connection.hpp

/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * Copyright (C) 2025 Marco Craveiro <marco.craveiro@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */
#ifndef ORES_COMMS_NET_CONNECTION_HPP
#define ORES_COMMS_NET_CONNECTION_HPP
 
#include <atomic>
#include <cstdint>
#include <optional>
#include <boost/asio/ip/tcp.hpp>
#include <boost/asio/ssl.hpp>
#include <boost/asio/awaitable.hpp>
#include "ores.comms/messaging/frame.hpp"
#include "ores.logging/make_logger.hpp"
 
namespace ores::comms::net {
 
struct read_frame_result {
    std::expected<messaging::frame, ores::utility::serialization::error_code> frame;
 
    std::optional<std::uint32_t> failed_correlation_id;
};
 
class connection final {
private:
    inline static std::string_view logger_name = "ores.comms.net.connection";
 
    static auto& lg() {
        using namespace ores::logging;
        static auto instance = make_logger(logger_name);
        return instance;
    }
 
public:
    using ssl_socket = boost::asio::ssl::stream<boost::asio::ip::tcp::socket>;
 
    explicit connection(ssl_socket socket);
 
    boost::asio::awaitable<void> ssl_handshake_server(
        boost::asio::cancellation_slot cancel_slot = {});
 
    boost::asio::awaitable<void> ssl_handshake_client(
        boost::asio::cancellation_slot cancel_slot = {});
 
    boost::asio::awaitable<read_frame_result>
    read_frame(bool skip_version_check = false,
        boost::asio::cancellation_slot cancel_slot = {});
 
    boost::asio::awaitable<void> write_frame(const messaging::frame& frame,
        boost::asio::cancellation_slot cancel_slot = {});
 
    bool is_open() const;
 
    void close();
 
    std::string remote_address() const;
 
    [[nodiscard]] std::uint64_t bytes_sent() const;
 
    [[nodiscard]] std::uint64_t bytes_received() const;
 
    void reset_byte_counters();
 
private:
    ssl_socket socket_;
    std::atomic<std::uint64_t> bytes_sent_{0};
    std::atomic<std::uint64_t> bytes_received_{0};
};
 
}
 
#endif