| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.openflow.controller.impl; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.packet.Ethernet.TYPE_BSN; |
| import static org.onlab.packet.Ethernet.TYPE_LLDP; |
| import static org.onlab.util.GroupedThreadFactory.groupedThreadFactory; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.openflow.controller.Dpid.uri; |
| |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.net.InetSocketAddress; |
| import java.net.SocketAddress; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.ClosedChannelException; |
| import java.security.cert.Certificate; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Deque; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.LinkedBlockingDeque; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.CopyOnWriteArraySet; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.locks.Condition; |
| import java.util.concurrent.locks.ReentrantLock; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import org.onlab.util.GroupedThreadFactory; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.onlab.osgi.DefaultServiceDirectory; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IpAddress; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.packet.DefaultInboundPacket; |
| import org.onosproject.openflow.controller.DefaultOpenFlowPacketContext; |
| import org.onosproject.openflow.controller.Dpid; |
| import org.onosproject.openflow.controller.OpenFlowClassifier; |
| import org.onosproject.openflow.controller.OpenFlowPacketContext; |
| import org.onosproject.openflow.controller.OpenFlowService; |
| import org.onosproject.openflow.controller.OpenFlowSession; |
| import org.onosproject.openflow.controller.driver.OpenFlowSwitchDriver; |
| import org.onosproject.openflow.controller.driver.SwitchStateException; |
| import org.projectfloodlight.openflow.exceptions.OFParseError; |
| import org.projectfloodlight.openflow.protocol.OFAsyncGetReply; |
| import org.projectfloodlight.openflow.protocol.OFBadRequestCode; |
| import org.projectfloodlight.openflow.protocol.OFBarrierReply; |
| import org.projectfloodlight.openflow.protocol.OFBarrierRequest; |
| import org.projectfloodlight.openflow.protocol.OFDescStatsReply; |
| import org.projectfloodlight.openflow.protocol.OFDescStatsRequest; |
| import org.projectfloodlight.openflow.protocol.OFEchoReply; |
| import org.projectfloodlight.openflow.protocol.OFEchoRequest; |
| import org.projectfloodlight.openflow.protocol.OFErrorMsg; |
| import org.projectfloodlight.openflow.protocol.OFErrorType; |
| import org.projectfloodlight.openflow.protocol.OFExperimenter; |
| import org.projectfloodlight.openflow.protocol.OFFactories; |
| import org.projectfloodlight.openflow.protocol.OFFactory; |
| import org.projectfloodlight.openflow.protocol.OFFeaturesReply; |
| import org.projectfloodlight.openflow.protocol.OFFlowModFailedCode; |
| import org.projectfloodlight.openflow.protocol.OFFlowRemoved; |
| import org.projectfloodlight.openflow.protocol.OFGetConfigReply; |
| import org.projectfloodlight.openflow.protocol.OFGetConfigRequest; |
| import org.projectfloodlight.openflow.protocol.OFHello; |
| import org.projectfloodlight.openflow.protocol.OFHelloElem; |
| import org.projectfloodlight.openflow.protocol.OFMessage; |
| import org.projectfloodlight.openflow.protocol.OFMeterFeaturesStatsReply; |
| import org.projectfloodlight.openflow.protocol.OFMeterFeaturesStatsRequest; |
| import org.projectfloodlight.openflow.protocol.OFPacketIn; |
| import org.projectfloodlight.openflow.protocol.OFPortDescStatsReply; |
| import org.projectfloodlight.openflow.protocol.OFPortDescStatsRequest; |
| import org.projectfloodlight.openflow.protocol.OFPortStatus; |
| import org.projectfloodlight.openflow.protocol.OFQueueGetConfigReply; |
| import org.projectfloodlight.openflow.protocol.OFRoleReply; |
| import org.projectfloodlight.openflow.protocol.OFSetConfig; |
| import org.projectfloodlight.openflow.protocol.OFStatsReply; |
| import org.projectfloodlight.openflow.protocol.OFStatsReplyFlags; |
| import org.projectfloodlight.openflow.protocol.OFStatsType; |
| import org.projectfloodlight.openflow.protocol.OFType; |
| import org.projectfloodlight.openflow.protocol.OFVersion; |
| import org.projectfloodlight.openflow.protocol.errormsg.OFBadRequestErrorMsg; |
| import org.projectfloodlight.openflow.protocol.errormsg.OFFlowModFailedErrorMsg; |
| import org.projectfloodlight.openflow.types.U32; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelInboundHandlerAdapter; |
| import io.netty.handler.ssl.SslHandler; |
| import io.netty.handler.timeout.IdleStateEvent; |
| import io.netty.handler.timeout.ReadTimeoutException; |
| import io.netty.util.ReferenceCountUtil; |
| |
| import javax.net.ssl.SSLPeerUnverifiedException; |
| |
| /** |
| * Channel handler deals with the switch connection and dispatches |
| * switch messages to the appropriate locations. |
| */ |
| class OFChannelHandler extends ChannelInboundHandlerAdapter |
| implements OpenFlowSession { |
| |
| private static final Logger log = LoggerFactory.getLogger(OFChannelHandler.class); |
| |
| private static final String RESET_BY_PEER = "Connection reset by peer"; |
| private static final String BROKEN_PIPE = "Broken pipe"; |
| static final int NUM_OF_QUEUES = 8; |
| |
| private final Controller controller; |
| private OpenFlowSwitchDriver sw; |
| private long thisdpid; // channelHandler cached value of connected switch id |
| private DeviceId deviceId; |
| private Channel channel; |
| private String channelId; |
| |
| |
| // State needs to be volatile because the HandshakeTimeoutHandler |
| // needs to check if the handshake is complete |
| private volatile ChannelState state; |
| |
| /** |
| * Timeout in ms to wait for meter feature reply. |
| */ |
| private static final long METER_TIMEOUT = 60_000; |
| |
| private volatile long lastStateChange = System.currentTimeMillis(); |
| |
| // When a switch with a duplicate dpid is found (i.e we already have a |
| // connected switch with the same dpid), the new switch is immediately |
| // disconnected. At that point netty callsback channelDisconnected() which |
| // proceeds to cleaup switch state - we need to ensure that it does not cleanup |
| // switch state for the older (still connected) switch |
| private volatile Boolean duplicateDpidFound; |
| |
| // Temporary storage for switch-features and port-description |
| private OFFeaturesReply featuresReply; |
| private List<OFPortDescStatsReply> portDescReplies; |
| private OFMeterFeaturesStatsReply meterFeaturesReply; |
| //private OFPortDescStatsReply portDescReply; |
| // a concurrent ArrayList to temporarily store port status messages |
| // before we are ready to deal with them |
| private final CopyOnWriteArrayList<OFPortStatus> pendingPortStatusMsg; |
| |
| //Indicates the openflow version used by this switch |
| protected OFVersion ofVersion; |
| protected OFFactory factory; |
| |
| /** transaction Ids to use during handshake. Since only one thread |
| * calls into an OFChannelHandler instance, we don't need atomic. |
| * We will count down |
| */ |
| private int handshakeTransactionIds = -1; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| private OpenFlowService openFlowManager; |
| |
| // Each IDLE_INTERVAL (see OFChannelInitializer) we will perform a sanity check |
| // Idle timeout actions will be performed each MAX_IDLE_RETRY * IDLE_INTERVAL |
| private static final int MAX_IDLE_RETRY = 4; |
| private int maxIdleRetry = MAX_IDLE_RETRY; |
| |
| // Dispatcher buffer/read size |
| private static final int BACKLOG_READ_BUFFER_DEFAULT = 1000; |
| |
| /** |
| * Map with all LinkedBlockingMessagesQueue queues which contains OFMessages. |
| */ |
| private Map<Integer, LinkedBlockingMessagesQueue<OFMessage>> dispatchQueuesMapProducer = new ConcurrentHashMap<>(); |
| |
| /** |
| * OFMessage classifiers map. |
| */ |
| private List<Set<OpenFlowClassifier>> messageClassifiersMapProducer = |
| new CopyOnWriteArrayList<Set<OpenFlowClassifier>>(); |
| |
| /** |
| * Lock held by take, poll, etc. |
