[OpenSIPS-Users] Trouble SDP o-line

[Bogdan-Andrei Iancu]

Hi Julian,

Not sure about Mediaproxy, but rtpproxy module (using rtpproxy as relay)
can change the "o" line also (explicitly).

Best regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 07/22/2013 04:09 PM, Julian Santer wrote:
> Hi,
>
> we are using OpenSips 1.6.4 (starting with the migration to 1.8.x)
> with nat_traversal module and Mediaproxy 2.5.2.
> The Media at the moment will be relayed over the Mediaproxy only if it
> is necessary.
>
> For the routing to PSTN we have two carriers.
> One of them ignores the o-line in SDP the other not.
>
> So we got problems with one of the carrier, when in the o-line is a
> private or invalid IP and also if the o-line is not the same as the
> c-line
>
> Example:
>
> OK:
>     v=0
>     o=root 2142162444 2142162444 IN IP4 $PUBLIC_IP
>     s=call
>     c=IN IP4 $PUBLIC_IP
>
> KO:
>     v=0
>     o=user 15997790 15997790 IN IP4 $PRIVATE_IP
>     s=call
>     c=IN IP4 $PUBLIC_IP
>
> But also if we relay over our Mediaproxy, only the c-line will be
> changed.
>
> KO:
>     v=0
>     o=- 46755 32066 IN IP4 $INVALID_IP
>     s=bjoraow
>     c=IN IP4 $MEDIAPROXY_IP
>
> Have I any possiblity to inject the o-line or shouldn't I do that?
> Will the change of the o-line break the signalization?
> Should the carrier ignore the IP in the o-line?
>
> Thank you for any help.
>
> Best Regards,
>
> Julian
>
>
>
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