2.9.3. Paging

DAPNet server makes use of a TCP connection between the hotspots and server, however that doesn’t really scale well so for the RAYNET Paging system we’ve defined a new protocol using UDP. This protocol is very light weight on both sides.

Below is the basic authentication and PING/PONG response between the hotspot and server. The PING/PONG is used to make sure any firewalls and routers remember the UDP path between the two.

@startuml Client -> Server : PING note left: Attempt to checkin with Server Server -> Client : LOGNAK note right: If IP/PORT does not match expected send LOGNAK to request auth Client -> Server : PLON note left: Request login for ID Server -> Client : PSALT note right: Return a random Salt Client -> Server : PLOK note left: send ID and password encrypted with SALT Client <- Server : LOGACK note right: IF auth valid return LOGACK, if not valid send LOGNAK Client -> Server : PING note left: ping server Server -> Client : PONG note right: client is valid and IP / port match expectations @enduml

A paging message is sent via this UDP path as byte stream starting with “PAGE” followed by the message syntax.

  • type (5, timesync, 6, text message)

  • speed (message speed 1 - 1200)

  • RIC (Paging code)

  • Fucntion (function bit or sub RIC)

  • text message (Text message)