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tdlight/td/telegram/net/ConnectionCreator.cpp
levlam cf1984844b Update copyright year.
2023-01-01 00:28:08 +03:00

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// 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/ConnectionCreator.h"
#include "td/telegram/ConfigManager.h"
#include "td/telegram/Global.h"
#include "td/telegram/logevent/LogEvent.h"
#include "td/telegram/MessagesManager.h"
#include "td/telegram/net/MtprotoHeader.h"
#include "td/telegram/net/NetQueryDispatcher.h"
#include "td/telegram/net/NetType.h"
#include "td/telegram/StateManager.h"
#include "td/telegram/Td.h"
#include "td/telegram/TdDb.h"
#include "td/mtproto/Ping.h"
#include "td/mtproto/ProxySecret.h"
#include "td/mtproto/RawConnection.h"
#include "td/mtproto/TlsInit.h"
#include "td/net/GetHostByNameActor.h"
#include "td/net/HttpProxy.h"
#include "td/net/Socks5.h"
#include "td/net/TransparentProxy.h"
#include "td/utils/algorithm.h"
#include "td/utils/base64.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/Random.h"
#include "td/utils/ScopeGuard.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Time.h"
#include "td/utils/tl_helpers.h"
#include <utility>
namespace td {
int VERBOSITY_NAME(connections) = VERBOSITY_NAME(INFO);
namespace detail {
class StatsCallback final : public mtproto::RawConnection::StatsCallback {
public:
StatsCallback(std::shared_ptr<NetStatsCallback> net_stats_callback, ActorId<ConnectionCreator> connection_creator,
uint32 hash, DcOptionsSet::Stat *option_stat)
: net_stats_callback_(std::move(net_stats_callback))
, connection_creator_(std::move(connection_creator))
, hash_(hash)
, option_stat_(option_stat) {
}
void on_read(uint64 bytes) final {
net_stats_callback_->on_read(bytes);
}
void on_write(uint64 bytes) final {
net_stats_callback_->on_write(bytes);
}
void on_pong() final {
if (option_stat_) {
send_lambda(connection_creator_, [stat = option_stat_] { stat->on_ok(); });
}
send_closure(connection_creator_, &ConnectionCreator::on_pong, hash_);
}
void on_error() final {
if (option_stat_) {
send_lambda(connection_creator_, [stat = option_stat_] { stat->on_error(); });
}
}
void on_mtproto_error() final {
send_closure(connection_creator_, &ConnectionCreator::on_mtproto_error, hash_);
}
private:
std::shared_ptr<NetStatsCallback> net_stats_callback_;
ActorId<ConnectionCreator> connection_creator_;
uint32 hash_;
DcOptionsSet::Stat *option_stat_;
};
} // namespace detail
ConnectionCreator::ClientInfo::ClientInfo() {
sanity_flood_control.add_limit(5, 10);
flood_control.add_limit(1, 1);
flood_control.add_limit(4, 2);
flood_control.add_limit(8, 3);
flood_control_online.add_limit(1, 4);
flood_control_online.add_limit(5, 5);
mtproto_error_flood_control.add_limit(1, 1);
mtproto_error_flood_control.add_limit(4, 2);
mtproto_error_flood_control.add_limit(8, 3);
}
int64 ConnectionCreator::ClientInfo::extract_session_id() {
if (!session_ids_.empty()) {
auto res = *session_ids_.begin();
session_ids_.erase(session_ids_.begin());
return res;
}
int64 res = 0;
while (res == 0) {
res = Random::secure_int64();
}
return res;
}
void ConnectionCreator::ClientInfo::add_session_id(int64 session_id) {
if (session_id != 0) {
session_ids_.insert(session_id);
}
}
ConnectionCreator::ConnectionCreator(ActorShared<> parent) : parent_(std::move(parent)) {
}
ConnectionCreator::ConnectionCreator(ConnectionCreator &&other) = default;
ConnectionCreator &ConnectionCreator::operator=(ConnectionCreator &&other) = default;
ConnectionCreator::~ConnectionCreator() = default;
void ConnectionCreator::set_net_stats_callback(std::shared_ptr<NetStatsCallback> common_callback,
std::shared_ptr<NetStatsCallback> media_callback) {
common_net_stats_callback_ = std::move(common_callback);
media_net_stats_callback_ = std::move(media_callback);
}
void ConnectionCreator::add_proxy(int32 old_proxy_id, string server, int32 port, bool enable,
td_api::object_ptr<td_api::ProxyType> proxy_type,
Promise<td_api::object_ptr<td_api::proxy>> promise) {
TRY_RESULT_PROMISE(promise, new_proxy, Proxy::create_proxy(std::move(server), port, proxy_type.get()));
if (old_proxy_id >= 0) {
if (proxies_.count(old_proxy_id) == 0) {
return promise.set_error(Status::Error(400, "Proxy not found"));
}
auto &old_proxy = proxies_[old_proxy_id];
if (old_proxy == new_proxy) {
if (enable) {
enable_proxy_impl(old_proxy_id);
}
return promise.set_value(get_proxy_object(old_proxy_id));
}
if (old_proxy_id == active_proxy_id_) {
enable = true;
disable_proxy_impl();
}
proxies_.erase(old_proxy_id);
G()->td_db()->get_binlog_pmc()->erase(get_proxy_used_database_key(old_proxy_id));
proxy_last_used_date_.erase(old_proxy_id);
proxy_last_used_saved_date_.erase(old_proxy_id);
}
auto proxy_id = [&] {
for (auto &proxy : proxies_) {
if (proxy.second == new_proxy) {
return proxy.first;
}
}
int32 proxy_id = old_proxy_id;
if (proxy_id < 0) {
CHECK(max_proxy_id_ >= 2);
proxy_id = max_proxy_id_++;
G()->td_db()->get_binlog_pmc()->set("proxy_max_id", to_string(max_proxy_id_));
}
bool is_inserted = proxies_.emplace(proxy_id, std::move(new_proxy)).second;
CHECK(is_inserted);
G()->td_db()->get_binlog_pmc()->set(get_proxy_database_key(proxy_id),
log_event_store(proxies_[proxy_id]).as_slice().str());
return proxy_id;
}();
if (enable) {
enable_proxy_impl(proxy_id);
}
promise.set_value(get_proxy_object(proxy_id));
}
void ConnectionCreator::enable_proxy(int32 proxy_id, Promise<Unit> promise) {
if (proxies_.count(proxy_id) == 0) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
