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         throw new UnsupportedOperationException();
 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, final ProtocolId protocolId) {
 118         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
 119         final List<SrAdjIds> srAdjIds = new ArrayList<>();
 120         final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
 121         final List<PeerSetSids> peerSetSids = new ArrayList<>();
 122         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
 123             LOG.trace("Link attribute TLV {}", entry.getKey());
 124             final int key = entry.getKey();
 125             final ByteBuf value = entry.getValue();
 126             switch (key) {
 127             case TlvUtil.LOCAL_IPV4_ROUTER_ID:
 128                 builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 129                 LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
 130                 break;
 131             case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 132                 builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 133                 LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
 134                 break;
 135             case REMOTE_IPV4_ROUTER_ID:
 136                 builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
 137                 LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
 138                 break;
 139             case REMOTE_IPV6_ROUTER_ID:
 140                 builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
 141                 LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
 142                 break;
 143             case ADMIN_GROUP:
 144                 builder.setAdminGroup(new AdministrativeGroup(value.readUnsignedInt()));
 145                 LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 146                 break;
 147             case MAX_BANDWIDTH:
 148                 builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 149                 LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 150                 break;
 151             case MAX_RESERVABLE_BANDWIDTH:
 152                 builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 153                 LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 154                 break;
 155             case UNRESERVED_BANDWIDTH:
 156                 parseUnreservedBandwidth(value, builder);
 157                 break;
 158             case TE_METRIC:
 159                 builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 160                 LOG.debug("Parsed Metric {}", builder.getTeMetric());
 161                 break;
 162             case LINK_PROTECTION_TYPE:
 163                 builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
 164                 LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
 165                 break;
 166             case MPLS_PROTOCOL:
 167                 final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 168                 builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 169                 LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 170                 break;
 171             case METRIC:
 172                 // length can 3, 2 or 1
 173                 builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 174                 LOG.debug("Parsed Metric {}", builder.getMetric());
 175                 break;
 176             case SHARED_RISK_LINK_GROUP:
 177                 parseSrlg(value, builder);
 178                 break;
 179             case LINK_OPAQUE:
 180                 LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 181                 break;
 182             case LINK_NAME:
 183                 builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
 184                 LOG.debug("Parsed Link Name : {}", builder.getLinkName());
 185                 break;
 186             case SR_ADJ_ID:
 187                 srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
 188                 LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
 189                 break;
 190             case SR_LAN_ADJ_ID:
 191                 srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
 192                 LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
 193                 break;
 194             case PEER_NODE_SID_CODE:
 195                 builder.setPeerNodeSid(new PeerNodeSidBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 196                 LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
 197                 break;
 198             case PEER_ADJ_SID_CODE:
 199                 builder.setPeerAdjSid(new PeerAdjSidBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 200                 LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
 201                 break;
 202             case PEER_SET_SID_CODE:
 203                 peerSetSids.add(new PeerSetSidsBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
 204                 LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
 205                 break;
