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tdlight/td/telegram/net/Session.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2024
//
// 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/Session.h"
#include "td/telegram/DhCache.h"
#include "td/telegram/Global.h"
#include "td/telegram/net/DcAuthManager.h"
#include "td/telegram/net/DcId.h"
#include "td/telegram/net/MtprotoHeader.h"
#include "td/telegram/net/NetQuery.h"
#include "td/telegram/net/NetQueryDispatcher.h"
#include "td/telegram/net/NetType.h"
#include "td/telegram/StateManager.h"
#include "td/telegram/telegram_api.h"
#include "td/telegram/UniqueId.h"
#include "td/mtproto/DhCallback.h"
#include "td/mtproto/Handshake.h"
#include "td/mtproto/HandshakeActor.h"
#include "td/mtproto/RawConnection.h"
#include "td/mtproto/RSA.h"
#include "td/mtproto/SessionConnection.h"
#include "td/mtproto/TransportType.h"
#include "td/actor/PromiseFuture.h"
#include "td/utils/algorithm.h"
#include "td/utils/as.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/port/thread_local.h"
#include "td/utils/Random.h"
#include "td/utils/Slice.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Span.h"
#include "td/utils/Time.h"
#include "td/utils/Timer.h"
#include "td/utils/tl_parsers.h"
#include "td/utils/utf8.h"
#include "td/utils/VectorQueue.h"
#include <atomic>
#include <memory>
#include <tuple>
#include <utility>
namespace td {
namespace detail {
class SemaphoreActor final : public Actor {
public:
explicit SemaphoreActor(size_t capacity) : capacity_(capacity) {
}
void execute(Promise<Promise<Unit>> promise) {
if (capacity_ == 0) {
pending_.push(std::move(promise));
} else {
start(std::move(promise));
}
}
private:
size_t capacity_;
VectorQueue<Promise<Promise<Unit>>> pending_;
void finish(Result<Unit>) {
capacity_++;
if (!pending_.empty()) {
start(pending_.pop());
}
}
void start(Promise<Promise<Unit>> promise) {
CHECK(capacity_ > 0);
capacity_--;
promise.set_value(promise_send_closure(actor_id(this), &SemaphoreActor::finish));
}
};
struct Semaphore {
explicit Semaphore(size_t capacity) {
semaphore_ = create_actor<SemaphoreActor>("Semaphore", capacity).release();
}
void execute(Promise<Promise<Unit>> promise) {
send_closure(semaphore_, &SemaphoreActor::execute, std::move(promise));
}
private:
ActorId<SemaphoreActor> semaphore_;
};
class GenAuthKeyActor final : public Actor {
public:
GenAuthKeyActor(Slice name, unique_ptr<mtproto::AuthKeyHandshake> handshake,
unique_ptr<mtproto::AuthKeyHandshakeContext> context,
Promise<unique_ptr<mtproto::RawConnection>> connection_promise,
Promise<unique_ptr<mtproto::AuthKeyHandshake>> handshake_promise,
std::shared_ptr<Session::Callback> callback)
: name_(name.str())
, handshake_(std::move(handshake))
, context_(std::move(context))
, connection_promise_(std::move(connection_promise))
, handshake_promise_(std::move(handshake_promise))
, callback_(std::move(callback)) {
if (actor_count_.fetch_add(1, std::memory_order_relaxed) == MIN_HIGH_LOAD_ACTOR_COUNT - 1) {
LOG(WARNING) << "Number of GenAuthKeyActor exceeded high-load threshold";
}
}
GenAuthKeyActor(const GenAuthKeyActor &) = delete;
GenAuthKeyActor &operator=(const GenAuthKeyActor &) = delete;
GenAuthKeyActor(GenAuthKeyActor &&) = delete;
GenAuthKeyActor &operator=(GenAuthKeyActor &&) = delete;
~GenAuthKeyActor() final {
if (actor_count_.fetch_sub(1, std::memory_order_relaxed) == MIN_HIGH_LOAD_ACTOR_COUNT) {
LOG(WARNING) << "Number of GenAuthKeyActor became lower than high-load threshold";
}
}
static bool is_high_loaded() {
return actor_count_.load(std::memory_order_relaxed) >= MIN_HIGH_LOAD_ACTOR_COUNT;
}
void on_network(uint32 network_generation) {
if (network_generation_ != network_generation) {
send_closure(std::move(child_), &mtproto::HandshakeActor::close);
}
}
private:
string name_;
uint32 network_generation_ = 0;
unique_ptr<mtproto::AuthKeyHandshake> handshake_;
unique_ptr<mtproto::AuthKeyHandshakeContext> context_;
Promise<unique_ptr<mtproto::RawConnection>> connection_promise_;
Promise<unique_ptr<mtproto::AuthKeyHandshake>> handshake_promise_;
std::shared_ptr<Session::Callback> callback_;
CancellationTokenSource cancellation_token_source_;
ActorOwn<mtproto::HandshakeActor> child_;
Promise<Unit> finish_promise_;
static constexpr size_t MIN_HIGH_LOAD_ACTOR_COUNT = 100;
static std::atomic<size_t> actor_count_;
static TD_THREAD_LOCAL Semaphore *semaphore_;
Semaphore &get_handshake_semaphore() {
auto old_context = set_context(std::make_shared<ActorContext>());
auto old_tag = set_tag(string());
init_thread_local<Semaphore>(semaphore_, 50);
set_context(std::move(old_context));
set_tag(std::move(old_tag));
return *semaphore_;
}
void start_up() final {
// Bug in Android clang and MSVC
// std::tuple<Result<int>> b(std::forward_as_tuple(Result<int>()));
get_handshake_semaphore().execute(promise_send_closure(actor_id(this), &GenAuthKeyActor::do_start_up));
}
void do_start_up(Result<Promise<Unit>> r_finish_promise) {
if (r_finish_promise.is_error()) {
LOG(ERROR) << "Unexpected error: " << r_finish_promise.error();
} else {
finish_promise_ = r_finish_promise.move_as_ok();
}
callback_->request_raw_connection(
nullptr, PromiseCreator::cancellable_lambda(
cancellation_token_source_.get_cancellation_token(),
[actor_id = actor_id(this)](Result<unique_ptr<mtproto::RawConnection>> r_raw_connection) {
send_closure(actor_id, &GenAuthKeyActor::on_connection, std::move(r_raw_connection), false);
}));
}
void hangup() final {
if (connection_promise_) {
connection_promise_.set_error(Status::Error(1, "Canceled"));
}
if (handshake_promise_) {
handshake_promise_.set_error(Status::Error(1, "Canceled"));
}
stop();
}
void on_connection(Result<unique_ptr<mtproto::RawConnection>> r_raw_connection, bool dummy) {
if (r_raw_connection.is_error()) {
connection_promise_.set_error(r_raw_connection.move_as_error());
handshake_promise_.set_value(std::move(handshake_));
return;
}
auto raw_connection = r_raw_connection.move_as_ok();
VLOG(dc) << "Receive raw connection " << raw_connection.get();
network_generation_ = raw_connection->extra().extra;
child_ = create_actor_on_scheduler<mtproto::HandshakeActor>(
PSLICE() << name_ + "::HandshakeActor", G()->get_slow_net_scheduler_id(), std::move(handshake_),
std::move(raw_connection), std::move(context_), 10, std::move(connection_promise_),
std::move(handshake_promise_));
}
};
std::atomic<size_t> GenAuthKeyActor::actor_count_;
