Kiran Ramachandra | 3d94a6c | 2016-02-17 16:57:03 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame^] | 2 | * Copyright 2016-present Open Networking Laboratory |
Kiran Ramachandra | 3d94a6c | 2016-02-17 16:57:03 +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.impl; |
| 17 | |
| 18 | import org.jboss.netty.channel.Channel; |
| 19 | import org.onlab.packet.Ip4Address; |
| 20 | import org.onlab.util.Bandwidth; |
| 21 | import org.onosproject.ospf.controller.DeviceInformation; |
| 22 | import org.onosproject.ospf.controller.LinkInformation; |
| 23 | import org.onosproject.ospf.controller.LsaWrapper; |
| 24 | import org.onosproject.ospf.controller.OspfArea; |
| 25 | import org.onosproject.ospf.controller.OspfDeviceTed; |
| 26 | import org.onosproject.ospf.controller.OspfInterface; |
| 27 | import org.onosproject.ospf.controller.OspfLinkTed; |
| 28 | import org.onosproject.ospf.controller.OspfLsa; |
| 29 | import org.onosproject.ospf.controller.OspfLsaType; |
| 30 | import org.onosproject.ospf.controller.OspfLsdb; |
| 31 | import org.onosproject.ospf.controller.OspfNbr; |
| 32 | import org.onosproject.ospf.controller.OspfNeighborState; |
| 33 | import org.onosproject.ospf.controller.OspfRouter; |
| 34 | import org.onosproject.ospf.controller.TopologyForDeviceAndLink; |
| 35 | import org.onosproject.ospf.controller.area.OspfAreaImpl; |
| 36 | import org.onosproject.ospf.controller.area.OspfInterfaceImpl; |
| 37 | import org.onosproject.ospf.controller.lsdb.LsaWrapperImpl; |
| 38 | import org.onosproject.ospf.controller.util.OspfInterfaceType; |
| 39 | import org.onosproject.ospf.protocol.lsa.LsaHeader; |
| 40 | import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader; |
| 41 | import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa10; |
| 42 | import org.onosproject.ospf.protocol.lsa.types.TopLevelTlv; |
| 43 | import org.onosproject.ospf.protocol.ospfpacket.OspfMessage; |
| 44 | import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader; |
| 45 | import org.onosproject.ospf.protocol.ospfpacket.subtype.LsRequestPacket; |
| 46 | import org.onosproject.ospf.protocol.ospfpacket.types.DdPacket; |
| 47 | import org.onosproject.ospf.protocol.ospfpacket.types.LsAcknowledge; |
| 48 | import org.onosproject.ospf.protocol.ospfpacket.types.LsRequest; |
| 49 | import org.onosproject.ospf.protocol.ospfpacket.types.LsUpdate; |
| 50 | import org.onosproject.ospf.protocol.util.ChecksumCalculator; |
| 51 | import org.onosproject.ospf.protocol.util.OspfInterfaceState; |
| 52 | import org.onosproject.ospf.protocol.util.OspfPacketType; |
| 53 | import org.onosproject.ospf.protocol.util.OspfParameters; |
| 54 | import org.onosproject.ospf.protocol.util.OspfUtil; |
| 55 | import org.slf4j.Logger; |
| 56 | import org.slf4j.LoggerFactory; |
| 57 | |
| 58 | import java.util.ArrayList; |
| 59 | import java.util.HashMap; |
| 60 | import java.util.Hashtable; |
| 61 | import java.util.Iterator; |
| 62 | import java.util.LinkedHashMap; |
| 63 | import java.util.List; |
| 64 | import java.util.ListIterator; |
| 65 | import java.util.Map; |
| 66 | import java.util.Set; |
| 67 | import java.util.concurrent.CopyOnWriteArrayList; |
| 68 | import java.util.concurrent.Executors; |
| 69 | import java.util.concurrent.ScheduledExecutorService; |
| 70 | import java.util.concurrent.TimeUnit; |
| 71 | |
| 72 | /** |
| 73 | * Represents an OSPF neighbor. |
| 74 | * The first thing an OSPF router must do is find its neighbors and form adjacency. |
| 75 | * Each neighbor that the router finds will be represented by this class. |
| 76 | */ |
| 77 | public class OspfNbrImpl implements OspfNbr { |
| 78 | private static final Logger log = LoggerFactory.getLogger(OspfNbrImpl.class); |
| 79 | private OspfNeighborState state; |
| 80 | private InternalRxmtDdPacket rxmtDdPacketTask; |
| 81 | private InternalInactivityTimeCheck inActivityTimeCheckTask; |
| 82 | private InternalFloodingTask floodingTask; |
| 83 | private InternalRxmtLsrPacket rxmtLsrPacketTask; |
| 84 | private ScheduledExecutorService exServiceRxmtLsr; |
| 85 | private ScheduledExecutorService exServiceFlooding; |
| 86 | private ScheduledExecutorService exServiceRxmtDDPacket; |
| 87 | private ScheduledExecutorService exServiceInActivity; |
| 88 | |
| 89 | private boolean floodingTimerScheduled = false; |
| 90 | private boolean rxmtLsrTimerScheduled = false; |
| 91 | private boolean rxmtDdPacketTimerScheduled = false; |
| 92 | private boolean inActivityTimerScheduled = false; |
| 93 | |
| 94 | /** |
| 95 | * When the two neighbors are exchanging databases, they form a master/slave relationship. |
| 96 | * The master sends the first Database Description Packet |
| 97 | */ |
| 98 | private int isMaster; |
| 99 | |
| 100 | /** |
| 101 | * The DD Sequence Number of the DD packet that is currently being sent to the neighbor. |
| 102 | */ |
| 103 | private long ddSeqNum; |
| 104 | |
| 105 | /** |
| 106 | * Another data structure for keeping information of the last received DD packet. |
| 107 | */ |
| 108 | private DdPacket lastDdPacket; |
| 109 | |
| 110 | /** |
| 111 | * Another data structure for keeping information of the last Sent DD packet. |
| 112 | */ |
| 113 | private DdPacket lastSentDdPacket; |
| 114 | |
| 115 | /** |
| 116 | * Another data structure for keeping information of the last Sent LSrequest packet. |
| 117 | */ |
| 118 | private LsRequest lastSentLsrPacket; |
| 119 | |
| 120 | /** |
| 121 | * The router ID of the Neighbor Router. |
| 122 | */ |
| 123 | private Ip4Address neighborId; |
| 124 | |
| 125 | /** |
| 126 | * The IP address of the neighboring router's interface to the attached network. |
| 127 | */ |
| 128 | private Ip4Address neighborIpAddr; |
| 129 | |
| 130 | /** |
| 131 | * The neighbor's IDEA of the designated router. |
| 132 | */ |
| 133 | private Ip4Address neighborDr; |
| 134 | |
| 135 | /** |
| 136 | * The neighbor's IDEA of the backup designated router. |
| 137 | */ |
| 138 | private Ip4Address neighborBdr; |
| 139 | |
| 140 | private int routerPriority; |
| 141 | private int routerDeadInterval; |
| 142 | |
| 143 | /** |
| 144 | * The list of LSAs that have to be flooded. |
| 145 | */ |
| 146 | private Map<String, OspfLsa> reTxList = new LinkedHashMap(); |
| 147 | |
| 148 | /** |
| 149 | * The list of LSAs that have been flooded but not yet acknowledged on this adjacency. |
| 150 | */ |
| 151 | private Map<String, OspfLsa> pendingReTxList = new LinkedHashMap(); |
| 152 | |
| 153 | /** |
| 154 | * List of LSAs which are failed to received ACK. |
| 155 | */ |
| 156 | private Map failedTxList = new HashMap(); |
| 157 | |
| 158 | /** |
| 159 | * The complete list of LSAs that make up the area link-state database, at the moment the. |
| 160 | * neighbor goes into Database Exchange state (EXCHANGE). |
| 161 | */ |
| 162 | private List<LsaHeader> ddSummaryList = new CopyOnWriteArrayList(); |
| 163 | |
| 164 | /** |
| 165 | * LSA Request List from Neighbor. |
| 166 | */ |
| 167 | private Hashtable lsReqList = new Hashtable(); |
| 168 | |
| 169 | /** |
| 170 | * The optional OSPF capabilities supported by the neighbor. |
| 171 | */ |
| 172 | private int options; |
| 173 | private boolean isOpaqueCapable; |
| 174 | |
| 175 | /** |
| 176 | * A link to the OSPF-Interface this Neighbor belongs to. |
| 177 | */ |
| 178 | private OspfInterface ospfInterface; |
| 179 | |
| 180 | /** |
| 181 | * A link to the OSPF-Area this Neighbor Data Structure belongs to. |
| 182 | */ |
| 183 | private OspfArea ospfArea; |
| 184 | private OspfInterfaceChannelHandler handler; |
| 185 | private List<TopLevelTlv> topLevelTlvs = new ArrayList<>(); |
| 186 | private List<DeviceInformation> deviceInformationList = new ArrayList<>(); |
| 187 | |
| 188 | private TopologyForDeviceAndLink topologyForDeviceAndLink; |
| 189 | |
| 190 | /** |
| 191 | * Creates an instance of Neighbor. |
| 192 | * |
| 193 | * @param paramOspfArea OSPF Area instance |
| 194 | * @param paramOspfInterface OSPF interface instance |
| 195 | * @param ipAddr IP address |
| 196 | * @param routerId router id |
| 197 | * @param options options |
| 198 | * @param handler channel handler instance |
| 199 | * @param topologyForDeviceAndLinkCommon topology for device and link instance |
| 200 | */ |
| 201 | public OspfNbrImpl(OspfArea paramOspfArea, OspfInterface paramOspfInterface, |
| 202 | Ip4Address ipAddr, Ip4Address routerId, int options, |
| 203 | OspfInterfaceChannelHandler handler, TopologyForDeviceAndLink topologyForDeviceAndLinkCommon) { |
| 204 | this.ospfArea = paramOspfArea; |
| 205 | this.ospfInterface = paramOspfInterface; |
| 206 | state = OspfNeighborState.DOWN; |
| 207 | isMaster = OspfUtil.NOT_MASTER; |
| 208 | ddSeqNum = OspfUtil.createRandomNumber(); |
| 209 | neighborIpAddr = ipAddr; |
| 210 | neighborId = routerId; |
| 211 | this.options = options; |
| 212 | lastDdPacket = new DdPacket(); |
| 213 | routerDeadInterval = paramOspfInterface.routerDeadIntervalTime(); |
| 214 | this.handler = handler; |
| 215 | this.topologyForDeviceAndLink = topologyForDeviceAndLinkCommon; |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Gets the IP address of this neighbor. |
| 220 | * |
| 221 | * @return the IP address of this neighbor |
| 222 | */ |
