api: add pool/driver removal for uninstaller semantics
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
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0c85a2ebf1
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7dede73406
@ -1750,12 +1750,18 @@ cleanupToken:
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}
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static WINTUN_STATUS
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DeleteAllOurAdapters(void)
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DeleteAllOurAdapters(_In_ WCHAR Pool[WINTUN_MAX_POOL], _Inout_ BOOL *RebootRequired)
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{
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HANDLE Mutex = NamespaceTakePoolMutex(Pool);
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if (!Mutex)
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return ERROR_INVALID_HANDLE;
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DWORD Result = ERROR_SUCCESS;
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HDEVINFO DevInfo = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, NULL, NULL, DIGCF_PRESENT, NULL, NULL, NULL);
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if (DevInfo == INVALID_HANDLE_VALUE)
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{
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NamespaceReleaseMutex(Mutex);
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return LOG_LAST_ERROR(L"Failed to get present adapters");
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}
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SP_REMOVEDEVICE_PARAMS Params = { .ClassInstallHeader = { .cbSize = sizeof(SP_CLASSINSTALL_HEADER),
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.InstallFunction = DIF_REMOVE },
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.Scope = DI_REMOVEDEVICE_GLOBAL };
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@ -1772,39 +1778,58 @@ DeleteAllOurAdapters(void)
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BOOL IsOurs;
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if (IsOurAdapter(DevInfo, &DevInfoData, &IsOurs) != ERROR_SUCCESS || !IsOurs)
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continue;
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BOOL IsMember;
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Result = IsPoolMember(Pool, DevInfo, &DevInfoData, &IsMember);
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if (Result != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_ERR, L"Failed to get pool membership");
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break;
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}
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if (!IsMember)
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continue;
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LOG(WINTUN_LOG_INFO, L"Force closing all open handles for existing adapter");
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if (ForceCloseWintunAdapterHandle(DevInfo, &DevInfoData) != ERROR_SUCCESS)
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LOG(WINTUN_LOG_WARN, L"Failed to force close adapter handles");
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LOG(WINTUN_LOG_INFO, L"Removing existing adapter");
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if (!SetupDiSetClassInstallParamsW(DevInfo, &DevInfoData, &Params.ClassInstallHeader, sizeof(Params)) ||
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!SetupDiCallClassInstaller(DIF_REMOVE, DevInfo, &DevInfoData))
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if (SetupDiSetClassInstallParamsW(DevInfo, &DevInfoData, &Params.ClassInstallHeader, sizeof(Params)) &&
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SetupDiCallClassInstaller(DIF_REMOVE, DevInfo, &DevInfoData))
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*RebootRequired = *RebootRequired || CheckReboot(DevInfo, &DevInfoData);
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else
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{
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LOG_LAST_ERROR(L"Failed to remove existing adapter");
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Result = Result != ERROR_SUCCESS ? Result : GetLastError();
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}
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}
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SetupDiDestroyDeviceInfoList(DevInfo);
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NamespaceReleaseMutex(Mutex);
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return Result;
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}
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WINTUN_STATUS WINAPI
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WintunDeleteDriver(void)
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WintunDeletePoolDriver(_In_z_ WCHAR Pool[WINTUN_MAX_POOL], _Out_opt_ BOOL *RebootRequired)
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{
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if (!ElevateToSystem())
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return LOG_LAST_ERROR(L"Failed to impersonate SYSTEM user");
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DWORD Result = ERROR_SUCCESS;
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BOOL DummyRebootRequired;
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if (!RebootRequired)
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RebootRequired = &DummyRebootRequired;
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*RebootRequired = FALSE;
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DWORD Result;
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if (MAYBE_WOW64 && NativeMachine != IMAGE_FILE_PROCESS)
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{
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Result = DeleteDriverViaRundll32();
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Result = DeletePoolDriverViaRundll32(Pool, RebootRequired);
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RevertToSelf();
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return Result;
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}
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/* DeleteAllOurAdapters(); */
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Result = DeleteAllOurAdapters(Pool, RebootRequired);
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if (Result != ERROR_SUCCESS)
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goto cleanupToken;
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HANDLE DriverInstallationLock = NamespaceTakeDriverInstallationMutex();
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if (!DriverInstallationLock)
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{
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@ -1837,7 +1862,7 @@ WintunDeleteDriver(void)
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if (!_wcsicmp(DriverDetail->HardwareID, WINTUN_HWID))
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{
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LOG(WINTUN_LOG_INFO, TEXT("Removing existing driver"));
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if (!SetupUninstallOEMInfW(PathFindFileNameW(DriverDetail->InfFileName), SUOI_FORCEDELETE, NULL))
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if (!SetupUninstallOEMInfW(PathFindFileNameW(DriverDetail->InfFileName), 0, NULL))
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{
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LOG_LAST_ERROR(TEXT("Unable to remove existing driver"));
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Result = Result != ERROR_SUCCESS ? Result : GetLastError();
