283 lines
10 KiB
C++
283 lines
10 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
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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/MessageId.h"
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#include "td/mtproto/MtprotoQuery.h"
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#include "td/mtproto/PacketInfo.h"
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#include "td/mtproto/RawConnection.h"
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#include "td/utils/buffer.h"
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#include "td/utils/common.h"
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#include "td/utils/FlatHashMap.h"
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#include "td/utils/logging.h"
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#include "td/utils/Named.h"
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#include "td/utils/port/detail/PollableFd.h"
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#include "td/utils/ScopeGuard.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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#include "td/utils/StorerBase.h"
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#include "td/utils/StringBuilder.h"
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#include "td/utils/tl_parsers.h"
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#include <utility>
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namespace td {
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extern int VERBOSITY_NAME(mtproto);
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namespace mtproto_api {
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class new_session_created;
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class bad_msg_notification;
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class bad_server_salt;
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class msgs_ack;
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class gzip_packed;
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class pong;
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class future_salts;
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class msgs_state_info;
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class msgs_all_info;
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class msg_detailed_info;
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class msg_new_detailed_info;
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class DestroyAuthKeyRes;
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class destroy_auth_key_ok;
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class destroy_auth_key_fail;
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class destroy_auth_key_none;
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} // namespace mtproto_api
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namespace mtproto {
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class AuthData;
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class SessionConnection final
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: public Named
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, private RawConnection::Callback {
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public:
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enum class Mode : int32 { Tcp, Http, HttpLongPoll };
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SessionConnection(Mode mode, unique_ptr<RawConnection> raw_connection, AuthData *auth_data);
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SessionConnection(const SessionConnection &) = delete;
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SessionConnection &operator=(const SessionConnection &) = delete;
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SessionConnection(SessionConnection &&) = delete;
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SessionConnection &operator=(SessionConnection &&) = delete;
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~SessionConnection() = default;
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PollableFdInfo &get_poll_info();
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unique_ptr<RawConnection> move_as_raw_connection();
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// Interface
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Result<MessageId> TD_WARN_UNUSED_RESULT send_query(BufferSlice buffer, bool gzip_flag, MessageId message_id = {},
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vector<MessageId> invoke_after_message_ids = {},
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bool use_quick_ack = false);
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std::pair<MessageId, BufferSlice> encrypted_bind(int64 perm_key, int64 nonce, int32 expires_at);
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void get_state_info(MessageId message_id);
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void resend_answer(MessageId message_id);
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void cancel_answer(MessageId message_id);
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void destroy_key();
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void set_online(bool online_flag, bool is_main);
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void force_ack();
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class Callback {
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public:
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Callback() = default;
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Callback(const Callback &) = delete;
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Callback &operator=(const Callback &) = delete;
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virtual ~Callback() = default;
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virtual void on_connected() = 0;
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virtual void on_closed(Status status) = 0;
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virtual void on_auth_key_updated() = 0;
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virtual void on_tmp_auth_key_updated() = 0;
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virtual void on_server_salt_updated() = 0;
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virtual void on_server_time_difference_updated(bool force) = 0;
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virtual void on_new_session_created(uint64 unique_id, MessageId first_message_id) = 0;
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virtual void on_session_failed(Status status) = 0;
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virtual void on_container_sent(MessageId container_message_id, vector<MessageId> message_ids) = 0;
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virtual Status on_pong() = 0;
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virtual Status on_update(BufferSlice packet) = 0;
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virtual void on_message_ack(MessageId message_id) = 0;
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virtual Status on_message_result_ok(MessageId message_id, BufferSlice packet, size_t original_size) = 0;
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virtual void on_message_result_error(MessageId message_id, int code, string message) = 0;
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virtual void on_message_failed(MessageId message_id, Status status) = 0;
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virtual void on_message_info(MessageId message_id, int32 state, MessageId answer_message_id, int32 answer_size,
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int32 source) = 0;
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virtual Status on_destroy_auth_key() = 0;
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};
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double flush(SessionConnection::Callback *callback);
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// NB: Do not call force_close after on_closed callback
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void force_close(SessionConnection::Callback *callback);
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private:
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static constexpr int ACK_DELAY = 30; // 30s
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static constexpr double QUERY_DELAY = 0.001; // 0.001s
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static constexpr double RESEND_ANSWER_DELAY = 0.001; // 0.001s
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struct MsgInfo {
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MessageId message_id;
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int32 seq_no;
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size_t size;
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};
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friend StringBuilder &operator<<(StringBuilder &string_builder, const MsgInfo &info);
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bool online_flag_ = false;
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bool is_main_ = false;
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bool was_moved_ = false;
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double rtt() const {
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return max(2.0, raw_connection_->extra().rtt * 1.5 + 1);
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}
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double read_disconnect_delay() const {
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return online_flag_ ? rtt() * 3.5 : 135 + random_delay_;
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}
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double ping_disconnect_delay() const {
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return online_flag_ && is_main_ ? rtt() * 2.5 : 135 + random_delay_;
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}
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double ping_may_delay() const {
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return online_flag_ ? rtt() * 0.5 : 30 + random_delay_;
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}
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double ping_must_delay() const {
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return online_flag_ ? rtt() : 60 + random_delay_;
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}
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double http_max_wait() const {
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return 25.0; // 25s. Longer could be closed by proxy
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}
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static constexpr int HTTP_MAX_AFTER = 10; // 0.01s
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static constexpr int HTTP_MAX_DELAY = 30; // 0.03s
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vector<MtprotoQuery> to_send_;
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vector<MessageId> to_ack_message_ids_;
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double force_send_at_ = 0;
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struct ServiceQuery {
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enum Type { GetStateInfo, ResendAnswer } type_;
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MessageId container_message_id_;
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vector<int64> msg_ids_;
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};
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vector<MessageId> to_resend_answer_message_ids_;
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vector<MessageId> to_cancel_answer_message_ids_;
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vector<MessageId> to_get_state_info_message_ids_;
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FlatHashMap<MessageId, ServiceQuery, MessageIdHash> service_queries_;
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// nobody cleans up this map. But it should be really small.
