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_OPEN_INSTANCE Struct Reference
[NPF structures and definitions]

Contains the state of a running instance of the NPF driver. More...

#include <Packet.h>


Data Fields

PDEVICE_EXTENSION DeviceExtension
NDIS_HANDLE AdapterHandle
 NDIS idetifier of the adapter used by this instance.

UINT Medium
NDIS_HANDLE PacketPool
 Pool of NDIS_PACKET structures used to transfer the packets from and to the NIC driver.

PIRP OpenCloseIrp
KSPIN_LOCK RequestSpinLock
 SpinLock used to synchronize the OID requests.

LIST_ENTRY RequestList
 List of pending OID requests.

LIST_ENTRY ResetIrpList
 List of pending adapter reset requests.

INTERNAL_REQUEST Requests [MAX_REQUESTS]
 Array of structures that wrap every single OID request.

PMDL BufferMdl
 Pointer to a Memory descriptor list (MDL) that maps the circular buffer's memory.

PKEVENT ReadEvent
 Pointer to the event on which the read calls on this instance must wait.

HANDLE ReadEventHandle
 Handle of the event on which the read calls on this instance must wait.

UNICODE_STRING ReadEventName
PUCHAR bpfprogram
JIT_BPF_FilterFilter
UINT MinToCopy
LARGE_INTEGER TimeOut
int mode
 Working mode of the driver. See PacketSetMode() for details.

LARGE_INTEGER Nbytes
 Amount of bytes accepted by the filter when this instance is in statistical mode.

LARGE_INTEGER Npackets
 Number of packets accepted by the filter when this instance is in statistical mode.

NDIS_SPIN_LOCK CountersLock
 SpinLock that protects the statistical mode counters.

UINT Nwrites
UINT Multiple_Write_Counter
 Counts the number of times a single write has already physically repeated.

NDIS_EVENT WriteEvent
 Event used to synchronize the multiple write process.

NDIS_EVENT IOEvent
 Event used to synchronize I/O requests with the callback structure of NDIS.

NDIS_STATUS IOStatus
 Maintains the status of and OID request call, that will be passed to the application.

BOOLEAN Bound
HANDLE DumpFileHandle
 Handle of the file used in dump mode.

PFILE_OBJECT DumpFileObject
 Pointer to the object of the file used in dump mode.

PKTHREAD DumpThreadObject
 Pointer to the object of the thread used in dump mode.

HANDLE DumpThreadHandle
 Handle of the thread created by dump mode to asynchronously move the buffer to disk.

NDIS_EVENT DumpEvent
 Event used to synchronize the dump thread with the tap when the instance is in dump mode.

LARGE_INTEGER DumpOffset
 Current offset in the dump file.

UNICODE_STRING DumpFileName
 String containing the name of the dump file.

UINT MaxDumpBytes
UINT MaxDumpPacks
BOOLEAN DumpLimitReached
MEM_TYPE mem_ex
 Memory used by the TME virtual co-processor.

TME_CORE tme
 Data structure containing the virtualization of the TME co-processor.

NDIS_SPIN_LOCK MachineLock
 SpinLock that protects the mem_ex buffer.

UINT MaxFrameSize
CpuPrivateData CpuData [32]
 Pool of kernel buffer structures, one for each CPU.

ULONG ReaderSN
 Sequence number of the next packet to be read from the pool of kernel buffers.

ULONG WriterSN
ULONG Size
 Size of each kernel buffer contained in the CpuData field.

ULONG SkipProcessing


Detailed Description

Contains the state of a running instance of the NPF driver.

This is the most important structure of NPF: it is used by almost all the functions of the driver. An _OPEN_INSTANCE structure is associated with every user-level session, allowing concurrent access to the driver.

Definition at line 303 of file Packet.h.


Field Documentation

NDIS_HANDLE AdapterHandle
 

NDIS idetifier of the adapter used by this instance.

Definition at line 307 of file Packet.h.

Referenced by NPF_BufferedWrite(), NPF_Close(), NPF_IoControl(), NPF_Open(), NPF_OpenAdapterComplete(), NPF_tap(), NPF_UnbindAdapter(), and NPF_Write().

BOOLEAN Bound
 

Specifies if NPF is still bound to the adapter used by this instance. Bound can be FALSE if a Plug and Play adapter has been removed or disabled by the user.

Definition at line 346 of file Packet.h.

Referenced by NPF_BufferedWrite(), NPF_Close(), NPF_CloseAdapterComplete(), NPF_Open(), NPF_Read(), NPF_UnbindAdapter(), and NPF_Write().

PUCHAR bpfprogram
 

Pointer to the filtering pseudo-code associated with current instance of the driver. This code is used only in particular situations (for example when the packet received from the NIC driver is stored in two non-consecutive buffers. In normal situations the filtering routine created by the JIT compiler and pointed by the next field is used. See NPF driver internals manual for details on the filtering process.

Definition at line 324 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), NPF_Open(), and NPF_tap().

PMDL BufferMdl
 

Pointer to a Memory descriptor list (MDL) that maps the circular buffer's memory.

Definition at line 317 of file Packet.h.

