1232 lines
40 KiB
C++
1232 lines
40 KiB
C++
/*
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Copyright (c) 2006, 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_SESSION_IMPL_HPP_INCLUDED
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#define TORRENT_SESSION_IMPL_HPP_INCLUDED
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#include <algorithm>
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#include <vector>
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#include <set>
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#include <list>
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#include <stdarg.h> // for va_start, va_end
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#include "libtorrent/config.hpp"
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#include "libtorrent/aux_/session_settings.hpp"
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#include "libtorrent/aux_/session_interface.hpp"
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#include "libtorrent/uncork_interface.hpp"
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#include "libtorrent/linked_list.hpp"
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#include "libtorrent/torrent_peer.hpp"
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#include "libtorrent/torrent_peer_allocator.hpp"
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#include "libtorrent/performance_counters.hpp" // for counters
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#if TORRENT_HAS_BOOST_UNORDERED
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#include <boost/unordered_map.hpp>
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#endif
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/session.hpp" // for user_load_function_t
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#include "libtorrent/ip_voter.hpp"
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#include "libtorrent/torrent_handle.hpp"
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#include "libtorrent/entry.hpp"
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#include "libtorrent/socket.hpp"
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#include "libtorrent/peer_id.hpp"
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#include "libtorrent/tracker_manager.hpp"
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#include "libtorrent/debug.hpp"
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#include "libtorrent/piece_block_progress.hpp"
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#include "libtorrent/ip_filter.hpp"
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#include "libtorrent/config.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/add_torrent_params.hpp"
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#include "libtorrent/stat.hpp"
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#include "libtorrent/file_pool.hpp"
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#include "libtorrent/bandwidth_manager.hpp"
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#include "libtorrent/socket_type.hpp"
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#include "libtorrent/disk_io_thread.hpp"
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#include "libtorrent/udp_socket.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/thread.hpp"
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#include "libtorrent/alert_manager.hpp" // for alert_manager
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#include "libtorrent/deadline_timer.hpp"
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#include "libtorrent/socket_io.hpp" // for print_address
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#include "libtorrent/address.hpp"
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#include "libtorrent/utp_socket_manager.hpp"
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#include "libtorrent/bloom_filter.hpp"
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#include "libtorrent/rss.hpp"
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#include "libtorrent/peer_class.hpp"
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#include "libtorrent/disk_io_job.hpp" // block_cache_reference
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#include "libtorrent/network_thread_pool.hpp"
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#include "libtorrent/peer_class_type_filter.hpp"
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#include "libtorrent/kademlia/dht_observer.hpp"
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#include "libtorrent/resolver.hpp"
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#if TORRENT_COMPLETE_TYPES_REQUIRED
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#include "libtorrent/peer_connection.hpp"
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#endif
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#ifdef TORRENT_USE_OPENSSL
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#include <boost/asio/ssl/context.hpp>
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#endif
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namespace libtorrent
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{
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struct plugin;
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class upnp;
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class natpmp;
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class lsd;
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class torrent;
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class alert;
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struct cache_info;
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namespace dht
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{
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struct dht_tracker;
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class item;
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}
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struct bencode_map_entry;
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struct listen_socket_t
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{
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listen_socket_t(): external_port(0), ssl(false) {}
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// this is typically empty but can be set
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// to the WAN IP address of NAT-PMP or UPnP router
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address external_address;
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// this is typically set to the same as the local
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// listen port. In case a NAT port forward was
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// successfully opened, this will be set to the
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// port that is open on the external (NAT) interface
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// on the NAT box itself. This is the port that has
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// to be published to peers, since this is the port
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// the client is reachable through.
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int external_port;
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// set to true if this is an SSL listen socket
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bool ssl;
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// the actual socket
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boost::shared_ptr<socket_acceptor> sock;
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};
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namespace aux
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{
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struct session_impl;
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struct session_settings;
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#if defined TORRENT_LOGGING
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struct tracker_logger;
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#endif
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// used to initialize the g_current_time before
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// anything else
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struct initialize_timer
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{
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initialize_timer();
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};
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TORRENT_EXPORT std::pair<bencode_map_entry*, int> settings_map();
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// this is the link between the main thread and the
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// thread started to run the main downloader loop
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struct TORRENT_EXTRA_EXPORT session_impl
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: session_interface
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, dht::dht_observer
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, boost::noncopyable
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, initialize_timer
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, udp_socket_observer
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, uncork_interface
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, single_threaded
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{
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// the size of each allocation that is chained in the send buffer
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enum { send_buffer_size_impl = 128 };
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#ifdef TORRENT_DEBUG
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friend class ::libtorrent::peer_connection;
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#endif
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friend struct checker_impl;
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friend class invariant_access;
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typedef std::set<boost::shared_ptr<peer_connection> > connection_map;
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#if TORRENT_HAS_BOOST_UNORDERED
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typedef boost::unordered_map<sha1_hash, boost::shared_ptr<torrent> > torrent_map;
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#else
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typedef std::map<sha1_hash, boost::shared_ptr<torrent> > torrent_map;
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#endif
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session_impl();
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virtual ~session_impl();
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void init();
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void start_session(settings_pack const& pack);
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void set_load_function(user_load_function_t fun)
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{ m_user_load_torrent = fun; }
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void queue_async_resume_data(boost::shared_ptr<torrent> const& t);
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void done_async_resume();
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void async_resume_dispatched(int num_popped_resume);
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void init_peer_class_filter(bool unlimited_local);
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#ifndef TORRENT_DISABLE_EXTENSIONS
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void add_extension(boost::function<boost::shared_ptr<torrent_plugin>(
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torrent*, void*)> ext);
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void add_ses_extension(boost::shared_ptr<plugin> ext);
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#endif
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#if TORRENT_USE_ASSERTS
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bool has_peer(peer_connection const* p) const;
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bool any_torrent_has_peer(peer_connection const* p) const;
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bool is_single_thread() const { return single_threaded::is_single_thread(); }
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bool is_posting_torrent_updates() const { return m_posting_torrent_updates; }
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// this is set while the session is building the
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// torrent status update message
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bool m_posting_torrent_updates;
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#endif
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void main_thread();
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void open_listen_port();
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void init_settings();
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torrent_peer_allocator_interface* get_peer_allocator() { return &m_peer_allocator; }
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io_service& get_io_service() { return m_io_service; }
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resolver_interface& get_resolver() { return m_host_resolver; }
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void async_resolve(std::string const& host, int flags
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, callback_t const& h);
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std::vector<torrent*>& torrent_list(int i)
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{
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TORRENT_ASSERT(i >= 0);
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TORRENT_ASSERT(i < session_interface::num_torrent_lists);
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return m_torrent_lists[i];
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}
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// prioritize this torrent to be allocated some connection
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// attempts, because this torrent needs more peers.
