719 lines
24 KiB
C++
719 lines
24 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/net/ConnectionCreator.h"
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#include "td/telegram/ConfigManager.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/logevent/LogEvent.h"
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#include "td/telegram/StateManager.h"
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#include "td/mtproto/IStreamTransport.h"
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#include "td/mtproto/PingConnection.h"
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#include "td/mtproto/RawConnection.h"
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#include "td/net/GetHostByNameActor.h"
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#include "td/net/Socks5.h"
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/IPAddress.h"
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#include "td/utils/ScopeGuard.h"
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#include "td/utils/Time.h"
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#include "td/utils/tl_helpers.h"
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#include <algorithm>
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namespace td {
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namespace detail {
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class StatsCallback final : public mtproto::RawConnection::StatsCallback {
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public:
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StatsCallback(std::shared_ptr<NetStatsCallback> net_stats_callback, ActorId<ConnectionCreator> connection_creator,
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size_t hash, DcOptionsSet::Stat *option_stat)
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: net_stats_callback_(std::move(net_stats_callback))
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, connection_creator_(std::move(connection_creator))
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, hash_(hash)
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, option_stat_(option_stat) {
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}
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void on_read(uint64 bytes) final {
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net_stats_callback_->on_read(bytes);
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}
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void on_write(uint64 bytes) final {
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net_stats_callback_->on_write(bytes);
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}
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void on_pong() final {
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send_lambda(connection_creator_, [stat = option_stat_] { stat->on_ok(); });
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}
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void on_error() final {
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send_lambda(connection_creator_, [stat = option_stat_] { stat->on_error(); });
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}
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void on_mtproto_error() final {
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send_closure(connection_creator_, &ConnectionCreator::on_mtproto_error, hash_);
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}
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private:
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std::shared_ptr<NetStatsCallback> net_stats_callback_;
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ActorId<ConnectionCreator> connection_creator_;
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size_t hash_;
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DcOptionsSet::Stat *option_stat_;
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};
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class PingActor : public Actor {
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public:
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PingActor(std::unique_ptr<mtproto::RawConnection> raw_connection,
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Promise<std::unique_ptr<mtproto::RawConnection>> promise, ActorShared<> parent)
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: promise_(std::move(promise)), parent_(std::move(parent)) {
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ping_connection_ = std::make_unique<mtproto::PingConnection>(std::move(raw_connection));
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}
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private:
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std::unique_ptr<mtproto::PingConnection> ping_connection_;
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Promise<std::unique_ptr<mtproto::RawConnection>> promise_;
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ActorShared<> parent_;
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double start_at_;
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void start_up() override {
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ping_connection_->get_pollable().set_observer(this);
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subscribe(ping_connection_->get_pollable());
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start_at_ = Time::now();
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set_timeout_in(10);
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yield();
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}
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void tear_down() override {
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finish(Status::OK());
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}
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void loop() override {
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auto status = ping_connection_->flush();
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if (status.is_error()) {
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finish(std::move(status));
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return stop();
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}
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if (ping_connection_->was_pong()) {
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finish(Status::OK());
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return stop();
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}
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}
