uint32_t NetStream::readUInt32()
{
uint32_t val;
// make sure there is enough data left
if ((m_lastPos - m_pos) >= 4)
{
// convert the data and increment past it
val = eqntohuint32(m_pos);
m_pos += 4;
}
else
val = 0; // just return 0 if no data left
return val;
}
/////////////////////////////////////////////////////
// Handle a protocol level packet. This could be either a top-level
// EQUDPIPPacket or a subpacket that is just an EQProtocolPacket. Either way
// we use net opcodes here.
void EQPacketStream::processPacket(EQProtocolPacket& packet, bool /*isSubpacket*/)
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("-->EQPacketStream::processPacket, subpacket=%s on stream %s (%d)",
(isSubpacket ? "true" : "false"), EQStreamStr[m_streamid], m_streamid);
#endif
if (IS_APP_OPCODE(packet.getNetOpCode()))
{
// This is an app-opcode directly on the wire with no wrapping protocol
// information. Weird, but whatever gets the stream read, right?
dispatchPacket(packet.payload(), packet.payloadLength(),
packet.getNetOpCode(), m_opcodeDB.find(packet.getNetOpCode()));
return;
}
// Process the net opcode
switch (packet.getNetOpCode())
{
case OP_Combined:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: found combined packet (net op: %04x, size %d) on stream %s (%d). Unrolling.",
packet.getNetOpCode(), packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
// Rolled up multiple packets inside this packet. Need to unroll them
// and process them individually. subpacket starts after the net opcode.
uint8_t* subpacket = packet.payload();
while (subpacket < packet.payload() + packet.payloadLength())
{
// Length specified first on the wire.
uint8_t subpacketLength = subpacket[0];
// Move past the length
subpacket++;
// OpCode (in net order)
uint16_t subOpCode = *(uint16_t*)subpacket;
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Opcode is next. Net opcode or app opcode?
if (subOpCode == 0)
{
// App opcode < 0x00ff. Skip the first byte and dispatch the app
// opcode appropriately
subpacket++;
subOpCode = *(uint16_t*)subpacket;
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: processing unrolled special app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength-3, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// App opcode. Dispatch it, skipping opcode.
dispatchPacket(&subpacket[2], subpacketLength-2,
subOpCode, m_opcodeDB.find(subOpCode));
}
else if (IS_NET_OPCODE(subOpCode))
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: processing unrolled net opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Net opcode. false = copy. true = subpacket
EQProtocolPacket spacket(subpacket, subpacketLength, false, true);
processPacket(spacket, true);
}
else
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// App opcode. Dispatch it, skipping opcode.
dispatchPacket(&subpacket[2], subpacketLength-2,
subOpCode, m_opcodeDB.find(subOpCode));
}
subpacket += subpacketLength;
}
}
break;
case OP_AppCombined:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: found appcombined packet (net op: %04x, size %d) on stream %s (%d). Unrolling.",
packet.getNetOpCode(), packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
// Multiple app op codes in the same packet. Need to unroll and dispatch
// them.
uint8_t* subpacket = packet.payload();
while (subpacket < packet.payload() + packet.payloadLength())
{
// Length specified first on the wire.
uint8_t subpacketLength = subpacket[0];
// Move past the length
subpacket++;
if (subpacketLength != 0xff)
{
// Dispatch app op code using given packet length. Net order!
uint16_t subOpCode = *(uint16_t*)(subpacket);
// Handle 3 byte opcodes properly
if (subOpCode == 0)
{
// 3 byte opcode. Drop the first byte, opcode is byte 2 and 3
subpacket++;
subpacketLength--;
subOpCode = *(uint16_t*)(subpacket);
}
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Dispatch, skipping op code.
dispatchPacket(&subpacket[2], subpacketLength-2,
subOpCode, m_opcodeDB.find(subOpCode));
// Move ahead
subpacket += subpacketLength;
}
else
{
// If original length is 0xff, it means it is a long one. The length
// is 2 bytes and next.
