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/* 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_PACKET_FUNC WintunReceivePacket;
static WINTUN_RECEIVE_RELEASE_FUNC WintunReceiveRelease;
static WINTUN_ALLOCATE_SEND_PACKET_FUNC WintunAllocateSendPacket;
static WINTUN_SEND_PACKET_FUNC WintunSendPacket;
static HANDLE QuitEvent;
static volatile BOOL HaveQuit;
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:
HaveQuit = TRUE;
SetEvent(QuitEvent);
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 (!HaveQuit)
{
WINTUN_ADAPTER_HANDLE Adapter;
BOOL RebootRequired = FALSE;
DWORD Result = WintunCreateAdapter(L"Example", AdapterName, &AdapterGuid, &Adapter, &RebootRequired);
if (Result != ERROR_SUCCESS)
{
Log(WINTUN_LOG_ERR, L"%s adapter creation failed.\n", AdapterName);
return Result;
}
DWORDLONG WintunVersion = WintunGetVersion();
Log(WINTUN_LOG_INFO,
L"%s adapter created (Wintun %d.%d.%d.%d, reboot: %d).\n",
AdapterName,
(WintunVersion >> 48) & 0xffff,
(WintunVersion >> 32) & 0xffff,
(WintunVersion >> 16) & 0xffff,
(WintunVersion >> 0) & 0xffff,
RebootRequired ? 1 : 0);
WINTUN_SESSION_HANDLE Session;
HANDLE WaitHandles[2] = { NULL, QuitEvent };
Result = WintunStartSession(Adapter, 0x100000, &Session, &WaitHandles[0]);
if (Result != ERROR_SUCCESS)
{
Log(WINTUN_LOG_ERR, L"%s session creation failed.\n", AdapterName);
goto cleanupAdapter;
}
while (!HaveQuit)
{
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(void)
{
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_PACKET_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;
}
HaveQuit = FALSE;
QuitEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
if (!QuitEvent)
{
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;
}
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:
HaveQuit = TRUE;
SetEvent(QuitEvent);
for (size_t i = 0; i < _countof(Workers); ++i)
if (Workers[i])
{
WaitForSingleObject(Workers[i], INFINITE);
CloseHandle(Workers[i]);
}
SetConsoleCtrlHandler(CtrlHandler, FALSE);
cleanupQuit:
CloseHandle(QuitEvent);
cleanupWintun:
FreeLibrary(Wintun);
return Result;
}
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