tdlight/td/telegram/net/ConnectionCreator.h

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//
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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)
//
#pragma once
#include "td/telegram/net/DcId.h"
#include "td/telegram/net/DcOptions.h"
#include "td/telegram/net/DcOptionsSet.h"
#include "td/telegram/net/NetQuery.h"
#include "td/telegram/net/Proxy.h"
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#include "td/telegram/td_api.h"
#include "td/mtproto/AuthData.h"
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#include "td/mtproto/ConnectionManager.h"
#include "td/mtproto/RawConnection.h"
#include "td/mtproto/TransportType.h"
#include "td/net/NetStats.h"
#include "td/actor/actor.h"
#include "td/actor/SignalSlot.h"
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#include "td/utils/BufferedFd.h"
#include "td/utils/common.h"
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#include "td/utils/FlatHashMap.h"
#include "td/utils/FloodControlStrict.h"
#include "td/utils/logging.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/port/SocketFd.h"
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#include "td/utils/Promise.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include "td/utils/Time.h"
#include <map>
#include <memory>
#include <set>
#include <utility>
namespace td {
namespace detail {
class StatsCallback;
} // namespace detail
class GetHostByNameActor;
extern int VERBOSITY_NAME(connections);
class ConnectionCreator final : public NetQueryCallback {
public:
explicit ConnectionCreator(ActorShared<> parent);
ConnectionCreator(ConnectionCreator &&other);
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ConnectionCreator &operator=(ConnectionCreator &&other);
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~ConnectionCreator() final;
void on_dc_options(DcOptions new_dc_options);
void on_dc_update(DcId dc_id, string ip_port, Promise<> promise);
void on_pong(uint32 hash);
void on_mtproto_error(uint32 hash);
void request_raw_connection(DcId dc_id, bool allow_media_only, bool is_media,
Promise<unique_ptr<mtproto::RawConnection>> promise, uint32 hash = 0,
unique_ptr<mtproto::AuthData> auth_data = {});
void request_raw_connection_by_ip(IPAddress ip_address, mtproto::TransportType transport_type,
Promise<unique_ptr<mtproto::RawConnection>> promise);
void set_net_stats_callback(std::shared_ptr<NetStatsCallback> common_callback,
std::shared_ptr<NetStatsCallback> media_callback);
void 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);
void enable_proxy(int32 proxy_id, Promise<Unit> promise);
void disable_proxy(Promise<Unit> promise);
void remove_proxy(int32 proxy_id, Promise<Unit> promise);
void get_proxies(Promise<td_api::object_ptr<td_api::proxies>> promise);
void get_proxy_link(int32 proxy_id, Promise<string> promise);
void ping_proxy(int32 proxy_id, Promise<double> promise);
struct ConnectionData {
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IPAddress ip_address;
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BufferedFd<SocketFd> buffered_socket_fd;
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mtproto::ConnectionManager::ConnectionToken connection_token;
unique_ptr<mtproto::RawConnection::StatsCallback> stats_callback;
};
static DcOptions get_default_dc_options(bool is_test);
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static ActorOwn<> prepare_connection(IPAddress ip_address, SocketFd socket_fd, const Proxy &proxy,
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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);
private:
ActorShared<> parent_;
DcOptionsSet dc_options_set_;
bool network_flag_ = false;
uint32 network_generation_ = 0;
bool online_flag_ = false;
bool is_logging_out_ = false;
bool is_inited_ = false;
static constexpr int32 MAX_PROXY_LAST_USED_SAVE_DELAY = 60;
std::map<int32, Proxy> proxies_;
FlatHashMap<int32, int32> proxy_last_used_date_;
FlatHashMap<int32, int32> proxy_last_used_saved_date_;
int32 max_proxy_id_ = 0;
int32 active_proxy_id_ = 0;
ActorOwn<GetHostByNameActor> get_host_by_name_actor_;
ActorOwn<GetHostByNameActor> block_get_host_by_name_actor_;
IPAddress proxy_ip_address_;
Timestamp resolve_proxy_timestamp_;
uint64 resolve_proxy_query_token_{0};
struct ClientInfo {
class Backoff {
#if TD_ANDROID || TD_DARWIN_IOS || TD_DARWIN_WATCH_OS || TD_TIZEN
