[Freeswitch-dev] Would like to contribute bypass media feature for freeswitch/skinny

Simon Wunderlich sw at simonwunderlich.de
Thu Sep 11 22:06:11 MSD 2014

Hello Freeswitch devs,

we would like to contribute the bypass media feature for the skinny 
implementation in freeswitch. I've contacted Mathieu and Nathan (the  
mod_skinny devs/authors) previously, and they recommended to write to this 
mailing list for the core questions. My first step would be to get a general 
understanding how to accomplish that feature, and any advice would be very 
much appreciated. My background: I've been contributing a few patches skinny 
already, but don't have a real understanding of the core functionality of 

From the discussion with Mathieu and Nathan, we've agreed that implementing 
Codec negotiation would be the first step - which is not yet implemented in 
Skinny. Switch_core_media seems to offer that functionality in general, however 
Skinny does not operate with SDP descriptions.

So my first questions would be:
 * Should mod_skinny generate SDP generations to interface with the freeswitch 
codec negotiation? Or are there any other alternatives to interface with the 
current implementation?
 * Do you have any recommendations where to look at, maybe a simple 
implementation? I've been looking into sofia, but I felt a little lost to be 
 * are the any other requirements to consider?

Thank you very much,
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