MINIPORT_CANCEL_DIRECT_OID_REQUEST callback function (ndis.h)

Artikel
10/21/2021

NDIS calls a miniport driver's MiniportCancelDirectOidRequest function to cancel a direct OID request.

Note You must declare the function by using the MINIPORT_CANCEL_DIRECT_OID_REQUEST type. For more information, see the following Examples section.

Syntax

MINIPORT_CANCEL_DIRECT_OID_REQUEST MiniportCancelDirectOidRequest;

void MiniportCancelDirectOidRequest(
  [in] NDIS_HANDLE MiniportAdapterContext,
  [in] PVOID RequestId
)
{...}

Parameters

[in] MiniportAdapterContext

A handle to a context area that the miniport driver allocated in its MiniportInitializeEx function. The miniport driver uses this context area to maintain state information for a miniport adapter.

[in] RequestId

A cancellation identifier for the request. This identifier specifies the direct OID requests that match this value in the RequestId member of the NDIS_OID_REQUEST structure.

Return value

None

Remarks

MiniportCancelDirectOidRequest is an optional function. A miniport driver registers this function if it handles direct OID requests. A driver specifies the MiniportCancelDirectOidRequest entry point when it calls the NdisMRegisterMiniportDriver function. A miniport driver that registers the MiniportDirectOidRequest function must also register MiniportCancelDirectOidRequest.

When NDIS calls MiniportCancelDirectOidRequest, the miniport driver should attempt to call NdisMDirectOidRequestComplete function as soon as possible.

NDIS calls MiniportCancelDirectOidRequest when the originator of the request cancels the request. For direct OID requests, NDIS does not call MiniportCancelDirectOidRequest if the time-out expires. (The time-out is specified at the Timeout member of each NDIS_OID_REQUEST structure.)

If the request processing is still not complete in a miniport driver, the driver calls the NdisMDirectOidRequestComplete function with the status set to NDIS_STATUS_REQUEST_ABORTED.

If the request processing is still not complete in an intermediate driver and the request was propagated to an underlying driver, the intermediate driver calls the NdisCancelDirectOidRequest function with the OidRequest parameter set to the value that it sent to the underlying driver.

NDIS calls MiniportCancelDirectOidRequest at IRQL <= DISPATCH_LEVEL.

Examples

To define a MiniportCancelDirectOidRequest function, you must first provide a function declaration that identifies the type of function you're defining. Windows provides a set of function types for drivers. Declaring a function using the function types helps Code Analysis for Drivers, Static Driver Verifier (SDV), and other verification tools find errors, and it's a requirement for writing drivers for the Windows operating system.

For example, to define a MiniportCancelDirectOidRequest function that is named "MyCancelDirectOidRequest", use the MINIPORT_CANCEL_DIRECT_OID_REQUEST type as shown in this code example:

MINIPORT_CANCEL_DIRECT_OID_REQUEST MyCancelDirectOidRequest;

Then, implement your function as follows:

_Use_decl_annotations_
VOID
 MyCancelDirectOidRequest(
    NDIS_HANDLE  MiniportAdapterContext,
    PVOID  RequestId
    )
  {...}

The MINIPORT_CANCEL_DIRECT_OID_REQUEST function type is defined in the Ndis.h header file. To more accurately identify errors when you run the code analysis tools, be sure to add the Use_decl_annotations annotation to your function definition. The Use_decl_annotations annotation ensures that the annotations that are applied to the MINIPORT_CANCEL_DIRECT_OID_REQUEST function type in the header file are used. For more information about the requirements for function declarations, see Declaring Functions by Using Function Role Types for NDIS Drivers.

For information about Use_decl_annotations, see Annotating Function Behavior.

Requirements

Requirement	Value
Minimum supported client	Supported in NDIS 6.1 and later.
Target Platform	Windows
Header	ndis.h (include Ndis.h)
IRQL	<= DISPATCH_LEVEL

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