sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.segmentrouting; |
| 17 | |
| 18 | import org.onlab.packet.Ethernet; |
| 19 | import org.onlab.packet.Ip4Address; |
Srikanth Vavilapalli | 4db76e3 | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 20 | import org.onlab.packet.Ip4Prefix; |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 21 | import org.onlab.packet.IpPrefix; |
| 22 | import org.onlab.packet.MacAddress; |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 23 | import org.onlab.packet.MplsLabel; |
Srikanth Vavilapalli | 4db76e3 | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 24 | import org.onosproject.segmentrouting.grouphandler.NeighborSet; |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 25 | import org.onosproject.net.DeviceId; |
| 26 | import org.onosproject.net.Link; |
| 27 | import org.onosproject.net.PortNumber; |
| 28 | import org.onosproject.net.flow.DefaultFlowRule; |
| 29 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 30 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 31 | import org.onosproject.net.flow.FlowRule; |
| 32 | import org.onosproject.net.flow.TrafficSelector; |
| 33 | import org.onosproject.net.flow.TrafficTreatment; |
| 34 | import org.onosproject.net.group.DefaultGroupKey; |
| 35 | import org.onosproject.net.group.Group; |
| 36 | import org.slf4j.Logger; |
| 37 | import org.slf4j.LoggerFactory; |
| 38 | |
| 39 | import java.util.ArrayList; |
| 40 | import java.util.Collection; |
| 41 | import java.util.List; |
| 42 | import java.util.Set; |
| 43 | |
| 44 | import static com.google.common.base.Preconditions.checkNotNull; |
| 45 | |
| 46 | public class RoutingRulePopulator { |
| 47 | |
| 48 | private static final Logger log = LoggerFactory.getLogger(RoutingRulePopulator.class); |
| 49 | |
| 50 | private SegmentRoutingManager srManager; |
| 51 | private NetworkConfigHandler config; |
| 52 | |
| 53 | /** |
| 54 | * Creates a RoutingRulePopulator object. |
| 55 | * |
Thomas Vachuska | e10f56b | 2015-04-15 18:20:08 -0700 | [diff] [blame] | 56 | * @param srManager segment routing manager reference |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 57 | */ |
| 58 | public RoutingRulePopulator(SegmentRoutingManager srManager) { |
| 59 | this.srManager = srManager; |
| 60 | this.config = checkNotNull(srManager.networkConfigHandler); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Populates IP flow rules for specific hosts directly connected to the switch. |
| 65 | * |
| 66 | * @param deviceId switch ID to set the rules |
| 67 | * @param hostIp host IP address |
| 68 | * @param hostMac host MAC address |
| 69 | * @param outPort port where the host is connected |
| 70 | */ |
| 71 | public void populateIpRuleForHost(DeviceId deviceId, Ip4Address hostIp, |
| 72 | MacAddress hostMac, PortNumber outPort) { |
| 73 | TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| 74 | TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| 75 | |
| 76 | sbuilder.matchIPDst(IpPrefix.valueOf(hostIp, 32)); |
| 77 | sbuilder.matchEthType(Ethernet.TYPE_IPV4); |
| 78 | |
| 79 | tbuilder.setEthDst(hostMac) |
| 80 | .setEthSrc(config.getRouterMacAddress(deviceId)) |
| 81 | .setOutput(outPort); |
| 82 | |
| 83 | TrafficTreatment treatment = tbuilder.build(); |
| 84 | TrafficSelector selector = sbuilder.build(); |
| 85 | |
| 86 | FlowRule f = new DefaultFlowRule(deviceId, selector, treatment, 100, |
| 87 | srManager.appId, 600, false, FlowRule.Type.IP); |
| 88 | |
| 89 | srManager.flowRuleService.applyFlowRules(f); |
| 90 | log.debug("Flow rule {} is set to switch {}", f, deviceId); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Populates IP flow rules for the subnets of the destination router. |
| 95 | * |
| 96 | * @param deviceId switch ID to set the rules |
