void CG2Node::OnRead()
{
if( !Network.m_pSection.tryLock(50) )
{
emit readyRead(); // it is a queued connection, lets requeue the missed signal
return;
}
//qDebug() << "CG2Node::OnRead";
if( m_nState == nsHandshaking )
{
if( peek(bytesAvailable()).indexOf("\r\n\r\n") != -1 )
{
if( m_bInitiated )
{
ParseOutgoingHandshake();
}
else
{
ParseIncomingHandshake();
}
}
}
else if ( m_nState == nsConnected )
{
G2Packet* pPacket = 0;
try
{
while( (pPacket = G2Packet::ReadBuffer(GetInputBuffer())) )
{
m_tLastPacketIn = time(0);
m_nPacketsIn++;
OnPacket(pPacket);
pPacket->Release();
}
}
catch(...)
{
if( pPacket )
{
qDebug() << pPacket->ToHex() << "\n" << pPacket->ToASCII();
pPacket->Release();
}
qDebug() << "Packet error - " << m_oAddress.toString().toAscii();
m_nState = nsClosing;
emit NodeStateChanged();
deleteLater();
}
}
Network.m_pSection.unlock();
}
void CG2Node::FlushSendQueue(bool bFullFlush)
{
QByteArray* pOutput = GetOutputBuffer();
while( bytesToWrite() == 0 && m_lSendQueue.size() )
{
while( pOutput->size() < 4096 && m_lSendQueue.size() )
{
G2Packet* pPacket = m_lSendQueue.dequeue();
pPacket->ToBuffer(pOutput);
pPacket->Release();
}
emit readyToTransfer();
}
if( bFullFlush )
{
if( m_bCompressedOutput && pOutput->size() )
m_bOutputPending = true;
}
if( pOutput->size() )
emit readyToTransfer();
}
void CChatSessionG2::OnRead()
{
if( m_nState == csHandshaking )
{
if(Peek(bytesAvailable()).indexOf("\r\n\r\n") != -1)
{
if(m_bInitiated)
{
ParseOutgoingHandshake();
}
else
{
//ParseIncomingHandshake();
}
}
}
else if( m_nState == csConnected || m_nState == csActive )
{
G2Packet* pPacket = 0;
try
{
while((pPacket = G2Packet::ReadBuffer(GetInputBuffer())))
{
OnPacket(pPacket);
pPacket->Release();
}
}
catch(...)
{
if(pPacket)
{
pPacket->Release();
}
emit systemMessage("Received corrupted G2 packet, connection lost.");
CNetworkConnection::Close();
}
m_bReadyReadSent = false;
}
}
void CNetwork::DispatchKHL()
{
QMutexLocker l(&Neighbours.m_pSection);
if(Neighbours.m_lNodes.isEmpty())
{
return;
}
G2Packet* pKHL = G2Packet::New("KHL");
quint32 ts = time(0);
pKHL->WritePacket("TS", 4)->WriteIntLE(ts);
for(QList<CNeighbour*>::iterator itNode = Neighbours.begin(); itNode != Neighbours.end(); ++itNode)
{
CNeighbour* pNode = *itNode;
if( pNode->m_nProtocol != dpGnutella2 )
continue;
if(((CG2Node*)pNode)->m_nType == G2_HUB && pNode->m_nState == nsConnected)
{
pKHL->WritePacket("NH", 6)->WriteHostAddress(&pNode->m_oAddress);
}
}
quint32 nCount = 0;
for(; nCount < (quint32)quazaaSettings.Gnutella2.KHLHubCount && HostCache.size() > nCount; nCount++)
{
pKHL->WritePacket("CH", 10)->WriteHostAddress(&HostCache.m_lHosts.at(nCount)->m_oAddress);
pKHL->WriteIntLE(&HostCache.m_lHosts.at(nCount)->m_tTimestamp);
}
for(QList<CNeighbour*>::iterator itNode = Neighbours.begin(); itNode != Neighbours.end(); ++itNode)
{
CNeighbour* pNode = *itNode;
if( pNode->m_nProtocol != dpGnutella2 )
continue;
if(pNode->m_nState == nsConnected)
{
((CG2Node*)pNode)->SendPacket(pKHL, false, false);
