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