[OpenSIPS-Users] Rtp proxy issue

[Robert Dyck]

Additionally SDP can be sent in an ACK following 200 OK when the INVITE did 
not include it.

On Sunday 08 March 2009, Alex Balashov wrote:
> It means you are applying the NAT UAC test function for SDP to a request
> that does not have an SDP payload.
>
> It should only be applied to messages that contain SDP payloads.  Easy
> way to check:
>
>
>     if(search("Content-Type: application/sdp"))
>
> Also, only the following kinds of messages can contain SDP descriptors:
>
> 1) Initial INVITEs;
>
> 2) Sequential INVITEs;
>
> 3) 200 OKs to INVITE transactions;
>
> 4) Non-100 1xx provisional messages -- these are usually 183 Session in
> Progress and 180 Ringing messages.  However, technically, any non-100
> 1xx message can contain an SDP body per the RFC.  In practise, this is
> rare, so t_check_status("200|183|180") will work for most scenarios.
> But if you want to be strictly correct, do:
>
>    if((t_check_status("200|183|180") && search("Content_Type:
> application/sdp")) || search("Content-Type: application/sdp"))
>
> michel freiha wrote:
> > Hi all,
> > I'm getting the below error when trying to make a call through OpenSIPS
> >
> > DBG:core:parse_headers: flags=ffffffffffffffff
> > Mar  6 20:43:29 [7117] ERROR:nathelper:extract_body: message body has
> > length zero
> > Mar  6 20:43:29 [7117] ERROR:nathelper:force_rtp_proxy2_f: can't extract
> > body from the message
> >
> > Can you explain please how this is affecting the call specially that the
> > call is working fine
> >
> > Regards
> >
> >
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