| 223 | public Ip4Address neighborIpAddr() { |
| 224 | return neighborIpAddr; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Gets the neighbor is opaque enabled or not. |
| 229 | * |
| 230 | * @return true if the neighbor is opaque enabled else false. |
| 231 | */ |
| 232 | public boolean isOpaqueCapable() { |
| 233 | return isOpaqueCapable; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Sets the neighbor is opaque enabled or not. |
| 238 | * |
| 239 | * @param isOpaqueCapable true if the neighbor is opaque enabledelse false |
| 240 | */ |
| 241 | public void setIsOpaqueCapable(boolean isOpaqueCapable) { |
| 242 | this.isOpaqueCapable = isOpaqueCapable; |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * Have seen a Neighbor, but the Neighbor doesn't know about me. |
| 247 | * |
| 248 | * @param ospfHello Hello Packet instance |
| 249 | * @param channel netty channel instance |
| 250 | */ |
| 251 | public void oneWayReceived(OspfMessage ospfHello, Channel channel) { |
| 252 | log.debug("OSPFNbr::oneWayReceived...!!!"); |
| 253 | stopInactivityTimeCheck(); |
| 254 | startInactivityTimeCheck(); |
| 255 | |
| 256 | if (state == OspfNeighborState.ATTEMPT) { |
| 257 | state = OspfNeighborState.INIT; |
| 258 | } else if (state == OspfNeighborState.DOWN) { |
| 259 | state = OspfNeighborState.INIT; |
| 260 | } |
| 261 | |
| 262 | if (state.getValue() >= OspfNeighborState.TWOWAY.getValue()) { |
| 263 | state = OspfNeighborState.INIT; |
| 264 | failedTxList.clear(); |
| 265 | ddSummaryList.clear(); |
| 266 | lsReqList.clear(); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Called when a DD OSPFMessage is received while state was INIT. |
| 272 | * |
| 273 | * @param ospfMessage ospf message instance |
| 274 | * @param channel netty channel instance |
| 275 | * @throws Exception might throws exception |
| 276 | */ |
| 277 | public void twoWayReceived(OspfMessage ospfMessage, Channel channel) throws Exception { |
| 278 | log.debug("OSPFNbr::twoWayReceived...!!!"); |
| 279 | stopInactivityTimeCheck(); |
| 280 | startInactivityTimeCheck(); |
| 281 | startFloodingTimer(channel); |
| 282 | |
| 283 | OspfPacketHeader packet = (OspfPacketHeader) ospfMessage; |
| 284 | if (state.getValue() <= OspfNeighborState.TWOWAY.getValue()) { |
| 285 | if (formAdjacencyOrNot()) { |
| 286 | state = OspfNeighborState.EXSTART; |
| 287 | |
| 288 | ddSeqNum++; |
| 289 | DdPacket ddPacket = new DdPacket(); |
| 290 | // seting OSPF Header |
| 291 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 292 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 293 | ddPacket.setRouterId(ospfArea.routerId()); |
| 294 | ddPacket.setAreaId(ospfArea.areaId()); |
| 295 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 296 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 297 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 298 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 299 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 300 | if (isOpaqueEnabled) { |
| 301 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 302 | } else { |
| 303 | ddPacket.setOptions(ospfArea.options()); |
| 304 | } |
| 305 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_SET); |
| 306 | ddPacket.setIsMore(OspfUtil.MORE_SET); |
| 307 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 308 | ddPacket.setImtu(ospfInterface.mtu()); |
| 309 | ddPacket.setSequenceNo(ddSeqNum); |
| 310 | |
| 311 | setLastSentDdPacket(ddPacket); |
| 312 | rxmtDdPacketTask = new InternalRxmtDdPacket(channel); |
| 313 | startRxMtDdTimer(channel); |
| 314 | //setting destination ip |
| 315 | ddPacket.setDestinationIp(packet.sourceIp()); |
| 316 | channel.write(ddPacket); |
| 317 | } else { |
| 318 | state = OspfNeighborState.TWOWAY; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * Checks whether to form adjacency or not. |
| 325 | * |
| 326 | * @return true indicates form adjacency, else false |
| 327 | */ |
| 328 | private boolean formAdjacencyOrNot() { |
| 329 | boolean formAdjacency = false; |
| 330 | |
| 331 | if (ospfInterface.interfaceType() == OspfInterfaceType.POINT_TO_POINT.value()) { |
| 332 | formAdjacency = true; |
| 333 | } else if (ospfInterface.interfaceType() == OspfInterfaceType.BROADCAST.value()) { |
| 334 | if (ospfInterface.ipAddress().equals(this.neighborDr) || |
| 335 | ospfInterface.ipAddress().equals(this.neighborBdr)) { |
| 336 | formAdjacency = true; |
| 337 | } else if (neighborBdr.equals(neighborIpAddr) || |
| 338 | neighborDr.equals(neighborIpAddr)) { |
| 339 | formAdjacency = true; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | log.debug("FormAdjacencyOrNot - neighborDR: {}, neighborBDR: {}, neighborIPAddr: {}, formAdjacencyOrNot {}", |
| 344 | neighborDr, neighborBdr, neighborIpAddr, formAdjacency); |
| 345 | |
| 346 | return formAdjacency; |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * At this point Master/Slave relationship is definitely established. |
| 351 | * DD sequence numbers have been exchanged. |
| 352 | * This is the begin of sending/receiving of DD OSPFMessages. |
| 353 | * |
| 354 | * @param ospfMessage OSPF message instance |
| 355 | * @param neighborIsMaster neighbor is master or slave |
| 356 | * @param payload contains the LSAs to add in Dd Packet |
| 357 | * @param ch netty channel instance |
| 358 | * @throws Exception might throws exception |
| 359 | */ |
| 360 | public void negotiationDone(OspfMessage ospfMessage, |
| 361 | boolean neighborIsMaster, List payload, Channel ch) throws Exception { |
| 362 | stopRxMtDdTimer(); |
| 363 | OspfPacketHeader packet = (OspfPacketHeader) ospfMessage; |
| 364 | DdPacket ddPacketForCheck = (DdPacket) packet; |
| 365 | if (ddPacketForCheck.isOpaqueCapable()) { |
| 366 | OspfLsdb database = ospfArea.database(); |
| 367 | List opaqueLsas = database.getAllLsaHeaders(true, true); |
| 368 | Iterator iterator = opaqueLsas.iterator(); |
| 369 | while (iterator.hasNext()) { |
| 370 | OspfLsa ospfLsa = (OspfLsa) iterator.next(); |
| 371 | if (ospfLsa.getOspfLsaType() == OspfLsaType.AREA_LOCAL_OPAQUE_LSA) { |
| 372 | OpaqueLsa10 opaqueLsa10 = (OpaqueLsa10) ospfLsa; |
| 373 | topLevelTlvs = opaqueLsa10.topLevelValues(); |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | if (state == OspfNeighborState.EXSTART) { |
| 378 | state = OspfNeighborState.EXCHANGE; |
| 379 | boolean excludeMaxAgeLsa = true; |
| 380 | //list of contents of area wise LSA |
| 381 | ddSummaryList = (CopyOnWriteArrayList) ospfArea.getLsaHeaders(excludeMaxAgeLsa, isOpaqueCapable); |
| 382 | |
| 383 | if (neighborIsMaster) { |
| 384 | processLsas(payload); |
| 385 | // ...construct new DD Packet... |
| 386 | DdPacket ddPacket = new DdPacket(); |
| 387 | // setting OSPF Header |
| 388 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 389 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 390 | ddPacket.setRouterId(ospfArea.routerId()); |
| 391 | ddPacket.setAreaId(ospfArea.areaId()); |
| 392 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 393 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 394 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 395 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 396 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 397 | if (isOpaqueEnabled && isOpaqueCapable) { |
| 398 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 399 | } else { |
| 400 | ddPacket.setOptions(ospfArea.options()); |
| 401 | } |
| 402 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_NOTSET); |
| 403 | ddPacket.setIsMore(OspfUtil.MORE_NOTSET); |
| 404 | ddPacket.setIsMaster(OspfUtil.NOT_MASTER); |
| 405 | ddPacket.setImtu(ospfInterface.mtu()); |
| 406 | ddPacket.setSequenceNo(ddSeqNum); |
| 407 | //setting the destination |
| 408 | ddPacket.setDestinationIp(packet.sourceIp()); |
| 409 | setLastSentDdPacket(ddPacket); |
| 410 | getIsMoreBit(); |
| 411 | |
| 412 | ch.write(lastSentDdPacket()); |
| 413 | } else { |
| 414 | // process LSA Vector's List, Add it to LSRequestList. |
| 415 | processLsas(payload); |
| 416 | DdPacket ddPacket = new DdPacket(); |
| 417 | // setting OSPF Header |
| 418 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 419 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 420 | ddPacket.setRouterId(ospfArea.routerId()); |
| 421 | ddPacket.setAreaId(ospfArea.areaId()); |
| 422 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 423 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 424 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 425 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 426 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 427 | if (isOpaqueEnabled && isOpaqueCapable) { |
| 428 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 429 | } else { |
| 430 | ddPacket.setOptions(ospfArea.options()); |
| 431 | } |
| 432 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_NOTSET); |
| 433 | ddPacket.setIsMore(OspfUtil.MORE_NOTSET); |
| 434 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 435 | ddPacket.setImtu(ospfInterface.mtu()); |
| 436 | ddPacket.setSequenceNo(ddSeqNum); |
| 437 | setLastSentDdPacket(ddPacket); |
| 438 | getIsMoreBit(); |
| 439 | ddPacket.setDestinationIp(packet.sourceIp()); |
| 440 | ch.write(lastSentDdPacket()); |
