mappingservice/southbound/src/main/java/org/opendaylight/lispflowmapping/southbound/lisp/LispSouthboundHandler.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.southbound.lisp;
  10
  11 import io.netty.buffer.ByteBufUtil;
  12 import io.netty.channel.Channel;
  13 import io.netty.channel.ChannelHandler;
  14 import io.netty.channel.ChannelHandlerContext;
  15 import io.netty.channel.SimpleChannelInboundHandler;
  16 import io.netty.channel.socket.DatagramPacket;
  17 import java.net.InetAddress;
  18 import java.nio.ByteBuffer;
  19 import java.util.ArrayList;
  20 import java.util.Arrays;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.Objects;
  24 import org.opendaylight.lispflowmapping.config.ConfigIni;
  25 import org.opendaylight.lispflowmapping.lisp.authentication.ILispAuthentication;
  26 import org.opendaylight.lispflowmapping.lisp.authentication.LispAuthenticationUtil;
  27 import org.opendaylight.lispflowmapping.lisp.serializer.MapNotifySerializer;
  28 import org.opendaylight.lispflowmapping.lisp.serializer.MapRegisterSerializer;
  29 import org.opendaylight.lispflowmapping.lisp.serializer.MapReplySerializer;
  30 import org.opendaylight.lispflowmapping.lisp.serializer.MapRequestSerializer;
  31 import org.opendaylight.lispflowmapping.lisp.type.LispMessage;
  32 import org.opendaylight.lispflowmapping.lisp.util.ByteUtil;
  33 import org.opendaylight.lispflowmapping.lisp.util.LispAddressStringifier;
  34 import org.opendaylight.lispflowmapping.lisp.util.MapRequestUtil;
  35 import org.opendaylight.lispflowmapping.southbound.ConcurrentLispSouthboundStats;
  36 import org.opendaylight.lispflowmapping.southbound.LispSouthboundPlugin;
  37 import org.opendaylight.lispflowmapping.southbound.lisp.cache.MapRegisterPartialDeserializer;
  38 import org.opendaylight.lispflowmapping.southbound.lisp.exception.LispMalformedPacketException;
  39 import org.opendaylight.lispflowmapping.southbound.lisp.network.PacketHeader;
  40 import org.opendaylight.lispflowmapping.southbound.util.LispNotificationHelper;
  41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.PortNumber;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.AddMappingBuilder;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.GotMapNotifyBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.GotMapReplyBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapNotify;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapRegister;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapReply;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapRequest;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MappingKeepAlive;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MappingKeepAliveBuilder;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MessageType;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.RequestMappingBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.eid.container.Eid;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.key.container.MapRegisterCacheKey;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.metadata.container.MapRegisterCacheMetadata;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.metadata.container.MapRegisterCacheMetadataBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.metadata.container.map.register.cache.metadata.EidLispAddress;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.metadata.container.map.register.cache.metadata.EidLispAddressBuilder;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.value.grouping.MapRegisterCacheValue;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.map.register.cache.value.grouping.MapRegisterCacheValueBuilder;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping.authkey.container.MappingAuthkey;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping.record.container.MappingRecord;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping.record.list.MappingRecordItem;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.transport.address.TransportAddressBuilder;
  65 import org.slf4j.Logger;
  66 import org.slf4j.LoggerFactory;
  67
  68 @ChannelHandler.Sharable
  69 public class LispSouthboundHandler extends SimpleChannelInboundHandler<DatagramPacket>
  70         implements ILispSouthboundService, AutoCloseable {
  71     protected static final Logger LOG = LoggerFactory.getLogger(LispSouthboundHandler.class);