TD_THREAD_LOCAL Semaphore *GenAuthKeyActor::semaphore_{};
} // namespace detail
void Session::PriorityQueue::push(NetQueryPtr query) {
auto priority = query->priority();
queries_[priority].push(std::move(query));
}
NetQueryPtr Session::PriorityQueue::pop() {
CHECK(!empty());
auto it = queries_.begin();
auto res = it->second.pop();
if (it->second.empty()) {
queries_.erase(it);
}
return res;
}
bool Session::PriorityQueue::empty() const {
return queries_.empty();
}
Session::Session(unique_ptr<Callback> callback, std::shared_ptr<AuthDataShared> shared_auth_data, int32 raw_dc_id,
int32 dc_id, bool is_primary, bool is_main, bool use_pfs, bool persist_tmp_auth_key, bool is_cdn,
bool need_destroy_auth_key, const mtproto::AuthKey &tmp_auth_key,
const vector<mtproto::ServerSalt> &server_salts)
: raw_dc_id_(raw_dc_id)
, dc_id_(dc_id)
, is_primary_(is_primary)
, is_main_(is_main)
, persist_tmp_auth_key_(use_pfs && persist_tmp_auth_key)
, is_cdn_(is_cdn)
, need_destroy_auth_key_(need_destroy_auth_key) {
VLOG(dc) << "Start connection " << tag("need_destroy_auth_key", need_destroy_auth_key_);
if (need_destroy_auth_key_) {
use_pfs = false;
CHECK(!is_cdn);
}
shared_auth_data_ = std::move(shared_auth_data);
auth_data_.set_use_pfs(use_pfs);
auth_data_.set_main_auth_key(shared_auth_data_->get_auth_key());
// auth_data_.break_main_auth_key();
auth_data_.reset_server_time_difference(shared_auth_data_->get_server_time_difference());
auto now = Time::now();
auth_data_.set_future_salts(shared_auth_data_->get_future_salts(), now);
if (use_pfs && !tmp_auth_key.empty()) {
auth_data_.set_tmp_auth_key(tmp_auth_key);
if (is_main_) {
registered_temp_auth_key_ = TempAuthKeyWatchdog::register_auth_key_id(auth_data_.get_tmp_auth_key().id());
}
auth_data_.set_future_salts(server_salts, now);
}
uint64 session_id = 0;
do {
Random::secure_bytes(reinterpret_cast<uint8 *>(&session_id), sizeof(session_id));
} while (session_id == 0);
auth_data_.set_session_id(session_id);
use_pfs_ = use_pfs;
LOG(WARNING) << "Generate new session_id " << session_id << " for " << (use_pfs ? "temp " : "")
<< (is_cdn ? "CDN " : "") << "auth key " << auth_data_.get_auth_key().id() << " for "
<< (is_main_ ? "main " : "") << "DC" << dc_id;
callback_ = std::shared_ptr<Callback>(callback.release());
main_connection_.connection_id_ = 0;
long_poll_connection_.connection_id_ = 1;
if (is_cdn) {
auth_data_.set_header(G()->mtproto_header().get_anonymous_header());
} else {
auth_data_.set_header(G()->mtproto_header().get_default_header());
}
last_activity_timestamp_ = now;
last_success_timestamp_ = now - 366 * 86400;
last_bind_success_timestamp_ = now - 366 * 86400;
}
bool Session::is_high_loaded() {
return detail::GenAuthKeyActor::is_high_loaded();
}
bool Session::can_destroy_auth_key() const {
return need_destroy_auth_key_;
}
void Session::start_up() {
class StateCallback final : public StateManager::Callback {
public:
explicit StateCallback(ActorId<Session> session) : session_(std::move(session)) {
}
bool on_network(NetType network_type, uint32 network_generation) final {
send_closure(session_, &Session::on_network, network_type != NetType::None, network_generation);
return session_.is_alive();
}
bool on_online(bool online_flag) final {
send_closure(session_, &Session::on_online, online_flag);
return session_.is_alive();
}
bool on_logging_out(bool logging_out_flag) final {
send_closure(session_, &Session::on_logging_out, logging_out_flag);
return session_.is_alive();
}
private:
ActorId<Session> session_;
};
send_closure(G()->state_manager(), &StateManager::add_callback, make_unique<StateCallback>(actor_id(this)));
yield();
}
void Session::on_network(bool network_flag, uint32 network_generation) {
was_on_network_ = true;
network_flag_ = network_flag;
if (network_generation_ != network_generation) {
network_generation_ = network_generation;
connection_close(&main_connection_);
connection_close(&long_poll_connection_);
}
for (auto &handshake_info : handshake_info_) {
if (handshake_info.actor_.empty()) {
continue;
}
send_closure(handshake_info.actor_, &detail::GenAuthKeyActor::on_network, network_generation);
}
loop();
}
void Session::on_online(bool online_flag) {
LOG(DEBUG) << "Set online flag to " << online_flag;
online_flag_ = online_flag;
connection_online_update(Time::now(), true);
loop();
}
void Session::on_logging_out(bool logging_out_flag) {
LOG(DEBUG) << "Set logging out flag to " << logging_out_flag;
logging_out_flag_ = logging_out_flag;
connection_online_update(Time::now(), true);
loop();
}
void Session::connection_online_update(double now, bool force) {
bool new_connection_online_flag =
(online_flag_ || logging_out_flag_) && (has_queries() || last_activity_timestamp_ + 10 > now || is_primary_);
if (connection_online_flag_ == new_connection_online_flag && !force) {
return;
}
connection_online_flag_ = new_connection_online_flag;
VLOG(dc) << "Set connection_online " << connection_online_flag_;
if (main_connection_.connection_) {
main_connection_.connection_->set_online(connection_online_flag_, is_primary_);
}
if (long_poll_connection_.connection_) {
long_poll_connection_.connection_->set_online(connection_online_flag_, is_primary_);
}
}
void Session::send(NetQueryPtr &&query) {
last_activity_timestamp_ = Time::now();
// query->debug(PSTRING() << get_name() << ": received from SessionProxy");
query->set_session_id(auth_data_.get_session_id());
VLOG(net_query) << "Receive query " << query;
if (query->update_is_ready()) {
return_query(std::move(query));
return;
}
add_query(std::move(query));
loop();
}
void Session::on_bind_result(NetQueryPtr query) {
LOG(INFO) << "Receive answer to BindKey: " << query;
being_binded_tmp_auth_key_id_ = 0;
last_bind_query_id_ = 0;
Status status;
if (query->is_error()) {
status = query->move_as_error();
if (status.code() == 400 && status.message() == "ENCRYPTED_MESSAGE_INVALID") {
auto server_time = G()->server_time();
auto auth_key_creation_date = auth_data_.get_main_auth_key().created_at();
auto auth_key_age = server_time - auth_key_creation_date;
auto is_server_time_reliable = G()->is_server_time_reliable();
auto last_success_time = use_pfs_ ? last_bind_success_timestamp_ : last_success_timestamp_;
auto now = Time::now();
bool has_immunity =
!is_server_time_reliable || auth_key_age < 60 || (auth_key_age > 86400 && last_success_time > now - 86400);
