MTP global state moved to MTP::Instance class.

Now there will be ability to start multiple mtproto instances.

Telegram/SourceFiles/app.cpp

@@ -226,11 +226,11 @@ namespace {
 } // namespace
 
 	void logOut() {
-		if (MTP::started()) {
-			MTP::logoutKeys(rpcDone(&loggedOut), rpcFail(&loggedOut));
+		if (auto mtproto = Messenger::Instance().mtp()) {
+			mtproto->logout(rpcDone(&loggedOut), rpcFail(&loggedOut));
 		} else {
 			loggedOut();
-			MTP::start();
+			Messenger::Instance().startMtp();
 		}
 	}
 

Telegram/SourceFiles/core/utils.cpp

@@ -124,7 +124,7 @@ void unixtimeSet(int32 serverTime, bool force) {
 }
 
 TimeId unixtime() {
-	TimeId result = myunixtime();
+	auto result = myunixtime();
 
 	QReadLocker locker(&unixtimeLock);
 	return result + unixtimeDelta;

Telegram/SourceFiles/core/utils.h

@@ -23,6 +23,7 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "core/basic_types.h"
 #include <array>
 #include <algorithm>
+#include <set>
 
 namespace base {
 
@@ -89,6 +90,50 @@ inline bool contains(const Container &container, const T &value) {
 	return std::find(std::begin(container), end, value) != end;
 }
 
+// We need a custom comparator for std::set<std::unique_ptr<T>>::find to work with pointers.
+// thanks to http://stackoverflow.com/questions/18939882/raw-pointer-lookup-for-sets-of-unique-ptrs
+template <typename T>
+struct pointer_comparator {
+	using is_transparent = std::true_type;
+
+	// helper does some magic in order to reduce the number of
+	// pairs of types we need to know how to compare: it turns
+	// everything into a pointer, and then uses `std::less<T*>`
+	// to do the comparison:
+	struct helper {
+		T *ptr = nullptr;
+		helper() = default;
+		helper(const helper &other) = default;
+		helper(T *p) : ptr(p) {
+		}
+		template <typename ...Ts>
+		helper(const std::shared_ptr<Ts...> &other) : ptr(other.get()) {
+		}
+		template <typename ...Ts>
+		helper(const std::unique_ptr<Ts...> &other) : ptr(other.get()) {
+		}
+		bool operator<(helper other) const {
+			return std::less<T*>()(ptr, other.ptr);
+		}
+	};
+
+	// without helper, we'd need 2^n different overloads, where
+	// n is the number of types we want to support (so, 8 with
+	// raw pointers, unique pointers, and shared pointers).  That
+	// seems silly.
+	// && helps enforce rvalue use only
+	bool operator()(const helper &&lhs, const helper &&rhs) const {
+		return lhs < rhs;
+	}
+
+};
+
+template <typename T>
+using set_of_unique_ptr = std::set<std::unique_ptr<T>, base::pointer_comparator<T>>;
+
+template <typename T>
+using set_of_shared_ptr = std::set<std::shared_ptr<T>, base::pointer_comparator<T>>;
+
 } // namespace base
 
 // using for_const instead of plain range-based for loop to ensure usage of const_iterator
@@ -162,7 +207,6 @@ inline void t_assert_fail(const char *message, const char *file, int32 line) {
 
 class Exception : public std::exception {
 public:
-
 	Exception(const QString &msg, bool isFatal = true) : _fatal(isFatal), _msg(msg.toUtf8()) {
 		LOG(("Exception: %1").arg(msg));
 	}
@@ -179,6 +223,7 @@ public:
 private:
 	bool _fatal;
 	QByteArray _msg;
+
 };
 
 class MTPint;

Telegram/SourceFiles/intro/introwidget.cpp

@@ -265,7 +265,7 @@ bool Widget::resetFail(const RPCError &error) {
 void Widget::gotNearestDC(const MTPNearestDc &result) {
 	auto &nearest = result.c_nearestDc();
 	DEBUG_LOG(("Got nearest dc, country: %1, nearest: %2, this: %3").arg(nearest.vcountry.c_string().v.c_str()).arg(nearest.vnearest_dc.v).arg(nearest.vthis_dc.v));
-	MTP::setdc(nearest.vnearest_dc.v, true);
+	Messenger::Instance().mtp()->suggestMainDcId(nearest.vnearest_dc.v);
 	auto nearestCountry = qs(nearest.vcountry);
 	if (getData()->country != nearestCountry) {
 		getData()->country = nearestCountry;

Telegram/SourceFiles/localstorage.cpp

@@ -504,7 +504,7 @@ enum { // Local Storage Keys
 enum {
 	dbiKey = 0x00,
 	dbiUser = 0x01,
-	dbiDcOptionOld = 0x02,
+	dbiDcOptionOldOld = 0x02,
 	dbiChatSizeMax = 0x03,
 	dbiMutePeer = 0x04,
 	dbiSendKey = 0x05,
@@ -541,7 +541,7 @@ enum {
 	dbiRecentEmojiOld = 0x24,
 	dbiEmojiVariantsOld = 0x25,
 	dbiRecentStickers = 0x26,
-	dbiDcOption = 0x27,
+	dbiDcOptionOld = 0x27,
 	dbiTryIPv6 = 0x28,
 	dbiSongVolume = 0x29,
 	dbiWindowsNotificationsOld = 0x30,
@@ -567,6 +567,7 @@ enum {
 	dbiDialogsWidthRatio = 0x48,
 	dbiUseExternalVideoPlayer = 0x49,
 	dbiDcOptions = 0x4a,
+	dbiMtpAuthorization = 0x4b,
 
 	dbiEncryptedWithSalt = 333,
 	dbiEncrypted = 444,
@@ -843,7 +844,7 @@ void applyReadContext(const ReadSettingsContext &context) {
 
 bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSettingsContext &context) {
 	switch (blockId) {
-	case dbiDcOptionOld: {
+	case dbiDcOptionOldOld: {
 		quint32 dcId, port;
 		QString host, ip;
 		stream >> dcId >> host >> ip >> port;
@@ -852,7 +853,7 @@ bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSetting
 		context.dcOptions.constructAddOne(dcId, 0, ip.toStdString(), port);
 	} break;
 
-	case dbiDcOption: {
+	case dbiDcOptionOld: {
 		quint32 dcIdWithShift, port;
 		qint32 flags;
 		QString ip;
@@ -863,7 +864,7 @@ bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSetting
 	} break;
 
 	case dbiDcOptions: {
-		QByteArray serialized;
+		auto serialized = QByteArray();
 		stream >> serialized;
 		if (!_checkStreamStatus(stream)) return false;
 
@@ -909,8 +910,7 @@ bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSetting
 		if (!_checkStreamStatus(stream)) return false;
 
 		DEBUG_LOG(("MTP Info: user found, dc %1, uid %2").arg(dcId).arg(userId));
-		MTP::configure(dcId);
-
+		Messenger::Instance().setMtpMainDcId(dcId);
 		if (userId) {
 			Messenger::Instance().authSessionCreate(UserId(userId));
 		}
@@ -923,7 +923,15 @@ bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSetting
 		stream.readRawData(key.data(), key.size());
 		if (!_checkStreamStatus(stream)) return false;
 
-		MTP::setKey(dcId, key);
+		Messenger::Instance().setMtpKey(dcId, key);
+	} break;
+
+	case dbiMtpAuthorization: {
+		auto serialized = QByteArray();
+		stream >> serialized;
+		if (!_checkStreamStatus(stream)) return false;
+
+		Messenger::Instance().setMtpAuthorization(serialized);
 	} break;
 
 	case dbiAutoStart: {
@@ -1777,18 +1785,12 @@ void _writeMtpData() {
 		return;
 	}
 
-	auto keys = MTP::getKeys();
+	auto mtpAuthorizationSerialized = Messenger::Instance().serializeMtpAuthorization();
 
-	quint32 size = sizeof(quint32) + sizeof(qint32) + sizeof(quint32);
-	size += keys.size() * (sizeof(quint32) + sizeof(quint32) + MTP::AuthKey::kSize);
+	quint32 size = sizeof(quint32) + Serialize::bytearraySize(mtpAuthorizationSerialized);
 
 	EncryptedDescriptor data(size);
-	data.stream << quint32(dbiUser) << qint32(AuthSession::CurrentUserId()) << quint32(MTP::maindc());
-	for_const (auto &key, keys) {
-		data.stream << quint32(dbiKey) << quint32(key->getDC());
-		key->write(data.stream);
-	}
-
+	data.stream << quint32(dbiMtpAuthorization) << mtpAuthorizationSerialized;
 	mtp.writeEncrypted(data);
 }
 

Telegram/SourceFiles/logs.cpp

@@ -25,6 +25,7 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include <new>
 
 #include "pspecific.h"
+#include "mtproto/connection.h"
 
 #ifndef TDESKTOP_DISABLE_CRASH_REPORTS
 
@@ -87,9 +88,8 @@ QString _logsEntryStart() {
 	static int32 index = 0;
 	QDateTime tm(QDateTime::currentDateTime());
 
-	QThread *thread = QThread::currentThread();
-	MTP::internal::Thread *mtpThread = qobject_cast<MTP::internal::Thread*>(thread);
-	uint threadId = mtpThread ? mtpThread->getThreadId() : 0;
+	auto thread = qobject_cast<MTP::internal::Thread*>(QThread::currentThread());
+	auto threadId = thread ? thread->getThreadIndex() : 0;
 
 	return QString("[%1 %2-%3]").arg(tm.toString("hh:mm:ss.zzz")).arg(QString("%1").arg(threadId, 2, 10, QChar('0'))).arg(++index, 7, 10, QChar('0'));
 }

Telegram/SourceFiles/mainwidget.cpp

@@ -82,7 +82,9 @@ MainWidget::MainWidget(QWidget *parent) : TWidget(parent)
 , _playerPanel(this, Media::Player::Panel::Layout::Full)
 , _mediaType(this, st::defaultDropdownMenu)
 , _api(new ApiWrap(this)) {
-	MTP::setGlobalDoneHandler(rpcDone(&MainWidget::updateReceived));
+	Messenger::Instance().mtp()->setUpdatesHandler(rpcDone(&MainWidget::updateReceived));
+	Messenger::Instance().mtp()->setGlobalFailHandler(rpcFail(&MainWidget::updateFail));
+
 	_ptsWaiter.setRequesting(true);
 	updateScrollColors();
 
@@ -174,8 +176,6 @@ MainWidget::MainWidget(QWidget *parent) : TWidget(parent)
 
 	orderWidgets();
 
-	MTP::setGlobalFailHandler(rpcFail(&MainWidget::updateFail));
-
 	_mediaType->hide();
 	_mediaType->setOrigin(Ui::PanelAnimation::Origin::TopRight);
 	_topBar->mediaTypeButton()->installEventFilter(_mediaType);
@@ -4279,7 +4279,7 @@ MainWidget::~MainWidget() {
 		_hider = nullptr;
 		delete hider;
 	}
-	MTP::clearGlobalHandlers();
+	Messenger::Instance().mtp()->clearGlobalHandlers();
 
 	if (App::wnd()) App::wnd()->noMain(this);
 }

Telegram/SourceFiles/messenger.cpp

@@ -32,6 +32,7 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "fileuploader.h"
 #include "mainwidget.h"
 #include "mtproto/dc_options.h"
+#include "mtproto/mtp_instance.h"
 #include "media/player/media_player_instance.h"
 #include "window/notifications_manager.h"
 #include "window/themes/window_theme.h"
@@ -43,25 +44,18 @@ namespace {
 
 Messenger *SingleInstance = nullptr;
 
-void mtpStateChanged(int32 dc, int32 state) {
-	if (App::wnd()) {
-		App::wnd()->mtpStateChanged(dc, state);
-	}
-}
-
-void mtpSessionReset(int32 dc) {
-	if (App::main() && dc == MTP::maindc()) {
-		App::main()->getDifference();
-	}
-}
-
 } // namespace
 
 Messenger *Messenger::InstancePointer() {
 	return SingleInstance;
 }
 
-Messenger::Messenger() : QObject() {
+struct Messenger::Private {
+	MTP::Instance::Config mtpConfig;
+};
+
+Messenger::Messenger() : QObject()
+, _private(std::make_unique<Private>()) {
 	t_assert(SingleInstance == nullptr);
 	SingleInstance = this;
 
@@ -126,12 +120,9 @@ Messenger::Messenger() : QObject() {
 		DEBUG_LOG(("Application Info: passcode needed..."));
 	} else {
 		DEBUG_LOG(("Application Info: local map read..."));
-		MTP::start();
+		startMtp();
 	}
 
-	MTP::setStateChangedHandler(mtpStateChanged);
-	MTP::setSessionResetHandler(mtpSessionReset);
-
 	DEBUG_LOG(("Application Info: MTP started..."));
 
