bool CNetwork::RoutePacket(QUuid& pTargetGUID, G2Packet* pPacket)
{
CG2Node* pNode = 0;
CEndPoint pAddr;
if(m_oRoutingTable.Find(pTargetGUID, &pNode, &pAddr))
{
if(pNode)
{
pNode->SendPacket(pPacket, true, false);
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 routed to neighbour: %3").arg(pTargetGUID.toString()).arg(pPacket->GetType()).arg(pNode->m_oAddress.toString().toAscii().constData()));
//qDebug() << "CNetwork::RoutePacket " << pTargetGUID.toString() << " Packet: " << pPacket->GetType() << " routed to neighbour: " << pNode->m_oAddress.toString().toAscii().constData();
return true;
}
else if(!pAddr.isNull())
{
Datagrams.SendPacket(pAddr, pPacket, true);
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 routed to remote node: %3").arg(pTargetGUID.toString()).arg(pPacket->GetType()).arg(pNode->m_oAddress.toString().toAscii().constData()));
//qDebug() << "CNetwork::RoutePacket " << pTargetGUID.toString() << " Packet: " << pPacket->GetType() << " routed to remote node: " << pNode->m_oAddress.toString().toAscii().constData();
return true;
}
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket - No node and no address!"));
//qDebug() << "CNetwork::RoutePacket - weird thing, should not happen...";
}
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 DROPED!").arg(pTargetGUID.toString()).arg(pPacket->GetType()));
//qDebug() << "CNetwork::RoutePacket " << pTargetGUID.toString() << " Packet: " << pPacket->GetType() << " DROPPED!";
return false;
}
bool CNetwork::RoutePacket(G2Packet* pPacket, CG2Node* pNbr)
{
QUuid pGUID;
if(pPacket->GetTo(pGUID) && pGUID != quazaaSettings.Profile.GUID) // no i adres != moj adres
{
CG2Node* pNode = 0;
CEndPoint pAddr;
if(m_oRoutingTable.Find(pGUID, &pNode, &pAddr))
{
bool bForwardTCP = false;
bool bForwardUDP = false;
if(pNbr)
{
if(pNbr->m_nType == G2_LEAF) // if received from leaf - can forward anywhere
{
bForwardTCP = bForwardUDP = true;
}
else // if received from a hub - can be forwarded to leaf
{
if(pNode && pNode->m_nType == G2_LEAF)
{
bForwardTCP = true;
}
}
}
else // received from udp - do not forward via udp
{
bForwardTCP = true;
}
if(pNode && bForwardTCP)
{
pNode->SendPacket(pPacket, true, false);
return true;
}
else if(!pAddr.isNull() && bForwardUDP)
{
Datagrams.SendPacket(pAddr, pPacket, true);
return true;
}
// drop
}
return true;
}
return false;
}
void CDatagrams::listen()
{
QMutexLocker l(&m_pSection);
if(m_bActive)
{
systemLog.postLog(LogSeverity::Debug, QString("CDatagrams::Listen - already listening"));
return;
}
Q_ASSERT(m_pSocket == 0);
m_pSocket = new QUdpSocket(this);
CEndPoint addr = Network.getLocalAddress();
if(m_pSocket->bind(addr.port()))
{
systemLog.postLog(LogSeverity::Debug, QString("Datagrams listening on %1").arg(m_pSocket->localPort()));
m_nDiscarded = 0;
for(int i = 0; i < quazaaSettings.Gnutella2.UdpBuffers; i++)
{
m_FreeBuffer.append(new CBuffer(1024));
}
for(int i = 0; i < quazaaSettings.Gnutella2.UdpInFrames; i++)
{