uint16_t longOne = eqntohuint16(subpacket);
// Move past the 2 byte length
subpacket += 2;
// OpCode next. Net order for op codes.
uint16_t subOpCode = *(uint16_t*)subpacket;
// Handle 3 byte opcodes properly
if (subOpCode == 0)
{
// 3 byte opcode. Drop the first byte, opcode is byte 2 and 3
subpacket++;
longOne--;
subOpCode = *(uint16_t*)(subpacket);
}
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
longOne, EQStreamStr[m_streamid], m_streamid, subOpCode);
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
longOne-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Dispatch, skipping op code.
dispatchPacket(&subpacket[2], longOne-2,
subOpCode, m_opcodeDB.find(subOpCode));
// Move ahead
subpacket += longOne;
}
}
}
break;
case OP_Packet:
{
// Normal unfragmented sequenced packet.
uint16_t seq = packet.arqSeq();
emit seqReceive(seq, (int)m_streamid);
// Future packet?
if (seq == m_arqSeqExp)
{
// Expected packet.
m_arqSeqExp++;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
// OpCode next. Net order for op codes.
uint16_t subOpCode = *(uint16_t*)(packet.payload());
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("SEQ: Found next sequence number in data stream %s (%d), incrementing expected seq, %04x (op code %04x, sub opcode %04x)",
EQStreamStr[m_streamid], m_streamid, seq,
packet.getNetOpCode(), subOpCode);
#endif
// Opcode is next. Net opcode or app opcode?
if (subOpCode == 0)
{
// App opcode < 0x00ff. Skip the first byte and dispatch the app
// opcode appropriately
subOpCode = *(uint16_t*)&packet.payload()[1];
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("EQPacket: special app opcode extracted for opcode 0000 on stream %s (%d). Opcode %04x",
EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// App opcode. Dispatch it, skipping opcode.
dispatchPacket(&packet.payload()[3], packet.payloadLength()-3,
subOpCode, m_opcodeDB.find(subOpCode));
}
else if (IS_NET_OPCODE(subOpCode))
{
// Net opcode. false = no copy. true = subpacket.
EQProtocolPacket spacket(packet.payload(),
packet.payloadLength(), false, true);
processPacket(spacket, true);
}
else
{
// App opcode. Dispatch, skipping opcode.
dispatchPacket(&packet.payload()[2], packet.payloadLength()-2,
subOpCode, m_opcodeDB.find(subOpCode));
}
}
else if ((seq > m_arqSeqExp &&
seq < (uint32_t(m_arqSeqExp + arqSeqWrapCutoff))) ||
seq < (int32_t(m_arqSeqExp) - arqSeqWrapCutoff))
{
// Yeah, future packet. Push it on the packet cache.
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: out of order sequence %04x stream %s (%d) expecting %04x, sending to cache, %04d",
seq, EQStreamStr[m_streamid], m_streamid,
m_arqSeqExp, m_cache.size());
#endif
setCache(seq, packet);
}
else
{
#ifdef PACKET_PROCESS_DIAG
// Past packet outside the cut off
seqWarn("SEQ: received sequenced %spacket outside expected window on stream %s (%d) netopcode=%04x size=%d. Expecting seq=%04x got seq=%04x, window size %d, dropping packet as in the past.",
(isSubpacket ? "sub" : ""),
EQStreamStr[m_streamid], m_streamid,
packet.getNetOpCode(), packet.payloadLength(),
m_arqSeqExp, seq, arqSeqWrapCutoff);
#endif
}
}
break;
case OP_Oversized:
{
// Fragmented sequenced data packet.
uint16_t seq = packet.arqSeq();
emit seqReceive(seq, (int)m_streamid);
// Future packet?
if (seq == m_arqSeqExp)
{
// Expected packet.
m_arqSeqExp++;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("SEQ: Found next sequence number in data stream %s (%d), incrementing expected seq, %04x (op code %04x)",
EQStreamStr[m_streamid], m_streamid, seq, packet.getNetOpCode());
#endif
// Push the fragment on.
