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.ArgumentMatchers.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.Map;
  24 import java.util.Set;
  25 import java.util.concurrent.ExecutionException;
  26 import java.util.concurrent.TimeUnit;
  27 import org.junit.After;
  28 import org.junit.Assert;
  29 import org.junit.Before;
  30 import org.mockito.Mock;
  31 import org.mockito.Mockito;
  32 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  33 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  34 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  35 import org.opendaylight.protocol.bgp.inet.RIBActivator;
  36 import org.opendaylight.protocol.bgp.openconfig.spi.BGPTableTypeRegistryConsumer;
  37 import org.opendaylight.protocol.bgp.parser.BGPError;
  38 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  39 import org.opendaylight.protocol.bgp.parser.impl.BGPActivator;
  40 import org.opendaylight.protocol.bgp.parser.spi.BGPExtensionProviderContext;
  41 import org.opendaylight.protocol.bgp.parser.spi.pojo.SimpleBGPExtensionProviderContext;
  42 import org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer;
  43 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPPeerRegistry;
  44 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionPreferences;
  45 import org.opendaylight.protocol.bgp.rib.spi.RIBExtensionProviderContext;
  46 import org.opendaylight.protocol.bgp.rib.spi.SimpleRIBExtensionProviderContext;
  47 import org.opendaylight.protocol.util.InetSocketAddressUtil;
  48 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
  49 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  50 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  51 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.bgp.rib.rib.loc.rib.tables.routes.Ipv4RoutesCase;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4Builder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.routes.Ipv4Routes;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.routes.ipv4.routes.Ipv4Route;
  57 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;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.NotifyBuilder;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Open;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.OpenBuilder;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.PathId;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Update;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.UpdateBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.BgpParameters;
  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.update.attributes.MpReachNlriBuilder;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.BgpRib;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.BgpId;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.BgpOrigin;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.ClusterIdentifier;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv4AddressFamily;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv6AddressFamily;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.UnicastSubsequentAddressFamily;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.next.hop.c.next.hop.Ipv4NextHopCaseBuilder;
  89 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;
  90 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  91 import org.opendaylight.yangtools.yang.binding.Notification;
  92
  93 public abstract class AbstractAddPathTest extends DefaultRibPoliciesMockTest {
  94     private static final int RETRY_TIMER = 10;
  95     static final String RIB_ID = "127.0.0.1";
  96     static final BgpId BGP_ID = new BgpId(RIB_ID);
  97     static final Ipv4Address PEER1 = new Ipv4Address("127.0.0.2");
  98     static final Ipv4Address PEER2 = new Ipv4Address("127.0.0.3");
  99     static final Ipv4Address PEER3 = new Ipv4Address("127.0.0.4");
 100     static final Ipv4Address PEER4 = new Ipv4Address("127.0.0.5");
 101     static final Ipv4Address PEER5 = new Ipv4Address("127.0.0.6");
 102     static final Ipv4Address PEER6 = new Ipv4Address("127.0.0.7");
 103     static final AsNumber AS_NUMBER = new AsNumber(AS);
 104     static final int PORT = InetSocketAddressUtil.getRandomPort();
 105     static final Ipv4Prefix PREFIX1 = new Ipv4Prefix("1.1.1.1/32");
 106     private static final ClusterIdentifier CLUSTER_ID = new ClusterIdentifier(RIB_ID);
 107     static final int HOLDTIMER = 2180;
 108     private static final Ipv4Address NH1 = new Ipv4Address("2.2.2.2");
 109     static final Update UPD_100 = createSimpleUpdate(PREFIX1, new PathId(1L), CLUSTER_ID, 100);
 110     static final Update UPD_50 = createSimpleUpdate(PREFIX1, new PathId(2L), CLUSTER_ID, 50);
 111     static final Update UPD_200 = createSimpleUpdate(PREFIX1, new PathId(3L), CLUSTER_ID, 200);
