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 javax.annotation.Nonnull;
  16 import javax.annotation.Nullable;
  17 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
  18 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  19 import org.opendaylight.protocol.bgp.parser.spi.MultiPathSupportUtil;
  20 import org.opendaylight.protocol.bgp.parser.spi.NlriParser;
  21 import org.opendaylight.protocol.bgp.parser.spi.NlriSerializer;
  22 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  23 import org.opendaylight.protocol.bgp.parser.spi.PeerSpecificParserConstraint;
  24 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  25 import org.opendaylight.protocol.util.Ipv6Util;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv6.prefixes.DestinationIpv6;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv6.prefixes.DestinationIpv6Builder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv6.prefixes.destination.ipv6.Ipv6Prefixes;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv6.prefixes.destination.ipv6.Ipv6PrefixesBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv6Case;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv6CaseBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutes;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutes;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
  43 import org.opendaylight.yangtools.yang.binding.DataObject;
  44
  45 public final class Ipv6NlriParser implements NlriParser, NlriSerializer {
  46
  47     private static DestinationIpv6 prefixes(final ByteBuf nlri, final PeerSpecificParserConstraint constraint,
  48             final Class<? extends AddressFamily> afi, final Class<? extends SubsequentAddressFamily> safi) {
  49         final List<Ipv6Prefixes> prefixes = new ArrayList<>();
  50         final boolean supported = MultiPathSupportUtil.isTableTypeSupported(constraint, new BgpTableTypeImpl(afi, safi));
  51         while (nlri.isReadable()) {
  52             final Ipv6PrefixesBuilder prefixesBuilder = new Ipv6PrefixesBuilder();
  53             if (supported) {
  54                 prefixesBuilder.setPathId(PathIdUtil.readPathId(nlri));
  55             }
  56             prefixesBuilder.setPrefix(Ipv6Util.prefixForByteBuf(nlri));
  57             prefixes.add(prefixesBuilder.build());
  58         }
  59         return new DestinationIpv6Builder().setIpv6Prefixes(prefixes).build();
  60     }
  61
  62     @Override
  63     public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder) throws BGPParsingException {
  64         parseNlri(nlri, builder, null);
  65     }
  66
  67     @Override
  68     public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder) throws BGPParsingException {
  69         parseNlri(nlri, builder, null);
  70     }
  71
  72     @Override
  73     public void parseNlri(@Nonnull final ByteBuf nlri, @Nonnull final MpReachNlriBuilder builder,
  74             @Nullable final PeerSpecificParserConstraint constraint) throws BGPParsingException {
  75         builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(new DestinationIpv6CaseBuilder().
  76                 setDestinationIpv6(prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  77     }
  78
  79     @Override
  80     public void parseNlri(@Nonnull final ByteBuf nlri, @Nonnull final MpUnreachNlriBuilder builder, @Nullable final PeerSpecificParserConstraint constraint) throws BGPParsingException {
  81         builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv6CaseBuilder().setDestinationIpv6(
  82                 prefixes(nlri, constraint, builder.getAfi(), builder.getSafi())).build()).build());
  83     }
  84
  85     @Override
  86     public void serializeAttribute(final DataObject attribute, final ByteBuf byteAggregator) {
  87         Preconditions.checkArgument(attribute instanceof Attributes, "Attribute parameter is not a PathAttribute object.");
  88         final Attributes pathAttributes = (Attributes) attribute;
  89         final Attributes1 pathAttributes1 = pathAttributes.getAugmentation(Attributes1.class);
  90         final Attributes2 pathAttributes2 = pathAttributes.getAugmentation(Attributes2.class);
  91         if (pathAttributes1 != null) {
  92             final AdvertizedRoutes advertizedRoutes = pathAttributes1.getMpReachNlri().getAdvertizedRoutes();
  93             if (advertizedRoutes != null && advertizedRoutes.getDestinationType() instanceof DestinationIpv6Case) {
  94                 final DestinationIpv6Case destinationIpv6Case = (DestinationIpv6Case) advertizedRoutes.getDestinationType();
  95                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
  96                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
  97                     ByteBufWriteUtil.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
  98                 }
  99             }
 100         } else if (pathAttributes2 != null) {
 101             final WithdrawnRoutes withdrawnRoutes = pathAttributes2.getMpUnreachNlri().getWithdrawnRoutes();
 102             if (withdrawnRoutes != null && withdrawnRoutes.getDestinationType() instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv6Case) {
 103                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv6Case destinationIpv6Case =
 104                         (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv6Case) withdrawnRoutes.getDestinationType();
 105                 for (final Ipv6Prefixes ipv6Prefix : destinationIpv6Case.getDestinationIpv6().getIpv6Prefixes()) {
 106                     PathIdUtil.writePathId(ipv6Prefix.getPathId(), byteAggregator);
 107                     ByteBufWriteUtil.writeMinimalPrefix(ipv6Prefix.getPrefix(), byteAggregator);
 108                 }
 109             }
 110         }
 111     }
 112 }