Subject: RE: [Sipping] Crossing message between ACK and INFO

From: [email-masked]
Date: Thu, 4 Mar 2004 10:53:38 +0530

Hi Christophe,

>>1 - discard the message in order that AS resend INFO request OR
>>2 - reject the INFO message with 603 response in order that AS resend
an other request after a timer defined in Retry-
>>After header of response 

Both options 1 and 2 options mean the same.
Indirectly in both the cases you are making the Application Server
retransmit.

But option  1 is better than 2 because
a) If Application Server want to transmit important message in INFO
asap, and if Media Server sent Decline (603) it will  
   transmit after some time (Retry-After) there by increasing the delay.
b) Better to discard than reject.in reject case we have to send a number
of messages!!

Thanking you,

Regards,
Sreeram

-----Original Message-----
From: [email-masked] [mailto:[email-masked]] On Behalf
Of [email-masked]
Sent: Monday, March 01, 2004 10:50 PM
To: [email-masked]
Subject: [Sipping] Crossing message between ACK and INFO

Dear sipping members,

My media server (UDP transport) receives a INFO request 
before ACK because there is a crossing message :

Application Server       Media Server
(Shangai)                  (France)
--------------------------> INVITE
<-------------------------- 180
<-------------------------- 200
-----------
           \
----------  \  -----------> INFO
             \------------> ACK

The INFO message must be send within a dialog. So I was supposed that I
could only be accept after ACK.

What should be the behaviour of media server in this case?
1 - discard the message in order that AS resend INFO request
or
2 - reject the INFO message with 603 response in order that AS resend an
other request after a timer defined in Retry-After header of response or
3 - accept INFO. But in the case, the remote sequence number of ACK
request 
is less that the remote sequence number. 
.../...

Thanks you for you help.

Regards

Christophe Bourny
Alcatel CIT - Rennes - France

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_______________________________________________
Sipping mailing list  https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use [email-masked] for questions on current sip
Use [email-masked] for new developments of core SIP