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/* Copyright (C) 2007-2010 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
*/
#ifndef __DETECT_BYTEEXTRACT_H__
#define __DETECT_BYTEEXTRACT_H__
/* flags */
#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
/* endian value to be used. Would be stored in DetectByteParseData->endian */
#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
/**
* \brief Holds data related to byte_extract keyword.
*/
typedef struct DetectByteExtractData_ {
/* local id used by other keywords in the sig to reference this */
uint8_t local_id;
uint8_t nbytes;
int16_t pad;
int32_t offset;
const char *name;
uint8_t flags;
uint8_t endian;
uint8_t base;
uint8_t align_value;
uint16_t multiplier_value;
/* unique id used to reference this byte_extract keyword */
uint16_t id;
} DetectByteExtractData;
void DetectByteExtractRegister(void);
int DetectByteExtractSetup(DetectEngineCtx *, Signature *, char *);
void DetectByteExtractFree(void *);
int DetectByteExtractMatch(ThreadVars *, DetectEngineThreadCtx *,
Packet *, Signature *, SigMatch *);
SigMatch *DetectByteExtractRetrieveSMVar(const char *, Signature *);
int DetectByteExtractDoMatch(DetectEngineThreadCtx *, SigMatch *, Signature *,
uint8_t *, uint16_t, uint64_t *, uint8_t);
#endif /* __DETECT_BYTEEXTRACT_H__ */
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