Hi everyone,
I'm working with a case that involves a call from A that a proxy forks to B
and C. I see a potential problem when the following happens:
* A sends SDP offer
<proxy forks the call to B and C>
* B answers with a 183 including a sdp answer
* C sends 180 with no spd
* C answers the call first, which means C sends a sdp response in the 200
OK.
I have tried to find info on this but have failed to do so. So I was
thinking that someone on this forum have already been facing a scenario like
this, or maybe know where I can find info on how to solve it in a way that
dont violate specs (and also works of course)
How should A handle this (it already got a sdp answer on the offer)? Does A
or proxy have to start a renegotiation with C?
Should A see in the tag that this is a respone from another UA then from
where it did get the first spd answer (the on in 183 sent from B) and
therefore accept it?
Proxy needs to send a cancel to B when it sees that C is replying wiht 200
OK. Does the proxy also need to say something to A to terminate the media
session already set up between A and B?
Thanks in advance
// Andreas
_______________________________
Andreas Byström
Software Engineer
Teligent AB
Konsul Jonssons väg 17
P.O. Box 213
SE 14923 Nynäshamn
mail: [EMAIL PROTECTED]
web: www.teligent.se <http://www.teligent.se/>
phone: +46 (0)8 4101 7221
mobile: +46 (0)733 1172 21
fax: +46 (0)8 520 193 36
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