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.lispflowmapping.rev131031.EidToLocatorRecord.Action;
  29 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LcafTrafficEngineeringAddress;
  30 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.MapRequest;
  31 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.eidrecords.EidRecord;
  32 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.eidtolocatorrecords.EidToLocatorRecord;
  33 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.eidtolocatorrecords.EidToLocatorRecordBuilder;
  34 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lcaftrafficengineeringaddress.Hops;
  35 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispaddress.LispAddressContainer;
  36 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispaddress.LispAddressContainerBuilder;
  37 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.locatorrecords.LocatorRecord;
  38 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.locatorrecords.LocatorRecordBuilder;
  39 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.mapreplymessage.MapReplyBuilder;
  40 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.maprequest.ItrRloc;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 public class MapResolver extends AbstractLispComponent implements IMapResolverAsync {
  45
  46     private static final int TTL_RLOC_TIMED_OUT = 1;
  47     private static final int TTL_NO_RLOC_KNOWN = 15;
  48     protected static final Logger LOG = LoggerFactory.getLogger(MapResolver.class);
  49
  50     private static final ConfigIni configIni = new ConfigIni();
  51     private static final String elpPolicy = configIni.getElpPolicy();
  52
  53     public MapResolver(ILispDAO dao) {
  54         this(dao, true, true);
  55     }
  56
  57     public MapResolver(ILispDAO dao, boolean authenticate, boolean iterateMask) {
  58         super(dao, authenticate, iterateMask);
  59     }
  60
  61     public void handleMapRequest(MapRequest request, boolean smr, IMapRequestResultHandler callback) {
  62         if (dao == null) {
  63             LOG.warn("handleMapRequest called while dao is uninitialized");
  64             return;
  65         }
  66         if (request.isPitr()) {
  67             if (request.getEidRecord().size() > 0) {
  68                 EidRecord eid = request.getEidRecord().get(0);
  69                 Object result = DAOMappingUtil.getLocatorsSpecificByEidRecord(eid, dao, ADDRESS_SUBKEY, shouldIterateMask());
  70                 if (result != null && result instanceof MappingServiceRLOCGroup) {
  71                     MappingServiceRLOCGroup locatorsGroup = (MappingServiceRLOCGroup) result;
  72                     if (locatorsGroup != null && locatorsGroup.getRecords().size() > 0) {
  73                         callback.handleNonProxyMapRequest(request,
  74                                 LispNotificationHelper.getTransportAddressFromContainer(locatorsGroup.getRecords().get(0).getLispAddressContainer()));
  75                     }
  76                 }
  77             }
  78
  79         } else {
  80             MapReplyBuilder builder = new MapReplyBuilder();
  81             builder.setEchoNonceEnabled(false);
  82             builder.setProbe(false);
  83             builder.setSecurityEnabled(false);
  84             builder.setNonce(request.getNonce());
  85             builder.setEidToLocatorRecord(new ArrayList<EidToLocatorRecord>());
  86             for (EidRecord eid : request.getEidRecord()) {
  87                 EidToLocatorRecordBuilder recordBuilder = new EidToLocatorRecordBuilder();
  88                 Entry<IMappingServiceKey, List<MappingServiceRLOCGroup>> mapping = DAOMappingUtil.getMappingForEidRecord(eid, dao);
  89                 recordBuilder.setRecordTtl(0);
  90                 recordBuilder.setAction(Action.NoAction);
  91                 recordBuilder.setAuthoritative(false);
  92                 recordBuilder.setMapVersion((short) 0);
  93                 recordBuilder.setMaskLength((short) mapping.getKey().getMask());
  94                 recordBuilder.setLispAddressContainer(mapping.getKey().getEID());
  95                 recordBuilder.setLocatorRecord(new ArrayList<LocatorRecord>());
  96                 List<MappingServiceRLOCGroup> locators = mapping.getValue();
  97                 if (locators != null && locators.size() > 0) {
  98                     List<ItrRloc> itrRlocs = request.getItrRloc();
  99                     addLocatorGroups(recordBuilder, locators, itrRlocs);
 100                     if (itrRlocs != null && itrRlocs.size() > 0) {
 101                         LispAddressContainer itrRloc = itrRlocs.get(0).getLispAddressContainer();
 102                         MappingServiceSubscriberRLOC subscriberRloc = new MappingServiceSubscriberRLOC(itrRloc);
 103                         HashSet<MappingServiceSubscriberRLOC> subscribers = getSubscribers(mapping.getKey().getEID(), mapping.getKey().getMask());
 104                         if (subscribers == null) {
 105                             subscribers = new HashSet<MappingServiceSubscriberRLOC>();
 106                         } else if (subscribers.contains(subscriberRloc)) {
 107                             /*
 108                              * If there is an entry already for this
 109                              * subscriberRloc, remove it, so that it gets the
 110                              * new timestamp
 111                              */
 112                             subscribers.remove(subscriberRloc);
 113                         }
 114                         if (smr) {
 115                             IMappingServiceKey key = MappingServiceKeyUtil.generateMappingServiceKey(mapping.getKey().getEID(),
 116                                     mapping.getKey().getMask());
 117                             LOG.trace("Adding new subscriber: " + subscriberRloc.toString());
