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.Uint32;
  59 import org.opendaylight.yangtools.yang.common.Uint8;
  60 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
  61 import org.slf4j.Logger;
  62 import org.slf4j.LoggerFactory;
  63
  64 @VisibleForTesting
  65 public final class LinkAttributesParser {
  66     public static final int SR_LAN_ADJ_ID = 1100;
  67
  68     private static final Logger LOG = LoggerFactory.getLogger(LinkAttributesParser.class);
  69     private static final int UNRESERVED_BW_COUNT = 8;
  70
  71     private static final int BANDWIDTH_LENGTH = 4;
  72
  73     // MPLS protection mask bits
  74     private static final int FLAGS_SIZE = 8;
  75
  76     private static final int LDP_BIT = 0;
  77     private static final int RSVP_BIT = 1;
  78
  79     /* Link Attribute TLVs */
  80     private static final int REMOTE_IPV4_ROUTER_ID = 1030;
  81     private static final int REMOTE_IPV6_ROUTER_ID = 1031;
  82     private static final int ADMIN_GROUP = 1088;
  83     private static final int MAX_BANDWIDTH = 1089;
  84     private static final int MAX_RESERVABLE_BANDWIDTH = 1090;
  85     private static final int UNRESERVED_BANDWIDTH = 1091;
  86     private static final int TE_METRIC = 1092;
  87     private static final int LINK_PROTECTION_TYPE = 1093;
  88     private static final int MPLS_PROTOCOL = 1094;
  89     private static final int METRIC = 1095;
  90     private static final int SHARED_RISK_LINK_GROUP = 1096;
  91     private static final int LINK_OPAQUE = 1097;
  92     private static final int LINK_NAME = 1098;
  93     private static final int SR_ADJ_ID = 1099;
  94     private static final int PEER_NODE_SID_CODE = 1101;
  95     private static final int PEER_ADJ_SID_CODE = 1102;
  96     private static final int PEER_SET_SID_CODE = 1103;
  97     // Performance Metrics
  98     private static final int LINK_DELAY = 1114;
  99     private static final int LINK_MIN_MAX_DELAY = 1115;
 100     private static final int DELAY_VARIATION = 1116;
 101     private static final int LINK_LOSS = 1117;
 102     private static final int RESIDUAL_BANDWIDTH = 1118;
 103     private static final int AVAILABLE_BANDWIDTH = 1119;
 104     private static final int UTILIZED_BANDWIDTH = 1120;
 105
 106     private LinkAttributesParser() {
 107
 108     }
 109
 110     @FunctionalInterface
 111     private interface SerializerInterface {
 112         void check(Object cont);
 113     }
 114
 115     /**
 116      * Parse Link Attributes.
 117      *
 118      * @param attributes key is the tlv type and value is the value of the tlv
 119      * @param protocolId to differentiate parsing methods
 120      * @return {@link LinkStateAttribute}
 121      */
 122     static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes,
 123             final ProtocolId protocolId) {
 124         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
 125         final List<SrAdjIds> srAdjIds = new ArrayList<>();
 126         final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
 127         final List<PeerSetSids> peerSetSids = new ArrayList<>();
 128         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
 129             LOG.trace("Link attribute TLV {}", entry.getKey());
 130             final int key = entry.getKey();
 131             final ByteBuf value = entry.getValue();
 132             switch (key) {
 133                 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
 134                     builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 135                     LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
 136                     break;
 137                 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 138                     builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 139                     LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
 140                     break;
 141                 case REMOTE_IPV4_ROUTER_ID:
 142                     builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 143                     LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
 144                     break;
 145                 case REMOTE_IPV6_ROUTER_ID:
 146                     builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 147                     LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
 148                     break;
 149                 case ADMIN_GROUP:
 150                     builder.setAdminGroup(new AdministrativeGroup(ByteBufUtils.readUint32(value)));
 151                     LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 152                     break;
 153                 case MAX_BANDWIDTH:
 154                     builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 155                     LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 156                     break;
