Refactor server socket management for Linux support.

Build/MQTTnet.nuspec

@@ -28,6 +28,7 @@
 * [Server] Rewritten the _ConnectedClients_ API and added new features for disconnecting and Endpoint information (IP etc.).
 * [Server] Added settings for disabling persistent sessions and defining a max pending messages queue size per session.
 * [Server] Added a new interceptor which is invoked before a new message is added to the client queue.
+* [Server] Added support for Linux servers by dividing IPv4 and IPv6 support and adding new options (BREAKING CHANGE!).
     </releaseNotes>
     <copyright>Copyright Christian Kratky 2016-2018</copyright>
     <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags> 

Extensions/MQTTnet.Extensions.ManagedClient/MQTTnet.Extensions.ManagedClient.csproj

@@ -25,7 +25,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

Extensions/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj

@@ -25,7 +25,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

Frameworks/MQTTnet.AspnetCore/MQTTnet.AspnetCore.csproj

@@ -22,7 +22,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

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

@@ -38,8 +38,8 @@ namespace MQTTnet.Implementations
                 _defaultEndpointSocket.Control.KeepAlive = true;
                 _defaultEndpointSocket.Control.QualityOfService = SocketQualityOfService.LowLatency;
                 _defaultEndpointSocket.ConnectionReceived += AcceptDefaultEndpointConnectionsAsync;
-
-                await _defaultEndpointSocket.BindServiceNameAsync(options.GetDefaultEndpointPort().ToString(), SocketProtectionLevel.PlainSocket);
+                
+                await _defaultEndpointSocket.BindServiceNameAsync(options.DefaultEndpointOptions.Port.ToString(), SocketProtectionLevel.PlainSocket);
                 
             }
 

Frameworks/MQTTnet.NetStandard/Implementations/MqttTcpServerAdapter.cs

@@ -1,28 +1,23 @@
 #if NET452 || NET461 || NETSTANDARD1_3 || NETSTANDARD2_0
 using System;
-using System.Net;
-using System.Net.Security;
+using System.Collections.Generic;
 using System.Net.Sockets;
-using System.Security.Authentication;
 using System.Security.Cryptography.X509Certificates;
 using System.Threading;
 using System.Threading.Tasks;
 using MQTTnet.Adapter;
 using MQTTnet.Diagnostics;
-using MQTTnet.Serializer;
 using MQTTnet.Server;
 
 namespace MQTTnet.Implementations
 {
     public class MqttTcpServerAdapter : IMqttServerAdapter
     {
+        private readonly List<MqttTcpServerListener> _listeners = new List<MqttTcpServerListener>();
         private readonly IMqttNetChildLogger _logger;
-
+        
         private CancellationTokenSource _cancellationTokenSource;
-        private Socket _defaultEndpointSocket;
-        private Socket _tlsEndpointSocket;
-        private X509Certificate2 _tlsCertificate;
-
+        
         public MqttTcpServerAdapter(IMqttNetChildLogger logger)
         {
             if (logger == null) throw new ArgumentNullException(nameof(logger));
@@ -40,13 +35,7 @@ namespace MQTTnet.Implementations
 
             if (options.DefaultEndpointOptions.IsEnabled)
             {
-                _defaultEndpointSocket = new Socket(SocketType.Stream, ProtocolType.Tcp) { NoDelay = true };
-
-                _defaultEndpointSocket.Bind(new IPEndPoint(options.DefaultEndpointOptions.BoundIPAddress, options.GetDefaultEndpointPort()));
-                _defaultEndpointSocket.Listen(options.ConnectionBacklog);
-
-                Task.Run(() => AcceptDefaultEndpointConnectionsAsync(_cancellationTokenSource.Token),
-                    _cancellationTokenSource.Token);
+                RegisterListeners(options.DefaultEndpointOptions);
             }
 
             if (options.TlsEndpointOptions.IsEnabled)
@@ -56,19 +45,13 @@ namespace MQTTnet.Implementations
                     throw new ArgumentException("TLS certificate is not set.");
                 }
 
-                _tlsCertificate = new X509Certificate2(options.TlsEndpointOptions.Certificate);
-                if (!_tlsCertificate.HasPrivateKey)
+                var tlsCertificate = new X509Certificate2(options.TlsEndpointOptions.Certificate);
+                if (!tlsCertificate.HasPrivateKey)
                 {
                     throw new InvalidOperationException("The certificate for TLS encryption must contain the private key.");
                 }
 
