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tdlight/td/telegram/net/ConnectionCreator.cpp
levlam cb6c46071e td_api::getProxyLink. 
GitOrigin-RevId: 0d876446bbbb22467c452b088f4df24e7e1624a2
2018-05-17 21:08:51 +03:00

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// 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/telegram_api.h"
#include "td/telegram/ConfigManager.h"
#include "td/telegram/ConfigShared.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/StateManager.h"
#include "td/mtproto/IStreamTransport.h"
#include "td/mtproto/PingConnection.h"
#include "td/mtproto/RawConnection.h"
#include "td/net/GetHostByNameActor.h"
#include "td/net/Socks5.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/ScopeGuard.h"
#include "td/utils/Time.h"
#include "td/utils/tl_helpers.h"
#include <algorithm>
#include <utility>
namespace td {
namespace detail {
class StatsCallback final : public mtproto::RawConnection::StatsCallback {
public:
StatsCallback(std::shared_ptr<NetStatsCallback> net_stats_callback, ActorId<ConnectionCreator> connection_creator,
size_t 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_;
size_t hash_;
DcOptionsSet::Stat *option_stat_;
};
class PingActor : public Actor {
public:
PingActor(std::unique_ptr<mtproto::RawConnection> raw_connection,
Promise<std::unique_ptr<mtproto::RawConnection>> promise, ActorShared<> parent)
: promise_(std::move(promise)), parent_(std::move(parent)) {
ping_connection_ = std::make_unique<mtproto::PingConnection>(std::move(raw_connection));
}
private:
std::unique_ptr<mtproto::PingConnection> ping_connection_;
Promise<std::unique_ptr<mtproto::RawConnection>> promise_;
ActorShared<> parent_;
double start_at_;
void start_up() override {
ping_connection_->get_pollable().set_observer(this);
subscribe(ping_connection_->get_pollable());
start_at_ = Time::now();
set_timeout_in(10);
yield();
}
void tear_down() override {
finish(Status::OK());
}
void loop() override {
auto status = ping_connection_->flush();
if (status.is_error()) {
finish(std::move(status));
return stop();
}
if (ping_connection_->was_pong()) {
finish(Status::OK());
return stop();
}
}
void timeout_expired() override {
finish(Status::Error("Pong timeout expired"));
stop();
}
void finish(Status status) {
auto raw_connection = ping_connection_->move_as_raw_connection();
if (!raw_connection) {
CHECK(!promise_);
return;
}
unsubscribe(raw_connection->get_pollable());
raw_connection->get_pollable().set_observer(nullptr);
if (promise_) {
if (status.is_error()) {
if (raw_connection->stats_callback()) {
raw_connection->stats_callback()->on_error();
}
raw_connection->close();
promise_.set_error(std::move(status));
} else {
raw_connection->rtt_ = Time::now() - start_at_;
if (raw_connection->stats_callback()) {
raw_connection->stats_callback()->on_pong();
}
promise_.set_value(std::move(raw_connection));
}
} else {
if (raw_connection->stats_callback()) {
raw_connection->stats_callback()->on_error();
}
raw_connection->close();
}
}
};
} // namespace detail
template <class T>
void Proxy::parse(T &parser) {
using td::parse;
parse(type_, parser);
if (type_ == Proxy::Type::Socks5) {
parse(server_, parser);
parse(port_, parser);
parse(user_, parser);
parse(password_, parser);
} else if (type_ == Proxy::Type::Mtproto) {
parse(server_, parser);
parse(port_, parser);
parse(secret_, parser);
} else {
CHECK(type_ == Proxy::Type::None);
}
}
template <class T>
void Proxy::store(T &storer) const {
using td::store;
store(type_, storer);
if (type_ == Proxy::Type::Socks5) {
store(server_, storer);
store(port_, storer);
store(user_, storer);
