SIP Info Framework draft-ietf-sip-info-events-03 Eric Burger - PowerPoint PPT Presentation

SIP Info Framework draft-ietf-sip-info-events-03 Eric Burger Hadriel Kaplan Christer Holmberg March 2009 IETF 74 - San Francisco, CA, USA 1

Changes on List • Fix up all occurrences of “dialog mumble” with “dialog parameters” • Table 1 has archaic references to 2543 • Clarify language for overlapping INFOs and the “nil” package • Now for Open Issues March 2009 IETF 74 - San Francisco, CA, USA 2

Get a 489, can all still be fine? • Option 1: Tear down dialog Something is hopelessly broken, give up • Option 2: ignore it – We say INFO does not change dialog state, and a 489 tearing down dialog changes state – But, handling 489 differently for INFO makes INFO “special” – But what if I said “package X is OK” in an INVITE, but there is glare between you sending an INFO from package X and my dropping X in my ACK? March 2009 IETF 74 - San Francisco, CA, USA 3

Response Messages • All agree on INVITE, UPDATE, ACK, 101-299, 300-699 • Probably sensible to exclude 100 from Recv-Info processing calculation. Thoughts? • What about PRACK/PRACK 2xx? • What about REFER/REFER 2xx? • Missing Recv-Info, empty Recv-Info, Recv-Info: nil March 2009 IETF 74 - San Francisco, CA, USA 4