[SR-Users] Dispatcher with a naptr address as destination

[Daniel-Constantin Mierla]

Hello,

I think the A query you see is done by the part related to doing OPTIONS
keepalive -- I haven't developed that part, but if I remember correctly
I saw something like that in the code. Maybe you can disable keepalive
via the mod param and see if the query is still done.

For routing, dispatcher is not doing any DNS query, just sets the R-URI
or D-URI and then tm is in charge of resolving the destination address,
and there should be from NAPTR down, if no transport or port is specified.

Cheers,
Daniel

On 14.11.18 17:25, José Seabra wrote:
> Hello all,
> I'm trying to use a naptr address as a dispatcher destination and i'm
> facing some issues here.
>
> When i configure a naptr address in dispatcher table, like:
>
>     /1:1:sip\:proxy-registrar-ci1.fuze.domain:0:0:'':''/
>     /
>     /
>
> I see kamailio making a dns query of type A, but since that this name
> doesn't have any A record configured in dns, kamailio didn't get any
> positive reply from it.
>
> Should't kamailio make dns query by this order? 
>
>  1. NAPTR
>  2. SRV 
>  3. A
>
>
> I noticed also that if the name configured in dispatcher table is
> resolved successfully with A record from dns, then kamailio tries to
> make a query to NAPTR and then SRV services for the exactly same name
> used for query previously done(type A), but only if it gets a positive
> answer from dns to the A type query.
>
> I'm using kamailio version 5.1.0 with the following dns parameters
> configured:
>
> ####### DNS Parameters #########
> dns = no
> rev_dns = no
> dns_try_ipv6 = no
> dns_retr_time = 1
> dns_retr_no = 1
> dns_cache_del_nonexp = no
> dns_cache_flags = 1
> dns_cache_gc_interval = 120
> dns_cache_init = 1
> dns_cache_mem = 1000
> dns_cache_negative_ttl = 60
> dns_try_naptr = yes
> use_dns_cache = on
> use_dns_failover = on
> dns_srv_lb =yes
>  
> Is there something wrongly configured here that can make kamailio
> behaves like that?
>
> Thank you.
> Regards
> -- 
> Cumprimentos
> José Seabra
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
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Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- www.asipto.com

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