// Copyright (C) 2024-2026 Internet Systems Consortium, Inc. ("ISC")

//

// This Source Code Form is subject to the terms of the Mozilla Public

// License, v. 2.0. If a copy of the MPL was not distributed with this

// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include <config.h>

#include <cc/command_interpreter.h>

#include <cc/user_context.h>

#include <dhcp6/ctrl_dhcp6_srv.h>

#include <dhcp6/json_config_parser.h>

#include <dhcp6/parser_context.h>

#include <util/filesystem.h>

#include <cassert>

#include <iostream>

#include <string>

#include <fuzz.h>

using namespace isc;

using namespace isc::config;

using namespace isc::data;

using namespace isc::dhcp;

using namespace isc::process;

using namespace std;

namespace {

static pid_t const PID(getpid());

static string const PID_STR(to_string(PID));

static string const KEA_DHCP6_CONF(KEA_FUZZ_DIR() + "/kea-dhcp6-" + PID_STR + ".conf");

}  // namespace

extern "C" {

int

LLVMFuzzerInitialize() {

    static bool initialized(DoInitialization());

    assert(initialized);

    return 0;

}

int

LLVMFuzzerTearDown() {

    try {

        remove(KEA_DHCP6_CONF.c_str());

    } catch (...) {

    }

    return 0;

}

int

LLVMFuzzerTestOneInput(uint8_t const* data, size_t size) {

    // Upper bound on oversized inputs: 512KiB. Last reported timeout was on 853KB.

    if (size > 524288) {

        std::cout << "Skipping: input size > 512KiB: " << size << std::endl;

        return 0;

    }

    // Create the config file.

    string const string_config(reinterpret_cast<char const*>(data), size);

    writeToFile(KEA_DHCP6_CONF, string_config);

    // Configure the server.

    ControlledDhcpv6Srv server;

    try {

        server.init(KEA_DHCP6_CONF);

    } catch (BadValue const&) {

    } catch (Dhcp6ParseError const&) {

    } catch (std::exception const&) {

    }

    return 0;

}

}  // extern "C"