| package net.onrc.onos.apps.forwarding; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import net.floodlightcontroller.core.FloodlightContext; |
| import net.floodlightcontroller.core.IFloodlightProviderService; |
| import net.floodlightcontroller.core.IOFMessageListener; |
| import net.floodlightcontroller.core.IOFSwitch; |
| import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| import net.floodlightcontroller.core.module.IFloodlightModule; |
| import net.floodlightcontroller.core.module.IFloodlightService; |
| import net.floodlightcontroller.util.MACAddress; |
| import net.onrc.onos.apps.proxyarp.BroadcastPacketOutNotification; |
| import net.onrc.onos.apps.proxyarp.IProxyArpService; |
| import net.onrc.onos.core.datagrid.IDatagridService; |
| import net.onrc.onos.core.datagrid.IEventChannel; |
| import net.onrc.onos.core.datagrid.IEventChannelListener; |
| import net.onrc.onos.core.devicemanager.IOnosDeviceService; |
| import net.onrc.onos.core.flowprogrammer.IFlowPusherService; |
| import net.onrc.onos.core.intent.Intent; |
| import net.onrc.onos.core.intent.Intent.IntentState; |
| import net.onrc.onos.core.intent.IntentMap; |
| import net.onrc.onos.core.intent.IntentOperation; |
| import net.onrc.onos.core.intent.IntentOperationList; |
| import net.onrc.onos.core.intent.PathIntent; |
| import net.onrc.onos.core.intent.ShortestPathIntent; |
| import net.onrc.onos.core.intent.runtime.IPathCalcRuntimeService; |
| import net.onrc.onos.core.intent.runtime.IntentStateList; |
| import net.onrc.onos.core.packet.Ethernet; |
| import net.onrc.onos.core.registry.IControllerRegistryService; |
| import net.onrc.onos.core.topology.Device; |
| import net.onrc.onos.core.topology.INetworkGraphService; |
| import net.onrc.onos.core.topology.LinkEvent; |
| import net.onrc.onos.core.topology.NetworkGraph; |
| import net.onrc.onos.core.topology.Switch; |
| import net.onrc.onos.core.util.Dpid; |
| import net.onrc.onos.core.util.FlowPath; |
| import net.onrc.onos.core.util.Port; |
| import net.onrc.onos.core.util.SwitchPort; |
| |
| import org.openflow.protocol.OFMessage; |
| import org.openflow.protocol.OFPacketIn; |
| import org.openflow.protocol.OFPacketOut; |
| import org.openflow.protocol.OFPort; |
| import org.openflow.protocol.OFType; |
| import org.openflow.protocol.action.OFAction; |
| import org.openflow.protocol.action.OFActionOutput; |
| import org.openflow.util.HexString; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.LinkedListMultimap; |
| import com.google.common.collect.ListMultimap; |
| |
| public class Forwarding implements IOFMessageListener, IFloodlightModule, |
| IForwardingService, IEventChannelListener<Long, IntentStateList> { |
| private static final Logger log = LoggerFactory.getLogger(Forwarding.class); |
| |
| private static final int SLEEP_TIME_FOR_DB_DEVICE_INSTALLED = 100; // milliseconds |
| private static final int NUMBER_OF_THREAD_FOR_EXECUTOR = 1; |
| |
| private static final ScheduledExecutorService EXECUTOR_SERVICE = Executors.newScheduledThreadPool(NUMBER_OF_THREAD_FOR_EXECUTOR); |
| |
| private final String callerId = "Forwarding"; |
| |
| private IFloodlightProviderService floodlightProvider; |
| private IFlowPusherService flowPusher; |
| private IDatagridService datagrid; |
| |
| private IEventChannel<Long, BroadcastPacketOutNotification> eventChannel; |
| private static final String SINGLE_PACKET_OUT_CHANNEL_NAME = "onos.forwarding.packet_out"; |
| |
