tdesktop/Telegram/SourceFiles/mtproto/facade.h

242 lines
7.2 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
#include "mtproto/core_types.h"
#include "mtproto/session.h"
#include "core/single_timer.h"
#include "mtproto/mtp_instance.h"
namespace MTP {
namespace internal {
bool paused();
void pause();
void unpause();
constexpr auto kDcShift = ShiftedDcId(10000);
constexpr auto kConfigDcShift = 0x01;
constexpr auto kLogoutDcShift = 0x02;
constexpr auto kMaxMediaDcCount = 0x10;
constexpr auto kBaseDownloadDcShift = 0x10;
constexpr auto kBaseUploadDcShift = 0x20;
constexpr auto kDestroyKeyStartDcShift = 0x100;
} // namespace internal
class PauseHolder {
public:
PauseHolder() {
restart();
}
void restart() {
if (!std::exchange(_paused, true)) {
internal::pause();
}
}
void release() {
if (std::exchange(_paused, false)) {
internal::unpause();
}
}
~PauseHolder() {
release();
}
private:
bool _paused = false;
};
constexpr DcId bareDcId(ShiftedDcId shiftedDcId) {
return (shiftedDcId % internal::kDcShift);
}
constexpr ShiftedDcId shiftDcId(DcId dcId, int value) {
return dcId + internal::kDcShift * value;
}
constexpr int getDcIdShift(ShiftedDcId shiftedDcId) {
return shiftedDcId / internal::kDcShift;
}
// send(MTPhelp_GetConfig(), MTP::configDcId(dc)) - for dc enumeration
constexpr ShiftedDcId configDcId(DcId dcId) {
return shiftDcId(dcId, internal::kConfigDcShift);
}
// send(MTPauth_LogOut(), MTP::logoutDcId(dc)) - for logout of guest dcs enumeration
constexpr ShiftedDcId logoutDcId(DcId dcId) {
return shiftDcId(dcId, internal::kLogoutDcShift);
}
constexpr auto kDownloadSessionsCount = 2;
constexpr auto kUploadSessionsCount = 2;
namespace internal {
constexpr ShiftedDcId downloadDcId(DcId dcId, int index) {
static_assert(kDownloadSessionsCount < internal::kMaxMediaDcCount, "Too large MTPDownloadSessionsCount!");
return shiftDcId(dcId, internal::kBaseDownloadDcShift + index);
};
} // namespace internal
// send(req, callbacks, MTP::downloadDcId(dc, index)) - for download shifted dc id
inline ShiftedDcId downloadDcId(DcId dcId, int index) {
Expects(index >= 0 && index < kDownloadSessionsCount);
return internal::downloadDcId(dcId, index);
}
inline constexpr bool isDownloadDcId(ShiftedDcId shiftedDcId) {
return (shiftedDcId >= internal::downloadDcId(0, 0)) && (shiftedDcId < internal::downloadDcId(0, kDownloadSessionsCount - 1) + internal::kDcShift);
}
inline bool isCdnDc(MTPDdcOption::Flags flags) {
return (flags & MTPDdcOption::Flag::f_cdn);
}
namespace internal {
constexpr ShiftedDcId uploadDcId(DcId dcId, int index) {
static_assert(kUploadSessionsCount < internal::kMaxMediaDcCount, "Too large MTPUploadSessionsCount!");
return shiftDcId(dcId, internal::kBaseUploadDcShift + index);
};
} // namespace internal
// send(req, callbacks, MTP::uploadDcId(index)) - for upload shifted dc id
// uploading always to the main dc so bareDcId == 0
inline ShiftedDcId uploadDcId(int index) {
Expects(index >= 0 && index < kUploadSessionsCount);
return internal::uploadDcId(0, index);
};
constexpr bool isUploadDcId(ShiftedDcId shiftedDcId) {
return (shiftedDcId >= internal::uploadDcId(0, 0)) && (shiftedDcId < internal::uploadDcId(0, kUploadSessionsCount - 1) + internal::kDcShift);
}
inline ShiftedDcId destroyKeyNextDcId(ShiftedDcId shiftedDcId) {
auto shift = getDcIdShift(shiftedDcId);
return shiftDcId(bareDcId(shiftedDcId), shift ? (shift + 1) : internal::kDestroyKeyStartDcShift);
}
enum {
DisconnectedState = 0,
ConnectingState = 1,
ConnectedState = 2,
};
enum {
RequestSent = 0,
RequestConnecting = 1,
RequestSending = 2
};
Instance *MainInstance();
inline void restart() {
return MainInstance()->restart();
}
inline void restart(ShiftedDcId shiftedDcId) {
return MainInstance()->restart(shiftedDcId);
}
inline DcId maindc() {
return MainInstance()->mainDcId();
}
inline int32 dcstate(ShiftedDcId shiftedDcId = 0) {
if (auto instance = MainInstance()) {
return instance->dcstate(shiftedDcId);
}
return DisconnectedState;
}
inline QString dctransport(ShiftedDcId shiftedDcId = 0) {
if (auto instance = MainInstance()) {
return instance->dctransport(shiftedDcId);
}
return QString();
}
template <typename TRequest>
inline mtpRequestId send(const TRequest &request, RPCResponseHandler callbacks = RPCResponseHandler(), ShiftedDcId dcId = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
return MainInstance()->send(request, std::move(callbacks), dcId, msCanWait, after);
}
template <typename TRequest>
inline mtpRequestId send(const TRequest &request, RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail = RPCFailHandlerPtr(), ShiftedDcId dcId = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
return MainInstance()->send(request, std::move(onDone), std::move(onFail), dcId, msCanWait, after);
}
inline void sendAnything(ShiftedDcId shiftedDcId = 0, TimeMs msCanWait = 0) {
return MainInstance()->sendAnything(shiftedDcId, msCanWait);
}
inline void cancel(mtpRequestId requestId) {
return MainInstance()->cancel(requestId);
}
inline void ping() {
return MainInstance()->ping();
}
inline void killSession(ShiftedDcId shiftedDcId) {
return MainInstance()->killSession(shiftedDcId);
}
inline void stopSession(ShiftedDcId shiftedDcId) {
return MainInstance()->stopSession(shiftedDcId);
}
inline int32 state(mtpRequestId requestId) { // < 0 means waiting for such count of ms
return MainInstance()->state(requestId);
}
namespace internal {
template <typename TRequest>
mtpRequestId Session::send(const TRequest &request, RPCResponseHandler callbacks, TimeMs msCanWait, bool needsLayer, bool toMainDC, mtpRequestId after) {
mtpRequestId requestId = 0;
try {
uint32 requestSize = request.innerLength() >> 2;
mtpRequest reqSerialized(mtpRequestData::prepare(requestSize));
request.write(*reqSerialized);
DEBUG_LOG(("MTP Info: adding request to toSendMap, msCanWait %1").arg(msCanWait));
reqSerialized->msDate = getms(true); // > 0 - can send without container
reqSerialized->needsLayer = needsLayer;
if (after) reqSerialized->after = getRequest(after);
requestId = storeRequest(reqSerialized, callbacks);
sendPrepared(reqSerialized, msCanWait);
} catch (Exception &e) {
requestId = 0;
rpcErrorOccured(requestId, callbacks.onFail, rpcClientError("NO_REQUEST_ID", QString("send() failed to queue request, exception: %1").arg(e.what())));
}
if (requestId) registerRequest(requestId, toMainDC ? -getDcWithShift() : getDcWithShift());
return requestId;
}
} // namespace internal
} // namespace MTP