Hello,

the problem is that lookup(location) is handling only R-URI, so if ruri is for user XYZ and that is offline, then will return false.

Since you create many branches with avp_pushto(), other destinations added as extra branches will be not attempted because of lookup(location) condition.

The best is to relay the call after the avp_pushto(), so you will get two branches (or more) coming back via loopback and then you do lookup location for each:

if(src_ip!=myself)
{
   if(avp_db_load("$ru/username","$avp(s:fork)"))
   {
     avp_pushto("$ru/username","$avp(s:fork)/g");
     t_relay();
     exit;
   }
}

if(!lookup("location")) ....

Be sure you skip authentication or other checks when the requests comes back due to such loop, using if(src_ip==myself) conditions.

Cheers,
Daniel


On 1/21/11 11:10 AM, Daniel Grotti wrote:

Hi all,
I'm using kamailio 3.1 and I have some problems with parallel forking.
I need to implement parallel forking to different users registered on kamailio.
So, when call arrives with R-URI= sip:003912345678@<IP_server>, I need to fork te call to (for example) 2 users: 1001 and 1001.

To do that, I've created my usr_preferences table like this:

+----+------+------------------+--------+-----------+------+-------+---------------------+
| id | uuid | username 	       | domain | attribute | type | value | last_modified       |
+----+------+------------------+--------+-----------+------+-------+---------------------+
|  1 |      | 003912345678     |        | fork      |    0 | 1001  |              |
|  2 |      | 003912345678     |        | fork      |    0 | 1002  |              |
+----+------+------------------+--------+-----------+------+-------+---------------------+

and I've added a code to my kam.cfg like this:

if (is_method("INVITE")) 
{
	
	xlog("L_INFO", "REQUEST Invite - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
        if(avp_db_load("$ru/username","$avp(s:fork)"))
        {
            avp_pushto("$ru/username","$avp(s:fork)/g");

        }
	
	if(!lookup("location"))
        {

                xlog("L_INFO", "Local user offline - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
                sl_send_reply("404", "User Offline");
                exit;
        }
        else
        {

                xlog("L_INFO", "Local user online - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
                t_relay();
        }

}

If 1001 and 1002 are registered everything works fine (1001 Ringing and 1002 ringing).
If only 1001 registered everything works fine (1001 ringing and 1002 is offline.).

But when 1002 is registered and 1001 in offline, kamailio try to call 1001, find that it's offline ( and I get 404 User Offline") but no call to 1002 is attempted.



What's wrong ?



Regards,

Daniel

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-- 
Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Training
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com