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.impl.attribute.sr;
10 import static org.opendaylight.protocol.bgp.linkstate.impl.attribute.LinkAttributesParser.SR_LAN_ADJ_ID;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.Unpooled;
14 import java.util.List;
15 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.SidLabelIndexParser.Size;
16 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
17 import org.opendaylight.protocol.util.BitArray;
18 import org.opendaylight.protocol.util.ByteArray;
19 import org.opendaylight.protocol.util.Ipv4Util;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.ProtocolId;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrAdjIds;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrAdjIdsBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrLanAdjIds;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrLanAdjIdsBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.EpeAdjSidTlv;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.Weight;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.Flags;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCase;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCaseBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCase;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCaseBuilder;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.SidLabelIndex;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
34 import org.opendaylight.yangtools.yang.binding.DataContainer;
36 public final class SrLinkAttributesParser {
38 private static final int ISO_SYSTEM_ID_SIZE = 6;
39 private static final int RESERVED = 2;
42 private static final int ADDRESS_FAMILY_FLAG = 0;
43 private static final int BACKUP_ISIS = 1;
44 private static final int BACKUP_OSPF = 0;
45 private static final int VALUE_ISIS = 2;
46 private static final int VALUE_OSPF = 1;
47 private static final int VALUE_EPE = 0;
48 private static final int LOCAL_ISIS = 3;
49 private static final int LOCAL_OSPF = 2;
50 private static final int LOCAL_EPE = 1;
51 private static final int SET_ISIS = 4;
52 private static final int SET_OSPF = 3;
53 private static final int FLAGS_BITS_SIZE = 8;
54 private static final int FLAGS_BYTE_SIZE = 1;
70 private SrLinkAttributesParser() {
74 public static SrAdjIds parseAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
77 final SidLabelIndex sidValue;
78 if (buffer.isReadable()) {
79 final BitArray flags = BitArray.valueOf(buffer, FLAGS_BITS_SIZE);
80 adjFlags = parseFlags(flags, protocolId);
81 weight = new Weight(buffer.readUnsignedByte());
82 buffer.skipBytes(RESERVED);
83 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
89 return new SrAdjIdsBuilder().setFlags(adjFlags).setSidLabelIndex(sidValue).setWeight(weight).build();
92 public static EpeAdjSidTlv parseEpeAdjacencySegmentIdentifier(final ByteBuf buffer) {
94 final SidLabelIndex sidValue;
95 if (buffer.isReadable()) {
96 buffer.skipBytes(FLAGS_BYTE_SIZE);
97 weight = new Weight(buffer.readUnsignedByte());
98 buffer.skipBytes(RESERVED);
99 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
104 return new EpeAdjSidTlv() {
106 public Class<? extends DataContainer> getImplementedInterface() {
107 return EpeAdjSidTlv.class;
111 public Weight getWeight() {
116 public SidLabelIndex getSidLabelIndex() {
122 public static SrLanAdjIds parseLanAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
123 if (!buffer.isReadable()) {
124 return new SrLanAdjIdsBuilder().build();
126 final SrLanAdjIdsBuilder srLanAdjIdBuilder = new SrLanAdjIdsBuilder();
127 final BitArray flags = BitArray.valueOf(buffer, FLAGS_BITS_SIZE);
128 srLanAdjIdBuilder.setFlags(parseFlags(flags, protocolId));
