[Kamailio-Users] DNS lookup for requests within dialog

[catalina oancea]

Hi,

In my scenario kamailio is not a registrar, it's just a proxy
forwarding requests from asterisk to the provider.

Thanks,
Catalina


2009/9/24 Daniel-Constantin Mierla <miconda at gmail.com>:
> Hello,
>
> On 24.09.2009 11:47 Uhr, catalina oancea wrote:
>>
>> Hi all,
>>
>>
>> I tested the following scenario:
>>
>> astreisk                        kamailio                provider(hostname)
>>        -------------------->    dns lookup     -------------------->
>>          REGISTER 1                              REGISTER 1
>>
>>         <--------------------                      <--------------------
>>          401                                          401
>>
>>          -------------------->   dns lookup     -------------------->
>>          REGISTER 2                              REGISTER 2
>>          (same dialog, increased cseq)
>>
>>
>>
>> It seems that kamailio does dns lookup again when receiving REGISTER
>> 2, although both registers are part of the same dialog. Is this the
>> expected behavior?
>>
>>
>
> IIRC now, there is no place in registrar related modules (registrar and
> usrloc) where DNS query is done. You have some checks in your config that
> caused that.
>
> There is also an option to fetch existing contacts from location and see if
> it is an update (matching by call id and cseq) and do directly
> save("location").
>
> Cheers,
> Daniel
>
> --
> Daniel-Constantin Mierla
> * Kamailio SIP Masterclass, Nov 9-13, 2009, Berlin
> * http://www.asipto.com/index.php/sip-router-masterclass/
>
>