auto debug = PSTRING() << ". Server time is " << server_time << ", auth key created at " << auth_key_creation_date
<< ", is_server_time_reliable = " << is_server_time_reliable << ", use_pfs = " << use_pfs_
<< ", last_success_time = " << last_success_time << ", now = " << now;
if (!use_pfs_) {
if (has_immunity) {
LOG(WARNING) << "Do not drop main key, because it was created too recently" << debug;
} else {
LOG(WARNING) << "Drop main key because check with temporary key failed" << debug;
auth_data_.drop_main_auth_key();
on_auth_key_updated();
G()->log_out("Main authorization key is invalid");
}
} else {
if (has_immunity) {
LOG(WARNING) << "Do not validate main key, because it was created too recently" << debug;
} else {
need_check_main_key_ = true;
auth_data_.set_use_pfs(false);
LOG(WARNING) << "Receive ENCRYPTED_MESSAGE_INVALID error, validate main key" << debug;
}
}
}
} else {
auto answer = query->move_as_ok();
auto r_flag = fetch_result<telegram_api::auth_bindTempAuthKey>(answer);
if (r_flag.is_error()) {
status = r_flag.move_as_error();
} else if (!r_flag.ok()) {
status = Status::Error("Returned false");
}
}
if (status.is_ok()) {
LOG(INFO) << "Bound temp auth key " << auth_data_.get_tmp_auth_key().id();
auth_data_.on_bind();
last_bind_success_timestamp_ = Time::now();
on_tmp_auth_key_updated();
} else if (status.message() == "DispatchTtlError") {
LOG(INFO) << "Resend bind auth key " << auth_data_.get_tmp_auth_key().id() << " request after DispatchTtlError";
} else {
LOG(ERROR) << "BindKey failed: " << status;
connection_close(&main_connection_);
connection_close(&long_poll_connection_);
}
yield();
}
void Session::on_check_key_result(NetQueryPtr query) {
LOG(INFO) << "Receive answer to GetNearestDc: " << query;
being_checked_main_auth_key_id_ = 0;
last_check_query_id_ = 0;
Status status;
if (query->is_error()) {
status = query->move_as_error();
} else {
auto answer = query->move_as_ok();
auto r_flag = fetch_result<telegram_api::help_getNearestDc>(answer);
if (r_flag.is_error()) {
status = r_flag.move_as_error();
}
}
if (status.is_ok() || status.code() != -404) {
LOG(INFO) << "Check main key ok";
need_check_main_key_ = false;
auth_data_.set_use_pfs(true);
} else {
LOG(ERROR) << "Check main key failed: " << status;
connection_close(&main_connection_);
connection_close(&long_poll_connection_);
}
yield();
}
void Session::on_result(NetQueryPtr query) {
CHECK(UniqueId::extract_type(query->id()) == UniqueId::BindKey);
if (last_bind_query_id_ == query->id()) {
return on_bind_result(std::move(query));
}
if (last_check_query_id_ == query->id()) {
return on_check_key_result(std::move(query));
}
query->clear();
}
void Session::return_query(NetQueryPtr &&query) {
last_activity_timestamp_ = Time::now();
query->set_session_id(0);
callback_->on_result(std::move(query));
}
void Session::flush_pending_invoke_after_queries() {
while (!pending_invoke_after_queries_.empty()) {
auto &query = pending_invoke_after_queries_.front();
pending_queries_.push(std::move(query));
pending_invoke_after_queries_.pop_front();
}
}
void Session::close() {
LOG(INFO) << "Close session (external)";
close_flag_ = true;
connection_close(&main_connection_);
connection_close(&long_poll_connection_);
for (auto &it : sent_queries_) {
auto &query = it.second.net_query_;
query->set_message_id(0);
pending_queries_.push(std::move(query));
}
sent_queries_.clear();
sent_containers_.clear();
flush_pending_invoke_after_queries();
CHECK(sent_queries_.empty());
while (!pending_queries_.empty()) {
auto query = pending_queries_.pop();
query->set_error_resend();
return_query(std::move(query));
}
callback_->on_closed();
stop();
}
void Session::hangup() {
LOG(DEBUG) << "HANGUP";
close();
}
void Session::raw_event(const Event::Raw &event) {
auto message_id = mtproto::MessageId(event.u64);
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
return;
}
dec_container(it->first, &it->second);
mark_as_known(it->first, &it->second);
auto query = std::move(it->second.net_query_);
LOG(DEBUG) << "Drop answer for " << query;
query->set_message_id(0);
sent_queries_.erase(it);
return_query(std::move(query));
if (main_connection_.state_ == ConnectionInfo::State::Ready) {
main_connection_.connection_->cancel_answer(message_id);
} else {
to_cancel_message_ids_.push_back(message_id);
}
loop();
}
/** Connection::Callback **/
void Session::on_connected() {
if (is_main_) {
connection_token_ =
mtproto::ConnectionManager::connection(static_cast<ActorId<mtproto::ConnectionManager>>(G()->state_manager()));
}
}
Status Session::on_pong(double ping_time, double pong_time) {
constexpr int MAX_QUERY_TIMEOUT = 60;
constexpr int MIN_CONNECTION_ACTIVE = 60;
if (current_info_ == &main_connection_ &&
Timestamp::at(current_info_->created_at_ + MIN_CONNECTION_ACTIVE).is_in_past()) {
Status status;
if (!unknown_queries_.empty()) {
status = Status::Error(PSLICE() << "No state info for " << unknown_queries_.size() << " queries from auth key "
<< auth_data_.get_auth_key().id() << " for "
<< format::as_time(Time::now() - current_info_->created_at_)
<< " after ping sent at " << ping_time << " and answered at " << pong_time);
}
if (!sent_queries_list_.empty()) {
for (auto it = sent_queries_list_.prev; it != &sent_queries_list_; it = it->prev) {
auto query = Query::from_list_node(it);
if (Timestamp::at(query->sent_at_ + MAX_QUERY_TIMEOUT).is_in_past()) {
if (status.is_ok()) {
status =
Status::Error(PSLICE() << "No answer from auth key " << auth_data_.get_auth_key().id() << " for "
<< query->net_query_ << " for " << format::as_time(Time::now() - query->sent_at_)
<< " after ping sent at " << ping_time << " and answered at " << pong_time);
}
query->is_acknowledged_ = false;
} else {
break;
}
}
}
return status;
}
return Status::OK();
}
void Session::on_auth_key_updated() {
shared_auth_data_->set_auth_key(auth_data_.get_main_auth_key());
}
void Session::on_tmp_auth_key_updated() {
callback_->on_tmp_auth_key_updated(auth_data_.get_tmp_auth_key());
}
void Session::on_server_salt_updated() {
if (auth_data_.use_pfs()) {
callback_->on_server_salt_updated(auth_data_.get_future_salts());
return;
}
shared_auth_data_->set_future_salts(auth_data_.get_future_salts());
}
void Session::on_server_time_difference_updated(bool force) {
shared_auth_data_->update_server_time_difference(auth_data_.get_server_time_difference(), force);
}
void Session::on_closed(Status status) {
if (!close_flag_ && is_main_) {
connection_token_.reset();
}
