fltmgrint.h File Reference

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Classes
struct	_FLT_OBJECT
struct	_ALLOCATE_CONTEXT_HEADER
struct	_FLT_RESOURCE_LIST_HEAD
struct	_FLT_MUTEX_LIST_HEAD
struct	_FLT_TYPE
struct	_FLTP_FRAME
struct	_FLT_FILTER
struct	_FLT_INSTANCE
struct	_TREE_ROOT
struct	_CONTEXT_LIST_CTRL
struct	_STREAM_LIST_CTRL
struct	_FLT_SERVER_PORT_OBJECT
struct	_FLT_MESSAGE_WAITER_QUEUE
struct	_FLT_PORT_OBJECT
struct	_CALLBACK_CTRL
struct	_NAME_CACHE_LIST_CTRL_STATS
struct	_NAME_CACHE_VOLUME_CTRL_STATS
struct	_NAME_CACHE_VOLUME_CTRL
struct	_FLT_VOLUME
struct	_MANAGER_CCB
struct	_FILTER_CCB
struct	_INSTANCE_CCB
struct	_VOLUME_CCB
struct	_PORT_CCB
union	_CCB_TYPE
struct	_FLT_CCB

Macros
#define	MAX_CONTEXT_TYPES   6

Typedefs
typedef enum _FLT_OBJECT_FLAGS	FLT_OBJECT_FLAGS
typedef enum _FLT_OBJECT_FLAGS *	PFLT_OBJECT_FLAGS
typedef enum _FLT_FILTER_FLAGS	FLT_FILTER_FLAGS
typedef enum _FLT_FILTER_FLAGS *	PFLT_FILTER_FLAGS
typedef struct _FLT_OBJECT	FLT_OBJECT
typedef struct _FLT_OBJECT *	PFLT_OBJECT
typedef struct _ALLOCATE_CONTEXT_HEADER	ALLOCATE_CONTEXT_HEADER
typedef struct _ALLOCATE_CONTEXT_HEADER *	PALLOCATE_CONTEXT_HEADER
typedef struct _FLT_RESOURCE_LIST_HEAD	FLT_RESOURCE_LIST_HEAD
typedef struct _FLT_RESOURCE_LIST_HEAD *	PFLT_RESOURCE_LIST_HEAD
typedef struct _FLT_MUTEX_LIST_HEAD	FLT_MUTEX_LIST_HEAD
typedef struct _FLT_MUTEX_LIST_HEAD *	PFLT_MUTEX_LIST_HEAD
typedef struct _FLT_TYPE	FLT_TYPE
typedef struct _FLT_TYPE *	PFLT_TYPE
typedef struct _FLTP_FRAME	FLTP_FRAME
typedef struct _FLTP_FRAME *	PFLTP_FRAME
typedef struct _FLT_FILTER	FLT_FILTER
typedef struct _FLT_FILTER *	PFLT_FILTER
typedef enum _FLT_INSTANCE_FLAGS	FLT_INSTANCE_FLAGS
typedef enum _FLT_INSTANCE_FLAGS *	PFLT_INSTANCE_FLAGS
typedef struct _FLT_INSTANCE	FLT_INSTANCE
typedef struct _FLT_INSTANCE *	PFLT_INSTANCE
typedef struct _TREE_ROOT	TREE_ROOT
typedef struct _TREE_ROOT *	PTREE_ROOT
typedef struct _CONTEXT_LIST_CTRL	CONTEXT_LIST_CTRL
typedef struct _CONTEXT_LIST_CTRL *	PCONTEXT_LIST_CTRL
typedef struct _STREAM_LIST_CTRL	STREAM_LIST_CTRL
typedef struct _STREAM_LIST_CTRL *	PSTREAM_LIST_CTRL
typedef struct _FLT_SERVER_PORT_OBJECT	FLT_SERVER_PORT_OBJECT
typedef struct _FLT_SERVER_PORT_OBJECT *	PFLT_SERVER_PORT_OBJECT
typedef struct _FLT_MESSAGE_WAITER_QUEUE	FLT_MESSAGE_WAITER_QUEUE
typedef struct _FLT_MESSAGE_WAITER_QUEUE *	PFLT_MESSAGE_WAITER_QUEUE
typedef struct _FLT_PORT_OBJECT	FLT_PORT_OBJECT
typedef struct _FLT_PORT_OBJECT *	PFLT_PORT_OBJECT
typedef enum _FLT_VOLUME_FLAGS	FLT_VOLUME_FLAGS
typedef enum _FLT_VOLUME_FLAGS *	PFLT_VOLUME_FLAGS
typedef enum _CALLBACK_NODE_FLAGS	CALLBACK_NODE_FLAGS
typedef enum _CALLBACK_NODE_FLAGS *	PCALLBACK_NODE_FLAGS
typedef struct _CALLBACK_CTRL	CALLBACK_CTRL
typedef struct _CALLBACK_CTRL *	PCALLBACK_CTRL
typedef struct _NAME_CACHE_LIST_CTRL_STATS	NAME_CACHE_LIST_CTRL_STATS
typedef struct _NAME_CACHE_LIST_CTRL_STATS *	PNAME_CACHE_LIST_CTRL_STATS
typedef struct _NAME_CACHE_VOLUME_CTRL_STATS	NAME_CACHE_VOLUME_CTRL_STATS
typedef struct _NAME_CACHE_VOLUME_CTRL_STATS *	PNAME_CACHE_VOLUME_CTRL_STATS
typedef struct _NAME_CACHE_VOLUME_CTRL	NAME_CACHE_VOLUME_CTRL
typedef struct _NAME_CACHE_VOLUME_CTRL *	PNAME_CACHE_VOLUME_CTRL
typedef struct _FLT_VOLUME	FLT_VOLUME
typedef struct _FLT_VOLUME *	PFLT_VOLUME
typedef struct _MANAGER_CCB	MANAGER_CCB
typedef struct _MANAGER_CCB *	PMANAGER_CCB
typedef struct _FILTER_CCB	FILTER_CCB
typedef struct _FILTER_CCB *	PFILTER_CCB
typedef struct _INSTANCE_CCB	INSTANCE_CCB
typedef struct _INSTANCE_CCB *	PINSTANCE_CCB
typedef struct _VOLUME_CCB	VOLUME_CCB
typedef struct _VOLUME_CCB *	PVOLUME_CCB
typedef struct _PORT_CCB	PORT_CCB
typedef struct _PORT_CCB *	PPORT_CCB
typedef union _CCB_TYPE	CCB_TYPE
typedef union _CCB_TYPE *	PCCB_TYPE
typedef struct _FLT_CCB	FLT_CCB
typedef struct _FLT_CCB *	PFLT_CCB

