2 * Copyright (c) 2014 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.attribute.sr;
10 import io.netty.buffer.ByteBuf;
11 import io.netty.buffer.Unpooled;
12 import org.opendaylight.protocol.bgp.linkstate.attribute.sr.SidLabelIndexParser.Size;
13 import org.opendaylight.protocol.util.BitArray;
14 import org.opendaylight.protocol.util.ByteArray;
15 import org.opendaylight.protocol.util.Ipv4Util;
16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.ProtocolId;
17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjId;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjIdBuilder;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.AdjSidTlv;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.Weight;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.Flags;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCase;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCaseBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCase;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCaseBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.SidLabelIndex;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
28 import org.opendaylight.yangtools.yang.binding.DataContainer;
30 public final class SrLinkAttributesParser {
32 private static final int ISO_SYSTEM_ID_SIZE = 6;
33 private static final int RESERVED = 2;
36 private static final int ADDRESS_FAMILY_FLAG = 0;
37 private static final int BACKUP_ISIS = 1;
38 private static final int BACKUP_OSPF = 0;
39 private static final int VALUE_ISIS = 2;
40 private static final int VALUE_OSPF = 1;
41 private static final int LOCAL_ISIS = 3;
42 private static final int LOCAL_OSPF = 2;
43 private static final int SET_ISIS = 4;
44 private static final int SET_OSPF = 3;
45 private static final int FLAGS_SIZE = 8;
60 private SrLinkAttributesParser() {
61 throw new UnsupportedOperationException();
64 public static AdjSidTlv parseAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
67 final SidLabelIndex sidValue;
68 if (buffer.isReadable()) {
69 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
70 adjFlags = parseFlags(flags, protocolId);
71 weight = new Weight(buffer.readUnsignedByte());
72 buffer.skipBytes(RESERVED);
73 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
79 return new AdjSidTlv() {
81 public Class<? extends DataContainer> getImplementedInterface() {
82 return AdjSidTlv.class;
85 public Weight getWeight() {
89 public SidLabelIndex getSidLabelIndex() {
93 public Flags getFlags() {
99 public static SrLanAdjId parseLanAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
100 if (!buffer.isReadable()) {
101 return new SrLanAdjIdBuilder().build();
103 final SrLanAdjIdBuilder srLanAdjIdBuilder = new SrLanAdjIdBuilder();
104 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
105 srLanAdjIdBuilder.setFlags(parseFlags(flags, protocolId));
106 srLanAdjIdBuilder.setWeight(new Weight(buffer.readUnsignedByte()));
107 buffer.skipBytes(RESERVED);
108 if (protocolId.equals(ProtocolId.IsisLevel1) || protocolId.equals(ProtocolId.IsisLevel2)) {
109 srLanAdjIdBuilder.setIsoSystemId(new IsoSystemIdentifier(ByteArray.readBytes(buffer, ISO_SYSTEM_ID_SIZE)));
110 } else if (protocolId.equals(ProtocolId.Ospf)) {
111 srLanAdjIdBuilder.setNeighborId(Ipv4Util.addressForByteBuf(buffer));
113 // length determines a type of next field, which is used for parsing
114 srLanAdjIdBuilder.setSidLabelIndex(SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer));
115 return srLanAdjIdBuilder.build();
118 private static Flags parseFlags(final BitArray flags, final ProtocolId protocol) {
119 if (protocol.equals(ProtocolId.IsisLevel1) || protocol.equals(ProtocolId.IsisLevel2)) {
120 return new IsisAdjFlagsCaseBuilder()
121 .setAddressFamily(flags.get(ADDRESS_FAMILY_FLAG))
122 .setBackup(flags.get(BACKUP_ISIS))
123 .setSet(flags.get(SET_ISIS)).build();
124 } else if (protocol.equals(ProtocolId.Ospf)) {
125 return new OspfAdjFlagsCaseBuilder()
126 .setBackup(flags.get(BACKUP_OSPF))
127 .setSet(flags.get(SET_OSPF)).build();
132 public static ByteBuf serializeAdjacencySegmentIdentifier(final AdjSidTlv adjSid) {
133 final ByteBuf value = Unpooled.buffer();
134 final BitArray flags = serializeAdjFlags(adjSid.getFlags(), adjSid.getSidLabelIndex());
135 flags.toByteBuf(value);
136 value.writeByte(adjSid.getWeight().getValue());
137 value.writeZero(RESERVED);
138 value.writeBytes(SidLabelIndexParser.serializeSidValue(adjSid.getSidLabelIndex()));
142 public static ByteBuf serializeLanAdjacencySegmentIdentifier(final SrLanAdjId srLanAdjId) {
143 final ByteBuf value = Unpooled.buffer();
144 final BitArray flags = serializeAdjFlags(srLanAdjId.getFlags(), srLanAdjId.getSidLabelIndex());
145 flags.toByteBuf(value);
146 value.writeByte(srLanAdjId.getWeight().getValue());
147 value.writeZero(RESERVED);
148 if (srLanAdjId.getIsoSystemId() != null) {
149 value.writeBytes(srLanAdjId.getIsoSystemId().getValue());
150 } else if (srLanAdjId.getNeighborId() != null) {
151 value.writeBytes(Ipv4Util.byteBufForAddress(srLanAdjId.getNeighborId()));
153 value.writeBytes(SidLabelIndexParser.serializeSidValue(srLanAdjId.getSidLabelIndex()));
157 private static BitArray serializeAdjFlags(final Flags flags, final SidLabelIndex sidLabelIndex) {
158 final BitArray bitFlags = new BitArray(FLAGS_SIZE);
159 if (flags instanceof OspfAdjFlagsCase) {
160 final OspfAdjFlagsCase ospfFlags = (OspfAdjFlagsCase) flags;
161 bitFlags.set(BACKUP_OSPF, ospfFlags.isBackup());
162 bitFlags.set(SET_OSPF, ospfFlags.isSet());
163 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_OSPF, LOCAL_OSPF);
164 } else if (flags instanceof IsisAdjFlagsCase) {
165 final IsisAdjFlagsCase isisFlags = (IsisAdjFlagsCase) flags;
166 bitFlags.set(ADDRESS_FAMILY_FLAG, isisFlags.isAddressFamily());
167 bitFlags.set(BACKUP_ISIS, isisFlags.isBackup());
168 bitFlags.set(SET_ISIS, isisFlags.isSet());
169 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_ISIS, LOCAL_ISIS);