auto raw_connection = current_info_->connection_->move_as_raw_connection();
Scheduler::unsubscribe_before_close(raw_connection->get_poll_info().get_pollable_fd_ref());
raw_connection->close();
if (status.is_error() && status.code() == -404) {
if (auth_data_.use_pfs()) {
LOG(WARNING) << "Invalidate tmp_key";
auth_data_.drop_tmp_auth_key();
on_tmp_auth_key_updated();
yield();
} else if (is_cdn_) {
LOG(WARNING) << "Invalidate CDN tmp_key";
auth_data_.drop_main_auth_key();
on_auth_key_updated();
on_session_failed(status.clone());
} else if (need_destroy_auth_key_) {
LOG(WARNING) << "Session connection was closed, because main auth_key has been successfully destroyed";
auth_data_.drop_main_auth_key();
on_auth_key_updated();
} else {
// log out if has error and or 1 minute is passed from start, or 1 minute has passed since auth_key creation
if (!use_pfs_) {
LOG(WARNING) << "Use PFS to check main key";
auth_data_.set_use_pfs(true);
} else if (need_check_main_key_) {
LOG(WARNING) << "Invalidate main key";
auth_data_.drop_main_auth_key();
on_auth_key_updated();
G()->log_out("Main PFS authorization key is invalid");
} else {
LOG(WARNING) << "Session connection was closed: " << status << ' ' << current_info_->connection_->get_name();
}
yield();
}
} else {
if (status.is_error()) {
LOG(WARNING) << "Session connection with " << sent_queries_.size() << " pending requests was closed: " << status
<< ' ' << current_info_->connection_->get_name();
} else {
LOG(INFO) << "Session connection with " << sent_queries_.size() << " pending requests was closed: " << status
<< ' ' << current_info_->connection_->get_name();
}
}
// resend all queries without ack
for (auto it = sent_queries_.begin(); it != sent_queries_.end();) {
if (!it->second.is_acknowledged_ && it->second.connection_id_ == current_info_->connection_id_) {
// container vector leak otherwise
cleanup_container(it->first, &it->second);
// mark query as unknown
if (status.is_error() && status.code() == 500) {
cleanup_container(it->first, &it->second);
mark_as_known(it->first, &it->second);
auto &query = it->second.net_query_;
VLOG(net_query) << "Resend query (on_disconnected, no ack) " << query;
query->set_message_id(0);
query->set_error(Status::Error(500, PSLICE() << "Session failed: " << status.message()),
current_info_->connection_->get_name().str());
return_query(std::move(query));
it = sent_queries_.erase(it);
} else {
mark_as_unknown(it->first, &it->second);
++it;
}
} else {
++it;
}
}
current_info_->connection_.reset();
current_info_->state_ = ConnectionInfo::State::Empty;
}
void Session::on_new_session_created(uint64 unique_id, mtproto::MessageId first_message_id) {
LOG(INFO) << "New session " << unique_id << " created with first " << first_message_id;
if (!use_pfs_ && !auth_data_.use_pfs()) {
last_success_timestamp_ = Time::now();
}
if (is_main_) {
LOG(DEBUG) << "Sending updatesTooLong to force getDifference";
BufferSlice packet(4);
as<int32>(packet.as_mutable_slice().begin()) = telegram_api::updatesTooLong::ID;
last_activity_timestamp_ = Time::now();
callback_->on_update(std::move(packet), auth_data_.get_auth_key().id());
}
auto first_query_it = sent_queries_.find(first_message_id);
if (first_query_it != sent_queries_.end()) {
first_message_id = first_query_it->second.container_message_id_;
LOG(INFO) << "Update first message to container's " << first_message_id;
} else {
LOG(INFO) << "Failed to find sent " << first_message_id << " from the new session";
}
for (auto it = sent_queries_.begin(); it != sent_queries_.end();) {
Query *query_ptr = &it->second;
if (query_ptr->container_message_id_ < first_message_id) {
// container vector leak otherwise
cleanup_container(it->first, query_ptr);
mark_as_known(it->first, query_ptr);
resend_query(std::move(query_ptr->net_query_));
it = sent_queries_.erase(it);
} else {
++it;
}
}
}
void Session::on_session_failed(Status status) {
if (status.is_error()) {
LOG(WARNING) << "Session failed: " << status;
} else {
LOG(INFO) << "Session will be closed soon";
}
// this connection will be closed soon
close_flag_ = true;
callback_->on_failed();
}
void Session::on_container_sent(mtproto::MessageId container_message_id, vector<mtproto::MessageId> message_ids) {
CHECK(container_message_id != mtproto::MessageId());
td::remove_if(message_ids, [&](mtproto::MessageId message_id) {
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
return true; // remove
}
it->second.container_message_id_ = container_message_id;
return false;
});
if (message_ids.empty()) {
return;
}
auto size = message_ids.size();
sent_containers_.emplace(container_message_id, ContainerInfo{size, std::move(message_ids)});
}
void Session::on_message_ack(mtproto::MessageId message_id) {
on_message_ack_impl(message_id, 1);
}
void Session::on_message_ack_impl(mtproto::MessageId container_message_id, int32 type) {
auto cit = sent_containers_.find(container_message_id);
if (cit != sent_containers_.end()) {
auto container_info = std::move(cit->second);
sent_containers_.erase(cit);
for (auto message_id : container_info.message_ids) {
on_message_ack_impl_inner(message_id, type, true);
}
return;
}
on_message_ack_impl_inner(container_message_id, type, false);
}
void Session::on_message_ack_impl_inner(mtproto::MessageId message_id, int32 type, bool in_container) {
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
return;
}
VLOG(net_query) << "Ack " << it->second.net_query_;
it->second.is_acknowledged_ = true;
{
auto lock = it->second.net_query_->lock();
it->second.net_query_->get_data_unsafe().ack_state_ |= type;
}
it->second.net_query_->quick_ack_promise_.set_value(Unit());
if (!in_container) {
cleanup_container(message_id, &it->second);
}
mark_as_known(it->first, &it->second);
}
void Session::dec_container(mtproto::MessageId container_message_id, Query *query) {
if (query->container_message_id_ == container_message_id) {
// message was sent without any container
return;
}
auto it = sent_containers_.find(query->container_message_id_);
if (it == sent_containers_.end()) {
return;
}
CHECK(it->second.ref_cnt > 0);
it->second.ref_cnt--;
if (it->second.ref_cnt == 0) {
sent_containers_.erase(it);
}
}
void Session::cleanup_container(mtproto::MessageId container_message_id, Query *query) {
if (query->container_message_id_ == container_message_id) {
// message was sent without any container
return;
}
// we can forget container now, since we have an answer for its part.
