wdfqueryinterface.h File Reference

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Classes
struct	_WDF_QUERY_INTERFACE_CONFIG

Macros
#define	WDF_EXTERN_C
#define	WDF_EXTERN_C_START
#define	WDF_EXTERN_C_END

Typedefs
typedef EVT_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST *	PFN_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST
typedef struct _WDF_QUERY_INTERFACE_CONFIG	WDF_QUERY_INTERFACE_CONFIG
typedef struct _WDF_QUERY_INTERFACE_CONFIG *	PWDF_QUERY_INTERFACE_CONFIG
typedef _Must_inspect_result_	_IRQL_requires_max_(PASSIVE_LEVEL) WDFAPI NTSTATUS(STDCALL *PFN_WDFDEVICEADDQUERYINTERFACE) (_In_ PWDF_DRIVER_GLOBALS DriverGlobals
typedef _Must_inspect_result_ _In_ WDFDEVICE	Device
typedef _Must_inspect_result_ _In_ WDFDEVICE _In_ PWDF_QUERY_INTERFACE_CONFIG	InterfaceConfig

Functions
WDF_EXTERN_C_START typedef	_Function_class_ (EVT_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST) _IRQL_requires_same_ _IRQL_requires_max_(PASSIVE_LEVEL) NTSTATUS STDCALL EVT_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST(_In_ WDFDEVICE Device
FORCEINLINE VOID	WDF_QUERY_INTERFACE_CONFIG_INIT (_Out_ PWDF_QUERY_INTERFACE_CONFIG InterfaceConfig, _In_opt_ PINTERFACE Interface, _In_ CONST GUID *InterfaceType, _In_opt_ PFN_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST EvtDeviceProcessQueryInterfaceRequest)
_Must_inspect_result_	_IRQL_requires_max_ (PASSIVE_LEVEL) FORCEINLINE NTSTATUS WdfDeviceAddQueryInterface(_In_ WDFDEVICE Device
	Queries information details about a security descriptor. More...
FORCEINLINE VOID	WdfDeviceInterfaceReferenceNoOp (_In_ PVOID Context)
FORCEINLINE VOID	WdfDeviceInterfaceDereferenceNoOp (_In_ PVOID Context)

Variables
WDF_EXTERN_C_START typedef _In_ LPGUID	InterfaceType
WDF_EXTERN_C_START typedef _In_ LPGUID _Inout_ PINTERFACE	ExposedInterface
WDF_EXTERN_C_START typedef _In_ LPGUID _Inout_ PINTERFACE _Inout_opt_ PVOID	ExposedInterfaceSpecificData

Macro Definition Documentation

WDF_EXTERN_C

#define WDF_EXTERN_C

Definition at line 38 of file wdfqueryinterface.h.

WDF_EXTERN_C_END

#define WDF_EXTERN_C_END

Definition at line 40 of file wdfqueryinterface.h.

WDF_EXTERN_C_START

#define WDF_EXTERN_C_START

Definition at line 39 of file wdfqueryinterface.h.

Typedef Documentation

_IRQL_requires_max_

typedef _Must_inspect_result_ _IRQL_requires_max_(PASSIVE_LEVEL) WDFAPI NTSTATUS(STDCALL *PFN_WDFDEVICEADDQUERYINTERFACE)(_In_ PWDF_DRIVER_GLOBALS DriverGlobals

Definition at line 152 of file wdfqueryinterface.h.

Device

typedef _Must_inspect_result_ _In_ WDFDEVICE Device

Definition at line 159 of file wdfqueryinterface.h.

InterfaceConfig

_Must_inspect_result_ _In_ PWDF_QUERY_INTERFACE_CONFIG InterfaceConfig

Initial value:

{
    return ((PFN_WDFDEVICEADDQUERYINTERFACE) WdfFunctions[WdfDeviceAddQueryInterfaceTableIndex])(WdfDriverGlobals, Device, InterfaceConfig)

Definition at line 159 of file wdfqueryinterface.h.

PFN_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST

typedef EVT_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST* PFN_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST

Definition at line 69 of file wdfqueryinterface.h.

PWDF_QUERY_INTERFACE_CONFIG

typedef struct _WDF_QUERY_INTERFACE_CONFIG * PWDF_QUERY_INTERFACE_CONFIG

WDF_QUERY_INTERFACE_CONFIG

typedef struct _WDF_QUERY_INTERFACE_CONFIG WDF_QUERY_INTERFACE_CONFIG

Function Documentation

_Function_class_()

WDF_EXTERN_C_START typedef _Function_class_

(

EVT_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST

)

_IRQL_requires_max_()

_Must_inspect_result_ _IRQL_requires_max_

(

PASSIVE_LEVEL

)

Queries information details about a security descriptor.

Computes the quota size of a security descriptor.

Assigns a security descriptor for a new object.

An extended function that assigns a security descriptor for a new object.

Frees a security descriptor.

