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 com.google.common.collect.ImmutableCollection;
  12 import com.google.common.collect.ImmutableSet;
  13 import io.netty.buffer.ByteBuf;
  14 import io.netty.buffer.Unpooled;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.List;
  18 import java.util.Optional;
  19 import java.util.stream.Collectors;
  20 import javax.annotation.Nonnull;
  21 import org.opendaylight.bgp.concepts.RouteDistinguisherUtil;
  22 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  23 import org.opendaylight.protocol.bgp.labeled.unicast.LUNlriParser;
  24 import org.opendaylight.protocol.bgp.labeled.unicast.LabeledUnicastIpv4RIBSupport;
  25 import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupport;
  26 import org.opendaylight.protocol.util.ByteArray;
  27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.destination.DestinationType;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.Route;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.rib.tables.Routes;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.MplsLabeledVpnSubsequentAddressFamily;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.RouteDistinguisher;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.RouteDistinguisherBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev171207.l3vpn.ip.destination.type.VpnDestination;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev171207.l3vpn.ip.destination.type.VpnDestinationBuilder;
  37 import org.opendaylight.yangtools.yang.binding.DataObject;
  38 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  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 public abstract class AbstractVpnRIBSupport extends AbstractRIBSupport {
  54     private static final Logger LOG = LoggerFactory.getLogger(AbstractVpnRIBSupport.class);
  55     private final NodeIdentifier nlriRoutesListNid;
  56     private final NodeIdentifier prefixTypeNid;
  57     private final NodeIdentifier labelStackNid;
  58     private final NodeIdentifier lvNid;
  59     private final NodeIdentifier rdNid;
  60     private final QName routeKey;
  61
  62     /**
  63      * Default constructor. Requires the QName of the container augmented under the routes choice
  64      * node in instantiations of the rib grouping. It is assumed that this container is defined by
  65      * the same model which populates it with route grouping instantiation, and by extension with
  66      * the route attributes container.
  67      *
  68      * @param cazeClass      Binding class of the AFI/SAFI-specific case statement, must not be null
  69      * @param containerClass Binding class of the container in routes choice, must not be null.
  70      * @param listClass      Binding class of the route list, nust not be null;
  71      */
  72     protected AbstractVpnRIBSupport(final Class<? extends Routes> cazeClass,
  73             final Class<? extends DataObject> containerClass, final Class<? extends Route> listClass,
  74         final Class<? extends AddressFamily> afiClass, final QName vpnDstContainerClassQname) {
  75         super(cazeClass, containerClass, listClass, afiClass,
  76                 MplsLabeledVpnSubsequentAddressFamily.class, vpnDstContainerClassQname);
  77         final QName classQname = BindingReflections.findQName(containerClass).intern();
  78         this.routeKey = QName.create(routeQName(), ROUTE_KEY).intern();
  79         final QName vpnDstClassQname = QName.create(classQname, VpnDestination.QNAME.getLocalName());
  80         this.nlriRoutesListNid = NodeIdentifier.create(vpnDstClassQname);
  81         this.prefixTypeNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "prefix").intern());
  82         this.labelStackNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-stack").intern());
  83         this.lvNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-value").intern());
  84         this.rdNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "route-distinguisher").intern());
  85     }
  86
  87     private VpnDestination extractVpnDestination(final DataContainerNode<? extends PathArgument> route) {
  88         final VpnDestination dst = new VpnDestinationBuilder()
  89             .setPrefix(extractPrefix(route, this.prefixTypeNid))
  90             .setLabelStack(LabeledUnicastIpv4RIBSupport.extractLabel(route, this.labelStackNid, this.lvNid))
  91             .setRouteDistinguisher(extractRouteDistinguisher(route))
  92             .build();
  93         return dst;
  94     }
  95
  96     protected abstract IpPrefix extractPrefix(DataContainerNode<? extends PathArgument> route,
  97             NodeIdentifier prefixTypeNid);
  98
  99     private RouteDistinguisher extractRouteDistinguisher(
 100             final DataContainerNode<? extends YangInstanceIdentifier.PathArgument> route) {
 101         if (route.getChild(this.rdNid).isPresent()) {
 102             return RouteDistinguisherBuilder.getDefaultInstance((String) route.getChild(this.rdNid).get().getValue());
 103         }
 104         return null;
 105     }
 106
 107     protected abstract DestinationType getAdvertisedDestinationType(List<VpnDestination> dests);
 108
 109     protected abstract DestinationType getWithdrawnDestinationType(List<VpnDestination> dests);
 110
 111     @Nonnull
 112     @Override
 113     protected DestinationType buildDestination(@Nonnull final Collection<MapEntryNode> routes) {
 114         return getAdvertisedDestinationType(extractRoutes(routes));
 115     }
 116
 117     @Nonnull
 118     @Override
 119     protected DestinationType buildWithdrawnDestination(@Nonnull final Collection<MapEntryNode> routes) {
 120         return getWithdrawnDestinationType(extractRoutes(routes));
 121     }
 122
 123     private List<VpnDestination> extractRoutes(final Collection<MapEntryNode> routes) {
 124         return routes.stream().map(this::extractVpnDestination).collect(Collectors.toList());
 125     }
 126
 127     @Nonnull
 128     @Override
 129     public ImmutableCollection<Class<? extends DataObject>> cacheableAttributeObjects() {
 130         return ImmutableSet.of();
 131     }
 132
 133     @Nonnull
 134     @Override
 135     public ImmutableCollection<Class<? extends DataObject>> cacheableNlriObjects() {
 136         return ImmutableSet.of();
 137     }
 138
 139     @Override
 140     public boolean isComplexRoute() {
 141         return true;
 142     }
 143
 144     @Override
 145     protected void processDestination(final DOMDataWriteTransaction tx, final YangInstanceIdentifier routesPath,
 146         final ContainerNode destination, final ContainerNode attributes, final ApplyRoute function) {
 147         if (destination != null) {
 148             final Optional<DataContainerChild<? extends PathArgument, ?>> maybeRoutes =
 149                     destination.getChild(this.nlriRoutesListNid);
 150             if (maybeRoutes.isPresent()) {
 151                 final DataContainerChild<? extends PathArgument, ?> routes = maybeRoutes.get();
 152                 if (routes instanceof UnkeyedListNode) {
 153                     final UnkeyedListNode routeListNode = (UnkeyedListNode) routes;
 154                     LOG.debug("{} routes are found", routeListNode.getSize());
 155                     final YangInstanceIdentifier base = routesPath.node(routesContainerIdentifier()).node(routeNid());
 156                     for (final UnkeyedListEntryNode e : routeListNode.getValue()) {
 157                         final NodeIdentifierWithPredicates key = createRouteKey(e);
 158                         LOG.debug("Route {} is processed.", key);
 159                         function.apply(tx, base, key, e, attributes);
 160                     }
 161                 } else {
 162                     LOG.warn("Routes {} are not a map", routes);
 163                 }
 164             }
 165         } else {
 166             LOG.debug("Destination is null.");
 167         }
 168     }
 169
 170     private NodeIdentifierWithPredicates createRouteKey(final UnkeyedListEntryNode l3vpn) {
 171         final ByteBuf buffer = Unpooled.buffer();
 172         final VpnDestination dests = new VpnDestinationBuilder().setPrefix(extractPrefix(l3vpn, this.prefixTypeNid))
 173             .setRouteDistinguisher(extractRouteDistinguisher(l3vpn)).build();
 174         final ByteBuf nlriByteBuf = Unpooled.buffer();
 175
 176         for (final VpnDestination dest : Collections.singletonList(dests)) {
 177             final IpPrefix prefix = dest.getPrefix();
 178             LOG.debug("Serializing Nlri: VpnDestination={}, IpPrefix={}", dest, prefix);
 179             AbstractVpnNlriParser.serializeLengtField(prefix, null, nlriByteBuf);
 180             RouteDistinguisherUtil.serializeRouteDistinquisher(dest.getRouteDistinguisher(), nlriByteBuf);
 181             Preconditions.checkArgument(prefix.getIpv6Prefix() != null || prefix.getIpv4Prefix() != null,
 182                     "Ipv6 or Ipv4 prefix is missing.");
 183             LUNlriParser.serializePrefixField(prefix, nlriByteBuf);
 184         }
 185         buffer.writeBytes(nlriByteBuf);
 186
 187         return new NodeIdentifierWithPredicates(routeQName(), this.routeKey, ByteArray.encodeBase64(buffer));
 188     }
 189 }