 112     static final Update UPD_20 = createSimpleUpdate(PREFIX1, new PathId(1L), CLUSTER_ID, 20);
 113     static final Update UPD_NA_100 = createSimpleUpdate(PREFIX1, null, CLUSTER_ID, 100);
 114     static final Update UPD_NA_100_EBGP = createSimpleUpdateEbgp(PREFIX1);
 115     static final Update UPD_NA_200 = createSimpleUpdate(PREFIX1, null, CLUSTER_ID, 200);
 116     static final Update UPD_NA_200_EBGP = createSimpleUpdateEbgp(PREFIX1);
 117     static final TablesKey TABLES_KEY = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
 118     static final List<BgpTableType> TABLES_TYPE = ImmutableList.of(new BgpTableTypeImpl(TABLES_KEY.getAfi(),
 119         TABLES_KEY.getSafi()));
 120     static final Set<TablesKey> AFI_SAFIS_ADVERTIZED = Collections.singleton(TABLES_KEY);
 121     private BGPExtensionProviderContext context;
 122     static final InstanceIdentifier<BgpRib> BGP_IID = InstanceIdentifier.create(BgpRib.class);
 123     static final int GRACEFUL_RESTART_TIME = 5;
 124     @Mock
 125     protected ClusterSingletonServiceProvider clusterSingletonServiceProvider;
 126     BGPDispatcherImpl serverDispatcher;
 127     RIBExtensionProviderContext ribExtension;
 128     private RIBActivator ribActivator;
 129     private BGPActivator bgpActivator;
 130     private NioEventLoopGroup worker;
 131     private NioEventLoopGroup boss;
 132     private org.opendaylight.protocol.bgp.inet.BGPActivator inetActivator;
 133     protected StrictBGPPeerRegistry serverRegistry;
 134     protected CodecsRegistryImpl codecsRegistry;
 135
 136     @Override
 137     @Before
 138     public void setUp() throws Exception {
 139         super.setUp();
 140         this.ribActivator = new RIBActivator();
 141         this.ribExtension = new SimpleRIBExtensionProviderContext();
 142
 143         this.ribActivator.startRIBExtensionProvider(this.ribExtension, this.mappingService);
 144
 145         this.bgpActivator = new BGPActivator();
 146         this.inetActivator = new org.opendaylight.protocol.bgp.inet.BGPActivator();
 147         this.context = new SimpleBGPExtensionProviderContext();
 148         this.bgpActivator.start(this.context);
 149         this.inetActivator.start(this.context);
 150         if (!Epoll.isAvailable()) {
 151             this.worker = new NioEventLoopGroup();
 152             this.boss = new NioEventLoopGroup();
 153         }
 154         this.serverRegistry = new StrictBGPPeerRegistry();
 155         this.serverDispatcher = new BGPDispatcherImpl(this.context.getMessageRegistry(), this.boss, this.worker,
 156             this.serverRegistry);
 157         doReturn(Mockito.mock(ClusterSingletonServiceRegistration.class)).when(this.clusterSingletonServiceProvider)
 158             .registerClusterSingletonService(any(ClusterSingletonService.class));
 159
 160         this.codecsRegistry = CodecsRegistryImpl.create(this.mappingService.getCodecFactory(),
 161                 this.ribExtension.getClassLoadingStrategy());
 162     }
 163
 164     @Override
 165     @After
 166     public void tearDown() throws ExecutionException, InterruptedException {
 167         this.serverDispatcher.close();
 168         if (!Epoll.isAvailable()) {
 169             this.worker.shutdownGracefully(0, 0, TimeUnit.SECONDS);
 170             this.boss.shutdownGracefully(0, 0, TimeUnit.SECONDS);
 171         }
 172         this.mappingService.close();
 173         this.ribActivator.close();
 174         this.inetActivator.close();
 175         this.bgpActivator.close();
 176     }
 177
 178     void sendRouteAndCheckIsOnLocRib(final BGPSessionImpl session, final Ipv4Prefix prefix, final long localPreference,
 179         final int expectedRoutesOnDS) throws Exception {
 180         waitFutureSuccess(session.writeAndFlush(createSimpleUpdate(prefix, null, null, localPreference)));
 181         checkLocRib(expectedRoutesOnDS);
 182     }
 183
 184     void sendWithdrawalRouteAndCheckIsOnLocRib(final BGPSessionImpl session, final Ipv4Prefix prefix,
 185         final long localPreference, final int expectedRoutesOnDS) throws Exception {
 186         waitFutureSuccess(session.writeAndFlush(createSimpleWithdrawalUpdate(prefix, localPreference)));
 187         checkLocRib(expectedRoutesOnDS);
 188     }
 189
 190     void sendNotification(final BGPSessionImpl session) {
 191         final Notification notMsg = new NotifyBuilder().setErrorCode(BGPError.OPT_PARAM_NOT_SUPPORTED.getCode())
 192             .setErrorSubcode(BGPError.OPT_PARAM_NOT_SUPPORTED.getSubcode()).setData(new byte[] { 4, 9 }).build();
 193         waitFutureSuccess(session.writeAndFlush(notMsg));
 194     }
 195
 196     void causeBGPError(final BGPSessionImpl session) {
 197         final Open openObj = new OpenBuilder().setBgpIdentifier(new Ipv4Address("1.1.1.1"))
 198             .setHoldTimer(50).setMyAsNumber(72).build();