enable_proxy_impl(proxy_id);
promise.set_value(Unit());
}
void ConnectionCreator::disable_proxy(Promise<Unit> promise) {
save_proxy_last_used_date(0);
disable_proxy_impl();
promise.set_value(Unit());
}
void ConnectionCreator::remove_proxy(int32 proxy_id, Promise<Unit> promise) {
if (proxies_.count(proxy_id) == 0) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
if (proxy_id == active_proxy_id_) {
disable_proxy_impl();
}
proxies_.erase(proxy_id);
G()->td_db()->get_binlog_pmc()->erase(get_proxy_database_key(proxy_id));
G()->td_db()->get_binlog_pmc()->erase(get_proxy_used_database_key(proxy_id));
promise.set_value(Unit());
}
void ConnectionCreator::get_proxies(Promise<td_api::object_ptr<td_api::proxies>> promise) {
promise.set_value(td_api::make_object<td_api::proxies>(
transform(proxies_, [this](const std::pair<int32, Proxy> &proxy) { return get_proxy_object(proxy.first); })));
}
void ConnectionCreator::get_proxy_link(int32 proxy_id, Promise<string> promise) {
auto it = proxies_.find(proxy_id);
if (it == proxies_.end()) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
auto &proxy = it->second;
string url = G()->get_option_string("t_me_url", "https://t.me/");
bool is_socks = false;
switch (proxy.type()) {
case Proxy::Type::Socks5:
url += "socks";
is_socks = true;
break;
case Proxy::Type::HttpTcp:
case Proxy::Type::HttpCaching:
return promise.set_error(Status::Error(400, "HTTP proxy can't have public link"));
case Proxy::Type::Mtproto:
url += "proxy";
break;
default:
UNREACHABLE();
}
url += "?server=";
url += url_encode(proxy.server());
url += "&port=";
url += to_string(proxy.port());
if (is_socks) {
if (!proxy.user().empty() || !proxy.password().empty()) {
url += "&user=";
url += url_encode(proxy.user());
url += "&pass=";
url += url_encode(proxy.password());
}
} else {
url += "&secret=";
url += proxy.secret().get_encoded_secret();
}
promise.set_value(std::move(url));
}
ActorId<GetHostByNameActor> ConnectionCreator::get_dns_resolver() {
if (G()->get_option_boolean("expect_blocking", true)) {
if (block_get_host_by_name_actor_.empty()) {
VLOG(connections) << "Init block bypass DNS resolver";
GetHostByNameActor::Options options;
options.scheduler_id = G()->get_gc_scheduler_id();
options.resolver_types = {GetHostByNameActor::ResolverType::Google, GetHostByNameActor::ResolverType::Native};
options.ok_timeout = 60;
options.error_timeout = 0;
block_get_host_by_name_actor_ = create_actor<GetHostByNameActor>("BlockDnsResolverActor", std::move(options));
}
return block_get_host_by_name_actor_.get();
} else {
if (get_host_by_name_actor_.empty()) {
VLOG(connections) << "Init DNS resolver";
GetHostByNameActor::Options options;
options.scheduler_id = G()->get_gc_scheduler_id();
options.ok_timeout = 5 * 60 - 1;
options.error_timeout = 0;
get_host_by_name_actor_ = create_actor<GetHostByNameActor>("DnsResolverActor", std::move(options));
}
return get_host_by_name_actor_.get();
}
}
void ConnectionCreator::ping_proxy(int32 proxy_id, Promise<double> promise) {
CHECK(!close_flag_);
if (proxy_id == 0) {
auto main_dc_id = G()->net_query_dispatcher().get_main_dc_id();
bool prefer_ipv6 = G()->get_option_boolean("prefer_ipv6");
auto infos = dc_options_set_.find_all_connections(main_dc_id, false, false, prefer_ipv6, false);
if (infos.empty()) {
return promise.set_error(Status::Error(400, "Can't find valid DC address"));
}
const size_t MAX_CONNECTIONS = 10;
if (infos.size() > MAX_CONNECTIONS) {
infos.resize(MAX_CONNECTIONS);
}
auto token = next_token();
auto &request = ping_main_dc_requests_[token];
request.promise = std::move(promise);
request.left_queries = infos.size();
request.result = Status::Error(400, "Failed to ping");
for (auto &info : infos) {
auto r_transport_type = get_transport_type(Proxy(), info);
if (r_transport_type.is_error()) {
LOG(ERROR) << r_transport_type.error();
on_ping_main_dc_result(token, r_transport_type.move_as_error());
continue;
}
auto ip_address = info.option->get_ip_address();
auto r_socket_fd = SocketFd::open(ip_address);
if (r_socket_fd.is_error()) {
LOG(DEBUG) << "Failed to open socket: " << r_socket_fd.error();
on_ping_main_dc_result(token, r_socket_fd.move_as_error());
continue;
}
ping_proxy_buffered_socket_fd(std::move(ip_address), BufferedFd<SocketFd>(r_socket_fd.move_as_ok()),
r_transport_type.move_as_ok(), PSTRING() << info.option->get_ip_address(),
PromiseCreator::lambda([actor_id = actor_id(this), token](Result<double> result) {
send_closure(actor_id, &ConnectionCreator::on_ping_main_dc_result, token,
std::move(result));
}));
}
return;
}
auto it = proxies_.find(proxy_id);
if (it == proxies_.end()) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
const Proxy &proxy = it->second;
bool prefer_ipv6 = G()->get_option_boolean("prefer_ipv6");
send_closure(get_dns_resolver(), &GetHostByNameActor::run, proxy.server().str(), proxy.port(), prefer_ipv6,
PromiseCreator::lambda([actor_id = actor_id(this), promise = std::move(promise),
proxy_id](Result<IPAddress> result) mutable {
if (result.is_error()) {
return promise.set_error(Status::Error(400, result.error().public_message()));
}
send_closure(actor_id, &ConnectionCreator::ping_proxy_resolved, proxy_id, result.move_as_ok(),
std::move(promise));
}));
}
void ConnectionCreator::ping_proxy_resolved(int32 proxy_id, IPAddress ip_address, Promise<double> promise) {
auto it = proxies_.find(proxy_id);
if (it == proxies_.end()) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
const Proxy &proxy = it->second;
