bgp/extensions/linkstate/src/main/java/org/opendaylight/protocol/bgp/linkstate/impl/attribute/LinkAttributesParser.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.bgp.linkstate.impl.attribute;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.collect.Multimap;
  12 import io.netty.buffer.ByteBuf;
  13 import io.netty.buffer.ByteBufUtil;
  14 import io.netty.buffer.Unpooled;
  15 import java.nio.charset.StandardCharsets;
  16 import java.util.ArrayList;
  17 import java.util.List;
  18 import java.util.Map;
  19 import java.util.Map.Entry;
  20 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.SrLinkAttributesParser;
  21 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
  22 import org.opendaylight.protocol.util.BitArray;
  23 import org.opendaylight.protocol.util.ByteArray;
  24 import org.opendaylight.protocol.util.Ipv4Util;
  25 import org.opendaylight.protocol.util.Ipv6Util;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
  27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6AddressNoZone;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.AdministrativeGroup;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.Delay;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.Ipv4RouterIdentifier;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.Ipv6RouterIdentifier;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.LinkProtectionType;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.Loss;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.MplsProtocolMask;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.ProtocolId;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.LinkMinMaxDelay;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.LinkMinMaxDelayBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerAdjSid;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerAdjSidBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerNodeSid;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerNodeSidBuilder;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerSetSids;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.PeerSetSidsBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.SrAdjIds;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.SrLanAdjIds;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.UnreservedBandwidth;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.UnreservedBandwidthBuilder;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.attribute.UnreservedBandwidthKey;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.LinkStateAttribute;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.LinkAttributesCase;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.LinkAttributesCaseBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributes;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributesBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Bandwidth;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Metric;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.TeMetric;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.SrlgId;
  58 import org.opendaylight.yangtools.yang.common.Uint8;
  59 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
  60 import org.slf4j.Logger;
  61 import org.slf4j.LoggerFactory;
  62
  63 @VisibleForTesting
  64 public final class LinkAttributesParser {
  65     public static final int SR_LAN_ADJ_ID = 1100;
  66
  67     private static final Logger LOG = LoggerFactory.getLogger(LinkAttributesParser.class);
  68     private static final int UNRESERVED_BW_COUNT = 8;
  69
  70     private static final int BANDWIDTH_LENGTH = 4;
  71
  72     // MPLS protection mask bits
  73     private static final int FLAGS_SIZE = 8;
  74
  75     private static final int LDP_BIT = 0;
  76     private static final int RSVP_BIT = 1;
  77
  78     /* Link Attribute TLVs */
  79     private static final int REMOTE_IPV4_ROUTER_ID = 1030;
  80     private static final int REMOTE_IPV6_ROUTER_ID = 1031;
  81     private static final int ADMIN_GROUP = 1088;
  82     private static final int MAX_BANDWIDTH = 1089;
  83     private static final int MAX_RESERVABLE_BANDWIDTH = 1090;
  84     private static final int UNRESERVED_BANDWIDTH = 1091;
  85     private static final int TE_METRIC = 1092;
  86     private static final int LINK_PROTECTION_TYPE = 1093;
  87     private static final int MPLS_PROTOCOL = 1094;
  88     private static final int METRIC = 1095;
  89     private static final int SHARED_RISK_LINK_GROUP = 1096;
  90     private static final int LINK_OPAQUE = 1097;
  91     private static final int LINK_NAME = 1098;
  92     private static final int SR_ADJ_ID = 1099;
  93     private static final int PEER_NODE_SID_CODE = 1101;
  94     private static final int PEER_ADJ_SID_CODE = 1102;
  95     private static final int PEER_SET_SID_CODE = 1103;
  96     // Performance Metrics
  97     private static final int LINK_DELAY = 1114;
  98     private static final int LINK_MIN_MAX_DELAY = 1115;
  99     private static final int DELAY_VARIATION = 1116;
 100     private static final int LINK_LOSS = 1117;
 101     private static final int RESIDUAL_BANDWIDTH = 1118;
 102     private static final int AVAILABLE_BANDWIDTH = 1119;
 103     private static final int UTILIZED_BANDWIDTH = 1120;
 104
 105     private LinkAttributesParser() {
 106
 107     }
 108
 109     @FunctionalInterface
 110     private interface SerializerInterface {
 111         void check(Object cont);
 112     }
 113
 114     /**
 115      * Parse Link Attributes.
