拦截tcp443的数据包

FastGithub.Configuration/HttpsReverseProxyPort.cs

@@ -1,21 +1,32 @@
-using FastGithub.Configuration;
+using System;
-using System;
 using System.Collections.Generic;
 using System.Net;
 using System.Net.NetworkInformation;
 using System.Net.Sockets;
 
-namespace FastGithub.HttpServer
+namespace FastGithub.Configuration
 {
     /// <summary>
     /// https反向代理端口
     /// </summary>
-    static class HttpsReverseProxyPort
+    public static class HttpsReverseProxyPort
     {
         /// <summary>
         /// 获取端口值
         /// </summary>
-        public static int Value { get; } = OperatingSystem.IsWindows() ? 443 : GetAvailableTcpPort(AddressFamily.InterNetwork);
+        public static int Value { get; } = GetAvailableTcpPort(AddressFamily.InterNetwork);
+
+        /// <summary>
+        /// 获取可用的随机Tcp端口
+        /// </summary>
+        /// <param name="addressFamily"></param>
+        /// <returns></returns>
+        private static int GetAvailableTcpPort(AddressFamily addressFamily)
+        {
+            return OperatingSystem.IsWindows()
+                ? GetAvailableTcpPort(addressFamily, 443)
+                : GetAvailableTcpPort(addressFamily, 12345);
+        }
 
         /// <summary>
         /// 获取可用的随机Tcp端口
@@ -23,7 +34,7 @@ namespace FastGithub.HttpServer
         /// <param name="addressFamily"></param>
         /// <param name="min">最小值</param>
         /// <returns></returns>
-        private static int GetAvailableTcpPort(AddressFamily addressFamily, int min = 12345)
+        private static int GetAvailableTcpPort(AddressFamily addressFamily, int min)
         {
             var hashSet = new HashSet<int>();
             var tcpListeners = IPGlobalProperties.GetIPGlobalProperties().GetActiveTcpListeners();

FastGithub.HttpServer/KestrelServerOptionsExtensions.cs

@@ -86,11 +86,6 @@ namespace FastGithub
         public static int ListenHttpsReverseProxy(this KestrelServerOptions kestrel)
         {
             var httpsPort = HttpsReverseProxyPort.Value;
-            if (OperatingSystem.IsWindows())
-            {
-                TcpTable.KillPortOwner(httpsPort);
-            }
-
             if (CanListenTcp(httpsPort) == false)
             {
                 throw new FastGithubException($"tcp端口{httpsPort}已经被其它进程占用");
@@ -105,7 +100,7 @@ namespace FastGithub
                     https.ServerCertificateSelector = (ctx, domain) =>
                         certService.GetOrCreateServerCert(domain)));
 
-            if (httpsPort == 443)
+            if (OperatingSystem.IsWindows())
             {
                 var logger = kestrel.GetLogger();
                 logger.LogInformation($"已监听https://{IPAddress.Loopback}:{httpsPort}，https反向代理服务启动完成");