m_fragment.addFragment(packet);
if (m_fragment.isComplete())
{
// OpCode from fragment. In network order.
uint16_t fragOpCode = *(uint16_t*)(m_fragment.data());
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: Completed oversized app packet on stream %s with seq %04x, total size %d opcode %04x",
EQStreamStr[m_streamid], seq, m_fragment.size()-2, fragOpCode);
#endif
// dispatch fragment. Skip opcode.
if (fragOpCode == 0)
{
// Special app opcode. Skip first byte and op is byte 2 and 3.
fragOpCode = *(uint16_t*)(&m_fragment.data()[1]);
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("EQPacket: special app opcode on completed fragment for opcode 0000 on stream %s (%d). Opcode %04x",
EQStreamStr[m_streamid], m_streamid, fragOpCode);
#endif
dispatchPacket(&m_fragment.data()[3], m_fragment.size()-3,
fragOpCode, m_opcodeDB.find(fragOpCode));
}
else
{
dispatchPacket(&m_fragment.data()[2], m_fragment.size()-2,
fragOpCode, m_opcodeDB.find(fragOpCode));
}
m_fragment.reset();
}
}
else if ((seq > m_arqSeqExp &&
seq < (uint32_t(m_arqSeqExp + arqSeqWrapCutoff))) ||
seq < (int32_t(m_arqSeqExp) - arqSeqWrapCutoff))
{
// Yeah, future packet. Push it on the packet cache.
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: out of order sequence %04x stream %s (%d) expecting %04x, sending to cache, %04d",
seq, EQStreamStr[m_streamid], m_streamid,
m_arqSeqExp, m_cache.size());
#endif
setCache(seq, packet);
}
else
{
#ifdef PACKET_PROCESS_DIAG
// Past packet outside the cut off
seqWarn("SEQ: received sequenced %spacket outside expected window on stream %s (%d) netopcode=%04x size=%d. Expecting seq=%04x got seq=%04x, window size %d, dropping packet as in the past.",
(isSubpacket ? "sub" : ""),
EQStreamStr[m_streamid], m_streamid,
packet.getNetOpCode(), packet.payloadLength(),
m_arqSeqExp, seq, arqSeqWrapCutoff);
#endif
}
}
break;
case OP_SessionRequest:
{
// Session request from client to server.
//
// Sanity check the size. Don't assume any packet we see is an EQ
// session request, since we're gonna cause a huge freakin' malloc
// on the maxlength of the session which for some reason some people
// won't enjoy!
if (packet.payloadLength() != sizeof(SessionRequestStruct))
{
// Either SessionRequestStruct changed or this isn't a session
// request.
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: Ignoring SessionRequest %s:%u->%s:%u with invalid size %d.",
((EQUDPIPPacketFormat&) packet).getIPv4SourceA().ascii(),
((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getIPv4DestA().ascii(),
((EQUDPIPPacketFormat&) packet).getDestPort(),
packet.payloadLength());
#endif
break;
}
// Pull off session request information
SessionRequestStruct* request = (SessionRequestStruct*) packet.payload();
m_sessionId = eqntohuint32((uint8_t*)&(request->sessionId));
m_maxLength = eqntohuint32((uint8_t*)&(request->maxLength));
// Sanity check the max length requested
if (m_maxLength > maxPacketSize)
{
seqWarn("EQPacket: SessionRequest wanted a max packet size of %d which is above our sane max packet size of %d. Using our max",
m_maxLength, maxPacketSize);
m_maxLength = maxPacketSize;
}
emit maxLength((int) m_maxLength, (int) m_streamid);
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionRequest found, resetting expected seq, stream %s (%d) (session tracking %s)",
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
#if defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionRequest %s:%u->%s:%u, sessionId %u maxLength %u, awaiting key for stream %s (%d)",
((EQUDPIPPacketFormat&) packet).getIPv4SourceA().ascii(),
((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getIPv4DestA().ascii(),
((EQUDPIPPacketFormat&) packet).getDestPort(),
m_sessionId, m_maxLength, EQStreamStr[m_streamid], m_streamid);
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 1)
seqDebug("EQPacket: SessionRequest contents: unknown %u, sessionId %u, maxLength %u",
eqntohuint32((uint8_t*)&(request->unknown0000)),
m_sessionId, m_maxLength);
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 2)
seqDebug("EQPacket: Raw SessionRequest: %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x",
packet.payload()[0], packet.payload()[1], packet.payload()[2],
packet.payload()[3], packet.payload()[4], packet.payload()[5],
packet.payload()[6], packet.payload()[7], packet.payload()[8],
packet.payload()[9], packet.payload()[10], packet.payload()[11]);
#endif
m_arqSeqExp = 0;
m_arqSeqFound = true;
if (m_session_tracking_enabled)
{
// Save off client port for the stream so we can match against it
// later. SessionRequest should always be an outer protocol packet
// so we can cast it to EQUDPIPPacketFormat to get the ip headers.
