2.2.4.1.3.1 Polling-Virtual-Connection-Message

The Polling-Virtual-Connection-Message is the additional data pre-pended to the Application-Data to uniquely identify the Entity-Body on a client and a server.

 Polling-Virtual-Connection-Message = 
     Polling-Encapsulation-Version NUL; section 2.2.4.1.3.1.1
     Relay-Server-URL NUL; section 2.2.4.1.3.1.4
     Virtual-Connection-GUID NUL; section 2.2.1.1.1
     Sequence-Number NUL; section 2.2.4.1.3.1.2
     Checksum NUL; section 2.2.4.1.3.1.3