unix-transport.cpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#include "common.hpp"

#include "unix-transport.hpp"
#include "stream-transport.hpp"

#include "../face.hpp"
#include "util/face-uri.hpp"

namespace ndn {

UnixTransport::UnixTransport(const std::string& unixSocket)
  : m_unixSocket(unixSocket)
{
}

UnixTransport::~UnixTransport()
{
}

std::string
UnixTransport::getDefaultSocketName(const ConfigFile& config)
{
  const ConfigFile::Parsed& parsed = config.getParsedConfiguration();

  try
    {
      const util::FaceUri uri(parsed.get<std::string>("transport"));

      if (uri.getScheme() != "unix")
        {
          BOOST_THROW_EXCEPTION(Transport::Error("Cannot create UnixTransport from \"" +
                                                 uri.getScheme() + "\" URI"));
        }

      if (!uri.getPath().empty())
        {
          return uri.getPath();
        }
    }
  catch (const boost::property_tree::ptree_bad_path& error)
    {
      // no transport specified
    }
  catch (const boost::property_tree::ptree_bad_data& error)
    {
      BOOST_THROW_EXCEPTION(ConfigFile::Error(error.what()));
    }
  catch (const util::FaceUri::Error& error)
    {
      BOOST_THROW_EXCEPTION(ConfigFile::Error(error.what()));
    }

  // Assume the default nfd.sock location.
  return "/var/run/nfd.sock";
}

shared_ptr<UnixTransport>
UnixTransport::create(const ConfigFile& config)
{
  return make_shared<UnixTransport>(getDefaultSocketName(config));
}

void
UnixTransport::connect(boost::asio::io_service& ioService,
                       const ReceiveCallback& receiveCallback)
{
  if (!static_cast<bool>(m_impl)) {
    Transport::connect(ioService, receiveCallback);

    m_impl = make_shared<Impl>(ref(*this), ref(ioService));
  }

  m_impl->connect(boost::asio::local::stream_protocol::endpoint(m_unixSocket));
}

void
UnixTransport::send(const Block& wire)
{
  BOOST_ASSERT(static_cast<bool>(m_impl));
  m_impl->send(wire);
}

void
UnixTransport::send(const Block& header, const Block& payload)
{
  BOOST_ASSERT(static_cast<bool>(m_impl));
  m_impl->send(header, payload);
}

void
UnixTransport::close()
{
  BOOST_ASSERT(static_cast<bool>(m_impl));
  m_impl->close();
  m_impl.reset();
}

void
UnixTransport::pause()
{
  if (static_cast<bool>(m_impl)) {
    m_impl->pause();
  }
}

void
UnixTransport::resume()
{
  BOOST_ASSERT(static_cast<bool>(m_impl));
  m_impl->resume();
}

}