void CDatagrams::onPing(CEndPoint& addr, G2Packet* pPacket)
{
Q_UNUSED(pPacket);
G2Packet* pNew = G2Packet::newPacket("PO", false);
sendPacket(addr, pNew, false);
pNew->release();
}
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::onCRAWLR(CEndPoint& addr, G2Packet* pPacket)
{
QMutexLocker l2(&Neighbours.m_pSection);
// bool bRLeaf = false;
// bool bRNick = false;
// bool bRGPS = false;
// bool bRExt = false;
if(!pPacket->m_bCompound)
{
return;
}
char szType[9];
quint32 nLength = 0, nNext = 0;
while(pPacket->readPacket(&szType[0], nLength))
{
nNext = pPacket->m_nPosition + nLength;
if(strcmp("RLEAF", szType) == 0)
{
// bRLeaf = true;
}
else if(strcmp("RNAME", szType) == 0)
{
// bRNick = true;
}
else if(strcmp("RGPS", szType) == 0)
{
// bRGPS = true;
}
else if(strcmp("REXT", szType) == 0)
{
// bRExt = true;
}
pPacket->m_nPosition = nNext;
}
G2Packet* pCA = G2Packet::newPacket("CRAWLA", true);
G2Packet* pTmp = G2Packet::newPacket("SELF", true);
if(Neighbours.isG2Hub())
{
pTmp->writePacket("HUB", 0);
}
else
{
pTmp->writePacket("LEAF", 0);
}
pTmp->writePacket("NA", ((Network.m_oAddress.protocol() == 0) ? 6 : 18))->writeHostAddress(&Network.m_oAddress);
pTmp->writePacket("CV", CQuazaaGlobals::USER_AGENT_STRING().toUtf8().size())->writeString(CQuazaaGlobals::USER_AGENT_STRING(), false);
pTmp->writePacket("V", 4)->writeString(CQuazaaGlobals::VENDOR_CODE(), false);;
quint16 nLeaves = Neighbours.m_nLeavesConnectedG2;
pTmp->writePacket("HS", 2)->writeIntLE(nLeaves);
if(!quazaaSettings.Profile.GnutellaScreenName.isEmpty())
{
pTmp->writePacket("NAME", quazaaSettings.Profile.GnutellaScreenName.left(255).toUtf8().size())->writeString(quazaaSettings.Profile.GnutellaScreenName.left(255));
}
pCA->writePacket(pTmp);
pTmp->release();
for(QList<CNeighbour*>::iterator itNode = Neighbours.begin(); itNode != Neighbours.end(); ++itNode)
{
if((*itNode)->m_nProtocol != dpG2)
{
continue;
}
CG2Node* pNode = (CG2Node*) * itNode;
if(pNode->m_nState == nsConnected)
{
if(pNode->m_nType == G2_HUB)
{
G2Packet* pNH = G2Packet::newPacket("NH");
pNH->writePacket("NA", ((pNode->m_oAddress.protocol() == 0) ? 6 : 18))->writeHostAddress(&pNode->m_oAddress);
pNH->writePacket("HS", 2)->writeIntLE(pNode->m_nLeafCount);
pCA->writePacket(pNH);
pNH->release();
}
else if(pNode->m_nType == G2_LEAF)
{
G2Packet* pNL = G2Packet::newPacket("NL");
pNL->writePacket("NA", ((pNode->m_oAddress.protocol() == 0) ? 6 : 18))->writeHostAddress(&pNode->m_oAddress);
pCA->writePacket(pNL);
pNL->release();
}
}
}
sendPacket(addr, pCA, true);
pCA->release();
}
void CDatagrams::onReceiveGND()
{
GND_HEADER* pHeader = (GND_HEADER*)m_pRecvBuffer->data();
QHostAddress nIp = *m_pHostAddress;
quint32 nSeq = ((pHeader->nSequence << 16) & 0xFFFF0000) + (m_nPort & 0x0000FFFF);
#ifdef DEBUG_UDP
systemLog.postLog(LogSeverity::Debug, "Received GND from %s:%u nSequence = %u nPart = %u nCount = %u", m_pHostAddress->toString().toLocal8Bit().constData(), m_nPort, pHeader->nSequence, pHeader->nPart, pHeader->nCount);
#endif
DatagramIn* pDatagramIn = 0;
if(m_RecvCache.contains(nIp) && m_RecvCache[nIp].contains(nSeq))
{
pDatagramIn = m_RecvCache[nIp][nSeq];
// To give a chance for bigger packages ;)
if(pDatagramIn->m_nLeft)
{
pDatagramIn->m_tStarted = time(0);
}
}
else
{
QMutexLocker l(&m_pSection);
if(!m_FreeDatagramIn.isEmpty())
{
pDatagramIn = m_FreeDatagramIn.takeFirst();
}
else
{
if(m_FreeDatagramIn.isEmpty())
{
removeOldIn(true);
if(m_FreeDatagramIn.isEmpty())
{
#ifdef DEBUG_UDP
systemLog.postLog(LogSeverity::Debug, QString("UDP in frames exhausted"));
#endif
m_nDiscarded++;
return;
}
}
pDatagramIn = m_FreeDatagramIn.takeFirst();
}
if(m_FreeBuffer.size() < pHeader->nCount)
{
m_nDiscarded++;
m_FreeDatagramIn.append(pDatagramIn);
removeOldIn(false);
return;
}
pDatagramIn->create(CEndPoint(*m_pHostAddress, m_nPort), pHeader->nFlags, pHeader->nSequence, pHeader->nCount);
for(int i = 0; i < pHeader->nCount; i++)
{
Q_ASSERT(pDatagramIn->m_pBuffer[i] == 0);
pDatagramIn->m_pBuffer[i] = m_FreeBuffer.takeFirst();
}
m_RecvCache[nIp][nSeq] = pDatagramIn;
m_RecvCacheTime.prepend(pDatagramIn);
}
// It is here, in case if we did not have free datagrams
// ACK = I've received a datagram, and if you have received and rejected it, do not send ACK-a
if(pHeader->nFlags & 0x02)
{
GND_HEADER* pAck = new GND_HEADER;
memcpy(pAck, pHeader, sizeof(GND_HEADER));
pAck->nCount = 0;
pAck->nFlags = 0;
#ifdef DEBUG_UDP
systemLog.postLog(LogSeverity::Debug, "Sending UDP ACK to %s:%u", m_pHostAddress->toString().toLocal8Bit().constData(), m_nPort);
#endif
//m_pSocket->writeDatagram((char*)&oAck, sizeof(GND_HEADER), *m_pHostAddress, m_nPort);
//m_mOutput.Add(sizeof(GND_HEADER));
m_AckCache.append(qMakePair(CEndPoint(*m_pHostAddress, m_nPort), reinterpret_cast<char*>(pAck)));
if( m_AckCache.count() == 1 )
QMetaObject::invokeMethod(this, "flushSendCache", Qt::QueuedConnection);
}
if(pDatagramIn->add(pHeader->nPart, m_pRecvBuffer->data() + sizeof(GND_HEADER), m_pRecvBuffer->size() - sizeof(GND_HEADER)))
{
G2Packet* pPacket = 0;
try
{
CEndPoint addr(*m_pHostAddress, m_nPort);
pPacket = pDatagramIn->toG2Packet();
if(pPacket)
{
onPacket(addr, pPacket);
}
}
catch(...)
{
}
if(pPacket)
{
pPacket->release();
}
m_pSection.lock();
remove(pDatagramIn, true);
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
}