| */ |
| private final ReentrantLock takeLock = new ReentrantLock(); |
| |
| /** |
| * Wait queue for waiting takes. |
| */ |
| private final Condition notEmpty = takeLock.newCondition(); |
| |
| /** |
| * Current number of elements in enabled sub-queues. |
| */ |
| private final AtomicInteger totalCount = new AtomicInteger(); |
| |
| /** |
| * Single thread executor for OFMessage dispatching. |
| * |
| * Gets initialized on channelActive, shutdown on channelInactive. |
| */ |
| private ExecutorService dispatcher; |
| |
| /** |
| * Handle for dispatcher thread. |
| * <p> |
| * Should only be touched from the Channel I/O thread |
| */ |
| private Future<?> dispatcherHandle = CompletableFuture.completedFuture(null); |
| |
| /** |
| * Dispatch backlog. |
| * <p> |
| * Should only be touched from the Channel I/O thread |
| */ |
| private final Deque<OFMessage> dispatchBacklog; |
| |
| /** |
| * Executor for runtime status events to offload from the main thread the |
| * processing of port status, mastership and connection OF messages. |
| * Executor is instantiated as a single thread executor guaranteeing processing |
| * of device status messages in order. |
| */ |
| protected ExecutorService runtimeStatusExecutor; |
| |
| /** |
| * Create a new unconnected OFChannelHandler. |
| * @param controller parent controller |
| */ |
| OFChannelHandler(Controller controller) { |
| |
| this.controller = controller; |
| this.state = ChannelState.INIT; |
| this.pendingPortStatusMsg = new CopyOnWriteArrayList<>(); |
| this.portDescReplies = new ArrayList<>(); |
| duplicateDpidFound = Boolean.FALSE; |
| String groupName = "onos/of-channel-handler"; |
| String pattern = "runtime-status-%d"; |
| ThreadFactory factory = new ThreadFactoryBuilder() |
| .setThreadFactory(groupedThreadFactory(groupName)) |
| .setNameFormat(groupName.replace(GroupedThreadFactory.DELIMITER, "-") + "-" + pattern) |
| .setUncaughtExceptionHandler((t, e) -> { |
| log.error("Exception on " + t.getName(), e); |
| throw new UncheckedIOException(new IOException(e)); |
| }).build(); |
| runtimeStatusExecutor = newSingleThreadExecutor( |
| factory); |
| //Initialize queues and classifiers |
| dispatchBacklog = new LinkedBlockingDeque<>(BACKLOG_READ_BUFFER_DEFAULT); |
| for (int i = 0; i < NUM_OF_QUEUES; i++) { |
| if (controller.getQueueSize(i) > 0) { |
| dispatchQueuesMapProducer.put(i, |
| new LinkedBlockingMessagesQueue<>(i, controller.getQueueSize(i), controller.getBulkSize(i))); |
| } |
| if (i != NUM_OF_QUEUES) { |
| messageClassifiersMapProducer.add(i, new CopyOnWriteArraySet<>()); |
| } |
| } |
| } |
| |
| // XXX S consider if necessary |
| public void disconnectSwitch() { |
| sw.disconnectSwitch(); |
| } |
| |
| //************************* |
| // Channel State Machine |
| //************************* |
| |
| /** |
| * The state machine for handling the switch/channel state. All state |
| * transitions should happen from within the state machine (and not from other |
| * parts of the code) |
| */ |
| enum ChannelState { |
| /** |
| * Initial state before channel is connected. |
| */ |
| INIT(false) { |
| @Override |
| void processOFMessage(OFChannelHandler h, OFMessage m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException { |
| // need to implement since its abstract but it will never |
| // be called |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| unhandledMessageReceived(h, m); |
| } |
| }, |
| |
| /** |
| * We send a OF 1.3 HELLO to the switch and wait for a Hello from the switch. |
| * Once we receive the reply, we decide on OF 1.3 or 1.0 switch - no other |
| * protocol version is accepted. |
| * We send an OFFeaturesRequest depending on the protocol version selected |
| * Next state is WAIT_FEATURES_REPLY |
| */ |
| WAIT_HELLO(false) { |
| @Override |
| void processOFHello(OFChannelHandler h, OFHello m) |
| throws IOException { |
| // TODO We could check for the optional bitmap, but for now |
| // we are just checking the version number. |
| if (m.getVersion().getWireVersion() >= OFVersion.OF_13.getWireVersion()) { |
| log.debug("Received {} Hello from {} - switching to OF " |
| + "version 1.3+", m.getVersion(), |
| h.channel.remoteAddress()); |
| h.ofVersion = m.getVersion(); |
| h.factory = OFFactories.getFactory(h.ofVersion); |
| h.sendHandshakeHelloMessage(); |
| } else if (m.getVersion().getWireVersion() >= OFVersion.OF_10.getWireVersion()) { |
| log.debug("Received {} Hello from {} - switching to OF " |
| + "version 1.0", m.getVersion(), |
| h.channel.remoteAddress()); |
| h.ofVersion = m.getVersion(); |
| h.factory = OFFactories.getFactory(h.ofVersion); |
| OFHello hi = |
| h.factory.buildHello() |
| .setXid(h.handshakeTransactionIds--) |
| .build(); |
| h.channel.writeAndFlush(Collections.singletonList(hi)); |
| } else { |
| log.error("Received Hello of version {} from switch at {}. " |
| + "This controller works with OF1.0 and OF1.3 " |
| + "switches. Disconnecting switch ...", |
| m.getVersion(), h.channel.remoteAddress()); |
| h.channel.disconnect(); |
| return; |
| } |
| h.sendHandshakeFeaturesRequestMessage(); |
| h.setState(WAIT_FEATURES_REPLY); |
| } |
| |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, |
| OFStatsReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) { |
| logErrorDisconnect(h, m); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| unhandledMessageReceived(h, m); |
| } |
| }, |
| |
| /** |
| * We are waiting for a features reply message. Once we receive it, the |
| * behavior depends on whether this is a 1.0 or 1.3 switch. For 1.0, |
| * we send a SetConfig request, barrier, and GetConfig request and the |
| * next state is WAIT_CONFIG_REPLY. For 1.3, we send a Port description |
| * request and the next state is WAIT_PORT_DESC_REPLY. |
| */ |
| WAIT_FEATURES_REPLY(false) { |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException { |
| Long dpid = m.getDatapathId().getLong(); |
| if (!h.setDpid(dpid, h.channel)) { |
| log.error("Switch presented invalid certificate for dpid {}. Disconnecting", |
| dpid); |
| h.channel.disconnect(); |
| return; |
| } |
| h.deviceId = DeviceId.deviceId(uri(h.thisdpid)); |
| log.debug("Received features reply for switch at {} with dpid {}", |
| h.getSwitchInfoString(), h.thisdpid); |
| |
| h.featuresReply = m; //temp store |
| if (h.ofVersion == OFVersion.OF_10) { |
| h.sendHandshakeSetConfig(); |
| h.setState(WAIT_CONFIG_REPLY); |
| } else { |
| //version is 1.3, must get switchport information |
| h.sendHandshakeOFPortDescRequest(); |
| h.setState(WAIT_PORT_DESC_REPLY); |
| } |
| } |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, |
| OFStatsReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) { |
| logErrorDisconnect(h, m); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| h.pendingPortStatusMsg.add(m); |
| } |
| }, |
| |
| /** |
| * We are waiting for a description of the 1.3 switch ports. |
| * Once received, we send a SetConfig request |
| * Next State is WAIT_CONFIG_REPLY |
| */ |
| WAIT_PORT_DESC_REPLY(false) { |
| |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, OFStatsReply m) |
| throws SwitchStateException { |
| // Read port description |
| if (m.getStatsType() != OFStatsType.PORT_DESC) { |
| log.warn("Expecting port description stats but received stats " |
| + "type {} from {}. Ignoring ...", m.getStatsType(), |
| h.channel.remoteAddress()); |
| return; |
| } |
| if (m.getFlags().contains(OFStatsReplyFlags.REPLY_MORE)) { |
| log.debug("Stats reply indicates more stats from sw {} for " |
| + "port description", |
| h.getSwitchInfoString()); |
| h.portDescReplies.add((OFPortDescStatsReply) m); |
| return; |
| } else { |
| h.portDescReplies.add((OFPortDescStatsReply) m); |
| } |
| //h.portDescReply = (OFPortDescStatsReply) m; // temp store |
| if (log.isDebugEnabled()) { |
| log.debug("Received port desc reply for switch at {}: {}", |
| h.getSwitchInfoString(), |
| ((OFPortDescStatsReply) m).getEntries()); |
| } |
| try { |
| h.sendHandshakeSetConfig(); |
| } catch (IOException e) { |
| log.error("Unable to send setConfig after PortDescReply. " |
