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 java.util.List;
13 import org.opendaylight.protocol.bgp.linkstate.attribute.sr.SidLabelIndexParser.Size;
14 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
15 import org.opendaylight.protocol.util.BitArray;
16 import org.opendaylight.protocol.util.ByteArray;
17 import org.opendaylight.protocol.util.Ipv4Util;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.ProtocolId;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjIds;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjIdsBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.AdjSidTlv;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.Weight;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.Flags;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCase;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCaseBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCase;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCaseBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.SidLabelIndex;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
30 import org.opendaylight.yangtools.yang.binding.DataContainer;
32 public final class SrLinkAttributesParser {
34 private static final int ISO_SYSTEM_ID_SIZE = 6;
35 private static final int RESERVED = 2;
38 private static final int ADDRESS_FAMILY_FLAG = 0;
39 private static final int BACKUP_ISIS = 1;
40 private static final int BACKUP_OSPF = 0;
41 private static final int VALUE_ISIS = 2;
42 private static final int VALUE_OSPF = 1;
43 private static final int VALUE_EPE = 0;
44 private static final int LOCAL_ISIS = 3;
45 private static final int LOCAL_OSPF = 2;
46 private static final int LOCAL_EPE = 1;
47 private static final int SET_ISIS = 4;
48 private static final int SET_OSPF = 3;
49 private static final int FLAGS_SIZE = 8;
64 private SrLinkAttributesParser() {
65 throw new UnsupportedOperationException();
68 public static AdjSidTlv parseAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
71 final SidLabelIndex sidValue;
72 if (buffer.isReadable()) {
73 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
74 adjFlags = parseFlags(flags, protocolId);
75 weight = new Weight(buffer.readUnsignedByte());
76 buffer.skipBytes(RESERVED);
77 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
83 return new AdjSidTlv() {
85 public Class<? extends DataContainer> getImplementedInterface() {
86 return AdjSidTlv.class;
89 public Weight getWeight() {
93 public SidLabelIndex getSidLabelIndex() {
97 public Flags getFlags() {
103 public static SrLanAdjIds parseLanAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
104 if (!buffer.isReadable()) {
105 return new SrLanAdjIdsBuilder().build();
107 final SrLanAdjIdsBuilder srLanAdjIdBuilder = new SrLanAdjIdsBuilder();
108 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
109 srLanAdjIdBuilder.setFlags(parseFlags(flags, protocolId));
110 srLanAdjIdBuilder.setWeight(new Weight(buffer.readUnsignedByte()));
111 buffer.skipBytes(RESERVED);
112 if (protocolId.equals(ProtocolId.IsisLevel1) || protocolId.equals(ProtocolId.IsisLevel2)) {
113 srLanAdjIdBuilder.setIsoSystemId(new IsoSystemIdentifier(ByteArray.readBytes(buffer, ISO_SYSTEM_ID_SIZE)));
114 } else if (protocolId.equals(ProtocolId.Ospf)) {
115 srLanAdjIdBuilder.setNeighborId(Ipv4Util.addressForByteBuf(buffer));
117 // length determines a type of next field, which is used for parsing
118 srLanAdjIdBuilder.setSidLabelIndex(SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer));
119 return srLanAdjIdBuilder.build();
122 private static Flags parseFlags(final BitArray flags, final ProtocolId protocol) {
123 if (protocol == null) {
126 if (protocol.equals(ProtocolId.IsisLevel1) || protocol.equals(ProtocolId.IsisLevel2)) {
127 return new IsisAdjFlagsCaseBuilder()
128 .setAddressFamily(flags.get(ADDRESS_FAMILY_FLAG))
129 .setBackup(flags.get(BACKUP_ISIS))
130 .setSet(flags.get(SET_ISIS)).build();
131 } else if (protocol.equals(ProtocolId.Ospf)) {
132 return new OspfAdjFlagsCaseBuilder()
133 .setBackup(flags.get(BACKUP_OSPF))
134 .setSet(flags.get(SET_OSPF)).build();
139 public static <T extends AdjSidTlv> void serializeAdjacencySegmentIdentifiers(final List<T> adjSids, final int type, final ByteBuf byteAggregator) {
140 for (final T id : adjSids) {
141 TlvUtil.writeTLV(type, serializeAdjacencySegmentIdentifier(id), byteAggregator);
145 public static ByteBuf serializeAdjacencySegmentIdentifier(final AdjSidTlv adjSid) {
146 final ByteBuf value = Unpooled.buffer();
147 final BitArray flags = serializeAdjFlags(adjSid.getFlags(), adjSid.getSidLabelIndex());
148 flags.toByteBuf(value);
149 value.writeByte(adjSid.getWeight().getValue());
150 value.writeZero(RESERVED);
151 value.writeBytes(SidLabelIndexParser.serializeSidValue(adjSid.getSidLabelIndex()));
155 public static void serializeLanAdjacencySegmentIdentifiers(final List<SrLanAdjIds> srLanAdjIds, final int srLanAdjId, final ByteBuf byteAggregator) {
156 for (final SrLanAdjIds id : srLanAdjIds) {
157 TlvUtil.writeTLV(srLanAdjId, serializeLanAdjacencySegmentIdentifier(id), byteAggregator);
161 public static ByteBuf serializeLanAdjacencySegmentIdentifier(final SrLanAdjIds srLanAdjId) {
162 final ByteBuf value = Unpooled.buffer();
163 final BitArray flags = serializeAdjFlags(srLanAdjId.getFlags(), srLanAdjId.getSidLabelIndex());
164 flags.toByteBuf(value);
165 value.writeByte(srLanAdjId.getWeight().getValue());
166 value.writeZero(RESERVED);
167 if (srLanAdjId.getIsoSystemId() != null) {
168 value.writeBytes(srLanAdjId.getIsoSystemId().getValue());
169 } else if (srLanAdjId.getNeighborId() != null) {
170 value.writeBytes(Ipv4Util.byteBufForAddress(srLanAdjId.getNeighborId()));
172 value.writeBytes(SidLabelIndexParser.serializeSidValue(srLanAdjId.getSidLabelIndex()));
176 private static BitArray serializeAdjFlags(final Flags flags, final SidLabelIndex sidLabelIndex) {
177 final BitArray bitFlags = new BitArray(FLAGS_SIZE);
178 if (flags instanceof OspfAdjFlagsCase) {
179 final OspfAdjFlagsCase ospfFlags = (OspfAdjFlagsCase) flags;
180 bitFlags.set(BACKUP_OSPF, ospfFlags.isBackup());
181 bitFlags.set(SET_OSPF, ospfFlags.isSet());
182 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_OSPF, LOCAL_OSPF);
183 } else if (flags instanceof IsisAdjFlagsCase) {
184 final IsisAdjFlagsCase isisFlags = (IsisAdjFlagsCase) flags;
185 bitFlags.set(ADDRESS_FAMILY_FLAG, isisFlags.isAddressFamily());
186 bitFlags.set(BACKUP_ISIS, isisFlags.isBackup());
187 bitFlags.set(SET_ISIS, isisFlags.isSet());
188 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_ISIS, LOCAL_ISIS);
189 } else if (flags == null){
190 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_EPE, LOCAL_EPE);