openflowplugin/src/main/java/org/opendaylight/openflowplugin/openflow/md/core/ConnectionConductorImpl.java

   1 /**
   2  * Copyright (c) 2013 Cisco Systems, 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.openflowplugin.openflow.md.core;
  10
  11 import java.util.concurrent.ExecutorService;
  12 import java.util.concurrent.Executors;
  13 import java.util.concurrent.Future;
  14 import java.util.concurrent.TimeUnit;
  15
  16 import org.opendaylight.openflowjava.protocol.api.connection.ConnectionAdapter;
  17 import org.opendaylight.openflowjava.protocol.api.connection.ConnectionReadyListener;
  18 import org.opendaylight.openflowplugin.openflow.md.OFConstants;
  19 import org.opendaylight.openflowplugin.openflow.md.core.session.OFSessionUtil;
  20 import org.opendaylight.openflowplugin.openflow.md.core.session.PortFeaturesUtil;
  21 import org.opendaylight.openflowplugin.openflow.md.core.session.SessionContext;
  22 import org.opendaylight.openflowplugin.openflow.md.core.session.SessionManager;
  23 import org.opendaylight.openflowplugin.openflow.md.queue.QueueKeeper;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.MultipartRequestFlags;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.MultipartType;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoInputBuilder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutput;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoReplyInputBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoRequestMessage;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterMessage;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowRemovedMessage;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.GetFeaturesOutput;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReplyMessage;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartRequestInputBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OpenflowProtocolListener;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.Port;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatus;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatusMessage;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestDescCaseBuilder;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestGroupFeaturesCaseBuilder;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestMeterFeaturesCaseBuilder;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestPortDescCaseBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.DisconnectEvent;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SystemNotificationsListener;
  50 import org.opendaylight.yangtools.yang.binding.DataObject;
  51 import org.opendaylight.yangtools.yang.common.RpcError;
  52 import org.opendaylight.yangtools.yang.common.RpcResult;
  53 import org.slf4j.Logger;
  54 import org.slf4j.LoggerFactory;
  55
  56 import com.google.common.util.concurrent.Futures;
  57
  58 /**
  59  * @author mirehak
  60  */
  61 public class ConnectionConductorImpl implements OpenflowProtocolListener,
  62         SystemNotificationsListener, ConnectionConductor, ConnectionReadyListener, HandshakeListener {
  63
  64     protected static final Logger LOG = LoggerFactory
  65             .getLogger(ConnectionConductorImpl.class);
  66
  67     /* variable to make BitMap-based negotiation enabled / disabled.
  68      * it will help while testing and isolating issues related to processing of
  69      * BitMaps from switches.
  70      */
  71     private boolean isBitmapNegotiationEnable = true;
  72     protected ErrorHandler errorHandler;
  73
  74     private final ConnectionAdapter connectionAdapter;
  75     private ConnectionConductor.CONDUCTOR_STATE conductorState;
  76     private Short version;
  77
  78     private SwitchConnectionDistinguisher auxiliaryKey;
  79
  80     private SessionContext sessionContext;
  81
  82     private QueueKeeper<OfHeader, DataObject> queueKeeper;
  83     private ExecutorService hsPool;
  84     private HandshakeManager handshakeManager;
  85
  86     private boolean firstHelloProcessed;
  87
  88     private PortFeaturesUtil portFeaturesUtils;
  89
  90     /**
  91      * @param connectionAdapter
  92      */
  93     public ConnectionConductorImpl(ConnectionAdapter connectionAdapter) {
  94         this.connectionAdapter = connectionAdapter;
  95         conductorState = CONDUCTOR_STATE.HANDSHAKING;
  96         hsPool = Executors.newFixedThreadPool(1);
  97         firstHelloProcessed = false;
  98         handshakeManager = new HandshakeManagerImpl(connectionAdapter,
  99                 ConnectionConductor.versionOrder.get(0), ConnectionConductor.versionOrder);
 100         handshakeManager.setUseVersionBitmap(isBitmapNegotiationEnable);
 101         handshakeManager.setHandshakeListener(this);
 102         portFeaturesUtils = PortFeaturesUtil.getInstance();
 103     }
 104
 105     @Override
 106     public void init() {
 107         connectionAdapter.setMessageListener(this);
 108         connectionAdapter.setSystemListener(this);
 109         connectionAdapter.setConnectionReadyListener(this);
 110     }
 111
 112     @Override
 113     public void setQueueKeeper(QueueKeeper<OfHeader, DataObject> queueKeeper) {
 114         this.queueKeeper = queueKeeper;
 115     }
 116
 117     /**
 118      * @param errorHandler the errorHandler to set
 119      */
 120     @Override
 121     public void setErrorHandler(ErrorHandler errorHandler) {
 122         this.errorHandler = errorHandler;
 123         handshakeManager.setErrorHandler(errorHandler);
 124     }
 125
 126     @Override
 127     public void onEchoRequestMessage(final EchoRequestMessage echoRequestMessage) {
 128         new Thread(new Runnable() {
 129             @Override
 130             public void run() {
 131                 LOG.debug("echo request received: " + echoRequestMessage.getXid());
 132                 EchoReplyInputBuilder builder = new EchoReplyInputBuilder();
 133                 builder.setVersion(echoRequestMessage.getVersion());
 134                 builder.setXid(echoRequestMessage.getXid());
 135                 builder.setData(echoRequestMessage.getData());
 136
 137                 getConnectionAdapter().echoReply(builder.build());
 138             }
 139         }).start();
 140     }
 141
 142     @Override
 143     public void onErrorMessage(ErrorMessage errorMessage) {
 144         queueKeeper.push(errorMessage, this);
 145     }
 146
 147     @Override
 148     public void onExperimenterMessage(ExperimenterMessage experimenterMessage) {
 149         queueKeeper.push(experimenterMessage, this);
 150     }
 151
 152     @Override
 153     public void onFlowRemovedMessage(FlowRemovedMessage message) {
 154         queueKeeper.push(message, this);
 155     }
 156
 157
 158     /**
 159      * version negotiation happened as per following steps:
 160      * 1. If HelloMessage version field has same version, continue connection processing.
 161      *    If HelloMessage version is lower than supported versions, just disconnect.
 162      * 2. If HelloMessage contains bitmap and common version found in bitmap
 163      *    then continue connection processing. if no common version found, just disconnect.
 164      * 3. If HelloMessage version is not supported, send HelloMessage with lower supported version.
 165      * 4. If Hello message received again with not supported version, just disconnect.
 166      *
 167      *   TODO: Better to handle handshake into a maintainable innerclass which uses State-Pattern.
 168      */
 169     @Override
 170     public synchronized void onHelloMessage(final HelloMessage hello) {
 171         LOG.debug("processing HELLO.xid: {}", hello.getXid());
 172         firstHelloProcessed = true;
 173         checkState(CONDUCTOR_STATE.HANDSHAKING);
 174         HandshakeStepWrapper handshakeStepWrapper = new HandshakeStepWrapper(
 175                 hello, handshakeManager, connectionAdapter);
 176         hsPool.execute(handshakeStepWrapper);
 177     }
 178
 179     /**
 180      * @return rpc-response timeout in [ms]
 181      */
 182     protected long getMaxTimeout() {
 183         // TODO:: get from configuration
 184         return 2000;
 185     }
 186
 187     /**
 188      * @return milliseconds
 189      */
 190     protected TimeUnit getMaxTimeoutUnit() {
 191         // TODO:: get from configuration
 192         return TimeUnit.MILLISECONDS;
 193     }
 194
 195     @Override
 196     public void onMultipartReplyMessage(MultipartReplyMessage message) {
 197         queueKeeper.push(message, this);
 198     }
 199
 200     @Override
 201     public void onPacketInMessage(PacketInMessage message) {
 202         queueKeeper.push(message, this, QueueKeeper.QueueType.UNORDERED);
 203     }
 204
 205     @Override
 206     public void onPortStatusMessage(PortStatusMessage message) {
 207         processPortStatusMsg(message);
 208         queueKeeper.push(message, this);
 209     }
 210
 211     protected void processPortStatusMsg(PortStatus msg) {
 212         if (msg.getReason().getIntValue() == 2) {
 213             updatePort(msg);
 214         } else if (msg.getReason().getIntValue() == 0) {
 215             updatePort(msg);
 216         } else if (msg.getReason().getIntValue() == 1) {
 217             deletePort(msg);
 218         }
 219     }
 220
 221     protected void updatePort(PortStatus msg) {
 222         Long portNumber = msg.getPortNo();
 223         Boolean portBandwidth = portFeaturesUtils.getPortBandwidth(msg);
 224
 225         if(portBandwidth == null) {
 226             LOG.warn("can't get bandwidth info from port: {}, aborting port update", msg.toString());
 227         } else {
 228             this.getSessionContext().getPhysicalPorts().put(portNumber, msg);
 229             this.getSessionContext().getPortsBandwidth().put(portNumber, portBandwidth);
 230         }
 231     }
 232
 233     protected void deletePort(Port port) {
 234         Long portNumber = port.getPortNo();
 235
 236         this.getSessionContext().getPhysicalPorts().remove(portNumber);
 237         this.getSessionContext().getPortsBandwidth().remove(portNumber);
 238     }
 239
 240     @Override
 241     public void onSwitchIdleEvent(SwitchIdleEvent notification) {
 242         new Thread(new Runnable() {
 243             @Override
 244             public void run() {
 245                 if (!CONDUCTOR_STATE.WORKING.equals(getConductorState())) {
 246                     // idle state in any other conductorState than WORKING means real
 247                     // problem and wont be handled by echoReply, but disconnection
 248                     disconnect();
 249                     OFSessionUtil.getSessionManager().invalidateOnDisconnect(ConnectionConductorImpl.this);
 250                 } else {
 251                     LOG.debug("first idle state occured");
 252                     EchoInputBuilder builder = new EchoInputBuilder();
 253                     builder.setVersion(getVersion());
 254                     builder.setXid(getSessionContext().getNextXid());
 255
 256                     Future<RpcResult<EchoOutput>> echoReplyFuture = getConnectionAdapter()
 257                             .echo(builder.build());
 258
 259                     try {
 260                         RpcResult<EchoOutput> echoReplyValue = echoReplyFuture.get(getMaxTimeout(),
 261                                 getMaxTimeoutUnit());
 262                         if (echoReplyValue.isSuccessful()) {
 263                             setConductorState(CONDUCTOR_STATE.WORKING);
 264                         } else {
 265                             for (RpcError replyError : echoReplyValue.getErrors()) {
 266                                 Throwable cause = replyError.getCause();
 267                                 LOG.error(
 268                                         "while receiving echoReply in TIMEOUTING state: "
 269                                                 + cause.getMessage(), cause);
 270                             }
 271                             //switch issue occurred
 272                             throw new Exception("switch issue occurred");
 273                         }
 274                     } catch (Exception e) {
 275                         LOG.error("while waiting for echoReply in TIMEOUTING state: "
 276                                 + e.getMessage());
 277                         errorHandler.handleException(e, sessionContext);
 278                         //switch is not responding
 279                         disconnect();
 280                         OFSessionUtil.getSessionManager().invalidateOnDisconnect(ConnectionConductorImpl.this);
 281                     }
 282                 }
 283             }
 284
 285         }).start();
 286     }
 287
 288     /**
 289      * @param conductorState
 290      *            the connectionState to set
 291      */
 292     @Override
 293     public void setConductorState(CONDUCTOR_STATE conductorState) {
 294         this.conductorState = conductorState;
 295     }
 296
 297     @Override
 298     public CONDUCTOR_STATE getConductorState() {
 299         return conductorState;
 300     }
 301
 302     /**
 303      * @param handshaking
 304      */
 305     protected void checkState(CONDUCTOR_STATE expectedState) {
 306         if (!conductorState.equals(expectedState)) {
 307             throw new IllegalStateException("Expected state: " + expectedState
 308                     + ", actual state:" + conductorState);
 309         }
 310     }
 311
 312     @Override
 313     public void onDisconnectEvent(DisconnectEvent arg0) {
 314         SessionManager sessionManager = OFSessionUtil.getSessionManager();
 315         sessionManager.invalidateOnDisconnect(this);
 316     }
 317
 318     @Override
 319     public Short getVersion() {
 320         return version;
 321     }
 322
 323     @Override
 324     public Future<Boolean> disconnect() {
 325         LOG.info("disconnecting: sessionCtx="+sessionContext+"|auxId="+auxiliaryKey);
 326
 327         Future<Boolean> result = null;
 328         if (connectionAdapter.isAlive()) {
 329             result = connectionAdapter.disconnect();
 330         } else {
 331             LOG.debug("connection already disconnected");
 332             result = Futures.immediateFuture(true);
 333         }
 334
 335         return result;
 336     }
 337
 338     @Override
 339     public void setConnectionCookie(SwitchConnectionDistinguisher auxiliaryKey) {
 340         this.auxiliaryKey = auxiliaryKey;
 341     }
