bgp/rib-impl/src/test/java/org/opendaylight/protocol/bgp/rib/impl/AbstractAddPathTest.java

   1 /*
   2  * Copyright (c) 2016 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.protocol.bgp.rib.impl;
   9
  10 import static org.mockito.Matchers.any;
  11 import static org.mockito.Mockito.doReturn;
  12 import static org.opendaylight.protocol.util.CheckUtil.readDataOperational;
  13 import static org.opendaylight.protocol.util.CheckUtil.waitFutureSuccess;
  14
  15 import com.google.common.collect.ImmutableList;
  16 import com.google.common.collect.Lists;
  17 import io.netty.channel.epoll.Epoll;
  18 import io.netty.channel.nio.NioEventLoopGroup;
  19 import io.netty.util.concurrent.Future;
  20 import java.net.InetSocketAddress;
  21 import java.util.Collections;
  22 import java.util.List;
  23 import java.util.Set;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.concurrent.TimeUnit;
  26 import org.junit.After;
  27 import org.junit.Assert;
  28 import org.junit.Before;
  29 import org.mockito.Mock;
  30 import org.mockito.Mockito;
  31 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  32 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  33 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  34 import org.opendaylight.protocol.bgp.inet.RIBActivator;
  35 import org.opendaylight.protocol.bgp.parser.BGPError;
  36 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  37 import org.opendaylight.protocol.bgp.parser.impl.BGPActivator;
  38 import org.opendaylight.protocol.bgp.parser.spi.BGPExtensionProviderContext;
  39 import org.opendaylight.protocol.bgp.parser.spi.pojo.SimpleBGPExtensionProviderContext;
  40 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
  41 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionPreferences;
  42 import org.opendaylight.protocol.bgp.rib.spi.RIBExtensionProviderContext;
  43 import org.opendaylight.protocol.bgp.rib.spi.SimpleRIBExtensionProviderContext;
  44 import org.opendaylight.protocol.util.InetSocketAddressUtil;
  45 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
  46 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  47 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  48 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.bgp.rib.rib.loc.rib.tables.routes.Ipv4RoutesCase;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4Builder;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.routes.ipv4.routes.Ipv4Route;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv4CaseBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.NotifyBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Open;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.OpenBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.PathId;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Update;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.UpdateBuilder;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.BgpParameters;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.BgpParametersBuilder;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.bgp.parameters.OptionalCapabilities;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.bgp.parameters.OptionalCapabilitiesBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.bgp.parameters.optional.capabilities.CParametersBuilder;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.AttributesBuilder;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.AsPathBuilder;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.ClusterIdBuilder;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.LocalPrefBuilder;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.MultiExitDiscBuilder;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.OriginBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.OriginatorIdBuilder;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.as.path.SegmentsBuilder;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.update.message.WithdrawnRoutesBuilder;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes1;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes1Builder;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.BgpTableType;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.CParameters1;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.CParameters1Builder;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.SendReceive;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp.capabilities.AddPathCapabilityBuilder;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp.capabilities.MultiprotocolCapabilityBuilder;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp.capabilities.add.path.capability.AddressFamiliesBuilder;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlriBuilder;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.BgpRib;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.BgpId;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.BgpOrigin;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.ClusterIdentifier;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv4AddressFamily;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.UnicastSubsequentAddressFamily;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.next.hop.c.next.hop.Ipv4NextHopCaseBuilder;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.next.hop.c.next.hop.ipv4.next.hop._case.Ipv4NextHopBuilder;