static constexpr int32 MAX_BACKOFF = 300;
#else
static constexpr int32 MAX_BACKOFF = 16;
#endif
public:
void add_event(int32 now) {
wakeup_at_ = now + next_delay_;
next_delay_ = min(MAX_BACKOFF, next_delay_ * 2);
}
int32 get_wakeup_at() const {
return wakeup_at_;
}
void clear() {
*this = {};
}
private:
int32 wakeup_at_{0};
int32 next_delay_ = 1;
};
ClientInfo();
int64 extract_session_id();
void add_session_id(int64 session_id);
Backoff backoff;
FloodControlStrict sanity_flood_control;
FloodControlStrict flood_control;
FloodControlStrict flood_control_online;
FloodControlStrict mtproto_error_flood_control;
Slot slot;
size_t pending_connections{0};
size_t checking_connections{0};
std::vector<std::pair<unique_ptr<mtproto::RawConnection>, double>> ready_connections;
std::vector<Promise<unique_ptr<mtproto::RawConnection>>> queries;
static constexpr double READY_CONNECTIONS_TIMEOUT = 10;
bool inited{false};
uint32 hash{0};
DcId dc_id;
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bool allow_media_only{false};
bool is_media{false};
std::set<int64> session_ids_;
unique_ptr<mtproto::AuthData> auth_data;
uint64 auth_data_generation{0};
};
std::map<uint32, ClientInfo> clients_;
std::shared_ptr<NetStatsCallback> media_net_stats_callback_;
std::shared_ptr<NetStatsCallback> common_net_stats_callback_;
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ActorShared<ConnectionCreator> ref_cnt_guard_;
int ref_cnt_{0};
bool close_flag_{false};
uint64 current_token_ = 0;
std::map<uint64, std::pair<bool, ActorShared<>>> children_;
struct PingMainDcRequest {
Promise<double> promise;
size_t left_queries = 0;
Result<double> result;
};
std::map<uint64, PingMainDcRequest> ping_main_dc_requests_;
uint64 next_token() {
return ++current_token_;
}
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ActorShared<ConnectionCreator> create_reference(int64 token);
void set_active_proxy_id(int32 proxy_id, bool from_binlog = false);
void enable_proxy_impl(int32 proxy_id);
void disable_proxy_impl();
void on_proxy_changed(bool from_db);
static string get_proxy_database_key(int32 proxy_id);
static string get_proxy_used_database_key(int32 proxy_id);
void save_proxy_last_used_date(int32 delay);
td_api::object_ptr<td_api::proxy> get_proxy_object(int32 proxy_id) const;
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void start_up() final;
void hangup_shared() final;
void hangup() final;
void loop() final;
void save_dc_options();
Result<SocketFd> do_request_connection(DcId dc_id, bool allow_media_only);
Result<std::pair<unique_ptr<mtproto::RawConnection>, bool>> do_request_raw_connection(DcId dc_id,
bool allow_media_only,
bool is_media, uint32 hash);
void on_network(bool network_flag, uint32 network_generation);
void on_online(bool online_flag);
void on_logging_out(bool is_logging_out);
static void update_mtproto_header(const Proxy &proxy);
void client_wakeup(uint32 hash);
void client_loop(ClientInfo &client);
void client_create_raw_connection(Result<ConnectionData> r_connection_data, bool check_mode,
mtproto::TransportType transport_type, uint32 hash, string debug_str,
uint32 network_generation);
void client_add_connection(uint32 hash, Result<unique_ptr<mtproto::RawConnection>> r_raw_connection, bool check_flag,
uint64 auth_data_generation, int64 session_id);
void client_set_timeout_at(ClientInfo &client, double wakeup_at);
void on_proxy_resolved(Result<IPAddress> ip_address, bool dummy);
struct FindConnectionExtra {
DcOptionsSet::Stat *stat{nullptr};
mtproto::TransportType transport_type;
string debug_str;
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IPAddress ip_address;
IPAddress mtproto_ip_address;
bool check_mode{false};
};
static Result<mtproto::TransportType> get_transport_type(const Proxy &proxy,
const DcOptionsSet::ConnectionInfo &info);
Result<SocketFd> find_connection(const Proxy &proxy, const IPAddress &proxy_ip_address, DcId dc_id,
bool allow_media_only, FindConnectionExtra &extra);
ActorId<GetHostByNameActor> get_dns_resolver();
void ping_proxy_resolved(int32 proxy_id, IPAddress ip_address, Promise<double> promise);
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void ping_proxy_buffered_socket_fd(IPAddress ip_address, BufferedFd<SocketFd> buffered_socket_fd,
mtproto::TransportType transport_type, string debug_str, Promise<double> promise);
void on_ping_main_dc_result(uint64 token, Result<double> result);
};
} // namespace td