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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 "tcp-factory.hpp"
#include "core/resolver.hpp"
#include "core/logger.hpp"
#include "core/network-interface.hpp"
NFD_LOG_INIT("TcpFactory");
namespace nfd {
TcpFactory::TcpFactory(const std::string& defaultPort/* = "6363"*/)
: m_defaultPort(defaultPort)
{
}
void
TcpFactory::prohibitEndpoint(const tcp::Endpoint& endpoint)
{
using namespace boost::asio::ip;
static const address_v4 ALL_V4_ENDPOINT(address_v4::from_string("0.0.0.0"));
static const address_v6 ALL_V6_ENDPOINT(address_v6::from_string("::"));
const address& address = endpoint.address();
if (address.is_v4() && address == ALL_V4_ENDPOINT)
{
prohibitAllIpv4Endpoints(endpoint.port());
}
else if (endpoint.address().is_v6() && address == ALL_V6_ENDPOINT)
{
prohibitAllIpv6Endpoints(endpoint.port());
}
NFD_LOG_TRACE("prohibiting TCP " <<
endpoint.address().to_string() << ":" << endpoint.port());
m_prohibitedEndpoints.insert(endpoint);
}
void
TcpFactory::prohibitAllIpv4Endpoints(const uint16_t port)
{
using namespace boost::asio::ip;
const std::list<shared_ptr<NetworkInterfaceInfo> > nicList(listNetworkInterfaces());
for (std::list<shared_ptr<NetworkInterfaceInfo> >::const_iterator i = nicList.begin();
i != nicList.end();
++i)
{
const shared_ptr<NetworkInterfaceInfo>& nic = *i;
const std::vector<address_v4>& ipv4Addresses = nic->ipv4Addresses;
for (std::vector<address_v4>::const_iterator j = ipv4Addresses.begin();
j != ipv4Addresses.end();
++j)
{
prohibitEndpoint(tcp::Endpoint(*j, port));
}
}
}
void
TcpFactory::prohibitAllIpv6Endpoints(const uint16_t port)
{
using namespace boost::asio::ip;
const std::list<shared_ptr<NetworkInterfaceInfo> > nicList(listNetworkInterfaces());
for (std::list<shared_ptr<NetworkInterfaceInfo> >::const_iterator i = nicList.begin();
i != nicList.end();
++i)
{
const shared_ptr<NetworkInterfaceInfo>& nic = *i;
const std::vector<address_v6>& ipv6Addresses = nic->ipv6Addresses;
for (std::vector<address_v6>::const_iterator j = ipv6Addresses.begin();
j != ipv6Addresses.end();
++j)
{
prohibitEndpoint(tcp::Endpoint(*j, port));
}
}
}
shared_ptr<TcpChannel>
TcpFactory::createChannel(const tcp::Endpoint& endpoint)
{
shared_ptr<TcpChannel> channel = findChannel(endpoint);
if(static_cast<bool>(channel))
return channel;
channel = make_shared<TcpChannel>(boost::cref(endpoint));
m_channels[endpoint] = channel;
prohibitEndpoint(endpoint);
NFD_LOG_DEBUG("Channel [" << endpoint << "] created");
return channel;
}
shared_ptr<TcpChannel>
TcpFactory::createChannel(const std::string& localHost, const std::string& localPort)
{
return createChannel(TcpResolver::syncResolve(localHost, localPort));
}
shared_ptr<TcpChannel>
TcpFactory::findChannel(const tcp::Endpoint& localEndpoint)
{
ChannelMap::iterator i = m_channels.find(localEndpoint);
if (i != m_channels.end())
return i->second;
else
return shared_ptr<TcpChannel>();
}
void
TcpFactory::createFace(const FaceUri& uri,
const FaceCreatedCallback& onCreated,
const FaceConnectFailedCallback& onConnectFailed)
{
resolver::AddressSelector addressSelector = resolver::AnyAddress();
if (uri.getScheme() == "tcp4")
addressSelector = resolver::Ipv4Address();
else if (uri.getScheme() == "tcp6")
addressSelector = resolver::Ipv6Address();
if (!uri.getPath().empty())
{
onConnectFailed("Invalid URI");
}
TcpResolver::asyncResolve(uri.getHost(),
uri.getPort().empty() ? m_defaultPort : uri.getPort(),
bind(&TcpFactory::continueCreateFaceAfterResolve, this, _1,
onCreated, onConnectFailed),
onConnectFailed,
addressSelector);
}
void
TcpFactory::continueCreateFaceAfterResolve(const tcp::Endpoint& endpoint,
const FaceCreatedCallback& onCreated,
const FaceConnectFailedCallback& onConnectFailed)
{
if (m_prohibitedEndpoints.find(endpoint) != m_prohibitedEndpoints.end())
{
onConnectFailed("Requested endpoint is prohibited "
"(reserved by this NFD or disallowed by face management protocol)");
return;
}
// very simple logic for now
for (ChannelMap::iterator channel = m_channels.begin();
channel != m_channels.end();
++channel)
{
if ((channel->first.address().is_v4() && endpoint.address().is_v4()) ||
(channel->first.address().is_v6() && endpoint.address().is_v6()))
{
channel->second->connect(endpoint, onCreated, onConnectFailed);
return;
}
}
onConnectFailed("No channels available to connect to "
+ boost::lexical_cast<std::string>(endpoint));
}
} // namespace nfd