tdesktop/Telegram/SourceFiles/mtproto/session.cpp

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/*
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.
2015-10-03 13:16:42 +00:00
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
*/
#include "mtproto/session.h"
#include "mtproto/connection.h"
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#include "mtproto/dcenter.h"
#include "mtproto/auth_key.h"
namespace MTP {
namespace internal {
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void SessionData::setKey(const AuthKeyPtr &key) {
if (_authKey != key) {
uint64 session = rand_value<uint64>();
_authKey = key;
DEBUG_LOG(("MTP Info: new auth key set in SessionData, id %1, setting random server_session %2").arg(key ? key->keyId() : 0).arg(session));
QWriteLocker locker(&_lock);
if (_session != session) {
_session = session;
_messagesSent = 0;
}
_layerInited = false;
}
}
void SessionData::clear(Instance *instance) {
RPCCallbackClears clearCallbacks;
{
QReadLocker locker1(haveSentMutex()), locker2(toResendMutex()), locker3(haveReceivedMutex()), locker4(wereAckedMutex());
auto receivedResponsesEnd = _receivedResponses.cend();
clearCallbacks.reserve(_haveSent.size() + _wereAcked.size());
for (auto i = _haveSent.cbegin(), e = _haveSent.cend(); i != e; ++i) {
auto requestId = i.value()->requestId;
if (!_receivedResponses.contains(requestId)) {
clearCallbacks.push_back(requestId);
}
}
for (auto i = _toResend.cbegin(), e = _toResend.cend(); i != e; ++i) {
auto requestId = i.value();
if (!_receivedResponses.contains(requestId)) {
clearCallbacks.push_back(requestId);
}
}
for (auto i = _wereAcked.cbegin(), e = _wereAcked.cend(); i != e; ++i) {
auto requestId = i.value();
if (!_receivedResponses.contains(requestId)) {
clearCallbacks.push_back(requestId);
}
}
}
{
QWriteLocker locker(haveSentMutex());
_haveSent.clear();
}
{
QWriteLocker locker(toResendMutex());
_toResend.clear();
}
{
QWriteLocker locker(wereAckedMutex());
_wereAcked.clear();
}
{
QWriteLocker locker(receivedIdsMutex());
_receivedIds.clear();
}
instance->clearCallbacksDelayed(clearCallbacks);
}
Session::Session(not_null<Instance*> instance, ShiftedDcId shiftedDcId) : QObject()
, _instance(instance)
, data(this)
, dcWithShift(shiftedDcId) {
connect(&timeouter, SIGNAL(timeout()), this, SLOT(checkRequestsByTimer()));
timeouter.start(1000);
data.setSystemLangCode(instance->systemLangCode());
data.setCloudLangCode(instance->cloudLangCode());
connect(&sender, SIGNAL(timeout()), this, SLOT(needToResumeAndSend()));
}
void Session::start() {
createDcData();
_connection = std::make_unique<Connection>(_instance);
_connection->start(&data, dcWithShift);
if (_instance->isKeysDestroyer()) {
_instance->scheduleKeyDestroy(dcWithShift);
}
}
void Session::createDcData() {
if (dc) {
return;
}
dc = _instance->getDcById(dcWithShift);
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if (auto lock = ReadLockerAttempt(keyMutex())) {
data.setKey(dc->getKey());
if (dc->connectionInited()) {
data.setLayerWasInited(true);
}
}
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() {
if (_killed) {
DEBUG_LOG(("Session Error: can't restart a killed session"));
return;
}
data.setSystemLangCode(_instance->systemLangCode());
data.setCloudLangCode(_instance->cloudLangCode());
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emit needToRestart();
}
void Session::stop() {
if (_killed) {
DEBUG_LOG(("Session Error: can't kill a killed session"));
return;
}
DEBUG_LOG(("Session Info: stopping session dcWithShift %1").arg(dcWithShift));
if (_connection) {
_connection->kill();
_instance->queueQuittingConnection(std::move(_connection));
