Packet.h File Reference

#include "win_bpf.h"

Go to the source code of this file.

Data Structures

struct packet_file_header

Header of a libpcap dump file. More...

struct sf_pkthdr

Header associated to a packet in the driver's buffer when the driver is in dump mode. Similar to the bpf_hdr structure, but simpler. More...

struct _PACKET_OID_DATA

Structure containing an OID request. More...

struct _INTERNAL_REQUEST

Stores an OID request. More...

struct _PACKET_RESERVED

Contains a NDIS packet. More...

struct _DEVICE_EXTENSION

Port device extension. More...

struct __CPU_Private_Data

Kernel buffer of each CPU. More...

struct _OPEN_INSTANCE

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

struct PacketHeader

Structure prepended to each packet in the kernel buffer pool. More...

Defines

#define MAX_REQUESTS   32

Maximum number of simultaneous IOCTL requests.

#define Packet_ALIGNMENT   sizeof(int)

Alignment macro. Defines the alignment size.

#define Packet_WORDALIGN(x)   (((x)+(Packet_ALIGNMENT-1))&~(Packet_ALIGNMENT-1))

even multiple of Packet_ALIGNMENT.

#define KERNEL_EVENT_NAMESPACE   L"\\BaseNamedObjects\\"

#define MODE_CAPT   0x0

Capture working mode.

#define MODE_STAT   0x1

Statistical working mode.

#define MODE_MON   0x2

Kernel monitoring mode.

#define MODE_DUMP   0x10

Kernel dump working mode.

#define IMMEDIATE   1

Immediate timeout. Forces a read call to return immediately.

#define NDIS_FLAGS_SKIP_LOOPBACK_W2K   0x400

This is an undocumented flag for NdisSetPacketFlags() that allows to disable loopback reception.

#define TCPDUMP_MAGIC   0xa1b2c3d4

Libpcap magic number. Used by programs like tcpdump to recognize a driver's generated dump file.

#define PCAP_VERSION_MAJOR   2

Major libpcap version of the dump file. Used by programs like tcpdump to recognize a driver's generated dump file.

#define PCAP_VERSION_MINOR   4

Minor libpcap version of the dump file. Used by programs like tcpdump to recognize a driver's generated dump file.

#define NPF_DISABLE_LOOPBACK   1

Tells the driver to drop the packets sent by itself. This is usefult when building applications like bridges.

#define NPF_ENABLE_LOOPBACK   2

Tells the driver to capture the packets sent by itself.

#define C_ASSERT(a)

#define RESERVED(_p)   ((PPACKET_RESERVED)((_p)->ProtocolReserved))

Macro to obtain a NDIS_PACKET from a PACKET_RESERVED.

#define TRANSMIT_PACKETS   256

of packets that can be transmitted at the same time or with a single call to NdisSendPackets.

#define EXIT_SUCCESS(quantity)

Macro used in the I/O routines to return the control to user-mode with a success status.

#define EXIT_FAILURE(quantity)

Macro used in the I/O routines to return the control to user-mode with a failure status.

Typedefs

typedef struct _PACKET_OID_DATA PACKET_OID_DATA

typedef struct _PACKET_OID_DATA * PPACKET_OID_DATA

typedef struct _INTERNAL_REQUEST INTERNAL_REQUEST

typedef struct _INTERNAL_REQUEST * PINTERNAL_REQUEST

typedef struct _PACKET_RESERVED PACKET_RESERVED

typedef struct _PACKET_RESERVED * PPACKET_RESERVED

typedef struct _DEVICE_EXTENSION DEVICE_EXTENSION

typedef struct _DEVICE_EXTENSION * PDEVICE_EXTENSION

typedef struct __CPU_Private_Data CpuPrivateData

typedef struct _OPEN_INSTANCE OPEN_INSTANCE

typedef struct _OPEN_INSTANCE * POPEN_INSTANCE

Enumerations

enum ADAPTER_BINDING_STATUS { ADAPTER_UNBOUND, ADAPTER_BOUND, ADAPTER_UNBINDING }

Functions

C_ASSERT (sizeof(PACKET_OID_DATA)==12)

NTSTATUS DriverEntry (IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath)

The initialization routine of the driver.

