// This file Copyright © 2008-2022 Mnemosyne LLC. // It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only), // or any future license endorsed by Mnemosyne LLC. // License text can be found in the licenses/ folder. #include // std::partial_sort(), std::min(), std::max() #include /* INT_MAX */ #include #include #include #include // atoi() #include #include #include // for std::back_inserter #include #include #include // for std::accumulate() #include #include #include #include #include #ifndef _WIN32 #include /* umask() */ #include /* umask() */ #endif #include #include #include #include // fmt::ptr #include "transmission.h" #include "announcer.h" #include "bandwidth.h" #include "blocklist.h" #include "cache.h" #include "crypto-utils.h" #include "error-types.h" #include "error.h" #include "file.h" #include "log.h" #include "net.h" #include "peer-io.h" #include "peer-mgr.h" #include "port-forwarding.h" #include "rpc-server.h" #include "session-id.h" #include "session.h" #include "timer-ev.h" #include "torrent.h" #include "tr-assert.h" #include "tr-lpd.h" #include "tr-strbuf.h" #include "tr-utp.h" #include "utils.h" #include "variant.h" #include "verify.h" #include "version.h" #include "web.h" using namespace std::literals; namespace { namespace bandwidth_group_helpers { auto constexpr BandwidthGroupsFilename = "bandwidth-groups.json"sv; void bandwidthGroupRead(tr_session* session, std::string_view config_dir) { auto const filename = tr_pathbuf{ config_dir, '/', BandwidthGroupsFilename }; auto groups_dict = tr_variant{}; if (!tr_sys_path_exists(filename) || !tr_variantFromFile(&groups_dict, TR_VARIANT_PARSE_JSON, filename, nullptr) || !tr_variantIsDict(&groups_dict)) { return; } auto idx = size_t{ 0 }; auto key = tr_quark{}; tr_variant* dict = nullptr; while (tr_variantDictChild(&groups_dict, idx, &key, &dict)) { ++idx; auto name = tr_interned_string(key); auto& group = session->getBandwidthGroup(name); auto limits = tr_bandwidth_limits{}; tr_variantDictFindBool(dict, TR_KEY_uploadLimited, &limits.up_limited); tr_variantDictFindBool(dict, TR_KEY_downloadLimited, &limits.down_limited); if (auto limit = int64_t{}; tr_variantDictFindInt(dict, TR_KEY_uploadLimit, &limit)) { limits.up_limit_KBps = static_cast(limit); } if (auto limit = int64_t{}; tr_variantDictFindInt(dict, TR_KEY_downloadLimit, &limit)) { limits.down_limit_KBps = static_cast(limit); } group.setLimits(&limits); if (auto honors = bool{}; tr_variantDictFindBool(dict, TR_KEY_honorsSessionLimits, &honors)) { group.honorParentLimits(TR_UP, honors); group.honorParentLimits(TR_DOWN, honors); } } tr_variantClear(&groups_dict); } int bandwidthGroupWrite(tr_session const* session, std::string_view config_dir) { auto const& groups = session->bandwidthGroups(); auto groups_dict = tr_variant{}; tr_variantInitDict(&groups_dict, std::size(groups)); for (auto const& [name, group] : groups) { auto const limits = group->getLimits(); auto* const dict = tr_variantDictAddDict(&groups_dict, name.quark(), 5); tr_variantDictAddStrView(dict, TR_KEY_name, name.sv()); tr_variantDictAddBool(dict, TR_KEY_uploadLimited, limits.up_limited); tr_variantDictAddInt(dict, TR_KEY_uploadLimit, limits.up_limit_KBps); tr_variantDictAddBool(dict, TR_KEY_downloadLimited, limits.down_limited); tr_variantDictAddInt(dict, TR_KEY_downloadLimit, limits.down_limit_KBps); tr_variantDictAddBool(dict, TR_KEY_honorsSessionLimits, group->areParentLimitsHonored(TR_UP)); } auto const filename = tr_pathbuf{ config_dir, '/', BandwidthGroupsFilename }; auto const ret = tr_variantToFile(&groups_dict, TR_VARIANT_FMT_JSON, filename); tr_variantClear(&groups_dict); return ret; } } // namespace bandwidth_group_helpers void update_bandwidth(tr_session* session, tr_direction dir) { if (auto const limit_bytes_per_second = session->activeSpeedLimitBps(dir); limit_bytes_per_second) { session->top_bandwidth_.setLimited(dir, *limit_bytes_per_second > 0U); session->top_bandwidth_.setDesiredSpeedBytesPerSecond(dir, *limit_bytes_per_second); } else { session->top_bandwidth_.setLimited(dir, false); } } } // namespace tr_port tr_session::randomPort() const { auto const lower = std::min(settings_.peer_port_random_low.host(), settings_.peer_port_random_high.host()); auto const upper = std::max(settings_.peer_port_random_low.host(), settings_.peer_port_random_high.host()); auto const range = upper - lower; return tr_port::fromHost(lower + tr_rand_int(range + 1U)); } /* Generate a peer id : "-TRxyzb-" + 12 random alphanumeric characters, where x is the major version number, y is the minor version number, z is the maintenance number, and b designates beta (Azureus-style) */ tr_peer_id_t tr_peerIdInit() { auto peer_id = tr_peer_id_t{}; auto* it = std::data(peer_id); // starts with -TRXXXX- auto constexpr Prefix = std::string_view{ PEERID_PREFIX }; auto const* const end = it + std::size(peer_id); it = std::copy_n(std::data(Prefix), std::size(Prefix), it); // remainder is randomly-generated characters auto constexpr Pool = std::string_view{ "0123456789abcdefghijklmnopqrstuvwxyz" }; auto total = int{ 0 }; tr_rand_buffer(it, end - it); while (it + 1 < end) { int const val = *it % std::size(Pool); total += val; *it++ = Pool[val]; } int const val = total % std::size(Pool) != 0 ? std::size(Pool) - total % std::size(Pool) : 0; *it = Pool[val]; return peer_id; } // --- std::vector tr_session::DhtMediator::torrentsAllowingDHT() const { auto ids = std::vector{}; auto const& torrents = session_.torrents(); ids.reserve(std::size(torrents)); for (auto const* const tor : torrents) { if (tor->isRunning && tor->allowsDht()) { ids.push_back(tor->id()); } } return ids; } tr_sha1_digest_t tr_session::DhtMediator::torrentInfoHash(tr_torrent_id_t id) const { if (auto const* const tor = session_.torrents().get(id); tor != nullptr) { return tor->infoHash(); } return {}; } void tr_session::DhtMediator::addPex(tr_sha1_digest_t const& info_hash, tr_pex const* pex, size_t n_pex) { if (auto* const tor = session_.torrents().get(info_hash); tor != nullptr) { tr_peerMgrAddPex(tor, TR_PEER_FROM_DHT, pex, n_pex); } } // --- bool tr_session::LpdMediator::onPeerFound(std::string_view info_hash_str, tr_address address, tr_port port) { auto const digest = tr_sha1_from_string(info_hash_str); if (!digest) { return false; } tr_torrent* const tor = session_.torrents_.get(*digest); if (!tr_isTorrent(tor) || !tor->allowsLpd()) { return false; } // we found a suitable peer, add it to the torrent auto pex = tr_pex{ address, port }; tr_peerMgrAddPex(tor, TR_PEER_FROM_LPD, &pex, 1U); tr_logAddDebugTor(tor, fmt::format(FMT_STRING("Found a local peer from LPD ({:s})"), address.display_name(port))); return true; } std::vector tr_session::LpdMediator::torrents() const { auto ret = std::vector{}; ret.reserve(std::size(session_.torrents())); for (auto const* const tor : session_.torrents()) { auto info = tr_lpd::Mediator::TorrentInfo{}; info.info_hash_str = tor->infoHashString(); info.activity = tor->activity(); info.allows_lpd = tor->allowsLpd(); info.announce_after = tor->lpdAnnounceAt; ret.emplace_back(info); } return ret; } void tr_session::LpdMediator::setNextAnnounceTime(std::string_view info_hash_str, time_t announce_after) { if (auto digest = tr_sha1_from_string(info_hash_str); digest) { if (tr_torrent* const tor = session_.torrents_.get(*digest); tr_isTorrent(tor)) { tor->lpdAnnounceAt = announce_after; } } } // --- std::optional tr_session::WebMediator::cookieFile() const { auto const path = tr_pathbuf{ session_->configDir(), "/cookies.txt"sv }; if (!tr_sys_path_exists(path)) { return {}; } return std::string{ path }; } std::optional tr_session::WebMediator::userAgent() const { return TR_NAME "/" SHORT_VERSION_STRING; } std::optional tr_session::WebMediator::publicAddressV4() const { if (auto const [addr, is_any] = session_->publicAddress(TR_AF_INET); !is_any) { return addr.display_name(); } return std::nullopt; } std::optional tr_session::WebMediator::publicAddressV6() const { if (auto const [addr, is_any] = session_->publicAddress(TR_AF_INET6); !is_any) { return addr.display_name(); } return std::nullopt; } size_t tr_session::WebMediator::clamp(int torrent_id, size_t byte_count) const { auto const lock = session_->unique_lock(); auto const* const tor = session_->torrents().get(torrent_id); return tor == nullptr ? 0U : tor->bandwidth_.clamp(TR_DOWN, byte_count); } void tr_session::WebMediator::notifyBandwidthConsumed(int torrent_id, size_t byte_count) { auto const lock = session_->unique_lock(); if (auto* const tor = session_->torrents().get(torrent_id); tor != nullptr) { tor->bandwidth_.notifyBandwidthConsumed(TR_DOWN, byte_count, true, tr_time_msec()); } } void tr_session::WebMediator::run(tr_web::FetchDoneFunc&& func, tr_web::FetchResponse&& response) const { session_->runInSessionThread(std::move(func), std::move(response)); } time_t tr_session::WebMediator::now() const { return tr_time(); } void tr_sessionFetch(tr_session* session, tr_web::FetchOptions&& options) { session->fetch(std::move(options)); } // --- tr_encryption_mode tr_sessionGetEncryption(tr_session const* session) { TR_ASSERT(session != nullptr); return session->encryptionMode(); } void tr_sessionSetEncryption(tr_session* session, tr_encryption_mode mode) { TR_ASSERT(session != nullptr); TR_ASSERT(mode == TR_ENCRYPTION_PREFERRED || mode == TR_ENCRYPTION_REQUIRED || mode == TR_CLEAR_PREFERRED); session->settings_.encryption_mode = mode; } // --- void tr_session::onIncomingPeerConnection(tr_socket_t fd, void* vsession) { auto* session = static_cast(vsession); if (auto const incoming_info = tr_netAccept(session, fd); incoming_info) { auto const& [addr, port, sock] = *incoming_info; tr_logAddTrace(fmt::format("new incoming connection {} ({})", sock, addr.display_name(port))); session->addIncoming(tr_peer_socket{ session, addr, port, sock }); } } tr_session::BoundSocket::BoundSocket( event_base* evbase, tr_address const& addr, tr_port port, IncomingCallback cb, void* cb_data) : cb_{ cb } , cb_data_{ cb_data } , socket_{ tr_netBindTCP(addr, port, false) } , ev_{ event_new(evbase, socket_, EV_READ | EV_PERSIST, &BoundSocket::onCanRead, this) } { if (socket_ == TR_BAD_SOCKET) { return; } tr_logAddInfo( fmt::format(_("Listening to incoming peer connections on {hostport}"), fmt::arg("hostport", addr.display_name(port)))); event_add(ev_.get(), nullptr); } tr_session::BoundSocket::~BoundSocket() { ev_.reset(); if (socket_ != TR_BAD_SOCKET) { tr_net_close_socket(socket_); socket_ = TR_BAD_SOCKET; } } tr_session::PublicAddressResult tr_session::publicAddress(tr_address_type type) const noexcept { if (type == TR_AF_INET) { // if user provided an address, use it. // otherwise, use any_ipv4 (0.0.0.0). static auto constexpr DefaultAddr = tr_address::any_ipv4(); auto addr = tr_address::from_string(settings_.bind_address_ipv4).value_or(DefaultAddr); return { addr, addr == DefaultAddr }; } if (type == TR_AF_INET6) { // if user provided an address, use it. // otherwise, if we can determine which one to use via tr_globalIPv6 magic, use it. // otherwise, use any_ipv6 (::). static auto constexpr AnyAddr = tr_address::any_ipv6(); auto const default_addr = tr_globalIPv6().value_or(AnyAddr); auto addr = tr_address::from_string(settings_.bind_address_ipv6).value_or(default_addr); return { addr, addr == AnyAddr }; } TR_ASSERT_MSG(false, "invalid type"); return {}; } // --- namespace { namespace settings_helpers { void get_settings_filename(tr_pathbuf& setme, char const* config_dir, char const* appname) { if (!tr_str_is_empty(config_dir)) { setme.assign(std::string_view{ config_dir }, "/settings.json"sv); return; } auto const default_config_dir = tr_getDefaultConfigDir(appname); setme.assign(std::string_view{ default_config_dir }, "/settings.json"sv); } } // namespace settings_helpers } // namespace void tr_sessionGetDefaultSettings(tr_variant* setme_dictionary) { tr_session_settings{}.save(setme_dictionary); tr_rpc_server::defaultSettings(setme_dictionary); tr_session_alt_speeds::defaultSettings(setme_dictionary); } void tr_sessionGetSettings(tr_session const* session, tr_variant* setme_dictionary) { session->settings_.save(setme_dictionary); session->alt_speeds_.save(setme_dictionary); session->rpc_server_->save(setme_dictionary); tr_variantDictRemove(setme_dictionary, TR_KEY_message_level); tr_variantDictAddInt(setme_dictionary, TR_KEY_message_level, tr_logGetLevel()); } bool tr_sessionLoadSettings(tr_variant* dict, char const* config_dir, char const* app_name) { using namespace settings_helpers; TR_ASSERT(tr_variantIsDict(dict)); /* initializing the defaults: caller may have passed in some app-level defaults. * preserve those and use the session defaults to fill in any missing gaps. */ auto