355 lines
12 KiB
C++
355 lines
12 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/AuthData.h"
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#include "td/mtproto/PacketStorer.h"
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#include "td/mtproto/Query.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/logging.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Time.h"
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namespace td {
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namespace mtproto_api {
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class msg_container {
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public:
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static const int32 ID = 0x73f1f8dc;
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};
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} // namespace mtproto_api
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namespace mtproto {
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template <class Object, class ObjectStorer>
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class ObjectImpl {
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public:
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ObjectImpl(bool not_empty, Object &&object, AuthData *auth_data, bool need_ack = false)
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: not_empty_(not_empty), object_(std::move(object)), object_storer_(object_) {
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if (empty()) {
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return;
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}
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message_id_ = auth_data->next_message_id(Time::now_cached());
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seq_no_ = auth_data->next_seq_no(need_ack);
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}
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template <class T>
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void do_store(T &storer) const {
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if (empty()) {
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return;
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}
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storer.store_binary(message_id_);
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storer.store_binary(seq_no_);
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storer.store_binary(static_cast<int32>(object_storer_.size()));
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storer.store_storer(object_storer_);
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}
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bool not_empty() const {
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return not_empty_;
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}
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bool empty() const {
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return !not_empty_;
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}
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uint64 get_message_id() const {
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return message_id_;
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}
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private:
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bool not_empty_;
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Object object_;
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ObjectStorer object_storer_;
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uint64 message_id_;
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int32 seq_no_;
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};
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using AckImpl = ObjectImpl<mtproto_api::msgs_ack, TLObjectStorer<mtproto_api::msgs_ack>>;
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using PingImpl = ObjectImpl<mtproto_api::ping_delay_disconnect, TLStorer<mtproto_api::ping_delay_disconnect>>;
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using HttpWaitImpl = ObjectImpl<mtproto_api::http_wait, TLStorer<mtproto_api::http_wait>>;
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using GetFutureSaltsImpl = ObjectImpl<mtproto_api::get_future_salts, TLStorer<mtproto_api::get_future_salts>>;
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using ResendImpl = ObjectImpl<mtproto_api::msg_resend_req, TLObjectStorer<mtproto_api::msg_resend_req>>;
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using CancelImpl = ObjectImpl<mtproto_api::rpc_drop_answer, TLStorer<mtproto_api::rpc_drop_answer>>;
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using GetInfoImpl = ObjectImpl<mtproto_api::msgs_state_req, TLObjectStorer<mtproto_api::msgs_state_req>>;
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using DestroyAuthKeyImpl = ObjectImpl<mtproto_api::destroy_auth_key, TLStorer<mtproto_api::destroy_auth_key>>;
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class CancelVectorImpl {
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public:
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CancelVectorImpl(bool not_empty, const vector<int64> &to_cancel, AuthData *auth_data, bool need_ack) {
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storers_.reserve(to_cancel.size());
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for (auto &request_id : to_cancel) {
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storers_.emplace_back(true, mtproto_api::rpc_drop_answer(request_id), auth_data, true);
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}
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}
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template <class T>
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void do_store(T &storer) const {
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for (auto &s : storers_) {
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storer.store_storer(s);
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}
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}
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bool not_empty() const {
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return !storers_.empty();
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}
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uint64 get_message_id() const {
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CHECK(storers_.size() == 1);
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return storers_[0].get_message_id();
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}
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private:
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vector<PacketStorer<CancelImpl>> storers_;
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};
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class QueryImpl {
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public:
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QueryImpl(const MtprotoQuery &query, Slice header) : query_(query), header_(header) {
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}
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template <class T>
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void do_store(T &storer) const {
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storer.store_binary(query_.message_id);
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storer.store_binary(query_.seq_no);
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Slice header = this->header_;
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Slice invoke_header = Slice();
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// TODO(refactor):
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// invokeAfterMsg#cb9f372d {X:Type} msg_id:long query:!X = X;
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// This code makes me very sad.
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// InvokeAfterMsg is not even in mtproto_api. It is in telegram_api.