// TODO: we can do it only for one element per container
sent_containers_.erase(query->container_message_id_);
}
void Session::mark_as_known(mtproto::MessageId message_id, Query *query) {
{
auto lock = query->net_query_->lock();
query->net_query_->get_data_unsafe().unknown_state_ = false;
}
if (!query->is_unknown_) {
return;
}
VLOG(net_query) << "Mark as known " << query->net_query_;
query->is_unknown_ = false;
unknown_queries_.erase(message_id);
if (unknown_queries_.empty()) {
flush_pending_invoke_after_queries();
}
}
void Session::mark_as_unknown(mtproto::MessageId message_id, Query *query) {
{
auto lock = query->net_query_->lock();
query->net_query_->get_data_unsafe().unknown_state_ = true;
}
if (query->is_unknown_) {
return;
}
VLOG(net_query) << "Mark as unknown " << query->net_query_;
query->is_unknown_ = true;
CHECK(message_id != mtproto::MessageId());
unknown_queries_.insert(message_id);
}
Status Session::on_update(BufferSlice packet) {
if (is_cdn_) {
return Status::Error("Receive an update from a CDN connection");
}
if (!use_pfs_ && !auth_data_.use_pfs()) {
last_success_timestamp_ = Time::now();
}
last_activity_timestamp_ = Time::now();
callback_->on_update(std::move(packet), auth_data_.get_auth_key().id());
return Status::OK();
}
Status Session::on_message_result_ok(mtproto::MessageId message_id, BufferSlice packet, size_t original_size) {
last_success_timestamp_ = Time::now();
TlParser parser(packet.as_slice());
int32 response_tl_id = parser.fetch_int();
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
LOG(DEBUG) << "Drop result to " << message_id << tag("original_size", original_size)
<< tag("response_tl", format::as_hex(response_tl_id));
if (original_size > 16 * 1024) {
dropped_size_ += original_size;
if (dropped_size_ > (256 * 1024)) {
auto dropped_size = dropped_size_;
dropped_size_ = 0;
return Status::Error(
2, PSLICE() << "Too many dropped packets " << tag("total_size", format::as_size(dropped_size)));
}
}
return Status::OK();
}
auth_data_.on_api_response();
Query *query_ptr = &it->second;
VLOG(net_query) << "Return query result " << query_ptr->net_query_;
if (!parser.get_error()) {
// Steal authorization information.
// It is a dirty hack, yep.
if (response_tl_id == telegram_api::auth_authorization::ID ||
response_tl_id == telegram_api::auth_loginTokenSuccess::ID ||
response_tl_id == telegram_api::auth_sentCodeSuccess::ID) {
if (query_ptr->net_query_->tl_constructor() != telegram_api::auth_importAuthorization::ID) {
G()->net_query_dispatcher().set_main_dc_id(raw_dc_id_);
}
auth_data_.set_auth_flag(true);
shared_auth_data_->set_auth_key(auth_data_.get_main_auth_key());
}
}
cleanup_container(message_id, query_ptr);
mark_as_known(message_id, query_ptr);
query_ptr->net_query_->on_net_read(original_size);
query_ptr->net_query_->set_ok(std::move(packet));
query_ptr->net_query_->set_message_id(0);
return_query(std::move(query_ptr->net_query_));
sent_queries_.erase(it);
return Status::OK();
}
void Session::on_message_result_error(mtproto::MessageId message_id, int error_code, string message) {
if (!check_utf8(message)) {
LOG(ERROR) << "Receive invalid error message \"" << message << '"';
message = "INVALID_UTF8_ERROR_MESSAGE";
}
if (error_code <= -10000 || error_code >= 10000 || error_code == 0) {
LOG(ERROR) << "Receive invalid error code " << error_code << " with message \"" << message << '"';
error_code = 500;
}
// UNAUTHORIZED
if (error_code == 401 && message != "SESSION_PASSWORD_NEEDED") {
if (auth_data_.use_pfs() && message == CSlice("AUTH_KEY_PERM_EMPTY")) {
LOG(INFO) << "Receive AUTH_KEY_PERM_EMPTY in session " << auth_data_.get_session_id() << " for auth key "
<< auth_data_.get_tmp_auth_key().id();
// temporary key can be dropped any time
auth_data_.drop_tmp_auth_key();
on_tmp_auth_key_updated();
error_code = 500;
} else {
if (auth_data_.use_pfs() && !is_main_) {
// temporary key can be dropped any time
auth_data_.drop_tmp_auth_key();
on_tmp_auth_key_updated();
error_code = 500;
}
bool can_drop_main_auth_key_without_logging_out = is_cdn_;
if (!is_main_ && G()->net_query_dispatcher().get_main_dc_id().get_raw_id() != raw_dc_id_) {
can_drop_main_auth_key_without_logging_out = true;
}
LOG(INFO) << "Receive 401, " << message << " in session " << auth_data_.get_session_id() << " for auth key "
<< auth_data_.get_auth_key().id() << ", PFS = " << auth_data_.use_pfs() << ", is_main = " << is_main_
<< ", can_drop_main_auth_key_without_logging_out = " << can_drop_main_auth_key_without_logging_out;
if (can_drop_main_auth_key_without_logging_out) {
auth_data_.drop_main_auth_key();
on_auth_key_updated();
error_code = 500;
} else {
auth_data_.set_auth_flag(false);
G()->log_out(message);
shared_auth_data_->set_auth_key(auth_data_.get_main_auth_key());
on_session_failed(Status::OK());
}
}
}
if (error_code == 400 && (message == "CONNECTION_NOT_INITED" || message == "CONNECTION_LAYER_INVALID")) {
LOG(WARNING) << "Receive " << message;
auth_data_.on_connection_not_inited();
error_code = 500;
}
if (message_id == mtproto::MessageId()) {
LOG(ERROR) << "Receive an error without message_id";
return;
}
if (error_code < 0) {
LOG(WARNING) << "Receive MTProto error " << error_code << " : " << message << " in session "
<< auth_data_.get_session_id() << " for auth key " << auth_data_.get_auth_key().id() << " with "
<< sent_queries_.size() << " pending requests";
}
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
current_info_->connection_->force_ack();
return;
}
Query *query_ptr = &it->second;
VLOG(net_query) << "Return query error " << query_ptr->net_query_;
cleanup_container(message_id, query_ptr);
mark_as_known(message_id, query_ptr);
query_ptr->net_query_->set_error(Status::Error(error_code, message), current_info_->connection_->get_name().str());
query_ptr->net_query_->set_message_id(0);
return_query(std::move(query_ptr->net_query_));
sent_queries_.erase(it);
}
void Session::on_message_failed_inner(mtproto::MessageId message_id, bool in_container) {
LOG(INFO) << "Message inner failed for " << message_id;
auto it = sent_queries_.find(message_id);
if (it == sent_queries_.end()) {
return;
}
Query *query_ptr = &it->second;
if (!in_container) {
cleanup_container(message_id, query_ptr);
}
mark_as_known(message_id, query_ptr);
query_ptr->net_query_->debug_send_failed();
resend_query(std::move(query_ptr->net_query_));
sent_queries_.erase(it);
}