-                _tlsEndpointSocket = new Socket(SocketType.Stream, ProtocolType.Tcp);
-                _tlsEndpointSocket.Bind(new IPEndPoint(options.TlsEndpointOptions.BoundIPAddress, options.GetTlsEndpointPort()));
-                _tlsEndpointSocket.Listen(options.ConnectionBacklog);
-
-                Task.Run(
-                    () => AcceptTlsEndpointConnectionsAsync(_cancellationTokenSource.Token),
-                    _cancellationTokenSource.Token);
+                RegisterListeners(options.TlsEndpointOptions);
             }
 
             return Task.FromResult(0);
@@ -76,93 +59,60 @@ namespace MQTTnet.Implementations
 
         public Task StopAsync()
         {
-            _cancellationTokenSource?.Cancel(false);
-            _cancellationTokenSource?.Dispose();
-            _cancellationTokenSource = null;
-
-            _defaultEndpointSocket?.Dispose();
-            _defaultEndpointSocket = null;
-
-            _tlsCertificate = null;
-
-            _tlsEndpointSocket?.Dispose();
-            _tlsEndpointSocket = null;
-
+            Dispose();
             return Task.FromResult(0);
         }
 
         public void Dispose()
         {
-            StopAsync().GetAwaiter().GetResult();
+            _cancellationTokenSource?.Cancel(false);
+            _cancellationTokenSource?.Dispose();
+            _cancellationTokenSource = null;
+
+            foreach (var listener in _listeners)
+            {
+                listener.Dispose();
+            }
+
+            _listeners.Clear();
         }
 
-        private async Task AcceptDefaultEndpointConnectionsAsync(CancellationToken cancellationToken)
+        private void RegisterListeners(MqttServerTcpEndpointBaseOptions options)
         {
-            while (!cancellationToken.IsCancellationRequested)
+            var tlsOptions = options as MqttServerTlsTcpEndpointOptions;
+
+            X509Certificate2 tlsCertificate = null;
+            if (tlsOptions != null)
             {
-                try
-                {
-                    //todo: else branch can be used with min dependency NET46
-#if NET452 || NET461
-                    var clientSocket = await Task.Factory.FromAsync(_defaultEndpointSocket.BeginAccept, _defaultEndpointSocket.EndAccept, null).ConfigureAwait(false);
-#else
-                    var clientSocket = await _defaultEndpointSocket.AcceptAsync().ConfigureAwait(false);
-#endif
-                    clientSocket.NoDelay = true;
-
-                    var clientAdapter = new MqttChannelAdapter(new MqttTcpChannel(clientSocket, null), new MqttPacketSerializer(), _logger);
-                    ClientAccepted?.Invoke(this, new MqttServerAdapterClientAcceptedEventArgs(clientAdapter));
-                }
-                catch (ObjectDisposedException)
-                {
-                    // It can happen that the listener socket is accessed after the cancellation token is already set and the listener socket is disposed.
-                }
-                catch (Exception exception)
-                {
-                    if (exception is SocketException s && s.SocketErrorCode == SocketError.OperationAborted)
-                    {
-                        return;
-                    }
-
-                    _logger.Error(exception, "Error while accepting connection at default endpoint.");
-                    await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken).ConfigureAwait(false);
-                }
+                tlsCertificate = new X509Certificate2(tlsOptions.Certificate);
             }
+
+            var listenerV4 = new MqttTcpServerListener(
+                AddressFamily.InterNetwork,
+                options,
+                tlsCertificate,
+                _cancellationTokenSource.Token,
+                _logger);
+
+            listenerV4.ClientAccepted += OnClientAccepted;
+            listenerV4.Start();
+            _listeners.Add(listenerV4);
+            
+            var listenerV6 = new MqttTcpServerListener(
+                AddressFamily.InterNetworkV6,
+                options,
+                tlsCertificate,
+                _cancellationTokenSource.Token,
+                _logger);
+
+            listenerV6.ClientAccepted += OnClientAccepted;
+            listenerV6.Start();
+            _listeners.Add(listenerV6);
         }
 
