Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [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.net.intent.impl.compiler; |
| 17 | |
Jian Li | 11260a0 | 2016-05-19 13:07:22 -0700 | [diff] [blame^] | 18 | import com.google.common.collect.ImmutableList; |
| 19 | import com.google.common.collect.Sets; |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 20 | import org.onlab.packet.EthType; |
| 21 | import org.onlab.packet.Ethernet; |
| 22 | import org.onlab.packet.MplsLabel; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 23 | import org.onlab.packet.VlanId; |
| 24 | import org.onosproject.net.ConnectPoint; |
| 25 | import org.onosproject.net.DeviceId; |
| 26 | import org.onosproject.net.Link; |
| 27 | import org.onosproject.net.LinkKey; |
| 28 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 29 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 30 | import org.onosproject.net.flow.TrafficSelector; |
| 31 | import org.onosproject.net.flow.TrafficTreatment; |
| 32 | import org.onosproject.net.flow.criteria.Criterion; |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 33 | import org.onosproject.net.flow.criteria.EthTypeCriterion; |
| 34 | import org.onosproject.net.flow.criteria.MplsCriterion; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 35 | import org.onosproject.net.flow.criteria.VlanIdCriterion; |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 36 | import org.onosproject.net.flow.instructions.Instruction; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 37 | import org.onosproject.net.flow.instructions.L2ModificationInstruction; |
| 38 | import org.onosproject.net.intent.PathIntent; |
| 39 | import org.onosproject.net.intent.constraint.EncapsulationConstraint; |
| 40 | import org.onosproject.net.intent.impl.IntentCompilationException; |
Sho SHIMIZU | e18cb12 | 2016-02-22 21:04:56 -0800 | [diff] [blame] | 41 | import org.onosproject.net.resource.Resource; |
| 42 | import org.onosproject.net.resource.ResourceAllocation; |
| 43 | import org.onosproject.net.resource.ResourceService; |
| 44 | import org.onosproject.net.resource.Resources; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 45 | import org.slf4j.Logger; |
| 46 | |
Jian Li | 11260a0 | 2016-05-19 13:07:22 -0700 | [diff] [blame^] | 47 | import java.util.Collections; |
| 48 | import java.util.HashMap; |
| 49 | import java.util.Iterator; |
| 50 | import java.util.List; |
| 51 | import java.util.Map; |
| 52 | import java.util.Optional; |
| 53 | import java.util.Set; |
| 54 | import java.util.stream.Collectors; |
| 55 | import java.util.stream.Stream; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 56 | |
| 57 | import static org.onosproject.net.LinkKey.linkKey; |
| 58 | |
| 59 | /** |
| 60 | * Shared APIs and implementations for path compilers. |
| 61 | */ |
| 62 | |
| 63 | public class PathCompiler<T> { |
| 64 | |
| 65 | /** |
| 66 | * Defines methods used to create objects representing flows. |
| 67 | */ |
| 68 | public interface PathCompilerCreateFlow<T> { |
| 69 | |
| 70 | void createFlow(TrafficSelector originalSelector, |
| 71 | TrafficTreatment originalTreatment, |
| 72 | ConnectPoint ingress, ConnectPoint egress, |
| 73 | int priority, |
| 74 | boolean applyTreatment, |
| 75 | List<T> flows, |
| 76 | List<DeviceId> devices); |
| 77 | |
| 78 | Logger log(); |
