| /* |
| * Copyright 2015-present 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.sdnip; |
| |
| import com.google.common.collect.ImmutableList; |
| 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.Ethernet; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.incubator.net.intf.Interface; |
| import org.onosproject.incubator.net.intf.InterfaceEvent; |
| import org.onosproject.incubator.net.intf.InterfaceListener; |
| import org.onosproject.incubator.net.intf.InterfaceService; |
| import org.onosproject.incubator.net.routing.ResolvedRoute; |
| import org.onosproject.incubator.net.routing.RouteEvent; |
| import org.onosproject.incubator.net.routing.RouteListener; |
| import org.onosproject.incubator.net.routing.RouteService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.FilteredConnectPoint; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.intent.Constraint; |
| import org.onosproject.net.intent.Key; |
| import org.onosproject.net.intent.MultiPointToSinglePointIntent; |
| import org.onosproject.net.intent.constraint.PartialFailureConstraint; |
| import org.onosproject.routing.IntentSynchronizationService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * FIB component of SDN-IP. |
| */ |
| @Component(immediate = true, enabled = false) |
| public class SdnIpFib { |
| private Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected InterfaceService interfaceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected IntentSynchronizationService intentSynchronizer; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected RouteService routeService; |
| |
| private final InternalRouteListener routeListener = new InternalRouteListener(); |
| private final InternalInterfaceListener interfaceListener = new InternalInterfaceListener(); |
| |
| private static final int PRIORITY_OFFSET = 100; |
| private static final int PRIORITY_MULTIPLIER = 5; |
| protected static final ImmutableList<Constraint> CONSTRAINTS |
| = ImmutableList.of(new PartialFailureConstraint()); |
| |
| private final Map<IpPrefix, MultiPointToSinglePointIntent> routeIntents |
| = new ConcurrentHashMap<>(); |
| |
| private ApplicationId appId; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.getAppId(SdnIp.SDN_IP_APP); |
| |
| interfaceService.addListener(interfaceListener); |
| |
| routeService.addListener(routeListener); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| interfaceService.removeListener(interfaceListener); |
| routeService.removeListener(routeListener); |
| } |
| |
| private void update(ResolvedRoute route) { |
| synchronized (this) { |
| IpPrefix prefix = route.prefix(); |
| MultiPointToSinglePointIntent intent = |
| generateRouteIntent(prefix, route.nextHop(), route.nextHopMac()); |
| |
| if (intent == null) { |
| log.debug("SDN-IP no interface found for route {}", route); |
| return; |
| } |
| |
| routeIntents.put(prefix, intent); |
| intentSynchronizer.submit(intent); |
| } |
| } |
| |
| private void withdraw(ResolvedRoute route) { |
| synchronized (this) { |
| IpPrefix prefix = route.prefix(); |
| MultiPointToSinglePointIntent intent = routeIntents.remove(prefix); |
| if (intent == null) { |
| log.trace("SDN-IP no intent in routeIntents to delete " + |
| "for prefix: {}", prefix); |
| return; |
| } |
| intentSynchronizer.withdraw(intent); |
| } |
| } |
| |
| /** |
| * Generates a route intent for a prefix, the next hop IP address, and |
| * the next hop MAC address. |
| * <p/> |
| * This method will find the egress interface for the intent. |
| * Intent will match dst IP prefix and rewrite dst MAC address at all other |
| * border switches, then forward packets according to dst MAC address. |
| * |
| * @param prefix IP prefix of the route to add |
| * @param nextHopIpAddress IP address of the next hop |
| * @param nextHopMacAddress MAC address of the next hop |
| * @return the generated intent, or null if no intent should be submitted |
| */ |
| private MultiPointToSinglePointIntent generateRouteIntent( |
| IpPrefix prefix, |
