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.SrAdjIds;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrAdjIdsBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjIds;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjIdsBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.EpeAdjSidTlv;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.Weight;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.Flags;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCase;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.IsisAdjFlagsCaseBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCase;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.adj.flags.flags.OspfAdjFlagsCaseBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.SidLabelIndex;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
32 import org.opendaylight.yangtools.yang.binding.DataContainer;
34 public final class SrLinkAttributesParser {
36 private static final int ISO_SYSTEM_ID_SIZE = 6;
37 private static final int RESERVED = 2;
40 private static final int ADDRESS_FAMILY_FLAG = 0;
41 private static final int BACKUP_ISIS = 1;
42 private static final int BACKUP_OSPF = 0;
43 private static final int VALUE_ISIS = 2;
44 private static final int VALUE_OSPF = 1;
45 private static final int VALUE_EPE = 0;
46 private static final int LOCAL_ISIS = 3;
47 private static final int LOCAL_OSPF = 2;
48 private static final int LOCAL_EPE = 1;
49 private static final int SET_ISIS = 4;
50 private static final int SET_OSPF = 3;
51 private static final int FLAGS_BITS_SIZE = 8;
52 private static final int FLAGS_BYTE_SIZE = 1;
67 private SrLinkAttributesParser() {
68 throw new UnsupportedOperationException();
71 public static SrAdjIds parseAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
74 final SidLabelIndex sidValue;
75 if (buffer.isReadable()) {
76 final BitArray flags = BitArray.valueOf(buffer, FLAGS_BITS_SIZE);
77 adjFlags = parseFlags(flags, protocolId);
78 weight = new Weight(buffer.readUnsignedByte());
79 buffer.skipBytes(RESERVED);
80 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
86 return new SrAdjIdsBuilder().setFlags(adjFlags).setSidLabelIndex(sidValue).setWeight(weight).build();
89 public static EpeAdjSidTlv parseEpeAdjacencySegmentIdentifier(final ByteBuf buffer) {
91 final SidLabelIndex sidValue;
92 if (buffer.isReadable()) {
93 buffer.skipBytes(FLAGS_BYTE_SIZE);
94 weight = new Weight(buffer.readUnsignedByte());
95 buffer.skipBytes(RESERVED);
96 sidValue = SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer);
101 return new EpeAdjSidTlv() {
103 public Class<? extends DataContainer> getImplementedInterface() {
104 return EpeAdjSidTlv.class;
107 public Weight getWeight() {
111 public SidLabelIndex getSidLabelIndex() {
117 public static SrLanAdjIds parseLanAdjacencySegmentIdentifier(final ByteBuf buffer, final ProtocolId protocolId) {
118 if (!buffer.isReadable()) {
119 return new SrLanAdjIdsBuilder().build();
121 final SrLanAdjIdsBuilder srLanAdjIdBuilder = new SrLanAdjIdsBuilder();
122 final BitArray flags = BitArray.valueOf(buffer, FLAGS_BITS_SIZE);
123 srLanAdjIdBuilder.setFlags(parseFlags(flags, protocolId));
124 srLanAdjIdBuilder.setWeight(new Weight(buffer.readUnsignedByte()));
125 buffer.skipBytes(RESERVED);
126 switch (protocolId) {
129 srLanAdjIdBuilder.setIsoSystemId(new IsoSystemIdentifier(ByteArray.readBytes(buffer, ISO_SYSTEM_ID_SIZE)));