 199         waitFutureSuccess(session.writeAndFlush(openObj));
 200     }
 201
 202     private void checkLocRib(final int expectedRoutesOnDS) throws Exception {
 203         // FIXME: remove this sleep
 204         Thread.sleep(100);
 205         readDataOperational(getDataBroker(), BGP_IID, bgpRib -> {
 206             final Ipv4RoutesCase routes = (Ipv4RoutesCase) bgpRib.getRib().get(0).getLocRib().getTables().get(0)
 207                 .getRoutes();
 208             final int size;
 209             if (routes != null) {
 210                 final Ipv4Routes routesCase = routes.getIpv4Routes();
 211                 if (routesCase != null) {
 212                     final List<Ipv4Route> routeList = routesCase.getIpv4Route();
 213                     size = routeList == null ? 0 : routeList.size();
 214                 } else {
 215                     size = 0;
 216                 }
 217             } else {
 218                 size = 0;
 219             }
 220
 221             Assert.assertEquals(expectedRoutesOnDS, size);
 222             return bgpRib;
 223         });
 224     }
 225
 226     void checkPeersPresentOnDataStore(final int numberOfPeers) throws Exception {
 227         readDataOperational(getDataBroker(), BGP_IID, bgpRib -> {
 228             Assert.assertEquals(numberOfPeers, bgpRib.getRib().get(0).getPeer().size());
 229             return bgpRib;
 230         });
 231     }
 232
 233     BGPSessionImpl createPeerSession(final Ipv4Address peer, final BgpParameters bgpParameters,
 234         final SimpleSessionListener sessionListener) throws InterruptedException {
 235         final StrictBGPPeerRegistry clientRegistry = new StrictBGPPeerRegistry();
 236         final BGPDispatcherImpl clientDispatcher = new BGPDispatcherImpl(this.context.getMessageRegistry(), this.boss,
 237             this.worker, clientRegistry);
 238         clientRegistry.addPeer(new IpAddress(new Ipv4Address(RIB_ID)), sessionListener,
 239             new BGPSessionPreferences(AS_NUMBER, HOLDTIMER, new BgpId(peer),
 240                 AS_NUMBER, Lists.newArrayList(bgpParameters)));
 241
 242         return connectPeer(peer, clientDispatcher);
 243     }
 244
 245     static BGPPeer configurePeer(final BGPTableTypeRegistryConsumer tableRegistry,
 246                                  final Ipv4Address peerAddress, final RIBImpl ribImpl, final BgpParameters bgpParameters,
 247                                  final PeerRole peerRole, final BGPPeerRegistry bgpPeerRegistry) {
 248         return configurePeer(tableRegistry, peerAddress, ribImpl, bgpParameters, peerRole, bgpPeerRegistry,
 249                 AFI_SAFIS_ADVERTIZED, Collections.emptySet());
 250     }
 251
 252     static BGPPeer configurePeer(final BGPTableTypeRegistryConsumer tableRegistry,
 253             final Ipv4Address peerAddress, final RIBImpl ribImpl, final BgpParameters bgpParameters,
 254             final PeerRole peerRole, final BGPPeerRegistry bgpPeerRegistry, final Set<TablesKey> afiSafiAdvertised,
 255             final Set<TablesKey> gracefulAfiSafiAdvertised) {
 256         return configurePeer(tableRegistry, peerAddress, ribImpl, bgpParameters, peerRole, bgpPeerRegistry,
 257                 afiSafiAdvertised, gracefulAfiSafiAdvertised, null);
 258     }
 259
 260     static BGPPeer configurePeer(final BGPTableTypeRegistryConsumer tableRegistry,
 261                                  final Ipv4Address peerAddress, final RIBImpl ribImpl, final BgpParameters bgpParameters,
 262                                  final PeerRole peerRole, final BGPPeerRegistry bgpPeerRegistry,
 263                                  final Set<TablesKey> afiSafiAdvertised, final Set<TablesKey> gracefulAfiSafiAdvertised,
 264                                  final BgpPeer peer) {
 265         final IpAddress ipAddress = new IpAddress(peerAddress);
 266
 267         final BGPPeer bgpPeer = new BGPPeer(tableRegistry, new IpAddress(peerAddress), null, ribImpl, peerRole,
 268                 null, null, null, afiSafiAdvertised, gracefulAfiSafiAdvertised, peer);
 269         final List<BgpParameters> tlvs = Lists.newArrayList(bgpParameters);
 270         bgpPeerRegistry.addPeer(ipAddress, bgpPeer,
 271                 new BGPSessionPreferences(AS_NUMBER, HOLDTIMER, new BgpId(RIB_ID), AS_NUMBER, tlvs));
 272         bgpPeer.instantiateServiceInstance();
 273         return bgpPeer;
 274     }
 275
 276     private static BGPSessionImpl connectPeer(final Ipv4Address localAddress, final BGPDispatcherImpl dispatcherImpl)
 277             throws InterruptedException {
 278         final Future<BGPSessionImpl> future = dispatcherImpl
 279                 .createClient(new InetSocketAddress(localAddress.getValue(), PORT),
 280                         new InetSocketAddress(RIB_ID, PORT), RETRY_TIMER, true);
 281         Thread.sleep(200);
 282         waitFutureSuccess(future);
 283         Thread.sleep(100);
 284         return future.getNow();
 285     }
 286
 287     static BgpParameters createParameter(final boolean addPath) {
 288         return createParameter(addPath, false, null);
 289     }
 290
 291     static BgpParameters createParameter(final boolean addPath,
 292                                          final boolean addIpv6,
 293                                          final Map<TablesKey, Boolean> gracefulTables) {
 294         final TablesKey ipv4Key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
 295         final List<TablesKey> advertisedTables = Lists.newArrayList(ipv4Key);
 296         if (addIpv6) {
 297             final TablesKey ipv6Key = new TablesKey(Ipv6AddressFamily.class, UnicastSubsequentAddressFamily.class);
 298             advertisedTables.add(ipv6Key);
 299         }
 300         final List<TablesKey> addPathTables = Lists.newArrayList();
 301         if (addPath) {
 302             addPathTables.add(ipv4Key);
 303         }
 304         return PeerUtil.createBgpParameters(advertisedTables, addPathTables, gracefulTables, GRACEFUL_RESTART_TIME);
 305     }
 306
 307     private static Update createSimpleUpdate(final Ipv4Prefix prefix, final PathId pathId,
 308             final ClusterIdentifier clusterId, final long localPreference) {
 309         final AttributesBuilder attBuilder = new AttributesBuilder();
 310         attBuilder.setLocalPref(new LocalPrefBuilder().setPref(localPreference).build());
 311         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 312         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.emptyList()).build());
 313         attBuilder.setMultiExitDisc(new MultiExitDiscBuilder().setMed(0L).build());
 314         if (clusterId != null) {
 315             attBuilder.setClusterId(new ClusterIdBuilder().setCluster(Collections.singletonList(clusterId)).build());
 316             attBuilder.setOriginatorId(new OriginatorIdBuilder().setOriginator(new Ipv4Address(clusterId)).build());
 317         }
 318         addAttributeAugmentation(attBuilder, prefix, pathId);
 319         return new UpdateBuilder().setAttributes(attBuilder.build()).build();
 320     }
 321
 322     private static Update createSimpleUpdateEbgp(final Ipv4Prefix prefix) {
 323         final AttributesBuilder attBuilder = new AttributesBuilder();
 324         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 325         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.singletonList(
 326             new SegmentsBuilder().setAsSequence(Collections.singletonList(AS_NUMBER)).build())).build());
 327         addAttributeAugmentation(attBuilder, prefix, null);
 328
 329         return new UpdateBuilder().setAttributes(attBuilder.build()).build();
 330     }
 331
 332     private static void addAttributeAugmentation(final AttributesBuilder attBuilder, final Ipv4Prefix prefix,
 333         final PathId pathId) {
 334         attBuilder.setUnrecognizedAttributes(Collections.emptyList());
 335         attBuilder.addAugmentation(Attributes1.class,
 336             new Attributes1Builder().setMpReachNlri(
 337                 new MpReachNlriBuilder()
 338                     .setCNextHop(new Ipv4NextHopCaseBuilder().setIpv4NextHop(new Ipv4NextHopBuilder().setGlobal(NH1)
 339                         .build()).build())
 340                     .setAfi(Ipv4AddressFamily.class)
 341                     .setSafi(UnicastSubsequentAddressFamily.class)
 342                     .setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(
 343                         new DestinationIpv4CaseBuilder().setDestinationIpv4(
 344                             new DestinationIpv4Builder().setIpv4Prefixes(Collections.singletonList(
 345                                 new Ipv4PrefixesBuilder().setPathId(pathId).setPrefix(new Ipv4Prefix(prefix)).build()))
 346                                 .build())
 347                             .build()).build())
 348                     .build()).build());
 349     }
 350
 351     private static Update createSimpleWithdrawalUpdate(final Ipv4Prefix prefix, final long localPreference) {
 352         final AttributesBuilder attBuilder = new AttributesBuilder();
 353         attBuilder.setLocalPref(new LocalPrefBuilder().setPref(localPreference).build());
 354         attBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
 355         attBuilder.setAsPath(new AsPathBuilder().setSegments(Collections.emptyList()).build());
 356         attBuilder.setUnrecognizedAttributes(Collections.emptyList());
 357         return new UpdateBuilder()
 358                 .setWithdrawnRoutes(Collections.singletonList(new WithdrawnRoutesBuilder().setPrefix(prefix).build()))
 359                 .build();
 360     }
 361 }