[SR-Users] kamailio asterisk NOTIFY

[Anthony Messina]

On Monday, March 23, 2015 06:42:59 PM Alex Balashov wrote:
> Anthony,
> 
> The Contact presented by the subscriber in the initial subscription is:
> 
>     m: "Test User"
> <sip:172.16.4.7;line=sr-D8G7CE2.5PUeK-xuarl7NYDdNYDxNYlFUYoeUeQ8Cw.6DE2vDdyJ
> DAa4TliwC84OC82LK-2ehwl7NYDdNYDxNYlFUAm6UYzm0gme>;+sip.ice
> 
> And the subsequent NOTIFY is correctly targeted to this RURI:
> 
>     NOTIFY
> sip:172.16.4.7;line=sr-D8G7CE2.5PUeK-xuarl7NYDdNYDxNYlFUYoeUeQ8Cw.6DE2vDdyJD
> Aa4TliwC84OC82LK-2ehwl7NYDdNYDxNYlFUAm6UYzm0gme SIP/2.0
> 
> The subscriber returns this Contact in the 200 OK response for the NOTIFY:
> 
>     m: "Test User"
> <sip:172.16.4.7;line=sr-D8G7CE2.5PUeK-xuarl7NYDdNYDxNYlFUYoeUeQ8Cw.6DE2vDdyJ
> DAa4TliwC84O>;+sip.ice
> 
> And subsequent NOTIFYs appear to use this RURI instead of the original
> Contact of the subscriber:
> 
>     NOTIFY
> sip:172.16.4.7;line=sr-D8G7CE2.5PUeK-xuarl7NYDdNYDxNYlFUYoeUeQ8Cw.6DE2vDdyJD
> Aa4TliwC84O SIP/2.0
> 
>     NOTIFY
> sip:172.16.4.7;line=sr-D8G7CE2.5PUeK-xuarl7NYDdNYDxNYlFUYoeUeQ8Cw.6DE2vDdyJD
> Aa4TliwC84O SIP/2.0
> 
> etc.
> 
> A SUBSCRIBE is a dialog-creating event, so in-dialog messages (e.g.
> NOTIFYs) should be targeted at a Request URI corresponding to the
> Contact URI of the SUBSCRIBE-er. It seems to me that this is the problem
> here, rather than truncation.

Alex, good catch!  I see that now.  I was too focused on the request URI.  My 
trouble in tracking the real source of this issue was that both the client 
SUBSCRIBE-er (CSipSimple) and Asterisk (13.2.0) are using PJSIP.  It does 
appear that CSipSimple may be truncating the contact in the 200 OK response to 
the first NOTIFY (though that may not be the real issue).

I'll need to dig into the TOPOH hiding of the contact header.

-- 
Anthony - https://messinet.com/ - https://messinet.com/~amessina/gallery
8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
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