the flow you have mentioned is bit confusing...
its very well valid to cancel the re-Invite...
a possible proper flow would be...
LOCAL-SIP REMOTE-SIP
INVITE
--------------------->
180
<---------------------
200
<---------------------
ACK
---------------------->
(re)INVITE
<---------------------
provisional response
---------------------->
CANCEL
<---------------------
200-CNCL
--------------------->
487-INV
--------------------->
ACK
<--------------------
BYE
<--------------------
Regards,
Nataraju A.B.
-----Original Message-----
From: [EMAIL PROTECTED] on behalf of Sweeney, Andrew (Andrew)
Sent: Fri 5/19/2006 5:15 AM
To: '[email protected]'
Subject: [Sip-implementors] Cancelling a Re-Invite??
Is it valid to cancel a re-invite as in the call flow shown below?
I have never seen it. I though Cancels were only sent before a dialog
was established.
Thanks
Andy
LOCAL-SIP REMOTE-SIP
INVITE
--------------------->
180
<---------------------
200
<---------------------
ACK
---------------------->
(re)INVITE
<---------------------
some error response
---------------------->
CANCEL
<---------------------
200
--------------------->
487
--------------------->
ACK
<--------------------
BYE
<--------------------
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