| 79 | |
| 80 | ResourceService resourceService(); |
| 81 | } |
| 82 | |
| 83 | private boolean isLast(List<Link> links, int i) { |
| 84 | return i == links.size() - 2; |
| 85 | } |
| 86 | |
| 87 | private Map<LinkKey, VlanId> assignVlanId(PathCompilerCreateFlow creator, PathIntent intent) { |
| 88 | Set<LinkKey> linkRequest = |
| 89 | Sets.newHashSetWithExpectedSize(intent.path() |
| 90 | .links().size() - 2); |
| 91 | for (int i = 1; i <= intent.path().links().size() - 2; i++) { |
| 92 | LinkKey link = linkKey(intent.path().links().get(i)); |
| 93 | linkRequest.add(link); |
| 94 | // add the inverse link. I want that the VLANID is reserved both for |
| 95 | // the direct and inverse link |
| 96 | linkRequest.add(linkKey(link.dst(), link.src())); |
| 97 | } |
| 98 | |
| 99 | Map<LinkKey, VlanId> vlanIds = findVlanIds(creator, linkRequest); |
| 100 | if (vlanIds.isEmpty()) { |
| 101 | creator.log().warn("No VLAN IDs available"); |
| 102 | return Collections.emptyMap(); |
| 103 | } |
| 104 | |
| 105 | //same VLANID is used for both directions |
| 106 | Set<Resource> resources = vlanIds.entrySet().stream() |
| 107 | .flatMap(x -> Stream.of( |
| 108 | Resources.discrete(x.getKey().src().deviceId(), x.getKey().src().port(), x.getValue()) |
| 109 | .resource(), |
| 110 | Resources.discrete(x.getKey().dst().deviceId(), x.getKey().dst().port(), x.getValue()) |
| 111 | .resource() |
| 112 | )) |
| 113 | .collect(Collectors.toSet()); |
Sho SHIMIZU | e18cb12 | 2016-02-22 21:04:56 -0800 | [diff] [blame] | 114 | List<ResourceAllocation> allocations = |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 115 | creator.resourceService().allocate(intent.id(), ImmutableList.copyOf(resources)); |
| 116 | if (allocations.isEmpty()) { |
Sho SHIMIZU | f36a836 | 2016-03-30 11:09:57 -0700 | [diff] [blame] | 117 | return Collections.emptyMap(); |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | return vlanIds; |
| 121 | } |
| 122 | |
| 123 | private Map<LinkKey, VlanId> findVlanIds(PathCompilerCreateFlow creator, Set<LinkKey> links) { |
| 124 | Map<LinkKey, VlanId> vlanIds = new HashMap<>(); |
| 125 | for (LinkKey link : links) { |
| 126 | Set<VlanId> forward = findVlanId(creator, link.src()); |
| 127 | Set<VlanId> backward = findVlanId(creator, link.dst()); |
| 128 | Set<VlanId> common = Sets.intersection(forward, backward); |
| 129 | if (common.isEmpty()) { |
| 130 | continue; |
| 131 | } |
| 132 | vlanIds.put(link, common.iterator().next()); |
| 133 | } |
| 134 | return vlanIds; |
| 135 | } |
| 136 | |
| 137 | private Set<VlanId> findVlanId(PathCompilerCreateFlow creator, ConnectPoint cp) { |
| 138 | return creator.resourceService().getAvailableResourceValues( |
| 139 | Resources.discrete(cp.deviceId(), cp.port()).id(), |
| 140 | VlanId.class); |
| 141 | } |
| 142 | |
| 143 | private void manageVlanEncap(PathCompilerCreateFlow<T> creator, List<T> flows, |
| 144 | List<DeviceId> devices, |
| 145 | PathIntent intent) { |
| 146 | Map<LinkKey, VlanId> vlanIds = assignVlanId(creator, intent); |
| 147 | |
| 148 | Iterator<Link> links = intent.path().links().iterator(); |
| 149 | Link srcLink = links.next(); |
| 150 | |
| 151 | Link link = links.next(); |
| 152 | |
| 153 | // Ingress traffic |
| 154 | VlanId vlanId = vlanIds.get(linkKey(link)); |
| 155 | if (vlanId == null) { |
