IOCTL_USB_GET_NODE_CONNECTION_ATTRIBUTES IOCTL

Description

The IOCTL_USB_GET_NODE_CONNECTION_ATTRIBUTES I/O control request retrieves the Microsoft-extended port attributes for a specific port.

IOCTL_USB_GET_NODE_CONNECTION_ATTRIBUTES is a user-mode I/O control request. This request targets the USB hub device (GUID_DEVINTERFACE_USB_HUB).

Parameters

Major code

Input buffer

The AssociatedIrp.SystemBuffer member points to a user-allocated USB_NODE_CONNECTION_ATTRIBUTES structure. On input, the caller specifies the port number in the ConnectionIndex member of a USB_NODE_CONNECTION_ATTRIBUTES structure.

Input buffer length

The size of a USB_NODE_CONNECTION_ATTRIBUTES structure.

Output buffer

On output, the USB_NODE_CONNECTION_ATTRIBUTES structure at AssociatedIrp.SystemBuffer describes the Microsoft-extended port attributes for the port. Note For Windows Vista, Windows Server 2008, and Windows 7, the Microsoft-extended port attributes field is set to zero.

For Windows XP and Windows Server 2003, the Microsoft-extended port attribute might be set to USB_PORTATTR_NO_OVERCURRENT_UI. This value indicates that user interface will be hidden when an overcurrent occurs on the port.

Output buffer length

Parameters.DeviceIoControl.OutputBufferLength indicates the size, in bytes, of the data returned at SystemBuffer.

Input/output buffer

Input/output buffer length

Status block

The USB stack sets Irp->IoStatus.Status to STATUS_SUCCESS if the request is successful. Otherwise, the USB stack sets Status to the appropriate error condition, such as STATUS_INVALID_PARAMETER or STATUS_INSUFFICIENT_RESOURCES. If the hub has not been started or is not functional, the request returns STATUS_UNSUCCESSFUL.

See also

USB_NODE_CONNECTION_ATTRIBUTES