asterisk users - Feb 2010 - Re-INVITE on BYE

Hi gurus,

In need of a little help here. I?m trying to do the Asterisk media release
by using canreinvite=yes. But I found weird behaviour when comes to BYE.
Below are my current setup:

Client A is registered to Opensips
Client B is registered to Asterisk

A ? Opensips ? Asterisk ? B

On hangup below are the SIP flow which I?ve notice from the Asterisk server
itself:

1. Opensips forward the BYE to Asterisk
2. Asterisk response with 200 OK
3. Asterisk send INVITE to B
4. B response with 200 OK with SDP
5. Asterisk reply with ACK
6. Asterisk send BYE to B
7. B response with 200 OK

Shouldn?t Asterisk forward the BYE to B instead of issuing a re-INVITE then
BYE?

P.s: I?ve also attached the traces.

Regards,
Lawrence
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Lawrence Na (MY-RND at Vyke) wrote:
> On hangup below are the SIP flow which I?ve notice from the Asterisk
> server itself:
> 
>    1. Opensips forward the BYE to Asterisk
>    2. Asterisk response with 200 OK
>    3. Asterisk send INVITE to B
>    4. B response with 200 OK with SDP
>    5. Asterisk reply with ACK
>    6. Asterisk send BYE to B
>    7. B response with 200 OK
> 
> 
> Shouldn?t Asterisk forward the BYE to B instead of issuing a re-INVITE
> then BYE?
Asterisk does not 'forward' messages or requests, since it is not a
proxy. In this case, it is redirecting B's media back to itself in case
the dialplan contains any steps to be done with B's channel before it is
destroyed.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org

Hi Kevin,

Thx for your kind response. Is there any options/steps that I could trigger
to skip from redirecting the media back to Asterisk?

Regards,
Lawrence
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Lawrence Na (MY-RND at Vyke) wrote:
> Thx for your kind response. Is there any options/steps that I could
> trigger to skip from redirecting the media back to Asterisk?
If your mail client allows, please *reply* to messages in a thread,
rather than starting a new thread with the same subject. This way people
who find that thread in the list archives can see all the messages in
the thread. Thanks.

To answer your question, though, no, there is no method available in
Asterisk today to modify this behavior. Are you just curious, or do
think it is actually causing a problem?

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org