| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.net.intent.impl.compiler; |
| |
| import com.google.common.collect.Sets; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onlab.packet.EthType; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.flow.DefaultFlowRule; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.EthTypeCriterion; |
| import org.onosproject.net.flow.instructions.Instruction; |
| import org.onosproject.net.flow.instructions.L2ModificationInstruction; |
| import org.onosproject.net.intent.FlowRuleIntent; |
| import org.onosproject.net.intent.Intent; |
| import org.onosproject.net.intent.IntentCompiler; |
| import org.onosproject.net.intent.IntentExtensionService; |
| import org.onosproject.net.intent.MplsPathIntent; |
| import org.onosproject.net.link.LinkStore; |
| import org.onosproject.net.resource.link.DefaultLinkResourceRequest; |
| import org.onosproject.net.resource.link.LinkResourceAllocations; |
| import org.onosproject.net.resource.link.LinkResourceRequest; |
| import org.onosproject.net.resource.link.LinkResourceService; |
| import org.onosproject.net.resource.link.MplsLabel; |
| import org.onosproject.net.resource.link.MplsLabelResourceAllocation; |
| import org.onosproject.net.resource.ResourceAllocation; |
| import org.onosproject.net.resource.ResourceType; |
| import org.slf4j.Logger; |
| |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| @Component(immediate = true) |
| public class MplsPathIntentCompiler implements IntentCompiler<MplsPathIntent> { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentExtensionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkResourceService resourceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkStore linkStore; |
| |
| protected ApplicationId appId; |
| |
| @Override |
| public List<Intent> compile(MplsPathIntent intent, List<Intent> installable, |
| Set<LinkResourceAllocations> resources) { |
| LinkResourceAllocations allocations = assignMplsLabel(intent); |
| List<FlowRule> rules = generateRules(intent, allocations); |
| |
| return Collections.singletonList(new FlowRuleIntent(appId, rules, intent.resources())); |
| } |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onosproject.net.intent"); |
| intentExtensionService.registerCompiler(MplsPathIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentExtensionService.unregisterCompiler(MplsPathIntent.class); |
| } |
| |
| private LinkResourceAllocations assignMplsLabel(MplsPathIntent intent) { |
| // TODO: do it better... Suggestions? |
| Set<Link> linkRequest = Sets.newHashSetWithExpectedSize(intent.path() |
| .links().size() - 2); |
| for (int i = 1; i <= intent.path().links().size() - 2; i++) { |
| Link link = intent.path().links().get(i); |
| linkRequest.add(link); |
| // add the inverse link. I want that the label is reserved both for |
| // the direct and inverse link |
| linkRequest.add(linkStore.getLink(link.dst(), link.src())); |
| } |
| |
| LinkResourceRequest.Builder request = DefaultLinkResourceRequest |
| .builder(intent.id(), linkRequest).addMplsRequest(); |
| LinkResourceAllocations reqMpls = resourceService |
| .requestResources(request.build()); |
| return reqMpls; |
| } |
| |
| private MplsLabel getMplsLabel(LinkResourceAllocations allocations, Link link) { |
| for (ResourceAllocation allocation : allocations |
| .getResourceAllocation(link)) { |
| if (allocation.type() == ResourceType.MPLS_LABEL) { |
| return ((MplsLabelResourceAllocation) allocation).mplsLabel(); |
| |
| } |
| } |
| log.warn("MPLS label was not assigned successfully"); |
| return null; |
| } |
| |
| private List<FlowRule> generateRules(MplsPathIntent intent, |
| LinkResourceAllocations allocations) { |
| |
| Iterator<Link> links = intent.path().links().iterator(); |
| Link srcLink = links.next(); |
| ConnectPoint prev = srcLink.dst(); |
| |
| Link link = links.next(); |
| // List of flow rules to be installed |
| List<FlowRule> rules = new LinkedList<>(); |
| |
| // Ingress traffic |
| // Get the new MPLS label |
| MplsLabel mpls = getMplsLabel(allocations, link); |
| checkNotNull(mpls); |
| MplsLabel prevLabel = mpls; |
| rules.add(ingressFlow(prev.port(), link, intent, mpls)); |
| |
| prev = link.dst(); |
| |
| while (links.hasNext()) { |
| |
| link = links.next(); |
| |
