cb_ctl_dhcp.h

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// Copyright (C) 2019-2025 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 CB_CTL_DHCP_H
#define CB_CTL_DHCP_H
 
#include <cc/stamped_value.h>
#include <process/cb_ctl_base.h>
#include <dhcpsrv/srv_config.h>
 
namespace isc {
namespace dhcp {

template<typename ConfigBackendMgrType>
class CBControlDHCP : public process::CBControlBase<ConfigBackendMgrType> {
public:

    CBControlDHCP()
        : process::CBControlBase<ConfigBackendMgrType>() {
    }

    static bool translateName(std::string const& name, std::string& param_name,
                              std::string& sub_param_name) {
        param_name = name;
        sub_param_name = std::string();
        auto pos = param_name.find('.');
        if (pos != std::string::npos) {
            sub_param_name = param_name.substr(pos + 1);
            param_name = param_name.substr(0, pos);
            return (true);
        }
        return (false);
    }
 
protected:

    void translateAndAddGlobalsToConfig(SrvConfigPtr external_cfg,
                                        data::StampedValueCollection& cb_globals,
                                        data::SimpleKeywords global_lists) const {
        auto const& index = cb_globals.get<data::StampedValueNameIndexTag>();
        for (auto const& cb_global : index) {
            if (cb_global->amNull()) {
                continue;
            }
            data::ConstElementPtr value = cb_global->getElementValue();
            // All ListElement parameters must be converted from StringElement
            // (used by CB to store global list parameters).
            data::ElementPtr mutable_value = boost::const_pointer_cast<data::Element>(value);
            if (global_lists.count(cb_global->getName())) {
                mutable_value = data::Element::fromJSON(value->stringValue());
            }
            data::ConstElementPtr global_value = boost::const_pointer_cast<data::Element>(mutable_value);
            std::string param_name;
            std::string sub_param_name;
            if (translateName(cb_global->getName(), param_name, sub_param_name)) {
                data::ElementPtr sub_param = boost::const_pointer_cast<data::Element>(external_cfg->getConfiguredGlobal(param_name));
                if (!sub_param) {
                    sub_param = data::Element::createMap();
                }
                sub_param->set(sub_param_name, global_value);
                external_cfg->addConfiguredGlobal(param_name, sub_param);
            } else {
                // Reuse name and value.
                external_cfg->addConfiguredGlobal(param_name, global_value);
            }
        }
    }
};
 
} // end of namespace isc::dhcp
} // end of namespace isc
 
#endif // CB_CTL_DHCP_H