bgp/linkstate/src/main/java/org/opendaylight/protocol/bgp/linkstate/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.attribute;
   9
  10 import com.google.common.annotations.VisibleForTesting;
  11 import com.google.common.base.Charsets;
  12 import com.google.common.collect.Multimap;
  13 import io.netty.buffer.ByteBuf;
  14 import io.netty.buffer.ByteBufUtil;
  15 import io.netty.buffer.Unpooled;
  16 import java.util.ArrayList;
  17 import java.util.Arrays;
  18 import java.util.List;
  19 import java.util.Map.Entry;
  20 import org.opendaylight.protocol.bgp.linkstate.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.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.AdministrativeGroup;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.Ipv4RouterIdentifier;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.Ipv6RouterIdentifier;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.LinkProtectionType;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.MplsProtocolMask;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrAdjId;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.SrLanAdjId;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.UnreservedBandwidth;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.UnreservedBandwidthBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.LinkStateAttribute;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.LinkAttributesCase;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.LinkAttributesCaseBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributes;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.link.attributes._case.LinkAttributesBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Bandwidth;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.Metric;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.TeMetric;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.SrlgId;
  44 import org.slf4j.Logger;
  45 import org.slf4j.LoggerFactory;
  46
  47 @VisibleForTesting
  48 public final class LinkAttributesParser {
  49
  50     private static final Logger LOG = LoggerFactory.getLogger(LinkAttributesParser.class);
  51
  52     private LinkAttributesParser() {
  53         throw new UnsupportedOperationException();
  54     }
  55
  56     private static final int UNRESERVED_BW_COUNT = 8;
  57
  58     private static final int BANDWIDTH_LENGTH = 4;
  59
  60     // MPLS protection mask bits
  61     private static final int FLAGS_SIZE = 8;
  62
  63     private static final int LDP_BIT = 0;
  64     private static final int RSVP_BIT = 1;
  65
  66     /* Link Attribute TLVs */
  67     private static final int REMOTE_IPV4_ROUTER_ID = 1030;
  68     private static final int REMOTE_IPV6_ROUTER_ID = 1031;
  69     private static final int ADMIN_GROUP = 1088;
  70     private static final int MAX_BANDWIDTH = 1089;
  71     private static final int MAX_RESERVABLE_BANDWIDTH = 1090;
  72     private static final int UNRESERVED_BANDWIDTH = 1091;
  73     private static final int TE_METRIC = 1092;
  74     private static final int LINK_PROTECTION_TYPE = 1093;
  75     private static final int MPLS_PROTOCOL = 1094;
  76     private static final int METRIC = 1095;
  77     private static final int SHARED_RISK_LINK_GROUP = 1096;
  78     private static final int LINK_OPAQUE = 1097;
  79     private static final int LINK_NAME = 1098;
  80     private static final int SR_ADJ_ID = 1099;
  81     private static final int SR_LAN_ADJ_ID = 1100;
  82
  83     /**
  84      * Parse Link Attributes.
  85      *
  86      * @param attributes key is the tlv type and value is the value of the tlv
  87      * @return {@link LinkStateAttribute}
  88      */
  89     static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes) {
  90         final LinkAttributesBuilder builder = new LinkAttributesBuilder();
  91         for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
  92             LOG.trace("Link attribute TLV {}", entry.getKey());
  93             final int key = entry.getKey();
  94             final ByteBuf value = entry.getValue();
  95             switch (key) {
  96             case TlvUtil.LOCAL_IPV4_ROUTER_ID:
  97                 final Ipv4RouterIdentifier lipv4 = new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value));
  98                 builder.setLocalIpv4RouterId(lipv4);
  99                 LOG.debug("Parsed IPv4 Router-ID of local node: {}", lipv4);
 100                 break;
 101             case TlvUtil.LOCAL_IPV6_ROUTER_ID:
 102                 final Ipv6RouterIdentifier lipv6 = new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value));
 103                 builder.setLocalIpv6RouterId(lipv6);
 104                 LOG.debug("Parsed IPv6 Router-ID of local node: {}", lipv6);
 105                 break;
 106             case REMOTE_IPV4_ROUTER_ID:
 107                 final Ipv4RouterIdentifier ripv4 = new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value));
 108                 builder.setRemoteIpv4RouterId(ripv4);
