vpnservice/neutronvpn/neutronvpn-impl/src/main/java/org/opendaylight/netvirt/neutronvpn/NeutronRouterChangeListener.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. 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.netvirt.neutronvpn;
   9
  10 import com.google.common.base.Optional;
  11 import java.util.ArrayList;
  12 import java.util.HashMap;
  13 import java.util.Iterator;
  14 import java.util.List;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase;
  18 import org.opendaylight.genius.mdsalutil.NwConstants;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.l3.attributes.Routes;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.Routers;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.Router;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkState;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLink;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public class NeutronRouterChangeListener extends AsyncDataTreeChangeListenerBase<Router, NeutronRouterChangeListener>
  31         implements AutoCloseable {
  32     private static final Logger LOG = LoggerFactory.getLogger(NeutronRouterChangeListener.class);
  33     private final DataBroker dataBroker;
  34     private final NeutronvpnManager nvpnManager;
  35     private final NeutronvpnNatManager nvpnNatManager;
  36     private final NeutronSubnetGwMacResolver gwMacResolver;
  37
  38     public NeutronRouterChangeListener(final DataBroker dataBroker, final NeutronvpnManager neutronvpnManager,
  39                                        final NeutronvpnNatManager neutronvpnNatManager,
  40                                        NeutronSubnetGwMacResolver gwMacResolver) {
  41         super(Router.class, NeutronRouterChangeListener.class);
  42         this.dataBroker = dataBroker;
  43         nvpnManager = neutronvpnManager;
  44         nvpnNatManager = neutronvpnNatManager;
  45         this.gwMacResolver = gwMacResolver;
  46     }
  47
  48     public void start() {
  49         LOG.info("{} start", getClass().getSimpleName());
  50         registerListener(LogicalDatastoreType.CONFIGURATION, dataBroker);
  51     }
  52
  53     @Override
  54     protected InstanceIdentifier<Router> getWildCardPath() {
  55         return InstanceIdentifier.create(Neutron.class).child(Routers.class).child(Router.class);
  56     }
  57
  58     @Override
  59     protected NeutronRouterChangeListener getDataTreeChangeListener() {
  60         return NeutronRouterChangeListener.this;
  61     }
  62
  63
  64     @Override
  65     protected void add(InstanceIdentifier<Router> identifier, Router input) {
  66         LOG.trace("Adding Router : key: {}, value={}", identifier, input);
  67         NeutronvpnUtils.addToRouterCache(input);
  68         // Create internal VPN
  69         nvpnManager.createL3InternalVpn(input.getUuid(), null, null, null, null, null, input.getUuid(), null);
  70         nvpnNatManager.handleExternalNetworkForRouter(null, input);
  71         gwMacResolver.sendArpRequestsToExtGateways(input);
  72     }
  73
  74     @Override
  75     protected void remove(InstanceIdentifier<Router> identifier, Router input) {
  76         LOG.trace("Removing router : key: {}, value={}", identifier, input);
  77         Uuid routerId = input.getUuid();
  78         //NOTE: Pass an empty routerSubnetIds list, as router interfaces
  79         //will be removed from VPN by invocations from NeutronPortChangeListener
  80         List<Uuid> routerSubnetIds = new ArrayList<>();
  81         nvpnManager.handleNeutronRouterDeleted(routerId, routerSubnetIds);
  82
  83         // Handle router deletion for the NAT service
  84         if (input.getExternalGatewayInfo() != null) {
  85             Uuid extNetId = input.getExternalGatewayInfo().getExternalNetworkId();
  86             nvpnNatManager.removeExternalNetworkFromRouter(extNetId, input);
  87         }
  88         NeutronvpnUtils.removeFromRouterCache(input);
  89     }
  90
  91     @Override
  92     protected void update(InstanceIdentifier<Router> identifier, Router original, Router update) {
  93         LOG.trace("Updating Router : key: {}, original value={}, update value={}", identifier, original, update);
  94         NeutronvpnUtils.addToRouterCache(update);
  95         Uuid routerId = update.getUuid();
  96         NeutronvpnUtils.addToRouterCache(update);
  97         Uuid vpnId = NeutronvpnUtils.getVpnForRouter(dataBroker, routerId, true);
  98         // internal vpn always present in case external vpn not found
  99         if (vpnId == null) {
 100             vpnId = routerId;
 101         }
 102         List<Routes> oldRoutes = (original.getRoutes() != null) ? original.getRoutes() : new ArrayList<Routes>();
 103         List<Routes> newRoutes = (update.getRoutes() != null) ? update.getRoutes() : new ArrayList<Routes>();
 104         if (!oldRoutes.equals(newRoutes)) {
 105             Iterator<Routes> iterator = newRoutes.iterator();
 106             while (iterator.hasNext()) {
 107                 Routes route = iterator.next();
 108                 if (oldRoutes.remove(route)) {
 109                     iterator.remove();
 110                 }
 111             }
 112
 113             handleChangedRoutes(vpnId, newRoutes, NwConstants.ADD_FLOW);
 114
 115             if (!oldRoutes.isEmpty()) {
 116                 handleChangedRoutes(vpnId, oldRoutes, NwConstants.DEL_FLOW);
 117             }
 118         }
 119
 120         nvpnNatManager.handleExternalNetworkForRouter(original, update);
 121         gwMacResolver.sendArpRequestsToExtGateways(update);
 122     }
 123
 124     private void handleChangedRoutes(Uuid vpnName, List<Routes> routes, int addedOrRemoved) {
 125         // Some routes may point to an InterVpnLink's endpoint, lets treat them differently
 126         List<Routes> interVpnLinkRoutes = new ArrayList<Routes>();
 127         List<Routes> otherRoutes = new ArrayList<Routes>();
 128         HashMap<String, InterVpnLink> nexthopsXinterVpnLinks = new HashMap<String, InterVpnLink>();
 129         for ( Routes route : routes ) {
 130             String nextHop = String.valueOf(route.getNexthop().getValue());
 131             // Nexthop is another VPN?
 132             Optional<InterVpnLink> interVpnLink = NeutronvpnUtils.getInterVpnLinkByEndpointIp(dataBroker, nextHop);
 133             if ( interVpnLink.isPresent() ) {
 134                 Optional<InterVpnLinkState> interVpnLinkState =
 135                         NeutronvpnUtils.getInterVpnLinkState(dataBroker, interVpnLink.get().getName());
 136                 if ( interVpnLinkState.isPresent()
 137                     && interVpnLinkState.get().getState() == InterVpnLinkState.State.Active) {
 138                     interVpnLinkRoutes.add(route);
 139                     nexthopsXinterVpnLinks.put(nextHop, interVpnLink.get());
 140                 } else {
 141                     LOG.warn("Failed installing route to {}. Reason: InterVPNLink {} is not Active",
 142                             String.valueOf(route.getDestination().getValue()), interVpnLink.get().getName());
 143                 }
 144             } else {
 145                 otherRoutes.add(route);
 146             }
 147         }
 148
 149         if ( addedOrRemoved == NwConstants.ADD_FLOW ) {
 150             nvpnManager.addInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 151             nvpnManager.updateVpnInterfaceWithExtraRouteAdjacency(vpnName, otherRoutes);
 152         } else {
 153             nvpnManager.removeAdjacencyforExtraRoute(vpnName, otherRoutes);
 154             nvpnManager.removeInterVpnRoutes(vpnName, interVpnLinkRoutes, nexthopsXinterVpnLinks);
 155         }
 156     }
 157 }