bool Buffer::DeserializeToMessage(
::google::protobuf::Message *message,
uint32 length) {
bool result = message->ParseFromArray(read_content(), length);
ReadSkip(length);
return result;
}
bool WorldSocket::ProcessIncomingData()
{
ClientPktHeader header;
if (m_useExistingHeader)
{
m_useExistingHeader = false;
header = m_existingHeader;
ReadSkip(sizeof(ClientPktHeader));
}
else
{
if (!Read((char *)&header, sizeof(ClientPktHeader)))
{
errno = EBADMSG;
return false;
}
m_crypt.DecryptRecv((uint8 *)&header, sizeof(ClientPktHeader));
EndianConvertReverse(header.size);
EndianConvert(header.cmd);
}
// there must always be at least four bytes for the opcode,
// and 0x2800 is the largest supported buffer in the client
if ((header.size < 4) || (header.size > 0x2800) || (header.cmd >= NUM_MSG_TYPES))
{
sLog.outError("WorldSocket::ProcessIncomingData: client sent malformed packet size = %u , cmd = %u", header.size, header.cmd);
errno = EINVAL;
return false;
}
// the minus four is because we've already read the four byte opcode value
const uint16 validBytesRemaining = header.size - 4;
// check if the client has told us that there is more data than there is
if (validBytesRemaining > ReadLengthRemaining())
{
// we must preserve the decrypted header so as not to corrupt the crypto state, and to prevent duplicating work
m_useExistingHeader = true;
m_existingHeader = header;
// we move the read pointer backward because it will be skipped again later. this is a slight kludge, but to solve
// it more elegantly would require introducing protocol awareness into the socket library, which we want to avoid
ReadSkip(-static_cast<int>(sizeof(ClientPktHeader)));
errno = EBADMSG;
return false;
}
Opcodes x;
const OpcodesList opcode = static_cast<OpcodesList>(header.cmd);
if (IsClosed())
return false;
std::unique_ptr<WorldPacket> pct(new WorldPacket(opcode, validBytesRemaining));
if (validBytesRemaining)
{
pct->append(InPeak(), validBytesRemaining);
ReadSkip(validBytesRemaining);
}
sLog.outWorldPacketDump(GetRemoteEndpoint().c_str(), pct->GetOpcode(), pct->GetOpcodeName(), *pct, true);
try
{
switch (opcode)
{
case CMSG_AUTH_SESSION:
if (m_session)
{
sLog.outError("WorldSocket::ProcessIncomingData: Player send CMSG_AUTH_SESSION again");
return false;
}
return HandleAuthSession(*pct);
case CMSG_PING:
return HandlePing(*pct);
case CMSG_KEEP_ALIVE:
DEBUG_LOG("CMSG_KEEP_ALIVE ,size: " SIZEFMTD " ", pct->size());
return true;
default:
{
if (!m_session)
{
sLog.outError("WorldSocket::ProcessIncomingData: Client not authed opcode = %u", uint32(opcode));
return false;
}
m_session->QueuePacket(std::move(pct));
return true;
}
}
}
catch (ByteBufferException&)
{
sLog.outError("WorldSocket::ProcessIncomingData ByteBufferException occured while parsing an instant handled packet (opcode: %u) from client %s, accountid=%i.",
opcode, GetRemoteAddress().c_str(), m_session ? m_session->GetAccountId() : -1);
if (sLog.HasLogLevelOrHigher(LOG_LVL_DEBUG))
{
DEBUG_LOG("Dumping error-causing packet:");
pct->hexlike();
}
if (sWorld.getConfig(CONFIG_BOOL_KICK_PLAYER_ON_BAD_PACKET))
{
DETAIL_LOG("Disconnecting session [account id %i / address %s] for badly formatted packet.",
m_session ? m_session->GetAccountId() : -1, GetRemoteAddress().c_str());
return false;
}
}
return true;
}
