IOCTL_USB_GET_HUB_CAPABILITIES_EX - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// usbioctl.h

// CTL_CODE(0x0022, 0x114, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_USB_GET_HUB_CAPABILITIES_EX 0x00220450
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Windows Driver Kit DDI reference (ni-usbioctl-ioctl_usb_get_hub_capabilities_ex)

IOCTL_USB_GET_HUB_CAPABILITIES_EX IOCTL

Description

The IOCTL_USB_GET_HUB_CAPABILITIES_EX I/O control request retrieves the capabilities of a USB hub.

IOCTL_USB_GET_HUB_CAPABILITIES_EX 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 buffer.

Input buffer length

The buffer length equals sizeof(USB_HUB_CAPABILITIES_EX).

Output buffer

AssociatedIrp.SystemBuffer points to a user-allocated USB_HUB_CAPABILITIES_EX structure. On output, this structure describes the hub capabilities.

Output buffer length

The Parameters.DeviceIoControl.OutputBufferLength member indicates the size, in bytes, of the data that is returned at SystemBuffer, or sizeof(USB_HUB_CAPABILITIES_EX).

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_HUB_CAPABILITIES_EX

View the official Windows Driver Kit DDI reference

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