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void timeout_expired() override {
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finish(Status::Error("Pong timeout expired"));
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stop();
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}
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void finish(Status status) {
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auto raw_connection = ping_connection_->move_as_raw_connection();
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if (!raw_connection) {
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CHECK(!promise_);
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return;
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}
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unsubscribe(raw_connection->get_pollable());
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raw_connection->get_pollable().set_observer(nullptr);
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if (promise_) {
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if (status.is_error()) {
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if (raw_connection->stats_callback()) {
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raw_connection->stats_callback()->on_error();
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}
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raw_connection->close();
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promise_.set_error(std::move(status));
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} else {
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raw_connection->rtt_ = Time::now() - start_at_;
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if (raw_connection->stats_callback()) {
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raw_connection->stats_callback()->on_pong();
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}
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promise_.set_value(std::move(raw_connection));
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}
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} else {
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if (raw_connection->stats_callback()) {
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raw_connection->stats_callback()->on_error();
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}
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raw_connection->close();
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}
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}
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};
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} // namespace detail
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template <class T>
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void Proxy::parse(T &parser) {
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using td::parse;
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parse(type_, parser);
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if (type_ == Proxy::Type::Socks5) {
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parse(server_, parser);
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parse(port_, parser);
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parse(user_, parser);
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parse(password_, parser);
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} else {
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CHECK(type_ == Proxy::Type::None);
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}
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}
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template <class T>
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void Proxy::store(T &storer) const {
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using td::store;
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store(type_, storer);
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if (type_ == Proxy::Type::Socks5) {
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store(server_, storer);
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store(port_, storer);
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store(user_, storer);
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store(password_, storer);
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} else {
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CHECK(type_ == Proxy::Type::None);
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}
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}
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ConnectionCreator::ClientInfo::ClientInfo() {
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flood_control.add_limit(1, 1);
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flood_control.add_limit(4, 2);
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flood_control.add_limit(8, 3);
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flood_control_online.add_limit(1, 4);
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flood_control_online.add_limit(5, 5);
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mtproto_error_flood_control.add_limit(1, 1);
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mtproto_error_flood_control.add_limit(4, 2);
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mtproto_error_flood_control.add_limit(8, 3);
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}
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ConnectionCreator::ConnectionCreator(ActorShared<> parent) : parent_(std::move(parent)) {
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}
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ConnectionCreator::ConnectionCreator(ConnectionCreator &&other) = default;
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ConnectionCreator &ConnectionCreator::operator=(ConnectionCreator &&other) = default;
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ConnectionCreator::~ConnectionCreator() = default;
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void ConnectionCreator::set_net_stats_callback(std::shared_ptr<NetStatsCallback> common_callback,
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std::shared_ptr<NetStatsCallback> media_callback) {
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common_net_stats_callback_ = std::move(common_callback);
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media_net_stats_callback_ = std::move(media_callback);
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}
