source-erf-dag.c File Reference

#include "suricata-common.h"
#include "suricata.h"
#include "tm-threads.h"
#include "util-privs.h"
#include "util-datalink.h"
#include "util-device.h"
#include "tmqh-packetpool.h"
#include "source-erf-dag.h"
#include <dagapi.h>

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Data Structures
struct	ErfDagThreadVars_

Macros
#define	MINDATA   32768
#define	MAXWAIT   20000
#define	POLL_INTERVAL   1000;
#define	BYTES_PER_LOOP   (4 * 1024 * 1024) /* 4 MB */

Typedefs
typedef struct ErfDagThreadVars_	ErfDagThreadVars

Functions
TmEcode	ReceiveErfDagLoop (ThreadVars *tv, void *data, void *slot)
	Receives packets from a DAG interface. More...
TmEcode	ReceiveErfDagThreadInit (ThreadVars *tv, const void *initdata, void **data)
	Initialize the ERF receiver thread, generate a single ErfDagThreadVar structure for each thread, this will contain a DAG file descriptor which is read when the thread executes. More...
void	ReceiveErfDagThreadExitStats (ThreadVars *tv, void *data)
	Print some stats to the log at program exit. More...
TmEcode	ReceiveErfDagThreadDeinit (ThreadVars *tv, void *data)
	Deinitializes the DAG card. More...
TmEcode	DecodeErfDagThreadInit (ThreadVars *, const void *, void **)
TmEcode	DecodeErfDagThreadDeinit (ThreadVars *tv, void *data)
TmEcode	DecodeErfDag (ThreadVars *tv, Packet *p, void *data)
	This function passes off to link type decoders. More...
void	ReceiveErfDagCloseStream (int dagfd, int stream)
void	TmModuleReceiveErfDagRegister (void)
	Register the ERF file receiver (reader) module. More...
void	TmModuleDecodeErfDagRegister (void)
	Register the ERF file decoder module. More...

Variables
uint32_t	max_pending_packets

Detailed Description

Author

Endace Technology Limited.

Jason MacLulich jason.nosp@m..mac.nosp@m.lulic.nosp@m.h@en.nosp@m.dace..nosp@m.com

Support for reading ERF records from a DAG card.

Only ethernet supported at this time.

Definition in file source-erf-dag.c.

Macro Definition Documentation

BYTES_PER_LOOP

#define BYTES_PER_LOOP   (4 * 1024 * 1024) /* 4 MB */

Definition at line 91 of file source-erf-dag.c.

MAXWAIT

#define MAXWAIT   20000

Definition at line 85 of file source-erf-dag.c.

MINDATA

#define MINDATA   32768

Definition at line 82 of file source-erf-dag.c.

POLL_INTERVAL

#define POLL_INTERVAL   1000;

Definition at line 88 of file source-erf-dag.c.

Typedef Documentation

ErfDagThreadVars

typedef struct ErfDagThreadVars_ ErfDagThreadVars

Function Documentation

DecodeErfDag()

TmEcode DecodeErfDag	(	ThreadVars *	tv,
		Packet *	p,
		void *	data
	)

This function passes off to link type decoders.

Decode ErfDag DecodeErfDag decodes packets from DAG and passes them off to the proper link type decoder.

Parameters

t	pointer to ThreadVars
p	pointer to the current packet
data	pointer that gets cast into PcapThreadVars for ptv

Definition at line 588 of file source-erf-dag.c.

References BUG_ON, Packet_::datalink, DecodeEthernet(), DecodeUpdatePacketCounters(), dtv, GET_PKT_DATA, GET_PKT_LEN, LINKTYPE_ETHERNET, PacketDecodeFinalize(), PKT_IS_PSEUDOPKT, SCEnter, SCLogError, SCReturnInt, TM_ECODE_OK, and tv.

Referenced by TmModuleDecodeErfDagRegister().

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DecodeErfDagThreadDeinit()

TmEcode DecodeErfDagThreadDeinit	(	ThreadVars *	tv,
		void *	data
	)

Definition at line 632 of file source-erf-dag.c.

References DecodeThreadVarsFree(), SCReturnInt, TM_ECODE_OK, and tv.

Referenced by TmModuleDecodeErfDagRegister().

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DecodeErfDagThreadInit()

TmEcode DecodeErfDagThreadInit	(	ThreadVars *	tv,
		const void *	initdata,
		void **	data
	)

Definition at line 614 of file source-erf-dag.c.

References DecodeRegisterPerfCounters(), DecodeThreadVarsAlloc(), dtv, SCEnter, SCReturnInt, TM_ECODE_FAILED, TM_ECODE_OK, and tv.

Referenced by TmModuleDecodeErfDagRegister().

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ReceiveErfDagCloseStream()

void ReceiveErfDagCloseStream	(	int	dagfd,
		int	stream
	)

Definition at line 568 of file source-erf-dag.c.

Referenced by ReceiveErfDagThreadDeinit().

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ReceiveErfDagLoop()

TmEcode ReceiveErfDagLoop	(	ThreadVars *	tv,
		void *	data,
		void *	slot
	)

Receives packets from a DAG interface.

Parameters

tv	pointer to ThreadVars
data	pointer to ErfDagThreadVars
slot	slot containing task information

Return values

TM_ECODE_OK	on success
TM_ECODE_FAILED	on failure

Definition at line 311 of file source-erf-dag.c.

References dtv, SCEnter, SCReturnInt, TmSlot_::slot_next, suricata_ctl_flags, SURICATA_STOP, THV_RUNNING, TM_ECODE_OK, TmThreadsSetFlag(), and tv.

Referenced by TmModuleReceiveErfDagRegister().

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ReceiveErfDagThreadDeinit()

TmEcode ReceiveErfDagThreadDeinit	(	ThreadVars *	tv,
		void *	data
	)

Deinitializes the DAG card.

Parameters

tv	pointer to ThreadVars
data	pointer that gets cast into PcapThreadVars for ptv

Definition at line 556 of file source-erf-dag.c.

References ErfDagThreadVars_::dagfd, ErfDagThreadVars_::dagstream, ReceiveErfDagCloseStream(), SCEnter, SCReturnInt, and TM_ECODE_OK.

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ReceiveErfDagThreadExitStats()

void ReceiveErfDagThreadExitStats	(	ThreadVars *	tv,
		void *	data
	)

Print some stats to the log at program exit.

Parameters

tv	Pointer to ThreadVars.
data	Pointer to data, ErfFileThreadVars.

Definition at line 533 of file source-erf-dag.c.

References ErfDagThreadVars_::bytes, ErfDagThreadVars_::dagstream, ErfDagThreadVars_::drops, ErfDagThreadVars_::livedev, ErfDagThreadVars_::packets, SC_ATOMIC_SET, SCLogInfo, StatsGetLocalCounterValue(), and tv.

Referenced by TmModuleReceiveErfDagRegister().

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ReceiveErfDagThreadInit()

TmEcode ReceiveErfDagThreadInit	(	ThreadVars *	tv,
		const void *	initdata,
		void **	data
	)

Initialize the ERF receiver thread, generate a single ErfDagThreadVar structure for each thread, this will contain a DAG file descriptor which is read when the thread executes.

Parameters

tv	Thread variable to ThreadVars
initdata	Initial data to the interface passed from the user, this is processed by the user.

We assume that we have only a single name for the DAG interface.

Parameters

data	data pointer gets populated with

Definition at line 178 of file source-erf-dag.c.

References ErfDagThreadVars_::dagfd, ErfDagThreadVars_::dagname, ErfDagThreadVars_::dagstream, DatalinkSetGlobalType(), ErfDagThreadVars_::drops, FatalError, LINKTYPE_ETHERNET, ErfDagThreadVars_::livedev, LiveGetDevice(), MAXWAIT, MINDATA, ErfDagThreadVars_::packets, ErfDagThreadVars_::poll, POLL_INTERVAL, SCCalloc, SCEnter, SCFree, SCLogError, SCLogInfo, SCReturnInt, StatsRegisterCounter(), TM_ECODE_FAILED, TM_ECODE_OK, tv, ErfDagThreadVars_::tv, and unlikely.

Referenced by TmModuleReceiveErfDagRegister().

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TmModuleDecodeErfDagRegister()

void TmModuleDecodeErfDagRegister

(

void

)

Register the ERF file decoder module.

Definition at line 151 of file source-erf-dag.c.

References TmModule_::cap_flags, DecodeErfDag(), DecodeErfDagThreadDeinit(), DecodeErfDagThreadInit(), TmModule_::flags, TmModule_::Func, TmModule_::name, TmModule_::ThreadDeinit, TmModule_::ThreadExitPrintStats, TmModule_::ThreadInit, TM_FLAG_DECODE_TM, TMM_DECODEERFDAG, and tmm_modules.

Referenced by RegisterAllModules().

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TmModuleReceiveErfDagRegister()

void TmModuleReceiveErfDagRegister

(

void

)

Register the ERF file receiver (reader) module.

Definition at line 133 of file source-erf-dag.c.

References TmModule_::cap_flags, TmModule_::flags, TmModule_::Func, TmModule_::name, TmModule_::PktAcqBreakLoop, TmModule_::PktAcqLoop, ReceiveErfDagLoop(), ReceiveErfDagThreadExitStats(), ReceiveErfDagThreadInit(), TmModule_::ThreadDeinit, TmModule_::ThreadExitPrintStats, TmModule_::ThreadInit, TM_FLAG_RECEIVE_TM, tmm_modules, and TMM_RECEIVEERFDAG.

Referenced by RegisterAllModules().

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