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
  13 import io.netty.buffer.ByteBuf;
  14
  15 import io.netty.buffer.Unpooled;
  16 import java.util.List;
  17
  18 import org.opendaylight.protocol.bgp.parser.AttributeFlags;
  19 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
  20 import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
  21 import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer;
  22 import org.opendaylight.protocol.concepts.Ipv4Util;
  23 import org.opendaylight.protocol.util.ReferenceCache;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.PathAttributes;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.ExtendedCommunities;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.AsSpecificExtendedCommunityCase;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.Inet4SpecificExtendedCommunityCase;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.OpaqueExtendedCommunityCase;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.RouteOriginExtendedCommunityCase;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.extended.community.extended.community.RouteTargetExtendedCommunityCase;
  32 import org.opendaylight.yangtools.yang.binding.DataObject;
  33
  34 public final class ExtendedCommunitiesAttributeParser implements AttributeParser,AttributeSerializer {
  35
  36     public static final int TYPE = 16;
  37
  38     private final ReferenceCache refCache;
  39
  40     public ExtendedCommunitiesAttributeParser(final ReferenceCache refCache) {
  41         this.refCache = Preconditions.checkNotNull(refCache);
  42     }
  43
  44     @Override
  45     public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) throws BGPDocumentedException {
  46         final List<ExtendedCommunities> set = Lists.newArrayList();
  47         while (buffer.isReadable()) {
  48             final ExtendedCommunities comm = CommunitiesParser.parseExtendedCommunity(this.refCache, buffer.slice(buffer.readerIndex(), CommunitiesParser.EXTENDED_COMMUNITY_LENGTH));
  49             buffer.skipBytes(CommunitiesParser.EXTENDED_COMMUNITY_LENGTH);
  50             set.add(comm);
  51         }
  52         builder.setExtendedCommunities(set);
  53     }
  54
  55     @Override
  56     public void serializeAttribute(DataObject attribute, ByteBuf byteAggregator) {
  57         PathAttributes pathAttributes = (PathAttributes) attribute;
  58         List<ExtendedCommunities> communitiesList = pathAttributes.getExtendedCommunities();
  59         if (communitiesList == null) {
  60             return;
  61         }
  62         ByteBuf extendedCommunitiesBuffer = Unpooled.buffer();
  63         for (ExtendedCommunities extendedCommunities : communitiesList) {
  64             if (extendedCommunities.getCommSubType() != null) {
  65                 extendedCommunitiesBuffer.writeShort(extendedCommunities.getCommSubType());
  66             }
  67             if (extendedCommunities.getExtendedCommunity() instanceof AsSpecificExtendedCommunityCase) {
  68                 AsSpecificExtendedCommunityCase asSpecificExtendedCommunity = (AsSpecificExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  69
  70                 //TODO resolve types correctly
  71                 extendedCommunitiesBuffer.writeByte(0);
  72                 extendedCommunitiesBuffer.writeByte(1);
  73
  74                 extendedCommunitiesBuffer.writeShort(asSpecificExtendedCommunity.getAsSpecificExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
  75                 extendedCommunitiesBuffer.writeBytes(asSpecificExtendedCommunity.getAsSpecificExtendedCommunity().getLocalAdministrator());
  76             }
  77             if (extendedCommunities.getExtendedCommunity() instanceof Inet4SpecificExtendedCommunityCase) {
  78                 Inet4SpecificExtendedCommunityCase inet4SpecificExtendedCommunity = (Inet4SpecificExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  79
  80                 //TODO resolve types correctly
  81                 extendedCommunitiesBuffer.writeByte(1);
  82                 extendedCommunitiesBuffer.writeByte(4);
  83
  84                 extendedCommunitiesBuffer.writeBytes(Ipv4Util.bytesForAddress(inet4SpecificExtendedCommunity.getInet4SpecificExtendedCommunity().getGlobalAdministrator()));
  85                 extendedCommunitiesBuffer.writeBytes(inet4SpecificExtendedCommunity.getInet4SpecificExtendedCommunity().getLocalAdministrator());
  86             }
  87             if (extendedCommunities.getExtendedCommunity() instanceof OpaqueExtendedCommunityCase) {
  88                 OpaqueExtendedCommunityCase opaqueExtendedCommunity = (OpaqueExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  89                 //TODO resolve types correctly
  90                 extendedCommunitiesBuffer.writeByte(3);
  91                 extendedCommunitiesBuffer.writeByte(4);
  92
  93                 extendedCommunitiesBuffer.writeBytes(opaqueExtendedCommunity.getOpaqueExtendedCommunity().getValue());
  94             }
  95             if (extendedCommunities.getExtendedCommunity() instanceof RouteTargetExtendedCommunityCase) {
  96                 RouteTargetExtendedCommunityCase routeTargetExtendedCommunity = (RouteTargetExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
  97                 //TODO how to determine, which numbering space global administrator number is originated from
  98                 extendedCommunitiesBuffer.writeByte(0);
  99                 extendedCommunitiesBuffer.writeByte(2);
 100
 101                 extendedCommunitiesBuffer.writeShort(routeTargetExtendedCommunity.getRouteTargetExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
 102                 extendedCommunitiesBuffer.writeBytes(routeTargetExtendedCommunity.getRouteTargetExtendedCommunity().getLocalAdministrator());
 103             }
 104             if (extendedCommunities.getExtendedCommunity() instanceof RouteOriginExtendedCommunityCase) {
 105                 RouteOriginExtendedCommunityCase routeOriginExtendedCommunity = (RouteOriginExtendedCommunityCase) extendedCommunities.getExtendedCommunity();
 106                 //TODO how to determine, which numbering space global administrator number is originated from
 107                 extendedCommunitiesBuffer.writeByte(2);
 108                 extendedCommunitiesBuffer.writeByte(3);
 109                 extendedCommunitiesBuffer.writeShort(routeOriginExtendedCommunity.getRouteOriginExtendedCommunity().getGlobalAdministrator().getValue().shortValue());
 110                 extendedCommunitiesBuffer.writeBytes(routeOriginExtendedCommunity.getRouteOriginExtendedCommunity().getLocalAdministrator());
 111             }
 112             byteAggregator.writeByte(AttributeFlags.OPTIONAL);
 113             byteAggregator.writeByte(TYPE);
 114             byteAggregator.writeByte(extendedCommunitiesBuffer.writerIndex());
 115             byteAggregator.writeBytes(extendedCommunitiesBuffer);
 116         }
 117     }
 118 }