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.openflowjava.protocol.api.util.EncodeConstants;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.StandardMatchType;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.OxmMatchType;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.grouping.Match;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.grouping.MatchBuilder;
  24
  25 /**
  26  * Deserializes ofp_match (OpenFlow v1.3) and its oxm_fields structures
  27  * @author timotej.kubas
  28  * @author michal.polkorab
  29  */
  30 public class MatchDeserializer implements OFDeserializer<Match>,
  31         DeserializerRegistryInjector {
  32
  33     private DeserializerRegistry registry;
  34
  35     @Override
  36     public Match deserialize(ByteBuf input) {
  37         if (input.readableBytes() > 0) {
  38             MatchBuilder builder = new MatchBuilder();
  39             int type = input.readUnsignedShort();
  40             int length = input.readUnsignedShort();
  41             switch (type) {
  42             case 0:
  43                 builder.setType(StandardMatchType.class);
  44                 break;
  45             case 1:
  46                 builder.setType(OxmMatchType.class);
  47                 break;
  48             default:
  49                 break;
  50             }
  51             CodeKeyMaker keyMaker = CodeKeyMakerFactory
  52                     .createMatchEntriesKeyMaker(EncodeConstants.OF13_VERSION_ID);
  53             List<MatchEntry> entries = ListDeserializer.deserializeList(EncodeConstants.OF13_VERSION_ID,
  54                     length - 2 * EncodeConstants.SIZE_OF_SHORT_IN_BYTES, input, keyMaker, registry);
  55             builder.setMatchEntry(entries);
  56             int paddingRemainder = length % EncodeConstants.PADDING;
  57             if (paddingRemainder != 0) {
  58                 input.skipBytes(EncodeConstants.PADDING - paddingRemainder);
  59             }
  60             return builder.build();
  61         }
  62         return null;
  63     }
  64
  65     @Override
  66     public void injectDeserializerRegistry(DeserializerRegistry deserializerRegistry) {
  67         this.registry = deserializerRegistry;
  68     }
  69 }