bgp/l3vpn/src/main/java/org/opendaylight/protocol/bgp/l3vpn/AbstractVpnRIBSupport.java

   1 /*
   2  * Copyright (c) 2016 Brocade Communications 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.l3vpn;
   9
  10 import com.google.common.base.Preconditions;
  11 import io.netty.buffer.ByteBuf;
  12 import io.netty.buffer.Unpooled;
  13 import java.util.Collection;
  14 import java.util.Collections;
  15 import java.util.List;
  16 import java.util.Optional;
  17 import java.util.stream.Collectors;
  18 import org.opendaylight.bgp.concepts.RouteDistinguisherUtil;
  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.labeled.unicast.LUNlriParser;
  22 import org.opendaylight.protocol.bgp.labeled.unicast.LabeledUnicastIpv4RIBSupport;
  23 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  24 import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupport;
  25 import org.opendaylight.protocol.util.ByteArray;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.PathId;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.destination.DestinationType;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.tables.Routes;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.AddressFamily;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.MplsLabeledVpnSubsequentAddressFamily;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.destination.type.VpnDestination;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.destination.type.VpnDestinationBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRoute;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteKey;
  38 import org.opendaylight.yangtools.yang.binding.DataObject;
  39 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  40 import org.opendaylight.yangtools.yang.common.QName;
  41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  42 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  45 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  46 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  47 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
  48 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  49 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
  50 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
  51 import org.slf4j.Logger;
  52 import org.slf4j.LoggerFactory;
  53
  54 public abstract class AbstractVpnRIBSupport<C extends Routes & DataObject, S extends DataObject>
  55         extends AbstractRIBSupport<C, S, VpnRoute, VpnRouteKey> {
  56     private static final Logger LOG = LoggerFactory.getLogger(AbstractVpnRIBSupport.class);
  57     private final NodeIdentifier nlriRoutesListNid;
  58     private final NodeIdentifier labelStackNid;
  59     private final NodeIdentifier lvNid;
  60
  61     /**
  62      * Default constructor. Requires the QName of the container augmented under the routes choice
  63      * node in instantiations of the rib grouping. It is assumed that this container is defined by
  64      * the same model which populates it with route grouping instantiation, and by extension with
  65      * the route attributes container.
  66      *
  67      * @param cazeClass      Binding class of the AFI/SAFI-specific case statement, must not be null
  68      * @param containerClass Binding class of the container in routes choice, must not be null.
  69      */
  70     protected AbstractVpnRIBSupport(
  71             final BindingNormalizedNodeSerializer mappingService,
  72             final Class<C> cazeClass,
  73             final Class<S> containerClass,
  74             final Class<? extends AddressFamily> afiClass,
  75             final QName vpnDstContainerClassQname) {
  76         super(mappingService, cazeClass, containerClass, VpnRoute.class, afiClass,
  77                 MplsLabeledVpnSubsequentAddressFamily.class, vpnDstContainerClassQname);
  78         final QName classQname = BindingReflections.findQName(containerClass).intern();
  79         final QName vpnDstClassQname = QName.create(classQname, VpnDestination.QNAME.getLocalName());
  80         this.nlriRoutesListNid = NodeIdentifier.create(vpnDstClassQname);
  81         this.labelStackNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-stack").intern());
  82         this.lvNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-value").intern());
  83     }
  84
  85     private VpnDestination extractVpnDestination(final DataContainerNode<? extends PathArgument> route) {
  86         return new VpnDestinationBuilder()
  87                 .setPrefix(createPrefix(extractPrefix(route)))
  88                 .setLabelStack(LabeledUnicastIpv4RIBSupport.extractLabel(route, this.labelStackNid, this.lvNid))
  89                 .setRouteDistinguisher(extractRouteDistinguisher(route))
  90                 .setPathId(PathIdUtil.buildPathId(route, routePathIdNid()))
  91                 .build();
  92     }
  93
  94     protected abstract IpPrefix createPrefix(String prefix);
  95
  96     protected abstract DestinationType getAdvertisedDestinationType(List<VpnDestination> dests);
  97
  98     protected abstract DestinationType getWithdrawnDestinationType(List<VpnDestination> dests);
  99
 100     @Override
 101     protected DestinationType buildDestination(final Collection<MapEntryNode> routes) {
 102         return getAdvertisedDestinationType(extractRoutes(routes));
 103     }
 104
 105     @Override
 106     protected DestinationType buildWithdrawnDestination(final Collection<MapEntryNode> routes) {
 107         return getWithdrawnDestinationType(extractRoutes(routes));
 108     }
 109
 110     private List<VpnDestination> extractRoutes(final Collection<MapEntryNode> routes) {
 111         return routes.stream().map(this::extractVpnDestination).collect(Collectors.toList());
 112     }
 113
 114     @Override
 115     protected void processDestination(final DOMDataWriteTransaction tx, final YangInstanceIdentifier routesPath,
 116         final ContainerNode destination, final ContainerNode attributes, final ApplyRoute function) {
 117         if (destination != null) {
 118             final Optional<DataContainerChild<? extends PathArgument, ?>> maybeRoutes =
 119                     destination.getChild(this.nlriRoutesListNid);
 120             if (maybeRoutes.isPresent()) {
 121                 final DataContainerChild<? extends PathArgument, ?> routes = maybeRoutes.get();
 122                 if (routes instanceof UnkeyedListNode) {
 123                     final UnkeyedListNode routeListNode = (UnkeyedListNode) routes;
 124                     LOG.debug("{} routes are found", routeListNode.getSize());
 125                     final YangInstanceIdentifier base = routesPath.node(routesContainerIdentifier()).node(routeNid());
 126                     for (final UnkeyedListEntryNode e : routeListNode.getValue()) {
 127                         final NodeIdentifierWithPredicates key = createRouteKey(e);
 128                         LOG.debug("Route {} is processed.", key);
 129                         function.apply(tx, base, key, e, attributes);
 130                     }
 131                 } else {
 132                     LOG.warn("Routes {} are not a map", routes);
 133                 }
 134             }
 135         } else {
 136             LOG.debug("Destination is null.");
 137         }
 138     }
 139
 140     private NodeIdentifierWithPredicates createRouteKey(final UnkeyedListEntryNode l3vpn) {
 141         final ByteBuf buffer = Unpooled.buffer();
 142         final VpnDestination dests = new VpnDestinationBuilder().setPrefix(createPrefix(extractPrefix(l3vpn)))
 143             .setRouteDistinguisher(extractRouteDistinguisher(l3vpn)).build();
 144         final ByteBuf nlriByteBuf = Unpooled.buffer();
 145
 146         for (final VpnDestination dest : Collections.singletonList(dests)) {
 147             final IpPrefix prefix = dest.getPrefix();
 148             LOG.debug("Serializing Nlri: VpnDestination={}, IpPrefix={}", dest, prefix);
 149             AbstractVpnNlriParser.serializeLengtField(prefix, null, nlriByteBuf);
 150             RouteDistinguisherUtil.serializeRouteDistinquisher(dest.getRouteDistinguisher(), nlriByteBuf);
 151             Preconditions.checkArgument(prefix.getIpv6Prefix() != null || prefix.getIpv4Prefix() != null,
 152                     "Ipv6 or Ipv4 prefix is missing.");
 153             LUNlriParser.serializePrefixField(prefix, nlriByteBuf);
 154         }
 155         buffer.writeBytes(nlriByteBuf);
 156
 157         final Optional<DataContainerChild<? extends PathArgument, ?>> maybePathIdLeaf =
 158                 l3vpn.getChild(routePathIdNid());
 159         return PathIdUtil.createNidKey(routeQName(), routeKeyQName(),
 160                 pathIdQName(), ByteArray.encodeBase64(buffer), maybePathIdLeaf);
 161     }
 162
 163     @Override
 164     public final VpnRoute createRoute(final VpnRoute route, final String vpnRouteKey,
 165             final long pathId, final Attributes attributes) {
 166         final VpnRouteBuilder builder;
 167         if (route != null) {
 168             builder = new VpnRouteBuilder(route);
 169         } else {
 170             builder = new VpnRouteBuilder();
 171         }
 172         return builder.setKey(new VpnRouteKey(new PathId(pathId), vpnRouteKey)).setAttributes(attributes).build();
 173     }
 174
 175     @Override
 176     public VpnRouteKey createRouteListKey(final long pathId, final String vpnRouteKey) {
 177         return new VpnRouteKey(new PathId(pathId), vpnRouteKey);
 178     }
 179 }