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.Inet4Address;
  13 import java.net.InetAddress;
  14 import java.net.UnknownHostException;
  15 import java.nio.ByteBuffer;
  16
  17 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  18 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessage;
  19 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessageEnum;
  20 import org.opendaylight.lispflowmapping.implementation.serializer.MapRegisterSerializer;
  21 import org.opendaylight.lispflowmapping.implementation.serializer.MapRequestSerializer;
  22 import org.opendaylight.lispflowmapping.implementation.util.ByteUtil;
  23 import org.opendaylight.lispflowmapping.implementation.util.LispNotificationHelper;
  24 import org.opendaylight.lispflowmapping.southbound.lisp.exception.LispMalformedPacketException;
  25 import org.opendaylight.lispflowmapping.southbound.lisp.network.PacketHeader;
  26 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.AddMappingBuilder;
  27 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispAFIAddress;
  28 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispIpv4Address;
  29 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispIpv6Address;
  30 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.MapRegister;
  31 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.MapRequest;
  32 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.RequestMappingBuilder;
  33 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.lispaddress.lispaddresscontainer.Address;
  34 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.mapregisternotification.MapRegisterBuilder;
  35 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.maprequest.ItrRloc;
  36 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.maprequestnotification.MapRequestBuilder;
  37 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.transportaddress.TransportAddressBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  39 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
  40 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Address;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 public class LispSouthboundService implements ILispSouthboundService {
  45     private NotificationProviderService notificationProvider;
  46     protected static final Logger logger = LoggerFactory.getLogger(LispSouthboundService.class);
  47
  48     public void setNotificationProvider(NotificationProviderService nps) {
  49         this.notificationProvider = nps;
  50     }
  51
  52     public void handlePacket(DatagramPacket packet) {
  53         ByteBuffer inBuffer = ByteBuffer.wrap(packet.getData(), 0, packet.getLength());
  54         Object lispType = LispMessageEnum.valueOf((byte) (ByteUtil.getUnsignedByte(inBuffer, LispMessage.Pos.TYPE) >> 4));
  55         if (lispType == LispMessageEnum.EncapsulatedControlMessage) {
  56             logger.trace("Recieved packet of type EncapsulatedControlMessage");
  57             handleEncapsulatedControlMessage(inBuffer, packet.getAddress());
  58         } else if (lispType == LispMessageEnum.MapRequest) {
  59             logger.trace("Recieved packet of type MapRequest");
  60             handleMapRequest(inBuffer);
  61         } else if (lispType == LispMessageEnum.MapRegister) {
  62             logger.trace("Recieved packet of type MapRegister");
  63             handleMapRegister(inBuffer, packet.getAddress());
  64         }
  65         logger.warn("Recieved unknown packet type");
  66     }
  67
  68     private void handleEncapsulatedControlMessage(ByteBuffer inBuffer, InetAddress sourceAddress) {
  69         try {
  70             extractEncapsulatedSourcePort(inBuffer);
  71             handleMapRequest(inBuffer);
  72         } catch (RuntimeException re) {
  73             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
  74         }
  75     }
  76
  77     private void handleMapRequest(ByteBuffer inBuffer) {
  78         try {
  79             MapRequest request = MapRequestSerializer.getInstance().deserialize(inBuffer);
  80             InetAddress finalSourceAddress = null;
  81             for (ItrRloc itr : request.getItrRloc()) {
  82                 Address addr = itr.getLispAddressContainer().getAddress();
  83                 if (addr instanceof LispIpv4Address) {
  84                     try {
  85                         finalSourceAddress = InetAddress.getByName(((LispIpv4Address) addr).getIpv4Address().getValue());
  86                     } catch (UnknownHostException e) {
  87                     }
  88                     break;
  89                 }
  90                 if (addr instanceof LispIpv6Address) {
  91                     try {
  92                         finalSourceAddress = InetAddress.getByName((((LispIpv6Address) addr).getIpv6Address().getValue()));
  93                     } catch (UnknownHostException e) {
  94                     }
  95                     break;
  96                 }
  97             }
  98             if (finalSourceAddress == null) {
  99                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request, no ITR Rloc found!");
 100             }
 101
 102             RequestMappingBuilder requestMappingBuilder = new RequestMappingBuilder();
 103             requestMappingBuilder.setMapRequest(LispNotificationHelper.convertMapRequest(request));
 104             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 105             transportAddressBuilder.setIpAddress(LispNotificationHelper.getIpAddressFromInetAddress(finalSourceAddress));
 106             requestMappingBuilder.setTransportAddress(transportAddressBuilder.build());
 107             if (notificationProvider != null) {
 108                 notificationProvider.publish(requestMappingBuilder.build());
 109                 logger.trace("MapRequest was published!");
 110             } else {
 111                 logger.warn("Notification Provider is null!");
 112             }
 113         } catch (RuntimeException re) {
 114             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
 115         }
 116     }
 117
 118     private int extractEncapsulatedSourcePort(ByteBuffer inBuffer) {
 119         try {
 120             inBuffer.position(PacketHeader.Length.LISP_ENCAPSULATION);
 121             int ipType = (inBuffer.get() >> 4);
 122             if (ipType == 4) {
 123                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV4 - 1);
 124             } else {
 125                 inBuffer.position(inBuffer.position() + PacketHeader.Length.IPV6_NO_EXT - 1);
 126             }
 127
 128             int encapsulatedSourcePort = inBuffer.getShort() & 0xFFFF;
 129             inBuffer.position(inBuffer.position() + PacketHeader.Length.UDP - 2);
 130             return encapsulatedSourcePort;
 131         } catch (RuntimeException re) {
 132             throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
 133         }
 134     }
 135
 136     private void handleMapRegister(ByteBuffer inBuffer, InetAddress sourceAddress) {
 137         try {
 138             MapRegister mapRegister = MapRegisterSerializer.getInstance().deserialize(inBuffer);
 139             AddMappingBuilder addMappingBuilder = new AddMappingBuilder();
 140             addMappingBuilder.setMapRegister(LispNotificationHelper.convertMapRegister(mapRegister));
 141             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
 142             transportAddressBuilder.setIpAddress(LispNotificationHelper.getIpAddressFromInetAddress(sourceAddress));
 143             addMappingBuilder.setTransportAddress(transportAddressBuilder.build());
 144             if (notificationProvider != null) {
 145                 notificationProvider.publish(addMappingBuilder.build());
 146                 logger.trace("MapRegister was published!");
 147             } else {
 148                 logger.warn("Notification Provider is null!");
 149             }
 150         } catch (RuntimeException re) {
 151             throw new LispMalformedPacketException("Couldn't deserialize Map-Register (len=" + inBuffer.capacity() + ")", re);
 152         }
 153     }
 154 }