 109                 LOG.debug("Parsed IPv4 Router-ID of remote node: {}", ripv4);
 110                 break;
 111             case REMOTE_IPV6_ROUTER_ID:
 112                 final Ipv6RouterIdentifier ripv6 = new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value));
 113                 builder.setRemoteIpv6RouterId(ripv6);
 114                 LOG.debug("Parsed IPv6 Router-ID of remote node: {}", ripv6);
 115                 break;
 116             case ADMIN_GROUP:
 117                 builder.setAdminGroup(new AdministrativeGroup(value.readUnsignedInt()));
 118                 LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
 119                 break;
 120             case MAX_BANDWIDTH:
 121                 builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 122                 LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
 123                 break;
 124             case MAX_RESERVABLE_BANDWIDTH:
 125                 builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
 126                 LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
 127                 break;
 128             case UNRESERVED_BANDWIDTH:
 129                 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.link.state.UnreservedBandwidth> unreservedBandwidth = new ArrayList<>(UNRESERVED_BW_COUNT);
 130                 for (int i = 0; i < UNRESERVED_BW_COUNT; i++) {
 131                     final ByteBuf v = value.readSlice(BANDWIDTH_LENGTH);
 132                     unreservedBandwidth.add(new UnreservedBandwidthBuilder().setBandwidth(new Bandwidth(ByteArray.readAllBytes(v))).setPriority((short) i).build());
 133                 }
 134                 builder.setUnreservedBandwidth(unreservedBandwidth);
 135                 LOG.debug("Parsed Unreserved Bandwidth {}", builder.getUnreservedBandwidth());
 136                 break;
 137             case TE_METRIC:
 138                 builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 139                 LOG.debug("Parsed Metric {}", builder.getTeMetric());
 140                 break;
 141             case LINK_PROTECTION_TYPE:
 142                 final int l = value.readShort();
 143                 final LinkProtectionType lpt = LinkProtectionType.forValue(l);
 144                 if (lpt == null) {
 145                     LOG.warn("Link Protection Type not recognized: {}", l);
 146                     break;
 147                 }
 148                 builder.setLinkProtection(lpt);
 149                 LOG.debug("Parsed Link Protection Type {}", lpt);
 150                 break;
 151             case MPLS_PROTOCOL:
 152                 final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
 153                 builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
 154                 LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
 155                 break;
 156             case METRIC:
 157                 // length can 3, 2 or 1
 158                 builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
 159                 LOG.debug("Parsed Metric {}", builder.getMetric());
 160                 break;
 161             case SHARED_RISK_LINK_GROUP:
 162                 final List<SrlgId> sharedRiskLinkGroups = new ArrayList<>();
 163                 while (value.isReadable()) {
 164                     sharedRiskLinkGroups.add(new SrlgId(value.readUnsignedInt()));
 165                 }
 166                 builder.setSharedRiskLinkGroups(sharedRiskLinkGroups);
 167                 LOG.debug("Parsed Shared Risk Link Groups {}", Arrays.toString(sharedRiskLinkGroups.toArray()));
 168                 break;
 169             case LINK_OPAQUE:
 170                 LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
 171                 break;
 172             case LINK_NAME:
 173                 final String name = new String(ByteArray.readAllBytes(value), Charsets.US_ASCII);
 174                 builder.setLinkName(name);
 175                 LOG.debug("Parsed Link Name : {}", name);
 176                 break;
 177             case SR_ADJ_ID:
 178                 final SrAdjId srAdjId = SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value);
 179                 builder.setSrAdjId(srAdjId);
 180                 LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjId);
 181                 break;
 182             case SR_LAN_ADJ_ID:
 183                 final SrLanAdjId srLanAdjId = SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value);
 184                 builder.setSrLanAdjId(srLanAdjId);
 185                 LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjId);
 186                 break;
 187             default:
 188                 LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
 189             }
 190         }
 191         LOG.trace("Finished parsing Link Attributes.");
 192         return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
 193     }
 194