| 156 | throw new IntentCompilationException("No available VLAN ID for " + link); |
| 157 | } |
| 158 | VlanId prevVlanId = vlanId; |
| 159 | |
| 160 | Optional<VlanIdCriterion> vlanCriterion = intent.selector().criteria() |
| 161 | .stream().filter(criterion -> criterion.type() == Criterion.Type.VLAN_VID) |
| 162 | .map(criterion -> (VlanIdCriterion) criterion) |
| 163 | .findAny(); |
| 164 | |
| 165 | //Push VLAN if selector does not include VLAN |
| 166 | TrafficTreatment.Builder treatBuilder = DefaultTrafficTreatment.builder(); |
| 167 | if (!vlanCriterion.isPresent()) { |
| 168 | treatBuilder.pushVlan(); |
| 169 | } |
| 170 | //Tag the traffic with the new encapsulation VLAN |
| 171 | treatBuilder.setVlanId(vlanId); |
| 172 | creator.createFlow(intent.selector(), treatBuilder.build(), |
| 173 | srcLink.dst(), link.src(), intent.priority(), true, |
| 174 | flows, devices); |
| 175 | |
| 176 | ConnectPoint prev = link.dst(); |
| 177 | |
| 178 | while (links.hasNext()) { |
| 179 | |
| 180 | link = links.next(); |
| 181 | |
| 182 | if (links.hasNext()) { |
| 183 | // Transit traffic |
| 184 | VlanId egressVlanId = vlanIds.get(linkKey(link)); |
| 185 | if (egressVlanId == null) { |
| 186 | throw new IntentCompilationException("No available VLAN ID for " + link); |
| 187 | } |
| 188 | prevVlanId = egressVlanId; |
| 189 | |
| 190 | TrafficSelector transitSelector = DefaultTrafficSelector.builder() |
| 191 | .matchInPort(prev.port()) |
| 192 | .matchVlanId(prevVlanId).build(); |
| 193 | |
| 194 | TrafficTreatment.Builder transitTreat = DefaultTrafficTreatment.builder(); |
| 195 | |
| 196 | // Set the new vlanId only if the previous one is different |
| 197 | if (!prevVlanId.equals(egressVlanId)) { |
| 198 | transitTreat.setVlanId(egressVlanId); |
| 199 | } |
| 200 | creator.createFlow(transitSelector, |
| 201 | transitTreat.build(), prev, link.src(), |
| 202 | intent.priority(), true, flows, devices); |
| 203 | prev = link.dst(); |
| 204 | } else { |
| 205 | // Egress traffic |
| 206 | TrafficSelector egressSelector = DefaultTrafficSelector.builder() |
| 207 | .matchInPort(prev.port()) |
| 208 | .matchVlanId(prevVlanId).build(); |
| 209 | TrafficTreatment.Builder egressTreat = DefaultTrafficTreatment.builder(intent.treatment()); |
| 210 | |
| 211 | Optional<L2ModificationInstruction.ModVlanIdInstruction> modVlanIdInstruction = intent.treatment() |
| 212 | .allInstructions().stream().filter( |
| 213 | instruction -> instruction instanceof L2ModificationInstruction.ModVlanIdInstruction) |
| 214 | .map(x -> (L2ModificationInstruction.ModVlanIdInstruction) x).findAny(); |
| 215 | |
Jian Li | 11260a0 | 2016-05-19 13:07:22 -0700 | [diff] [blame^] | 216 | Optional<L2ModificationInstruction.ModVlanHeaderInstruction> popVlanInstruction = intent.treatment() |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 217 | .allInstructions().stream().filter( |
Jian Li | 11260a0 | 2016-05-19 13:07:22 -0700 | [diff] [blame^] | 218 | instruction -> instruction instanceof |
| 219 | L2ModificationInstruction.ModVlanHeaderInstruction) |
| 220 | .map(x -> (L2ModificationInstruction.ModVlanHeaderInstruction) x).findAny(); |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 221 | |
| 222 | if (!modVlanIdInstruction.isPresent() && !popVlanInstruction.isPresent()) { |
| 223 | if (vlanCriterion.isPresent()) { |