 116      *
 117      * @param attributes key is the tlv type and value is the value of the tlv
 118      * @param protocolId to differentiate parsing methods
 119      * @return {@link LinkStateAttribute}
 120      */
 121     static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes,
 122             final ProtocolId protocolId) {
 123         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
 124         final List<SrAdjIds> srAdjIds = new ArrayList<>();
 125         final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
 126         final List<PeerSetSids> peerSetSids = new ArrayList<>();
 127         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
 128             LOG.trace("Link attribute TLV {}", entry.getKey());
 129             final int key = entry.getKey();
 130             final ByteBuf value = entry.getValue();
 131             switch (key) {
 132                 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
 133                     builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 134                     LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
 135                     break;
 136                 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 137                     builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 138                     LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
 139                     break;
 140                 case REMOTE_IPV4_ROUTER_ID:
 141                     builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 142                     LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
 143                     break;
 144                 case REMOTE_IPV6_ROUTER_ID:
 145                     builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 146                     LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
 147                     break;
 148                 case ADMIN_GROUP:
 149                     builder.setAdminGroup(new AdministrativeGroup(ByteBufUtils.readUint32(value)));
 150                     LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 151                     break;
 152                 case MAX_BANDWIDTH:
 153                     builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 154                     LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 155                     break;
 156                 case MAX_RESERVABLE_BANDWIDTH:
 157                     builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 158                     LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 159                     break;
 160                 case UNRESERVED_BANDWIDTH:
 161                     parseUnreservedBandwidth(value, builder);
 162                     break;
 163                 case TE_METRIC:
 164                     builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 165                     LOG.debug("Parsed Metric {}", builder.getTeMetric());
 166                     break;
 167                 case LINK_PROTECTION_TYPE:
 168                     builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
 169                     LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
 170                     break;
 171                 case MPLS_PROTOCOL:
 172                     final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 173                     builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 174                     LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 175                     break;
 176                 case METRIC:
 177                     // length can 3, 2 or 1
 178                     builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 179                     LOG.debug("Parsed Metric {}", builder.getMetric());
 180                     break;
 181                 case SHARED_RISK_LINK_GROUP:
 182                     parseSrlg(value, builder);
 183                     break;
 184                 case LINK_OPAQUE:
 185                     LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 186                     break;
 187                 case LINK_NAME:
 188                     builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
 189                     LOG.debug("Parsed Link Name : {}", builder.getLinkName());
 190                     break;
 191                 case SR_ADJ_ID:
 192                     srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
 193                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
 194                     break;
 195                 case SR_LAN_ADJ_ID:
 196                     srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
 197                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
 198                     break;
 199                 case PEER_NODE_SID_CODE:
 200                     builder.setPeerNodeSid(new PeerNodeSidBuilder(
 201                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 202                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
 203                     break;
 204                 case PEER_ADJ_SID_CODE:
 205                     builder.setPeerAdjSid(new PeerAdjSidBuilder(
 206                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 207                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
 208                     break;
 209                 case PEER_SET_SID_CODE:
 210                     peerSetSids.add(new PeerSetSidsBuilder(
 211                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 212                     LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