m_sessionClientPort = ((EQUDPIPPacketFormat&) packet).getSourcePort();
}
}
break;
case OP_SessionResponse:
{
// Session response from server
// Sanity check the size. Don't assume any packet we see is an EQ
// session response, since we're gonna cause a huge freakin' malloc
// on the maxlength of the session which for some reason some people
// won't enjoy!
if (packet.payloadLength() != sizeof(SessionResponseStruct))
{
// Either SessionResponseStruct changed or this isn't a session
// response.
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: Ignoring SessionResponse %s:%u->%s:%u with invalid size %d.",
((EQUDPIPPacketFormat&) packet).getIPv4SourceA().ascii(),
((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getIPv4DestA().ascii(),
((EQUDPIPPacketFormat&) packet).getDestPort(),
packet.payloadLength());
#endif
break;
}
// Pull off session response information
SessionResponseStruct* response =
(SessionResponseStruct*) packet.payload();
m_maxLength = eqntohuint32((uint8_t*)&(response->maxLength));
m_sessionKey = eqntohuint32((uint8_t*)&(response->key));
m_sessionId = eqntohuint32((uint8_t*)&(response->sessionId));
// Sanity check the max length requested
if (m_maxLength > maxPacketSize)
{
seqWarn("EQPacket: SessionResponse wanted a max packet size of %d which is above our sane max packet size of %d. Using our max",
m_maxLength, maxPacketSize);
m_maxLength = maxPacketSize;
}
emit maxLength((int) m_maxLength, (int) m_streamid);
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionResponse found %s:%u->%s:%u, resetting expected seq, stream %s (%d) (session tracking %s)",
((EQUDPIPPacketFormat&) packet).getIPv4SourceA().ascii(),
((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getIPv4DestA().ascii(),
((EQUDPIPPacketFormat&) packet).getDestPort(),
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
#if defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionResponse sessionId %u maxLength %u, key is %u for stream %s (%d)",
m_sessionId, m_maxLength, m_sessionKey,
EQStreamStr[m_streamid], m_streamid);
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 1)
seqDebug("EQPacket: SessionResponse contents: sessionId %u, key %u, unknown %u, unknown %u, maxLength %u, unknown %u",
m_sessionId, m_sessionKey,
eqntohuint16((uint8_t*)&(response->unknown0008)),
response->unknown0010, m_maxLength,
eqntohuint32((uint8_t*) &(response->unknown0015)));
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 2)
seqDebug("EQPacket: Raw SessionResponse: %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x%02x %02x",
packet.payload()[0], packet.payload()[1], packet.payload()[2],
packet.payload()[3], packet.payload()[4], packet.payload()[5],
packet.payload()[6], packet.payload()[7], packet.payload()[8],
packet.payload()[9], packet.payload()[10], packet.payload()[11],
packet.payload()[12], packet.payload()[13], packet.payload()[14],
packet.payload()[15], packet.payload()[16], packet.payload()[17],
packet.payload()[18]);
#endif
// Provide key to corresponding stream from this session/stream
emit sessionKey(m_sessionId, m_streamid, m_sessionKey);
m_arqSeqExp = 0;
m_arqSeqFound = true;
// Session tracking
if (m_session_tracking_enabled)
{
// Save off client port for the stream so we can match against it
// later. SessionRequest should always be an outer protocol packet
// so we can cast it to EQUDPIPPacketFormat to get the ip headers.