Enumerations
enum	_FLT_OBJECT_FLAGS {   FLT_OBFL_DRAINING = 1 , FLT_OBFL_ZOMBIED = 2 , FLT_OBFL_TYPE_INSTANCE = 0x1000000 , FLT_OBFL_TYPE_FILTER = 0x2000000 ,   FLT_OBFL_TYPE_VOLUME = 0x4000000 }
enum	_FLT_FILTER_FLAGS { FLTFL_MANDATORY_UNLOAD_IN_PROGRESS = 1 , FLTFL_FILTERING_INITIATED = 2 }
enum	_FLT_INSTANCE_FLAGS { INSFL_CAN_BE_DETACHED = 0x01 , INSFL_DELETING = 0x02 , INSFL_INITING = 0x04 }
enum	_FLT_VOLUME_FLAGS {   VOLFL_NETWORK_FILESYSTEM = 0x1 , VOLFL_PENDING_MOUNT_SETUP_NOTIFIES = 0x2 , VOLFL_MOUNT_SETUP_NOTIFIES_CALLED = 0x4 , VOLFL_MOUNTING = 0x8 ,   VOLFL_SENT_SHUTDOWN_IRP = 0x10 , VOLFL_ENABLE_NAME_CACHING = 0x20 , VOLFL_FILTER_EVER_ATTACHED = 0x40 , VOLFL_STANDARD_LINK_NOT_SUPPORTED = 0x80 }
enum	_CALLBACK_NODE_FLAGS { CBNFL_SKIP_PAGING_IO = 0x1 , CBNFL_SKIP_CACHED_IO = 0x2 , CBNFL_USE_NAME_CALLBACK_EX = 0x4 , CBNFL_SKIP_NON_DASD_IO = 0x8 }

