/* Copyright (C) 2007-2026 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 Pablo Rincon <pablo.rincon.crespo@gmail.com>
 */

#ifndef SURICATA_DETECT_ISDATAAT_H
#define SURICATA_DETECT_ISDATAAT_H

#define ISDATAAT_RELATIVE   0x01
#define ISDATAAT_RAWBYTES   0x02
#define ISDATAAT_NEGATED    0x04
#define ISDATAAT_OFFSET_VAR 0x08

typedef struct DetectIsdataatData_ {
    uint16_t dataat;     /* data offset to match */
    uint8_t flags; /* isdataat options*/
} DetectIsdataatData;

enum DetectAbsentMode {
    DETECT_ABSENT_ONLY,        /**< match only on absent buffer */
    DETECT_ABSENT_OR_ELSE,     /**< match on absent buffer or fall through to next keywords */
    DETECT_ABSENT_ERROR_OR,    /**< match on transform error or fall through to next keywords */
    DETECT_ABSENT_MUST_ERROR,  /**< match only on transform error */
    DETECT_ABSENT_MUST_SUCCEED /**< reject on transform error, fall through to next keywords on
                                  success */
};

typedef struct DetectAbsentData_ {
    enum DetectAbsentMode mode;
} DetectAbsentData;

/* prototypes */
void DetectIsdataatRegister (void);

bool DetectAbsentValidateContentCallback(
        const DetectEngineCtx *de_ctx, const Signature *s, const SignatureInitDataBuffer *);

const char *DetectAbsentModeStr(enum DetectAbsentMode mode);

#endif /* SURICATA_DETECT_ISDATAAT_H */