Add passDDDFilter method within DDD

js/ddd.js

@@ -11,6 +11,7 @@ export class DDD extends Entity {
         // Bind methods
         this.sendPackets = this.sendPackets.bind(this);
         this.passPortFilter = this.passPortFilter.bind(this);
+        this.passDDDFilter = this.passDDDFilter.bind(this);
         this.openNewPorts = this.openNewPorts.bind(this);
 
     }
@@ -45,6 +46,10 @@ export class DDD extends Entity {
         return this.openPorts.includes(packet.dstPort);
     }
 
+    passDDDFilter(packet){
+        return false;
+    }
+
     sendPackets(dstEntity = undefined) {
         // Send packet from srcEntity to dstEntity. If dstEntity undefined, then send to nextEntity
         if (!dstEntity) {
@@ -56,7 +61,7 @@ export class DDD extends Entity {
         for (let i = 0; i < this.packetsPerTimeUnit; ++i) {
             let packet = this.dequeue();
             if (packet) {
-                if (!this.passPortFilter(packet)) {
+                if (!this.passDDDFilter(packet)) {
                     packet.dropped = true;
                     this.garbage.enqueue(packet);
                 }