// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #include "td/telegram/net/NetQueryDispatcher.h" #include "td/telegram/net/DcAuthManager.h" #include "td/telegram/net/NetQuery.h" #include "td/telegram/net/NetQueryDelayer.h" #include "td/telegram/net/PublicRsaKeyShared.h" #include "td/telegram/net/PublicRsaKeyWatchdog.h" #include "td/telegram/net/SessionMultiProxy.h" #include "td/telegram/ConfigShared.h" #include "td/telegram/Global.h" #include "td/telegram/Td.h" #include "td/telegram/TdDb.h" #include "td/utils/common.h" #include "td/utils/format.h" #include "td/utils/logging.h" #include "td/utils/misc.h" #include "td/utils/port/thread.h" #include "td/utils/Slice.h" namespace td { void NetQueryDispatcher::complete_net_query(NetQueryPtr net_query) { auto callback = net_query->move_callback(); if (callback.empty()) { net_query->debug("sent to td (no callback)"); send_closure(G()->td(), &NetQueryCallback::on_result, std::move(net_query)); } else { net_query->debug("sent to callback", true); send_closure(std::move(callback), &NetQueryCallback::on_result, std::move(net_query)); } } void NetQueryDispatcher::dispatch(NetQueryPtr net_query) { net_query->debug("dispatch"); if (stop_flag_.load(std::memory_order_relaxed)) { net_query->set_error(Status::Error(500, "Request aborted")); return complete_net_query(std::move(net_query)); } if (net_query->is_ready()) { if (net_query->is_error()) { auto code = net_query->error().code(); if (code == 303) { try_fix_migrate(net_query); } else if (code == NetQuery::Resend) { net_query->resend(); } else if (code < 0 || code == 500 || code == 420) { net_query->debug("sent to NetQueryDelayer"); return send_closure(delayer_, &NetQueryDelayer::delay, std::move(net_query)); } } } if (!net_query->is_ready()) { if (net_query->dispatch_ttl == 0) { net_query->set_error(Status::Error("DispatchTtlError")); } } auto dest_dc_id = net_query->dc_id(); if (dest_dc_id.is_main()) { dest_dc_id = DcId::internal(main_dc_id_.load(std::memory_order_relaxed)); } if (!net_query->is_ready() && wait_dc_init(dest_dc_id, true).is_error()) { net_query->set_error(Status::Error(PSLICE() << "No such dc " << dest_dc_id)); } if (net_query->is_ready()) { return complete_net_query(std::move(net_query)); } if (net_query->dispatch_ttl > 0) { net_query->dispatch_ttl--; } size_t dc_pos = static_cast<size_t>(dest_dc_id.get_raw_id() - 1); CHECK(dc_pos < dcs_.size()); switch (net_query->type()) { case NetQuery::Type::Common: net_query->debug(PSTRING() << "sent to main session multi proxy " << dest_dc_id); send_closure_later(dcs_[dc_pos].main_session_, &SessionMultiProxy::send, std::move(net_query)); break; case NetQuery::Type::Upload: net_query->debug(PSTRING() << "sent to upload session multi proxy " << dest_dc_id); send_closure_later(dcs_[dc_pos].upload_session_, &SessionMultiProxy::send, std::move(net_query)); break; case NetQuery::Type::Download: net_query->debug(PSTRING() << "sent to download session multi proxy " << dest_dc_id); send_closure_later(dcs_[dc_pos].download_session_, &SessionMultiProxy::send, std::move(net_query)); break; case NetQuery::Type::DownloadSmall: net_query->debug(PSTRING() << "sent to download small session multi proxy " << dest_dc_id); send_closure_later(dcs_[dc_pos].download_small_session_, &SessionMultiProxy::send, std::move(net_query)); break; } } Status NetQueryDispatcher::wait_dc_init(DcId dc_id, bool force) { // TODO: optimize if (!dc_id.is_exact()) { return Status::Error("Not exact DC"); } size_t pos = static_cast<size_t>(dc_id.get_raw_id() - 1); if (pos >= dcs_.size()) { return Status::Error("Too big DC id"); } auto &dc = dcs_[pos]; bool should_init = false; if (!dc.is_valid_) { if (!force) { return Status::Error("Invalid DC"); } bool expected = false; should_init = dc.is_valid_.compare_exchange_strong(expected, true, std::memory_order_seq_cst, std::memory_order_seq_cst); } if (should_init) { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); if (stop_flag_.load(std::memory_order_relaxed) || need_destroy_auth_key_) { return Status::Error("Closing"); } // init dc dc.id_ = dc_id; decltype(common_public_rsa_key_) public_rsa_key; bool is_cdn = false; bool need_destroy_key = false; if (dc_id.is_internal()) { public_rsa_key = common_public_rsa_key_; } else { public_rsa_key = std::make_shared<PublicRsaKeyShared>(dc_id, G()->is_test_dc()); send_closure_later(public_rsa_key_watchdog_, &PublicRsaKeyWatchdog::add_public_rsa_key, public_rsa_key); is_cdn = true; } auto auth_data = AuthDataShared::create(dc_id, std::move(public_rsa_key), td_guard_); int32 session_count = get_session_count(); bool use_pfs = get_use_pfs(); int32 slow_net_scheduler_id = G()->get_slow_net_scheduler_id(); auto raw_dc_id = dc_id.get_raw_id(); int32 upload_session_count = raw_dc_id != 2 && raw_dc_id != 4 ? 8 : 4; int32 download_session_count = 2; int32 download_small_session_count = 2; dc.main_session_ = create_actor<SessionMultiProxy>(PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":main", session_count, auth_data, raw_dc_id == main_dc_id_, use_pfs, false, false, is_cdn, need_destroy_key); dc.upload_session_ = create_actor_on_scheduler<SessionMultiProxy>( PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":upload", slow_net_scheduler_id, upload_session_count, auth_data, false, use_pfs, false, true, is_cdn, need_destroy_key); dc.download_session_ = create_actor_on_scheduler<SessionMultiProxy>( PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":download", slow_net_scheduler_id, download_session_count, auth_data, false, use_pfs, true, true, is_cdn, need_destroy_key); dc.download_small_session_ = create_actor_on_scheduler<SessionMultiProxy>( PSLICE() << "SessionMultiProxy:" << raw_dc_id << ":download_small", slow_net_scheduler_id, download_small_session_count, auth_data, false, use_pfs, true, true, is_cdn, need_destroy_key); dc.is_inited_ = true; if (dc_id.is_internal()) { send_closure_later(dc_auth_manager_, &DcAuthManager::add_dc, std::move(auth_data)); } } else { while (!dc.is_inited_) { if (stop_flag_.load(std::memory_order_relaxed)) { return Status::Error("Closing"); } #if !TD_THREAD_UNSUPPORTED td::this_thread::yield(); #endif } } return Status::OK(); } void NetQueryDispatcher::dispatch_with_callback(NetQueryPtr net_query, ActorShared<NetQueryCallback> callback) { net_query->set_callback(std::move(callback)); dispatch(std::move(net_query)); } void NetQueryDispatcher::stop() { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); td_guard_.reset(); stop_flag_ = true; delayer_.hangup(); for (const auto &dc : dcs_) { dc.main_session_.hangup(); dc.upload_session_.hangup(); dc.download_session_.hangup(); dc.download_small_session_.hangup(); } public_rsa_key_watchdog_.reset(); dc_auth_manager_.reset(); } void NetQueryDispatcher::update_session_count() { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); int32 session_count = get_session_count(); bool use_pfs = get_use_pfs(); for (size_t i = 1; i < MAX_DC_COUNT; i++) { if (is_dc_inited(narrow_cast<int32>(i))) { send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_options, session_count, use_pfs); send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_use_pfs, use_pfs); send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_use_pfs, use_pfs); send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_use_pfs, use_pfs); } } } void NetQueryDispatcher::destroy_auth_keys(Promise<> promise) { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); LOG(INFO) << "Destory auth keys"; need_destroy_auth_key_ = true; for (size_t i = 1; i < MAX_DC_COUNT; i++) { if (is_dc_inited(narrow_cast<int32>(i)) && dcs_[i - 1].id_.is_internal()) { send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_destroy_auth_key, need_destroy_auth_key_); } } send_closure_later(dc_auth_manager_, &DcAuthManager::destroy, std::move(promise)); } void NetQueryDispatcher::update_use_pfs() { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); bool