openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/protocol/deserialization/messages/PacketInMessageDeserializer.java

   1 /*
   2  * Copyright (c) 2017 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.openflowplugin.impl.protocol.deserialization.messages;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import java.math.BigInteger;
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistry;
  14 import org.opendaylight.openflowjava.protocol.api.extensibility.DeserializerRegistryInjector;
  15 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
  16 import org.opendaylight.openflowjava.protocol.api.keys.MessageCodeKey;
  17 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
  18 import org.opendaylight.openflowplugin.extension.api.path.MatchPath;
  19 import org.opendaylight.openflowplugin.impl.protocol.deserialization.key.MessageCodeMatchKey;
  20 import org.opendaylight.openflowplugin.impl.util.MatchUtil;
  21 import org.opendaylight.openflowplugin.impl.util.PacketInUtil;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowCookie;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.Match;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.PacketInReason;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketInMessage;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketInMessageBuilder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableId;
  28
  29 public class PacketInMessageDeserializer implements OFDeserializer<PacketInMessage>, DeserializerRegistryInjector {
  30     private static final byte PADDING_IN_PACKET_IN_HEADER = 2;
  31     private static final MessageCodeKey MATCH_KEY = new MessageCodeMatchKey(EncodeConstants.OF13_VERSION_ID,
  32             EncodeConstants.EMPTY_VALUE, Match.class,
  33             MatchPath.PACKET_IN_MESSAGE_MATCH);
  34
  35     private DeserializerRegistry registry;
  36
  37     @Override
  38     public void injectDeserializerRegistry(final DeserializerRegistry deserializerRegistry) {
  39         registry = deserializerRegistry;
  40     }
  41
  42     @Override
  43     public PacketInMessage deserialize(final ByteBuf message) {
  44         final PacketInMessageBuilder packetInMessageBuilder = new PacketInMessageBuilder()
  45                 .setVersion((short) EncodeConstants.OF13_VERSION_ID)
  46                 .setXid(message.readUnsignedInt());
  47
  48         // We are ignoring buffer id and total len as it is not specified in OpenFlowPlugin models
  49         final long bufferId = message.readUnsignedInt();
  50         final int totalLen = message.readUnsignedShort();
  51
  52         packetInMessageBuilder
  53                 .setPacketInReason(PacketInUtil
  54                         .getMdSalPacketInReason(PacketInReason
  55                                 .forValue(message.readUnsignedByte())))
  56                 .setTableId(new TableId(message.readUnsignedByte()));
  57
  58         final byte[] cookie = new byte[EncodeConstants.SIZE_OF_LONG_IN_BYTES];
  59         message.readBytes(cookie);
  60
  61         packetInMessageBuilder
  62                 .setFlowCookie(new FlowCookie(new BigInteger(1, cookie)));
  63
  64         final OFDeserializer<Match> matchDeserializer = registry.getDeserializer(MATCH_KEY);
  65
  66         packetInMessageBuilder.setMatch(MatchUtil.transformMatch(matchDeserializer.deserialize(message),
  67                 org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.packet.in.message
  68                         .Match.class));
  69
  70         message.skipBytes(PADDING_IN_PACKET_IN_HEADER);
  71         final byte[] data = new byte[message.readableBytes()];
  72         message.readBytes(data);
  73
  74         return packetInMessageBuilder
  75                 .setPayload(data)
  76                 .build();
  77     }
  78 }