openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/OF10PacketInMessageFactory.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
  13 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  17
  18 /**
  19  * Translates PacketIn messages (OpenFlow v1.0)
  20  * @author michal.polkorab
  21  */
  22 public class OF10PacketInMessageFactory implements OFDeserializer<PacketInMessage> {
  23
  24     private static final byte PADDING_IN_PACKET_IN_HEADER = 1;
  25
  26     private static OF10PacketInMessageFactory instance;
  27
  28     private OF10PacketInMessageFactory() {
  29         // Singleton
  30     }
  31
  32     /**
  33      * @return singleton factory
  34      */
  35     public static synchronized OF10PacketInMessageFactory getInstance(){
  36         if(instance == null){
  37             instance = new OF10PacketInMessageFactory();
  38         }
  39         return instance;
  40     }
  41
  42     @Override
  43     public PacketInMessage bufferToMessage(ByteBuf rawMessage, short version) {
  44         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  45         builder.setVersion(version);
  46         builder.setXid(rawMessage.readUnsignedInt());
  47         builder.setBufferId(rawMessage.readUnsignedInt());
  48         builder.setTotalLen(rawMessage.readUnsignedShort());
  49         builder.setInPort(rawMessage.readUnsignedShort());
  50         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  51         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  52         int remainingBytes = rawMessage.readableBytes();
  53         if (remainingBytes > 0) {
  54             builder.setData(rawMessage.readBytes(remainingBytes).array());
  55         }
  56         return builder.build();
  57     }
  58 }