 213                     break;
 214                     // Performance Metrics
 215                 case LINK_DELAY:
 216                     builder.setLinkDelay(new Delay(ByteBufUtils.readUint32(value)));
 217                     LOG.debug("Parsed Link Delay {}", builder.getLinkDelay());
 218                     break;
 219                 case LINK_MIN_MAX_DELAY:
 220                     builder.setLinkMinMaxDelay(new LinkMinMaxDelayBuilder()
 221                         .setMinDelay(new Delay(ByteBufUtils.readUint32(value)))
 222                         .setMaxDelay(new Delay(ByteBufUtils.readUint32(value)))
 223                         .build());
 224                     LOG.debug("Parsed Link Min/Max Delay {}", builder.getLinkMinMaxDelay());
 225                     break;
 226                 case DELAY_VARIATION:
 227                     builder.setDelayVariation(new Delay(ByteBufUtils.readUint32(value)));
 228                     LOG.debug("Parsed Delay Variation {}", builder.getDelayVariation());
 229                     break;
 230                 case LINK_LOSS:
 231                     builder.setLinkLoss(new Loss(ByteBufUtils.readUint32(value)));
 232                     LOG.debug("Parsed Link Loss {}", builder.getLinkLoss());
 233                     break;
 234                 case RESIDUAL_BANDWIDTH:
 235                     builder.setResidualBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 236                     LOG.debug("Parsed Residual Bandwidth {}", builder.getResidualBandwidth());
 237                     break;
 238                 case AVAILABLE_BANDWIDTH:
 239                     builder.setAvailableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 240                     LOG.debug("Parsed Available Bandwidth {}", builder.getAvailableBandwidth());
 241                     break;
 242                 case UTILIZED_BANDWIDTH:
 243                     builder.setUtilizedBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 244                     LOG.debug("Parsed Utilized Bandwidth {}", builder.getUtilizedBandwidth());
 245                     break;
 246                 default:
 247                     LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 248             }
 249         }
 250         if (!srAdjIds.isEmpty()) {
 251             builder.setSrAdjIds(srAdjIds);
 252         }
 253         if (!srLanAdjIds.isEmpty()) {
 254             builder.setSrLanAdjIds(srLanAdjIds);
 255         }
 256         if (!peerSetSids.isEmpty()) {
 257             builder.setPeerSetSids(peerSetSids);
 258         }
 259         LOG.trace("Finished parsing Link Attributes.");
 260         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 261     }
 262
 263     private static void parseUnreservedBandwidth(final ByteBuf value, final LinkAttributesBuilder builder) {
 264         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate
 265             .attribute.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 266         for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 267             final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 268             unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(
 269                 new Bandwidth(ByteArray.readAllBytes(v))).setPriority(Uint8.valueOf(i)).build());
 270         }
 271         builder.setUnreservedBandwidth(unreservedBandwidth);
 272         LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 273     }
 274
 275     private static void parseSrlg(final ByteBuf value, final LinkAttributesBuilder builder) {
 276         final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 277         while (value.isReadable()) {
 278             sharedRiskLinkGroups.add(new SrlgId(ByteBufUtils.readUint32(value)));
 279         }
 280         builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 281         LOG.debug("Parsed Shared Risk Link Groups {}", builder.getSharedRiskLinkGroups());
 282     }
 283
 284     private static void ifPresentApply(final Object tlv, final SerializerInterface serializer) {
 285         if (tlv != null) {
 286             serializer.check(tlv);
 287         }
 288     }
 289
 290
 291     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf output) {
 292         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 293         LOG.trace("Started serializing Link Attributes");
 294         ifPresentApply(linkAttributes.getLocalIpv4RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID,
 295             Ipv4Util.byteBufForAddress((Ipv4AddressNoZone) value), output));
 296         ifPresentApply(linkAttributes.getLocalIpv6RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID,
 297             Ipv6Util.byteBufForAddress((Ipv6AddressNoZone) value), output));
 298         ifPresentApply(linkAttributes.getRemoteIpv4RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID,
 299             Ipv4Util.byteBufForAddress((Ipv4AddressNoZone) value), output));
 300         ifPresentApply(linkAttributes.getRemoteIpv6RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID,
 301             Ipv6Util.byteBufForAddress((Ipv6AddressNoZone) value), output));
 302         ifPresentApply(linkAttributes.getAdminGroup(), value -> TlvUtil.writeTLV(ADMIN_GROUP,
 303             Unpooled.copyInt(((AdministrativeGroup) value).getValue().intValue()), output));
 304         ifPresentApply(linkAttributes.getMaxLinkBandwidth(), value -> TlvUtil.writeTLV(MAX_BANDWIDTH,
 305             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 306         ifPresentApply(linkAttributes.getMaxReservableBandwidth(), value -> TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH,