 	DEBUG_LOG(("Application Info: showing."));
@@ -168,6 +159,107 @@ Messenger::Messenger() : QObject() {
 	}
 }
 
+void Messenger::setMtpMainDcId(MTP::DcId mainDcId) {
+	t_assert(!_mtproto);
+	_private->mtpConfig.mainDcId = mainDcId;
+}
+
+void Messenger::setMtpKey(MTP::DcId dcId, const MTP::AuthKey::Data &keyData) {
+	t_assert(!_mtproto);
+	_private->mtpConfig.keys.insert(std::make_pair(dcId, keyData));
+}
+
+QByteArray Messenger::serializeMtpAuthorization() const {
+	auto serialize = [this](auto keysCount, auto mainDcId, auto writeKeys) {
+		auto result = QByteArray();
+		auto size = sizeof(qint32) + sizeof(qint32) + sizeof(qint32); // userId + mainDcId + keys count
+		size += keysCount * (sizeof(qint32) + MTP::AuthKey::Data().size());
+		result.reserve(size);
+		{
+			QBuffer buffer(&result);
+			if (!buffer.open(QIODevice::WriteOnly)) {
+				LOG(("MTP Error: could not open buffer to serialize mtp authorization."));
+				return result;
+			}
+			QDataStream stream(&buffer);
+			stream.setVersion(QDataStream::Qt_5_1);
+
+			stream << qint32(AuthSession::CurrentUserId()) << qint32(mainDcId) << qint32(keysCount);
+			writeKeys(stream);
+		}
+		return result;
+	};
+	if (_mtproto) {
+		auto keys = _mtproto->getKeysForWrite();
+		return serialize(keys.size(), _mtproto->mainDcId(), [&keys](QDataStream &stream) {
+			for (auto &key : keys) {
+				stream << qint32(key->getDC());
+				key->write(stream);
+			}
+		});
+	}
+	auto &keys = _private->mtpConfig.keys;
+	return serialize(keys.size(), _private->mtpConfig.mainDcId, [&keys](QDataStream &stream) {
+		for (auto &key : keys) {
+			stream << qint32(key.first);
+			stream.writeRawData(key.second.data(), key.second.size());
+		}
+	});
+}
+
+void Messenger::setMtpAuthorization(const QByteArray &serialized) {
+	t_assert(!_mtproto);
+	t_assert(!authSession());
+
+	auto readonly = serialized;
+	QBuffer buffer(&readonly);
+	if (!buffer.open(QIODevice::ReadOnly)) {
+		LOG(("MTP Error: could not open serialized mtp authorization for reading."));
+		return;
+	}
+	QDataStream stream(&buffer);
+	stream.setVersion(QDataStream::Qt_5_1);
+
+	qint32 userId = 0, mainDcId = 0, count = 0;
+	stream >> userId >> mainDcId >> count;
+	if (stream.status() != QDataStream::Ok) {
+		LOG(("MTP Error: could not read main fields from serialized mtp authorization."));
+		return;
+	}
+
+	if (userId) {
+		authSessionCreate(userId);
+	}
+	_private->mtpConfig.mainDcId = mainDcId;
+	for (auto i = 0; i != count; ++i) {
+		qint32 dcId = 0;
+		MTP::AuthKey::Data keyData;
+		stream >> dcId;
+		stream.readRawData(keyData.data(), keyData.size());
+		if (stream.status() != QDataStream::Ok) {
+			LOG(("MTP Error: could not read key from serialized mtp authorization."));
+			return;
+		}
+		_private->mtpConfig.keys.insert(std::make_pair(dcId, keyData));
+	}
+}
+
+void Messenger::startMtp() {
+	t_assert(!_mtproto);
+	_mtproto = std::make_unique<MTP::Instance>(_dcOptions.get(), std::move(_private->mtpConfig));
+
+	_mtproto->setStateChangedHandler([](MTP::ShiftedDcId shiftedDcId, int32 state) {
+		if (App::wnd()) {
+			App::wnd()->mtpStateChanged(shiftedDcId, state);
+		}
+	});
+	_mtproto->setSessionResetHandler([](MTP::ShiftedDcId shiftedDcId) {
+		if (App::main() && shiftedDcId == MTP::maindc()) {
+			App::main()->getDifference();
+		}
+	});
+}
+
 void Messenger::loadLanguage() {
 	if (cLang() < languageTest) {
 		cSetLang(Sandbox::LangSystem());
@@ -199,10 +291,12 @@ void Messenger::startLocalStorage() {
 	_dcOptions = std::make_unique<MTP::DcOptions>();
 	_dcOptions->constructFromBuiltIn();
 	Local::start();
-	subscribe(_dcOptions->changed(), [](const MTP::DcOptions::Ids &ids) {
+	subscribe(_dcOptions->changed(), [this](const MTP::DcOptions::Ids &ids) {
 		Local::writeSettings();
-		for (auto id : ids) {
-			MTP::restart(id);
+		if (auto instance = mtp()) {
+			for (auto id : ids) {
+				instance->restart(id);
+			}
 		}
 	});
 }
@@ -499,7 +593,7 @@ void Messenger::checkMapVersion() {
 
 void Messenger::prepareToDestroy() {
 	_window.reset();
-	MTP::finish();
+	_mtproto.reset();
 }
 
 Messenger::~Messenger() {

Telegram/SourceFiles/messenger.h

@@ -24,6 +24,7 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 
 namespace MTP {
 class DcOptions;
+class Instance;
 } // namespace MTP
 
 class AuthSession;
@@ -55,6 +56,16 @@ public:
 	MTP::DcOptions *dcOptions() {
 		return _dcOptions.get();
 	}
+
+	void setMtpMainDcId(MTP::DcId mainDcId);
+	void setMtpKey(MTP::DcId dcId, const MTP::AuthKey::Data &keyData);
+	QByteArray serializeMtpAuthorization() const;
+	void setMtpAuthorization(const QByteArray &serialized);
+	void startMtp();
+	MTP::Instance *mtp() {
+		return _mtproto.get();
+	}
+
 	AuthSession *authSession() {
 		return _authSession.get();
 	}
@@ -114,13 +125,16 @@ private:
 	QMap<int32, TimeMs> killDownloadSessionTimes;
 	SingleTimer killDownloadSessionsTimer;
 
-	TimeMs _lastActionTime = 0;
+	// Some fields are just moved from the declaration.
+	struct Private;
+	const std::unique_ptr<Private> _private;
 
 	std::unique_ptr<MainWindow> _window;
 	FileUploader *_uploader = nullptr;
 	Translator *_translator = nullptr;
 
 	std::unique_ptr<MTP::DcOptions> _dcOptions;
+	std::unique_ptr<MTP::Instance> _mtproto;
 	std::unique_ptr<AuthSession> _authSession;
 
 };

Telegram/SourceFiles/mtproto/connection.cpp

@@ -40,9 +40,31 @@ using std::string;
 
 namespace MTP {
 namespace internal {
-
 namespace {
 
+void wrapInvokeAfter(mtpRequest &to, const mtpRequest &from, const mtpRequestMap &haveSent, int32 skipBeforeRequest = 0) {
+	mtpMsgId afterId(*(mtpMsgId*)(from->after->data() + 4));
+	mtpRequestMap::const_iterator i = afterId ? haveSent.constFind(afterId) : haveSent.cend();
+	int32 size = to->size(), lenInInts = (from.innerLength() >> 2), headlen = 4, fulllen = headlen + lenInInts;
+	if (i == haveSent.constEnd()) { // no invoke after or such msg was not sent or was completed recently
+		to->resize(size + fulllen + skipBeforeRequest);
+		if (skipBeforeRequest) {
+			memcpy(to->data() + size, from->constData() + 4, headlen * sizeof(mtpPrime));
+			memcpy(to->data() + size + headlen + skipBeforeRequest, from->constData() + 4 + headlen, lenInInts * sizeof(mtpPrime));
+		} else {
+			memcpy(to->data() + size, from->constData() + 4, fulllen * sizeof(mtpPrime));
+		}
+	} else {
+		to->resize(size + fulllen + skipBeforeRequest + 3);
+		memcpy(to->data() + size, from->constData() + 4, headlen * sizeof(mtpPrime));
+		(*to)[size + 3] += 3 * sizeof(mtpPrime);
+		*((mtpTypeId*)&((*to)[size + headlen + skipBeforeRequest])) = mtpc_invokeAfterMsg;
+		memcpy(to->data() + size + headlen + skipBeforeRequest + 1, &afterId, 2 * sizeof(mtpPrime));
+		memcpy(to->data() + size + headlen + skipBeforeRequest + 3, from->constData() + 4 + headlen, lenInInts * sizeof(mtpPrime));
+		if (size + 3 != 7) (*to)[7] += 3 * sizeof(mtpPrime);
+	}
+}
+
 bool parsePQ(const string &pqStr, string &pStr, string &qStr) {
 	if (pqStr.length() > 8) return false; // more than 64 bit pq
 
@@ -321,35 +343,20 @@ RSAPublicKeys InitRSAPublicKeys() {
 
 } // namespace
 
-uint32 ThreadIdIncrement = 0;
-
-Thread::Thread() : QThread(nullptr)
-, _threadId(++ThreadIdIncrement) {
-}
-
-uint32 Thread::getThreadId() const {
-	return _threadId;
-}
-
-Thread::~Thread() {
-}
-
-Connection::Connection() : thread(nullptr), data(nullptr) {
+Connection::Connection(Instance *instance) : _instance(instance) {
 }
 
 int32 Connection::prepare(SessionData *sessionData, int32 dc) {
 	t_assert(thread == nullptr && data == nullptr);
 
-	thread = new Thread();
-	data = new ConnectionPrivate(thread, this, sessionData, dc);
-
-	dc = data->getDC();
-	if (!dc) {
-		delete data;
-		data = nullptr;
-		delete thread;
-		thread = nullptr;
-		return 0;
+	thread = std::make_unique<Thread>();
+	auto newData = std::make_unique<ConnectionPrivate>(_instance, thread.get(), this, sessionData, dc);
+	dc = newData->getDC();
+	if (dc) {
+		// will be deleted in the thread::finished signal
+		data = newData.release();
+	} else {
+		thread.reset();
 	}
 	return dc;
 }
@@ -361,9 +368,8 @@ void Connection::start() {
 void Connection::kill() {
 	t_assert(data != nullptr && thread != nullptr);
 	data->stop();
-	data = nullptr; // will be deleted in thread::finished signal
+	data = nullptr;
 	thread->quit();
-	queueQuittingConnection(this);
 }
 
 void Connection::waitTillFinish() {
@@ -371,8 +377,7 @@ void Connection::waitTillFinish() {
 
 	DEBUG_LOG(("Waiting for connectionThread to finish"));
 	thread->wait();
-	delete thread;
-	thread = nullptr;
+	thread.reset();
 }
 
 int32 Connection::state() const {
@@ -388,7 +393,10 @@ QString Connection::transport() const {
 }
 
 Connection::~Connection() {
-	t_assert(data == nullptr && thread == nullptr);
+	t_assert(data == nullptr);
+	if (thread) {
+		waitTillFinish();
+	}
 }
 
 void ConnectionPrivate::createConn(bool createIPv4, bool createIPv6) {
@@ -440,7 +448,8 @@ void ConnectionPrivate::destroyConn(AbstractConnection **conn) {
 	}
 }
 
-ConnectionPrivate::ConnectionPrivate(QThread *thread, Connection *owner, SessionData *data, uint32 _dc) : QObject(nullptr)
+ConnectionPrivate::ConnectionPrivate(Instance *instance, QThread *thread, Connection *owner, SessionData *data, uint32 _dc) : QObject()
+, _instance(instance)
 , _state(DisconnectedState)
 , dc(_dc)
 , _owner(owner)
@@ -463,7 +472,7 @@ ConnectionPrivate::ConnectionPrivate(QThread *thread, Connection *owner, Session
 
 	connect(thread, SIGNAL(started()), this, SLOT(socketStart()));
 	connect(thread, SIGNAL(finished()), this, SLOT(doFinish()));
-	connect(this, SIGNAL(finished(Connection*)), globalSlotCarrier(), SLOT(connectionFinished(Connection*)), Qt::QueuedConnection);
+	connect(this, SIGNAL(finished(internal::Connection*)), _instance, SLOT(connectionFinished(internal::Connection*)), Qt::QueuedConnection);
 
 	connect(&retryTimer, SIGNAL(timeout()), this, SLOT(retryByTimer()));
 	connect(&_waitForConnectedTimer, SIGNAL(timeout()), this, SLOT(onWaitConnectedFailed()));
@@ -1104,8 +1113,8 @@ void ConnectionPrivate::socketStart(bool afterConfig) {
 		}
 		if (noIPv4) DEBUG_LOG(("MTP Info: DC %1 options for IPv4 over HTTP not found, waiting for config").arg(dc));
 		if (Global::TryIPv6() && noIPv6) DEBUG_LOG(("MTP Info: DC %1 options for IPv6 over HTTP not found, waiting for config").arg(dc));
-		connect(configLoader(), SIGNAL(loaded()), this, SLOT(onConfigLoaded()));
-		configLoader()->load();
+		connect(_instance, SIGNAL(configLoaded()), this, SLOT(onConfigLoaded()), Qt::UniqueConnection);
+		QMetaObject::invokeMethod(_instance, "configLoadRequest", Qt::QueuedConnection);
 		return;
 	}
 
