bgp/extensions/linkstate/src/main/java/org/opendaylight/protocol/bgp/linkstate/impl/attribute/sr/BindingSidLabelParser.java

   1 /*
   2  * Copyright (c) 2015 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.sr;
   9
  10 import static org.opendaylight.yangtools.yang.common.netty.ByteBufUtils.readUint8;
  11 import static org.opendaylight.yangtools.yang.common.netty.ByteBufUtils.writeUint8;
  12
  13 import io.netty.buffer.ByteBuf;
  14 import java.util.List;
  15 import org.opendaylight.protocol.bgp.linkstate.spi.pojo.SimpleBindingSubTlvsRegistry;
  16 import org.opendaylight.protocol.util.BitArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.ProtocolId;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.SrBindingSidLabels;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.SrBindingSidLabelsBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.Weight;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.BindingSubTlvs;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.Flags;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.flags.IsisBindingFlagsCase;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.flags.IsisBindingFlagsCaseBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.flags.OspfBindingFlagsCase;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev200120.binding.sid.tlv.flags.OspfBindingFlagsCaseBuilder;
  27
  28 public final class BindingSidLabelParser {
  29     /* Flags */
  30     private static final int FLAGS_SIZE = 8;
  31     private static final int AFI = 0;
  32     private static final int MIRROR_CONTEXT = 1;
  33     private static final int MIRROR_CONTEXT_OSPF = 0;
  34     private static final int SPREAD_TLV = 2;
  35     private static final int LEAKED = 3;
  36     private static final int ATTACHED = 4;
  37
  38     /* SID Label Tlv types */
  39     private static final int RESERVED_BINDING_SID = 2;
  40
  41     private BindingSidLabelParser() {
  42
  43     }
  44
  45     public static SrBindingSidLabels parseBindingSidLabel(final ByteBuf buffer, final ProtocolId protocolId) {
  46         final SrBindingSidLabelsBuilder bindingSid = new SrBindingSidLabelsBuilder();
  47         bindingSid.setWeight(new Weight(readUint8(buffer)));
  48         final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
  49         bindingSid.setFlags(parseBindingSidFlags(flags, protocolId));
  50         buffer.skipBytes(RESERVED_BINDING_SID);
  51         bindingSid.setBindingSubTlvs(
  52             SimpleBindingSubTlvsRegistry.getInstance().parseBindingSubTlvs(buffer, protocolId));
  53         return bindingSid.build();
  54     }
  55
  56     private static Flags parseBindingSidFlags(final BitArray flags, final ProtocolId protocol) {
  57         switch (protocol) {
  58             case IsisLevel1:
  59             case IsisLevel2:
  60                 return new IsisBindingFlagsCaseBuilder().setAddressFamily(flags.get(AFI))
  61                         .setMirrorContext(flags.get(MIRROR_CONTEXT))
  62                         .setSpreadTlv(flags.get(SPREAD_TLV)).setLeakedFromLevel2(flags.get(LEAKED))
  63                         .setAttachedFlag(flags.get(ATTACHED)).build();
  64             case Ospf:
  65             case OspfV3:
  66                 return new OspfBindingFlagsCaseBuilder().setMirroring(flags.get(MIRROR_CONTEXT_OSPF)).build();
  67             default:
  68                 return null;
  69         }
  70     }
  71
  72     public static void serializeBindingSidAttributes(final Weight weight, final Flags flags,
  73             final List<BindingSubTlvs> bindingSubTlvs, final ByteBuf aggregator) {
  74         writeUint8(aggregator, weight.getValue());
  75         final BitArray bitFlags = serializeBindingSidFlags(flags);
  76         bitFlags.toByteBuf(aggregator);
  77         aggregator.writeZero(RESERVED_BINDING_SID);
  78         SimpleBindingSubTlvsRegistry.getInstance().serializeBindingSubTlvs(bindingSubTlvs, aggregator);
  79     }
  80
  81     private static BitArray serializeBindingSidFlags(final Flags flags) {
  82         final BitArray bitFlags = new BitArray(FLAGS_SIZE);
  83         if (flags instanceof IsisBindingFlagsCase) {
  84             final IsisBindingFlagsCase isisFlags = (IsisBindingFlagsCase) flags;
  85             bitFlags.set(AFI, isisFlags.getAddressFamily());
  86             bitFlags.set(MIRROR_CONTEXT, isisFlags.getMirrorContext());
  87             bitFlags.set(SPREAD_TLV, isisFlags.getSpreadTlv());
  88             bitFlags.set(LEAKED, isisFlags.getLeakedFromLevel2());
  89             bitFlags.set(ATTACHED, isisFlags.getAttachedFlag());
  90         } else if (flags instanceof OspfBindingFlagsCase) {
  91             final OspfBindingFlagsCase ospfFlags = (OspfBindingFlagsCase) flags;
  92             bitFlags.set(MIRROR_CONTEXT_OSPF, ospfFlags.getMirroring());
  93         }
  94         return bitFlags;
  95     }
  96 }