old_dict = *dict; tr_variantInitDict(dict, 0); tr_sessionGetDefaultSettings(dict); tr_variantMergeDicts(dict, &old_dict); tr_variantClear(&old_dict); /* file settings override the defaults */ auto success = bool{}; auto filename = tr_pathbuf{}; get_settings_filename(filename, config_dir, app_name); if (!tr_sys_path_exists(filename)) { success = true; } else if (auto file_settings = tr_variant{}; tr_variantFromFile(&file_settings, TR_VARIANT_PARSE_JSON, filename)) { tr_variantMergeDicts(dict, &file_settings); tr_variantClear(&file_settings); success = true; } else { success = false; } /* cleanup */ return success; } void tr_sessionSaveSettings(tr_session* session, char const* config_dir, tr_variant const* client_settings) { using namespace bandwidth_group_helpers; TR_ASSERT(tr_variantIsDict(client_settings)); tr_variant settings; auto const filename = tr_pathbuf{ config_dir, "/settings.json"sv }; tr_variantInitDict(&settings, 0); /* the existing file settings are the fallback values */ if (auto file_settings = tr_variant{}; tr_variantFromFile(&file_settings, TR_VARIANT_PARSE_JSON, filename)) { tr_variantMergeDicts(&settings, &file_settings); tr_variantClear(&file_settings); } /* the client's settings override the file settings */ tr_variantMergeDicts(&settings, client_settings); /* the session's true values override the file & client settings */ { auto session_settings = tr_variant{}; tr_variantInitDict(&session_settings, 0); tr_sessionGetSettings(session, &session_settings); tr_variantMergeDicts(&settings, &session_settings); tr_variantClear(&session_settings); } /* save the result */ tr_variantToFile(&settings, TR_VARIANT_FMT_JSON, filename); /* cleanup */ tr_variantClear(&settings); /* Write bandwidth groups limits to file */ bandwidthGroupWrite(session, config_dir); } // --- struct tr_session::init_data { bool message_queuing_enabled; std::string_view config_dir; tr_variant* client_settings; std::condition_variable_any done_cv; }; tr_session* tr_sessionInit(char const* config_dir, bool message_queueing_enabled, tr_variant* client_settings) { using namespace bandwidth_group_helpers; TR_ASSERT(tr_variantIsDict(client_settings)); tr_timeUpdate(time(nullptr)); /* initialize the bare skeleton of the session object */ auto* const session = new tr_session{ config_dir }; bandwidthGroupRead(session, config_dir); // nice to start logging at the very beginning if (auto val = int64_t{}; tr_variantDictFindInt(client_settings, TR_KEY_message_level, &val)) { tr_logSetLevel(static_cast(val)); } auto data = tr_session::init_data{}; data.config_dir = config_dir; data.message_queuing_enabled = message_queueing_enabled; data.client_settings = client_settings; // run initImpl() in the libtransmission thread auto lock = session->unique_lock(); session->runInSessionThread([&session, &data]() { session->initImpl(data); }); data.done_cv.wait(lock); // wait for the session to be ready return session; } void tr_session::onNowTimer() { TR_ASSERT(now_timer_); auto const now = std::chrono::system_clock::now(); // tr_session upkeep tasks to perform once per second tr_timeUpdate(std::chrono::system_clock::to_time_t(now)); alt_speeds_.checkScheduler(); // set the timer to kick again right after (10ms after) the next second auto const target_time = std::chrono::time_point_cast(now) + 1s + 10ms; auto target_interval = target_time - now; if (target_interval < 100ms) { target_interval += 1s; } now_timer_->setInterval(std::chrono::duration_cast(target_interval)); } void tr_session::initImpl(init_data& data) { auto lock = unique_lock(); TR_ASSERT(amInSessionThread()); auto* const client_settings = data.client_settings; TR_ASSERT(tr_variantIsDict(client_settings)); tr_logAddTrace(fmt::format("tr_sessionInit: the session's top-level bandwidth object is {}", fmt::ptr(&top_bandwidth_))); auto settings = tr_variant{}; tr_variantInitDict(&settings, 0); tr_sessionGetDefaultSettings(&settings); tr_variantMergeDicts(&settings, client_settings); #ifndef _WIN32 /* Don't exit when writing on a broken socket */ (void)signal(SIGPIPE, SIG_IGN); #endif tr_logSetQueueEnabled(data.message_queuing_enabled); this->blocklists_ = libtransmission::Blocklist::loadBlocklists(blocklist_dir_, useBlocklist()); tr_logAddInfo(fmt::format(_("Transmission version {version} starting"), fmt::arg("version", LONG_VERSION_STRING))); setSettings(client_settings, true); if (this->allowsLPD()) { this->lpd_ = tr_lpd::create(lpd_mediator_, eventBase()); } tr_utpInit(this); /* cleanup */ tr_variantClear(&settings); data.done_cv.notify_one(); } void tr_session::setSettings(tr_variant* settings_dict, bool force) { TR_ASSERT(amInSessionThread()); TR_ASSERT(tr_variantIsDict(settings_dict)); // load the session settings auto new_settings = tr_session_settings{}; new_settings.load(settings_dict); setSettings(std::move(new_settings), force); // delegate loading out the other settings alt_speeds_.load(settings_dict); rpc_server_->load(settings_dict); } void tr_session::setSettings(tr_session_settings&& settings_in, bool force) { auto const lock = unique_lock(); std::swap(settings_, settings_in); auto const& new_settings = settings_; auto const& old_settings = settings_in; // the rest of the func is session_ responding to settings changes if (auto const& val = new_settings.log_level; force || val != old_settings.log_level) { tr_logSetLevel(val); } #ifndef _WIN32 if (auto const& val = new_settings.umask; force || val != old_settings.umask) { ::umask(val); } #endif if (auto const& val = new_settings.cache_size_mb; force || val != old_settings.cache_size_mb) { tr_sessionSetCacheLimit_MB(this, val); } if (auto const& val = new_settings.default_trackers_str; force || val != old_settings.default_trackers_str) { setDefaultTrackers(val); } if (auto const& val = new_settings.utp_enabled; force || val != old_settings.utp_enabled) { tr_sessionSetUTPEnabled(this, val); } useBlocklist(new_settings.blocklist_enabled); auto local_peer_port = force && settings_.peer_port_random_on_start ? randomPort() : new_settings.peer_port; bool port_changed = false; if (force || local_peer_port_ != local_peer_port) { local_peer_port_ = local_peer_port; advertised_peer_port_ = local_peer_port; port_changed = true; } bool addr_changed = false; if (new_settings.tcp_enabled) { if (auto const& val = new_settings.bind_address_ipv4; force || port_changed || val != old_settings.bind_address_ipv4) { auto const [addr, is_default] = publicAddress(TR_AF_INET); bound_ipv4_.emplace(eventBase(), addr, local_peer_port_, &tr_session::onIncomingPeerConnection, this); addr_changed = true; } if (auto const& val = new_settings.bind_address_ipv6; force || port_changed || val != old_settings.bind_address_ipv6) { auto const [addr, is_default] = publicAddress(TR_AF_INET6); bound_ipv6_.emplace(eventBase(), addr, local_peer_port_, &tr_session::onIncomingPeerConnection, this); addr_changed = true; } } else { bound_ipv4_.reset(); bound_ipv6_.reset(); addr_changed = true; } if (auto const& val = new_settings.port_forwarding_enabled; force || val != old_settings.port_forwarding_enabled) { tr_sessionSetPortForwardingEnabled(this, val); } if (port_changed) { port_forwarding_->localPortChanged(); } bool const dht_changed = new_settings.dht_enabled != old_settings.dht_enabled; if (!udp_core_ || force || port_changed || dht_changed) { udp_core_ = std::make_unique(*this, udpPort()); } // Sends out announce messages with advertisedPeerPort(), so this // section neesd be happen here after the peer port settings changes if (auto const& val = new_settings.lpd_enabled; force || val != old_settings.lpd_enabled) { if (val) { lpd_ = tr_lpd::create(lpd_mediator_, eventBase()); } else { lpd_.reset(); } } if (!allowsDHT()) { dht_.reset(); } else if (force || !dht_ || port_changed || addr_changed || dht_changed) { dht_ = tr_dht::create(dht_mediator_, localPeerPort(), udp_core_->socket4(), udp_core_->socket6()); } // We need to update bandwidth if speed settings changed. // It's a harmless call, so just call it instead of checking for settings changes update_bandwidth(this, TR_UP); update_bandwidth(this, TR_DOWN); } void tr_sessionSet(tr_session* session, tr_variant* settings) { // do the work in the session thread auto done_promise = std::promise{}; auto done_future = done_promise.get_future(); session->runInSessionThread( [&session, &settings, &done_promise]() { session->setSettings(settings, false); done_promise.set_value(); }); done_future.wait(); } // --- void tr_sessionSetDownloadDir(tr_session* session, char const* dir) { TR_ASSERT(session != nullptr); session->setDownloadDir(dir != nullptr ? dir : ""); } char const* tr_sessionGetDownloadDir(tr_session const* session) { TR_ASSERT(session != nullptr); return session->downloadDir().c_str(); } char const* tr_sessionGetConfigDir(tr_session const* session) { TR_ASSERT(session != nullptr); return session->configDir().c_str(); } // --- void tr_sessionSetIncompleteFileNamingEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->settings_.is_incomplete_file_naming_enabled = enabled; } bool tr_sessionIsIncompleteFileNamingEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->isIncompleteFileNamingEnabled(); } // --- void tr_sessionSetIncompleteDir(tr_session* session, char const* dir) { TR_ASSERT(session != nullptr); session->setIncompleteDir(dir != nullptr ? dir : ""); } char const* tr_sessionGetIncompleteDir(tr_session const* session) { TR_ASSERT(session != nullptr); return session->incompleteDir().c_str(); } void tr_sessionSetIncompleteDirEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->useIncompleteDir(enabled); } bool tr_sessionIsIncompleteDirEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->useIncompleteDir(); } // --- Peer Port void tr_sessionSetPeerPort(tr_session* session, uint16_t hport) { TR_ASSERT(session != nullptr); if (auto const port = tr_port::fromHost(hport); port != session->localPeerPort()) { session->runInSessionThread( [session, port]() { auto settings = session->settings_; settings.peer_port = port; session->setSettings(std::move(settings), false); }); } } uint16_t tr_sessionGetPeerPort(tr_session const* session) { return session != nullptr ? session->localPeerPort().host() : 0U; } uint16_t tr_sessionSetPeerPortRandom(tr_session* session) { auto const p = session->randomPort(); tr_sessionSetPeerPort(session, p.host()); return p.host(); } void tr_sessionSetPeerPortRandomOnStart(tr_session* session, bool random) { TR_ASSERT(session != nullptr); session->settings_.peer_port_random_on_start = random; } bool tr_sessionGetPeerPortRandomOnStart(tr_session const* session) { TR_ASSERT(session != nullptr); return session->isPortRandom(); } tr_port_forwarding_state tr_sessionGetPortForwarding(tr_session const* session) { TR_ASSERT(session != nullptr); return session->port_forwarding_->state(); } void tr_session::onAdvertisedPeerPortChanged() { for (auto* const tor : torrents()) { tr_torrentChangeMyPort(tor); } } // --- void tr_sessionSetRatioLimited(tr_session* session, bool is_limited) { TR_ASSERT(session != nullptr); session->settings_.ratio_limit_enabled = is_limited; } void tr_sessionSetRatioLimit(tr_session* session, double desired_ratio) { TR_ASSERT(session != nullptr); session->settings_.ratio_limit = desired_ratio; } bool tr_sessionIsRatioLimited(tr_session const* session) { TR_ASSERT(session != nullptr); return session->isRatioLimited(); } double tr_sessionGetRatioLimit(tr_session const* session) { TR_ASSERT(session != nullptr); return session->desiredRatio(); } // --- void tr_sessionSetIdleLimited(tr_session* session, bool is_limited) { TR_ASSERT(session != nullptr); session->settings_.idle_seeding_limit_enabled = is_limited; } void tr_sessionSetIdleLimit(tr_session* session, uint16_t idle_minutes) { TR_ASSERT(session != nullptr); session->settings_.idle_seeding_limit_minutes = idle_minutes; } bool tr_sessionIsIdleLimited(tr_session const* session) { TR_ASSERT(session != nullptr); return session->isIdleLimited(); } uint16_t tr_sessionGetIdleLimit(tr_session const* session) { TR_ASSERT(session != nullptr); return session->idleLimitMinutes(); } // --- Speed limits std::optional tr_session::activeSpeedLimitBps(tr_direction dir) const noexcept { if (tr_sessionUsesAltSpeed(this)) { return tr_toSpeedBytes(tr_sessionGetAltSpeed_KBps(this, dir)); } if (this->isSpeedLimited(dir)) { return tr_toSpeedBytes(tr_sessionGetSpeedLimit_KBps(this, dir)); } return {}; } time_t tr_session::AltSpeedMediator::time() { return tr_time(); } void tr_session::AltSpeedMediator::isActiveChanged(bool is_active, tr_session_alt_speeds::ChangeReason reason) { auto const in_session_thread = [session = &session_, is_active, reason]() { update_bandwidth(session, TR_UP); update_bandwidth(session, TR_DOWN); if (session->alt_speed_active_changed_func_ != nullptr) { session->alt_speed_active_changed_func_( session, is_active, reason == tr_session_alt_speeds::ChangeReason::User, session->alt_speed_active_changed_func_user_data_); } }; session_.runInSessionThread(in_session_thread); } // --- Session primary speed limits void tr_sessionSetSpeedLimit_KBps(tr_session* session, tr_direction dir, tr_kilobytes_per_second_t limit) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); if (dir == TR_DOWN) { session->settings_.speed_limit_down = limit; } else { session->settings_.speed_limit_up = limit; } update_bandwidth(session, dir); } tr_kilobytes_per_second_t tr_sessionGetSpeedLimit_KBps(tr_session const* session, tr_direction dir) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); return dir == TR_DOWN ? session->settings_.speed_limit_down : session->settings_.speed_limit_up; } void tr_sessionLimitSpeed(tr_session* session, tr_direction dir, bool limited) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); if (dir == TR_DOWN) { session->settings_.speed_limit_down_enabled = limited; } else { session->settings_.speed_limit_up_enabled = limited; } update_bandwidth(session, dir); } bool tr_sessionIsSpeedLimited(tr_session const* session, tr_direction dir) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); return session->isSpeedLimited(dir); } // --- Session alt speed limits void tr_sessionSetAltSpeed_KBps(tr_session* session, tr_direction dir, tr_kilobytes_per_second_t limit) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); session->alt_speeds_.setLimitKBps(dir, limit); update_bandwidth(session, dir); } tr_kilobytes_per_second_t tr_sessionGetAltSpeed_KBps(tr_session const* session, tr_direction dir) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); return session->alt_speeds_.limitKBps(dir); } void tr_sessionUseAltSpeedTime(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->alt_speeds_.setSchedulerEnabled(enabled); } bool tr_sessionUsesAltSpeedTime(tr_session const* session) { TR_ASSERT(session != nullptr); return session->alt_speeds_.isSchedulerEnabled(); } void tr_sessionSetAltSpeedBegin(tr_session* session, size_t minutes_since_midnight) { TR_ASSERT(session != nullptr); session->alt_speeds_.setStartMinute(minutes_since_midnight); } size_t tr_sessionGetAltSpeedBegin(tr_session const* session) { TR_ASSERT(session != nullptr); return session->alt_speeds_.startMinute(); } void tr_sessionSetAltSpeedEnd(tr_session* session, size_t minutes_since_midnight) { TR_ASSERT(session != nullptr); session->alt_speeds_.setEndMinute(minutes_since_midnight); } size_t tr_sessionGetAltSpeedEnd(tr_session const* session) { TR_ASSERT(session != nullptr); return session->alt_speeds_.endMinute(); } void tr_sessionSetAltSpeedDay(tr_session* session, tr_sched_day days) { TR_ASSERT(session != nullptr); session->alt_speeds_.setWeekdays(days); } tr_sched_day tr_sessionGetAltSpeedDay(tr_session const* session) { TR_ASSERT(session != nullptr); return session->alt_speeds_.weekdays(); } void tr_sessionUseAltSpeed(tr_session* session, bool enabled) { session->alt_speeds_.setActive(enabled, tr_session_alt_speeds::ChangeReason::User); } bool tr_sessionUsesAltSpeed(tr_session const* session) { TR_ASSERT(session != nullptr); return session->alt_speeds_.isActive(); } void tr_sessionSetAltSpeedFunc(tr_session* session, tr_altSpeedFunc func, void* user_data) { TR_ASSERT(session != nullptr); session->alt_speed_active_changed_func_ = func; session->alt_speed_active_changed_func_user_data_ = user_data; } // --- void tr_sessionSetPeerLimit(tr_session* session, uint16_t max_global_peers) { TR_ASSERT(session != nullptr); session->settings_.peer_limit_global = max_global_peers; } uint16_t tr_sessionGetPeerLimit(tr_session const* session) { TR_ASSERT(session != nullptr); return session->peerLimit(); } void tr_sessionSetPeerLimitPerTorrent(tr_session* session, uint16_t max_peers) { TR_ASSERT(session != nullptr); session->settings_.peer_limit_per_torrent = max_peers; } uint16_t tr_sessionGetPeerLimitPerTorrent(tr_session const* session) { TR_ASSERT(session != nullptr); return session->peerLimitPerTorrent(); } // --- void tr_sessionSetPaused(tr_session* session, bool is_paused) { TR_ASSERT(session != nullptr); session->settings_.should_start_added_torrents = !is_paused; } bool tr_sessionGetPaused(tr_session const* session) { TR_ASSERT(session != nullptr); return session->shouldPauseAddedTorrents(); } void tr_sessionSetDeleteSource(tr_session* session, bool delete_source) { TR_ASSERT(session != nullptr); session->settings_.should_delete_source_torrents = delete_source; } // --- double tr_sessionGetRawSpeed_KBps(tr_session const* session, tr_direction dir) { auto const bps = session != nullptr ? session->top_bandwidth_.getRawSpeedBytesPerSecond(0, dir) : 0; return tr_toSpeedKBps(bps); } void tr_session::closeImplPart1(std::promise* closed_promise, std::chrono::time_point deadline) { is_closing_ = true; // close the low-hanging fruit that can be closed immediately w/o consequences utp_timer.reset(); verifier_.reset(); save_timer_.reset(); now_timer_.reset(); rpc_server_.reset(); dht_.reset(); lpd_.reset(); port_forwarding_.reset(); bound_ipv6_.reset(); bound_ipv4_.reset(); // Close the torrents in order of most active to least active // so that the most important announce=stopped events are // fired out first... auto torrents = getAllTorrents(); std::sort( std::begin(torrents), std::end(torrents), [](auto const* a, auto const* b) { auto const a_cur = a->downloadedCur + a->uploadedCur; auto const b_cur = b->downloadedCur + b->uploadedCur; return a_cur > b_cur; // larger xfers go first }); for (auto* tor : torrents) { tr_torrentFreeInSessionThread(tor); } torrents.clear(); // ...now that all the torrents have been closed, any remaining // `&event=stopped` announce messages are queued in the announcer. // Tell the announcer to start shutdown, which sends out the stop // events and stops scraping. this->announcer_->startShutdown(); // ...and now that those are queued, tell web_ that we're shutting // down soon. This leaves the `event=stopped` going but refuses any // new tasks. this->web_->startShutdown(10s); this->cache.reset(); // recycle the now-unused save_timer_ here to wait for UDP shutdown TR_ASSERT(!save_timer_); save_timer_ = timerMaker().create([this, closed_promise, deadline]() { closeImplPart2(closed_promise, deadline); }); save_timer_->startRepeating(50ms); } void tr_session::closeImplPart2(std::promise* closed_promise, std::chrono::time_point deadline) { // try to keep the UDP announcer alive long enough to send out // all the &event=stopped tracker announces if (n_pending_stops_ != 0U && std::chrono::steady_clock::now() < deadline) { announcer_udp_->upkeep(); return; } save_timer_.reset(); this->announcer_.reset(); this->announcer_udp_.reset(); stats().saveIfDirty(); peer_mgr_.reset(); openFiles().closeAll(); tr_utpClose(this); this->udp_core_.reset(); // tada we are done! closed_promise->set_value(); } void tr_sessionClose(tr_session* session, size_t timeout_secs) { TR_ASSERT(session != nullptr); TR_ASSERT(!session->amInSessionThread()); tr_logAddInfo(fmt::format(_("Transmission version {version} shutting down"), fmt::arg("version", LONG_VERSION_STRING))); auto closed_promise = std::promise{}; auto closed_future = closed_promise.get_future(); auto const deadline = std::chrono::steady_clock::now() + std::chrono::seconds{ timeout_secs }; session->runInSessionThread([&closed_promise, deadline, session]() { session->closeImplPart1(&closed_promise, deadline); }); closed_future.wait(); delete session; } namespace { namespace load_torrents_helpers { void session_load_torrents(tr_session* session, tr_ctor* ctor, std::promise* loaded_promise) { auto const& dirname = session->torrentDir(); auto const info = tr_sys_path_get_info(dirname); auto const odir = info && info->isFolder() ? tr_sys_dir_open(dirname.c_str()) : TR_BAD_SYS_DIR; auto n_torrents = size_t{}; if (odir != TR_BAD_SYS_DIR) { char const* name = nullptr; while ((name = tr_sys_dir_read_name(odir)) != nullptr) { if (!tr_strvEndsWith(name, ".torrent"sv) && !tr_strvEndsWith(name, ".magnet"sv)) { continue; } // is a magnet link? if (auto const path = tr_pathbuf{ dirname, '/', name }; !tr_ctorSetMetainfoFromFile(ctor, path.sv(), nullptr)) { if (auto buf = std::vector{}; tr_loadFile(path, buf)) { tr_ctorSetMetainfoFromMagnetLink(ctor, std::string_view{ std::data(buf), std::size(buf) }, nullptr); } } if (tr_torrentNew(ctor, nullptr) != nullptr) { ++n_torrents; } } tr_sys_dir_close(odir); } if (n_torrents != 0U) { tr_logAddInfo(fmt::format( tr_ngettext("Loaded {count} torrent", "Loaded {count} torrents", n_torrents), fmt::arg("count", n_torrents))); } loaded_promise->set_value(n_torrents); } } // namespace load_torrents_helpers } // namespace size_t tr_sessionLoadTorrents(tr_session* session, tr_ctor* ctor) { using namespace load_torrents_helpers; auto loaded_promise = std::promise{}; auto loaded_future = loaded_promise.get_future(); session->runInSessionThread(session_load_torrents, session, ctor, &loaded_promise); loaded_future.wait(); auto const n_torrents = loaded_future.get(); return n_torrents; } size_t tr_sessionGetAllTorrents(tr_session* session, tr_torrent** buf, size_t buflen) { auto& torrents = session->torrents(); auto const n = std::size(torrents); if (buflen >= n) { std::copy_n(std::begin(torrents), n, buf); } return n; } // --- void tr_sessionSetPexEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->settings_.pex_enabled = enabled; } bool tr_sessionIsPexEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->allowsPEX(); } bool tr_sessionIsDHTEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->allowsDHT(); } void tr_sessionSetDHTEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); if (enabled != session->allowsDHT()) { session->runInSessionThread( [session, enabled]() { auto settings = session->settings_; settings.dht_enabled = enabled; session->setSettings(std::move(settings), false); }); } } // --- bool tr_session::allowsUTP() const noexcept { #ifdef WITH_UTP return settings_.utp_enabled; #else return false; #endif } bool tr_sessionIsUTPEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->allowsUTP(); } void tr_sessionSetUTPEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); if (enabled == session->allowsUTP()) { return; } session->settings_.utp_enabled = enabled; } void tr_sessionSetLPDEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); if (enabled != session->allowsLPD()) { session->runInSessionThread( [session, enabled]() { auto settings = session->settings_; settings.lpd_enabled = enabled; session->setSettings(std::move(settings), false); }); } } bool tr_sessionIsLPDEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->allowsLPD(); } // --- void tr_sessionSetCacheLimit_MB(tr_session* session, size_t mb) { TR_ASSERT(session != nullptr); session->settings_.cache_size_mb = mb; session->cache->setLimit(tr_toMemBytes(mb)); } size_t tr_sessionGetCacheLimit_MB(tr_session const* session) { TR_ASSERT(session != nullptr); return session->settings_.cache_size_mb; } // --- void tr_session::setDefaultTrackers(std::string_view trackers) { auto const oldval = default_trackers_; settings_.default_trackers_str = trackers; default_trackers_.parse(trackers); // if the list changed, update all the public torrents if (default_trackers_ != oldval) { for (auto* const tor : torrents()) { if (tor->isPublic()) { announcer_->resetTorrent(tor); } } } } void tr_sessionSetDefaultTrackers(tr_session* session, char const* trackers) { TR_ASSERT(session != nullptr); session->setDefaultTrackers(trackers != nullptr ? trackers : ""); } // --- tr_bandwidth& tr_session::getBandwidthGroup(std::string_view name) { auto& groups = this->bandwidth_groups_; for (auto const& [group_name, group] : groups) { if (group_name == name) { return *group; } } auto& [group_name, group] = groups.emplace_back(name, std::make_unique(new tr_bandwidth(&top_bandwidth_))); return *group; } // --- void tr_sessionSetPortForwardingEnabled(tr_session* session, bool enabled) { session->runInSessionThread([session, enabled]() { session->port_forwarding_->setEnabled(enabled); }); } bool tr_sessionIsPortForwardingEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->port_forwarding_->isEnabled(); } // --- void tr_session::useBlocklist(bool enabled) { settings_.blocklist_enabled = enabled; std::for_each( std::begin(blocklists_), std::end(blocklists_), [enabled](auto& blocklist) { blocklist.setEnabled(enabled); }); } bool tr_session::addressIsBlocked(tr_address const& addr) const noexcept { return std::any_of( std::begin(blocklists_), std::end(blocklists_), [&addr](auto& blocklist) { return