mappingservice/southbound/src/main/java/org/opendaylight/lispflowmapping/southbound/LispSouthboundPlugin.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;
  10
  11 import java.io.IOException;
  12 import java.net.DatagramPacket;
  13 import java.net.DatagramSocket;
  14 import java.net.InetAddress;
  15 import java.net.InetSocketAddress;
  16 import java.net.SocketException;
  17 import java.net.SocketTimeoutException;
  18 import java.nio.ByteBuffer;
  19 import java.util.concurrent.Future;
  20
  21 import org.eclipse.osgi.framework.console.CommandProvider;
  22 import org.opendaylight.controller.sal.binding.api.AbstractBindingAwareProvider;
  23 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  24 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  25 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessage;
  26 import org.opendaylight.lispflowmapping.implementation.serializer.MapNotifySerializer;
  27 import org.opendaylight.lispflowmapping.implementation.serializer.MapReplySerializer;
  28 import org.opendaylight.lispflowmapping.implementation.serializer.MapRequestSerializer;
  29 import org.opendaylight.lispflowmapping.southbound.lisp.ILispSouthboundService;
  30 import org.opendaylight.lispflowmapping.southbound.lisp.LispSouthboundService;
  31 import org.opendaylight.lispflowmapping.southbound.lisp.LispXtrSouthboundService;
  32 import org.opendaylight.lispflowmapping.type.sbplugin.IConfigLispPlugin;
  33 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.LispflowmappingService;
  34 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.SendMapNotifyInput;
  35 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.SendMapReplyInput;
  36 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.SendMapRequestInput;
  37 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.SetXtrPortInput;
  38 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.ShouldListenOnXtrPortInput;
  39 import org.opendaylight.yang.gen.v1.lispflowmapping.rev131031.transportaddress.TransportAddress;
  40 import org.opendaylight.yangtools.yang.common.RpcResult;
  41 import org.osgi.framework.BundleContext;
  42 import org.osgi.framework.FrameworkUtil;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 import com.google.common.net.InetAddresses;
  47
  48 public class LispSouthboundPlugin extends AbstractBindingAwareProvider implements IConfigLispPlugin, CommandProvider, LispflowmappingService {
  49     protected static final Logger logger = LoggerFactory.getLogger(LispSouthboundPlugin.class);
  50
  51     private static Object startLock = new Object();
  52     private LispIoThread lispThread;
  53     private LispIoThread xtrThread;
  54     private LispSouthboundService lispSouthboundService;
  55     private LispXtrSouthboundService lispXtrSouthboundService;
  56     private volatile DatagramSocket socket = null;
  57     private final String MAP_NOTIFY = "MapNotify";
  58     private final String MAP_REPlY = "MapReply";
  59     private final String MAP_REQUEST = "MapRequest";
  60     private volatile String bindingAddress = null;
  61     private volatile boolean alreadyInit = false;
  62     private volatile int xtrPort = LispMessage.XTR_PORT_NUM;
  63     private volatile boolean listenOnXtrPort = false;
  64
  65     private DatagramSocket xtrSocket;
  66
  67     private void registerWithOSGIConsole() {
  68         BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass()).getBundleContext();
  69         bundleContext.registerService(CommandProvider.class.getName(), this, null);
  70         bundleContext.registerService(IConfigLispPlugin.class.getName(), this, null);
  71     }
  72
  73     protected void stopImpl(BundleContext context) {
  74         unloadActions();
  75     }
  76
  77     private void unloadActions() {
  78         if (lispThread != null) {
  79             lispThread.stopRunning();
  80         }
  81         lispSouthboundService = null;
  82         lispXtrSouthboundService = null;
  83         lispThread = null;
  84         xtrThread = null;
  85         logger.info("LISP (RFC6830) Mapping Service is down!");
  86         try {
  87             Thread.sleep(1100);
  88         } catch (InterruptedException e) {
  89         }
  90     }
  91
  92     public void destroy() {
  93         unloadActions();
  94     }
  95
  96     private class LispIoThread extends Thread {
  97         private volatile boolean shouldRun;
  98         private volatile DatagramSocket threadSocket = null;
  99         private volatile ILispSouthboundService service;
 100         private volatile boolean running;
 101
 102         public LispIoThread(DatagramSocket socket, ILispSouthboundService service) {
 103             super("Lisp Thread");
 104             this.threadSocket = socket;
 105             this.service = service;
 106             shouldRun = true;
 107         }
 108
 109         @Override