| 441 | startRxMtDdTimer(ch); |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * Process the LSA Headers received in the last received Database Description OSPFMessage. |
| 448 | * |
| 449 | * @param ddPayload LSA headers to process |
| 450 | * @throws Exception might throws exception |
| 451 | */ |
| 452 | public void processLsas(List ddPayload) throws Exception { |
| 453 | log.debug("OSPFNbr::processLsas...!!!"); |
| 454 | OspfLsa nextLsa; |
| 455 | Iterator lsas = ddPayload.iterator(); |
| 456 | while (lsas.hasNext()) { |
| 457 | nextLsa = (OspfLsa) lsas.next(); |
| 458 | // check LSA Type. |
| 459 | if (((nextLsa.getOspfLsaType().value() > OspfLsaType.EXTERNAL_LSA.value()) && |
| 460 | (nextLsa.getOspfLsaType().value() < OspfLsaType.LINK_LOCAL_OPAQUE_LSA.value())) || |
| 461 | (nextLsa.getOspfLsaType().value() > OspfLsaType.AS_OPAQUE_LSA.value())) { |
| 462 | // unknown lsType found! |
| 463 | seqNumMismatch("LS Type found was unknown."); |
| 464 | return; |
| 465 | } |
| 466 | |
| 467 | if ((nextLsa.getOspfLsaType() == OspfLsaType.EXTERNAL_LSA) && |
| 468 | !ospfArea.isExternalRoutingCapability()) { |
| 469 | // LSA is external and the Area has no external lsa capability |
| 470 | seqNumMismatch("External LSA found although area is stub."); |
| 471 | return; |
| 472 | } |
| 473 | |
| 474 | LsaWrapper lsaHasInstance = ospfArea.lsaLookup(nextLsa); |
| 475 | if (lsaHasInstance == null) { |
| 476 | lsReqList.put(((OspfAreaImpl) ospfArea).getLsaKey((LsaHeader) nextLsa), nextLsa); |
| 477 | } else { |
| 478 | String isNew = ((OspfAreaImpl) ospfArea).isNewerOrSameLsa(nextLsa, |
| 479 | lsaHasInstance.ospfLsa()); |
| 480 | if (isNew.equals("latest")) { |
| 481 | lsReqList.put(((OspfAreaImpl) ospfArea).getLsaKey((LsaHeader) nextLsa), nextLsa); |
| 482 | } |
| 483 | } |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * Handles sequence number mis match event. |
| 489 | * |
| 490 | * @param reason a string represents the mismatch reason |
| 491 | * @return OSPF message instance |
| 492 | * @throws Exception might throws exception |
| 493 | */ |
| 494 | public OspfMessage seqNumMismatch(String reason) throws Exception { |
| 495 | log.debug("OSPFNbr::seqNumMismatch...{} ", reason); |
| 496 | stopRxMtDdTimer(); |
| 497 | |
| 498 | if (state.getValue() >= OspfNeighborState.EXCHANGE.getValue()) { |
| 499 | /* if (state == OspfNeighborState.FULL) { |
| 500 | ospfArea.refreshArea(ospfInterface); |
| 501 | }*/ |
| 502 | |
| 503 | state = OspfNeighborState.EXSTART; |
| 504 | lsReqList.clear(); |
| 505 | ddSummaryList.clear(); |
| 506 | //increment the dd sequence number |
| 507 | ddSeqNum++; |
| 508 | |
| 509 | DdPacket ddPacket = new DdPacket(); |
| 510 | // seting OSPF Header |
| 511 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 512 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 513 | ddPacket.setRouterId(ospfArea.routerId()); |
| 514 | ddPacket.setAreaId(ospfArea.areaId()); |
| 515 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 516 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 517 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 518 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 519 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 520 | if (isOpaqueEnabled) { |
| 521 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 522 | } else { |
| 523 | ddPacket.setOptions(ospfArea.options()); |
| 524 | } |
| 525 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_SET); |
| 526 | ddPacket.setIsMore(OspfUtil.MORE_SET); |
| 527 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 528 | ddPacket.setImtu(ospfInterface.mtu()); |
| 529 | ddPacket.setSequenceNo(ddSeqNum); |
| 530 | |
| 531 | setLastSentDdPacket(ddPacket); |
| 532 | //setting destination ip |
| 533 | ddPacket.setDestinationIp(neighborIpAddr()); |
| 534 | setLastSentDdPacket(ddPacket); |
| 535 | |
| 536 | return ddPacket; |
| 537 | } |
| 538 | |
| 539 | return null; |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * Called if a LS Request has been received for an LSA which is not contained in the database. |
| 544 | * This indicates an error in the Database Exchange process. |
| 545 | * Actions to be performed are the same as in seqNumMismatch. |
| 546 | * In addition, stop the possibly activated re transmission timer. |
| 547 | * |
| 548 | * @param ch netty channel instance |
| 549 | */ |
| 550 | public void badLSReq(Channel ch) throws Exception { |
| 551 | log.debug("OSPFNbr::badLSReq...!!!"); |
| 552 | |
| 553 | if (state.getValue() >= OspfNeighborState.EXCHANGE.getValue()) { |
| 554 | if (state == OspfNeighborState.FULL) { |
| 555 | ospfArea.refreshArea(ospfInterface); |
| 556 | } |
| 557 | |
| 558 | stopRxMtDdTimer(); |
| 559 | state = OspfNeighborState.EXSTART; |
| 560 | |
| 561 | lsReqList.clear(); |
| 562 | ddSummaryList.clear(); |
| 563 | reTxList.clear(); |
| 564 | //increment the dd sequence number |
| 565 | isMaster = OspfUtil.IS_MASTER; |
| 566 | ddSeqNum++; |
| 567 | DdPacket ddPacket = new DdPacket(); |
| 568 | // seting OSPF Header |
| 569 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 570 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 571 | ddPacket.setRouterId(ospfArea.routerId()); |
| 572 | ddPacket.setAreaId(ospfArea.areaId()); |
| 573 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 574 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 575 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 576 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 577 | |
| 578 | // setting DD Body |
| 579 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 580 | if (isOpaqueEnabled && this.isOpaqueCapable) { |
| 581 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 582 | } else { |
| 583 | ddPacket.setOptions(ospfArea.options()); |
| 584 | } |
| 585 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_SET); |
| 586 | ddPacket.setIsMore(OspfUtil.MORE_SET); |
| 587 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 588 | ddPacket.setImtu(ospfInterface.mtu()); |
| 589 | ddPacket.setSequenceNo(ddSeqNum); |
| 590 | |
| 591 | rxmtDdPacketTask = new InternalRxmtDdPacket(ch); |
| 592 | startRxMtDdTimer(ch); |
| 593 | |
| 594 | //setting destination ip |
| 595 | ddPacket.setDestinationIp(neighborIpAddr()); |
| 596 | setLastSentDdPacket(ddPacket); |
| 597 | ch.write(ddPacket); |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * Called if state is EXCHANGE. This method is executed every time a DD Packets arrives. |
| 603 | * When the last Packet arrives, it transfers the state into LOADING or FULL |
| 604 | * |
| 605 | * @param neighborIsMaster true if neighbor is master else false |
| 606 | * @param dataDescPkt DdPacket instance |
| 607 | * @param ch netty channel instance |
| 608 | * @throws Exception might throws exception |
| 609 | */ |
| 610 | public void processDdPacket(boolean neighborIsMaster, DdPacket dataDescPkt, |
| 611 | Channel ch) throws Exception { |
| 612 | log.debug("OSPFNbr::neighborIsMaster.{}", neighborIsMaster); |
| 613 | |
| 614 | if (!neighborIsMaster) { |
| 615 | stopRxMtDdTimer(); |
| 616 | ddSeqNum++; |
| 617 | processLsas(dataDescPkt.getLsaHeaderList()); |
| 618 | if ((ddSummaryList.isEmpty()) && |
| 619 | (dataDescPkt.isMore() == OspfUtil.MORE_NOTSET)) { |
| 620 | log.debug( |
| 621 | "OSPFNbr::ddSummaryList is empty and dataDescPkt.isMore is zero..!!!"); |
| 622 | // generate the neighbor event ExchangeDone. |
| 623 | exchangeDone(dataDescPkt, ch); |
| 624 | } else { |
| 625 | log.debug("OSPFNbr::ddSummaryList is present...!!!"); |
| 626 | // send a new Database Description Packet to the slave. |
| 627 | DdPacket ddPacket = new DdPacket(); |
| 628 | // seting OSPF Header |
| 629 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 630 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 631 | ddPacket.setRouterId(ospfArea.routerId()); |
| 632 | ddPacket.setAreaId(ospfArea.areaId()); |
| 633 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 634 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 635 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 636 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 637 | // setting DD Body |
| 638 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 639 | if (isOpaqueEnabled && isOpaqueCapable) { |
| 640 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 641 | } else { |
| 642 | ddPacket.setOptions(ospfArea.options()); |
| 643 | } |
| 644 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_NOTSET); |
| 645 | ddPacket.setIsMore(OspfUtil.MORE_NOTSET); |
| 646 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 647 | ddPacket.setImtu(ospfInterface.mtu()); |
| 648 | ddPacket.setSequenceNo(ddSeqNum); |
| 649 | |
| 650 | setLastSentDdPacket(ddPacket); |
| 651 | getIsMoreBit(); |
| 652 | //Set the destination IP Address |
| 653 | ddPacket.setDestinationIp(dataDescPkt.sourceIp()); |
| 654 | ch.write(lastSentDdPacket()); |
| 655 | |
| 656 | startRxMtDdTimer(ch); |
| 657 | } |
| 658 | } else { |
| 659 | log.debug("OSPFNbr::neighborIsMaster is master...!!!"); |
| 660 | ddSeqNum = dataDescPkt.sequenceNo(); |
| 661 | processLsas(dataDescPkt.getLsaHeaderList()); |
| 662 | |
| 663 | DdPacket ddPacket = new DdPacket(); |
| 664 | // seting OSPF Header |