 157                 case MAX_RESERVABLE_BANDWIDTH:
 158                     builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 159                     LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 160                     break;
 161                 case UNRESERVED_BANDWIDTH:
 162                     parseUnreservedBandwidth(value, builder);
 163                     break;
 164                 case TE_METRIC:
 165                     builder.setTeMetric(new TeMetric(ByteBufUtils.readUint32(value)));
 166                     LOG.debug("Parsed Metric {}", builder.getTeMetric());
 167                     break;
 168                 case LINK_PROTECTION_TYPE:
 169                     builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
 170                     LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
 171                     break;
 172                 case MPLS_PROTOCOL:
 173                     final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 174                     builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 175                     LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 176                     break;
 177                 case METRIC:
 178                     // length can 3, 2 or 1
 179                     builder.setMetric(new Metric(Uint32.valueOf(ByteArray.bytesToLong(ByteArray.readAllBytes(value)))));
 180                     LOG.debug("Parsed Metric {}", builder.getMetric());
 181                     break;
 182                 case SHARED_RISK_LINK_GROUP:
 183                     parseSrlg(value, builder);
 184                     break;
 185                 case LINK_OPAQUE:
 186                     LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 187                     break;
 188                 case LINK_NAME:
 189                     builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
 190                     LOG.debug("Parsed Link Name : {}", builder.getLinkName());
 191                     break;
 192                 case SR_ADJ_ID:
 193                     srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
 194                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
 195                     break;
 196                 case SR_LAN_ADJ_ID:
 197                     srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
 198                     LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
 199                     break;
 200                 case PEER_NODE_SID_CODE:
 201                     builder.setPeerNodeSid(new PeerNodeSidBuilder(
 202                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 203                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
 204                     break;
 205                 case PEER_ADJ_SID_CODE:
 206                     builder.setPeerAdjSid(new PeerAdjSidBuilder(
 207                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 208                     LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
 209                     break;
 210                 case PEER_SET_SID_CODE:
 211                     peerSetSids.add(new PeerSetSidsBuilder(
 212                         SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 213                     LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
 214                     break;
 215                     // Performance Metrics
 216                 case LINK_DELAY:
 217                     builder.setLinkDelay(new Delay(ByteBufUtils.readUint32(value)));
 218                     LOG.debug("Parsed Link Delay {}", builder.getLinkDelay());
 219                     break;
 220                 case LINK_MIN_MAX_DELAY:
 221                     builder.setLinkMinMaxDelay(new LinkMinMaxDelayBuilder()
 222                         .setMinDelay(new Delay(ByteBufUtils.readUint32(value)))
 223                         .setMaxDelay(new Delay(ByteBufUtils.readUint32(value)))
 224                         .build());
 225                     LOG.debug("Parsed Link Min/Max Delay {}", builder.getLinkMinMaxDelay());
 226                     break;
 227                 case DELAY_VARIATION:
 228                     builder.setDelayVariation(new Delay(ByteBufUtils.readUint32(value)));
 229                     LOG.debug("Parsed Delay Variation {}", builder.getDelayVariation());
 230                     break;
 231                 case LINK_LOSS:
 232                     builder.setLinkLoss(new Loss(ByteBufUtils.readUint32(value)));
 233                     LOG.debug("Parsed Link Loss {}", builder.getLinkLoss());
 234                     break;
 235                 case RESIDUAL_BANDWIDTH:
 236                     builder.setResidualBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 237                     LOG.debug("Parsed Residual Bandwidth {}", builder.getResidualBandwidth());