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// this is typically done when a torrent starts out and
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// need the initial push to connect peers
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void prioritize_connections(boost::weak_ptr<torrent> t);
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// if we are listening on an IPv6 interface
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// this will return one of the IPv6 addresses on this
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// machine, otherwise just an empty endpoint
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tcp::endpoint get_ipv6_interface() const;
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tcp::endpoint get_ipv4_interface() const;
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void async_accept(boost::shared_ptr<socket_acceptor> const& listener, bool ssl);
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void on_accept_connection(boost::shared_ptr<socket_type> const& s
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, boost::weak_ptr<socket_acceptor> listener, error_code const& e, bool ssl);
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void on_socks_accept(boost::shared_ptr<socket_type> const& s
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, error_code const& e);
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void incoming_connection(boost::shared_ptr<socket_type> const& s);
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#ifndef TORRENT_NO_DEPRECATE
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feed_handle add_feed(feed_settings const& feed);
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void remove_feed(feed_handle h);
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void get_feeds(std::vector<feed_handle>* f) const;
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#endif
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boost::weak_ptr<torrent> find_torrent(sha1_hash const& info_hash) const;
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boost::weak_ptr<torrent> find_torrent(std::string const& uuid) const;
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#ifndef TORRENT_DISABLE_MUTABLE_TORRENTS
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std::vector<boost::shared_ptr<torrent> > find_collection(
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std::string const& collection) const;
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#endif
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boost::weak_ptr<torrent> find_disconnect_candidate_torrent() const;
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int num_torrents() const { return m_torrents.size(); }
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void insert_torrent(sha1_hash const& ih, boost::shared_ptr<torrent> const& t
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, std::string uuid);
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void insert_uuid_torrent(std::string uuid, boost::shared_ptr<torrent> const& t)
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{ m_uuids.insert(std::make_pair(uuid, t)); }
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boost::shared_ptr<torrent> delay_load_torrent(sha1_hash const& info_hash
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, peer_connection* pc);
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void set_queue_position(torrent* t, int p);
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peer_id const& get_peer_id() const { return m_peer_id; }
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void close_connection(peer_connection* p, error_code const& ec);
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#ifndef TORRENT_NO_DEPRECATE
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void set_settings(libtorrent::session_settings const& s);
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libtorrent::session_settings deprecated_settings() const;
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#endif
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void apply_settings_pack(settings_pack* pack);
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session_settings const& settings() const { return m_settings; }
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#ifndef TORRENT_DISABLE_DHT
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dht::dht_tracker* dht() { return m_dht.get(); }
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bool announce_dht() const { return !m_listen_sockets.empty(); }
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void add_dht_node_name(std::pair<std::string, int> const& node);
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void add_dht_node(udp::endpoint n);
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void add_dht_router(std::pair<std::string, int> const& node);
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void set_dht_settings(dht_settings const& s);
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dht_settings const& get_dht_settings() const { return m_dht_settings; }
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void start_dht();
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void stop_dht();
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void start_dht(entry const& startup_state);
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bool has_dht() const;
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// this is called for torrents when they are started
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// it will prioritize them for announcing to
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// the DHT, to get the initial peers quickly
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void prioritize_dht(boost::weak_ptr<torrent> t);
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void get_immutable_callback(sha1_hash target
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, dht::item const& i);
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void get_mutable_callback(dht::item const& i);
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void dht_get_immutable_item(sha1_hash const& target);
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void dht_get_mutable_item(boost::array<char, 32> key
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, std::string salt = std::string());
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void dht_put_item(entry data, sha1_hash target);
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void dht_put_mutable_item(boost::array<char, 32> key
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, boost::function<void(entry&, boost::array<char,64>&
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, boost::uint64_t&, std::string const&)> cb
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, std::string salt = std::string());
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#ifndef TORRENT_NO_DEPRECATE
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entry dht_state() const;
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#endif
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void on_dht_announce(error_code const& e);
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void on_dht_router_name_lookup(error_code const& e
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, std::vector<address> const& addresses, int port);
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#endif
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void maybe_update_udp_mapping(int nat, int local_port, int external_port);
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#if !defined(TORRENT_DISABLE_ENCRYPTION) && !defined(TORRENT_DISABLE_EXTENSIONS)
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torrent const* find_encrypted_torrent(
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sha1_hash const& info_hash, sha1_hash const& xor_mask);
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void add_obfuscated_hash(sha1_hash const& obfuscated, boost::weak_ptr<torrent> const& t);
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#endif
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void on_port_map_log(char const* msg, int map_transport);
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void on_lsd_announce(error_code const& e);
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#if defined TORRENT_LOGGING
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void on_lsd_log(char const* log);
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#endif
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// called when a port mapping is successful, or a router returns
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// a failure to map a port
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void on_port_mapping(int mapping, address const& ip, int port
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, error_code const& ec, int nat_transport);
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bool is_aborted() const { return m_abort; }
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bool is_paused() const { return m_paused; }
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void pause();
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void resume();
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void set_ip_filter(ip_filter const& f);
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ip_filter& get_ip_filter();
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void set_port_filter(port_filter const& f);