Srikanth Vavilapalli | 4db76e3 | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 97 | * @param subnets subnet information |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 98 | * @param destSw destination switch ID |
| 99 | * @param nextHops next hop switch ID list |
| 100 | * @return true if all rules are set successfully, false otherwise |
| 101 | */ |
Srikanth Vavilapalli | 4db76e3 | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 102 | public boolean populateIpRuleForSubnet(DeviceId deviceId, List<Ip4Prefix> subnets, |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 103 | DeviceId destSw, Set<DeviceId> nextHops) { |
| 104 | |
Srikanth Vavilapalli | 4db76e3 | 2015-04-07 15:12:32 -0700 | [diff] [blame] | 105 | //List<IpPrefix> subnets = extractSubnet(subnetInfo); |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 106 | for (IpPrefix subnet: subnets) { |
| 107 | if (!populateIpRuleForRouter(deviceId, subnet, destSw, nextHops)) { |
| 108 | return false; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Populates IP flow rules for the router IP address. |
| 117 | * |
| 118 | * @param deviceId device ID to set the rules |
| 119 | * @param ipPrefix the IP address of the destination router |
| 120 | * @param destSw device ID of the destination router |
| 121 | * @param nextHops next hop switch ID list |
| 122 | * @return true if all rules are set successfully, false otherwise |
| 123 | */ |
| 124 | public boolean populateIpRuleForRouter(DeviceId deviceId, IpPrefix ipPrefix, |
| 125 | DeviceId destSw, Set<DeviceId> nextHops) { |
| 126 | |
| 127 | TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| 128 | TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| 129 | |
| 130 | sbuilder.matchIPDst(ipPrefix); |
| 131 | sbuilder.matchEthType(Ethernet.TYPE_IPV4); |
| 132 | |
| 133 | NeighborSet ns = null; |
| 134 | |
| 135 | //If the next hop is the same as the final destination, then MPLS label is not set. |
| 136 | if (nextHops.size() == 1 && nextHops.toArray()[0].equals(destSw)) { |
| 137 | tbuilder.decNwTtl(); |
| 138 | ns = new NeighborSet(nextHops); |
| 139 | } else { |
| 140 | tbuilder.copyTtlOut(); |
| 141 | ns = new NeighborSet(nextHops, config.getMplsId(destSw)); |
| 142 | } |
| 143 | |
| 144 | DefaultGroupKey groupKey = (DefaultGroupKey) srManager.getGroupKey(ns); |
| 145 | if (groupKey == null) { |
| 146 | log.warn("Group key is not found for ns {}", ns); |
| 147 | return false; |
| 148 | } |
| 149 | Group group = srManager.groupService.getGroup(deviceId, groupKey); |
| 150 | if (group != null) { |
| 151 | tbuilder.group(group.id()); |
| 152 | } else { |
| 153 | log.warn("No group found for NeighborSet {} from {} to {}", |
| 154 | ns, deviceId, destSw); |
| 155 | return false; |
| 156 | } |
| 157 | |
| 158 | TrafficTreatment treatment = tbuilder.build(); |
| 159 | TrafficSelector selector = sbuilder.build(); |
| 160 | |
| 161 | FlowRule f = new DefaultFlowRule(deviceId, selector, treatment, 100, |
| 162 | srManager.appId, 600, false, FlowRule.Type.IP); |
| 163 | |
| 164 | srManager.flowRuleService.applyFlowRules(f); |
| 165 | log.debug("IP flow rule {} is set to switch {}", f, deviceId); |
| 166 | |
| 167 | return true; |
| 168 | } |
| 169 | |
| 170 | |
| 171 | /** |
| 172 | * Populates MPLS flow rules to all transit routers. |
| 173 | * |
| 174 | * @param deviceId device ID of the switch to set the rules |
| 175 | * @param destSwId destination switch device ID |
| 176 | * @param nextHops next hops switch ID list |
| 177 | * @return true if all rules are set successfully, false otherwise |
| 178 | */ |
| 179 | public boolean populateMplsRule(DeviceId deviceId, DeviceId destSwId, Set<DeviceId> nextHops) { |
| 180 | |
| 181 | TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| 182 | Collection<TrafficTreatment> treatments = new ArrayList<>(); |
| 183 | |
| 184 | // TODO Handle the case of Bos == false |
| 185 | sbuilder.matchMplsLabel(MplsLabel.mplsLabel(config.getMplsId(destSwId))); |
