Add QuicConnection.IsQuicSupported for runtime feature detection

src/libraries/System.Net.Quic/ref/System.Net.Quic.cs

@@ -27,6 +27,7 @@ public QuicConnection(IPEndPoint remoteEndPoint, System.Net.Security.SslClientAu
         public System.Net.Security.SslApplicationProtocol NegotiatedApplicationProtocol => throw null;
         public ValueTask CloseAsync(long errorCode, System.Threading.CancellationToken cancellationToken = default) => throw null;
         public void Dispose() => throw null;
+        public static bool IsQuicSupported => throw null;
     }
     public sealed partial class QuicListener : IDisposable
     {

src/libraries/System.Net.Quic/src/Resources/Strings.resx

@@ -1,4 +1,64 @@
-<root>
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
     <xsd:element name="root" msdata:IsDataSet="true">
@@ -57,8 +117,10 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-
+  <data name="net_quic_notsupported" xml:space="preserve">
+    <value>QUIC is not supported on this platform. See http://aka.ms/dotnetquic</value>
+  </data>
   <data name="net_quic_placeholdertext" xml:space="preserve">
     <value>Placeholder text</value>
   </data>
-</root>
+</root>

src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/Internal/MsQuicApi.cs

@@ -2,6 +2,8 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.IO;
+using System.Net.Security;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
@@ -17,9 +19,20 @@ internal class MsQuicApi : IDisposable
 
         private unsafe MsQuicApi()
         {
-            QuicExceptionHelpers.ThrowIfFailed(
-                Interop.MsQuic.MsQuicOpen(version: 1, out MsQuicNativeMethods.NativeApi* registration),
-                "Could not open MsQuic.");
+            MsQuicNativeMethods.NativeApi* registration;
+
+            try
+            {
+                uint status = Interop.MsQuic.MsQuicOpen(version: 1, out registration);
+                if (!MsQuicStatusHelper.SuccessfulStatusCode(status))
+                {
+                    throw new NotSupportedException(SR.net_quic_notsupported);
+                }
+            }
+            catch (DllNotFoundException)
+            {
+                throw new NotSupportedException(SR.net_quic_notsupported);
+            }
 
             MsQuicNativeMethods.NativeApi nativeRegistration = *registration;
 
@@ -114,7 +127,40 @@ private unsafe MsQuicApi()
             _registrationContext = ctx;
         }
 
-        internal static MsQuicApi Api { get; } = new MsQuicApi();
+        internal static MsQuicApi Api { get; }
+
+        internal static bool IsQuicSupported { get; }
+
+        static MsQuicApi()
+        {
+            // MsQuicOpen will succeed even if the platform will not support it. It will then fail with unspecified
+            // platform-specific errors in subsequent callbacks. For now, check for the minimum build we've tested it on.
+
+            // TODO:
+            // - Hopefully, MsQuicOpen will perform this check for us and give us a consistent error code.
+            // - Otherwise, dial this in to reflect actual minimum requirements and add some sort of platform
+            //   error code mapping when creating exceptions.
+
+            OperatingSystem ver = Environment.OSVersion;
+
+            if (ver.Platform == PlatformID.Win32NT && ver.Version < new Version(10, 0, 19041, 0))
+            {
+                IsQuicSupported = false;
+                return;
+            }
+
+            // TODO: try to initialize TLS 1.3 in SslStream.
+
+            try
+            {
+                Api = new MsQuicApi();
+                IsQuicSupported = true;
+            }
+            catch (NotSupportedException)
+            {
+                IsQuicSupported = false;
+            }
+        }
 
         internal MsQuicNativeMethods.RegistrationOpenDelegate RegistrationOpenDelegate { get; }
         internal MsQuicNativeMethods.RegistrationCloseDelegate RegistrationCloseDelegate { get; }

src/libraries/System.Net.Quic/src/System/Net/Quic/Implementations/MsQuic/Internal/MsQuicSession.cs

