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

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc.  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.address;
   9
  10 import java.nio.ByteBuffer;
  11
  12 import org.opendaylight.lispflowmapping.lisp.serializer.address.factory.LispAddressSerializerFactory;
  13 import org.opendaylight.lispflowmapping.lisp.serializer.exception.LispSerializationException;
  14 import org.opendaylight.lispflowmapping.lisp.util.AddressTypeMap;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.LispAddressFamily;
  16 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.SimpleAddress;
  17
  18 /**
  19  * @author Lorand Jakab
  20  *
  21  */
  22 public class SimpleAddressSerializer {
  23
  24     private static final SimpleAddressSerializer INSTANCE = new SimpleAddressSerializer();
  25
  26     // Private constructor prevents instantiation from other classes
  27     protected SimpleAddressSerializer() {
  28     }
  29
  30     public static SimpleAddressSerializer getInstance() {
  31         return INSTANCE;
  32     }
  33
  34     public int getAddressSize(SimpleAddress address) {
  35         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(
  36                 AddressTypeMap.getSimpleAddressInnerType(address));
  37         return Length.AFI + serializer.getAddressSize(address);
  38     }
  39
  40     public void serialize(ByteBuffer buffer, SimpleAddress address) {
  41         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(
  42                 AddressTypeMap.getSimpleAddressInnerType(address));
  43         buffer.putShort(serializer.getAfi());
  44         serializer.serializeData(buffer, address);
  45     }
  46
  47     public SimpleAddress deserialize(ByteBuffer buffer, LispAddressSerializerContext ctx) {
  48         short afi = buffer.getShort();
  49         // AddressTypeMap indexes IPv4 and IPv6 prefixes (vs simple addresses) with the negative AFI values -1 and -2
  50         if ((afi == 1 || afi == 2) && ctx != null &&
  51                 ctx.getMaskLen() != LispAddressSerializerContext.MASK_LEN_MISSING) {
  52             afi *= -1;
  53         }
  54         Class <? extends LispAddressFamily> addressType = AddressTypeMap.getAddressType(afi);
  55         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(addressType);
  56         if (serializer == null) {
  57             throw new LispSerializationException("Unknown AFI: " + afi);
  58         }
  59         try {
  60             return serializer.deserializeSimpleAddressData(buffer, ctx);
  61         } catch (RuntimeException e) {
  62             throw new LispSerializationException("Problem deserializing AFI " + afi + " in SimpleAddress context", e);
  63         }
  64     }
  65
  66     private interface Length {
  67         int AFI = 2;
  68     }
  69 }