[Serusers] non-symmetric rtp with rtpproxy??

Cesc cesc.santa at gmail.com
Wed Jan 24 11:04:46 CET 2007


Hehhehehe, tks Klaus!

This was a good moment to repeat the infamous expression made popular in the
internet lists like this ... RTFM! :)
I saw it just after sending the email ... the A flag ... and the S flag (to
set symmetric, as in bridged mode asymmetric is the default ... ).

Now, one more question.
To fulfill my needs, I had to add a few extra rtpproxy flags to the already
existing ... say M, N, X, Y ... But, they are not used all at the same time,
so I was wondering how could i simplify the call of force_rtp_proxy ... Now
I do something like ...

if( blabla )
     force_rtp_proxy("FX")
else if (bla2 )
     force_rtp_proxy("FXY")
else if ....

Not very nice.
Can i do something (maybe avp? i am using ser 0.9.6) so i can have ...
options = F
if( bla )
       options += "X"
if (bla2)
       options +="Y"
if( bla3)
       options = "MN"

Cesc


On 1/23/07, Klaus Darilion <klaus.mailinglists at pernau.at> wrote:
>
> Hi Cesc!
>
> Check out the "a" flag:
>
> http://www.openser.org/docs/modules/1.1.x/nathelper.html#AEN319
>
>
> regards
> klaus
>
>
>
> Cesc wrote:
> > Hi,
> >
> > I know this probably is a useless question, as rtpproxy says it is a
> > symmetric proxy ... but i have to ask, for peace of mind :)
> >
> > In my setup, i have on one side a symmetric rtp phone (A) ... connected
> > to a
> > ser proxy + rtpproxy ... and on the other side, a non-symmetric phone
> (B).
> > This is all on a lan, so no firewalls and stuff ... but I MUST use the
> > rtpproxy and I MUST use this non-symmetric phone (more like a gateway,
> > actually).
> >
> > A ------ SER+rtpproxy ------ B (nonsym)
> >
> > So, the funny thing happens that i end up reciving audio from B to A ...
> > and
> > then I hear A's own audio after being bounced by B (funny, huh?). The
> > bouncing is due to rtpproxy changing the rtp port where he sends to B
> > ... he
> > starts with the one announced on SDP ... then, after the first RTP
> received
> > from B, he switches to this new port ... mmmm
> >
> > I guess this is a lost cause ... but maybe someone has a brilliant
> > idea?? :D
> > (like a hack in rtpproxy which suddenly turns it into
> > non-symmetrical-rtp-supported-endpoint proxy? :D )
> >
> > Regards,
> >
> > Cesc
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Serusers mailing list
> > Serusers at lists.iptel.org
> > http://lists.iptel.org/mailman/listinfo/serusers
>
>
> --
> Klaus Darilion
> nic.at
>
>
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