/* Copyright (C) 2017 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 Giuseppe Longo <glongo@stamus-networks.com>

 *

 * Detection engine helper functions

 */

#include "suricata-common.h"

#include "suricata.h"

#include "detect.h"

#include "util-detect.h"

/**

 * \brief Allocate SigString list member

 *

 * \retval Pointer to SigString

 */

SigString *SigStringAlloc(void)

{

    SigString *sigstr = SCCalloc(1, sizeof(SigString));

    if (unlikely(sigstr == NULL))

        return NULL;

    sigstr->line = 0;

    return sigstr;

}

/**

 * \brief Assigns the filename, signature, lineno to SigString list member

 *

 * \param sig pointer to SigString

 * \param sig_file filename that contains the signature

 * \param sig_str signature in string format

 * \param sig_error signature parsing error

 * \param line line line number

 *

 * \retval 1 on success 0 on failure

 */

static int SigStringAddSig(SigString *sig, const char *sig_file,

                           const char *sig_str, const char *sig_error,

                           int line)

{

    if (sig_file == NULL || sig_str == NULL) {

        return 0;

    }

    sig->filename = SCStrdup(sig_file);

    if (sig->filename == NULL) {

        SCLogError("Error allocating memory");

        return 0;

    }

    sig->sig_str = SCStrdup(sig_str);

    if (sig->sig_str == NULL) {

        SCLogError("Error allocating memory");

        SCFree(sig->filename);

        return 0;

    }

    if (sig_error) {

        sig->sig_error = SCStrdup(sig_error);

        if (sig->sig_error == NULL) {

            SCLogError("Error allocating memory");

            SCFree(sig->filename);

            SCFree(sig->sig_str);

            return 0;

        }

    }

    sig->line = line;

    return 1;

}

/**

 * \brief Append a new list member to SigString list

 *

 * \param list pointer to the start of the SigString list

 * \param sig_file filename that contains the signature

 * \param sig_str signature in string format

 * \param line line line number

 *

 * \retval 1 on success 0 on failure

 */

int SigStringAppend(SigFileLoaderStat *sig_stats, const char *sig_file,

                    const char *sig_str, const char *sig_error, int line)

{

    SigString *item = SigStringAlloc();

    if (item == NULL) {

        return 0;

    }

    if (!SigStringAddSig(item, sig_file, sig_str, sig_error, line)) {

        SCFree(item);

        return 0;

    }

    TAILQ_INSERT_TAIL(&sig_stats->failed_sigs, item, next);

    return 1;

}