| if (links.hasNext()) { |
| // Transit traffic |
| // Get the new MPLS label |
| mpls = getMplsLabel(allocations, link); |
| checkNotNull(mpls); |
| rules.add(transitFlow(prev.port(), link, intent, |
| prevLabel, mpls)); |
| prevLabel = mpls; |
| |
| } else { |
| // Egress traffic |
| rules.add(egressFlow(prev.port(), link, intent, |
| prevLabel)); |
| } |
| |
| prev = link.dst(); |
| } |
| return rules; |
| } |
| |
| private FlowRule ingressFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, MplsLabel label) { |
| |
| TrafficSelector.Builder ingressSelector = DefaultTrafficSelector |
| .builder(intent.selector()); |
| TrafficTreatment.Builder treat = DefaultTrafficTreatment.builder(); |
| ingressSelector.matchInPort(inPort); |
| |
| if (intent.ingressLabel().isPresent()) { |
| ingressSelector.matchEthType(Ethernet.MPLS_UNICAST) |
| .matchMplsLabel(intent.ingressLabel().get()); |
| |
| // Swap the MPLS label |
| treat.setMpls(label.label()); |
| } else { |
| // Push and set the MPLS label |
| treat.pushMpls().setMpls(label.label()); |
| } |
| // Add the output action |
| treat.setOutput(link.src().port()); |
| |
| return createFlowRule(intent, link.src().deviceId(), ingressSelector.build(), treat.build()); |
| } |
| |
| private FlowRule transitFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, |
| MplsLabel prevLabel, |
| MplsLabel outLabel) { |
| |
| // Ignore the ingress Traffic Selector and use only the MPLS label |
| // assigned in the previous link |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| selector.matchInPort(inPort).matchEthType(Ethernet.MPLS_UNICAST) |
| .matchMplsLabel(prevLabel.label()); |
| TrafficTreatment.Builder treat = DefaultTrafficTreatment.builder(); |
| |
| // Set the new label only if the label on the packet is |
| // different |
| if (!prevLabel.equals(outLabel)) { |
| treat.setMpls(outLabel.label()); |
| } |
| |
| treat.setOutput(link.src().port()); |
| return createFlowRule(intent, link.src().deviceId(), selector.build(), treat.build()); |
| } |
| |
| private FlowRule egressFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, |
| MplsLabel prevLabel) { |
| // egress point: either set the egress MPLS label or pop the |
| // MPLS label based on the intent annotations |
| |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| selector.matchInPort(inPort).matchEthType(Ethernet.MPLS_UNICAST) |
| .matchMplsLabel(prevLabel.label()); |
| |
| // apply the intent's treatments |
| TrafficTreatment.Builder treat = DefaultTrafficTreatment.builder(intent |
| .treatment()); |
| |
| // check if the treatement is popVlan or setVlan (rewrite), |
| // than selector needs to match any VlanId |
| for (Instruction instruct : intent.treatment().allInstructions()) { |
| if (instruct instanceof L2ModificationInstruction) { |
| L2ModificationInstruction l2Mod = (L2ModificationInstruction) instruct; |
| if (l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_PUSH) { |
| break; |
| } |
| if (l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_POP || |
| l2Mod.subtype() == L2ModificationInstruction.L2SubType.VLAN_ID) { |
| selector.matchVlanId(VlanId.ANY); |
| } |
| } |
| } |
| |
| if (intent.egressLabel().isPresent()) { |
| treat.setMpls(intent.egressLabel().get()); |
| } else { |
| treat.popMpls(outputEthType(intent.selector())); |
| } |
| treat.setOutput(link.src().port()); |
| return createFlowRule(intent, link.src().deviceId(), |
| selector.build(), treat.build()); |
| } |
| |
| protected FlowRule createFlowRule(MplsPathIntent intent, DeviceId deviceId, |
| TrafficSelector selector, TrafficTreatment treat) { |
| return DefaultFlowRule.builder() |
| .forDevice(deviceId) |
| .withSelector(selector) |
| .withTreatment(treat) |
| .withPriority(intent.priority()) |
| .fromApp(appId) |
| .makePermanent() |
| .build(); |
| } |
| |
| // if the ingress ethertype is defined, the egress traffic |
| // will be use that value, otherwise the IPv4 ethertype is used. |
| private EthType outputEthType(TrafficSelector selector) { |
| Criterion c = selector.getCriterion(Criterion.Type.ETH_TYPE); |
| if (c != null && c instanceof EthTypeCriterion) { |
| EthTypeCriterion ethertype = (EthTypeCriterion) c; |
| return ethertype.ethType(); |
| } else { |
| return EthType.EtherType.IPV4.ethType(); |
| } |
| } |
| } |