Functions
VOID	FltpExInitializeRundownProtection (_Out_ PEX_RUNDOWN_REF RundownRef)
BOOLEAN	FltpExAcquireRundownProtection (_Inout_ PEX_RUNDOWN_REF RundownRef)
BOOLEAN	FltpExReleaseRundownProtection (_Inout_ PEX_RUNDOWN_REF RundownRef)
NTSTATUS NTAPI	FltpObjectRundownWait (_Inout_ PEX_RUNDOWN_REF RundownRef)
BOOLEAN	FltpExRundownCompleted (_Inout_ PEX_RUNDOWN_REF RundownRef)
NTSTATUS	FltpGetBaseDeviceObjectName (_In_ PDEVICE_OBJECT DeviceObject, _Inout_ PUNICODE_STRING ObjectName)
NTSTATUS	FltpGetObjectName (_In_ PVOID Object, _Inout_ PUNICODE_STRING ObjectName)
ULONG	FltpObjectPointerReference (_In_ PFLT_OBJECT Object)
VOID	FltpObjectPointerDereference (_In_ PFLT_OBJECT Object)
NTSTATUS	FltpReallocateUnicodeString (_In_ PUNICODE_STRING String, _In_ SIZE_T NewLength, _In_ BOOLEAN CopyExisting)
VOID	FltpFreeUnicodeString (_In_ PUNICODE_STRING String)
NTSTATUS	FltpDeviceControlHandler (_In_ PDEVICE_OBJECT DeviceObject, _Inout_ PIRP Irp)
NTSTATUS	FltpDispatchHandler (_In_ PDEVICE_OBJECT DeviceObject, _Inout_ PIRP Irp)
NTSTATUS	FltpMsgCreate (_In_ PDEVICE_OBJECT DeviceObject, _Inout_ PIRP Irp)
NTSTATUS	FltpMsgDispatch (_In_ PDEVICE_OBJECT DeviceObject, _Inout_ PIRP Irp)
NTSTATUS	FltpSetupCommunicationObjects (_In_ PDRIVER_OBJECT DriverObject)

Macro Definition Documentation

MAX_CONTEXT_TYPES

#define MAX_CONTEXT_TYPES   6

Definition at line 5 of file fltmgrint.h.