auto main_dc_id = G()->net_query_dispatcher().get_main_dc_id();
FindConnectionExtra extra;
auto r_socket_fd = find_connection(proxy, ip_address, main_dc_id, false, extra);
if (r_socket_fd.is_error()) {
return promise.set_error(Status::Error(400, r_socket_fd.error().public_message()));
}
auto socket_fd = r_socket_fd.move_as_ok();
auto connection_promise = PromiseCreator::lambda(
[ip_address, promise = std::move(promise), actor_id = actor_id(this), transport_type = extra.transport_type,
debug_str = extra.debug_str](Result<ConnectionData> r_connection_data) mutable {
if (r_connection_data.is_error()) {
return promise.set_error(Status::Error(400, r_connection_data.error().public_message()));
}
auto connection_data = r_connection_data.move_as_ok();
send_closure(actor_id, &ConnectionCreator::ping_proxy_buffered_socket_fd, ip_address,
std::move(connection_data.buffered_socket_fd), std::move(transport_type), std::move(debug_str),
std::move(promise));
});
CHECK(proxy.use_proxy());
auto token = next_token();
auto ref = prepare_connection(extra.ip_address, std::move(socket_fd), proxy, extra.mtproto_ip_address,
extra.transport_type, "Ping", extra.debug_str, nullptr, create_reference(token), false,
std::move(connection_promise));
if (!ref.empty()) {
children_[token] = {false, std::move(ref)};
}
}
void ConnectionCreator::ping_proxy_buffered_socket_fd(IPAddress ip_address, BufferedFd<SocketFd> buffered_socket_fd,
mtproto::TransportType transport_type, string debug_str,
Promise<double> promise) {
auto token = next_token();
auto raw_connection =
mtproto::RawConnection::create(ip_address, std::move(buffered_socket_fd), std::move(transport_type), nullptr);
children_[token] = {
false, create_ping_actor(debug_str, std::move(raw_connection), nullptr,
PromiseCreator::lambda([promise = std::move(promise)](
Result<unique_ptr<mtproto::RawConnection>> result) mutable {
if (result.is_error()) {
return promise.set_error(Status::Error(400, result.error().public_message()));
}
auto ping_time = result.ok()->extra().rtt;
promise.set_value(std::move(ping_time));
}),
create_reference(token))};
}
void ConnectionCreator::set_active_proxy_id(int32 proxy_id, bool from_binlog) {
active_proxy_id_ = proxy_id;
if (proxy_id == 0) {
G()->set_option_empty("enabled_proxy_id");
} else {
G()->set_option_integer("enabled_proxy_id", proxy_id);
}
if (!from_binlog) {
if (proxy_id == 0) {
G()->td_db()->get_binlog_pmc()->erase("proxy_active_id");
send_closure(G()->config_manager(), &ConfigManager::request_config, false);
} else {
G()->td_db()->get_binlog_pmc()->set("proxy_active_id", to_string(proxy_id));
}
}
}
void ConnectionCreator::enable_proxy_impl(int32 proxy_id) {
CHECK(proxies_.count(proxy_id) == 1);
if (proxy_id == active_proxy_id_) {
return;
}
if ((active_proxy_id_ != 0 && proxies_[active_proxy_id_].type() == Proxy::Type::Mtproto) ||
proxies_[proxy_id].type() == Proxy::Type::Mtproto) {
update_mtproto_header(proxies_[proxy_id]);
}
save_proxy_last_used_date(0);
set_active_proxy_id(proxy_id);
on_proxy_changed(false);
}
void ConnectionCreator::disable_proxy_impl() {
if (active_proxy_id_ == 0) {
send_closure(G()->messages_manager(), &MessagesManager::remove_sponsored_dialog);
send_closure(G()->td(), &Td::schedule_get_promo_data, 0);
return;
}
CHECK(proxies_.count(active_proxy_id_) == 1);
if (proxies_[active_proxy_id_].type() == Proxy::Type::Mtproto) {
update_mtproto_header(Proxy());
}
set_active_proxy_id(0);
on_proxy_changed(false);
}
void ConnectionCreator::on_proxy_changed(bool from_db) {
send_closure(G()->state_manager(), &StateManager::on_proxy,
active_proxy_id_ != 0 && proxies_[active_proxy_id_].type() != Proxy::Type::Mtproto &&
proxies_[active_proxy_id_].type() != Proxy::Type::HttpCaching);
if (!from_db) {
for (auto &child : children_) {
if (child.second.first) {
child.second.second.reset();
}
}
}
VLOG(connections) << "Drop proxy IP address " << proxy_ip_address_;
resolve_proxy_query_token_ = 0;
resolve_proxy_timestamp_ = Timestamp();
proxy_ip_address_ = IPAddress();
if (active_proxy_id_ == 0 || !from_db) {
send_closure(G()->messages_manager(), &MessagesManager::remove_sponsored_dialog);
}
send_closure(G()->td(), &Td::schedule_get_promo_data, 0);
loop();
}
string ConnectionCreator::get_proxy_database_key(int32 proxy_id) {
CHECK(proxy_id > 0);
if (proxy_id == 1) {
return "proxy";
}
return PSTRING() << "proxy" << proxy_id;
}
string ConnectionCreator::get_proxy_used_database_key(int32 proxy_id) {
CHECK(proxy_id > 0);
return PSTRING() << "proxy_used" << proxy_id;
}
void ConnectionCreator::save_proxy_last_used_date(int32 delay) {
if (active_proxy_id_ == 0) {
return;
}
CHECK(delay >= 0);
int32 date = proxy_last_used_date_[active_proxy_id_];
int32 &saved_date = proxy_last_used_saved_date_[active_proxy_id_];
if (date <= saved_date + delay) {
return;
}
LOG(DEBUG) << "Save proxy last used date " << date;
saved_date = date;
G()->td_db()->get_binlog_pmc()->set(get_proxy_used_database_key(active_proxy_id_), to_string(date));
}
td_api::object_ptr<td_api::proxy> ConnectionCreator::get_proxy_object(int32 proxy_id) const {
auto it = proxies_.find(proxy_id);
CHECK(it != proxies_.end());
const Proxy &proxy = it->second;
td_api::object_ptr<td_api::ProxyType> type;
switch (proxy.type()) {
case Proxy::Type::Socks5:
type = make_tl_object<td_api::proxyTypeSocks5>(proxy.user().str(), proxy.password().str());
break;
case Proxy::Type::HttpTcp:
type = make_tl_object<td_api::proxyTypeHttp>(proxy.user().str(), proxy.password().str(), false);
break;
case Proxy::Type::HttpCaching:
