openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/FeaturesReplyMessageFactory.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.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.Capabilities;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutputBuilder;
  19
  20 /**
  21  * Translates FeaturesReply messages
  22  * @author michal.polkorab
  23  * @author timotej.kubas
  24  */
  25 public class FeaturesReplyMessageFactory implements OFDeserializer<GetFeaturesOutput>{
  26
  27     private static final byte PADDING_IN_FEATURES_REPLY_HEADER = 2;
  28
  29     private static FeaturesReplyMessageFactory instance;
  30
  31     private FeaturesReplyMessageFactory() {
  32         // do nothing, just singleton
  33     }
  34
  35     /**
  36      * @return singleton factory
  37      */
  38     public static synchronized FeaturesReplyMessageFactory getInstance() {
  39         if (instance == null) {
  40             instance = new FeaturesReplyMessageFactory();
  41         }
  42         return instance;
  43     }
  44
  45     @Override
  46     public GetFeaturesOutput bufferToMessage(ByteBuf rawMessage, short version) {
  47         GetFeaturesOutputBuilder builder = new GetFeaturesOutputBuilder();
  48         builder.setVersion(version);
  49         builder.setXid(rawMessage.readUnsignedInt());
  50         byte[] datapathId = new byte[Long.SIZE/Byte.SIZE];
  51         rawMessage.readBytes(datapathId);
  52         builder.setDatapathId(new BigInteger(datapathId));
  53         builder.setBuffers(rawMessage.readUnsignedInt());
  54         builder.setTables(rawMessage.readUnsignedByte());
  55         builder.setAuxiliaryId(rawMessage.readUnsignedByte());
  56         rawMessage.skipBytes(PADDING_IN_FEATURES_REPLY_HEADER);
  57         builder.setCapabilities(createCapabilities(rawMessage.readUnsignedInt()));
  58         builder.setReserved(rawMessage.readUnsignedInt());
  59         return builder.build();
  60     }
  61
  62     private static Capabilities createCapabilities(long input) {
  63         final Boolean FLOW_STATS = (input & (1 << 0)) != 0;
  64         final Boolean TABLE_STATS = (input & (1 << 1)) != 0;
  65         final Boolean PORT_STATS = (input & (1 << 2)) != 0;
  66         final Boolean GROUP_STATS = (input & (1 << 3)) != 0;
  67         final Boolean IP_REASM = (input & (1 << 5)) != 0;
  68         final Boolean QUEUE_STATS = (input & (1 << 6)) != 0;
  69         final Boolean PORT_BLOCKED = (input & (1 << 8)) != 0;
  70         return new Capabilities(FLOW_STATS, GROUP_STATS, IP_REASM,
  71                 PORT_BLOCKED, PORT_STATS, QUEUE_STATS, TABLE_STATS);
  72     }
  73
  74 }