[OpenSER-Users] Bug in 200 to CANCEL (wrong To_tag)

[Klaus Darilion]

And what says the RFC about a proxy which does parallel forking? Then 
there may be multiple 180 ringing with multiple to tags. Which one 
should be used?

Further, what if the callee has not sent a response yet - then openser 
also does not know which to-tag to use.

I nave had such problems with Asterisk yet. Do you use Asterisk in 
pedantic mode?

regards
klaus

Iñaki Baz Castillo schrieb:
> Hi,
> 
> If Asterisk CANCEL a call to OpenSer then Asterisk resends the CANCEL many 
> times because it ignores the 200 OK from OpenSer.
> 
> I think this is an OpenSer bug because the 200 OK to the CANCEL contains a 
> To_tag different of the To_tag in the 180 (RFC 3261 in 9.2 says they SHOULD 
> be the same To tag).
> 
> I've reported the bug but sincerely I'd like you to read it since I'm sure 
> many people work with Asterisk and OpenSer and could know something about 
> this CANCEL issue:
>   
> http://sourceforge.net/tracker/index.php?func=detail&aid=1818469&group_id=139143&atid=743020
> 
> Thanks for any comment.
> 
>