| + "Error: {}", e.getMessage()); |
| } |
| h.setState(WAIT_CONFIG_REPLY); |
| } |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException, SwitchStateException { |
| logErrorDisconnect(h, m); |
| |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException, SwitchStateException { |
| h.pendingPortStatusMsg.add(m); |
| |
| } |
| }, |
| |
| /** |
| * We are waiting for a config reply message. Once we receive it |
| * we send a DescriptionStatsRequest to the switch. |
| * Next state: WAIT_DESCRIPTION_STAT_REPLY |
| */ |
| WAIT_CONFIG_REPLY(false) { |
| @Override |
| void processOFGetConfigReply(OFChannelHandler h, OFGetConfigReply m) |
| throws IOException { |
| if (m.getMissSendLen() == 0xffff) { |
| log.trace("Config Reply from switch {} confirms " |
| + "miss length set to 0xffff", |
| h.getSwitchInfoString()); |
| } else { |
| // FIXME: we can't really deal with switches that don't send |
| // full packets. Shouldn't we drop the connection here? |
| log.warn("Config Reply from switch {} has " |
| + "miss length set to {}", |
| h.getSwitchInfoString(), |
| m.getMissSendLen()); |
| } |
| |
| nextState(h); |
| } |
| |
| /** |
| * Transition to next state based on OF version. |
| * |
| * @param h current channel handler |
| * @throws IOException |
| */ |
| private void nextState(OFChannelHandler h) throws IOException { |
| if (h.ofVersion.getWireVersion() >= OFVersion.OF_13.getWireVersion()) { |
| // Meters were introduced in OpenFlow 1.3 |
| h.sendMeterFeaturesRequest(); |
| h.setState(WAIT_METER_FEATURES_REPLY); |
| } else { |
| h.sendHandshakeDescriptionStatsRequest(); |
| h.setState(WAIT_DESCRIPTION_STAT_REPLY); |
| } |
| } |
| |
| @Override |
| void processOFBarrierReply(OFChannelHandler h, OFBarrierReply m) { |
| // do nothing; |
| } |
| |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, |
| OFStatsReply m) |
| throws IOException, SwitchStateException { |
| log.error("Received multipart(stats) message sub-type {}", |
| m.getStatsType()); |
| illegalMessageReceived(h, m); |
| } |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) { |
| if (m.getErrType() == OFErrorType.BAD_REQUEST) { |
| OFBadRequestErrorMsg badRequest = (OFBadRequestErrorMsg) m; |
| if (badRequest.getCode() == OFBadRequestCode.BAD_TYPE) { |
| log.debug("{} does not support GetConfig, moving on", h.getSwitchInfoString()); |
| try { |
| nextState(h); |
| return; |
| } catch (IOException e) { |
| log.error("Exception thrown transitioning to next", e); |
| logErrorDisconnect(h, m); |
| } |
| } |
| } |
| logErrorDisconnect(h, m); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| h.pendingPortStatusMsg.add(m); |
| } |
| }, |
| |
| /** |
| * We are waiting for a OFDescriptionStat message from the switch. |
| * Once we receive any stat message we try to parse it. If it's not |
| * a description stats message we disconnect. If its the expected |
| * description stats message, we: |
| * - use the switch driver to bind the switch and get an IOFSwitch instance |
| * - setup the IOFSwitch instance |
| * - add switch controller and send the initial role |
| * request to the switch. |
| * Next state: WAIT_INITIAL_ROLE |
| * In the typical case, where switches support role request messages |
| * the next state is where we expect the role reply message. |
| * In the special case that where the switch does not support any kind |
| * of role request messages, we don't send a role message, but we do |
| * request mastership from the registry service. This controller |
| * should become master once we hear back from the registry service. |
| * All following states will have a h.sw instance! |
| */ |
| WAIT_DESCRIPTION_STAT_REPLY(false) { |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, OFStatsReply m) |
| throws SwitchStateException { |
| // Read description, if it has been updated |
| if (m.getStatsType() != OFStatsType.DESC) { |
| log.warn("Expecting Description stats but received stats " |
| + "type {} from {}. Ignoring ...", m.getStatsType(), |
| h.channel.remoteAddress()); |
| return; |
| } |
| OFDescStatsReply drep = (OFDescStatsReply) m; |
| log.info("Received switch description reply {} from switch at {}", |
| drep, h.channel.remoteAddress()); |
| // Here is where we differentiate between different kinds of switches |
| h.sw = h.controller.getOFSwitchInstance(h.thisdpid, drep, h.ofVersion); |
| |
| if (h.sw == null) { |
| log.info("Switch not found for {}", h.thisdpid); |
| return; |
| } |
| |
| // set switch information |
| h.sw.setOFVersion(h.ofVersion); |
| h.sw.setFeaturesReply(h.featuresReply); |
| h.sw.setPortDescReplies(h.portDescReplies); |
| h.sw.setMeterFeaturesReply(h.meterFeaturesReply); |
| h.sw.setConnected(true); |
| h.sw.setChannel(h); |
| |
| //Port Description List has served its purpose, clearing. |
| h.portDescReplies.clear(); |
| |
| // boolean success = h.sw.connectSwitch(); |
| // |
| // if (!success) { |
| // disconnectDuplicate(h); |
| // return; |
| // } |
| |
| log.debug("Switch {} bound to class {}, description {}", |
| h.sw, h.sw.getClass(), drep); |
| //Put switch in EQUAL mode until we hear back from the global registry |
| //log.debug("Setting new switch {} to EQUAL and sending Role request", |
| // h.sw.getStringId()); |
| //h.sw.activateEqualSwitch(); |
| //h.setSwitchRole(RoleState.EQUAL); |
| |
| h.sw.startDriverHandshake(); |
| if (h.sw.isDriverHandshakeComplete()) { |
| // We are not able to complete the connection for a dpid collision. |
| // Same device reconnecting or different device configured with |
| // the same dpid. |
| if (!h.sw.connectSwitch()) { |
| // Disconnect from the device and return |
| disconnectDuplicate(h); |
| return; |
| } else { |
| h.initClassifiers(); |
| } |
| handlePendingPortStatusMessages(h); |
| h.setState(ACTIVE); |
| } else { |
| h.setState(WAIT_SWITCH_DRIVER_SUB_HANDSHAKE); |
| } |
| |
| } |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) { |
| logErrorDisconnect(h, m); |
| } |
| |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| h.pendingPortStatusMsg.add(m); |
| } |
| }, |
| |
| /** |
| * We are waiting for the respective switch driver to complete its |
| * configuration. Notice that we do not consider this to be part of the main |
| * switch-controller handshake. But we do consider it as a step that comes |
| * before we declare the switch as available to the controller. |
| * Next State: depends on the role of this controller for this switch - either |
| * MASTER or EQUAL. |
| */ |
| WAIT_SWITCH_DRIVER_SUB_HANDSHAKE(true) { |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException { |
| // will never be called. We override processOFMessage |
| } |
| |
| @Override |
| void processOFMessage(OFChannelHandler h, OFMessage m) |
| throws IOException, SwitchStateException { |
| |
| if (h.sw.isDriverHandshakeComplete()) { |
| moveToActive(h); |
| h.state.processOFMessage(h, m); |
| return; |
| |
| } |
| |
| if (m.getType() == OFType.ECHO_REQUEST) { |
| processOFEchoRequest(h, (OFEchoRequest) m); |
| } else if (m.getType() == OFType.ECHO_REPLY) { |
| processOFEchoReply(h, (OFEchoReply) m); |
| } else if (m.getType() == OFType.ROLE_REPLY) { |
| h.sw.handleRole(m); |
| } else if (m.getType() == OFType.ERROR) { |
| if (!h.sw.handleRoleError((OFErrorMsg) m)) { |
| h.sw.processDriverHandshakeMessage(m); |
| if (h.sw.isDriverHandshakeComplete()) { |
| moveToActive(h); |
| } |
| } |
| } else { |
| if (m.getType() == OFType.EXPERIMENTER && |
| ((OFExperimenter) m).getExperimenter() == |
| RoleManager.NICIRA_EXPERIMENTER) { |
| h.sw.handleNiciraRole(m); |
| } else { |
| h.sw.processDriverHandshakeMessage(m); |
| if (h.sw.isDriverHandshakeComplete()) { |
| moveToActive(h); |
| } |
| } |
| } |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException, SwitchStateException { |
| h.pendingPortStatusMsg.add(m); |
| } |
| |
| private void moveToActive(OFChannelHandler h) { |
| boolean success = h.sw.connectSwitch(); |
| // Disconnect from the device and return |
| if (!success) { |
| disconnectDuplicate(h); |
| return; |
| } |
| handlePendingPortStatusMessages(h); |