@@ -1635,7 +1644,7 @@ ConnectionPrivate::HandleResult ConnectionPrivate::handleOneReceived(const mtpPr
 			mtpRequestId requestId = wasSent(resendId);
 			if (requestId) {
 				LOG(("Message Error: bad message notification received, msgId %1, error_code %2, fatal: clearing callbacks").arg(data.vbad_msg_id.v).arg(errorCode));
-				clearCallbacksDelayed(RPCCallbackClears(1, RPCCallbackClear(requestId, -errorCode)));
+				_instance->clearCallbacksDelayed(RPCCallbackClears(1, RPCCallbackClear(requestId, -errorCode)));
 			} else {
 				DEBUG_LOG(("Message Error: such message was not sent recently %1").arg(resendId));
 			}
@@ -2101,7 +2110,7 @@ void ConnectionPrivate::requestsAcked(const QVector<MTPlong> &ids, bool byRespon
 						mtpRequestId reqId = req.value()->requestId;
 						bool moveToAcked = byResponse;
 						if (!moveToAcked) { // ignore ACK, if we need a response (if we have a handler)
-							moveToAcked = !hasCallbacks(reqId);
+							moveToAcked = !_instance->hasCallbacks(reqId);
 						}
 						if (moveToAcked) {
 							wereAcked.insert(msgId, reqId);
@@ -2119,7 +2128,7 @@ void ConnectionPrivate::requestsAcked(const QVector<MTPlong> &ids, bool byRespon
 						mtpRequestId reqId = reqIt.value();
 						bool moveToAcked = byResponse;
 						if (!moveToAcked) { // ignore ACK, if we need a response (if we have a handler)
-							moveToAcked = !hasCallbacks(reqId);
+							moveToAcked = !_instance->hasCallbacks(reqId);
 						}
 						if (moveToAcked) {
 							QWriteLocker locker4(sessionData->toSendMutex());
@@ -2160,7 +2169,7 @@ void ConnectionPrivate::requestsAcked(const QVector<MTPlong> &ids, bool byRespon
 	}
 
 	if (clearedAcked.size()) {
-		clearCallbacksDelayed(clearedAcked);
+		_instance->clearCallbacksDelayed(clearedAcked);
 	}
 
 	if (toAckMore.size()) {
@@ -2681,8 +2690,8 @@ void ConnectionPrivate::dhClientParamsAnswered() {
 
 		DEBUG_LOG(("AuthKey Info: auth key gen succeed, id: %1, server salt: %2").arg(authKey->keyId()).arg(serverSalt));
 
-		sessionData->owner()->notifyKeyCreated(authKey); // slot will call authKeyCreated()
-		sessionData->clear();
+		sessionData->owner()->notifyKeyCreated(std::move(authKey)); // slot will call authKeyCreated()
+		sessionData->clear(_instance);
 		unlockKey();
 	} return;
 

Telegram/SourceFiles/mtproto/connection.h

@@ -25,6 +25,9 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "core/single_timer.h"
 
 namespace MTP {
+
+class Instance;
+
 namespace internal {
 
 class AbstractConnection;
@@ -35,24 +38,27 @@ class Thread : public QThread {
 	Q_OBJECT
 
 public:
-	Thread();
-	uint32 getThreadId() const;
-	~Thread();
+	Thread() {
+		static int ThreadCounter = 0;
+		_threadIndex = ++ThreadCounter;
+	}
+	int getThreadIndex() const {
+		return _threadIndex;
+	}
 
 private:
-	uint32 _threadId;
+	int _threadIndex = 0;
 
 };
 
 class Connection {
 public:
-
 	enum ConnectionType {
 		TcpConnection,
 		HttpConnection
 	};
 
-	Connection();
+	Connection(Instance *instance);
 
 	int32 prepare(SessionData *data, int32 dc = 0); // return dc
 	void start();
@@ -67,9 +73,9 @@ public:
 	QString transport() const;
 
 private:
-
-	QThread *thread;
-	ConnectionPrivate *data;
+	Instance *_instance = nullptr;
+	std::unique_ptr<QThread> thread;
+	ConnectionPrivate *data = nullptr;
 
 };
 
@@ -77,7 +83,7 @@ class ConnectionPrivate : public QObject {
 	Q_OBJECT
 
 public:
-	ConnectionPrivate(QThread *thread, Connection *owner, SessionData *data, uint32 dc);
+	ConnectionPrivate(Instance *instance, QThread *thread, Connection *owner, SessionData *data, uint32 dc);
 	~ConnectionPrivate();
 
 	void stop();
@@ -102,10 +108,9 @@ signals:
 	void resendManyAsync(QVector<quint64> msgIds, qint64 msCanWait, bool forceContainer, bool sendMsgStateInfo);
 	void resendAllAsync();
 
-	void finished(Connection *connection);
+	void finished(internal::Connection *connection);
 
 public slots:
-
 	void retryByTimer();
 	void restartNow();
 	void restart(bool mayBeBadKey = false);
@@ -149,7 +154,6 @@ public slots:
 	void onConfigLoaded();
 
 private:
-
 	void doDisconnect();
 
 	void createConn(bool createIPv4, bool createIPv6);
@@ -175,8 +179,11 @@ private:
 	void clearMessages();
 
 	bool setState(int32 state, int32 ifState = Connection::UpdateAlways);
+
+	Instance *_instance = nullptr;
+
 	mutable QReadWriteLock stateConnMutex;
-	int32 _state;
+	int32 _state = DisconnectedState;
 
 	bool _needSessionReset = false;
 	void resetSession();

Telegram/SourceFiles/mtproto/dc_options.cpp

@@ -200,6 +200,7 @@ void DcOptions::constructFromSerialized(const QByteArray &serialized) {
 		return;
 	}
 	QDataStream stream(&buffer);
+	stream.setVersion(QDataStream::Qt_5_1);
 	qint32 count = 0;
 	stream >> count;
 	if (stream.status() != QDataStream::Ok) {
@@ -243,10 +244,6 @@ DcId DcOptions::getDefaultDcId() const {
 	auto result = sortedDcIds();
 	t_assert(!result.empty());
 
-	auto main = internal::mainDC();
-	if (base::contains(result, main)) {
-		return main;
-	}
 	return result[0];
 }
 

Telegram/SourceFiles/mtproto/dcenter.cpp

@@ -23,82 +23,22 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 
 #include "mtproto/facade.h"
 #include "mtproto/dc_options.h"
-#include "messenger.h"
+#include "mtproto/mtp_instance.h"
 #include "localstorage.h"
 
 namespace MTP {
 namespace internal {
 namespace {
 
-DcenterMap gDCs;
-bool configLoadedOnce = false;
-bool mainDCChanged = false;
-int32 _mainDC = 2;
-
-typedef QMap<int32, AuthKeyPtr> _KeysMapForWrite;
-_KeysMapForWrite _keysMapForWrite;
-QMutex _keysMapForWriteMutex;
-
 constexpr auto kEnumerateDcTimeout = 8000; // 8 seconds timeout for help_getConfig to work (then move to other dc)
 
 } // namespace
 
-DcenterMap &DCMap() {
-	return gDCs;
-}
-
-bool configNeeded() {
-	return !configLoadedOnce;
-}
-
-int32 mainDC() {
-	return _mainDC;
-}
-
-namespace {
-	QMap<int32, mtpRequestId> logoutGuestMap; // dcWithShift to logout request id
-	bool logoutDone(mtpRequestId req) {
-		for (QMap<int32, mtpRequestId>::iterator i = logoutGuestMap.begin(); i != logoutGuestMap.end(); ++i) {
-			if (i.value() == req) {
-				MTP::killSession(i.key());
-				logoutGuestMap.erase(i);
-				return true;
-			}
-		}
-		return false;
-	}
-}
-
-void logoutOtherDCs() {
-	QList<int32> dcs;
-	{
-		QMutexLocker lock(&_keysMapForWriteMutex);
-		dcs = _keysMapForWrite.keys();
-	}
-	for (int32 i = 0, cnt = dcs.size(); i != cnt; ++i) {
-		if (dcs[i] != MTP::maindc()) {
-			logoutGuestMap.insert(MTP::lgtDcId(dcs[i]), MTP::send(MTPauth_LogOut(), rpcDone(&logoutDone), rpcFail(&logoutDone), MTP::lgtDcId(dcs[i])));
-		}
-	}
-}
-
-void setDC(int32 dc, bool firstOnly) {
-	if (!dc || (firstOnly && mainDCChanged)) return;
-	mainDCChanged = true;
-	if (dc != _mainDC) {
-		_mainDC = dc;
-	}
-}
-
-Dcenter::Dcenter(int32 id, const AuthKeyPtr &key) : _id(id), _key(key), _connectionInited(false) {
+Dcenter::Dcenter(Instance *instance, DcId dcId, AuthKeyPtr &&key)
+: _instance(instance)
+, _id(dcId)
+, _key(std::move(key)) {
 	connect(this, SIGNAL(authKeyCreated()), this, SLOT(authKeyWrite()), Qt::QueuedConnection);
-
-	QMutexLocker lock(&_keysMapForWriteMutex);
-	if (_key) {
-		_keysMapForWrite[_id] = _key;
-	} else {
-		_keysMapForWrite.remove(_id);
-	}
 }
 
 void Dcenter::authKeyWrite() {
@@ -108,18 +48,13 @@ void Dcenter::authKeyWrite() {
 	}
 }
 
-void Dcenter::setKey(const AuthKeyPtr &key) {
+void Dcenter::setKey(AuthKeyPtr &&key) {
 	DEBUG_LOG(("AuthKey Info: MTProtoDC::setKey(%1), emitting authKeyCreated, dc %2").arg(key ? key->keyId() : 0).arg(_id));
-	_key = key;
+	_key = std::move(key);
 	_connectionInited = false;
 	emit authKeyCreated();
 
-	QMutexLocker lock(&_keysMapForWriteMutex);
-	if (_key) {
-		_keysMapForWrite[_id] = _key;
-	} else {
-		_keysMapForWrite.remove(_id);
-	}
+	_instance->setKeyForWrite(_id, _key);
 }
 
 QReadWriteLock *Dcenter::keyMutex() const {
@@ -132,99 +67,45 @@ const AuthKeyPtr &Dcenter::getKey() const {
 
 void Dcenter::destroyKey() {
 	setKey(AuthKeyPtr());
-
-	QMutexLocker lock(&_keysMapForWriteMutex);
-	_keysMapForWrite.remove(_id);
 }
 
-namespace {
-
-ConfigLoader *_configLoader = nullptr;
-auto loadingConfig = false;
-
-void configLoaded(const MTPConfig &result) {
-	loadingConfig = false;
-
-	auto &data = result.c_config();
-
-	DEBUG_LOG(("MTP Info: got config, chat_size_max: %1, date: %2, test_mode: %3, this_dc: %4, dc_options.length: %5").arg(data.vchat_size_max.v).arg(data.vdate.v).arg(mtpIsTrue(data.vtest_mode)).arg(data.vthis_dc.v).arg(data.vdc_options.c_vector().v.size()));
-
-	if (data.vdc_options.c_vector().v.empty()) {
-		LOG(("MTP Error: config with empty dc_options received!"));
-	} else {
-		Messenger::Instance().dcOptions()->setFromList(data.vdc_options);
-	}
-
-	Global::SetChatSizeMax(data.vchat_size_max.v);
-	Global::SetMegagroupSizeMax(data.vmegagroup_size_max.v);
-	Global::SetForwardedCountMax(data.vforwarded_count_max.v);
-	Global::SetOnlineUpdatePeriod(data.vonline_update_period_ms.v);
-	Global::SetOfflineBlurTimeout(data.voffline_blur_timeout_ms.v);
-	Global::SetOfflineIdleTimeout(data.voffline_idle_timeout_ms.v);
-	Global::SetOnlineCloudTimeout(data.vonline_cloud_timeout_ms.v);
-	Global::SetNotifyCloudDelay(data.vnotify_cloud_delay_ms.v);
-	Global::SetNotifyDefaultDelay(data.vnotify_default_delay_ms.v);
-	Global::SetChatBigSize(data.vchat_big_size.v); // ?
-	Global::SetPushChatPeriod(data.vpush_chat_period_ms.v); // ?
-	Global::SetPushChatLimit(data.vpush_chat_limit.v); // ?
-	Global::SetSavedGifsLimit(data.vsaved_gifs_limit.v);
-	Global::SetEditTimeLimit(data.vedit_time_limit.v); // ?
-	Global::SetStickersRecentLimit(data.vstickers_recent_limit.v);
-	Global::SetPinnedDialogsCountMax(data.vpinned_dialogs_count_max.v);
-
-	configLoadedOnce = true;
-	Local::writeSettings();
-
-	configLoader()->done();
-}
-
-bool configFailed(const RPCError &error) {
-	if (MTP::isDefaultHandledError(error)) return false;
-
-	loadingConfig = false;
-	LOG(("MTP Error: failed to get config!"));
-	return false;
-}
-
-};
-
-ConfigLoader::ConfigLoader() {
+ConfigLoader::ConfigLoader(Instance *instance, RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail) : _instance(instance)
+, _doneHandler(onDone)
+, _failHandler(onFail) {
 	connect(&_enumDCTimer, SIGNAL(timeout()), this, SLOT(enumDC()));
 }
 
 void ConfigLoader::load() {
-	if (loadingConfig) return;
-	loadingConfig = true;
-
-	MTP::send(MTPhelp_GetConfig(), rpcDone(configLoaded), rpcFail(configFailed));
+	sendRequest(_instance->mainDcId());
 