 110         public void run() {
 111             running = true;
 112
 113             int lispReceiveTimeout = 1000;
 114
 115             logger.info("LISP (RFC6830) Mapping Service is running and listening on address: " + bindingAddress + " port: "
 116                     + threadSocket.getLocalPort());
 117             try {
 118
 119                 threadSocket.setSoTimeout(lispReceiveTimeout);
 120             } catch (SocketException e) {
 121                 logger.error("Cannot open socket on UDP port " + threadSocket.getLocalPort(), e);
 122                 return;
 123             }
 124
 125             while (shouldRun) {
 126                 byte[] buffer = new byte[4096];
 127                 DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
 128                 try {
 129                     threadSocket.receive(packet);
 130                     logger.trace("Received a packet!");
 131                 } catch (SocketTimeoutException ste) {
 132                     continue;
 133                 } catch (IOException e) {
 134                     logger.warn("IO Exception while trying to recieve packet", e);
 135                 }
 136                 logger.trace(String.format("Handling packet from {%s}:{%d} (len={%d})", packet.getAddress().getHostAddress(), packet.getPort(),
 137                         packet.getLength()));
 138
 139                 try {
 140                     this.service.handlePacket(packet);
 141                 } catch (Throwable t) {
 142                     logger.warn("Error while handling packet", t);
 143                 }
 144             }
 145
 146             threadSocket.close();
 147             logger.trace("Socket closed");
 148             running = false;
 149         }
 150
 151         public void stopRunning() {
 152             shouldRun = false;
 153         }
 154
 155         public boolean isRunning() {
 156             return running;
 157         }
 158     }
 159
 160     public static String intToIpv4(int address) {
 161         return ((address >> 24) & 0xff) + "." + //
 162                 ((address >> 16) & 0xff) + "." + //
 163                 ((address >> 8) & 0xff) + "." + //
 164                 ((address >> 0) & 0xff);
 165     }
 166
 167     public String getHelp() {
 168         StringBuffer help = new StringBuffer();
 169         help.append("---LISP Southbound Plugin---\n");
 170         return help.toString();
 171     }
 172
 173     private void startIOThread() {
 174         try {
 175             socket = new DatagramSocket(new InetSocketAddress(bindingAddress, LispMessage.PORT_NUM));
 176             lispThread = new LispIoThread(socket, lispSouthboundService);
 177             lispThread.start();
 178             logger.info("LISP (RFC6830) Mapping Service Southbound Plugin is up!");
 179             if (listenOnXtrPort) {
 180                 restartXtrThread();
 181             }
 182         } catch (SocketException e) {
 183             logger.error("couldn't start socket {}", e.getMessage());
 184             e.printStackTrace();
 185         }
 186     }
 187
 188     private void restartXtrThread() {
 189         try {
 190             stopXtrThread();
 191             xtrSocket = new DatagramSocket(new InetSocketAddress(bindingAddress, xtrPort));
 192             xtrThread = new LispIoThread(xtrSocket, lispXtrSouthboundService);
 193             xtrThread.start();
 194             logger.info("xTR Southbound Plugin is up!");
 195         } catch (SocketException e) {
 196             logger.warn("failed to start xtr thread: {}", e.getMessage());
 197         }
 198     }
 199
 200     public void onSessionInitiated(ProviderContext session) {
 201         logger.info("LISP (RFC6830) Mapping Service is up!");
 202         synchronized (startLock) {
 203             if (!alreadyInit) {
 204                 alreadyInit = true;
 205                 lispSouthboundService = new LispSouthboundService();
 206                 lispXtrSouthboundService = new LispXtrSouthboundService();
 207                 registerWithOSGIConsole();
 208                 registerRPCs(session);
 209                 logger.trace("Provider Session initialized");
 210                 if (bindingAddress == null) {
 211                     setLispAddress("0.0.0.0");
 212                 }
 213             }
 214
 215         }
 216     }
 217
 218     private void registerRPCs(ProviderContext session) {
 219         try {
 220             lispSouthboundService.setNotificationProvider(session.getSALService(NotificationProviderService.class));
 221             lispXtrSouthboundService.setNotificationProvider(session.getSALService(NotificationProviderService.class));
 222             session.addRpcImplementation(LispflowmappingService.class, this);
 223         } catch (Throwable t) {
 224             logger.error(t.getMessage(), t);
 225         }
 226     }
