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.opendaylight.yangtools.yang.common.Uint8;
  57 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
  58 import org.slf4j.Logger;
  59 import org.slf4j.LoggerFactory;
  60
  61 @VisibleForTesting
  62 public final class LinkAttributesParser {
  63     public static final int SR_LAN_ADJ_ID = 1100;
  64
  65     private static final Logger LOG = LoggerFactory.getLogger(LinkAttributesParser.class);
  66     private static final int UNRESERVED_BW_COUNT = 8;
  67
  68     private static final int BANDWIDTH_LENGTH = 4;
  69
  70     // MPLS protection mask bits
  71     private static final int FLAGS_SIZE = 8;
  72
  73     private static final int LDP_BIT = 0;
  74     private static final int RSVP_BIT = 1;
  75
  76     /* Link Attribute TLVs */
  77     private static final int REMOTE_IPV4_ROUTER_ID = 1030;
  78     private static final int REMOTE_IPV6_ROUTER_ID = 1031;
  79     private static final int ADMIN_GROUP = 1088;
  80     private static final int MAX_BANDWIDTH = 1089;
  81     private static final int MAX_RESERVABLE_BANDWIDTH = 1090;
  82     private static final int UNRESERVED_BANDWIDTH = 1091;
  83     private static final int TE_METRIC = 1092;
  84     private static final int LINK_PROTECTION_TYPE = 1093;
  85     private static final int MPLS_PROTOCOL = 1094;
  86     private static final int METRIC = 1095;
  87     private static final int SHARED_RISK_LINK_GROUP = 1096;
  88     private static final int LINK_OPAQUE = 1097;
  89     private static final int LINK_NAME = 1098;
  90     private static final int SR_ADJ_ID = 1099;
  91     private static final int PEER_NODE_SID_CODE = 1101;
  92     private static final int PEER_ADJ_SID_CODE = 1102;
  93     private static final int PEER_SET_SID_CODE = 1103;
  94     // Performance Metrics
  95     private static final int LINK_DELAY = 1114;
  96     private static final int LINK_MIN_MAX_DELAY = 1115;
  97     private static final int DELAY_VARIATION = 1116;
  98     private static final int LINK_LOSS = 1117;
  99     private static final int RESIDUAL_BANDWIDTH = 1118;
 100     private static final int AVAILABLE_BANDWIDTH = 1119;
 101     private static final int UTILIZED_BANDWIDTH = 1120;
 102
 103     private LinkAttributesParser() {
 104
 105     }
 106
 107     @FunctionalInterface
 108     private interface SerializerInterface {
 109         void check(Object cont);
 110     }
 111
 112     /**
 113      * Parse Link Attributes.
 114      *
 115      * @param attributes key is the tlv type and value is the value of the tlv
 116      * @param protocolId to differentiate parsing methods
 117      * @return {@link LinkStateAttribute}
 118      */
 119     static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes,
 120             final ProtocolId protocolId) {
 121         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
 122         final List<SrAdjIds> srAdjIds = new ArrayList<>();
 123         final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
 124         final List<PeerSetSids> peerSetSids = new ArrayList<>();
 125         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
 126             LOG.trace("Link attribute TLV {}", entry.getKey());
 127             final int key = entry.getKey();
 128             final ByteBuf value = entry.getValue();
 129             switch (key) {
 130                 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
 131                     builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 132                     LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
 133                     break;
 134                 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 135                     builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 136                     LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
 137                     break;
 138                 case REMOTE_IPV4_ROUTER_ID:
 139                     builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 140                     LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
 141                     break;
 142                 case REMOTE_IPV6_ROUTER_ID:
 143                     builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 144                     LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
 145                     break;
 146                 case ADMIN_GROUP:
 147                     builder.setAdminGroup(new AdministrativeGroup(ByteBufUtils.readUint32(value)));
 148                     LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 149                     break;
 150                 case MAX_BANDWIDTH:
 151                     builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 152                     LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 153                     break;
 154                 case MAX_RESERVABLE_BANDWIDTH:
 155                     builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 156                     LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 157                     break;
 158                 case UNRESERVED_BANDWIDTH:
 159                     parseUnreservedBandwidth(value, builder);
 160                     break;
 161                 case TE_METRIC:
 162                     builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 163                     LOG.debug("Parsed Metric {}", builder.getTeMetric());
 164                     break;
 165                 case LINK_PROTECTION_TYPE:
 166                     builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
 167                     LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
 168                     break;
 169                 case MPLS_PROTOCOL:
 170                     final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 171                     builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 172                     LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 173                     break;
 174                 case METRIC:
 175                     // length can 3, 2 or 1
 176                     builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 177                     LOG.debug("Parsed Metric {}", builder.getMetric());
 178                     break;
 179                 case SHARED_RISK_LINK_GROUP:
 180                     parseSrlg(value, builder);
