[OpenSIPS-Users] Rtp proxy issue

[Jeff Pyle]

This is exactly what Broadworks does when transfering calls to and from
media servers to generate auto attendant greetings, ringback, etc.  More
than one SBC has been confused by this, including Broadsoft's own Genband.


- Jeff



On 3/9/09 1:38 PM, "Robert Dyck" <rob.dyck at telus.net> wrote:

> 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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> 
> 
> 
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