2 * Copyright (c) 2015 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.linkstate.impl.attribute.sr;
10 import static org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.binding.sid.sub.tlvs.SIDParser.SID_TYPE;
12 import io.netty.buffer.ByteBuf;
13 import java.util.ArrayList;
14 import java.util.List;
15 import org.opendaylight.mdsal.uint24.netty.Uint24ByteBufUtils;
16 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
17 import org.opendaylight.protocol.util.BitArray;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.ProtocolId;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrAlgorithm;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrAlgorithmBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrCapabilities;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrCapabilitiesBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.Algorithm;
25 public final class SrNodeAttributesParser {
27 private static final int FLAGS_SIZE = 8;
28 /* SR Capabilities flags */
29 private static final int MPLS_IPV4 = 0;
30 private static final int MPLS_IPV6 = 1;
31 private static final int SR_IPV6 = 2;
32 private static final int RESERVERED = 1;
34 private SrNodeAttributesParser() {
38 public static SrCapabilities parseSrCapabilities(final ByteBuf buffer, final ProtocolId protocol) {
39 final SrCapabilitiesBuilder builder = new SrCapabilitiesBuilder();
40 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
41 setFlags(flags, protocol, builder);
42 buffer.skipBytes(RESERVERED);
43 builder.setRangeSize(Uint24ByteBufUtils.readUint24(buffer));
44 builder.setSidLabelIndex(SidLabelIndexParser.parseSidSubTlv(buffer));
45 return builder.build();
48 private static void setFlags(final BitArray flags, final ProtocolId protocol, final SrCapabilitiesBuilder builder) {
49 if (protocol.equals(ProtocolId.IsisLevel1) || protocol.equals(ProtocolId.IsisLevel2)) {
50 builder.setMplsIpv4(flags.get(MPLS_IPV4));
51 builder.setMplsIpv6(flags.get(MPLS_IPV6));
52 builder.setSrIpv6(flags.get(SR_IPV6));
54 builder.setMplsIpv4(Boolean.FALSE);
55 builder.setMplsIpv6(Boolean.FALSE);
56 builder.setSrIpv6(Boolean.FALSE);
60 public static void serializeSrCapabilities(final SrCapabilities caps, final ByteBuf buffer) {
61 final BitArray bs = new BitArray(FLAGS_SIZE);
62 bs.set(MPLS_IPV4, caps.isMplsIpv4());
63 bs.set(MPLS_IPV6, caps.isMplsIpv6());
64 bs.set(SR_IPV6, caps.isSrIpv6());
66 buffer.writeZero(RESERVERED);
67 Uint24ByteBufUtils.writeUint24(buffer, caps.getRangeSize());
68 TlvUtil.writeTLV(SID_TYPE, SidLabelIndexParser.serializeSidValue(caps.getSidLabelIndex()), buffer);
71 public static SrAlgorithm parseSrAlgorithms(final ByteBuf buffer) {
72 final SrAlgorithmBuilder builder = new SrAlgorithmBuilder();
73 final List<Algorithm> algs = new ArrayList<>();
74 while (buffer.isReadable()) {
75 algs.add(Algorithm.forValue(buffer.readUnsignedByte()));
77 builder.setAlgorithms(algs);
78 return builder.build();
81 public static void serializeSrAlgorithms(final SrAlgorithm alg, final ByteBuf buffer) {
82 if (alg.getAlgorithms() != null) {
83 for (final Algorithm a : alg.getAlgorithms()) {
84 buffer.writeByte(a.getIntValue());