openflowplugin/src/main/java/org/opendaylight/openflowplugin/openflow/md/core/translator/PacketInV10Translator.java

   1 /**
   2  * Copyright (c) 2013 Cisco Systems, Inc. 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 package org.opendaylight.openflowplugin.openflow.md.core.translator;
   9
  10 import java.math.BigInteger;
  11 import java.util.Collections;
  12 import java.util.List;
  13 import java.util.concurrent.CopyOnWriteArrayList;
  14
  15 import org.opendaylight.openflowplugin.openflow.md.core.IMDMessageTranslator;
  16 import org.opendaylight.openflowplugin.openflow.md.core.SwitchConnectionDistinguisher;
  17 import org.opendaylight.openflowplugin.openflow.md.core.session.SessionContext;
  18 import org.opendaylight.openflowplugin.openflow.md.util.InventoryDataServiceUtil;
  19 import org.opendaylight.openflowplugin.openflow.md.util.PacketInUtil;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceivedBuilder;
  25 import org.opendaylight.yangtools.yang.binding.DataObject;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * translates packetIn from OF-API model to MD-SAL model, supports OF-1.0
  31  */
  32 public class PacketInV10Translator implements IMDMessageTranslator<OfHeader, List<DataObject>> {
  33
  34     protected static final Logger LOG = LoggerFactory
  35             .getLogger(PacketInV10Translator.class);
  36     @Override
  37     public List<DataObject> translate(SwitchConnectionDistinguisher cookie,
  38             SessionContext sc, OfHeader msg) {
  39
  40         List<DataObject> salPacketIn = Collections.emptyList();
  41
  42         if (sc != null && msg instanceof PacketInMessage) {
  43             PacketInMessage message = (PacketInMessage)msg;
  44             LOG.trace("PacketIn[v{}]: InPort: {}",
  45                     msg.getVersion(), message.getInPort());
  46
  47             // create a packet received event builder
  48             PacketReceivedBuilder pktInBuilder = new PacketReceivedBuilder();
  49             pktInBuilder.setPayload(message.getData());
  50
  51             // get the DPID
  52             GetFeaturesOutput features = sc.getFeatures();
  53             // Make sure we actually have features, some naughty switches start sending packetIn before they send us the FeatureReply
  54             if ( features == null) {
  55                 LOG.warn("Received packet_in, but there is no device datapathId received yet");
  56             } else {
  57                 BigInteger dpid = features.getDatapathId();
  58
  59                 // extract the port number
  60                 Long port = null;
  61                 if (message.getInPort() != null) {
  62                     port = message.getInPort().longValue();
  63                 }
  64
  65                 if (port == null) {
  66                     // no incoming port, so drop the event
  67                     LOG.warn("Received packet_in, but couldn't find an input port");
  68                 } else {
  69                     LOG.trace("Received packet_in from {} on port {}", dpid, port);
  70                     pktInBuilder.setPacketInReason(PacketInUtil.getMdSalPacketInReason(message.getReason()));
  71                     pktInBuilder.setIngress(InventoryDataServiceUtil.nodeConnectorRefFromDatapathIdPortno(dpid, port));
  72                     PacketReceived pktInEvent = pktInBuilder.build();
  73                     salPacketIn = new CopyOnWriteArrayList<DataObject>();
  74                     salPacketIn.add(pktInEvent);
  75                 }
  76             }
  77         }
  78         return salPacketIn;
  79     }
  80 }