[Kamailio-Users] SDP ending with CRLF and a=nortpproxy:yes

Klaus Darilion klaus.mailinglists at pernau.at
Thu Sep 11 15:10:43 CEST 2008


A similar bug was also described in opensips. They tried to fix it but 
the bug is still present. I wonder if this is something new or if the 
bug is thre since the beginning of nathelper but did not occured until now

klaus

Aymeric Moizard schrieb:
> Hi,
> 
> I just happen to find an issue with a software
> trying to call through my openser-1.3.1
> 
> After inserting "a=nortpproxy:yes\r\n", the
> message coming out openser is:
> 
> [normal sdp packet]
> a=fmtp:101 0-15\r\n
> \r\n
> \r\n
> "a=nortpproxy:yes\r\n"
> 
> No matter who is responsible in that specific case (the SDP received 
> by openser with several \r\n looks not compliant to me).
> 
> I think openser should add "a=nortpproxy:yes" in different place
> in the SDP packet: NOT at the end of the SDP body. The "a=nortpproxy:yes"
> should be either put at the global attribute level or right below a m= 
> line.
> 
> This approach would solve such issue and would be much more
> adequate to the requirement: currently it's not very possible
> to relay an audio stream and not relay a video stream with the
> current approach.
> 
> tks,
> Aymeric MOIZARD / ANTISIP
> amsip - http://www.antisip.com
> osip2 - http://www.osip.org
> eXosip2 - http://savannah.nongnu.org/projects/exosip/
> 
> 
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