| IpAddress nextHopIpAddress, |
| MacAddress nextHopMacAddress) { |
| |
| // Find the attachment point (egress interface) of the next hop |
| Interface egressInterface = |
| interfaceService.getMatchingInterface(nextHopIpAddress); |
| if (egressInterface == null) { |
| log.warn("No outgoing interface found for {}", |
| nextHopIpAddress); |
| return null; |
| } |
| ConnectPoint egressPort = egressInterface.connectPoint(); |
| |
| log.debug("Generating intent for prefix {}, next hop mac {}", |
| prefix, nextHopMacAddress); |
| |
| Set<FilteredConnectPoint> ingressFilteredCPs = Sets.newHashSet(); |
| |
| // TODO this should be only peering interfaces |
| interfaceService.getInterfaces().forEach(intf -> { |
| // Get ony ingress interfaces with IPs configured |
| if (validIngressIntf(intf, egressInterface)) { |
| TrafficSelector.Builder selector = |
| buildIngressTrafficSelector(intf, prefix); |
| FilteredConnectPoint ingressFilteredCP = |
| new FilteredConnectPoint(intf.connectPoint(), selector.build()); |
| ingressFilteredCPs.add(ingressFilteredCP); |
| } |
| }); |
| |
| // Build treatment: rewrite the destination MAC address |
| TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder() |
| .setEthDst(nextHopMacAddress); |
| |
| // Build the egress selector for VLAN Id |
| TrafficSelector.Builder selector = |
| buildTrafficSelector(egressInterface); |
| FilteredConnectPoint egressFilteredCP = |
| new FilteredConnectPoint(egressPort, selector.build()); |
| |
| // Set priority |
| int priority = |
| prefix.prefixLength() * PRIORITY_MULTIPLIER + PRIORITY_OFFSET; |
| |
| // Set key |
| Key key = Key.of(prefix.toString(), appId); |
| |
| return MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .filteredIngressPoints(ingressFilteredCPs) |
| .filteredEgressPoint(egressFilteredCP) |
| .treatment(treatment.build()) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| } |
| |
| private void addInterface(Interface intf) { |
| synchronized (this) { |
| for (Map.Entry<IpPrefix, MultiPointToSinglePointIntent> entry : routeIntents.entrySet()) { |
| // Retrieve the IP prefix and affected intent |
| IpPrefix prefix = entry.getKey(); |
| MultiPointToSinglePointIntent intent = entry.getValue(); |
| |
| // Add new ingress FilteredConnectPoint |
| Set<FilteredConnectPoint> ingressFilteredCPs = |
| Sets.newHashSet(intent.filteredIngressPoints()); |
| |
| // Create the new traffic selector |
| TrafficSelector.Builder selector = |
| buildIngressTrafficSelector(intf, prefix); |
| |
| // Create the Filtered ConnectPoint and add it to the existing set |
| FilteredConnectPoint newIngressFilteredCP = |
| new FilteredConnectPoint(intf.connectPoint(), selector.build()); |
| ingressFilteredCPs.add(newIngressFilteredCP); |
| |
| // Create new intent |
| MultiPointToSinglePointIntent newIntent = |
| MultiPointToSinglePointIntent.builder(intent) |
| .filteredIngressPoints(ingressFilteredCPs) |
| .build(); |
| |
| routeIntents.put(entry.getKey(), newIntent); |
| intentSynchronizer.submit(newIntent); |
| } |
| } |
| } |
| |
| /* |
| * Handles the case in which an existing interface gets removed. |
| */ |
| private void removeInterface(Interface intf) { |
| synchronized (this) { |
| for (Map.Entry<IpPrefix, MultiPointToSinglePointIntent> entry : routeIntents.entrySet()) { |
| // Retrieve the IP prefix and intent possibly affected |
| IpPrefix prefix = entry.getKey(); |
| MultiPointToSinglePointIntent intent = entry.getValue(); |
| |
| // The interface removed might be an ingress interface, so the |
| // selector needs to match on the interface tagging params and |
| // on the prefix |
| TrafficSelector.Builder ingressSelector = |
| buildIngressTrafficSelector(intf, prefix); |
| FilteredConnectPoint removedIngressFilteredCP = |
| new FilteredConnectPoint(intf.connectPoint(), |
| ingressSelector.build()); |
| |
| // The interface removed might be an egress interface, so the |
| // selector needs to match only on the interface tagging params |
| TrafficSelector.Builder selector = buildTrafficSelector(intf); |
