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deadlock fixed in mtpConnection

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This commit is contained in:
John Preston 2015-08-08 12:14:47 +03:00
parent 5dd8eab606
commit 3a97bfd110
2 changed files with 69 additions and 10 deletions
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74
Telegram/SourceFiles/mtproto/mtpConnection.cpp
View File

@ -1253,6 +1253,7 @@ MTProtoConnectionPrivate::MTProtoConnectionPrivate(QThread *thread, MTProtoConne
, _pingMsgId(0)
, restarted(false)
, keyId(0)
// , sessionDataMutex(QReadWriteLock::Recursive)
, sessionData(data)
, myKeyLock(false)
, authKeyData(0)
@ -1856,7 +1857,7 @@ void MTProtoConnectionPrivate::tryToSend() {
}
}
mtpRequestData::padding(toSendRequest);
sendRequest(toSendRequest, needAnyResponse);
sendRequest(toSendRequest, needAnyResponse, lockFinished);
}
void MTProtoConnectionPrivate::retryByTimer() {
@ -1971,8 +1972,11 @@ void MTProtoConnectionPrivate::restart(bool maybeBadKey) {
}
}
lockFinished.unlock();
doDisconnect();
if (_needSessionReset) {
lockFinished.relock();
if (sessionData && _needSessionReset) {
resetSession();
}
restarted = true;
@ -2089,7 +2093,12 @@ void MTProtoConnectionPrivate::onWaitIPv4Failed() {
void MTProtoConnectionPrivate::doDisconnect() {
destroyConn();
unlockKey();
{
QReadLocker lockFinished(&sessionDataMutex);
if (sessionData) {
unlockKey();
}
}
clearAuthKeyData();
@ -2113,12 +2122,16 @@ void MTProtoConnectionPrivate::handleReceived() {
DEBUG_LOG(("MTP Error: auth_key for dc %1 busy, cant lock").arg(dc));
clearMessages();
keyId = 0;
lockFinished.unlock();
return restart();
}
mtpAuthKeyPtr key(sessionData->getKey());
if (!key || key->keyId() != keyId) {
DEBUG_LOG(("MTP Error: auth_key id for dc %1 changed").arg(dc));
lockFinished.unlock();
return restart();
}
@ -2129,11 +2142,15 @@ void MTProtoConnectionPrivate::handleReceived() {
if (len < 18) { // 2 auth_key_id, 4 msg_key, 2 salt, 2 session, 2 msg_id, 1 seq_no, 1 length, (1 data + 3 padding) min
LOG(("TCP Error: bad message received, len %1").arg(len * sizeof(mtpPrime)));
TCP_LOG(("TCP Error: bad message %1").arg(mb(encrypted, len * sizeof(mtpPrime)).str()));
lockFinished.unlock();
return restart();
}
if (keyId != *(uint64*)encrypted) {
LOG(("TCP Error: bad auth_key_id %1 instead of %2 received").arg(keyId).arg(*(uint64*)encrypted));
TCP_LOG(("TCP Error: bad message %1").arg(mb(encrypted, len * sizeof(mtpPrime)).str()));
lockFinished.unlock();
return restart();
}
@ -2152,6 +2169,8 @@ void MTProtoConnectionPrivate::handleReceived() {
LOG(("TCP Error: bad msg_len received %1, data size: %2").arg(msgLen).arg(dataBuffer.size()));
TCP_LOG(("TCP Error: bad message %1").arg(mb(encrypted, len * sizeof(mtpPrime)).str()));
_conn->received().pop_front();
lockFinished.unlock();
return restart();
}
uchar sha1Buffer[20];
@ -2159,6 +2178,8 @@ void MTProtoConnectionPrivate::handleReceived() {
LOG(("TCP Error: bad SHA1 hash after aesDecrypt in message"));
TCP_LOG(("TCP Error: bad message %1").arg(mb(encrypted, len * sizeof(mtpPrime)).str()));
_conn->received().pop_front();
lockFinished.unlock();
return restart();
}
TCP_LOG(("TCP Info: decrypted message %1,%2,%3 is %4 len").arg(msgId).arg(seqNo).arg(logBool(needAck)).arg(msgLen + 8 * sizeof(mtpPrime)));
@ -2168,6 +2189,8 @@ void MTProtoConnectionPrivate::handleReceived() {
LOG(("MTP Error: bad server session received"));
TCP_LOG(("MTP Error: bad server session %1 instead of %2 in message received").arg(session).arg(serverSession));
_conn->received().pop_front();
lockFinished.unlock();
return restart();
}
@ -2177,6 +2200,8 @@ void MTProtoConnectionPrivate::handleReceived() {
bool isReply = ((msgId & 0x03) == 1);
if (!isReply && ((msgId & 0x03) != 3)) {
LOG(("MTP Error: bad msg_id %1 in message received").arg(msgId));