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port_filter const& get_port_filter() const;
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void queue_tracker_request(tracker_request& req
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, boost::weak_ptr<request_callback> c);
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// ==== peer class operations ====
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// implements session_interface
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void set_peer_classes(peer_class_set* s, address const& a, int st);
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peer_class_pool const& peer_classes() const { return m_classes; }
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peer_class_pool& peer_classes() { return m_classes; }
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bool ignore_unchoke_slots_set(peer_class_set const& set) const;
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int copy_pertinent_channels(peer_class_set const& set
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, int channel, bandwidth_channel** dst, int max);
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int use_quota_overhead(peer_class_set& set, int amount_down, int amount_up);
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bool use_quota_overhead(bandwidth_channel* ch, int channel, int amount);
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int create_peer_class(char const* name);
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void delete_peer_class(int cid);
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void set_peer_class_filter(ip_filter const& f);
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ip_filter const& get_peer_class_filter() const;
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void set_peer_class_type_filter(peer_class_type_filter f);
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peer_class_type_filter get_peer_class_type_filter();
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peer_class_info get_peer_class(int cid);
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void set_peer_class(int cid, peer_class_info const& pci);
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bool is_listening() const;
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#ifndef TORRENT_DISABLE_EXTENSIONS
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void add_extensions_to_torrent(
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boost::shared_ptr<torrent> const& torrent_ptr, void* userdata);
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#endif
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torrent_handle add_torrent(add_torrent_params const&, error_code& ec);
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torrent_handle add_torrent_impl(add_torrent_params const&, error_code& ec);
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void async_add_torrent(add_torrent_params* params);
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void on_async_load_torrent(disk_io_job const* j);
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void remove_torrent(torrent_handle const& h, int options);
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void remove_torrent_impl(boost::shared_ptr<torrent> tptr, int options);
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void get_torrent_status(std::vector<torrent_status>* ret
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, boost::function<bool(torrent_status const&)> const& pred
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, boost::uint32_t flags) const;
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void refresh_torrent_status(std::vector<torrent_status>* ret
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, boost::uint32_t flags) const;
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void post_torrent_updates(boost::uint32_t flags);
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void post_session_stats();
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void post_dht_stats();
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std::vector<torrent_handle> get_torrents() const;
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void pop_alerts(std::vector<alert*>* alerts);
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alert* wait_for_alert(time_duration max_wait);
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#ifndef TORRENT_NO_DEPRECATE
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void pop_alerts();
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alert const* pop_alert();
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void pop_alerts(std::deque<alert*>* alerts);
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size_t set_alert_queue_size_limit(size_t queue_size_limit_);
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int upload_rate_limit() const;
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int download_rate_limit() const;
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int local_upload_rate_limit() const;
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int local_download_rate_limit() const;
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void set_local_download_rate_limit(int bytes_per_second);
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void set_local_upload_rate_limit(int bytes_per_second);
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void set_download_rate_limit(int bytes_per_second);
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void set_upload_rate_limit(int bytes_per_second);
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void set_max_connections(int limit);
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void set_max_uploads(int limit);
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int max_connections() const;
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int max_uploads() const;
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#endif
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bandwidth_manager* get_bandwidth_manager(int channel);
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int upload_rate_limit(peer_class_t c) const;
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int download_rate_limit(peer_class_t c) const;
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void set_upload_rate_limit(peer_class_t c, int limit);
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void set_download_rate_limit(peer_class_t c, int limit);
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void set_rate_limit(peer_class_t c, int channel, int limit);
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int rate_limit(peer_class_t c, int channel) const;
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bool preemptive_unchoke() const;
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int num_uploads() const
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{ return int(m_stats_counters[counters::num_peers_up_unchoked]); }
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int num_connections() const
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{ return m_connections.size(); }
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int peak_up_rate() const { return m_peak_up_rate; }
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void trigger_unchoke()
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{
|
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TORRENT_ASSERT(is_single_thread());
|
|
m_unchoke_time_scaler = 0;
|
|
}
|
|
void trigger_optimistic_unchoke()
|
|
{
|
|
TORRENT_ASSERT(is_single_thread());
|
|
m_optimistic_unchoke_time_scaler = 0;
|
|
}
|
|
|
|
#ifndef TORRENT_NO_DEPRECATE
|
|
session_status status() const;
|
|
#endif
|
|
|
|
void set_peer_id(peer_id const& id);
|
|
void set_key(int key);
|
|
address listen_address() const;
|
|
boost::uint16_t listen_port() const;
|
|
boost::uint16_t ssl_listen_port() const;
|
|
|
|
alert_manager& alerts() { return m_alerts; }
|
|
disk_interface& disk_thread() { return m_disk_thread; }
|
|
|
|
void abort();
|
|
|
|
torrent_handle find_torrent_handle(sha1_hash const& info_hash);
|
|
|
|
void announce_lsd(sha1_hash const& ih, int port, bool broadcast = false);
|
|
|
|
void save_state(entry* e, boost::uint32_t flags) const;
|
|
void load_state(bdecode_node const* e);
|
|
|
|
bool has_connection(peer_connection* p) const;
|
|
void insert_peer(boost::shared_ptr<peer_connection> const& c);
|
|
|
|
proxy_settings proxy() const;
|
|
|
|
#ifndef TORRENT_DISABLE_DHT
|
|
bool is_dht_running() const { return (m_dht.get() != NULL); }
|
|
int external_udp_port() const { return m_external_udp_port; }
|
|
#endif
|
|
|
|
#if TORRENT_USE_I2P
|
|
char const* i2p_session() const { return m_i2p_conn.session_id(); }
|
|
proxy_settings i2p_proxy() const;
|
|
|
|
void on_i2p_open(error_code const& ec);
|
|
void open_new_incoming_i2p_connection();
|
|
void on_i2p_accept(boost::shared_ptr<socket_type> const& s
|
|
, error_code const& e);
|
|
#endif
|
|
|
|
void start_lsd();
|
|
natpmp* start_natpmp();
|
|
upnp* start_upnp();
|
|
|
|
void stop_lsd();
|
|
void stop_natpmp();
|
|
void stop_upnp();
|
|
|
|
int add_port_mapping(int t, int external_port
|
|
, int local_port);
|
|
void delete_port_mapping(int handle);
|
|
|
|
int next_port() const;
|
|
|
|
// load the specified torrent, also
|
|
// pick the least recently used torrent and unload it, unless
|
|
// t is the least recently used, then the next least recently
|
|
// used is picked
|
|
// returns true if the torrent was loaded successfully
|
|
bool load_torrent(torrent* t);
|
|
|
|
// bump t to the top of the list of least recently used. i.e.
