From a2249449d60f69c1878612e2c2c0b9b37b10ce1b Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 23 Jul 2019 14:58:46 +0200 Subject: wintun: get interface path properly with cfgmgr --- tun/wintun/setupapi/setupapi_windows.go | 35 ++++++++++++++++ tun/wintun/setupapi/types_windows.go | 10 +++++ tun/wintun/setupapi/zsetupapi_windows.go | 69 +++++++++++++++++++------------- tun/wintun/wintun_windows.go | 9 +++-- 4 files changed, 93 insertions(+), 30 deletions(-) (limited to 'tun/wintun') diff --git a/tun/wintun/setupapi/setupapi_windows.go b/tun/wintun/setupapi/setupapi_windows.go index 764b3e6..60a8eb7 100644 --- a/tun/wintun/setupapi/setupapi_windows.go +++ b/tun/wintun/setupapi/setupapi_windows.go @@ -469,3 +469,38 @@ func (deviceInfoSet DevInfo) SelectedDevice() (*DevInfoData, error) { func (deviceInfoSet DevInfo) SetSelectedDevice(deviceInfoData *DevInfoData) error { return SetupDiSetSelectedDevice(deviceInfoSet, deviceInfoData) } + +//sys cm_Get_Device_Interface_List_Size(len *uint32, interfaceClass *windows.GUID, deviceID *uint16, flags uint32) (ret uint32) = CfgMgr32.CM_Get_Device_Interface_List_SizeW +//sys cm_Get_Device_Interface_List(interfaceClass *windows.GUID, deviceID *uint16, buffer *uint16, bufferLen uint32, flags uint32) (ret uint32) = CfgMgr32.CM_Get_Device_Interface_ListW + +func CM_Get_Device_Interface_List(deviceID string, interfaceClass *windows.GUID, flags uint32) ([]string, error) { + deviceID16, err := windows.UTF16PtrFromString(deviceID) + if err != nil { + return nil, err + } + var buf []uint16 + var buflen uint32 + for { + if ret := cm_Get_Device_Interface_List_Size(&buflen, interfaceClass, deviceID16, flags); ret != CR_SUCCESS { + return nil, fmt.Errorf("CfgMgr error: 0x%x", ret) + } + buf = make([]uint16, buflen) + if ret := cm_Get_Device_Interface_List(interfaceClass, deviceID16, &buf[0], buflen, flags); ret == CR_SUCCESS { + break + } else if ret != CR_BUFFER_SMALL { + return nil, fmt.Errorf("CfgMgr error: 0x%x", ret) + } + } + var interfaces []string + for i := 0; i < len(buf); { + j := i + wcslen(buf[i:]) + if i < j { + interfaces = append(interfaces, windows.UTF16ToString(buf[i:j])) + } + i = j + 1 + } + if interfaces == nil { + return nil, fmt.Errorf("no interfaces found") + } + return interfaces, nil +} diff --git a/tun/wintun/setupapi/types_windows.go b/tun/wintun/setupapi/types_windows.go index 6ceda09..136b4be 100644 --- a/tun/wintun/setupapi/types_windows.go +++ b/tun/wintun/setupapi/types_windows.go @@ -556,3 +556,13 @@ const ( SPDRP_MAXIMUM_PROPERTY SPDRP = 0x00000025 // Upper bound on ordinals ) + +const ( + CR_SUCCESS = 0x0 + CR_BUFFER_SMALL = 0x1a +) + +const ( + CM_GET_DEVICE_INTERFACE_LIST_PRESENT = 0 // only currently 'live' device interfaces + CM_GET_DEVICE_INTERFACE_LIST_ALL_DEVICES = 1 // all registered device interfaces, live or not +) diff --git a/tun/wintun/setupapi/zsetupapi_windows.go b/tun/wintun/setupapi/zsetupapi_windows.go index 0949718..375862d 100644 --- a/tun/wintun/setupapi/zsetupapi_windows.go +++ b/tun/wintun/setupapi/zsetupapi_windows.go @@ -38,33 +38,36 @@ func errnoErr(e syscall.Errno) error { var ( modsetupapi = windows.NewLazySystemDLL("setupapi.dll") - - procSetupDiCreateDeviceInfoListExW = modsetupapi.NewProc("SetupDiCreateDeviceInfoListExW") - procSetupDiGetDeviceInfoListDetailW = modsetupapi.NewProc("SetupDiGetDeviceInfoListDetailW") - procSetupDiCreateDeviceInfoW = modsetupapi.NewProc("SetupDiCreateDeviceInfoW") - procSetupDiEnumDeviceInfo = modsetupapi.NewProc("SetupDiEnumDeviceInfo") - procSetupDiDestroyDeviceInfoList = modsetupapi.NewProc("SetupDiDestroyDeviceInfoList") - procSetupDiBuildDriverInfoList = modsetupapi.NewProc("SetupDiBuildDriverInfoList") - procSetupDiCancelDriverInfoSearch = modsetupapi.NewProc("SetupDiCancelDriverInfoSearch") - procSetupDiEnumDriverInfoW = modsetupapi.NewProc("SetupDiEnumDriverInfoW") - procSetupDiGetSelectedDriverW = modsetupapi.NewProc("SetupDiGetSelectedDriverW") - procSetupDiSetSelectedDriverW = modsetupapi.NewProc("SetupDiSetSelectedDriverW") - procSetupDiGetDriverInfoDetailW = modsetupapi.NewProc("SetupDiGetDriverInfoDetailW") - procSetupDiDestroyDriverInfoList = modsetupapi.NewProc("SetupDiDestroyDriverInfoList") - procSetupDiGetClassDevsExW = modsetupapi.NewProc("SetupDiGetClassDevsExW") - procSetupDiCallClassInstaller = modsetupapi.NewProc("SetupDiCallClassInstaller") - procSetupDiOpenDevRegKey = modsetupapi.NewProc("SetupDiOpenDevRegKey") - procSetupDiGetDeviceRegistryPropertyW = modsetupapi.NewProc("SetupDiGetDeviceRegistryPropertyW") - procSetupDiSetDeviceRegistryPropertyW = modsetupapi.NewProc("SetupDiSetDeviceRegistryPropertyW") - procSetupDiGetDeviceInstallParamsW = modsetupapi.NewProc("SetupDiGetDeviceInstallParamsW") - procSetupDiGetDeviceInstanceIdW = modsetupapi.NewProc("SetupDiGetDeviceInstanceIdW") - procSetupDiGetClassInstallParamsW = modsetupapi.NewProc("SetupDiGetClassInstallParamsW") - procSetupDiSetDeviceInstallParamsW = modsetupapi.NewProc("SetupDiSetDeviceInstallParamsW") - procSetupDiSetClassInstallParamsW = modsetupapi.NewProc("SetupDiSetClassInstallParamsW") - procSetupDiClassNameFromGuidExW = modsetupapi.NewProc("SetupDiClassNameFromGuidExW") - procSetupDiClassGuidsFromNameExW = modsetupapi.NewProc("SetupDiClassGuidsFromNameExW") - procSetupDiGetSelectedDevice = modsetupapi.NewProc("SetupDiGetSelectedDevice") - procSetupDiSetSelectedDevice = modsetupapi.NewProc("SetupDiSetSelectedDevice") + modCfgMgr32 = windows.NewLazySystemDLL("CfgMgr32.dll") + + procSetupDiCreateDeviceInfoListExW = modsetupapi.NewProc("SetupDiCreateDeviceInfoListExW") + procSetupDiGetDeviceInfoListDetailW = modsetupapi.NewProc("SetupDiGetDeviceInfoListDetailW") + procSetupDiCreateDeviceInfoW = modsetupapi.NewProc("SetupDiCreateDeviceInfoW") + procSetupDiEnumDeviceInfo = modsetupapi.NewProc("SetupDiEnumDeviceInfo") + procSetupDiDestroyDeviceInfoList = modsetupapi.NewProc("SetupDiDestroyDeviceInfoList") + procSetupDiBuildDriverInfoList = modsetupapi.NewProc("SetupDiBuildDriverInfoList") + procSetupDiCancelDriverInfoSearch = modsetupapi.NewProc("SetupDiCancelDriverInfoSearch") + procSetupDiEnumDriverInfoW = modsetupapi.NewProc("SetupDiEnumDriverInfoW") + procSetupDiGetSelectedDriverW = modsetupapi.NewProc("SetupDiGetSelectedDriverW") + procSetupDiSetSelectedDriverW = modsetupapi.NewProc("SetupDiSetSelectedDriverW") + procSetupDiGetDriverInfoDetailW = modsetupapi.NewProc("SetupDiGetDriverInfoDetailW") + procSetupDiDestroyDriverInfoList = modsetupapi.NewProc("SetupDiDestroyDriverInfoList") + procSetupDiGetClassDevsExW = modsetupapi.NewProc("SetupDiGetClassDevsExW") + procSetupDiCallClassInstaller = modsetupapi.NewProc("SetupDiCallClassInstaller") + procSetupDiOpenDevRegKey = modsetupapi.NewProc("SetupDiOpenDevRegKey") + procSetupDiGetDeviceRegistryPropertyW = modsetupapi.NewProc("SetupDiGetDeviceRegistryPropertyW") + procSetupDiSetDeviceRegistryPropertyW = modsetupapi.NewProc("SetupDiSetDeviceRegistryPropertyW") + procSetupDiGetDeviceInstallParamsW = modsetupapi.NewProc("SetupDiGetDeviceInstallParamsW") + procSetupDiGetDeviceInstanceIdW = modsetupapi.NewProc("SetupDiGetDeviceInstanceIdW") + procSetupDiGetClassInstallParamsW = modsetupapi.NewProc("SetupDiGetClassInstallParamsW") + procSetupDiSetDeviceInstallParamsW = modsetupapi.NewProc("SetupDiSetDeviceInstallParamsW") + procSetupDiSetClassInstallParamsW = modsetupapi.NewProc("SetupDiSetClassInstallParamsW") + procSetupDiClassNameFromGuidExW = modsetupapi.NewProc("SetupDiClassNameFromGuidExW") + procSetupDiClassGuidsFromNameExW = modsetupapi.NewProc("SetupDiClassGuidsFromNameExW") + procSetupDiGetSelectedDevice = modsetupapi.NewProc("SetupDiGetSelectedDevice") + procSetupDiSetSelectedDevice = modsetupapi.NewProc("SetupDiSetSelectedDevice") + procCM_Get_Device_Interface_List_SizeW = modCfgMgr32.NewProc("CM_Get_Device_Interface_List_SizeW") + procCM_Get_Device_Interface_ListW = modCfgMgr32.NewProc("CM_Get_Device_Interface_ListW") ) func setupDiCreateDeviceInfoListEx(classGUID *windows.GUID, hwndParent uintptr, machineName *uint16, reserved uintptr) (handle DevInfo, err error) { @@ -381,3 +384,15 @@ func SetupDiSetSelectedDevice(deviceInfoSet DevInfo, deviceInfoData *DevInfoData } return } + +func cm_Get_Device_Interface_List_Size(len *uint32, interfaceClass *windows.GUID, deviceID *uint16, flags uint32) (ret uint32) { + r0, _, _ := syscall.Syscall6(procCM_Get_Device_Interface_List_SizeW.Addr(), 4, uintptr(unsafe.Pointer(len)), uintptr(unsafe.Pointer(interfaceClass)), uintptr(unsafe.Pointer(deviceID)), uintptr(flags), 0, 0) + ret = uint32(r0) + return +} + +func cm_Get_Device_Interface_List(interfaceClass *windows.GUID, deviceID *uint16, buffer *uint16, bufferLen uint32, flags uint32) (ret uint32) { + r0, _, _ := syscall.Syscall6(procCM_Get_Device_Interface_ListW.Addr(), 5, uintptr(unsafe.Pointer(interfaceClass)), uintptr(unsafe.Pointer(deviceID)), uintptr(unsafe.Pointer(buffer)), uintptr(bufferLen), uintptr(flags), 0) + ret = uint32(r0) + return +} diff --git a/tun/wintun/wintun_windows.go b/tun/wintun/wintun_windows.go index 0dabcbb..26ebf60 100644 --- a/tun/wintun/wintun_windows.go +++ b/tun/wintun/wintun_windows.go @@ -29,7 +29,7 @@ type Wintun struct { } var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}} -var deviceInterfaceNetGUID = windows.GUID{Data1: 0xcac88484, Data2: 0x7515, Data3: 0x4c03, Data4: [8]byte{ 0x82, 0xe6, 0x71, 0xa8, 0x7a, 0xba, 0xc3, 0x61}} +var deviceInterfaceNetGUID = windows.GUID{Data1: 0xcac88484, Data2: 0x7515, Data3: 0x4c03, Data4: [8]byte{0x82, 0xe6, 0x71, 0xa8, 0x7a, 0xba, 0xc3, 0x61}} const ( hardwareID = "Wintun" @@ -622,8 +622,11 @@ func (wintun *Wintun) deviceData() (setupapi.DevInfo, *setupapi.DevInfoData, err // AdapterHandle returns a handle to the adapter device object. func (wintun *Wintun) AdapterHandle() (windows.Handle, error) { - mangledPnpNode := strings.ReplaceAll(fmt.Sprintf("%s\\%s", wintun.devInstanceID, deviceInterfaceNetGUID.String()), "\\", "#") - handle, err := windows.CreateFile(windows.StringToUTF16Ptr(fmt.Sprintf("\\\\.\\Global\\%s", mangledPnpNode)), windows.GENERIC_READ|windows.GENERIC_WRITE, windows.FILE_SHARE_READ | windows.FILE_SHARE_WRITE | windows.FILE_SHARE_DELETE, nil, windows.OPEN_EXISTING, 0, 0) + interfaces, err := setupapi.CM_Get_Device_Interface_List(wintun.devInstanceID, &deviceInterfaceNetGUID, setupapi.CM_GET_DEVICE_INTERFACE_LIST_PRESENT) + if err != nil { + return windows.InvalidHandle, err + } + handle, err := windows.CreateFile(windows.StringToUTF16Ptr(interfaces[0]), windows.GENERIC_READ|windows.GENERIC_WRITE, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE|windows.FILE_SHARE_DELETE, nil, windows.OPEN_EXISTING, 0, 0) if err != nil { return windows.InvalidHandle, fmt.Errorf("Open NDIS device failed: %v", err) } -- cgit v1.2.3