openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/OF10PacketInMessageFactory.java

   1 /* Copyright (C)2013 Pantheon Technologies, s.r.o. All rights reserved. */\r
   2 package org.opendaylight.openflowjava.protocol.impl.deserialization.factories;\r
   3 \r
   4 import io.netty.buffer.ByteBuf;\r
   5 \r
   6 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;\r
   7 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;\r
   8 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;\r
   9 \r
  10 /**\r
  11  * Translates PacketIn messages (OpenFlow v1.0)\r
  12  * @author michal.polkorab\r
  13  */\r
  14 public class OF10PacketInMessageFactory implements OFDeserializer<PacketInMessage> {\r
  15 \r
  16     private static final byte PADDING_IN_PACKET_IN_HEADER = 1;\r
  17 \r
  18     private static OF10PacketInMessageFactory instance;\r
  19     \r
  20     private OF10PacketInMessageFactory() {\r
  21         // Singleton\r
  22     }\r
  23     \r
  24     /**\r
  25      * @return singleton factory\r
  26      */\r
  27     public static synchronized OF10PacketInMessageFactory getInstance(){\r
  28         if(instance == null){\r
  29             instance = new OF10PacketInMessageFactory();\r
  30         }\r
  31         return instance;\r
  32     }\r
  33 \r
  34     @Override\r
  35     public PacketInMessage bufferToMessage(ByteBuf rawMessage, short version) {\r
  36         PacketInMessageBuilder builder = new PacketInMessageBuilder();\r
  37         builder.setVersion(version);\r
  38         builder.setXid(rawMessage.readUnsignedInt());\r
  39         builder.setBufferId(rawMessage.readUnsignedInt());\r
  40         builder.setTotalLen(rawMessage.readUnsignedShort());\r
  41         builder.setInPort(rawMessage.readUnsignedShort());\r
  42         builder.setReason(rawMessage.readUnsignedByte());\r
  43         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);\r
  44         int remainingBytes = rawMessage.readableBytes();\r
  45         if (remainingBytes > 0) {\r
  46             builder.setData(rawMessage.readBytes(remainingBytes).array());\r
  47         }\r
  48         return builder.build();\r
  49     }\r
  50 }\r