detect-engine-sigorder.c File Reference

#include "suricata-common.h"
#include "detect.h"
#include "detect-xbits.h"
#include "detect-flowbits.h"
#include "detect-flowint.h"
#include "detect-parse.h"
#include "detect-engine-sigorder.h"
#include "detect-pcre.h"
#include "detect-engine-build.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "util-debug.h"
#include "util-action.h"
#include "action-globals.h"
#include "flow-util.h"

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Macros
#define	DETECT_FLOWVAR_NOT_USED   1
#define	DETECT_FLOWVAR_TYPE_READ   2
#define	DETECT_FLOWVAR_TYPE_SET_READ   3
#define	DETECT_FLOWVAR_TYPE_SET   4
#define	DETECT_PKTVAR_NOT_USED   1
#define	DETECT_PKTVAR_TYPE_READ   2
#define	DETECT_PKTVAR_TYPE_SET_READ   3
#define	DETECT_PKTVAR_TYPE_SET   4
#define	DETECT_FLOWBITS_NOT_USED   1
#define	DETECT_FLOWBITS_TYPE_READ   2
#define	DETECT_FLOWBITS_TYPE_SET_READ   3
#define	DETECT_FLOWBITS_TYPE_SET   4
#define	DETECT_FLOWINT_NOT_USED   1
#define	DETECT_FLOWINT_TYPE_READ   2
#define	DETECT_FLOWINT_TYPE_SET_READ   3
#define	DETECT_FLOWINT_TYPE_SET   4
#define	DETECT_XBITS_NOT_USED   1
#define	DETECT_XBITS_TYPE_READ   2
#define	DETECT_XBITS_TYPE_SET_READ   3
#define	DETECT_XBITS_TYPE_SET   4

Functions
void	SCSigOrderSignatures (DetectEngineCtx *de_ctx)
	Orders the signatures. More...
void	SCSigRegisterSignatureOrderingFuncs (DetectEngineCtx *de_ctx)
	Lets you register the Signature ordering functions. The order in which the functions are registered shows the priority. The first function registered provides more priority than the function registered after it. To add a new registration function, register it by listing it in the correct position in the below sequence, based on the priority you would want to offer to that keyword. More...
void	SCSigSignatureOrderingModuleCleanup (DetectEngineCtx *de_ctx)
	De-registers all the signature ordering functions registered. More...
DetectEngineCtx *	DetectEngineCtxInit (void)
Signature *	SigInit (DetectEngineCtx *, const char *)
	Parses a signature and adds it to the Detection Engine Context. More...
void	SigFree (DetectEngineCtx *, Signature *)
void	DetectEngineCtxFree (DetectEngineCtx *)
	Free a DetectEngineCtx:: More...
void	SCSigRegisterSignatureOrderingTests (void)

Detailed Description

Author

Anoop Saldanha anoop.nosp@m.sald.nosp@m.anha@.nosp@m.gmai.nosp@m.l.com

Signature ordering part of the detection engine.

Definition in file detect-engine-sigorder.c.

Macro Definition Documentation

DETECT_FLOWBITS_NOT_USED

#define DETECT_FLOWBITS_NOT_USED   1

Definition at line 54 of file detect-engine-sigorder.c.

DETECT_FLOWBITS_TYPE_READ

#define DETECT_FLOWBITS_TYPE_READ   2

Definition at line 55 of file detect-engine-sigorder.c.

DETECT_FLOWBITS_TYPE_SET

#define DETECT_FLOWBITS_TYPE_SET   4

Definition at line 57 of file detect-engine-sigorder.c.

DETECT_FLOWBITS_TYPE_SET_READ

#define DETECT_FLOWBITS_TYPE_SET_READ   3

Definition at line 56 of file detect-engine-sigorder.c.

DETECT_FLOWINT_NOT_USED

#define DETECT_FLOWINT_NOT_USED   1

Definition at line 59 of file detect-engine-sigorder.c.

DETECT_FLOWINT_TYPE_READ

#define DETECT_FLOWINT_TYPE_READ   2

Definition at line 60 of file detect-engine-sigorder.c.

DETECT_FLOWINT_TYPE_SET

#define DETECT_FLOWINT_TYPE_SET   4

Definition at line 62 of file detect-engine-sigorder.c.

DETECT_FLOWINT_TYPE_SET_READ

#define DETECT_FLOWINT_TYPE_SET_READ   3

Definition at line 61 of file detect-engine-sigorder.c.

DETECT_FLOWVAR_NOT_USED

#define DETECT_FLOWVAR_NOT_USED   1

Definition at line 44 of file detect-engine-sigorder.c.

DETECT_FLOWVAR_TYPE_READ

#define DETECT_FLOWVAR_TYPE_READ   2

Definition at line 45 of file detect-engine-sigorder.c.

