[Serusers] SDP c= field mangled

Java Rockx javarockx at gmail.com
Tue Jul 5 16:35:17 CEST 2005


Dave,

The problem is that probably that your ser.cfg hits use_media_proxy()
more than one.

Perhaps a safety flag could be set to prevent this:

if ((isflagset(6) || isflagset(7)) && !isflagset(8)) {
  setflag(8);
  use_media_proxy();
}

Regards,
Paul

On 7/5/05, Dave <ddx66 at yahoo.com> wrote:
> Hi,I am experiencing a strange issue. I am forwarding
> calls to Asterisk voicemail upon no-response. So, in
> failure route, I simply check the status 408 or 486
> and if true, I jump to a routing-block. In there, I
> have the following:
> -----
> revert_uri();
> rewritehost(Asterisk-IP);
> append_branch();
> if (isflagset(6) || isflagset(7)) use_media_proxy();
> if (!t_relay()...)
> ------
> 
> 
> Now, Asterisk does receive the invite, except that the
> SDP in the SIP invite looks like (PAY ATTENTION TO c=
> field).
> 
> -------------------------------
> v=0
> o=208500512 8000 8001 IN IP4 192.168.1.104
> s=SIP Call
> c=IN IP4 213.189.X.Y213.189.X.Y
> t=0 0
> m=audio 3532235322 RTP/AVP 0 8 4 18 3
> a=sendrecv
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:4 G723/8000
> a=rtpmap:18 G729/8000
> a=rtpmap:3 GSM/8000
> a=ptime:20
> ------------------------------------------
> 
> The c= field has the same IP twice and thus the INVITE
> is rejected by Asterisk.
> 
> Is this a bug and did someone have such an issue?
> Thanks
> 
> 
> 
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