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void ConnectionCreator::set_proxy(Proxy proxy) {
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set_proxy_impl(std::move(proxy), false);
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loop();
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}
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void ConnectionCreator::set_proxy_impl(Proxy proxy, bool from_db) {
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if (proxy_ == proxy) {
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return;
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}
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proxy_ = std::move(proxy);
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send_closure(G()->state_manager(), &StateManager::on_proxy, proxy_.type() != Proxy::Type::None);
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if (!from_db) {
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G()->td_db()->get_binlog_pmc()->set("proxy", log_event_store(proxy_).as_slice().str());
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for (auto &child : children_) {
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child.second.reset();
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}
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}
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resolve_proxy_query_token_ = 0;
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resolve_proxy_timestamp_ = Timestamp();
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proxy_ip_address_ = IPAddress();
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}
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void ConnectionCreator::get_proxy(Promise<Proxy> promise) {
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promise.set_value(Proxy(proxy_));
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}
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void ConnectionCreator::on_network(bool network_flag, uint32 network_generation) {
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network_flag_ = network_flag;
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auto old_generation = network_generation_;
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network_generation_ = network_generation;
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if (network_flag_) {
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resolve_proxy_query_token_ = 0;
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resolve_proxy_timestamp_ = Timestamp();
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for (auto &client : clients_) {
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client.second.backoff.clear();
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client.second.flood_control.clear_events();
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client.second.flood_control_online.clear_events();
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client_loop(client.second);
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}
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if (old_generation != network_generation_) {
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loop();
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}
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}
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}
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void ConnectionCreator::on_online(bool online_flag) {
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online_flag_ = online_flag;
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if (online_flag_) {
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for (auto &client : clients_) {
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client.second.backoff.clear();
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client.second.flood_control_online.clear_events();
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client_loop(client.second);
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}
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}
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}
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void ConnectionCreator::on_mtproto_error(size_t hash) {
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auto &client = clients_[hash];
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client.hash = hash;
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client.mtproto_error_flood_control.add_event(static_cast<int32>(Time::now_cached()));
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}
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void ConnectionCreator::request_raw_connection(DcId dc_id, bool allow_media_only, bool is_media,
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Promise<std::unique_ptr<mtproto::RawConnection>> promise, size_t hash) {
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auto &client = clients_[hash];
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if (!client.inited) {
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client.inited = true;
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client.hash = hash;
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client.dc_id = dc_id;
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client.allow_media_only = allow_media_only;
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client.is_media = is_media;
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} else {
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CHECK(client.hash == hash);
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CHECK(client.dc_id == dc_id);
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CHECK(client.allow_media_only == allow_media_only);
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CHECK(client.is_media == is_media);
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}
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VLOG(connections) << tag("client", format::as_hex(client.hash)) << " " << dc_id << " "
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<< tag("allow_media_only", allow_media_only);
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client.queries.push_back(std::move(promise));
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client_loop(client);
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}
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void ConnectionCreator::request_raw_connection_by_ip(IPAddress ip_address,
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Promise<std::unique_ptr<mtproto::RawConnection>> promise) {
