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.Entry;
  19 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.SrLinkAttributesParser;
  20 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
  21 import org.opendaylight.protocol.util.BitArray;
  22 import org.opendaylight.protocol.util.ByteArray;
  23 import org.opendaylight.protocol.util.Ipv4Util;
  24 import org.opendaylight.protocol.util.Ipv6Util;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.AdministrativeGroup;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Delay;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Ipv4RouterIdentifier;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Ipv6RouterIdentifier;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.LinkProtectionType;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Loss;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.MplsProtocolMask;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.ProtocolId;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.LinkMinMaxDelay;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.LinkMinMaxDelayBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerAdjSid;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerAdjSidBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerNodeSid;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerNodeSidBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerSetSids;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.PeerSetSidsBuilder;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrAdjIds;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.SrLanAdjIds;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.UnreservedBandwidth;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.UnreservedBandwidthBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.LinkStateAttribute;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.LinkAttributesCase;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.LinkAttributesCaseBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributes;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributesBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Bandwidth;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Metric;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.TeMetric;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.SrlgId;
  56 import org.slf4j.Logger;
  57 import org.slf4j.LoggerFactory;
  58
  59 @VisibleForTesting
  60 public final class LinkAttributesParser {
  61
  62     public static final int SR_LAN_ADJ_ID = 1100;
  63     private static final Logger LOG = LoggerFactory.getLogger(LinkAttributesParser.class);
  64     private static final int UNRESERVED_BW_COUNT = 8;
  65
  66     private static final int BANDWIDTH_LENGTH = 4;
  67
  68     // MPLS protection mask bits
  69     private static final int FLAGS_SIZE = 8;
  70
  71     private static final int LDP_BIT = 0;
  72     private static final int RSVP_BIT = 1;
  73
  74     /* Link Attribute TLVs */
  75     private static final int REMOTE_IPV4_ROUTER_ID = 1030;
  76     private static final int REMOTE_IPV6_ROUTER_ID = 1031;
  77     private static final int ADMIN_GROUP = 1088;
  78     private static final int MAX_BANDWIDTH = 1089;
  79     private static final int MAX_RESERVABLE_BANDWIDTH = 1090;
  80     private static final int UNRESERVED_BANDWIDTH = 1091;
  81     private static final int TE_METRIC = 1092;
  82     private static final int LINK_PROTECTION_TYPE = 1093;
  83     private static final int MPLS_PROTOCOL = 1094;
  84     private static final int METRIC = 1095;
  85     private static final int SHARED_RISK_LINK_GROUP = 1096;
  86     private static final int LINK_OPAQUE = 1097;
  87     private static final int LINK_NAME = 1098;
  88     private static final int SR_ADJ_ID = 1099;
  89     private static final int PEER_NODE_SID_CODE = 1101;
  90     private static final int PEER_ADJ_SID_CODE = 1102;
  91     private static final int PEER_SET_SID_CODE = 1103;
  92     // Performance Metrics
  93     private static final int LINK_DELAY = 1114;
  94     private static final int LINK_MIN_MAX_DELAY = 1115;
  95     private static final int DELAY_VARIATION = 1116;
  96     private static final int LINK_LOSS = 1117;
  97     private static final int RESIDUAL_BANDWIDTH = 1118;
  98     private static final int AVAILABLE_BANDWIDTH = 1119;
  99     private static final int UTILIZED_BANDWIDTH = 1120;
 100
 101     private LinkAttributesParser() {
 102
 103     }
 104
 105     @FunctionalInterface
 106     private interface SerializerInterface {
 107         void check(Object cont);
 108     }
 109
 110     /**
 111      * Parse Link Attributes.
