tdesktop/Telegram/SourceFiles/mtproto/mtpSession.cpp

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/*
This file is part of Telegram Desktop,
an unofficial desktop 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.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014 John Preston, https://tdesktop.com
*/
#include "stdafx.h"
#include <QtCore/QSharedPointer>
void MTPSessionData::clear() {
RPCCallbackClears clearCallbacks;
{
QReadLocker locker1(haveSentMutex()), locker2(toResendMutex()), locker3(haveReceivedMutex()), locker4(wereAckedMutex());
mtpResponseMap::const_iterator end = haveReceived.cend();
clearCallbacks.reserve(haveSent.size() + wereAcked.size());
for (mtpRequestMap::const_iterator i = haveSent.cbegin(), e = haveSent.cend(); i != e; ++i) {
mtpRequestId requestId = i.value()->requestId;
if (haveReceived.find(requestId) == end) {
clearCallbacks.push_back(requestId);
}
}
for (mtpRequestIdsMap::const_iterator i = toResend.cbegin(), e = toResend.cend(); i != e; ++i) {
mtpRequestId requestId = i.value();
if (haveReceived.find(requestId) == end) {
clearCallbacks.push_back(requestId);
}
}
for (mtpRequestIdsMap::const_iterator i = wereAcked.cbegin(), e = wereAcked.cend(); i != e; ++i) {
mtpRequestId requestId = i.value();
if (haveReceived.find(requestId) == end) {
clearCallbacks.push_back(requestId);
}
}
}
{
QWriteLocker locker(haveSentMutex());
haveSent.clear();
}
{
QWriteLocker locker(toResendMutex());
toResend.clear();
}
{
QWriteLocker locker(wereAckedMutex());
wereAcked.clear();
}
{
QWriteLocker locker(receivedIdsMutex());
receivedIds.clear();
}
_mtp_internal::clearCallbacksDelayed(clearCallbacks);
}
MTProtoSession::MTProtoSession() : data(this), dcId(0), dc(0), msSendCall(0), msWait(0) {
}
void MTProtoSession::start(int32 dcenter, uint32 connects) {
if (dcId) {
DEBUG_LOG(("Session Info: MTProtoSession::start called on already started session"));
return;
}
if (connects < 1) {
connects = cConnectionsInSession();
} else if (connects > 4) {
connects = 4;
}
msSendCall = msWait = 0;
connect(&timeouter, SIGNAL(timeout()), this, SLOT(checkRequestsByTimer()));
timeouter.start(1000);
connect(&sender, SIGNAL(timeout()), this, SIGNAL(needToSend()));
connect(this, SIGNAL(startSendTimer(int)), &sender, SLOT(start(int)));
connect(this, SIGNAL(stopSendTimer()), &sender, SLOT(stop()));
connect(this, SIGNAL(needToSendAsync()), this, SIGNAL(needToSend()));
sender.setSingleShot(true);
MTProtoDCMap &dcs(mtpDCMap());
connections.reserve(connects);
for (uint32 i = 0; i < connects; ++i) {
connections.push_back(new MTProtoConnection());
dcId = connections.back()->start(&data, dcenter);
if (!dcId) {
for (MTProtoConnections::const_iterator j = connections.cbegin(), e = connections.cend(); j != e; ++j) {
delete *j;
}
connections.clear();
DEBUG_LOG(("Session Info: could not start connection %1 to dc %2").arg(i).arg(dcenter));
return;
}
if (!dc) {
dcenter = dcId;
MTProtoDCMap::const_iterator dcIndex = dcs.constFind(dcId % _mtp_internal::dcShift);
if (dcIndex == dcs.cend()) {
dc = MTProtoDCPtr(new MTProtoDC(dcId % _mtp_internal::dcShift, mtpAuthKeyPtr()));
dcs.insert(dcId % _mtp_internal::dcShift, dc);
} else {
dc = dcIndex.value();
}
ReadLockerAttempt lock(keyMutex());
data.setKey(lock ? dc->getKey() : mtpAuthKeyPtr(0));
connect(dc.data(), SIGNAL(authKeyCreated()), this, SLOT(authKeyCreatedForDC()));
}
}
}
