sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 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 | package org.onosproject.ospf.controller; |
| 17 | |
| 18 | import org.onlab.packet.Ip4Address; |
| 19 | |
| 20 | import java.util.List; |
| 21 | |
| 22 | /** |
| 23 | * Representation of an OSPF area. OSPF areas are collections of network segments. |
| 24 | * The configuration of OSPF area consists of assigning an area id to each network segment. |
| 25 | * Each area has its own link state database. |
| 26 | */ |
| 27 | public interface OspfArea { |
| 28 | |
| 29 | /** |
| 30 | * Gets the router id associated with the area. |
| 31 | * |
| 32 | * @return router id |
| 33 | */ |
| 34 | Ip4Address routerId(); |
| 35 | |
| 36 | /** |
| 37 | * Sets the router id for this area. |
| 38 | * |
| 39 | * @param routerId router's ip address |
| 40 | */ |
| 41 | void setRouterId(Ip4Address routerId); |
| 42 | |
| 43 | /** |
| 44 | * Gets the area id. |
| 45 | * |
| 46 | * @return area id |
| 47 | */ |
| 48 | Ip4Address areaId(); |
| 49 | |
| 50 | /** |
| 51 | * Sets the area id. |
| 52 | * |
| 53 | * @param areaId area id as an IPv4 address |
| 54 | */ |
| 55 | void setAreaId(Ip4Address areaId); |
| 56 | |
| 57 | /** |
| 58 | * Gets the LSDB instance for this area. |
| 59 | * |
| 60 | * @return LSDB instance for this area |
| 61 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 62 | OspfLsdb database(); |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 63 | |
| 64 | /** |
| 65 | * Checks whether an instance of the given LSA exists in the database. |
| 66 | * |
| 67 | * @param lookupLsa LSA instance to lookup |
| 68 | * @return LSA wrapper instance which contains the LSA |
| 69 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 70 | LsaWrapper lsaLookup(OspfLsa lookupLsa); |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 71 | |
| 72 | /** |
| 73 | * Initializes link state database, this acts as a place holder for storing the received LSA. |
| 74 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 75 | void initializeDb(); |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 76 | |
| 77 | /** |
| 78 | * Sets the options value. |
| 79 | * |
| 80 | * @param options integer value |
| 81 | */ |
| 82 | void setOptions(int options); |
| 83 | |
| 84 | /** |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 85 | * Gets external routing capability. |
| 86 | * This indicates Whether AS-external-LSAs will be flooded into/throughout the area. |
| 87 | * |
| 88 | * @return true if external routing capable, else false |
| 89 | */ |
| 90 | boolean isExternalRoutingCapability(); |
| 91 | |
| 92 | /** |
| 93 | * Sets external routing capability. |
| 94 | * This indicates Whether AS-external-LSAs will be flooded into/throughout the area. |
| 95 | * |
| 96 | * @param externalRoutingCapability true if external routing capable, else false |
| 97 | */ |
| 98 | void setExternalRoutingCapability(boolean externalRoutingCapability); |
| 99 | |
| 100 | /** |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 101 | * Gets if the router is opaque enabled or not. |
| 102 | * This indicates whether the router accepts opaque LSA. |
| 103 | * |
| 104 | * @return true if opaque enabled else false |
| 105 | */ |
| 106 | boolean isOpaqueEnabled(); |
| 107 | |
| 108 | /** |
| 109 | * Gets the list of interfaces attached to this area. |
| 110 | * |
| 111 | * @return list of interfaces |
| 112 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 113 | List<OspfInterface> ospfInterfaceList(); |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 114 | |
| 115 | /** |
| 116 | * Sets the list of interfaces attached to this area. |
| 117 | * |
| 118 | * @param interfacesLst list of interface instances |
| 119 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 120 | void setOspfInterfaceList(List<OspfInterface> interfacesLst); |
sunish vk | 30637eb | 2016-02-16 15:19:32 +0530 | [diff] [blame] | 121 | |
| 122 | /** |
| 123 | * Gets the options value, which indicates the supported optional capabilities. |
| 124 | * |
| 125 | * @return options value |
| 126 | */ |
| 127 | int options(); |
| 128 | |
| 129 | /** |
| 130 | * Gets the opaque enabled options value, which indicates support of opaque capabilities. |
| 131 | * |
| 132 | * @return opaque enabled options value |
| 133 | */ |