  95 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  96 import org.opendaylight.yangtools.yang.binding.Notification;
  97
  98 public abstract class AbstractAddPathTest extends DefaultRibPoliciesMockTest {
  99     private static final int RETRY_TIMER = 10;
 100     static final String RIB_ID = "127.0.0.1";
 101     static final BgpId BGP_ID = new BgpId(RIB_ID);
 102     static final Ipv4Address PEER1 = new Ipv4Address("127.0.0.2");
 103     static final Ipv4Address PEER2 = new Ipv4Address("127.0.0.3");
 104     static final Ipv4Address PEER3 = new Ipv4Address("127.0.0.4");
 105     static final Ipv4Address PEER4 = new Ipv4Address("127.0.0.5");
 106     static final Ipv4Address PEER5 = new Ipv4Address("127.0.0.6");
 107     static final Ipv4Address PEER6 = new Ipv4Address("127.0.0.7");
 108     static final AsNumber AS_NUMBER = new AsNumber(AS);
 109     static final int PORT = InetSocketAddressUtil.getRandomPort();
 110     static final Ipv4Prefix PREFIX1 = new Ipv4Prefix("1.1.1.1/32");
 111     private static final ClusterIdentifier CLUSTER_ID = new ClusterIdentifier(RIB_ID);
 112     static final int HOLDTIMER = 2180;
 113     private static final Ipv4Address NH1 = new Ipv4Address("2.2.2.2");
 114     static final Update UPD_100 = createSimpleUpdate(PREFIX1, new PathId(1L), CLUSTER_ID, 100);
 115     static final Update UPD_50 = createSimpleUpdate(PREFIX1, new PathId(2L), CLUSTER_ID, 50);
 116     static final Update UPD_200 = createSimpleUpdate(PREFIX1, new PathId(3L), CLUSTER_ID, 200);
 117     static final Update UPD_20 = createSimpleUpdate(PREFIX1, new PathId(1L), CLUSTER_ID, 20);
 118     static final Update UPD_NA_100 = createSimpleUpdate(PREFIX1, null, CLUSTER_ID, 100);
 119     static final Update UPD_NA_100_EBGP = createSimpleUpdateEbgp(PREFIX1);
 120     static final Update UPD_NA_200 = createSimpleUpdate(PREFIX1, null, CLUSTER_ID, 200);
 121     static final Update UPD_NA_200_EBGP = createSimpleUpdateEbgp(PREFIX1);
 122     static final TablesKey TABLES_KEY = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
 123     static final List<BgpTableType> TABLES_TYPE = ImmutableList.of(new BgpTableTypeImpl(TABLES_KEY.getAfi(),
 124         TABLES_KEY.getSafi()));
 125     static final Set<TablesKey> AFI_SAFIS_ADVERTIZED = Collections.singleton(TABLES_KEY);
 126     private BGPExtensionProviderContext context;
 127     private static final InstanceIdentifier<BgpRib> BGP_IID = InstanceIdentifier.create(BgpRib.class);
 128     @Mock
 129     protected ClusterSingletonServiceProvider clusterSingletonServiceProvider;
 130     BGPDispatcherImpl serverDispatcher;
 131     RIBExtensionProviderContext ribExtension;
 132     private RIBActivator ribActivator;
 133     private BGPActivator bgpActivator;
 134     private NioEventLoopGroup worker;
 135     private NioEventLoopGroup boss;
 136     private org.opendaylight.protocol.bgp.inet.BGPActivator inetActivator;
 137     protected StrictBGPPeerRegistry serverRegistry;
 138     protected final BGPPeerTrackerImpl peerTracker = new BGPPeerTrackerImpl();
 139     protected CodecsRegistryImpl codecsRegistry;
 140
 141     @Before
 142     public void setUp() throws Exception {
 143         super.setUp();
 144         this.ribActivator = new RIBActivator();
 145         this.ribExtension = new SimpleRIBExtensionProviderContext();
 146
 147         this.ribActivator.startRIBExtensionProvider(this.ribExtension, this.mappingService);
 148
 149         this.bgpActivator = new BGPActivator();
 150         this.inetActivator = new org.opendaylight.protocol.bgp.inet.BGPActivator();
 151         this.context = new SimpleBGPExtensionProviderContext();
 152         this.bgpActivator.start(this.context);
 153         this.inetActivator.start(this.context);
 154         if (!Epoll.isAvailable()) {
 155             this.worker = new NioEventLoopGroup();
 156             this.boss = new NioEventLoopGroup();
 157         }
 158         this.serverRegistry = new StrictBGPPeerRegistry();
 159         this.serverDispatcher = new BGPDispatcherImpl(this.context.getMessageRegistry(), this.boss, this.worker,
 160             this.serverRegistry);
 161         doReturn(Mockito.mock(ClusterSingletonServiceRegistration.class)).when(this.clusterSingletonServiceProvider)
 162             .registerClusterSingletonService(any(ClusterSingletonService.class));
 163
 164         this.codecsRegistry = CodecsRegistryImpl.create(this.mappingService.getCodecFactory(),
 165                 this.ribExtension.getClassLoadingStrategy());
 166     }
 167
 168     @After
 169     public void tearDown() throws ExecutionException, InterruptedException {
