[SR-Users] t_relay_to("0x02") alternative with kamailio 3.1

[Herve Couplet]

Already tried that.

Documentation on t_relay from 1.5 says :
*0x02* - do not internally send a negative reply in case of forward failure
(due internal error, bad RURI, bad message, etc). When a forward failure
occurs, no SIP request is relayed and therefore no negative reply or timeout
will show up on the failure_route (if one is set). It applies only when the
transaction is created. By default one negative reply is sent. Useful if you
want to implement a serial forking in case of failure.

The pbx use a dsl connection with a dynamic ip that is renewed during the
night.
So if a register renew comes at the same time there is a ip update during
the night, it will get an error 478 and will stop to register.

My setup is the following :
t_on_reply("3");
t_on_failure("9");
if (!t_relay_to("0x02"))
{
    xlog("L_INFO", "REGISTER RELAY ERROR DROP req > [$rm], from URI: [$fu],
To URI: [$tu]");
    drop();
}

onreply_route[3] {
    xlog("L_INFO", "REPLY ROUTE rep > [$rm], $rs $rr, from URI: [$fu], To
URI: [$tu]");
}

failure_route[9]
{
    xlog("L_INFO", "failure_route rep > [$rm], $rs $rr, from URI: [$fu], To
URI: [$tu]");
    if (!t_check_status("401") && !t_check_status("407"))
    {
xlog("L_INFO", "REGISTER2 RESPONSE ERROR DROP rep > [$rm], $rs $rr, from
URI: [$fu], To URI: [$tu]");
drop();
    }
}

I did put a wrong domain to force network error and I get in the log with
3.1.  (It doesn't go to the onreply_route or failure_route functions as it
was with 1.5).
Kamailio is replying with a SIP/2.0 478 Unresolvable destination (478/TM).
I got the error from t_relay_to but the drop() didn't prevent the 478 to be
sent.

Here is the log :
Jun 16 01:59:10 localhost /usr/sbin/kamailio[10304]: ERROR: <core>
[resolve.c:1540]: ERROR: sip_hostport2su: could not resolve hostname: "
wrongdomain.com"
Jun 16 01:59:10 localhost /usr/sbin/kamailio[10304]: ERROR: tm [ut.h:318]:
failed to resolve "wrongdomain.com"
Jun 16 01:59:10 localhost /usr/sbin/kamailio[10304]: ERROR: tm
[t_fwd.c:1528]: ERROR: t_forward_nonack: failure to add branches
Jun 16 01:59:10 localhost /usr/sbin/kamailio[10304]: INFO: <script>:
REGISTER RELAY ERROR DROP req > [REGISTER], from URI: [
sip:771639197 at wrongdomain.com], To URI: [sip:771639197 at wrongdomain.com]
Jun 16 01:59:36 localhost /usr/sbin/kamailio[10305]: ERROR: <core>
[resolve.c:1540]: ERROR: sip_hostport2su: could not resolve hostname: "
wrongdomain.com"
Jun 16 01:59:36 localhost /usr/sbin/kamailio[10305]: ERROR: tm [ut.h:318]:
failed to resolve "wrongdomain.com"
Jun 16 01:59:36 localhost /usr/sbin/kamailio[10305]: ERROR: tm
[t_fwd.c:1528]: ERROR: t_forward_nonack: failure to add branches
Jun 16 01:59:36 localhost /usr/sbin/kamailio[10305]: ERROR: sl
[sl_funcs.c:282]: ERROR: sl_reply_error used: Unresolvable destination
(478/SL)

Regards,
hp

On Thu, Jun 16, 2011 at 1:52 AM, Alex Balashov <abalashov at evaristesys.com>wrote:

> You can catch and drop replies in an an onreply_route or failure_route.
>
> if(t_check_status("478"))
>   exit;
>
> --
> Alex Balashov - Principal
> Evariste Systems LLC
> 260 Peachtree Street NW
> Suite 2200
> Atlanta, GA 30303
> Tel: +1-678-954-0670
> Fax: +1-404-961-1892
> Web: http://www.evaristesys.com/
>
> On Jun 15, 2011, at 7:48 PM, Herve Couplet <hcouplet at gmail.com> wrote:
>
> > Hi,
> >
> > I had a setup with an old version where I used the function
> t_relay_to("0x02").
> > Following the 3.1 documentation, flag :
> >      0x02 - do not generate reply on internal error (NOTE: has no effect
> anymore)
> >
> > I used that function as a workaround with a pbx that stop to register
> when it receive an error response like
> > 478 Unresolvable destination or 408 request timeout.
> >
> > I did upgrade to 3.1 to have dns srv caching.
> >
> > Do you know how this would be possible with kamailio 3.1.
> >
> > Thanks for your suggestions,
> > hp
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> > sr-users at lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
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