@@ -12,6 +12,10 @@ internal sealed class MsQuicSession : IDisposable
 
         internal MsQuicSession()
         {
+            if (!MsQuicApi.IsQuicSupported)
+            {
+                throw new NotSupportedException(SR.net_quic_notsupported);
+            }
         }
 
         public IntPtr ConnectionOpen(QuicClientConnectionOptions options)

src/libraries/System.Net.Quic/src/System/Net/Quic/QuicConnection.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System.Net.Quic.Implementations;
+using System.Net.Quic.Implementations.MsQuic.Internal;
 using System.Net.Security;
 using System.Threading;
 using System.Threading.Tasks;
@@ -13,6 +14,8 @@ public sealed class QuicConnection : IDisposable
     {
         private readonly QuicConnectionProvider _provider;
 
+        public static bool IsQuicSupported => MsQuicApi.IsQuicSupported;
+
         /// <summary>
         /// Create an outbound QUIC connection.
         /// </summary>

src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs

@@ -13,11 +13,12 @@
 
 namespace System.Net.Quic.Tests
 {
+    [ConditionalClass(typeof(QuicConnection), nameof(QuicConnection.IsQuicSupported))]
     public class MsQuicTests : MsQuicTestBase
     {
         private static ReadOnlyMemory<byte> s_data = Encoding.UTF8.GetBytes("Hello world!");
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task BasicTest()
         {
             for (int i = 0; i < 100; i++)
@@ -62,7 +63,7 @@ public async Task BasicTest()
             }
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task MultipleReadsAndWrites()
         {
             for (int j = 0; j < 100; j++)
@@ -127,7 +128,7 @@ public async Task MultipleReadsAndWrites()
             }
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task MultipleStreamsOnSingleConnection()
         {
             Task listenTask = Task.Run(async () =>
@@ -209,7 +210,7 @@ public async Task MultipleStreamsOnSingleConnection()
             await (new[] { listenTask, clientTask }).WhenAllOrAnyFailed(millisecondsTimeout: 60000);
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task AbortiveConnectionFromClient()
         {
             using QuicConnection clientConnection = CreateQuicConnection(DefaultListener.ListenEndPoint);
@@ -226,7 +227,7 @@ public async Task AbortiveConnectionFromClient()
             Assert.Throws<NullReferenceException>(() => stream.CanRead);
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task TestStreams()
         {
             using (QuicListener listener = new QuicListener(
@@ -264,7 +265,7 @@ public async Task TestStreams()
             }
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task UnidirectionalAndBidirectionalStreamCountsWork()
         {
             using QuicConnection clientConnection = CreateQuicConnection(DefaultListener.ListenEndPoint);
@@ -276,7 +277,7 @@ public async Task UnidirectionalAndBidirectionalStreamCountsWork()
             Assert.Equal(100, serverConnection.GetRemoteAvailableUnidirectionalStreamCount());
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task UnidirectionalAndBidirectionalChangeValues()
         {
             QuicClientConnectionOptions options = new QuicClientConnectionOptions()
@@ -298,7 +299,7 @@ public async Task UnidirectionalAndBidirectionalChangeValues()
             Assert.Equal(100, serverConnection.GetRemoteAvailableUnidirectionalStreamCount());
         }
 
-        [Fact(Skip = "MsQuic not available")]
+        [Fact]
         public async Task CallDifferentWriteMethodsWorks()
         {
             using QuicConnection clientConnection = CreateQuicConnection(DefaultListener.ListenEndPoint);
@@ -327,7 +328,7 @@ public async Task CallDifferentWriteMethodsWorks()
             Assert.Equal(24, res);
         }
 
-        [Theory(Skip = "MsQuic not available")]
+        [Theory]
         [MemberData(nameof(QuicStream_ReadWrite_Random_Success_Data))]
         public async Task QuicStream_ReadWrite_Random_Success(int readSize, int writeSize)
         {