133 srLanAdjIdBuilder.setNeighborId(Ipv4Util.addressForByteBuf(buffer));
136 // length determines a type of next field, which is used for parsing
137 srLanAdjIdBuilder.setSidLabelIndex(SidLabelIndexParser.parseSidLabelIndex(Size.forValue(buffer.readableBytes()), buffer));
138 return srLanAdjIdBuilder.build();
141 private static Flags parseFlags(final BitArray flags, final ProtocolId protocol) {
142 if (protocol == null) {
148 return new IsisAdjFlagsCaseBuilder().setAddressFamily(flags.get(ADDRESS_FAMILY_FLAG)).setBackup(flags.get(BACKUP_ISIS))
149 .setSet(flags.get(SET_ISIS)).build();
152 return new OspfAdjFlagsCaseBuilder().setBackup(flags.get(BACKUP_OSPF)).setSet(flags.get(SET_OSPF)).build();
158 public static <T extends EpeAdjSidTlv> void serializeAdjacencySegmentIdentifiers(final List<T> adjSids, final int type, final ByteBuf byteAggregator) {
159 adjSids.forEach(id -> TlvUtil.writeTLV(type, serializeAdjacencySegmentIdentifier(id), byteAggregator));
162 public static <T extends EpeAdjSidTlv> ByteBuf serializeAdjacencySegmentIdentifier(final T adjSid) {
163 final ByteBuf value = Unpooled.buffer();
164 if(adjSid instanceof SrAdjIds) {
165 final BitArray flags = serializeAdjFlags(((SrAdjIds) adjSid).getFlags(), adjSid.getSidLabelIndex());
166 flags.toByteBuf(value);
168 value.writeZero(FLAGS_BYTE_SIZE);
170 value.writeByte(adjSid.getWeight().getValue());
171 value.writeZero(RESERVED);
172 value.writeBytes(SidLabelIndexParser.serializeSidValue(adjSid.getSidLabelIndex()));
176 public static void serializeLanAdjacencySegmentIdentifiers(final List<SrLanAdjIds> srLanAdjIds, final int srLanAdjId, final ByteBuf byteAggregator) {
177 for (final SrLanAdjIds id : srLanAdjIds) {
178 TlvUtil.writeTLV(srLanAdjId, serializeLanAdjacencySegmentIdentifier(id), byteAggregator);
182 public static ByteBuf serializeLanAdjacencySegmentIdentifier(final SrLanAdjIds srLanAdjId) {
183 final ByteBuf value = Unpooled.buffer();
184 final BitArray flags = serializeAdjFlags(srLanAdjId.getFlags(), srLanAdjId.getSidLabelIndex());
185 flags.toByteBuf(value);
186 value.writeByte(srLanAdjId.getWeight().getValue());
187 value.writeZero(RESERVED);
188 if (srLanAdjId.getIsoSystemId() != null) {
189 value.writeBytes(srLanAdjId.getIsoSystemId().getValue());
190 } else if (srLanAdjId.getNeighborId() != null) {
191 value.writeBytes(Ipv4Util.byteBufForAddress(srLanAdjId.getNeighborId()));
193 value.writeBytes(SidLabelIndexParser.serializeSidValue(srLanAdjId.getSidLabelIndex()));
197 private static BitArray serializeAdjFlags(final Flags flags, final SidLabelIndex sidLabelIndex) {
198 final BitArray bitFlags = new BitArray(FLAGS_BITS_SIZE);
199 if (flags instanceof OspfAdjFlagsCase) {
200 final OspfAdjFlagsCase ospfFlags = (OspfAdjFlagsCase) flags;
201 bitFlags.set(BACKUP_OSPF, ospfFlags.isBackup());
202 bitFlags.set(SET_OSPF, ospfFlags.isSet());
203 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_OSPF, LOCAL_OSPF);
204 } else if (flags instanceof IsisAdjFlagsCase) {
205 final IsisAdjFlagsCase isisFlags = (IsisAdjFlagsCase) flags;
206 bitFlags.set(ADDRESS_FAMILY_FLAG, isisFlags.isAddressFamily());
207 bitFlags.set(BACKUP_ISIS, isisFlags.isBackup());
208 bitFlags.set(SET_ISIS, isisFlags.isSet());
209 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_ISIS, LOCAL_ISIS);
210 } else if (flags == null){
211 SidLabelIndexParser.setFlags(sidLabelIndex, bitFlags, VALUE_EPE, LOCAL_EPE);