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.openflowjava.protocol.impl.util.EncodeConstants;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.Capabilities;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutputBuilder;
  20
  21 /**
  22  * Translates FeaturesReply messages
  23  * @author michal.polkorab
  24  * @author timotej.kubas
  25  */
  26 public class FeaturesReplyMessageFactory implements OFDeserializer<GetFeaturesOutput>{
  27
  28     private static final byte PADDING_IN_FEATURES_REPLY_HEADER = 2;
  29
  30     private static FeaturesReplyMessageFactory instance;
  31
  32     private FeaturesReplyMessageFactory() {
  33         // do nothing, just singleton
  34     }
  35
  36     /**
  37      * @return singleton factory
  38      */
  39     public static synchronized FeaturesReplyMessageFactory getInstance() {
  40         if (instance == null) {
  41             instance = new FeaturesReplyMessageFactory();
  42         }
  43         return instance;
  44     }
  45
  46     @Override
  47     public GetFeaturesOutput bufferToMessage(ByteBuf rawMessage, short version) {
  48         GetFeaturesOutputBuilder builder = new GetFeaturesOutputBuilder();
  49         builder.setVersion(version);
  50         builder.setXid(rawMessage.readUnsignedInt());
  51         byte[] datapathId = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
  52         rawMessage.readBytes(datapathId);
  53         builder.setDatapathId(new BigInteger(1, datapathId));
  54         builder.setBuffers(rawMessage.readUnsignedInt());
  55         builder.setTables(rawMessage.readUnsignedByte());
  56         builder.setAuxiliaryId(rawMessage.readUnsignedByte());
  57         rawMessage.skipBytes(PADDING_IN_FEATURES_REPLY_HEADER);
  58         builder.setCapabilities(createCapabilities(rawMessage.readUnsignedInt()));
  59         builder.setReserved(rawMessage.readUnsignedInt());
  60         return builder.build();
  61     }
  62
  63     private static Capabilities createCapabilities(long input) {
  64         final Boolean FLOW_STATS = (input & (1 << 0)) != 0;
  65         final Boolean TABLE_STATS = (input & (1 << 1)) != 0;
  66         final Boolean PORT_STATS = (input & (1 << 2)) != 0;
  67         final Boolean GROUP_STATS = (input & (1 << 3)) != 0;
  68         final Boolean IP_REASM = (input & (1 << 5)) != 0;
  69         final Boolean QUEUE_STATS = (input & (1 << 6)) != 0;
  70         final Boolean PORT_BLOCKED = (input & (1 << 8)) != 0;
  71         return new Capabilities(FLOW_STATS, GROUP_STATS, IP_REASM,
  72                 PORT_BLOCKED, PORT_STATS, QUEUE_STATS, TABLE_STATS);
  73     }
  74
  75 }