DETECT_FLOWVAR_TYPE_SET

#define DETECT_FLOWVAR_TYPE_SET   4

Definition at line 47 of file detect-engine-sigorder.c.

DETECT_FLOWVAR_TYPE_SET_READ

#define DETECT_FLOWVAR_TYPE_SET_READ   3

Definition at line 46 of file detect-engine-sigorder.c.

DETECT_PKTVAR_NOT_USED

#define DETECT_PKTVAR_NOT_USED   1

Definition at line 49 of file detect-engine-sigorder.c.

DETECT_PKTVAR_TYPE_READ

#define DETECT_PKTVAR_TYPE_READ   2

Definition at line 50 of file detect-engine-sigorder.c.

DETECT_PKTVAR_TYPE_SET

#define DETECT_PKTVAR_TYPE_SET   4

Definition at line 52 of file detect-engine-sigorder.c.

DETECT_PKTVAR_TYPE_SET_READ

#define DETECT_PKTVAR_TYPE_SET_READ   3

Definition at line 51 of file detect-engine-sigorder.c.

DETECT_XBITS_NOT_USED

#define DETECT_XBITS_NOT_USED   1

Definition at line 64 of file detect-engine-sigorder.c.

DETECT_XBITS_TYPE_READ

#define DETECT_XBITS_TYPE_READ   2

Definition at line 65 of file detect-engine-sigorder.c.

DETECT_XBITS_TYPE_SET

#define DETECT_XBITS_TYPE_SET   4

Definition at line 67 of file detect-engine-sigorder.c.

DETECT_XBITS_TYPE_SET_READ

#define DETECT_XBITS_TYPE_SET_READ   3

Definition at line 66 of file detect-engine-sigorder.c.

Function Documentation

DetectEngineCtxFree()

void DetectEngineCtxFree

(

DetectEngineCtx *

de_ctx

)

Free a DetectEngineCtx::

Parameters

de_ctx

DetectEngineCtx:: to be freed

Definition at line 2445 of file detect-engine.c.

Referenced by UTHGenericTest(), UTHPacketMatchSig(), UTHPacketMatchSigMpm(), and UTHParseSignature().

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DetectEngineCtxInit()

DetectEngineCtx* DetectEngineCtxInit

(

void

)

Definition at line 2406 of file detect-engine.c.

Referenced by UTHGenericTest(), UTHPacketMatchSig(), UTHPacketMatchSigMpm(), and UTHParseSignature().

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SCSigOrderSignatures()

void SCSigOrderSignatures

(

DetectEngineCtx *

de_ctx

)

Orders the signatures.

Parameters

de_ctx

Pointer to the Detection Engine Context that holds the signatures to be ordered

Definition at line 729 of file detect-engine-sigorder.c.

References de_ctx, SCLogDebug, and DetectEngineCtx_::sig_list.

Referenced by UTHMatchPackets().

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SCSigRegisterSignatureOrderingFuncs()

void SCSigRegisterSignatureOrderingFuncs

(

DetectEngineCtx *

de_ctx

)

Lets you register the Signature ordering functions. The order in which the functions are registered shows the priority. The first function registered provides more priority than the function registered after it. To add a new registration function, register it by listing it in the correct position in the below sequence, based on the priority you would want to offer to that keyword.

Parameters

de_ctx

Pointer to the detection engine context from which the signatures have to be ordered.

Definition at line 789 of file detect-engine-sigorder.c.

References SCLogDebug.

Referenced by UTHMatchPackets().

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SCSigRegisterSignatureOrderingTests()

void SCSigRegisterSignatureOrderingTests

(

void

)

Definition at line 2153 of file detect-engine-sigorder.c.

References UtRegisterTest().

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SCSigSignatureOrderingModuleCleanup()

void SCSigSignatureOrderingModuleCleanup

(

DetectEngineCtx *

de_ctx

)

De-registers all the signature ordering functions registered.

Parameters

de_ctx

Pointer to the detection engine context from which the signatures were ordered.

Definition at line 809 of file detect-engine-sigorder.c.

References de_ctx, SCSigOrderFunc_::next, DetectEngineCtx_::sc_sig_order_funcs, and SCFree.

Referenced by DetectEngineCtxFree(), and UTHMatchPackets().

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SigFree()

void SigFree	(	DetectEngineCtx *	,
		Signature *
	)

Definition at line 1389 of file detect-parse.c.

Referenced by SigCleanSignatures().

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SigInit()

Signature* SigInit	(	DetectEngineCtx *	de_ctx,
		const char *	sigstr
	)

Parses a signature and adds it to the Detection Engine Context.

Parameters

de_ctx	Pointer to the Detection Engine Context.
sigstr	Pointer to a character string containing the signature to be parsed.

Return values

Pointer

to the Signature instance on success; NULL on failure.

Definition at line 2116 of file detect-parse.c.

Referenced by UTHPacketMatchSig(), and UTHPacketMatchSigMpm().

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