 170         this.serverDispatcher.close();
 171         if (!Epoll.isAvailable()) {
 172             this.worker.shutdownGracefully(0, 0, TimeUnit.SECONDS);
 173             this.boss.shutdownGracefully(0, 0, TimeUnit.SECONDS);
 174         }
 175         this.mappingService.close();
 176         this.ribActivator.close();
 177         this.inetActivator.close();
 178         this.bgpActivator.close();
 179     }
 180
 181     void sendRouteAndCheckIsOnLocRib(final BGPSessionImpl session, final Ipv4Prefix prefix, final long localPreference,
 182         final int expectedRoutesOnDS) throws Exception {
 183         waitFutureSuccess(session.writeAndFlush(createSimpleUpdate(prefix, null, null, localPreference)));
 184         checkLocRib(expectedRoutesOnDS);
 185     }
 186
 187     void sendWithdrawalRouteAndCheckIsOnLocRib(final BGPSessionImpl session, final Ipv4Prefix prefix,
 188         final long localPreference, final int expectedRoutesOnDS) throws Exception {
 189         waitFutureSuccess(session.writeAndFlush(createSimpleWithdrawalUpdate(prefix, localPreference)));
 190         checkLocRib(expectedRoutesOnDS);
 191     }
 192
 193     void sendNotification(final BGPSessionImpl session) {
 194         final Notification notMsg = new NotifyBuilder().setErrorCode(BGPError.OPT_PARAM_NOT_SUPPORTED.getCode())
 195             .setErrorSubcode(BGPError.OPT_PARAM_NOT_SUPPORTED.getSubcode()).setData(new byte[] { 4, 9 }).build();
 196         waitFutureSuccess(session.writeAndFlush(notMsg));
 197     }
 198
 199     void causeBGPError(final BGPSessionImpl session) {
 200         final Open openObj = new OpenBuilder().setBgpIdentifier(new Ipv4Address("1.1.1.1"))
 201             .setHoldTimer(50).setMyAsNumber(72).build();
 202         waitFutureSuccess(session.writeAndFlush(openObj));
 203     }
 204
 205     private void checkLocRib(final int expectedRoutesOnDS) throws Exception {
 206         Thread.sleep(100);
 207         readDataOperational(getDataBroker(), BGP_IID, bgpRib -> {
 208             final Ipv4RoutesCase routes = (Ipv4RoutesCase) bgpRib.getRib().get(0).getLocRib().getTables().get(0)
 209                 .getRoutes();
 210             final List<Ipv4Route> routeList = routes.getIpv4Routes().getIpv4Route();
 211             Assert.assertEquals(expectedRoutesOnDS, routeList.size());
 212             return bgpRib;
 213         });
 214     }
 215
 216     void checkPeersPresentOnDataStore(final int numberOfPeers) throws Exception {
 217         readDataOperational(getDataBroker(), BGP_IID, bgpRib -> {
 218             Assert.assertEquals(numberOfPeers, bgpRib.getRib().get(0).getPeer().size());
 219             return bgpRib;
 220         });
 221     }
 222
 223     BGPSessionImpl createPeerSession(final Ipv4Address peer, final BgpParameters bgpParameters,
 224         final SimpleSessionListener sessionListener) throws InterruptedException {
 225         final StrictBGPPeerRegistry clientRegistry = new StrictBGPPeerRegistry();
 226         final BGPDispatcherImpl clientDispatcher = new BGPDispatcherImpl(this.context.getMessageRegistry(), this.boss,
 227             this.worker, clientRegistry);
 228         clientRegistry.addPeer(new IpAddress(new Ipv4Address(RIB_ID)), sessionListener,
 229             new BGPSessionPreferences(AS_NUMBER, HOLDTIMER, new BgpId(peer),
 230                 AS_NUMBER, Lists.newArrayList(bgpParameters)));
 231
 232         return connectPeer(peer, clientDispatcher);
 233     }
 234
 235     protected static BGPPeer configurePeer(final Ipv4Address peerAddress, final RIBImpl ribImpl,
 236         final BgpParameters bgpParameters, final PeerRole peerRole, final BGPPeerRegistry bgpPeerRegistry) {
 237         final IpAddress ipAddress = new IpAddress(peerAddress);
 238
 239         final BGPPeer bgpPeer = new BGPPeer(new IpAddress(peerAddress), ribImpl, peerRole, null,
 240             AFI_SAFIS_ADVERTIZED, Collections.emptySet());
 241         final List<BgpParameters> tlvs = Lists.newArrayList(bgpParameters);
 242         bgpPeerRegistry.addPeer(ipAddress, bgpPeer,
 243             new BGPSessionPreferences(AS_NUMBER, HOLDTIMER, new BgpId(RIB_ID), AS_NUMBER, tlvs));
 244         bgpPeer.instantiateServiceInstance();
 245         return bgpPeer;
 246     }
 247
 248     private static BGPSessionImpl connectPeer(final Ipv4Address localAddress, final BGPDispatcherImpl dispatcherImpl)
 249         throws InterruptedException {
 250         final Future<BGPSessionImpl> future = dispatcherImpl.createClient(new InetSocketAddress(localAddress.getValue(), PORT),
 251             new InetSocketAddress(RIB_ID, PORT), RETRY_TIMER, true);
 252         Thread.sleep(200);
 253         waitFutureSuccess(future);
 254         Thread.sleep(100);
 255         return future.getNow();
 256     }
 257
 258     protected static BgpParameters createParameter(final boolean addPath) {
 259         final OptionalCapabilities mp = new OptionalCapabilitiesBuilder().setCParameters(
