renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/manager/VppNodeManager.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
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.manager;
  10
  11 import static org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus.ConnectionStatus.Connected;
  12 import static org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus.ConnectionStatus.Connecting;
  13 import static org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus.ConnectionStatus.UnableToConnect;
  14
  15 import java.util.ArrayList;
  16 import java.util.Arrays;
  17 import java.util.HashMap;
  18 import java.util.List;
  19 import java.util.Map;
  20 import java.util.Objects;
  21 import java.util.stream.Collectors;
  22
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.Nullable;
  25
  26 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  27 import org.opendaylight.controller.md.sal.binding.api.MountPointService;
  28 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  29 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
  30 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  31 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  32 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  33 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  34 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker;
  35 import org.opendaylight.groupbasedpolicy.renderer.vpp.lisp.info.container.HostRelatedInfoContainer;
  36 import org.opendaylight.groupbasedpolicy.renderer.vpp.lisp.info.container.states.PhysicalInterfaces;
  37 import org.opendaylight.groupbasedpolicy.renderer.vpp.nat.NatUtil;
  38 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.MountedDataBrokerProvider;
  39 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.VppIidFactory;
  40 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.VppRendererProcessingException;
  41 import org.opendaylight.groupbasedpolicy.util.DataStoreHelper;
  42 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.EthernetCsmacd;
  43 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  44 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  45 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
  46 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.Interface1;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.RendererNodes;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.renderer.nodes.RendererNode;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.renderer.nodes.RendererNodeBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.renderer.nodes.RendererNodeKey;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.VppInterfaceAugmentation;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.VppInterfaceAugmentationBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.renderers.renderer.renderer.nodes.renderer.node.PhysicalInterface;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.renderers.renderer.renderer.nodes.renderer.node.PhysicalInterfaceBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.renderers.renderer.renderer.nodes.renderer.node.PhysicalInterfaceKey;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.available.capabilities.AvailableCapability;
  59 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  60 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  61 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  62 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  63 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  64 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  65 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  66 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  67 import org.slf4j.Logger;
  68 import org.slf4j.LoggerFactory;
  69
  70 import com.google.common.base.Optional;
  71 import com.google.common.base.Preconditions;
  72 import com.google.common.base.Splitter;
  73 import com.google.common.base.Strings;
  74 import com.google.common.collect.Lists;
  75 import com.google.common.collect.Sets;
  76 import com.google.common.util.concurrent.CheckedFuture;
  77 import com.google.common.util.concurrent.FutureCallback;
  78 import com.google.common.util.concurrent.Futures;
  79 import com.google.common.util.concurrent.ListenableFuture;
  80
  81 public class VppNodeManager {
  82
  83     private static final TopologyId TOPOLOGY_ID = new TopologyId("topology-netconf");
  84     private static final Logger LOG = LoggerFactory.getLogger(VppNodeManager.class);
  85     private static final String V3PO_CAPABILITY = "(urn:opendaylight:params:xml:ns:yang:v3po?revision=2017-06-07)v3po";
  86     private static final String INTERFACES_CAPABILITY = "(urn:ietf:params:xml:ns:yang:ietf-interfaces?revision=2014-05-08)ietf-interfaces";
  87     private static final NodeId CONTROLLER_CONFIG_NODE = new NodeId("controller-config");
  88     private static final String NO_PUBLIC_INT_SPECIFIED = "unspecified";
  89     private static final String PUBLIC_INTERFACE = "public-interface";
  90     private final Map<NodeId, PhysicalInterfaceKey> extInterfaces = new HashMap<>();
  91     private final DataBroker dataBroker;
  92     private final List<String> requiredCapabilities;
  93     private final MountPointService mountService;
  94     private final HostRelatedInfoContainer hostRelatedInfoContainer = HostRelatedInfoContainer.getInstance();
  95     private final MountedDataBrokerProvider mountProvider;
  96
  97     public VppNodeManager(@Nonnull final DataBroker dataBroker,
  98             @Nonnull final BindingAwareBroker.ProviderContext session, @Nullable String physicalInterfaces) {
  99         this.dataBroker = Preconditions.checkNotNull(dataBroker);
 100         this.mountService = Preconditions.checkNotNull(session.getSALService(MountPointService.class));
 101         this.mountProvider = new MountedDataBrokerProvider(mountService, dataBroker);
 102         requiredCapabilities = initializeRequiredCapabilities();
 103         if (!Strings.isNullOrEmpty(physicalInterfaces) && !Objects.equals(physicalInterfaces, NO_PUBLIC_INT_SPECIFIED)) {
 104             loadPhysicalInterfaces(physicalInterfaces);
 105         }
 106     }
 107
 108     /**
 109      * Caches list of physical interfaces.