}
}
pKHL->Release();
}
void CChatSessionG2::SendMessage(QString sMessage, bool bAction)
{
qDebug() << "Send message:" << sMessage << bAction;
G2Packet* pPacket = G2Packet::New("CMSG", true);
if( bAction )
pPacket->WritePacket("ACT", 0);
G2Packet* pBody = G2Packet::New("BODY");
pBody->WriteString(sMessage);
pPacket->WritePacket(pBody);
pBody->Release();
SendPacket(pPacket);
}
void CG2Node::OnQKR(G2Packet *pPacket)
{
if( !pPacket->m_bCompound || m_nType != G2_LEAF )
return;
char szType[9];
quint32 nLength = 0, nNext = 0;
bool bCacheOK = true;
IPv4_ENDPOINT addr;
while( pPacket->ReadPacket(&szType[0], nLength) )
{
nNext = pPacket->m_nPosition + nLength;
if( strcmp("QNA", szType) == 0 && nLength >= 6 )
{
pPacket->ReadHostAddress(&addr);
}
else if( strcmp("REF", szType) == 0 )
{
bCacheOK = false;
}
pPacket->m_nPosition = nNext;
}
if( addr.ip == 0 || addr.port == 0 ) // TODO: sprawdzene czy adres jest za fw
return;
CHostCacheHost* pHost = bCacheOK ? HostCache.Find(addr) : 0;
if( pHost != 0 && pHost->m_nQueryKey != 0 && pHost->m_nKeyHost == Network.m_oAddress.ip && time(0) - pHost->m_nKeyTime < quazaaSettings.Gnutella2.QueryKeyTime )
{
G2Packet* pQKA = G2Packet::New("QKA", true);
pQKA->WritePacket("QNA", 6)->WriteHostAddress(&addr);
pQKA->WritePacket("QK", 4)->WriteIntBE(pHost->m_nQueryKey);
pQKA->WritePacket("CACHED", 0);
SendPacket(pQKA, true, true);
}
else
{
G2Packet* pQKR = G2Packet::New("QKR", true);
pQKR->WritePacket("SNA", 6)->WriteHostAddress(&m_oAddress);
Datagrams.SendPacket(addr, pQKR, false);
pQKR->Release();
}
}
void CG2Node::OnPing(G2Packet* pPacket)
{
bool bUdp = false;
bool bRelay = false;
bool bTestFirewall = false;
IPv4_ENDPOINT 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("UDP", szType) == 0 && nLength >= 6)
{
pPacket->ReadHostAddress(&addr);
if( addr.ip != 0 && addr.port != 0)
bUdp = true;
}
else if( strcmp("RELAY", szType) == 0 )
{
bRelay = true;
}
else if( strcmp("TFW", szType) == 0 )
{
bTestFirewall = true;
}
pPacket->m_nPosition = nNext;
}
}
if( !bUdp && !bRelay )
{
// direct ping
G2Packet* pPong = G2Packet::New("PO", false);
SendPacket(pPong, false, true);
return;
}
if( bUdp && !bRelay )
{
// /PI/UDP
if( Network.isHub() )
{
char* pRelay = pPacket->WriteGetPointer(7, 0);
*pRelay++ = 0x60;
*pRelay++ = 0;
*pRelay++ = 'R'; *pRelay++ = 'E'; *pRelay++ = 'L';
*pRelay++ = 'A'; *pRelay++ = 'Y';
QList<CG2Node*> lToRelay;
for( int i = 0; i < Network.m_lNodes.size(); i++ )
{
if( Network.m_lNodes.at(i)->m_nState == nsConnected )
lToRelay.append(Network.m_lNodes[i]);
}
for( int nCount = 0; nCount < quazaaSettings.Gnutella2.PingRelayLimit && lToRelay.size(); nCount++ )
{
int nIndex = qrand() % lToRelay.size();
pPacket->AddRef();
CG2Node* pNode = lToRelay.at(nIndex);
pNode->SendPacket(pPacket, true, true);
lToRelay.removeAt(nIndex);
}
return;
}
}
if( bUdp && bRelay )
{
G2Packet* pPong = G2Packet::New("PO", true);
pPong->WritePacket("RELAY", 0);
Datagrams.SendPacket(addr, pPong, true);
pPong->Release();
}
}