 112      *
 113      * @param attributes key is the tlv type and value is the value of the tlv
 114      * @param protocolId to differentiate parsing methods
 115      * @return {@link LinkStateAttribute}
 116      */
 117     static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes,
 118             final ProtocolId protocolId) {
 119         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
 120         final List<SrAdjIds> srAdjIds = new ArrayList<>();
 121         final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
 122         final List<PeerSetSids> peerSetSids = new ArrayList<>();
 123         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
 124             LOG.trace("Link attribute TLV {}", entry.getKey());
 125             final int key = entry.getKey();
 126             final ByteBuf value = entry.getValue();
 127             switch (key) {
 128                 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
 129                     builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 130                     LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
 131                     break;
 132                 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 133                     builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 134                     LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
 135                     break;
 136                 case REMOTE_IPV4_ROUTER_ID:
 137                     builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 138                     LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
 139                     break;
 140                 case REMOTE_IPV6_ROUTER_ID:
 141                     builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 142                     LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
 143                     break;
 144                 case ADMIN_GROUP:
 145                     builder.setAdminGroup(new AdministrativeGroup(value.readUnsignedInt()));
 146                     LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 147                     break;
 148                 case MAX_BANDWIDTH:
 149                     builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 150                     LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 151                     break;
 152                 case MAX_RESERVABLE_BANDWIDTH:
 153                     builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 154                     LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 155                     break;
 156                 case UNRESERVED_BANDWIDTH:
 157                     parseUnreservedBandwidth(value, builder);
 158                     break;
 159                 case TE_METRIC:
 160                     builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 161                     LOG.debug("Parsed Metric {}", builder.getTeMetric());
 162                     break;
 163                 case LINK_PROTECTION_TYPE:
 164                     builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
 165                     LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
 166                     break;
 167                 case MPLS_PROTOCOL:
 168                     final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 169                     builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 170                     LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 171                     break;
 172                 case METRIC:
 173                     // length can 3, 2 or 1
 174                     builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 175                     LOG.debug("Parsed Metric {}", builder.getMetric());
 176                     break;
 177                 case SHARED_RISK_LINK_GROUP:
 178                     parseSrlg(value, builder);
 179                     break;
 180                 case LINK_OPAQUE:
 181                     LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 182                     break;
 183                 case LINK_NAME:
 184                     builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
 185                     LOG.debug("Parsed Link Name : {}", builder.getLinkName());
 186                     break;
 187                 case SR_ADJ_ID:
 188                     srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
 189                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
 190                     break;
 191                 case SR_LAN_ADJ_ID:
 192                     srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
 193                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
 194                     break;
 195                 case PEER_NODE_SID_CODE:
 196                     builder.setPeerNodeSid(new PeerNodeSidBuilder(
 197                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 198                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
 199                     break;
 200                 case PEER_ADJ_SID_CODE:
 201                     builder.setPeerAdjSid(new PeerAdjSidBuilder(
 202                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 203                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
 204                     break;
 205                 case PEER_SET_SID_CODE:
 206                     peerSetSids.add(new PeerSetSidsBuilder(
