bgp/labeled-unicast/src/main/java/org/opendaylight/protocol/bgp/labeled/unicast/AbstractLabeledUnicastRIBSupport.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.protocol.bgp.labeled.unicast;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import io.netty.buffer.Unpooled;
  13 import java.util.ArrayList;
  14 import java.util.Collection;
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.Optional;
  18 import java.util.stream.Collectors;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  20 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  21 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  22 import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupport;
  23 import org.opendaylight.protocol.util.ByteArray;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.LabeledUnicastSubsequentAddressFamily;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.LabelStack;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.LabelStackBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.destination.CLabeledUnicastDestination;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.destination.CLabeledUnicastDestinationBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.routes.list.LabeledUnicastRoute;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.routes.list.LabeledUnicastRouteBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.labeled.unicast.rev180329.labeled.unicast.routes.list.LabeledUnicastRouteKey;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.PathId;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Routes;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.AddressFamily;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.MplsLabel;
  38 import org.opendaylight.yangtools.yang.binding.DataObject;
  39 import org.opendaylight.yangtools.yang.common.QName;
  40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  42 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  44 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  45 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  46 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
  47 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  48 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
  49 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52
  53 abstract class AbstractLabeledUnicastRIBSupport<
  54         C extends Routes & DataObject,
  55         S extends DataObject>
  56         extends AbstractRIBSupport<C, S, LabeledUnicastRoute, LabeledUnicastRouteKey> {
  57     private static final NodeIdentifier LABEL_STACK_NID
  58             = NodeIdentifier.create(QName.create(CLabeledUnicastDestination.QNAME, "label-stack").intern());
  59     private static final NodeIdentifier LV_NID
  60             = NodeIdentifier.create(QName.create(CLabeledUnicastDestination.QNAME, "label-value").intern());
  61     private static final NodeIdentifier NLRI_ROUTES_LIST = NodeIdentifier.create(CLabeledUnicastDestination.QNAME);
  62     private static final Logger LOG = LoggerFactory.getLogger(AbstractLabeledUnicastRIBSupport.class);
  63
  64     /**
  65      * Default constructor. Requires the QName of the container augmented under the routes choice
  66      * node in instantiations of the rib grouping. It is assumed that this container is defined by
  67      * the same model which populates it with route grouping instantiation, and by extension with
  68      * the route attributes container.
  69      * @param mappingService  Binding Normalized Node Serializer
  70      * @param cazeClass Binding class of the AFI/SAFI-specific case statement, must not be null
  71      * @param containerClass Binding class of the container in routes choice, must not be null.
  72      * @param addressFamilyClass address Family Class
  73      * @param destinationQname destination Qname
  74      */
  75     AbstractLabeledUnicastRIBSupport(
  76             final BindingNormalizedNodeSerializer mappingService,
  77             final Class<C> cazeClass,
  78             final Class<S> containerClass,
  79             final Class<? extends AddressFamily> addressFamilyClass,
  80             final QName destinationQname) {
  81         super(mappingService,
  82                 cazeClass,
  83                 containerClass,
  84                 LabeledUnicastRoute.class,
  85                 addressFamilyClass,
  86                 LabeledUnicastSubsequentAddressFamily.class,
  87                 destinationQname);
  88     }
  89
  90     @Override
  91     protected void processDestination(final DOMDataWriteTransaction tx, final YangInstanceIdentifier routesPath,
  92         final ContainerNode destination, final ContainerNode attributes, final ApplyRoute function) {
  93         if (destination != null) {
  94             final Optional<DataContainerChild<? extends PathArgument, ?>> maybeRoutes
  95                     = destination.getChild(NLRI_ROUTES_LIST);
  96             if (maybeRoutes.isPresent()) {
  97                 final DataContainerChild<? extends PathArgument, ?> routes = maybeRoutes.get();
  98                 if (routes instanceof UnkeyedListNode) {
  99                     final YangInstanceIdentifier base = routesPath.node(routesContainerIdentifier()).node(routeNid());
 100                     for (final UnkeyedListEntryNode e : ((UnkeyedListNode) routes).getValue()) {
 101                         final NodeIdentifierWithPredicates routeKey = createRouteKey(e);
 102                         function.apply(tx, base, routeKey, e, attributes);
 103                     }
 104                 } else {
 105                     LOG.warn("Routes {} are not a map", routes);
 106                 }
 107             }
 108         }
 109     }
 110
 111
 112     protected List<CLabeledUnicastDestination> extractRoutes(final Collection<MapEntryNode> routes) {
 113         return routes.stream().map(this::extractCLabeledUnicastDestination).collect(Collectors.toList());
 114     }
 115
 116     private NodeIdentifierWithPredicates createRouteKey(final UnkeyedListEntryNode labeledUnicast) {
 117         final ByteBuf buffer = Unpooled.buffer();
 118
 119         final CLabeledUnicastDestination dest = extractCLabeledUnicastDestination(labeledUnicast);
 120         LUNlriParser.serializeNlri(Collections.singletonList(dest), false, buffer);
 121         final String routeKeyValue = ByteArray.encodeBase64(buffer);
 122         final Optional<DataContainerChild<? extends PathArgument, ?>> maybePathIdLeaf
 123                 = labeledUnicast.getChild(routePathIdNid());
 124         return PathIdUtil.createNidKey(routeQName(), routeKeyQName(), pathIdQName(), routeKeyValue, maybePathIdLeaf);
 125     }
 126
 127     /**
 128      * Conversion from DataContainer to LabeledUnicastDestination Object
 129      *
 130      * @param route DataContainer
 131      * @return LabeledUnicastDestination Object
 132      */
 133     private CLabeledUnicastDestination extractCLabeledUnicastDestination(
 134             final DataContainerNode<? extends PathArgument> route) {
 135         final CLabeledUnicastDestinationBuilder builder = new CLabeledUnicastDestinationBuilder();
 136         builder.setPrefix(extractPrefix(route, prefixNid()));
 137         builder.setLabelStack(extractLabel(route, LABEL_STACK_NID, LV_NID));
 138         builder.setPathId(PathIdUtil.buildPathId(route, routePathIdNid()));
 139         return builder.build();
 140     }
 141
 142     protected abstract IpPrefix extractPrefix(final DataContainerNode<? extends PathArgument> route,
 143             final NodeIdentifier prefixTypeNid);
 144
 145     public static List<LabelStack> extractLabel(final DataContainerNode<? extends PathArgument> route,
 146             final NodeIdentifier labelStackNid, final NodeIdentifier labelValueNid) {
 147         final List<LabelStack> labels = new ArrayList<>();
 148         final Optional<DataContainerChild<? extends PathArgument, ?>> labelStacks = route.getChild(labelStackNid);
 149         if (labelStacks.isPresent()) {
 150             for (final UnkeyedListEntryNode label : ((UnkeyedListNode) labelStacks.get()).getValue()) {
 151                 final Optional<DataContainerChild<? extends PathArgument, ?>> labelStack
 152                         = label.getChild(labelValueNid);
 153                 if (labelStack.isPresent()) {
 154                     final LabelStackBuilder labelStackbuilder = new LabelStackBuilder();
 155                     labelStackbuilder.setLabelValue(new MplsLabel((Long) labelStack.get().getValue()));
 156                     labels.add(labelStackbuilder.build());
 157                 }
 158             }
 159         }
 160         return labels;
 161     }
 162
 163     @Override
 164     public final LabeledUnicastRouteKey createRouteListKey(final long pathId, final String routeKey) {
 165         return new LabeledUnicastRouteKey(new PathId(pathId), routeKey);
 166     }
 167
 168     @Override
 169     public final LabeledUnicastRoute createRoute(final LabeledUnicastRoute route, final String routeKey,
 170             final long pathId, final Attributes attributes) {
 171         final LabeledUnicastRouteBuilder builder;
 172         if (route != null) {
 173             builder = new LabeledUnicastRouteBuilder(route);
 174         } else {
 175             builder = new LabeledUnicastRouteBuilder();
 176         }
 177         return builder.setKey(new LabeledUnicastRouteKey(new PathId(pathId), routeKey))
 178                 .setAttributes(attributes).build();
 179     }
 180 }