  72
  73     //TODO: think whether this field can be accessed through mappingservice or some other configuration parameter
  74     private boolean authenticationEnabled = ConfigIni.getInstance().isAuthEnabled();
  75     private final LispSouthboundPlugin lispSbPlugin;
  76     private boolean isReadFromChannelEnabled = true;
  77
  78     private Channel channel;
  79
  80     public LispSouthboundHandler(LispSouthboundPlugin lispSbPlugin) {
  81         this.lispSbPlugin = lispSbPlugin;
  82     }
  83
  84     public void handlePacket(DatagramPacket msg) {
  85         ByteBuffer inBuffer = msg.content().nioBuffer();
  86         int type = ByteUtil.getUnsignedByte(inBuffer, LispMessage.Pos.TYPE) >> 4;
  87         handleStats(type);
  88         Object lispType = MessageType.forValue(type);
  89         if (lispType == MessageType.EncapsulatedControlMessage) {
  90             LOG.trace("Received packet of type Encapsulated Control Message");
  91             handleEncapsulatedControlMessage(inBuffer, msg.sender().getAddress());
  92         } else if (lispType == MessageType.MapRequest) {
  93             LOG.trace("Received packet of type Map-Request");
  94             handleMapRequest(inBuffer, msg.sender().getAddress(), msg.sender().getPort());
  95         } else if (lispType == MessageType.MapRegister) {
  96             LOG.trace("Received packet of type Map-Register");
  97             handleMapRegister(inBuffer, msg.sender().getAddress(), msg.sender().getPort());
  98         } else if (lispType == MessageType.MapNotify) {
  99             LOG.trace("Received packet of type Map-Notify");
 100             handleMapNotify(inBuffer, msg.sender().getAddress(), msg.sender().getPort());
 101         } else if (lispType == MessageType.MapReply) {
 102             LOG.trace("Received packet of type Map-Reply");
 103             handleMapReply(inBuffer, msg.sender().getAddress(), msg.sender().getPort());
 104         } else {
 105             LOG.warn("Received unknown LISP control packet (type " + ((lispType != null) ? lispType : type) + ")");
 106         }
 107     }
 108
 109     @SuppressWarnings("checkstyle:IllegalCatch")
 110     private void handleEncapsulatedControlMessage(ByteBuffer inBuffer, InetAddress sourceAddress) {
 111         try {
 112             handleMapRequest(inBuffer, sourceAddress, extractEncapsulatedSourcePort(inBuffer));
 113         } catch (RuntimeException re) {
 114             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len="
 115                     + inBuffer.capacity() + ")", re);
 116         }
 117     }
 118
 119     @SuppressWarnings("checkstyle:IllegalCatch")
 120     private void handleMapRequest(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
 121         try {
 122             MapRequest request = MapRequestSerializer.getInstance().deserialize(inBuffer, sourceAddress);
 123             InetAddress finalSourceAddress = MapRequestUtil.selectItrRloc(request);
 124             if (finalSourceAddress == null) {
 125                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request, no ITR Rloc found!");
 126             }
 127
 128             RequestMappingBuilder requestMappingBuilder = new RequestMappingBuilder();
 129             requestMappingBuilder.setMapRequest(LispNotificationHelper.convertMapRequest(request));
 130             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 131             transportAddressBuilder.setIpAddress(
 132                     LispNotificationHelper.getIpAddressBinaryFromInetAddress(finalSourceAddress));
 133             transportAddressBuilder.setPort(new PortNumber(port));
 134             requestMappingBuilder.setTransportAddress(transportAddressBuilder.build());
 135             lispSbPlugin.sendNotificationIfPossible(requestMappingBuilder.build());
 136         } catch (RuntimeException re) {
 137             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len="
 138                     + inBuffer.capacity() + ")", re);
 139         } catch (InterruptedException e) {
 140             LOG.warn("Notification publication interrupted!");
 141         }
 142     }
 143
 144     @SuppressWarnings("checkstyle:IllegalCatch")
 145     private int extractEncapsulatedSourcePort(ByteBuffer inBuffer) {
 146         try {