| h.setState(ACTIVE); |
| } |
| |
| }, |
| |
| /** |
| * We are expecting a OF Multi Part Meter Features Stats Reply. |
| * Notice that this information is only available for switches running |
| * OpenFlow 1.3 |
| */ |
| WAIT_METER_FEATURES_REPLY(true) { |
| |
| @Override |
| void processOFEchoRequest(OFChannelHandler h, OFEchoRequest m) |
| throws IOException { |
| super.processOFEchoRequest(h, m); |
| if (System.currentTimeMillis() - h.lastStateChange > METER_TIMEOUT) { |
| log.info("{} did not respond to MeterFeaturesRequest on time, " + |
| "moving on without it.", |
| h.getSwitchInfoString()); |
| h.sendHandshakeDescriptionStatsRequest(); |
| h.setState(WAIT_DESCRIPTION_STAT_REPLY); |
| } |
| } |
| |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException { |
| // Hardware switches may reply OFErrorMsg if meter is not supported |
| log.warn("Received OFError {}. It seems {} does not support Meter.", |
| m.getErrType().name(), Dpid.uri(h.thisdpid)); |
| log.debug("{}", m); |
| h.sendHandshakeDescriptionStatsRequest(); |
| h.setState(WAIT_DESCRIPTION_STAT_REPLY); |
| } |
| |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, |
| OFStatsReply m) |
| throws IOException, SwitchStateException { |
| switch (m.getStatsType()) { |
| case METER_FEATURES: |
| |
| log.debug("Received Meter Features"); |
| OFMeterFeaturesStatsReply ofmfsr = (OFMeterFeaturesStatsReply) m; |
| log.info("Received meter features from {} with max meters: {}", |
| h.getSwitchInfoString(), |
| ofmfsr.getFeatures().getMaxMeter()); |
| h.meterFeaturesReply = ofmfsr; |
| h.sendHandshakeDescriptionStatsRequest(); |
| h.setState(WAIT_DESCRIPTION_STAT_REPLY); |
| break; |
| default: |
| log.error("Unexpected OF Multi Part stats reply"); |
| illegalMessageReceived(h, m); |
| break; |
| } |
| } |
| |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException, SwitchStateException { |
| illegalMessageReceived(h, m); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException { |
| h.pendingPortStatusMsg.add(m); |
| } |
| |
| @Override |
| void processIdle(OFChannelHandler h) throws IOException { |
| log.info("{} did not respond to MeterFeaturesRequest, " + |
| "moving on without it.", |
| h.getSwitchInfoString()); |
| h.sendHandshakeDescriptionStatsRequest(); |
| h.setState(WAIT_DESCRIPTION_STAT_REPLY); |
| } |
| }, |
| |
| /** |
| * This controller is in MASTER role for this switch. We enter this state |
| * after requesting and winning control from the global registry. |
| * The main handshake as well as the switch-driver sub-handshake |
| * is complete at this point. |
| * // XXX S reconsider below |
| * In the (near) future we may deterministically assign controllers to |
| * switches at startup. |
| * We only leave this state if the switch disconnects or |
| * if we send a role request for SLAVE /and/ receive the role reply for |
| * SLAVE. |
| */ |
| ACTIVE(true) { |
| @Override |
| void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException, SwitchStateException { |
| // if we get here, then the error message is for something else |
| if (m.getErrType() == OFErrorType.BAD_REQUEST && |
| (((OFBadRequestErrorMsg) m).getCode() == OFBadRequestCode.EPERM || |
| ((OFBadRequestErrorMsg) m).getCode() == OFBadRequestCode.IS_SLAVE)) { |
| // We are the master controller and the switch returned |
| // a permission error. This is a likely indicator that |
| // the switch thinks we are slave. Reassert our role |
| // FIXME: this could be really bad during role transitions |
| // if two controllers are master (even if its only for |
| // a brief period). We might need to see if these errors |
| // persist before we reassert |
| // Scheduling in the executor to keep in line with other status events. |
| h.runtimeStatusExecutor.submit(() -> { |
| h.sw.reassertRole(); |
| }); |
| } else if (m.getErrType() == OFErrorType.FLOW_MOD_FAILED && |
| ((OFFlowModFailedErrorMsg) m).getCode() == |
| OFFlowModFailedCode.ALL_TABLES_FULL) { |
| h.sw.setTableFull(true); |
| } else { |
| logError(h, m); |
| } |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFStatisticsReply(OFChannelHandler h, |
| OFStatsReply m) { |
| if (m.getStatsType().equals(OFStatsType.PORT_DESC)) { |
| if (log.isDebugEnabled()) { |
| log.debug("Received port desc message from {}: {}", |
| h.sw.getDpid(), |
| ((OFPortDescStatsReply) m).getEntries()); |
| } |
| if (m.getFlags().contains(OFStatsReplyFlags.REPLY_MORE)) { |
| log.debug("Active Stats reply indicates more stats from sw {} for " |
| + "port description", |
| h.getSwitchInfoString()); |
| h.portDescReplies.add((OFPortDescStatsReply) m); |
| h.dispatchMessage(m); |
| return; |
| } |
| |
| h.portDescReplies.add((OFPortDescStatsReply) m); |
| if (log.isDebugEnabled()) { |
| log.debug("Adding all Port Desc Active Replies to {}: {}", |
| h.sw.getDpid(), |
| h.portDescReplies); |
| } |
| h.sw.setPortDescReplies(h.portDescReplies); |
| //clearing to wait for next full response |
| h.portDescReplies.clear(); |
| } |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFExperimenter(OFChannelHandler h, OFExperimenter m) |
| throws SwitchStateException { |
| h.sw.handleNiciraRole(m); |
| } |
| |
| @Override |
| void processOFRoleReply(OFChannelHandler h, OFRoleReply m) |
| throws SwitchStateException { |
| h.runtimeStatusExecutor.execute(() -> { |
| try { |
| h.sw.handleRole(m); |
| } catch (SwitchStateException e) { |
| log.error("SwitchStateException while processing " + |
| "role reply message {}", m, e); |
| log.error("Disconnecting switch {} due to switch state error: {}", |
| h.getSwitchInfoString(), e.getMessage()); |
| h.channel.close(); |
| } |
| }); |
| } |
| |
| @Override |
| void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws SwitchStateException { |
| // Handing over processing of port status messages to a thread to avoid |
| // getting blocked on the main thread and resulting other OF message being delayed. |
| // Ordering of the status messages is guaranteed by runtimeStatsExecutor being a single |
| // threaded executor. This executor will execute concurrently to the netty thread; meaning |
| // that the order is no more guaranteed like it was in the past between different |
| // status handling messages and other messages: statistics (port, flows, meters, groups) |
| // barriers, idle, features, packet-ins handled inline to the netty thread. This executor |
| // will only apply to messages during the ACTIVE state of the connection. |
| h.runtimeStatusExecutor.execute(() -> { |
| try { |
| handlePortStatusMessage(h, m, true); |
| } catch (SwitchStateException e) { |
| log.error("SwitchStateException while processing " + |
| "port status message {}", m, e); |
| log.error("Disconnecting switch {} due to switch state error: {}", |
| h.getSwitchInfoString(), e.getMessage()); |
| h.channel.close(); |
| } |
| }); |
| //h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFPacketIn(OFChannelHandler h, OFPacketIn m) { |
| // OFPacketOut out = |
| // h.sw.factory().buildPacketOut() |
| // .setXid(m.getXid()) |
| // .setBufferId(m.getBufferId()).build(); |
| // h.sw.sendMsg(out); |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFFlowRemoved(OFChannelHandler h, |
| OFFlowRemoved m) { |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFBarrierReply(OFChannelHandler h, OFBarrierReply m) { |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) { |
| h.sw.setFeaturesReply(m); |
| h.dispatchMessage(m); |
| } |
| |
| @Override |
| void processIdle(OFChannelHandler h) throws IOException { |
| log.info("{} idle", h.getSwitchInfoString()); |
| } |
| |
| }; |
| |
| private final boolean handshakeComplete; |
| ChannelState(boolean handshakeComplete) { |
| this.handshakeComplete = handshakeComplete; |
| } |
| |
| /** |
| * Is this a state in which the handshake has completed? |
| * @return true if the handshake is complete |
| */ |
| public boolean isHandshakeComplete() { |
| return handshakeComplete; |
| } |
| |
| /** |
| * Get a string specifying the switch connection, state, and |
| * message received. To be used as message for SwitchStateException |
