bgp/extensions/inet/src/main/java/org/opendaylight/protocol/bgp/inet/codec/Ipv4NlriParser.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.Ipv4Util;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4Builder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
  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.DestinationIpv4Case;
  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.DestinationIpv4CaseBuilder;
  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 Ipv4NlriParser implements NlriParser, NlriSerializer {
  39
  40     private static DestinationIpv4 prefixes(final ByteBuf nlri, final PeerSpecificParserConstraint constraints,
  41             final Class<? extends AddressFamily> afi, final Class<? extends SubsequentAddressFamily> safi) {
  42         final List<Ipv4Prefixes> prefixes = new ArrayList<>();
  43         while (nlri.isReadable()) {
  44             final Ipv4PrefixesBuilder prefixesBuilder = new Ipv4PrefixesBuilder();
  45             if (MultiPathSupportUtil.isTableTypeSupported(constraints, new BgpTableTypeImpl(afi, safi))) {
  46                 prefixesBuilder.setPathId(PathIdUtil.readPathId(nlri));
  47             }
  48             prefixesBuilder.setPrefix(Ipv4Util.prefixForByteBuf(nlri));
  49             prefixes.add(prefixesBuilder.build());
  50         }
  51         return new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build();
  52     }
  53
  54     @Override
  55     public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder,
  56             final PeerSpecificParserConstraint constraint) {
  57         builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(
  58                 new DestinationIpv4CaseBuilder().setDestinationIpv4(prefixes(nlri, constraint,
  59                         builder.getAfi(), builder.getSafi())).build()).build());
  60     }
  61
  62     @Override
  63     public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder,
  64             final PeerSpecificParserConstraint constraint) {
  65         builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(
  66                 new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update
  67                         .attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv4CaseBuilder()
  68                         .setDestinationIpv4(prefixes(nlri, constraint, builder.getAfi(), builder.getSafi()))
  69                         .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 DestinationIpv4Case) {
  79                 final DestinationIpv4Case destinationIpv4Case =
  80                         (DestinationIpv4Case) advertizedRoutes.getDestinationType();
  81                 for (final Ipv4Prefixes ipv4Prefix : destinationIpv4Case.getDestinationIpv4().getIpv4Prefixes()) {
  82                     PathIdUtil.writePathId(ipv4Prefix.getPathId(), byteAggregator);
  83                     Ipv4Util.writeMinimalPrefix(ipv4Prefix.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.DestinationIpv4Case) {
  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                         .DestinationIpv4Case destinationIpv4Case = (org.opendaylight.yang.gen.v1.urn.opendaylight
  94                         .params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri.withdrawn.routes
  95                         .destination.type.DestinationIpv4Case) withdrawnRoutes.getDestinationType();
  96                 for (final Ipv4Prefixes ipv4Prefix : destinationIpv4Case.getDestinationIpv4().getIpv4Prefixes()) {
  97                     PathIdUtil.writePathId(ipv4Prefix.getPathId(), byteAggregator);
  98                     Ipv4Util.writeMinimalPrefix(ipv4Prefix.getPrefix(), byteAggregator);
  99                 }
 100             }
 101         }
 102     }
 103 }