openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/util/MatchDeserializer.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. 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.openflowjava.protocol.impl.util;
  10
  11 import io.netty.buffer.ByteBuf;
  12
  13 import java.util.List;
  14
  15 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  16 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
  17 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.StandardMatchType;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.OxmMatchType;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.grouping.Match;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.grouping.MatchBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries;
  23
  24 /**
  25  * Deserializes ofp_match (OpenFlow v1.3) and its oxm_fields structures
  26  * @author timotej.kubas
  27  * @author michal.polkorab
  28  */
  29 public class MatchDeserializer implements OFDeserializer<Match>,
  30         DeserializerRegistryInjector {
  31
  32     private DeserializerRegistry registry;
  33
  34     @Override
  35     public Match deserialize(ByteBuf input) {
  36         if (input.readableBytes() > 0) {
  37             MatchBuilder builder = new MatchBuilder();
  38             int type = input.readUnsignedShort();
  39             int length = input.readUnsignedShort();
  40             switch (type) {
  41             case 0:
  42                 builder.setType(StandardMatchType.class);
  43                 break;
  44             case 1:
  45                 builder.setType(OxmMatchType.class);
  46                 break;
  47             default:
  48                 break;
  49             }
  50             CodeKeyMaker keyMaker = CodeKeyMakerFactory
  51                     .createMatchEntriesKeyMaker(EncodeConstants.OF13_VERSION_ID);
  52             List<MatchEntries> entries = ListDeserializer.deserializeList(EncodeConstants.OF13_VERSION_ID,
  53                     length - 2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES, input, keyMaker, registry);
  54             builder.setMatchEntries(entries);
  55             int paddingRemainder = length % EncodeConstants.PADDING;
  56             if (paddingRemainder != 0) {
  57                 input.skipBytes(EncodeConstants.PADDING - paddingRemainder);
  58             }
  59             return builder.build();
  60         }
  61         return null;
  62     }
  63
  64     @Override
  65     public void injectDeserializerRegistry(DeserializerRegistry deserializerRegistry) {
  66         this.registry = deserializerRegistry;
  67     }
  68 }