An extended function that sets new information data to a security descriptor.

Modifies some information data about a security descriptor.

Parameters

[in]	SecurityInformation	Security information details to be queried from a security descriptor.
[out]	SecurityDescriptor	The returned security descriptor with security information data.
[in,out]	Length	The returned length of a security descriptor.
[in,out]	ObjectsSecurityDescriptor	The returned object security descriptor.

Returns

Returns STATUS_SUCCESS if the operations have been completed successfully and that the specific information about the security descriptor has been queried. STATUS_BUFFER_TOO_SMALL is returned if the buffer size is too small to contain the queried info about the security descriptor.

Parameters

[in]	Object	If specified, the function will use this arbitrary object that points to an object security descriptor.
[in]	SecurityInformation	Security information details to be set.
[in]	SecurityDescriptor	A security descriptor where its info is to be changed.
[in,out]	ObjectsSecurityDescriptor	The returned pointer to security descriptor objects.
[in]	PoolType	Pool type for the new security descriptor to allocate.
[in]	GenericMapping	The generic mapping of access rights masks.

Returns

See SeSetSecurityDescriptorInfoEx.

Parameters

[in]	Object	If specified, the function will use this arbitrary object that points to an object security descriptor.
[in]	SecurityInformation	Security information details to be set.
[in]	SecurityDescriptor	A security descriptor where its info is to be changed.
[in,out]	ObjectsSecurityDescriptor	The returned pointer to security descriptor objects.
[in]	AutoInheritFlags	Flags bitmask inheritation, influencing how the security descriptor can be inherited and if it can be in the first place.
[in]	PoolType	Pool type for the new security descriptor to allocate.
[in]	GenericMapping	The generic mapping of access rights masks.

Returns

Returns STATUS_SUCCESS if the operations have been completed without problems and that new info has been set to the security descriptor. STATUS_NO_SECURITY_ON_OBJECT is returned if the object does not have a security descriptor. STATUS_INSUFFICIENT_RESOURCES is returned if memory pool allocation for the new security descriptor with new info set has failed.

Parameters

[in]

SecurityDescriptor

A security descriptor to be freed from memory.

Returns

Returns STATUS_SUCCESS.

Parameters

[in]	_ParentDescriptor	A security descriptor of the parent object that is being created.
[in]	_ExplicitDescriptor	An explicit security descriptor that is applied to a new object.
[out]	NewDescriptor	The new allocated security descriptor.
[in]	ObjectType	The type of the new object.
[in]	IsDirectoryObject	Set this to TRUE if the newly created object is a directory object, otherwise set this to FALSE.
[in]	AutoInheritFlags	Automatic inheritance flags that influence how access control entries within ACLs from security descriptors are inherited.
[in]	SubjectContext	Security subject context of the new object.
[in]	GenericMapping	Generic mapping of access mask rights.
[in]	PoolType	This parameter is unused.

Returns

Returns STATUS_SUCCESS if the operations have been completed successfully and that the security descriptor has been assigned to the new object. STATUS_NO_TOKEN is returned if the caller hasn't supplied a valid argument to a security subject context. STATUS_INVALID_OWNER is returned if the caller hasn't supplied a parent descriptor that belongs to the main user (owner). STATUS_INVALID_PRIMARY_GROUP is returned by the same reason as with the previous NTSTATUS code. The two NTSTATUS codes are returned if the calling thread stated that the owner and/or group is defaulted to the parent descriptor (SEF_DEFAULT_OWNER_FROM_PARENT and/or SEF_DEFAULT_GROUP_FROM_PARENT respectively). STATUS_INSUFFICIENT_RESOURCES is returned if memory pool allocation for the descriptor buffer has failed. A failure NTSTATUS is returned otherwise.

Parameters

[in]	ParentDescriptor	A security descriptor of the parent object that is being created.
[in]	ExplicitDescriptor	An explicit security descriptor that is applied to a new object.
[out]	NewDescriptor	The new allocated security descriptor.
[in]	IsDirectoryObject	Set this to TRUE if the newly created object is a directory object, otherwise set this to FALSE.
[in]	SubjectContext	Security subject context of the new object.
[in]	GenericMapping	Generic mapping of access mask rights.
[in]	PoolType	This parameter is unused.

Returns

See SeAssignSecurityEx.

Parameters

[in]	SecurityDescriptor	A security descriptor.
[out]	QuotaInfoSize	The returned quota size of the given security descriptor to the caller. The function may return 0 to this parameter if the descriptor doesn't have a group or a discretionary access control list (DACL) even.

Returns

Returns STATUS_SUCCESS if the quota size of a security descriptor has been computed successfully. STATUS_UNKNOWN_REVISION is returned if the security descriptor has an invalid revision.

Definition at line 64 of file Messaging.c.