void MTProtoSession::restart() {
for (MTProtoConnections::const_iterator i = connections.cbegin(), e = connections.cend(); i != e; ++i) {
(*i)->restart();
}
}
void MTProtoSession::stop() {
while (connections.size()) {
connections.back()->stop();
connections.pop_back();
}
}
void MTProtoSession::checkRequestsByTimer() {
MTPMsgsStateReq stateRequest(MTP_msgs_state_req(MTP_vector<MTPlong>(0)));
QVector<MTPlong> &stateRequestIds(stateRequest._msgs_state_req().vmsg_ids._vector().v);
QVector<mtpMsgId> resendingIds;
QVector<mtpMsgId> removingIds; // remove very old (10 minutes) containers and resend requests
{
QReadLocker locker(data.haveSentMutex());
mtpRequestMap &haveSent(data.haveSentMap());
uint32 haveSentCount(haveSent.size());
uint64 ms = getms();
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(MTP_long(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(logVectorLong(stateRequestIds)));
send(stateRequest, RPCResponseHandler(), MTPCheckResendWaiting);
}
for (uint32 i = 0, l = resendingIds.size(); i < l; ++i) {
DEBUG_LOG(("MTP Info: resending request %1").arg(resendingIds[i]));
resend(resendingIds[i], MTPCheckResendWaiting);
}
uint32 removingIdsCount = removingIds.size();
if (removingIdsCount) {
RPCCallbackClears clearCallbacks;
{
QWriteLocker locker(data.haveSentMutex());
mtpRequestMap &haveSent(data.haveSentMap());
for (uint32 i = 0; i < removingIdsCount; ++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);
}
}
}
_mtp_internal::clearCallbacksDelayed(clearCallbacks);
}
}
void MTProtoSession::onConnectionStateChange(qint32 newState) {
_mtp_internal::onStateChange(dcId, newState);
}
void MTProtoSession::cancel(mtpRequestId requestId) {
QWriteLocker locker(data.toSendMutex());
mtpPreRequestMap &toSend(data.toSendMap());
mtpPreRequestMap::iterator i = toSend.find(requestId);
if (i != toSend.end()) toSend.erase(i);
}
int32 MTProtoSession::requestState(mtpRequestId requestId) const {
MTProtoConnections::const_iterator j = connections.cbegin(), e = connections.cend();
int32 result = MTP::RequestSent;
for (; j != e; ++j) {
int32 s = (*j)->state();
if (s == MTProtoConnection::Connected) {
break;
} else if (s == MTProtoConnection::Connecting || s == MTProtoConnection::Disconnected) {
if (result < 0 || result == MTP::RequestSent) {
result = MTP::RequestConnecting;
}
} else if (s < 0) {
if ((result < 0 && s > result) || result == MTP::RequestSent) {
result = s;
}
}
}
if (j == e) { // no one is 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 MTProtoSession::getState() const {
MTProtoConnections::const_iterator j = connections.cbegin(), e = connections.cend();
int32 result = -86400000;
for (; j != e; ++j) {
int32 s = (*j)->state();
if (s == MTProtoConnection::Connected) {
return s;
} else if (s == MTProtoConnection::Connecting || s == MTProtoConnection::Disconnected) {
if (result < 0) {
return s;
}
} else if (s < 0) {
if (result < 0 && s > result) {
result = s;
}
}
}
if (result == -86400000) {
result = MTProtoConnection::Disconnected;
}
return result;
}
QString MTProtoSession::transport() const {
MTProtoConnections::const_iterator j = connections.cbegin(), e = connections.cend();
for (; j != e; ++j) {
QString s = (*j)->transport();
if (!s.isEmpty()) return s;
}
return QString();
}
mtpRequestId MTProtoSession::resend(mtpMsgId msgId, uint64 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(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();