 110      */
 111     private void loadPhysicalInterfaces(@Nonnull String physicalInterfaces) {
 112         for (String intfOnNode : Sets.newConcurrentHashSet(Splitter.on(",").split(physicalInterfaces))) {
 113             List<String> entries = Lists.newArrayList(Splitter.on(":").split(intfOnNode));
 114             if (entries.size() != 2) {
 115                 LOG.warn("Cannot resolve {} initial configuration for physical interfaces.", intfOnNode);
 116                 continue;
 117             }
 118             NodeId nodeId = new NodeId(entries.get(0));
 119             PhysicalInterfaceKey infaceKey = new PhysicalInterfaceKey(entries.get(1));
 120             LOG.info("Interface %s on node %swill be considered as external", infaceKey, nodeId);
 121             extInterfaces.put(nodeId, infaceKey);
 122         }
 123     }
 124
 125     /**
 126      * Synchronizes nodes to DataStore based on their modification state which results in
 127      * create/update/remove of Node.
 128      * @param dataAfter data after modification
 129      * @param dataBefore data Before modification
 130      */
 131     public void syncNodes(final Node dataAfter, final Node dataBefore) {
 132         if (isControllerConfigNode(dataAfter, dataBefore)) {
 133             LOG.trace("{} is ignored by VPP-renderer", CONTROLLER_CONFIG_NODE);
 134             return;
 135         }
 136         ListenableFuture<String> syncFuture = Futures.immediateFuture(null);
 137         // New node
 138         if (dataBefore == null && dataAfter != null) {
 139             syncFuture = createNode(dataAfter);
 140         }
 141         // Connected/disconnected node
 142         else if (dataBefore != null && dataAfter != null) {
 143             syncFuture = updateNode(dataAfter);
 144         }
 145         // Removed node
 146         else if (dataBefore != null) {
 147             syncFuture = removeNode(dataBefore);
 148         }
 149         Futures.addCallback(syncFuture, new FutureCallback<String>() {
 150             @Override
 151             public void onSuccess(@Nullable String message) {
 152                 LOG.info("Node synchronization completed. {} ", message);
 153             }
 154
 155             @Override
 156             public void onFailure(@Nonnull Throwable t) {
 157                 LOG.warn("Node synchronization failed. Data before: {} after {}", dataBefore, dataAfter);
 158             }
 159         });
 160     }
 161
 162     private boolean isControllerConfigNode(final Node dataAfter, final Node dataBefore) {
 163         if (dataAfter != null) {
 164             return CONTROLLER_CONFIG_NODE.equals(dataAfter.getNodeId());
 165         }
 166         return CONTROLLER_CONFIG_NODE.equals(dataBefore.getNodeId());
 167     }
 168
 169     private ListenableFuture<String> createNode(final Node node) {
 170         final String nodeId = node.getNodeId().getValue();
 171         LOG.info("Registering new node {}", nodeId);
 172         final NetconfNode netconfNode = getNodeAugmentation(node);
 173         if (netconfNode == null) {
 174             final String message = String.format("Node %s is not an netconf node", nodeId);
 175             return Futures.immediateFuture(message);
 176         }
 177         final NetconfNodeConnectionStatus.ConnectionStatus connectionStatus = netconfNode.getConnectionStatus();
 178         switch (connectionStatus) {
 179             case Connecting: {
 180                 final String message = String.format("Connecting device %s ...", nodeId);
 181                 return Futures.immediateFuture(message);
 182             }
 183             case Connected: {
 184                 return resolveConnectedNode(node, netconfNode);
 185             }
 186             case UnableToConnect: {
 187                 final String message = String.format("Connection status is unable to connect for node %s", nodeId);
 188                 return Futures.immediateFuture(message);
 189             }
 190             default: {
 191                 final String message = String.format("Unknown connection status for node %s", nodeId);
 192                 return Futures.immediateFailedFuture(new VppRendererProcessingException(message));
 193             }
 194         }
 195     }
 196
 197     private ListenableFuture<String> updateNode(final Node node) {
 198         final String nodeId = node.getNodeId().getValue();
 199         LOG.info("Updating node {}", nodeId);
 200         final NetconfNode netconfNode = getNodeAugmentation(node);
 201         if (netconfNode == null) {
 202             final String message = String.format("Node %s is not an netconf node", nodeId);
 203             return Futures.immediateFuture(message);
 204         }
 205         final NetconfNodeConnectionStatus.ConnectionStatus afterNodeStatus = netconfNode.getConnectionStatus();
 206         if (Connected.equals(afterNodeStatus)) {
 207             return resolveConnectedNode(node, netconfNode);
 208         } else if (Connecting.equals(afterNodeStatus)) {
 209             final String cause = String.format("Node %s is disconnected, removing from available nodes", nodeId);
 210             return resolveDisconnectedNode(node, cause);
 211         } else if (UnableToConnect.equals(afterNodeStatus)) {
 212             final String cause = String.format("New node %s status is unable to connect, removing from available nodes",
 213                     nodeId);
 214             return resolveDisconnectedNode(node, cause);
 215         } else {
 216             final String cause = String.format("New node status is unknown. Node %s will be removed from available nodes",
 217                     nodeId);
 218             return resolveDisconnectedNode(node, cause);
 219         }
 220     }
 221
 222     private ListenableFuture<String> removeNode(final Node node) {
 223         final String cause = String.format("Node %s is removed", node.getNodeId().getValue());
 224         return resolveDisconnectedNode(node, cause);
 225     }
 226
 227     private ListenableFuture<String> resolveConnectedNode(final Node node, final NetconfNode netconfNode) {
 228         final String nodeId = node.getNodeId().getValue();
 229         final InstanceIdentifier<Node> mountPointIid = getMountpointIid(node);
 230         final RendererNode rendererNode = remapNode(mountPointIid);
 231         if (!isCapableNetconfDevice(node, netconfNode)) {
 232             final String message = String.format("Node %s is not connected", nodeId);
 233             return Futures.immediateFuture(message);
 234         }
 235         final Optional<DataBroker> mountpoint = mountProvider.resolveDataBrokerForMountPoint(mountPointIid);
 236         if (mountpoint.isPresent()) {
 237             final String message = String.format("Mountpoint not available for node %s", nodeId);
 238             return Futures.immediateFuture(message);
 239         }
 240         final WriteTransaction wTx = dataBroker.newWriteOnlyTransaction();
 241         wTx.put(LogicalDatastoreType.OPERATIONAL, VppIidFactory.getRendererNodeIid(rendererNode), rendererNode, true);
 242         final boolean submit = DataStoreHelper.submitToDs(wTx);
 243         if (submit) {
 244             final String message = String.format("Node %s is capable and ready", nodeId);
 245             syncPhysicalInterfacesInLocalDs(mountpoint.get(), mountPointIid);
 246             NatUtil.resolveOutboundNatInterface(mountPointIid, node.getNodeId(), extInterfaces);
 247             return Futures.immediateFuture(message);
 248         } else {
 249             final String message = String.format("Failed to resolve connected node %s", nodeId);
 250             return Futures.immediateFuture(message);
 251         }
 252     }
 253
 254     private ListenableFuture<String> resolveDisconnectedNode(final Node node, final String cause) {
 255         final InstanceIdentifier<Node> mountPointIid = getMountpointIid(node);
 256         final RendererNode rendererNode = remapNode(mountPointIid);
 257         final WriteTransaction wTx = dataBroker.newWriteOnlyTransaction();
 258         wTx.delete(LogicalDatastoreType.OPERATIONAL, VppIidFactory.getRendererNodeIid(rendererNode));
 259         final CheckedFuture<Void, TransactionCommitFailedException> checkedFuture = wTx.submit();
 260         try {
 261             checkedFuture.checkedGet();
 262             return Futures.immediateFuture(cause);
 263         } catch (TransactionCommitFailedException e) {
 264             final String message = String.format("Failed to resolve disconnected node %s", node.getNodeId().getValue());
 265             return Futures.immediateFailedFuture(new VppRendererProcessingException(message));
 266         }
 267     }
 268
 269     private RendererNode remapNode(final InstanceIdentifier<Node> path) {
 270         final RendererNodeBuilder rendererNodeBuilder = new RendererNodeBuilder();
 271         rendererNodeBuilder.setKey(new RendererNodeKey(path)).setNodePath(path);
 272         return rendererNodeBuilder.build();
 273     }
 274
 275     private InstanceIdentifier<Node> getMountpointIid(final Node node) {
 276         return InstanceIdentifier.builder(NetworkTopology.class)
 277                 .child(Topology.class, new TopologyKey(TOPOLOGY_ID))
 278                 .child(Node.class, new NodeKey(node.getNodeId()))
 279                 .build();
 280     }
 281
 282     private boolean isCapableNetconfDevice(final Node node, final NetconfNode netconfAugmentation) {
 283         if (netconfAugmentation.getAvailableCapabilities() == null
 284                 || netconfAugmentation.getAvailableCapabilities().getAvailableCapability() == null
 285                 || netconfAugmentation.getAvailableCapabilities().getAvailableCapability().isEmpty()) {
 286             LOG.warn("Node {} does not contain any capabilities", node.getNodeId().getValue());
 287             return false;
 288         }
 289         if (!capabilityCheck(netconfAugmentation.getAvailableCapabilities().getAvailableCapability())) {
 290             LOG.warn("Node {} does not contain all capabilities required by vpp-renderer", node.getNodeId().getValue());
 291             return false;
 292         }
 293         return true;
 294     }
 295
 296     private boolean capabilityCheck(final List<AvailableCapability> capabilities) {
 297         final List<String> availableCapabilities = capabilities.stream()
 298                 .map(AvailableCapability::getCapability)
 299                 .collect(Collectors.toList());
 300         return requiredCapabilities.stream()
 301                 .allMatch(availableCapabilities::contains);
 302     }
 303
 304     private NetconfNode getNodeAugmentation(final Node node) {
 305         final NetconfNode netconfNode = node.getAugmentation(NetconfNode.class);
 306         if (netconfNode == null) {
 307             LOG.warn("Node {} is not a netconf device", node.getNodeId().getValue());
 308             return null;
 309         }
 310         return netconfNode;
 311     }
 312
 313     /**
 314      * Initialize all common capabilities required by VPP renderer. Any connected node is examined
 315      * whether it's
 316      * an appropriate device to handle configuration created by this renderer. A device must support
 317      * all capabilities
 318      * in list below.
 319      *
 320      * @return list of string representations of required capabilities
 321      */
 322     private List<String> initializeRequiredCapabilities() {
 323         // Required device capabilities
 324         String[] capabilityEntries = {V3PO_CAPABILITY, INTERFACES_CAPABILITY};
 325         return Arrays.asList(capabilityEntries);
 326     }
 327
 328     private void syncPhysicalInterfacesInLocalDs(DataBroker mountPointDataBroker, InstanceIdentifier<Node> nodeIid) {
 329         ReadWriteTransaction rwTx = dataBroker.newReadWriteTransaction();
 330         ReadOnlyTransaction rTx = mountPointDataBroker.newReadOnlyTransaction();
 331         Optional<Interfaces> readIfaces = DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION,
 332                 InstanceIdentifier.create(Interfaces.class), rTx);
 333         if (readIfaces.isPresent()) {
 334             InstanceIdentifier<RendererNode> rendererNodeIid = VppIidFactory.getRendererNodesIid()
 335                 .builder()
 336                 .child(RendererNode.class, new RendererNodeKey(nodeIid))
 337                 .build();
 338             Optional<RendererNode> optRendNode = DataStoreHelper.readFromDs(LogicalDatastoreType.OPERATIONAL,
 339                     rendererNodeIid, rwTx);
 340             NodeId nodeId = nodeIid.firstKeyOf(Node.class).getNodeId();
 341             RendererNode rendNode = new RendererNodeBuilder(optRendNode.get())
 342                 .addAugmentation(VppInterfaceAugmentation.class, resolveTerminationPoints(nodeId, readIfaces.get()))
 343                 .build();
 344             rwTx.put(LogicalDatastoreType.OPERATIONAL, VppIidFactory.getRendererNodeIid(optRendNode.get()), rendNode,
 345                     true);
 346         }
 347         rTx.close();
 348         DataStoreHelper.submitToDs(rwTx);
 349     }
 350
 351     private VppInterfaceAugmentation resolveTerminationPoints(NodeId nodeId, Interfaces interfaces) {
 352         List<PhysicalInterface> phIfaces = new ArrayList<>();
 353         if (interfaces != null && interfaces.getInterface() != null) {
 354             interfaces.getInterface()
 355                 .stream()
 356                 .filter(iface -> iface.getType().equals(EthernetCsmacd.class))
 357                 .filter(iface -> iface.getAugmentation(Interface1.class) != null)
 358                 .forEach(iface -> {
 359                     PhysicalInterfaceBuilder phIface = new PhysicalInterfaceBuilder();
 360                     phIface.setInterfaceName(iface.getName());
 361                     phIface.setType(iface.getType());
 362                     phIface.setAddress(resolveIpAddress(iface.getAugmentation(Interface1.class)));
 363                     PhysicalInterfaces physicalInterfaces = hostRelatedInfoContainer
 364                                                                         .getPhysicalInterfaceState(nodeId.getValue());
 365                     if (physicalInterfaces == null) {
 366                         physicalInterfaces = new PhysicalInterfaces();
 367                         hostRelatedInfoContainer.setPhysicalInterfaceStateOfHost(nodeId.getValue(), physicalInterfaces);
 368                     }
 369
 370
 371                     if (extInterfaces.get(nodeId) != null
 372                             && extInterfaces.get(nodeId).getInterfaceName().equals(phIface.getInterfaceName())) {
 373                         phIface.setExternal(true);
 374                         extInterfaces.put(nodeId, new PhysicalInterfaceKey(iface.getName()));
 375                         physicalInterfaces
 376                                 .addPhysicalInterfaceInfo(PhysicalInterfaces.PhysicalInterfaceType.PUBLIC,
 377                                         phIface.getInterfaceName(), phIface.getAddress().get(0));
 378                         LOG.info("Interface {} is marked as public interface based on bundle configuration.",
 379                                 iface.getName());
 380                     }
 381                     if (PUBLIC_INTERFACE.equals(iface.getDescription())) {
 382                         phIface.setExternal(true);
 383                         extInterfaces.put(nodeId, new PhysicalInterfaceKey(iface.getName()));
 384                         physicalInterfaces
 385                                 .addPhysicalInterfaceInfo(PhysicalInterfaces.PhysicalInterfaceType.PUBLIC,
 386                                         phIface.getInterfaceName(), phIface.getAddress().get(0));
 387                         LOG.info("Interface {} is marked as public interface based on HC configuration.",
 388                                 iface.getName());
 389                     }
 390                     phIfaces.add(phIface.build());
 391                 });
 392         }
 393         return new VppInterfaceAugmentationBuilder().setPhysicalInterface(phIfaces).build();
 394     }
 395
 396     private List<IpAddress> resolveIpAddress(Interface1 iface) {
 397         if (iface.getIpv4() != null && iface.getIpv4().getAddress() != null) {
 398             return iface.getIpv4().getAddress().stream().map(ipv4 ->
 399                     new IpAddress(new Ipv4Address(ipv4.getIp().getValue()))).collect(Collectors.toList());
 400         } else if (iface.getIpv6() != null && iface.getIpv6().getAddress() != null) {
 401             return iface.getIpv6().getAddress().stream().map(ipv6 ->
 402                     new IpAddress(new Ipv4Address(ipv6.getIp().getValue()))).collect(Collectors.toList());
 403         }
 404         return Lists.newArrayList();
 405     }
 406
 407     public static Map<NodeId, String> resolvePublicInterfaces(ReadTransaction rTx) {
 408         Map<NodeId, String> nodes = new HashMap<>();
 409         Optional<RendererNodes> rendNodes =
 410                 DataStoreHelper.readFromDs(LogicalDatastoreType.OPERATIONAL, VppIidFactory.getRendererNodesIid(), rTx);
 411         if (!rendNodes.isPresent()) {
 412             return nodes;
 413         }
 414         rendNodes.get()
 415             .getRendererNode()
 416             .stream()
 417             .filter(rn -> rn.getAugmentation(VppInterfaceAugmentation.class) != null)
 418             .filter(rn -> rn.getAugmentation(VppInterfaceAugmentation.class).getPhysicalInterface() != null)
 419             .forEach(rn -> {
 420                 java.util.Optional<PhysicalInterface> pubInt = rn.getAugmentation(VppInterfaceAugmentation.class)
 421                     .getPhysicalInterface()
 422                     .stream()
 423                     .filter(phInt -> phInt.isExternal())
 424                     .findFirst();
 425                 if (pubInt.isPresent()) {
 426                     nodes.put(rn.getNodePath().firstKeyOf(Node.class).getNodeId(), pubInt.get().getInterfaceName());
 427                 }
 428             });
 429         return nodes;
 430     }
 431 }