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

   1 package org.opendaylight.openflowplugin.openflow.md.core.translator;
   2
   3 import java.math.BigInteger;
   4 import java.util.Collections;
   5 import java.util.List;
   6 import java.util.concurrent.CopyOnWriteArrayList;
   7
   8 import org.opendaylight.openflowplugin.openflow.md.core.IMDMessageTranslator;
   9 import org.opendaylight.openflowplugin.openflow.md.core.SwitchConnectionDistinguisher;
  10 import org.opendaylight.openflowplugin.openflow.md.core.session.SessionContext;
  11 import org.opendaylight.openflowplugin.openflow.md.util.InventoryDataServiceUtil;
  12 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.PortNumberMatchEntry;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.MatchEntries;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.Cookie;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceivedBuilder;
  20 import org.opendaylight.yangtools.yang.binding.DataObject;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class PacketInTranslator implements IMDMessageTranslator<OfHeader, List<DataObject>> {
  25
  26     protected static final Logger LOG = LoggerFactory
  27             .getLogger(PacketInTranslator.class);
  28     @Override
  29     public List<DataObject> translate(SwitchConnectionDistinguisher cookie,
  30             SessionContext sc, OfHeader msg) {
  31         if(sc !=null && msg instanceof PacketInMessage) {
  32             PacketInMessage message = (PacketInMessage)msg;
  33             List<DataObject> list = new CopyOnWriteArrayList<DataObject>();
  34             LOG.info("PacketIn: InPort: {} Cookie: {} Match.type: {}",
  35                     message.getInPort(), message.getCookie(),
  36                     message.getMatch() != null ? message.getMatch().getType()
  37                                               : message.getMatch());
  38
  39            // create a packet received event builder
  40            PacketReceivedBuilder pktInBuilder = new PacketReceivedBuilder();
  41            pktInBuilder.setPayload(message.getData());
  42
  43            // get the DPID
  44            GetFeaturesOutput features = sc.getFeatures();
  45            // Make sure we actually have features, some naughty switches start sending packetIn before they send us the FeatureReply
  46            if ( features != null) {
  47                BigInteger dpid = features.getDatapathId();
  48
  49                // get the Cookie if it exists
  50                if(message.getCookie() != null) {
  51                    pktInBuilder.setCookie(new Cookie(message.getCookie().longValue()));
  52                }
  53
  54                // extract the port number
  55                Long port = null;
  56
  57                if (message.getInPort() != null) {
  58                    // this doesn't work--at least for OF1.3
  59                    port = message.getInPort().longValue();
  60                }
  61
  62                // this should work for OF1.3
  63                if (message.getMatch() != null && message.getMatch().getMatchEntries() != null) {
  64                    List<MatchEntries> entries = message.getMatch().getMatchEntries();
  65                    for (MatchEntries entry : entries) {
  66                        PortNumberMatchEntry tmp = entry.getAugmentation(PortNumberMatchEntry.class);
  67                        if (tmp != null) {
  68                            if (port == null) {
  69                                port = tmp.getPortNumber().getValue();
  70                            } else {
  71                                LOG.warn("Multiple input ports (at least {} and {})",
  72                                         port, tmp.getPortNumber().getValue());
  73                            }
  74                        }
  75                    }
  76                }
  77
  78                if (port == null) {
  79                    // no incoming port, so drop the event
  80                    LOG.warn("Received packet_in, but couldn't find an input port");
  81                    return null;
  82                }else{
  83                    LOG.info("Receive packet_in from {} on port {}", dpid, port);
  84                }
  85                pktInBuilder.setIngress(InventoryDataServiceUtil.nodeConnectorRefFromDatapathIdPortno(dpid,port));
  86                PacketReceived pktInEvent = pktInBuilder.build();
  87                list.add(pktInEvent);
  88                 return list;
  89            }
  90         }
  91         return Collections.emptyList();
  92     }
  93 }