FastGithub.HttpServer/TcpTable.cs

@@ -1,139 +0,0 @@
-using System;
-using System.Buffers.Binary;
-using System.Diagnostics;
-using System.Net;
-using System.Net.Sockets;
-using System.Runtime.InteropServices;
-using System.Runtime.Versioning;
-
-namespace FastGithub.HttpServer
-{
-    /// <summary>
-    /// windows iphlpapi
-    /// </summary>
-    [SupportedOSPlatform("windows")]
-    unsafe static class TcpTable
-    {
-        private const int ERROR_INSUFFICIENT_BUFFER = 122;
-
-        [DllImport("iphlpapi.dll", SetLastError = true)]
-        private static extern uint GetExtendedTcpTable(void* pTcpTable, ref int pdwSize, bool bOrder, AddressFamily ulAf, TCP_TABLE_CLASS tableClass, uint reserved = 0);
-
-
-        /// <summary>
-        /// 杀死占用进程
-        /// </summary>
-        /// <param name="port"></param>
-        /// <returns></returns>
-        public static bool KillPortOwner(int port)
-        {
-            if (TryGetOwnerProcessId(port, out var pid) == false)
-            {
-                return true;
-            }
-
-            try
-            {
-                var proess = Process.GetProcessById(pid);
-                proess.Kill();
-                return proess.WaitForExit(1000);
-            }
-            catch (ArgumentException)
-            {
-                return true;
-            }
-            catch (Exception)
-            {
-                return false;
-            }
-        }
-
-        /// <summary>
-        /// 获取tcp端口的占用进程id
-        /// </summary>
-        /// <param name="port"></param>
-        /// <param name="processId"></param>
-        /// <returns></returns>
-        public static bool TryGetOwnerProcessId(int port, out int processId)
-        {
-            processId = 0;
-            var pdwSize = 0;
-            var result = GetExtendedTcpTable(null, ref pdwSize, false, AddressFamily.InterNetwork, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_LISTENER);
-            if (result != ERROR_INSUFFICIENT_BUFFER)
-            {
-                return false;
-            }
-
-            var buffer = new byte[pdwSize];
-            fixed (byte* pTcpTable = &buffer[0])
-            {
-                result = GetExtendedTcpTable(pTcpTable, ref pdwSize, false, AddressFamily.InterNetwork, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_LISTENER);
-                if (result != 0)
-                {
-                    return false;
-                }
-
-                var prt = new IntPtr(pTcpTable);
-                var table = Marshal.PtrToStructure<MIB_TCPTABLE_OWNER_PID>(prt);
-                prt += sizeof(int);
-                for (var i = 0; i < table.dwNumEntries; i++)
-                {
-                    var row = Marshal.PtrToStructure<MIB_TCPROW_OWNER_PID>(prt);
-                    if (row.LocalPort == port)
-                    {
-                        processId = row.ProcessId;
-                        return true;
-                    }
-
-                    prt += Marshal.SizeOf<MIB_TCPROW_OWNER_PID>();
-                }
-            }
-
-            return false;
-        }
-
-
-        private enum TCP_TABLE_CLASS
-        {
-            TCP_TABLE_BASIC_LISTENER,
-            TCP_TABLE_BASIC_CONNECTIONS,
-            TCP_TABLE_BASIC_ALL,
-            TCP_TABLE_OWNER_PID_LISTENER,
-            TCP_TABLE_OWNER_PID_CONNECTIONS,
-            TCP_TABLE_OWNER_PID_ALL,
-            TCP_TABLE_OWNER_MODULE_LISTENER,
-            TCP_TABLE_OWNER_MODULE_CONNECTIONS,
-            TCP_TABLE_OWNER_MODULE_ALL
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        private struct MIB_TCPTABLE_OWNER_PID
-        {
-            public uint dwNumEntries;
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        private struct MIB_TCPROW_OWNER_PID
-        {
-            public uint state;
-
-            public uint localAddr;
-
-            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
-            public byte[] localPort;
-
-            public uint remoteAddr;
-
-            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
-            public byte[] remotePort;
-
-            public int owningPid;
-
-            public int ProcessId => owningPid;
-
-            public IPAddress LocalAddress => new(localAddr);
-
-            public ushort LocalPort => BinaryPrimitives.ReadUInt16BigEndian(this.localPort);
-        }
-    }
-}

FastGithub.PacketIntercept/DnsInterceptor.cs

@@ -154,6 +154,7 @@ namespace FastGithub.Dns
             packet.UdpHeader->Length = BinaryPrimitives.ReverseEndianness((ushort)(sizeof(UdpHeader) + responsePayload.Length));
 
             // 反转方向
+            winDivertAddress.Impostor = true;
             if (winDivertAddress.Direction == WinDivertDirection.Inbound)
             {
                 winDivertAddress.Direction = WinDivertDirection.Outbound;

FastGithub.PacketIntercept/FastGithub.PacketIntercept.csproj

@@ -9,6 +9,7 @@
 		<PackageReference Include="DNS" Version="6.1.0" />
 		<PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
 		<PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
+		<PackageReference Include="PacketDotNet" Version="1.3.0" />
 		<PackageReference Include="WinDivertSharp" Version="1.4.3.3" />
 	</ItemGroup>
 

FastGithub.PacketIntercept/HttpsInterceptHostedService.cs

@@ -0,0 +1,37 @@
+using FastGithub.Configuration;
+using Microsoft.Extensions.Hosting;
+using System.Runtime.Versioning;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FastGithub.Dns
+{
+    /// <summary>
+    /// https拦截后台服务
+    /// </summary>
+    [SupportedOSPlatform("windows")]
+    sealed class HttpsInterceptHostedService : BackgroundService
+    {
+        private readonly HttpsInterceptor httpsInterceptor;
+
+        /// <summary>
+        /// https拦截后台服务
+        /// </summary> 
+        /// <param name="httpsInterceptor"></param> 
+        public HttpsInterceptHostedService(HttpsInterceptor httpsInterceptor)
+        {
+            this.httpsInterceptor = httpsInterceptor;
+        }
+
+        /// <summary>
+        /// https后台
+        /// </summary>
+        /// <param name="stoppingToken"></param>
+        /// <returns></returns>
+        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            await Task.Yield();
+            this.httpsInterceptor.Intercept(stoppingToken);
+        }
+    }
+}

