[OpenSIPS-Users] Doubt about provisional responses processing

[Bogdan-Andrei Iancu]

Hi Sergio,

Sergio Gutierrez wrote:
> Hi Bogdan.
>
> This is also my doubt. Is that re-INVITE an initial request, in whose 
> case, it would be handled in the same way than previous INVITES, or is 
> it a Sequential Request.?
a re-INVITE is an request in an existing dialog, so a Sequential request.
>
> Or, is the re-INVITE handled at on_branch_route?

re-INVITE is a separate transaction than the initial INVITE. And for 
each transaction, at request time you can individually set a 
reply/branch/failure route.
>
> As far as I understand, that invite would be a new initial request, 
> but may be that is the mistake.
it is a new request, but not initial :) - it is sequential as it has to-tag.

Regards,
Bogdan
>
> Thanks and regards.
>
> On Wed, Aug 25, 2010 at 4:34 AM, Bogdan-Andrei Iancu 
> <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>> wrote:
>
>     Hi Sergio,
>
>     It may sound silly, but are you sure that you arm t_on_reply() for the
>     re-INVITE also ?
>
>     Regards,
>     Bogdan
>
>     Sergio Gutierrez wrote:
>     > Hi Bogdan.
>     >
>     > Thanks for your answer.
>     >
>     > You may check a trace at http://200.13.254.180/~saguti/fax.cap
>     <http://200.13.254.180/%7Esaguti/fax.cap>
>     > <http://200.13.254.180/%7Esaguti/fax.cap> (Wireshark format)
>     >
>     > if you see, for example frames 6, 10, 13 and 16, have the
>     > 200.13.235.178 IP address at SDP connection, because they are
>     > rewritten to be handled by mediaproxy.
>     > Trouble frame is 26, which is not rewritten at all; SDP
>     connection IP
>     > is the same at both sides. Frame 34 has the same symptom.
>     >
>     > Thanks in advance for your help.
>     >
>     > On Tue, Aug 24, 2010 at 11:12 AM, Bogdan-Andrei Iancu
>     > <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>
>     <mailto:bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>>>
>     wrote:
>     >
>     >     Hi Sergio,
>     >
>     >     So, for the re-INVITE you have a provisional reply before
>     the 200 OK
>     >     (both replies for re-INVITE). Is this true ? and the 200 OK does
>     >     not hit
>     >     the on_reply route ?
>     >
>     >     Do you have a full SIP trace of such a call ?
>     >
>     >     Regards,
>     >     Bogdan
>     >
>     >     Sergio Gutierrez wrote:
>     >     > Hello to all members.
>     >     >
>     >     > I have a deployment of OpenSIPS 1.5.3 whose configuration is
>     >     designed
>     >     > in such a way as every call uses rtpproxy. I am using
>     >     > force_rtp_proxy() for initial requests, sequential
>     requests and at
>     >     > on_reply_route().
>     >     >
>     >     > For the particular case of FAX calls, I see that the first
>     call is
>     >     > well treated, but the re-INVITE call which enables T38
>     protocol,
>     >     works
>     >     > fine until a provisional response which I am receiving
>     preivous
>     >     to 200
>     >     > OK containing SDP. This 200 OK when received on OpenSIPS
>     is not
>     >     being
>     >     > processed at on_reply_route, so SDP is not being
>     rewritten. I am
>     >     > watching this behaviour on OpenSIPS log, where I see on reply
>     >     route is
>     >     > not being triggered.
>     >     >
>     >     > My question is, Is there any other place in the script
>     where those
>     >     > responses are being processed?
>     >     >
>     >     > Thanks in advance for your answer.
>     >     >
>     >     > --
>     >     > Sergio Gutiérrez
>     >     >
>     >    
>     ------------------------------------------------------------------------
>     >
>     >
>     >     --
>     >     Bogdan-Andrei Iancu
>     >     OpenSIPS Bootcamp
>     >     20 - 24 September 2010, Frankfurt, Germany
>     >     www.voice-system.ro <http://www.voice-system.ro>
>     <http://www.voice-system.ro>
>     >
>     >
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>     >
>     >
>     >
>     > --
>     > Sergio Gutiérrez
>     >
>     ------------------------------------------------------------------------
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>
>     --
>     Bogdan-Andrei Iancu
>     OpenSIPS Bootcamp
>     20 - 24 September 2010, Frankfurt, Germany
>     www.voice-system.ro <http://www.voice-system.ro>
>
>
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>
> -- 
> Sergio Gutiérrez
> ------------------------------------------------------------------------
>
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-- 
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
20 - 24 September 2010, Frankfurt, Germany
www.voice-system.ro