openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/deserialization/factories/PacketInMessageFactory.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.api.extensibility.DeserializerRegistry;
  16 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
  17 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  18 import org.opendaylight.openflowjava.protocol.api.keys.MessageCodeKey;
  19 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.TableId;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.grouping.Match;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessageBuilder;
  25
  26 /**
  27  * Translates PacketIn messages
  28  * @author michal.polkorab
  29  * @author timotej.kubas
  30  */
  31 public class PacketInMessageFactory implements OFDeserializer<PacketInMessage>,
  32         DeserializerRegistryInjector {
  33
  34     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  35     private static final MessageCodeKey MATCH_KEY = new MessageCodeKey(
  36             EncodeConstants.OF13_VERSION_ID, EncodeConstants.EMPTY_VALUE, Match.class);
  37     private DeserializerRegistry registry;
  38
  39     @Override
  40     public PacketInMessage deserialize(final ByteBuf rawMessage) {
  41         PacketInMessageBuilder builder = new PacketInMessageBuilder();
  42         builder.setVersion((short) EncodeConstants.OF13_VERSION_ID);
  43         builder.setXid(rawMessage.readUnsignedInt());
  44         builder.setBufferId(rawMessage.readUnsignedInt());
  45         builder.setTotalLen(rawMessage.readUnsignedShort());
  46         builder.setReason(PacketInReason.forValue(rawMessage.readUnsignedByte()));
  47         builder.setTableId(new TableId((long)rawMessage.readUnsignedByte()));
  48         byte[] cookie = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
  49         rawMessage.readBytes(cookie);
  50         builder.setCookie(new BigInteger(1, cookie));
  51         OFDeserializer<Match> matchDeserializer = registry.getDeserializer(MATCH_KEY);
  52         builder.setMatch(matchDeserializer.deserialize(rawMessage));
  53         rawMessage.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  54         builder.setData(rawMessage.readBytes(rawMessage.readableBytes()).array());
  55         return builder.build();
  56     }
  57
  58     @Override
  59     public void injectDeserializerRegistry(final DeserializerRegistry deserializerRegistry) {
  60         registry = deserializerRegistry;
  61     }
  62 }