Program Listing for File udp_interface.hpp

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/*
==============================================================================
MIT License

Copyright (c) 2024 Ethan M Brown

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
==============================================================================
*/

#pragma once

#include <vector>
#include <string>

#include <boost/asio.hpp>
#include <boost/array.hpp>
#include <boost/bind/bind.hpp>

#include "network_interfaces/network_interface_base.hpp"

namespace network_bridge
{

using boost::asio::ip::address;
using boost::asio::ip::udp;
using boost::asio::io_context;

class UdpInterface : public NetworkInterface
{
public:
  UdpInterface()
  : NetworkInterface(),
    send_socket_(io_context_),
    receive_socket_(io_context_) {}

  virtual ~UdpInterface()
  {
    close();
  }

protected:
  void initialize_() override;

public:
  void open() override;

  void close() override;

  void write(const std::vector<uint8_t> & data) override;

protected:
  void start_receive();

  void receive(const boost::system::error_code & ec, std::size_t bytes_recvd);

  void error_handler(
    const boost::system::error_code & ec, const std::string & error_message,
    bool fatal = false);

private:
  void load_parameters();

  void setup_udp();

protected:
  io_context io_context_;
  std::thread io_thread_;

  udp::socket send_socket_;
  udp::endpoint send_endpoint_;
  udp::socket receive_socket_;
  udp::endpoint receive_endpoint_;
  std::string local_address_;
  int receive_port_;
  std::string remote_address_;
  int send_port_;
};

}  // namespace network_bridge