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tdlib-fork/td/telegram/Global.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
//
// 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/Global.h"
#include "td/telegram/ConfigShared.h"
#include "td/telegram/net/ConnectionCreator.h"
#include "td/telegram/net/MtprotoHeader.h"
#include "td/telegram/net/NetQueryDispatcher.h"
#include "td/telegram/net/TempAuthKeyWatchdog.h"
#include "td/telegram/StateManager.h"
#include "td/telegram/Td.h"
#include "td/telegram/TdDb.h"
#include "td/actor/PromiseFuture.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/port/Clocks.h"
#include "td/utils/tl_helpers.h"
#include <cmath>
namespace td {
Global::Global() = default;
Global::~Global() = default;
void Global::close_all(Promise<> on_finished) {
td_db_->close_all(std::move(on_finished));
state_manager_.clear();
parameters_ = TdParameters();
}
void Global::close_and_destroy_all(Promise<> on_finished) {
td_db_->close_and_destroy_all(std::move(on_finished));
state_manager_.clear();
parameters_ = TdParameters();
}
ActorId<ConnectionCreator> Global::connection_creator() const {
return connection_creator_.get();
}
void Global::set_connection_creator(ActorOwn<ConnectionCreator> connection_creator) {
connection_creator_ = std::move(connection_creator);
}
ActorId<TempAuthKeyWatchdog> Global::temp_auth_key_watchdog() const {
return temp_auth_key_watchdog_.get();
}
void Global::set_temp_auth_key_watchdog(ActorOwn<TempAuthKeyWatchdog> actor) {
temp_auth_key_watchdog_ = std::move(actor);
}
MtprotoHeader &Global::mtproto_header() {
return *mtproto_header_;
}
void Global::set_mtproto_header(unique_ptr<MtprotoHeader> mtproto_header) {
mtproto_header_ = std::move(mtproto_header);
}
struct ServerTimeDiff {
double diff;
double system_time;
template <class StorerT>
void store(StorerT &storer) const {
using td::store;
store(diff, storer);
store(system_time, storer);
}
template <class ParserT>
void parse(ParserT &parser) {
using td::parse;
parse(diff, parser);
if (parser.get_left_len() != 0) {
parse(system_time, parser);
} else {
system_time = 0;
}
}
};
Status Global::init(const TdParameters &parameters, ActorId<Td> td, unique_ptr<TdDb> td_db_ptr) {
parameters_ = parameters;
gc_scheduler_id_ = min(Scheduler::instance()->sched_id() + 2, Scheduler::instance()->sched_count() - 1);
slow_net_scheduler_id_ = min(Scheduler::instance()->sched_id() + 3, Scheduler::instance()->sched_count() - 1);
td_ = td;
td_db_ = std::move(td_db_ptr);
string saved_diff_str = td_db()->get_binlog_pmc()->get("server_time_difference");
auto system_time = Clocks::system();
auto default_time_difference = system_time - Time::now();
if (saved_diff_str.empty()) {
server_time_difference_ = default_time_difference;
} else {
ServerTimeDiff saved_diff;
unserialize(saved_diff, saved_diff_str).ensure();
saved_diff_ = saved_diff.diff;
saved_system_time_ = saved_diff.system_time;
double diff = saved_diff.diff + default_time_difference;
if (saved_diff.system_time > system_time) {
double time_backwards_fix = saved_diff.system_time - system_time;
if (time_backwards_fix > 60) {
LOG(WARNING) << "Fix system time which went backwards: " << format::as_time(time_backwards_fix) << " "
<< tag("saved_system_time", saved_diff.system_time) << tag("system_time", system_time);
}
diff += time_backwards_fix;
} else if (saved_diff.system_time != 0) {
const double MAX_TIME_FORWARD = 367 * 86400; // if more than 1 year has passed, the session is logged out anyway
if (saved_diff.system_time + MAX_TIME_FORWARD < system_time) {
double time_forward_fix = system_time - (saved_diff.system_time + MAX_TIME_FORWARD);
LOG(WARNING) << "Fix system time which went forward: " << format::as_time(time_forward_fix) << " "
<< tag("saved_system_time", saved_diff.system_time) << tag("system_time", system_time);
diff -= time_forward_fix;
}