m_FreeDatagramIn.append(new DatagramIn);
}
for(int i = 0; i < quazaaSettings.Gnutella2.UdpOutFrames; i++)
{
m_FreeDatagramOut.append(new DatagramOut);
}
connect(this, SIGNAL(sendQueueUpdated()), this, SLOT(flushSendCache()), Qt::QueuedConnection);
connect(m_pSocket, SIGNAL(readyRead()), this, SLOT(onDatagram()), Qt::QueuedConnection);
m_bActive = true;
}
else
{
systemLog.postLog(LogSeverity::Debug, QString("Can't bind UDP socket! UDP communication disabled!"));
disconnectNode();
}
m_bFirewalled = true;
}
bool CNetwork::routePacket(QUuid& pTargetGUID, G2Packet* pPacket, bool bLockNeighbours, bool bBuffered)
{
CG2Node* pNode = 0;
CEndPoint pAddr;
if(m_oRoutingTable.find(pTargetGUID, &pNode, &pAddr))
{
if(pNode)
{
if( bLockNeighbours )
{
Neighbours.m_pSection.lock();
}
if( Neighbours.neighbourExists(pNode) )
{
pNode->sendPacket(pPacket, bBuffered, false);
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 routed to neighbour: %3").arg(pTargetGUID.toString()).arg(pPacket->getType()).arg(pNode->m_oAddress.toString().toLocal8Bit().constData()));
}
if( bLockNeighbours )
{
Neighbours.m_pSection.unlock();
}
return true;
}
else if(pAddr.isValid())
{
Datagrams.sendPacket(pAddr, pPacket, true);
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 routed to remote node: %3").arg(pTargetGUID.toString()).arg(pPacket->getType()).arg(pAddr.toString().toLocal8Bit().constData()));
return true;
}
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket - No node and no address!"));
}
systemLog.postLog(LogSeverity::Debug, QString("CNetwork::RoutePacket %1 Packet: %2 DROPPED!").arg(pTargetGUID.toString()).arg(pPacket->getType()));
return false;
}
CHostCache::CHostCache()
{
QFile f("hostcache.dat");
if(f.exists() && f.open(QFile::ReadOnly))
{
QDataStream s(&f);
quint16 nVersion;
s >> nVersion;
CEndPoint addr;
quint32 ts;
quint16 nPort;
while(!f.atEnd())
{
s >> *(QHostAddress*)&addr >> nPort >> ts;
addr.setPort(nPort);
Add(addr, ts);
}
f.close();
}
void CDatagrams::sendPacket(CEndPoint& oAddr, G2Packet* pPacket, bool bAck, DatagramWatcher* pWatcher, void* pParam)
{
if(!m_bActive)
{
return;
}
QMutexLocker l(&m_pSection);
Q_UNUSED(pWatcher);
Q_UNUSED(pParam);
if(m_FreeDatagramOut.isEmpty())
{
systemLog.postLog(LogSeverity::Debug, QString("UDP out frames exhausted"));
if( !bAck ) // if caller does not want ACK, drop the packet here
return; // TODO: needs more testing
remove(m_SendCache.last());
}
if(m_FreeBuffer.isEmpty())
{
removeOldIn(false);
if(m_FreeBuffer.isEmpty())
{
systemLog.postLog(LogSeverity::Debug, QString("UDP out discarded, out of buffers"));
return;
}
}
DatagramOut* pDatagramOut = m_FreeDatagramOut.takeFirst();
pDatagramOut->create(oAddr, pPacket, m_nSequence++, m_FreeBuffer.takeFirst(), (bAck && (m_nInFrags > 0))); // to prevent net spam when unable to receive datagrams
m_SendCache.prepend(pDatagramOut);
m_SendCacheMap[pDatagramOut->m_nSequence] = pDatagramOut;
// TODO: Notify the listener if we have one.
