natservice/impl/src/main/java/org/opendaylight/netvirt/natservice/internal/SubnetGwMacChangeListener.java

   1 /*
   2  * Copyright (c) 2016 Hewlett Packard Enterprise, Co. 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
   9 package org.opendaylight.netvirt.natservice.internal;
  10
  11 import java.net.Inet6Address;
  12 import java.net.InetAddress;
  13 import java.net.UnknownHostException;
  14 import javax.annotation.PostConstruct;
  15 import javax.inject.Inject;
  16 import javax.inject.Singleton;
  17 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase;
  20 import org.opendaylight.netvirt.neutronvpn.interfaces.INeutronVpnManager;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.LearntVpnVipToPortData;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.learnt.vpn.vip.to.port.data.LearntVpnVipToPort;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 @Singleton
  31 public class SubnetGwMacChangeListener
  32     extends AsyncDataTreeChangeListenerBase<LearntVpnVipToPort, SubnetGwMacChangeListener> {
  33     private static final Logger LOG = LoggerFactory.getLogger(SubnetGwMacChangeListener.class);
  34
  35     private final DataBroker broker;
  36     private final INeutronVpnManager nvpnManager;
  37     private final ExternalNetworkGroupInstaller extNetworkInstaller;
  38
  39     @Inject
  40     public SubnetGwMacChangeListener(final DataBroker broker, final INeutronVpnManager nvpnManager,
  41                                      final ExternalNetworkGroupInstaller extNetworkInstaller) {
  42         super(LearntVpnVipToPort.class, SubnetGwMacChangeListener.class);
  43         this.broker = broker;
  44         this.nvpnManager = nvpnManager;
  45         this.extNetworkInstaller = extNetworkInstaller;
  46     }
  47
  48     @PostConstruct
  49     public void init() {
  50         registerListener(LogicalDatastoreType.OPERATIONAL, broker);
  51     }
  52
  53     @Override
  54     protected InstanceIdentifier<LearntVpnVipToPort> getWildCardPath() {
  55         return InstanceIdentifier.builder(LearntVpnVipToPortData.class).child(LearntVpnVipToPort.class).build();
  56     }
  57
  58     @Override
  59     protected void remove(InstanceIdentifier<LearntVpnVipToPort> key, LearntVpnVipToPort learntVpnVipToPort) {
  60     }
  61
  62     @Override
  63     protected void update(InstanceIdentifier<LearntVpnVipToPort> key, LearntVpnVipToPort origLearntVpnVipToPort,
  64                           LearntVpnVipToPort updatedLearntVpnVipToPort) {
  65         handleSubnetGwIpChange(updatedLearntVpnVipToPort);
  66     }
  67
  68     @Override
  69     protected void add(InstanceIdentifier<LearntVpnVipToPort> key, LearntVpnVipToPort learntVpnVipToPort) {
  70         handleSubnetGwIpChange(learntVpnVipToPort);
  71     }
  72
  73     @Override
  74     protected SubnetGwMacChangeListener getDataTreeChangeListener() {
  75         return this;
  76     }
  77
  78     private void handleSubnetGwIpChange(LearntVpnVipToPort learntVpnVipToPort) {
  79         String macAddress = learntVpnVipToPort.getMacAddress();
  80         if (macAddress == null) {
  81             LOG.error("handleSubnetGwIpChange : Mac address is null for LearntVpnVipToPort for vpn {} prefix {}",
  82                 learntVpnVipToPort.getVpnName(), learntVpnVipToPort.getPortFixedip());
  83             return;
  84         }
  85
  86         String fixedIp = learntVpnVipToPort.getPortFixedip();
  87         if (fixedIp == null) {
  88             LOG.error("handleSubnetGwIpChange : Fixed ip is null for LearntVpnVipToPort for vpn {}",
  89                 learntVpnVipToPort.getVpnName());
  90             return;
  91         }
  92
  93         try {
  94             InetAddress address = InetAddress.getByName(fixedIp);
  95             if (address instanceof Inet6Address) {
  96                 // TODO: Revisit when IPv6 North-South communication support is added.
  97                 LOG.debug("handleSubnetGwIpChange : Skipping ipv6 address {}.", address);
  98                 return;
  99             }
 100         } catch (UnknownHostException e) {
 101             LOG.warn("handleSubnetGwIpChange : Invalid ip address {}", fixedIp, e);
 102             return;
 103         }
 104
 105         for (Uuid subnetId : nvpnManager.getSubnetIdsForGatewayIp(new IpAddress(new Ipv4Address(fixedIp)))) {
 106             LOG.trace("handleSubnetGwIpChange : Updating MAC resolution on vpn {} for GW ip {} to {}",
 107                     learntVpnVipToPort.getVpnName(), fixedIp, macAddress);
 108             extNetworkInstaller.installExtNetGroupEntries(subnetId, macAddress);
 109         }
 110     }
 111 }