 118                             subscribers.add(subscriberRloc);
 119                             dao.put(key, new MappingEntry<HashSet<MappingServiceSubscriberRLOC>>(SUBSCRIBERS_SUBKEY, subscribers));
 120                         }
 121                     }
 122                 } else {
 123                     recordBuilder
 124                             .setAction(org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.eidtolocatorrecords.EidToLocatorRecord.Action.NativelyForward);
 125                     if (shouldAuthenticate() && getPassword(eid.getLispAddressContainer(), eid.getMask()) != null) {
 126                         recordBuilder.setRecordTtl(TTL_RLOC_TIMED_OUT);
 127                     } else {
 128                         recordBuilder.setRecordTtl(TTL_NO_RLOC_KNOWN);
 129
 130                     }
 131                 }
 132                 builder.getEidToLocatorRecord().add(recordBuilder.build());
 133             }
 134
 135             callback.handleMapReply(builder.build());
 136         }
 137     }
 138
 139     private void addLocatorGroups(EidToLocatorRecordBuilder recordBuilder, List<MappingServiceRLOCGroup> rlocs, List<ItrRloc> itrRlocs) {
 140         for (MappingServiceRLOCGroup rloc : rlocs) {
 141             addLocators(recordBuilder, rloc, itrRlocs);
 142             recordBuilder.setRecordTtl(rloc.getTtl());
 143         }
 144     }
 145
 146     private void addLocators(EidToLocatorRecordBuilder recordBuilder, MappingServiceRLOCGroup locatorObject, List<ItrRloc> itrRlocs) {
 147         if (locatorObject == null) {
 148             return;
 149         }
 150
 151         recordBuilder.setAction(locatorObject.getAction());
 152         recordBuilder.setAuthoritative(locatorObject.isAuthoritative());
 153         recordBuilder.setRecordTtl(locatorObject.getTtl());
 154
 155         try {
 156             for (LocatorRecord record : locatorObject.getRecords()) {
 157                 LispAddressContainer container = record.getLispAddressContainer();
 158
 159                 // For non-ELP RLOCs, or when ELP policy is default, just add the locator and be done
 160                 if ((!(container.getAddress() instanceof LcafTrafficEngineeringAddress)) || elpPolicy.equalsIgnoreCase("default")) {
 161                     recordBuilder.getLocatorRecord().add(
 162                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 163                                     .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 164                                     .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 165                                     .setLispAddressContainer(container).build());
 166                     continue;
 167                 }
 168
 169                 LispAddressContainer nextHop = getNextELPHop((LcafTrafficEngineeringAddress) container.getAddress(), itrRlocs);
 170                 if (nextHop != null) {
 171                     java.lang.Short priority = record.getPriority();
 172                     if (elpPolicy.equalsIgnoreCase("both")) {
 173                         recordBuilder.getLocatorRecord().add(
 174                                 new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 175                                         .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 176                                         .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 177                                         .setLispAddressContainer(container).build());
 178                         // Make the priority of the added simple locator lower so that ELP is used by default if
 179                         // the xTR understands ELP.  Exclude 255, since that means don't use for unicast forwarding
 180                         // XXX Complex cases like several ELPs with different priorities are not handled
 181                         if (priority != 254 || priority !=255) {
 182                             priority++;
 183                         }
 184                     }
 185                     // Build and add the simple RLOC
 186                     recordBuilder.getLocatorRecord().add(
 187                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 188                             .setWeight(record.getWeight()).setPriority(priority).setMulticastWeight(record.getMulticastWeight())
 189                             .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 190                             .setLispAddressContainer(nextHop).build());
 191                 }
 192             }
 193         } catch (ClassCastException cce) {
 194         }
 195     }
 196
 197     private LispAddressContainer getNextELPHop(LcafTrafficEngineeringAddress elp, List<ItrRloc> itrRlocs) {
 198         LispAddressContainer nextHop = null;
 199         List<Hops> hops = elp.getHops();
 200
 201         if (hops != null && hops.size() > 0) {
 202             // By default we return the first hop
 203             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(0).getHop().getPrimitiveAddress()));
 204             for (Hops hop : hops) {
 205                 LispAddressContainer hopContainer = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hop.getHop().getPrimitiveAddress()));
 206                 for (ItrRloc itrRloc : itrRlocs) {
 207                     if (itrRloc.getLispAddressContainer().equals(hopContainer)) {
 208                         int i = hops.indexOf(hop);
 209                         if (i < hops.size() - 1) {
 210                             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(i+1).getHop().getPrimitiveAddress()));
 211                             return nextHop;
 212                         }
 213                     }
 214                 }
 215             }
 216         }
 217
 218         return nextHop;
 219     }
 220
 221 }