| FilteredConnectPoint removedEgressFilteredCP = |
| new FilteredConnectPoint(intf.connectPoint(), selector.build()); |
| |
| if (intent.filteredEgressPoint().equals(removedEgressFilteredCP)) { |
| // The interface is an egress interface for the intent. |
| // This intent just lost its head. Remove it and let higher |
| // layer routing reroute |
| intentSynchronizer.withdraw(routeIntents.remove(entry.getKey())); |
| } else { |
| if (intent.filteredIngressPoints().contains(removedIngressFilteredCP)) { |
| // The FilteredConnectPoint is an ingress |
| // FilteredConnectPoint for the intent |
| Set<FilteredConnectPoint> ingressFilteredCPs = |
| Sets.newHashSet(intent.filteredIngressPoints()); |
| |
| // Remove FilteredConnectPoint from the existing set |
| ingressFilteredCPs.remove(removedIngressFilteredCP); |
| |
| if (!ingressFilteredCPs.isEmpty()) { |
| // There are still ingress points. Create a new |
| // intent and resubmit |
| MultiPointToSinglePointIntent newIntent = |
| MultiPointToSinglePointIntent.builder(intent) |
| .filteredIngressPoints(ingressFilteredCPs) |
| .build(); |
| |
| routeIntents.put(entry.getKey(), newIntent); |
| intentSynchronizer.submit(newIntent); |
| } else { |
| // No more ingress FilteredConnectPoint. Withdraw |
| //the intent |
| intentSynchronizer.withdraw(routeIntents.remove(entry.getKey())); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /* |
| * Builds an ingress traffic selector builder given an ingress interface and |
| * the IP prefix to be reached. |
| */ |
| private TrafficSelector.Builder buildIngressTrafficSelector(Interface intf, IpPrefix prefix) { |
| TrafficSelector.Builder selector = buildTrafficSelector(intf); |
| |
| // Match the destination IP prefix at the first hop |
| if (prefix.isIp4()) { |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| // if it is default route, then we do not need match destination |
| // IP address |
| if (prefix.prefixLength() != 0) { |
| selector.matchIPDst(prefix); |
| } |
| } else { |
| selector.matchEthType(Ethernet.TYPE_IPV6); |
| // if it is default route, then we do not need match destination |
| // IP address |
| if (prefix.prefixLength() != 0) { |
| selector.matchIPv6Dst(prefix); |
| } |
| } |
| return selector; |
| } |
| |
| /* |
| * Builds a traffic selector builder based on interface tagging settings. |
| */ |
| private TrafficSelector.Builder buildTrafficSelector(Interface intf) { |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| |
| // TODO: Consider other tag types |
| // Match the VlanId if specified in the network interface configuration |
| VlanId vlanId = intf.vlan(); |
| if (!vlanId.equals(VlanId.NONE)) { |
| selector.matchVlanId(vlanId); |
| } |
| return selector; |
| } |
| |
| // Check if the interface is an ingress interface with IPs configured |
| private boolean validIngressIntf(Interface intf, Interface egressInterface) { |
| if (!intf.equals(egressInterface) && |
| !intf.ipAddressesList().isEmpty() && |
| // TODO: An egress point might have two routers connected on different interfaces |
| !intf.connectPoint().equals(egressInterface.connectPoint())) { |
| return true; |
| } |
| return false; |
| } |
| |
| private class InternalRouteListener implements RouteListener { |
| @Override |
| public void event(RouteEvent event) { |
| switch (event.type()) { |
| case ROUTE_ADDED: |
| case ROUTE_UPDATED: |
| update(event.subject()); |
| break; |
| case ROUTE_REMOVED: |
| withdraw(event.subject()); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| private class InternalInterfaceListener implements InterfaceListener { |
| |
| @Override |
| public void event(InterfaceEvent event) { |
| switch (event.type()) { |
| case INTERFACE_ADDED: |
| addInterface(event.subject()); |
| break; |
| case INTERFACE_UPDATED: |
| removeInterface(event.prevSubject()); |
| addInterface(event.subject()); |
| break; |
| case INTERFACE_REMOVED: |
| removeInterface(event.subject()); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| } |