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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
* Copyright (C) 2013 Regents of the University of California.
* See COPYING for copyright and distribution information.
*/
#ifndef NDN_TRANSPORT_TRANSPORT_HPP
#define NDN_TRANSPORT_TRANSPORT_HPP
#include "../common.hpp"
#include "../encoding/block.hpp"
namespace ndn {
class Transport
{
public:
class Error : public std::runtime_error
{
public:
inline Error(const boost::system::error_code& code, const std::string& msg);
inline Error(const std::string& msg);
};
typedef ptr_lib::function<void (const Block& wire)> ReceiveCallback;
typedef ptr_lib::function<void ()> ErrorCallback;
inline
Transport();
inline virtual
~Transport();
/**
* Connect transport
*
* @throws If connection cannot be established
*/
inline virtual void
connect(boost::asio::io_service& io_service,
const ReceiveCallback& receiveCallback);
/**
* Close the connection.
*/
virtual void
close() = 0;
/**
* @brief Set data to the host
*
* @param data A pointer to the buffer of data to send.
* @param dataLength The number of bytes in data.
*/
virtual void
send(const Block& wire) = 0;
/**
* @brief Alternative version of sending data, applying scatter/gather I/O concept
*
* Two non-consecutive memory blocks will be send out together, e.g., as part of the
* same message in datagram-oriented transports.
*/
virtual void
send(const Block& header, const Block& payload) = 0;
virtual void
pause() = 0;
virtual void
resume() = 0;
inline bool
isConnected();
inline bool
isExpectingData();
protected:
inline void
receive(const Block& wire);
protected:
boost::asio::io_service* m_ioService;
bool m_isConnected;
bool m_isExpectingData;
ReceiveCallback m_receiveCallback;
};
inline
Transport::Transport()
: m_ioService(0)
, m_isConnected(false)
, m_isExpectingData(false)
{
}
inline
Transport::Error::Error(const boost::system::error_code& code, const std::string& msg)
: std::runtime_error(msg + (code.value() ? " (" + code.category().message(code.value()) + ")" : ""))
{
}
inline
Transport::Error::Error(const std::string& msg)
: std::runtime_error(msg)
{
}
inline
Transport::~Transport()
{
}
inline void
Transport::connect(boost::asio::io_service& ioService,
const ReceiveCallback& receiveCallback)
{
m_ioService = &ioService;
m_receiveCallback = receiveCallback;
}
inline bool
Transport::isConnected()
{
return m_isConnected;
}
inline bool
Transport::isExpectingData()
{
return m_isExpectingData;
}
inline void
Transport::receive(const Block& wire)
{
m_receiveCallback(wire);
}
} // namespace ndn
#endif // NDN_TRANSPORT_TRANSPORT_HPP