 342
 343     @Override
 344     public void setSessionContext(SessionContext sessionContext) {
 345         this.sessionContext = sessionContext;
 346     }
 347
 348     @Override
 349     public SwitchConnectionDistinguisher getAuxiliaryKey() {
 350         return auxiliaryKey;
 351     }
 352
 353     @Override
 354     public SessionContext getSessionContext() {
 355         return sessionContext;
 356     }
 357
 358     @Override
 359     public ConnectionAdapter getConnectionAdapter() {
 360         return connectionAdapter;
 361     }
 362
 363     @Override
 364     public synchronized void onConnectionReady() {
 365         LOG.debug("connection is ready-to-use");
 366         if (! firstHelloProcessed) {
 367             HandshakeStepWrapper handshakeStepWrapper = new HandshakeStepWrapper(
 368                     null, handshakeManager, connectionAdapter);
 369             hsPool.execute(handshakeStepWrapper);
 370             firstHelloProcessed = true;
 371         } else {
 372             LOG.debug("already touched by hello message");
 373         }
 374     }
 375
 376     @Override
 377     public void onHandshakeSuccessfull(GetFeaturesOutput featureOutput,
 378             Short negotiatedVersion) {
 379         version = negotiatedVersion;
 380         conductorState = CONDUCTOR_STATE.WORKING;
 381         OFSessionUtil.registerSession(this, featureOutput, negotiatedVersion);
 382         requestDesc();
 383         requestPorts();
 384         if(version == OFConstants.OFP_VERSION_1_3){
 385             requestGroupFeatures();
 386             requestMeterFeatures();
 387         }
 388     }
 389
 390     /*
 391      *  Send an OFPMP_DESC request message to the switch
 392      */
 393
 394     private void requestDesc() {
 395         MultipartRequestInputBuilder builder = new MultipartRequestInputBuilder();
 396         builder.setType(MultipartType.OFPMPDESC);
 397         builder.setVersion(getVersion());
 398         builder.setFlags(new MultipartRequestFlags(false));
 399         builder.setMultipartRequestBody(new MultipartRequestDescCaseBuilder().build());
 400         builder.setXid(getSessionContext().getNextXid());
 401         getConnectionAdapter().multipartRequest(builder.build());
 402     }
 403
 404     private void requestPorts() {
 405         MultipartRequestInputBuilder builder = new MultipartRequestInputBuilder();
 406         builder.setType(MultipartType.OFPMPPORTDESC);
 407         builder.setVersion(getVersion());
 408         builder.setFlags(new MultipartRequestFlags(false));
 409         builder.setMultipartRequestBody(new MultipartRequestPortDescCaseBuilder().build());
 410         builder.setXid(getSessionContext().getNextXid());
 411         getConnectionAdapter().multipartRequest(builder.build());
 412     }
 413     private void requestGroupFeatures(){
 414         MultipartRequestInputBuilder mprInput = new MultipartRequestInputBuilder();
 415         mprInput.setType(MultipartType.OFPMPGROUPFEATURES);
 416         mprInput.setVersion(getVersion());
 417         mprInput.setFlags(new MultipartRequestFlags(false));
 418         mprInput.setXid(getSessionContext().getNextXid());
 419
 420         MultipartRequestGroupFeaturesCaseBuilder mprGroupFeaturesBuild =
 421                 new MultipartRequestGroupFeaturesCaseBuilder();
 422         mprInput.setMultipartRequestBody(mprGroupFeaturesBuild.build());
 423
 424         LOG.debug("Send group features statistics request :{}",mprGroupFeaturesBuild);
 425         getConnectionAdapter().multipartRequest(mprInput.build());
 426
 427     }
 428     private void requestMeterFeatures(){
 429         MultipartRequestInputBuilder mprInput = new MultipartRequestInputBuilder();
 430         mprInput.setType(MultipartType.OFPMPMETERFEATURES);
 431         mprInput.setVersion(getVersion());
 432         mprInput.setFlags(new MultipartRequestFlags(false));
 433         mprInput.setXid(getSessionContext().getNextXid());
 434
 435         MultipartRequestMeterFeaturesCaseBuilder mprMeterFeaturesBuild =
 436                 new MultipartRequestMeterFeaturesCaseBuilder();
 437         mprInput.setMultipartRequestBody(mprMeterFeaturesBuild.build());
 438
 439         LOG.debug("Send meter features statistics request :{}",mprMeterFeaturesBuild);
 440         getConnectionAdapter().multipartRequest(mprInput.build());
 441
 442     }
 443     /**
 444      * @param isBitmapNegotiationEnable the isBitmapNegotiationEnable to set
 445      */
 446     public void setBitmapNegotiationEnable(
 447             boolean isBitmapNegotiationEnable) {
 448         this.isBitmapNegotiationEnable = isBitmapNegotiationEnable;
 449     }
 450
 451     protected void shutdownPool() {
 452         hsPool.shutdownNow();
 453         LOG.debug("pool is terminated: {}", hsPool.isTerminated());
 454     }
 455 }