/* Copyright (c) 2006, Arvid Norberg All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in 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 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef TORRENT_SESSION_IMPL_HPP_INCLUDED #define TORRENT_SESSION_IMPL_HPP_INCLUDED #include #include #include #include #include // for va_start, va_end #ifndef TORRENT_DISABLE_GEO_IP #ifdef WITH_SHIPPED_GEOIP_H #include "libtorrent/GeoIP.h" #else #include #endif #endif #ifdef _MSC_VER #pragma warning(push, 1) #endif #include #ifdef _MSC_VER #pragma warning(pop) #endif #include "libtorrent/ip_voter.hpp" #include "libtorrent/torrent_handle.hpp" #include "libtorrent/entry.hpp" #include "libtorrent/socket.hpp" #include "libtorrent/peer_id.hpp" #include "libtorrent/tracker_manager.hpp" #include "libtorrent/debug.hpp" #include "libtorrent/piece_block_progress.hpp" #include "libtorrent/ip_filter.hpp" #include "libtorrent/config.hpp" #include "libtorrent/session_settings.hpp" #include "libtorrent/session_status.hpp" #include "libtorrent/add_torrent_params.hpp" #include "libtorrent/stat.hpp" #include "libtorrent/file_pool.hpp" #include "libtorrent/bandwidth_manager.hpp" #include "libtorrent/socket_type.hpp" #include "libtorrent/connection_queue.hpp" #include "libtorrent/disk_io_thread.hpp" #include "libtorrent/udp_socket.hpp" #include "libtorrent/assert.hpp" #include "libtorrent/thread.hpp" #include "libtorrent/policy.hpp" // for policy::peer #include "libtorrent/alert_manager.hpp" // for alert_manager #include "libtorrent/deadline_timer.hpp" #include "libtorrent/socket_io.hpp" // for print_address #include "libtorrent/address.hpp" #include "libtorrent/utp_socket_manager.hpp" #include "libtorrent/bloom_filter.hpp" #include "libtorrent/rss.hpp" #include "libtorrent/alert_dispatcher.hpp" #include "libtorrent/kademlia/dht_observer.hpp" #if TORRENT_COMPLETE_TYPES_REQUIRED #include "libtorrent/peer_connection.hpp" #endif #ifdef TORRENT_USE_OPENSSL #include #endif #if defined TORRENT_STATS && defined __MACH__ #include #include #include #include #endif namespace libtorrent { struct plugin; class upnp; class natpmp; class lsd; struct fingerprint; class torrent; class alert; namespace dht { struct dht_tracker; } struct bencode_map_entry; struct listen_socket_t { listen_socket_t(): external_port(0), ssl(false) {} // this is typically empty but can be set // to the WAN IP address of NAT-PMP or UPnP router address external_address; // this is typically set to the same as the local // listen port. In case a NAT port forward was // successfully opened, this will be set to the // port that is open on the external (NAT) interface // on the NAT box itself. This is the port that has // to be published to peers, since this is the port // the client is reachable through. int external_port; // set to true if this is an SSL listen socket bool ssl; // the actual socket boost::shared_ptr sock; }; namespace aux { struct session_impl; #if defined TORRENT_STATS && !defined __MACH__ struct vm_statistics_data_t { boost::uint64_t active_count; boost::uint64_t inactive_count; boost::uint64_t wire_count; boost::uint64_t free_count; boost::uint64_t pageins; boost::uint64_t pageouts; boost::uint64_t faults; }; #endif struct thread_cpu_usage { ptime user_time; ptime system_time; }; #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING struct tracker_logger; #endif // used to initialize the g_current_time before // anything else struct initialize_timer { initialize_timer(); }; TORRENT_EXPORT std::pair settings_map(); // this is the link between the main thread and the // thread started to run the main downloader loop struct TORRENT_EXTRA_EXPORT session_impl : alert_dispatcher , dht::dht_observer , boost::noncopyable , initialize_timer , udp_socket_observer , boost::enable_shared_from_this { #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING // this needs to be destructed last, since other components may log // things as they are being destructed. That's why it's declared at // the top of session_impl boost::shared_ptr m_logger; #endif // the size of each allocation that is chained in the send buffer enum { send_buffer_size = 128 }; #ifdef TORRENT_DEBUG friend class ::libtorrent::peer_connection; #endif friend struct checker_impl; friend class invariant_access; typedef std::set > connection_map; typedef std::map > torrent_map; session_impl( std::pair listen_port_range , fingerprint const& cl_fprint , char const* listen_interface , boost::uint32_t alert_mask); virtual ~session_impl(); void update_dht_announce_interval(); void