Hi folks,

Trying to implement CPS throttling based on this article, having some trouble.

modparam("htable", "htable", "rhs=>size=32;initval=0;autoexpire=300;"

modparam("htable", "htable", "rhm=>size=32;initval=0;autoexpire=1800;")

route[CPS] {

$var(rateHashSec) = $si+":sec:"+$timef(%Y/%m/%d_%H_%M_%S);

$var(rateHashMin) = $si+":min:"+$timef(%Y/%m/%d_%H_%M_00);

xlog("L_INFO", "var(rateHashSec)=$var(rateHashSec); var(rateHashMin)=$var(rateHashMin)\n");

$var(ratePerSec) = $shtinc(rhs=>$var(rateHashSec));

$var(ratePerMin) = $shtinc(rhm=>$var(rateHashMin));

xlog("L_INFO", "var(ratePerSec)=$var(ratePerSec); var(ratePerMin)=$var(ratePerMin)\n");

$var(limitPerSec) = 1;

$var(limitPerMin) = 1;

if ($var(ratePerSec) > $var(limitPerSec) || $var(ratePerMin) > $var(limitPerMin)) {
xlog("L_INFO", "CPS Limit on IP $si\n");
send_reply("503", "CPS Limit on IP $si");
exit;
}

}

Logs show hashes are created but $var(ratePerSec/Min) won't increment no matter how many calls I place per second or minute:

Jul 9 14:35:52 proxy /usr/local/sbin/kamailio[1484]: INFO: <script>: var(rateHashSec)=65.39.XX.XX:sec:2018/07/09_14_35_52; var(rateHashMin)=65.39.XX.XX:min:2018/07/09_14_35_00

Jul 9 14:35:52 proxy /usr/local/sbin/kamailio[1484]: INFO: <script>: var(ratePerSec)=0; var(ratePerMin)=0

Much obliged.

--Sergiu