IOCTL_INTERNAL_USB_GET_PORT_STATUS IOCTL

Description

The IOCTL_INTERNAL_USB_GET_PORT_STATUS I/O request queries the status of the PDO.

IOCTL_INTERNAL_USB_GET_PORT_STATUS is a kernel-mode I/O control request. This request targets the USB hub PDO. This IOCTL must be sent at IRQL = PASSIVE_LEVEL.

Parameters

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

Parameters.Others.Argument1 should be a pointer to a ULONG to be filled in with the port status flags.

Input buffer length

The size of a ULONG.

Output buffer

Parameters.Others.Argument1 points to a ULONG that has the port status flags filled in. The flags can be one or both of USBD_PORT_ENABLED (bit 0) or USBD_PORT_CONNECTED (bit 1). When the USB_PORT_ENABLED bit is set, the port has been enabled after resetting the device connected to the port. When the USB_PORT_ENABLED bit is clear, software has disabled the port or hardware has disabled it due to abnormal hardware conditions. When the USB_PORT_CONNECTED bit is set, the host controller root hub or external hub has detected that a device is connected to the port. When the USB_PORT_CONNECTED bit is clear, the host controller root hub or external hub has detected that a device is not connected to the port.

Output buffer length

The size of a ULONG.

Input/output buffer

Input/output buffer length

Status block

The bus or port driver sets Irp->IoStatus.Status to STATUS_SUCCESS or the appropriate error status.