[Users] CANCEL processing

[Bogdan-Andrei Iancu]

Hi Michael,

that is correct. just note you may encounter some races between INVITEs 
and CANCELs in the case of a fast CANCEL (CANCEL follows the INVITE 
almost instantly) - when one process is still handling the INVITE (the 
transaction may not be build yet), another process receives the CANCEL 
and it will not be able to match it to a transaction in this case, the 
CANCEL will be forward based on its RURI without any info from INVITE.....

regards,
bogdan

Michael Ulitskiy wrote:

>Hello,
>
>I have a question about CANCEL processing.
>I read on the mailing list that CANCEL will be automatically matched by t_relay
>to transaction it's cancelling, if needed transformation to RURI will be automatically 
>applied and then it will be automatically send to correct destination. 
>I'm experimenting with openser 0.10.x and it seems to be true, but I'd like to confirm 
>that the following is OK:
>
>if (loose_route()) {
>	do something
>	t_relay();
>	break;
>}
>if (is_method("CANCEL")) {
>    	t_relay();
>                   break;
>}
>if (uri==myself) {
>	do lookups that rewrite RURI
>	t_relay();
>}
>
>Thank you,
>
>  
>