ZeroTierOne/node/SelfAwareness.hpp

/*
 * ZeroTier One - Network Virtualization Everywhere
 * Copyright (C) 2011-2015  ZeroTier, Inc.
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * --
 *
 * ZeroTier may be used and distributed under the terms of the GPLv3, which
 * are available at: http://www.gnu.org/licenses/gpl-3.0.html
 *
 * If you would like to embed ZeroTier into a commercial application or
 * redistribute it in a modified binary form, please contact ZeroTier Networks
 * LLC. Start here: http://www.zerotier.com/
 */

#ifndef ZT_SELFAWARENESS_HPP
#define ZT_SELFAWARENESS_HPP

#include "InetAddress.hpp"
#include "Mutex.hpp"

namespace ZeroTier {

class RuntimeEnvironment;

/**
 * Tracks changes to this peer's real world addresses
 */
class SelfAwareness
{
public:
	SelfAwareness(const RuntimeEnvironment *renv);
	~SelfAwareness();

	/**
	 * Called when a trusted remote peer informs us of our external network address
	 *
	 * @param reporterPhysicalAddress Physical address that reporting peer seems to have
	 * @param myPhysicalAddress Physical address that peer says we have
	 * @param trusted True if this peer is trusted as an authority to inform us of external address changes
	 */
	void iam(const InetAddress &reporterPhysicalAddress,const InetAddress &myPhysicalAddress,bool trusted);

private:
	const RuntimeEnvironment *RR;
	Mutex _lock;
	InetAddress _lastPhysicalAddress[5]; // 5 == the number of address classes we care about, see InetAddress.hpp and SelfAwareness.cpp
};

} // namespace ZeroTier

#endif