| * or log messages |
| * @param h The channel handler (to get switch information_ |
| * @param m The OFMessage that has just been received |
| * @param details A string giving more details about the exact nature |
| * of the problem. |
| * @return display string |
| */ |
| // needs to be protected because enum members are actually subclasses |
| protected String getSwitchStateMessage(OFChannelHandler h, |
| OFMessage m, |
| String details) { |
| return String.format("Switch: [%s], State: [%s], received: [%s]" |
| + ", details: %s", |
| h.getSwitchInfoString(), |
| this.toString(), |
| m.getType().toString(), |
| details); |
| } |
| |
| /** |
| * We have an OFMessage we didn't expect given the current state and |
| * we want to treat this as an error. |
| * We currently throw an exception that will terminate the connection |
| * However, we could be more forgiving |
| * @param h the channel handler that received the message |
| * @param m the message |
| * @throws SwitchStateException we always throw the exception |
| */ |
| // needs to be protected because enum members are actually subclasses |
| protected void illegalMessageReceived(OFChannelHandler h, OFMessage m) |
| throws SwitchStateException { |
| String msg = getSwitchStateMessage(h, m, |
| "Switch should never send this message in the current state"); |
| throw new SwitchStateException(msg); |
| |
| } |
| |
| /** |
| * We have an OFMessage we didn't expect given the current state and |
| * we want to ignore the message. |
| * @param h the channel handler the received the message |
| * @param m the message |
| */ |
| protected void unhandledMessageReceived(OFChannelHandler h, |
| OFMessage m) { |
| if (log.isDebugEnabled()) { |
| String msg = getSwitchStateMessage(h, m, |
| "Ignoring unexpected message"); |
| log.debug(msg); |
| } |
| } |
| |
| /** |
| * Log an OpenFlow error message from a switch. |
| * @param h The switch that sent the error |
| * @param error The error message |
| */ |
| protected void logError(OFChannelHandler h, OFErrorMsg error) { |
| log.error("{} from switch {} in state {}", |
| error, |
| h.getSwitchInfoString(), |
| this); |
| } |
| |
| /** |
| * Log an OpenFlow error message from a switch and disconnect the |
| * channel. |
| * |
| * @param h the IO channel for this switch. |
| * @param error The error message |
| */ |
| protected void logErrorDisconnect(OFChannelHandler h, OFErrorMsg error) { |
| logError(h, error); |
| log.error("Disconnecting switch {}", h.getSwitchInfoString()); |
| h.channel.disconnect(); |
| } |
| |
| /** |
| * log an error message for a duplicate dpid and disconnect this channel. |
| * @param h the IO channel for this switch. |
| */ |
| protected void disconnectDuplicate(OFChannelHandler h) { |
| log.error("Duplicated dpid or incompleted cleanup - " |
| + "disconnecting channel {}", h.getSwitchInfoString()); |
| h.duplicateDpidFound = Boolean.TRUE; |
| h.channel.disconnect(); |
| } |
| |
| /** |
| * Handles all pending port status messages before a switch is declared |
| * activated in MASTER or EQUAL role. Note that since this handling |
| * precedes the activation (and therefore notification to IOFSwitchListerners) |
| * the changes to ports will already be visible once the switch is |
| * activated. As a result, no notifications are sent out for these |
| * pending portStatus messages. |
| * |
| * @param h the channel handler that received the message |
| */ |
| protected void handlePendingPortStatusMessages(OFChannelHandler h) { |
| try { |
| handlePendingPortStatusMessages(h, 0); |
| } catch (SwitchStateException e) { |
| log.error(e.getMessage()); |
| } |
| } |
| |
| private void handlePendingPortStatusMessages(OFChannelHandler h, int index) |
| throws SwitchStateException { |
| if (h.sw == null) { |
| String msg = "State machine error: switch is null. Should never " + |
| "happen"; |
| throw new SwitchStateException(msg); |
| } |
| log.info("Processing {} pending port status messages for {}", |
| h.pendingPortStatusMsg.size(), h.sw.getStringId()); |
| |
| ArrayList<OFPortStatus> temp = new ArrayList<>(); |
| for (OFPortStatus ps: h.pendingPortStatusMsg) { |
| temp.add(ps); |
| handlePortStatusMessage(h, ps, false); |
| } |
| // expensive but ok - we don't expect too many port-status messages |
| // note that we cannot use clear(), because of the reasons below |
| h.pendingPortStatusMsg.removeAll(temp); |
| temp.clear(); |
| // the iterator above takes a snapshot of the list - so while we were |
| // dealing with the pending port-status messages, we could have received |
| // newer ones. Handle them recursively, but break the recursion after |
| // five steps to avoid an attack. |
| if (!h.pendingPortStatusMsg.isEmpty() && ++index < 5) { |
| handlePendingPortStatusMessages(h, index); |
| } |
| } |
| |
| /** |
| * Handle a port status message. |
| * |
| * Handle a port status message by updating the port maps in the |
| * IOFSwitch instance and notifying Controller about the change so |
| * it can dispatch a switch update. |
| * |
| * @param h The OFChannelHhandler that received the message |
| * @param m The PortStatus message we received |
| * @param doNotify if true switch port changed events will be |
| * dispatched |
| * @throws SwitchStateException if the switch is not bound to the channel |
| * |
| */ |
| protected void handlePortStatusMessage(OFChannelHandler h, OFPortStatus m, |
| boolean doNotify) throws SwitchStateException { |
| if (h.sw == null) { |
| String msg = getSwitchStateMessage(h, m, |
| "State machine error: switch is null. Should never " + |
| "happen"); |
| throw new SwitchStateException(msg); |
| } |
| log.info("Received port status message from {}/{}: {}", |
| h.sw.getDpid(), m.getDesc().getPortNo(), m); |
| |
| h.sw.handleMessage(m); |
| } |
| |
| /** |
| * Process an OF message received on the channel and |
| * update state accordingly. |
| * |
| * The main "event" of the state machine. Process the received message, |
| * send follow up message if required and update state if required. |
| * |
| * Switches on the message type and calls more specific event handlers |
| * for each individual OF message type. If we receive a message that |
| * is supposed to be sent from a controller to a switch we throw |
| * a SwitchStateExeption. |
| * |
| * The more specific handlers can also throw SwitchStateExceptions |
| * |
| * @param h The OFChannelHandler that received the message |
| * @param m The message we received. |
| * @throws SwitchStateException if the switch is not bound to the channel |
| * @throws IOException if unable to send message back to the switch |
| */ |
| void processOFMessage(OFChannelHandler h, OFMessage m) |
| throws IOException, SwitchStateException { |
| switch (m.getType()) { |
| case HELLO: |
| processOFHello(h, (OFHello) m); |
| break; |
| case BARRIER_REPLY: |
| processOFBarrierReply(h, (OFBarrierReply) m); |
| break; |
| case ECHO_REPLY: |
| processOFEchoReply(h, (OFEchoReply) m); |
| break; |
| case ECHO_REQUEST: |
| processOFEchoRequest(h, (OFEchoRequest) m); |
| break; |
| case ERROR: |
| processOFError(h, (OFErrorMsg) m); |
| break; |
| case FEATURES_REPLY: |
| processOFFeaturesReply(h, (OFFeaturesReply) m); |
| break; |
| case FLOW_REMOVED: |
| processOFFlowRemoved(h, (OFFlowRemoved) m); |
| break; |
| case GET_CONFIG_REPLY: |
| processOFGetConfigReply(h, (OFGetConfigReply) m); |
| break; |
| case PACKET_IN: |
| processOFPacketIn(h, (OFPacketIn) m); |
| break; |
| case PORT_STATUS: |
| processOFPortStatus(h, (OFPortStatus) m); |
| break; |
| case QUEUE_GET_CONFIG_REPLY: |
| processOFQueueGetConfigReply(h, (OFQueueGetConfigReply) m); |
| break; |
| case STATS_REPLY: // multipart_reply in 1.3 |
| processOFStatisticsReply(h, (OFStatsReply) m); |
| break; |
| case EXPERIMENTER: |
| processOFExperimenter(h, (OFExperimenter) m); |
| break; |
| case ROLE_REPLY: |
| processOFRoleReply(h, (OFRoleReply) m); |
| break; |
| case GET_ASYNC_REPLY: |
| processOFGetAsyncReply(h, (OFAsyncGetReply) m); |
| break; |
| |