| 134 | int opaqueEnabledOptions(); |
| 135 | |
| 136 | /** |
| 137 | * Sets opaque enabled to true or false, which indicates whether the router accepts opaque LSA. |
| 138 | * |
| 139 | * @param isOpaqueEnable true if opaque enabled else false |
| 140 | */ |
| 141 | void setIsOpaqueEnabled(boolean isOpaqueEnable); |
| 142 | |
| 143 | /** |
| 144 | * Refreshes areas, by sending a router LSA and network LSA (in case of DR). |
| 145 | * with a new sequence number. |
| 146 | * |
| 147 | * @param ospfInterface interface instance |
| 148 | * @throws Exception might throw exception |
| 149 | */ |
| 150 | void refreshArea(OspfInterface ospfInterface) throws Exception; |
| 151 | |
| 152 | /** |
| 153 | * Verifies no neighbor is in exchange process. |
| 154 | * |
| 155 | * @return boolean indicating that there is no Neighbor in Database Exchange |
| 156 | */ |
| 157 | boolean noNeighborInLsaExchangeProcess(); |
| 158 | |
| 159 | /** |
| 160 | * Checks whether an instance of the given LSA exists in the database belonging to this area. |
| 161 | * If so return true else false. |
| 162 | * |
| 163 | * @param lsa1 LSA instance to compare |
| 164 | * @param lsa2 LSA instance to compare |
| 165 | * @return "same" if both instances are same, "latest" if lsa1 is latest, or "old" if lsa1 is old |
| 166 | */ |
| 167 | String isNewerOrSameLsa(OspfLsa lsa1, OspfLsa lsa2); |
| 168 | |
| 169 | /** |
| 170 | * Whenever we receive an LSA with max age - we put it in the max age bin. |
| 171 | * This is later used to flush LSAs out of the routing domain. |
| 172 | * |
| 173 | * @param key key to add it to LSDB |
| 174 | * @param wrapper LSA wrapper instance |
| 175 | */ |
| 176 | void addLsaToMaxAgeBin(String key, LsaWrapper wrapper); |
| 177 | |
| 178 | /** |
| 179 | * Whenever an LSA is being flushed out or reaches max age, it must be stopped from aging. |
| 180 | * This achieved by removing it from bin. |
| 181 | * |
| 182 | * @param lsaWrapper the LSA wrapper instance to delete |
| 183 | */ |
| 184 | void removeLsaFromBin(LsaWrapper lsaWrapper); |
| 185 | |
| 186 | /** |
| 187 | * Adds the received LSA to LSDB, this method creates an LSA wrapper for the LSA. |
| 188 | * Also adds it to the LSDB of the area. This method is specifically called for |
| 189 | * the self originated LSAs. |
| 190 | * |
| 191 | * @param ospfLsa LSA instance |
| 192 | * @param isSelfOriginated true if the LSA is self originated else false |
| 193 | * @param ospfInterface interface instance |
| 194 | * @throws Exception might throws exception |
| 195 | */ |
| 196 | void addLsa(OspfLsa ospfLsa, boolean isSelfOriginated, OspfInterface ospfInterface) |
| 197 | throws Exception; |
| 198 | |
| 199 | /** |
| 200 | * Adds the received LSA to LSDB,this method creates an LSA wrapper for the LSA. |
| 201 | * Adds it to the LSDB of the area. |
| 202 | * |
| 203 | * @param ospfLsa LSA instance |
| 204 | * @param ospfInterface interface instance |
| 205 | * @throws Exception might throws exception |
| 206 | */ |
| 207 | void addLsa(OspfLsa ospfLsa, OspfInterface ospfInterface) throws Exception; |
| 208 | |
| 209 | /** |
| 210 | * Sets router sequence number for router LSA. |
| 211 | * |
| 212 | * @param newSequenceNumber sequence number |
| 213 | */ |
| 214 | void setDbRouterSequenceNumber(long newSequenceNumber); |
| 215 | |
| 216 | /** |
| 217 | * Gets LSA header of all types of LSAs present in the link state database. |
| 218 | * |
| 219 | * @param excludeMaxAgeLsa need to include(true) or exclude(false) max age LSA |
| 220 | * @param isOpaqueCapable need to include(true) or exclude(false) type 10 Opaque LSA |
| 221 | * @return list of LSA header in the LSDB |
| 222 | */ |
| 223 | List getLsaHeaders(boolean excludeMaxAgeLsa, boolean isOpaqueCapable); |
| 224 | |
| 225 | /** |
| 226 | * Gets the LSA wrapper from link state database based on the parameters passed. |
| 227 | * |
| 228 | * @param lsType type of LSA to form the key |
| 229 | * @param linkStateID link state id to form the key |
| 230 | * @param advertisingRouter advertising router to form the key |
| 231 | * @return LSA wrapper instance which contains the LSA |
| 232 | * @throws Exception might throws exception |
| 233 | */ |
| 234 | LsaWrapper getLsa(int lsType, String linkStateID, String advertisingRouter) throws Exception; |
| 235 | |
| 236 | } |