[Serusers] HELP: mediaproxy re-INVITE NAT detection

[Klaus Darilion]

Hi Paul!

If you use the nathelper module, you can use force_rtpproxy with the 'l' 
parameter. Check nathelper.c for documentation.

I don't know if there is an equivalent feature in the mediaproxy module.

regards,
klaus


Java Rockx wrote:

> Hi All.
> 
> I'm using ser-0.9.1. 
> 
> Is there a way to determine if mediaproxy is in use for an existing
> SIP call so that re-INVITE messages can avoid losing audio when one or
> the other SIP UAs are NATed?
> 
> We do not proxy RTP streams unless one or more SIP UAs are NATed. But
> on re-INVITE messages I cannot figure out how to test the destination
> of the re-INVITE for the UAs NAT status.
> 
> I've scoured the archives and found a few related articles
> http://lists.iptel.org/pipermail/serdev/2004-March/001515.html
> http://lists.iptel.org/pipermail/serusers/2004-March/006806.html
> 
> But nothing has led me to a solution. I cannot just use
> lookup("location") and test the nat_flag since that won't always work
> on re-INVITEs. A mediaproxy function for something like
> is_existing_session() would be awesome to lookup the Call-ID in the
> existing mediaproxy sessions.
> 
> What am I missing? 
> 
> Regards,
> Paul
> 
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