 195     static void serializeLinkAttributes(final LinkAttributesCase linkAttributesCase, final ByteBuf byteAggregator) {
 196         final LinkAttributes linkAttributes = linkAttributesCase.getLinkAttributes();
 197         LOG.trace("Started serializing Link Attributes");
 198         if (linkAttributes.getLocalIpv4RouterId() != null) {
 199             TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress(linkAttributes.getLocalIpv4RouterId()), byteAggregator);
 200         }
 201         if (linkAttributes.getLocalIpv6RouterId() != null) {
 202             TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress(linkAttributes.getLocalIpv6RouterId()), byteAggregator);
 203         }
 204         if (linkAttributes.getRemoteIpv4RouterId() != null) {
 205             TlvUtil.writeTLV(REMOTE_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress(linkAttributes.getRemoteIpv4RouterId()), byteAggregator);
 206         }
 207         if (linkAttributes.getRemoteIpv6RouterId() != null) {
 208             TlvUtil.writeTLV(REMOTE_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress(linkAttributes.getRemoteIpv6RouterId()), byteAggregator);
 209         }
 210         if (linkAttributes.getAdminGroup() != null) {
 211             TlvUtil.writeTLV(ADMIN_GROUP, Unpooled.copyInt(linkAttributes.getAdminGroup().getValue().intValue()), byteAggregator);
 212         }
 213         if (linkAttributes.getMaxLinkBandwidth() != null) {
 214             TlvUtil.writeTLV(MAX_BANDWIDTH, Unpooled.wrappedBuffer(linkAttributes.getMaxLinkBandwidth().getValue()), byteAggregator);
 215         }
 216         if (linkAttributes.getMaxReservableBandwidth() != null) {
 217             TlvUtil.writeTLV(MAX_RESERVABLE_BANDWIDTH, Unpooled.wrappedBuffer(linkAttributes.getMaxReservableBandwidth().getValue()), byteAggregator);
 218         }
 219         // this sub-TLV contains eight 32-bit IEEE floating point numbers
 220         final List<UnreservedBandwidth> ubList = linkAttributes.getUnreservedBandwidth();
 221         if (ubList != null) {
 222             final ByteBuf unreservedBandwithBuf = Unpooled.buffer();
 223             for (final UnreservedBandwidth unreservedBandwidth : ubList) {
 224                 unreservedBandwithBuf.writeBytes(unreservedBandwidth.getBandwidth().getValue());
 225             }
 226             TlvUtil.writeTLV(UNRESERVED_BANDWIDTH, unreservedBandwithBuf, byteAggregator);
 227         }
 228         if (linkAttributes.getTeMetric() != null) {
 229             TlvUtil.writeTLV(TE_METRIC, Unpooled.copyLong(linkAttributes.getTeMetric().getValue().longValue()), byteAggregator);
 230         }
 231         if (linkAttributes.getLinkProtection() != null) {
 232             TlvUtil.writeTLV(LINK_PROTECTION_TYPE, Unpooled.copyShort(linkAttributes.getLinkProtection().getIntValue()), byteAggregator);
 233         }
 234         serializeMplsProtocolMask(linkAttributes.getMplsProtocol(), byteAggregator);
 235         if (linkAttributes.getMetric() != null) {
 236             // size of metric can be 1,2 or 3 depending on the protocol
 237             TlvUtil.writeTLV(METRIC, Unpooled.copyMedium(linkAttributes.getMetric().getValue().intValue()), byteAggregator);
 238         }
 239         final List<SrlgId> srlgList = linkAttributes.getSharedRiskLinkGroups();
 240         if (srlgList != null) {
 241             final ByteBuf sharedRLGBuf = Unpooled.buffer();
 242             for (final SrlgId srlgId : srlgList) {
 243                 sharedRLGBuf.writeInt(srlgId.getValue().intValue());
 244             }
 245             TlvUtil.writeTLV(SHARED_RISK_LINK_GROUP, sharedRLGBuf, byteAggregator);
 246         }
 247         if (linkAttributes.getLinkName() != null) {
 248             TlvUtil.writeTLV(LINK_NAME, Unpooled.wrappedBuffer(Charsets.UTF_8.encode(linkAttributes.getLinkName())), byteAggregator);
 249         }
 250         if (linkAttributes.getSrAdjId() != null) {
 251             TlvUtil.writeTLV(SR_ADJ_ID, SrLinkAttributesParser.serializeAdjacencySegmentIdentifier(linkAttributes.getSrAdjId()), byteAggregator);
 252         }
 253         if (linkAttributes.getSrLanAdjId() != null) {
 254             TlvUtil.writeTLV(SR_LAN_ADJ_ID, SrLinkAttributesParser.serializeLanAdjacencySegmentIdentifier(linkAttributes.getSrLanAdjId()), byteAggregator);
 255         }
 256         LOG.trace("Finished serializing Link Attributes");
 257     }
 258
 259     private static void serializeMplsProtocolMask(final MplsProtocolMask mplsProtocolMask, final ByteBuf byteAggregator ) {
 260         if (mplsProtocolMask != null) {
 261             final ByteBuf mplsProtocolMaskBuf = Unpooled.buffer(1);
 262             final BitArray mask = new BitArray(FLAGS_SIZE);
 263             mask.set(LDP_BIT, mplsProtocolMask.isLdp());
 264             mask.set(RSVP_BIT, mplsProtocolMask.isRsvpte());
 265             mask.toByteBuf(mplsProtocolMaskBuf);
 266             TlvUtil.writeTLV(MPLS_PROTOCOL, mplsProtocolMaskBuf, byteAggregator);
 267         }
 268     }
 269 }