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 import org.opendaylight.lispflowmapping.lisp.serializer.address.factory.LispAddressSerializerFactory;
  12 import org.opendaylight.lispflowmapping.lisp.serializer.exception.LispSerializationException;
  13 import org.opendaylight.lispflowmapping.lisp.util.AddressTypeMap;
  14 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.LispAddressFamily;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.SimpleAddress;
  16
  17 /**
  18  * Class to (de)serialize addresses that can be used in an LCAF.
  19  *
  20  * @author Lorand Jakab
  21  *
  22  */
  23 public class SimpleAddressSerializer {
  24
  25     private static final SimpleAddressSerializer INSTANCE = new SimpleAddressSerializer();
  26
  27     // Private constructor prevents instantiation from other classes
  28     protected SimpleAddressSerializer() {
  29     }
  30
  31     public static SimpleAddressSerializer getInstance() {
  32         return INSTANCE;
  33     }
  34
  35     public int getAddressSize(SimpleAddress address) {
  36         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(
  37                 AddressTypeMap.getSimpleAddressInnerType(address));
  38         return Length.AFI + serializer.getAddressSize(address);
  39     }
  40
  41     public void serialize(ByteBuffer buffer, SimpleAddress address) {
  42         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(
  43                 AddressTypeMap.getSimpleAddressInnerType(address));
  44         buffer.putShort(serializer.getAfi());
  45         serializer.serializeData(buffer, address);
  46     }
  47
  48     @SuppressWarnings("checkstyle:IllegalCatch")
  49     public SimpleAddress deserialize(ByteBuffer buffer, LispAddressSerializerContext ctx) {
  50         short afi = buffer.getShort();
  51         // AddressTypeMap indexes IPv4 and IPv6 prefixes (vs simple addresses) with the negative AFI values -1 and -2
  52         if ((afi == 1 || afi == 2) && ctx != null
  53                 && ctx.getMaskLen() != LispAddressSerializerContext.MASK_LEN_MISSING) {
  54             afi *= -1;
  55         }
  56         Class<? extends LispAddressFamily> addressType = AddressTypeMap.getAddressType(afi);
  57         LispAddressSerializer serializer = LispAddressSerializerFactory.getSerializer(addressType);
  58         if (serializer == null) {
  59             throw new LispSerializationException("Unknown AFI: " + afi);
  60         }
  61         try {
  62             return serializer.deserializeSimpleAddressData(buffer, ctx);
  63         } catch (RuntimeException e) {
  64             throw new LispSerializationException("Problem deserializing AFI " + afi + " in SimpleAddress context", e);
  65         }
  66     }
  67
  68     private interface Length {
  69         int AFI = 2;
  70     }
  71 }