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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2014 Regents of the University of California,
* Arizona Board of Regents,
* Colorado State University,
* University Pierre & Marie Curie, Sorbonne University,
* Washington University in St. Louis,
* Beijing Institute of Technology
*
* This file is part of NFD (Named Data Networking Forwarding Daemon).
* See AUTHORS.md for complete list of NFD authors and contributors.
*
* NFD 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.
*
* NFD 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
* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
**/
#include "unix-stream-channel.hpp"
#include "core/global-io.hpp"
#include <boost/filesystem.hpp>
#include <sys/stat.h> // for chmod()
namespace nfd {
NFD_LOG_INIT("UnixStreamChannel");
using namespace boost::asio::local;
UnixStreamChannel::UnixStreamChannel(const unix_stream::Endpoint& endpoint)
: m_endpoint(endpoint)
{
this->setUri(FaceUri(endpoint));
}
UnixStreamChannel::~UnixStreamChannel()
{
if (m_acceptor)
{
// use the non-throwing variants during destruction
// and ignore any errors
boost::system::error_code error;
m_acceptor->close(error);
boost::filesystem::remove(m_endpoint.path(), error);
}
}
void
UnixStreamChannel::listen(const FaceCreatedCallback& onFaceCreated,
const ConnectFailedCallback& onAcceptFailed,
int backlog/* = acceptor::max_connections*/)
{
if (m_acceptor) // already listening
return;
namespace fs = boost::filesystem;
fs::path p(m_endpoint.path());
if (fs::symlink_status(p).type() == fs::socket_file)
{
// for safety, remove an already existing file only if it's a socket
fs::remove(p);
}
m_acceptor = make_shared<stream_protocol::acceptor>(boost::ref(getGlobalIoService()));
m_acceptor->open(m_endpoint.protocol());
m_acceptor->bind(m_endpoint);
m_acceptor->listen(backlog);
if (::chmod(m_endpoint.path().c_str(), 0666) < 0)
{
throw Error("Failed to chmod() socket file at " + m_endpoint.path());
}
shared_ptr<stream_protocol::socket> clientSocket =
make_shared<stream_protocol::socket>(boost::ref(getGlobalIoService()));
m_acceptor->async_accept(*clientSocket,
bind(&UnixStreamChannel::handleSuccessfulAccept, this, _1,
clientSocket, onFaceCreated, onAcceptFailed));
}
void
UnixStreamChannel::createFace(const shared_ptr<stream_protocol::socket>& socket,
const FaceCreatedCallback& onFaceCreated)
{
shared_ptr<UnixStreamFace> face = make_shared<UnixStreamFace>(boost::cref(socket));
onFaceCreated(face);
}
void
UnixStreamChannel::handleSuccessfulAccept(const boost::system::error_code& error,
const shared_ptr<stream_protocol::socket>& socket,
const FaceCreatedCallback& onFaceCreated,
const ConnectFailedCallback& onAcceptFailed)
{
if (error) {
if (error == boost::system::errc::operation_canceled) // when socket is closed by someone
return;
NFD_LOG_DEBUG("Connection failed: "
<< error.category().message(error.value()));
onAcceptFailed("Connection failed: " +
error.category().message(error.value()));
return;
}
// prepare accepting the next connection
shared_ptr<stream_protocol::socket> clientSocket =
make_shared<stream_protocol::socket>(boost::ref(getGlobalIoService()));
m_acceptor->async_accept(*clientSocket,
bind(&UnixStreamChannel::handleSuccessfulAccept, this, _1,
clientSocket, onFaceCreated, onAcceptFailed));
NFD_LOG_DEBUG("[" << m_endpoint << "] << Incoming connection");
createFace(socket, onFaceCreated);
}
} // namespace nfd