store(password_, storer);
} else if (type_ == Proxy::Type::Mtproto) {
store(server_, storer);
store(port_, storer);
store(secret_, storer);
} else {
CHECK(type_ == Proxy::Type::None);
}
}
StringBuilder &operator<<(StringBuilder &string_builder, const Proxy &proxy) {
switch (proxy.type()) {
case Proxy::Type::Socks5:
return string_builder << "ProxySocks5 " << proxy.server() << ":" << proxy.port();
case Proxy::Type::Mtproto:
return string_builder << "ProxyMtproto " << proxy.server() << ":" << proxy.port() << "/" << proxy.secret();
case Proxy::Type::None:
return string_builder << "ProxyEmpty";
default:
UNREACHABLE();
return string_builder;
}
}
ConnectionCreator::ClientInfo::ClientInfo() {
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);
}
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(string server, int32 port, bool enable,
td_api::object_ptr<td_api::ProxyType> proxy_type,
Promise<td_api::object_ptr<td_api::proxy>> promise) {
if (proxy_type == nullptr) {
return promise.set_error(Status::Error(400, "Proxy type should not be empty"));
}
if (server.empty()) {
return promise.set_error(Status::Error(400, "Server name can't be empty"));
}
if (port <= 0 || port > 65535) {
return promise.set_error(Status::Error(400, "Wrong port number"));
}
Proxy new_proxy;
switch (proxy_type->get_id()) {
case td_api::proxyTypeSocks5::ID: {
auto type = td_api::move_object_as<td_api::proxyTypeSocks5>(proxy_type);
new_proxy = Proxy::socks5(server, port, type->username_, type->password_);
break;
}
case td_api::proxyTypeMtproto::ID: {
auto type = td_api::move_object_as<td_api::proxyTypeMtproto>(proxy_type);
if (type->secret_.size() != 32 || hex_decode(type->secret_).is_error()) {
return promise.set_error(Status::Error(400, "Wrong server secret"));
}
new_proxy = Proxy::mtproto(server, port, type->secret_);
break;
}
default:
UNREACHABLE();
}
auto proxy_id = [&] {
for (auto &proxy : proxies_) {
if (proxy.second == new_proxy) {
return proxy.first;
}
}
CHECK(max_proxy_id_ >= 2);
auto proxy_id = max_proxy_id_++;
G()->td_db()->get_binlog_pmc()->set("proxy_max_id", to_string(max_proxy_id_));
CHECK(proxies_.count(proxy_id) == 0);
proxies_.emplace(proxy_id, std::move(new_proxy));
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) {
if (proxies_.count(proxy_id) == 0) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
auto &proxy = proxies_[proxy_id];
string url = G()->shared_config().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::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 += url_encode(proxy.secret());
}
promise.set_value(std::move(url));
}
void ConnectionCreator::ping_proxy(int32 proxy_id, Promise<double> promise) {
if (proxies_.count(proxy_id) == 0) {
return promise.set_error(Status::Error(400, "Unknown proxy identifier"));
}
// TODO ping
promise.set_value(0.0);
}
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);
active_proxy_id_ = proxy_id;
G()->td_db()->get_binlog_pmc()->set("proxy_active_id", to_string(proxy_id));
on_proxy_changed(false);
}
void ConnectionCreator::disable_proxy_impl() {
if (active_proxy_id_ == 0) {
on_get_proxy_info(make_tl_object<telegram_api::help_proxyDataEmpty>(0));
return;
}
CHECK(proxies_.count(active_proxy_id_) == 1);
if (proxies_[active_proxy_id_].type() == Proxy::Type::Mtproto) {
update_mtproto_header(Proxy());
}
active_proxy_id_ = 0;
G()->td_db()->get_binlog_pmc()->erase("proxy_active_id");
on_proxy_changed(false);
}
void ConnectionCreator::on_proxy_changed(bool from_db) {
send_closure(G()->state_manager(), &StateManager::on_proxy, active_proxy_id_ != 0);
if (!from_db) {
for (auto &child : children_) {
