Mqtt.h

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef IOT_MQTT_SERVER_SOCKETCONTEXT_H
#define IOT_MQTT_SERVER_SOCKETCONTEXT_H
 
#include "iot/mqtt/Mqtt.h" // IWYU pragma: export
 
namespace iot::mqtt {
    namespace packets {
        class Connect;
        class Disconnect;
        class Pingreq;
        class Subscribe;
        class Unsubscribe;
    } // namespace packets
 
    namespace server {
        namespace broker {
            class Broker;
        } // namespace broker
 
        namespace packets {
            class Connect;
            class Disconnect;
            class Pingreq;
            class Publish;
            class Puback;
            class Pubcomp;
            class Pubrec;
            class Pubrel;
            class Subscribe;
            class Unsubscribe;
        } // namespace packets
    } // namespace server
} // namespace iot::mqtt
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstdint>
#include <list>
#include <memory>
#include <string>
 
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace iot::mqtt::server {
 
    class Mqtt : public iot::mqtt::Mqtt {
    private:
        using Super = iot::mqtt::Mqtt;
 
    public:
        explicit Mqtt(const std::string& connectionName, const std::shared_ptr<broker::Broker>& broker);
 
        ~Mqtt() override;
 
    private:
        iot::mqtt::ControlPacketDeserializer* createControlPacketDeserializer(iot::mqtt::FixedHeader& fixedHeader) final;
        void deliverPacket(iot::mqtt::ControlPacketDeserializer* controlPacketDeserializer) override;
 
    protected:
        bool onSignal(int sig) override;
 
    private:
        using Super::initSession;
        bool initSession(const utils::Timeval& keepAlive);
        void releaseSession();
 
        virtual void onConnect(const iot::mqtt::packets::Connect& connect);
        virtual void onSubscribe(const iot::mqtt::packets::Subscribe& subscribe);
        virtual void onUnsubscribe(const iot::mqtt::packets::Unsubscribe& unsubscribe);
        virtual void onPingreq(const iot::mqtt::packets::Pingreq& pingreq);
        virtual void onDisconnect(const iot::mqtt::packets::Disconnect& disconnect);
 
        void _onConnect(const iot::mqtt::server::packets::Connect& connect);
        void _onPublish(const iot::mqtt::server::packets::Publish& publish);
        void _onSubscribe(const iot::mqtt::server::packets::Subscribe& subscribe);
        void _onUnsubscribe(const iot::mqtt::server::packets::Unsubscribe& unsubscribe);
        void _onPingreq(const iot::mqtt::server::packets::Pingreq& pingreq);
        void _onDisconnect(const iot::mqtt::server::packets::Disconnect& disconnect);
 
    public:
        void sendConnack(uint8_t returnCode, uint8_t flags) const;
        void sendSuback(uint16_t packetIdentifier, const std::list<uint8_t>& returnCodes) const;
        void sendUnsuback(uint16_t packetIdentifier) const;
        void sendPingresp() const;
 
        std::string getProtocol() const;
        uint8_t getLevel() const;
        uint8_t getConnectFlags() const;
        uint16_t getKeepAlive() const;
        std::string getClientId() const;
        std::string getWillTopic() const;
        std::string getWillMessage() const;
        std::string getUsername() const;
        std::string getPassword() const;
        bool getUsernameFlag() const;
        bool getPasswordFlag() const;
        bool getWillRetain() const;
        uint8_t getWillQoS() const;
        bool getWillFlag() const;
        bool getCleanSession() const;
        bool getReflect() const;
 
    protected:
        std::string protocol;
        uint8_t level = 0;
        uint8_t connectFlags = 0;
        uint16_t keepAlive = 0;
 
        std::string willTopic;
        std::string willMessage;
        std::string username;
        std::string password;
 
        bool usernameFlag = false;
        bool passwordFlag = false;
        bool willRetain = false;
        uint8_t willQoS = 0;
        bool willFlag = false;
        bool cleanSession = false;
        bool reflect = true;
 
        std::shared_ptr<iot::mqtt::server::broker::Broker> broker;
 
        friend class iot::mqtt::server::packets::Connect;
        friend class iot::mqtt::server::packets::Subscribe;
        friend class iot::mqtt::server::packets::Unsubscribe;
        friend class iot::mqtt::server::packets::Pingreq;
        friend class iot::mqtt::server::packets::Disconnect;
        friend class iot::mqtt::server::packets::Publish;
        friend class iot::mqtt::server::packets::Pubcomp;
        friend class iot::mqtt::server::packets::Pubrec;
        friend class iot::mqtt::server::packets::Puback;
        friend class iot::mqtt::server::packets::Pubrel;
    };
 
} // namespace iot::mqtt::server
 
#endif // IOT_MQTT_SERVER_SOCKETCONTEXT_H