PWCHAR getAdaptersList (VOID)

Returns the list of the MACs available on the system.

PKEY_VALUE_PARTIAL_INFORMATION getTcpBindings (VOID)

Returns the MACs that bind to TCP/IP.

BOOLEAN NPF_CreateDevice (IN OUT PDRIVER_OBJECT adriverObjectP, IN PUNICODE_STRING amacNameP)

Creates a device for a given MAC.

NTSTATUS NPF_Open (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Opens a new instance of the driver.

VOID NPF_OpenAdapterComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status, IN NDIS_STATUS OpenErrorStatus)

Ends the opening of an adapter.

NTSTATUS NPF_Cleanup (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Closes an instance of the driver.

NTSTATUS NPF_Close (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

VOID NPF_CloseAdapterComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status)

Ends the closing of an adapter.

NDIS_STATUS NPF_tap (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_HANDLE MacReceiveContext, IN PVOID HeaderBuffer, IN UINT HeaderBufferSize, IN PVOID LookAheadBuffer, IN UINT LookaheadBufferSize, IN UINT PacketSize)

Callback invoked by NDIS when a packet arrives from the network.

VOID NPF_TransferDataComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_PACKET Packet, IN NDIS_STATUS Status, IN UINT BytesTransferred)

Ends the transfer of a packet.

VOID NPF_ReceiveComplete (IN NDIS_HANDLE ProtocolBindingContext)

Callback function that signals the end of a packet reception.

NTSTATUS NPF_IoControl (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Handles the IOCTL calls.

VOID NPF_RequestComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_REQUEST pRequest, IN NDIS_STATUS Status)

Ends an OID request.

NTSTATUS NPF_Write (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Writes a raw packet to the network.

INT NPF_BufferedWrite (IN PIRP Irp, IN PCHAR UserBuff, IN ULONG UserBuffSize, BOOLEAN sync)

Writes a buffer of raw packets to the network.

VOID NPF_WaitEndOfBufferedWrite (POPEN_INSTANCE Open)

Waits the completion of all the sends performed by NPF_BufferedWrite.

VOID NPF_SendComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_PACKET pPacket, IN NDIS_STATUS Status)

Ends a send operation.

VOID NPF_ResetComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status)

Ends a reset of the adapter.

VOID NPF_Status (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status, IN PVOID StatusBuffer, IN UINT StatusBufferSize)

Callback for NDIS StatusHandler. Not used by NPF.

VOID NPF_StatusComplete (IN NDIS_HANDLE ProtocolBindingContext)

Callback for NDIS StatusCompleteHandler. Not used by NPF.

VOID NPF_Unload (IN PDRIVER_OBJECT DriverObject)

Function called by the OS when NPF is unloaded.

NTSTATUS NPF_Read (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Function that serves the user's reads.

NTSTATUS NPF_ReadRegistry (IN PWSTR *MacDriverName, IN PWSTR *PacketDriverName, IN PUNICODE_STRING RegistryPath)

Reads the registry keys associated woth NPF if the driver is manually installed via the control panel.

NTSTATUS NPF_QueryRegistryRoutine (IN PWSTR ValueName, IN ULONG ValueType, IN PVOID ValueData, IN ULONG ValueLength, IN PVOID Context, IN PVOID EntryContext)

Function used by NPF_ReadRegistry() to quesry the registry keys associated woth NPF if the driver is manually installed via the control panel.

VOID NPF_BindAdapter (OUT PNDIS_STATUS Status, IN NDIS_HANDLE BindContext, IN PNDIS_STRING DeviceName, IN PVOID SystemSpecific1, IN PVOID SystemSpecific2)

Callback for NDIS BindAdapterHandler. Not used by NPF.

VOID NPF_UnbindAdapter (OUT PNDIS_STATUS Status, IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_HANDLE UnbindContext)

Callback for NDIS UnbindAdapterHandler.