| private IControllerRegistryService controllerRegistryService; |
| |
| private INetworkGraphService networkGraphService; |
| private NetworkGraph networkGraph; |
| private IPathCalcRuntimeService pathRuntime; |
| private IntentMap intentMap; |
| |
| // TODO it seems there is a Guava collection that will time out entries. |
| // We should see if this will work here. |
| private Map<Path, PushedFlow> pendingFlows; |
| private ListMultimap<String, PacketToPush> waitingPackets; |
| |
| private final Object lock = new Object(); |
| |
| private static class PacketToPush { |
| public final OFPacketOut packet; |
| public final long dpid; |
| |
| public PacketToPush(OFPacketOut packet, long dpid) { |
| this.packet = packet; |
| this.dpid = dpid; |
| } |
| } |
| |
| private static class PushedFlow { |
| public final String intentId; |
| public boolean installed = false; |
| public short firstOutPort; |
| |
| public PushedFlow(String flowId) { |
| this.intentId = flowId; |
| } |
| } |
| |
| private static final class Path { |
| public final MACAddress srcMac; |
| public final MACAddress dstMac; |
| |
| public Path(MACAddress srcMac, MACAddress dstMac) { |
| this.srcMac = srcMac; |
| this.dstMac = dstMac; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (!(other instanceof Path)) { |
| return false; |
| } |
| |
| Path otherPath = (Path) other; |
| return srcMac.equals(otherPath.srcMac) && |
| dstMac.equals(otherPath.dstMac); |
| } |
| |
| @Override |
| public int hashCode() { |
| int hash = 17; |
| hash = 31 * hash + srcMac.hashCode(); |
| hash = 31 * hash + dstMac.hashCode(); |
| return hash; |
| } |
| |
| @Override |
| public String toString() { |
| return "(" + srcMac + ") => (" + dstMac + ")"; |
| } |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
| List<Class<? extends IFloodlightService>> services = |
| new ArrayList<Class<? extends IFloodlightService>>(1); |
| services.add(IForwardingService.class); |
| return services; |
| } |
| |
| @Override |
| public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() { |
| Map<Class<? extends IFloodlightService>, IFloodlightService> impls = |
| new HashMap<Class<? extends IFloodlightService>, IFloodlightService>(1); |
| impls.put(IForwardingService.class, this); |
| return impls; |
| } |
| |
| @Override |
| public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
| List<Class<? extends IFloodlightService>> dependencies = |
| new ArrayList<Class<? extends IFloodlightService>>(); |
| dependencies.add(IFloodlightProviderService.class); |
| dependencies.add(IFlowPusherService.class); |
| dependencies.add(IControllerRegistryService.class); |
| dependencies.add(IOnosDeviceService.class); |
| dependencies.add(IDatagridService.class); |
| dependencies.add(INetworkGraphService.class); |
| dependencies.add(IPathCalcRuntimeService.class); |
| // We don't use the IProxyArpService directly, but reactive forwarding |
| // requires it to be loaded and answering ARP requests |
| dependencies.add(IProxyArpService.class); |
| return dependencies; |
| } |
| |
| @Override |
| public void init(FloodlightModuleContext context) { |
| floodlightProvider = |
| context.getServiceImpl(IFloodlightProviderService.class); |
| flowPusher = context.getServiceImpl(IFlowPusherService.class); |
| datagrid = context.getServiceImpl(IDatagridService.class); |
| controllerRegistryService = context.getServiceImpl(IControllerRegistryService.class); |
| networkGraphService = context.getServiceImpl(INetworkGraphService.class); |
