/*
	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 <vector>
namespace ba = boost::asio;
namespace bi = ba::ip;

namespace dev
{

namespace p2p
{

struct NetworkPreferences
{
	NetworkPreferences(unsigned short p = 30303, std::string i = std::string(), bool u = true, bool l = false): listenPort(p), publicIP(i), upnp(u), localNetworking(l) {}

	unsigned short listenPort = 30303;
	std::string publicIP;
	bool upnp = true;
	bool localNetworking = false;
};

/**
 * @brief Network Class
 * Static network operations and interface(s).
 */
class Network
{
public:
	/// @returns public and private interface addresses
	static std::vector<bi::address> getInterfaceAddresses();
	
	/// Try to bind and listen on _listenPort, else attempt net-allocated port.
	static int listen4(bi::tcp::acceptor& _acceptor, unsigned short _listenPort);
	
	/// 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::vector<bi::address> const& _ifAddresses, unsigned short _listenPort, bi::address& o_upnpifaddr);
};

}
}