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/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Network.h
* @author Alex Leverington <nessence@gmail.com>
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <memory>
#include <vector>
#include <deque>
#include <array>
#include <libdevcore/RLP.h>
#include <libdevcore/Guards.h>
#include "Common.h"
namespace ba = boost::asio;
namespace bi = ba::ip;
namespace dev
{
namespace p2p
{
struct NetworkPreferences
{
// Default Network Preferences
NetworkPreferences(unsigned short lp = 30303): listenPort(lp) {}
// Network Preferences with specific Listen IP
NetworkPreferences(std::string const& l, unsigned short lp = 30303, bool u = true): publicIPAddress(), listenIPAddress(l), listenPort(lp), traverseNAT(u) {}
// Network Preferences with intended Public IP
NetworkPreferences(std::string const& publicIP, std::string const& l = std::string(), unsigned short lp = 30303, bool u = true): publicIPAddress(publicIP), listenIPAddress(l), listenPort(lp), traverseNAT(u) { if (!publicIPAddress.empty() && !isPublicAddress(publicIPAddress)) BOOST_THROW_EXCEPTION(InvalidPublicIPAddress()); }
std::string publicIPAddress;
std::string listenIPAddress;
unsigned short listenPort = 30303;
bool traverseNAT = true;
bool discovery = true; // Discovery is activated with network.
bool pin = false; // Only connect to trusted ("required") peers.
};
/**
* @brief Network Class
* Static network operations and interface(s).
*/
class Network
{
public:
/// @returns public and private interface addresses
static std::set<bi::address> getInterfaceAddresses();
/// Try to bind and listen on _listenPort, else attempt net-allocated port.
static int tcp4Listen(bi::tcp::acceptor& _acceptor, NetworkPreferences const& _netPrefs);
/// Return public endpoint of upnp interface. If successful o_upnpifaddr will be a private interface address and endpoint will contain public address and port.
static bi::tcp::endpoint traverseNAT(std::set<bi::address> const& _ifAddresses, unsigned short _listenPort, bi::address& o_upnpInterfaceAddr);
/// Resolve "host:port" string as TCP endpoint. Returns unspecified endpoint on failure.
static bi::tcp::endpoint resolveHost(std::string const& _host);
};
}
}