Typedef Documentation

ALLOCATE_CONTEXT_HEADER

typedef struct _ALLOCATE_CONTEXT_HEADER ALLOCATE_CONTEXT_HEADER

CALLBACK_CTRL

typedef struct _CALLBACK_CTRL CALLBACK_CTRL

CALLBACK_NODE_FLAGS

typedef enum _CALLBACK_NODE_FLAGS CALLBACK_NODE_FLAGS

CCB_TYPE

typedef union _CCB_TYPE CCB_TYPE

CONTEXT_LIST_CTRL

typedef struct _CONTEXT_LIST_CTRL CONTEXT_LIST_CTRL

FILTER_CCB

typedef struct _FILTER_CCB FILTER_CCB

FLT_CCB

typedef struct _FLT_CCB FLT_CCB

FLT_FILTER

typedef struct _FLT_FILTER FLT_FILTER

FLT_FILTER_FLAGS

typedef enum _FLT_FILTER_FLAGS FLT_FILTER_FLAGS

FLT_INSTANCE

typedef struct _FLT_INSTANCE FLT_INSTANCE

FLT_INSTANCE_FLAGS

typedef enum _FLT_INSTANCE_FLAGS FLT_INSTANCE_FLAGS

FLT_MESSAGE_WAITER_QUEUE

typedef struct _FLT_MESSAGE_WAITER_QUEUE FLT_MESSAGE_WAITER_QUEUE

FLT_MUTEX_LIST_HEAD

typedef struct _FLT_MUTEX_LIST_HEAD FLT_MUTEX_LIST_HEAD

FLT_OBJECT

typedef struct _FLT_OBJECT FLT_OBJECT

FLT_OBJECT_FLAGS

typedef enum _FLT_OBJECT_FLAGS FLT_OBJECT_FLAGS

FLT_PORT_OBJECT

typedef struct _FLT_PORT_OBJECT FLT_PORT_OBJECT

FLT_RESOURCE_LIST_HEAD

typedef struct _FLT_RESOURCE_LIST_HEAD FLT_RESOURCE_LIST_HEAD

FLT_SERVER_PORT_OBJECT

typedef struct _FLT_SERVER_PORT_OBJECT FLT_SERVER_PORT_OBJECT

FLT_TYPE

typedef struct _FLT_TYPE FLT_TYPE

FLT_VOLUME

typedef struct _FLT_VOLUME FLT_VOLUME

FLT_VOLUME_FLAGS

typedef enum _FLT_VOLUME_FLAGS FLT_VOLUME_FLAGS

FLTP_FRAME

typedef struct _FLTP_FRAME FLTP_FRAME

INSTANCE_CCB

typedef struct _INSTANCE_CCB INSTANCE_CCB

MANAGER_CCB

typedef struct _MANAGER_CCB MANAGER_CCB

NAME_CACHE_LIST_CTRL_STATS

typedef struct _NAME_CACHE_LIST_CTRL_STATS NAME_CACHE_LIST_CTRL_STATS

NAME_CACHE_VOLUME_CTRL

typedef struct _NAME_CACHE_VOLUME_CTRL NAME_CACHE_VOLUME_CTRL

NAME_CACHE_VOLUME_CTRL_STATS

typedef struct _NAME_CACHE_VOLUME_CTRL_STATS NAME_CACHE_VOLUME_CTRL_STATS

PALLOCATE_CONTEXT_HEADER

typedef struct _ALLOCATE_CONTEXT_HEADER * PALLOCATE_CONTEXT_HEADER

PCALLBACK_CTRL

typedef struct _CALLBACK_CTRL * PCALLBACK_CTRL

PCALLBACK_NODE_FLAGS

typedef enum _CALLBACK_NODE_FLAGS * PCALLBACK_NODE_FLAGS

PCCB_TYPE

typedef union _CCB_TYPE * PCCB_TYPE

PCONTEXT_LIST_CTRL

typedef struct _CONTEXT_LIST_CTRL * PCONTEXT_LIST_CTRL

PFILTER_CCB

typedef struct _FILTER_CCB * PFILTER_CCB

PFLT_CCB

typedef struct _FLT_CCB * PFLT_CCB

PFLT_FILTER

typedef struct _FLT_FILTER * PFLT_FILTER

PFLT_FILTER_FLAGS

typedef enum _FLT_FILTER_FLAGS * PFLT_FILTER_FLAGS

PFLT_INSTANCE

typedef struct _FLT_INSTANCE * PFLT_INSTANCE

PFLT_INSTANCE_FLAGS

typedef enum _FLT_INSTANCE_FLAGS * PFLT_INSTANCE_FLAGS

PFLT_MESSAGE_WAITER_QUEUE

typedef struct _FLT_MESSAGE_WAITER_QUEUE * PFLT_MESSAGE_WAITER_QUEUE

PFLT_MUTEX_LIST_HEAD

typedef struct _FLT_MUTEX_LIST_HEAD * PFLT_MUTEX_LIST_HEAD

PFLT_OBJECT

typedef struct _FLT_OBJECT * PFLT_OBJECT

PFLT_OBJECT_FLAGS

typedef enum _FLT_OBJECT_FLAGS * PFLT_OBJECT_FLAGS

PFLT_PORT_OBJECT

typedef struct _FLT_PORT_OBJECT * PFLT_PORT_OBJECT

PFLT_RESOURCE_LIST_HEAD

typedef struct _FLT_RESOURCE_LIST_HEAD * PFLT_RESOURCE_LIST_HEAD

PFLT_SERVER_PORT_OBJECT

typedef struct _FLT_SERVER_PORT_OBJECT * PFLT_SERVER_PORT_OBJECT

PFLT_TYPE

typedef struct _FLT_TYPE * PFLT_TYPE

PFLT_VOLUME

typedef struct _FLT_VOLUME * PFLT_VOLUME

PFLT_VOLUME_FLAGS

typedef enum _FLT_VOLUME_FLAGS * PFLT_VOLUME_FLAGS

PFLTP_FRAME

typedef struct _FLTP_FRAME * PFLTP_FRAME

PINSTANCE_CCB

typedef struct _INSTANCE_CCB * PINSTANCE_CCB

PMANAGER_CCB

typedef struct _MANAGER_CCB * PMANAGER_CCB

PNAME_CACHE_LIST_CTRL_STATS

typedef struct _NAME_CACHE_LIST_CTRL_STATS * PNAME_CACHE_LIST_CTRL_STATS

PNAME_CACHE_VOLUME_CTRL

typedef struct _NAME_CACHE_VOLUME_CTRL * PNAME_CACHE_VOLUME_CTRL

PNAME_CACHE_VOLUME_CTRL_STATS

typedef struct _NAME_CACHE_VOLUME_CTRL_STATS * PNAME_CACHE_VOLUME_CTRL_STATS

PORT_CCB

typedef struct _PORT_CCB PORT_CCB

PPORT_CCB

typedef struct _PORT_CCB * PPORT_CCB

PSTREAM_LIST_CTRL

typedef struct _STREAM_LIST_CTRL * PSTREAM_LIST_CTRL

PTREE_ROOT

typedef struct _TREE_ROOT * PTREE_ROOT

PVOLUME_CCB

typedef struct _VOLUME_CCB * PVOLUME_CCB

STREAM_LIST_CTRL

typedef struct _STREAM_LIST_CTRL STREAM_LIST_CTRL

TREE_ROOT

typedef struct _TREE_ROOT TREE_ROOT

VOLUME_CCB

typedef struct _VOLUME_CCB VOLUME_CCB

Enumeration Type Documentation

_CALLBACK_NODE_FLAGS

enum _CALLBACK_NODE_FLAGS

Enumerator
CBNFL_SKIP_PAGING_IO
CBNFL_SKIP_CACHED_IO
CBNFL_USE_NAME_CALLBACK_EX
CBNFL_SKIP_NON_DASD_IO

Definition at line 243 of file fltmgrint.h.