 	_enumDCTimer.start(kEnumerateDcTimeout);
 }
 
-void ConfigLoader::done() {
+mtpRequestId ConfigLoader::sendRequest(ShiftedDcId shiftedDcId) {
+	return _instance->send(MTPhelp_GetConfig(), _doneHandler, _failHandler, shiftedDcId);
+}
+
+ConfigLoader::~ConfigLoader() {
 	_enumDCTimer.stop();
 	if (_enumRequest) {
-		MTP::cancel(_enumRequest);
-		_enumRequest = 0;
+		_instance->cancel(_enumRequest);
 	}
 	if (_enumCurrent) {
-		MTP::killSession(MTP::cfgDcId(_enumCurrent));
-		_enumCurrent = 0;
+		_instance->killSession(MTP::cfgDcId(_enumCurrent));
 	}
-	emit loaded();
 }
 
 void ConfigLoader::enumDC() {
-	if (!loadingConfig) return;
-
-	if (_enumRequest) MTP::cancel(_enumRequest);
+	if (_enumRequest) {
+		_instance->cancel(_enumRequest);
+	}
 
 	if (!_enumCurrent) {
-		_enumCurrent = _mainDC;
+		_enumCurrent = _instance->mainDcId();
 	} else {
-		MTP::killSession(MTP::cfgDcId(_enumCurrent));
+		_instance->killSession(MTP::cfgDcId(_enumCurrent));
 	}
-	auto ids = Messenger::Instance().dcOptions()->sortedDcIds();
+	auto ids = _instance->dcOptions()->sortedDcIds();
 	t_assert(!ids.empty());
 
 	auto i = std::find(ids.cbegin(), ids.cend(), _enumCurrent);
@@ -233,34 +114,10 @@ void ConfigLoader::enumDC() {
 	} else {
 		_enumCurrent = *i;
 	}
-	_enumRequest = MTP::send(MTPhelp_GetConfig(), rpcDone(configLoaded), rpcFail(configFailed), MTP::cfgDcId(_enumCurrent));
+	_enumRequest = sendRequest(MTP::cfgDcId(_enumCurrent));
 
 	_enumDCTimer.start(kEnumerateDcTimeout);
 }
 
-ConfigLoader *configLoader() {
-	if (!_configLoader) _configLoader = new ConfigLoader();
-	return _configLoader;
-}
-
-void destroyConfigLoader() {
-	delete _configLoader;
-	_configLoader = nullptr;
-}
-
-AuthKeysMap getAuthKeys() {
-	AuthKeysMap result;
-	QMutexLocker lock(&_keysMapForWriteMutex);
-	for_const (const AuthKeyPtr &key, _keysMapForWrite) {
-		result.push_back(key);
-	}
-	return result;
-}
-
-void setAuthKey(int32 dcId, AuthKeyPtr key) {
-	DcenterPtr dc(new Dcenter(dcId, key));
-	gDCs.insert(dcId, dc);
-}
-
 } // namespace internal
 } // namespace MTP

Telegram/SourceFiles/mtproto/dcenter.h

@@ -21,19 +21,24 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #pragma once
 
 #include "core/single_timer.h"
+#include "mtproto/rpc_sender.h"
+#include "mtproto/auth_key.h"
 
 namespace MTP {
+
+class Instance;
+
 namespace internal {
 
 class Dcenter : public QObject {
 	Q_OBJECT
 
 public:
-	Dcenter(int32 id, const AuthKeyPtr &key);
+	Dcenter(Instance *instance, DcId dcId, AuthKeyPtr &&key);
 
 	QReadWriteLock *keyMutex() const;
 	const AuthKeyPtr &getKey() const;
-	void setKey(const AuthKeyPtr &key);
+	void setKey(AuthKeyPtr &&key);
 	void destroyKey();
 
 	bool connectionInited() const {
@@ -56,47 +61,40 @@ private slots:
 private:
 	mutable QReadWriteLock keyLock;
 	mutable QMutex initLock;
-	int32 _id;
+	Instance *_instance = nullptr;
+	DcId _id = 0;
 	AuthKeyPtr _key;
-	bool _connectionInited;
+	bool _connectionInited = false;
 
 };
 
-typedef QSharedPointer<Dcenter> DcenterPtr;
-typedef QMap<uint32, DcenterPtr> DcenterMap;
+using DcenterPtr = std::shared_ptr<Dcenter>;
+using DcenterMap = std::map<DcId, DcenterPtr>;
 
 class ConfigLoader : public QObject {
 	Q_OBJECT
 
 public:
-	ConfigLoader();
+	ConfigLoader(Instance *instance, RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail);
+	~ConfigLoader();
+
 	void load();
-	void done();
 
 public slots:
 	void enumDC();
 
-signals:
-	void loaded();
-
 private:
+	mtpRequestId sendRequest(ShiftedDcId shiftedDcId);
+
+	Instance *_instance = nullptr;
 	SingleTimer _enumDCTimer;
 	DcId _enumCurrent = 0;
 	mtpRequestId _enumRequest = 0;
 
+	RPCDoneHandlerPtr _doneHandler;
+	RPCFailHandlerPtr _failHandler;
+
 };
 
-ConfigLoader *configLoader();
-void destroyConfigLoader();
-
-DcenterMap &DCMap();
-bool configNeeded();
-int32 mainDC();
-void logoutOtherDCs();
-void setDC(int32 dc, bool firstOnly = false);
-
-AuthKeysMap getAuthKeys();
-void setAuthKey(int32 dc, AuthKeyPtr key);
-
 } // namespace internal
 } // namespace MTP

Telegram/SourceFiles/mtproto/facade.cpp

@@ -22,366 +22,16 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "mtproto/facade.h"
 
 #include "localstorage.h"
-#include "auth_session.h"
+#include "messenger.h"
 