 181                     break;
 182                 case LINK_OPAQUE:
 183                     LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 184                     break;
 185                 case LINK_NAME:
 186                     builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
 187                     LOG.debug("Parsed Link Name : {}", builder.getLinkName());
 188                     break;
 189                 case SR_ADJ_ID:
 190                     srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
 191                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
 192                     break;
 193                 case SR_LAN_ADJ_ID:
 194                     srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
 195                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
 196                     break;
 197                 case PEER_NODE_SID_CODE:
 198                     builder.setPeerNodeSid(new PeerNodeSidBuilder(
 199                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 200                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
 201                     break;
 202                 case PEER_ADJ_SID_CODE:
 203                     builder.setPeerAdjSid(new PeerAdjSidBuilder(
 204                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 205                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
 206                     break;
 207                 case PEER_SET_SID_CODE:
 208                     peerSetSids.add(new PeerSetSidsBuilder(
 209                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 210                     LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
 211                     break;
 212                     // Performance Metrics
 213                 case LINK_DELAY:
 214                     builder.setLinkDelay(new Delay(ByteBufUtils.readUint32(value)));
 215                     LOG.debug("Parsed Link Delay {}", builder.getLinkDelay());
 216                     break;
 217                 case LINK_MIN_MAX_DELAY:
 218                     builder.setLinkMinMaxDelay(new LinkMinMaxDelayBuilder()
 219                         .setMinDelay(new Delay(ByteBufUtils.readUint32(value)))
 220                         .setMaxDelay(new Delay(ByteBufUtils.readUint32(value)))
 221                         .build());
 222                     LOG.debug("Parsed Link Min/Max Delay {}", builder.getLinkMinMaxDelay());
 223                     break;
 224                 case DELAY_VARIATION:
 225                     builder.setDelayVariation(new Delay(ByteBufUtils.readUint32(value)));
 226                     LOG.debug("Parsed Delay Variation {}", builder.getDelayVariation());
 227                     break;
 228                 case LINK_LOSS:
 229                     builder.setLinkLoss(new Loss(ByteBufUtils.readUint32(value)));
 230                     LOG.debug("Parsed Link Loss {}", builder.getLinkLoss());
 231                     break;
 232                 case RESIDUAL_BANDWIDTH:
 233                     builder.setResidualBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 234                     LOG.debug("Parsed Residual Bandwidth {}", builder.getResidualBandwidth());
 235                     break;
 236                 case AVAILABLE_BANDWIDTH:
 237                     builder.setAvailableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 238                     LOG.debug("Parsed Available Bandwidth {}", builder.getAvailableBandwidth());
 239                     break;
 240                 case UTILIZED_BANDWIDTH:
 241                     builder.setUtilizedBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 242                     LOG.debug("Parsed Utilized Bandwidth {}", builder.getUtilizedBandwidth());
 243                     break;
 244                 default:
 245                     LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 246             }
 247         }
 248         if (!srAdjIds.isEmpty()) {
 249             builder.setSrAdjIds(srAdjIds);
 250         }
 251         if (!srLanAdjIds.isEmpty()) {
 252             builder.setSrLanAdjIds(srLanAdjIds);
 253         }
 254         if (!peerSetSids.isEmpty()) {
 255             builder.setPeerSetSids(peerSetSids);
 256         }
 257         LOG.trace("Finished parsing Link Attributes.");
 258         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 259     }
 260
 261     private static void parseUnreservedBandwidth(final ByteBuf value, final LinkAttributesBuilder builder) {
 262         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate
 263             .attribute.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 264         for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 265             final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 266             unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(
 267                 new Bandwidth(ByteArray.readAllBytes(v))).setPriority(Uint8.valueOf(i)).build());
 268         }
 269         builder.setUnreservedBandwidth(unreservedBandwidth);
 270         LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 271     }
 272
 273     private static void parseSrlg(final ByteBuf value, final LinkAttributesBuilder builder) {
 274         final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 275         while (value.isReadable()) {
 276             sharedRiskLinkGroups.add(new SrlgId(ByteBufUtils.readUint32(value)));
 277         }
 278         builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 279         LOG.debug("Parsed Shared Risk Link Groups {}", builder.getSharedRiskLinkGroups());
 280     }
 281
 282     private static void ifPresentApply(final Object tlv, final SerializerInterface serializer) {
 283         if (tlv != null) {
 284             serializer.check(tlv);
 285         }
 286     }
 287
 288
 289     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf output) {
 290         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 291         LOG.trace("Started serializing Link Attributes");
 292         ifPresentApply(linkAttributes.getLocalIpv4RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID,
 293             Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 294         ifPresentApply(linkAttributes.getLocalIpv6RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID,