{
    CBNFL_SKIP_PAGING_IO = 0x1,
    CBNFL_SKIP_CACHED_IO = 0x2,
    CBNFL_USE_NAME_CALLBACK_EX = 0x4,
    CBNFL_SKIP_NON_DASD_IO = 0x8
 
} CALLBACK_NODE_FLAGS, *PCALLBACK_NODE_FLAGS;

_FLT_FILTER_FLAGS

enum _FLT_FILTER_FLAGS

Enumerator
FLTFL_MANDATORY_UNLOAD_IN_PROGRESS
FLTFL_FILTERING_INITIATED

Definition at line 18 of file fltmgrint.h.

{
    FLTFL_MANDATORY_UNLOAD_IN_PROGRESS = 1,
    FLTFL_FILTERING_INITIATED = 2
 
} FLT_FILTER_FLAGS, *PFLT_FILTER_FLAGS;

_FLT_INSTANCE_FLAGS

enum _FLT_INSTANCE_FLAGS

Enumerator
INSFL_CAN_BE_DETACHED
INSFL_DELETING
INSFL_INITING

Definition at line 127 of file fltmgrint.h.

{
    INSFL_CAN_BE_DETACHED = 0x01,
    INSFL_DELETING = 0x02,
    INSFL_INITING = 0x04
 
} FLT_INSTANCE_FLAGS, *PFLT_INSTANCE_FLAGS;

_FLT_OBJECT_FLAGS

enum _FLT_OBJECT_FLAGS

Enumerator
FLT_OBFL_DRAINING
FLT_OBFL_ZOMBIED
FLT_OBFL_TYPE_INSTANCE
FLT_OBFL_TYPE_FILTER
FLT_OBFL_TYPE_VOLUME

Definition at line 8 of file fltmgrint.h.

{
    FLT_OBFL_DRAINING = 1,
    FLT_OBFL_ZOMBIED = 2,
    FLT_OBFL_TYPE_INSTANCE = 0x1000000,
    FLT_OBFL_TYPE_FILTER = 0x2000000,
    FLT_OBFL_TYPE_VOLUME = 0x4000000
 
} FLT_OBJECT_FLAGS, *PFLT_OBJECT_FLAGS;

_FLT_VOLUME_FLAGS

enum _FLT_VOLUME_FLAGS

Enumerator
VOLFL_NETWORK_FILESYSTEM
VOLFL_PENDING_MOUNT_SETUP_NOTIFIES
VOLFL_MOUNT_SETUP_NOTIFIES_CALLED
VOLFL_MOUNTING
VOLFL_SENT_SHUTDOWN_IRP
VOLFL_ENABLE_NAME_CACHING
VOLFL_FILTER_EVER_ATTACHED
VOLFL_STANDARD_LINK_NOT_SUPPORTED

Definition at line 229 of file fltmgrint.h.

{
    VOLFL_NETWORK_FILESYSTEM = 0x1,
    VOLFL_PENDING_MOUNT_SETUP_NOTIFIES = 0x2,
    VOLFL_MOUNT_SETUP_NOTIFIES_CALLED = 0x4,
    VOLFL_MOUNTING = 0x8,
    VOLFL_SENT_SHUTDOWN_IRP = 0x10,
    VOLFL_ENABLE_NAME_CACHING = 0x20,
    VOLFL_FILTER_EVER_ATTACHED = 0x40,
    VOLFL_STANDARD_LINK_NOT_SUPPORTED = 0x80
 
} FLT_VOLUME_FLAGS, *PFLT_VOLUME_FLAGS;

Function Documentation

FltpDeviceControlHandler()

NTSTATUS FltpDeviceControlHandler	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_Inout_ PIRP	Irp
	)

Definition at line 37 of file Dispatch.c.

{
    PIO_STACK_LOCATION StackPtr;
    ULONG ControlCode;
    NTSTATUS Status;
 
    StackPtr = IoGetCurrentIrpStackLocation(Irp);
    FLT_ASSERT(StackPtr->MajorFunction == IRP_MJ_DEVICE_CONTROL);
 
    ControlCode = StackPtr->Parameters.DeviceIoControl.IoControlCode;
    switch (ControlCode)
    {
        case IOCTL_FILTER_LOAD:
            Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
            break;
 
        case IOCTL_FILTER_UNLOAD:
            Status = HandleLoadUnloadIoctl(DeviceObject, Irp);
            break;
 
        case IOCTL_FILTER_CREATE:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_ATTATCH:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_DETATCH:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_SEND_MESSAGE:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_GET_MESSAGE:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_REPLY_MESSAGE:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_FIND_FIRST:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_FIND_NEXT:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        case IOCTL_FILTER_GET_INFO:
            Status = STATUS_NOT_SUPPORTED;
            break;
 
        default:
            Status = STATUS_INVALID_PARAMETER;
            break;
    }
 
    return Status;
}

Referenced by FltpDeviceControl().