 namespace MTP {
-
+namespace internal {
 namespace {
 
-	typedef QMap<int32, internal::Session*> Sessions;
-	Sessions sessions;
-	internal::Session *mainSession;
-
-	typedef QMap<mtpRequestId, int32> RequestsByDC; // holds dcWithShift for request to this dc or -dc for request to main dc
-	RequestsByDC requestsByDC;
-	QMutex requestByDCLock;
-
-	typedef QMap<mtpRequestId, int32> AuthExportRequests; // holds target dcWithShift for auth export request
-	AuthExportRequests authExportRequests;
-
-	bool _started = false;
-
-	uint32 layer;
-
-	typedef QMap<mtpRequestId, RPCResponseHandler> ParserMap;
-	ParserMap parserMap;
-	QMutex parserMapLock;
-
-	typedef QMap<mtpRequestId, mtpRequest> RequestMap;
-	RequestMap requestMap;
-	QReadWriteLock requestMapLock;
-
-	typedef QPair<mtpRequestId, TimeMs> DelayedRequest;
-	typedef QList<DelayedRequest> DelayedRequestsList;
-	DelayedRequestsList delayedRequests;
-
-	typedef QMap<mtpRequestId, int32> RequestsDelays;
-	RequestsDelays requestsDelays;
-
-	typedef QSet<mtpRequestId> BadGuestDCRequests;
-	BadGuestDCRequests badGuestDCRequests;
-
-	typedef QVector<mtpRequestId> DCAuthWaiters;
-	typedef QMap<int32, DCAuthWaiters> AuthWaiters; // holds request ids waiting for auth import to specific dc
-	AuthWaiters authWaiters;
-
-	typedef OrderedSet<internal::Connection*> MTPQuittingConnections;
-	MTPQuittingConnections quittingConnections;
-
-	QMutex toClearLock;
-	RPCCallbackClears toClear;
-
-	RPCResponseHandler globalHandler;
-	MTPStateChangedHandler stateChangedHandler = 0;
-	MTPSessionResetHandler sessionResetHandler = 0;
-	internal::GlobalSlotCarrier *_globalSlotCarrier = 0;
-
-	bool hasAuthorization() {
-		return (AuthSession::Current() != nullptr);
-	}
-
-	void importDone(const MTPauth_Authorization &result, mtpRequestId req) {
-		QMutexLocker locker1(&requestByDCLock);
-
-		RequestsByDC::iterator i = requestsByDC.find(req);
-		if (i == requestsByDC.end()) {
-			LOG(("MTP Error: auth import request not found in requestsByDC, requestId: %1").arg(req));
-			RPCError error(internal::rpcClientError("AUTH_IMPORT_FAIL", QString("did not find import request in requestsByDC, request %1").arg(req)));
-			if (globalHandler.onFail && hasAuthorization()) (*globalHandler.onFail)(req, error); // auth failed in main dc
-			return;
-		}
-		DcId newdc = bareDcId(i.value());
-
-		DEBUG_LOG(("MTP Info: auth import to dc %1 succeeded").arg(newdc));
-
-		DCAuthWaiters &waiters(authWaiters[newdc]);
-		if (waiters.size()) {
-			QReadLocker locker(&requestMapLock);
-			for (DCAuthWaiters::iterator i = waiters.begin(), e = waiters.end(); i != e; ++i) {
-				mtpRequestId requestId = *i;
-				RequestMap::const_iterator j = requestMap.constFind(requestId);
-				if (j == requestMap.cend()) {
-					LOG(("MTP Error: could not find request %1 for resending").arg(requestId));
-					continue;
-				}
-				ShiftedDcId dcWithShift = newdc;
-				{
-					RequestsByDC::iterator k = requestsByDC.find(requestId);
-					if (k == requestsByDC.cend()) {
-						LOG(("MTP Error: could not find request %1 by dc for resending").arg(requestId));
-						continue;
-					}
-					if (k.value() < 0) {
-						setdc(newdc);
-						k.value() = -newdc;
-					} else {
-						dcWithShift = shiftDcId(newdc, getDcIdShift(k.value()));
-						k.value() = dcWithShift;
-					}
-					DEBUG_LOG(("MTP Info: resending request %1 to dc %2 after import auth").arg(requestId).arg(k.value()));
-				}
-				if (internal::Session *session = internal::getSession(dcWithShift)) {
-					session->sendPrepared(j.value());
-				}
-			}
-			waiters.clear();
-		}
-	}
-
-	bool importFail(const RPCError &error, mtpRequestId req) {
-		if (isDefaultHandledError(error)) return false;
-
-		if (globalHandler.onFail && hasAuthorization()) (*globalHandler.onFail)(req, error); // auth import failed
-		return true;
-	}
-
-	void exportDone(const MTPauth_ExportedAuthorization &result, mtpRequestId req) {
-		AuthExportRequests::const_iterator i = authExportRequests.constFind(req);
-		if (i == authExportRequests.cend()) {
-			LOG(("MTP Error: auth export request target dcWithShift not found, requestId: %1").arg(req));
-			RPCError error(internal::rpcClientError("AUTH_IMPORT_FAIL", QString("did not find target dcWithShift, request %1").arg(req)));
-			if (globalHandler.onFail && hasAuthorization()) (*globalHandler.onFail)(req, error); // auth failed in main dc
-			return;
-		}
-
-		const auto &data(result.c_auth_exportedAuthorization());
-		send(MTPauth_ImportAuthorization(data.vid, data.vbytes), rpcDone(importDone), rpcFail(importFail), i.value());
-		authExportRequests.remove(req);
-	}
-
-	bool exportFail(const RPCError &error, mtpRequestId req) {
-		if (isDefaultHandledError(error)) return false;
-
-		AuthExportRequests::const_iterator i = authExportRequests.constFind(req);
-		if (i != authExportRequests.cend()) {
-			authWaiters[bareDcId(i.value())].clear();
-		}
-		if (globalHandler.onFail && hasAuthorization()) (*globalHandler.onFail)(req, error); // auth failed in main dc
-		return true;
-	}
-
-	bool onErrorDefault(mtpRequestId requestId, const RPCError &error) {
-		const QString &err(error.type());
-		int32 code = error.code();
-		if (!isFloodError(error) && err != qstr("AUTH_KEY_UNREGISTERED")) {
-			int breakpoint = 0;
-		}
-		bool badGuestDC = (code == 400) && (err == qsl("FILE_ID_INVALID"));
-        QRegularExpressionMatch m;
-		if ((m = QRegularExpression("^(FILE|PHONE|NETWORK|USER)_MIGRATE_(\\d+)$").match(err)).hasMatch()) {
-			if (!requestId) return false;
-
-			ShiftedDcId dcWithShift = 0, newdcWithShift = m.captured(2).toInt();
-			{
-				QMutexLocker locker(&requestByDCLock);
-				RequestsByDC::iterator i = requestsByDC.find(requestId);
-				if (i == requestsByDC.end()) {
-					LOG(("MTP Error: could not find request %1 for migrating to %2").arg(requestId).arg(newdcWithShift));
-				} else {
-					dcWithShift = i.value();
-				}
-			}
-			if (!dcWithShift || !newdcWithShift) return false;
-
-			DEBUG_LOG(("MTP Info: changing request %1 from dcWithShift%2 to dc%3").arg(requestId).arg(dcWithShift).arg(newdcWithShift));
-			if (dcWithShift < 0) { // newdc shift = 0
-				if (false && hasAuthorization() && !authExportRequests.contains(requestId)) { // migrate not supported at this moment
-					DEBUG_LOG(("MTP Info: importing auth to dc %1").arg(newdcWithShift));
-					DCAuthWaiters &waiters(authWaiters[newdcWithShift]);
-					if (!waiters.size()) {
-						authExportRequests.insert(send(MTPauth_ExportAuthorization(MTP_int(newdcWithShift)), rpcDone(exportDone), rpcFail(exportFail)), newdcWithShift);
-					}
-					waiters.push_back(requestId);
-					return true;
-				} else {
-					MTP::setdc(newdcWithShift);
-				}
-			} else {
-				newdcWithShift = shiftDcId(newdcWithShift, getDcIdShift(dcWithShift));
-			}
-
-			mtpRequest req;
-			{
-				QReadLocker locker(&requestMapLock);
-				RequestMap::const_iterator i = requestMap.constFind(requestId);
-				if (i == requestMap.cend()) {
-					LOG(("MTP Error: could not find request %1").arg(requestId));
-					return false;
-				}
-				req = i.value();
-			}
-			if (auto session = internal::getSession(newdcWithShift)) {
-				internal::registerRequest(requestId, (dcWithShift < 0) ? -newdcWithShift : newdcWithShift);
-				session->sendPrepared(req);
-			}
-			return true;
-		} else if (code < 0 || code >= 500 || (m = QRegularExpression("^FLOOD_WAIT_(\\d+)$").match(err)).hasMatch()) {
-			if (!requestId) return false;
-
-			int32 secs = 1;
-			if (code < 0 || code >= 500) {
-				RequestsDelays::iterator i = requestsDelays.find(requestId);
-				if (i != requestsDelays.cend()) {
-					secs = (i.value() > 60) ? i.value() : (i.value() *= 2);
-				} else {
-					requestsDelays.insert(requestId, secs);
-				}
-			} else {
-				secs = m.captured(1).toInt();
-//				if (secs >= 60) return false;
-			}
-			auto sendAt = getms(true) + secs * 1000 + 10;
-			DelayedRequestsList::iterator i = delayedRequests.begin(), e = delayedRequests.end();
-			for (; i != e; ++i) {
-				if (i->first == requestId) return true;
-				if (i->second > sendAt) break;
-			}
-			delayedRequests.insert(i, DelayedRequest(requestId, sendAt));
-
-			if (_globalSlotCarrier) _globalSlotCarrier->checkDelayed();
-
-			return true;
-		} else if (code == 401 || (badGuestDC && badGuestDCRequests.constFind(requestId) == badGuestDCRequests.cend())) {
-			int32 dcWithShift = 0;
-			{
-				QMutexLocker locker(&requestByDCLock);
-				RequestsByDC::iterator i = requestsByDC.find(requestId);
-				if (i != requestsByDC.end()) {
-					dcWithShift = i.value();
-				} else {
-					LOG(("MTP Error: unauthorized request without dc info, requestId %1").arg(requestId));
-				}
-			}
-			int32 newdc = bareDcId(qAbs(dcWithShift));
-			if (!newdc || newdc == internal::mainDC() || !hasAuthorization()) {
-				if (!badGuestDC && globalHandler.onFail) (*globalHandler.onFail)(requestId, error); // auth failed in main dc
-				return false;
-			}
-
-			DEBUG_LOG(("MTP Info: importing auth to dcWithShift %1").arg(dcWithShift));
-			DCAuthWaiters &waiters(authWaiters[newdc]);
-			if (!waiters.size()) {
-				authExportRequests.insert(send(MTPauth_ExportAuthorization(MTP_int(newdc)), rpcDone(exportDone), rpcFail(exportFail)), abs(dcWithShift));
-			}
-			waiters.push_back(requestId);
-			if (badGuestDC) badGuestDCRequests.insert(requestId);
-			return true;
-		} else if (err == qstr("CONNECTION_NOT_INITED") || err == qstr("CONNECTION_LAYER_INVALID")) {
-			mtpRequest req;
-			{
-				QReadLocker locker(&requestMapLock);
-				RequestMap::const_iterator i = requestMap.constFind(requestId);
-				if (i == requestMap.cend()) {
-					LOG(("MTP Error: could not find request %1").arg(requestId));
-					return false;
-				}
-				req = i.value();
-			}
-			int32 dcWithShift = 0;
-			{
-				QMutexLocker locker(&requestByDCLock);
-				RequestsByDC::iterator i = requestsByDC.find(requestId);
-				if (i == requestsByDC.end()) {
-					LOG(("MTP Error: could not find request %1 for resending with init connection").arg(requestId));
-				} else {
-					dcWithShift = i.value();
-				}
-			}
-			if (!dcWithShift) return false;
-
-			if (internal::Session *session = internal::getSession(qAbs(dcWithShift))) {
-				req->needsLayer = true;
-				session->sendPrepared(req);
-			}
-			return true;
-		} else if (err == qstr("MSG_WAIT_FAILED")) {
-			mtpRequest req;
-			{
-				QReadLocker locker(&requestMapLock);
-				RequestMap::const_iterator i = requestMap.constFind(requestId);
-				if (i == requestMap.cend()) {
-					LOG(("MTP Error: could not find request %1").arg(requestId));
-					return false;
-				}
-				req = i.value();
-			}
-			if (!req->after) {
-				LOG(("MTP Error: wait failed for not dependent request %1").arg(requestId));
-				return false;
-			}
-			int32 dcWithShift = 0;
-			{
-				QMutexLocker locker(&requestByDCLock);
-				RequestsByDC::iterator i = requestsByDC.find(requestId), j = requestsByDC.find(req->after->requestId);
-				if (i == requestsByDC.end()) {
-					LOG(("MTP Error: could not find request %1 by dc").arg(requestId));
-				} else if (j == requestsByDC.end()) {
-					LOG(("MTP Error: could not find dependent request %1 by dc").arg(req->after->requestId));
-				} else {
-					dcWithShift = i.value();
-					if (i.value() != j.value()) {
-						req->after = mtpRequest();
-					}
-				}
-			}
-			if (!dcWithShift) return false;
-
-			if (!req->after) {
-				if (internal::Session *session = internal::getSession(qAbs(dcWithShift))) {
-					req->needsLayer = true;
-					session->sendPrepared(req);
-				}
-			} else {
-				int32 newdc = bareDcId(qAbs(dcWithShift));
-				DCAuthWaiters &waiters(authWaiters[newdc]);
-				if (waiters.indexOf(req->after->requestId) >= 0) {
-					if (waiters.indexOf(requestId) < 0) {
-						waiters.push_back(requestId);
-					}
-					if (badGuestDCRequests.constFind(req->after->requestId) != badGuestDCRequests.cend()) {
-						if (badGuestDCRequests.constFind(requestId) == badGuestDCRequests.cend()) {
-							badGuestDCRequests.insert(requestId);
-						}
-					}
-				} else {
-					DelayedRequestsList::iterator i = delayedRequests.begin(), e = delayedRequests.end();
-					for (; i != e; ++i) {
-						if (i->first == requestId) return true;
-						if (i->first == req->after->requestId) break;
-					}
-					if (i != e) {
-						delayedRequests.insert(i, DelayedRequest(requestId, i->second));
-					}
-
-					if (_globalSlotCarrier) _globalSlotCarrier->checkDelayed();
-				}
-			}
-			return true;
-		}
-		if (badGuestDC) badGuestDCRequests.remove(requestId);
-		return false;
-	}
-
 int PauseLevel = 0;
 
 } // namespace
 
-namespace internal {
-
-Session *getSession(ShiftedDcId shiftedDcId) {
-	if (!_started) return nullptr;
-	if (!shiftedDcId) return mainSession;
-	if (!bareDcId(shiftedDcId)) {
-		shiftedDcId += bareDcId(mainSession->getDcWithShift());
-	}
-
-	Sessions::const_iterator i = sessions.constFind(shiftedDcId);
-	if (i == sessions.cend()) {
-		i = sessions.insert(shiftedDcId, new Session(shiftedDcId));
-	}
-	return i.value();
-}
-
 bool paused() {
 	return PauseLevel > 0;
 }
@@ -392,504 +42,17 @@ void pause() {
 
 void unpause() {
 	--PauseLevel;
-	if (_started) {
-		for_const (auto session, sessions) {
-			session->unpaused();
+	if (!PauseLevel) {
+		if (auto instance = MainInstance()) {
+			instance->unpaused();
 		}
 	}
 }
 
