IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION IOCTL (usbioctl.h)
The IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION I/O control request retrieves one or more descriptors for the device that is associated with the indicated port index.
IOCTL_USB_GET_DESCRIPTOR_FROM_NODE_CONNECTION is a user-mode I/O control request. This request targets the USB hub device (GUID_DEVINTERFACE_USB_HUB).
Major code
Input buffer
The AssociatedIrp.SystemBuffer member points to a USB_DESCRIPTOR_REQUEST structure that describes the descriptor request.
Input buffer length
The Parameters.DeviceIoControl.OutputBufferLength member indicates the size, in bytes, of the user-allocated output buffer in the Data member of the USB_DESCRIPTOR_REQUEST structure.
Output buffer
The Data member of the USB_DESCRIPTOR_REQUEST structure at AssociatedIrp.SystemBuffer points to the output buffer.
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.
Requirements
| Requirement | Value |
|---|---|
| Header | usbioctl.h (include Usbioctl.h) |
See also
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