public static extern Boolean DeviceIoControl(IntPtr hDevice,
Int32 dwIoControlCode,
ref UsbNodeInformation lpInBuffer,
Int32 nInBufferSize,
ref UsbNodeInformation lpOutBuffer,
Int32 nOutBufferSize,
out Int32 lpBytesReturned,
IntPtr lpOverlapped);
/// <summary>
/// 获取USB集线器节点信息。
/// </summary>
/// <param name="usbHubPath">USB集线器路径。</param>
/// <returns>USB集线器节点信息。</returns>
public static Datas.UsbNodeInformation GetUsbHubNodeInformation(String usbHubPath)
{
if (String.IsNullOrWhiteSpace(usbHubPath))
{
return(null);
}
IntPtr hcdPtr = Win32Api.CreateFile($@"\\.\{usbHubPath}",
NativeFileAccess.GENERIC_WRITE,
NativeFileShare.FILE_SHARE_WRITE,
IntPtr.Zero,
NativeFileMode.OPEN_EXISTING,
IntPtr.Zero,
IntPtr.Zero);
if (hcdPtr == Win32Api.INVALID_HANDLE_VALUE)
{
return(null);
}
Int32 bytesReturned;
Primitives.UsbNodeInformation buffer = new Primitives.UsbNodeInformation();
Boolean status = Win32Api.DeviceIoControl(hcdPtr,
Win32Api.IOCTL_USB_GET_NODE_INFORMATION,
ref buffer,
Marshal.SizeOf(buffer),
ref buffer,
Marshal.SizeOf(buffer),
out bytesReturned,
IntPtr.Zero);
Win32Api.CloseHandle(hcdPtr);
if (!status)
{
return(null);
}
Datas.UsbNodeInformation nodeInfo = new Datas.UsbNodeInformation
{
NodeType = buffer.NodeType,
PNPDeviceId = GetDeviceIdFromPath(usbHubPath),
DevicePath = usbHubPath,
Name = GetUsbHubName(usbHubPath),
};
if (nodeInfo.NodeType == UsbHubNode.UsbHub)
{
nodeInfo.NumberOfPorts = buffer.U.HubInformation.HubDescriptor.NumberOfPorts;
nodeInfo.HubCharateristics = buffer.U.HubInformation.HubDescriptor.HubCharacteristics;
nodeInfo.PowerOnToPowerGood = buffer.U.HubInformation.HubDescriptor.PowerOnToPowerGood;
nodeInfo.HubControlCurrent = buffer.U.HubInformation.HubDescriptor.HubControlCurrent;
nodeInfo.HubIsBusPowered = buffer.U.HubInformation.HubIsBusPowered;
}
else
{
nodeInfo.NumberOfInterfaces = buffer.U.MiParentInformation.NumberOfInterfaces;
}
return(nodeInfo);
}