|
|
// make it the most recently used. This is done every time
|
|
// an action is performed that required the torrent to be
|
|
// loaded, indicating activity
|
|
void bump_torrent(torrent* t, bool back = true);
|
|
|
|
// evict torrents until there's space for one new torrent,
|
|
void evict_torrents_except(torrent* ignore);
|
|
void evict_torrent(torrent* t);
|
|
|
|
void deferred_submit_jobs();
|
|
|
|
char* allocate_buffer();
|
|
torrent_peer* allocate_peer_entry(int type);
|
|
void free_peer_entry(torrent_peer* p);
|
|
|
|
void free_buffer(char* buf);
|
|
int send_buffer_size() const { return send_buffer_size_impl; }
|
|
|
|
// implements buffer_allocator_interface
|
|
void free_disk_buffer(char* buf);
|
|
char* allocate_disk_buffer(char const* category);
|
|
char* allocate_disk_buffer(bool& exceeded
|
|
, boost::shared_ptr<disk_observer> o
|
|
, char const* category);
|
|
char* async_allocate_disk_buffer(char const* category
|
|
, boost::function<void(char*)> const& handler);
|
|
void reclaim_block(block_cache_reference ref);
|
|
|
|
bool exceeded_cache_use() const
|
|
{ return m_disk_thread.exceeded_cache_use(); }
|
|
|
|
// implements dht_observer
|
|
virtual void set_external_address(address const& ip
|
|
, address const& source);
|
|
virtual void get_peers(sha1_hash const& ih);
|
|
virtual void announce(sha1_hash const& ih, address const& addr, int port);
|
|
virtual void outgoing_get_peers(sha1_hash const& target
|
|
, sha1_hash const& sent_target, udp::endpoint const& ep);
|
|
|
|
void set_external_address(address const& ip
|
|
, int source_type, address const& source);
|
|
virtual external_ip const& external_address() const;
|
|
|
|
// used when posting synchronous function
|
|
// calls to session_impl and torrent objects
|
|
mutable libtorrent::mutex mut;
|
|
mutable libtorrent::condition_variable cond;
|
|
|
|
// cork a peer and schedule a delayed uncork
|
|
// does nothing if the peer is already corked
|
|
void cork_burst(peer_connection* p);
|
|
|
|
// uncork all peers added to the delayed uncork queue
|
|
// implements uncork_interface
|
|
void do_delayed_uncork();
|
|
|
|
void post_socket_job(socket_job& j);
|
|
|
|
// implements session_interface
|
|
virtual tcp::endpoint bind_outgoing_socket(socket_type& s, address
|
|
const& remote_address, error_code& ec) const;
|
|
virtual bool verify_bound_address(address const& addr, bool utp
|
|
, error_code& ec);
|
|
|
|
bool has_lsd() const { return m_lsd.get() != NULL; }
|
|
|
|
std::vector<block_info>& block_info_storage() { return m_block_info_storage; }
|
|
|
|
libtorrent::utp_socket_manager* utp_socket_manager() { return &m_utp_socket_manager; }
|
|
void inc_boost_connections() { ++m_boost_connections; }
|
|
|
|
// private:
|
|
|
|
std::vector<torrent*> m_torrent_lists[num_torrent_lists];
|
|
|
|
peer_class_pool m_classes;
|
|
|
|
// private:
|
|
|
|
void submit_disk_jobs();
|
|
|
|
void update_proxy();
|
|
void update_i2p_bridge();
|
|
void update_peer_tos();
|
|
void update_user_agent();
|
|
void update_unchoke_limit();
|
|
void update_connection_speed();
|
|
void update_queued_disk_bytes();
|
|
void update_alert_queue_size();
|
|
void update_dht_upload_rate_limit();
|
|
void update_disk_threads();
|
|
void update_network_threads();
|
|
void update_cache_buffer_chunk_size();
|
|
void update_report_web_seed_downloads();
|
|
void trigger_auto_manage();
|
|
void update_outgoing_interfaces();
|
|
void update_listen_interfaces();
|
|
void update_privileged_ports();
|
|
void update_auto_sequential();
|
|
void update_max_failcount();
|
|
|
|
void update_upnp();
|
|
void update_natpmp();
|
|
void update_lsd();
|
|
void update_dht();
|
|
void update_count_slow();
|
|
void update_peer_fingerprint();
|
|
|
|
void on_trigger_auto_manage();
|
|
|
|
void update_socket_buffer_size();
|
|
void update_dht_announce_interval();
|
|
void update_anonymous_mode();
|
|
void update_force_proxy();
|
|
void update_download_rate();
|
|
void update_upload_rate();
|
|
void update_connections_limit();
|
|
#ifndef TORRENT_NO_DEPRECATE
|
|
void update_local_download_rate();
|
|
void update_local_upload_rate();
|
|
void update_rate_limit_utp();
|
|
void update_ignore_rate_limits_on_local_network();
|
|
#endif
|
|
void update_alert_mask();
|
|
|
|
void on_lsd_peer(tcp::endpoint peer, sha1_hash const& ih);
|
|
void setup_socket_buffers(socket_type& s);
|
|
|
|
// the settings for the client
|
|
aux::session_settings m_settings;
|
|
|
|
counters m_stats_counters;
|
|
|
|
// this is a pool allocator for torrent_peer objects
|
|
torrent_peer_allocator m_peer_allocator;
|
|
|
|
// this vector is used to store the block_info
|
|
// objects pointed to by partial_piece_info returned
|
|
// by torrent::get_download_queue.
