| /* |
| * Copyright 2017-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.routeservice.impl; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.routeservice.InternalRouteEvent; |
| import org.onosproject.routeservice.ResolvedRoute; |
| import org.onosproject.routeservice.Route; |
| import org.onosproject.routeservice.RouteAdminService; |
| import org.onosproject.routeservice.RouteEvent; |
| import org.onosproject.routeservice.RouteInfo; |
| import org.onosproject.routeservice.RouteListener; |
| import org.onosproject.routeservice.RouteService; |
| import org.onosproject.routeservice.RouteSet; |
| import org.onosproject.routeservice.RouteStore; |
| import org.onosproject.routeservice.RouteStoreDelegate; |
| import org.onosproject.routeservice.RouteTableId; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.host.HostEvent; |
| import org.onosproject.net.host.HostListener; |
| import org.onosproject.net.host.HostService; |
| import org.onosproject.store.service.StorageService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.annotation.concurrent.GuardedBy; |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.stream.Collectors; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| |
| /** |
| * Implementation of the unicast route service. |
| */ |
| @Service |
| @Component |
| public class RouteManager implements RouteService, RouteAdminService { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private RouteStoreDelegate delegate = new InternalRouteStoreDelegate(); |
| private InternalHostListener hostListener = new InternalHostListener(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RouteStore routeStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostService hostService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| private ResolvedRouteStore resolvedRouteStore; |
| |
| private RouteMonitor routeMonitor; |
| |
| @GuardedBy(value = "this") |
| private Map<RouteListener, ListenerQueue> listeners = new HashMap<>(); |
| |
| private ThreadFactory threadFactory; |
| |
| @Activate |
| protected void activate() { |
| routeMonitor = new RouteMonitor(this, clusterService, storageService); |
| threadFactory = groupedThreads("onos/route", "listener-%d", log); |
| |
| resolvedRouteStore = new DefaultResolvedRouteStore(); |
| |
| routeStore.setDelegate(delegate); |
| hostService.addListener(hostListener); |
| |
| routeStore.getRouteTables().stream() |
| .flatMap(id -> routeStore.getRoutes(id).stream()) |
| .forEach(this::resolve); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| routeMonitor.shutdown(); |
| listeners.values().forEach(ListenerQueue::stop); |
| |
| routeStore.unsetDelegate(delegate); |
| hostService.removeListener(hostListener); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * In a departure from other services in ONOS, calling addListener will |
| * cause all current routes to be pushed to the listener before any new |
| * events are sent. This allows a listener to easily get the exact set of |
| * routes without worrying about missing any. |
| * |
| * @param listener listener to be added |
| */ |
| @Override |
| public void addListener(RouteListener listener) { |
| synchronized (this) { |
| log.debug("Synchronizing current routes to new listener"); |
| ListenerQueue l = createListenerQueue(listener); |
| resolvedRouteStore.getRouteTables().stream() |
| .map(resolvedRouteStore::getRoutes) |
| .flatMap(Collection::stream) |
| .map(route -> new RouteEvent(RouteEvent.Type.ROUTE_ADDED, route, |
| resolvedRouteStore.getAllRoutes(route.prefix()))) |
| .forEach(l::post); |
| |
| listeners.put(listener, l); |
| |
| l.start(); |
| log.debug("Route synchronization complete"); |
| } |
| } |
| |
| @Override |
| public void removeListener(RouteListener listener) { |
| synchronized (this) { |
| ListenerQueue l = listeners.remove(listener); |
| if (l != null) { |
| l.stop(); |
| } |
| } |
| } |
| |
| /** |
| * Posts an event to all listeners. |
| * |
| * @param event event |
| */ |
| private void post(RouteEvent event) { |
| if (event != null) { |
| log.debug("Sending event {}", event); |
| synchronized (this) { |
| listeners.values().forEach(l -> l.post(event)); |
| } |
| } |
| } |
| |
| private Collection<Route> reformatRoutes(Collection<RouteSet> routeSets) { |
| return routeSets.stream().flatMap(r -> r.routes().stream()).collect(Collectors.toList()); |
| } |
| |
| public Collection<RouteTableId> getRouteTables() { |
| return routeStore.getRouteTables(); |
| } |
| |
| @Override |
| public Collection<RouteInfo> getRoutes(RouteTableId id) { |
| return routeStore.getRoutes(id).stream() |
| .map(routeSet -> new RouteInfo(routeSet.prefix(), |
| resolvedRouteStore.getRoute(routeSet.prefix()).orElse(null), resolveRouteSet(routeSet))) |
| .collect(Collectors.toList()); |
| } |
| |
| private Set<ResolvedRoute> resolveRouteSet(RouteSet routeSet) { |
| return routeSet.routes().stream() |
| .map(this::tryResolve) |
| .collect(Collectors.toSet()); |
