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

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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


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SLIDE 1

SIP Info Framework

draft-ietf-sip-info-events-03 Eric Burger Hadriel Kaplan Christer Holmberg

March 2009 1 IETF 74 - San Francisco, CA, USA

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SLIDE 2

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 2 IETF 74 - San Francisco, CA, USA

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SLIDE 3

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 3 IETF 74 - San Francisco, CA, USA

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SLIDE 4

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 4 IETF 74 - San Francisco, CA, USA