bgp/linkstate/src/main/java/org/opendaylight/protocol/bgp/linkstate/impl/attribute/sr/binding/sid/sub/tlvs/UnnumberedEroParser.java

   1 /*
   2  * Copyright (c) 2016 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
   9 package org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.binding.sid.sub.tlvs;
  10
  11 import com.google.common.base.Preconditions;
  12 import io.netty.buffer.ByteBuf;
  13 import io.netty.buffer.Unpooled;
  14 import org.opendaylight.protocol.bgp.linkstate.spi.BindingSubTlvsParser;
  15 import org.opendaylight.protocol.bgp.linkstate.spi.BindingSubTlvsSerializer;
  16 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
  17 import org.opendaylight.protocol.util.BitArray;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.ProtocolId;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.binding.sub.tlvs.BindingSubTlv;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.binding.sub.tlvs.binding.sub.tlv.UnnumberedInterfaceIdEroCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.binding.sub.tlvs.binding.sub.tlv.UnnumberedInterfaceIdEroCaseBuilder;
  22
  23 public final class UnnumberedEroParser implements BindingSubTlvsParser, BindingSubTlvsSerializer {
  24     private static final int UNNUMBERED_ERO = 1165;
  25
  26     @Override
  27     public BindingSubTlv parseSubTlv(final ByteBuf slice, final ProtocolId protocolId) {
  28         final UnnumberedInterfaceIdEroCase unnumbered = parseUnnumberedEroCase(slice);
  29         return new UnnumberedInterfaceIdEroCaseBuilder().setLoose(unnumbered.isLoose()).setRouterId(unnumbered.getRouterId())
  30             .setInterfaceId(unnumbered.getInterfaceId()).build();
  31     }
  32
  33     @Override
  34     public int getType() {
  35         return UNNUMBERED_ERO;
  36     }
  37
  38     @Override
  39     public void serializeSubTlv(final BindingSubTlv bindingSubTlv, final ByteBuf aggregator) {
  40         Preconditions.checkArgument(bindingSubTlv instanceof UnnumberedInterfaceIdEroCase, "Wrong BindingSubTlv instance expected", bindingSubTlv);
  41         final UnnumberedInterfaceIdEroCase unnumberedEro = (UnnumberedInterfaceIdEroCase) bindingSubTlv;
  42         TlvUtil.writeTLV(getType(), serializeUnnumberedIdEro(unnumberedEro.isLoose(), unnumberedEro.getRouterId(), unnumberedEro.getInterfaceId()), aggregator);
  43     }
  44
  45     static UnnumberedInterfaceIdEroCase parseUnnumberedEroCase(final ByteBuf buffer) {
  46         final UnnumberedInterfaceIdEroCaseBuilder builder = new UnnumberedInterfaceIdEroCaseBuilder();
  47         final BitArray flags = BitArray.valueOf(buffer, Ipv4EroParser.FLAGS_SIZE);
  48         builder.setLoose(flags.get(Ipv4EroParser.LOOSE));
  49         buffer.skipBytes(Ipv4EroParser.RESERVED_ERO);
  50         builder.setRouterId(buffer.readUnsignedInt());
  51         builder.setInterfaceId(buffer.readUnsignedInt());
  52         return builder.build();
  53     }
  54
  55     static ByteBuf serializeUnnumberedIdEro(final Boolean loose, final Long routerId, final Long interfaceId) {
  56         final ByteBuf buffer = Unpooled.buffer();
  57         Ipv4EroParser.serializeEroFlags(buffer, loose);
  58         buffer.writeInt(routerId.intValue());
  59         buffer.writeInt(interfaceId.intValue());
  60         return buffer;
  61     }
  62 }