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Data Structures
struct	DetectByteExtractData_
	Holds data related to byte_extract keyword. More...

Macros
#define	DETECT_BYTE_EXTRACT_FLAG_RELATIVE 0x01

#define	DETECT_BYTE_EXTRACT_FLAG_MULTIPLIER 0x02

#define	DETECT_BYTE_EXTRACT_FLAG_STRING 0x04

#define	DETECT_BYTE_EXTRACT_FLAG_ALIGN 0x08

#define	DETECT_BYTE_EXTRACT_FLAG_ENDIAN 0x10

#define	DETECT_BYTE_EXTRACT_ENDIAN_NONE 0

#define	DETECT_BYTE_EXTRACT_ENDIAN_BIG 1

#define	DETECT_BYTE_EXTRACT_ENDIAN_LITTLE 2

#define	DETECT_BYTE_EXTRACT_ENDIAN_DCE 3

Typedefs
typedef struct DetectByteExtractData_	DetectByteExtractData
	Holds data related to byte_extract keyword. More...

Functions
void	DetectByteExtractRegister (void)
	Registers the keyword handlers for the "byte_extract" keyword. More...

SigMatch *	DetectByteExtractRetrieveSMVar (const char , const Signature )
	Lookup the SigMatch for a named byte_extract variable. More...

int	DetectByteExtractDoMatch (DetectEngineThreadCtx , const SigMatchData , const Signature , const uint8_t , uint32_t, uint64_t *, uint8_t)

Detailed Description

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

Definition in file detect-byte-extract.h.

Macro Definition Documentation

◆ DETECT_BYTE_EXTRACT_ENDIAN_BIG

#define DETECT_BYTE_EXTRACT_ENDIAN_BIG 1

Definition at line 37 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_ENDIAN_DCE

#define DETECT_BYTE_EXTRACT_ENDIAN_DCE 3

Definition at line 39 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_ENDIAN_LITTLE

#define DETECT_BYTE_EXTRACT_ENDIAN_LITTLE 2

Definition at line 38 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_ENDIAN_NONE

#define DETECT_BYTE_EXTRACT_ENDIAN_NONE 0

Definition at line 36 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_FLAG_ALIGN

#define DETECT_BYTE_EXTRACT_FLAG_ALIGN 0x08

Definition at line 32 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_FLAG_ENDIAN

#define DETECT_BYTE_EXTRACT_FLAG_ENDIAN 0x10

Definition at line 33 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_FLAG_MULTIPLIER

#define DETECT_BYTE_EXTRACT_FLAG_MULTIPLIER 0x02

Definition at line 30 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_FLAG_RELATIVE

#define DETECT_BYTE_EXTRACT_FLAG_RELATIVE 0x01

Definition at line 29 of file detect-byte-extract.h.

◆ DETECT_BYTE_EXTRACT_FLAG_STRING

#define DETECT_BYTE_EXTRACT_FLAG_STRING 0x04

Definition at line 31 of file detect-byte-extract.h.

Typedef Documentation

◆ DetectByteExtractData

typedef struct DetectByteExtractData_ DetectByteExtractData

Holds data related to byte_extract keyword.

Function Documentation

◆ DetectByteExtractDoMatch()

int DetectByteExtractDoMatch	(	DetectEngineThreadCtx *	,
		const SigMatchData *	,
		const Signature *	,
		const uint8_t *	,
		uint32_t	,
		uint64_t *	,
		uint8_t
	)

Definition at line 115 of file detect-byte-extract.c.

References DetectByteExtractData_::align_value, DetectByteExtractData_::base, DetectEngineThreadCtx_::buffer_offset, BYTE_BIG_ENDIAN, BYTE_LITTLE_ENDIAN, ByteExtractStringUint64(), ByteExtractUint64(), SigMatchData_::ctx, DETECT_BYTE_EXTRACT_ENDIAN_BIG, DETECT_BYTE_EXTRACT_FLAG_ALIGN, DETECT_BYTE_EXTRACT_FLAG_RELATIVE, DETECT_BYTE_EXTRACT_FLAG_STRING, DetectByteExtractData_::flags, len, DetectByteExtractData_::multiplier_value, DetectByteExtractData_::nbytes, DetectByteExtractData_::offset, payload_len, and SCLogDebug.

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◆ DetectByteExtractRegister()

void DetectByteExtractRegister ( void )

Registers the keyword handlers for the "byte_extract" keyword.

Definition at line 101 of file detect-byte-extract.c.

References SigTableElmt_::desc, DETECT_BYTE_EXTRACT, SigTableElmt_::Match, SigTableElmt_::name, SigTableElmt_::Setup, sigmatch_table, and SigTableElmt_::url.

Referenced by SigTableSetup().

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◆ DetectByteExtractRetrieveSMVar()

SigMatch* DetectByteExtractRetrieveSMVar	(	const char *	arg,
		const Signature *	s
	)

Lookup the SigMatch for a named byte_extract variable.

Parameters

arg	The name of the byte_extract variable to lookup.
s	Pointer the signature to look in.

Return values

A	pointer to the SigMatch if found, otherwise NULL.

Definition at line 659 of file detect-byte-extract.c.

References SignatureInitData_::buffer_index, SignatureInitData_::buffers, SigMatch_::ctx, DETECT_BYTE_EXTRACT, SignatureInitDataBuffer_::head, Signature_::init_data, DetectByteExtractData_::name, SigMatch_::next, and SigMatch_::type.

Referenced by DetectByteRetrieveSMVar().