FltpDispatchHandler()

NTSTATUS FltpDispatchHandler	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_Inout_ PIRP	Irp
	)

Definition at line 103 of file Dispatch.c.

{
    PIO_STACK_LOCATION StackPtr;
    StackPtr = IoGetCurrentIrpStackLocation(Irp);
    UNREFERENCED_PARAMETER(StackPtr);
 
    // implement me
 
    return STATUS_SUCCESS;
}

Referenced by FltpDispatch().

FltpExAcquireRundownProtection()

BOOLEAN FltpExAcquireRundownProtection

(

_Inout_ PEX_RUNDOWN_REF

RundownRef

)

Definition at line 218 of file Object.c.

{
    return ExAcquireRundownProtection(RundownRef);
}

Referenced by FltObjectReference().

FltpExInitializeRundownProtection()

VOID FltpExInitializeRundownProtection

(

_Out_ PEX_RUNDOWN_REF

RundownRef

)

Definition at line 212 of file Object.c.

{
    ExInitializeRundownProtection(RundownRef);
}

FltpExReleaseRundownProtection()

BOOLEAN FltpExReleaseRundownProtection

(

_Inout_ PEX_RUNDOWN_REF

RundownRef

)

Definition at line 224 of file Object.c.

{
    ExReleaseRundownProtection(RundownRef);
    return TRUE;
}

Referenced by FltObjectDereference().

FltpExRundownCompleted()

BOOLEAN FltpExRundownCompleted

(

_Inout_ PEX_RUNDOWN_REF

RundownRef

)

Definition at line 231 of file Object.c.

{
    return _InterlockedExchange((PLONG)RundownRef, 1);
}

FltpFreeUnicodeString()

VOID FltpFreeUnicodeString

(

_In_ PUNICODE_STRING

String

)

Definition at line 24 of file Lib.c.

{
    /* Free up any existing buffer */
    if (String->Buffer)
    {
        ExFreePoolWithTag(String->Buffer, FM_TAG_UNICODE_STRING);
    }
 
    /* Empty the string */
    String->Buffer = NULL;
    String->Length = 0;
    String->MaximumLength = 0;
}

FltpGetBaseDeviceObjectName()

NTSTATUS FltpGetBaseDeviceObjectName	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_Inout_ PUNICODE_STRING	ObjectName
	)

Definition at line 245 of file Object.c.

{
    PDEVICE_OBJECT BaseDeviceObject;
    NTSTATUS Status;
 
    /*
    * Get the lowest device object on the stack, which may be the
    * object we were passed, and lookup the name for that object
    */
    BaseDeviceObject = IoGetDeviceAttachmentBaseRef(DeviceObject);
    Status = FltpGetObjectName(BaseDeviceObject, ObjectName);
    ObDereferenceObject(BaseDeviceObject);
 
    return Status;
}

FltpGetObjectName()

NTSTATUS FltpGetObjectName	(	_In_ PVOID	Object,
		_Inout_ PUNICODE_STRING	ObjectName
	)

Definition at line 263 of file Object.c.

{
    OBJECT_NAME_INFORMATION LocalNameInfo;
    POBJECT_NAME_INFORMATION ObjectNameInfo = &LocalNameInfo;
    ULONG ReturnLength;
    NTSTATUS Status;
 
    if (ObjectName == NULL)
        return STATUS_INVALID_PARAMETER;
 
    /* Get the size of the buffer required to hold the nameinfo */
    Status = ObQueryNameString(Object,
                               &LocalNameInfo,
                               sizeof(LocalNameInfo),
                               &ReturnLength);
    if (Status == STATUS_INFO_LENGTH_MISMATCH)
    {
        ObjectNameInfo = ExAllocatePoolWithTag(PagedPool,
                                               ReturnLength,
                                               FM_TAG_UNICODE_STRING);
        if (ObjectNameInfo == NULL) return STATUS_INSUFFICIENT_RESOURCES;
 