 307             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 308         serializeUnreservedBw(linkAttributes.getUnreservedBandwidth(), output);
 309         ifPresentApply(linkAttributes.getTeMetric(), value -> TlvUtil.writeTLV(TE_METRIC,
 310             Unpooled.copyLong(((TeMetric) value).getValue().toJava()), output));
 311         ifPresentApply(linkAttributes.getLinkProtection(), value -> TlvUtil.writeTLV(LINK_PROTECTION_TYPE,
 312             Unpooled.copyShort(((LinkProtectionType) value).getIntValue()), output));
 313         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), output);
 314         ifPresentApply(linkAttributes.getMetric(), value -> TlvUtil.writeTLV(METRIC,
 315             Unpooled.copyMedium(((Metric) value).getValue().intValue()), output));
 316         serializeSrlg(linkAttributes.getSharedRiskLinkGroups(), output);
 317         ifPresentApply(linkAttributes.getLinkName(), value -> TlvUtil.writeTLV(LINK_NAME,
 318             Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode((String) value)), output));
 319         ifPresentApply(linkAttributes.getSrAdjIds(),
 320             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<SrAdjIds>) value, SR_ADJ_ID,
 321                 output));
 322         ifPresentApply(linkAttributes.getSrLanAdjIds(),
 323             value -> SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifiers((List<SrLanAdjIds>) value, output));
 324         ifPresentApply(linkAttributes.getPeerNodeSid(), value -> TlvUtil.writeTLV(PEER_NODE_SID_CODE,
 325             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerNodeSid) value), output));
 326         ifPresentApply(linkAttributes.getPeerAdjSid(), value -> TlvUtil.writeTLV(PEER_ADJ_SID_CODE,
 327             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerAdjSid) value), output));
 328         ifPresentApply(linkAttributes.getPeerSetSids(),
 329             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<PeerSetSids>) value,
 330                 PEER_SET_SID_CODE, output));
 331         // Performance Metrics
 332         ifPresentApply(linkAttributes.getLinkDelay(), value -> TlvUtil.writeTLV(LINK_DELAY,
 333             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 334         serializeLinkMinMaxDelay(linkAttributes.getLinkMinMaxDelay(), output);
 335         ifPresentApply(linkAttributes.getDelayVariation(), value -> TlvUtil.writeTLV(DELAY_VARIATION,
 336             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 337         ifPresentApply(linkAttributes.getLinkLoss(), value -> TlvUtil.writeTLV(LINK_LOSS,
 338             Unpooled.copyInt(((Loss) value).getValue().intValue()), output));
 339         ifPresentApply(linkAttributes.getResidualBandwidth(), value -> TlvUtil.writeTLV(RESIDUAL_BANDWIDTH,
 340             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 341         ifPresentApply(linkAttributes.getAvailableBandwidth(), value -> TlvUtil.writeTLV(AVAILABLE_BANDWIDTH,
 342             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 343         ifPresentApply(linkAttributes.getUtilizedBandwidth(), value -> TlvUtil.writeTLV(UTILIZED_BANDWIDTH,
 344             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 345         LOG.trace("Finished serializing Link Attributes");
 346     }
 347
 348     private static void serializeUnreservedBw(final Map<UnreservedBandwidthKey, UnreservedBandwidth> ubList,
 349             final ByteBuf byteAggregator) {
 350         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 351         if (ubList != null) {
 352             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 353             for (final UnreservedBandwidth unreservedBandwidth : ubList.values()) {
 354                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 355             }
 356             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 357         }
 358     }
 359
 360     private static void serializeSrlg(final List<SrlgId> srlgList, final ByteBuf byteAggregator) {
 361         if (srlgList != null) {
 362             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 363             for (final SrlgId srlgId : srlgList) {
 364                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 365             }
 366             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 367         }
 368     }
 369
 370     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask,
 371             final ByteBuf byteAggregator) {
 372         if (mplsProtocolMask != null) {
 373             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 374             final BitArray mask = new BitArray(FLAGS_SIZE);
 375             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 376             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 377             mask.toByteBuf(mplsProtocolMaskBuf);
 378             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 379         }
 380     }
 381
 382     private static void serializeLinkMinMaxDelay(final LinkMinMaxDelay linkMinMaxDelay, final ByteBuf byteAggregator) {
 383         if (linkMinMaxDelay != null) {
 384             final ByteBuf linkMinMaxDelayBuf = Unpooled.buffer();
 385             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMinDelay().getValue().intValue());
 386             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMaxDelay().getValue().intValue());
 387             TlvUtil.writeTLV(LINK_MIN_MAX_DELAY, linkMinMaxDelayBuf, byteAggregator);
 388         }
 389     }
 390 }