+
+ private void enqueueARPCacheEvent (ARPEvent event, boolean new_value) {
+ try {
+ ARPCacheEvent cacheEvent = new ARPCacheEvent(event, new_value);
+ if (!ARPCacheEvents.contains(cacheEvent)) {
+ this.ARPCacheEvents.add(cacheEvent);
+ }
+ } catch (Exception e) {
+ log.debug("enqueueARPCacheEvent caught Interrupt Exception for event {}", event);
+ }
+ }
+
+ /*
+ * this thread monitors the connectionEvent queue for new incoming events from
+ */
+ private class ARPCacheEventHandler implements Runnable {
+ @Override
+ public void run() {
+ while (true) {
+ try {
+ ARPCacheEvent ev = ARPCacheEvents.take();
+ ARPEvent event = ev.getEvent();
+ if (event instanceof ARPRequest) {
+ ARPRequest req = (ARPRequest) event;
+ // If broadcast request
+ if (req.getHost() == null) {
+ sendBcastARPRequest(req.getTargetIP(), req.getSubnet());
+
+ //If unicast and local, send reply
+ } else if (connectionManager.isLocal(req.getHost().getnodeconnectorNode())) {
+ sendUcastARPRequest(req.getHost(), req.getSubnet());
+ }
+ } else if (event instanceof ARPReply) {
+ ARPReply rep = (ARPReply) event;
+ // New reply received by controller, notify all awaiting requestors across the cluster
+ if (ev.isNewReply()) {
+ generateAndSendReply(rep.getTargetIP(), rep.getTargetMac());
+
+ // Otherwise, a specific reply. If local, send out.
+ } else if (connectionManager.isLocal(rep.getPort().getNode())) {
+ sendARPReply(rep.getPort(),
+ rep.getSourceMac(),
+ rep.getSourceIP(),
+ rep.getTargetMac(),
+ rep.getTargetIP());
+ }
+ }
+ } catch (InterruptedException e) {
+ ARPCacheEvents.clear();
+ return;
+ }
+ }
+ }
+ }