|
|
std::vector<block_info> m_block_info_storage;
|
|
|
|
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
|
|
// this pool is used to allocate and recycle send
|
|
// buffers from.
|
|
boost::pool<> m_send_buffers;
|
|
#endif
|
|
|
|
// this is where all active sockets are stored.
|
|
// the selector can sleep while there's no activity on
|
|
// them
|
|
mutable io_service m_io_service;
|
|
|
|
#ifdef TORRENT_USE_OPENSSL
|
|
// this is a generic SSL context used when talking to
|
|
// unauthenticated HTTPS servers
|
|
asio::ssl::context m_ssl_ctx;
|
|
#endif
|
|
|
|
// handles delayed alerts
|
|
mutable alert_manager m_alerts;
|
|
|
|
#ifndef TORRENT_NO_DEPRECATE
|
|
// the alert pointers stored in m_alerts
|
|
mutable std::vector<alert*> m_alert_pointers;
|
|
|
|
// if not all the alerts in m_alert_pointers have been delivered to
|
|
// the client. This is the offset into m_alert_pointers where the next
|
|
// alert is. If this is greater than or equal to m_alert_pointers.size()
|
|
// it means we need to request new alerts from the main thread.
|
|
mutable int m_alert_pointer_pos;
|
|
#endif
|
|
|
|
// handles disk io requests asynchronously
|
|
// peers have pointers into the disk buffer
|
|
// pool, and must be destructed before this
|
|
// object. The disk thread relies on the file
|
|
// pool object, and must be destructed before
|
|
// m_files. The disk io thread posts completion
|
|
// events to the io service, and needs to be
|
|
// constructed after it.
|
|
disk_io_thread m_disk_thread;
|
|
|
|
// a thread pool used for async_write_some calls,
|
|
// to distribute its cost to multiple threads
|
|
std::vector<boost::shared_ptr<network_thread_pool> > m_net_thread_pool;
|
|
|
|
// the bandwidth manager is responsible for
|
|
// handing out bandwidth to connections that
|
|
// asks for it, it can also throttle the
|
|
// rate.
|
|
bandwidth_manager m_download_rate;
|
|
bandwidth_manager m_upload_rate;
|
|
|
|
// the peer class that all peers belong to by default
|
|
peer_class_t m_global_class;
|
|
|
|
// the peer class all TCP peers belong to by default
|
|
// all tcp peer connections are subject to these
|
|
// bandwidth limits. Local peers are excempted
|
|
// from this limit. The purpose is to be able to
|
|
// throttle TCP that passes over the internet
|
|
// bottleneck (i.e. modem) to avoid starving out
|
|
// uTP connections.
|
|
peer_class_t m_tcp_peer_class;
|
|
|
|
// peer class for local peers
|
|
peer_class_t m_local_peer_class;
|
|
|
|
tracker_manager m_tracker_manager;
|
|
torrent_map m_torrents;
|
|
|
|
#if !defined(TORRENT_DISABLE_ENCRYPTION) && !defined(TORRENT_DISABLE_EXTENSIONS)
|
|
// this maps obfuscated hashes to torrents. It's only
|
|
// used when encryption is enabled
|
|
torrent_map m_obfuscated_torrents;
|
|
#endif
|
|
|
|
// this is an LRU for torrents. It's used to determine
|
|
// which torrents should be loaded into RAM and which ones
|
|
// shouldn't. Each torrent that's loaded is part of this
|
|
// list.
|
|
linked_list m_torrent_lru;
|
|
|
|
std::map<std::string, boost::shared_ptr<torrent> > m_uuids;
|
|
|
|
// when saving resume data for many torrents, torrents are
|
|
// queued up in this list in order to not have too many of them
|
|
// outstanding at any given time, since the resume data may use
|
|
// a lot of memory.
|
|
std::list<boost::shared_ptr<torrent> > m_save_resume_queue;
|
|
|
|
// the number of save resume data disk jobs that are currently
|
|
// outstanding
|
|
int m_num_save_resume;
|
|
|
|
// peer connections are put here when disconnected to avoid
|
|
// race conditions with the disk thread. It's important that
|
|
// peer connections are destructed from the network thread,
|
|
// once a peer is disconnected, it's put in this list and
|
|
// every second their refcount is checked, and if it's 1,
|
|
// they are deleted (from the network thread)
|
|
std::vector<boost::shared_ptr<peer_connection> > m_undead_peers;
|
|
|
|
// keep the io_service alive until we have posted the job
|
|
// to clear the undead peers
|
|
boost::optional<io_service::work> m_work;
|
|
|
|
typedef std::list<boost::shared_ptr<torrent> > check_queue_t;
|
|
|
|
// this maps sockets to their peer_connection
|
|
// object. It is the complete list of all connected
|
|
// peers.
