test: introduce a demo client

Signed-off-by: Simon Rozman <simon@rozman.si>

5 files changed, 470 insertions, 0 deletions

diff --git a/api/api.vcxproj b/api/api.vcxproj
index af28a41..da3e78a 100644
--- a/api/api.vcxproj
+++ b/api/api.vcxproj
@@ -99,6 +99,7 @@
     <TargetName>wintun</TargetName>
     <CodeAnalysisRuleSet>NativeRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <RunCodeAnalysis>true</RunCodeAnalysis>
+    <IgnoreImportLibrary>true</IgnoreImportLibrary>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
     <LocalDebuggerCommand>rundll32.exe</LocalDebuggerCommand>
diff --git a/test/test.c b/test/test.c
new file mode 100644
index 0000000..6e6ea5e
--- /dev/null
+++ b/test/test.c
@@ -0,0 +1,260 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
+ */
+
+#include "../api/wintun.h"
+#include <stdarg.h>
+#include <stdio.h>
+
+static WINTUN_GET_VERSION_FUNC WintunGetVersion;
+static WINTUN_SET_LOGGER_FUNC WintunSetLogger;
+static WINTUN_CREATE_ADAPTER_FUNC WintunCreateAdapter;
+static WINTUN_DELETE_ADAPTER_FUNC WintunDeleteAdapter;
+static WINTUN_START_SESSION_FUNC WintunStartSession;
+static WINTUN_END_SESSION_FUNC WintunEndSession;
+static WINTUN_RECEIVE_PACKETS_FUNC WintunReceivePacket;
+static WINTUN_RECEIVE_RELEASE_FUNC WintunReceiveRelease;
+static WINTUN_ALLOCATE_SEND_PACKET_FUNC WintunAllocateSendPacket;
+static WINTUN_SEND_PACKET_FUNC WintunSendPacket;
+
+static HANDLE Quit;
+static WCHAR Pool[WINTUN_MAX_POOL];
+
+static BOOL CALLBACK
+ConsoleLogger(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *LogLine)
+{
+    FILETIME Timestamp;
+    GetSystemTimePreciseAsFileTime(&Timestamp);
+    SYSTEMTIME SystemTime;
+    FileTimeToSystemTime(&Timestamp, &SystemTime);
+    WCHAR LevelMarker;
+    switch (Level)
+    {
+    case WINTUN_LOG_INFO:
+        LevelMarker = L'+';
+        break;
+    case WINTUN_LOG_WARN:
+        LevelMarker = L'-';
+        break;
+    case WINTUN_LOG_ERR:
+        LevelMarker = L'!';
+        break;
+    default:
+        return FALSE;
+    }
+    fwprintf(
+        stderr,
+        L"%04d-%02d-%02d %02d:%02d:%02d.%04d [%c] %s\n",
+        SystemTime.wYear,
+        SystemTime.wMonth,
+        SystemTime.wDay,
+        SystemTime.wHour,
+        SystemTime.wMinute,
+        SystemTime.wSecond,
+        SystemTime.wMilliseconds,
+        LevelMarker,
+        LogLine);
+    return TRUE;
+}
+
+static DWORD
+LogLastError(_In_z_ const WCHAR *Prefix)
+{
+    DWORD Error = GetLastError();
+    WCHAR *SystemMessage = NULL, *FormattedMessage = NULL;
+    FormatMessageW(
+        FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_MAX_WIDTH_MASK,
+        NULL,
+        HRESULT_FROM_SETUPAPI(Error),
+        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        (void *)&SystemMessage,
+        0,
+        NULL);
+    FormatMessageW(
+        FORMAT_MESSAGE_FROM_STRING | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_ARGUMENT_ARRAY |
+            FORMAT_MESSAGE_MAX_WIDTH_MASK,
+        SystemMessage ? L"%1: %3(Code 0x%2!08X!)" : L"%1: Code 0x%2!08X!",
+        0,
+        0,
+        (void *)&FormattedMessage,
+        0,
+        (va_list *)(DWORD_PTR[]){ (DWORD_PTR)Prefix, (DWORD_PTR)Error, (DWORD_PTR)SystemMessage });
+    if (FormattedMessage)
+        ConsoleLogger(WINTUN_LOG_ERR, FormattedMessage);
+    LocalFree(FormattedMessage);
+    LocalFree(SystemMessage);
+    SetLastError(Error);
+    return Error;
+}
+
+static void
+Log(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *Format, ...)
