MbbRequestGetBuffer function (mbbcx.h)

Artikel
02/22/2024

The client driver calls the MbbRequestGetBuffer method to get the memory location where an MBIM control message is stored or should be stored.

Syntax

PVOID MbbRequestGetBuffer(
  MBBREQUEST Request,
  size_t     *BufferSize
);

Parameters

Request

A handle to the framework object which represents a request from MBBCx framework, either to send a MBIM control command message to the device or to receive an MBIM control response message from the device.

BufferSize

A pointer to the location that receives the size, in bytes, of the MBIM control message fragment.

Return value

Returns a pointer to the memory location where the MBIM message is stored:

When this method is called on a request object passed from the EvtMbbDeviceSendMbimFragment callback function, it points to the MBIM control command fragment sent from the MBBCx framework to the device. This memory location is read-only.
When this method is called on a request object passed from the EvtMbbDeviceReceiveMbimFragment callback function, it points to an empty buffer to which the client driver should write the MBIM control response. This buffer is pre-allocated by the MBBCx framework and the BufferSize parameter specifies its size.

Remarks

For more information, see Handling MBIM control messages.

Requirements

Requirement	Value
Minimum supported client	Windows 10, version 1809
Target Platform	Universal
Minimum KMDF version	1.27
Header	mbbcx.h
Library	mbbcxstub.lib
IRQL	PASSIVE_LEVEL

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