#ifdef DEBUG_UDP
systemLog.postLog(LogSeverity::Debug, "UDP queued for %s seq %u parts %u", oAddr.toString().toLocal8Bit().constData(), pDatagramOut->m_nSequence, pDatagramOut->m_nCount);
#endif
//emit SendQueueUpdated();
__FlushSendCache();
}
void CNetworkConnection::ConnectTo(CEndPoint oAddress)
{
m_oAddress = oAddress;
m_bInitiated = true;
m_bConnected = false;
m_tConnected = time(0);
Q_ASSERT(m_pInput == 0);
Q_ASSERT(m_pOutput == 0);
m_pInput = new CBuffer(8192);
m_pOutput = new CBuffer(8192);
Q_ASSERT(m_pSocket == 0);
m_pSocket = new QTcpSocket();
initializeSocket();
m_pSocket->connectToHost(oAddress, oAddress.port());
}
void CDatagrams::onQKA(CEndPoint& addr, G2Packet* pPacket)
{
if ( !pPacket->m_bCompound )
{
return;
}
quint32 nKey = 0;
QHostAddress nKeyHost;
char szType[9];
quint32 nLength = 0, nNext = 0;
while(pPacket->readPacket(&szType[0], nLength))
{
nNext = pPacket->m_nPosition + nLength;
if(strcmp("QK", szType) == 0 && nLength >= 4)
{
nKey = pPacket->readIntLE<quint32>();
}
else if(strcmp("SNA", szType) == 0 && nLength >= 4)
{
if(nLength >= 16)
{
Q_IPV6ADDR ip;
pPacket->read(&ip, 16);
nKeyHost.setAddress(ip);
}
else
{
quint32 nIp = pPacket->readIntBE<quint32>();
nKeyHost.setAddress(nIp);
}
}
pPacket->m_nPosition = nNext;
}
hostCache.m_pSection.lock();
CHostCacheHost* pCache = hostCache.add( addr, common::getTNowUTC() );
if ( pCache )
{
if( !nKey ) // null QK means a hub does not want to be queried or just downgraded
{
hostCache.remove( pCache );
}
else
{
pCache->setKey( nKey );
}
}
hostCache.m_pSection.unlock();
#if LOG_QUERY_HANDLING
systemLog.postLog(LogSeverity::Debug, QString("Got a query key for %1 = 0x%2").arg(addr.toString().toLocal8Bit().constData()).arg(nKey));
//qDebug("Got a query key for %s = 0x%x", addr.toString().toLocal8Bit().constData(), nKey);
#endif // LOG_QUERY_HANDLING
if(Neighbours.isG2Hub() && !nKeyHost.isNull() && nKeyHost != ((QHostAddress)Network.m_oAddress))
{
G2Packet* pQNA = G2Packet::newPacket("QNA");
pQNA->writeHostAddress(&addr);
pPacket->prependPacket(pQNA);
Neighbours.m_pSection.lock();
CNeighbour* pNode = Neighbours.find(nKeyHost, dpG2);
if( pNode )
{
((CG2Node*)pNode)->sendPacket(pPacket, true, false);
}
Neighbours.m_pSection.unlock();
}
}
void CDatagrams::onQKR(CEndPoint& addr, G2Packet* pPacket)
{
if(!Neighbours.isG2Hub())
{
return;
}
CEndPoint oRequestedAddress = addr;
CEndPoint oSendingAddress = addr;
if(pPacket->m_bCompound)
{
char szType[9];
quint32 nLength = 0, nNext = 0;
while(pPacket->readPacket(&szType[0], nLength))
{
nNext = pPacket->m_nPosition + nLength;
if(strcmp("SNA", szType) == 0 && nLength >= 4)
{
if(nLength >= 16)
{
Q_IPV6ADDR ip;
pPacket->read(&ip, 16);
oSendingAddress.setAddress(ip);
}
else
{
quint32 nIp = pPacket->readIntBE<quint32>();
oSendingAddress.setAddress(nIp);
}
}
else if(strcmp("RNA", szType) == 0 && nLength >= 6)
{
if(nLength >= 18)
{
pPacket->readHostAddress(&oRequestedAddress, false);
}
else
{
pPacket->readHostAddress(&oRequestedAddress);
}
}
pPacket->m_nPosition = nNext;
}
}
if(!oRequestedAddress.port() || oRequestedAddress.isFirewalled())
{
return;
}
G2Packet* pAns = G2Packet::newPacket("QKA", true);
quint32 nKey = QueryKeys.create(oRequestedAddress);
pAns->writePacket("QK", 4);
pAns->writeIntLE<quint32>(nKey);
G2Packet* pSNA = G2Packet::newPacket("SNA");
pSNA->writeHostAddress(&oSendingAddress);
pAns->writePacket(pSNA);
pSNA->release();
sendPacket(oRequestedAddress, pAns, false);