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auto r_socket_fd = SocketFd::open(ip_address);
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if (r_socket_fd.is_error()) {
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return promise.set_error(r_socket_fd.move_as_error());
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}
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auto raw_connection = std::make_unique<mtproto::RawConnection>(
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r_socket_fd.move_as_ok(), mtproto::TransportType{mtproto::TransportType::ObfuscatedTcp, 0, ""}, nullptr);
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raw_connection->extra_ = network_generation_;
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promise.set_value(std::move(raw_connection));
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}
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void ConnectionCreator::client_loop(ClientInfo &client) {
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CHECK(client.hash != 0);
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if (!network_flag_) {
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return;
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}
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if (close_flag_) {
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return;
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}
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bool use_socks5 = proxy_.type() == Proxy::Type::Socks5;
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if (use_socks5 && !proxy_ip_address_.is_valid()) {
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return;
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}
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VLOG(connections) << "client_loop: " << tag("client", format::as_hex(client.hash));
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// Remove expired ready connections
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client.ready_connections.erase(
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std::remove_if(client.ready_connections.begin(), client.ready_connections.end(),
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[&, expire_at = Time::now_cached() - ClientInfo::READY_CONNECTIONS_TIMEOUT](auto &v) {
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bool drop = v.second < expire_at;
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VLOG_IF(connections, drop) << "Drop expired " << tag("connection", v.first.get());
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return drop;
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}),
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client.ready_connections.end());
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// Send ready connections into promises
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{
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auto begin = client.queries.begin();
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auto it = begin;
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while (it != client.queries.end() && !client.ready_connections.empty()) {
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VLOG(connections) << "Send to promise " << tag("connection", client.ready_connections.back().first.get());
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it->set_value(std::move(client.ready_connections.back().first));
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client.ready_connections.pop_back();
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++it;
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}
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client.queries.erase(begin, it);
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}
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// Main loop. Create new connections till needed
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bool check_mode = client.checking_connections != 0;
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while (true) {
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// Check if we need new connections
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if (client.queries.empty()) {
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if (!client.ready_connections.empty()) {
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client_set_timeout_at(client, Time::now() + ClientInfo::READY_CONNECTIONS_TIMEOUT);
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}
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return;
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}
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if (check_mode) {
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if (client.checking_connections >= 3) {
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return;
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}
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} else {
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if (client.pending_connections >= client.queries.size()) {
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return;
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}
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}
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// Check flood
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auto &flood_control = online_flag_ ? client.flood_control_online : client.flood_control;
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auto wakeup_at = max(flood_control.get_wakeup_at(), client.mtproto_error_flood_control.get_wakeup_at());
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if (!online_flag_) {
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wakeup_at = max(wakeup_at, client.backoff.get_wakeup_at());
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}
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if (wakeup_at > Time::now()) {
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return client_set_timeout_at(client, wakeup_at);
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}
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flood_control.add_event(static_cast<int32>(Time::now()));
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if (!online_flag_) {
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client.backoff.add_event(static_cast<int32>(Time::now()));
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}
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// Create new RawConnection
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DcOptionsSet::Stat *stat{nullptr};
