asterisk users - Oct 2018 - How to defer SDP in ACK for unit testing purposes

Hello,

I think I met a case similar to the one solved by [1] . Quoting this case :

* res_pjsip: Handle deferred SDP hold/unhold properly.

	  Some SIP devices indicate hold/unhold using deferred SDP reinvites. In
	  other words, they provide no SDP in the reinvite.

	  A typical transaction that starts hold might look something like this:

	  * Device sends reinvite with no SDP
	  * Asterisk sends 200 OK with SDP indicating sendrecv on streams.
	  * Device sends ACK with SDP indicating sendonly on streams.


Now, I would like to configure an Asterisk instance to act as those SIP
devices, ie to defer all SDP signaling in ACK.

This is for testing purpose as I would like to reproduce in a lab an issue
with those SIP devices.

1. Is it possible ? I can use any Asterisk version for implementation.
2. Alternatively, do you know any softphone "implementing SDP in ACK"
?
3. Alternatively, do you know any SIP hardphone implementing this ?
4. Suggestions ?

[1]
http://lists.digium.com/pipermail/asterisk-code-review/2016-April/019483.html

Cheers
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On Wed, Oct 10, 2018, at 4:27 AM, Olivier wrote:
> Hello,
> 
> I think I met a case similar to the one solved by [1] . Quoting this case :
> 
> * res_pjsip: Handle deferred SDP hold/unhold properly.
> 
> 	  Some SIP devices indicate hold/unhold using deferred SDP reinvites. In
> 	  other words, they provide no SDP in the reinvite.
> 
> 	  A typical transaction that starts hold might look something like this:
> 
> 	  * Device sends reinvite with no SDP
> 	  * Asterisk sends 200 OK with SDP indicating sendrecv on streams.
> 	  * Device sends ACK with SDP indicating sendonly on streams.
> 
> 
> Now, I would like to configure an Asterisk instance to act as those SIP
> devices, ie to defer all SDP signaling in ACK.
> 
> This is for testing purpose as I would like to reproduce in a lab an issue
> with those SIP devices.
> 
> 1. Is it possible ? I can use any Asterisk version for implementation.
It is not possible to configure Asterisk for this. The chan_pjsip module only
does normal reinvites with SDP when configured to pass through MOH signaling.

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

Le mer. 10 oct. 2018 à 12:26, Joshua Colp <jcolp at digium.com> a écrit :
> On Wed, Oct 10, 2018, at 4:27 AM, Olivier wrote:
> > Hello,
> >
> > I think I met a case similar to the one solved by [1] . Quoting this
> case :
> >
> > * res_pjsip: Handle deferred SDP hold/unhold properly.
> >
> >         Some SIP devices indicate hold/unhold using deferred SDP
> reinvites. In
> >         other words, they provide no SDP in the reinvite.
> >
> >         A typical transaction that starts hold might look something
like
> this:
> >
> >         * Device sends reinvite with no SDP
> >         * Asterisk sends 200 OK with SDP indicating sendrecv on
streams.
> >         * Device sends ACK with SDP indicating sendonly on streams.
> >
> >
> > Now, I would like to configure an Asterisk instance to act as those
SIP
> > devices, ie to defer all SDP signaling in ACK.
> >
> > This is for testing purpose as I would like to reproduce in a lab an
> issue
> > with those SIP devices.
> >
> > 1. Is it possible ? I can use any Asterisk version for implementation.
>
> It is not possible to configure Asterisk for this. The chan_pjsip module
> only does normal reinvites with SDP when configured to pass through MOH
> signaling.
>
This is the answser I feared ;-)
Thanks for replying.

If someone has a clue for alternatives (softphones, hardphones, ...), I'll
curious to know
>
> --
> Joshua Colp
> Digium - A Sangoma Company | 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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