 206             // Performance Metrics
 207             case LINK_DELAY:
 208                 builder.setLinkDelay(new Delay(value.readUnsignedInt()));
 209                 LOG.debug("Parsed Link Delay {}", builder.getLinkDelay());
 210                 break;
 211             case LINK_MIN_MAX_DELAY:
 212                 builder.setLinkMinMaxDelay(new LinkMinMaxDelayBuilder().setMinDelay(new Delay(value.readUnsignedInt()))
 213                         .setMaxDelay(new Delay(value.readUnsignedInt())).build());
 214                 LOG.debug("Parsed Link Min/Max Delay {}", builder.getLinkMinMaxDelay());
 215                 break;
 216             case DELAY_VARIATION:
 217                 builder.setDelayVariation(new Delay(value.readUnsignedInt()));
 218                 LOG.debug("Parsed Delay Variation {}", builder.getDelayVariation());
 219                 break;
 220             case LINK_LOSS:
 221                 builder.setLinkLoss(new Loss(value.readUnsignedInt()));
 222                 LOG.debug("Parsed Link Loss {}", builder.getLinkLoss());
 223                 break;
 224             case RESIDUAL_BANDWIDTH:
 225                 builder.setResidualBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 226                 LOG.debug("Parsed Residual Bandwidth {}", builder.getResidualBandwidth());
 227                 break;
 228             case AVAILABLE_BANDWIDTH:
 229                 builder.setAvailableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 230                 LOG.debug("Parsed Available Bandwidth {}", builder.getAvailableBandwidth());
 231                 break;
 232             case UTILIZED_BANDWIDTH:
 233                 builder.setUtilizedBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 234                 LOG.debug("Parsed Utilized Bandwidth {}", builder.getUtilizedBandwidth());
 235                 break;
 236             default:
 237                 LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 238             }
 239         }
 240         if (!srAdjIds.isEmpty()) {
 241             builder.setSrAdjIds(srAdjIds);
 242         }
 243         if (!srLanAdjIds.isEmpty()) {
 244             builder.setSrLanAdjIds(srLanAdjIds);
 245         }
 246         if (!peerSetSids.isEmpty()) {
 247             builder.setPeerSetSids(peerSetSids);
 248         }
 249         LOG.trace("Finished parsing Link Attributes.");
 250         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 251     }
 252
 253     private static void parseUnreservedBandwidth(final ByteBuf value, final LinkAttributesBuilder builder) {
 254         final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.attribute.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 255         for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 256             final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 257             unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(new Bandwidth(ByteArray.readAllBytes(v))).setPriority((short) i).build());
 258         }
 259         builder.setUnreservedBandwidth(unreservedBandwidth);
 260         LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 261     }
 262
 263     private static void parseSrlg(final ByteBuf value, final LinkAttributesBuilder builder) {
 264         final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 265         while (value.isReadable()) {
 266             sharedRiskLinkGroups.add(new SrlgId(value.readUnsignedInt()));
 267         }
 268         builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 269         LOG.debug("Parsed Shared Risk Link Groups {}", builder.getSharedRiskLinkGroups());
 270     }
 271
 272     private static void ifPresentApply(final Object tlv, final SerializerInterface serializer) {
 273         if (tlv != null) {
 274             serializer.check(tlv);
 275         }
 276     }
 277
 278
 279     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf output) {
 280         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 281         LOG.trace("Started serializing Link Attributes");
 282         ifPresentApply(linkAttributes.getLocalIpv4RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 283         ifPresentApply(linkAttributes.getLocalIpv6RouterId(), value -> TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 284         ifPresentApply(linkAttributes.getRemoteIpv4RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress((Ipv4Address) value), output));
 285         ifPresentApply(linkAttributes.getRemoteIpv6RouterId(), value -> TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress((Ipv6Address) value), output));
 286         ifPresentApply(linkAttributes.getAdminGroup(), value -> TlvUtil.writeTLV(ADMIN_GROUP, Unpooled.copyInt((((AdministrativeGroup) value).getValue()).intValue()), output));
 287         ifPresentApply(linkAttributes.getMaxLinkBandwidth(), value -> TlvUtil.writeTLV(MAX_BANDWIDTH, Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 288         ifPresentApply(linkAttributes.getMaxReservableBandwidth(), value -> TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH, Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 289         serializeUnreservedBw(linkAttributes.getUnreservedBandwidth(), output);
