Jun,
Please see response inline.
Hi,
I wonder if a user's INVITE transaction can be cancelled by other user. The
scenario is as follows;
User A User B User C
----------INVITE----------->
<--------100/180------------
<----------To cancel the transaction----------
----------CANCEL---------->
<--------200 OK-------------
The Question is that whether the user C is able to cancel the transaction
between the user A and B.
Wayne: I think it is possible but it is wrong for another user to do it, l
ike a MITM attack. But CANCEL is hop by hop so a stateful proxy may CANCEL
a request which is legit.
What kind of method can be used ? Would it be a REFER with method=cancel or
just CANCEL ?
Wayne: Just CANCEL
By the way, I'm really wondering if the scenario makes sense actually.
Wayne: The question makes sense, I am in doubt on the scenario though.
Regards,
Jun
Regards - Wayne
**********************************************************************
Any personal or sensitive information contained in this email and
attachments must be handled in accordance with the Victorian Information
Privacy Act 2000, the Health Records Act 2001 or the Privacy Act 1988
(Commonwealth), as applicable.
This email, including all attachments, is confidential. If you are not the
intended recipient, you must not disclose, distribute, copy or use the
information contained in this email or attachments. Any confidentiality or
privilege is not waived or lost because this email has been sent to you in
error. If you have received it in error, please let us know by reply
email, delete it from your system and destroy any copies.
**********************************************************************
_______________________________________________
Sip-implementors mailing list
[email protected]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
