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 import org.slf4j.Logger;
  14 import org.slf4j.LoggerFactory;
  15
  16 /**
  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 static final Logger LOGGER = LoggerFactory
  26             .getLogger(PacketInMessageFactory.class);
  27
  28     private PacketInMessageFactory() {
  29         // Singleton
  30     }
  31
  32     /**
  33      * @return singleton factory
  34      */
  35     public static synchronized PacketInMessageFactory getInstance(){
  36         if(instance == null){
  37             instance = new PacketInMessageFactory();
  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.setReason(rawMessage.readUnsignedByte());
  50         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  51         byte[] cookie = new byte[Long.SIZE/Byte.SIZE];
  52         rawMessage.readBytes(cookie);
  53         builder.setCookie(new BigInteger(cookie));
  54         builder.setMatch(MatchDeserializer.createMatch(rawMessage));
  55         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  56         LOGGER.info("readablebytes: " + rawMessage.readableBytes());
  57         builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
  58         return builder.build();
  59     }
  60 }