2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.protocol.bgp.parser.impl.message.update;
10 import com.google.common.base.Preconditions;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.Unpooled;
13 import org.opendaylight.protocol.bgp.parser.AttributeFlags;
14 import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
15 import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer;
16 import org.opendaylight.protocol.concepts.Ipv4Util;
17 import org.opendaylight.protocol.util.ByteArray;
18 import org.opendaylight.protocol.util.ReferenceCache;
19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.AsNumber;
20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
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.Aggregator;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AggregatorBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.update.PathAttributesBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.ShortAsNumber;
26 import org.opendaylight.yangtools.yang.binding.DataObject;
28 public final class AggregatorAttributeParser implements AttributeParser, AttributeSerializer {
30 public static final int TYPE = 7;
32 private final ReferenceCache refCache;
34 public AggregatorAttributeParser(final ReferenceCache refCache) {
35 this.refCache = Preconditions.checkNotNull(refCache);
39 * Parse AGGREGATOR from bytes
41 * @param buffer byte buffer to be parsed
42 * @return {@link Aggregator} BGP Aggregator
45 public void parseAttribute(final ByteBuf buffer, final PathAttributesBuilder builder) {
46 final AsNumber asNumber = this.refCache.getSharedReference(new AsNumber(buffer.readUnsignedInt()));
47 final Ipv4Address address = Ipv4Util.addressForBytes(ByteArray.readAllBytes(buffer));
48 builder.setAggregator(new AggregatorBuilder().setAsNumber(asNumber).setNetworkAddress(address).build());
52 public void serializeAttribute(DataObject attribute, ByteBuf byteAggregator) {
53 PathAttributes pathAttributes = (PathAttributes) attribute;
54 Aggregator aggregator = pathAttributes.getAggregator();
55 if (aggregator == null) {
58 Preconditions.checkArgument(aggregator.getAsNumber() != null, "Missing AS number that formed the aggregate route (encoded as 2 octets).");
59 ShortAsNumber shortAsNumber = new ShortAsNumber(aggregator.getAsNumber());
60 byteAggregator.writeByte(AttributeFlags.OPTIONAL | AttributeFlags.TRANSITIVE);
61 byteAggregator.writeByte(TYPE);
62 ByteBuf aggregatorBuffer = Unpooled.buffer();
63 aggregatorBuffer.writeInt(shortAsNumber.getValue().intValue());
64 aggregatorBuffer.writeBytes(Ipv4Util.bytesForAddress(aggregator.getNetworkAddress()));
65 byteAggregator.writeByte(aggregatorBuffer.writerIndex());
66 byteAggregator.writeBytes(aggregatorBuffer);