/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * (c) ZeroTier, Inc.
 * https://www.zerotier.com/
 */

#ifndef ZT_MANAGEDROUTE_HPP
#define ZT_MANAGEDROUTE_HPP

#include "../node/AtomicCounter.hpp"
#include "../node/InetAddress.hpp"
#include "../node/SharedPtr.hpp"
#include "../node/Utils.hpp"

#include <map>
#include <stdexcept>
#include <stdlib.h>
#include <string.h>
#include <vector>

namespace ZeroTier {

/**
 * A ZT-managed route that used C++ RAII semantics to automatically clean itself up on deallocate
 */
class ManagedRoute {
	friend class SharedPtr<ManagedRoute>;

  public:
	ManagedRoute(const InetAddress& target, const InetAddress& via, const InetAddress& src, const char* device);
	~ManagedRoute();

	/**
	 * Set or update currently set route
	 *
	 * This must be called periodically for routes that shadow others so that
	 * shadow routes can be updated. In some cases it has no effect
	 *
	 * @return True if route add/update was successful
	 */
	bool sync();

	/**
	 * Remove and clear this ManagedRoute
	 *
	 * This does nothing if this ManagedRoute is not set or has already been
	 * removed. If this is not explicitly called it is called automatically on
	 * destruct.
	 */
	void remove();

	inline const InetAddress& target() const
	{
		return _target;
	}
	inline const InetAddress& via() const
	{
		return _via;
	}
	inline const InetAddress& src() const
	{
		return _src;
	}
	inline const char* device() const
	{
		return _device;
	}

  private:
	ManagedRoute(const ManagedRoute&)
	{
	}
	inline ManagedRoute& operator=(const ManagedRoute&)
	{
		return *this;
	}

	InetAddress _target;
	InetAddress _via;
	InetAddress _src;
	InetAddress _systemVia;					// for route overrides
	std::map<InetAddress, bool> _applied;	// routes currently applied
	char _device[128];
	char _systemDevice[128];   // for route overrides

	AtomicCounter __refCount;
};

}	// namespace ZeroTier

#endif