-        private async Task AcceptTlsEndpointConnectionsAsync(CancellationToken cancellationToken)
+        private void OnClientAccepted(object sender, MqttServerAdapterClientAcceptedEventArgs e)
         {
-            while (!cancellationToken.IsCancellationRequested)
-            {
-                try
-                {
-#if NET452 || NET461
-                    var clientSocket = await Task.Factory.FromAsync(_tlsEndpointSocket.BeginAccept, _tlsEndpointSocket.EndAccept, null).ConfigureAwait(false);
-#else
-                    var clientSocket = await _tlsEndpointSocket.AcceptAsync().ConfigureAwait(false);
-#endif
-
-                    var sslStream = new SslStream(new NetworkStream(clientSocket));
-                    await sslStream.AuthenticateAsServerAsync(_tlsCertificate, false, SslProtocols.Tls12, false).ConfigureAwait(false);
-
-                    var clientAdapter = new MqttChannelAdapter(new MqttTcpChannel(clientSocket, sslStream), new MqttPacketSerializer(), _logger);
-                    ClientAccepted?.Invoke(this, new MqttServerAdapterClientAcceptedEventArgs(clientAdapter));
-                }
-                catch (ObjectDisposedException)
-                {
-                    // It can happen that the listener socket is accessed after the cancellation token is already set and the listener socket is disposed.
-                }
-                catch (Exception exception)
-                {
-                    if (exception is SocketException s && s.SocketErrorCode == SocketError.OperationAborted)
-                    {
-                        return;
-                    }
-
-                    _logger.Error(exception, "Error while accepting connection at TLS endpoint.");
-                    await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken).ConfigureAwait(false);
-                }
-            }
+            ClientAccepted?.Invoke(this, e);
         }
     }
 }

Frameworks/MQTTnet.NetStandard/Implementations/MqttTcpServerListener.cs

@@ -0,0 +1,109 @@
+#if NET452 || NET461 || NETSTANDARD1_3 || NETSTANDARD2_0
+using System;
+using System.Net;
+using System.Net.Security;
+using System.Net.Sockets;
+using System.Security.Authentication;
+using System.Security.Cryptography.X509Certificates;
+using System.Threading;
+using System.Threading.Tasks;
+using MQTTnet.Adapter;
+using MQTTnet.Diagnostics;
+using MQTTnet.Serializer;
+using MQTTnet.Server;
+
+namespace MQTTnet.Implementations
+{
+    public class MqttTcpServerListener : IDisposable
+    {
+        private readonly IMqttNetChildLogger _logger;
+        private readonly CancellationToken _cancellationToken;
+        private readonly AddressFamily _addressFamily;
+        private readonly MqttServerTcpEndpointBaseOptions _options;
+        private readonly X509Certificate2 _tlsCertificate;
+
+        private Socket _socket;
+
+        public MqttTcpServerListener(
+            AddressFamily addressFamily,
+            MqttServerTcpEndpointBaseOptions options,
+            X509Certificate2 tlsCertificate,
+            CancellationToken cancellationToken,
+            IMqttNetChildLogger logger)
+        {
+            _addressFamily = addressFamily;
+            _options = options;
+            _tlsCertificate = tlsCertificate;
+            _cancellationToken = cancellationToken;
+            _logger = logger.CreateChildLogger(nameof(MqttTcpServerListener));
+        }
+
+        public event EventHandler<MqttServerAdapterClientAcceptedEventArgs> ClientAccepted;
+
+        public void Start()
+        {
+            var boundIp = _options.BoundInterNetworkAddress;
+            if (_addressFamily == AddressFamily.InterNetworkV6)
+            {
+                boundIp = _options.BoundInterNetworkV6Address;
+            }
+
+            _socket = new Socket(_addressFamily, SocketType.Stream, ProtocolType.Tcp);
+            _socket.Bind(new IPEndPoint(boundIp, _options.Port));
+
+            _logger.Info($"Starting TCP listener for {_socket.LocalEndPoint} TLS={_tlsCertificate != null}.");
+
+            _socket.Listen(_options.ConnectionBacklog);
+            Task.Run(AcceptClientConnectionsAsync, _cancellationToken);
+        }
+
+        private async Task AcceptClientConnectionsAsync()
+        {
+            while (!_cancellationToken.IsCancellationRequested)
+            {
+                try
+                {
+#if NET452 || NET461
+                    var clientSocket = await Task.Factory.FromAsync(_socket.BeginAccept, _socket.EndAccept, null).ConfigureAwait(false);
+#else
+                    var clientSocket = await _socket.AcceptAsync().ConfigureAwait(false);
+#endif
+                    clientSocket.NoDelay = true;
+
+                    if (_tlsCertificate != null)
+                    {
+                        var sslStream = new SslStream(new NetworkStream(clientSocket), false);
+                        await sslStream.AuthenticateAsServerAsync(_tlsCertificate, false, SslProtocols.Tls12, false).ConfigureAwait(false);
+                    }
+
+                    var clientAdapter = new MqttChannelAdapter(new MqttTcpChannel(clientSocket, null), new MqttPacketSerializer(), _logger);
+                    ClientAccepted?.Invoke(this, new MqttServerAdapterClientAcceptedEventArgs(clientAdapter));
+                }
+                catch (ObjectDisposedException)
+                {
+                    // It can happen that the listener socket is accessed after the cancellation token is already set and the listener socket is disposed.
+                }
+                catch (Exception exception)
+                {
+                    if (exception is SocketException s && s.SocketErrorCode == SocketError.OperationAborted)
+                    {
+                        return;
+                    }
+
+                    _logger.Error(exception, $"Error while accepting connection at TCP listener {_socket.LocalEndPoint} TLS={_tlsCertificate != null}.");
+                    await Task.Delay(TimeSpan.FromSeconds(1), _cancellationToken).ConfigureAwait(false);
+                }
+            }
+        }
+
+        public void Dispose()
+        {
+            _socket?.Dispose();
+
+#if NETSTANDARD1_3 || NETSTANDARD2_0 || NET461
+            _tlsCertificate?.Dispose();
+#endif
+        }
+    }
+}
+#endif