-void registerRequest(mtpRequestId requestId, int32 dcWithShift) {
-	{
-		QMutexLocker locker(&requestByDCLock);
-		requestsByDC.insert(requestId, dcWithShift);
-	}
-	internal::performDelayedClear(); // need to do it somewhere...
-}
-
-void unregisterRequest(mtpRequestId requestId) {
-	requestsDelays.remove(requestId);
-
-	{
-		QWriteLocker locker(&requestMapLock);
-		requestMap.remove(requestId);
-	}
-
-	QMutexLocker locker(&requestByDCLock);
-	requestsByDC.remove(requestId);
-}
-
-mtpRequestId storeRequest(mtpRequest &request, const RPCResponseHandler &parser) {
-	mtpRequestId res = reqid();
-	request->requestId = res;
-	if (parser.onDone || parser.onFail) {
-		QMutexLocker locker(&parserMapLock);
-		parserMap.insert(res, parser);
-	}
-	{
-		QWriteLocker locker(&requestMapLock);
-		requestMap.insert(res, request);
-	}
-	return res;
-}
-
-mtpRequest getRequest(mtpRequestId reqId) {
-	static mtpRequest zero;
-	mtpRequest req;
-	{
-		QReadLocker locker(&requestMapLock);
-		RequestMap::const_iterator i = requestMap.constFind(reqId);
-		req = (i == requestMap.cend()) ? zero : i.value();
-	}
-	return req;
-}
-
-void wrapInvokeAfter(mtpRequest &to, const mtpRequest &from, const mtpRequestMap &haveSent, int32 skipBeforeRequest) {
-	mtpMsgId afterId(*(mtpMsgId*)(from->after->data() + 4));
-	mtpRequestMap::const_iterator i = afterId ? haveSent.constFind(afterId) : haveSent.cend();
-	int32 size = to->size(), lenInInts = (from.innerLength() >> 2), headlen = 4, fulllen = headlen + lenInInts;
-	if (i == haveSent.constEnd()) { // no invoke after or such msg was not sent or was completed recently
-		to->resize(size + fulllen + skipBeforeRequest);
-		if (skipBeforeRequest) {
-			memcpy(to->data() + size, from->constData() + 4, headlen * sizeof(mtpPrime));
-			memcpy(to->data() + size + headlen + skipBeforeRequest, from->constData() + 4 + headlen, lenInInts * sizeof(mtpPrime));
-		} else {
-			memcpy(to->data() + size, from->constData() + 4, fulllen * sizeof(mtpPrime));
-		}
-	} else {
-		to->resize(size + fulllen + skipBeforeRequest + 3);
-		memcpy(to->data() + size, from->constData() + 4, headlen * sizeof(mtpPrime));
-		(*to)[size + 3] += 3 * sizeof(mtpPrime);
-		*((mtpTypeId*)&((*to)[size + headlen + skipBeforeRequest])) = mtpc_invokeAfterMsg;
-		memcpy(to->data() + size + headlen + skipBeforeRequest + 1, &afterId, 2 * sizeof(mtpPrime));
-		memcpy(to->data() + size + headlen + skipBeforeRequest + 3, from->constData() + 4 + headlen, lenInInts * sizeof(mtpPrime));
-		if (size + 3 != 7) (*to)[7] += 3 * sizeof(mtpPrime);
-	}
-}
-
-void clearCallbacks(mtpRequestId requestId, int32 errorCode) {
-	RPCResponseHandler h;
-	bool found = false;
-	{
-		QMutexLocker locker(&parserMapLock);
-		ParserMap::iterator i = parserMap.find(requestId);
-		if (i != parserMap.end()) {
-			h = i.value();
-			found = true;
-
-			parserMap.erase(i);
-		}
-	}
-	if (errorCode && found) {
-		rpcErrorOccured(requestId, h, rpcClientError("CLEAR_CALLBACK", QString("did not handle request %1, error code %2").arg(requestId).arg(errorCode)));
-	}
-}
-
-void clearCallbacksDelayed(const RPCCallbackClears &requestIds) {
-	uint32 idsCount = requestIds.size();
-	if (!idsCount) return;
-
-	if (cDebug()) {
-		QString idsStr = QString("%1").arg(requestIds[0].requestId);
-		for (uint32 i = 1; i < idsCount; ++i) {
-			idsStr += QString(", %1").arg(requestIds[i].requestId);
-		}
-		DEBUG_LOG(("RPC Info: clear callbacks delayed, msgIds: %1").arg(idsStr));
-	}
-
-	QMutexLocker lock(&toClearLock);
-	uint32 toClearNow = toClear.size();
-	if (toClearNow) {
-		toClear.resize(toClearNow + idsCount);
-		memcpy(toClear.data() + toClearNow, requestIds.constData(), idsCount * sizeof(RPCCallbackClear));
-	} else {
-		toClear = requestIds;
-	}
-}
-
-void performDelayedClear() {
-	QMutexLocker lock(&toClearLock);
-	if (!toClear.isEmpty()) {
-		for (RPCCallbackClears::iterator i = toClear.begin(), e = toClear.end(); i != e; ++i) {
-			if (cDebug()) {
-				QMutexLocker locker(&parserMapLock);
-				if (parserMap.find(i->requestId) != parserMap.end()) {
-					DEBUG_LOG(("RPC Info: clearing delayed callback %1, error code %2").arg(i->requestId).arg(i->errorCode));
-				}
-			}
-			clearCallbacks(i->requestId, i->errorCode);
-			internal::unregisterRequest(i->requestId);
-		}
-		toClear.clear();
-	}
-}
-
-void execCallback(mtpRequestId requestId, const mtpPrime *from, const mtpPrime *end) {
-	RPCResponseHandler h;
-	{
-		QMutexLocker locker(&parserMapLock);
-		ParserMap::iterator i = parserMap.find(requestId);
-		if (i != parserMap.cend()) {
-			h = i.value();
-			parserMap.erase(i);
-
-			DEBUG_LOG(("RPC Info: found parser for request %1, trying to parse response...").arg(requestId));
-		}
-	}
-	if (h.onDone || h.onFail) {
-		try {
-			if (from >= end) throw mtpErrorInsufficient();
-
-			if (*from == mtpc_rpc_error) {
-				RPCError err(MTPRpcError(from, end));
-				DEBUG_LOG(("RPC Info: error received, code %1, type %2, description: %3").arg(err.code()).arg(err.type()).arg(err.description()));
-				if (!rpcErrorOccured(requestId, h, err)) {
-					QMutexLocker locker(&parserMapLock);
-					parserMap.insert(requestId, h);
-					return;
-				}
-			} else {
-				if (h.onDone) {
-//						t_assert(App::app() != 0);
-					(*h.onDone)(requestId, from, end);
-				}
-			}
-		} catch (Exception &e) {
-			if (!rpcErrorOccured(requestId, h, rpcClientError("RESPONSE_PARSE_FAILED", QString("exception text: ") + e.what()))) {
-				QMutexLocker locker(&parserMapLock);
-				parserMap.insert(requestId, h);
-				return;
-			}
-		}
-	} else {
-		DEBUG_LOG(("RPC Info: parser not found for %1").arg(requestId));
-	}
-	unregisterRequest(requestId);
-}
-
-bool hasCallbacks(mtpRequestId requestId) {
-	QMutexLocker locker(&parserMapLock);
-	ParserMap::iterator i = parserMap.find(requestId);
-	return (i != parserMap.cend());
-}
-
-void globalCallback(const mtpPrime *from, const mtpPrime *end) {
-	if (globalHandler.onDone) (*globalHandler.onDone)(0, from, end); // some updates were received
-}
-
-void onStateChange(int32 dcWithShift, int32 state) {
-	if (stateChangedHandler) stateChangedHandler(dcWithShift, state);
-}
-
-void onSessionReset(int32 dcWithShift) {
-	if (sessionResetHandler) sessionResetHandler(dcWithShift);
-}
-
-bool rpcErrorOccured(mtpRequestId requestId, const RPCFailHandlerPtr &onFail, const RPCError &err) { // return true if need to clean request data
-	if (isDefaultHandledError(err)) {
-		if (onFail && (*onFail)(requestId, err)) return true;
-	}
-
-	if (onErrorDefault(requestId, err)) {
-		return false;
-	}
-	LOG(("RPC Error: request %1 got fail with code %2, error %3%4").arg(requestId).arg(err.code()).arg(err.type()).arg(err.description().isEmpty() ? QString() : QString(": %1").arg(err.description())));
-	onFail && (*onFail)(requestId, err);
-	return true;
-}
-
-GlobalSlotCarrier::GlobalSlotCarrier() {
-	connect(&_timer, SIGNAL(timeout()), this, SLOT(checkDelayed()));
-}
-
-void GlobalSlotCarrier::checkDelayed() {
-	auto now = getms(true);
-	while (!delayedRequests.isEmpty() && now >= delayedRequests.front().second) {
-		mtpRequestId requestId = delayedRequests.front().first;
-		delayedRequests.pop_front();
-
-		int32 dcWithShift = 0;
-		{
-			QMutexLocker locker(&requestByDCLock);
-			RequestsByDC::const_iterator i = requestsByDC.constFind(requestId);
-			if (i != requestsByDC.cend()) {
-				dcWithShift = i.value();
-			} else {
-				LOG(("MTP Error: could not find request dc for delayed resend, requestId %1").arg(requestId));
-				continue;
-			}
-		}
-
-		mtpRequest req;
-		{
-			QReadLocker locker(&requestMapLock);
-			RequestMap::const_iterator j = requestMap.constFind(requestId);
-			if (j == requestMap.cend()) {
-				DEBUG_LOG(("MTP Error: could not find request %1").arg(requestId));
-				continue;
-			}
-			req = j.value();
-		}
-		if (Session *session = getSession(qAbs(dcWithShift))) {
-			session->sendPrepared(req);
-		}
-	}
-
-	if (!delayedRequests.isEmpty()) {
-		_timer.start(delayedRequests.front().second - now);
-	}
-}
-
-void GlobalSlotCarrier::connectionFinished(Connection *connection) {
-	MTPQuittingConnections::iterator i = quittingConnections.find(connection);
-	if (i != quittingConnections.cend()) {
-		quittingConnections.erase(i);
-	}
-
-	connection->waitTillFinish();
-	delete connection;
-}
-
-GlobalSlotCarrier *globalSlotCarrier() {
-	return _globalSlotCarrier;
-}
-
-void queueQuittingConnection(Connection *connection) {
-	quittingConnections.insert(connection);
-}
-
 } // namespace internal
 
-void start() {
-	if (started()) return;
-
-    unixtimeInit();
-
-	internal::DcenterMap &dcs(internal::DCMap());
-
-	_globalSlotCarrier = new internal::GlobalSlotCarrier();
-
-	mainSession = new internal::Session(internal::mainDC());
-	sessions.insert(mainSession->getDcWithShift(), mainSession);
-
-	_started = true;
-
-	if (internal::configNeeded()) {
-		internal::configLoader()->load();
-	}
-}
-
-bool started() {
-	return _started;
-}
-
-void restart() {
-	if (!_started) return;
-
-	for (auto i = sessions.cbegin(), e = sessions.cend(); i != e; ++i) {
-		i.value()->restart();
-	}
-}
-
-void restart(int32 dcMask) {
-	if (!_started) return;
-
-	dcMask = bareDcId(dcMask);
-	for (Sessions::const_iterator i = sessions.cbegin(), e = sessions.cend(); i != e; ++i) {
-		if (bareDcId(i.value()->getDcWithShift()) == dcMask) {
-			i.value()->restart();
-		}
-	}
-}
-
-void configure(int32 dc) {
-	if (_started) return;
-	internal::setDC(dc);
-}
-
-void setdc(int32 dc, bool fromZeroOnly) {
-	if (!dc || !_started) return;
-	internal::setDC(dc, fromZeroOnly);
-	int32 oldMainDc = mainSession->getDcWithShift();
-	if (maindc() != oldMainDc) {
-		killSession(oldMainDc);
-	}
-	Local::writeMtpData();
-}
-
-int32 maindc() {
-	return internal::mainDC();
-}
-
-int32 dcstate(int32 dc) {
-	if (!_started) return 0;
-
-	if (!dc) return mainSession->getState();
-	if (!bareDcId(dc)) {
-		dc += bareDcId(mainSession->getDcWithShift());
-	}
-
-	Sessions::const_iterator i = sessions.constFind(dc);
-	if (i != sessions.cend()) return i.value()->getState();
-
-	return DisconnectedState;
-}
-
-QString dctransport(int32 dc) {
-	if (!_started) return QString();
-
-	if (!dc) return mainSession->transport();
-	if (!bareDcId(dc)) {
-		dc += bareDcId(mainSession->getDcWithShift());
-	}
-
-	Sessions::const_iterator i = sessions.constFind(dc);
-	if (i != sessions.cend()) return i.value()->transport();
-
-	return QString();
-}
-
-void ping() {
-	if (internal::Session *session = internal::getSession(0)) {
-		session->ping();
-	}
-}
-
-void cancel(mtpRequestId requestId) {
-	if (!_started || !requestId) return;
-
-	mtpMsgId msgId = 0;
-	requestsDelays.remove(requestId);
-	{
-		QWriteLocker locker(&requestMapLock);
-		RequestMap::iterator i = requestMap.find(requestId);
-		if (i != requestMap.end()) {
-			msgId = *(mtpMsgId*)(i.value()->constData() + 4);
-			requestMap.erase(i);
-		}
-	}
-	{
-		QMutexLocker locker(&requestByDCLock);
-		RequestsByDC::iterator i = requestsByDC.find(requestId);
-		if (i != requestsByDC.end()) {
-			if (internal::Session *session = internal::getSession(qAbs(i.value()))) {
-				session->cancel(requestId, msgId);
-			}
-			requestsByDC.erase(i);
-		}
-	}
-	internal::clearCallbacks(requestId);
-}
-
-void killSession(int32 dc) {
-	Sessions::iterator i = sessions.find(dc);
-	if (i != sessions.cend()) {
-		bool wasMain = (i.value() == mainSession);
-
-		i.value()->kill();
-		i.value()->deleteLater();
-		sessions.erase(i);
-
-		if (wasMain) {
-			mainSession = new internal::Session(internal::mainDC());
-			int32 newdc = mainSession->getDcWithShift();
-			i = sessions.find(newdc);
-			if (i != sessions.cend()) {
-				i.value()->kill();
-				i.value()->deleteLater();
-				sessions.erase(i);
-			}
-			sessions.insert(newdc, mainSession);
-		}
-	}
-}
-
-void stopSession(int32 dc) {
-	Sessions::iterator i = sessions.find(dc);
-	if (i != sessions.end()) {
-		if (i.value() != mainSession) { // don't stop main session
-			i.value()->stop();
-		}
-	}
-}
-
-int32 state(mtpRequestId requestId) {
-	if (requestId > 0) {
-		QMutexLocker locker(&requestByDCLock);
-		RequestsByDC::iterator i = requestsByDC.find(requestId);
-		if (i != requestsByDC.end()) {
-			if (internal::Session *session = internal::getSession(qAbs(i.value()))) {
-				return session->requestState(requestId);
-			}
-			return MTP::RequestConnecting;
-		}
-		return MTP::RequestSent;
-	}
-	if (internal::Session *session = internal::getSession(-requestId)) {
-		return session->requestState(0);
-	}
-	return MTP::RequestConnecting;
-}
-
-void finish() {
-	mainSession = nullptr;
-	for (auto session : base::take(sessions)) {
-		session->kill();
-		delete session;
-	}
-
-	for_const (auto connection, quittingConnections) {
-		connection->waitTillFinish();
-		delete connection;
-	}
-	quittingConnections.clear();
-
-	delete _globalSlotCarrier;
-	_globalSlotCarrier = nullptr;
-
-	internal::destroyConfigLoader();
-
-	_started = false;
-}
-
-void logoutKeys(RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail) {
-	mtpRequestId req = MTP::send(MTPauth_LogOut(), onDone, onFail);
-	internal::logoutOtherDCs();
-}
-
-void setGlobalDoneHandler(RPCDoneHandlerPtr handler) {
-	globalHandler.onDone = handler;
-}
-
-void setGlobalFailHandler(RPCFailHandlerPtr handler) {
-	globalHandler.onFail = handler;
-}
-
-void setStateChangedHandler(MTPStateChangedHandler handler) {
-	stateChangedHandler = handler;
-}
-
-void setSessionResetHandler(MTPSessionResetHandler handler) {
-	sessionResetHandler = handler;
-}
-
-void clearGlobalHandlers() {
-	setGlobalDoneHandler(RPCDoneHandlerPtr());
-	setGlobalFailHandler(RPCFailHandlerPtr());
-	setStateChangedHandler(0);
-	setSessionResetHandler(0);
-}
-
-AuthKeysMap getKeys() {
-	return internal::getAuthKeys();
-}
-
-void setKey(int dc, const AuthKey::Data &key) {
-	auto dcId = MTP::bareDcId(dc);
-	auto keyPtr = std::make_shared<MTP::AuthKey>();
-	keyPtr->setDC(dcId);
-	keyPtr->setKey(key);
-	return internal::setAuthKey(dc, std::move(keyPtr));
+Instance *MainInstance() {
+	return Messenger::Instance().mtp();
 }
 
