////////////////////////////////////////////////////
// handle a new packet on the stream
void EQPacketStream::handlePacket(EQUDPIPPacketFormat& packet)
{
emit numPacket(++m_packetCount, (int)m_streamid);
// Only accept packets if we've been initialized unless they are
// initialization packets!
if (packet.getNetOpCode() != OP_SessionRequest &&
packet.getNetOpCode() != OP_SessionResponse &&
! m_sessionKey)
{
#if (defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)) || defined(PACKET_SESSION_DIAG)
seqDebug("discarding packet %s:%d ==>%s:%d netopcode=%04x size=%d. Session not initialized. Need to zone to start picking up packets. Session tracking %s.",
(const char*)packet.getIPv4SourceA(), packet.getSourcePort(),
(const char*)packet.getIPv4DestA(), packet.getDestPort(),
packet.getNetOpCode(), packet.payloadLength(),
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
return;
}
emit rawPacket(packet.payload(), packet.payloadLength(), m_dir,
packet.getNetOpCode());
processPacket(packet, false); // false = isn't subpacket
// if the cache isn't empty, then process it.
if (!m_cache.empty())
processCache();
}
////////////////////////////////////////////////////
// handle a new packet on the stream
void EQPacketStream::handlePacket(EQUDPIPPacketFormat& packet)
{
emit numPacket(++m_packetCount, (int)m_streamid);
if (!packet.isARQ()) // process packets that don't have an arq sequence
{
// we only handle packets with opcodes
if (packet.payloadLength() < 2)
return;
// process the packets payload immediately
processPayload(packet.payload(), packet.payloadLength());
}
else if (packet.isARQ()) // process ARQ sequences
{
uint16_t arqSeq = packet.arq();
emit seqReceive(arqSeq, (int)m_streamid);
/* this conditions should only be met once per zone/world, New Sequence */
if (packet.isSEQStart() && !packet.isClosingLo() &&
(m_session_tracking_enabled < 2))
{
#ifdef PACKET_PROCESS_DIAG
seqDebug("EQPacket: SEQStart found, setting arq seq, %04x stream %s",
arqSeq, EQStreamStr[m_streamid]);
#endif
initDecode();
// hey, a SEQStart, use it's packet to set ARQ
m_arqSeqExp = arqSeq;
m_arqSeqFound = true;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
if ((m_streamid == zone2client) && m_session_tracking_enabled)
{
m_session_tracking_enabled = 2;
emit lockOnClient(packet.getSourcePort(),
packet.getDestPort());
// notify that the client port has been latched
emit sessionTrackingChanged(m_session_tracking_enabled);
}
}
else if (!m_arqSeqFound && m_session_tracking_enabled == 0 &&
!packet.isClosingHi() && !packet.isClosingLo() &&
(m_streamid == zone2client))
{
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: new sequence found, setting arq seq, %04x stream %s",
arqSeq, EQStreamStr[m_streamid]);
#endif
m_arqSeqExp = arqSeq;
m_arqSeqFound = true;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
}
// is this the currently expected sequence, if so, do something with it.
if (m_arqSeqExp == arqSeq)
{
m_arqSeqExp = arqSeq + 1;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: Found next arq in data stream %s, incrementing arq seq, %04x",
EQStreamStr[m_streamid], arqSeq);
#endif
if (!packet.isASQ() && !packet.isFragment() && !packet.isClosingHi())
{
// seems to be a sort of ping from client to server, has ARQ
// but no ASQ, Flags look like 0x0201 (network byte order)
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: ARQ without ASQ from stream %s arq 0x%04x",
EQStreamStr[m_streamid], arqSeq);
#endif
}
// since the servers do not care about client closing sequences, we won't either
// Hey clients have rights too, or not!
else if (packet.isClosingHi() && packet.isClosingLo() &&
(m_streamid == zone2client))
{
if (m_session_tracking_enabled)
m_session_tracking_enabled = 1;
emit closing();
return;
} // if the packet is a fragment do appropriate processing
else if (packet.isFragment())
processFragment(packet);
else if (packet.payloadLength() >= 2) // has to have an opcode
processPayload(packet.payload(), packet.payloadLength());
} // it's a packet from the future, add it to the cache
else if ( ( (arqSeq > m_arqSeqExp) &&
(arqSeq < (uint32_t(m_arqSeqExp + arqSeqWrapCutoff))) ) ||
(arqSeq < (int32_t(m_arqSeqExp) - arqSeqWrapCutoff)) )
{
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: out of order arq %04x stream %s, sending to cache, %04d",
arqSeq, EQStreamStr[m_streamid], m_cache.size());
#endif
setCache(arqSeq, packet);
}
// if the cache isn't empty, then check for the expected ARQ sequence
if (!m_cache.empty())
processCache();
} /* end ARQ processing */
}