|
|
connection_map m_connections;
|
|
|
|
// this list holds incoming connections while they
|
|
// are performing SSL handshake. When we shut down
|
|
// the session, all of these are disconnected, otherwise
|
|
// they would linger and stall or hang session shutdown
|
|
std::set<boost::shared_ptr<socket_type> > m_incoming_sockets;
|
|
|
|
// maps IP ranges to bitfields representing peer class IDs
|
|
// to assign peers matching a specific IP range based on its
|
|
// remote endpoint
|
|
ip_filter m_peer_class_filter;
|
|
|
|
// maps socket types to peer classes
|
|
peer_class_type_filter m_peer_class_type_filter;
|
|
|
|
// filters incoming connections
|
|
ip_filter m_ip_filter;
|
|
|
|
// filters outgoing connections
|
|
port_filter m_port_filter;
|
|
|
|
// the peer id that is generated at the start of the session
|
|
peer_id m_peer_id;
|
|
|
|
// this is the highest queue position of any torrent
|
|
// in this session. queue positions are packed (i.e. there
|
|
// are no gaps). If there are no torrents with queue positions
|
|
// this is -1.
|
|
int m_max_queue_pos;
|
|
|
|
// the key is an id that is used to identify the
|
|
// client with the tracker only. It is randomized
|
|
// at startup
|
|
int m_key;
|
|
|
|
// the number of retries we make when binding the
|
|
// listen socket. For each retry the port number
|
|
// is incremented by one
|
|
int m_listen_port_retries;
|
|
|
|
// the addresses or device names of the interfaces we are supposed to
|
|
// listen on. if empty, it means that we should let the os decide
|
|
// which interface to listen on
|
|
std::vector<std::pair<std::string, int> > m_listen_interfaces;
|
|
|
|
// keep this around until everything uses the list of interfaces
|
|
// instead.
|
|
tcp::endpoint m_listen_interface;
|
|
|
|
// the network interfaces outgoing connections are opened through. If
|
|
// there is more then one, they are used in a round-robin fasion
|
|
// each element is a device name or IP address (in string form) and
|
|
// a port number. The port determins which port to bind the listen
|
|
// socket to, and the device or IP determines which network adapter
|
|
// to be used. If no adapter with the specified name exists, the listen
|
|
// socket fails.
|
|
// TODO: should this be renamed m_outgoing_interfaces?
|
|
std::vector<std::string> m_net_interfaces;
|
|
|
|
// if we're listening on an IPv6 interface
|
|
// this is one of the non local IPv6 interfaces
|
|
// on this machine
|
|
tcp::endpoint m_ipv6_interface;
|
|
tcp::endpoint m_ipv4_interface;
|
|
|
|
// since we might be listening on multiple interfaces
|
|
// we might need more than one listen socket
|
|
std::list<listen_socket_t> m_listen_sockets;
|
|
|
|
#if TORRENT_USE_I2P
|
|
i2p_connection m_i2p_conn;
|
|
boost::shared_ptr<socket_type> m_i2p_listen_socket;
|
|
#endif
|
|
|
|
#ifdef TORRENT_USE_OPENSSL
|
|
boost::asio::ssl::context* ssl_ctx() { return &m_ssl_ctx; }
|
|
void on_incoming_utp_ssl(boost::shared_ptr<socket_type> const& s);
|
|
void ssl_handshake(error_code const& ec, boost::shared_ptr<socket_type> s);
|
|
#endif
|
|
|
|
// when as a socks proxy is used for peers, also
|
|
// listen for incoming connections on a socks connection
|
|
boost::shared_ptr<socket_type> m_socks_listen_socket;
|
|
boost::uint16_t m_socks_listen_port;
|
|
|
|
// round-robin index into m_net_interfaces
|
|
mutable boost::uint8_t m_interface_index;
|
|
|
|
void open_new_incoming_socks_connection();
|
|
|
|
enum listen_on_flags_t
|
|
{
|
|
open_ssl_socket = 0x10
|
|
};
|
|
|
|
listen_socket_t setup_listener(std::string const& device
|
|
, bool ipv4, int port, int& retries, int flags, error_code& ec);
|
|
|
|
#ifndef TORRENT_DISABLE_DHT
|
|
entry m_dht_state;
|
|
#endif
|
|
|
|
// this is initialized to the unchoke_interval
|
|
// session_setting and decreased every second.
|
|
// when it reaches zero, it is reset to the
|
|
// unchoke_interval and the unchoke set is
|
|
// recomputed.
|
|
// TODO: replace this by a proper asio timer
|
|
int m_unchoke_time_scaler;
|
|
|
|
// this is used to decide when to recalculate which
|
|
// torrents to keep queued and which to activate
|
|
// TODO: replace this by a proper asio timer
|
|
int m_auto_manage_time_scaler;
|
|
|
|
// works like unchoke_time_scaler but it
|
|
// is only decresed when the unchoke set
|
|
// is recomputed, and when it reaches zero,
|
|
// the optimistic unchoke is moved to another peer.
|
|
// TODO: replace this by a proper asio timer
|
|
int m_optimistic_unchoke_time_scaler;
|
|
|
|
// works like unchoke_time_scaler. Each time
|
|
// it reaches 0, and all the connections are
|
|
// used, the worst connection will be disconnected
|
|
// from the torrent with the most peers
|
|
int m_disconnect_time_scaler;
|
|
|
|
// when this scaler reaches zero, it will
|
|
// scrape one of the auto managed, paused,
|
|
// torrents.
|
|
int m_auto_scrape_time_scaler;
|
|
|
|
// the index of the torrent that we'll
|
|
// refresh the next time
|
|
int m_next_explicit_cache_torrent;
|
|
|
|
// this is a counter of the number of seconds until
|
|
// the next time the read cache is rotated, if we're
|
|
// using an explicit read read cache.
|
|
int m_cache_rotation_timer;
|
|
|
|
// the index of the torrent that we'll
|
|
// refresh the next time
|
|
int m_next_suggest_torrent;
|
|
|
|
// this is a counter of the number of seconds until
|
|
// the next time the suggest pieces are refreshed
|
|
int m_suggest_timer;
|
|
|
|
// statistics gathered from all torrents.
