[ONOS-3952] Implement FloatingIP Handler for OpenstackRoutingService

 - Implements floatingIp REST interfaces & event handler
 - Implements rulePopulate method for floatingIp handler
 - Fixes minor logics
 - Changes app structure
 - exports configuration
 - Implements case issue.
   when openstack deletes vm w/o deassociating floatingIp,
   openstack doesn`t send floatingIp deassociation event.

Change-Id: If4d8ac3fecfed1957d84139f94ae31f593a9097b

@@ -80,5 +80,11 @@ public interface OpenstackRoutingService {
      */
     void removeRouterInterface(OpenstackRouterInterface openstackRouterInterface);
 
-
+    /**
+     * Checks floatingIp deassociation when corresponding deleted vm.
+     *
+     * @param portId Deleted vm
+     * @param portInfo
+     */
+    void checkDisassociatedFloatingIp(String portId, OpenstackPortInfo portInfo);
 }

@@ -15,20 +15,34 @@
  */
 package org.onosproject.openstacknetworking.routing;
 
-        import org.onosproject.event.AbstractEvent;
+import org.onosproject.openstackinterface.OpenstackFloatingIP;
+import org.onosproject.openstacknetworking.OpenstackPortInfo;
 
 /**
  * Handle FloatingIP Event for Managing Flow Rules In Openstack Nodes.
  */
 public class OpenstackFloatingIPHandler implements Runnable {
 
-    volatile AbstractEvent event;
-    OpenstackFloatingIPHandler(AbstractEvent event) {
-        this.event = event;
+    private final OpenstackFloatingIP floatingIP;
+    private final OpenstackRoutingRulePopulator rulePopulator;
+    private boolean associate;
+    private final OpenstackPortInfo portInfo;
+
+    OpenstackFloatingIPHandler(OpenstackRoutingRulePopulator rulePopulator,
+                               OpenstackFloatingIP openstackFloatingIP, boolean associate, OpenstackPortInfo portInfo) {
+        this.floatingIP = openstackFloatingIP;
+        this.rulePopulator = rulePopulator;
+        this.associate = associate;
+        this.portInfo = portInfo;
     }
 
     @Override
     public void run() {
+        if (associate) {
+            rulePopulator.populateFloatingIpRules(floatingIP);
+        } else {
+            rulePopulator.removeFloatingIpRules(floatingIP, portInfo);
+        }
 
     }
 }

@@ -56,19 +56,18 @@ public class OpenstackPnatHandler implements Runnable {
     private final int portNum;
     private final OpenstackPort openstackPort;
     private final Port port;
+    private OpenstackRoutingConfig config;
 
     private static final String DEVICE_OWNER_ROUTER_INTERFACE = "network:router_interface";
-    // TODO: This will be replaced to get the information from openstacknetworkingservice.
-    private static final MacAddress GATEWAYMAC = MacAddress.valueOf("1f:1f:1f:1f:1f:1f");
-    private static final MacAddress EXTERNAL_INTERFACE_MAC = MacAddress.valueOf("00:00:00:00:00:11");
 
     OpenstackPnatHandler(OpenstackRoutingRulePopulator rulePopulator, PacketContext context,
-                         int portNum, OpenstackPort openstackPort, Port port) {
+                         int portNum, OpenstackPort openstackPort, Port port, OpenstackRoutingConfig config) {
         this.rulePopulator = checkNotNull(rulePopulator);
         this.context = checkNotNull(context);
         this.portNum = checkNotNull(portNum);
         this.openstackPort = checkNotNull(openstackPort);
         this.port = checkNotNull(port);
+        this.config = checkNotNull(config);
     }
 
     @Override
@@ -85,7 +84,8 @@ public class OpenstackPnatHandler implements Runnable {
         OpenstackRouter router = getOpenstackRouter(openstackPort);
 
         rulePopulator.populatePnatFlowRules(inboundPacket, openstackPort, portNum,
-                getExternalIp(router), getExternalInterfaceMacAddress(), getExternalRouterMacAddress());
+                getExternalIp(router), MacAddress.valueOf(config.gatewayExternalInterfaceMac()),
+                MacAddress.valueOf(config.physicalRouterMac()));
 
         packetOut((Ethernet) ethernet.clone(), inboundPacket.receivedFrom().deviceId(), portNum, router);
     }
@@ -144,8 +144,9 @@ public class OpenstackPnatHandler implements Runnable {
         iPacket.setSourceAddress(getExternalIp(router).toString());
         iPacket.resetChecksum();
         iPacket.setParent(ethernet);
-        ethernet.setSourceMACAddress(getExternalInterfaceMacAddress())
-                .setDestinationMACAddress(getExternalRouterMacAddress());
+        ethernet.setPayload(iPacket);
+        ethernet.setSourceMACAddress(config.gatewayExternalInterfaceMac())
+                .setDestinationMACAddress(config.physicalRouterMac());
         ethernet.resetChecksum();
 
         treatment.setOutput(port.number());
@@ -153,11 +154,4 @@ public class OpenstackPnatHandler implements Runnable {
         packetService.emit(new DefaultOutboundPacket(deviceId, treatment.build(),
                 ByteBuffer.wrap(ethernet.serialize())));
     }
-
-    private MacAddress getExternalInterfaceMacAddress() {
-        return EXTERNAL_INTERFACE_MAC;
-    }
-    private MacAddress getExternalRouterMacAddress() {
-        return GATEWAYMAC;
-    }
 }
\ No newline at end of file

@@ -19,6 +19,8 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.onosproject.openstackinterface.OpenstackPort;
 import org.onosproject.openstackinterface.web.OpenstackPortCodec;
+import org.onosproject.openstacknetworking.OpenstackPortInfo;
+import org.onosproject.openstacknetworking.OpenstackRoutingService;
 import org.onosproject.openstacknetworking.OpenstackSwitchingService;
 import org.onosproject.rest.AbstractWebResource;
 import org.slf4j.Logger;
@@ -42,7 +44,7 @@ import java.io.InputStream;
 public class OpenstackPortWebResource extends AbstractWebResource {
 
     private final Logger log = LoggerFactory.getLogger(getClass());
-
+    private static final String PORTNAME_PREFIX_VM = "tap";
     private static final OpenstackPortCodec PORT_CODEC = new OpenstackPortCodec();
 
     @POST
@@ -75,7 +77,14 @@ public class OpenstackPortWebResource extends AbstractWebResource {
     public Response deletePorts(@PathParam("portUUID") String id) {
         OpenstackSwitchingService switchingService =
                 getService(OpenstackSwitchingService.class);
+        OpenstackPortInfo portInfo = switchingService.openstackPortInfo()
+                .get(PORTNAME_PREFIX_VM.concat(id.substring(0, 11)));
+        OpenstackRoutingService routingService =
+                getService(OpenstackRoutingService.class);
+        routingService.checkDisassociatedFloatingIp(id, portInfo);
+
         switchingService.removePort(id);
+
         return Response.status(Response.Status.OK).build();
     }