Re: [Linphone-users] sip.linphone.org proxy does not relay sendonly stream

[Guillaume Beraudo]

Hi,

It is a NAT problem.
If you are behind a NAT you need first to push a hole into it
in order to let the incoming rtp stream reach you.


Guillaume

On Wed, Nov 13, 2013 at 03:54:09PM +0100, Fran Alcala wrote:
> Guillaume, thanks for your response.
> 
> I would appreciate is you could extend a bit what you mean.
> 
> If I set up a sendonly stream I expect the other party not to send any RTP
> at all (am I wrong?). Does that (a one direction stream) disturb
> sip.linphone proxy? Why?
> 
> Regards,
> Fran
> 
> -----Mensaje original-----
> De: Guillaume Beraudo [mailto:address@hidden 
> Enviado el: martes, 12 de noviembre de 2013 10:55
> Para: address@hidden
> Asunto: Re: [Linphone-users] sip.linphone.org proxy does not relay sendonly
> stream
> 
> Hi,
> 
> 
> It may be due to the Linphone 3.5 not sending any rtp.
> 
> You should try replacing the linphone 3.5 by a 3.6.
> 
> Cheers,
> 
> 
> Guillaume
> 
> On Thu, Nov 07, 2013 at 01:38:46PM +0100, Fran Alcala wrote:
> > Hi all,
> > 
> >  
> > 
> > I am looking for help to solve an issue with linphone to linphone video
> > calls using sip.linphone.org as proxy.
> > 
> >  
> > 
> > The setup is as follows: 
> > 
> > On one side, a device running Linphone 3.3.2 on Linux ('local' from now
> on).
> > It captures and sends video but does not display video. Audio is full
> > duplex. 
> > 
> > On the other side, a device running Linphone 3.5 on Linux ('remote' from
> now
> > on). It can capture video, but I don't want it to send the video stream
> > (since the other side cannot display it).
> > 
> >  
> > 
> > During negotiation 'local' sends an INVITE with a SDP that includes
> > a=sendonly for the video stream.
> > 
> > This is relayed by proxy to 'remote'. Proxy changes port numbers to its
> own
> > ports and keeps a=sendonly. So far so good.
> > 
> >  
> > 
> > Remote responds with an OK with SDP. There I can see a=recvonly for the
> > video stream.
> > 
> > This OK is relayed to local, again Proxy changes port numbers and keeps a=
> > recvonly. So negotiation looks ok.
> > 
> >  
> > 
> > Once communication starts, local device starts sending video RTP to the
> port
> > number indicated by proxy to local in the 'OK with SDP' message. 
> > 
> > But this rtp video stream is not reaching 'remote'. Wireshark sees no
> trace
> > of that video stream coming from proxy.
> > 
> >  
> > 
> > As one would expect, 'remote' is not sending any video stream, as required
> > by sendonly attribute.
> > 
> > And audio stream, that is sendrecv (default), is relayed in both
> directions
> > by proxy without any problem.
> > 
> >  
> > 
> > Anybody could help me on this?
> > 
> >  
> > 
> > Thanks a lot.
> > 
> >  
> > 
> >  
> > 
> 
> > _______________________________________________
> > Linphone-users mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/linphone-users
> 
> 
> 
> 
> 
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