mappingservice/southbound/src/main/java/org/opendaylight/lispflowmapping/southbound/lisp/LispSouthboundService.java

   1 /*
   2  * Copyright (c) 2013 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.net.UnknownHostException;
  14 import java.nio.ByteBuffer;
  15
  16 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  17 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessage;
  18 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessageEnum;
  19 import org.opendaylight.lispflowmapping.implementation.serializer.MapRegisterSerializer;
  20 import org.opendaylight.lispflowmapping.implementation.serializer.MapRequestSerializer;
  21 import org.opendaylight.lispflowmapping.implementation.util.ByteUtil;
  22 import org.opendaylight.lispflowmapping.southbound.lisp.exception.LispMalformedPacketException;
  23 import org.opendaylight.lispflowmapping.southbound.lisp.network.PacketHeader;
  24 import org.opendaylight.lispflowmapping.type.sbplugin.MapRegisterNotification;
  25 import org.opendaylight.lispflowmapping.type.sbplugin.MapRequestNotification;
  26 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispAFIAddress;
  27 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispIpv4Address;
  28 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispIpv6Address;
  29 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.MapRegister;
  30 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.MapRequest;
  31 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispaddress.lispaddresscontainer.Address;
  32 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.maprequest.ItrRloc;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 public class LispSouthboundService implements ILispSouthboundService {
  37     private NotificationProviderService notificationProvider;
  38     protected static final Logger logger = LoggerFactory.getLogger(LispSouthboundService.class);
  39
  40     public void setNotificationProvider(NotificationProviderService nps) {
  41         this.notificationProvider = nps;
  42     }
  43
  44     public void handlePacket(DatagramPacket packet) {
  45         ByteBuffer inBuffer = ByteBuffer.wrap(packet.getData(), 0, packet.getLength());
  46         Object lispType = LispMessageEnum.valueOf((byte) (ByteUtil.getUnsignedByte(inBuffer, LispMessage.Pos.TYPE) >> 4));
  47         if (lispType == LispMessageEnum.EncapsulatedControlMessage) {
  48             logger.debug("Recieved packet of type EncapsulatedControlMessage");
  49             handleEncapsulatedControlMessage(inBuffer, packet.getAddress());
  50         } else if (lispType == LispMessageEnum.MapRequest) {
  51             logger.debug("Recieved packet of type MapRequest");
  52             handleMapRequest(inBuffer);
  53         } else if (lispType == LispMessageEnum.MapRegister) {
  54             logger.debug("Recieved packet of type MapRegister");
  55             handleMapRegister(inBuffer, packet.getAddress());
  56         }
  57         logger.debug("Recieved unknown packet type");
  58     }
  59
  60     private void handleEncapsulatedControlMessage(ByteBuffer inBuffer, InetAddress sourceAddress) {
  61         try {
  62             extractEncapsulatedSourcePort(inBuffer);
  63             handleMapRequest(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) {
  70         try {
  71             MapRequest request = MapRequestSerializer.getInstance().deserialize(inBuffer);
  72             InetAddress finalSourceAddress = null;
  73             for (ItrRloc itr : request.getItrRloc()) {
  74                 Address addr = itr.getLispAddressContainer().getAddress();
  75                 if (addr instanceof LispIpv4Address) {
  76                     try {
  77                         finalSourceAddress = InetAddress.getByName(((LispIpv4Address) addr).getIpv4Address().getValue());
  78                     } catch (UnknownHostException e) {
  79                     }
  80                     break;
  81                 }
  82                 if (addr instanceof LispIpv6Address) {
  83                     try {
  84                         finalSourceAddress = InetAddress.getByName((((LispIpv6Address) addr).getIpv6Address().getValue()));
  85                     } catch (UnknownHostException e) {
  86                     }
  87                     break;
  88                 }
  89             }
  90             if (finalSourceAddress == null) {
  91                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request, no ITR Rloc found!");
  92             }
  93
  94             MapRequestNotification requestNotification = new MapRequestNotification(request, finalSourceAddress);
  95             if (notificationProvider != null) {
  96                 notificationProvider.publish(requestNotification);
  97                 logger.debug("MapRequest was published!");
  98             } else {
  99                 logger.error("Notification Provider is null!");
 100             }
 101         } catch (RuntimeException re) {
 102             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
 103         }
 104     }
 105
 106     private int extractEncapsulatedSourcePort(ByteBuffer inBuffer) {
 107         try {
 108             inBuffer.position(PacketHeader.Length.LISP_ENCAPSULATION);
 109             int ipType = (inBuffer.get() >> 4);
 110             if (ipType == 4) {
 111                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV4 - 1);
 112             } else {
 113                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV6_NO_EXT - 1);
 114             }
 115
 116             int encapsulatedSourcePort = inBuffer.getShort() & 0xFFFF;
 117             inBuffer.position(inBuffer.position() + PacketHeader.Length.UDP - 2);
 118             return encapsulatedSourcePort;
 119         } catch (RuntimeException re) {
 120             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
 121         }
 122     }
 123
 124     private void handleMapRegister(ByteBuffer inBuffer, InetAddress sourceAddress) {
 125         try {
 126             MapRegister mapRegister = MapRegisterSerializer.getInstance().deserialize(inBuffer);
 127             MapRegisterNotification registerNotification = new MapRegisterNotification(mapRegister, sourceAddress);
 128             if (notificationProvider != null) {
 129                 notificationProvider.publish(registerNotification);
 130                 logger.debug("MapRegister was published!");
 131             } else {
 132                 logger.error("Notification Provider is null!");
 133             }
 134         } catch (RuntimeException re) {
 135             throw new LispMalformedPacketException("Couldn't deserialize Map-Register (len=" + inBuffer.capacity() + ")", re);
 136         }
 137     }
 138 }