| pathRuntime = context.getServiceImpl(IPathCalcRuntimeService.class); |
| |
| floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this); |
| |
| pendingFlows = new HashMap<Path, PushedFlow>(); |
| waitingPackets = LinkedListMultimap.create(); |
| } |
| |
| @Override |
| public void startUp(FloodlightModuleContext context) { |
| |
| eventChannel = datagrid.createChannel(SINGLE_PACKET_OUT_CHANNEL_NAME, |
| Long.class, |
| BroadcastPacketOutNotification.class); |
| networkGraph = networkGraphService.getNetworkGraph(); |
| intentMap = pathRuntime.getPathIntents(); |
| datagrid.addListener("onos.pathintent_state", this, Long.class, IntentStateList.class); |
| } |
| |
| @Override |
| public String getName() { |
| return "onosforwarding"; |
| } |
| |
| @Override |
| public boolean isCallbackOrderingPrereq(OFType type, String name) { |
| return (type == OFType.PACKET_IN) && |
| (name.equals("devicemanager") || name.equals("proxyarpmanager") |
| || name.equals("onosdevicemanager")); |
| } |
| |
| @Override |
| public boolean isCallbackOrderingPostreq(OFType type, String name) { |
| return false; |
| } |
| |
| @Override |
| public Command receive( |
| IOFSwitch sw, OFMessage msg, FloodlightContext cntx) { |
| |
| if (msg.getType() != OFType.PACKET_IN || !(msg instanceof OFPacketIn)) { |
| return Command.CONTINUE; |
| } |
| |
| OFPacketIn pi = (OFPacketIn) msg; |
| |
| Ethernet eth = IFloodlightProviderService.bcStore. |
| get(cntx, IFloodlightProviderService.CONTEXT_PI_PAYLOAD); |
| |
| log.debug("Receive PACKET_IN swId {}, portId {}", sw.getId(), pi.getInPort()); |
| |
| if (eth.getEtherType() != Ethernet.TYPE_IPV4) { |
| return Command.CONTINUE; |
| } |
| |
| if (eth.isBroadcast() || eth.isMulticast()) { |
| handleBroadcast(sw, pi, eth); |
| } else { |
| // Unicast |
| handlePacketIn(sw, pi, eth); |
| } |
| |
| return Command.STOP; |
| } |
| |
| private void handleBroadcast(IOFSwitch sw, OFPacketIn pi, Ethernet eth) { |
| if (log.isTraceEnabled()) { |
| log.trace("Sending broadcast packet to other ONOS instances"); |
| } |
| |
| //We don't use address information, so 0 is put into the third argument. |
| BroadcastPacketOutNotification key = |
| new BroadcastPacketOutNotification( |
| eth.serialize(), |
| 0, sw.getId(), |
| pi.getInPort()); |
| eventChannel.addTransientEntry(eth.getDestinationMAC().toLong(), key); |
| } |
| |
| private void handlePacketIn(IOFSwitch sw, OFPacketIn pi, Ethernet eth) { |
| log.debug("Start handlePacketIn swId {}, portId {}", sw.getId(), pi.getInPort()); |
| |
| String destinationMac = |
| HexString.toHexString(eth.getDestinationMACAddress()); |
| |
| //FIXME getDeviceByMac() is a blocking call, so it may be better way to handle it to avoid the condition. |
| Device deviceObject = networkGraph.getDeviceByMac(MACAddress.valueOf(destinationMac)); |
| |
| if (deviceObject == null) { |
| log.debug("No device entry found for {}", |
| destinationMac); |
| |
| //Device is not in the DB, so wait it until the device is added. |
| EXECUTOR_SERVICE.schedule(new WaitDeviceArp(sw, pi, eth), SLEEP_TIME_FOR_DB_DEVICE_INSTALLED, TimeUnit.MILLISECONDS); |
| return; |
| } |
| |
| continueHandlePacketIn(sw, pi, eth, deviceObject); |
| } |
| |
| private class WaitDeviceArp implements Runnable { |
| IOFSwitch sw; |
| OFPacketIn pi; |
| Ethernet eth; |
| |
| public WaitDeviceArp(IOFSwitch sw, OFPacketIn pi, Ethernet eth) { |
| super(); |
| this.sw = sw; |
| this.pi = pi; |
| this.eth = eth; |
| } |
| |
