NTSTATUS FindPropertyHandler	(	IN PIO_STATUS_BLOCK	IoStatus,
		IN const KSPROPERTY_SET *	PropertySet,
		IN ULONG	PropertySetCount,
		IN PKSPROPERTY	Property,
		IN ULONG	InputBufferLength,
		IN ULONG	OutputBufferLength,
		OUT PVOID	OutputBuffer,
		OUT PFNKSHANDLER *	PropertyHandler,
		OUT PKSPROPERTY_SET *	Set,
		OUT PKSPROPERTY_ITEM *	PropertyItem
	)
Definition at line 14 of file property.c.
Referenced by KspPropertyHandler().
{
    ULONG Index, ItemIndex;

    for(Index = 0; Index < PropertySetCount; Index++)
    {
        ASSERT(PropertySet[Index].Set);

        if (IsEqualGUIDAligned(&Property->Set, PropertySet[Index].Set))
        {
            for(ItemIndex = 0; ItemIndex < PropertySet[Index].PropertiesCount; ItemIndex++)
            {
                if (PropertySet[Index].PropertyItem[ItemIndex].PropertyId == Property->Id)
                {
                    if (PropertySet[Index].PropertyItem[ItemIndex].MinProperty > InputBufferLength)
                    {
                        /* too small input buffer */
                        IoStatus->Information = PropertySet[Index].PropertyItem[ItemIndex].MinProperty;
                        return STATUS_INVALID_PARAMETER;
                    }

                    if (PropertySet[Index].PropertyItem[ItemIndex].MinData > OutputBufferLength)
                    {
                        /* too small output buffer */
                        IoStatus->Information = PropertySet[Index].PropertyItem[ItemIndex].MinData;
                        return STATUS_MORE_ENTRIES;
                    }

                    /* store property set */
                    *Set = (PKSPROPERTY_SET)&PropertySet[Index];
                    *PropertyItem = (PKSPROPERTY_ITEM)&PropertySet[Index].PropertyItem[ItemIndex];

                    if (Property->Flags & KSPROPERTY_TYPE_SET)
                    {
                        /* store property handler */
                        *PropertyHandler = PropertySet[Index].PropertyItem[ItemIndex].SetPropertyHandler;
                        return STATUS_SUCCESS;
                    }

                    if (Property->Flags & KSPROPERTY_TYPE_GET)
                    {
                        /* store property handler */
                        *PropertyHandler = PropertySet[Index].PropertyItem[ItemIndex].GetPropertyHandler;
                        return STATUS_SUCCESS;
                    }


                    if (Property->Flags & KSPROPERTY_TYPE_BASICSUPPORT)
                    {
                        PULONG Flags;
                        PKSPROPERTY_DESCRIPTION Description;

                        if (sizeof(ULONG) > OutputBufferLength)
                        {
                            /* too small buffer */
                            return STATUS_INVALID_PARAMETER;
                        }

                        /* get output buffer */
                        Flags = (PULONG)OutputBuffer;

                        /* clear flags */
                        *Flags = 0;

                        IoStatus->Information = sizeof(ULONG);

                        if (PropertySet[Index].PropertyItem[ItemIndex].SupportHandler)
                        {
                            /* use support handler from driver */
                            *PropertyHandler = PropertySet[Index].PropertyItem[ItemIndex].SupportHandler;
                            return STATUS_SUCCESS;
                        }

                        if (PropertySet[Index].PropertyItem[ItemIndex].GetSupported)
                            *Flags |= KSPROPERTY_TYPE_GET;

                        if (PropertySet[Index].PropertyItem[ItemIndex].SetSupported)
                            *Flags |= KSPROPERTY_TYPE_SET;

                        if (OutputBufferLength >= sizeof(KSPROPERTY_DESCRIPTION))
                        {
                            /* get output buffer */
                            Description = (PKSPROPERTY_DESCRIPTION)OutputBuffer;

                            /* store result */
                            Description->DescriptionSize = sizeof(KSPROPERTY_DESCRIPTION);
                            Description->PropTypeSet.Set = KSPROPTYPESETID_General;
                            Description->PropTypeSet.Id = 0;
                            Description->PropTypeSet.Flags = 0;
                            Description->MembersListCount = 0;
                            Description->Reserved = 0;

                            IoStatus->Information = sizeof(KSPROPERTY_DESCRIPTION);
                        }
                        return STATUS_SUCCESS;
                    }
                }
            }
        }
    }
    return STATUS_NOT_FOUND;
}
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