mappingservice/southbound/src/main/java/org/opendaylight/lispflowmapping/southbound/lisp/LispXtrSouthboundHandler.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.ChannelHandlerContext;
  13 import io.netty.channel.SimpleChannelInboundHandler;
  14 import io.netty.channel.socket.DatagramPacket;
  15 import java.net.InetAddress;
  16 import java.nio.ByteBuffer;
  17 import org.opendaylight.lispflowmapping.lisp.serializer.MapReplySerializer;
  18 import org.opendaylight.lispflowmapping.lisp.serializer.MapRequestSerializer;
  19 import org.opendaylight.lispflowmapping.lisp.type.LispMessage;
  20 import org.opendaylight.lispflowmapping.lisp.util.ByteUtil;
  21 import org.opendaylight.lispflowmapping.lisp.util.MapRequestUtil;
  22 import org.opendaylight.lispflowmapping.southbound.LispSouthboundPlugin;
  23 import org.opendaylight.lispflowmapping.southbound.lisp.exception.LispMalformedPacketException;
  24 import org.opendaylight.lispflowmapping.southbound.util.LispNotificationHelper;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.PortNumber;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapReply;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapRequest;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MessageType;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.XtrReplyMappingBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.XtrRequestMappingBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.transport.address.TransportAddressBuilder;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 public class LispXtrSouthboundHandler extends SimpleChannelInboundHandler<DatagramPacket>
  36         implements ILispSouthboundService {
  37     private final LispSouthboundPlugin lispSbPlugin;
  38     protected static final Logger LOG = LoggerFactory.getLogger(LispXtrSouthboundHandler.class);
  39
  40     public LispXtrSouthboundHandler(LispSouthboundPlugin lispSbPlugin) {
  41         this.lispSbPlugin = lispSbPlugin;
  42     }
  43
  44     public void handlePacket(DatagramPacket packet) {
  45         ByteBuffer inBuffer = packet.content().nioBuffer();
  46         Object lispType = MessageType.forValue((int) (ByteUtil.getUnsignedByte(inBuffer, LispMessage.Pos.TYPE) >> 4));
  47         if (lispType == MessageType.MapRequest) {
  48             LOG.trace("Received packet of type MapRequest for xTR");
  49             handleMapRequest(inBuffer, packet.sender().getAddress());
  50         } else if (lispType ==  MessageType.MapReply) {
  51             LOG.trace("Received packet of type MapReply for xTR");
  52             handleMapReply(inBuffer);
  53         } else {
  54             LOG.warn("Received unknown packet type");
  55         }
  56     }
  57
  58     @SuppressWarnings("checkstyle:IllegalCatch")
  59     private void handleMapRequest(ByteBuffer inBuffer, InetAddress sourceAddress) {
  60         try {
  61             MapRequest request = MapRequestSerializer.getInstance().deserialize(inBuffer, sourceAddress);
  62             InetAddress finalSourceAddress = MapRequestUtil.selectItrRloc(request);
  63             if (finalSourceAddress == null) {
  64                 throw new LispMalformedPacketException("Couldn't deserialize Map-Request, no ITR Rloc found!");
  65             }
  66
  67             XtrRequestMappingBuilder requestMappingBuilder = new XtrRequestMappingBuilder();
  68             requestMappingBuilder.setMapRequest(LispNotificationHelper.convertMapRequest(request));
  69             TransportAddressBuilder transportAddressBuilder = new TransportAddressBuilder();
  70             transportAddressBuilder.setIpAddress(
  71                     LispNotificationHelper.getIpAddressBinaryFromInetAddress(finalSourceAddress));
  72             transportAddressBuilder.setPort(new PortNumber(LispMessage.PORT_NUM));
  73             requestMappingBuilder.setTransportAddress(transportAddressBuilder.build());
  74             lispSbPlugin.sendNotificationIfPossible(requestMappingBuilder.build());
  75         } catch (RuntimeException re) {
  76             throw new LispMalformedPacketException(
  77                     "Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
  78         } catch (InterruptedException e) {
  79             LOG.warn("Notification publication interrupted!");
  80         }
  81     }
  82
  83     @SuppressWarnings("checkstyle:IllegalCatch")
  84     private void handleMapReply(ByteBuffer buffer) {
  85         try {
  86             MapReply reply = MapReplySerializer.getInstance().deserialize(buffer);
  87
  88             XtrReplyMappingBuilder replyMappingBuilder = new XtrReplyMappingBuilder();
  89             replyMappingBuilder.setMapReply(LispNotificationHelper.convertMapReply(reply));
  90             lispSbPlugin.sendNotificationIfPossible(replyMappingBuilder.build());
  91         } catch (RuntimeException re) {
  92             throw new LispMalformedPacketException(
  93                     "Couldn't deserialize Map-Reply (len=" + buffer.capacity() + ")", re);
  94         } catch (InterruptedException e) {
  95             LOG.warn("Notification publication interrupted!");
  96         }
  97     }
  98
  99     @Override
 100     protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) throws Exception {
 101         if (LOG.isTraceEnabled()) {
 102             LOG.trace("Received xTR UDP packet from {}:{} with content:\n{}", msg.sender().getHostString(),
 103                     msg.sender().getPort(), ByteBufUtil.prettyHexDump(msg.content()));
 104         }
 105         handlePacket(msg);
 106     }
 107
 108     @Override
 109     public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
 110         ctx.flush();
 111     }
 112
 113     @Override
 114     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
 115         LOG.error("Error on channel: " + cause, cause);
 116     }
 117 }