[OpenSIPS-Users] limiting the number of gateways tried in lcr module

[Andrew Pogrebennyk]

Thanks for your input, Brett. I tried to initialize the counter from the 
main route block, but it didn't work - somehow I ended up with rURI in 
$avp(i:500). Then I rewrote the failure_route exactly like in the 
example I have provided earlier - and it worked like a magic. Previously 
I've had the same pieces of logic, just written in a different way, so I 
don't know what was the problem with it. Anyway I'm happy with the way 
it works now. In case anyone wonders, here is my working failure_route:

failure_route[1] {
         # -----------------------------------------------------------------
         # Failover to next gateway if any
         # -----------------------------------------------------------------
        if (!isflagset(31)) {
                $avp(i:500) = 1; # Initialize counter of failed attempts
                setflag(31);
        } else {
                $avp(i:500) = $avp(i:500) + 1; # OR:
                # avp_op("$avp(i:500)", "add/1");
        }
        xlog("L_INFO", "----- Made $avp(i:500) failed attempts\n");
        if (t_check_status("403")) {
                xlog("L_INFO", "----- Got 403 response; no more gateways 
will be tried\n");
                t_reply("403", "Forbidden");
                exit;
        }
        if ($avp(i:500) >= 2) { # limit on the search depth is set here
                xlog("L_INFO", "----- Didn't get positive response from 
two gateways; giving up\n");
                t_reply("503", "Couldn't complete the call");
                exit;
        }
        if (next_gw()) {
                t_on_failure("1");
                t_relay();
        } else {
                t_reply("503", "No gateways");
                exit;
        };
}

Brett Nemeroff wrote:
> I don't entirely remember the way the arming of the flags works and how 
> they persist across failure_routes. Maybe someone can comment on that?
> 
> Instead of using flags, call:
>                $avp(i:500) = 1; # Initialize counter of failed attempts
> 
> from your main route block, before failure route is called. 
> 
> Let us know how that works for you..
> -Brett

-- 
Sincerely,
Andrew Pogrebennyk