| 224 | egressTreat.setVlanId(vlanCriterion.get().vlanId()); |
| 225 | } else { |
| 226 | egressTreat.popVlan(); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | creator.createFlow(egressSelector, |
| 231 | egressTreat.build(), prev, link.src(), |
| 232 | intent.priority(), true, flows, devices); |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 237 | private Map<LinkKey, MplsLabel> assignMplsLabel(PathCompilerCreateFlow creator, PathIntent intent) { |
| 238 | Set<LinkKey> linkRequest = |
| 239 | Sets.newHashSetWithExpectedSize(intent.path() |
| 240 | .links().size() - 2); |
| 241 | for (int i = 1; i <= intent.path().links().size() - 2; i++) { |
| 242 | LinkKey link = linkKey(intent.path().links().get(i)); |
| 243 | linkRequest.add(link); |
| 244 | // add the inverse link. I want that the VLANID is reserved both for |
| 245 | // the direct and inverse link |
| 246 | linkRequest.add(linkKey(link.dst(), link.src())); |
| 247 | } |
| 248 | |
| 249 | Map<LinkKey, MplsLabel> labels = findMplsLabels(creator, linkRequest); |
| 250 | if (labels.isEmpty()) { |
| 251 | throw new IntentCompilationException("No available MPLS Label"); |
| 252 | } |
| 253 | |
| 254 | // for short term solution: same label is used for both directions |
| 255 | // TODO: introduce the concept of Tx and Rx resources of a port |
| 256 | Set<Resource> resources = labels.entrySet().stream() |
| 257 | .flatMap(x -> Stream.of( |
| 258 | Resources.discrete(x.getKey().src().deviceId(), x.getKey().src().port(), x.getValue()) |
| 259 | .resource(), |
| 260 | Resources.discrete(x.getKey().dst().deviceId(), x.getKey().dst().port(), x.getValue()) |
| 261 | .resource() |
| 262 | )) |
| 263 | .collect(Collectors.toSet()); |
| 264 | List<ResourceAllocation> allocations = |
| 265 | creator.resourceService().allocate(intent.id(), ImmutableList.copyOf(resources)); |
| 266 | if (allocations.isEmpty()) { |
Sho SHIMIZU | ec932bd | 2016-03-31 11:09:36 -0700 | [diff] [blame] | 267 | return Collections.emptyMap(); |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | return labels; |
| 271 | } |
| 272 | |
| 273 | private Map<LinkKey, MplsLabel> findMplsLabels(PathCompilerCreateFlow creator, Set<LinkKey> links) { |
| 274 | Map<LinkKey, MplsLabel> labels = new HashMap<>(); |
| 275 | for (LinkKey link : links) { |
| 276 | Set<MplsLabel> forward = findMplsLabel(creator, link.src()); |
| 277 | Set<MplsLabel> backward = findMplsLabel(creator, link.dst()); |
| 278 | Set<MplsLabel> common = Sets.intersection(forward, backward); |
| 279 | if (common.isEmpty()) { |
| 280 | continue; |
| 281 | } |
| 282 | labels.put(link, common.iterator().next()); |
| 283 | } |
| 284 | |
| 285 | return labels; |
| 286 | } |
| 287 | |
| 288 | private Set<MplsLabel> findMplsLabel(PathCompilerCreateFlow creator, ConnectPoint cp) { |
| 289 | return creator.resourceService().getAvailableResourceValues( |
| 290 | Resources.discrete(cp.deviceId(), cp.port()).id(), |
| 291 | MplsLabel.class); |
| 292 | } |
| 293 | |
| 294 | private void manageMplsEncap(PathCompilerCreateFlow<T> creator, List<T> flows, |
| 295 | List<DeviceId> devices, |
| 296 | PathIntent intent) { |
| 297 | Map<LinkKey, MplsLabel> mplsLabels = assignMplsLabel(creator, intent); |
| 298 | |
| 299 | Iterator<Link> links = intent.path().links().iterator(); |