 207                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 208                     LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
 209                     break;
 210                     // Performance Metrics
 211                 case LINK_DELAY:
 212                     builder.setLinkDelay(new Delay(value.readUnsignedInt()));
 213                     LOG.debug("Parsed Link Delay {}", builder.getLinkDelay());
 214                     break;
 215                 case LINK_MIN_MAX_DELAY:
 216                     builder.setLinkMinMaxDelay(new LinkMinMaxDelayBuilder()
 217                         .setMinDelay(new Delay(value.readUnsignedInt()))
 218                         .setMaxDelay(new Delay(value.readUnsignedInt())).build());
 219                     LOG.debug("Parsed Link Min/Max Delay {}", builder.getLinkMinMaxDelay());
 220                     break;
 221                 case DELAY_VARIATION:
 222                     builder.setDelayVariation(new Delay(value.readUnsignedInt()));
 223                     LOG.debug("Parsed Delay Variation {}", builder.getDelayVariation());
 224                     break;
 225                 case LINK_LOSS:
 226                     builder.setLinkLoss(new Loss(value.readUnsignedInt()));
 227                     LOG.debug("Parsed Link Loss {}", builder.getLinkLoss());
 228                     break;
 229                 case RESIDUAL_BANDWIDTH:
 230                     builder.setResidualBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 231                     LOG.debug("Parsed Residual Bandwidth {}", builder.getResidualBandwidth());
 232                     break;
 233                 case AVAILABLE_BANDWIDTH:
 234                     builder.setAvailableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 235                     LOG.debug("Parsed Available Bandwidth {}", builder.getAvailableBandwidth());
 236                     break;
 237                 case UTILIZED_BANDWIDTH:
 238                     builder.setUtilizedBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 239                     LOG.debug("Parsed Utilized Bandwidth {}", builder.getUtilizedBandwidth());
 240                     break;
 241                 default:
 242                     LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 243             }
 244         }
 245         if (!srAdjIds.isEmpty()) {
 246             builder.setSrAdjIds(srAdjIds);
 247         }
 248         if (!srLanAdjIds.isEmpty()) {
 249             builder.setSrLanAdjIds(srLanAdjIds);
 250         }
 251         if (!peerSetSids.isEmpty()) {
 252             builder.setPeerSetSids(peerSetSids);
 253         }
 254         LOG.trace("Finished parsing Link Attributes.");
 255         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 256     }
 257
 258     private static void parseUnreservedBandwidth(final ByteBuf value, final LinkAttributesBuilder builder) {
 259         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate
 260             .attribute.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 261         for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 262             final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 263             unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(
 264                 new Bandwidth(ByteArray.readAllBytes(v))).setPriority((short) i).build());
 265         }
 266         builder.setUnreservedBandwidth(unreservedBandwidth);
 267         LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 268     }
 269
 270     private static void parseSrlg(final ByteBuf value, final LinkAttributesBuilder builder) {
 271         final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 272         while (value.isReadable()) {
 273             sharedRiskLinkGroups.add(new SrlgId(value.readUnsignedInt()));
 274         }
 275         builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 276         LOG.debug("Parsed Shared Risk Link Groups {}", builder.getSharedRiskLinkGroups());
 277     }
 278
 279     private static void ifPresentApply(final Object tlv, final SerializerInterface serializer) {
 280         if (tlv != null) {
 281             serializer.check(tlv);
 282         }
 283     }
 284
 285
 286     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf output) {
 287         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 288         LOG.trace("Started serializing Link Attributes");
 289         ifPresentApply(linkAttributes.getLocalIpv4RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID,
 290             Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 291         ifPresentApply(linkAttributes.getLocalIpv6RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID,
 292             Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 293         ifPresentApply(linkAttributes.getRemoteIpv4RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID,
 294             Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 295         ifPresentApply(linkAttributes.getRemoteIpv6RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID,
 296             Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 297         ifPresentApply(linkAttributes.getAdminGroup(), value -> TlvUtil.writeTLV(ADMIN_GROUP,
 298             Unpooled.copyInt(((AdministrativeGroup) value).getValue().intValue()), output));
 299         ifPresentApply(linkAttributes.getMaxLinkBandwidth(), value -> TlvUtil.writeTLV(MAX_BANDWIDTH,
 300             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 301         ifPresentApply(linkAttributes.getMaxReservableBandwidth(), value -> TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH,