init(); void start_session(); #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING void set_log_path(std::string const& p) { m_logpath = p; } #endif #ifndef TORRENT_DISABLE_EXTENSIONS void add_extension(boost::function( torrent*, void*)> ext); void add_ses_extension(boost::shared_ptr ext); #endif #if TORRENT_USE_ASSERTS bool has_peer(peer_connection const* p) const { TORRENT_ASSERT(is_network_thread()); return std::find_if(m_connections.begin(), m_connections.end() , boost::bind(&boost::intrusive_ptr::get, _1) == p) != m_connections.end(); } // this is set while the session is building the // torrent status update message bool m_posting_torrent_updates; #endif void main_thread(); void open_listen_port(int flags, error_code& ec); // prioritize this torrent to be allocated some connection // attempts, because this torrent needs more peers. // this is typically done when a torrent starts out and // need the initial push to connect peers void prioritize_connections(boost::weak_ptr t); // if we are listening on an IPv6 interface // this will return one of the IPv6 addresses on this // machine, otherwise just an empty endpoint tcp::endpoint get_ipv6_interface() const; tcp::endpoint get_ipv4_interface() const; void async_accept(boost::shared_ptr const& listener, bool ssl); void on_accept_connection(boost::shared_ptr const& s , boost::weak_ptr listener, error_code const& e, bool ssl); void on_socks_accept(boost::shared_ptr const& s , error_code const& e); void incoming_connection(boost::shared_ptr const& s); #if TORRENT_USE_ASSERTS bool is_network_thread() const { #if defined BOOST_HAS_PTHREADS if (m_network_thread == 0) return true; return m_network_thread == pthread_self(); #endif return true; } bool is_not_network_thread() const { #if defined BOOST_HAS_PTHREADS if (m_network_thread == 0) return true; return m_network_thread != pthread_self(); #endif return true; } #endif feed_handle add_feed(feed_settings const& feed); void remove_feed(feed_handle h); void get_feeds(std::vector* f) const; boost::weak_ptr find_torrent(sha1_hash const& info_hash) const; boost::weak_ptr find_torrent(std::string const& uuid) const; boost::weak_ptr find_disconnect_candidate_torrent() const; peer_id const& get_peer_id() const { return m_peer_id; } void close_connection(peer_connection const* p, error_code const& ec); void set_settings(session_settings const& s); session_settings const& settings() const { return m_settings; } #ifndef TORRENT_DISABLE_DHT void add_dht_node_name(std::pair const& node); void add_dht_node(udp::endpoint n); void add_dht_router(std::pair const& node); void set_dht_settings(dht_settings const& s); dht_settings const& get_dht_settings() const { return m_dht_settings; } void start_dht(); void stop_dht(); void start_dht(entry const& startup_state); // this is called for torrents when they are started // it will prioritize them for announcing to // the DHT, to get the initial peers quickly void prioritize_dht(boost::weak_ptr t); #ifndef TORRENT_NO_DEPRECATE entry dht_state() const; #endif void on_dht_announce(error_code const& e); void on_dht_router_name_lookup(error_code const& e , tcp::resolver::iterator host); #endif void maybe_update_udp_mapping(int nat, int local_port, int external_port); #ifndef TORRENT_DISABLE_ENCRYPTION void set_pe_settings(pe_settings const& settings); pe_settings const& get_pe_settings() const { return m_pe_settings; } #endif void on_port_map_log(char const* msg, int map_transport); void on_lsd_announce(error_code const& e); // called when a port mapping is successful, or a router returns // a failure to map a port void on_port_mapping(int mapping, address const& ip, int port , error_code const& ec, int nat_transport); bool is_aborted() const { return m_abort; } bool is_paused() const { return m_paused; } void pause(); void resume(); void set_ip_filter(ip_filter const& f); ip_filter const& get_ip_filter() const; void set_port_filter(port_filter const& f); void listen_on( std::pair const& port_range , error_code& ec , const char* net_interface = 0 , int flags = 0); bool is_listening() const; torrent_handle add_torrent(add_torrent_params const&, error_code& ec); torrent_handle add_torrent_impl(add_torrent_params const&, error_code& ec); void async_add_torrent(add_torrent_params* params); void remove_torrent(torrent_handle const& h, int options); void remove_torrent_impl(boost::shared_ptr tptr, int options); void get_torrent_status(std::vector* ret , boost::function const& pred , boost::uint32_t flags) const; void refresh_torrent_status(std::vector* ret , boost::uint32_t flags) const; void post_torrent_updates(); std::vector get_torrents() const; void queue_check_torrent(boost::shared_ptr const& t); void dequeue_check_torrent(boost::shared_ptr const& t); void set_alert_mask(boost::uint32_t m); size_t set_alert_queue_size_limit(size_t queue_size_limit_); std::auto_ptr pop_alert(); void pop_alerts(std::deque* alerts); void set_alert_dispatch(boost::function)> const&); void post_alert(const alert& alert_); alert const* wait_for_alert(time_duration max_wait); #ifndef TORRENT_NO_DEPRECATE int upload_rate_limit() const; int download_rate_limit() const; int local_upload_rate_limit() const; int local_download_rate_limit() const; void set_local_download_rate_limit(int bytes_per_second); void set_local_upload_rate_limit(int bytes_per_second); void set_download_rate_limit(int bytes_per_second); void set_upload_rate_limit(int bytes_per_second); void set_max_half_open_connections(int limit); void set_max_connections(int limit); void set_max_uploads(int limit); int max_connections() const; int max_uploads() const; int max_half_open_connections() const; #endif int num_uploads() const { return m_num_unchoked; } int num_connections() const { return m_connections.size(); } void unchoke_peer(peer_connection& c); void choke_peer(peer_connection& c); session_status status() const; 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; 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(lazy_entry const* e); void set_proxy(proxy_settings const& s); proxy_settings const& proxy() const { return m_proxy; } #ifndef TORRENT_NO_DEPRECATE void set_peer_proxy(proxy_settings const& s) { set_proxy(s); } void set_web_seed_proxy(proxy_settings const& s) { set_proxy(s); } void set_tracker_proxy(proxy_settings const& s) { set_proxy(s); } proxy_settings const& peer_proxy() const { return proxy(); } proxy_settings const& web_seed_proxy() const { return proxy(); } proxy_settings const& tracker_proxy() const { return proxy(); } #ifndef TORRENT_DISABLE_DHT void set_dht_proxy(proxy_settings const& s) { set_proxy(s); } proxy_settings const& dht_proxy() const { return proxy(); } #endif #endif // TORRENT_NO_DEPRECATE #ifndef TORRENT_DISABLE_DHT bool is_dht_running() const { return m_dht.get(); } #endif #if TORRENT_USE_I2P void set_i2p_proxy(proxy_settings const& s); void on_i2p_open(error_code const& ec); proxy_settings const& i2p_proxy() const { return m_i2p_conn.proxy(); } void open_new_incoming_i2p_connection(); void on_i2p_accept(boost::shared_ptr const& s , error_code const& e); #endif #ifndef TORRENT_DISABLE_GEO_IP std::string as_name_for_ip(address const& a); int as_for_ip(address const& a); std::pair* lookup_as(int as); void load_asnum_db(std::string file); bool has_asnum_db() const { return m_asnum_db; } void load_country_db(std::string file); bool has_country_db() const { return m_country_db; } char const* country_for_ip(address const& a); #if TORRENT_USE_WSTRING #ifndef TORRENT_NO_DEPRECATE void load_asnum_dbw(std::wstring file); void load_country_dbw(std::wstring file); #endif // TORRENT_NO_DEPRECATE #endif // TORRENT_USE_WSTRING #endif // TORRENT_DISABLE_GEO_IP 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(); void add_redundant_bytes(size_type b, int reason) { TORRENT_ASSERT(b > 0); m_total_redundant_bytes += b; m_redundant_bytes[reason] += b; } void add_failed_bytes(size_type b) { TORRENT_ASSERT(b > 0); m_total_failed_bytes += b; } char* allocate_buffer(); void free_buffer(char* buf); char* allocate_disk_buffer(char const* category); void free_disk_buffer(char* buf); enum { source_dht = 1, source_peer = 2, source_tracker = 4, source_router = 8 }; // implements dht_observer virtual void set_external_address(address const& ip , address const& source); void set_external_address(address const& ip , int source_type, address const& source); external_ip const& external_address() const; bool can_write_to_disk() const { return m_disk_thread.can_write(); } // used when posting synchronous function // calls to session_impl and torrent objects mutable libtorrent::mutex mut; mutable libtorrent::condition_variable cond; void inc_disk_queue(int channel) { TORRENT_ASSERT(channel >= 0 && channel < 2); ++m_disk_queues[channel]; } void dec_disk_queue(int channel) { TORRENT_ASSERT(channel >= 0 && channel < 2); TORRENT_ASSERT(m_disk_queues[channel] > 0); --m_disk_queues[channel]; } void inc_active_downloading() { ++m_num_active_downloading; } void dec_active_downloading() { TORRENT_ASSERT(m_num_active_downloading > 0); --m_num_active_downloading; } void