| @Override |
| public void run() { |
| Device deviceObject = networkGraph.getDeviceByMac(MACAddress.valueOf(eth.getDestinationMACAddress())); |
| if (deviceObject == null) { |
| log.debug("wait {}ms and device was not found. Send broadcast packet and the thread finish.", SLEEP_TIME_FOR_DB_DEVICE_INSTALLED); |
| handleBroadcast(sw, pi, eth); |
| return; |
| } |
| log.debug("wait {}ms and device {} was found, continue", SLEEP_TIME_FOR_DB_DEVICE_INSTALLED, deviceObject.getMacAddress()); |
| continueHandlePacketIn(sw, pi, eth, deviceObject); |
| } |
| } |
| |
| private void continueHandlePacketIn(IOFSwitch sw, OFPacketIn pi, Ethernet eth, Device deviceObject) { |
| |
| log.debug("Start continuehandlePacketIn"); |
| |
| //Iterator<IPortObject> ports = deviceObject.getAttachedPorts().iterator(); |
| Iterator<net.onrc.onos.core.topology.Port> ports = deviceObject.getAttachmentPoints().iterator(); |
| if (!ports.hasNext()) { |
| log.debug("No attachment point found for device {} - broadcasting packet", |
| deviceObject.getMacAddress()); |
| handleBroadcast(sw, pi, eth); |
| return; |
| } |
| |
| //This code assumes the device has only one port. It should be problem. |
| net.onrc.onos.core.topology.Port portObject = ports.next(); |
| short destinationPort = portObject.getNumber().shortValue(); |
| Switch switchObject = portObject.getSwitch(); |
| long destinationDpid = switchObject.getDpid(); |
| |
| // TODO SwitchPort, Dpid and Port should probably be immutable |
| SwitchPort srcSwitchPort = new SwitchPort( |
| new Dpid(sw.getId()), new Port(pi.getInPort())); |
| SwitchPort dstSwitchPort = new SwitchPort( |
| new Dpid(destinationDpid), new Port(destinationPort)); |
| |
| MACAddress srcMacAddress = MACAddress.valueOf(eth.getSourceMACAddress()); |
| MACAddress dstMacAddress = MACAddress.valueOf(eth.getDestinationMACAddress()); |
| |
| synchronized (lock) { |
| //TODO check concurrency |
| Path pathspec = new Path(srcMacAddress, dstMacAddress); |
| PushedFlow existingFlow = pendingFlows.get(pathspec); |
| |
| //A path is installed side by side to reduce a path timeout and a wrong state. |
| if (existingFlow != null) { |
| // We've already start to install a flow for this pair of MAC addresses |
| if (log.isDebugEnabled()) { |
| log.debug("Found existing the same pathspec {}, intent ID is {}", |
| pathspec, |
| existingFlow.intentId); |
| } |
| |
| OFPacketOut po = constructPacketOut(pi, sw); |
| |
| // Find the correct port here. We just assume the PI is from |
| // the first hop switch, but this is definitely not always |
| // the case. We'll have to retrieve the flow from HZ every time |
| // because it could change (be rerouted) sometimes. |
| if (existingFlow.installed) { |
| // Flow has been sent to the switches so it is safe to |
| // send a packet out now |
| |
| Intent intent = intentMap.getIntent(existingFlow.intentId); |
| PathIntent pathIntent = null; |
| if (intent instanceof PathIntent) { |
| pathIntent = (PathIntent) intent; |
| } else { |
| log.debug("Intent {} is not PathIntent. Return.", intent.getId()); |
| return; |
| } |
| |
| Boolean isflowEntryForThisSwitch = false; |
| net.onrc.onos.core.topology.Path path = pathIntent.getPath(); |
| |
| for (Iterator<LinkEvent> i = path.iterator(); i.hasNext();) { |
| LinkEvent le = (LinkEvent) i.next(); |
| if (le.getSrc().dpid == sw.getId()) { |
| log.debug("src {} dst {}", le.getSrc(), le.getDst()); |
| isflowEntryForThisSwitch = true; |
| break; |
| } |
| } |
| |