{
    PFLT_SERVER_PORT_OBJECT PortObject;
    NTSTATUS Status;

    /* The caller must allow at least one connection */
    if (MaxConnections == 0)
    {
        return STATUS_INVALID_PARAMETER;
    }

    /* The request must be for a kernel handle */
    if (!(ObjectAttributes->Attributes & OBJ_KERNEL_HANDLE))
    {
        return STATUS_INVALID_PARAMETER;
    }

    /*
     * Get rundown protection on the target to stop the owner
     * from unloading whilst this port object is open. It gets
     * removed in the FltpServerPortClose callback
     */
    Status = FltObjectReference(Filter);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }

    /* Create the server port object for this filter */
    Status = ObCreateObject(KernelMode,
                            ServerPortObjectType,
                            ObjectAttributes,
                            KernelMode,
                            NULL,
                            sizeof(FLT_SERVER_PORT_OBJECT),
                            0,
                            0,
                            (PVOID *)&PortObject);
    if (NT_SUCCESS(Status))
    {
        /* Zero out the struct */
        RtlZeroMemory(PortObject, sizeof(FLT_SERVER_PORT_OBJECT));

        /* Increment the ref count on the target filter */
        FltpObjectPointerReference((PFLT_OBJECT)Filter);

        /* Setup the filter port object */
        PortObject->Filter = Filter;
        PortObject->ConnectNotify = ConnectNotifyCallback;
        PortObject->DisconnectNotify = DisconnectNotifyCallback;
        PortObject->MessageNotify = MessageNotifyCallback;
        PortObject->Cookie = ServerPortCookie;
        PortObject->MaxConnections = MaxConnections;

        /* Insert the object */
        Status = ObInsertObject(PortObject,
                                NULL,
                                STANDARD_RIGHTS_ALL | FILE_READ_DATA,
                                0,
                                NULL,
                                (PHANDLE)ServerPort);
        if (NT_SUCCESS(Status))
        {
            /* Lock the connection list */
            ExAcquireFastMutex(&Filter->ConnectionList.mLock);

            /* Add the new port object to the connection list and increment the count */
            InsertTailList(&Filter->ConnectionList.mList, &PortObject->FilterLink);
            Filter->ConnectionList.mCount++;

            /* Unlock the connection list*/
            ExReleaseFastMutex(&Filter->ConnectionList.mLock);
        }
    }

    if (!NT_SUCCESS(Status))
    {
        /* Allow the filter to be cleaned up */
        FltObjectDereference(Filter);
    }

    return Status;
}

WDF_QUERY_INTERFACE_CONFIG_INIT()

FORCEINLINE VOID WDF_QUERY_INTERFACE_CONFIG_INIT	(	_Out_ PWDF_QUERY_INTERFACE_CONFIG	InterfaceConfig,
		_In_opt_ PINTERFACE	Interface,
		_In_ CONST GUID *	InterfaceType,
		_In_opt_ PFN_WDF_DEVICE_PROCESS_QUERY_INTERFACE_REQUEST	EvtDeviceProcessQueryInterfaceRequest
	)

Definition at line 131 of file wdfqueryinterface.h.

{
    RtlZeroMemory(InterfaceConfig, sizeof(WDF_QUERY_INTERFACE_CONFIG));

    InterfaceConfig->Size = sizeof(WDF_QUERY_INTERFACE_CONFIG);
    InterfaceConfig->Interface = Interface;
    InterfaceConfig->InterfaceType = InterfaceType;
    InterfaceConfig->EvtDeviceProcessQueryInterfaceRequest =
        EvtDeviceProcessQueryInterfaceRequest;
}

WdfDeviceInterfaceDereferenceNoOp()

FORCEINLINE VOID WdfDeviceInterfaceDereferenceNoOp

(

_In_ PVOID

Context

)

Definition at line 202 of file wdfqueryinterface.h.

{
    UNREFERENCED_PARAMETER(Context);
}

WdfDeviceInterfaceReferenceNoOp()

FORCEINLINE VOID WdfDeviceInterfaceReferenceNoOp

(

_In_ PVOID

Context

)

Definition at line 193 of file wdfqueryinterface.h.

{
    UNREFERENCED_PARAMETER(Context);
}

Variable Documentation

ExposedInterface

WDF_EXTERN_C_START typedef _In_ LPGUID _Inout_ PINTERFACE ExposedInterface

Definition at line 62 of file wdfqueryinterface.h.

Referenced by FxDeviceProcessQueryInterfaceRequest::Invoke().

ExposedInterfaceSpecificData

WDF_EXTERN_C_START typedef _In_ LPGUID _Inout_ PINTERFACE _Inout_opt_ PVOID ExposedInterfaceSpecificData

Definition at line 62 of file wdfqueryinterface.h.

Referenced by FxDeviceProcessQueryInterfaceRequest::Invoke().

InterfaceType

WDF_EXTERN_C_START typedef _In_ LPGUID InterfaceType

Definition at line 62 of file wdfqueryinterface.h.

Referenced by WDF_QUERY_INTERFACE_CONFIG_INIT().