| package org.onosproject.net.intent.impl; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| 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.Ethernet; |
| 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.FlowRuleBatchEntry; |
| import org.onosproject.net.flow.FlowRuleBatchOperation; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flow.FlowRuleBatchEntry.FlowRuleOperation; |
| import org.onosproject.net.flow.criteria.Criteria.EthTypeCriterion; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.Criterion.Type; |
| import org.onosproject.net.intent.IntentExtensionService; |
| import org.onosproject.net.intent.IntentInstaller; |
| import org.onosproject.net.intent.MplsPathIntent; |
| import org.onosproject.net.link.LinkStore; |
| import org.onosproject.net.resource.DefaultLinkResourceRequest; |
| import org.onosproject.net.resource.LinkResourceAllocations; |
| import org.onosproject.net.resource.LinkResourceRequest; |
| import org.onosproject.net.resource.LinkResourceService; |
| import org.onosproject.net.resource.MplsLabel; |
| import org.onosproject.net.resource.MplsLabelResourceAllocation; |
| import org.onosproject.net.resource.ResourceAllocation; |
| import org.onosproject.net.resource.ResourceType; |
| import org.slf4j.Logger; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Installer for {@link MplsPathIntent packet path connectivity intents}. |
| */ |
| @Component(immediate = true) |
| public class MplsPathIntentInstaller implements IntentInstaller<MplsPathIntent> { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentExtensionService intentManager; |
| |
| @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; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onosproject.net.intent"); |
| intentManager.registerInstaller(MplsPathIntent.class, this); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| intentManager.unregisterInstaller(MplsPathIntent.class); |
| } |
| |
| @Override |
| public List<FlowRuleBatchOperation> install(MplsPathIntent intent) { |
| LinkResourceAllocations allocations = assignMplsLabel(intent); |
| return generateRules(intent, allocations, FlowRuleOperation.ADD); |
| |
| } |
| |
| @Override |
| public List<FlowRuleBatchOperation> uninstall(MplsPathIntent intent) { |
| LinkResourceAllocations allocations = resourceService |
| .getAllocations(intent.id()); |
| resourceService.releaseResources(allocations); |
| |
| List<FlowRuleBatchOperation> rules = generateRules(intent, |
| allocations, |
| FlowRuleOperation.REMOVE); |
| return rules; |
| } |
| |
| @Override |
| public List<FlowRuleBatchOperation> replace(MplsPathIntent oldIntent, |
| MplsPathIntent newIntent) { |
| |
| List<FlowRuleBatchOperation> batches = Lists.newArrayList(); |
| batches.addAll(uninstall(oldIntent)); |
| batches.addAll(install(newIntent)); |
| return batches; |
| } |
| |
| 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<FlowRuleBatchOperation> generateRules(MplsPathIntent intent, |
| LinkResourceAllocations allocations, |
| FlowRuleOperation operation) { |
| |
| 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<FlowRuleBatchEntry> rules = Lists.newLinkedList(); |
| |
| // 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, operation)); |
| |
| 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, operation)); |
| prevLabel = mpls; |
| |
| } else { |
| // Egress traffic |
| rules.add(egressFlow(prev.port(), link, intent, |
| prevLabel, operation)); |
| } |
| |
| prev = link.dst(); |
| } |
| return Lists.newArrayList(new FlowRuleBatchOperation(rules, null, 0)); |
| } |
| |
| private FlowRuleBatchEntry ingressFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, |
| MplsLabel label, |
| FlowRuleOperation operation) { |
| |
| 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 flowRuleBatchEntry(intent, link.src().deviceId(), |
| ingressSelector.build(), treat.build(), |
| operation); |
| } |
| |
| private FlowRuleBatchEntry transitFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, |
| MplsLabel prevLabel, |
| MplsLabel outLabel, |
| FlowRuleOperation operation) { |
| |
| // 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 flowRuleBatchEntry(intent, link.src().deviceId(), |
| selector.build(), treat.build(), operation); |
| } |
| |
| private FlowRuleBatchEntry egressFlow(PortNumber inPort, Link link, |
| MplsPathIntent intent, |
| MplsLabel prevLabel, |
| FlowRuleOperation operation) { |
| // 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()); |
| |
| if (intent.egressLabel().isPresent()) { |
| treat.setMpls(intent.egressLabel().get()); |
| } else { |
| // if the ingress ethertype is defined, the egress traffic |
| // will be use that value, otherwise the IPv4 ethertype is used. |
| Criterion c = intent.selector().getCriterion(Type.ETH_TYPE); |
| if (c != null && c instanceof EthTypeCriterion) { |
| EthTypeCriterion ethertype = (EthTypeCriterion) c; |
| treat.popMpls((short) ethertype.ethType()); |
| } else { |
| treat.popMpls(Ethernet.TYPE_IPV4); |
| } |
| |
| } |
| treat.setOutput(link.src().port()); |
| return flowRuleBatchEntry(intent, link.src().deviceId(), |
| selector.build(), treat.build(), operation); |
| } |
| |
| protected FlowRuleBatchEntry flowRuleBatchEntry(MplsPathIntent intent, |
| DeviceId deviceId, |
| TrafficSelector selector, |
| TrafficTreatment treat, |
| FlowRuleOperation operation) { |
| FlowRule rule = new DefaultFlowRule( |
| deviceId, |
| selector, |
| treat, |
| 123, // FIXME 123 |
| appId, |
| 0, |
| true); |
| return new FlowRuleBatchEntry(operation, rule, intent.id() |
| .fingerprint()); |
| |
| } |
| } |