Send SIP Messages From Config File

You can initiate SIP messages from Kamailio (OpenSER) configuration file ...

uac module provides a new function that allow sending sip requests from configuration file:

- uac_send_req()

http://kamailio.org/docs/modules/devel/uac.html#id2467912

It opens the door for a new bunch of things you can do now. I can think of now:

1) send IM alerts on special events

route { 
 $uac_req(method)="MESSAGE";
 $uac_req(ruri)= "sip:alert[at]kamailio.org";
 $uac_req(furi)="sip:server[at]kamailio.org";
 $uac_req(hdrs)="Content-Type: text/plain\r\n";
 $uac_req(body)="SIP request from:" + $si + ":" + $sp;
 uac_send_req();
}

2) turn lamps on for some sip phones on some events - e.g., snom:

http://wiki.snom.com/Features/LED_Remote_Control

3) talk server-to-server - here one example can be building a platform with a central server for accounting. Accounting is done at 200ok. So each routing server will build a csv list (time,callid, from tag, to tag, invite from uri, invite r-uri):

onreply_route[1] {

  if(status!="200")

    return;

  $uac_req(method)="ACCOUNTING";

  $uac_req(ruri)="sip:store[at]accounting.kamailio.org";

  $uac_req(furi)="sip:server[at]server1.kamailio.org";

  $uac_req(hdrs)="Content-Type: text/accounting-csv\r\n";

  pv_printf($uac_req(body), "$TS,$ci,$ft,$tt,$T_req($fu),$T_req($ru)");

  uac_send_req();

}

note that $T_req() is given by tm module, also with Kamailio trunk:

http://www.kamailio.org/dokuwiki/doku.php/pseudovariables:devel#tm_module_pseudo-variables

The accounting server:

route{

  # you should check the source IP also

  if(method=="ACCOUNTING" && $rU="store")

  {

       sql_query("ca",

             "insert into accounting(timeval,callid,ftag,ttag,src,dst) values ('$(rb{s.select,0,,})','$(rb{s.select,1,,})', ...)",

             "ra");

      send_reply("200", "Stored");   

  }

}

... and you can put your imagination work ... there are plenty of new and cute features you can add on your service with this functionality ...