pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROUnnumberedInterfaceSubobjectParser.java

   1 /*
   2  * Copyright (c) 2013 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.pcep.impl.subobject;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.BitSet;
  13
  14 import org.opendaylight.protocol.pcep.impl.object.RROSubobjectUtil;
  15 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  16 import org.opendaylight.protocol.pcep.spi.RROSubobjectParser;
  17 import org.opendaylight.protocol.pcep.spi.RROSubobjectSerializer;
  18 import org.opendaylight.protocol.util.ByteArray;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.Subobject;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.SubobjectBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.UnnumberedSubobject;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.UnnumberedCase;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.UnnumberedCaseBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.unnumbered._case.UnnumberedBuilder;
  25
  26 import com.google.common.base.Preconditions;
  27
  28 /**
  29  * Parser for {@link UnnumberedCase}
  30  */
  31 public class RROUnnumberedInterfaceSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
  32
  33         public static final int TYPE = 4;
  34
  35         private static final int FLAGS_F_LENGTH = 1;
  36         private static final int ROUTER_ID_NUMBER_LENGTH = 4;
  37         private static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  38
  39         private static final int ROUTER_ID_NUMBER_OFFSET = 2;
  40         private static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  41
  42         private static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  43
  44         private static final int LPA_F_OFFSET = 7;
  45         private static final int LPIU_F_OFFSET = 6;
  46
  47         @Override
  48         public Subobject parseSubobject(final ByteBuf buffer) throws PCEPDeserializerException {
  49                 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
  50                 if (buffer.readableBytes() != CONTENT_LENGTH) {
  51                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + "; Expected: "
  52                                         + CONTENT_LENGTH + ".");
  53                 }
  54                 final SubobjectBuilder builder = new SubobjectBuilder();
  55                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.readBytes(buffer, FLAGS_F_LENGTH));
  56                 builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
  57                 builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
  58                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  59                 buffer.readerIndex(buffer.readerIndex() + 1);
  60                 ubuilder.setRouterId(buffer.readUnsignedInt());
  61                 ubuilder.setInterfaceId(buffer.readUnsignedInt());
  62                 builder.setSubobjectType(new UnnumberedCaseBuilder().setUnnumbered(ubuilder.build()).build());
  63                 return builder.build();
  64         }
  65
  66         @Override
  67         public byte[] serializeSubobject(final Subobject subobject) {
  68                 if (!(subobject.getSubobjectType() instanceof UnnumberedCase)) {
  69                         throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  70                                         + ". Needed UnnumberedCase.");
  71                 }
  72                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  73                 final UnnumberedSubobject specObj = ((UnnumberedCase) subobject.getSubobjectType()).getUnnumbered();
  74                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  75                 flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
  76                 flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
  77                 retBytes[0] = ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH)[0];
  78                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId(), ROUTER_ID_NUMBER_LENGTH), retBytes, ROUTER_ID_NUMBER_OFFSET);
  79                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId(), INTERFACE_ID_NUMBER_LENGTH), 0, retBytes,
  80                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  81                 return RROSubobjectUtil.formatSubobject(TYPE, retBytes);
  82         }
  83 }