| 186 | sbuilder.matchEthType(Ethernet.MPLS_UNICAST); |
| 187 | |
| 188 | //If the next hop is the destination router, do PHP |
| 189 | if (nextHops.size() == 1 && destSwId.equals(nextHops.toArray()[0])) { |
| 190 | TrafficTreatment treatmentBos = |
| 191 | getMplsTreatment(deviceId, destSwId, nextHops, true, true); |
| 192 | TrafficTreatment treatment = |
| 193 | getMplsTreatment(deviceId, destSwId, nextHops, true, false); |
| 194 | if (treatmentBos != null) { |
| 195 | treatments.add(treatmentBos); |
| 196 | } else { |
| 197 | log.warn("Failed to set MPLS rules."); |
| 198 | return false; |
| 199 | } |
| 200 | } else { |
| 201 | TrafficTreatment treatmentBos = |
| 202 | getMplsTreatment(deviceId, destSwId, nextHops, false, true); |
| 203 | TrafficTreatment treatment = |
| 204 | getMplsTreatment(deviceId, destSwId, nextHops, false, false); |
| 205 | |
| 206 | if (treatmentBos != null) { |
| 207 | treatments.add(treatmentBos); |
| 208 | } else { |
| 209 | log.warn("Failed to set MPLS rules."); |
| 210 | return false; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | TrafficSelector selector = sbuilder.build(); |
| 215 | for (TrafficTreatment treatment: treatments) { |
| 216 | FlowRule f = new DefaultFlowRule(deviceId, selector, treatment, 100, |
| 217 | srManager.appId, 600, false, FlowRule.Type.MPLS); |
| 218 | srManager.flowRuleService.applyFlowRules(f); |
| 219 | log.debug("MPLS rule {} is set to {}", f, deviceId); |
| 220 | } |
| 221 | |
| 222 | return true; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | private TrafficTreatment getMplsTreatment(DeviceId deviceId, DeviceId destSw, |
| 227 | Set<DeviceId> nextHops, |
| 228 | boolean phpRequired, boolean isBos) { |
| 229 | |
| 230 | TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| 231 | |
| 232 | if (phpRequired) { |
| 233 | tbuilder.copyTtlIn(); |
| 234 | if (isBos) { |
| 235 | tbuilder.popMpls(Ethernet.TYPE_IPV4) |
| 236 | .decNwTtl(); |
| 237 | } else { |
| 238 | tbuilder.popMpls(Ethernet.MPLS_UNICAST) |
| 239 | .decMplsTtl(); |
| 240 | } |
| 241 | } else { |
| 242 | tbuilder.decMplsTtl(); |
| 243 | } |
| 244 | |
| 245 | if (config.isEcmpNotSupportedInTransit(deviceId) |
| 246 | && config.isTransitRouter(deviceId)) { |
| 247 | Link link = selectOneLink(deviceId, nextHops); |
| 248 | if (link == null) { |
| 249 | log.warn("No link from {} to {}", deviceId, nextHops); |
| 250 | return null; |
| 251 | } |
| 252 | tbuilder.setEthSrc(config.getRouterMacAddress(deviceId)) |
| 253 | .setEthDst(config.getRouterMacAddress(link.dst().deviceId())) |
| 254 | .setOutput(link.src().port()); |
| 255 | } else { |
| 256 | NeighborSet ns = new NeighborSet(nextHops); |
| 257 | DefaultGroupKey groupKey = (DefaultGroupKey) srManager.getGroupKey(ns); |
| 258 | if (groupKey == null) { |
| 259 | log.warn("Group key is not found for ns {}", ns); |
| 260 | return null; |
| 261 | } |
| 262 | Group group = srManager.groupService.getGroup(deviceId, groupKey); |
| 263 | if (group != null) { |
| 264 | tbuilder.group(group.id()); |
| 265 | } else { |
| 266 | log.warn("No group found for ns {} key {} in {}", ns, |
| 267 | srManager.getGroupKey(ns), deviceId); |
| 268 | return null; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | return tbuilder.build(); |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Populates VLAN flows rules. |
| 277 | * All packets are forwarded to TMAC table. |
| 278 | * |
| 279 | * @param deviceId switch ID to set the rules |
| 280 | */ |
| 281 | public void populateTableVlan(DeviceId deviceId) { |
| 282 | TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| 283 | TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| 284 | |
| 285 | tbuilder.transition(FlowRule.Type.ETHER); |
| 286 | |
| 287 | TrafficTreatment treatment = tbuilder.build(); |
| 288 | TrafficSelector selector = sbuilder.build(); |
| 289 | |