|
|
stat m_stat;
|
|
|
|
// implements session_interface
|
|
virtual void sent_bytes(int bytes_payload, int bytes_protocol);
|
|
virtual void received_bytes(int bytes_payload, int bytes_protocol);
|
|
virtual void trancieve_ip_packet(int bytes, bool ipv6);
|
|
virtual void sent_syn(bool ipv6);
|
|
virtual void received_synack(bool ipv6);
|
|
|
|
int m_peak_up_rate;
|
|
int m_peak_down_rate;
|
|
|
|
void on_tick(error_code const& e);
|
|
|
|
void try_connect_more_peers();
|
|
void auto_manage_torrents(std::vector<torrent*>& list
|
|
, int& checking_limit, int& dht_limit, int& tracker_limit
|
|
, int& lsd_limit, int& hard_limit, int type_limit);
|
|
void recalculate_auto_managed_torrents();
|
|
void recalculate_unchoke_slots();
|
|
void recalculate_optimistic_unchoke_slots();
|
|
|
|
time_point m_created;
|
|
boost::int64_t session_time() const { return total_seconds(aux::time_now() - m_created); }
|
|
|
|
time_point m_last_tick;
|
|
time_point m_last_second_tick;
|
|
|
|
// the last time we went through the peers
|
|
// to decide which ones to choke/unchoke
|
|
time_point m_last_choke;
|
|
|
|
// the last time we recalculated which torrents should be started
|
|
// and stopped (only the auto managed ones)
|
|
time_point m_last_auto_manage;
|
|
|
|
#ifndef TORRENT_NO_DEPRECATE
|
|
// the time when the next rss feed needs updating
|
|
time_point m_next_rss_update;
|
|
|
|
// update any rss feeds that need updating and
|
|
// recalculate m_next_rss_update
|
|
void update_rss_feeds();
|
|
#endif
|
|
|
|
// when outgoing_ports is configured, this is the
|
|
// port we'll bind the next outgoing socket to
|
|
mutable int m_next_port;
|
|
|
|
#ifndef TORRENT_DISABLE_DHT
|
|
boost::shared_ptr<dht::dht_tracker> m_dht;
|
|
dht_settings m_dht_settings;
|
|
|
|
// these are used when starting the DHT
|
|
// (and bootstrapping it), and then erased
|
|
std::list<udp::endpoint> m_dht_router_nodes;
|
|
|
|
// this announce timer is used
|
|
// by the DHT.
|
|
deadline_timer m_dht_announce_timer;
|
|
|
|
// the number of torrents there were when the
|
|
// update_dht_announce_interval() was last called.
|
|
// if the number of torrents changes significantly
|
|
// compared to this number, the DHT announce interval
|
|
// is updated again. This especially matters for
|
|
// small numbers.
|
|
int m_dht_interval_update_torrents;
|
|
#endif
|
|
|
|
bool incoming_packet(error_code const& ec
|
|
, udp::endpoint const&, char const* buf, int size);
|
|
|
|
// see m_external_listen_port. This is the same
|
|
// but for the udp port used by the DHT.
|
|
int m_external_udp_port;
|
|
|
|
rate_limited_udp_socket m_udp_socket;
|
|
libtorrent::utp_socket_manager m_utp_socket_manager;
|
|
|
|
#ifdef TORRENT_USE_OPENSSL
|
|
// used for uTP connectons over SSL
|
|
udp_socket m_ssl_udp_socket;
|
|
libtorrent::utp_socket_manager m_ssl_utp_socket_manager;
|
|
#endif
|
|
|
|
// the number of torrent connection boosts
|
|
// connections that have been made this second
|
|
// this is deducted from the connect speed
|
|
int m_boost_connections;
|
|
|
|
boost::shared_ptr<natpmp> m_natpmp;
|
|
boost::shared_ptr<upnp> m_upnp;
|
|
boost::shared_ptr<lsd> m_lsd;
|
|
|
|
// mask is a bitmask of which protocols to remap on:
|
|
// 1: NAT-PMP
|
|
// 2: UPnP
|
|
void remap_tcp_ports(boost::uint32_t mask, int tcp_port, int ssl_port);
|
|
|
|
// 0 is natpmp 1 is upnp
|
|
int m_tcp_mapping[2];
|
|
int m_udp_mapping[2];
|
|
#ifdef TORRENT_USE_OPENSSL
|
|
int m_ssl_tcp_mapping[2];
|
|
int m_ssl_udp_mapping[2];
|
|
#endif
|
|
|
|
// the timer used to fire the tick
|
|
deadline_timer m_timer;
|
|
|
|
// torrents are announced on the local network in a
|
|
// round-robin fashion. All torrents are cycled through
|
|
// within the LSD announce interval (which defaults to
|
|
// 5 minutes)
|
|
torrent_map::iterator m_next_lsd_torrent;
|
|
|
|
#ifndef TORRENT_DISABLE_DHT
|
|
// torrents are announced on the DHT in a
|
|
// round-robin fashion. All torrents are cycled through
|
|
// within the DHT announce interval (which defaults to
|
|
// 15 minutes)
|
|
torrent_map::iterator m_next_dht_torrent;
|
|
|
|
// torrents that don't have any peers
|
|
// when added should be announced to the DHT
|
|
// as soon as possible. Such torrents are put
|
|
// in this queue and get announced the next time
|
|
// the timer fires, instead of the next one in
|
|
// the round-robin sequence.
