[OpenSIPS-Users] Load Balancer Script - Looping

[Alec Fett]

I'm having some trouble implementing Bogdan's load_balancer tutorial.

The desired behavior is to call the else block (containing xlog("ALL 
GATEWAYS DOWN!\n") ) if all gatways are down.
However, something in my script is causing opensips to enter a 
continuous loop.

Initially I had "route(1)" in failure_route, which I thought was the 
cause. However, this is still an issue when only calling load_balance.

Aug 13 15:43:08 denver12 /usr/local/sbin/opensips[18397]: Saw an 
authorized request FROM IP 10.1.10.76 TO sip:user at 10.1.10.76:5060
.............................many more of 
these...................................
Aug 13 15:43:08 denver12 /usr/local/sbin/opensips[18397]: Saw an 
authorized request FROM IP 10.1.10.76 TO sip:user at 10.1.10.76:5060
Aug 13 15:43:08 denver12 /usr/local/sbin/opensips[18397]: Looping 
detected Sent 483: Looping

(where 10.1.10.76 is openSIPS's ip)

Any suggestions?
Thanks in Advance.

-Alec


----------------------------------------------------------------------------------------

route{
route(1);
}
route[1]{
####IP AUTH##############                
   if( src_ip==10.1.10.0/24 ){
       route(2);
   }
   else{
       sl_send_reply("403","Forbidden");
       xlog("L_INFO", "Unauthorized IP address $si TO $ou Sent 403\n");
       exit;
   }
}

route[2]{
    xlog("Saw an authorized request FROM IP $si TO $ou");

    if (!mf_process_maxfwd_header("3")) {
        sl_send_reply("483","looping");
        xlog("Looping detected Sent 483: Looping\n");
        exit;
    }


    if (!has_totag()) {
                # initial request
        record_route();
    } else {
        # sequential request -> obey Route indication
        loose_route();
                t_relay();
                exit;
        }

        # handle cancel and re-transmissions
    if ( !t_check_trans() ) {
        if (is_method("CANCEL"))
            exit;
    }


        # from now on we have only the initial requests
        if (!is_method("INVITE")) {
                send_reply("405","Method Not Allowed");
                exit;
        }

        # detect resources and do balancing
                 # looks like an IPR call
                if(load_balance("1","ipr")){
                    t_on_failure("1");
                }
                else{
                    xlog("ALL GATEWAYS DOWN!\n");
                    exec_msg("/usr/bin/php /usr/scripts/sip-failed.php 
all_destinations_down_1 '$si' '$rU' '$fu'");
                    sl_send_reply("500","Service full");
                    exit;
                }
               
        # LB function returns negative if no suitable destination (for 
requested resources) is found,
        # or if all destinations are full
        if ($retcode<0) {
            xlog("Gateway down!\n");
            exec_msg("/usr/bin/php /usr/scripts/sip-failed.php 
service_full '$si' '$rU' '$fu'");
            sl_send_reply("500","Service full");
            exit;
        }

    xlog("Selected destination is: $du\n");

        # send it out
    if (!t_relay()) {
        exec_msg("/usr/bin/php /usr/scripts/sip-failed.php 
t_relay_failure '$si' '$rU' '$fu'");
        sl_reply_error();
    }
}

failure_route[1]{
xlog("Gateway down!\n");
exec_msg("/usr/scripts/sip-failed.php gateway_down '$si' '$rU' '$fu'");
lb_disable();
load_balance("1","ipr");
}