[%
import "header.egl";
import "utils.egl";
import "condition.egl";
import "firewall.egl";
import "monitor.egl";
%]

[% var header = getCodeHeader(); %]
[%=header%]
[% var counterActionDrop : Integer = 0; %]
def mdn_handler (event):

  # Handles packet events and kills the ones with blocked property
  packet = event.parsed

[%
for (policy in Policy.all) {
  if (policy.policyAction.isDefined()) {
    if (policy.policyAction.type.value = Actions#DROP.value) {
      if (counterActionDrop == 0) {
        counterActionDrop = counterActionDrop + 1;
      }
      actionDrop(policy);
    }
    //IF ACTION EQUALS TO MONITOR
    if (policy.policyAction.type.value = Actions#MONITOR.value) {
      if (counterActionMonitor == 0) {
        counterActionMonitor = counterActionMonitor + 1;
      }
      monitorAction(policy);
    }
  }
}
%]
[...]
def launch ():
[% if (counterActionDrop > 0) { %]
  core.openflow.addListenerByName("PacketIn", mdn_handler)
[% } %]