| 665 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 666 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 667 | ddPacket.setRouterId(ospfArea.routerId()); |
| 668 | ddPacket.setAreaId(ospfArea.areaId()); |
| 669 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 670 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 671 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 672 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 673 | // setting DD Body |
| 674 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 675 | if (isOpaqueEnabled && this.isOpaqueCapable) { |
| 676 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 677 | } else { |
| 678 | ddPacket.setOptions(ospfArea.options()); |
| 679 | } |
| 680 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_NOTSET); |
| 681 | ddPacket.setIsMore(OspfUtil.MORE_NOTSET); |
| 682 | ddPacket.setIsMaster(OspfUtil.NOT_MASTER); |
| 683 | ddPacket.setImtu(ospfInterface.mtu()); |
| 684 | ddPacket.setSequenceNo(ddSeqNum); |
| 685 | setLastSentDdPacket(ddPacket); |
| 686 | getIsMoreBit(); |
| 687 | |
| 688 | if ((ddPacket.isMore() == OspfUtil.MORE_NOTSET) && |
| 689 | (dataDescPkt.isMore() == OspfUtil.MORE_NOTSET)) { |
| 690 | // generate the neighbor event ExchangeDone. |
| 691 | exchangeDone(dataDescPkt, ch); |
| 692 | } |
| 693 | |
| 694 | ddPacket.setDestinationIp(dataDescPkt.sourceIp()); |
| 695 | ch.write(ddPacket); |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * Sets the more bit in stored, last sent DdPacket. |
| 701 | */ |
| 702 | private void getIsMoreBit() { |
| 703 | DdPacket ddPacket = lastSentDdPacket(); |
| 704 | int count = ddSummaryList.size(); |
| 705 | |
| 706 | if (!ddSummaryList.isEmpty()) { |
| 707 | Iterator itr = ddSummaryList.iterator(); |
| 708 | int currentLength = OspfUtil.DD_HEADER_LENGTH; |
| 709 | int maxSize = ospfInterface.mtu() - OspfUtil.LSA_HEADER_LENGTH; // subtract a normal IP header. |
| 710 | while (itr.hasNext()) { |
| 711 | if ((currentLength + OspfUtil.LSA_HEADER_LENGTH) > maxSize) { |
| 712 | break; |
| 713 | } |
| 714 | |
| 715 | LsaHeader lsaHeader = (LsaHeader) itr.next(); |
| 716 | ddPacket.addLsaHeader(lsaHeader); |
| 717 | currentLength = currentLength + OspfUtil.LSA_HEADER_LENGTH; |
| 718 | ddSummaryList.remove(lsaHeader); |
| 719 | count--; |
| 720 | } |
| 721 | |
| 722 | if (count > 0) { |
| 723 | ddPacket.setIsMore(OspfUtil.MORE_SET); |
| 724 | } else { |
| 725 | ddPacket.setIsMore(OspfUtil.MORE_NOTSET); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | setLastSentDdPacket(ddPacket); |
| 730 | } |
| 731 | |
| 732 | /** |
| 733 | * At this point, the router has sent and received an entire sequence of DD packets. |
| 734 | * Now it must be determined whether the new state is FULL, or LS Request packets |
| 735 | * have to be send. |
| 736 | * |
| 737 | * @param message OSPF message instance |
| 738 | * @param ch netty channel handler |
| 739 | */ |
| 740 | public void exchangeDone(OspfMessage message, Channel ch) { |
| 741 | log.debug("OSPFNbr::exchangeDone...!!!"); |
| 742 | stopRxMtDdTimer(); |
| 743 | |
| 744 | OspfPacketHeader header = (OspfPacketHeader) message; |
| 745 | |
| 746 | if (state == OspfNeighborState.EXCHANGE) { |
| 747 | if (lsReqList.isEmpty()) { |
| 748 | state = OspfNeighborState.FULL; |
| 749 | //handler.addDeviceInformation(this); |
| 750 | //handler.addLinkInformation(this, topLevelTlvs); |
| 751 | } else { |
| 752 | state = OspfNeighborState.LOADING; |
| 753 | LsRequest lsRequest = buildLsRequest(); |
| 754 | //Setting the destination address |
| 755 | lsRequest.setDestinationIp(header.sourceIp()); |
| 756 | ch.write(lsRequest); |
| 757 | |
| 758 | setLastSentLsrPacket(lsRequest); |
| 759 | startRxMtLsrTimer(ch); |
| 760 | } |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | /** |
| 765 | * Builds LS Request. |
| 766 | * |
| 767 | * @return ls request instance |
| 768 | */ |
| 769 | private LsRequest buildLsRequest() { |
| 770 | //send link state request packet to neighbor |
| 771 | //for recent lsa's which are not received in exchange state |
| 772 | LsRequest lsRequest = new LsRequest(); |
| 773 | lsRequest.setOspfVer(OspfUtil.OSPF_VERSION); |
| 774 | lsRequest.setOspftype(OspfPacketType.LSREQUEST.value()); |
| 775 | lsRequest.setRouterId(ospfArea.routerId()); |
| 776 | lsRequest.setAreaId(ospfArea.areaId()); |
| 777 | lsRequest.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 778 | lsRequest.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 779 | lsRequest.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 780 | lsRequest.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 781 | |
| 782 | Set lsaKeys = lsReqList.keySet(); |
| 783 | Iterator itr = lsaKeys.iterator(); |
| 784 | |
| 785 | int currentLength = OspfUtil.OSPF_HEADER_LENGTH; |
| 786 | int maxSize = ospfInterface.mtu() - |
| 787 | OspfUtil.LSA_HEADER_LENGTH; // subtract a normal IP header. |
| 788 | |
| 789 | while (itr.hasNext()) { |
| 790 | if ((currentLength + OspfUtil.LSREQUEST_LENGTH) >= maxSize) { |
| 791 | break; |
| 792 | } |
| 793 | LsRequestPacket lsRequestPacket = new LsRequestPacket(); |
| 794 | |
| 795 | String key = ((String) itr.next()); |
| 796 | String[] lsaKey = key.split("-"); |
| 797 | OspfLsa lsa = (OspfLsa) lsReqList.get(key); |
| 798 | |
| 799 | lsRequestPacket.setLsType(Integer.valueOf(lsaKey[0])); |
| 800 | lsRequestPacket.setOwnRouterId(lsaKey[2]); |
| 801 | |
| 802 | if (((lsa.getOspfLsaType().value() == OspfLsaType.AREA_LOCAL_OPAQUE_LSA.value()) || |
| 803 | (lsa.getOspfLsaType().value() == OspfLsaType.LINK_LOCAL_OPAQUE_LSA.value())) || |
| 804 | (lsa.getOspfLsaType().value() == OspfLsaType.AS_OPAQUE_LSA.value())) { |
| 805 | OpaqueLsaHeader header = (OpaqueLsaHeader) lsa; |
| 806 | byte[] opaqueIdBytes = OspfUtil.convertToTwoBytes(header.opaqueId()); |
| 807 | lsRequestPacket.setLinkStateId(header.opaqueType() + "." + "0" + "." + opaqueIdBytes[0] |
| 808 | + "." + opaqueIdBytes[1]); |
| 809 | } else { |
| 810 | lsRequestPacket.setLinkStateId(lsaKey[1]); |
| 811 | } |
| 812 | |
| 813 | lsRequest.addLinkStateRequests(lsRequestPacket); |
| 814 | currentLength = currentLength + OspfUtil.LSREQUEST_LENGTH; |
| 815 | } |
| 816 | |
| 817 | return lsRequest; |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * Determines whether an adjacency should be established/maintained with the neighbor or not. |
| 822 | * |
| 823 | * @param ch netty channel instance |
| 824 | */ |
| 825 | public void adjOk(Channel ch) { |
| 826 | log.debug("OSPFNbr::adjOk...!!!"); |
| 827 | if (ospfInterface.interfaceType() != OspfInterfaceType.POINT_TO_POINT.value()) { |
| 828 | if (state == OspfNeighborState.TWOWAY) { |
| 829 | if (formAdjacencyOrNot()) { |
| 830 | state = OspfNeighborState.EXSTART; |
| 831 | //check for sequence number in lsdb |
| 832 | ddSeqNum++; |
| 833 | |
| 834 | DdPacket ddPacket = new DdPacket(); |
| 835 | // seting OSPF Header |
| 836 | ddPacket.setOspfVer(OspfUtil.OSPF_VERSION); |
| 837 | ddPacket.setOspftype(OspfPacketType.DD.value()); |
| 838 | ddPacket.setRouterId(ospfArea.routerId()); |
| 839 | ddPacket.setAreaId(ospfArea.areaId()); |
| 840 | ddPacket.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 841 | ddPacket.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 842 | ddPacket.setOspfPacLength(OspfUtil.NOT_ASSIGNED); |
| 843 | ddPacket.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 844 | |
| 845 | // setting DD Body |
| 846 | boolean isOpaqueEnabled = ospfArea.isOpaqueEnabled(); |
| 847 | if (isOpaqueEnabled && this.isOpaqueCapable) { |
| 848 | ddPacket.setOptions(ospfArea.opaqueEnabledOptions()); |
| 849 | } else { |
| 850 | ddPacket.setOptions(ospfArea.options()); |
| 851 | } |
| 852 | ddPacket.setIsInitialize(OspfUtil.INITIALIZE_SET); |
| 853 | ddPacket.setIsMore(OspfUtil.MORE_SET); |
| 854 | ddPacket.setIsMaster(OspfUtil.IS_MASTER); |
| 855 | ddPacket.setImtu(ospfInterface.mtu()); |
| 856 | ddPacket.setSequenceNo(ddSeqNum); |
| 857 | rxmtDdPacketTask = new InternalRxmtDdPacket(ch); |
| 858 | startRxMtDdTimer(ch); |
| 859 | //setting destination ip |
| 860 | ddPacket.setDestinationIp(neighborIpAddr()); |
| 861 | setLastSentDdPacket(ddPacket); |
| 862 | ch.write(ddPacket); |
| 863 | } |
| 864 | } else if (state.getValue() >= OspfNeighborState.EXSTART.getValue()) { |
| 865 | if (!formAdjacencyOrNot()) { |
| 866 | state = OspfNeighborState.TWOWAY; |
| 867 | lsReqList.clear(); |
| 868 | ddSummaryList.clear(); |
| 869 | reTxList.clear(); |
| 870 | } |
| 871 | } |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | /** |
| 876 | * LS Update Packet has been received while state was EXCHANGE or LOADING. |
| 877 | * Examine the received LSAs, check whether they were requested or not and process |
| 878 | * them accordingly. Therefore use method "processReceivedLsa" for further treatment. |
| 879 | * |
| 880 | * @param lsUpdPkt LS Update Packet received while Neighbor state was EXCHANGE or |
| 881 | * LOADING |
| 882 | * @param ch netty channel instance |
| 883 | * @throws Exception might throws exception |
| 884 | */ |
| 885 | public void processLsUpdate(LsUpdate lsUpdPkt, Channel ch) throws Exception { |
| 886 | stopRxMtLsrTimer(); |
| 887 | log.debug("OSPFNbr::processLsUpdate...!!!"); |