inc_active_finished() { ++m_num_active_finished; } void dec_active_finished() { TORRENT_ASSERT(m_num_active_finished > 0); --m_num_active_finished; } #if TORRENT_USE_ASSERTS bool in_state_updates(boost::shared_ptr t) { return std::find_if(m_state_updates.begin(), m_state_updates.end() , boost::bind(&boost::weak_ptr::lock, _1) == t) != m_state_updates.end(); } #endif void add_to_update_queue(boost::weak_ptr t) { TORRENT_ASSERT(std::find_if(m_state_updates.begin(), m_state_updates.end() , boost::bind(&boost::weak_ptr::lock, _1) == t.lock()) == m_state_updates.end()); m_state_updates.push_back(t); } // private: // implements alert_dispatcher virtual bool post_alert(alert* a); void update_connections_limit(); void update_unchoke_limit(); void trigger_auto_manage(); void on_trigger_auto_manage(); void update_rate_settings(); void update_disk_thread_settings(); void on_lsd_peer(tcp::endpoint peer, sha1_hash const& ih); void setup_socket_buffers(socket_type& s); // the settings for the client session_settings m_settings; // this is a shared pool where policy_peer objects // are allocated. It's a pool since we're likely // to have tens of thousands of peers, and a pool // saves significant overhead #ifdef TORRENT_STATS struct logging_allocator { typedef std::size_t size_type; typedef std::ptrdiff_t difference_type; static char* malloc(const size_type bytes) { allocated_bytes += bytes; ++allocations; return (char*)::malloc(bytes); } static void free(char* const block) { --allocations; return ::free(block); } static int allocations; static int allocated_bytes; }; boost::object_pool< policy::ipv4_peer, logging_allocator> m_ipv4_peer_pool; #if TORRENT_USE_IPV6 boost::object_pool< policy::ipv6_peer, logging_allocator> m_ipv6_peer_pool; #endif #if TORRENT_USE_I2P boost::object_pool< policy::i2p_peer, logging_allocator> m_i2p_peer_pool; #endif #else boost::object_pool m_ipv4_peer_pool; #if TORRENT_USE_IPV6 boost::object_pool m_ipv6_peer_pool; #endif #if TORRENT_USE_I2P boost::object_pool m_i2p_peer_pool; #endif #endif // this vector is used to store the block_info // objects pointed to by partial_piece_info returned // by torrent::get_download_queue. std::vector 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 // the file pool that all storages in this session's // torrents uses. It sets a limit on the number of // open files by this session. // file pool must be destructed after the torrents // since they will still have references to it // when they are destructed. file_pool m_files; // 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 alert_manager m_alerts; // 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; // this is a list of half-open tcp connections // (only outgoing connections) // this has to be one of the last // members to be destructed connection_queue m_half_open; // 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 global rate limiter bandwidth channels bandwidth_channel m_download_channel; bandwidth_channel m_upload_channel; // bandwidth channels for local peers when // rate limits are ignored. They are only // throttled by these global rate limiters // and they don't have a rate limit set by // default bandwidth_channel m_local_download_channel; bandwidth_channel m_local_upload_channel; // 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. bandwidth_channel m_tcp_download_channel; bandwidth_channel m_tcp_upload_channel; bandwidth_channel* m_bandwidth_channel[2]; // the number of peer connections that are waiting // for the disk. one for each channel. // upload_channel means waiting to read from disk // and download_channel is waiting to write to disk int m_disk_queues[2]; tracker_manager m_tracker_manager; torrent_map m_torrents; std::map > m_uuids; // counters of how many of the active (non-paused) torrents // are finished and downloading. This is used to weigh the // priority of downloading and finished torrents when connecting // more peers. int m_num_active_downloading; int m_num_active_finished; typedef std::list > check_queue_t; // this has all torrents that wants to be checked in it check_queue_t m_queued_for_checking; // 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 > m_incoming_sockets; // 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 > m_undead_peers; // 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; // 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 ip-address of the interface // we are supposed to listen on. // if the ip is set to zero, it means // that we should let the os decide which // interface to