91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/mtproto/AuthKey.h"
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#include "td/mtproto/NoCryptoStorer.h"
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#include "td/mtproto/PacketInfo.h"
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#include "td/mtproto/PacketStorer.h"
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#include "td/mtproto/RawConnection.h"
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#include "td/mtproto/utils.h"
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#include "td/mtproto/mtproto_api.h"
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#include "td/utils/buffer.h"
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#include "td/utils/port/detail/PollableFd.h"
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#include "td/utils/Random.h"
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#include "td/utils/Status.h"
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#include "td/utils/Time.h"
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#include "td/utils/UInt.h"
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namespace td {
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namespace mtproto {
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class PingConnection : private RawConnection::Callback {
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public:
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PingConnection(unique_ptr<RawConnection> raw_connection, size_t ping_count)
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: raw_connection_(std::move(raw_connection)), ping_count_(ping_count) {
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}
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PollableFdInfo &get_poll_info() {
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return raw_connection_->get_poll_info();
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}
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unique_ptr<RawConnection> move_as_raw_connection() {
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return std::move(raw_connection_);
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}
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void close() {
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raw_connection_->close();
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}
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Status flush() {
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if (!was_ping_) {
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UInt128 nonce;
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Random::secure_bytes(nonce.raw, sizeof(nonce));
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raw_connection_->send_no_crypto(PacketStorer<NoCryptoImpl>(1, create_storer(mtproto_api::req_pq_multi(nonce))));
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was_ping_ = true;
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if (ping_count_ == 1) {
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start_time_ = Time::now();
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}
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}
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return raw_connection_->flush(AuthKey(), *this);
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}
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bool was_pong() const {
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return finish_time_ > 0;
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}
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double rtt() const {
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return finish_time_ - start_time_;
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}
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Status on_raw_packet(const PacketInfo &packet_info, BufferSlice packet) override {
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if (packet.size() < 12) {
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return Status::Error("Result is too small");
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}
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packet.confirm_read(12);
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// TODO: fetch_result
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if (--ping_count_ > 0) {
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was_ping_ = false;
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return flush();
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} else {
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finish_time_ = Time::now();
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return Status::OK();
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}
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}
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private:
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unique_ptr<RawConnection> raw_connection_;
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size_t ping_count_ = 1;
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double start_time_ = 0.0;
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double finish_time_ = 0.0;
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bool was_ping_ = false;
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};
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} // namespace mtproto
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} // namespace td
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