Michele Santuari | ce25649 | 2017-06-23 14:44:01 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.drivers.juniper; |
| 18 | |
| 19 | import com.google.common.annotations.Beta; |
| 20 | import org.onlab.packet.Ip4Address; |
| 21 | import org.onlab.packet.Ip4Prefix; |
| 22 | |
| 23 | import java.util.Objects; |
| 24 | |
| 25 | import static com.google.common.base.MoreObjects.toStringHelper; |
| 26 | import static org.onosproject.net.intent.Intent.DEFAULT_INTENT_PRIORITY; |
| 27 | |
| 28 | |
| 29 | /** |
| 30 | * Definition of a static route for the Juniper. |
| 31 | */ |
| 32 | @Beta |
| 33 | public class StaticRoute { |
| 34 | |
| 35 | /** |
| 36 | * Maximum metric value for the Juniper. |
| 37 | */ |
| 38 | private static final int BEST_STATIC_METRIC = 1; |
| 39 | |
| 40 | /** |
| 41 | * Max FlowRule priority that corresponds to the BEST_STATIC_METRIC of the Juniper. |
| 42 | * DEFAULT_INTENT_PRIORITY + DEFAULT_METRIC_STATIC_ROUTE - BEST_STATIC_METRIC |
| 43 | */ |
| 44 | private static final int MAX_FLOWRULE_PRIORITY_ACCEPTED = 104; |
| 45 | |
| 46 | /** |
| 47 | * Default static route metric. |
| 48 | */ |
| 49 | public static final int DEFAULT_METRIC_STATIC_ROUTE = 5; |
| 50 | |
| 51 | private final Ip4Prefix ipv4Dest; |
| 52 | private final Ip4Address nextHop; |
| 53 | private final int priority; |
| 54 | private final boolean localRoute; |
| 55 | |
| 56 | public StaticRoute(Ip4Prefix ipv4Dest, Ip4Address nextHop, boolean localRoute, int priority) { |
| 57 | this.ipv4Dest = ipv4Dest; |
| 58 | this.nextHop = nextHop; |
| 59 | this.priority = priority; |
| 60 | this.localRoute = localRoute; |
| 61 | } |
| 62 | |
| 63 | public StaticRoute(Ip4Prefix ipv4Dest, Ip4Address nextHop, boolean localRoute) { |
| 64 | this(ipv4Dest, nextHop, localRoute, DEFAULT_INTENT_PRIORITY); |
| 65 | } |
| 66 | |
| 67 | public Ip4Prefix ipv4Dst() { |
| 68 | return ipv4Dest; |
| 69 | } |
| 70 | |
| 71 | public Ip4Address nextHop() { |
| 72 | return nextHop; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Method to covert the priority into the Juniper metric. |
| 77 | * See https://goo.gl/ACo952. |
| 78 | * @return the metric for the Juniper |
| 79 | */ |
| 80 | public int getMetric() { |
| 81 | if (priority > MAX_FLOWRULE_PRIORITY_ACCEPTED) { |
| 82 | return BEST_STATIC_METRIC; |
| 83 | } |
| 84 | return DEFAULT_INTENT_PRIORITY + DEFAULT_METRIC_STATIC_ROUTE - priority; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Method to convert the Juniper metric into a priority. |
| 89 | * |
| 90 | * @param metric the metric to be converted |
| 91 | * @return the priority |
| 92 | */ |
| 93 | public static int toFlowRulePriority(int metric) { |
| 94 | return DEFAULT_INTENT_PRIORITY + DEFAULT_METRIC_STATIC_ROUTE - metric; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Directly attached routes are called local route. Such local routes are directly discovered by |
| 99 | * the router itself. |
| 100 | * |
| 101 | * @return true if it is a local route |
| 102 | */ |
| 103 | public boolean isLocalRoute() { |
| 104 | return localRoute; |
| 105 | } |
| 106 | |
| 107 | @Override |
| 108 | public boolean equals(Object obj) { |
| 109 | if (this == obj) { |
| 110 | return true; |
| 111 | } |
| 112 | if (obj instanceof StaticRoute) { |
| 113 | StaticRoute that = (StaticRoute) obj; |
| 114 | return Objects.equals(ipv4Dest, that.ipv4Dest) && |
| 115 | Objects.equals(nextHop, that.nextHop) && |
| 116 | Objects.equals(priority, that.priority) && |
| 117 | Objects.equals(localRoute, that.localRoute); |
| 118 | } |
| 119 | return false; |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public int hashCode() { |
| 124 | return Objects.hash(ipv4Dest, nextHop, priority, localRoute); |
| 125 | } |
| 126 | |
| 127 | @Override |
| 128 | public String toString() { |
| 129 | return toStringHelper(this) |
| 130 | .omitNullValues() |
| 131 | .addValue(localRoute ? "Local route" : null) |
| 132 | .add("IP address destination", ipv4Dest) |
| 133 | .add("Next Hop IP address", nextHop) |
| 134 | .add("Priority", priority) |
| 135 | .toString(); |
| 136 | } |
| 137 | } |