| } |
| |
| private ResolvedRoute tryResolve(Route route) { |
| ResolvedRoute resolvedRoute = resolve(route); |
| if (resolvedRoute == null) { |
| resolvedRoute = new ResolvedRoute(route, null, null); |
| } |
| return resolvedRoute; |
| } |
| |
| @Override |
| public Optional<ResolvedRoute> longestPrefixLookup(IpAddress ip) { |
| return resolvedRouteStore.longestPrefixMatch(ip); |
| } |
| |
| @Override |
| public void update(Collection<Route> routes) { |
| synchronized (this) { |
| routes.forEach(route -> { |
| log.debug("Received update {}", route); |
| routeStore.updateRoute(route); |
| }); |
| } |
| } |
| |
| @Override |
| public void withdraw(Collection<Route> routes) { |
| synchronized (this) { |
| routes.forEach(route -> { |
| log.debug("Received withdraw {}", route); |
| routeStore.removeRoute(route); |
| }); |
| } |
| } |
| |
| @Override |
| public Route longestPrefixMatch(IpAddress ip) { |
| return longestPrefixLookup(ip) |
| .map(ResolvedRoute::route) |
| .orElse(null); |
| } |
| |
| private ResolvedRoute resolve(Route route) { |
| hostService.startMonitoringIp(route.nextHop()); |
| Set<Host> hosts = hostService.getHostsByIp(route.nextHop()); |
| |
| Optional<Host> host = hosts.stream().findFirst(); |
| if (host.isPresent()) { |
| return new ResolvedRoute(route, host.get().mac(), host.get().vlan(), |
| host.get().location()); |
| } else { |
| return null; |
| } |
| } |
| |
| private ResolvedRoute decide(ResolvedRoute route1, ResolvedRoute route2) { |
| return Comparator.comparing(ResolvedRoute::nextHop) |
| .compare(route1, route2) <= 0 ? route1 : route2; |
| } |
| |
| private void store(ResolvedRoute route, Set<ResolvedRoute> alternatives) { |
| post(resolvedRouteStore.updateRoute(route, alternatives)); |
| } |
| |
| private void remove(IpPrefix prefix) { |
| post(resolvedRouteStore.removeRoute(prefix)); |
| } |
| |
| private void resolve(RouteSet routes) { |
| Set<ResolvedRoute> resolvedRoutes = routes.routes().stream() |
| .map(this::resolve) |
| .filter(Objects::nonNull) |
| .collect(Collectors.toSet()); |
| |
| Optional<ResolvedRoute> bestRoute = resolvedRoutes.stream() |
| .reduce(this::decide); |
| |
| if (bestRoute.isPresent()) { |
| store(bestRoute.get(), resolvedRoutes); |
| } else { |
| remove(routes.prefix()); |
| } |
| } |
| |
| private void hostUpdated(Host host) { |
| hostChanged(host); |
| } |
| |
| private void hostRemoved(Host host) { |
| hostChanged(host); |
| } |
| |
| private void hostChanged(Host host) { |
| synchronized (this) { |
| host.ipAddresses().stream() |
| .flatMap(ip -> routeStore.getRoutesForNextHop(ip).stream()) |
| .map(route -> routeStore.getRoutes(route.prefix())) |
| .forEach(this::resolve); |
| } |
| } |
| |
| /** |
| * Creates a new listener queue. |
| * |
| * @param listener route listener |
| * @return listener queue |
| */ |
| ListenerQueue createListenerQueue(RouteListener listener) { |
| return new DefaultListenerQueue(listener); |
| } |
| |
| /** |
| * Default route listener queue. |
| */ |
| private class DefaultListenerQueue implements ListenerQueue { |
| |
| private final ExecutorService executorService; |
| private final BlockingQueue<RouteEvent> queue; |
| private final RouteListener listener; |
| |
| /** |
| * Creates a new listener queue. |
| * |
| * @param listener route listener to queue updates for |
| */ |
| public DefaultListenerQueue(RouteListener listener) { |
| this.listener = listener; |
| queue = new LinkedBlockingQueue<>(); |
| executorService = newSingleThreadExecutor(threadFactory); |
| } |
| |
| @Override |
| public void post(RouteEvent event) { |
| queue.add(event); |
| } |
| |
| @Override |
| public void start() { |
| executorService.execute(this::poll); |
| } |
| |
| @Override |
| public void stop() { |
| executorService.shutdown(); |
| } |
| |
| private void poll() { |
| while (true) { |
| try { |
| listener.event(queue.take()); |
| } catch (InterruptedException e) { |
| log.info("Route listener event thread shutting down: {}", e.getMessage()); |
| break; |
| } catch (Exception e) { |
| log.warn("Exception during route event handler", e); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Delegate to receive events from the route store. |
| */ |
| private class InternalRouteStoreDelegate implements RouteStoreDelegate { |
| @Override |
| public void notify(InternalRouteEvent event) { |
| switch (event.type()) { |
| case ROUTE_ADDED: |
| resolve(event.subject()); |
| break; |
| case ROUTE_REMOVED: |
| resolve(event.subject()); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Internal listener for host events. |
| */ |
| private class InternalHostListener implements HostListener { |
| @Override |
| public void event(HostEvent event) { |
| switch (event.type()) { |
| case HOST_ADDED: |
| case HOST_UPDATED: |
| hostUpdated(event.subject()); |
| break; |
| case HOST_REMOVED: |
| hostRemoved(event.subject()); |
| break; |
| case HOST_MOVED: |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| } |