}
}
void Session::kill() {
stop();
_killed = true;
DEBUG_LOG(("Session Info: marked session dcWithShift %1 as killed").arg(dcWithShift));
}
void Session::unpaused() {
if (_needToReceive) {
_needToReceive = false;
QTimer::singleShot(0, this, SLOT(tryToReceive()));
}
}
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void Session::sendAnything(qint64 msCanWait) {
if (_killed) {
DEBUG_LOG(("Session Error: can't send anything in a killed session"));
return;
}
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auto ms = getms(true);
if (msSendCall) {
if (ms > msSendCall + msWait) {
msWait = 0;
} else {
msWait = (msSendCall + msWait) - ms;
if (msWait > msCanWait) {
msWait = msCanWait;
}
}
} else {
msWait = msCanWait;
}
if (msWait) {
DEBUG_LOG(("MTP Info: dcWithShift %1 can wait for %2ms from current %3").arg(dcWithShift).arg(msWait).arg(msSendCall));
msSendCall = ms;
sender.start(msWait);
} else {
DEBUG_LOG(("MTP Info: dcWithShift %1 stopped send timer, can wait for %2ms from current %3").arg(dcWithShift).arg(msWait).arg(msSendCall));
sender.stop();
msSendCall = 0;
needToResumeAndSend();
}
}
void Session::needToResumeAndSend() {
if (_killed) {
DEBUG_LOG(("Session Info: can't resume a killed session"));
return;
}
if (!_connection) {
DEBUG_LOG(("Session Info: resuming session dcWithShift %1").arg(dcWithShift));
createDcData();
_connection = std::make_unique<Connection>(_instance);
_connection->start(&data, dcWithShift);
}
if (_ping) {
_ping = false;
emit needToPing();
} else {
emit needToSend();
}
}
void Session::sendPong(quint64 msgId, quint64 pingId) {
send(MTP_pong(MTP_long(msgId), MTP_long(pingId)));
}
void Session::sendMsgsStateInfo(quint64 msgId, QByteArray data) {
auto info = std::string();
if (!data.isEmpty()) {
info.resize(data.size());
auto src = gsl::as_bytes(gsl::make_span(data));
// auto dst = gsl::as_writeable_bytes(gsl::make_span(info));
auto dst = gsl::as_writeable_bytes(gsl::make_span(&info[0], info.size()));
base::copy_bytes(dst, src);
}
send(MTPMsgsStateInfo(MTP_msgs_state_info(MTP_long(msgId), MTP_string(std::move(info)))));
}
void Session::checkRequestsByTimer() {
QVector<mtpMsgId> resendingIds;
QVector<mtpMsgId> removingIds; // remove very old (10 minutes) containers and resend requests
QVector<mtpMsgId> stateRequestIds;
{
QReadLocker locker(data.haveSentMutex());
mtpRequestMap &haveSent(data.haveSentMap());
uint32 haveSentCount(haveSent.size());
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auto ms = getms(true);
for (mtpRequestMap::iterator i = haveSent.begin(), e = haveSent.end(); i != e; ++i) {
mtpRequest &req(i.value());
if (req->msDate > 0) {
if (req->msDate + MTPCheckResendTimeout < ms) { // need to resend or check state
if (mtpRequestData::messageSize(req) < MTPResendThreshold) { // resend
resendingIds.reserve(haveSentCount);
resendingIds.push_back(i.key());
} else {
req->msDate = ms;
stateRequestIds.reserve(haveSentCount);
stateRequestIds.push_back(i.key());
}
}
} else if (unixtime() > (int32)(i.key() >> 32) + MTPContainerLives) {
removingIds.reserve(haveSentCount);
removingIds.push_back(i.key());
}
}
}
if (stateRequestIds.size()) {
DEBUG_LOG(("MTP Info: requesting state of msgs: %1").arg(Logs::vector(stateRequestIds)));
{
QWriteLocker locker(data.stateRequestMutex());
for (uint32 i = 0, l = stateRequestIds.size(); i < l; ++i) {
data.stateRequestMap().insert(stateRequestIds[i], true);
}
}
sendAnything(MTPCheckResendWaiting);
}
if (!resendingIds.isEmpty()) {
for (uint32 i = 0, l = resendingIds.size(); i < l; ++i) {
DEBUG_LOG(("MTP Info: resending request %1").arg(resendingIds[i]));
resend(resendingIds[i], MTPCheckResendWaiting);
