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
  13 import java.math.BigInteger;
  14
  15 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
  16 import org.opendaylight.openflowjava.protocol.impl.util.MatchDeserializer;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableId;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  21
  22 /**
  23  * Translates PacketIn messages
  24  * @author michal.polkorab
  25  * @author timotej.kubas
  26  */
  27 public class PacketInMessageFactory implements OFDeserializer<PacketInMessage> {
  28
  29     private static PacketInMessageFactory instance;
  30     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  31
  32     private PacketInMessageFactory() {
  33         // Singleton
  34     }
  35
  36     /**
  37      * @return singleton factory
  38      */
  39     public static synchronized PacketInMessageFactory getInstance(){
  40         if(instance == null){
  41             instance = new PacketInMessageFactory();
  42         }
  43         return instance;
  44     }
  45
  46     @Override
  47     public PacketInMessage bufferToMessage(ByteBuf rawMessage, short version) {
  48         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  49         builder.setVersion(version);
  50         builder.setXid(rawMessage.readUnsignedInt());
  51         builder.setBufferId(rawMessage.readUnsignedInt());
  52         builder.setTotalLen(rawMessage.readUnsignedShort());
  53         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  54         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  55         byte[] cookie = new byte[Long.SIZE/Byte.SIZE];
  56         rawMessage.readBytes(cookie);
  57         builder.setCookie(new BigInteger(cookie));
  58         builder.setMatch(MatchDeserializer.createMatch(rawMessage));
  59         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  60         builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
  61         return builder.build();
  62     }
  63 }