Pass cancellation token to TCP listeners (#2082)

MQTTnet.sln.DotSettings

@@ -236,6 +236,7 @@ See the LICENSE file in the project root for more information.</s:String>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpPlaceEmbeddedOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpRenamePlacementToArrangementMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpUseContinuousIndentInsideBracesMigration/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002EMemberReordering_002EMigrations_002ECSharpFileLayoutPatternRemoveIsAttributeUpgrade/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAddAccessorOwnerDeclarationBracesMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAlwaysTreatStructAsNotReorderableMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>

Source/MQTTnet.Server/Internal/Adapter/MqttTcpServerListener.cs

@@ -136,7 +136,7 @@ namespace MQTTnet.Server.Internal.Adapter
             {
                 try
                 {
-                    var clientSocket = await _socket.AcceptAsync().ConfigureAwait(false);
+                    var clientSocket = await _socket.AcceptAsync(cancellationToken).ConfigureAwait(false);
                     if (clientSocket == null)
                     {
                         continue;

Source/MQTTnet.Tests/MqttTcpChannel_Tests.cs

@@ -2,78 +2,80 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using Microsoft.VisualStudio.TestTools.UnitTesting;
-using MQTTnet.Implementations;
 using System;
 using System.Net;
 using System.Net.Sockets;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using MQTTnet.Implementations;
 
-namespace MQTTnet.Tests
+namespace MQTTnet.Tests;
+
+[TestClass]
+public class MqttTcpChannel_Tests
 {
-    [TestClass]
-    public class MqttTcpChannel_Tests
+    [TestMethod]
+    public async Task Dispose_Channel_While_Used()
     {
-        [TestMethod]
-        public async Task Dispose_Channel_While_Used()
-        {
-            var ct = new CancellationTokenSource();
-            var serverSocket = new CrossPlatformSocket(AddressFamily.InterNetwork, ProtocolType.Tcp);
+        using var ct = new CancellationTokenSource();
+        using var serverSocket = new CrossPlatformSocket(AddressFamily.InterNetwork, ProtocolType.Tcp);
 
-            try
-            {
-                serverSocket.Bind(new IPEndPoint(IPAddress.Any, 50001));
-                serverSocket.Listen(0);
+        try
+        {
+            serverSocket.Bind(new IPEndPoint(IPAddress.Any, 50001));
+            serverSocket.Listen(0);
 
 #pragma warning disable 4014
-                Task.Run(async () =>
+            Task.Run(
+                async () =>
 #pragma warning restore 4014
                 {
                     while (!ct.IsCancellationRequested)
                     {
-                        var client = await serverSocket.AcceptAsync();
+                        var client = await serverSocket.AcceptAsync(CancellationToken.None);
                         var data = new byte[] { 128 };
                         await client.SendAsync(new ArraySegment<byte>(data), SocketFlags.None);
                     }
-                }, ct.Token);
+                },
+                ct.Token);
 
-                var clientSocket = new CrossPlatformSocket(AddressFamily.InterNetwork, ProtocolType.Tcp);
-                await clientSocket.ConnectAsync(new DnsEndPoint("localhost", 50001), CancellationToken.None);
+            using var clientSocket = new CrossPlatformSocket(AddressFamily.InterNetwork, ProtocolType.Tcp);
+            await clientSocket.ConnectAsync(new DnsEndPoint("localhost", 50001), CancellationToken.None);
 
-                var tcpChannel = new MqttTcpChannel(clientSocket.GetStream(), "test", null);
+            var tcpChannel = new MqttTcpChannel(clientSocket.GetStream(), "test", null);
 
-                await Task.Delay(100, ct.Token);
+            await Task.Delay(100, ct.Token);
 
-                var buffer = new byte[1];
-                await tcpChannel.ReadAsync(buffer, 0, 1, ct.Token);
+            var buffer = new byte[1];
+            await tcpChannel.ReadAsync(buffer, 0, 1, ct.Token);
 
-                Assert.AreEqual(128, buffer[0]);
+            Assert.AreEqual(128, buffer[0]);
 
-                // This block should fail after dispose.
+            // This block should fail after dispose.
 #pragma warning disable 4014
-                Task.Run(() =>
+            Task.Run(
+                () =>
 #pragma warning restore 4014
                 {
                     Task.Delay(200, ct.Token);
                     tcpChannel.Dispose();
-                }, ct.Token);
+                },
+                ct.Token);
 
-                try
-                {
-                    await tcpChannel.ReadAsync(buffer, 0, 1, CancellationToken.None);
-                }
-                catch (Exception exception)
-                {
-                    Assert.IsInstanceOfType(exception, typeof(SocketException));
-                    Assert.AreEqual(SocketError.OperationAborted, ((SocketException)exception).SocketErrorCode);
-                }
-            }
-            finally
+            try
             {
-                ct.Cancel(false);
-                serverSocket.Dispose();
+                await tcpChannel.ReadAsync(buffer, 0, 1, CancellationToken.None);
+            }
+            catch (Exception exception)
+            {
+                Assert.IsInstanceOfType(exception, typeof(SocketException));
+                Assert.AreEqual(SocketError.OperationAborted, ((SocketException)exception).SocketErrorCode);
             }
         }
+        finally
+        {
+            ct.Cancel(false);
+        }
     }
-}
+}

Source/MQTTnet/Implementations/CrossPlatformSocket.cs

@@ -108,11 +108,11 @@ public sealed class CrossPlatformSocket : IDisposable
         set => _socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.TcpKeepAliveTime, value);
     }
 
-    public async Task<CrossPlatformSocket> AcceptAsync()
+    public async Task<CrossPlatformSocket> AcceptAsync(CancellationToken cancellationToken)
     {
         try
         {
-            var clientSocket = await _socket.AcceptAsync().ConfigureAwait(false);
+            var clientSocket = await _socket.AcceptAsync(cancellationToken).ConfigureAwait(false);
             return new CrossPlatformSocket(clientSocket);
         }
         catch (ObjectDisposedException)