| if (isflowEntryForThisSwitch == false) { |
| // If we don't find a flow entry for that switch, then we're |
| // in the middle of a rerouting (or something's gone wrong). |
| // This packet will be dropped as a victim of the rerouting. |
| log.debug("Dropping packet on flow {} between {}-{}", |
| existingFlow.intentId, |
| srcMacAddress, dstMacAddress); |
| } else { |
| log.debug("Sending packet out from sw {}, outport{}", sw, existingFlow.firstOutPort); |
| sendPacketOut(sw, po, existingFlow.firstOutPort); |
| } |
| } else { |
| // Flow path has not yet been installed to switches so save the |
| // packet out for later |
| log.debug("Put a packet into the waitng list. flowId {}", existingFlow.intentId); |
| waitingPackets.put(existingFlow.intentId, new PacketToPush(po, sw.getId())); |
| } |
| return; |
| } |
| |
| log.debug("Adding new flow between {} at {} and {} at {}", |
| new Object[]{srcMacAddress, srcSwitchPort, dstMacAddress, dstSwitchPort}); |
| |
| String intentId = callerId + ":" + controllerRegistryService.getNextUniqueId(); |
| IntentOperationList operations = new IntentOperationList(); |
| ShortestPathIntent intent = new ShortestPathIntent(intentId, |
| sw.getId(), pi.getInPort(), srcMacAddress.toLong(), |
| destinationDpid, destinationPort, dstMacAddress.toLong()); |
| IntentOperation.Operator operator = IntentOperation.Operator.ADD; |
| operations.add(operator, intent); |
| pathRuntime.executeIntentOperations(operations); |
| |
| OFPacketOut po = constructPacketOut(pi, sw); |
| |
| // Add to waiting lists |
| pendingFlows.put(pathspec, new PushedFlow(intentId)); |
| log.debug("Put a Path {} in the pending flow, intent ID {}", pathspec, intentId); |
| waitingPackets.put(intentId, new PacketToPush(po, sw.getId())); |
| log.debug("Put a Packet in the wating list. related pathspec {}", pathspec); |
| |
| } |
| } |
| |
| private OFPacketOut constructPacketOut(OFPacketIn pi, IOFSwitch sw) { |
| OFPacketOut po = new OFPacketOut(); |
| po.setInPort(OFPort.OFPP_NONE) |
| .setInPort(pi.getInPort()) |
| .setActions(new ArrayList<OFAction>()) |
| .setLengthU(OFPacketOut.MINIMUM_LENGTH); |
| |
| if (sw.getBuffers() == 0) { |
| po.setBufferId(OFPacketOut.BUFFER_ID_NONE) |
| .setPacketData(pi.getPacketData()) |
| .setLengthU(po.getLengthU() + po.getPacketData().length); |
| } else { |
| po.setBufferId(pi.getBufferId()); |
| } |
| |
| return po; |
| } |
| |
| @Override |
| public void flowsInstalled(Collection<FlowPath> installedFlowPaths) { |
| } |
| |
| @Override |
| public void flowRemoved(FlowPath removedFlowPath) { |
| } |
| |
| public void flowRemoved(PathIntent removedIntent) { |
| if (log.isTraceEnabled()) { |
| log.trace("Path {} was removed", removedIntent.getParentIntent().getId()); |
| } |
| |
| ShortestPathIntent spfIntent = (ShortestPathIntent) removedIntent.getParentIntent(); |
| MACAddress srcMacAddress = MACAddress.valueOf(spfIntent.getSrcMac()); |
| MACAddress dstMacAddress = MACAddress.valueOf(spfIntent.getDstMac()); |
| Path removedPath = new Path(srcMacAddress, dstMacAddress); |
| |
| synchronized (lock) { |
| // There *shouldn't* be any packets queued if the flow has |
| // just been removed. |
| List<PacketToPush> packets = waitingPackets.removeAll(spfIntent.getId()); |
| if (!packets.isEmpty()) { |
| log.warn("Removed flow {} has packets queued.", spfIntent.getId()); |
| } |
| pendingFlows.remove(removedPath); |
| log.debug("Removed from the pendingFlow: Path {}, Flow ID {}", removedPath, spfIntent.getId()); |