Frameworks/MQTTnet.NetStandard/Server/IMqttServerOptions.cs

@@ -4,8 +4,6 @@ namespace MQTTnet.Server
 {
     public interface IMqttServerOptions
     {
-        int ConnectionBacklog { get; }
-
         bool EnablePersistentSessions { get; }
 
         int MaxPendingMessagesPerClient { get; }
@@ -18,8 +16,8 @@ namespace MQTTnet.Server
         Action<MqttApplicationMessageInterceptorContext> ApplicationMessageInterceptor { get; }
         Action<MqttClientMessageQueueInterceptorContext> ClientMessageQueueInterceptor { get; set; }
 
-        MqttServerDefaultEndpointOptions DefaultEndpointOptions { get; }
-        MqttServerTlsEndpointOptions TlsEndpointOptions { get; }
+        MqttServerTcpEndpointOptions DefaultEndpointOptions { get; }
+        MqttServerTlsTcpEndpointOptions TlsEndpointOptions { get; }
 
         IMqttServerStorage Storage { get; }
     }

Frameworks/MQTTnet.NetStandard/Server/MqttServerDefaultEndpointOptions.cs

@@ -1,13 +0,0 @@
-using System.Net;
-
-namespace MQTTnet.Server
-{
-    public class MqttServerDefaultEndpointOptions
-    {
-        public bool IsEnabled { get; set; } = true;
-
-        public int? Port { get; set; }
-
-        public IPAddress BoundIPAddress { get; set; } = IPAddress.Any;
-    }
-}

Frameworks/MQTTnet.NetStandard/Server/MqttServerOptions.cs

@@ -4,14 +4,12 @@ namespace MQTTnet.Server
 {
     public class MqttServerOptions : IMqttServerOptions
     {
-        public MqttServerDefaultEndpointOptions DefaultEndpointOptions { get; } = new MqttServerDefaultEndpointOptions();
+        public MqttServerTcpEndpointOptions DefaultEndpointOptions { get; } = new MqttServerTcpEndpointOptions();
 
-        public MqttServerTlsEndpointOptions TlsEndpointOptions { get; } = new MqttServerTlsEndpointOptions();
+        public MqttServerTlsTcpEndpointOptions TlsEndpointOptions { get; } = new MqttServerTlsTcpEndpointOptions();
 
         public bool EnablePersistentSessions { get; set; }
 
-        public int ConnectionBacklog { get; set; } = 10;
-
         public int MaxPendingMessagesPerClient { get; set; } = 250;
         public MqttPendingMessagesOverflowStrategy PendingMessagesOverflowStrategy { get; set; } = MqttPendingMessagesOverflowStrategy.DropOldestQueuedMessage;
 

