Handling of early CANCELs - was Re: [Serusers] SER Nokia CANCEL Problem

[Jiri Kuthan]

At 13:09 26/02/2007, Martin Hoffmann wrote:
>If you already have a transaction for the INVITE, you should be fine by
>simply passing the CANCEL to tm by calling t_relay(). Don't remember
>what tm does with a CANCEL it doesn't have a transaction for. IMHO it
>should do nothing and give an error back.

IMO, it used to create a kind of special (or crippled) transaction to
allow CANCEL forwarding after a SER reboot. Not really 100% sure what it 
does now. (For potential TM redesigners: this is why it pays off to produce
branch parameters in a way which can be derived from the original request --> 
then even rebooted SER generates branches consistently)

-jiri



--
Jiri Kuthan            http://iptel.org/~jiri/