 147             inBuffer.position(PacketHeader.Length.LISP_ENCAPSULATION);
 148             int ipType = (inBuffer.get() >> 4);
 149             if (ipType == 4) {
 150                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV4 - 1);
 151             } else if (ipType == 6) {
 152                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV6_NO_EXT - 1);
 153             } else {
 154                 throw new LispMalformedPacketException(
 155                         "Couldn't deserialize Map-Request: inner packet has unknown IP version: " + ipType);
 156             }
 157
 158             int encapsulatedSourcePort = inBuffer.getShort() & 0xFFFF;
 159             inBuffer.position(inBuffer.position() + PacketHeader.Length.UDP - 2);
 160             return encapsulatedSourcePort;
 161         } catch (RuntimeException re) {
 162             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len="
 163                     + inBuffer.capacity() + ")", re);
 164         }
 165     }
 166
 167     @SuppressWarnings("checkstyle:IllegalCatch")
 168     private void handleMapRegister(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
 169         try {
 170             Map.Entry<MapRegisterCacheKey, byte[]> artificialEntry = null;
 171             MapRegisterCacheKey cacheKey = null;
 172             MapRegisterCacheValue cacheValue = null;
 173             if (lispSbPlugin.isMapRegisterCacheEnabled()) {
 174                 artificialEntry = MapRegisterPartialDeserializer.deserializePartially(inBuffer, sourceAddress);
 175                 cacheKey = artificialEntry == null ? null : artificialEntry.getKey();
 176                 cacheValue = resolveCacheValue(artificialEntry);
 177             }
 178             if (cacheValue != null) {
 179                 lispSbPlugin.getStats().incrementCacheHits();
 180                 MapRegisterCacheMetadata mapRegisterMeta = cacheValue.getMapRegisterCacheMetadata();
 181                 LOG.debug("Map register message site-ID: {} xTR-ID: {} from cache.", mapRegisterMeta.getSiteId(),
 182                         mapRegisterMeta.getXtrId());
 183                 cacheValue = refreshEntry(cacheKey);
 184                 if (cacheValue != null) {
 185                     lispSbPlugin.sendNotificationIfPossible(createMappingKeepAlive(cacheValue));
 186                     if (cacheValue.getMapRegisterCacheMetadata().isWantMapNotify()) {
 187                         sendMapNotifyMsg(inBuffer, sourceAddress, port, cacheValue);
 188                     }
 189                 }
 190             } else {
 191                 lispSbPlugin.getStats().incrementCacheMisses();
 192                 MapRegister mapRegister = MapRegisterSerializer.getInstance().deserialize(inBuffer, sourceAddress);
 193
 194                 MappingAuthkey mappingAuthkey = null;
 195                 if (authenticationEnabled) {
 196                     mappingAuthkey = tryToAuthenticateMessage(mapRegister, inBuffer);
 197                     if (mappingAuthkey == null) {
 198                         return;
 199                     }
 200                 }
 201
 202                 AddMappingBuilder addMappingBuilder = new AddMappingBuilder();
 203                 addMappingBuilder.setMapRegister(LispNotificationHelper.convertMapRegister(mapRegister));
 204                 TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 205                 transportAddressBuilder.setIpAddress(LispNotificationHelper.getIpAddressBinaryFromInetAddress(
 206                         sourceAddress));
 207                 transportAddressBuilder.setPort(new PortNumber(port));
 208                 addMappingBuilder.setTransportAddress(transportAddressBuilder.build());
 209                 lispSbPlugin.sendNotificationIfPossible(addMappingBuilder.build());
 210                 if (artificialEntry != null) {
 211                     final MapRegisterCacheMetadataBuilder cacheMetadataBldNew = new
 212                             MapRegisterCacheMetadataBuilder();
 213                     cacheMetadataBldNew.setEidLispAddress(provideEidPrefixesFromMessage(mapRegister));
 214                     cacheMetadataBldNew.setXtrId(mapRegister.getXtrId());
 215                     cacheMetadataBldNew.setSiteId(mapRegister.getSiteId());