m_sessionClientPort = ((EQUDPIPPacketFormat&) packet).getDestPort();
// If this is the world server talking to us, reset session tracking if
// it is on so we unlatch the client in case of getting kicked.
if (m_streamid == world2client)
{
m_session_tracking_enabled = 1;
emit sessionTrackingChanged(m_session_tracking_enabled);
}
// If this is the zone server talking to us, close the latch and lock
else if (m_streamid == zone2client)
{
// SessionResponse should always be an outer protocol packet, so
// the EQProtocolPacket passed in can be cast back to
// EQUDPIPPacketFormat, which we need to go to get access to the IP
// headers!
m_session_tracking_enabled = 2;
emit lockOnClient(((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getDestPort());
emit sessionTrackingChanged(m_session_tracking_enabled);
}
}
}
break;
case OP_SessionDisconnect:
{
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionDisconnect found %s:%u->%s:%u, resetting expected seq, stream %s (%d) (session tracking %s)",
((EQUDPIPPacketFormat&) packet).getIPv4SourceA().ascii(),
((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getIPv4DestA().ascii(),
((EQUDPIPPacketFormat&) packet).getDestPort(),
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 2)
seqDebug("EQPacket: Raw SessionDisconnect: %02x%02x %02x%02x %02x%02x %02x%02x",
packet.payload()[0], packet.payload()[1], packet.payload()[2],
packet.payload()[3], packet.payload()[4], packet.payload()[5],
packet.payload()[6], packet.payload()[7]);
#endif
m_arqSeqExp = 0;
// Clear cache
resetCache();
// Signal closing. Unlatch session tracking if it is on.
if (m_session_tracking_enabled)
{
m_session_tracking_enabled = 1;
emit sessionTrackingChanged(m_session_tracking_enabled);
m_sessionClientPort = 0;
}
emit closing(m_sessionId, m_streamid);
}
break;
case OP_Ack:
case OP_AckFuture:
case OP_AckAfterDisconnect:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: no-op on ACK for net opcode %04x seq %04x, stream %s (%d)",
packet.getNetOpCode(), eqntohuint16(packet.payload()),
EQStreamStr[m_streamid], m_streamid);
#endif
}
break;
case OP_KeepAlive:
case OP_SessionStatRequest:
case OP_SessionStatResponse:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: no-op on stats for net opcode %04x, stream %s (%d)",
packet.getNetOpCode(), EQStreamStr[m_streamid], m_streamid);
#endif
}
break;
default :
{
seqWarn("EQPacket: Unhandled net opcode %04x, stream %s, size %d",
packet.getNetOpCode(), EQStreamStr[m_streamid], packet.payloadLength());
}
}
}
/////////////////////////////////////////////////////
// Handle a protocol level packet. This could be either a top-level
// EQUDPIPPacket or a subpacket that is just an EQProtocolPacket. Either way
// we use net opcodes here.
void EQPacketStream::processPacket(EQProtocolPacket& packet, bool isSubpacket)
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("-->EQPacketStream::processPacket, subpacket=%s on stream %s (%d)",
(isSubpacket ? "true" : "false"), EQStreamStr[m_streamid], m_streamid);
#endif
if (IS_APP_OPCODE(packet.getNetOpCode()))
{
// This is an app-opcode directly on the wire with no wrapping protocol
// information. Weird, but whatever gets the stream read, right?
dispatchPacket(packet.payload(), packet.payloadLength(),
packet.getNetOpCode(), m_opcodeDB.find(packet.getNetOpCode()));
return;
}
// Process the net opcode
switch (packet.getNetOpCode())
{
case OP_Combined:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: found combined packet (net op: %04x, size %d) on stream %s (%d). Unrolling.",
packet.getNetOpCode(), packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
// Rolled up multiple packets inside this packet. Need to unroll them
// and process them individually. subpacket starts after the net opcode.