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@ -58,7 +58,7 @@ WINTUN_STATUS WINAPI
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WintunDeleteAdapter(_In_ const WINTUN_ADAPTER *Adapter, _In_ BOOL ForceCloseSessions, _Out_opt_ BOOL *RebootRequired);
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/**
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* @copydoc WINTUN_DELETE_DRIVER_FUNC
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* @copydoc WINTUN_DELETE_POOL_DRIVER_FUNC
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*/
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WINTUN_STATUS WINAPI
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WintunDeleteDriver(void);
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WintunDeletePoolDriver(_In_z_ WCHAR Pool[WINTUN_MAX_POOL], _Out_opt_ BOOL *RebootRequired);
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@ -3,7 +3,7 @@ EXPORTS
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WintunAllocateSendPacket
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WintunCreateAdapter
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WintunDeleteAdapter
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WintunDeleteDriver
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WintunDeletePoolDriver
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WintunEndSession
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WintunEnumAdapters
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WintunFreeAdapter
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@ -131,12 +131,19 @@ cleanup:
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Done();
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}
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VOID __stdcall DeleteDriver(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow)
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VOID __stdcall DeletePoolDriver(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow)
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{
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# pragma EXPORT
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Init();
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WriteFormatted(STD_OUTPUT_HANDLE, L"%1!X!", WintunDeleteDriver());
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if (Argc < 2)
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goto cleanup;
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BOOL RebootRequired;
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WINTUN_STATUS Ret = WintunDeletePoolDriver(Argv[2], &RebootRequired);
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WriteFormatted(STD_OUTPUT_HANDLE, L"%1!X! %2!X!", Ret, RebootRequired);
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cleanup:
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Done();
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}
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#endif
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@ -306,11 +306,15 @@ cleanupArgv:
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}
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static WINTUN_STATUS
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DeleteDriverViaRundll32()
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DeletePoolDriverViaRundll32(_In_z_ WCHAR Pool[WINTUN_MAX_POOL], _Inout_ BOOL *RebootRequired)
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{
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LOG(WINTUN_LOG_INFO, L"Spawning native process");
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WCHAR Response[8 + 1];
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DWORD Result = ExecuteRunDll32(L"DeleteDriver", Response, _countof(Response));
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WCHAR Arguments[17 + WINTUN_MAX_POOL + 1];
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if (_snwprintf_s(Arguments, _countof(Arguments), _TRUNCATE, L"DeletePoolDriver %s", Pool) == -1)
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return LOG(WINTUN_LOG_ERR, L"Command line too long"), ERROR_INVALID_PARAMETER;
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WCHAR Response[8 + 1 + 8 + 1];
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DWORD Result = ExecuteRunDll32(Arguments, Response, _countof(Response));
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if (Result != ERROR_SUCCESS)
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{
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LOG(WINTUN_LOG_ERR, L"Error executing worker process");
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@ -318,13 +322,15 @@ DeleteDriverViaRundll32()
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}
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int Argc;
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WCHAR **Argv = CommandLineToArgvW(Response, &Argc);
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if (Argc < 1)
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if (Argc < 2)
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{
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LOG(WINTUN_LOG_ERR, L"Incomplete or invalid response");
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Result = ERROR_INVALID_PARAMETER;
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goto cleanupArgv;
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}
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Result = wcstoul(Argv[0], NULL, 16);
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if (wcstoul(Argv[1], NULL, 16))
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*RebootRequired = TRUE;
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cleanupArgv:
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LocalFree(Argv);
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return Result;
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13
api/wintun.h
13
api/wintun.h
@ -33,7 +33,7 @@ typedef void *WINTUN_ADAPTER_HANDLE;
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* @param Name The requested name of the adapter. Zero-terminated string of up to MAX_ADAPTER_NAME-1
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* characters.
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*
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* @param RequestedGUID The GUID of the created network adapter, which then influences NLA generation
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* @param RequestedGUID The GUID of the created network adapter, which then influences NLA generation
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* deterministically. If it is set to NULL, the GUID is chosen by the system at random, and hence
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* a new NLA entry is created for each new adapter. It is called "requested" GUID because the API
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* it uses is completely undocumented, and so there could be minor interesting complications with
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@ -72,11 +72,18 @@ typedef WINTUN_STATUS(WINAPI *WINTUN_DELETE_ADAPTER_FUNC)(
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_Out_opt_ BOOL *RebootRequired);
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/**
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* Deletes all Wintun drivers from the driver store
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* Deletes all Wintun adapters in a pool and if there are no more adapters in any other pools, also removes Wintun
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* from the driver store, usually called by uninstallers.
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*
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* @param Pool Name of the adapter pool. Zero-terminated string of up to WINTUN_MAX_POOL-1 characters.
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*
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* @param RebootRequired Optional pointer to a boolean flag to be set to TRUE in case SetupAPI suggests a reboot.
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*
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* @return ERROR_SUCCESS on success; Win32 error code otherwise.
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*/
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typedef WINTUN_STATUS(WINAPI *WINTUN_DELETE_DRIVER_FUNC)(void);
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typedef WINTUN_STATUS(WINAPI *WINTUN_DELETE_POOL_DRIVER_FUNC)(
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_In_z_ WCHAR Pool[WINTUN_MAX_POOL],
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_Out_opt_ BOOL *RebootRequired);
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/**
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* Called by WintunEnumAdapters for each adapter in the pool.
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@ -14,7 +14,7 @@
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static WINTUN_CREATE_ADAPTER_FUNC WintunCreateAdapter;
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static WINTUN_DELETE_ADAPTER_FUNC WintunDeleteAdapter;
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static WINTUN_DELETE_DRIVER_FUNC WintunDeleteDriver;
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static WINTUN_DELETE_POOL_DRIVER_FUNC WintunDeletePoolDriver;
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static WINTUN_ENUM_ADAPTERS_FUNC WintunEnumAdapters;
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static WINTUN_FREE_ADAPTER_FUNC WintunFreeAdapter;
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static WINTUN_GET_ADAPTER_FUNC WintunGetAdapter;
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@ -258,8 +258,9 @@ InitializeWintun(void)
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return NULL;
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#define X(Name, Type) ((Name = (Type)GetProcAddress(Wintun, #Name)) == NULL)
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if (X(WintunCreateAdapter, WINTUN_CREATE_ADAPTER_FUNC) || X(WintunDeleteAdapter, WINTUN_DELETE_ADAPTER_FUNC) ||
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X(WintunDeleteDriver, WINTUN_DELETE_DRIVER_FUNC) || X(WintunEnumAdapters, WINTUN_ENUM_ADAPTERS_FUNC) ||
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X(WintunFreeAdapter, WINTUN_FREE_ADAPTER_FUNC) || X(WintunGetAdapter, WINTUN_GET_ADAPTER_FUNC) ||
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X(WintunDeletePoolDriver, WINTUN_DELETE_POOL_DRIVER_FUNC) ||
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X(WintunEnumAdapters, WINTUN_ENUM_ADAPTERS_FUNC) || X(WintunFreeAdapter, WINTUN_FREE_ADAPTER_FUNC) ||
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X(WintunGetAdapter, WINTUN_GET_ADAPTER_FUNC) ||
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X(WintunGetAdapterDeviceObject, WINTUN_GET_ADAPTER_DEVICE_OBJECT_FUNC) ||
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X(WintunGetAdapterGUID, WINTUN_GET_ADAPTER_GUID_FUNC) ||
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X(WintunGetAdapterLUID, WINTUN_GET_ADAPTER_LUID_FUNC) ||
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@ -315,17 +316,14 @@ main(void)
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}
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DWORD Version = WintunGetVersion();
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Log(WINTUN_LOG_INFO,
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L"Wintun v%u.%u loaded",
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(Version >> 16) & 0xff,
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(Version >> 0) & 0xff);
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Log(WINTUN_LOG_INFO, L"Wintun v%u.%u loaded", (Version >> 16) & 0xff, (Version >> 0) & 0xff);
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MIB_UNICASTIPADDRESS_ROW AddressRow;
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InitializeUnicastIpAddressEntry(&AddressRow);
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WintunGetAdapterLUID(Adapter, &AddressRow.InterfaceLuid);
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AddressRow.Address.Ipv4.sin_family = AF_INET;
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AddressRow.Address.Ipv4.sin_addr.S_un.S_addr = htonl((10 << 24) | (6 << 16) | (7 << 8) | (7 << 0)); /* 10.6.7.7 */
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AddressRow.OnLinkPrefixLength = 24; /* This is a /24 network */
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AddressRow.OnLinkPrefixLength = 24; /* This is a /24 network */
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Result = CreateUnicastIpAddressEntry(&AddressRow);
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if (Result != ERROR_SUCCESS)
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{
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