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 static java.util.Objects.requireNonNull;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.Unpooled;
14 import org.opendaylight.protocol.bgp.parser.spi.AbstractAttributeParser;
15 import org.opendaylight.protocol.bgp.parser.spi.AttributeSerializer;
16 import org.opendaylight.protocol.bgp.parser.spi.AttributeUtil;
17 import org.opendaylight.protocol.bgp.parser.spi.PeerSpecificParserConstraint;
18 import org.opendaylight.protocol.bgp.parser.spi.RevisedErrorHandling;
19 import org.opendaylight.protocol.util.Ipv4Util;
20 import org.opendaylight.protocol.util.ReferenceCache;
21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.Attributes;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.AttributesBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.Aggregator;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.AggregatorBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.ShortAsNumber;
27 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * Parser/serializer for {@link Aggregator}.
34 public final class AggregatorAttributeParser extends AbstractAttributeParser implements AttributeSerializer {
35 private static final Logger LOG = LoggerFactory.getLogger(AggregatorAttributeParser.class);
36 private static final int AGGREGATOR_LENGTH = 8;
37 public static final int TYPE = 7;
39 private final ReferenceCache refCache;
41 public AggregatorAttributeParser(final ReferenceCache refCache) {
42 this.refCache = requireNonNull(refCache);
46 public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder,
47 final RevisedErrorHandling errorHandling, final PeerSpecificParserConstraint constraint) {
48 if (buffer.readableBytes() != AGGREGATOR_LENGTH && errorHandling != RevisedErrorHandling.NONE) {
49 // RFC7606: we do not support non-4-octet AS number peers, perform attribute-discard
50 LOG.debug("Discarded malformed AGGREGATOR attribute");
54 builder.setAggregator(new AggregatorBuilder()
55 // FIXME: above check should be expanded, so we report at least underflow errors
56 .setAsNumber(this.refCache.getSharedReference(new AsNumber(ByteBufUtils.readUint32(buffer))))
57 .setNetworkAddress(Ipv4Util.addressForByteBuf(buffer))
62 public void serializeAttribute(final Attributes pathAttributes, final ByteBuf byteAggregator) {
63 final Aggregator aggregator = pathAttributes.getAggregator();
64 if (aggregator != null) {
65 final AsNumber asNumber = aggregator.getAsNumber();
66 if (asNumber != null) {
67 AttributeUtil.formatAttribute(AttributeUtil.OPTIONAL | AttributeUtil.TRANSITIVE, TYPE,
68 Unpooled.buffer(AGGREGATOR_LENGTH)
69 .writeInt(new ShortAsNumber(asNumber).getValue().intValue())
70 .writeBytes(Ipv4Util.bytesForAddress(aggregator.getNetworkAddress())),