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.protocol.bgp.labeled.unicast.LUNlriParser;
  21 import org.opendaylight.protocol.bgp.labeled.unicast.LabeledUnicastIpv4RIBSupport;
  22 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  23 import org.opendaylight.protocol.bgp.rib.spi.AbstractRIBSupport;
  24 import org.opendaylight.protocol.util.ByteArray;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.PathId;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.destination.DestinationType;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.Route;
  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.types.rev180329.RouteDistinguisher;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.RouteDistinguisherBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.destination.type.VpnDestination;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.destination.type.VpnDestinationBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRoute;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.vpn.rev180329.l3vpn.ip.route.VpnRouteKey;
  40 import org.opendaylight.yangtools.yang.binding.DataObject;
  41 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  42 import org.opendaylight.yangtools.yang.common.QName;
  43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  45 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  46 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  47 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  48 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  49 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
  50 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  51 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
  52 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55
  56 public abstract class AbstractVpnRIBSupport extends AbstractRIBSupport<VpnRoute, VpnRouteKey> {
  57     private static final Logger LOG = LoggerFactory.getLogger(AbstractVpnRIBSupport.class);
  58     private final NodeIdentifier nlriRoutesListNid;
  59     private final NodeIdentifier prefixTypeNid;
  60     private final NodeIdentifier labelStackNid;
  61     private final NodeIdentifier lvNid;
  62     private final NodeIdentifier rdNid;
  63     private final QName routeKey;
  64
  65     /**
  66      * Default constructor. Requires the QName of the container augmented under the routes choice
  67      * node in instantiations of the rib grouping. It is assumed that this container is defined by
  68      * the same model which populates it with route grouping instantiation, and by extension with
  69      * the route attributes container.
  70      *
  71      * @param cazeClass      Binding class of the AFI/SAFI-specific case statement, must not be null
  72      * @param containerClass Binding class of the container in routes choice, must not be null.
  73      * @param listClass      Binding class of the route list, nust not be null;
  74      */
  75     protected AbstractVpnRIBSupport(final Class<? extends Routes> cazeClass,
  76             final Class<? extends DataObject> containerClass, final Class<? extends Route> listClass,
  77         final Class<? extends AddressFamily> afiClass, final QName vpnDstContainerClassQname) {
  78         super(cazeClass, containerClass, listClass, afiClass,
  79                 MplsLabeledVpnSubsequentAddressFamily.class, vpnDstContainerClassQname);
  80         final QName classQname = BindingReflections.findQName(containerClass).intern();
  81         this.routeKey = QName.create(routeQName(), ROUTE_KEY).intern();
  82         final QName vpnDstClassQname = QName.create(classQname, VpnDestination.QNAME.getLocalName());
  83         this.nlriRoutesListNid = NodeIdentifier.create(vpnDstClassQname);
  84         this.prefixTypeNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "prefix").intern());
  85         this.labelStackNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-stack").intern());
  86         this.lvNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "label-value").intern());
  87         this.rdNid = NodeIdentifier.create(QName.create(vpnDstClassQname, "route-distinguisher").intern());
  88     }
  89
  90     private VpnDestination extractVpnDestination(final DataContainerNode<? extends PathArgument> route) {
  91         final VpnDestination dst = new VpnDestinationBuilder()
  92             .setPrefix(extractPrefix(route, this.prefixTypeNid))
  93             .setLabelStack(LabeledUnicastIpv4RIBSupport.extractLabel(route, this.labelStackNid, this.lvNid))
  94             .setRouteDistinguisher(extractRouteDistinguisher(route))
  95             .build();
  96         return dst;
  97     }
  98
  99     protected abstract IpPrefix extractPrefix(DataContainerNode<? extends PathArgument> route,
 100             NodeIdentifier prefixTypeNid);
 101
 102     private RouteDistinguisher extractRouteDistinguisher(
 103             final DataContainerNode<? extends YangInstanceIdentifier.PathArgument> route) {
 104         if (route.getChild(this.rdNid).isPresent()) {
 105             return RouteDistinguisherBuilder.getDefaultInstance((String) route.getChild(this.rdNid).get().getValue());
 106         }
 107         return null;
 108     }
 109
 110     protected abstract DestinationType getAdvertisedDestinationType(List<VpnDestination> dests);
 111
 112     protected abstract DestinationType getWithdrawnDestinationType(List<VpnDestination> dests);
 113
 114     @Override
 115     protected DestinationType buildDestination(final Collection<MapEntryNode> routes) {
 116         return getAdvertisedDestinationType(extractRoutes(routes));
 117     }
 118
 119     @Override
 120     protected DestinationType buildWithdrawnDestination(final Collection<MapEntryNode> routes) {
 121         return getWithdrawnDestinationType(extractRoutes(routes));
 122     }
 123
 124     private List<VpnDestination> extractRoutes(final Collection<MapEntryNode> routes) {
 125         return routes.stream().map(this::extractVpnDestination).collect(Collectors.toList());
 126     }
 127
 128     @Override
 129     protected void processDestination(final DOMDataWriteTransaction tx, final YangInstanceIdentifier routesPath,
 130         final ContainerNode destination, final ContainerNode attributes, final ApplyRoute function) {
 131         if (destination != null) {
 132             final Optional<DataContainerChild<? extends PathArgument, ?>> maybeRoutes =
 133                     destination.getChild(this.nlriRoutesListNid);
 134             if (maybeRoutes.isPresent()) {
 135                 final DataContainerChild<? extends PathArgument, ?> routes = maybeRoutes.get();
 136                 if (routes instanceof UnkeyedListNode) {
 137                     final UnkeyedListNode routeListNode = (UnkeyedListNode) routes;
 138                     LOG.debug("{} routes are found", routeListNode.getSize());
 139                     final YangInstanceIdentifier base = routesPath.node(routesContainerIdentifier()).node(routeNid());
 140                     for (final UnkeyedListEntryNode e : routeListNode.getValue()) {
 141                         final NodeIdentifierWithPredicates key = createRouteKey(e);
 142                         LOG.debug("Route {} is processed.", key);
 143                         function.apply(tx, base, key, e, attributes);
 144                     }
 145                 } else {
 146                     LOG.warn("Routes {} are not a map", routes);
 147                 }
 148             }
 149         } else {
 150             LOG.debug("Destination is null.");
 151         }
 152     }
 153
 154     private NodeIdentifierWithPredicates createRouteKey(final UnkeyedListEntryNode l3vpn) {
 155         final ByteBuf buffer = Unpooled.buffer();
 156         final VpnDestination dests = new VpnDestinationBuilder().setPrefix(extractPrefix(l3vpn, this.prefixTypeNid))
 157             .setRouteDistinguisher(extractRouteDistinguisher(l3vpn)).build();
 158         final ByteBuf nlriByteBuf = Unpooled.buffer();
 159
 160         for (final VpnDestination dest : Collections.singletonList(dests)) {
 161             final IpPrefix prefix = dest.getPrefix();
 162             LOG.debug("Serializing Nlri: VpnDestination={}, IpPrefix={}", dest, prefix);
 163             AbstractVpnNlriParser.serializeLengtField(prefix, null, nlriByteBuf);
 164             RouteDistinguisherUtil.serializeRouteDistinquisher(dest.getRouteDistinguisher(), nlriByteBuf);
 165             Preconditions.checkArgument(prefix.getIpv6Prefix() != null || prefix.getIpv4Prefix() != null,
 166                     "Ipv6 or Ipv4 prefix is missing.");
 167             LUNlriParser.serializePrefixField(prefix, nlriByteBuf);
 168         }
 169         buffer.writeBytes(nlriByteBuf);
 170
 171         final Optional<DataContainerChild<? extends PathArgument, ?>> maybePathIdLeaf =
 172                 l3vpn.getChild(routePathIdNid());
 173         return PathIdUtil.createNidKey(routeQName(), this.routeKey,
 174                 pathIdQName(), ByteArray.encodeBase64(buffer), maybePathIdLeaf);
 175     }
 176
 177     @Override
 178     public final VpnRoute createRoute(final VpnRoute route, final String vpnRouteKey,
 179             final long pathId, final Attributes attributes) {
 180         final VpnRouteBuilder builder;
 181         if (route != null) {
 182             builder = new VpnRouteBuilder(route);
 183         } else {
 184             builder = new VpnRouteBuilder();
 185         }
 186         return builder.setKey(new VpnRouteKey(new PathId(pathId), vpnRouteKey)).setAttributes(attributes).build();
 187     }
 188
 189     @Override
 190     public VpnRouteKey createRouteListKey(final long pathId, final String vpnRouteKey) {
 191         return new VpnRouteKey(new PathId(pathId), vpnRouteKey);
 192     }
 193 }