Frameworks/MQTTnet.NetStandard/Server/MqttServerOptionsBuilder.cs

@@ -9,7 +9,8 @@ namespace MQTTnet.Server
 
         public MqttServerOptionsBuilder WithConnectionBacklog(int value)
         {
-            _options.ConnectionBacklog = value;
+            _options.DefaultEndpointOptions.ConnectionBacklog = value;
+            _options.TlsEndpointOptions.ConnectionBacklog = value;
             return this;
         }
 
@@ -31,7 +32,7 @@ namespace MQTTnet.Server
             return this;
         }
 
-        public MqttServerOptionsBuilder WithDefaultEndpointPort(int? value)
+        public MqttServerOptionsBuilder WithDefaultEndpointPort(int value)
         {
             _options.DefaultEndpointOptions.Port = value;
             return this;
@@ -39,10 +40,16 @@ namespace MQTTnet.Server
 
         public MqttServerOptionsBuilder WithDefaultEndpointBoundIPAddress(IPAddress value)
         {
-            _options.DefaultEndpointOptions.BoundIPAddress = value ?? IPAddress.Any;
+            _options.DefaultEndpointOptions.BoundInterNetworkAddress = value ?? IPAddress.Any;
             return this;
         }
-        
+
+        public MqttServerOptionsBuilder WithDefaultEndpointBoundIPV6Address(IPAddress value)
+        {
+            _options.DefaultEndpointOptions.BoundInterNetworkV6Address = value ?? IPAddress.Any;
+            return this;
+        }
+
         public MqttServerOptionsBuilder WithoutDefaultEndpoint()
         {
             _options.DefaultEndpointOptions.IsEnabled = false;
@@ -55,7 +62,7 @@ namespace MQTTnet.Server
             return this;
         }
 
-        public MqttServerOptionsBuilder WithEncryptedEndpointPort(int? value)
+        public MqttServerOptionsBuilder WithEncryptedEndpointPort(int value)
         {
             _options.TlsEndpointOptions.Port = value;
             return this;
@@ -63,7 +70,7 @@ namespace MQTTnet.Server
 
         public MqttServerOptionsBuilder WithEncryptedEndpointBoundIPAddress(IPAddress value)
         {
-            _options.TlsEndpointOptions.BoundIPAddress = value;
+            _options.TlsEndpointOptions.BoundInterNetworkAddress = value;
             return this;
         }
 

Frameworks/MQTTnet.NetStandard/Server/MqttServerOptionsExtensions.cs

@@ -1,31 +0,0 @@
-using System;
-
-namespace MQTTnet.Server
-{
-    public static class MqttServerOptionsExtensions
-    {
-        public static int GetTlsEndpointPort(this IMqttServerOptions options)
-        {
-            if (options == null) throw new ArgumentNullException(nameof(options));
-
-            if (!options.TlsEndpointOptions.Port.HasValue)
-            {
-                return 8883;
-            }
-
-            return options.TlsEndpointOptions.Port.Value;
-        }
-
-        public static int GetDefaultEndpointPort(this IMqttServerOptions options)
-        {
-            if (options == null) throw new ArgumentNullException(nameof(options));
-
-            if (!options.DefaultEndpointOptions.Port.HasValue)
-            {
-                return 1883;
-            }
-
-            return options.DefaultEndpointOptions.Port.Value;
-        }
-    }
-}

Frameworks/MQTTnet.NetStandard/Server/MqttServerTcpEndpointBaseOptions.cs

@@ -0,0 +1,17 @@
+using System.Net;
+
+namespace MQTTnet.Server
+{
+    public abstract class MqttServerTcpEndpointBaseOptions
+    {
+        public bool IsEnabled { get; set; }
+
+        public int Port { get; set; }
+
+        public int ConnectionBacklog { get; set; } = 10;
+
+        public IPAddress BoundInterNetworkAddress { get; set; } = IPAddress.Any;
+
+        public IPAddress BoundInterNetworkV6Address { get; set; } = IPAddress.IPv6Any;
+    }
+}

