You should handle the cancel.

—
Sent from mobile, with due apologies for brevity and errors.

> On Jan 28, 2020, at 8:45 AM, Ali Taher <[email protected]> wrote:
> 
> 
> Hello Alex,
>  
> Kamailio sent 300 multiple choice back to SBC even after the SBC sent the 
> CANCEL request , knowing that SBC sent the CANCEL 4 times as Kamailio didn’t 
> respond to it , which is normal as in the routing logic I’m only handling 
> INVITE packets (if (is_method("INVITE"))).
> So I’m confused whether I have to handle it or not.
>  
> Regards,                                                                      
>    
> Ali Taher
>  
> From: sr-users <[email protected]> On Behalf Of Alex 
> Balashov
> Sent: Tuesday, January 28, 2020 3:37 PM
> To: Kamailio (SER) - Users Mailing List <[email protected]>
> Subject: Re: [SR-Users] SIP Redirect CANCEL handling
>  
> Unless you have created a transaction in the course of processing the 
> redirect, there is no transaction to terminate, and accordingly no 487 to 
> generate. However, these decisions are made by the default CANCEL handling 
> (with hooks into TM) from the stock Kamailio config. You should not need any 
> special logic of your own here.
>  
> —
> Sent from my iPad
> 
> 
> On Jan 28, 2020, at 8:29 AM, Ali Taher <[email protected]> wrote:
> 
> 
> Hello,
>  
> I’m using Kamailio as sip redirect server where SBC forwards the calls to 
> Kamailio which sends the routing back to SBC in 3xx response.
>  
> Now, I need to handle CANCEL requests sent from SBC to Kamailio. Here is the 
> scenario:
> the client sends CANCEL request to SBC which responds with 200 OK and 487 
> Request Terminated and then sends CANCEL request to Kamailio.
> I’m not sure how Kamailio should handle the CANCEL request here, should it 
> send only 200 OK back to SBC or also should send 487 request terminated?
>  
> Regards,
> Ali Taher
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