uint8_t* subpacket = packet.payload();
while (subpacket < packet.payload() + packet.payloadLength())
{
// Length specified first on the wire.
uint8_t subpacketLength = subpacket[0];
// Move past the length
subpacket++;
// OpCode (in net order)
uint16_t subOpCode = *(uint16_t*)subpacket;
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Opcode is next. Net opcode or app opcode?
if (IS_NET_OPCODE(subOpCode))
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: processing unrolled net opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Net opcode. false = copy. true = subpacket
EQProtocolPacket spacket(subpacket, subpacketLength, false, true);
processPacket(spacket, true);
}
else
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// App opcode. Dispatch it, skipping opcode.
dispatchPacket(&subpacket[2], subpacketLength-2,
subOpCode, m_opcodeDB.find(subOpCode));
}
subpacket += subpacketLength;
}
}
break;
case OP_AppCombined:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: found appcombined packet (net op: %04x, size %d) on stream %s (%d). Unrolling.",
packet.getNetOpCode(), packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
// Multiple app op codes in the same packet. Need to unroll and dispatch
// them.
uint8_t* subpacket = packet.payload();
while (subpacket < packet.payload() + packet.payloadLength())
{
// Length specified first on the wire.
uint8_t subpacketLength = subpacket[0];
// Move past the length
subpacket++;
if (subpacketLength != 0xff)
{
// Dispatch app op code using given packet length. Net order!
uint16_t subOpCode = *(uint16_t*)(subpacket);
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength, EQStreamStr[m_streamid], m_streamid, subOpCode);
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
subpacketLength-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Dispatch, skipping op code.
dispatchPacket(&subpacket[2], subpacketLength-2,
subOpCode, m_opcodeDB.find(subOpCode));
// Move ahead
subpacket += subpacketLength;
}
else
{
// If original length is 0xff, it means it is a long one. The length
// is 2 bytes and next.
uint16_t longOne = eqntohuint16(subpacket);
// Move past the 2 byte length
subpacket += 2;
// OpCode next. Net order for op codes.
uint16_t subOpCode = *(uint16_t*)subpacket;
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: unrolling length %d bytes from combined packet on stream %s (%d). Opcode %04x",
longOne, EQStreamStr[m_streamid], m_streamid, subOpCode);
seqDebug("EQPacket: processing unrolled app opcode, length %d bytes from combined packet on stream %s (%d). Opcode %04x",
longOne-2, EQStreamStr[m_streamid], m_streamid, subOpCode);
#endif
// Dispatch, skipping op code.
dispatchPacket(&subpacket[2], longOne-2,
subOpCode, m_opcodeDB.find(subOpCode));
// Move ahead
subpacket += longOne;
}
}
}
break;
case OP_Packet:
{
// Normal unfragmented sequenced packet.
uint16_t seq = eqntohuint16(packet.payload());
emit seqReceive(seq, (int)m_streamid);
if (seq >= m_arqSeqExp)
{
// Future packet?
if (seq == m_arqSeqExp)
{
// Expected packet.
m_arqSeqExp++;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
// OpCode next. Net order for op codes.
uint16_t subOpCode = *(uint16_t*)(&packet.payload()[2]);
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("SEQ: Found next sequence number in data stream %s (%d), incrementing expected seq, %04x (op code %04x, sub opcode %04x)",
EQStreamStr[m_streamid], m_streamid, seq, packet.getNetOpCode(),
subOpCode);
#endif
// App opcode or net opcode?
if (IS_NET_OPCODE(subOpCode))
{
// Net opcode. false = no copy. true = subpacket.
