If the incoming node port is blocked, allow only unicast and BDDP packets to...

If the incoming node port is blocked, allow only unicast and BDDP packets to continue down the processing chain.

src/main/java/net/floodlightcontroller/devicemanager/internal/DeviceManagerImpl.java

@@ -821,14 +821,18 @@ public class DeviceManagerImpl implements IDeviceManagerService, IOFMessageListe
         // in this situation.
         short pinPort = pi.getInPort();
         long pinSw = sw.getId();
-        if (eth.getEtherType() != Ethernet.TYPE_BDDP && 
-                topology.isAllowed(pinSw, pinPort) == false) {
-            if (log.isDebugEnabled()) {
-                log.debug("deviceManager: Stopping packet as it is coming" +
-                        "in on a port blocked by higher layer on." + 
-                        "switch ={}, port={}", new Object[] {sw.getStringId(), pinPort});
+        if (topology.isAllowed(pinSw, pinPort) == false) {
+            if (eth.getEtherType() != Ethernet.TYPE_BDDP ||
+                    eth.isMulticast() == false) {
+                return Command.CONTINUE;
+            } else {
+                if (log.isDebugEnabled()) {
+                    log.debug("deviceManager: Stopping packet as it is coming" +
+                            "in on a port blocked by higher layer on." +
+                            "switch ={}, port={}", new Object[] {sw.getStringId(), pinPort});
+                }
+                return Command.STOP;
             }
-            return Command.STOP;
         }
 
         Command ret = Command.CONTINUE;