[asterisk-users] How to read or relay SIP PUBLISH messages ?

[Olivier]

2017-02-16 14:27 GMT+01:00 Joshua Colp <jcolp at digium.com>:

> On Thu, Feb 16, 2017, at 09:11 AM, Olivier wrote:
> > Hello,
> >
> > I'm currently testing a so-called VQ RTCP-XR feature from a a SIP
> > hardphone.
> >
> > When a phone has enabled this feature, it would send a SIP PUBLISH to its
> > SIP Server letting this server dispatch to whatever is needs to.
> >
> > These messages are sent during calls but may also be sent when a call is
> > over.
> >
> > At the moment, I'm using Asterisk to serve these SIP phones so my
> > Asterisk
> > box receives those SIP PUBLISH and discard them with a 489 Bad Event
> > reply.
> >
> > I'm not using or planning to use any Kamalio server.
> >
> > 1. Is there an Asterisk version that would allow me to read (and store)
> > in
> > or out-of-band SIP PUBLISH messages from SIP phones ?
> > 2. Alternatively, is there an Asterisk version that would allow me to
> > relay
> > those messages somewhere ?
>
> No version of Asterisk allows the handling or relaying of these
> arbitrary PUBLISH messages. In the case of PJSIP though that is
> pluggable so a C module could be written to do something.
>

>From RFC 6035, "This document defines a new SIP event package, vq-rtcpxr,
and
a new MIME type, application/vq-rtcpxr, that enable the collection and
reporting of metrics".

As I'm not aware of many SIP event package currently implemented in
PJSIP/Asterisk acting for
out-of-calls events, it shouldn't be easy to mimic current features to add
this new one.



> > 3. Would a Kamalio-like box allow me to do this ?
>
> You could act as you wish on the PUBLISH requests in Kamailio.
>

This seams easier, for the moment.

I think I still need to better understand what are mixed Asterisk-Kamailio
architectures main strengths
compared to alternatives (Asterisk alone, Kamailio/RTPproxy, ...) but that
is another story.

Thank you very much for replying.



>
> --
> Joshua Colp
> Digium, Inc. | Senior Software Developer
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - US
> Check us out at: www.digium.com & www.asterisk.org
>
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