 216                     cacheMetadataBldNew.setWantMapNotify(mapRegister.isWantMapNotify());
 217                     cacheMetadataBldNew.setMergeEnabled(mapRegister.isMergeEnabled());
 218                     cacheMetadataBldNew.setTimestamp(System.currentTimeMillis());
 219
 220                     final MapRegisterCacheValueBuilder cacheValueBldNew = new MapRegisterCacheValueBuilder();
 221                     cacheValueBldNew.setPacketData(artificialEntry.getValue());
 222                     cacheValueBldNew.setMappingAuthkey(mappingAuthkey);
 223                     cacheValueBldNew.setMapRegisterCacheMetadata(cacheMetadataBldNew.build());
 224
 225                     lispSbPlugin.getMapRegisterCache().addEntry(cacheKey, cacheValueBldNew.build());
 226                 }
 227             }
 228         } catch (RuntimeException re) {
 229             throw new LispMalformedPacketException("Couldn't deserialize Map-Register (len="
 230                     + inBuffer.capacity() + ")", re);
 231         } catch (InterruptedException e) {
 232             LOG.warn("Notification publication interrupted!");
 233         }
 234     }
 235
 236     private MapRegisterCacheValue refreshEntry(final MapRegisterCacheKey cacheKey) {
 237         MapRegisterCacheValue mapRegisterCacheValue = lispSbPlugin.getMapRegisterCache().refreshEntry(cacheKey);
 238         if (mapRegisterCacheValue != null) {
 239             mapRegisterCacheValue = refreshAuthKeyIfNecessary(mapRegisterCacheValue);
 240             lispSbPlugin.getMapRegisterCache().addEntry(cacheKey, mapRegisterCacheValue);
 241             return mapRegisterCacheValue;
 242         }
 243         return null;
 244     }
 245
 246     private MapRegisterCacheValue refreshAuthKeyIfNecessary(MapRegisterCacheValue mapRegisterCacheValue) {
 247         final List<EidLispAddress> eids = mapRegisterCacheValue.getMapRegisterCacheMetadata().getEidLispAddress();
 248
 249         if (lispSbPlugin.getAuthenticationKeyDataListener().authKeysForEidsUnchanged(
 250                 eids, lispSbPlugin.getMapRegisterCacheTimeout())) {
 251             return mapRegisterCacheValue;
 252         }
 253
 254         final MappingAuthkey mappingAuthkey = provideAuthenticateKey(eids);
 255         final MapRegisterCacheValueBuilder newMapRegisterCacheValueBuilder = new MapRegisterCacheValueBuilder(
 256                 mapRegisterCacheValue);
 257         final MapRegisterCacheMetadataBuilder newMapRegisterCacheMetadataBuilder =
 258                 new MapRegisterCacheMetadataBuilder(mapRegisterCacheValue.getMapRegisterCacheMetadata());
 259
 260         newMapRegisterCacheValueBuilder.setMappingAuthkey(mappingAuthkey);
 261         newMapRegisterCacheValueBuilder.setMapRegisterCacheMetadata(newMapRegisterCacheMetadataBuilder.build());
 262         return newMapRegisterCacheValueBuilder.build();
 263     }
 264
 265     private MapRegisterCacheValue resolveCacheValue(Map.Entry<MapRegisterCacheKey, byte[]> entry) {
 266         if (entry != null) {
 267             final MapRegisterCacheValue mapRegisterCacheValue =
 268                     lispSbPlugin.getMapRegisterCache().getEntry(entry.getKey());
 269             if (mapRegisterCacheValue != null) {
 270                 final long creationTime = mapRegisterCacheValue.getMapRegisterCacheMetadata().getTimestamp();
 271                 final long currentTime = System.currentTimeMillis();
 272                 if (currentTime - creationTime > lispSbPlugin.getMapRegisterCacheTimeout()) {
 273                     lispSbPlugin.getMapRegisterCache().removeEntry(entry.getKey());
 274                     return null;
 275                 } else if (Arrays.equals(mapRegisterCacheValue.getPacketData(), entry.getValue())) {
 276                     return mapRegisterCacheValue;
 277                 }
 278             }
 279         }
 280         return null;
 281     }
 282
 283     private MappingKeepAlive createMappingKeepAlive(final MapRegisterCacheValue value) {
 284         MappingKeepAliveBuilder mappingKeepAliveBuilder = new MappingKeepAliveBuilder();
 285         mappingKeepAliveBuilder.setMapRegisterCacheMetadata(value.getMapRegisterCacheMetadata());
 286         return mappingKeepAliveBuilder.build();
 287     }
 288
 289     /**
 290      * Returns null if not all of eids have the same value of authentication key.
