126.96.36.199 Receiving a Packet
This section specifies common steps that MUST be performed whenever the server receives a packet.
If the packet is received on the TCP connection, the server MUST verify that the packet begins with a TcpMessageHeader (section 2.2.3). Each message contained in the packet MUST be processed.
If the packet is received over UDP, it MUST be a RequestPacketListResend (section 2.2.5) packet.
If the KeepAlive timer (as specified in section 3.2.2) is running, it MUST be stopped.