openflowplugin/src/main/java/org/opendaylight/openflowplugin/openflow/md/core/translator/PacketInTranslator.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.sal.convertor.match.MatchConvertorImpl;
  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.flow.types.rev131026.FlowCookie;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.Match;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.PortNumberMatchEntry;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.ConnectionCookie;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceivedBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.packet.received.MatchBuilder;
  31 import org.opendaylight.yangtools.yang.binding.DataObject;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 /**
  36  * translates packetIn from OF-API model to MD-SAL model, supports OF-1.3
  37  */
  38 public class PacketInTranslator implements IMDMessageTranslator<OfHeader, List<DataObject>> {
  39
  40     protected static final Logger LOG = LoggerFactory
  41             .getLogger(PacketInTranslator.class);
  42     @Override
  43     public List<DataObject> translate(final SwitchConnectionDistinguisher cookie,
  44             final SessionContext sc, final OfHeader msg) {
  45
  46         List<DataObject> salPacketIn = Collections.emptyList();
  47
  48         if (sc != null && msg instanceof PacketInMessage) {
  49             PacketInMessage message = (PacketInMessage)msg;
  50             LOG.trace("PacketIn[v{}]: Cookie: {} Match.type: {}",
  51                     message.getVersion(), message.getCookie(),
  52                     message.getMatch() != null ? message.getMatch().getType() : message.getMatch());
  53
  54            // create a packet received event builder
  55            PacketReceivedBuilder pktInBuilder = new PacketReceivedBuilder();
  56            pktInBuilder.setPayload(message.getData());
  57            if (cookie != null) {
  58                pktInBuilder.setConnectionCookie(new ConnectionCookie(cookie.getCookie()));
  59            }
  60
  61            // get the DPID
  62            GetFeaturesOutput features = sc.getFeatures();
  63            // Make sure we actually have features, some naughty switches start sending packetIn before they send us the FeatureReply
  64            if ( features == null) {
  65                LOG.warn("Received packet_in, but there is no device datapathId received yet");
  66            } else {
  67                BigInteger dpid = features.getDatapathId();
  68
  69                // get the Cookie if it exists
  70                if(message.getCookie() != null) {
  71                    pktInBuilder.setFlowCookie(new FlowCookie(message.getCookie()));
  72                }
  73
  74                // extract the port number
  75                Long port = null;
  76                if (message.getMatch() != null && message.getMatch().getMatchEntries() != null) {
  77                    List<MatchEntries> entries = message.getMatch().getMatchEntries();
  78                    for (MatchEntries entry : entries) {
  79                        PortNumberMatchEntry tmp = entry.getAugmentation(PortNumberMatchEntry.class);
  80                        if (tmp != null) {
  81                            if (port == null) {
  82                                port = tmp.getPortNumber().getValue();
  83                            } else {
  84                                LOG.warn("Multiple input ports discovered when walking through match entries (at least {} and {})",
  85                                         port, tmp.getPortNumber().getValue());
  86                            }
  87                        }
  88                    }
  89                }
  90
  91                if (port == null) {
  92                    // no incoming port, so drop the event
  93                    LOG.warn("Received packet_in, but couldn't find an input port");
  94                } else {
  95                    LOG.trace("Received packet_in from {} on port {}", dpid, port);
  96
  97                    Match match = MatchConvertorImpl.fromOFMatchToSALMatch(message.getMatch(),dpid);
  98                    MatchBuilder matchBuilder = new MatchBuilder(match);
  99                    pktInBuilder.setMatch(matchBuilder.build());
 100
 101                    pktInBuilder.setPacketInReason(PacketInUtil.getMdSalPacketInReason(message.getReason()));
 102                    pktInBuilder.setTableId(new org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableId(message.getTableId().getValue().shortValue()));
 103                    pktInBuilder.setIngress(InventoryDataServiceUtil.nodeConnectorRefFromDatapathIdPortno(dpid,port));
 104                    PacketReceived pktInEvent = pktInBuilder.build();
 105                    salPacketIn = Collections.<DataObject>singletonList(pktInEvent);
 106                }
 107            }
 108         }
 109         return salPacketIn;
 110     }
 111 }