NDIS_SPIN_LOCK CountersLock
 

SpinLock that protects the statistical mode counters.

Definition at line 339 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_Read(), and NPF_tap().

CpuPrivateData CpuData[32]
 

Pool of kernel buffer structures, one for each CPU.

Definition at line 367 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), NPF_Read(), NPF_tap(), and NPF_TransferDataComplete().

PDEVICE_EXTENSION DeviceExtension
 

Pointer to the _DEVICE_EXTENSION structure of the device on which the instance is bound.

Definition at line 305 of file Packet.h.

Referenced by NPF_Open().

NDIS_EVENT DumpEvent
 

Event used to synchronize the dump thread with the tap when the instance is in dump mode.

Definition at line 352 of file Packet.h.

Referenced by NPF_Close(), NPF_DumpThread(), NPF_Open(), NPF_tap(), NPF_TransferDataComplete(), and NPF_UnbindAdapter().

HANDLE DumpFileHandle
 

Handle of the file used in dump mode.

Definition at line 348 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseDumpFile(), NPF_IoControl(), NPF_Open(), NPF_OpenDumpFile(), NPF_Read(), NPF_StartDump(), and NPF_UnbindAdapter().

UNICODE_STRING DumpFileName
 

String containing the name of the dump file.

Definition at line 354 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_CloseDumpFile(), NPF_IoControl(), and NPF_Open().

PFILE_OBJECT DumpFileObject
 

Pointer to the object of the file used in dump mode.

Definition at line 349 of file Packet.h.

Referenced by NPF_CloseDumpFile(), NPF_OpenDumpFile(), NPF_SaveCurrentBuffer(), and NPF_StartDump().

BOOLEAN DumpLimitReached
 

TRUE if the maximum dimension of the dump file (MaxDumpBytes or MaxDumpPacks) is reached.

Definition at line 360 of file Packet.h.

Referenced by NPF_DumpThread(), NPF_IoControl(), NPF_Open(), NPF_SaveCurrentBuffer(), and NPF_tap().

LARGE_INTEGER DumpOffset
 

Current offset in the dump file.

Definition at line 353 of file Packet.h.

Referenced by NPF_CloseDumpFile(), NPF_DumpThread(), NPF_Read(), NPF_SaveCurrentBuffer(), and NPF_StartDump().

HANDLE DumpThreadHandle
 

Handle of the thread created by dump mode to asynchronously move the buffer to disk.

Definition at line 351 of file Packet.h.

Referenced by NPF_StartDump().

PKTHREAD DumpThreadObject
 

Pointer to the object of the thread used in dump mode.

Definition at line 350 of file Packet.h.

Referenced by NPF_Close(), and NPF_StartDump().

JIT_BPF_Filter* Filter
 

Pointer to the native filtering function created by the jitter. See BPF_jitter() for details.

Definition at line 329 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), and NPF_tap().

NDIS_EVENT IOEvent
 

Event used to synchronize I/O requests with the callback structure of NDIS.

Definition at line 344 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), NPF_Open(), NPF_RequestComplete(), and NPF_UnbindAdapter().

NDIS_STATUS IOStatus
 

Maintains the status of and OID request call, that will be passed to the application.

Definition at line 345 of file Packet.h.

Referenced by NPF_IoControl(), and NPF_RequestComplete().

NDIS_SPIN_LOCK MachineLock
 

SpinLock that protects the mem_ex buffer.

Definition at line 364 of file Packet.h.

Referenced by NPF_Open(), NPF_Read(), and NPF_tap().

UINT MaxDumpBytes
 

Maximum dimension in bytes of the dump file. If the dump file reaches this size it will be closed. A value of 0 means unlimited size.

Definition at line 355 of file Packet.h.

Referenced by NPF_IoControl(), and NPF_SaveCurrentBuffer().

UINT MaxDumpPacks
 

Maximum number of packets that will be saved in the dump file. If this number of packets is reached the dump will be closed. A value of 0 means unlimited number of packets.

Definition at line 357 of file Packet.h.

Referenced by NPF_IoControl(), and NPF_tap().

UINT MaxFrameSize
 

Maximum frame size that the underlying MAC acceptes. Used to perform a check on the size of the frames sent with NPF_Write() or NPF_BufferedWrite().

Definition at line 365 of file Packet.h.

Referenced by NPF_BufferedWrite(), NPF_Open(), NPF_OpenAdapterComplete(), NPF_RequestComplete(), and NPF_Write().

UINT Medium
 

Type of physical medium the underlying NDIS driver uses. See the documentation of NdisOpenAdapter in the MS DDK for details.

Definition at line 308 of file Packet.h.

Referenced by NPF_Open(), and NPF_StartDump().

MEM_TYPE mem_ex
 

Memory used by the TME virtual co-processor.

Definition at line 362 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), NPF_Open(), NPF_OpenAdapterComplete(), and NPF_tap().

UINT MinToCopy
 

Minimum amount of data in the circular buffer that unlocks a read. Set with the BIOCSMINTOCOPY IOCTL.

Definition at line 331 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_Read(), NPF_tap(), and NPF_TransferDataComplete().

int mode
 

Working mode of the driver. See PacketSetMode() for details.

Definition at line 336 of file Packet.h.

Referenced by NPF_Close(), NPF_IoControl(), NPF_Open(), NPF_Read(), NPF_tap(), NPF_TransferDataComplete(), and NPF_UnbindAdapter().

UINT Multiple_Write_Counter
 

Counts the number of times a single write has already physically repeated.

Definition at line 342 of file Packet.h.

Referenced by NPF_Open(), NPF_SendComplete(), and NPF_Write().

LARGE_INTEGER Nbytes
 

Amount of bytes accepted by the filter when this instance is in statistical mode.

Definition at line 337 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_Read(), and NPF_tap().

LARGE_INTEGER Npackets
 

Number of packets accepted by the filter when this instance is in statistical mode.

Definition at line 338 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_Read(), and NPF_tap().

UINT Nwrites
 

Number of times a single write must be physically repeated. See NPF driver internals manual for an explanation

Definition at line 340 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_SendComplete(), and NPF_Write().

PIRP OpenCloseIrp
 

Pointer used to store the open/close IRP requests and provide them to the callbacks of NDIS.

Definition at line 311 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_Open(), and NPF_OpenAdapterComplete().

NDIS_HANDLE PacketPool
 

Pool of NDIS_PACKET structures used to transfer the packets from and to the NIC driver.

Definition at line 310 of file Packet.h.

Referenced by NPF_BufferedWrite(), NPF_Close(), NPF_CloseAdapterComplete(), NPF_Open(), NPF_OpenAdapterComplete(), NPF_tap(), and NPF_Write().

ULONG ReaderSN
 

Sequence number of the next packet to be read from the pool of kernel buffers.

Definition at line 368 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), and NPF_Read().

PKEVENT ReadEvent
 

Pointer to the event on which the read calls on this instance must wait.

Definition at line 318 of file Packet.h.

Referenced by NPF_Close(), NPF_Open(), NPF_Read(), NPF_SaveCurrentBuffer(), NPF_tap(), NPF_TransferDataComplete(), and NPF_UnbindAdapter().

HANDLE ReadEventHandle
 

Handle of the event on which the read calls on this instance must wait.

Definition at line 319 of file Packet.h.

Referenced by NPF_Close(), NPF_Open(), NPF_OpenAdapterComplete(), and NPF_UnbindAdapter().

UNICODE_STRING ReadEventName
 

Name of the event on which the read calls on this instance must wait. The event is created with a name, so it can be used at user level to know when it is possible to access the driver without being blocked. This fiels stores the name that and is used by the BIOCGEVNAME IOCTL call.

Definition at line 320 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_IoControl(), NPF_Open(), and NPF_OpenAdapterComplete().

LIST_ENTRY RequestList
 

List of pending OID requests.

Definition at line 314 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_OpenAdapterComplete(), and NPF_RequestComplete().

INTERNAL_REQUEST Requests[MAX_REQUESTS]
 

Array of structures that wrap every single OID request.

Definition at line 316 of file Packet.h.

Referenced by NPF_Open().

KSPIN_LOCK RequestSpinLock
 

SpinLock used to synchronize the OID requests.

Definition at line 313 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_OpenAdapterComplete(), NPF_RequestComplete(), and NPF_ResetComplete().

LIST_ENTRY ResetIrpList
 

List of pending adapter reset requests.

Definition at line 315 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), and NPF_ResetComplete().

ULONG Size
 

Size of each kernel buffer contained in the CpuData field.

Definition at line 371 of file Packet.h.

Referenced by NPF_Close(), NPF_CloseAdapterComplete(), NPF_DumpThread(), NPF_IoControl(), NPF_Open(), NPF_Read(), NPF_tap(), and NPF_TransferDataComplete().

ULONG SkipProcessing
 

Flag. When set to 1, the tap discards each packet. It is set to 1 by the IOCTLs that modify some "sensible" fields of the Open structure (e.g. they reallocate the pool of kernel buffers, or change the filter program

Definition at line 372 of file Packet.h.

Referenced by NPF_IoControl(), and NPF_tap().

LARGE_INTEGER TimeOut
 

Timeout after which a read is released, also if the amount of data in the buffer is less than MinToCopy. Set with the BIOCSRTIMEOUT IOCTL.

Definition at line 333 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), and NPF_Read().

TME_CORE tme
 

Data structure containing the virtualization of the TME co-processor.

Definition at line 363 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_Read(), and NPF_tap().

NDIS_EVENT WriteEvent
 

Event used to synchronize the multiple write process.

Definition at line 343 of file Packet.h.

Referenced by NPF_Open(), NPF_SendComplete(), and NPF_Write().

ULONG WriterSN
 

Sequence number of the next packet to be written in the pool of kernel buffers. These two sequence numbers are unique for each capture instance.

Definition at line 369 of file Packet.h.

Referenced by NPF_IoControl(), NPF_Open(), NPF_tap(), and NPF_TransferDataComplete().


The documentation for this struct was generated from the following file:

documentation. Copyright (c)2002-2003 Politecnico di Torino.
2005 translated by Telebusiness,Inc.
 All rights reserved.