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mtproto::TransportType transport_type;
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string debug_str;
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IPAddress mtproto_ip;
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// sync part
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auto r_socket_fd = [&, dc_id = client.dc_id, allow_media_only = client.allow_media_only]() -> Result<SocketFd> {
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TRY_RESULT(info, dc_options_set_.find_connection(dc_id, allow_media_only, use_socks5));
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stat = info.stat;
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if (info.use_http) {
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transport_type = {mtproto::TransportType::Http, 0, ""};
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} else {
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int16 raw_dc_id = narrow_cast<int16>(dc_id.get_raw_id());
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if (info.option->is_media_only()) {
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raw_dc_id = -raw_dc_id;
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}
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transport_type = {mtproto::TransportType::ObfuscatedTcp, raw_dc_id, info.option->get_secret().str()};
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}
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check_mode |= info.should_check;
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if (use_socks5) {
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mtproto_ip = info.option->get_ip_address();
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IPAddress socks5_ip;
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TRY_STATUS(socks5_ip.init_host_port(proxy_.server(), proxy_.port()));
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debug_str = PSTRING() << "Sock5 " << socks5_ip << " --> " << info.option->get_ip_address() << " " << dc_id
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<< (info.use_http ? " HTTP" : "");
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LOG(INFO) << "Create: " << debug_str;
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return SocketFd::open(socks5_ip);
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} else {
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debug_str = PSTRING() << info.option->get_ip_address() << " " << dc_id << (info.use_http ? " HTTP" : "");
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LOG(INFO) << "Create: " << debug_str;
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return SocketFd::open(info.option->get_ip_address());
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}
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}();
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if (r_socket_fd.is_error()) {
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LOG(WARNING) << r_socket_fd.error();
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if (stat) {
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stat->on_error(); // TODO: different kind of error
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}
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return client_set_timeout_at(client, Time::now() + 0.1);
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}
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auto socket_fd = r_socket_fd.move_as_ok();
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IPAddress debug_ip;
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auto debug_ip_status = debug_ip.init_socket_address(socket_fd);
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if (debug_ip_status.is_ok()) {
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debug_str = PSTRING() << debug_str << debug_ip;
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} else {
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LOG(ERROR) << debug_ip_status;
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}
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client.pending_connections++;
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if (check_mode) {
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stat->on_check();
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client.checking_connections++;
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}
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auto promise = PromiseCreator::lambda(
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[actor_id = actor_id(this), check_mode, transport_type, hash = client.hash, debug_str,
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network_generation = network_generation_](Result<ConnectionData> r_connection_data) mutable {
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send_closure(std::move(actor_id), &ConnectionCreator::client_create_raw_connection,
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std::move(r_connection_data), check_mode, transport_type, hash, debug_str, network_generation);
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});
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auto stats_callback = std::make_unique<detail::StatsCallback>(
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client.is_media ? media_net_stats_callback_ : common_net_stats_callback_, actor_id(this), client.hash, stat);
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if (use_socks5) {
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class Callback : public Socks5::Callback {
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public:
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explicit Callback(Promise<ConnectionData> promise, std::unique_ptr<detail::StatsCallback> stats_callback)
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: promise_(std::move(promise)), stats_callback_(std::move(stats_callback)) {
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}
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void set_result(Result<SocketFd> result) override {
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if (result.is_error()) {
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connection_token_ = StateManager::ConnectionToken();
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if (was_connected_) {
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stats_callback_->on_error();
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}
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promise_.set_error(result.move_as_error());