blocklist.contains(addr); }); } void tr_sessionReloadBlocklists(tr_session* session) { session->blocklists_ = libtransmission::Blocklist::loadBlocklists(session->blocklist_dir_, session->useBlocklist()); if (session->peer_mgr_) { tr_peerMgrOnBlocklistChanged(session->peer_mgr_.get()); } } size_t tr_blocklistGetRuleCount(tr_session const* session) { TR_ASSERT(session != nullptr); auto& src = session->blocklists_; return std::accumulate(std::begin(src), std::end(src), 0, [](int sum, auto& cur) { return sum + std::size(cur); }); } bool tr_blocklistIsEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->useBlocklist(); } void tr_blocklistSetEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->useBlocklist(enabled); } bool tr_blocklistExists(tr_session const* session) { TR_ASSERT(session != nullptr); return !std::empty(session->blocklists_); } size_t tr_blocklistSetContent(tr_session* session, char const* content_filename) { auto const lock = session->unique_lock(); // These rules will replace the default blocklist. // Build the path of the default blocklist .bin file where we'll save these rules. auto const bin_file = tr_pathbuf{ session->blocklist_dir_, '/', DEFAULT_BLOCKLIST_FILENAME }; // Try to save it auto added = libtransmission::Blocklist::saveNew(content_filename, bin_file, session->useBlocklist()); if (!added) { return 0U; } auto const n_rules = std::size(*added); // Add (or replace) it in our blocklists_ vector auto& src = session->blocklists_; if (auto iter = std::find_if( std::begin(src), std::end(src), [&bin_file](auto const& candidate) { return bin_file == candidate.binFile(); }); iter != std::end(src)) { *iter = std::move(*added); } else { src.emplace_back(std::move(*added)); } return n_rules; } void tr_blocklistSetURL(tr_session* session, char const* url) { session->setBlocklistUrl(url != nullptr ? url : ""); } char const* tr_blocklistGetURL(tr_session const* session) { return session->blocklistUrl().c_str(); } // --- void tr_session::setRpcWhitelist(std::string_view whitelist) const { this->rpc_server_->setWhitelist(whitelist); } void tr_session::useRpcWhitelist(bool enabled) const { this->rpc_server_->setWhitelistEnabled(enabled); } bool tr_session::useRpcWhitelist() const { return this->rpc_server_->isWhitelistEnabled(); } void tr_sessionSetRPCEnabled(tr_session* session, bool is_enabled) { TR_ASSERT(session != nullptr); session->rpc_server_->setEnabled(is_enabled); } bool tr_sessionIsRPCEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->isEnabled(); } void tr_sessionSetRPCPort(tr_session* session, uint16_t hport) { TR_ASSERT(session != nullptr); if (session->rpc_server_) { session->rpc_server_->setPort(tr_port::fromHost(hport)); } } uint16_t tr_sessionGetRPCPort(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_ ? session->rpc_server_->port().host() : uint16_t{}; } void tr_sessionSetRPCCallback(tr_session* session, tr_rpc_func func, void* user_data) { TR_ASSERT(session != nullptr); session->rpc_func_ = func; session->rpc_func_user_data_ = user_data; } void tr_sessionSetRPCWhitelist(tr_session* session, char const* whitelist) { TR_ASSERT(session != nullptr); session->setRpcWhitelist(whitelist != nullptr ? whitelist : ""); } char const* tr_sessionGetRPCWhitelist(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->whitelist().c_str(); } void tr_sessionSetRPCWhitelistEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->useRpcWhitelist(enabled); } bool tr_sessionGetRPCWhitelistEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->useRpcWhitelist(); } void tr_sessionSetRPCPassword(tr_session* session, char const* password) { TR_ASSERT(session != nullptr); session->rpc_server_->setPassword(password != nullptr ? password : ""); } char const* tr_sessionGetRPCPassword(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->getSaltedPassword().c_str(); } void tr_sessionSetRPCUsername(tr_session* session, char const* username) { TR_ASSERT(session != nullptr); session->rpc_server_->setUsername(username != nullptr ? username : ""); } char const* tr_sessionGetRPCUsername(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->username().c_str(); } void tr_sessionSetRPCPasswordEnabled(tr_session* session, bool enabled) { TR_ASSERT(session != nullptr); session->rpc_server_->setPasswordEnabled(enabled); } bool tr_sessionIsRPCPasswordEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->isPasswordEnabled(); } // --- void tr_sessionSetScriptEnabled(tr_session* session, TrScript type, bool enabled) { TR_ASSERT(session != nullptr); TR_ASSERT(type < TR_SCRIPT_N_TYPES); session->useScript(type, enabled); } bool tr_sessionIsScriptEnabled(tr_session const* session, TrScript type) { TR_ASSERT(session != nullptr); TR_ASSERT(type < TR_SCRIPT_N_TYPES); return session->useScript(type); } void tr_sessionSetScript(tr_session* session, TrScript type, char const* script) { TR_ASSERT(session != nullptr); TR_ASSERT(type < TR_SCRIPT_N_TYPES); session->setScript(type, script != nullptr ? script : ""); } char const* tr_sessionGetScript(tr_session const* session, TrScript type) { TR_ASSERT(session != nullptr); TR_ASSERT(type < TR_SCRIPT_N_TYPES); return session->script(type).c_str(); } // --- void tr_sessionSetQueueSize(tr_session* session, tr_direction dir, size_t max_simultaneous_torrents) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); if (dir == TR_DOWN) { session->settings_.download_queue_size = max_simultaneous_torrents; } else { session->settings_.seed_queue_size = max_simultaneous_torrents; } } size_t tr_sessionGetQueueSize(tr_session const* session, tr_direction dir) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); return session->queueSize(dir); } void tr_sessionSetQueueEnabled(tr_session* session, tr_direction dir, bool do_limit_simultaneous_torrents) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); if (dir == TR_DOWN) { session->settings_.download_queue_enabled = do_limit_simultaneous_torrents; } else { session->settings_.seed_queue_enabled = do_limit_simultaneous_torrents; } } bool tr_sessionGetQueueEnabled(tr_session const* session, tr_direction dir) { TR_ASSERT(session != nullptr); TR_ASSERT(tr_isDirection(dir)); return session->queueEnabled(dir); } void tr_sessionSetQueueStalledMinutes(tr_session* session, int minutes) { TR_ASSERT(session != nullptr); TR_ASSERT(minutes > 0); session->settings_.queue_stalled_minutes = minutes; } void tr_sessionSetQueueStalledEnabled(tr_session* session, bool is_enabled) { TR_ASSERT(session != nullptr); session->settings_.queue_stalled_enabled = is_enabled; } bool tr_sessionGetQueueStalledEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->queueStalledEnabled(); } size_t tr_sessionGetQueueStalledMinutes(tr_session const* session) { TR_ASSERT(session != nullptr); return session->queueStalledMinutes(); } void tr_sessionSetAntiBruteForceThreshold(tr_session* session, int max_bad_requests) { TR_ASSERT(session != nullptr); TR_ASSERT(max_bad_requests > 0); session->rpc_server_->setAntiBruteForceLimit(max_bad_requests); } int tr_sessionGetAntiBruteForceThreshold(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->getAntiBruteForceLimit(); } void tr_sessionSetAntiBruteForceEnabled(tr_session* session, bool is_enabled) { TR_ASSERT(session != nullptr); session->rpc_server_->setAntiBruteForceEnabled(is_enabled); } bool tr_sessionGetAntiBruteForceEnabled(tr_session const* session) { TR_ASSERT(session != nullptr); return session->rpc_server_->isAntiBruteForceEnabled(); } std::vector tr_session::getNextQueuedTorrents(tr_direction dir, size_t num_wanted) const { TR_ASSERT(tr_isDirection(dir)); // build an array of the candidates auto candidates = std::vector{}; candidates.reserve(std::size(torrents())); for (auto* const tor : torrents()) { if (tor->isQueued() && (dir == tor->queueDirection())) { candidates.push_back(tor); } } // find the best n candidates num_wanted = std::min(num_wanted, std::size(candidates)); if (num_wanted < candidates.size()) { std::partial_sort( std::begin(candidates), std::begin(candidates) + num_wanted, std::end(candidates), [](auto const* a, auto const* b) { return tr_torrentGetQueuePosition(a) < tr_torrentGetQueuePosition(b); }); candidates.resize(num_wanted); } return candidates; } size_t tr_session::countQueueFreeSlots(tr_direction dir) const noexcept { if (!queueEnabled(dir)) { return std::numeric_limits::max(); } auto const max = queueSize(dir); auto const activity = dir == TR_UP ? TR_STATUS_SEED : TR_STATUS_DOWNLOAD; /* count how many torrents are active */ auto active_count = size_t{}; bool const stalled_enabled = queueStalledEnabled(); auto const stalled_if_idle_for_n_seconds = queueStalledMinutes() * 60; time_t const now = tr_time(); for (auto const* const tor : torrents()) { /* is it the right activity? */ if (activity != tor->activity()) { continue; } /* is it stalled? */ if (stalled_enabled && difftime(now, std::max(tor->startDate, tor->activityDate)) >= stalled_if_idle_for_n_seconds) { continue; } ++active_count; /* if we've reached the limit, no need to keep counting */ if (active_count >= max) { return 0; } } return max - active_count; } // --- void tr_session::closeTorrentFiles(tr_torrent* tor) noexcept { this->cache->flushTorrent(tor); openFiles().closeTorrent(tor->id()); } void tr_session::closeTorrentFile(tr_torrent* tor, tr_file_index_t file_num) noexcept { this->cache->flushFile(tor, file_num); openFiles().closeFile(tor->id(), file_num); } // --- void tr_sessionSetQueueStartCallback(tr_session* session, void (*callback)(tr_session*, tr_torrent*, void*), void* user_data) { session->setQueueStartCallback(callback, user_data); } void tr_sessionSetRatioLimitHitCallback(tr_session* session, tr_session_ratio_limit_hit_func callback, void* user_data) { session->setRatioLimitHitCallback(callback, user_data); } void tr_sessionSetIdleLimitHitCallback(tr_session* session, tr_session_idle_limit_hit_func callback, void* user_data) { session->setIdleLimitHitCallback(callback, user_data); } void tr_sessionSetMetadataCallback(tr_session* session, tr_session_metadata_func callback, void* user_data) { session->setMetadataCallback(callback, user_data); } void tr_sessionSetCompletenessCallback(tr_session* session, tr_torrent_completeness_func callback, void* user_data) { session->setTorrentCompletenessCallback(callback, user_data); } tr_session_stats tr_sessionGetStats(tr_session const* session) { return session->stats().current(); } tr_session_stats tr_sessionGetCumulativeStats(tr_session const* session) { return session->stats().cumulative(); } void tr_sessionClearStats(tr_session* session) { session->stats().clear(); } namespace { auto constexpr SaveIntervalSecs = 360s; auto makeResumeDir(std::string_view config_dir) { #if defined(__APPLE__) || defined(_WIN32) auto dir = fmt::format("{:s}/Resume"sv, config_dir); #else auto dir = fmt::format("{:s}/resume"sv, config_dir); #endif tr_sys_dir_create(dir.c_str(), TR_SYS_DIR_CREATE_PARENTS, 0777); return dir; } auto makeTorrentDir(std::string_view config_dir) { #if defined(__APPLE__) || defined(_WIN32) auto dir = fmt::format("{:s}/Torrents"sv, config_dir); #else auto dir = fmt::format("{:s}/torrents"sv, config_dir); #endif tr_sys_dir_create(dir.c_str(), TR_SYS_DIR_CREATE_PARENTS, 0777); return dir; } auto makeBlocklistDir(std::string_view config_dir) { auto dir = fmt::format("{:s}/blocklists"sv, config_dir); tr_sys_dir_create(dir.c_str(), TR_SYS_DIR_CREATE_PARENTS, 0777); return dir; } } // namespace tr_session::tr_session(std::string_view config_dir, tr_variant* settings_dict) : config_dir_{ config_dir } , resume_dir_{ makeResumeDir(config_dir) } , torrent_dir_{ makeTorrentDir(config_dir) } , blocklist_dir_{ makeBlocklistDir(config_dir) } , session_thread_{ tr_session_thread::create() } , timer_maker_{ std::make_unique(eventBase()) } , settings_{ settings_dict } , session_id_{ tr_time } , peer_mgr_{ tr_peerMgrNew(this), &tr_peerMgrFree } , rpc_server_{ std::make_unique(this, settings_dict) } { now_timer_ = timerMaker().create([this]() { onNowTimer(); }); now_timer_->startRepeating(1s); // Periodically save the .resume files of any torrents whose // status has recently changed. This prevents loss of metadata // in the case of a crash, unclean shutdown, clumsy user, etc. save_timer_ = timerMaker().create( [this]() { for (auto* const tor : torrents()) { tr_torrentSave(tor); } stats().saveIfDirty(); }); save_timer_->startRepeating(SaveIntervalSecs); verifier_->addCallback(tr_torrentOnVerifyDone); } void tr_session::addIncoming(tr_peer_socket&& socket) { tr_peerMgrAddIncoming(peer_mgr_.get(), std::move(socket)); } void tr_session::addTorrent(tr_torrent* tor) { tor->unique_id_ = torrents().add(tor); tr_peerMgrAddTorrent(peer_mgr_.get(), tor); }