type = make_tl_object<td_api::proxyTypeHttp>(proxy.user().str(), proxy.password().str(), true);
break;
case Proxy::Type::Mtproto:
type = make_tl_object<td_api::proxyTypeMtproto>(proxy.secret().get_encoded_secret());
break;
default:
UNREACHABLE();
}
auto last_used_date_it = proxy_last_used_date_.find(proxy_id);
auto last_used_date = last_used_date_it == proxy_last_used_date_.end() ? 0 : last_used_date_it->second;
return make_tl_object<td_api::proxy>(proxy_id, proxy.server().str(), proxy.port(), last_used_date,
proxy_id == active_proxy_id_, std::move(type));
}
void ConnectionCreator::on_network(bool network_flag, uint32 network_generation) {
VLOG(connections) << "Receive network flag " << network_flag << " with generation " << network_generation;
network_flag_ = network_flag;
auto old_generation = network_generation_;
network_generation_ = network_generation;
if (network_flag_) {
VLOG(connections) << "Set proxy query token to 0: " << old_generation << " " << network_generation_;
resolve_proxy_query_token_ = 0;
resolve_proxy_timestamp_ = Timestamp();
for (auto &client : clients_) {
client.second.backoff.clear();
client.second.sanity_flood_control.clear_events();
client.second.flood_control.clear_events();
client.second.flood_control_online.clear_events();
client_loop(client.second);
}
if (old_generation != network_generation_) {
loop();
}
}
}
void ConnectionCreator::on_online(bool online_flag) {
VLOG(connections) << "Receive online flag " << online_flag;
bool need_drop_flood_control = online_flag || !online_flag_;
online_flag_ = online_flag;
if (need_drop_flood_control) {
for (auto &client : clients_) {
client.second.backoff.clear();
client.second.sanity_flood_control.clear_events();
client.second.flood_control_online.clear_events();
client_loop(client.second);
}
}
}
void ConnectionCreator::on_logging_out(bool is_logging_out) {
if (is_logging_out_ == is_logging_out) {
return;
}
VLOG(connections) << "Receive logging out flag " << is_logging_out;
is_logging_out_ = is_logging_out;
for (auto &client : clients_) {
client.second.backoff.clear();
client.second.sanity_flood_control.clear_events();
client.second.flood_control_online.clear_events();
client_loop(client.second);
}
}
void ConnectionCreator::on_pong(uint32 hash) {
G()->save_server_time();
if (active_proxy_id_ != 0) {
auto now = G()->unix_time();
int32 &last_used = proxy_last_used_date_[active_proxy_id_];
if (now > last_used) {
last_used = now;
save_proxy_last_used_date(MAX_PROXY_LAST_USED_SAVE_DELAY);
}
}
}
void ConnectionCreator::on_mtproto_error(uint32 hash) {
auto &client = clients_[hash];
client.hash = hash;
client.mtproto_error_flood_control.add_event(Time::now_cached());
}
void ConnectionCreator::request_raw_connection(DcId dc_id, bool allow_media_only, bool is_media,
Promise<unique_ptr<mtproto::RawConnection>> promise, uint32 hash,
unique_ptr<mtproto::AuthData> auth_data) {
auto &client = clients_[hash];
if (!client.inited) {
client.inited = true;
client.hash = hash;
client.dc_id = dc_id;
client.allow_media_only = allow_media_only;
client.is_media = is_media;
} else {
CHECK(client.hash == hash);
CHECK(client.dc_id == dc_id);
CHECK(client.allow_media_only == allow_media_only);
CHECK(client.is_media == is_media);
}
client.auth_data = std::move(auth_data);
client.auth_data_generation++;
VLOG(connections) << "Request connection for " << tag("client", format::as_hex(client.hash)) << " to " << dc_id << " "
<< tag("allow_media_only", allow_media_only);
client.queries.push_back(std::move(promise));
client_loop(client);
}
void ConnectionCreator::request_raw_connection_by_ip(IPAddress ip_address, mtproto::TransportType transport_type,
Promise<unique_ptr<mtproto::RawConnection>> promise) {
auto r_socket_fd = SocketFd::open(ip_address);
if (r_socket_fd.is_error()) {
return promise.set_error(r_socket_fd.move_as_error());
}
auto socket_fd = r_socket_fd.move_as_ok();
auto connection_promise = PromiseCreator::lambda([promise = std::move(promise), actor_id = actor_id(this),
transport_type, network_generation = network_generation_,
ip_address](Result<ConnectionData> r_connection_data) mutable {
if (r_connection_data.is_error()) {
return promise.set_error(Status::Error(400, r_connection_data.error().public_message()));
}
auto connection_data = r_connection_data.move_as_ok();
auto raw_connection = mtproto::RawConnection::create(ip_address, std::move(connection_data.buffered_socket_fd),
transport_type, nullptr);
raw_connection->extra().extra = network_generation;
promise.set_value(std::move(raw_connection));
});
auto token = next_token();
auto ref = prepare_connection(ip_address, std::move(socket_fd), Proxy(), IPAddress(), transport_type, "Raw",
PSTRING() << "to IP address " << ip_address, nullptr, create_reference(token), false,
std::move(connection_promise));
if (!ref.empty()) {
children_[token] = {false, std::move(ref)};
}
}
Result<mtproto::TransportType> ConnectionCreator::get_transport_type(const Proxy &proxy,
const DcOptionsSet::ConnectionInfo &info) {
int32 int_dc_id = info.option->get_dc_id().get_raw_id();
if (G()->is_test_dc()) {
int_dc_id += 10000;
}
auto raw_dc_id = narrow_cast<int16>(info.option->is_media_only() ? -int_dc_id : int_dc_id);
if (proxy.use_mtproto_proxy()) {
return mtproto::TransportType{mtproto::TransportType::ObfuscatedTcp, raw_dc_id, proxy.secret()};
}
if (proxy.use_http_caching_proxy()) {
CHECK(info.option != nullptr);
string proxy_authorization;
if (!proxy.user().empty() || !proxy.password().empty()) {
