Actually here, BYE request is generated without tags which means will be
rejected by 481 reply. 

But actually, UA behaviour is not correct to send BYE at this position.
Which user agent you are using?? 

Cheers,

Vivek
Rancore Technologies

More computing sins are committed in the name of efficiency (without
necessarily achieving it) than for any other single reason - including blind
stupidity."

"On the other hand, we cannot ignore efficiency."


-----Original Message-----
From: Kavitha Menneni [mailto:[EMAIL PROTECTED] 
Sent: Monday, July 28, 2008 11:38 AM
To: ViVeK tAlWaR; 'Retesh'; [EMAIL PROTECTED]
Cc: Arun Nadesh R; [email protected]
Subject: RE: [Sip-implementors] Query regarding the race BYE race condition

No BYE can be sent even in early dialog state.

Thanks & Regards,
Kavitha Menneni


-----Original Message-----
From: ViVeK tAlWaR [mailto:[EMAIL PROTECTED]
Sent: Monday, July 28, 2008 11:30 AM
To: 'Retesh'; [EMAIL PROTECTED]
Cc: Arun Nadesh R; Kavitha Menneni; [email protected]
Subject: RE: [Sip-implementors] Query regarding the race BYE race condition

Exactly, BYE will only come to picture after 200 OK of INVITE.

Cheers,

Vivek
Rancore Technologies

More computing sins are committed in the name of efficiency (without
necessarily achieving it) than for any other single reason - including blind
stupidity."

"On the other hand, we cannot ignore efficiency."


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Retesh
Sent: Monday, July 28, 2008 11:33 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED];
[email protected]
Subject: Re: [Sip-implementors] Query regarding the race BYE race condition

In this case BYE cannot be sent from either side, as it is not even an
early dialog (there is no provisional response other than 100).
But, if a UA is mis-behaving and sending BYE then the message flow is
fine. 481 should be sent for BYE and ACK must be sent and processed
for 480 response.

Hope this helps.

Thanks & Regards
Retesh Chadha
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