lockFinished.unlock();
return restart();
}
@ -2252,6 +2277,8 @@ void MTProtoConnectionPrivate::handleReceived() {
if (res < 0) {
_needSessionReset = (res < -1);
lockFinished.unlock();
return restart();
}
retryTimeout = 1; // reset restart() timer
@ -3022,6 +3049,8 @@ void MTProtoConnectionPrivate::onConnected4() {
disconnect(_conn4, SIGNAL(connected()), this, SLOT(onConnected4()));
if (!_conn4->isConnected()) {
LOG(("Connection Error: not connected in onConnected4(), state: %1").arg(_conn4->debugState()));
lockFinished.unlock();
return restart();
}
@ -3030,6 +3059,7 @@ void MTProtoConnectionPrivate::onConnected4() {
DEBUG_LOG(("MTP Info: connection through IPv4 succeed."));
lockFinished.unlock();
updateAuthKey();
}
@ -3043,6 +3073,8 @@ void MTProtoConnectionPrivate::onConnected6() {
disconnect(_conn6, SIGNAL(connected()), this, SLOT(onConnected6()));
if (!_conn6->isConnected()) {
LOG(("Connection Error: not connected in onConnected(), state: %1").arg(_conn6->debugState()));
lockFinished.unlock();
return restart();
}
@ -3121,6 +3153,7 @@ void MTProtoConnectionPrivate::updateAuthKey() {
connect(_conn, SIGNAL(receivedData()), this, SLOT(pqAnswered()));
DEBUG_LOG(("AuthKey Info: sending Req_pq.."));
lockFinished.unlock();
sendRequestNotSecure(req_pq);
}
@ -3424,6 +3457,7 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
MTPSet_client_DH_params::ResponseType res_client_DH_params;
if (!readResponseNotSecure(res_client_DH_params)) {
lockFinished.unlock();
return restart();
}
@ -3433,11 +3467,15 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnonce != authKeyData->nonce) {
LOG(("AuthKey Error: received nonce <> sent nonce (in dh_gen_ok)!"));
DEBUG_LOG(("AuthKey Error: received nonce: %1, sent nonce: %2").arg(mb(&resDH.vnonce, 16).str()).arg(mb(&authKeyData->nonce, 16).str()));
lockFinished.unlock();
return restart();
}
if (resDH.vserver_nonce != authKeyData->server_nonce) {
LOG(("AuthKey Error: received server_nonce <> sent server_nonce (in dh_gen_ok)!"));
DEBUG_LOG(("AuthKey Error: received server_nonce: %1, sent server_nonce: %2").arg(mb(&resDH.vserver_nonce, 16).str()).arg(mb(&authKeyData->server_nonce, 16).str()));
lockFinished.unlock();
return restart();
}
authKeyData->new_nonce_buf[32] = 1;
@ -3445,6 +3483,8 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnew_nonce_hash1 != *(MTPint128*)(hashSha1(authKeyData->new_nonce_buf, 41, sha1Buffer) + 1)) {
LOG(("AuthKey Error: received new_nonce_hash1 did not match!"));
DEBUG_LOG(("AuthKey Error: received new_nonce_hash1: %1, new_nonce_buf: %2").arg(mb(&resDH.vnew_nonce_hash1, 16).str()).arg(mb(authKeyData->new_nonce_buf, 41).str()));
lockFinished.unlock();
return restart();
}
@ -3467,11 +3507,15 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnonce != authKeyData->nonce) {
LOG(("AuthKey Error: received nonce <> sent nonce (in dh_gen_retry)!"));
DEBUG_LOG(("AuthKey Error: received nonce: %1, sent nonce: %2").arg(mb(&resDH.vnonce, 16).str()).arg(mb(&authKeyData->nonce, 16).str()));
lockFinished.unlock();
return restart();
}
if (resDH.vserver_nonce != authKeyData->server_nonce) {
LOG(("AuthKey Error: received server_nonce <> sent server_nonce (in dh_gen_retry)!"));
DEBUG_LOG(("AuthKey Error: received server_nonce: %1, sent server_nonce: %2").arg(mb(&resDH.vserver_nonce, 16).str()).arg(mb(&authKeyData->server_nonce, 16).str()));
lockFinished.unlock();
return restart();
}
authKeyData->new_nonce_buf[32] = 2;
@ -3479,6 +3523,8 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnew_nonce_hash2 != *(MTPint128*)(hashSha1(authKeyData->new_nonce_buf, 41, sha1Buffer) + 1)) {
LOG(("AuthKey Error: received new_nonce_hash2 did not match!"));
DEBUG_LOG(("AuthKey Error: received new_nonce_hash2: %1, new_nonce_buf: %2").arg(mb(&resDH.vnew_nonce_hash2, 16).str()).arg(mb(authKeyData->new_nonce_buf, 41).str()));
