/*

  * Copyright (c) 2025, Net-snmp authors

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  * * Redistributions of source code must retain the above copyright notice, this

  *   list of conditions and the following disclaimer.

  *

  * * Redistributions in binary form must reproduce the above copyright notice,

  *   this list of conditions and the following disclaimer in the documentation

  *   and/or other materials provided with the distribution.

  *

  * * Neither the name of the copyright holder nor the names of its

  *   contributors may be used to endorse or promote products derived from

  *   this software without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

#include <net-snmp/net-snmp-config.h>

#include <net-snmp/net-snmp-includes.h>

#include <net-snmp/library/snmp_parse_args.h>

#include <libgen.h>

#include <limits.h>

#include "ada_fuzz_header.h"

int

LLVMFuzzerInitialize(int *argc, char ***argv)

{

    char path[PATH_MAX];

    char mibdirs[PATH_MAX];

    char *dir;

    if (getenv("NETSNMP_DEBUGGING") != NULL) {

        snmp_enable_stderrlog();

        snmp_set_do_debugging(1);

        debug_register_tokens("");

    }

    strlcpy(path, (*argv)[0], sizeof(path));

    dir = dirname(path);

    snprintf(mibdirs, sizeof(mibdirs), "%s/../../mibs", dir);

    netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_MIBDIRS,

                          mibdirs);

    return 0;

}

static void

dummy_opt_proc(int argc, char *const *argv, int opt)

{

}

int

LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)

{

    af_gb_init();

    int argc = (af_get_short(&data, &size) % 99) + 1;

    char **argv = malloc(argc * sizeof(*argv));

    for (int i = 0; i < argc; i++) {

        argv[i] = af_gb_get_null_terminated(&data, &size);

        if (!argv[i])

            goto free_argv;

    }

#if 0

    snmp_set_do_debugging(1);

    debug_register_tokens("snmp_parse_args");

#endif

    netsnmp_session *ss = SNMP_MALLOC_TYPEDEF(netsnmp_session);

    snmp_parse_args(argc, argv, ss, "", dummy_opt_proc);

    snmp_close(ss);

    netsnmp_cleanup_session(ss);

    free(ss);

free_argv:

    free(argv);

    af_gb_cleanup();

    return 0;

}