| 290 | FlowRule f = new DefaultFlowRule(deviceId, selector, treatment, 100, |
| 291 | srManager.appId, 600, false, FlowRule.Type.VLAN); |
| 292 | |
| 293 | srManager.flowRuleService.applyFlowRules(f); |
| 294 | |
| 295 | log.debug("Vlan flow rule {} is set to switch {}", f, deviceId); |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Populates TMAC table rules. |
| 300 | * IP packets are forwarded to IP table. |
| 301 | * MPLS packets are forwarded to MPLS table. |
| 302 | * |
| 303 | * @param deviceId switch ID to set the rules |
| 304 | */ |
| 305 | public void populateTableTMac(DeviceId deviceId) { |
| 306 | |
| 307 | // flow rule for IP packets |
| 308 | TrafficSelector selectorIp = DefaultTrafficSelector.builder() |
| 309 | .matchEthType(Ethernet.TYPE_IPV4) |
| 310 | .matchEthDst(config.getRouterMacAddress(deviceId)) |
| 311 | .build(); |
| 312 | TrafficTreatment treatmentIp = DefaultTrafficTreatment.builder() |
| 313 | .transition(FlowRule.Type.IP) |
| 314 | .build(); |
| 315 | |
| 316 | FlowRule flowIp = new DefaultFlowRule(deviceId, selectorIp, treatmentIp, 100, |
| 317 | srManager.appId, 600, false, FlowRule.Type.ETHER); |
| 318 | |
| 319 | srManager.flowRuleService.applyFlowRules(flowIp); |
| 320 | |
| 321 | // flow rule for MPLS packets |
| 322 | TrafficSelector selectorMpls = DefaultTrafficSelector.builder() |
| 323 | .matchEthType(Ethernet.MPLS_UNICAST) |
| 324 | .matchEthDst(config.getRouterMacAddress(deviceId)) |
| 325 | .build(); |
| 326 | TrafficTreatment treatmentMpls = DefaultTrafficTreatment.builder() |
| 327 | .transition(FlowRule.Type.MPLS) |
| 328 | .build(); |
| 329 | |
| 330 | FlowRule flowMpls = new DefaultFlowRule(deviceId, selectorMpls, treatmentMpls, 100, |
| 331 | srManager.appId, 600, false, FlowRule.Type.ETHER); |
| 332 | |
| 333 | srManager.flowRuleService.applyFlowRules(flowMpls); |
| 334 | |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * Populates a table miss entry. |
| 339 | * |
| 340 | * @param deviceId switch ID to set rules |
| 341 | * @param tableToAdd table to set the rules |
| 342 | * @param toControllerNow flag to send packets to controller immediately |
| 343 | * @param toControllerWrite flag to send packets to controller at the end of pipeline |
| 344 | * @param toTable flag to send packets to a specific table |
| 345 | * @param tableToSend table type to send packets when the toTable flag is set |
| 346 | */ |
| 347 | public void populateTableMissEntry(DeviceId deviceId, FlowRule.Type tableToAdd, boolean toControllerNow, |
| 348 | boolean toControllerWrite, |
| 349 | boolean toTable, FlowRule.Type tableToSend) { |
| 350 | // TODO: Change arguments to EnumSet |
| 351 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 352 | .build(); |
| 353 | TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder(); |
| 354 | |
| 355 | if (toControllerNow) { |
| 356 | tBuilder.setOutput(PortNumber.CONTROLLER); |
| 357 | } |
| 358 | |
| 359 | if (toControllerWrite) { |
| 360 | tBuilder.deferred().setOutput(PortNumber.CONTROLLER); |
| 361 | } |
| 362 | |
| 363 | if (toTable) { |
| 364 | tBuilder.transition(tableToSend); |
| 365 | } |
| 366 | |
| 367 | FlowRule flow = new DefaultFlowRule(deviceId, selector, tBuilder.build(), 0, |
| 368 | srManager.appId, 600, false, tableToAdd); |
| 369 | |
| 370 | srManager.flowRuleService.applyFlowRules(flow); |
| 371 | |
| 372 | } |
| 373 | |
sangho | b35a619 | 2015-04-01 13:05:26 -0700 | [diff] [blame] | 374 | private Link selectOneLink(DeviceId srcId, Set<DeviceId> destIds) { |
| 375 | |
| 376 | Set<Link> links = srManager.linkService.getDeviceEgressLinks(srcId); |
| 377 | DeviceId destId = (DeviceId) destIds.toArray()[0]; |
| 378 | for (Link link: links) { |
| 379 | if (link.dst().deviceId().equals(destId)) { |
| 380 | return link; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return null; |
| 385 | } |
| 386 | |
| 387 | } |