FastGithub.PacketIntercept/HttpsInterceptor.cs

@@ -0,0 +1,95 @@
+using FastGithub.Configuration;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Buffers.Binary;
+using System.Runtime.Versioning;
+using System.Threading;
+using WinDivertSharp;
+
+namespace FastGithub.Dns
+{
+    /// <summary>
+    /// https拦截器
+    /// </summary>   
+    [SupportedOSPlatform("windows")]
+    sealed class HttpsInterceptor
+    {
+        private readonly ILogger<DnsInterceptor> logger;
+        private readonly ushort https443Port = BinaryPrimitives.ReverseEndianness((ushort)443);
+        private readonly ushort httpReverseProxyPort = BinaryPrimitives.ReverseEndianness((ushort)HttpsReverseProxyPort.Value);
+
+        /// <summary>
+        /// https拦截器
+        /// </summary>
+        /// <param name="logger"></param>
+        public HttpsInterceptor(ILogger<DnsInterceptor> logger)
+        {
+            this.logger = logger;
+        }
+
+        /// <summary>
+        /// 拦截443端口的数据包
+        /// </summary>
+        /// <param name="cancellationToken"></param>
+        public void Intercept(CancellationToken cancellationToken)
+        {
+            if (HttpsReverseProxyPort.Value == 443)
+            {
+                return;
+            }
+
+            var filter = $"loopback and (tcp.DstPort == 443 or tcp.SrcPort == {HttpsReverseProxyPort.Value})";
+            var handle = WinDivert.WinDivertOpen(filter, WinDivertLayer.Network, 0, WinDivertOpenFlags.None);
+            if (handle == IntPtr.Zero)
+            {
+                return;
+            }
+
+            cancellationToken.Register(hwnd => WinDivert.WinDivertClose((IntPtr)hwnd!), handle);
+
+            var packetLength = 0U;
+            using var winDivertBuffer = new WinDivertBuffer();
+            var winDivertAddress = new WinDivertAddress();
+
+            while (cancellationToken.IsCancellationRequested == false)
+            {
+                if (WinDivert.WinDivertRecv(handle, winDivertBuffer, ref winDivertAddress, ref packetLength))
+                {
+                    try
+                    {
+                        this.ModifyHttpsPacket(winDivertBuffer, ref winDivertAddress, ref packetLength);
+                    }
+                    catch (Exception ex)
+                    {
+                        this.logger.LogWarning(ex.Message);
+                    }
+                    finally
+                    {
+                        WinDivert.WinDivertSend(handle, winDivertBuffer, packetLength, ref winDivertAddress);
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// 443端口转发到https反向代理端口
+        /// </summary>
+        /// <param name="winDivertBuffer"></param>
+        /// <param name="winDivertAddress"></param>
+        /// <param name="packetLength"></param> 
+        unsafe private void ModifyHttpsPacket(WinDivertBuffer winDivertBuffer, ref WinDivertAddress winDivertAddress, ref uint packetLength)
+        {
+            var packet = WinDivert.WinDivertHelperParsePacket(winDivertBuffer, packetLength);
+            if (packet.TcpHeader->DstPort == https443Port)
+            {
+                packet.TcpHeader->DstPort = this.httpReverseProxyPort;
+            }
+            else
+            {
+                packet.TcpHeader->SrcPort = https443Port;
+            }
+            winDivertAddress.Impostor = true;
+            WinDivert.WinDivertHelperCalcChecksums(winDivertBuffer, packetLength, ref winDivertAddress, WinDivertChecksumHelperParam.All);
+        }
+    }
+}