 295             Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 296         ifPresentApply(linkAttributes.getRemoteIpv4RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID,
 297             Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 298         ifPresentApply(linkAttributes.getRemoteIpv6RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID,
 299             Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 300         ifPresentApply(linkAttributes.getAdminGroup(), value -> TlvUtil.writeTLV(ADMIN_GROUP,
 301             Unpooled.copyInt(((AdministrativeGroup) value).getValue().intValue()), output));
 302         ifPresentApply(linkAttributes.getMaxLinkBandwidth(), value -> TlvUtil.writeTLV(MAX_BANDWIDTH,
 303             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 304         ifPresentApply(linkAttributes.getMaxReservableBandwidth(), value -> TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH,
 305             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 306         serializeUnreservedBw(linkAttributes.getUnreservedBandwidth(), output);
 307         ifPresentApply(linkAttributes.getTeMetric(), value -> TlvUtil.writeTLV(TE_METRIC,
 308             Unpooled.copyLong(((TeMetric) value).getValue().toJava()), output));
 309         ifPresentApply(linkAttributes.getLinkProtection(), value -> TlvUtil.writeTLV(LINK_PROTECTION_TYPE,
 310             Unpooled.copyShort(((LinkProtectionType) value).getIntValue()), output));
 311         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), output);
 312         ifPresentApply(linkAttributes.getMetric(), value -> TlvUtil.writeTLV(METRIC,
 313             Unpooled.copyMedium(((Metric) value).getValue().intValue()), output));
 314         serializeSrlg(linkAttributes.getSharedRiskLinkGroups(), output);
 315         ifPresentApply(linkAttributes.getLinkName(), value -> TlvUtil.writeTLV(LINK_NAME,
 316             Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode((String) value)), output));
 317         ifPresentApply(linkAttributes.getSrAdjIds(),
 318             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<SrAdjIds>) value, SR_ADJ_ID,
 319                 output));
 320         ifPresentApply(linkAttributes.getSrLanAdjIds(),
 321             value -> SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifiers((List<SrLanAdjIds>) value, output));
 322         ifPresentApply(linkAttributes.getPeerNodeSid(), value -> TlvUtil.writeTLV(PEER_NODE_SID_CODE,
 323             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerNodeSid) value), output));
 324         ifPresentApply(linkAttributes.getPeerAdjSid(), value -> TlvUtil.writeTLV(PEER_ADJ_SID_CODE,
 325             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerAdjSid) value), output));
 326         ifPresentApply(linkAttributes.getPeerSetSids(),
 327             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<PeerSetSids>) value,
 328                 PEER_SET_SID_CODE, output));
 329         // Performance Metrics
 330         ifPresentApply(linkAttributes.getLinkDelay(), value -> TlvUtil.writeTLV(LINK_DELAY,
 331             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 332         serializeLinkMinMaxDelay(linkAttributes.getLinkMinMaxDelay(), output);
 333         ifPresentApply(linkAttributes.getDelayVariation(), value -> TlvUtil.writeTLV(DELAY_VARIATION,
 334             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 335         ifPresentApply(linkAttributes.getLinkLoss(), value -> TlvUtil.writeTLV(LINK_LOSS,
 336             Unpooled.copyInt(((Loss) value).getValue().intValue()), output));
 337         ifPresentApply(linkAttributes.getResidualBandwidth(), value -> TlvUtil.writeTLV(RESIDUAL_BANDWIDTH,
 338             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 339         ifPresentApply(linkAttributes.getAvailableBandwidth(), value -> TlvUtil.writeTLV(AVAILABLE_BANDWIDTH,
 340             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 341         ifPresentApply(linkAttributes.getUtilizedBandwidth(), value -> TlvUtil.writeTLV(UTILIZED_BANDWIDTH,
 342             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 343         LOG.trace("Finished serializing Link Attributes");
 344     }
 345
 346     private static void serializeUnreservedBw(final List<UnreservedBandwidth> ubList, final ByteBuf byteAggregator) {
 347         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 348         if (ubList != null) {
 349             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 350             for (final UnreservedBandwidth unreservedBandwidth : ubList) {
 351                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 352             }
 353             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 354         }
 355     }
 356
 357     private static void serializeSrlg(final List<SrlgId> srlgList, final ByteBuf byteAggregator) {
 358         if (srlgList != null) {
 359             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 360             for (final SrlgId srlgId : srlgList) {
 361                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 362             }
 363             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 364         }
 365     }
 366
 367     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask,
 368             final ByteBuf byteAggregator) {
 369         if (mplsProtocolMask != null) {
 370             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 371             final BitArray mask = new BitArray(FLAGS_SIZE);
 372             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 373             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 374             mask.toByteBuf(mplsProtocolMaskBuf);
 375             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 376         }
 377     }
 378
 379     private static void serializeLinkMinMaxDelay(final LinkMinMaxDelay linkMinMaxDelay, final ByteBuf byteAggregator) {
 380         if (linkMinMaxDelay != null) {
 381             final ByteBuf linkMinMaxDelayBuf = Unpooled.buffer();
 382             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMinDelay().getValue().intValue());
 383             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMaxDelay().getValue().intValue());
 384             TlvUtil.writeTLV(LINK_MIN_MAX_DELAY, linkMinMaxDelayBuf, byteAggregator);
 385         }
 386     }
 387 }