        /* Get the actual name info now we have the buffer to hold it */
        Status = ObQueryNameString(Object,
                                   ObjectNameInfo,
                                   ReturnLength,
                                   &ReturnLength);
    }
 
 
    if (NT_SUCCESS(Status))
    {
        /* Make sure the buffer we were passed is large enough to hold the string */
        if (ObjectName->MaximumLength < ObjectNameInfo->Name.Length)
        {
            /* It wasn't, let's enlarge the buffer */
            Status = FltpReallocateUnicodeString(ObjectName,
                                                 ObjectNameInfo->Name.Length,
                                                 FALSE);
 
        }
 
        if (NT_SUCCESS(Status))
        {
            /* Copy the object name into the callers buffer */
            RtlCopyUnicodeString(ObjectName, &ObjectNameInfo->Name);
        }
    }
 
    if (ObjectNameInfo != &LocalNameInfo)
    {
        ExFreePoolWithTag(ObjectNameInfo, FM_TAG_UNICODE_STRING);
    }
 
    return Status;
}

Referenced by FltpGetBaseDeviceObjectName().

FltpMsgCreate()

NTSTATUS FltpMsgCreate	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_Inout_ PIRP	Irp
	)

Definition at line 223 of file Messaging.c.

{
    PIO_STACK_LOCATION StackPtr;
    NTSTATUS Status;
 
    /* Get the stack location */
    StackPtr = IoGetCurrentIrpStackLocation(Irp);
 
    FLT_ASSERT(StackPtr->MajorFunction == IRP_MJ_CREATE);
 
    /* Check if this is a caller wanting to connect */
    if (StackPtr->MajorFunction == IRP_MJ_CREATE)
    {
        /* Create the client port for this connection and exit */
        Status = CreateClientPort(StackPtr->FileObject, Irp);
    }
    else
    {
        Status = STATUS_INVALID_PARAMETER;
    }
 
    if (Status != STATUS_PENDING)
    {
        Irp->IoStatus.Status = Status;
        Irp->IoStatus.Information = 0;
        IoCompleteRequest(Irp, 0);
    }
 
    return Status;
}

Referenced by FltpCreate().

FltpMsgDispatch()

NTSTATUS FltpMsgDispatch	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_Inout_ PIRP	Irp
	)

Definition at line 256 of file Messaging.c.

{
    PIO_STACK_LOCATION StackPtr;
    NTSTATUS Status;
 
    /* Get the stack location */
    StackPtr = IoGetCurrentIrpStackLocation(Irp);
 
    /* Check if this is a caller wanting to connect */
    if (StackPtr->MajorFunction == IRP_MJ_CLOSE)
    {
        /* Create the client port for this connection and exit */
        Status = CloseClientPort(StackPtr->FileObject, Irp);
    }
    else
    {
        // We don't support anything else yet
        Status = STATUS_NOT_IMPLEMENTED;
    }
 
    if (Status != STATUS_PENDING)
    {
        Irp->IoStatus.Status = Status;
        Irp->IoStatus.Information = 0;
        IoCompleteRequest(Irp, 0);
    }
 
    return Status;
}

Referenced by FltpDispatch().

FltpObjectPointerDereference()

VOID FltpObjectPointerDereference

(

_In_ PFLT_OBJECT

Object

)

Definition at line 335 of file Object.c.

{
    if (InterlockedDecrementSizeT(&Object->PointerCount) == 0)
    {
        // Cleanup
        FLT_ASSERT(FALSE);
    }
}

Referenced by FltpServerPortDelete().

FltpObjectPointerReference()

ULONG FltpObjectPointerReference

(

_In_ PFLT_OBJECT

Object

)

Definition at line 322 of file Object.c.

{
    PULONG Result;
 
    /* Store the old count and increment */
    Result = &Object->PointerCount;
    InterlockedIncrementSizeT(&Object->PointerCount);
 
    /* Return the initial value */
    return *Result;
}

Referenced by _IRQL_requires_max_().

FltpObjectRundownWait()

NTSTATUS NTAPI FltpObjectRundownWait

(

_Inout_ PEX_RUNDOWN_REF

RundownRef

)

Definition at line 238 of file Object.c.

{
    //return FltpExWaitForRundownProtectionRelease(RundownRef);
    return 0;
}

FltpReallocateUnicodeString()

NTSTATUS FltpReallocateUnicodeString	(	_In_ PUNICODE_STRING	String,
		_In_ SIZE_T	NewLength,
		_In_ BOOLEAN	CopyExisting
	)

Definition at line 39 of file Lib.c.