+{
+    WCHAR LogLine[0x200];
+    va_list args;
+    va_start(args, Format);
+    _vsnwprintf_s(LogLine, _countof(LogLine), _TRUNCATE, Format, args);
+    va_end(args);
+    ConsoleLogger(Level, LogLine);
+}
+
+static BOOL WINAPI
+CtrlHandler(DWORD CtrlType)
+{
+    switch (CtrlType)
+    {
+    case CTRL_C_EVENT:
+    case CTRL_BREAK_EVENT:
+    case CTRL_CLOSE_EVENT:
+    case CTRL_LOGOFF_EVENT:
+    case CTRL_SHUTDOWN_EVENT:
+        SetEvent(Quit);
+        return TRUE;
+    }
+    return FALSE;
+}
+
+static DWORD WINAPI
+TestAdapter(_Inout_ DWORD_PTR Index)
+{
+    /* Create adapter. */
+    WCHAR AdapterName[MAX_ADAPTER_NAME];
+    _snwprintf_s(
+        AdapterName,
+        _countof(AdapterName),
+        _TRUNCATE,
+        L"test-%d.%d-%zu",
+        WINTUN_VERSION_MAJ,
+        WINTUN_VERSION_MIN,
+        Index);
+    const GUID AdapterGuid = { 0xeef7ebf,
+                               WINTUN_VERSION_MAJ,
+                               WINTUN_VERSION_MIN,
+                               { (BYTE)Index & 0xff, 0xa, 0x33, 0xbf, 0x5c, 0x8, 0x4a, 0xc6 } };
+    while (WaitForSingleObject(Quit, 0) == WAIT_TIMEOUT)
+    {
+        WINTUN_ADAPTER_HANDLE Adapter;
+        BOOL RebootRequired = FALSE;
+        DWORD Result = WintunCreateAdapter(Pool, AdapterName, &AdapterGuid, &Adapter, &RebootRequired);
+        if (Result != ERROR_SUCCESS)
+        {
+            Log(WINTUN_LOG_ERR, L"%s adapter creation failed.\n", AdapterName);
+            return Result;
+        }
+
+        /* Report version. */
+        DWORD DriverVersionMaj, DriverVersionMin, NdisVersionMaj, NdisVersionMin;
+        WintunGetVersion(&DriverVersionMaj, &DriverVersionMin, &NdisVersionMaj, &NdisVersionMin);
+        Log(WINTUN_LOG_INFO,
+            L"%s adapter created (Wintun %d.%d, NDIS %d.%d, reboot: %d).\n",
+            AdapterName,
+            WINTUN_VERSION_MAJ,
+            WINTUN_VERSION_MIN,
+            NdisVersionMaj,
+            NdisVersionMin,
+            RebootRequired ? 1 : 0);
+
+        WINTUN_SESSION_HANDLE Session;
+        HANDLE WaitHandles[2] = { NULL, Quit };
+        Result = WintunStartSession(Adapter, 0x100000, &Session, &WaitHandles[0]);
+        if (Result != ERROR_SUCCESS)
+        {
+            Log(WINTUN_LOG_ERR, L"%s session creation failed.\n", AdapterName);
+            goto cleanupAdapter;
+        }
+        for (;;)
+        {
+            BYTE *Packet;
+            DWORD PacketSize;
+            Result = WintunReceivePacket(Session, &Packet, &PacketSize);
+            switch (Result)
+            {
+            case ERROR_SUCCESS:
+                // TODO: Process packet.
+                WintunReceiveRelease(Session, Packet);
+                continue;
+            case ERROR_NO_MORE_ITEMS:
+                if (WaitForMultipleObjects(_countof(WaitHandles), WaitHandles, FALSE, INFINITE) == WAIT_OBJECT_0)
+                    continue;
+                goto cleanupSession;
+            }
+            Log(WINTUN_LOG_ERR, L"%s packet read failed (Code 0x%08X).\n", AdapterName, Result);
+            goto cleanupSession;
+        }
+    cleanupSession:
+        WintunEndSession(Session);
+    cleanupAdapter:
+        WintunDeleteAdapter(Adapter, TRUE, &RebootRequired);
+    }
+    return ERROR_SUCCESS;
+}
+
+int
+main()
+{
+    Log(WINTUN_LOG_INFO, L"Wintun Test v%d.%d\n", WINTUN_VERSION_MAJ, WINTUN_VERSION_MIN);
+
+    HMODULE Wintun =
+        LoadLibraryExW(L"wintun.dll", NULL, LOAD_LIBRARY_SEARCH_APPLICATION_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32);
+    if (!Wintun)
+        return LogLastError(L"Failed to load wintun.dll");
+    DWORD Result;
+    if ((WintunGetVersion = (WINTUN_GET_VERSION_FUNC)GetProcAddress(Wintun, "WintunGetVersion")) == NULL ||
+        (WintunSetLogger = (WINTUN_SET_LOGGER_FUNC)GetProcAddress(Wintun, "WintunSetLogger")) == NULL ||
+        (WintunCreateAdapter = (WINTUN_CREATE_ADAPTER_FUNC)GetProcAddress(Wintun, "WintunCreateAdapter")) == NULL ||
+        (WintunDeleteAdapter = (WINTUN_DELETE_ADAPTER_FUNC)GetProcAddress(Wintun, "WintunDeleteAdapter")) == NULL ||
+        (WintunStartSession = (WINTUN_START_SESSION_FUNC)GetProcAddress(Wintun, "WintunStartSession")) == NULL ||
+        (WintunEndSession = (WINTUN_END_SESSION_FUNC)GetProcAddress(Wintun, "WintunEndSession")) == NULL ||
+        (WintunReceivePacket = (WINTUN_RECEIVE_PACKETS_FUNC)GetProcAddress(Wintun, "WintunReceivePacket")) == NULL ||
+        (WintunReceiveRelease = (WINTUN_RECEIVE_RELEASE_FUNC)GetProcAddress(Wintun, "WintunReceiveRelease")) == NULL ||
+        (WintunAllocateSendPacket =
