello response message must be 32 bytes
{
throw _helloException;
}
initialPacket = new MiioPacket(receviedHello.ToHex());
}
}
public async Task <string> SendMessageAsync(string msg)
{
try
{
await SendHelloPacketIfNeededAsync().ConfigureAwait(false);
var requestHex = initialPacket.BuildMessage(msg, _token);
await _udpClient.SendAsync(requestHex.ToByteArray(), _endpoint).ConfigureAwait(false);
var responseHex = (await _udpClient.ReceiveAsync().ConfigureAwait(false)).Buffer.ToHex();
var miioPacket = new MiioPacket(responseHex);
return(miioPacket.GetResponseData(_token));
}
catch (TimeoutException)
{
throw _timeoutException;
}
}
public string SendMessage(string msg)
{
try
{
SendHelloPacketIfNeeded();
var requestHex = initialPacket.BuildMessage(msg, _token);
_udpClient.SendTo(requestHex.ToByteArray(), _endpoint);
var responseHex = _udpClient.Receive(ref _endpoint).ToHex();
var miioPacket = new MiioPacket(responseHex);
return(miioPacket.GetResponseData(_token));
}
catch (TimeoutException)
{
throw _timeoutException;
}
}