EQProtocolPacket spacket(&packet.payload()[2],
packet.payloadLength()-2, false, true);
processPacket(spacket, true);
}
else
{
// App opcode. Dispatch, skipping seq and opcode.
dispatchPacket(&packet.payload()[4], packet.payloadLength()-4,
subOpCode, m_opcodeDB.find(subOpCode));
}
}
else if (seq < (uint32_t(m_arqSeqExp + arqSeqWrapCutoff)) ||
seq < (int32_t(m_arqSeqExp - arqSeqWrapCutoff)))
{
// Yeah, future packet. Push it on the packet cache.
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: out of order sequence %04x stream %s (%d) expecting %04x, sending to cache, %04d",
seq, EQStreamStr[m_streamid], m_streamid,
m_arqSeqExp, m_cache.size());
#endif
setCache(seq, packet);
}
else
{
// Past packet outside the cut off
seqWarn("SEQ: received sequenced %spacket outside the bounds of reasonableness. Expecting seq=%04x got seq=%04x, reasonableness being %d in the future.",
(isSubpacket ? "sub" : ""), m_arqSeqExp, seq, arqSeqWrapCutoff);
}
}
else
{
// Spooky packet from the past. Boo!
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("discarding %spacket netopcode=%04x seq=%d size=%d on stream %s (%d). Packet is in the past. We've moved on.",
(isSubpacket ? "sub" : ""),
packet.getNetOpCode(), seq, packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
}
}
break;
case OP_Oversized:
{
// Fragmented sequenced data packet.
uint16_t seq = eqntohuint16(packet.payload());
emit seqReceive(seq, (int)m_streamid);
if (seq >= m_arqSeqExp)
{
// Future packet?
if (seq > m_arqSeqExp)
{
// Yeah, future packet. Push it on the packet cache.
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("SEQ: out of order sequence %04x stream %s (%d) expecting %04x, sending to cache, %04d",
seq, EQStreamStr[m_streamid], m_streamid,
m_arqSeqExp, m_cache.size());
#endif
setCache(seq, packet);
}
else
{
// Expected packet.
m_arqSeqExp++;
emit seqExpect(m_arqSeqExp, (int)m_streamid);
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("SEQ: Found next sequence number in data stream %s (%d), incrementing expected seq, %04x (op code %04x)",
EQStreamStr[m_streamid], m_streamid, seq, packet.getNetOpCode());
#endif
// Push the fragment on.
m_fragment.addFragment(packet);
if (m_fragment.isComplete())
{
// OpCode from fragment. In network order.
uint16_t fragOpCode = *(uint16_t*)(m_fragment.data());
#ifdef PACKET_PROCESS_DIAG
seqDebug("SEQ: Completed oversized app packet on stream %s with seq %04x, total size %d opcode %04x",
EQStreamStr[m_streamid], seq, m_fragment.size()-2, fragOpCode);
#endif
// dispatch fragment. Skip opcode.
dispatchPacket(&m_fragment.data()[2], m_fragment.size()-2,
fragOpCode, m_opcodeDB.find(fragOpCode));
m_fragment.reset();
}
}
}
else
{
// Spooky packet from the past. Boo!
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 1)
seqDebug("discarding packet netopcode=%04x seq=%d size=%d on stream %s (%d). Packet is in the past. We've moved on.",
packet.getNetOpCode(), seq, packet.payloadLength(),
EQStreamStr[m_streamid], m_streamid);
#endif
}
}
break;
case OP_SessionRequest:
{
// Session request from client to server.