| // The following messages are sent to switches. The controller |
| // should never receive them |
| case SET_CONFIG: |
| case GET_CONFIG_REQUEST: |
| case PACKET_OUT: |
| case PORT_MOD: |
| case QUEUE_GET_CONFIG_REQUEST: |
| case BARRIER_REQUEST: |
| case STATS_REQUEST: // multipart request in 1.3 |
| case FEATURES_REQUEST: |
| case FLOW_MOD: |
| case GROUP_MOD: |
| case TABLE_MOD: |
| case GET_ASYNC_REQUEST: |
| case SET_ASYNC: |
| case METER_MOD: |
| default: |
| illegalMessageReceived(h, m); |
| break; |
| } |
| } |
| |
| /*----------------------------------------------------------------- |
| * Default implementation for message handlers in any state. |
| * |
| * Individual states must override these if they want a behavior |
| * that differs from the default. |
| * |
| * In general, these handlers simply ignore the message and do |
| * nothing. |
| * |
| * There are some exceptions though, since some messages really |
| * are handled the same way in every state (e.g., ECHO_REQUST) or |
| * that are only valid in a single state (e.g., HELLO, GET_CONFIG_REPLY |
| -----------------------------------------------------------------*/ |
| |
| void processOFHello(OFChannelHandler h, OFHello m) |
| throws IOException, SwitchStateException { |
| // we only expect hello in the WAIT_HELLO state |
| log.warn("Received Hello outside WAIT_HELLO state; switch {} is not complaint.", |
| h.channel.remoteAddress()); |
| } |
| |
| void processOFBarrierReply(OFChannelHandler h, OFBarrierReply m) |
| throws IOException { |
| // Silently ignore. |
| } |
| |
| void processOFEchoRequest(OFChannelHandler h, OFEchoRequest m) |
| throws IOException { |
| if (h.ofVersion == null) { |
| log.error("No OF version set for {}. Not sending Echo REPLY", |
| h.channel.remoteAddress()); |
| return; |
| } |
| OFEchoReply reply = h.factory |
| .buildEchoReply() |
| .setXid(m.getXid()) |
| .setData(m.getData()) |
| .build(); |
| h.channel.writeAndFlush(Collections.singletonList(reply)); |
| } |
| |
| void processOFEchoReply(OFChannelHandler h, OFEchoReply m) |
| throws IOException { |
| // Do nothing with EchoReplies !! |
| } |
| |
| // no default implementation for OFError |
| // every state must override it |
| abstract void processOFError(OFChannelHandler h, OFErrorMsg m) |
| throws IOException, SwitchStateException; |
| |
| |
| void processOFFeaturesReply(OFChannelHandler h, OFFeaturesReply m) |
| throws IOException, SwitchStateException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFFlowRemoved(OFChannelHandler h, OFFlowRemoved m) |
| throws IOException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFGetConfigReply(OFChannelHandler h, OFGetConfigReply m) |
| throws IOException, SwitchStateException { |
| // we only expect config replies in the WAIT_CONFIG_REPLY state |
| illegalMessageReceived(h, m); |
| } |
| |
| void processOFPacketIn(OFChannelHandler h, OFPacketIn m) |
| throws IOException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| // no default implementation. Every state needs to handle it. |
| abstract void processOFPortStatus(OFChannelHandler h, OFPortStatus m) |
| throws IOException, SwitchStateException; |
| |
| void processOFQueueGetConfigReply(OFChannelHandler h, |
| OFQueueGetConfigReply m) |
| throws IOException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFStatisticsReply(OFChannelHandler h, OFStatsReply m) |
| throws IOException, SwitchStateException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFExperimenter(OFChannelHandler h, OFExperimenter m) |
| throws IOException, SwitchStateException { |
| // TODO: it might make sense to parse the vendor message here |
| // into the known vendor messages we support and then call more |
| // specific event handlers |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFRoleReply(OFChannelHandler h, OFRoleReply m) |
| throws SwitchStateException, IOException { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processOFGetAsyncReply(OFChannelHandler h, |
| OFAsyncGetReply m) { |
| unhandledMessageReceived(h, m); |
| } |
| |
| void processIdle(OFChannelHandler h) throws IOException { |
| // disconnect channel which did no complete handshake |
| log.error("{} idle in state {}, disconnecting", h.getSwitchInfoString(), this); |
| h.channel.disconnect(); |
| } |
| } |
| |
| //************************* |
| // Channel handler methods |
| //************************* |
| |
| @Override |
| public void channelActive(ChannelHandlerContext ctx) |
| throws Exception { |
| |
| channel = ctx.channel(); |
| log.info("New switch connection from {}", |
| channel.remoteAddress()); |
| |
| SocketAddress address = channel.remoteAddress(); |
| if (address instanceof InetSocketAddress) { |
| final InetSocketAddress inetAddress = (InetSocketAddress) address; |
| final IpAddress ipAddress = IpAddress.valueOf(inetAddress.getAddress()); |
| if (ipAddress.isIp4()) { |
| channelId = ipAddress.toString() + ':' + inetAddress.getPort(); |
| } else { |
| channelId = '[' + ipAddress.toString() + "]:" + inetAddress.getPort(); |
| } |
| } else { |
| channelId = channel.toString(); |
| } |
| |
| dispatcher = Executors.newSingleThreadExecutor(groupedThreads("onos/of/dispatcher", channelId, log)); |
| |
| /* |
| hack to wait for the switch to tell us what it's |
| max version is. This is not spec compliant and should |
| be removed as soon as switches behave better. |
| */ |
| //sendHandshakeHelloMessage(); |
| setState(ChannelState.WAIT_HELLO); |
| } |
| |
| @Override |
| public void channelInactive(ChannelHandlerContext ctx) |
| throws Exception { |
| log.info("Switch disconnected callback for sw:{}. Cleaning up ...", |
| getSwitchInfoString()); |
| |
| if (dispatcher != null) { |
| dispatcher.shutdownNow(); |
| dispatcher = null; |
| } |
| |
| if (thisdpid != 0) { |
| if (!duplicateDpidFound) { |
| // if the disconnected switch (on this ChannelHandler) |
| // was not one with a duplicate-dpid, it is safe to remove all |
| // state for it at the controller. Notice that if the disconnected |
| // switch was a duplicate-dpid, calling the method below would clear |
| // all state for the original switch (with the same dpid), |
| // which we obviously don't want. |
| runtimeStatusExecutor.submit(() -> { |
| log.info("{}:removal called", getSwitchInfoString()); |
| if (sw != null) { |
| sw.removeConnectedSwitch(); |
| } |
| }); |
| } else { |
| // A duplicate was disconnected on this ChannelHandler, |
| // this is the same switch reconnecting, but the original state was |
| // not cleaned up - XXX check liveness of original ChannelHandler |
| log.info("{}:duplicate found", getSwitchInfoString()); |
| duplicateDpidFound = Boolean.FALSE; |
| } |
| } else { |
| log.warn("no dpid in channelHandler registered for " |
| + "disconnected switch {}", getSwitchInfoString()); |
| } |
| } |
| |
| @Override |
| public void exceptionCaught(ChannelHandlerContext ctx, |
| Throwable cause) |
| throws Exception { |
| |
| if (cause instanceof ReadTimeoutException) { |
| // switch timeout |
| log.error("Disconnecting switch {} due to read timeout", |
| getSwitchInfoString()); |
| ctx.channel().close(); |
| } else if (cause instanceof HandshakeTimeoutException) { |
| log.error("Disconnecting switch {}: failed to complete handshake", |
| getSwitchInfoString()); |
| ctx.channel().close(); |
| } else if (cause instanceof ClosedChannelException) { |
| log.debug("Channel for sw {} already closed", getSwitchInfoString()); |
| } else if (cause instanceof IOException) { |
| if (!cause.getMessage().equals(RESET_BY_PEER) && |
| !cause.getMessage().equals(BROKEN_PIPE)) { |
| log.error("Disconnecting switch {} due to IO Error: {}", |
| getSwitchInfoString(), cause.getMessage()); |
| if (log.isDebugEnabled()) { |
| // still print stack trace if debug is enabled |
| log.debug("StackTrace for previous Exception: ", cause); |
| } |
| } |
| ctx.channel().close(); |
| } else if (cause instanceof SwitchStateException) { |
| log.error("Disconnecting switch {} due to switch state error: {}", |
| getSwitchInfoString(), cause.getMessage()); |
| if (log.isDebugEnabled()) { |