| 888 | |
| 889 | List lsaList = lsUpdPkt.getLsaList(); |
| 890 | if (!lsaList.isEmpty()) { |
| 891 | Iterator itr = lsaList.iterator(); |
| 892 | |
| 893 | while (itr.hasNext()) { |
| 894 | LsaHeader lsaHeader = (LsaHeader) itr.next(); |
| 895 | String key = ((OspfAreaImpl) ospfArea).getLsaKey(lsaHeader); |
| 896 | |
| 897 | if (lsReqList.containsKey(key)) { |
| 898 | boolean removeIt; |
| 899 | removeIt = processReceivedLsa(lsaHeader, false, ch, |
| 900 | lsUpdPkt.sourceIp()); |
| 901 | if (removeIt) { |
| 902 | lsReqList.remove(key); |
| 903 | } |
| 904 | } else { |
| 905 | // LSA was received via Flooding |
| 906 | processReceivedLsa(lsaHeader, true, ch, |
| 907 | lsUpdPkt.sourceIp()); |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | if (lsReqList.isEmpty() && (state == OspfNeighborState.LOADING)) { |
| 912 | // loading complete |
| 913 | loadingDone(); |
| 914 | } else { |
| 915 | stopRxMtLsrTimer(); |
| 916 | LsRequest lsRequest = buildLsRequest(); |
| 917 | lsRequest.setDestinationIp(lsUpdPkt.sourceIp()); |
| 918 | setLastSentLsrPacket(lsRequest); |
| 919 | |
| 920 | startRxMtLsrTimer(ch); |
| 921 | } |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | /*** |
| 926 | * Method gets called when no more ls request list and moving to FULL State. |
| 927 | * |
| 928 | * @throws Exception might throws exception |
| 929 | */ |
| 930 | public void loadingDone() throws Exception { |
| 931 | stopRxMtLsrTimer(); |
| 932 | stopRxMtDdTimer(); |
| 933 | log.debug("OSPFNbr::loadingDone...!!!"); |
| 934 | state = OspfNeighborState.FULL; |
| 935 | ospfArea.refreshArea(ospfInterface); |
| 936 | } |
| 937 | |
| 938 | /** |
| 939 | * Adds device and link. |
| 940 | * |
| 941 | * @param topologyForDeviceAndLink topology for device and link instance |
| 942 | */ |
| 943 | private void callDeviceAndLinkAdding(TopologyForDeviceAndLink topologyForDeviceAndLink) { |
| 944 | Map<String, DeviceInformation> deviceInformationMap = topologyForDeviceAndLink.deviceInformationMap(); |
| 945 | Map<String, LinkInformation> linkInformationMap = topologyForDeviceAndLink.linkInformationMap(); |
| 946 | OspfRouter ospfRouter = new OspfRouterImpl(); |
| 947 | log.debug("Device Information in list format along with size {}", deviceInformationMap.size()); |
| 948 | for (String key : deviceInformationMap.keySet()) { |
| 949 | DeviceInformation value = deviceInformationMap.get(key); |
| 950 | ospfRouter.setRouterIp(value.routerId()); |
| 951 | ospfRouter.setAreaIdOfInterface(ospfArea.areaId()); |
| 952 | ospfRouter.setNeighborRouterId(value.deviceId()); |
| 953 | OspfDeviceTed ospfDeviceTed = new OspfDeviceTedImpl(); |
| 954 | List<Ip4Address> ip4Addresses = value.interfaceId(); |
| 955 | ospfDeviceTed.setIpv4RouterIds(ip4Addresses); |
| 956 | ospfRouter.setDeviceTed(ospfDeviceTed); |
| 957 | ospfRouter.setOpaque(ospfArea.isOpaqueEnabled()); |
| 958 | if (value.isDr()) { |
| 959 | ospfRouter.setDr(value.isDr()); |
| 960 | } else { |
| 961 | ospfRouter.setDr(false); |
| 962 | } |
| 963 | int size = value.interfaceId().size(); |
| 964 | for (int i = 0; i < size; i++) { |
| 965 | ospfRouter.setInterfaceId(value.interfaceId().get(i)); |
| 966 | } |
| 967 | if (value.isAlreadyCreated()) { |
| 968 | removeDeviceDetails(value.routerId()); |
| 969 | OspfRouter ospfRouter1 = new OspfRouterImpl(); |
| 970 | ospfRouter1.setRouterIp(value.routerId()); |
| 971 | ospfRouter1.setInterfaceId(ospfInterface.ipAddress()); |
| 972 | ospfRouter1.setAreaIdOfInterface(ospfArea.areaId()); |
| 973 | ospfRouter1.setDeviceTed(new OspfDeviceTedImpl()); |
| 974 | topologyForDeviceAndLink.removeLinks(value.routerId()); |
| 975 | handler.removeDeviceInformation(ospfRouter1); |
| 976 | } |
| 977 | handler.addDeviceInformation(ospfRouter); |
| 978 | } |
| 979 | for (Map.Entry<String, LinkInformation> entry : linkInformationMap.entrySet()) { |
| 980 | String key = entry.getKey(); |
| 981 | LinkInformation value = entry.getValue(); |
| 982 | OspfRouter ospfRouterForLink = new OspfRouterImpl(); |
| 983 | ospfRouterForLink.setInterfaceId(value.interfaceIp()); |
| 984 | ospfRouterForLink.setAreaIdOfInterface(ospfArea.areaId()); |
| 985 | ospfRouterForLink.setOpaque(ospfArea.isOpaqueEnabled()); |
| 986 | OspfLinkTed ospfLinkTed = |
| 987 | topologyForDeviceAndLink.getOspfLinkTedHashMap(value.linkDestinationId().toString()); |
| 988 | if (ospfLinkTed == null) { |
| 989 | ospfLinkTed = new OspfLinkTedImpl(); |
| 990 | ospfLinkTed.setMaximumLink(Bandwidth.bps(0)); |
| 991 | ospfLinkTed.setMaxReserved(Bandwidth.bps(0)); |
| 992 | ospfLinkTed.setTeMetric(0); |
| 993 | } |
| 994 | |
| 995 | if (!value.isLinkSrcIdNotRouterId()) { |
| 996 | ospfRouterForLink.setRouterIp(value.linkSourceId()); |
| 997 | ospfRouterForLink.setNeighborRouterId(value.linkDestinationId()); |
| 998 | try { |
| 999 | handler.addLinkInformation(ospfRouterForLink, ospfLinkTed); |
| 1000 | log.debug("LinkId, LinkSrc , LinkDest , LinkInterface values are : " |
| 1001 | + value.linkId() + " , " + value.linkSourceId() + " , " |
| 1002 | + value.linkDestinationId() + " , " |
| 1003 | + value.interfaceIp()); |
| 1004 | } catch (Exception e) { |
| 1005 | log.debug("Got Exception : {}", e.getMessage()); |
| 1006 | } |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | // RFC 2328 Section 13 - partly as flooding procedure |
| 1012 | |
| 1013 | /** |
| 1014 | * Processes the received Lsa. |
| 1015 | * |
| 1016 | * @param recLsa received Lsa |
| 1017 | * @param receivedViaFlooding received via flooding or not |
| 1018 | * @param ch channel instance |
| 1019 | * @param sourceIp source of this Lsa |
| 1020 | * @return true to remove it from lsReqList else false |
| 1021 | * @throws Exception might throws exception |
| 1022 | */ |
| 1023 | public boolean processReceivedLsa(LsaHeader recLsa, |
| 1024 | boolean receivedViaFlooding, Channel ch, Ip4Address sourceIp) |
| 1025 | throws Exception { |
| 1026 | log.debug("OSPFNbr::processReceivedLsa(recLsa, recievedViaFlooding, ch)...!!!"); |
| 1027 | |
| 1028 | //Validate the lsa checksum RFC 2328 13 (1) |
| 1029 | ChecksumCalculator checkSum = new ChecksumCalculator(); |
| 1030 | if (!checkSum.isValidLsaCheckSum(recLsa, |
| 1031 | recLsa.getOspfLsaType().value(), |
| 1032 | OspfUtil.LSAPACKET_CHECKSUM_POS1, |
| 1033 | OspfUtil.LSAPACKET_CHECKSUM_POS2)) { |
| 1034 | log.debug("Checksum mismatch. Received LSA packet type {} ", |
| 1035 | recLsa.lsType()); |
| 1036 | |
| 1037 | return true; |
| 1038 | } |
| 1039 | |
| 1040 | //If LSA type is unknown discard the lsa RFC 2328 13(2) |
| 1041 | if (((recLsa.getOspfLsaType().value() > OspfLsaType.EXTERNAL_LSA.value()) && |
| 1042 | (recLsa.getOspfLsaType().value() < OspfLsaType.LINK_LOCAL_OPAQUE_LSA.value())) || |
| 1043 | (recLsa.getOspfLsaType().value() > OspfLsaType.AS_OPAQUE_LSA.value())) { |
| 1044 | return true; |
| 1045 | } |
| 1046 | |
| 1047 | //If LSA type is external & the area is configured as stub area discard the lsa RFC 2328 13(3) |
| 1048 | if ((recLsa.getOspfLsaType() == OspfLsaType.EXTERNAL_LSA) && |
sunish vk | aa48da8 | 2016-03-02 23:17:06 +0530 | [diff] [blame] | 1049 | (!ospfArea.isExternalRoutingCapability())) { |
Kiran Ramachandra | 3d94a6c | 2016-02-17 16:57:03 +0530 | [diff] [blame] | 1050 | return true; |
| 1051 | } |
| 1052 | |
| 1053 | //if lsa age is equal to maxage && instance is not in lsdb && none of neighbors are in exchange |
| 1054 | // or loading state |
| 1055 | // Acknowledge the receipt by sending LSAck to the sender. 2328 13(4) |
| 1056 | if ((recLsa.age() == OspfParameters.MAXAGE) && |
| 1057 | (ospfArea.lsaLookup(recLsa) == null) && |
| 1058 | ospfArea.noNeighborInLsaExchangeProcess()) { |
| 1059 | // RFC 2328 Section 13. (4) |
| 1060 | // Because the LSA was not yet requested, it is treated as a flooded LSA and thus |
| 1061 | // acknowledged. |
| 1062 | directAcknowledge(recLsa, ch, sourceIp); |
| 1063 | return true; |
| 1064 | } |
| 1065 | |
| 1066 | String key = ((OspfAreaImpl) ospfArea).getLsaKey(recLsa); |
| 1067 | LsaWrapper lsWrapper = ospfArea.lsaLookup(recLsa); |
| 1068 | String status = isNullorLatest(lsWrapper, recLsa); |
| 1069 | //Section 13 (5) |
| 1070 | if (status.equals("isNullorLatest")) { |
| 1071 | |
| 1072 | if (recLsa.lsType() == OspfLsaType.ROUTER.value() && recLsa.advertisingRouter().equals( |
| 1073 | ospfArea.routerId())) { |
| 1074 | if (recLsa.lsSequenceNo() > ((LsaWrapperImpl) lsWrapper).lsaHeader().lsSequenceNo()) { |
| 1075 | ospfArea.setDbRouterSequenceNumber(recLsa.lsSequenceNo() + 1); |
| 1076 | processSelfOriginatedLsa(); |
| 1077 | } |
| 1078 | |
| 1079 | if (recLsa.age() == OspfParameters.MAXAGE) { |
| 1080 | ((LsaWrapperImpl) lsWrapper).lsaHeader().setAge(OspfParameters.MAXAGE); |
| 1081 | //remove from db & bin, add the lsa to MaxAge bin. |
| 1082 | ospfArea.addLsaToMaxAgeBin(((OspfAreaImpl) ospfArea).getLsaKey(((LsaWrapperImpl) |
| 1083 | lsWrapper).lsaHeader()), lsWrapper); |
| 1084 | ospfArea.removeLsaFromBin(lsWrapper); |
| 1085 | } |
| 1086 | |
| 1087 | return true; |
| 1088 | } else if (recLsa.lsType() == OspfLsaType.NETWORK.value() && isLinkStateMatchesOwnRouterId( |
| 1089 | recLsa.linkStateId())) { |
| 1090 | // if we are not DR or if origination router ID not equal to our router ID //either |
