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.EncodeConstants;
  17 import org.opendaylight.openflowjava.protocol.impl.util.MatchDeserializer;
  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.protocol.rev130731.PacketInMessage;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  22
  23 /**
  24  * Translates PacketIn messages
  25  * @author michal.polkorab
  26  * @author timotej.kubas
  27  */
  28 public class PacketInMessageFactory implements OFDeserializer<PacketInMessage> {
  29
  30     private static PacketInMessageFactory instance;
  31     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  32
  33     private PacketInMessageFactory() {
  34         // Singleton
  35     }
  36
  37     /**
  38      * @return singleton factory
  39      */
  40     public static synchronized PacketInMessageFactory getInstance(){
  41         if(instance == null){
  42             instance = new PacketInMessageFactory();
  43         }
  44         return instance;
  45     }
  46
  47     @Override
  48     public PacketInMessage bufferToMessage(ByteBuf rawMessage, short version) {
  49         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  50         builder.setVersion(version);
  51         builder.setXid(rawMessage.readUnsignedInt());
  52         builder.setBufferId(rawMessage.readUnsignedInt());
  53         builder.setTotalLen(rawMessage.readUnsignedShort());
  54         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  55         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  56         byte[] cookie = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
  57         rawMessage.readBytes(cookie);
  58         builder.setCookie(new BigInteger(1, cookie));
  59         builder.setMatch(MatchDeserializer.createMatch(rawMessage));
  60         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  61         builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
  62         return builder.build();
  63     }
  64 }