premiere-libtorrent/include/libtorrent/kademlia/node_entry.hpp

/*

Copyright (c) 2006-2018, Arvid Norberg
All rights reserved.

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modification, are permitted provided that the following conditions
are met:

    * Redistributions of source code must retain the above copyright
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    * Redistributions in binary form must reproduce the above copyright
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      the documentation and/or other materials provided with the distribution.
    * Neither the name of the author nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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*/

#ifndef KADEMLIA_NODE_ENTRY_HPP
#define KADEMLIA_NODE_ENTRY_HPP

#include "libtorrent/kademlia/node_id.hpp"
#include "libtorrent/socket.hpp"
#include "libtorrent/address.hpp"
#include "libtorrent/union_endpoint.hpp"
#include "libtorrent/time.hpp" // for time_point

namespace libtorrent { namespace dht {

struct TORRENT_EXTRA_EXPORT node_entry
{
	node_entry(node_id const& id_, udp::endpoint const& ep, int roundtriptime = 0xffff
		, bool pinged = false);
	explicit node_entry(udp::endpoint const& ep);
	node_entry();
	void update_rtt(int new_rtt);

	bool pinged() const { return timeout_count != 0xff; }
	void set_pinged() { if (timeout_count == 0xff) timeout_count = 0; }
	void timed_out() { if (pinged() && timeout_count < 0xfe) ++timeout_count; }
	int fail_count() const { return pinged() ? timeout_count : 0; }
	void reset_fail_count() { if (pinged()) timeout_count = 0; }
	udp::endpoint ep() const { return endpoint; }
	bool confirmed() const { return timeout_count == 0; }
	address addr() const { return endpoint.address(); }
	int port() const { return endpoint.port; }

#ifndef TORRENT_DISABLE_LOGGING
	time_point first_seen;
#endif

	// the time we last received a response for a request to this peer
	time_point last_queried;

	node_id id;

	union_endpoint endpoint;

	// the average RTT of this node
	std::uint16_t rtt;

	// the number of times this node has failed to
	// respond in a row
	std::uint8_t timeout_count;
};

} } // namespace libtorrent::dht

#endif