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} else {
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ConnectionData data;
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data.socket_fd = result.move_as_ok();
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data.connection_token = std::move(connection_token_);
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data.stats_callback = std::move(stats_callback_);
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promise_.set_value(std::move(data));
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}
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}
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void on_connected() override {
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connection_token_ = StateManager::connection_proxy(G()->state_manager());
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was_connected_ = true;
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}
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private:
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Promise<ConnectionData> promise_;
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StateManager::ConnectionToken connection_token_;
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bool was_connected_{false};
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std::unique_ptr<detail::StatsCallback> stats_callback_;
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};
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LOG(INFO) << "Start socks5: " << debug_str;
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auto token = next_token();
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children_[token] = create_actor<Socks5>(
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"Socks5", std::move(socket_fd), mtproto_ip, proxy_.user().str(), proxy_.password().str(),
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std::make_unique<Callback>(std::move(promise), std::move(stats_callback)), create_reference(token));
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} else {
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ConnectionData data;
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data.socket_fd = std::move(socket_fd);
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data.stats_callback = std::move(stats_callback);
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promise.set_result(std::move(data));
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}
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}
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}
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void ConnectionCreator::client_create_raw_connection(Result<ConnectionData> r_connection_data, bool check_mode,
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mtproto::TransportType transport_type, size_t hash,
|
|
string debug_str, uint32 network_generation) {
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|
auto promise = PromiseCreator::lambda([actor_id = actor_id(this), hash, check_mode,
|
|
debug_str](Result<std::unique_ptr<mtproto::RawConnection>> result) mutable {
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VLOG(connections) << "Ready " << debug_str << " " << tag("checked", check_mode) << tag("ok", result.is_ok());
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send_closure(std::move(actor_id), &ConnectionCreator::client_add_connection, hash, std::move(result), check_mode);
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});
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|
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|
if (r_connection_data.is_error()) {
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|
return promise.set_error(r_connection_data.move_as_error());
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|
}
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|
|
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auto connection_data = r_connection_data.move_as_ok();
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auto raw_connection = std::make_unique<mtproto::RawConnection>(
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|
std::move(connection_data.socket_fd), std::move(transport_type), std::move(connection_data.stats_callback));
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raw_connection->set_connection_token(std::move(connection_data.connection_token));
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|
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raw_connection->extra_ = network_generation;
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raw_connection->debug_str_ = debug_str;
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|
|
|
if (check_mode) {
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|
VLOG(connections) << "Start check: " << debug_str;
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|
auto token = next_token();
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|
children_[token] = create_actor<detail::PingActor>("PingActor", std::move(raw_connection), std::move(promise),
|
|
create_reference(token));
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} else {
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|
promise.set_value(std::move(raw_connection));
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|
}
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|
}
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|
|
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void ConnectionCreator::client_set_timeout_at(ClientInfo &client, double wakeup_at) {
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if (!client.slot.has_event()) {
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client.slot.set_event(self_closure(this, &ConnectionCreator::client_wakeup, client.hash));
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}
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|
client.slot.set_timeout_at(wakeup_at);
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VLOG(connections) << tag("client", format::as_hex(client.hash)) << " set timeout in "
|
|
<< wakeup_at - Time::now_cached();
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|
}
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|
|
|
void ConnectionCreator::client_add_connection(size_t hash,
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Result<std::unique_ptr<mtproto::RawConnection>> r_raw_connection,
|
|
bool check_flag) {
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|
auto &client = clients_[hash];
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|
