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 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();
}
}
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;
}
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;
}