| 1091 | // DR state changed or our router ID was changed |
| 1092 | //set LSAge = MaxAge |
| 1093 | //flood the LSA |
| 1094 | if (((OspfInterfaceImpl) ospfInterface).state() != OspfInterfaceState.DR || |
| 1095 | !recLsa.advertisingRouter().equals( |
| 1096 | ospfArea.routerId())) { |
| 1097 | if (lsWrapper != null) { |
| 1098 | ((LsaWrapperImpl) lsWrapper).lsaHeader().setAge(OspfParameters.MAXAGE); |
| 1099 | //remove from bin, add the lsa to MaxAge bin. |
| 1100 | ospfArea.addLsaToMaxAgeBin(((OspfAreaImpl) ospfArea).getLsaKey(((LsaWrapperImpl) |
| 1101 | lsWrapper).lsaHeader()), lsWrapper); |
| 1102 | ospfArea.removeLsaFromBin(lsWrapper); |
| 1103 | } else { |
| 1104 | recLsa.setAge(OspfParameters.MAXAGE); |
| 1105 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(recLsa); |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | return true; |
| 1110 | } else { |
| 1111 | if (recLsa.age() == OspfParameters.MAXAGE) { |
| 1112 | ((OspfInterfaceImpl) ospfInterface).addLsaHeaderForDelayAck(recLsa); |
| 1113 | //remove from db & bin, add the lsa to MaxAge bin. |
| 1114 | if (lsWrapper != null) { |
| 1115 | lsWrapper.setLsaAgeReceived(OspfParameters.MAXAGE); |
| 1116 | ospfArea.addLsaToMaxAgeBin(((OspfAreaImpl) ospfArea).getLsaKey(((LsaWrapperImpl) |
| 1117 | lsWrapper).lsaHeader()), lsWrapper); |
| 1118 | ospfArea.removeLsaFromBin(lsWrapper); |
| 1119 | } else { |
| 1120 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(recLsa); |
| 1121 | } |
| 1122 | |
| 1123 | return true; |
| 1124 | } else { |
| 1125 | ospfArea.addLsa(recLsa, ospfInterface); |
| 1126 | log.debug("Inside addLsaMethod"); |
| 1127 | topologyForDeviceAndLink.addLocalDevice(recLsa, ospfInterface, ospfArea); |
| 1128 | callDeviceAndLinkAdding(topologyForDeviceAndLink); |
| 1129 | log.debug("Adding to lsdb interface State {}", ((OspfInterfaceImpl) ospfInterface).state().value()); |
| 1130 | // should not send any acknowledge if flooded out on receiving interface |
| 1131 | if (((OspfInterfaceImpl) ospfInterface).state().value() == OspfInterfaceState.BDR.value()) { |
| 1132 | if (neighborDr.equals(sourceIp)) { |
| 1133 | log.debug("Adding for delayed ack {}", recLsa); |
| 1134 | ((OspfInterfaceImpl) ospfInterface).addLsaHeaderForDelayAck(recLsa); |
| 1135 | } |
| 1136 | } else { |
| 1137 | log.debug("Adding for delayed ack {}", recLsa); |
| 1138 | ((OspfInterfaceImpl) ospfInterface).addLsaHeaderForDelayAck(recLsa); |
| 1139 | } |
| 1140 | |
| 1141 | if (((OspfInterfaceImpl) ospfInterface).state().value() == OspfInterfaceState.DR.value() || |
| 1142 | ((OspfInterfaceImpl) ospfInterface).state().value() == |
| 1143 | OspfInterfaceState.POINT2POINT.value()) { |
| 1144 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(recLsa); |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | } |
| 1149 | } |
| 1150 | // RFC 2328 Section 13 (6) |
| 1151 | if (lsReqList.contains(key)) { |
| 1152 | badLSReq(ch); |
| 1153 | } |
| 1154 | if (status.equals("same")) { //13 (7) |
| 1155 | if (pendingReTxList.containsKey(key)) { |
| 1156 | pendingReTxList.remove(key); |
| 1157 | if (((OspfInterfaceImpl) ospfInterface).state().value() == OspfInterfaceState.BDR.value()) { |
| 1158 | if (neighborDr.equals(recLsa.advertisingRouter())) { |
| 1159 | ((OspfInterfaceImpl) ospfInterface).addLsaHeaderForDelayAck(recLsa); |
| 1160 | } |
| 1161 | } |
| 1162 | } else { |
| 1163 | directAcknowledge(recLsa, ch, sourceIp); |
| 1164 | return true; |
| 1165 | } |
| 1166 | } else if (status.equals("old")) { // section 13 - point 8 |
| 1167 | if ((recLsa.lsSequenceNo() == OspfParameters.MAXSEQUENCENUMBER) && |
| 1168 | (recLsa.age() == OspfParameters.MAXAGE)) { |
| 1169 | // section 13 - point 8 |
| 1170 | // simple discard the received LSA - |
| 1171 | return true; |
| 1172 | } else { |
| 1173 | // respond back with the same LSA |
| 1174 | //Using flood LSA to sent the LSUpdate back to advertising router |
| 1175 | int diff = Math.abs(lsWrapper.lsaAgeReceived() - recLsa.age()); |
| 1176 | if (diff > OspfParameters.MINLSARRIVAL) { |
| 1177 | sendLsa(((LsaWrapperImpl) lsWrapper).lsaHeader(), sourceIp, ch); |
| 1178 | } |
| 1179 | } |
| 1180 | } |
| 1181 | callDeviceAndLinkAdding(topologyForDeviceAndLink); |
| 1182 | return true; |
| 1183 | } |
| 1184 | |
| 1185 | /** |
| 1186 | * Checks Link State ID is equal to one of the router's own IP interface addresses. |
| 1187 | * |
| 1188 | * @param linkStateId link state id |
| 1189 | * @return true if link state matches or false |
| 1190 | */ |
| 1191 | private boolean isLinkStateMatchesOwnRouterId(String linkStateId) { |
| 1192 | boolean isLinkStateMatches = false; |
| 1193 | List<OspfInterface> interfaceLst = ospfArea.getInterfacesLst(); |
| 1194 | for (OspfInterface ospfInterface : interfaceLst) { |
| 1195 | if (ospfInterface.ipAddress().toString().equals(linkStateId)) { |
| 1196 | isLinkStateMatches = true; |
| 1197 | break; |
| 1198 | } |
| 1199 | } |
| 1200 | |
| 1201 | return isLinkStateMatches; |
| 1202 | } |
| 1203 | |
| 1204 | /** |
| 1205 | * RFC 2328 Section 13 (5). |
| 1206 | * |
| 1207 | * @param lsWrapper ls wrapper instance |
| 1208 | * @param recLsa received LSA instance |
| 1209 | * @return returns a string status |
| 1210 | */ |
| 1211 | public String isNullorLatest(LsaWrapper lsWrapper, LsaHeader recLsa) { |
| 1212 | |
| 1213 | |
| 1214 | if (lsWrapper != null) { |
| 1215 | LsaHeader ownLsa = (LsaHeader) lsWrapper.ospfLsa(); |
| 1216 | String status = ospfArea.isNewerOrSameLsa(recLsa, ownLsa); |
| 1217 | |
| 1218 | if (status.equals("latest")) { |
| 1219 | return "isNullorLatest"; |
| 1220 | } else { |
| 1221 | return status; |
| 1222 | } |
| 1223 | } else { |
| 1224 | return "isNullorLatest"; |
| 1225 | } |
| 1226 | } |
| 1227 | |
| 1228 | /** |
| 1229 | * RFC 2328 section 13.4 |
| 1230 | * Processing self-originated LSAs. |
| 1231 | * |
| 1232 | * @throws Exception might throws exception |
| 1233 | */ |
| 1234 | public void processSelfOriginatedLsa() throws Exception { |
| 1235 | ospfArea.refreshArea(ospfInterface); |
| 1236 | } |
| 1237 | |
| 1238 | /** |
| 1239 | * Sends the LSA to destination address. |
| 1240 | * |
| 1241 | * @param lsa LSA instance to sent |
| 1242 | * @param destination destination IP address |
| 1243 | * @param ch netty channel instance |
| 1244 | */ |
| 1245 | public void sendLsa(LsaHeader lsa, Ip4Address destination, Channel ch) { |
| 1246 | if (lsa == null) { |
| 1247 | return; |
| 1248 | } |
| 1249 | |
| 1250 | LsUpdate responseLsUpdate = new LsUpdate(); |
| 1251 | // seting OSPF Header |
| 1252 | responseLsUpdate.setOspfVer(OspfUtil.OSPF_VERSION); |
| 1253 | responseLsUpdate.setOspftype(OspfPacketType.LSUPDATE.value()); |
| 1254 | responseLsUpdate.setRouterId(ospfArea.routerId()); |
| 1255 | responseLsUpdate.setAreaId(ospfArea.areaId()); |
| 1256 | responseLsUpdate.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 1257 | responseLsUpdate.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 1258 | responseLsUpdate.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 1259 | responseLsUpdate.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 1260 | responseLsUpdate.setNumberOfLsa(1); |
| 1261 | responseLsUpdate.addLsa(lsa); |
| 1262 | |
| 1263 | //setting the destination. |
| 1264 | responseLsUpdate.setDestinationIp(destination); |
| 1265 | ch.write(responseLsUpdate); |
| 1266 | } |
| 1267 | |
| 1268 | /** |
| 1269 | * Sends a direct Acknowledgment for a particular LSA to the Neighbor. |
| 1270 | * |
| 1271 | * @param ackLsa LSA instance |
| 1272 | * @param ch netty channel instance |
| 1273 | * @param sourceIp source IP address |
| 1274 | */ |
| 1275 | public void directAcknowledge(LsaHeader ackLsa, Channel ch, Ip4Address sourceIp) { |
| 1276 | log.debug("OSPFNbr::directAcknowledge...!!!"); |
| 1277 | |
| 1278 | LsAcknowledge ackContent = new LsAcknowledge(); |
| 1279 | // seting OSPF Header |
| 1280 | ackContent.setOspfVer(OspfUtil.OSPF_VERSION); |
| 1281 | ackContent.setOspftype(OspfPacketType.LSAACK.value()); |
| 1282 | ackContent.setRouterId(ospfArea.routerId()); |
| 1283 | ackContent.setAreaId(ospfArea.areaId()); |
| 1284 | ackContent.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 1285 | ackContent.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 1286 | ackContent.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 1287 | ackContent.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 1288 | ackContent.addLinkStateHeader(ackLsa); |
| 1289 | //setting the destination IP |
| 1290 | ackContent.setDestinationIp(sourceIp); |
| 1291 | ch.write(ackContent); |
| 1292 | } |
| 1293 | |
| 1294 | /** |
| 1295 | * Called when neighbor is down. |
| 1296 | * |
| 1297 | * @throws Exception might throws exception |
| 1298 | */ |
| 1299 | public void neighborDown() throws Exception { |
| 1300 | log.debug("Neighbor Down {} and NeighborId {}", neighborIpAddr, |
| 1301 | neighborId); |
| 1302 | stopInactivityTimeCheck(); |
| 1303 | stopRxMtDdTimer(); |
| 1304 | stopRxMtLsrTimer(); |
| 1305 | |
| 1306 | if (floodingTimerScheduled) { |
| 1307 | stopFloodingTimer(); |
| 1308 | floodingTimerScheduled = false; |
| 1309 | } |
| 1310 | |
| 1311 | state = OspfNeighborState.DOWN; |
| 1312 | ospfArea.refreshArea(ospfInterface); |