CHECK(client.pending_connections > 0);
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|
client.pending_connections--;
|
|
if (check_flag) {
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|
CHECK(client.checking_connections > 0);
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|
client.checking_connections--;
|
|
}
|
|
if (r_raw_connection.is_ok()) {
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|
client.backoff.clear();
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|
client.ready_connections.push_back(std::make_pair(r_raw_connection.move_as_ok(), Time::now_cached()));
|
|
}
|
|
client_loop(client);
|
|
}
|
|
|
|
void ConnectionCreator::client_wakeup(size_t hash) {
|
|
LOG(INFO) << tag("hash", format::as_hex(hash)) << " wakeup";
|
|
client_loop(clients_[hash]);
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|
}
|
|
|
|
void ConnectionCreator::on_dc_options(DcOptions new_dc_options) {
|
|
LOG(INFO) << "SAVE " << new_dc_options;
|
|
G()->td_db()->get_binlog_pmc()->set("dc_options", serialize(new_dc_options));
|
|
dc_options_set_.reset();
|
|
dc_options_set_.add_dc_options(get_default_dc_options(G()->is_test_dc()));
|
|
#if !TD_EMSCRIPTEN // FIXME
|
|
dc_options_set_.add_dc_options(std::move(new_dc_options));
|
|
#endif
|
|
}
|
|
|
|
void ConnectionCreator::on_dc_update(DcId dc_id, string ip_port, Promise<> promise) {
|
|
promise.set_result([&]() -> Result<> {
|
|
if (!dc_id.is_exact()) {
|
|
return Status::Error("Invalid dc_id");
|
|
}
|
|
IPAddress ip_address;
|
|
TRY_STATUS(ip_address.init_host_port(ip_port));
|
|
DcOptions options;
|
|
options.dc_options.emplace_back(dc_id, ip_address);
|
|
send_closure(G()->config_manager(), &ConfigManager::on_dc_options_update, std::move(options));
|
|
return Unit();
|
|
}());
|
|
}
|
|
|
|
void ConnectionCreator::start_up() {
|
|
class StateCallback : public StateManager::Callback {
|
|
public:
|
|
explicit StateCallback(ActorId<ConnectionCreator> session) : session_(std::move(session)) {
|
|
}
|
|
bool on_network(NetType network_type, uint32 generation) override {
|
|
send_closure(session_, &ConnectionCreator::on_network, network_type != NetType::None, generation);
|
|
return session_.is_alive();
|
|
}
|
|
bool on_online(bool online_flag) override {
|
|
send_closure(session_, &ConnectionCreator::on_online, online_flag);
|
|
return session_.is_alive();
|
|
}
|
|
|
|
private:
|
|
ActorId<ConnectionCreator> session_;
|
|
};
|
|
send_closure(G()->state_manager(), &StateManager::add_callback, make_unique<StateCallback>(actor_id(this)));
|
|
|
|
auto serialized_dc_options = G()->td_db()->get_binlog_pmc()->get("dc_options");
|
|
DcOptions dc_options;
|
|
auto status = unserialize(dc_options, serialized_dc_options);
|
|
if (status.is_error()) {
|
|
on_dc_options(DcOptions());
|
|
} else {
|
|
on_dc_options(std::move(dc_options));
|
|
}
|
|
|
|
auto log_event_proxy = G()->td_db()->get_binlog_pmc()->get("proxy");
|
|
if (!log_event_proxy.empty()) {
|
|
Proxy proxy;
|
|
log_event_parse(proxy, log_event_proxy).ensure();
|
|
set_proxy_impl(std::move(proxy), true);
|
|
}
|
|
|
|
get_host_by_name_actor_ =
|
|
create_actor_on_scheduler<GetHostByNameActor>("GetHostByNameActor", G()->get_gc_scheduler_id(), 29 * 60, 0);
|
|
|
|
ref_cnt_guard_ = create_reference(-1);
|
|
|
|
loop();
|
|
}
|
|
|
|
void ConnectionCreator::hangup_shared() {
|
|
ref_cnt_--;
|
|
children_.erase(get_link_token());
|
|
if (ref_cnt_ == 0) {
|
|
stop();
|
|
}
|
|
}
|
|
|
|
ActorShared<ConnectionCreator> ConnectionCreator::create_reference(int64 token) {
|
|
CHECK(token != 0);
|
|
ref_cnt_++;
|
|
return actor_shared(this, token);
|
|
}
|
|
|
|
void ConnectionCreator::hangup() {
|
|
close_flag_ = true;
|
|
ref_cnt_guard_.reset();
|
|
for (auto &child : children_) {
|
|
child.second.reset();
|
|
}
|
|
}
|
|
|
|
DcOptions ConnectionCreator::get_default_dc_options(bool is_test) {
|
|
DcOptions res;
|
|
auto add_ip_ports = [&res](int32 dc_id, const vector<string> &ips, const vector<int> &ports, bool is_ipv6 = false) {
|
|
IPAddress ip_address;
|
|
for (auto &ip : ips) {
|
|
for (auto port : ports) {
|
|
if (is_ipv6) {
|
|
ip_address.init_ipv6_port(ip, port).ensure();
|
|
} else {
|
|
ip_address.init_ipv4_port(ip, port).ensure();
|
|
}
|
|
res.dc_options.emplace_back(DcId::internal(dc_id), ip_address);
|
|
}
|
|
}
|
|
};
|
|
vector<int> ports = {443, 80, 5222};
|
|
if (is_test) {
|
|
add_ip_ports(1, {"149.154.175.10"}, ports);
|
|
add_ip_ports(2, {"149.154.167.40"}, ports);
|
|
add_ip_ports(3, {"149.154.175.117"}, ports);
|
|
|
|
add_ip_ports(1, {"2001:b28:f23d:f001::e"}, ports, true);
|
|
add_ip_ports(2, {"2001:67c:4e8:f002::e"}, ports, true);
|
|
add_ip_ports(3, {"2001:b28:f23d:f003::e"}, ports, true);
|
|
} else {
|
|
add_ip_ports(1, {"149.154.175.50"}, ports);
|
|
add_ip_ports(2, {"149.154.167.51"}, ports);
|
|
add_ip_ports(3, {"149.154.175.100"}, ports);
|
|
add_ip_ports(4, {"149.154.167.91"}, ports);
|
|
add_ip_ports(5, {"149.154.171.5"}, ports);
|
|
|
|
add_ip_ports(1, {"2001:b28:f23d:f001::a"}, ports, true);
|
|
add_ip_ports(2, {"2001:67c:4e8:f002::a"}, ports, true);
|
|
add_ip_ports(3, {"2001:b28:f23d:f003::a"}, ports, true);
|
|
add_ip_ports(4, {"2001:67c:4e8:f004::a"}, ports, true);
|
|
add_ip_ports(5, {"2001:b28:f23f:f005::a"}, ports, true);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void ConnectionCreator::loop() {
|
|
if (!network_flag_) {
|
|
return;
|
|
}
|
|
if (proxy_.type() != Proxy::Type::Socks5) {
|
|
return;
|
|
}
|
|
if (resolve_proxy_query_token_ != 0) {
|
|
return;
|
|
}
|
|
if (resolve_proxy_timestamp_ && !resolve_proxy_timestamp_.is_in_past()) {
|
|
set_timeout_at(resolve_proxy_timestamp_.at());
|
|
return;
|
|
}
|
|
resolve_proxy_query_token_ = next_token();
|
|
send_closure(
|
|
get_host_by_name_actor_, &GetHostByNameActor::run, proxy_.server().str(), proxy_.port(),
|
|
PromiseCreator::lambda([actor_id = create_reference(resolve_proxy_query_token_)](Result<IPAddress> result) {
|
|
send_closure(std::move(actor_id), &ConnectionCreator::on_proxy_resolved, std::move(result), false);
|
|
}));
|
|
}
|
|
|
|
void ConnectionCreator::on_proxy_resolved(Result<IPAddress> r_ip_address, bool dummy) {
|
|
SCOPE_EXIT {
|
|
loop();
|
|
};
|
|
if (get_link_token() != resolve_proxy_query_token_) {
|
|
return;
|
|
}
|
|
resolve_proxy_query_token_ = 0;
|
|
if (r_ip_address.is_error()) {
|
|
resolve_proxy_timestamp_ = Timestamp::in(5 * 60);
|
|
return;
|
|
}
|
|
proxy_ip_address_ = r_ip_address.move_as_ok();
|
|
resolve_proxy_timestamp_ = Timestamp::in(29 * 60);
|
|
for (auto &client : clients_) {
|
|
client_loop(client.second);
|
|
}
|
|
}
|
|
|
|
} // namespace td
|