}
}
if (!removingIds.isEmpty()) {
RPCCallbackClears clearCallbacks;
{
QWriteLocker locker(data.haveSentMutex());
mtpRequestMap &haveSent(data.haveSentMap());
for (uint32 i = 0, l = removingIds.size(); i < l; ++i) {
mtpRequestMap::iterator j = haveSent.find(removingIds[i]);
if (j != haveSent.cend()) {
if (j.value()->requestId) {
clearCallbacks.push_back(j.value()->requestId);
}
haveSent.erase(j);
}
}
}
_instance->clearCallbacksDelayed(clearCallbacks);
}
}
void Session::onConnectionStateChange(qint32 newState) {
_instance->onStateChange(dcWithShift, newState);
}
void Session::onResetDone() {
_instance->onSessionReset(dcWithShift);
}
void Session::cancel(mtpRequestId requestId, mtpMsgId msgId) {
if (requestId) {
QWriteLocker locker(data.toSendMutex());
data.toSendMap().remove(requestId);
}
if (msgId) {
QWriteLocker locker(data.haveSentMutex());
data.haveSentMap().remove(msgId);
}
}
void Session::ping() {
_ping = true;
sendAnything(0);
}
int32 Session::requestState(mtpRequestId requestId) const {
int32 result = MTP::RequestSent;
bool connected = false;
if (_connection) {
int32 s = _connection->state();
if (s == ConnectedState) {
connected = true;
} else if (s == ConnectingState || s == DisconnectedState) {
if (result < 0 || result == MTP::RequestSent) {
result = MTP::RequestConnecting;
}
} else if (s < 0) {
if ((result < 0 && s > result) || result == MTP::RequestSent) {
result = s;
}
}
}
if (!connected) {
return result;
}
if (!requestId) return MTP::RequestSent;
QWriteLocker locker(data.toSendMutex());
const mtpPreRequestMap &toSend(data.toSendMap());
mtpPreRequestMap::const_iterator i = toSend.constFind(requestId);
if (i != toSend.cend()) {
return MTP::RequestSending;
} else {
return MTP::RequestSent;
}
}
int32 Session::getState() const {
int32 result = -86400000;
if (_connection) {
int32 s = _connection->state();
if (s == ConnectedState) {
return s;
} else if (s == ConnectingState || s == DisconnectedState) {
if (result < 0) {
return s;
}
} else if (s < 0) {
if (result < 0 && s > result) {
result = s;
}
}
}
if (result == -86400000) {
result = DisconnectedState;
}
return result;
}
QString Session::transport() const {
return _connection ? _connection->transport() : QString();
}
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mtpRequestId Session::resend(quint64 msgId, qint64 msCanWait, bool forceContainer, bool sendMsgStateInfo) {
mtpRequest request;
{
QWriteLocker locker(data.haveSentMutex());
mtpRequestMap &haveSent(data.haveSentMap());
mtpRequestMap::iterator i = haveSent.find(msgId);
if (i == haveSent.end()) {
if (sendMsgStateInfo) {
char cantResend[2] = {1, 0};
DEBUG_LOG(("Message Info: cant resend %1, request not found").arg(msgId));
return send(MTP_msgs_state_info(MTP_long(msgId), MTP_string(std::string(cantResend, cantResend + 1))));
}
return 0;
}
request = i.value();
haveSent.erase(i);
}
if (mtpRequestData::isSentContainer(request)) { // for container just resend all messages we can
DEBUG_LOG(("Message Info: resending container from haveSent, msgId %1").arg(msgId));
const mtpMsgId *ids = (const mtpMsgId *)(request->constData() + 8);
for (uint32 i = 0, l = (request->size() - 8) >> 1; i < l; ++i) {
resend(ids[i], 10, true);
}
return 0xFFFFFFFF;
} else if (!mtpRequestData::isStateRequest(request)) {
request->msDate = forceContainer ? 0 : getms(true);
sendPrepared(request, msCanWait, false);
{
QWriteLocker locker(data.toResendMutex());
data.toResendMap().insert(msgId, request->requestId);
}
return request->requestId;
} else {
return 0;
}
}
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void Session::resendMany(QVector<quint64> msgIds, qint64 msCanWait, bool forceContainer, bool sendMsgStateInfo) {
