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
}