Add support for setupapi.SetupDiOpenDevRegKey()

Furthermore setupapi.DevInfoData has been obsoleted.
SetupDiEnumDeviceInfo() fills existing SP_DEVINFO_DATA structure now.
As other functions of SetupAPI use SP_DEVINFO_DATA, converting it to
DevInfoData and back would hurt performance.

Signed-off-by: Simon Rozman <simon@rozman.si>

4 files changed, 75 insertions, 25 deletions

diff --git a/setupapi/setupapi_windows.go b/setupapi/setupapi_windows.go
index dad0967..282b9d0 100644
--- a/setupapi/setupapi_windows.go
+++ b/setupapi/setupapi_windows.go
@@ -10,12 +10,14 @@ import (
 	"unsafe"
 
 	"golang.org/x/sys/windows"
+	"golang.org/x/sys/windows/registry"
 )
 
 //sys	setupDiGetClassDevsEx(ClassGUID *windows.GUID, Enumerator *uint16, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName *uint16, reserved uintptr) (handle DevInfo, err error) [failretval==DevInfo(windows.InvalidHandle)] = setupapi.SetupDiGetClassDevsExW
 //sys	SetupDiDestroyDeviceInfoList(DeviceInfoSet DevInfo) (err error) = setupapi.SetupDiDestroyDeviceInfoList
 //sys	setupDiGetDeviceInfoListDetail(DeviceInfoSet DevInfo, DeviceInfoSetDetailData *_SP_DEVINFO_LIST_DETAIL_DATA) (err error) = setupapi.SetupDiGetDeviceInfoListDetailW
-//sys	setupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex uint32, DeviceInfoData *_SP_DEVINFO_DATA) (err error) = setupapi.SetupDiEnumDeviceInfo
+//sys	setupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex uint32, DeviceInfoData *SP_DEVINFO_DATA) (err error) = setupapi.SetupDiEnumDeviceInfo
+//sys	setupDiOpenDevRegKey(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA, Scope DICS_FLAG, HwProfile uint32, KeyType DIREG, samDesired uint32) (key windows.Handle, err error) [failretval==windows.InvalidHandle] = setupapi.SetupDiOpenDevRegKey
 
 // SetupDiGetClassDevsEx function returns a handle to a device information set that contains requested device information elements for a local or a remote computer.
 func SetupDiGetClassDevsEx(ClassGUID *windows.GUID, Enumerator string, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName string) (handle DevInfo, err error) {
@@ -55,18 +57,13 @@ func SetupDiGetDeviceInfoListDetail(DeviceInfoSet DevInfo) (data *DevInfoListDet
 }
 
 // SetupDiEnumDeviceInfo function returns a SP_DEVINFO_DATA structure that specifies a device information element in a device information set.
-func SetupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex int) (data *DevInfoData, err error) {
-	var _p0 _SP_DEVINFO_DATA
-	_p0.Size = uint32(unsafe.Sizeof(_p0))
-
-	err = setupDiEnumDeviceInfo(DeviceInfoSet, uint32(MemberIndex), &_p0)
-	if err != nil {
-		return
-	}
+func SetupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex int, data *SP_DEVINFO_DATA) error {
+	data.Size = uint32(unsafe.Sizeof(*data))
+	return setupDiEnumDeviceInfo(DeviceInfoSet, uint32(MemberIndex), data)
+}
 
-	data = &DevInfoData{
-		ClassGUID: _p0.ClassGUID,
-		DevInst:   _p0.DevInst,
-	}
-	return
+// SetupDiOpenDevRegKey function opens a registry key for device-specific configuration information.
+func SetupDiOpenDevRegKey(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA, Scope DICS_FLAG, HwProfile uint32, KeyType DIREG, samDesired uint32) (key registry.Key, err error) {
+	handle, err := setupDiOpenDevRegKey(DeviceInfoSet, DeviceInfoData, Scope, HwProfile, KeyType, samDesired)
+	return registry.Key(handle), err
 }
diff --git a/setupapi/setupapi_windows_test.go b/setupapi/setupapi_windows_test.go
index 8aa7221..25e712f 100644
--- a/setupapi/setupapi_windows_test.go
+++ b/setupapi/setupapi_windows_test.go
@@ -43,7 +43,7 @@ func TestSetupDiGetDeviceInfoListDetailLocal(t *testing.T) {
 	if err != nil {
 		t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
 	}
-	defer SetupDiDestroyDeviceInfoList(devInfoList)
+	defer devInfoList.Close()
 
 	data, err := SetupDiGetDeviceInfoListDetail(devInfoList)
 	if err != nil {
@@ -68,7 +68,7 @@ func TestSetupDiGetDeviceInfoListDetailRemote(t *testing.T) {
 	if err != nil {
 		t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
 	}
-	defer SetupDiDestroyDeviceInfoList(devInfoList)
+	defer devInfoList.Close()
 
 	data, err := SetupDiGetDeviceInfoListDetail(devInfoList)
 	if err != nil {
@@ -93,10 +93,11 @@ func TestSetupDiEnumDeviceInfo(t *testing.T) {
 	if err != nil {
 		t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
 	}
-	defer SetupDiDestroyDeviceInfoList(devInfoList)
+	defer devInfoList.Close()
 
+	var data SP_DEVINFO_DATA
 	for i := 0; true; i++ {
-		data, err := SetupDiEnumDeviceInfo(devInfoList, i)
+		err := SetupDiEnumDeviceInfo(devInfoList, i, &data)
 		if err != nil {
 			if errWin, ok := err.(syscall.Errno); ok && errWin == 259 /*ERROR_NO_MORE_ITEMS*/ {
 				break
@@ -109,3 +110,28 @@ func TestSetupDiEnumDeviceInfo(t *testing.T) {
 		}
 	}
 }
+
+func TestSetupDiOpenDevRegKey(t *testing.T) {
+	devInfoList, err := SetupDiGetClassDevsEx(&deviceClassNetGUID, "", 0, DIGCF_PRESENT, DevInfo(0), "")
+	if err != nil {
+		t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
+	}
+	defer devInfoList.Close()
+
+	var data SP_DEVINFO_DATA
+	for i := 0; true; i++ {
+		err := SetupDiEnumDeviceInfo(devInfoList, i, &data)
+		if err != nil {
+			if errWin, ok := err.(syscall.Errno); ok && errWin == 259 /*ERROR_NO_MORE_ITEMS*/ {
+				break
+			}
+			continue
+		}
+
+		key, err := SetupDiOpenDevRegKey(devInfoList, &data, DICS_FLAG_GLOBAL, 0, DIREG_DRV, windows.KEY_READ)
+		if err != nil {
+			t.Errorf("Error calling SetupDiOpenDevRegKey: %s", err.Error())
+		}
+		defer key.Close()
+	}
+}
diff --git a/setupapi/types_windows.go b/setupapi/types_windows.go
index e94d112..ef0725a 100644
--- a/setupapi/types_windows.go
+++ b/setupapi/types_windows.go
@@ -51,15 +51,28 @@ type DevInfoListDetailData struct {
 	RemoteMachineName   string
 }
 
-type _SP_DEVINFO_DATA struct {
+// SP_DEVINFO_DATA is a device information structure (references a device instance that is a member of a device information set)
+type SP_DEVINFO_DATA struct {
 	Size      uint32
 	ClassGUID windows.GUID
 	DevInst   uint32 // DEVINST handle
 	_         uintptr
 }
 
-// DevInfoData is a device information structure (references a device instance that is a member of a device information set)
-type DevInfoData struct {
-	ClassGUID windows.GUID
-	DevInst   uint32 // DEVINST handle
-}
+// DICS_FLAG specifies the scope of a device property change
+type DICS_FLAG uint32
+
+const (
+	DICS_FLAG_GLOBAL         DICS_FLAG = 0x00000001 // make change in all hardware profiles
+	DICS_FLAG_CONFIGSPECIFIC DICS_FLAG = 0x00000002 // make change in specified profile only
+	DICS_FLAG_CONFIGGENERAL  DICS_FLAG = 0x00000004 // 1 or more hardware profile-specific changes to follow
+)
+
+// DIREG specifies values for SetupDiCreateDevRegKey, SetupDiOpenDevRegKey, and SetupDiDeleteDevRegKey.
+type DIREG uint32
+
+const (
+	DIREG_DEV  DIREG = 0x00000001 // Open/Create/Delete device key
+	DIREG_DRV  DIREG = 0x00000002 // Open/Create/Delete driver key
+	DIREG_BOTH DIREG = 0x00000004 // Delete both driver and Device key
+)
diff --git a/setupapi/zsetupapi_windows.go b/setupapi/zsetupapi_windows.go
index 0896d45..e8bf8c2 100644
--- a/setupapi/zsetupapi_windows.go
+++ b/setupapi/zsetupapi_windows.go
@@ -43,6 +43,7 @@ var (
 	procSetupDiDestroyDeviceInfoList    = modsetupapi.NewProc("SetupDiDestroyDeviceInfoList")
 	procSetupDiGetDeviceInfoListDetailW = modsetupapi.NewProc("SetupDiGetDeviceInfoListDetailW")
 	procSetupDiEnumDeviceInfo           = modsetupapi.NewProc("SetupDiEnumDeviceInfo")
+	procSetupDiOpenDevRegKey            = modsetupapi.NewProc("SetupDiOpenDevRegKey")
 )
 
 func setupDiGetClassDevsEx(ClassGUID *windows.GUID, Enumerator *uint16, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName *uint16, reserved uintptr) (handle DevInfo, err error) {
@@ -82,7 +83,7 @@ func setupDiGetDeviceInfoListDetail(DeviceInfoSet DevInfo, DeviceInfoSetDetailDa
 	return
 }
 
-func setupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex uint32, DeviceInfoData *_SP_DEVINFO_DATA) (err error) {
+func setupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex uint32, DeviceInfoData *SP_DEVINFO_DATA) (err error) {
 	r1, _, e1 := syscall.Syscall(procSetupDiEnumDeviceInfo.Addr(), 3, uintptr(DeviceInfoSet), uintptr(MemberIndex), uintptr(unsafe.Pointer(DeviceInfoData)))
 	if r1 == 0 {
 		if e1 != 0 {
@@ -93,3 +94,16 @@ func setupDiEnumDeviceInfo(DeviceInfoSet DevInfo, MemberIndex uint32, DeviceInfo
 	}
 	return
 }
+
+func setupDiOpenDevRegKey(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA, Scope DICS_FLAG, HwProfile uint32, KeyType DIREG, samDesired uint32) (key windows.Handle, err error) {
+	r0, _, e1 := syscall.Syscall6(procSetupDiOpenDevRegKey.Addr(), 6, uintptr(DeviceInfoSet), uintptr(unsafe.Pointer(DeviceInfoData)), uintptr(Scope), uintptr(HwProfile), uintptr(KeyType), uintptr(samDesired))
+	key = windows.Handle(r0)
+	if key == windows.InvalidHandle {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}