IOCTL_INTERNAL_USBFN_TRANSFER_IN - NtDoc

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

// CTL_CODE(0x002a, 0x003, METHOD_IN_DIRECT, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
#define IOCTL_INTERNAL_USBFN_TRANSFER_IN 0x002AC00D
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Windows Driver Kit DDI reference (ni-usbfnioctl-ioctl_internal_usbfn_transfer_in)

IOCTL_INTERNAL_USBFN_TRANSFER_IN IOCTL

Description

The class driver sends this request to initiate a data transfer to the host on the specified pipe.

Parameters

Major code

IRP_MJ_INTERNAL_DEVICE_CONTROL

Input buffer

A pointer to a USBFNPIPEID type that specifies the pipe ID.

Input buffer length

The size of a USBFNPIPEID type.

Output buffer

The output buffer points to a buffer containing the data to be sent. The IN direction is from the host perspective representing an outbound transfer from the device to the host.

Output buffer length

The length of the data to be sent.

Input/output buffer

Input/output buffer length

Status block

If the request is successful, the USB function class extension (UFX) returns STATUS_SUCCESS, or another status value for which NT_SUCCESS(status) equals TRUE. Otherwise it returns a status value for which NT_SUCCESS(status) equals FALSE.

Remarks

This request must be sent after sending the IOCTL_INTERNAL_USBFN_ACTIVATE_USB_BUS request.

UFX forwards this IOCTL request to the transfer queue created for the endpoint by UfxEndpointCreate.

View the official Windows Driver Kit DDI reference

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