bgp/inet/src/main/java/org/opendaylight/protocol/bgp/inet/codec/Ipv6NlriParser.java

   1 /*
   2  * Copyright (c) 2013, 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.inet.codec;
  10
  11 import com.google.common.base.Preconditions;
  12 import io.netty.buffer.ByteBuf;
  13 import java.util.ArrayList;
  14 import java.util.List;
  15 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
  16 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  17 import org.opendaylight.protocol.bgp.parser.spi.MultiPathSupportUtil;
  18 import org.opendaylight.protocol.bgp.parser.spi.NlriParser;
  19 import org.opendaylight.protocol.bgp.parser.spi.NlriSerializer;
  20 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  21 import org.opendaylight.protocol.bgp.parser.spi.PeerSpecificParserConstraint;
  22 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  23 import org.opendaylight.protocol.util.Ipv6Util;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.DestinationIpv6;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.DestinationIpv6Builder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.destination.ipv6.Ipv6Prefixes;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.destination.ipv6.Ipv6PrefixesBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv6Case;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv6CaseBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.path.attributes.Attributes;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes1;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes2;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.MpReachNlriBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.MpUnreachNlriBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.reach.nlri.AdvertizedRoutes;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.unreach.nlri.WithdrawnRoutes;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
  41 import org.opendaylight.yangtools.yang.binding.DataObject;
  42
  43 public final class Ipv6NlriParser implements NlriParser, NlriSerializer {
  44
  45     private static DestinationIpv6 prefixes(final ByteBuf nlri, final PeerSpecificParserConstraint constraint,
  46             final Class<? extends AddressFamily> afi, final Class<? extends SubsequentAddressFamily> safi) {
  47         final List<Ipv6Prefixes> prefixes = new ArrayList<>();
  48         final boolean supported = MultiPathSupportUtil.isTableTypeSupported(constraint,
  49                 new BgpTableTypeImpl(afi, safi));
  50         while (nlri.isReadable()) {
  51             final Ipv6PrefixesBuilder prefixesBuilder = new Ipv6PrefixesBuilder();
  52             if (supported) {
  53                 prefixesBuilder.setPathId(PathIdUtil.readPathId(nlri));
  54             }
  55             prefixesBuilder.setPrefix(Ipv6Util.prefixForByteBuf(nlri));
  56             prefixes.add(prefixesBuilder.build());
  57         }
  58         return new DestinationIpv6Builder().setIpv6Prefixes(prefixes).build();
  59     }
  60
  61     @Override
  62     public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder) throws BGPParsingException {
  63         parseNlri(nlri, builder, null);
  64     }
  65
  66     @Override
  67     public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder) throws BGPParsingException {
  68         parseNlri(nlri, builder, null);
  69     }
  70
  71     @Override
  72     public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder,
  73             final PeerSpecificParserConstraint constraint) {
  74         builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(new DestinationIpv6CaseBuilder()
  75                 .setDestinationIpv6(prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  76     }
  77
  78     @Override
  79     public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder,
  80             final PeerSpecificParserConstraint constraint) {
  81         builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(new org.opendaylight.yang.gen.v1.urn
  82                 .opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri.withdrawn.routes
  83                 .destination.type.DestinationIpv6CaseBuilder().setDestinationIpv6(
  84                 prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  85     }
  86
  87     @Override
  88     public void serializeAttribute(final DataObject attribute, final ByteBuf byteAggregator) {
  89         Preconditions.checkArgument(attribute instanceof Attributes,
  90                 "Attribute parameter is not a PathAttribute object.");
  91         final Attributes pathAttributes = (Attributes) attribute;
  92         final Attributes1 pathAttributes1 = pathAttributes.getAugmentation(Attributes1.class);
  93         final Attributes2 pathAttributes2 = pathAttributes.getAugmentation(Attributes2.class);
  94         if (pathAttributes1 != null) {
  95             final AdvertizedRoutes advertizedRoutes = pathAttributes1.getMpReachNlri().getAdvertizedRoutes();
  96             if (advertizedRoutes != null && advertizedRoutes.getDestinationType() instanceof DestinationIpv6Case) {
  97                 final DestinationIpv6Case destinationIpv6Case =
  98                         (DestinationIpv6Case) advertizedRoutes.getDestinationType();
  99                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
 100                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
 101                     ByteBufWriteUtil.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
 102                 }
 103             }
 104         } else if (pathAttributes2 != null) {
 105             final WithdrawnRoutes withdrawnRoutes = pathAttributes2.getMpUnreachNlri().getWithdrawnRoutes();
 106             if (withdrawnRoutes != null && withdrawnRoutes.getDestinationType() instanceof org.opendaylight.yang.gen
 107                     .v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri
 108                     .withdrawn.routes.destination.type.DestinationIpv6Case) {
 109                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
 110                         .attributes.mp.unreach.nlri.withdrawn.routes.destination.type
 111                         .DestinationIpv6Case destinationIpv6Case =
 112                         (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
 113                                 .attributes.mp.unreach.nlri.withdrawn.routes.destination.type
 114                                 .DestinationIpv6Case) withdrawnRoutes.getDestinationType();
 115                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
 116                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
 117                     ByteBufWriteUtil.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
 118                 }
 119             }
 120         }
 121     }
 122 }