 291      */
 292     private MappingAuthkey provideAuthenticateKey(final List<EidLispAddress> eidLispAddresses) {
 293         MappingAuthkey firstAuthKey = null;
 294         for (int i = 0; i < eidLispAddresses.size(); i++) {
 295             final Eid eid = eidLispAddresses.get(i).getEid();
 296             if (i == 0) {
 297                 firstAuthKey = lispSbPlugin.getAkdb().getAuthenticationKey(eid);
 298             } else {
 299                 final MappingAuthkey authKey = lispSbPlugin.getAkdb().getAuthenticationKey(eid);
 300                 if (!Objects.equals(firstAuthKey, authKey)) {
 301                     return null;
 302                 }
 303             }
 304         }
 305         return firstAuthKey;
 306
 307     }
 308
 309     private void sendMapNotifyMsg(final ByteBuffer inBuffer, final InetAddress inetAddress, int portNumber,
 310                                   MapRegisterCacheValue mapRegisterValue) {
 311         if (mapRegisterValue.getMappingAuthkey().getKeyType() != null) {
 312             ByteBuffer outBuffer = transformMapRegisterToMapNotify(inBuffer);
 313             if (mapRegisterValue.getMappingAuthkey().getKeyType() != 0) {
 314                 outBuffer = calculateAndSetNewMAC(outBuffer, mapRegisterValue.getMappingAuthkey().getKeyString());
 315             }
 316             outBuffer.position(0);
 317             lispSbPlugin.handleSerializedLispBuffer(inetAddress, outBuffer, MessageType.MapNotify, portNumber,
 318                     this.channel);
 319         } else {
 320             LOG.error("Map-Register Cache: authentication succeeded, but can't find auth key for sending Map-Notify");
 321         }
 322     }
 323
 324     /**
 325      * Calculates new message authentication code (MAC) for notify message.
 326      */
 327     private ByteBuffer calculateAndSetNewMAC(final ByteBuffer buffer, final String authKey) {
 328         final byte[] authenticationData = LispAuthenticationUtil.createAuthenticationData(buffer, authKey);
 329         buffer.position(ILispAuthentication.MAP_REGISTER_AND_NOTIFY_AUTHENTICATION_POSITION);
 330         buffer.put(authenticationData);
 331         return buffer;
 332     }
 333
 334     private ByteBuffer transformMapRegisterToMapNotify(final ByteBuffer buffer) {
 335         buffer.position(0);
 336         byte typeAndFlags = buffer.get(0);
 337         // Shift the xTR-ID present and built for an RTR bits to their correct position
 338         byte flags = (byte) ((typeAndFlags << 2) & 0x0F);
 339         // Set control message type to 4 (Map-Notify)
 340         byte type = 0x40;
 341         // Combine the nibbles
 342         typeAndFlags = (byte) (type | flags);
 343         byte[] byteReplacement = new byte[] {typeAndFlags, 0x00, 0x00};
 344         buffer.put(byteReplacement);
 345
 346         return buffer;
 347     }
 348
 349     private List<EidLispAddress> provideEidPrefixesFromMessage(final MapRegister mapRegister) {
 350         List<EidLispAddress> eidsResult = new ArrayList<>();
 351         for (MappingRecordItem mappingRecordItem : mapRegister.getMappingRecordItem()) {
 352             final EidLispAddressBuilder eidLispAddressBuilder = new EidLispAddressBuilder();
 353             final Eid eid = mappingRecordItem.getMappingRecord().getEid();
 354             eidLispAddressBuilder.setEidLispAddressId(LispAddressStringifier.getString(eid));
 355             eidLispAddressBuilder.setEid(eid);
 356             eidsResult.add(eidLispAddressBuilder.build());
 357         }
 358         return eidsResult;
 359     }
 360
 361     /**
 362      * Checks whether authentication data is valid.
 363      *
 364      * <p>Methods pass through all records from map register message. For the EID of the first record it gets
 365      * authentication key and does validation of authentication data again this authentication key. If it pass
 366      * it just checks for remaining records (and its EID) whether they have the same authentication key stored in
 367      * the authentication key database.