sendPrepared(request, msCanWait, false);
{
QWriteLocker locker(data.toResendMutex());
data.toResendMap().insert(msgId, request->requestId);
}
return request->requestId;
} else {
return 0;
}
}
void MTProtoSession::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);
}
}
void MTProtoSession::sendPrepared(const mtpRequest &request, uint64 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));
uint64 ms = getms();
if (msSendCall) {
if (ms > msSendCall + msWait) {
msWait = 0;
} else {
msWait = (msSendCall + msWait) - ms;
if (msWait > msCanWait) {
msWait = msCanWait;
}
}
} else {
msWait = msCanWait;
}
if (msWait) {
msSendCall = ms;
emit startSendTimer(msWait);
DEBUG_LOG(("MTP Info: can wait for %1ms from current %2").arg(msWait).arg(msSendCall));
} else {
emit stopSendTimer();
msSendCall = 0;
emit needToSendAsync();
}
}
void MTProtoSession::sendPreparedWithInit(const mtpRequest &request, uint64 msCanWait) { // returns true, if emit of needToSend() is needed
if (request->size() > 8 && request->at(8) == mtpc_initConnection) {
sendPrepared(request, msCanWait, false);
return;
}
MTPInitConnection<mtpRequest> requestWrap(MTPinitConnection<mtpRequest>(MTP_int(ApiId), MTP_string(cApiDeviceModel()), MTP_string(cApiSystemVersion()), MTP_string(cApiAppVersion()), MTP_string(ApiLang), request));
uint32 requestSize = requestWrap.size() >> 2;
mtpRequest reqSerialized(mtpRequestData::prepare(requestSize));
requestWrap.write(*reqSerialized);
reqSerialized->msDate = getms(); // > 0 - can send without container
_mtp_internal::replaceRequest(reqSerialized, request);
sendPrepared(reqSerialized, msCanWait);
}
QReadWriteLock *MTProtoSession::keyMutex() const {
return dc->keyMutex();
}
void MTProtoSession::authKeyCreatedForDC() {
DEBUG_LOG(("AuthKey Info: MTProtoSession::authKeyCreatedForDC slot, emitting authKeyCreated(), dc %1").arg(dcId));
data.setKey(dc->getKey());
emit authKeyCreated();
}
void MTProtoSession::keyCreated(const mtpAuthKeyPtr &key) {
DEBUG_LOG(("AuthKey Info: MTProtoSession::keyCreated(), setting, dc %1").arg(dcId));
dc->setKey(key);
}
void MTProtoSession::destroyKey() {
if (!dc) return;
if (data.getKey()) {
DEBUG_LOG(("MTP Info: destroying auth_key for dc %1").arg(dcId));
if (data.getKey() == dc->getKey()) {
dc->destroyKey();
}
data.setKey(mtpAuthKeyPtr(0));
}
}
int32 MTProtoSession::getDC() const {
return dcId;
}
void MTProtoSession::tryToReceive() {
while (true) {
mtpRequestId requestId;
mtpResponse response;
{
QWriteLocker locker(data.haveReceivedMutex());
mtpResponseMap &responses(data.haveReceivedMap());
mtpResponseMap::iterator i = responses.begin();
if (i == responses.end()) return;
requestId = i.key();
response = i.value();
responses.erase(i);
}
if (requestId <= 0) {
_mtp_internal::globalCallback(response.constData(), response.constData() + response.size());
} else {
_mtp_internal::execCallback(requestId, response.constData(), response.constData() + response.size());
}
}
}
MTProtoSession::~MTProtoSession() {
for (MTProtoConnections::const_iterator i = connections.cbegin(), e = connections.cend(); i != e; ++i) {
delete *i;
}
}
MTPrpcError rpcClientError(const QString &type, const QString &description) {
return MTP_rpc_error(MTP_int(0), MTP_string(("CLIENT_" + type + (description.length() ? (": " + description) : "")).toUtf8().constData()));
}