mappingservice/implementation/src/main/java/org/opendaylight/lispflowmapping/implementation/lisp/MapResolver.java

   1 /*
   2  * Copyright (c) 2014 Contextream, 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
   9 package org.opendaylight.lispflowmapping.implementation.lisp;
  10
  11 import java.util.ArrayList;
  12 import java.util.HashSet;
  13 import java.util.List;
  14 import java.util.Map.Entry;
  15
  16 import org.opendaylight.lispflowmapping.implementation.config.ConfigIni;
  17 import org.opendaylight.lispflowmapping.implementation.dao.MappingServiceKeyUtil;
  18 import org.opendaylight.lispflowmapping.implementation.util.DAOMappingUtil;
  19 import org.opendaylight.lispflowmapping.implementation.util.LispAFIConvertor;
  20 import org.opendaylight.lispflowmapping.implementation.util.LispNotificationHelper;
  21 import org.opendaylight.lispflowmapping.interfaces.dao.ILispDAO;
  22 import org.opendaylight.lispflowmapping.interfaces.dao.IMappingServiceKey;
  23 import org.opendaylight.lispflowmapping.interfaces.dao.MappingEntry;
  24 import org.opendaylight.lispflowmapping.interfaces.dao.MappingServiceRLOCGroup;
  25 import org.opendaylight.lispflowmapping.interfaces.dao.MappingServiceSubscriberRLOC;
  26 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapRequestResultHandler;
  27 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapResolverAsync;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.EidToLocatorRecord.Action;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.LcafTrafficEngineeringAddress;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapRequest;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.eidrecords.EidRecord;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.eidtolocatorrecords.EidToLocatorRecord;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.eidtolocatorrecords.EidToLocatorRecordBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.lcaftrafficengineeringaddress.Hops;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.lispaddress.LispAddressContainer;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.locatorrecords.LocatorRecord;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.locatorrecords.LocatorRecordBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.mapreplymessage.MapReplyBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.maprequest.ItrRloc;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 public class MapResolver extends AbstractLispComponent implements IMapResolverAsync {
  44
  45     private static final int TTL_RLOC_TIMED_OUT = 1;
  46     private static final int TTL_NO_RLOC_KNOWN = 15;
  47     protected static final Logger LOG = LoggerFactory.getLogger(MapResolver.class);
  48
  49     private static final ConfigIni configIni = new ConfigIni();
  50     private static final String elpPolicy = configIni.getElpPolicy();
  51
  52     public MapResolver(ILispDAO dao) {
  53         this(dao, true, true);
  54     }
  55
  56     public MapResolver(ILispDAO dao, boolean authenticate, boolean iterateMask) {
  57         super(dao, authenticate, iterateMask);
  58     }
  59
  60     public void handleMapRequest(MapRequest request, boolean smr, IMapRequestResultHandler callback) {
  61         if (dao == null) {
  62             LOG.warn("handleMapRequest called while dao is uninitialized");
  63             return;
  64         }
  65         if (request.isPitr()) {
  66             if (request.getEidRecord().size() > 0) {
  67                 EidRecord eid = request.getEidRecord().get(0);
  68                 Object result = DAOMappingUtil.getLocatorsSpecificByEidRecord(eid, dao, ADDRESS_SUBKEY, shouldIterateMask());
  69                 if (result != null && result instanceof MappingServiceRLOCGroup) {
  70                     MappingServiceRLOCGroup locatorsGroup = (MappingServiceRLOCGroup) result;
  71                     if (locatorsGroup != null && locatorsGroup.getRecords().size() > 0) {
  72                         callback.handleNonProxyMapRequest(request,
  73                                 LispNotificationHelper.getTransportAddressFromContainer(locatorsGroup.getRecords().get(0).getLispAddressContainer()));
  74                     }
  75                 }
  76             }
  77
  78         } else {
  79             MapReplyBuilder builder = new MapReplyBuilder();
  80             builder.setEchoNonceEnabled(false);
  81             builder.setProbe(false);
  82             builder.setSecurityEnabled(false);
  83             builder.setNonce(request.getNonce());
  84             builder.setEidToLocatorRecord(new ArrayList<EidToLocatorRecord>());
  85             for (EidRecord eid : request.getEidRecord()) {
  86                 EidToLocatorRecordBuilder recordBuilder = new EidToLocatorRecordBuilder();
  87                 Entry<IMappingServiceKey, List<MappingServiceRLOCGroup>> mapping = DAOMappingUtil.getMappingForEidRecord(eid, dao);
  88                 recordBuilder.setRecordTtl(0);
  89                 recordBuilder.setAction(Action.NoAction);
  90                 recordBuilder.setAuthoritative(false);
  91                 recordBuilder.setMapVersion((short) 0);
  92                 recordBuilder.setMaskLength((short) mapping.getKey().getMask());
  93                 recordBuilder.setLispAddressContainer(mapping.getKey().getEID());
  94                 recordBuilder.setLocatorRecord(new ArrayList<LocatorRecord>());
  95                 List<MappingServiceRLOCGroup> locators = mapping.getValue();
  96                 if (locators != null && locators.size() > 0) {
  97                     List<ItrRloc> itrRlocs = request.getItrRloc();
  98                     addLocatorGroups(recordBuilder, locators, itrRlocs);
  99                     if (itrRlocs != null && itrRlocs.size() > 0) {
 100                         LispAddressContainer itrRloc = itrRlocs.get(0).getLispAddressContainer();
 101                         MappingServiceSubscriberRLOC subscriberRloc = new MappingServiceSubscriberRLOC(itrRloc);
 102                         HashSet<MappingServiceSubscriberRLOC> subscribers = getSubscribers(mapping.getKey().getEID(), mapping.getKey().getMask());
 103                         if (subscribers == null) {
 104                             subscribers = new HashSet<MappingServiceSubscriberRLOC>();
 105                         } else if (subscribers.contains(subscriberRloc)) {
 106                             /*
 107                              * If there is an entry already for this
