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The class driver sends this request to send a zero-length control status handshake on endpoint 0 in the IN direction.
Major code
IRP_MJ_INTERNAL_DEVICE_CONTROL
Input buffer
A USBFNPIPEID type value that indicates the pipe ID. The pipe ID of the default control endpoint is 0.
Input buffer length
The size of a USBFNPIPEID type.
Output buffer
NULL.
Output buffer length
NULL.
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.
Requirements
| Requirement | Value |
|---|---|
| Header | usbfnioctl.h |