Kiran Ramachandra | e8699cd | 2016-02-17 17:15:21 +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 | e8699cd | 2016-02-17 17:15:21 +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.lsdb; |
| 17 | |
| 18 | import org.jboss.netty.channel.Channel; |
| 19 | import org.onosproject.ospf.controller.LsaWrapper; |
| 20 | import org.onosproject.ospf.controller.OspfArea; |
| 21 | import org.onosproject.ospf.controller.OspfInterface; |
| 22 | import org.onosproject.ospf.controller.OspfLsaType; |
| 23 | import org.onosproject.ospf.controller.area.OspfAreaImpl; |
| 24 | import org.onosproject.ospf.controller.area.OspfInterfaceImpl; |
| 25 | import org.onosproject.ospf.protocol.lsa.LsaHeader; |
| 26 | import org.onosproject.ospf.protocol.lsa.types.NetworkLsa; |
| 27 | import org.onosproject.ospf.protocol.lsa.types.RouterLsa; |
| 28 | import org.onosproject.ospf.protocol.util.ChecksumCalculator; |
| 29 | import org.onosproject.ospf.protocol.util.OspfInterfaceState; |
| 30 | import org.onosproject.ospf.protocol.util.OspfParameters; |
| 31 | import org.onosproject.ospf.protocol.util.OspfUtil; |
| 32 | import org.slf4j.Logger; |
| 33 | import org.slf4j.LoggerFactory; |
| 34 | |
| 35 | import java.util.concurrent.BlockingQueue; |
| 36 | |
| 37 | /** |
| 38 | * Consumes LSA from the Queue and processes it. |
| 39 | * Its a producer consumer implementation using Blocking queue. |
| 40 | */ |
| 41 | public class LsaQueueConsumer implements Runnable { |
| 42 | private static final Logger log = LoggerFactory.getLogger(LsaQueueConsumer.class); |
| 43 | private BlockingQueue queue = null; |
| 44 | private Channel channel; |
| 45 | private OspfArea ospfArea; |
| 46 | |
| 47 | /** |
| 48 | * Creates an instance of LSA queue consumer. |
| 49 | * |
| 50 | * @param queue queue instance |
| 51 | * @param channel netty channel instance |
| 52 | * @param ospfArea OSPF area instance |
| 53 | */ |
| 54 | public LsaQueueConsumer(BlockingQueue queue, Channel channel, OspfArea ospfArea) { |
| 55 | this.queue = queue; |
| 56 | this.channel = channel; |
| 57 | this.ospfArea = ospfArea; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Threads run method. |
| 62 | */ |
| 63 | public void run() { |
| 64 | log.debug("LSAQueueConsumer:run...!!!"); |
| 65 | try { |
| 66 | while (true) { |
| 67 | if (!queue.isEmpty()) { |
| 68 | LsaWrapper wrapper = (LsaWrapper) queue.take(); |
| 69 | String lsaProcessing = wrapper.lsaProcessing(); |
| 70 | switch (lsaProcessing) { |
| 71 | case OspfParameters.VERIFYCHECKSUM: |
| 72 | log.debug("LSAQueueConsumer: Message - " + OspfParameters.VERIFYCHECKSUM + " consumed."); |
| 73 | processVerifyChecksum(wrapper); |
| 74 | break; |
| 75 | case OspfParameters.REFRESHLSA: |
| 76 | log.debug("LSAQueueConsumer: Message - " + OspfParameters.REFRESHLSA + " consumed."); |
| 77 | processRefreshLsa(wrapper); |
| 78 | break; |
| 79 | case OspfParameters.MAXAGELSA: |
| 80 | log.debug("LSAQueueConsumer: Message - " + OspfParameters.MAXAGELSA + " consumed."); |
| 81 | processMaxAgeLsa(wrapper); |
| 82 | break; |
| 83 | default: |
| 84 | log.debug("Unknown command to process the LSA in queue ...!!!"); |
| 85 | break; |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | } catch (Exception e) { |
| 91 | log.debug("Error::LSAQueueConsumer::{}", e.getMessage()); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Processes verify checksum - checkAges. |
| 97 | * |
| 98 | * @param wrapper LSA wrapper instance |
| 99 | */ |
| 100 | private void processVerifyChecksum(LsaWrapper wrapper) throws Exception { |
| 101 | ChecksumCalculator checkSum = new ChecksumCalculator(); |
| 102 | if (!checkSum.isValidLsaCheckSum(wrapper.ospfLsa(), ((LsaWrapperImpl) wrapper).lsaHeader().lsType(), |
