openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/PacketInMessageFactory.java

   1 /* Copyright (C)2013 Pantheon Technologies, s.r.o. All rights reserved. */
   2 package org.opendaylight.openflowjava.protocol.impl.deserialization.factories;
   3
   4 import io.netty.buffer.ByteBuf;
   5
   6 import java.math.BigInteger;
   7
   8 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
   9 import org.opendaylight.openflowjava.protocol.impl.util.MatchDeserializer;
  10 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  11 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableId;
  12 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  14
  15 /**
  16  * Translates PacketIn messages
  17  * @author michal.polkorab
  18  * @author timotej.kubas
  19  */
  20 public class PacketInMessageFactory implements OFDeserializer<PacketInMessage> {
  21
  22     private static PacketInMessageFactory instance;
  23     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  24
  25     private PacketInMessageFactory() {
  26         // Singleton
  27     }
  28
  29     /**
  30      * @return singleton factory
  31      */
  32     public static synchronized PacketInMessageFactory getInstance(){
  33         if(instance == null){
  34             instance = new PacketInMessageFactory();
  35         }
  36         return instance;
  37     }
  38
  39     @Override
  40     public PacketInMessage bufferToMessage(ByteBuf rawMessage, short version) {
  41         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  42         builder.setVersion(version);
  43         builder.setXid(rawMessage.readUnsignedInt());
  44         builder.setBufferId(rawMessage.readUnsignedInt());
  45         builder.setTotalLen(rawMessage.readUnsignedShort());
  46         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  47         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  48         byte[] cookie = new byte[Long.SIZE/Byte.SIZE];
  49         rawMessage.readBytes(cookie);
  50         builder.setCookie(new BigInteger(cookie));
  51         builder.setMatch(MatchDeserializer.createMatch(rawMessage));
  52         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  53         builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
  54         return builder.build();
  55     }
  56 }