 260             new CParametersBuilder().addAugmentation(CParameters1.class,
 261                 new CParameters1Builder().setMultiprotocolCapability(
 262                     new MultiprotocolCapabilityBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class)
 263                         .build()).build()).build()).build();
 264         final List<OptionalCapabilities> capabilities = Lists.newArrayList(mp);
 265         if (addPath) {
 266             final OptionalCapabilities addPathCapa = new OptionalCapabilitiesBuilder().setCParameters(
 267                 new CParametersBuilder().addAugmentation(CParameters1.class,
 268                     new CParameters1Builder().setAddPathCapability(
 269                         new AddPathCapabilityBuilder().setAddressFamilies(Lists.newArrayList(
 270                             new AddressFamiliesBuilder()
 271                                 .setAfi(Ipv4AddressFamily.class)
 272                                 .setSafi(UnicastSubsequentAddressFamily.class)
 273                                 .setSendReceive(SendReceive.Both)
 274                                 .build()))
 275                             .build()).build()).build()).build();
 276             capabilities.add(addPathCapa);
 277         }
 278         return new BgpParametersBuilder().setOptionalCapabilities(capabilities).build();
 279     }
 280
 281     private static Update createSimpleUpdate(final Ipv4Prefix prefix, final PathId pathId, final ClusterIdentifier clusterId,
 282         final long localPreference) {
 283         final AttributesBuilder attBuilder = new AttributesBuilder();
 284         attBuilder.setLocalPref(new LocalPrefBuilder().setPref(localPreference).build());
 285         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 286         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.emptyList()).build());
 287         attBuilder.setMultiExitDisc(new MultiExitDiscBuilder().setMed(0L).build());
 288         if (clusterId != null) {
 289             attBuilder.setClusterId(new ClusterIdBuilder().setCluster(Collections.singletonList(clusterId)).build());
 290             attBuilder.setOriginatorId(new OriginatorIdBuilder().setOriginator(new Ipv4Address(clusterId)).build());
 291         }
 292         addAttributeAugmentation(attBuilder, prefix, pathId);
 293         return new UpdateBuilder().setAttributes(attBuilder.build()).build();
 294     }
 295
 296     private static Update createSimpleUpdateEbgp(final Ipv4Prefix prefix) {
 297         final AttributesBuilder attBuilder = new AttributesBuilder();
 298         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 299         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.singletonList(
 300             new SegmentsBuilder().setAsSequence(Collections.singletonList(AS_NUMBER)).build())).build());
 301         addAttributeAugmentation(attBuilder, prefix, null);
 302
 303         return new UpdateBuilder().setAttributes(attBuilder.build()).build();
 304     }
 305
 306     private static void addAttributeAugmentation(final AttributesBuilder attBuilder, final Ipv4Prefix prefix,
 307         final PathId pathId) {
 308         attBuilder.setUnrecognizedAttributes(Collections.emptyList());
 309         attBuilder.addAugmentation(Attributes1.class,
 310             new Attributes1Builder().setMpReachNlri(
 311                 new MpReachNlriBuilder()
 312                     .setCNextHop(new Ipv4NextHopCaseBuilder().setIpv4NextHop(new Ipv4NextHopBuilder().setGlobal(NH1)
 313                         .build()).build())
 314                     .setAfi(Ipv4AddressFamily.class)
 315                     .setSafi(UnicastSubsequentAddressFamily.class)
 316                     .setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(
 317                         new DestinationIpv4CaseBuilder().setDestinationIpv4(
 318                             new DestinationIpv4Builder().setIpv4Prefixes(Collections.singletonList(
 319                                 new Ipv4PrefixesBuilder().setPathId(pathId).setPrefix(new Ipv4Prefix(prefix)).build()))
 320                                 .build())
 321                             .build()).build())
 322                     .build()).build());
 323     }
 324
 325     private static Update createSimpleWithdrawalUpdate(final Ipv4Prefix prefix, final long localPreference) {
 326         final AttributesBuilder attBuilder = new AttributesBuilder();
 327         attBuilder.setLocalPref(new LocalPrefBuilder().setPref(localPreference).build());
 328         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 329         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.emptyList()).build());
 330         attBuilder.setUnrecognizedAttributes(Collections.emptyList());
 331         return new UpdateBuilder()
 332                 .setWithdrawnRoutes(Collections.singletonList(new WithdrawnRoutesBuilder().setPrefix(prefix).build()))
 333                 .build();
 334     }
 335 }