proxy_authorization = "|basic " + base64_encode(PSLICE() << proxy.user() << ':' << proxy.password());
}
return mtproto::TransportType{mtproto::TransportType::Http, 0,
mtproto::ProxySecret::from_raw(
PSTRING() << info.option->get_ip_address().get_ip_host() << proxy_authorization)};
}
if (info.use_http) {
return mtproto::TransportType{mtproto::TransportType::Http, 0, mtproto::ProxySecret()};
} else {
return mtproto::TransportType{mtproto::TransportType::ObfuscatedTcp, raw_dc_id, info.option->get_secret()};
}
}
Result<SocketFd> ConnectionCreator::find_connection(const Proxy &proxy, const IPAddress &proxy_ip_address, DcId dc_id,
bool allow_media_only, FindConnectionExtra &extra) {
extra.debug_str = PSTRING() << "Failed to find valid IP address for " << dc_id;
bool prefer_ipv6 = G()->get_option_boolean("prefer_ipv6") || (proxy.use_proxy() && proxy_ip_address.is_ipv6());
bool only_http = proxy.use_http_caching_proxy();
#if TD_DARWIN_WATCH_OS
only_http = true;
#endif
TRY_RESULT(info, dc_options_set_.find_connection(
dc_id, allow_media_only, proxy.use_proxy() && proxy.use_socks5_proxy(), prefer_ipv6, only_http));
extra.stat = info.stat;
TRY_RESULT_ASSIGN(extra.transport_type, get_transport_type(proxy, info));
extra.debug_str = PSTRING() << " to " << (info.option->is_media_only() ? "MEDIA " : "") << dc_id
<< (info.use_http ? " over HTTP" : "");
if (proxy.use_mtproto_proxy()) {
extra.debug_str = PSTRING() << "MTProto " << proxy_ip_address << extra.debug_str;
VLOG(connections) << "Create: " << extra.debug_str;
return SocketFd::open(proxy_ip_address);
}
extra.check_mode |= info.should_check;
if (proxy.use_proxy()) {
extra.mtproto_ip_address = info.option->get_ip_address();
extra.ip_address = proxy_ip_address;
extra.debug_str = PSTRING() << (proxy.use_socks5_proxy() ? "Socks5" : (only_http ? "HTTP_ONLY" : "HTTP_TCP")) << ' '
<< proxy_ip_address << " --> " << extra.mtproto_ip_address << extra.debug_str;
} else {
extra.ip_address = info.option->get_ip_address();
extra.debug_str = PSTRING() << info.option->get_ip_address() << extra.debug_str;
}
VLOG(connections) << "Create: " << extra.debug_str;
return SocketFd::open(extra.ip_address);
}
ActorOwn<> ConnectionCreator::prepare_connection(IPAddress ip_address, SocketFd socket_fd, const Proxy &proxy,
const IPAddress &mtproto_ip_address,
const mtproto::TransportType &transport_type, Slice actor_name_prefix,
Slice debug_str,
unique_ptr<mtproto::RawConnection::StatsCallback> stats_callback,
ActorShared<> parent, bool use_connection_token,
Promise<ConnectionData> promise) {
if (proxy.use_socks5_proxy() || proxy.use_http_tcp_proxy() || transport_type.secret.emulate_tls()) {
VLOG(connections) << "Create new transparent proxy connection " << debug_str;
class Callback final : public TransparentProxy::Callback {
public:
explicit Callback(Promise<ConnectionData> promise, IPAddress ip_address,
unique_ptr<mtproto::RawConnection::StatsCallback> stats_callback, bool use_connection_token,
bool was_connected)
: promise_(std::move(promise))
, ip_address_(std::move(ip_address))
, stats_callback_(std::move(stats_callback))
, use_connection_token_(use_connection_token)
, was_connected_(was_connected) {
}
void set_result(Result<BufferedFd<SocketFd>> r_buffered_socket_fd) final {
if (r_buffered_socket_fd.is_error()) {
if (use_connection_token_) {
connection_token_ = mtproto::ConnectionManager::ConnectionToken();
}
if (was_connected_ && stats_callback_) {
stats_callback_->on_error();
}
promise_.set_error(Status::Error(400, r_buffered_socket_fd.error().public_message()));
} else {
ConnectionData data;
data.ip_address = ip_address_;
data.buffered_socket_fd = r_buffered_socket_fd.move_as_ok();
data.connection_token = std::move(connection_token_);
data.stats_callback = std::move(stats_callback_);
promise_.set_value(std::move(data));
}
}
void on_connected() final {
if (use_connection_token_) {
connection_token_ = mtproto::ConnectionManager::connection_proxy(
static_cast<ActorId<mtproto::ConnectionManager>>(G()->state_manager()));
}
was_connected_ = true;
}
private:
Promise<ConnectionData> promise_;
mtproto::ConnectionManager::ConnectionToken connection_token_;
IPAddress ip_address_;
unique_ptr<mtproto::RawConnection::StatsCallback> stats_callback_;
bool use_connection_token_{false};
bool was_connected_{false};
};
VLOG(connections) << "Start "
<< (proxy.use_socks5_proxy() ? "Socks5" : (proxy.use_http_tcp_proxy() ? "HTTP" : "TLS")) << ": "
<< debug_str;
auto callback = make_unique<Callback>(std::move(promise), ip_address, std::move(stats_callback),
use_connection_token, !proxy.use_socks5_proxy());
if (proxy.use_socks5_proxy()) {
return ActorOwn<>(create_actor<Socks5>(PSLICE() << actor_name_prefix << "Socks5", std::move(socket_fd),
mtproto_ip_address, proxy.user().str(), proxy.password().str(),
std::move(callback), std::move(parent)));
} else if (proxy.use_http_tcp_proxy()) {
return ActorOwn<>(create_actor<HttpProxy>(PSLICE() << actor_name_prefix << "HttpProxy", std::move(socket_fd),
mtproto_ip_address, proxy.user().str(), proxy.password().str(),
std::move(callback), std::move(parent)));
} else if (transport_type.secret.emulate_tls()) {
return ActorOwn<>(create_actor<mtproto::TlsInit>(
PSLICE() << actor_name_prefix << "TlsInit", std::move(socket_fd), transport_type.secret.get_domain(),
transport_type.secret.get_proxy_secret().str(), std::move(callback), std::move(parent),
G()->get_dns_time_difference()));
} else {
UNREACHABLE();
}
} else {
VLOG(connections) << "Create new direct connection " << debug_str;
