openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/core/connection/ConnectionAdapterImpl.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. 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
  10 package org.opendaylight.openflowjava.protocol.impl.core.connection;
  11
  12 import com.google.common.base.Preconditions;
  13 import io.netty.channel.Channel;
  14 import java.net.InetSocketAddress;
  15 import org.opendaylight.openflowjava.protocol.api.connection.ConnectionReadyListener;
  16 import org.opendaylight.openflowjava.protocol.api.connection.OutboundQueueHandler;
  17 import org.opendaylight.openflowjava.protocol.api.connection.OutboundQueueHandlerRegistration;
  18 import org.opendaylight.openflowjava.protocol.impl.core.OFVersionDetector;
  19 import org.opendaylight.openflowjava.protocol.impl.core.PipelineHandlers;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoRequestMessage;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ErrorMessage;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.ExperimenterMessage;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FlowRemovedMessage;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReplyMessage;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OpenflowProtocolListener;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PortStatusMessage;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.DisconnectEvent;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SwitchIdleEvent;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.system.rev130927.SystemNotificationsListener;
  33 import org.opendaylight.yangtools.yang.binding.DataObject;
  34 import org.opendaylight.yangtools.yang.binding.Notification;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 /**
  39  * Handles messages (notifications + rpcs) and connections
  40  * @author mirehak
  41  * @author michal.polkorab
  42  */
  43 public class ConnectionAdapterImpl extends AbstractConnectionAdapterStatistics implements ConnectionFacade {
  44
  45     private static final Logger LOG = LoggerFactory.getLogger(ConnectionAdapterImpl.class);
  46
  47     private ConnectionReadyListener connectionReadyListener;
  48     private OpenflowProtocolListener messageListener;
  49     private SystemNotificationsListener systemListener;
  50     private AbstractOutboundQueueManager<?, ?> outputManager;
  51     private OFVersionDetector versionDetector;
  52
  53     private final boolean useBarrier;
  54
  55     /**
  56      * default ctor
  57      *
  58      * @param channel the channel to be set - used for communication
  59      * @param address client address (used only in case of UDP communication,
  60      *            as there is no need to store address over tcp (stable channel))
  61      * @param useBarrier value is configurable by configSubsytem
  62      */
  63     public ConnectionAdapterImpl(final Channel channel, final InetSocketAddress address, final boolean useBarrier) {
  64         super(channel, address);
  65         this.useBarrier = useBarrier;
  66         LOG.debug("ConnectionAdapter created");
  67     }
  68
  69     @Override
  70     public void setMessageListener(final OpenflowProtocolListener messageListener) {
  71         this.messageListener = messageListener;
  72     }
  73
  74     @Override
  75     public void setConnectionReadyListener(final ConnectionReadyListener connectionReadyListener) {
  76         this.connectionReadyListener = connectionReadyListener;
  77     }
  78
  79     @Override
  80     public void setSystemListener(final SystemNotificationsListener systemListener) {
  81         this.systemListener = systemListener;
  82     }
  83
  84     @Override
  85     public void consumeDeviceMessage(final DataObject message) {
  86         LOG.debug("ConsumeIntern msg on {}", channel);
  87         if (disconnectOccured ) {
  88             return;
  89         }
  90         if (message instanceof Notification) {
  91
  92             // System events
  93             if (message instanceof DisconnectEvent) {
  94                 systemListener.onDisconnectEvent((DisconnectEvent) message);
  95                 responseCache.invalidateAll();
  96                 disconnectOccured = true;
  97             } else if (message instanceof SwitchIdleEvent) {
  98                 systemListener.onSwitchIdleEvent((SwitchIdleEvent) message);
  99                 // OpenFlow messages
 100             } else if (message instanceof EchoRequestMessage) {
 101                 if (outputManager != null) {
 102                     outputManager.onEchoRequest((EchoRequestMessage) message);
 103                 } else {
 104                     messageListener.onEchoRequestMessage((EchoRequestMessage) message);
 105                 }
 106             } else if (message instanceof ErrorMessage) {
 107                 // Send only unmatched errors
 108                 if (outputManager == null || !outputManager.onMessage((OfHeader) message)) {
 109                     messageListener.onErrorMessage((ErrorMessage) message);
 110                 }
 111             } else if (message instanceof ExperimenterMessage) {
 112                 if (outputManager != null) {