for (int32 i = 0, l = msgIds.size(); i < l; ++i) {
resend(msgIds.at(i), msCanWait, forceContainer, sendMsgStateInfo);
}
}
void Session::resendAll() {
QVector<mtpMsgId> toResend;
{
QReadLocker locker(data.haveSentMutex());
const mtpRequestMap &haveSent(data.haveSentMap());
toResend.reserve(haveSent.size());
for (mtpRequestMap::const_iterator i = haveSent.cbegin(), e = haveSent.cend(); i != e; ++i) {
if (i.value()->requestId) toResend.push_back(i.key());
}
}
for (uint32 i = 0, l = toResend.size(); i < l; ++i) {
resend(toResend[i], 10, true);
}
}
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void Session::sendPrepared(const mtpRequest &request, TimeMs msCanWait, bool newRequest) { // returns true, if emit of needToSend() is needed
{
QWriteLocker locker(data.toSendMutex());
data.toSendMap().insert(request->requestId, request);
if (newRequest) {
*(mtpMsgId*)(request->data() + 4) = 0;
*(request->data() + 6) = 0;
}
}
DEBUG_LOG(("MTP Info: added, requestId %1").arg(request->requestId));
sendAnything(msCanWait);
}
QReadWriteLock *Session::keyMutex() const {
return dc->keyMutex();
}
void Session::authKeyCreatedForDC() {
DEBUG_LOG(("AuthKey Info: Session::authKeyCreatedForDC slot, emitting authKeyCreated(), dcWithShift %1").arg(dcWithShift));
data.setKey(dc->getKey());
emit authKeyCreated();
}
void Session::notifyKeyCreated(AuthKeyPtr &&key) {
DEBUG_LOG(("AuthKey Info: Session::keyCreated(), setting, dcWithShift %1").arg(dcWithShift));
dc->setKey(std::move(key));
}
void Session::layerWasInitedForDC(bool wasInited) {
DEBUG_LOG(("MTP Info: Session::layerWasInitedForDC slot, dcWithShift %1").arg(dcWithShift));
data.setLayerWasInited(wasInited);
}
void Session::notifyLayerInited(bool wasInited) {
DEBUG_LOG(("MTP Info: emitting MTProtoDC::layerWasInited(%1), dcWithShift %2").arg(Logs::b(wasInited)).arg(dcWithShift));
dc->setConnectionInited(wasInited);
emit dc->layerWasInited(wasInited);
}
void Session::destroyKey() {
if (!dc) return;
if (data.getKey()) {
DEBUG_LOG(("MTP Info: destroying auth_key for dcWithShift %1").arg(dcWithShift));
if (data.getKey() == dc->getKey()) {
dc->destroyKey();
}
data.setKey(AuthKeyPtr());
}
}
int32 Session::getDcWithShift() const {
return dcWithShift;
}
void Session::tryToReceive() {
if (_killed) {
DEBUG_LOG(("Session Error: can't receive in a killed session"));
return;
}
if (paused()) {
_needToReceive = true;
return;
}
while (true) {
auto requestId = mtpRequestId(0);
auto isUpdate = false;
auto message = SerializedMessage();
{
QWriteLocker locker(data.haveReceivedMutex());
auto &responses = data.haveReceivedResponses();
auto response = responses.begin();
if (response == responses.cend()) {
auto &updates = data.haveReceivedUpdates();
auto update = updates.begin();
if (update == updates.cend()) {
return;
} else {
message = std::move(*update);
isUpdate = true;
updates.pop_front();
}
} else {
requestId = response.key();
message = std::move(response.value());
responses.erase(response);
}
}
if (isUpdate) {
if (dcWithShift == bareDcId(dcWithShift)) { // call globalCallback only in main session
_instance->globalCallback(message.constData(), message.constData() + message.size());
}
} else {
_instance->execCallback(requestId, message.constData(), message.constData() + message.size());
}
}
}
Session::~Session() {
Assert(_connection == nullptr);
}
MTPrpcError rpcClientError(const QString &type, const QString &description) {
return MTP_rpc_error(MTP_int(0), MTP_string(("CLIENT_" + type + (description.length() ? (": " + description) : "")).toUtf8().constData()));
}
} // namespace internal
} // namespace MTP