void Session::on_message_failed(mtproto::MessageId message_id, Status status) {
LOG(INFO) << "Failed to send " << message_id << ": " << status;
status.ignore();
auto cit = sent_containers_.find(message_id);
if (cit != sent_containers_.end()) {
auto container_info = std::move(cit->second);
sent_containers_.erase(cit);
for (auto contained_message_id : container_info.message_ids) {
on_message_failed_inner(contained_message_id, true);
}
return;
}
on_message_failed_inner(message_id, false);
}
void Session::on_message_info(mtproto::MessageId message_id, int32 state, mtproto::MessageId answer_message_id,
int32 answer_size, int32 source) {
auto it = sent_queries_.find(message_id);
if (it != sent_queries_.end()) {
if (it->second.net_query_->update_is_ready()) {
dec_container(it->first, &it->second);
mark_as_known(it->first, &it->second);
auto query = std::move(it->second.net_query_);
query->set_message_id(0);
sent_queries_.erase(it);
return_query(std::move(query));
return;
}
}
LOG(INFO) << "Receive info about " << message_id << " with state = " << state << " and answer " << answer_message_id
<< " from " << source;
if (message_id != mtproto::MessageId()) {
if (it == sent_queries_.end()) {
return;
}
switch (state & 7) {
case 1:
case 2:
case 3:
return on_message_failed(message_id,
Status::Error("Message wasn't received by the server and must be re-sent"));
case 0:
if (answer_message_id == mtproto::MessageId()) {
LOG(ERROR) << "Unexpected message_info.state == 0 for " << message_id << ": " << tag("state", state)
<< tag("answer", answer_message_id);
return on_message_failed(message_id, Status::Error("Unexpected message_info.state == 0"));
}
// fallthrough
case 4:
CHECK(0 <= source && source <= 3);
on_message_ack_impl(message_id, (answer_message_id != mtproto::MessageId() ? 2 : 0) |
(((state | source) & ((1 << 28) - 1)) << 2));
break;
default:
LOG(ERROR) << "Invalid message info " << tag("state", state);
}
}
// ok, we are waiting for result of message_id. let's ask to resend it
if (answer_message_id != mtproto::MessageId()) {
if (it != sent_queries_.end()) {
VLOG_IF(net_query, message_id != mtproto::MessageId())
<< "Resend answer " << answer_message_id << ": " << tag("answer_size", answer_size) << it->second.net_query_;
it->second.net_query_->debug(PSTRING() << get_name() << ": resend answer");
}
current_info_->connection_->resend_answer(answer_message_id);
}
}
Status Session::on_destroy_auth_key() {
auth_data_.drop_main_auth_key();
on_auth_key_updated();
return Status::Error("Close because of on_destroy_auth_key");
}
bool Session::has_queries() const {
return !pending_invoke_after_queries_.empty() || !pending_queries_.empty() || !sent_queries_.empty();
}
void Session::resend_query(NetQueryPtr query) {
VLOG(net_query) << "Resend " << query;
query->set_message_id(0);
if (UniqueId::extract_type(query->id()) == UniqueId::BindKey) {
query->set_error_resend();
return_query(std::move(query));
} else {
add_query(std::move(query));
}
}
void Session::add_query(NetQueryPtr &&net_query) {
CHECK(UniqueId::extract_type(net_query->id()) != UniqueId::BindKey);
net_query->debug(PSTRING() << get_name() << ": pending");
pending_queries_.push(std::move(net_query));
}
void Session::connection_send_query(ConnectionInfo *info, NetQueryPtr &&net_query, mtproto::MessageId message_id) {
CHECK(info->state_ == ConnectionInfo::State::Ready);
current_info_ = info;
if (net_query->update_is_ready()) {
return return_query(std::move(net_query));
}
Span<NetQueryRef> invoke_after = net_query->invoke_after();
vector<mtproto::MessageId> invoke_after_message_ids;
for (auto &ref : invoke_after) {
auto invoke_after_message_id = mtproto::MessageId(ref->message_id());
if (ref->session_id() != auth_data_.get_session_id() || invoke_after_message_id == mtproto::MessageId()) {
net_query->set_error_resend_invoke_after();
return return_query(std::move(net_query));
}
invoke_after_message_ids.push_back(invoke_after_message_id);
}
if (!invoke_after.empty()) {
if (!unknown_queries_.empty()) {
net_query->debug(PSTRING() << get_name() << ": wait unknown query to invoke after it");
pending_invoke_after_queries_.push_back(std::move(net_query));
return;
}
}
auto now = Time::now();
bool immediately_fail_query = false;
if (!immediately_fail_query) {
net_query->debug(PSTRING() << get_name() << ": send to an MTProto connection");
auto r_message_id = info->connection_->send_query(
net_query->query().clone(), net_query->gzip_flag() == NetQuery::GzipFlag::On, message_id,
invoke_after_message_ids, static_cast<bool>(net_query->quick_ack_promise_));
net_query->on_net_write(net_query->query().size());
if (r_message_id.is_error()) {
LOG(FATAL) << "Failed to send query: " << r_message_id.error();
}
message_id = r_message_id.ok();
} else {
if (message_id == mtproto::MessageId()) {
message_id = auth_data_.next_message_id(now);
}
}
net_query->set_message_id(message_id.get());
VLOG(net_query) << "Send query to connection " << net_query << tag("invoke_after", invoke_after_message_ids);
{
auto lock = net_query->lock();
net_query->get_data_unsafe().unknown_state_ = false;
net_query->get_data_unsafe().ack_state_ = 0;
}
if (!net_query->cancel_slot_.empty()) {
LOG(DEBUG) << "Set event for net_query cancellation for " << message_id;
net_query->cancel_slot_.set_event(EventCreator::raw(actor_id(), message_id.get()));
}
auto status =
sent_queries_.emplace(message_id, Query{message_id, std::move(net_query), main_connection_.connection_id_, now});
LOG_CHECK(status.second) << message_id;
sent_queries_list_.put(status.first->second.get_list_node());
if (!status.second) {
LOG(FATAL) << "Duplicate " << message_id;
}
if (immediately_fail_query) {
on_message_result_error(message_id, 401, "TEST_ERROR");
}
}
void Session::connection_open(ConnectionInfo *info, double now, bool ask_info) {
CHECK(info->state_ == ConnectionInfo::State::Empty);
if (!network_flag_) {
return;
}
if (!auth_data_.has_auth_key(now)) {
return;
}
info->ask_info_ = ask_info;
info->state_ = ConnectionInfo::State::Connecting;
info->cancellation_token_source_ = CancellationTokenSource{};
// NB: rely on constant location of info
auto promise = PromiseCreator::cancellable_lambda(
info->cancellation_token_source_.get_cancellation_token(),
[actor_id = actor_id(this), info](Result<unique_ptr<mtproto::RawConnection>> res) {
send_closure(actor_id, &Session::connection_open_finish, info, std::move(res));
});
