void CDatagrams::onQA(CEndPoint& addr, G2Packet* pPacket)
{
hostCache.m_pSection.lock();
CHostCacheHost* pHost = hostCache.add( addr, common::getTNowUTC() );
if ( pHost )
{
pHost->m_tAck = 0;
}
hostCache.m_pSection.unlock();
QUuid oGuid;
// Hubs are only supposed to route UDP /QA - we'll drop it if we're in leaf mode
if ( SearchManager.onQueryAcknowledge( pPacket, addr, oGuid ) && Neighbours.isG2Hub() )
{
// Add from address
G2Packet* pFR = G2Packet::newPacket( "FR" );
pFR->writeHostAddress( &addr );
pPacket->addOrReplaceChild( "FR", pFR );
Network.m_pSection.lock();
Network.routePacket( oGuid, pPacket, true, false );
Network.m_pSection.unlock();
}
}
G2Packet* Query::toG2Packet( EndPoint* pAddr, quint32 nKey )
{
G2Packet* pPacket = G2Packet::newPacket( "Q2", true );
//bool bWantURL = true;
bool bWantDN = ( !m_sDescriptiveName.isEmpty() );
bool bWantMD = !m_sMetadata.isEmpty();
//bool bWantPFS = true;
if ( pAddr )
{
G2Packet* pUDP = pPacket->writePacket( "UDP", 10 );
pUDP->writeHostAddress( *pAddr );
pUDP->writeIntLE( nKey );
}
if ( bWantDN )
{
pPacket->writePacket( "DN", m_sDescriptiveName.toUtf8().size() )->writeString( m_sDescriptiveName, false );
}
if ( bWantMD )
{
pPacket->writePacket( "MD", m_sMetadata.toUtf8().size() )->writeString( m_sMetadata, false );
}
for ( quint8 i = 0, nSize = m_vHashes.size(); i < nSize; ++i )
{
if ( m_vHashes[i] )
{
pPacket->writePacket( "URN", m_vHashes[i]->getFamilyName().size() + Hash::byteCount( m_vHashes[i]->algorithm() ) + 1 );
pPacket->writeString( m_vHashes[i]->getFamilyName() + "\0" + m_vHashes[i]->rawValue(), false );
}
}
/*if( m_nMinimumSize > 0 && m_nMaximumSize < 0xFFFFFFFFFFFFFFFF )
{
G2Packet* pSZR = pPacket->WriteChild("SZR");
pSZR->writeIntLE(m_nMinimumSize);
pSZR->writeIntLE(m_nMaximumSize);
}
else if( m_nMinimumSize > 0 )
{
G2Packet* pSZR = pPacket->WriteChild("SZR");
pSZR->writeIntLE(m_nMinimumSize);
pSZR->writeIntLE(0xFFFFFFFFFFFFFFFF);
}
else if( m_nMaximumSize < 0xFFFFFFFFFFFFFFFF )
{
G2Packet* pSZR = pPacket->WriteChild("SZR");
pSZR->writeIntLE(0);
pSZR->writeIntLE(m_nMaximumSize);
}
if( bWantURL || bWantDN || bWantMD || bWantPFS )
{
G2Packet* pInt = pPacket->WriteChild("I");
if( bWantURL )
pInt->writeString("URL", true);
if( bWantDN )
pInt->writeString("DN", true);
if( bWantMD )
pInt->writeString("MD", true);
if( bWantPFS )
pInt->writeString("PFS", true);
}*/
pPacket->writeByte( 0 );
pPacket->writeGUID( m_oGUID );
return pPacket;
}
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::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::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
}