pAns->release();
#if LOG_QUERY_HANDLING
systemLog.postLog(LogSeverity::Debug, "Node %s asked for a query key (0x%08x) for node %s", qPrintable(addr.toStringWithPort()), nKey, qPrintable(oRequestedAddress.toStringWithPort()));
#endif // LOG_QUERY_HANDLING
}
void CDatagrams::onQuery(CEndPoint &addr, G2Packet *pPacket)
{
CQueryPtr pQuery = CQuery::fromPacket(pPacket, &addr);
if(pQuery.isNull())
{
#if LOG_QUERY_HANDLING
qDebug() << "Received malformed query from" << qPrintable(addr.toStringWithPort());
#endif // LOG_QUERY_HANDLING
return;
}
if( !Neighbours.isG2Hub() )
{
// Stop receiving queries from others
// We are here because we just downgraded to leaf mode
// Shareaza should not retry with QK == 0
// TODO: test this
#if LOG_QUERY_HANDLING
systemLog.postLog(LogSeverity::Debug, "Sending null query key to %s because we're not a hub.", qPrintable(addr.toStringWithPort()));
#endif // LOG_QUERY_HANDLING
G2Packet* pQKA = G2Packet::newPacket("QKA", true);
pQKA->writePacket("QK", 4)->writeIntLE<quint32>(0);
if( addr != pQuery->m_oEndpoint )
{
pQKA->writePacket("SNA", (pQuery->m_oEndpoint.protocol() == QAbstractSocket::IPv6Protocol ? 18 : 6))->writeHostAddress(&pQuery->m_oEndpoint);
}
sendPacket(pQuery->m_oEndpoint, pQKA);
pQKA->release();
return;
}
if(!QueryKeys.check(pQuery->m_oEndpoint, pQuery->m_nQueryKey))
{
#if LOG_QUERY_HANDLING
systemLog.postLog(LogSeverity::Debug, "Issuing query key correction for %s.", qPrintable(addr.toStringWithPort()));
#endif // LOG_QUERY_HANDLING
G2Packet* pQKA = G2Packet::newPacket("QKA", true);
pQKA->writePacket("QK", 4)->writeIntLE<quint32>(QueryKeys.create(pQuery->m_oEndpoint));
if( addr != pQuery->m_oEndpoint )
{
pQKA->writePacket("SNA", (pQuery->m_oEndpoint.protocol() == QAbstractSocket::IPv6Protocol ? 18 : 6))->writeHostAddress(&pQuery->m_oEndpoint);
}
sendPacket(addr, pPacket);
pQKA->release();
return;
}
if( !Network.m_oRoutingTable.add(pQuery->m_oGUID, pQuery->m_oEndpoint) )
{
#if LOG_QUERY_HANDLING
qDebug() << "Query already processed, ignoring";
#endif // LOG_QUERY_HANDLING
G2Packet* pQA = Neighbours.createQueryAck(pQuery->m_oGUID, false, 0, false);
sendPacket(pQuery->m_oEndpoint, pQA, true);
pQA->release();
return;
}
#if LOG_QUERY_HANDLING
qDebug() << "Processing query from: " << qPrintable(addr.toStringWithPort());
#endif // LOG_QUERY_HANDLING
// just in case
if( pQuery->m_oEndpoint == Network.m_oAddress )
{
systemLog.postLog( LogSeverity::Error, Components::Network,
"Q2 received via UDP and return address points to us, changing return address to source %s",
qPrintable( addr.toStringWithPort() ) );
G2Packet* pUDP = G2Packet::newPacket("UDP");
pUDP->writeHostAddress(&addr);
pUDP->writeIntLE<quint32>(0);
pPacket->addOrReplaceChild("UDP", pUDP);
}
Neighbours.m_pSection.lock();
G2Packet* pQA = Neighbours.createQueryAck(pQuery->m_oGUID);
sendPacket(pQuery->m_oEndpoint, pQA, true);
pQA->release();
Neighbours.routeQuery(pQuery, pPacket);
Neighbours.m_pSection.unlock();
// local search
}
bool CSearchManager::OnQueryAcknowledge(G2Packet* pPacket, CEndPoint& addr, QUuid& oGUID)
{
if(!pPacket->m_bCompound)
{
return false;
}
pPacket->SkipCompound(); // skip children to get search GUID
if(pPacket->GetRemaining() < 16) // must be at least 16 bytes for GUID
{
return false;
}
oGUID = pPacket->ReadGUID(); // Read search GUID
QMutexLocker l(&m_pSection);
if(CManagedSearch* pSearch = Find(oGUID)) // is it our Query Ack?