| // still print stack trace if debug is enabled |
| log.debug("StackTrace for previous Exception: ", cause); |
| } |
| ctx.channel().close(); |
| } else if (cause instanceof OFParseError) { |
| log.error("Disconnecting switch " |
| + getSwitchInfoString() + |
| " due to message parse failure", |
| cause); |
| ctx.channel().close(); |
| } else if (cause instanceof RejectedExecutionException) { |
| log.warn("Could not process message: queue full"); |
| } else { |
| log.error("Error while processing message from switch " |
| + getSwitchInfoString() |
| + "state " + this.state, cause); |
| ctx.channel().close(); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return getSwitchInfoString(); |
| } |
| |
| // We have reduced the idle period, the idea is to use |
| // the IdleHandler to perform also some sanity checks. |
| // Previous code is still executed with the same frequency |
| // which is IDLE_INTERVAL * MAX_IDLE_RETRY of inactivity |
| private void channelIdle(ChannelHandlerContext ctx, |
| IdleStateEvent e) |
| throws IOException { |
| // dispatcher terminated for some reason, restart |
| if (dispatcherHandle.isDone()) { |
| dispatcherHandle = dispatcher.submit(new Dispatcher()); |
| } |
| // drain the backlog |
| processDispatchBacklogQueue(); |
| // Original timeout reached |
| if (--maxIdleRetry == 0) { |
| maxIdleRetry = MAX_IDLE_RETRY; |
| // Factory can be null if the channel goes idle during initial handshake. Since the switch |
| // is not even initialized properly, we just skip this and disconnect the channel. |
| if (factory != null) { |
| // send an echo request each time idle_timeout * TICK |
| OFMessage m = factory.buildEchoRequest().build(); |
| log.info("Sending Echo Request on idle channel: {}", ctx.channel()); |
| // XXX S some problems here -- echo request has no transaction id, and |
| // echo reply is not correlated to the echo request. |
| ctx.writeAndFlush(Collections.singletonList(m), ctx.voidPromise()); |
| } |
| state.processIdle(this); |
| } |
| } |
| |
| @Override |
| public void userEventTriggered(ChannelHandlerContext ctx, |
| Object evt) |
| throws Exception { |
| // If the connection is READER/WRITER idle try to send an echo request |
| if (evt instanceof IdleStateEvent) { |
| log.debug("Channel {} is {}", ctx.channel(), ((IdleStateEvent) evt).state()); |
| channelIdle(ctx, (IdleStateEvent) evt); |
| } else { |
| super.userEventTriggered(ctx, evt); |
| } |
| } |
| |
| // SimpleChannelInboundHandler without dependency to TypeParameterMatcher |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, |
| Object msg) throws Exception { |
| |
| boolean release = true; |
| maxIdleRetry = MAX_IDLE_RETRY; |
| try { |
| if (msg instanceof OFMessage) { |
| // channelRead0 inlined |
| state.processOFMessage(this, (OFMessage) msg); |
| } else { |
| release = false; |
| ctx.fireChannelRead(msg); |
| } |
| } finally { |
| if (release) { |
| ReferenceCountUtil.release(msg); |
| } |
| } |
| } |
| |
| |
| |
| |
| //************************* |
| // Channel utility methods |
| //************************* |
| |
| /** |
| * Is this a state in which the handshake has completed? |
| * |
| * @return true if the handshake is complete |
| */ |
| public boolean isHandshakeComplete() { |
| return this.state.isHandshakeComplete(); |
| } |
| |
| /** |
| * Increment totalCount variable and send signal to executor. |
| */ |
| private void incrementAndSignal() { |
| try { |
| totalCount.incrementAndGet(); |
| takeLock.lockInterruptibly(); |
| try { |
| notEmpty.signal(); |
| } finally { |
| takeLock.unlock(); |
| } |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** |
| * Try to push OpenFlow message to queue. |
| * |
| * @param message OpenFlow message |
| * @param idQueue id of Queue |
| * @return true if message was successful added to queue |
| */ |
| private boolean pushMessageToQueue(OFMessage message, int idQueue) { |
| if (!dispatchQueuesMapProducer.get(idQueue).offer(message)) { |
| return false; |
| } else { |
| incrementAndSignal(); |
| return true; |
| } |
| } |
| |
| /** |
| * Process backlog - move messages from backlog to default queue. |
| * |
| * @return true if whole backlog was processed, otherwise false |
| */ |
| private boolean processDispatchBacklogQueue() { |
| while (!dispatchBacklog.isEmpty()) { |
| OFMessage msgFromBacklog = dispatchBacklog.removeFirst(); |
| if (!pushMessageToQueue(msgFromBacklog, NUM_OF_QUEUES - 1)) { |
| dispatchBacklog.addFirst(msgFromBacklog); |
| return false; |
| } |
| } |
| return true; |
| |
| } |
| |
| /** |
| * Parse OpenFlow message context for get Ethernet packet. |
| * |
| * @param message OpenFlow message |
| * @return parsed Ethernet packet |
| */ |
| private Ethernet parsePacketInMessage(OFMessage message) { |
| OpenFlowPacketContext pktCtx = DefaultOpenFlowPacketContext |
| .packetContextFromPacketIn(sw, (OFPacketIn) message); |
| DeviceId id = DeviceId.deviceId(Dpid.uri(pktCtx.dpid().value())); |
| DefaultInboundPacket inPkt = new DefaultInboundPacket( |
| new ConnectPoint(id, PortNumber.portNumber(pktCtx.inPort())), |
| pktCtx.parsed(), ByteBuffer.wrap(pktCtx.unparsed()), |
| pktCtx.cookie()); |
| return inPkt.parsed(); |
| } |
| |
| /** |
| * Classify the Ethernet packet for membership on one of the queues. |
| * |
| * @param packet ethernet packet |
| * @return Id of destination Queue |
| */ |
| private int classifyEthernetPacket(Ethernet packet) { |
| for (Set<OpenFlowClassifier> classifiers : this.messageClassifiersMapProducer) { |
| for (OpenFlowClassifier classifier : classifiers) { |
| if (classifier.ethernetType() == packet.getEtherType()) { |
| return classifier.idQueue(); |
| } |
| } |
| } |
| return NUM_OF_QUEUES - 1; |
| } |
| |
| /** |
| * Process messages from dispatch queues. |
| * |
| * @param queuesSize count of messages in all queues |
| */ |
| private void processMessages(int queuesSize) { |
| List<OFMessage> msgs = new ArrayList<>(); |
| int processed; |
| do { |
| processed = 0; |
| while (processed < queuesSize) { |
| for (LinkedBlockingMessagesQueue<OFMessage> queue : |
| dispatchQueuesMapProducer.values()) { |
| processed += queue.drainTo(msgs); |
| } |
| } |
| |
| msgs.forEach(sw::handleMessage); |
| msgs.clear(); |
| /* Decrement conditional variable */ |
| queuesSize = totalCount.addAndGet(-1 * processed); |
| } while (queuesSize > 0); |
| } |
| |
| private void dispatchMessage(OFMessage m) { |
| log.debug("Begin dispatch OpenFlow Message"); |
| boolean backlogEmpty = processDispatchBacklogQueue(); |
| if (m.getType() == OFType.PACKET_IN) { |
| Ethernet pkt = parsePacketInMessage(m); |
| pushMessageToQueue(m, classifyEthernetPacket(pkt)); |
| } else { |
| if (!backlogEmpty || !pushMessageToQueue(m, NUM_OF_QUEUES - 1)) { |
| dispatchBacklog.offer(m); |
| } |
| } |
| |
| if (dispatcherHandle.isDone()) { |
| // dispatcher terminated for some reason, restart |
| dispatcherHandle = dispatcher.submit(new Dispatcher()); |
| } |
| } |
| |
| private final class Dispatcher implements Runnable { |
| // dispatch loop |
| @Override |
| public void run() { |
| try { |
| for (;;) { |
| int tc = 0; |
| takeLock.lockInterruptibly(); |
| try { |
| while ((tc = totalCount.get()) == 0) { |
| notEmpty.await(); |
| } |
| } finally { |
| takeLock.unlock(); |
| } |
| |
| processMessages(tc); |
| } |
| } catch (InterruptedException e) { |
| log.warn("Dispatcher interrupted"); |
| Thread.currentThread().interrupt(); |
| // interrupted. gracefully shutting down |
| return; |
| } |
| } |
| } |
| |
| /** |
| * Return a string describing this switch based on the already available |
| * information (DPID and/or remote socket). |
| * @return display string |
| */ |
| private String getSwitchInfoString() { |
| if (sw != null) { |
| return sw.toString(); |
| } |
| String channelString; |
| if (channel == null || channel.remoteAddress() == null) { |
| channelString = "?"; |
| } else { |
| channelString = channel.remoteAddress().toString(); |
| } |
| String dpidString; |
| if (featuresReply == null) { |
| dpidString = "?"; |
| } else { |
| dpidString = featuresReply.getDatapathId().toString(); |