 } // namespace MTP

Telegram/SourceFiles/mtproto/facade.h

@@ -23,58 +23,41 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 #include "mtproto/core_types.h"
 #include "mtproto/session.h"
 #include "core/single_timer.h"
+#include "mtproto/mtp_instance.h"
 
 namespace MTP {
 namespace internal {
 
-Session *getSession(ShiftedDcId shiftedDcId); // 0 - current set dc
-
 bool paused();
 void pause();
 void unpause();
 
-void registerRequest(mtpRequestId requestId, int32 dc);
-void unregisterRequest(mtpRequestId requestId);
-
-mtpRequestId storeRequest(mtpRequest &request, const RPCResponseHandler &parser);
-mtpRequest getRequest(mtpRequestId req);
-void wrapInvokeAfter(mtpRequest &to, const mtpRequest &from, const mtpRequestMap &haveSent, int32 skipBeforeRequest = 0);
-void clearCallbacks(mtpRequestId requestId, int32 errorCode = RPCError::NoError); // 0 - do not toggle onError callback
-void clearCallbacksDelayed(const RPCCallbackClears &requestIds);
-void performDelayedClear();
-void execCallback(mtpRequestId requestId, const mtpPrime *from, const mtpPrime *end);
-bool hasCallbacks(mtpRequestId requestId);
-void globalCallback(const mtpPrime *from, const mtpPrime *end);
-void onStateChange(int32 dcWithShift, int32 state);
-void onSessionReset(int32 dcWithShift);
-bool rpcErrorOccured(mtpRequestId requestId, const RPCFailHandlerPtr &onFail, const RPCError &err); // return true if need to clean request data
-inline bool rpcErrorOccured(mtpRequestId requestId, const RPCResponseHandler &handler, const RPCError &err) {
-	return rpcErrorOccured(requestId, handler.onFail, err);
-}
-
-// used for:
-// - resending requests by timer which were postponed by flood delay
-// - destroying MTProtoConnections whose thread has finished
-class GlobalSlotCarrier : public QObject {
-	Q_OBJECT
+} // namespace internal
 
+class PauseHolder {
 public:
-	GlobalSlotCarrier();
-
-public slots:
-	void checkDelayed();
-	void connectionFinished(Connection *connection);
+	PauseHolder() {
+		restart();
+	}
+	void restart() {
+		if (!base::take(_paused, true)) {
+			internal::pause();
+		}
+	}
+	void release() {
+		if (base::take(_paused)) {
+			internal::unpause();
+		}
+	}
+	~PauseHolder() {
+		release();
+	}
 
 private:
-	SingleTimer _timer;
+	bool _paused = false;
 
 };
 
-GlobalSlotCarrier *globalSlotCarrier();
-void queueQuittingConnection(Connection *connection);
-
-} // namespace internal
-
 constexpr ShiftedDcId DCShift = 10000;
 constexpr DcId bareDcId(ShiftedDcId shiftedDcId) {
 	return (shiftedDcId % DCShift);
@@ -135,115 +118,105 @@ constexpr bool isUplDcId(ShiftedDcId shiftedDcId) {
 	return (shiftedDcId >= internal::uploadDcId(0, 0)) && (shiftedDcId < internal::uploadDcId(0, MTPUploadSessionsCount - 1) + DCShift);
 }
 
-void start();
-bool started();
-void restart();
-void restart(int32 dcMask);
-
-class PauseHolder {
-public:
-	PauseHolder() {
-		restart();
-	}
-	void restart() {
-		if (!base::take(_paused, true)) {
-			internal::pause();
-		}
-	}
-	void release() {
-		if (base::take(_paused)) {
-			internal::unpause();
-		}
-	}
-	~PauseHolder() {
-		release();
-	}
-
-private:
-	bool _paused = false;
-
-};
-
-void configure(int32 dc);
-
-void setdc(int32 dc, bool fromZeroOnly = false);
-int32 maindc();
-
 enum {
 	DisconnectedState = 0,
 	ConnectingState = 1,
 	ConnectedState = 2,
 };
-int32 dcstate(int32 dc = 0);
-QString dctransport(int32 dc = 0);
-
-template <typename TRequest>
-inline mtpRequestId send(const TRequest &request, RPCResponseHandler callbacks = RPCResponseHandler(), int32 dc = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
-	if (internal::Session *session = internal::getSession(dc)) {
-		return session->send(request, callbacks, msCanWait, true, !dc, after);
-	}
-	return 0;
-}
-template <typename TRequest>
-inline mtpRequestId send(const TRequest &request, RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail = RPCFailHandlerPtr(), int32 dc = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
-	return send(request, RPCResponseHandler(onDone, onFail), dc, msCanWait, after);
-}
-inline void sendAnything(int32 dc = 0, TimeMs msCanWait = 0) {
-	if (auto session = internal::getSession(dc)) {
-		return session->sendAnything(msCanWait);
-	}
-}
-void ping();
-void cancel(mtpRequestId req);
-void killSession(int32 dc);
-void stopSession(int32 dc);
 
 enum {
 	RequestSent = 0,
 	RequestConnecting = 1,
 	RequestSending = 2
 };
-int32 state(mtpRequestId req); // < 0 means waiting for such count of ms
 
-void finish();
+Instance *MainInstance();
 
-void logoutKeys(RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail);
+inline void restart() {
+	return MainInstance()->restart();
+}
 
-void setGlobalDoneHandler(RPCDoneHandlerPtr handler);
-void setGlobalFailHandler(RPCFailHandlerPtr handler);
-void setStateChangedHandler(MTPStateChangedHandler handler);
-void setSessionResetHandler(MTPSessionResetHandler handler);
-void clearGlobalHandlers();
+inline void restart(ShiftedDcId shiftedDcId) {
+	return MainInstance()->restart(shiftedDcId);
+}
 
-AuthKeysMap getKeys();
-void setKey(int dc, const AuthKey::Data &key);
+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);
+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));
+		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 = MTP::internal::getRequest(after);
-			requestId = MTP::internal::storeRequest(reqSerialized, callbacks);
+		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;
-			MTP::internal::rpcErrorOccured(requestId, callbacks, rpcClientError("NO_REQUEST_ID", QString("send() failed to queue request, exception: %1").arg(e.what())));
-		}
-		if (requestId) MTP::internal::registerRequest(requestId, toMainDC ? -getDcWithShift() : getDcWithShift());
-		return requestId;
+		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

Telegram/SourceFiles/mtproto/mtp_instance.h

@@ -0,0 +1,131 @@
+/*
+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/dcenter.h"
+#include <map>
+#include <set>
+
+namespace MTP {
+
+class DcOptions;
+class Session;
+
+class Instance : public QObject {
+	Q_OBJECT
+
+public:
+	struct Config {
+		static constexpr auto kNoneMainDc = -1;
+		static constexpr auto kNotSetMainDc = 0;
+		static constexpr auto kDefaultMainDc = 2;
+
+		DcId mainDcId = kNotSetMainDc;
+		std::map<DcId, AuthKey::Data> keys;
+	};
+	Instance(DcOptions *options, Config &&config);
+
+	Instance(const Instance &other) = delete;
+	Instance &operator=(const Instance &other) = delete;
+
+	void suggestMainDcId(DcId mainDcId);
+	void setMainDcId(DcId mainDcId);
+	DcId mainDcId() const;
+
+	void Instance::setKeyForWrite(DcId dcId, const AuthKeyPtr &key);
+	AuthKeysMap Instance::getKeysForWrite() const;
+
+	DcOptions *dcOptions();
+
+	template <typename TRequest>
+	mtpRequestId send(const TRequest &request, RPCResponseHandler callbacks = RPCResponseHandler(), ShiftedDcId dcId = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
+		if (auto session = getSession(dcId)) {
+			return session->send(request, callbacks, msCanWait, true, !dcId, after);
+		}
+		return 0;
+	}
+
+	template <typename TRequest>
+	mtpRequestId send(const TRequest &request, RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail = RPCFailHandlerPtr(), int32 dc = 0, TimeMs msCanWait = 0, mtpRequestId after = 0) {
+		return send(request, RPCResponseHandler(onDone, onFail), dc, msCanWait, after);
+	}
+
+	void sendAnything(ShiftedDcId dcId = 0, TimeMs msCanWait = 0) {
+		if (auto session = getSession(dcId)) {
+			session->sendAnything(msCanWait);
+		}
+	}
+
+	void restart();
+	void restart(ShiftedDcId shiftedDcId);
+	int32 dcstate(ShiftedDcId shiftedDcId = 0);
+	QString dctransport(ShiftedDcId shiftedDcId = 0);
+	void ping();
+	void cancel(mtpRequestId requestId);
+	int32 state(mtpRequestId requestId); // < 0 means waiting for such count of ms
+	void killSession(ShiftedDcId shiftedDcId);
+	void stopSession(ShiftedDcId shiftedDcId);
+	void logout(RPCDoneHandlerPtr onDone, RPCFailHandlerPtr onFail);
+
+	internal::DcenterPtr getDcById(DcId dcId);
+	void unpaused();
+
+	void queueQuittingConnection(std::unique_ptr<internal::Connection> connection);
+
+	void setUpdatesHandler(RPCDoneHandlerPtr onDone);
+	void setGlobalFailHandler(RPCFailHandlerPtr onFail);
+	void setStateChangedHandler(base::lambda<void(ShiftedDcId shiftedDcId, int32 state)> &&handler);
+	void setSessionResetHandler(base::lambda<void(ShiftedDcId shiftedDcId)> &&handler);
+	void clearGlobalHandlers();
+
+	void onStateChange(ShiftedDcId dcWithShift, int32 state);
+	void onSessionReset(ShiftedDcId dcWithShift);
+
+	void registerRequest(mtpRequestId requestId, ShiftedDcId dcWithShift);
+	mtpRequestId storeRequest(mtpRequest &request, const RPCResponseHandler &parser);
+	mtpRequest getRequest(mtpRequestId requestId);
+	void clearCallbacksDelayed(const RPCCallbackClears &requestIds);
+
+	void execCallback(mtpRequestId requestId, const mtpPrime *from, const mtpPrime *end);
+	bool hasCallbacks(mtpRequestId requestId);
+	void globalCallback(const mtpPrime *from, const mtpPrime *end);
+
+	// return true if need to clean request data
+	bool rpcErrorOccured(mtpRequestId requestId, const RPCFailHandlerPtr &onFail, const RPCError &err);
+
+	~Instance();
+
+public slots:
+	void configLoadRequest();
+	void connectionFinished(internal::Connection *connection);
+
+signals:
+	void configLoaded();
+
+private:
+	internal::Session *getSession(ShiftedDcId shiftedDcId);
+
+	class Private;
+	const std::unique_ptr<Private> _private;
+
+};
+
+} // namespace MTP