ConnectionData data;
data.ip_address = ip_address;
data.buffered_socket_fd = BufferedFd<SocketFd>(std::move(socket_fd));
data.stats_callback = std::move(stats_callback);
promise.set_result(std::move(data));
return {};
}
}
void ConnectionCreator::client_loop(ClientInfo &client) {
CHECK(client.hash != 0);
if (!network_flag_) {
VLOG(connections) << "Exit client_loop, because there is no network";
return;
}
if (close_flag_) {
VLOG(connections) << "Exit client_loop, because of closing";
return;
}
Proxy proxy = active_proxy_id_ == 0 ? Proxy() : proxies_[active_proxy_id_];
if (proxy.use_proxy() && !proxy_ip_address_.is_valid()) {
VLOG(connections) << "Exit client_loop, because there is no valid IP address for proxy: " << proxy_ip_address_;
return;
}
VLOG(connections) << "In client_loop: " << tag("client", format::as_hex(client.hash));
// Remove expired ready connections
td::remove_if(client.ready_connections,
[&, expires_at = Time::now_cached() - ClientInfo::READY_CONNECTIONS_TIMEOUT](auto &v) {
bool drop = v.second < expires_at;
VLOG_IF(connections, drop) << "Drop expired " << tag("connection", v.first.get());
return drop;
});
// Send ready connections into promises
{
auto begin = client.queries.begin();
auto it = begin;
while (it != client.queries.end() && !client.ready_connections.empty()) {
if (!it->is_canceled()) {
VLOG(connections) << "Send to promise " << tag("connection", client.ready_connections.back().first.get());
it->set_value(std::move(client.ready_connections.back().first));
client.ready_connections.pop_back();
}
++it;
}
client.queries.erase(begin, it);
}
// Main loop. Create new connections till needed
bool check_mode = client.checking_connections != 0 && !proxy.use_proxy();
while (true) {
// Check if we need new connections
if (client.queries.empty()) {
if (!client.ready_connections.empty()) {
client_set_timeout_at(client, Time::now() + ClientInfo::READY_CONNECTIONS_TIMEOUT);
}
return;
}
if (check_mode) {
if (client.checking_connections >= 3) {
return;
}
} else {
if (client.pending_connections >= client.queries.size()) {
return;
}
}
bool act_as_if_online = online_flag_ || is_logging_out_;
// Check flood
auto &flood_control = act_as_if_online ? client.flood_control_online : client.flood_control;
auto wakeup_at = max(flood_control.get_wakeup_at(), client.mtproto_error_flood_control.get_wakeup_at());
wakeup_at = max(client.sanity_flood_control.get_wakeup_at(), wakeup_at);
if (!act_as_if_online) {
wakeup_at = max(wakeup_at, static_cast<double>(client.backoff.get_wakeup_at()));
}
if (wakeup_at > Time::now()) {
return client_set_timeout_at(client, wakeup_at);
}
client.sanity_flood_control.add_event(Time::now());
if (!act_as_if_online) {
client.backoff.add_event(static_cast<int32>(Time::now()));
}
// Create new RawConnection
// sync part
FindConnectionExtra extra;
auto r_socket_fd = find_connection(proxy, proxy_ip_address_, client.dc_id, client.allow_media_only, extra);
check_mode |= extra.check_mode;
if (r_socket_fd.is_error()) {
LOG(WARNING) << extra.debug_str << ": " << r_socket_fd.error();
if (extra.stat) {
extra.stat->on_error(); // TODO: different kind of error
}
return client_set_timeout_at(client, Time::now() + 0.1);
}
// Events with failed socket creation are ignored
flood_control.add_event(Time::now());
auto socket_fd = r_socket_fd.move_as_ok();
IPAddress debug_ip;
auto debug_ip_status = debug_ip.init_socket_address(socket_fd);
if (debug_ip_status.is_ok()) {
extra.debug_str = PSTRING() << extra.debug_str << " from " << debug_ip;
} else {
LOG(ERROR) << debug_ip_status;
}
client.pending_connections++;
if (check_mode) {
if (extra.stat) {
extra.stat->on_check();
}
client.checking_connections++;
}
auto promise = PromiseCreator::lambda(
[actor_id = actor_id(this), check_mode, transport_type = extra.transport_type, hash = client.hash,
debug_str = extra.debug_str,
network_generation = network_generation_](Result<ConnectionData> r_connection_data) mutable {
send_closure(actor_id, &ConnectionCreator::client_create_raw_connection, std::move(r_connection_data),
check_mode, std::move(transport_type), hash, std::move(debug_str), network_generation);
});
auto stats_callback =
td::make_unique<detail::StatsCallback>(client.is_media ? media_net_stats_callback_ : common_net_stats_callback_,
actor_id(this), client.hash, extra.stat);
auto token = next_token();
auto ref = prepare_connection(extra.ip_address, std::move(socket_fd), proxy, extra.mtproto_ip_address,
extra.transport_type, Slice(), extra.debug_str, std::move(stats_callback),
create_reference(token), true, std::move(promise));
if (!ref.empty()) {
children_[token] = {true, std::move(ref)};
}
}
}
void ConnectionCreator::client_create_raw_connection(Result<ConnectionData> r_connection_data, bool check_mode,
mtproto::TransportType transport_type, uint32 hash,
string debug_str, uint32 network_generation) {
unique_ptr<mtproto::AuthData> auth_data;
uint64 auth_data_generation{0};
int64 session_id{0};
if (check_mode) {
auto it = clients_.find(hash);
CHECK(it != clients_.end());
const auto &auth_data_ptr = it->second.auth_data;
if (auth_data_ptr && auth_data_ptr->use_pfs() && auth_data_ptr->has_auth_key(Time::now_cached())) {
auth_data = make_unique<mtproto::AuthData>(*auth_data_ptr);
auth_data_generation = it->second.auth_data_generation;
session_id = it->second.extract_session_id();
auth_data->set_session_id(session_id);
}
}
auto promise = PromiseCreator::lambda([actor_id = actor_id(this), hash, check_mode, auth_data_generation, session_id,