 113                     outputManager.onMessage((OfHeader) message);
 114                 }
 115                 messageListener.onExperimenterMessage((ExperimenterMessage) message);
 116             } else if (message instanceof FlowRemovedMessage) {
 117                 messageListener.onFlowRemovedMessage((FlowRemovedMessage) message);
 118             } else if (message instanceof HelloMessage) {
 119                 LOG.info("Hello received / branch");
 120                 messageListener.onHelloMessage((HelloMessage) message);
 121             } else if (message instanceof MultipartReplyMessage) {
 122                 if (outputManager != null) {
 123                     outputManager.onMessage((OfHeader) message);
 124                 }
 125                 messageListener.onMultipartReplyMessage((MultipartReplyMessage) message);
 126             } else if (message instanceof PacketInMessage) {
 127                 messageListener.onPacketInMessage((PacketInMessage) message);
 128             } else if (message instanceof PortStatusMessage) {
 129                 messageListener.onPortStatusMessage((PortStatusMessage) message);
 130             } else {
 131                 LOG.warn("message listening not supported for type: {}", message.getClass());
 132             }
 133         } else if (message instanceof OfHeader) {
 134             LOG.debug("OFheader msg received");
 135
 136             if (outputManager == null || !outputManager.onMessage((OfHeader) message)) {
 137                 final RpcResponseKey key = createRpcResponseKey((OfHeader) message);
 138                 final ResponseExpectedRpcListener<?> listener = findRpcResponse(key);
 139                 if (listener != null) {
 140                     LOG.debug("corresponding rpcFuture found");
 141                     listener.completed((OfHeader)message);
 142                     LOG.debug("after setting rpcFuture");
 143                     responseCache.invalidate(key);
 144                 } else {
 145                     LOG.warn("received unexpected rpc response: {}", key);
 146                 }
 147             }
 148         } else {
 149             LOG.warn("message listening not supported for type: {}", message.getClass());
 150         }
 151     }
 152
 153     /**
 154      * @param message
 155      * @return
 156      */
 157     private static RpcResponseKey createRpcResponseKey(final OfHeader message) {
 158         return new RpcResponseKey(message.getXid(), message.getImplementedInterface().getName());
 159     }
 160
 161     @Override
 162     public void checkListeners() {
 163         final StringBuilder buffer =  new StringBuilder();
 164         if (systemListener == null) {
 165             buffer.append("SystemListener ");
 166         }
 167         if (messageListener == null) {
 168             buffer.append("MessageListener ");
 169         }
 170         if (connectionReadyListener == null) {
 171             buffer.append("ConnectionReadyListener ");
 172         }
 173
 174         Preconditions.checkState(buffer.length() == 0, "Missing listeners: %s", buffer.toString());
 175     }
 176
 177     @Override
 178     public void fireConnectionReadyNotification() {
 179         versionDetector = (OFVersionDetector) channel.pipeline().get(PipelineHandlers.OF_VERSION_DETECTOR.name());
 180         Preconditions.checkState(versionDetector != null);
 181
 182         new Thread(new Runnable() {
 183             @Override
 184             public void run() {
 185                 connectionReadyListener.onConnectionReady();
 186             }
 187         }).start();
 188     }
 189
 190     @Override
 191     public <T extends OutboundQueueHandler> OutboundQueueHandlerRegistration<T> registerOutboundQueueHandler(
 192             final T handler, final int maxQueueDepth, final long maxBarrierNanos) {
 193         Preconditions.checkState(outputManager == null, "Manager %s already registered", outputManager);
 194
 195         final AbstractOutboundQueueManager<T, ?> ret;
 196         if (useBarrier) {
 197             ret = new OutboundQueueManager<>(this, address, handler, maxQueueDepth, maxBarrierNanos);
 198         } else {
 199             LOG.warn("OutboundQueueManager without barrier is started.");
 200             ret = new OutboundQueueManagerNoBarrier<>(this, address, handler);
 201         }
 202
 203         outputManager = ret;
 204         /* we don't need it anymore */
 205         channel.pipeline().remove(output);
 206         channel.pipeline().addLast(outputManager);
 207
 208         return new OutboundQueueHandlerRegistrationImpl<T>(handler) {
 209             @Override
 210             protected void removeRegistration() {
 211                 outputManager.close();
 212                 channel.pipeline().remove(outputManager);
 213                 outputManager = null;
 214             }
 215         };
 216     }
 217
 218     Channel getChannel() {
 219         return channel;
 220     }
 221
 222     @Override
 223     public void setPacketInFiltering(final boolean enabled) {
 224         versionDetector.setFilterPacketIns(enabled);
 225         LOG.debug("PacketIn filtering {}abled", enabled ? "en" : "dis");
 226     }
 227 }