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.interfaces.dao.ILispDAO;
  21 import org.opendaylight.lispflowmapping.interfaces.dao.IMappingServiceKey;
  22 import org.opendaylight.lispflowmapping.interfaces.dao.MappingEntry;
  23 import org.opendaylight.lispflowmapping.interfaces.dao.MappingServiceRLOCGroup;
  24 import org.opendaylight.lispflowmapping.interfaces.dao.MappingServiceSubscriberRLOC;
  25 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapRequestResultHandler;
  26 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapResolverAsync;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.EidToLocatorRecord.Action;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.LcafTrafficEngineeringAddress;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.LispAFIAddress;
  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.lispaddress.lispaddresscontainer.address.LcafTrafficEngineering;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.locatorrecords.LocatorRecord;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.locatorrecords.LocatorRecordBuilder;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.mapreplymessage.MapReplyBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.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
  67         LispAFIAddress srcEid = null;
  68         if (request.getSourceEid() != null) {
  69             srcEid = LispAFIConvertor.toAFI(request.getSourceEid().getLispAddressContainer());
  70         }
  71         MapReplyBuilder builder = new MapReplyBuilder();
  72         builder.setEchoNonceEnabled(false);
  73         builder.setProbe(false);
  74         builder.setSecurityEnabled(false);
  75         builder.setNonce(request.getNonce());
  76         builder.setEidToLocatorRecord(new ArrayList<EidToLocatorRecord>());
  77         for (EidRecord eid : request.getEidRecord()) {
  78             EidToLocatorRecordBuilder recordBuilder = new EidToLocatorRecordBuilder();
  79             Entry<IMappingServiceKey, List<MappingServiceRLOCGroup>> mapping = DAOMappingUtil.getMapping(srcEid, eid, dao);
  80             recordBuilder.setRecordTtl(0);
  81             recordBuilder.setAction(Action.NoAction);
  82             recordBuilder.setAuthoritative(false);
  83             recordBuilder.setMapVersion((short) 0);
  84             recordBuilder.setMaskLength((short) mapping.getKey().getMask());
  85             recordBuilder.setLispAddressContainer(mapping.getKey().getEID());
  86             recordBuilder.setLocatorRecord(new ArrayList<LocatorRecord>());
  87             List<MappingServiceRLOCGroup> locators = mapping.getValue();
  88             if (locators != null && locators.size() > 0) {
  89                 List<ItrRloc> itrRlocs = request.getItrRloc();
  90                 addLocatorGroups(recordBuilder, locators, itrRlocs);
  91                 if (itrRlocs != null && itrRlocs.size() > 0) {
  92                     LispAddressContainer itrRloc = itrRlocs.get(0).getLispAddressContainer();
  93                     MappingServiceSubscriberRLOC subscriberRloc = new MappingServiceSubscriberRLOC(itrRloc);
  94                     HashSet<MappingServiceSubscriberRLOC> subscribers = getSubscribers(mapping.getKey().getEID(), mapping.getKey().getMask());
  95                     if (subscribers == null) {
  96                         subscribers = new HashSet<MappingServiceSubscriberRLOC>();
  97                     } else if (subscribers.contains(subscriberRloc)) {
  98                         /*
  99                          * If there is an entry already for this
 100                          * subscriberRloc, remove it, so that it gets the
 101                          * new timestamp
 102                          */
 103                         subscribers.remove(subscriberRloc);
 104                     }
 105                     if (smr) {
 106                         IMappingServiceKey key = MappingServiceKeyUtil.generateMappingServiceKey(mapping.getKey().getEID(),
 107                                 mapping.getKey().getMask());
 108                         LOG.trace("Adding new subscriber: " + subscriberRloc.toString());
 109                         subscribers.add(subscriberRloc);
 110                         dao.put(key, new MappingEntry<HashSet<MappingServiceSubscriberRLOC>>(SUBSCRIBERS_SUBKEY, subscribers));
 111                     }
 112                 }
 113             } else {
 114                 recordBuilder.setAction(Action.NativelyForward);
 115                 if (shouldAuthenticate() && getPassword(eid.getLispAddressContainer(), eid.getMask()) != null) {
 116                     recordBuilder.setRecordTtl(TTL_RLOC_TIMED_OUT);
 117                 } else {
 118                     recordBuilder.setRecordTtl(TTL_NO_RLOC_KNOWN);
 119
 120                 }
 121             }
 122             builder.getEidToLocatorRecord().add(recordBuilder.build());
 123         }
 124
 125         callback.handleMapReply(builder.build());
 126
 127     }
 128
 129     private void addLocatorGroups(EidToLocatorRecordBuilder recordBuilder, List<MappingServiceRLOCGroup> rlocs, List<ItrRloc> itrRlocs) {
