[Kamailio-Users] Translate "486 Busy Here" to "600 Busy Everwhere"

[Alex Balashov]

My understanding is that it would be the former - you can't really  
reply to a reply.  :-) Besides, this technique is used in other  
contexts;  for example, final failure is signaled out of failure  
routes to the calling party when dispatcher rollover runs out of  
gateways to serially fork across.

--
Sent from mobile device

On Nov 10, 2009, at 8:49 PM, Geoffrey Mina <geoffreymina at gmail.com>  
wrote:

> One question on this...
>
> In my scenario, would using t_reply in failure_route send the response
> to the party who sent the INVITE or the party who sent a message which
> caused Kamailio to end up in failure_route?
>
> On Tue, Nov 10, 2009 at 10:38 AM, Alex Balashov
> <abalashov at evaristesys.com> wrote:
>> geoffreymina at gmail.com wrote:
>>>
>>> Hello,
>>> I have a need to translate a 486 from my asterisk server to a 600  
>>> when
>>> sending upstream to my carrier. The problem I am seeing is that  
>>> when I
>>> return 486, the carrier re-presents the call to my next server in  
>>> the SRV
>>> rotation... I really want the 486 to be a final disposition, so I am
>>> assuming sending a 600 would solve my issue.
>>>
>>> I am not sure how to go about forwarding the message, but  
>>> modifying the
>>> SIP code... is that even allowed?
>>>
>>> This would be something like what I'm trying to do:
>>>
>>> failure_route[1]{
>>> if(t_check_status("
>>
>> Sure, you can do that.  It is not a good idea to do so in principle  
>> because
>> it violates how proxies should behave;  proxies are very thin  
>> interoperation
>> layers that are designed to statefully pass requests and replies  
>> back and
>> forth more or less strictly as intended by the endpoints involved,  
>> and a
>> B2BUA would more ideally fit your goal. Nevertheless, it is possible.
>>
>> failure_route[1] {
>>
>>        if(t_was_cancelled())
>>                exit;
>>
>>        if(t_check_status("486")) {
>>                t_reply("603", "Declined");
>>                exit;
>>        }
>> }
>>
>>
>> --
>> Alex Balashov - Principal
>> Evariste Systems
>> Web     : http://www.evaristesys.com/
>> Tel     : (+1) (678) 954-0670
>> Direct  : (+1) (678) 954-0671
>>