| } |
| } |
| |
| private void flowInstalled(PathIntent installedPath) { |
| if (log.isTraceEnabled()) { |
| log.trace("Path {} was installed", installedPath.getParentIntent().getId()); |
| } |
| |
| ShortestPathIntent spfIntent = (ShortestPathIntent) installedPath.getParentIntent(); |
| MACAddress srcMacAddress = MACAddress.valueOf(spfIntent.getSrcMac()); |
| MACAddress dstMacAddress = MACAddress.valueOf(spfIntent.getDstMac()); |
| Path path = new Path(srcMacAddress, dstMacAddress); |
| log.debug("Path spec {}", path); |
| |
| // TODO waiting packets should time out. We could request a path that |
| // can't be installed right now because of a network partition. The path |
| // may eventually be installed, but we may have received thousands of |
| // packets in the meantime and probably don't want to send very old packets. |
| |
| List<PacketToPush> packets = null; |
| net.onrc.onos.core.topology.Path graphPath = installedPath.getPath(); |
| |
| log.debug("path{}", graphPath); |
| Short outPort = graphPath.get(0).getSrc().getNumber().shortValue(); |
| |
| PushedFlow existingFlow = null; |
| |
| synchronized (lock) { |
| existingFlow = pendingFlows.get(path); |
| |
| if (existingFlow != null) { |
| existingFlow.installed = true; |
| existingFlow.firstOutPort = outPort; |
| } else { |
| log.debug("ExistingFlow {} is null", path); |
| return; |
| } |
| |
| //Check both existing flow are installed status. |
| if (existingFlow.installed) { |
| packets = waitingPackets.removeAll(existingFlow.intentId); |
| if (log.isDebugEnabled()) { |
| log.debug("removed my packets {} to push from waitingPackets. outPort {} size {}", |
| existingFlow.intentId, existingFlow.firstOutPort, packets.size()); |
| } |
| } else { |
| log.debug("Forward or reverse flows hasn't been pushed yet. return"); |
| return; |
| } |
| } |
| |
| for (PacketToPush packet : packets) { |
| log.debug("Start packetToPush to sw {}, outPort {}, path {}", packet.dpid, existingFlow.firstOutPort, path); |
| IOFSwitch sw = floodlightProvider.getSwitches().get(packet.dpid); |
| sendPacketOut(sw, packet.packet, existingFlow.firstOutPort); |
| } |
| } |
| |
| private void sendPacketOut(IOFSwitch sw, OFPacketOut po, short outPort) { |
| po.getActions().add(new OFActionOutput(outPort)); |
| po.setActionsLength((short) |
| (po.getActionsLength() + OFActionOutput.MINIMUM_LENGTH)); |
| po.setLengthU(po.getLengthU() + OFActionOutput.MINIMUM_LENGTH); |
| |
| flowPusher.add(sw, po); |
| } |
| |
| @Override |
| public void entryAdded(IntentStateList value) { |
| entryUpdated(value); |
| |
| } |
| |
| @Override |
| public void entryRemoved(IntentStateList value) { |
| //no-op |
| } |
| |
| @Override |
| public void entryUpdated(IntentStateList value) { |
| for (Entry<String, IntentState> entry : value.entrySet()) { |
| log.debug("path intent key {}, value {}", entry.getKey(), entry.getValue()); |
| PathIntent pathIntent = (PathIntent) intentMap.getIntent(entry.getKey()); |
| if (pathIntent == null) { |
| continue; |
| } |
| |
| if (!(pathIntent.getParentIntent() instanceof ShortestPathIntent)) { |
| continue; |
| } |
| |
| IntentState state = entry.getValue(); |
| switch (state) { |
| case INST_REQ: |
| break; |
| case INST_ACK: |
| flowInstalled(pathIntent); |
| break; |
| case INST_NACK: |
| break; |
| case DEL_REQ: |
| break; |
| case DEL_ACK: |
| flowRemoved(pathIntent); |
| break; |
| case DEL_PENDING: |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |