openflowjava/openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/PacketInMessageFactory.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.deserialization.factories;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import java.math.BigInteger;
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  14 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
  15 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  16 import org.opendaylight.openflowjava.protocol.api.keys.MessageCodeKey;
  17 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableId;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.grouping.Match;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  23
  24 /**
  25  * Translates PacketIn messages.
  26  *
  27  * @author michal.polkorab
  28  * @author timotej.kubas
  29  */
  30 public class PacketInMessageFactory implements OFDeserializer<PacketInMessage>,
  31         DeserializerRegistryInjector {
  32
  33     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  34     private static final MessageCodeKey MATCH_KEY = new MessageCodeKey(
  35             EncodeConstants.OF13_VERSION_ID, EncodeConstants.EMPTY_VALUE, Match.class);
  36     private DeserializerRegistry registry;
  37
  38     @Override
  39     public PacketInMessage deserialize(final ByteBuf rawMessage) {
  40         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  41         builder.setVersion((short) EncodeConstants.OF13_VERSION_ID);
  42         builder.setXid(rawMessage.readUnsignedInt());
  43         builder.setBufferId(rawMessage.readUnsignedInt());
  44         builder.setTotalLen(rawMessage.readUnsignedShort());
  45         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  46         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  47         byte[] cookie = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
  48         rawMessage.readBytes(cookie);
  49         builder.setCookie(new BigInteger(1, cookie));
  50         OFDeserializer<Match> matchDeserializer = registry.getDeserializer(MATCH_KEY);
  51         builder.setMatch(matchDeserializer.deserialize(rawMessage));
  52         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  53         byte[] data = new byte[rawMessage.readableBytes()];
  54         rawMessage.readBytes(data);
  55         builder.setData(data);
  56         return builder.build();
  57     }
  58
  59     @Override
  60     public void injectDeserializerRegistry(final DeserializerRegistry deserializerRegistry) {
  61         registry = deserializerRegistry;
  62     }
  63 }