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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
*/
#include "adapter.h"
#include "entry.h"
#include "logger.h"
#include "registry.h"
#include "namespace.h"
#include "nci.h"
#include "wintun.h"
#include <Windows.h>
#pragma warning(push)
#pragma warning(disable : 4201)
/* nonstandard extension used: nameless struct/union */
#include <delayimp.h>
#pragma warning(pop)
#include <sddl.h>
HINSTANCE ResourceModule;
HANDLE ModuleHeap;
SECURITY_ATTRIBUTES SecurityAttributes = { .nLength = sizeof(SECURITY_ATTRIBUTES) };
WINTUN_STATUS WINAPI
WintunGetVersion(
_Out_ DWORD *DriverVersionMaj,
_Out_ DWORD *DriverVersionMin,
_Out_ DWORD *NdisVersionMaj,
_Out_ DWORD *NdisVersionMin)
{
HKEY Key;
DWORD Result =
RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SYSTEM\\CurrentControlSet\\Services\\Wintun", 0, KEY_QUERY_VALUE, &Key);
if (Result != ERROR_SUCCESS)
return LOG_ERROR(L"Failed to open registry key", Result);
if (RegistryQueryDWORD(Key, L"DriverMajorVersion", DriverVersionMaj, FALSE) != ERROR_SUCCESS ||
RegistryQueryDWORD(Key, L"DriverMinorVersion", DriverVersionMin, FALSE) != ERROR_SUCCESS)
{
/* TODO: Drop the fallback to WINTUN_VERSION_MAJ & WINTUN_VERSION_MIN when Windows 7 support is discontinued. */
*DriverVersionMaj = WINTUN_VERSION_MAJ;
*DriverVersionMin = WINTUN_VERSION_MIN;
}
Result = RegistryQueryDWORD(Key, L"NdisMajorVersion", NdisVersionMaj, TRUE);
if (Result != ERROR_SUCCESS)
{
LOG(WINTUN_LOG_ERR, L"Failed to query NdisMajorVersion value");
goto cleanupKey;
}
Result = RegistryQueryDWORD(Key, L"NdisMinorVersion", NdisVersionMin, TRUE);
if (Result != ERROR_SUCCESS)
LOG(WINTUN_LOG_ERR, L"Failed to query NdisMinorVersion value");
cleanupKey:
RegCloseKey(Key);
return Result;
}
static FARPROC WINAPI DelayedLoadLibraryHook(unsigned dliNotify, PDelayLoadInfo pdli)
{
if (dliNotify != dliNotePreLoadLibrary)
return NULL;
HMODULE Library = LoadLibraryExA(pdli->szDll, NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
if (!Library)
abort();
return (FARPROC)Library;
}
const PfnDliHook __pfnDliNotifyHook2 = DelayedLoadLibraryHook;
BOOL APIENTRY
DllMain(_In_ HINSTANCE hinstDLL, _In_ DWORD fdwReason, _In_ LPVOID lpvReserved)
{
UNREFERENCED_PARAMETER(lpvReserved);
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
ResourceModule = hinstDLL;
ModuleHeap = HeapCreate(0, 0, 0);
if (!ModuleHeap)
return FALSE;
ConvertStringSecurityDescriptorToSecurityDescriptorW(
L"O:SYD:P(A;;GA;;;SY)", SDDL_REVISION_1, &SecurityAttributes.lpSecurityDescriptor, NULL);
AdapterInit();
NamespaceInit();
if (NciInit() != ERROR_SUCCESS)
return FALSE;
break;
case DLL_PROCESS_DETACH:
NciCleanup();
NamespaceCleanup();
LocalFree(SecurityAttributes.lpSecurityDescriptor);
HeapDestroy(ModuleHeap);
break;
}
return TRUE;
}
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