vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/intervpnlink/InterVpnLinkUtil.java

   1 /*
   2  * Copyright (c) 2016, 2017 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.vpnmanager.intervpnlink;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import java.math.BigInteger;
  14 import java.util.ArrayList;
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.stream.Collectors;
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  21 import org.opendaylight.genius.mdsalutil.MatchInfo;
  22 import org.opendaylight.genius.mdsalutil.MetaDataUtil;
  23 import org.opendaylight.genius.mdsalutil.NwConstants;
  24 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  25 import org.opendaylight.genius.mdsalutil.matches.MatchMetadata;
  26 import org.opendaylight.genius.utils.ServiceIndex;
  27 import org.opendaylight.netvirt.bgpmanager.api.IBgpManager;
  28 import org.opendaylight.netvirt.fibmanager.api.FibHelper;
  29 import org.opendaylight.netvirt.fibmanager.api.IFibManager;
  30 import org.opendaylight.netvirt.fibmanager.api.RouteOrigin;
  31 import org.opendaylight.netvirt.vpnmanager.VpnConstants;
  32 import org.opendaylight.netvirt.vpnmanager.VpnFootprintService;
  33 import org.opendaylight.netvirt.vpnmanager.VpnUtil;
  34 import org.opendaylight.netvirt.vpnmanager.api.InterfaceUtils;
  35 import org.opendaylight.netvirt.vpnmanager.api.intervpnlink.InterVpnLinkCache;
  36 import org.opendaylight.netvirt.vpnmanager.api.intervpnlink.InterVpnLinkDataComposite;
  37 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.FibEntries;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.fibentries.VrfTables;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.fibentries.VrfTablesKey;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntry;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntryKey;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.InterVpnLinkStates;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.InterVpnLinks;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkState;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkStateBuilder;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkStateKey;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.inter.vpn.link.state.FirstEndpointState;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.inter.vpn.link.state.FirstEndpointStateBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.inter.vpn.link.state.SecondEndpointState;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.inter.vpn.link.state.SecondEndpointStateBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLink;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLinkKey;
  56 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  57 import org.slf4j.Logger;
  58 import org.slf4j.LoggerFactory;
  59
  60 /**
  61  * This class contains methods to be used as utilities related with inter-vpn-link.
  62  */
  63 public final class InterVpnLinkUtil {
  64
  65     private static final Logger LOG = LoggerFactory.getLogger(InterVpnLinkUtil.class);
  66
  67     private InterVpnLinkUtil() { }
  68
  69     /**
  70      * Retrieves the Instance Identifier that points to an InterVpnLink object
  71      * in MD-SAL.
  72      *
  73      * @param interVpnLinkName The name of the InterVpnLink
  74      * @return The requested InstanceIdentifier
  75      */
  76     public static InstanceIdentifier<InterVpnLink> getInterVpnLinkPath(String interVpnLinkName) {
  77         return InstanceIdentifier.builder(InterVpnLinks.class)
  78             .child(InterVpnLink.class, new InterVpnLinkKey(interVpnLinkName))
  79             .build();
  80     }
  81
  82     /**
  83      * Retrieves the Instance Identifier that points to an InterVpnLinkState object
  84      * in MD-SAL.
  85      *
  86      * @param vpnLinkName The name of the InterVpnLink
  87      * @return The requested InstanceIdentifier
  88      */
  89     public static InstanceIdentifier<InterVpnLinkState> getInterVpnLinkStateIid(String vpnLinkName) {
  90         return InstanceIdentifier.builder(InterVpnLinkStates.class)
  91             .child(InterVpnLinkState.class, new InterVpnLinkStateKey(vpnLinkName))
  92             .build();
  93     }
  94
  95     public static String buildInterVpnLinkIfaceName(String vpnName, BigInteger dpnId) {
  96         return String.format("InterVpnLink.%s.%s", vpnName, dpnId.toString());
  97     }
  98
  99     /**
 100      * Updates VpnToDpn map by adding a fake VpnInterface related to an
 101      * InterVpnLink in the corresponding DPNs. If the fake iface is the
 102      * first one on the any of the specified DPNs, the installation of
 103      * Fib flows on that DPN will be triggered.
 104      *
 105      * @param vpnFootprintService VpnFootprintService service reference
 106      * @param vpnName Name of the VPN to which the fake interfaces belong
 107      * @param dpnList List of DPNs where the fake InterVpnLink interface must be added
 108      */
 109     public static void updateVpnFootprint(VpnFootprintService vpnFootprintService, String vpnName,
 110         String primaryRd, List<BigInteger> dpnList) {
 111         LOG.debug("updateVpnFootprint (add):  vpn={}  dpnList={}", vpnName, dpnList);
 112         // Note: when a set of DPNs is calculated for Vpn1, these DPNs are added to the VpnToDpn map of Vpn2. Why?
 113         // because we do the handover from Vpn1 to Vpn2 in those DPNs, so in those DPNs we must know how to reach
 114         // to Vpn2 targets. If new Vpn2 targets are added later, the Fib will be maintained in these DPNs even if
 115         // Vpn2 is not physically present there.
 116         for (BigInteger dpnId : dpnList) {
 117             String ifaceName = buildInterVpnLinkIfaceName(vpnName, dpnId);
 118             vpnFootprintService.updateVpnToDpnMapping(dpnId, vpnName, primaryRd, ifaceName,
 119                     null/*ipAddressSourceValuePair*/, true /* addition */);
 120         }
 121     }
 122
 123     /**
 124      * Updates VpnToDpn map by removing the fake VpnInterface related to an
 125      * InterVpnLink in the corresponding DPNs.
 126      *
 127      * @param vpnFootprintService VpnFootprintService service reference
 128      * @param vpnName Name of the VPN to which the fake interfaces belong
 129      * @param dpnId DPN where the fake InterVpnLink interface must be removed from
 130      */
 131     public static void removeIVpnLinkIfaceFromVpnFootprint(VpnFootprintService vpnFootprintService,
 132         String vpnName, String rd, BigInteger dpnId) {
 133         String ifaceName = buildInterVpnLinkIfaceName(vpnName, dpnId);
 134         LOG.debug("updateVpnFootprint (remove):  vpn={}  dpn={}  ifaceName={}", vpnName, dpnId, ifaceName);
 135         vpnFootprintService.updateVpnToDpnMapping(dpnId, vpnName, rd, ifaceName,
 136                 null/*ipAddressSourceValuePair*/, false /* removal */);
 137     }
 138
 139
 140     public static FirstEndpointState buildFirstEndpointState(FirstEndpointState original,
 141                                                              Optional<List<BigInteger>> new1stEndpointDpns,
 142                                                              Optional<Long> new1stEndpointLportTag) {
 143         FirstEndpointStateBuilder builder = new FirstEndpointStateBuilder(original);
 144         if (new1stEndpointDpns.isPresent()) {
 145             builder.setDpId(new1stEndpointDpns.get());
 146         }
 147         if (new1stEndpointLportTag.isPresent()) {
 148             builder.setLportTag(new1stEndpointLportTag.get());
 149         }
 150         return builder.build();
 151     }
 152
 153     public static FirstEndpointState buildFirstEndpointState(String vpnName, List<BigInteger> dpnList, long lportTag) {
 154         return new FirstEndpointStateBuilder().setVpnUuid(new Uuid(vpnName)).setDpId(dpnList).setLportTag(lportTag)
 155                                               .build();
 156     }
 157
 158     public static SecondEndpointState buildSecondEndpointState(SecondEndpointState original,
 159                                                                Optional<List<BigInteger>> new2ndEndpointDpns,
 160                                                                Optional<Long> new2ndEndpointLportTag) {
 161         SecondEndpointStateBuilder builder = new SecondEndpointStateBuilder(original);
 162         if (new2ndEndpointDpns.isPresent()) {
 163             builder.setDpId(new2ndEndpointDpns.get());
 164         }
 165         if (new2ndEndpointLportTag.isPresent()) {
 166             builder.setLportTag(new2ndEndpointLportTag.get());
 167         }
 168         return builder.build();
 169     }
 170
 171     public static SecondEndpointState buildSecondEndpointState(String vpnName, List<BigInteger> dpnList,
 172                                                                long lportTag) {
 173         return new SecondEndpointStateBuilder().setVpnUuid(new Uuid(vpnName)).setDpId(dpnList).setLportTag(lportTag)
 174                                               .build();
 175     }
 176
 177     /**
 178      * Creates an InterVpnLinkState out of an existing one and modifying only the desired attributes.
 179      *
 180      * @param original InterVpnLinkState to start from.
 181      * @param new1stEndpointState Sets this FirstEndpointState if present
 182      * @param new2ndEndpointState  Sets this SecondEndpointState if present
 183      * @param errDescription  Sets this ErrorDescription if present
 184      * @return the newly build InterVpnLinkState
 185      */
 186     public static InterVpnLinkState buildIvlStateFromOriginal(InterVpnLinkState original,
 187                                                              Optional<FirstEndpointState> new1stEndpointState,
 188                                                              Optional<SecondEndpointState> new2ndEndpointState,
 189                                                              Optional<String> errDescription) {
 190         InterVpnLinkStateBuilder ivlStateBuilder = new InterVpnLinkStateBuilder(original);
 191         if (new1stEndpointState.isPresent()) {
 192             ivlStateBuilder.setFirstEndpointState(new1stEndpointState.get());
 193         }
 194         if (new2ndEndpointState.isPresent()) {
 195             ivlStateBuilder.setSecondEndpointState(new2ndEndpointState.get());
 196         }
 197         if (errDescription.isPresent()) {
 198             ivlStateBuilder.setErrorDescription(errDescription.get());
 199         }
 200         return ivlStateBuilder.build();
 201     }
 202
 203     /**
 204      * Updates inter-VPN link state.
 205      *
 206      * @param broker dataBroker service reference
 207      * @param vpnLinkName The name of the InterVpnLink
 208      * @param state Sets the state of the InterVpnLink to Active or Error
 209      * @param newFirstEndpointState Updates the lportTag and/or DPNs of the 1st endpoint of the InterVpnLink
 210      * @param newSecondEndpointState Updates the lportTag and/or DPNs of the 2nd endpoint of the InterVpnLink
 211      * @param interVpnLinkCache the InterVpnLinkCache
 212      */
 213     public static void updateInterVpnLinkState(DataBroker broker, String vpnLinkName, InterVpnLinkState.State state,
 214             FirstEndpointState newFirstEndpointState, SecondEndpointState newSecondEndpointState,
 215             InterVpnLinkCache interVpnLinkCache) {
 216         Optional<InterVpnLinkState> optOldVpnLinkState = getInterVpnLinkState(broker, vpnLinkName);
 217         if (optOldVpnLinkState.isPresent()) {
 218             InterVpnLinkState newVpnLinkState =
 219                 new InterVpnLinkStateBuilder(optOldVpnLinkState.get()).setState(state)
 220                             .setFirstEndpointState(newFirstEndpointState)
 221                             .setSecondEndpointState(newSecondEndpointState)
 222                             .build();
 223             VpnUtil.syncUpdate(broker, LogicalDatastoreType.CONFIGURATION,
 224                 InterVpnLinkUtil.getInterVpnLinkStateIid(vpnLinkName), newVpnLinkState);
 225             interVpnLinkCache.addInterVpnLinkStateToCaches(newVpnLinkState);
 226         } else {
 227             InterVpnLinkState newIVpnLinkState =
 228                 new InterVpnLinkStateBuilder().setKey(new InterVpnLinkStateKey(vpnLinkName))
 229                     .setInterVpnLinkName(vpnLinkName)
 230                     .setFirstEndpointState(newFirstEndpointState)
 231                     .setSecondEndpointState(newSecondEndpointState)
 232                     .setState(InterVpnLinkState.State.Active)
 233                     .build();
 234             VpnUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 235                 InterVpnLinkUtil.getInterVpnLinkStateIid(vpnLinkName), newIVpnLinkState);
 236             interVpnLinkCache.addInterVpnLinkStateToCaches(newIVpnLinkState);
 237         }
 238     }
 239
 240     /**
 241      * Installs a Flow in LPortDispatcher table that matches on SI=2 and
 242      * the lportTag of one InterVpnLink's endpoint and sets the vrfTag of the
 243      * other endpoint and sends to FIB table.
 244      *
 245      * @param broker dataBroker service reference
 246      * @param mdsalManager MDSAL API accessor
 247      * @param interVpnLinkName Name of the InterVpnLink.
 248      * @param dpnList The list of DPNs where this flow must be installed
 249      * @param vpnUuidOtherEndpoint UUID of the other endpoint of the InterVpnLink
 250      * @param lportTagOfOtherEndpoint Dataplane identifier of the other endpoint of the InterVpnLink
 251      * @return the list of Futures for each and every flow that has been installed
 252      */
 253     public static List<ListenableFuture<Void>> installLPortDispatcherTableFlow(DataBroker broker,
 254                                                                                IMdsalApiManager mdsalManager,
 255                                                                                String interVpnLinkName,
 256                                                                                List<BigInteger> dpnList,
 257                                                                                String vpnUuidOtherEndpoint,
 258                                                                                Long lportTagOfOtherEndpoint) {
 259         List<ListenableFuture<Void>> result = new ArrayList<>();
 260         long vpnId = VpnUtil.getVpnId(broker, vpnUuidOtherEndpoint);
 261         for (BigInteger dpnId : dpnList) {
 262             // insert into LPortDispatcher table
 263             Flow lportDispatcherFlow = buildLPortDispatcherFlow(interVpnLinkName, vpnId,
 264                                                                 lportTagOfOtherEndpoint.intValue());
 265             result.add(mdsalManager.installFlow(dpnId, lportDispatcherFlow));
 266         }
 267
 268         return result;
 269     }
 270
 271     /**
 272      * Builds a Flow to be installed into LPortDispatcher table, that matches on
 273      * SI=2 + vpnLinkEndpointPseudoPortTag and sends to FIB.
 274      *
 275      * @param interVpnLinkName The name of the InterVpnLink
 276      * @param vpnId Dataplane identifier of the VPN, the Vrf Tag.
 277      * @param lportTag DataPlane identifier of the LogicalPort.
 278      * @return the Flow ready to be installed
 279      */
 280     public static Flow buildLPortDispatcherFlow(String interVpnLinkName, long vpnId, int lportTag) {
 281         LOG.info("Inter-vpn-link : buildLPortDispatcherFlow. vpnId {}   lportTag {} ", vpnId, lportTag);
 282         List<MatchInfo> matches = Collections.singletonList(new MatchMetadata(
 283                         MetaDataUtil.getMetaDataForLPortDispatcher(lportTag,
 284                                 ServiceIndex.getIndex(NwConstants.L3VPN_SERVICE_NAME, NwConstants.L3VPN_SERVICE_INDEX)),
 285                         MetaDataUtil.getMetaDataMaskForLPortDispatcher()));
 286         String flowRef = getLportDispatcherFlowRef(interVpnLinkName, lportTag);
 287
 288         return MDSALUtil.buildFlowNew(NwConstants.LPORT_DISPATCHER_TABLE, flowRef,
 289                                       VpnConstants.DEFAULT_LPORT_DISPATCHER_FLOW_PRIORITY, flowRef,
 290                                       0, 0, VpnUtil.getCookieL3((int) vpnId), matches,
 291                                       buildLportDispatcherTableInstructions(vpnId));
 292     }
 293
 294     /**
 295      * Builds a flowRef to be assigned to the flow to be installed into
 296      * LPortDispatcher table.
 297      *
 298      * @param interVpnLinkName The name of the InterVpnLink
 299      * @param lportTag Dataplane identifier of the LogicalPort
 300      * @return the flow reference string
 301      */
 302     public static String getLportDispatcherFlowRef(String interVpnLinkName, Integer lportTag) {
 303         return VpnConstants.FLOWID_PREFIX + "INTERVPNLINK" + NwConstants.FLOWID_SEPARATOR + interVpnLinkName
 304              + NwConstants.FLOWID_SEPARATOR + lportTag
 305              + NwConstants.FLOWID_SEPARATOR + ServiceIndex.getIndex(NwConstants.L3VPN_SERVICE_NAME,
 306                                                                     NwConstants.L3VPN_SERVICE_INDEX)
 307              + NwConstants.FLOWID_SEPARATOR + VpnConstants.DEFAULT_LPORT_DISPATCHER_FLOW_PRIORITY;
 308     }
 309
 310
 311     public static List<Instruction> buildLportDispatcherTableInstructions(long vpnId) {
 312         int instructionKey = 0;
 313         List<Instruction> instructions = new ArrayList<>();
 314         instructions.add(MDSALUtil.buildAndGetWriteMetadaInstruction(MetaDataUtil.getVpnIdMetadata(vpnId),
 315             MetaDataUtil.METADATA_MASK_VRFID,
 316             ++instructionKey));
 317         instructions.add(MDSALUtil.buildAndGetGotoTableInstruction(NwConstants.L3_FIB_TABLE, ++instructionKey));
 318
 319         return instructions;
 320     }
 321
 322     /**
 323      * Retrieves the States of all InterVpnLinks.
 324      *
 325      * @param broker dataBroker service reference
 326      * @return the list of objects that holds the InterVpnLink state information
 327      */
 328     public static List<InterVpnLinkState> getAllInterVpnLinkState(DataBroker broker) {
 329         InstanceIdentifier<InterVpnLinkStates> interVpnLinkStateIid =
 330             InstanceIdentifier.builder(InterVpnLinkStates.class).build();
 331
 332         Optional<InterVpnLinkStates> interVpnLinkStateOpData =
 333             MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, interVpnLinkStateIid);
 334
 335         return interVpnLinkStateOpData.isPresent() ? interVpnLinkStateOpData.get().getInterVpnLinkState()
 336             : new ArrayList<>();
 337     }
 338
 339     /**
 340      * Retrieves the State of an InterVpnLink.
 341      *
 342      * @param broker dataBroker service reference
 343      * @param interVpnLinkName The name of the InterVpnLink
 344      * @return the object that contains the State of the specified InterVpnLink or Optional.absent() if it doesnt exist
 345      */
 346     public static Optional<InterVpnLinkState> getInterVpnLinkState(DataBroker broker, String interVpnLinkName) {
 347         return MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, getInterVpnLinkStateIid(interVpnLinkName));
 348     }
 349
 350     /**
 351      * Retrieves all configured InterVpnLinks.
 352      *
 353      * @param broker dataBroker service reference
 354      * @return the list of InterVpnLinks
 355      */
 356     public static List<InterVpnLink> getAllInterVpnLinks(DataBroker broker) {
 357         InstanceIdentifier<InterVpnLinks> interVpnLinksIid = InstanceIdentifier.builder(InterVpnLinks.class).build();
 358
 359         Optional<InterVpnLinks> interVpnLinksOpData =
 360             MDSALUtil.read(broker, LogicalDatastoreType.CONFIGURATION, interVpnLinksIid);
 361
 362         return interVpnLinksOpData.isPresent() ? interVpnLinksOpData.get().getInterVpnLink()
 363             : new ArrayList<>();
 364     }
 365
 366     /**
 367      * Leaks a route from one VPN to another. By default, the origin for this leaked route is INTERVPN.
 368      *
 369      * @param broker dataBroker service reference
 370      * @param bgpManager Used to advertise routes to the BGP Router
 371      * @param interVpnLink Reference to the object that holds the info about the link between the 2 VPNs
 372      * @param srcVpnUuid UUID of the VPN that has the route that is going to be leaked to the other VPN
 373      * @param dstVpnUuid UUID of the VPN that is going to receive the route
 374      * @param prefix Prefix of the route
 375      * @param label Label of the route in the original VPN
 376      */
 377     // TODO Clean up the exception handling
 378     @SuppressWarnings("checkstyle:IllegalCatch")
 379     public static void leakRoute(DataBroker broker, IBgpManager bgpManager, InterVpnLink interVpnLink,
 380         String srcVpnUuid, String dstVpnUuid, String prefix, Long label) {
 381         Preconditions.checkNotNull(interVpnLink);
 382
 383         // The source VPN must participate in the InterVpnLink
 384         Preconditions.checkArgument(interVpnLink.getFirstEndpoint().getVpnUuid().getValue().equals(srcVpnUuid)
 385                 || interVpnLink.getSecondEndpoint().getVpnUuid().getValue().equals(srcVpnUuid),
 386             "The source VPN {} does not participate in the interVpnLink {}",
 387             srcVpnUuid, interVpnLink.getName());
 388         // The destination VPN must participate in the InterVpnLink
 389         Preconditions.checkArgument(interVpnLink.getFirstEndpoint().getVpnUuid().getValue().equals(dstVpnUuid)
 390                 || interVpnLink.getSecondEndpoint().getVpnUuid().getValue().equals(dstVpnUuid),
 391             "The destination VPN {} does not participate in the interVpnLink {}",
 392             dstVpnUuid, interVpnLink.getName());
 393
 394         boolean destinationIs1stEndpoint = interVpnLink.getFirstEndpoint().getVpnUuid().getValue().equals(dstVpnUuid);
 395
 396         String endpointIp = destinationIs1stEndpoint ? interVpnLink.getSecondEndpoint().getIpAddress().getValue()
 397             : interVpnLink.getFirstEndpoint().getIpAddress().getValue();
 398
 399         VrfEntry newVrfEntry = FibHelper.getVrfEntryBuilder(prefix, label, endpointIp, RouteOrigin.INTERVPN,
 400                 null /* parentVpnRd */).build();
 401
 402         String dstVpnRd = VpnUtil.getVpnRd(broker, dstVpnUuid);
 403         InstanceIdentifier<VrfEntry> newVrfEntryIid =
 404             InstanceIdentifier.builder(FibEntries.class)
 405                 .child(VrfTables.class, new VrfTablesKey(dstVpnRd))
 406                 .child(VrfEntry.class, new VrfEntryKey(newVrfEntry.getDestPrefix()))
 407                 .build();
 408         VpnUtil.asyncWrite(broker, LogicalDatastoreType.CONFIGURATION, newVrfEntryIid, newVrfEntry);
 409
 410         // Finally, route is advertised it to the DC-GW. But while in the FibEntries the nexthop is the other
 411         // endpoint's IP, in the DC-GW the nexthop for those prefixes are the IPs of those DPNs where the target
 412         // VPN has been instantiated
 413         Optional<InterVpnLinkState> optVpnLinkState = getInterVpnLinkState(broker, interVpnLink.getName());
 414         if (optVpnLinkState.isPresent()) {
 415             InterVpnLinkState vpnLinkState = optVpnLinkState.get();
 416             List<BigInteger> dpnIdList = destinationIs1stEndpoint ? vpnLinkState.getFirstEndpointState().getDpId()
 417                 : vpnLinkState.getSecondEndpointState().getDpId();
 418             List<String> nexthops = new ArrayList<>();
 419             for (BigInteger dpnId : dpnIdList) {
 420                 nexthops.add(InterfaceUtils.getEndpointIpAddressForDPN(broker, dpnId));
 421             }
 422             try {
 423                 LOG.debug("Advertising route in VPN={} [prefix={} label={}  nexthops={}] to DC-GW",
 424                     dstVpnRd, newVrfEntry.getDestPrefix(), label.intValue(), nexthops);
 425                 bgpManager.advertisePrefix(dstVpnRd, null /*macAddress*/, newVrfEntry.getDestPrefix(), nexthops,
 426                         VrfEntry.EncapType.Mplsgre, label.intValue(), 0 /*l3vni*/, 0 /*l2vni*/,
 427                         null /*gatewayMacAddress*/);
 428             } catch (Exception ex) {
 429                 LOG.error("Could not advertise prefix {} with label {} to VPN rd={}",
 430                     newVrfEntry.getDestPrefix(), label.intValue(), dstVpnRd, ex);
 431             }
 432         } else {
 433             LOG.warn("Error when advertising leaked routes: Could not find State for InterVpnLink={}",
 434                 interVpnLink.getName());
 435         }
 436     }
 437
 438     public static void handleStaticRoute(InterVpnLinkDataComposite interVpnLink, String vpnName,
 439         String destination, String nexthop, int label,
 440         DataBroker dataBroker, IFibManager fibManager, IBgpManager bgpManager) throws Exception {
 441
 442         LOG.debug("handleStaticRoute [vpnLink={} srcVpn={} destination={} nextHop={} label={}]",
 443             interVpnLink.getInterVpnLinkName(), vpnName, destination, nexthop, label);
 444
 445         String vpnRd = VpnUtil.getVpnRd(dataBroker, vpnName);
 446         if (vpnRd == null) {
 447             LOG.warn("Could not find Route-Distinguisher for VpnName {}", vpnName);
 448             return;
 449         }
 450         LOG.debug("Writing FibEntry to DS:  vpnRd={}, prefix={}, label={}, nexthop={} (interVpnLink)",
 451             vpnRd, destination, label, nexthop);
 452         fibManager.addOrUpdateFibEntry(vpnRd, null /*macAddress*/, destination,
 453                 Collections.singletonList(nexthop), VrfEntry.EncapType.Mplsgre, label,
 454                 0 /*l3vni*/, null /*gatewayMacAddress*/, null /*parentVpnRd*/, RouteOrigin.STATIC, null /*writeTxn*/);
 455
 456         // Now advertise to BGP. The nexthop that must be advertised to BGP are the IPs of the DPN where the
 457         // VPN's endpoint have been instantiated
 458         // List<String> nexthopList = new ArrayList<>(); // The nexthops to be advertised to BGP
 459         List<BigInteger> endpointDpns = interVpnLink.getEndpointDpnsByVpnName(vpnName);
 460         List<String> nexthopList =
 461             endpointDpns.stream().map(dpnId -> InterfaceUtils.getEndpointIpAddressForDPN(dataBroker, dpnId))
 462                         .collect(Collectors.toList());
 463         LOG.debug("advertising IVpnLink route to BGP:  vpnRd={}, prefix={}, label={}, nexthops={}",
 464             vpnRd, destination, label, nexthopList);
 465         bgpManager.advertisePrefix(vpnRd, null /*macAddress*/, destination, nexthopList,
 466                 VrfEntry.EncapType.Mplsgre, label, 0 /*l3vni*/, 0 /*l2vni*/,
 467                 null /*gatewayMacAddress*/);
 468     }
 469 }