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wintun: give better errors when ndis interface listing fails

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This commit is contained in:
Jason A. Donenfeld 2019-08-28 08:39:26 -06:00
parent 3bf3322b2c
commit da28a3e9f3
1 changed files with 2 additions and 2 deletions
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4
tun/wintun/wintun_windows.go
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@ -687,11 +687,11 @@ func (wintun *Wintun) deviceData() (setupapi.DevInfo, *setupapi.DevInfoData, err
func (wintun *Wintun) AdapterHandle() (windows.Handle, error) {
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
return windows.InvalidHandle, fmt.Errorf("Error listing NDIS interfaces: %v", 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)
return windows.InvalidHandle, fmt.Errorf("Error opening NDIS device: %v", err)
}
return handle, nil
}