IOCTL_USB_GET_HUB_CAPABILITIES IOCTL

Description

The IOCTL_USB_GET_HUB_CAPABILITIES I/O control request retrieves the capabilities of a USB hub. Note This request is replaced by IOCTL_USB_GET_HUB_CAPABILITIES_EX in Windows Vista.

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

Parameters

Major code

Input buffer

None.

Input buffer length

None.

Output buffer

The AssociatedIrp.SystemBuffer member points to a user-allocated USB_HUB_CAPABILITIES structure that describes the hub capabilities.

Output buffer length

The Parameters.DeviceIoControl.OutputBufferLength member indicates the size, in bytes, of the output buffer in SystemBuffer. The output buffer size must be >= sizeof(USB_HUB_CAPABILITIES).

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.

See also

IOCTL_USB_GET_HUB_CAPABILITIES_EX

USB_HUB_CAPABILITIES