[SR-Users] Presence: Notify on publication status refresh

[Juha Heinanen]

Daniel-Constantin Mierla writes:

> > Is it possible to configure Kamailio that wouldn’t send NOTIFY request
> > to watchers when publication status refresh (PUBLISH without XML Body)
> > occur?
> >
> 
> no NOTIFY should be sent? Or the NOTIFY in this case should be sent
> without body, just with a new expire value and same etag?

Based on first example in Section 15 of rfc3903 no notify should be
sent:

M9: The PUA determines that the event state it previously published
      is about to expire, and refreshes that event state.

      PUBLISH sip:presentity at example.com SIP/2.0
      Via: SIP/2.0/UDP pua.example.com;branch=z9hG4bK771ash02
      To: <sip:presentity at example.com>
      From: <sip:presentity at example.com>;tag=1234kljk
      Call-ID: 98798798 at pua.example.com
      CSeq: 1 PUBLISH
      Max-Forwards: 70
      SIP-If-Match: dx200xyz
      Expires: 3600
      Event: presence
      Content-Length: 0

   M10: The presence agent receives, and accepts the publication
      refresh.  The timers regarding the expiration of the specific
      event state identified by the entity-tag are updated.  As always,
      the ESC returns an entity-tag in the response to a successful
      PUBLISH.  Note that no actual state change has occurred, so the
      watchers will receive no NOTIFYs.

-- Juha