[SR-Users] logging destination IP and proto on reponse

[Andrew Chen]

First, thanks guys for all the responses.  These are great suggestions.

So my Kamailio needs to forward SIP responses back to ether client or
server side, depending on where the initial SIP method originated from.
Client side generally is behind NAT.  When forwarding the response, I want
to log the destination IP to I'm forwarding it to and which protocol it is
using by using some sort of pseudovariable.  The reason I want to do this
is for troubleshooting purposes to show that Kamailio is sending it where
it suppose to send it.

After trying different options, I actually ended up using the Via header to
log where the responses are sending it back to:

$sel(via[2].host) - destination host
$sel(via[2].transport - protocol to use

Note that I'm not sure if this is the best and accurate option for what I'm
doing, but I'm using this assuming the fact that my next hop is in via[2].

On Thu, Jan 3, 2019 at 4:53 AM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Hello,
>
> like Joel said, in reply_rpute or onreply_route use $si and $pr to get the
> source ip and protocol of the reply.
>
> If you need it in failure_route, then use $T_rpl($si) and $T_rpl($pr),
> from the TMX module like was suggested by another response.
>
> If none of these is what you want, then explain where you needed to see
> what is possible.
>
> Cheers,
> Daniel
>
> On Thu, Jan 3, 2019 at 7:06 AM YAS0 CANER <caner_yaso at hotmail.com> wrote:
>
>> Oh my bad, I got now.
>>
>> on reply route , you can get some variables. Have you tried "TMX module
>> Pseudo-Variables"
>> https://www.kamailio.org/wiki/cookbooks/5.2.x/pseudovariables
>> ------------------------------
>> *From:* sr-users <sr-users-bounces at lists.kamailio.org> on behalf of YAS0
>> CANER <caner_yaso at hotmail.com>
>> *Sent:* Thursday, January 3, 2019 9:01 AM
>> *To:* Sergiu Pojoga; Kamailio (SER) - Users Mailing List
>> *Subject:* Re: [SR-Users] logging destination IP and proto on reponse
>>
>> Hello,
>>
>> you can use accounting module to log them.You can append new variables,
>>
>> modparam("acc", "log_extra",
>> "src_user=$fU;src_domain=$fd;src_ip=$si;"
>> "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")
>> in addition, there is a onsend_route to help what you need.
>>
>> https://www.kamailio.org/wiki/cookbooks/5.2.x/core#onsend_route
>> cookbooks:5.2.x:core [Kamailio SIP Server Wiki]
>> <https://www.kamailio.org/wiki/cookbooks/5.2.x/core#onsend_route>
>> This is the second section of the configuration file, containing the
>> directives to load modules and set their parameters. It contains the
>> directives loadmodule and modparam.In the default configuration file starts
>> with the line setting the path to modules (the assignment to mpath core
>> parameter.. Example of content:
>> www.kamailio.org
>>
>>
>> onsend_route
>>
>>   onsend_route {
>>     if(to_ip==1.2.3.4 && !isflagset(12)){
>>       log <http://www.opengroup.org/onlinepubs/009695399/functions/log.html>(1, "message blocked\n");
>>       drop;
>>     }
>>   }
>>
>>
>>
>> ------------------------------
>> *From:* sr-users <sr-users-bounces at lists.kamailio.org> on behalf of
>> Sergiu Pojoga <pojogas at gmail.com>
>> *Sent:* Thursday, January 3, 2019 4:01 AM
>> *To:* Kamailio (SER) - Users Mailing List
>> *Subject:* Re: [SR-Users] logging destination IP and proto on reponse
>>
>> $sel(via[2].host) should give the 'destination' of the reply, provided
>> that the original request wasn't from behind NAT and one single proxy in
>> between UAs.
>>
>> Don't take my answer for granted, as I don't think it's complete and/or
>> accurate.
>>
>>
>> On Wed, Jan 2, 2019 at 5:11 PM Andrew Chen <achen at fuze.com> wrote:
>>
>> Hey all,
>>
>> Any way to log destination IP and proto of SIP responses?  I'd tried to
>> use majority of the pseudovars, but they all just return <null>.
>>
>> Thanks.
>>
>> --
>> Andy Chen
>> achen@ <achen at thinkingphones.com>fuze.com
>>
>>
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>
>
> --
> Daniel-Constantin Mierla - http://www.asipto.com
> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>


-- 
Andy Chen
Sr. Telephony Lead Engineer
415 516 5535 (M)
achen@ <achen at thinkingphones.com>fuze.com

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