[Spce-user] Remove SDP media-level attribute - direction

[Imanol Pardavila]

Hi Andreas,

"kamailio.cfg.tt2" file has the following main structure:

route
...
route[ROUTE_RELAY]
...
route[ROUTE_REQUEST]
...
onreply_route
...
onsend_route
...

I guess that I have to insert something like this:

if(has_body("application/sdp")
{
	# fix for Sonus SBC - remove directmedia attribute
         xlog("L_INFO", "Removing directmedia attribute - [% logreq -%]\n");
         replace_body_all(" a=directmedia:active ", "");

}

But I'm not sure about where to insert it. Could you help me?

Thanks
Best regards
Imanol

El 09/11/2012 12:45, Andreas Granig escribió:
> Hi Imanol,
>
> Oh, right, it's added by the proxy then after mediaproxy is engaged. So
> the best place would be the load-balancer config at
> /etc/ngcp-config/templates/etc/kamailio/lb/kamailio.cfg.customtt.tt2.
>
> Andreas
>
> On 11/09/2012 11:49 AM, Imanol Pardavila wrote:
>> Hi Andreas,
>> Looking at my traces I'm sure that endpoints aren't sending this
>> attribute; I've just filtered the first packet with this line on SDP
>> body and it's been sent by CE.
>>
>>    * SDP sent from our SBC to CE:
>>
>>          Session Description Protocol
>>              Session Description Protocol Version (v): 0
>>              Owner/Creator, Session Id (o): Sonus_UAC IN IP4 10.34.241.67
>>              Session Name (s): SIP Media Capabilities
>>              Connection Information (c): IN IP4 10.34.240.60
>>              Time Description, active time (t): 0 0
>>              Media Description, name and address (m): audio 1552 RTP/AVP
>> 0 8 101
>>              Media Attribute (a): rtpmap:0 PCMU/8000
>>              Media Attribute (a): rtpmap:8 PCMA/8000
>>              Media Attribute (a): rtpmap:101 telephone-event/8000
>>              Media Attribute (a): fmtp:101 0-15
>>              Media Attribute (a): sendrecv
>>              Media Attribute (a): ptime:20
>>
>>    * SDP sent from CE to our SBC (following packet in the sequence):
>>
>>          Session Description Protocol
>>              Session Description Protocol Version (v): 0
>>              Owner/Creator, Session Id (o): Sonus_UAC IN IP4 10.34.242.11
>>              Session Name (s): SIP Media Capabilities
>>              Connection Information (c): IN IP4 10.34.242.11
>>              Time Description, active time (t): 0 0
>>              Media Description, name and address (m): audio 30132 RTP/AVP
>> 0 8 101
>>              Media Attribute (a): rtpmap:0 PCMU/8000
>>              Media Attribute (a): rtpmap:8 PCMA/8000
>>              Media Attribute (a): rtpmap:101 telephone-event/8000
>>              Media Attribute (a): fmtp:101 0-15
>>              Media Attribute (a): sendrecv
>>              Media Attribute (a): ptime:20
>>              *Media Attribute (a): direction:active**
>> **            Media Attribute (a): oldmediaip:10.34.240.60**
>> **            Media Attribute (a): nortpproxy:yes*
>>
>> Flow diagram:
>>
>> |endpoint A| ------------- |SBC| ------------- |CE| ------------- |SBC|
>> ------------- |endpoint B|
>>
>> SBC: 10.34.240.60, 10.34.241.67
>> CE: 10.34.242.11
>>
>> Any ideas?
>> Thanks
>> Best regards
>> Imanol
>>
>> El 08/11/2012 20:22, Andreas Granig escribió:
>>> Hi,
>>>
>>> On 11/08/2012 05:25 PM, Imanol Pardavila wrote:
>>>> I'm not sure about who builds SDP? lb, proxy, sems? I guess that the
>>> The SDP is created by the endpoints, not by the CE.
>>>
>>>> idea is create my customtt.tt2 file and use replace_body_all () function
>>>> something like:
>>>>
>>>> # remove direction attribute
>>>> replace_body_all(" a=directmedia:active ", "");
>>>>
>>>> Is it correct?
>>> Not sure about the whitespaces, you might need to leave them out I guess.
>>>
>>> Andreas
>>>
>>>
>>>
>>> _______________________________________________
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>>>
>>>
>>> -----
>>> No se encontraron virus en este mensaje.
>>> Comprobado por AVG - www.avg.com
>>> Version: 2012.0.2221 / Base de datos de virus: 2441/5382 - Fecha de publicacion: 11/08/12
>>
>>
>> _______________________________________________
>> Spce-user mailing list
>> Spce-user at lists.sipwise.com
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>>
>
>
> _______________________________________________
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>
> -----
> No se encontraron virus en este mensaje.
> Comprobado por AVG - www.avg.com
> Version: 2012.0.2221 / Base de datos de virus: 2441/5383 - Fecha de publicacion: 11/08/12

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