129 srLanAdjIdBuilder.setWeight(new Weight(buffer.readUnsignedByte()));
130 buffer.skipBytes(RESERVED);
131 switch (protocolId) {
134 srLanAdjIdBuilder.setIsoSystemId(new IsoSystemIdentifier(
135 ByteArray.readBytes(buffer, ISO_SYSTEM_ID_SIZE)));
139 srLanAdjIdBuilder.setNeighborId(Ipv4Util.addressForByteBuf(buffer));
144 // length determines a type of next field, which is used for parsing
145 srLanAdjIdBuilder.setSidLabelIndex(SidLabelIndexParser.parseSidLabelIndex(
146 Size.forValue(buffer.readableBytes()), buffer));
147 return srLanAdjIdBuilder.build();
150 private static Flags parseFlags(final BitArray flags, final ProtocolId protocol) {
151 if (protocol == null) {
157 return new IsisAdjFlagsCaseBuilder().setAddressFamily(flags.get(ADDRESS_FAMILY_FLAG))
158 .setBackup(flags.get(BACKUP_ISIS))
159 .setSet(flags.get(SET_ISIS)).build();
162 return new OspfAdjFlagsCaseBuilder().setBackup(flags.get(BACKUP_OSPF)).setSet(flags.get(SET_OSPF))
169 public static <T extends EpeAdjSidTlv> void serializeAdjacencySegmentIdentifiers(final List<T> adjSids,
170 final int type, final ByteBuf byteAggregator) {
171 adjSids.forEach(id -> TlvUtil.writeTLV(type, serializeAdjacencySegmentIdentifier(id), byteAggregator));
174 public static <T extends EpeAdjSidTlv> ByteBuf serializeAdjacencySegmentIdentifier(final T adjSid) {
175 final ByteBuf value = Unpooled.buffer();
176 if (adjSid instanceof SrAdjIds) {
177 final BitArray flags = serializeAdjFlags(((SrAdjIds) adjSid).getFlags(), adjSid.getSidLabelIndex());
178 flags.toByteBuf(value);
180 value.writeZero(FLAGS_BYTE_SIZE);
182 value.writeByte(adjSid.getWeight().getValue());
183 value.writeZero(RESERVED);
184 value.writeBytes(SidLabelIndexParser.serializeSidValue(adjSid.getSidLabelIndex()));
188 public static void serializeLanAdjacencySegmentIdentifiers(final List<SrLanAdjIds> srLanAdjIds,
189 final ByteBuf byteAggregator) {
190 for (final SrLanAdjIds id : srLanAdjIds) {
191 TlvUtil.writeTLV(SR_LAN_ADJ_ID, serializeLanAdjacencySegmentIdentifier(id), byteAggregator);
195 public static ByteBuf serializeLanAdjacencySegmentIdentifier(final SrLanAdjIds srLanAdjId) {
196 final ByteBuf value = Unpooled.buffer();
197 final BitArray flags = serializeAdjFlags(srLanAdjId.getFlags(), srLanAdjId.getSidLabelIndex());
198 flags.toByteBuf(value);
199 value.writeByte(srLanAdjId.getWeight().getValue());
200 value.writeZero(RESERVED);
201 if (srLanAdjId.getIsoSystemId() != null) {
202 value.writeBytes(srLanAdjId.getIsoSystemId().getValue());
203 } else if (srLanAdjId.getNeighborId() != null) {
204 value.writeBytes(Ipv4Util.byteBufForAddress(srLanAdjId.getNeighborId()));
206 value.writeBytes(SidLabelIndexParser.serializeSidValue(srLanAdjId.getSidLabelIndex()));
210 private static BitArray serializeAdjFlags(final Flags flags, final SidLabelIndex sidLabelIndex) {
211 final BitArray bitFlags = new BitArray(FLAGS_BITS_SIZE);
212 if (flags instanceof OspfAdjFlagsCase) {
213 final OspfAdjFlagsCase ospfFlags = (OspfAdjFlagsCase) flags;
214 bitFlags.set(BACKUP_OSPF, ospfFlags.isBackup());
215 bitFlags.set(SET_OSPF, ospfFlags.isSet());
216 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_OSPF, LOCAL_OSPF);
217 } else if (flags instanceof IsisAdjFlagsCase) {
218 final IsisAdjFlagsCase isisFlags = (IsisAdjFlagsCase) flags;
219 bitFlags.set(ADDRESS_FAMILY_FLAG, isisFlags.isAddressFamily());
220 bitFlags.set(BACKUP_ISIS, isisFlags.isBackup());
221 bitFlags.set(SET_ISIS, isisFlags.isSet());
222 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_ISIS, LOCAL_ISIS);
223 } else if (flags == null) {
224 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_EPE, LOCAL_EPE);