if (cached_connection_) {
VLOG(dc) << "Reuse cached connection";
promise.set_value(std::move(cached_connection_));
} else {
VLOG(dc) << "Request new connection";
unique_ptr<mtproto::AuthData> auth_data;
if (auth_data_.use_pfs() && auth_data_.has_auth_key(now)) {
// auth_data = make_unique<mtproto::AuthData>(auth_data_);
}
callback_->request_raw_connection(std::move(auth_data), std::move(promise));
}
info->wakeup_at_ = now + 1000;
}
void Session::connection_add(unique_ptr<mtproto::RawConnection> raw_connection) {
VLOG(dc) << "Cache connection " << raw_connection.get();
cached_connection_ = std::move(raw_connection);
cached_connection_timestamp_ = Time::now();
}
void Session::connection_check_mode(ConnectionInfo *info) {
if (close_flag_ || info->state_ != ConnectionInfo::State::Ready) {
return;
}
if (info->mode_ != mode_) {
LOG(WARNING) << "Close connection because of outdated mode_";
connection_close(info);
}
}
void Session::connection_open_finish(ConnectionInfo *info,
Result<unique_ptr<mtproto::RawConnection>> r_raw_connection) {
if (close_flag_ || info->state_ != ConnectionInfo::State::Connecting) {
VLOG(dc) << "Ignore raw connection while closing";
return;
}
current_info_ = info;
if (r_raw_connection.is_error()) {
LOG(WARNING) << "Failed to open socket: " << r_raw_connection.error();
info->state_ = ConnectionInfo::State::Empty;
yield();
return;
}
auto raw_connection = r_raw_connection.move_as_ok();
VLOG(dc) << "Receive raw connection " << raw_connection.get();
if (raw_connection->extra().extra != network_generation_) {
LOG(WARNING) << "Receive RawConnection with old network_generation";
info->state_ = ConnectionInfo::State::Empty;
yield();
return;
}
Mode expected_mode =
raw_connection->get_transport_type().type == mtproto::TransportType::Http ? Mode::Http : Mode::Tcp;
if (mode_ != expected_mode) {
VLOG(dc) << "Change mode " << mode_ << "--->" << expected_mode;
mode_ = expected_mode;
if (info->connection_id_ == 1 && mode_ != Mode::Http) {
LOG(WARNING) << "Receive TCP connection for long poll connection";
connection_add(std::move(raw_connection));
info->state_ = ConnectionInfo::State::Empty;
yield();
return;
}
}
mtproto::SessionConnection::Mode mode;
Slice mode_name;
if (mode_ == Mode::Tcp) {
mode = mtproto::SessionConnection::Mode::Tcp;
mode_name = Slice("TCP");
} else {
if (info->connection_id_ == 0) {
mode = mtproto::SessionConnection::Mode::Http;
mode_name = Slice("HTTP");
} else {
mode = mtproto::SessionConnection::Mode::HttpLongPoll;
mode_name = Slice("LongPoll");
}
}
auto name = PSTRING() << get_name() << "::Connect::" << mode_name << "::" << raw_connection->extra().debug_str;
LOG(INFO) << "Finished to open connection " << name;
info->connection_ = make_unique<mtproto::SessionConnection>(mode, std::move(raw_connection), &auth_data_);
if (can_destroy_auth_key()) {
info->connection_->destroy_key();
}
info->connection_->set_online(connection_online_flag_, is_primary_);
info->connection_->set_name(name);
Scheduler::subscribe(info->connection_->get_poll_info().extract_pollable_fd(this));
info->mode_ = mode_;
info->state_ = ConnectionInfo::State::Ready;
info->created_at_ = Time::now();
info->wakeup_at_ = info->created_at_ + 10;
if (unknown_queries_.size() > MAX_INFLIGHT_QUERIES) {
LOG(ERROR) << "With current limits `Too many queries with unknown state` error must be impossible";
on_session_failed(Status::Error("Too many queries with unknown state"));
return;
}
if (info->ask_info_) {
for (auto &message_id : unknown_queries_) {
info->connection_->get_state_info(message_id);
}
for (auto &message_id : to_cancel_message_ids_) {
info->connection_->cancel_answer(message_id);
}
to_cancel_message_ids_.clear();
}
yield();
}
void Session::connection_flush(ConnectionInfo *info) {
CHECK(info->state_ == ConnectionInfo::State::Ready);
current_info_ = info;
info->wakeup_at_ = info->connection_->flush(static_cast<mtproto::SessionConnection::Callback *>(this));
}
void Session::connection_close(ConnectionInfo *info) {
current_info_ = info;
if (info->state_ != ConnectionInfo::State::Ready) {
return;
}
info->connection_->force_close(static_cast<mtproto::SessionConnection::Callback *>(this));
CHECK(info->state_ == ConnectionInfo::State::Empty);
}
bool Session::need_send_check_main_key() const {
return need_check_main_key_ && auth_data_.get_main_auth_key().id() != being_checked_main_auth_key_id_;
}
bool Session::connection_send_check_main_key(ConnectionInfo *info) {
if (!need_check_main_key_) {
return false;
}
uint64 key_id = auth_data_.get_main_auth_key().id();
if (key_id == being_checked_main_auth_key_id_) {
return false;
}
CHECK(info->state_ != ConnectionInfo::State::Empty);
LOG(INFO) << "Check main key";
being_checked_main_auth_key_id_ = key_id;
last_check_query_id_ = UniqueId::next(UniqueId::BindKey);
NetQueryPtr query = G()->net_query_creator().create(last_check_query_id_, nullptr, telegram_api::help_getNearestDc(),
{}, DcId::main(), NetQuery::Type::Common, NetQuery::AuthFlag::On);
query->dispatch_ttl_ = 0;
query->set_callback(actor_shared(this));
connection_send_query(info, std::move(query));
return true;
}
bool Session::need_send_bind_key() const {
return auth_data_.use_pfs() && !auth_data_.get_bind_flag() &&
auth_data_.get_tmp_auth_key().id() != being_binded_tmp_auth_key_id_;
}
bool Session::need_send_query() const {
return !close_flag_ && !need_check_main_key_ && (!auth_data_.use_pfs() || auth_data_.get_bind_flag()) &&
!pending_queries_.empty() && !can_destroy_auth_key();
}
bool Session::connection_send_bind_key(ConnectionInfo *info) {
CHECK(info->state_ != ConnectionInfo::State::Empty);
uint64 key_id = auth_data_.get_tmp_auth_key().id();
if (key_id == being_binded_tmp_auth_key_id_) {
return false;
}
being_binded_tmp_auth_key_id_ = key_id;
last_bind_query_id_ = UniqueId::next(UniqueId::BindKey);
int64 perm_auth_key_id = auth_data_.get_main_auth_key().id();
int64 nonce = Random::secure_int64();
auto expires_at = static_cast<int32>(auth_data_.get_server_time(auth_data_.get_tmp_auth_key().expires_at()));
mtproto::MessageId message_id;
BufferSlice encrypted;
std::tie(message_id, encrypted) = info->connection_->encrypted_bind(perm_auth_key_id, nonce, expires_at);
LOG(INFO) << "Bind key: " << tag("tmp", key_id) << tag("perm", static_cast<uint64>(perm_auth_key_id));
NetQueryPtr query = G()->net_query_creator().create(
last_bind_query_id_, nullptr,