listen on tcp::endpoint m_listen_interface; // 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 m_listen_sockets; #if TORRENT_USE_I2P i2p_connection m_i2p_conn; boost::shared_ptr m_i2p_listen_socket; #endif #ifdef TORRENT_USE_OPENSSL void ssl_handshake(error_code const& ec, boost::shared_ptr s); #endif // when as a socks proxy is used for peers, also // listen for incoming connections on a socks connection boost::shared_ptr m_socks_listen_socket; boost::uint16_t m_socks_listen_port; void open_new_incoming_socks_connection(); void setup_listener(listen_socket_t* s, tcp::endpoint ep, int& retries , bool v6_only, int flags, error_code& ec); // the proxy used for bittorrent proxy_settings m_proxy; #ifndef TORRENT_DISABLE_DHT entry m_dht_state; #endif // the number of unchoked peers as set by the auto-unchoker // this should always be >= m_max_uploads int m_allowed_upload_slots; // the number of unchoked peers int m_num_unchoked; // 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. int m_unchoke_time_scaler; // this is used to decide when to recalculate which // torrents to keep queued and which to activate 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. 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; // statistics gathered from all torrents. stat m_stat; int m_peak_up_rate; int m_peak_down_rate; void on_disk_queue(); void on_tick(error_code const& e); void try_connect_more_peers(int num_downloads, int num_downloads_peers); void auto_manage_torrents(std::vector& list , int& dht_limit, int& tracker_limit, int& lsd_limit , int& hard_limit, int type_limit); void recalculate_auto_managed_torrents(); void recalculate_unchoke_slots(int congested_torrents , int uncongested_torrents); void recalculate_optimistic_unchoke_slots(); ptime m_created; int session_time() const { return total_seconds(time_now() - m_created); } ptime m_last_tick; ptime m_last_second_tick; // used to limit how often disk warnings are generated ptime m_last_disk_performance_warning; ptime m_last_disk_queue_performance_warning; // the last time we went through the peers // to decide which ones to choke/unchoke ptime m_last_choke; // the time when the next rss feed needs updating ptime m_next_rss_update; // update any rss feeds that need updating and // recalculate m_next_rss_update void update_rss_feeds(); // when outgoing_ports is configured, this is the // port we'll bind the next outgoing socket to int m_next_port; #ifndef TORRENT_DISABLE_DHT boost::intrusive_ptr m_dht; dht_settings m_dht_settings; // these are used when starting the DHT // (and bootstrapping it), and then erased std::list 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; utp_socket_manager m_utp_socket_manager; // the number of torrent connection boosts // connections that have been made this second // this is deducted from the connect speed int m_boost_connections; #ifndef TORRENT_DISABLE_ENCRYPTION pe_settings m_pe_settings; #endif boost::intrusive_ptr m_natpmp; boost::intrusive_ptr m_upnp; boost::intrusive_ptr 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_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 > m_dht_torrents; #endif // torrents prioritized to get connection attempts std::deque, int> > m_prio_torrents; // this announce timer is used // by Local service discovery deadline_timer m_lsd_announce_timer; tcp::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. torrent_map::iterator m_next_connect_torrent; // this is the number of attempts of connecting to // peers we have given to the torrent pointed to // by m_next_connect_torrent. Once this reaches // the number of connection attempts this particular // torrent should have, the counter is reset and // m_next_connect_torrent takes a step forward // to give the next torrent its connection attempts. int m_current_connect_attempts; // this is the round-robin cursor for peers that // get to download again after the disk has been // blocked connection_map::iterator m_next_disk_peer; #if TORRENT_USE_INVARIANT_CHECKS void check_invariant() const; #endif #ifdef TORRENT_DISK_STATS void log_buffer_usage(); // used to log send buffer usage statistics std::ofstream m_buffer_usage_logger; // the number of send buffers that are allocated int m_buffer_allocations; #endif #ifdef TORRENT_REQUEST_LOGGING // used to log all requests from peers FILE* m_request_log; #endif #ifdef TORRENT_STATS void rotate_stats_log(); void print_log_line(int tick_interval_ms, ptime now); void reset_stat_counters(); void enable_stats_logging(bool s); bool m_stats_logging_enabled; // the