 108                              * subscriberRloc, remove it, so that it gets the
 109                              * new timestamp
 110                              */
 111                             subscribers.remove(subscriberRloc);
 112                         }
 113                         if (smr) {
 114                             IMappingServiceKey key = MappingServiceKeyUtil.generateMappingServiceKey(mapping.getKey().getEID(),
 115                                     mapping.getKey().getMask());
 116                             LOG.trace("Adding new subscriber: " + subscriberRloc.toString());
 117                             subscribers.add(subscriberRloc);
 118                             dao.put(key, new MappingEntry<HashSet<MappingServiceSubscriberRLOC>>(SUBSCRIBERS_SUBKEY, subscribers));
 119                         }
 120                     }
 121                 } else {
 122                     recordBuilder
 123                             .setAction(org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.eidtolocatorrecords.EidToLocatorRecord.Action.NativelyForward);
 124                     if (shouldAuthenticate() && getPassword(eid.getLispAddressContainer(), eid.getMask()) != null) {
 125                         recordBuilder.setRecordTtl(TTL_RLOC_TIMED_OUT);
 126                     } else {
 127                         recordBuilder.setRecordTtl(TTL_NO_RLOC_KNOWN);
 128
 129                     }
 130                 }
 131                 builder.getEidToLocatorRecord().add(recordBuilder.build());
 132             }
 133
 134             callback.handleMapReply(builder.build());
 135         }
 136     }
 137
 138     private void addLocatorGroups(EidToLocatorRecordBuilder recordBuilder, List<MappingServiceRLOCGroup> rlocs, List<ItrRloc> itrRlocs) {
 139         for (MappingServiceRLOCGroup rloc : rlocs) {
 140             addLocators(recordBuilder, rloc, itrRlocs);
 141             recordBuilder.setRecordTtl(rloc.getTtl());
 142         }
 143     }
 144
 145     private void addLocators(EidToLocatorRecordBuilder recordBuilder, MappingServiceRLOCGroup locatorObject, List<ItrRloc> itrRlocs) {
 146         if (locatorObject == null) {
 147             return;
 148         }
 149
 150         recordBuilder.setAction(locatorObject.getAction());
 151         recordBuilder.setAuthoritative(locatorObject.isAuthoritative());
 152         recordBuilder.setRecordTtl(locatorObject.getTtl());
 153
 154         try {
 155             for (LocatorRecord record : locatorObject.getRecords()) {
 156                 LispAddressContainer container = record.getLispAddressContainer();
 157
 158                 // For non-ELP RLOCs, or when ELP policy is default, just add the locator and be done
 159                 if ((!(container.getAddress() instanceof LcafTrafficEngineeringAddress)) || elpPolicy.equalsIgnoreCase("default")) {
 160                     recordBuilder.getLocatorRecord().add(
 161                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 162                                     .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 163                                     .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 164                                     .setLispAddressContainer(container).build());
 165                     continue;
 166                 }
 167
 168                 LispAddressContainer nextHop = getNextELPHop((LcafTrafficEngineeringAddress) container.getAddress(), itrRlocs);
 169                 if (nextHop != null) {
 170                     java.lang.Short priority = record.getPriority();
 171                     if (elpPolicy.equalsIgnoreCase("both")) {
 172                         recordBuilder.getLocatorRecord().add(
 173                                 new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 174                                         .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 175                                         .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 176                                         .setLispAddressContainer(container).build());
 177                         // Make the priority of the added simple locator lower so that ELP is used by default if
 178                         // the xTR understands ELP.  Exclude 255, since that means don't use for unicast forwarding
 179                         // XXX Complex cases like several ELPs with different priorities are not handled
 180                         if (priority != 254 || priority !=255) {
 181                             priority++;
 182                         }
 183                     }
 184                     // Build and add the simple RLOC
 185                     recordBuilder.getLocatorRecord().add(
 186                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 187                             .setWeight(record.getWeight()).setPriority(priority).setMulticastWeight(record.getMulticastWeight())
 188                             .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 189                             .setLispAddressContainer(nextHop).build());
 190                 }
 191             }
 192         } catch (ClassCastException cce) {
 193         }
 194     }
 195
 196     private LispAddressContainer getNextELPHop(LcafTrafficEngineeringAddress elp, List<ItrRloc> itrRlocs) {
 197         LispAddressContainer nextHop = null;
 198         List<Hops> hops = elp.getHops();
 199
 200         if (hops != null && hops.size() > 0) {
 201             // By default we return the first hop
 202             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(0).getHop().getPrimitiveAddress()));
 203             for (Hops hop : hops) {
 204                 LispAddressContainer hopContainer = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hop.getHop().getPrimitiveAddress()));
 205                 for (ItrRloc itrRloc : itrRlocs) {
 206                     if (itrRloc.getLispAddressContainer().equals(hopContainer)) {
 207                         int i = hops.indexOf(hop);
 208                         if (i < hops.size() - 1) {
 209                             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(i+1).getHop().getPrimitiveAddress()));
 210                             return nextHop;
 211                         }
 212                     }
 213                 }
 214             }
 215         }
 216
 217         return nextHop;
 218     }
 219
 220 }