telegram_api::auth_bindTempAuthKey(perm_auth_key_id, nonce, expires_at, std::move(encrypted)), {}, DcId::main(),
NetQuery::Type::Common, NetQuery::AuthFlag::On);
query->dispatch_ttl_ = 0;
query->set_callback(actor_shared(this));
connection_send_query(info, std::move(query), message_id);
return true;
}
void Session::on_handshake_ready(Result<unique_ptr<mtproto::AuthKeyHandshake>> r_handshake) {
auto handshake_id = narrow_cast<HandshakeId>(get_link_token() - 1);
bool is_main = handshake_id == MainAuthKeyHandshake;
auto &info = handshake_info_[handshake_id];
info.flag_ = false;
info.actor_.reset();
if (r_handshake.is_error()) {
LOG(ERROR) << "Handshake failed: " << r_handshake.move_as_error();
} else {
auto handshake = r_handshake.move_as_ok();
if (!handshake->is_ready_for_finish()) {
LOG(INFO) << "Handshake is not yet ready";
info.handshake_ = std::move(handshake);
} else {
if (is_main) {
auth_data_.set_main_auth_key(handshake->release_auth_key());
on_auth_key_updated();
} else {
auth_data_.set_tmp_auth_key(handshake->release_auth_key());
if (is_main_) {
registered_temp_auth_key_ = TempAuthKeyWatchdog::register_auth_key_id(auth_data_.get_tmp_auth_key().id());
}
on_tmp_auth_key_updated();
}
LOG(WARNING) << "Update auth key in session_id " << auth_data_.get_session_id() << " to "
<< auth_data_.get_auth_key().id();
connection_close(&main_connection_);
connection_close(&long_poll_connection_);
// Salt of temporary key is different salt. Do not rewrite it
if (auth_data_.use_pfs() ^ is_main) {
auth_data_.set_server_salt(handshake->get_server_salt(), Time::now());
on_server_salt_updated();
}
if (auth_data_.update_server_time_difference(handshake->get_server_time_diff())) {
on_server_time_difference_updated(true);
}
}
}
loop();
}
void Session::create_gen_auth_key_actor(HandshakeId handshake_id) {
auto &info = handshake_info_[handshake_id];
if (info.flag_) {
return;
}
LOG(INFO) << "Create GenAuthKeyActor " << handshake_id;
info.flag_ = true;
bool is_main = handshake_id == MainAuthKeyHandshake;
if (!info.handshake_) {
auto key_validity_time = is_main && !is_cdn_ ? 0 : Random::fast(23 * 60 * 60, 24 * 60 * 60);
info.handshake_ = make_unique<mtproto::AuthKeyHandshake>(dc_id_, key_validity_time);
}
class AuthKeyHandshakeContext final : public mtproto::AuthKeyHandshakeContext {
public:
AuthKeyHandshakeContext(mtproto::DhCallback *dh_callback,
std::shared_ptr<mtproto::PublicRsaKeyInterface> public_rsa_key)
: dh_callback_(dh_callback), public_rsa_key_(std::move(public_rsa_key)) {
}
mtproto::DhCallback *get_dh_callback() final {
return dh_callback_;
}
mtproto::PublicRsaKeyInterface *get_public_rsa_key_interface() final {
return public_rsa_key_.get();
}
private:
mtproto::DhCallback *dh_callback_;
std::shared_ptr<mtproto::PublicRsaKeyInterface> public_rsa_key_;
};
info.actor_ = create_actor<detail::GenAuthKeyActor>(
PSLICE() << get_name() << "::GenAuthKey", get_name(), std::move(info.handshake_),
td::make_unique<AuthKeyHandshakeContext>(DhCache::instance(), shared_auth_data_->public_rsa_key()),
PromiseCreator::lambda(
[actor_id = actor_id(this), guard = callback_](Result<unique_ptr<mtproto::RawConnection>> r_connection) {
if (r_connection.is_error()) {
if (r_connection.error().code() != 1) {
LOG(WARNING) << "Failed to open connection: " << r_connection.error();
}
return;
}
send_closure(actor_id, &Session::connection_add, r_connection.move_as_ok());
}),
PromiseCreator::lambda([self = actor_shared(this, handshake_id + 1),
handshake_perf = PerfWarningTimer("handshake", 1000.1),
guard = callback_](Result<unique_ptr<mtproto::AuthKeyHandshake>> handshake) mutable {
// later is just to avoid lost hangup
send_closure_later(std::move(self), &Session::on_handshake_ready, std::move(handshake));
}),
callback_);
}
void Session::auth_loop(double now) {
if (can_destroy_auth_key()) {
return;
}
if (auth_data_.need_main_auth_key()) {
create_gen_auth_key_actor(MainAuthKeyHandshake);
}
if (auth_data_.need_tmp_auth_key(now, persist_tmp_auth_key_ ? 2 * 60 : 60 * 60)) {
create_gen_auth_key_actor(TmpAuthKeyHandshake);
}
}
void Session::timeout_expired() {
send_closure_later(actor_id(this), &Session::loop);
}
void Session::loop() {
if (!was_on_network_) {
return;
}
auto now = Time::now();
if (cached_connection_timestamp_ < now - 10) {
cached_connection_.reset();
}
if (!is_main_ && !has_queries() && !need_destroy_auth_key_ && last_activity_timestamp_ < now - ACTIVITY_TIMEOUT) {
on_session_failed(Status::OK());
}
auth_loop(now);
connection_online_update(now, false);
double wakeup_at = 0;
main_connection_.wakeup_at_ = 0;
long_poll_connection_.wakeup_at_ = 0;
// NB: order is crucial. First long_poll_connection, then main_connection
// Otherwise, queries could be sent with big delay
connection_check_mode(&main_connection_);
connection_check_mode(&long_poll_connection_);
if (mode_ == Mode::Http) {
if (long_poll_connection_.state_ == ConnectionInfo::State::Ready) {
connection_flush(&long_poll_connection_);
}
if (!close_flag_ && long_poll_connection_.state_ == ConnectionInfo::State::Empty) {
connection_open(&long_poll_connection_, now);
}
relax_timeout_at(&wakeup_at, long_poll_connection_.wakeup_at_);
}
if (main_connection_.state_ == ConnectionInfo::State::Ready) {
// do not send queries before we have key and e.t.c
// do not send queries before tmp_key is bound
bool need_flush = true;
while (main_connection_.state_ == ConnectionInfo::State::Ready) {
if (auth_data_.is_ready(now)) {
if (need_send_query()) {
while (!pending_queries_.empty() && sent_queries_.size() < MAX_INFLIGHT_QUERIES) {
auto query = pending_queries_.pop();
connection_send_query(&main_connection_, std::move(query));
need_flush = true;
}
}
if (need_send_bind_key()) {
// send auth.bindTempAuthKey
connection_send_bind_key(&main_connection_);
need_flush = true;
}
if (need_send_check_main_key()) {
connection_send_check_main_key(&main_connection_);
need_flush = true;
}
}
if (need_flush) {
connection_flush(&main_connection_);
need_flush = false;
} else {
break;
}
}
}
if (!close_flag_ && main_connection_.state_ == ConnectionInfo::State::Empty) {
connection_open(&main_connection_, now, true /*send ask_info*/);
}
connection_online_update(now, false); // has_queries() could have been changed
relax_timeout_at(&wakeup_at, main_connection_.wakeup_at_);
if (wakeup_at != 0) {
set_timeout_at(wakeup_at);
}
}
} // namespace td
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