applications/topology-lldp-discovery/src/main/java/org/opendaylight/openflowplugin/applications/topology/lldp/LLDPDiscoveryListener.java

   1 /**
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.openflowplugin.applications.topology.lldp;
   9
  10 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  11 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipService;
  12 import org.opendaylight.openflowplugin.applications.topology.lldp.utils.LLDPDiscoveryUtils;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkDiscovered;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkDiscoveredBuilder;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorRef;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketProcessingListener;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 public class LLDPDiscoveryListener implements PacketProcessingListener {
  24     private static final Logger LOG = LoggerFactory.getLogger(LLDPDiscoveryListener.class);
  25
  26     private final LLDPLinkAger lldpLinkAger;
  27     private final NotificationProviderService notificationService;
  28     private final EntityOwnershipService eos;
  29
  30
  31     public LLDPDiscoveryListener(final NotificationProviderService notificationService, final LLDPLinkAger lldpLinkAger,
  32             final EntityOwnershipService entityOwnershipService) {
  33         this.notificationService = notificationService;
  34         this.lldpLinkAger = lldpLinkAger;
  35         this.eos = entityOwnershipService;
  36     }
  37
  38     @Override
  39     public void onPacketReceived(PacketReceived lldp) {
  40         NodeConnectorRef src = LLDPDiscoveryUtils.lldpToNodeConnectorRef(lldp.getPayload(), true);
  41         if (src != null) {
  42             NodeKey nodeKey = src.getValue().firstKeyOf(Node.class);
  43             LOG.debug("LLDP packet received for node {}", nodeKey);
  44             if (nodeKey != null) {
  45                 LinkDiscoveredBuilder ldb = new LinkDiscoveredBuilder();
  46                 ldb.setDestination(lldp.getIngress());
  47                 ldb.setSource(new NodeConnectorRef(src));
  48                 LinkDiscovered ld = ldb.build();
  49
  50                 lldpLinkAger.put(ld);
  51                 if (LLDPDiscoveryUtils.isEntityOwned(this.eos, nodeKey.getId().getValue())) {
  52                     LOG.debug("Publish add event for link {}", ld);
  53                     notificationService.publish(ld);
  54                 } else {
  55                     LOG.trace("Skip publishing the add event for link because controller is non-owner of the " +
  56                             "node {}. Link : {}", nodeKey.getId().getValue(), ld);
  57                 }
  58             } else {
  59                 LOG.debug("LLDP packet ignored. Unable to extract node-key from source node-connector reference.");
  60             }
  61         }
  62     }
  63 }