2 * Copyright (c) 2018 AT&T Intellectual Property. 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
9 package org.opendaylight.protocol.bgp.mvpn.impl.attributes;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.Unpooled;
13 import org.opendaylight.protocol.bgp.mvpn.spi.pojo.attributes.tunnel.identifier.SimpleTunnelIdentifierRegistry;
14 import org.opendaylight.protocol.bgp.parser.spi.AttributeParser;
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.util.MplsLabelUtil;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.Attributes;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.AttributesBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.MplsLabel;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.bgp.rib.route.PmsiTunnelAugmentation;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.bgp.rib.route.PmsiTunnelAugmentationBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.pmsi.tunnel.PmsiTunnel;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.pmsi.tunnel.PmsiTunnelBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.pmsi.tunnel.pmsi.tunnel.TunnelIdentifier;
27 import org.opendaylight.yangtools.yang.binding.DataObject;
30 * PE Distinguisher Labels Attribute Handler.
31 * https://tools.ietf.org/html/rfc6514#section-5
33 * @author Claudio D. Gasparini
35 public final class PMSITunnelAttributeHandler implements AttributeParser, AttributeSerializer {
36 private static final int PMSI_ATTRIBUTE = 22;
37 private static final int MPLS_LENGTH = 3;
38 private final SimpleTunnelIdentifierRegistry tunnelIdentifierHandler =
39 SimpleTunnelIdentifierRegistry.getInstance();
41 private static void parseMpls(final PmsiTunnelBuilder pmsiTunnelBuilder, final ByteBuf buffer) {
42 final MplsLabel mpls = MplsLabelUtil.mplsLabelForByteBuf(buffer);
43 if (mpls.getValue().toJava() != 0) {
44 pmsiTunnelBuilder.setMplsLabel(mpls);
48 private static void serializeMpls(final MplsLabel mplsLabel, final ByteBuf body) {
49 if (mplsLabel == null) {
50 body.writeZero(MPLS_LENGTH);
53 body.writeBytes(MplsLabelUtil.byteBufForMplsLabel(mplsLabel));
56 private static void serializeFlag(final PmsiTunnel pmsiTunnelAttribute, final ByteBuf body) {
57 body.writeBoolean(pmsiTunnelAttribute.isLeafInformationRequired());
61 public void parseAttribute(final ByteBuf buffer, final AttributesBuilder builder,
62 final PeerSpecificParserConstraint constraint) {
63 // FIXME: BGPCEP-359: what is the error handling here?
64 if (!buffer.isReadable()) {
67 final PmsiTunnelBuilder pmsiTunnelBuilder = new PmsiTunnelBuilder();
68 pmsiTunnelBuilder.setLeafInformationRequired(buffer.readBoolean());
69 final int tunnelType = buffer.readUnsignedByte();
70 parseMpls(pmsiTunnelBuilder, buffer);
71 final TunnelIdentifier tunnelIdentifier = this.tunnelIdentifierHandler.parse(tunnelType, buffer);
72 if (tunnelIdentifier != null) {
73 pmsiTunnelBuilder.setTunnelIdentifier(tunnelIdentifier);
75 builder.addAugmentation(new PmsiTunnelAugmentationBuilder().setPmsiTunnel(pmsiTunnelBuilder.build()).build());
78 public int getType() {
79 return PMSI_ATTRIBUTE;
83 public void serializeAttribute(final Attributes attribute, final ByteBuf byteAggregator) {
84 final PmsiTunnelAugmentation pmsiTunnelAugmentation = attribute
85 .augmentation(PmsiTunnelAugmentation.class);
86 if (pmsiTunnelAugmentation == null) {
90 final PmsiTunnel pmsiTunnelAttribute = pmsiTunnelAugmentation.getPmsiTunnel();
91 final TunnelIdentifier tunnel = pmsiTunnelAttribute.getTunnelIdentifier();
92 final ByteBuf tunnelBuffer = Unpooled.buffer();
93 final int tunnelType = this.tunnelIdentifierHandler.serialize(tunnel, tunnelBuffer);
94 final ByteBuf body = Unpooled.buffer();
95 serializeFlag(pmsiTunnelAttribute, body);
96 body.writeByte(tunnelType);
97 serializeMpls(pmsiTunnelAttribute.getMplsLabel(), body);
98 body.writeBytes(tunnelBuffer);
99 AttributeUtil.formatAttribute(AttributeUtil.OPTIONAL | AttributeUtil.TRANSITIVE, getType(), body,
103 public Class<? extends DataObject> getClazz() {
104 return org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev200120.PmsiTunnel.class;