debug_str](Result<unique_ptr<mtproto::RawConnection>> result) mutable {
if (result.is_ok()) {
VLOG(connections) << "Ready connection (" << (check_mode ? "" : "un") << "checked) " << result.ok().get() << ' '
<< tag("rtt", format::as_time(result.ok()->extra().rtt)) << ' ' << debug_str;
} else {
VLOG(connections) << "Failed connection (" << (check_mode ? "" : "un") << "checked) " << result.error() << ' '
<< debug_str;
}
send_closure(actor_id, &ConnectionCreator::client_add_connection, hash, std::move(result), check_mode,
auth_data_generation, session_id);
});
if (r_connection_data.is_error()) {
return promise.set_error(r_connection_data.move_as_error());
}
auto connection_data = r_connection_data.move_as_ok();
auto raw_connection =
mtproto::RawConnection::create(connection_data.ip_address, std::move(connection_data.buffered_socket_fd),
std::move(transport_type), std::move(connection_data.stats_callback));
raw_connection->set_connection_token(std::move(connection_data.connection_token));
raw_connection->extra().extra = network_generation;
raw_connection->extra().debug_str = debug_str;
if (check_mode) {
VLOG(connections) << "Start check: " << debug_str << " " << (auth_data ? "with" : "without") << " auth data";
auto token = next_token();
children_[token] = {true, create_ping_actor(debug_str, std::move(raw_connection), std::move(auth_data),
std::move(promise), create_reference(token))};
} else {
promise.set_value(std::move(raw_connection));
}
}
void ConnectionCreator::client_set_timeout_at(ClientInfo &client, double wakeup_at) {
if (!client.slot.has_event()) {
client.slot.set_event(self_closure(this, &ConnectionCreator::client_wakeup, client.hash));
}
client.slot.set_timeout_at(wakeup_at);
VLOG(connections) << tag("client", format::as_hex(client.hash)) << " set timeout in "
<< wakeup_at - Time::now_cached();
}
void ConnectionCreator::client_add_connection(uint32 hash, Result<unique_ptr<mtproto::RawConnection>> r_raw_connection,
bool check_flag, uint64 auth_data_generation, int64 session_id) {
auto &client = clients_[hash];
client.add_session_id(session_id);
CHECK(client.pending_connections > 0);
client.pending_connections--;
if (check_flag) {
CHECK(client.checking_connections > 0);
client.checking_connections--;
}
if (r_raw_connection.is_ok()) {
VLOG(connections) << "Add ready connection " << r_raw_connection.ok().get() << " for "
<< tag("client", format::as_hex(hash));
client.backoff.clear();
client.ready_connections.emplace_back(r_raw_connection.move_as_ok(), Time::now_cached());
} else {
if (r_raw_connection.error().code() == -404 && client.auth_data &&
client.auth_data_generation == auth_data_generation) {
VLOG(connections) << "Drop auth data from " << tag("client", format::as_hex(hash));
client.auth_data = nullptr;
client.auth_data_generation++;
}
}
client_loop(client);
}
void ConnectionCreator::client_wakeup(uint32 hash) {
VLOG(connections) << tag("hash", format::as_hex(hash)) << " wakeup";
G()->save_server_time();
client_loop(clients_[hash]);
}
void ConnectionCreator::on_dc_options(DcOptions new_dc_options) {
VLOG(connections) << "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) {
if (!dc_id.is_exact()) {
return promise.set_error(Status::Error("Invalid dc_id"));
}
IPAddress ip_address;
TRY_STATUS_PROMISE(promise, 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));
promise.set_value(Unit());
}
void ConnectionCreator::update_mtproto_header(const Proxy &proxy) {
if (G()->have_mtproto_header()) {
G()->mtproto_header().set_proxy(proxy);
}
if (G()->have_net_query_dispatcher()) {
G()->net_query_dispatcher().update_mtproto_header();
}
}
void ConnectionCreator::start_up() {
class StateCallback final : public StateManager::Callback {
public:
explicit StateCallback(ActorId<ConnectionCreator> connection_creator)
: connection_creator_(std::move(connection_creator)) {
}
bool on_network(NetType network_type, uint32 generation) final {
send_closure(connection_creator_, &ConnectionCreator::on_network, network_type != NetType::None, generation);
return connection_creator_.is_alive();
}
bool on_online(bool online_flag) final {
send_closure(connection_creator_, &ConnectionCreator::on_online, online_flag);
return connection_creator_.is_alive();
}
bool on_logging_out(bool is_logging_out) final {
send_closure(connection_creator_, &ConnectionCreator::on_logging_out, is_logging_out);
return connection_creator_.is_alive();
}
private:
ActorId<ConnectionCreator> connection_creator_;
};
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 proxy_info = G()->td_db()->get_binlog_pmc()->prefix_get("proxy");
auto it = proxy_info.find("_max_id");
if (it != proxy_info.end()) {
max_proxy_id_ = to_integer<int32>(it->second);
proxy_info.erase(it);
}
it = proxy_info.find("_active_id");
if (it != proxy_info.end()) {
set_active_proxy_id(to_integer<int32>(it->second), true);
proxy_info.erase(it);
}
for (auto &info : proxy_info) {
if (begins_with(info.first, "_used")) {
auto proxy_id = to_integer_safe<int32>(Slice(info.first).substr(5)).move_as_ok();
auto last_used = to_integer_safe<int32>(info.second).move_as_ok();
CHECK(proxy_id > 0);
proxy_last_used_date_[proxy_id] = last_used;
proxy_last_used_saved_date_[proxy_id] = last_used;
} else {
LOG_CHECK(!ends_with(info.first, "_max_id")) << info.first;
auto proxy_id = info.first.empty() ? static_cast<int32>(1) : to_integer_safe<int32>(info.first).move_as_ok();
CHECK(proxy_id > 0);
CHECK(proxies_.count(proxy_id) == 0);
log_event_parse(proxies_[proxy_id], info.second).ensure();