 238                     break;
 239                 case AVAILABLE_BANDWIDTH:
 240                     builder.setAvailableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 241                     LOG.debug("Parsed Available Bandwidth {}", builder.getAvailableBandwidth());
 242                     break;
 243                 case UTILIZED_BANDWIDTH:
 244                     builder.setUtilizedBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 245                     LOG.debug("Parsed Utilized Bandwidth {}", builder.getUtilizedBandwidth());
 246                     break;
 247                 default:
 248                     LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 249             }
 250         }
 251         if (!srAdjIds.isEmpty()) {
 252             builder.setSrAdjIds(srAdjIds);
 253         }
 254         if (!srLanAdjIds.isEmpty()) {
 255             builder.setSrLanAdjIds(srLanAdjIds);
 256         }
 257         if (!peerSetSids.isEmpty()) {
 258             builder.setPeerSetSids(peerSetSids);
 259         }
 260         LOG.trace("Finished parsing Link Attributes.");
 261         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 262     }
 263
 264     private static void parseUnreservedBandwidth(final ByteBuf value, final LinkAttributesBuilder builder) {
 265         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate
 266             .attribute.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 267         for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 268             final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 269             unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(
 270                 new Bandwidth(ByteArray.readAllBytes(v))).setPriority(Uint8.valueOf(i)).build());
 271         }
 272         builder.setUnreservedBandwidth(unreservedBandwidth);
 273         LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 274     }
 275
 276     private static void parseSrlg(final ByteBuf value, final LinkAttributesBuilder builder) {
 277         final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 278         while (value.isReadable()) {
 279             sharedRiskLinkGroups.add(new SrlgId(ByteBufUtils.readUint32(value)));
 280         }
 281         builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 282         LOG.debug("Parsed Shared Risk Link Groups {}", builder.getSharedRiskLinkGroups());
 283     }
 284
 285     private static void ifPresentApply(final Object tlv, final SerializerInterface serializer) {
 286         if (tlv != null) {
 287             serializer.check(tlv);
 288         }
 289     }
 290
 291
 292     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf output) {
 293         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 294         LOG.trace("Started serializing Link Attributes");
 295         ifPresentApply(linkAttributes.getLocalIpv4RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID,
 296             Ipv4Util.byteBufForAddress((Ipv4AddressNoZone) value), output));
 297         ifPresentApply(linkAttributes.getLocalIpv6RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID,
 298             Ipv6Util.byteBufForAddress((Ipv6AddressNoZone) value), output));
 299         ifPresentApply(linkAttributes.getRemoteIpv4RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID,
 300             Ipv4Util.byteBufForAddress((Ipv4AddressNoZone) value), output));
 301         ifPresentApply(linkAttributes.getRemoteIpv6RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID,
 302             Ipv6Util.byteBufForAddress((Ipv6AddressNoZone) value), output));
 303         ifPresentApply(linkAttributes.getAdminGroup(), value -> TlvUtil.writeTLV(ADMIN_GROUP,
 304             Unpooled.copyInt(((AdministrativeGroup) value).getValue().intValue()), output));
 305         ifPresentApply(linkAttributes.getMaxLinkBandwidth(), value -> TlvUtil.writeTLV(MAX_BANDWIDTH,
 306             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 307         ifPresentApply(linkAttributes.getMaxReservableBandwidth(), value -> TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH,
 308             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 309         serializeUnreservedBw(linkAttributes.getUnreservedBandwidth(), output);
 310         ifPresentApply(linkAttributes.getTeMetric(), value -> TlvUtil.writeTLV(TE_METRIC,
 311             Unpooled.copyLong(((TeMetric) value).getValue().toJava()), output));
 312         ifPresentApply(linkAttributes.getLinkProtection(), value -> TlvUtil.writeTLV(LINK_PROTECTION_TYPE,
 313             Unpooled.copyShort(((LinkProtectionType) value).getIntValue()), output));
 314         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), output);
 315         ifPresentApply(linkAttributes.getMetric(), value -> TlvUtil.writeTLV(METRIC,
