Fix broken UWP support.

Frameworks/MQTTnet.NetStandard/Implementations/MqttTcpChannel.Uwp.cs

@@ -37,6 +37,8 @@ namespace MQTTnet.Implementations
         public MqttTcpChannel(StreamSocket socket)
         {
             _socket = socket ?? throw new ArgumentNullException(nameof(socket));
+
+            CreateStreams();
         }
 
         public static Func<MqttClientTcpOptions, IEnumerable<ChainValidationResult>> CustomIgnorableServerCertificateErrorsResolver { get; set; }
@@ -65,8 +67,7 @@ namespace MQTTnet.Implementations
                 await _socket.ConnectAsync(new HostName(_options.Server), _options.GetPort().ToString(), SocketProtectionLevel.Tls12);
             }
 
-            _readStream = _socket.InputStream.AsStreamForRead(_bufferSize);
-            _writeStream = _socket.OutputStream.AsStreamForWrite(_bufferSize);
+            CreateStreams();
         }
 
         public Task DisconnectAsync()
@@ -177,6 +178,12 @@ namespace MQTTnet.Implementations
 
             return result;
         }
+
+        private void CreateStreams()
+        {
+            _readStream = _socket.InputStream.AsStreamForRead(_bufferSize);
+            _writeStream = _socket.OutputStream.AsStreamForWrite(_bufferSize);
+        }
     }
 }
 #endif

Frameworks/MQTTnet.NetStandard/Implementations/MqttTcpServerAdapter.Uwp.cs

@@ -26,10 +26,14 @@ namespace MQTTnet.Implementations
             if (options == null) throw new ArgumentNullException(nameof(options));
 
             if (_defaultEndpointSocket != null) throw new InvalidOperationException("Server is already started.");
-            
+
             if (options.DefaultEndpointOptions.IsEnabled)
             {
                 _defaultEndpointSocket = new StreamSocketListener();
+
+                // This also affects the client sockets.
+                _defaultEndpointSocket.Control.NoDelay = true;
+
                 await _defaultEndpointSocket.BindServiceNameAsync(options.GetDefaultEndpointPort().ToString(), SocketProtectionLevel.PlainSocket);
                 _defaultEndpointSocket.ConnectionReceived += AcceptDefaultEndpointConnectionsAsync;
             }
@@ -62,8 +66,6 @@ namespace MQTTnet.Implementations
         {
             try
             {
-                args.Socket.Control.NoDelay = true;
-
                 var clientAdapter = new MqttChannelAdapter(new MqttTcpChannel(args.Socket), new MqttPacketSerializer(), _logger);
                 ClientAccepted?.Invoke(this, new MqttServerAdapterClientAcceptedEventArgs(clientAdapter));
             }