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#pragma pack(push, 4)
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struct {
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uint32 constructor_id;
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uint64 invoke_after_id;
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} invoke_data;
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#pragma pack(pop)
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if (query_.invoke_after_id != 0) {
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invoke_data.constructor_id = 0xcb9f372d;
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invoke_data.invoke_after_id = query_.invoke_after_id;
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invoke_header = Slice(reinterpret_cast<const uint8 *>(&invoke_data), sizeof(invoke_data));
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}
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Slice data = query_.packet.as_slice();
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mtproto_api::gzip_packed packed(data);
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auto plain_storer = create_storer(data);
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auto gzip_storer = create_storer(packed);
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const Storer &data_storer =
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query_.gzip_flag ? static_cast<const Storer &>(gzip_storer) : static_cast<const Storer &>(plain_storer);
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auto invoke_header_storer = create_storer(invoke_header);
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auto header_storer = create_storer(header);
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auto suff_storer = create_storer(invoke_header_storer, data_storer);
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auto all_storer = create_storer(header_storer, suff_storer);
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storer.store_binary(static_cast<uint32>(all_storer.size()));
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storer.store_storer(all_storer);
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}
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private:
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const MtprotoQuery &query_;
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Slice header_;
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};
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class QueryVectorImpl {
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public:
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QueryVectorImpl(const vector<MtprotoQuery> &to_send, Slice header) : to_send_(to_send), header_(header) {
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}
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template <class T>
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void do_store(T &storer) const {
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if (to_send_.empty()) {
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return;
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}
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for (auto &query : to_send_) {
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storer.store_storer(PacketStorer<QueryImpl>(query, header_));
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}
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}
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private:
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const vector<MtprotoQuery> &to_send_;
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Slice header_;
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};
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class ContainerImpl {
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public:
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ContainerImpl(int32 cnt, Storer &storer) : cnt_(cnt), storer_(storer) {
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}
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template <class T>
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void do_store(T &storer) const {
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storer.store_binary(mtproto_api::msg_container::ID);
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storer.store_binary(cnt_);
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storer.store_storer(storer_);
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}
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private:
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int32 cnt_;
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Storer &storer_;
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};
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class CryptoImpl {
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public:
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CryptoImpl(const vector<MtprotoQuery> &to_send, Slice header, vector<int64> &&to_ack, int64 ping_id, int ping_timeout,
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int max_delay, int max_after, int max_wait, int future_salt_n, vector<int64> get_info,
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vector<int64> resend, vector<int64> cancel, bool destroy_key, AuthData *auth_data, uint64 *container_id,
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uint64 *get_info_id, uint64 *resend_id, uint64 *ping_message_id, uint64 *parent_message_id)
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: query_storer_(to_send, header)
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, ack_empty_(to_ack.empty())
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, ack_storer_(!ack_empty_, mtproto_api::msgs_ack(std::move(to_ack)), auth_data)
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, ping_storer_(ping_id != 0, mtproto_api::ping_delay_disconnect(ping_id, ping_timeout), auth_data)
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, http_wait_storer_(max_delay >= 0, mtproto_api::http_wait(max_delay, max_after, max_wait), auth_data)
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, get_future_salts_storer_(future_salt_n > 0, mtproto_api::get_future_salts(future_salt_n), auth_data)
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, get_info_not_empty_(!get_info.empty())
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, get_info_storer_(get_info_not_empty_, mtproto_api::msgs_state_req(std::move(get_info)), auth_data, true)
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, resend_not_empty_(!resend.empty())
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, resend_storer_(resend_not_empty_, mtproto_api::msg_resend_req(std::move(resend)), auth_data, true)
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, cancel_not_empty_(!cancel.empty())
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, cancel_cnt_(static_cast<int32>(cancel.size()))
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, cancel_storer_(cancel_not_empty_, std::move(cancel), auth_data, true)
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, destroy_key_storer_(destroy_key, mtproto_api::destroy_auth_key(), auth_data, true)
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, tmp_storer_(query_storer_, ack_storer_)
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, tmp2_storer_(tmp_storer_, http_wait_storer_)
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, tmp3_storer_(tmp2_storer_, get_future_salts_storer_)
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, tmp4_storer_(tmp3_storer_, get_info_storer_)
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, tmp5_storer_(tmp4_storer_, resend_storer_)
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, tmp6_storer_(tmp5_storer_, cancel_storer_)
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, tmp7_storer_(tmp6_storer_, destroy_key_storer_)
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, concat_storer_(tmp7_storer_, ping_storer_)
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, cnt_(static_cast<int32>(to_send.size()) + ack_storer_.not_empty() + ping_storer_.not_empty() +
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http_wait_storer_.not_empty() + get_future_salts_storer_.not_empty() + get_info_storer_.not_empty() +
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resend_storer_.not_empty() + cancel_cnt_ + destroy_key_storer_.not_empty())
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, container_storer_(cnt_, concat_storer_) {
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CHECK(cnt_ != 0);
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if (get_info_storer_.not_empty() && get_info_id) {
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*get_info_id = get_info_storer_.get_message_id();
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}
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if (resend_storer_.not_empty() && resend_id) {
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*resend_id = resend_storer_.get_message_id();
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}
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if (ping_storer_.not_empty() && ping_message_id) {
