From 218a81116e6979f89e463318e3c8a1fe7648aa99 Mon Sep 17 00:00:00 2001 From: SilverFox Date: Sat, 22 May 2021 10:32:31 +0800 Subject: [PATCH] Avoid unnessary PlatformNotSupportedException when call EnableFastpath on win7 --- src/DotNetty.Transport/Channels/Sockets/SocketEx.cs | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/src/DotNetty.Transport/Channels/Sockets/SocketEx.cs b/src/DotNetty.Transport/Channels/Sockets/SocketEx.cs index 53ce879e0..5827731a1 100644 --- a/src/DotNetty.Transport/Channels/Sockets/SocketEx.cs +++ b/src/DotNetty.Transport/Channels/Sockets/SocketEx.cs @@ -27,6 +27,8 @@ namespace DotNetty.Transport.Channels.Sockets { public static class SocketEx { + private static readonly byte[] FastpathEnabled = BitConverter.GetBytes(1); + public static Socket CreateSocket() { // .Net45+，默认为AddressFamily.InterNetworkV6，并设置 DualMode 为 true，双线绑定 @@ -89,16 +91,20 @@ public static void SafeClose(this Socket socket) /// See https://blogs.technet.microsoft.com/wincat/2012/12/05/fast-tcp-loopback-performance-and-low-latency-with-windows-server-2012-tcp-loopback-fast-path/ /// for more information. /// The socket for which FastPath should be enabled. - /// Code take from Orleans(See https://github.com/dotnet/orleans/blob/master/src/Orleans.Core/Messaging/SocketExtensions.cs). + /// Code take from Orleans(See https://github.com/dotnet/orleans/blob/main/src/Orleans.Core/Networking/Shared/SocketExtensions.cs). internal static void EnableFastpath(this Socket socket) { if (!PlatformApis.IsWindows) { return; } const int SIO_LOOPBACK_FAST_PATH = -1744830448; - var optionInValue = BitConverter.GetBytes(1); try { - socket.IOControl(SIO_LOOPBACK_FAST_PATH, optionInValue, null); + // Win8/Server2012+ only + var osVersion = Environment.OSVersion.Version; + if (osVersion.Major > 6 || osVersion.Major == 6 && osVersion.Minor >= 2) + { + socket.IOControl(SIO_LOOPBACK_FAST_PATH, FastpathEnabled, null); + } } catch {