 227
 228     private void handleSerializedLispBuffer(TransportAddress address, ByteBuffer outBuffer, String packetType) {
 229         DatagramPacket packet = new DatagramPacket(outBuffer.array(), outBuffer.limit());
 230         packet.setPort(address.getPort().getValue());
 231         InetAddress ip = InetAddresses.forString(address.getIpAddress().getIpv4Address().getValue());
 232         packet.setAddress(ip);
 233         try {
 234             if (logger.isDebugEnabled()) {
 235                 logger.trace("Sending " + packetType + " on port " + address.getPort().getValue() + " to address: " + ip);
 236             }
 237             socket.send(packet);
 238         } catch (IOException e) {
 239             logger.warn("Failed to send " + packetType, e);
 240         }
 241     }
 242
 243     public void setLispAddress(String address) {
 244         synchronized (startLock) {
 245             if (bindingAddress != null && bindingAddress.equals(address)) {
 246                 logger.trace("configured lisp binding address didn't change.");
 247             } else {
 248                 String action = (bindingAddress == null ? "Setting" : "Resetting");
 249                 logger.trace(action + " lisp binding address to: " + address);
 250                 bindingAddress = address;
 251                 if (lispThread != null) {
 252                     lispThread.stopRunning();
 253                     while (lispThread.isRunning()) {
 254                         try {
 255                             Thread.sleep(500);
 256                         } catch (InterruptedException e) {
 257                         }
 258                     }
 259                 }
 260                 stopXtrThread();
 261                 startIOThread();
 262             }
 263         }
 264     }
 265
 266     private void stopXtrThread() {
 267         if (xtrThread != null) {
 268             xtrThread.stopRunning();
 269             while (xtrThread.isRunning()) {
 270                 try {
 271                     Thread.sleep(500);
 272                 } catch (InterruptedException e) {
 273                 }
 274             }
 275         }
 276     }
 277
 278     @Override
 279     public Future<RpcResult<Void>> sendMapNotify(SendMapNotifyInput mapNotifyInput) {
 280         logger.trace("sendMapNotify called!!");
 281         if (mapNotifyInput != null) {
 282             ByteBuffer outBuffer = MapNotifySerializer.getInstance().serialize(mapNotifyInput.getMapNotify());
 283             handleSerializedLispBuffer(mapNotifyInput.getTransportAddress(), outBuffer, MAP_NOTIFY);
 284         } else {
 285             logger.warn("MapNotify was null");
 286         }
 287         return null;
 288     }
 289
 290     @Override
 291     public Future<RpcResult<Void>> sendMapReply(SendMapReplyInput mapReplyInput) {
 292         logger.trace("sendMapReply called!!");
 293         if (mapReplyInput != null) {
 294             ByteBuffer outBuffer = MapReplySerializer.getInstance().serialize(mapReplyInput.getMapReply());
 295             handleSerializedLispBuffer(mapReplyInput.getTransportAddress(), outBuffer, MAP_REPlY);
 296         } else {
 297             logger.warn("MapReply was null");
 298         }
 299         return null;
 300     }
 301
 302     @Override
 303     public Future<RpcResult<Void>> sendMapRequest(SendMapRequestInput mapRequestInput) {
 304         logger.trace("sendMapRequest called!!");
 305         if (mapRequestInput != null) {
 306             ByteBuffer outBuffer = MapRequestSerializer.getInstance().serialize(mapRequestInput.getMapRequest());
 307             handleSerializedLispBuffer(mapRequestInput.getTransportAddress(), outBuffer, MAP_REQUEST);
 308         } else {
 309             logger.debug("MapRequest was null");
 310         }
 311         return null;
 312     }
 313
 314     @Override
 315     public Future<RpcResult<Void>> shouldListenOnXtrPort(ShouldListenOnXtrPortInput input) {
 316         logger.debug("got a call to shouldListenOnXtrPort");
 317         if (listenOnXtrPort == input.isShouldListenOnXtrPort()) {
 318             logger.debug("no action done, ond and new value are identical, " + listenOnXtrPort);
 319             return null;
 320         }
 321         listenOnXtrPort = input.isShouldListenOnXtrPort();
 322         if (listenOnXtrPort) {
 323             logger.debug("restarting xtr thread");
 324             restartXtrThread();
 325         } else {
 326             logger.debug("terminating thread");
 327             stopXtrThread();
 328         }
 329         return null;
 330     }
 331
 332     @Override
 333     public Future<RpcResult<Void>> setXtrPort(SetXtrPortInput input) {
 334         this.xtrPort = input.getXtrPort().getValue();
 335         if (listenOnXtrPort) {
 336             restartXtrThread();
 337         }
 338         return null;
 339     }
 340 }