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*ping_message_id = ping_storer_.get_message_id();
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}
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if (cnt_ > 1 ||
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(!to_send.empty() && !auth_data->is_valid_outbound_msg_id(to_send[0].message_id, Time::now_cached()))) {
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type_ = Mixed;
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message_id_ = auth_data->next_message_id(Time::now_cached());
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seq_no_ = auth_data->next_seq_no(false);
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*container_id = message_id_;
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*parent_message_id = message_id_;
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} else if (!to_send.empty()) {
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CHECK(to_send.size() == 1u);
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type_ = OnlyQuery;
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*parent_message_id = to_send[0].message_id;
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} else if (ack_storer_.not_empty()) {
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type_ = OnlyAck;
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*parent_message_id = ack_storer_.get_message_id();
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} else if (ping_storer_.not_empty()) {
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type_ = OnlyPing;
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*parent_message_id = ping_storer_.get_message_id();
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} else if (http_wait_storer_.not_empty()) {
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type_ = OnlyHttpWait;
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*parent_message_id = http_wait_storer_.get_message_id();
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} else if (get_future_salts_storer_.not_empty()) {
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type_ = OnlyGetFutureSalts;
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*parent_message_id = get_future_salts_storer_.get_message_id();
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} else if (get_info_storer_.not_empty()) {
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type_ = OnlyGetInfo;
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*parent_message_id = get_info_storer_.get_message_id();
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} else if (resend_storer_.not_empty()) {
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type_ = OnlyResend;
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*parent_message_id = resend_storer_.get_message_id();
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} else if (cancel_storer_.not_empty()) {
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type_ = OnlyCancel;
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*parent_message_id = cancel_storer_.get_message_id();
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} else if (destroy_key_storer_.not_empty()) {
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type_ = OnlyDestroyKey;
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*parent_message_id = destroy_key_storer_.get_message_id();
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} else {
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UNREACHABLE();
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}
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}
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template <class T>
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void do_store(T &storer) const {
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switch (type_) {
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case OnlyAck:
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return storer.store_storer(ack_storer_);
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case OnlyQuery:
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return storer.store_storer(query_storer_);
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case OnlyPing:
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return storer.store_storer(ping_storer_);
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case OnlyHttpWait:
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return storer.store_storer(http_wait_storer_);
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case OnlyGetFutureSalts:
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return storer.store_storer(get_future_salts_storer_);
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case OnlyResend:
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return storer.store_storer(resend_storer_);
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case OnlyCancel:
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return storer.store_storer(cancel_storer_);
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case OnlyGetInfo:
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return storer.store_storer(get_info_storer_);
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case OnlyDestroyKey:
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return storer.store_storer(destroy_key_storer_);
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default:
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storer.store_binary(message_id_);
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storer.store_binary(seq_no_);
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storer.store_binary(static_cast<int32>(container_storer_.size()));
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storer.store_storer(container_storer_);
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}
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}
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private:
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PacketStorer<QueryVectorImpl> query_storer_;
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bool ack_empty_;
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PacketStorer<AckImpl> ack_storer_;
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PacketStorer<PingImpl> ping_storer_;
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PacketStorer<HttpWaitImpl> http_wait_storer_;
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PacketStorer<GetFutureSaltsImpl> get_future_salts_storer_;
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bool get_info_not_empty_;
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PacketStorer<GetInfoImpl> get_info_storer_;
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bool resend_not_empty_;
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PacketStorer<ResendImpl> resend_storer_;
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bool cancel_not_empty_;
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int32 cancel_cnt_;
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PacketStorer<CancelVectorImpl> cancel_storer_;
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PacketStorer<DestroyAuthKeyImpl> destroy_key_storer_;
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ConcatStorer tmp_storer_;
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ConcatStorer tmp2_storer_;
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ConcatStorer tmp3_storer_;
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ConcatStorer tmp4_storer_;
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ConcatStorer tmp5_storer_;
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ConcatStorer tmp6_storer_;
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ConcatStorer tmp7_storer_;
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ConcatStorer concat_storer_;
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int32 cnt_;
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PacketStorer<ContainerImpl> container_storer_;
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enum Type {
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OnlyQuery,
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OnlyAck,
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OnlyPing,
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OnlyHttpWait,
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OnlyGetFutureSalts,
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OnlyResend,
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OnlyCancel,
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OnlyGetInfo,
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OnlyDestroyKey,
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Mixed
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};
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Type type_;
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uint64 message_id_;
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int32 seq_no_;
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};
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} // namespace mtproto
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} // namespace td
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