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tdlib-fork/td/telegram/net/ConnectionCreator.h

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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)
//
#pragma once
#include "td/telegram/td_api.h"
#include "td/telegram/net/DcOptions.h"
#include "td/telegram/net/DcOptionsSet.h"
#include "td/telegram/net/NetQuery.h"
#include "td/telegram/StateManager.h"
#include "td/mtproto/IStreamTransport.h"
#include "td/actor/actor.h"
#include "td/actor/PromiseFuture.h"
#include "td/actor/SignalSlot.h"
#include "td/net/NetStats.h"
#include "td/utils/FloodControlStrict.h"
#include "td/utils/logging.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/port/SocketFd.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include "td/utils/Time.h"
#include <map>
#include <memory>
#include <utility>
namespace td {
namespace mtproto {
class RawConnection;
} // namespace mtproto
namespace detail {
class StatsCallback;
}
class GetHostByNameActor;
} // namespace td
namespace td {
class Proxy {
public:
tl_object_ptr<td_api::Proxy> as_td_api() const {
switch (type_) {
case Type::None:
return make_tl_object<td_api::proxyEmpty>();
case Type::Socks5:
return make_tl_object<td_api::proxySocks5>(server_, port_, user_, password_);
case Type::Mtproto:
return make_tl_object<td_api::proxyMtproto>(server_, port_, secret_);
}
UNREACHABLE();
return nullptr;
}
static Proxy from_td_api(const tl_object_ptr<td_api::Proxy> &proxy) {
if (proxy == nullptr) {
return Proxy();
}
switch (proxy->get_id()) {
case td_api::proxyEmpty::ID:
return Proxy();
case td_api::proxySocks5::ID: {
auto &socks5_proxy = static_cast<const td_api::proxySocks5 &>(*proxy);
return Proxy::socks5(socks5_proxy.server_, socks5_proxy.port_, socks5_proxy.username_, socks5_proxy.password_);
}
case td_api::proxyMtproto::ID: {
auto &mtproto_proxy = static_cast<const td_api::proxyMtproto &>(*proxy);
return Proxy::mtproto(mtproto_proxy.server_, mtproto_proxy.port_, mtproto_proxy.secret_);
}
}
UNREACHABLE();
return Proxy();
}
static Proxy socks5(string server, int32 port, string user, string password) {
Proxy proxy;
proxy.type_ = Type::Socks5;
proxy.server_ = std::move(server);
proxy.port_ = std::move(port);
proxy.user_ = std::move(user);
proxy.password_ = std::move(password);
return proxy;
}
static Proxy mtproto(string server, int32 port, string secret) {
Proxy proxy;
proxy.type_ = Type::Mtproto;
proxy.server_ = std::move(server);
proxy.port_ = std::move(port);
proxy.secret_ = std::move(secret);
return proxy;
}
CSlice server() const {
return server_;
}
int32 port() const {
return port_;
}
CSlice user() const {
return user_;
}
CSlice password() const {
return password_;
}
CSlice secret() const {
return secret_;
}
enum class Type : int32 { None, Socks5, Mtproto };
Type type() const {
return type_;
}
template <class T>
void parse(T &parser);
template <class T>
void store(T &storer) const;
private:
Type type_{Type::None};
string server_;
int32 port_ = 0;
string user_;
string password_;
string secret_;
};
inline bool operator==(const Proxy &lhs, const Proxy &rhs) {
return lhs.type() == rhs.type() && lhs.server() == rhs.server() && lhs.port() == rhs.port() &&
lhs.user() == rhs.user() && lhs.password() == rhs.password() && lhs.secret() == rhs.secret();
}
inline bool operator!=(const Proxy &lhs, const Proxy &rhs) {
return !(lhs == rhs);
}
class ConnectionCreator : public NetQueryCallback {
public:
explicit ConnectionCreator(ActorShared<> parent);
ConnectionCreator(ConnectionCreator &&other);
ConnectionCreator &operator=(ConnectionCreator &&other);
~ConnectionCreator() override;
void on_dc_options(DcOptions new_dc_options);
void on_dc_update(DcId dc_id, string ip_port, Promise<> promise);
void on_mtproto_error(size_t hash);
void request_raw_connection(DcId dc_id, bool allow_media_only, bool is_media,
Promise<std::unique_ptr<mtproto::RawConnection>> promise, size_t hash = 0);
void request_raw_connection_by_ip(IPAddress ip_address, Promise<std::unique_ptr<mtproto::RawConnection>> promise);
void set_net_stats_callback(std::shared_ptr<NetStatsCallback> common_callback,
std::shared_ptr<NetStatsCallback> media_callback);
void set_proxy(Proxy proxy);
void get_proxy(Promise<Proxy> promise);
private:
ActorShared<> parent_;
DcOptionsSet dc_options_set_;
bool network_flag_ = false;
uint32 network_generation_ = 0;
bool online_flag_ = false;
Proxy proxy_;
ActorOwn<GetHostByNameActor> get_host_by_name_actor_;
IPAddress proxy_ip_address_;
Timestamp resolve_proxy_timestamp_;
uint64 resolve_proxy_query_token_{0};
uint64 get_proxy_info_query_token_{0};
Timestamp get_proxy_info_timestamp_;
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();
Backoff backoff;
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<std::unique_ptr<mtproto::RawConnection>, double>> ready_connections;
std::vector<Promise<std::unique_ptr<mtproto::RawConnection>>> queries;
static constexpr double READY_CONNECTIONS_TIMEOUT = 10;
bool inited{false};
size_t hash{0};
DcId dc_id;
bool allow_media_only;
bool is_media;
};
std::map<size_t, ClientInfo> clients_;
std::shared_ptr<NetStatsCallback> media_net_stats_callback_;
std::shared_ptr<NetStatsCallback> common_net_stats_callback_;
ActorShared<> ref_cnt_guard_;
int ref_cnt_{0};
ActorShared<ConnectionCreator> create_reference(int64 token);
bool close_flag_{false};
uint64 current_token_ = 0;
std::map<int64, ActorShared<>> children_;
uint64 next_token() {
return ++current_token_;
}
void set_proxy_impl(Proxy proxy, bool from_db);
void start_up() override;
void hangup_shared() override;
void hangup() override;
void loop() override;
void on_result(NetQueryPtr query) override;
void save_dc_options();
Result<SocketFd> do_request_connection(DcId dc_id, bool allow_media_only);
Result<std::pair<std::unique_ptr<mtproto::RawConnection>, bool>> do_request_raw_connection(DcId dc_id,
bool allow_media_only,
bool is_media,
size_t hash);
void on_network(bool network_flag, uint32 network_generation);
void on_online(bool online_flag);
void client_wakeup(size_t hash);
void client_loop(ClientInfo &client);
struct ConnectionData {
SocketFd socket_fd;
StateManager::ConnectionToken connection_token;
std::unique_ptr<detail::StatsCallback> stats_callback;
};
void 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);
void client_add_connection(size_t hash, Result<std::unique_ptr<mtproto::RawConnection>> r_raw_connection,
bool check_flag);
void client_set_timeout_at(ClientInfo &client, double wakeup_at);
void on_get_proxy_info(telegram_api::object_ptr<telegram_api::help_ProxyData> proxy_data_ptr);
void schedule_get_proxy_info(int32 expires);
void on_proxy_resolved(Result<IPAddress> ip_address, bool dummy);
static DcOptions get_default_dc_options(bool is_test);
};
} // namespace td