last time we rotated the log file ptime m_last_log_rotation; // logger used to write bandwidth usage statistics FILE* m_stats_logger; // sequence number for log file. Log files are // rotated every hour and the sequence number is // incremented by one int m_log_seq; // the number of peers that were disconnected this // tick due to protocol error int m_error_peers; int m_disconnected_peers; int m_eof_peers; int m_connreset_peers; int m_connrefused_peers; int m_connaborted_peers; int m_perm_peers; int m_buffer_peers; int m_unreachable_peers; int m_broken_pipe_peers; int m_addrinuse_peers; int m_no_access_peers; int m_invalid_arg_peers; int m_aborted_peers; int m_piece_requests; int m_max_piece_requests; int m_invalid_piece_requests; int m_choked_piece_requests; int m_cancelled_piece_requests; int m_piece_rejects; int m_error_incoming_peers; int m_error_outgoing_peers; int m_error_rc4_peers; int m_error_encrypted_peers; int m_error_tcp_peers; int m_error_utp_peers; // the number of times the piece picker fell through // to the end-game mode int m_end_game_piece_picker_blocks; int m_piece_picker_blocks; int m_piece_picks; int m_reject_piece_picks; int m_unchoke_piece_picks; int m_incoming_redundant_piece_picks; int m_incoming_piece_picks; int m_end_game_piece_picks; int m_snubbed_piece_picks; int m_connect_timeouts; int m_uninteresting_peers; int m_timeout_peers; int m_no_memory_peers; int m_too_many_peers; int m_transport_timeout_peers; cache_status m_last_cache_status; size_type m_last_failed; size_type m_last_redundant; size_type m_last_uploaded; size_type m_last_downloaded; int m_connection_attempts; int m_num_banned_peers; int m_banned_for_hash_failure; vm_statistics_data_t m_last_vm_stat; thread_cpu_usage m_network_thread_cpu_usage; sliding_average<20> m_read_ops; sliding_average<20> m_write_ops;; enum { on_read_counter, on_write_counter, on_tick_counter, on_lsd_counter, on_lsd_peer_counter, on_udp_counter, on_accept_counter, on_disk_queue_counter, on_disk_read_counter, on_disk_write_counter, max_messages }; int m_num_messages[max_messages]; // 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, // 16384, 32768, 65536, 131072, 262144, 524288, 1048576 int m_send_buffer_sizes[18]; int m_recv_buffer_sizes[18]; #endif // 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; // the number of torrents that have apply_ip_filter // set to false. This is typically 0 int m_non_filtered_torrents; #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING boost::shared_ptr create_log(std::string const& name , int instance, bool append = true); void session_log(char const* fmt, ...) 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 > m_tracker_loggers; std::string get_log_path() const { return m_logpath; } std::string m_logpath; private: #endif #ifdef TORRENT_UPNP_LOGGING std::ofstream m_upnp_log; #endif // state for keeping track of external IPs external_ip m_external_ip; #ifndef TORRENT_DISABLE_EXTENSIONS typedef std::list > ses_extension_list_t; ses_extension_list_t m_ses_extensions; #endif #ifndef TORRENT_DISABLE_GEO_IP GeoIP* m_asnum_db; GeoIP* m_country_db; // maps AS number to the peak download rate // we've seen from it. Entries are never removed // from this map. Pointers to its elements // are kept in the policy::peer structures. std::map m_as_peak; #endif // total redundant and failed bytes size_type m_total_failed_bytes; size_type m_total_redundant_bytes; // 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; // is false by default and set to true when // the first incoming connection is established // this is used to know if the client is behind // NAT or not. bool m_incoming_connection; // redundant bytes per category size_type m_redundant_bytes[7]; std::vector > m_feeds; // this is the set of (subscribed) torrents that have changed // their states since the last time the user requested updates. std::vector > m_state_updates; // the main working thread boost::scoped_ptr m_thread; #if TORRENT_USE_ASSERTS && defined BOOST_HAS_PTHREADS pthread_t m_network_thread; #endif }; #if defined TORRENT_VERBOSE_LOGGING || defined TORRENT_LOGGING || defined TORRENT_ERROR_LOGGING struct tracker_logger : request_callback { tracker_logger(session_impl& 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
const& ip_list , std::vector& peers , int interval , int min_interval , int complete , int incomplete , int downloaded , address const& external_ip , std::string const& tracker_id); 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_impl& m_ses; }; #endif } } #endif