175 lines
5.1 KiB
C++
175 lines
5.1 KiB
C++
/*
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Copyright (c) 2006-2012, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_DISABLE_DHT
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#ifndef TORRENT_DHT_TRACKER
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#define TORRENT_DHT_TRACKER
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#include <fstream>
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#include <set>
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#include <numeric>
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#include <boost/bind.hpp>
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#include <boost/ref.hpp>
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#include <boost/intrusive_ptr.hpp>
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#include <boost/detail/atomic_count.hpp>
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#include "libtorrent/kademlia/node.hpp"
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#include "libtorrent/kademlia/node_id.hpp"
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#include "libtorrent/kademlia/traversal_algorithm.hpp"
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#include "libtorrent/session_settings.hpp"
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#include "libtorrent/session_status.hpp"
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#include "libtorrent/udp_socket.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/thread.hpp"
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#include "libtorrent/deadline_timer.hpp"
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namespace libtorrent
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{
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namespace aux { struct session_impl; }
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struct lazy_entry;
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}
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namespace libtorrent { namespace dht
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{
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#ifdef TORRENT_DHT_VERBOSE_LOGGING
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TORRENT_DECLARE_LOG(dht_tracker);
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#endif
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struct dht_tracker;
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TORRENT_EXTRA_EXPORT void intrusive_ptr_add_ref(dht_tracker const*);
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TORRENT_EXTRA_EXPORT void intrusive_ptr_release(dht_tracker const*);
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struct dht_tracker : udp_socket_interface, udp_socket_observer
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{
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friend void intrusive_ptr_add_ref(dht_tracker const*);
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friend void intrusive_ptr_release(dht_tracker const*);
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// TODO: take a udp_socket_interface here instead. Move udp_socket_interface down into libtorrent core
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dht_tracker(libtorrent::aux::session_impl& ses, rate_limited_udp_socket& sock
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, dht_settings const& settings, entry const* state = 0);
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virtual ~dht_tracker();
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void start(entry const& bootstrap);
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void stop();
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void add_node(udp::endpoint node);
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void add_node(std::pair<std::string, int> const& node);
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void add_router_node(udp::endpoint const& node);
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entry state() const;
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void announce(sha1_hash const& ih, int listen_port, bool seed
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, boost::function<void(std::vector<tcp::endpoint> const&)> f);
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void dht_status(session_status& s);
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void network_stats(int& sent, int& received);
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// translate bittorrent kademlia message into the generic kademlia message
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// used by the library
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virtual bool incoming_packet(error_code const& ec
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, udp::endpoint const&, char const* buf, int size);
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private:
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boost::intrusive_ptr<dht_tracker> self()
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{ return boost::intrusive_ptr<dht_tracker>(this); }
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void on_name_lookup(error_code const& e
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, udp::resolver::iterator host);
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void on_router_name_lookup(error_code const& e
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, udp::resolver::iterator host);
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void connection_timeout(error_code const& e);
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void refresh_timeout(error_code const& e);
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void tick(error_code const& e);
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// implements udp_socket_interface
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virtual bool send_packet(libtorrent::entry& e, udp::endpoint const& addr, int send_flags);
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node_impl m_dht;
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rate_limited_udp_socket& m_sock;
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std::vector<char> m_send_buf;
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ptime m_last_new_key;
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deadline_timer m_timer;
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deadline_timer m_connection_timer;
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deadline_timer m_refresh_timer;
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dht_settings const& m_settings;
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int m_refresh_bucket;
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bool m_abort;
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// used to resolve hostnames for nodes
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udp::resolver m_host_resolver;
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// sent and received bytes since queried last time
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int m_sent_bytes;
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int m_received_bytes;
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// used to ignore abusive dht nodes
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struct node_ban_entry
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{
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node_ban_entry(): count(0) {}
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address src;
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ptime limit;
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int count;
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};
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enum { num_ban_nodes = 20 };
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node_ban_entry m_ban_nodes[num_ban_nodes];
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// reference counter for intrusive_ptr
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mutable boost::detail::atomic_count m_refs;
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#ifdef TORRENT_DHT_VERBOSE_LOGGING
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int m_replies_sent[5];
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int m_queries_received[5];
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int m_replies_bytes_sent[5];
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int m_queries_bytes_received[5];
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int m_counter;
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int m_total_message_input;
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int m_total_in_bytes;
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int m_total_out_bytes;
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int m_queries_out_bytes;
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#endif
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};
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}}
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#endif
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#endif
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