+             (WINTUN_ALLOCATE_SEND_PACKET_FUNC)GetProcAddress(Wintun, "WintunAllocateSendPacket")) == NULL ||
+        (WintunSendPacket = (WINTUN_SEND_PACKET_FUNC)GetProcAddress(Wintun, "WintunSendPacket")) == NULL)
+    {
+        Result = LogLastError(L"Failed to get wintun.dll entries");
+        goto cleanupWintun;
+    }
+
+    Quit = CreateEventW(NULL, TRUE, FALSE, NULL);
+    if (!Quit)
+    {
+        Result = LogLastError(L"Failed to create event");
+        goto cleanupWintun;
+    }
+    WintunSetLogger(ConsoleLogger);
+    if (!SetConsoleCtrlHandler(CtrlHandler, TRUE))
+    {
+        Result = LogLastError(L"Failed to set console handler");
+        goto cleanupQuit;
+    }
+    _snwprintf_s(Pool, _countof(Pool), _TRUNCATE, L"net.wintun-%d.%d", WINTUN_VERSION_MAJ, WINTUN_VERSION_MIN);
+
+    HANDLE Workers[MAXIMUM_WAIT_OBJECTS] = { 0 };
+    for (size_t i = 0; i < _countof(Workers); ++i)
+        if (!Workers[i])
+        {
+            Workers[i] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)TestAdapter, (LPVOID)i, 0, NULL);
+            if (!Workers[i])
+            {
+                Result = LogLastError(L"Failed to create thread");
+                goto cleanupWorkers;
+            }
+        }
+    WaitForMultipleObjectsEx(_countof(Workers), Workers, TRUE, INFINITE, TRUE);
+    Result = ERROR_SUCCESS;
+cleanupWorkers:
+    SetEvent(Quit);
+    for (size_t i = 0; i < _countof(Workers); ++i)
+        if (Workers[i])
+        {
+            WaitForSingleObject(Workers[i], INFINITE);
+            CloseHandle(Workers[i]);
+        }
+    SetConsoleCtrlHandler(CtrlHandler, FALSE);
+cleanupQuit:
+    CloseHandle(Quit);
+cleanupWintun:
+    FreeLibrary(Wintun);
+    return Result;
+}
diff --git a/test/test.vcxproj b/test/test.vcxproj
new file mode 100644
index 0000000..e58bc87
--- /dev/null
+++ b/test/test.vcxproj
@@ -0,0 +1,177 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM">
+      <Configuration>Release</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="test.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\api\api.vcxproj">
+      <Project>{897f02e3-3eaa-40af-a6dc-17eb2376edaf}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{2abac503-245d-4f53-85c5-0f844def738b}</ProjectGuid>
+    <RootNamespace>test</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\wintun.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <OutDir>..\$(Configuration)\$(WintunPlatform)\</OutDir>
+    <IntDir>..\$(Configuration)\$(WintunPlatform)\$(ProjectName)-intermediate\</IntDir>
+    <CodeAnalysisRuleSet>NativeRecommendedRules.ruleset</CodeAnalysisRuleSet>
+    <RunCodeAnalysis>true</RunCodeAnalysis>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
+    <ClCompile>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
+    <ClCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+    </Link>
+  </ItemDefinitionGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/test/test.vcxproj.filters b/test/test.vcxproj.filters
new file mode 100644
index 0000000..b346ab6
--- /dev/null
+++ b/test/test.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="test.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/wintun.sln b/wintun.sln
index 93d565b..48c2c1a 100644
--- a/wintun.sln
+++ b/wintun.sln
@@ -17,6 +17,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		wintun.props = wintun.props
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "test", "test\test.vcxproj", "{2ABAC503-245D-4F53-85C5-0F844DEF738B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|amd64 = Debug|amd64
@@ -61,6 +63,14 @@ Global
 		{F7679B65-2FEC-469A-8BAC-B07BF4439422}.Release|arm64.Build.0 = Release|ARM64
 		{F7679B65-2FEC-469A-8BAC-B07BF4439422}.Release|x86.ActiveCfg = Release|Win32
 		{F7679B65-2FEC-469A-8BAC-B07BF4439422}.Release|x86.Build.0 = Release|Win32
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Debug|amd64.ActiveCfg = Debug|x64
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Debug|arm.ActiveCfg = Debug|ARM
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Debug|arm64.ActiveCfg = Debug|ARM64
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Debug|x86.ActiveCfg = Debug|Win32
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Release|amd64.ActiveCfg = Release|x64
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Release|arm.ActiveCfg = Release|ARM
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Release|arm64.ActiveCfg = Release|ARM64
+		{2ABAC503-245D-4F53-85C5-0F844DEF738B}.Release|x86.ActiveCfg = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE