bgp/mvpn/src/main/java/org/opendaylight/protocol/bgp/mvpn/impl/nlri/MvpnIpv4NlriHandler.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. 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.mvpn.impl.nlri;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
  13 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  14 import org.opendaylight.protocol.bgp.parser.spi.MultiPathSupportUtil;
  15 import org.opendaylight.protocol.bgp.parser.spi.NlriParser;
  16 import org.opendaylight.protocol.bgp.parser.spi.NlriSerializer;
  17 import org.opendaylight.protocol.bgp.parser.spi.PeerSpecificParserConstraint;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes1;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes2;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlriBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpUnreachNlriBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutes;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.unreach.nlri.WithdrawnRoutes;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv4.rev180417.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationMvpnIpv4AdvertizedCase;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.mvpn.ipv4.rev180417.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationMvpnIpv4WithdrawnCase;
  29
  30 /**
  31  * https://tools.ietf.org/html/rfc6514#section-4.
  32  *
  33  * @author Claudio D. Gasparini
  34  */
  35 public final class MvpnIpv4NlriHandler implements NlriParser, NlriSerializer {
  36     @Override
  37     public void parseNlri(
  38             final ByteBuf nlri,
  39             final MpReachNlriBuilder builder,
  40             final PeerSpecificParserConstraint constraint) throws BGPParsingException {
  41         if (!nlri.isReadable()) {
  42             return;
  43         }
  44         final boolean mPathSupported = MultiPathSupportUtil.isTableTypeSupported(constraint,
  45                 new BgpTableTypeImpl(builder.getAfi(), builder.getSafi()));
  46         builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder()
  47                 .setDestinationType(Ipv4NlriHandler.parseIpv4ReachNlri(nlri, mPathSupported)).build());
  48     }
  49
  50
  51     @Override
  52     public void parseNlri(
  53             final ByteBuf nlri,
  54             final MpUnreachNlriBuilder builder,
  55             final PeerSpecificParserConstraint constraint) throws BGPParsingException {
  56         if (!nlri.isReadable()) {
  57             return;
  58         }
  59         final boolean mPathSupported = MultiPathSupportUtil.isTableTypeSupported(constraint,
  60                 new BgpTableTypeImpl(builder.getAfi(), builder.getSafi()));
  61         builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder()
  62                 .setDestinationType(Ipv4NlriHandler.parseIpv4UnreachNlri(nlri, mPathSupported)).build());
  63     }
  64
  65     @Override
  66     public void serializeAttribute(final Attributes pathAttributes, final ByteBuf byteAggregator) {
  67         final Attributes1 pathAttributes1 = pathAttributes.augmentation(Attributes1.class);
  68         final Attributes2 pathAttributes2 = pathAttributes.augmentation(Attributes2.class);
  69         if (pathAttributes1 != null) {
  70             final AdvertizedRoutes routes = pathAttributes1.getMpReachNlri().getAdvertizedRoutes();
  71             if (routes != null && routes.getDestinationType() instanceof DestinationMvpnIpv4AdvertizedCase) {
  72                 final DestinationMvpnIpv4AdvertizedCase reach
  73                         = (DestinationMvpnIpv4AdvertizedCase) routes.getDestinationType();
  74                 Ipv4NlriHandler.serializeNlri(reach.getDestinationMvpn().getMvpnDestination(),
  75                         byteAggregator);
  76             }
  77         } else if (pathAttributes2 != null) {
  78             final WithdrawnRoutes withdrawnRoutes = pathAttributes2.getMpUnreachNlri().getWithdrawnRoutes();
  79             if (withdrawnRoutes != null
  80                     && withdrawnRoutes.getDestinationType() instanceof DestinationMvpnIpv4WithdrawnCase) {
  81                 final DestinationMvpnIpv4WithdrawnCase reach
  82                         = (DestinationMvpnIpv4WithdrawnCase) withdrawnRoutes.getDestinationType();
  83                 Ipv4NlriHandler.serializeNlri(reach.getDestinationMvpn().getMvpnDestination(),
  84                         byteAggregator);
  85             }
  86         }
  87     }
  88 }