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