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FlatHashMap<MessageId, vector<MessageId>, MessageIdHash> container_to_service_message_id_;
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double random_delay_ = 0;
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double last_read_at_ = 0;
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double last_ping_at_ = 0;
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double last_pong_at_ = 0;
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double real_last_read_at_ = 0;
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double real_last_pong_at_ = 0;
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int64 cur_ping_id_ = 0;
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MessageId last_ping_message_id_;
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MessageId last_ping_container_message_id_;
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uint64 last_read_size_ = 0;
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uint64 last_write_size_ = 0;
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bool need_destroy_auth_key_ = false;
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bool sent_destroy_auth_key_ = false;
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double flush_packet_at_ = 0;
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double last_get_future_salt_at_ = 0;
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enum { Init, Run, Fail, Closed } state_;
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Mode mode_;
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bool connected_flag_ = false;
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MessageId container_message_id_;
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MessageId main_message_id_;
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double created_at_ = 0;
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unique_ptr<RawConnection> raw_connection_;
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AuthData *auth_data_;
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SessionConnection::Callback *callback_ = nullptr;
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BufferSlice *current_buffer_slice_ = nullptr;
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BufferSlice as_buffer_slice(Slice packet);
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auto set_buffer_slice(BufferSlice *buffer_slice) TD_WARN_UNUSED_RESULT {
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auto old_buffer_slice = current_buffer_slice_;
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current_buffer_slice_ = buffer_slice;
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return ScopeExit() + [&to = current_buffer_slice_, from = old_buffer_slice] {
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to = from;
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};
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}
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void reset_server_time_difference(MessageId message_id);
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static Status parse_message(TlParser &parser, MsgInfo *info, Slice *packet,
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bool crypto_flag = true) TD_WARN_UNUSED_RESULT;
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Status parse_packet(TlParser &parser) TD_WARN_UNUSED_RESULT;
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Status on_packet_container(const MsgInfo &info, Slice packet) TD_WARN_UNUSED_RESULT;
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Status on_packet_rpc_result(const MsgInfo &info, Slice packet) TD_WARN_UNUSED_RESULT;
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template <class T>
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Status on_packet(const MsgInfo &info, const T &packet) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info,
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const mtproto_api::new_session_created &new_session_created) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info,
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const mtproto_api::bad_msg_notification &bad_msg_notification) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::bad_server_salt &bad_server_salt) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::msgs_ack &msgs_ack) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::gzip_packed &gzip_packed) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::pong &pong) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::future_salts &salts) TD_WARN_UNUSED_RESULT;
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Status on_msgs_state_info(const vector<int64> &msg_ids, Slice info) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::msgs_state_info &msgs_state_info) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::msgs_all_info &msgs_all_info) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::msg_detailed_info &msg_detailed_info) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info,
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const mtproto_api::msg_new_detailed_info &msg_new_detailed_info) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info, const mtproto_api::destroy_auth_key_ok &destroy_auth_key) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info,
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const mtproto_api::destroy_auth_key_none &destroy_auth_key) TD_WARN_UNUSED_RESULT;
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Status on_packet(const MsgInfo &info,
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const mtproto_api::destroy_auth_key_fail &destroy_auth_key) TD_WARN_UNUSED_RESULT;
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Status on_destroy_auth_key(const mtproto_api::DestroyAuthKeyRes &destroy_auth_key);
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Status on_slice_packet(const MsgInfo &info, Slice packet) TD_WARN_UNUSED_RESULT;
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Status on_main_packet(const PacketInfo &packet_info, Slice packet) TD_WARN_UNUSED_RESULT;
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void on_message_failed(MessageId message_id, Status status);
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void on_message_failed_inner(MessageId message_id);
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void do_close(Status status);
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void send_ack(MessageId message_id);
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void send_crypto(const Storer &storer, uint64 quick_ack_token);
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void send_before(double tm);
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bool may_ping() const;
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bool must_ping() const;
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bool must_flush_packet();
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void flush_packet();
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Status init() TD_WARN_UNUSED_RESULT;
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Status do_flush() TD_WARN_UNUSED_RESULT;
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Status before_write() final TD_WARN_UNUSED_RESULT;
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Status on_raw_packet(const PacketInfo &packet_info, BufferSlice packet) final;
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Status on_quick_ack(uint64 quick_ack_token) final;
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void on_read(size_t size) final;
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};
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} // namespace mtproto
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} // namespace td
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