bgp/extensions/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 package org.opendaylight.protocol.bgp.inet.codec;
   9
  10 import io.netty.buffer.ByteBuf;
  11 import java.util.ArrayList;
  12 import java.util.List;
  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.PathIdUtil;
  18 import org.opendaylight.protocol.bgp.parser.spi.PeerSpecificParserConstraint;
  19 import org.opendaylight.protocol.util.Ipv6Util;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.DestinationIpv6;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.DestinationIpv6Builder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.destination.ipv6.Ipv6Prefixes;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv6.prefixes.destination.ipv6.Ipv6PrefixesBuilder;
  24 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;
  25 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;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes1;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.Attributes2;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlriBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpUnreachNlriBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutes;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.unreach.nlri.WithdrawnRoutes;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.AddressFamily;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.SubsequentAddressFamily;
  37
  38 public final class Ipv6NlriParser implements NlriParser, NlriSerializer {
  39
  40     private static DestinationIpv6 prefixes(final ByteBuf nlri, final PeerSpecificParserConstraint constraint,
  41             final Class<? extends AddressFamily> afi, final Class<? extends SubsequentAddressFamily> safi) {
  42         final List<Ipv6Prefixes> prefixes = new ArrayList<>();
  43         final boolean supported = MultiPathSupportUtil.isTableTypeSupported(constraint,
  44                 new BgpTableTypeImpl(afi, safi));
  45         while (nlri.isReadable()) {
  46             final Ipv6PrefixesBuilder prefixesBuilder = new Ipv6PrefixesBuilder();
  47             if (supported) {
  48                 prefixesBuilder.setPathId(PathIdUtil.readPathId(nlri));
  49             }
  50             prefixesBuilder.setPrefix(Ipv6Util.prefixForByteBuf(nlri));
  51             prefixes.add(prefixesBuilder.build());
  52         }
  53         return new DestinationIpv6Builder().setIpv6Prefixes(prefixes).build();
  54     }
  55
  56     @Override
  57     public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder,
  58             final PeerSpecificParserConstraint constraint) {
  59         builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(new DestinationIpv6CaseBuilder()
  60                 .setDestinationIpv6(prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  61     }
  62
  63     @Override
  64     public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder,
  65             final PeerSpecificParserConstraint constraint) {
  66         builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(new org.opendaylight.yang.gen.v1.urn
  67                 .opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri.withdrawn.routes
  68                 .destination.type.DestinationIpv6CaseBuilder().setDestinationIpv6(
  69                 prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  70     }
  71
  72     @Override
  73     public void serializeAttribute(final Attributes pathAttributes, final ByteBuf byteAggregator) {
  74         final Attributes1 pathAttributes1 = pathAttributes.augmentation(Attributes1.class);
  75         final Attributes2 pathAttributes2 = pathAttributes.augmentation(Attributes2.class);
  76         if (pathAttributes1 != null) {
  77             final AdvertizedRoutes advertizedRoutes = pathAttributes1.getMpReachNlri().getAdvertizedRoutes();
  78             if (advertizedRoutes != null && advertizedRoutes.getDestinationType() instanceof DestinationIpv6Case) {
  79                 final DestinationIpv6Case destinationIpv6Case =
  80                         (DestinationIpv6Case) advertizedRoutes.getDestinationType();
  81                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
  82                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
  83                     Ipv6Util.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
  84                 }
  85             }
  86         } else if (pathAttributes2 != null) {
  87             final WithdrawnRoutes withdrawnRoutes = pathAttributes2.getMpUnreachNlri().getWithdrawnRoutes();
  88             if (withdrawnRoutes != null && withdrawnRoutes.getDestinationType() instanceof org.opendaylight.yang.gen
  89                     .v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri
  90                     .withdrawn.routes.destination.type.DestinationIpv6Case) {
  91                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
  92                         .attributes.mp.unreach.nlri.withdrawn.routes.destination.type
  93                         .DestinationIpv6Case destinationIpv6Case =
  94                         (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
  95                                 .attributes.mp.unreach.nlri.withdrawn.routes.destination.type
  96                                 .DestinationIpv6Case) withdrawnRoutes.getDestinationType();
  97                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
  98                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
  99                     Ipv6Util.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
 100                 }
 101             }
 102         }
 103     }
 104 }