[OpenSIPS-Users] forward retransmition of "200 OK" if no ACK

Bogdan-Andrei Iancu bogdan at voice-system.ro
Tue Jul 6 19:13:22 CEST 2010


Hi Julien,

Note that when doing sip_trace() from script, you will actually put the 
message in DB. So, if the sip_trace is not protected by a t_newtran() 
(transaction creation), it will dump the transmissions too.

Regards,
Bogdan

Julien Chavanton wrote:
> Hi Inaki, ok I will have to reproduce it and trace it, to make sure 
> that sip_trace module is not storing retransmition, I would find it 
> strange as it is storing all other restransmition, INVITE, etc.
>  
> I mean "forward retransmition" not "create new retransmition".
>  
>
> ------------------------------------------------------------------------
> *From:* Iñaki Baz Castillo [mailto:ibc at aliax.net]
> *Sent:* Wed 30/06/2010 12:25 AM
> *To:* OpenSIPS users mailling list
> *Cc:* Julien Chavanton
> *Subject:* Re: [OpenSIPS-Users] forward retransmition of "200 OK" if 
> no ACK
>
> 2010/6/29 Julien Chavanton <jc at atlastelecom.com>:
> > Will opensips forward retransmition of "200 OK" if no ACK is 
> received after
> > a while ?
> >
> > According to sip_trace only the first "200 OK" is forwarded
>
> Do a flow capture using "ngrep -Wbyline -t -q port 5060" (or getting a
> pcap file) so you'll get real information about which responses are
> being retransmitted.
> Also, note that 200 OK is a end-to-end response rather than a
> hop-by-hop response (like [3456]XX responses) so the proxy MUST NOT
> retransmit it. It's a task of the UAS the retransmission of the 200
> until it receives the ACK.
>
>
> --
> Iñaki Baz Castillo
> <ibc at aliax.net>
>
> ------------------------------------------------------------------------
>
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> Users at lists.opensips.org
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>   


-- 
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
20 - 24 September 2010, Frankfurt, Germany
www.voice-system.ro




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