| 300 | Link srcLink = links.next(); |
| 301 | |
| 302 | Link link = links.next(); |
| 303 | // List of flow rules to be installed |
| 304 | |
| 305 | // Ingress traffic |
| 306 | MplsLabel mplsLabel = mplsLabels.get(linkKey(link)); |
| 307 | if (mplsLabel == null) { |
| 308 | throw new IntentCompilationException("No available MPLS Label for " + link); |
| 309 | } |
| 310 | MplsLabel prevMplsLabel = mplsLabel; |
| 311 | |
| 312 | Optional<MplsCriterion> mplsCriterion = intent.selector().criteria() |
| 313 | .stream().filter(criterion -> criterion.type() == Criterion.Type.MPLS_LABEL) |
| 314 | .map(criterion -> (MplsCriterion) criterion) |
| 315 | .findAny(); |
| 316 | |
| 317 | //Push MPLS if selector does not include MPLS |
| 318 | TrafficTreatment.Builder treatBuilder = DefaultTrafficTreatment.builder(); |
| 319 | if (!mplsCriterion.isPresent()) { |
| 320 | treatBuilder.pushMpls(); |
| 321 | } |
| 322 | //Tag the traffic with the new encapsulation MPLS label |
| 323 | treatBuilder.setMpls(mplsLabel); |
| 324 | creator.createFlow(intent.selector(), treatBuilder.build(), |
| 325 | srcLink.dst(), link.src(), intent.priority(), true, flows, devices); |
| 326 | |
| 327 | ConnectPoint prev = link.dst(); |
| 328 | |
| 329 | while (links.hasNext()) { |
| 330 | |
| 331 | link = links.next(); |
| 332 | |
| 333 | if (links.hasNext()) { |
| 334 | // Transit traffic |
| 335 | MplsLabel transitMplsLabel = mplsLabels.get(linkKey(link)); |
| 336 | if (transitMplsLabel == null) { |
| 337 | throw new IntentCompilationException("No available MPLS label for " + link); |
| 338 | } |
| 339 | prevMplsLabel = transitMplsLabel; |
| 340 | |
| 341 | TrafficSelector transitSelector = DefaultTrafficSelector.builder() |
| 342 | .matchInPort(prev.port()) |
| 343 | .matchEthType(Ethernet.MPLS_UNICAST) |
| 344 | .matchMplsLabel(prevMplsLabel).build(); |
| 345 | |
| 346 | TrafficTreatment.Builder transitTreat = DefaultTrafficTreatment.builder(); |
| 347 | |
| 348 | // Set the new MPLS Label only if the previous one is different |
| 349 | if (!prevMplsLabel.equals(transitMplsLabel)) { |
| 350 | transitTreat.setMpls(transitMplsLabel); |
| 351 | } |
| 352 | creator.createFlow(transitSelector, |
| 353 | transitTreat.build(), prev, link.src(), intent.priority(), true, flows, devices); |
| 354 | prev = link.dst(); |
| 355 | } else { |
| 356 | TrafficSelector.Builder egressSelector = DefaultTrafficSelector.builder() |
| 357 | .matchInPort(prev.port()) |
| 358 | .matchEthType(Ethernet.MPLS_UNICAST) |
| 359 | .matchMplsLabel(prevMplsLabel); |
| 360 | TrafficTreatment.Builder egressTreat = DefaultTrafficTreatment.builder(intent.treatment()); |
| 361 | |
| 362 | // Egress traffic |
| 363 | // check if the treatement is popVlan or setVlan (rewrite), |
| 364 | // than selector needs to match any VlanId |
| 365 | for (Instruction instruct : intent.treatment().allInstructions()) { |
| 366 | if (instruct instanceof L2ModificationInstruction) { |
| 367 | L2ModificationInstruction l2Mod = (L2ModificationInstruction) instruct; |
| 368 | if (l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_PUSH) { |
| 369 | break; |
| 370 | } |
| 371 | if (l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_POP || |
| 372 | l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_ID) { |