 302             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 303         serializeUnreservedBw(linkAttributes.getUnreservedBandwidth(), output);
 304         ifPresentApply(linkAttributes.getTeMetric(), value -> TlvUtil.writeTLV(TE_METRIC,
 305             Unpooled.copyLong(((TeMetric) value).getValue()), output));
 306         ifPresentApply(linkAttributes.getLinkProtection(), value -> TlvUtil.writeTLV(LINK_PROTECTION_TYPE,
 307             Unpooled.copyShort(((LinkProtectionType) value).getIntValue()), output));
 308         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), output);
 309         ifPresentApply(linkAttributes.getMetric(), value -> TlvUtil.writeTLV(METRIC,
 310             Unpooled.copyMedium(((Metric) value).getValue().intValue()), output));
 311         serializeSrlg(linkAttributes.getSharedRiskLinkGroups(), output);
 312         ifPresentApply(linkAttributes.getLinkName(), value -> TlvUtil.writeTLV(LINK_NAME,
 313             Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode((String) value)), output));
 314         ifPresentApply(linkAttributes.getSrAdjIds(),
 315             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<SrAdjIds>) value, SR_ADJ_ID,
 316                 output));
 317         ifPresentApply(linkAttributes.getSrLanAdjIds(),
 318             value -> SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifiers((List<SrLanAdjIds>) value, output));
 319         ifPresentApply(linkAttributes.getPeerNodeSid(), value -> TlvUtil.writeTLV(PEER_NODE_SID_CODE,
 320             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerNodeSid) value), output));
 321         ifPresentApply(linkAttributes.getPeerAdjSid(), value -> TlvUtil.writeTLV(PEER_ADJ_SID_CODE,
 322             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerAdjSid) value), output));
 323         ifPresentApply(linkAttributes.getPeerSetSids(),
 324             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<PeerSetSids>) value,
 325                 PEER_SET_SID_CODE, output));
 326         // Performance Metrics
 327         ifPresentApply(linkAttributes.getLinkDelay(), value -> TlvUtil.writeTLV(LINK_DELAY,
 328             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 329         serializeLinkMinMaxDelay(linkAttributes.getLinkMinMaxDelay(), output);
 330         ifPresentApply(linkAttributes.getDelayVariation(), value -> TlvUtil.writeTLV(DELAY_VARIATION,
 331             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 332         ifPresentApply(linkAttributes.getLinkLoss(), value -> TlvUtil.writeTLV(LINK_LOSS,
 333             Unpooled.copyInt(((Loss) value).getValue().intValue()), output));
 334         ifPresentApply(linkAttributes.getResidualBandwidth(), value -> TlvUtil.writeTLV(RESIDUAL_BANDWIDTH,
 335             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 336         ifPresentApply(linkAttributes.getAvailableBandwidth(), value -> TlvUtil.writeTLV(AVAILABLE_BANDWIDTH,
 337             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 338         ifPresentApply(linkAttributes.getUtilizedBandwidth(), value -> TlvUtil.writeTLV(UTILIZED_BANDWIDTH,
 339             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 340         LOG.trace("Finished serializing Link Attributes");
 341     }
 342
 343     private static void serializeUnreservedBw(final List<UnreservedBandwidth> ubList, final ByteBuf byteAggregator) {
 344         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 345         if (ubList != null) {
 346             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 347             for (final UnreservedBandwidth unreservedBandwidth : ubList) {
 348                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 349             }
 350             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 351         }
 352     }
 353
 354     private static void serializeSrlg(final List<SrlgId> srlgList, final ByteBuf byteAggregator) {
 355         if (srlgList != null) {
 356             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 357             for (final SrlgId srlgId : srlgList) {
 358                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 359             }
 360             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 361         }
 362     }
 363
 364     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask,
 365             final ByteBuf byteAggregator) {
 366         if (mplsProtocolMask != null) {
 367             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 368             final BitArray mask = new BitArray(FLAGS_SIZE);
 369             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 370             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 371             mask.toByteBuf(mplsProtocolMaskBuf);
 372             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 373         }
 374     }
 375
 376     private static void serializeLinkMinMaxDelay(final LinkMinMaxDelay linkMinMaxDelay, final ByteBuf byteAggregator) {
 377         if (linkMinMaxDelay != null) {
 378             final ByteBuf linkMinMaxDelayBuf = Unpooled.buffer();
 379             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMinDelay().getValue().intValue());
 380             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMaxDelay().getValue().intValue());
 381             TlvUtil.writeTLV(LINK_MIN_MAX_DELAY, linkMinMaxDelayBuf, byteAggregator);
 382         }
 383     }
 384 }