{
    PWCH NewBuffer;
 
    /* Don't bother reallocating if the buffer is smaller */
    if (NewLength <= String->MaximumLength)
    {
        String->Length = 0;
        return STATUS_SUCCESS;
    }
 
    /* Allocate a new buffer at the size requested */
    NewBuffer = ExAllocatePoolWithTag(PagedPool, NewLength, FM_TAG_UNICODE_STRING);
    if (NewBuffer == NULL) return STATUS_INSUFFICIENT_RESOURCES;
 
    if (CopyExisting)
    {
        /* Copy the old data across */
        RtlCopyMemory(NewBuffer, String->Buffer, String->Length);
    }
    else
    {
        /* Reset the length */
        String->Length = 0;
    }
 
    /* Free any old buffer */
    if (String->Buffer)
        ExFreePoolWithTag(String->Buffer, FM_TAG_UNICODE_STRING);
 
    /* Update the lengths */
    String->Buffer = NewBuffer;
    String->MaximumLength = NewLength;
 
    return STATUS_SUCCESS;
}

FltpSetupCommunicationObjects()

NTSTATUS FltpSetupCommunicationObjects

(

_In_ PDRIVER_OBJECT

DriverObject

)

Definition at line 377 of file Messaging.c.

{
    OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
    UNICODE_STRING SymLinkName;
    UNICODE_STRING Name;
    NTSTATUS Status;
 
    GENERIC_MAPPING Mapping =
    {
        STANDARD_RIGHTS_READ,
        STANDARD_RIGHTS_WRITE,
        STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE,
        FLT_PORT_ALL_ACCESS
    };
 
    /* Create the server comms object type */
    RtlZeroMemory(&ObjectTypeInitializer, sizeof(OBJECT_TYPE_INITIALIZER));
    RtlInitUnicodeString(&Name, L"FilterConnectionPort");
    ObjectTypeInitializer.Length = sizeof(OBJECT_TYPE_INITIALIZER);
    ObjectTypeInitializer.InvalidAttributes = OBJ_OPENLINK;
    ObjectTypeInitializer.GenericMapping = Mapping;
    ObjectTypeInitializer.PoolType = NonPagedPool;
    ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(FLT_SERVER_PORT_OBJECT);
    ObjectTypeInitializer.ValidAccessMask = GENERIC_ALL;
    ObjectTypeInitializer.CloseProcedure = FltpServerPortClose;
    ObjectTypeInitializer.DeleteProcedure = FltpServerPortDelete;
    Status = ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ServerPortObjectType);
    if (!NT_SUCCESS(Status)) return Status;
 
    /* Create the client comms object type */
    RtlZeroMemory(&ObjectTypeInitializer, sizeof(OBJECT_TYPE_INITIALIZER));
    RtlInitUnicodeString(&Name, L"FilterCommunicationPort");
    ObjectTypeInitializer.Length = sizeof(OBJECT_TYPE_INITIALIZER);
    ObjectTypeInitializer.InvalidAttributes = OBJ_OPENLINK;
    ObjectTypeInitializer.GenericMapping = Mapping;
    ObjectTypeInitializer.PoolType = NonPagedPool;
    ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(FLT_PORT_OBJECT);
    ObjectTypeInitializer.ValidAccessMask = GENERIC_ALL;
    ObjectTypeInitializer.CloseProcedure = FltpClientPortClose;
    ObjectTypeInitializer.DeleteProcedure = FltpClientPortDelete;
    Status = ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ClientPortObjectType);
    if (!NT_SUCCESS(Status))
    {
        goto Quit;
    }
 
    /* Create the device object */
    Status = IoCreateDevice(DriverObject,
                            0,
                            &CommsDeviceName,
                            FILE_DEVICE_WPD,
                            0,
                            0,
                            &CommsDeviceObject);
    if (NT_SUCCESS(Status))
    {
        /* Setup a symbolic link for the device */
        RtlInitUnicodeString(&SymLinkName, L"\\DosDevices\\FltMgrMsg");
        Status = IoCreateSymbolicLink(&SymLinkName, &CommsDeviceName);
    }
 
Quit:
    if (!NT_SUCCESS(Status))
    {
        /* Something went wrong, undo */
        if (CommsDeviceObject)
        {
            IoDeleteDevice(CommsDeviceObject);
            CommsDeviceObject = NULL;
        }
        if (ClientPortObjectType)
        {
            ObMakeTemporaryObject(ClientPortObjectType);
            ObDereferenceObject(ClientPortObjectType);
            ClientPortObjectType = NULL;
        }
 
        if (ServerPortObjectType)
        {
            ObMakeTemporaryObject(ServerPortObjectType);
            ObDereferenceObject(ServerPortObjectType);
            ServerPortObjectType = NULL;
        }
    }
 
    return Status;
}

Referenced by CODE_SEG().