child.second.reset();
}
}
resolve_proxy_query_token_ = 0;
resolve_proxy_timestamp_ = Timestamp();
proxy_ip_address_ = IPAddress();
get_proxy_info_query_token_ = 0;
get_proxy_info_timestamp_ = Timestamp();
if (active_proxy_id_ == 0 || !from_db) {
on_get_proxy_info(make_tl_object<telegram_api::help_proxyDataEmpty>(0));
} else {
schedule_get_proxy_info(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::Mtproto:
type = make_tl_object<td_api::proxyTypeMtproto>(proxy.secret().str());
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) {
network_flag_ = network_flag;
auto old_generation = network_generation_;
network_generation_ = network_generation;
if (network_flag_) {
resolve_proxy_query_token_ = 0;
resolve_proxy_timestamp_ = Timestamp();
get_proxy_info_timestamp_ = Timestamp();
for (auto &client : clients_) {
client.second.backoff.clear();
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) {
online_flag_ = online_flag;
if (online_flag_) {
for (auto &client : clients_) {
client.second.backoff.clear();
client.second.flood_control_online.clear_events();
client_loop(client.second);
}
}
}
void ConnectionCreator::on_pong(size_t hash) {
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(size_t hash) {
auto &client = clients_[hash];
client.hash = hash;
client.mtproto_error_flood_control.add_event(static_cast<int32>(Time::now_cached()));
}
void ConnectionCreator::request_raw_connection(DcId dc_id, bool allow_media_only, bool is_media,
Promise<std::unique_ptr<mtproto::RawConnection>> promise, size_t hash) {
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);
}
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,
Promise<std::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 raw_connection = std::make_unique<mtproto::RawConnection>(
r_socket_fd.move_as_ok(), mtproto::TransportType{mtproto::TransportType::ObfuscatedTcp, 0, ""}, nullptr);
raw_connection->extra_ = network_generation_;
promise.set_value(std::move(raw_connection));
}
void ConnectionCreator::client_loop(ClientInfo &client) {
CHECK(client.hash != 0);
if (!network_flag_) {
return;
}
if (close_flag_) {
return;
}
Proxy *proxy = active_proxy_id_ == 0 ? nullptr : &proxies_[active_proxy_id_];
auto proxy_type = proxy == nullptr ? Proxy::Type::None : proxy->type();
bool use_proxy = proxy != nullptr;
bool use_socks5_proxy = proxy_type == Proxy::Type::Socks5;
bool use_mtproto_proxy = proxy_type == Proxy::Type::Mtproto;
if (use_proxy && !proxy_ip_address_.is_valid()) {
return;
}
VLOG(connections) << "client_loop: " << tag("client", format::as_hex(client.hash));
// Remove expired ready connections
client.ready_connections.erase(
std::remove_if(client.ready_connections.begin(), client.ready_connections.end(),
[&, expire_at = Time::now_cached() - ClientInfo::READY_CONNECTIONS_TIMEOUT](auto &v) {
bool drop = v.second < expire_at;
VLOG_IF(connections, drop) << "Drop expired " << tag("connection", v.first.get());
return drop;
}),
client.ready_connections.end());
// Send ready connections into promises
{
auto begin = client.queries.begin();
auto it = begin;
while (it != client.queries.end() && !client.ready_connections.empty()) {
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 && !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;
}
}
// Check flood
auto &flood_control = online_flag_ ? client.flood_control_online : client.flood_control;
auto wakeup_at = max(flood_control.get_wakeup_at(), client.mtproto_error_flood_control.get_wakeup_at());
if (!online_flag_) {
wakeup_at = max(wakeup_at, client.backoff.get_wakeup_at());
}
if (wakeup_at > Time::now()) {
return client_set_timeout_at(client, wakeup_at);
}
flood_control.add_event(static_cast<int32>(Time::now()));
if (!online_flag_) {
client.backoff.add_event(static_cast<int32>(Time::now()));
}
// Create new RawConnection
DcOptionsSet::Stat *stat{nullptr};
mtproto::TransportType transport_type;
string debug_str;
IPAddress mtproto_ip;
// sync part
auto allow_media_only = client.allow_media_only;
auto r_socket_fd = [&, dc_id = client.dc_id]() -> Result<SocketFd> {
TRY_RESULT(info, dc_options_set_.find_connection(dc_id, allow_media_only, use_proxy));
stat = info.stat;
int16 raw_dc_id = narrow_cast<int16>(info.option->is_media_only() ? -dc_id.get_raw_id() : dc_id.get_raw_id());
if (use_mtproto_proxy) {
TRY_RESULT(secret, hex_decode(proxy->secret()));
transport_type = {mtproto::TransportType::ObfuscatedTcp, raw_dc_id, std::move(secret)};
debug_str = PSTRING() << "Mtproto " << proxy_ip_address_ << " to DC" << raw_dc_id;
LOG(INFO) << "Create: " << debug_str;
return SocketFd::open(proxy_ip_address_);
}
if (info.use_http) {
transport_type = {mtproto::TransportType::Http, 0, ""};
} else {
transport_type = {mtproto::TransportType::ObfuscatedTcp, raw_dc_id, info.option->get_secret().str()};
}
check_mode |= info.should_check;
if (use_socks5_proxy) {
mtproto_ip = info.option->get_ip_address();
debug_str = PSTRING() << "Socks5 " << proxy_ip_address_ << " --> " << mtproto_ip << " " << dc_id;
LOG(INFO) << "Create: " << debug_str;
return SocketFd::open(proxy_ip_address_);
} else {
debug_str = PSTRING() << info.option->get_ip_address() << " " << dc_id << (info.use_http ? " HTTP" : "")
<< (info.option->is_media_only() ? " MEDIA" : "");
LOG(INFO) << "Create: " << debug_str;
return SocketFd::open(info.option->get_ip_address());
}
}();
if (r_socket_fd.is_error()) {
LOG(WARNING) << r_socket_fd.error();
if (stat) {
stat->on_error(); // TODO: different kind of error
}
return client_set_timeout_at(client, Time::now() + 0.1);
}
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()) {
debug_str = PSTRING() << debug_str << " from " << debug_ip;
} else {
LOG(ERROR) << debug_ip_status;
}
client.pending_connections++;
if (check_mode) {
if (stat) {
stat->on_check();
}
client.checking_connections++;
}
auto promise = PromiseCreator::lambda(
[actor_id = actor_id(this), check_mode, transport_type, hash = client.hash, debug_str,
network_generation = network_generation_](Result<ConnectionData> r_connection_data) mutable {
send_closure(std::move(actor_id), &ConnectionCreator::client_create_raw_connection,
std::move(r_connection_data), check_mode, transport_type, hash, debug_str, network_generation);
});
auto stats_callback = std::make_unique<detail::StatsCallback>(
client.is_media ? media_net_stats_callback_ : common_net_stats_callback_, actor_id(this), client.hash, stat);
if (use_socks5_proxy) {
class Callback : public Socks5::Callback {
public:
explicit Callback(Promise<ConnectionData> promise, std::unique_ptr<detail::StatsCallback> stats_callback)
: promise_(std::move(promise)), stats_callback_(std::move(stats_callback)) {
}
void set_result(Result<SocketFd> result) override {
if (result.is_error()) {
connection_token_ = StateManager::ConnectionToken();
if (was_connected_) {
stats_callback_->on_error();
}
promise_.set_error(result.move_as_error());
} else {
ConnectionData data;
data.socket_fd = result.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() override {
connection_token_ = StateManager::connection_proxy(G()->state_manager());
was_connected_ = true;
}
private:
Promise<ConnectionData> promise_;
StateManager::ConnectionToken connection_token_;
bool was_connected_{false};
std::unique_ptr<detail::StatsCallback> stats_callback_;
};
LOG(INFO) << "Start socks5: " << debug_str;
auto token = next_token();
children_[token] = create_actor<Socks5>(
"Socks5", std::move(socket_fd), mtproto_ip, proxy->user().str(), proxy->password().str(),
std::make_unique<Callback>(std::move(promise), std::move(stats_callback)), create_reference(token));
} else {
ConnectionData data;
data.socket_fd = std::move(socket_fd);
data.stats_callback = std::move(stats_callback);
promise.set_result(std::move(data));
}
}
}
void ConnectionCreator::client_create_raw_connection(Result<ConnectionData> r_connection_data, bool check_mode,
mtproto::TransportType transport_type, size_t hash,
string debug_str, uint32 network_generation) {
auto promise = PromiseCreator::lambda([actor_id = actor_id(this), hash, check_mode,
debug_str](Result<std::unique_ptr<mtproto::RawConnection>> result) mutable {
VLOG(connections) << "Ready connection " << (check_mode ? "(" : "(un") << "checked) "
<< (result.is_ok() ? result.ok().get() : nullptr) << " " << debug_str;
send_closure(std::move(actor_id), &ConnectionCreator::client_add_connection, hash, std::move(result), check_mode);
});
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 = std::make_unique<mtproto::RawConnection>(
std::move(connection_data.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_ = network_generation;
raw_connection->debug_str_ = debug_str;
if (check_mode) {
VLOG(connections) << "Start check: " << debug_str;
auto token = next_token();
children_[token] = create_actor<detail::PingActor>("PingActor", std::move(raw_connection), 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(size_t hash,
Result<std::unique_ptr<mtproto::RawConnection>> r_raw_connection,
bool check_flag) {
auto &client = clients_[hash];
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", hash);
client.backoff.clear();
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]);
}
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::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 : public StateManager::Callback {
public:
explicit StateCallback(ActorId<ConnectionCreator> connection_creator)
: connection_creator_(std::move(connection_creator)) {
}
bool on_network(NetType network_type, uint32 generation) override {
send_closure(connection_creator_, &ConnectionCreator::on_network, network_type != NetType::None, generation);
return connection_creator_.is_alive();
}
bool on_online(bool online_flag) override {
send_closure(connection_creator_, &ConnectionCreator::on_online, online_flag);
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("proxy_max_id");
if (it != proxy_info.end()) {
max_proxy_id_ = to_integer<int32>(it->second);
proxy_info.erase(it);
}
it = proxy_info.find("proxy_active_id");
if (it != proxy_info.end()) {
active_proxy_id_ = to_integer<int32>(it->second);
proxy_info.erase(it);
}
for (auto &info : proxy_info) {
if (begins_with(info.first, "proxy_used")) {
int32 proxy_id = to_integer_safe<int32>(Slice(info.first).substr(10)).move_as_ok();
int32 last_used = to_integer_safe<int32>(info.second).move_as_ok();
proxy_last_used_date_[proxy_id] = last_used;
proxy_last_used_saved_date_[proxy_id] = last_used;
} else {
int32 proxy_id = info.first == "proxy" ? 1 : to_integer_safe<int32>(Slice(info.first).substr(5)).move_as_ok();
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) {
active_proxy_id_ = 0;
G()->td_db()->get_binlog_pmc()->erase("proxy_active_id");
}
}
}
}
if (max_proxy_id_ == 0) {
// legacy one-proxy version
max_proxy_id_ = 2;
if (!proxies_.empty()) {
CHECK(proxies_.begin()->first == 1);
active_proxy_id_ = 1;
G()->td_db()->get_binlog_pmc()->set("proxy_active_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);
}
get_host_by_name_actor_ =
create_actor_on_scheduler<GetHostByNameActor>("GetHostByNameActor", G()->get_gc_scheduler_id(), 5 * 60 - 1, 0);
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.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 (!is_inited_) {
return;
}
if (!network_flag_) {
return;
}
Timestamp timeout;
if (active_proxy_id_ != 0 && proxies_[active_proxy_id_].type() == Proxy::Type::Mtproto) {
if (get_proxy_info_timestamp_.is_in_past()) {
if (get_proxy_info_query_token_ == 0) {
get_proxy_info_query_token_ = next_token();
auto query = G()->net_query_creator().create(create_storer(telegram_api::help_getProxyData()));
G()->net_query_dispatcher().dispatch_with_callback(std::move(query),
actor_shared(this, get_proxy_info_query_token_));
}
} else {
CHECK(get_proxy_info_query_token_ == 0);
timeout.relax(get_proxy_info_timestamp_);
}
}
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_];
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);
}));
}
} else {
CHECK(resolve_proxy_query_token_ == 0);
timeout.relax(resolve_proxy_timestamp_);
}
}
if (timeout) {
set_timeout_at(timeout.at());
}
}
void ConnectionCreator::on_result(NetQueryPtr query) {
if (get_link_token() != get_proxy_info_query_token_) {
return;
}
SCOPE_EXIT {
loop();
};
get_proxy_info_query_token_ = 0;
auto res = fetch_result<telegram_api::help_getProxyData>(std::move(query));
if (res.is_error()) {
if (G()->close_flag()) {
return;
}
LOG(ERROR) << "Receive error for getProxyData: " << res.error();
return schedule_get_proxy_info(60);
}
on_get_proxy_info(res.move_as_ok());
}
void ConnectionCreator::on_get_proxy_info(telegram_api::object_ptr<telegram_api::help_ProxyData> proxy_data_ptr) {
CHECK(proxy_data_ptr != nullptr);
LOG(INFO) << "Receive " << to_string(proxy_data_ptr);
int32 expires = 0;
switch (proxy_data_ptr->get_id()) {
case telegram_api::help_proxyDataEmpty::ID: {
auto proxy = telegram_api::move_object_as<telegram_api::help_proxyDataEmpty>(proxy_data_ptr);
expires = proxy->expires_;
send_closure(G()->messages_manager(), &MessagesManager::on_get_promoted_dialog_id, nullptr,
vector<tl_object_ptr<telegram_api::User>>(), vector<tl_object_ptr<telegram_api::Chat>>());
break;
}
case telegram_api::help_proxyDataPromo::ID: {
auto proxy = telegram_api::move_object_as<telegram_api::help_proxyDataPromo>(proxy_data_ptr);
expires = proxy->expires_;
send_closure(G()->messages_manager(), &MessagesManager::on_get_promoted_dialog_id, std::move(proxy->peer_),
std::move(proxy->users_), std::move(proxy->chats_));
break;
}
default:
UNREACHABLE();
}
if (expires != 0) {
expires -= G()->unix_time();
}
schedule_get_proxy_info(expires);
}
void ConnectionCreator::schedule_get_proxy_info(int32 expires) {
if (expires < 0) {
LOG(ERROR) << "Receive wrong expires: " << expires;
expires = 0;
}
if (expires != 0 && expires < 60) {
expires = 60;
}
if (expires > 86400) {
expires = 86400;
}
get_proxy_info_timestamp_ = Timestamp::in(expires);
}
void ConnectionCreator::on_proxy_resolved(Result<IPAddress> r_ip_address, bool dummy) {
if (get_link_token() != resolve_proxy_query_token_) {
return;
}
SCOPE_EXIT {
loop();
};
resolve_proxy_query_token_ = 0;
if (r_ip_address.is_error()) {
resolve_proxy_timestamp_ = Timestamp::in(1 * 60);
return;
}
proxy_ip_address_ = r_ip_address.move_as_ok();
resolve_proxy_timestamp_ = Timestamp::in(5 * 60);
for (auto &client : clients_) {
client_loop(client.second);
}
}
} // namespace td
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