| } |
| return String.format("[%s DPID[%s]]", channelString, dpidString); |
| } |
| |
| /** |
| * Update the channels state. Only called from the state machine. |
| * TODO: enforce restricted state transitions |
| * @param state new state |
| */ |
| void setState(ChannelState state) { |
| this.state = state; |
| this.lastStateChange = System.currentTimeMillis(); |
| } |
| |
| private boolean setDpid(Long dpid, Channel channel) { |
| ChannelHandlerContext sslContext = channel.pipeline().context(SslHandler.class); |
| if (sslContext != null) { |
| try { |
| SslHandler sslHandler = (SslHandler) sslContext.handler(); |
| Certificate[] certs = sslHandler.engine().getSession().getPeerCertificates(); |
| Certificate cert = certs.length > 0 ? certs[0] : null; |
| if (!controller.isValidCertificate(dpid, cert)) { |
| return false; |
| } |
| } catch (SSLPeerUnverifiedException e) { |
| log.info("Switch with dpid {} is an unverified SSL peer.", dpid, e); |
| return false; |
| } |
| } |
| this.thisdpid = dpid; |
| return true; |
| } |
| |
| /** |
| * Send hello message to the switch using the handshake transactions ids. |
| * @throws IOException |
| */ |
| private void sendHandshakeHelloMessage() throws IOException { |
| // The OF protocol requires us to start things off by sending the highest |
| // version of the protocol supported. |
| |
| // bitmap represents OF1.0, OF1.3, OF1.4, and OF1.5 |
| // see Sec. 7.5.1 of the OF1.3.4 spec |
| U32 bitmap = U32.ofRaw((0b1 << OFVersion.OF_10.getWireVersion()) | |
| (0b1 << OFVersion.OF_13.getWireVersion()) | |
| (0b1 << OFVersion.OF_14.getWireVersion()) | |
| (0b1 << OFVersion.OF_15.getWireVersion())); |
| OFVersion version = Optional.ofNullable(ofVersion).orElse(OFVersion.OF_13); |
| OFHelloElem hem = OFFactories.getFactory(version) |
| .buildHelloElemVersionbitmap() |
| .setBitmaps(Collections.singletonList(bitmap)) |
| .build(); |
| OFMessage.Builder mb = OFFactories.getFactory(version) |
| .buildHello() |
| .setXid(this.handshakeTransactionIds--) |
| .setElements(Collections.singletonList(hem)); |
| log.info("Sending {} Hello to {}", version, channel.remoteAddress()); |
| channel.writeAndFlush(Collections.singletonList(mb.build())); |
| } |
| |
| /** |
| * Send featuresRequest msg to the switch using the handshake transactions ids. |
| * @throws IOException |
| */ |
| private void sendHandshakeFeaturesRequestMessage() throws IOException { |
| log.debug("Sending FEATURES_REQUEST to {}", channel.remoteAddress()); |
| OFMessage m = factory.buildFeaturesRequest() |
| .setXid(this.handshakeTransactionIds--) |
| .build(); |
| channel.writeAndFlush(Collections.singletonList(m)); |
| } |
| |
| /** |
| * Send the configuration requests to tell the switch we want full |
| * packets. |
| * @throws IOException |
| */ |
| private void sendHandshakeSetConfig() throws IOException { |
| log.debug("Sending CONFIG_REQUEST to {}", channel.remoteAddress()); |
| List<OFMessage> msglist = new ArrayList<>(3); |
| |
| // Ensure we receive the full packet via PacketIn |
| // FIXME: We don't set the reassembly flags. |
| // Only send config to switches to send full packets, if they have a buffer. |
| // Saves a packet & OFSetConfig can't be handled by certain switches. |
| if (this.featuresReply.getNBuffers() > 0) { |
| OFSetConfig sc = factory |
| .buildSetConfig() |
| .setMissSendLen((short) 0xffff) |
| .setXid(this.handshakeTransactionIds--) |
| .build(); |
| msglist.add(sc); |
| } |
| |
| // Barrier |
| OFBarrierRequest br = factory |
| .buildBarrierRequest() |
| .setXid(this.handshakeTransactionIds--) |
| .build(); |
| msglist.add(br); |
| |
| // Verify (need barrier?) |
| OFGetConfigRequest gcr = factory |
| .buildGetConfigRequest() |
| .setXid(this.handshakeTransactionIds--) |
| .build(); |
| msglist.add(gcr); |
| channel.writeAndFlush(msglist); |
| } |
| |
| /** |
| * send a description state request. |
| * @throws IOException |
| */ |
| private void sendHandshakeDescriptionStatsRequest() throws IOException { |
| // Get Description to set switch-specific flags |
| log.debug("Sending DESC_STATS_REQUEST to {}", channel.remoteAddress()); |
| OFDescStatsRequest dreq = factory |
| .buildDescStatsRequest() |
| .setXid(handshakeTransactionIds--) |
| .build(); |
| channel.writeAndFlush(Collections.singletonList(dreq)); |
| } |
| |
| /** |
| * send a meter features request. |
| * |
| * @throws IOException |
| */ |
| private void sendMeterFeaturesRequest() throws IOException { |
| // Get meter features including the MaxMeters value available for the device |
| OFFactory factory = OFFactories.getFactory(ofVersion); |
| log.debug("Sending METER_FEATURES_REQUEST to {}", channel.remoteAddress()); |
| OFMeterFeaturesStatsRequest mfreq = factory |
| .buildMeterFeaturesStatsRequest() |
| .setXid(handshakeTransactionIds--) |
| .build(); |
| channel.writeAndFlush(Collections.singletonList(mfreq)); |
| } |
| |
| private void sendHandshakeOFPortDescRequest() throws IOException { |
| log.debug("Sending OF_PORT_DESC_REQUEST to {}", channel.remoteAddress()); |
| // Get port description for 1.3+ switch |
| OFPortDescStatsRequest preq = factory |
| .buildPortDescStatsRequest() |
| .setXid(handshakeTransactionIds--) |
| .build(); |
| channel.writeAndFlush(Collections.singletonList(preq)); |
| } |
| |
| ChannelState getStateForTesting() { |
| return state; |
| } |
| |
| |
| @Override |
| public boolean isActive() { |
| if (channel != null) { |
| return channel.isActive(); |
| } |
| return false; |
| } |
| |
| @Override |
| public void closeSession() { |
| if (channel != null) { |
| channel.close(); |
| } |
| } |
| |
| @Override |
| public boolean sendMsg(Iterable<OFMessage> msgs) { |
| if (channel.isActive()) { |
| if (log.isTraceEnabled()) { |
| log.trace("Sending messages for switch {} via openflow channel: {}", getSwitchInfoString(), msgs); |
| } |
| channel.writeAndFlush(msgs, channel.voidPromise()); |
| return true; |
| } else { |
| log.warn("Dropping messages for switch {} because channel is not connected: {}", |
| getSwitchInfoString(), msgs); |
| return false; |
| } |
| } |
| |
| @Override |
| public CharSequence sessionInfo() { |
| return channelId; |
| } |
| |
| @Override |
| public void addClassifier(OpenFlowClassifier classifier) { |
| if (this.deviceId.equals(classifier.deviceId())) { |
| log.debug("Add OpenFlow Classifier for switch {} to queue {} with type {}", |
| classifier.deviceId().toString(), classifier.idQueue(), classifier.ethernetType()); |
| this.messageClassifiersMapProducer.get(classifier.idQueue()).add(classifier); |
| } |
| } |
| |
| @Override |
| public void removeClassifier(OpenFlowClassifier classifier) { |
| if (this.deviceId.equals(classifier.deviceId())) { |
| log.debug("Remove OpenFlow Classifier for switch {} from queue {} with type {}", |
| classifier.deviceId().toString(), classifier.idQueue(), classifier.ethernetType()); |
| this.messageClassifiersMapProducer.get(classifier.idQueue()).remove(classifier); |
| } |
| } |
| |
| /** |
| * Init classifier configuration for the switch. Use stored configuration if exist. |
| * Otherwise add LLDP and BDDP classifiers for Queue N0. |
| */ |
| private void initClassifiers() { |
| try { |
| openFlowManager = DefaultServiceDirectory.getService(OpenFlowService.class); |
| DeviceId did = DeviceId.deviceId(uri(thisdpid)); |
| Set<OpenFlowClassifier> classifiers = openFlowManager.getClassifiersByDeviceId(did); |
| if (classifiers == null) { |
| OpenFlowClassifier classifier = |
| new OpenFlowClassifier.Builder(did, 0).ethernetType(TYPE_LLDP).build(); |
| openFlowManager.add(classifier); |
| classifier = new OpenFlowClassifier.Builder(did, 0).ethernetType(TYPE_BSN).build(); |
| openFlowManager.add(classifier); |
| } else { |
| this.messageClassifiersMapProducer.forEach((v) -> { |
| v.clear(); |
| }); |
| classifiers.forEach((c) -> { |
| messageClassifiersMapProducer.get(c.idQueue()).add(c); |
| }); |
| } |
| } catch (Exception e) { |
| log.error("Initialize default classifier failed: {}", e.toString()); |
| e.printStackTrace(); |
| } |
| } |
| } |