Hello Daniel

Thanks for pointing out to the SIP traces. I found out that it if the request is to be sent to a destination using a port other than 5060, it is required to add the $uac_req(ouri) parameter too:

$uac_req(ouri)="sip:" + $var(asterisk_ip) + ":" + $var(asterisk_port);
....

$uac_req(ouri)="sip:" + $var(asterisk2_ip) + ":" + $var(asterisk2_port);

Thanks!

Alejandro Rios Peña


DISCLAIMER: The opinions expressed are my own, and not necessarily those of my employer.

2011/4/8 Daniel-Constantin Mierla <miconda@gmail.com>

Hello,

On 4/8/11 12:28 AM, Alejandro Rios P. wrote:

Hi all,

I am testing the scenario described here: http://kb.asipto.com/asterisk:realtime:kamailio-3.1.x-asterisk-1.6.2-astdb

It works great with one instance of Asterisk, but now that I'm testing with two Asterisk instances to load balance, and I see a problem regarding the registration forwarding to the second Asterisk.

I tried adding a second "uac_req_send()" bellow the first one, but Kamailio only sends the first request and the REGISTER never gets to the second Asterisk:

# Forward REGISTER to Asterisk
route[REGFWD]  {
       if(!is_method("REGISTER"))
       {
               return;
       }
       $var(rip)  =  $sel(cfg_get.asterisk.bindip);
       $uac_req(method)="REGISTER";
       $uac_req(ruri)="sip:"  +  $var(rip)  +  ":"  +  $sel(cfg_get.asterisk.bindport);
       $uac_req(furi)="sip:"  +  $au+  "@"  +  $var(rip);
       $uac_req(turi)="sip:"  +  $au+  "@"  +  $var(rip);
       $uac_req(hdrs)="Contact:<sip:"  +  $au+  "@"
                               +  $sel(cfg_get.kamailio.bindip)
                               +  ":"  +  $sel(cfg_get.kamailio.bindport)  +  ">\r\n";
       if($sel(contact.expires)  !=  $null)
               $uac_req(hdrs)=  $uac_req(hdrs)  +  "Expires:"  +  $sel(contact.expires)  +  "\r\n";
       else
               $uac_req(hdrs)=  $uac_req(hdrs)  +  "Expires:"  +  $hdr(Expires)  +  "\r\n";
       uac_req_send();

        $uac_req(all) = null;

       $var(rip2)  =  $sel(cfg_get.asterisk2.bindip);
       $uac_req(method)="REGISTER";
       $uac_req(ruri)="sip:"  +  $var(rip2)  +  ":"  +  $sel(cfg_get.asterisk2.bindport);
       $uac_req(furi)="sip:"  +  $au+  "@"  +  $var(rip2);
       $uac_req(turi)="sip:"  +  $au+  "@"  +  $var(rip2);
       $uac_req(hdrs)="Contact:<sip:"  +  $au+  "@"
                               +  $sel(cfg_get.kamailio.bindip)
                               +  ":"  +  $sel(cfg_get.kamailio.bindport)  +  ">\r\n";
       if($sel(contact.expires)  !=  $null)
               $uac_req(hdrs)=  $uac_req(hdrs)  +  "Expires:"  +  $sel(contact.expires)  +  "\r\n";
       else
               $uac_req(hdrs)=  $uac_req(hdrs)  +  "Expires:"  +  $hdr(Expires)  +  "\r\n";
       uac_req_send();

}

I also tried appending another branch and sending the second  uac_req_send() from there, but it is not being sent.

How can I use uac_req_send() several times for the same request or in parallel?

it should work one after the other. append_branch() does not affect uac_req_send() at all, this is a separate request built from scratch.

Do you get any error message in the syslog? Can you watch the traffic on all interfaces 'ngrep -d any -qt -W byline port 5060' ?

I see you assign '$uac_req(all) = null;', it should be '$uac_req(all) = $null;' - but I guess it was a copy&paste thing.

Cheers,
Daniel

--
Daniel-Constantin Mierla
http://www.asipto.com

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla
http://www.asipto.com