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionRequest found, resetting expected seq, stream %s (%d) (session tracking %s)",
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
// Pull off session request information
SessionRequestStruct* request =
(SessionRequestStruct*) packet.payload();
m_sessionId = eqntohuint32((uint8_t*)&(request->sessionId));
m_maxLength = eqntohuint32((uint8_t*)&(request->maxLength));
#if defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionRequest sessionId %u maxLength %u, awaiting key for stream %s (%d)",
m_sessionId,
m_maxLength,
EQStreamStr[m_streamid],
m_streamid);
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 1)
seqDebug("EQPacket: SessionRequest contents: unknown %u, sessionId %u, maxLength %u",
eqntohuint32((uint8_t*)&(request->unknown0000)),
m_sessionId,
m_maxLength);
#endif
m_arqSeqExp = 0;
m_arqSeqFound = true;
}
break;
case OP_SessionResponse:
{
// Session response from server
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionResponse found, resetting expected seq, stream %s (%d) (session tracking %s)",
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
// Pull off session response information
SessionResponseStruct* response =
(SessionResponseStruct*) packet.payload();
m_maxLength = eqntohuint32((uint8_t*)&(response->maxLength));
m_sessionKey = eqntohuint32((uint8_t*)&(response->key));
m_sessionId = eqntohuint32((uint8_t*)&(response->sessionId));
#if defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionResponse sessionId %u maxLength %u, key is %u for stream %s (%d)",
m_sessionId,
m_maxLength,
m_sessionKey,
EQStreamStr[m_streamid],
m_streamid);
#endif
#if defined(PACKET_SESSION_DIAG) && (PACKET_SESSION_DIAG > 1)
seqDebug("EQPacket: SessionResponse contents: sessionId %u, key %u, unknown %u, unknown %u, maxLength %u, unknown %u",
m_sessionId,
m_sessionKey,
eqntohuint16((uint8_t*)&(response->unknown0008)),
response->unknown0010,
m_maxLength,
eqntohuint32((uint8_t*) &(response->unknown0015)));
#endif
// Provide key to corresponding stream from this session/stream
emit sessionKey(m_sessionId, m_streamid, m_sessionKey);
m_arqSeqExp = 0;
m_arqSeqFound = true;
// Session tracking
if (m_session_tracking_enabled)
{
// If this is the world server talking to us, reset session tracking if
// it is on so we unlatch the client in case of getting kicked.
if (m_streamid == world2client)
{
m_session_tracking_enabled = 1;
emit sessionTrackingChanged(m_session_tracking_enabled);
}
// If this is the zone server talking to us, close the latch and lock
else if (m_streamid == zone2client)
{
// SessionResponse should always be an outer protocol packet, so
// the EQProtocolPacket passed in can be cast back to
// EQUDPIPPacketFormat, which we need to go to get access to the IP
// headers!
m_session_tracking_enabled = 2;
emit lockOnClient(((EQUDPIPPacketFormat&) packet).getSourcePort(),
((EQUDPIPPacketFormat&) packet).getDestPort());
emit sessionTrackingChanged(m_session_tracking_enabled);
}
}
}
break;
case OP_SessionDisconnect:
{
#if defined(PACKET_PROCESS_DIAG) || defined(PACKET_SESSION_DIAG)
seqDebug("EQPacket: SessionDisconnect found, resetting expected seq, stream %s (%d) (session tracking %s)",
EQStreamStr[m_streamid], m_streamid,
(m_session_tracking_enabled == 2 ? "locked on" :
(m_session_tracking_enabled == 1 ? "enabled" : "disabled")));
#endif
m_arqSeqExp = 0;
// Clear cache
resetCache();
// Signal closing. Unlatch session tracking if it is on.
if (m_session_tracking_enabled)
{
m_session_tracking_enabled = 1;
emit sessionTrackingChanged(m_session_tracking_enabled);
}
emit closing();
}
break;
case OP_Ack:
case OP_Resend:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: no-op on for net opcode %04x seq %04x, stream %s (%d)",
packet.getNetOpCode(), eqntohuint16(packet.payload()),
EQStreamStr[m_streamid], m_streamid);
#endif
}
break;
case OP_KeepAlive:
case OP_SessionStatRequest:
case OP_SessionStatResponse:
{
#if defined(PACKET_PROCESS_DIAG) && (PACKET_PROCESS_DIAG > 2)
seqDebug("EQPacket: no-op on for net opcode %04x, stream %s (%d)",
packet.getNetOpCode(), EQStreamStr[m_streamid], m_streamid);
#endif
}
break;
default :
{
seqWarn("EQPacket: Unhandled net opcode %04x, stream %s, size %d",
packet.getNetOpCode(), EQStreamStr[m_streamid], packet.payloadLength());
}
}
}