use_pfs = get_use_pfs(); for (size_t i = 1; i < MAX_DC_COUNT; i++) { if (is_dc_inited(narrow_cast<int32>(i))) { send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_use_pfs, use_pfs); send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_use_pfs, use_pfs); send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_use_pfs, use_pfs); send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_use_pfs, use_pfs); } } } void NetQueryDispatcher::update_mtproto_header() { std::lock_guard<std::mutex> guard(main_dc_id_mutex_); for (size_t i = 1; i < MAX_DC_COUNT; i++) { if (is_dc_inited(narrow_cast<int32>(i))) { send_closure_later(dcs_[i - 1].main_session_, &SessionMultiProxy::update_mtproto_header); send_closure_later(dcs_[i - 1].upload_session_, &SessionMultiProxy::update_mtproto_header); send_closure_later(dcs_[i - 1].download_session_, &SessionMultiProxy::update_mtproto_header); send_closure_later(dcs_[i - 1].download_small_session_, &SessionMultiProxy::update_mtproto_header); } } } void NetQueryDispatcher::update_valid_dc(DcId dc_id) { wait_dc_init(dc_id, true); } bool NetQueryDispatcher::is_dc_inited(int32 raw_dc_id) { return dcs_[raw_dc_id - 1].is_valid_.load(std::memory_order_relaxed); } int32 NetQueryDispatcher::get_session_count() { return max(G()->shared_config().get_option_integer("session_count"), 1); } bool NetQueryDispatcher::get_use_pfs() { return G()->shared_config().get_option_boolean("use_pfs") || get_session_count() > 1; } NetQueryDispatcher::NetQueryDispatcher(std::function<ActorShared<>()> create_reference) { auto s_main_dc_id = G()->td_db()->get_binlog_pmc()->get("main_dc_id"); if (!s_main_dc_id.empty()) { main_dc_id_ = to_integer<int32>(s_main_dc_id); } LOG(INFO) << tag("main_dc_id", main_dc_id_.load(std::memory_order_relaxed)); delayer_ = create_actor<NetQueryDelayer>("NetQueryDelayer", create_reference()); dc_auth_manager_ = create_actor<DcAuthManager>("DcAuthManager", create_reference()); common_public_rsa_key_ = std::make_shared<PublicRsaKeyShared>(DcId::empty(), G()->is_test_dc()); public_rsa_key_watchdog_ = create_actor<PublicRsaKeyWatchdog>("PublicRsaKeyWatchdog", create_reference()); td_guard_ = create_shared_lambda_guard([actor = create_reference()] {}); } NetQueryDispatcher::NetQueryDispatcher() = default; NetQueryDispatcher::~NetQueryDispatcher() = default; void NetQueryDispatcher::try_fix_migrate(NetQueryPtr &net_query) { auto msg = net_query->error().message(); static constexpr CSlice prefixes[] = {"PHONE_MIGRATE_", "NETWORK_MIGRATE_", "USER_MIGRATE_"}; for (auto &prefix : prefixes) { if (msg.substr(0, prefix.size()) == prefix) { int32 new_main_dc_id = to_integer<int32>(msg.substr(prefix.size())); if (!DcId::is_valid(new_main_dc_id)) { LOG(FATAL) << "Receive " << prefix << " to wrong dc " << new_main_dc_id; } if (new_main_dc_id != main_dc_id_.load(std::memory_order_relaxed)) { // Very rare event. Mutex is ok. std::lock_guard<std::mutex> guard(main_dc_id_mutex_); if (new_main_dc_id != main_dc_id_) { LOG(INFO) << "Update: " << tag("main_dc_id", main_dc_id_.load(std::memory_order_relaxed)); if (is_dc_inited(main_dc_id_.load(std::memory_order_relaxed))) { send_closure_later(dcs_[main_dc_id_ - 1].main_session_, &SessionMultiProxy::update_main_flag, false); } main_dc_id_ = new_main_dc_id; if (is_dc_inited(main_dc_id_.load(std::memory_order_relaxed))) { send_closure_later(dcs_[main_dc_id_ - 1].main_session_, &SessionMultiProxy::update_main_flag, true); } send_closure_later(dc_auth_manager_, &DcAuthManager::update_main_dc, DcId::internal(main_dc_id_.load(std::memory_order_relaxed))); G()->td_db()->get_binlog_pmc()->set("main_dc_id", to_string(main_dc_id_.load(std::memory_order_relaxed))); } } if (!net_query->dc_id().is_main()) { LOG(ERROR) << msg << " from query to non-main dc " << net_query->dc_id(); net_query->resend(DcId::internal(new_main_dc_id)); } else { net_query->resend(); } break; } } } } // namespace td