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