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Code Issues Releases Wiki Activity

Finish support for setupapi.SetupDiGetClassDevsEx()

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2019-02-01 10:58:06 +01:00 committed by Jason A. Donenfeld
parent 31949136df
commit d41bc015cc
4 changed files with 110 additions and 29 deletions
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50
setupapi/setupapi_windows.go
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@ -6,6 +6,8 @@
package setupapi
import (
"syscall"
"golang.org/x/sys/windows"
)
@ -16,26 +18,42 @@ const (
type DIGCF uint32
const (
Default DIGCF = 0x00000001
Present DIGCF = 0x00000002
AllClasses DIGCF = 0x00000004
Profile DIGCF = 0x00000008
DeviceInterface DIGCF = 0x00000010
InterfaceDevice DIGCF = 0x00000010
DIGCF_DEFAULT DIGCF = 0x00000001 // only valid with DIGCF_DEVICEINTERFACE
DIGCF_PRESENT DIGCF = 0x00000002
DIGCF_ALLCLASSES DIGCF = 0x00000004
DIGCF_PROFILE DIGCF = 0x00000008
DIGCF_DEVICEINTERFACE DIGCF = 0x00000010
)
type DevInfo windows.Handle
//sys setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *string, hwndParent uintptr, Flags uint32, DeviceInfoSet uintptr, MachineName string, reserved uint32) (handle windows.Handle, err error) = setupapi.SetupDiGetClassDevsExW
// The 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) (DevInfo, error) {
enumerator := &Enumerator
if Enumerator == "" {
enumerator = nil
// The SetupDiDestroyDeviceInfoList function deletes a device information set and frees all associated memory.
func (h DevInfo) Close() error {
if h != DevInfo(windows.InvalidHandle) {
return SetupDiDestroyDeviceInfoList(h)
}
h, err := setupDiGetClassDevsEx(ClassGuid, enumerator, hwndParent, uint32(Flags), uintptr(DeviceInfoSet), MachineName, 0)
return DevInfo(h), err
return nil
}
//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
// The 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) {
var _p0 *uint16
if Enumerator != "" {
_p0, err = syscall.UTF16PtrFromString(Enumerator)
if err != nil {
return
}
}
var _p1 *uint16
if MachineName != "" {
_p1, err = syscall.UTF16PtrFromString(MachineName)
if err != nil {
return
}
}
return setupDiGetClassDevsEx(ClassGuid, _p0, hwndParent, Flags, DeviceInfoSet, _p1, 0)
}

39
setupapi/setupapi_windows_test.go Normal file
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@ -0,0 +1,39 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package setupapi
import (
"syscall"
"testing"
"golang.org/x/sys/windows"
)
func TestSetupDiGetClassDevsEx(t *testing.T) {
guidDeviceClassNet := windows.GUID{0x4d36e972, 0xe325, 0x11ce, [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
compName, err := windows.ComputerName()
if err != nil {
t.Errorf("Error getting computer name: %s", err.Error())
}
dev_info_list, err := SetupDiGetClassDevsEx(&guidDeviceClassNet, "PCI", 0, DIGCF_PRESENT, DevInfo(0), compName)
if err == nil {
dev_info_list.Close()
} else {
t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
}
dev_info_list, err = SetupDiGetClassDevsEx(nil, "", 0, DIGCF_PRESENT, DevInfo(0), "")
if err == nil {
dev_info_list.Close()
t.Errorf("SetupDiGetClassDevsEx(nil, ...) should fail")
} else {
if errWin, ok := err.(syscall.Errno); !ok || errWin != 87 /*ERROR_INVALID_PARAMETER*/ {
t.Errorf("SetupDiGetClassDevsEx(nil, ...) should fail with ERROR_INVALID_PARAMETER")
}
}
}

30
setupapi/zsetupapi_windows.go
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@ -39,22 +39,26 @@ func errnoErr(e syscall.Errno) error {
var (
modsetupapi = windows.NewLazySystemDLL("setupapi.dll")
procSetupDiGetClassDevsExW = modsetupapi.NewProc("SetupDiGetClassDevsExW")
procSetupDiGetClassDevsExW = modsetupapi.NewProc("SetupDiGetClassDevsExW")
procSetupDiDestroyDeviceInfoList = modsetupapi.NewProc("SetupDiDestroyDeviceInfoList")
)
func setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *string, hwndParent uintptr, Flags uint32, DeviceInfoSet uintptr, MachineName string, reserved uint32) (handle windows.Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(MachineName)
if err != nil {
return
}
return _setupDiGetClassDevsEx(ClassGuid, Enumerator, hwndParent, Flags, DeviceInfoSet, _p0, reserved)
}
func _setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *string, hwndParent uintptr, Flags uint32, DeviceInfoSet uintptr, MachineName *uint16, reserved uint32) (handle windows.Handle, err error) {
func setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *uint16, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName *uint16, reserved uintptr) (handle DevInfo, err error) {
r0, _, e1 := syscall.Syscall9(procSetupDiGetClassDevsExW.Addr(), 7, uintptr(unsafe.Pointer(ClassGuid)), uintptr(unsafe.Pointer(Enumerator)), uintptr(hwndParent), uintptr(Flags), uintptr(DeviceInfoSet), uintptr(unsafe.Pointer(MachineName)), uintptr(reserved), 0, 0)
handle = windows.Handle(r0)
if handle == 0 {
handle = DevInfo(r0)
if handle == DevInfo(windows.InvalidHandle) {
if e1 != 0 {
err = errnoErr(e1)
} else {
err = syscall.EINVAL
}
}
return
}
func SetupDiDestroyDeviceInfoList(DeviceInfoSet DevInfo) (err error) {
r1, _, e1 := syscall.Syscall(procSetupDiDestroyDeviceInfoList.Addr(), 1, uintptr(DeviceInfoSet), 0, 0)
if r1 == 0 {
if e1 != 0 {
err = errnoErr(e1)
} else {

20
setupapi/zsetupapi_windows_test.go Normal file
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@ -0,0 +1,20 @@
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package setupapi
import (
"syscall"
"testing"
"golang.org/x/sys/windows"
)
func TestSetupDiDestroyDeviceInfoList(t *testing.T) {
err := SetupDiDestroyDeviceInfoList(DevInfo(windows.InvalidHandle))
if errWin, ok := err.(syscall.Errno); !ok || errWin != 6 /*ERROR_INVALID_HANDLE*/ {
t.Errorf("SetupDiDestroyDeviceInfoList(nil, ...) should fail with ERROR_INVALID_HANDLE")
}
}