 290         ifPresentApply(linkAttributes.getTeMetric(), value -> TlvUtil.writeTLV(TE_METRIC, Unpooled.copyLong(((TeMetric) value).getValue()), output));
 291         ifPresentApply(linkAttributes.getLinkProtection(), value -> TlvUtil.writeTLV(LINK_PROTECTION_TYPE, Unpooled.copyShort(((LinkProtectionType) value).getIntValue()), output));
 292         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), output);
 293         ifPresentApply(linkAttributes.getMetric(), value -> TlvUtil.writeTLV(METRIC, Unpooled.copyMedium(((Metric) value).getValue().intValue()), output));
 294         serializeSrlg(linkAttributes.getSharedRiskLinkGroups(), output);
 295         ifPresentApply(linkAttributes.getLinkName(), value -> TlvUtil.writeTLV(LINK_NAME, Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode((String) value)), output));
 296         ifPresentApply(linkAttributes.getSrAdjIds(), value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<SrAdjIds>) value, SR_ADJ_ID, output));
 297         ifPresentApply(linkAttributes.getSrLanAdjIds(), value -> SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifiers((List<SrLanAdjIds>) value, output));
 298         ifPresentApply(linkAttributes.getPeerNodeSid(), value -> TlvUtil.writeTLV(PEER_NODE_SID_CODE, SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerNodeSid) value), output));
 299         ifPresentApply(linkAttributes.getPeerAdjSid(), value -> TlvUtil.writeTLV(PEER_ADJ_SID_CODE, SrLinkAttributesParser.serializeAdjacencySegmentIdentifier((PeerAdjSid) value), output));
 300         ifPresentApply(linkAttributes.getPeerSetSids(), value -> SrLinkAttributesParser.serializeAdjacencySegmentIdentifiers((List<PeerSetSids>) value, PEER_SET_SID_CODE, output));
 301         // Performance Metrics
 302         ifPresentApply(linkAttributes.getLinkDelay(), value -> TlvUtil.writeTLV(LINK_DELAY, Unpooled.copyInt((((Delay) value).getValue()).intValue()), output));
 303         serializeLinkMinMaxDelay(linkAttributes.getLinkMinMaxDelay(), output);
 304         ifPresentApply(linkAttributes.getDelayVariation(), value -> TlvUtil.writeTLV(DELAY_VARIATION, Unpooled.copyInt((((Delay) value).getValue()).intValue()), output));
 305         ifPresentApply(linkAttributes.getLinkLoss(), value -> TlvUtil.writeTLV(LINK_LOSS, Unpooled.copyInt((((Loss) value).getValue()).intValue()), output));
 306         ifPresentApply(linkAttributes.getResidualBandwidth(), value -> TlvUtil.writeTLV(RESIDUAL_BANDWIDTH, Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 307         ifPresentApply(linkAttributes.getAvailableBandwidth(), value -> TlvUtil.writeTLV(AVAILABLE_BANDWIDTH, Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 308         ifPresentApply(linkAttributes.getUtilizedBandwidth(), value -> TlvUtil.writeTLV(UTILIZED_BANDWIDTH, Unpooled.wrappedBuffer(((Bandwidth) value).getValue()), output));
 309         LOG.trace("Finished serializing Link Attributes");
 310     }
 311
 312     private static void serializeUnreservedBw(final List<UnreservedBandwidth> ubList, final ByteBuf byteAggregator) {
 313         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 314         if (ubList != null) {
 315             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 316             for (final UnreservedBandwidth unreservedBandwidth : ubList) {
 317                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 318             }
 319             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 320         }
 321     }
 322
 323     private static void serializeSrlg(final List<SrlgId> srlgList, final ByteBuf byteAggregator) {
 324         if (srlgList != null) {
 325             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 326             for (final SrlgId srlgId : srlgList) {
 327                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 328             }
 329             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 330         }
 331     }
 332
 333     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask, final ByteBuf byteAggregator) {
 334         if (mplsProtocolMask != null) {
 335             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 336             final BitArray mask = new BitArray(FLAGS_SIZE);
 337             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 338             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 339             mask.toByteBuf(mplsProtocolMaskBuf);
 340             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 341         }
 342     }
 343
 344     private static void serializeLinkMinMaxDelay(final LinkMinMaxDelay linkMinMaxDelay, final ByteBuf byteAggregator) {
 345         if (linkMinMaxDelay != null) {
 346             final ByteBuf linkMinMaxDelayBuf = Unpooled.buffer();
 347             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMinDelay().getValue().intValue());
 348             linkMinMaxDelayBuf.writeInt(linkMinMaxDelay.getMaxDelay().getValue().intValue());
 349             TlvUtil.writeTLV(LINK_MIN_MAX_DELAY, linkMinMaxDelayBuf, byteAggregator);
 350         }
 351     }
 352 }