if (proxies_[proxy_id].type() == Proxy::Type::None) {
LOG_IF(ERROR, proxy_id != 1) << "Have empty proxy " << proxy_id;
proxies_.erase(proxy_id);
if (active_proxy_id_ == proxy_id) {
set_active_proxy_id(0);
}
}
}
}
if (max_proxy_id_ == 0) {
// legacy one-proxy version
max_proxy_id_ = 2;
if (!proxies_.empty()) {
CHECK(proxies_.begin()->first == 1);
set_active_proxy_id(1);
}
G()->td_db()->get_binlog_pmc()->set("proxy_max_id", "2");
} else if (max_proxy_id_ < 2) {
LOG(ERROR) << "Found wrong max_proxy_id = " << max_proxy_id_;
max_proxy_id_ = 2;
}
if (active_proxy_id_ != 0) {
if (proxies_[active_proxy_id_].type() == Proxy::Type::Mtproto) {
update_mtproto_header(proxies_[active_proxy_id_]);
}
on_proxy_changed(true);
}
ref_cnt_guard_ = create_reference(-1);
is_inited_ = true;
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;
save_proxy_last_used_date(0);
ref_cnt_guard_.reset();
for (auto &child : children_) {
child.second.second.reset();
}
}
DcOptions ConnectionCreator::get_default_dc_options(bool is_test) {
DcOptions res;
enum class HostType : int32 { IPv4, IPv6, Url };
auto add_ip_ports = [&res](int32 dc_id, const vector<string> &ips, const vector<int> &ports,
HostType type = HostType::IPv4) {
IPAddress ip_address;
for (auto port : ports) {
for (auto &ip : ips) {
switch (type) {
case HostType::IPv4:
ip_address.init_ipv4_port(ip, port).ensure();
break;
case HostType::IPv6:
ip_address.init_ipv6_port(ip, port).ensure();
break;
case HostType::Url:
ip_address.init_host_port(ip, port).ensure();
break;
}
res.dc_options.emplace_back(DcId::internal(dc_id), ip_address);
}
}
};
vector<int> ports = {443, 80, 5222};
#if TD_EMSCRIPTEN
if (is_test) {
add_ip_ports(1, {"pluto.web.telegram.org/apiws_test"}, {443}, HostType::Url);
add_ip_ports(2, {"venus.web.telegram.org/apiws_test"}, {443}, HostType::Url);
add_ip_ports(3, {"aurora.web.telegram.org/apiws_test"}, {443}, HostType::Url);
} else {
add_ip_ports(1, {"pluto.web.telegram.org/apiws"}, {443}, HostType::Url);
add_ip_ports(2, {"venus.web.telegram.org/apiws"}, {443}, HostType::Url);
add_ip_ports(3, {"aurora.web.telegram.org/apiws"}, {443}, HostType::Url);
add_ip_ports(4, {"vesta.web.telegram.org/apiws"}, {443}, HostType::Url);
add_ip_ports(5, {"flora.web.telegram.org/apiws"}, {443}, HostType::Url);
}
#else
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, HostType::IPv6);
add_ip_ports(2, {"2001:67c:4e8:f002::e"}, ports, HostType::IPv6);
add_ip_ports(3, {"2001:b28:f23d:f003::e"}, ports, HostType::IPv6);
} else {
add_ip_ports(1, {"149.154.175.50"}, ports);
add_ip_ports(2, {"149.154.167.51", "95.161.76.100"}, 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, HostType::IPv6);
add_ip_ports(2, {"2001:67c:4e8:f002::a"}, ports, HostType::IPv6);
add_ip_ports(3, {"2001:b28:f23d:f003::a"}, ports, HostType::IPv6);
add_ip_ports(4, {"2001:67c:4e8:f004::a"}, ports, HostType::IPv6);
add_ip_ports(5, {"2001:b28:f23f:f005::a"}, ports, HostType::IPv6);
}
#endif
return res;
}
void ConnectionCreator::loop() {
if (G()->close_flag()) {
return;
}
if (!is_inited_) {
return;
}
if (!network_flag_) {
return;
}
Timestamp timeout;
if (active_proxy_id_ != 0) {
if (resolve_proxy_timestamp_.is_in_past()) {
if (resolve_proxy_query_token_ == 0) {
resolve_proxy_query_token_ = next_token();
const Proxy &proxy = proxies_[active_proxy_id_];
bool prefer_ipv6 = G()->get_option_boolean("prefer_ipv6");
VLOG(connections) << "Resolve IP address " << resolve_proxy_query_token_ << " of " << proxy.server();
send_closure(
get_dns_resolver(), &GetHostByNameActor::run, proxy.server().str(), proxy.port(), prefer_ipv6,
PromiseCreator::lambda([actor_id = create_reference(resolve_proxy_query_token_)](Result<IPAddress> result) {
send_closure(actor_id, &ConnectionCreator::on_proxy_resolved, std::move(result), false);
}));
}
} else {
CHECK(resolve_proxy_query_token_ == 0);
timeout.relax(resolve_proxy_timestamp_);
}
}
if (timeout) {
set_timeout_at(timeout.at());
}
}
void ConnectionCreator::on_proxy_resolved(Result<IPAddress> r_ip_address, bool dummy) {
SCOPE_EXIT {
loop();
};
if (get_link_token() != resolve_proxy_query_token_) {
VLOG(connections) << "Ignore unneeded proxy IP address " << get_link_token() << ", expected "
<< resolve_proxy_query_token_;
return;
}
resolve_proxy_query_token_ = 0;
if (r_ip_address.is_error()) {
VLOG(connections) << "Receive error for resolving proxy IP address: " << r_ip_address.error();
resolve_proxy_timestamp_ = Timestamp::in(1 * 60);
return;
}
proxy_ip_address_ = r_ip_address.move_as_ok();
VLOG(connections) << "Set proxy IP address to " << proxy_ip_address_;
resolve_proxy_timestamp_ = Timestamp::in(5 * 60);
for (auto &client : clients_) {
client_loop(client.second);
}
}
void ConnectionCreator::on_ping_main_dc_result(uint64 token, Result<double> result) {
auto &request = ping_main_dc_requests_[token];
CHECK(request.left_queries > 0);
if (result.is_error()) {
LOG(DEBUG) << "Receive ping error " << result.error();
if (request.result.is_error()) {
request.result = std::move(result);
}
} else {
LOG(DEBUG) << "Receive ping result " << result.ok();
if (request.result.is_error() || request.result.ok() > result.ok()) {
request.result = result.ok();
}
}
if (--request.left_queries == 0) {
if (request.result.is_error()) {
request.promise.set_error(Status::Error(400, request.result.error().public_message()));
} else {
request.promise.set_value(request.result.move_as_ok());
}
ping_main_dc_requests_.erase(token);
}
}
} // namespace td
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