FastGithub.PacketIntercept/ServiceCollectionExtensions.cs

@@ -11,17 +11,19 @@ namespace FastGithub
     public static class ServiceCollectionExtensions
     {
         /// <summary>
-        /// 注册dns拦截器
+        /// 注册数据包拦截器
         /// </summary>
         /// <param name="services"></param> 
         /// <returns></returns>
         [SupportedOSPlatform("windows")]
-        public static IServiceCollection AddDnsInterceptor(this IServiceCollection services)
+        public static IServiceCollection AddPacketIntercept(this IServiceCollection services)
         {
             services.TryAddSingleton<DnsInterceptor>();
+            services.TryAddSingleton<HttpsInterceptor>();
             services.AddSingleton<IConflictSolver, HostsConflictSolver>();
             services.AddSingleton<IConflictSolver, ProxyConflictSolver>();
-            return services.AddHostedService<DnsInterceptHostedService>();
+            services.AddHostedService<DnsInterceptHostedService>();
+            return services.AddHostedService<HttpsInterceptHostedService>();
         }
     }
 }

FastGithub.sln

@@ -1,12 +1,10 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
+# Visual Studio Version 17
-VisualStudioVersion = 16.0.31320.298
+VisualStudioVersion = 17.0.31612.314
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub", "FastGithub\FastGithub.csproj", "{C1099390-6103-4917-A740-A3002B542FE0}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.Dns", "FastGithub.Dns\FastGithub.Dns.csproj", "{43FF9C79-51D5-4037-AA0B-CA3006E2A7E6}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.Http", "FastGithub.Http\FastGithub.Http.csproj", "{B5DCB3E4-5094-4170-B844-6F395002CA42}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.DomainResolve", "FastGithub.DomainResolve\FastGithub.DomainResolve.csproj", "{5D26ABDD-F341-4EB7-9D08-FCB80F79B4B4}"
@@ -15,6 +13,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.Configuration",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.HttpServer", "FastGithub.HttpServer\FastGithub.HttpServer.csproj", "{C9807DA0-4620-445E-ABBF-57A617B8E773}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FastGithub.PacketIntercept", "FastGithub.PacketIntercept\FastGithub.PacketIntercept.csproj", "{701FF90C-E651-4E0B-AE7F-84D1F17DD178}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -25,10 +25,6 @@ Global
 		{C1099390-6103-4917-A740-A3002B542FE0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C1099390-6103-4917-A740-A3002B542FE0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C1099390-6103-4917-A740-A3002B542FE0}.Release|Any CPU.Build.0 = Release|Any CPU
-		{43FF9C79-51D5-4037-AA0B-CA3006E2A7E6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{43FF9C79-51D5-4037-AA0B-CA3006E2A7E6}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{43FF9C79-51D5-4037-AA0B-CA3006E2A7E6}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{43FF9C79-51D5-4037-AA0B-CA3006E2A7E6}.Release|Any CPU.Build.0 = Release|Any CPU
 		{B5DCB3E4-5094-4170-B844-6F395002CA42}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{B5DCB3E4-5094-4170-B844-6F395002CA42}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B5DCB3E4-5094-4170-B844-6F395002CA42}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -45,6 +41,10 @@ Global
 		{C9807DA0-4620-445E-ABBF-57A617B8E773}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C9807DA0-4620-445E-ABBF-57A617B8E773}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C9807DA0-4620-445E-ABBF-57A617B8E773}.Release|Any CPU.Build.0 = Release|Any CPU
+		{701FF90C-E651-4E0B-AE7F-84D1F17DD178}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{701FF90C-E651-4E0B-AE7F-84D1F17DD178}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{701FF90C-E651-4E0B-AE7F-84D1F17DD178}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{701FF90C-E651-4E0B-AE7F-84D1F17DD178}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

FastGithub/FastGithub.csproj

@@ -12,9 +12,9 @@
   <ItemGroup>
     <PackageReference Include="PInvoke.AdvApi32" Version="0.7.104" />
     <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="5.0.1" />
-    <ProjectReference Include="..\FastGithub.Dns\FastGithub.Dns.csproj" />
     <ProjectReference Include="..\FastGithub.DomainResolve\FastGithub.DomainResolve.csproj" />
     <ProjectReference Include="..\FastGithub.HttpServer\FastGithub.HttpServer.csproj" />
+    <ProjectReference Include="..\FastGithub.PacketIntercept\FastGithub.PacketIntercept.csproj" />
   </ItemGroup>
 
   <ItemGroup>

FastGithub/Startup.cs

@@ -40,7 +40,7 @@ namespace FastGithub
 
             if (OperatingSystem.IsWindows())
             {
-                services.AddDnsInterceptor();
+                services.AddPacketIntercept();
             }
         }