[asterisk-dev] Direct media in the new SIP work

[Mark Michelson]

On 03/04/2013 02:04 PM, Jeremy Kister wrote:
> On 3/4/2013 2:47 PM, Mark Michelson wrote:
>> are any direct media-related features that are not in current Asterisk
>> but that would fit well in the new version of Asterisk.
>
>
> not sure if this is the kind of thing you're looking for, but..
>
> https://issues.asterisk.org/jira/browse/ASTERISK-18706
>

Thanks for the input.

In a way, this is what I'm looking for, and in a way it isn't. Keeping 
UDPTL working even if direct media is enabled is something we should 
keep in mind while writing new code. On the other hand, the linked issue 
is likely just due to a bug in Asterisk rather than a design flaw in 
direct media.

In the new SIP work, all SDP stream types have their own handlers for 
accepting, generating, and applying streams. This means that there will 
be a UDPTL stream type that will be written in order to write its SDP 
stream information. In the bug report you linked, it appears that the 
200 OK from one of the Asterisk boxes is placing the wrong address in 
the c= line of the SDP. In the new SIP work, the UDPTL stream will be 
written in a way such as to always place the Asterisk server's IP 
address in the c= line of the UDPTL stream.

Mark Michelson