Frameworks/MQTTnet.NetStandard/Server/MqttServerTcpEndpointOptions.cs

@@ -0,0 +1,11 @@
+namespace MQTTnet.Server
+{
+    public class MqttServerTcpEndpointOptions : MqttServerTcpEndpointBaseOptions
+    {
+        public MqttServerTcpEndpointOptions()
+        {
+            IsEnabled = true;
+            Port = 1883;
+        }
+    }
+}

Frameworks/MQTTnet.NetStandard/Server/MqttServerTlsEndpointOptions.cs

@@ -1,15 +0,0 @@
-using System.Net;
-
-namespace MQTTnet.Server
-{
-    public class MqttServerTlsEndpointOptions
-    {
-        public bool IsEnabled { get; set; }
-
-        public int? Port { get; set; }
-
-        public byte[] Certificate { get; set; }
-
-        public IPAddress BoundIPAddress { get; set; } = IPAddress.Any;
-    }
-}

Frameworks/MQTTnet.NetStandard/Server/MqttServerTlsTcpEndpointOptions.cs

@@ -0,0 +1,12 @@
+namespace MQTTnet.Server
+{
+    public class MqttServerTlsTcpEndpointOptions : MqttServerTcpEndpointBaseOptions
+    {
+        public MqttServerTlsTcpEndpointOptions()
+        {
+            Port = 8883;
+        }
+
+        public byte[] Certificate { get; set; }
+    }
+}

MQTTnet.sln

@@ -11,7 +11,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Frameworks", "Frameworks",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MQTTnet.TestApp.UniversalWindows", "Tests\MQTTnet.TestApp.UniversalWindows\MQTTnet.TestApp.UniversalWindows.csproj", "{FF1F72D6-9524-4422-9497-3CC0002216ED}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet.NetStandard", "Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj", "{3587E506-55A2-4EB3-99C7-DC01E42D25D2}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MQTTnet", "Frameworks\MQTTnet.NetStandard\MQTTnet.csproj", "{3587E506-55A2-4EB3-99C7-DC01E42D25D2}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Build", "Build", "{67C28AC1-BC3A-420A-BE9C-FA2401431CF9}"
 	ProjectSection(SolutionItems) = preProject

Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

Tests/MQTTnet.Benchmarks/Tcp/TcpConnection.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.IO.Pipelines;
 using System.Net;
@@ -21,7 +20,7 @@ namespace MQTTnet.Benchmarks.Tcp
 
         public TcpConnection(EndPoint endPoint)
         {
-            _socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
+            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             _endPoint = endPoint;
 
             _sender = new SocketSender(_socket, PipeScheduler.ThreadPool);

Tests/MQTTnet.Core.Tests/MQTTnet.Core.Tests.csproj

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\Extensions\MQTTnet.Extensions.ManagedClient\MQTTnet.Extensions.ManagedClient.csproj" />
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.NetStandard.csproj" />
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj" />
   </ItemGroup>
 
 </Project>

Tests/MQTTnet.TestApp.NetCore/PerformanceTest.cs

@@ -18,6 +18,7 @@ namespace MQTTnet.TestApp.NetCore
             var concurrent = Console.ReadKey(true).KeyChar == 'c';
 
             var server = Task.Run(RunServerAsync);
+            await Task.Delay(1000);
             var client = Task.Run(() => RunClientAsync(2000, TimeSpan.FromMilliseconds(10), concurrent));
 
             await Task.WhenAll(server, client).ConfigureAwait(false);

Tests/MQTTnet.TestApp.UniversalWindows/MQTTnet.TestApp.UniversalWindows.csproj

@@ -135,9 +135,9 @@
       <Project>{c444e9c8-95fa-430e-9126-274129de16cd}</Project>
       <Name>MQTTnet.Extensions.Rpc</Name>
     </ProjectReference>
-    <ProjectReference Include="..\..\Frameworks\MQTTnet.Netstandard\MQTTnet.NetStandard.csproj">
+    <ProjectReference Include="..\..\Frameworks\MQTTnet.NetStandard\MQTTnet.csproj">
       <Project>{3587e506-55a2-4eb3-99c7-dc01e42d25d2}</Project>
-      <Name>MQTTnet.NetStandard</Name>
+      <Name>MQTTnet</Name>
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>