option_data_parser.h

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// Copyright (C) 2017-2019,2021 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/.

#ifndef OPTION_DATA_PARSER_H
#define OPTION_DATA_PARSER_H

#include <cc/data.h>
#include <cc/simple_parser.h>
#include <dhcp/option_definition.h>
#include <dhcpsrv/cfg_option.h>
#include <dhcpsrv/cfg_option_def.h>
#include <util/optional.h>
#include <cstdint>
#include <string>
#include <utility>

namespace isc {
namespace dhcp {

class OptionDataParser : public isc::data::SimpleParser {
public:
    OptionDataParser(const uint16_t address_family,
                     CfgOptionDefPtr cfg_option_def = CfgOptionDefPtr());

    std::pair<OptionDescriptor, std::string>
    parse(isc::data::ConstElementPtr single_option);

private:

    template<typename SearchKey>
    OptionDefinitionPtr findOptionDefinition(const std::string& option_space,
                                             const SearchKey& search_key) const;

    std::pair<OptionDescriptor, std::string>
    createOption(isc::data::ConstElementPtr option_data);

    util::Optional<uint32_t>
    extractCode(data::ConstElementPtr parent) const;

    util::Optional<std::string>
    extractName(data::ConstElementPtr parent) const;

    util::Optional<bool> extractCSVFormat(data::ConstElementPtr parent) const;

    std::string extractData(data::ConstElementPtr parent) const;

    std::string extractSpace(data::ConstElementPtr parent) const;

    util::Optional<bool> extractPersistent(data::ConstElementPtr parent) const;

    uint16_t address_family_;

    CfgOptionDefPtr cfg_option_def_;
};

class OptionDataListParser : public isc::data::SimpleParser {
public:
    OptionDataListParser(const uint16_t address_family,
                         CfgOptionDefPtr cfg_option_def = CfgOptionDefPtr());

    void parse(const CfgOptionPtr& cfg,
               isc::data::ConstElementPtr option_data_list);
private:
    uint16_t address_family_;

    CfgOptionDefPtr cfg_option_def_;
};


} // end of namespace isc::dhcp
} // end of namespace isc

#endif // OPTION_DATA_PARSER_H