Retronetworking » OCTOI - Osmocom Community TDM over IP

Community TDMSS7 Network » Proposed efficient TDMoIP »

Ladder Diagrams » History » Revision 3

Revision 2 (laforge, 03/03/2022 08:49 PM) → Revision 3/8 (laforge, 03/03/2022 08:51 PM)

h1. Ladder Diagrams 

 h2. Initial connection setup 

 {{mscgen_link() 
 msc { 
   hscale=2; 
   client [label="Client"], server [label="Server (main port)"], worker [label="Server (worker port)"], hlr [label="HLR (database)"]; 
   |||; 
   --- [label="Initial connection attempt from client to well-known server/port"]; 
   |||; 
   client => server [label="HELLO_REQ (user_id)"]; 
   server <=> hlr [label="Obtain auth vectors"]; 
   client <= server [label="AUTH_REQ (rand, autn)"]; 
   client => server [label="AUTH_RESP (res)"]; 
   server box server [label="Verify res == xres?"]; 
   server => worker [label="Create worker socket"]; 
   server note server [label="Server accepts client + redirects to worker IP+Port"]; 
   client <= server [label="HELLO_ACK (worker IP:Port, token)"]; 
   ...; 
   client => worker [label="HELLO_REQ (user_id, token)"]; 
   worker box worker [label="Verify user_id + token"]; 
   client <= worker [label="HELLO_ACK"]; 
   ...; 
   client <=> worker [label="TDMoIP"]; 
   ...; 
 } 
 }} 

 h2. subsequent re-authentication 

 {{mscgen_link() 
 msc { 
   hscale=2; 
   client [label="Client"], server [label="Server (main port)"], worker [label="Server (worker port)"], hlr [label="HLR (database)"]; 
   |||; 
   --- [label="At any later point in time, whenever the server wants"]; 
   worker <=> hlr [label="Obtain auth vectors"]; 
   client <= worker [label="AUTH_REQ (rand, autn)"]; 
   client => worker [label="AUTH_RESP (res)"]; 
   worker box worker [label="Verify res == xres?"]; 
 

 } 
 }}