3.1.5.1 Sending a Message
This section specifies common steps that MUST be performed whenever the client sends to the server a message of any of the types specified in section 2.2.4.
The message MUST be encapsulated in a TcpMessageHeader (section 2.2.3) packet. Multiple messages MUST NOT be combined in a single TcpMessageHeader (section 2.2.3) packet.