#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"
#include "util-validate.h"

Include dependency graph for detect-engine-sigorder.c:

Data Structures
struct	SCSigSignatureWrapper_
	Signature wrapper used by signature ordering module while ordering signatures. More...

struct	SCSigOrderFunc_
	Structure holding the signature ordering function used by the signature ordering module. More...

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

Typedefs
typedef struct SCSigSignatureWrapper_	SCSigSignatureWrapper
	Signature wrapper used by signature ordering module while ordering signatures. More...

typedef struct SCSigOrderFunc_	SCSigOrderFunc
	Structure holding the signature ordering function used by the signature ordering module. More...

Enumerations
enum	DetectSigorderUserDataType { DETECT_SIGORDER_FLOWBITS, DETECT_SIGORDER_FLOWVAR, DETECT_SIGORDER_PKTVAR, DETECT_SIGORDER_FLOWINT, DETECT_SIGORDER_HOSTBITS, DETECT_SIGORDER_IPPAIRBITS, DETECT_SIGORDER_MAX }
	Different kinds of helper data that can be used by the signature ordering module. Used by the "user" field in SCSigSignatureWrapper. More...

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 *	DetectEngineAppendSig (DetectEngineCtx , const char )
	Parse and append a Signature into the Detection Engine Context signature list. 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 55 of file detect-engine-sigorder.c.

◆ DETECT_FLOWBITS_TYPE_READ

#define DETECT_FLOWBITS_TYPE_READ 2

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

◆ DETECT_FLOWBITS_TYPE_SET

#define DETECT_FLOWBITS_TYPE_SET 4

Definition at line 58 of file detect-engine-sigorder.c.

◆ DETECT_FLOWBITS_TYPE_SET_READ

#define DETECT_FLOWBITS_TYPE_SET_READ 3

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

◆ DETECT_FLOWINT_NOT_USED

#define DETECT_FLOWINT_NOT_USED 1

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

◆ DETECT_FLOWINT_TYPE_READ

#define DETECT_FLOWINT_TYPE_READ 2

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

◆ DETECT_FLOWINT_TYPE_SET

#define DETECT_FLOWINT_TYPE_SET 4

Definition at line 63 of file detect-engine-sigorder.c.

◆ DETECT_FLOWINT_TYPE_SET_READ

#define DETECT_FLOWINT_TYPE_SET_READ 3

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

◆ DETECT_FLOWVAR_NOT_USED

#define DETECT_FLOWVAR_NOT_USED 1

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

◆ DETECT_FLOWVAR_TYPE_READ

#define DETECT_FLOWVAR_TYPE_READ 2

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

◆ DETECT_FLOWVAR_TYPE_SET

#define DETECT_FLOWVAR_TYPE_SET 4

Definition at line 48 of file detect-engine-sigorder.c.

◆ DETECT_FLOWVAR_TYPE_SET_READ

#define DETECT_FLOWVAR_TYPE_SET_READ 3

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

◆ DETECT_PKTVAR_NOT_USED

#define DETECT_PKTVAR_NOT_USED 1

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

◆ DETECT_PKTVAR_TYPE_READ

#define DETECT_PKTVAR_TYPE_READ 2

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

◆ DETECT_PKTVAR_TYPE_SET

#define DETECT_PKTVAR_TYPE_SET 4

Definition at line 53 of file detect-engine-sigorder.c.

◆ DETECT_PKTVAR_TYPE_SET_READ

#define DETECT_PKTVAR_TYPE_SET_READ 3

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

◆ DETECT_XBITS_NOT_USED

#define DETECT_XBITS_NOT_USED 1

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

◆ DETECT_XBITS_TYPE_READ

#define DETECT_XBITS_TYPE_READ 2

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

◆ DETECT_XBITS_TYPE_SET

#define DETECT_XBITS_TYPE_SET 4

Definition at line 68 of file detect-engine-sigorder.c.

◆ DETECT_XBITS_TYPE_SET_READ

#define DETECT_XBITS_TYPE_SET_READ 3

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

Typedef Documentation

◆ SCSigOrderFunc

typedef struct SCSigOrderFunc_ SCSigOrderFunc

Structure holding the signature ordering function used by the signature ordering module.

◆ SCSigSignatureWrapper

typedef struct SCSigSignatureWrapper_ SCSigSignatureWrapper

Signature wrapper used by signature ordering module while ordering signatures.

