mappingservice/southbound/src/main/java/org/opendaylight/lispflowmapping/southbound/lisp/LispSouthboundService.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 java.net.DatagramPacket;
  12 import java.net.InetAddress;
  13 import java.nio.ByteBuffer;
  14
  15 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  16 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessage;
  17 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessageEnum;
  18 import org.opendaylight.lispflowmapping.implementation.serializer.MapRegisterSerializer;
  19 import org.opendaylight.lispflowmapping.implementation.serializer.MapRequestSerializer;
  20 import org.opendaylight.lispflowmapping.implementation.util.ByteUtil;
  21 import org.opendaylight.lispflowmapping.implementation.util.LispNotificationHelper;
  22 import org.opendaylight.lispflowmapping.implementation.util.MapRequestUtil;
  23 import org.opendaylight.lispflowmapping.southbound.lisp.exception.LispMalformedPacketException;
  24 import org.opendaylight.lispflowmapping.southbound.lisp.network.PacketHeader;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.AddMappingBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapRegister;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapRequest;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.RequestMappingBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.transportaddress.TransportAddressBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.PortNumber;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 public class LispSouthboundService implements ILispSouthboundService {
  35     private NotificationProviderService notificationProvider;
  36     protected static final Logger LOG = LoggerFactory.getLogger(LispSouthboundService.class);
  37
  38     public void setNotificationProvider(NotificationProviderService nps) {
  39         this.notificationProvider = nps;
  40     }
  41
  42     public void handlePacket(DatagramPacket packet) {
  43         ByteBuffer inBuffer = ByteBuffer.wrap(packet.getData(), 0, packet.getLength());
  44         int type = ByteUtil.getUnsignedByte(inBuffer, LispMessage.Pos.TYPE) >> 4;
  45         Object lispType = LispMessageEnum.valueOf((byte) (type));
  46         if (lispType == LispMessageEnum.EncapsulatedControlMessage) {
  47             LOG.trace("Received packet of type EncapsulatedControlMessage");
  48             handleEncapsulatedControlMessage(inBuffer, packet.getAddress());
  49         } else if (lispType == LispMessageEnum.MapRequest) {
  50             LOG.trace("Received packet of type MapRequest");
  51             handleMapRequest(inBuffer, packet.getPort());
  52         } else if (lispType == LispMessageEnum.MapRegister) {
  53             LOG.trace("Received packet of type MapRegister");
  54             handleMapRegister(inBuffer, packet.getAddress(), packet.getPort());
  55         } else {
  56             LOG.warn("Received unknown LISP control packet (type " + ((lispType != null) ? lispType : type) + ")");
  57             LOG.trace("Buffer: " + ByteUtil.bytesToHex(packet.getData(), packet.getLength()));
  58         }
  59     }
  60
  61     private void handleEncapsulatedControlMessage(ByteBuffer inBuffer, InetAddress sourceAddress) {
  62         try {
  63             handleMapRequest(inBuffer, extractEncapsulatedSourcePort(inBuffer));
  64         } catch (RuntimeException re) {
  65             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
  66         }
  67     }
  68
  69     private void handleMapRequest(ByteBuffer inBuffer, int port) {
  70         try {
  71             MapRequest request = MapRequestSerializer.getInstance().deserialize(inBuffer);
  72             InetAddress finalSourceAddress = MapRequestUtil.selectItrRloc(request);
  73             if (finalSourceAddress == null) {
  74                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request, no ITR Rloc found!");
  75             }
  76
  77             RequestMappingBuilder requestMappingBuilder = new RequestMappingBuilder();
  78             requestMappingBuilder.setMapRequest(LispNotificationHelper.convertMapRequest(request));
  79             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
  80             transportAddressBuilder.setIpAddress(LispNotificationHelper.getIpAddressFromInetAddress(finalSourceAddress));
  81             transportAddressBuilder.setPort(new PortNumber(port));
  82             requestMappingBuilder.setTransportAddress(transportAddressBuilder.build());
  83             if (notificationProvider != null) {
  84                 notificationProvider.publish(requestMappingBuilder.build());
  85                 LOG.trace("MapRequest was published!");
  86             } else {
  87                 LOG.warn("Notification Provider is null!");
  88             }
  89         } catch (RuntimeException re) {
  90             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
  91         }
  92     }
  93
  94     private int extractEncapsulatedSourcePort(ByteBuffer inBuffer) {
  95         try {
  96             inBuffer.position(PacketHeader.Length.LISP_ENCAPSULATION);
  97             int ipType = (inBuffer.get() >> 4);
  98             if (ipType == 4) {
  99                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV4 - 1);
 100             } else if (ipType == 6) {
 101                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV6_NO_EXT - 1);
 102             } else {
 103                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request: inner packet has unknown IP version: " + ipType);
 104             }
 105
 106             int encapsulatedSourcePort = inBuffer.getShort() & 0xFFFF;
 107             inBuffer.position(inBuffer.position() + PacketHeader.Length.UDP - 2);
 108             return encapsulatedSourcePort;
 109         } catch (RuntimeException re) {
 110             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
 111         }
 112     }
 113
 114     private void handleMapRegister(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
 115         try {
 116             MapRegister mapRegister = MapRegisterSerializer.getInstance().deserialize(inBuffer);
 117             AddMappingBuilder addMappingBuilder = new AddMappingBuilder();
 118             addMappingBuilder.setMapRegister(LispNotificationHelper.convertMapRegister(mapRegister));
 119             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 120             transportAddressBuilder.setIpAddress(LispNotificationHelper.getIpAddressFromInetAddress(sourceAddress));
 121             transportAddressBuilder.setPort(new PortNumber(port));
 122             addMappingBuilder.setTransportAddress(transportAddressBuilder.build());
 123             if (notificationProvider != null) {
 124                 notificationProvider.publish(addMappingBuilder.build());
 125                 LOG.trace("MapRegister was published!");
 126             } else {
 127                 LOG.warn("Notification Provider is null!");
 128             }
 129         } catch (RuntimeException re) {
 130             throw new LispMalformedPacketException("Couldn't deserialize Map-Register (len=" + inBuffer.capacity() + ")", re);
 131         }
 132     }
 133 }