////////////////////////////////////////////////////
// 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();
}
EQUDPIPPacketFormat::EQUDPIPPacketFormat(EQUDPIPPacketFormat& packet,
bool copy)
{
// note whether or not this object ownw the memory
m_ownCopy = copy;
m_sessionKey = packet.getSessionKey();
if (copy)
{
// allocate our own copy
uint8_t* ipdata = new uint8_t[packet.m_dataLength];
// copy the data into the copy
memcpy((void*)ipdata, (void*)packet.m_ip, packet.m_dataLength);
// initialize the object
init(ipdata);
}
else
{
// just copy over the other objects data
m_dataLength = packet.m_dataLength;
m_ip = packet.m_ip;
m_udp = packet.m_udp;
}
}
////////////////////////////////////////////////////
// handle a new packet on the stream
void EQPacketStream::handlePacket(EQUDPIPPacketFormat& packet)
{
emit numPacket(++m_packetCount, (int)m_streamid);
// Packet is ours now. Logging needs to know this later on.
packet.setSessionKey(getSessionKey());
// 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) && PACKET_SESSION_DIAG > 1)
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;
}
// Only accept packets that correspond to our latched client port, if
// it is set. This helps filter out multiple sessions on the same physical
// host when two eq clients zone at the same time. The first one will win.
if (m_sessionClientPort != 0 &&
((dir() == DIR_Server && m_sessionClientPort != packet.getDestPort()) ||
(dir() == DIR_Client && m_sessionClientPort != packet.getSourcePort())))
{
#if (defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)) || (defined(PACKET_SESSION_DIAG) && PACKET_SESSION_DIAG > 1)
seqDebug("discarding packet %s:%d ==>%s:%d netopcode=%04x size=%d. Multiple sessions on the same box? Ignoring all but one of them. Latched client port %d. Session tracking %s.",
(const char*)packet.getIPv4SourceA(), packet.getSourcePort(),
(const char*)packet.getIPv4DestA(), packet.getDestPort(),
packet.getNetOpCode(), packet.payloadLength(),
m_sessionClientPort,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
return;
}
// Only accept packets that pass the EQ protocol-level CRC check. This helps
// weed out non-EQ packets that we might see.
#ifdef APPLY_CRC_CHECK
if (packet.hasCRC())
{
uint16_t calcedCRC = calculateCRC(packet);
if (calcedCRC != packet.crc())
{
seqWarn("INVALID PACKET: Bad CRC [%s:%d -> %s:%d] netOp %04x seq %04x len %d crc (%04x != %04x)",
(const char*)packet.getIPv4SourceA(), packet.getSourcePort(),
(const char*)packet.getIPv4DestA(), packet.getDestPort(),
packet.getNetOpCode(), packet.arqSeq(), packet.getUDPPayloadLength(),
packet.crc(), calcedCRC);
return;
}
}
#endif /* APPLY_CRC_CHECK */
// Decode the packet first
if (! packet.decode(m_maxLength))
{
seqWarn("Packet decode failed for stream %s (%d), op %04x, flags %02x packet dropped.",
EQStreamStr[m_streamid], m_streamid, packet.getNetOpCode(),
packet.getFlags());
return;
}
#ifdef PACKET_DECODE_DIAG
else if (packet.hasFlags())
{
seqDebug("Successful decode for stream %s (%d), op %04x, flags %02x.",
EQStreamStr[m_streamid], m_streamid, packet.getNetOpCode(),
packet.getFlags());
}
#endif
// Raw packet
emit rawPacket(packet.rawPayload(), packet.rawPayloadLength(), 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();
}
void EQPacket::dispatchPacket(EQUDPIPPacketFormat& packet)
{
// Detect client by world server port traffic...
if (m_detectingClient && packet.getSourcePort() == WorldServerGeneralPort)
{
m_ip = packet.getIPv4DestA();
m_client_addr = packet.getIPv4DestN();
m_detectingClient = false;
emit clientChanged(m_client_addr);
seqInfo("Client Detected: %s", (const char*)m_ip);
}
else if (m_detectingClient && packet.getDestPort() == WorldServerGeneralPort)
{
m_ip = packet.getIPv4SourceA();
m_client_addr = packet.getIPv4SourceN();
m_detectingClient = false;
emit clientChanged(m_client_addr);
seqInfo("Client Detected: %s", (const char*)m_ip);
}
// Dispatch based on known streams
if ((packet.getDestPort() == ChatServerPort) ||
(packet.getSourcePort() == ChatServerPort))
{
// Drop chat server traffic
return;
}
else if ((packet.getDestPort() == WorldServerChatPort) ||
(packet.getSourcePort() == WorldServerChatPort))
{
// Drop cross-server chat traffic
return;
}
else if ((packet.getDestPort() == WorldServerChat2Port) ||
(packet.getSourcePort() == WorldServerChat2Port))
{
// Drop email and cross-game chat traffic
return;
}
else if (((packet.getDestPort() >= LoginServerMinPort) &&
(packet.getDestPort() <= LoginServerMaxPort)) ||
(packet.getSourcePort() >= LoginServerMinPort) &&
(packet.getSourcePort() <= LoginServerMaxPort))
{
// Drop login server traffic
return;
}
else if (packet.getDestPort() == WorldServerGeneralPort ||
packet.getSourcePort() == WorldServerGeneralPort)
{
// World server traffic. Dispatch it.
if (packet.getIPv4SourceN() == m_client_addr)
{
m_client2WorldStream->handlePacket(packet);
}
else
{
m_world2ClientStream->handlePacket(packet);
}
}
else
{
// Anything else we assume is zone server traffic.
if (packet.getIPv4SourceN() == m_client_addr)
{
m_client2ZoneStream->handlePacket(packet);
}
else
{
m_zone2ClientStream->handlePacket(packet);
}
}
} /* end dispatchPacket() */
////////////////////////////////////////////////////
// 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 */
}
////////////////////////////////////////////////////
// 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) && PACKET_SESSION_DIAG > 1)
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;
}
// Decode the packet first
if (! packet.decode(m_maxLength))
{
seqWarn("Packet decode failed for stream %s (%d), op %04x, flags %02x packet dropped.",
EQStreamStr[m_streamid], m_streamid, packet.getNetOpCode(),
packet.getFlags());
return;
}
#ifdef PACKET_DECODE_DIAG
else if (packet.hasFlags())
{
seqDebug("Successful decode for stream %s (%d), op %04x, flags %02x.",
EQStreamStr[m_streamid], m_streamid, packet.getNetOpCode(),
packet.getFlags());
}
#endif
// Raw packet
emit rawPacket(packet.rawPayload(), packet.rawPayloadLength(), 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();
}