 368      *
 369      * @return Returns authentication key if all of EIDs have the same authentication key or null otherwise
 370      */
 371     private MappingAuthkey tryToAuthenticateMessage(final MapRegister mapRegister, final ByteBuffer byteBuffer) {
 372         if (lispSbPlugin.getAkdb() == null) {
 373             LOG.debug("Simple map cache wasn't instantieted and set.");
 374             return null;
 375         }
 376
 377         MappingAuthkey firstAuthKey = null;
 378         final List<MappingRecordItem> mappingRecords = mapRegister.getMappingRecordItem();
 379         for (int i = 0; i < mappingRecords.size(); i++) {
 380             final MappingRecordItem recordItem = mappingRecords.get(i);
 381             final MappingRecord mappingRecord = recordItem.getMappingRecord();
 382             if (i == 0) {
 383                 firstAuthKey = lispSbPlugin.getAkdb().getAuthenticationKey(mappingRecord.getEid());
 384                 if (!LispAuthenticationUtil.validate(mapRegister, byteBuffer, mappingRecord.getEid(), firstAuthKey)) {
 385                     return null;
 386                 }
 387             } else {
 388                 final Eid eid = mappingRecord.getEid();
 389                 final MappingAuthkey authKey = lispSbPlugin.getAkdb().getAuthenticationKey(eid);
 390                 if (!firstAuthKey.equals(authKey)) {
 391                     LOG.debug("Map register packet contained several eids. Authentication keys for first one and for "
 392                             + "{} are different.",LispAddressStringifier.getString(eid));
 393                     return null;
 394                 }
 395             }
 396         }
 397         return firstAuthKey;
 398     }
 399
 400     @SuppressWarnings("checkstyle:IllegalCatch")
 401     private void handleMapNotify(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
 402         try {
 403             MapNotify mapNotify = MapNotifySerializer.getInstance().deserialize(inBuffer);
 404             GotMapNotifyBuilder gotMapNotifyBuilder = new GotMapNotifyBuilder();
 405             gotMapNotifyBuilder.setMapNotify(LispNotificationHelper.convertMapNotify(mapNotify));
 406             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 407             transportAddressBuilder.setIpAddress(LispNotificationHelper
 408                     .getIpAddressBinaryFromInetAddress(sourceAddress));
 409             transportAddressBuilder.setPort(new PortNumber(port));
 410             gotMapNotifyBuilder.setTransportAddress(transportAddressBuilder.build());
 411             lispSbPlugin.sendNotificationIfPossible(gotMapNotifyBuilder.build());
 412         } catch (RuntimeException re) {
 413             throw new LispMalformedPacketException("Couldn't deserialize Map-Notify (len="
 414                     + inBuffer.capacity() + ")", re);
 415         } catch (InterruptedException e) {
 416             LOG.warn("Notification publication interrupted!");
 417         }
 418     }
 419
 420     @SuppressWarnings("checkstyle:IllegalCatch")
 421     private void handleMapReply(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
 422         try {
 423             MapReply mapReply = MapReplySerializer.getInstance().deserialize(inBuffer);
 424             GotMapReplyBuilder gotMapReplyBuilder = new GotMapReplyBuilder();
 425             gotMapReplyBuilder.setMapReply(LispNotificationHelper.convertMapReply(mapReply));
 426             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 427             transportAddressBuilder.setIpAddress(LispNotificationHelper
 428                     .getIpAddressBinaryFromInetAddress(sourceAddress));
 429             transportAddressBuilder.setPort(new PortNumber(port));
 430             gotMapReplyBuilder.setTransportAddress(transportAddressBuilder.build());
 431             lispSbPlugin.sendNotificationIfPossible(gotMapReplyBuilder.build());
 432         } catch (RuntimeException re) {
 433             throw new LispMalformedPacketException("Couldn't deserialize Map-Reply (len="
 434                     + inBuffer.capacity() + ")", re);
 435         } catch (InterruptedException e) {
 436             LOG.warn("Notification publication interrupted!");
 437         }
 438     }
 439
 440     private void handleStats(int type) {
 441         if (lispSbPlugin.getStats() != null) {
 442             if (type <= ConcurrentLispSouthboundStats.MAX_LISP_TYPES) {
 443                 lispSbPlugin.getStats().incrementRx(type);
 444             } else {
 445                 lispSbPlugin.getStats().incrementRxUnknown();
 446             }
 447         }
 448     }
 449
 450     @Override
 451     protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) throws Exception {
 452         if (isReadFromChannelEnabled) {
 453             if (LOG.isTraceEnabled()) {
 454                 LOG.trace("Received UDP packet from {}:{} with content:\n{}", msg.sender().getHostString(),
 455                         msg.sender().getPort(), ByteBufUtil.prettyHexDump(msg.content()));
 456             }
 457             this.channel = ctx.channel();
 458             handlePacket(msg);
 459         }
 460     }
 461
 462     @Override
 463     public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
 464         ctx.flush();
 465     }
 466
 467     @Override
 468     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
 469         LOG.error("Error on channel: " + cause, cause);
 470     }
 471
 472     @Override
 473     public void close() throws Exception {
 474     }
 475 }