 316             Unpooled.copyMedium(((Metric) value).getValue().intValue()), output));
 317         serializeSrlg(linkAttributes.getSharedRiskLinkGroups(), output);
 318         ifPresentApply(linkAttributes.getLinkName(), value -> TlvUtil.writeTLV(LINK_NAME,
 319             Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode((String) value)), output));
 320         ifPresentApply(linkAttributes.getSrAdjIds(),
 321             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<SrAdjIds>) value, SR_ADJ_ID,
 322                 output));
 323         ifPresentApply(linkAttributes.getSrLanAdjIds(),
 324             value -> SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifiers((List<SrLanAdjIds>) value, output));
 325         ifPresentApply(linkAttributes.getPeerNodeSid(), value -> TlvUtil.writeTLV(PEER_NODE_SID_CODE,
 326             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerNodeSid) value), output));
 327         ifPresentApply(linkAttributes.getPeerAdjSid(), value -> TlvUtil.writeTLV(PEER_ADJ_SID_CODE,
 328             SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerAdjSid) value), output));
 329         ifPresentApply(linkAttributes.getPeerSetSids(),
 330             value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<PeerSetSids>) value,
 331                 PEER_SET_SID_CODE, output));
 332         // Performance Metrics
 333         ifPresentApply(linkAttributes.getLinkDelay(), value -> TlvUtil.writeTLV(LINK_DELAY,
 334             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 335         serializeLinkMinMaxDelay(linkAttributes.getLinkMinMaxDelay(), output);
 336         ifPresentApply(linkAttributes.getDelayVariation(), value -> TlvUtil.writeTLV(DELAY_VARIATION,
 337             Unpooled.copyInt(((Delay) value).getValue().intValue()), output));
 338         ifPresentApply(linkAttributes.getLinkLoss(), value -> TlvUtil.writeTLV(LINK_LOSS,
 339             Unpooled.copyInt(((Loss) value).getValue().intValue()), output));
 340         ifPresentApply(linkAttributes.getResidualBandwidth(), value -> TlvUtil.writeTLV(RESIDUAL_BANDWIDTH,
 341             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 342         ifPresentApply(linkAttributes.getAvailableBandwidth(), value -> TlvUtil.writeTLV(AVAILABLE_BANDWIDTH,
 343             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 344         ifPresentApply(linkAttributes.getUtilizedBandwidth(), value -> TlvUtil.writeTLV(UTILIZED_BANDWIDTH,
 345             Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 346         LOG.trace("Finished serializing Link Attributes");
 347     }
 348
 349     private static void serializeUnreservedBw(final Map<UnreservedBandwidthKey, UnreservedBandwidth> ubList,
 350             final ByteBuf byteAggregator) {
 351         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 352         if (ubList != null) {
 353             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 354             for (final UnreservedBandwidth unreservedBandwidth : ubList.values()) {
 355                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 356             }
 357             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 358         }
 359     }
 360
 361     private static void serializeSrlg(final List<SrlgId> srlgList, final ByteBuf byteAggregator) {
 362         if (srlgList != null) {
 363             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 364             for (final SrlgId srlgId : srlgList) {
 365                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 366             }
 367             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 368         }
 369     }
 370
 371     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask,
 372             final ByteBuf byteAggregator) {
 373         if (mplsProtocolMask != null) {
 374             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 375             final BitArray mask = new BitArray(FLAGS_SIZE);
 376             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 377             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 378             mask.toByteBuf(mplsProtocolMaskBuf);
 379             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 380         }
 381     }
 382
 383     private static void serializeLinkMinMaxDelay(final LinkMinMaxDelay linkMinMaxDelay, final ByteBuf byteAggregator) {
 384         if (linkMinMaxDelay != null) {
 385             final ByteBuf linkMinMaxDelayBuf = Unpooled.buffer();
 386             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMinDelay().getValue().intValue());
 387             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMaxDelay().getValue().intValue());
 388             TlvUtil.writeTLV(LINK_MIN_MAX_DELAY, linkMinMaxDelayBuf, byteAggregator);
 389         }
 390     }
 391 }