lockFinished.unlock();
return restart();
}
authKeyData->retry_id = authKeyData->auth_key_aux_hash;
@ -3489,11 +3535,15 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnonce != authKeyData->nonce) {
LOG(("AuthKey Error: received nonce <> sent nonce (in dh_gen_fail)!"));
DEBUG_LOG(("AuthKey Error: received nonce: %1, sent nonce: %2").arg(mb(&resDH.vnonce, 16).str()).arg(mb(&authKeyData->nonce, 16).str()));
lockFinished.unlock();
return restart();
}
if (resDH.vserver_nonce != authKeyData->server_nonce) {
LOG(("AuthKey Error: received server_nonce <> sent server_nonce (in dh_gen_fail)!"));
DEBUG_LOG(("AuthKey Error: received server_nonce: %1, sent server_nonce: %2").arg(mb(&resDH.vserver_nonce, 16).str()).arg(mb(&authKeyData->server_nonce, 16).str()));
lockFinished.unlock();
return restart();
}
authKeyData->new_nonce_buf[32] = 3;
@ -3501,13 +3551,20 @@ void MTProtoConnectionPrivate::dhClientParamsAnswered() {
if (resDH.vnew_nonce_hash3 != *(MTPint128*)(hashSha1(authKeyData->new_nonce_buf, 41, sha1Buffer) + 1)) {
LOG(("AuthKey Error: received new_nonce_hash3 did not match!"));
DEBUG_LOG(("AuthKey Error: received new_nonce_hash3: %1, new_nonce_buf: %2").arg(mb(&resDH.vnew_nonce_hash3, 16).str()).arg(mb(authKeyData->new_nonce_buf, 41).str()));
lockFinished.unlock();
return restart();
}
LOG(("AuthKey Error: dh_gen_fail received!"));
} return restart();
}
lockFinished.unlock();
return restart();
}
LOG(("AuthKey Error: unknown set_client_DH_params_answer received, typeId = %1").arg(res_client_DH_params.type()));
lockFinished.unlock();
return restart();
}
@ -3646,7 +3703,7 @@ bool MTProtoConnectionPrivate::readResponseNotSecure(TResponse &response) {
return true;
}
bool MTProtoConnectionPrivate::sendRequest(mtpRequest &request, bool needAnyResponse) {
bool MTProtoConnectionPrivate::sendRequest(mtpRequest &request, bool needAnyResponse, QReadLocker &lockFinished) {
uint32 fullSize = request->size();
if (fullSize < 9) return false;
@ -3656,6 +3713,8 @@ bool MTProtoConnectionPrivate::sendRequest(mtpRequest &request, bool needAnyResp
ReadLockerAttempt lock(sessionData->keyMutex());
if (!lock) {
DEBUG_LOG(("MTP Info: could not lock key for read in sendBuffer(), dc %1, restarting..").arg(dc));
lockFinished.unlock();
restart();
return false;
}
@ -3663,6 +3722,8 @@ bool MTProtoConnectionPrivate::sendRequest(mtpRequest &request, bool needAnyResp
mtpAuthKeyPtr key(sessionData->getKey());
if (!key || key->keyId() != keyId) {
DEBUG_LOG(("MTP Error: auth_key id for dc %1 changed").arg(dc));
lockFinished.unlock();
restart();
return false;
}
@ -3729,9 +3790,6 @@ void MTProtoConnectionPrivate::lockKey() {
}
void MTProtoConnectionPrivate::unlockKey() {
QReadLocker lockFinished(&sessionDataMutex);
if (!sessionData) return;
if (myKeyLock) {
myKeyLock = false;
sessionData->keyMutex()->unlock();

5
Telegram/SourceFiles/mtproto/mtpConnection.h
View File

@ -410,7 +410,6 @@ public slots:
void onError4(bool maybeBadKey = false);
void onError6(bool maybeBadKey = false);
void doDisconnect();
void doFinish();
// Auth key creation packet receive slots
@ -430,6 +429,8 @@ public slots:
private:
void doDisconnect();
void createConn(bool createIPv4, bool createIPv6);
void destroyConn(MTPabstractConnection **conn = 0); // 0 - destory all
@ -437,7 +438,7 @@ private:
mtpMsgId prepareToSend(mtpRequest &request, mtpMsgId currentLastId);
mtpMsgId replaceMsgId(mtpRequest &request, mtpMsgId newId);
bool sendRequest(mtpRequest &request, bool needAnyResponse);
bool sendRequest(mtpRequest &request, bool needAnyResponse, QReadLocker &lockFinished);
mtpRequestId wasSent(mtpMsgId msgId) const;
int32 handleOneReceived(const mtpPrime *from, const mtpPrime *end, uint64 msgId, int32 serverTime, uint64 serverSalt, bool badTime);