Hi folks,
Trying to implement CPS throttling based on this https://lists.kamailio.org/pipermail/sr-users/2013-September/079713.htmlarticle, 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