| 373 | egressSelector.matchVlanId(VlanId.ANY); |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | if (mplsCriterion.isPresent()) { |
| 379 | egressTreat.setMpls(mplsCriterion.get().label()); |
| 380 | } else { |
| 381 | egressTreat.popMpls(outputEthType(intent.selector())); |
| 382 | } |
| 383 | |
| 384 | |
| 385 | if (mplsCriterion.isPresent()) { |
| 386 | egressTreat.setMpls(mplsCriterion.get().label()); |
| 387 | } else { |
| 388 | egressTreat.popVlan(); |
| 389 | } |
| 390 | |
| 391 | creator.createFlow(egressSelector.build(), |
| 392 | egressTreat.build(), prev, link.src(), intent.priority(), true, flows, devices); |
| 393 | } |
| 394 | |
| 395 | } |
| 396 | |
| 397 | } |
| 398 | |
| 399 | private MplsLabel getMplsLabel(Map<LinkKey, MplsLabel> labels, LinkKey link) { |
| 400 | return labels.get(link); |
| 401 | } |
| 402 | |
| 403 | // if the ingress ethertype is defined, the egress traffic |
| 404 | // will be use that value, otherwise the IPv4 ethertype is used. |
| 405 | private EthType outputEthType(TrafficSelector selector) { |
| 406 | Criterion c = selector.getCriterion(Criterion.Type.ETH_TYPE); |
| 407 | if (c != null && c instanceof EthTypeCriterion) { |
| 408 | EthTypeCriterion ethertype = (EthTypeCriterion) c; |
| 409 | return ethertype.ethType(); |
| 410 | } else { |
| 411 | return EthType.EtherType.IPV4.ethType(); |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 416 | /** |
| 417 | * Compiles an intent down to flows. |
| 418 | * |
| 419 | * @param creator how to create the flows |
| 420 | * @param intent intent to process |
| 421 | * @param flows list of generated flows |
| 422 | * @param devices list of devices that correspond to the flows |
| 423 | */ |
| 424 | public void compile(PathCompilerCreateFlow<T> creator, |
| 425 | PathIntent intent, |
| 426 | List<T> flows, |
| 427 | List<DeviceId> devices) { |
| 428 | // Note: right now recompile is not considered |
| 429 | // TODO: implement recompile behavior |
| 430 | |
| 431 | List<Link> links = intent.path().links(); |
| 432 | |
| 433 | Optional<EncapsulationConstraint> encapConstraint = intent.constraints().stream() |
| 434 | .filter(constraint -> constraint instanceof EncapsulationConstraint) |
| 435 | .map(x -> (EncapsulationConstraint) x).findAny(); |
| 436 | //if no encapsulation or is involved only a single switch use the default behaviour |
| 437 | if (!encapConstraint.isPresent() || links.size() == 1) { |
| 438 | for (int i = 0; i < links.size() - 1; i++) { |
| 439 | ConnectPoint ingress = links.get(i).dst(); |
| 440 | ConnectPoint egress = links.get(i + 1).src(); |
| 441 | creator.createFlow(intent.selector(), intent.treatment(), |
| 442 | ingress, egress, intent.priority(), |
| 443 | isLast(links, i), flows, devices); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | encapConstraint.map(EncapsulationConstraint::encapType) |
| 448 | .map(type -> { |
| 449 | switch (type) { |
| 450 | case VLAN: |
| 451 | manageVlanEncap(creator, flows, devices, intent); |
Michele Santuari | 6096acd | 2016-02-09 17:00:37 +0100 | [diff] [blame] | 452 | break; |
| 453 | case MPLS: |
| 454 | manageMplsEncap(creator, flows, devices, intent); |
| 455 | break; |
Ray Milkey | 661c38c | 2016-02-26 17:12:17 -0800 | [diff] [blame] | 456 | default: |
| 457 | // Nothing to do |
| 458 | } |
| 459 | return 0; |
| 460 | }); |
| 461 | } |
| 462 | |
| 463 | } |