{
// YES, this is ours, let's parse the packet and process it
CEndPoint oFromIp = addr;
QList<QHostAddress> lDone;
quint32 nRetryAfter = 0;
qint64 tAdjust = 0;
quint32 tNow = time(0);
quint32 nHubs = 0, nLeaves = 0, nSuggestedHubs = 0;
pPacket->m_nPosition = 0; // reset position
char szType[9];
quint32 nLength = 0, nNext = 0;
while(pPacket->ReadPacket(&szType[0], nLength))
{
nNext = pPacket->m_nPosition + nLength;
if(strcmp("D", szType) == 0 && nLength >= 4)
{
QHostAddress ha;
if( nLength >= 16 )
{
// IPv6
Q_IPV6ADDR nIP;
pPacket->Read(&nIP, 16);
ha.setAddress(nIP);
if( nLength >= 18 )
{
quint16 nPort = pPacket->ReadIntLE<quint16>();
CEndPoint a(nIP, nPort);
HostCache.Add(a, tNow);
}
if(nLength >= 20)
{
nLeaves += pPacket->ReadIntLE<quint16>();
}
}
else
{
// IPv4
quint32 nIP = pPacket->ReadIntBE<quint32>();
ha.setAddress(nIP);
if(nLength >= 6)
{
quint16 nPort = pPacket->ReadIntLE<quint16>();
CEndPoint a(nIP, nPort);
HostCache.Add(a, tNow);
}
if(nLength >= 8)
{
nLeaves += pPacket->ReadIntLE<quint16>();
}
}
lDone.append(ha);
nHubs++;
}
else if(strcmp("S", szType) == 0 && nLength >= 6)
{
CEndPoint a;
pPacket->ReadHostAddress(&a, !(nLength >= 18));
quint32 tSeen = (nLength >= (a.protocol() == 0 ? 10 : 22)) ? pPacket->ReadIntLE<quint32>() + tAdjust : tNow;
HostCache.Add(a, tSeen);
nSuggestedHubs++;
}
else if(strcmp("TS", szType) == 0 && nLength >= 4)
{
tAdjust = tNow - pPacket->ReadIntLE<quint32>();
}
else if(strcmp("RA", szType) == 0 && nLength >= 2)
{
if(nLength >= 4)
{
nRetryAfter = pPacket->ReadIntLE<quint32>();
}
else if(nLength >= 2)
{
nRetryAfter = pPacket->ReadIntLE<quint16>();
}
CHostCacheHost* pHost = HostCache.Find(oFromIp);
if(pHost)
{
pHost->m_tRetryAfter = tNow + nRetryAfter;
}
}
else if(strcmp("FR", szType) == 0 && nLength >= 4)
{
if( nLength >= 16 )
{
Q_IPV6ADDR ip;
pPacket->Read(&ip, 16);
oFromIp.setAddress(ip);
}
else
{
quint32 nFromIp = pPacket->ReadIntBE<quint32>();
oFromIp.setAddress(nFromIp);
}
}
pPacket->m_nPosition = nNext;
}
// we already know QA GUID
systemLog.postLog(LogSeverity::Debug, "Processing query acknowledge from %s (time adjust %+d seconds): %d hubs, %d leaves, %d suggested hubs, retry after %d seconds.",
addr.toString().toAscii().constData(), int(tAdjust), nHubs, nLeaves, nSuggestedHubs, nRetryAfter);
//qDebug("Processing query acknowledge from %s (time adjust %+d seconds): %d hubs, %d leaves, %d suggested hubs, retry after %d seconds.",
// addr.toString().toAscii().constData(), int(tAdjust), nHubs, nLeaves, nSuggestedHubs, nRetryAfter);
pSearch->m_nHubs += nHubs;
pSearch->m_nLeaves += nLeaves;
pSearch->OnHostAcknowledge(oFromIp, tNow);
for(int i = 0; i < lDone.size(); i++)
{
pSearch->OnHostAcknowledge(lDone[i], tNow);
}
emit pSearch->StatsUpdated();
return false;
}
// not our ack - tell caller to route it
return true;
}