 130         for (MappingServiceRLOCGroup rloc : rlocs) {
 131             addLocators(recordBuilder, rloc, itrRlocs);
 132             recordBuilder.setRecordTtl(rloc.getTtl());
 133         }
 134     }
 135
 136     private void addLocators(EidToLocatorRecordBuilder recordBuilder, MappingServiceRLOCGroup locatorObject, List<ItrRloc> itrRlocs) {
 137         if (locatorObject == null) {
 138             return;
 139         }
 140
 141         recordBuilder.setAction(locatorObject.getAction());
 142         recordBuilder.setAuthoritative(locatorObject.isAuthoritative());
 143         recordBuilder.setRecordTtl(locatorObject.getTtl());
 144
 145         try {
 146             for (LocatorRecord record : locatorObject.getRecords()) {
 147                 LispAddressContainer container = record.getLispAddressContainer();
 148
 149                 // For non-ELP RLOCs, or when ELP policy is default, just add the locator and be done
 150                 if ((!(container.getAddress() instanceof LcafTrafficEngineering)) || elpPolicy.equalsIgnoreCase("default")) {
 151                     recordBuilder.getLocatorRecord().add(
 152                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 153                                     .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 154                                     .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 155                                     .setLispAddressContainer(container).setName(record.getName()).build());
 156                     continue;
 157                 }
 158
 159                 LcafTrafficEngineeringAddress teAddress = ((LcafTrafficEngineering) container.getAddress()).getLcafTrafficEngineeringAddr();
 160                 LispAddressContainer nextHop = getNextELPHop(teAddress, itrRlocs);
 161                 if (nextHop != null) {
 162                     java.lang.Short priority = record.getPriority();
 163                     if (elpPolicy.equalsIgnoreCase("both")) {
 164                         recordBuilder.getLocatorRecord().add(
 165                                 new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 166                                         .setWeight(record.getWeight()).setPriority(record.getPriority()).setMulticastWeight(record.getMulticastWeight())
 167                                         .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 168                                         .setLispAddressContainer(container).setName(record.getName()).build());
 169                         // Make the priority of the added simple locator lower so that ELP is used by default if
 170                         // the xTR understands ELP.  Exclude 255, since that means don't use for unicast forwarding
 171                         // XXX Complex cases like several ELPs with different priorities are not handled
 172                         if (priority != 254 || priority !=255) {
 173                             priority++;
 174                         }
 175                     }
 176                     // Build and add the simple RLOC
 177                     recordBuilder.getLocatorRecord().add(
 178                             new LocatorRecordBuilder().setLocalLocator(record.isLocalLocator()).setRlocProbed(record.isRlocProbed())
 179                             .setWeight(record.getWeight()).setPriority(priority).setMulticastWeight(record.getMulticastWeight())
 180                             .setMulticastPriority(record.getMulticastPriority()).setRouted(true)
 181                             .setLispAddressContainer(nextHop).setName(record.getName()).build());
 182                 }
 183             }
 184         } catch (ClassCastException cce) {
 185             LOG.error("Class Cast Exception while building EidToLocatorRecord: {}", cce);
 186         }
 187     }
 188
 189     private LispAddressContainer getNextELPHop(LcafTrafficEngineeringAddress elp, List<ItrRloc> itrRlocs) {
 190         LispAddressContainer nextHop = null;
 191         List<Hops> hops = elp.getHops();
 192
 193         if (hops != null && hops.size() > 0) {
 194             // By default we return the first hop
 195             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(0).getHop().getPrimitiveAddress()));
 196             for (Hops hop : hops) {
 197                 LispAddressContainer hopContainer = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hop.getHop().getPrimitiveAddress()));
 198                 for (ItrRloc itrRloc : itrRlocs) {
 199                     if (itrRloc.getLispAddressContainer().equals(hopContainer)) {
 200                         int i = hops.indexOf(hop);
 201                         if (i < hops.size() - 1) {
 202                             nextHop = LispAFIConvertor.toContainer(LispAFIConvertor.toAFIfromPrimitive(hops.get(i+1).getHop().getPrimitiveAddress()));
 203                             return nextHop;
 204                         }
 205                     }
 206                 }
 207             }
 208         }
 209
 210         return nextHop;
 211     }
 212
 213 }