mappingservice/lisp-proto/src/main/java/org/opendaylight/lispflowmapping/lisp/serializer/LocatorRecordSerializer.java

   1 /*
   2  * Copyright (c) 2014 Contextream, 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.lispflowmapping.lisp.serializer;
   9
  10 import static org.opendaylight.yangtools.yang.common.UintConversions.fromJava;
  11
  12 import java.nio.ByteBuffer;
  13
  14 import org.apache.commons.lang3.BooleanUtils;
  15 import org.opendaylight.lispflowmapping.lisp.serializer.address.LispAddressSerializer;
  16 import org.opendaylight.lispflowmapping.lisp.util.ByteUtil;
  17 import org.opendaylight.lispflowmapping.lisp.util.LispAddressStringifier;
  18 import org.opendaylight.lispflowmapping.lisp.util.NumberUtil;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.locatorrecords.LocatorRecord;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.locatorrecords.LocatorRecordBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.rloc.container.Rloc;
  22
  23 public final class LocatorRecordSerializer {
  24
  25     private static final LocatorRecordSerializer INSTANCE = new LocatorRecordSerializer();
  26
  27     // Private constructor prevents instantiation from other classes
  28     private LocatorRecordSerializer() {
  29     }
  30
  31     public static LocatorRecordSerializer getInstance() {
  32         return INSTANCE;
  33     }
  34
  35     protected LocatorRecord deserialize(ByteBuffer buffer) {
  36         LocatorRecordBuilder builder = new LocatorRecordBuilder();
  37         builder.setPriority(fromJava((short) ByteUtil.getUnsignedByte(buffer)));
  38         builder.setWeight(fromJava((short) ByteUtil.getUnsignedByte(buffer)));
  39         builder.setMulticastPriority(fromJava((short) ByteUtil.getUnsignedByte(buffer)));
  40         builder.setMulticastWeight(fromJava((short) ByteUtil.getUnsignedByte(buffer)));
  41         byte flags = (byte) buffer.getShort();
  42         builder.setLocalLocator(ByteUtil.extractBit(flags, Flags.LOCAL_LOCATOR));
  43         builder.setRlocProbed(ByteUtil.extractBit(flags, Flags.RLOC_PROBED));
  44         builder.setRouted(ByteUtil.extractBit(flags, Flags.ROUTED));
  45         Rloc rloc = LispAddressSerializer.getInstance().deserializeRloc(buffer);
  46         builder.setRloc(rloc);
  47         builder.setLocatorId(LispAddressStringifier.getString(rloc));
  48         return builder.build();
  49     }
  50
  51     public void serialize(ByteBuffer replyBuffer, LocatorRecord record) {
  52         replyBuffer.put((byte) NumberUtil.asShort(record.getPriority()));
  53         replyBuffer.put((byte) NumberUtil.asShort(record.getWeight()));
  54         replyBuffer.put((byte) NumberUtil.asShort(record.getMulticastPriority()));
  55         replyBuffer.put((byte) NumberUtil.asShort(record.getMulticastWeight()));
  56         replyBuffer.position(replyBuffer.position() + Length.UNUSED_FLAGS);
  57         replyBuffer.put((byte) (ByteUtil.boolToBit(BooleanUtils.isTrue(record.isLocalLocator()), Flags.LOCAL_LOCATOR)
  58                 | ByteUtil.boolToBit(BooleanUtils.isTrue(record.isRlocProbed()), Flags.RLOC_PROBED)
  59                 | ByteUtil.boolToBit(BooleanUtils.isTrue(record.isRouted()), Flags.ROUTED)));
  60         LispAddressSerializer.getInstance().serialize(replyBuffer, record.getRloc());
  61     }
  62
  63     public int getSerializationSize(LocatorRecord record) {
  64         return Length.HEADER_SIZE
  65                 + LispAddressSerializer.getInstance().getAddressSize(record.getRloc());
  66     }
  67
  68     private interface Flags {
  69         int LOCAL_LOCATOR = 0x04;
  70         int RLOC_PROBED = 0x02;
  71         int ROUTED = 0x01;
  72     }
  73
  74     private interface Length {
  75         int HEADER_SIZE = 6;
  76         int UNUSED_FLAGS = 1;
  77     }
  78 }