SocketAcceptor.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
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 * by the Free Software Foundation, either version 3 of the License, or
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 * GNU Lesser General Public License for more details.
 *
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
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 * MIT License
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#ifndef CORE_SOCKET_STREAM_SOCKETACCEPTOR_H
#define CORE_SOCKET_STREAM_SOCKETACCEPTOR_H
 
#include "core/eventreceiver/AcceptEventReceiver.h"
#include "core/socket/State.h"
 
namespace core::socket::stream {
    class SocketContextFactory;
}
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <functional>
#include <memory>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace core::socket::stream {
 
    /** Sequence diagram showing how a connect to a peer is performed.
    @startuml
    !include core/socket/stream/pu/SocketAcceptor.pu
    @enduml
    */
    template <typename PhysicalSocketServerT, typename ConfigT, template <typename PhysicalSocketServer> typename SocketConnectionT>
    class SocketAcceptor : protected core::eventreceiver::AcceptEventReceiver {
    private:
        using PhysicalServerSocket = PhysicalSocketServerT;
 
    protected:
        using Config = ConfigT;
        using SocketAddress = typename PhysicalServerSocket::SocketAddress;
        using SocketConnection = SocketConnectionT<PhysicalServerSocket>;
 
    public:
        SocketAcceptor(const std::shared_ptr<core::socket::stream::SocketContextFactory>& socketContextFactory,
                       const std::function<void(SocketConnection*)>& onConnect,
                       const std::function<void(SocketConnection*)>& onConnected,
                       const std::function<void(SocketConnection*)>& onDisconnect,
                       const std::function<void(const SocketAddress&, core::socket::State)>& onStatus,
                       const std::shared_ptr<Config>& config);
 
        SocketAcceptor(const SocketAcceptor& socketAcceptor);
 
        ~SocketAcceptor() override;
 
    protected:
        virtual void useNextSocketAddress() = 0;
 
        virtual void init();
 
    private:
        void acceptEvent() final;
 
        void unobservedEvent() final;
 
    protected:
        void destruct() final;
 
    private:
        PhysicalServerSocket physicalServerSocket;
        SocketAddress localAddress;
 
    protected:
        std::shared_ptr<core::socket::stream::SocketContextFactory> socketContextFactory = nullptr;
 
        std::function<void(SocketConnection*)> onConnect;
        std::function<void(SocketConnection*)> onConnected;
        std::function<void(SocketConnection*)> onDisconnect;
 
        std::function<void(const SocketAddress&, core::socket::State)> onStatus = nullptr;
 
        std::shared_ptr<Config> config;
    };
 
} // namespace core::socket::stream
 
#endif // CORE_SOCKET_STREAM_SOCKETACCEPTOR_H