cfgmgr.h

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// Copyright (C) 2012-2022 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 CFGMGR_H
#define CFGMGR_H

#include <asiolink/io_address.h>
#include <dhcp/option.h>
#include <dhcp/option_space.h>
#include <dhcp/classify.h>
#include <dhcpsrv/d2_client_mgr.h>
#include <dhcpsrv/pool.h>
#include <dhcpsrv/srv_config.h>
#include <util/buffer.h>
#include <util/optional.h>

#include <boost/shared_ptr.hpp>
#include <boost/noncopyable.hpp>

#include <map>
#include <string>
#include <vector>
#include <list>

namespace isc {
namespace dhcp {

class DuplicateListeningIface : public Exception {
public:
    DuplicateListeningIface(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { };
};

class CfgMgr : public boost::noncopyable {
public:

    static const size_t CONFIG_LIST_SIZE;

    static CfgMgr& instance();

    util::Optional<std::string> getDataDir() const;

    void setDataDir(const std::string& datadir, bool unspecified = true);

    void setD2ClientConfig(D2ClientConfigPtr& new_config);

    bool ddnsEnabled();

    const D2ClientConfigPtr& getD2ClientConfig() const;

    D2ClientMgr& getD2ClientMgr();



    void clear();

    void commit();

    void rollback();

    void revert(const size_t index);

    SrvConfigPtr getCurrentCfg();

    SrvConfigPtr getStagingCfg();

    SrvConfigPtr createExternalCfg();

    void mergeIntoStagingCfg(const uint32_t seq);

    void mergeIntoCurrentCfg(const uint32_t seq);


    void setFamily(uint16_t family) {
        family_ = family == AF_INET ? AF_INET : AF_INET6;
    }

    uint16_t getFamily() const {
        return (family_);
    }


protected:

    CfgMgr();

    virtual ~CfgMgr();

private:

    void ensureCurrentAllocated();


    void mergeIntoCfg(const SrvConfigPtr& taget_config, const uint32_t seq);

    util::Optional<std::string> datadir_;

    D2ClientMgr d2_client_mgr_;

    SrvConfigPtr configuration_;


    typedef std::list<SrvConfigPtr> SrvConfigList;

    SrvConfigList configs_;


    typedef std::map<uint32_t, SrvConfigPtr> SrvConfigMap;

    SrvConfigMap external_configs_;

    uint16_t family_;
};

} // namespace isc::dhcp
} // namespace isc

#endif // CFGMGR_H