Thank you very much for helping us to fix a bug.
Now while user terminating the call, the SIP stack will not send CANCEL until
receiving the frist provisional response.
I think this will be ok.
----- Original Message -----
From: Balaji Murlitharan
To: Chacoo
Cc: [email protected]
Sent: Monday, January 08, 2007 8:23 PM
Subject: Re: [Sip-implementors] Question on CANCEL
Hi,
RFC 3261 section 9.1 says the following,
" If no provisional response has been received, the CANCEL request MUST NOT
be sent; rather, the client MUST wait for the arrival of a provisional response
before sending the request "..
Hope this helps....
Regds,
Balaji Murlitharan.C
Aricent
"Chacoo" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
01/08/2007 04:54 PM
To <[email protected]>
cc
Subject [Sip-implementors] Question on CANCEL
Hi
I have some question on following scenario.
1. Alice send INVITE to Bob.
2. Before receiving any message, Alice terminated the call. In the other
word, it send CANCEL to Bob.
3. Because of using UDP or some other reasons, Bob receives CANCEL before
INVITE.
4. Bob send 481 for CANCEL, and then process INVITE, 180 or 200 will be sent.
5. Alice receive 481, then cease retransmission of CANCEL. After that Alice
receive 180 or 200.
Q1. Now what should be taken to inform Bob to cease the retransmission, or
just let it be?
Q2. The other reason in 3 may be that the retransmission of INVITE cannot
ceased by sending CANCEL. So can the INVITE transaction be ceased by sending
CANCEL?
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