|
|
std::deque<boost::weak_ptr<torrent> > m_dht_torrents;
|
|
#endif
|
|
|
|
// torrents prioritized to get connection attempts
|
|
std::deque<std::pair<boost::weak_ptr<torrent>, int> > m_prio_torrents;
|
|
|
|
// this announce timer is used
|
|
// by Local service discovery
|
|
deadline_timer m_lsd_announce_timer;
|
|
|
|
resolver m_host_resolver;
|
|
|
|
// the index of the torrent that will be offered to
|
|
// connect to a peer next time on_tick is called.
|
|
// This implements a round robin peer connections among
|
|
// torrents that want more peers. The index is into
|
|
// m_torrent_lists[torrent_want_peers_downloading]
|
|
// (which is a list of torrent pointers with all
|
|
// torrents that want peers and are downloading)
|
|
int m_next_downloading_connect_torrent;
|
|
int m_next_finished_connect_torrent;
|
|
|
|
// this is the number of attempts of connecting to
|
|
// peers we have given to downloading torrents.
|
|
// when this gets high enough, we try to connect
|
|
// a peer from a finished torrent
|
|
int m_download_connect_attempts;
|
|
|
|
// index into m_torrent_lists[torrent_want_scrape] referring
|
|
// to the next torrent to auto-scrape
|
|
int m_next_scrape_torrent;
|
|
|
|
#if TORRENT_USE_INVARIANT_CHECKS
|
|
void check_invariant() const;
|
|
#endif
|
|
|
|
#ifdef TORRENT_REQUEST_LOGGING
|
|
// used to log all requests from peers
|
|
FILE* m_request_log;
|
|
FILE* get_request_log() { return m_request_log; }
|
|
#endif
|
|
|
|
counters& stats_counters() { return m_stats_counters; }
|
|
|
|
void received_buffer(int size);
|
|
void sent_buffer(int size);
|
|
|
|
// each second tick the timer takes a little
|
|
// bit longer than one second to trigger. The
|
|
// extra time it took is accumulated into this
|
|
// counter. Every time it exceeds 1000, torrents
|
|
// will tick their timers 2 seconds instead of one.
|
|
// this keeps the timers more accurate over time
|
|
// as a kind of "leap second" to adjust for the
|
|
// accumulated error
|
|
boost::uint16_t m_tick_residual;
|
|
|
|
#if defined TORRENT_LOGGING
|
|
virtual void session_log(char const* fmt, ...) const;
|
|
virtual void session_vlog(char const* fmt, va_list& va) const;
|
|
|
|
// this list of tracker loggers serves as tracker_callbacks when
|
|
// shutting down. This list is just here to keep them alive during
|
|
// whe shutting down process
|
|
std::list<boost::shared_ptr<tracker_logger> > m_tracker_loggers;
|
|
|
|
FILE* m_request_logger;
|
|
#endif
|
|
|
|
private:
|
|
|
|
// state for keeping track of external IPs
|
|
external_ip m_external_ip;
|
|
|
|
#ifndef TORRENT_DISABLE_EXTENSIONS
|
|
typedef std::list<boost::shared_ptr<plugin> > ses_extension_list_t;
|
|
ses_extension_list_t m_ses_extensions;
|
|
#endif
|
|
|
|
// if this function is set, it indicates that torrents are allowed
|
|
// to be unloaded. If it isn't, torrents will never be unloaded
|
|
user_load_function_t m_user_load_torrent;
|
|
|
|
// this is true whenever we have posted a deferred-disk job
|
|
// it means we don't need to post another one
|
|
bool m_deferred_submit_disk_jobs;
|
|
|
|
// this is set to true when a torrent auto-manage
|
|
// event is triggered, and reset whenever the message
|
|
// is delivered and the auto-manage is executed.
|
|
// there should never be more than a single pending auto-manage
|
|
// message in-flight at any given time.
|
|
bool m_pending_auto_manage;
|
|
|
|
// this is also set to true when triggering an auto-manage
|
|
// of the torrents. However, if the normal auto-manage
|
|
// timer comes along and executes the auto-management,
|
|
// this is set to false, which means the triggered event
|
|
// no longer needs to execute the auto-management.
|
|
bool m_need_auto_manage;
|
|
|
|
// set to true when the session object
|
|
// is being destructed and the thread
|
|
// should exit
|
|
bool m_abort;
|
|
|
|
// is true if the session is paused
|
|
bool m_paused;
|
|
|
|
#ifndef TORRENT_NO_DEPRECATE
|
|
std::vector<boost::shared_ptr<feed> > m_feeds;
|
|
#endif
|
|
|
|
// this is a list of peer connections who have been
|
|
// corked (i.e. their network socket) and needs to be
|
|
// uncorked at the end of the burst of events. This is
|
|
// here to coalesce the effects of bursts of events
|
|
// into fewer network writes, saving CPU and possibly
|
|
// ending up sending larger network packets
|
|
std::vector<peer_connection*> m_delayed_uncorks;
|
|
|
|
// the main working thread
|
|
boost::scoped_ptr<thread> m_thread;
|
|
|
|
#if TORRENT_USE_ASSERTS && defined BOOST_HAS_PTHREADS
|
|
pthread_t m_network_thread;
|
|
#endif
|
|
};
|
|
|
|
#if defined TORRENT_LOGGING
|
|
struct tracker_logger : request_callback
|
|
{
|
|
tracker_logger(session_interface& ses);
|
|
void tracker_warning(tracker_request const& req
|
|
, std::string const& str);
|
|
void tracker_response(tracker_request const&
|
|
, libtorrent::address const& tracker_ip
|
|
, std::list<address> const& ip_list
|
|
, struct tracker_response const& resp);
|
|
void tracker_request_timed_out(
|
|
tracker_request const&);
|
|
void tracker_request_error(tracker_request const& r
|
|
, int response_code, error_code const& ec, const std::string& str
|
|
, int retry_interval);
|
|
void debug_log(const char* fmt, ...) const;
|
|
session_interface& m_ses;
|
|
};
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|
|
|