| 103 | OspfUtil.LSAPACKET_CHECKSUM_POS1, |
| 104 | OspfUtil.LSAPACKET_CHECKSUM_POS2)) { |
| 105 | log.debug("LSAQueueConsumer::Checksum mismatch. Received LSA packet type {} ", |
| 106 | ((LsaWrapperImpl) wrapper).lsaHeader().lsType()); |
| 107 | |
| 108 | //Checksum Invalid |
| 109 | //RFC 2328 Restart the Router. |
| 110 | //Currently we are not restarting. We are not handling this case. |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Process refresh LSA. |
| 116 | * |
| 117 | * @param wrapper LSA wrapper instance |
| 118 | */ |
| 119 | private void processRefreshLsa(LsaWrapper wrapper) throws Exception { |
| 120 | if (wrapper.isSelfOriginated()) { //self originated |
| 121 | //set the destination |
| 122 | OspfInterface ospfInterface = wrapper.ospfInterface(); |
| 123 | if (ospfInterface != null) { |
| 124 | LsaHeader header = ((LsaWrapperImpl) wrapper).lsaHeader(); |
| 125 | header.setAge(wrapper.currentAge()); |
| 126 | if (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.DR) { |
| 127 | if (header.lsType() == OspfLsaType.ROUTER.value()) { |
| 128 | RouterLsa routerLsa = ((OspfAreaImpl) ospfArea).buildRouterLsa(ospfInterface); |
| 129 | ((OspfAreaImpl) ospfArea).addLsa(routerLsa, true, ospfInterface); |
| 130 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(routerLsa); |
| 131 | } else if (header.lsType() == OspfLsaType.NETWORK.value()) { |
| 132 | if (ospfInterface.listOfNeighbors().size() > 0) { |
| 133 | NetworkLsa networkLsa = ((OspfAreaImpl) ospfArea).buildNetworkLsa( |
| 134 | ospfInterface.ipAddress(), ospfInterface.ipNetworkMask()); |
| 135 | ospfArea.addLsa(networkLsa, true, ospfInterface); |
| 136 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(networkLsa); |
| 137 | } |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | if (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.BDR || |
| 142 | ((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.POINT2POINT || |
| 143 | ((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.DROTHER) { |
| 144 | ospfArea.refreshArea(ospfInterface); |
| 145 | } |
| 146 | log.debug("LSAQueueConsumer: processRefreshLsa - Flooded SelfOriginated LSA {}", |
| 147 | ((LsaWrapperImpl) wrapper).lsaHeader()); |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Process max age LSA. |
| 154 | * |
| 155 | * @param wrapper LSA wrapper instance |
| 156 | */ |
| 157 | private void processMaxAgeLsa(LsaWrapper wrapper) { |
| 158 | //set the destination |
| 159 | OspfInterface ospfInterface = wrapper.ospfInterface(); |
| 160 | if (ospfInterface != null) { |
| 161 | LsaHeader header = (LsaHeader) wrapper.ospfLsa().lsaHeader(); |
| 162 | header.setAge(OspfParameters.MAXAGE); |
| 163 | ((LsaWrapperImpl) wrapper).lsaHeader().setAge(OspfParameters.MAXAGE); |
| 164 | if (((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.DR || |
| 165 | ((OspfInterfaceImpl) ospfInterface).state() == OspfInterfaceState.POINT2POINT) { |
| 166 | //remove from db |
| 167 | ((OspfAreaImpl) ospfArea).addToOtherNeighborLsaTxList(((LsaWrapperImpl) wrapper).lsaHeader()); |
| 168 | ((OspfAreaImpl) ospfArea).deleteLsa(((LsaWrapperImpl) wrapper).lsaHeader()); |
| 169 | } else { |
| 170 | ((OspfAreaImpl) ospfArea).deleteLsa(((LsaWrapperImpl) wrapper).lsaHeader()); |
| 171 | } |
| 172 | log.debug("LSAQueueConsumer: processMaxAgeLsa - Flooded SelfOriginated-Max Age LSA {}", |
| 173 | ((LsaWrapperImpl) wrapper).lsaHeader()); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Sets the channel. |
| 179 | * |
| 180 | * @param channel channel instance |
| 181 | */ |
| 182 | public void setChannel(Channel channel) { |
| 183 | this.channel = channel; |
| 184 | } |
| 185 | } |