| /* |
| * Copyright 2020-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.t3.api; |
| |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onosproject.routeservice.ResolvedRoute; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Represents Network Information Base (NIB) for routes |
| * and supports alternative functions to |
| * {@link org.onosproject.routeservice.RouteService} for offline data. |
| */ |
| public class RouteNib { |
| |
| // TODO with method optimization, store into subdivided structures at the first load |
| // unresolved Route is treated as ResolvedRoute with nextHopMac null |
| Set<ResolvedRoute> routes; |
| |
| // use the singleton helper to create the instance |
| protected RouteNib() { |
| } |
| |
| /** |
| * Sets a set of routes. |
| * |
| * @param routes route set |
| */ |
| public void setRoutes(Set<ResolvedRoute> routes) { |
| this.routes = routes; |
| } |
| |
| /** |
| * Returns the set of routes. |
| * |
| * @return route set |
| */ |
| public Set<ResolvedRoute> getRoutes() { |
| return routes; |
| } |
| |
| /** |
| * Performs a longest prefix lookup on the given IP address. |
| * |
| * @param ip IP address to look up |
| * @return most specific matching route, if one exists |
| */ |
| public Optional<ResolvedRoute> longestPrefixLookup(IpAddress ip) { |
| return routes.stream() |
| .filter(r -> r.prefix().contains(ip)) |
| .max(Comparator.comparing(r -> r.prefix().prefixLength())); |
| } |
| |
| /** |
| * Returns all resolved routes stored for the given prefix, including the |
| * best selected route. |
| * |
| * @param prefix IP prefix to look up routes for |
| * @return all stored resolved routes for this prefix |
| */ |
| public Collection<ResolvedRoute> getAllResolvedRoutes(IpPrefix prefix) { |
| return routes.stream() |
| .filter(r -> r.prefix().contains(prefix) |
| && r.nextHopMac() != null |
| && r.nextHopVlan() != null) |
| .collect(Collectors.toCollection(ArrayList::new)); |
| } |
| |
| /** |
| * Returns the singleton instance of multicast routes NIB. |
| * |
| * @return instance of multicast routes NIB |
| */ |
| public static RouteNib getInstance() { |
| return RouteNib.SingletonHelper.INSTANCE; |
| } |
| |
| private static class SingletonHelper { |
| private static final RouteNib INSTANCE = new RouteNib(); |
| } |
| |
| } |