bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/update/ExtendedCommunitiesAttributeParser.java

   1 /*
   2  * Copyright (c) 2013 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.parser.impl.message.update;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.collect.Lists;
  12 import io.netty.buffer.ByteBuf;
  13 import io.netty.buffer.Unpooled;
  14 import java.util.List;
  15 import org.opendaylight.protocol.bgp.parser.AttributeFlags;
  16 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
  17 import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
  18 import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer;
  19 import org.opendaylight.protocol.util.Ipv4Util;
  20 import org.opendaylight.protocol.util.ReferenceCache;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.PathAttributes;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.ExtendedCommunities;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.AsSpecificExtendedCommunityCase;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.Inet4SpecificExtendedCommunityCase;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.OpaqueExtendedCommunityCase;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.RouteOriginExtendedCommunityCase;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.RouteTargetExtendedCommunityCase;
  29 import org.opendaylight.yangtools.yang.binding.DataObject;
  30
  31 public final class ExtendedCommunitiesAttributeParser implements AttributeParser,AttributeSerializer {
  32
  33     public static final int TYPE = 16;
  34
  35     private final ReferenceCache refCache;
  36
  37     public ExtendedCommunitiesAttributeParser(final ReferenceCache refCache) {
  38         this.refCache = Preconditions.checkNotNull(refCache);
  39     }
  40
  41     @Override
  42     public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) throws BGPDocumentedException {
  43         final List<ExtendedCommunities> set = Lists.newArrayList();
  44         while (buffer.isReadable()) {
  45             final ExtendedCommunities comm = CommunitiesParser.parseExtendedCommunity(this.refCache, buffer.slice(buffer.readerIndex(), CommunitiesParser.EXTENDED_COMMUNITY_LENGTH));
  46             buffer.skipBytes(CommunitiesParser.EXTENDED_COMMUNITY_LENGTH);
  47             set.add(comm);
  48         }
  49         builder.setExtendedCommunities(set);
  50     }
  51
  52     @Override
  53     public void serializeAttribute(DataObject attribute, ByteBuf byteAggregator) {
  54         PathAttributes pathAttributes = (PathAttributes) attribute;
  55         List<ExtendedCommunities> communitiesList = pathAttributes.getExtendedCommunities();
  56         if (communitiesList == null) {
  57             return;
  58         }
  59         ByteBuf extendedCommunitiesBuffer = Unpooled.buffer();
  60         for (ExtendedCommunities extendedCommunities : communitiesList) {
  61             if (extendedCommunities.getCommSubType() != null) {
  62                 extendedCommunitiesBuffer.writeShort(extendedCommunities.getCommSubType());
  63             }
  64             if (extendedCommunities.getExtendedCommunity() instanceof AsSpecificExtendedCommunityCase) {
  65                 AsSpecificExtendedCommunityCase asSpecificExtendedCommunity = (AsSpecificExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  66
  67                 //TODO resolve types correctly
  68                 extendedCommunitiesBuffer.writeByte(0);
  69                 extendedCommunitiesBuffer.writeByte(1);
  70
  71                 extendedCommunitiesBuffer.writeShort(asSpecificExtendedCommunity.getAsSpecificExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
  72                 extendedCommunitiesBuffer.writeBytes(asSpecificExtendedCommunity.getAsSpecificExtendedCommunity().getLocalAdministrator());
  73             }
  74             if (extendedCommunities.getExtendedCommunity() instanceof Inet4SpecificExtendedCommunityCase) {
  75                 Inet4SpecificExtendedCommunityCase inet4SpecificExtendedCommunity = (Inet4SpecificExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  76
  77                 //TODO resolve types correctly
  78                 extendedCommunitiesBuffer.writeByte(1);
  79                 extendedCommunitiesBuffer.writeByte(4);
  80
  81                 extendedCommunitiesBuffer.writeBytes(Ipv4Util.bytesForAddress(inet4SpecificExtendedCommunity.getInet4SpecificExtendedCommunity().getGlobalAdministrator()));
  82                 extendedCommunitiesBuffer.writeBytes(inet4SpecificExtendedCommunity.getInet4SpecificExtendedCommunity().getLocalAdministrator());
  83             }
  84             if (extendedCommunities.getExtendedCommunity() instanceof OpaqueExtendedCommunityCase) {
  85                 OpaqueExtendedCommunityCase opaqueExtendedCommunity = (OpaqueExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  86                 //TODO resolve types correctly
  87                 extendedCommunitiesBuffer.writeByte(3);
  88                 extendedCommunitiesBuffer.writeByte(4);
  89
  90                 extendedCommunitiesBuffer.writeBytes(opaqueExtendedCommunity.getOpaqueExtendedCommunity().getValue());
  91             }
  92             if (extendedCommunities.getExtendedCommunity() instanceof RouteTargetExtendedCommunityCase) {
  93                 RouteTargetExtendedCommunityCase routeTargetExtendedCommunity = (RouteTargetExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  94                 //TODO how to determine, which numbering space global administrator number is originated from
  95                 extendedCommunitiesBuffer.writeByte(0);
  96                 extendedCommunitiesBuffer.writeByte(2);
  97
  98                 extendedCommunitiesBuffer.writeShort(routeTargetExtendedCommunity.getRouteTargetExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
  99                 extendedCommunitiesBuffer.writeBytes(routeTargetExtendedCommunity.getRouteTargetExtendedCommunity().getLocalAdministrator());
 100             }
 101             if (extendedCommunities.getExtendedCommunity() instanceof RouteOriginExtendedCommunityCase) {
 102                 RouteOriginExtendedCommunityCase routeOriginExtendedCommunity = (RouteOriginExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
 103                 //TODO how to determine, which numbering space global administrator number is originated from
 104                 extendedCommunitiesBuffer.writeByte(2);
 105                 extendedCommunitiesBuffer.writeByte(3);
 106                 extendedCommunitiesBuffer.writeShort(routeOriginExtendedCommunity.getRouteOriginExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
 107                 extendedCommunitiesBuffer.writeBytes(routeOriginExtendedCommunity.getRouteOriginExtendedCommunity().getLocalAdministrator());
 108             }
 109             byteAggregator.writeByte(AttributeFlags.OPTIONAL);
 110             byteAggregator.writeByte(TYPE);
 111             byteAggregator.writeByte(extendedCommunitiesBuffer.writerIndex());
 112             byteAggregator.writeBytes(extendedCommunitiesBuffer);
 113         }
 114     }
 115 }