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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
*/
#include "adapter.h"
#include "logger.h"
#include "session.h"
#include "wintun.h"
#include <Windows.h>
#include <cfgmgr32.h>
#include <objbase.h>
#include <assert.h>
#define EXPORT comment(linker, "/EXPORT:" __FUNCTION__ "=" __FUNCDNAME__)
#if defined(ACCEPT_WOW64) || defined(_DEBUG)
static
#ifndef _DEBUG
const
#endif
BOOL WriteToConsole = FALSE;
static DWORD
WriteFormatted(_In_ DWORD StdHandle, _In_z_ const WCHAR *Template, ...)
{
WCHAR *FormattedMessage = NULL;
DWORD SizeWritten;
va_list Arguments;
va_start(Arguments, Template);
DWORD Len = FormatMessageW(
FORMAT_MESSAGE_FROM_STRING | FORMAT_MESSAGE_ALLOCATE_BUFFER,
Template,
0,
0,
(void *)&FormattedMessage,
0,
&Arguments);
if (WriteToConsole)
WriteConsoleW(GetStdHandle(StdHandle), FormattedMessage, Len, &SizeWritten, NULL);
else
WriteFile(GetStdHandle(StdHandle), FormattedMessage, Len * sizeof(WCHAR), &SizeWritten, NULL);
LocalFree(FormattedMessage);
va_end(Arguments);
return SizeWritten / sizeof(WCHAR);
}
static BOOL CALLBACK
ConsoleLogger(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *LogLine)
{
const WCHAR *Template;
switch (Level)
{
case WINTUN_LOG_INFO:
Template = L"[+] %1\n";
break;
case WINTUN_LOG_WARN:
Template = L"[-] %1\n";
break;
case WINTUN_LOG_ERR:
Template = L"[!] %1\n";
break;
default:
return FALSE;
}
WriteFormatted(STD_ERROR_HANDLE, Template, LogLine);
return TRUE;
}
static int Argc;
static WCHAR **Argv;
static void
Init(void)
{
WintunSetLogger(ConsoleLogger);
Argv = CommandLineToArgvW(GetCommandLineW(), &Argc);
}
static void
Done(void)
{
LocalFree(Argv);
}
VOID __stdcall CreateAdapter(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow)
{
# pragma EXPORT
UNREFERENCED_PARAMETER(hwnd);
UNREFERENCED_PARAMETER(hinst);
UNREFERENCED_PARAMETER(lpszCmdLine);
UNREFERENCED_PARAMETER(nCmdShow);
Init();
if (Argc < 4)
goto cleanup;
if (wcslen(Argv[2]) >= WINTUN_MAX_POOL)
goto cleanup;
if (wcslen(Argv[3]) >= MAX_ADAPTER_NAME)
goto cleanup;
GUID RequestedGUID;
if (Argc > 4 && FAILED(CLSIDFromString(Argv[4], &RequestedGUID)))
goto cleanup;
WINTUN_ADAPTER *Adapter;
BOOL RebootRequired;
DWORD Result = WintunCreateAdapter(Argv[2], Argv[3], Argc > 4 ? &RequestedGUID : NULL, &Adapter, &RebootRequired);
WCHAR GuidStr[MAX_GUID_STRING_LEN];
WriteFormatted(
STD_OUTPUT_HANDLE,
L"%1!X! %2!.*s! %3!X!",
Result,
StringFromGUID2(Result == ERROR_SUCCESS ? &Adapter->CfgInstanceID : &GUID_NULL, GuidStr, _countof(GuidStr)),
GuidStr,
RebootRequired);
WintunFreeAdapter(Adapter);
cleanup:
Done();
}
VOID __stdcall DeleteAdapter(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow)
{
# pragma EXPORT
UNREFERENCED_PARAMETER(hwnd);
UNREFERENCED_PARAMETER(hinst);
UNREFERENCED_PARAMETER(lpszCmdLine);
UNREFERENCED_PARAMETER(nCmdShow);
Init();
if (Argc < 3)
goto cleanup;
WINTUN_ADAPTER Adapter = { 0 };
BOOL ForceCloseSessions = wcstoul(Argv[2], NULL, 10);
if (FAILED(CLSIDFromString(Argv[3], &Adapter.CfgInstanceID)))
goto cleanup;
BOOL RebootRequired;
WINTUN_STATUS Ret = WintunDeleteAdapter(&Adapter, ForceCloseSessions, &RebootRequired);
WriteFormatted(STD_OUTPUT_HANDLE, L"%1!X! %2!X!", Ret, RebootRequired);
cleanup:
Done();
}
#ifdef _DEBUG
VOID __stdcall DoThingsForDebugging(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow)
{
# pragma EXPORT
UNREFERENCED_PARAMETER(hwnd);
UNREFERENCED_PARAMETER(hinst);
UNREFERENCED_PARAMETER(lpszCmdLine);
UNREFERENCED_PARAMETER(nCmdShow);
AllocConsole();
WriteToConsole = TRUE;
Init();
GUID TestGuid = { 0xdeadbabe, 0xcafe, 0xbeef, { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef } };
WINTUN_ADAPTER *Adapter;
BOOL RebootRequired;
assert(WintunCreateAdapter(L"Wintun", L"Test", &TestGuid, &Adapter, &RebootRequired) == ERROR_SUCCESS);
assert(!RebootRequired);
TUN_SESSION *Session;
HANDLE ReadWait;
assert(WintunStartSession(Adapter, WINTUN_MIN_RING_CAPACITY, &Session, &ReadWait) == ERROR_SUCCESS);
WintunEndSession(Session);
assert(WintunDeleteAdapter(Adapter, TRUE, &RebootRequired) == ERROR_SUCCESS);
assert(!RebootRequired);
system("pause");
}
#endif
#endif
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