transport.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2022 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library 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.
 *
 * ndn-cxx library 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 copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */
 
#ifndef NDN_CXX_TRANSPORT_TRANSPORT_HPP
#define NDN_CXX_TRANSPORT_TRANSPORT_HPP
 
#include "ndn-cxx/detail/asio-fwd.hpp"
#include "ndn-cxx/detail/common.hpp"
#include "ndn-cxx/encoding/block.hpp"
 
#include <boost/system/error_code.hpp>
 
namespace ndn {
 
class Transport : noncopyable
{
public:
  class Error : public std::runtime_error
  {
  public:
    using std::runtime_error::runtime_error;
 
    Error(const boost::system::error_code& code, const std::string& msg);
  };
 
  enum class State {
    CLOSED,
    CONNECTING,
    RUNNING,
    PAUSED,
  };
 
  using ReceiveCallback = std::function<void(const Block&)>;
 
public:
  virtual
  ~Transport() = default;
 
  virtual void
  connect(boost::asio::io_service& ioService, ReceiveCallback receiveCallback);
 
  virtual void
  close() = 0;
 
  virtual void
  send(const Block& block) = 0;
 
  virtual void
  pause() = 0;
 
  virtual void
  resume() = 0;
 
  State
  getState() const noexcept
  {
    return m_state;
  }
 
protected:
  void
  setState(State state) noexcept
  {
    m_state = state;
  }
 
protected:
  boost::asio::io_service* m_ioService = nullptr;
  ReceiveCallback m_receiveCallback;
 
private:
  State m_state = State::CLOSED;
};
 
} // namespace ndn
 
#endif // NDN_CXX_TRANSPORT_TRANSPORT_HPP