| /* |
| * Copyright 2016-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.store; |
| |
| import com.googlecode.concurrenttrees.common.KeyValuePair; |
| import com.googlecode.concurrenttrees.radix.node.concrete.DefaultByteArrayNodeFactory; |
| import com.googlecode.concurrenttrees.radixinverted.ConcurrentInvertedRadixTree; |
| import com.googlecode.concurrenttrees.radixinverted.InvertedRadixTree; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onosproject.routeservice.InternalRouteEvent; |
| import org.onosproject.routeservice.Route; |
| import org.onosproject.routeservice.RouteSet; |
| import org.onosproject.routeservice.RouteStore; |
| import org.onosproject.routeservice.RouteStoreDelegate; |
| import org.onosproject.routeservice.RouteTableId; |
| import org.onosproject.routeservice.RouteTools; |
| import org.onosproject.store.AbstractStore; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Route store based on in-memory storage. |
| */ |
| public class LocalRouteStore extends AbstractStore<InternalRouteEvent, RouteStoreDelegate> |
| implements RouteStore { |
| |
| private Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private Map<RouteTableId, RouteTable> routeTables; |
| private static final RouteTableId IPV4 = new RouteTableId("ipv4"); |
| private static final RouteTableId IPV6 = new RouteTableId("ipv6"); |
| |
| /** |
| * Sets up local route store. |
| */ |
| public void activate() { |
| routeTables = new ConcurrentHashMap<>(); |
| |
| routeTables.put(IPV4, new RouteTable(IPV4)); |
| routeTables.put(IPV6, new RouteTable(IPV6)); |
| |
| log.info("Started"); |
| } |
| |
| /** |
| * Cleans up local route store. |
| */ |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void updateRoute(Route route) { |
| getDefaultRouteTable(route).update(route); |
| } |
| |
| @Override |
| public void removeRoute(Route route) { |
| getDefaultRouteTable(route).remove(route); |
| } |
| |
| @Override |
| public Set<RouteTableId> getRouteTables() { |
| return routeTables.keySet(); |
| } |
| |
| @Override |
| public Collection<RouteSet> getRoutes(RouteTableId table) { |
| RouteTable routeTable = routeTables.get(table); |
| if (routeTable != null) { |
| return routeTable.getRouteSets(); |
| } |
| return null; |
| } |
| |
| @Override |
| public Collection<Route> getRoutesForNextHop(IpAddress ip) { |
| return getDefaultRouteTable(ip).getRoutesForNextHop(ip); |
| } |
| |
| @Override |
| public RouteSet getRoutes(IpPrefix prefix) { |
| return getDefaultRouteTable(prefix.address()).getRoutes(prefix); |
| } |
| |
| private RouteTable getDefaultRouteTable(Route route) { |
| return getDefaultRouteTable(route.prefix().address()); |
| } |
| |
| private RouteTable getDefaultRouteTable(IpAddress ip) { |
| RouteTableId routeTableId = (ip.isIp4()) ? IPV4 : IPV6; |
| return routeTables.get(routeTableId); |
| } |
| |
| /** |
| * Route table into which routes can be placed. |
| */ |
| private class RouteTable { |
| private final InvertedRadixTree<Route> routeTable; |
| private final Map<IpPrefix, Route> routes = new ConcurrentHashMap<>(); |
| private final RouteTableId id; |
| |
| /** |
| * Creates a new route table. |
| */ |
| public RouteTable(RouteTableId id) { |
| this.id = checkNotNull(id); |
| routeTable = new ConcurrentInvertedRadixTree<>( |
| new DefaultByteArrayNodeFactory()); |
| } |
| |
| /** |
| * Adds or updates the route in the route table. |
| * |
| * @param route route to update |
| */ |
| public void update(Route route) { |
| synchronized (this) { |
| Route oldRoute = routes.put(route.prefix(), route); |
| |
| // No need to proceed if the new route is the same |
| if (route.equals(oldRoute)) { |
| return; |
| } |
| |
| routeTable.put(RouteTools.createBinaryString(route.prefix()), route); |
| |
| notifyDelegate(new InternalRouteEvent( |
| InternalRouteEvent.Type.ROUTE_ADDED, singletonRouteSet(route))); |
| } |
| } |
| |
| /** |
| * Removes the route from the route table. |
| * |
| * @param route route to remove |
| */ |
| public void remove(Route route) { |
| synchronized (this) { |
| Route removed = routes.remove(route.prefix()); |
| routeTable.remove(RouteTools.createBinaryString(route.prefix())); |
| |
| if (removed != null) { |
| notifyDelegate(new InternalRouteEvent( |
| InternalRouteEvent.Type.ROUTE_REMOVED, emptyRouteSet(route.prefix()))); |
| } |
| } |
| } |
| |
| /** |
| * Returns the routes pointing to a particular next hop. |
| * |
| * @param ip next hop IP address |
| * @return routes for the next hop |
| */ |
| public Collection<Route> getRoutesForNextHop(IpAddress ip) { |
| return routes.values() |
| .stream() |
| .filter(route -> route.nextHop().equals(ip)) |
| .collect(Collectors.toSet()); |
| } |
| |
| public RouteSet getRoutes(IpPrefix prefix) { |
| Route route = routes.get(prefix); |
| if (route != null) { |
| return singletonRouteSet(route); |
| } |
| return null; |
| } |
| |
| public Collection<RouteSet> getRouteSets() { |
| return routes.values().stream() |
| .map(this::singletonRouteSet) |
| .collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Returns all routes in the route table. |
| * |
| * @return all routes |
| */ |
| public Collection<Route> getRoutes() { |
| Iterator<KeyValuePair<Route>> it = |
| routeTable.getKeyValuePairsForKeysStartingWith("").iterator(); |
| |
| List<Route> routes = new LinkedList<>(); |
| |
| while (it.hasNext()) { |
| KeyValuePair<Route> entry = it.next(); |
| routes.add(entry.getValue()); |
| } |
| |
| return routes; |
| } |
| |
| /** |
| * Performs a longest prefix match with the given IP in the route table. |
| * |
| * @param ip IP address to look up |
| * @return most specific prefix containing the given |
| */ |
| public Route longestPrefixMatch(IpAddress ip) { |
| Iterable<Route> prefixes = |
| routeTable.getValuesForKeysPrefixing(RouteTools.createBinaryString(ip.toIpPrefix())); |
| |
| Iterator<Route> it = prefixes.iterator(); |
| |
| Route route = null; |
| while (it.hasNext()) { |
| route = it.next(); |
| } |
| |
| return route; |
| } |
| |
| private RouteSet singletonRouteSet(Route route) { |
| return new RouteSet(id, route.prefix(), Collections.singleton(route)); |
| } |
| |
| private RouteSet emptyRouteSet(IpPrefix prefix) { |
| return new RouteSet(id, prefix, Collections.emptySet()); |
| } |
| } |
| |
| } |