NTSTATUS NPF_OpenDumpFile (POPEN_INSTANCE Open, PUNICODE_STRING fileName, BOOLEAN append)

Creates the file that will receive the packets when the driver is in dump mode.

NTSTATUS NPF_StartDump (POPEN_INSTANCE Open)

Starts dump to file.

VOID NPF_DumpThread (PVOID Open)

The dump thread.

NTSTATUS NPF_SaveCurrentBuffer (POPEN_INSTANCE Open)

Saves the content of the packet buffer to the file associated with current instance.

VOID NPF_WriteDumpFile (PFILE_OBJECT FileObject, PLARGE_INTEGER Offset, ULONG Length, PMDL Mdl, PIO_STATUS_BLOCK IoStatusBlock)

Writes a block of packets on the dump file.

NTSTATUS NPF_CloseDumpFile (POPEN_INSTANCE Open)

Closes the dump file associated with an instance of the driver.

VOID NPF_CloseOpenInstance (POPEN_INSTANCE pOpen)

BOOLEAN NPF_StartUsingBinding (IN POPEN_INSTANCE pOpen)

VOID NPF_StopUsingBinding (IN POPEN_INSTANCE pOpen)

VOID NPF_CloseBinding (IN POPEN_INSTANCE pOpen)

NTSTATUS NPF_GetDeviceMTU (IN POPEN_INSTANCE pOpen, IN PIRP pIrp, OUT PUINT pMtu)

UINT GetBuffOccupation (POPEN_INSTANCE Open)

Returns the amount of bytes present in the packet buffer.

Variables

ULONG g_NCpu

NDIS_HANDLE g_NdisProtocolHandle

struct time_conv G_Start_Time

UINT g_SendPacketFlags


Data Structures
struct	packet_file_header
	Header of a libpcap dump file. More...
struct	sf_pkthdr
	Header associated to a packet in the driver's buffer when the driver is in dump mode. Similar to the bpf_hdr structure, but simpler. More...
struct	_PACKET_OID_DATA
	Structure containing an OID request. More...
struct	_INTERNAL_REQUEST
	Stores an OID request. More...
struct	_PACKET_RESERVED
	Contains a NDIS packet. More...
struct	_DEVICE_EXTENSION
	Port device extension. More...
struct	__CPU_Private_Data
	Kernel buffer of each CPU. More...
struct	_OPEN_INSTANCE
	Contains the state of a running instance of the NPF driver. More...
struct	PacketHeader
	Structure prepended to each packet in the kernel buffer pool. More...
Defines
#define	MAX_REQUESTS 32
	Maximum number of simultaneous IOCTL requests.
#define	Packet_ALIGNMENT sizeof(int)
	Alignment macro. Defines the alignment size.
#define	Packet_WORDALIGN(x) (((x)+(Packet_ALIGNMENT-1))&~(Packet_ALIGNMENT-1))
	even multiple of Packet_ALIGNMENT.
#define	KERNEL_EVENT_NAMESPACE L"\\BaseNamedObjects\\"
#define	MODE_CAPT 0x0
	Capture working mode.
#define	MODE_STAT 0x1
	Statistical working mode.
#define	MODE_MON 0x2
	Kernel monitoring mode.
#define	MODE_DUMP 0x10
	Kernel dump working mode.
#define	IMMEDIATE 1
	Immediate timeout. Forces a read call to return immediately.
#define	NDIS_FLAGS_SKIP_LOOPBACK_W2K 0x400
	This is an undocumented flag for NdisSetPacketFlags() that allows to disable loopback reception.
#define	TCPDUMP_MAGIC 0xa1b2c3d4
	Libpcap magic number. Used by programs like tcpdump to recognize a driver's generated dump file.
#define	PCAP_VERSION_MAJOR 2
	Major libpcap version of the dump file. Used by programs like tcpdump to recognize a driver's generated dump file.
#define	PCAP_VERSION_MINOR 4
	Minor libpcap version of the dump file. Used by programs like tcpdump to recognize a driver's generated dump file.
#define	NPF_DISABLE_LOOPBACK 1
	Tells the driver to drop the packets sent by itself. This is usefult when building applications like bridges.
#define	NPF_ENABLE_LOOPBACK 2
	Tells the driver to capture the packets sent by itself.
#define	C_ASSERT(a)
#define	RESERVED(_p) ((PPACKET_RESERVED)((_p)->ProtocolReserved))
	Macro to obtain a NDIS_PACKET from a PACKET_RESERVED.
#define	TRANSMIT_PACKETS 256
	of packets that can be transmitted at the same time or with a single call to NdisSendPackets.
#define	EXIT_SUCCESS(quantity)
	Macro used in the I/O routines to return the control to user-mode with a success status.
#define	EXIT_FAILURE(quantity)
	Macro used in the I/O routines to return the control to user-mode with a failure status.
Typedefs
typedef struct _PACKET_OID_DATA	PACKET_OID_DATA
typedef struct _PACKET_OID_DATA *	PPACKET_OID_DATA
typedef struct _INTERNAL_REQUEST	INTERNAL_REQUEST
typedef struct _INTERNAL_REQUEST *	PINTERNAL_REQUEST
typedef struct _PACKET_RESERVED	PACKET_RESERVED
typedef struct _PACKET_RESERVED *	PPACKET_RESERVED
typedef struct _DEVICE_EXTENSION	DEVICE_EXTENSION
typedef struct _DEVICE_EXTENSION *	PDEVICE_EXTENSION
typedef struct __CPU_Private_Data	CpuPrivateData
typedef struct _OPEN_INSTANCE	OPEN_INSTANCE
typedef struct _OPEN_INSTANCE *	POPEN_INSTANCE
Enumerations
enum	ADAPTER_BINDING_STATUS { ADAPTER_UNBOUND, ADAPTER_BOUND, ADAPTER_UNBINDING }
Functions
	C_ASSERT (sizeof(PACKET_OID_DATA)==12)
NTSTATUS	DriverEntry (IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath)
	The initialization routine of the driver.
PWCHAR	getAdaptersList (VOID)
	Returns the list of the MACs available on the system.
PKEY_VALUE_PARTIAL_INFORMATION	getTcpBindings (VOID)
	Returns the MACs that bind to TCP/IP.
BOOLEAN	NPF_CreateDevice (IN OUT PDRIVER_OBJECT adriverObjectP, IN PUNICODE_STRING amacNameP)
	Creates a device for a given MAC.
NTSTATUS	NPF_Open (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
	Opens a new instance of the driver.
VOID	NPF_OpenAdapterComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status, IN NDIS_STATUS OpenErrorStatus)
	Ends the opening of an adapter.
NTSTATUS	NPF_Cleanup (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
	Closes an instance of the driver.
NTSTATUS	NPF_Close (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
VOID	NPF_CloseAdapterComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status)
	Ends the closing of an adapter.
NDIS_STATUS	NPF_tap (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_HANDLE MacReceiveContext, IN PVOID HeaderBuffer, IN UINT HeaderBufferSize, IN PVOID LookAheadBuffer, IN UINT LookaheadBufferSize, IN UINT PacketSize)
	Callback invoked by NDIS when a packet arrives from the network.
VOID	NPF_TransferDataComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_PACKET Packet, IN NDIS_STATUS Status, IN UINT BytesTransferred)
	Ends the transfer of a packet.
VOID	NPF_ReceiveComplete (IN NDIS_HANDLE ProtocolBindingContext)
	Callback function that signals the end of a packet reception.
NTSTATUS	NPF_IoControl (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
	Handles the IOCTL calls.
VOID	NPF_RequestComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_REQUEST pRequest, IN NDIS_STATUS Status)
	Ends an OID request.
NTSTATUS	NPF_Write (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
	Writes a raw packet to the network.
INT	NPF_BufferedWrite (IN PIRP Irp, IN PCHAR UserBuff, IN ULONG UserBuffSize, BOOLEAN sync)
	Writes a buffer of raw packets to the network.
VOID	NPF_WaitEndOfBufferedWrite (POPEN_INSTANCE Open)
	Waits the completion of all the sends performed by NPF_BufferedWrite.
VOID	NPF_SendComplete (IN NDIS_HANDLE ProtocolBindingContext, IN PNDIS_PACKET pPacket, IN NDIS_STATUS Status)
	Ends a send operation.
VOID	NPF_ResetComplete (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status)
	Ends a reset of the adapter.
VOID	NPF_Status (IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_STATUS Status, IN PVOID StatusBuffer, IN UINT StatusBufferSize)
	Callback for NDIS StatusHandler. Not used by NPF.
VOID	NPF_StatusComplete (IN NDIS_HANDLE ProtocolBindingContext)
	Callback for NDIS StatusCompleteHandler. Not used by NPF.
VOID	NPF_Unload (IN PDRIVER_OBJECT DriverObject)
	Function called by the OS when NPF is unloaded.
NTSTATUS	NPF_Read (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
	Function that serves the user's reads.
NTSTATUS	NPF_ReadRegistry (IN PWSTR MacDriverName, IN PWSTR PacketDriverName, IN PUNICODE_STRING RegistryPath)
	Reads the registry keys associated woth NPF if the driver is manually installed via the control panel.
NTSTATUS	NPF_QueryRegistryRoutine (IN PWSTR ValueName, IN ULONG ValueType, IN PVOID ValueData, IN ULONG ValueLength, IN PVOID Context, IN PVOID EntryContext)
	Function used by NPF_ReadRegistry() to quesry the registry keys associated woth NPF if the driver is manually installed via the control panel.
VOID	NPF_BindAdapter (OUT PNDIS_STATUS Status, IN NDIS_HANDLE BindContext, IN PNDIS_STRING DeviceName, IN PVOID SystemSpecific1, IN PVOID SystemSpecific2)
	Callback for NDIS BindAdapterHandler. Not used by NPF.
VOID	NPF_UnbindAdapter (OUT PNDIS_STATUS Status, IN NDIS_HANDLE ProtocolBindingContext, IN NDIS_HANDLE UnbindContext)
	Callback for NDIS UnbindAdapterHandler.
NTSTATUS	NPF_OpenDumpFile (POPEN_INSTANCE Open, PUNICODE_STRING fileName, BOOLEAN append)
	Creates the file that will receive the packets when the driver is in dump mode.
NTSTATUS	NPF_StartDump (POPEN_INSTANCE Open)
	Starts dump to file.
VOID	NPF_DumpThread (PVOID Open)
	The dump thread.
NTSTATUS	NPF_SaveCurrentBuffer (POPEN_INSTANCE Open)
	Saves the content of the packet buffer to the file associated with current instance.
VOID	NPF_WriteDumpFile (PFILE_OBJECT FileObject, PLARGE_INTEGER Offset, ULONG Length, PMDL Mdl, PIO_STATUS_BLOCK IoStatusBlock)
	Writes a block of packets on the dump file.
NTSTATUS	NPF_CloseDumpFile (POPEN_INSTANCE Open)
	Closes the dump file associated with an instance of the driver.
VOID	NPF_CloseOpenInstance (POPEN_INSTANCE pOpen)
BOOLEAN	NPF_StartUsingBinding (IN POPEN_INSTANCE pOpen)
VOID	NPF_StopUsingBinding (IN POPEN_INSTANCE pOpen)
VOID	NPF_CloseBinding (IN POPEN_INSTANCE pOpen)
NTSTATUS	NPF_GetDeviceMTU (IN POPEN_INSTANCE pOpen, IN PIRP pIrp, OUT PUINT pMtu)
UINT	GetBuffOccupation (POPEN_INSTANCE Open)
	Returns the amount of bytes present in the packet buffer.
Variables
ULONG	g_NCpu
NDIS_HANDLE	g_NdisProtocolHandle
struct time_conv	G_Start_Time
UINT	g_SendPacketFlags