2 * Copyright (c) 2014 Contextream, Inc. and others. All rights reserved.
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
9 package org.opendaylight.lispflowmapping.southbound.lisp;
11 import java.net.DatagramPacket;
12 import java.net.InetAddress;
13 import java.nio.ByteBuffer;
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;
34 public class LispSouthboundService implements ILispSouthboundService {
35 private NotificationProviderService notificationProvider;
36 protected static final Logger LOG = LoggerFactory.getLogger(LispSouthboundService.class);
38 public void setNotificationProvider(NotificationProviderService nps) {
39 this.notificationProvider = nps;
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());
56 LOG.warn("Received unknown LISP control packet (type " + ((lispType != null) ? lispType : type) + ")");
57 LOG.trace("Buffer: " + ByteUtil.bytesToHex(packet.getData(), packet.getLength()));
61 private void handleEncapsulatedControlMessage(ByteBuffer inBuffer, InetAddress sourceAddress) {
63 handleMapRequest(inBuffer, extractEncapsulatedSourcePort(inBuffer));
64 } catch (RuntimeException re) {
65 throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
69 private void handleMapRequest(ByteBuffer inBuffer, int port) {
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!");
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!");
87 LOG.warn("Notification Provider is null!");
89 } catch (RuntimeException re) {
90 throw new LispMalformedPacketException("Couldn't deserialize Map-Request (len=" + inBuffer.capacity() + ")", re);
94 private int extractEncapsulatedSourcePort(ByteBuffer inBuffer) {
96 inBuffer.position(PacketHeader.Length.LISP_ENCAPSULATION);
97 int ipType = (inBuffer.get() >> 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);
103 throw new LispMalformedPacketException("Couldn't deserialize Map-Request: inner packet has unknown IP version: " + ipType);
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);
114 private void handleMapRegister(ByteBuffer inBuffer, InetAddress sourceAddress, int port) {
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!");
127 LOG.warn("Notification Provider is null!");
129 } catch (RuntimeException re) {
130 throw new LispMalformedPacketException("Couldn't deserialize Map-Register (len=" + inBuffer.capacity() + ")", re);