Telegram/SourceFiles/mtproto/session.cpp

@@ -19,13 +19,14 @@ Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
 Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 */
 #include "stdafx.h"
-
 #include "mtproto/session.h"
 
+#include "mtproto/connection.h"
+
 namespace MTP {
 namespace internal {
 
-void SessionData::clear() {
+void SessionData::clear(Instance *instance) {
 	RPCCallbackClears clearCallbacks;
 	{
 		QReadLocker locker1(haveSentMutex()), locker2(toResendMutex()), locker3(haveReceivedMutex()), locker4(wereAckedMutex());
@@ -66,42 +67,23 @@ void SessionData::clear() {
 		QWriteLocker locker(receivedIdsMutex());
 		receivedIds.clear();
 	}
-	clearCallbacksDelayed(clearCallbacks);
+	instance->clearCallbacksDelayed(clearCallbacks);
 }
 
 
-Session::Session(int32 requestedDcId) : QObject()
-, _connection(0)
-, _killed(false)
-, _needToReceive(false)
-, data(this)
-, dcWithShift(0)
-, dc(0)
-, msSendCall(0)
-, msWait(0)
-, _ping(false) {
-	if (_killed) {
-		DEBUG_LOG(("Session Error: can't start a killed session"));
-		return;
-	}
-	if (dcWithShift) {
-		DEBUG_LOG(("Session Info: Session::start called on already started session"));
-		return;
-	}
-
-	msSendCall = msWait = 0;
-
+Session::Session(Instance *instance, ShiftedDcId requestedShiftedDcId) : QObject()
+, _instance(instance)
+, data(this) {
 	connect(&timeouter, SIGNAL(timeout()), this, SLOT(checkRequestsByTimer()));
 	timeouter.start(1000);
 
 	connect(&sender, SIGNAL(timeout()), this, SLOT(needToResumeAndSend()));
 
-	_connection = new Connection();
-	dcWithShift = _connection->prepare(&data, requestedDcId);
+	_connection = std::make_unique<Connection>(_instance);
+	dcWithShift = _connection->prepare(&data, requestedShiftedDcId);
 	if (!dcWithShift) {
-		delete _connection;
-		_connection = 0;
-		DEBUG_LOG(("Session Info: could not start connection to dc %1").arg(requestedDcId));
+		_connection.reset();
+		DEBUG_LOG(("Session Info: could not start connection to dc %1").arg(requestedShiftedDcId));
 		return;
 	}
 	createDcData();
@@ -112,24 +94,33 @@ void Session::createDcData() {
 	if (dc) {
 		return;
 	}
-	int32 dcId = bareDcId(dcWithShift);
+	auto dcId = bareDcId(dcWithShift);
 
-	auto &dcs = DCMap();
-	auto dcIndex = dcs.constFind(dcId);
-	if (dcIndex == dcs.cend()) {
-		dc = DcenterPtr(new Dcenter(dcId, AuthKeyPtr()));
-		dcs.insert(dcId, dc);
-	} else {
-		dc = dcIndex.value();
-	}
+	dc = _instance->getDcById(dcId);
 
 	ReadLockerAttempt lock(keyMutex());
 	data.setKey(lock ? dc->getKey() : AuthKeyPtr());
 	if (lock && dc->connectionInited()) {
 		data.setLayerWasInited(true);
 	}
-	connect(dc.data(), SIGNAL(authKeyCreated()), this, SLOT(authKeyCreatedForDC()), Qt::QueuedConnection);
-	connect(dc.data(), SIGNAL(layerWasInited(bool)), this, SLOT(layerWasInitedForDC(bool)), Qt::QueuedConnection);
+	connect(dc.get(), SIGNAL(authKeyCreated()), this, SLOT(authKeyCreatedForDC()), Qt::QueuedConnection);
+	connect(dc.get(), SIGNAL(layerWasInited(bool)), this, SLOT(layerWasInitedForDC(bool)), Qt::QueuedConnection);
+}
+
+void Session::registerRequest(mtpRequestId requestId, ShiftedDcId dcWithShift) {
+	return _instance->registerRequest(requestId, dcWithShift);
+}
+
+mtpRequestId Session::storeRequest(mtpRequest &request, const RPCResponseHandler &parser) {
+	return _instance->storeRequest(request, parser);
+}
+
+mtpRequest Session::getRequest(mtpRequestId requestId) {
+	return _instance->getRequest(requestId);
+}
+
+bool Session::rpcErrorOccured(mtpRequestId requestId, const RPCFailHandlerPtr &onFail, const RPCError &err) { // return true if need to clean request data
+	return _instance->rpcErrorOccured(requestId, onFail, err);
 }
 
 void Session::restart() {
@@ -148,7 +139,7 @@ void Session::stop() {
 	DEBUG_LOG(("Session Info: stopping session dcWithShift %1").arg(dcWithShift));
 	if (_connection) {
 		_connection->kill();
-		_connection = 0;
+		_instance->queueQuittingConnection(std::move(_connection));
 	}
 }
 
@@ -202,12 +193,9 @@ void Session::needToResumeAndSend() {
 	}
 	if (!_connection) {
 		DEBUG_LOG(("Session Info: resuming session dcWithShift %1").arg(dcWithShift));
-		DcenterMap &dcs(DCMap());
-
-		_connection = new Connection();
+		_connection = std::make_unique<Connection>(_instance);
 		if (!_connection->prepare(&data, dcWithShift)) {
-			delete _connection;
-			_connection = 0;
+			_connection.reset();
 			DEBUG_LOG(("Session Info: could not start connection to dcWithShift %1").arg(dcWithShift));
 			dcWithShift = 0;
 			return;
@@ -298,16 +286,16 @@ void Session::checkRequestsByTimer() {
 				}
 			}
 		}
-		clearCallbacksDelayed(clearCallbacks);
+		_instance->clearCallbacksDelayed(clearCallbacks);
 	}
 }
 
 void Session::onConnectionStateChange(qint32 newState) {
-	onStateChange(dcWithShift, newState);
+	_instance->onStateChange(dcWithShift, newState);
 }
 
 void Session::onResetDone() {
-	onSessionReset(dcWithShift);
+	_instance->onSessionReset(dcWithShift);
 }
 
 void Session::cancel(mtpRequestId requestId, mtpMsgId msgId) {
@@ -473,9 +461,9 @@ void Session::authKeyCreatedForDC() {
 	emit authKeyCreated();
 }
 
-void Session::notifyKeyCreated(const AuthKeyPtr &key) {
+void Session::notifyKeyCreated(AuthKeyPtr &&key) {
 	DEBUG_LOG(("AuthKey Info: Session::keyCreated(), setting, dcWithShift %1").arg(dcWithShift));
-	dc->setKey(key);
+	dc->setKey(std::move(key));
 }
 
 void Session::layerWasInitedForDC(bool wasInited) {
@@ -530,17 +518,17 @@ void Session::tryToReceive() {
 		}
 		if (requestId <= 0) {
 			if (dcWithShift == bareDcId(dcWithShift)) { // call globalCallback only in main session
-				globalCallback(response.constData(), response.constData() + response.size());
+				_instance->globalCallback(response.constData(), response.constData() + response.size());
 			}
 		} else {
-			execCallback(requestId, response.constData(), response.constData() + response.size());
+			_instance->execCallback(requestId, response.constData(), response.constData() + response.size());
 		}
 		++cnt;
 	}
 }
 
 Session::~Session() {
-	t_assert(_connection == 0);
+	t_assert(_connection == nullptr);
 }
 
 MTPrpcError rpcClientError(const QString &type, const QString &description) {

Telegram/SourceFiles/mtproto/session.h

@@ -20,14 +20,17 @@ Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
 */
 #pragma once
 
-#include "mtproto/connection.h"
 #include "mtproto/dcenter.h"
-#include "mtproto/rpc_sender.h"
 #include "core/single_timer.h"
 
 namespace MTP {
+
+class Instance;
+
 namespace internal {
 
+class Connection;
+
 class ReceivedMsgIds {
 public:
 	bool registerMsgId(mtpMsgId msgId, bool needAck) {
@@ -236,7 +239,7 @@ public:
 		return result * 2 + (needAck ? 1 : 0);
 	}
 
-	void clear();
+	void clear(Instance *instance);
 
 private:
 	uint64 _session = 0;
@@ -275,7 +278,7 @@ class Session : public QObject {
 	Q_OBJECT
 
 public:
-	Session(int32 dcenter);
+	Session(Instance *instance, ShiftedDcId requestedShiftedDcId);
 
 	void restart();
 	void stop();
@@ -283,10 +286,10 @@ public:
 
 	void unpaused();
 
-	int32 getDcWithShift() const;
+	ShiftedDcId getDcWithShift() const;
 
 	QReadWriteLock *keyMutex() const;
-	void notifyKeyCreated(const AuthKeyPtr &key);
+	void notifyKeyCreated(AuthKeyPtr &&key);
 	void destroyKey();
 	void notifyLayerInited(bool wasInited);
 
@@ -331,19 +334,26 @@ public slots:
 private:
 	void createDcData();
 
-	Connection *_connection;
+	void registerRequest(mtpRequestId requestId, ShiftedDcId dcWithShift);
+	mtpRequestId storeRequest(mtpRequest &request, const RPCResponseHandler &parser);
+	mtpRequest getRequest(mtpRequestId requestId);
+	bool rpcErrorOccured(mtpRequestId requestId, const RPCFailHandlerPtr &onFail, const RPCError &err);
 
-	bool _killed;
-	bool _needToReceive;
+	Instance *_instance;
+	std::unique_ptr<Connection> _connection;
+
+	bool _killed = false;
+	bool _needToReceive = false;
 
 	SessionData data;
 
-	int32 dcWithShift;
+	ShiftedDcId dcWithShift = 0;
 	DcenterPtr dc;
 
-	TimeMs msSendCall, msWait;
+	TimeMs msSendCall = 0;
+	TimeMs msWait = 0;
 
-	bool _ping;
+	bool _ping = false;
 
 	QTimer timeouter;
 	SingleTimer sender;

Telegram/SourceFiles/passcodewidget.cpp

@@ -72,7 +72,7 @@ void PasscodeWidget::onSubmit() {
 		if (Local::readMap(_passcode->text().toUtf8()) != Local::ReadMapPassNeeded) {
 			cSetPasscodeBadTries(0);
 
-			MTP::start();
+			Messenger::Instance().startMtp();
 			if (AuthSession::Current()) {
 				App::wnd()->setupMain();
 			} else {

Telegram/SourceFiles/structs.h

@@ -186,9 +186,9 @@ static const NotifySettingsPtr EmptyNotifySettings = NotifySettingsPtr(1);
 extern NotifySettings globalNotifyAll, globalNotifyUsers, globalNotifyChats;
 extern NotifySettingsPtr globalNotifyAllPtr, globalNotifyUsersPtr, globalNotifyChatsPtr;
 
-inline bool isNotifyMuted(NotifySettingsPtr settings, TimeId *changeIn = 0) {
+inline bool isNotifyMuted(NotifySettingsPtr settings, TimeId *changeIn = nullptr) {
 	if (settings != UnknownNotifySettings && settings != EmptyNotifySettings) {
-		TimeId t = unixtime();
+		auto t = unixtime();
 		if (settings->mute > t) {
 			if (changeIn) *changeIn = settings->mute - t + 1;
 			return true;

Telegram/gyp/Telegram.gyp

@@ -323,8 +323,6 @@
       '<(src_loc)/media/media_clip_qtgif.h',
       '<(src_loc)/media/media_clip_reader.cpp',
       '<(src_loc)/media/media_clip_reader.h',
-      '<(src_loc)/mtproto/facade.cpp',
-      '<(src_loc)/mtproto/facade.h',
       '<(src_loc)/mtproto/auth_key.cpp',
       '<(src_loc)/mtproto/auth_key.h',
       '<(src_loc)/mtproto/connection.cpp',
@@ -343,8 +341,12 @@
       '<(src_loc)/mtproto/dcenter.h',
       '<(src_loc)/mtproto/dc_options.cpp',
       '<(src_loc)/mtproto/dc_options.h',
+      '<(src_loc)/mtproto/facade.cpp',
+      '<(src_loc)/mtproto/facade.h',
       '<(src_loc)/mtproto/file_download.cpp',
       '<(src_loc)/mtproto/file_download.h',
+      '<(src_loc)/mtproto/mtp_instance.cpp',
+      '<(src_loc)/mtproto/mtp_instance.h',
       '<(src_loc)/mtproto/rsa_public_key.cpp',
       '<(src_loc)/mtproto/rsa_public_key.h',
       '<(src_loc)/mtproto/rpc_sender.cpp',