| 1313 | lsReqList.clear(); |
| 1314 | ddSummaryList.clear(); |
| 1315 | if (neighborIpAddr.equals(neighborBdr) || |
| 1316 | neighborIpAddr.equals(neighborDr)) { |
| 1317 | handler.neighborChange(); |
| 1318 | } |
| 1319 | log.debug("Neighbor Went Down : " |
| 1320 | + this.neighborIpAddr + " , " + this.neighborId); |
| 1321 | removeDeviceDetails(this.neighborId); |
| 1322 | OspfRouter ospfRouter = new OspfRouterImpl(); |
| 1323 | ospfRouter.setRouterIp(this.neighborId()); |
| 1324 | ospfRouter.setInterfaceId(ospfInterface.ipAddress()); |
| 1325 | ospfRouter.setAreaIdOfInterface(ospfArea.areaId()); |
| 1326 | ospfRouter.setDeviceTed(new OspfDeviceTedImpl()); |
| 1327 | handler.removeDeviceInformation(ospfRouter); |
| 1328 | removeDeviceDetails(this.neighborIpAddr); |
| 1329 | OspfRouter ospfRouter1 = new OspfRouterImpl(); |
| 1330 | ospfRouter1.setRouterIp(this.neighborIpAddr); |
| 1331 | ospfRouter1.setInterfaceId(ospfInterface.ipAddress()); |
| 1332 | ospfRouter1.setAreaIdOfInterface(ospfArea.areaId()); |
| 1333 | ospfRouter1.setDeviceTed(new OspfDeviceTedImpl()); |
| 1334 | handler.removeDeviceInformation(ospfRouter1); |
| 1335 | handler.removeLinkInformation(this); |
| 1336 | callDeviceAndLinkAdding(topologyForDeviceAndLink); |
| 1337 | } |
| 1338 | |
| 1339 | /** |
| 1340 | * Removes device details. |
| 1341 | * |
| 1342 | * @param routerId router id |
| 1343 | */ |
| 1344 | private void removeDeviceDetails(Ip4Address routerId) { |
| 1345 | String key = "device:" + routerId; |
| 1346 | topologyForDeviceAndLink.removeDeviceInformationMap(key); |
| 1347 | topologyForDeviceAndLink.removeLinks(routerId); |
| 1348 | } |
| 1349 | |
| 1350 | /** |
| 1351 | * Starts the inactivity timer. |
| 1352 | */ |
| 1353 | private void startInactivityTimeCheck() { |
| 1354 | if (!inActivityTimerScheduled) { |
| 1355 | log.debug("OSPFNbr::startInactivityTimeCheck"); |
| 1356 | inActivityTimeCheckTask = new InternalInactivityTimeCheck(); |
| 1357 | exServiceInActivity = Executors.newSingleThreadScheduledExecutor(); |
| 1358 | exServiceInActivity.scheduleAtFixedRate(inActivityTimeCheckTask, routerDeadInterval, |
| 1359 | routerDeadInterval, TimeUnit.SECONDS); |
| 1360 | inActivityTimerScheduled = true; |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | /** |
| 1365 | * Stops the inactivity timer. |
| 1366 | */ |
| 1367 | private void stopInactivityTimeCheck() { |
| 1368 | if (inActivityTimerScheduled) { |
| 1369 | log.debug("OSPFNbr::stopInactivityTimeCheck "); |
| 1370 | exServiceInActivity.shutdown(); |
| 1371 | inActivityTimerScheduled = false; |
| 1372 | } |
| 1373 | } |
| 1374 | |
| 1375 | /** |
| 1376 | * Starts the flooding timer. |
| 1377 | * |
| 1378 | * @param channel channel instance |
| 1379 | */ |
| 1380 | public void startFloodingTimer(Channel channel) { |
| 1381 | |
| 1382 | if (!floodingTimerScheduled) { |
| 1383 | log.debug("OSPFNbr::startFloodingTimer"); |
| 1384 | floodingTask = new InternalFloodingTask(channel); |
| 1385 | exServiceFlooding = Executors.newSingleThreadScheduledExecutor(); |
| 1386 | //Run every 5 seconds. |
| 1387 | exServiceFlooding.scheduleAtFixedRate(floodingTask, OspfParameters.START_NOW, |
| 1388 | OspfParameters.MINLSINTERVAL, TimeUnit.SECONDS); |
| 1389 | floodingTimerScheduled = true; |
| 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | /** |
| 1394 | * Stops the flooding timer. |
| 1395 | */ |
| 1396 | private void stopFloodingTimer() { |
| 1397 | if (floodingTimerScheduled) { |
| 1398 | log.debug("OSPFNbr::stopFloodingTimer "); |
| 1399 | exServiceFlooding.shutdown(); |
| 1400 | floodingTimerScheduled = false; |
| 1401 | } |
| 1402 | } |
| 1403 | |
| 1404 | /** |
| 1405 | * Starts the Dd Retransmission executor task. |
| 1406 | * |
| 1407 | * @param ch netty channel instance |
| 1408 | */ |
| 1409 | private void startRxMtDdTimer(Channel ch) { |
| 1410 | if (!rxmtDdPacketTimerScheduled) { |
| 1411 | long retransmitInterval = ospfInterface.reTransmitInterval(); |
| 1412 | rxmtDdPacketTask = new InternalRxmtDdPacket(ch); |
| 1413 | exServiceRxmtDDPacket = Executors.newSingleThreadScheduledExecutor(); |
| 1414 | exServiceRxmtDDPacket.scheduleAtFixedRate(rxmtDdPacketTask, retransmitInterval, |
| 1415 | retransmitInterval, TimeUnit.SECONDS); |
| 1416 | rxmtDdPacketTimerScheduled = true; |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | /** |
| 1421 | * Stops the Dd Retransmission executor task. |
| 1422 | */ |
| 1423 | private void stopRxMtDdTimer() { |
| 1424 | if (rxmtDdPacketTimerScheduled) { |
| 1425 | exServiceRxmtDDPacket.shutdown(); |
| 1426 | rxmtDdPacketTimerScheduled = false; |
| 1427 | } |
| 1428 | } |
| 1429 | |
| 1430 | /** |
| 1431 | * Starts Ls request retransmission executor task. |
| 1432 | * |
| 1433 | * @param ch Netty channel instance |
| 1434 | */ |
| 1435 | private void startRxMtLsrTimer(Channel ch) { |
| 1436 | if (!rxmtLsrTimerScheduled) { |
| 1437 | log.debug("OSPFNbr::startRxMtLsrTimer...!!!"); |
| 1438 | long retransmitIntrvl = ospfInterface.reTransmitInterval(); |
| 1439 | rxmtLsrPacketTask = new InternalRxmtLsrPacket(ch); |
| 1440 | exServiceRxmtLsr = Executors.newSingleThreadScheduledExecutor(); |
| 1441 | exServiceRxmtLsr.scheduleAtFixedRate(rxmtLsrPacketTask, retransmitIntrvl, |
| 1442 | retransmitIntrvl, TimeUnit.SECONDS); |
| 1443 | rxmtLsrTimerScheduled = true; |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | /** |
| 1448 | * Stops Ls request retransmission executor task. |
| 1449 | */ |
| 1450 | private void stopRxMtLsrTimer() { |
| 1451 | if (rxmtLsrTimerScheduled) { |
| 1452 | exServiceRxmtLsr.shutdown(); |
| 1453 | rxmtLsrTimerScheduled = false; |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | /** |
| 1458 | * Gets the last sent DdPacket. |
| 1459 | * |
| 1460 | * @return DdPacket instance |
| 1461 | */ |
| 1462 | public DdPacket lastDdPacket() { |
| 1463 | return lastDdPacket; |
| 1464 | } |
| 1465 | |
| 1466 | /** |
| 1467 | * Sets the last sent DdPacket. |
| 1468 | * |
| 1469 | * @param lastDdPacket DdPacket instance |
| 1470 | */ |
| 1471 | public void setLastDdPacket(DdPacket lastDdPacket) { |
| 1472 | this.lastDdPacket = lastDdPacket; |
| 1473 | } |
| 1474 | |
| 1475 | /** |
| 1476 | * Gets neighbor id. |
| 1477 | * |
| 1478 | * @return neighbor id |
| 1479 | */ |
| 1480 | public Ip4Address neighborId() { |
| 1481 | return neighborId; |
| 1482 | } |
| 1483 | |
| 1484 | /** |
| 1485 | * Sets the neighbor id. |
| 1486 | * |
| 1487 | * @param neighborId neighbor id |
| 1488 | */ |
| 1489 | public void setNeighborId(Ip4Address neighborId) { |
| 1490 | this.neighborId = neighborId; |
| 1491 | } |
| 1492 | |
| 1493 | /** |
| 1494 | * Gets the neighbor DR address. |
| 1495 | * |
| 1496 | * @return neighbor DR address |
| 1497 | */ |
| 1498 | public Ip4Address neighborDr() { |
| 1499 | return neighborDr; |
| 1500 | } |
| 1501 | |
| 1502 | /** |
| 1503 | * Sets the neighbor DR address. |
| 1504 | * |
| 1505 | * @param neighborDr neighbor DR address |
| 1506 | */ |
| 1507 | public void setNeighborDr(Ip4Address neighborDr) { |
| 1508 | this.neighborDr = neighborDr; |
| 1509 | } |
| 1510 | |
| 1511 | /** |
| 1512 | * Gets the neighbor BDR address. |
| 1513 | * |
| 1514 | * @return neighbor BDR address |
| 1515 | */ |
| 1516 | public Ip4Address neighborBdr() { |
| 1517 | return neighborBdr; |
| 1518 | } |
| 1519 | |
| 1520 | /** |
| 1521 | * Sets the neighbor BDR address. |
| 1522 | * |
| 1523 | * @param neighborBdr neighbor BDR address |
| 1524 | */ |
| 1525 | public void setNeighborBdr(Ip4Address neighborBdr) { |
| 1526 | this.neighborBdr = neighborBdr; |
| 1527 | } |
| 1528 | |
| 1529 | /** |
| 1530 | * Gets router priority. |
| 1531 | * |
| 1532 | * @return router priority |
| 1533 | */ |
| 1534 | public int routerPriority() { |
| 1535 | return routerPriority; |
| 1536 | } |
| 1537 | |
| 1538 | /** |
| 1539 | * Sets router priority. |
| 1540 | * |
| 1541 | * @param routerPriority router priority |
| 1542 | */ |
| 1543 | public void setRouterPriority(int routerPriority) { |
| 1544 | this.routerPriority = routerPriority; |
| 1545 | } |
| 1546 | |
| 1547 | /** |
| 1548 | * Gets the options value. |
| 1549 | * |
| 1550 | * @return options value |
| 1551 | */ |
| 1552 | public int options() { |
| 1553 | return options; |
| 1554 | } |
| 1555 | |
| 1556 | /** |
| 1557 | * Sets the options value. |
| 1558 | * |
| 1559 | * @param options options value |
| 1560 | */ |
| 1561 | public void setOptions(int options) { |
| 1562 | this.options = options; |
| 1563 | } |
| 1564 | |
| 1565 | /** |
| 1566 | * Gets the DD sequence number. |
| 1567 | * |
| 1568 | * @return DD sequence number |
| 1569 | */ |
| 1570 | public long ddSeqNum() { |
| 1571 | return ddSeqNum; |
| 1572 | } |
| 1573 | |
| 1574 | /** |
| 1575 | * Sets the DD sequence number. |
| 1576 | * |
| 1577 | * @param ddSeqNum DD sequence number |
| 1578 | */ |
| 1579 | public void setDdSeqNum(long ddSeqNum) { |
| 1580 | this.ddSeqNum = ddSeqNum; |
| 1581 | } |
| 1582 | |
| 1583 | /** |
| 1584 | * Gets neighbor is master or not. |
| 1585 | * |
| 1586 | * @return true if neighbor is master else false |
| 1587 | */ |
| 1588 | public int isMaster() { |
| 1589 | return isMaster; |
| 1590 | } |
| 1591 | |
| 1592 | /** |