Enumeration Type Documentation

◆ DetectSigorderUserDataType

enum DetectSigorderUserDataType

Different kinds of helper data that can be used by the signature ordering module. Used by the "user" field in SCSigSignatureWrapper.

Enumerator
DETECT_SIGORDER_FLOWBITS
DETECT_SIGORDER_FLOWVAR
DETECT_SIGORDER_PKTVAR
DETECT_SIGORDER_FLOWINT
DETECT_SIGORDER_HOSTBITS
DETECT_SIGORDER_IPPAIRBITS
DETECT_SIGORDER_MAX

Definition at line 73 of file detect-engine-sigorder.c.

Function Documentation

◆ DetectEngineAppendSig()

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

Parse and append a Signature into the Detection Engine Context signature list.

If the signature is bidirectional it should append two signatures (with the addresses switched) into the list. Also handle duplicate signatures. In case of duplicate sigs, use the ones that have the latest revision. We use the sid and the msg to identify duplicate sigs. If 2 sigs have the same sid and gid, they are duplicates.

Parameters

de_ctx	Pointer to the Detection Engine Context.
sigstr	Pointer to a character string containing the signature to be parsed.
sig_file	Pointer to a character string containing the filename from which signature is read
lineno	Line number from where signature is read

Return values

Pointer to the head Signature in the detection engine ctx sig_list on success; NULL on failure.

In DetectEngineAppendSig(), the signatures are prepended and we always return the first one so if the signature is bidirectional, the returned sig will point through "next" ptr to the cloned signatures with the switched addresses

Definition at line 3437 of file detect-parse.c.

Referenced by UTHAppendSigs(), and UTHParseSignature().

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◆ DetectEngineCtxFree()

void DetectEngineCtxFree ( DetectEngineCtx * de_ctx )

Free a DetectEngineCtx::

Parameters

de_ctx DetectEngineCtx:: to be freed

Definition at line 2641 of file detect-engine.c.

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

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◆ DetectEngineCtxInit()

DetectEngineCtx* DetectEngineCtxInit ( void )

Definition at line 2602 of file detect-engine.c.

Referenced by LLVMFuzzerTestOneInput(), 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 804 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 919 of file detect-engine-sigorder.c.

References SCLogDebug.

Referenced by UTHMatchPackets().

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◆ SCSigRegisterSignatureOrderingTests()

void SCSigRegisterSignatureOrderingTests ( void )

Definition at line 2087 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 939 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 2057 of file detect-parse.c.

Referenced by LLVMFuzzerTestOneInput(), and SigCleanSignatures().

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Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ DETECT_FLOWBITS_NOT_USED

◆ DETECT_FLOWBITS_TYPE_READ

◆ DETECT_FLOWBITS_TYPE_SET

◆ DETECT_FLOWBITS_TYPE_SET_READ

◆ DETECT_FLOWINT_NOT_USED

◆ DETECT_FLOWINT_TYPE_READ

◆ DETECT_FLOWINT_TYPE_SET

◆ DETECT_FLOWINT_TYPE_SET_READ

◆ DETECT_FLOWVAR_NOT_USED

◆ DETECT_FLOWVAR_TYPE_READ

◆ DETECT_FLOWVAR_TYPE_SET

◆ DETECT_FLOWVAR_TYPE_SET_READ

◆ DETECT_PKTVAR_NOT_USED

◆ DETECT_PKTVAR_TYPE_READ

◆ DETECT_PKTVAR_TYPE_SET

◆ DETECT_PKTVAR_TYPE_SET_READ

◆ DETECT_XBITS_NOT_USED

◆ DETECT_XBITS_TYPE_READ

◆ DETECT_XBITS_TYPE_SET

◆ DETECT_XBITS_TYPE_SET_READ

Typedef Documentation

◆ SCSigOrderFunc

◆ SCSigSignatureWrapper

Enumeration Type Documentation

◆ DetectSigorderUserDataType

Function Documentation

◆ DetectEngineAppendSig()

◆ DetectEngineCtxFree()

◆ DetectEngineCtxInit()

◆ SCSigOrderSignatures()

◆ SCSigRegisterSignatureOrderingFuncs()

◆ SCSigRegisterSignatureOrderingTests()

◆ SCSigSignatureOrderingModuleCleanup()

◆ SigFree()