public System.Collections.ObjectModel.ReadOnlyCollection<USBPort> GetPorts()
{
List<USBPort> PortList = new List<USBPort>();
IntPtr h = CreateFile(HubDevicePath, GENERIC_WRITE, FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
if (h.ToInt32() != INVALID_HANDLE_VALUE)
{
int nBytes = Marshal.SizeOf(typeof(USB_NODE_CONNECTION_INFORMATION_EX));
IntPtr ptrNodeConnection = Marshal.AllocHGlobal(nBytes);
for (int i = 1; i <= HubPortCount; i++)
{
int nBytesReturned;
USB_NODE_CONNECTION_INFORMATION_EX NodeConnection = new USB_NODE_CONNECTION_INFORMATION_EX();
NodeConnection.ConnectionIndex = i;
Marshal.StructureToPtr(NodeConnection, ptrNodeConnection, true);
if (DeviceIoControl(h, IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX, ptrNodeConnection, nBytes, ptrNodeConnection, nBytes, out nBytesReturned, IntPtr.Zero))
{
NodeConnection = (USB_NODE_CONNECTION_INFORMATION_EX)Marshal.PtrToStructure(ptrNodeConnection, typeof(USB_NODE_CONNECTION_INFORMATION_EX));
USBPort port = new USBPort();
port.PortPortNumber = i;
port.PortHubDevicePath = HubDevicePath;
USB_CONNECTION_STATUS Status = (USB_CONNECTION_STATUS)NodeConnection.ConnectionStatus;
port.PortStatus = Status.ToString();
USB_DEVICE_SPEED Speed = (USB_DEVICE_SPEED)NodeConnection.Speed;
port.PortSpeed = Speed.ToString();
port.PortIsDeviceConnected = (NodeConnection.ConnectionStatus == (int)USB_CONNECTION_STATUS.DeviceConnected);
port.PortIsHub = Convert.ToBoolean(NodeConnection.DeviceIsHub);
port.PortDeviceDescriptor = NodeConnection.DeviceDescriptor;
PortList.Add(port);
}
}
Marshal.FreeHGlobal(ptrNodeConnection);
CloseHandle(h);
}
return new System.Collections.ObjectModel.ReadOnlyCollection<USBPort>(PortList);
}
}