[OpenSIPS-Users] CANCEL with a To tag.

[Alex Balashov]

Alex Balashov wrote:
> Iñaki Baz Castillo wrote:
> 
>> 2009/5/11 Alex Balashov <abalashov at evaristesys.com>:
>>> It sounds like the CANCEL with the To-tag should have a Route header as
>>> well in order for it to be processed like any other sequential/in-dialog
>>> request -- that is to say, under loose_route().
>> But it would be incorrect anyway. A CANCEL for an initial-INVITE
>> shouldn't have To tag since the CANCEL must end the whole UAC
>> transaction, not just an early-dialog.
> 
> Agreed, but I think the more harmless approach would be for the To tag 
> issue to be ignored by the proxy and passed to the receiving UA to deal 
> with.

Although, since the has_totag() check is done first and loose_route() 
second in stock configs from which people derive theirs, I guess that 
really wouldn't work...

-- 
Alex Balashov
Evariste Systems
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