| 1593 | * Gets the last sent DD Packet. |
| 1594 | * |
| 1595 | * @return last sent DD Packet |
| 1596 | */ |
| 1597 | public DdPacket lastSentDdPacket() { |
| 1598 | return lastSentDdPacket; |
| 1599 | } |
| 1600 | |
| 1601 | /** |
| 1602 | * Sets the last sent DD Packet. |
| 1603 | * |
| 1604 | * @param lastSentDdPacket last sent DD Packet |
| 1605 | */ |
| 1606 | public void setLastSentDdPacket(DdPacket lastSentDdPacket) { |
| 1607 | this.lastSentDdPacket = lastSentDdPacket; |
| 1608 | } |
| 1609 | |
| 1610 | /** |
| 1611 | * Gets the last sent Ls Request Packet. |
| 1612 | * |
| 1613 | * @return last sent Ls Request Packet |
| 1614 | */ |
| 1615 | public LsRequest getLastSentLsrPacket() { |
| 1616 | return lastSentLsrPacket; |
| 1617 | } |
| 1618 | |
| 1619 | /** |
| 1620 | * Sets the last sent Ls Request Packet. |
| 1621 | * |
| 1622 | * @param lastSentLsrPacket last sent Ls Request Packet |
| 1623 | */ |
| 1624 | public void setLastSentLsrPacket(LsRequest lastSentLsrPacket) { |
| 1625 | this.lastSentLsrPacket = lastSentLsrPacket; |
| 1626 | } |
| 1627 | |
| 1628 | /** |
| 1629 | * Gets the neighbors state. |
| 1630 | * |
| 1631 | * @return neighbors state |
| 1632 | */ |
| 1633 | public OspfNeighborState getState() { |
| 1634 | return state; |
| 1635 | } |
| 1636 | |
| 1637 | /** |
| 1638 | * Sets the neighbors state. |
| 1639 | * |
| 1640 | * @param state neighbors state |
| 1641 | */ |
| 1642 | public void setState(OspfNeighborState state) { |
| 1643 | this.state = state; |
| 1644 | } |
| 1645 | |
| 1646 | /** |
| 1647 | * Sets neighbor is master or not. |
| 1648 | * |
| 1649 | * @param isMaster neighbor is master or not |
| 1650 | */ |
| 1651 | public void setIsMaster(int isMaster) { |
| 1652 | this.isMaster = isMaster; |
| 1653 | } |
| 1654 | |
| 1655 | /** |
| 1656 | * Gets the ls request list. |
| 1657 | * |
| 1658 | * @return ls request list |
| 1659 | */ |
| 1660 | public Hashtable getLsReqList() { |
| 1661 | return lsReqList; |
| 1662 | } |
| 1663 | |
| 1664 | /** |
| 1665 | * Gets the reTxList instance. |
| 1666 | * |
| 1667 | * @return reTxList instance |
| 1668 | */ |
| 1669 | public Map getReTxList() { |
| 1670 | return reTxList; |
| 1671 | } |
| 1672 | |
| 1673 | /** |
| 1674 | * Gets the pending re transmit list. |
| 1675 | * |
| 1676 | * @return pendingReTxList instance |
| 1677 | */ |
| 1678 | public Map<String, OspfLsa> getPendingReTxList() { |
| 1679 | return pendingReTxList; |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | /** |
| 1684 | * Represents a Task which will do an inactivity time check. |
| 1685 | */ |
| 1686 | private class InternalInactivityTimeCheck implements Runnable { |
| 1687 | /** |
| 1688 | * Constructor. |
| 1689 | */ |
| 1690 | InternalInactivityTimeCheck() { |
| 1691 | } |
| 1692 | |
| 1693 | @Override |
| 1694 | public void run() { |
| 1695 | try { |
| 1696 | log.debug("Neighbor Not Heard till the past router dead interval ."); |
| 1697 | neighborDown(); |
| 1698 | } catch (Exception e) { |
| 1699 | log.debug("Exception at inactivity time check...!!!"); |
| 1700 | } |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | /** |
| 1705 | * Task which re transmits DdPacket every configured time interval. |
| 1706 | */ |
| 1707 | private class InternalRxmtDdPacket implements Runnable { |
| 1708 | Channel ch; |
| 1709 | |
| 1710 | /** |
| 1711 | * Creates an instance or Re transmit DD packet timer. |
| 1712 | * |
| 1713 | * @param ch netty channel instance |
| 1714 | */ |
| 1715 | InternalRxmtDdPacket(Channel ch) { |
| 1716 | this.ch = ch; |
| 1717 | } |
| 1718 | |
| 1719 | @Override |
| 1720 | public void run() { |
| 1721 | if ((ch != null) && ch.isConnected()) { |
| 1722 | DdPacket ddPacket = lastSentDdPacket(); |
| 1723 | ch.write(ddPacket); |
| 1724 | log.debug("Re-Transmit DD Packet ."); |
| 1725 | } else { |
| 1726 | log.debug( |
| 1727 | "Re-Transmit DD Packet failed. Channel not connected.."); |
| 1728 | } |
| 1729 | } |
| 1730 | } |
| 1731 | |
| 1732 | /** |
| 1733 | * Task which re transmits Ls request Packet every configured time interval. |
| 1734 | */ |
| 1735 | private class InternalRxmtLsrPacket implements Runnable { |
| 1736 | Channel ch; |
| 1737 | |
| 1738 | /** |
| 1739 | * Creates an instance or Re transmit LS Request packet timer. |
| 1740 | * |
| 1741 | * @param ch netty channel instance |
| 1742 | */ |
| 1743 | InternalRxmtLsrPacket(Channel ch) { |
| 1744 | this.ch = ch; |
| 1745 | } |
| 1746 | |
| 1747 | @Override |
| 1748 | public void run() { |
| 1749 | if ((ch != null) && ch.isConnected()) { |
| 1750 | LsRequest lsrPacket = getLastSentLsrPacket(); |
| 1751 | ch.write(lsrPacket); |
| 1752 | log.debug("Re-Transmit LSRequest Packet ."); |
| 1753 | } else { |
| 1754 | log.debug( |
| 1755 | "Re-Transmit LSRequest failed. Channel not connected.."); |
| 1756 | } |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | /** |
| 1761 | * Task which transmits Ls update Packet based on the re transmit list. |
| 1762 | * every configured time interval. |
| 1763 | */ |
| 1764 | private class InternalFloodingTask implements Runnable { |
| 1765 | Channel channel; |
| 1766 | |
| 1767 | /** |
| 1768 | * Creates an instance or Flooding task. |
| 1769 | * |
| 1770 | * @param ch netty channel instance |
| 1771 | */ |
| 1772 | InternalFloodingTask(Channel ch) { |
| 1773 | this.channel = ch; |
| 1774 | } |
| 1775 | |
| 1776 | @Override |
| 1777 | public void run() { |
| 1778 | if ((channel != null) && channel.isConnected()) { |
| 1779 | |
| 1780 | if ((pendingReTxList != null) && (pendingReTxList.size() > 0)) { |
| 1781 | List<LsUpdate> lsUpdateList = buildLsUpdate(pendingReTxList); |
| 1782 | |
| 1783 | for (LsUpdate lsupdate : lsUpdateList) { |
| 1784 | //Pending for acknowledge directly sent it to neighbor |
| 1785 | lsupdate.setDestinationIp(neighborIpAddr); |
| 1786 | channel.write(lsupdate); |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | if ((reTxList != null) && (reTxList.size() > 0)) { |
| 1791 | List<LsUpdate> lsUpdateList = buildLsUpdate(reTxList); |
| 1792 | |
| 1793 | for (LsUpdate lsupdate : lsUpdateList) { |
| 1794 | //set the destination |
| 1795 | if ((((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.DR) || |
| 1796 | (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.POINT2POINT)) { |
| 1797 | lsupdate.setDestinationIp(OspfUtil.ALL_SPF_ROUTERS); |
| 1798 | } else if (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.DROTHER || |
| 1799 | (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.BDR)) { |
| 1800 | lsupdate.setDestinationIp(neighborDr); |
| 1801 | } |
| 1802 | channel.write(lsupdate); |
| 1803 | } |
| 1804 | } |
| 1805 | } |
| 1806 | } |
| 1807 | |
| 1808 | /** |
| 1809 | * Builds the LsUpdate for flooding. |
| 1810 | * |
| 1811 | * @param txList list contains LSAs |
| 1812 | * @return list of LsUpdate instances |
| 1813 | */ |
| 1814 | private List buildLsUpdate(Map<String, OspfLsa> txList) { |
| 1815 | List<LsUpdate> lsUpdateList = new ArrayList<>(); |
| 1816 | ListIterator itr = new ArrayList(txList.keySet()).listIterator(); |
| 1817 | while (itr.hasNext()) { |
| 1818 | LsUpdate lsupdate = new LsUpdate(); |
| 1819 | // seting OSPF Header |
| 1820 | lsupdate.setOspfVer(OspfUtil.OSPF_VERSION); |
| 1821 | lsupdate.setOspftype(OspfPacketType.LSUPDATE.value()); |
| 1822 | lsupdate.setRouterId(ospfArea.routerId()); |
| 1823 | lsupdate.setAreaId(ospfArea.areaId()); |
| 1824 | lsupdate.setAuthType(OspfUtil.NOT_ASSIGNED); |
| 1825 | lsupdate.setAuthentication(OspfUtil.NOT_ASSIGNED); |
| 1826 | lsupdate.setOspfPacLength(OspfUtil.NOT_ASSIGNED); // to calculate packet length |
| 1827 | lsupdate.setChecksum(OspfUtil.NOT_ASSIGNED); |
| 1828 | |
| 1829 | //limit to mtu |
| 1830 | int currentLength = OspfUtil.OSPF_HEADER_LENGTH + OspfUtil.FOUR_BYTES; |
| 1831 | int maxSize = ospfInterface.mtu() - |
| 1832 | OspfUtil.LSA_HEADER_LENGTH; // subtract a normal IP header. |
| 1833 | |
| 1834 | int noLsa = 0; |
| 1835 | while (itr.hasNext()) { |
| 1836 | |
| 1837 | String key = (String) itr.next(); |
| 1838 | OspfLsa lsa = txList.get(key); |
| 1839 | if ((lsa.age() + OspfParameters.INFTRA_NS_DELAY) >= OspfParameters.MAXAGE) { |
| 1840 | ((LsaHeader) lsa.lsaHeader()).setAge(OspfParameters.MAXAGE); |
| 1841 | } else { |
| 1842 | ((LsaHeader) lsa.lsaHeader()).setAge(lsa.age() + OspfParameters.INFTRA_NS_DELAY); |
| 1843 | } |
| 1844 | |
| 1845 | if ((currentLength + ((LsaHeader) lsa.lsaHeader()).lsPacketLen()) >= maxSize) { |
| 1846 | itr.previous(); |
| 1847 | break; |
| 1848 | } |
| 1849 | log.debug("FloodingTimer::LSA Type::{}, Header: {}, LSA: {}", lsa.getOspfLsaType(), |
| 1850 | lsa.lsaHeader(), lsa); |
| 1851 | |
| 1852 | if (lsa != null) { |
| 1853 | lsupdate.addLsa(lsa); |
| 1854 | noLsa++; |
| 1855 | currentLength = currentLength + ((LsaHeader) lsa.lsaHeader()).lsPacketLen(); |
| 1856 | } |
| 1857 | log.debug("FloodingTimer::Removing key {}", key); |
| 1858 | if (txList.equals(reTxList)) { |
| 1859 | reTxList.remove(key); |
| 1860 | pendingReTxList.put(key, lsa); |
| 1861 | } |
| 1862 | } |
| 1863 | //set number of lsa's |
| 1864 | lsupdate.setNumberOfLsa(noLsa); |
| 1865 | lsUpdateList.add(lsupdate); |
| 1866 | } |
| 1867 | return lsUpdateList; |
| 1868 | } |
| 1869 | } |
| 1870 | } |