} else if (saved_diff.diff >= 1500000000 && system_time >= 1500000000) { // only for saved_diff.system_time == 0
diff = default_time_difference;
}
LOG(DEBUG) << "LOAD: " << tag("server_time_difference", diff);
server_time_difference_ = diff;
}
server_time_difference_was_updated_ = false;
dns_time_difference_ = default_time_difference;
dns_time_difference_was_updated_ = false;
return Status::OK();
}
int32 Global::to_unix_time(double server_time) const {
LOG_CHECK(1.0 <= server_time && server_time <= 2140000000.0)
<< server_time << " " << Clocks::system() << " " << is_server_time_reliable() << " "
<< get_server_time_difference() << " " << Time::now() << saved_diff_ << " " << saved_system_time_;
return static_cast<int32>(server_time);
}
void Global::update_server_time_difference(double diff) {
if (!server_time_difference_was_updated_ || server_time_difference_ < diff) {
server_time_difference_ = diff;
server_time_difference_was_updated_ = true;
do_save_server_time_difference();
CHECK(Scheduler::instance());
send_closure(td(), &Td::on_update_server_time_difference);
}
}
void Global::save_server_time() {
auto t = Time::now();
if (server_time_difference_was_updated_ && system_time_saved_at_.load(std::memory_order_relaxed) + 10 < t) {
system_time_saved_at_ = t;
do_save_server_time_difference();
}
}
void Global::do_save_server_time_difference() {
// diff = server_time - Time::now
// fixed_diff = server_time - Clocks::system
double system_time = Clocks::system();
double fixed_diff = server_time_difference_ + Time::now() - system_time;
ServerTimeDiff diff;
diff.diff = fixed_diff;
diff.system_time = system_time;
td_db()->get_binlog_pmc()->set("server_time_difference", serialize(diff));
}
void Global::update_dns_time_difference(double diff) {
dns_time_difference_ = diff;
dns_time_difference_was_updated_ = true;
}
double Global::get_dns_time_difference() const {
bool dns_flag = dns_time_difference_was_updated_;
double dns_diff = dns_time_difference_;
bool server_flag = server_time_difference_was_updated_;
double server_diff = server_time_difference_;
if (dns_flag != server_flag) {
return dns_flag ? dns_diff : server_diff;
}
if (dns_flag) {
return max(dns_diff, server_diff);
}
if (td_db_) {
return server_diff;
}
return Clocks::system() - Time::now();
}
DcId Global::get_webfile_dc_id() const {
CHECK(shared_config_ != nullptr);
int32 dc_id = shared_config_->get_option_integer("webfile_dc_id");
if (!DcId::is_valid(dc_id)) {
if (is_test_dc()) {
dc_id = 2;
} else {
dc_id = 4;
}
CHECK(DcId::is_valid(dc_id));
}
return DcId::internal(dc_id);
}
bool Global::ignore_backgrond_updates() const {
return !parameters_.use_file_db && !parameters_.use_secret_chats &&
shared_config_->get_option_boolean("ignore_background_updates");
}
void Global::set_net_query_dispatcher(unique_ptr<NetQueryDispatcher> net_query_dispatcher) {
net_query_dispatcher_ = std::move(net_query_dispatcher);
}
void Global::set_shared_config(unique_ptr<ConfigShared> shared_config) {
shared_config_ = std::move(shared_config);
}
int64 Global::get_location_key(double latitude, double longitude) {
const double PI = 3.14159265358979323846;
latitude *= PI / 180;
longitude *= PI / 180;
int64 key = 0;
if (latitude < 0) {
latitude = -latitude;
key = 65536;
}
double f = std::tan(PI / 4 - latitude / 2);
key += static_cast<int64>(f * std::cos(longitude) * 128) * 256;
key += static_cast<int64>(f * std::sin(longitude) * 128);
return key;
}
int64 Global::get_location_access_hash(double latitude, double longitude) {
auto it = location_access_hashes_.find(get_location_key(latitude, longitude));
if (it == location_access_hashes_.end()) {
return 0;
}
return it->second;
}
void Global::add_location_access_hash(double latitude, double longitude, int64 access_hash) {
if (access_hash == 0) {
return;
}
location_access_hashes_[get_location_key(latitude, longitude)] = access_hash;
}
double get_server_time() {
return G()->server_time();
}
} // namespace td